Range hood noise reduction assembly and range hood

Abstract

The utility model provides a range hood noise reduction assembly and a range hood, the range hood noise reduction assembly comprises a plate body, the inner side of the plate body is provided with noise reduction cotton, and the inner side of the noise reduction cotton is provided with a porous structure; a first profiling is arranged at the position, corresponding to the noise reduction cotton, of the inner side of the plate body, a second profiling is arranged in the first profiling, the depth of the first profiling is different from that of the second profiling, and the depth is the distance between the surface of the first profiling and the surface of the inner side of the plate body and the distance between the surface of the second profiling and the surface of the inner side of the plate body. According to the range hood noise reduction assembly and the range hood, the sound absorption frequency band can be widened, and the noise reduction effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a range hood noise reduction component and a range hood. Background Art

[0002] Range hood noise reduction is a crucial performance parameter to optimize. Existing noise reduction structures are deployed in various locations within the range hood, such as around the enclosure, around the air outlet, and along the sides of the air inlet. These structures typically utilize a combination of perforated panels and porous sound-absorbing materials. However, these structures have a narrow sound absorption band and are ineffective.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide a range hood noise reduction component, which can widen the sound absorption frequency band and improve the noise reduction effect.

[0005] Another object of the present invention is to provide a range hood comprising the above-mentioned range hood noise reduction component, which can widen the sound absorption frequency band and enhance the noise reduction effect.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A range hood noise reduction component includes a plate body, wherein noise reduction cotton is provided on the inner side of the plate body, and a porous structure is provided on the inner side of the noise reduction cotton; a first pressure profile is provided on the inner side of the plate body corresponding to the position of the noise reduction cotton, and a second pressure profile is provided inside the first pressure profile, and the depths of the first pressure profile and the second pressure profile are different, and the depth is the distance between the surfaces of the first pressure profile and the second pressure profile and the inner surface of the plate body.

[0008] According to one embodiment of the present invention, the depth of the first pressing profile is smaller than the depth of the second pressing profile.

[0009] According to one embodiment of the present invention, the first pressure profile is rectangular, and the second pressure profile is radial.

[0010] According to one embodiment of the present invention, the porous structure includes an outer frame and a mesh plate arranged outside the outer frame, and the outer frame covers the periphery of the mesh plate and is fixed inside the plate body.

[0011] According to one embodiment of the present invention, the mesh plate is an aluminum mesh.

[0012] According to one embodiment of the present invention, the opening rate of the mesh plate is greater than 70%, the mesh rib width of the mesh plate is ≤0.2 mm, and the mesh rib thickness is ≤0.2 mm.

[0013] According to one embodiment of the present invention, the mesh of the mesh plate is diamond-shaped, and the aspect ratio of the mesh is 1:1.5 to 1:2.

[0014] According to one embodiment of the present invention, a V-shaped guide plate is provided in the middle of a side of the outer frame away from the plate body.

[0015] According to one embodiment of the present invention, the bottom of the outer frame is provided with an inclined surface extending obliquely toward the plate body, and the inclined surface is provided with an opening;

[0016] And / or, a vertical connecting plate is provided in the middle of a side of the outer frame away from the plate body.

[0017] The utility model also provides a range hood, comprising the above-mentioned range hood noise reduction component.

[0018] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0019] The range hood noise reduction assembly and range hood provided by the embodiment of the present invention form a resonant sound-absorbing structure through a porous structure + noise-reducing cotton + cavity, providing a good noise reduction effect. The plate body is provided with two pressure profiles of different depths: a first pressure profile and a second pressure profile, the depths of which are H1 and H2 respectively. When the incident sound wave enters the cavity corresponding to H1, a resonant frequency f1 is obtained. When the incident sound wave enters the cavity corresponding to H2, a resonant frequency f2 is obtained. At this time, f1 and f2 are different, thereby obtaining a lower resonant sound absorption frequency. In combination with the noise-reducing cotton, low, medium and high resonant frequencies are obtained, thereby widening the sound absorption frequency band. By setting pressure profiles of different noise reduction depths, the plate body can widen the sound absorption frequency band, enhance the noise reduction effect, and strengthen the strength of the plate body, further improving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present invention are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention.

