Double-cylinder serial air compressor

Abstract

The utility model provides a double-cylinder serial air compressor, and belongs to the field of compression equipment. The problem that an existing air compressor is short in service life is solved. The double-cylinder series air compressor comprises a high-pressure pump head, a low-pressure pump head and a driving source used for driving the high-pressure pump head and the low-pressure pump head to operate at the same time, and further comprises a radiator with a fan, and an air inlet of the high-pressure pump head and an air outlet of the low-pressure pump head are communicated with an air outlet and an air inlet of the radiator through pipe fittings respectively. The double-cylinder serial air compressor is long in service life.

Description

Technical Field

[0001] The utility model belongs to the field of air compression equipment and relates to an air compressor, in particular to a double-cylinder series air compressor. Background Art

[0002] The twin-cylinder tandem air compressor is a specific type of air compressor. Its main feature is that it adopts a twin-cylinder structure and achieves air compression by working in series with two cylinders.

[0003] The above-mentioned air compressor is a dual-cylinder series two-stage compression air compressor for automobiles disclosed in the China Patent Library (application number: 202020136253.2), which includes a low-pressure cylinder and a high-pressure cylinder arranged on the same crankshaft, the low-pressure cylinder and the high-pressure cylinder are arranged in series, the first piston of the low-pressure cylinder and the second piston of the high-pressure cylinder are linked to the crankshaft, the guide stroke area of ​​the first piston adopts a small cylinder diameter, thereby separating it from the compression stroke area, and the small cylinder diameter refers to a cylinder diameter that is smaller than the compression stroke area.

[0004] In the above-mentioned air compressor, the gas discharged from the low-pressure cylinder directly enters the high-pressure cylinder, causing the temperature inside the high-pressure cylinder to increase rapidly, affecting the life and working stability. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a double-cylinder series air compressor with long service life and stable operation.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a double-cylinder series air compressor, including a high-pressure pump head, a low-pressure pump head and a driving source for simultaneously driving the high-pressure pump head and the low-pressure pump head to operate, characterized in that the air compressor also includes a radiator with a built-in fan, and the air inlet of the high-pressure pump head and the exhaust port of the low-pressure pump head are respectively connected to the air outlet and air inlet of the radiator through pipes.

[0007] An air passage connecting the high-pressure pump head and the low-pressure pump head in series is formed between the exhaust port of the low-pressure pump head, the radiator and the air inlet of the high-pressure pump head. Under the premise of realizing secondary pressurization of the gas to enhance the air pressure, the radiator with its own fan is used to dissipate the heat of the gas discharged from the low-pressure pump head, so that the gas enters the high-pressure pump head at a lower temperature, thereby greatly reducing the temperature at the high-pressure pump head and improving the life and working stability of the air compressor.

[0008] In the above-mentioned two-cylinder series air compressor, the high-pressure pump head and the low-pressure pump head are arranged side by side, and the above-mentioned driving source is a dual-output motor horizontally arranged between the high-pressure pump head and the low-pressure pump head; the high-pressure pump head and the low-pressure pump head both include a cylinder, an air hood, and axial flow blades and a crank case arranged in the air hood, the two air hoods are respectively fixed at both ends of the dual-output motor, the two ends of the output shaft of the dual-output motor respectively extend into the two air hoods, the two ends of the output shaft pass through the corresponding crank case and are fixedly connected to the corresponding axial flow blades, the lower ends of the cylinder barrels of the two cylinders extend into the corresponding air hoods and are fixed on the corresponding crank case, the inner cavities of the cylinder barrels and the corresponding crank case are connected, and the output shaft drives the corresponding cylinder to operate through a connecting rod assembly arranged in the crank case.

[0009] The connecting rod assembly is arranged in the crankcase, so that in actual design, the high and low pressure pump head wind hood parts can be designed into a sealing structure to achieve waterproof and dustproof properties, so that the air compressor can be used under more demanding working conditions and has a wider range of uses.

