An integrated air compressor and air suspension system

Abstract

The utility model relates to air compression equipment technical field, specifically disclose an integrated air compressor and air suspension system, wherein integrated air compressor includes drive motor, air compression unit and solenoid valve group, the one end of motor shaft of drive motor is connected the crankshaft of air compression unit, to make air compression unit operation compressed air, air compression unit includes two piston unit bodies, and piston unit body all includes cylinder, reciprocating motion along the piston of cylinder and one end connecting piston connecting rod, the other end of connecting rod rotatoryly arranged on the crankshaft, and the phase angle of two pistons is 180 degrees apart to offset inertial force, solenoid valve group is arranged in the valve block with air compression unit gas circuit connection, and the valve block has gas passage for forming gas circuit, and the air after air compression unit compression is distributed by solenoid valve group via gas passage, the utility model effectively reduces air compressor noise and compact structure.

Description

Technical Field

[0001] This utility model relates to the field of air compression device technology, specifically to an integrated air compressor and air suspension system. Background Technology

[0002] The air supply unit, as a core component of the air suspension system, compresses air and inflates it to the air springs or air tank. Existing air compressors mainly consist of an air compressor, valves, an air dryer, an electronic control board, and a motor. They typically suffer from the following drawbacks:

[0003] (1) The two sets of pistons in the air supply device valve pump integrated machine used in the air suspension system on the market (see patent CN106232398A) move in the same direction. The inertial forces are superimposed on each other, which will generate large vibration and noise. In addition, because the valve plate is constantly opening and closing during the operation, the valve plate will collide with the piston connecting rod continuously, generating large noise and affecting the working performance of the air compressor.

[0004] (2) In addition, the two sets of pistons are arranged in opposite directions, and the pistons are longer in the axial direction, which makes the air compressor occupy a large area in this axial direction, which is not conducive to the integrated spatial distribution. Furthermore, the various components of the air compressor are connected together in an independent manner, resulting in low installation efficiency, low integration, unreasonable space utilization, and inability to meet the requirements of lightweighting.

[0005] Therefore, the present invention aims to provide a gas supply device with low noise and high integration. Summary of the Invention

[0006] Therefore, this utility model provides an integrated air compressor and air suspension system to solve the above-mentioned defects in the prior art.

[0007] The first aspect of this utility model provides an integrated air compressor, including a drive motor, an air compression unit, and a solenoid valve assembly;

[0008] One end of the motor shaft of the drive motor is connected to the crankshaft of the air compression unit so that the air compression unit can operate to compress air;

[0009] The air compression unit includes two piston units, each of which includes a cylinder, a piston that reciprocates along the cylinder, and a connecting rod connected to the piston at one end. The other end of the connecting rod is rotatably mounted on the crankshaft, and the two pistons are 180° out of phase to counteract inertial forces.

[0010] The solenoid valve assembly is arranged in a valve block connected to the air passage of the air compression unit. The valve block has a gas passage for forming an air passage, and the air compressed by the air compression unit is distributed by the solenoid valve assembly through the gas passage.

[0011] In one embodiment of this utility model, the valve block is at least partially disposed on one side of the housing of the drive motor, and the valve block is disposed adjacent to the air compression unit.

[0012] In one embodiment of this utility model, the interior of the cylinder body is configured as a piston chamber and an exhaust chamber that are interconnected through an exhaust port. The exhaust chamber is connected to an exhaust unit, and the exhaust unit is connected to a gas passage in the valve block. The piston chamber is connected to an intake unit, and air is unidirectionally transported along the intake unit, piston chamber, exhaust chamber, and exhaust unit.

[0013] In one embodiment of this utility model, a one-way exhaust valve assembly is further included, which is disposed at the exhaust port. The one-way exhaust valve assembly is used to control the piston chamber to exhaust in one direction to the exhaust chamber. The piston chamber and the exhaust chamber are separated by a partition plate disposed in the cylinder body. The one-way exhaust valve assembly includes a valve plate two mounted on the surface of the partition plate. The opening and closing part of the valve plate two faces the exhaust port on the partition plate. A buffer gasket is provided on the opposite surface of the valve plate two and the partition plate.

