Compressed air supply facility, control method, system, controller and storage medium

Abstract

The present invention discloses a compressed air supply facility, a control method, a system, a controller and a storage medium. The compressed air supply facility is applied to an air suspension system. The facility includes: a gas port connected to the surrounding environment, a pneumatic exhaust valve, an exhaust solenoid valve and an air spring module. One end of the exhaust solenoid valve is connected to the air spring module, and the other end is connected to the first interface of the pneumatic exhaust valve. The second interface and the third interface of the pneumatic exhaust valve are connected. The fourth interface of the pneumatic exhaust valve is connected to the gas port. The exhaust solenoid valve is used to control the high-pressure gas of the air spring module to flow to the first interface of the pneumatic exhaust valve, so that the first interface is connected to the second interface and the third interface is connected to the fourth interface, so that the high-pressure gas is discharged from the gas port. The two-position two-way exhaust solenoid valve can make the pneumatic exhaust valve retain a certain residual pressure, reduce the pressure surge caused by the opening of the exhaust solenoid valve, increase the service life of the exhaust solenoid valve, and improve the exhaust speed.

Description

Technical Field

[0001] The present application relates to the technical field of compressed air devices, and in particular to a compressed air supply facility, a control method, an air suspension system, a controller, and a storage medium. Background Art

[0002] Currently, air suspension systems are widely used in commercial vehicles such as large buses and heavy trucks. Air suspension systems mainly use air springs to absorb small vibrations, thereby improving the comfort of users when riding in the vehicle. By controlling the pressure of the air springs, the height of the vehicle can be adjusted to a predetermined height, thereby improving the vehicle's driving stability.

[0003] Existing air suspension systems generally achieve exhaust of compressed air supply facilities by controlling the on and off of pneumatic exhaust solenoid valves. Among them, most pneumatic exhaust valves are two-position three-way solenoid valves, which can control the pressure of the pre-control chamber of the pneumatic exhaust valve to be converted from the ambient atmosphere to the pressure in the air spring / compressed air storage. As a result, the pressure in the corresponding chamber of the pneumatic exhaust valve suddenly changes when the two-position three-way solenoid valve is turned on, causing impact on the preloaded spring, affecting the service life of the pneumatic exhaust valve, and reducing the exhaust reliability of the compressed air supply facilities and the air suspension system. Summary of the Invention

[0004] The following is an overview of the topics described in detail in this article.

[0005] The embodiments of the present application provide a compressed air supply facility, a control method, an air suspension system, a controller and a storage medium, which can at least ensure that the scheme of the present application can effectively reduce the spring preload requirement for the pneumatic exhaust valve, increase the life of the pneumatic exhaust valve, and improve the exhaust reliability of the compressed air supply facility and the air suspension system.

[0006] An embodiment of the first aspect of the present invention provides a compressed air supply facility, which is applied to an air suspension system. The compressed air supply facility includes: a gas port connected to the surrounding environment, a pneumatic exhaust valve, an exhaust solenoid valve and an air spring module; one end of the exhaust solenoid valve is connected to the air spring module, and the other end is connected to the first interface of the pneumatic exhaust valve, the second interface and the third interface of the pneumatic exhaust valve are connected, and the fourth interface of the pneumatic exhaust valve is connected to the gas port.

[0007] The exhaust solenoid valve is used to control the high-pressure gas of the air spring module to flow to the first interface of the pneumatic exhaust valve, so that the first interface is connected with the second interface and the third interface is connected with the fourth interface, so that the high-pressure gas is discharged from the gas port.

[0008] According to the compressed air supply facility of the embodiment of the first aspect of the present invention, there are at least the following beneficial effects: the compressed air supply facility of the present application is applied to an air suspension system, comprising: a gas port connected to the surrounding environment, a pneumatic exhaust valve, an exhaust solenoid valve and an air spring module, one end of the exhaust solenoid valve is connected to the air spring module, and the other end is connected to the first interface of the pneumatic exhaust valve, the second interface and the third interface of the pneumatic exhaust valve are connected, and the fourth interface of the pneumatic exhaust valve is connected to the gas port; the exhaust solenoid valve is used to control the high-pressure gas of the air spring module to flow to the first interface of the pneumatic exhaust valve, so that the first interface is connected to the second interface, and the third interface is connected to the fourth interface, so that the high-pressure gas is discharged from the gas port, wherein the exhaust solenoid valve is set as a two-position two-way solenoid valve and is placed between the pneumatic exhaust valve and the air spring module. When the exhaust solenoid valve is closed and the pneumatic exhaust valve stops exhausting, a certain residual pressure can be retained. On the one hand, the sudden change of the pre-control pressure chamber pressure when the exhaust solenoid valve is opened next time is reduced, thereby improving the reliability of the spring; on the other hand, the pressure can be quickly reduced and the exhaust speed can be increased.

[0009] In some embodiments, a throttle valve and a drying part are provided on the gas path between the second interface and the third interface.

[0010] In some embodiments, the compressed air supply facility also includes an air compression part and a one-way valve, the gas inlet of the air compression part is connected to the gas port, the gas outlet of the air compression part is connected to one end of the drying part, and the other end of the drying part is connected to the air spring module through the one-way valve.

[0011] In some embodiments, the third interface is respectively connected to the gas outlet and the drying section, and the pneumatic exhaust valve is used to connect the third interface with the fourth interface when the pre-control pressure at the third interface is greater than the pressure threshold, so that the high-pressure gas at the gas outlet flows from the fourth interface to the gas port and is discharged.

[0012] In some embodiments, the air spring module includes an air spring control assembly, the air spring control assembly includes multiple air spring valves, the air suspension system also includes an air tank and multiple air springs, the air spring valve is connected to the air spring, and the air spring control assembly is connected to the air tank through a first reversing solenoid valve, and the first reversing solenoid valve is used to control the inflow and outflow of gas in the air tank.

[0013] In some embodiments, the air compression section is a two-stage compression section, which includes a first pressure stage and a second pressure stage. The gas inlet is the air inlet of the first pressure stage, and the gas outlet is the exhaust port of the second pressure stage. The exhaust port of the first pressure stage is connected to the air inlet of the second pressure stage. The gas storage tank is connected to the air inlet of the second pressure stage through a second reversing solenoid valve. The second reversing solenoid valve is used to control the gas in the gas storage tank to flow to the second pressure stage, and flow to the air spring module after being compressed by the second pressure stage.

