Liquid cooling system

Abstract

The invention discloses a liquid cooling system which comprises a heat exchange unit which comprises a cold side and a hot side. The primary side pipeline comprises a first pipeline and a second pipeline, a first electromagnetic valve is arranged on the first pipeline, and a first one-way valve is arranged on the second pipeline; the secondary side pipeline comprises a third pipeline and a fourth pipeline, a second electromagnetic valve is arranged on the third pipeline, and a second one-way valve is arranged on the fourth pipeline; a third electromagnetic valve is arranged on the fifth pipeline; a fourth electromagnetic valve is arranged on the sixth pipeline. According to application scenes, communication or isolation of the primary side and the secondary side can be achieved by controlling opening and closing of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve, on one hand, working medium mixed flow of the primary side and the secondary side can be avoided, and on the other hand, the heat exchange efficiency can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of equipment cooling, in particular to a liquid cooling system. Background Art

[0002] At present, CDU in the liquid cooling industry generally isolates the primary and secondary sides through an intermediate heat exchanger. The secondary side working fluid passes through the intermediate heat exchanger (generally an integral heat exchange unit or a detachable heat exchange unit) and is cooled by the primary side working fluid through a partition heat exchange method, and then circulates to the server cold plate to cool the heating equipment in the data center. The primary side working fluid enters the dry cooler or cooling tower, is cooled, and then circulates to the heat exchange unit to cool the secondary side working fluid.

[0003] Although this type of CDU can avoid mixing of the working fluids on the primary and secondary sides, it is not suitable for application scenarios where the working fluids of data center equipment can be directly sent to terminal heat dissipation devices (such as dry coolers or cooling towers). In such scenarios, the CDU equipment must perform an additional heat exchange, which reduces the heat exchange efficiency. Summary of the invention

[0004] The object of the present invention is to provide a liquid cooling system to solve the technical problem that the prior art cannot control whether the primary side and the secondary side are isolated according to the application scenario.

[0005] The present invention provides a liquid cooling system, comprising: a heat exchange unit, the heat exchange unit comprising a cold side and a hot side; A primary side pipeline, comprising a first pipeline and a second pipeline, wherein the outlet end of the first pipeline is connected to the cold side inlet end of the heat exchange unit, and the outlet end of the cold side of the heat exchange unit is connected to the inlet end of the second pipeline, a first solenoid valve is provided on the first pipeline, and a first check valve is provided on the second pipeline, wherein the first check valve is used to control the fluid to flow from the outlet end of the cold side of the heat exchange unit to the inlet end of the second pipeline; A secondary side pipeline, comprising a third pipeline and a fourth pipeline, wherein the outlet end of the third pipeline is connected to the hot side inlet end of the heat exchange unit, and the outlet end of the hot side of the heat exchange unit is connected to the inlet end of the fourth pipeline, a second solenoid valve is provided on the third pipeline, and a second one-way valve is provided on the fourth pipeline, wherein the second one-way valve is used to control the fluid to flow from the outlet end of the hot side of the heat exchange unit to the inlet end of the fourth pipeline; a fifth pipeline, one end of which is connected to the first pipeline, the other end of which is connected to the fourth pipeline, and a third solenoid valve is provided on the fifth pipeline; A sixth pipeline, one end of the sixth pipeline is connected to the second pipeline, the other end of the sixth pipeline is connected to the third pipeline, and a fourth solenoid valve is provided on the sixth pipeline.

[0006] A liquid cooling system as described above, wherein, preferably, the connection between the fifth pipeline and the first pipeline forms a first connection point, the connection between the fifth pipeline and the fourth pipeline forms a second connection point, the first solenoid valve is located between the first connection point and the inlet end of the cold side of the heat exchange unit, and the second one-way valve is located between the outlet end of the hot side of the heat exchange unit and the second connection point.

[0007] A liquid cooling system as described above, wherein, preferably, the connection between the sixth pipeline and the second pipeline forms a third connection point, the connection between the sixth pipeline and the third pipeline forms a fourth connection point, the first one-way valve is located between the outlet end of the cold side of the heat exchange unit and the third connection point, and the second solenoid valve is located between the fourth connection point and the inlet end of the hot side of the heat exchange unit.

