Exhaust hood

Abstract

 An exhaust hood is disclosed. An exhaust hood includes: a hood body 110 having a canopy 111 including an inlet 117, and an exhaust part 121 connected with the canopy 111 and having an exhaust flow path 123 therein; and a nozzle unit 140 installed at a front side of the hood body 110, and having a curved shape portion 141, a first nozzle 143 discharging air from top along a circumferential direction of the curved shape portion 141, and a second nozzle 145 discharging air from bottom along the circumferential direction of the curved shape portion 141 therein.
Accordingly, contaminated air moving toward the front of the exhaust hood can be effectively introduced to the inlet and be collected. In addition, when an auxiliary nozzle unit is additionally provided, contaminated air moving toward the side of the exhaust hood can be effectively introduced and be collected as well. Thus, pleasant cooking and experimental environments can be created. In addition, an extended zone produced by a mixed air current generated by adding air from the first nozzle and the second nozzle to each other blocks hot contaminated air toward the face of a cook to thereby create a pleasant cooking environment.

Description

[0001] The present invention relates to an exhaust hood, and more particularly, to an exhaust hood of which contaminated air collecting efficiency is enhanced.

[0002] In general, an exhaust hood is disposed above a cooker such as a gas range or a laboratory table that generate materials causing air pollution like smoke, smells and grease vapor.

[0003] Figure 1 is a side sectional view that illustrates one example of an exhaust hood according to the conventional art. Referring to Figure 1, the conventional exhaust hood includes a canopy 21 installed above a cooker 10 having a plurality of burners 11 a and 11 b spaced at a predetermined distance therebetween, and an exhaust part 31 communicating with the canopy 21 and upwardly protruding from the canopy 21 to a predetermined height.

[0004] An inlet 23 is formed at the bottom of the canopy 21, through which the polluted air including pollutants like smoke, smells and grease vapor generated from the cooker 10 is drawn in. Also, a grease filter 24 that can collect pollutants is mounted at the inlet 23.

[0005] An exhaust path 33 is formed in the exhaust part 31, through which the polluted air having been introduced through the inlet 23 is exhausted to the outside. An exhaust fan 34 for forcibly taking in the air is installed under the exhaust path 33.

[0006] The polluted air including smoke, smells and grease vapor generated as burners 11 a and 11 b of the cooker heat food items is in a buoyancy jet form and increases in width as it ascends.

[0007] Thusly, only a portion of the polluted air is exhausted to the outside via the grease filter 24 installed at the inlet 23 and the exhaust path 33, and most of the polluted air is moved to the outside along a bottom surface of the canopy 21, contaminating the ambient air. Such a phenomenon greatly occurs when a food item is heated on the burner 11a disposed at the front side of the cooker 10.

[0008] To prevent the phenomenon, a method of increasing a rotation rate of the exhaust fan 34 and thusly increasing an intake force may be used. However, even though the rotation rate of the exhaust fan 34 is increased to increase the intake force, the intake performance is not improved in proportion to the increased rotation force. For this reason, only the intake force of the exhaust fan 34 used in such a method is not enough to guide the polluted air, which is moved to outside along the bottom surface of the canopy 21, to the inlet 23.

[0009] Consequently, the conventional exhaust hood cannot prevent the polluted air from moving out from the canopy 21, polluting an upper region (A) of the front side of the canopy 21 and spreading to a room to thus pollute a surrounding environment.

[0010] In order to solve the aforementioned problems, an exhaust hood illustrated in Figure 2 has been devised.

[0011] Figure 2 is a side sectional view that illustrates another example of a conventional exhaust hood. Referring to Figure 2, the conventional exhaust hood in accordance with another example includes a hood body 51 disposed above a cooker 10 at a predetermined distance therebetween, and a nozzle part 81 installed at a front region of the hood body 51 and downwardly discharging the air.

[0012] The hood body 51 includes a canopy 61 installed above the cooker 10, which has a plurality of burners 11a and 11b, at a predetermined distance therebetween, and an exhaust part 71 communicating with the canopy 61 and upwardly protruding from the canopy 61 to a predetermined height.

[0013] The nozzle part 81 is formed at a front region of a bottom surface of the canopy 61 and discharges the air downwardly. An air supply fan 83 for blowing the air to the nozzle part 81 is installed in the canopy 61.

