Exhaust hood

Abstract

To provide an exhaust hood capable of reducing workload or labor in a construction site, and further capable of flexibility changing an installation place of a grease filter in accordance with layout or the like of a cooking table without requiring excessive driving force of the exhaust fan.SOLUTION: An exhaust hood has a box shape with a ceiling side panel and a hanging part. A gutter pipe provided in the hanging part is an oil receiving part, and also serves as a sill part. Further, at least one lintel part is provided downward from the ceiling side panel. At least one grease filter can be fitted into the lintel part and the sill part so that the grease filter can be removed and slid laterally.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an exhaust hood installed in a commercial kitchen.

Background Art

[0002] Among the exhaust hoods installed in commercial kitchens, the most common one is a box-shaped one as shown in FIG. 8. The exhaust hood 100 is installed as close as possible to the source of generation in order to prevent water vapor, oil fumes, odors, etc. (collectively referred to as "oil fumes, etc." hereinafter) generated from the cooking table in the commercial kitchen from diffusing into the room, has an opening area that covers the exhaust containing the oil fumes, etc., and needs to be provided with a predetermined hanging portion 101. The box-shaped exhaust hood 100 shown in FIG. 8 can be said to be the most efficient shape for local exhaust while being simple and easy to maintain.

[0003] As shown in FIG. 8(b), an exhaust duct D for discharging the exhaust containing oil fumes, etc. generated from the kitchen to the outside is provided in the ceiling C, and an exhaust fan (not shown) is connected to the exhaust duct D. The exhaust hood 100 is installed on the ceiling C or the like so that the suction port D1 of the exhaust duct D is connected to the opening 103 provided on the ceiling side plate 102 of the exhaust hood 100. In the exhaust hood 100, it is necessary to provide a grease filter unit 110 for separating and capturing the oil fumes, etc. contained in the exhaust from the exhaust before it enters the exhaust duct D provided in the ceiling C. Patent Document 1 discloses an exhaust hood 100 provided with this grease filter unit (exhaust device) 110.

[0004] The grease filter unit 110 disclosed in Patent Document 1 has a grease filter chamber 120 for double-sided exhaust (hereinafter referred to as "chamber") with the shape of the left and right side plates 121 as shown in Fig. 8(c) being substantially inverted triangular and having exhaust suction ports 122 on both the front and back sides. In the chamber 120, a filter cover 123 for installing the grease filter GF is provided in a beam shape at the upper part of the left and right side plates 121, and an oil pan 124 that also serves as a grease filter receiver is provided at the lower part. The grease filter GF is fitted into the chamber 120 so as to cover the exhaust suction port 122, which is an opening formed by the filter cover 123, the oil pan 124, and the left and right side plates 121. When the exhaust fan is operating, the inside of the chamber 120 in which the grease filter GF is fitted is under negative pressure.

[0005] As shown in Fig. 9, in the grease filter GF, stainless steel plates GF2 with a U-shaped cross-section are installed at equal intervals inside a rectangular frame GF1. When the exhaust containing oil fumes etc. passes through the grease filter GF, the particles of oil fumes etc. collide with the stainless steel plates GF2 and are captured while changing direction, and the exhaust from which the oil fumes etc. have been removed is guided into the exhaust duct D.

[0006] The particles of oil fumes etc. captured by the grease filter GF flow downward under the influence of gravity, are sucked into the chamber 120, which is a negative pressure chamber by the exhaust fan, and are guided to the oil pan 124. The oil pan 124 is provided with an inclination, and the waste oil accumulated in the oil pan is collected from the oil discharge hole 125 provided at the bottom of the oil pan 124 through the pipe 131 to the oil cup 132 for receiving oil.

[0007] Incidentally, the exhaust hood 100 and the grease filter unit 110 disclosed in Patent Document 1 are provided separately and are assembled at the construction site respectively. Since the exhaust hood 100 is manufactured according to the size of the cooking table in a commercial kitchen, unlike a household exhaust hood, in many cases, the size is customized rather than standardized. In a large kitchen, the cooking table is large, and inevitably the exhaust hood is also large. Also, from the perspective of fire protection, the material of the exhaust hood is stainless steel, and the work burden of installing the exhaust hood on the ceiling is not light at all.

