Air duct device of range hood and range hood

Abstract

The utility model discloses an air duct device of a range hood and the range hood, and the air duct device comprises an air duct shell which is provided with a first opening for air inlet or air outlet; the mounting structure is arranged in the first opening of the air duct shell; the filtering assembly is mounted on one side of the mounting structure and is used for filtering oil fume; the installation structure is provided with an installation area used for installing a fan motor and / or a filter assembly, and a cavity is formed between the installation area and the opposite filter assembly in a spaced mode. According to the range hood disclosed by the utility model, the cavity is formed between the mounting area of the mounting structure and the filter component, so that a fan motor or a mounting part of the filter component can be avoided, and the filter component opposite to the mounting area can be prevented from being blocked by accumulated oil fume when the oil fume is too much, and therefore, the filtering effect of the filter component can be improved; the purification effect of the range hood is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of kitchen appliances, concretely relates to a duct device of an extractor hood and the extractor hood. BACKGROUND

[0002] In the prior art, the extractor hood usually utilizes the motor to generate strong suction force, effectively sucks a large amount of oil fume generated in the cooking process into the hood, and discharges to the outdoor through the preset flue pipe. This design perfectly matches the large oil fume amount feature in the cooking habit of China, and most residential buildings are designed to reserve the external flue pipe, thereby ensuring that the oil fume can be smoothly and efficiently discharged to the outdoor, maintaining the clean and comfortable indoor environment.

[0003] However, in actual application, some users do not reserve the external flue pipe or flue in the home due to the house structure limitation or personal habit. In this case, the traditional design of directly discharging the oil fume to the outdoor cannot be applied because of the lack of discharge passage, and the oil fume cannot be effectively discharged. In order to solve this problem, the extractor hood needs to have the internal circulation function, that is, after sucking the oil fume, the oil fume can be effectively filtered, and then the purified air is discharged back to the indoor to reduce the oil fume concentration in the kitchen and ensure the indoor air quality.

[0004] In order to meet this demand, the internal circulation type extractor hood is designed, that is, the mounting bracket is arranged in the air duct opening of the extractor hood, and the filter module is mounted on the bracket. The filter module can adsorb and filter the sucked oil fume to achieve the oil fume purification purpose, and then the treated air is discharged into the indoor. However, this design has the following problems in actual application. Especially in the case of large oil fume amount, the partial area of the filter module and the bracket is too tightly fitted and is easy to be blocked, especially when the partial area of the bracket is connected with the filter module or the fan motor, the blocking problem is more likely to occur. This not only seriously hinders the air inlet and filtering function of the filter module, but also may have a negative impact on the overall performance of the hood, resulting in the reduction of the oil fume purification efficiency and the inability to meet the efficient and stable oil fume treatment demand.

[0005] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0006] The utility model solves the technical problem of the prior art, and aims to provide a duct device of an extractor hood. The mounting area of the filter assembly and the mounting structure is spaced apart to form a cavity, preventing the filter assembly from being blocked due to too tight fitting when the oil fume is too large, ensuring smooth air inlet or air outlet of the filter assembly, and improving the oil fume filtering efficiency.

[0007] The utility model aims to further provide an extractor hood.

[0008] The utility model discloses a basic idea of technical scheme is: provide a range hood's air duct device, including:

[0009] Air duct shell, the air duct shell is equipped with first opening, is used for air inlet or air outlet;

[0010] Mounting structure is arranged in the first opening of air duct shell;

[0011] Filter assembly is installed on one side of mounting structure, is used for filtering oil smoke;

[0012] The mounting area is formed on the mounting structure, is used for installing fan motor and / or filter assembly, and the mounting area is spaced apart from the filter assembly and forms cavity.

[0013] Further, the filter assembly and the opposite of the mounting area are recessed to the direction away from the mounting structure, and the cavity is formed between the mounting structure,

[0014] Or, the mounting area of the mounting structure is recessed to the direction away from the filter assembly, and the cavity is formed between the filter assembly.

[0015] Further, the mounting area is located in the middle part of the mounting structure, and the outer peripheral part of the filter assembly is buckled on the outer peripheral area of the mounting structure, and the middle part of the filter assembly is recessed to the direction away from the mounting area.

