Acoustic board and range hood

Abstract

The utility model relates to the technical field of kitchen electric equipment, in particular to an acoustic board and a range hood. The sound absorption plate comprises a sound absorption plate body with a first cavity and a second cavity, a first opening and a second opening are formed in one side of the sound absorption plate body, and noise can be transmitted to the interior of the first cavity through the first opening and transmitted to the interior of the second cavity through the second opening. The second cavity is filled with sound absorption cotton, and the first cavity is a Helmholtz resonant cavity, so that the sound absorption cotton in the second cavity can be used for absorbing high-frequency-band noise in the noise to realize high-frequency noise reduction, and the sound absorption principle of the Helmholtz resonant cavity is used for absorbing middle-low-frequency-band noise in the noise to realize middle-low-frequency noise reduction; and thus, wide-frequency-band noise reduction is realized.

Description

Technical Field

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

[0002] Range hoods are usually equipped with noise reduction devices to reduce the noise generated during operation and improve the user experience. Looking at the operating noise spectrum of the range hood during operation, low- and medium-frequency noise within 1000Hz accounts for the largest proportion. Existing noise reduction devices mainly use a perforated plate + sound-absorbing material structure, which has a good noise reduction effect on high-frequency noise, but has a poor noise reduction effect on low- and medium-frequency noise with longer sound waves. Utility Model Content

[0003] The purpose of the utility model is to provide a sound absorbing panel and a range hood, which can reduce high-frequency noise and medium- and low-frequency noise, thereby achieving wide-band noise reduction.

[0004] The utility model provides a sound absorbing board, comprising a sound absorbing board main body;

[0005] A first cavity and a second cavity are formed inside the sound absorbing panel body;

[0006] A first opening and a second opening are provided on one side of the sound-absorbing panel body. The first chamber is connected to the outside through the first opening, and the first chamber is a Helmholtz resonance chamber. The second chamber is connected to the outside through the second opening, and the second chamber is filled with sound-absorbing cotton.

[0007] Furthermore, the sound absorbing panel body is formed with a hollow chamber, and a partition is provided in the hollow chamber to separate the hollow chamber into a first chamber and a second chamber.

[0008] Furthermore, the sound absorbing panel body includes a face plate, a back plate and a circumferential side plate, the face plate and the back plate are relatively spaced apart, and the circumferential side plate is arranged between the face plate and the back plate to enclose and form a hollow chamber;

[0009] The partition comprises a partition plate which is relatively arranged between the front panel and the back panel. A second chamber is formed between the partition plate and the front panel, and a first chamber is formed between the partition plate and the back panel.

[0010] Furthermore, the partition plate abuts against the back plate, and a convex cavity is formed on the partition plate, with the opening of the convex cavity facing the back plate, so as to form a first cavity between the partition plate and the back plate.

[0011] Furthermore, the first opening and the second opening are both provided on the panel;

[0012] The top of the convex cavity is connected with a sound guide tube, one end of the sound guide tube is connected with the convex cavity, and the other end of the sound guide tube is inserted into the first opening.

[0013] Furthermore, there are multiple convex cavities, which are arranged in an array on the partition. There are also multiple first openings, which are arranged in a one-to-one correspondence with the multiple convex cavities.

[0014] Furthermore, the sound-absorbing cotton is in the form of a sheet with a predetermined thickness, one side of the sound-absorbing cotton is in contact with the panel, and the other side of the sound-absorbing cotton is formed with a recessed portion for avoiding the convex cavity, and the sound-absorbing cotton is provided with a through hole for the sound-conducting tube to pass through.

[0015] Furthermore, the partition, the convex cavity and the sound-conducting tube are integrally formed.

[0016] Furthermore, there are multiple second openings, and the multiple second openings are arranged in an array.

[0017] The utility model also provides a range hood, characterized in that it comprises a smoke inlet channel, a fan and any one of the above-mentioned sound absorbing panels, the fan being arranged in the smoke inlet channel, the sound absorbing panel being fixed on the side wall of the smoke inlet channel and arranged opposite to the air inlet of the fan.