[0014] In one embodiment of this utility model, a one-way intake valve assembly is further included, which is disposed on one side of the intake port on the piston. A crankcase is disposed below the cylinder block. The intake port connects the piston chamber and the inner cavity of the crankcase. The one-way intake valve assembly is used to control the crankcase to unidirectionally intake air into the piston chamber. The one-way intake valve assembly includes a valve plate first mounted on the piston surface. The opening and closing part of the valve plate first is directly opposite the intake port. A buffer pad is disposed on the opposite surface of the valve plate first and the piston.

[0015] In one embodiment of this utility model, a noise-reducing cylinder head is provided on the top of the cylinder.

[0016] In one embodiment of this utility model, an air dryer is also included. The air dryer is connected to the valve block. The air compressed by the air compression unit is connected to the inlet of the air dryer through the gas channel. The outlet of the air dryer is connected to the solenoid valve group in the valve block through the gas channel.

[0017] In one embodiment of the present invention, a controller is further included. The controller is disposed on the same side of the solenoid valve group and the drive motor, and is electrically connected to both the solenoid valve group and the drive motor.

[0018] In one embodiment of this utility model, the valve block is further provided with a gas pipe connector 1 connected to a gas storage tank, an exhaust port, and several gas pipe connectors 2 connected to corresponding air springs. The gas passage includes:

[0019] Air passage one, with its two ends connected to the air inlet end of the air pipe connector one and the air inlet side of the air compression unit respectively, and a solenoid valve one is provided on the air passage one;

[0020] Air passage two, with its two ends connected to the air inlet end of the air pipe connector one and the air outlet end of the air dryer respectively, and solenoid valve two is provided on air passage two;

[0021] Air passage four, one end of which is connected to the air outlet of the air dryer, and the other end of air passage four is connected to the corresponding air pipe connector two through several air passage five. Each air passage five is equipped with a solenoid valve four, and each air passage four is equipped with a solenoid valve three.

[0022] Air passage three, whose two ends are respectively connected to the air intake side of the air compression unit and the solenoid valve three, the solenoid valve three being a two-position three-way solenoid valve;

[0023] An exhaust gas path is provided, with one end connected to the exhaust port and the other end connected to the gas path between the air compression unit and the air dryer. A solenoid valve is installed on the exhaust gas path.

[0024] The intake air passage is connected at both ends to the atmosphere and the intake side of the air compression unit, respectively.

[0025] A second aspect of this utility model provides an air suspension system, including any of the integrated air compressors described above.

[0026] This utility model has the following advantages:

[0027] (1) The air compressor of this utility model distributes two sets of piston units on the same side of the crankshaft at one end of the drive motor, which shortens the axial length of the piston, optimizes the axial space of the air compressor, and the two sets of pistons run in opposite directions, so the inertial forces cancel each other out, which improves the stability of the device operation and effectively reduces noise and extends the service life of the machine.

[0028] In addition, by constructing piston chambers and exhaust chambers inside the cylinder block, not only can the working efficiency of the cylinder be improved and its stable operation be ensured, but the noise reduction cylinder head set at its top can also buffer the airflow and reduce noise; and the valve plates of the one-way intake valve group and the one-way exhaust valve group act on the buffer pad during operation, reducing the mechanical noise of the compressor valve plate knocking, thus reducing the overall noise generated during air compression.

[0029] (2) The valve block, air dryer and controller of this utility model are integrated on one side of the air compression unit and the drive motor in a space-saving manner. Due to the close cooperation between the various mechanisms and the compact layout, the integration of the device is improved. Attached Figure Description

[0030] Figure 1 This is an isometric view of the integrated air compressor of this utility model;

[0031] Figure 2 This is an isometric view of the integrated air compressor of this utility model from another perspective;

[0032] Figure 3 This is a cross-sectional structural diagram of the integrated air compressor of this utility model;

[0033] Figure 4 This is an exploded structural diagram of the cylinder of this utility model;

[0034] Figure 5 This utility model Figure 3 Enlarged structural diagram of part A in the middle;

[0035] Figure 6 This is a schematic diagram of the air circuit connection of the integrated air compressor of this utility model.

