Compressed air supply system of electric commercial vehicle

Abstract

The utility model relates to a compressed air supply system of an electric commercial vehicle, which belongs to the technical field of vehicles and comprises an air filtering part, an air compressing part, a compressed air processing part, a micro-control module and a power supply module for supplying power to the whole system. The air filtering part, the air compressing part and the compressed air processing part are all connected to the micro-control module; according to the utility model, key modules such as air filtration, compression, processing, micro-control and power supply are highly integrated, so that the number of system components is remarkably reduced, the coordination among the components is optimized, and the length of a pipeline is shortened, thereby greatly improving the overall operation efficiency and reliability of the system. Due to the design, the system is more compact, the occupied space is smaller, and meanwhile the complexity and the maintenance cost of the system are reduced; meanwhile, the air filtering part and the compressed air processing part can be easily disassembled and replaced through the connection mode of the sliding grooves and the sliding rails, and the maintenance difficulty and cost are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and in particular relates to a compressed air supply system for an electric commercial vehicle. Background Art

[0002] Pneumatic brake systems are widely used in commercial vehicle chassis due to their unique advantages, including high braking efficiency, excellent stability, easy operation, and short pedal travel. This system uses an engine-driven air compressor to convert compressed air pressure into mechanical thrust in the brake mechanism, generating braking force. However, with the continuous advancement of commercial vehicle technology and the increasing trend towards electrification and intelligent vehicles, traditional pneumatic brake systems are facing increasing challenges.

[0003] In existing pneumatic brake systems, the compressed air supply and air handling systems are typically located separately. This layout results in a large number of system components, poor coordination between them, and increased maintenance complexity while also occupying a significant amount of space. Furthermore, the long pipelines compromise the overall efficiency and reliability of the system. Utility Model Content

[0004] The purpose of the present invention is to provide a compressed air supply system for an electric commercial vehicle to solve the problems existing in the prior art.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A compressed air supply system for an electric commercial vehicle includes an air filter unit, an air compressor unit, a compressed air processing unit, a micro-control module, and a power module for supplying power to the entire system; the air filter unit, the air compressor unit, and the compressed air processing unit are all connected to the micro-control module;

[0007] The micro-control module is installed above the air compression unit. Two parallel slide grooves are provided at the bottom of the air compression unit. The top of the compressed air processing unit and the top of the air filter unit are both provided with slide rails matching the slide grooves. The compressed air processing unit and the air filter unit are both detachably connected to the air compression unit; the low-pressure ventilation pipe at the air outlet of the air filter unit is connected to the air inlet of the air compression unit, the air outlet of the air compression unit is connected to the air inlet of the compressed air processing unit through the high-pressure ventilation pipe, and the air outlet of the compressed air processing unit is connected to the air-consuming components of the electric commercial vehicle.

[0008] Further improvements of the present technical solution include: the air filtration unit includes a filter housing, a porous cover plate, an air filter element and a gas pressure sensor; the filter housing is a cylindrical structure; the porous cover plate is installed at one end of the filter housing; a sealing plate is provided at the end of the filter housing away from the porous cover plate; a connecting hole is provided on the sealing plate; the air inlet end of the low-pressure ventilation pipe is connected to the connecting hole; the air filter element is provided at the connecting hole; the gas pressure sensor is installed in the low-pressure ventilation pipe, and the gas pressure sensor is connected to the input end of the micro-control module.

[0009] A further improvement of the present technical solution is that the air compression unit includes a compression shell and an air compressor arranged in the compression shell, the air inlet of the air compressor is connected to the air outlet end of the low-pressure ventilation pipe, and the air outlet of the air compressor is connected to the air inlet end of the high-pressure ventilation pipe.

