A wind cabinet structure and a range hood

Abstract

The application discloses a kind of wind cabinet structure and extractor hood, wind cabinet structure includes cabinet, cabinet is equipped with through air inlet and air outlet, air inlet is equipped with several air inlet holes, several air inlet holes are extended along the same direction and are set, the extension direction of air inlet hole is perpendicular to the air outlet direction of air outlet.In actual use, the installation mode of the upper part of high ceiling is used for the wind cabinet structure, so that the noise source is as far as possible from the ear, and a certain noise reduction effect is achieved, and since the extension direction of the air inlet hole is perpendicular to the air outlet direction of the air outlet, the airflow entering the cabinet can be straightened, the impact of the airflow on the inside of the fan is reduced, and the internal flow field wind resistance is reduced, so that the noise is further reduced.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a fan cabinet structure and a range hood. Background Technology

[0002] Modern range hoods prioritize high airflow. With the same suction inlet area, a larger airflow results in higher air velocity and greater aerodynamic noise. To reduce noise, the main noise source of the range hood (including the fan) is typically placed above the ceiling, moving the sound source away from the listener's ears. This top-mounted fan design further extends the distance the sound travels to the listener's ears. While this reduces operating noise, the noise level is still relatively high.

[0003] To further reduce noise, Chinese patent CN119532788A discloses a smoking device. The air inlet of the device's air handling unit is equipped with a strip grille, and the direction of the strip grille is parallel to the direction of the air outlet. Although this design reduces the impact of the inclined airflow on the impeller and volute tongue compared to the case without a strip grille, thus reducing some noise, the air resistance in the internal flow field of the fan is still relatively large, and the fan speed is still relatively high. The operating noise of the smoke machine has not been reduced to the required target value, so there is still a need to further improve the noise reduction capability. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fan cabinet structure and range hood, which aims to further reduce the noise of the range hood during operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On one hand, the present invention provides a fan cabinet structure, including a cabinet body, the cabinet body having a through air inlet and an air outlet, the air inlet having a plurality of air inlet holes, the plurality of air inlet holes extending in the same direction, the extending direction of the air inlet holes being perpendicular to the air outlet direction.

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

[0008] Furthermore, the grille includes a mounting frame and a plurality of side-by-side spaced grilles disposed within the mounting frame. The length direction of the grilles is perpendicular to the air outlet direction, and the gap between two adjacent grilles constitutes the air inlet.

[0009] Furthermore, the mounting frame has a ring-shaped structure, and the length of the grid plates arranged from the center of the mounting frame to the edge gradually decreases.

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

[0011] Secondly, the present invention also provides a range hood, including a flue, a flue adapter, a front panel assembly, and the aforementioned fan cabinet structure, wherein the upper end of the flue is connected to the cabinet body, the lower end of the flue is connected to the flue adapter, and the flue adapter is connected to the front panel assembly.

[0012] Furthermore, the flue 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 disposed 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 flue adapter also includes an extension section that extends into the front panel assembly, and the extension section 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 being disposed through the wall of the extension section, and the second sound-absorbing cotton being 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 disposed on the outer wall of the extension section, the noise reduction membrane is disposed on the support frame, and the mass block is disposed on the noise reduction membrane.

[0016] The beneficial effects of this invention compared to existing technologies are as follows: A fan cabinet structure includes a cabinet body with a through air inlet and an air outlet. The air inlet has several air inlet holes extending in the same direction, perpendicular to the air outlet's outlet direction. In practical use, the fan cabinet structure is installed high above the ceiling, thus keeping the noise source as far away from the listener's ears as possible, achieving a certain degree of noise reduction. Simultaneously, because the air inlet holes extend perpendicularly to the air outlet's outlet direction, the airflow entering the cabinet is rectified, reducing the impact of airflow on the fan's interior and lowering internal airflow resistance, thereby further reducing noise.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 An installation diagram of a range hood provided for a specific embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a range hood provided in a specific embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the blower unit provided in a specific embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the air handling unit structure provided in a specific embodiment of the present invention. Figure 1 (Equipped with a blower adapter);

[0023] Figure 5 A schematic diagram of the air handling unit structure provided in a specific embodiment of the present invention. Figure 2 (Equipped with a blower adapter);

