Self-Cleaning Filter Hood Assembly

Abstract

A "hood assembly capable of self-cleaning a filter" is disclosed. The hood assembly of the present invention comprises: a casing (110) positioned above a kitchen cooking appliance; a filter frame (120) positioned at an angle inclined to the inner wall surface of the casing (110) and having a filter (130) attached to the plate surface; a duct coupling plate (160) formed with a flange (161) connected to a duct (200) and coupled to the upper surface of the casing (110); a duct connecting pipe (143) provided between the filter (130) and the duct coupling plate (160) to guide contaminated air passing through the filter (130) to the duct (200); and a filter self-cleaning unit (170) provided between the casing (110) and the filter frame (120) to clean the filter (130). Here, the filter frame (120) may include a frame plate (121) having a filter coupling hole (127) formed on the plate surface to which the filter (130) is detachably coupled; an upper folding support plate (123) that is folded on the upper part of the frame plate (121) and coupled to the inner wall surface of the casing (110); and a lower folding support plate (125) that is folded on the lower part of the frame plate (121) and coupled to the inner wall surface of the casing (110), wherein the angle of inclination of the filter frame (120) is determined by the folding position and angle. Additionally, the filter self-cleaning unit (170) may include a steam cleaning unit (171) that sprays high-temperature steam onto the surface of the filter (130); It may include a hot air blower (173) provided on the inner wall surface of the casing (110) and spraying hot air onto the filter (130), whose surface is wet by the steam cleaning unit (171), to dry the filter (130); and a water receiving unit (175) for collecting water formed from the steam sprayed by the steam cleaning unit (171) and oil residue fallen from the surface of the filter (130).Here, the steam cleaning unit (171) may include a steam generating unit (171c) provided on the outer wall surface of the casing (110); a plurality of steam nozzles (171a) arranged in close proximity to the filter coupling hole (127) on the plate surface of the filter frame (120) to spray high-temperature steam onto the surface of the filter (130); a steam supply pipe (171b) connecting the steam generating unit (171c) and the steam nozzles (171a); and a water supply pipe (171d) supplying water to the steam generating unit (171c). And, the water receiving unit (175) may include a receiving container (175a) provided on the inner wall surface of the casing (110); and a water receiving plate (175b) coupled to be movable back and forth inside the receiving container (175a); It is characterized by including a water discharge pipe (175d) provided at the rear of the above-mentioned receiving container (175a) for discharging water and contaminants collected in the above-mentioned water receiving container (175b) to the outside; and a water receiving container drive unit (175c) for moving the above-mentioned water receiving container (175b) back and forth.

Description

Technology Field

[0001] The present invention relates to a hood assembly, and more specifically, to a hood assembly that allows for clean use by enabling self-cleaning of the filter. Background Technology

[0002] Generally, kitchen hoods are installed above cooking appliances to expel odors and contaminated air produced during cooking.

[0003] The hood is positioned low above the cooking appliance to quickly and effectively exhaust contaminated air generated from the appliance. The hood is connected to a duct to vent the contaminated air to the outside.

[0004] Conventional range hoods are equipped with filters along the airflow path to purify contaminated air before exhausting it. However, in conventional hoods, contaminated air accumulates on the filter surface as it flows along the hood. Filters clogged with such accumulated contaminants fail to function properly, and in some cases, these accumulated contaminants fall onto food on cooking utensils, posing a hygiene problem. Prior art literature

[0005] Published Patent No. 10-2014-0098333 "Exhaust purification device" Published Patent No. 10-2018-0054193 "Kitchen hood equipped with a water-based air care device" The problem to be solved

[0006] The objective of the present invention is to solve the aforementioned problem by providing a hood assembly that can be used cleanly by automatically cleaning the filter periodically. means of solving the problem

