Air supply unit, air suspension system and vehicle

Abstract

The utility model discloses an air supply unit, an air suspension system and a vehicle, and the air supply unit comprises an air pump and a first cavity and / or a second cavity. A first pipeline and a second pipeline are arranged on the air pump, the air pump is communicated with the air using device through the first pipeline, and the air pump is communicated with the atmosphere through the second pipeline. The first cavity communicates with the first pipeline, and the sectional area of the first cavity is larger than that of the first pipeline. The second cavity communicates with the second pipeline, and the sectional area of the second cavity is larger than that of the second pipeline. According to the application, the first pipeline is connected with the first cavity, and / or the second pipeline is connected with the second cavity, so that the reflection of sound waves and the reduction of the energy of the sound waves can be realized through the cavity with a relatively large volume in the gas transmission process, and the purpose of reducing noise is achieved.

Description

Technical Field

[0001] This application relates to the field of transportation technology, specifically to an air supply unit, an air suspension system, and a vehicle. Background Technology

[0002] With the development of new energy vehicles, air springs are increasingly being used in passenger cars. Air springs allow for height adjustment while also ensuring vehicle passability and handling stability. Adjustment of the air springs is powered by an air supply unit. However, the air pump in the air supply unit is quite noisy during operation, causing noise disturbance for passengers inside the vehicle. Utility Model Content

[0003] In view of this, this application provides an air supply unit, an air suspension system, and a vehicle to solve the problem of excessive noise in the air supply unit in the prior art.

[0004] In a first aspect, embodiments of this application provide a gas supply unit, comprising an air pump and a first cavity and / or a second cavity. The air pump is provided with a first pipe and a second pipe. The air pump is connected to a gas-consuming device through the first pipe and to the atmosphere through the second pipe. The first cavity is connected to the first pipe, and the cross-sectional area of ​​the first cavity is larger than the cross-sectional area of ​​the first pipe. The second cavity is connected to the second pipe, and the cross-sectional area of ​​the second cavity is larger than the cross-sectional area of ​​the second pipe.

[0005] In this embodiment, by connecting the first pipeline to the first cavity and / or connecting the second pipeline to the second cavity, the larger volume cavity can reflect sound waves during gas transmission, thereby reducing the energy of the sound waves and achieving the purpose of noise reduction.

[0006] In one possible implementation, the air supply unit further includes a silencer connected to the end of the second pipeline away from the air pump, and the silencer has multiple air holes. These air holes can be used for air intake or exhaust. For example, during exhaust, the gas in the second pipeline can be discharged into the outside atmosphere through the air holes on the silencer. When a high-speed airflow passes through the air holes, sound waves can be reflected at multiple angles at the air holes. The reflected sound waves can cancel each other out and buffer a portion of the noise, thereby reducing the exhaust noise at the port of the second pipeline connected to the atmosphere.

[0007] In one possible implementation, the silencing element is made of a flexible material. The silencing element, made of a flexible material, can undergo flexible deformation, making it suitable for installation in different environments.

[0008] In one possible implementation, the sound-absorbing component is made of nylon. A sound-absorbing component made of nylon possesses both good flexibility and good toughness, which helps to extend its service life.

[0009] In one possible implementation, the silencing element comprises multiple braided layers along the radial direction of the second conduit. The silencing element can be made of nylon sheet wound into a tubular shape. The nylon sheet can be woven, and the woven sheet may have pores between the nylon fibers, which can serve as the aforementioned air pores. The higher pore density in the woven nylon sheet is beneficial for air intake and exhaust, and also helps to improve the noise reduction effect.

[0010] In one possible implementation, a connector is provided on the first cavity, and the first pipeline is connected to the first cavity through the connector. The connector can be a quick-connect connector, which can be manufactured independently and assembled onto the first cavity. This quick-connect connector facilitates the connection between the first pipeline and the first cavity, ensuring reliable connection when transmitting high-pressure gas through the first pipeline.

