Novel two-stage compression air compressor

Abstract

The utility model provides a novel two-stage compression air compressor. The novel two-stage compression air compressor solves the problem that an existing air compressor is short in service life. The novel two-stage compression air compressor comprises a high-pressure pump head and a low-pressure pump head, a double-output motor is arranged between the high-pressure pump head and the low-pressure pump head, the high-pressure pump head and the low-pressure pump head each comprise a fan cover, axial flow blades are arranged in the two fan covers, and the two ends of an output shaft of the double-output motor extend into the two fan covers respectively and are fixedly connected with the two axial flow blades respectively. A finned tube radiator is arranged on one side of the double-output motor, 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 finned tube radiator through pipe fittings respectively. A long-strip-shaped air guide channel is formed between the finned tube radiator and the outer wall of a shell of the double-output motor, the length of the air guide channel extends in the axial direction of the double-output motor, the two ends of the air guide channel are communicated with inner cavities of the two fan covers respectively, and air guided into the air guide channel from the fan covers is blown out in the direction of finned tubes of the finned tube radiator. The two-stage compression 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 novel two-stage compression air compressor. Background Art

[0002] The two-stage compression air compressor is a specific type of air compressor. Its main feature is that it adopts a double-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 new type of two-stage compression 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 new type of two-stage compression air compressor, including a high-pressure pump head and a low-pressure pump head arranged side by side, a dual-output motor is 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 wind cover, and the two wind covers are respectively fixed at both ends of the dual-output motor, axial flow blades are arranged in the two wind covers, the two ends of the output shaft of the dual-output motor respectively extend into the two wind covers and are respectively fixed to the two axial flow blades, characterized in that a finned tube radiator is arranged on one side of the dual-output motor, 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 the air inlet of the finned tube radiator through pipe fittings; a long strip-shaped air guide channel is formed between the finned tube radiator and the outer wall of the dual-output motor casing, the length of the air guide channel extends along the axial direction of the dual-output motor, the two ends of the air guide channel are respectively connected to the inner cavities of the two wind covers, and the wind introduced into the air guide channel from the wind cover is blown out toward the fin tube direction of the finned tube radiator.

[0007] When in use, the gas discharged from the exhaust port of the low-pressure pump head enters the high-pressure pump head through the fin tube radiator for secondary pressurization; the operation of the dual-output motor drives the axial flow blades to rotate, so that the wind in the wind cover flows into the air guide channel, and then blows to the fin tubes of the fin tube radiator and is discharged to take away the heat on the fin tubes.

[0008] 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 fin-tube radiator and the air inlet of the high-pressure pump head. On the premise of realizing secondary pressurization of the gas to enhance the air pressure, an air guide passage is provided between the fin-tube radiator and the dual-output motor to connect the two wind hoods at both ends respectively, and the wind introduced into the air guide passage from the wind hood is blown toward the fin tubes of the fin-tube radiator, so that the fin-tube radiator obtains better heat dissipation performance to greatly reduce the temperature 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.

[0009] In the above-mentioned new type of two-stage compression air compressor, the above-mentioned high-pressure pump head also includes a cylinder barrel vertically fixed on the corresponding wind hood and a cylinder head fixed on the cylinder barrel, a piston is arranged in the cylinder barrel, a valve plate is horizontally arranged 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 arranged in the cavity, the partition divides the cavity into an air chamber 1 and an air chamber 2 that are not directly connected, an exhaust hole is arranged on the valve plate to connect the air chamber 2 to the air intake chamber, and an exhaust valve sheet for controlling the opening and closing of the exhaust hole is arranged 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 1 and the air chamber 2 respectively, an air inlet hole for connecting the air chamber 1 and the air intake chamber is arranged on the valve plate, and a guide structure for making the air chamber 1 and the air intake chamber unidirectionally conductive 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 1 into the air intake chamber.

[0010] 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.

[0011] 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.

