(19)
(11)EP 3 650 776 A1

(12)EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(43)Date of publication:
13.05.2020 Bulletin 2020/20

(21)Application number: 17916558.4

(22)Date of filing:  21.12.2017
(51)Int. Cl.: 
F24F 13/20  (2006.01)
F24F 13/08  (2006.01)
F24F 1/0011  (2019.01)
F24F 1/0007  (2019.01)
(86)International application number:
PCT/CN2017/117840
(87)International publication number:
WO 2019/007002 (10.01.2019 Gazette  2019/02)
(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
Designated Extension States:
BA ME
Designated Validation States:
MA MD TN

(30)Priority: 05.07.2017 CN 201710545667

(71)Applicants:
  • GD Midea Air-Conditioning Equipment Co., Ltd.
    Foshan, Guangdong 528311 (CN)
  • Midea Group Co., Ltd.
    Foshan, Guangdong 528311 (CN)

(72)Inventors:
  • QIN, Qiang
    Foshan Guangdong 528311 (CN)
  • WANG, Xiansong
    Foshan Guangdong 528311 (CN)
  • CHEN, Xinchang
    Foshan Guangdong 528311 (CN)
  • CUI, Zhenmin
    Foshan Guangdong 528311 (CN)
  • RAO, Tao
    Foshan Guangdong 528311 (CN)

(74)Representative: RGTH 
Patentanwälte PartGmbB Neuer Wall 10
20354 Hamburg
20354 Hamburg (DE)


(56)References cited: : 
  
      


    (54)AIR-CONDITIONER INDOOR UNIT


    (57) Disclosed is an air conditioner indoor unit, which includes: a chassis,an air duct assembly detachably connected with the chassis; a face frame defining an installation opening and a detachment opening configured to detach the air duct assembly; a screen assembly including a screen piece detachably installed on the installation opening and a filter arranged on the screen piece; a first panel configured to open or close the detachment opening, and including an air outlet connected with an air duct formed by the air duct assembly; and a second panel engaged with the first panel and configured to cover a surface of the face frame. The technical solution of the present disclosure can improve the disassembling convenience and facilitate deep cleaning of the air conditioner indoor unit.




    Description

    TECHNICAL FIELD



    [0001] The present disclosure relates to the technical field of air conditioners, in particular to air conditioner indoor unit.

    BACKGROUND



    [0002] With the popularization of air conditioner, users have been increasingly concerned about the health problems caused by air conditioning. Regarding split-type indoor units of air conditioners, indoor air typically is blown back into the room passing in sequence through a filter, an evaporator, a fan wheel, an air duct and the like. If the above parts are not cleaned in time or thoroughly, bacteria and even mildew are easily grown, contaminating the cold air blown out by the air conditioner. However, in the assembly of the related indoor air conditioners, only the front panel covering the filter installation opening can be opened at a certain angle to take out the filter for cleaning. Other components, especially the air duct assembly, cannot be removed and cleaned by the user, due to the assembling complication. This makes the user using these indoor air conditioner suffer from health risks.

    SUMMARY



    [0003] The main purpose of the present disclosure is to provide an air conditioner indoor unit, which aims to improve the disassembly and assembly convenience of the air conditioner indoor unit and facilitate deep cleaning of the air conditioner indoor unit.

    [0004] In order to achieve the above objective, the air conditioner indoor unit provided by the invention including: a chassis, an air duct assembly detachably connected with the chassis; a face frame forming an installation opening and a detachment opening that is configured to allow the air duct assembly to pass through; a grille assembly including a grille member detachably installed at the installation opening and a filter arranged on the grille member; a first panel configured to open or close the detachment opening, and including an air outlet communicated with the air duct assembly; and a second panel configured to cooperate with the first panel to cover a surface of the face frame.

    [0005] Preferably, the first panel is clamped with the face frame.

    [0006] Preferably, the first panel cooperates with the second panel to cover a front side of the face frame, the second panel being positioned above the first panel; and a left end and a right end of the first panel are detachably clamped with the face frame.

    [0007] Preferably, one end of the first panel is rotatably connected with the face frame, and another end of the first panel is movable in a direction away from the face frame.

