Closed gas supply unit and vehicle

Abstract

The invention provides a closed type air supply unit and a vehicle, and relates to the technical field of vehicle air suspension systems, the closed type air supply unit is connected with an air spring and an air storage cylinder through an air path, the closed type air supply unit comprises a motor, a drying tank, a valve block, a supercharging device and an integrated controller, one side of the integrated controller is fixedly connected with the valve block, and the valve block is provided with a plurality of parts; the valve blocks are arranged in the middle of the motor and clamp the motor, the valve blocks are communicated through gas paths, a through hole is formed in the motor, the supercharging device is arranged in the valve blocks, the drying tank is fixedly connected with the valve blocks, and the valve blocks, the drying tank and the motor form a circulating gas path. The heating area and the valve control area are arranged separately, the motor is cooled through the motor intervening gas circuit circulation, the integrated controller is protected through the mounting base and the fixed base, collision of gravel and the like can be effectively prevented, and the structural layout is more reasonable.

Description

Technical Field

[0001] The present invention relates to the technical field of air suspension systems for vehicles, and in particular to a closed air supply unit and a vehicle. Background Art

[0002] The air suspension system of motor vehicles requires an air supply unit to supply and deflate the air springs. The existing air supply unit has some shortcomings that cannot be ignored:

[0003] Most existing air suspension air supply units use an independent air pump assembly and are equipped with separate control valves, which takes up a large space, increases the number of parts in the entire air supply unit, and complicates the structure of the air pump assembly itself, increasing the difficulty and cost of system assembly.

[0004] A large amount of heat is generated during the operation of the boost device. The existing air supply unit arranges the boost device and the electromagnetic device adjacent to each other. The heat generated by the boost device will affect the operating stability of the solenoid valve, and at the same time affect the sealing performance of the solenoid valve control area, affect the stability of the equipment, reduce the sensitivity of the suspension system, and bring a bad driving experience to the passengers.

[0005] The existing air suspension air supply unit requires the air pump assembly and each control valve to be connected with pipes, which not only increases the length and complexity of the pipeline, but may also make the pipeline layout difficult. During the operation of the equipment, the motor needs to run continuously for charging and deflating, and the motor continuously generates heat, which affects the stability of the equipment.

[0006] In the existing technology, the air pump supplies and stores air to the air cylinder. When the air suspension actuator needs gas, the air cylinder supplies gas, so the air cylinder needs to always maintain high-pressure gas. When the actuator discharges gas, the gas will be directly discharged into the atmosphere. The whole process greatly increases the energy consumption of the vehicle.

[0007] Therefore, it is urgent to develop a closed air supply unit to solve the above problems. Summary of the Invention

[0008] The present invention relates to a closed air supply unit and a vehicle. By providing a plurality of valve blocks and placing a motor between the valve blocks, the valve blocks are arranged in partitions, so that the layout of the valve blocks and the air circuit is more reasonable and the integration is higher. By designing the gas as an internal circulation mode, the gas utilization rate is improved, the energy consumption is reduced, and the above-mentioned technical problems are effectively solved.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: a closed air supply unit and a vehicle, wherein the air supply unit assembly is respectively connected to the air spring and the air cylinder air circuit, and the closed air supply unit assembly includes: a motor, a drying tank, a valve block, a boosting device and an integrated controller, a valve block is fixedly connected to one side of the integrated controller, the valve block has multiple parts, the valve block is arranged to clamp the motor, the valve blocks are connected through an air circuit, the boosting device is arranged inside the valve block, the drying tank is fixedly connected to the valve block, and the valve block, drying tank and motor form a circulating air circuit.

[0010] Preferably, the valve block has two parts, namely valve block one and valve block two. The valve block one and valve block two are arranged opposite to the motor. A booster device is provided on the upper part of the valve block one, and an air inlet connection port and an air outlet connection port are provided on the outer side of the valve block one. The valve block one, valve block two, drying tank and motor form an air circuit loop. The valve block two is provided with an air spring connection port and an air cylinder connection port, and the air spring connection ports are arranged in a straight line.