[0008] On the other hand, although there are slight differences among manufacturers, standardized sizes are used for the grease filter unit 110. When the opening area of the exhaust hood 100 is determined from the size of the cooking table in the kitchen, the processing air volume is determined. Once the processing air volume is determined, after considering the air volume and pressure loss, an optimal-sized grease filter unit is selected.

[0009] The grease filter unit is of two types: one (double-sided) in which the grease filter GF is installed at the exhaust suction ports 122 provided on the front and back two sides as shown in Fig. 8(b) according to the kitchen layout, and the other (single-sided) in which the grease filter GF is installed at the exhaust suction port provided only on the front side. Also, as the processing air volume increases, in the chamber 120, the grease filters GF are increased one by one in the lateral direction (horizontal direction).

[0010] When only one grease filter GF is installed in the lateral direction and it is single-sided, it is called a single-sided continuous type, and when it is double-sided, it is called a double-sided continuous type, etc. Further, when the processing air volume increases, for example, the chamber 220 in the exhaust hood 200 shown in Fig. 10 shows three grease filters GF arranged side by side in the lateral direction. In this case, it is called a single-sided or double-sided triple type. Thus, the grease filter unit 210 can select a standardized size.

[0011] As described above, the exhaust hood is not of a uniform size and is customized, while the size of the grease filter unit (grease filter and chamber) is standardized. Therefore, as shown in FIG. 10, when combining the sizes of the exhaust hood 200 and the grease filter unit 210, there may occur a mismatched layout space W where there is no space for the grease filter unit 210 in the required space.

[0012] Also, the exhaust duct D is usually installed in the opening 203 provided in the central part of the ceiling side plate 202 of the exhaust hood 200, and the installation position of the chamber 220 is also installed in the middle (in terms of the left - right width) of the exhaust hood 200. In the case of a large kitchen, on the cooking table 300, there are arranged a stove 301, a workbench 302, a noodle - boiling machine, a fryer 303, etc. As shown in FIG. 10(b), for example, when the workbench 302 (the lines in the figure are only schematically surrounding the position of the workbench for easy understanding of where it is, and such lines are not actually necessary) is provided in the center of the cooking table 300, the grease filter GF in the middle of the grease filter unit 210 will be provided on the workbench 302 where no oil fumes are generated.

[0013] Since the opening of the exhaust suction port 232 of the triple - chamber 230 has a size corresponding to three grease filters GF, an exhaust fan having such a processing air volume must be adopted, which will require excessive power. That is, the degree of freedom to install the grease filter at a more optimal position according to the source of oil fumes, etc. is low.

[0014] One of the factors considered as the cause for such a situation where a mismatched layout space W and excessive power are required is that the final layout on the cooking table 300 is determined by the user who actually uses the kitchen after the building is completed, rather than at the design stage. Therefore, a situation that was not assumed at the design stage occurs.

[0015] In addition, the work of assembling the grease filter unit 210 on-site and installing it in the exhaust hood 200 is also time-consuming and laborious, and the burden is large.

[0016] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-336799 [Summary of the Invention] [Problems to be Solved by the Invention]

[0017] In view of the above-described problems, the present invention aims to reduce the work burden and labor at the construction site, and further, without requiring excessive power of the exhaust fan, in accordance with the layout of heat source devices such as the stove and fryer on the cooking table, to provide an exhaust hood that can flexibly adjust the installation location of the grease filter. [Means for Solving the Problems]

[0018] The exhaust hood used in the commercial kitchen according to the present invention includes a ceiling side plate, a hanging portion provided around the ceiling side plate, and a tray portion provided below the hanging portion. The tray portion is an oil receiving portion provided in the hanging portion. At least one or more openings serving as connection portions to an exhaust duct or a ventilation fan are provided in either the ceiling side plate or the hanging portion. At least one or more eaves portions are provided on the ceiling side plate facing downward. The tray portion also doubles as a threshold portion. At least one or more grease filters can be removably and slidably inserted horizontally into the eaves portion and the threshold portion. The opening opens into a space surrounded by the eaves portion and the hanging portion into which the grease filter is inserted, and this space is a negative pressure chamber.

