A centralized charging gun cooling system

Abstract

The present invention provides a centralized charging gun cooling system, which includes: a water tank; a water pump, the liquid inlet end of the water pump is connected to the water tank through a first pipeline; a liquid outlet joint, the liquid outlet joint is connected to the liquid outlet end of the water pump through a second pipeline; a plurality of third pipelines, the plurality of third pipelines correspond to a plurality of charging guns one by one, the first end of each third pipeline is connected to the liquid outlet joint, and the second end thereof is connected to the charging gun through a solenoid valve; a liquid return joint, the liquid return joint is connected to a plurality of charging guns to receive the coolant from the charging gun; a cooling device, the first end of the cooling device is connected to the liquid return joint, and the second end thereof is connected to the water tank, and the cooling device is used to cool the coolant; a controller, the controller is connected to the solenoid valve, the water pump and the charging gun, so as to control the opening of the solenoid valve corresponding to the charging gun and the start of the water pump according to the use of the charging gun. The centralized charging gun cooling system of the present invention can cool a plurality of charging guns synchronously and efficiently, saving costs.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicles, and in particular to a centralized charging gun cooling system. Background Art

[0002] During the charging process of new energy vehicles, the charging gun will generate a lot of heat, especially fast charging, which poses a safety hazard.

[0003] The existing charging gun cooling system usually uses one cooling system to cool one charging gun. Charging stations need to purchase multiple cooling systems, which is costly and wasteful when there are insufficient charging vehicles. Summary of the invention

[0004] In view of the above-mentioned problems in the prior art, an object of the present invention is to provide a centralized charging gun cooling system, which can cool multiple charging guns synchronously and efficiently, thereby saving costs.

[0005] In order to solve the above problems, the present invention provides a centralized charging gun cooling system, the centralized charging gun cooling system comprising:

[0006] A water tank, the water tank being used to contain a coolant;

[0007] A water pump, wherein a liquid inlet end of the water pump is connected to the water tank via a first pipeline;

[0008] A liquid outlet connector, the liquid outlet connector being connected to a liquid outlet end of the water pump via a second pipeline;

[0009] A plurality of third pipelines, wherein the plurality of third pipelines correspond to the plurality of charging guns one by one, a first end of each of the third pipelines being connected to the liquid outlet connector, and a second end of each of the third pipelines being connected to the charging gun via a solenoid valve to provide the cooling liquid to the charging gun;

[0010] A liquid return connector, the liquid return connector is connected to a plurality of the charging guns to receive the coolant from the charging guns;

[0011] A cooling device, wherein a first end of the cooling device is connected to the liquid return joint, and a second end of the cooling device is connected to the water tank, and the cooling device is used to cool the coolant;

[0012] A controller is connected to the solenoid valve, the water pump and the charging gun to control the opening of the solenoid valve and the start-up of the water pump corresponding to the charging gun according to the use of the charging gun.

[0013] Furthermore, the water pump includes a plurality of water pumps, the plurality of water pumps are connected to the water tank through a plurality of the first pipelines, and the plurality of water pumps are connected to the liquid outlet joint through a plurality of the second pipelines,

[0014] The controller controls a corresponding number or proportion of the water pumps to start according to the proportion of the number of the used charging guns to the total number of the charging guns.

[0015] Furthermore, the charging guns include four, the water pumps include two,

[0016] The controller controls the solenoid valve corresponding to the used charging gun to start, and the water pump to start according to the use of one of the four charging guns;

[0017] The controller controls the two solenoid valves corresponding to the two charging guns in use, and one of the water pumps to start, according to the use of two of the four charging guns;

[0018] The controller controls the three solenoid valves corresponding to the three charging guns in use to start, and the two water pumps to start, according to the use of three of the four charging guns;

[0019] According to the fact that all four charging guns are in use, the controller controls the four solenoid valves corresponding to the four charging guns in use to start, and the two water pumps to start.

