Cooling device and air compressor

Abstract

The utility model provides a cooling device and an air compressor, and belongs to the technical field of air compressor cooling. The cooling device comprises a liquid cooling system and an air cooling system; the liquid cooling system is arranged in the air compressor and is used for cooling a main body and a motor of the air compressor; the air cooling system comprises an air supply pipeline arranged at the liquid cooling system, and the air supply pipeline provides low-temperature airflow for the interior of the air compressor so as to cool the interior of the air compressor. According to the cooling device, when the air compressor works, the surface of the air compressor is cooled through the water cooling system, internal parts of the air compressor are cooled through the air cooling system, the air compressor can be cooled to the maximum extent through cooperation of the water cooling system and the air cooling system, and the internal parts of the air compressor are prevented from being overheated. According to the cooling device, the air cooling system is cooled through the water cooling system, a cold source does not need to be arranged for the air cooling system, and the interior of the air compressor is cooled.

Description

Technical Field

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

[0002] Air compressors are commonly used in air conditioners, refrigerators, and cold storage. Air compressors generate high temperatures during operation, requiring a cooling system to prevent overheating. Existing technology typically uses water cooling, with a cooling water tank installed outside the compressor. However, this existing technology suffers from the following drawbacks: water cooling can only cool the exterior of the compressor and cannot effectively cool the internal components. Utility Model Content

[0003] The purpose of the utility model is to provide an air compressor, aiming to solve the problem in the prior art that the cooling system of the air compressor cannot cool the components inside the air compressor.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a cooling device and an air compressor.

[0005] In a first aspect, the cooling device provided by the present invention comprises:

[0006] A liquid cooling system is provided inside the air compressor for cooling the main body and motor of the air compressor; and

[0007] The air cooling system includes an air supply duct arranged at the liquid cooling system, and the air supply duct provides low-temperature air flow to the interior of the air compressor so as to cool the interior of the air compressor.

[0008] In a possible implementation, the liquid cooling system includes a water tank covering the outside of the air compressor and a water cooling pipe coiled inside the air compressor, and the water tank supplies water to the water cooling pipe.

[0009] In a possible implementation, the air supply duct is coiled inside the air compressor, and the air supply duct is arranged in a gap between the water cooling ducts.

[0010] In a possible implementation, a mounting groove is provided on the outside of the water tank, and the air supply duct is arranged in the mounting groove.

[0011] In a possible implementation, the air supply duct is disposed inside the water tank.

[0012] In a possible implementation, the air inlet of the air supply duct is connected to the turbine end of the air compressor, and the air outlet of the air supply duct is connected to the interior of the air compressor.

[0013] In a possible implementation, the air cooling system further includes a return pipe, one end of which is connected to the interior of the air compressor, and the other end of which is connected to the compression end of the air compressor.

[0014] In a possible implementation, the water tank is provided with a water inlet and a water outlet.

[0015] In a possible implementation, the drain outlet and the water inlet are both arranged at the top.

[0016] In a second aspect, the air compressor provided by the present invention includes the cooling device as described in the first aspect.

[0017] The air compressor provided by the present invention has the following beneficial effects: Compared with the prior art, the cooling device provided by the present invention cools the surface of the air compressor through a water cooling system and cools the internal components of the air compressor through an air cooling system when the air compressor is in operation. The cooperation of the water cooling system and the air cooling system can cool the air compressor to the greatest extent possible, thereby preventing overheating of the internal components of the air compressor. The cooling device provided by the present invention cools the air cooling system through a water cooling system, eliminating the need to provide a cold source for the air cooling system, and cools the interior of the air compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of the cooling device and the air compressor provided in Example 1 of the present utility model;

[0020] Figure 2 A schematic diagram of the structure of the water cooling pipe and the air supply pipe provided in Example 1 of the present utility model;

[0021] Figure 3 This is a structural diagram of the water tank and air supply duct provided in Example 1 of the present utility model.

[0022] Description of reference numerals:

[0023] 1. Liquid cooling system; 11. Water tank; 12. Water inlet; 13. Drain outlet; 14. Mounting slot; 15. Water cooling pipe; 2. Air cooling system; 21. Air supply pipe; 22. Return pipe. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to 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.

[0025] Reference Figure 1 and Figure 2 Now, the cooling device and air compressor provided by the utility model are described.

[0026] In a first aspect, the utility model provides a cooling device.

