Charging gun temperature control device and charging pile

Abstract

The utility model provides a charging gun temperature control device and a charging pile. The charging gun temperature control device comprises a water pump, a water tank, a radiator, a charging gun and a first hose. The charging gun comprises a cooling pipe and a gun line, the gun line and the cooling pipe are arranged in parallel, a cooling channel is formed in the cooling pipe, and an inlet and an outlet of the cooling channel are both higher than the radiator in the height direction; the first hose is used for communicating a water outlet of the water pump with an inlet of the cooling channel and communicating an outlet of the cooling channel with a water inlet above the radiator; a water outlet below the radiator is communicated with a water inlet above the water tank, and a water outlet below the water tank is communicated with a water return port of the water pump; the water outlet of the water pump is further connected with the water inlet of the water tank through an air guide pipe which is provided with an electromagnetic ball valve. According to the scheme, water can be used as cooling liquid, the production cost and the operation and maintenance cost can be greatly reduced while it is ensured that the charging gun is not frostbitten, and the charging gun is environmentally friendly.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy automobile technical field especially, it is related to a kind of charging gun temperature control device and charging pile. BACKGROUND

[0002] With the continuous popularity of electric vehicles, charging piles are widely used, and more requirements are put forward for the performance of charging guns. The working of charging gun and its gun line may generate heat, thereby affecting the safety performance and service life of charging gun and its gun line. Therefore, it is usually necessary to take cooling measures for the working charging gun. The charging gun used by the traditional charging pile is mostly air-cooled charging gun. However, the air-cooled charging gun is usually difficult to meet the demand of large current, and is too bulky.

[0003] Although some liquid-cooled charging guns have appeared on the market to solve the above defects of air-cooled charging guns. However, the cooling liquid used by the liquid-cooled charging gun of the related technology is mostly water-based cooling liquid (i.e. the cooling liquid made by mixing water and other components, which avoids freezing of the cooling liquid by adding low-freezing-point mixing components, thereby avoiding freezing or damage of the gun line in low-temperature state). For example, ethylene glycol type water-based cooling liquid, propylene glycol type water-based cooling liquid, etc. However, the water-based cooling liquid used by the related technology is usually difficult to have excellent performance such as environmental protection and low price (for example: the ethylene glycol type water-based cooling liquid has certain toxicity and adds various preservatives, active agents, etc. in the composition, which may pollute the environment if it is leaked by accident; the cost of propylene glycol type water-based cooling liquid is high and the viscosity is large, which is easy to block). The production cost and operation and maintenance cost are high, which is difficult to meet the user's demand. UTILITY MODEL CONTENTS

[0004] The technical purpose of the utility model is to provide a charging gun temperature control device and charging pile, which aims to solve the problem that the charging gun temperature control device in the related technology is difficult to have environmental protection benefit and economic benefit.

[0005] To solve the above technical problems, the utility model is realized as follows: on the one hand, a charging gun temperature control device is provided, which comprises a water pump, a water tank, a radiator, a charging gun and a first hose. The charging gun comprises a cooling pipe and a gun line arranged in parallel, and a cooling channel is formed in the cooling pipe. In the height direction, the inlet and outlet of the cooling channel are both higher than the radiator. The first hose is used to connect the water outlet of the water pump and the inlet of the cooling channel, and to connect the outlet of the cooling channel and the water inlet above the radiator. The water outlet below the radiator is communicated with the water inlet above the water tank, and the water outlet below the water tank is communicated with the water return port of the water pump. The water outlet of the water pump is also connected with the water inlet of the water tank through a gas guide pipe, and an electromagnetic ball valve is installed on the gas guide pipe.

[0006] Further, the pipe diameter of the first hose is greater than the pipe diameter of the cooling pipe, and / or the pipe diameter of the gas guide pipe is greater than the pipe diameter of the cooling pipe.

[0007] Further, the radiator comprises an upper header pipe, a flat tube assembly and a lower header pipe; the upper header pipe is in communication with the outlet of the cooling channel, the flat tube assembly is connected between the upper header pipe and the lower header pipe, and the lower header pipe is in communication with the water inlet of the water tank.

[0008] Further, the pipe diameter of the upper header pipe and the pipe diameter of the lower header pipe are both greater than the pipe diameter of the first hose.