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

[0019] The sound-absorbing panel provided by the utility model includes a panel body, wherein a first chamber and a second chamber are formed inside the panel body. A first opening and a second opening are provided on one side of the panel body. The first chamber communicates with the external environment through the first opening, and the second chamber communicates with the external environment through the second opening. Furthermore, the second chamber is filled with sound-absorbing cotton, and the first chamber serves as a Helmholtz resonant cavity.

[0020] The sound-absorbing cotton has a good absorption effect on high-frequency noise, and the Helmholtz resonance cavity has a good absorption effect on medium and low-frequency noise; the sound-absorbing panel can be placed in a noisy environment, such as placing the sound-absorbing panel in the smoke inlet channel of the range hood, and making the side of the sound-absorbing panel body with the first opening and the second opening opposite to the air inlet of the fan in the smoke inlet channel; so that when the fan is running and generating noise, the noise can be transmitted to the inside of the first chamber through the first opening, so as to utilize the sound absorption principle of the Helmholtz resonance cavity to absorb the medium and low-frequency noise in the noise, thereby achieving medium and low-frequency noise reduction; at the same time, the noise can be transmitted to the inside of the second chamber through the second opening, so as to utilize the sound-absorbing cotton in the second chamber to absorb the high-frequency noise in the noise, thereby achieving high-frequency noise reduction.

[0021] Therefore, the sound-absorbing panel of the present application can absorb both high-frequency noise and medium- and low-frequency noise, thereby achieving wide-band noise reduction.

[0022] The utility model also provides a range hood comprising the sound absorbing plate, so that the range hood also has the beneficial effects of the sound absorbing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of a sound-absorbing panel provided by an embodiment of the present invention from a first viewing angle;

[0025] Figure 2 A schematic structural diagram of the sound-absorbing panel provided by an embodiment of the present utility model from a second viewing angle;

[0026] Figure 3 This is a schematic structural diagram of the sound-absorbing panel provided by an embodiment of the present utility model from a third viewing angle.

[0027] Reference numerals:

[0028] 1-panel, 11-first opening, 12-second opening, 2-back panel, 3-partition, 4-convex cavity, 5-sound-conducting tube, 6-sound-absorbing cotton, 61-recessed portion, 62-through hole, 7-first cavity, 8-second cavity. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] Refer to the following Figures 1 to 3 The present invention describes a sound absorbing panel and a range hood according to some embodiments of the present application.

[0035] The present application provides a sound absorbing panel, such as Figures 1 to 3 As shown, the sound-absorbing panel includes a panel body, which has a first chamber 7 and a second chamber 8 formed therein. A first opening 11 and a second opening 12 are provided on one side of the panel body. The first chamber 7 communicates with the external environment through the first opening 11, and the second chamber 8 communicates with the external environment through the second opening 12. Furthermore, the first chamber 7 is a Helmholtz resonant cavity, and the second chamber 8 is filled with sound-absorbing cotton 6.

[0036] The sound-absorbing cotton 6 has a good absorption effect on high-frequency noise, and the Helmholtz resonance cavity has a good absorption effect on medium and low-frequency noise; the sound-absorbing panel can be placed in a noisy environment, for example, the sound-absorbing panel can be placed in the smoke inlet channel of the range hood, and the side of the sound-absorbing panel body with the first opening 11 and the second opening 12 is opposite to the air inlet of the fan in the smoke inlet channel; so that when the fan is running and generating noise, the noise can be transmitted to the inside of the first chamber 7 through the first opening 11, so as to utilize the sound absorption principle of the Helmholtz resonance cavity to absorb the medium and low-frequency noise in the noise, thereby achieving medium and low-frequency noise reduction; at the same time, the noise can be transmitted to the inside of the second chamber 8 through the second opening 12, so as to utilize the sound-absorbing cotton 6 in the second chamber 8 to absorb the high-frequency noise in the noise, thereby achieving high-frequency noise reduction.

[0037] Therefore, the sound-absorbing panel of the present application can absorb both high-frequency noise and medium- and low-frequency noise, thereby achieving wide-band noise reduction.

