Air cabinet structure and range hood

Abstract

The air cabinet structure comprises a cabinet body, the cabinet body is provided with an air inlet and an air outlet which are communicated, the air inlet is provided with a plurality of air inlet holes, the air inlet holes extend in the same direction, and the extending direction of the air inlet holes is perpendicular to the air outlet direction of the air outlet. In actual use, the air cabinet structure is mounted above a suspended ceiling, so that a noise source is far away from human ears as far as possible, a certain noise reduction effect is achieved, meanwhile, due to the fact that the extending direction of the air inlet holes is perpendicular to the air outlet direction of the air outlet, airflow entering the cabinet body can be rectified, impact of the airflow on the interior of a fan is weakened, and the noise reduction effect is improved. And the wind resistance of an internal flow field is reduced, so that the noise is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a wind cabinet structure and a range hood. Background Art

[0002] Today's range hoods all strive for high air volume. Given the same exhaust vent area, the greater the air volume, the higher the air velocity, and the greater the aerodynamic noise generated by the airflow. To reduce noise, the air cabinet (including the fan), which is the main sound source of the range hood, is generally placed above the ceiling, away from the human ear. This top-mounted air cabinet uses an upward air intake, further extending the distance from the sound source to the human ear. Although this can reduce operating noise, the noise is still relatively loud.

[0003] In order to further reduce noise, Chinese patent publication number CN119532788A discloses a smoking device, in which the air inlet of the wind cabinet of the device is provided with a strip grille, and the direction of the strip grille is parallel to the direction of the air outlet. Although this design method has weakened the impact of the inclined airflow on the impeller and the volute tongue compared to the case without the strip grille, and reduced some noise, the wind resistance of the flow field inside the fan is still relatively large, the fan speed is still relatively high, and the operating noise of the range hood cannot be reduced to the required target value. Therefore, there is still a need to further improve the noise reduction capability. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a wind cabinet structure and a range hood, aiming to further reduce the noise of the range hood during operation.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] On the one hand, the present invention provides a wind cabinet structure, including a cabinet body, the cabinet body is provided with a through air inlet and air outlet, the air inlet is provided with a plurality of air inlet holes, and the plurality of air inlet holes are extended in the same direction, and the extension direction of the air inlet holes is perpendicular to the air outlet direction of the air outlet.

[0007] Furthermore, it also includes a grille member, which is arranged at the air inlet, and the air inlet hole is opened on the grille member.

[0008] Furthermore, the grille member includes a mounting frame and a plurality of grilles arranged side by side and spaced apart in the mounting frame. The length direction of the grilles is perpendicular to the air outlet direction of the air outlet, and the spacing area between two adjacent grilles constitutes the air inlet.

[0009] Furthermore, the installation frame is a ring-shaped structure, and the lengths of the grid plates arranged from the center to the edge of the installation frame gradually decrease.

[0010] Furthermore, it also includes a wind cabinet adapter, which is connected to the air inlet, and the air inlet direction of the wind cabinet adapter is parallel or perpendicular to the air outlet direction of the air outlet.

[0011] In the second aspect, the present invention also provides a range hood, comprising a smoke duct, a smoke duct adapter, a front panel assembly and the above-mentioned wind cabinet structure, the upper end of the smoke duct is connected to the cabinet body, the lower end of the smoke duct is connected to the smoke duct adapter, and the smoke duct adapter is connected to the front panel assembly.

[0012] Furthermore, the cigarette pipe adapter includes a main body section, the main body section is provided with a first noise reduction structure, the first noise reduction structure includes a first sound-absorbing cotton and a first noise reduction hole, the first noise reduction hole is arranged through the wall surface of the main body section, and the first sound-absorbing cotton is wrapped around the outer wall of the main body section.

[0013] Furthermore, the cigarette pipe adapter further includes an extension section, which extends into the front panel assembly and is provided with a second noise reduction structure.

[0014] Furthermore, the second noise reduction structure includes a second sound-absorbing cotton and a second noise reduction hole. The second noise reduction hole is arranged through the wall surface of the extension section, and the second sound-absorbing cotton is wrapped around the outer wall of the extension section.

[0015] Furthermore, the second noise reduction structure includes a support frame, a noise reduction membrane and a mass block, the support frame is arranged on the outer wall of the extension section, the noise reduction membrane is arranged on the support frame, and the mass block is arranged on the noise reduction membrane.

