Silencer for noise control of cabinet equipment

Abstract

The utility model discloses a silencer for cabinet equipment noise control, which comprises a shell and a plurality of shutter assemblies arranged in the shell at equal intervals, gaps among the shutter assemblies are ventilation openings, each shutter assembly comprises a third sound absorption block, a plurality of bent expansion pipeline containers are uniformly arranged in the third sound absorption block, and the third sound absorption block is provided with a second sound absorption block. The bending direction of the bent expansion pipeline container is consistent with the ventilation direction of the ventilation opening, and the opening end of the bent expansion pipeline container extends to the upper surface of the third sound absorption block. According to the utility model, the third sound absorption block is made of a sound absorption material and can be used for silencing, the bent expansion pipeline container can absorb sound waves, and the sound waves flow into the closed expansion cavity through the internal slender cavity to generate periodic vibration, so that not only are the functions of noise reduction, sound absorption, noise elimination and vibration isolation realized, but also the function of air circulation is realized, and the requirements of noise reduction and ventilation of the cabinet ventilation opening can be met; and noise pollution caused by the cabinet equipment to the external environment can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of silencer technology, specifically a silencer for noise control of cabinet equipment. Background Technology

[0002] Server racks typically have fans at the inlet and outlet to cool the internal equipment, and these inlets and outlets are often equipped with louvers to prevent foreign objects from entering. However, when the fans are operating, the airflow through the louvers generates significant noise, categorized into low, medium, and high frequency bands, causing noise pollution to the surrounding environment. This is because high-speed airflow creates turbulence as it passes through the narrow channels of the inlet and outlet louvers, and the pressure fluctuations generated by this turbulence propagate as sound waves, thus creating noise. Chinese Patent CN213574857U discloses a ventilation and cooling silencer for electrical instrument racks. This device utilizes several sound-absorbing plates to optimize aerodynamic performance while achieving noise reduction, minimizing drag loss and impacting the cooling of the original cooling fan. The silencer's design also meets the requirements of existing space for construction and daily inspection. However, for applications with strict requirements on rack height, such as converter equipment racks, where the racks are typically installed in specific cabins, the noise level inside the cabin... The equipment height is strictly limited. The usable height of the cabinet air vent silencer is usually no more than 150mm. However, the height of a conventional silencer, such as the one with the announcement number CN213574857U, is at least 500mm, which exceeds the usable height. Although the silencer patent with the announcement number CN117560892A meets the "compact" design scheme, it can only reduce noise by 8-10dB due to the limited internal space. Moreover, it cannot meet the internal heat dissipation requirements for cabinets with high air velocity, and its sound absorption effect in the mid-to-low frequency range is not good.

[0003] Therefore, how to design a cabinet that meets the requirements for cabinet size, high-power cabinet heat dissipation and ventilation, and achieves noise reduction while also achieving wideband noise reduction within a limited space is a major problem that urgently needs to be solved. Utility Model Content

[0004] The purpose of this invention is to overcome or at least partially solve the above-mentioned problems by proposing a silencer for noise control of cabinet equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a silencer for noise control of cabinet equipment, comprising a shell and a plurality of louvered components equidistantly arranged within the shell, wherein the gap between each louvered component is a ventilation opening, and each louvered component includes a third sound-absorbing block, wherein a plurality of bent expansion pipe containers are evenly arranged within the third sound-absorbing block, wherein the bending direction of the bent expansion pipe containers is consistent with the ventilation direction of the ventilation opening, and the open end extends to the upper surface of the third sound-absorbing block.

[0006] In a preferred embodiment, the upper and lower sides of the third sound-absorbing block are provided with matching perforated metal plates, the openings on the outer walls of the perforated metal plates on the upper surface of the third sound-absorbing block are connected to the openings of the bent expansion pipe container, and the left and right sides of the third sound-absorbing block are provided with folded plate keels.

[0007] In a preferred embodiment, the folding keel is fixed to the perforated metal plate by rivets, and the folding keel is fixed to the outer shell.

