Sound absorption module and range hood

Abstract

The sound absorption module comprises a frame body, a sound absorption piece and a partition piece, the frame body comprises a bottom plate and a frame, the frame is connected with the bottom plate and extends in the direction away from the bottom plate, a cavity is formed between the frame and the bottom plate, and an opening communicating with the cavity is formed in the end, away from the bottom plate, of the frame; the sound absorption piece covers the opening and is connected with the frame body to seal the cavity; the partition piece is located in the cavity, the two ends of the partition piece are connected with the bottom plate and the sound absorption piece respectively, the partition piece divides the cavity into a plurality of sound absorption cavities, and the partition piece is provided with a first communication channel communicating every two adjacent sound absorption cavities. According to the technical scheme, noise within a certain frequency range can be effectively reduced, the noise reduction requirement is met, and meanwhile machining and manufacturing are easy.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a sound absorption module and a range hood. Background Art

[0002] The aerodynamic noise generated by operating range hoods is a major source of noise in kitchens. Before the implementation of the new standard, "GB / T17713-2022, Range Hoods and Other Cooking Fume Extraction and Exhaust Devices," noise levels were measured based on the sound power level in a semi-anechoic chamber. After the new standard's implementation, operating noise became the primary metric. Operating noise describes the actual sound pressure level perceived by the human ear in a simulated kitchen laboratory, taking into account flue exhaust resistance, more closely resembling the actual user experience. Changes in test conditions lead to changes in the noise spectrum, affecting the effectiveness of noise reduction measures.

[0003] The existing technology mainly adopts passive noise reduction measures such as sound-absorbing cotton and micro-perforated plates, which will increase the air intake resistance of the range hood and affect its aerodynamic efficiency. Utility Model Content

[0004] The embodiments of the present application provide a sound absorption module and a range hood, which are used to improve the problem that the passive noise reduction technology in the related art cannot effectively reduce low-frequency noise and will increase the air intake resistance.

[0005] In a first aspect, an embodiment of the present application provides a sound absorbing module and a range hood, comprising: a frame, comprising a bottom plate and a frame, the frame being connected to the bottom plate and extending in a direction away from the bottom plate, a chamber being formed between the frame and the bottom plate, and an opening communicating with the chamber being formed at an end of the frame away from the bottom plate; a sound absorbing member, a cover being arranged at the opening, the sound absorbing member being connected to the frame to close the chamber; and a partition being located in the chamber, the two ends of the partition being respectively connected to the bottom plate and the sound absorbing member, the partition dividing the chamber into a plurality of sound absorbing chambers, the partition being provided with a first connecting channel connecting two adjacent sound absorbing chambers.

[0006] In some embodiments, at least two of the sound absorbing cavities have different volumes.

[0007] In some embodiments, the partition includes: at least one partition, the two ends of the partition are respectively connected to the bottom plate and the sound absorbing member, the partition divides the cavity into multiple sound absorbing cavities, and the partition is provided with a first connecting channel.

[0008] In some embodiments, the partition includes at least two partitions, and the at least two partitions include: a first partition; a second partition, and the first partition is opposite to the second partition and spaced apart.

[0009] In some embodiments, the partition includes at least two partitions, and the at least two partitions include: a first partition; a second partition, and the first partition is connected to the second partition and is arranged at an angle.

[0010] In some embodiments, the first partition plate and the second partition plate are connected to the inner wall surface of the frame participating in constructing the chamber, or the first partition plate and the second partition plate are connected inside the chamber.

[0011] In some embodiments, the partitions are perpendicular to the base.

[0012] In some embodiments, the first connecting channel includes a first connecting hole, the cross-section of the first connecting hole is circular, and the aperture of the first connecting hole is R1, wherein the sound absorption module is configured as follows: 0<R1≤0.1mm; and / or, the first connecting channel includes a second connecting hole, the cross-section of the second connecting hole is triangular, semicircular, rectangular or star-shaped; and / or, the first connecting channel includes a first connecting seam, and the first connecting seam extends in a direction intersecting with the bottom plate; and / or, the first connecting channel includes a second connecting seam, and the second connecting seam extends in a direction parallel to the bottom plate; and / or, the plate surface of the bottom plate is circular, triangular, rectangular or polygonal; and / or, the sound absorbing component includes sound absorbing cotton; and / or, the thickness of the sound absorbing component in a direction perpendicular to the bottom plate is L1, and the sound absorption module is configured as follows: 0<L1≤5mm.

[0013] In some embodiments, multiple chambers are formed between the frame and the base plate, and the frame forms an opening connected to each chamber at one end away from the base plate; a sound absorbing member is covered on all the openings to close all the chambers; and a partition is provided in each chamber.

[0014] In some embodiments, the frame is provided with a second communication channel connecting the two chambers.