[0007] The above-described objective of the present invention can be achieved by a hood assembly capable of self-cleaning a filter. The hood assembly of the present invention comprises: a casing (110) positioned above a cooking appliance in a kitchen; a filter frame (120) positioned at an angle inclined to the inner wall surface of the casing (110) and having a filter (130) attached to the plate surface; a duct coupling plate (160) formed with a flange (161) connected to a duct (200) and coupled to the upper surface of the casing (110); a duct connecting pipe (143) provided between the filter (130) and the duct coupling plate (160) to guide contaminated air passing through the filter (130) to the duct (200); and a filter self-cleaning unit (170) provided between the casing (110) and the filter frame (120) to clean the filter (130). Here, the filter frame (120) may include a frame plate (121) having a filter coupling hole (127) formed on the plate surface to which the filter (130) is detachably coupled; an upper folding support plate (123) that is folded on the upper part of the frame plate (121) and coupled to the inner wall surface of the casing (110); and a lower folding support plate (125) that is folded on the lower part of the frame plate (121) and coupled to the inner wall surface of the casing (110), wherein the angle of inclination of the filter frame (120) is determined by the folding position and angle. Additionally, the filter self-cleaning unit (170) may include a steam cleaning unit (171) that sprays high-temperature steam onto the surface of the filter (130); It may include a hot air blower (173) provided on the inner wall surface of the casing (110) and spraying hot air onto the filter (130), whose surface is wet by the steam cleaning unit (171), to dry the filter (130); and a water receiving unit (175) for collecting water formed from the steam sprayed by the steam cleaning unit (171) and oil residue fallen from the surface of the filter (130).Here, the steam cleaning unit (171) may include a steam generating unit (171c) provided on the outer wall surface of the casing (110); a plurality of steam nozzles (171a) arranged in close proximity to the filter coupling hole (127) on the plate surface of the filter frame (120) to spray high-temperature steam onto the surface of the filter (130); a steam supply pipe (171b) connecting the steam generating unit (171c) and the steam nozzles (171a); and a water supply pipe (171d) supplying water to the steam generating unit (171c). And, the water receiving unit (175) may include a receiving container (175a) provided on the inner wall surface of the casing (110); and a water receiving plate (175b) coupled to be movable back and forth inside the receiving container (175a); It is characterized by including a water discharge pipe (175d) provided at the rear of the above-mentioned receiving container (175a) for discharging water and contaminants collected in the above-mentioned water receiving container (175b) to the outside; and a water receiving container drive unit (175c) for moving the above-mentioned water receiving container (175b) back and forth.

[0008] delete Effects of the invention

[0009] The hood assembly according to the present invention is equipped with a filter self-cleaning unit so that filter cleaning can be performed automatically according to a time or input condition set by the user.

[0010] Since high-temperature steam is used, you can enjoy not only the cleaning of grease residue but also a sterilization effect.

[0011] In addition, the drip tray moves automatically back and forth to collect water and oil residue falling to the bottom during the cleaning process, preventing the surroundings from becoming contaminated even while cleaning.

[0012] In addition, a hot air blower is used to dry the wet filter surface with steam, allowing the hood to be used immediately after cleaning. Brief explanation of the drawing

[0013] FIG. 1 is a perspective view illustrating the front configuration of a hood assembly of the present invention. FIG. 2 is a perspective view illustrating the rear configuration of the hood assembly of the present invention. FIG. 3 is an exploded perspective view illustrating the assembly process of the hood assembly of the present invention. FIG. 4 is an exploded perspective view illustrating the configuration of the hood assembly of the present invention in disassembly. FIG. 5 is a cross-sectional example illustrating an example of use of the hood assembly of the present invention. FIGS. 6 to 8 are cross-sectional examples illustrating the use process of a hood assembly according to another embodiment of the present invention. Specific details for implementing the invention

[0014] Hereinafter, the present invention will be described in detail with reference to preferred embodiments of the invention and the accompanying drawings, under the premise that identical reference numerals in the drawings refer to identical components.

[0015] When a component is described as "comprising" another component in the detailed description of the invention or the claims, this shall not be interpreted as being limited to being composed solely of said component unless specifically stated otherwise, but shall be understood as potentially including additional components.

[0016] FIGS. 1 and FIGS. 2 are perspective views showing the configuration of the hood assembly (100) of the present invention from different directions, FIG. 3 is an example diagram showing the assembly process of the hood assembly (100), and FIG. 4 is an exploded perspective view showing the configuration of the hood assembly (100) disassembled.

[0017] As illustrated in FIGS. 1 to 4, the hood assembly (100) of the present invention comprises a casing (110) positioned between the upper part of a cooking appliance (A) and the ceiling, a filter frame (120) positioned at an angle inside the casing (110), a filter (130) detachably coupled to the filter frame (120), a filter connecting pipe (140) coupled to the back surface of the filter (130) to guide contaminated air (G) discharged from the filter (130), an internal connecting pipe fixing plate (150) that fixes the filter connecting pipe (140) to the casing (110), and a duct connecting plate (160) that connects a duct (200) to the back surface of the casing (110).

[0018] The casing (110) is provided on the upper part of the cooking appliance (A) as shown in FIG. 5 and supports each component so that contaminated air (G) generated from the cooking appliance (A) is discharged through the interior to the duct (200).