[0027] Example 1

[0028] The cooling device provided in this embodiment includes a liquid cooling system 1 and an air cooling system 2, both located within the air compressor. The liquid cooling system 1 is used to cool the compressor's main body. It is in direct contact with the compressor's outer casing, cooling the compressor's main body and motor through heat exchange. The air cooling system 2 includes an air supply duct 21 located within the liquid cooling system 1. The air supply duct 21 provides low-temperature airflow to the interior of the compressor, thereby cooling the compressor.

[0029] Compared with the prior art, the air compressor provided by the present invention has a liquid cooling system 1 in contact with the air supply duct 21. Through heat exchange between the two, the liquid cooling system 1 reduces the temperature of the air flow in the air supply duct 21, thereby enabling the air cooling system 2 to provide low-temperature airflow for the components inside the air compressor, so as to cool the inside of the air compressor. When the air compressor is working, the cooling device cools the surface of the air compressor through the water cooling system and cools the internal components of the air compressor through the air cooling system 2. Through the cooperation of the water cooling system and the air cooling system 2, the air compressor can be cooled to the greatest extent, avoiding overheating of the internal components of the air compressor. The cooling device provided by the present invention cools the air cooling system 2 through the water cooling system, and there is no need to set a cold source for the air cooling system 2 to cool the inside of the air compressor.

[0030] Optionally, the liquid cooling system 1 includes a water tank 11 wrapped around the outside of the air compressor and a water-cooling pipe 15 coiled inside the air compressor. The water tank 11 supplies water to the water-cooling pipe 15. The water tank 11 is cylindrical and filled with low-temperature liquid. The water-cooling pipe 15 contacts the air compressor body and motor, cooling them.

[0031] Optionally, the air supply duct 21 is coiled inside the air compressor. A gap is provided between adjacent ramps of the air supply duct 21 and the water cooling duct 15, and the air supply duct 21 is positioned within the gap in the water cooling duct 15. The water cooling duct 15 cools the air compressor body and motor while also cooling the air supply duct 21. After cooling, the air in the air supply duct 21 is then fed into the gaps within the compressor's internal structure.

[0032] Optionally, the air inlet of the air supply duct 21 is connected to the turbine end of the air compressor, and the air outlet is connected to the interior of the air compressor. The turbine end of the air compressor is a high-temperature and high-pressure area. Under the action of high pressure, the air at the turbine end of the air compressor enters the air supply duct 21 from the air inlet of the air supply duct 21. When the airflow passes through the water tank 11, it is cooled and heat exchanged with the water in the water tank 11, thereby turning into low-temperature airflow.

[0033] A first connector is provided on the air compressor housing, and an air supply duct 21 is connected to the first connector. The air supply duct 21 is the same as the interior of the air compressor through the first connector. The low-temperature airflow in the air supply duct 21 enters the interior space of the air compressor through the first connector. A second connector is provided on the air compressor housing, and the second connector and the first connector are respectively arranged at both ends of the air compressor. After entering the interior of the air compressor through the first connector, the low-temperature airflow flows through the gaps between the various parts, thereby cooling the thrust bearings, radial bearings, air compressor rotor, and air compressor stator core inside the air compressor, and finally being discharged to the outside of the air compressor through the second connector.

[0034] Optionally, the air cooling system 2 also includes a return pipe 22, one end of which is connected to the second connecting piece, and the other end is connected to the compression end of the air compressor. After cooling, the air flow inside the air compressor enters the return pipe 22 through the second connecting piece, and finally enters the compression end of the air compressor. The air cooling system 2 obtains high-pressure and high-temperature airflow from the compression end of the air compressor. After the high-pressure and high-temperature airflow is cooled by the water tank 11, it becomes a high-pressure and low-temperature airflow. After the high-pressure and low-temperature airflow enters the interior of the air compressor through the first connecting piece, it flows in the gaps between the various parts inside the air compressor, cooling the various components inside the air compressor to prevent the parts from overheating. The cooled airflow enters the return pipe 22 from the second connecting piece, and finally re-enters the compression end of the air compressor and recirculates.

[0035] Optionally, the water tank 11 is provided with a water inlet 12 and a water outlet 13. The water cooling system also includes a water pool and a circulation pipe. The circulation pipe is divided into two sections: one section connects the water inlet 12 of the water tank 11 to the water pool, and the other section connects the water pool to the water tank 11 outlet 13. A circulation pump is provided on the circulation pipe. The circulation pump feeds liquid from the water tank 11 through the outlet 13 into the circulation pipe and into the water pool. Simultaneously, the liquid from the water pool is fed into the water tank 11 through the circulation pipe and the water inlet 12.

