A new fan duct sound attenuation structure

Abstract

The utility model discloses a kind of sound-absorbing structures for fresh air machine pipeline, including conveying component, the conveying component includes conveying pipeline and sound-absorbing wave plate, and the inside of conveying pipeline is installed with sound-absorbing wave plate, the outside of conveying component is installed with outer package sound-absorbing component, and the outside of outer package sound-absorbing component is installed with mounting assembly, one end of outer package sound-absorbing component is installed with auxiliary air outlet component, and the inside of auxiliary air outlet component is installed with main air outlet component, auxiliary sound-absorbing component is installed on the main air outlet component, the outer package sound-absorbing component includes honeycomb layer and outer protective shell, and the outside of honeycomb layer is provided with outer protective shell;The equipment is through the synergic effect of sound-absorbing wave plate and auxiliary sound-absorbing component, effectively controls and effectively offsets the impact of air flow rate, reaches the double effect of reducing vibration and reducing noise, and the equipment also carries out vibration elimination structure to junction, thereby reducing the noise generated by vibration to junction.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology for fresh air ducts, specifically a noise reduction structure for fresh air ducts. Background Technology

[0002] A noise-reducing structure for fresh air ducts is a device specifically designed to reduce the noise generated by fresh air units in ventilation systems. This structure can significantly improve indoor and outdoor noise levels, providing users with a quieter and more comfortable living and working environment. It also helps reduce noise pollution and protect public health. Therefore, this structure is widely used in modern building and industrial ventilation systems.

[0003] The common practice for existing fresh air system ducts to employ a sound-absorbing structure involves wrapping the outside of the duct with a layer of sound-absorbing material. The main purpose of this design is to effectively absorb noise generated inside the duct during operation, thus preventing noise from spreading outwards and achieving the desired noise reduction effect. However, in practical applications, this noise reduction method can only alleviate noise and cannot completely solve the problem. This is because noise generated by vibrations during duct operation can still be transmitted through the duct's installation and connection points, inevitably leading to some noise leakage. Therefore, despite the noise reduction measures, the equipment still causes some noise pollution during operation, failing to completely eliminate the noise impact on the surrounding environment. Utility Model Content

[0004] The purpose of this invention is to provide a noise reduction structure for fresh air ducts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a conveying assembly comprising a conveying pipe and a sound-absorbing corrugated plate, wherein the sound-absorbing corrugated plate is installed inside the conveying pipe, an outer wrapping sound-absorbing assembly is installed outside the conveying assembly, and an installation assembly is installed outside the outer wrapping sound-absorbing assembly, an auxiliary air outlet assembly is installed at one end of the outer wrapping sound-absorbing assembly, and a main air outlet assembly is installed inside the auxiliary air outlet assembly, and an auxiliary sound-absorbing assembly is installed on the main air outlet assembly.

[0006] Preferably, the outer casing sound-absorbing component includes a honeycomb layer and an outer protective shell, and the outer protective shell is provided on the outside of the honeycomb layer; By adopting the above technical solution, the equipment can be wrapped to reduce the transmission of noise to the outside.

[0007] Preferably, the mounting assembly includes an outer mounting sleeve, a first rubber support member, and a first inner mounting sleeve, wherein the first rubber support member is provided on one side of the inner side of the outer mounting sleeve, and the end of the first rubber support member away from the outer mounting sleeve is connected to the first inner mounting sleeve. By adopting the above technical solution, it is possible to install the external sound-absorbing components.

[0008] Preferably, the outer mounting sleeve further includes a second rubber support and a second inner mounting sleeve, and the second rubber support is installed on the other side of the inner side of the outer mounting sleeve, and the second inner mounting sleeve is installed on the end of the second rubber support away from the outer mounting sleeve; By adopting the above technical solution, the auxiliary air outlet component can be installed.

