Charging pile heat exchange system

Abstract

The utility model discloses a charging pile heat exchange system which comprises a refrigerating circuit and a cooling circuit, the refrigerating circuit comprises a first main circuit, a first branch circuit and a second branch circuit, and at least one of the first branch circuit and the second branch circuit communicates with the first main circuit; the first main path comprises a compressor and a first heat exchanger, the charging pile heat exchange system comprises a second heat exchanger, and the second heat exchanger comprises a first heat exchange part and a second heat exchange part; the first branch comprises a first heat exchange part, the second branch comprises a third heat exchanger, the third heat exchanger is used for exchanging heat with an energy storage battery, the cooling loop comprises a second heat exchange part and a fourth heat exchanger, and the fourth heat exchanger is used for exchanging heat with a charging gun line unit. The charging pile heat exchange system can meet the heat exchange requirements of the charging gun line and the energy storage battery at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange of charging piles, and in particular to a heat exchange system of a charging pile. Background Art

[0002] As the basic supporting facilities for new energy vehicles, charging piles are indispensable in the development of new energy vehicles. Charging piles can be included in the charging network system, and electric vehicles and other electrical equipment can directly obtain electricity from the power grid in the charging network system through charging piles. However, due to the limited load capacity of the power grid, the large amount of electricity required by the charging piles will bring huge pressure to the power grid. For example, when a large number of electric vehicles are concentrated in a period of time to charge, a large amount of electricity will be output from the power grid, resulting in a short-term capacity shortage of the power grid. If the power grid is under excessive pressure, it will reduce the charging quality of electrical equipment, and the integrated charging and storage charging piles can achieve high power output and stagger the power consumption of the power grid.

[0003] When charging and storing energy in an integrated charging pile and charging electric vehicles, the charging gun wire and the energy storage battery need heat exchange. Utility Model Content

[0004] The purpose of this application is to provide a charging pile heat exchange system that can simultaneously meet the heat exchange requirements of the charging gun line and the energy storage battery.

[0005] The purpose of this application is achieved through the following technical solutions:

[0006] A charging pile heat exchange system, comprising a refrigeration circuit and a cooling circuit, wherein the refrigeration circuit comprises a first main circuit, a first branch circuit and a second branch circuit, and at least one of the first branch circuit and the second branch circuit is connected to the first main circuit;

[0007] The first main circuit includes a compressor and a first heat exchanger, the charging pile heat exchange system includes a second heat exchanger, and the second heat exchanger includes a first heat exchange part and a second heat exchange part;

[0008] The first branch includes the first heat exchange part, the second branch includes a third heat exchanger, the third heat exchanger is used to exchange heat with the energy storage battery, the cooling circuit includes the second heat exchange part and a fourth heat exchanger, and the fourth heat exchanger is used to exchange heat with the charging gun line unit.

[0009] The charging pile heat exchange system provided in this application can simultaneously meet the heat exchange requirements of the charging gun line and the energy storage battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the heat exchange system of the charging pile of the present application;

[0011] Figure 2This is a state diagram of the heat exchange system of the charging pile of the present application in the first cooling mode;

[0012] Figure 3 This is a state diagram of the heat exchange system of the charging pile of the present application in the second cooling mode;

[0013] Figure 4 This is a state diagram of the heat exchange system of the charging pile of the present application in the third cooling mode;

[0014] Figure 5 This is a state diagram of the charging pile heat exchange system of the present application in the first preheating mode;

[0015] Figure 6 This is a state diagram of the charging pile heat exchange system of the present application in the second preheating mode. DETAILED DESCRIPTION

[0016] The exemplary embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. If there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The contents described in the following exemplary embodiments do not represent all embodiments consistent with the present invention; on the contrary, they are merely examples of devices, products and / or methods that are consistent with some aspects of the present invention and are recorded in the claims of the present invention.

[0017] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the scope of protection of the present invention. The singular forms "a", "said" or "the" used in the specification and claims of the present invention are also intended to include plural forms, unless the context clearly indicates other meanings.