[0008] In a preferred embodiment, the louver assembly composed of the perforated metal plate and the folding plate keel is shaped as “V”, “W”, “U”, “Z”, “S” or “H”.

[0009] In a preferred embodiment, a portion of the bent expansion pipe container is an elongated cavity, and the other portion is an expansion cavity. The open end of the elongated cavity portion of the bent expansion pipe container is fixed to the opening of the perforated metal plate, and the end of the expansion cavity portion is closed.

[0010] In a preferred embodiment, the outer wall of the housing is provided with a flange, and a rubber gasket is provided on one side of the flange.

[0011] In a preferred embodiment, the outer wall of the flange is provided with a plurality of threaded holes evenly distributed, and the outer wall of the rubber gasket is provided with through holes at positions corresponding to the threaded holes.

[0012] In a preferred embodiment, a first sound-absorbing block is provided on one side of the inner wall of the housing, and a second sound-absorbing block is provided on the other side.

[0013] In a preferred embodiment, the gap between the inner sides of the first and second sound-absorbing blocks and the nearest louver assembly serves as a ventilation opening.

[0014] In a preferred embodiment, the first sound-absorbing block, the second sound-absorbing block, and the third sound-absorbing block are all made of sound-absorbing material, such as melamine foam, sound-absorbing cotton, glass wool, or aramid cotton.

[0015] Compared with existing technologies, the silencer for noise control of server rack equipment provided by this utility model has the following advantages: The louver assembly adopts a design combining a perforated metal plate with a third sound-absorbing block and a bent expansion pipe container. The third sound-absorbing block is made of sound-absorbing material to reduce noise, and the bent expansion pipe container absorbs sound waves. The sound waves flow into the closed expansion cavity through the internal slender cavity and undergo periodic vibration. It has the functions of noise reduction, sound absorption, vibration isolation, and air circulation, which can meet the noise reduction and ventilation needs of the server rack ventilation opening. It can effectively reduce the noise pollution caused by the server rack equipment to the external environment, and has the advantages of simple structure, easy assembly, and good wide-frequency sound absorption effect. At the same time, by using a perforated metal plate to cover and fix the third sound-absorbing block, the problem of decreased stability of the sound absorption structure caused by external factors such as vibration can be avoided, thereby ensuring the stability of sound absorption performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front sectional view of the present invention;

[0017] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0018] Figure 3 This is a three-dimensional cross-sectional view of the louver assembly in this utility model;

[0019] Figure 4 for Figure 3 Schematic diagram of the three-dimensional and front sectional view of the expansion pipe container with a central bend;

[0020] Figure 5 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 6 for Figure 5 A magnified structural diagram of point A in the middle.

[0022] In the diagram: 1. Outer shell; 11. Flange; 12. Threaded hole; 13. Rubber gasket; 14. Through hole; 15. First sound-absorbing block; 16. Second sound-absorbing block; 2. Louver assembly; 21. Third sound-absorbing block; 22. Perforated metal plate; 23. Folded plate keel; 24. Rivet; 25. Bending expansion pipe container; 3. Ventilation opening. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this description, those skilled in the art can make creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0025] This utility model discloses a silencer for noise control of cabinet equipment, which solves the technical problems in the prior art. The overall concept is as follows:

[0026] Example 1:

[0027] See Figures 1-6 A silencer for noise control of cabinet equipment includes a housing 1 and multiple louver components 2 equidistantly arranged inside the housing 1. The gap between each louver component 2 is a ventilation opening 3. Each louver component 2 includes a third sound-absorbing block 21. Multiple bent expansion pipe containers 25 are evenly arranged inside the third sound-absorbing block 21. The bending direction of the bent expansion pipe containers 25 is consistent with the ventilation direction of the ventilation opening 3, and the opening end extends to the upper surface of the third sound-absorbing block 21. The upper and lower sides of the third sound-absorbing block 21 are provided with matching metal perforated plates 22. The opening on the outer wall of the metal perforated plate 22 located on the upper surface of the third sound-absorbing block 21 is connected to the opening of the bent expansion pipe container 25. The left and right sides of the third sound-absorbing block 21 are provided with folding plate keels 23. A part of the bent expansion pipe container 25 is a slender cavity, and the other part is an expansion cavity. The opening end of the slender cavity part of the bent expansion pipe container 25 is fixed at the opening of the metal perforated plate 22, and the end of the expansion cavity part is closed.