[0036] Example 2

[0037] The cooling device provided in this embodiment includes a liquid cooling system 1 and an air cooling system 2, both located within the air compressor. The liquid cooling system 1 is used to cool the compressor's main body. The liquid cooling system 1 is in direct contact with the compressor's main body, cooling the compressor's main body and motor through heat exchange. The air cooling system 2 includes an air supply duct 21 located within the liquid cooling system 1. The air supply duct 21 provides low-temperature airflow to the interior of the compressor, thereby cooling the compressor's interior.

[0038] Compared with the prior art, the air compressor provided by the present invention has a liquid cooling system 1 in contact with the air supply duct 21. Through heat exchange between the two, the liquid cooling system 1 reduces the temperature of the air flow in the air supply duct 21, thereby enabling the air cooling system 2 to provide low-temperature airflow for the components inside the air compressor, so as to cool the inside of the air compressor. When the air compressor is working, the cooling device cools the surface of the air compressor through the water cooling system and cools the internal components of the air compressor through the air cooling system 2. Through the cooperation of the water cooling system and the air cooling system 2, the air compressor can be cooled to the greatest extent, avoiding overheating of the internal components of the air compressor. The cooling device provided by the present invention cools the air cooling system 2 through the water cooling system, and there is no need to set a cold source for the air cooling system 2, and cools the inside of the air compressor.

[0039] Optionally, the liquid cooling system 1 includes a cylindrical water tank 11 wrapped around the outside of the air compressor, and an air supply duct 21 is provided at the water tank 11. The water tank 11 is filled with a low-temperature liquid, and the air supply duct 21 is in direct contact with the water tank 11. The low-temperature liquid inside the water tank 11 absorbs heat from the air supply duct 21, thereby reducing the temperature of the air flow inside the air supply duct 21.

[0040] Optionally, the air supply duct 21 is coiled outside the water tank 11. The air supply duct 21 contacts the water tank 11 in a coiled manner to increase the contact area between the air supply duct 21 and the water tank 11, so as to improve the efficiency of the water tank 11 in cooling the air supply duct 21.

[0041] Optionally, a spiral mounting groove 14 is formed on the outer wall of the water tank 11, into which the air supply duct 21 is secured. Mounting groove 14 secures the position of the air supply duct 21, preventing it from falling off or shifting due to vibration during operation of the air compressor, thereby improving the stability of the air cooling system 2. Mounting groove 14 also increases the contact area between the air supply duct 21 and the water tank 11, further improving the efficiency of the water tank 11 in cooling the air supply duct 21.

[0042] Optionally, the air inlet of the air supply duct 21 is connected to the turbine end of the air compressor, and the air outlet is connected to the interior of the air compressor. The turbine end of the air compressor is a high-temperature and high-pressure area. Under the action of high pressure, the air at the turbine end of the air compressor enters the air supply duct 21 from the air inlet of the air supply duct 21. When passing through the water tank 11, the temperature is reduced, and the high-temperature airflow in the air supply duct 21 becomes low-temperature airflow.

[0043] A first connector is provided on the air compressor housing, and an air supply duct 21 is connected to the first connector. The air supply duct 21 is the same as the interior of the air compressor through the first connector. The low-temperature airflow in the air supply duct 21 enters the interior space of the air compressor through the first connector. A second connector is provided on the air compressor housing, and the second connector and the first connector are respectively arranged at both ends of the air compressor. After entering the interior of the air compressor through the first connector, the low-temperature airflow flows through the gaps between the various parts, thereby cooling the thrust bearings, radial bearings, air compressor rotor, and air compressor stator core inside the air compressor, and finally being discharged to the outside of the air compressor through the second connector.

[0044] Optionally, the air cooling system 2 also includes a return pipe 22, one end of which is connected to the second connecting piece, and the other end is connected to the compression end of the air compressor. After cooling, the air flow inside the air compressor enters the return pipe 22 through the second connecting piece, and finally enters the compression end of the air compressor. The air cooling system 2 obtains high-pressure and high-temperature airflow from the compression end of the air compressor. After the high-pressure and high-temperature airflow is cooled by the water tank 11, it becomes a high-pressure and low-temperature airflow. After the high-pressure and low-temperature airflow enters the interior of the air compressor through the first connecting piece, it flows in the gaps between the various parts inside the air compressor, cooling the various components inside the air compressor to prevent the parts from overheating. The cooled airflow enters the return pipe 22 from the second connecting piece, and finally re-enters the compression end of the air compressor and recirculates.