[0018] It should be understood that the words used in the specification and claims of the present invention, such as "first", "second" and similar words, do not indicate any order, quantity or importance, but are only used to distinguish the names of features. Similarly, words such as "one" or "an" do not indicate a quantitative limitation, but indicate the existence of at least one. Unless otherwise specified, words such as "front", "rear", "upper", "lower" and similar words appearing in the present invention are only for the convenience of description and are not limited to a specific position or a spatial orientation. Words such as "include" or "comprise" are an open-ended expression, meaning that the elements appearing before "include" or "comprise" include the elements appearing after "include" or "comprise" and their equivalents, which does not exclude that the elements appearing before "include" or "comprise" may also include other elements. If "several" appears in the present invention, it means two or more.

[0019] The following will refer to Figures 1 to 6 The present invention is described in whole or in part.

[0020] like Figures 1 to 6 As shown, this embodiment provides a charging pile heat exchange system for exchanging heat between at least one charging gun line unit 100 and at least one energy storage battery 200 of at least one charging pile. The charging pile heat exchange system includes a refrigeration circuit and a cooling circuit, the refrigeration circuit is used to circulate refrigerant, and the cooling circuit is used to circulate coolant. The refrigeration circuit includes a first main circuit 11, a first branch 12 and a second branch 13, wherein the first branch 12 is connected in series with the first main circuit 11, the second branch 13 is connected in series with the first main circuit 11, and the first branch 12 is connected in parallel with the second branch 13. At least one of the first branch 12 and the second branch 13 is connected to the first main circuit 11.

[0021] The first main circuit 11 includes a compressor 111 and a first heat exchanger 112, and the charging pile heat exchange system includes a second heat exchanger 14, wherein the second heat exchanger 14 is a double-channel heat exchanger, and the second heat exchanger 14 includes a first heat exchange part 141 and a second heat exchange part 142. The first branch 12 includes a first throttling device 121 and a first heat exchange part 141, and the second branch 13 includes a second throttling device 131 and a third heat exchanger 132, and the third heat exchanger 132 is used to exchange heat with the energy storage battery. The cooling circuit includes a liquid pump 211, a second heat exchange part 142 and a fourth heat exchanger 212, and the liquid pump 211, the second heat exchange part 142 and the fourth heat exchanger 212 are connected in series, and the second heat exchange part 142 is connected between the liquid pump 211 and the fourth heat exchanger 212, and the fourth heat exchanger 212 is used to exchange heat with the charging gun line unit 100. Specifically, the fourth heat exchanger 212 is arranged in the charging gun line unit 100, and the charging gun line unit 100 includes a charging module, a charging cable and a liquid pipe. The fourth heat exchanger 212 is configured to dissipate heat for the charging module, and the charging module is connected to the charging cable. The fourth heat exchanger 212 is connected to the charging pile heat exchange system through the liquid pipe, and the liquid pipe is in contact with the charging cable for heat exchange, and the liquid pipe and the charging cable together form the charging gun line. Among them, the refrigerant flows in the first main road 11, the first branch road 12 and the second branch road 13, and the coolant flows in the cooling circuit. Therefore, the refrigerant flows through the first heat exchange part 141, and the coolant flows through the second heat exchange part 142. The coolant in the cooling circuit is driven by the liquid pump 211.

[0022] In this embodiment, the third heat exchanger 132 uses a liquid cooling plate, which can be in direct contact with the energy storage battery 200 to ensure uniform heat exchange.

[0023] In this embodiment, the first throttling device 121 is close to the liquid inlet end of the first heat exchange part 141 relative to the liquid outlet end of the first heat exchange part 141, and the second throttling device 131 is close to the liquid inlet end of the third heat exchanger 132 relative to the liquid outlet end of the third heat exchanger 132. The first throttling device 121 and the second throttling device 131 are used to throttle the high-pressure liquid refrigerant to achieve the purpose of reducing pressure and regulating flow. In addition, the first throttling device 121 can control the conduction or cutoff of the first branch 12, and the second throttling device 131 can control the conduction or cutoff of the second branch 13. The conduction state means that the refrigerant can enter and exit from the inlet and outlet of the branch; otherwise, it is in the cutoff state.

[0024] In this embodiment, the first throttling device 121 and the second throttling device 131 can be one of the throttling elements such as a thermal expansion valve and an electronic expansion valve. Preferably, the first throttling device 121 and the second throttling device 131 are both electronic expansion valves.