[0011] In one possible implementation, the first pipeline includes a first sub-pipeline and a second sub-pipeline. One end of the first sub-pipeline is connected to the air pump, and the other end is connected to the first cavity. One end of the second sub-pipeline is connected to the first cavity, and the other end is used to connect to the gas-using device. The first cavity may have a connector on each side along the gas transmission direction, meaning the first cavity can connect to the first sub-pipeline through one connector and to the second sub-pipeline through the other connector. This facilitates integration of the first cavity into the gas supply unit, facilitates connection to the air pump via the first sub-pipeline, and facilitates connection to the gas-using device via the second sub-pipeline.

[0012] In one possible implementation, the second cavity has a port protruding from its surface, and the second conduit is fitted onto the port. The second conduit can be made of plastic, and its inner diameter can be slightly smaller than the outer diameter of the port. This allows the second conduit to be fitted onto the outside of the port using appropriate external force, creating an interference fit between the second conduit and the port, thus ensuring a reliable connection between the second conduit and the second cavity.

[0013] In one possible implementation, the second conduit includes a third sub-conduit and a fourth sub-conduit. One end of the third sub-conduit is connected to the air pump, and the other end is connected to the second cavity. One end of the fourth sub-conduit is connected to the second cavity, and the other end is connected to the atmosphere. The second cavity may have one port on each side along the gas transmission direction, meaning it can connect to the third sub-conduit through one port and to the fourth sub-conduit through the other. This facilitates integration of the second cavity into the gas supply unit, facilitates connection to the air pump via the third sub-conduit, and facilitates connection to the atmosphere via the fourth sub-conduit.

[0014] In one possible implementation, the first cavity and / or the second cavity are made of metal or plastic. Using metal or a rigid material to fabricate the first cavity ensures a stable structure and the ability to withstand higher gas pressures.

[0015] In one possible implementation, the air supply unit further includes a distribution valve. The inlet of the distribution valve is connected to the end of the first pipeline away from the air pump, and the outlet of the distribution valve is connected to the air-consuming device. The distribution valve may have multiple outlets. For example, the air-consuming device may include an air spring and an air tank. The distribution valve can communicate with the air spring through one outlet and with the air tank through another outlet. Thus, the distribution valve can communicate with multiple air-consuming devices.

[0016] Secondly, embodiments of this application also include an air suspension system, which includes an air-using device and an air supply unit provided in the first aspect of this application. The air supply unit is connected to the air-using device and is used to supply air to the air-using device or to discharge air from the air-using device.

[0017] Among them, the air suspension system including the aforementioned air supply unit has similar technical effects to the aforementioned air supply unit, and will not be described in detail here.

[0018] In one possible implementation, the gas-using device includes a gas storage tank and / or an air spring.

[0019] Thirdly, embodiments of this application also provide a vehicle, which includes the air suspension system provided in the second aspect of this application.

[0020] Vehicles equipped with the aforementioned air suspension system have similar technical effects to the aforementioned air suspension system.

[0021] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A system block diagram of the air suspension system provided in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the structure of the gas supply unit provided in the embodiments of this application;

[0025] Figure 3 This is a schematic diagram of the structure of a gas supply unit provided in another embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the structure of a gas supply unit provided in another embodiment of this application;

[0027] Figure 5 This is a partial schematic diagram of the gas supply unit at the first cavity provided in the embodiment of this application;

[0028] Figure 6 This is a partial schematic diagram of the gas supply unit at the second cavity provided in an embodiment of this application;

[0029] Figure 7 This is a system block diagram of an air suspension system provided in one embodiment of the present application;

[0030] Figure 8 This is a schematic diagram of the structure of a gas supply unit provided in another embodiment of this application;

[0031] Figure 9 This is a partial schematic diagram of the silencer in the air spring unit provided in the embodiment of this application.

