Cooling device and air compressor

Abstract

The invention 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 overheating of the internal parts of the air compressor is avoided. 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 invention 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 storages. When the air compressor is working, it will generate high temperatures. When the air compressor is working, it is necessary to configure a cooling system for the air compressor to prevent the air compressor from overheating. In the prior art, water cooling is usually used, and a cooling water tank is set outside the air compressor. The prior art has the following defects: the water cooling method can only cool the outside of the air compressor, and cannot effectively cool the parts inside the air compressor. Summary of the invention

[0003] The object of the present invention 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] To achieve the above object, 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, arranged inside the air compressor, for cooling the main body and the motor of the air compressor; and

[0007] The air cooling system comprises an air supply duct arranged at the liquid cooling system, wherein the air supply duct provides low-temperature airflow 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 of the water cooling duct.

[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 inside 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 water 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 beneficial effect of the air compressor provided by the present invention is that compared with the prior art, when the air compressor is working, the cooling device provided by the present invention 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. Through the cooperation of the water cooling system and the air cooling system, the air compressor can be cooled to the greatest extent to avoid overheating of the internal components of the air compressor. The cooling device provided by the present invention cools the air cooling system through the water cooling system, and there is no need to set a cold source for the air cooling system, and cools the inside 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

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

[0020] Figure 2 A schematic diagram of the structure of a water cooling pipeline and an air supply pipeline provided in Example 1 of the present invention;

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

[0022] Description of reference numerals:

[0023] 1. Liquid cooling system; 11. Water tank; 12. Water inlet; 13. Drain outlet; 14. Installation 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 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.

[0025] Reference Figure 1 and Figure 2 , the cooling device and air compressor provided by the present invention are now described.

[0026] In a first aspect, the present invention 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 arranged inside the air compressor. The liquid cooling system 1 is used to cool the main body of the air compressor. The liquid cooling system 1 is in direct contact with the outer shell of the air compressor, and cools the main body of the air compressor and the motor by heat exchange. The air cooling system 2 includes an air supply duct 21 arranged at the liquid cooling system 1. The air supply duct 21 provides a low-temperature airflow to the interior of the air compressor so as to cool the interior of the air compressor.

[0029] Compared with the prior art, the air compressor provided by the present invention has a liquid cooling system 1 in contact with an air supply duct 21. Through heat exchange between the two, the liquid cooling system 1 reduces the temperature of the airflow in the air supply duct 21, so that the air cooling system 2 can 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 to avoid 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.

[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 the inside of the water tank 11 is filled with low-temperature liquid. The water cooling pipe 15 is in contact with the air compressor body and the motor to cool the air compressor body and the motor.

[0031] Optionally, the air supply duct 21 is coiled inside the air compressor. A gap is provided between the air supply duct 21 and the adjacent ramps of the water cooling duct 15, and the air supply duct 21 is arranged in the gap of the water cooling duct 15. The water cooling duct 15 cools down the air compressor body and the motor while also cooling down the air supply duct 21. After the airflow in the air supply duct 21 is cooled down, it is sent into the gap of the internal structure of the air compressor.

[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 inside 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, and is cooled when the airflow passes through the water tank 11, and heat is exchanged with the water in the water tank 11, thereby becoming a low-temperature airflow.

[0033] A first connecting piece is provided on the outer shell of the air compressor, and an air supply duct 21 is connected to the first connecting piece. The air supply duct 21 is the same as the inside of the air compressor through the first connecting piece. The low-temperature airflow in the air supply duct 21 enters the internal space of the air compressor through the first connecting piece. A second connecting piece is provided on the outer shell of the air compressor, and the second connecting piece and the first connecting piece are respectively arranged at both ends of the air compressor. After the low-temperature airflow enters the interior of the air compressor through the first connecting piece, it flows in the gaps between the various parts, thereby cooling down the thrust bearing, radial bearing, air compressor rotor, air compressor stator core and other components inside the air compressor, and finally being discharged from the second connecting piece to the outside of the air compressor.

[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 airflow 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 air compressor through the first connecting piece, it flows in the gaps between the various parts inside the air compressor, cools the various components inside the air compressor, and prevents 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 to circulate again.

[0035] Optionally, a water inlet 12 and a drain 13 are provided on the water tank 11. The water cooling system also includes a water pool and a circulation pipe. The circulation pipe is divided into two sections, one section of the circulation pipe connects the water inlet 12 of the water tank 11 with the water pool, and the other section of the circulation pipe connects the water pool and the drain 13 of the water tank 11. A circulation pump is provided on the circulation pipe. The circulation pump sends the liquid in the water tank 11 from the drain 13 into the circulation pipe and into the water pool, and at the same time sends the liquid in the water pool 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 arranged inside the air compressor. The liquid cooling system 1 is used to cool the main body of the air compressor. The liquid cooling system 1 is in direct contact with the main body of the air compressor and cools the main body of the air compressor and the motor by heat exchange. The air cooling system 2 includes an air supply duct 21 arranged at the liquid cooling system 1. The air supply duct 21 provides a low-temperature airflow to the interior of the air compressor so as to cool the interior of the air compressor.