[0014] In some embodiments, the interior of the pneumatic exhaust valve is connected to the gas port, and the pneumatic exhaust valve includes a pneumatic push rod, a low-pressure limiting spring and a high-pressure limiting spring. The pneumatic push rod is arranged between the first interface and the second interface, and the pneumatic push rod is arranged between the third interface and the fourth interface. One end of the pneumatic push rod is respectively connected to the low-pressure limiting spring and the high-pressure limiting spring. When the pressure of the high-pressure gas acting on the pneumatic push rod at the first interface is greater than the preload force and deformation force of the low-pressure limiting spring and the high-pressure limiting spring acting on the pneumatic push rod respectively, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

[0015] In some embodiments, when the pressure of the high-pressure gas acting on the pneumatic push rod at the third interface is greater than the deformation force of the high-pressure limiting spring acting on the pneumatic push rod, the third interface is connected to the fourth interface.

[0016] An embodiment of a second aspect of the present invention provides a compressed air supply facility control method, which is applied to a compressed air supply facility, wherein the compressed air supply facility includes: a gas port connected to the surrounding environment, a pneumatic exhaust valve, an exhaust solenoid valve, and an air spring module, wherein one end of the exhaust solenoid valve is connected to the air spring module, and the other end is connected to the first interface of the pneumatic exhaust valve, the second interface of the pneumatic exhaust valve is connected to the third interface, the second interface of the pneumatic exhaust valve is connected to the third interface, and the fourth interface of the pneumatic exhaust valve is connected to the gas port, and the method includes:

[0017] The exhaust solenoid valve is controlled to be connected so that the high-pressure gas in the air spring module flows to the pneumatic exhaust valve, so that the first interface is connected with the second interface, and the third interface is connected with the fourth interface, so that the high-pressure gas is discharged from the gas port.

[0018] In some embodiments, the compressed air supply facility further includes an air compression unit, the third interface is connected to a gas outlet of the air compression unit, and the method further includes:

[0019] The air compression unit is controlled to output high-pressure gas through the gas outlet. When the pre-control pressure at the third interface of the pneumatic exhaust valve is greater than the pressure threshold, the third interface in the pneumatic exhaust valve is connected to the fourth interface, so that the high-pressure gas flows from the fourth interface to the gas port and is discharged.

[0020] In some embodiments, the air spring module includes an air spring control assembly and an air tank, the air spring module includes the air spring control assembly, the air suspension system further includes an air tank, and the method further includes:

[0021] The inflow and outflow of gas in the gas storage tank is controlled by the first reversing solenoid valve.

[0022] In some embodiments, the air compression unit is a two-stage compression unit, which includes a first pressure stage and a second pressure stage, and the air storage tank is connected to the air inlet of the second pressure stage through a second reversing solenoid valve. The method further includes:

[0023] The second reversing solenoid valve is controlled to be connected so that the gas in the gas storage tank flows to the second pressure stage, and then flows to the air spring module after being compressed by the second pressure stage.

[0024] An embodiment of the third aspect of the present invention provides an air suspension system, comprising the compressed air supply facility as described in any one of the embodiments of the first aspect.

[0025] An embodiment of the fourth aspect of the present invention provides a controller, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the computer program, the compressed air supply facility control method as described in any one of the embodiments of the second aspect above is implemented.

[0026] An embodiment of the fifth aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the compressed air supply facility control method as described in any one of the embodiments of the second aspect above.

[0027] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an air circuit state diagram of a compressed air supply facility applied to an air suspension system provided by one embodiment of the present invention;

[0029] Figure 2 is an air path state diagram of a compressed air supply facility of an air suspension system during exhaust, provided by another embodiment of the present invention;

[0030] Figure 3 This is an air circuit state diagram of a compressed air supply facility of an air suspension system during high-pressure protection, provided by another embodiment of the present invention;

[0031] Figure 4 is a cross-sectional view of a pneumatic exhaust valve in a closed state in a compressed air supply facility provided by another embodiment of the present invention;

[0032] Figure 5 is a cross-sectional view of a pneumatic exhaust valve in a compressed air supply facility provided by another embodiment of the present invention in a deflated state;

[0033] Figure 6 is a cross-sectional view of a pneumatic exhaust valve in a compressed air supply facility provided by another embodiment of the present invention in a high-pressure protection state;

[0034] Figure 7 is a flow chart of a compressed air supply facility control method provided by another embodiment of the present invention;

[0035] Figure 8 This is a flow chart of a method for controlling a compressed air supply facility provided by another embodiment of the present invention, in which the third interface is connected to the fourth interface;

[0036] Figure 9 This is a flow chart of connecting the second reversing solenoid valve in a method for controlling a compressed air supply facility provided by another embodiment of the present invention;

[0037] Figure 10 2 is a schematic diagram of a controller for operating a compressed air supply facility control method provided in another embodiment of the present invention.

[0038] Figure markings: 1. Gas port; 2. Air compression section; 3. Drying section; 4. One-way valve; 5 to 8. Air spring valve; 9. Air storage tank; 10. First reversing solenoid valve; 11. Second reversing solenoid valve; 12. Exhaust solenoid valve; 13. Pneumatic exhaust valve; 14. Throttle valve; 15 to 18. Air spring; 19. Pressure sensor; 100. Compressed air supply facility; 101. Pneumatic push rod; 102. Low-pressure limiting spring; 103. High-pressure limiting spring; 200. Air circuit node; 300. Air spring module; 1000. Air suspension system. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be exchanged or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various orders in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary order, unless otherwise specified that a certain order must be followed.

[0040] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0041] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0042] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0043] Currently, compressed air supply facilities are widely used in commercial vehicles such as large buses and heavy trucks. Compressed air supply facilities mainly use air springs to absorb tiny vibrations, thereby improving the comfort of users when riding in the vehicle. By controlling the pressure of the air springs, the height of the vehicle can be adjusted to a predetermined height, thereby improving the vehicle's driving stability.

