Noise reduction assembly and range hood
Patent Information
- Application Number
- CN202522302018.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-10-30
AI Technical Summary
[0003]本实用新型的目的在于提供一种降噪组件和油烟机，以缓解现有技术中存在的在油烟机的噪声声源所在容器的内壁大面积布置降噪材料以进行降噪，不仅降噪效果不佳且降噪材料用量大的技术问题
[0014]本实用新型提供的降噪组件包括声波聚焦结构和吸声结构；声波聚焦结构设置在噪声声源的传播路径上，声波聚焦结构的面对噪声声源的一侧设有朝向远离噪声声源的方向凹陷的反射弧面，反射弧面用于将来自噪声声源的声波反射至声波聚焦结构一侧的聚能点；吸声结构设置在聚能点处，吸声结构用于对反射至聚能点处的声波进行吸收降噪。本实用新型提供的降噪组件应用于油烟机等工作时会产生较大噪声的厨用设备，在使用过程中，需先确定厨用设备的噪声声源，以油烟机为例，油烟机的噪声主要由风机运行产生，因此油烟机的噪声声源即为风机，此时可以将降噪组件安装于风机的一侧，并使得声波聚焦结构的反射弧面朝向噪声声源。为提升降噪精确性，还可以进一步使得降噪组件位于风机叶轮旋转中心轴上。当风机运行时，其产生的噪声声波会先传递至声波聚焦结构的反射弧面处，由于声波在传递过程中遇到不同的介质会发生明显的折射和反射现象，因而噪声声波可以被反射弧面反射，此时通过调整反射弧面的位置和曲率，可以对声波的反射方向和角度进行控制，从而使得噪声声波被反射至同一点位（也即聚能点）。当声波被聚集至聚能点后，声波继续传播，又由于吸声结构位于聚能点处且吸声结构可以对声波进行吸收，因而经过聚集的声波会被吸声结构集中吸收消耗，从而对噪声进行针对性降噪，有效保证了该降噪组件的降噪效果。同时，由于本实用新型提供的降噪组件通过声波聚焦结构和吸声结构相互配合即可有效保证降噪效果，因而该降噪组件无需在风机等噪声声源所在容器（如机箱）的内壁上大面积铺设吸声海绵等降噪材料，有效减少了降噪材料的用量，不仅降低材料成本，且有效提升了降噪组件的安装效率。
Smart Images
Figure CN224922427U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of kitchen equipment technology, and in particular to a noise reduction component and a range hood. Background Technology
[0002] Kitchen appliances such as range hoods generate significant noise during operation. Traditional noise reduction methods typically involve placing sound-absorbing sponges or other noise-reducing materials over a large area on the inner wall of the container containing the noise source (such as the fan housing). However, this method is not only poorly targeted and ineffective, but also requires a large amount of noise-reducing material. Utility Model Content
[0003] The purpose of this utility model is to provide a noise reduction component and a range hood to alleviate the technical problems existing in the prior art, which involve arranging a large area of noise reduction material on the inner wall of the container where the noise source of the range hood is located, resulting in poor noise reduction effect and a large amount of noise reduction material used.
[0004] In a first aspect, the present invention provides a noise reduction component, including a sound wave focusing structure and a sound absorption structure; The sound wave focusing structure is set on the propagation path of the noise source. The side of the sound wave focusing structure facing the noise source has a reflective arc surface that is concave in the direction away from the noise source. The reflective arc surface is used to reflect the sound waves from the noise source to the focusing point on one side of the sound wave focusing structure. The sound-absorbing structure is placed at the energy-concentrating point, and is used to absorb and reduce noise from the sound waves reflected to the energy-concentrating point.
[0005] In an optional implementation, there are multiple reflective surfaces, and the curvatures of the multiple reflective surfaces are all different.
[0006] In an alternative implementation, the reflective arc surface extends circumferentially along the acoustic focusing structure to form a ring-shaped distribution.
[0007] In an optional implementation, there are multiple reflective surfaces, and the multiple reflective surfaces are arranged coaxially.