[0036] 100-Integrated air compressor; 2-Air dryer; 3-Drive motor; 301-Motor shaft; 302-Connecting end; 4-Crankshaft case; 5-Air compression unit; 6-Valve block; 9-Controller; 10-Air tank; X-Axis axis one; X'-Axis axis two; Z-Axis axis three; 20-Air spring;

[0037] 501 - Valve Plate 1; 502 - Crankshaft; 503 - Ball Bearing; 504 - Piston; 506 - Rotary Bearing; 507 - Piston Chamber; 509 - Cylinder Block; 510 - Intake Port; 511 - Exhaust Passage; 512 - Connecting Rod; 513 - Partition Plate; 514 - Noise Reduction Cylinder Head; 515 - Exhaust Port; 516 - Valve Plate 2; 517 - Exhaust Chamber;

[0038] 601 - Air Inlet; 602 - Air Pipe Connector 1; 603 - Exhaust Port; 604 - Air Pipe Connector 2; 605 - Airway 1; 606 - Airway 2; 607 - Airway 3; 608 - Airway 4; 609 - Airway 5; 610 - Pressure Sensor; 611 - Solenoid Valve 1; 612 - Solenoid Valve 2; 613 - Solenoid Valve 3; 614 - Solenoid Valve 4; 615 - Exhaust Airway; 616 - Solenoid Valve 5; 617 - Air Inlet Airway; 618 - Safety Valve; 619 - One-way Inlet Valve. Detailed Implementation

[0039] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0040] The air compressors used in air suspension systems on the market (see patent CN106232398A) mostly have two sets of pistons moving in the same direction. The inertial forces are superimposed, which will generate greater vibration and noise. In addition, the two sets of pistons are arranged in opposite directions, and the pistons are longer in the axial direction. This also makes the air compressor occupy a large area in this axial direction, which is not conducive to integrated spatial distribution.

[0041] like Figures 1 to 5 As shown, the first aspect of this utility model provides an integrated air compressor 100, which has the functions of compressing air and distributing the compressed gas. It can be applied to air suspension systems to provide compressed gas for devices such as air springs and air tanks, but its application is not limited to the field of air suspension systems.

[0042] In this embodiment of the application, the integrated air compressor 100 includes a drive motor 3, an air compression unit 5, and a solenoid valve group. The air compressed by the air compression unit 5 is distributed through the solenoid valve group.

[0043] In this embodiment of the present invention, one end of the motor shaft 301 of the drive motor 3 is connected to the crankshaft 502 of the air compression unit 5 so that the air compression unit 5 can operate compressed air.

[0044] It should be noted that the integrated air compressor 100 given in this embodiment of the present invention is a piston compressor. The drive motor 3 drives the crankshaft 502 to rotate, so that the connecting rod piston connected to it reciprocates to compress the gas.

[0045] In some embodiments, the drive motor 3 can be a brushless motor or a brushed motor. In this invention, a brushless motor is preferred. With the advantages of low noise, high energy efficiency and durability of the brushless motor, the integrated air compressor 100 is improved in terms of noise control, which can improve the operating efficiency of the air compressor.

[0046] To reduce noise, in this embodiment, the air compression unit 5 includes two piston units. Each piston unit includes a cylinder, a piston 504 that reciprocates along the cylinder, and a connecting rod 512 connected at one end to the piston 504. The other end of the connecting rod 512 is rotatably mounted on the crankshaft 502. In this application, the connecting rod 512 and the crankshaft 502 are connected by a rotary bearing 506 to ensure smooth operation of the piston unit.

[0047] Furthermore, the two pistons 504 are 180° out of phase to counteract inertial forces. For example, the first axis X and the second axis X' of the two sets of pistons are parallel to each other. The third axis Z of the motor shaft 301 is perpendicular to both the first axis X and the second axis X'.