[0032] Figure label:

[0033] 100-Air Suspension System

[0034] 200 - Gas supply unit;

[0035] 1-Air pump;

[0036] 2-First sub-pipeline; 21-First sub-pipeline; 22-Second sub-pipeline;

[0037] 3-Second sub-pipe; 31-Third sub-pipe; 32-Fourth sub-pipe;

[0038] 4-First cavity; 41-Connector;

[0039] 5-Second cavity; 51-Port; 52-Strap

[0040] 6-Silencer; 61-Air vent; 62-Clamp;

[0041] 7-Distribution valve;

[0042] 8-Gas supply device; 81-Gas storage tank; 82-Air spring;

[0043] 9-Filter. Detailed Implementation

[0044] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0045] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0046] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0047] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0048] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] With the development of automobile manufacturing technology, air suspension systems are increasingly being applied to passenger cars. Figure 1 Here is a system block diagram of an air suspension system, such as Figure 1As shown, the air suspension system may include an air tank 81, an air spring 82, and an air supply unit 200. The air spring 82 supports vehicle height adjustment, while also ensuring vehicle passability and handling stability, and providing comfort and convenience for passengers getting in and out of the vehicle.

[0050] The gas storage tank 81 can be used to store gas. The gas storage tank 81 can be connected to the air spring 82 via the gas supply unit 200. When the pressure of the gas storage tank 81 is sufficient, it can be used to inflate the air spring 82 to adjust the height of the air spring 82.

[0051] The air supply unit 200 may include a device such as an air pump for supplying compressed air. The air tank 81 and the air spring 82 can be powered by the air pump when they are in operation. However, the air pump is noisy when it is working, and the air inside the air spring 82 transmits air into the vehicle through both fluid and external air, which can cause noise pollution for the passengers inside the vehicle.

[0052] The air pump is generally connected to the air tank 81 or the air spring 82 in a straight-through manner through a pipeline. The gas fluctuations cannot be absorbed or suppressed by other media or other means, and the resulting noise will be transmitted between the air tank 81 and the air spring 82 and other components through the pipeline, resulting in relatively large noise.

[0053] Air pumps are typically connected to the atmosphere via pipes, which are devoid of any structural design. Since air pumps are usually piston pumps, exhibiting reciprocating motion, they also generate high-frequency and low-frequency noise during the intake process due to gas pressure fluctuations, and this noise level is relatively high.

[0054] In addition, during the descent of the air spring 82, that is, during the exhaust process, due to the use of a straight-through pipe to exhaust to the atmosphere, there will be a noticeable venting sound at the end of the exhaust process.

[0055] In related technologies, air pumps can be acoustically encased to reduce noise. However, this encasing treatment can only isolate some of the noise propagating in the air, but it cannot completely eliminate noise transmitted through pipes and other structures, nor can it eliminate noise propagated by the fluid inside the pipes.

[0056] Therefore, this application provides an air supply unit to solve the problem of high noise from air pumps.

[0057] like Figure 1 As shown, the air supply unit 200 provided in this embodiment is a component of the air suspension system 100. The air suspension system 100 can be applied to vehicles and can automatically adjust the vehicle height to reduce vehicle vibration.

[0058] The air suspension system 100 may include an air-consuming device 8, and an air supply unit 200 may be connected to the air-consuming device 8 to supply air to the air-consuming device 8 or to expel air from the air-consuming device 8. Exemplarily, the air-consuming device 8 may be an air tank 81 or an air spring 82, etc. Multiple air springs 82 may be provided, each corresponding to one wheel. Exemplarily, for a passenger vehicle with four wheels, four air springs 82 may be provided, with each of the four air springs 82 corresponding to one of the four wheels. The air tank 81 may be used to store gas, and the air tank 81 may be connected to the air spring 82 via the air supply unit 200. When the pressure in the air tank 81 is sufficient, it may be used to inflate the air spring 82 to adjust its height.

[0059] Figure 2 This is a schematic diagram of the structure of a gas supply unit provided in one embodiment of this application, as shown below. Figure 2 As shown, the air supply unit 200 may include an air pump 1, which can provide power to compress air and increase air pressure.

[0060] When the height of the air spring needs to be increased, the air pump 1 starts to draw in air. The air in the environment is compressed into high-pressure gas after passing through the air pump 1. The high-pressure gas can be distributed to each corresponding air spring, thereby increasing the height of the air spring.

[0061] When the height of the air spring needs to be reduced, the gas in the air spring can flow back into the air pump 1 and can be further discharged into the atmosphere.