    [0008] Preferably, an upper end of the second panel is rotatably connected with the face frame, and a lower end of the second panel is movable in a direction away from the face frame.

    [0009] Preferably, the first panel includes a plurality of clamps protrudes from an inner side of the first panel, and the face frame includes a plurality of clamping holes formed at a front side of the face frame and configured to fit with the clamps;

    [0010] Preferably, the face frame includes a plurality of clamps protrudes from a front side of the face frame, and the first panel includes a plurality of clamping holes formed on the inner side surface of the first panel and configured to fit with the clamps.

    [0011] Preferably, the plurality of clamps includes: one or more clamps at the inner side of the left end of the first panel, and one or more clamps at the inner side of the right end of the first panel.

    [0012] Preferably, the plurality of the clamps includes: two first clamps oppositely arranged at on the inner side of a left end of the first panel and spaced apart from each other, and two first clamps oppositely arranged at the inner side of a right end of the first panel and spaced apart from each other;

    [0013] each of the two fist clamps and the two second clamps comprises a fastening-protruding portion extending along an up-down direction at a free end of the clamps; and the fastening-protruding portions of the two first clamps extend in opposite directions, and the fastening-protruding portions of the two second clamps extend in opposite directions.

    [0014] Preferably, the second panel and the face frame are integrally formed; or the second panel is rotatably connected with the face frame at one end of the second panel, and is openable relatively away from the face frame at another end of the second panel.

    [0015] Preferably, the grille member and the filter are integrally formed.

    [0016] Preferably, the air conditioner indoor unit further includes an air guiding assembly, at the first panel.

    [0017] Preferably, the air duct assembly includes a volute, the volute including: a first sliding protrusion structure at a left end of the volute, and a second sliding protrusion structure at a right end of the volute; the chassis includes: a first side fixing portion arranged at a left end of the chassis, and a second side fixing portion arranged at a right end of the chassis, the first side fixing portions including a first sliding groove structure at a side facing to the second side fixing portions, the second side fixing portions including a second sliding groove structure at a side facing to the first side fixing portions; the first sliding protrusion structure is engaged with the first sliding groove structure, and the second sliding protrusion structure is engaged with the second sliding groove structure.

    [0018] Preferably, the air duct assembly further includes the air duct assembly further includes: a front water receiving plate, and a rear water receiving plate, the front water receiving plate and the rear water receiving plate both formed at an upper part of the volute and integrally formed with the volute.

    [0019] In the technical solution of the air conditioner indoor unit of the invention, n one aspect, since the first panel can be opened relative to the face frame to expose the detachment opening, the air duct assembly detachably connected to the chassis can be conveniently disassembled from the detachment opening. This provides great convenience for deep cleaning of the air duct, the heat exchanger and other related components. In another aspect, since the face frame is provided with an installation opening, and the grille member on which the filter is installed is detachably connected to the installation opening, the filter can also be conveniently disassembled for cleaning. The synergistic action of the aforementioned aspects improves the disassembly and assembly convenience of the air conditioner indoor unit, and facilitates the thorough and deep cleaning of the air conditioner indoor unit. This may bring benefits in reducing the potential health hazard coming from the air conditioner indoor unit.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0020] In order to explain the embodiment of the present disclosure or the technical solution of the prior art more clearly, the following will briefly introduce the drawings necessary in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those ordinary skill in the art, other drawings can be obtained according to the structure shown in these drawings without any creative effort.

    Fig. 1 is an exploded view of an air conditioner indoor unit according to a first embodiment of the present disclosure;

    Fig. 2 is an enlarged schematic view at portion A in Fig. 1;

    Fig. 3 is an enlarged schematic view at position B in Fig. 1;

    Fig. 4 is a schematic structural view of the first panel in Fig. 1;

    Fig. 5 is an enlarged schematic view at portion C in Fig. 4;

    Fig. 6 is an exploded view of an air conditioner indoor unit according to a second embodiment of the present disclosure;

    Fig. 7 is an exploded view of an air conditioner indoor unit according to a third embodiment of the present disclosure;

    Fig. 8 is an exploded view of an air conditioner indoor unit according to a fourth embodiment of the present disclosure.


