Oil-free piston compressor

Abstract

The present invention relates to the field of compressors, and specifically discloses an intercooler and an oil-free piston compressor including the intercooler. The intercooler includes a heat sink, the heat sink includes a plurality of heat dissipation tubes arranged side by side, a heat dissipation space is formed between two adjacent heat dissipation tubes, and a heat dissipation fin is arranged in the heat dissipation space; each of the heat dissipation tubes is provided with a heat dissipation channel that runs through the heat dissipation tube along the axial direction; it also includes a head that is arranged at both ends of the heat sink and is detachably connected to the heat sink, and a gas distribution channel is arranged in the head; a plurality of the heat dissipation channels are connected end to end in sequence through the gas distribution channel; it also includes a cooling air inlet and a cooling air outlet. The intercooler described above has a simple structure and a good heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and in particular to an intercooler and an oil-free piston compressor comprising the intercooler. Background Art

[0002] The air compressor is the main body of the air source device. It is a device that converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy and is a gas pressure generating device for compressed air. Multi-stage compression is a common way to increase the pressure of compressed air. Usually, an intermediate cooling link is set between each level of compression to improve the work efficiency of the compressor. To a certain extent, the cooling effect of the intermediate cooling device limits the maximum exhaust pressure of the compressor. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an intercooler and an oil-free piston compressor comprising the intercooler, wherein the intercooler has a simple structure and good heat dissipation effect.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: an intercooler includes a heat sink, the heat sink includes a plurality of heat dissipation tubes arranged side by side, a heat dissipation space is formed between two adjacent heat dissipation tubes, and a heat dissipation fin is arranged in the heat dissipation space; each of the heat dissipation tubes is provided with a heat dissipation channel that penetrates the heat dissipation tube along the axial direction; it also includes a head that is arranged at both ends of the heat sink and is detachably connected to the heat sink, and the head is provided with an air distribution channel; the plurality of heat dissipation channels are connected end to end in sequence through the air distribution channel; it also includes a cooling air inlet and a cooling air outlet.

[0005] Preferably, the heat dissipation channel gradually shrinks from both ends to the middle.

[0006] The end-to-end connection is adopted to increase the total length of the heat dissipation channel, thereby improving the cooling effect. The heat dissipation channel gradually shrinks from both ends to the middle, which is not only convenient for demoulding during production and processing, but also the airflow is pressurized and heated in the process of flowing to the middle of the heat dissipation channel due to the reduction of cross-sectional area, thereby improving the heat dissipation efficiency and thus improving the cooling effect.

[0007] An oil-free piston compressor comprises a motor, a first-stage compression assembly and a second-stage compression assembly, wherein the motor is located between the first-stage compression assembly and the second-stage compression assembly, and the motor drives the first-stage compression assembly and the second-stage compression assembly to work simultaneously; the first-stage compression assembly comprises a first-stage transmission box and a first-stage cylinder, and the second-stage compression assembly comprises a second-stage transmission box and a second-stage cylinder; and further comprises an intercooler as described above, wherein the first-stage air outlet of the first-stage compression assembly is connected to the cooling air inlet of the intercooler through an air inlet pipe, and the second-stage air inlet of the second-stage compression assembly is connected to the cooling air outlet of the intercooler through an air outlet pipe.

[0008] The motor is located between the primary compression assembly and the secondary compression assembly. The whole machine runs more smoothly, with lower noise and less vibration. The appearance structure is more compact and beautiful, and sufficient space is left for the installation of the intercooler.

[0009] Preferably, the first-stage cylinder comprises a first-stage cylinder body and a first-stage cylinder head, a first-stage piston is arranged in the first-stage cylinder body, a first-stage air intake valve is arranged on the first-stage piston, and a first-stage air intake joint is arranged on the first-stage transmission box; a first-stage valve plate is arranged between the first-stage cylinder body and the first-stage cylinder head, and a first-stage air outlet valve corresponding to the first-stage air outlet is arranged on the first-stage valve plate. The first-stage compression assembly adopts a piston top air intake structure to improve the overall cooling effect.

[0010] Preferably, the secondary cylinder comprises a secondary cylinder body and a secondary cylinder head, the secondary cylinder head is provided with a secondary air intake chamber connected with the secondary air intake port, and a secondary exhaust chamber connected with the secondary air outlet, the secondary air intake chamber is arranged in a ring around the secondary exhaust chamber; the secondary cylinder body is provided with a secondary piston, a secondary valve plate is provided between the secondary cylinder body and the secondary cylinder head, the secondary valve plate is provided with a secondary air intake valve corresponding to the secondary air intake chamber, and a secondary exhaust valve corresponding to the secondary exhaust chamber.

