Energy-saving liquid cooling heat exchange system

Abstract

The utility model discloses an energy-saving liquid cooling heat exchange system which comprises a first cooling heat exchange loop, a second cooling heat exchange loop, a third cooling heat exchange loop, a heat exchanger, a four-way valve and a main control module. The first cooling heat exchange loop comprises a first cooling heat exchange branch and a second cooling heat exchange branch, the first cooling heat exchange branch is connected with the four-way valve, and the second cooling heat exchange branch is connected with the heat exchanger; the second cooling heat exchange loop comprises a third cooling heat exchange branch and a fourth cooling heat exchange branch, and the third cooling heat exchange branch and the fourth cooling heat exchange branch are connected with the four-way valve; the fourth cooling heat exchange branch comprises a first circulating water pump and one-way valves; the one-way valves are respectively connected with two ends of the first circulating water pump; the third cooling heat exchange loop is connected with the heat exchanger; the heat exchanger is connected with the four-way valve. According to the utility model, the four-way valve is connected with the three cooling heat exchange loops, so that the purposes of energy conservation, high efficiency and reliability are realized, the temperature can be accurately controlled, and the energy consumption of the liquid cooling heat exchange system is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid cooling heat exchange systems, and in particular to an energy-saving liquid cooling heat exchange system. Background Technology

[0002] With the development of science and technology, electricity, as a clean energy source, is increasingly being used in daily life and production. This electricity requires corresponding energy storage systems for storage and subsequent application. Existing energy storage systems typically include batteries and power converters (PCS), which are indispensable components. Generally, during normal operation, the temperature of the batteries and PCS gradually increases. If they remain at high temperatures for extended periods, the efficiency, accuracy, and lifespan of the energy storage system will be significantly affected, potentially causing damage. Therefore, cooling and heat exchange systems are generally required to cool the batteries and PCS.

[0003] Modern cooling and heat exchange systems typically employ liquid cooling. These systems usually contain several cooling and heat exchange loops filled with refrigerant. However, these systems often do not consider actual cooling needs, and all of these loops operate simultaneously. This leads to excessive energy consumption, which contradicts the current trend of energy conservation and emission reduction. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides an energy-saving liquid cooling heat exchange system, which uses a four-way valve to connect three cooling heat exchange circuits to achieve energy saving, high efficiency and reliability. It has the ability to precisely control temperature and effectively reduce the energy consumption of the liquid cooling heat exchange system.

[0005] This utility model provides an energy-saving liquid cooling heat exchange system, the system including a first cooling heat exchange circuit, a second cooling heat exchange circuit, a third cooling heat exchange circuit, a heat exchanger, a four-way valve and a main control module;

[0006] The first cooling heat exchange circuit includes a first cooling heat exchange branch and a second cooling heat exchange branch. The outlet of the first cooling heat exchange branch is connected to the first valve port of the four-way valve, and the inlet of the second cooling heat exchange branch is connected to the heat exchanger.

[0007] The second cooling heat exchange circuit includes a third cooling heat exchange branch and a fourth cooling heat exchange branch. The outlet of the third cooling heat exchange branch is connected to the second valve port of the four-way valve, and the inlet of the fourth cooling heat exchange branch is connected to the third valve port of the four-way valve.

[0008] The fourth cooling heat exchange branch includes a first circulating water pump and a one-way valve. The inlet of the first circulating water pump is connected to the third valve port of the four-way valve. The one-way valve is connected to both ends of the first circulating water pump. The one-way valve is oriented from the inlet to the outlet of the fourth cooling heat exchange branch.

[0009] The inlet and outlet of the third cooling heat exchange circuit are both connected to the heat exchanger.

[0010] The heat exchanger is connected to the fourth port of the four-way valve;

[0011] The main control module is connected to the first cooling heat exchange circuit, the second cooling heat exchange circuit, the third cooling heat exchange circuit, the heat exchanger, and the four-way valve.

[0012] Furthermore, the four-way valve is a switch-change type four-way valve or a proportional regulating type four-way valve.