[0021] Figure 1 A schematic structural diagram of a range hood noise reduction assembly provided by an embodiment of the present utility model;

[0022] Figure 2 A schematic structural diagram of a plate body of a range hood noise reduction assembly provided by an embodiment of the present utility model;

[0023] Figure 3 A schematic diagram of the installation of the plate and noise reduction cotton of the range hood noise reduction assembly provided by an embodiment of the utility model;

[0024] Figure 4A schematic diagram of the installation of the plate, noise reduction cotton, and outer frame of the range hood noise reduction assembly provided by an embodiment of the utility model;

[0025] Figure 5 A schematic structural diagram of a range hood noise reduction assembly provided by another embodiment of the present invention;

[0026] Figure 6 This is a structural schematic diagram of a range hood provided in an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 1. Plate body; 11. First profile; 12. Second profile; 2. Noise reduction cotton; 3. Porous structure; 31. Outer frame; 311. First frame; 312. Second frame; 32. Mesh plate; 33. Guide plate; 34. Inclined surface; 35. Connecting plate; 4. Fan; 5. Wind cabinet. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with examples. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompass such modifications and variations as come within the scope of the appended claims and their equivalents.

[0030] In the description of the present invention, the words "first", "second" and similar terms do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprises" and similar terms mean that the element or object preceding the word includes the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects. The terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and other directions or positions are based on the directions or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention. The terms "connected", "connected" and "disposed" used in the present invention should be understood in a broad sense. For example, they can mean fixed connection or detachable connection; direct connection or indirect connection through an intermediate component; wired electrical connection, radio connection, or wireless communication signal connection. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0031] like Figure 1 、 Figure 2 、 Figure 3 As shown, the embodiment of the present invention provides a range hood noise reduction component, including a plate body 1. For the convenience of description, the direction of the plate body 1 toward the inside of the range hood is defined as the inner side, and the direction toward the outside is defined as the outer side. Figure 1 The upper part is the upper part, and the lower part is the lower part. Noise reduction cotton 2 is provided on the inner side of the plate body 1, and a porous structure 3 is provided on the inner side of the noise reduction cotton 2. The porous structure 3 covers the noise reduction cotton 2 and the porous structure 3 is fixedly connected to the inner side of the plate body 1. A first pressure profile 11 is provided on the inner side of the plate body 1 at a position corresponding to the noise reduction cotton 2, and a second pressure profile 12 is provided inside the first pressure profile 11. The depths of the first pressure profile 11 and the second pressure profile 12 are different. In this embodiment, the first pressure profile 11 and the second pressure profile 12 are both concavely formed on the inner surface of the plate body 1, but the degree of concavity is different. Therefore, the depth is the distance between the first pressure profile 11 and the second pressure profile 12 and the inner surface of the plate body 1.

[0032] The range hood noise reduction component provided by the embodiment of the present invention forms a resonant sound-absorbing structure through a porous structure + noise-reducing cotton (such as melamine cotton) + a cavity (air layer), providing a good noise reduction effect. The plate body 1 is provided with two profiles of different depths: a first profile 11 and a second profile 12, the depths of which are H1 and H2 respectively. Specifically, along the thickness direction of the plate body 1, the distances between the surface of the first profile 11 and the surface of the second profile 12 and the inner surface of the plate body 1 are different. When the incident sound wave enters the cavity corresponding to H1, a resonant frequency f1 is obtained. When the incident sound wave enters the cavity corresponding to H2, a resonant frequency f2 is obtained. At this time, f1 and f2 are different, thereby obtaining a lower resonant sound absorption frequency. In combination with the noise-reducing cotton 2, low, medium and high resonant frequencies are obtained, thereby widening the frequency band. By setting profiles of different noise reduction depths, the plate body 1 can widen the sound absorption frequency band, enhance the noise reduction effect, and strengthen the strength of the plate body 1, further improving the noise reduction effect.

[0033] In one embodiment of the present invention, the depth of the first profile 11 is less than the depth of the second profile 12, i.e., H1 < H2. In this case, when an incident sound wave enters the cavity corresponding to H1, a resonant frequency f1 is obtained. When an incident sound wave enters the cavity corresponding to H2, a resonant frequency f2 is obtained. With f1 > f2, a lower resonant sound absorption frequency is achieved. Combined with the noise reduction cotton 2, low, medium, and high resonant frequencies are achieved, thereby widening the sound absorption frequency band. By providing profiles with different noise reduction depths, the plate body 1 can widen the sound absorption frequency band, enhancing the noise reduction effect while also strengthening the plate body, further improving the noise reduction effect.

[0034] like Figure 2 As shown, in one embodiment of the present invention, the first press profile 11 is rectangular, and the second press profile 12 is radial.

[0035] like Figure 1 、 Figure 3 、 Figure 4 As shown, in one embodiment of the present invention, the porous structure 3 includes an outer frame 31 and a mesh plate 32 arranged outside the outer frame 31 . The outer frame 31 covers the periphery of the mesh plate 32 and is fixed to the inner side of the plate body 1 .

