Super-micropore sound nest sound absorption veneer

Abstract

The invention relates to the field of noise control, in particular to an ultramicropore sound nest sound absorption veneer. The invention provides an ultramicropore sound nest sound absorption veneer which comprises a shell, an accommodating cavity is formed in the shell, and a first through hole is formed in the surface of the shell; and the sound absorption assembly is arranged in the accommodating cavity. The multiple sound absorbers are installed in the shell, so that the whole structure is wide in sound absorption frequency band and good in noise reduction effect, and the average sound absorption coefficient within the frequency range of 100-8000 HZ is larger than 0.80. The sound absorber is simple in structure, convenient to manufacture, simple and convenient to assemble, flame-retardant in material, environment-friendly, clean, and stable and reliable in use performance. And on the premise that the sound absorption and noise reduction efficiency of the shell and the sound absorber is optimal, the product manufacturing cost is low, the practical value is obviously improved, and large-area popularization and application are facilitated.

Description

Technical Field

[0001] The invention relates to the field of noise control, and in particular to an ultra-microporous sound-dimpled sound-absorbing single board. Background Art

[0002] With the continuous development of social modernization, various cultural, sports and entertainment venues and buildings that adapt to the times are constantly emerging, and at the same time, high requirements are placed on the indoor sound absorption and noise reduction standards of these buildings. Not only are the sound-absorbing materials required to have superior acoustic properties, but they must also have good decorative effects.

[0003] However, the sound absorption resonance frequency of the existing sound absorption structure tends to be high frequency, and it is impossible to obtain an ideal sound absorption effect in a wider frequency range. Summary of the invention

[0004] In order to solve the technical problem that the sound absorption resonance frequency of the existing sound absorption structure tends to be high frequency and cannot obtain the ideal sound absorption effect in a wider frequency range, an object of the present invention is to provide an ultra-microporous sound dimple sound absorption single plate.

[0005] To achieve the above object, an embodiment of the present invention provides an ultra-microporous acoustic dimple sound-absorbing single board, comprising:

[0006] A shell body, wherein a receiving cavity is provided inside, and a first through hole is opened on the surface of the shell body;

[0007] The sound absorbing component is arranged inside the accommodating cavity.

[0008] In the above technical solution, the sound absorbing component includes:

[0009] A plurality of sound absorbers are arranged side by side inside the accommodating cavity, and a second through hole is opened on the sound absorber.

[0010] In the above technical solution, the cross-sectional shape of the sound absorber is a spiral line.

[0011] In the above technical solution, the diameter of the first through hole is 0.3 mm-0.55 mm, and the perforation rate of the first through hole on the shell is 0.6-1.5%.

[0012] In the above technical solution, the diameter of the second through hole is 0.15 mm-0.25 mm, and the perforation rate of the second through hole on the sound absorber is 0.6-1.2%.

[0013] In the above technical solution, the length of the shell is 1000mm-5000mm, the width is 300mm-1000mm, and the thickness is 50mm-120mm.

[0014] In the above technical solution, the thickness of the sound absorber is 0.2mm-0.6mm.

[0015] In the above technical solution, the shell is made of aluminum alloy.

[0016] In the above technical solution, fireproof material is provided on the outside of the shell.

[0017] In the above technical solution, an inclined piece is connected to the center of the cross section of the sound absorber.

[0018] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the housing of the present invention;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the sound absorber of the present invention;

[0023] in, Figures 1 to 3 The corresponding relationship between the reference numerals and component names in the figure is:

[0024] 1. Shell; 2. Sound absorber; 3. Inclined sheet. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0027] Refer to the following Figures 1 to 3 Some embodiments of the ultra-microporous acoustic dimple sound-absorbing single board of the present invention are described.

[0028] like Figures 1 to 3 As shown, an embodiment of the present invention provides an ultra-microporous acoustic dimple sound-absorbing single board, comprising a shell 1 and a sound-absorbing component.

[0029] Specifically, a receiving cavity is provided inside the shell 1, and a first through hole is opened on the surface of the shell 1; and the sound absorbing component is provided inside the receiving cavity.

