Air suspension control system and control method thereof

Abstract

The invention relates to an air suspension control system and a control method thereof, and is applied to the technical field of air suspensions.The air suspension control system comprises a controller, a valve body, an air storage tank, a one-way circulation motor and a maintenance unit arranged outside the valve body, and the maintenance unit comprises an exhaust valve, a high-pressure dryer and a flow limiting valve; the maintenance unit is connected to the valve body through an external anti-explosion pipeline; the air storage tank is used for storing air; and the controller is used for opening the first reversing valve in the valve body when the high-pressure dryer is subjected to drying regeneration so as to control air in the air storage tank to flow into the atmospheric environment through the first reversing valve, the external anti-explosion pipeline, the flow limiting valve, the high-pressure dryer and the exhaust valve in sequence, and the air does not flow through an internal air path of the valve body. When the dryer is regenerated, corrosion of high-humidity gas to gas paths and parts in the valve body can be avoided, and replacement and maintenance are convenient.

Description

Technical Field

[0001] The present application relates to the technical field of air suspension, and in particular to an air suspension control system and a control method thereof. Background Art

[0002] The air suspension system's dryer gradually becomes saturated during continuous operation, significantly reducing drying efficiency and impacting the proper functioning and long-term stability of the air suspension. Regular regeneration of the dryer is crucial to avoid system performance degradation and potential failure.

[0003] In the prior art, the air suspension exhaust valve and dryer are placed inside the valve body. When the dryer regenerates, it produces high-humidity air that flows through the exhaust valve, causing corrosion and damage to the exhaust valve and the valve body's air path. Furthermore, replacement is difficult, complicating maintenance and normal use of the equipment. Summary of the Invention

[0004] In order to solve the above technical problems, the present application provides an air suspension control system and a control method thereof.

[0005] According to a first aspect of the present application, an air suspension control system is provided, comprising: a controller, a valve body, an air storage tank, a one-way flow motor, and a maintenance unit disposed outside the valve body, the maintenance unit comprising: an exhaust valve, a high-pressure dryer, and a flow limiting valve, the maintenance unit being connected to the valve body via an external explosion-proof pipe;

[0006] The air storage tank is used to store air;

[0007] The controller is configured to open the first reversing valve in the valve body when drying and regenerating the high-pressure dryer, so as to control the air in the air storage tank to flow into the atmosphere in sequence through the first reversing valve, the external explosion-proof pipe, the flow limiting valve, the high-pressure dryer, and the exhaust valve, without flowing through the internal air path of the valve body.

[0008] Optionally, the air suspension control system further comprises: a load valve; one end of the load valve is connected to the motor, and the other end is connected to an external load interface;

[0009] The controller is used to obtain the pressure of the air tank when inflating the external load, and determine the air path used for inflating the external load based on the pressure of the air tank and the type of the external load, and control the air to enter the external load through the motor and load valve in the air path.

[0010] Optionally, the controller is specifically used to open the second reversing valve in the valve body when it is determined that the air circuit used for inflating the external load is the air tank circuit, so as to control the air in the air tank to enter the external load through the second reversing valve, the motor and the load valve in sequence.

[0011] Optionally, the air suspension control system further comprises: a low-pressure dryer disposed outside the valve body;

[0012] The controller is specifically used to control the air in the atmosphere to enter the external load in sequence through the low-pressure dryer, the motor and the load valve when it is determined that the air path used to inflate the external load is the atmospheric air path.

[0013] Optionally, the controller is specifically used to determine that the air path used for inflating the external load is the atmospheric air path when the pressure of the air tank is less than a preset pressure; when the pressure of the air tank is greater than or equal to the preset pressure and the type of the external load is a preset type, determine that the air path used for inflating the external load is the air tank air path; when the pressure of the air tank is greater than or equal to the preset pressure and the type of the external load is not a preset type, determine that the air path used for inflating the external load is the air tank air path and the atmospheric air path.

[0014] Optionally, the controller is further configured to set the rotational speed of the motor according to the type of the external load when inflating the external load, so as to control the inflation speed of the external load by the rotational speed of the motor.