[0019] As a result, the grease filter can be flexibly arranged at an optimal position such as above the heat source equipment of the cooking table. If the exhaust hood is installed on the ceiling side during construction at the building site, the grease filter can be fitted in, eliminating the man-hours for separately assembling the chamber and installing it in the exhaust hood, and significantly reducing the work burden and effort. Also, since the grease filter is fitted into the drooping part, the oil pan required for the conventional chamber becomes unnecessary, and accordingly, the height of the exhaust hood (the vertical dimension of the drooping part) can be reduced.

[0020] Moreover, the eaves part of the exhaust hood of the present invention is characterized by having an inclined part of 45 degrees or more from the horizontal plane.

[0021] As a result, the grease filter is held in the exhaust hood with an inclination of 45 degrees or more from the horizontal plane, and particles such as oil fumes captured by the grease filter flow downward by gravity and are guided to the part which is the oil receiving part.

[0022] Furthermore, at least one or more oil discharge ports are provided at the bottom of the part which also serves as the threshold part of the exhaust hood of the present invention.

[0023] As a result, the oil accumulated in the part can be easily recovered.

[0024] Also, the exhaust hood of the present invention can also have spacers removably and slidably fitted horizontally into the eaves part and the threshold part.

[0025] As a result, even if the left - right width of the exhaust hood and the left - right width of the grease filter when the number required to maximize the removal performance of oil fumes etc. are fitted in do not exactly match, by providing spacers, the grease filter can be installed at the position where the grease filter is required. Also, by providing spacers at the part where no oil fumes etc. are generated on the cooking table, the area of the opening which becomes the exhaust suction port can be optimized, so there is no need to unnecessarily enlarge the exhaust fan, and it can be operated with optimal power, leading to energy savings.

Brief Description of the Drawings

[0026]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Modes for Carrying Out the Invention

[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same parts or corresponding parts are denoted by the same reference numerals. Note that

[0028] Reference numeral 10 in Fig. 1 is an exhaust hood according to the first embodiment of the present invention. The exhaust hood 10 is box-shaped with hanging parts 1 around the four sides of the ceiling side plate 2 that is rectangular in plan view, and is used in an environment open on all four sides. It is a double-sided type exhaust hood with grease filters installed on both the front and rear sides. For convenience of explanation, the front, rear, left, and right directions of the exhaust hood 10 are indicated by arrows. It will be described as the front hanging part 1a, the rear hanging part 1b, the left hanging part 1c, and the right hanging part 1d.

[0029] At the lower ends of all the hanging parts 1 on the front, rear, left, and right, a bent-in part 4 is provided that is bent inward. The bent-in part 4 captures condensed water such as oil fumes adhering inside the exhaust hood 10 and is an oil receiving part. The lower end of the hanging part 1 has a bottom part 5 bent horizontally and a rising part 6 bent further upward from the bottom part 5. An oil discharge hole 7 is provided in the bottom part 5 of the bent-in part 4. A pipe may be connected to the oil discharge hole 7, or an oil cup may be directly installed.

[0030] As shown in Fig. 1, an opening 3a and an opening 3b are respectively provided at the center of the front half and the rear half of the ceiling side plate 2. The suction ports D1 (D1a, D1b) of the exhaust duct D are connected to the openings 3 (3a, 3b). Duckbill parts 8 (8a, 8b) are provided from the ceiling side plate 2 downward over the entire left and right width of the exhaust hood 10. The duckbill parts 8 (8a, 8b) have an inclined surface 9 (9a, 9b) having an inclination of 45 degrees or more with respect to the horizontal plane from the ceiling side plate 2, and a stopper 11 provided in the middle of the inclined surface 9 so as to be perpendicular to the inclined surface 9. The lower end 9´ (9a´, 9b´) of the inclined surface 9 is provided at a height to support the upper side of the frame GF1 of the grease filter GF, and the grease filter GF is fitted into the inclined surface 9 (9a, 9b) of the duckbill part 8 (8a, 8b) and the bent-in part 4 (4a, 4b), respectively.

[0031] The grease filter GF is inserted until it hits the stopper 11 provided on the inclined surface 9 of the duck rest portion 8, and then the bottom of the grease filter GF is inserted into the trough portion 4. As shown in Fig. 1, the upper front portion of the frame GF1 of the grease filter GF is placed along the inclined surface 9 of the duck rest portion 8, and the lower side of the frame GF1 of the grease filter GF is supported by the bottom 5 of the trough portion 4, the upper end portion 6' of the rising portion 6, and the hanging portion 1, and the grease filter GF is stabilized by its own weight.