[0038] In one embodiment of the present application, preferably, Figures 1 to 3 As shown, the panel body forms a hollow chamber. Specifically, the panel body includes a front panel 1, a back panel 2, and circumferential side panels. The front panel 1 and back panel 2 are spaced apart from each other, and the circumferential side panels are disposed between the front panel 1 and back panel 2. Thus, the panel body's hollow chamber is defined by the front panel 1, back panel 2, and circumferential side panels. A partition is provided within the hollow chamber of the panel body, dividing the hollow chamber into multiple compartments, serving as a first chamber 7 and a second chamber 8.

[0039] In this embodiment, preferably, the partition includes a partition 3, which is relatively arranged between the panel 1 and the back panel 2, so that a cavity is formed between the partition 3 and the panel 1 and between the partition 3 and the back panel 2, and the cavity between the partition 3 and the panel 1 is used as the second chamber 8, and the cavity between the partition 3 and the back panel 2 is used as the first chamber 7.

[0040] In this embodiment, preferably, the partition 3 is formed with a convex cavity 4 that bulges toward the panel 1, the opening of the convex cavity 4 faces the back panel 2, and the partition 3 is abutted against the back panel 2, thereby forming a first chamber 7 between the back panel 2 and the convex cavity 4 of the partition 3.

[0041] In this embodiment, when the sound-absorbing panel is installed in the smoke inlet of the range hood, the panel 1 of the panel body is preferably positioned opposite the air inlet of the fan. A second opening 12 is provided on the panel 1 and extends through the panel 1 to communicate with the second chamber 8 between the panel 1 and the partition 3. This allows noise to propagate into the second chamber 8 through the second opening 12, where the sound-absorbing cotton 6 in the second chamber 8 absorbs high-frequency sound waves.

[0042] The first opening 11 is also provided on the panel 1. A sound guide tube 5 is provided on the top of the convex cavity 4 toward the panel 1. One end of the sound guide tube 5 is connected to the convex cavity 4, and the other end of the sound guide tube 5 is inserted into the first opening 11, so that noise can be transmitted into the first cavity 7 through the sound guide tube 5, so as to utilize the sound absorption of the Helmholtz resonance cavity to absorb the mid- and low-frequency sound waves in the noise.

[0043] In this embodiment, preferably, Figure 2 As shown, a plurality of second openings 12 are provided on the panel 1 , and the plurality of second openings 12 are arranged in an array on the panel 1 to facilitate the propagation of sound waves into the second chamber 8 .

[0044] In this embodiment, preferably, Figure 2As shown, a plurality of convex cavities 4 are provided on the partition 3, and the plurality of convex cavities 4 are arranged in an array on the partition 3. The number of first openings 11 on the panel 1 is also multiple, and the plurality of first openings 11 are arranged relative to the plurality of convex cavities 4 in a one-to-one correspondence, so that the sound-conducting tube 5 of each convex cavity 4 can be inserted into the corresponding first opening 11.

[0045] The volume of the first chamber 7 and the flow cross-sectional area of ​​the sound guide tube 5 affect the sound absorption frequency band range of the Helmholtz resonance cavity. The multiple first chambers 7 can be divided into multiple groups. By adjusting the volume of the first chamber 7 or the flow cross-sectional area of ​​the sound guide tube 5, the multiple groups of first chambers 7 can have different sound absorption frequency bands, thereby achieving wide-band noise reduction for medium and low-frequency noise.

[0046] In this embodiment, preferably, Figure 3 As shown, the sound-absorbing cotton 6 is in the form of a sheet of predetermined thickness. One side of the sound-absorbing cotton 6 is in contact with the panel 1, while the other side faces the partition 3. A recessed portion 61 is formed where the sound-absorbing cotton 6 faces the convex cavity 4 to avoid the convex cavity 4 on the partition 3. A through-hole 62 is also provided where the sound-absorbing cotton 6 faces the sound-conducting tube 5 of the convex cavity 4 to allow the sound-conducting tube 5 to pass through. If there are multiple convex cavities 4, the sound-absorbing cotton 6 also has multiple recessed portions 61 and through-holes 62, corresponding one-to-one with the multiple convex cavities 4, thereby facilitating the loading of the sound-absorbing cotton 6 into the first chamber 7.

