Air supply unit and air supply unit control method

Abstract

The invention relates to the technical field of automobiles, in particular to an air supply unit and an air supply unit control method.The air supply unit comprises a valve shell, a filtering part, a first drying part, an air supplementing pipeline, an exhaust pipeline, a low-pressure input pipeline, a high-pressure output pipeline, a pressurizing part and an air spring butt joint assembly; the valve shell is sequentially divided into a gas filtering area, a pressurization area and a gas path control area in the first direction, the valve shell is provided with a gas suction port, a gas inlet cavity, a gas exhaust port and an inner circulation cavity, the gas inlet cavity and the inner circulation cavity are both arranged in the gas filtering area, the gas suction port is communicated with the gas supplementing pipeline through the gas inlet cavity, and the gas exhaust pipeline is communicated with the atmosphere through the gas exhaust port. The air supply pipeline, the exhaust pipeline, the low-pressure input pipeline, the high-pressure output pipeline, the air inlet cavity and the inner circulation cavity are all integrally arranged in the valve shell. According to the air supply unit and the air supply unit control method, the drying efficiency of the first drying part is improved, and the maintenance and repair cost of the valve body module is reduced.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an air supply unit and an air supply unit control method. Background Art

[0002] As an important part of the active suspension system of automobiles, air suspension consists of multiple components such as air supply unit, air spring, shock absorbing and damping device. With the continuous advancement of automobile technology and the improvement of consumers' requirements for vehicle comfort and handling, air suspension systems have been widely used. As the core component of the air suspension system, the air supply unit is responsible for compressing and filling the air into the air spring to achieve the stiffness and damping adjustment function of the air suspension. Therefore, the performance and efficiency of the air supply unit have an important impact on the overall performance of the air suspension system.

[0003] The air supply unit usually includes multiple key components, such as air compressors, air tanks, control valves, sensors, etc. In some existing air suspension systems, these components are often arranged in a dispersed manner and lack compactness. This not only increases the volume and weight of the system, but may also lead to an increase in connecting components, increasing system complexity and the risk of failure. The air supply unit requires a large number of connecting components (such as pipes, joints, etc.) to connect the various components. These connecting components not only increase the complexity and cost of the system, but may also become potential points of system failure. For example, looseness or leakage of connecting components may lead to insufficient or failure of air supply, thereby affecting the normal operation of the air suspension. Summary of the invention

[0004] The purpose of the present application is to provide an air supply unit and an air supply unit control method, so as to solve the problem that in some existing air suspension systems, these components are often dispersed and lack compactness. This not only increases the volume and weight of the system, but also may lead to an increase in connecting components, increasing the complexity of the system and the risk of failure. The air supply unit requires a large number of connecting components (such as pipes, joints, etc.) to connect the various components. These connecting components not only increase the complexity and cost of the system, but also may become potential points of system failure. For example, looseness or leakage of connecting components may lead to insufficient or failure of air supply, thereby affecting the normal operation of the air suspension.

[0005] According to a first aspect of the present application, an air supply unit is provided, comprising a valve body module and an electrical control module, wherein the valve body module comprises a valve housing, a filter portion, a first drying portion, an air supply pipeline, an exhaust pipeline, a low-pressure input pipeline, a high-pressure output pipeline, a pressurizing portion, and an air spring docking assembly;

[0006] The valve housing is divided into a gas filtering area, a pressurizing area and a gas path control area in sequence along a first direction. The valve housing is provided with an air intake port, an air intake chamber, an air exhaust port and an inner circulation chamber. The air intake chamber for arranging the filter unit and the inner circulation chamber for arranging the first drying unit are both arranged in the gas filtering area. The air intake port is communicated with the air supply pipeline via the air intake chamber, and the air exhaust pipeline is communicated with the atmosphere via the air exhaust port.

[0007] The supercharging unit is arranged in the supercharging area, the air supply pipeline and the low-pressure input pipeline are respectively connected to the low-pressure interface of the supercharging unit, and the exhaust pipeline and the high-pressure output pipeline are respectively connected to the high-pressure interface of the supercharging unit;

[0008] The air spring docking assembly is arranged in the air circuit control area, the electrical control module is arranged at one end of the valve body module in the first direction where the air circuit control area is located, and the air supply pipeline and the exhaust pipeline are respectively docked with the air spring via the air spring docking assembly;

[0009] Among them, the air supply pipeline, the exhaust pipeline, the low-pressure input pipeline, the high-pressure output pipeline, the air intake chamber and the internal circulation chamber are all integrally arranged in the valve housing.

[0010] Preferably, it further comprises a motor and a suspension part, wherein the motor is drivingly connected to the boosting part, and the suspension part and the motor are respectively arranged on both sides of the valve housing in a second direction, and the second direction is perpendicular to the first direction.

[0011] Preferably, it also includes a pressure differential valve;

[0012] The differential pressure valve connects the high pressure interface and the low pressure interface;

[0013] And / or, the pressure differential valve controls the high pressure interface to communicate with the atmosphere outside the valve housing.

[0014] Preferably, the air spring docking assembly comprises an air spring valve, and the air spring is connected to the valve body module via the air spring valve to control the flow of gas into or out of the air spring;

[0015] The number of the air springs and the number of the air spring valves are both multiple, and the air springs and the air spring valves are arranged in a one-to-one correspondence.

[0016] Preferably, the air supply unit further comprises an air storage tank in communication with the valve body module;

[0017] The valve body module also includes:

[0018] A first branch, connecting the empty spring docking assembly and the high-pressure output pipeline, wherein the first branch is provided with a first switching valve;

[0019] A second branch is connected to the air spring docking assembly and the air supply pipeline, and the second branch is provided with a second switching valve;

[0020] A third branch, connecting the second branch and the gas storage tank, wherein the third branch is provided with a third switching valve;

[0021] The fourth branch is connected to the high-pressure output pipeline and the gas storage tank, and the fourth branch is provided with a fourth switching valve.

[0022] Preferably, the air supply unit further comprises an air storage tank in communication with the valve body module;

[0023] The valve body module also includes a first passage, a second passage, a third passage, a fourth passage, a first two-position three-way valve connected to the air supply pipeline, and a second two-position three-way valve connected to the high-pressure output pipeline. The first passage connects the first two-position three-way valve and the air spring, the second passage connects the first two-position three-way valve and the air storage tank, the third passage connects the second two-position three-way valve and the air spring, and the fourth passage connects the second two-position three-way valve and the air storage tank.