    Description of reference numerals:



    [0021] 
    Reference NumeralNameReference NumeralName
    1 Chassis 11 Side fixing portion
    111 Connecting portion 112 Sliding groove
    21 Volute 22 Front water receiving tray
    211 Sliding protrusion structure 211a Sliding block
    211b Limiting flange 24 Fan wheel
    25 Fan wheel motor 3 Face frame
    32 Detaching mouth 33 Upper support
    34 Lower frame 35 Side connector
    41 Grille member 5 First panel
    6 Second panel 341 Protruding plate
    36 clamping hole 51 Air outlet
    8 Air guiding assembly 81 Drive motor
    82 Air guiding plate 52 Fastener
    521 Fastening and protruding portion    


    [0022] The implementation, functional features and advantages of the present disclosure will be further described with reference to the accompanying drawings with the embodiments.

    DETAILED DESCRIPTION OF THE EMBODIMENTS



    [0023] As following, the technical solution in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiment of the present disclosure. Obviously, the described embodiment is only a part of the embodiment of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments perceived by those ordinary skills in the art without creative effort should be fallen within the protection scope of the present disclosure.

    [0024] It should be noted that if directional indications (such as up, down, left, right, front, back, etc.) are involved in the embodiments of the present disclosure, the directional indications are only used to explain the relative positional relationship and movement between the components in a certain posture (as shown in the drawings), and if the specific posture changes, the directional indications will change accordingly.

    [0025] In addition, if there are descriptions of "first" and "second" in the embodiments of this application, the descriptions of "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, features defining "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on what one of ordinary skill in the art can achieve. When the combination of technical solutions is contradictory or impossible to achieve, it should be considered that the combination of such technical solutions does not exist and is not within the protection scope required by the present disclosure.

    [0026] The present disclosure provides an air conditioner indoor unit.

    [0027] Referring to Fig. 1, in a first embodiment of the present disclosure, the air conditioner indoor unit is specifically a wall-mounted air conditioner indoor unit. The air conditioning indoor unit comprises a chassis 1, an air duct assembly (not labeled), a face frame 3, a screen assembly (not labeled), a first panel 5 and a second panel 6. The air duct assembly is detachably connected with the chassis 1. The face frame 3 is provided with an installation opening (not labeled) and a detachment opening 32 for disassemble the air duct assembly. The grille assembly includes a grille member 41 detachably mounted on the installation opening and a filter (not shown) provided on the grille member 41. The first panel 5 is configured to open or close the detachment opening 32, and the first panel 5 is provided with an air outlet 51 connected with the air duct fromed by the air duct assembly. The second panel 6 and the first panel 5 are engaged to cover a surface of the face frame 3.

    [0028] It should be appreciated that in the present embodiment, the face frame 3 includes an upper bracket 33, a lower frame 34, and two opposite side connectors 35 located between the upper bracket 33 and the lower frame 34. The installation opening is formed between the upper bracket 33 and the lower frame 34. The detachment opening 32 is formed in the lower frame 34. The grille member 41 is detachably installed at the upper bracket 33. When the air conditioner indoor unit is applied in real practice, air flows through the grid 41, the filter, the heat exchanger (not shown), the air duct assembly and the air outlet 51 in sequence and cooled to blow out.

    [0029] In the present embodiment, in one aspect, since the first panel 5 can be opened relative to the face frame 3 to expose the detachment opening 32, the air duct assembly detachably connected to the chassis 1 can be conveniently disassembled from the detachment opening 32. This provides great convenience for deep cleaning of the air duct, the heat exchanger and other related components. In another aspect, since the face frame 3 is provided with an installation opening, and the grille member 41 on which the filter is installed is detachably connected to the installation opening, the filter can also be conveniently disassembled for cleaning. The synergistic action of the aforementioned aspects improves the disassembly and assembly convenience of the air conditioner indoor unit, and facilitates the thorough and deep cleaning of the air conditioner indoor unit. This may bring benefits in reducing the potential health hazard coming from the air conditioner indoor unit.