[0044] Existing compressed air supply facilities generally achieve exhaust of compressed air supply facilities by controlling the on and off of a pneumatic exhaust solenoid valve, wherein one end of the pneumatic exhaust valve is always connected to an air spring and / or a compressed air storage device, causing the pressure in the corresponding chamber of the pneumatic exhaust valve to change with the change of the pressure in the air spring and / or the compressed air storage device. This places a high demand on the spring preload force of the pneumatic exhaust valve, affecting the service life of the pneumatic exhaust valve and reducing the exhaust reliability of the compressed air supply facility.

[0045] Based on the above situation, an embodiment of the present invention provides a compressed air supply facility, a control method, an air suspension system, a controller and a storage medium. According to the technical solution of an embodiment of the present invention, the compressed air supply facility is connected to one end of the exhaust solenoid valve through an air spring module, the other end of the exhaust solenoid valve is connected to the first interface of the pneumatic exhaust valve, the second interface and the third interface of the pneumatic exhaust valve are connected, and the fourth interface of the pneumatic exhaust valve is connected to the gas port. The exhaust solenoid valve is used to control the high-pressure gas of the air spring module to flow to the pneumatic exhaust valve so that the first interface is connected to the second interface, and the third interface is connected to the fourth interface, so that the high-pressure gas is discharged from the gas port. The exhaust solenoid valve is set as a two-position two-way solenoid valve and is placed between the pneumatic exhaust valve and the air spring module. When the exhaust solenoid valve is closed and the pneumatic exhaust valve stops exhausting, a certain residual pressure can be retained. On the one hand, the sudden change of the pre-control pressure chamber pressure when the exhaust solenoid valve is opened next time is reduced, thereby improving the reliability of the spring; on the other hand, the pressure can be quickly reduced, thereby increasing the exhaust speed.

[0046] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0047] like Figure 1 As shown, Figure 1 1 is an air circuit state diagram of a compressed air supply facility 100 applied to an air suspension system 1000 provided in accordance with an embodiment of the present invention.

[0048] In some embodiments, the compressed air supply facility 100 includes: a gas port 1 connected to the surrounding environment, a pneumatic exhaust valve 13, an exhaust solenoid valve 12 and an air spring module 300, wherein the gas port 1 is used for the compressed air supply facility 100 to inhale air from the external environment and exhaust air to the external environment, the air spring module 300 is used to control the pressure of the air spring so that the height of the vehicle can be adjusted to a predetermined height, the pneumatic exhaust valve 13 and the exhaust solenoid valve 12 are used to control the intake and exhaust of the air spring module 300; the air spring module 300 is connected to one end of the exhaust solenoid valve 12, and the other end of the exhaust solenoid valve 12 is connected to the first connection of the pneumatic exhaust valve 13. The first and second interfaces of the pneumatic exhaust valve 13 are connected, and the fourth interface of the pneumatic exhaust valve 13 is connected to the gas port 1; the exhaust solenoid valve 12 is used to control the high-pressure gas of the air spring module 300 to flow to the pneumatic exhaust valve 13, so that the first interface is connected to the second interface, and the third interface is connected to the fourth interface, so that the high-pressure gas is discharged from the gas port 1. The exhaust solenoid valve 12 has the function of pre-controlling the pneumatic exhaust valve 13. It can only be opened when the pressure in the system is sufficient. The compressed air is discharged into the surrounding environment after the gas drying treatment of the drying part 3; in addition, when the pressure in the system exceeds the safety pressure, the pneumatic exhaust valve 13 will also open to discharge the high-pressure air to the environment to ensure the safety of the system.

[0049] refer to Figure 1 The air suspension system 1000 has a compressed air supply facility 100 , an air tank 9 serving as a compressed air storage device, and air springs 15 , 16 , 17 , and 18 .

[0050] The compressed air supply facility 100 comprises:

[0051] A gas port 1 communicating with the environment;

[0052] An air compression unit 2 for providing compressed air;

[0053] A drying section 3 for drying compressed air, the drying section 3 being connected to the air compression section 2;

[0054] a one-way valve 4 for preventing the compressed gas from flowing back into the drying section 3;

[0055] Air spring valves 5, 6, 7, and 8 for controlling the compressed air in and out of the front air springs 15 and 16, and the rear axle air springs 17 and 18, respectively;

[0056] A first reversing solenoid valve 10 for controlling the flow of compressed air into and out of the air storage tank 9;

[0057] A second reversing solenoid valve 11 for allowing the high-pressure gas in the gas storage tank 9 to flow back to the air compression unit 2;

[0058] A two-position, two-way exhaust solenoid valve 12 and a pneumatic exhaust valve 13 are used to control the exhaust of compressed air in the system to the environment.

[0059] In some embodiments, in order to realize the compressed air storage function of the air suspension system 1000, the air tank 9 is connected to the main line of the high-pressure stage 2.2 outlet of the air compression part 2 of the compressed air supply facility 100 through the air tank reversing gas path where the second reversing solenoid valve 11 is located. In order to realize the secondary compression of the gas, the air compression part 2 includes a low-pressure stage 2.1 and a high-pressure stage 2.2. The exhaust port of the low-pressure stage 2.1 and the air inlet of the high-pressure stage 2.2 are connected by default. The low-pressure stage 2.1 is used to compress the air for the first time, and the high-pressure stage 2.2 is used to compress the air for the second time. In order to replenish the compressed gas to the air spring group 300, the air spring valves 5, 6, 7, and 8 are located in the air. The air spring circuit is connected not only to the main air circuit where the pneumatic exhaust valve 13 and the exhaust solenoid valve 12 are located, but also to the reversing circuit where the air tank 9 is located through the air circuit node 200; in order to realize the deflation function of the air spring module 300, the air spring module 300 is also connected to the deflation circuit where the exhaust solenoid valve 12 is located through the node 200, and finally connected to the gas port 1 through the pneumatic exhaust valve 13; in order to achieve compression enhancement and quickly inflate the air spring module 300, the air tank 9 is connected to the first reversing solenoid valve 10, so that the high-pressure gas in the air tank 9 can come to the high-pressure stage 2.2 inlet of the air compression part 2 again, and then be sent to the air spring module 300 after compression.