[0024] Preferably, the air intake port is provided with a first one-way valve;

[0025] The filter unit is an air filter;

[0026] The valve body module further includes an exhaust valve, and the exhaust valve is arranged in the exhaust pipeline.

[0027] Preferably, the air intake port is provided with a first one-way valve;

[0028] The filter section is a second drying section, and the valve body module further includes a third two-position three-way valve, a backflush pipeline, and a second one-way valve disposed on the backflush pipeline;

[0029] The backflush pipeline connects the upstream side of the filter section of the air supply pipeline and the downstream side of the first drying section of the high-pressure output pipeline;

[0030] The second one-way valve and the first one-way valve allow the fluid to pass in opposite directions;

[0031] The third two-position three-way valve is arranged at the intersection of the backflush pipeline and the high-pressure output pipeline, and controls the intersection to be connected with the exhaust pipeline or the high-pressure interface.

[0032] According to the second aspect of the present application, there is provided an air supply unit control method, which is used for the air supply unit described in any of the above technical solutions. Therefore, it has all the beneficial technical effects of the air supply unit, which will not be described in detail here.

[0033] Specifically, the steps include:

[0034] Replenishing air, adjusting the third two-position three-way valve to close the exhaust pipeline, connecting the intersection of the backflush pipeline and the high-pressure output pipeline to the high-pressure interface, and controlling the high-pressure output pipeline to communicate with the gas storage tank;

[0035] Back-blowing regenerates the first drying section, adjusting the third two-position three-way valve to close the high-pressure interface, connecting the intersection of the back-blowing pipeline and the high-pressure output pipeline to the exhaust pipeline, and controlling the high-pressure output pipeline to communicate with the gas storage tank;

[0036] Back-blowing regenerates the second drying section, adjusting the third two-position three-way valve to close the high-pressure interface, connecting the intersection of the back-blowing pipeline and the high-pressure output pipeline to the exhaust pipeline, and controlling the low-pressure input pipeline to communicate with the gas storage tank.

[0037] Preferably, the back-flushing regeneration step of the first drying section and the back-flushing regeneration step of the second drying section can be performed simultaneously;

[0038] Alternatively, the backflushing step of regenerating the first drying section can be performed independently;

[0039] Alternatively, the backflushing step of regenerating the second drying section can be performed independently;

[0040] The air replenishing step is performed first, and then the back-blowing regeneration step of the first drying section and / or the back-blowing regeneration step of the second drying section are performed.

[0041] Compared with the prior art, the beneficial effects of this application are:

[0042] 1. The air intake chamber accommodating the filter unit and the inner circulation chamber accommodating the first drying unit are integrated into the valve housing, avoiding the need for additional air intake and exhaust modules, which can effectively compress the volume of the air supply unit and improve the integration of the air supply unit. Compared with the existing air supply unit with independent drying tanks and air filters, the volume and overall weight of the air supply unit provided by the present application can be reduced by about 30%. At the same time, the first drying unit is integrated into the valve housing to make it closer to the heat source (i.e., electrical appliances such as motors and solenoid valves), thereby effectively improving the drying efficiency of the first drying unit.

[0043] 2. The valve housing is divided into a gas filtration area, a pressurization area and an air path control area along a first direction, and the air intake chamber and the internal circulation chamber are arranged in the gas filtration area, the pressurization part is arranged in the pressurization area, and the empty spring docking assembly is arranged in the air path control area. This not only divides the valve body module into functional areas reasonably, facilitating the docking of the valve body module with other components, but also effectively vacates the space on both sides of the valve body module perpendicular to the first direction, facilitating the suspension or lifting and placement of the valve body module, thereby improving the vibration reduction capacity of the valve body module.

[0044] 3. The air supply pipeline, exhaust pipeline, low-pressure input pipeline, high-pressure output pipeline, air intake chamber and inner circulation chamber are all integrated in the valve shell. In other words, the air supply pipeline, exhaust pipeline, low-pressure input pipeline and high-pressure output pipeline and other connecting channels are formed in the shell wall of the valve shell by an integrated casting process or a machining process. In this way, on the one hand, the number of connecting components of the air supply unit can be effectively reduced, and the manufacturing cost of the air supply unit can be reduced. In addition, the connecting channels are integrated in the valve shell, which can effectively improve the stability of the above-mentioned connecting channels, effectively reduce the probability of leakage of the connecting channels, and reduce the maintenance and repair costs of the valve body module. On the other hand, the integration of the pipeline in the valve shell can effectively shorten the total length of the connecting channel and reduce the flow resistance.

[0045] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 A perspective structural diagram of an air supply unit provided in an embodiment of the present application;

[0048] Figure 2 A schematic diagram of the exploded structure of the air supply unit provided in an embodiment of the present application;

[0049] Figure 3 This is a schematic diagram of the axonometric structure of the air supply unit provided in an embodiment of the present application;

[0050] Figure 4 Another isometric structural schematic diagram of the air supply unit provided in the embodiment of the present application;

[0051] Figure 5A schematic cross-sectional view of a valve body module provided in an embodiment of the present application;

[0052] Figure 6 A connection schematic diagram of an air supply unit provided in Embodiment 1 of the present application;

[0053] Figure 7 A connection schematic diagram of an air supply unit provided in Embodiment 2 of the present application;

[0054] Figure 8 A connection schematic diagram of an air supply unit provided in Embodiment 3 of the present application;

[0055] Fig. 9 A connection schematic diagram of an air supply unit provided in Embodiment 4 of the present application;

[0056] Fig.10 A connection schematic diagram of an air supply unit provided in Embodiment 5 of the present application.