[0032] The inclined surface 9 of the duck rest portion 8 and the trough portion 4 serve as a frame for fitting the grease filter GF. The grease filter GF can be slid in the left - right direction within the frame composed of the duck rest portion 8 and the trough portion 4 and freely positioned. The trough portion 4, in addition to serving as an oil receiving portion, also serves as a threshold portion.

[0033] The openings 3 (3a, 3b) that serve as the connection portions with the exhaust duct D are surrounded by the ceiling side plate 2, the duck rest portion 8, the grease filter GF, and the hanging portion 1. The space S1 (S1a, S1b) becomes a negative pressure chamber when the exhaust fan is in operation. The opening surrounded by the frame composed of the duck rest portion 8 and the trough portion 4 and the left - right hanging portions 1c, 1d is the exhaust suction port 12 (12a, 12b). By installing the grease filter GF at the exhaust suction port 12 (12a, 12b) which is the passage for exhaust, the oil fume etc. contained in the exhaust is removed, and clean air is discharged to the duct D.

[0034] Figure 2 is a sectional view taken along the line A-A' of Figure 1, and shows a grease filter GF fitted into the rear hanging portion 1b. As shown in Figure 2, on the cooking table 300, a stove 301 is installed on the left side facing the paper, and a noodle cooker or a fryer 303 is installed on the right side. The space in the middle of the cooking table 300 serves as a working table 302 for cutting and plating materials. The exhaust hood 10 has four grease filters GF fitted, but since no exhaust containing oil fumes or the like is generated from the working table, a spacer 13 is fitted on the working table instead of the grease filter GF. The spacer 13, like the grease filter GF, is slidably fitted in the left-right direction on the duckbill portion 8 and the portion 4, but there is no air passage. Therefore, the treated air volume can be determined by the area of the grease filter GF and the spacer fitted into the exhaust suction port 12.

[0035] The exhaust hood 20 shown in Figure 3 is an exhaust hood according to the second embodiment. It is used in an environment with three-sided openings. The rear hanging portion 21b is installed on the side wall of the kitchen, and the opening 23 connected to the exhaust duct D is provided in the rear hanging portion 21b of the hanging portion 21. A fan F installed at the supply and exhaust port provided on the side wall of the kitchen room is installed at the opening 23 (however, it is not limited to this, and the duct D may be connected to the opening 23).

[0036] In the case of the exhaust hood 20 with three-sided openings, the inclined surface 29 of the duckbill portion 28 where the grease filter GF is installed is inclined toward the rear hanging portion 21b. The inclined surface 29 is for the grease filter GF, and the grease filter GF is of a single-sided type placed on the portion 24 of the rear hanging portion 21b. The space S2 surrounded by the left and right hanging portions (not shown in the figure but 21c, 21d), the rear hanging portion 21b, the ceiling side plate 22, and the frame composed of the portion 24 (24b) of the threshold portion 28 becomes a negative pressure chamber when the fan F is in operation.

[0037] Similar to the first embodiment, the lower end 29' of the inclined surface 29 is provided at a height to support the upper frame GF1 of the grease filter GF. The grease filter GF is fitted into the inclined surface 29 of the duck rest portion 28 and the portion 24 respectively. The opening frame surrounded by the frame composed of the duck rest portion 28 and the portion 24 (24b) and the left and right hanging portions of the exhaust hood 20 is the exhaust suction port 32. By installing the grease filter GF in the exhaust suction port 33 which is the passage of the exhaust, the oil fume etc. contained in the exhaust is removed, and clean air is discharged outdoors.

[0038] The exhaust hood 40 shown in Fig. 4 is an exhaust hood according to the third embodiment. The grease filter GF is placed on all the surfaces of the portion 44 of the hanging portions 41 on the front, rear, left and right. It is a view showing the state of looking up from below. The duck rest portion 48 and the portion 44 are the same as the exhaust hoods 10 and 20 described above, but corner spacers 53X etc. for filling the gaps are provided at the corners. Also, spacers 53 can be fitted at arbitrary places instead of the grease filter GF, so that the layout can be freely arranged according to the kitchen layout and the processing air volume.