[0014] A curve shape portion 85 having an arc shaped section which is convex downwardly is formed at a lower side of the front surface of the canopy 61, so that a portion of the air discharged through the nozzle part 81 can flow to a region of the inlet 63 by the so-called coanda effect. By the curved shape portion 85, the polluted air cannot be moved outside the canopy 61 but is guided to the inlet 63.

[0015] In the exhaust hood illustrated in Figure 2, the nozzle part 81 is formed at a spot inwardly spaced apart from the front end of the canopy 61 at a predetermined distance. Thusly, the polluted air having ascended inside the canopy 61 can be guided to the inlet 63 by the air discharged through the nozzle part 81. However, the method does not solve the problem that the polluted air ascending to the front end of the canopy 61 is moved out from the front end of the canopy 61 and pollutes an upper region (B).

[0016] Therefore, an object of the present invention is to provide an exhaust hood of which contaminated air collecting efficiency is enhanced.

[0017] To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an exhaust hood comprising: a hood body 110 having a canopy 111 including an inlet 117, and an exhaust part 121 connected with the canopy 111 and having an exhaust flow path 123 therein; and a nozzle unit 140 installed at a front side of the hood body 110, and having a curved shape portion 141, a first nozzle 143 discharging air from top along a circumferential direction of the curved shape portion 141, and a second nozzle 145 discharging air from bottom along the circumferential direction of the curved shape portion 141 therein.

[0018] The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

[0019] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a unit of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

[0020] In the drawings:

Figure 1 is a side sectional view illustrating on example of an exhaust hood in accordance with a conventional art;

Figure 2 is a side sectional view illustrating another example of the exhaust hood in accordance with the conventional art;

Figure 3 is a perspective view of an exhausted hood in accordance with a first embodiment of the present invention;

Figure 4 is a cross-sectional view taken along line IV-IV of Figure 3;

Figure 5 is an enlarged view of a C portion of Figure 4;

Figure 6 is a perspective view in accordance with a second embodiment of the present invention;

Figure 7 is a cross sectional view taken along line VII-VII of Figure 6;

Figure 8 is a cross-sectional view of an exhaust hood in accordance with a third embodiment of the present invention;

Figure 9 is a perspective view of an exhaust hood in accordance with a fourth embodiment of the present invention;

Figure 10 is a plan view of Figure 9;

Figure 11 is a sectional view taken along line XI-XI; and

Figure 12 is a sectional view taken along line XII-XII of Figure 10.

[0021] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[0022] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0023] Figure 3 is a perspective view of an exhausted hood in accordance with a first embodiment of the present invention, Figure 4 is a cross-sectional view taken along line IV-IV of Figure 3, and Figure 5 is an enlarged view of a C portion of Figure 4.

[0024] With reference to Figures 3 and 4, an exhaust hood in accordance with the first embodiment of the present invention includes a hood body 110 and a nozzle unit 140 that is installed to a front side of the hood body 110. The arrow indicates the air flow.

[0025] The hood body 110 includes a canopy 111 installed above a cooker 10 (refer to Figure 1) having a plurality of burners 11 a and 11 b thereon and separated therefrom at a certain distance, and an exhaust part 121 connected with the canopy 111 and protruding above the canopy 111 at a certain height.

[0026] The canopy 111 has a rectangular platy shape, and includes an inlet 117 taking in air and a grease filter 118 installed at the inlet 117 so as to collect pollutants at its lower surface at a lower surface of the canopy 111.

[0027] The canopy 111 has an air supply fan 135 sending air to the nozzle unit 140 and an air supply motor 136 operating the air supply fan 135 therein. An intake flow path 133 is formed at the right of the air supply motor 136 and allows part of air introduced through the inlet 117 and the grease filter 118 to flow into the air supply fan 135.

[0028] An exhaust flow path 123 is formed at an upper side of the exhaust part 121 so as to exhaust air passing through the grease filter 118 so that pollutants are removed therefrom to the outside. An exhaust fan 124 forcibly taking in air and an exhaust motor 125 operating the exhaust fan 124 are installed at a lower part of the exhaust flow path 123.

[0029] With reference to Figures 4 and 5, the nozzle unit 140 includes a curved shape portion 141, a first nozzle 143 discharging air from top along a circumferential surface of the curved shape portion 141, and a second nozzle 145 discharging air from bottom along the circumferential surface of the curved shape portion 141.

[0030] The curved shape portion 141 is a circular pole or a circular pipe and has a circular cross section whose diameter (D) is 40 to 65 mm. In addition, the curved shape portion 141 is disposed at a front side of the canopy 111 such that a ratio (h/D) of a distance (h) between the center of the curved shape portion 141 and the lower surface of the canopy 111 with respect to the diameter (D) of the curved shape portion 141 is 0 to 0.25.