[0010] In the above-mentioned two-cylinder series air compressor, in the high-pressure pump head, an air intake channel and an exhaust channel, both of which are strip-shaped, are provided between the wind hood and the crankcase. The inlet of the air intake channel and the outlet of the exhaust channel are both outside the wind hood, and the outlet of the air intake channel and the inlet of the exhaust channel are both connected to the inner cavity of the crankcase. An air duct connecting the outlet of the exhaust channel and the air inlet of the low-pressure pump head is provided on one side of the dual-output motor.

[0011] During use, external air is drawn into the high-pressure pump head crankcase through the air inlet channel, and discharged into the air duct through the exhaust channel, and finally enters the low-pressure pump head. In this way, in actual use, external air is first drawn into the high-pressure pump head crankcase to take away part of the temperature inside the crankcase, thereby further accelerating the heat dissipation of the high-pressure pump head and improving the life and working stability of the air compressor.

[0012] In the above-mentioned two-cylinder series air compressor, in the high-pressure pump head, both sides of the crankcase are horizontally penetrated with through holes, and two joints are fixed outside the wind cover, one end of the two joints extends into the wind cover and is respectively inserted into the two through holes, the inner holes of the two joints are respectively the above-mentioned intake channel and exhaust channel, and the other end of the joint whose inner hole is the exhaust channel is connected to the air guide pipe. The above-mentioned design is convenient for design and assembly.

[0013] In the above-mentioned two-cylinder series air compressor, the length of the air duct extends along the arrangement direction of the high-pressure pump head and the low-pressure pump head, and the outlet of the exhaust channel and the air inlet of the low-pressure pump head are both arranged flush with each other, which not only further facilitates assembly but also allows the gas to flow smoothly into the low-pressure pump head.

[0014] In the above-mentioned two-cylinder series air compressor, in the high-pressure pump head, a piston connected to the corresponding connecting rod assembly is provided in the cylinder barrel, a cylinder head is fixed above the cylinder barrel, a valve plate is horizontally provided between the cylinder barrel and the cylinder head, an air intake chamber is formed between the piston and the valve plate, a cavity is formed between the top surface of the valve plate and the inner wall of the cylinder head, a partition is vertically provided in the cavity, the partition divides the cavity into an air chamber one and an air chamber two that are not directly connected, an exhaust hole is provided on the valve plate to connect the air chamber two to the air intake chamber, and an exhaust valve sheet for controlling the opening and closing of the exhaust hole is provided on the top wall of the valve plate; the air inlet and exhaust port of the high-pressure pump head are both arranged on the cylinder head, and the air inlet and exhaust port of the high-pressure pump head are connected to the air chamber one and the air chamber two respectively, an air inlet hole for connecting the air chamber one and the air intake chamber is provided on the valve plate, and a guide structure for unidirectionally conducting the air chamber one and the air intake chamber is provided at the air inlet hole, and the conduction direction of the unidirectional structure is consistent with the direction in which the gas is discharged from the air chamber one into the air intake chamber.

[0015] When in use, the piston moves downward to allow the gas to enter the air inlet cavity through the air inlet of the high-pressure pump head, air chamber one and the air inlet hole; the piston moves upward to allow the gas to push open the exhaust valve plate and enter air chamber two, and finally be discharged through the exhaust port of the high-pressure pump head.

[0016] The air inlet and exhaust port of the high-pressure pump head are both arranged on the same cylinder head, which can effectively reduce the height of the high-pressure pump head and reduce the overall space occupied by the air compressor.

[0017] In the above-mentioned two-cylinder series air compressor, the partition and the cylinder head are an integrated structure, the upper side and both ends of the partition extend to the inner wall of the cavity, and a seal is formed between the lower side of the partition and the valve plate. The above-mentioned design has the advantages of simple structure and convenient assembly.