[0030] When external sound waves are emitted, the sound waves pass through the multiple first through holes opened on the surface of the shell 1, and then enter the interior of the accommodating cavity. In this process, since the aperture of the first through holes is very small and the number is large, the acoustic resistance of the sound waves passing through the first through holes is very large, the sound mass is very small, and the sound absorption band of the ultra-micropores is very wide, so that the shell 1 can absorb sound in a wide band. A part of the sound waves entering the interior of the accommodating cavity will enter the sound absorbing component, and the sound wave will be reflected and refracted multiple times inside the sound absorbing component, thereby reducing the energy of the sound wave. Another part of the sound waves that have not entered the sound absorbing component will hit the sound absorbing component, and then be reflected on the inner wall of the shell 1 after passing through the outer wall of the sound absorbing component or pass through the first through holes to enter the external environment, further reducing the energy of the sound wave and improving the sound absorption effect of the entire device.

[0031] like Figures 1 to 3 As shown, in one embodiment of the present invention, the sound absorbing component includes:

[0032] A plurality of sound absorbers 2 are arranged side by side inside the accommodating cavity, and a second through hole is opened on the sound absorber 2 .

[0033] The cross-sectional shape of the sound absorber 2 is a spiral line.

[0034] The aperture of the first through hole is 0.3 mm-0.55 mm, and the perforation rate of the first through hole on the housing 1 is 0.6-1.5%.

[0035] The aperture of the second through hole is 0.15 mm-0.25 mm, and the perforation rate of the second through hole on the sound absorber 2 is 0.6-1.2%.

[0036] The shell 1 has a length of 1000mm-5000mm, a width of 300mm-1000mm, and a thickness of 50mm-120mm.

[0037] The thickness of the sound absorber 2 is 0.2 mm-0.6 mm.

[0038] The housing 1 includes a top plate, a bottom plate, a left plate, a right plate, a front plate and a rear plate, the thickness of which is 0.8mm-1.5mm, and the top plate, the bottom plate, the left plate, the right plate, the front plate and the rear plate form a rectangular parallelepiped structure, with a cavity inside, the length of the rectangular parallelepiped is 1000mm-5000mm, the width is 300mm-1000mm, the thickness is 50mm-120mm, and the specific size is determined according to actual use requirements. The first through holes are evenly opened on the side wall of the housing 1, and the aperture of the first through holes is 0.3mm-0.55mm, and the specific size is determined according to actual use requirements.

[0039] A plurality of sound absorbers 2 are arranged side by side inside the receiving cavity. The sound absorber 2 is a structure similar to a cylinder formed by rolling a panel with a plurality of second through holes, so that the cross-sectional shape of the sound absorber 2 is a spiral line, so that continuous chambers of different sizes are formed inside the sound absorber 2. Both ends of the sound absorber 2 are in contact with the inner wall of the receiving cavity, and two adjacent sound absorbers 2 are in contact with each other, so that the plurality of sound absorbers 2 arranged side by side fill the entire receiving cavity. Since the plurality of sound absorbers 2 are in contact with the inner wall of the shell 1, they can provide a certain support effect on the shell 1, thereby improving the structural strength of the entire shell 1.

