Ventilation sound insulation board

Abstract

The utility model discloses a ventilation sound insulation board which comprises a main body, the main body is of a square hollow structure defined by a first layer board, a second layer board and a side board, an air inlet hole is formed in the first layer board, and an air outlet hole opposite to the air inlet hole is formed in the second layer board; the low-frequency noise elimination assembly comprises an air inlet pipe and an air outlet pipe, one end of the air inlet pipe is perpendicular to the first layer plate and fixed to the air inlet hole, and the other end of the air inlet pipe is located in the main body; one end of the air outlet pipe is perpendicular to the second layer plate and fixed to the air outlet hole, the other end of the air outlet pipe is located in the main body, the pipe diameter of the other end of the air outlet pipe is larger than that of the air inlet pipe, the air outlet pipe is sleeved on the outer surface of the other end of the air inlet pipe, and a resonant cavity is formed between the air outlet pipe and the air inlet pipe for low-frequency noise elimination. According to the ventilation sound insulation board, the ventilation effect can be improved while the sound insulation effect is guaranteed, the structure is simple, and the low-frequency effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sound insulation boards, and more particularly to a ventilation sound insulation board. Background Art

[0002] Taking into account both ventilation and sound insulation performance is one of the key points in noise control research. In particular, for noise equipment that requires natural ventilation and heat dissipation, the use of structures with good ventilation and sound insulation performance to implement noise reduction treatment can greatly reduce the noise reduction space and cost of noise equipment and promote the prevention and control of noise pollution.

[0003] However, existing ventilated sound insulation panels often reduce their aperture ratio to improve sound insulation performance, especially at low frequencies. While this improves sound insulation to a certain extent, it significantly reduces ventilation efficiency, even leading to poor ventilation and failing to meet the ventilation requirements of practical applications. Furthermore, due to the limitations of the anechoic volume, existing ventilated sound insulation panels often struggle to achieve an ideal balance between low-frequency performance and anechoic bandwidth. Too small an anechoic volume results in poor low-frequency performance, impacting sound insulation performance; while increasing the anechoic volume results in a bulky structure, increasing costs, and complicating installation and maintenance.

[0004] Therefore, how to provide a ventilation sound insulation board that can improve the ventilation effect while ensuring the sound insulation effect, has a simple structure and can improve the low-frequency effect is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, the utility model provides a ventilation sound insulation board, which can improve the ventilation effect while ensuring the sound insulation effect, has a simple structure and can improve the low-frequency effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A ventilation and sound insulation panel, comprising:

[0008] The main body is a square hollow structure formed by the first layer, the second layer and the side panels. The first layer is provided with an air inlet, and the second layer is provided with an air outlet arranged opposite to the air inlet.

[0009] A low-frequency silencer component includes an air inlet pipe and an air outlet pipe. One end of the air inlet pipe is arranged perpendicular to the first layer and fixed at the air inlet hole, and the other end is located inside the main body; one end of the air outlet pipe is arranged perpendicular to the second layer and fixed at the air outlet hole, and the other end is located inside the main body. The diameter of the other end of the air outlet pipe is larger than the diameter of the air inlet pipe. It is sleeved on the outer surface of the other end of the air inlet pipe and a resonance cavity is formed between it and the air inlet pipe to achieve low-frequency silence.

[0010] Through the above technical solution, the present invention provides a ventilated sound insulation panel, which can ensure smooth passage of airflow through the provision of air inlet and air outlet holes. The design of the resonance cavity achieves effective absorption and attenuation of low-frequency sound waves, thereby improving the sound insulation effect of the ventilated sound insulation panel in the low-frequency band. In addition, the air inlet and air outlet ducts do not block the airflow path, avoiding the problem of poor ventilation caused by excessive pursuit of sound insulation effect, thereby ensuring both sound insulation and ventilation effect. Compared with the existing method of improving low-frequency sound insulation performance by increasing the sound insulation volume, the ventilated sound insulation panel disclosed by the utility model has a simple structure, avoiding the problems of bulky structure, increased cost, and inconvenient installation and maintenance.

[0011] Preferably, the system further includes a unit partition. The unit partition is located within the main body, with its ends perpendicularly fixed to the first and second panels, dividing the main body into multiple groups of sound-absorbing units. Each group of sound-absorbing units has corresponding air inlet and outlet holes on the first and second panels. This structure increases the opening ratio of the ventilation sound insulation panel, improving its ventilation and sound insulation effects. Furthermore, the unit partition serves as structural support within the main body, enhancing the strength and stability of the entire ventilation sound insulation panel.