[0020] Furthermore, the centralized charging gun cooling system further includes:

[0021] A plurality of terminal cut-off joints, each of which corresponds to the plurality of third pipelines one by one, each of which comprises a first joint and a second joint, the second end of each of the third pipelines is connected to the solenoid valve via the first joint, and each of the charging guns is connected to the liquid return joint via the second joint.

[0022] Furthermore, the cooling device comprises:

[0023] Two microchannel radiators, the two microchannel heat exchangers are arranged facing each other and are both located below the water tank, the bottoms of the two microchannel radiators are connected to the liquid return joint, and the tops thereof are connected to the water tank;

[0024] A fan is perpendicular to the microchannel radiator and is located on the side and / or bottom of the microchannel radiator.

[0025] Furthermore, the centralized charging gun cooling system further includes:

[0026] A temperature sensor, the temperature sensor is inserted into the liquid outlet joint to detect the current temperature of the coolant in the liquid outlet joint;

[0027] The controller is connected to the temperature sensor, the pump and the fan to control the rotation speeds of the fan and the pump according to the difference between the current temperature and the predetermined temperature.

[0028] Furthermore, the centralized charging gun cooling system further includes:

[0029] A filter, the filter is connected to the liquid return joint, and the cooling device is connected to the liquid return joint through the filter;

[0030] A pressure sensor is inserted into the liquid return joint to detect the current pressure of the coolant in the liquid return joint.

[0031] Furthermore, the centralized charging gun cooling system further includes:

[0032] A flow sensor, wherein the first end of the flow agent is connected to the filter, and the second end thereof is connected to the cooling device, the filter is connected to the cooling device via the flow sensor, and the flow sensor is used to detect the current flow of the coolant,

[0033] The fans include two groups, and the two groups of fans are respectively arranged on the side and bottom of the microchannel radiator.

[0034] The controller is connected to the flow sensor to start one of the two groups of fans according to the current flow being lower than the predetermined flow, and to start both groups of fans according to the current flow being greater than the predetermined flow.

[0035] Furthermore, the controller is also connected to the pressure sensor, and the controller issues a liquid return abnormality alarm based on the current pressure detected by the pressure sensor being lower than the corresponding pressure corresponding to the start-up number and speed of the water pump and exceeding a predetermined pressure value, and the controller issues a filter blockage alarm based on the current flow detected by the flow sensor being lower than the corresponding flow corresponding to the current pressure and exceeding a predetermined flow value.

[0036] Furthermore, the centralized charging gun cooling system further includes:

[0037] A branching block, each of which has two mutually independent first and second chambers;

[0038] a first connecting pipe and a second connecting pipe, wherein the first connecting pipe is connected to the first chamber, and the second connecting pipe is connected to the second chamber,

[0039] The first chamber and the first connecting pipe form the liquid outlet joint, and the second chamber and the second connecting pipe form the liquid return joint.

[0040] Due to the above technical solution, the present invention has the following beneficial effects:

[0041] According to the centralized charging gun cooling system of the present invention, multiple charging guns are connected one by one through multiple third pipelines. When some or all of the charging guns are in use, the controller controls the solenoid valve corresponding to the charging gun to open and controls the water pump to start. The water pump draws coolant from the water tank to the liquid outlet joint, and outputs the coolant through the third pipeline corresponding to the charging gun, so as to cool the charging gun and avoid safety hazards caused by overheating of the charging gun. The coolant after cooling the charging gun flows into the return liquid joint, and is cooled by the cooling device, and then flows back to the water tank. This reciprocating process continuously and stably cools the charging gun. Multiple charging guns can be cooled by a centralized charging gun cooling system, which is efficient and avoids using too many cooling systems to cool multiple charging guns, which can save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 is a structural diagram of a centralized charging gun cooling system according to an embodiment of the present invention;

[0044] Figure 2 yes Figure 1 Another view of the connector of the centralized charging gun cooling system;

[0045] Figure 3 is a structural diagram of a centralized charging gun cooling system according to another embodiment of the present invention;

[0046] Figure 4 is a schematic diagram of a centralized charging gun cooling system according to an embodiment of the present invention.