[0009] Preferably, the auxiliary air outlet assembly includes a pressure distribution box and a pressure distribution pipe, and the pressure distribution box is equipped with pressure distribution pipes around its perimeter; By adopting the above technical solution, rapid pressure relief protection can be provided when the air pressure inside the equipment reaches a certain level.

[0010] Preferably, the main air outlet assembly includes a piston plate and an air outlet pipe, and the air outlet pipe is installed on one side of the piston plate; By adopting the above technical solution, the air inside the equipment can be guided to the required location for discharge.

[0011] Preferably, the auxiliary noise reduction assembly includes a honeycomb pad and a spring, with the honeycomb pad installed on the other side of the piston plate and the spring installed on the outside of the air outlet pipe; By adopting the above technical solution, the impact of air can be buffered, and the vibration generated by the impact can be prevented from causing noise.

[0012] Compared with the prior art, the advantages of this application are: the device achieves effective control of airflow speed and effective cancellation of impact force through the synergistic effect of the sound-absorbing wave plate and auxiliary sound-absorbing components, thus achieving the dual effect of reducing vibration and noise. The device also incorporates a vibration elimination structure at the connection point, thereby reducing the noise generated at the connection point by vibration.

[0013] This invention utilizes a specially designed sound-absorbing corrugated plate to effectively slow down the airflow. This design cleverly leverages the special structure of the corrugated plate to effectively reduce the velocity of high-speed airflow as it passes over it. This significantly reduces the strong impact on the conveying pipeline caused by high-speed airflow, thereby fundamentally reducing pipeline vibration caused by such impact. By slowing down the airflow in this way, noise generation can be greatly reduced at the source.

[0014] This utility model is also equipped with an auxiliary noise reduction component, which is specially designed to cope with the impact force generated when the air flows at high speed. The auxiliary noise reduction component can effectively counteract these impact forces and further reduce the vibration effect of the conveying pipeline under the influence of high-speed air flow. Through this dual vibration reduction design, not only can the amplitude of pipeline vibration be significantly reduced, but also the generation of noise can be effectively reduced, thereby providing users with a quieter and more comfortable working or living environment.

[0015] This utility model connects to the equipment via a second inner mounting sleeve and a first inner mounting sleeve. Then, the first inner mounting sleeve and the second inner mounting sleeve are connected to the outer mounting sleeve via a first rubber support and a second rubber support, respectively. The rubber material of the first rubber support and the second rubber support enables the equipment to absorb vibration during vibration, thereby reducing noise generated at the connection point due to vibration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a sound-absorbing structure for a fresh air duct according to the present invention; Figure 2 This is a schematic cross-sectional view of a sound-absorbing structure for a fresh air unit duct according to the present invention. Figure 1 ; Figure 3 This is a schematic cross-sectional view of a sound-absorbing structure for a fresh air unit duct according to the present invention. Figure 2 ; Figure 4 This is an enlarged structural schematic diagram of a sound-absorbing structure installation component for a fresh air duct of this utility model.

[0017] In the diagram: 1. Conveying assembly; 101. Conveying pipe; 102. Noise-absorbing corrugated plate; 2. Outer noise-absorbing assembly; 201. Honeycomb layer; 202. Outer protective shell; 3. Mounting assembly; 301. Outer mounting sleeve; 302. First rubber support; 303. First inner mounting sleeve; 304. Second rubber support; 305. Second inner mounting sleeve; 4. Auxiliary air outlet assembly; 401. Pressure distribution box; 402. Pressure distribution pipe; 5. Main air outlet assembly; 501. Piston plate; 502. Air outlet pipe; 6. Auxiliary noise-absorbing assembly; 601. Honeycomb pad; 602. Spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 The present invention provides a technical solution: including a conveying component 1, the conveying component 1 including a conveying pipe 101 and a sound-absorbing corrugated plate 102, and the sound-absorbing corrugated plate 102 is installed inside the conveying pipe 101. An outer wrapping sound-absorbing component 2 is installed outside the conveying component 1, and an installation component 3 is installed outside the outer wrapping sound-absorbing component 2. An auxiliary air outlet component 4 is installed at one end of the outer wrapping sound-absorbing component 2, and a main air outlet component 5 is installed inside the auxiliary air outlet component 4. An auxiliary sound-absorbing component 6 is installed on the main air outlet component 5. By employing a specially designed sound-absorbing corrugated plate 102, the airflow velocity can be significantly reduced. This design cleverly utilizes the special structure of the corrugated plate, which effectively reduces the velocity of high-speed airflow when passing through it. This significantly reduces the strong impact on the conveying pipe 101 caused by high-speed airflow, thereby fundamentally reducing the pipe vibration caused by this impact. By reducing the airflow velocity in this way, noise generation can be greatly reduced at the source.

