Silent plate and range hood

Abstract

The utility model relates to the technical field of range hoods, and provides a mute plate and a range hood. The mute plate comprises a perforated plate, a plurality of small holes are formed in the surface of one side of the perforated plate, a plurality of cavities which are not communicated with one another are formed in the inner side of the perforated plate, the small holes are communicated with the cavities to form a plurality of Helmholtz resonant cavities, and at least two Helmholtz resonant cavities are different. According to the mute plate provided by the utility model, the plurality of different Helmholtz resonant cavities are connected in parallel, so that noise with different frequencies generated by the range hood can be effectively absorbed and reduced, and a better sound absorption effect is realized. Therefore, the interference of noise to the living environment can be reduced, the living comfort is improved, and the hearing health of the user can be protected.

Description

Technical Field

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

[0002] The Helmholtz resonance cavity is a commonly used noise reduction structural design unit. In the related art, the range hood will form a silent plate by connecting the Helmholtz resonance cavities in parallel, so as to achieve the effect of sound absorption and noise reduction of the range hood. However, in the related art, the silent plate formed by connecting the Helmholtz resonance cavities in parallel has a relatively narrow effective sound absorption frequency band, and the sound absorption effect is not ideal. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model proposes a mute board to achieve broadband sound absorption and noise reduction of the mute board.

[0004] The utility model also provides a range hood.

[0005] The utility model provides a sound-proof board, comprising:

[0006] A perforated plate, wherein a plurality of small holes are formed on one side surface of the perforated plate, and a plurality of cavities which are not connected to each other are formed on the inner side of the perforated plate, wherein the small holes are connected to the cavities to form a plurality of Helmholtz resonance cavities, and at least two of the Helmholtz resonance cavities are different.

[0007] The mute board proposed in the utility model can effectively absorb and reduce the noise with different frequencies generated by the range hood by connecting multiple different Helmholtz resonance cavities in parallel, thereby achieving a better sound absorption effect. In this way, it can not only reduce the interference of noise on the living environment and improve the living comfort, but also help protect the hearing health of users.

[0008] According to an embodiment of the utility model, the hole wall of the small hole protrudes from the inner side of the perforated plate, the hole depths of at least two small holes of the Helmholtz resonance cavity are inconsistent, and / or the apertures of at least two small holes of the Helmholtz resonance cavity are inconsistent.

[0009] According to an embodiment of the present invention, a plurality of small holes of the Helmholtz resonance cavity are arranged in an array on the perforated plate.

[0010] According to an embodiment of the present invention, the cross-sections of the cavities of the multiple Helmholtz resonance cavities are rectangular, and / or the volumes of all the cavities are equal.

[0011] According to an embodiment of the present invention, a plurality of the cavities are arranged in an array on the perforated plate.

[0012] According to an embodiment of the present invention, the shape of the silent plate is rectangular.

[0013] According to an embodiment of the present invention, the diameter of the small hole is 0.1 mm-5 mm, and / or the perforation rate of the perforated plate is less than 10%.

[0014] According to an embodiment of the utility model, it also includes an oil-isolating layer, and the oil-isolating layer is arranged on a side surface of the perforated plate where the small holes are opened.

[0015] According to one embodiment of the utility model, the thickness of the oil-isolating layer is 1.5 mm-2.5 mm, and / or the oil-isolating layer is an oil-isolating cotton layer or an oil-isolating board.

[0016] The utility model also provides a range hood, comprising:

[0017] A housing having an air duct and a smoking port connected thereto;

[0018] A volute, the volute being arranged at one end of the air duct;

[0019] The above-mentioned silent plate is arranged inside the shell.