[0008] A liquid cooling system as described above, wherein preferably, the liquid cooling system also includes a fluid replenishment unit, the fluid replenishment unit is used to replenish fluid for the liquid cooling system, the fluid replenishment unit includes a first fluid replenishment part and a second fluid replenishment part, the first fluid replenishment part is connected to the fourth pipeline, and the second fluid replenishment part is connected to the first fluid replenishment part. A liquid cooling system as described above, wherein preferably, the first fluid replenishment part includes a fluid replenishment tank, a first fluid replenishment pump and a seventh pipeline, one end of the seventh pipeline is connected to the fluid replenishment tank, the other end of the seventh pipeline is connected to the fourth pipeline, and the first fluid replenishment pump is arranged on the seventh pipeline.

[0009] A liquid cooling system as described above, wherein preferably, the second fluid replenishment part includes a second fluid replenishment pump, an eighth pipeline and a quick-connect connector, one end of the eighth pipeline is connected to the quick-connect connector, the other end of the eighth pipeline is connected to the seventh pipeline, the second fluid replenishment pump is arranged on the eighth pipeline, and the quick-connect connector is used to connect the fluid replenishment device.

[0010] A liquid cooling system as described above, wherein preferably, the liquid cooling system further includes a ninth pipeline, one end of the ninth pipeline is connected to the third pipeline, the other end of the ninth pipeline is connected to the fourth pipeline, and an electric two-way valve is provided on the ninth pipeline.

[0011] In a liquid cooling system as described above, preferably, a fifth connection point is formed at the connection between the ninth pipeline and the fourth pipeline, a first filter is provided on the fourth pipeline, and the first filter is located between the fifth connection point and the outlet end of the fourth pipeline.

[0012] In the liquid cooling system as described above, preferably, a second filter is further provided on the first pipeline.

[0013] In the liquid cooling system as described above, preferably, the inlet end of the first pipeline, the outlet end of the second pipeline, the inlet end of the third pipeline and the outlet end of the fourth pipeline are all provided with temperature and pressure sensors. Compared with the prior art, the present invention can achieve connectivity or isolation between the primary side and the secondary side by controlling the opening and closing of the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve according to the applicable scenario. On the one hand, it can avoid mixing of the working fluid on the primary side and the secondary side, and on the other hand, it can effectively improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the liquid cooling system provided by an embodiment of the present invention.

[0015] Description of reference numerals: 10-heat exchange unit, 11-cold side, 12-hot side; 20-primary side pipeline, 21-first pipeline, 22-second pipeline, 23-first solenoid valve, 24-first one-way valve, 25-second filter; 30-secondary side pipeline, 31-third pipeline, 32-fourth pipeline, 33-second solenoid valve, 34-second one-way valve, 35-first filter, 36-circulation pump, 37-pressure sensor; 40-fifth pipeline, 41-third solenoid valve; 50-sixth pipeline, 51-fourth solenoid valve; 60-liquid infusion unit, 61-first liquid infusion part, 611-liquid infusion tank, 612-first liquid infusion pump, 613-seventh pipeline, 62-second liquid infusion part, 621-second liquid infusion pump, 622-eighth pipeline, 623-quick plug connector; 70-ninth pipeline, 71-electric two-way valve; 80-temperature and pressure sensor; L1-first connection point, L2-second connection point, L3-third connection point, L4-fourth connection point, L5-fifth connection point. DETAILED DESCRIPTION

[0016] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as limiting the present invention.

[0017] Reference Figure 1 As shown, the present invention provides a liquid cooling system, including a heat exchange unit 10, a primary side pipeline 20, a secondary side pipeline 30, a fifth pipeline 40 and a sixth pipeline 50, wherein: The heat exchange unit 10 includes a cold side 11 and a hot side 12. When two working fluids of different temperatures pass through the heat exchange unit 10, heat is transferred from the high-temperature working fluid to the low-temperature working fluid, thereby realizing the transfer of thermal energy. Optionally, the heat exchange unit 10 is a plate heat exchanger, and other partition-type heat exchangers can also be used to realize the transfer of thermal energy, which is not limited here.