[0009] Further, a fixing frame provided with a radiator fan is further included, and the radiator is fixed on the fixing frame; the radiator fan is located at one side of the radiator to radiate heat for the radiator.

[0010] Further, the first hose and the cooling channel are connected through a water outlet water distributor, and the outlet of the cooling channel and the water inlet of the radiator are connected through a backwater water distributor.

[0011] Further, a heat-conducting blind pipe penetrating through the water tank body is further included; one end of the heat-conducting blind pipe is connected with the water outlet water distributor through a second hose, and the other end is connected with the water outlet of the water pump through a third hose.

[0012] Further, the outer side of the water outlet of the water pump and the outer periphery of the heat-conducting blind pipe are both provided with a heat preservation layer.

[0013] Further, a heat storage assembly is further included, which is used to absorb and store the heat radiated by the radiator.

[0014] In another aspect, a charging pile is provided, which comprises the charging pile and the charging gun temperature control device as described in the first aspect above, and the charging pile and the charging gun are electrically connected.

[0015] Compared with the prior art, the charging gun temperature control device and the charging pile have the beneficial effects that: the circulating pipeline of the application is composed of a water pump, a water tank, a radiator, a charging gun and a corresponding pipeline connection assembly. In the application scheme, the problem of pipeline freezing is solved through the design of the pipeline structure, and the selection range of the cooling liquid is expanded, so that the production cost and operation and maintenance cost of the equipment can be reduced by selecting low-cost and environmentally friendly cooling liquid. That is, through the design of the pipeline structure, the stress generated by the freezing expansion of the cooling pipe can be released into the first hose, avoiding the freezing and cracking of the cooling pipe. The design of the air guide pipe and the electromagnetic ball valve controls the pressure between the water tank and the water pump; when the water pump is idle, the electromagnetic ball valve can be switched to the fully open state, the air in the upper part of the water tank will quickly enter the pipeline between the water pump outlet and the cooling pipe inlet, and the liquid seal is released; when the water pump is working, the electromagnetic ball valve can be switched to the fully closed state, and the cooling liquid can quickly return to the water tank under the action of its own gravity. Such design not only can accurately control the circulating flow state of the cooling liquid in the circulating pipeline, but also can reduce the risk of cooling liquid leakage and environmental pollution even if water or other low-cost liquids are used as cooling liquid. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the working principle diagram of the charging gun temperature control device in the embodiment of the utility model;

[0017] Figure 2 is the structure schematic view of the radiator in the embodiment of the utility model;

[0018] Figure 3 is the overall structure schematic view of the charging gun temperature control device in the embodiment of the utility model;

[0019] Figure 4 is the structure schematic view of the water tank in the embodiment of the utility model.

[0020] In the drawings, the reference signs represent: 1, water pump; 2, water tank; 21, heat conduction blind pipe; 22, fourth hose; 3, radiator; 31, upper header; 32, flat pipe assembly; 33, lower header; 4, charging gun; 41, cooling pipe; 411, inflow channel; 412, outflow channel; 5, first hose; 6, air guide pipe; 61, electromagnetic ball valve; 7, backwater distributor; 8, water outlet distributor; 9, fixing frame; 91, temperature sensor. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application, and all other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the present application belong to the scope of protection of the present application.

[0022] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0023] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0024] Embodiment:

[0025] As Figures 1-4 shown, in the present embodiment, the charging gun temperature control device is applied to the charging gun in the charging pile, and the charging gun temperature control device comprises a water pump 1, a water tank 2, a radiator 3, a charging gun 4 and a first hose 5; the charging gun 4 comprises a cooling pipe 41 and a gun wire, an insulating layer is formed on the outside of the gun wire, the gun wire and the cooling pipe 41 are arranged in parallel, and a cooling channel is formed in the cooling pipe 41; in the height direction, the inlet and outlet of the cooling channel are both higher than the radiator 3; the first hose 5 is used to connect the water outlet of the water pump 1 and the inlet of the cooling channel, and is used to connect the outlet of the cooling channel and the water inlet above the radiator 3; the water outlet below the radiator 3 is communicated with the water inlet above the water tank 2, and the water outlet below the water tank 2 is communicated with the water return port of the water pump 1; the water outlet of the water pump 1 is also connected with the water inlet of the water tank 2 through an air guide pipe 6, and an electromagnetic ball valve 61 is installed on the air guide pipe 6.