    [0030] Referring to Figs. 1 to 5, in the present embodiment, the first panel 5 is optionally detachably fastened with the face frame 3. Specifically, the first panel 5 and the second panel 6 cooperatively cover the front side of the face frame 3, and the second panel 6 is located above the first panel 5. The left and right ends of the first panel 5 are detachably fastened with the face frame 3. Of course, the first panel 5 can be detachably clamped with the face frame 3 at the upper and lower ends or the peripheral edges of the first panel 5. In the present embodiment, the arrangement of the first panel 5 detachably clamped with the face frame 3 at the left and right ends of the first panel 5, can simplify the structure and avoid interference in the disassembly of the air duct assembly.

    [0031] Further, referring to Figs. 2, 4 to 5, in the present embodiment, the inner side of the first panel 5 is protruded with a plurality of fasteners 52, and the front side of the face frame 3 is provided with clamping holes 36 into which the fasteners 52 are fastened. As such, the engagement of the first panel 5 and the face frame 3 can be implemented by fastening the fasteners 52 into the corresponding clamping holes 36. When the first panel 5 needs to be disassembled, it is the fasteners 52 that only need to be separated from the clamping holes 36. Specifically, a plurality of fasteners 52 are provided and are respectively arranged on the inner sides at the left and right ends of the first panel 5. The lower frame 34 is extending inward at its left and right edges to form a protruding plate 341. The protruding plate 341 is provided with clamping holes 36, i.e. the clamping holes 36 are arranged on the left and right sides of the detachment opening 32 to avoid interference to the disassembly of the air duct assembly. In fact, the present disclosure is not limited to the aforementioned arrangement. The fastener 52 may also be provided on the front side of the face frame 3. Accordingly, the clamping hole 36 is provided on the inner side of the first panel 5. In addition, the fastener 52 is not limited to the clamping hole 36, and may be of a structure such as a clamping seat.

    [0032] Specifically, in order to make the structure simpler without influencing the fastening firmness, it is optional that the first panel 5 are respectively provided with two fasteners 52 that are spaced on the inner sides of the left and right ends of the first panel 5. Each of the fasteners 52 includes a fastening and protruding portion 521 extending along an up-down direction at a free end of the fasteners 52, and the fastening and protruding portions 521 at a same end are extending in an opposite direction. As shown in Fig. 5, the two fasteners 52 located on the same side are spaced in the up-down direction. In which, the fastener 52 on the upper side is disposed adjacent to the upper end of the first panel 5, and the fastening and protruding portion 521 is extending upward. While the fastening and protruding portion 521 of the fastener 52 located on the lower side extends downward. As such, when the fastener 52 is inserted into the clamping hole 36, the fastening and protruding portion 521 is abutted against the inner side of the edge of the clamping hole 36, thereby realizing the limit connection in the front-rear direction to the first panel 5. While the arrangement of the fastening and protruding portions 521 of the upper and lower fasteners 52 in opposite extending directions can limit the first panel 5 in the up-down direction.

    [0033] Referring to Figs. 1 and 4, in the present embodiment, the air conditioner indoor unit further includes an air guiding assembly 8 installed on the first panel 5. Specifically, the air guiding assembly 8 includes an air guiding plate 82 and a drive motor 81 for driving the air guiding plate 82 to rotate. The air guiding plate 82 is internally arranged in the air outlet 51, and the left and right ends of the air guiding plate 82 are respectively rotatably connected with the first panel 5, and one end of the air guiding plate 82 is connected with the drive motor 81. The drive motor 81 is fixed to the inner side of the first panel 5 and located at one side of the air outlet 51 in the left-right direction. It can be appreciated that when the first panel 5 is opened relative to the face frame 3 to expose the detachment opening 32, the air guiding assembly 8 installed on the first panel 5 is also opened accordingly. The air guiding assembly 82 and the like can be conveniently cleaned.