[0012] In the above-mentioned novel two-stage compression air compressor, the partition plate and the cylinder head are an integrated structure, the upper side and both ends of the partition plate extend to the inner wall of the cavity, and a seal is formed between the lower side of the partition plate and the valve plate. The above-mentioned design has the advantages of simple structure and convenient assembly.

[0013] In the above-mentioned novel two-stage compression 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.

[0014] In the above-mentioned novel two-stage compression 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.

[0015] In the above-mentioned novel two-stage compression 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.

[0016] As another solution, in the above-mentioned novel two-stage compression air compressor, the one-way structure is a one-way valve arranged in the air chamber, 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.

[0017] In the above-mentioned novel two-stage compression air compressor, the high-pressure pump head and the low-pressure pump head also include a crank assembly arranged in the wind cover and connected to the output shaft, and a crank case for accommodating the corresponding crank assembly is also arranged in the wind cover, and the two ends of the above-mentioned output shaft pass through the two crank cases respectively and are respectively fixed to the two above-mentioned axial flow fan blades, and the lower end of the cylinder barrel extends into the corresponding wind cover and is fixed on the corresponding crank case, and the inner cavities of the cylinder barrel and the crank case are connected. The crank assembly is arranged in the crank case, so that in actual design, the high and low pressure pump heads can be designed as a sealing structure except the wind cover to achieve waterproof and dustproof, so that the air compressor can be used under more demanding working conditions and has a wider range of uses.

[0018] In the above-mentioned new type of two-stage compression 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 the other side of the dual-output motor.

[0019] 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.

[0020] In the above-mentioned novel two-stage compression 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.

[0021] In the above-mentioned new type of two-stage compression 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.

[0022] Compared with the existing technology, this new two-stage compression air compressor has the following advantages:

[0023] 1. An air passage connecting the high-pressure pump head and the low-pressure pump head in series is formed between the low-pressure pump head exhaust port, the fin tube radiator and the high-pressure pump head air inlet. On the premise of realizing secondary gas pressurization to enhance the air pressure, an air guide passage is provided between the fin tube radiator and the dual-output motor to connect the two wind hoods at both ends. The wind introduced into the air guide passage from the wind hood is blown toward the fin tube of the fin tube radiator, so that the fin tube radiator obtains better heat dissipation performance to greatly reduce the temperature 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.

[0024] 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

[0025] Figure 1 It is a three-dimensional schematic diagram of a new type of two-stage compression air compressor.

[0026] Figure 2 It is a three-dimensional schematic diagram of the new two-stage compression air compressor in another direction.

[0027] Figure 3 It is an axial cross-sectional view of a new type of two-stage compression air compressor.

[0028] Figure 4 This is a schematic diagram of the location of the gas channel.

[0029] Figure 5 It is a radial schematic diagram of a new two-stage compression air compressor.

[0030] Figure 6 yes Figure 5 A magnified schematic diagram of center A.

[0031] In the figure, 1. fin tube radiator; 2. dual output motor; 2a. output shaft; 3. fan cover; 4. axial flow blade; 5. crank assembly; 6. pipe fittings; 7. air guide channel; 8. cylinder barrel; 9. cylinder head; 9a. partition; 9b. air chamber one; 9c. air chamber two; 10. piston; 11. valve plate; 11a. exhaust hole; 11b. air inlet hole; 12. air inlet cavity; 13. air inlet of high-pressure pump head; 14. exhaust port of low-pressure pump head; 15. sealing strip; 16. air inlet valve plate; 17. screws; 18. crankcase; 19. air inlet channel; 20. exhaust channel; 21. air guide pipe; 22. joint; 23. 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 and Figure 2 As shown, the novel two-stage compression air compressor includes a high-pressure pump head and a low-pressure pump head arranged side by side, and a dual-output motor 2 is 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. In actual products, the operation states of the high-pressure pump head and the low-pressure pump head are opposite, that is, when the high-pressure pump head is inlet, the low-pressure pump head is exhausted, and vice versa, when the high-pressure pump head is exhausted, the low-pressure pump head is inlet.