[0026] Specifically, the circulation pipeline of the embodiment is composed of the water pump 1, the water tank 2, the radiator 3, the charging gun 4 and corresponding pipeline connection assemblies. In the embodiment, the cooling liquid used in the circulation pipeline can be water. Of course, in some other embodiments, the cooling liquid used in the circulation pipeline can also be ordinary water-based cooling liquid, etc. Preferably, water is used as the cooling liquid of the circulation pipeline, which is not only low in price, but also pollution-free to the environment and easy to replace. It can be understood that the water used as the cooling liquid can be deionized water, pure water, tap water, river water, etc., which is not limited herein. The cooling pipe 41 of the embodiment can be a pipe made of elastomer material and will not be frozen and cracked by the cooling liquid; the cooling pipe 41 includes an inflow passage 411 and an outflow passage 412, the inlet of the inflow passage 411 is connected with the water outlet of the water pump 1 through the first hose 5, the outlet of the inflow passage 411 is communicated with the inlet of the outflow passage 412, and the outlet of the outflow passage 412 is connected with the water inlet above the radiator 3. In the embodiment, the gun wire corresponding to the cooling pipe 41 can refer to the positive and negative wires of the charging gun 4, the cooling pipe 41 is in direct contact with the positive and negative wires, and the positive and negative wires are quickly heated during the charging of the automobile, which can quickly melt the ice in the cooling pipe 41, so that the cooling passage can quickly recover the conduction; that is, the cooling pipe 41 is in direct contact with the positive and negative wires, and in the case of a large current such as 400A / 500A / 600A, the temperature of the solid-state cooling liquid will rise in a very short time, and even can quickly rise to above 0℃ within a few seconds, so that the frozen cooling liquid is quickly melted, and then the liquid cooling circulation system forms a complete circulation loop, without affecting the subsequent circulation heat dissipation.

[0027] In the embodiment, through the design of the first hose 5, the stress generated by the frozen expansion of the cooling pipe 41 can be released into the first hose 5, avoiding the frozen cracking of the cooling pipe 41, and at the same time, the softness of the hose itself also makes it not be broken even if it is frozen. Through the design of the air guide pipe 6 and the electromagnetic ball valve 61, the pressure between the water tank 2 and the water pump 1 is controlled, and the electromagnetic ball valve 61 can be fully opened or fully closed according to the specified program; when the water pump 1 is idle, the electromagnetic ball valve 61 can be switched to the fully open state, the air in the upper part of the water tank 2 will quickly enter the pipeline between the water outlet of the water pump 1 and the water inlet of the cooling pipe 41, and the liquid seal is released; when the water pump 1 works, the electromagnetic ball valve 61 can be switched to the fully closed state, and the cooling liquid can quickly return to the water tank 2 under the action of its own gravity. Such design not only can accurately control the circulation flow state of the cooling liquid in the circulation pipeline, but also can avoid the problem of frozen expansion and breakage of the cooling pipe 41 even if a low-cost liquid such as water is used as the cooling liquid, and can reduce the risk of environmental pollution caused by cooling liquid leakage.

[0028] In some embodiments of the present application, the charging gun 4 comprises a gun wire and a cooling pipe 41 arranged outside the gun wire, the outside of the gun wire is provided with an insulation layer, and the gap between the insulation layer and the inner wall of the cooling pipe 41 forms a cooling channel, the heat transfer area between the cooling channel and the gun wire is large, and the cooling effect is good. In other embodiments of the present application, the charging gun 4 comprises a gun wire (not shown in the figure) and a cooling pipe 41, the cooling pipe 41 and the gun wire are arranged side by side, and the cooling pipe 41 and the gun wire with the insulation layer are independent of each other, the outer wall of the insulation layer and the cooling pipe 41 are in contact and close to each other, and a heat-conducting silicone grease material can also be filled between the cooling pipe 41 and the gun wire to improve the heat exchange efficiency between the gun wire and the cooling pipe 41. In some more specific embodiments, the cooling pipe 41 and the gun wire can be arranged one by one, or one cooling pipe 41 can be used to cool multiple gun wires at the same time, which is not limited here.