[0062] In this embodiment, as Figure 2 As shown, the air pump 1 can be equipped with a first pipe 2 and a second pipe 3. The air pump 1 is connected to the air-using device through the first pipe 2. In this embodiment, the air pump 1 is connected to the air spring through the first pipe 2. The air pump 1 is connected to the atmosphere through the second pipe 3. During the air intake process, the air in the external environment can enter the second pipe 3 with the power provided by the air pump 1. After being pressurized by the air pump 1, high-pressure gas can be generated. The high-pressure gas can be delivered to the air spring through the first pipe 2. The first pipe 2 is a high-pressure pipe to withstand the greater pressure of the high-pressure gas generated by the air pump 1. The gas pressure in the second pipe 3 is lower than the gas pressure in the first pipe 2. Therefore, the second pipe 3 can be a high-pressure pipe or not, and the selection of the second pipe 3 has great flexibility. The materials of the first pipe 2 and the second pipe 3 can be the same or different. The material of the first pipe 2 must have a stronger pressure resistance than the material of the second pipe 3.

[0063] like Figure 2As shown, a filter 9 can be installed in the second pipeline 3, and a desiccant can be installed in the filter 9 to filter out moisture, impurities and other contaminants in the air entering the second pipeline 3 from the external environment, thereby ensuring the cleanliness of the air entering the air pump 1.

[0064] like Figure 2 As shown, the gas supply unit 200 also includes a first cavity 4, which is connected to the first pipeline 2. The first cavity 4 is a hollow structure, wherein, in the direction perpendicular to the gas transmission direction, the cross-sectional area of ​​the first cavity 4 is larger than the cross-sectional area of ​​the first pipeline 2, that is, under the condition that the first cavity 4 and the first pipeline 2 have the same length, the first cavity 4 has a relatively larger space.

[0065] The first cavity 4 can be made of metal, such as aluminum. Alternatively, it can be made of rigid plastic. Using metal or rigid materials to fabricate the first cavity 4 ensures a stable structure and the ability to withstand higher gas pressures.

[0066] When the height of the air spring needs to be increased, air pump 1 starts to draw in air. Air from the environment enters air pump 1 through the second pipe 3. Air pump 1 generates high-pressure gas, which enters the first pipe 2 and the first cavity 4, and is further distributed to the corresponding air springs, thereby increasing the height of the air springs. As explained earlier, during the air intake process, the gas pressure in the first pipe 2 is usually greater than the gas pressure in the second pipe 3, making high-frequency noise easily generated in the first pipe 2. In this embodiment, because the first cavity 4 has a large space, when the high-pressure gas enters the first cavity 4 from the first pipe 2, the abrupt change in cross-sectional area between the first pipe 2 and the first cavity 4 causes some of the high-frequency sound waves to be reflected back to the first pipe 2 after reaching the first cavity 4, thus dissipating sound energy and reducing high-frequency noise.

[0067] Figure 3 This is a schematic diagram of the structure of a gas supply unit provided in another embodiment of this application, as shown below. Figure 3 As shown, in this embodiment, the second pipeline 3 is connected to the second cavity 5, which is a hollow structure. In the direction perpendicular to the gas transmission direction, the cross-sectional area of ​​the second cavity 5 is greater than that of the second pipeline 3. That is, under the condition that the second cavity 5 and the second pipeline 3 have the same length, the second cavity 5 has a relatively larger space.

[0068] During the air intake process, the gas pressure in the second pipe 3 may be lower than the gas pressure in the first pipe 2, which can easily generate low-frequency noise in the second pipe 3. In this embodiment, since the second cavity 5 has a large space, when the low-pressure gas enters the second cavity 5 from the second pipe 3, the cross-sectional area between the second pipe 3 and the second cavity 5 changes abruptly. This causes some of the sound wave energy to be reflected back to the second pipe 3 after the low-frequency sound waves of the intake reach the second cavity 5, thereby consuming the sound energy and reducing low-frequency noise.

[0069] The material of the second cavity 5 can also be the aforementioned metal or rigid plastic. Using metal or rigid materials to fabricate the second cavity 5 ensures that it has a stable structure and can withstand higher gas pressures.