[0015] In some embodiments, multiple chambers are divided into multiple chamber units, each chamber unit includes multiple chambers distributed along a first direction, multiple chamber units are distributed along a second direction, and the first direction intersects with the second direction; a second connecting channel is provided on the frame to connect two adjacent chambers in the chamber unit.

[0016] In some embodiments, the plurality of chamber units include: a first chamber unit; and a plurality of second chamber units, wherein the sound absorption cavity within the second chamber unit is different from the sound absorption cavity within the first chamber unit, and along the second direction, the first chamber unit is located between two adjacent groups of second chamber units.

[0017] In some embodiments, the second connecting channel includes multiple connecting holes or multiple connecting seams distributed along the second direction; or, the second connecting channel includes multiple connecting holes or multiple connecting seams distributed along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0018] In a second aspect, an embodiment of the present application provides a range hood, which includes the above-mentioned sound absorption module.

[0019] In some embodiments, the range hood further includes: a fan assembly; a casing, the fan assembly is located within the casing, the casing includes a panel opposite to the fan assembly, and the sound absorption module is located within the casing and mounted on the panel; wherein the sound absorption component of the sound absorption module is closer to the fan assembly than to the base plate.

[0020] The sound-absorbing module and range hood according to the embodiments of the present application include a frame, a sound-absorbing component, and a partition. The frame includes a bottom plate and a frame. Sound waves enter the cavity through the opening of the frame, where they are reflected and absorbed, thereby achieving a noise reduction effect. The sound-absorbing component covers the opening. On the one hand, the sound-absorbing component itself can absorb noise of a certain frequency. On the other hand, the sound-absorbing component can be connected to the frame to seal the cavity and prevent sound waves from escaping.

[0021] The partition is used to separate the chamber into multiple sound-absorbing cavities, which helps to increase the sound propagation path within the chamber, thereby improving the noise absorption efficiency. In addition, each sound-absorbing cavity can be regarded as an independent acoustic unit. The sound-absorbing cavities are interconnected through the first connecting channel on the partition. The first connecting channel is used to enhance the coupling between the sound-absorbing cavities, so that the noise can be transmitted between the sound-absorbing cavities, further increasing the number of noise reflections and absorptions. It can be understood that by adjusting the specific dimensions of each part of the sound-absorbing module, sound-absorbing cavities of various volumes can be formed, which can be optimized for specific noise frequency bands, thereby effectively absorbing low-frequency noise. In addition, the sound-absorbing member and the sound-absorbing cavity are combined to absorb sound waves together. Since the sound-absorbing cavity is hollow, it does not generate significant resistance to the gas flow in the range hood, and thus can effectively reduce the impact on the gas flow inside the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a sound absorption module in one embodiment of the present application;

[0024] Figure 2 for Figure 1 3D schematic diagram of the middle sound absorption module;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of a sound absorption module in another embodiment of the present application;

[0026] Figure 4This is a schematic diagram of the three-dimensional structure of the first baffle and the second baffle in the sound absorption module in another embodiment of the present application;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the first baffle and the second baffle in the sound absorption module in another embodiment of the present application;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the first baffle and the second baffle in the sound absorption module in another embodiment of the present application;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the first connecting channel of the sound absorption module in another embodiment of the present application;

[0030] Figure 8 This is a schematic diagram of the three-dimensional structure of the first connecting channel of the sound absorption module in another embodiment of the present application;

[0031] Figure 9 This is a schematic diagram of the three-dimensional structure of the first connecting channel of the sound absorption module in another embodiment of the present application;

[0032] Figure 10 This is a schematic diagram of the three-dimensional structure of the first connecting channel of the sound absorption module in another embodiment of the present application;

[0033] Figure 11 This is a schematic diagram of the three-dimensional structure of the first connecting channel of the sound absorption module in another embodiment of the present application;

[0034] Figure 12 This is a schematic diagram of the three-dimensional structure of the first connecting channel of the sound absorption module in another embodiment of the present application;

[0035] Figure 13 This is a schematic diagram of the three-dimensional structure of the first connecting channel of the sound absorption module in another embodiment of the present application;

[0036] Figure 14 This is a schematic diagram of the three-dimensional structure of the first connecting channel of the sound absorption module in another embodiment of the present application;

[0037] Figure 15 This is a schematic diagram of the three-dimensional structure of the bottom plate of the sound absorption module in one embodiment of the present application;

[0038] Figure 16 This is a schematic diagram of the three-dimensional structure of the bottom plate of the sound absorbing module in another embodiment of the present application;

[0039] Figure 17 This is a schematic diagram of the three-dimensional structure of the bottom plate of the sound absorbing module in another embodiment of the present application;

[0040] Figure 18 This is a schematic diagram of the three-dimensional structure of the bottom plate of the sound absorbing module in another embodiment of the present application;

[0041] Figure 19 This is a schematic diagram of a three-dimensional structure of a partial structure of a sound absorption module in one embodiment of the present application;

[0042] Figure 20 This is a schematic diagram of a three-dimensional structure of a partial structure of a sound absorption module in another embodiment of the present application;

[0043] Figure 21 This is a schematic diagram of the three-dimensional structure of a range hood in one embodiment of the present application.

