Air inlet structure of two-stage compression air compressor

Abstract

The utility model provides an air inlet structure of a two-stage compression air compressor, and belongs to the field of air compressors. The problem that an existing air compressor is short in service life is solved. The air compressor comprises a high-pressure pump head and a low-pressure pump head which are connected in series, each of the high-pressure pump head and the low-pressure pump head comprises an air cylinder, a fan cover and a crank case arranged in the fan cover, the lower ends of cylinder barrels of the two air cylinders extend into the corresponding fan covers and are fixed on the corresponding crank cases, and inner cavities of the cylinder barrels and the corresponding crank cases are communicated. The air inlet structure comprises an air inlet channel and an exhaust channel which are arranged between the high-pressure pump head fan cover and the high-pressure pump head crank case, an inlet of the air inlet channel and an outlet of the exhaust channel are both located outside the high-pressure pump head fan cover, and an outlet of the air inlet channel and an inlet of the exhaust channel are both communicated with an inner cavity of the high-pressure pump head crank case. And an air guide pipe for communicating the outlet of the exhaust channel with the air inlet of the low-pressure pump head is also arranged outside the high-pressure pump head fan cover. The air inlet structure of the two-stage compression air compressor can prolong the service life of the air compressor.

Description

Technical Field

[0001] The utility model belongs to the field of air compressors, and relates to a two-stage compression air compressor, in particular to an air intake structure of a two-stage compression 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 two-stage compression air compressor which can extend the service life of the air compressor.

[0006] The purpose of the utility model can be achieved through the following technical solutions: an air intake structure of a two-stage compression air compressor, the air compressor includes a high-pressure pump head and a low-pressure pump head connected in series, the high-pressure pump head and the low-pressure pump head both include a cylinder, an air hood and a crank case arranged in the air hood, the lower ends of the cylinder barrels of the two cylinders both extend into the corresponding air hood and are fixed on the corresponding crank case, and the inner cavities of the cylinder barrels and the corresponding crank case are connected, and it is characterized in that the air intake structure includes an air intake channel and an exhaust channel arranged between the high-pressure pump head air hood and the high-pressure pump head crank case, the air intake channel and the exhaust channel are both strip-shaped, the inlet of the air intake channel and the outlet of the exhaust channel are both outside the high-pressure pump head air hood, the outlet of the air intake channel and the inlet of the exhaust channel are both connected to the inner cavity of the high-pressure pump head crank case, and an air duct connecting the outlet of the exhaust channel and the air inlet of the low-pressure pump head is also provided outside the high-pressure pump head air hood.

[0007] 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.

[0008] In the above-mentioned intake structure of the two-stage compression air compressor, through holes are horizontally penetrated on both sides of the high-pressure pump head crankcase, and two joints are fixed outside the high-pressure pump head wind cover, one end of the two joints extends into the high-pressure pump head wind cover and is respectively plugged 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.

[0009] In the air intake structure of the above-mentioned two-stage compression air compressor, the high-pressure pump head and the low-pressure pump head are arranged side by side, and the high-pressure pump head and the low-pressure pump head are both arranged on the same side of the air duct, which is convenient for the arrangement of the air duct.

[0010] 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 air inlet of the low-pressure pump head and the outlet of the exhaust channel 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.

[0011] Compared with the prior art, when the air intake structure of the two-stage compression air compressor is in use, external gas is drawn into the high-pressure pump head crankcase through the air intake channel, and is discharged into the air duct through the exhaust channel, and finally enters the low-pressure pump head. In this way, in actual use, external gas 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of a two-stage compression air compressor.

[0013] Figure 2 It is a radial cross-sectional diagram of a two-stage compression air compressor.

[0014] Figure 3 It is an axial cross-sectional schematic diagram of a two-stage compression air compressor.

[0015] In the figure, 1. high-pressure pump head; 2. low-pressure pump head; 3. dual-output motor; 4. axial flow blades; 5. crankcase; 6. cylinder; 7. joint; 8. air duct; 9. intake channel; 10. exhaust channel; 11. crank assembly; 12. wind hood. DETAILED DESCRIPTION

[0016] 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.

[0017] like Figure 1As shown, the two-stage compression air compressor includes a high-pressure pump head 1 and a low-pressure pump head 2 connected in series, that is, at this time, the air inlet of the high-pressure pump head 1 is connected to the air outlet of the low-pressure pump head 2. In the actual product, the high-pressure pump head 1 and the low-pressure pump head 2 are arranged side by side, and a dual-output motor 3 is horizontally arranged between the high-pressure pump head 1 and the low-pressure pump head 2.

[0018] Specifically,

[0019] like Figures 1 to 3 As shown, the basic structures of the high-pressure pump head 1 and the low-pressure pump head 2 are both existing, and the high-pressure pump head 1 and the low-pressure pump head 2 both include a cylinder 6, an air cover 12, and an axial flow blade 4 and a crank case 5 arranged in the air cover 12. Among them, the two air covers 12 are respectively fixed at the two ends of the dual-output motor 3, and the two ends of the output shaft of the dual-output motor 3 extend into the two air covers 12 respectively, and the two ends of the output shaft pass through the corresponding crank case 5 and are fixedly connected to the corresponding axial flow blade 4, and the lower ends of the cylinder barrels of the two cylinders 6 extend into the corresponding air cover 12 and are fixed on the corresponding crank case 5, and the inner cavities of the cylinder barrels and the corresponding crank case 5 are connected, and the output shaft drives the corresponding cylinder 6 to operate through the crank assembly 11 arranged in the crank case 5.