[0013] Furthermore, the first cooling heat exchange branch is provided with an expansion tank, a first ball valve, a replenishment tank, and a filling valve. The expansion tank and the replenishment tank contain refrigerant. The expansion tank is connected to the first cooling heat exchange branch based on the first ball valve, and the replenishment tank is connected to the first cooling heat exchange branch based on the filling valve.

[0014] Furthermore, a first return water pressure gauge and a first return water temperature gauge are installed on the first cooling heat exchange branch line;

[0015] The second cooling heat exchange branch is equipped with a first outlet water pressure gauge and a first outlet water temperature gauge;

[0016] The third cooling heat exchange branch is equipped with a second return water pressure gauge, a second return water temperature gauge, and a second outlet water temperature gauge.

[0017] A second outlet pressure gauge is installed on the fourth cooling heat exchange branch.

[0018] Furthermore, a first exhaust valve and a first safety valve are provided on the first cooling heat exchange branch line;

[0019] The second cooling heat exchange branch is equipped with a second ball valve and a third ball valve;

[0020] A second exhaust valve is provided on the third cooling heat exchange branch line;

[0021] The fourth cooling heat exchange branch is equipped with a fourth ball valve and a fifth ball valve;

[0022] An expansion valve is installed on the third cooling heat exchange circuit.

[0023] Furthermore, a radiator and a cooling fan are provided on the third cooling heat exchange branch. One end of the radiator is connected to the water inlet of the third cooling heat exchange branch, and the other end of the radiator is connected to the water outlet of the third cooling heat exchange branch. The cooling fan is located next to the radiator.

[0024] Furthermore, the third cooling heat exchange circuit is equipped with a compressor, a condenser, and a condensing fan. The compressor is connected to one end of the heat exchanger and one end of the condenser, and the condensing fan is located beside the condenser.

[0025] Furthermore, a drying filter is also provided on the third cooling heat exchange circuit, and the drying filter is connected to the other end of the condenser.

[0026] Furthermore, an electric heater and a second circulating water pump are also provided on the second cooling heat exchange branch.

[0027] This invention provides an energy-saving liquid cooling heat exchange system. It employs a four-way valve connecting three cooling heat exchange loops, while using a one-way valve on the PCS side. In low-temperature refrigeration mode, the first and third ports of the four-way valve are connected, as are the second and fourth ports. The third cooling heat exchange loop is inactive. The refrigerant from the first cooling heat exchange loop on the battery side and the refrigerant from the second cooling heat exchange loop on the PCS side are cooled and heat exchanged through heat exchangers and radiators, respectively. This effectively reduces energy consumption of the cooling heat exchange system at lower refrigeration pressures, achieving energy savings. In normal-temperature or high-temperature refrigeration modes, the first and fourth ports of the four-way valve are connected, and the third cooling heat exchange loop is inactive. The second and third valve ports are connected, allowing the first, second, and third cooling heat exchange circuits to operate simultaneously. The compressor and condenser from the third cooling heat exchange circuit assist in cooling and heat exchange, relieving the overall refrigeration pressure of the system and achieving the goals of energy saving, high efficiency, simplicity, and reliability. The system is equipped with several pressure gauges, thermometers, circulating water pumps, and valve devices to achieve precise control and has the ability to accurately control temperature. An expansion tank and a replenishment tank are provided to replenish the refrigerant in the cooling heat exchange circuits in a timely manner. A dryer filter is installed to dry the water vapor overflowing from the condenser. An electric heater is also included, providing a certain heating function. In summary, this effectively reduces the energy consumption of the liquid cooling heat exchange system. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the energy-saving liquid cooling heat exchange system architecture in Embodiment 1 of this utility model. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] In this invention, it should be understood that terms such as “comprising” or “having” are intended to indicate the presence of features, figures, steps, actions, components, portions or combinations thereof disclosed in this specification, and are not intended to exclude the possibility of the presence or addition of one or more other features, figures, steps, actions, components, portions or combinations thereof.

