A range hood with multi-zone active self-cleaning structure

Abstract

The utility model provides an oil -smog exhauster with multi -region activity self -cleaning structure, include: fume collecting hood, front panel, filter screen subassembly, self -cleaning module, self -cleaning drive assembly, water washing module and control center: air intake structure, filter screen subassembly and self -cleaning module correspond to be provided with at least two groups, control center is used for controlling self -cleaning drive assembly makes self -cleaning module relative filter screen subassembly activity, and the water washing output member of water washing module sets up in self -cleaning module, and water washing module is used to form cleaning fluid or cleaning steam, and is output to at least one place of air intake structure, filter screen subassembly or self -cleaning module through water washing output member, the utility model discloses, and the multi -region corresponding design of cleaning module and filter screen subassembly can realize the one -by -one or synchronous cleaning to different air intake area and filter structure, avoids the time -consuming longer drawback of single self -cleaning module activity covering entire front panel, significantly improves cleaning efficiency and washing rate.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a range hood with a multi-zone active self-cleaning structure. Background Technology

[0002] Existing range hoods have detachable filter screens with mesh or slits in the smoke collection hood. After use, grease adheres to the inside and outside of the casing and the filter screen. The method of cleaning the grease is static, using the slope of the filter screen to allow the oil to gradually flow into the oil collection box due to gravity. This method leaves a large amount of grease on the mesh and casing. Only a small amount of waste oil flows into the oil collection box, while most of it sticks to the oil filter screen or filter plate, requiring frequent cleaning. This affects the appearance, easily breeds bacteria, and reduces the oil fume adsorption effect.

[0003] Currently, most range hood cleaning is done manually, and removing grease is a very time-consuming and laborious household chore. Moreover, the longer the grease has been there, the harder it is to clean, requiring frequent cleaning. Many users either forget to clean it due to busy work schedules or neglect maintenance because the cleaning process is tedious and complicated, ultimately leading to a continuous decline in equipment performance and a deterioration in hygiene.

[0004] Many users forget to clean their range hoods or don't know how. Therefore, there's a need for a range hood that can automatically clean and remove grease at any time. A technology that can proactively, efficiently, and automatically remove grease from filters and key components would completely free users' hands and improve the hygiene and performance of the equipment. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention is proposed.

[0006] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a range hood with a multi-zone active self-cleaning structure, including: a smoke collection hood, a front panel, a filter assembly, a self-cleaning module, a self-cleaning drive assembly, a water washing module, and a control center. The front panel is located on the front side of the smoke hood, and the front panel has an air inlet structure that communicates with the inner cavity of the smoke hood; the filter assembly is installed close to the air inlet structure; the filter assembly has filter holes or filter grooves; at least two sets of the air inlet structure, the filter assembly and the self-cleaning module are provided respectively. The control center is used to control the self-cleaning drive component to make the self-cleaning module move relative to the filter assembly; the water washing output component of the water washing module is disposed on the self-cleaning module; the water washing module is used to generate cleaning fluid or cleaning steam and output it through the water washing output component to at least one of the air inlet structure, the filter assembly or the self-cleaning module.

[0007] Optionally, the self-cleaning drive component is used to drive the self-cleaning module to move vertically or horizontally along the filter assembly.

[0008] Optionally, the self-cleaning module has an elongated structure and extends vertically or horizontally along the filter assembly; the water washing output component is a pipe structure extending along the self-cleaning module, and the pipe structure has a plurality of spray holes; the self-cleaning module is equipped with a scraper, which is attached to the surface of the front panel and / or the filter assembly.

[0009] Optionally, the filter assembly includes at least two filter plates; multiple water washing output components are provided, which are disposed between the front panel and the first filter plate, or between two adjacent filter plates, or on the rear side of the last filter plate.