[0016] Compared with the prior art, the present invention has the following advantages: a wind cabinet structure includes a cabinet body, the cabinet body is provided with a through air inlet and air outlet, the air inlet is provided with a plurality of air inlet holes, the plurality of air inlet holes are arranged in the same direction, and the extension direction of the air inlet holes is perpendicular to the air outlet direction of the air outlet. In actual use, the wind cabinet structure is installed high above the ceiling, thereby keeping the noise source as far away from human ears as possible, achieving a certain noise reduction effect. At the same time, because the extension direction of the air inlet holes is perpendicular to the air outlet direction of the air outlet, the airflow entering the cabinet body can be rectified, reducing the impact of the airflow on the interior of the fan, reducing the internal flow field wind resistance, and thus further reducing noise.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the installation of a range hood provided in a specific embodiment of the present invention;

[0020] Figure 2 A schematic structural diagram of a range hood provided by a specific embodiment of the present invention;

[0021] Figure 3 A schematic structural diagram of a wind cabinet structure provided in a specific embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the structure of the wind cabinet provided in a specific embodiment of the present invention Figure 1 (with wind cabinet adapter installed);

[0023] Figure 5 A schematic diagram of the structure of the wind cabinet provided in a specific embodiment of the present invention Figure 2 (with wind cabinet adapter installed);

[0024] Figure 6 A schematic structural diagram of a grille member in a wind cabinet structure provided by a specific embodiment of the present invention;

[0025] Figure 7 Schematic diagram of the assembly of the front panel assembly and the smoke pipe adapter in the range hood provided by the specific embodiment of the present invention Figure 1 ;

[0026] Figure 8 Schematic diagram of the assembly of the front panel assembly and the smoke pipe adapter in the range hood provided by the specific embodiment of the present invention Figure 2 ;

[0027] Figure 9 Schematic diagram of the assembly of the front panel assembly and the smoke pipe adapter in the range hood provided by the specific embodiment of the present invention Figure 3 ;

[0028] Figure 10 Schematic diagram of simulation of outlet flow comparing the present invention with the prior art.

[0029] Reference numerals

[0030] 1. Wind cabinet structure; 11. Cabinet body; 111. Air inlet; 1111. Air inlet hole; 112. Air outlet; 12. Grille; 121. Mounting frame; 122. Grille; 13. Wind cabinet adapter; 2. Front panel assembly; 21. Display module; 22. Sound-absorbing cavity; 3. Smoke duct; 4. Smoke duct adapter; 41. Main section; 411. First noise reduction hole; 412. First sound-absorbing cotton; 42. Extension section; 421. Second noise reduction hole; 422. Second sound-absorbing cotton; 423. Support frame; 424. Noise reduction membrane; 425. Mass block; 100. Ceiling; 200. Suspended ceiling; 300. Decorative cover; 400. Stove. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0037] like Figures 1 to 9 As shown, an embodiment of the present invention provides a range hood, comprising a smoke duct 3, a smoke duct adapter 4, a front panel assembly 2, and a wind cabinet structure 1. The wind cabinet structure 1 includes a cabinet body 11, which is provided with an air inlet 111 and an air outlet 112 extending therethrough. A ventilation passage is formed between the air inlet 111 and the air outlet 112, and a fan is arranged in the ventilation passage. The air inlet 111 is located at the top of the cabinet body 11, and the air outlet 112 is located on the side of the cabinet body 11. The air inlet 111 is provided with a plurality of air inlet holes 1111, which extend in the same direction, perpendicular to the direction of air discharge from the air outlet 112. The upper end of the smoke duct 3 is connected to the cabinet body 11, and the lower end of the smoke duct 3 is connected to the smoke duct adapter 4, which is in turn connected to the front panel assembly 2.

[0038] like Figure 1 and Figure 2As shown, the cabinet 11 is placed above the suspended ceiling 200 and is connected to the ceiling 100 by mounting brackets or screws and other components. The smoke pipe 3 can be telescopic or non-telescopic, arranged vertically along the wall and passing through the decorative cover 300. The front panel assembly 2 is located above the stove 400. The front panel assembly 2 includes a smoke hood and a control panel. The control panel is provided with a display module 21 and operation buttons.

[0039] In actual kitchen usage scenarios, when users perform cooking operations such as frying, stir-frying, and deep-frying to generate oil smoke, the oil smoke enters the cabinet 11 from the smoke hood through the smoke pipe 3 and is then discharged from the air outlet 112, forming a complete oil smoke extraction process.