[0045] Optionally, the water tank 11 is provided with a water inlet 12 and a water outlet 13. The water cooling system also includes a water pool and a circulation pipe. The circulation pipe is divided into two sections: one section connects the water inlet 12 of the water tank 11 to the water pool, and the other section connects the water pool to the water tank 11 outlet 13. A circulation pump is provided on the circulation pipe. The circulation pump feeds liquid from the water tank 11 through the outlet 13 into the circulation pipe and into the water pool. Simultaneously, the liquid from the water pool is fed into the water tank 11 through the circulation pipe and the water inlet 12.

[0046] Example 3

[0047] The cooling device provided in this embodiment includes a liquid cooling system 1 and an air cooling system 2, both located within the air compressor. The liquid cooling system 1 is used to cool the compressor's main body. It is in direct contact with the compressor's outer casing, cooling the compressor's main body and motor through heat exchange. The air cooling system 2 includes an air supply duct 21 located within the liquid cooling system 1. The air supply duct 21 provides low-temperature airflow to the interior of the compressor, thereby cooling the compressor.

[0048] Compared with the prior art, the air compressor provided by the present invention has a liquid cooling system 1 in contact with the air supply duct 21. Through heat exchange between the two, the liquid cooling system 1 reduces the temperature of the air flow in the air supply duct 21, thereby enabling the air cooling system 2 to provide low-temperature airflow for the components inside the air compressor, so as to cool the inside of the air compressor. When the air compressor is working, the cooling device cools the surface of the air compressor through the water cooling system and cools the internal components of the air compressor through the air cooling system 2. Through the cooperation of the water cooling system and the air cooling system 2, the air compressor can be cooled to the greatest extent, avoiding overheating of the internal components of the air compressor. The cooling device provided by the present invention cools the air cooling system 2 through the water cooling system, and there is no need to set a cold source for the air cooling system 2 to cool the inside of the air compressor.

[0049] Optionally, the liquid cooling system 1 includes a water tank 11 wrapped around the outside of the air compressor and a water-cooling pipe 15 coiled inside the air compressor. The water tank 11 supplies water to the water-cooling pipe 15. The water tank 11 is cylindrical and filled with low-temperature liquid. The water-cooling pipe 15 contacts the air compressor body and motor, cooling them.

[0050] Optionally, the air supply duct 21 is provided inside the water tank 11. The air supply duct 21 is wound around the air compressor inside the water tank 11. The air supply duct 21 is immersed in the liquid in the water tank 11. When the air flows in the air supply duct 21,

[0051] Optionally, the air inlet of the air supply duct 21 is connected to the turbine end of the air compressor, and the air outlet is connected to the interior of the air compressor. The turbine end of the air compressor is a high-temperature and high-pressure area. Under the action of high pressure, the air at the turbine end of the air compressor enters the air supply duct 21 from the air inlet of the air supply duct 21. When the airflow passes through the water tank 11, it is cooled and heat exchanged with the water in the water tank 11, thereby turning into low-temperature airflow.

[0052] A first connector is provided on the air compressor housing, and an air supply duct 21 is connected to the first connector. The air supply duct 21 is the same as the interior of the air compressor through the first connector. The low-temperature airflow in the air supply duct 21 enters the interior space of the air compressor through the first connector. A second connector is provided on the air compressor housing, and the second connector and the first connector are respectively arranged at both ends of the air compressor. After entering the interior of the air compressor through the first connector, the low-temperature airflow flows through the gaps between the various parts, thereby cooling the thrust bearings, radial bearings, air compressor rotor, and air compressor stator core inside the air compressor, and finally being discharged to the outside of the air compressor through the second connector.