[0024] Figure 6 This is a structural schematic diagram of the grille component in the air handling unit structure provided in a specific embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the assembly of the front panel assembly and the flue adapter in a range hood provided in a specific embodiment of the present invention. Figure 1 ;

[0026] Figure 8 This is a schematic diagram of the assembly of the front panel assembly and the flue adapter in a range hood provided in a specific embodiment of the present invention. Figure 2 ;

[0027] Figure 9 This is a schematic diagram of the assembly of the front panel assembly and the flue adapter in a range hood provided in a specific embodiment of the present invention. Figure 3 ;

[0028] Figure 10 This is a simulation diagram of the export flow rate compared with the prior art.

[0029] Figure Labels

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

[0031] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening 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 possible implementation.

[0037] like Figures 1 to 9 As shown, this embodiment of the invention provides a range hood, including a flue 3, a flue adapter 4, a front panel assembly 2, and a fan housing structure 1. The fan housing structure 1 includes a cabinet 11, within which are a through air inlet 111 and an air outlet 112, forming a ventilation channel. A fan is arranged in the ventilation channel. The air inlet 111 is located at the top of the cabinet 11, and the air outlet 112 is located on the side of the cabinet 11. The air inlet 111 has a plurality of air inlet holes 1111, which extend in the same direction, perpendicular to the air outlet direction of the air outlet 112. The upper end of the flue 3 is connected to the cabinet 11, and the lower end of the flue 3 is connected to the flue adapter 4, which is connected to the front panel assembly 2.

[0038] like Figure 1 and Figure 2As shown, the cabinet 11 is placed above the ceiling 200 and is connected to the ceiling 100 by mounting brackets or screws and other components. The flue 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 collection hood and a control panel. The control panel is equipped with a display module 21 and operation buttons.

[0039] In actual kitchen use scenarios, when users perform cooking operations such as frying, stir-frying, and deep-frying, the fumes are drawn from the fume hood through the fume pipe 3 into the air inlet 111 of the cabinet 11 and then discharged from the air outlet 112, forming a complete fume extraction process.

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

[0041] like Figure 3 and Figure 6 As shown, the air handling unit structure 1 also includes a grille 12, which is located at the air inlet 111. The grille 12 includes a mounting frame 121 and a plurality of parallel and spaced grille plates 122 arranged within the mounting frame 121. The length direction of the grille plates 122 is perpendicular to the air outlet direction of the air outlet 112, and the gap between two adjacent grille plates 122 forms an air inlet 1111.

[0042] The mounting frame 121 must be sized to fit the air inlet 111 of the air handling unit, ensuring a stable installation at the edge of the inlet 111 and providing reliable support and a secure foundation for the grating plates 122. Considering high strength and corrosion resistance, the mounting frame 121 can be made of stainless steel. Multiple grating plates 122 are arranged side-by-side at intervals within the mounting frame 121, their length direction strictly perpendicular to the air outlet direction of the outlet 112. The gaps between adjacent grating plates 122 form the air inlet holes 1111. The grating plates 122 are thin sheet structures; their material can be the same as the mounting frame 121 or flexibly selected according to actual needs. The number of grating plates 122 is generally selected from 3 to 7. Experiments have shown that fewer than 3 grating plates result in no rectification effect, while more than 7 grating plates reduce the flow field cross-sectional area and flow rate.

[0043] The grid plate 122 and the mounting frame 121 can be integrally formed or have a separate structure. If it is a separate structure, it can be connected by welding, snap-fit ​​or screws.

[0044] In practical applications, when cooking fumes enter the blower unit through the air inlet 111, the grating 122, positioned perpendicular to the air outlet 112, effectively rectifies the turbulent airflow. The originally disordered airflow is guided into a regular flow direction as it passes through the air inlet holes 1111 between the grating 122, significantly reducing the impact of the airflow on the internal components of the blower and thus reducing the aerodynamic noise generated during operation. Simultaneously, the rectified airflow makes the internal flow field of the blower unit more uniform and stable, reducing wind resistance. Under the same smoke extraction requirements, the blower can operate at a lower speed, further reducing noise levels and achieving energy savings.