[0057] Reference numerals:

[0058] 1-suspension part; 11-first suspension beam; 12-second suspension beam; 13-connecting ear; 2-valve body module; 20-valve housing; 201-gas filtration area; 2011-air intake chamber; 2012-internal circulation chamber; 202-pressurization area; 203-gas path control area; 21-pressurization part; 213-high pressure interface; 212-low pressure interface; 221-first switching valve; 221a-first two-position three-way valve; 222-second switching valve; 222a-second two-position three-way valve; 223-third switching valve; 224-fourth switching valve; 23-exhaust pipeline; 230-exhaust port; 231-exhaust valve; 231a-third two-position three-way valve; 24-air supply pipeline; 240 -air inlet; 241-filter part; 242-first one-way valve; 25-low-pressure input pipeline; 251-first branch; 252-second branch; 253-third branch; 254-fourth branch; 251a-first passage; 252a-second passage; 253a-third passage; 254a-fourth passage; 26-high-pressure output pipeline; 261-first drying part; 27-temperature and pressure detection part; 28-manual exhaust valve; 29-backflush pipeline; 291-second one-way valve; 3-motor; 31-soundproof cover; 4-electrical control module; 5-air spring; 51-air circuit connector; 52-air spring valve; 6-differential pressure valve; 7-gas storage tank; 71-gas tank interface.

[0059] F1-first direction; F2-second direction; F3-third direction. DETAILED DESCRIPTION

[0060] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0061] The components of the embodiments of the present application generally described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0062] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0063] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0064] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] Refer to the following Figures 1 to 10 An air supply unit and an air supply unit control method according to some embodiments of the present application are described.

[0066] See also Figures 1 to 10As shown, an embodiment of the first aspect of the present application provides an air supply unit, which includes a valve body module 2 and an electrical control module 4. The valve body module 2 includes a valve housing 20, a filter 241, a first drying part 261, an air supply pipeline 24, an exhaust pipeline 23, a low-pressure input pipeline 25, a high-pressure output pipeline 26, a pressurization part 21 and an air spring docking assembly. The valve housing 20 is divided into a gas filter area 201, a pressurization area 202 and an air circuit control area 203 in sequence along a first direction F1. The valve housing 20 is provided with an air intake port 240, an air intake chamber 2011, an exhaust port 230 and an inner circulation chamber 2012. The air intake chamber 2011 for setting the filter 241 and the inner circulation chamber 2012 for setting the first drying part 261 are both provided in the gas filter area 201. The air intake port 240 is connected to the air supply pipeline 24 via the air intake chamber 2011, and the exhaust pipeline 23 is connected to the atmosphere via the exhaust port 230. The supercharging part 21 is arranged in the supercharging area 202, the air supply line 24 and the low pressure input line 25 are respectively connected to the low pressure interface 212 of the supercharging part 21, and the exhaust line 23 and the high pressure output line 26 are respectively connected to the high pressure interface 213 of the supercharging part 21. The air spring docking assembly is arranged in the air circuit control area 203, the electrical control module 4 is arranged at one end of the valve body module 2 in the first direction F1 where the air circuit control area 203 is located, and the air supply line 24 and the exhaust line 23 are respectively connected to the air spring 5 via the air spring docking assembly. Among them, the air supply line 24, the exhaust line 23, the low pressure input line 25 and the high pressure output line 26 are all arranged in one piece in the valve housing 20.

[0067] The air supply unit provided according to the above technical features has the following beneficial effects:

[0068] 1. The air intake chamber 2011 accommodating the filter unit 241 and the inner circulation chamber 2012 accommodating the first drying unit 261 are integrated into the valve housing 20, avoiding the need for additional air intake and exhaust modules, which can effectively compress the volume of the air supply unit and improve the integration of the air supply unit. Compared with the existing air supply unit with independent drying tanks and air filters, the volume and overall weight of the air supply unit provided by the present application can be reduced by about 30%. At the same time, the first drying unit 261 is integrated into the valve housing 20 so that it is closer to the heat source (i.e., the motor 3, solenoid valve and other electrical appliances), thereby effectively improving the drying efficiency of the first drying unit 261.

[0069] 2. The valve housing 20 is divided into a gas filtering area 201, a pressurizing area 202 and an air path control area 203 along the first direction F1, and the air intake chamber 2011 and the internal circulation chamber 2012 are arranged in the gas filtering area 201, the pressurizing part 21 is arranged in the pressurizing area 202, and the empty spring docking assembly is arranged in the air path control area 203. This not only divides the valve body module 2 into reasonable functional areas, facilitating the docking of the valve body module 2 with other components, but also effectively vacates the space on both sides of the valve body module 2 perpendicular to the first direction F1, facilitating the suspension or lifting and placement of the valve body module 2, thereby improving the vibration reduction ability of the valve body module 2.

[0070] 3. The air supply pipeline 24, the exhaust pipeline 23, the low-pressure input pipeline 25 and the high-pressure output pipeline 26 are all integrally arranged in the valve housing 20. In other words, the air supply pipeline 24, the exhaust pipeline 23, the low-pressure input pipeline 25 and the high-pressure output pipeline 26 are formed in the shell wall of the valve housing 20 through an integrated casting process or a machining process. In this way, on the one hand, the number of connecting components of the air supply unit can be effectively reduced, and the manufacturing cost of the air supply unit can be reduced. In addition, the connecting channels are integrally arranged in the valve housing 20, which can effectively improve the stability of the above-mentioned connecting channels, effectively reduce the probability of leakage of the connecting channels, and reduce the maintenance and repair costs of the valve body module 2. On the other hand, the integration of the pipelines in the valve housing 20 can effectively shorten the total length of the connecting channels and reduce the flow resistance.

[0071] like Figures 1 to 5 As shown, F1 shown in the figure may be an example of the first direction F1 mentioned above. For the convenience of description, two directions perpendicular to each other on a plane perpendicular to the first direction F1 are defined as a second direction F2 and a third direction F3, respectively. F2 shown in the figure may be an example of the second direction F2 mentioned above, and F3 shown in the figure may be an example of the third direction F3 mentioned above.

[0072] Preferably, if Figures 1 to 4 As shown, the air supply unit may further include a motor 3 and a suspension part 1, and the motor 3 may be in transmission connection with the supercharging part 21 to provide power for the supercharging part 21. The suspension part 1 and the motor 3 are respectively arranged on both sides of the valve housing 20 in the second direction F2. On the one hand, the space on both sides of the valve body module 2 in the second direction F2 is effectively utilized by the suspension part 1 and the motor 3, thereby improving the space utilization rate of the air supply unit; on the other hand, the suspension part 1 realizes the suspension setting of the air supply unit, thereby further improving the vibration reduction performance of the air supply unit.

