Cooling device and method based on refrigerant and application of cooling device and method

Abstract

The invention provides a cooling device and method based on refrigerants and application of the cooling device and method, and particularly relates to the technical field of cooling of new energy automobile charging piles, and the cooling device comprises a compressor, a condenser, a throttling valve, a cooling pipe and a controller. The device compresses a gaseous refrigerant into a high-temperature and high-pressure state through the compressor, then feeds the gaseous refrigerant into the condenser for heat dissipation and cooling into a high-pressure liquid state, and then depressurizes into a low-temperature and low-pressure mist state through the throttling valve The cooling pipe is arranged in the charging gun line and is in direct contact with the surface of the conductor, so that the low-temperature and low-pressure vaporific refrigerant absorbs heat and is vaporized, and the charging gun line is cooled. The controller adjusts the rotating speed of the compressor and the opening degree of the throttling valve according to the temperature of the conductor in the charging gun line, and refrigerant circulation closed-loop operation is maintained. The device effectively solves the problem of low heat dissipation efficiency of the gun line of the charging pile in the high-power charging process, remarkably improves the heat dissipation efficiency, and ensures that the high-power charging pile works in a safe and stable state.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation and cooling of new energy vehicle charging piles, and in particular to a refrigerant-based heat dissipation and cooling device, method and application thereof. Background Art

[0002] With the rapid development of the new energy vehicle industry, charging piles, as important supporting facilities for electric vehicles, are receiving increasing attention for their performance and efficiency. Especially in high-power charging scenarios, the heat dissipation problem of charging pile gun wires has become a key factor restricting charging efficiency and safety. At present, charging pile gun wires on the market generally face the problem of temperature rise caused by poor heat dissipation during use, which not only affects the charging efficiency, but also may cause safety hazards, becoming a bottleneck restricting the development of the industry.

[0003] In order to solve the heat dissipation problem of the charging pile gun line, the traditional technology uses a liquid-cooled cooling module. The liquid-cooled cooling module uses circulating liquid to take away the heat generated by the gun line during operation, thereby achieving a heat dissipation effect. However, although the liquid-cooled cooling module has alleviated the heat dissipation problem to a certain extent, its heat dissipation efficiency is still limited. In particular, at the same size, the heat dissipation power that can be achieved by the liquid-cooled cooling module is relatively low, which is difficult to meet the high requirements of high-power charging piles for heat dissipation performance. In addition, the liquid-cooled cooling module also has problems such as complex structure and high maintenance cost, which further limits its promotion in practical applications.

[0004] To sum up, how to solve the technical problem that the charging pile gun line has low heat dissipation efficiency during high-power charging and is difficult to meet the requirements of safe and stable operation is an urgent problem to be solved. Summary of the invention

[0005] The main purpose of the present invention is to provide a refrigerant-based heat dissipation cooling device, method and application thereof, so as to solve the technical problem that the heat dissipation efficiency of the charging pile gun line is low during high-power charging and it is difficult to meet the requirements of safe and stable operation, thereby significantly improving the heat dissipation efficiency of the charging pile gun line and ensuring that the high-power charging pile operates in a safe and stable state.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a refrigerant-based heat dissipation cooling device, method and application thereof.

[0007] In a first aspect, the present invention provides a refrigerant-based heat dissipation cooling device, the device comprising:

[0008] A compressor, a condenser, a throttle valve, a cooling pipe and a controller, wherein the outlet of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the throttle valve, the outlet of the throttle valve is connected to the inlet of the cooling pipe, and the outlet of the cooling pipe is connected to the inlet of the compressor to form a closed circulation loop;

[0009] The cooling tube is built into the charging gun wire and is in direct contact with the conductor surface inside the charging gun wire;

[0010] The controller is electrically connected to the compressor and the throttle valve respectively;