[0028] The third sound-absorbing block 21 is used for noise reduction. The perforated metal plate 22 is used to support the third sound-absorbing block 21 and also serves to guide airflow, slow down gas flow, and filter dust. The bent expansion pipe container 25 can absorb sound waves. The sound waves pass through the slender neck inside the cavity and undergo periodic vibration inside the expansion cavity. The outer wall of the pipe plays a role in vibration isolation. The outer shell 1 is the frame part of the device, and the vent 3 is used for airflow. The thickness of the outer shell 1 is 1.2mm, the thickness of the perforated metal plate 22 is 0.6mm, the perforation rate is 25%, the hole diameter is 3mm, the stainless steel perforated plate 22 is V-shaped, the inner angle is 148°, the width of the vent 3 is 20mm, the thickness of the third sound-absorbing block 21 is 18.8mm, the inner diameter of the slender neck cavity of the bent expansion pipe container 25 is 3mm, the inner diameter of the abdominal expansion cavity is 5mm, the length of the bent expansion pipe container is ≥15mm, and the width is 13mm. The bent expansion pipe container can achieve airborne sound absorption and vibration isolation, and a broadband noise reduction effect.

[0029] In practice, the folding keel 23 and the perforated metal plate 22 are connected and fixed by rivets 24, and the folding keel 23 is fixed on the outer shell 1.

[0030] In practice, the shape of the louver assembly 2, which consists of the perforated metal plate 22 and the folding keel 23, can be “V”, “W”, “U”, “Z”, “S” or “H”.

[0031] In specific implementation, a flange 11 is provided on the outer wall of the outer casing 1, and a rubber pad 13 is provided on one side of the flange 11. The flange 11 is used to fix the device on the equipment, and the rubber pad 13 is used for shock absorption.

[0032] In practice, the outer wall of the flange 11 is provided with multiple threaded holes 12 evenly distributed, and the outer wall of the rubber gasket 13 is provided with through holes 14 at positions corresponding to the threaded holes 12. The threaded holes 12 and through holes 14 are used to install screws.

[0033] In specific implementation, a first sound-absorbing block 15 is provided on one side of the inner wall of the outer shell 1, and a second sound-absorbing block 16 is provided on the other side. The gap between the inner side of the first sound-absorbing block 15 and the second sound-absorbing block 16 and the nearest louver assembly 2 is a ventilation opening 3. The first sound-absorbing block 15, the second sound-absorbing block 16 and the third sound-absorbing block 21 are all made of sound-absorbing materials, such as melamine foam, sound-absorbing cotton, glass wool or aramid cotton.

[0034] Its detailed connection methods are well-known technologies in this field. The following mainly introduces the working principle and process, and the specific work is as follows:

[0035] When airflow enters the equipment through the vent 3, it is silenced by the first sound-absorbing block 15, the second sound-absorbing block 16, the third sound-absorbing block 21 and the perforated metal plate 22. The perforated metal plate 22 is used to support the third sound-absorbing block 21 and also plays the role of airflow guidance, slowing down gas flow rate and filtering dust.