[0073] Preferably, if Figures 1 to 4As shown, the suspension part 1 may include a first suspension beam 11, a second suspension beam 12 and a connection ear 13. The second suspension beam 12 extends along the third direction F3, and the second suspension beam 12 is arranged in parallel with the top wall of the valve housing 20 to increase the contact area between the second suspension beam 12 and the valve housing 20, thereby ensuring the stability of the valve body module 2. The first suspension beam 11 is arranged at both ends of the second suspension beam 12 in the third direction F3, and the first suspension beam 11 and the second suspension beam 12 are connected via the connection ear 13 extending along the first direction F1. The first suspension beam 11 is arranged in parallel with the second suspension beam 12 to be fixed to the components docked with the air supply unit. In this way, the first suspension beam 11 and the second suspension beam 12 constitute the secondary vibration reduction of the suspension part 1, thereby effectively improving the shock absorption performance and noise reduction performance of the air supply unit.

[0074] Alternatively, if Figures 1 to 4 As shown, the second suspension beam 12 can be bolted to the top wall of the valve housing 20 via a plurality of bolts to achieve a detachable connection between the suspension portion 1 and the valve housing 20, so as to facilitate maintenance and replacement of the air supply unit.

[0075] Preferably, if Figures 1 to 4 As shown, a plurality of bolts connecting the second suspension beam 12 and the valve housing 20 may be arranged around the center of gravity of the air supply unit to improve the stability and reliability of the suspension portion 1 .

[0076] Optionally, the valve housing 20 may be made of metal material to improve the strength and thermal conductivity of the valve housing 20 .

[0077] Optionally, the electrical control module 4 may be a computer control module (Electronic Control Unit, ECU for short).

[0078] Preferably, if Figures 2 to 4 The air supply unit may further include a soundproof cover 31, which is arranged together with the side of the valve body module 2 where the motor 3 is located to form a soundproof space. The motor 3 is covered in the soundproof space. On the one hand, the space on the side of the valve body module 2 where the motor 3 is located is fully utilized. On the other hand, by setting the structure of the soundproof cover 31, the noise generated when the motor 3 is working can be effectively isolated, so that even if the air supply unit is equipped with a motor 3 with higher power, the noise standard for the use of the air supply unit can still be met.

[0079] Preferably, if Figures 2 to 4 As shown, the air spring docking assembly may further include an air circuit connector 51 for docking with the air spring 5 . The air circuit connector 51 is disposed on the side of the suspension portion 1 of the valve body module 2 to facilitate docking of the air spring 5 with the air circuit connector 51 .

[0080] Optionally, the gas circuit connector 51 may be a gas circuit quick-connect connector.

[0081] Preferably, if Figures 6 to 10 As shown, the air spring docking assembly may further include an air spring valve 52 , and the air spring 5 is connected to the valve body module 2 via the air spring valve 52 to control the flow of gas into or out of the air spring 5 to ensure the controllability of the inflation and exhaust of the air spring 5 .

[0082] Preferably, if Figures 6 to 10 As shown, there are multiple air springs 5, air spring valves 52 and air circuit connectors 51. The air spring valves 52 can be set one-to-one with the above-mentioned air circuit connectors 51, and the air springs 5 ​​can be set one-to-one with the above-mentioned air circuit connectors 51. In other words, each air spring valve 52 is corresponding to an air circuit connector 51, and each air spring 5 can be connected to an air circuit connector 51. In this way, the air supply unit can meet the simultaneous control of multiple air springs 5. In this way, the independent control of the inflation and exhaust of each air spring 5 is facilitated, thereby improving the inflation and exhaust flexibility of the air spring 5.

[0083] Preferably, if Figure 1 As shown, the above-mentioned air spring valves 52 can be arranged on the side of the above-mentioned valve body module 2 facing the electrical control module 4, so that the air spring valves 52 can be communicated and connected with the electrical control module 4.

[0084] Optionally, the above-mentioned air spring valves 52 can all be solenoid valves.

[0085] Preferably, if Figures 6 to 10 As shown, the figure shows an example in which the air supply unit supplies air to four air springs 5 ​​at the same time, but is not limited to this. The number of air springs 5 ​​can be adaptively adjusted according to the requirements of the following air suspension system. For example, the air supply unit can also supply air to 1, 2, 3, 5, 6 or more air springs 5.

[0086] Preferably, if Figures 6 to 10 As shown, the air supply unit may further include a differential pressure valve 6, which is disposed on one side of the valve housing 20 where the hanging portion 1 is disposed. Specifically, a placement hole may be disposed on the side of the valve housing 20 where the hanging portion 1 is disposed, and the differential pressure valve 6 may be disposed in the placement hole, so that part of the differential pressure valve 6 can be exposed to the outside of the valve housing 20, while another part of the differential pressure valve 6 is disposed in the valve body module 2, so as to facilitate the connection of the pipelines in the valve body module 2.

[0087] Preferably, if Figure 6 , Figure 7 , Fig. 9 , Fig.10As shown, the differential pressure valve 6 connects the high-pressure interface 213 and the low-pressure interface 212. In this way, when the air pressure at the high-pressure interface 213 exceeds the threshold value set by the differential pressure valve 6, the gas at the high-pressure interface 213 can flow to the low-pressure interface 212 through the differential pressure valve 6, so as to relieve the air pressure at the high-pressure interface 213 through the internal circulation of the boosting part 21, thereby ensuring the safety of the valve body module 2.

[0088] However, it is not limited thereto, and optionally, Figure 8 As shown, the valve body module 2 is also provided with a pressure relief pipeline, and the differential pressure valve 6 can be arranged on the pressure relief pipeline, one end of the pressure relief pipeline is connected to the high-pressure interface 213, and the other end of the pressure relief pipeline is connected to the atmosphere outside the valve shell 20. In this way, when the air pressure at the high-pressure interface 213 exceeds the threshold value set by the differential pressure valve 6, the gas in the high-pressure interface 213 can discharge excess gas through the pressure relief pipeline to ensure the safety of the valve body module 2.

[0089] In an embodiment, preferably, Figures 6 to 10 As shown, the air intake port 240 may be provided with a first one-way valve 242, so that air can only enter the air supply pipeline 24 through the air intake port 240, and the gas in the air supply pipeline 24 cannot be discharged through the air intake port 240, thereby ensuring the unidirectionality of the gas flow of the air intake port 240 and improving the service life of the filter unit 241.