[0048] Because the two sets of pistons move in opposite directions, their inertial forces cancel each other out, reducing vibration during air compression, improving operational stability, effectively reducing noise, and extending the machine's service life. Furthermore, since the two sets of pistons are distributed on the same side of the crankshaft 502, the axial length of the air compression unit 5 is shortened, optimizing its axial space.

[0049] In some embodiments, a crankcase 4 is mounted below the cylinder, and a crankshaft 502 is mounted in the crankcase 4.

[0050] For example, one end of the crankshaft 502 away from the drive motor 3 is connected to the inner wall of the crankcase 4 by a ball bearing 503, and the other end of the crankshaft 502 is connected to the connecting end 302 of the motor shaft 301.

[0051] In this embodiment of the utility model, the crankshaft 502 is manufactured by integral molding, including but not limited to casting, integral die casting or CNC machining.

[0052] In other embodiments, the crankshaft 502 may also be assembled by splicing.

[0053] In this embodiment, the solenoid valve assembly is arranged in a valve block 6 connected to the air compression unit 5. The valve block 6 has a gas channel for forming an air path, which can form a control pipeline that cooperates with the solenoid valve assembly.

[0054] The air compressed by the air compression unit 5 is distributed by the solenoid valve group through the gas channel.

[0055] In some embodiments, the valve block 6 may be arranged separately from the drive motor 3 and the air compression unit 5 (not shown in the figure) according to the actual space requirements, and the structures are interconnected through a medium channel (gas).

[0056] In other embodiments, the valve block 6 is mounted on the housing of the air compression unit 5 or the drive motor 3. This allows the valve block 6 to be integrated with the air compression unit 5 and the drive motor 3, reducing the size of the device and meeting the demand for compact air compressors, particularly in vehicles.

[0057] For example, the valve block 6 is at least partially disposed on one side of the housing of the drive motor 3, and the valve block 6 is disposed adjacent to the air compression unit 5. This configuration makes the air compressor layout compact and reduces the space occupied, especially when the integrated air compressor 100 is applied to a vehicle, it can reduce the space occupied in the vehicle interior.

[0058] In some embodiments of this application, to further improve the noise reduction effect, the interior of the cylinder body 509 is configured as a piston chamber 507 and an exhaust chamber 517 that are interconnected through an exhaust port 515. Adding an exhaust chamber 517 can further reduce noise.

[0059] The exhaust chamber 517 is connected to the exhaust unit, which is connected to the gas passage in the valve block 6. The piston chamber 507 is connected to the intake unit, and air is transported unidirectionally along the intake unit, piston chamber 507, exhaust chamber 517 and exhaust unit.

[0060] For example, the air intake 601 of the intake unit can be located on the crankcase 4, or it can be located in other parts depending on the specific production situation. In some other embodiments, it can also be located on the valve block 6.

[0061] As one possible implementation, the integrated air compressor 100 of this application further includes a one-way exhaust valve assembly disposed at the exhaust port 515, the one-way exhaust valve assembly being used to control the one-way exhaust from the piston chamber 507 to the exhaust chamber 517. Example:

[0062] The piston chamber 507 and the exhaust chamber 517 are separated by a partition plate 513 disposed within the cylinder body 509. The one-way exhaust valve assembly includes a second valve plate 516 mounted on the surface of the partition plate 513. The opening and closing portion of the second valve plate 516 faces the exhaust hole 515 on the partition plate 513. A buffer pad (not shown in the figure) is provided on the opposite surface of the second valve plate 516 and the partition plate 513.

[0063] In one possible design provided in this application embodiment, the integrated air compressor 100 of this application further includes a one-way intake valve assembly, which is used to control the unidirectional flow of gas from the intake unit into the piston chamber 507. Example:

[0064] The one-way intake valve assembly is located on one side of the intake port 510 on the piston 504. The intake port 510 connects the piston chamber 507 and the inner cavity of the crankcase 4. The one-way intake valve assembly is used to control the crankcase 4 to intake air into the piston chamber 507 in one direction.

[0065] In some embodiments, the one-way intake valve assembly includes a valve plate 501 mounted on the surface of the piston 504. The opening and closing portion of the valve plate 501 is directly opposite the intake port 510, and a buffer pad (not shown in the figure) is provided on the opposite surfaces of the valve plate 501 and the piston 504.