[0018] The primary side pipeline 20 is a cold source side pipeline, which is a flow pipeline for low-temperature working fluid. The primary side pipeline 20 includes a first pipeline 21 and a second pipeline 22. The outlet end of the first pipeline 21 is connected to the inlet end of the cold side 11 of the heat exchange unit 10, and the outlet end of the cold side 11 of the heat exchange unit 10 is connected to the inlet end of the second pipeline 22. The low-temperature working fluid enters the cold side 11 of the heat exchange unit 10 from the first pipeline 21, and heats up with the hot side 12 of the heat exchange unit 10 after heat exchange. After the heated working fluid flows out through the second pipeline 22, it is sent to a cooling device (such as a dry cooler, a cooling tower, etc.) for cooling, and then circulates to the first pipeline 21, thereby realizing a circulating cooling process of the working fluid.

[0019] The secondary side pipeline 30 is a load side pipeline, which is a flow pipeline for high-temperature working medium. The secondary side pipeline 30 includes a third pipeline 31 and a fourth pipeline 32. The outlet end of the third pipeline 31 is connected to the inlet end of the hot side 12 of the heat exchange unit 10, and the outlet end of the hot side 12 of the heat exchange unit 10 is connected to the inlet end of the fourth pipeline 32. The high-temperature working medium enters the hot side 12 of the heat exchange unit 10 through the third pipeline 31, exchanges heat with the cold side 11 of the heat exchange unit 10 and is cooled. The cooled working medium flows to the load through the fourth pipeline 32 to cool the load equipment.

[0020] In order to be applicable to different scenarios, the liquid cooling system of the present application needs to be able to achieve communication and isolation between the primary side and the secondary side. In the embodiment provided in the present application, a first solenoid valve 23 is provided on the first pipeline 21, and a first one-way valve 24 is provided on the second pipeline 22. The first one-way valve 24 is used to control the working fluid to flow only from the outlet end of the cold side 11 of the heat exchange unit 10 to the inlet end of the second pipeline 22, so as to achieve one-way flow of the working fluid in the primary side pipeline 20. A second solenoid valve 33 is provided on the third pipeline 31, and a second one-way valve 34 is provided on the fourth pipeline 32. One-way valve 34, the second one-way valve 34 is used to control the working fluid to flow only from the outlet end of the hot side 12 of the heat exchange unit 10 to the inlet end of the fourth pipeline 32, so as to realize the one-way flow of the working fluid in the secondary side pipeline 30, one end of the fifth pipeline 40 is connected to the first pipeline 21, and the other end of the fifth pipeline 40 is connected to the fourth pipeline 32, and the fifth pipeline 40 is provided with a third solenoid valve 41, one end of the sixth pipeline 50 is connected to the second pipeline 22, and the other end of the sixth pipeline 50 is connected to the third pipeline 31, and the sixth pipeline 50 is provided with a fourth solenoid valve 51.

[0021] When the primary side pipeline 20 and the secondary side pipeline 30 need to be isolated, the first solenoid valve 23 and the second solenoid valve 33 are opened, and the third solenoid valve 41 and the fourth solenoid valve 51 are closed. The low-temperature working medium on the cold source side flows from the first pipeline 21 to the cold side 11 of the heat exchange unit 10 via the first solenoid valve 23, and the high-temperature working medium on the load side flows from the third pipeline 31 to the hot side 12 of the heat exchange unit 10 via the second solenoid valve 33. After the low-temperature working medium and the high-temperature working medium exchange heat in the heat exchange unit 10, the low-temperature working medium is heated up and flows from the second pipeline 22 to the cooling device, and the high-temperature working medium is cooled and flows from the fourth pipeline 32 to the load equipment to dissipate heat from the load equipment.

[0022] When the primary side pipeline 20 and the secondary side pipeline 30 do not need to be isolated, the third solenoid valve 41 and the fourth solenoid valve 51 are opened, and the first solenoid valve 23 and the second solenoid valve 33 are closed. The working fluid flowing into the first pipeline 21 flows out from the fourth pipeline 32 through the third solenoid valve 41 under the restriction of the first one-way valve 24, and the working fluid flowing into the third pipeline 31 flows out from the second pipeline 22 through the fourth solenoid valve 51 under the restriction of the second one-way valve 34. Due to the guiding effect of the first one-way valve 24 and the second one-way valve 34, the working fluid cannot enter the heat exchange unit 10, thereby avoiding the occurrence of working fluid mixing. The high-temperature working fluid in the third pipeline 31 is sent to the cooling device through the second pipeline 22, and the low-temperature working fluid after cooling flows from the first pipeline 21 to the fourth pipeline 32, dissipating heat and cooling the device, thereby realizing the circulation of the working fluid.