[0070] Figure 4 This is a schematic diagram of the structure of a gas supply unit provided in another embodiment of this application, as shown below. Figure 4 As shown, the air supply unit 200 may include a first cavity 4 and a second cavity 5. The first cavity 4 is connected to the first pipe 2, and the second cavity 5 is connected to the second pipe 3, meaning that both the first pipe 2 and the second pipe 3 are connected to cavities. When the height of the air spring needs to be increased, the air pump 1 starts to draw in air. Air from the environment enters the air pump 1 through the second pipe 3 and the second cavity 5. The air pump 1 can generate high-pressure gas, which can enter the first pipe 2 and the first cavity 4 and be further distributed to the corresponding air springs, thereby increasing the height of the air springs. As explained above, the first cavity 4 can reduce high-frequency noise, and the second cavity 5 can reduce low-frequency noise. Therefore, by setting the first cavity 4 and the second cavity 5, both high-frequency and low-frequency noise during the air intake process can be reduced simultaneously, with a noise reduction of up to 10 dB.

[0071] In this embodiment, the first pipe 2 is connected to the first cavity 4, and the second pipe 3 is connected to the second cavity 5. During gas transmission, the large-volume cavity can reflect sound waves, reduce the energy of the sound waves, and achieve the purpose of reducing noise.

[0072] Figure 5 This is a partial schematic diagram of the gas supply unit at the first cavity 4 provided in the embodiments of this application, as shown below. Figure 5 As shown, a connector 41 can be provided on the first cavity 4, connecting the first cavity 4 and the first pipeline 2. This connector 41 can be a quick-connect connector, which can be independently manufactured and assembled onto the first cavity 4 to facilitate the connection between the first pipeline 2 and the first cavity 4. When high-pressure gas is transmitted through the first pipeline 2, the first pipeline 2 is less likely to detach from the first cavity 4, ensuring the reliability of the connection between the first pipeline 2 and the first cavity 4.

[0073] likeFigure 5 As shown, the first pipeline 2 may include a first sub-pipeline 21 and a second sub-pipeline 22. One end of the first sub-pipeline 21 is connected to the air pump 1, and the other end of the first sub-pipeline 21 is connected to the first cavity 4. One end of the second sub-pipeline 22 is connected to the first cavity 4, and the other end of the second sub-pipeline 22 is used to connect to the gas-using device. The first cavity 4 may have a connector 41 on each side along the gas transmission direction. That is, the first cavity 4 can be connected to the first sub-pipeline 21 through one connector 41 and to the second sub-pipeline 22 through the other connector 41. This facilitates the integration of the first cavity 4 into the gas supply unit 200, facilitates connection to the air pump 1 via the first sub-pipeline 21, and facilitates connection to the gas-using device via the second sub-pipeline 22.

[0074] During the air intake process, the high-pressure gas generated by the air pump 1 can pass through the first sub-pipe 21, the first cavity 4 and the second sub-pipe 22 in sequence before entering the gas-using device.

[0075] Figure 6 This is a partial schematic diagram of the gas supply unit at the second cavity 5 provided in the embodiments of this application, as shown below. Figure 6 As shown, a port 51 may be provided on the second cavity 5, protruding from the surface of the second cavity 5. The end of the second pipe 3 may be fitted onto the outside of the port 51. The material of the second pipe 3 may be plastic, and the inner diameter of the second pipe 3 may be slightly smaller than the outer diameter of the port 51. Thus, the second pipe 3 can be fitted onto the outside of the port 51 by appropriate external force, that is, an interference fit can be formed between the second pipe 3 and the port, thereby ensuring a reliable connection between the second pipe 3 and the second cavity 5. In some embodiments, the part of the second pipe 3 that mates with the port may also be further secured with a strap 52 to ensure the reliability of the connection between the second pipe 3 and the second cavity 5.