[0019] The casing (110) is provided in the form of a housing with the top and bottom open. The casing (110) is positioned so that the open bottom faces the cooking appliance (A). The casing (110) includes an opening frame (111), a front wall (112), a rear wall (113), and a pair of side walls (115) joined along the front, rear, left, and right directions of the opening frame (111).

[0020] The opening frame (111) supports the front wall (112), the rear wall (113), and a pair of side walls (115) so that they remain joined together. The front wall (112) and the rear wall (113) each have an upper frame connecting ledge (113a) formed by bending at the top, so that the upper ends are joined to the opening frame (111). Here, the height of the front wall (112) is lower than the height of the rear wall (113), thereby ensuring sufficient front space for the user to be positioned in front of the cooking appliance (A), as shown in FIG. 5.

[0021] A pair of side walls (115) are provided in a trapezoidal shape, the upper upper jaw (115a) is connected to the opening frame (111), and the lower lower jaw (115b) is connected to the duct connecting plate (160).

[0022] The filter frame (120) is coupled at an angle inside the casing (110) to support the filter (130) in a detachable manner. As shown in FIG. 3, the filter frame (120) includes a frame plate (121) that fixes the filter (130), a lower fold support plate (125) that is folded over a certain area at the bottom of the frame plate (121) and is supported in contact with the inner wall surface of the casing (110), and an upper fold support plate (123) that is folded over a certain area at the top of the frame plate (121) and is supported in contact with the inner wall surface of the casing (110).

[0023] The frame plate (121) is cut to fit the size of the casing (110). As shown in FIG. 4, the frame plate (121) is formed by combining a lower plate (121a), an upper plate (121c), and a pair of side plates (121c) around the filter coupling hole (127). The lower plate (121a) and the upper plate (121c) are fixed by screws fastening to the upper and lower parts of the pair of side plates (121c).

[0024] The upper folding support plate (123) is provided to be folded on the upper surface of the upper plate (121c) of the frame plate (121). As shown in FIG. 5, when the filter frame (120) is coupled inside the casing (110), the upper folding support plate (123) comes into contact with the inner wall surface of the casing (110) for a certain area. A screw is fastened to the contacted upper folding support plate (123) so that the frame plate (121) is fixed to the casing (110).

[0025] As shown in FIG. 5, the lower folding support plate (125) is folded and connected to the bottom of the lower plate (121a) of the frame plate (121) and is supported in contact with the inner wall surface of the casing (110). The angle of inclination of the filter frame (120) inside the casing (110) is determined according to the position and angle at which the lower folding support plate (125) is folded to the bottom of the frame plate (121). The operator folds the lower folding support plate (125) to the bottom of the filter frame (120) according to the desired angle and positions it inside the casing (110). Then, a fastening plate (125a) is formed on a certain area at the bottom of the lower folding support plate (125) and is fixed to the casing (110) by a screw.

[0026] A filter coupling hole (127) is formed between a pair of side plates (121c) forming a frame plate (121), a lower plate (121a), and an upper plate (121c). On the outer surface of the pair of side plates (121c), the lower plate (121a), and the upper plate (121c) surrounding the filter coupling hole (127), a fitting rail (not shown) or a fastening member (not shown) into which a filter (130) is detachably fitted may be provided.

[0027] The filter frame (120) of the present invention is positioned at an angle inside the casing (110) so that contaminated air, such as oil and smoke, can pass through the filter (130) and be discharged more efficiently. When the filter (130) is positioned at an angle, oil and debris flow down along the surface of the filter (130), thereby reducing the amount of oil that accumulates on the filter (130).

[0028] Additionally, if the filter (130) is positioned horizontally, the contaminated air flows parallel to the filter (130), so the suction into the duct (200) may not be consistent. On the other hand, if the filter (130) is formed at an angle, the contaminated air can be guided to move more naturally into the duct (200).

[0029] It is desirable to design the inclination angle of the filter frame (120) appropriately, taking into account the suction force of contaminated air into the filter (130).

[0030] The filter (130) filters out oil, smoke, dust, odors, etc., from the contaminated air generated during cooking. In the present invention, the filter (130) is provided as an aluminum filter or a stainless steel filter so as to be easy to clean.

[0031] The filter connecting pipe (140) is connected to wrap around the edge of the filter (130) at the rear of the filter frame (120) to guide contaminated air (G) passing through the filter (130) toward the duct (200). As shown in FIG. 4, the filter connecting pipe (140) includes a filter coupling member (141) that wraps around the filter (130) and a connecting pipe (143) connected to the lower part of the filter coupling member (141).