[0029] In the present application, the installation height of the inlet and outlet of the cooling pipe 41, the radiator 3, the water tank 2 and the water pump 1 decreases in turn. Through this height difference design, most of the cooling liquid in the circulating system can be returned to the water tank 2 in time, so that as long as the cooling liquid in the water tank 2 is managed, the freezing of the cooling liquid in the entire circulating pipeline can be avoided.

[0030] It should be noted that although in some cases the height of the charging gun 4 and part or all of its cable may be lower than the height of the connection between the gun wire and the charging pile, so that part of the cooling liquid in the cooling pipe 41 cannot return to the water tank 2, but this does not affect the normal operation of the circulating pipeline; because the position of the first hose 5 is lower than the cable cooling pipe 41 of the charging gun 4, and there is only air in the first hose 5 when it is not working, the stress generated by the freezing and expansion of the cooling pipe 41 will also be released to the first hose 5, and even part of the solid cooling liquid can fall into the first hose 5, so that the solid cooling liquid can effectively avoid freezing and cracking the cooling pipe 41. In addition, the cooling pipe 41 is made of soft material and has a certain expansion coefficient, so it is difficult to burst the hose even if the cooling liquid freezes.

[0031] As shown in Figure 1 In the present application, the water tank 2 can adopt the connection method of an open water tank, the installation base of the water tank 2 is located at the lowest position of the liquid cooling circulating system except the water pump 1, the radiator 3 is connected to the water inlet of the water tank 2, and the water inlet of the water tank 2 is located above the highest allowable liquid level of the water tank 2. When the water pump 1 is stopped, the cooling liquid returns to the inside of the water tank 2, and the air in the water tank 2 enters the inside of the first hose 5 and the cooling pipe 41. It can be understood that the minimum effective volume of the water tank 2 can be designed according to actual needs, and it is only necessary to ensure that the volume of the water tank 2 is greater than the total volume of the cooling liquid in the circulating pipeline, that is, to ensure that the cooling liquid does not exceed the highest allowable liquid level of the water tank 2 when the cooling liquid returns.

[0032] In the embodiment, the first hose 5 can have a larger diameter than the cooling pipe 41, and the air guide pipe 6 can have a larger diameter than the cooling pipe 41. In the embodiment, the first hose 5 is connected to the cooling pipe 41 through the water outlet distributor 8, and the outlet of the cooling pipe 41 is connected to the water inlet of the radiator 3 through the water return distributor 7.

[0033] Specifically, as shown in Figure 1 , the water outlet distributor 8 and the water return distributor 7 can be used to separate the bubbles and impurities in the cooling liquid to ensure the stable operation of the cooling system. The inlet and outlet of the cooling pipe 41 should be higher than the positions of the water outlet distributor 8 and the water return distributor 7, and the water inlet of the radiator 3, and the inner diameter of the first hose 5 should be larger than that of the cooling pipe 41 inside the charging gun 4. For example, when the inner diameter of the cooling pipe inside the cable of the charging gun 4 is 6 mm, the inner diameter of the first hose 5 can be 12.7 mm. In the embodiment, the first hose 5 should be installed vertically, or the first hose 5 can be slightly inclined, but the overall trend should be vertical to avoid the accumulation of cooling liquid. The water outlet distributor 8 and the water return distributor 7 should be installed between the highest liquid level of the water tank 2 and the inlet of the cooling pipe 41; the water outlet distributor 8 and the water return distributor 7 can be installed vertically, or the water outlet distributor 8 and the water return distributor 7 can be installed obliquely, but the distributors should have an overall vertical trend. The inner diameter of the distributor should be significantly larger than that of the cooling pipe 41. For example, when the inner diameter of the cooling pipe 41 inside the cable of the charging gun 4 is 6 mm, the inner diameter of the distributor can be 12.7 mm.

[0034] As shown in Figure 1 and 2 , in the embodiment, the radiator 3 includes an upper header pipe 31, a flat tube assembly 32, and a lower header pipe 33; the upper header pipe 31 is in communication with the outlet of the cooling pipe, the flat tube assembly 32 is connected between the upper header pipe 31 and the lower header pipe 33, and the lower header pipe 33 is in communication with the water inlet of the water tank 2. In the embodiment, the diameters of the upper header pipe 31 and the lower header pipe 33 are larger than that of the first hose 5.