[0011] Preferably, the motor is fixedly connected between valve block 1 and valve block 2, the motor is connected to valve block 1 and valve block 2 via air circuits, and a through hole is provided inside the motor.

[0012] Preferably, the boosting device is a double-piston boosting device, and the double-piston boosting devices are arranged opposite to each other. The boosting device includes an exhaust check valve, a cylinder liner, an intake check valve, a connecting rod mechanism and a cam mechanism. The drive shaft is movably hinged to the cam mechanism, and the cam mechanism is articulated to the connecting rod mechanism. The top of the connecting rod mechanism is movably connected to the intake check valve, the cylinder liner is fixedly installed in the valve block 1, the connecting rod mechanism moves back and forth in the cylinder liner, and the valve block 1 is provided with an exhaust check valve.

[0013] Preferably, a filter screen, a second one-way valve, a safety valve and an exhaust valve are provided in the valve block 1, and a first one-way valve and a throttle valve are provided in the valve block 2.

[0014] Preferably, the integrated controller includes: a drive connection port, an air spring reversing valve, an air spring control valve, an air pressure and temperature sensor, an exhaust valve and a safety valve. The air spring reversing valves are respectively a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve. The first reversing valve is arranged in the air circuit between the first one-way valve and the air spring control valve, the second reversing valve is arranged in the air circuit between the air cylinder and the first one-way valve, the third reversing valve is arranged in the air circuit between the motor and the air spring control valve, the fourth ventilation valve is arranged in the air circuit between the motor and the air cylinder, and the exhaust valve is arranged in the air circuit between the booster and the drying tank. The air spring control valves are connected side by side, an air pressure and temperature sensor is provided on one side of the air spring control valve, the tail end of the air spring control valve is connected to the air spring air circuit, the safety valve and the exhaust valve are arranged in valve block one, and the air spring reversing valve, air spring control valve and air pressure and temperature sensor are arranged in valve block two.

[0015] Preferably, the air inlet interface is connected to the air circuit of the filter, the filter is connected to the air circuit of the second reversing valve, the second reversing valve is connected to the air circuit of the boosting device, both ends of the boosting device are connected to safety valves through the air circuit, the motor is movably hinged to the boosting device, the motor is connected to the air circuit of the boosting device, the boosting device is connected to the air circuit of the drying tank, and both ends of the air circuit of the first one-way valve are connected to throttle valves.

[0016] Preferably, the drive connection port is provided on one side of the integrated controller, and the integrated controller is electrically connected to the vehicle system of the motor vehicle via the drive connection port.

[0017] Preferably, the drying tank adopts a single-cylinder drying tank structure, the drying tank is filled with active molecular sieve, and the gas in the closed air supply unit is back-flushed to the drying tank through a throttle valve to achieve dehumidification of the drying tank and repeated use.

[0018] The present invention provides a vehicle using the closed air supply unit assembly.

[0019] Beneficial effects

[0020] The present invention provides a closed air supply unit and a vehicle, which have the following advantages compared with the existing technology:

[0021] The present invention adopts a dual-piston or multi-piston arrangement. Taking a dual-piston pump as an example, the dual pistons are horizontally opposed and arranged in parallel, which can effectively reduce vibration during movement.

[0022] The present invention arranges the motor in the center, and the boost device and the solenoid valve control area are respectively located on both sides of the motor, so as to realize the separate arrangement of the heating area and the valve control area, reduce the influence of the heat generated by the boost device on the machine seals in the valve control area, and install the integrated controller on one side of the motor. After the equipment is installed, the integrated controller is protected by the mounting seat and the fixed base, which can effectively prevent collisions with sand and stones, and the structural layout is more reasonable.

[0023] The valve blocks of the present invention are connected by pipelines, and the motor is provided with a through hole, so that the valve block, the drying tank and the motor form a circulating gas circuit. When the gas passes through the motor, the motor is backblown to dissipate heat, thereby reducing the temperature of the motor itself. The motor can be maintained in a constant temperature range, which can better improve the motor performance and the overall gas supply efficiency.