[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 airflow in the air supply duct 21, so that the air cooling system 2 can 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 to avoid 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 water tank 11 wrapped around the outside of the air compressor, the water tank 11 is cylindrical, and the air supply duct 21 is arranged at the water tank 11. The inside of the water tank 11 is filled with low-temperature liquid, the air supply duct 21 is in direct contact with the water tank 11, and the low-temperature liquid inside the water tank 11 absorbs the heat of 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 cooling the air supply duct 21.

[0041] Optionally, a spiral mounting groove 14 is provided on the outer wall of the water tank 11, and the air supply duct 21 is fixed in the mounting groove 14. The mounting groove 14 can fix the position of the air supply duct 21, and can prevent the air supply duct 21 from falling off and displacement due to vibration when the air compressor is working, thereby improving the stability of the air cooling system 2. At the same time, the mounting groove 14 further 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 inside 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, and is cooled when passing through the water tank 11, and the high-temperature airflow in the air supply duct 21 becomes a low-temperature airflow.

[0043] A first connecting piece is provided on the outer shell of the air compressor, and an air supply duct 21 is connected to the first connecting piece. The air supply duct 21 is the same as the inside of the air compressor through the first connecting piece. The low-temperature airflow in the air supply duct 21 enters the internal space of the air compressor through the first connecting piece. A second connecting piece is provided on the outer shell of the air compressor, and the second connecting piece and the first connecting piece are respectively arranged at both ends of the air compressor. After the low-temperature airflow enters the interior of the air compressor through the first connecting piece, it flows in the gaps between the various parts, thereby cooling down the thrust bearing, radial bearing, air compressor rotor, air compressor stator core and other components inside the air compressor, and finally being discharged from the second connecting piece to the outside of the air compressor.

[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 airflow 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 air compressor through the first connecting piece, it flows in the gaps between the various parts inside the air compressor, cools the various components inside the air compressor, and prevents 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 to circulate again.

[0045] Optionally, a water inlet 12 and a drain 13 are provided on the water tank 11. The water cooling system also includes a water pool and a circulation pipe. The circulation pipe is divided into two sections, one section of the circulation pipe connects the water inlet 12 of the water tank 11 with the water pool, and the other section of the circulation pipe connects the water pool and the drain 13 of the water tank 11. A circulation pump is provided on the circulation pipe. The circulation pump sends the liquid in the water tank 11 from the drain 13 into the circulation pipe and into the water pool, and at the same time sends the liquid in the water pool 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 arranged inside the air compressor. The liquid cooling system 1 is used to cool the main body of the air compressor. The liquid cooling system 1 is in direct contact with the outer shell of the air compressor, and cools the main body of the air compressor and the motor by heat exchange. The air cooling system 2 includes an air supply duct 21 arranged at the liquid cooling system 1. The air supply duct 21 provides a low-temperature airflow to the interior of the air compressor so as to cool the interior of the air compressor.

[0048] Compared with the prior art, the air compressor provided by the present invention has a liquid cooling system 1 in contact with an air supply duct 21. Through heat exchange between the two, the liquid cooling system 1 reduces the temperature of the airflow in the air supply duct 21, so that the air cooling system 2 can 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 to avoid 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.

[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 the inside of the water tank 11 is filled with low-temperature liquid. The water cooling pipe 15 is in contact with the air compressor body and the motor to cool the air compressor body and the motor.

[0050] Optionally, the air supply duct 21 is arranged inside the water tank 11. The air supply duct 21 is coiled 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 inside 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, and is cooled when the airflow passes through the water tank 11, and heat is exchanged with the water in the water tank 11, thereby becoming a low-temperature airflow.

[0052] A first connecting piece is provided on the outer shell of the air compressor, and an air supply duct 21 is connected to the first connecting piece. The air supply duct 21 is the same as the inside of the air compressor through the first connecting piece. The low-temperature airflow in the air supply duct 21 enters the internal space of the air compressor through the first connecting piece. A second connecting piece is provided on the outer shell of the air compressor, and the second connecting piece and the first connecting piece are respectively arranged at both ends of the air compressor. After the low-temperature airflow enters the interior of the air compressor through the first connecting piece, it flows in the gaps between the various parts, thereby cooling down the thrust bearing, radial bearing, air compressor rotor, air compressor stator core and other components inside the air compressor, and finally being discharged from the second connecting piece to the outside of the air compressor.

[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 airflow 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 air compressor through the first connecting piece, it flows in the gaps between the various parts inside the air compressor, cools the various components inside the air compressor, and prevents 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 to circulate again.