[0025] The cooling circuit includes a second main circuit 21 and a fourth branch circuit 22, and the second main circuit 21 and the fourth branch circuit 22 are connected in series. The second main circuit 21 includes a fourth heat exchanger 212, and the fourth branch circuit 22 includes a second heat exchange part 142.

[0026] The charging pile heat exchange system includes a cooling mode. In the cooling mode, the first throttling device 121 connects the first branch 12 with the first main road 11, the refrigerant in the first heat exchange part 141 cools the coolant in the second heat exchange part 142, and the fourth heat exchanger 212 cools the charging gun line unit 100; and / or, the second throttling device 131 connects the second branch 13 with the first main road 11, and the third heat exchanger 132 is used to cool the energy storage battery 200.

[0027] In this embodiment, the charging pile heat exchange system can provide at least three cooling modes for selection to meet different heat dissipation requirements. The charging pile heat exchange system includes a control unit, and the first throttling device 121 and the second throttling device 131 are both electrically connected to the control unit.

[0028] like Figure 2As shown, in the first refrigeration mode, the second throttling device 131 connects the second branch 13 and the first main road 11, and the second branch 13 and the first main road 11 form a refrigeration circuit. The compressor 111 is started, and the compressor 111 sucks in low-temperature and low-pressure gaseous refrigerant, and discharges high-temperature and high-pressure gaseous refrigerant after adiabatic compression. The gaseous refrigerant releases heat in the first heat exchanger 112 (condenser) and becomes a medium-temperature and high-pressure liquid refrigerant. The refrigerant flows through the second throttling device 131 and becomes a low-temperature and low-pressure gas-liquid two-phase after expansion isenthalpy throttling. The liquid refrigerant flowing through the third heat exchanger 132 (evaporator) absorbs the heat of the energy storage battery 200 and becomes a gaseous state. The temperature of the energy storage battery 200 decreases, and the gaseous refrigerant returns to the compressor 111, and the cycle repeats. At this time, the first throttling device 121 makes the first branch 12 in a closed state.

[0029] like Figure 3 As shown, in the second refrigeration mode, the first throttling device 121 connects the first branch 12 and the first main road 11, the first branch 12 and the first main road 11 form a refrigeration circuit, the compressor 111 is started, the compressor 111 sucks in low-temperature and low-pressure gaseous refrigerant, and discharges high-temperature and high-pressure gaseous refrigerant after adiabatic compression. The gaseous refrigerant releases heat in the first heat exchanger 112 (condenser) and becomes a medium-temperature and high-pressure liquid refrigerant. The refrigerant flows through the first throttling device 121 and becomes a low-temperature and low-pressure gas-liquid two-phase after expansion isenthalpic throttling. The liquid refrigerant absorbs heat in the first heat exchange part 141 of the second heat exchanger 14 (evaporator) and the coolant located in the second heat exchange part 142 to become a gas, and the gaseous refrigerant returns to the compressor 111, and the cycle repeats. In the cooling circuit, the heat release temperature of the coolant in the second heat exchange part 142 is reduced, and the low-temperature coolant enters the fourth heat exchanger 212 to cool the charging gun line unit 100. At this time, the second throttling device 131 puts the second branch 13 in a cut-off state.

[0030] like Figure 4As shown, in the third refrigeration mode, the first throttling device 121 connects the first branch 12 and the first main road 11, the first branch 12 and the first main road 11 form a refrigeration circuit, the second throttling device 131 connects the second branch 13 and the first main road 11, the second branch 13 and the first main road 11 form a refrigeration circuit, the compressor 111 is started, the compressor 111 sucks in low-temperature and low-pressure gaseous refrigerant, and discharges high-temperature and high-pressure gaseous refrigerant after adiabatic compression. The gaseous refrigerant releases heat in the first heat exchanger 112 (condenser) and becomes medium-temperature and high-pressure liquid refrigerant. The liquid refrigerant is divided into two paths, one of which flows through the first throttling device 121 and the other flows through the first throttling device 121. The liquid refrigerant flows through the second throttling device 131, and becomes a low-temperature and low-pressure gas-liquid two-phase after expansion isenthalpic throttling. The liquid refrigerant absorbs heat in the first heat exchange part 141 of the second heat exchanger 14 (evaporator) and the coolant in the second heat exchange part 142 to become a gas. The liquid refrigerant flowing through the third heat exchanger 132 (evaporator) absorbs the heat of the energy storage battery 200 to become a gas. The temperature of the energy storage battery 200 decreases, and finally the gaseous refrigerant returns to the compressor 111, and the cycle repeats. In the cooling circuit, the coolant releases heat in the second heat exchange part 142 and the temperature decreases. The low-temperature coolant enters the fourth heat exchanger 212 to cool the charging gun line unit 100.