[0012] Furthermore, the multiple groups of noise reduction units are rectangular structures with the same size and are evenly arranged.

[0013] Furthermore, the unit partition is composed of a plurality of transverse partitions and a plurality of longitudinal partitions that are arranged at intervals and vertically cross each other, and both ends of the transverse partitions and the longitudinal partitions are correspondingly and vertically fixedly connected to the first layer and the second layer.

[0014] Preferably, a partition plate is further included, which is fixed vertically to the unit partition plate and divides the muffler unit into a low-frequency muffler zone and a broadband muffler zone. The partition plate is provided with ventilation holes arranged opposite to the air inlet hole. The other end of the air inlet pipe is located in the low-frequency muffler zone, and the other end of the air outlet pipe passes through the ventilation hole and is located in the low-frequency muffler zone and is sleeved on the outer surface of the other end of the air inlet pipe, forming a resonance cavity between the air inlet pipe and the air inlet pipe. The arrangement of the low-frequency muffler zone and the broadband muffler zone enables sound waves of different frequency bands to be muffled in the most suitable area. The low-frequency muffler zone achieves a noise reduction effect on low-frequency noise through a resonant muffler structure, and the broadband muffler zone achieves a good noise reduction effect on medium and high frequencies, avoiding the complexity and inefficiency of processing multiple frequency sound waves in a single area. This targeted partitioning treatment method improves the overall sound insulation efficiency, allowing the ventilation sound insulation board to more effectively isolate noise while maintaining ventilation efficiency.

[0015] The cavity formed between the outer wall of the resonance cavity, part of the wall of the air inlet pipe and the inner wall of the low-frequency anechoic zone and the resonance cavity together form a Helmholtz resonance sound absorption structure, which greatly improves the low-frequency anechoic ability.

[0016] Furthermore, the air outlet pipe includes a first section pipe and a second section pipe, the diameter of the first section pipe is the same as the aperture of the air outlet hole, it is located in the broadband sound elimination zone and its two ends are respectively fixed vertically at the air outlet hole and the ventilation hole; the diameter of the first section pipe is the same as the aperture of the air inlet hole, the diameter of the second section pipe is larger than the diameter of the first section pipe and it is located in the low-frequency sound elimination zone, one end of the second section pipe is integrally connected to one end of the first section pipe, and the other end is sleeved on the other end of the air inlet pipe and forms a resonance cavity between the second section pipe and the air inlet pipe.

[0017] Furthermore, the air inlet, air outlet and ventilation holes have the same aperture.

[0018] The ratio of the hole area of the corresponding air inlet hole in the muffler unit to the area of the first layer plate corresponding to the muffler unit reaches more than 15%.

[0019] The diameters of the air inlet, outlet and ventilation holes shall not be less than 10mm.

[0020] Furthermore, the spacing between the second section of the tube and the air inlet tube is 1-3 mm, and the length L of the overlapping portion between the second section of the tube and the air inlet tube is not less than 10 mm.

[0021] By adjusting the distance between the air inlet pipe and the second section of the pipe and the length L of the overlapping part, the low-frequency sound insulation frequency can be designed specifically to achieve better low-frequency sound insulation effect.

[0022] Preferably, a plurality of sound-absorbing holes are evenly opened on the wall of the first section of the tube, and a resistive sound-absorbing member is filled in the cavity formed between the inner wall of the broadband anechoic zone and the outer wall of the first section of the tube.

[0023] Furthermore, the diameter of the sound absorbing holes is 1-2 mm.

[0024] Furthermore, the perforation rate of the tube wall of the first section of the tube is not less than 20%.

[0025] Furthermore, the resistive sound absorbing member is made of resistive sound absorbing materials such as fibrous sound absorbing materials and sponge sound absorbing materials.

[0026] The broadband anechoic zone improves the anechoic ability of mid- and high-frequency sounds by setting resistive sound-absorbing parts and sound-absorbing holes.

[0027] By adjusting the thickness of the broadband anechoic zone (the distance between the partition plate and the second layer of the plate) and the parameters of the perforated portion of the first section of the tube, the effective sound insulation frequency band can be controlled within the range of 1000-5000 Hz, or a wider sound insulation frequency band.

[0028] Preferably, the first layer plate, the second layer plate, the side plates, the partition plates and the unit partition plates are all metal thin plates, and the thickness is 1-2 mm.

[0029] The wall thickness of the air inlet pipe, the first section pipe and the second section pipe are all about 1mm.