[0076] like Figure 6 As shown, the second pipeline 3 may include a third sub-pipeline 31 and a fourth sub-pipeline 32. One end of the third sub-pipeline 31 is connected to the air pump 1, and the other end of the third sub-pipeline 31 is connected to the second cavity 5. One end of the fourth sub-pipeline 32 is connected to the second cavity 5, and the other end of the fourth sub-pipeline 32 is used to connect to the gas supply device. The second cavity 5 may have a port 51 on each side along the gas transmission direction, meaning that the second cavity 5 can connect to the third sub-pipeline 31 through one port 51 and to the fourth sub-pipeline 32 through the other port 51. This facilitates the integration of the second cavity 5 into the gas supply unit, facilitates connection to the air pump 1 via the third sub-pipeline 31, and facilitates connection to the atmosphere via the fourth sub-pipeline 32.

[0077] During the air intake process, the air in the external environment can enter the air pump 1 through the fourth sub-pipe 32, the second cavity 5 and the third sub-pipe 31 in sequence, powered by the air pump 1. The high-pressure gas generated by the air pump 1 can then enter the gas-using device through the first sub-pipe 21, the first cavity 4 and the second sub-pipe 22 in sequence.

[0078] Figure 7 This is a system block diagram of an air suspension system provided in one embodiment of this application, such as... Figure 7 As shown, the air suspension system 100 includes an air tank 81, four air springs 82, and an air supply unit 200, which may also include a distribution valve 7. Gas from the air tank 81 enters the air springs 82 via the distribution valve 7. The distribution valve 7 may have multiple outlets, enabling communication with multiple air-using devices 8. For example, an air-using device 8 may include an air spring 82 and an air tank 81. The distribution valve 7 can communicate with the air spring 82 through one outlet and with the air tank 81 through another outlet. The distribution valve 7 also has an inlet, which connects to a second sub-pipeline 22. Thus, the distribution valve 7 can be used to supply or exhaust air to multiple air-using devices 8, simplifying the system structure and improving integration.

[0079] During the air intake process, the air in the external environment can enter the air pump 1 through the fourth sub-pipe 32, the second cavity 5 and the third sub-pipe 31 in sequence, powered by the air pump 1. The high-pressure gas generated by the air pump 1 can further enter the corresponding gas-using device through the first sub-pipe 21, the first cavity 4, the second sub-pipe 22 and the distribution valve 7 in sequence. For example, the distribution valve 7 can distribute the high-pressure gas to the air spring 82 or the air tank 81.

[0080] During the exhaust process, the gas in the gas-using device can enter the first pipeline 2 through the distribution valve 7, and can be further exhausted to the outside through the air pump 1 and the second pipeline 3. As explained above, during the exhaust process of the gas-using device, a noticeable venting sound will be heard at the end of the pipeline at the end of the exhaust process. Therefore, Figure 8 The illustrated embodiments are able to solve this technical problem.

[0081] Figure 8 This is a schematic diagram of the structure of a gas supply unit provided in another embodiment of this application, as shown below. Figure 8 As shown, the air supply unit 200 includes an air pump 1, a first pipeline 2, a second pipeline 3, and a distribution valve 7. The first pipeline 2 is connected to a first cavity 4, and the second pipeline 3 is connected to a second cavity 5. One end of the first pipeline 2 is connected to the air pump 1, and the other end is connected to the distribution valve 7. One end of the second pipeline 3 is connected to the air pump 1, and the other end is open to the atmosphere.

[0082] The air supply unit 200 also includes a silencer 6, which can be connected to the end of the second pipeline 3 away from the air pump 1. Exemplarily, the silencer 6 can be bonded to the second pipeline 3, or it can be bound to the second pipeline 3 by a connector such as a clamp 62.

[0083] Figure 9 This is a partial schematic diagram of the silencer 6 in the air spring unit provided in the embodiments of this application, as shown below. Figure 9 As shown, the muffler 6 can be provided with multiple air holes 61, which can be distributed discretely or in a certain pattern. These air holes 61 can be used for air intake or exhaust.

[0084] During the exhaust process, the gas in the second pipe 3 can be discharged into the outside atmosphere through the vent 61 on the muffler 6. When the high-speed airflow passes through the vent 61, the sound waves can be reflected at the vent 61 at multiple angles. The reflected sound waves can cancel each other out and buffer a portion of the noise, thereby reducing the exhaust noise at the port of the second pipe 3 that is connected to the atmosphere.