[0031] The charging pile heat exchange system of this embodiment can not only dissipate heat for the charging gun line unit 100 and the energy storage battery 200 at the same time, but also dissipate heat for the charging gun line unit 100 and the energy storage battery 200 separately, thereby realizing independent control of the charging gun line unit 100 and the energy storage battery 200 to meet different heat dissipation requirements; in addition, in this embodiment, the compressor 111 is a variable frequency compressor, and the operation of the compressor 111 can be adjusted according to the actual load of multiple charging gun line units 100.

[0032] The charging pile heat exchange system includes a third branch 3 and a first valve 4, and the first valve 4 is connected between the compressor 111 and the first heat exchanger 112. The first valve 4 is a three-way valve, and the first valve 4 includes a first end 41, a second end 42 and a third end 43. The first end 41 has a first port, the second end 42 has a second port, and the third end 43 has a third port; the first port is an inlet, and the second port and the third port are both outlets, and the first port can be connected to the second port or the third port. The first end 41 is connected to the liquid outlet of the compressor 111, the second end 42 is connected to the liquid inlet of the first heat exchanger 112, and the third end 43 is connected to the liquid inlet of the third branch 3. The liquid outlet of the third branch 3 is located between the first heat exchanger 112 and the first throttling device 121, and the liquid outlet of the third branch 3 is also located between the first heat exchanger 112 and the second throttling device 131. In the cooling mode, the first port is connected to the second port, the first port is not connected to the third port, and the third branch 3 is in a cut-off state. The first valve element 4 is electrically connected to the control unit.

[0033] The charging pile heat exchange system includes a preheating mode. In the preheating mode, the control unit controls the first port of the first valve member 4 to be connected to the third port, the first throttling device 121 to connect the first branch 12 to the first main road 11, the refrigerant in the first heat exchange part 141 preheats the coolant in the second heat exchange part 142, and the fourth heat exchanger 212 preheats the charging gun line unit 100; or, the first port is connected to the third port, the second throttling device 131 connects the second branch 13 to the first main road 11, and the third heat exchanger 132 is used to preheat the energy storage battery 200.

[0034] In this embodiment, the charging pile heat exchange system can provide at least two preheating modes for selection to meet different preheating requirements.

[0035] See also Figure 5 In the first preheating mode, the control unit controls the first port of the first valve member 4 to be connected to the third port, the second throttling device 131 connects the second branch 13 and the first main path 11, the compressor 111 is started, the compressor 111 sucks in low-temperature and low-pressure gaseous refrigerant, and discharges high-temperature and high-pressure gaseous refrigerant after adiabatic compression. The gaseous refrigerant releases heat in the third heat exchanger 132 (condenser) and becomes medium-temperature and high-pressure liquid refrigerant. The heat released by the third heat exchanger 132 heats up the energy storage battery 200.

[0036] See also Figure 6 In the second preheating mode, the control unit controls the first port of the first valve member 4 to be connected to the third port, the first throttling device 121 connects the first branch 12 and the first main path 11, the compressor 111 is started, the compressor 111 sucks in low-temperature and low-pressure gaseous refrigerant, and discharges high-temperature and high-pressure gaseous refrigerant after adiabatic compression. The gaseous refrigerant in the first heat exchange part 141 of the second heat exchanger 14 (condenser) and the coolant located in the second heat exchange part 142 undergo a phase change and releases heat to become liquid, and the heated coolant flows through the fourth heat exchanger 212 to preheat the charging gun line unit 100.

