(19)
(11)EP 3 875 771 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
28.12.2022 Bulletin 2022/52

(21)Application number: 21160599.3

(22)Date of filing:  04.03.2021
(51)International Patent Classification (IPC): 
F04D 25/08(2006.01)
F04F 1/00(2006.01)
F04F 5/16(2006.01)
(52)Cooperative Patent Classification (CPC):
F04F 5/16; F04D 25/08; F04F 5/44

(54)

BLOWER

GEBLÄSE

VENTILATEUR


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 04.03.2020 KR 20200026973
14.05.2020 KR 20200057727
02.06.2020 KR 20200066278
02.06.2020 KR 20200066279
02.06.2020 KR 20200066280

(43)Date of publication of application:
08.09.2021 Bulletin 2021/36

(73)Proprietor: LG Electronics Inc.
Seoul 07336 (KR)

(72)Inventors:
  • Jung, Jaehyuk
    08592 Seoul (KR)
  • Kim, Kidong
    08592 Seoul (KR)
  • Choi, Seokho
    08592 Seoul (KR)
  • Park, Hyungho
    08592 Seoul (KR)
  • Kim, Hoojin
    08592 Seoul (KR)
  • Jung, Haein
    08592 Seoul (KR)
  • Lee, Changhoon
    08592 Seoul (KR)
  • Kim, Yongmin
    08592 Seoul (KR)
  • Choi, Chiyoung
    08592 Seoul (KR)

(74)Representative: Vossius & Partner Patentanwälte Rechtsanwälte mbB 
Siebertstrasse 3
81675 München
81675 München (DE)


(56)References cited: : 
FR-A1- 3 075 111
US-A1- 2012 051 884
JP-A- 2015 152 005
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The present disclosure relates to a blower. In particular, the present disclosure relates to a blower capable of discharging air by using the coanda effect.

    [0002] A blower may cause a flow of air to circulate air in an indoor space or form airflow toward a user. Recently, many studies have been conducted on an air discharge structure of the blower that may give the user a sense of comfort.

    [0003] In this regard, KR2011-0099318, KR2011-0100274, KR2019-0015325, and KR2019-0025443 disclose a fan or a blowing device for blowing air using a coanda effect.

    [0004] US 2012/051884 A1 relates to an air blowing device formed by a base housing and a motor driving an impeller to create an air flow.

    [0005] FR 3 075 111 A1 relates to a ventilation device for a ventilation, heating and/or air conditioning system for a motor vehicle.

    [0006] However, above conventional techniques have a problem in that air may be discharged only to a certain area. In addition, it is necessary to move or rotate the fan in order to change a wind direction, and accordingly, there is a problem that power is consumed, or noise or vibration is generated.

    [0007] It is an object of the present disclosure to solve the above and other problems.

    [0008] It is another object of the present disclosure to provide a blower capable of blowing air by using a coanda effect.

    [0009] It is another object of the present disclosure to smoothly guide air discharged from a slit formed at a rear part of a blower to a front, thereby minimizing air volume loss or noise generation due to air flow.

    [0010] It is another object of the present disclosure to provide a blower capable of forming airflow blown over a wide range.

    [0011] It is another object of the present disclosure to provide a blower capable of forming various airflow such as diffused wind or rising wind.

    [0012] The invention is specified by independent claim 1. Preferred embodiments are defined in the dependent claims. In accordance with an aspect of the present disclosure, the above and other objects can be accomplished by providing a blower including a fan causing airflow; a lower body forming a lower space therein in which the fan is disposed, and having a suction hole through which air passes; a first upper body being formed by a tower positioned above the lower body, and forming a first inner space communicating with the lower space of the lower body; a second upper body being formed by a tower positioned above the lower body, and forming a second inner space communicating with the lower space of the lower body, the second upper body is spaced apart from the first upper body; and a space formed between the first upper body and the second upper body, and opened in a front-rear direction, wherein the first upper body comprises a first slit formed through the first upper body such that air in the first inner space is discharged into the space, and wherein the second upper body comprises a second slit formed through the second upper body such that air in the second inner space is discharged into the space.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0013] 

    FIG. 1 is a perspective view of a blower according to an embodiment of the present disclosure.

    FIG. 2 is a cross-sectional view taken along line I-I' of FIG. 1.

    FIGS. 3 and 4 are cross-sectional views taken along line II-II' of FIG. 1.

    FIG. 5 is an enlarged view of portion A of FIG. 4.

    FIG. 6 is an experimental graph measuring noise according to a design factor of an opening of FIG. 5.

    FIG. 7 is a graph showing experimental data for each point of FIG. 6.

    FIG. 8 is a perspective view of a blower according to another embodiment of the present disclosure.

    FIG. 9 is a cross-sectional view taken along line X-X' of FIG. 8.

    FIG. 10 is a left side view of FIG. 15 described later.

    FIG. 11 is a cross-sectional view taken along line Z-Z' of FIG. 8.

    FIG. 12 is a perspective view showing a state in which a damper of a blower of FIG. 8 closes a front of a space.

    FIG. 13 is a front view of the blower of FIG. 12.

    FIG. 14 is a plane view of the blower of FIG. 12.

    FIG. 15 is a perspective view showing a state in which a first outer surface of a first upper body of a blower of FIG. 12 is removed.

    FIGS. 16 to 19 are views for explaining a damper assembly of a blower of FIG. 12.

    FIG. 20 is a cross-sectional view taken along line Y1-Y1' of FIG. 13.

    FIG. 21 is a cross-sectional view taken along line Y2-Y2' of FIG. 13.

    FIGS. 22 and 23 are views for explaining diffused wind formed in a first state of a blower, FIG. 22 is a top view of the blower, and FIG. 23 is a perspective view of the blower in which diffused air flow is represented by a dotted arrow.

    FIGS. 24 and 25 are views for explaining rising wind formed in a second state of a blower, and FIG. 24 is a top view of the blower, and FIG. 25 is a perspective view of the blower in which rising air flow is represented by a dotted arrow.

    FIGS. 26 and 27 are experimental graphs measuring a width change of discharge airflow of a blower according to a discharge angle of FIG. 14.



    [0014] Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but identical or similar elements are denoted by the same reference numerals regardless of reference numerals, and redundant descriptions thereof will be omitted.

    [0015] In describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and it is to be understood as including all changes, equivalents, and substitutes included in the technical scope of the present disclosure.

    [0016] Terms including ordinal numbers, such as first and second, may be used to describe various elements, but the elements are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another component.

    [0017] Direction indications of up U, down D, left Le, right Ri, front F and rear R shown in the drawings are for convenience of description only, and the disclosed technical idea is not limited by these.

    [0018] Referring to FIG. 1, a blower 1 may be elongated long in the up-down direction. The blower 1 may include a base 2, a lower body 10, a first upper body 20, and a second upper body 30.

    [0019] The base 2 may form a lower surface of the blower 1 and may be placed on a floor of an indoor space. The base 2 may be formed in a circular plate shape as a whole.

    [0020] The lower body 10 may be disposed above the base 2. The lower body 10 may form a lower side of the blower 1. The lower body 10 may be formed in a cylindrical shape as a whole. For example, a diameter of the lower body 10 may decrease from a lower portion to an upper portion of the lower body 10. For another example, the diameter of the lower body 10 may be kept constant in the up-down direction. A suction hole 12 may be formed to pass through a side surface of the lower body 10. For example, the plurality of suction holes 12 may be evenly disposed along the circumferential direction of the lower body 10. Hereby, air may flow from an outside to an inside of the blower 1 through the plurality of suction holes 12.

    [0021] The first upper body 20 and the second upper body 30 may be disposed above the lower body 10. The first upper body 20 and the second upper body 30 may form an upper side of the blower 1. The first upper body 20 and the second upper body 30 may extend long in the up-down direction and may be spaced apart from each other in the left-right direction. A space 9 may be formed between the first upper body 20 and the second upper body 30 to provide a flow path for air. Meanwhile, the space 9 may be referred to as a blowing space, a valley, or a channel. Meanwhile, the first upper body 20 may be referred to as a first tower, and the second upper body 30 may be referred to as a second tower.

    [0022] The first upper body 20 may be spaced to the left from the second upper body 30. The first upper body 20 may be elongated long in the up-down direction. A first boundary surface 21 of the first upper body 20 toward the space 9 and may define a part of a boundary of the space 9. The first boundary surface 21 of the first upper body 20 may be a curved surface convex to the right or in a direction from the first upper body 20 toward the space 9. A first outer surface 22 of the first upper body 20 may oppose to the first boundary surface 21 of the first upper body 20. The first outer surface 22 of the first upper body 20 may be a curved surface convex to the left or in a direction to opposite to the direction from the first upper body 20 toward the space 9.

    [0023] For example, the first boundary surface 21 of the first upper body 20 may be elongated long in the up-down direction. For example, the first outer surface 22 of the first upper body 20 may be inclined and extended at a certain angle (acute angle) to the right or in a direction toward the space 9 with respect to a vertical line extending in the up-down direction.

    [0024] At this time, a curvature of the first outer surface 22 of the first upper body 20 may be greater than a curvature of the first boundary surface 21 of the first upper body 20. And, the first boundary surface 21 of the first upper body 20 may meet the first outer surface 22 of the first upper body 20 to form an edge. The edge may be provided as a front end 20F and a rear end 20R of the first upper body 20. For example, the front end 20F may be inclined and extended at a certain angle (acute angle) backward with respect to a vertical line extending in the up-down direction. For example, the rear end 20R may be inclined and extended at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

    [0025] The second upper body 30 may be spaced to the right from the first upper body 20. The second upper body 30 may be elongated long in the up-down direction. A second boundary surface 31 of the second upper body 30 toward the space 9 and may define a part of the boundary of the space 9. The second boundary surface 31 of the second upper body 30 may be a curved surface convex to the left or in a direction from the second upper body 30 toward the space 9. The second outer surface 32 of the second upper body 30 may oppose to the second boundary surface 31 of the second upper body 30. The second outer surface 32 of the second upper body 30 may be a curved surface convex to the right or in a direction opposite to the direction from the second upper body 30 toward the space 9.

    [0026] For example, the second boundary surface 31 of the second upper body 30 may be elongated long in the up-down direction. For example, the second outer surface 32 of the second upper body 30 may be inclined and extended at a certain angle (acute angle) to the left or in a direction toward the space 9 with respect to a vertical line extending in the up-down direction.

    [0027] In this case, a curvature of the second outer surface 32 of the second upper body 30 may be greater than a curvature of the second boundary surface 31 of the second upper body 30. And, the second boundary surface 31 of the second upper body 30 may meet the second outer surface 32 of the second upper body 30 to form an edge. The edge may be provided as a front end 30F and a rear end 30R of the second upper body 30. For example, the front end 30F may be inclined and extended at a certain angle (acute angle) backward with respect to a vertical line extending in the up-down direction. For example, the rear end 30R may be inclined and extended at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

    [0028] Meanwhile, the first upper body 20 and the second upper body 30 may be symmetrical in the left-right direction with the space 9 interposed therebetween. And, the first outer surface 22 of the first upper body 20 and the second outer surface 32 of the second upper body 30 may be positioned on a virtual curved surface extending along an outer peripheral surface 11 of the lower body 10. In other words, the first outer surface 22 of the first upper body 20 and the second outer surface 32 of the second upper body 30 may be smoothly connected to the outer peripheral surface 11 of the lower body 10. And, an upper surface of the first upper body 20 and an upper surface of the second upper body 30 may be provided as horizontal surfaces. In this case, the blower 1 may be formed in a truncated cone shape as a whole. Hereby, a risk of the blower 1 being overturned by an external impact may be lowered.

    [0029] A groove 41 may be positioned between the first upper body 20 and the second upper body 30, and may be elongated long in the front-rear direction. The groove 41 may be a curved surface concave downward. The groove 41 may be connected to a lower side of the first boundary surface 21 of the first upper body 20 and a lower side of the second boundary surface 31 of the second upper body 30. The groove 41 may form a part of a boundary of the space 9. Air flowing inside the lower body 10 by the fan 50 to be described later may be distributed to the inner space of the first upper body 20 and the inner space of the second upper body 30 with the groove 41 interposed therebetween. Meanwhile, the groove 41 may be referred to as a connection groove or a connection surface.

    [0030] Meanwhile, a hole 15 may be formed to pass through a side of the lower body 10. The hole 15 may be provided in a front part of the lower body 10. A display (not shown) may be inserted into the hole 15 and exposed forward. In this case, the display may display a driving information of the blower 1, or provide an interface unit for receiving commands of a user. For example, the display may have a touch panel. An outer surface of the display may be formed to have a sense of unity with an outer surface of the lower body 10.

    [0031] Referring to FIG. 2, the lower body 10 may provide a lower space in which a filter 3, a control unit 4, a fan 50, and an air guide 60 are installed, to be described later.