[0034] Specifically,

[0035] The high-pressure pump head and the low-pressure pump head both include an air hood 3 and an axial-flow fan blade 4 and a crank assembly 5 both arranged in the air hood 3. The high-pressure pump head also includes a high-pressure cylinder assembly arranged on the corresponding air hood 3, and the low-pressure pump head also includes a low-pressure cylinder assembly vertically arranged on the corresponding air hood 3. The two ends of the output shaft 2a of the dual-output motor 2 extend into the two air hoods 3 and are respectively fixed to the two axial-flow blades 4, and the two ends of the output shaft 2a drive the high-pressure cylinder assembly and the low-pressure cylinder assembly to operate respectively through the corresponding crank assembly 5.

[0036] Among them, the structures and installation methods of the crank assembly 5 and the low-pressure cylinder assembly are all existing and will not be described in detail here.

[0037] like Figure 1 and Figure 4As shown, a fin tube radiator 1 is provided on one side of the dual output motor 2. Preferably, the fin tube radiator 1 is provided on the width side of the dual output motor 2, and the structure of the fin tube radiator 1 is basically similar to the products on the market. The air inlet 13 of the high pressure pump head and the air outlet 14 of the low pressure pump head are respectively connected to the air outlet and the air inlet of the fin tube radiator 1 through the pipe 6. A long strip-shaped air guide channel 7 is formed between the fin tube radiator 1 and the outer wall of the housing of the dual output motor 2. The length of the air guide channel 7 extends along the axial direction of the dual output motor 2. The two ends of the air guide channel 7 are respectively connected to the inner cavities of the two wind hoods 3, and the wind introduced into the air guide channel 7 from the wind hood 3 is blown out toward the fin tubes of the fin tube radiator 1.

[0038] When in use, the gas discharged from the exhaust port of the low-pressure pump head enters the high-pressure pump head through the fin tube radiator 1 for secondary pressurization; the operation of the dual-output motor 2 drives the axial flow blades 4 to rotate, so that the wind in the wind cover 3 flows to the air guide channel 7, and then blows to the fin tubes of the fin tube radiator 1 and is discharged to take away the heat on the fin tubes.

[0039] An air passage connecting the high-pressure pump head and the low-pressure pump head in series is formed between the low-pressure pump head exhaust port, the fin-tube radiator 1 and the high-pressure pump head air inlet. On the premise of realizing secondary pressurization of the gas to enhance the air pressure, an air guide passage connecting the two wind hoods 3 at both ends is provided between the fin-tube radiator 1 and the dual-output motor 2, and the wind introduced into the air guide passage 7 from the wind hood 3 is blown toward the fin tubes of the fin-tube radiator 1, so that the fin-tube radiator 1 obtains better heat dissipation performance to greatly reduce the temperature 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.

[0040] In this embodiment,

[0041] like Figure 3 , Figure 5 and Figure 6As shown, the high-pressure cylinder assembly includes a cylinder barrel 8 vertically fixed on the corresponding wind cover 3 and a cylinder head 9 fixed on the cylinder barrel 8. Among them, a piston 10 is arranged in the cylinder barrel 8, and the piston 10 is connected to the corresponding crank assembly 5 to achieve lifting and lowering; a valve plate 11 is horizontally arranged between the cylinder barrel 8 and the cylinder head 9, and an air intake chamber 12 is formed between the piston 10 and the valve plate 11, and a cavity is formed between the top surface of the valve plate 11 and the inner wall of the cylinder head 9, and a partition plate 9a is vertically arranged in the cavity, and the partition plate 9a divides the cavity into an air chamber 1 9b and an air chamber 2 9c that are not directly connected, and an exhaust hole 11a is arranged on the valve plate 11 to connect the air chamber 2 9c to the air intake chamber 12, and an exhaust valve sheet for controlling the opening and closing of the exhaust hole 11a is arranged on the top wall of the valve plate 11. The air inlet 13 and the exhaust port of the high-pressure pump head are both arranged on the cylinder head 9, and the air inlet 13 and the exhaust port of the high-pressure pump head are respectively connected to the air chamber 1 9b and the air chamber 2 9c. The valve plate 11 is provided with an air inlet hole 11b for connecting the air chamber 1 9b and the air inlet cavity 12. The air inlet hole 11b is provided with a guide structure for making the air chamber 1 9b and the air inlet cavity 12 unidirectionally conductive, and the conduction direction of the unidirectional structure is consistent with the direction in which the gas is discharged from the air chamber 1 9b into the air inlet cavity 12.