[0047] 100, water tank; 200, water pump; 310, temperature sensor; 320, pressure sensor; 330, flow sensor; 340, filter; 410, third pipeline; 420, terminal stop valve; 430, solenoid valve; 510, microchannel radiator; 520, fan; 610, branch block; 621, first connecting pipe; 622, second connecting pipe; 700, controller; 800, charging gun. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned 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 data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0050] Next, a centralized charging gun cooling system according to an embodiment of the present invention is described.

[0051] like Figures 1 to 4 As shown, the centralized charging gun cooling system of the embodiment of the present invention includes: a water tank 100, a water pump 200, a liquid outlet joint, a plurality of third pipelines 410, a liquid return joint, a cooling device and a controller 700.

[0052] First, the water tank 100 and the water pump 200 are described. The water tank 100 is used to contain a coolant. The liquid inlet end of the water pump 200 is connected to the water tank 100 through a first pipeline. The coolant can be silicone oil, pure water, etc.

[0053] That is, the water pump 200 pumps the coolant contained in the water tank 100 through the first pipeline.

[0054] Next, the liquid outlet connector and the plurality of third pipes 410 are described. The liquid outlet connector is connected to the liquid outlet end of the water pump 200 through the second pipe. The plurality of third pipes 410 correspond to the plurality of charging guns 800 one by one, and the first end of each third pipe 410 is connected to the liquid outlet connector, and the second end thereof is connected to the charging gun 800 through the solenoid valve 430 to provide cooling liquid to the charging gun 800.

[0055] like Figure 4 As shown, the plurality of third pipelines 410 receive the coolant from the liquid outlet connector and deliver the coolant to the corresponding charging guns 800 , thereby achieving synchronous cooling of the plurality of charging guns 800 and improving the cooling efficiency.

[0056] The number of the third pipelines 410 can be two, three, four, five, six, etc., according to actual needs.

[0057] Next, the liquid return connector and the cooling device are described. The liquid return connector is connected to a plurality of charging guns 800 to receive the cooling liquid from the charging guns 800. The first end of the cooling device is connected to the liquid return connector, and the second end thereof is connected to the water tank 100, and the cooling device is used to cool the cooling liquid.

[0058] The liquid return connector receives the coolant after cooling the charging gun 800 . The cooling device cools the coolant from the liquid return connector and then inputs the coolant into the water tank 100 , thereby continuously cooling the charging gun 800 .

[0059] The cooling device may be a finned radiator as described below, or a water chiller, etc.

[0060] Finally, the controller 700 is described. The controller 700 is connected to the electromagnetic valve 430, the water pump 200 and the charging gun 800, so as to control the opening of the electromagnetic valve 430 and the start of the water pump 200 corresponding to the charging gun 800 according to the use of the charging gun 800.

[0061] The controller 700 controls the solenoid valve 430 and the water pump 200 according to the use of different numbers of charging guns 800, so as to meet the requirements of synchronous cooling of multiple charging guns 800.

[0062] The centralized charging gun cooling system described above connects multiple charging guns 800 one by one through multiple third pipes 410. When some or all of the charging guns 800 are in use, the controller 700 controls the solenoid valve 430 corresponding to the charging gun 800 to open and controls the water pump 200 to start. The water pump 200 extracts coolant from the water tank 100 to the liquid outlet joint, and outputs the coolant through the third pipe 410 corresponding to the charging gun 800 to achieve cooling of the charging gun 800, avoiding safety hazards caused by overheating of the charging gun 800. The coolant after cooling the charging gun 800 flows into the liquid return joint, and is cooled by the cooling device, and then flows back to the water tank 100, and so on, so as to continuously and stably cool the charging gun 800. As a result, multiple charging guns 800 can be cooled by a centralized charging gun cooling system, which is efficient, and avoids using too many cooling systems to cool multiple charging guns 800, which can save costs.