    [0032] The filter 3 may be detachably installed in the lower space of the lower body 10. For example, the filter 3 may be detachably installed at the filter frame 3a fixed to the lower body 10. The filter frame 3a may support a side and an upper side of the filter 3. The filter 3 may be formed in a cylindrical shape as a whole. That is, the filter 3 may include a hole 3P formed to pass through the filter 3 in the up-down direction. In this case, indoor air may flow into the lower body 10 through the suction hole 12 by an operation of the fan 50 to be described later. And, indoor air flowing into the lower body 10 may be purified by flowing from an outer circumferential surface of the filter 3 to an inner circumferential surface of the filter 3 and may flow through the hole 3P upward. Meanwhile, a grill 3b may be disposed between the filter 3 and the fan 50 to be described later, and may provide a hole or flow path communicating with the hole 3P. In the case where the filter 3 is separated from the lower body 10, the grill 3b may prevent a user from putting a finger or the like into an inside of the fan 50.

    [0033] The control unit 4 may be installed in the lower space of the lower body 10. The control unit 4 may be disposed between a base 2 and the filter 3, and may be fixed to the base 2. The control unit 4 may control an operation of the blower 1. The control unit 4 may support the filter 3 and may be referred to as a supporter for the filter 3. On the other hand, a flow of air passing through the filter 3 may be used for cooling the control unit 4 having a heating element.

    [0034] The fan 50 may be installed in the lower space of the lower body 10 and may be disposed above the filter 3. The fan 50 may cause a flow of air flowed into the blower 1 or discharged from the blower 1 to an outside. The fan 50 may include a fan housing 51, a fan motor, a hub 53, a shroud 54, and a blade 55. Meanwhile, the fan 50 may be referred to as a fan assembly or a fan module.

    [0035] The fan housing 51 may form an exterior of the fan 50. The fan housing 51 may include a suction port (no reference numeral) formed to penetrate the fan housing 51 in the up-down direction. The suction port may be formed at a lower end of the fan housing 51 and may be referred to as a bell mouth.

    [0036] The fan motor (not shown) may provide rotational force.
    The fan motor may be a centrifugal fan or a four-flow fan motor. The fan motor may be supported by a motor cover 62 to be described later. At this time, a rotation shaft of the fan motor may extend to a lower side of the fan motor and may penetrate a lower surface of the motor cover 62. The hub 53 may be rotated together with the rotation shaft by coupling the rotation shaft. The shroud 54 may be spaced apart from the hub 53. A plurality of blades 55 may be disposed between the shroud 54 and the hub 53.

    [0037] Accordingly, when the fan motor is driven, air may be flowed into an axial direction of the fan motor (i.e., a longitudinal direction of the rotation shaft) through the suction port and may be discharged in a radial direction of the fan motor and an upper side of that.

    [0038] An air guide 60 may provide a flow path 60P through which air discharged from the fan 50 flows. For example, the flow path 60P may be an annular flow path. The air guide 60 may include a guide body 61, a motor cover 62, and a vane 63. Meanwhile, the air guide 60 may be referred to as a diffuser.

    [0039] The guide body 61 may form an exterior of the air guide 60. The motor cover 62 may be disposed at a center part of the air guide 60. For example, the guide body 61 may be formed in a cylindrical shape. And, the motor cover 62 may be formed in a bowl shape. In this case, the above-described the annular flow path 60P may be formed between the guide body 61 and the motor cover 62. The vane 63 may guide air provided to the flow path 60P from the fan 50 upward. A plurality of vanes 63 may be disposed at the annular flow path 60P and may be spaced apart from each other in a circumferential direction of the guide body 61. At this time, each of the plurality of vanes 63 may extend from an outer surface of the motor cover 62 to an inner circumferential surface of the guide body 61.

    [0040] A distribution unit 40 may be positioned above the air guide 60 and may be disposed between the lower body 10 and the upper bodies 20 and 30. The distribution unit 40 may provide a flow path 40P through which air passing through the air guide 60 flows. Air passing through the air guide 60 may be distributed to the first upper body 20 and the second upper body 30 through the distribution unit 40. In other words, the air guide 60 may guide air flowing by the fan 50 to the distribution unit 40, and the distribution unit 40 may guide air flowed from the air guide 60 to the first upper body 20 and the second upper body 30. The aforementioned groove 41 (see FIG. 1) may form a part of an outer surface of the distribution unit 40. Meanwhile, the distribution unit 40 may be referred to as a middle body, an inner body, or a tower base.

    [0041] Referring to FIGS. 2 and 3, a central axis O may extend from a center of the space 9 in the up-down direction, and a shape of the blower 1 may be symmetrical with respect to the central axis O in the left-right direction. A reference line L may extend in front-rear direction by crossing the central axis O, and a cross section of the blower 1 may be symmetrical with respect to the reference line L in the left-right direction.

    [0042] The first upper body 20 may provide a first flow path 20P through which a part of air passing through the air guide 60 flows. The first flow path 20P may be formed in the inner space of the first upper body 20. The second upper body 30 may provide a second flow path 30P through which the rest of the air passing through the air guide 60 flows. The second flow path 30P may be formed in the inner space of the second upper body 30. The first flow path 20P and the second flow path 30P may be communicate with the flow path 40P of the distribution unit 40 and the flow path 60P of the air guide 60.

    [0043] A first slit 20S may discharge air flowing through the first flow path 20P to the space 9. The first slit 20S may be adjacent to a rear end 20R (see FIG. 1) of the first upper body 20 and may be formed to pass through the first boundary surface 21 of the first upper body 20. The first slit 20S may be formed long along the rear end 20R of the first upper body 20. For example, the first slit 20S may be hidden from a user's gaze looking from a front direction to a rear direction of the blower 1.

    [0044] A second slit 30S may discharge air flowing through the second flow path 30P to the space 9. The second slit 30S may be adjacent to a rear end 30R (see to FIG. 1) of the second upper body 30 and may formed to pass through the second interface 31 of the second upper body 30. The second slit 30S may be formed to extend along the rear end 30R of the second upper body 30. For example, the second slit 30S may be hidden from the user's gaze looking from a front direction to a rear direction of the blower 1.

    [0045] For example, the first slit 20S and the second slit 30S face each other and may be symmetrical to each other. For example, the first slit 20S may be provided as an outlet end of the first opening L-O, and the second slit 30S may be provided as an outlet end of the second opening R-O.

    [0046] First inner sleeves 25, 26 may be coupled to the inner surface of the first upper body 20 and may define a boundary of the first flow path 20P. One end and the other end of the first inner sleeves 25, 26 are spaced apart from each other, and the first opening L-O may be formed between the one end and the other end of the first inner sleeves 25, 26.

    [0047] Specifically, the first inner sleeves 25, 26 may include a first part 25 and a second part 26. The first part 25 may include a first extension portion 25a and first discharge portions 25b, 25c. The second part 26 may include a second guide portion 26a, a second extension portion 26b, and a second discharge portion 26c.

    [0048] The first extension portion 25a may be coupled to at least a part of an inner surface (no reference numeral) of a part of the first upper body 20 forming the first boundary surface 21. The first extension portion 25a may extend along the inner surface. In this case, the first extension portion 25a may be formed convexly toward the first boundary surface 21.

    [0049] The first discharge portions 25b, 25c may form an acute angle with respect to the reference line L and may be obliquely extended from the first extension portion 25a rearward. A thickness of the first discharge portions 25b, 25c may be greater than a thickness of the first extension portion 25a. The first discharge portions 25b, 25c may be approximatively formed in a shape of an airfoil. The first discharge portions 25b, 25c may form one end of the first inner sleeves 25, 26.

    [0050] At this time, the first discharge portions 25b, 25c may include a first guide surface 25b connected to an inner surface of the first extension portions 25a and defined the boundary of the first flow path 20P together with the inner surface of the first extension portion 25a. The first discharge portions 25b, 25c may include a first discharge surface 25c bent from the first guide surface 25b and defined the boundary of the first opening L-O. An angle of the first guide surface 25b with respect to the reference line L may be smaller than an angle of the first discharge surface 25c with respect to the reference line L. For example, the first guide surface 25b may be a curved surface or a flat surface, and the first discharge surface 25c may be a curved surface.

    [0051] The second guide portion 26a may be disposed in front of the above-described first extension portion 25a. The second guide portion 26a may be coupled to a part of an inner surface (no reference numeral) of a part forming the first outer surface 22 of the first upper body 20. The second guide portion 26a may extend along the inner surface. The second guide portion 26a may be formed convexly toward the first outer surface 22. A thickness of the second guide portion 26a is greater than a thickness of the first extension portion 25a but may decrease as a distance from the first boundary surface 21 increases. The second guide portion 26a may be approximately formed in a fin shape. For example, a part of the second guide portion 26a may be coupled to a part of a part forming the first boundary surface 21 of the first upper body 20 to be in contact with or coupled to the first extension portion 25a.

    [0052] The second extension portion 26b may extend from the second guide portion 26a and may be coupled to a part of the inner surface (no reference numeral) of the part forming the first outer surface 22 of the first upper body 20. The second extension portion 26b may extend along the inner surface. The second extension portion 26b may be formed convexly toward the first outer surface 22. A thickness of the second extension portion 26b may be smaller than a thickness of the second guide portion 26a and may be the same as or similar to the thickness of the first extension portion 25a. In this case, an inner surface of the second extension portion 26b may define the boundary of the first flow path 20P together with the inner surface of the second guide portion 26a.

    [0053] The second discharge portion 26c may extend from the second extension portion 26b and may be coupled to a portion of a portion forming the first boundary surface 21 of the first upper body 20. A thickness of the second discharge portion 26c may be greater than a thickness of the second extension portion 26b. The second discharge portion 26c may form the other end of the first inner sleeves 25, 26.

    [0054] At this time, the inner surface of the second discharge portion 26c may be connected to the inner surface of the second extension portion 26b and may define a boundary of the first opening L-O. In other words, the inner surface of the second discharge part 26c may face the first discharge surface 25c, and the first opening L-0 may be formed between the inner surface of the second discharge part 26c and the first discharge surface 25c. And an outlet end of the first opening L-O may be provided as the first slit 20S penetrating the first boundary surface 21. Meanwhile, the inner surface of the second discharge portion 26c may be referred to as a second discharge surface.

    [0055] Therefore, air flowing through the first flow path 20P may be provided to the space 9 through the first opening L-O and the first slit 20S. At this time, the first inner sleeves 25, 26 may smoothly guide the air flowing through the first flow path 2OP to the first opening L-O while forming the boundary of the first flow path 20P.

    [0056] Second inner sleeves 35, 36 may be coupled to an inner surface of the second upper body 30 and may define a boundary of the second flow path 30P. One end and the other end of the second inner sleeves 35, 36 may be spaced apart from each other and the second opening R-O may be formed between one end and the other end of the second inner sleeves 35, 36.

    [0057] Specifically, the second inner sleeves 35, 36 may include a first part 35 and a second part 36. The first part 35 may include a first extension portion 35a and first discharge parts 35b, 35c. The second part 36 may include a second guide part 36a, a second extension part 36b, and a second discharge part 36c.

    [0058] The first extension part 35a may be coupled to at least a part of an inner surface (no reference numeral) of a part forming the second boundary surface 31 of the second upper body 30. The first extension part 35a may extend along the inner surface. In this case, the first extension part 35a may be formed convexly toward the second boundary surface 31.

    [0059] The first discharge portions 35b, 35c may form an acute angle with respect to the reference line L and may be obliquely extended from the first extension part 35a rearward. A thickness of the first discharge portions 35b, 35c may be greater than a thickness of the first extension portion 35a. The first discharge parts 35b, 35c may be approximatively formed in a shape of an airfoil. The first discharge portions 35b, 35c may form one end of the second inner sleeves 35, 36.

    [0060] At this time, the first discharge portions 35b, 35c may include a first guide surface 35b connected to an inner surface of the first extension portions 35a and defined the boundary of the second flow path 30P together with the inner surface of the first extension portion 35a. The first discharge portions 35b, 35c may include a first discharge surface 35c bent from the first guide surface 35 and defined the boundary of the second opening R-O. An angle of the first guide surface 35b with respect to the reference line L may be smaller than an angle of the first discharge surface 35c with respect to the reference line L. For example, the first guide surface 35b may be a curved surface or a flat surface, and the first discharge surface 35c may be a curved surface.

    [0061] The second guide portion 36a may be disposed in front of the above-described first extension portion 35a. The second guide portion 36a may be coupled to a part of an inner surface (no reference numeral) of a part forming the second outer surface 32 of the second upper body 30. The second guide portion 36a may extend along the inner surface. The second guide portion 36a may be formed convexly toward the second outer surface 32. A thickness of the second guide portion 36a may be greater than a thickness of the first extension portion 35a but may decrease as the distance from the second boundary surface 31 increases. The second guide portion 36a may be approximately formed in a fin shape. For example, a part of the second guide portion 36a may be coupled to a part of a part forming the second boundary surface 31 of the second upper body 30 to be in contact with or be coupled to the first extension portion 35a.