[0018] In the above-mentioned two-cylinder tandem air compressor, a strip groove is provided on the bottom surface of the partition along the length direction of the partition, and a sealing strip is provided in the strip groove. The bottom surface of the sealing strip is pressed tightly against the top surface of the valve plate, and both end surfaces of the sealing strip are pressed tightly against the inner wall of the cavity. Under the action of the sealing strip, the sealing effect formed between the partition and the valve plate is effectively strengthened, and the air chamber 1 and the air chamber 2 are stably separated, ensuring the stable operation of the air compressor.

[0019] In the above-mentioned two-cylinder series air compressor, the one-way structure includes an intake valve plate horizontally arranged below the valve plate, the intake valve plate is connected to the valve plate in an upward and downward sliding manner and is limited in the downward movement distance, and the intake valve plate can press on the bottom surface of the valve plate and cover the above-mentioned intake hole when it moves upward. When in use, when the piston moves downward, the intake valve plate moves downward to open the intake hole to achieve air intake; when the second piston moves upward, the intake valve plate moves upward to cover the exhaust hole, so that the gas completely enters the second air chamber through the exhaust hole, which has the advantages of simple structure and stable operation.

[0020] In the above-mentioned two-cylinder series air compressor, a screw is vertically fixed on the second valve plate, and a through hole for the screw rod to pass through is provided on the intake valve plate, and the aperture of the through hole is smaller than the outer diameter of the screw head.

[0021] As another solution, in the above-mentioned two-cylinder series air compressor, the one-way structure is a one-way valve arranged in air chamber one, and the two ends of the one-way valve are respectively connected to the air inlet and the air inlet hole of the high-pressure pump head.

[0022] In the above-mentioned two-cylinder series air compressor, the radiator and the air duct are arranged on both sides of the width of the dual-output motor, making the overall layout more reasonable and compact.

[0023] Compared with the existing technology, this double-cylinder series air compressor has the following advantages:

[0024] 1. The exhaust port of the low-pressure pump head, the radiator and the air inlet of the high-pressure pump head form an air passage that connects the high-pressure pump head and the low-pressure pump head in series. Under the premise of realizing secondary gas pressurization to enhance the air pressure, the radiator with its own fan is used to dissipate the heat of the gas discharged from the low-pressure pump head, so that the gas enters the high-pressure pump head at a lower temperature, thereby greatly reducing the temperature at the high-pressure pump head and improving the life and working stability of the air compressor.

[0025] 2. When in use, external air is drawn into the high-pressure pump head crankcase through the air inlet channel, and discharged into the air duct through the exhaust channel, and finally enters the low-pressure pump head. In this way, in actual use, external air is first drawn into the high-pressure pump head crankcase to take away part of the temperature in the crankcase, thereby further accelerating the heat dissipation of the high-pressure pump head and improving the life and working stability of the air compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of a twin-cylinder series air compressor.

[0027] Figure 2 It is a three-dimensional schematic diagram of a twin-cylinder series air compressor in another direction.

[0028] Figure 3 It is an axial cross-sectional diagram of a twin-cylinder series air compressor.

[0029] Figure 4 It is a radial cross-sectional diagram of a twin-cylinder series air compressor.

[0030] Figure 5 yes Figure 4 A magnified schematic diagram of center A.

[0031] In the figure, 1, radiator; 1a, fan; 2, dual-output motor; 2a, output shaft; 3, wind cover; 4, axial flow blade; 5, connecting rod assembly; 6, pipe fittings; 7, cylinder barrel; 8, cylinder head; 8a, partition; 8b, air chamber one; 8c, air chamber two; 9, piston; 10, valve plate; 10a, exhaust hole; 10b, air inlet hole; 11, air inlet cavity; 12, air inlet of high-pressure pump head; 13, exhaust port of low-pressure pump head; 14, sealing strip; 15, air inlet valve plate; 16, screws; 17, crankcase; 18, air inlet channel; 19, exhaust channel; 20, air guide pipe; 21, joint; 22, base. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Embodiment 1

[0033] like Figure 1 As shown, the double-cylinder series air compressor includes a radiator 1, a high-pressure pump head, a low-pressure pump head, and a power component for simultaneously driving the high-pressure pump head and the low-pressure pump head to operate.