[0032] As shown in FIG. 5, the filter coupling member (141) is provided to surround the outside of the filter (130) and accommodate the filter (130) inside. The connecting pipe (143) extends downward from the filter coupling member (141) and is coupled to the internal connecting pipe fixing plate (150).

[0033] The internal connecting pipe fixing plate (150) is combined with the filter connecting pipe (140) and fixes the filter frame (120) to the casing (110). The internal connecting pipe fixing plate (150) is provided with a plate-like structure, and a connecting pipe coupling hole (151) that is coupled with the connecting pipe (143) is formed through the plate surface.

[0034] As shown in FIG. 5, the inner connecting pipe fixing plate (150) is fixed to the inner wall surface of the casing (110) and the back surface of the frame plate (121) by a fastening member (not shown) with the connecting pipe (143) inserted into the connecting pipe coupling hole (151). Since one of the four sides of the inner connecting pipe fixing plate (150) is fixed to the frame plate (121) and the remaining three sides are fixed to the inner wall surface of the casing (110), the frame plate (121) and the lower folding support plate (125) can be stably maintained in an inclined folded state inside the casing (110).

[0035] The duct coupling plate (160) is coupled to the rear of the casing (110) and connected to the duct (200). The duct coupling plate (160) is coupled to the rear of the casing (110) by a fastening member (not shown). A flange (161) to which the duct (200) is connected is formed on the plate surface of the duct coupling plate (160). Additionally, a plurality of ceiling support legs (163) that contact and support the ceiling are provided in the rear edge area of ​​the duct coupling plate (160).

[0036] The hood assembly (100) of the present invention is installed on the upper part of a cooking appliance (A) as shown in FIG. 5. The front wall (112) of the casing (110) is positioned so that it faces forward and the rear wall (113) faces backward. The open lower part of the casing (110) is positioned so that it faces the cooking appliance (A), and the duct coupling plate (160) is positioned on the upper part of the casing (110) so as to be in contact with the ceiling.

[0037] The flange (161) of the duct coupling plate (160) is connected to the duct (200), and the duct (200) is equipped with an exhaust fan (not shown). The filter frame (120) is arranged in an L-shape inside the casing (110), and the filter (130) is arranged at an angle.

[0038] When contaminated air (G) is generated from food cooked in a cooking tool (B) placed on the upper part of a cooking appliance (A), the contaminated air (G) passes through a filter (130) to filter out oil residue and odors, and then moves through a filter connecting pipe (140).

[0039] And, contaminated air (G) passing through the filter connecting pipe (140) is discharged to the outside through the duct (200) connected to the duct connecting plate (160).

[0040] Meanwhile, FIGS. 6 to 8 are cross-sectional views illustrating the cross-sectional configuration of a hood assembly (100a) according to another embodiment of the present invention.

[0041] In a hood assembly (100a) according to another embodiment, a filter self-cleaning unit (170) that cleans the filter (130) itself is added to the configuration of the hood assembly (100) described above. To clean the filter (130), the user must detach it from the filter frame (120) and clean the surface directly. If this process is cumbersome and the cleaning is not performed, the efficiency of the filter (130) may decrease.

[0042] In a hood assembly (100a) according to another embodiment, filter cleaning can be performed automatically when the user desires or at preset intervals to solve this inconvenience.

[0043] The filter self-cleaning unit (170) includes a steam cleaning unit (171) that cleans the surface of the filter (130) by spraying steam (S) onto the filter (130) to dissolve oil components, a water receiving unit (175) that collects water generated by the steam (S) sprayed from the steam cleaning unit (171) and contaminants (M) that fall from the filter (130), and a hot air blower (173) that dries the filter (130) by spraying hot air (A) onto the filter (130) whose surface is wet after cleaning by the steam (S).

[0044] The steam cleaning unit (171) includes a steam generating unit (171c) provided on the outer wall surface of the casing (110), a plurality of steam nozzles (171a) arranged in close proximity to the filter coupling hole (127) on the plate surface of the filter frame (120), a steam supply pipe (171b) connecting the steam generating unit (171c) and the steam nozzles (171a), and a water supply pipe (171d) supplying water to the steam generating unit (171c).

[0045] The steam generating unit (171c) is connected to a water tank (not shown) or a water supply (not shown) to receive water and generate steam. The steam (S) generated in the steam generating unit (171c) is transferred to the steam nozzle (171a) through the steam supply pipe (171b).

