Drainage device, control method thereof and liquid cooling system

Abstract

The application belongs to the technical field of liquid cooling products, and provides a liquid draining device, a control method thereof and a liquid cooling system. The liquid draining device is applied to the liquid cooling system, and the liquid cooling system comprises a primary side loop and a secondary side loop. The liquid draining device comprises a draining unit and a drying unit connected between the primary side loop and the secondary side loop. The draining unit is used for draining the cooling liquid in the primary side loop and the secondary side loop. The drying unit is used for drying the cooling liquid in the primary side loop and the secondary side loop which is not drained by the draining unit. The liquid draining device can drain and dry the primary side loop and the secondary side loop of the liquid cooling system, and can ensure that the cooling liquid in the primary side loop and the secondary side loop is completely drained.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of liquid cooling products, and particularly relates to a liquid draining device, a control method thereof and a liquid cooling system. BACKGROUND

[0002] The commonly used cooling liquid in the liquid cooling system, such as the aqueous solution prepared by ethylene glycol, propylene glycol and the like, or some special fluorinated liquid, has a limited service life. This is because the cooling liquid will be affected by various factors during long-term use, thereby causing its performance to gradually decrease. Therefore, in order to ensure the normal operation of the liquid cooling system and the reliability of the equipment, the cooling liquid needs to be replaced regularly. In addition, during the transportation of the liquid cooling equipment, the equipment may be subjected to external forces such as vibration and inclination, and if the cooling liquid is retained in the equipment, it may cause the cooling liquid to leak, which not only pollutes the transportation equipment and the surrounding environment, but also may damage the equipment itself. Therefore, before the liquid cooling equipment is transported, the cooling liquid in the equipment needs to be drained to ensure the safety of the transportation process and the integrity of the equipment.

[0003] At present, when the cooling liquid is replaced regularly or the liquid cooling equipment is transported, the cooling liquid is usually drained through the drain port provided in the liquid cooling system. However, in actual application, due to the complex structure of the liquid cooling system, which includes numerous pipelines, radiators, coolers and other components, the cooling liquid will form various dead angles and stagnation areas in these components, so it is usually difficult to completely drain all the cooling liquid in the system through the system drain port. SUMMARY

[0004] In order to overcome the problems in the related art, the present application provides a liquid draining device, a control method thereof and a liquid cooling system, to solve the problem that it is difficult to completely drain the cooling liquid in the liquid cooling system.

[0005] The present application is realized by the following technical solutions:

[0006] In a first aspect, the present application provides a liquid draining device applied to a liquid cooling system, wherein the liquid cooling system comprises a primary side circuit and a secondary side circuit; and the liquid draining device comprises:

[0007] a draining unit connected between the primary side circuit and the secondary side circuit, configured to drain the cooling liquid in the primary side circuit and the secondary side circuit;

[0008] a drying unit connected between the primary side circuit and the secondary side circuit, configured to dry the cooling liquid in the primary side circuit and the secondary side circuit which is not completely drained by the draining unit.

[0009] In some embodiments, the liquid cooling system further comprises a plate heat exchanger, the plate heat exchanger comprising a cold medium pipeline and a hot medium pipeline; the primary side circuit comprises a primary side pipeline and the cold medium pipeline, and the secondary side circuit comprises a secondary side pipeline and the hot medium pipeline; the drainage unit is connected to the primary side pipeline and the secondary side pipeline respectively; and the drying unit is connected to the primary side pipeline and the secondary side pipeline respectively.

[0010] In some embodiments, the primary side circuit comprises a primary side liquid outlet, a primary side gas inlet and a first air vent; the secondary side circuit comprises a secondary side liquid outlet, a secondary side gas inlet and a second air vent; the drainage unit comprises a first liquid outlet valve and a second liquid outlet valve, the first liquid outlet valve being connected to the primary side liquid outlet, and the second liquid outlet valve being connected to the secondary side liquid outlet; and the drying unit comprises a first gas inlet valve, a second gas inlet valve and a drying gas, the first gas inlet valve being connected to the primary side gas inlet, the second gas inlet valve being connected to the secondary side gas inlet, and the drying gas being used to dry the cooling liquid in the primary side circuit and the secondary side circuit which is not drained by the drainage unit.