[0030] Through the above technical solutions, it can be seen that compared with the prior art, the present invention discloses a ventilation sound insulation board. Compared with the prior art, the present invention can ensure the smooth passage of airflow through the arrangement of the air inlet and air outlet holes; the design of the resonance cavity realizes the effective absorption and attenuation of low-frequency sound waves, thereby improving the sound insulation effect of the ventilation sound insulation board in the low-frequency band; and the air inlet and air outlet ducts do not block the air flow path, thereby avoiding the problem of poor ventilation caused by excessive pursuit of sound insulation effect, and ensuring the ventilation effect while ensuring the sound insulation effect; compared with the existing method of improving the low-frequency sound insulation performance by increasing the sound insulation volume, the ventilation sound insulation board disclosed by the present invention has a better sound insulation performance. The sound panel has a simple structure, avoiding the problems of bulky structure, rising costs, and inconvenient installation and maintenance. The arrangement of low-frequency anechoic zones and broadband anechoic zones enables sound waves of different frequency bands to be anechoiced in the most suitable areas. The low-frequency anechoic zone achieves a noise reduction effect on low-frequency noise through the resonance anechoic structure, while the broadband anechoic zone achieves a good noise reduction effect on medium and high frequencies through the arrangement of resistive sound-absorbing parts and sound-absorbing holes, avoiding the complexity and inefficiency of processing multiple frequency sound waves in a single area. This targeted treatment method of zoning improves the overall sound insulation efficiency, allowing the ventilation sound insulation panel to more effectively isolate noise while maintaining ventilation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] Figure 1 The utility model is a structural schematic diagram of a ventilation sound insulation board.

[0033] Figure 2 for Figure 1 sectional view of .

[0034] Figure 3 A structural schematic diagram of a unit partition provided by the utility model.

[0035] Figure 4 A structural schematic diagram of a noise reduction unit provided by the utility model.

[0036] Figure 5 This is a noise reduction effect diagram of a ventilation sound insulation board of the utility model with a ventilation area accounting for 19%.

[0037] Among them, 1 is the main body; 11 is the first layer; 12 is the air inlet; 13 is the second layer; 14 is the air outlet; 15 is the side panel;

[0038] 2 is a low-frequency muffler assembly; 21 is an air inlet pipe; 22 is an air outlet pipe; 221 is a first section of the pipe; 2211 is a sound absorption hole; 222 is a second section of the pipe; 23 is a resonance cavity;

[0039] 3 is a partition plate; 31 is a ventilation hole;

[0040] 4 is a unit partition;

[0041] 5 is a muffler unit; 51 is a low-frequency muffler area; 52 is a broadband muffler area;

[0042] 6 is a resistive sound absorbing component. DETAILED DESCRIPTION

[0043] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] See attached Figure 1-4 The present invention discloses a ventilation and sound insulation board, comprising:

[0045] The main body 1 is a square hollow structure formed by a first layer 11, a second layer 13 and side panels 15. The first layer 11 is provided with an air inlet 12, and the second layer 13 is provided with an air outlet 14 arranged opposite to the air inlet 12.

[0046] The low-frequency silencer component 2 includes an air inlet pipe 21 and an air outlet pipe 22. One end of the air inlet pipe 21 is arranged perpendicular to the first layer plate 11 and fixed at the air inlet hole 12, and the other end is located inside the main body 1; one end of the air outlet pipe 22 is arranged perpendicular to the second layer plate 13 and fixed at the air outlet hole 14, and the other end is located inside the main body 1. The diameter of the other end of the air outlet pipe 22 is larger than the diameter of the air inlet pipe 21. It is sleeved on the outer surface of the other end of the air inlet pipe 21 and a resonance cavity 23 is formed between it and the air inlet pipe 21 for low-frequency silence.

[0047] In some specific implementation examples, a unit partition 4 is also included. The unit partition 4 is located inside the main body 1, and its two ends are respectively vertically fixed to the first layer plate 11 and the second layer plate 13 and divide the interior of the main body 1 into multiple groups of silencer units 5. The first layer plate 11 and the second layer plate 13 corresponding to each group of silencer units 5 are respectively provided with an air inlet hole 12 and an air outlet hole 14.

[0048] Specifically, the multiple groups of noise reduction units 5 are all rectangular structures with the same size and are evenly arranged.

[0049] The unit partition 4 is composed of a plurality of transverse partitions and a plurality of longitudinal partitions that are arranged at intervals and vertically cross each other. Both ends of the transverse partitions and the longitudinal partitions are correspondingly and vertically fixedly connected to the first layer plate 11 and the second layer plate 13 .