[0090] Optionally, not shown in the figure, the exhaust port 230 is provided with a third one-way valve, so that air can only flow out of the exhaust pipe 23 through the exhaust port 230, and the gas outside the air supply unit cannot flow into the exhaust pipe 23 through the exhaust port 230, thereby improving the overall sealing of the air supply unit and increasing the service life of the boost part 21.

[0091] It should be noted that if Figures 6 to 10 As shown, the exhaust pipeline 23 and the high-pressure output pipeline 26 are both connected to the high-pressure interface 213. In other words, the exhaust pipeline 23 and the high-pressure output pipeline 26 are both connected to the pressure differential valve 6, that is, when one or some of the exhaust pipelines 23 and the high-pressure output pipeline 26 exceed the threshold value, the pressure differential valve 6 can be triggered to open, thereby ensuring the safety of the valve body module 2.

[0092] Preferably, if Figure 1 and Figure 5 As shown, the booster 21 may be a plunger pump, and the motor 3 may be connected to the plunger pump to provide the plunger pump with power for compressed air. It should be noted that the transmission connection structure between the plunger pump and the motor 3 is a prior art in the art and will not be described in detail here.

[0093] Preferably, if Figures 6 to 10As shown, the air supply unit may further include an air storage tank 7 connected to the valve body module 2 to enable the air supply unit to perform closed charging and discharging of the air spring 5 .

[0094] Optionally, the valve body module 2 may further include a gas tank interface 71, which may be disposed on a side of the valve body module 2 in the third direction F3 away from the air intake port 240, so that the gas tank 7 can avoid the electrical control module 4, the intake and exhaust module and the motor 3.

[0095] Preferably, if Figures 6 to 10 As shown, the valve body module 2 may further include a temperature and pressure detection unit 27 , which is disposed at the access end of the air spring 5 of the valve body module 2 to detect other pressure values ​​and temperature values ​​flowing into and out of the air spring 5 .

[0096] Optionally, the temperature and pressure detection unit 27 may also be disposed on the side of the valve body module 2 where the electrical control module 4 is located, so as to facilitate communication connection with the electrical control module 4 .

[0097] Optionally, the temperature and pressure detection unit 27 may include a temperature sensor and a pressure sensor.

[0098] Optionally, the valve body module 2 may further include a manual exhaust valve 28, which may be connected to the first branch 251 and the fourth branch 254 to achieve manual exhaust of the high-pressure output pipeline 26, that is, in the event of an electrical failure, the air supply unit can be exhausted through the manual exhaust valve high-pressure output pipeline 26, thereby ensuring the safety of disassembly of the air supply unit.

[0099] In an embodiment, Figure 6 , Figure 8 and Fig. 9 As shown, the valve body module 2 may further include a connection control component, which may include a first branch 251 and a first switching valve 221, wherein the first branch 251 connects the air spring 5 and the high-pressure output pipeline 26, so that the air spring 5 can be exhausted in sequence via the first branch 251, the high-pressure output pipeline 26 and the exhaust pipeline 23, wherein the first switching valve 221 is arranged on the first branch 251 to control the on and off of the first branch 251.

[0100] Preferably, if Figure 6 , Figure 8 and Fig. 9As shown, the connection control component can also include a second branch 252 and a second switching valve 222, and the second branch 252 connects the air spring docking assembly and the air supply pipeline 24, so that the valve body module 2 can directly supply air to the air spring 5 via the air supply pipeline 24, the low-pressure input pipeline 25 and the second branch 252 in sequence, wherein the second switching valve 222 is arranged in the second branch 252 to control the on and off of the second branch 252.

[0101] Preferably, if Figure 6 , Figure 8 and Fig. 9 As shown, the connection control assembly may further include a third branch 253 and a third switching valve 223, wherein the third branch 253 connects the second branch 252 and the air storage tank 7, wherein the third branch 253 is connected to the end of the second switching valve 222 that is away from the air spring 5. The third switching valve 223 is arranged on the third branch 253. On the one hand, by controlling the third switching valve 223, the valve body module 2 can sequentially replenish the air to the air storage tank 7 via the air replenishment pipeline 24, the low-pressure input pipeline 25 and the third branch 253; on the other hand, the second switching valve 222 and the third switching valve 223 can be controlled to realize that the valve body module 2 replenishes the air to the air spring 5 via the third branch 253 and the second branch 252 through the air storage tank 7.

[0102] Preferably, if Figure 6 , Figure 8 and Fig. 9 As shown, the connection control component may also include a fourth branch 254 and a fourth switching valve 224, wherein the fourth branch 254 connects the high-pressure output pipeline 26 and the gas storage tank 7, so that the gas storage tank 7 can exhaust to the outside via the fourth branch 254, the high-pressure output pipeline 26 and the exhaust pipeline 23, wherein the fourth switching valve 224 is arranged on the fourth branch 254 to control the opening and closing of the fourth branch 254.

[0103] However, the connection control assembly of the valve body module 2 is not limited to the examples of the first branch 251, the second branch 252, the third branch 253 and the fourth branch 254. Optionally, Figure 7 and Fig.10 As shown, the connection control component may also include a first passage 251a, a second passage 252a, a third passage 253a, a fourth passage 254a, a first two-position three-way valve 221a connected to the air supply pipeline 24, and a second two-position three-way valve 222a connected to the high-pressure output pipeline 26. The first passage 251a connects the first two-position three-way valve 221a and the air spring 5, the second passage 252a connects the first two-position three-way valve 221a and the air storage tank 7, the third passage 253a connects the second two-position three-way valve 222a and the air spring 5, and the fourth passage 254a connects the second two-position three-way valve 222a and the air storage tank 7.

[0104] Preferably, if Figures 6 to 8 As shown, the figure shows three examples of the filter part 241 of the air supply unit provided by the present application as an air filter, wherein the valve body module 2 may further include an exhaust valve 231, which is arranged in the exhaust pipeline 23 to control the opening and closing of the exhaust pipeline 23 to ensure the exhaust controllability of the air supply unit. Optionally, the exhaust valve 231 may be arranged on the side of the valve body module 2 facing the electrical control module 4, so as to facilitate the communication connection between the exhaust valve 231 and the electrical control module 4.