    [0062] The second extension portion 36b may extend from the second guide portion 36a and may be coupled to a part of the inner surface (no reference numeral) of a part forming the second outer surface 32 of the second upper body 30. The second extension portion 36b may extend along the inner surface. The second extension portion 36b may be formed convexly toward the second outer surface 32. A thickness of the second extension portion 36b may be smaller than a thickness of the second guide portion 36a and may be the same as or similar to the thickness of the first extension portion 35a. At this time, an inner surface of the second extension portion 36b may define the boundary of the second flow path 30P together with the inner surface of the second guide portion 36a.

    [0063] The second discharge portion 36c may extend from the second extension portion 36b and may be coupled to a part of a part forming the second boundary surface 31 of the second upper body 30. A thickness of the second discharge portion 36c may be greater than a thickness of the second extension portion 36b. The second discharge portion 36c may form the other end of the second inner sleeves 35, 36.

    [0064] In this case, the inner surface of the second discharge portion 36c may be connected to the inner surface of the second extension portion 36b and may define a boundary of the second opening R-O. In other words, the inner surface of the second discharge part 36c may face the first discharge surface 35c, and the second opening R-0 may be formed between the inner surface of the second discharge part 36c and the first discharge surface 35c. And an outlet end of the second opening R-O may be provided as the second slit 30S penetrating the second boundary surface 31. Meanwhile, the inner surface of the second discharge portion 36c may be referred to as a second discharge surface.

    [0065] Therefore, air flowing through the second flow path 30P may be provided to the space 9 through the second opening R-O and the second slit 30S. In this case, the second inner sleeves 35, 36 may smoothly guide the air flowing through the second flow path 30P to the second opening R-O while forming the boundary of the second flow path 30P.

    [0066] Referring to FIG. 4, the first opening (L-O) and the second opening (R-O) may communicate with the space 9 and may face each other.
    Air passing through the first flow path 20P may be discharged to the first slit 20S which is provided to an inlet end of the first opening L-O and is an outlet end of the first opening L-O. At this time, the inlet end of the first opening L-O may be positioned in the inner space of the first upper body 20 forming the first flow path 20P. The first opening L-O may be formed to be inclined or bent toward a front direction. For example, the first opening L-O may be formed to be inclined or bent toward a front direction of the second opening R-O.
    Air passing through the second flow path 30P may be discharged to the second slit 30S which is provided to an inlet end of the second opening R-O and is an outlet end of the second opening R-O. At this time, the inlet end of the second opening R-O may be positioned in the inner space of the second upper body 30 forming the second flow path 30P. The second opening R-0 may be formed to be inclined or bent toward a front direction. For example, the second opening R-O may be formed to be inclined to or bent toward a front direction of the first opening L-O.

    [0067] Accordingly, a part of the air flowing by the fan 50 (see FIG. 2) may be discharged to the space 9 through the first slit 20S, and the rest of the air may be discharged to the space 9 through the second slit 30S, so that air may be mixed in the space 9. And, due to the coanda effect, air discharged to the space 9 may flow forward along the first boundary surface 21 of the first upper body 20 and the second boundary surface 31 of the second upper body 30 (see reference numeral FR). In addition, such a flow of air may form airflow in which air around the upper bodies 20, 30 is entrained into the space 9 or flow forward along the outer surfaces 22, 32. As a result, the blower 1 may provide airflow with a rich volume to a user or the like.

    [0068] Referring to FIG. 5, the first discharge surface 35c may include a first curved surface 35c-1 and a second curved surface 35c-2. The first curved surface 35c-1 may be connected to the guide surface 35b, and the second curved surface 35c-2 may be connected to the first curved surface 35c-1. The first curved surface 35c-1 and the second curved surface 35c-2 may face the inner surface of the second discharge portion 36c. At this time, the inner surface of the second discharge part 36c may extend while drawing an arc at a constant curvature with respect to a center of curvature positioned in front of the second discharge part 36c. And the first curved surface 35c-1 may extend while drawing an arc at a constant curvature with respect to a center of curvature positioned in front of the first curved surface 35c-1. In addition, the second curved surface 35c-2 may extend while drawing an arc at a constant curvature with respect to a center of curvature positioned in front of the second curved surface 35c-2.

    [0069] The curvature of the first curved surface 35c-1 may be greater than the curvature of the inner surface of the second discharge portion 36c. In this case, a gap between the first curved surface 35c-1 and the inner surface of the second discharge portion 36c may decrease toward a downstream of the second opening R-O. Meanwhile, a section positioned between the first curved surface 35c-1 and the inner surface of the second discharge portion 36c as a part of the second opening R-O may be referred to as a tapered section or a converging section.

    [0070] The curvature of the second curved surface 35c-2 may be the same as the curvature of the inner surface of the second discharge portion 36c. In this case, a gap between the second curved surface 35c-2 and the inner surface of the second discharge portion 36c may be constant. Meanwhile, as section excluding the tapered section of the second opening R-O, the section positioned between the second curved surface 35c-2 and the inner surface of the second discharge portion 36c may be referred to as a curved section.

    [0071] A first gap 30Ga may be defined as a gap between one side of the first curved surface 35c-1 and one side of the inner surface of the second discharge part 36c. A second gap 30Gb may be defined as a gap between the other side of the second curved surface 35c-2 and an inner surface of the second discharge part 36c closest to the other side of the second curved surface 35c-2. In this case, the other side of the second curved surface 35c-2 may be connected to one side of the first curved surface 35c-1 or may be integrally formed with each other. A third gap 30Gc may be defined as a gap between the other side of the second curved surface 35c-2 and the other side of the inner surface of the second discharge portion 36c. In addition, the third gap 30Gc may mean a width or gap of the second slit 30S.

    [0072] In this case, the second gap 30Gb may be smaller than the first gap 30Ga, and the third gap 30Gc may be the same as the second gap 30Gb.

    [0073] Accordingly, air accelerated while passing through the tapered section may be smoothly guided to the second boundary surface 31 through the curved section. That is, a flow direction of air discharged from the second flow path 30P to the space 9 may be smoothly switched from a rear direction to a front direction through the second opening R-O. Meanwhile, contents of the above-described first discharge surface 35c and the like may apply to the first discharge surface 25c as well.

    [0074] Meanwhile, air noise may vary depending on the width of the first opening L-O or the second opening R-O, or the curvature of the portion forming the first opening L-O or the second opening R-O.

    [0075] Referring to FIGS. 6 to 7, under the condition that a blowing amount of the fan 50 (see FIG. 2) is 10 CMM, a noise(dB) generated from the first opening L-0 or the second opening R-0 according to a width W and a diameter D of the first opening L-O or the second opening R-O may be confirmed. Here, a width W of the second opening R-O is the same as a width of the first opening L-O as the third gap (30Gc, see FIG. 5), and a diameter D of the second opening R-O is the same as a diameter of the first opening L-O as twice a reciprocal of the curvature of the second curved surface 35c-2.

    [0076] When the width W is 10 mm or less, a noise of 45 dB or less may be measured at the first opening L-O or the second opening R-O. When the width W exceeds 10 mm, the noise of 45 dB or more may be measured at the first opening L-O or the second opening R-O.

    [0077] When the diameter D is 21 to 27 mm, the noise of 45 dB or less may be measured at the first opening L-O or the second opening R-O. When the diameter D is outside the range of 21 to 27 mm above, the noise of 45 dB or more may be measured at the first opening L-O or the second opening R-O.

    [0078] That is, when the diameter D is 21 to 27 mm and the width W is 10 mm or less, noise generated at the first opening L-O or the second opening R-O may be minimized. Preferably, the noise may be minimized in a region S. When the diameter D is 22 to 24 mm and the width W is 9 mm, the noise generated from the first opening L-O or the second opening R-O may be the smallest as 44. 4 dB.

    [0079] Referring to FIG. 8, the blower 100 may be elongated long in the up-down direction. The blower 100 may include a base 102, a lower body 110, a first upper body 120, and a second upper body 130.

    [0080] The base 2 may form a lower surface of the blower 100 and may be placed on a floor of an indoor space. The base 1022 may be formed in a circular plate shape as a whole.

    [0081] The lower body 110 may be disposed above the base 102. The lower body 110 may form a lower side of the blower 100. The lower body 101 may be formed in a cylindrical shape as a whole. For example, a diameter of the lower body 110 may decrease from a lower part to an upper part of the lower body 110. For another example, the diameter of the lower body 110 may be kept constant in the up-down direction. A suction hole 112 may be formed to pass through a side surface of the lower body 110. For example, a plurality of suction holes 112 may be evenly disposed along a circumferential direction of the lower body 110. As a result, air may flow from an outside to an inside of the blower 100 through the plurality of suction holes 112.

    [0082] The first upper body 120 and the second upper body 130 may be disposed above the lower body 110. The first upper body 120 and the second upper body 130 may form an upper side of the blower 100. The first upper body 120 and the second upper body 130 extend long in the up-down direction and may be spaced apart from each other in the left-right direction. The space 109 is formed between the first upper body 120 and the second upper body 130 to provide a flow path for air. Meanwhile, the space 109 may be referred to as a blowing space, a valley, or a channel. Meanwhile, the first upper body 120 may be referred to as a first tower, and the second upper body 130 may be referred to as a second tower.

    [0083] The first upper body 120 may be spaced to the left from the second upper body 130. The first upper body 120 may be elongated long in the up-down direction. A first boundary surface 121 of the first upper body 120 toward the space 9 and may define a part of a boundary of the space 109. The first boundary surface 121 of the first upper body 120 may be a curved surface convex to the right or in a direction from the first upper body 120 toward the space 109. A first outer surface 122 of the first upper body 120 may oppose the first boundary surface 121 of the first upper body 120. The first outer surface 122 of the first upper body 120 may be a curved surface convex to the left or in a direction to opposite a direction from the first upper body 120 toward the space 109.

    [0084] For example, the first boundary surface 121 of the first upper body 120 may be elongated long in the up-down direction. For example, the first outer surface 122 of the first upper body 120 may be inclined and extended at a certain angle (acute angle) to the right or in a direction toward the space 109 with respect to a vertical line extending in the up-down direction.

    [0085] At this time, a curvature of the first outer surface 122 of the first upper body 120 may be greater than a curvature of the first boundary surface 121 of the first upper body 120. In addition, the first boundary surface 121 of the first upper body 120 may meet the first outer surface 122 of the first upper body 120 to form an edge. The edge may be provided as a front end 120F and a rear end 120R of the first upper body 120. For example, the front end 120F may be inclined and extended at a certain angle (acute angle) backward with respect to a vertical line extending in the up-down direction. For example, the rear end 120R may be inclined and extended at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

    [0086] The second upper body 130 may be spaced to the right from the first upper body 120. The second upper body 130 may be elongated in the up-down direction. A second boundary surface 131 of the second upper body 130 toward the space 109 and may define a part of the boundary of the space 109. The second boundary surface 131 of the second upper body 130 may be a curved surface convex to the left or in a direction from the second upper body 130 toward the space 109. The second outer surface 132 of the second upper body 30 may oppose the second boundary surface 131 of the second upper body 130. The second outer surface 132 of the second upper body 130 may be a curved surface convex to the right or in a direction opposite to a direction from the second upper body 30 toward the space 109.

    [0087] For example, the second boundary surface 131 of the second upper body 130 may be elongated long in the up-down direction. For example, the second outer surface 132 of the second upper body 130 may be inclined and extended at a certain angle (acute angle) to the left or in a direction toward the space 109 with respect to a vertical line extending in the up-down direction.

    [0088] At this time, a curvature of the second outer surface 132 of the second upper body 130 may be greater than a curvature of the second boundary surface 131 of the second upper body 130. And, the second boundary surface 131 of the second upper body 130 may meet the second outer surface 132 of the second upper body 130 to form an edge. The edge may be provided as a front end 130F and a rear end 130R of the second upper body 130. For example, the front end 130F may be inclined and extended at a certain angle (acute angle) backward with respect to a vertical line extending in the up-down direction. For example, the rear end 130R may be inclined and extended at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

    [0089] Meanwhile, the first upper body 120 and the second upper body 130 may be symmetrical in the left-right direction with the space 109 interposed therebetween. And, the first outer surface 122 of the first upper body 120 and the second outer surface 132 of the second upper body 130 may be positioned on a virtual curved surface extending along an outer peripheral surface 111 of the lower body 110. In other words, the first outer surface 122 of the first upper body 120 and the second outer surface 132 of the second upper body 30 may be smoothly connected to the outer peripheral surface 111 of the lower body 110. And, an upper surface of the first upper body 120 and an upper surface of the second upper body 130 may be provided as horizontal surfaces. In this case, the blower 1 may be formed in a truncated cone shape as a whole. As a result, a risk of the blower 100 being overturned by an external impact may be lowered.