[0024] The present invention arranges the empty spring connection ports in a straight line on the same valve block, thereby achieving a straight line arrangement of pipelines with the same function, which is more conducive to the direction arrangement of the pipelines and more reasonable in the pipeline layout.

[0025] When the actuator needs gas, the gas source of the air cylinder enters the air supply unit assembly through a special valve system arrangement and is filled into the air spring of the actuator through an air pump. The gas with the original pressure of the air cylinder is equivalent to a certain basic pressure, and the use pressure can be reached without secondary pressurization. When the actuator needs to be exhausted, the exhausted gas is controlled by the special valve system of the air supply unit and then returned to the air cylinder, so that the gas is always in circulation within the system, effectively reducing the energy loss during the vehicle suspension adjustment process.

[0026] The patented product of this invention is highly integrated, making the overall structure completely different from the previous traditional multiple assembly method. The overall form is more compact, and a single-cylinder drying tank structure is adopted, which has a higher overall volume utilization rate, high component integration, and a small overall volume, effectively reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention 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, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0028] Figure 1 This is a schematic structural diagram of one side of the present invention;

[0029] Figure 2 This is a structural schematic diagram of the other side of the present invention;

[0030] Figure 3 It is a rear view of the present invention;

[0031] Figure 4 This is a schematic diagram of the motor structure of the present invention;

[0032] Figure 5 This is a plan view of the booster device of the present invention;

[0033] Figure 6 This is a top view of the integrated controller of the present invention;

[0034] Figure 7 This is a structural diagram of the integrated controller and valve block of the present invention in an installed state;

[0035] Figure 8 This is a schematic diagram of the present invention in use;

[0036] Figure 9 This is a schematic diagram of the gas circuit operation principle of the present invention;

[0037] In the picture:

[0038] 1. Motor, 101. Drive shaft, 102. Through hole, 103. Power socket,

[0039] 2. Integrated controller, 201, drive connection port,

[0040] 202, air spring reversing valve, 2021, first reversing valve, 2022, second reversing valve, 2023, third reversing valve, 2024, fourth reversing valve,

[0041] 203, air spring control valve, 2031, second air spring control valve, 2032, second air spring control valve, 2033, second air spring control valve, 2034, second air spring control valve,

[0042] 204, air pressure and temperature sensor, 205, exhaust valve, 206, safety valve,

[0043] 3. Valve block,

[0044] 301, valve block 1, 3011, air inlet connection, 3012, air outlet connection, 3013, filter, 3014, second one-way valve, 3015, power connection,

[0045] 302, valve block 2, 3021, air spring connection port, 3022, air reservoir connection port, 3023, first one-way valve, 3024, throttle valve,

[0046] 4. Supercharging device, 401. Exhaust check valve, 402. Cylinder liner, 403. Intake check valve, 404. Connecting rod mechanism, 405. Cam mechanism,

[0047] 5. Drying tank, 6. Air spring, 7. Air reservoir, 8. Mounting seat, 9. Fixed base. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in conjunction with the embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and drawings, but the scope of protection is not limited thereto.

[0049] See also Figures 1-9 , the present invention provides a technical solution:

[0050] A closed air supply unit, the air supply unit assembly is respectively connected to the air circuits of the air spring 6 and the air reservoir 7, and the closed air supply unit includes: a motor 1, a drying tank 5, a valve block 3, a boosting device 4 and an integrated controller 2, one side of the integrated controller 2 is fixedly connected to the valve block 3, the boosting device 4 is arranged inside the valve block 3, and the drying tank 5 is fixedly connected to the valve block 3.

[0051] The valve block 3 can have multiple parts, and the valve blocks 3 of the multiple parts are connected by pipelines. The valve blocks 3 of two parts clamp and fix the motor 1. The drying tank 5 can be installed on any part of the valve block 3. The valve block 3, the motor 1 and the drying tank 5 can form a circulating air path. By setting up multiple valve blocks 3, the closed air supply unit can be divided into functional areas or usage status areas.