    [0034] Referring to Figs. 1 to 3, in the present embodiment, further, the air duct assembly includes a volute 21, the chassis 1 is provided with side fixing portions 11 at the respective left and right ends of the chassis 1. The two opposite sides of the two side fixing portion 11 are respectively provided with sliding groove structures. The volute 21 are respectively provided with sliding convex structures 211 at the left and right ends of the volute 21, to slidably engage with the sliding groove structures. The air duct assembly can slide out of the chassis 1 very conveniently. However, the present disclosure is not limited to the aforementioned arrangement, and the sliding protrusion structures 211 may be respectively provided at the two side fixing portions 11, and correspondingly, the sliding groove structures are provided at the left and right side ends of the volute 21. Specifically, the volute 21 are provided with two side plates at the left and right ends of the volute 21, the outer sides of which is protruded outward to form a sliding block 211a. The periphery of the free end of the sliding block 211a is extended outward along the circumferential direction to form a limiting flange 211b. The inner side of the side fixing part 11 protrudes inwards along the left-right direction to form a connecting part 111, which is provided with a sliding groove 112 with an upper opening and its length extending along the front-back direction. During the sliding-in and sliding-out process of the air duct assembly, the bottom end of the sliding block 211a is in sliding fit with the sliding groove 112, and the inner side of the limiting flange 211b is in sliding fit with the surface of the connecting part 111 facing the fixing part 11 on the other side. Herein, the sliding block 211a is preferably hollow to save material.

    [0035] In addition, the air duct assembly further comprises a front water receiving plate 22 and a rear water receiving plate (not shown), in which the front water receiving plate 22 and the rear water receiving plate are both formed on the upper part of the volute 21 and are integrally formed with the volute 21. It can be appreciated that when the air duct assembly can be detached from the chassis 1, the front water receiving plate 22 and the rear water receiving plate integrated with the volute 21 can also be separated from the chassis 1, thereby facilitating cleaning of these components. In addition, the fan wheel 24 of the air conditioner indoor unit and the fan wheel motor 25 for driving the fan wheel 24 are also arranged at the upper part of the volute 21 and are positioned between the front water receiving plate 22 and the rear water receiving plate. The fan wheel 24 and the fan wheel motor 25 can also be disassembled together with air duct assembly, thus facilitating the maintenance and cleaning of these two components.

    [0036] It should be particularly noted herein that in the first embodiment, the first panel 5 is detachably fastened with the face frame 3. The second panel 6 is fixedly connected with the face frame 3 and is optionally integrally arranged. Additionally, the installation opening of the face frame 3 is extended from the front side of the face frame 3 to the upper bracket 33, and the installation opening at the upper bracket 33 is the air inlet of the air conditioner indoor unit in a normal sense. The grille member 41 is internally provided with the air inlet and detachably clamped with the air inlet. Specifically, the grille member is provided with a plurality of fixing fasteners for clamping with the upper bracket. The fixing fasteners are optionally respectively arranged on the left and right sides of the grille member. The filter is arranged on the grille member 41 and can be detached with the grille member 41. Specifically, the grille member 41 is optionally integrally formed with the filter. In fact, the technical solution of the present disclosure is not limited to the aforementioned arrangement. In the second embodiment shown in Fig. 6, when the first panel 5 is detachably fastened with the face frame 3, the second panel 6 located above the first panel 5 can be rotatably open relative to the face frame 3. Specifically, the upper end of the second panel 6 is rotatably connected with the face frame 3, and the lower end thereof can be open away from the opening of the face frame 3.

    [0037] In addition, in the other two embodiments shown in Fig. 7 and Fig. 8, the opening or closing of the opening 32 of the first panel 5 can also be realized by rotation, i.e., one end of the first panel 5 is rotatably connected with the face frame 3, and the other end can be relatively opened away from the face frame 3. Specifically, in the third embodiment shown in Fig. 7, the upper end of the first panel 5 is rotatably connected with the face frame 3, and the lower end can be opened relatively away from the face frame 3. Additionally, the second panel 6 is fixedly connected with the face frame 3 and is may be optionally arranged of an integral structure. The filter is arranged on the grille member 41 and can be detached along with the grille member 41. While in the fourth embodiment as shown in Fig. 8, it is different from the third embodiment in that the upper end of the second panel 6 is rotatably connected with the face frame 3, and its lower end can be opened relatively away from the face frame 3. It should also be noted that based on the technical solution of the present disclosure, the removal of the filter can be performed before the first panel 5 is opened.