[0031] The first nozzle 143 is disposed at the upper side along a radial direction of the curved shape portion 141 so as to put a gap as many as 1.5 to 4 mm from the curved shape portion 141. Preferably, an interior angle (θ 1) formed by an imaginary line (L1) connecting the end of the first nozzle 143 with the center (O) of the curved shape portion 141 and a vertical line (Lv) passing through the center (O) of the curved shape portion 141 is 0 to 40 degrees in order to maximize the Coanda effect. The first nozzle 143 is connected with a fist air supply flow path 137. Because of the first air supply flow path 137, air having been sent by the air supply fan 135 is discharged through the first nozzle 143. Preferably, velocity of air discharged through the first nozzle 143 is 3 to 5 m/sec in order to maximize the Coanda effect.

[0032] The second nozzle 145 is disposed at the lower side along the radial direction of the curved shape portion 141 so as to put a gap (d2) as many as 1.5 to 4 mm from the curved shape portion 141. Preferably, an interior angle (θ 2) formed by an imaginary line (L2) connecting the end of the second nozzle 145 with the center (O) of the curved shape portion (141) and a vertical line (Lv) passing through the center (O) of the curved shape portion 141 is 90 to 135 degrees in order to maximize the Coanda effect. The second nozzle 143 is connected to the second air supply flow path 138. Because of the second air supply flow path 138, air having been sent by the air supply fan 135 is discharged through the second nozzle 145. Preferably, velocity of air being discharged through the second nozzle 145 is 3 to 5 m/sec in order to maximize the Coanda effect.

[0033] A first air supply flow path 137 and a second air supply flow path 138 are disposed at the upper and lower sides of the curved shape portion 141, respectively, such that a central direction (L3) of a mixed air current formed by air discharged through the first nozzle 143 and flowing counterclockwise along a circumferential surface of an outer side of the curved shape portion 141 by the Coanda effect and air discharged through the second nozzle 145 and flowing clockwise along the circumferential surface of the outer side of the curved shape portion 141 exists between an angle (θ 3) of 160 to 200 degrees on the basis of the vertical line (Lv).

[0034] Hereinafter, operation and effect of the exhaust hood in accordance with the first embodiment will be described.

[0035] With reference to Figures 4 and 5, when the exhaust fan 124 rotates, air is introduced into the inlet 117. Here, pollutants included in the air is removed by the grease filter 118, and the air from which pollutants have been removed is exhausted to the outside along the exhaust flow path 123.

[0036] When the air supply fan 135 rotates, part of the air from which the pollutants are removed is introduced into the intake flow path 133. The introduced air is moved along the first air supply flow path 137 and the second air supply flow path 138 and then is discharged through the first nozzle 143 and the second nozzle 145, respectively.

[0037] Part of the air discharged through the first nozzle 143 by the Coanda effect flows counterclockwise along the upper circumferential surface of the curved shape portion 141, and the air discharged through the second nozzle 145 flows clockwise along the lower circumferential surface of the curved shape portion 141. Then, the air from the first and second nozzles 143 and 145 meet each other and becomes a mixed air current.

[0038] The air discharged from the first nozzle 143 flows along the upper surface of the curved shape portion 141 and forms a negative pressure area of minus(-) gauge pressure at upper and front surfaces of the curved shape portion 141. Because of the formed negative pressure area (S1), contaminated air which is likely to flow out of the exhaust hood is curved toward the negative pressure area (S1) and is introduced into the inlet 117 again.

[0039] The mixed air current generated by adding air from the first nozzle 143 and the second nozzle 145 to each other generates an extended zone (S2) that forms the angle (θ 3) of approximately 200 degrees with respect to the vertical line (Lv), into which the contaminated air being discharged toward the lower side of the curved shape portion 141 and being likely to flow toward an outer circumferential surface of the exhaust hood is drawn. Since the extended zone (S2) brings about great indraft of fluid thereto, the contaminated air can be blocked and collected more effectively than air curtain. Because of the formed extended zone (S2), the contaminated air which is likely to flow out of the outer circumferential surface of the exhaust hood is curved toward the extended zone (S2) and is introduced into the inlet 117 again. In addition, since hot contaminated air toward the face of a cook is blocked, a pleasant cooking environment can be created.