[0039] For the exhaust hood 40 according to the third embodiment, the opening connected to the exhaust duct may be provided on the ceiling side plate 42 or on the hanging portion 41. The location and number of the openings can be appropriately determined according to the kitchen layout, the installation location of the exhaust duct and the processing air volume of the fan.

[0040] In the exhaust hood 40 of Fig. 4, the grease filter GF is placed on the portion 44 of all the hanging portions 41 on the four sides, but it is not limited to this. It may be placed on the portion 44 of the hanging portions 41 on the three sides, or for example, it is also possible to place it only on the portion 44a and 44c of the front hanging portion 41a and the left hanging portion 41c.

[0041] Also, as shown in Fig. 4, a conventional grease filter unit 110 (chamber 120) may be added to the ceiling side plate 42.

[0042] The exhaust hood 60 shown in Fig. 5 is an exhaust hood according to the fourth embodiment. Grease filters GF are placed on the portions 64a and 64b of the front and rear (or left and right) hanging parts 61a and 61b. Further, in the exhaust hood 60, an opening 63X is also provided at the center of the ceiling side plate 62 in accordance with the layout of the cooking counter in the kitchen, and a duckbill part 68X (68Xa, 68Xb) is provided downward from the ceiling side plate 62 so as to surround the opening.

[0043] The inclined parts 69X (69Xa, 69Xb) of the duckbill part 68X (68Xa, 68Xb) are provided at the center in the front - rear direction of the duckbill part 68X (68Xa, 68Xb) and are inclined toward the portion 64X which is provided to the full width of the left - and - right hanging parts of the exhaust hood 60.

[0044] As shown in Fig. 5(a), the lower ends of the grease filters GF facing each other are placed on the portion 64X. Since two lower ends of the grease filters GF are placed in the front - rear direction on the portion 64X, a vertical part 64Xe is provided at the center in the front - rear direction of the portion 64X, and the portion 64X is divided into a front side and a rear side (64Xa, 64Xb). However, it is not limited to this, and it may be the front - side portion 64Xa and the rear - side portion 64Xb having a U - shaped cross - section.

[0045] The duckbill part 68X has an inclined surface 69 (69Xa, 69Xb) having an inclination of 45 degrees or more with respect to the horizontal plane from the ceiling side plate 62 and stoppers 71X (71Xa, 71Xb). The grease filter GF is fitted into the inclined surface 69X (69Xa, 69Xb) of the duckbill part 68 (68Xa, 56Xb) and the portion 64X (64Xa, 64Xb) respectively, which is the same as the above - described embodiment.

[0046] The opening 63 provided in the ceiling side plate 62 serves as the connection part with the exhaust duct D. The space S3 surrounded by the ceiling side plate 62, the lintel part 68, the grease filter GF, and the hanging part 61 becomes a negative pressure chamber when the exhaust fan is operating. Also, the frame composed of the ceiling side plate 62, the lintel part 68X (68Xa, 68Xb) and the part 64X, the left and right hanging parts 61c, 61d, and the chamber space SX3 surrounded by the grease filter GF also becomes a negative pressure chamber when the exhaust fan is operating.

[0047] The part 64X for the chamber shown in FIG. 5 is provided at the same height position as the part 64 of the exhaust hood 60. However, like the exhaust hood 80 according to the fifth embodiment shown in FIG. 6, the part 84X can also be provided over the entire width of the left and right hanging parts 81 (81c, 81d) of the exhaust hood 80 so as to be in the middle of the height of the exhaust hood.

[0048] The exhaust hood according to the sixth embodiment shown in FIG. 7 has a supply air port panel 95 with a supply air port 90 or a spacer 13 fitted into the rear lintel part 8b and the part 4b of the exhaust hood 10 of the first embodiment shown in FIG. 1 instead of the grease filter GF. As shown in FIG. 7(b), the supply air port 90 may be a horizontally long opening (90x) below the supply air port panel 95 and incorporate a line diffuser, or a vertically long opening (90y) at the center of the supply air port panel 95 and be the blowing outlet of a fixed blade, or be in the form of a square opening (90z) and incorporate punching metal.