[0010] A further improvement of the technical solution is that the compressed air processing unit includes a processing shell, one end of the processing shell is provided with a gland threadedly connected to the processing shell, the end of the processing shell away from the gland is provided with an air outlet plate, the air outlet plate is sealed and connected to the processing shell, a first accommodating chamber and a second accommodating chamber are provided in the processing shell, a truncated cone-shaped air permeable net is provided between the first accommodating chamber and the second accommodating chamber, a flexible air permeable storage box is provided in the first accommodating chamber, a desiccant is stored in the storage box, a compression spring is provided between the storage box and the gland, and the storage box can wrap the air permeable net under the pressure of the gland and the compression spring; a spiral condensation channel is provided on the inner wall of the processing shell, An electric heating wire is provided in the condensation channel; a slide rail connected to the slide groove is provided on the top side wall of the processing shell, and a drain port is provided on the processing shell on the opposite side of the slide rail. The drain port is located at the lowest position of the condensation channel, and the drain port is connected to the first accommodating chamber. A heating ceramic is provided between the drain port and the first accommodating chamber, and a regeneration drain solenoid valve is provided in the drain port away from the first accommodating chamber. The regeneration drain solenoid valve is connected to the output end of the micro-control module, and the heating ceramic is connected to the electric heating wire; a plurality of air outlets are provided in the second accommodating chamber, and an air outlet solenoid valve is installed in each air outlet, and the air outlet is connected to the corresponding gas-applying components of the electric commercial vehicle.

[0011] Further improvements to the present technical solution include: the micro-control module includes a junction box and a main control chip U1, a motor control circuit, a solenoid valve control circuit and a heating control circuit arranged in the junction box; the main control chip U1 is controlled and connected to the air compressor through the motor control circuit, the regeneration water discharge solenoid valve and the air outlet solenoid valve are both controlled and connected to the main control chip U1 through the solenoid valve control circuit, and the heating ceramic is controlled and connected to the main control chip U1 through the heating control circuit.

[0012] A further improvement of this technical solution is that the main control chip U1 adopts a single-chip microcomputer of model STM32F103C8T6.

[0013] Further improvements of the present technical solution include that the motor control circuit includes an electromagnetic relay K1 and a diode D4, the input end of the electromagnetic relay K1 is connected to the first pin of the main control chip U1, the power end of the electromagnetic relay K1 is connected to the external 24V DC power, the ground end of the electromagnetic relay K1 is connected to the positive pole of the diode D4, the negative pole of the diode D4 is grounded, the first end of the main contact of the electromagnetic relay K1 is connected to the external three-phase power supply, and the first end of the main contact of the electromagnetic relay K1 is connected to the air compressor.

[0014] A further improvement of the technical solution is that the solenoid valve control circuit includes a plurality of solenoid valve control sub-circuits, and the solenoid valve control sub-circuits include a first resistor, a second resistor, a field effect transistor and a first diode;

[0015] The first end of the first resistor is connected to the output pin of the main control chip U1, the second end of the first resistor is connected to the first end of the second resistor and the gate of the field effect tube, the second end of the second resistor is grounded, the source of the field effect tube is grounded, the drain of the field effect tube is connected to the first end of the solenoid valve and the positive pole of the first diode, and the second end of the solenoid valve and the negative pole of the first diode are both connected to the external 24V DC power.

[0016] A further improvement of the present technical solution is that the power module is arranged in the junction box, the power module includes a voltage stabilizing circuit for converting 24V DC to 3.3V DC, the voltage stabilizing circuit includes a voltage stabilizing chip U2, a voltage stabilizing diode D1, a diode D2, a capacitor C1, a capacitor C2, an inductor L1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, an inductor L2 and a capacitor C8;

