Cooling system of air compressor

Abstract

The utility model relates to a cooling system, and provides a cooling system of an air compressor, which comprises an air compressor body, a first cooling branch and a second cooling branch, the air compressor body is provided with a first piston cavity and a second piston cavity; the first cooling branch sequentially passes through the first piston cavity, the first cooler, the second piston cavity and the second cooler; the first cooler is connected with a secondary compressed air outlet of the air compressor, and the second cooler is connected with a primary compressed air outlet of the air compressor. The cooling system of the air compressor can effectively cool the air compressor body and compressed air at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling systems, and more specifically, to a cooling system for an air compressor. Background Art

[0002] An air compressor, that is, an air compressor, is a device used to compress gas. The air compressor is similar in structure to a water pump. Most air compressors are reciprocating pistons, rotary vanes or rotary screws. Structures such as pistons, vanes or screws inside the air compressor for compressing air are usually driven by an electric motor.

[0003] When the air compressor is operating, its motor, piston cylinder, etc. will generate a large amount of heat. Common heat dissipation methods include air cooling and water cooling. For equipment like air compressors with a large amount of heat generation, water cooling is usually more suitable (channels or cavities for cooling water flow are provided on the outer wall of the motor and the outer wall of the piston cylinder). Moreover, when the air compressor compresses air, it usually does not compress the air to the specified air pressure in one go, but through multiple compressions. However, the temperature of the compressed air will rise after each compression. After the temperature rises, it is not only not conducive to the heat dissipation of the air compressor, but also makes the compression more difficult. Therefore, it is necessary to cool and lower the temperature of the compressed air after each compression. The cooling of the compressed air and the cooling of the air compressor body are usually independent, which makes the cooling system of the entire air compression system very cumbersome, with numerous pipelines, and is a significant burden on the installation and distribution of cooling water pumps and cooling water pipes. Therefore, it is necessary to design a more reasonable cooling system for an air compressor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cooling system for an air compressor, which can effectively cool the air compressor body and the compressed air simultaneously.

[0005] The embodiment of the utility model is realized through the following technical solutions: The cooling system for an air compressor of the utility model includes an air compressor body, a first cooling branch and a second cooling branch; the air compressor body is provided with a first piston chamber and a second piston chamber; the first cooling branch sequentially passes through the first piston chamber, a first cooler, the second piston chamber, and a second cooler; the first cooler is connected to the secondary compressed air outlet of the air compressor, and the second cooler is connected to the primary compressed air outlet of the air compressor.

[0006] Further, the first cooling branch further includes an electric motor provided downstream of the second cooler, and a control box provided downstream of the electric motor.

[0007] Further, a third cooling branch is provided at the connection between the first cooling branch and the control box. A bypass valve is provided on the third cooling branch. The third cooling branch is in parallel with the control box. The end of the third cooling branch is communicated with the end of the first cooling branch.

[0008] Further, the starting end of the second cooling branch is connected to the starting end of the first cooling branch, and the end of the second cooling branch is connected to the inlet end of the control box. An oil cooler is provided on the second cooling branch.

[0009] Further, a drain valve is further included. The drain valve is connected to the first piston chamber, the second piston chamber, the first cooler, the second cooler, and the oil cooler at the same time.

[0010] Further, the first cooler and the second cooler have the same structure.

[0011] Further, the first cooler includes a housing, a plurality of air guide pipes provided in the housing, a pair of sealing plates respectively provided at both ends of the air guide pipes, an air inlet pipe connected to one end of the housing, an exhaust pipe connected to the other end of the housing, a water inlet pipe connected to the side wall of the housing, and a drain pipe connected to the side wall of the housing. A plurality of ventilation holes are provided on the sealing plate, the end of the air guide pipe is clamped in the ventilation hole, and both the water inlet pipe and the drain pipe are provided between the pair of sealing plates.

[0012] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: In the cooling system of the air compressor of the present invention, when in use, the external cooling water sequentially passes through the first piston chamber, the first cooler, the second piston chamber, and the second cooler. When passing through the first piston chamber and the second piston chamber, it can cool the air compressor. When passing through the first cooler, it can cool the secondary compressed air generated by the air compressor. When passing through the second cooler, it can cool the primary compressed air generated by the air compressor. In this way, through the first cooling branch, it is possible to cool the air compressor body and the primary compressed air and secondary compressed air generated by the air compressor, reduce the distribution of pipelines, and improve the utilization rate of cooling water. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0014] Figure 1Schematic diagram of the cooling system of the air compressor provided by the embodiment of the present utility model;

[0015] Figure 2 Schematic diagram of the structure of the first cooler part provided by the embodiment of the present utility model;

[0016] Figure 3 Schematic diagram of the internal structure of the first cooler provided by the embodiment of the present utility model.