[0045] like Figure 6 As shown, the mounting frame 121 has a ring-shaped structure, and the length of the gratings 122 arranged from the center to the edge of the mounting frame 121 gradually decreases. In actual use, when oil fumes enter the air handling unit through the air inlet 111, this design of gradually changing length of the gratings 122 can effectively balance the airflow velocity at different positions.

[0046] The gradual change in the length of the grating 122 can be customized based on the size and shape of the air inlet 111 and the actual working parameters of the air handling unit structure. For example, for an air handling unit with a circular air inlet 111, a proportional gradual change can be adopted, with the center of the air inlet 111 as the reference, and the length of the grating 122 decreasing proportionally as the distance from the center increases; for a rectangular air inlet 111, the gradual change in the length of the grating 122 can be designed for both the long and short sides, so that the airflow can enter evenly and stably in both directions.

[0047] The air handling unit structure 1 also includes an air handling unit adapter 13, which is connected to the air inlet 111. The air inlet direction of the air handling unit adapter 13 is parallel or perpendicular to the air outlet direction of the air outlet 112.

[0048] Specifically, the air handling unit adapter 13 is tightly connected to the air inlet 111 via the mounting frame 121 of the grille 12. The connection method must ensure sealing and stability to prevent oil fume leakage and loosening at the connection. In actual implementation, the connection method between the air handling unit adapter 13 and the mounting frame 121 can be threaded connection, flange connection, or snap-fit ​​connection, etc.

[0049] The fan unit adapter 13 is curved to better accommodate the installation angle and position of the flue pipe 3 and the cabinet 11. The air inlet direction of the fan unit adapter 13 (i.e., the direction in which the flue pipe 3 passes the fumes into the fan unit adapter 13) is parallel or perpendicular to the air outlet direction of the air outlet 112, such as... Figure 4 As shown, the air inlet direction of the air handling unit adapter 13 is perpendicular to the air outlet direction of the air outlet 112, as follows. Figure 5As shown, the air intake direction of the air handling unit 13 is parallel to the air outlet direction of the air outlet 112. This flexibility allows it to adapt to the layout of the common flue in different family kitchens.

[0050] like Figure 7 and Figure 8 As shown, the flue adapter 4 includes a main body section 41. 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 disposed through the wall 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. The diameter of the noise reduction hole should be within a reasonable range. For example, a smaller diameter has a better suppression effect on high-frequency noise, while a larger diameter has a certain effect on low-frequency noise. Generally, the diameter range is 1mm-5mm. The hole spacing also needs to be designed adaptively. Too dense a hole spacing may affect the structural strength of the main body section 41, while too sparse a hole spacing will result in poor noise reduction effect. Generally, the hole spacing range is 5mm-25mm.

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

[0053] The first sound-absorbing cotton 412 can be tightly attached to the outer wall of the main body section 41 by means of pasting, bundling or fixing with slots.

[0054] In practical applications, when fumes flow within the main body section 41 of the flue pipe adapter 4, some of the noise generated by the airflow propagates through the wall of the main body section 41. The first noise reduction hole 411 initially reflects, scatters, and diffracts the noise, changing the direction of sound wave propagation and energy distribution. Subsequently, the sound waves passing through the first noise reduction hole 411 enter the interior of the first sound-absorbing cotton 412 and are absorbed by the first sound-absorbing cotton 412, thereby effectively reducing the noise radiated outward from the flue pipe adapter 4.

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

[0056] The combined noise reduction effect of the fan housing structure 1 and the first noise reduction structure can further improve the overall noise reduction performance of the range hood.

[0057] In one embodiment, the flue adapter 4 further includes an extension section 42 that extends into the front panel assembly 2, and 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 cotton 422 and a second noise-reducing hole 421. The second noise-reducing hole 421 is disposed through the wall of the extension section 42, and the second sound-absorbing cotton 422 is wrapped around the outer wall of the extension section 42. The space between the wall with the second noise-reducing hole 421 and the display module 21 of the front panel assembly 2 constitutes the sound-absorbing cavity 22 of the noise-reducing hole 421. It should be noted that the design of the second sound-absorbing cotton 422 and the second noise-reducing hole 421 is the same as that of the first sound-absorbing cotton 412 and the first noise-reducing hole 411, and will not be described in detail here.