[0032] It should also be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Example 1

[0034] This utility model provides an energy-saving liquid cooling heat exchange system, comprising a first cooling heat exchange loop, a second cooling heat exchange loop, a third cooling heat exchange loop, a heat exchanger, a four-way valve, and a main control module. The first cooling heat exchange loop includes a first cooling heat exchange branch and a second cooling heat exchange branch. The outlet of the first cooling heat exchange branch is connected to the first valve port of the four-way valve, and the inlet of the second cooling heat exchange branch is connected to the heat exchanger. The second cooling heat exchange loop includes a third cooling heat exchange branch and a fourth cooling heat exchange branch. The outlet of the third cooling heat exchange branch is connected to the second valve port of the four-way valve, and the outlet of the third cooling heat exchange branch is connected to the second valve port of the four-way valve. The inlet of the fourth cooling heat exchange branch is connected to the third valve port of the four-way valve; the fourth cooling heat exchange branch includes a first circulating water pump and a check valve, the inlet of the first circulating water pump is connected to the third valve port of the four-way valve, the check valve is connected to both ends of the first circulating water pump, and the direction of the check valve is from the inlet to the outlet of the fourth cooling heat exchange branch; the inlet and outlet of the third cooling heat exchange circuit are both connected to the heat exchanger; the heat exchanger is connected to the fourth valve port of the four-way valve; the main control module is connected to the first cooling heat exchange circuit, the second cooling heat exchange circuit, the third cooling heat exchange circuit, the heat exchanger, and the four-way valve.

[0035] In one optional implementation of this embodiment, such as Figure 1As shown, Figure 1 The diagram shows the architecture of an energy-saving liquid cooling heat exchange system according to Embodiment 1 of this utility model. The system includes a first cooling heat exchange circuit 1, a second cooling heat exchange circuit 2, a third cooling heat exchange circuit 3, a heat exchanger 4, a four-way valve 5, and a main control module 6.

[0036] In an optional implementation of this embodiment, the first cooling heat exchange circuit 1 includes a first cooling heat exchange branch 11 and a second cooling heat exchange branch 12, wherein the inlet of the first cooling heat exchange branch 11 is connected to the outlet on the battery side, the outlet of the first cooling heat exchange branch 11 is connected to the first valve port 51 of the four-way valve 5, the inlet of the second cooling heat exchange branch 12 is connected to the heat exchanger 4, and the outlet of the second cooling heat exchange branch 12 is connected to the inlet on the battery side.

[0037] Specifically, the first cooling heat exchange circuit 1 is a cooling heat exchange circuit connected to the battery side, mainly used for cooling heat exchange of the battery.

[0038] In an optional implementation of this embodiment, the second cooling heat exchange circuit 2 includes a third cooling heat exchange branch 21 and a fourth cooling heat exchange branch 22, wherein the inlet of the third cooling heat exchange branch 21 is connected to the outlet on the PCS side, the outlet of the third cooling heat exchange branch 21 is connected to the second valve port 52 of the four-way valve 5, the inlet of the fourth cooling heat exchange branch 22 is connected to the third valve port 53 of the four-way valve 5, and the outlet of the fourth cooling heat exchange branch 22 is connected to the inlet on the PCS side.

[0039] Specifically, the second cooling heat exchange circuit 2 is a cooling heat exchange circuit connected to the PCS side, mainly used for cooling heat exchange of the PCS.

[0040] It should be noted that the PCS is a power conversion system, which is used to control the charging and discharging process of the battery and to convert AC and DC power in the energy storage system.

[0041] In an optional implementation of this embodiment, the fourth cooling heat exchange branch 22 includes a first circulating water pump 61 and a one-way valve 62. The inlet of the first circulating water pump 61 is connected to the third valve port 53 of the four-way valve 5. The water pump direction of the outlet of the first circulating water pump 61 is from the inlet of the fourth cooling heat exchange branch 22 to the outlet of the fourth cooling heat exchange branch 22. The one-way valve 62 is connected to both ends of the first circulating water pump 61, and the direction of the one-way valve 62 is from the inlet of the fourth cooling heat exchange branch 22 to the outlet.

[0042] In an optional implementation of this embodiment, the inlet and outlet of the third cooling heat exchange circuit 3 are both connected to the heat exchanger 4.

[0043] Specifically, the heat exchanger 4 is a chlorine-water plate heat exchanger with four ports. The heat exchanger is used to perform heat exchange operations on the medium flowing in the first cooling heat exchange branch 11 and the third cooling heat exchange branch 21.