[0020] The range hood proposed in the utility model includes the above-mentioned mute plate, and thus also has the beneficial effects of the above-mentioned mute plate, which will not be described in detail here.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the range hood provided by the utility model, wherein the decorative panel is removed;

[0024] Figure 2 yes Figure 1 A partial enlarged view of point B;

[0025] Figure 3 It is another schematic diagram of the structure of a range hood provided by the utility model, in which the decorative panel is removed;

[0026] Figure 4It is a schematic diagram of another range hood structure provided by the utility model;

[0027] Figure 5 yes Figure 4 The cross-section along the AA direction;

[0028] Figure 6 yes Figure 5 A local enlarged view of point A;

[0029] Reference numerals:

[0030] 10. Range hood;

[0031] 11. Silent plate; 12. Volute; 13. Shell;

[0032] 110, perforated plate; 111, small hole; 112, cavity; 113, Helmholtz resonant cavity;

[0033] 120. Grease barrier;

[0034] 130. Decorative panels. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0036] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0038] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 utility model embodiment. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] In the related art, the range hood generates noise when in use, and the main noise in the range hood comes from the vibration of the volute. Therefore, it is necessary to install a mute plate near the volute to absorb and reduce the noise from the source.

[0041] like Figure 1 , Figure 2 and Figure 6 As shown, the utility model proposes a silent plate 11, including a perforated plate 110, a plurality of small holes 111 are opened on one side surface of the perforated plate 110, and a plurality of cavities 112 that are not connected to each other are provided on the inner side of the perforated plate 110, and the small holes 111 are connected with the cavities 112 to form a plurality of Helmholtz resonance cavities 113, and at least two Helmholtz resonance cavities 113 are different. It should be noted that different Helmholtz resonance cavities 113 may have the same volume of the cavity 112, but different apertures, different perforation rates, or different depths of the small holes 111. In some other examples of the utility model, different Helmholtz resonance cavities 113 may also have the same aperture, but different volumes of the cavity 112, different perforation rates, or different depths of the small holes 111.

[0042] Since the parameters that affect the resonance frequency of the Helmholtz resonance cavity 113 are the volume of the cavity 112, the perforation rate, the aperture, and the depth of the small hole 111 of the Helmholtz resonance cavity 113, the low-frequency and wide-band sound absorption effect of the noise generated by the range hood 10 is achieved by connecting at least two Helmholtz resonance cavities 113 with different parameters in parallel. By finely adjusting the parameters of each Helmholtz resonance cavity 113, the behavior of the sound wave in the resonance cavity can be more accurately controlled, thereby improving the absorption efficiency of noise of a specific frequency. This method can provide a more effective noise reduction solution for the complex noise spectrum generated by equipment such as the range hood 10.

[0043] According to the mute plate 11 of the embodiment of the utility model, by connecting a plurality of different Helmholtz resonance cavities 113 in parallel, the noise with different frequencies generated by the range hood 10 can be effectively absorbed and reduced, thereby achieving a better sound absorption effect. In this way, it is not only possible to reduce the interference of noise on the living environment and improve living comfort, but also to help protect the hearing health of users. In addition, in commercial environments, such as restaurants, the range hood 10 using this mute plate can provide a quieter and more comfortable dining environment, thereby improving customer satisfaction.

[0044] like Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the hole wall of the small hole 111 protrudes from the inner side of the perforated plate 110, the hole depths of the small holes 111 of at least two Helmholtz resonance cavities 113 are inconsistent, and the apertures of the small holes 111 of at least two Helmholtz resonance cavities 113 are inconsistent. Alternatively, in some other embodiments of the present invention, the hole depths of the small holes 111 of at least two Helmholtz resonance cavities 113 are inconsistent, or the apertures of the small holes 111 of at least two Helmholtz resonance cavities 113 are inconsistent. In this way, the setting of different hole depths and apertures allows the mute plate to absorb noise in a specific frequency range more accurately. In this way, no matter how the frequency characteristics of the noise change, by adjusting the combination of aperture and hole depth, the sound absorption effect can be effectively optimized to achieve noise control in a wider frequency range.

[0045] In some embodiments of the present invention, a plurality of small holes 111 of the Helmholtz resonance cavity 113 are arranged in an array on the perforated plate 110, so that the design of the mute plate can be more flexible and can be optimized according to specific application environments and space requirements. For example, the layout and density of the small holes 111 can be adjusted according to the size and shape of the range hood 10 to achieve the best noise control effect.

[0046] like Figure 5 and Figure 6As shown, in some embodiments of the present invention, the cross-section of the cavity 112 of the multiple Helmholtz resonance cavities 113 is rectangular, and the volumes of all the cavities 112 are equal. Of course, the arrangement of the Helmholtz resonance cavity 113 is not limited thereto. In other embodiments, the cross-section of the cavity 112 of the multiple Helmholtz resonance cavities 113 is rectangular, and the volumes of at least two cavities 112 are not equal.