[0011] Among them, the compressor is used to compress the gaseous refrigerant into a high-temperature and high-pressure refrigerant and transport it to the condenser; the condenser is used to dissipate the heat and cool the high-temperature and high-pressure refrigerant into a high-pressure liquid refrigerant; the throttle valve is used to reduce the pressure of the high-pressure liquid refrigerant into a low-temperature and low-pressure mist refrigerant; the cooling pipe is used to make the low-temperature and low-pressure mist refrigerant absorb the heat of the conductor inside the charging gun line and vaporize into a gas to cool the charging gun line; the controller is used to adjust the speed of the compressor and the opening of the throttle valve according to the temperature of the conductor inside the charging gun line to maintain the closed-loop operation of the refrigerant circulation.

[0012] Furthermore, the cooling tube is spirally wound on the surface of the conductor inside the charging gun wire, and the spiral pitch of the cooling tube is 1.2-1.5 times the diameter of the conductor.

[0013] Furthermore, the inner diameter of the inlet section of the cooling pipe is 2.3-2.5 mm, and the inner diameter of the outlet section of the cooling pipe is 3.0-3.2 mm, wherein the inlet section of the cooling pipe is used to indicate the pipe section extending 50-80 mm from the outlet end of the throttle valve, and the outlet section of the cooling pipe is used to indicate the pipe section 50-80 mm away from the inlet end of the compressor.

[0014] Furthermore, the condenser comprises multiple layers of heat dissipation fins arranged in parallel, and the distance between adjacent heat dissipation fins is 0.8-1.0 mm.

[0015] In a second aspect, the present invention provides a refrigerant-based heat dissipation cooling method, characterized in that the method is applied to the device described in the first aspect, and the method comprises:

[0016] The compressor compresses the gaseous refrigerant into a high-temperature and high-pressure refrigerant and delivers it to the condenser;

[0017] The refrigerant in the high temperature and high pressure state is cooled down by the condenser to become a high pressure liquid refrigerant;

[0018] The high-pressure liquid refrigerant is reduced in pressure to a low-temperature and low-pressure mist refrigerant through the throttle valve;

[0019] The low-temperature and low-pressure mist-like refrigerant absorbs the conductor heat inside the charging gun wire through the cooling pipe and vaporizes into a gas state to cool the charging gun wire;

[0020] The controller adjusts the speed of the compressor and the opening of the throttle valve according to the conductor temperature inside the charging gun line to maintain the closed-loop operation of the refrigerant circulation.

[0021] Further, the controller adjusts the speed of the compressor and the opening of the throttle valve according to the conductor temperature inside the charging gun line, including:

[0022] When the conductor temperature inside the charging gun line is greater than a set threshold, the speed of the compressor and the opening of the throttle valve are increased synchronously;

[0023] When the conductor temperature inside the charging gun line is lower than a set threshold, the speed of the compressor and the opening of the throttle valve are synchronously reduced;

[0024] When the conductor temperature inside the charging gun line is equal to the set threshold, the rotation speed of the compressor and the opening of the throttle valve are kept unchanged.

[0025] In a third aspect, the present invention provides an application of the refrigerant-based heat dissipation cooling device as described in the first aspect in the field of cooling the charging gun line of a charging pile.

[0026] The present application provides a refrigerant-based heat dissipation cooling device, method and application thereof, and the device includes a compressor, a condenser, a throttle valve, a cooling pipe and a controller. The device compresses the gaseous refrigerant into a high-temperature and high-pressure state through a compressor, and transports it to the condenser for heat dissipation and cooling, and converts it into a high-pressure liquid refrigerant. Subsequently, the high-pressure liquid refrigerant is reduced in pressure by the throttle valve to become a low-temperature and low-pressure mist refrigerant, and enters the cooling pipe built into the charging gun line. The cooling pipe is in direct contact with the surface of the conductor inside the charging gun line, so that the low-temperature and low-pressure mist refrigerant absorbs the heat of the conductor and vaporizes into a gaseous state, thereby achieving the cooling of the charging gun line. The controller intelligently adjusts the speed of the compressor and the opening of the throttle valve according to the conductor temperature inside the charging gun line, ensures the closed-loop operation of the refrigerant cycle, and maintains an efficient heat dissipation effect. This device effectively solves the problem of low heat dissipation efficiency of the charging pile gun line during high-power charging, significantly improves the heat dissipation efficiency, and ensures that the high-power charging pile can work in a safe and stable state. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 An overall schematic diagram of a refrigerant-based heat dissipation cooling device provided in this application;