[0015] Optionally, the air suspension control system further comprises: a temperature, pressure and humidity sensor;

[0016] The controller is further configured to open the third reversing valve in the valve body during the process of venting the gas tank, or during the process of inflating the external load using the gas line of the gas tank, or during the process of inflating the external load using the atmospheric gas line;

[0017] The temperature, pressure and humidity sensor is used to monitor the temperature, humidity and pressure in the gas path when the third reversing valve is open, and feed the monitored temperature, humidity and pressure back to the controller;

[0018] The controller is further configured to perform a backflush operation when it is determined that the humidity of the gas is greater than a preset threshold.

[0019] Optionally, the diameters of the pipe connecting the external load and the load valve and the diameters of the pipe connecting the load valve and the motor are adaptively designed according to the maximum inflation flow of the external load, and the inner wall of the air path is smooth.

[0020] Optionally, a protective frame is provided outside the valve body, and the protective frame is used to fix the maintenance unit.

[0021] According to a second aspect of the present application, an air suspension control method is provided, which is applied to the air suspension control system described in the first aspect. The method includes:

[0022] When the high-pressure dryer is dried and regenerated, the first reversing valve in the valve body is opened to control the air in the air storage tank to flow into the atmosphere through the first reversing valve, the external explosion-proof pipe, the flow limiting valve, the high-pressure dryer and the exhaust valve in sequence, and not to flow through the internal air path of the valve body.

[0023] Optionally, the method further includes:

[0024] When inflating an external load, the pressure of the air tank is obtained, and the air path used for inflating the external load is determined according to the pressure of the air tank and the type of the external load, and the air is controlled to enter the external load through the motor and load valve in the air path.

[0025] Optionally, the control air enters the external load through the motor and the load valve in the air circuit, comprising:

[0026] When it is determined that the air circuit used for inflating the external load is the air tank circuit, the second reversing valve in the valve body is opened to control the air in the air tank to enter the external load through the second reversing valve, the motor and the load valve in sequence.

[0027] Optionally, the control air enters the external load through the motor and the load valve in the air circuit, comprising:

[0028] When it is determined that the air path used for inflating the external load is the atmospheric air path, the air in the atmosphere is controlled to enter the external load through the low-pressure dryer, the motor and the load valve in sequence.

[0029] Optionally, determining the air path used for inflating the external load according to the pressure of the air storage tank and the type of the external load includes:

[0030] When the pressure of the gas tank is lower than the preset pressure, it is determined that the gas path used for external load inflation is the atmospheric gas path;

[0031] When the pressure of the gas tank is greater than or equal to the preset pressure and the type of the external load is the preset type, determining that the gas path used for inflating the external load is the gas path of the gas tank;

[0032] When the pressure of the gas tank is greater than or equal to the preset pressure and the type of the external load is not the preset type, it is determined that the gas path used for inflating the external load is the gas tank gas path and the atmospheric gas path.

[0033] Optionally, the method further includes:

[0034] When inflating an external load, the rotation speed of the motor is set according to the type of the external load, so as to control the inflation speed of the external load by the rotation speed of the motor.

[0035] Optionally, the method further includes:

[0036] During the process of venting the gas storage tank, or during the process of inflating the external load using the gas circuit of the gas storage tank, or during the process of inflating the external load using the atmospheric gas circuit, the third reversing valve in the valve body is opened to monitor the temperature, humidity and pressure in the gas circuit through the temperature, pressure and humidity sensor; when it is determined that the humidity of the gas is greater than a preset threshold, a backflush operation is performed.