[0017] A first pin of the voltage regulator chip U2 is connected to the cathode of the voltage regulator diode D1 and the first end of the capacitor C1, the second end of the capacitor C1 is grounded, the anode of the voltage regulator diode D1 is connected to the external 24V DC power supply, the second pin of the voltage regulator chip U2 is connected to the cathode of the diode D2 and the first end of the inductor L1, the anode of the diode D2 is grounded, the third pin of the voltage regulator chip U2 is connected to the second end of the inductor L1, the first end of the capacitor C2, the first end of the capacitor C3 and the VCC power supply, the second end of the capacitor C2 and the second end of the capacitor C3 are both grounded, the ground pin of the voltage regulator chip U2 is connected to the first end of the capacitor C4, the first end of the capacitor C5, the first end of the capacitor C6, the first end of the capacitor C7 and the first end of the inductor L2, the second end of the capacitor C4, the second end of the capacitor C5, the second end of the capacitor C6 and the second end of the capacitor C7 are all connected to the VCC power supply, the second end of the inductor L2 is connected to the first end of the capacitor C8 and is grounded, and the second end of the capacitor C8 is grounded.

[0018] A further improvement of this technical solution is that the voltage stabilizing chip U2 adopts a voltage stabilizing chip of model XL1509-3.3.

[0019] The beneficial effect of the present invention is that, by highly integrating key modules such as air filtration, compression, processing, micro-control and power supply, the present invention significantly reduces the number of system components, optimizes the coordination between components, shortens the length of pipelines, and thus greatly improves the overall operating efficiency and reliability of the system. This design makes the system more compact and occupies less space, while reducing the complexity of the system and maintenance costs; at the same time, the connection method of the slide and the slide rail allows the air filter unit and the compressed air processing unit to be easily disassembled and replaced, reducing the difficulty and cost of maintenance. In addition, the present invention adopts an electric drive method, avoiding the high energy consumption and emission problems caused by traditional engine drive, and meets the high requirements of modern commercial vehicles for environmental protection and energy efficiency. Through optimized design, the system energy efficiency ratio is significantly improved and energy consumption is reduced. At the same time, the design of the desiccant storage box and the condensation channel effectively removes moisture and impurities in the compressed air, improves the purity and service life of the compressed air, and further enhances the environmental performance of the system.

[0020] In addition, the utility model has a reliable design principle, a simple structure and a very broad application prospect.

[0021] It can be seen that compared with the prior art, the present invention has outstanding substantial features and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the upper right top view of the compressed air supply system.

[0023] Figure 2 This is the lower right bottom view of the compressed air supply system.

[0024] Figure 3 This is the structural diagram of the air filter unit.

[0025] Figure 4 It is a cross-sectional schematic diagram of the compressed air processing unit.

[0026] Figure 5 This is the air flow diagram of the compressed air supply system.

[0027] Figure 6 This is the circuit schematic diagram of the micro-control module.

[0028] Figure 7 This is the schematic diagram of the motor control circuit and the solenoid valve control circuit.

[0029] Figure 8 This is the circuit schematic diagram of the power module.

[0030] 110 is the air filter unit, 111 is the slide rail, 112 is the filter housing, 113 is the porous cover plate, P1 is the gas pressure sensor, 114 is the sealing plate, 115 is the low-pressure ventilation pipe, 120 is the air compression unit, 121 is the slide groove, 122 is the compression housing, 123 is the high-pressure ventilation pipe, 130 is the compressed air processing unit, 131 is the processing housing, 1311 is the first accommodating chamber, 1312 is the second accommodating chamber, 1313 is the condensation channel, 1314 is the water discharge port, 132 is the pressure cover, 133 is the air outlet plate, 134 is the breathable net, 135 is the storage box, 1351 is the desiccant, 136 is the compression spring, 137 is the heating ceramic, 138 is the regeneration water discharge solenoid valve, 140 is the micro-control module, 141 is the junction box, 142 is the motor control circuit, and 143 is the solenoid valve control circuit. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] like Figure 1 、 Figure 2 and Figure 3As shown, the utility model provides a compressed air supply system for an electric commercial vehicle, comprising an air filter unit 110, an air compressor unit 120, a compressed air processing unit 130, a micro-control module 140 and a power supply module for supplying power to the entire system; the air filter unit 110, the air compressor unit 120 and the compressed air processing unit 130 are all connected to the micro-control module 140; the micro-control module 140 is installed above the air compressor unit 120, and two parallel slide grooves 121 are provided at the bottom end of the air compressor unit 120. 0 and the top of the air filter unit 110 are both provided with a slide rail 111 that matches the slide groove 121. The compressed air processing unit 130 and the air filter unit 110 are both detachably connected to the air compression unit 120. The low-pressure ventilation pipe 115 at the air outlet of the air filter unit 110 is connected to the air inlet of the air compression unit 120. The air outlet of the air compression unit 120 is connected to the air inlet of the compressed air processing unit 130 via the high-pressure ventilation pipe 123. The air outlet of the compressed air processing unit 130 is connected to the air-consuming components of the electric commercial vehicle. The slide rail 111 is provided with a hole that can be fixed to the slide groove 121 using bolts and nuts.