[0040] Hereinafter, an exhaust hood in accordance with a second embodiment of the present invention will be described. The same reference numerals are given to the same parts which have been described and illustrated, and detailed descriptions for them will be omitted.

[0041] Figure 6 is a perspective view in accordance with a second embodiment of the present invention, and Figure 7 is a cross sectional view taken along line VII-VII of Figure 6.

[0042] With reference to Figures 6 and 7, different from the first embodiment, air introduced through an inlet 117 is not supplied to a first nozzle 143 and a second nozzle 145 but air introduced through an upper inlet 153 formed on an upper surface of a canopy 111 and a grease filter 155 installed at the upper inlet 153 is supplied as air to be discharged through the first nozzle 143 and the second nozzle 145 in the second embodiment.

[0043] According to the above-described construction, when an air supply fan 135 rotates, air above the canopy 111 is sucked into the inside through the upper inlet 151 and the grease filter 155, and the sucked air is discharged through the first nozzle 143 and the second nozzle 145, respectively, along a first air supply flow path 137 and a second air supply flow path 138. Then, since the operation and effect of the discharged air has been already described, a detailed description for it will be omitted.

[0044] Hereinafter, an exhaust hood in accordance with a third embodiment of the present invention will be described. The same reference numerals are given to the same parts which have been described and illustrated, and detailed descriptions for them will be omitted.

[0045] Figure 8 is a cross-sectional view of an exhaust hood in accordance with a third embodiment of the present invention. With reference to Figure 8, different from the first embodiment, air introduced through an inlet 117 is not supplied to a first nozzle 143 and a second nozzle 145, but part of air leaving through an exhaust flow path 123 is supplied as air to be discharged through the first nozzle 143 and the second nozzle 145 in the third embodiment. To do so, a reflux flow path 161 is formed inside a canopy 111 and an exhaust part 121, in which one end of the reflux flow path 161 is connected to the exhaust flow path 123 and the other end is connected to a first air supply flow path 137 and a second air supply flow path 138. Accordingly, an air supply fan 135 (refer to Figure 4) and an air supply motor 136 (refer to Figure 4) are not necessary anymore to cut down costs for them.

[0046] According to the above-described construction, when an exhaust fan 124 rotates, part of air coming out of the exhaust flow path 123 passes through the reflux flow path 161 and the first air supply flow path 137, and is discharged through the first nozzle 143. Part of the air coming out of the exhaust flow path 123 passes through the reflux flow path 161 and the second air supply flow path 138, and is discharged through the second nozzle 145. The operation and effect of the discharged air has been already described in the first embodiment, and a description for it will be omitted.

[0047] Hereinafter, an exhaust hood in accordance with a fourth embodiment of the present invention will be described. The same reference numerals are given to the same parts which have been described and illustrated, and detailed description for them will be omitted.

[0048] Figure 9 is a perspective view of an exhaust hood in accordance with a fourth embodiment of the present invention, Figure 10 is a plan view of Figure 9, and Figure 11 is a sectional view taken along line XI-XI, and Figure 12 is a sectional view taken along line XII-XII of Figure 10.

[0049] With reference to Figure 9, the fourth embodiment includes a nozzle unit 140 keeping contaminated air from moving toward the front of a canopy 111 and an auxiliary nozzle unit 170 preventing contaminated air from moving toward the side of the canopy 111.

[0050] With reference to Figures 10 and 11, an air supply fan 135 is installed at a central portion of the canopy 111 so as to supply air through the nozzle unit 140 and the auxiliary nozzle unit 170.

[0051] An intake flow path 133 is formed under the air supply fan 135 in order to lead air introduced through an inlet 117 and a grease filter 118 to the air supply fan 135.

[0052] A front air supply flow path 181 is formed at a front side of the air supply fan 135 so as to supply air to the nozzle unit 140. The front air supply flow path 181 is connected to a first air supply flow path 137 and a second air supply path 138 in order to supply air to the first nozzle 143 and the second nozzle 145 along a direction in which air flows. In addition, a plurality of lighting lamps 191 are installed inside a curved shape portion 141 and a lateral curved shape portion 171 for internal lighting and appearance.

[0053] A lateral air supply flow path 183 through which air is introduced to supply air to the auxiliary nozzle unit 170 is formed at right and left sides of the air supply fan 135.

[0054] With reference to Figure 12, the auxiliary nozzle unit 170 includes a lateral curved shape portion 171, a first lateral nozzle 173 discharging air from top along a circumferential direction of the lateral curved shape portion 171, and a second lateral nozzle 175 discharging air from bottom along the circumferential direction of the lateral curved shape portion 171.