[0017] Icon: 11 - air compressor body, 12 - first piston chamber, 13 - second piston chamber, 14 - first cooling branch, 15 - first cooler, 151 - housing, 152 - air guide pipe, 153 - sealing plate, 154 - intake pipe, 155 - exhaust pipe, 156 - water inlet pipe, 157 - drain pipe, 16 - second cooler, 17 - motor, 18 - control box, 19 - second cooling branch, 110 - lubricating oil cooler, 111 - drain valve, 112 - third cooling branch, 113 - bypass valve. Detailed implementation manners

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0020] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] Embodiment

[0024] The following is further described in conjunction with specific embodiments. As shown in the attached Figure 1 - Attached Figure 3As shown in the figure, the cooling system of the air compressor in this embodiment includes an air compressor body 11, a first cooling branch 14, and a second cooling branch 19; the air compressor body 11 is provided with a first piston chamber 12 and a second piston chamber 13; the first cooling branch 14 sequentially passes through the first piston chamber 12, the first cooler 15, the second piston chamber 13, and the second cooler 16; the first cooler 15 is connected to the secondary compressed air outlet of the air compressor, and the second cooler 16 is connected to the primary compressed air outlet of the air compressor. Specifically, during use, external cooling water passes through the first piston chamber 12, the first cooler 15, the second piston chamber 13, and the second cooler 16 in sequence. When passing through the first piston chamber 12 and the second piston chamber 13, it can cool the air compressor. When passing through the first cooler 15, it can cool the secondary compressed air generated by the air compressor. When passing through the second cooler 16, it can cool the primary compressed air generated by the air compressor. In this way, through the first cooling branch 14, it is possible to cool the air compressor body and the primary and secondary compressed air generated by the air compressor, reduce the distribution of pipelines, and improve the utilization rate of cooling water. It should be noted that the first cooling branch 14 passing through the first piston chamber 12 and the second piston chamber 13 does not mean that the cooling water needs to flow into the first piston chamber 12 and the second piston chamber 13, but flows through the water cooling chambers on the outer walls of the first piston chamber 12 and the second piston chamber 13. This channel already exists at the beginning of the design and manufacture of the air compressor. Most equipment that commonly needs to be cooled by water has such a water cooling chamber, and the first cooler 15 and the second cooler 16 are conventional heat exchange devices that cool the high-temperature compressed air through cooling water.

[0025] The first cooling branch 14 in this embodiment further includes a motor 17 provided downstream of the second cooler 16 and a control box 18 provided downstream of the motor 17. A third cooling branch 112 is provided at the connection between the first cooling branch 14 and the control box 18, and a bypass valve 113 is provided on the third cooling branch 112; the third cooling branch 112 is in parallel with the control box 18; the end of the third cooling branch 112 is communicated with the end of the first cooling branch. Specifically, the first cooling branch 14 can also cool the motor 17 and the control box 18. The principle is the same as that of cooling the air compressor, which is to pass cooling water into the water cooling chambers originally existing in the motor 17 and the control box 18 for cooling and temperature reduction. And since the control box 18 does not require much cooling water, by setting the third cooling branch 112 and the bypass valve 113, the cooling water can pass through the control box 18 and the third cooling branch 112 at the same time. By adjusting the bypass valve 113, the water flow rate of the third cooling branch 112 can be adjusted, and thus the water flow rate through the control box 18 can be adjusted.

[0026] In this embodiment, the starting end of the second cooling branch 19 is connected to the starting end of the first cooling branch 14, and the ending end of the second cooling branch 19 is connected to the inlet end of the control box 18; a lubricating oil cooler 110 is provided on the second cooling branch 19. Specifically, the independent second cooling branch 19 is provided to specifically cool the lubricating oil. The lubricating oil cooler 110 is basically similar in structure to the first cooler 15 and the second cooler 16, both of which are of the structure of a conventional heat exchanger. The difference is that the first cooler 15 is used to cool the gas, while the lubricating oil cooler 110 is used to cool the lubricating oil. The independent second cooling branch 19 for lubricating oil cooling is to avoid too many structures on the first cooling branch 14, which will cause too much pressure on the cooling water and result in poor cooling effect.