[0066] The function of the buffer pad is to reduce the noise generated during the opening and closing process between the valve plate and its opposite surface.

[0067] In some embodiments, the buffer pad is preferably disposed on the surfaces of the partition plate 513 and the piston 504 on the corresponding sides. For example, a limiting groove can be formed on the surfaces of the partition plate 513 and the piston 504 on the corresponding sides, and then the valve plate can be installed therein by overmolding.

[0068] In other embodiments, both valve plate 501 and valve plate 516 are mosquito coil valve plates. Compared with ordinary valve plates, mosquito coil valve plates have higher toughness, fatigue resistance, wear resistance, corrosion resistance, high temperature resistance, and dimensional stability.

[0069] When the integrated air compressor 100 is working, the drive motor 3 drives the crankshaft 502 to drive the connecting rod 512 to operate, thereby driving the piston 504 to reciprocate along the piston chamber 507. When the space of the piston chamber 507 increases, the valve plate 1 501 opens, and the air entering from the intake port 601 enters the piston chamber 507 through the crankcase 4 and the intake port 510. At this time, the valve plate 2 516 closes. When the space of the piston chamber 507 decreases, the valve plate 1 501 closes, and the compressed air in the piston chamber 507 enters the exhaust chamber 517 through the exhaust port 515 and the opened valve plate 2 516. The compressed air finally flows into the gas passage of the valve block 6 from the exhaust passage 511.

[0070] It should be noted that in this application, the exhaust passage 511 is a gas medium passage connecting the exhaust chamber 517 and the gas passage in the valve block 6. The gas inlet of the exhaust passage 511 is located on the side wall of the exhaust chamber 517.

[0071] In the embodiments of this application, the exhaust passage 511 can be formed in the housing structure of the air compression unit 5, and when the valve block 6 is positioned relative to the air compression unit 5, a sealing structure is provided on their contacting surfaces to achieve a sealed air passage connection between the two. This eliminates the need for additional piping, making the entire device simpler, more organized, and free of redundancy.

[0072] In other embodiments, the exhaust passage 511 may also be connected via a separate conduit.

[0073] When the integrated air compressor 100 is working, when the connecting rod 512 of the left piston unit is at its highest point, the piston chamber 507 of the left piston unit is in a compressed air state. At the same time, the connecting rod 512 of the right side is at its lowest point, and the piston chamber 507 of the right side is in a suction state. As the drive motor 3 rotates, the suction and compressed air states of the left and right piston chambers 507 are switched, and this cycle continues. The twin-cylinder air compressor has significant advantages in providing smooth operation, reducing noise, and adapting to large-displacement applications.

[0074] In another embodiment of the application, a noise-reducing cylinder head 514 is disposed on top of the cylinder. Exemplarily, the noise-reducing cylinder head 514 is constructed as an outwardly convex dome to improve noise reduction. The noise-reducing cylinder head 514 may also be constructed in other ways to buffer airflow.

[0075] In some embodiments of this utility model, the integrated air compressor 100 further includes a controller 9. The controller 9 is arranged on the same side of the solenoid valve group and the drive motor 3 in a way that saves wiring, and is electrically connected to both the solenoid valve group and the drive motor 3, which can reduce the circuit layout. Of course, the controller 9 can also be installed in other locations according to actual production needs.

[0076] The controller 9 integrates at least a control program for controlling the solenoid valve assembly and driving the motor 3. Furthermore, the controller 9 communicates via the CAN protocol.

[0077] In some other embodiments of this utility model, the integrated air compressor 100 further includes an air dryer 2, which is connected to the valve block 6. The air compressed by the air compression unit 5 communicates with the inlet of the air dryer 2 through the gas channel, and the outlet of the air dryer 2 communicates with the solenoid valve assembly within the valve block 6 through the gas channel. The gas compressed by the air compression unit 5 is dried by the air dryer 2 and then distributed by the solenoid valve assembly.