[0052] In some embodiments, when the valve block 3 is divided into two parts, they are valve block 1 301 and valve block 2 302 respectively. A boosting device 4 is provided on the upper part of the valve block 1 301, and a power supply connection 3015 is provided on the lower part of the valve block 1 301. An air inlet connection port 3011 and an air outlet connection port 3012 are provided on the outer side of the valve block 1 301. The valve block 1 301 and the valve block 2 302 are arranged opposite to the motor 1. The valve block 1 301 and the valve block 2 302 are connected in the air circuit. The valve block 1 301, the valve block 2 302, the drying tank 5 and the motor 1 form an air circuit loop. The valve block 2 302 is provided with an empty spring connection port 3021, and the empty spring connection port 3021 is arranged in a straight line. The air supply unit valve block 1 301 is a heating area, and the valve block 2 302 is a valve control area, so as to reduce the impact of the heating area where the boosting device 4 is located on the solenoid valve and the seal.

[0053] In some embodiments, the drive connection port 201 is disposed on one side of the valve block 2 302 .

[0054] In some embodiments, a through hole 102 is provided within the motor 1. The motor 1 is fixedly connected between the valve block 1 301 and the valve block 2 302. The motor 1 is connected to the valve block 1 301 and the valve block 2 302 through a gas path. The motor 1 is provided with a drive shaft 101. A power socket 103 is provided on one side of the drive shaft 101. The power socket 103 is electrically connected to the power supply 3015 below the valve block 1 301. The motor 1 is electrically controlled by the integrated controller 2. A through hole 102 is provided on one side of the drive shaft 101. The gas in the closed gas supply unit passes through the booster device 4 through a pipeline into the valve block 2 302, and then enters the motor 1 through the valve block 2 302. It then returns to the valve block 1 301 through the through hole 102 on the motor 1. The circulation of the gas can effectively reduce the heat of the motor 1, maintaining the motor 1 within a constant temperature range, and can better improve the performance of the motor 1 and the overall gas supply efficiency.

[0055] In some embodiments, the motor 1 is fixedly connected between the valve block 1 301 and the valve block 2 302 . The valve block 1 301 and the valve block 2 302 are connected through another air path, and the valve block 1 301 and the valve block 2 302 form a loop.

[0056] In some embodiments, the boosting device 4 is a dual-piston boosting device 4, and the dual-piston boosting devices 4 are arranged opposite to each other. The boosting device 4 includes an exhaust check valve 401, a cylinder sleeve 402, an intake check valve 403, a connecting rod mechanism 404 and a cam mechanism 405. The drive shaft 101 is movably hinged to the cam mechanism 405, and the cam mechanism 405 is articulated to the connecting rod mechanism 404. The top of the connecting rod mechanism 404 is movably connected with the intake check valve 403. The cylinder sleeve 402 is fixedly installed in the valve block 301, and the connecting rod mechanism 404 moves back and forth in the cylinder sleeve 402. The valve block 301 is provided with an exhaust check valve 401.

[0057] In some embodiments, valve block 1 301 is equipped with a filter 3013, a second one-way valve 3014, a safety valve 206, and an exhaust valve 205. Safety valve 206 prevents accidents such as explosion or seal failure caused by high pressure within the closed air supply unit. When the air pressure within the closed air supply unit exceeds a predetermined range, safety valve 206 opens. When the air pressure reaches the predetermined range, safety valve 206 closes, sealing the air system. Valve block 2 302 is equipped with a first one-way valve 3023 and a throttle valve 3024. Safety valve 206 and throttle valve 3024 adjust the gas flow rate by changing the flow cross-sectional area, thereby controlling the movement speed of air spring 6 and the response speed of the vehicle chassis.

[0058] The integrated controller 2 includes: a drive connection port 201, an air spring reversing valve 202, an air spring control valve 203, an air pressure and temperature sensor 204, an exhaust valve 205 and a safety valve 206. The air spring reversing valve 202 is respectively a first reversing valve 2021, a second reversing valve 2022, a third reversing valve 2023 and a fourth reversing valve 2024. The first reversing valve 2021 is arranged in the air path between the first one-way valve 3023 and the air spring control valve 203, the second reversing valve 2022 is arranged in the air path between the air cylinder 7 and the first one-way valve 3023, the third reversing valve 2023 is arranged in the air path between the motor 1 and the air spring control valve 203, and the fourth ventilation valve is arranged in the air path between the motor 1 and the air cylinder 7.