[0037] The technical solution provided by the embodiments of the present application has the following advantages compared with the prior art:

[0038] The air suspension control system's valve body is equipped with a maintenance unit, which includes an exhaust valve, a high-pressure dryer, and a flow-limiting valve. This maintenance unit is connected to the valve body via an external explosion-proof pipe. Since the exhaust valve and high-pressure dryer are independently connected via the external explosion-proof pipe and are located outside the valve body, the high-humidity gas generated during regeneration of the high-pressure dryer is discharged directly into the atmosphere through the external explosion-proof pipe, connecting the flow-limiting valve, the high-pressure dryer, and the exhaust valve. This prevents high-humidity gas from corroding the internal air path and components of the valve body, extending component life and reducing the risk of system failure due to corrosion. Furthermore, the exhaust valve and high-pressure dryer are located outside the valve body, allowing for direct inspection or replacement without disassembly of the valve body. This solves the problem of inconvenient replacement of internal valve body components in traditional solutions and significantly reduces maintenance costs and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0041] Figure 1 This is the air circuit diagram of the air suspension control system in the embodiment of the present application;

[0042] Figure 2 This is a drying and regeneration gas circuit diagram of the air suspension control system in an embodiment of the present application;

[0043] Figure 3This is an external load inflation gas circuit diagram of the air suspension control system in an embodiment of the present application;

[0044] Figure 4 This is another external load inflation gas circuit diagram of the air suspension control system in the embodiment of the present application;

[0045] Figure 5 This is a flow chart of the air suspension control method in an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0047] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0048] Figure 1 This is a gas circuit diagram of the air suspension control system in an embodiment of the present application. The air suspension control system includes a controller (not shown), a valve body 101, an air tank 102, a one-way flow motor 103, and a maintenance unit 104 disposed externally to the valve body 101. The maintenance unit 104 includes an exhaust valve 1042, a high-pressure dryer 1044, and a flow limiting valve 1046. The maintenance unit 104 is connected to the valve body 101 via an external explosion-proof pipe. The external explosion-proof pipe interface can be designed as a quick-disassembly structure, balancing structural compactness and installation flexibility while maintaining system functionality.

[0049] The flow limiting valve 1046 can be located outside the high-pressure dryer 1044 or inside it. Optionally, a protective frame can be provided outside the valve body 101 to secure the maintenance unit 104. A quick-connect connector can be provided on the connecting pipe between the exhaust valve 1042 and the high-pressure dryer 1044, allowing for rapid assembly and disassembly and maintenance of the exhaust valve 1042 and the high-pressure dryer 1044. The air tank 102 is used to store air.

[0050] The air suspension control system may also include a reversing valve 105, an air spring valve 106, an air spring 107, and a temperature, pressure, and humidity sensor 108. The reversing valve 105 comprises a first reversing valve 1051, a second reversing valve 1052, a third reversing valve 1053, and a fourth reversing valve 1054. The reversing valve 105 and air spring valve 106 within the valve body 101 form the main air circuit control structure, which is completely separated from the external exhaust valve and the regeneration air circuit of the high-pressure dryer.

[0051] The controller can monitor the dew point in the gas storage tank 102 and determine whether to perform drying and regeneration on the high-pressure dryer 1044 based on the dew point. For example, if the dew point in the gas storage tank 102 is detected to be high, it is considered that the drying efficiency of the high-pressure dryer 1044 is low and the high-pressure dryer 1044 needs to be dried and regenerated. Figure 2 As shown, when drying and regenerating the high-pressure dryer 1044, the controller opens the first reversing valve 1051 within the valve body 101. Using a pressure differential, the air in the air storage tank 102 is directed to flow into the atmosphere through the first reversing valve 1051, the external explosion-proof pipe, the flow limiting valve 1046, the high-pressure dryer 1044, and the exhaust valve 1042, avoiding the flow through the internal air path of the valve body 101. This prevents high-humidity gas from corroding the internal air path and components of the valve body, thereby extending component life. The exhaust valve and high-pressure dryer are located outside the valve body, facilitating replacement and maintenance.

[0052] Optionally, the controller is further configured to open the third reversing valve 1053 in the valve body during the process of venting the gas storage tank 102. When the third reversing valve 1053 is opened, the air flowing through the first reversing valve 1051 can flow through the third reversing valve 1053 to the temperature, pressure and humidity sensor 108. The temperature, pressure and humidity sensor 108 is configured to monitor the temperature, humidity and pressure in the gas circuit when the third reversing valve 1053 is opened, and to feed back the monitored temperature, humidity and pressure to the controller. In this way, the temperature, humidity and pressure in the gas circuit during the drying and regeneration process can be monitored in real time. The controller is configured to perform a backflush operation when it is determined that the humidity of the gas is greater than a preset threshold.