[0016] Further, the mounting structure is convexly arranged to the outside when extending from the outer periphery to the middle part;The filter assembly includes:

[0017] First filter part, gradually recessed to the outside during the extension from the outer periphery to the middle part, buckled on the outer peripheral area of the mounting structure and arranged close to each other,

[0018] Second filter part, recessed to the outside during the extension from the inner periphery of the first filter part to the middle part, recessed on the inner side of the second filter part, and the notch of the recess covers the mounting area.

[0019] Further, the filter assembly includes an assembly part arranged on the inner side of the second filter part;

[0020] The mounting area of the mounting structure is provided with a mounting part, which is rotatably connected with the assembly part and located in the cavity.

[0021] Further, the mounting area of the mounting structure is provided with a fixing hole, the air duct device comprises a fan motor and a fixing member, the fan motor is arranged in the air duct shell on the other side of the mounting structure, one end of the fixing member is connected with the fan motor by penetrating the fixing hole, and the other end of the fixing member is located in the cavity.

[0022] Further, the mounting structure comprises a support plate and an annular net rack arranged on the periphery of the support plate, the mounting area is located on the support plate, the mounting part is arranged on the support plate, and the fixing hole is arranged on the support plate on the periphery of the mounting part.

[0023] Further, the filter assembly comprises an adsorption unit and a filter screen, the adsorption unit is filled in the containing cavity in the first filter part and the second filter part, and the filter screen is arranged on the outer side of the first filter part and the second filter part away from the mounting structure.

[0024] Further, the air duct shell is a volute, the first openings of the air duct device are arranged on two opposite side walls on the two sides of the peripheral wall of the volute, and the first openings are air inlets, and the second opening arranged on the peripheral wall of the volute is an air outlet.

[0025] The utility model also provides a kind of range hood, comprising smoke machine box body and the air duct device of any of the above, and the air duct device is arranged in the smoke machine box body.

[0026] After adopting the above technical scheme, the utility model has the following beneficial effects compared with prior art.

[0027] (1) the range hood of the utility model, because the mounting area of the mounting structure and the filter assembly have a cavity, the installation parts of fan motor or filter assembly can be avoided, and when the oil fume is too large, the filter assembly opposite the mounting area can be prevented from being blocked by accumulated oil fume, so that the filtering effect of the filter assembly can be improved, and the purification effect of the range hood can be improved.

[0028] (2) the mounting structure of the utility model is outwardly convex, and the filter assembly is outwardly concave on the opposite side of the mounting structure, so that smoke can be more efficiently sucked or discharged, the first filter part is gradually outwardly concave from the outer periphery to the inner periphery, and is buckled on the outer periphery of the mounting structure, so that the distance is kept short, the filter assembly has better air inlet and outlet speed, the second filter part is outwardly concave on the inner side when extending from the first filter part to the inner periphery, and forms a groove, so that the distance with the middle area of the mounting structure is kept, the distance is prevented from being too short, and the second filter part is prevented from being blocked by too much oil fume.

[0029] The specific embodiment of the utility model is described in further detail below in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0031] Figure 1 This is a schematic diagram of a range hood according to the present invention;

[0032] Figure 2 This is a utility model Figure 1 A schematic diagram of the side of the box opening;

[0033] Figure 3 This is a utility model Figure 2 Cross-sectional schematic diagram;

[0034] Figure 4 This is a schematic diagram of a duct device according to the present invention;

[0035] Figure 5 This is a utility model Figure 4 Cross-sectional schematic diagram;

[0036] Figure 6 This is a schematic diagram of an air duct device after the filter assembly has been removed;

[0037] Figure 7 This is a cross-sectional schematic diagram of another air duct device of this utility model;

[0038] Figure 8 This is a schematic diagram of a partial structure of a filter component according to the present invention;

[0039] Figure 9 This is a schematic diagram of a filter component according to this utility model from another angle.

[0040] In the diagram: 1. Duct housing; 11. First opening; 12. Second opening; 2. Installation structure; 21. Annular mesh frame; 22. Support plate; 221. Mounting part; 2211. Snap-fit ​​part; 2212. Positioning part; 222. Fixing hole; 3. Filter assembly; 31. Filter part; 311. First filter part; 312. Second filter part; 313. Connecting plate; 314. Connecting arm; 315. Receiving cavity; 32. Assembly part; 321. Positioning seat; 322. Slot; 33. Filter screen; 34. Cavity; 4. Fan motor; 5. Smoke hood housing; 51. Housing opening; 52. Connecting part.