[0037] The charging pile heat exchange system includes a fifth branch 5 and a second valve component 6. The fifth branch 5 includes a fifth heat exchanger 51. The fifth heat exchanger 51 is used to exchange heat with the power module 300. The second valve component 6 is connected between the fourth heat exchanger 212 and the second heat exchange part 142. Specifically, the second valve component 6 is a three-way flow valve. The second valve component 6 includes a fourth end 61, a fifth end 62 and a sixth end 63. The fourth end 61 has a fourth port, the fifth end 62 has a fifth port, and the sixth end 63 has a sixth port. The fourth port is an inlet, and the fifth port and the sixth port are both outlets. The fourth end 61 is connected to the liquid outlet of the second heat exchange part 142, the fifth end 62 is connected to the liquid inlet of the fourth heat exchanger 212, and the sixth end 63 is connected to the liquid inlet of the fifth branch 5. The liquid outlet of the fifth branch 5 is located between the fourth heat exchanger 212 and the liquid pump 211. The second valve element 6 is electrically connected to the control unit, and the flow distribution ratio of the two valve outlets is adjusted by controlling the opening of the three-way flow valve, and the three-way flow valve distributes the coolant flow flowing into the second main path.

[0038] In the cooling mode, the control unit controls the fourth port of the second valve member 6 to be connected to the fifth port and the sixth port, and the low-temperature coolant flowing out of the second heat exchange part 142 is divided into two paths, one path flows to the fourth heat exchanger 212 to cool the charging gun line unit 100, and the other path flows to the fifth heat exchanger 51 to cool the power module 300, and the power module 300 includes a PCB board. In this embodiment, the fifth heat exchanger 51 adopts a liquid cooling plate, which can be in direct contact with the power module 300, and the heat exchange is uniform.

[0039] In the preheating mode, the control unit controls the fourth port of the second valve member 6 to communicate with the fifth port, and the high-temperature coolant flowing out of the second heat exchange portion 142 flows to the fourth heat exchanger 212 , and the fourth heat exchanger 212 preheats the charging gun line unit 100 .

[0040] Considering that the change of ambient temperature will also affect the viscosity of the coolant in the heat exchange system of the charging pile, when the temperature is low in winter, the viscosity of the coolant becomes higher, and then the fluidity of the coolant becomes worse, and the worse the fluidity of the coolant affects the heat exchange effect. Therefore, in order to solve the above problem, even if the flow path is under the condition of low ambient temperature, the heat dissipation of the entire heat exchange system can be guaranteed. The second main path 21 also includes a heating unit 213, the liquid inlet end of the heating unit 213 is connected to the liquid outlet end of the second heat exchange part 142, and the liquid outlet end of the heating unit 213 is connected to the fourth end 61 of the second valve member 6. When the heat exchange system is in a cold environment in winter, the heating unit 213 starts to preheat or heat the coolant in the flow path in real time to reduce the viscosity of the coolant and ensure that the coolant can flow smoothly.

[0041] In the above embodiment, the coolant is a mixture of ethylene glycol and water in a certain proportion, such as a mixture of ethylene glycol and water in a ratio of 1:1. Of course, in some other embodiments, other coolants, such as cooling oil, etc., may also be used. When the seasons change or the ambient temperature changes greatly, the density of the coolant will also change, causing the volume to expand and shrink. To solve the above problem, in this embodiment, the second main path 21 includes a liquid replenishment and drainage device, which is connected between the liquid pump 211 and the fourth heat exchanger 212. The liquid replenishment and drainage device includes a water tank 214 and a pressure relief valve 215 arranged on the water tank 214. The liquid outlet of the water tank 214 is connected to the liquid inlet of the liquid pump 211. The liquid inlet end of the water tank 214 is connected to the liquid outlet end of the fourth heat exchanger 212; the connection includes direct connection and indirect connection, the direct connection is to directly connect the liquid outlet pipeline of the water tank 214 with the inlet pipeline of the liquid pump 211, and the indirect connection is to indirectly connect the liquid outlet pipeline of the water tank 214 with the inlet pipeline of the liquid pump 211 through a transfer pipeline; when the volume of the coolant expands, the excess coolant in the second main circuit 21 returns to the water tank 214 for storage, avoiding the occurrence of bursting of components, pipelines, etc. caused by the expansion of the coolant volume, thereby improving safety; when the volume of the coolant shrinks, the coolant in the water tank 214 can be supplemented to the second main circuit 21 to participate in the work.