[0054] Optionally, a water inlet 12 and a drain 13 are provided on the water tank 11. The water cooling system also includes a water pool and a circulation pipe. The circulation pipe is divided into two sections, one section of the circulation pipe connects the water inlet 12 of the water tank 11 with the water pool, and the other section of the circulation pipe connects the water pool and the drain 13 of the water tank 11. A circulation pump is provided on the circulation pipe. The circulation pump sends the liquid in the water tank 11 from the drain 13 into the circulation pipe and into the water pool, and at the same time sends the liquid in the water pool 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 connecting piece is provided on the outer shell of the air compressor, and the air supply duct is connected to the first connecting piece. The air supply duct is the same as the inside of the air compressor through the first connecting piece. The low-temperature airflow in the air supply duct enters the internal space of the air compressor through the first connecting piece. A second connecting piece is provided on the outer shell of the air compressor, and the second connecting piece and the first connecting piece are respectively arranged at both ends of the air compressor. After the low-temperature airflow enters the inside of the air compressor through the first connecting piece, it flows in the gaps between the various parts, thereby cooling down the thrust bearing, radial bearing, air compressor rotor, air compressor stator core and other components inside the air compressor, and finally discharged from the second connecting piece to the outside of the air compressor.

[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 a high-pressure and low-temperature airflow. After the high-pressure and low-temperature airflow enters the air compressor through the first connecting piece, it flows in the gaps between the various parts inside the air compressor, cools the various components inside the air compressor, and prevents 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 to circulate again.

[0058] The air compressor provided in this embodiment also includes an air intake duct and a guide system arranged at the air intake duct. The guide system includes a driving mechanism, an adjusting mechanism and a guide vane arranged on the air intake duct. The adjusting mechanism is sleeved on the air intake duct, and the guide vane is rotatably connected to the wall of the air intake duct. The adjusting member mechanism is arranged between the driving mechanism and the guide vane, and is respectively connected to the two. The driving mechanism is used to drive the adjusting mechanism to rotate, and the adjusting mechanism drives the guide vane to rotate when rotating.

[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 to adjust 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 air intake airflow, the driving mechanism drives the adjusting mechanism to rotate, and the adjusting mechanism drives the guide vanes to rotate when rotating. The flow guide system adjusts the size and flow 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 opened and consistent with the direction of the airflow. When the working condition is 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 condition.

[0060] The regulating mechanism comprises an regulating ring sleeved on the air intake pipe and a regulating member. The regulating ring is connected to a driving mechanism. The driving mechanism can drive the regulating member to rotate around the outer peripheral wall of the air intake pipe. The regulating member is slidably connected to the regulating ring.

[0061] A guide is provided on the side of the adjusting ring, and a slide groove is provided on the guide. A cylindrical slider is provided at the end of the adjusting member. The slider is set in the slide groove. The adjusting member is connected to the guide member through the cooperation between the slider and the slide groove. When the driving mechanism drives the adjusting ring to rotate, the adjusting ring drives the adjusting member to rotate. Relative sliding and relative rotation occur simultaneously between the adjusting member and the adjusting ring.

[0062] The guide vane is provided with a rotating shaft, and a mounting hole is opened on the pipe wall of the air intake pipe. 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 outside the air intake pipe, and the adjusting member is fixedly connected to the rotating shaft.

[0063] There are multiple guide vanes, and the shape of the guide vanes is fan-shaped. The rotating shaft is set at the center of the arc surface of the guide vane. After the guide vane is installed, the tip of the guide vane coincides with the center of the air intake duct. All the guide vanes can form a disc.

[0064] The number of the slide slots and the adjusting pieces 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 pieces.

[0065] The driving mechanism includes an actuator connected to the air intake pipe and a connecting piece. A mounting seat is provided on the pipe wall of the recent pipe, and the base of the actuator is mounted on the mounting seat. One end of the connecting piece is hinged to the output end of the actuator, and the other end is hinged to the adjusting ring.

[0066] When the actuator is working, it drives the output end to swing. When the output point of the actuator swings, the connecting piece moves with the output end of the actuator and drives the adjustment ring to rotate at the same time. When the adjustment ring rotates, the shafts of each guide vane are synchronously driven to rotate through each adjustment piece, thereby synchronously adjusting the angle of the guide vane.

[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 an adjusting ring.

[0068] The electric actuator is an indispensable and important part of the automation system. Its main function is to receive the control signal sent by the controller, change the size of the controlled medium, and thus maintain the controlled variable at the required value or within a certain range. Electric actuators can be divided into three categories according to their energy form: pneumatic, hydraulic, and electric. In the automation system, the electric actuator is responsible for converting the control signal into actual action. According to the different signal types, the electric actuator can be divided into two types: switch actuator and analog actuator. Switch actuator is mainly used to control systems with only two states, such as open or closed, while analog actuator can receive and respond to continuously changing signals, such as 4-20mA current signals, so as to accurately control the opening of the actuator and realize 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 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. A cooling device, characterized in that: include: A liquid cooling system (1) is arranged 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, characterized in that 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, and the water tank (11) supplies water to the water cooling pipe (15).

3. The cooling device according to claim 2, characterized in that: 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, characterized in that: The water tank (11) is provided with a mounting groove (14) on the outside, and the air supply duct (21) is arranged in the mounting groove (14).

5. The cooling device according to claim 2, characterized in that: The air supply duct (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, characterized in that 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, characterized in that: The water tank (11) is provided with a water inlet (12) and a water outlet (13).

9. The cooling device according to claim 8, characterized in that The water outlet (13) and the water inlet (12) are both arranged at the top.

10. An air compressor, characterized in that: Comprising a cooling device as claimed in any one of claims 1 to 9.

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