[0010] Optionally, the self-cleaning module is provided with a slider connecting seat; the self-cleaning drive assembly includes a drive motor, a drive slide rail, and a drive screw; the slider connecting seat is slidably disposed on the drive slide rail and threadedly connected to the drive screw; the drive motor is used to drive the drive screw to rotate and to move the slider connecting seat along the extension direction of the drive screw.

[0011] Optionally, the self-cleaning module is provided with an anti-detachment clip; the self-cleaning drive assembly further includes a limiting guide rod; the limiting guide rod is arranged parallel to and spaced apart from the drive slide rail.

[0012] Optionally, several sets of the air intake structure, filter assembly and self-cleaning module are arranged along the extension direction of the drive screw; the drive screw is provided with several independently machined drive thread segments; each drive thread segment is threadedly connected to the sliding connection seat of a set of self-cleaning modules.

[0013] Optionally, the air intake structure, filter assembly, and self-cleaning module are arranged in two sets along the extension direction of the drive screw; the drive screw has two independently machined drive thread sections; the two drive thread sections have opposite rotation directions, which allows the two self-cleaning modules to move from the end of the drive screw toward the middle, or to move from the middle of the drive screw toward both ends.

[0014] Optionally, the water washing module is equipped with a heating module for generating high-temperature cleaning fluid or high-temperature cleaning steam; a spiral telescopic tube section is provided between the water washing module and the water washing output component; when the self-cleaning module moves, the spiral telescopic tube section can stretch or contract.

[0015] Optionally, the air intake structure is a plurality of filter holes or filter grooves opened on the front panel; Alternatively, the air intake structure may be an independent air intake structure in the shape of a notch in the front panel; Alternatively, the air intake structure includes an air inlet and an air intake baffle; the air inlet is located on the front panel, and the air intake baffle is spaced out and positioned behind the air inlet; the air intake baffle is positioned between the air inlet and the filter assembly; the air intake baffle and the air inlet form an air intake channel.

[0016] The beneficial effects of this invention are as follows: By incorporating a movable self-cleaning module and a matching water-washing module, active and automated cleaning of key areas such as the filter assembly and air intake structure is achieved, effectively solving the problem of oil residue caused by traditional range hoods relying on gravity for oil removal. This structure can continuously or periodically remove attached oil stains during operation, significantly reducing the frequency and difficulty of manual cleaning and preventing long-term accumulation of oil stains that could breed bacteria or affect smoke extraction efficiency. Simultaneously, the intelligent coordination of the cleaning process through the control center improves the hygiene level and reliability of the equipment, truly freeing the user's hands while balancing aesthetics and practicality. Furthermore, the self-cleaning module and filter assembly adopt a multi-area corresponding design, enabling individual or simultaneous cleaning of different air intake areas and filter structures. This avoids the drawback of a single self-cleaning module covering the entire front panel, which is time-consuming. The motion cleaning method combined with fluid rinsing effectively removes stubborn oil stains from dead corners and inside the mesh, significantly improving cleaning efficiency and washing rate.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a range hood according to one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of a center-draft range hood with the smoke collection hood and fan cabinet concealed. Figure 3 for Figure 1 An exploded view of the concealed smoke collection hood and fan cabinet of a center-draft range hood; Figure 4 for Figure 1 Cross-sectional view of a center-draft range hood with the smoke collection hood and fan cabinet concealed. Figure 5 This is a schematic diagram of the structure of a range hood according to another embodiment of the present invention; Figure 6 for Figure 5 An exploded view of the concealed smoke collection hood and fan cabinet of a center-draft range hood; Figure 7 for Figure 5 A cross-sectional view of a central-range hood with the smoke collection hood and fan cabinet concealed.