[0063] In some embodiments of the present invention, the water pump 200 includes a plurality of water pumps 200, the plurality of water pumps 200 are respectively connected to the water tank 100 through a plurality of first pipelines, and the plurality of water pumps 200 are respectively connected to the liquid outlet joints through a plurality of second pipelines, and the controller 700 controls the corresponding number or proportion of water pumps 200 to start according to the ratio of the number of charging guns 800 in use to the total number of charging guns 800. The number of water pumps 200 may be two, three, four, five, etc.

[0064] For example, there are four water pumps 200 to cool eight charging guns 800. If 1 / 8 to 2 / 8 of the charging guns 800 are in use, one water pump 200 (1 / 4 of the water pumps 200) is turned on, if 3 / 8 to 4 / 8 of the charging guns 800 are in use, two water pumps 200 (2 / 4 of the water pumps 200) are turned on, if 5 / 8 to 6 / 8 of the charging guns 800 are in use, three water pumps 200 (3 / 4 of the water pumps 200) are turned on, and if 7 / 8 to 8 / 8 of the charging guns 800 are in use, four water pumps 200 (4 / 4 of the water pumps 200) are turned on. In this way, energy consumption can be saved while satisfying the requirement of synchronous cooling of multiple charging guns 800.

[0065] Further, the charging guns 800 include four and the water pumps 200 include two. The controller 700 controls one solenoid valve 430 corresponding to the charging gun 800 in use to start, and one of the water pumps 200 to start, according to the use of one of the four charging guns 800. The controller 700 controls two solenoid valves 430 corresponding to the two charging guns 800 in use to start, and one of the water pumps 200 to start, according to the use of two of the four charging guns 800. The controller 700 controls three solenoid valves 430 corresponding to the three charging guns 800 in use to start, and both water pumps 200 to start, according to the use of three of the four charging guns 800. The controller 700 controls four solenoid valves 430 corresponding to the four charging guns 800 in use to start, and both water pumps 200 to start, according to the use of all four charging guns 800.

[0066] like Figure 4 As shown, the controller 700 controls two water pumps 200 to cool four charging guns 800 (four charging guns A / B / C / D). By controlling the starting number of the solenoid valves 430 and the water pumps 200, the corresponding number of solenoid valves 430 and the corresponding number of water pumps 200 are started on demand, so as to efficiently cool the charging guns 800 and save energy.

[0067] In some embodiments of the present invention, multiple terminal cut-off connectors 420 are provided. The multiple terminal cut-off connectors 420 correspond to the multiple third pipelines 410 one by one, and each terminal cut-off connector 420 includes a first connector and a second connector. The second end of each third pipeline 410 is connected to the solenoid valve 430 through the first connector, and each charging gun 800 is connected to the liquid return connector through the second connector. The terminal cut-off connector is a known technology, and the specific structure is not repeated here.

[0068] like Figure 4As shown, the terminal cut-off connector 420 can be easily plugged in and out, and when the first connecting tube connecting the terminal cut-off connector 420 and the solenoid valve 430 is pulled out, and when the second connecting tube connecting the charging gun 800 and the terminal cut-off connector 420 is pulled out, the coolant will not flow out, and even if part of the charging gun 800 or the solenoid valve 430 fails and needs to be repaired, the first connecting tube and / or the second connecting tube can be pulled out, and the damaged charging gun 800 and the solenoid valve 430 can be removed without affecting the use of other charging guns 800.

[0069] In some embodiments of the present invention, the cooling device includes two microchannel radiators 510 and a fan 520. The two microchannel heat exchangers are arranged facing each other and are both located below the water tank 100. The bottoms of the two microchannel radiators 510 are connected to the liquid return joint, and the tops thereof are connected to the water tank 100. The fan 520 is perpendicular to the microchannel radiator 510 and is located on the side and / or bottom of the microchannel radiator 510.