[0040] Since the wind cabinet structure 1 is installed above the high ceiling 200, the noise source is kept as far away from the human ear as possible, which plays a role in preliminary noise reduction. At the same time, since the extension direction of the air inlet 1111 is perpendicular to the air outlet direction of the air outlet 112, the air flow entering the cabinet body 11 can be rectified, which reduces the impact of the air flow on the inside of the fan and reduces the internal flow field wind resistance, thereby further reducing the noise.

[0041] like Figure 3 and Figure 6 As shown, the wind cabinet structure 1 further includes a grille member 12, which is provided at the air inlet 111. The grille member 12 includes a mounting frame 121 and a plurality of grille pieces 122 arranged side by side and spaced apart within the mounting frame 121. The length direction of the grille pieces 122 is perpendicular to the air outlet direction of the air outlet 112, and the spaced area between two adjacent grille pieces 122 constitutes an air inlet hole 1111.

[0042] The size of the mounting frame 121 needs to be compatible with the air cabinet air inlet 111, and it can be firmly installed on the edge of the air inlet 111 to provide a reliable support and fixing foundation for the grille 122. Considering the high strength and corrosion resistance, the material of the mounting frame 121 can be stainless steel. Multiple grilles 122 are arranged side by side in the mounting frame 121, and their length direction is strictly perpendicular to the air outlet direction of the air outlet 112. The spacing area formed between adjacent grilles 122 is the air inlet 1111. The grille 122 is a thin sheet structure. The material of the grille 122 can be consistent with the mounting frame 121, and can also be flexibly selected according to actual needs. The number of grilles 122 can generally be selected from 3 to 7. Experimental verification shows that if there are less than 3, there will be no rectification effect. If there are more than 7, the flow field cross-sectional area will become smaller and the flow rate will also become smaller.

[0043] The grid 122 and the mounting frame 121 may be integrally formed or may be a split structure. If they are a split structure, they may be connected by welding, clamping or screwing.

[0044] In actual application scenarios, when the fumes generated by cooking in the kitchen enter the wind cabinet through the air inlet 111, the grille 122 arranged perpendicular to the air outlet direction of the air outlet 112 will effectively rectify the turbulent airflow. The originally disorderly airflow is guided into a regular flow direction when passing through the air inlet 1111 between the grilles 122, which significantly reduces the impact of the airflow on the internal components of the fan, thereby reducing the aerodynamic noise generated when the fan is running. At the same time, the rectified airflow makes the flow field inside the wind cabinet more uniform and stable, and the wind resistance is reduced. Under the same smoke exhaust volume requirement, the fan can run at a lower speed, further reducing the noise level and achieving energy-saving effects.

[0045] like Figure 6 As shown, the mounting frame 121 is annular, with the lengths of the grilles 122 gradually decreasing from the center to the edge of the mounting frame 121. In actual use, when oil smoke enters the air cabinet through the air inlet 111, this gradual length change of the grilles 122 can effectively balance the airflow speed at different locations.

[0046] The length gradient of the grille 122 can be customized based on the size and shape of the air inlet 111 and the actual operating parameters of the wind cabinet structure. For example, for a wind cabinet with a circular air inlet 111, a proportional gradient can be used, with the length of the grille 122 decreasing proportionally with increasing distance from the center of the air inlet 111. For a rectangular air inlet 111, the length of the grille 122 can be designed to be gradient along both the long and short sides, ensuring uniform and stable airflow in both directions.

[0047] The wind cabinet structure 1 further includes a wind cabinet adapter 13 , which is connected to the air inlet 111 . The air inlet direction of the wind cabinet adapter 13 is parallel or perpendicular to the air outlet direction of the air outlet 112 .

[0048] Specifically, the wind cabinet adapter 13 is tightly connected to the air inlet 111 via the mounting frame 121 of the grille member 12. The connection between the two must ensure sealing and stability to prevent oil smoke leakage and loosening of the connection. In actual implementation, the connection between the wind cabinet adapter 13 and the mounting frame 121 can be a threaded connection, a flange connection, or a snap connection.

[0049] The wind cabinet adapter 13 is curved, which can better adapt to the installation angle and position relationship between the smoke pipe 3 and the cabinet 11. The air inlet direction of the wind cabinet adapter 13 (that is, the direction in which the smoke pipe 3 passes the oil smoke into the wind cabinet adapter 13) is parallel or perpendicular to the air outlet direction of the air outlet 112. Figure 4 As shown, the air inlet direction of the wind cabinet adapter 13 is perpendicular to the air outlet direction of the air outlet 112. Figure 5As shown, the air inlet direction of the wind cabinet adapter 13 is parallel to the air outlet direction of the air outlet 112. This flexibility enables it to adapt to the layout of public flues in different family kitchens.