[0053] Optionally, the air suspension control system further includes: a load valve, which is a solenoid valve for inflating an external load, one end of which is connected to the motor 103 and the other end is connected to the external load interface; the load valve is used to provide an inflation function for an external load (such as a tire, a seat, etc.) and control the on-off of the external air circuit. Figure 3 As shown, the air suspension control system further includes a load valve 109, one end of which is connected to the motor 103 and the other end is connected to the interface of the external load 110. Optionally, the diameters of the pipes connecting the external load to the load valve and the pipe connecting the load valve to the motor can be adapted to the maximum inflation flow rate of the external load, and the inner wall of the air path is smooth to reduce gas flow resistance.

[0054] The controller is configured to obtain the pressure of the gas tank 102 when inflating the external load 110, determine the air path used to inflate the external load 110 based on the pressure of the gas tank 102 and the type of the external load 110, and control the flow of air into the external load via the motor and load valve in the air path. In the embodiment of the present application, the air source for inflating the external load includes the atmosphere and the air in the gas tank 102. The air path to be used can be selected based on the pressure of the gas tank 102 and the type of the external load 110. The air paths used can include: a separate atmospheric air path, a separate gas tank air path, or a combination of a gas tank air path and an atmospheric air path.

[0055] In some embodiments, the controller is specifically used to determine that the air circuit used for inflating the external load is the atmospheric air circuit when the pressure of the air tank is less than the preset pressure, that is, when the air in the air tank is less, the atmosphere can be used to inflate the external load 110 first. Otherwise, when the pressure of the air tank is greater than or equal to the preset pressure, the air circuit used can be further selected in combination with the type of external load, that is, different external loads can meet different air supply requirements. For example, when the type of the external load is a preset type, the air circuit used for inflating the external load is determined to be the air tank air circuit; when the pressure of the air tank is greater than or equal to the preset pressure and the type of the external load is not a preset type, the air circuit used for inflating the external load is determined to be the air tank air circuit and the atmospheric air circuit. For example, the air tank air circuit can be used first, and then the atmospheric air circuit; or, the atmospheric air circuit can be used first, and then the air tank air circuit.

[0056] like Figure 3 As shown, the controller is specifically configured to, upon determining that the air path used for inflating the external load is the air tank path, open the second reversing valve 1052 within the valve body 101 to control the flow of air from the air tank 102 to the external load 110 via the second reversing valve 1052, the motor 103, and the load valve 109. The controller is also configured to open the third reversing valve 1053 within the valve body 101 during the process of inflating the external load using the air tank path. As can be seen, air flowing through the motor 103 can pass through the high-pressure dryer 1044, the flow limiting valve 1046, and the third reversing valve 1053 to the temperature, pressure, and humidity sensor 108. The temperature, pressure, and humidity sensor 108 is configured to monitor the temperature, humidity, and pressure in the air path when the third reversing valve 1053 is open and to feed the monitored temperature, humidity, and pressure back to the controller. The controller is also configured to perform a backflush operation upon determining that the humidity of the gas exceeds a preset threshold.

[0057] like Figure 4As shown, the air suspension control system also includes a low-pressure dryer 111 disposed outside the valve body. When low-pressure dryer 111 is configured to inflate an external load, it minimizes the risk of corrosion damage to internal metal components caused by the high-humidity atmospheric air supply not being dried during intake. The controller is specifically configured to, upon determining that the air path used for inflating the external load is the atmospheric air path, control the flow of atmospheric air through the low-pressure dryer 111, the motor 103, and the load valve 109 to enter the external load 110. The controller is also configured to open the third reversing valve 1053 within the valve body during the process of inflating the external load using the atmospheric air path. As can be seen, air flowing through the motor 103 can pass through the high-pressure dryer 1044, the flow limiting valve 1046, and the third reversing valve 1053 to the temperature, pressure, and humidity sensor 108. The temperature, pressure, and humidity sensor 108 is configured to monitor the temperature, humidity, and pressure in the air path when the third reversing valve 1053 is open, and to feed the monitored temperature, humidity, and pressure back to the controller. The controller is configured to perform a backflush operation when it is determined that the humidity of the gas is greater than a preset threshold.