[0011] In some embodiments, the drainage unit further comprises a liquid storage tank and a first gas-liquid pump; the drying unit further comprises the first gas-liquid pump and a first gas storage tank; the first gas storage tank is provided with a heating resistance wire for heating the gas in the first gas storage tank; the inlet of the first gas-liquid pump is connected to the outlet of the first liquid outlet valve, the outlet of the second liquid outlet valve and the first gas storage tank respectively; the outlet of the first gas-liquid pump is connected to the inlet of the first gas inlet valve, the inlet of the second gas inlet valve and the liquid storage tank respectively; the drainage unit further comprises a first gas tank valve arranged at the outlet end of the first gas storage tank and a liquid storage tank valve arranged at the inlet end of the liquid storage tank.

[0012] In some embodiments, when the first liquid outlet valve and the liquid storage tank valve are opened, and the first gas inlet valve, the second gas inlet valve, the second liquid outlet valve and the first gas tank valve are closed, the cooling liquid in the primary side circuit flows into the drainage unit and is pumped into the liquid storage tank by the first gas-liquid pump.

[0013] In some embodiments, when the first air vent, the first gas inlet valve and the first gas tank valve are opened, and the second gas inlet valve, the liquid storage tank valve, the first liquid outlet valve and the second liquid outlet valve are closed, the heated gas in the first gas storage tank is filled into the primary side circuit by the first gas-liquid pump to dry the cooling liquid which is not drained in the primary side circuit.

[0014] When the second liquid discharge valve and the liquid tank valve are opened, and the first gas charging valve, the second gas charging valve, the first liquid discharge valve and the first gas tank valve are closed, the cooling liquid in the secondary side circuit flows into the drainage unit and is pumped into the liquid tank by the first gas-liquid pump.

[0015] When the second vent, the second gas charging valve and the first gas tank valve are opened, and the first gas charging valve, the liquid tank valve, the first liquid discharge valve and the second liquid discharge valve are closed, the heated gas in the first gas tank is charged into the secondary side circuit by the first gas-liquid pump, and the cooling liquid not completely drained in the secondary side circuit is dried.

[0016] In combination with the first aspect, in some embodiments, the liquid cooling system further comprises a first liquid level sensor and a second liquid level sensor; the first liquid level sensor is configured to detect the liquid level in the primary side circuit, and the second liquid level sensor is configured to detect the liquid level in the secondary side circuit; and the liquid discharge device further comprises a control unit.

[0017] The control unit is configured to, when receiving a first liquid discharge instruction and the detection value of the first liquid level sensor is lower than a preset liquid level, control the second gas charging valve, the liquid tank valve, the first liquid discharge valve and the second liquid discharge valve to be closed, and control the first vent, the first gas charging valve and the first gas tank valve to be opened; wherein the first liquid discharge instruction is used to instruct to discharge the liquid in the primary side circuit.

[0018] The control unit is further configured to, when receiving a second liquid discharge instruction and the detection value of the second liquid level sensor is lower than the preset liquid level, control the first gas charging valve, the liquid tank valve, the first liquid discharge valve and the second liquid discharge valve to be closed, and control the second vent, the second gas charging valve and the first gas tank valve to be opened; wherein the second liquid discharge instruction is used to instruct to discharge the liquid in the secondary side circuit.