[0034] Specifically, the air filter unit 110 includes a filter housing 112, a porous cover plate 113, an air filter element and a gas pressure sensor. The filter housing 112 is a cylindrical structure. The porous cover plate 113 is installed at one end of the filter housing 112. A sealing plate 114 is provided at the end of the filter housing 112 away from the porous cover plate 113. The sealing plate 114 is provided with a connecting hole. The air inlet end of the low-pressure ventilation pipe 115 is connected to the connecting hole, and the air filter element is provided at the connecting hole; the gas pressure sensor is installed in the low-pressure ventilation pipe 115, and the gas pressure sensor is connected to the input end of the micro-control module 140. Its working principle is as follows: air enters the air filter section 110 through the porous cover plate 113, is filtered by the air filter element, and dust and other impurities are left on the surface of the air filter element, and then flows to the air compression section 120 through the low-pressure ventilation pipe 115; the gas pressure sensor uses an absolute pressure sensor, which measures the air pressure at the low-pressure ventilation pipe 115 and transmits the measured pressure data to the micro-control module 140.

[0035] In addition, the air compression unit 120 includes a compression housing 122 and an air compressor disposed within the compression housing 122. The air inlet of the air compressor is connected to the outlet of the low-pressure vent pipe 115, and the air outlet of the air compressor is connected to the inlet of the high-pressure vent pipe 123. The air compressor is an oil-free rocking piston air compressor with a two-cylinder or four-cylinder structure.

[0036] like Figure 4As shown, the compressed air processing unit 130 includes a processing shell 131, one end of the processing shell 131 is provided with a pressure cover 132 that is threadedly connected to the processing shell 131, and the end of the processing shell 131 away from the pressure cover 132 is provided with an air outlet plate 133, and the air outlet plate 133 is sealed with the processing shell 131. A first accommodating chamber 1311 and a second accommodating chamber 1312 are provided in the processing shell 131, and a truncated cone-shaped transparent chamber is provided between the first accommodating chamber 1311 and the second accommodating chamber 1312. The air net 134 is provided with a flexible air-permeable storage box 135 in the first accommodating chamber 1311. The storage box 135 stores a desiccant 1351. A compression spring 136 is provided between the storage box 135 and the pressure cover 132. Under the pressure of the pressure cover 132 and the compression spring 136, the storage box 135 can wrap the air-permeable net 134. A spiral condensation channel 1313 is provided on the inner wall of the processing shell 131. An electric heating wire is provided in the condensation channel 1313. The top side wall of the processing shell 131 is provided with a spiral condensation channel 1313. A slide rail 111 is provided to be connected with the slide groove 121. A drain port 1314 is provided on the processing shell 131 on the opposite side of the slide rail 111. The drain port 1314 is located at the lowest position of the condensation channel 1313. The drain port 1314 is connected to the first accommodating chamber 1311. A heating ceramic 137 is provided between the drain port 1314 and the first accommodating chamber 1311. A regeneration drain solenoid valve 138 is provided in the drain port 1314 away from the first accommodating chamber 1311. , the regeneration and draining solenoid valve 138 is connected to the output end of the micro-control module 140, and the heating ceramic 137 is connected to the electric heating wire; a plurality of air outlets are provided in the second accommodating chamber 1312, each of which is equipped with an air outlet solenoid valve, and the air outlets are connected to the corresponding air-using components of the electric commercial vehicle, and the air-using components are equipped with an air storage tank, that is, five air supply circuits, namely the first circuit to the fifth circuit, are provided between the second accommodating chamber 1312 and the air-using components. Accordingly, the overall air flow direction of the system is as follows Figure 5 shown.