[0034] in,

[0035] The operating states of the high-pressure pump head and the low-pressure pump head are opposite, that is, when the high-pressure pump head is inletting air, the low-pressure pump head is exhausting air, and vice versa, when the high-pressure pump head is exhausting air, the low-pressure pump head is inletting air.

[0036] like Figure 1 As shown, the radiator 1 is arranged outside the high-pressure pump head and the low-pressure pump head. The radiator 1 has a built-in fan 1a and can be purchased on the market. The air inlet 12 of the high-pressure pump head and the air outlet 13 of the low-pressure pump head are respectively connected to the air outlet and the air inlet of the radiator 1 through the pipe 6.

[0037] An air passage connecting the high-pressure pump head and the low-pressure pump head in series is formed among the exhaust port 13 of the low-pressure pump head, the radiator 1 and the air inlet 12 of the high-pressure pump head. Under the premise of realizing secondary pressurization of the gas to enhance the air pressure, the radiator 1 with its own fan 1a is used to dissipate the heat of the gas discharged from the low-pressure pump head, so that the gas enters the high-pressure pump head at a lower temperature, thereby greatly reducing the temperature at the high-pressure pump head and improving the life and working stability of the air compressor.

[0038] Specifically,

[0039] like Figure 1 and Figure 3As shown, the high-pressure pump head and the low-pressure pump head are arranged side by side, and the driving source is a dual-output motor 2 horizontally arranged between the high-pressure pump head and the low-pressure pump head, and the axis of the dual-output motor 2 extends along the arrangement direction of the high-pressure pump head and the low-pressure pump head. The high-pressure pump head and the low-pressure pump head both include a cylinder, a wind cover 3, and an axial flow blade 4 and a crankcase 17 arranged in the wind cover 3. Among them, the two wind covers 3 are respectively fixed at both ends of the dual-output motor 2, and the two ends of the output shaft 2a of the dual-output motor 2 extend into the two wind covers 3 respectively, and the two ends of the output shaft 2a pass through the corresponding crankcase 17 and are fixedly connected to the corresponding axial flow blade 4, and the lower ends of the cylinder barrels 7 of the two cylinders extend into the corresponding wind cover 3 and are fixed on the corresponding crankcase 17, and the inner cavities of the cylinder barrel 7 and the corresponding crankcase 17 are connected, and the output shaft 2a drives the corresponding cylinder to operate through the connecting rod assembly 5 arranged in the crankcase 17.

[0040] The connecting rod assembly 5 is arranged in the crankcase 17, so that in actual design, the high and low pressure pump head wind hoods 3 can be designed as a sealing structure to achieve waterproof and dustproof properties, so that the air compressor can be used under more demanding working conditions and has a wider range of uses.

[0041] in,

[0042] The specific structures and installation methods of the connecting rod assembly 5 and the low-pressure pump head are existing and will not be described in detail here.