[0008] In an optional embodiment, a mounting cover is also included, the mounting cover having an open side, the open side of the mounting cover being fixed to the side of the sound wave focusing structure facing away from the noise source, and the sound-absorbing structure being installed inside the mounting cover.
[0009] In an optional embodiment, the mounting cover includes a support ring and a protective net, one side of the support ring forming the opening side of the mounting cover, and the other side being fitted with the protective net, with a sound-absorbing structure mounted on the protective net.
[0010] In an optional implementation, the thickness of the protective net is 2-3 mm.
[0011] In an optional implementation, the sound-absorbing structure includes a silencer and / or a layer of sound-absorbing material.
[0012] In an optional embodiment, the sound-absorbing structure includes a silencer and a sound-absorbing material layer, wherein the silencer is a reactive silencer and the sound-absorbing material layer is installed inside the silencer.
[0013] Secondly, this utility model provides a range hood, including a noise reduction component according to any of the aforementioned embodiments.
[0014] The noise reduction component provided by this utility model includes a sound wave focusing structure and a sound absorption structure. The sound wave focusing structure is positioned along the propagation path of the noise source. The side of the sound wave focusing structure facing the noise source has a concave reflective arc surface that moves away from the noise source. This reflective arc surface reflects sound waves from the noise source to a focusing point on one side of the sound wave focusing structure. The sound absorption structure is positioned at the focusing point and absorbs and reduces noise from the sound waves reflected thereto. This noise reduction component is applicable to kitchen appliances such as range hoods that generate significant noise during operation. In use, the noise source of the kitchen appliance must first be identified. Taking a range hood as an example, the noise of a range hood is mainly generated by the operation of the fan; therefore, the noise source of the range hood is the fan. The noise reduction component can be installed on one side of the fan, with the reflective arc surface of the sound wave focusing structure facing the noise source. To improve noise reduction accuracy, the noise reduction component can be further positioned on the central axis of the fan impeller's rotation. When the wind turbine is running, the noise waves it generates first travel to the reflective arc surface of the sound wave focusing structure. Because sound waves undergo significant refraction and reflection when encountering different media during propagation, the noise waves can be reflected by the reflective arc surface. By adjusting the position and curvature of the reflective arc surface, the direction and angle of sound wave reflection can be controlled, thus ensuring that the noise waves are reflected to a single point (i.e., the focusing point). Once the sound waves are focused at the focusing point, they continue to propagate. Since the sound-absorbing structure is located at the focusing point and can absorb the sound waves, the focused sound waves are concentrated and absorbed by the sound-absorbing structure, thus achieving targeted noise reduction and effectively ensuring the noise reduction effect of the noise reduction component. Meanwhile, since the noise reduction component provided by this utility model can effectively ensure the noise reduction effect by combining the sound wave focusing structure and the sound absorption structure, the noise reduction component does not need to lay a large area of sound-absorbing sponge and other noise reduction materials on the inner wall of the container (such as the chassis) where the noise source such as the fan is located. This effectively reduces the amount of noise reduction materials used, which not only reduces material costs but also effectively improves the installation efficiency of the noise reduction component.
[0015] Compared with the prior art, the noise reduction component provided by this utility model can first reflect and concentrate the sound waves from the noise source to the energy point through the sound wave focusing structure, and then absorb and consume the concentrated sound waves through the sound absorption structure, thereby targeting the noise source for noise reduction, effectively ensuring the noise reduction effect, while eliminating the need to arrange a large amount of noise reduction materials, effectively reducing the amount of noise reduction materials used.
[0016] The range hood provided by this utility model includes the above-mentioned noise reduction components, and thus the range hood and the above-mentioned noise reduction components can achieve the same beneficial effect. Attached Figure Description
[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 A front perspective view of a range hood including a noise reduction component provided for an embodiment of this utility model; Figure 2 A schematic diagram of the acoustic focusing structure provided in this embodiment of the present invention; Figure 3 A front perspective view of the acoustic focusing structure provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the noise reduction component provided in an embodiment of the present utility model; Figure 5 A schematic diagram of the structure of the muffler provided in this embodiment of the utility model; Figure 6 This is a cross-sectional view of the sound-absorbing structure provided in an embodiment of the present invention.