[0020] The crank assembly 11 is arranged in the crankcase 5, so that in actual design, the wind hood 12 of the high and low pressure pump heads 2 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.

[0021] like Figure 1 and Figure 2 As shown, the air intake structure of the two-stage compression air compressor includes an air intake channel 9 and an exhaust channel 10 arranged between the wind cover 12 of the high-pressure pump head 1 and the crankcase 5 of the high-pressure pump head 1. The air intake channel 9 and the exhaust channel 10 are both strip-shaped. The inlet of the air intake channel 9 and the outlet of the exhaust channel 10 are both outside the wind cover 12 of the high-pressure pump head 1. The outlet of the air intake channel 9 and the inlet of the exhaust channel 10 are both connected to the inner cavity of the crankcase 5 of the high-pressure pump head 1. An air guide pipe 8 is also provided outside the wind cover 12 of the high-pressure pump head 1 to connect the outlet of the exhaust channel 10 and the air inlet of the low-pressure pump head 2.

[0022] During use, external gas is drawn into the crankcase 5 of the high-pressure pump head 1 through the air inlet channel 9, and is discharged into the air duct 8 through the exhaust channel 10, and finally enters the low-pressure pump head 2. In this way, during actual use, external gas is first drawn into the crankcase 5 of the high-pressure pump head 1 to take away part of the temperature inside the crankcase 5, thereby further accelerating the heat dissipation of the high-pressure pump head 1 and improving the life and working stability of the air compressor.

[0023] In this embodiment,

[0024] like Figure 2As shown, the structure of the intake channel 9 and the exhaust channel 10 is as follows: through holes are horizontally penetrated on both sides of the crankcase 5 of the high-pressure pump head 1, and two joints 7 are fixed outside the wind cover 12 of the high-pressure pump head 1. One end of the two joints 7 extends into the wind cover 12 of the high-pressure pump head 1 and is respectively inserted into the two through holes. The inner holes of the two joints 7 are the above-mentioned intake channel 9 and exhaust channel 10, and the other end of the joint 7 with the inner hole of the exhaust channel 10 is connected to the air guide pipe 8. The above design is convenient for design and assembly.

[0025] The high-pressure pump head 1 and the low-pressure pump head 2 are both arranged on the same side of the air guide tube 8, which is convenient for the arrangement of the air guide tube 8. The length of the air guide tube 8 extends along the arrangement direction of the high-pressure pump head 1 and the low-pressure pump head 2, and the air inlet of the low-pressure pump head 2 and the outlet of the exhaust channel 10 are both arranged flush, which not only further facilitates assembly, but also allows the gas to flow smoothly into the low-pressure pump head 2.

[0026] In actual products, the end of the air guide tube 8 that is not connected to the connector 7 is connected to the air inlet of the low-pressure pump head 2 by means of a transfer tube.

[0027] 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. An air intake structure of a two-stage compression air compressor, the air compressor comprising a high-pressure pump head (1) and a low-pressure pump head (2) connected in series, the high-pressure pump head (1) and the low-pressure pump head (2) both comprising a cylinder (6), a wind cover (12) and a crankcase (5) arranged in the wind cover (12), the lower ends of the cylinder barrels of the two cylinders (6) both extend into the corresponding wind cover (12) and are fixed on the corresponding crankcase (5), and the inner cavities of the cylinder barrels and the corresponding crankcase (5) are communicated, characterized in that: The air intake structure comprises an air intake channel (9) and an exhaust channel (10) arranged between a wind cover (12) of a high-pressure pump head (1) and a crankcase (5) of the high-pressure pump head (1); the air intake channel (9) and the exhaust channel (10) are both strip-shaped; the inlet of the air intake channel (9) and the outlet of the exhaust channel (10) are both located outside the wind cover (12) of the high-pressure pump head (1); the outlet of the air intake channel (9) and the inlet of the exhaust channel (10) are both connected to the inner cavity of the crankcase (5) of the high-pressure pump head (1); and an air guide pipe (8) is also provided outside the wind cover (12) of the high-pressure pump head (1) to connect the outlet of the exhaust channel (10) and the air intake of the low-pressure pump head (2).

2. The air intake structure of the two-stage compression air compressor according to claim 1, characterized in that: Through holes are horizontally penetrated on both sides of the crankcase (5) of the high-pressure pump head (1). Two joints (7) are fixed outside the wind cover (12) of the high-pressure pump head (1). One end of the two joints (7) extends into the wind cover (12) of the high-pressure pump head (1) and is respectively inserted into the two through holes. The inner holes of the two joints (7) are the above-mentioned intake passage (9) and exhaust passage (10), respectively, and the other end of the joint (7) whose inner hole is the exhaust passage (10) is connected to the air guide pipe (8).

3. The air intake structure of the two-stage compression air compressor according to claim 1 or 2, characterized in that: The high-pressure pump head (1) and the low-pressure pump head (2) are arranged side by side, and the high-pressure pump head (1) and the low-pressure pump head (2) are both arranged on the same side of the air guide tube (8).

4. The air intake structure of the two-stage compression air compressor according to claim 3, characterized in that: The length of the air guide pipe (8) extends along the arrangement direction of the high-pressure pump head (1) and the low-pressure pump head (2), and the air inlet of the low-pressure pump head (2) and the outlet of the exhaust channel (10) are both arranged in flush positions.

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