[0070] like Figure 1 As shown, two microchannel radiators 510 are arranged below the water tank 100 and face each other, and two fans 520 arranged up and down are arranged on the sides of the two radiators. The two fans 520 perform forced convection on the two microchannel radiators 510 to cool the microchannel radiators 510, and further cool the coolant flowing in the two microchannel radiators 510. The coolant flows from bottom to top in the microchannel radiator 510.

[0071] It should be noted that the above are only optional examples, and the fan 520 may also be disposed at the bottom of the microchannel radiator 510 (not shown) to perform vertical blowing or westerly wind, which should all be understood to be within the scope of the present invention.

[0072] By providing two microchannel radiators 510 , the heat exchange area can be increased, the heat dissipation efficiency can be improved, and even if one of the microchannel radiators 510 fails, it can still be used, thereby increasing the stability of operation.

[0073] Furthermore, the centralized charging gun cooling system also includes a temperature sensor 310. The temperature sensor 310 is inserted into the liquid outlet connector to detect the current temperature of the coolant in the liquid outlet connector. The controller 700 is connected to the temperature sensor 310, the water pump 200 and the fan 520 to control the speed of the fan 520 and the water pump 200 according to the difference between the current temperature and the predetermined temperature.

[0074] For example, if the current temperature is higher than the predetermined temperature, the controller 700 may increase the speed of the fan 520 and / or the speed of the pump. If the current temperature is lower than the predetermined temperature, the controller 700 may reduce the speed of the fan 520 and / or the speed of the pump, so that the current temperature is maintained at the predetermined temperature, thereby using the coolant at the predetermined temperature to efficiently cool the charging gun 800.

[0075] Furthermore, the centralized charging gun cooling system further includes a filter 330 and a pressure sensor 320. The filter 330 is connected to the liquid return joint, and the cooling device is connected to the liquid return joint through the filter 330. The pressure sensor 320 is inserted into the liquid return joint to detect the current pressure of the coolant in the liquid return joint.

[0076] The coolant from the charging gun 800 can be filtered through the filter 330 , and the filtered coolant flows into the cooling device and the water tank 100 to prevent external pollutants and impurities from clogging the system.

[0077] The current pressure of the coolant can be accurately known through the pressure sensor 320. When the current pressure of the coolant fails, it is convenient for personnel to handle it in time to avoid safety hazards.

[0078] Furthermore, the centralized charging gun cooling system also includes a flow sensor 340. The first end of the flow agent is connected to the filter 330, and the second end thereof is connected to the cooling device. The filter 330 is connected to the cooling device through the flow sensor 340, and the flow sensor 340 detects the current flow of the coolant. The fan 520 includes two groups, and the two groups of fans 520 are respectively arranged on the side and bottom of the microchannel radiator 510. The controller 700 is connected to the flow sensor 340 to turn on one of the two groups of fans 520 according to the current flow rate being lower than the predetermined flow rate, and to turn on all two groups of fans 520 according to the current flow rate being greater than the predetermined flow rate.

[0079] like Figure 1 and Figure 4 As shown, the flow sensor 340 is arranged between the cooling device and the filter 330. When the number of charging guns 800 used increases, the corresponding flow rate of the coolant reflux will also increase, and the cooling pressure of the cooling device will also increase. The water tank 100 has to provide coolant to multiple charging guns 800, and the capacity is relatively large. Even if the coolant with insufficient heat dissipation flows into the water tank 100 at the beginning, the temperature fluctuation is not large. When the temperature of the coolant in the water tank 100 rises too much, the speed of the fan 520 and the speed of the water pump 200 are increased, and the cooling also takes a lot of time, and the cooling is relatively delayed, resulting in a reduction in the cooling efficiency of the charging gun 800.

[0080] When the flow rate of the coolant increases to a predetermined flow rate, two sets of fans 520 (for example, one set of two fans 520 located on the side of the microchannel radiator 510, and one set of two fans located at the bottom of the microchannel radiator 510) are promptly started to quickly cool down the large flow of coolant, avoid delayed cooling, and increase the efficiency and timeliness of cooling the charging gun 800. Moreover, it can avoid the situation where the two sets of fans 520 are always turned on, wasting electric energy.