[0035] Specifically, the radiator 3 should be placed between the highest liquid level of the water tank 2 and the outlet of the cooling pipe 41, and the water outlet of the radiator 3 should be lower than the position of the water return distributor 7. The inner diameters of the upper header pipe 31 and the lower header pipe 33 in the radiator 3 should be larger than that of the first hose 5, for example, when the inner diameter of the first hose 5 is 12.7 mm, the inner diameters of the upper header pipe 31 and the lower header pipe 33 can be 20 mm. In the embodiment, the flat tube assembly 32 includes a plurality of parallel flat tubes, and the length extension direction of the flat tubes is parallel to the height direction (as shown in Figure 1 ), or the flat tubes gradually incline downward from the end close to the upper header pipe 31 to the end close to the lower header pipe 33 (as shown in Figure 2That is, the flat tubes inside the radiator 3 should be installed vertically, or arranged in horizontal rows and slightly inclined, but the overall presents a vertical trend. As shown in Figure 2 When the flat tubes are arranged in horizontal rows, the installation direction of the radiator 3 should be inclined to the outlet side of the radiator 3. When the water pump 1 is stopped, the cooling liquid will quickly return to the water tank 2. The slight inclination of the radiator 3 can avoid the presence of residual cooling liquid inside the flat tubes. When the water pump 1 is started again, the flat tubes will not be blocked due to the freezing of the internal cooling liquid. It should be noted that in other embodiments, a pipe sheet type circular tube heat exchanger can also be used as the radiator 3 for heat dissipation, which is not limited herein.

[0036] As shown in Figure 1 and 3 In this embodiment, the charging gun temperature control device further includes a fixed frame 9 provided with a heat dissipation fan, and the radiator 3 is fixed to the fixed frame 9. The heat dissipation fan is located on one side of the radiator 3 (not shown in the figure) for dissipating heat from the radiator 3. Specifically, the fixed frame 9 can be a sheet metal bracket. The fixed frame 9 can not only be used to fix the radiator 3 and the heat dissipation fan, but also be used to install the water tank 2, the first hose 5, the water outlet distributor 8, the water return distributor 7 and other pipelines and pipeline components. The heat dissipation fan is connected with an external power supply module. The heat dissipation fan can be installed near the radiator 3 for dissipating heat from the radiator 3.

[0037] As shown in Figure 1 and 4 In this embodiment, a heat-conducting blind pipe 21 penetrating the water tank 2 is further included. One end of the heat-conducting blind pipe 21 is connected with the water outlet distributor 8 through a second hose, and the other end is connected with the water outlet of the water pump 1 through a third hose. In this embodiment, the outer side of the water outlet of the water pump 1 and the outer periphery of the heat-conducting blind pipe 21 are both provided with a heat preservation layer.

[0038] Specifically, the water tank 2 and the water pump 1 are both anti-frozen in this embodiment. The heat-conducting blind pipe 21 is installed inside the water tank 2. The heat-conducting blind pipe 21 can be a metal blind pipe welded to the water tank 2. The outer wall of the heat-conducting blind pipe 21 can directly contact and exchange heat with the cooling liquid inside the water tank 2, but the heat-conducting blind pipe 21 does not exchange mass with the cooling liquid inside the water tank 2. The heat-conducting blind pipe 21 has a vertical trend. The heat-conducting blind pipe 21 is connected with the water outlet of the water pump 1 and the water outlet distributor 8 through hoses on both sides. The water inlet position of the heat-conducting blind pipe 21 is higher than the water outlet of the water pump 1. The third hose connecting the water outlet of the water pump 1 with the heat-conducting blind pipe 21 is wrapped with heat preservation cotton, thereby reducing heat loss. In this embodiment, the water outlet of the water pump 1 and the water inlet of the water pump 1 are both connected with the cooling liquid of the water tank 2. Under low temperature conditions, bidirectional heat transfer is generated. Compared with the traditional unidirectional heat transfer mode, the temperature distribution of the cooling liquid inside the water pump 1 is more uniform.