[0044] Reference numerals:

[0045] 1. Range hood;

[0046] 100. Sound absorption module;

[0047] 110, frame; 111, bottom plate; 112, frame; 1121, second communication channel; 113, chamber; 113a, sound absorbing chamber; 114, opening;

[0048] 120. Sound-absorbing parts;

[0049] 130, separator; 131, first connecting channel; 1311, first connecting hole; 1312, second connecting hole; 1313, first connecting seam; 1314, second connecting seam; 132, partition; 1321, first partition; 1322, second partition;

[0050] 140, chamber unit; 141, first chamber unit; 142, second chamber unit;

[0051] 200, fan assembly;

[0052] 300, housing; 310, panel;

[0053] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0055] The aerodynamic noise generated by operating range hoods is a major source of noise in kitchens. Before the implementation of the new standard, "GB / T17713-2022, Range Hoods and Other Cooking Fume Extraction and Exhaust Devices," noise levels were measured based on the sound power level in a semi-anechoic chamber. After the new standard's implementation, operating noise became the primary metric. Operating noise describes the actual sound pressure level perceived by the human ear in a simulated kitchen laboratory, taking into account flue exhaust resistance, more closely resembling the actual user experience. Changes in test conditions lead to changes in the noise spectrum, affecting the effectiveness of noise reduction measures.

[0056] The existing technology mainly adopts passive noise reduction measures such as sound-absorbing cotton and micro-perforated plates, which will increase the air intake resistance of the range hood and affect its aerodynamic efficiency.

[0057] Please refer to Figures 1 to 3 To solve the above technical problems, the embodiment of the present application provides a sound absorbing module 100 and a range hood 1, comprising: a frame 110, comprising a bottom plate 111 and a frame 112, the frame 112 being connected to the bottom plate 111 and extending in a direction away from the bottom plate 111, a chamber 113 being formed between the frame 112 and the bottom plate 111, and an opening 114 being formed at one end of the frame 112 away from the bottom plate 111, communicating with the chamber 113; a sound absorbing member 120, covering the opening 114 and connected to the frame 110 to seal the chamber 113; and a partition 130, located in the chamber 113, the two ends of the partition 130 being connected to the bottom plate 111 and the sound absorbing member 120 respectively, the partition 130 dividing the chamber 113 into a plurality of sound absorbing chambers 113a, the partition 130 being provided with a first connecting channel 131 connecting two adjacent sound absorbing chambers 113a.

[0058] The sound-absorbing module 100 and range hood 1 according to the embodiment of the present application include a frame 110, a sound-absorbing member 120, and a partition 130. The frame 110 includes a bottom plate 111 and a frame 112. Sound waves enter a chamber 113 through an opening 114 in the frame 112, where they are reflected and absorbed, thereby achieving a noise reduction effect. The sound-absorbing member 120 covers the opening 114. While capable of absorbing noise of a certain frequency, the sound-absorbing member 120 is connected to the frame 110 to seal the chamber and prevent sound waves from escaping.

[0059] The partition 130 is used to separate the chamber 113 into multiple sound absorption chambers 113a, which helps increase the sound propagation path within the chamber 113, thereby improving noise absorption efficiency. Furthermore, each sound absorption chamber 113a can be considered an independent acoustic unit. Each sound absorption chamber 113a is interconnected via a first connecting channel 131 on the partition 130. The first connecting channel 131 is used to enhance coupling between the individual sound absorption chambers 113a, allowing noise to propagate between them, further increasing the number of noise reflections and absorptions. It is understood that by adjusting the specific dimensions of the various components of the sound absorption module 100, sound absorption chambers 113a of various volumes can be formed, allowing optimization for specific noise frequency bands to effectively absorb low-frequency noise. In addition, the sound absorbing member 120 and the sound absorbing cavity 113a are combined to absorb sound waves. Since the sound absorbing cavity 113a is hollow, it does not produce a large resistance to the gas flow in the range hood 1, and thus can effectively reduce the impact on the gas flow inside the range hood 1.