[0019] Explanation of key component symbols: 10. Smoke hood; 20. Front panel; 21. Air inlet structure; 211. Air inlet; 212. Air inlet baffle; 30. Filter assembly; 40. Self-cleaning module; 41. Slider connector; 42. Anti-detachment clip; 50. Self-cleaning drive assembly; 51. Drive motor; 52. Drive slide rail; 53. Drive screw; 54. Limiting guide rod; 60. Water washing module; 61. Water washing output component; 62. Spiral telescopic tube section. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Example Reference Figures 1 to 7This utility model proposes a range hood with a multi-zone active self-cleaning structure, comprising: a smoke collection hood 10, a front panel 20, a filter assembly 30, a self-cleaning module 40, a self-cleaning drive assembly 50, a water washing module 60, and a control center. The front panel 20 is located on the front side of the smoke hood 10. The front panel 20 is provided with an air inlet structure 21 that connects to the inner cavity of the smoke hood 10. The filter assembly 30 is installed close to the air inlet structure 21. The filter assembly 30 has filter holes or filter grooves. At least two sets of the air inlet structure 21, the filter assembly 30 and the self-cleaning module 40 are provided respectively. The control center is used to control the self-cleaning drive assembly 50 to move the self-cleaning module 40 relative to the filter assembly 30; the water washing output component 61 of the water washing module 60 is disposed on the self-cleaning module 40; the water washing module 60 is used to generate cleaning fluid or cleaning steam and output it through the water washing output component 61 to at least one of the air inlet structure 21, the filter assembly 30 or the self-cleaning module 40.

[0025] In this invention, by setting up a movable self-cleaning module 40 and a matching water washing module 60, active and automated cleaning of key areas such as the filter assembly 30 and the air intake structure 21 is achieved, effectively solving the problem of oil residue caused by traditional range hoods relying on gravity for oil removal. This structure can continuously or periodically remove attached oil stains during operation, significantly reducing the frequency and difficulty of manual cleaning and preventing long-term accumulation of oil stains that breed bacteria or affect the efficiency of smoke extraction. At the same time, the intelligent coordination of the cleaning process by the control center improves the hygiene level and reliability of the equipment, truly freeing the user's hands and taking into account both aesthetics and practicality. Furthermore, the self-cleaning module 40 and the filter assembly 30 adopt a multi-area corresponding design, which can realize the cleaning of different air intake areas and filter structures one by one or simultaneously, avoiding the disadvantage of the time-consuming process of a single self-cleaning module 40 covering the entire front panel 20. The motion cleaning method combined with fluid flushing effectively removes stubborn oil stains in dead corners and inside the mesh, significantly improving cleaning efficiency and cleaning rate.

[0026] In this embodiment, the self-cleaning drive component 50 is used to drive the self-cleaning module 40 to move vertically or horizontally along the filter assembly 30. The movement mode of the self-cleaning module 40 moving vertically or horizontally is clearly defined. This linear reciprocating motion mode has simple control logic and reliable drive, ensuring that the self-cleaning module 40 (and its water washing output component 61) performs a comprehensive, dead-zone-free scanning cleaning of the surface of the filter assembly 30, achieving extremely high cleaning coverage whether it is vertical or horizontal scraping.

[0027] Specifically, the self-cleaning module 40 has an elongated structure and extends vertically or horizontally along the filter assembly 30; the water washing output component 61 is a pipe structure extending along the self-cleaning module 40, and the pipe structure has several spray holes. The elongated self-cleaning module 40, together with the extended pipe with multiple spray holes, forms a "cleaning scraper" or "cleaning beam". This design can form a uniform cleaning curtain throughout its entire stroke, achieving large-area synchronous and uniform spraying, eliminating cleaning blind spots, greatly improving the cleaning efficiency of a single stroke, and shortening the overall cleaning time.

[0028] Furthermore, the piping structure can be silicone tubing, metal tubing, or a cavity structure molded into the self-cleaning module 40. Silicone tubing offers good flexibility and corrosion resistance; metal tubing provides high structural strength and durability; and molded cavities offer a compact structure, high integration, and a clean appearance. This provides flexible implementation plans for different product positioning and cost considerations, ensuring the feasibility and economy of the solution.