[0059] The exhaust valve 205 is arranged in the air path between the supercharging device 4 and the drying tank 5, the air spring control valve 203 is connected side by side, an air pressure and temperature sensor 204 is provided on one side of the air spring control valve 203, the tail end of the air spring control valve 203 is connected to the air path of the air spring 6, the safety valve 206 and the exhaust valve 205 are arranged in the valve block 1 301, the air spring reversing valve 202, the air spring control valve 203 and the air pressure and temperature sensor 204 are arranged in the valve block 2 302, the air pressure and temperature sensor 204 can monitor the system air pressure and temperature changes, an air spring connection port 3021 is provided on the outside of the valve block 2 302 and the air spring connection port 3021 is arranged in a straight line, which is more conducive to the direction of the pipeline layout.

[0060] In some embodiments, the air inlet interface inhales air and enters the boosting device 4 after passing through the filter 3013 and the second reversing valve 2022. The two ends of the boosting device 4 are connected to the safety valve 206 through the air circuit. The gas enters the valve block 2 302 through the pipeline between the valve block 1 301 and the valve block 2 302. The motor 1 and the boosting device 4 are movably hinged, the motor 1 and the boosting device 4 are connected in air circuit, the boosting device 4 is connected in air circuit to the drying tank 5, the two ends of the first one-way valve 3023 are connected in air circuit with the throttle valve 3024, and the air outlet interface is connected in air circuit to the exhaust valve 205 to exhaust the device.

[0061] In some embodiments, the drive connection port 201 is provided on one side of the integrated controller 2 , and the drive connection port 201 of the integrated controller 2 is electrically connected to the vehicle system of the motor vehicle through a connector.

[0062] In some embodiments, when the valve block 3 is divided into three parts, the valve blocks 3 are valve block three, valve block four and valve block five respectively. A boosting device 4 is provided in valve block three, a drying tank 5 is provided above valve block four, valve block five is provided with a linearly arranged empty spring connection port 3021, valve block five is provided with a drive connection port 201, valve block three and valve block five clamp and fix the motor 1, valve block four is provided on one side of valve block three, and the valve blocks three, four and five are connected through pipelines.

[0063] In some embodiments, the drying tank 5 adopts a single-cylinder drying tank 5 structure, and the drying tank 5 is filled with active desiccant. The gas in the closed air supply unit is back-flushed to the drying tank 5 through the throttle valve 3024 to achieve repeated use after dehumidification of the drying tank 5. After the single-cylinder drying tank 5 is integrated, the overall volume utilization rate is higher.

[0064] In some embodiments, the connection parts between each gas path and the device in the present invention are sealed with a sealing rubber ring or a sealing gasket to ensure the air tightness of the entire gas path of the closed gas supply unit.

[0065] In some embodiments, the valve block 2 302 can be made of a lighter material as needed, including but not limited to aluminum alloy, plastic, etc.

[0066] In some embodiments, a vehicle is provided that uses the closed air supply unit assembly of the present invention.

[0067] In some embodiments, mounting holes are provided on both sides of valve block 1 301 and valve block 2 302 in the closed air supply unit, which are fixed to the valve block 3 using a mounting seat 8, and the mounting seat 8 is bolted to the fixed base 9. The closed air supply unit is installed inverted, and the integrated controller 2 is installed on one side of the mounting seat 8, forming protection for the integrated controller 2, which can effectively prevent collisions with sand and stones.