[0047] Among them, the cavity 112 with a rectangular cross-section can more effectively absorb noise of a specific frequency, especially has a better absorption effect on low-frequency noise. At the same time, by adjusting the volume of the cavity 112, the sound absorption performance can be further optimized and precise control of noise of different frequencies can be achieved. By setting cavities 112 of different volumes, a customized design can be performed according to specific noise control requirements. For example, for a range hood 10 that generates noise of multiple frequencies, the effective absorption of noise of various frequencies can be achieved by adjusting the size of the volume of the cavity 112. In addition, the cavity 112 with a rectangular cross-section can better adapt to the internal space of equipment such as the range hood 10, making the design of the mute panel more compact and efficient. At the same time, by adjusting the volume of the cavity 112, space utilization can be further optimized and the sound absorption effect can be improved.

[0048] like Figure 1 and Figure 3 As shown, in some embodiments of the utility model, a plurality of cavities 112 are arranged in an array on the perforated plate 110. In this way, the cavities 112 arranged in an array can cover a wider frequency range, and the absorption of sound waves is enhanced through the interaction of different cavities 112. This layout is conducive to improving the absorption efficiency of the overall structure for noise of various frequencies, especially when dealing with broadband noise. In addition, the array layout makes the sound absorption function evenly distributed on the entire surface of the perforated plate 110, which helps to avoid dead corners of sound absorption and ensure that sound waves can be fully absorbed. This can more effectively reduce noise and improve the consistency of acoustic performance.

[0049] By adjusting the distribution, size and spacing of the cavities 112 on the perforated plate 110, the design can be optimized for a specific noise spectrum and intensity. This flexibility allows designers to customize the silent panel according to specific application requirements and space constraints to achieve the best noise control effect. The array layout of the cavities 112 can be designed to enhance the structural stability of the perforated plate 110 and increase the overall strength and durability of the panel. This design can also optimize the propagation path of sound waves within the panel and improve the efficiency of the use of sound absorbing materials.

[0050] like Figure 1 , Figure 3 and Figure 4As shown, in order to make the silent plate 11 fit the shell 13 of the range hood 10 as a whole, in one embodiment of the utility model, the shape of the silent plate 11 is rectangular. In this embodiment, when the silent plate 11 is produced, the aperture of the small hole 111 and the area of ​​each cavity 112 are first determined to ensure that the area of ​​each cavity 112 and the diameter of the small hole 111 are consistent. Then, by adjusting the number and height of the small holes 111 on each cavity 112, the sound absorption coefficient can be precisely controlled. This design method not only achieves effective absorption of low-frequency broadband noise, but also ensures the rectangular shape of the silent plate 11, making it easier to design and install the structure.

[0051] like Figure 1 As shown, in one embodiment of the utility model, the aperture of the small hole 111 is 0.1mm-5mm. In this way, the silent plate 11 can absorb sound waves of different frequencies, including high frequency and some low-frequency noise. Smaller apertures are conducive to absorbing high-frequency sound waves, while larger apertures help absorb lower-frequency sound waves, thereby achieving a wide-band sound absorption effect. By precisely controlling the aperture size, the interaction between the sound waves and the silent plate 11 can be optimized and the sound absorption efficiency can be enhanced. The holes with a diameter of the small hole 111 can increase the friction between the sound waves and the surface of the material, promote the conversion of sound energy into heat energy, and thus improve the sound absorption efficiency. In order to further improve the noise reduction frequency band of the silent plate 11, in some other embodiments of the utility model, the aperture of the small hole 111 is 0.1mm-5mm, and the perforation rate of the perforated plate 110 is less than 10%.

[0052] like Figure 6 As shown, in one embodiment of the present invention, the mute plate 11 further includes an oil-isolating layer 120, which is disposed on a side surface of the perforated plate 110 where the small hole 111 is provided. In the range hood 10, oil smoke and grease particles may enter the interior of the mute plate 11 through the small hole 111, and the oil-isolating layer 120 can effectively prevent the entry of grease, prevent the accumulation of oil stains inside the mute plate 11, and maintain the sound absorption performance of the mute plate 11. At the same time, the oil-isolating layer 120 can make it easier to remove grease and other stains from the surface of the mute plate 11, reduce the difficulty of cleaning and maintenance, and extend the service life of the mute plate 11.