[0042] The charging pile heat exchange system can dissipate heat or preheat for one charging gun line unit 100, or for multiple charging gun line units 100. When multiple charging gun line units 100 are provided, the multiple charging gun line units 100 constitute a charging terminal, each charging gun line unit 100 is provided in parallel, the charging gun line unit 100 includes a fourth heat exchanger 212, and the charging pile heat exchange system includes a first solenoid valve 7. The fourth heat exchanger 212 is connected in series with a first solenoid valve 7. One end of the first solenoid valve 7 is connected to the liquid inlet end of the fourth heat exchanger 212, and the other end of the first solenoid valve 7 is connected to the fifth end 62 of the second valve member 6. The first solenoid valve 7 is electrically connected to the control unit. The first solenoid valve 7 controls the opening or closing of this circuit of coolant. When one of the charging guns is not working, the corresponding charging gun line does not need to be dissipated. The first solenoid valve 7 of this circuit is in a closed state, and the coolant cannot enter this circuit for heat dissipation. When one of the charging guns is working, the corresponding charging gun line needs to be dissipated. The first solenoid valve 7 of this circuit is in an open state, and the coolant can enter this circuit for heat dissipation.

[0043] The charging pile heat exchange system can dissipate heat or preheat one energy storage battery 200, and can also dissipate heat or preheat multiple energy storage batteries 200. When multiple energy storage batteries 200 are provided, each energy storage battery 200 is provided in parallel.

[0044] The first main circuit 11 includes a gas-liquid separator 113 , which is connected between the compressor 111 and the second heat exchanger 14 . The gas-liquid separator 113 is used to separate the gas in the refrigeration circuit to improve safety.

[0045] The first main circuit 11 includes a liquid reservoir 114, and the liquid outlet of the third branch circuit 3 is located between the liquid reservoir 114 and the first heat exchanger 112. When the volume of the refrigerant expands, the excess refrigerant in the refrigeration circuit returns to the liquid reservoir 114 for storage, thereby avoiding the occurrence of bursting of components, pipelines, etc. due to the volume expansion of the refrigerant, thereby improving safety; when the volume of the refrigerant shrinks, the refrigerant in the liquid reservoir 114 can be added to the refrigeration circuit to participate in the work.

[0046] The first main circuit 11 includes a filter 115, and the liquid storage tank 114 is connected between the filter 115 and the first heat exchanger 112. The function of the filter 115 is to filter out impurities in the refrigerant, such as dust, various oxides and metal chips, to prevent the impurities from clogging the capillaries in the refrigeration system or damaging the compressor 111. On the other hand, impurities mixed in the refrigerant will affect the heat exchange effect. In addition, the filter 115 can also absorb residual moisture in the refrigeration system to prevent ice blockage and reduce the corrosion of moisture to the refrigeration system.

[0047] The above implementation modes are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that the technical personnel in the relevant technical field can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A charging pile heat exchange system, characterized in that: The invention comprises a refrigeration circuit and a cooling circuit, wherein the refrigeration circuit comprises a first main circuit (11), a first branch circuit (12) and a second branch circuit (13), and at least one of the first branch circuit (12) and the second branch circuit (13) is connected to the first main circuit (11); The first main circuit (11) comprises a compressor (111) and a first heat exchanger (112); the charging pile heat exchange system comprises a second heat exchanger (14); the second heat exchanger (14) comprises a first heat exchange part (141) and a second heat exchange part (142); The first branch (12) comprises the first heat exchange portion (141), the second branch (13) comprises a third heat exchanger (132), the third heat exchanger (132) is used for exchanging heat with the energy storage battery, the cooling circuit comprises the second heat exchange portion (142) and a fourth heat exchanger (212), the fourth heat exchanger (212) is used for exchanging heat with the charging gun line unit (100).

2. The charging pile heat exchange system according to claim 1, characterized in that: The first branch (12) comprises a first throttling device (121), and the first throttling device (121) is close to the liquid inlet end of the first heat exchange part (141) relative to the liquid outlet end of the first heat exchange part (141); the second branch (13) comprises a second throttling device (131), and the second throttling device (131) is close to the liquid inlet end of the third heat exchanger (132) relative to the liquid outlet end of the third heat exchanger (132); The charging pile heat exchange system has a cooling mode. In the cooling mode, the first throttling device (121) connects the first branch (12) with the first main road (11); and / or the second throttling device (131) connects the second branch (13) with the first main road (11).