[0081] Furthermore, the controller 700 is also connected to the pressure sensor 320. The controller 700 issues a liquid return abnormality alarm when the current pressure detected by the pressure sensor 320 is lower than the corresponding pressure corresponding to the start-up number and rotation speed of the water pump 200 and exceeds a predetermined pressure value. The controller 700 issues a filter 330 blockage alarm when the current flow rate detected by the flow sensor 340 is lower than the corresponding flow rate corresponding to the current pressure and exceeds a predetermined flow rate value.

[0082] Normally, the speed of the water pump 200 and the number of water pump 200 starts correspond to the current pressure detected by the pressure sensor 320. This is used as a reference, and the current pressure without abnormal conditions is recorded as the corresponding pressure. In actual operation, when the pipeline from the water pump 200 to the liquid return joint is blocked or the system is leaking, the current pressure actually tested by the pressure sensor 320 is lower than the corresponding pressure, and lower than the predetermined pressure value, indicating that the blockage or leakage is serious. At this time, an abnormal liquid return alarm is issued to facilitate relevant personnel to clear the blockage or solve the leakage in time to avoid safety hazards.

[0083] After the filter 330 has been used for a period of time, impurities will accumulate in the filter 330, causing the flow rate of the coolant to decrease. When the filter 330 is not blocked, the current pressure of the coolant detected by the pressure sensor 320 corresponds to the current flow rate detected by the flow sensor 340. The current flow rate when the filter 330 is not blocked is recorded as the corresponding flow rate. In actual operation, when the filter 330 is blocked and the flow sensor 340 detects that the coolant flow rate is lower than the corresponding pressure predetermined flow rate difference, it indicates that the blockage is serious. At this time, the filter 330 is blocked and an alarm is issued to facilitate relevant personnel to clean the filter 330 in time to avoid insufficient return of the coolant.

[0084] In some embodiments of the present invention, the centralized charging gun cooling system further includes a manifold block 610, a first connecting pipe 621, and a second connecting pipe 622. The manifold block 610 has two mutually independent first and second chambers. The first connecting pipe 621 is connected to the first chamber, and the second connecting pipe 622 is connected to the second chamber. The first chamber and the first connecting pipe 621 form a liquid outlet joint, and the second chamber and the second connecting pipe 622 form a liquid return joint.

[0085] like Figure 1 As shown, the manifold block 610 includes a first chamber and a second chamber that are independent of each other. The first chamber and the first connecting pipe 621 form a liquid outlet joint. The first chamber receives the coolant from the water pump 200, and the first connecting pipe 621 is connected to the third pipeline 410. The second chamber and the second connecting pipe 622 form a liquid return joint. The second chamber receives the coolant from the charging gun 800, and the first connecting pipe 621 is connected to the cooling device.

[0086] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A centralized charging gun cooling system, characterized in that: The centralized charging gun cooling system comprises: A water tank, the water tank being used to contain a coolant; A water pump, wherein a liquid inlet end of the water pump is connected to the water tank via a first pipeline; A liquid outlet connector, the liquid outlet connector being connected to a liquid outlet end of the water pump via a second pipeline; A plurality of third pipelines, wherein the plurality of third pipelines correspond to the plurality of charging guns one by one, a first end of each of the third pipelines being connected to the liquid outlet connector, and a second end of each of the third pipelines being connected to the charging gun via a solenoid valve to provide the cooling liquid to the charging gun; A liquid return connector, the liquid return connector is connected to a plurality of the charging guns to receive the coolant from the charging guns; A cooling device, a first end of which is connected to the liquid return joint, and a second end of which is connected to the water tank, and the cooling device is used to cool the coolant; A controller, wherein the controller is connected to the solenoid valve, the water pump and the charging gun to control the opening of the solenoid valve corresponding to the charging gun and the start of the water pump according to the use of the charging gun, The water pumps include a plurality of water pumps, the plurality of water pumps are connected to the water tank through a plurality of first pipelines, and the plurality of water pumps are connected to the liquid outlet joints through a plurality of second pipelines, The controller controls the corresponding number or proportion of the water pumps to start according to the proportion of the number of the charging guns in use to the total number of the charging guns. The charging guns include four and the water pumps include two. The controller controls the solenoid valve corresponding to the used charging gun to start, and the water pump to start according to the use of one of the four charging guns; The controller controls the two solenoid valves corresponding to the two charging guns in use, and one of the water pumps to start, according to the use of two of the four charging guns; The controller controls the three solenoid valves corresponding to the three charging guns in use to start, and the two water pumps to start, according to the use of three of the four charging guns; According to the fact that all four charging guns are in use, the controller controls the four solenoid valves corresponding to the four charging guns in use to start, and the two water pumps to start.