[0029] In some embodiments, the self-cleaning module 40 is equipped with a scraper that is attached to the surface of the front panel 20 and / or the filter assembly 30. The scraper closely conforms to the uneven surface of the filter (such as mesh / groove), allowing the self-cleaning module 40 to perform steam cleaning along the surface of the filter assembly 30 while simultaneously scraping off oil and water, thus improving the self-cleaning performance of the filter assembly 30 and the air inlet structure 21.

[0030] In this embodiment, the filter assembly 30 includes at least two layers of filter plates; multiple water washing output components 61 are provided, disposed between the front panel 20 and the first layer of filter plates, or between two adjacent filter plates, or on the rear side of the last layer of filter plates. By placing the water washing output components 61 at key positions between the multiple layers of filter plates, double-sided or precise directional rinsing of each layer of filter plates can be achieved, thoroughly solving the problem of difficult cleaning of oil stains inside the multi-layer structure, and ensuring a clean effect inside and out even under multi-layer filtration conditions.

[0031] In this embodiment, the self-cleaning module 40 is provided with a slider connecting seat 41; the self-cleaning drive assembly 50 includes a drive motor 51, a drive slide rail 52, and a drive screw 53; the slider connecting seat 41 is slidably disposed on the drive slide rail 52 and threadedly connected to the drive screw 53; the drive motor 51 is used to drive the drive screw 53 to rotate and to move the slider connecting seat 41 along the extension direction of the drive screw 53. It has the advantages of precise transmission, smooth operation, and strong load capacity. It can provide stable and reliable linear motion power for the self-cleaning module 40, ensuring that it moves smoothly and accurately under load (such as with a water pipe), thereby ensuring the uniformity and effectiveness of the cleaning process. At the same time, this structure has low noise and a long service life.

[0032] Furthermore, the self-cleaning module 40 is equipped with an anti-detachment jamming part 42; the self-cleaning drive assembly 50 also includes a limiting guide rod 54; the limiting guide rod 54 is arranged parallel to and spaced apart from the drive slide rail 52. By adding the anti-detachment jamming part 42 and the limiting guide rod 54 arranged parallel to the drive slide rail 52, the stability and anti-deviation capability of the self-cleaning module 40 during movement are significantly improved. This design effectively prevents the module from derailing, jamming, or shaking during high-speed movement or frequent reversals, ensuring the accuracy of the cleaning path and extending the service life of the mechanism.

[0033] In this embodiment, several sets of air inlet structures 21, filter assemblies 30, and self-cleaning modules 40 are arranged along the extension direction of the drive screw 53. The drive screw 53 has several independently machined drive thread segments. Each drive thread segment is threadedly connected to the sliding connection seat of a set of self-cleaning modules 40. By machining multiple independent drive thread segments on a single drive screw 53 and having each segment drive a self-cleaning module 40, integrated synchronous driving of multiple cleaning modules is achieved. This structure saves space, simplifies the transmission system, facilitates collaborative work of multiple modules, and improves cleaning efficiency. It is especially suitable for range hoods with wide openings or multiple air inlets 211. Furthermore, compared to the thread segment structure of the entire drive screw 53, the independent multi-segment drive thread segments have a simpler processing technology, higher processing precision, and lower defect rate.

[0034] In some embodiments, the air inlet structure 21, filter assembly 30, and self-cleaning module 40 are arranged in two sets along the extension direction of the drive screw 53. The drive screw 53 has two independently machined drive thread sections. The two drive thread sections rotate in opposite directions, allowing the two self-cleaning modules 40 to move from the ends of the drive screw 53 toward the center, or from the center of the drive screw 53 toward both ends. The layout of the two sets of air inlets and self-cleaning modules 40, with the use of two drive thread sections rotating in opposite directions, allows the two modules to move synchronously from both ends toward the center or from the center toward both ends. This layout greatly optimizes the cleaning path and time, avoiding the problem of excessive time spent by a single module traversing the entire area, and is particularly suitable for the efficient symmetrical cleaning requirements of the dual-inlet 211 model. Simultaneously, the design of drive thread sections with opposite rotation directions at both ends allows the sliding connecting seats of the two self-cleaning modules 40 to be installed from the two ends of the drive screw, simplifying the installation process.