[0036] In a preferred embodiment of the present invention, the mesh plate 32 is an aluminum mesh, which is lightweight and low in cost. Specifically, the mesh plate 32 has an opening rate greater than 70%, a mesh rib width ≤ 0.2 mm, and a thickness ≤ 0.2 mm. In this embodiment, an aluminum mesh + noise reduction cotton + cavity (air layer) forms a resonant sound-absorbing structure. By setting an outer frame 31 and adding an aluminum mesh, and making the aluminum mesh opening rate greater than 70%, the aluminum mesh rib width ≤ 0.2 mm, and the thickness ≤ 0.2 mm, while ensuring the flatness of the noise reduction cotton 2, the noise reduction area is greatly increased. At the same time, the aluminum mesh contacts the noise reduction cotton 2 to form a porous structure, which can further enhance the noise reduction effect. Furthermore, as Figure 1 As shown, the mesh of the mesh plate 32 is diamond-shaped, and the aspect ratio of the mesh is 1:1.5 to 1:2. The mesh presents a diamond structure, and contacts with the noise reduction cotton 2 to form a slit porous structure, which can further enhance the noise reduction effect.

[0037] In other embodiments of the present invention, the porous structure 3 may also be an existing porous plate, which covers the noise reduction cotton 2 and fixes it on the inner side of the plate body 1 .

[0038] like Figure 5 As shown, in a preferred embodiment of the present invention, a V-shaped guide plate 33 is provided in the middle of one side of the outer frame 31 away from the plate body 1, so as to facilitate the oil attached to the outer frame 31 to be diverted when the range hood is in use, thereby achieving an oil guiding effect.

[0039] like Figure 1 、 Figure 5 As shown, in a preferred embodiment of the present invention, the bottom of the outer frame 31 is provided with an inclined surface 34 extending obliquely toward the plate body 1, and the inclined surface 34 is provided with an opening, which can further increase the noise reduction area and improve the noise reduction effect. Figure 5 As shown, a vertical connecting plate 35 is provided in the middle of one side of the outer frame 31 away from the plate body 1 to ensure the structural strength of the outer frame 31. Figure 1 、 Figure 3 As shown, the outer frame 31 in this embodiment can also be a split type, that is, the outer frame 31 includes an inverted U-shaped first frame 311 and a strip-shaped second frame 312 to facilitate the installation of the aluminum mesh and the noise reduction cotton 2.

[0040] like Figure 6As shown, the embodiment of the present invention further provides a range hood, comprising the above-mentioned range hood noise reduction assembly. The plate 1 is arranged opposite to the range hood fan 4 and can serve as a door panel of the air cabinet 5.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A range hood noise reduction component, characterized in that: The invention comprises a plate body (1), wherein noise reduction cotton (2) is provided on the inner side of the plate body (1), and a porous structure (3) is provided on the inner side of the noise reduction cotton (2); a first pressure profile (11) is provided on the inner side of the plate body (1) at a position corresponding to the noise reduction cotton (2), and a second pressure profile (12) is provided inside the first pressure profile (11), and the first pressure profile (11) and the second pressure profile (12) have different depths, and the depth is the distance between the surface of the first pressure profile (11) and the second pressure profile (12) and the inner surface of the plate body (1).

2. The range hood noise reduction assembly according to claim 1, characterized in that: The depth of the first press profile (11) is smaller than the depth of the second press profile (12).

3. The range hood noise reduction assembly according to claim 2, characterized in that: The first press profile (11) is rectangular, and the second press profile (12) is radial.

4. The range hood noise reduction assembly according to claim 1, characterized in that: The porous structure (3) comprises an outer frame (31) and a mesh plate (32) arranged outside the outer frame (31); the outer frame (31) covers the periphery of the mesh plate (32) and is fixed to the inner side of the plate body (1).

5. The range hood noise reduction assembly according to claim 4, characterized in that: The mesh plate (32) is an aluminum mesh.

6. The range hood noise reduction assembly according to claim 4 or 5, characterized in that: The opening rate of the mesh plate (32) is greater than 70%, the mesh rib width of the mesh plate (32) is ≤0.2 mm, and the mesh rib thickness is ≤0.2 mm.

7. The range hood noise reduction assembly according to claim 6, characterized in that: The mesh of the mesh plate (32) is diamond-shaped, and the aspect ratio of the mesh is 1:1.5 to 1:

2.

8. The range hood noise reduction assembly according to claim 4, characterized in that: A V-shaped guide plate (33) is provided in the middle of one side of the outer frame (31) away from the plate body (1).

9. The range hood noise reduction assembly according to claim 8, characterized in that: The bottom of the outer frame (31) is provided with an inclined surface (34) extending obliquely toward the plate body (1), and an opening is provided on the inclined surface (34); And / or, a vertical connecting plate (35) is provided in the middle of one side of the outer frame (31) away from the plate body (1).

10. A range hood, characterized in that: The range hood noise reduction component comprises the range hood noise reduction component according to any one of claims 1 to 9.

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