[0050] like Figure 7 and Figure 8 As shown, the smoke pipe adapter 4 includes a main body section 41, and the main body section 41 is provided with a first noise reduction structure. The first noise reduction structure includes a first sound-absorbing cotton 412 and a first noise reduction hole 411. The first noise reduction hole 411 is arranged through the wall surface of the main body section 41, and the first sound-absorbing cotton 412 is wrapped around the outer wall of the main body section 41.

[0051] The first noise reduction hole 411 can be circular, square or elliptical, and the aperture of the noise reduction hole is within a reasonable range. For example, a smaller aperture has a better suppression effect on high-frequency noise, and a larger aperture has a certain effect on low-frequency noise. The general aperture range is 1mm-5mm, and the hole spacing also needs to be adaptively designed. Too dense hole spacing may affect the structural strength of the main section 41, and too sparse hole spacing will have a poor noise reduction effect. The general hole spacing range is 5mm-25mm.

[0052] The first sound-absorbing cotton 412 is wrapped around the outer wall of the main body 41 to absorb the sound wave energy transmitted through the first noise reduction hole 411. The sound-absorbing cotton can be made of a material with good sound absorption and flame retardancy, such as glass fiber cotton or polyester fiber cotton, which is suitable for kitchen environments.

[0053] The first sound-absorbing cotton 412 can be closely attached to the outer wall of the main body section 41 by gluing, bundling or fixing with a slot.

[0054] In actual use, when cooking smoke flows through the main section 41 of the smoke pipe adapter 4, some of the noise generated by the airflow is transmitted through the wall surface of the main section 41. The first noise reduction holes 411 initially reflect, scatter, and diffract the noise, changing the propagation direction and energy distribution of the sound waves. Subsequently, the sound waves that pass through the first noise reduction holes 411 enter the first sound-absorbing cotton 412 and are absorbed by it, effectively reducing the noise radiated outward from the smoke pipe adapter 4.

[0055] It should be noted that the first noise reduction hole 411 may not be opened directly on the main body section 41, but an additional board may be designed on the wall of the main body section 41, the board having the first noise reduction hole 411, and the first sound-absorbing cotton 412 is wrapped around the periphery of the board.

[0056] The overall noise reduction performance of the range hood can be further improved through the synergistic noise reduction effect of the air cabinet structure 1 and the first noise reduction structure.

[0057] In one embodiment, the cigarette pipe adapter 4 further includes an extension section 42 . The extension section 42 extends into the front panel assembly 2 . The extension section 42 is provided with a second noise reduction structure.

[0058] like Figure 2 、 Figure 7 and Figure 8 As shown, in one embodiment, the second noise reduction structure includes a second sound-absorbing foam 422 and a second noise reduction hole 421. The second noise reduction hole 421 is provided through the wall of the extension section 42, and the second sound-absorbing foam 422 is wrapped around the outer wall of the extension section 42. The space between the wall with the second noise reduction hole 421 and the display module 21 of the front panel assembly 2 constitutes the sound absorption cavity 22 of the second noise reduction hole 421. It should be noted that the design of the second sound-absorbing foam 422 and the second noise reduction hole 421 is the same as that of the first sound-absorbing foam 412 and the first noise reduction hole 411, and a detailed description thereof will not be repeated here.

[0059] The overall noise reduction performance of the range hood can be further improved through the coordinated noise reduction effect of the wind cabinet structure 1, the first noise reduction structure and the second noise reduction structure.

[0060] like Figure 9 As shown, in one embodiment, another form of a second noise reduction structure is designed. Specifically, the second noise reduction structure includes a support frame 423, a noise reduction membrane 424 and a mass block 425. The support frame 423 is arranged on the outer wall of the extension section 42, the noise reduction membrane 424 is arranged on the support frame 423, and the mass block 425 is arranged on the noise reduction membrane 424.

[0061] The support frame 423 is a rigid support member that is fixed to the outer wall of the extension section 42 by welding, bolting, or integral molding. The support frame 423 can be an annular frame structure that surrounds the outer wall of the extension section 42 and can be made of metal (e.g., aluminum alloy, stainless steel).

[0062] The material of the noise reduction membrane 424 can be PET film, silicone film or nylon film, etc. The noise reduction membrane 424 is installed in the middle of the support frame 423 in a tight form. Specifically, it can be fixed to the support frame 423 by a mechanical clamp and maintain a certain tension.