[0019] Icons: 1-Sound wave focusing structure; 10-Reflective arc surface; 2-Sound absorption structure; 20-Silencer; 21-Sound absorption material layer; 3-Energy focusing point; 4-Chassis; 5-Fan; 6-Mounting cover; 60-Support ring; 61-Protective net. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0022] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0023] Example: like Figures 1-6 As shown, the noise reduction component provided in this embodiment includes a sound wave focusing structure 1 and a sound absorption structure 2. The sound wave focusing structure 1 is disposed on the propagation path of the noise source. The side of the sound wave focusing structure 1 facing the noise source is provided with a reflective arc surface 10 that is concave in the direction away from the noise source. The reflective arc surface 10 is used to reflect the sound waves from the noise source to the focusing point 3 on one side of the sound wave focusing structure 1. The sound absorption structure 2 is disposed at the focusing point 3 and is used to absorb and reduce noise from the sound waves reflected to the focusing point 3.
[0024] The noise reduction component provided in this embodiment is applied to kitchen appliances such as range hoods that generate significant noise during operation. Before use, it is necessary to identify the noise source of the kitchen appliance, such as... Figure 1 As shown, taking a range hood as an example, the noise of the range hood is mainly generated by the operation of the fan 5 inside the casing 4. Therefore, the noise source of the range hood is the fan 5. In this case, the noise reduction component can be installed on one side of the fan 5, with the reflective arc surface 10 of the sound wave focusing structure 1 facing the noise source. To improve the accuracy of noise reduction, such as... Figure 1 As shown, the noise reduction component can be further positioned on the extension line of the rotation center axis of the impeller of the wind turbine 5.
[0025] When the fan 5 is running, the noise sound waves it generates will first be transmitted to the reflection arc surface 10 of the sound wave focusing structure 1. Since the sound waves will undergo obvious refraction and reflection when they encounter different media during transmission, the noise sound waves can be reflected by the reflection arc surface 10. At this time, by adjusting the position and curvature of the reflection arc surface 10, the reflection direction and angle of the sound waves can be controlled, so that the noise sound waves are reflected to the same point (i.e., the energy focusing point 3). Figure 1The dashed line between the fan 5 and the sound wave focusing structure 1 represents the noise sound wave transmission path, while the dashed line between the sound wave focusing structure 1 and the energy focusing point 3 represents the sound wave reflection path. When the sound wave is focused to the energy focusing point 3, it continues to propagate. Since the sound absorbing structure 2 is located at the energy focusing point 3 and can absorb the sound wave, the focused sound wave is concentrated and absorbed by the sound absorbing structure 2, thus achieving targeted noise reduction and effectively ensuring the noise reduction effect of the noise reduction component.
[0026] Meanwhile, since the noise reduction component provided in this embodiment can effectively ensure the noise reduction effect by the cooperation of the sound wave focusing structure 1 and the sound absorption structure 2, the noise reduction component does not need to lay a large area of sound-absorbing sponge and other noise reduction materials on the inner wall of the container (such as the chassis 4) where the noise source such as the fan 5 is located. This effectively reduces the amount of noise reduction materials used, which not only reduces material costs but also effectively improves the installation efficiency of the noise reduction component.
[0027] Compared with the prior art, the noise reduction component provided in this embodiment can first reflect and focus the sound waves from the noise source to the energy focusing point 3 through the sound wave focusing structure 1, and then absorb and consume the focused sound waves through the sound absorption structure 2, thereby targeting the noise source for noise reduction, effectively ensuring the noise reduction effect, and at the same time, it does not require the arrangement of a large amount of noise reduction materials, effectively reducing the amount of noise reduction materials used.