[0043] like Figure 3 , Figure 4 and Figure 5 As shown, the specific structure of the high-pressure pump head cylinder is as follows: a piston 9 connected to the corresponding connecting rod assembly 5 is arranged in the cylinder barrel 7, so that the dual-output motor 2 drives the piston 9 to rise and fall. A cylinder head 8 is fixed above the cylinder barrel 7, a valve plate 10 is arranged horizontally between the cylinder barrel 7 and the cylinder head 8, an air intake chamber 11 is formed between the piston 9 and the valve plate 10, a cavity is formed between the top surface of the valve plate 10 and the inner wall of the cylinder head 8, a partition 8a is arranged vertically in the cavity, and the partition 8a divides the cavity into an air chamber 1 8b and an air chamber 2 8c that are not directly connected, an exhaust hole 10a is arranged on the valve plate 10 to connect the air chamber 2 8c to the air intake chamber 11, and a valve plate 10 is arranged on the top wall for controlling the exhaust hole 10a. The exhaust valve plate that opens and closes; the air inlet 12 and the exhaust port of the high-pressure pump head are both arranged on the cylinder head 8, and the air inlet 12 and the exhaust port of the high-pressure pump head are connected to the air chamber 1 8b and the air chamber 2 8c respectively. The valve plate 10 is provided with an air inlet hole 10b for connecting the air chamber 1 8b and the air inlet cavity 11. The air inlet hole 10b is provided with a guide structure that allows the air chamber 1 8b and the air inlet cavity 11 to be unidirectionally conducted, and the conducting direction of the unidirectional structure is consistent with the direction in which the gas is discharged from the air chamber 1 8b into the air inlet cavity 11. When in use, the piston 9 moves downward to allow the gas to enter the air inlet cavity 11 through the air inlet of the high-pressure pump head, the air chamber 1 8b and the air inlet hole 10b; the piston 9 moves upward to allow the gas to push open the exhaust valve plate and enter the air chamber 2 8c, and finally be discharged through the exhaust port of the high-pressure pump head.

[0044] The air inlet 12 and the air outlet of the high-pressure pump head are both arranged on the same cylinder head 8, which can effectively reduce the height of the high-pressure pump head and reduce the overall space occupied by the air compressor.

[0045] in,

[0046] The installation method of the exhaust valve sheet and the valve plate 10 is existing and will not be described in detail here.

[0047] The partition 8a and the cylinder head 8 are an integrated structure, the upper side and both ends of the partition 8a extend to the inner wall of the cavity, and a seal is formed between the lower side of the partition 8a and the valve plate 10. Preferably, a strip groove is provided through the bottom surface of the partition 8a along the length direction of the partition 8a, and a sealing strip 14 is provided in the strip groove. The bottom surface of the sealing strip 14 is pressed tightly against the top surface of the valve plate 10, and both end surfaces of the sealing strip 14 are pressed tightly against the inner wall of the cavity. Under the action of the sealing strip 14, the sealing effect formed between the partition 8a and the valve plate 10 is effectively strengthened, and the air chamber 1 8b and the air chamber 2 8c are stably separated, ensuring the stable operation of the air compressor.

[0048] The one-way structure is as follows: it includes an intake valve plate 15 horizontally arranged below the valve plate 10, the intake valve plate 15 is connected to the valve plate 10 by sliding up and down and is limited in the downward movement distance, and the intake valve plate 15 can press on the bottom surface of the valve plate 10 and cover the intake hole 10b when it moves up. When in use, when the piston 9 moves down, the intake valve plate 15 moves down to open the intake hole 10b to achieve air intake; when the piston 9 moves up, the intake valve plate 15 moves up to cover the intake hole 10b, so that the gas completely enters the air chamber 2 8c through the exhaust hole 10a, which has the advantages of simple structure and stable operation. Among them, the installation method of the intake valve plate 15 is as follows: a screw 16 is vertically fixed on the valve plate 10, and a through hole is provided on the intake valve plate 15 for the rod of the screw 16 to pass through, and the diameter of the through hole is smaller than the outer diameter of the head of the screw 16.