[0035] In this embodiment, the water washing module 60 is equipped with a heating module for generating high-temperature cleaning fluid or high-temperature cleaning steam. By providing the heating module, high-temperature cleaning fluid or steam can be supplied. High temperatures significantly enhance the dissolution and emulsification of stubborn oil stains, greatly improving cleaning efficiency and cleanliness. Compared to cold water cleaning, high-temperature cleaning also has the added benefit of sterilization and disinfection, further improving the hygiene level of the equipment and achieving a deep cleaning effect.

[0036] Furthermore, a spiral telescopic pipe section 62 is provided between the water washing module 60 and the water washing output component 61; when the self-cleaning module 40 moves, the spiral telescopic pipe section 62 can extend or retract. The spiral telescopic pipe section 62 cleverly solves the pipeline connection problem when the self-cleaning module 40 moves. It has good extensibility and flexibility, and can maintain a reliable water / steam supply at all times when the self-cleaning module 40 moves over a wide range, while avoiding problems such as entanglement, bending, wear, or even breakage that may occur with ordinary water pipes, greatly improving the reliability and service life of the water washing module 60.

[0037] Please see Figures 1 to 4 In some implementations, the air intake structure 21 is a structure with several filter holes or filter grooves opened on the front panel 20; or, the air intake structure 21 is a structure with an independent air inlet 211 in the shape of a notch opened on the front panel 20. Whether the entire front panel 20 is used as the filter surface (filter hole / groove structure) or an independent air inlet 211 is opened, this self-cleaning structure can effectively clean it, ensuring that the self-cleaning technology solution is compatible with different types and designs of range hood products, thus broadening its application range.

[0038] Please see Figures 5 to 7 In some embodiments, the air intake structure 21 includes an air inlet 211 and an air intake baffle 212. The air inlet 211 is located on the front panel 20, and the air intake baffle 212 is spaced out and positioned behind the air inlet 211. The air intake baffle 212 is positioned between the air inlet 211 and the filter assembly 30. The air intake baffle 212 and the air inlet 211 form an air intake channel. This layered design of the air intake structure 21 (air inlet 211 + air intake baffle 212) forms an effective primary channel for oil fume separation. Cleaning this structure allows for precise flushing of the inner wall of the air intake channel and the air intake baffle 212, preventing oil stains from accumulating and clogging the air intake channel. This ensures smooth airflow and air intake efficiency of the range hood, maintaining the performance of the equipment from the source. The front panel 20, through the combination of the air inlet 211 and the air intake baffle 212, effectively conceals the filter holes or filter grooves of the filter assembly 30, providing a more unified and consistent appearance.

[0039] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A range hood with a multi-zone active self-cleaning structure, characterized in that, include: The components include: a smoke hood (10), a front panel (20), a filter assembly (30), a self-cleaning module (40), a self-cleaning drive assembly (50), a water washing module (60), and a control center. The front panel (20) is disposed on the front side of the smoke hood (10), and the front panel (20) is provided with an air inlet structure (21) communicating with the inner cavity of the smoke hood (10); the filter assembly (30) is installed close to the air inlet structure (21); the filter assembly (30) is provided with filter holes or filter grooves; the air inlet structure (21), the filter assembly (30) and the self-cleaning module (40) are provided in at least two sets respectively; The control center is used to control the self-cleaning drive assembly (50) to make the self-cleaning module (40) move relative to the filter assembly (30); the water washing output component (61) of the water washing module (60) is disposed on the self-cleaning module (40); the water washing module (60) is used to generate cleaning fluid or cleaning steam and output it through the water washing output component (61) to at least one of the air inlet structure (21), the filter assembly (30) or the self-cleaning module (40).