[0046] A plurality of steam nozzles (171a) are provided along the width direction of the filter (130). The steam nozzles (171a) are arranged on the plate surface of the filter frame (120) at an angle that allows steam (S) to be sprayed toward the filter (130). In some cases, a fixing jig (not shown) for fixing the steam nozzles (171a) to the filter frame (120) at a certain angle may be further provided.

[0047] The hot air blower (173) rapidly dries the filter (130) by spraying hot air onto the surface of the filter (130) that has been cleaned on the plate surface by steam (S). The hot air blower (173) is positioned so that it can evenly spray hot air (A) onto the surface of the filter (130) which is positioned at an angle. At this time, the hot air blower (173) is positioned so that it does not interfere with the path through which contaminated air (G) flows into the filter (130).

[0048] The water receiving section (175) functions as a passage for collecting water condensed by the injection of steam (S) and oil residue (M) that has fallen off from the filter (130) and discharging them into the sewer. The water receiving section (175) includes a water receiving (175b), a receiving container (175a) that accommodates the water receiving (175b) inside, a water discharge pipe (175d) connected to the receiving container (175a) to discharge water and oil residue (M), and a water receiving driving section (175c) that provides driving force to enable the water receiving (175b) to move back and forth inside and outside the receiving container (175a).

[0049] Normally, when the filter (130) is not being cleaned, the water collector (175b) is housed inside the receiving container (175a) as shown in FIG. 6 so as not to interfere with the movement of contaminated air (G). As shown in FIG. 7, when the steam nozzle (171a) sprays steam (S) onto the filter (130) to clean it, the water collector (175b) moves forward from the receiving container (175a) and is positioned below the filter (130), collecting water (W) and oil residue (M) flowing down from the filter (130).

[0050] The water receiving plate (175b) is sloped downward toward the rear, allowing the water (W) and oil residue (M) contained inside to move to the water discharge pipe (175d).

[0051] The water catcher drive unit (175c) causes the water catcher (175b) to move back and forth. The water catcher drive unit (175c) may be equipped with a motor, a rack gear formed longitudinally on both sides of the water catcher (175b), and a pinion gear that operates by meshing with the rack gear.

[0052] The filter self-cleaning process of a hood assembly (100a) of another embodiment having such a configuration will be explained with reference to FIGS. 6 to 8.

[0053] Normally, when the filter is not cleaned, the steam nozzle (171a) and the hot air blower (173) do not operate as shown in FIG. 6. Additionally, the water receiving part (175) of the water receiving section (175) is retracted and remains stored inside the receiving container (175a).

[0054] In this state, when the user applies a filter cleaning signal or the filter cleaning time entered through the input unit is reached, steam (S) is generated from the steam generator (171c) as shown in FIG. 7, and the steam (S) is supplied to the steam nozzle (171a) through the steam supply pipe (171b). The multiple steam nozzles (171a) spray high-temperature steam (S) onto the surface of the filter (130), and the steam (S) emulsifies the oil residue on the surface of the filter (130) so that it falls off the surface of the filter (130). Additionally, when the steam (S) is sprayed at high pressure, the oil residue (M) emulsified by the spray pressure of the steam (S) is pushed out from the surface of the filter (130) and flows down to the water collector (175b). Water condensed from the steam (S) on the surface of the filter (130) also flows down and is collected in the water collector (175b).

[0055] When the injection of steam (S) is completed for a certain period of time, the steam generating unit (171c) and the steam nozzle (171a) stop operating.

[0056] Then, as shown in FIG. 8, a hot air blower (173) blows hot air (A) toward the filter (130). The hot air (A) rapidly evaporates water droplets on the surface of the metal filter (130), thereby drying the filter (130).

[0057] During this process, the water collector (175b) remains in an advanced state and collects water droplets flowing down from the filter (130).

[0058] When the hot air (A) spraying is completed for the set time, the hot air blower (173) stops operating, and the water tray (175b) retracts and is stored back inside the receiving container (175a).

[0059] Through this process of cleaning the filter (130) with steam (S), the filter (130) can always be kept clean even if the user does not manually separate and clean the filter (130).

[0060] As described above, the hood assembly according to the present invention is equipped with a filter self-cleaning unit so that filter cleaning can be performed automatically according to a time or input condition set by the user.

[0061] Since high-temperature steam is used, you can enjoy not only the cleaning of grease residue but also a sterilization effect.