[0068] In some embodiments, the valve block 3, integrated controller 2, motor 1, and drying tank 5 in the present invention form a unified sealed air supply unit. One end of the closed air supply unit is connected to the air spring 6 part of the air suspension actuator through the air spring connection port 3021, and the other end is connected to the energy storage device air cylinder 7 through the air cylinder connection port 3022. The air cylinder 7 does not require a very high air pressure. When the actuator needs gas, the air source of the air cylinder 7 enters the air supply unit assembly and is filled into the actuator air spring 6 through the booster device 4. The gas of the original pressure of the air cylinder 7 has a certain basic pressure and can reach the use pressure without secondary boosting. When the actuator needs to be exhausted, the exhausted gas is controlled by the solenoid valve of the closed air supply unit and then returns to the air cylinder 7, so that the gas is always circulating inside the system, effectively reducing the energy consumption during the vehicle air suspension control process.

[0069] Example 1

[0070] The air supply unit of the present invention controls the vehicle chassis lifting function, the integrated controller 2 controls the operation of the motor 1, and opens the first reversing valve 2021, the fourth reversing valve 2024, the first air spring control valve 2031, the fourth air spring control valve 2034 (or the second air spring control valve 2032, the third air spring control valve 2033), the gas enters the motor 1 from the air reservoir 7, and enters the booster device 4 of the valve block 301 through the motor 1. The gas is pressurized by the booster device 4, and the pressurized gas passes through the drying tank 5 and the first The one-way valve 3023, the first reversing valve 2021, the gas passes through the first air spring control valve 2031, the fourth air spring control valve 2034 (or the second air spring control valve 2032, the third air spring control valve 2033), and finally enters the first air spring and the fourth air spring (or the second air spring and the third air spring) to realize the function of increasing the height of the vehicle. The air pressure and temperature can be monitored synchronously in the above process, and the temperature and pressure in the closed air supply unit are monitored by the integrated controller 2. The gas passes through the motor 1 to dissipate heat to the motor 1.

[0071] Example 2

[0072] The air supply unit of the present invention controls the lifting function of the vehicle chassis, and the integrated controller 2 controls the operation of the motor 1 and opens the second reversing valve 2022, the third reversing valve 2023, the first air spring control valve 2031, and the fourth air spring control valve 2034 (or the second air spring control valve 2032, the third air spring control valve 2033). The gas flows from the first air spring and the fourth air spring (or the second air spring and the third air spring) through the first air spring control valve 2031, the fourth air spring control valve 2034 (or the second air spring control valve 2032, the third air spring control valve 2033). Three-way spring control valve 2033), the gas enters the motor 1 through the third reversing valve 2023, and is pressurized by the boosting device 4 of the valve block 1 301. The pressurized gas passes through the drying tank 5, the first one-way valve 3023 and the second reversing valve 2022, and finally enters the air storage cylinder 7, realizing the vehicle height lowering function. The air pressure and temperature can be monitored synchronously during the above process, and the temperature and pressure in the closed air supply unit are monitored by the integrated controller 2. The gas passes through the motor 1 to dissipate heat to the motor 1.

[0073] Example 3

[0074] The air supply unit of the present invention controls the vehicle air cylinder 7 to store air. When the integrated controller 2 detects that the air pressure in the air cylinder 7 is insufficient, the motor 1 is started to replenish the air in the air cylinder 7. The motor 1 of the closed air supply unit works and opens the second reversing valve 2022. The air enters the closed air supply unit from the air inlet connection port 3011 through the filter 3013 and the second one-way valve 3014. The purified air enters the boosting device 4 inside the valve block 1 301. The high-pressure gas after boosting passes through the drying tank 5, the first one-way valve 3023, and the second reversing valve 2022 in sequence and enters the air cylinder 7, completing the inflation of the air cylinder 7.

[0075] Example 4

[0076] The closed air supply unit of the present invention controls the gas drying tank 5 to filter out water vapor to achieve regeneration of the gas drying tank 5. The interior of the drying tank 5 contains a molecular sieve that can absorb moisture and be reused. When the system detects that the moisture content of the drying tank 5 is too high, it will backflush the moisture away through compressed air. The closed air supply unit opens the second reversing valve 2022 and the exhaust valve 205. High-pressure air flows from the air reservoir 7 through the second reversing valve 2022, the throttle valve 3024, the drying tank 5 and the exhaust valve 205, and is discharged into the atmosphere through the air outlet connection port 3012, while taking away the moisture inside the drying tank 5.