[0029] Figure 2 A schematic flow chart of the refrigerant-based heat dissipation and cooling method provided in this application.

[0030] 1. Compressor; 2. Condenser; 3. Throttle valve; 4. Cooling pipe; 5. Controller.

[0031] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein.

[0034] In the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0035] The present application provides a refrigerant-based heat dissipation cooling device, method and application thereof, and the device includes a compressor, a condenser, a throttle valve, a cooling pipe and a controller. The device compresses the gaseous refrigerant through a compressor and transports it to the condenser for heat dissipation and cooling, and then reduces the pressure through the throttle valve to a low-temperature and low-pressure mist refrigerant. The cooling pipe is built into the charging gun line and directly contacts the conductor, so that the refrigerant absorbs heat and vaporizes to achieve cooling. The controller intelligently adjusts the compressor speed and throttle valve opening according to the temperature of the conductor inside the charging gun line to maintain the closed-loop operation of the refrigerant circulation. This device significantly improves the heat dissipation efficiency of the charging pile gun line, ensures the safe and stable operation of the high-power charging pile, and solves the technical problem of low heat dissipation efficiency during high-power charging.

[0036] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0037] like Figure 1 As shown, the heat dissipation and cooling device based on refrigerant provided in this embodiment includes:

[0038] A compressor 1, a condenser 2, a throttle valve 3, a cooling pipe 4 and a controller 5, wherein the outlet of the compressor 1 is connected to the inlet of the condenser 2, the outlet of the condenser 2 is connected to the inlet of the throttle valve 3, the outlet of the throttle valve 3 is connected to the inlet of the cooling pipe 4, and the outlet of the cooling pipe 4 is connected to the inlet of the compressor 1 to form a closed circulation loop; the cooling pipe 4 is built into the charging gun line and directly contacts the conductor surface inside the charging gun line; the controller 5 is electrically connected to the compressor 1 and the throttle valve 3 respectively; wherein the compressor 1 is used to compress the gaseous refrigerant into The refrigerant in a high-temperature and high-pressure state is transported to the condenser 2, the condenser 2 is used to dissipate the heat and cool the refrigerant in a high-temperature and high-pressure state into a high-pressure liquid refrigerant, the throttle valve 3 is used to reduce the pressure of the high-pressure liquid refrigerant into a low-temperature and low-pressure mist refrigerant, the cooling pipe 4 is used to make the low-temperature and low-pressure mist refrigerant absorb the heat of the conductor inside the charging gun line and vaporize into a gas to cool the charging gun line, the controller 5 is used to adjust the speed of the compressor 1 and the opening of the throttle valve 3 according to the conductor temperature inside the charging gun line to maintain the closed-loop operation of the refrigerant circulation.

[0039] Furthermore, the cooling tube 4 is spirally wound on the conductor surface inside the charging gun line, and the spiral pitch of the cooling tube 4 is 1.2-1.5 times the diameter of the conductor.

[0040] Furthermore, the inner diameter of the inlet section of the cooling pipe 4 is 2.3-2.5 mm, and the inner diameter of the outlet section of the cooling pipe 4 is 3.0-3.2 mm, wherein the inlet section of the cooling pipe 4 is used to indicate the pipe section extending 50-80 mm from the outlet end of the throttle valve 3, and the outlet section of the cooling pipe 4 is used to indicate the pipe section 50-80 mm away from the inlet end of the compressor 1.