[0039] In the embodiment, when the water pump 1 shell is a metal shell, a thermal insulation sponge can be attached to the shell in a low-temperature environment. Of course, in a high-temperature environment such as summer, no thermal insulation treatment is required. The water suction chamber, the water discharge chamber, the impeller assembly and other components of the water pump 1 that are in direct contact with the cooling liquid can remove heat through the flow of the cooling liquid to achieve cooling; the control circuit board and the motor of the water pump 1 are not in direct contact with the cooling liquid, and heat can be conducted through the outer shell to achieve heat dissipation. In addition, multiple temperature sensors 91 can be installed to monitor the temperature state of the water pump 1, the water tank 2 and the radiator 3, and when the temperature of the water pump 1 is less than 0℃, the water pump 1 is started to run for 1-2s, and the water in the water tank 2 and the water in the water pump 1 are mixed to prevent the water in the water pump 1 from rapidly decreasing to below 0℃ and freezing.

[0040] In the embodiment, the installation position of the water pump 1 is not higher than the water tank 2, the water outlet height of the water pump 1 should be lower than the lowest liquid level allowed by the water tank 2, and the greater the height difference between the water outlet of the water pump 1 and the lowest liquid level allowed by the water tank 2, the better. The distance between the water inlet of the water pump 1 and the water outlet of the water tank 2 should be as short as possible, and the inner diameter of the first hose 5 between the water pump 1 and the water outlet distributor 8 and the water tank 2 should be significantly larger than the inner diameter of the cooling pipe 41, and the larger the inner diameter, the better.

[0041] In the embodiment, the water pump 1 water inlet and the water tank 2 water outlet are installed in a short distance, and the water tank 2 water outlet and the water pump 1 water inlet can be connected together through the fourth hose 22; to avoid cavitation when the water pump 1 is working, to avoid large heat loss at low temperature, and to ensure convenient installation, the fourth hose 22 should be as short as possible. Thermal insulation sponge can also be wrapped around the water tank 2 water outlet, the fourth hose 22 and the water pump 1 water inlet to reduce heat loss. In order to prevent the formation of a cold bridge between the water pump 1 and the charging pile cabinet and to reduce heat loss, thermal insulation sponge can also be wrapped around the water pump 1 fixing feet to prevent heat exchange between the water pump 1 fixing feet and the surrounding air.

[0042] In the embodiment, the charging gun temperature control device further comprises a heat storage assembly (not shown in the figure), which is used to absorb and store the heat dissipated by the radiator 3. The heat storage assembly can recover and store the heat generated by the radiator 3 through one or more of thermoelectric conversion materials, heat pump technology and heat storage materials, which is not limited here.

[0043] Further, in a specific embodiment, in order to reduce energy consumption, the heat generated during charging in a low temperature environment can be recovered and stored in the water tank 2. Specifically, when the ambient temperature sensor 91 at the air inlet of the heat dissipation fan detects that the ambient temperature t1 is lower than 0°C, the control of the heat storage assembly starts the heat recovery mode. The flow direction of the cooling liquid in the circulating pipeline is: water pump 1→outlet water distributor 8→charging gun 4→return water distributor 7→heat sink 3→water tank 2→water pump 1. At this time, the water pump 1 can operate at a predetermined speed, and the heat dissipation fan is stopped, when the temperature sensor 91 arranged on the return water distributor 7 detects that the inlet temperature is stable at the allowable temperature a, the fan is gradually started, and the detected inlet temperature t2 is used as the target speed of the fan, so that the inlet temperature is stable at a. Since the heat sink 3 is continuously dissipating heat to the outside, when the ambient temperature is too low, even if the fan does not rotate, the excessive heat transfer temperature difference can cause excessive heat loss, which can cause the inlet temperature to rise to a. At this time, the water flow can be reduced by adjusting the working parameters of the water pump 1 to raise the inlet temperature. The present embodiment uses the heat recovery method to recover waste heat, which can ensure that the cooling liquid does not freeze for a long time in a low temperature environment, and achieve the effect of energy saving and consumption reduction.