[0060] In some embodiments, the compressed air supply facility 100 pre-controls the pneumatic exhaust valve 13 through the exhaust solenoid valve 12, wherein the exhaust solenoid valve 12 acts as a pre-control valve. The facility is characterized in that only a relatively low force is required to adjust the pneumatic exhaust valve 13, thereby resulting in less loss of operating force of the pre-control valve; at the same time, the exhaust diameter can be increased and the exhaust noise can be reduced.

[0061] In some embodiments, the exhaust solenoid valve 12 in the present application is a two-position, two-way exhaust solenoid valve, which acts as a pre-control solenoid valve in the compressed air supply facility 100, can effectively ensure the controllability and reliability of the pneumatic exhaust valve 13 and further improve the compactness of the structure of the compressed air supply facility 100, making the structure of the compressed air supply facility 100 simple and effective.

[0062] In some embodiments, the pre-control solenoid valve in the prior art uses a two-position three-way solenoid valve to convert the pre-control pressure chamber of the pneumatic exhaust valve 13 from being connected to the environment to being connected to the air spring and / or the compressed air reservoir, resulting in a change in the pre-control pressure, thereby controlling the on and off of the pneumatic exhaust solenoid valve 12; however, the other end of the pre-control pressure (the second pre-control pressure chamber) is always connected to the air spring and / or the compressed air reservoir, which will cause the pressure of the second pre-control pressure chamber to change with the change of the pressure in the air spring and / or the compressed air reservoir. When the pressure in the second pre-control pressure chamber is too high, the pneumatic exhaust valve 13 may be opened in an uncontrollable manner, or a pre-compression spring with extremely high stiffness may need to be designed to generate sufficient pre-compression, so that the size of the spring is too large. The air pressure in the air spring and / or the compressed air storage tank 9 is increased, and the volume of the entire pneumatic exhaust valve 13 is increased, which affects the compactness of the compressed air supply facility 100 and the reliability of the pneumatic exhaust valve 13. The pneumatic exhaust valve 13 in the present application is a two-position, two-way exhaust solenoid valve 12. The first pre-control chamber of the pneumatic exhaust valve 13 is always kept in communication with the ambient atmosphere. One end of the two-position, two-way solenoid valve is connected to the air spring and / or the compressed air storage tank 9, and the other end is connected to the second pre-control chamber of the pneumatic exhaust valve 13. By controlling the on and off of the exhaust solenoid valve 12, the high-pressure air of the air spring and / or the air storage tank 9 can be sent to the second pre-control chamber of the pneumatic exhaust valve 13 to counteract the atmospheric pressure and the preload spring of the first pre-control chamber, so that the pneumatic exhaust valve 13 is opened to realize the deflation process of the system.

[0063] Among them, the first pre-control chamber of the pneumatic exhaust valve 13 corresponds to the fourth interface of the pneumatic exhaust valve 13 mentioned in this application, and the second pre-control chamber of the pneumatic exhaust valve 13 corresponds to the first interface of the pneumatic exhaust valve 13 mentioned in this application. The first pre-control chamber maintains the pressure unchanged, and the second pre-control chamber is connected to the air spring and / or the air tank 9 through a two-position exhaust solenoid valve. The second interface and the third interface of the pneumatic exhaust valve 13 are connected, and the pneumatic exhaust valve 13 is controlled by the on-off control of the exhaust solenoid valve 12 to realize the deflation process of the compressed air supply facility 100, and the high-pressure gas of the air spring module 300 is controlled to flow to the pneumatic exhaust valve 13 so that the first interface is connected to the second interface, and the third interface is connected to the fourth interface, so that the high-pressure gas is discharged from the gas port 1. The exhaust solenoid valve is a two-position two-way exhaust solenoid valve, which can enable the pneumatic exhaust valve to retain a certain residual pressure, reduce the pressure surge caused by the opening of the exhaust solenoid valve, increase the life of the exhaust solenoid valve, and reduce the spring stiffness and size requirements, save space, and simplify the structure and production difficulty of the pre-control solenoid valve.

[0064] In some embodiments, reference Figure 1 , Figure 1 The exhaust solenoid valve 12 and the pneumatic exhaust valve 13 of the compressed air supply facility 100 are in a closed state, corresponding to the inflation process of the air spring module 300 in the compressed air supply facility 100, refer to Figure 2, Figure 2 The exhaust solenoid valve 12 and the pneumatic exhaust valve 13 of the compressed air supply facility 100 are in a connected state, corresponding to the exhaust process of the air spring module 300 in the compressed air supply facility 100. The pneumatic exhaust valve 13 is opened under the control of the exhaust solenoid valve 12, and the first interface A1 and the second interface A2 and the fourth interface B2 and the third interface B1 are all connected. The compressed air in the air spring passes through the exhaust solenoid valve 12 and flows from A1 to A2, and then passes through the throttle valve 14 to the outlet of the drying section 3. After passing through the drying section 3 to take away the water vapor therein, it flows to the fourth interface B2 through the third interface B1 of the pneumatic exhaust valve 13 and is discharged into the environment. Among them, one end of the throttle valve 14 is connected to the second interface A2, the other end of the throttle valve 14 is connected to one end of the drying section 3, and the other end of the drying section 3 is connected to the third interface B1.

[0065] In some embodiments, a throttle valve 14 and a drying section 3 are sequentially arranged on the air path from the second interface to the third interface. The second interface is connected to the air path between the drying section 3 and the one-way valve 4 through the throttle valve 14. The compressed air supply facility 100 also includes an air compression section 2. The gas inlet of the air compression section 2 is connected to the gas port 1, and the gas outlet of the air compression section 2 is connected to the air spring module 300. The drying section 3 and the one-way valve 4 are sequentially arranged on the air path from the high-pressure gas in the air compression section 2 to the air spring module 300.

[0066] Specifically, the air spring module 300 is connected to the air compression part 2 through the first air circuit, and is connected to the gas port 1 through the second air circuit. The first air circuit is provided with a drying part 3 and a one-way valve 4. The first air circuit is the inflation air circuit of the compressed air supply facility 100. The second air circuit is provided with a pneumatic exhaust valve 13 and an exhaust solenoid valve 12. The second air circuit is the exhaust air circuit of the compressed air supply facility 100. During the exhaust process of the compressed air supply facility 100, the exhaust solenoid valve 12 is connected so that the first interface of the pneumatic exhaust valve 13 is connected with the second interface, and the third interface is connected with the fourth interface. The second interface and the third interface are respectively connected to the two ends of the drying part 3, so that the gas in the air spring module 300 passes through the exhaust solenoid valve 12, the first interface A1, the second interface A2, the drying part 3, the third interface B1 and the fourth interface B2 in sequence, and is discharged from the gas port 1.