[0041] Furthermore, the condenser 2 comprises multiple layers of heat dissipation fins arranged in parallel, and the distance between adjacent heat dissipation fins is 0.8-1.0 mm.

[0042] In the specific implementation of this embodiment, the device includes a compressor 1, a condenser 2, a throttle valve 3, a cooling pipe 4 and a controller 5. The outlet of the compressor 1 is directly connected to the inlet of the condenser 2 to ensure that the refrigerant in a high-temperature and high-pressure state can smoothly enter the condenser 2. The outlet of the condenser 2 is connected to the inlet of the throttle valve 3, so that the high-pressure liquid refrigerant can flow into the throttle valve 3 for pressure reduction. The outlet of the throttle valve 3 is connected to the inlet of the cooling pipe 4, and the low-temperature and low-pressure mist refrigerant is transported to the cooling pipe 4. The outlet of the cooling pipe 4 is then connected to the inlet of the compressor 1, thereby forming a complete closed circulation loop.

[0043] The cooling tube 4 is designed and built into the charging gun cable. It is spirally wound around the conductor surface inside the charging gun cable, and the spiral pitch is precisely controlled between 1.2-1.5 times the conductor diameter to ensure the best heat dissipation effect. The material and thickness of the cooling tube 4 are carefully selected to withstand the pressure and temperature changes of the refrigerant while maintaining good thermal conductivity.

[0044] The inner diameter of the inlet section of the cooling pipe 4 is set to 2.3-2.5 mm, and this size range helps to ensure that the refrigerant can maintain an appropriate flow rate and pressure when entering the cooling pipe 4. The inner diameter of the outlet section of the cooling pipe 4 is slightly larger, 3.0-3.2 mm, and this design helps to reduce the flow rate and increase the pressure stability before the refrigerant leaves the cooling pipe 4 and enters the compressor 1. Here, the inlet section of the cooling pipe 4 refers to the pipe section extending 50-80 mm from the outlet end of the throttle valve 3, and the outlet section of the cooling pipe 4 refers to the pipe section 50-80 mm from the inlet end of the compressor 1.

[0045] The internal structure of the condenser 2 is unique, including multiple layers of parallel heat sink fins, and the spacing between adjacent heat sink fins is precisely controlled between 0.8-1.0mm. This design greatly increases the heat dissipation area of ​​the condenser 2 and improves the heat dissipation efficiency. The material and shape of the heat sink fins are also optimized to ensure the best heat dissipation performance and mechanical strength.

[0046] The controller 5 is electrically connected to the compressor 1 and the throttle valve 3 respectively, and intelligently adjusts the speed of the compressor 1 and the opening of the throttle valve 3 by real-time monitoring the conductor temperature inside the charging gun line. This intelligent control mechanism can ensure that the closed-loop operation of the refrigerant cycle is always kept in the best state, thereby effectively maintaining the low temperature state of the charging gun line and improving its heat dissipation efficiency and service life.

[0047] In summary, the refrigerant-based heat dissipation cooling device provided in this embodiment effectively solves the problem of low heat dissipation efficiency of the charging pile gun line during high-power charging, significantly improves the heat dissipation efficiency, and ensures that the high-power charging pile operates in a safe and stable state.

[0048] like Figure 2As shown, this embodiment provides a cooling method based on refrigerant, and the method is applied to Figure 1 The device of the embodiment, the method comprises:

[0049] S101: compressing the gaseous refrigerant into a high-temperature and high-pressure refrigerant through the compressor 1 and delivering it to the condenser 2;

[0050] S102: Cooling the refrigerant in a high-temperature and high-pressure state into a high-pressure liquid refrigerant by dissipating heat through the condenser 2;

[0051] S103: reducing the pressure of the high-pressure liquid refrigerant into a low-temperature and low-pressure mist refrigerant through the throttle valve 3;

[0052] S104: The low-temperature and low-pressure mist-like refrigerant absorbs the conductor heat inside the charging gun wire through the cooling tube 4 and vaporizes into a gas state to cool the charging gun wire;

[0053] S105: The controller 5 adjusts the rotation speed of the compressor 1 and the opening of the throttle valve 3 according to the conductor temperature inside the charging gun line to maintain the closed-loop operation of the refrigerant circulation.