[0044] In an optional implementation of this embodiment, the heat exchanger 4 is connected to the fourth valve port 54 of the four-way valve 5.

[0045] In an optional implementation of this embodiment, the main control module 6 is connected to the first cooling heat exchange circuit 1, the second cooling heat exchange circuit 2, the third cooling heat exchange circuit 3, the heat exchanger 4, and the four-way valve 5. The main control module 6 controls the operation of the first cooling heat exchange circuit 1, the second cooling heat exchange circuit 2, the third cooling heat exchange circuit 3, the heat exchanger 4, and the four-way valve 5.

[0046] Specifically, the main control module 6 can control the flow of the first cooling heat exchange circuit 1, the second cooling heat exchange circuit 2, and the third cooling heat exchange circuit 3, the opening and closing status of the heat exchanger 4, and the valve port connection status of the four-way valve 5.

[0047] In an optional implementation of this embodiment, the four-way valve 5 is a switch-change type four-way valve or a proportional regulating type four-way valve.

[0048] Specifically, the switch-type four-way valve directly controls the connection status of different valve ports through a switch, while the proportional-adjusting four-way valve uses proportional and integral calculations during operation to adjust the connection status of the valve ports based on the calculated values. Different models of four-way valves can be selected according to actual needs.

[0049] In an optional implementation of this embodiment, the first cooling heat exchange branch 11 is provided with an expansion tank 63, a first ball valve 64, a replenishment tank 65, and a filling valve 66. The expansion tank 63 and the replenishment tank 65 contain refrigerant. The expansion tank 63 is connected to the first cooling heat exchange branch 11 based on the first ball valve 64, and the replenishment tank 65 is connected to the first cooling heat exchange branch 11 based on the filling valve 66.

[0050] Specifically, the expansion tank 63 and the replenishment tank 65 are used to replenish the refrigerant in the first cooling heat exchange branch 11, and the first ball valve 64 and the filling valve 66 are switched on and off based on the control of the main control module 6.

[0051] In an optional implementation of this embodiment, a first return water pressure gauge 71 and a first return water temperature gauge 72 are provided on the first cooling heat exchange branch 11. The first return water pressure gauge 71 is used to detect the return water pressure value at the inlet of the first cooling heat exchange branch 11, and the first return water temperature gauge 72 is used to detect the return water temperature value at the inlet of the first cooling heat exchange branch 11.

[0052] In an optional implementation of this embodiment, the second cooling heat exchange branch 12 is provided with a first outlet water pressure gauge 73 and a first outlet water temperature gauge 74. The first outlet water pressure gauge 73 is used to detect the outlet water pressure value of the outlet of the second cooling heat exchange branch 12, and the first outlet water temperature gauge 74 is used to detect the outlet water temperature value of the outlet of the second cooling heat exchange branch 12.

[0053] In an optional implementation of this embodiment, the third cooling heat exchange branch 21 is provided with a second return water pressure gauge 75, a second return water temperature gauge 76, and a second outlet water temperature gauge 77. The second return water pressure gauge 75 is used to detect the return water pressure value at the inlet of the third cooling heat exchange branch 21, the second return water temperature gauge 76 is used to detect the return water temperature value at the inlet of the third cooling heat exchange branch 21, and the second outlet water temperature gauge 77 is used to detect the outlet water temperature value at the outlet of the third cooling heat exchange branch 21.

[0054] In an optional implementation of this embodiment, a second outlet pressure gauge 78 is provided on the fourth cooling heat exchange branch 22. The second outlet pressure gauge 78 is used to detect the outlet pressure value of the fourth cooling heat exchange branch 22.

[0055] In an optional implementation of this embodiment, the main control module 6 generates a corresponding control strategy by collecting pressure and temperature information obtained from the first return water pressure gauge 71, the first return water thermometer 72, the first outlet water pressure gauge 73, the first outlet water thermometer 74, the second return water pressure gauge 75, the second return water thermometer 76, and the second outlet water thermometer 77.

[0056] In an optional implementation of this embodiment, the first cooling heat exchange branch 11 is provided with a first exhaust valve 81 and a first safety valve 82, which are used to control the on / off state of the first cooling heat exchange branch 11.