[0041] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but are merely to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0043] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] As shown in Figures 1 to 9 The present application provides an air duct device of a range hood, comprising an air duct shell 1, a mounting structure 2 and a filter assembly 3.

[0046] In the drawings of the present application, it should be noted Figure 5 and Figure 7 The cutting direction is different.

[0047] The air duct shell 1 is provided with a first opening 11. The shape, number and the like of the first opening 11 are not specifically limited, and can be adjusted according to actual needs. The first opening 11 can be used for air inlet, or can be used for air outlet. The number of the first opening 11 can be one or more.

[0048] The installation structure 2 is arranged in the first opening 11 of the air duct shell 1, and oil fume or air enters or exits the air duct from the installation structure 2. That is, the installation structure 2 does not block the first opening 11. The filter assembly 3 is arranged on one side of the installation structure 2 and used for filtering oil fume. The filter assembly 3 can be arranged on the outer side of the installation structure 2 or on the inner side of the installation structure 2.

[0049] The installation structure 2 has an installation area for installing the fan motor 4 and / or the filter assembly 3, and a cavity 34 is formed between the installation area and the opposite filter assembly 3, which facilitates smooth flow and filtration of oil fume.

[0050] The oil fume machine has the cavity 34 between the installation area of the installation structure 2 and the filter assembly 3, which can avoid the installation part 221 of the fan motor 4 or the filter assembly 3, and can prevent oil fume accumulation from blocking the filter assembly 3 opposite to the installation area when the oil fume is too large, so that the filtering effect of the filter assembly 3 and the purification effect of the oil fume machine are improved.

[0051] In one scheme, the filter assembly 3 is recessed away from the installation structure 2 opposite the installation area, and the cavity 34 is formed between the installation structure 2. The installation area of the installation structure 2 can extend into the recessed part of the middle area of the filter assembly 3, and can also be close to the opening of the recessed part of the filter assembly 3.

[0052] In another scheme, the installation area of the installation structure 2 is recessed away from the filter assembly 3, and the cavity 34 is formed between the filter assembly 3. The middle area of the filter assembly 3 can be close to the opening of the recessed part of the installation structure 2, and can also extend into the recessed part of the installation structure 2, but has a certain distance between the opposite walls of the recessed part.

[0053] In another scheme, the filter assembly 3 and the installation area of the installation structure 2 are respectively recessed away from each other, and the cavity 34 is formed in the middle of the filter assembly 3 and the installation structure 2.

[0054] The cavity 34 has a certain depth between the filter assembly 3 and the installation area.

[0055] Further, the filter assembly 3 is detachably arranged on the outer side of the installation structure 2, which facilitates installation and replacement of the filter assembly 3. The detachable connection mode of the filter assembly 3 and the installation structure 2 is not limited to clamping connection, threaded connection, but can also be other connection modes.

[0056] When the first opening 11 is an air inlet, the fan in the air duct device operates, which can drive the indoor oil fume into the filter assembly 3 for filtration and purification, and the purified air enters the air duct shell 1 and is discharged to the indoor from the second opening 12 of the air duct shell 1.

[0057] When the first opening 11 is an air outlet, the fan in the air duct device operates, which can drive the indoor oil fume into the air duct shell 1 from the second opening 12 of the air duct shell 1, and then the oil fume is discharged to the indoor after being filtered and purified by the filter assembly 3.

[0058] The fan is installed in the air duct shell 1 inside the mounting structure 2, and the axial direction of the fan is arranged along the inside and outside direction of the filter assembly 3.

[0059] To solve the above technical problems, the mounting area is arranged in the middle part of the mounting structure 2.

[0060] The outer peripheral part of the filter assembly 3 is close to the outer peripheral area of the mounting structure 2, which can ensure a certain ventilation effect and quickly intake or exhaust air, and the middle part of the filter assembly 3 is recessed away from the outside of the mounting structure 2, which avoids the problem of blockage caused by the close fit of the filter assembly 3 to the mounting structure 2 when the oil fume is too large.

[0061] The mounting structure 2 is outwardly protrudingly arranged when extending from the outer periphery to the middle part.