[0054] Furthermore, the controller 5 adjusts the speed of the compressor 1 and the opening of the throttle valve 3 according to the conductor temperature inside the charging gun line, including:

[0055] When the conductor temperature inside the charging gun line is greater than a set threshold, the speed of the compressor 1 and the opening of the throttle valve 3 are increased synchronously;

[0056] When the conductor temperature inside the charging gun line is lower than a set threshold, the rotation speed of the compressor 1 and the opening of the throttle valve 3 are synchronously reduced;

[0057] When the conductor temperature inside the charging gun wire is equal to the set threshold, the rotation speed of the compressor 1 and the opening of the throttle valve 3 are kept unchanged.

[0058] This embodiment provides a cooling method based on a refrigerant, which is specifically applied to Figure 1 In the embodiment device shown. The detailed steps of the method are as follows:

[0059] First, the gaseous refrigerant is compressed by the compressor 1 to be converted into a high-temperature and high-pressure refrigerant, and then the high-temperature and high-pressure refrigerant is transported to the condenser 2. Inside the condenser 2, the high-temperature and high-pressure refrigerant undergoes heat dissipation treatment, the temperature gradually decreases, and finally is converted into a high-pressure liquid refrigerant.

[0060] Next, the high-pressure liquid refrigerant flows through the throttle valve 3. Under the action of the throttle valve 3, the high-pressure liquid refrigerant is depressurized to form a low-temperature, low-pressure mist refrigerant. This low-temperature, low-pressure mist refrigerant has better heat absorption performance.

[0061] Subsequently, the low-temperature, low-pressure mist refrigerant enters the cooling tube 4. The cooling tube 4 is cleverly designed and built into the charging gun line, directly contacting the conductor surface inside the charging gun line. Inside the cooling tube 4, the low-temperature, low-pressure mist refrigerant absorbs the heat of the conductor and gradually vaporizes into a gaseous state. In this process, the temperature of the charging gun line will be effectively reduced.

[0062] In order to ensure that the closed-loop operation of the refrigerant cycle is always maintained in the best state, the controller 5 will adjust the speed of the compressor 1 and the opening of the throttle valve 3 in real time according to the conductor temperature inside the charging gun line. The specific adjustment method is as follows:

[0063] When the conductor temperature inside the charging gun line is higher than a preset threshold value (such as 75°C), the controller 5 will simultaneously increase the speed of the compressor 1 and the opening of the throttle valve 3. This can increase the circulation speed and flow rate of the refrigerant, thereby improving the heat dissipation efficiency and quickly reducing the temperature of the charging gun line.

[0064] On the contrary, when the conductor temperature inside the charging gun line is lower than the set threshold, the controller 5 will synchronously reduce the speed of the compressor 1 and the opening of the throttle valve 3. This can reduce the circulation speed and flow of the refrigerant and avoid excessive heat dissipation leading to energy waste and equipment loss.

[0065] When the conductor temperature inside the charging gun line is exactly equal to the set threshold, the controller 5 will keep the speed of the compressor 1 and the opening of the throttle valve 3 unchanged. This ensures that the closed-loop operation of the refrigerant cycle remains in a stable state and maintains the appropriate temperature of the charging gun line.

[0066] In summary, the refrigerant-based heat dissipation cooling method provided in this embodiment has the advantages of simple operation, high heat dissipation efficiency, low energy consumption, etc. By accurately controlling the working state of the compressor and the throttle valve, the method can ensure the safe and stable operation of the charging gun line in a high-temperature working environment.