    [0038] The description aforementioned is only the optional embodiment of the present disclosure and is not intended to limit the scope of the present disclosure. Any equivalent structural modification made by using the description and drawings of the present disclosure or direct/indirect application in other related technical fields under the concept of the present disclosure shall be included in the protection scope of the present disclosure.


    Claims

    1. An air conditioner indoor unit, comprising:

    a chassis,

    an air duct assembly detachably connected with the chassis;

    a face frame provided with an installation opening and a detachment opening that is configured to allow the air duct assembly to pass through;

    a grille assembly comprising a grille member detachably mounted at the installation opening and a filter arranged on the grille member ;

    a first panel configured to open or close the detachment opening, and comprising an air outlet communicated with the air duct assembly; and

    a second panel configured to cooperate with the first panel to cover a surface of the face frame .


     
    2. The air conditioner indoor unit of claim 1, wherein:
    the first panel is clamped with the face frame.
     
    3. The air conditioner indoor unit of claim 2, wherein:

    the first panel cooperates with the second panel to cover a front side of the face frame, the second panel being positioned above the first panel; and

    a left end and a right end of the first panelare detachably clamped with the face frame.


     
    4. The air conditioner indoor unit of claim 1, wherein:
    one end of the first panel is rotatably connected with the face frame, and another end of the first panelis movable in a direction away from the face frame .
     
    5. The air conditioner indoor unit of claim 4, wherein:
    an upper end of the second panel is rotatably connected with the face frame , and a lower end of the second panel is movable in a direction away from the face frame.
     
    6. The air conditioner indoor unit of any one claims 2 to 5, wherein:

    the first panel comprises a plurality of clamps protruding from an inner side of the first panel, and the face frame comprises a plurality of clamping holes formed at a front side of the face frame and configured to fit with the clamps; or

    the face frame comprises a plurality of clamps protruding from a front side of the face frame, and the first panel comprises a plurality of clamping holes formed on the inner side surface of the first panel and configured to fit with the clamps.


     
    7. The air conditioner indoor unit of claim 6, wherein:
    the plurality of clamps comprises:

    one or more clamps at the inner side of the left end of the first panel, and

    one or more clamps at the inner side of the right end of the first panel.


     
    8. The air conditioner indoor unit of claim 6, wherein:

    the plurality of the clamps comprises:

    two first clamps oppositely arranged at on the inner side of a left end of the first panel and spaced apart from each other, and

    two first clamps oppositely arranged at the inner side of a right end of the first paneland spaced apart from each other;

    each of the two fist clamps and the two second clamps comprises a fastening-protruding portion extending along an up-down direction at a free end of the clamps; and

    the fastening-protruding portions of the two first clamps extend in opposite directions, and the fastening-protruding portions of the two second clamps extend in opposite directions.


     
    9. The air conditioner indoor unit of claim 1, wherein:

    the second panel and the face frame are integrally formed; or

    the second panel is rotatably connected with the face frame at one end of the second panel, and is openable relatively away from the face frame at another end of the second panel.


     
    10. The air conditioner indoor unit of claim 1, wherein:
    the grille member and the filter are integrally formed.
     
    11. The air conditioner indoor unit of claim 1, further comprising:
    an air guiding assembly at the first panel.
     
    12. The air conditioner indoor unit of any one of claims 1 to 5, wherein:

    the air duct assembly comprises a volute,
    the volute comprising:

    a first sliding protrusion structure at a left end of the volute, and

    a second sliding protrusion structure at a right end of the volute;

    the chassis comprises:

    a first side fixing portion arranged at a left end of the chassis, and

    a second side fixing portion arranged at a right end of the chassis,

    the first side fixing portion comprising a first sliding groove structure at a side facing the second side fixing portion,

    the second side fixing portion comprising a second sliding groove structure at a side facing the first side fixing portions;

    the first sliding protrusion structure is engaged with the first sliding groove structure, and the second sliding protrusion structure is engaged with the second sliding groove structure.


     
    13. The air conditioner indoor unit of claim 12, wherein:
    the air duct assembly further comprises:

    a front water receiving plate, and

    a rear water receiving plate, the front water receiving plate and the rear water receiving plate both formed at an upper part of the volute and integrally formed with the volute.


     




    Drawing