[0058] Optionally, the controller is also used to set the motor speed based on the type of external load when inflating the external load. This allows the motor speed to control the inflation speed of the external load, thereby matching the inflation speed requirements of different external loads. Temperature, pressure, and humidity sensors monitor air path parameters in real time. Combined with the load valve and motor speed control, this allows for intelligent dynamic adjustment of the external load inflation process, ensuring stable and precise inflation.

[0059] In the embodiment of the present application, an external load inflation function is added. Through two air paths and motor speed control, the differentiated inflation volume and speed requirements of multiple components of the vehicle (such as tires, seats, etc.) can be met, expanding the application scenarios of the air suspension system.

[0060] The present application also provides an air suspension control method, which is applied to the above-mentioned air suspension control system. Figure 5 , which may include the following steps:

[0061] In step S502, when the high-pressure dryer is dried and regenerated, the first reversing valve in the valve body is opened to control the air in the gas storage tank to flow into the atmosphere through the first reversing valve, the external explosion-proof pipe, the flow limiting valve, the high-pressure dryer and the exhaust valve in sequence, and not to flow through the internal gas path of the valve body.

[0062] Optionally, the air suspension control method further includes:

[0063] When inflating an external load, obtain the pressure of the air tank, and determine the air path used to inflate the external load according to the pressure of the air tank and the type of the external load, and control the air to enter the external load through the motor and load valve in the air path.

[0064] Optionally, control air is passed through the motor and load valve in the air circuit to an external load, including:

[0065] When it is determined that the air path used for inflating the external load is the air tank air path, the second reversing valve in the valve body is opened to control the air in the air tank to enter the external load through the second reversing valve, the motor and the load valve in sequence.

[0066] Optionally, control air is passed through the motor and load valve in the air circuit to an external load, including:

[0067] When it is determined that the air path used for inflating the external load is the atmospheric air path, the air in the atmosphere is controlled to enter the external load through the low-pressure dryer, the motor and the load valve in sequence.

[0068] Optionally, the gas path used for inflating the external load is determined based on the pressure of the gas storage tank and the type of the external load, including:

[0069] When the pressure of the gas tank is lower than the preset pressure, it is determined that the gas path used for external load inflation is the atmospheric gas path;

[0070] When the pressure of the gas tank is greater than or equal to the preset pressure and the type of the external load is the preset type, determining that the gas path used for inflating the external load is the gas path of the gas tank;

[0071] When the pressure of the gas tank is greater than or equal to the preset pressure and the type of the external load is not the preset type, it is determined that the gas path used for inflating the external load is the gas tank gas path and the atmospheric gas path.

[0072] Optionally, the air suspension control method further includes:

[0073] When inflating an external load, the speed of the motor is set according to the type of the external load to control the inflation speed of the external load through the speed of the motor.

[0074] Optionally, the air suspension control method further includes:

[0075] During the process of venting the gas tank, or during the process of using the gas tank gas line to inflate an external load, or during the process of using the atmospheric gas line to inflate an external load, the third reversing valve in the valve body is opened to monitor the temperature, humidity and pressure in the gas line through the temperature, pressure and humidity sensors. When it is determined that the humidity of the gas is greater than a preset threshold, a backflush operation is performed.

[0076] The specific details of each step in the above method have been described in detail in the corresponding system, so they will not be repeated here.

[0077] An embodiment of the present application further provides an electronic device, comprising: a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to execute the above-mentioned air suspension control method.

[0078] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the above-mentioned air suspension control method is implemented.

[0079] It should be noted that the computer-readable storage medium shown in this application can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, device or device. The program code contained on the computer-readable storage medium can be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, radio frequency, etc., or any suitable combination thereof.