[0067] In a third aspect, the present invention provides an application of the refrigerant-based heat dissipation cooling device as described in the first aspect in the field of cooling the charging gun line of a charging pile.

[0068] This embodiment specifically demonstrates how to utilize the refrigerant-based heat dissipation cooling device (hereinafter referred to as “heat dissipation cooling device”) as described in the first aspect in the field of cooling the charging gun line of a charging pile.

[0069] First, we clarify the basic structure of the heat dissipation cooling device, which includes a compressor 1, a condenser 2, a throttle valve 3, a cooling pipe 4 and a controller 5. These components form a complete refrigerant circulation system through a specific connection method, and the specific connection method has been described in detail in the description of the first aspect and will not be repeated here.

[0070] In the application scenario of charging piles, the charging gun wire will generate a lot of heat during long-term high-power charging. If the heat is not dissipated in time, it may cause the charging gun wire to overheat and even cause safety hazards. Therefore, it is particularly important to apply the heat dissipation cooling device to cool the charging gun wire.

[0071] The specific implementation is as follows:

[0072] The cooling tube 4 is built into the charging gun line and ensures that it is in direct contact with the conductor surface inside the charging gun line. The design of the cooling tube 4 needs to meet specific spiral winding mode and spiral pitch requirements (as described in the first aspect) to ensure the best heat dissipation effect.

[0073] The other components of the heat dissipation cooling device are connected to form a complete refrigerant circulation system. The outlet of the compressor 1 is connected to the inlet of the condenser 2, the outlet of the condenser 2 is connected to the inlet of the throttle valve 3, the outlet of the throttle valve 3 is connected to the inlet of the cooling pipe 4, and the outlet of the cooling pipe 4 is connected to the inlet of the compressor 1.

[0074] The controller 5 is electrically connected to the compressor 1 and the throttle valve 3 respectively to realize intelligent control. The controller 5 has a preset temperature threshold and a corresponding control strategy built in.

[0075] When the charging pile starts working, the heat dissipation and cooling device is also started. Compressor 1 starts working, compressing the gaseous refrigerant into a high-temperature and high-pressure state and transporting it to condenser 2. In condenser 2, the high-temperature and high-pressure refrigerant is cooled down and becomes a high-pressure liquid refrigerant.

[0076] The high-pressure liquid refrigerant then flows through the throttle valve 3 and is reduced in pressure to a low-temperature, low-pressure mist refrigerant. After the low-temperature, low-pressure mist refrigerant enters the cooling tube 4, it begins to absorb the heat of the conductor inside the charging gun line and gradually vaporizes into a gaseous state.

[0077] The controller 5 monitors the conductor temperature inside the charging gun line in real time, and intelligently adjusts the speed of the compressor 1 and the opening of the throttle valve 3 according to the comparison result between the temperature and the preset threshold. When the conductor temperature is higher than the set threshold, the compressor speed and the throttle valve opening are increased to increase the heat dissipation efficiency; when the conductor temperature is lower than the set threshold, the compressor speed and the throttle valve opening are reduced to reduce energy consumption; when the conductor temperature is equal to the set threshold, the compressor speed and the throttle valve opening are kept unchanged to maintain a stable heat dissipation state.

[0078] Through the above-mentioned cycle process, the heat dissipation cooling device can continuously and effectively reduce the temperature of the charging gun line, ensuring its safe and stable operation during high-power charging.

[0079] In summary, this embodiment successfully applies the refrigerant-based heat dissipation cooling device to the cooling field of the charging pile charging gun line, achieving an efficient and intelligent heat dissipation effect.