[0040] When the sound wave passes through the first through hole on the shell 1, since the aperture of the first through hole is between 0.3-0.55mm, the number of the first through holes is large and the aperture is small, the first through hole has a good resonant sound absorption effect. After the sound wave passes through the first through hole and enters the interior of the accommodating cavity, the first part of the sound wave will impact the outer surface of the sound absorber 2, and the sound wave will be reflected to impact the inner wall of the shell 1 again or pass through the first through hole again to enter the external environment. In the process of passing through the first through hole from the accommodating cavity to the external environment, the sound wave can be resonantly absorbed again. The rest of the sound waves of the first part stay in the shell 1. Through multiple reflections between the sound absorber 2 and the inner wall of the shell 1, the sound energy density of the noise entering the interior of the accommodating cavity can be greatly reduced, thereby reducing noise. The second part of the sound waves will directly pass through the second through hole into the sound absorber 2. The size of the second through hole is 0.15-0.25 mm. The specific size is determined according to actual use requirements. Since the cross-sectional shape of the sound absorber 2 is a spiral line, a plurality of continuous chambers of different sizes are formed inside the sound absorber 2. Due to the hollow structure of the chamber, the air flow is prevented, so that the sound waves are hindered, which can effectively block the propagation of the sound waves and improve the sound absorption coefficient. In the process of the second part of the sound wave passing through the second through hole, the second through hole produces a resonant sound absorption effect on the sound wave, further reducing noise. After the second sound wave passes through the second through hole and enters the interior of the sound absorber 2, since the cavity is spiral, the sound wave can be repeatedly reflected inside the cavity, and the angle of each reflection is different, so that the sound wave can pass through the second through hole every time it is reflected, achieving a resonant sound absorption effect. Another part of the sound wave will impact the inner wall of the sound absorber 2, and the sound wave will be reflected on the sound absorber 2, resulting in a reduction in the energy of the sound wave. Since the second part of the sound wave directly passes through the second through hole and enters the interior of the sound absorber 2, the sound wave will move to the outside of the cavity and to the center of the cavity. The direction of the sound wave reflection is irregular, but the sound energy can be reduced during the sound wave reflection process, reducing the propagation of noise to the external environment. The third part of the sound wave will enter the entrance of the chamber and hit the inner wall of the sound absorber 2 at the entrance of the chamber. Since the deflection direction of the spiral structure arc of the cross-section of the sound absorber 2 is set according to actual use requirements, when the third part of the sound wave hits the inner wall of the sound absorber 2 at the entrance of the chamber, the sound wave reflection direction is toward the depth of the chamber, and then after the third part of the sound wave is reflected multiple times, it will enter the center of the chamber, and then the third part of the sound wave has a regular reflection movement, which can greatly improve the resonance sound absorption effect of the second through hole on the sound absorber 2 on the third part of the sound wave, and further improve the noise reduction function of the device.

[0041] In addition, since the outer wall of the sound absorber 2 is in an arc shape, when the sound wave impacts the outer wall of the sound absorber 2, the sound wave can be reflected at multiple different angles, and each time the sound wave is reflected between the sound absorber 2 and the inner wall of the shell 1, the reflection direction of the sound wave will change, and the sound wave can be repeatedly absorbed by the sound absorber 2. In addition, the sound waves that do not impact the outer wall of the sound absorber 2 will pass through the second through hole into the inside of the sound absorber 2, and will be reflected multiple times inside the sound absorber 2, thereby reducing the energy of the sound wave.

[0042] In addition, according to the microporous resonance sound absorption theory, the resonance frequency of the shell 1 is inversely proportional to the square root of the depth of the air layer inside the shell 1. Therefore, the inconsistent air layer thickness between the shell 1 and the center of the cross section of the sound absorber 2 can form multiple resonance frequencies, thereby widening the sound absorption frequency band.

[0043] Through the above structure, sound waves can achieve a resonance sound absorption effect multiple times during the reflection process, which greatly reduces the density of sound waves and improves the sound absorption effect of the entire device.

[0044] For example, the length of the shell 1 is 1100mm-1200mm, the width is 400mm-500mm, the thickness is 50mm-120mm, and the thickness of the front plate, rear plate, left plate, right plate, top plate and bottom plate of the shell 1 is 0.8mm-1.5mm. Twenty shells 1 are selected and spliced ​​to form a large rectangular surface, which is placed in the reverberation chamber. The volume of the reverberation chamber is 200-300m 3 , release sound waves of different frequencies in the reverberation chamber, and test the sound absorption coefficient of 20 shells to sound waves. The specific sound absorption coefficients are shown in the following table:

[0045]

[0046] According to the above experimental data, the average sound absorption coefficients at 250Hz, 5000Hz, 10000Hz and 20000Hz are greater than 0.8, and it is concluded that the present application has a good sound absorption effect.

[0047] like Figure 1 As shown, in one embodiment of the present invention, the housing 1 is made of aluminum alloy.