[0063] The mass block 425 is a block-shaped component with a certain mass, which is fixed to the noise reduction membrane 424 by bonding, inlaying or mechanical connection. The mass block 425 can be made of metal (such as lead, iron) or plastic material, and can be cylindrical, square or ring-shaped.

[0064] The whole composed of the noise reduction membrane 424 and the mass block 425 will resonate at a specific frequency, thereby consuming the sound energy at the specific frequency. The overall resonance frequency can be adjusted by changing the mass of the mass block 425, thereby reducing noise at different frequencies.

[0065] like Figure 10 As shown, Figure 10The figure shows the simulation diagram of the outlet flow rate under the same condition that the wind cabinet adapter 13 is perpendicular to the outlet direction of the air outlet 112, in which the grid direction is perpendicular to the outlet direction of the air outlet 112 and the grid direction is parallel to the outlet direction of the air outlet 112. Figure 10 The middle picture a shows the simulation situation where the grid arrangement direction (i.e. the length direction of the grid sheet 122) is parallel to the air outlet direction of the air outlet 112. Figure 10 The simulation results in Figure b show the case where the rectifier grid is perpendicular to the outlet direction of the air outlet 112. The simulated flow field in the figure shows that the flow field is more evenly distributed when the rectifier grid is perpendicular to the outlet direction of the air outlet 112 than when the rectifier grid is parallel to the outlet direction of the air outlet 112. The simulation results show that at the same speed of 1020 rpm, the outlet flow rate in the perpendicular case is 33.6 m / s. 3 / min, while the outlet flow rate in the parallel case is only 31.9m 3 / min, the vertical air volume is larger at the same speed. In other words, the vertical air volume is smaller at the same speed and the noise is lower.

[0066] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A wind cabinet structure, characterized in that: The cabinet comprises a cabinet body, wherein the cabinet body is provided with a through air inlet and an air outlet, the air inlet is provided with a plurality of air inlet holes, and the plurality of air inlet holes are extended in the same direction, and the extension direction of the air inlet holes is perpendicular to the air outlet direction of the air outlet.

2. A wind cabinet structure according to claim 1, characterized in that: It also includes a grille member, which is arranged at the air inlet, and the air inlet holes are opened on the grille member.

3. A wind cabinet structure according to claim 2, characterized in that: The grille member includes a mounting frame and a plurality of grilles arranged side by side and spaced apart in the mounting frame. The length direction of the grilles is perpendicular to the air outlet direction of the air outlet, and the spacing area between two adjacent grilles constitutes the air inlet.

4. A wind cabinet structure according to claim 3, characterized in that: The installation frame is an annular structure, and the lengths of the grid plates arranged from the center to the edge of the installation frame gradually decrease.

5. The wind cabinet structure according to claim 1, characterized in that: It also includes an air cabinet adapter, which is connected to the air inlet, and the air inlet direction of the air cabinet adapter is parallel or perpendicular to the air outlet direction of the air outlet.

6. A range hood, characterized in that: It includes a smoke pipe, a smoke pipe adapter, a front panel assembly and the wind cabinet structure according to any one of claims 1 to 5, the upper end of the smoke pipe is connected to the cabinet body, the lower end of the smoke pipe is connected to the smoke pipe adapter, and the smoke pipe adapter is connected to the front panel assembly.

7. The range hood according to claim 6, characterized in that: The cigarette pipe adapter includes a main body section, which is provided with a first noise reduction structure. The first noise reduction structure includes a first sound-absorbing cotton and a first noise reduction hole. The first noise reduction hole is arranged through the wall surface of the main body section, and the first sound-absorbing cotton is wrapped around the outer wall of the main body section.

8. The range hood according to claim 6, characterized in that: The cigarette pipe adapter further includes an extension section, which extends into the front panel assembly and is provided with a second noise reduction structure.

9. The range hood according to claim 8, characterized in that: The second noise reduction structure includes a second sound-absorbing cotton and a second noise reduction hole. The second noise reduction hole is arranged through the wall surface of the extension section, and the second sound-absorbing cotton is wrapped around the outer wall of the extension section.

10. The range hood according to claim 8, characterized in that: The second noise reduction structure includes a support frame, a noise reduction membrane and a mass block, the support frame is arranged on the outer wall of the extension section, the noise reduction membrane is arranged on the support frame, and the mass block is arranged on the noise reduction membrane.

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