[0060] It will be appreciated that in the embodiment of the present application, each sound absorbing cavity 113a extends in a direction from the sound absorbing member 120 toward the bottom plate 111. The multiple sound absorbing cavities 113a are distributed in a direction perpendicular to the direction from the sound absorbing member 120 toward the bottom plate 111, and the sound absorbing cavities 113a are spaced apart. This arrangement reduces the thickness of the sound absorbing module 100 in the direction from the sound absorbing member 120 toward the bottom plate 111, thereby effectively reducing the flow resistance of the sound absorbing module 100 to the airflow within the range hood 1. The specific distribution of the sound absorbing cavities 113a is not limited, as long as it meets the above conditions and achieves the corresponding function.

[0061] Please refer to Figure 3 It can be understood that, in some embodiments, the various sound absorbing cavities 113a are nested in a distribution. Such a configuration can also reduce the thickness of the sound absorbing module 100 in the direction in which the sound absorbing member 120 points to the bottom plate 111, thereby effectively reducing the flow resistance of the sound absorbing module 100 to the airflow in the range hood 1.

[0062] Furthermore, to ensure that the sound absorption module 100 has the ability to absorb noise across multiple frequency bands, in the embodiments of the present application, at least two sound absorption cavities 113a have different volumes. Specifically, when sound waves enter a closed or semi-enclosed space, they cause the air within the space to vibrate and form standing waves, thereby converting sound energy into other forms of energy, achieving the effect of noise absorption. The formation of standing waves is related to the size of the space and the wavelength of the sound waves. Therefore, when the wavelength of the sound wave matches the size of the space, the sound wave can resonate with the air column within the space. At the resonant frequency, the sound wave's amplitude is maximized, allowing it to be more efficiently converted into other forms of energy.

[0063] In the embodiments of the present application, since smaller sound absorption cavities 113a accommodate shorter wavelengths, smaller sound absorption cavities 113a tend to resonate at higher frequencies, thereby absorbing higher-frequency noise. Conversely, larger sound absorption cavities 113a can accommodate longer wavelengths and are therefore suitable for lower-frequency sound waves. By designing multiple sound absorption cavities 113a of different sizes, the sound absorption module 100 can be used to absorb noise of various frequencies, particularly mid- and low-frequency noise.

[0064] Please refer to Figure 2 The partition 130 includes at least one partition 132, with its ends connected to the bottom plate 111 and the sound absorbing member 120, respectively. The partition 132 divides the chamber 113 into multiple sound absorbing cavities 113a. The partition 132 is provided with a first connecting channel 131. It will be appreciated that the partition 132 can separate the chamber 113 to form multiple relatively independent sound absorbing cavities 113a, and the provision of the first connecting channel on the partition 132 can also enable coupling between adjacent sound absorbing cavities 113a, allowing sound waves to flow between adjacent sound absorbing cavities 113a, thereby increasing the propagation path length of sound waves within the chamber 113 and facilitating the absorption of low-frequency noise. Furthermore, the presence of multiple partitions 132 facilitates the separation of multiple sound absorbing cavities 113a. The specific number can be determined based on the frequency range of the noise and is not limited herein.

[0065] Please refer to Figure 4 The partition 130 includes at least two partitions 132, including a first partition 1321 and a second partition 1322. The first partition 1321 and the second partition 1322 are arranged opposite and spaced apart from each other. Thus, the first partition 1321 and the second partition 1322 are used to separate and form three sound absorption chambers 113a. Specifically, the first partition 1321 and the second partition 1322 are arranged opposite and spaced apart from each other, including being arranged parallel to each other, with the sides of the first partition 1321 and the second partition 1322 respectively connected to the frame 112. When the first partition 1321 and the second partition 1322 are arranged parallel to each other, the complexity of the entire sound absorption module 100 is reduced, facilitating manufacturing, subsequent adjustment, and maintenance. Furthermore, the parallel arrangement of the partitions 132 reduces the complexity of the sound wave propagation path, simplifies the sound wave propagation model, and facilitates the prediction and control of the acoustic performance of the sound absorption module 100. It is understandable that by adjusting the distance between the first partition 1321 and the second partition 1322 , the frequency response characteristics of the sound absorbing module 100 can be flexibly controlled, and the best noise control effect can be achieved in combination with actual needs.

[0066] Please refer to Figure 5 and Figure 6 The partition 130 includes at least two partitions 132, including a first partition 1321 and a second partition 1322. The first partition 1321 and the second partition 1322 are connected and arranged at an angle. This arrangement allows the first partition 1321 and the second partition 1322 to form three sound absorption cavities 113a. Specifically, in some embodiments, the first partition 1321 and the second partition 1322 are connected at an angle, which complicates the propagation path of sound waves within the sound absorption cavities 113a, allowing the sound waves to reflect multiple times within the sound absorption cavities 113a, increasing the chances of sound waves contacting the sound absorbing element 120 and thereby improving the sound absorption effect. It is understood that by adjusting the angle between the first partition 1321 and the second partition 1322, sound absorption cavities 113a of varying shapes and sizes can be formed. The angle between the first partition 1321 and the second partition 1322 can be adjusted according to actual conditions to achieve optimal noise control.