    [0090] A groove 141 may be positioned between the first upper body 120 and the second upper body 130 and may be elongated long in the front-rear direction. The groove 141 may be a curved surface concave downward. The groove 141 may include a first side 141a (see FIG. 12) connected to a lower side of the first boundary surface 121 of the first upper body 120 and a second side 141b (see FIG. 12) connected to a lower side of the second boundary surface 131 of the second upper body 130. The groove 141 may form a part of a boundary of the space 109. Air flowing inside the lower body 110 by the fan 50 to be described later may be distributed to the inner space of the first upper body 120 and the inner space of the second upper body 130 with the groove 141 interposed therebetween. Meanwhile, the groove 141 may be referred to as a connection groove or a connection surface.

    [0091] Meanwhile, a cover 113 may be detachably coupled to the lower body 110. The cover 113 may be provided as a part of the lower body 110. When the cover 113 is separated from the lower body 110, a user may access the lower space of the lower body 110. For example, the suction hole 112 may also be formed at the cover 113.

    [0092] Meanwhile, a display (not shown) may be provided at a front of the lower body 110 and may provide an interface for displaying driving information of the blower 100 or receiving a user's command. For example, the display may have a touch panel.

    [0093] Referring to FIG. 9, the lower body 110 may provide a lower space in which a filter 103, a fan 150, and an air guide 160 are installed, to be described later.

    [0094] The filter 103 may be detachably installed in the lower space of the lower body 110. The filter 103 may be formed in a cylindrical shape as a whole. That is, the filter 103 may include a hole 103P formed to pass through the filter 103 in the up-down direction. In this case, indoor air may flow into the lower body 110 through the suction hole 112 (see FIG. 8) by an operation of the fan 150 to be described later. And, indoor air flowing into the lower body 110 may be purified by flowing from an outer circumferential surface of the filter 103 to an inner circumferential surface of the filter 103 and may flow upward through the hole 103P.

    [0095] The fan 150 may be installed in the lower space of the lower body 110 and may be disposed above the filter 103. The fan 150 may cause a flow of air flowed into the blower 100 or discharged from the blower 100 to an outside. The fan 150 may include a fan housing (no reference numeral), a fan motor 152, a hub 153, a shroud 154, and a blade 155. Meanwhile, the fan 150 may be referred to as a fan assembly or a fan module.

    [0096] The fan housing may form an exterior of the fan 150. The fan housing may include a suction port (no reference numeral) formed to pass through the fan housing in the up-down direction. The suction port may be formed at a lower end of the fan housing and may be referred to as a bell mouth.

    [0097] The fan motor 152 may provide rotational force. The fan motor 152 may be a centrifugal fan motor or a four-flow fan motor. The fan motor 152 may be supported by a motor cover 162 to be described later. At this time, a rotation shaft of the fan motor 152 may extend to a lower side of the fan motor 152 and may penetrate a lower surface of the motor cover 162. The hub 153 may be coupled with the rotation shaft and may rotate together with the rotation shaft. The shroud 154 may be spaced apart from the hub 153. A plurality of blades 155 may be disposed between the shroud 154 and the hub 153.

    [0098] Accordingly, when the fan motor 152 is driven, air may be flowed into an axial direction of the fan motor 152 (i.e., a longitudinal direction of the rotation shaft) through the suction port and may be discharged to a radial direction of the fan motor 152 and an upper side of that.

    [0099] An air guide 160 may provide a flow path 160P through which air discharged from the fan 150 flows. For example, the flow path 160P may be an annular flow path. The air guide 160 may include a guide body 161, a motor cover 162, and a vane 163. Meanwhile, the air guide 160 may be referred to as a diffuser.

    [0100] The guide body 161 may form an exterior of the air guide 160. The motor cover 162 may be disposed at a center part of the air guide 160. For example, the guide body 161 may be formed in a cylindrical shape. And, the motor cover 162 may be formed in a bowl shape. In this case, the above-described the annular flow path 160P may be formed between the guide body 161 and the motor cover 162. The vane 163 may guide air provided to the flow path 160P from the fan 150 upward. A plurality of vanes 163 may be disposed at the annular flow path 160P and may be spaced apart from each other in a circumferential direction of the guide body 161. At this time, each of the plurality of vanes 163 may extend from an outer surface of the motor cover 162 to an inner circumferential surface of the guide body 161.

    [0101] A distribution unit 140 may be positioned above the air guide 160 and may be disposed between the lower body 110 and the upper bodies 120 and 130. The distribution unit 140 may provide a flow path 140P through which air passing through the air guide 160 flows. Air passing through the air guide 160 may be distributed to the first upper body 120 and the second upper body 130 through the distribution unit 140. In other words, the air guide 160 may guide air flowing by the fan 150 to the distribution unit 140, and the distribution unit 140 may guide air flowed from the air guide 160 to the first upper body 120 and the second upper body 130. The aforementioned groove 141 (see to FIG. 1) may form a part of an outer surface of the distribution unit 140. Meanwhile, the distribution unit 140 may be referred to as a middle body, an inner body, or a tower base. For example, the first upper body 120 and the second upper body 130 may be symmetrical left and right.

    [0102] The first upper body 120 may provide a first flow path 120P through which a part of air passing through the air guide 160 flows. The first flow path 120P may be formed in the inner space of the first upper body 120. The second upper body 130 may provide a second flow path 130P through which the rest of the air passing through the air guide 160 flows. The second flow path 130P may be formed in the inner space of the second upper body 130. The first flow path 120P and the second flow path 130P may be communicate with the flow path 140P of the distribution unit 140 and the flow path 160P of the air guide 160.

    [0103] Referring to FIGS. 8 and 10, a first slit 120S may discharge air flowing through the first flow path 120P to the space 109. The first slit 120S may be adjacent to a rear end 120R of the first upper body 120 and may be formed to pass through the first boundary surface 121 of the first upper body 120. The first slit 120S may be formed along the rear end 120R of the first upper body 120. For example, the first slit 120S may be hidden from a user's gaze looking from a front direction to a rear direction of the blower 100.

    [0104] At this time, the first slit 120S may be formed to be inclined at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

    [0105] For example, the first slit 120S may be parallel to the rear end 120R of the first upper body 120. For another example, the first slit 120S may not be parallel to the rear end 120R of the first upper body 120, and a slope of the first slit 120S with respect to the vertical line may be greater than a slope of the rear end 120R.

    [0106] Referring to FIGS. 8 and 11, a second slit 130S may discharge air flowing through the second flow path 130P (see FIG. 9) to the space 109. The second slit 130S may be adjacent to a rear end 130R of the second upper body 130 and may be formed to pass through the second boundary surface 131 of the second upper body 130. The second slit 130S may be formed to extend along the rear end 130R of the second upper body 130. For example, the second slit 130S may be hidden from the user's gaze looking from a front direction to a rear direction of the blower 100.

    [0107] At this time, the second slit 130S may be formed to be inclined at a certain angle (acute angle) forward with respect to the vertical line extending in the up-down direction.

    [0108] For example, the second slit 130S may be parallel to the rear end 130R of the second upper body 130. For another example, the second slit 130S may not be parallel to the rear end 130R of the second upper body 130. In this case, the second slit 130S may be inclined at a first angle a1 (for example, 4 degrees) with respect to a vertical line V, and the rear end 130R may be inclined at a second angle a2 (for example, 3 degrees) which is smaller than the first angle a1 with respect to the vertical line V.

    [0109] Meanwhile, the first slit 120S (see FIG. 10) and the second slit 130S may face each other and may be symmetrical to each other.

    [0110] Referring to FIGS. 9 and 10 again, vanes 124, 134 may be installed in the inner space of the first upper body 120 and the inner space of the second upper body 130 to guide a flow of air.

    [0111] A first vane 124 may guide air rising from the first flow path 120P to the first slit 120S. The first vane 124 may be adjacent to the first slit 120S and may be fixed to the inner surface of the first upper body 120. The first vane 124 may have a convex shape upward. The first vane 124 may include a plurality of first vanes 124 spaced apart from each other in the up-down direction. Each of the plurality of first vanes 124 may have one end adjacent to the first slit 120S, and the plurality of first vanes 124 may be spaced apart from each other along the first slit 120S. Each of the plurality of first vanes 124 may have different shapes.

    [0112] For example, among the plurality of first vanes 124, a curvature of the vane positioned at a relatively lower side may be greater than a curvature of a vane positioned at relatively an upper side. At this time, among the plurality of first vanes 124, a position of the other end opposite to the one end of the vane positioned at relatively the lower side may be the same as or lower than the one end, and a position of the other end opposite to the one end of the vane positioned at relatively the upper side may be same as or higher than the one end.

    [0113] Accordingly, the first vane 124 may smoothly guide the air rising from the first flow path 120P to the first slit 120S.

    [0114] A second vane 134 may guide air rising from the second flow path 130P to the second slit 120S. The second vane 134 may be adjacent to the second slit 130S and may be fixed to the inner surface of the second upper body 130. The second vane 134 may have a convex shape upward. The second vane 134 may include a plurality of second vanes 134 spaced apart from each other in the up-down direction. Each of the plurality of second vanes 134 may have one end adjacent to the second slit 130S, and the plurality of second vanes 134 may be spaced apart from each other along the second slit 130S. Each of the plurality of second vanes 134 may have different shapes.

    [0115] For example, among the plurality of second vanes 134, a curvature of the vane positioned at a relatively lower side may be greater than a curvature of a vane located at relatively an upper side. At this time, among the plurality of second vanes 134, a position of the other end opposite to the one end of the vane positioned at relatively the lower side may be the same as or lower than the one end, and a position of the other end opposite to the one end of the vane positioned at relatively the upper side may be same as or higher than the one end.

    [0116] Accordingly, the second vane 134 may smoothly guide the air rising from the second flow path 130P to the second slit 130S.

    [0117] Referring to FIGS. 12 and 13, a damper 210 may be movably coupled to the first upper body 120 and/or the second upper body 130. The damper 210 may protrude from the first upper body 120 and/or the second upper body 130 toward the space 109. For example, the damper 210 may include a first damper 210a and a second damper 210b.

    [0118] The first damper 210a may pass through a first slot 120H and protrude into the space 109, or may pass through the first slot 120H and be inserted into the first upper body 120. The first damper 210a may close the first slot 120H to prevent air flowing through the first flow path 120P from leaking to the outside through the first slot 120H. Here, the first slot 120H may be adjacent to the front end 120F of the first upper body 120 and may be formed to pass through the first boundary surface 121 of the first upper body 120. The first slot 120H may be formed long along the front end 120F of the first upper body 120.

    [0119] For example, the first slot 120H may be parallel to the front end 120F. For another example, the first slot 120H may not be parallel to the front end 120F, and a slope of the first slot 120H with respect to the vertical line may be greater than a slope of the front end 120F. Meanwhile, the first slot 120H may be referred to as a first board slit.

    [0120] The second damper 210b may pass through a second slot 130H and protrude into the space 109, or may pass through the second slot 130H and be inserted into the second upper body 130. The second damper 210b may close the second slot 130H to prevent air flowing through the second flow path 130P from leaking to the outside through the second slot 130H. Here, the second slot 130H may be adjacent to the front end 130F of the second upper body 130 and may be formed to pass through the second boundary surface 131 of the second upper body 130. The second slot 130H may be formed long along the front end 130F of the second upper body 130.

    [0121] For example, the second slot 130H may be parallel to the front end 130F. For another example, the second slot 130H may not be parallel to the front end 130F, and a slope of the second slot 130H with respect to the vertical line may be greater than a slope of the front end 130F. Meanwhile, the second slot 130H may be referred to as a second board slit.

    [0122] The first slot 120H and the second slot 130H may face each other, and the first damper 210a and the second damper 210b may come into contact with each other or be spaced apart from each other.

    [0123] Accordingly, when the first damper 210a and the second damper 210b are located at the space 109, the first damper 210a and the second damper 210b may cover at least a part of the front of the space 109 or closed.

    [0124] Referring to FIG. 14, a distance D between the front end 120F and the first slot 120H of the first upper body 120 may be the same as a distance D between the front end 130F and the second slot 130H of the second upper body 130.

    [0125] The first boundary surface 121 of the first upper body 120 and the second boundary surface 131 of the second upper body 130 may face each other and may form left and right boundaries of the space 109. The first boundary surface 121 of the first upper body 120 may be convex to the right, and the second boundary surface 131 of the second upper body 130 may be convex to the left. In other words, a gap between the first boundary surface 121 of the first upper body 120 and the second boundary surface 131 of the second upper body 130 may decrease from the rear to the front and then increase again. Meanwhile, the gap may be a width of the space 109.

    [0126] A first gap B1 may be defined as a gap between the front end 120F of the first upper body 120 and the front end 130F of the second upper body 130.