[0055] The lateral air supply flow path 183 is connected to the first lateral air supply flow path 177 and the second lateral air supply flow path 178 so as to supply air to the first lateral nozzle 173 and the second lateral nozzle 175, respectively, along a direction in which air flows.

[0056] As constructions and operations of the lateral curved shape portion 171, the first lateral nozzle 173, the second lateral nozzle 175, the first lateral air supply flow path 177, and the second lateral air supply flow path 178 are the same as the above-described the curved shape portion 141, the first nozzle 143, the second nozzle 145, the first air supply flow path 137, and the second air supply flow path 138 of the nozzle unit 140, descriptions for them will be omitted.

[0057] According to the aforementioned construction, when the air supply fan 135 rotates, air introduced through the intake flow path 133 is moved toward the nozzle unit 140 and the auxiliary nozzle unit 170 along the front air supply flow path 181 and the lateral air supply flow path 183.

[0058] The air having been moved along the front air supply flow path 181 is moved along the first air supply flow path 137 and the second air supply flow path 138, and then is discharged through the first nozzle 143 and the second nozzle 145, respectively. Meanwhile, the air having been moved along the lateral air supply flow path 183 is moved along the first lateral air supply flow path 177 and the second lateral air supply flow path 178, and then is discharged through the first lateral nozzle 173 and the second lateral nozzle 175. The auxiliary nozzle unit 170 can prevent contaminated air that moves toward the side as well as the front of the canopy 111 from being separated and spread.

[0059] Instead of forming the intake flow path 133, air introduced through the upper inlet 153 (refer to Figure 6) can be supplied to the nozzle unit 140 and the auxiliary nozzle unit 170 by forming the upper inlet 153 on the upper surface of the canopy 111 as illustrated in the second embodiment.

[0060] In addition, instead of forming the intake flow path 133, air moving through the exhaust flow path 123 can be supplied to the nozzle unit 140 and the auxiliary nozzle unit 170 by forming the reflux flow path 161 (refer to Figure 8) inside the canopy 111 and the exhaust hood 121 as illustrated in the third embodiment.

[0061] As so far described, according to the exhaust hood in accordance with the embodiments of the present invention which have been described, first, since the nozzle unit including the curved shape portion, the first nozzle and the second nozzle is provided, contaminated air moving toward the front of the exhaust hood can be effectively introduced to the inlet and be collected. Accordingly, pleasant cooking and experimental environments can be created. Second, when the auxiliary nozzle unit is additionally provided, contaminated air moving toward the side of the exhaust hood can be effectively introduced to the inlet and be collected. Accordingly, more pleasant cooking and experimental environments can be created. Third, since heat contaminated air toward the face of a cook is blocked by the extended zone produced by a mixed air current generated by adding air from the first nozzle and the second nozzle to each other, a pleasant cooking environment can be created.

[0062] As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims

1. An exhaust hood comprising:

a hood body (110) having a canopy (111) including an inlet (117), and an exhaust part (121) connected with the canopy (111) and having an exhaust flow path (123) therein; and

a nozzle unit (140) installed at a front side of the hood body (110), and having a curved shape portion (141), a first nozzle (143) discharging air from top along a circumferential direction of the curved shape portion (141), and a second nozzle (145) discharging air from bottom along the circumferential direction of the curved shape portion (141) therein.

2. The exhaust hood of claim 1, further comprising:

a first air supply flow path (137) allowing air to be supplied to the first nozzle (143); and

a second air supply flow path (138) allowing air to be supplied to the second nozzle (145).

3. The exhaust hood of claim 2, wherein a central direction (L3) of a mixed air current formed by air discharged through the first nozzle (143) by the first air supply flow path (137) and air discharged through the second nozzle (145) by the second air supply flow path (138) exists between an angle (θ 3) of 160 to 200 degrees on the basis of the vertical line (Lv) passing the center of the curved shape portion (141).

4. The exhaust hood of claim 2 or 3, further comprising:

an air supply fan (135) sending air to the first air supply flow path (137) and the second air supply flow path (138);

an air supply motor (136) operating the air supply fan (135); and

an intake flow path (133) connected with the first air supply flow path (137) and the second air supply flow path (138), and moving air introduced through the inlet (117) toward the air supply fan (135).