2. The centralized charging gun cooling system according to claim 1, characterized in that: The centralized charging gun cooling system also includes: A plurality of terminal cut-off joints, each of which corresponds to the plurality of third pipelines one by one, each of which comprises a first joint and a second joint, the second end of each of the third pipelines is connected to the solenoid valve via the first joint, and each of the charging guns is connected to the liquid return joint via the second joint.

3. The centralized charging gun cooling system according to claim 1, characterized in that: The cooling device comprises: Two microchannel radiators, the two microchannel heat exchangers are arranged facing each other and are both located below the water tank, the bottoms of the two microchannel radiators are connected to the liquid return joint, and the tops thereof are connected to the water tank; A fan is perpendicular to the microchannel radiator and is located on the side and / or bottom of the microchannel radiator.

4. The centralized charging gun cooling system according to claim 3, characterized in that: The centralized charging gun cooling system also includes: A temperature sensor, the temperature sensor is inserted into the liquid outlet joint to detect the current temperature of the coolant in the liquid outlet joint; The controller is connected to the temperature sensor, the water pump and the fan to control the rotation speeds of the fan and the water pump according to the difference between the current temperature and the predetermined temperature.

5. The centralized charging gun cooling system according to claim 4, characterized in that: The centralized charging gun cooling system also includes: A filter, the filter is connected to the liquid return joint, and the cooling device is connected to the liquid return joint through the filter; A pressure sensor is inserted into the liquid return joint to detect the current pressure of the coolant in the liquid return joint.

6. The centralized charging gun cooling system according to claim 5, characterized in that: The centralized charging gun cooling system also includes: A flow sensor, wherein a first end of the flow sensor is connected to the filter and a second end of the flow sensor is connected to the cooling device, the filter is connected to the cooling device via the flow sensor, and the flow sensor is used to detect the current flow of the coolant. The fans include two groups, and the two groups of fans are respectively arranged on the side and bottom of the microchannel radiator. The controller is connected to the flow sensor to start one of the two groups of fans according to the current flow being lower than the predetermined flow, and to start both groups of fans according to the current flow being higher than the predetermined flow.

7. The centralized charging gun cooling system according to claim 6, characterized in that: The controller is also connected to the pressure sensor. The controller issues a liquid return abnormality alarm based on the current pressure detected by the pressure sensor being lower than the corresponding pressure corresponding to the start-up number and speed of the water pump and exceeding a predetermined pressure value. The controller issues a filter blockage alarm based on the current flow detected by the flow sensor being lower than the corresponding flow corresponding to the current pressure and exceeding a predetermined flow value.

8. The centralized charging gun cooling system according to claim 1, characterized in that: The centralized charging gun cooling system also includes: A branching block, each of which has two mutually independent first and second chambers; a first connecting pipe and a second connecting pipe, wherein the first connecting pipe is connected to the first chamber, and the second connecting pipe is connected to the second chamber, The first chamber and the first connecting pipe form the liquid outlet joint, and the second chamber and the second connecting pipe form the liquid return joint.

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