    [0127] A second gap B2 may be defined as a gap between the rear end 120R of the first upper body 120 and the rear end 120R of the second upper body 130. For example, the second gap B2 may be the same as or different from the first gap B1. A reference gap B0 may be a minimum of the gaps between the first boundary surface 121 of the first upper body 120 and the second boundary surface 131 of the second upper body 130. For example, the reference gap B0 may be 20 to 30 mm.

    [0128] For one example, in the front-rear direction, a gap between a center of the first boundary surface 121 of the first upper body 120 and a center of the second boundary surface 131 of the second upper body 130 may be the reference gap B0. For another example, in the front-rear direction, a gap between a part positioned in front of the center of the first boundary surface 121 of the first upper body 120 and a part positioned in front of the center of the second boundary surface 131 of the second upper body 130 may be the reference gap B0. For the other example, in the front-rear direction, a gap between a part positioned behind the center of the first boundary surface 121 of the first upper body 120 and a part positioned behind the center of the second boundary surface 131 of the second upper body 130 may be the reference gap B0.

    [0129] In this case, a width of a rear part of the space 109 may be the second gap B2, a width of a center part of the space 109 may be the reference gap B0, and a width of the space 109 may decrease from the rear part to the central part. And, a width of a front part of the space 109 may be the first gap B1, and the width of the space 109 may increase from the center part toward the front part.

    [0130] Referring to FIGS. 15 and 16, a damper assembly 200 including the damper 210 may be installed on the upper bodies 120 and 130. The damper assembly 200 may include a first damper assembly 200a installed on the first upper body 120 and having a first damper 210a, and may include a second damper assembly 200b (not shown) installed on the second upper body 130 and having a second damper 210b. The first damper assembly 200a and the second damper assembly 200b may be symmetrical to each other in the left-right direction. Meanwhile, the damper assembly 200 may be referred to as an air flow converter.

    [0131] The damper assembly 200 may include the above-described damper 210 and guide 240. The damper 210 may be formed to be flat or curved. For example, the damper 210 may be a convex plate outwardly. In this case, the damper 210 may extend while drawing an arc of a constant curvature with respect to a center positioned inside an inner surface 211. A front end 210F of the damper 210 may pass through the aforementioned slots 120H and 130H. The guide 240 may be coupled to an outer surface 212 of the damper 210 to guide the movement of the damper 210. For example, the guide 240 may include a first guide 240a and a second guide 240b separated from each other in the up-down direction and having a same configuration.

    [0132] Meanwhile, the damper 210 may be referred to as a board, and the guide 240 may be referred to as a board guide.

    [0133] Referring to FIGS. 17 to 19, the damper assembly 200 may include a motor 220, a power transmission member 230, a light emitting member 250, and a motor mount 260 in addition to the damper 210 and the guide 240 described above. At this time, the motor 220, the power transmission member 230, the light emitting member 250, and the motor mount 260 may be connected or coupled to each of the first guide 240a and the second guide 240b described above.

    [0134] The motor 220 may provide rotational force. The motor 220 may be an electric motor capable of adjusting a rotation direction, a rotation speed, and a rotation angle. The motor 220 may be fixed or coupled to the motor mount 260. For example, the motor mount 260 may be fixed to the inner surfaces of the upper bodies 120 and 130 and coupled to a lower side of the motor 220 to support the motor 220.

    [0135] The power transmission member 230 may include a pinion 231 and a rack 232. The pinion 231 may be fixed to a rotation shaft of the motor 220 and may rotate together with the rotation shaft. The rack 232 may engage the pinion 231. The rack 232 may be fixed or coupled to an inner surface 211 of the damper 210. For example, the rack 232 may have a shape corresponding to a shape of the damper 210. In other words, the rack 232 may extend by drawing an arc with a curvature equal to or greater than a curvature of the damper 210, and a gear-tooth engaged the pinion 231 may face the inner space of the upper bodies 120 and 130.

    [0136] Accordingly, driving force of the motor 220 may be transmitted to the damper 210 through the power transmission member 230, so that the damper 210 may move along a circumferential direction of the damper 210. Meanwhile, the damper 210 may include a transparent material, and the light emitting member 250 may be coupled to the damper 210 to provide light. For example, the light emitting member 250 may be a LED. In this case, whether or not the light emitting member 250 is operated or light emission color may be adjusted in response to a movement of the damper 210.

    [0137] Meanwhile, the guide 240 may include a moving guide 242, a fixed guide 244, and a friction reducing member 246.

    [0138] The movement guide 242 may be coupled to the damper 210 and/or the rack 232 and may move together with the damper 210 and the rack 232. For example, the moving guide 242 may be fixed to an outer surface 212 of the damper 210 and may be extended while drawing an arc with a curvature equal to or less than the curvature of the damper 210. At this time, a length of the moving guide 242 may be smaller than a length of the damper 210.

    [0139] The fixed guide 244 may be coupled to the moving guide 242 at an outside of the moving guide 242 to support the moving guide 242. In this case, the moving guide 242 may be disposed between the damper 210 and the fixed guide 244.

    [0140] A guide groove 245 may be formed at an inner surface of the fixed guide 244, and the moving guide 242 may be movably inserted into the guide groove 245. For example, the guide groove 245 may be formed by drawing an arc with a curvature equal to the curvature of the moving guide 242, and a length of the guide groove 245 may be greater than the length of the moving guide 242. In this case, one end 245a of the guide groove 245 may limit rotation or movement of the moving guide 242 in a first direction. Here, the first direction may be a direction in which the damper 210 protrudes toward the space 109. In addition, the other end 245b of the guide groove 245 may limit rotation or movement of the moving guide 242 in a second direction. Here, the second direction, as a direction opposite to the first direction, may be opposite to a direction in which the damper 210 protrudes toward the space 109.

    [0141] The friction reducing member 246 may reduce friction due to the movement of the moving guide 242 with respect to the fixed guide 244. For example, the friction reducing member 246 may be a roller that is rotatably provided with respect to a central axis parallel in the up-down direction. The friction reducing member 246 may be coupled to the moving guide 242, and at least a part of the friction reducing member 246 may protrude in a radial direction of the moving guide 242 to be movably coupled to the fixed guide 244. For example, the friction reducing member 246 may have elasticity force and may be supported by the fixed guide 244. For example, the friction reducing member 246 may include a first friction reducing member 246a coupled to one side of the moving guide 242 and a second friction reducing member 246b coupled to the other side.

    [0142] Accordingly, the guide 240 may minimize friction or operational noise caused by the movement of the damper 210 and the moving guide 242 while guiding rotation or movement of the damper 210 and the moving guide 242.

    [0143] Referring to FIGS. 20 and 21, a first discharge body SL may be provided at a rear part of the first upper body 120 and may provide a first opening SL-0. A second discharge body SR may be provided at a rear part of the second upper body 130 and may provide a second opening SR-0. The first opening SL-0 and the second opening SR-0 may face each other. For example, the first opening SL-0 may be formed by inclining or bending toward a front of the second opening SR-0. For example, the second opening SR-0 may be formed by inclining or bending toward a front of the first opening SL-0.

    [0144] The first discharge body SL may include a first part 125 and a second part 126. The first part 125 and the second part 126 may be spaced apart from each other, and the first opening SL-0 may be formed between the first part 125 and the second part 126. The space 109 may communicate with the first flow path 120P through the first opening SL-0. And, an outlet end of the first opening SL-0 may be provided as the first slit 120S. At this time, an inlet end of the first opening SL-0 may be located at the first flow path 120P.

    [0145] In this case, a first border 120Sa may form a front boundary of the first slit 120S, a second border 120Sb may form a rear boundary of the first slit 120S, a third border 120Sc may form an upper boundary of the first slit 120S, and a fourth border 120Sd may form a lower boundary of the first slit 120S. Meanwhile, the first opening SL-0 may be referred to as a first channel.

    [0146] The first part 125 may be provided at a part that forms the first boundary surface 121 of the first upper body 120. The first part 125 may be bent and extended from the first boundary surface 121 toward the first flow path 120P. In this case, a cross section 125a of the first part 125 may have a shape bent by approximately 90 degrees from the first boundary surface 121.

    [0147] The second part 126 may be provided at a part that forms the first boundary surface 121 of the first upper body 120. The second part 126 may be positioned behind the first part 125. The second part 126 may form the rear end 120R of the first upper body 120. The second part 126 may form a part of the first boundary surface 121. The second part 126 may protrude from the first boundary surface 121 toward the first flow path 120P. In other words, a thickness of the second part 126 may increase toward the rear. In this case, a cross-section 126a of the second part 126 may approximatively have a wedge shape, and a part of the second part 126 may be coupled to a part that form the first outer surface 122 of the first upper body 120.

    [0148] The first opening SL-0 may be formed between an outer surface 125b of the first part 125 and an inner surface 126b of the second part 126. The outer surface 125b of the first part 125 may have a first curvature greater than a curvature of the first boundary surface 121. An inner surface 126b of the second part 126 may have a second curvature greater than a curvature of the first boundary surface 121. At this time, the first curvature may be greater than the second curvature. And, a center of the curvature of the outer surface 125b and a center of the curvature of the inner surface 126b may be positioned at the first flow path 120P. And, the center of the curvature of the outer surface 125b may be positioned in front of a right side of the center of the curvature of the inner surface 126b. Meanwhile, the outer surface 125b of the first part 125 may be referred to as a first discharge surface, and the inner surface 126b of the second part 126 may be referred to as a second discharge surface.

    [0149] A first gap 120Ga may be defined as a gap between one side of the inner surface 126b and one side of the outer surface 125b. A second gap 120Gb may be defined as a gap between the other side of the inner surface 126b and the outer surface 125b closest to the other side of the inner surface 126b. A third gap 120Gc may be defined as a gap between the other side of the inner surface 126b and the other side of the outer surface 125b. At this time, the other side of the inner surface 126b may be provided as a second border 120Sb forming a rear boundary of the first slit 120S, and the other side of the outer surface 125b may be provided as a first border 120Sa forming a front boundary of the first slit 120S.

    [0150] In this case, the first gap 120Ga may mean a gap of an inlet end of the first opening SL-0, the second gap 120Gb may mean a minimum gap between the inlet end and an outlet end of the first opening SL-0, and a third gap 120Gc may mean a gap of the outlet end of the first opening SL-0. And, the third gap120Gc may mean a width or gap of the first slit 120S. In addition, the second gap 120Gb may be smaller than the first gap 120Ga, and the third gap 120Gc may be larger than the second gap 120Gb.

    [0151] Accordingly, the width or gap of the first opening SL-0 may decrease from an inlet to an outlet of the first opening SL-0 and then increase again. At this time, a section in which the width or gap of the first opening SL-0 is reduced may be referred to as a tapered section or a converging section.

    [0152] And, air accelerated while passing through the tapered section may be smoothly guided to the first boundary surface 121 along the outer surface 125b of the first part 125. That is, a flow direction of the air discharged from the first flow path 120P to the space 109 may be smoothly switched from a rear direction to a front direction through the first opening SL-0.

    [0153] The second discharge body SR may include a first part 135 and a second part 136. The first part 135 and the second part 136 may be spaced apart from each other, and the second opening SR-0 may be formed between the first part 135 and the second part 136. The space 109 may communicate with the second flow path 130P through the second opening SR-0. And, an outlet end of the second opening SR-0 may be provided as the second slit 130S. At this time, an inlet end of the second opening SR-0 may be positioned at the second flow path 130P.

    [0154] In this case, a first border 130Sa may form a front boundary of the second slit 130S, a second border 130Sb may form a rear boundary of the second slit 130S, a third border 130Sc may form an upper boundary of the second slit 130S, and a fourth border 130Sd may form a lower boundary of the second slit 130S. Meanwhile, the second opening SR-0 may be referred to as a second channel.

    [0155] The first part 135 may be provided at a part that forms the second boundary surface 131 of the second upper body 130. The first part 135 may be bent and extended from the second boundary surface 131 toward the second flow path 130P. In this case, a cross section 135a of the first part 135 may have a shape bent by approximately 90 degrees from the second boundary surface 131.

    [0156] The second part 136 may be provided at a part that forms the second boundary surface 131 of the second upper body 130. The second part 136 may be positioned behind the first part 135. The second part 136 may form the rear end 130R of the second upper body 130. The second part 136 may form a part of the second boundary surface 131. The second part 136 may protrude from the second boundary surface 131 toward the second flow path 130P. In other words, a thickness of the second part 136 may increase toward the rear. In this case, a cross-section 136a of the second part 136 may approximatively have a wedge shape, and a part of the second part 136 may be coupled to a part that form the second outer surface 132 of the second upper body 130.