[0050] In other specific implementation examples, a partition plate 3 is further included, which is fixed vertically to the unit partition plate 4 and divides the muffler unit 5 into a low-frequency muffler zone 51 and a broadband muffler zone 52. The partition plate 3 is provided with a ventilation hole 31 arranged opposite the air inlet hole 12. The other end of the air inlet pipe 21 is located in the low-frequency muffler zone 51, and the other end of the air outlet pipe 22 passes through the ventilation hole 31 and is located in the low-frequency muffler zone 51. The other end is sleeved on the outer surface of the other end of the air inlet pipe 21 and forms a resonance cavity 23 between the air inlet pipe 21. The cavity formed between the outer wall of the resonance cavity 23, part of the pipe wall of the air inlet pipe 21, and the inner wall of the low-frequency muffler zone 51, together with the resonance cavity 23, forms a Helmholtz resonance sound absorption structure, which greatly improves the low-frequency sound absorption capability.

[0051] Specifically, the air inlet 12 , the air outlet 14 , and the ventilation hole 31 have the same aperture.

[0052] The area ratio of the corresponding air inlet hole 12 in the muffler unit 5 to the area ratio of the first layer plate 11 corresponding to the muffler unit 5 is more than 15%. Figure 5 , Figure 5 This is a noise reduction effect diagram when the ratio of the hole area of the air inlet hole 12 corresponding to the silencer unit 5 to the area of the first layer plate 11 corresponding to the silencer unit 5 is 19%.

[0053] The diameters of the air inlet 12 , the air outlet 14 and the ventilation holes 31 are all no less than 10 mm.

[0054] In other specific implementation examples, the air outlet pipe 22 includes a first section pipe 221 and a second section pipe 222. The diameter of the first section pipe 221 is the same as the aperture of the air outlet hole 14. It is located in the broadband sound elimination zone 52 and its two ends are vertically fixed to the air outlet hole 14 and the ventilation hole 31 respectively; the diameter of the first section pipe 221 is the same as the aperture of the air inlet hole 12, the diameter of the second section pipe 222 is larger than the diameter of the first section pipe 221 and it is located in the low-frequency sound elimination zone 51, one end of the second section pipe 222 is integrally connected to one end of the first section pipe 221, and the other end is sleeved on the other end of the air inlet pipe 21 and forms a resonance cavity 23 between the second section pipe 222 and the air inlet pipe 21.

[0055] Specifically, the distance between the second section of the tube 222 and the air inlet tube 21 is 1-3 mm, and the length L of the overlapping portion between the second section of the tube 222 and the air inlet tube 21 is not less than 10 mm.

[0056] A plurality of sound-absorbing holes 2211 are evenly formed on the wall of the first section of the tube 221 .

[0057] The diameter of the sound absorbing hole 2211 is 1-2 mm.

[0058] The perforation rate of the tube wall of the first section of the tube 221 is not less than 20%.

[0059] In some other specific implementation examples, the cavity formed between the inner wall of the broadband silencing zone 52 and the outer wall of the first section of the tube 221 is filled with a resistive sound absorbing member 6 .

[0060] Specifically, the resistive sound absorbing member 6 is made of a resistive sound absorbing material such as a fibrous sound absorbing material or a sponge sound absorbing material.

[0061] Specifically, the first layer plate 11 , the second layer plate 13 , the side plate 15 , the partition plate 3 and the unit partition plate 4 are all metal thin plates, and the thickness is 1-2 mm.

[0062] The wall thickness of the air inlet pipe 21 , the first section pipe 221 and the second section pipe 222 are all about 1 mm.

[0063] The ventilation sound insulation board designed according to the utility model can ensure smooth passage of airflow through the arrangement of air inlet and air outlet holes; the design of the resonance cavity realizes effective absorption and attenuation of low-frequency sound waves, thereby improving the sound insulation effect of the ventilation sound insulation board in the low-frequency band; and the air inlet and air outlet ducts do not block the air flow path, thereby avoiding the problem of poor ventilation caused by excessive pursuit of sound insulation effect, and ensuring the ventilation effect while ensuring the sound insulation effect; compared with the existing method of improving low-frequency sound insulation performance by increasing the sound insulation volume, the ventilation sound insulation board disclosed by the utility model has a simple structure, avoids the structure being bulky and costly The problem of rising noise and inconvenience in installation and maintenance is solved; through the setting of low-frequency anechoic zone and broadband anechoic zone, sound waves of different frequency bands can be anechoiced in the most suitable area. The low-frequency anechoic zone achieves the noise reduction effect of low-frequency noise through the resonance anechoic structure, and the broadband anechoic zone achieves good noise reduction effect of medium and high frequencies through the setting of resistive sound absorbing parts and sound absorbing holes, avoiding the complexity and inefficiency of processing multiple frequency sound waves in a single area. This targeted treatment method of zoning improves the overall sound insulation efficiency, so that the ventilation sound insulation board can more effectively isolate noise while maintaining ventilation efficiency.