[0078] This structure reduces the need for gas connection pipes, improves airtightness while lowering costs, and also increases the assembly efficiency of the device.

[0079] The air dryer 2 may have one or more drying tanks, the interior of which is filled with drying molecular sieves (mainly in granular form, which dehumidify and remove water through physical adsorption). Preferably, there are two drying tanks, and the two drying tanks are integrated into one unit to improve the degree of integration.

[0080] In some embodiments, the air dryer 2 may be arranged separately from the main body of the integrated air compressor 100.

[0081] In other embodiments, the air dryer 2 may also be integrated with the valve block 6, so that several components of the entire integrated air compressor 100 are integrated together in a space-saving manner to improve its integration and simplify the layout of gas pipelines.

[0082] In the embodiments of this utility model, such as Figure 6 As shown, the valve block 6 is also provided with an exhaust port 603, an air pipe connector 602 connected to the air tank 10, and several air pipe connectors 604 connected to the corresponding air springs 20.

[0083] For example, the gas passage on valve block 6 includes:

[0084] Air passage 605, with its two ends connected to the air inlet end of air pipe connector 602 and the air inlet side of air compression unit 5 respectively, and solenoid valve 611 is provided on air passage 605.

[0085] Air passage 2 606, with its two ends connected to the air inlet end of air pipe connector 1 602 and the air outlet end of air dryer 2 respectively, and solenoid valve 2 612 is provided on air passage 2 606.

[0086] Air passage 4 608, one end of which is connected to the air outlet of the air dryer 2, and the other end of the air passage 4 608 is connected to the corresponding air pipe connector 2 604 through several air passages 5 609. Each air passage 5 609 is equipped with a solenoid valve 4 614, and the air passage 4 608 is equipped with a solenoid valve 3 613.

[0087] Air passage 3 607, its two ends are respectively connected to the air intake side of the air compression unit 5 and the solenoid valve 3 613, the solenoid valve 3 613 is a two-position three-way solenoid valve;

[0088] The exhaust air passage 615 has one end connected to the exhaust port 603 and the other end connected to the air passage between the air compression unit 5 and the air dryer 2. The exhaust air passage 615 is equipped with a solenoid valve 616.

[0089] The intake air passage 617 has its two ends connected to the atmosphere and the intake side of the air compression unit 5, respectively. That is, the two ends of the intake air passage 617 are connected to the intake side of the air compressor 5 and the air inlet 601, respectively. A safety valve 618 is connected between the intake air passage 617 and the air outlet of the air compressor 5 through an air passage, and the safety valve 618 is disposed in the valve block 6.

[0090] The air intake passage 617 is equipped with a one-way air intake valve 619 to prevent the gas entering the air passage from flowing out in the reverse direction from the air intake port 601.

[0091] In this embodiment of the invention, a pressure sensor 610 is also included. The pressure sensor 610 is used to detect the gas pressure in the gas path and feed it back to the controller 9. Preferably, the pressure sensor 610 is integrated into the valve block 6.

[0092] The working principle of the gas circuit is as follows Figure 6 As shown:

[0093] 1. When inflating the air spring 20:

[0094] When air is supplied to the air spring 20 via the atmosphere: the corresponding solenoid valve 614 can be opened, the air passage 608 can be switched through solenoid valve 613, and the other solenoid valves can be closed. At this time, the outside air enters the air intake passage 617 of the valve block 6 through the air intake port 601, and after being compressed by the air compression unit 5, it enters the air dryer 2 for drying. The dried air can then enter the corresponding air spring 20 through the air passage 608 to adjust the vehicle height.

[0095] When supplying air to the air spring 20 through the air tank 10: Solenoid valve 611 and its corresponding solenoid valve 614 can be opened, and solenoid valve 613 can be used to switch the air passage 607 to the air path of the air spring 20, while the other solenoid valves are closed. At this time, the air stored in the air tank 10 can be supplied to the air spring 20 through air passage 605 and air passage 607.