[0028] It should be noted that the noise reduction component provided in this embodiment can effectively reflect sound waves arriving at different positions of the sound wave focusing structure 1 to the same energy-concentrating point 3 through the reflective arc surface 10. Compared with the inclined planar reflective structure, it does not need to be tilted at too many angles, nor does it need to use a large number of reflective planes to cooperate with each other to accurately and effectively concentrate the sound waves at the same point, thereby effectively reducing the overall thickness and volume of the sound wave focusing structure 1.
[0029] To further improve the noise reduction effect, multiple noise reduction components can be used in this embodiment. These multiple noise reduction components are distributed at intervals around the noise source. In this case, the multiple noise reduction components can cooperate with each other to increase the noise reduction range.
[0030] like Figure 2 and Figure 3 As shown, there are multiple reflective arc surfaces 10, and the curvatures of the multiple reflective arc surfaces 10 are all different.
[0031] When there are multiple reflective arc surfaces 10, the reflection range of the sound wave focusing structure 1 can be increased, thereby improving the noise reduction effect. Since the curvatures of the multiple reflective arc surfaces 10 are different, it is beneficial for the sound wave focusing structure 1 to reflect the sound waves arriving at different positions to the same energy focusing point 3, which is beneficial for the subsequent absorption and consumption of noise sound waves by the sound absorption structure 2.
[0032] like Figure 2As shown, the reflective arc surface 10 extends circumferentially along the acoustic focusing structure 1 in a ring-shaped distribution.
[0033] When the reflective arc surface 10 is distributed in a ring shape, the distribution range of the reflective arc surface 10 can be increased, thereby further increasing the reflection range of the sound wave by the sound wave focusing structure 1.
[0034] Furthermore, such as Figure 2 and Figure 3 As shown, there are multiple reflective arc surfaces 10, and the multiple reflective arc surfaces 10 are coaxially arranged.
[0035] When multiple reflective arc surfaces 10 are set coaxially, the reflection range of sound waves by the sound wave focusing structure 1 can be further increased, thereby improving the noise reduction effect.
[0036] like Figure 4 As shown, the noise reduction component provided in this embodiment also includes a mounting cover 6. The mounting cover 6 has an opening side, which is fixed to the side of the sound wave focusing structure 1 that is away from the noise source. The sound absorption structure 2 is installed inside the mounting cover 6.
[0037] The mounting cover 6 is used to support the sound-absorbing structure 2, so that the sound-absorbing structure 2 can be stably positioned at the energy-concentrating point 3.
[0038] Furthermore, the mounting cover 6 includes a support ring 60 and a protective net 61. One side of the support ring 60 forms the opening side of the mounting cover 6, and the other side is equipped with the protective net 61. The sound-absorbing structure 2 is installed on the protective net 61.
[0039] The support ring 60 is used to support the protective net 61, so that the sound-absorbing structure 2 on the protective net 61 is accurately located at the energy-concentrating point 3, and the protective net 61 is used to support the sound-absorbing structure 2.
[0040] In addition, by adjusting the mesh size and material of the protective net 61, the protective net 61 can also absorb sound waves. In this case, the protective net 61 can reduce the noise of sound waves reflected to the two sides of the sound-absorbing structure, thereby further improving the noise reduction effect.
[0041] The shape of the mesh on the protective net 61 is not limited, but in this embodiment, the mesh shape of the protective net 61 is preferably polygonal.
[0042] There is no limitation on the size of the protective net 61. In order to improve the strength of the protective net 61 and enhance its support stability for the sound-absorbing structure 2, the thickness of the protective net 61 is preferably 2-3 mm in this embodiment.
[0043] In this embodiment, the specific structure of the sound-absorbing structure 2 can be selected in various ways. For example, the sound-absorbing structure 2 can be a structure made of sound-absorbing material that absorbs sound waves, or a structure that can resonate with sound waves and thus consume sound waves.
[0044] Based on this, the sound-absorbing structure 2 in this embodiment includes a silencer 20 or a sound-absorbing material layer 21, or the sound-absorbing structure 2 includes a silencer 20 and a sound-absorbing material layer 21.