[0105] Based on the characteristics described above, Figure 6 and Figure 8 The structures of the first and third embodiments of the air supply unit are shown, and the working principle of the air supply unit will be described in detail below:

[0106] (a) Closed inflation (i.e., using the air tank 7 as the air source to inflate the air spring 5):

[0107] Open the first switching valve 221 and the third switching valve 223 (other valve bodies not mentioned are in the closed state), and the gas in the air tank 7 enters the low-pressure interface 212 of the boosting section 21 through the third branch 253, and after the boosting effect of the boosting section 21, it flows to the first drying section 261 of the high-pressure transmission pipeline through the high-pressure interface 213 for drying, and then flows to the air spring 5 through the first branch 251. At this time, open the air spring valve 52 corresponding to the air spring 5 that needs to be replenished, so that the air tank 7 can inflate the air spring 5.

[0108] (b) Closed exhaust (i.e., the gas discharged from the air spring 5 is discharged to the air storage tank 7):

[0109] Open the second switching valve 222 and the fourth switching valve 224, and exhaust the air spring valve 52 corresponding to the air spring 5 that needs to be exhausted (other valve bodies not mentioned are in a closed state). The gas of the air spring 5 enters the boosting section 21 through the second branch 252 via the low-pressure interface 212, and after the boosting effect of the boosting section 21, it flows to the first drying section 261 of the high-pressure transmission pipeline through the high-pressure interface 213 for drying, and then flows to the air storage tank 7 through the fourth branch 254 for storage and standby use.

[0110] (c) Open air replenishment (i.e. when the air pressure in the air storage tank 7 is insufficient):

[0111] like Figure 6 and Figure 8The dotted arrows shown open the fourth switching valve 224 and the first one-way valve 242 (other valve bodies not mentioned are in the closed state), and the external gas enters the air supply pipeline 24 through the air inlet and the air filter, and then passes through the low-pressure interface 212 of the boosting section 21. After the boosting effect of the boosting section 21, it flows to the first drying section 261 of the high-pressure transmission pipeline through the high-pressure interface 213 for drying, and then flows to the air storage tank 7 through the fourth branch 254 for storage and standby use.

[0112] (d) Regeneration of the first drying section 261:

[0113] like Figure 6 and Figure 8 The dotted arrows shown open the fourth switching valve 224 and the exhaust valve 231 (it should be noted that other valve bodies not mentioned are in a closed state), and the gas in the gas storage is blown back to the first drying section 261 through the fourth branch 254 to discharge the moisture in the drying tank out of the air supply unit through the exhaust pipe 23.

[0114] Based on the characteristics described above, Figure 7 The structure of the second embodiment of the air supply unit is shown, and the working principle of the air supply unit will be described in detail below:

[0115] (a) Idle state (i.e., the air tank 7 and the air spring 5 are neither inflated nor replenished):

[0116] The first two-position three-way valve 221a is in a state of connecting the first passage 251a and cutting off the second passage 252a, and the second two-position three-way valve 222a is in a state of connecting the third passage 253a and cutting off the fourth passage 254a (that is, both the first two-position three-way valve 221a and the second two-position three-way valve 222a are in a state of closing the air tank 7), and the air spring valve 52 is in a closed state.

[0117] (b) Closed inflation (i.e., using the air tank 7 as the air source to inflate the air spring 5):

[0118] The first two-position three-way valve 221a is switched to a state of cutting off the connection between the first passage 251a and the second passage 252a, and the second two-position three-way valve 222a remains connected to the third passage 253a and cuts off the fourth passage 254a (other valve bodies not mentioned are in a closed state). At this time, the gas in the air storage tank 7 enters the low-pressure interface 212 of the boosting section 21 through the second passage 252a, and after the boosting effect of the boosting section 21, it flows to the first drying section 261 of the high-pressure transmission pipeline through the high-pressure interface 213 for drying treatment, and then flows to the air spring 5 through the third passage 253a. At this time, the air spring valve 52 corresponding to the air spring 5 that needs to be replenished is opened to realize the inflation of the air spring 5 by the air storage tank 7.

[0119] (c) Closed exhaust (i.e., the gas discharged from the air spring 5 is discharged to the air storage tank 7):

[0120] The second two-position three-way valve 222a is switched to a state of cutting off the third passage 253a from connecting to the fourth passage 254a, the first two-position three-way valve 221a is kept connected to the first passage 251a and disconnected from the second passage 252a, and the air spring valve 52 corresponding to the air spring 5 that needs to be exhausted is exhausted (other valve bodies not mentioned are in a closed state), the gas of the air spring 5 enters the low-pressure interface 212 of the boosting section 21 through the first passage 251a, after the boosting effect of the boosting section 21, flows to the first drying section 261 of the high-pressure transmission pipeline through the high-pressure interface 213 for drying, and then flows to the air storage tank 7 through the fourth passage 254a for storage for standby use.

[0121] (d) Open air replenishment (i.e. when the air pressure in the air storage tank 7 is insufficient):

[0122] The first two-position three-way valve 221a maintains a state of connecting the first passage 251a and cutting off the second passage 252a, and the second two-position three-way valve 222a switches to a state of cutting off the third passage 253a and connecting to the fourth passage 254a, and opens the first one-way valve 242 (other valve bodies not mentioned are in a closed state), and the outside gas enters the air supply pipeline 24 through the air inlet, and then passes through the low-pressure interface 212 of the boosting part 21, and after the boosting effect of the boosting part 21, it flows to the first drying part 261 of the high-pressure transmission pipeline through the high-pressure interface 213 for drying treatment, and then flows to the air storage tank 7 through the fourth passage 254a for storage and standby use.

[0123] (e) Regeneration of the first drying section 261:

[0124] The first two-position three-way valve 221a is switched to a state of cutting off the connection between the first passage 251a and the second passage 252a, the second two-position three-way valve 222a remains connected to the third passage 253a and cuts off the fourth passage 254a, and the exhaust valve 231 is opened (it should be noted that other valve bodies not mentioned are in a closed state), and the gas in the gas storage tank 7 is backblown to the first drying section 261 through the fourth passage 254a, so that the moisture in the drying tank is discharged from the air supply unit through the exhaust pipe 23.