[0020] The outer casing noise reduction component 2 includes a honeycomb layer 201 and an outer protective shell 202, and the outer protective shell 202 is provided on the outside of the honeycomb layer 201; The outer protective shell 202 is wrapped with a honeycomb layer 201. The honeycomb layer 201 can reduce the transmission of vibration to the outside, and at the same time, it can also absorb sound, thereby reducing the noise generated inside the equipment.

[0021] Mounting assembly 3 includes an outer mounting sleeve 301, a first rubber support 302, and a first inner mounting sleeve 303. The first rubber support 302 is provided on one side of the inner side of the outer mounting sleeve 301. The first inner mounting sleeve 303 is connected to one end of the first rubber support 302 away from the outer mounting sleeve 301. The outer mounting sleeve 301 also includes a second rubber support 304 and a second inner mounting sleeve 305. The second rubber support 304 is installed on the other side of the inner side of the outer mounting sleeve 301. The second inner mounting sleeve 305 is installed on one end of the second rubber support 304 away from the outer mounting sleeve 301. The device is connected to the second inner mounting sleeve 305 and the first inner mounting sleeve 303. Then, the first inner mounting sleeve 303 and the second inner mounting sleeve 305 are connected to the outer mounting sleeve 301 through the first rubber support 302 and the second rubber support 304 respectively. The rubber material of the first rubber support 302 and the second rubber support 304 enables the device to absorb vibration force during vibration, thereby reducing the noise generated by vibration at the connection.

[0022] The auxiliary air outlet assembly 4 includes a pressure distribution box 401 and a pressure distribution pipe 402, and the pressure distribution box 401 is surrounded by the pressure distribution pipe 402. By increasing the space of the pressure divider box 401, the speed of the incoming air is slowed down, reducing the vibration caused by airflow. When the air pressure inside the pressure divider box 401 is too high, the pressure divider pipe 402 will assist in the exhaust of air. This can prevent the airflow speed from increasing to a certain extent, which would cause a sharp increase in noise.

[0023] The main air outlet assembly 5 includes a piston plate 501 and an air outlet pipe 502, and the air outlet pipe 502 is installed on one side of the piston plate 501. Relying on the elastic structure formed between the piston plate 501 and the pressure dividing box 401 through the spring 602, when the exhaust speed of the exhaust pipe 502 cannot keep up, the piston plate 501 can be moved backward by the air pressure, increasing the internal space of the pressure dividing box 401, thereby reducing the air pressure and the air flow speed. At the same time, the honeycomb soft pad 601 can reduce the noise of the air impact. When the air enters the pressure dividing box 401, it will directly hit the honeycomb soft pad 601. The soft structure of the honeycomb soft pad 601 can avoid vibration during the impact, and the honeycomb can also guide the air flow and reduce the impact force. Equipped with an auxiliary noise reduction component 6, which is specifically designed to counteract the impact force generated when air flows at high speed, the auxiliary noise reduction component 6 can effectively offset these impact forces and further reduce the vibration effect of the conveying pipe 101 under the influence of high-speed air flow. Through this dual vibration reduction design, not only can the amplitude of pipe vibration be significantly reduced, but also the generation of noise can be effectively reduced, thereby providing users with a quieter and more comfortable working or living environment.