[0096] II. When storing gas in the gas storage tank:

[0097] When storing air in the air tank 10 via the air spring 20: open solenoid valve 2 612 and the corresponding solenoid valve 4 614, switch the connection between the air spring 20 and the air inlet of the air compression unit 5 via solenoid valve 3 613, and close the remaining solenoid valves. The gas in the air spring 20 is compressed by the air compression unit 5 and then enters the air dryer 2 for drying. The dried air can then enter the air tank 10 through the open solenoid valve 2 612.

[0098] When storing air in the air tank 10 via the atmosphere: Solenoid valve 2 612 is opened, and solenoid valve 3 613 disconnects the air inlet of the air compression unit 5 from the air spring 20, while the remaining solenoid valves are closed. At this time, outside air enters the air inlet passage 617 of the valve block 6 through the air inlet 601, is compressed by the air compression unit 5, and then enters the air dryer 2 for drying. The dried air can then be stored in the air tank 10 through the opened solenoid valve 2 612.

[0099] III. During reverse-flushing drying in air dryer 2:

[0100] Open solenoid valve 5 616 and solenoid valve 2 612, and close the remaining solenoid valves. The air in the air tank 10 flows in the reverse direction through the air dryer 2 and is discharged by the opened solenoid valve 5 616. The moisture adsorbed by the desiccant in the air dryer 2 is dried by the high-pressure air discharged from the air tank 10, which can effectively regenerate the desiccant in the air dryer 2.

[0101] IV. When the air spring 20 is deflating at high speed:

[0102] Open solenoid valve 5 616, switch the air spring 20 and the air compressor unit 5 to be connected by solenoid valve 3 613, and close the other solenoid valves. The gas in the air spring 20 is compressed by the air compressor unit 5 and discharged into the atmosphere through the opened solenoid valve 5 616.

[0103] It should be noted that: Figure 6 This application only shows one air path connection relationship of the integrated air compressor 100. The air path connection method of the gas channel in the valve block 6 and the solenoid valve control method are merely exemplary and can be flexibly adjusted as needed.

[0104] The second aspect of this utility model also discloses an air suspension system, which includes any of the integrated air compressors described above, and has all the beneficial effects of an integrated air compressor, which will not be elaborated here.

[0105] In summary, the air compressor of this utility model distributes two sets of piston units on the same side of the crankshaft at one end of the drive motor, which shortens the axial length of the piston and optimizes the axial space of the air compressor. In addition, the two sets of pistons run in opposite directions, and their inertial forces cancel each other out, which improves the stability of the device operation, effectively reduces noise, and extends the service life of the machine.

[0106] In addition, by constructing piston chambers and exhaust chambers inside the cylinder block, not only can the working efficiency of the cylinder be improved and its stable operation be ensured, but the noise reduction cylinder head set at its top can also buffer the airflow and reduce noise; and the valve plates of the one-way intake valve group and the one-way exhaust valve group act on the buffer pad during operation, reducing the mechanical noise of the compressor valve plate knocking, thus reducing the overall noise generated during air compression.

[0107] Furthermore, the valve block, air dryer, and controller of this utility model are integrated into the air compression unit and drive motor on one side in a space-saving manner. Due to the close cooperation between the various mechanisms and the compact layout, the integration of the device is improved.

[0108] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An integrated air compressor, characterized in that: It includes a drive motor (3), an air compression unit (5), and a solenoid valve assembly; One end of the motor shaft (301) of the drive motor (3) is connected to the crankshaft (502) of the air compression unit (5) so that the air compression unit (5) can operate compressed air; The air compression unit (5) includes two piston units, each of which includes a cylinder, a piston (504) that reciprocates along the cylinder, and a connecting rod (512) connected at one end to the piston (504). The other end of the connecting rod (512) is rotatably mounted on the crankshaft (502), and the two pistons (504) have a phase angle difference of 180° to counteract inertial forces. The solenoid valve assembly is arranged in a valve block (6) connected to the air passage of the air compression unit (5). The valve block (6) has a gas passage for forming an air passage. The air compressed by the air compression unit (5) is distributed by the solenoid valve assembly through the gas passage.

2. An integrated air compressor according to claim 1, characterized in that: The valve block (6) is at least partially disposed on one side of the housing of the drive motor (3), and the valve block (6) is disposed adjacent to the air compression unit (5).