[0067] Furthermore, when the first partition 1321 and the second partition 1322 are connected at a certain angle, there are at least two situations. In one situation, see Figure 5 The first partition 1321 and the second partition 1322 are connected on the inner wall surface of the frame 112 to participate in the construction of the chamber 113. In another case, see Figure 4 The first partition plate 1321 and the second partition plate 1322 are connected inside the chamber 113 .

[0068] Specifically, in the first case, see Figure 6 The first partition plate 1321 and the second partition plate 1322 are respectively connected to the frame 112, which can make the connection between the first partition plate 1321 and the second partition plate 1322 more stable and improve the structural stability of the entire sound absorbing module 100.

[0069] For the second case, see Figure 5 The first baffle 1321 is connected to the frame 112 at both ends, while the second baffle 1322 is connected to the first baffle 1321 at one end at an angle, and to the frame 112 at the other end. This arrangement allows for greater flexibility in the design of the first and second baffles 1321, 1322, allowing for flexible adjustment of their connection, making it suitable for applications requiring highly customized sound absorption. It is understood that both of these arrangements can be adjusted to suit specific needs, thereby achieving a wider frequency response range and effectively improving sound absorption.

[0070] It will be appreciated that in some embodiments of the present application, the baffles 132 are perpendicular to the bottom plate 111. On the one hand, the baffles 132 are perpendicular to the bottom plate 111, making it less likely for the baffles 132 to tip over or shift under stress, thereby effectively improving the structural stability of the sound absorption module 100. On the other hand, the arrangement of the baffles 132 perpendicular to the bottom plate 111 simplifies the design of the sound absorption module 100, eliminating the need to consider the complexity associated with the tilt angle. This ensures ease of manufacturing, reduces manufacturing costs, and facilitates subsequent maintenance.

[0071] Please refer to Figure 7 The first connecting channel 131 includes a first connecting hole 1311. The first connecting hole 1311 has a circular cross-section and an aperture R1. The sound absorption module 100 is configured such that 0 < R1 ≤ 1 mm. Specifically, the first connecting hole 1311 serves as a channel for sound waves to propagate between adjacent sound absorption cavities 113a. Its aperture size directly affects the sound wave propagation effect. In some embodiments of the present application, the first connecting hole 1311 has a circular cross-section and an aperture range greater than 0 and less than or equal to 1 mm. It is understood that a smaller aperture can increase the propagation resistance of the sound wave, allowing the sound wave to be absorbed through multiple reflections within the sound absorption cavity 113a, thereby improving the sound absorption effect. Furthermore, a larger aperture facilitates processing and reduces manufacturing costs. In some embodiments, a 1 mm aperture of the first connecting hole 1311 can balance manufacturing costs while ensuring noise absorption.

[0072] In addition, please continue to refer to Figures 8 to 10 The first connecting channel 131 includes a second connecting hole 1312. The cross-section of the second connecting hole 1312 is triangular, semicircular, rectangular, or star-shaped. It is understood that the second connecting hole 1312 can have a variety of shapes and can be used to connect two adjacent sound absorption cavities 113a, thereby effectively absorbing low-frequency noise. The cross-section of the second connecting hole 1312 can be triangular, semicircular, rectangular, or star-shaped, as long as the second connecting hole 1312 can connect two adjacent sound absorption cavities 113a. The specific shape is not limited in this application.

[0073] exist Figure 9 In the embodiment, the position of the second connection hole 1312 can also be set close to the opening 114. It can be understood that the position of the second connection hole 1312 is not limited in the present application. The second connection hole 1312 can be connected to the opening 114, and can also be distributed at various positions of the partition 132, as long as it can achieve the effect of connecting various sound absorption cavities 113a.

[0074] It can be understood that the first connection channel may include multiple first connection holes 1311 or second connection holes 1312, or may include a combination of multiple first connection holes 1311 and second connection holes 1312. The number and different selection methods of the first connection holes 1311 and the second connection holes 1312 in the above-mentioned first connection channel are not limited here and can be set according to the actual sound absorption effect required.

[0075] In some embodiments, reference may be made to Figures 12 to 13 The first connecting channel 131 includes a first connecting seam 1313, which extends in a direction intersecting the bottom plate 111. It is understood that the first connecting seam 1313 can extend in a specific direction and connect two adjacent sound absorption cavities 113a, thereby effectively absorbing low-frequency noise. Furthermore, due to the long length of the first connecting seam 1313, its manufacture is relatively simple and can be achieved through cutting or other methods, reducing manufacturing difficulty and cost. Specifically, the first connecting seam 1313 can extend perpendicular to the bottom plate 111, or it can extend at an angle to the bottom plate 111. This is not a limitation of the present application, as long as the above conditions are met. By adjusting the angle between the first connecting seam 1313 and the bottom plate 111, the propagation path of sound waves can be more flexibly controlled, thereby optimizing the overall acoustic performance of the sound absorption module 100.