[0044] In some embodiments of the present embodiment, an electric heating assembly (not shown in the figure) of the water tank 2 can also be provided, so that when the recovered heat does not meet the use requirements of the circulating pipeline, the cooling liquid in the water tank 2 can be heated by the electric heating assembly. That is, by adding an electric heating assembly inside the water tank 2, when there is no car to charge for a long time, the electric heating mode is started to avoid freezing of the cooling liquid inside the water tank 2. In actual application, in order to reduce operating costs, electric heating can be performed preferentially during valley electricity, secondly during flat electricity, and finally during peak electricity. Specifically, when the temperature sensor 91 in the water tank 2 detects that the cooling liquid temperature is less than the preset temperature b (0°C

[0045] In the embodiment, water is used as the cooling liquid, and the water has excellent thermodynamic performance parameters (specific heat, viscosity, thermal conductivity, etc.), good cooling effect, and can be directly discharged to the surrounding environment without pollution and biodegradation problems; water is easy to obtain, so that the cooling system cooling liquid transportation cost and operation and maintenance cost of part replacement are low. It can be seen that the charging gun temperature control device of the embodiment has the functions of heat recovery and electric heating, and can use the heat recovery method to store heat in the water tank 2. For the charging pile that frequently charges electric vehicles, even if the winter environment temperature is below 0 DEG C for a long time, the electric heating assembly does not need to be started to heat the cooling liquid. The electric heating assembly is used as an auxiliary heating tool to avoid the cooling liquid from being below 0 DEG C. Of course, in some specific embodiments, a large-size water tank 2 of 50L, 100L, etc. can be externally hung, and when a plurality of vehicles are continuously charged, as much heat as possible can be stored in the water tank 2. Even if the winter environment temperature is below 0 DEG C for a long time, and there is no vehicle to charge for a long time, the temperature of the cooling liquid stored can be maintained above 0 DEG C without starting the electric heating for a long time (for example, one week).

[0046] In the embodiment, the charging pile includes the charging pile and the charging gun temperature control device, and the charging pile and the charging gun 4 are electrically connected. The charging gun 4 can be controlled through the charging pile to charge the vehicle, and the charging gun temperature control device can ensure that the charging gun 4 maintains the required and appropriate temperature.

[0047] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A charging gun temperature control device for a charging pile, characterized in that, The device comprises a water pump, a water tank, a radiator, a charging gun and a first hose; the charging gun comprises a cooling pipe and a gun wire arranged in parallel, the cooling pipe is formed with a cooling channel, the inlet and outlet of the cooling channel are both higher than the radiator in the height direction; the first hose is used to connect the water outlet of the water pump and the inlet of the cooling channel, and to connect the outlet of the cooling channel and the water inlet above the radiator; the water outlet below the radiator is connected with the water inlet above the water tank, and the water outlet below the water tank is connected with the water return of the water pump; the water outlet of the water pump is also connected with the water inlet of the water tank through a gas guide pipe, and an electromagnetic ball valve is installed on the gas guide pipe.

2. The charging gun temperature control device of claim 1, wherein, The pipe diameter of the first hose is larger than that of the cooling pipe, and / or the pipe diameter of the gas guide pipe is larger than that of the cooling pipe.

3. The charging gun temperature control device of claim 1, wherein, The radiator comprises an upper header pipe, a flat pipe assembly and a lower header pipe; the upper header pipe is connected with the outlet of the cooling channel, the flat pipe assembly is connected between the upper header pipe and the lower header pipe, and the lower header pipe is connected with the water inlet of the water tank.

4. The charging gun temperature control device of claim 3, wherein, The pipe diameter of the upper header pipe and the pipe diameter of the lower header pipe are both larger than the pipe diameter of the first hose.

5. The charging gun temperature control device of claim 1, wherein, A fixing frame provided with a heat dissipation fan is further included, the radiator is fixed on the fixing frame, and the heat dissipation fan is located on one side of the radiator to dissipate heat for the radiator.

6. The charging gun temperature control device of claim 1, wherein, The first hose and the cooling channel are connected through a water outlet water distributor, and the outlet of the cooling channel and the water inlet of the radiator are connected through a water return water distributor.

7. The charging gun temperature control device of claim 6, wherein, A heat conduction blind pipe penetrating through the water tank body is further included; one end of the heat conduction blind pipe is connected with the water outlet water distributor through a second hose, and the other end is connected with the water outlet of the water pump through a third hose.

8. The charging gun temperature control device of claim 7, wherein, A heat preservation layer is arranged on the outer side of the water outlet of the water pump and the outer periphery of the heat conduction blind pipe.

9. The charging gun temperature control device of claim 1, wherein, A heat storage assembly is further included, which is used to absorb and store the heat dissipated by the radiator.

10. A charging post, characterized in that, The device comprises a charging pile and a charging gun temperature control device as claimed in any one of claims 1-9, and the charging pile and the charging gun are electrically connected.

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