[0023] In order to enable the four solenoid valves and two one-way valves to accurately realize their respective functions, the positions of the four solenoid valves and two one-way valves need to be set. Figure 1 As shown, in the embodiment provided by the present application, the connection between the fifth pipeline 40 and the first pipeline 21 forms a first connection point L1, and the connection between the fifth pipeline 40 and the fourth pipeline 32 forms a second connection point L2. The first solenoid valve 23 is located between the first connection point L1 and the inlet end of the cold side 11 of the heat exchange unit 10, and the second one-way valve 34 is located between the hot outlet end of the heat exchange unit 10 and the second connection point L2. When the primary side pipeline 20 and the secondary side pipeline 30 do not need to be isolated and the first solenoid valve 23 is closed, under the guiding action of the second one-way valve 34, the working fluid flowing in from the first pipeline 21 can only flow to the fourth pipeline 32 via the third solenoid valve 41 to prevent the working fluid from flowing into the heat exchange unit 10.

[0024] Similarly, the connection between the sixth pipeline 50 and the second pipeline 22 forms a third connection point L3, and the connection between the sixth pipeline 50 and the third pipeline 31 forms a fourth connection point L4. The first one-way valve 24 is located between the outlet end of the cold side 11 of the heat exchange unit 10 and the third connection point L3, and the second solenoid valve 33 is located between the fourth connection point L4 and the inlet end of the hot side 12 of the heat exchange unit 10. When the primary side pipeline 20 and the secondary side pipeline 30 do not need to be isolated and the second solenoid valve 33 is closed, under the guiding action of the second one-way valve 34, the working fluid flowing in from the third pipeline 31 can only flow to the second pipeline 22 through the fourth solenoid valve 51 to prevent the working fluid from flowing into the heat exchange unit 10, thereby avoiding the mixing of the working fluid in the primary side pipeline 20 and the secondary side pipeline 30.

[0025] During the daily operation and maintenance of the liquid cooling system, it is necessary to replenish the system with liquid (replenish water or liquid such as coolant), so the liquid cooling system of the present application also includes a liquid replenishing unit 60, which can replenish the system with working fluid in time so that the liquid cooling system can quickly enter the operating state. The liquid replenishing unit 60 includes a first liquid replenishing part 61 and a second liquid replenishing part 62, the first liquid replenishing part 61 is connected to the fourth pipeline 32, and the second liquid replenishing part 62 is connected to the first liquid replenishing part 61.

[0026] In the embodiment provided in the present application, the first liquid replenishing part 61 includes a liquid replenishing tank 611, a first liquid replenishing pump 612 and a seventh pipeline 613, one end of the seventh pipeline 613 is connected to the liquid replenishing tank 611, the other end of the seventh pipeline 613 is connected to the fourth pipeline 32, and the first liquid replenishing pump 612 is arranged on the seventh pipeline 613. The liquid replenishing tank 611 is used to store the working fluid, and when the coolant of the liquid cooling system is insufficient, the first liquid replenishing pump 612 provides power to transport the working fluid in the liquid replenishing tank 611 from the seventh pipeline 613 to the fourth pipeline 32 to replenish the working fluid for the system.