[0076] In addition, please refer to Figure 14 First connecting channel 131 includes a second connecting seam 1314 extending parallel to bottom plate 111. Second connecting seam 1314, arranged parallel to bottom plate 111, simplifies the design of sound absorbing module 100 by eliminating the need to consider angle complexity and simplifying the manufacturing process. Second connecting seam 1314 is also suitable for controlling noise within a specific frequency range.

[0077] exist Figures 15 to 18In the embodiment of the present application, when the surface of the bottom plate 111 is circular, the circular bottom plate 111 can be used to provide symmetrical acoustic performance and contribute to the uniform distribution of sound waves; when the surface of the bottom plate 111 is triangular, a unique sound absorption cavity 113a layout can be formed to meet specific noise absorption occasions; when the surface of the bottom plate 111 is rectangular, it can be applied to most scenarios and is convenient for standardized production and installation. On the other hand, it can also be conveniently used with other components and has the advantage of wide application; and when the surface of the bottom plate 111 is polygonal, such as hexagonal, octagonal, etc., this design can provide flexible acoustic performance and can be selected according to actual needs. Regarding the shape of the bottom plate 111, this application does not impose any restrictions, as long as it can meet the actual application needs.

[0078] It is understood that in the embodiment of the present application, the sound-absorbing member 120 includes sound-absorbing cotton with an adhesive backing on one side for attachment to the frame 112 to seal the chamber 113. The sound-absorbing cotton can initially absorb some sound waves. It is understood that the sound-absorbing cotton has a multi-void structure with multiple micropores. Due to the small aperture of the micropores, it can effectively absorb high-frequency noise. Therefore, the sound-absorbing cotton and the sound-absorbing chamber 113a can simultaneously absorb high- and low-frequency noise, achieving a wider frequency response efficiency.

[0079] In other embodiments, the sound absorbing member 120 may be other porous structures, such as fiber materials, glass fiber, and rock wool, or foam materials, such as polyurethane foam and open-cell foam, as well as porous composite materials, etc. As long as the sound absorption effect can be achieved, the present application is not limited thereto.

[0080] In addition, please refer to Figure 1 Because the sound-absorbing cavity 113a can effectively absorb low-frequency noise, it can share some of the noise absorption function, thereby preventing the sound-absorbing member 120 from being too long in the direction of sound propagation, which would affect the aerodynamic efficiency of the range hood 1. Specifically, the thickness of the sound-absorbing member 120 in a direction perpendicular to the bottom plate 111 is L1, and the sound-absorbing module 100 is configured such that: 0 < L1 ≤ 5mm. When the size of the sound-absorbing member 120 is greater than 0 and less than or equal to 5mm, it helps to minimize the impact on aerodynamic efficiency while maintaining good sound absorption. It is understood that the size of the sound-absorbing member 120 is also related to its density and elasticity. According to the different densities and elasticities of the sound-absorbing member 120, the corresponding size of the sound-absorbing member 120 needs to be selected.

[0081] Please refer to Figure 1Multiple chambers 113 are formed between the frame 112 and the bottom plate 111. The frame 112 has an opening 114 at one end facing away from the bottom plate 111, communicating with each chamber 113. Sound-absorbing members 120 cover all openings 114 to seal all chambers 113. A partition 130 is provided within each chamber 113. It will be appreciated that in the embodiment of the present application, the sound-absorbing module 100 is formed with multiple chambers 113, each of which is further subdivided into multiple sound-absorbing cavities 113a. At least some of the sound-absorbing cavities 113a have different volumes, which can expand the frequency range of sound absorption. The different sizes of the sound-absorbing cavities 113a are suitable for sound waves of different frequencies. Therefore, the entire sound-absorbing module 100 can more effectively handle broadband noise. In addition, since the partition 130 is provided with a first connecting channel 131, it facilitates communication between adjacent sound absorption cavities 113a in a single chamber 113, thereby extending the propagation path of some sound waves, increasing the number of reflections of the sound waves and the contact frequency with the sound absorbing member 120, and further enhancing the sound absorption effect.

[0082] Further, you can refer to Figure 20 To enhance the absorption of low-frequency noise, the frame 112 is provided with a second connecting channel 1121 that connects the two chambers 113. As can be appreciated, this arrangement, through the combination of multiple chambers 113 and the complex propagation paths of sound waves between them, enhances the absorption of low-frequency noise, thereby achieving noise control across a wider frequency range. This modular design allows the sound absorption device to be customized to suit specific needs and diverse application scenarios, providing high flexibility.