[0024] The implementation principle of this application is as follows: First, the conveying pipe 101 is connected to the fresh air fan. Here, a flexible hose is directly installed between the air outlet of the fresh air fan and the conveying pipe 101 to avoid vibration transmission caused by direct connection. During operation, the equipment is slowed down by the sound-absorbing corrugated plate 102, thereby reducing noise. If the conveying pipe 101 is designed to be long, the sound-absorbing corrugated plate 102 can be installed intermittently to slow down the speed. The equipment is installed by the mounting component 3, and the sound-absorbing component 2 is used to prevent the noise generated inside from being transmitted to the outside. When the air enters the auxiliary air outlet assembly 4, it will be buffered by the auxiliary silencer assembly 6 to reduce the vibration noise caused by the impact. If the air entering the auxiliary air outlet assembly 4 is greater than the air discharged from the main air outlet assembly 5, the piston plate 501 will be affected by the pressure and move backward, thereby exposing the pressure divider pipe 402 for auxiliary air discharge. This avoids the high-speed flow caused by all the air being discharged from the outlet pipe 502, which would cause vibration. The pressure divider pipe 402 and the outlet pipe 502 are designed as multi-pipes to guide the air to multiple directions and positions.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A noise-reducing structure for a fresh air unit duct, comprising a conveying assembly (1), characterized in that: The conveying assembly (1) includes a conveying pipe (101) and a sound-absorbing corrugated plate (102), and the sound-absorbing corrugated plate (102) is installed inside the conveying pipe (101). An outer wrapping sound-absorbing assembly (2) is installed outside the conveying assembly (1), and an installation assembly (3) is installed outside the outer wrapping sound-absorbing assembly (2). An auxiliary air outlet assembly (4) is installed at one end of the outer wrapping sound-absorbing assembly (2), and a main air outlet assembly (5) is installed inside the auxiliary air outlet assembly (4). An auxiliary sound-absorbing assembly (6) is installed on the main air outlet assembly (5).

2. The sound-absorbing structure for a fresh air unit duct according to claim 1, characterized in that: The outer casing noise reduction component (2) includes a honeycomb layer (201) and an outer protective shell (202), and the outer protective shell (202) is provided on the outside of the honeycomb layer (201).

3. The sound-absorbing structure for a fresh air unit duct according to claim 1, characterized in that: The mounting assembly (3) includes an outer mounting sleeve (301), a first rubber support (302) and a first inner mounting sleeve (303), and the first rubber support (302) is provided on one side of the inner side of the outer mounting sleeve (301), and the first inner mounting sleeve (303) is connected to the end of the first rubber support (302) away from the outer mounting sleeve (301).

4. The sound-absorbing structure for a fresh air unit duct according to claim 3, characterized in that: The outer mounting sleeve (301) also includes a second rubber support (304) and a second inner mounting sleeve (305), and the second rubber support (304) is installed on the other side of the interior of the outer mounting sleeve (301), and the second inner mounting sleeve (305) is installed on the end of the second rubber support (304) away from the outer mounting sleeve (301).

5. The sound-absorbing structure for a fresh air unit duct according to claim 1, characterized in that: The auxiliary air outlet assembly (4) includes a pressure distribution box (401) and a pressure distribution pipe (402), and the pressure distribution box (401) is surrounded by a pressure distribution pipe (402).

6. The sound-absorbing structure for a fresh air unit duct according to claim 1, characterized in that: The main air outlet assembly (5) includes a piston plate (501) and an air outlet pipe (502), and the air outlet pipe (502) is installed on one side of the piston plate (501).

7. A sound-absorbing structure for a fresh air unit duct according to claim 6, characterized in that: The auxiliary noise reduction assembly (6) includes a honeycomb pad (601) and a spring (602). The honeycomb pad (601) is installed on the other side of the piston plate (501), and the spring (602) is installed on the outside of the air outlet pipe (502).

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