3. The charging pile heat exchange system according to claim 2, characterized in that: The charging pile heat exchange system comprises a third branch (3) and a first valve component (4); the first valve component (4) is connected between the compressor (111) and the first heat exchanger (112); the first valve component (4) comprises a first end (41), a second end (42) and a third end (43); the second end (42) is connected to a liquid inlet end of the first heat exchanger (112); the third end (43) is connected to a liquid inlet end of the third branch (3); the liquid outlet end of the third branch (3) is connected between the first heat exchanger (112) and the first throttling device (121); and the liquid outlet end of the third branch (3) is connected between the first heat exchanger (112) and the second throttling device (131); The first end (41) has a first port, the second end (42) has a second port, and the third end (43) has a third port; In the cooling mode, the first port is connected to the second port; The charging pile heat exchange system has a preheating mode. In the preheating mode, the first port is connected to the third port.

4. The charging pile heat exchange system according to claim 3, characterized in that: The cooling circuit comprises a second main circuit (21) and a fourth branch circuit (22), the second main circuit (21) comprises the fourth heat exchanger (212), the fourth branch circuit (22) comprises the second heat exchange part (142), The charging pile heat exchange system comprises a fifth branch (5) and a second valve member (6), the fifth branch (5) comprises a fifth heat exchanger (51), and the fifth heat exchanger (51) is used for exchanging heat with a power module (300). The second valve member (6) is connected between the fourth heat exchanger (212) and the second heat exchange portion (142); the second valve member (6) comprises a fourth end (61), a fifth end (62) and a sixth end (63); the fourth end (61) is connected to the liquid outlet of the second heat exchange portion (142); the fifth end (62) is connected to the liquid inlet of the fourth heat exchanger (212); the sixth end (63) is connected to the liquid inlet of the fifth branch (5); and the liquid outlet of the fifth branch (5) is connected between the fourth heat exchanger (212) and the liquid pump (211); The fourth end (61) has a fourth port, the fifth end (62) has a fifth port, and the sixth end (63) has a sixth port; In the cooling mode, the fourth port is in communication with the fifth port and the sixth port; In the preheating mode, the fourth port is communicated with the fifth port.

5. The charging pile heat exchange system according to claim 4, characterized in that: The second main path (21) comprises a heating unit (213), the liquid inlet end of the heating unit (213) is connected to the liquid outlet end of the second heat exchange portion (142), and the liquid outlet end of the heating unit (213) is connected to the fourth end (61) of the second valve member (6).

6. The charging pile heat exchange system according to claim 4, characterized in that: The second main circuit (21) comprises a liquid replenishing and draining device, the liquid replenishing and draining device being connected between the liquid pump (211) and the fourth heat exchanger (212), the liquid replenishing and draining device comprising a water tank (214) and a pressure relief valve (215) arranged on the water tank (214), the liquid outlet end of the water tank (214) being connected to the liquid inlet end of the liquid pump (211), and the liquid inlet end of the water tank (214) being connected to the liquid outlet end of the fourth heat exchanger (212).

7. The charging pile heat exchange system according to claim 4, characterized in that: The charging pile heat exchange system comprises a first solenoid valve (7), the first solenoid valve (7) being connected in series with the fourth heat exchanger (212), one end of the first solenoid valve (7) being connected to a liquid inlet end of the fourth heat exchanger (212), and the other end of the first solenoid valve (7) being connected to the fifth end (62) of the second valve member (6).

8. The charging pile heat exchange system according to claim 1, characterized in that: The first main path (11) comprises a gas-liquid separator (113), and the gas-liquid separator (113) is connected between the compressor (111) and the second heat exchanger (14).

9. The charging pile heat exchange system according to claim 3, characterized in that: The first main circuit (11) comprises a liquid reservoir (114), and the liquid outlet end of the third branch circuit (3) is located between the liquid reservoir (114) and the first heat exchanger (112).

10. The charging pile heat exchange system according to claim 9, characterized in that: The first main path (11) comprises a filter (115), and the liquid storage device (114) is connected between the filter (115) and the first heat exchanger (112).

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