[0083] Reference Figure 19 and Figure 20 In some embodiments, the multiple chambers 113 are divided into multiple chamber units 140. Each chamber unit 140 includes multiple chambers 113 distributed along a first direction X. The multiple chamber units 140 are distributed along a second direction Y, with the first direction X and the second direction Y intersecting. The frame 112 is provided with a second connecting channel 1121 that connects two adjacent chambers 113 within a chamber unit 140. It will be understood that both the first direction X and the second direction Y are perpendicular to the direction from the sound absorbing member 120 toward the base plate 111. In the embodiments of the present application, the multiple chamber units 140 are arranged in an array along the first direction X and the second direction Y, and the chambers 113 are connected by the second connecting channel 1121, thereby achieving noise control over a wider frequency range.

[0084] Furthermore, the plurality of chamber units 140 include: a first chamber unit 141; and a plurality of second chamber units 142. The sound absorption cavities 113a of the chambers 113 within the second chamber units 142 are different from the sound absorption cavities 113a of the chambers 113 within the first chamber units 141. Along the second direction Y, the first chamber unit 141 is located between two adjacent groups of second chamber units 142. It will be appreciated that by arranging the sound absorption cavities 113a of different sizes and shapes (i.e., the first chamber units 141 and the second chamber units 142) in a specific manner, the frequency response range of the sound absorption module 100 can be expanded. The sound absorption cavities 113a of different sizes correspond to sound waves of different frequencies. Therefore, this arrangement helps to more effectively control broadband noise, increase the propagation path of sound waves, and improve the sound absorption effect of the sound absorption module 100 in the low-frequency range.

[0085] Specifically, the second connecting channel 1121 includes multiple connecting holes or multiple connecting seams distributed along the second direction Y; alternatively, the second connecting channel 1121 includes multiple connecting holes or multiple connecting seams distributed along the third direction Z, with the first direction X, the second direction Y, and the third direction Z being perpendicular to each other. The distribution of the connecting holes or connecting seams along different directions helps optimize the overall sound absorption performance of the sound absorption module 100. By adjusting the number and distribution of the connecting holes or connecting seams, the propagation path of sound waves within the chamber 113 can be more effectively controlled, thereby optimizing the sound absorption effect. The performance of the sound absorption module 100 can be adjusted according to specific application requirements, providing greater flexibility. This flexibility helps achieve a wider frequency response range and improves the sound absorption effect of the sound absorption module 100 at different frequencies. The third direction Z can be the direction from the sound absorbing member 120 toward the bottom plate 111, that is, the direction in which each sound absorption cavity 113a extends.

[0086] Second, please refer to Figure 21 The embodiment of the present application provides a range hood 1, which includes the above-mentioned sound absorption module 100. The specific structure of the sound absorption module 100 refers to the above-mentioned embodiment. Since the range hood 1 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0087] Furthermore, the range hood 1 includes a fan assembly 200, a housing 300, and a sound absorption module 100. The fan assembly 200 is located within the housing 300, which includes a panel 310 opposite the fan assembly 200. The sound absorption module 100 is located within the housing 300 and mounted on the panel 310. The sound absorbing member 120 of the sound absorption module 100 is closer to the fan assembly 200 than to the bottom plate 111. By mounting the sound absorption module 100 on the panel 310, the sound absorption module 100 is closer to the fan assembly 200, thereby effectively absorbing noise generated by the operation of the fan assembly 200. Furthermore, mounting the sound absorption module 100 on the panel 310 not only facilitates installation but also makes it easier for users to access and clean the sound absorption module 100 during subsequent maintenance.

[0088] 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, and do not indicate or imply 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 a limitation to the present invention.

[0089] 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 specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0090] In this utility model, 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 this utility model based on specific circumstances.

[0091] 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 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.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0093] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A sound absorbing module (100), characterized in that: include: A frame (110) comprises a bottom plate (111) and a frame (112), wherein the frame (112) is connected to the bottom plate (111) and extends in a direction away from the bottom plate (111), a chamber (113) is formed between the frame (112) and the bottom plate (111), and an opening (114) communicating with the chamber (113) is formed at an end of the frame (112) away from the bottom plate (111); a sound absorbing member (120) covering the opening (114), the sound absorbing member (120) being connected to the frame (110) to seal the chamber (113); and A partition (130) is located in the chamber (113), with two ends of the partition (130) respectively connected to the bottom plate (111) and the sound absorbing member (120), the partition (130) divides the chamber (113) into a plurality of sound absorbing cavities (113a), and the partition (130) is provided with a first connecting channel (131) for connecting two adjacent sound absorbing cavities (113a).