[0011] Preferably, a piston ring is provided on the secondary piston, a gasket is provided inside the piston ring, and a guide ring is provided outside the secondary piston. The provision of the gasket and the guide ring can improve the sealing effect between the piston and the cylinder wall.

[0012] Preferably, the primary piston and the secondary piston respectively include a piston pin, an oil storage cavity is provided in the piston pin, and a lubrication hole penetrating the side wall of the oil storage cavity is provided on the side wall of the oil storage cavity, and the oil storage cavity is filled with high temperature resistant grease to provide lubrication for the connection between the piston and the connecting rod and improve the service life.

[0013] Preferably, it also includes a base, and the motor, the first-stage compression assembly and the second-stage compression assembly are all arranged on the base; it also includes an air-cooling assembly, and the air-cooling assembly includes a fan arranged below the base, and an air guide cover wrapped around the outside of the first-stage transmission box and the second-stage transmission box, and cooling spaces are formed between the air guide cover and the first-stage transmission box and the second-stage transmission box respectively; the base is also provided with air guide holes corresponding to the fan and connected to the cooling space. The air guide holes and the air guide cover together constitute an airflow passage, which guides the airflow to dissipate heat from the compression assembly, and the airflow is concentrated, with a good cooling effect. At the same time, the fan is arranged below the bottom plate, with a compact and beautiful structure and a more reasonable layout. Compared with the traditional layout, the fan has less interference with the compression assembly and the motor, and is more convenient to assemble and maintain.

[0014] Preferably, the outer side walls of the first-stage cylinder and the second-stage cylinder are provided with a heat dissipation portion, the heat dissipation portion is provided with a heat dissipation through hole penetrating the heat dissipation portion in the height direction, the lower end of the heat dissipation through hole is aligned with the cooling space. The airflow flowing out of the cooling space enters the heat dissipation through hole to dissipate heat from the cylinder.

[0015] Preferably, a bottom plate is connected below the base, and an installation space for installing a fan is formed between the bottom plate and the base. The bottom plate protects the fan and can also reduce the suction of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a full cross-sectional view of the cooler in this embodiment;

[0017] Figure 2 An exploded view of the cooler in this embodiment;

[0018] Figure 3 Schematic diagram of the structure of the oil-free piston compressor of this embodiment;

[0019] Figure 4 is an exploded view of the oil-free piston compressor of this embodiment;

[0020] Figure 5 It is a partial cross-sectional view of the first-stage compression assembly of the oil-free piston compressor of this embodiment;

[0021] Figure 6 It is a partial cross-sectional view of the two-stage compression assembly of the oil-free piston compressor of this embodiment;

[0022] Figure 7 Schematic diagram of the structure of the primary valve plate assembly in the oil-free piston compressor of this embodiment;

[0023] Figure 8 Schematic diagram of the structure of the first-stage piston in the oil-free piston compressor of this embodiment;

[0024] Fig. 9 Schematic diagram of the structure of the secondary valve plate assembly in the oil-free piston compressor of this embodiment;

[0025] Fig.10 Schematic diagram of the structure of the secondary piston in the oil-free piston compressor of this embodiment. Implementation

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example

[0027] like Figure 1 and Figure 2 As shown, an intercooler includes a heat sink 81, wherein the heat sink 81 includes a plurality of heat dissipation tubes arranged side by side, a heat dissipation space is formed between two adjacent heat dissipation tubes, and a heat dissipation fin 811 is arranged in the heat dissipation space. A heat dissipation channel 812 is arranged in each heat dissipation tube and runs through the heat dissipation tube along the axial direction. The heat dissipation channel 812 gradually shrinks from both ends to the middle. It also includes a head 82 arranged at both ends of the heat dissipation tube 81 and detachably connected to the heat dissipation tube 81, and an air distribution channel 821 is arranged in the head 82. Several heat dissipation channels 812 are connected end to end in sequence through the air distribution channel 821. It also includes a cooling air inlet 83 and a cooling air outlet 84.

[0028] The total length of the heat dissipation channel 812 is increased by connecting end to end, thereby improving the cooling effect. The heat dissipation channel 812 gradually shrinks from both ends to the middle, which is not only convenient for demoulding during production and processing, but also the airflow is pressurized and heated up in the process of flowing to the middle of the heat dissipation channel 812 due to the reduction of the cross-sectional area, thereby improving the heat dissipation efficiency and thus improving the cooling effect.