3. An integrated air compressor according to claim 1, characterized in that: The cylinder body (509) is configured to have a piston chamber (507) and an exhaust chamber (517) connected to each other through an exhaust port (515). The exhaust chamber (517) is connected to an exhaust unit, which is connected to a gas passage in the valve block (6). The piston chamber (507) is connected to an intake unit, and air is unidirectionally transported along the intake unit, piston chamber (507), exhaust chamber (517), and exhaust unit.

4. An integrated air compressor according to claim 3, characterized in that: It also includes a one-way exhaust valve assembly, which is disposed at the exhaust port (515). The one-way exhaust valve assembly is used to control the piston chamber (507) to exhaust from the exhaust chamber (517) in one direction. The piston chamber (507) and the exhaust chamber (517) are separated by a partition plate (513) disposed in the cylinder (509). The one-way exhaust valve assembly includes a valve plate two (516) mounted on the surface of the partition plate (513). The opening and closing part of the valve plate two (516) faces the exhaust port (515) on the partition plate (513). A buffer pad is provided on the opposite surface of the valve plate two (516) and the partition plate (513).

5. An integrated air compressor according to claim 3, characterized in that: It also includes a one-way intake valve assembly, which is disposed on one side of the intake port (510) opened on the piston (504). A crankcase (4) is disposed below the cylinder block (509). The intake port (510) connects the piston chamber (507) and the inner cavity of the crankcase (4). The one-way intake valve assembly is used to control the crankcase (4) to unidirectionally intake air into the piston chamber (507). The one-way intake valve assembly includes a valve plate (501) installed on the surface of the piston (504). The opening and closing part of the valve plate (501) is directly opposite to the intake port (510). A buffer pad is disposed on the opposite surface of the valve plate (501) and the piston (504).

6. An integrated air compressor according to claim 1, characterized in that: The cylinder is equipped with a noise-reducing cylinder head (514) on top.

7. An integrated air compressor according to claim 1, characterized in that: Also includes Air dryer (2), the air dryer (2) is connected to the valve block (6), the air compressed by the air compression unit (5) is connected to the inlet of the air dryer (2) through the gas channel, and the outlet of the air dryer (2) is connected to the solenoid valve group in the valve block (6) through the gas channel.

8. An integrated air compressor according to claim 1, characterized in that: Also includes The controller (9) is located on the same side of the solenoid valve group and the drive motor (3), and is electrically connected to both the solenoid valve group and the drive motor (3).

9. An integrated air compressor according to claim 7, characterized in that: The valve block (6) is also provided with an exhaust port (603), a first air pipe connector (602) connected to the air tank (10), and several second air pipe connectors (604) connected to the corresponding air springs (20). The gas passage includes: Air passage 1 (605) is connected at both ends to the air inlet end of air pipe connector 1 (602) and the air inlet side of air compression unit (5), respectively. Solenoid valve 1 (611) is provided on air passage 1 (605). Air passage two (606) is connected at both ends to the air inlet of the air pipe connector one (602) and the air outlet of the air dryer (2), respectively. Solenoid valve two (612) is provided on the air passage two (606). Air passage four (608) is connected at one end to the air outlet of the air dryer (2), and the other end of air passage four (608) is connected to the corresponding air pipe connector two (604) through several air passage five (609). Each air passage five (609) is equipped with a solenoid valve four (614), and air passage four (608) is equipped with a solenoid valve three (613). Air passage three (607) is connected at both ends to the air intake side of the air compression unit (5) and the solenoid valve three (613), the solenoid valve three (613) being a two-position three-way solenoid valve. An exhaust gas path (615) is provided, with one end connected to the exhaust port (603) and the other end connected to the gas path between the air compression unit (5) and the air dryer (2). A solenoid valve (616) is provided on the exhaust gas path (615). The intake air passage (617) is connected at both ends to the atmosphere and the intake side of the air compression unit (5).

10. An air suspension system, characterized in that: The integrated air compressor is described in any one of claims 1 to 9.

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