    [0157] The second opening SR-0 may be formed between an outer surface 135b of the first part 135 and an inner surface 136b of the second part 136. The outer surface 135b of the first part 135 may have a first curvature greater than a curvature of the second boundary surface 131. An inner surface 136b of the second part 136 may have a second curvature greater than a curvature of the second boundary surface 131. At this time, the first curvature may be greater than the second curvature. And, a center of the curvature of the outer surface 135b and a center of the curvature of the inner surface 136b may be positioned at the second flow path 130P. And, the center of the curvature of the outer surface 135b may be positioned in front of a left side of the center of the curvature of the inner surface 136b. Meanwhile, the outer surface 135b of the first part 135 may be referred to as a first discharge surface, and the inner surface 136b of the second part 136 may be referred to as a second discharge surface.

    [0158] A first gap 130Ga may be defined as a gap between one side of the inner surface 136b and one side of the outer surface 135b. A second gap 130Gb may be defined as a gap between the other side of the inner surface 136b and the outer surface 135b closest to the other side of the inner surface 136b. A third gap 130Gc may be defined as a gap between the other side of the inner surface 136b and the other side of the outer surface 135b. At this time, the other side of the inner surface 136b may be provided as a second border 130Sb forming a rear boundary of the second slit 130S, and the other side of the outer surface 135b may be provided as a first border 130Sa forming a front boundary of the second slit 130S.

    [0159] In this case, the first gap 130Ga may mean a gap of an inlet end of the second opening SR-0, the second gap 130Gb may mean a minimum gap between the inlet end and an outlet end of the second opening SR-0, and a third gap 130Gc may mean a gap of the outlet end of the second opening SR-0. And, the third gap 120Gc may mean a width or gap of the first slit 120S. In addition, the second gap 130Gb may be smaller than the first gap 130Ga, and the third gap 130Gc may be larger than the second gap 130Gb.

    [0160] Accordingly, the width or gap of the second opening SR-0 may decrease from an inlet to an outlet of the second opening SR-0 and then increase again. At this time, a section in which the width or gap of the second opening SR-0 is reduced may be referred to as a tapered section or a converging section.

    [0161] And, air accelerated while passing through the tapered section may be smoothly guided to the second boundary surface 131 along the outer surface 135b of the first part 135. That is, a flow direction of the air discharged from the second flow path 130P to the space 109 may be smoothly switched from a rear direction to a front direction through the second opening SR-0.

    [0162] Accordingly, a part of the air flowing by the fan 150 (see FIG. 11) may be discharged to the space 109 through the first slit 120S, the rest of the air may be discharged to the space 109 through the second slit 130S, and so air may be mixed in the space 109. And, due to the coanda effect, the air discharged to the space 109 may flow forward along the first boundary surface 121 of the first upper body 120 and the second boundary surface 131 of the second upper body 130.

    [0163] Referring to FIGS. 22 and 23, in a first state of the blower 100, a front end 210F of the damper 210 may be inserted or hidden in the slots 120H and 130H. In this case, the front end 210F of the damper 210 may form a continuous surface on the boundary surfaces 121, 131.

    [0164] Accordingly, air discharged to the space 109 in response to the operation of the fan 150 (see FIG. 11) may flow forward along the boundary surfaces 121, 131 of the upper bodies 120,130. At this time, air flowing forward may be dispersed the left and right along the curvature of the boundary surfaces 121,131. And, such a flow of air may form airflow in which air around the upper bodies 120,130 entrained into the space 109 or flowing forward along the outer surfaces 122,132. As a result, the blower 100 may provide airflow with rich volume to a user or the like.

    [0165] Referring to FIGS. 24 and 25, in a second state of the blower 100, a part of the first damper 210a may pass through the first slot 120H and may be positioned in the space 109, and a part of the second damper 210b may pass through the second slot 130H and may be positioned in the space 109. In this case, a front end 210F of the first damper 210a and a front end 210F of the second damper 210b may be contact in with each other.

    [0166] Accordingly, air discharged to the space 109 in response to the operation of the fan 150 (see FIG. 11) may flow forward along the boundary surfaces 121,131 of the upper bodies 120, 130, and may rise upward blocked by the first damper 210a and the second damper 210b.

    [0167] Meanwhile, the damper 210 may control a wind direction of air discharged from the blower 100 by adjusting a length of the damper 210 protruding from the slot 120H or a position of the front end 210F of the damper 210 with respect to a reference line L' extending in the front and rear direction.

    [0168] Referring to FIGS. 26 and 27, in the first state of the blower 100, a change in a width of discharge airflow of the blower 100 according to a discharge angle (theta A, see FIG. 14) may be confirmed. Here, the discharge angle (theta A) may be defined as an angle between a tangent to the front end 120F of the first upper body 120 or the front end 130F of the second upper body 130 and a reference line L-L' extending in the front and rear direction. And, the width of the discharge airflow, as a left and right width of airflow discharged forward from the blower 100, may be the left and right width of airflow measured or secured at a position spaced from the blower 100 forward by a predetermined distance.

    [0169] It may be confirmed that as the discharge angle (theta A) decreases, the width of discharge airflow decreases, and as the discharge angle (theta A) increases, the width of the discharge airflow increases. However, in a range in which the discharge angle (theta A) exceeds 30 degrees, it may be confirmed that the width of discharge airflow decreases again as the discharge angle (theta) increases. Accordingly, it may be desirable to set the discharge angle (theta A) from 20 degrees to 25 degrees.

    [0170] In accordance with an aspect of the present disclosure, provided is a blower including: a fan causing airflow; a lower body forming a lower space therein in which the fan is disposed, and having a suction hole through which air passes; a first upper body positioned above the lower body, and forming a first inner space communicating with the lower space of the lower body; a second upper body positioned above the lower body, and forming a second inner space communicating with the lower space of the lower body, the second upper body is spaced apart from the first upper body; and a space formed between the first upper body and the second upper body, and opened in the front-rear direction, wherein the first upper body comprises a first slit formed through the first upper body such that air in the first inner space is discharged into the space, and the second upper body comprises a second slit formed through the second upper body such that air in the second inner space is discharged into the space.

    [0171] In accordance with another aspect of the present disclosure, the first upper body may include a first boundary surface facing the space, and at which the first slit is formed, the second upper body may include a second boundary surface facing the space, and at which the second slit is formed, and the space may be disposed between the first boundary surface and the second boundary surface.

    [0172] In accordance with another aspect of the present disclosure, each of the first boundary surface and the second boundary surface may be a curved surface, the first upper body may include a first outer surface being opposite to the first boundary surface with respect to the first inner space, and having a curvature greater than a curvature of the first boundary surface, the second upper body may include a second outer surface being opposite to the second boundary surface with respect to the second inner space, and having a curvature greater than a curvature of the second boundary surface, the first boundary surface may be in contact with the first outer surface and form a front end and a rear end of the first upper body, and the second boundary surface may be in contact with the second outer surface and form a front end and a rear end of the second upper body.

    [0173] In accordance with another aspect of the present disclosure, the first upper body may be spaced in a left direction from the second upper body, the first boundary surface may be convex in a right direction, the first outer surface may be convex in the left direction, the second boundary surface may be convex in the left direction, the second outer surface may be convex in the right direction, and a gap between the first boundary surface and the second boundary surface may gradually decrease from a rear of the space to a center of the space, and may gradually increase from the center of the space to a front of the space.

    [0174] In accordance with another aspect of the present disclosure, the first slit may be adjacent to the rear end of the first upper body, and may be formed long along the rear end of the first upper body, the second slit may be adjacent to the rear end of the second upper body, and may be formed long along the rear end of the second upper body.

    [0175] In accordance with another aspect of the present disclosure, the first slit and the second slit may be inclined at a first angle with respect to a vertical line, and the rear end of the first upper body and the rear end of the second upper body may be inclined at a second angle less than the first angle with respect to the vertical line.

    [0176] In accordance with another aspect of the present disclosure, the blower may further comprise a first opening being adjacent to a rear side of the first boundary surface, and having an inlet end positioned in the first inner space and an outlet end forming the first slit, and a second opening being adjacent to a rear side of the second boundary surface, and having an inlet end positioned in the second inner space and an outlet end having the second slit.

    [0177] In accordance with another aspect of the present disclosure, the first opening may be formed to be inclined or bent toward a front of the second opening, the second opening may be formed to be inclined or bent toward a front of the first opening, and the second slit may face the first slit.

    [0178] In accordance with another aspect of the present disclosure, the first inner space may form a first flow path through which air discharged from the fan flows, the second inner space may form a second flow path through which air discharged from the fan flows, the first upper body may further include a first inner sleeve being coupled to an inner surface of the first upper body and defining a boundary of the first flow path, the second upper body may further include a second inner sleeve being coupled to an inner surface of the second upper body and defining a boundary of the second flow path.

    [0179] In accordance with another aspect of the present disclosure, the first opening may be formed between one end and other end of the first inner sleeve, the second opening may be formed between one end and other end of the second inner sleeve, and the second inner sleeve may be symmetrical to the first inner sleeve in the left-right direction.

    [0180] In accordance with another aspect of the present disclosure, the one end of the first inner sleeve may be positioned in front of the other end of the first inner sleeve, and the first inner sleeve may further include a first discharge portion extending from a center of the space at an acute angle with respect to a reference line extending in the front-rear direction, and forming the one end of the first inner sleeve, and a second discharge portion facing the first discharge portion, and forming the other end of the first inner sleeve.

    [0181] In accordance with another aspect of the present disclosure, the first opening may include a tapered section at which a gap between the first discharge portion and the second discharge portion gradually decreases at a flow direction of air passing through the first opening.

    [0182] In accordance with another aspect of the present disclosure, the first discharge portion may further include a first curved surface facing the first opening, and extending and forming an arc at a constant curvature with respect to a center of curvature positioned in front of the first discharge portion, the second discharge portion may further include a second discharge surface facing the first opening, and extending and forming an arc at a constant curvature with respect to a center of curvature positioned in front of the second discharge portion, a curvature of the first curved surface may be greater than a curvature of the second discharge surface, and the tapered section may be formed between the first curved surface and the second discharge surface.

    [0183] In accordance with another aspect of the present disclosure, the first discharge portion may further include a second curved surface facing the first opening, being connected to the first curved surface, and extending and forming an arc at a constant curvature with respect to a center of curvature positioned in front of the first discharge portion, a curvature of the second curved surface may be the same as the curvature of the second discharge surface, the inlet end of the first opening may be formed between the first curved surface and the second discharge surface, and the outlet end of the first opening may be formed between the second curved surface and the second discharge surface.

    [0184] In accordance with another aspect of the present disclosure, the first opening may further include a curved section being connected to the tapered section, and having a constant gap between the first discharge portion and the second discharge portion.

    [0185] In accordance with another aspect of the present disclosure, the first upper body may further include a first discharge body being disposed at a rear part of the first upper body and having the first opening, the second upper body may further include a second discharge body being disposed at a rear part of the second upper body and having a first part and a second part spaced apart from each other, wherein the first part and the second part define a boundary of the second opening, and the second discharge body may be symmetrical to the first discharge body in the left-right direction.

    [0186] In accordance with another aspect of the present disclosure, the first discharge body may further include a first part bent and extended from the first boundary surface toward the first inner space, and a second part spaced forward from the first part, and forming a part of the first boundary surface, and the first opening may be formed between the first part and the second part.

    [0187] In accordance with another aspect of the present disclosure, the first part may further includes a first discharge surface facing the first opening, and extending and forming an arc at a constant curvature, the second part may further include a second discharge surface facing the first opening, and extending and forming an arc at a constant curvature, and a curvature of the first discharge surface may be larger than a curvature of the second discharge surface.

    [0188] In accordance with another aspect of the present disclosure, the first opening may include a tapered section at which a gap between the first discharge surface and the second discharge surface gradually decreases at a flow direction of air passing through the first opening.

    [0189] In accordance with another aspect of the present disclosure, the inlet end of the first opening may be formed between one side of the first discharge surface and one side of the second discharge surface, the outlet end of the first opening may be formed between other side of the first discharge surface and other side of the second discharge surface, and a minimum gap between the first discharge surface and the second discharge surface may be formed between a point between one side and the other side of the first discharge surface, the other side of the second discharge surface.

    [0190] The effect of the blower according to the present disclosure will be described as follows.

    [0191] According to at least one of the embodiments of the present disclosure, the blower capable of blowing air using the coanda effect may be provided.

    [0192] According to at least one of the embodiments of the present disclosure, air discharged from the slit formed at the rear part of the blower may be smoothly guided forward, thereby minimizing air volume loss or noise generation due to airflow.

    [0193] According to at least one of the embodiments of the present disclosure, the blower capable of forming airflow blown in a wide range may be provided.

    [0194] According to at least one of the embodiments of the present disclosure, the blower capable of forming various airflow such as diffused wind or rising wind may be provided.

    [0195] Certain embodiments or other embodiments of the disclosure described above are not mutually exclusive or distinct from each other. Any or all elements of the embodiments of the disclosure described above may be combined or combined with each other in configuration or function.