[0048] By making the housing 1 from aluminum alloy or stainless steel, the overall weight of the device can be greatly reduced and the difficulty of transportation can be reduced.

[0049] like Figure 1 As shown, in one embodiment of the present invention, the shell 1 is provided with fireproof material on the outside.

[0050] By coating the outer surface of the housing 1 with fireproof material, the device can be prevented from catching fire and losses can be reduced. In addition, the whole structure has excellent acoustic performance and good decorative effect.

[0051] like Figure 3 As shown, in one embodiment of the present invention, an inclined sheet 3 is connected to the center of the cross section of the sound absorber 2 .

[0052] By fixing the inclined sheet 3 at the center of the cross section of the sound absorber 2, the angle between the inclined sheet 3 and the tangent at the center of the cross section of the sound absorber 2 is between 30 degrees and 60 degrees. The angle of the present invention is 45 degrees. When the sound wave enters the deepest part of the chamber, the inclined sheet 3 can block the sound wave, reducing the sound wave entering the deepest part of the chamber and returning to the outside of the chamber again, thereby further improving the sound absorption effect of the entire device.

[0053] The entire structure is merely composed of a plurality of sound absorbers 2 with spiral cross-sections and a shell 1 with a rectangular parallelepiped shape, and has low manufacturing cost and simple manufacturing process.

[0054] The present invention has the following advantages:

[0055] 1. By installing multiple sound absorbers 2 inside the shell 1, the sound absorption frequency band of the entire structure is wide and the noise reduction effect is good. The average sound absorption coefficient in the frequency range of 100 to 8000HZ is greater than 0.80.

[0056] 2. It consists of only a shell 1 and a plurality of sound absorbers 2, with a simple structure, convenient manufacturing and assembly, flame retardant and environmentally friendly purification materials, and stable and reliable performance.

[0057] 3. Under the premise of ensuring the best sound absorption and noise reduction performance, the shell 1 and the sound absorber 2 have low manufacturing costs and significantly improved practical value, which is conducive to large-scale promotion and application.

[0058] In the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0060] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultra-microporous sound-absorbing single board, characterized in that: include: A shell (1) is provided with a receiving cavity inside, and a first through hole is opened on the surface of the shell (1); The sound absorbing component is arranged inside the accommodating cavity.

2. The ultra-microporous sound-dimpled sound-absorbing single board according to claim 1, characterized in that: The sound absorbing component comprises: A plurality of sound absorbers (2) are arranged side by side inside the accommodating cavity, and a second through hole is provided on the sound absorber (2).

3. The ultra-microporous acoustic dimple sound-absorbing single board according to claim 2, characterized in that: The cross-sectional shape of the sound absorber (2) is a spiral line.

4. The ultra-microporous acoustic dimple sound-absorbing single board according to claim 1, characterized in that: The aperture of the first through hole is 0.3 mm-0.55 mm, and the perforation rate of the first through hole on the shell (1) is 0.6-1.5%.

5. The ultra-microporous acoustic dimple sound-absorbing single board according to claim 2, characterized in that: The diameter of the second through hole is 0.15 mm-0.25 mm, and the perforation rate of the second through hole on the sound absorber (2) is 0.6-1.2%.

6. The ultra-microporous acoustic dimple sound-absorbing single board according to claim 1, characterized in that: The shell has a length of 1000mm-5000mm, a width of 300mm-1000mm, and a thickness of 50mm-120mm.

7. The ultra-microporous acoustic dimple sound-absorbing single board according to claim 2, characterized in that: The thickness of the sound absorber is 0.2 mm-0.6 mm.

8. The ultra-microporous acoustic dimple sound-absorbing single board according to claim 1, characterized in that: The housing (1) is made of aluminum alloy.

9. The ultra-microporous acoustic dimple sound-absorbing single board according to claim 1, characterized in that: The shell (1) is provided with fireproof material on the outside.

10. The ultra-microporous acoustic dimple sound-absorbing single board according to claim 2, characterized in that: An inclined sheet (3) is connected to the center of the cross section of the sound absorber (2).

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