[0037] like Figure 6 As shown, the micro-control module 140 includes a junction box 141 and a main control chip U1, a motor control circuit 142, a solenoid valve control circuit 143 and a heating control circuit arranged in the junction box 141; Figure 7As shown, the main control chip U1 is connected to the air compressor via a motor control circuit 142. The regeneration water drain solenoid valve 138 and the air outlet solenoid valve are both connected to the main control chip U1 via a solenoid valve control circuit 143. The heating ceramic 137 is also connected to the main control chip U1 via a heating control circuit. A waterproof and dustproof junction box 141 is mounted on top of the compressor housing 122. The three wiring holes on the junction box 141 correspond to the vehicle's U, V, and W three-phase lines. The main control chip U1 uses an STM32F103C8T6 single-chip microcomputer, which is also connected to peripheral circuits, including a clock circuit, a startup circuit (including a startup switch S1), and a mode selection circuit (including a selection switch S2).

[0038] The motor control circuit 142 includes an electromagnetic relay K1, and the main control chip U1 is connected to the air compressor through the electromagnetic relay K1. The solenoid valve control circuit 143 includes six solenoid valve control sub-circuits. Each solenoid valve (YV1, YV2, YV3, YV4, YV5 or YV6) corresponds to a solenoid valve control sub-circuit including a field effect transistor (using an N-channel MOS transistor). The heating control circuit includes a MOS transistor Q7, and the main control chip U1 is connected to the heating ceramic 137PTC1 through the MOS transistor Q7.

[0039] Specifically, the motor control circuit includes an electromagnetic relay K1 and a diode D4. The input end of the electromagnetic relay K1 is connected to the first pin of the main control chip U1, the power end of the electromagnetic relay K1 is connected to the external 24V DC power, the ground end of the electromagnetic relay K1 is connected to the positive pole of the diode D4, the negative pole of the diode D4 is grounded, the first end of the main contact of the electromagnetic relay K1 is connected to the external three-phase power supply, and the first end of the main contact of the electromagnetic relay K1 is connected to the air compressor.

[0040] The solenoid valve control circuit includes 6 solenoid valve control sub-circuits, and the solenoid valve control sub-circuit includes a first resistor, a second resistor, a field effect transistor and a first diode; the first end of the first resistor is connected to the output pin of the main control chip U1, the second end of the first resistor is connected to the first end of the second resistor and the gate of the field effect transistor, the second end of the second resistor is grounded, the source of the field effect transistor is grounded, the drain of the field effect transistor is connected to the first end of the solenoid valve and the positive pole of the first diode, and the second end of the solenoid valve and the negative pole of the first diode are both connected to an external 24V DC power supply. Among them, the first resistor includes resistor R5, resistor R7, resistor R9, resistor R11, resistor R13 and resistor R15, the second resistor includes resistor R6, resistor R8, resistor R10, resistor R12, resistor R14 and resistor R16, the field effect transistor includes field effect transistor Q1, field effect transistor Q2, field effect transistor Q3, field effect transistor Q4, field effect transistor Q5 and field effect transistor Q6, and the first diode includes diode D10, diode D11, diode D12, diode D13, diode D14 and diode D15.

[0041] The heating control circuit includes a resistor R17, a resistor R18 and a field effect transistor Q7. The first end of the resistor R17 is connected to the output pin of the main control chip U1, the second end of the resistor R17 is connected to the first end of the resistor R18 and the gate of the field effect transistor Q7, the second end of the resistor R18 is grounded, the source of the field effect transistor Q7 is grounded, the drain of the field effect transistor Q7 is connected to the first end of the heating ceramic 137, and the second end of the heating ceramic 137 is connected to an external 24V DC power supply.