[0027] When the first solenoid valve 23 and the second solenoid valve 33 are closed, the third solenoid valve 41 and the fourth solenoid valve 51 are opened, and the primary side pipeline 20 and the secondary side pipeline 30 do not need to be isolated, the liquid cooling system can dissipate heat for the heat-generating equipment of a single cabinet. If the system is initially filled with working fluid, the second liquid replenishing part 62 can be used to enable the liquid cooling system to quickly enter the operating state. The second liquid replenishing part 62 includes a second liquid replenishing pump 621, an eighth pipeline 622 and a quick connector 623. The quick connector 623 can be externally connected to a large-capacity liquid replenishing device. One end of the eighth pipeline 622 is connected to the quick connector 623, and the other end of the eighth pipeline 622 is connected to the seventh pipeline 613. The second liquid replenishing pump 621 is arranged on the eighth pipeline 622. When the working fluid is first filled, the second replenishing pump 621 is turned on. Under the action of the power provided by the second replenishing pump 621, the working fluid in the external replenishing device enters the seventh pipeline 613 from the eighth pipeline 622 and then flows to the fourth pipeline 32, so as to quickly replenish the liquid cooling system. Specifically, for the CDU unit, a circulation pump 36 is provided on the fourth pipeline 32. After the second replenishing pump 621 is turned on, the external replenishing device continues to replenish the liquid cooling system. When the system pressure is ≥ P1 (0.5-1.5 bar), the second replenishing pump 621 is turned off, and the CDU unit enters the operating state. When the system pressure of the CDU unit drops during operation, the pressure at the inlet of the circulation pump 36 is ≤ P2 (0.2-0.8 bar), the working fluid needs to be replenished, and the first replenishing pump 612 is turned on. Pressure sensors 37 are provided at the inlet and outlet of the circulation pump 36. The pressure sensors 37 detect the pressure at the inlet and outlet of the circulation pump 36 so as to replenish the working fluid to the liquid cooling system in time, thereby ensuring the normal operation of the system.

[0028] In addition to the initial filling of the working fluid, the system needs to be replenished through an external fluid replenishing device. When a large amount of leakage occurs in the system, the working fluid can also be quickly replenished to the system using an external fluid replenishing device, so that the liquid cooling system can quickly return to operation in the shortest possible time.

[0029] Reference Figure 1 As shown, in the embodiment provided by the present application, the liquid cooling system further includes a ninth pipeline 70, one end of the ninth pipeline 70 is connected to the third pipeline 31, and the other end of the ninth pipeline 70 is connected to the fourth pipeline 32, and an electric two-way valve 71 is provided on the ninth pipeline 70. The ninth pipeline 70 is a bypass pipeline. For different load devices, the flow rate of the cooling medium required for heat dissipation is different. A bypass pipeline is provided in the secondary side pipeline 30, and an electric two-way valve 71 is provided on the bypass pipeline. By controlling the opening and closing of the electric two-way valve, the flow rate of the cooling medium of different load devices can be controlled to improve the adaptability of the liquid cooling system to different load devices.

[0030] The cleanliness of the working fluid has a certain influence on the cooling effect. In order to ensure that the liquid cooling system has a stable cooling effect, the working fluid in the pipeline needs to be filtered and impurities removed. In the embodiment provided in the present application, a fifth connection point L5 is formed at the connection between the ninth pipeline 70 and the fourth pipeline 32. A first filter 35 is provided on the fourth pipeline 32. The first filter 35 is located between the fifth connection point L5 and the outlet end of the fourth pipeline 32. Whether it is the low-temperature working fluid after heat exchange in the heat exchange unit 10 or the working fluid directly flowing out of the bypass pipeline, it must be filtered by the first filter 35 before it can flow from the fourth pipeline 32 to the load equipment, thereby making the working fluid used for heat dissipation and cooling have a better cooling effect.

[0031] Furthermore, the working fluid in the primary side pipeline 20 also needs to be filtered and impurities removed to ensure the cooling effect of the working fluid on the cooling side. Therefore, a second filter 25 is set on the first pipeline 21. The working fluid flowing through the first pipeline 21 is filtered by the second filter 25 and then enters the heat exchange unit 10 for heat exchange or directly flows to the fourth pipeline 32, both of which can have a good cooling effect.

[0032] In order to ensure the stability and safety of the operation of the liquid cooling system, temperature and pressure sensors 80 are provided at the inlet end of the first pipeline 21, the outlet end of the second pipeline 22, the outlet end of the third pipeline 31 and the outlet end of the fourth pipeline 32. Through the action of the temperature and pressure sensors 80 at four locations, the temperature and pressure of the low-temperature working fluid on the primary side, the high-temperature working fluid after heat exchange, and the high-temperature working fluid on the secondary side, and the low-temperature working fluid after heat exchange are monitored in real time. By detecting these data, it is possible to understand in real time whether the cooling working fluid of the liquid cooling system meets the required cooling requirements and whether the load equipment can be effectively cooled. When the detected data does not meet the requirements, the system can be adjusted so that the liquid cooling system can achieve a good heat dissipation effect.