[0125] Preferably, if Figures 9 and 10As shown, the figure shows two examples of the filter section 241 of the air supply unit provided by the present application as the second drying section, and the valve body module 2 can also include a third two-position three-way valve 231a, a backflush pipeline 29 and a second one-way valve 291 arranged on the backflush pipeline 29. The backflush pipeline 29 connects the upstream side of the filter section 241 of the air supply pipeline 24 and the downstream side of the first drying section 261 of the high-pressure output pipeline 26. The second one-way valve 291 and the first one-way valve 242 allow the fluid to pass in opposite directions. The third two-position three-way valve 231a is arranged at the intersection of the backflush pipeline 29 and the high-pressure output pipeline 26, and controls the intersection to be connected with the exhaust pipeline 23 or the high-pressure interface 213, so that the regeneration of the first drying section 261 and the second drying section is realized through the third two-position three-way valve 231a.

[0126] Optionally, the first drying section 261 and the second drying section may both be drying tanks.

[0127] Based on the characteristics described above, Fig. 9 and Fig.10 The structures of the fourth and fifth embodiments of the air supply unit are shown, and the working principle of the air supply unit will be described in detail below:

[0128] It should be noted that the operation steps of (a) idle state, (b) closed inflation, and (c) closed exhaust in Embodiment 4 and Embodiment 5 are similar to those of Embodiment 1 to Embodiment 3 above, and will not be repeated here.

[0129] (d) Open air replenishment (i.e. when the air pressure in the air storage tank 7 is insufficient):

[0130] The third two-position three-way valve 231a is adjusted to close the exhaust pipeline 23, and the intersection of the backflush pipeline 29 and the high-pressure output pipeline 26 is connected to the high-pressure interface 213, and the high-pressure output pipeline 26 is controlled to be connected to the gas storage tank 7, that is, the fourth switching valve 224 is opened (or the second two-position three-way valve 222a is switched to the state of cutting off the fourth passage 254a from the high-pressure output pipeline 26), such as Fig. 9 As shown by the dot-dash arrows, air can flow to the air storage tank 7 along the air replenishing pipeline 24, the boosting unit 21, the third two-position three-way valve 231a, the high-pressure output pipeline 26 and the fourth branch 254 in sequence, thereby replenishing the air storage tank 7.

[0131] (e) Regeneration of the first drying section 261

[0132] The third two-position three-way valve 231a is adjusted to close the high-pressure interface 213, and the intersection of the backflush pipeline 29 and the high-pressure output pipeline 26 is connected to the exhaust pipeline 23, and the high-pressure output pipeline 26 is controlled to be connected to the gas storage tank 7, that is, the fourth switching valve 224 is opened (or the second two-position three-way valve 222a remains in the state of connecting the third passage 253a and cutting off the fourth passage 254a), such as Fig. 9 As shown by the dotted arrows, the gas in the gas storage tank 7 can be blown through the first drying section 261 along the fourth branch 254 (or the fourth passage 254a) and the high-pressure output pipeline 26 in sequence, and then discharged from the valve body module 2 via the third two-position three-way valve 231a and the exhaust pipeline 23, so as to use the gas in the gas storage tank 7 to back-blow the desiccant in the first drying section 261, so as to discharge the moisture in the drying tank through the exhaust pipeline 23 to the air supply unit.

[0133] (f) Second Drying Section Regeneration

[0134] The third two-position three-way valve 231a is adjusted to close the high-pressure interface 213, and the intersection of the backflush pipeline 29 and the high-pressure output pipeline 26 is connected to the exhaust pipeline 23, and the low-pressure input pipeline 25 is controlled to be connected to the gas storage tank 7, that is, the third switching valve 223 is opened (or the first two-position three-way valve 221a is switched to cut off the low-pressure input pipeline 25 and the third passage 253a are connected). Fig. 9 As shown by the double-dotted arrow, the gas in the gas storage tank 7 can flow through the second drying section along the third branch 253 (or the third passage 253a) and the low-pressure input pipeline 25 in sequence, and then be discharged from the valve body module 2 through the backflush pipeline 29 and the third two-position three-way valve 231a through the exhaust pipeline 23, so as to use the gas in the gas storage tank 7 to backflush the desiccant in the second drying section, so as to discharge the moisture in the drying tank through the exhaust pipeline 23 to the air supply unit.

[0135] The embodiment of the second aspect of the present application also provides an air supply unit control method, which is used for the air supply unit of any one of the above-mentioned embodiments 4 or 5, and thus has all the beneficial technical effects of the air supply unit, which will not be repeated here.

[0136] Specifically, the steps of the air supply unit control method include:

[0137] To replenish air (i.e. the above-mentioned open type replenishing air operation), adjust the third two-position three-way valve 231a to close the exhaust pipeline 23, and connect the intersection of the backflush pipeline 29 and the high-pressure output pipeline 26 to the high-pressure interface 213, and control the high-pressure output pipeline 26 to be connected to the air storage tank 7.

[0138] Back-blowing regenerates the first drying section 261 (i.e., the above-mentioned regeneration operation of the first drying section 261), adjusts the third two-position three-way valve 231a to close the high-pressure interface 213, and connects the intersection of the back-blowing pipeline 29 and the high-pressure output pipeline 26 to the exhaust pipeline 23, and controls the high-pressure output pipeline 26 to be connected to the gas storage tank 7.

[0139] Back-blowing regenerates the second drying section (i.e., the above-mentioned second drying section regeneration operation), adjusts the third two-position three-way valve 231a to close the high-pressure interface 213, and connects the intersection of the back-blowing pipeline 29 and the high-pressure output pipeline 26 to the exhaust pipeline 23, and controls the low-pressure input pipeline 25 to be connected to the gas storage tank 7.

[0140] Preferably, the above-mentioned back-flushing regenerating step of the first drying section 261 and the back-flushing regenerating step of the second drying section can be performed simultaneously, so as to improve the regeneration efficiency of both the first drying section 261 and the second drying section of the air supply unit.

[0141] Optionally, the step of back-blowing and regenerating the first drying section 261 may be performed independently, so that the air supply unit can back-blow and regenerate the first drying section 261 according to the usage of the first drying section 261 .

[0142] Optionally, the step of back-blowing and regenerating the second drying section may also be performed independently, so that the air supply unit can back-blow and regenerate the second drying section according to the usage of the second drying section.