[0027] In this embodiment, a drain valve 111 is further included, and the drain valve 111 is connected to the first piston chamber 12, the second piston chamber 13, the first cooler 15, the second cooler 16, and the lubricating oil cooler 110 at the same time. Specifically, the drain valve 111 is to avoid too high pressure of the cooling water in the chambers of each device.

[0028] The first cooler 15 and the second cooler 16 in this embodiment have the same structure (as shown in the appendix Figure 2 - appendix Figure 3 ). The first cooler 15 includes a housing 151, a plurality of gas guide pipes 152 provided in the housing 151, a pair of sealing plates 153 respectively provided at both ends of the gas guide pipes 152, an intake pipe 154 connected to one end of the housing 151, an exhaust pipe 155 connected to the other end of the housing 151, a water inlet pipe 156 connected to the side wall of the housing 151, and a drain pipe 157 connected to the side wall of the housing 151; a plurality of ventilation holes are provided on the sealing plates 153, the ends of the gas guide pipes 152 are clamped in the ventilation holes, and both the water inlet pipe 156 and the drain pipe 157 are provided between the pair of sealing plates 153. Specifically, the gas (or liquid) to be cooled is sent into the housing 151 through the intake pipe 154, discharged from the exhaust pipe 155 after passing through the gas guide pipes 152, the cooling water is sent into the interior of the housing 151 through the water inlet pipe 156, contacts the outer wall of the gas guide pipes 152, and is discharged from the drain pipe 157 after heat exchange, thus completing the process of cooling heat exchange.

[0029] In summary, for the cooling system of the air compressor in this embodiment, when in use, the external cooling water sequentially passes through the first piston chamber 12, the first cooler 15, the second piston chamber 13, and the second cooler 16. When passing through the first piston chamber 12 and the second piston chamber 13, it can cool the air compressor. When passing through the first cooler 15, it can cool the secondary compressed air generated by the air compressor. When passing through the second cooler 16, it can cool the primary compressed air generated by the air compressor. In this way, through the first cooling branch 14, it is possible to cool the air compressor body and the primary and secondary compressed air generated by the air compressor, reduce the distribution of pipelines, and improve the utilization rate of the cooling water.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cooling system for an air compressor, characterized in that: The air compressor comprises an air compressor body (11), a first cooling branch (14) and a second cooling branch (19); the air compressor body (11) is provided with a first piston chamber (12) and a second piston chamber (13); the first cooling branch (14) passes through the first piston chamber (12), a first cooler (15), the second piston chamber (13) and a second cooler (16) in sequence; The first cooler (15) is connected to the secondary compressed air outlet of the air compressor, and the second cooler (16) is connected to the primary compressed air outlet of the air compressor.

2. The cooling system of the air compressor according to claim 1, characterized in that: The first cooling branch (14) further comprises an electric motor (17) arranged downstream of the second cooler (16), and a control box (18) arranged downstream of the electric motor (17).

3. The cooling system of the air compressor according to claim 2, characterized in that: A third cooling branch (112) is provided at the connection between the first cooling branch (14) and the control box (18), and a bypass valve (113) is provided on the third cooling branch (112); the third cooling branch (112) is connected in parallel with the control box (18); and the end of the third cooling branch (112) is connected to the end of the first cooling branch.

4. The cooling system of the air compressor according to claim 2, characterized in that: The starting end of the second cooling branch (19) is connected to the starting end of the first cooling branch (14), and the end of the second cooling branch (19) is connected to the inlet end of the control box (18); and a lubricating oil cooler (110) is provided on the second cooling branch (19).

5. The cooling system of the air compressor according to claim 4, characterized in that: It also includes a drain valve (111), which is simultaneously connected to the first piston chamber (12), the second piston chamber (13), the first cooler (15), the second cooler (16), and the lubricating oil cooler (110).

6. The cooling system of the air compressor according to claim 1, characterized in that: The first cooler (15) and the second cooler (16) have the same structure.

7. The cooling system of the air compressor according to claim 6, characterized in that: The first cooler (15) comprises a shell (151), a plurality of air guide pipes (152) arranged in the shell (151), a pair of sealing plates (153) respectively arranged at both ends of the air guide pipes (152), an air intake pipe (154) connected to one end of the shell (151), an exhaust pipe (155) connected to the other end of the shell (151), a water intake pipe (156) connected to the side wall of the shell (151), and a drain pipe (157) connected to the side wall of the shell (151); The sealing plate (153) is provided with a plurality of air holes, the ends of the air guide pipe (152) are clamped in the air holes, and the water inlet pipe (156) and the drain pipe (157) are both provided between a pair of the sealing plates (153).

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