[0062] The filter assembly 3 includes a filter part 31.

[0063] The inside of the first filter part 311 is gradually recessed outwardly during the extension from the outer periphery to the middle part, and is arranged on the outer peripheral area of the mounting structure 2 and close to each other.

[0064] The second filter part 312 is located at the inner circumferential side of the first filter part 311 and is recessed outwardly during extension from the inner circumferential edge of the first filter part 311 to the middle part. A groove is formed at the inner side of the second filter part 312, and the groove opening covers the mounting area.

[0065] The mounting area of the mounting structure 2 is away from the groove bottom, so as to avoid sticking of the mounting area of the mounting structure 2 and the second filter part 312 when the oil fume is large, thereby ensuring the filtering effect of the filtering assembly 3.

[0066] The inner sides of the first filter part 311 and the second filter part 312 are connected in a stepped manner from the outer circumferential edge to the inner circumferential edge, and the whole is covered on the outer side of the mounting structure 2. The first filter part 311 is closer to the mounting structure 2. The mounting area is opposite to part of the second filter part 312. The groove opening extends beyond the mounting area, so that air can flow through the groove and then enter the second filter part 312 for filtering.

[0067] The first filter part 311 and the second filter part 312 themselves have large gaps to allow air to pass through while blocking large oil fume particles and purifying harmful substances and / or odors of the oil fume.

[0068] Further, the outer circumferential area of the mounting structure 2 is gradually outwardly convexly arranged and close to the first filter part 311, so as to more efficiently smoke or exhaust smoke. The mounting area of the mounting structure 2 in the middle part extends in a substantially planar manner and is located at the groove opening of the groove, so as to block the groove opening.

[0069] The filtering assembly 3 further comprises an assembly part 32 arranged at the inner side of the second filter part 312. The mounting area of the mounting structure 2 is provided with a mounting part 221, which is rotationally connected with the assembly part 32.

[0070] The assembly part 32 and the mounting part 221 are both located in the cavity 34.

[0071] The mounting area of the mounting structure 2 is a planar area located at the groove opening of the groove. The mounting part 221 is arranged at the middle part of the planar area of the filtering assembly 3. The mounting structure 2 is further provided with a plurality of positioning holes for ensuring accurate installation with the filtering assembly 3.

[0072] The mounting structure 2 comprises a ring-shaped net rack 21 and a support plate 22, and the ring-shaped net rack 21 is connected with the outer circumferential edge of the support plate 22 and the edge of the first opening 11, respectively. The ring-shaped net rack 21 can be used for ventilation of the mounting structure 2.

[0073] The mounting part 221 is rotationally connected with the filtering assembly 3.

[0074] The mounting portion 221 includes a clamping piece 2211 and a positioning piece 2212, both of which are arranged on the support plate 22. The clamping piece 2211 is arranged on the outer periphery of the positioning piece 2212 and protrudes towards the filter assembly 3.

[0075] The assembly portion 32 includes a positioning seat 321 and a clamping groove 322. The positioning seat 321 is provided with a mounting hole and is positioned and mounted with the positioning piece 2212 of the mounting portion 221. The clamping groove 322 is arranged on the outer periphery of the positioning seat 321 and is clamped with the clamping piece 2211 of the mounting portion 221. The clamping groove 322 extends a certain distance in the circumferential direction. One end of the clamping groove 322 is an inlet end, and the other end is a locking end.

[0076] During installation, the positioning seat 321 of the filter assembly 3 is aligned and inserted into the positioning piece 2212 of the mounting structure 2, the inlet end of the clamping groove 322 of the filter assembly 3 is aligned and inserted, then rotated, and the clamping piece 2211 is arranged in the locking end of the clamping groove 322, so that the filter assembly 3 is installed. During disassembly, rotate the filter assembly 3 in the opposite direction to disengage the clamping piece 2211 from the clamping groove 322, thereby disassembling the filter assembly 3.

[0077] Preferably, the positioning seat 321 is a protruding columnar structure.

[0078] The filter assembly 3 includes at least two stages of filtration, including an adsorption unit and a filter screen 33. The adsorption unit can be arranged close to the mounting structure 2, and the filter screen 33 can be arranged close to the outer side; or the filter screen 33 can be arranged close to the mounting structure 2, and the adsorption unit can be arranged close to the outer side. Other filter materials or different filter material arrangement positions can also be used, which can be adjusted according to the air inlet or air outlet of the air duct device, and is not limited to the arrangement mode shown in the drawings.