[0042] When in use, the piston 10 moves downward to allow the gas to enter the air inlet chamber 12 through the high-pressure pump head air inlet, air chamber 1 9b and air inlet hole 11b; the piston 10 moves upward to allow the gas to push open the exhaust valve plate and enter air chamber 2 9c, and finally be discharged through the high-pressure pump head exhaust port.

[0043] The air inlet 13 and the air outlet of the high-pressure pump head are both arranged on the same cylinder head 9, which can effectively reduce the height of the high-pressure pump head and reduce the overall space occupied by the air compressor.

[0044] in,

[0045] The installation method of the exhaust valve sheet and the valve plate 11 is existing and will not be described in detail here.

[0046] The partition 9a and the cylinder head 9 are an integrated structure, the upper side and both ends of the partition 9a extend to the inner wall of the cavity, and a seal is formed between the lower side of the partition 9a and the valve plate 11. Preferably, a strip groove is provided through the bottom surface of the partition 9a along the length direction of the partition 9a, and a sealing strip 15 is provided in the strip groove. The bottom surface of the sealing strip 15 is pressed tightly against the top surface of the valve plate 11, and both end surfaces of the sealing strip 15 are pressed tightly against the inner wall of the cavity. Under the action of the sealing strip 15, the sealing effect formed between the partition 9a and the valve plate 11 is effectively strengthened, and the air chamber 1 9b and the air chamber 2 9c are stably separated, ensuring the stable operation of the air compressor.

[0047] like Figure 5 and Figure 6As shown, the one-way structure is as follows: it includes an intake valve plate 16 horizontally arranged below the valve plate 11, the intake valve plate 16 is connected to the valve plate 11 by sliding up and down and is limited in the downward movement distance, and the intake valve plate 16 can press on the bottom surface of the valve plate 11 and cover the intake hole 11b when it moves up. When in use, when the piston 10 moves down, the intake valve plate 16 moves down to open the intake hole 11b to achieve air intake; when the piston 10 moves up, the intake valve plate 16 moves up to cover the intake hole 11b, so that the gas completely enters the air chamber 2 9c through the exhaust hole 11a, which has the advantages of simple structure and stable operation. Among them, the installation method of the intake valve plate 16 is as follows: a screw 17 is vertically fixed on the valve plate 11, and a through hole is provided on the intake valve plate 16 for the rod of the screw 17 to pass through, and the diameter of the through hole is smaller than the outer diameter of the head of the screw 17.

[0048] like Figure 3 and Figure 5 As shown, crankcases 18 are also provided in the two wind shields 3, and the two crank assemblies 5 are respectively accommodated in the two crankcases 18. At this time, the two ends of the output shaft 2a pass through the two crankcases 18 and are respectively fixed to the two axial flow fan blades 4; the lower ends of the cylinder barrels 8 of the high-pressure pump head and the low-pressure pump head are both extended into the corresponding wind shields 3 and fixed on the corresponding crankcases 18, and the inner cavities of the cylinder barrels 8 and the corresponding crankcases 18 are connected. The crank assembly 5 is arranged in the crankcase 18, so that in actual design, the high-pressure and low-pressure pump head wind shields 3 can be designed as a sealing structure to achieve waterproof and dustproof, so that the air compressor can be used under more demanding working conditions and has a wider range of uses.