[0143] Preferably, the air replenishing step can be performed first, and then the step of back-blowing to regenerate the first dryer section 261 and / or the step of back-blowing to regenerate the second dryer section can be performed. In other words, the air replenishing step is used to replenish excess air to the air storage tank 7 within a predetermined range, and then the excess part is used to back-blow to regenerate and dry the first dryer section 261 and / or the second dryer section. In this way, on the one hand, air replenishment is performed first, and the valve body module 2 can be preheated through the heat generated by the motor 3 and other structures during the air replenishment process, which can not only effectively improve the drying efficiency of the first dryer section 261 and the second dryer section, but also effectively improve the dryness of the gas in the air supply unit; on the other hand, the air replenishing step is arranged before the desiccant back-blowing step (i.e., the step of back-blowing to regenerate the first dryer section 261 and / or the step of back-blowing to regenerate the second dryer section), which can effectively avoid bringing external moisture into the air supply unit again after the step of back-blowing to regenerate the first dryer section 261 and / or the step of back-blowing to regenerate the second dryer section.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An air supply unit, characterized in that: It includes a valve body module and an electrical control module, wherein the valve body module includes a valve housing, a filter part, a first drying part, an air supply pipeline, an exhaust pipeline, a low-pressure input pipeline, a high-pressure output pipeline, a pressurizing part and an empty spring docking assembly; The valve housing is divided into a gas filtering area, a pressurizing area and a gas path control area in sequence along a first direction. The valve housing is provided with an air intake port, an air intake chamber, an air exhaust port and an inner circulation chamber. The air intake chamber for arranging the filter unit and the inner circulation chamber for arranging the first drying unit are both arranged in the gas filtering area. The air intake port is communicated with the air supply pipeline via the air intake chamber, and the air exhaust pipeline is communicated with the atmosphere via the air exhaust port. The supercharging unit is arranged in the supercharging area, the air supply pipeline and the low-pressure input pipeline are respectively connected to the low-pressure interface of the supercharging unit, and the exhaust pipeline and the high-pressure output pipeline are respectively connected to the high-pressure interface of the supercharging unit; The air spring docking assembly is arranged in the air circuit control area, the electrical control module is arranged at one end of the valve body module in the first direction where the air circuit control area is located, and the air supply pipeline and the exhaust pipeline are respectively docked with the air spring via the air spring docking assembly; Among them, the air supply pipeline, the exhaust pipeline, the low-pressure input pipeline, the high-pressure output pipeline, the air intake chamber and the internal circulation chamber are all integrally arranged in the valve housing.

2. The air supply unit according to claim 1, characterized in that It also includes a motor and a suspension part, wherein the motor is drivingly connected to the boosting part, and the suspension part and the motor are respectively arranged on both sides of the valve housing in a second direction, and the second direction is perpendicular to the first direction.

3. The air supply unit according to claim 2, characterized in that Also included is a differential pressure valve; The differential pressure valve connects the high pressure interface and the low pressure interface; And / or, the pressure differential valve controls the high pressure interface to communicate with the atmosphere outside the valve housing.

4. The air supply unit according to claim 1, characterized in that The air spring docking assembly includes an air spring valve, and the air spring is connected to the valve body module via the air spring valve to control the flow of gas into or out of the air spring; The number of the air springs and the number of the air spring valves are both multiple, and the air springs and the air spring valves are arranged in a one-to-one correspondence.

5. The air supply unit according to claim 1, characterized in that: The air supply unit further includes an air storage tank in communication with the valve body module; The valve body module also includes: A first branch, connecting the empty spring docking assembly and the high-pressure output pipeline, wherein the first branch is provided with a first switching valve; A second branch is connected to the air spring docking assembly and the air supply pipeline, and the second branch is provided with a second switching valve; A third branch, connecting the second branch and the gas storage tank, wherein the third branch is provided with a third switching valve; The fourth branch is connected to the high-pressure output pipeline and the gas storage tank, and the fourth branch is provided with a fourth switching valve.

6. The air supply unit according to claim 1, characterized in that The air supply unit further includes an air storage tank in communication with the valve body module; The valve body module also includes a first passage, a second passage, a third passage, a fourth passage, a first two-position three-way valve connected to the air supply pipeline, and a second two-position three-way valve connected to the high-pressure output pipeline. The first passage connects the first two-position three-way valve and the air spring, the second passage connects the first two-position three-way valve and the air storage tank, the third passage connects the second two-position three-way valve and the air spring, and the fourth passage connects the second two-position three-way valve and the air storage tank.

7. The air supply unit according to claim 5 or 6, characterized in that: The air intake port is provided with a first one-way valve; The filter unit is an air filter; The valve body module further includes an exhaust valve, and the exhaust valve is arranged in the exhaust pipeline.

8. The air supply unit according to claim 5 or 6, characterized in that: The air intake port is provided with a first one-way valve; The filter section is a second drying section, and the valve body module further includes a third two-position three-way valve, a backflush pipeline, and a second one-way valve disposed on the backflush pipeline; The backflush pipeline connects the upstream side of the filter section of the air supply pipeline and the downstream side of the first drying section of the high-pressure output pipeline; The second one-way valve and the first one-way valve allow the fluid to pass in opposite directions; The third two-position three-way valve is arranged at the intersection of the backflush pipeline and the high-pressure output pipeline, and controls the intersection to be connected with the exhaust pipeline or the high-pressure interface.

9. A method for controlling an air supply unit, characterized in that: For the air supply unit according to claim 8, the steps include: Replenishing air, adjusting the third two-position three-way valve to close the exhaust pipeline, connecting the intersection of the backflush pipeline and the high-pressure output pipeline to the high-pressure interface, and controlling the high-pressure output pipeline to communicate with the gas storage tank; Back-blowing regenerates the first drying section, adjusting the third two-position three-way valve to close the high-pressure interface, connecting the intersection of the back-blowing pipeline and the high-pressure output pipeline to the exhaust pipeline, and controlling the high-pressure output pipeline to communicate with the gas storage tank; Back-blowing regenerates the second drying section, adjusting the third two-position three-way valve to close the high-pressure interface, connecting the intersection of the back-blowing pipeline and the high-pressure output pipeline to the exhaust pipeline, and controlling the low-pressure input pipeline to communicate with the gas storage tank.

10. The air supply unit control method according to claim 9, characterized in that: The back-flushing regeneration step of the first drying section and the back-flushing regeneration step of the second drying section can both be performed simultaneously; Alternatively, the backflushing step of regenerating the first drying section can be performed independently; Alternatively, the backflushing and regenerating the second drying section step can be performed independently; The air replenishing step is performed first, and then the back-blowing regeneration step of the first drying section and / or the back-blowing regeneration step of the second drying section are performed.

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