[0080] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0081] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A heat dissipation cooling device based on refrigerant, characterized in that: include: A compressor (1), a condenser (2), a throttle valve (3), a cooling pipe (4) and a controller (5), wherein the outlet of the compressor (1) is connected to the inlet of the condenser (2), the outlet of the condenser (2) is connected to the inlet of the throttle valve (3), the outlet of the throttle valve (3) is connected to the inlet of the cooling pipe (4), and the outlet of the cooling pipe (4) is connected to the inlet of the compressor (1), so as to form a closed circulation loop; The cooling tube (4) is built into the charging gun wire and is in direct contact with the conductor surface inside the charging gun wire; The controller (5) is electrically connected to the compressor (1) and the throttle valve (3) respectively; The compressor (1) is used to compress the gaseous refrigerant into a high-temperature and high-pressure refrigerant and transport it to the condenser (2); the condenser (2) is used to dissipate the heat and cool the high-temperature and high-pressure refrigerant into a high-pressure liquid refrigerant; the throttle valve (3) is used to reduce the pressure of the high-pressure liquid refrigerant into a low-temperature and low-pressure mist refrigerant; the cooling pipe (4) is used to allow the low-temperature and low-pressure mist refrigerant to absorb the heat of the conductor inside the charging gun line and vaporize into a gaseous state to cool the charging gun line; the controller (5) is used to adjust the speed of the compressor (1) and the opening of the throttle valve (3) according to the temperature of the conductor inside the charging gun line to maintain the closed-loop operation of the refrigerant circulation.

2. The heat dissipation cooling device according to claim 1, characterized in that: The cooling tube (4) is spirally wound around the surface of the conductor inside the charging gun line, and the spiral pitch of the cooling tube (4) is 1.2-1.5 times the diameter of the conductor.

3. The heat dissipation cooling device according to claim 1, characterized in that: The inner diameter of the inlet section of the cooling pipe (4) is 2.3-2.5 mm, and the inner diameter of the outlet section of the cooling pipe (4) is 3.0-3.2 mm, wherein the inlet section of the cooling pipe (4) is used to indicate the pipe section extending 50-80 mm from the outlet end of the throttle valve (3), and the outlet section of the cooling pipe (4) is used to indicate the pipe section 50-80 mm away from the inlet end of the compressor (1).

4. The heat dissipation cooling device according to claim 1, characterized in that: The condenser (2) comprises multiple layers of heat dissipation fins arranged in parallel, and the distance between adjacent heat dissipation fins is 0.8-1.0 mm.

5. A heat dissipation cooling method based on refrigerant, characterized in that: The method is applied to the device according to any one of claims 1 to 4, and the method comprises: The compressor (1) compresses the gaseous refrigerant into a refrigerant in a high-temperature and high-pressure state and transmits the refrigerant to the condenser (2); The condenser (2) dissipates heat and cools the refrigerant in a high-temperature and high-pressure state into a high-pressure liquid refrigerant; The high-pressure liquid refrigerant is reduced in pressure to a low-temperature and low-pressure mist refrigerant by means of the throttle valve (3); The low-temperature and low-pressure mist-like refrigerant absorbs the conductor heat inside the charging gun wire through the cooling pipe (4) and vaporizes into a gaseous state so as to cool the charging gun wire; The controller (5) adjusts the rotation speed of the compressor (1) and the opening of the throttle valve (3) according to the conductor temperature inside the charging gun line to maintain the closed-loop operation of the refrigerant circulation.

6. The method according to claim 5, characterized in that The controller (5) is used to adjust the speed of the compressor (1) and the opening of the throttle valve (3) according to the conductor temperature inside the charging gun line, including: When the temperature of the conductor inside the charging gun line is greater than a set threshold, the rotation speed of the compressor (1) and the opening of the throttle valve (3) are simultaneously increased; When the temperature of the conductor inside the charging gun line is lower than a set threshold, the rotation speed of the compressor (1) and the opening of the throttle valve (3) are synchronously reduced; When the conductor temperature inside the charging gun wire is equal to a set threshold value, the rotation speed of the compressor (1) and the opening of the throttle valve (3) are kept unchanged.

7. An application of the refrigerant-based heat dissipation cooling device as described in any one of claims 1 to 4 in the field of cooling the charging gun line of a charging pile.

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