[0062] In addition, the drip tray moves automatically back and forth to collect water and oil residue falling to the bottom during the cleaning process, preventing the surroundings from becoming contaminated even while cleaning.

[0063] In addition, a hot air blower is used to dry the wet filter surface with steam, allowing the hood to be used immediately after cleaning.

[0064] The technical concept of the present invention has been examined through the above examples.

[0065] It is obvious that a person skilled in the art to which the present invention pertains can make various modifications or changes to the embodiments described above from the description of the present invention. Furthermore, it is obvious that a person skilled in the art to which the present invention pertains can make various modifications including the technical concept according to the present invention from the description of the present invention, even if not explicitly illustrated or described, and such modifications still fall within the scope of the rights of the present invention. The embodiments described above with reference to the accompanying drawings are described for the purpose of explaining the present invention, and the scope of the rights of the present invention is not limited to these embodiments. Explanation of the symbols

[0066] 100 : Hood assembly 110 : Casing 111 : Opening frame 112 : Front wall 113: Rear wall 113a: Upper frame connecting jaw 115 : Side wall 115a : Upper jaw 115b : Lower jaw 120 : Filter frame 121 : Frame plate 121a : Bottom plate 121b : Side plate 121c : Top plate 123 : Upper folding support plate 125 : Lower folding support plate 125a : Fastening plate 127 : Filter coupling hole 130 : Filter 140 : Filter connector 141: Filter coupling 143: Connecting pipe 150 : Internal connecting pipe fixing plate 151 : Connecting pipe coupling hole 160 : Duct connection plate 161 : Flange 163 : Ceiling support leg 170 : Self-cleaning filter unit 171: Steam cleaning unit 171a: Steam nozzle 171b: Steam supply pipe 171c: Steam generation unit 171d : Water supply pipe 173 : Hot air blower 175 : Water catcher 175a : Receiving box 175b: Gutter 175c: Gutter drive unit 175d: Water drain pipe A : Hot air M : Oil residue W : Water S : Steam

Claims

Claim 1 The apparatus comprises: a casing (110) positioned above a kitchen cooking appliance; a filter frame (120) positioned at a certain angle inclined on the inner wall surface of the casing (110) and having a filter (130) attached to the plate surface; a duct coupling plate (160) attached to the upper surface of the casing (110) and having a flange (161) formed therein that connects to a duct (200); a duct connecting pipe (143) provided between the filter (130) and the duct coupling plate (160) to guide contaminated air passing through the filter (130) to the duct (200); and a filter self-cleaning unit (170) provided between the casing (110) and the filter frame (120) to clean the filter (130), wherein the filter frame (120) comprises a frame plate (121) having a filter coupling hole (127) formed therein to which the filter (130) is detachably attached to the plate surface; and the The filter self-cleaning unit (170) includes an upper folding support plate (123) that is folded at the upper part of the frame plate (121) and coupled to the inner wall surface of the casing (110); and a lower folding support plate (125) that is folded at the lower part of the frame plate (121) and coupled to the inner wall surface of the casing (110), wherein the angle of inclination of the filter frame (120) is determined by the folding position and angle. The filter self-cleaning unit (170) includes a steam cleaning unit (171) that sprays high-temperature steam onto the surface of the filter (130); a hot air blower (173) provided on the inner wall surface of the casing (110) that sprays hot air onto the filter (130), whose surface is wet by the steam cleaning unit (171), to dry the filter (130); and a device that collects water formed from the steam sprayed by the steam cleaning unit (171) and oil residue that has fallen from the surface of the filter (130). It includes a water receiving section (175), and the steam cleaning section (171) comprises: a steam generating section (171c) provided on the outer wall surface of the casing (110); a plurality of steam nozzles (171a) arranged in close proximity to the filter coupling hole (127) on the plate surface of the filter frame (120) to spray high-temperature steam onto the surface of the filter (130); and a steam supply pipe (171b) connecting the steam generating section (171c) and the steam nozzles (171a).A hood assembly characterized by including a water supply pipe (171d) that supplies water to the steam generating unit (171c), wherein the water receiving unit (175) comprises: a receiving box (175a) provided on the inner wall surface of the casing (110); a water receiving unit (175b) coupled to be movable back and forth inside the receiving box (175a); a water discharge pipe (175d) provided at the rear of the receiving box (175a) for discharging water and contaminants collected in the water receiving unit (175b) to the outside; and a water receiving unit driving unit (175c) that moves the water receiving unit (175b) back and forth. Claim 2 delete Claim 3 delete Claim 4 delete

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