[0049] Further explanation, such as Figure 2 and Figure 4 As shown, in the high-pressure pump head, an air intake channel 18 and an exhaust channel 19, both of which are strip-shaped, are provided between the wind cover 3 and the crankcase 17. The inlet of the air intake channel 18 and the outlet of the exhaust channel 19 are both outside the wind cover 3, and the outlet of the air intake channel 18 and the inlet of the exhaust channel 19 are both connected to the inner cavity of the crankcase 17. An air duct 20 is provided on one side of the dual-output motor 2 to connect the outlet of the exhaust channel 19 and the air intake of the low-pressure pump head. When in use, external gas is drawn into the high-pressure pump head crankcase 17 through the air intake channel 18, and is discharged into the air duct 20 through the exhaust channel 19, and finally enters the low-pressure pump head. In this way, when in actual use, external gas is first drawn into the high-pressure pump head crankcase 17 to take away part of the temperature in the crankcase 17, thereby further accelerating the heat dissipation of the high-pressure pump head and improving the life and working stability of the air compressor. Preferably, the radiator 1 and the air duct 20 are arranged on both sides of the width of the dual-output motor 2, so that the overall layout is more reasonable and compact.

[0050] In this embodiment, the structures of the air intake channel 18 and the exhaust channel 19 are as follows: in the high-pressure pump head, both sides of the crankcase 17 are horizontally penetrated with through holes, and two joints 21 are fixed outside the wind cover 3, one end of the two joints 21 extends into the wind cover 3 and is respectively inserted into the two through holes, the inner holes of the two joints 21 are the above-mentioned air intake channel 18 and exhaust channel 19, and the other end of the joint 21 with the inner hole of the exhaust channel 19 is connected to the air guide pipe 20. The above design is adopted for easy design and assembly.

[0051] Preferably, the length of the air guide tube 20 extends along the arrangement direction of the high-pressure pump head and the low-pressure pump head, and the outlet of the exhaust channel 19 and the air inlet of the low-pressure pump head are both arranged flush with each other, which not only further facilitates assembly but also allows the gas to flow smoothly into the low-pressure pump head.

[0052] In the actual product, the air compressor also includes a base 22 , and the high-pressure pump head, the low-pressure pump head, the dual-output motor 2 and the radiator 1 are all fixed above the base 22 . Embodiment 2

[0053] The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that the one-way structure is a one-way valve arranged in the air chamber 8b, and the two ends of the one-way valve are respectively connected to the air inlet of the high-pressure pump head and the air inlet hole 10b.

[0054] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A two-cylinder series air compressor, comprising a high-pressure pump head, a low-pressure pump head and a driving source for driving the high-pressure pump head and the low-pressure pump head to operate simultaneously, characterized in that: The air compressor also includes a radiator (1) with a built-in fan (1a), and the air inlet (12) of the high-pressure pump head and the air outlet (13) of the low-pressure pump head are respectively connected to the air outlet and air inlet of the radiator (1) through pipe fittings (6).

2. The double-cylinder tandem air compressor according to claim 1, characterized in that: The high-pressure pump head and the low-pressure pump head are arranged side by side, and the driving source is a dual-output motor (2) arranged horizontally between the high-pressure pump head and the low-pressure pump head; the high-pressure pump head and the low-pressure pump head both comprise a cylinder, a wind cover (3), and an axial flow blade (4) and a crankcase (17) arranged in the wind cover (3); the two wind covers (3) are respectively fixed to the two ends of the dual-output motor (2); the two ends of the output shaft (2a) of the dual-output motor (2) extend into the two wind covers (3) respectively; the two ends of the output shaft (2a) pass through the corresponding crankcase (17) and are fixedly connected to the corresponding axial flow blade (4); the lower ends of the cylinder barrels (7) of the two cylinders extend into the corresponding wind cover (3) and are fixed to the corresponding crankcase (17); the inner cavities of the cylinder barrels (7) and the corresponding crankcase (17) are connected; and the output shaft (2a) drives the corresponding cylinder to operate through a connecting rod assembly (5) arranged in the crankcase (17).