    [0196] For example, a configuration "A" described in one embodiment of the disclosure and the drawings and a configuration "B" described in another embodiment of the disclosure and the drawings may be combined with each other. Namely, although the combination between the configurations is not directly described, the combination is possible except in the case where it is described that the combination is impossible.

    [0197] Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.


    Claims

    1. A blower (1) comprising:

    a fan (50) causing airflow;

    a lower body (10) forming a lower space therein in which the fan (50) is disposed, and having a suction hole (12) through which air passes;

    a first upper tower (20) positioned above the lower body (10), and forming a first inner space communicating with the lower space of the lower body (10);

    a second upper tower (30) positioned above the lower body (10), and forming a second inner space communicating with the lower space of the lower body (10), wherein the second upper tower (30) is spaced apart from the first upper tower (20); and

    a space (9) formed between the first upper tower (20) and the second upper tower (30), and opened in a front-rear direction,

    wherein the first upper tower (20) comprises a first slit (20S) formed through the first upper tower (20) and configured such that air in the first inner space is discharged into the space (9), and

    wherein the second upper tower (30) comprises a second slit (30S) formed through the second upper tower (30) and configured such that air in the second inner space is discharged into the space (9),

    wherein the first upper tower (20) comprises a first boundary surface (21) facing the space (9), and at which the first slit (20S) is formed,

    wherein the second upper tower (30) comprises a second boundary surface (31) facing the space (9), and at which the second slit (30S) is formed, and

    wherein the space (9) is disposed between the first boundary surface (21) and the second boundary surface (31),

    wherein the first upper tower includes a first opening (L-O) being adjacent to a rear side of the first boundary surface (21), and having an inlet end positioned in the first inner space and an outlet end forming the first slit (20S),

    wherein the second upper tower includes a second (R-O) opening being adjacent to a rear side of the second boundary surface (31), and having an inlet end positioned in the second inner space and an outlet end having the second slit (30S),

    wherein the first opening (L-O) is formed to be inclined or bent toward a front of the second opening,

    wherein the second opening (R-O) is formed to be inclined or bent toward a front of the first opening, and

    wherein the second slit (30S) faces the first slit (20S),

    wherein the first inner space forms a first flow path (20P) through which air discharged from the fan (50) flows,

    wherein the second inner space forms a second flow path (30P) through which air discharged from the fan (50) flows,

    characterized in that

    the first upper body (20) further comprises a first inner sleeve (25, 26) being coupled to an inner surface of the first upper tower (20) and defining a boundary of the first flow path (20P),

    wherein the second upper body (30) further comprises a second inner sleeve (35, 36) being coupled to an inner surface of the second upper tower (30) and defining a boundary of the second flow path (30P,

    wherein the first opening (L-O) is formed between one end and an other end of the first inner sleeve (25, 26),

    wherein the second opening (R-O) is formed between one end and an other end of the second inner sleeve (35, 36), and

    wherein the second inner sleeve (35, 36) is symmetrical to the first inner sleeve (25, 26) in the left-right direction.


     
    2. The blower according to claim 1, wherein each of the first boundary surface (21) and the second boundary surface (31) is a curved surface,

    wherein the first upper tower (20) comprises a first outer surface (22) being opposite to the first boundary surface (21) with respect to the first inner space, and having a curvature greater than a curvature of the first boundary surface (21),

    wherein the second upper tower (30) comprises a second outer surface (32) being opposite to the second boundary surface (31) with respect to the second inner space, and having a curvature greater than a curvature of the second boundary surface (31),

    wherein the first boundary surface (21) is in contact with the first outer surface (22) and forms a front end and a rear end of the first upper tower (20), and

    wherein the second boundary surface (31) is in contact with the second outer surface (32) and forms a front end and a rear end of the second upper tower (30).


     
    3. The blower according to claim 2, wherein the first upper tower (20) is spaced in a left direction from the second upper tower (30),

    wherein the first boundary surface (21) is convex in a right direction,

    wherein the first outer surface (22) is convex in the left direction,

    wherein the second boundary surface (31) is convex in the left direction,

    wherein the second outer surface (32) is convex in the right direction, and

    wherein a gap between the first boundary surface (21) and the second boundary surface (31) gradually decreases from a rear of the space (9) to a center of the space (9), and gradually increases from the center of the space (9) to a front of the space (9).


     
    4. The blower according to claim 2 or 3, wherein the first slit (20S) is adjacent to the rear end of the first upper body (20), and is formed long along the rear end of the first upper tower (20), and
    wherein the second slit (30S) is adjacent to the rear end of the second upper tower (30), and is formed long along the rear end of the second upper body (30).
     
    5. The blower according to any one of claims 1-4, wherein the one end of the first inner sleeve (25, 26) is positioned in front of the other end of the first inner sleeve (25, 26), and
    wherein the first inner sleeve (25, 26) further comprises:

    a first discharge portion (25b, 25c) extending from a center of the space (9) at an acute angle with respect to a reference line (L) extending in the front-rear directions, and forming the one end of the first inner sleeve (25, 26); and

    a second discharge portion (26c) facing the first discharge portion (25b, 25c), and forming the other end of the first inner sleeve (25, 26).


     
    6. The blower according to claim 5, wherein the first opening (L-O) comprises a tapered section at which a gap between the first discharge portion (25b, 25c) and the second discharge portion (26c) gradually decreases at a flow direction of air passing through the first opening (L-O).
     
    7. The blower according to claim 6, wherein the first discharge portion (35b, 35c) further comprises a first curved surface facing the first opening, and extending and forming an arc at a constant curvature with respect to a center of curvature positioned in front of the first discharge portion (25b, 25c),

    wherein the second discharge portion (26c) further comprises a second discharge surface facing the first opening, and extending and forming an arc at a constant curvature with respect to a center of curvature positioned in front of the second discharge portion (26c),

    wherein a curvature of the first curved surface is greater than a curvature of the second discharge surface, and

    wherein the tapered section is formed between the first curved surface and the second discharge surface.


     
    8. The blower according to claim 7, wherein the first discharge portion (25b, 25c) further comprises a second curved surface facing the first opening, being connected to the first curved surface, and extending and forming an arc at a constant curvature with respect to a center of curvature positioned in front of the first discharge portion (25b, 25c),

    wherein a curvature of the second curved surface is the same as the curvature of the second discharge surface (26c),

    wherein the inlet end of the first opening (L-O) is formed between the first curved surface and the second discharge surface,

    wherein the outlet end of the first opening (L-O) is formed between the second curved surface and the second discharge surface, and

    wherein the first opening (L-O) further comprises a curved section being connected to the tapered section, and having a constant gap between the first discharge portion (25b, 25c) and the second discharge portion (26c).


     


    Ansprüche

    1. Gebläse (1) aufweisend:

    einen Ventilator (50), der einen Luftstrom bewirkt;

    einen unteren Körper (10), der einen unteren Raum darin bildet, in dem der Ventilator (50) angeordnet ist, und der ein Saugloch (12) hat, durch das Luft hindurch strömt;

    einen ersten oberen Turm (20), der oberhalb des unteren Körpers (10) angeordnet ist und einen ersten inneren Raum bildet, der mit dem unteren Raum des unteren Körpers (10) in Verbindung steht;

    einen zweiten oberen Turm (30), der oberhalb des unteren Körpers (10) angeordnet ist und einen zweiten inneren Raum bildet, der mit dem unteren Raum des unteren Körpers (10) in Verbindung steht, wobei der zweite obere Turm (30) von dem ersten oberen Turm (20) beabstandet ist; und

    einen Raum (9), der zwischen dem ersten oberen Turm (20) und dem zweiten oberen Turm (30) gebildet ist und in einer Vorne-Hinten-Richtung geöffnet ist,

    wobei der erste obere Turm (20) einen ersten Schlitz (20S) aufweist, der durch den ersten oberen Turm (20) gebildet ist und derart konfiguriert ist, dass Luft in dem ersten inneren Raum in den Raum (9) ausströmt, und

    wobei der zweite obere Turm (30) einen zweiten Schlitz (30S) aufweist, der durch den zweiten oberen Turm (30) gebildet ist und derart konfiguriert ist, dass Luft in dem zweiten inneren Raum in den Raum (9) ausströmt,

    wobei der erste obere Turm (20) eine dem Raum (9) zugewandte erste Randfläche (21) aufweist, an der der erste Schlitz (20S) gebildet ist,

    wobei der zweite obere Turm (30) eine dem Raum (9) zugewandte zweite Randfläche (31) aufweist, an der der zweite Schlitz (30S) gebildet ist, und

    wobei der Raum (9) zwischen der ersten Randfläche (21) und der zweiten Randfläche (31) angeordnet ist,

    wobei der erste obere Turm eine erste Öffnung (L-O) aufweist, die an eine hintere Seite der ersten Randfläche (21) angrenzt und ein in dem ersten inneren Raum angeordnetes Einlassende und ein den ersten Schlitz (20S) bildendes Auslassende hat,

    wobei der zweite obere Turm eine zweite Öffnung (R-O) aufweist, die an eine hintere Seite der zweiten Randfläche (31) angrenzt und ein in dem zweiten inneren Raum angeordnetes Einlassende und ein den zweiten Schlitz (30S) aufweisendes Auslassende hat,

    wobei die erste Öffnung (L-O) gebildet ist, um hin zu einer Front der zweiten Öffnung geneigt oder gebogen zu sein,

    wobei die zweite Öffnung (R-O) gebildet ist, um hin zu einer Front der ersten Öffnung geneigt oder gebogen zu sein,

    wobei der zweite Schlitz (30S) gegenüber dem ersten Schlitz (20S) angeordnet ist,

    wobei der erste innere Raum einen ersten Strömungspfad (20P) bildet, durch den Luft, die aus dem Ventilator (50) ausströmt, strömt,

    wobei der zweite innere Raum einen zweiten Strömungspfad (30P) bildet, durch den Luft, die aus dem Ventilator (50) ausströmt, strömt,

    dadurch gekennzeichnet, dass

    der erste obere Turm (20) desweiteren eine erste innere Manschette (25, 26) aufweist, die mit einer Innenfläche des ersten oberen Turms (20) gekoppelt ist und einen Rand des ersten Strömungspfads (20P) definiert,

    der zweite obere Turm (30) desweiteren eine zweite innere Manschette (35, 36) aufweist, die mit einer Innenfläche des zweiten oberen Turms (30) gekoppelt ist und einen Rand des zweiten Strömungspfads (30P) definiert,

    wobei die erste Öffnung (L-O) zwischen dem einen und dem anderen Ende der ersten inneren Manschette (25, 26) gebildet ist,

    wobei die zweite Öffnung (R-O) zwischen dem einen und dem anderen Ende der zweiten inneren Manschette (35, 36) gebildet ist, und

    wobei in der Links-Rechts-Richtung die zweite innere Manschette (35, 36) symmetrisch zu der ersten inneren Manschette (25, 26) ist.


     
    2. Gebläse nach Anspruch 1, wobei sowohl die erste Randfläche (21) als auch die zweite Randfläche (31) eine gekrümmte Fläche ist,

    wobei der erste obere Turm (20) eine erste Außenfläche (22) aufweist, die der ersten Randfläche (21) bezüglich des ersten inneren Raums gegenüberliegend ist und eine Krümmung hat, die größer als eine Krümmung der ersten Randfläche (21) ist,

    wobei der zweite obere Turm (30) eine zweite Außenfläche (32) aufweist, die der zweiten Randfläche (31) bezüglich des zweiten inneren Raums gegenüberliegend ist und eine Krümmung hat, die größer als eine Krümmung der zweiten Randfläche (31) ist,

    wobei die erste Randfläche (21) in Kontakt mit der ersten Außenfläche (22) ist und ein vorderes Ende und ein hinteres Ende des ersten oberen Turms (20) bildet, und

    wobei die zweite Randfläche (31) in Kontakt mit der zweiten Außenfläche (32) ist und ein vorderes Ende und ein hinteres Ende des zweiten oberen Turms (30) bildet.


     
    3. Gebläse nach Anspruch 2, wobei der erste obere Turm (20) in einer Linksrichtung von dem zweiten oberen Turm (30) beabstandet ist,

    wobei die erste Randfläche (21) konvex in einer Rechtsrichtung ist,

    wobei die erste Außenfläche (22) konvex in der Linksrichtung ist,

    wobei die zweite Randfläche (31) konvex in der Linksrichtung ist,

    wobei die zweite Außenfläche (32) konvex in der Rechtsrichtung ist, und

    wobei ein Spalt zwischen der ersten Randfläche (21) und der zweiten Randfläche (31) von einem hinteren Bereich des Raums (9) zu einer Mitte des Raums (9) sich allmählich verkleinert und von der Mitte des Raums (9) zu einem vorderen Bereich des Raums (9) sich allmählich vergrößert.