[0059] The combined noise reduction effect of the fan cabinet structure 1, the first noise reduction structure and the second noise reduction structure can further improve the overall noise reduction performance of the range hood.

[0060] like Figure 9 As shown, in one embodiment, another form of the 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 disposed on the outer wall of the extension section 42, the noise reduction membrane 424 is disposed on the support frame 423, and the mass block 425 is disposed on the noise reduction membrane 424.

[0061] The support frame 423 is a support component with a certain rigidity, which is fixed to the outer wall of the extension section 42 by means of welding, bolting, or integral molding. The support frame 423 can adopt a ring frame structure, which is set around the outer wall of the extension section 42, and its material can be metal (such as aluminum alloy or stainless steel).

[0062] The noise reduction membrane 424 can be made of 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 manner. Specifically, it can be fixed to the support frame 423 by mechanical clamps and maintain a certain tension.

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

[0064] The noise reduction diaphragm 424 and the mass block 425 together will resonate at a specific frequency, thereby consuming the sound energy at that specific frequency. The overall resonant frequency can be adjusted by changing the mass block 425, thereby reducing noise at different frequencies.

[0065] like Figure 10 As shown, Figure 10This diagram illustrates the simulation of the outlet flow rate under the same conditions where the air handling unit adapter 13 is perpendicular to the outlet 112, and the grid direction is perpendicular to and parallel to the outlet 112. Figure 10 Image a illustrates a simulation where the direction of the grid (i.e., the length direction of the grid plate 122) is parallel to the air outlet direction of the air outlet 112. Figure 10 Image b illustrates the simulation scenario where the rectifier grid direction is perpendicular to the air outlet direction of outlet 112. The simulated flow field in the image shows that the flow field is more uniformly distributed when the rectifier grid direction is perpendicular to the air outlet direction of outlet 112 compared to when the rectifier grid direction is parallel to the air outlet direction of outlet 112. Simulation results show that at the same rotational speed of 1020 rpm, the outlet flow rate in the perpendicular case is 33.6 m³ / s. 3 / min, while the outlet flow rate in the parallel case is only 31.9m³ / min. 3 / min, the vertical air volume is greater at the same speed, in other words, the vertical speed is smaller and the noise is lower at the same air volume.

[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 these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fan cabinet structure, characterized in that, The system includes a cabinet with a through air inlet and an air outlet. The air inlet is located at the top of the cabinet, and the air outlet is located on the side of the cabinet. The air inlet has several air inlet holes that extend in the same direction and are perpendicular to the air outlet direction. The system also includes a grille at the air inlet, with air inlet holes formed on the grille. The grille includes a mounting frame and a plurality of parallel, spaced-apart grilles within the mounting frame. The length of each grille is perpendicular to the air outlet direction, and the space between two adjacent grilles forms the air inlet hole.

2. The air handling unit structure according to claim 1, characterized in that, The mounting frame is a ring-shaped structure, and the length of the grid plates arranged from the center of the mounting frame to the edge gradually decreases.

3. The air handling unit structure according to claim 1, characterized in that, It also includes a blower adapter, which is connected to the air inlet, and the air inlet direction of the blower adapter is parallel or perpendicular to the air outlet direction.

4. A range hood, characterized in that, The device includes a flue, a flue adapter, a front panel assembly, and the air handling unit structure as described in any one of claims 1-3, wherein the upper end of the flue is connected to the cabinet body, the lower end of the flue is connected to the flue adapter, and the flue adapter is connected to the front panel assembly.

5. The range hood according to claim 4, characterized in that, The flue 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 disposed through the wall of the main body section, and the first sound-absorbing cotton is wrapped around the outer wall of the main body section.

6. The range hood according to claim 4, characterized in that, The flue adapter also includes an extension section that extends into the front panel assembly, and the extension section is provided with a second noise reduction structure.

7. The range hood according to claim 6, 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 disposed through the wall of the extension section, and the second sound-absorbing cotton is wrapped around the outer wall of the extension section.

8. The range hood according to claim 6, characterized in that, The second noise reduction structure includes a support frame, a noise reduction membrane, and a mass block. The support frame is disposed on the outer wall of the extension section, the noise reduction membrane is disposed on the support frame, and the mass block is disposed on the noise reduction membrane.

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