[0053] Optionally, the air cooling system 2 also includes a return pipe 22, one end of which is connected to the second connecting piece, and the other end is connected to the compression end of the air compressor. After cooling, the air flow inside the air compressor enters the return pipe 22 through the second connecting piece, and finally enters the compression end of the air compressor. The air cooling system 2 obtains high-pressure and high-temperature airflow from the compression end of the air compressor. After the high-pressure and high-temperature airflow is cooled by the water tank 11, it becomes a high-pressure and low-temperature airflow. After the high-pressure and low-temperature airflow enters the interior of the air compressor through the first connecting piece, it flows in the gaps between the various parts inside the air compressor, cooling the various components inside the air compressor to prevent the parts from overheating. The cooled airflow enters the return pipe 22 from the second connecting piece, and finally re-enters the compression end of the air compressor and recirculates.

[0054] Optionally, the water tank 11 is provided with a water inlet 12 and a water outlet 13. The water cooling system also includes a water pool and a circulation pipe. The circulation pipe is divided into two sections: one section connects the water inlet 12 of the water tank 11 to the water pool, and the other section connects the water pool to the water tank 11 outlet 13. A circulation pump is provided on the circulation pipe. The circulation pump feeds liquid from the water tank 11 through the outlet 13 into the circulation pipe and into the water pool. Simultaneously, the liquid from the water pool is fed into the water tank 11 through the circulation pipe and the water inlet 12.

[0055] In a second aspect, the present invention provides an air compressor comprising the cooling device as described in the first aspect.

[0056] A first connector is provided on the air compressor housing, and an air supply duct is connected to the first connector. The air supply duct is connected to the interior of the air compressor through the first connector. The low-temperature airflow in the air supply duct enters the interior of the air compressor through the first connector. A second connector is provided on the air compressor housing, and the second connector and the first connector are respectively arranged at opposite ends of the air compressor. After entering the air compressor through the first connector, the low-temperature airflow flows through the gaps between various components, thereby cooling components such as the thrust bearing, radial bearing, compressor rotor, and stator core, and is ultimately discharged to the exterior of the air compressor through the second connector.

[0057] The air cooling system also includes a return pipe, one end of which is connected to the second connecting piece, and the other end is connected to the compression end of the air compressor. After cooling, the airflow inside the air compressor enters the return pipe through the second connecting piece, and finally enters the compression end of the air compressor. The air cooling system obtains high-pressure and high-temperature airflow from the compression end of the air compressor. After the high-pressure and high-temperature airflow is cooled by the water tank, it becomes high-pressure and low-temperature airflow. After the high-pressure and low-temperature airflow enters the interior of the air compressor through the first connecting piece, it flows in the gaps between the various parts inside the air compressor, cooling the various components inside the air compressor to prevent the parts from overheating. The cooled airflow enters the return pipe from the second connecting piece, and finally re-enters the compression end of the air compressor and recirculates.

[0058] The air compressor provided in this embodiment also includes an air intake duct and a flow guide system disposed in the air intake duct. The flow guide system includes a drive mechanism, an adjustment mechanism, and guide vanes disposed in the air intake duct. The adjustment mechanism is sleeved on the air intake duct, and the guide vanes are rotatably connected to the wall of the air intake duct. The adjustment mechanism is disposed between the drive mechanism and the guide vanes and is connected to both. The drive mechanism is used to drive the adjustment mechanism to rotate, and the adjustment mechanism, when rotating, drives the guide vanes to rotate.

[0059] Compared with the prior art, the air compressor provided by the present invention has a flow guide system arranged on the air intake duct that adjusts the flow direction of the air intake airflow of the air compressor during operation, thereby reducing the turbulence in the air intake airflow of the air compressor, and further reducing the negative impact of the turbulence on the air compressor. When adjusting the flow direction of the intake airflow, the driving mechanism drives the regulating mechanism to rotate, and the regulating mechanism drives the guide vanes to rotate when rotating. The flow guide system adjusts the size and direction of the recent airflow by adjusting the angle of the guide vanes, thereby reducing the turbulence in the airflow. At the same time, when the flow guide system adjusts the angle of the guide vanes, the surge line of the air compressor moves to the left. Therefore, under normal working conditions, the guide vanes are fully open and consistent with the direction of the airflow. When the working conditions are close to the surge zone or in the surge zone, the guide vane rotation angle is adjusted by the flow guide system to close the air inlet, reduce the intake flow, and move the surge line to the left to meet the working conditions.

[0060] The adjustment mechanism includes an adjustment ring mounted on the air intake duct and an adjustment member. The adjustment ring is connected to a drive mechanism. The drive mechanism can drive the adjustment member to rotate around the outer wall of the air intake duct. The adjustment member is slidably connected to the adjustment ring.