[0042] like Figure 8As shown, the power module is arranged in the junction box 141, and the power module includes a voltage stabilizing circuit for converting 24V DC to 3.3V DC. The voltage stabilizing circuit includes a voltage stabilizing chip U2, a voltage stabilizing diode D1, a diode D2, a capacitor C1, a capacitor C2, an inductor L1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, an inductor L2 and a capacitor C8; a first pin of the voltage stabilizing chip U2 is connected to the cathode of the voltage stabilizing diode D1 and the first end of the capacitor C1, a second end of the capacitor C1 is grounded, a positive electrode of the voltage stabilizing diode D1 is connected to an external 24V DC, and a second pin of the voltage stabilizing chip U2 is connected to the cathode of the diode D2 and the first end of the inductor L1 The positive electrode of diode D2 is grounded. The third pin of voltage regulator chip U2 is connected to the second end of inductor L1, the first end of capacitor C2, the first end of capacitor C3, and the VCC power supply. The second end of capacitor C2 and the second end of capacitor C3 are both grounded. The ground pin of voltage regulator chip U2 is connected to the first end of capacitor C4, the first end of capacitor C5, the first end of capacitor C6, the first end of capacitor C7, and the first end of inductor L2. The second end of capacitor C4, the second end of capacitor C5, the second end of capacitor C6, and the second end of capacitor C7 are all connected to the VCC power supply. The second end of inductor L2 is connected to the first end of capacitor C8 and grounded. The second end of capacitor C8 is grounded. Among them, voltage regulator chip U2 uses the voltage regulator chip model XL1509-3.3.

[0043] Under different working conditions, the specific working states of the system proposed by the present invention are as follows:

[0044] ① During normal air pumping operation, the main control chip U1 outputs an action signal to the electromagnetic relay K1, closing its contacts and commencing operation of the compressed air processing unit 130. The main control chip U1 also outputs electrical signals to the MOS transistors Q1, Q2, Q3, Q4, and Q5, which control the opening of the corresponding solenoid valves in the first through fifth circuits. At this point, air is filtered by the air filter 110, pressurized by the air compressor, and pumped into the compressed air processing unit 130. Some moisture is retained in the spiral condensation channel 1313. After drying by the desiccant 1351, the air is compressed into the air storage tanks of the five air supply circuits for storage. When the pressures in the air storage tanks of all five air supply circuits reach the set values ​​in the control chip, the main control chip U1 controls the five MOS transistors Q1-Q5 to close the solenoid valves in the first through fifth circuits, maintaining pressure. Simultaneously, the main control chip U1 stops outputting the action signal to the electromagnetic relay K1, causing the compressed air processing unit 130 to cease operation, thereby achieving energy conservation, environmental protection, and extending system life.

[0045] ② When the cumulative operating time exceeds the set value, the compressed air processing unit 130 enters regeneration preparation mode. The main control chip U1 receives and analyzes the vehicle's CAN communication data to determine the vehicle's status. If the vehicle is parked and the parking brake is engaged, it enters regeneration mode. At this time, the solenoid valves of the first through fourth circuits are all closed, and the main control chip U1 controls the water outlet 1314 to heat the heating ceramic 137 and the main heating coil to begin heating, performing the defrost operation. After the defrost set time expires, the main control chip U1 outputs an electrical signal to MOS transistors Q5 and Q6, causing the fifth circuit solenoid valve and the water and exhaust solenoid valve to open. The high-pressure air in the fifth circuit air tank passes through the fifth circuit solenoid valve and rapidly flows through the desiccant 1351, removing some of the moisture on the desiccant 1351. At the same time, it carries with it moisture at the water outlet 1314, flows out of the air pipeline through the regeneration water outlet solenoid valve 138 and the muffler, completing the regeneration process.