[0029] like Figure 3 and Figure 4 As shown, an oil-free piston compressor includes a motor 3, a primary compression assembly 1 and a secondary compression assembly 4, wherein the motor 3 is located between the primary compression assembly 1 and the secondary compression assembly 4, and the motor 3 drives the primary compression assembly 1 and the secondary compression assembly 4 to work simultaneously. The primary compression assembly 1 includes a primary transmission box 16 and a primary cylinder, and the secondary compression assembly 4 includes a secondary transmission box 47 and a secondary cylinder. It also includes the intercooler 8 as described above, wherein the primary air outlet of the primary compression assembly 1 is connected to the cooling air inlet 83 of the intercooler 8 through an air inlet pipe 21, and the secondary air inlet of the secondary compression assembly 4 is connected to the cooling air outlet 84 of the intercooler 8 through an air outlet pipe 22. A safety valve is provided between the primary compression assembly 1 and the intercooler 8. The primary compression assembly 1 includes two cylinders, and the two cylinders are arranged in a "V" shape. An exhaust pipe 43 is connected to the secondary transmission box 47, and a one-way valve 44 is provided on the exhaust pipe 43.

[0030] like Figure 3-Figure 5 As shown, the primary cylinder comprises a primary cylinder body 12 and a primary cylinder head 11, a primary piston 14 is arranged in the primary cylinder body 12, a primary air inlet valve is arranged on the primary piston 14, and a primary air inlet connector 13 is arranged on the primary transmission box. A primary valve plate 15 is arranged between the primary cylinder body 12 and the primary cylinder head 11, and a primary air outlet valve corresponding to the primary air outlet is arranged on the primary valve plate 15.

[0031] like Figure 8As shown, the primary piston 14 is provided with a primary air intake passage 143 communicating with the inner cavity of the transmission box and the inner cavity of the cylinder, and the primary air intake valve comprises a primary air intake valve plate 142 and an air intake stop screw 141 arranged above the piston. Figure 7 As shown, the first-level valve plate 15 is provided with a first-level air outlet channel 151; the first-level air outlet valve includes a first-level exhaust valve plate 152 and a first-level exhaust fixed plate 153 arranged above the first-level valve plate 15; the bottom of the first-level valve plate is provided with an avoidance hole 154 corresponding to the air intake limit screw 141.

[0032] like Figure 3 , Figure 4 and Figure 6 As shown, the secondary cylinder comprises a secondary cylinder body and a secondary cylinder cover 42. The secondary cylinder cover 42 is provided with a secondary air intake chamber connected to the secondary air intake port, and a secondary air exhaust chamber connected to the secondary air outlet. The secondary air intake chamber is arranged in a ring around the secondary air exhaust chamber. The secondary cylinder body is provided with a secondary piston 46. A secondary valve plate 45 is provided between the secondary cylinder body and the secondary cylinder cover 42. The secondary valve plate 45 is provided with a secondary air intake valve 452 corresponding to the secondary air intake chamber, and a secondary air exhaust valve 451 corresponding to the secondary air exhaust chamber. Fig.10 As shown, the secondary piston 46 is provided with a piston ring 462, and a gasket 461 is provided inside the piston ring 462. A guide ring 463 is also provided outside the secondary piston 46. The provision of the gasket 461 and the guide ring 463 can improve the sealing effect between the piston and the cylinder wall. Fig. 9 As shown, the secondary intake valve 452 is arranged below the valve plate, and the secondary exhaust valve 451 is arranged above the valve plate.

[0033] like Figure 8 and Fig.10 As shown, the primary piston 14 and the secondary piston 46 respectively include a piston pin 7, an oil storage cavity 72 is provided in the piston pin 7, and a lubrication hole 71 penetrating the side wall of the oil storage cavity 72 is provided, and the oil storage cavity 72 is filled with high temperature resistant grease. Lubrication is provided for the connection between the piston and the connecting rod to increase the service life. The inner walls of the primary cylinder and the secondary cylinder are anodized to improve the wear resistance.

[0034] like Figure 3 and Figure 4As shown, it also includes a base 62, and the motor 3, the first-stage compression assembly 1 and the second-stage compression assembly 4 are all arranged on the base 62. It also includes an air cooling assembly, which includes a fan 53 arranged below the base 62, and an air guide 51 wrapped around the outside of the first-stage transmission box 16 and the second-stage transmission box 47, and cooling spaces are formed between the air guide 51 and the first-stage transmission box 16 and the second-stage transmission box 47. The base is also provided with an air guide hole 54 corresponding to the fan 53 and connected to the cooling space. The air guide hole 54 and the air guide 51 together constitute an air flow passage, guiding the air flow to dissipate heat to the compression assembly, and the air flow is concentrated, and the cooling effect is good. At the same time, the fan 53 is arranged below the bottom plate 61, with a compact and beautiful structure and a more reasonable layout. Compared with the traditional layout, the fan 53 has less interference with the compression assembly and the motor 3, and is more convenient to assemble and maintain. The outer wall of the first-stage cylinder and the second-stage cylinder is provided with a heat dissipation portion, and the heat dissipation portion is provided with a heat dissipation through hole 52 that penetrates the heat dissipation portion in the height direction, and the lower end of the heat dissipation through hole 52 is aligned with the cooling space. The airflow flowing out of the cooling space enters the heat dissipation through hole 52 to dissipate heat from the cylinder. A bottom plate 61 is connected below the base 62, and an installation space for installing the fan 53 is formed between the bottom plate 61 and the base 62. The bottom plate 61 protects the fan 53 and can also reduce the inhalation of impurities.