[0049] Further explanation, such as Figure 2 and Figure 5 As shown, in the high-pressure pump head, an air intake channel 19 and an air exhaust channel 20, both of which are strip-shaped, are provided between the wind cover 3 and the crankcase 18. The inlet of the air intake channel 19 and the outlet of the air exhaust channel 20 are both outside the wind cover 3, and the outlet of the air intake channel 19 and the inlet of the air exhaust channel 20 are both connected to the inner cavity of the crankcase 18. An air guide 21 is provided on the other side of the dual-output motor 2 to connect the outlet of the exhaust channel 20 and the air intake of the low-pressure pump head, and the finned tube radiator 1 and the air guide 21 are distributed along the width direction of the dual-output motor 2. When in use, external air is drawn into the high-pressure pump head crankcase 18 through the air intake channel 19, and is discharged into the air guide 21 through the exhaust channel 20, 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 18 to take away part of the temperature in the crankcase 18, thereby further accelerating the heat dissipation of the high-pressure pump head and improving the life and working stability of the air compressor.

[0050] In this embodiment, the structures of the air intake channel 19 and the exhaust channel 20 are as follows: in the high-pressure pump head, both sides of the crankcase 18 are horizontally penetrated with through holes, and two joints 22 are fixed outside the wind cover 3, one end of the two joints 22 extends into the wind cover 3 and is respectively inserted into the two through holes, the inner holes of the two joints 22 are the above-mentioned air intake channel 19 and exhaust channel 20, and the other end of the joint 22 with the inner hole of the exhaust channel 20 is connected to the air guide pipe 21. The above design is convenient for design and assembly.

[0051] Preferably, the length of the air guide tube 21 extends along the arrangement direction of the high-pressure pump head and the low-pressure pump head, and the outlet of the exhaust channel 20 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 23, and the high-pressure pump head, the low-pressure pump head, the dual-output motor 2 and the fin tube radiator 1 are all fixed above the base 23. At this time, the fin tube radiator 1, the dual-output motor 2 and the base 23 constitute the above-mentioned air guide channel 7 to facilitate assembly. 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 9b, 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 11b.

[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 novel two-stage compression air compressor, comprising a high-pressure pump head and a low-pressure pump head arranged side by side, a dual-output motor (2) being 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 comprising a wind shield (3), and the two wind shields (3) are respectively fixed at both ends of the dual-output motor (2), axial flow blades (4) are arranged in the two wind shields (3), the two ends of the output shaft (2a) of the dual-output motor (2) respectively extend into the two wind shields (3) and are respectively fixedly connected to the two axial flow blades (4), characterized in that: A finned tube radiator (1) is provided on one side of the dual-output motor (2), and the air inlet (13) of the high-pressure pump head and the air outlet (14) of the low-pressure pump head are respectively connected to the air outlet and the air inlet of the finned tube radiator (1) through pipe fittings (6); a long strip-shaped air guide channel (7) is formed between the finned tube radiator (1) and the outer wall of the housing of the dual-output motor (2), the length of the air guide channel (7) extending along the axial direction of the dual-output motor (2), the two ends of the air guide channel (7) are respectively connected to the inner cavities of the two wind hoods (3), and the wind introduced into the air guide channel (7) from the wind hood (3) is blown out in the direction of the finned tubes of the finned tube radiator (1).

2. The novel two-stage compression air compressor according to claim 1 is characterized in that: The high-pressure pump head further comprises a cylinder (8) vertically fixed on the corresponding wind cover (3) and a cylinder head (9) fixed on the cylinder (8); a piston (10) is arranged in the cylinder (8); a valve plate (11) is horizontally arranged between the cylinder (8) and the cylinder head (9); an air intake chamber (12) is formed between the piston (10) and the valve plate (11); a cavity is formed between the top surface of the valve plate (11) and the inner wall of the cylinder head (9); a partition (9a) is vertically arranged in the cavity; the partition (9a) partitions the cavity into an air chamber 1 (9b) and an air chamber 2 (9c) which are not directly connected; and an exhaust hole (90) is arranged on the valve plate (11) so that the air chamber 2 (9c) is connected to the air intake chamber (12). 11a), and an exhaust valve plate for controlling the opening and closing of the exhaust hole (11a) is provided on the top wall of the valve plate (11); the air inlet (13) and the exhaust port of the high-pressure pump head are both arranged on the cylinder head (9), and the air inlet (13) and the exhaust port of the high-pressure pump head are respectively connected to the air chamber one (9b) and the air chamber two (9c); the valve plate (11) is provided with an air inlet (11b) for connecting the air chamber one (9b) and the air inlet cavity (12); a guide structure for enabling one-way conduction between the air chamber one (9b) and the air inlet cavity (12) is provided at the air inlet (11b), and the conduction direction of the one-way structure is consistent with the direction in which the gas is discharged from the air chamber one (9b) into the air inlet cavity (12).