[0036] The outer casing 1 forms the frame of the device and is fixed to the equipment via flange 11. Threaded holes 12 and through holes 14 are used for screw installation. Rubber pads 13 are used for vibration damping. A folded plate keel 23 and a perforated metal plate 22 form a cavity for housing the third sound-absorbing block 21. Rivets 24 are used to connect the folded plate keel 23 and the perforated metal plate 22. The cavity of the third sound-absorbing block 21 contains a bent expansion pipe container. One end of the slender neck of the bent expansion pipe container 25 is fixed to the opening in the perforated metal plate 22, while the other end is closed at the bottom of the expansion cavity. It can absorb sound waves. The sound waves pass through the slender neck inside the cavity and undergo periodic vibrations within the expansion cavity. The outer wall of the pipe acts as a vibration damper. This invention mainly targets noise reduction in the mid-to-high frequency range of 500-4000Hz, while also addressing noise reduction in the 31.5-500Hz frequency range, achieving wideband noise reduction.

[0037] The above description of the embodiments is provided to facilitate understanding and use of the present invention by those skilled in the art. It is obvious to those skilled in the art that various modifications can be made to the embodiments, and the general principles described herein can be applied to other embodiments without creative effort. Therefore, the present invention is not limited to the above embodiments. Any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A silencer for cabinet equipment noise control, comprising a shell (1), a plurality of louver assemblies (2) equidistantly arranged in the shell (1), and gaps between each of the louver assemblies (2) being air vents (3), characterized in that: the louver assembly (2) comprises a third sound-absorbing block (21), a plurality of bent expansion pipe containers (25) are uniformly arranged in the third sound-absorbing block (21), the bending direction of the bent expansion pipe container (25) is consistent with the air flow direction of the air vent (3), and the opening end extends to the upper surface of the third sound-absorbing block (21).

2. A silencer for cabinet equipment noise control according to claim 1, characterized in that: The upper and lower sides of the third sound-absorbing block (21) are provided with matched metal perforated plates (22), the outer wall openings of the metal perforated plate (22) on the upper surface of the third sound-absorbing block (21) are in communication with the openings of the bent expansion pipe containers (25), and the left and right sides of the third sound-absorbing block (21) are provided with folded plate keels (23).

3. A silencer for cabinet equipment noise control according to claim 2, characterized in that: The folded plate keel (23) and the metal perforated plate (22) are connected and fixed by rivets (24), and the folded plate keel (23) is fixed on the shell (1).

4. A silencer for cabinet equipment noise control according to claim 3, characterized in that: The louver assembly (2) composed of the metal perforated plate (22) and the folded plate keel (23) is in the shape of "V", "W", "U", "Z", "S" or "H".

5. A silencer for cabinet equipment noise control according to claim 4, characterized in that: Part of the bent expansion pipe container (25) is an elongated cavity, and the other part is an expansion cavity, the opening end of the elongated cavity part of the bent expansion pipe container (25) is fixed at the opening of the metal perforated plate (22), and the end of the expansion cavity part is closed.

6. A sound suppressor for cabinet equipment noise control according to claim 5, characterized in that: The outer wall of the shell (1) is provided with a flange (11), one side of the flange (11) is provided with a rubber pad (13).

7. A sound suppressor for cabinet equipment noise control according to claim 6, characterized in that: A plurality of threaded holes (12) are uniformly formed in the outer wall of the flange (11), and a through hole (14) is formed in the outer wall of the rubber pad (13) corresponding to the threaded hole (12).

8. A sound suppressor for cabinet equipment noise control according to claim 7, characterized in that: One side of the inner wall of the shell (1) is provided with a first sound-absorbing block (15), and the other side is provided with a second sound-absorbing block (16).

9. A sound suppressor for cabinet equipment noise control according to claim 8, characterized in that: The inner side of the first sound-absorbing block (15) and the second sound-absorbing block (16) and the gap between the nearest louver assembly (2) are air vents (3).

10. A sound suppressor for cabinet equipment noise control according to claim 9, characterized in that: The first sound-absorbing block (15), the second sound-absorbing block (16) and the third sound-absorbing block (21) are all made of sound-absorbing material, and the sound-absorbing material is melamine plastic foam, sound-absorbing cotton, glass wool or aramid cotton.

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