[0057] In an optional implementation of this embodiment, a second ball valve 83 and a third ball valve 84 are provided on the second cooling heat exchange branch 12. The second ball valve 83 and the third ball valve 84 are used to control the on / off state of the second cooling heat exchange branch 12.

[0058] In an optional implementation of this embodiment, a second exhaust valve 85 is provided on the third cooling heat exchange branch 21, and the second exhaust valve 85 is used to control the on / off state of the third cooling heat exchange branch 21.

[0059] In an optional implementation of this embodiment, a fourth ball valve 86 and a fifth ball valve 87 are provided on the fourth cooling heat exchange branch 22, and the fourth ball valve 86 and the fifth ball valve 87 are used to control the on / off state of the fourth cooling heat exchange branch 22.

[0060] In an optional implementation of this embodiment, an expansion valve 88 is provided on the third cooling heat exchange circuit 3, and the expansion valve 88 is used to control the on / off state of the third cooling heat exchange circuit 3.

[0061] In an optional implementation of this embodiment, the main control module 6 controls the on / off status of the first exhaust valve 81, the first safety valve 82, the second ball valve 83, the third ball valve 84, the second exhaust valve 85, the fourth ball valve 86, the fifth ball valve 87, and the expansion valve 88, thereby controlling the on / off status of the first cooling heat exchange branch 11, the second cooling heat exchange branch 12, the third cooling heat exchange branch 21, the fourth cooling heat exchange branch 22, and the third cooling heat exchange circuit 3.

[0062] In an optional implementation of this embodiment, a radiator 91 and a cooling fan 92 are provided on the third cooling heat exchange branch 21. One end of the radiator 91 is connected to the water inlet of the third cooling heat exchange branch 21, and the other end of the radiator 91 is connected to the water outlet of the third cooling heat exchange branch 21. The cooling fan 92 is located beside the radiator 91.

[0063] Specifically, the radiator 91 and the cooling fan 92 are used to dissipate heat and cool the refrigerant from the PCS side in the third cooling circuit 21.

[0064] In an optional implementation of this embodiment, the third cooling heat exchange circuit 3 is provided with a compressor 93, a condenser 94 and a condensing fan 95. The compressor 91 is connected to one end of the heat exchanger 4 and the condenser 94 respectively, and the condensing fan 95 is located beside the condenser 94.

[0065] Specifically, the compressor 93, condenser 94, and condenser fan 95 are used to perform refrigeration operations on the refrigerant in the third cooling heat exchange circuit 3.

[0066] In an optional implementation of this embodiment, a drying filter 96 is further provided on the third cooling heat exchange circuit 3, and the drying filter 96 is connected to the other end of the condenser 94 and the expansion valve 88.

[0067] Specifically, the dryer filter 96 is used to dry and filter water vapor impurities flowing out of the condenser 94.

[0068] In an optional implementation of this embodiment, the second cooling heat exchange branch 12 is further provided with an electric heater 97 and a second circulating water pump 98. The electric heater 97 is connected to one end of the third ball valve 84 and the second circulating water pump 98, respectively. The other end of the second circulating water pump 98 is connected to the second ball valve 83. The flow direction of the second circulating water pump 98 is from the inlet to the outlet of the second cooling heat exchange branch 12.

[0069] In summary, Embodiment 1 of this utility model provides an energy-saving liquid cooling heat exchange system. It employs a four-way reversing valve to connect three cooling heat exchange circuits, while using a one-way valve on the PCS side. In low-temperature refrigeration mode, the four-way valve is not energized, and the third cooling heat exchange circuit is inactive. The refrigerant from the first cooling heat exchange circuit on the battery side and the refrigerant from the second cooling heat exchange circuit on the PCS side are cooled and heat exchanged through the first heat exchanger and radiator, respectively. This reduces system energy consumption and achieves energy saving when the refrigeration pressure is low. In normal-temperature or high-temperature refrigeration modes, the four-way valve is energized, and the first, second, and third cooling heat exchange circuits operate simultaneously. The condenser from the third cooling heat exchange circuit assists in cooling and heat exchange, alleviating the overall refrigeration pressure of the system and achieving energy saving, high efficiency, simplicity, and reliability. The system includes several pressure gauges, thermometers, a circulating water pump, and a valve body structure to achieve precise control and temperature control, effectively reducing the energy consumption of the liquid cooling heat exchange system.