     
    4. Gebläse nach Anspruch 2 oder 3,

    wobei der erste Schlitz (20S) angrenzend an das hintere Ende des ersten oberen Turms (20) ist und entlang des hinteren Endes des ersten oberen Turms (20) lang gebildet ist, und

    wobei der zweite Schlitz (30S) angrenzend an das hintere Ende des zweiten oberen Turms (30) ist und entlang des hinteren Endes des zweiten oberen Turms)(30) lang gebildet ist.


     
    5. Gebläse nach einem der Ansprüche 1 bis 4, wobei das eine Ende der ersten inneren Manschette (25, 26) vor dem anderen Ende der ersten inneren Manschette (25, 26) angeordnet ist, und
    wobei die erste innere Manschette (25, 26) desweiteren aufweist:

    einen ersten Ausströmungsabschnitt (25b, 25c), der sich von einer Mitte des Raums (9) in einem spitzen Winkel bezüglich einer sich in die Vorne-Hinten-Richtung erstreckenden Referenzlinie (L) erstreckt und das eine Ende der ersten inneren Manschette (25, 26) bildet; und

    einen zweiten Ausströmungsabschnitt (26c), der dem ersten Ausströmungsabschnitt (25b, 25c) gegenüberliegt und das andere Ende der ersten inneren Manschette (25, 26) bildet.


     
    6. Gebläse nach Anspruch 5, wobei die erste Öffnung (L-O) einen sich verjüngenden Abschnitt aufweist, an dem ein Spalt zwischen dem ersten Ausströmungsabschnitt (25b, 25c) und dem zweiten Ausströmungsabschnitt (26c) an einer Strömungsrichtung von Luft, die durch die erste Öffnung (L-O) strömt, sich allmählich verkleinert.
     
    7. Gebläse nach Anspruch 6,

    wobei der erste Ausströmungsabschnitt (35b, 35c) desweiteren eine der ersten Öffnung zugewandte erste gekrümmte Fläche aufweist, die einen Bogen mit einer konstanten Krümmung bezüglich eines vor dem ersten Ausströmungsabschnitt (25b, 25c) angeordneten Krümmungszentrums erweitert und bildet,

    wobei der zweite Ausströmungsabschnitt (26c) desweiteren eine der ersten Öffnung zugewandte zweite Ausströmungsfläche aufweist, die einen Bogen mit einer konstanten Krümmung bezüglich eines vor dem zweiten Ausströmungsabschnitt (26c) angeordneten Krümmungszentrums erweitert und bildet,

    wobei eine Krümmung der ersten gekrümmten Fläche größer als eine Krümmung der zweiten Ausströmungsfläche ist, und

    wobei der sich verjüngende Abschnitt zwischen der ersten gekrümmten Fläche und der zweiten Ausströmungsfläche gebildet ist.


     
    8. Gebläse nach Anspruch 7,

    wobei der erste Ausströmungsabschnitt (25b, 25c) desweiteren eine der ersten Öffnung zugewandte zweite gekrümmte Fläche aufweist, die mit der ersten gekrümmten Fläche verbunden ist und einen Bogen mit einer konstanten Krümmung bezüglich eines vor dem ersten Ausströmungsabschnitt (25b, 25c) angeordneten Krümmungszentrums erweitert und bildet,

    wobei eine Krümmung der zweiten gekrümmten Fläche die gleiche ist wie die Krümmung der zweiten Ausströmungsfläche (26c),

    wobei das Einlassende der ersten Öffnung (L-O) zwischen der ersten gekrümmten Fläche und der zweiten Ausströmungsfläche gebildet ist,

    wobei das Auslassende der ersten Öffnung (L-O) zwischen der zweiten gekrümmten Fläche und der zweiten Ausströmungsfläche gebildet ist, und

    wobei die erste Öffnung (L-O) desweiteren einen gekrümmten Abschnitt aufweist, der mit dem sich verjüngenden Abschnitt verbunden ist und einen konstanten Spalt zwischen dem ersten Ausströmungsabschnitt (25b, 25c) und dem zweiten Ausströmungsabschnitt (26c) hat.


     


    Revendications

    1. Soufflante (1), comprenant :

    un ventilateur (50) provoquant une circulation d'air ;

    un corps inférieur (10) formant un espace inférieur en son sein dans lequel est disposé le ventilateur (50), et comportant un trou d'aspiration (12) à travers lequel passe de l'air ;

    une première tour supérieure (20) positionnée au-dessus du corps inférieur (10), et formant un premier espace intérieur communiquant avec l'espace inférieur du corps inférieur (10) ;

    une seconde tour supérieure (30) positionnée au-dessus du corps inférieur (10), et formant un second espace intérieur communiquant avec l'espace inférieur du corps inférieur (10), dans laquelle la seconde tour supérieure (30) est espacée de la première tour supérieure (20) ; et un espace (9) formé entre la première tour supérieure (20) et la seconde tour supérieure (30), et ouvert dans une direction avant-arrière,

    dans laquelle la première tour supérieure (20) comprend une première fente (20S) formée à travers la première tour supérieure (20) et conçue de sorte que de l'air se trouvant dans le premier espace intérieur soit évacué dans l'espace (9), et

    dans laquelle la seconde tour supérieure (30) comprend une seconde fente (30S) formée à travers la seconde tour supérieure (30) et conçue de sorte que de l'air se trouvant dans le second espace intérieur soit évacué dans l'espace (9),

    dans laquelle la première tour supérieure (20) comprend une première surface de délimitation (21) faisant face à l'espace (9), et au niveau de laquelle est formée la première fente (20S),

    dans laquelle la seconde tour supérieure (30) comprend une seconde surface de délimitation (31) faisant face à l'espace (9), et au niveau de laquelle est formée la seconde fente (30S), et

    dans laquelle l'espace (9) est disposé entre la première surface de délimitation (21) et la seconde surface de délimitation (31),

    dans laquelle la première tour supérieure comprend une première ouverture (L-O) qui est adjacent à un côté arrière de la première surface de délimitation (21), et comportant une extrémité d'entrée positionnée dans le premier espace intérieur et une extrémité de sortie formant la première fente (20S),

    dans laquelle la seconde tour supérieure comprend une seconde ouverture (R-O) qui est adjacente à un côté arrière de la seconde surface de délimitation (31), et comportant une extrémité d'entrée positionnée dans le second espace intérieur et une extrémité de sortie comportant la seconde fente (30S),

    dans laquelle la première ouverture (L-O) est formée de façon à être inclinée ou courbée en direction de l'avant de la seconde ouverture,

    dans laquelle la seconde ouverture (R-O) est formée de façon à être inclinée ou courbée en direction de l'avant de la première ouverture, et

    dans laquelle la seconde fente (30S) fait face à la première fente (20S),

    dans laquelle le premier espace intérieur forme un premier trajet de circulation (20P) à travers lequel circule de l'air évacué à partir du ventilateur (50),

    dans laquelle le second espace intérieur forme un second trajet de circulation (30P) à travers lequel circule de l'air évacué à partir du ventilateur (50),

    caractérisée en ce que la première tour supérieure (20) comprend en outre un premier manchon intérieur (25, 26) qui est accouplé à une surface intérieure de la première tour supérieure (20) et qui délimite une délimitation du premier trajet de circulation (20P),

    dans laquelle la seconde tour supérieure (30) comprend en outre un second manchon intérieur (35, 36) qui est accouplé à une surface intérieure de la seconde tour supérieure (30) et qui délimite une délimitation du second trajet de circulation (30P),

    dans laquelle la première ouverture (L-O) est formée entre une extrémité et une autre extrémité du premier manchon intérieur (25, 26),

    dans laquelle la seconde ouverture (R-O) est formée entre une extrémité et une autre extrémité du second manchon intérieur (35, 36), et

    dans laquelle le second manchon intérieur (35, 36) est symétrique au premier manchon intérieur (25, 26) dans la direction gauche-droite.


     
    2. Soufflante selon la revendication 1, dans laquelle chaque surface de la première surface de délimitation (21) et de la seconde surface de délimitation (31) est une surface courbée,

    dans laquelle la première tour supérieure (20) comprend une première surface extérieure (22) qui est opposée à la première surface de délimitation (21) par rapport au premier espace intérieur, et ayant une courbure supérieure à une courbure de la première surface de délimitation (21),

    dans laquelle la seconde tour supérieure (30) comprend une seconde surface extérieure (32) qui est opposée à la seconde surface de délimitation (31) par rapport au second espace intérieur, et ayant une courbure supérieure à une courbure de la seconde surface de délimitation (31),

    dans laquelle la première surface de délimitation (21) est en contact avec la première surface extérieure (22) et forme une extrémité avant et une extrémité arrière de la première tour supérieure (20), et

    dans laquelle la seconde surface de délimitation (31) est en contact avec la seconde surface extérieure (32) et forme une extrémité avant et une extrémité arrière de la seconde tour supérieure (30).


     
    3. Soufflante selon la revendication 2, dans laquelle la première tour supérieure (20) est espacée dans un sens vers la gauche de la seconde tour supérieure (30),

    dans laquelle la première surface de délimitation (21) est convexe dans le sens vers la droite,

    dans laquelle la première surface extérieure (22) est convexe dans le sens vers la gauche,

    dans laquelle la seconde surface de délimitation (31) est convexe dans le sens vers la gauche,

    dans laquelle la seconde surface extérieure (32) est convexe dans le sens vers la droite, et

    dans laquelle un espace entre la première surface de délimitation (21) et la seconde surface de délimitation (31) va en diminuant graduellement de l'arrière de l'espace (9) au centre de l'espace (9), et va en augmentant graduellement du centre de l'espace (9) à l'avant de l'espace (9).


     
    4. Soufflante selon la revendication 2 ou la revendication 3, dans laquelle la première fente (20S) est adjacente à l'extrémité arrière de la première tour supérieure (20), et est formée en longueur le long de l'extrémité arrière de la première tour supérieure (20), et
    dans laquelle la seconde fente (30S) est adjacente à l'extrémité arrière de la seconde tour supérieure (30), et est formée en longueur le long de l'extrémité arrière de la seconde tour supérieure (30).
     
    5. Soufflante selon l'une quelconque des revendications 1 à 4, dans laquelle la première extrémité du premier manchon intérieur (25, 26) est positionnée en face de l'autre extrémité du premier manchon intérieur (25, 26), et
    dans laquelle le premier manchon intérieur (25, 26) comprend en outre :

    une première partie d'évacuation (25b, 25c) s'étendant du centre de l'espace (9) à un angle aigu par rapport à une ligne de référence (L) s'étendant dans les directions avant-arrière, et formant la première extrémité du premier manchon intérieur (25, 26) ; et

    une seconde partie d'évacuation (26c) faisant face à la première partie d'évacuation (25b, 25c), et formant l'autre extrémité du premier manchon intérieur (25, 26).


     
    6. Soufflante selon la revendication 5, dans laquelle la première ouverture (L-O) comprend une section conique au niveau de laquelle un espace entre la première partie d'évacuation (25b, 25c) et la seconde partie d'évacuation (26c) va en diminuant graduellement dans un sens de circulation d'air à travers la première ouverture (L-O) .
     
    7. Soufflante selon la revendication 6, dans laquelle la première partie d'évacuation (35b, 35c) comprend en outre une première surface incurvée faisant face à la première ouverture, et s'étendant et formant un arc à une courbure constante par rapport à un centre de courbure positionné en face de la première partie d'évacuation (25b, 25c),

    dans laquelle la seconde partie d'évacuation (26c) comprend en outre une seconde surface d'évacuation faisant face à la première ouverture, et s'étendant et formant un arc à une courbure constante par rapport à un centre de courbure positionné en face de la seconde partie d'évacuation (26c),

    dans laquelle une courbure de la première surface incurvée est supérieure à une courbure de la seconde surface d'évacuation, et

    dans laquelle la section conique est formée entre la première surface incurvée et la seconde surface d'évacuation.


     
    8. Soufflante selon la revendication 7, dans laquelle la première partie d'évacuation (25b, 25c) comprend en outre une seconde surface incurvée faisant face à la première ouverture, qui est reliée à la première surface incurvée, et qui s'étend et forme un arc à une courbure constante par rapport à un centre de courbure positionné en face de la première partie d'évacuation (25b, 25c),

    dans laquelle une courbure de la seconde surface incurvée est la même que la courbure de la seconde surface d'évacuation (26c),

    dans laquelle l'extrémité d'entrée de la première ouverture (L-O) est formée entre la première surface incurvée et la seconde surface d'évacuation,

    dans laquelle l'extrémité de sortie de la première ouverture (L-O) est formée entre la seconde surface incurvée et la seconde surface d'évacuation, et

    dans laquelle la première ouverture (L-O) comprend en outre une section incurvée qui est reliée à la section conique, et qui comporte un espace constant entre la première partie d'évacuation (25b, 25c) et la seconde partie d'évacuation (26c).


     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description