[0067] In some embodiments, in the compressed air supply facility 100, the gas port 1 is the only inlet and outlet of the compressed air supply facility 100 connected to the environment; the air compression unit 2 is used to provide compressed air; the drying unit 3 is used to dry the compressed air; the one-way valve 4 is used to prevent the compressed gas from flowing back to the drying unit 3, and the exhaust solenoid valve 12 is a two-position two-way switch solenoid valve. Figure 1During the inflation process of the compressed air supply facility 100, the exhaust solenoid valve 12 is disconnected, the first interface is disconnected from the second interface, the third interface is disconnected from the fourth interface, and the one-way valve 4 is arranged between the drying section 3 and the air spring module 300. The one-way valve 4 is used to allow the gas to flow from the drying section 3 to the air spring module 300 in one direction, so that the gas inhaled by the gas port 1 flows to the air spring module 300 through the air compression section 2, the drying section 3 and the one-way valve 4 in sequence.

[0068] In some embodiments, the interior of the pneumatic exhaust valve 13 chamber always maintains the ambient pressure P0, the exhaust solenoid valve 12 is connected to the first interface A1 of the pneumatic exhaust valve 13, and the first interface A1 is also the pre-control interface of the pneumatic exhaust valve 13. The exhaust solenoid valve 12 provides the pneumatic exhaust valve 13 with a control pressure PS. The internal chamber of the pneumatic exhaust valve 13 is always connected to the surrounding environment through the gas port 1 to ensure that the internal pressure is the ambient pressure P0. During the exhaust period of the compressed air supply facility 100, the control pressure PS is independent of the pressure at the outlet of the drying section 3, and the compressed air pressure from the first interface A1 of the pneumatic exhaust valve 13 has a pre-control effect on the pneumatic exhaust valve 13.

[0069] Among them, the pressure of the drying rear path 21.3 in the compressed air supply facility 100 does not generate force on the pneumatic exhaust valve 13, and the pressure in the drying front path 21.2 has an effective area in the pneumatic exhaust valve 13 that is smaller than the effective area of ​​the exhaust route 22, which can effectively ensure that the pneumatic exhaust valve 13 stably discharges high-pressure gas.

[0070] In some embodiments, the third interface is respectively connected to the gas outlet and the drying section 3, and the pneumatic exhaust valve 13 is used to connect the third interface with the fourth interface when the pre-control pressure at the third interface is greater than the pressure threshold, so that the high-pressure gas at the gas outlet is discharged from the gas port 1.

[0071] refer to Figure 3 , Figure 3This is an air circuit state diagram of a compressed air supply facility 100 applied to an air suspension system 1000 during high-pressure protection, provided by another embodiment of the present invention. The air compression unit 2 is a two-stage compression unit, which includes a first pressure stage 2.1 and a second pressure stage 2.2. The first pressure stage 2.1 is the low-pressure stage of the two-stage compression unit, and the second pressure stage 2.2 is the high-pressure stage of the two-stage compression unit. The exhaust port of the first pressure stage is connected to the air inlet of the second pressure stage. The third interface is connected to the air circuit between the gas outlet of the high-pressure stage and the drying unit 3. The fourth interface is connected to the air circuit between the gas inlet of the low-pressure stage and the gas port 1. When the pre-control pressure at the third interface is greater than the high-pressure protection threshold, the third interface is connected to the fourth interface. So that the gas discharged from the high-pressure stage gas outlet is discharged from the gas port 1. Specifically, the pneumatic exhaust valve 13 starts the high-pressure protection function for the compressed air supply facility 100 during the period when the exhaust solenoid valve 12 is closed. The dry front path 21.2 between the high-pressure stage outlet and the inlet of the drying section 3 provides a pre-control pressure PD for the third interface B1 of the pneumatic exhaust valve 13. During the safety protection process of the compressed air supply facility 100, the first interface A1 and the second interface A2 of the pneumatic exhaust valve 13 are cut off, and only the third interface B1 and the fourth interface B2 are connected. The high-pressure air in the system will be directly discharged into the environment to ensure the safety of the system and prevent the high-pressure gas from entering the air spring module 300 or the gas tank 9, thereby protecting the safety of the system.

[0072] In some embodiments, the first pressure stage 2.1 is connected to the inlet and outlet gas circuit 20 via a first inlet and outlet branch gas circuit 20.1, and the fourth interface B2 is connected to the inlet and outlet gas circuit 20 via a second inlet and outlet branch gas circuit 20.1.

[0073] In some embodiments, the air spring module 300 includes an air spring control component and an air tank 9, the air spring control component includes a pressure sensor 19, multiple air springs and an air spring valve, wherein the pressure sensor 19 is used to detect pressure data and send the pressure data to the controller so that the controller controls the on and off of the air spring valve according to the pressure data. The air spring control component is connected to the air tank 9 through a first reversing solenoid valve 10, and the first reversing solenoid valve 10 is used to control the inflow and outflow of gas in the air tank 9. In order to discharge the compressed air of the air springs (15, 16, 17, 18) in the compressed air supply facility 100 into the environment, the air path where the exhaust solenoid valve 12 is located should be connected to the air path where each air spring valve (5, 6, 7, 8) is located.

[0074] In some embodiments, the air compression section 2 is a two-stage compression section, which includes a first pressure stage and a second pressure stage. The gas inlet is the air inlet of the first pressure stage, and the gas outlet is the exhaust port of the second pressure stage. The gas tank 9 is connected to the air inlet of the first pressure stage through a second reversing solenoid valve 11. The second reversing solenoid valve 11 is used to control the gas in the gas tank 9 to flow to the first pressure stage, and flow to the air spring module 300 after being compressed by the second pressure stage. The gas tank 9 is connected to the gas inlet of the high-pressure stage of the two-stage compression section through the second reversing solenoid valve 11. The second reversing solenoid valve 11 is opened to allow the gas in the gas tank 9 to flow to the air spring module 300 through the high-pressure stage, the drying section 3 and the one-way valve 4 in sequence.