3. The double-cylinder tandem air compressor according to claim 2 is characterized in that: In the high-pressure pump head, an air intake passage (18) and an air exhaust passage (19) both in the form of strips are provided between the wind cover (3) and the crankcase (17); the inlet of the air intake passage (18) and the outlet of the air exhaust passage (19) are both located outside the wind cover (3); the outlet of the air intake passage (18) and the inlet of the air exhaust passage (19) are both connected to the inner cavity of the crankcase (17); and an air guide pipe (20) is provided on one side of the dual-output motor (2) to connect the outlet of the air exhaust passage (19) and the air intake of the low-pressure pump head.

4. The double-cylinder tandem air compressor according to claim 3 is characterized in that: In the high-pressure pump head, through holes are horizontally penetrated on both sides of the crankcase (17), and two joints (21) are fixed outside the wind cover (3). One end of the two joints (21) extends into the wind cover (3) and is respectively inserted into the two through holes. The inner holes of the two joints (21) are the above-mentioned intake channel (18) and exhaust channel (19), and the other end of the joint (21) whose inner hole is the exhaust channel (19) is connected to the air guide pipe (20).

5. The double-cylinder tandem air compressor according to claim 4, characterized in that: The length of the air guide pipe (20) extends along the arrangement direction of the high-pressure pump head and the low-pressure pump head, and the outlet of the exhaust channel (19) and the air inlet of the low-pressure pump head are both arranged in flush positions.

6. The double-cylinder tandem air compressor according to claim 2, characterized in that: In a high-pressure pump head, a piston (9) connected to a corresponding connecting rod assembly (5) is arranged in a cylinder barrel (7), a cylinder head (8) is fixed above the cylinder barrel (7), a valve plate (10) is arranged horizontally between the cylinder barrel (7) and the cylinder head (8), an air intake chamber (11) is formed between the piston (9) and the valve plate (10), a cavity is formed between the top surface of the valve plate (10) and the inner wall of the cylinder head (8), a partition (8a) is arranged vertically in the cavity, the partition (8a) partitions the cavity into an air chamber 1 (8b) and an air chamber 2 (8c) which are not directly connected, an exhaust hole (10a) is arranged on the valve plate (10) to connect the air chamber 2 (8c) to the air intake chamber (11), and the valve An exhaust valve plate for controlling the opening and closing of the exhaust hole (10a) is provided on the top wall of the plate (10); the air inlet (12) and the exhaust port of the high-pressure pump head are both arranged on the cylinder head (8), and the air inlet (12) and the exhaust port of the high-pressure pump head are respectively connected to the air chamber one (8b) and the air chamber two (8c); the valve plate (10) is provided with an air inlet (10b) for connecting the air chamber one (8b) and the air inlet cavity (11); a guide structure for unidirectionally conducting the air chamber one (8b) and the air inlet cavity (11) is provided at the air inlet (10b), and the conducting direction of the unidirectional structure is consistent with the direction in which the gas is discharged from the air chamber one (8b) into the air inlet cavity (11).

7. The double-cylinder tandem air compressor according to claim 6, characterized in that: The partition plate (8a) and the cylinder head (8) are an integrated structure; the upper side and both ends of the partition plate (8a) extend to the inner wall of the cavity; and a seal is formed between the lower side of the partition plate (8a) and the valve plate (10).

8. The double-cylinder tandem air compressor according to claim 6, characterized in that: The one-way structure comprises an intake valve plate (15) arranged horizontally below the valve plate (10); the intake valve plate (15) is connected to the valve plate (10) in an upward sliding manner and has a limited downward movement distance; when the intake valve plate (15) moves upward, it can press on the bottom surface of the valve plate (10) and cover the intake hole (10b).

9. The double-cylinder tandem air compressor according to claim 8, characterized in that: A screw (16) is vertically fixed on the second valve plate (10), and a through hole is provided on the air intake valve plate (15) for the rod of the screw (16) to pass through, and the diameter of the through hole is smaller than the outer diameter of the head of the screw (16).

10. The double-cylinder tandem air compressor according to claim 3, characterized in that: The radiator (1) and the air guide pipe (20) are respectively arranged on both sides of the width of the dual-output motor (2).

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