[0045] like Figure 5 and Figure 6 As shown, when the sound-absorbing structure 2 includes a muffler 20 and a sound-absorbing material layer 21, the muffler 20 can be a reactive muffler 20, and the sound-absorbing material layer 21 is installed inside the muffler 20.
[0046] Among them, the reactive silencer 20 reduces the sound energy radiated outward by the silencer 20 by the change in impedance caused by abrupt changes in the pipe cross section or the adjacent resonant cavity during the sound propagation process, thereby achieving the purpose of noise reduction.
[0047] The sound-absorbing material layer 21 can be made of sound-absorbing materials such as sound-absorbing sponge, slag wool, and inorganic fibers.
[0048] This embodiment also provides a range hood that includes the aforementioned noise reduction component. Since the range hood provided in this embodiment includes the aforementioned noise reduction component, it can solve the same technical problem and achieve the same technical effect as the aforementioned noise reduction component, and will not be described in detail here.
[0049] It should be noted that, as Figure 1 As shown, the range hood provided in this embodiment may further include a housing 4 and a fan 5 installed inside the housing 4. Since the fan 5 is a noise source, the noise reduction component is fixed to one side of the fan 5. Figure 1 The dashed line between the fan 5 and the sound wave focusing structure 1 is the noise propagation path at the fan 5, and the dashed line between the sound wave focusing structure 1 and the energy focusing point 3 is the noise sound wave reflection path.
[0050] To improve the noise reduction effect, there can be multiple noise reduction components, which are distributed at intervals around the fan 5.
[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A noise reduction component, characterized in that, It includes a sound wave focusing structure (1) and a sound absorption structure (2); The sound wave focusing structure (1) is set on the propagation path of the noise source. The side of the sound wave focusing structure (1) facing the noise source is provided with a reflective arc surface (10) that is concave in the direction away from the noise source. The reflective arc surface (10) is used to reflect the sound waves from the noise source to the focusing point (3) on one side of the sound wave focusing structure (1). The sound-absorbing structure (2) is disposed at the energy-concentrating point (3), and the sound-absorbing structure (2) is used to absorb and reduce noise of the sound waves reflected to the energy-concentrating point (3).
2. The noise reduction component according to claim 1, characterized in that, There are multiple reflective arc surfaces (10), and the curvatures of the multiple reflective arc surfaces (10) are all different.
3. The noise reduction component according to claim 1, characterized in that, The reflective arc surface (10) extends circumferentially along the acoustic focusing structure (1) in a ring-shaped distribution.
4. The noise reduction component according to claim 3, characterized in that, There are multiple reflective arc surfaces (10), and the multiple reflective arc surfaces (10) are coaxially arranged.
5. The noise reduction component according to any one of claims 1-4, characterized in that, It also includes a mounting cover (6), which has an opening side. The opening side of the mounting cover (6) is fixed to the side of the sound wave focusing structure (1) facing away from the noise source. The sound-absorbing structure (2) is installed inside the mounting cover (6).
6. The noise reduction component according to claim 5, characterized in that, The mounting cover (6) includes a support ring (60) and a protective net (61). One side of the support ring (60) forms the opening side of the mounting cover (6), and the other side is equipped with the protective net (61). The sound-absorbing structure (2) is installed on the protective net (61).
7. The noise reduction component according to claim 6, characterized in that, The thickness of the protective net (61) is 2-3 mm.
8. The noise reduction component according to any one of claims 1-4, characterized in that, The sound-absorbing structure (2) includes a silencer (20) and / or a layer of sound-absorbing material (21).
9. The noise reduction component according to claim 8, characterized in that, The sound-absorbing structure (2) includes a silencer (20) and a sound-absorbing material layer (21), and the silencer (20) is a resistive silencer (20), and the sound-absorbing material layer (21) is installed inside the silencer (20).
10. A range hood, characterized in that, Includes the noise reduction component as described in any one of claims 1-9.