[0047] In this embodiment, preferably, the partition plate 3, the convex cavity 4 and the sound guide tube 5 are integrally formed to simplify the processing and improve the processing accuracy.

[0048] Regarding the partition, in another embodiment of the present application, preferably, the partition includes a partition, which is arranged in parallel and spaced apart between the panel and the back panel, and the cavity formed between the partition and the panel is used as the second chamber; a cavity is also formed between the partition and the back panel, and a plurality of ribs are arranged horizontally and vertically between the partition and the back panel to further divide the cavity between the partition and the back panel into multiple ribs, so as to form multiple first chambers between the partition and the back panel.

[0049] The present application also provides a range hood comprising the sound absorbing panel of any of the above embodiments.

[0050] In this embodiment, the range hood includes the sound absorbing panel, so the range hood has all the beneficial effects of the sound absorbing panel, which will not be described in detail here.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound-absorbing panel, characterized in that: including a sound absorbing panel body; A first chamber (7) and a second chamber (8) are formed inside the sound absorbing panel body; A first opening (11) and a second opening (12) are provided on one side of the sound-absorbing plate body; the first chamber (7) is communicated with the outside through the first opening (11), and the first chamber (7) is a Helmholtz resonance cavity; the second chamber (8) is communicated with the outside through the second opening (12), and the second chamber (8) is filled with sound-absorbing cotton (6).

2. The sound absorbing panel according to claim 1, wherein The sound absorbing plate body is formed with a hollow chamber, and a partition is provided in the hollow chamber to separate the hollow chamber into the first chamber (7) and the second chamber (8).

3. The sound absorbing panel according to claim 2, characterized in that: The sound absorbing panel body comprises a panel (1), a back panel (2) and a circumferential side panel, wherein the panel (1) and the back panel (2) are arranged relative to each other and spaced apart, and the circumferential side panel is arranged between the panel (1) and the back panel (2) to enclose and form the hollow chamber; The partition comprises a partition (3), wherein the partition (3) is relatively arranged between the panel (1) and the back panel (2), the second chamber (8) is formed between the partition (3) and the panel (1), and the first chamber (7) is formed between the partition (3) and the back panel (2).

4. The sound absorbing panel according to claim 3, characterized in that: The partition (3) abuts against the back plate (2), and a convex cavity (4) is formed on the partition (3), the opening of the convex cavity (4) faces the back plate (2), so as to form the first cavity (7) between the partition (3) and the back plate (2).

5. The sound absorbing panel according to claim 4, characterized in that: The first opening (11) and the second opening (12) are both provided on the panel (1); The top of the convex cavity (4) is connected to a sound guide tube (5), one end of the sound guide tube (5) is connected to the convex cavity (4), and the other end of the sound guide tube (5) is inserted into the first opening (11).

6. The sound absorbing panel according to claim 4, characterized in that There are multiple convex cavities (4), and the multiple convex cavities (4) are arranged in an array on the partition (3). There are also multiple first openings (11), and the multiple first openings (11) are arranged in a one-to-one correspondence with the multiple convex cavities (4).

7. The sound absorbing panel according to claim 5, characterized in that: The sound-absorbing cotton (6) is in the form of a sheet with a predetermined thickness. One side of the sound-absorbing cotton (6) is in contact with the panel (1). The other side of the sound-absorbing cotton (6) is formed with a recessed portion (61) for avoiding the convex cavity (4). The sound-absorbing cotton (6) is provided with a through hole (62) for the sound guide tube (5) to pass through.

8. The sound absorbing panel according to claim 5, characterized in that: The partition plate (3), the convex cavity (4) and the sound guide tube (5) are integrally formed.

9. The sound absorbing panel according to claim 1, wherein There are a plurality of second openings (12), and the plurality of second openings (12) are arranged in an array.

10. A range hood, characterized in that: It comprises a smoke inlet channel, a fan and the sound absorbing plate according to any one of claims 1 to 9, wherein the fan is arranged in the smoke inlet channel, and the sound absorbing plate is fixed on the side wall of the smoke inlet channel and arranged opposite to the air inlet of the fan.

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