[0075] Among them, the pneumatic exhaust valve 13 of the present invention is also designed with a third pre-control chamber, which corresponds to the third interface B1 of the present application, is connected to the high-pressure stage outlet of the two-stage compression part, and forms a pressure difference with the pressure of the first pre-control chamber to counteract the force of the pre-compression spring. When the exhaust pressure of the compression part is too high, the pneumatic exhaust valve 13 can be directly opened by the pressure difference to achieve high-pressure protection of the suspension system, that is, the compressed air supply facility 100 obtains compressed air with a pressure of PD during the operation of the two-stage compression part, and sends it to the B1 port of the pneumatic exhaust valve 13 through the drying front path 21.2 to open it. At this time, only B1 and B2 ports are connected, and A1 and A2 ports are cut off. When the high-pressure air is discharged to the environment, the safety of the system is ensured.

[0076] refer to Figure 4 , Figure 4 This is a cross-sectional view of a pneumatic exhaust valve 13 in a closed state in a compressed air supply facility 100 provided in another embodiment of the present invention, wherein the pneumatic exhaust valve 13 includes a pneumatic push rod 101, a low-pressure limiting spring 102 and a high-pressure limiting spring 103, the pneumatic push rod 101 is arranged between the first interface and the second interface, and the pneumatic push rod is arranged between the third interface and the fourth interface, and one end of the pneumatic push rod 101 is respectively connected to the low-pressure limiting spring 102 and the high-pressure limiting spring 103.

[0077] refer to Figure 5 , Figure 5 This is a cross-sectional view of the pneumatic exhaust valve 13 in the compressed air supply facility 100 provided in another embodiment of the present invention in a deflated state. During the exhaust process of the compressed air supply facility 100, the pressure of the gas in the air spring module 300 acting on the pneumatic push rod 101 is greater than the preload force and deformation force of the low-pressure limit spring 102 and the high-pressure limit spring 103 acting on the pneumatic push rod, respectively, so that the first interface is connected to the second interface, and the third interface is connected to the fourth interface. Figure 5 correspond Figure 2 The exhaust process.

[0078] In some embodiments, achieving the deflation function of the air suspension system 1000 requires the coordination of the air spring valves 5, 6, 7, and 8, the exhaust solenoid valve 12, and the pneumatic exhaust valve 13. When the compressed gas within the air spring module 300 needs to be discharged, the corresponding air spring valve opens, and the exhaust solenoid valve 12 also needs to reach the open position, delivering the compressed gas to the A1 inlet of the pneumatic exhaust valve 13. Assuming the compressed air pressure within the air spring assembly is PS, when the force exerted by the PS pressure on the lower surface of the pneumatic push rod exceeds the sum of the preload and deformation forces of the low-pressure limit spring and the high-pressure limit spring, the pneumatic push rod pushes upward, connecting ports A1 and A2, and ports B1 and B2. The compressed gas passes through the throttle valve 14, where its pressure drops to ambient pressure. After passing through the drying unit 3 to absorb moisture, it reaches port B1 of the pneumatic exhaust valve 13, and then through port B2 to the gas vent 1, where it is discharged into the environment, thus achieving the system's exhaust function.

[0079] In some embodiments, when the pressure PS within the air spring module 300 is insufficient, the low-pressure limit spring cannot be pushed. This ensures that the compressed air within the air spring module 300 is not completely exhausted, resulting in insufficient support force of the air spring module 300 and damage to the piston within the air spring module 300. To terminate the exhaust process, simply close the pneumatic exhaust valve 13. This stops the compressed air within the air spring module 300 from being fed to port A1 of the pneumatic exhaust valve 13. The pneumatic exhaust valve 13 then automatically closes after exhausting the residual gas between port A1 and the exhaust solenoid valve 12, leaving a certain amount of residual pressure to facilitate rapid decompression and opening for the next exhaust.

[0080] refer to Figure 6 , Figure 6 FIG. 1 is a cross-sectional view of a pneumatic exhaust valve 13 in a compressed air supply facility 100 provided in another embodiment of the present invention in a high-pressure protection state, wherein: Figure 6 correspond Figure 3 During the high-pressure protection process, during the inflation process of the compressed air supply facility 100, when the pressure of the gas in the air compression bag acts on the pneumatic push rod through the third interface, and is greater than the deformation force of the high-pressure limiting spring 103 acting on the pneumatic push rod 101, the third interface is connected to the fourth interface, so that the air suspension system 1000 has a certain self-safety protection capability. When the exhaust pressure P2 generated by the air compression part 2 of the compressed air supply facility 100 is too high, the high-pressure limiting spring 103 will be pushed open through B1 of the pneumatic exhaust valve 13 to connect the B1 port and the B2 port, so that the high-pressure gas is discharged into the environment, preventing the high-pressure gas from entering the air spring module 300 or the gas tank 9, and protecting the safety of the system.

[0081] refer to Figure 7 , Figure 7It is a flowchart of a control method for a compressed air supply facility 100 provided in another embodiment of the present invention. The control method for a compressed air supply facility 100 in the embodiment of the present invention is applied to the compressed air supply facility 100. The compressed air supply facility 100 includes: a gas port 1 connected to the surrounding environment, a pneumatic exhaust valve 13, an exhaust solenoid valve 12 and an air spring module 300. The air spring module 300 is connected to one end of the exhaust solenoid valve 12, the other end of the exhaust solenoid valve 12 is connected to the first interface of the pneumatic exhaust valve 13, the second interface and the third interface of the pneumatic exhaust valve 13 are connected, and the fourth interface of the pneumatic exhaust valve 13 is connected to the gas port 1. The method includes but is not limited to step S710.

[0082] Step S710, controlling the exhaust solenoid valve to communicate, so that the high-pressure gas in the air spring module flows to the pneumatic exhaust valve, so that the first interface is connected to the second interface, and the third interface is connected to the fourth interface, so that the high-pressure gas is discharged from the gas port.