[0046] ③ If a leak or failure occurs in a circuit, the pressure in that circuit drops continuously over a short period of time. At this time, the main control chip U1 determines that it is not in regeneration mode, and the system enters fault emergency mode. In this mode, the main control chip U1 closes the solenoid valve of the faulty circuit based on the circuit pressure changes and simultaneously sends a fault code to the vehicle CAN bus. The faulty circuit will not be opened until the fault code is cleared. Except for the abnormal circuit, the remaining circuits will continue to pump air normally, and the regeneration standby mode will not be entered again until the fault code is cleared.

[0047] The above disclosure is only a preferred embodiment of the present invention, but the present invention is not limited thereto. Any non-creative changes that can be thought of by technicians in this field, as well as several improvements and modifications made without departing from the principles of the present invention, should fall within the scope of protection of the present invention.

Claims

1. A compressed air supply system for an electric commercial vehicle, characterized in that: It includes an air filtration unit, an air compression unit, a compressed air processing unit, a micro-control module and a power module for supplying power to the entire system; the air filtration unit, the air compression unit and the compressed air processing unit are all connected to the micro-control module; The micro-control module is installed above the air compression unit. Two parallel slide grooves are provided at the bottom of the air compression unit. The top of the compressed air processing unit and the top of the air filter unit are both provided with slide rails matching the slide grooves. The compressed air processing unit and the air filter unit are both detachably connected to the air compression unit; the low-pressure ventilation pipe at the air outlet of the air filter unit is connected to the air inlet of the air compression unit, the air outlet of the air compression unit is connected to the air inlet of the compressed air processing unit through the high-pressure ventilation pipe, and the air outlet of the compressed air processing unit is connected to the air-consuming components of the electric commercial vehicle.

2. The compressed air supply system for an electric commercial vehicle according to claim 1, characterized in that: The air filtration unit includes a filter housing, a porous cover plate, an air filter element and a gas pressure sensor. The filter housing is a cylindrical structure. The porous cover plate is installed at one end of the filter housing. A sealing plate is provided at the end of the filter housing away from the porous cover plate. A connecting hole is provided on the sealing plate. The air inlet end of the low-pressure ventilation pipe is connected to the connecting hole, and the air filter element is provided at the connecting hole; the gas pressure sensor is installed in the low-pressure ventilation pipe, and the gas pressure sensor is connected to the input end of the micro-control module.

3. The compressed air supply system for an electric commercial vehicle according to claim 1, wherein: The air compression unit includes a compression shell and an air compressor arranged in the compression shell, the air inlet of the air compressor is connected to the air outlet end of the low-pressure ventilation pipe, and the air outlet of the air compressor is connected to the air inlet end of the high-pressure ventilation pipe.

4. The compressed air supply system for an electric commercial vehicle according to claim 3, characterized in that: The compressed air processing unit includes a processing shell, one end of the processing shell is provided with a pressure cover threadedly connected to the processing shell, the end of the processing shell away from the pressure cover is provided with an air outlet plate, the air outlet plate is sealed and connected to the processing shell, a first accommodating chamber and a second accommodating chamber are provided in the processing shell, a truncated cone-shaped air permeable net is provided between the first accommodating chamber and the second accommodating chamber, a flexible air permeable storage box is provided in the first accommodating chamber, a desiccant is stored in the storage box, a compression spring is provided between the storage box and the pressure cover, and the storage box can wrap the air permeable net under the pressure of the pressure cover and the compression spring; a spiral condensation channel is provided on the inner wall of the processing shell, and a spiral condensation channel is provided in the condensation channel. There is an electric heating wire; a slide rail connected to the slide groove is provided on the top side wall of the processing shell, and a drain port is provided on the processing shell on the opposite side of the slide rail. The drain port is located at the lowest position of the condensation channel, and the drain port is connected to the first accommodating chamber. A heating ceramic is provided between the drain port and the first accommodating chamber, and a regeneration drain solenoid valve is provided in the drain port away from the first accommodating chamber. The regeneration drain solenoid valve is connected to the output end of the micro-control module, and the heating ceramic is connected to the electric heating wire; a plurality of air outlets are provided in the second accommodating chamber, and an air outlet solenoid valve is installed in each air outlet, and the air outlet is connected to the corresponding gas-applying components of the electric commercial vehicle.