[0049] A supply air duct AS that conveys air supplied from a supply air fan (not shown) to the supply air port 90 is connected to the rear opening 3b of the ceiling side plate 2. The rear space S1b surrounded by the ceiling side plate 2, the rear lintel part 8b, the supply air port panel 95 and the spacer 13, and the hanging part 1 becomes a positive pressure chamber when the supply air fan is operating, and air is supplied from the supply air port 90.

[0050] The oil fumes and the like generated from the cooking table by this air are actively induced to the grease filter GF which is the window of the negative pressure chamber S1a more efficiently and exhausted, and at the same time, the air conditioning load of the kitchen room can be suppressed. Also, due to the air curtain effect, the oil fumes and the like can be exhausted without being escaped.

[0051] Furthermore, the opening surrounded by the frame composed of the rear duckbill part 8b and the rear side part 4b and the left and right side hanging parts 1c, 1d can be fitted with the required number of air supply panels 95 with air supply ports and spacers 13 without air supply ports appropriately combined and inserted into the air supply port 12b' which is the passage of the air supply, so that the air supply ports 90 can be laid out at the required places and the air supply amount can be controlled for efficient exhaust. The air supply panel 95 with an air supply port can be removably and slidably inserted horizontally into the rear duckbill part 8b and the rear side part 4b.

[0052] Also in the third, fourth, and fifth embodiments, an air supply panel 95 may be inserted instead of the grease filter GF into the air supply port of the space to which the air supply duct AS is connected instead of the exhaust duct D.

Explanation of Signs

[0053] 10, 20, 40, 60, 80, 100, 200 Exhaust hood 1, 21, 41, 61, 81 Hanging part 2, 22, 42, 62 Ceiling side plate 3, 23, 43, 63 Opening 4, 24, 44, 64, 64X, 84, 84X Side part 5 Bottom 6 Upright part 7 Oil discharge hole 8, 28, 48, 68, 68X Duckbill part 9 29, 49, 69 Inclined surface 11, 31, 51, 71 Stopper 12, 32, 52, 72 Exhaust suction port 12´ Air supply port 13, 53 Spacer 53X Corner spacer 90 air supply port 95 air supply port panel 110 grease filter unit 120 grease filter chamber 300 cooking table 301 stove 302 workbench 303 fryer / noodle cooker C ceiling D exhaust duct GF grease filter S1, S2, S3, S3X space

Claims

1. The exhaust hood used in a commercial kitchen comprises a ceiling side plate, a hanging part provided around the ceiling side plate, a tray part provided at the lower part of the hanging part, and has the tray part is an oil receiving part provided on the hanging part, at least one or more openings serving as connection parts with an exhaust duct or a ventilation fan are provided in either the ceiling side plate or the hanging part, at least one or more duckbill parts are provided on the ceiling side plate facing downward, the tray part also serves as a threshold part, at least one or more grease filters can be removably and slidably fitted horizontally into the duckbill part and the threshold part, the opening opens into a space surrounded by the duckbill part into which the grease filter is fitted and the hanging part, and the space is a negative pressure chamber, and the exhaust hood is characterized in that.

2. at least one or more openings serving as connection parts with an air supply duct or an intake fan are provided in either the ceiling side plate or the hanging part, at least one or more air supply panel with air supply ports can be removably and slidably fitted horizontally into the duckbill part and the threshold part, the opening opens into a space surrounded by the duckbill part into which the air supply panel with air supply ports is fitted and the hanging part, and the space is a positive pressure chamber, and the exhaust hood according to claim 1 is characterized in that.

3. the duckbill part has an inclined part of 45 degrees or more from the horizontal plane, and the exhaust hood according to claim 1 or 2 is characterized in that.

4. at least one or more oil discharge holes are provided at the bottom of the tray part also serving as the threshold part, and the exhaust hood according to claim 1 or 2 is characterized in that.

5. at least one or more oil discharge holes are provided at the bottom of the tray part also serving as the threshold part, and the exhaust hood according to claim 3 is characterized in that.

6. spacers can be removably and slidably fitted horizontally into the duckbill part and the threshold part, and the exhaust hood according to claim 1 or 2 is characterized in that.

7. spacers can be removably and slidably fitted horizontally into the duckbill part and the threshold part, and the exhaust hood according to claim 3 is characterized in that.

8. The exhaust hood according to claim 1 or 2, characterized in that the portion also serving as the threshold portion can be provided in the middle of the height of the hanging-down portion.

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