2. The sound absorbing module (100) according to claim 1, characterized in that The volumes of at least two of the sound absorbing cavities (113a) are different.

3. The sound absorbing module (100) according to claim 1, characterized in that The separator (130) comprises: At least one partition (132), two ends of the partition (132) are respectively connected to the bottom plate (111) and the sound absorbing member (120), the partition (132) divides the chamber (113) into a plurality of sound absorbing cavities (113a), and the partition (132) is provided with the first connecting channel (131).

4. The sound absorbing module (100) according to claim 3, characterized in that The separator (130) includes at least two partitions (132), and the at least two partitions (132) include: a first partition (1321); The second partition (1322), the first partition (1321) and the second partition (1322) are opposite to each other and spaced apart.

5. The sound absorbing module (100) according to claim 3, characterized in that The separator (130) includes at least two partitions (132), and the at least two partitions (132) include: a first partition (1321); The second partition (1322), the first partition (1321) and the second partition (1322) are connected and arranged at an angle.

6. The sound absorbing module (100) according to claim 5, characterized in that The first partition (1321) and the second partition (1322) are connected on the inner wall surface of the frame (112) to participate in the construction of the chamber (113), or the first partition (1321) and the second partition (1322) are connected inside the chamber (113).

7. The sound absorbing module (100) according to any one of claims 3 to 6, characterized in that: The partition (132) is perpendicular to the bottom plate (111).

8. The sound absorbing module (100) according to claim 1, characterized in that The first connecting channel (131) comprises a first connecting hole (1311), the cross section of the first connecting hole (1311) is circular, and the aperture of the first connecting hole (1311) is R1, wherein the sound absorption module (100) is configured as follows: 0<R1≤1mm; And / or, the first connecting channel (131) comprises a second connecting hole (1312), and the cross section of the second connecting hole (1312) is triangular, semicircular, rectangular or star-shaped; And / or, the first connecting channel (131) includes a first connecting seam (1313), and the first connecting seam (1313) extends along a direction intersecting with the bottom plate (111); And / or, the first connecting channel (131) includes a second connecting seam (1314), and the second connecting seam (1314) extends in a direction parallel to the bottom plate (111); And / or, the surface of the bottom plate (111) is circular, triangular, rectangular or polygonal; And / or, the sound absorbing member (120) includes sound absorbing cotton; And / or, the thickness of the sound absorbing member (120) in a direction perpendicular to the bottom plate (111) is L1, and the sound absorbing module (100) is configured as follows: 0<L1≤5mm.

9. The sound absorbing module (100) according to claim 1, characterized in that A plurality of chambers (113) are formed between the frame (112) and the bottom plate (111), and the frame (112) is formed at one end away from the bottom plate (111) with an opening (114) communicating with each chamber (113); The sound absorbing member (120) is covered on all the openings (114) to seal all the chambers (113); The partition (130) is provided in each chamber (113).

10. The sound absorbing module (100) according to claim 9, characterized in that The frame (112) is provided with a second communication channel (1121) for connecting the two chambers (113).

11. The sound absorbing module (100) according to claim 9, characterized in that The plurality of chambers (113) are divided into a plurality of chamber units (140), each of the chamber units (140) includes a plurality of chambers (113) distributed along a first direction (X), and the plurality of chamber units (140) are distributed along a second direction (Y), wherein the first direction (X) intersects with the second direction (Y); The frame (112) is provided with a second communication channel (1121) for connecting two adjacent chambers (113) in the chamber unit (140).

12. The sound absorbing module (100) according to claim 11, characterized in that The plurality of chamber units (140) include: a first chamber unit (141); A plurality of second chamber units (142), wherein the sound absorption cavity (113a) of the chamber (113) in the second chamber unit (142) is different from the sound absorption cavity (113a) of the chamber (113) in the first chamber unit (141), and along the second direction (Y), the first chamber unit (141) is located between two adjacent groups of the second chamber units (142).

13. The sound absorbing module (100) according to claim 11 or 12, characterized in that: The second connecting channel (1121) comprises a plurality of connecting holes or a plurality of connecting seams distributed along the second direction (Y); Alternatively, the second connecting channel (1121) includes a plurality of connecting holes or a plurality of connecting seams distributed along a third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

14. A range hood (1), characterized in that: The invention comprises the sound absorbing module (100) according to any one of claims 1 to 13.

15. The range hood (1) according to claim 14, characterized in that: Also includes: a fan assembly (200); A housing (300), the fan assembly (200) is located in the housing (300), the housing (300) includes a panel (310) opposite to the fan assembly (200), and the sound absorption module (100) is located in the housing (300) and mounted on the panel (310); Wherein, the sound absorbing member (120) of the sound absorbing module (100) is closer to the fan assembly (200) than to the bottom plate (111).

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