[0077] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the present invention, which should be regarded as belonging to the scope of patent protection determined by the submitted claims of the present invention.

Claims

1. A closed air supply unit, comprising: A motor, a drying tank, a valve block, a boosting device, and an integrated controller, characterized in that: a valve block is fixedly connected to one side of the integrated controller, the valve block has multiple parts, the valve block is arranged to clamp the motor, the valve blocks are connected by an air path, the boosting device is arranged inside the valve block, the drying tank is fixedly connected to the valve block, and the valve block, drying tank, and motor form a circulating air path.

2. A closed air supply unit according to claim 1, characterized in that: The valve block has two parts, namely valve block one and valve block two. The valve block one and valve block two are arranged opposite to the motor. A booster device is provided on the upper part of the valve block one. An air inlet connection port and an air outlet connection port are provided on the outer side of the valve block one. The valve block one, valve block two, drying tank and motor form an air circuit loop. The valve block two is provided with an air spring connection port and an air storage cylinder connection port, and the air spring connection ports are arranged in a straight line.

3. A closed air supply unit according to claim 2, characterized in that: The motor is fixedly connected between the valve block 1 and the valve block 2, the motor is connected to the valve block 1 and the valve block 2 through air paths, and a through hole is provided inside the motor.

4. A closed air supply unit according to claim 3, characterized in that: The boosting device is a double-piston boosting device, and the double-piston boosting devices are arranged opposite to each other. The boosting device includes an exhaust check valve, a cylinder sleeve, an intake check valve, a connecting rod mechanism and a cam mechanism. The drive shaft is movably hinged to the cam mechanism, and the cam mechanism is articulated to the connecting rod mechanism. The top of the connecting rod mechanism is movably connected to the intake check valve. The cylinder sleeve is fixedly installed in the valve block 1, and the connecting rod mechanism moves back and forth in the cylinder sleeve. The valve block 1 is provided with an exhaust check valve.

5. The closed air supply unit according to claim 2, characterized in that: The valve block 1 is provided with a filter screen, a second one-way valve, a safety valve and an exhaust valve, and the valve block 2 is provided with a first one-way valve and a throttle valve.

6. The closed air supply unit according to claim 5, characterized in that: The integrated controller includes: a drive connection port, an air spring reversing valve, an air spring control valve, an air pressure and temperature sensor, an exhaust valve and a safety valve. The air spring reversing valves are respectively a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve. The first reversing valve is arranged in the air circuit between the first one-way valve and the air spring control valve, the second reversing valve is arranged in the air circuit between the air cylinder and the first one-way valve, the third reversing valve is arranged in the air circuit between the motor and the air spring control valve, the fourth ventilation valve is arranged in the air circuit between the motor and the air cylinder, and the exhaust valve is arranged in the air circuit between the booster and the drying tank. The air spring control valves are connected side by side, an air pressure and temperature sensor is provided on one side of the air spring control valve, the tail end of the air spring control valve is connected to the air spring air circuit, the safety valve and the exhaust valve are arranged in valve block one, and the air spring reversing valve, air spring control valve and air pressure and temperature sensor are arranged in valve block two.

7. The closed air supply unit according to claim 6, characterized in that: The air inlet interface is connected to the filter air circuit, the filter is connected to the second reversing valve air circuit, the second reversing valve is connected to the boosting device air circuit, both ends of the boosting device are connected to safety valves through the air circuit, the boosting device is connected to the drying tank air circuit, and both ends of the first one-way valve are connected to throttle valves.

8. The closed air supply unit according to claim 2, characterized in that: The drive connection port is provided on one side of the integrated controller, and the integrated controller is electrically connected to the vehicle system of the motor vehicle via the drive connection port.

9. The closed air supply unit according to claim 5, characterized in that: The drying tank adopts a single-cylinder drying tank structure, and the drying tank is filled with active desiccant. The gas in the closed air supply unit is back-blown to the drying tank through a throttle valve to achieve repeated use after dehumidification.

10. A vehicle, characterized in that: Use the closed air supply unit assembly as claimed in any one of claims 1 to 9.

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