[0070] The above provides a detailed description of an energy-saving liquid cooling heat exchange system provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An energy-saving liquid cooling heat exchange system, characterized in that, The system includes a first cooling heat exchange circuit, a second cooling heat exchange circuit, a third cooling heat exchange circuit, a heat exchanger, a four-way valve, and a main control module; The first cooling heat exchange circuit includes a first cooling heat exchange branch and a second cooling heat exchange branch. The outlet of the first cooling heat exchange branch is connected to the first valve port of the four-way valve, and the inlet of the second cooling heat exchange branch is connected to the heat exchanger. The second cooling heat exchange circuit includes a third cooling heat exchange branch and a fourth cooling heat exchange branch. The outlet of the third cooling heat exchange branch is connected to the second valve port of the four-way valve, and the inlet of the fourth cooling heat exchange branch is connected to the third valve port of the four-way valve. The fourth cooling heat exchange branch includes a first circulating water pump and a one-way valve. The inlet of the first circulating water pump is connected to the third valve port of the four-way valve. The one-way valve is connected to both ends of the first circulating water pump. The one-way valve is oriented from the inlet to the outlet of the fourth cooling heat exchange branch. The inlet and outlet of the third cooling heat exchange circuit are both connected to the heat exchanger. The heat exchanger is connected to the fourth port of the four-way valve; The main control module is connected to the first cooling heat exchange circuit, the second cooling heat exchange circuit, the third cooling heat exchange circuit, the heat exchanger, and the four-way valve.

2. The energy-saving liquid cooling heat exchange system as described in claim 1, characterized in that, The four-way valve is either a switch-change type four-way valve or a proportional regulating type four-way valve.

3. The energy-saving liquid cooling heat exchange system as described in claim 1, characterized in that, An expansion tank, a first ball valve, a replenishment tank, and a filling valve are provided on the first cooling heat exchange branch. The expansion tank and the replenishment tank contain refrigerant. The expansion tank is connected to the first cooling heat exchange branch via the first ball valve, and the replenishment tank is connected to the first cooling heat exchange branch via the filling valve.

4. The energy-saving liquid cooling heat exchange system as described in claim 1, characterized in that, The first return water pressure gauge and the first return water temperature gauge are installed on the first cooling heat exchange branch line; The second cooling heat exchange branch is equipped with a first outlet water pressure gauge and a first outlet water temperature gauge; The third cooling heat exchange branch is equipped with a second return water pressure gauge, a second return water temperature gauge, and a second outlet water temperature gauge. A second outlet pressure gauge is installed on the fourth cooling heat exchange branch.

5. The energy-saving liquid cooling heat exchange system as described in claim 1, characterized in that, The first cooling heat exchange branch is equipped with a first exhaust valve and a first safety valve; The second cooling heat exchange branch is equipped with a second ball valve and a third ball valve; A second exhaust valve is provided on the third cooling heat exchange branch line; The fourth cooling heat exchange branch is equipped with a fourth ball valve and a fifth ball valve; An expansion valve is installed on the third cooling heat exchange circuit.

6. The energy-saving liquid cooling heat exchange system as described in claim 1, characterized in that, A radiator and a cooling fan are provided on the third cooling heat exchange branch. One end of the radiator is connected to the water inlet of the third cooling heat exchange branch, and the other end of the radiator is connected to the water outlet of the third cooling heat exchange branch. The cooling fan is located next to the radiator.

7. The energy-saving liquid cooling heat exchange system as described in claim 1, characterized in that, The third cooling heat exchange circuit is equipped with a compressor, a condenser and a condensing fan. The compressor is connected to one end of the heat exchanger and one end of the condenser, and the condensing fan is located next to the condenser.

8. The energy-saving liquid cooling heat exchange system as described in claim 7, characterized in that, A drying filter is also provided on the third cooling heat exchange circuit, and the drying filter is connected to the other end of the condenser.

9. The energy-saving liquid cooling heat exchange system as described in claim 1, characterized in that, An electric heater and a second circulating water pump are also provided on the second cooling heat exchange branch.

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