[0083] refer to Figure 8 , Figure 8 This is a flowchart of the control method of the compressed air supply facility 100 provided in another embodiment of the present invention, in which the third interface is connected to the fourth interface. The compressed air supply facility 100 also includes an air compression part 2, and the third interface is connected to the gas outlet of the air compression part 2. The method includes but is not limited to step S810.

[0084] Step S810, control the air compression unit to output high-pressure gas through the gas outlet. When the pre-control pressure at the third interface of the pneumatic exhaust valve is greater than the pressure threshold, the third interface in the pneumatic exhaust valve is connected to the fourth interface, so that the high-pressure gas flows from the fourth interface to the gas port and is discharged.

[0085] In some embodiments, the pneumatic exhaust valve 13 is automatically opened according to the air pressure at the first interface or the third interface without the need for control by a controller.

[0086] In some embodiments, the air spring module 300 includes an air spring control component, the air suspension system 1000 also includes an air tank 9, the air spring control component and the air spring control component are connected to the air tank 9 through a first reversing solenoid valve 10, and the method also includes: controlling the inflow and outflow of gas in the air tank through the first reversing solenoid valve.

[0087] refer to Figure 9 , Figure 9 This is a flow chart of a method for controlling a compressed air supply facility 100 provided in another embodiment of the present invention, in which the second reversing solenoid valve 11 is connected, the air compression section 2 is a two-stage compression section, the two-stage compression section includes a first pressure stage and a second pressure stage, and the air storage tank 9 is connected to the air inlet of the first pressure stage through the second reversing solenoid valve 11. The method includes but is not limited to step S910.

[0088] Step S910: Control the second reversing solenoid valve to be connected, so that the gas in the gas storage tank flows to the second pressure stage, and flows to the air spring module after being compressed by the second pressure stage.

[0089] In some embodiments, the present application further proposes an air suspension system 1000, which is provided with a compressed air supply facility 100 of any one of the above embodiments, so that the air suspension system 1000 has the functions and effects of the compressed air supply facility 100 of any one of the above embodiments.

[0090] In some embodiments, the air suspension system 1000 has a compressed air supply facility 100, an air tank 9 and air springs 15, 16, 17, and 18, wherein the compressed air supply facility 100 is connected to the air tank 9 and the air springs 15, 16, 17, and 18 through the air spring module 300, the air tank 9 is used to store the high-pressure gas in the air spring module 300, and the air springs 15, 16, 17, and 18 are used to adjust the height of the vehicle to a predetermined height under the action of the high-pressure gas in the air spring module 300, thereby improving the driving stability of the vehicle.

[0091] Figure 10 It is a schematic diagram of the structure of the controller provided by an embodiment of the present invention.

[0092] Some embodiments of the present invention provide a controller, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the control method of the compressed air supply facility 100 according to any one of the above embodiments is implemented, for example, the above described method is executed. Figure 7 In the method step S710, Figure 8 Step S810 of the method, Figure 9 Method step S910 in .

[0093] The controller 1010 of the embodiment of the present invention includes one or more processors 1011 and a memory 1012. Figure 10 In the figure, a processor 1011 and a memory 1012 are taken as an example.

[0094] The processor 1011 and the memory 1012 may be connected via a bus or other means. Figure 10 The bus connection is taken as an example.

[0095] The memory 1012 is a non-transitory computer-readable storage medium that can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 1012 may include a high-speed random access memory and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 1012 may optionally include a memory 1012 remotely located relative to the processor 1011. These remote memories may be connected to the controller 1010 via a network. Examples of the aforementioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0096] In some embodiments, when the processor executes the computer program, the control method of the compressed air supply facility 100 of any of the above embodiments is performed at preset intervals.

[0097] Those skilled in the art will understand that Figure 10 The device structure shown in the figure does not constitute a limitation on the controller 1010, and the controller 1010 may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0098] exist Figure 10 In the controller 1010 shown, the processor 1011 can be used to call the control program of the compressed air supply facility 100 stored in the memory 1012, so as to implement the control method of the compressed air supply facility 100.

[0099] Based on the hardware structure of the above-mentioned controller 1010, various embodiments of the compressed air supply facility 100 of the present invention are proposed. At the same time, the non-transient software programs and instructions required to implement the control method of the compressed air supply facility 100 of the above-mentioned embodiment are stored in the memory. When executed by the processor, the control method of the compressed air supply facility 100 of the above-mentioned embodiment is executed.

[0100] In addition, an embodiment of the present invention further provides a compressed air supply facility 100, which includes the above-mentioned controller.

[0101] In some embodiments, since the compressed air supply facility 100 of the embodiment of the present invention has the controller of the above-mentioned embodiment, and the controller of the above-mentioned embodiment can execute the control method of the compressed air supply facility 100 of the above-mentioned embodiment, the specific implementation manner and technical effects of the compressed air supply facility 100 of the embodiment of the present invention can refer to the specific implementation manner and technical effects of the control method of the compressed air supply facility 100 of any of the above-mentioned embodiments.

[0102] The embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. The computer-executable instructions are used to execute the control method of the compressed air supply facility 100 described above. For example, the one or more processors can execute the control method of the compressed air supply facility 100 in the above method embodiment, for example, to execute the above described Figure 7 In the method step S710, Figure 8 Step S810 of the method, Figure 9 Method step S910 in .