3. The novel two-stage compression air compressor according to claim 2 is characterized in that: The partition plate (9a) and the cylinder cover (9) are an integrated structure; the upper side and both ends of the partition plate (9a) extend to the inner wall of the cavity; and a seal is formed between the lower side of the partition plate (9a) and the valve plate (11).

4. The novel two-stage compression air compressor according to claim 3 is characterized in that: A strip groove is formed on the bottom surface of the partition plate (9a) along the length direction of the partition plate (9a), and a sealing strip (15) is provided in the strip groove. The bottom surface of the sealing strip (15) is pressed tightly against the top surface of the valve plate (11), and both end surfaces of the sealing strip (15) are pressed tightly against the inner wall of the cavity.

5. The novel two-stage compression air compressor according to claim 4 is characterized in that: The one-way structure comprises an intake valve plate (16) arranged horizontally below the valve plate (11); the intake valve plate (16) is connected to the valve plate (11) in an upward sliding manner and has a limited downward movement distance; when the intake valve plate (16) moves upward, it can press on the bottom surface of the valve plate (11) and cover the intake hole (11b).

6. The novel two-stage compression air compressor according to claim 5 is characterized in that: A screw (17) is vertically fixed on the valve plate (11), and a through hole is provided on the air intake valve plate (16) for the rod of the screw (17) to pass through, and the diameter of the through hole is smaller than the outer diameter of the head of the screw (17).

7. The novel two-stage compression air compressor according to claim 1 is characterized in that: The high-pressure pump head and the low-pressure pump head also include a crank assembly (5) disposed in the wind cover (3) and connected to the output shaft (2a). A crankcase (18) for accommodating the corresponding crank assembly (5) is also disposed in the wind cover (3). The two ends of the output shaft (2a) respectively pass through the two crankcases (18) and are respectively fixedly connected to the two axial flow blades (4). The lower end of the cylinder barrel (8) extends into the corresponding wind cover (3) and is fixed to the corresponding crankcase (18). The inner cavities of the cylinder barrel (8) and the crankcase (18) are connected.

8. The novel two-stage compression air compressor according to claim 7 is characterized in that: In the high-pressure pump head, an air intake passage (19) and an air exhaust passage (20) both in the form of strips are provided between the wind cover (3) and the crankcase (18); the inlet of the air intake passage (19) and the outlet of the air exhaust passage (20) are both located outside the wind cover (3); the outlet of the air intake passage (19) and the inlet of the air exhaust passage (20) are both connected to the inner cavity of the crankcase (18); and an air guide pipe (21) is provided on the other side of the dual-output motor (2) to connect the outlet of the air exhaust passage (20) and the air intake of the low-pressure pump head.

9. The novel two-stage compression air compressor according to claim 8 is characterized in that: In the high-pressure pump head, through holes are horizontally penetrated on both sides of the crankcase (18), and two joints (22) are fixed outside the wind cover (3). One end of the two joints (22) extends into the wind cover (3) and is respectively inserted into the two through holes. The inner holes of the two joints (22) are the above-mentioned intake channel (19) and exhaust channel (20), and the other end of the joint (22) whose inner hole is the exhaust channel (20) is connected to the air guide pipe (21).

10. The novel two-stage compression air compressor according to claim 9 is characterized in that: The length of the air guide pipe (21) extends along the arrangement direction of the high-pressure pump head and the low-pressure pump head, and the outlet of the exhaust channel (20) and the air inlet of the low-pressure pump head are both arranged in flush positions.

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