[0085] The muffler 6 can be made of a flexible material; for example, the material of the muffler 6 can be nylon. The muffler 6 made of this flexible material can undergo flexible deformation, making it suitable for installation in different environments. In particular, the muffler 6 made of nylon material has both good flexibility and good toughness, which helps to extend the service life of the muffler 6.

[0086] The sound-absorbing component 6 can be made of nylon sheet wound into a tubular shape. The nylon sheet can be woven, and there can be pores between the nylon fibers in the woven sheet. These pores can serve as the aforementioned air holes 61. In particular, the pore distribution density in the woven nylon sheet is relatively high, which is beneficial for air intake and exhaust, and also helps to improve the noise reduction effect.

[0087] Among them, such as Figure 9 As shown, the nylon sheet formed by the weaving process can be wound multiple times in a single direction, so that the sound-absorbing component 6 can include multiple layers of braided structure in the radial direction of the second pipe 3. Each layer of braided structure includes multiple pores 61 with a high distribution density. When the gas in the second pipe 3 is discharged to the outside atmosphere through the sound-absorbing component 6, the sound waves will be reflected at the pores 61 of each layer of braided structure as the gas passes through them in the radial direction of the second pipe 3. This can enhance the noise reduction effect through the pores 61 of the multiple layers of braided structure.

[0088] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gas supply unit, characterized by, The application relates to a gas supply unit. The gas supply unit comprises: a gas pump, which is provided with a first pipeline and a second pipeline, the gas pump is communicated with a gas using device through the first pipeline, and the gas pump is communicated with the atmosphere through the second pipeline; a first cavity, which is communicated with the first pipeline, and the cross-sectional area of the first cavity is larger than that of the first pipeline; 2. The gas supply unit according to claim 1, characterized in that and / or a second cavity, which is communicated with the second pipeline, and the cross-sectional area of the second cavity is larger than that of the second pipeline.

3. The gas supply unit of claim 2, wherein, The gas supply unit further comprises a silencer, which is connected to one end of the second pipeline away from the gas pump, and the silencer is provided with a plurality of air holes.

4. The gas supply unit of claim 3, wherein, The silencer is made of flexible material.

5. The gas supply unit of claim 4, wherein, The material of the silencer is nylon.

6. The gas supply unit according to any one of claims 1 to 5, characterized in that The silencer comprises a plurality of woven layers along the radial direction of the second pipeline.

7. The gas supply unit according to any one of claims 1 to 5, characterized in that The first cavity is provided with a joint, and the first pipeline is connected with the first cavity through the joint. The first pipeline comprises a first sub-pipeline and a second sub-pipeline, one end of the first sub-pipeline is communicated with the gas pump, and the other end of the first sub-pipeline is communicated with the first cavity; 8. The gas supply unit according to any one of claims 1 to 5, characterized in that one end of the second sub-pipeline is communicated with the first cavity, and the other end of the second sub-pipeline is used for being communicated with the gas using device.

9. The gas supply unit according to any one of claims 1 to 5, characterized in that The second cavity is provided with a port, the port protrudes from the surface of the second cavity, and the second pipeline is sleeved on the port. The second pipeline comprises a third sub-pipeline and a fourth sub-pipeline, one end of the third sub-pipeline is communicated with the gas pump, and the other end of the third sub-pipeline is communicated with the second cavity; 10. The gas supply unit according to any one of claims 1 to 5, characterized in that one end of the fourth sub-pipeline is communicated with the second cavity, and the other end of the fourth sub-pipeline is used for being communicated with the atmosphere.

11. The gas supply unit according to any one of claims 1 to 5, characterized in that The material of the first cavity and / or the second cavity is metal or plastic.

12. An air suspension system characterized by, The gas supply unit further comprises a distribution valve, the air inlet of the distribution valve is connected with one end of the first pipeline away from the gas pump, and the air outlet of the distribution valve is connected with the gas using device.

13. The air suspension system of claim 12, wherein, The application relates to a gas supply unit.

14. A vehicle characterized by comprising: The gas using device comprises an air tank and / or an air spring. The application relates to an air suspension system. The application relates to an air suspension system.

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