[0080] In an embodiment of the present application, a computer program product is further provided. When the computer program product is run on a computer, the computer is caused to execute the above-mentioned air suspension control method.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0082] The foregoing description is intended only to provide specific embodiments of the present application, which will enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. An air suspension control system, characterized in that: include: A controller, a valve body, a gas storage tank, a one-way flow motor, and a maintenance unit arranged outside the valve body, the maintenance unit including: an exhaust valve, a high-pressure dryer, and a flow limiting valve, the maintenance unit being connected to the valve body via an external explosion-proof pipe; The air storage tank is used to store air; The controller is configured to open the first reversing valve in the valve body when drying and regenerating the high-pressure dryer, so as to control the air in the air storage tank to flow into the atmosphere in sequence through the first reversing valve, the external explosion-proof pipe, the flow limiting valve, the high-pressure dryer, and the exhaust valve, without flowing through the internal air path of the valve body.

2. The air suspension control system according to claim 1, characterized in that: The air suspension control system further includes: a load valve; one end of the load valve is connected to the motor, and the other end is connected to the external load interface; The controller is used to obtain the pressure of the air tank when inflating the external load, and determine the air path used for inflating the external load based on the pressure of the air tank and the type of the external load, and control the air to enter the external load through the motor and load valve in the air path.

3. The air suspension control system according to claim 2, characterized in that: The controller is specifically used to open the second reversing valve in the valve body when it is determined that the air circuit used for inflating the external load is the air tank circuit, so as to control the air in the air tank to enter the external load through the second reversing valve, the motor and the load valve in sequence.

4. The air suspension control system according to claim 2, characterized in that: The air suspension control system further includes: a low-pressure dryer disposed outside the valve body; The controller is specifically used to control the air in the atmosphere to enter the external load in sequence through the low-pressure dryer, the motor and the load valve when it is determined that the air path used to inflate the external load is the atmospheric air path.

5. The air suspension control system according to claim 2, characterized in that: The controller is specifically used to determine that the air path used for inflating the external load is the atmospheric air path when the pressure of the air storage tank is less than a preset pressure; when the pressure of the air storage tank is greater than or equal to the preset pressure and the type of the external load is a preset type, the air path used for inflating the external load is the air storage tank air path; when the pressure of the air storage tank is greater than or equal to the preset pressure and the type of the external load is not a preset type, the air path used for inflating the external load is the air storage tank air path and the atmospheric air path.

6. The air suspension control system according to claim 2, characterized in that: The controller is further configured to set the rotation speed of the motor according to the type of the external load when inflating the external load, so as to control the inflation speed of the external load by the rotation speed of the motor.

7. The air suspension control system according to claim 1, characterized in that: The air suspension control system further includes: a temperature, pressure and humidity sensor; The controller is further configured to open the third reversing valve in the valve body during the process of venting the gas tank, or during the process of inflating the external load using the gas line of the gas tank, or during the process of inflating the external load using the atmospheric gas line; The temperature, pressure and humidity sensor is used to monitor the temperature, humidity and pressure in the gas path when the third reversing valve is open, and feed the monitored temperature, humidity and pressure back to the controller; The controller is further configured to perform a backflush operation when it is determined that the humidity of the gas is greater than a preset threshold.

8. The air suspension control system according to claim 2, characterized in that: The diameters of the pipe connecting the external load and the load valve and the diameters of the pipe connecting the load valve and the motor are adaptively designed according to the maximum inflation flow of the external load, and the inner wall of the air path is smooth.

9. The air suspension control system according to claim 1, characterized in that: A protection frame is provided outside the valve body, and the protection frame is used to fix the maintenance unit.

10. An air suspension control method, characterized in that: Applied to the air suspension control system according to any one of claims 1 to 9, the method comprises: When the high-pressure dryer is dried and regenerated, the first reversing valve in the valve body is opened to control the air in the air storage tank to flow into the atmosphere through the first reversing valve, the external explosion-proof pipe, the flow limiting valve, the high-pressure dryer and the exhaust valve in sequence, and not to flow through the internal air path of the valve body.

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