2. The range hood with a multi-zone active self-cleaning structure according to claim 1, characterized in that: The self-cleaning drive assembly (50) is used to drive the self-cleaning module (40) to move vertically or horizontally along the filter assembly (30).

3. The range hood with a multi-zone active self-cleaning structure according to claim 2, characterized in that: The self-cleaning module (40) has a long strip structure and extends vertically or horizontally along the filter assembly (30); the water washing output component (61) is a pipe structure extending along the self-cleaning module (40), and the pipe structure has a plurality of spray holes; the self-cleaning module (40) is equipped with a scraper, which is attached to the surface of the front panel (20) and / or the filter assembly (30).

4. The range hood with a multi-zone active self-cleaning structure according to claim 2, characterized in that: The filter assembly (30) includes at least two filter plates; multiple water washing output components (61) are provided, which are located between the front panel (20) and the first filter plate, or between two adjacent filter plates, or on the rear side of the last filter plate.

5. The range hood with a multi-zone active self-cleaning structure according to claim 2, characterized in that: The self-cleaning module (40) is provided with a slider connecting seat (41); the self-cleaning drive assembly (50) includes a drive motor (51), a drive slide rail (52) and a drive screw (53); the slider connecting seat (41) is slidably disposed on the drive slide rail (52) and threadedly connected to the drive screw (53); the drive motor (51) is used to drive the drive screw (53) to rotate and to move the slider connecting seat (41) along the extension direction of the drive screw (53).

6. The range hood with a multi-zone active self-cleaning structure according to claim 5, characterized in that: The self-cleaning module (40) is provided with an anti-detachment clip (42); the self-cleaning drive assembly (50) also includes a limiting guide rod (54); the limiting guide rod (54) is arranged parallel to and spaced apart from the drive slide rail (52).

7. The range hood with a multi-zone active self-cleaning structure according to claim 5, characterized in that: Several sets of the air intake structure (21), filter screen assembly (30) and self-cleaning module (40) are arranged along the extension direction of the drive screw (53); the drive screw (53) is provided with several independently machined drive thread segments; each drive thread segment is threadedly connected to the sliding connection seat of a set of self-cleaning modules (40).

8. The range hood with a multi-zone active self-cleaning structure according to claim 5, characterized in that: The air intake structure (21), filter assembly (30), and self-cleaning module (40) are arranged in two sets along the extension direction of the drive screw (53); the drive screw (53) is provided with two independently machined drive thread sections; the two drive thread sections have opposite rotation directions, which allows the two self-cleaning modules (40) to move from the end of the drive screw (53) toward the middle, or to move from the middle of the drive screw (53) toward both ends.

9. The range hood with a multi-zone active self-cleaning structure according to claim 1, characterized in that: The water washing module (60) is equipped with a heating module for generating high-temperature cleaning fluid or high-temperature cleaning steam; a spiral telescopic tube section (62) is provided between the water washing module (60) and the water washing output component (61); when the self-cleaning module (40) moves, the spiral telescopic tube section (62) can be stretched or contracted.

10. The range hood with a multi-zone active self-cleaning structure according to claim 1, characterized in that: The air intake structure (21) is a plurality of filter holes or filter grooves opened on the front panel (20); Alternatively, the air intake structure (21) is an independent air intake (211) structure with a notch shape opened on the front panel (20); Alternatively, the air intake structure (21) includes an air inlet (211) and an air intake baffle (212); the air inlet (211) is opened on the front panel (20), and the air intake baffle (212) is spaced out and blocked on the rear side of the air inlet (211); the air intake baffle (212) is disposed between the air inlet (211) and the filter assembly (30); the air intake baffle (212) and the air inlet (211) form an air intake channel spaced apart.

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