[0064] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0065] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ventilation sound insulation board, characterized in that: include: A main body (1), the main body (1) being a square hollow structure formed by a first layer (11), a second layer (13) and a side plate (15); an air inlet (12) being provided on the first layer (11); and an air outlet (14) being provided on the second layer (13) and being arranged opposite to the air inlet (12); A low-frequency silencer assembly (2), comprising an air inlet pipe (21) and an air outlet pipe (22), wherein one end of the air inlet pipe (21) is arranged perpendicularly to the first layer plate (11) and fixed at the air inlet hole (12), and the other end is located inside the main body (1); one end of the air outlet pipe (22) is arranged perpendicularly to the second layer plate (13) and fixed at the air outlet hole (14), and the other end is located inside the main body (1); the diameter of the other end of the air outlet pipe (22) is larger than the diameter of the air inlet pipe (21), and the air outlet pipe (22) is sleeved on the outer surface of the other end of the air inlet pipe (21) and forms a resonance cavity (23) between the air outlet pipe (22) and the air inlet pipe (21) for low-frequency silence.

2. The ventilation and sound insulation board according to claim 1, characterized in that: The invention also includes a unit partition (4), wherein the unit partition (4) is located inside the main body (1), and the two ends of the unit partition (4) are respectively fixed vertically to the first layer plate (11) and the second layer plate (13) and divide the interior of the main body (1) into multiple groups of silencer units (5), and the first layer plate (11) and the second layer plate (13) corresponding to each group of the silencer units (5) are respectively provided with the air inlet (12) and the air outlet (14).

3. The ventilation and sound insulation board according to claim 2, characterized in that: The invention also includes a partition plate (3), wherein the partition plate (3) is vertically fixed to the unit partition plate (4) and divides the muffler unit (5) into a low-frequency muffler zone (51) and a broadband muffler zone (52); the partition plate (3) is provided with a ventilation hole (31) arranged opposite to the air inlet hole (12); the other end of the air inlet pipe (21) is located in the low-frequency muffler zone (51); the other end of the air outlet pipe (22) passes through the ventilation hole (31) and is located in the low-frequency muffler zone (51) and is sleeved on the outer surface of the other end of the air inlet pipe (21) and forms the resonance cavity (23) between the air inlet pipe (21) and the air outlet pipe (22).

4. The ventilation and sound insulation board according to claim 3, characterized in that: The air inlet (12), the air outlet (14) and the ventilation hole (31) have the same aperture and are not less than 10 mm.

5. The ventilation and sound insulation board according to claim 4, characterized in that: The air outlet pipe (22) comprises a first section pipe (221) and a second section pipe (222); the diameter of the first section pipe (221) is the same as the aperture of the air outlet hole (14); the first section pipe (221) is located in the broadband silencing zone (52) and its two ends are respectively vertically fixed to the air outlet hole (14) and the ventilation hole (31); the diameter of the first section pipe (221) is the same as the aperture of the air inlet hole (12); the diameter of the second section pipe (222) is larger than the diameter of the first section pipe (221) and is located in the low-frequency silencing zone (51); one end of the second section pipe (222) is integrally connected to one end of the first section pipe (221); the other end of the second section pipe (222) is sleeved on the other end of the air inlet pipe (21) and forms the resonance cavity (23) between the second section pipe (222) and the air inlet pipe (21).

6. The ventilation and sound insulation board according to claim 5, characterized in that: The distance between the second section of the tube (222) and the air inlet tube (21) is 1-3 mm, and the length L of the overlapping portion between the second section of the tube (222) and the air inlet tube (21) is not less than 10 mm.

7. The ventilation and sound insulation board according to claim 5, characterized in that: A plurality of sound-absorbing holes (2211) are evenly arranged on the wall of the first section of the tube (221).

8. The ventilation and sound insulation board according to claim 7, characterized in that: The aperture of the sound absorbing hole (2211) is 1-2 mm.

9. The ventilation and sound insulation board according to claim 7, characterized in that: The perforation rate of the tube wall of the first section of tube (221) is not less than 20%.

10. The ventilation and sound insulation board according to claim 7, characterized in that: The cavity formed between the inner wall of the broadband sound-absorbing zone (52) and the outer wall of the first section of the tube (221) is filled with a resistive sound-absorbing component (6).

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