[0035] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil-free piston compressor, characterized in that: It includes a motor, a primary compression assembly and a secondary compression assembly, wherein the motor is located between the primary compression assembly and the secondary compression assembly, and the motor drives the primary compression assembly and the secondary compression assembly to work at the same time; the primary compression assembly includes a primary transmission box and a primary cylinder, and the secondary compression assembly includes a secondary transmission box and a secondary cylinder; It also includes an intercooler, the intercooler includes a heat sink, the heat sink includes a plurality of heat pipes arranged side by side, a heat dissipation space is formed between two adjacent heat pipes, and a heat dissipation fin is arranged in the heat dissipation space; each of the heat pipes is provided with a heat dissipation channel that runs through the heat pipe along the axial direction; it also includes a sealing head that is arranged at both ends of the heat sink and is detachably connected to the heat sink, and an air distribution channel is arranged in the sealing head; the plurality of heat dissipation channels are connected end to end in sequence through the air distribution channel; it also includes a cooling air inlet and a cooling air outlet; The first-stage air outlet of the first-stage compression assembly is connected to the cooling air inlet of the intercooler through an air inlet pipe, and the second-stage air inlet of the second-stage compression assembly is connected to the cooling air outlet of the intercooler through an air outlet pipe; It also includes a base, on which the motor, the first-stage compression assembly and the second-stage compression assembly are all arranged; it also includes an air cooling assembly, which includes a fan arranged below the base, and an air guide cover covering the outside of the first-stage transmission box and the second-stage transmission box, wherein cooling spaces are formed between the air guide cover and the first-stage transmission box and the second-stage transmission box respectively; the base is also provided with air guide holes corresponding to the fan and connected to the cooling space; The outer side walls of the first-stage cylinder and the second-stage cylinder are provided with a heat dissipation portion, and the heat dissipation portion is provided with a heat dissipation through hole penetrating the heat dissipation portion in the height direction, and the lower end of the heat dissipation through hole is aligned with the cooling space; A bottom plate is connected below the base, and an installation space for installing the fan is formed between the bottom plate and the base.

2. The oil-free piston compressor according to claim 1, characterized in that: The heat dissipation channel of the intercooler gradually shrinks from both ends to the middle.

3. The oil-free piston compressor according to claim 1, characterized in that: The first-stage cylinder comprises a first-stage cylinder body and a first-stage cylinder cover, the first-stage cylinder body is provided with a first-stage piston, the first-stage piston is provided with a first-stage air intake valve, and the first-stage transmission box is provided with a first-stage air intake joint; a first-stage valve plate is provided between the first-stage cylinder body and the first-stage cylinder cover, and the first-stage valve plate is provided with a first-stage air outlet valve corresponding to the first-stage air outlet.

4. The oil-free piston compressor according to claim 3, characterized in that: The secondary cylinder comprises a secondary cylinder body and a secondary cylinder head, wherein the secondary cylinder head is provided with a secondary air intake chamber connected with the secondary air intake port, and a secondary exhaust chamber connected with the secondary air outlet, and the secondary air intake chamber is arranged in a ring around the secondary exhaust chamber; the secondary cylinder body is provided with a secondary piston, a secondary valve plate is provided between the secondary cylinder body and the secondary cylinder head, and the secondary valve plate is provided with a secondary air intake valve corresponding to the secondary air intake chamber, and a secondary exhaust valve corresponding to the secondary exhaust chamber.

5. The oil-free piston compressor according to claim 4, characterized in that: A piston ring is arranged on the secondary piston, a liner is arranged on the inner side of the piston ring, and a guide ring is arranged on the outer side of the secondary piston.

6. The oil-free piston compressor according to claim 4 or 5, characterized in that: The primary piston and the secondary piston respectively include a piston pin, an oil storage cavity is arranged in the piston pin, and a lubrication hole penetrating the side wall of the oil storage cavity is arranged on the side wall of the oil storage cavity, and the oil storage cavity is filled with high temperature resistant grease.

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