[0053] In some embodiments of the present invention, the thickness of the oil-isolating layer 120 is 1.5 mm to 2.5 mm, which can effectively prevent grease from penetrating without excessively increasing the overall thickness of the silent board 11, thereby maintaining a compact design of the device. This thickness range takes into account both the oil-isolating effect and the requirement of keeping the silent board 11 thin and light.

[0054] In some embodiments of the present invention, the oil-isolating layer 120 may be an oil-isolating cotton layer. When the oil-isolating cotton is used as the material of the oil-isolating layer 120, it can provide better oil absorption performance and softness, so that it can absorb and lock grease particles. The oil-isolating cotton layer also helps to reduce noise because it has certain sound absorption properties.

[0055] Alternatively, in some other embodiments of the present invention, the oil-isolating layer 120 may also be an oil-isolating board. When the oil-isolating board is selected as the material, better physical protection and an easy-to-clean surface can be provided.

[0056] like Figure 6 As shown, in some embodiments of the present invention, the mute plate 11 further includes a decorative plate 130, and the perforated plate 110 is disposed between the decorative plate 130 and the oil barrier layer 120. This not only increases the aesthetics of the mute plate 11, but also provides designers with more design freedom, so that the range hood 10 can be better integrated into different interior design styles. The decorative plate 130 can be made of various materials and colors to meet different decoration requirements.

[0057] like Figure 3 and Figure 4 As shown, the utility model also provides a range hood 10, comprising a housing 13, a volute 12 and the above-mentioned mute plate 11. The housing 13 has a connected air duct and a smoke outlet, the volute 12 is arranged at one end of the air duct, and the mute plate 11 is arranged inside the housing 13.

[0058] The range hood 10 proposed in the present invention includes the above-mentioned mute plate, and thus also has the beneficial effects of the above-mentioned mute plate, which will not be described in detail here.

[0059] Finally, it should be noted that the above implementation modes are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A mute board, characterized in that: include: A perforated plate, wherein a plurality of small holes are formed on one side surface of the perforated plate, and a plurality of cavities which are not connected to each other are formed on the inner side of the perforated plate, wherein the small holes are connected to the cavities to form a plurality of Helmholtz resonance cavities, and at least two of the Helmholtz resonance cavities are different.

2. The soundproof panel according to claim 1, characterized in that: The hole wall of the small hole protrudes from the inner side of the perforated plate, the hole depths of the small holes of at least two of the Helmholtz resonance cavities are inconsistent, and / or the hole diameters of the small holes of at least two of the Helmholtz resonance cavities are inconsistent.

3. The soundproof panel according to claim 1, characterized in that: The small holes of the plurality of Helmholtz resonance cavities are arranged in an array on the perforated plate.

4. The soundproof board according to claim 1, characterized in that: The cross-section of the cavity of the multiple Helmholtz resonant cavities is rectangular, and / or the volumes of all the cavities are equal.

5. The soundproof panel according to claim 1, characterized in that: A plurality of the cavities are arranged in an array on the perforated plate.

6. The soundproof panel according to any one of claims 1 to 5, characterized in that: The shape of the silent plate is rectangular.

7. The soundproof panel according to any one of claims 1 to 5, characterized in that: The aperture of the small hole is 0.1 mm-5 mm, and / or the perforation rate of the perforated plate is less than 10%.

8. The soundproof panel according to any one of claims 1 to 5, characterized in that: It also includes an oil-isolating layer, which is arranged on a side surface of the perforated plate where the small holes are opened.

9. The soundproof panel according to claim 8, characterized in that: The thickness of the oil-isolating layer is 1.5 mm-2.5 mm, and / or the oil-isolating layer is an oil-isolating cotton layer or an oil-isolating board.

10. A range hood, characterized in that: include: A housing having an air duct and a smoking port connected thereto; A volute, the volute being arranged at one end of the air duct; The silent plate according to any one of claims 1 to 9, wherein the silent plate is arranged inside the shell.

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