5. The compressed air supply system for an electric commercial vehicle according to claim 4, characterized in that: The micro-control module includes a junction box and a main control chip U1, a motor control circuit, a solenoid valve control circuit and a heating control circuit arranged in the junction box; the main control chip U1 is controlled and connected to the air compressor through the motor control circuit, the regeneration water discharge solenoid valve and the air outlet solenoid valve are both controlled and connected to the main control chip U1 through the solenoid valve control circuit, and the heating ceramic is controlled and connected to the main control chip U1 through the heating control circuit.

6. The compressed air supply system for an electric commercial vehicle according to claim 5, characterized in that: The main control chip U1 uses a single-chip microcomputer model STM32F103C8T6.

7. The compressed air supply system for an electric commercial vehicle according to claim 5, characterized in that: The motor control circuit includes an electromagnetic relay K1 and a diode D4. The input end of the electromagnetic relay K1 is connected to the first pin of the main control chip U1, the power end of the electromagnetic relay K1 is connected to the external 24V DC power, the ground end of the electromagnetic relay K1 is connected to the positive pole of the diode D4, the negative pole of the diode D4 is grounded, the first end of the main contact of the electromagnetic relay K1 is connected to the external three-phase power supply, and the first end of the main contact of the electromagnetic relay K1 is connected to the air compressor.

8. The compressed air supply system for an electric commercial vehicle according to claim 5, characterized in that: The solenoid valve control circuit includes a plurality of solenoid valve control sub-circuits, each of which includes a first resistor, a second resistor, a field effect transistor, and a first diode; The first end of the first resistor is connected to the output pin of the main control chip U1, the second end of the first resistor is connected to the first end of the second resistor and the gate of the field effect tube, the second end of the second resistor is grounded, the source of the field effect tube is grounded, the drain of the field effect tube is connected to the first end of the solenoid valve and the positive pole of the first diode, and the second end of the solenoid valve and the negative pole of the first diode are both connected to the external 24V DC power.

9. The compressed air supply system for an electric commercial vehicle according to claim 1, wherein: The power module is arranged in the junction box. The power module includes a voltage stabilizing circuit for converting 24V DC to 3.3V DC. The voltage stabilizing circuit includes a voltage stabilizing chip U2, a voltage stabilizing diode D1, a diode D2, a capacitor C1, a capacitor C2, an inductor L1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, an inductor L2, and a capacitor C8. A first pin of the voltage regulator chip U2 is connected to the cathode of the voltage regulator diode D1 and the first end of the capacitor C1, the second end of the capacitor C1 is grounded, the anode of the voltage regulator diode D1 is connected to the external 24V DC power supply, the second pin of the voltage regulator chip U2 is connected to the cathode of the diode D2 and the first end of the inductor L1, the anode of the diode D2 is grounded, the third pin of the voltage regulator chip U2 is connected to the second end of the inductor L1, the first end of the capacitor C2, the first end of the capacitor C3 and the VCC power supply, the second end of the capacitor C2 and the second end of the capacitor C3 are both grounded, the ground pin of the voltage regulator chip U2 is connected to the first end of the capacitor C4, the first end of the capacitor C5, the first end of the capacitor C6, the first end of the capacitor C7 and the first end of the inductor L2, the second end of the capacitor C4, the second end of the capacitor C5, the second end of the capacitor C6 and the second end of the capacitor C7 are all connected to the VCC power supply, the second end of the inductor L2 is connected to the first end of the capacitor C8 and is grounded, and the second end of the capacitor C8 is grounded.

10. The compressed air supply system for an electric commercial vehicle according to claim 9, characterized in that: The voltage regulator chip U2 uses the voltage regulator chip model XL1509-3.3.

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