[0103] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network nodes. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0104] Those skilled in the art will appreciate that all or some of the steps and systems in the method disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include a computer-readable storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer-readable storage medium is included in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data) and is volatile and non-volatile, removable, and non-removable. Computer-readable storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technology, CD-ROM, digital versatile disks (DVD), or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0105] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A compressed air supply facility, applied to an air suspension system, characterized in that: The compressed air supply facility includes: a gas port communicating with the surrounding environment, a pneumatic exhaust valve, an exhaust solenoid valve and an air spring module; One end of the exhaust solenoid valve is connected to the air spring module, the other end is connected to the first interface of the pneumatic exhaust valve, the second interface and the third interface of the pneumatic exhaust valve are connected, and the fourth interface of the pneumatic exhaust valve is connected to the gas port; in: A throttle valve and a drying part are provided on the gas path between the second interface and the third interface; It also includes an air compression unit and a one-way valve, wherein the gas inlet of the air compression unit is connected to the gas port, the gas outlet of the air compression unit is connected to one end of the drying unit, and the other end of the drying unit is connected to the air spring module through the one-way valve; The third interface is connected to the gas outlet and the drying part respectively, and the pneumatic exhaust valve is used to connect the third interface and the fourth interface when the pre-control pressure at the third interface is greater than the pressure threshold; When the air spring module needs to be inflated, the exhaust solenoid valve is disconnected, the first interface is disconnected from the second interface, the third interface is disconnected from the fourth interface, and the gas sucked in by the gas port passes through the air compression part, the drying part and the one-way valve in sequence to flow to the air spring module; When the air spring module needs to be exhausted, the exhaust solenoid valve is connected so that the first interface of the pneumatic exhaust valve is connected to the second interface, and the third interface is connected to the fourth interface. The gas in the air spring module passes through the exhaust solenoid valve, the first interface, the second interface, the throttle valve, the drying part, the third interface and the fourth interface in sequence, and is discharged from the gas outlet; When the pre-control pressure at the third interface is greater than the pressure threshold, the pneumatic exhaust valve connects the third interface and the fourth interface, the first interface and the second interface are disconnected, and the high-pressure gas discharged from the gas outlet of the air compression part passes through the third interface and the fourth interface in sequence and is discharged from the gas port.

2. The compressed air supply facility according to claim 1, characterized in that The air spring module includes an air spring control assembly, which includes multiple air spring valves. The air suspension system also includes an air tank and multiple air springs. The air spring valves are connected to the air springs, and the air spring control assembly is connected to the air tank via a first reversing solenoid valve.

3. The compressed air supply facility according to claim 2, characterized in that The air compression section is a two-stage compression section, which includes a first pressure stage and a second pressure stage. The gas inlet is the air inlet of the first pressure stage, and the gas outlet is the exhaust port of the second pressure stage. The exhaust port of the first pressure stage is connected to the air inlet of the second pressure stage, and the gas storage tank is connected to the air inlet of the second pressure stage through a second reversing solenoid valve.

4. The compressed air supply facility according to any one of claims 1 to 3, characterized in that: The interior of the pneumatic exhaust valve is connected to the gas port, and the pneumatic exhaust valve includes a pneumatic push rod, a low-pressure limiting spring and a high-pressure limiting spring. The pneumatic push rod is arranged between the first interface and the second interface, and the pneumatic push rod is arranged between the third interface and the fourth interface. One end of the pneumatic push rod is respectively connected to the low-pressure limiting spring and the high-pressure limiting spring. When the pressure of the high-pressure gas acting on the pneumatic push rod at the first interface is greater than the preload force and deformation force of the low-pressure limiting spring and the high-pressure limiting spring acting on the pneumatic push rod respectively, the first interface is connected to the second interface, and the third interface is connected to the fourth interface.

5. The compressed air supply facility according to claim 4, characterized in that When the pressure of the high-pressure gas acting on the pneumatic push rod at the third interface is greater than the deformation force of the high-pressure limiting spring acting on the pneumatic push rod, the third interface is connected to the fourth interface.

6. A method for controlling a compressed air supply facility, characterized in that: The method is implemented by using a compressed air supply facility and applied to an air suspension system, wherein the compressed air supply facility includes: a gas port connected to the surrounding environment, a pneumatic exhaust valve, an exhaust solenoid valve and an air spring module, one end of the exhaust solenoid valve is connected to the air spring module, and the other end is connected to the first interface of the pneumatic exhaust valve, the second interface of the pneumatic exhaust valve is connected to the third interface, and the fourth interface of the pneumatic exhaust valve is connected to the gas port, and a throttle valve and a drying part are provided on the air path between the second interface and the third interface; the compressed air supply facility also includes an air compressor and a one-way valve, the gas inlet of the air compressor is connected to the gas port, the gas outlet of the air compressor is connected to one end of the drying part, and the other end of the drying part is connected to the air spring module through the one-way valve; the third interface is connected to the gas outlet and the drying part respectively, and the pneumatic exhaust valve is used to connect the third interface with the fourth interface when the pre-control pressure at the third interface is greater than the pressure threshold; the method includes: When the air spring module needs to be inflated, the exhaust solenoid valve is disconnected, the first interface is disconnected from the second interface, the third interface is disconnected from the fourth interface, and the gas sucked in by the gas port passes through the air compression part, the drying part and the one-way valve in sequence to flow to the air spring module; When the air spring module needs to be exhausted, the exhaust solenoid valve is controlled to be connected, so that the high-pressure gas in the air spring module flows to the pneumatic exhaust valve, so that the first interface is connected with the second interface, and the third interface is connected with the fourth interface, so that the high-pressure gas passes through the exhaust solenoid valve, the first interface, the second interface, the throttle valve, the drying part, the third interface and the fourth interface in sequence, and is discharged from the gas outlet; When the pre-control pressure at the third interface is greater than the pressure threshold, the pneumatic exhaust valve connects the third interface and the fourth interface, the first interface and the second interface are disconnected, and the high-pressure gas discharged from the gas outlet of the air compression part passes through the third interface and the fourth interface in sequence and is discharged from the gas port.

7. The method for controlling a compressed air supply facility according to claim 6, wherein: The air spring module includes an air spring control assembly, the air suspension system also includes an air tank, the air spring control assembly is connected to the air tank via a first reversing solenoid valve, and the method further includes: The inflow and outflow of gas in the gas storage tank is controlled by the first reversing solenoid valve.

8. The compressed air supply facility control method according to claim 7, characterized in that: The air compression unit is a two-stage compression unit, which includes a first pressure stage and a second pressure stage. The air storage tank is connected to the air inlet of the second pressure stage via a second reversing solenoid valve. The method further includes: The second reversing solenoid valve is controlled to be connected so that the gas in the gas storage tank flows to the second pressure stage, and then flows to the air spring module after being compressed by the second pressure stage.

9. An air suspension system, characterized in that: Comprising the compressed air supply facility according to any one of claims 1 to 5.

10. A controller, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for controlling a compressed air supply facility according to any one of claims 6 to 8 is implemented.

11. A computer-readable storage medium, characterized in that Computer-executable instructions are stored, and the computer-executable instructions are used to execute the compressed air supply facility control method according to any one of claims 6 to 8.

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