[0079] The air duct device includes a fan motor 4 and a fixing member.

[0080] One installation scheme of the fan motor 4 is that the mounting area of the mounting structure 2 is provided with a fixing hole 222 located on the outer periphery of the mounting portion 221. Specifically, the fixing hole 222 is arranged on the support plate 22. The fan motor 4 is arranged in the air duct shell 1 on the other side of the mounting structure 2, one end of the fixing member passes through the fixing hole 222 and is connected with the fan motor 4, and the other end of the fixing member is located in the cavity 34.

[0081] Preferably, the fixing hole 222 has a plurality of fixing holes arranged on the outer periphery of the mounting portion 221. The fixing member includes a screw or a bolt, and the screw head or the bolt head of the fixing member is located in the cavity 34.

[0082] Another installation scheme of the fan motor 4 is (not shown in the figure), the installation area of the installation structure 2 has a connecting column extending outwardly, and the connecting column is provided with a fixing hole. The fixing member is fixed with the fan motor through the fixing hole. Part of the connecting column and / or the fixing member is located in the cavity.

[0083] The cavity 34 can make the filter assembly 3 play a role of avoiding the assembly part 32, the installation part 221, and the installation structure 2 of the fan motor 4.

[0084] The adsorption unit is filled in the containing cavity 315 in the first filter part 311 and the second filter part 312. The filter screen 33 is arranged on the outer side of the first filter part 311 and the second filter part 312 away from the installation structure 2.

[0085] The adsorption unit is a high-efficiency filter material such as activated carbon, which is used to adsorb harmful substances and odors in the oil fume. The filter screen 33 covers the outer side of the first filter part 311 and the second filter part 312, which is made of fine metal mesh or non-woven fabric material, and is used to block oil fume particles.

[0086] The filter assembly 3 includes a support net, and the support net has a containing cavity 315 inside. One side of the support net facing the installation structure 2 is mesh-shaped, and the other side away from the installation structure 2 is open, and the filter screen 33 covers the opening.

[0087] The support net includes at least three annular connecting plates 313 and a plurality of connecting arms 314. The plurality of connecting plates 313 are sequentially and spacedly sleeved. The connecting plate 313 in the middle divides the filter assembly 3 into a first filter part 311 and a second filter part 312. The containing cavities 315 in the first filter part 311 and the second filter part 312 can communicate with each other.

[0088] The plurality of connecting arms 314 are arranged in a circumferential and radial extension and are connected into a net, and the net is connected between the two adjacent connecting plates 313. The net is arranged in a recessed manner outwardly during the extension from the outer circumferential middle part of the filter assembly 3.

[0089] Specifically, the first filter part 311 and the second filter part 312 are respectively divided into 12 sub-area regions along the circumference through the connecting arms 314, so as to prevent different absorption efficiencies caused by uneven distribution of activated carbon particles.

[0090] The first filter part 311 and the second filter part 312 are made of plastic material. The first filter part 311 and the second filter part 312 are made of flame-retardant PP material, which is safer and more reliable. The gap between the adjacent connecting arms 314 is slightly larger than the diameter of the activated carbon particles, so that the activated carbon particles will not fall off, will not affect the smoke exhaust, and will not block the flue.

[0091] The air duct shell 1 is a volute, and the first openings 11 of the air duct device are respectively arranged on two opposite side walls on two sides of the peripheral wall of the volute. The second opening 12 is arranged on the peripheral wall of the volute, and a fan coaxially arranged with the filter assembly 3 is arranged in the volute. Preferably, the first openings 11 are air inlets, and the second opening 12 is an air outlet. The oil fume first passes through the non-woven fabric and then contacts the activated carbon particles, so that the filtering and adsorption effect is better.

[0092] The utility model also provides a kind of range hood, the range hood includes smoke machine box body 5 and the air duct device of any of the above, and the air duct device is arranged in the smoke machine box body 5.

[0093] The range hood includes an internal circulation type range hood, which does not need to punch holes in the user's home or does not need to communicate the air duct for outdoor exhaust of the user's home when installed. The oil fume is sucked into the range hood and purified by the filter assembly 3, and the purified air is discharged into the user's home.