[0061] A guide member with a slot is provided on the side of the adjustment ring. A cylindrical slider is located at the end of the adjustment member. The slider is seated in the slot. The adjustment member is connected to the guide member through the engagement of the slider and the slot. When the drive mechanism rotates the adjustment ring, the adjustment ring drives the adjustment member to rotate. Relative sliding and rotation occur simultaneously between the adjustment member and the adjustment ring.

[0062] The guide vane is provided with a rotating shaft, and a mounting hole is opened on the wall of the air intake duct. The rotating shaft is installed in the mounting hole and can rotate in the mounting hole. One end of the rotating shaft passes through the mounting hole and is exposed to the outside of the air intake duct. The adjusting member is fixedly connected to the rotating shaft.

[0063] Multiple guide vanes are provided, each in a fan-shaped configuration. The rotating shaft is positioned at the center of the curved surface of the guide vane. After the guide vanes are installed, their tips align with the center of the intake duct. All the guide vanes form a disc.

[0064] The number of the chute and the adjusting members is the same as the number of the guide vanes. When the driving mechanism drives the adjusting ring to rotate, the adjusting ring drives the guide vanes to rotate synchronously through the adjusting members.

[0065] The drive mechanism includes an actuator connected to the air intake duct and a connector. A mounting base is provided on the wall of the near-inlet duct, and the base of the actuator is mounted on the mounting base. One end of the connector is hinged to the output end of the actuator, and the other end is hinged to the adjustment ring.

[0066] When the actuator is operating, it drives the output end to oscillate. As the output point of the actuator oscillates, the connector moves with it, simultaneously driving the adjustment ring to rotate. Rotation of the adjustment ring drives the shafts of the guide vanes synchronously through the various adjustment members, thereby adjusting the guide vane angles synchronously.

[0067] A rocker is connected to the output end of the actuator, a free end of the rocker is connected to one end of a connecting piece, and the other end of the connecting piece is hinged to the adjusting ring.

[0068] Electronic actuators are an essential component of automation systems. Their primary function is to receive control signals from the controller and change the size of the controlled medium, thereby maintaining the controlled variable at the desired value or within a certain range. Electronic actuators can be divided into three categories based on their energy source: pneumatic, hydraulic, and electric. In automation systems, electronic actuators are responsible for converting control signals into actual actions. Depending on the signal type, electronic actuators can be divided into two types: digital actuators and analog actuators. Digital actuators are primarily used to control systems with only two states, such as open or closed, while analog actuators can receive and respond to continuously changing signals, such as 4-20mA current signals, to precisely control the actuator's opening and implement complex functions such as PID control.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cooling device, characterized in that: include: A liquid cooling system (1) is provided inside the air compressor and is used to cool the main body and motor of the air compressor; and The air cooling system (2) comprises an air supply duct (21) arranged at the liquid cooling system (1), wherein the air supply duct (21) provides low-temperature airflow to the interior of the air compressor so as to cool the interior of the air compressor.

2. The cooling device according to claim 1, wherein The liquid cooling system (1) comprises a water tank (11) covering the outside of the air compressor and a water cooling pipe (15) coiled inside the air compressor, wherein the water tank (11) supplies water to the water cooling pipe (15).

3. The cooling device according to claim 2, wherein: The air supply duct (21) is coiled inside the air compressor, and the air supply duct (21) is arranged in the gap of the water cooling duct (15).

4. The cooling device according to claim 2, wherein: An installation groove (14) is provided on the outside of the water tank (11), and the air supply duct (21) is arranged in the installation groove (14).

5. The cooling device according to claim 2, wherein: The air supply pipe (21) is arranged inside the water tank (11).

6. The cooling device according to any one of claims 1 to 5, characterized in that: The air inlet of the air supply duct (21) is connected to the turbine end of the air compressor, and the air outlet of the air supply duct (21) is connected to the inside of the air compressor.

7. The cooling device according to claim 6, wherein: The air cooling system (2) further comprises a return pipe (22), one end of which is connected to the interior of the air compressor, and the other end of which is connected to the compression end of the air compressor.

8. The cooling device according to claim 2, wherein: The water tank (11) is provided with a water inlet (12) and a water outlet (13).

9. The cooling device according to claim 8, wherein: The drain port (13) and the water inlet (12) are both arranged at the top.

10. Air compressor, characterized in that, Comprising the cooling device according to any one of claims 1 to 9.

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