[0033] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A liquid cooling system, characterized in that: include: a heat exchange unit, the heat exchange unit comprising a cold side and a hot side; A primary side pipeline, comprising a first pipeline and a second pipeline, wherein the outlet end of the first pipeline is connected to the cold side inlet end of the heat exchange unit, and the outlet end of the cold side of the heat exchange unit is connected to the inlet end of the second pipeline, a first solenoid valve is provided on the first pipeline, and a first check valve is provided on the second pipeline, wherein the first check valve is used to control the fluid to flow from the outlet end of the cold side of the heat exchange unit to the inlet end of the second pipeline; A secondary side pipeline, comprising a third pipeline and a fourth pipeline, wherein the outlet end of the third pipeline is connected to the hot side inlet end of the heat exchange unit, and the outlet end of the hot side of the heat exchange unit is connected to the inlet end of the fourth pipeline, a second solenoid valve is provided on the third pipeline, and a second one-way valve is provided on the fourth pipeline, wherein the second one-way valve is used to control the fluid to flow from the outlet end of the hot side of the heat exchange unit to the inlet end of the fourth pipeline; a fifth pipeline, one end of which is connected to the first pipeline, the other end of which is connected to the fourth pipeline, and a third solenoid valve is provided on the fifth pipeline; A sixth pipeline, one end of the sixth pipeline is connected to the second pipeline, the other end of the sixth pipeline is connected to the third pipeline, and a fourth solenoid valve is provided on the sixth pipeline.

2. The liquid cooling system according to claim 1, characterized in that: The connection between the fifth pipeline and the first pipeline forms a first connection point, the connection between the fifth pipeline and the fourth pipeline forms a second connection point, the first solenoid valve is located between the first connection point and the inlet end of the cold side of the heat exchange unit, and the second one-way valve is located between the outlet end of the hot side of the heat exchange unit and the second connection point.

3. The liquid cooling system according to claim 1, characterized in that: The connection between the sixth pipeline and the second pipeline forms a third connection point, the connection between the sixth pipeline and the third pipeline forms a fourth connection point, the first one-way valve is located between the outlet end of the cold side of the heat exchange unit and the third connection point, and the second solenoid valve is located between the fourth connection point and the inlet end of the hot side of the heat exchange unit.

4. The liquid cooling system according to claim 1, characterized in that: The liquid cooling system also includes a liquid replenishing unit, which is used to replenish liquid for the liquid cooling system. The liquid replenishing unit includes a first liquid replenishing part and a second liquid replenishing part. The first liquid replenishing part is connected to the fourth pipeline, and the second liquid replenishing part is connected to the first liquid replenishing part.

5. The liquid cooling system according to claim 4, characterized in that: The first fluid replenishment unit includes a fluid replenishment tank, a first fluid replenishment pump and a seventh pipeline, one end of the seventh pipeline is connected to the fluid replenishment tank, the other end of the seventh pipeline is connected to the fourth pipeline, and the first fluid replenishment pump is arranged on the seventh pipeline.

6. The liquid cooling system according to claim 5, characterized in that: The second fluid infusion part includes a second fluid infusion pump, an eighth pipeline and a quick-connect connector, one end of the eighth pipeline is connected to the quick-connect connector, the other end of the eighth pipeline is connected to the seventh pipeline, the second fluid infusion pump is arranged on the eighth pipeline, and the quick-connect connector is used to connect the fluid infusion device.

7. The liquid cooling system according to claim 1, characterized in that: The liquid cooling system further includes a ninth pipeline, one end of which is connected to the third pipeline, and the other end of which is connected to the fourth pipeline. An electric two-way valve is provided on the ninth pipeline.

8. The liquid cooling system according to claim 7, characterized in that: A fifth connection point is formed at the connection between the ninth pipeline and the fourth pipeline. A first filter is provided on the fourth pipeline. The first filter is located between the fifth connection point and the outlet end of the fourth pipeline.

9. The liquid cooling system according to claim 1, characterized in that: The first pipeline is also provided with a second filter.

10. The liquid cooling system according to claim 1, characterized in that: The inlet end of the first pipeline, the outlet end of the second pipeline, the inlet end of the third pipeline and the outlet end of the fourth pipeline are all provided with temperature and pressure sensors.

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