[0094] The smoke machine box body 5 has a certain extension length of box mouth 51 on one side, and the air duct device is fixed on the inner wall of the smoke machine box body 5. The peripheral wall of the air duct shell 1 faces the box mouth 51. The first openings 11 are respectively located on the opposite two side walls of the air duct, and the air inlet direction is consistent with the length extension direction of the box mouth 51.

[0095] The second opening 12 of the air duct shell 1 is arranged on the other end of the peripheral wall of the air duct shell 1 and is arranged outside the side opposite to the box mouth 51 of the smoke machine box body 5, for discharging the filtered air to the outside of the range hood.

[0096] The outer wall of the air duct shell 1 is provided with a connecting portion 52, which is fixedly connected with the inner side wall of the smoke machine box body 5 through the connecting portion 52.

[0097] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above, it is not intended to limit the utility model. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the scope of the utility model technical solution. The implementation solutions in the above-mentioned embodiments can be further combined or replaced. Any simple modification, equivalent change and modification of the above-mentioned embodiments according to the technical essence of the utility model are still within the scope of the utility model.

Claims

1. A ducting arrangement for a range hood, characterized by, The wind duct device comprises: a wind duct shell provided with a first opening for air inlet or outlet; a mounting structure arranged in the first opening of the wind duct shell; a filter assembly mounted on one side of the mounting structure for filtering oil fume; the mounting structure is provided with a mounting area for mounting a fan motor and / or the filter assembly, and a cavity is formed between the mounting area and the filter assembly.

2. The wind duct device according to claim 1, wherein: the filter assembly is recessed away from the mounting structure at the opposite side of the mounting area, and the cavity is formed between the filter assembly and the mounting structure, or the mounting area of the mounting structure is recessed away from the filter assembly, and the cavity is formed between the mounting area and the filter assembly.

3. The wind duct device according to claim 2, wherein: the mounting area is located at the middle part of the mounting structure, the outer peripheral part of the filter assembly is buckled on the outer peripheral area of the mounting structure, and the middle part of the filter assembly is recessed away from the mounting area.

4. The wind duct device according to claim 3, wherein: the mounting structure is outwardly protruded when extending from the outer periphery to the middle part; and the filter assembly comprises: a first filter part which is gradually recessed outwardly during the extension from the outer periphery to the middle part, buckled on the outer peripheral area of the mounting structure and arranged close to each other; a second filter part which is recessed outwardly during the extension from the inner periphery of the first filter part to the middle part, and a groove is formed on the inner side of the second filter part, and the groove opening covers the mounting area.

5. The wind duct device according to claim 4, wherein: the filter assembly comprises an assembly part arranged on the inner side of the second filter part; the mounting area of the mounting structure is provided with a mounting part which is rotationally connected with the assembly part and located in the cavity.

6. The wind duct device according to claim 5, wherein: the mounting area of the mounting structure is provided with a fixing hole, the wind duct device comprises a fan motor and a fixing member, the fan motor is arranged in the wind duct shell on the other side of the mounting structure, one end of the fixing member is connected with the fan motor by penetrating the fixing hole, and the other end of the fixing member is located in the cavity.

7. The wind duct device according to claim 6, wherein: the mounting structure comprises a support plate and an annular net rack arranged on the outer periphery of the support plate, the mounting area is located on the support plate, the mounting part is arranged on the support plate, and the fixing hole is arranged on the support plate on the outer periphery of the mounting part.

8. The wind duct device according to claim 4, wherein: the filter assembly comprises an adsorption unit and a filter screen, the adsorption unit is filled in the accommodating cavity in the first filter part and the second filter part, and the filter screen is arranged on the outer side of the first filter part and the second filter part away from the mounting structure.

9. The wind duct device according to any one of claims 1-4, wherein: The air duct shell is a volute shell, and the first openings of the air duct device are respectively arranged on two opposite side walls on two sides of the peripheral wall of the volute shell, serving as air inlets; and the peripheral wall of the volute shell is provided with a second opening, serving as an air outlet.

10. A range hood characterized by, The smoke machine comprises a smoke machine box body and the air duct device according to any one of claims 1-9, and the air duct device is arranged in the smoke machine box body.

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