5. The exhaust fan of claim 2 or 3, further comprising:

an air supply fan (135) sending air to the first air supply flow path (137) and the second air supply path (138);

an air supply motor (136) operating the air supply fan (135); and

an upper inlet (153) connected with the first air supply flow path (137) and the second air supply flow path (138) and formed on an upper surface of the canopy (111) that introduces ambient air to the air supply fan (135).

6. The exhaust hood of any of claims 2 to 5, further comprising:

a reflux flow path (161) connected with the first air supply flow path (137) and the second air supply flow path (138) in order to supply air moving through the exhaust flow path (123) to the nozzle unit (140).

7. The exhaust hood of one of claims 1 to 6, wherein in the curved shape portion (141), a ratio (h/D) of a distance (h) between the center of the curved shape portion (141) and the lower surface of the canopy (111) is 0 to 0.25.

8. The exhaust hood of claim 7, wherein the curved shape portion (141) is a circular pole or a circular pipe and has a circular cross section whose diameter (D) is 40 to 65 mm.

9. The exhaust hood of one of claims 1 to 6, wherein the first nozzle (143) is disposed at the upper side along a radial direction of the curved shape portion (141) so as to put a gap as many as 1.5 to 4 mm from the curved shape portion (141).

10. The exhaust hood of claim 9, wherein an interior angle (θ 1) formed by an imaginary line (L1) connecting the end of the first nozzle (143) with the center (O) of the curved shape portion (141) and a vertical line (Lv) passing through the center (O) of the curved shape portion (141) is zero to 40 degrees.

11. The exhaust hood of claim 9, wherein velocity of air discharged through the first nozzle (143) is 3 to 5 m/sec.

12. The exhaust hood of one of claims 1 to 6, wherein the second nozzle (145) is disposed at the lower side along the radial direction of the curved shape portion (141) so as to put a gap (d2) as many as 1.5 to 4 mm from the curved shape portion (141).

13. The exhaust hood of claim 12, wherein an interior angle (θ 2) formed by an imaginary line (L2) connecting the end of the second nozzle (145) with the center (O) of the curved shape portion (141) and a vertical line (Lv) passing through the center (O) of the curved shape portion (141) is 90 to 135 degrees.

14. The exhaust hood of claim 12, wherein velocity of air being discharged through the second nozzle (145) is 3 to 5 m/sec.

15. An exhaust hood comprising:

an exhaust body (110) having a canopy (111) including an inlet (117), and an exhaust part (121) connected with the canopy (111) and having an exhaust flow path (123) therein;

a nozzle unit (140) installed at a front side of the hood body (110) and having a curved shape portion (141), a first nozzle (143) discharging air from top along a circumferential direction of the curved shape portion (141), and a second nozzle (145) discharging air from bottom along the circumferential direction of the curved shape portion (141) therein; and

an auxiliary nozzle unit (170) installed at both sides of the hood body (110), and having a lateral curved shape portion (171), a first lateral nozzle (173) discharging air from top along a circumferential direction of the lateral curved shape portion (171), and a second lateral nozzle (175) discharging air from bottom along the circumferential direction of the lateral curved shape portion (171) therein.

16. The exhaust hood of claim 15, wherein a plurality of lighting lamps (191) are installed inside the curved shape portion (141) and the lateral curved shape portion (171).

17. The exhaust hood of claim 15, further comprising:

a first air supply flow path (137) allowing air to be supplied to the first nozzle (143);

a second air supply flow path (138) allowing air to be supplied to the second nozzle (145);

a first lateral air supply flow path (177) allowing air to be supplied to the first lateral nozzle (173); and

a second lateral air supply flow path (178) allowing air to be supplied to the second lateral nozzle (175).

18. The exhaust hood of claim 17, wherein an air supply fan (135) is installed at the canopy (111) so as to supply air to the nozzle unit (140) and the auxiliary nozzle unit (170).

19. The exhaust hood of claim 18, wherein an intake flow path (133) is formed at one side of the air supply fan (135) so as to move air introduced through the inlet (117) to the air supply fan (135).

20. The exhaust hood of claim 19, wherein a front air supply flow path (181) is formed at one side of the air supply fan (135), in which one end of the front air supply flow path (181) is connected to the intake flow path (133) and the other end is connected to the first air supply flow path (137) and the second air supply flow path (138).

21. The exhaust hood of claim 19, wherein a lateral air supply flow path (183) is formed at one side of the air supply fan (135), in which one end of the lateral air supply flow path (183) is connected with the intake flow path (133) and the other end is connected to the first lateral air supply flow path (177) and the second lateral air supply flow path (183).

Drawing