[0019] In conjunction with the first aspect, in some embodiments, the drainage unit further includes a liquid storage tank, a second gas-liquid dual-purpose pump, and a third gas-liquid dual-purpose pump; the drying unit further includes the second gas-liquid dual-purpose pump, the third gas-liquid dual-purpose pump, a second gas storage tank, and a third gas storage tank; both the second and third gas storage tanks store gas at a temperature higher than a preset temperature; the draining device further includes a second gas tank valve, a third gas tank valve, a first valve, a second valve, and a third valve, wherein the liquid storage tank valve is located at the inlet end of the liquid storage tank, the second gas tank valve is located at the outlet end of the second gas storage tank, and the third gas tank valve is located at the outlet end of the first gas storage tank. The outlet of the third gas storage tank; the inlet of the second gas-liquid dual-purpose pump is connected to the first drain valve, the second gas tank valve and the first end of the third valve respectively; the outlet of the second gas-liquid dual-purpose pump is connected to the first inflation valve and the first end of the first valve respectively; the inlet of the third gas-liquid dual-purpose pump is connected to the second drain valve, the third gas tank valve and the second end of the third valve respectively; the outlet of the third gas-liquid dual-purpose pump is connected to the second inflation valve and the first end of the second valve respectively; the liquid storage tank valve is connected to the second end of the first valve and the second end of the second valve respectively.

[0020] In conjunction with the first aspect, in some embodiments, when the first drain valve, the second drain valve, the first valve, the second valve, and the storage tank valve are open, and the first inflation valve, the second inflation valve, the third valve, the second gas tank valve, and the third gas tank valve are closed, the coolant in the primary circuit is drawn into the storage tank by the second gas-liquid dual-purpose pump, and the coolant in the secondary circuit is drawn into the storage tank by the third gas-liquid dual-purpose pump;

[0021] With the first vent, the second vent, the first inflation valve, the second inflation valve, the second gas tank valve, and the third gas tank valve open, and the first drain valve, the second drain valve, the first valve, the second valve, the third valve, and the storage tank valve closed, the gas in the second storage tank is injected into the primary circuit through the second gas-liquid dual-purpose pump to dry the coolant that has not been completely pumped out in the primary circuit, and the gas in the third storage tank is injected into the secondary circuit through the third gas-liquid dual-purpose pump to dry the coolant that has not been completely pumped out in the secondary circuit.

[0022] Secondly, embodiments of the present invention provide a control method for a draining device, applied to a liquid cooling system, the liquid cooling system including a primary side circuit and a secondary side circuit; the draining device includes a drainage unit and a drying unit disposed between the primary side circuit and the secondary side circuit; the control method includes:

[0023] controlling the drainage unit to communicate with the primary side circuit, and controlling the drainage unit to drain the cooling liquid in the primary side circuit;

[0024] controlling the drying unit to communicate with the primary side circuit, and controlling the drying unit to dry the cooling liquid in the primary side circuit which is not drained by the drainage unit;

[0025] controlling the drainage unit to communicate with the secondary side circuit, and controlling the drainage unit to drain the cooling liquid in the secondary side circuit;

[0026] controlling the drying unit to communicate with the secondary side circuit, and controlling the drying unit to dry the cooling liquid in the secondary side circuit which is not drained by the drainage unit.

[0027] In a third aspect, an embodiment of the present application provides a liquid cooling system, comprising a primary side circuit, a secondary side circuit, and the liquid drainage device according to any one of the first aspect.

[0028] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the control method of the liquid drainage device according to the second aspect when executing the computer program.

[0029] In a fifth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executable on a processor to implement the control method of the liquid drainage device according to the second aspect.

[0030] In a sixth aspect, an embodiment of the present application provides a computer program product, which, when executed on an electronic device, causes the electronic device to perform the control method of the liquid drainage device according to the second aspect.

[0031] Compared with the related art, the embodiment of the present application has the following beneficial effects:

[0032] The embodiment of the present application provides a liquid drainage device, which is applied to a liquid cooling system, the liquid cooling system comprising a primary side circuit and a secondary side circuit; the liquid drainage device comprising a drainage unit and a drying unit arranged between the primary side circuit and the secondary side circuit, the drainage unit being configured to drain the cooling liquid in the primary side circuit and the secondary side circuit, and the drying unit being configured to dry the cooling liquid in the primary side circuit and the secondary side circuit which is not drained by the drainage unit. The liquid drainage device is arranged between the primary side circuit and the secondary side circuit, so that the liquid drainage and drying of the primary side circuit and the secondary side circuit can be completed by only one set of liquid drainage device, and the cooling liquid in the primary side circuit and the secondary side circuit can be completely drained.

[0033] It can be understood that the beneficial effects of the above-mentioned second aspect to the sixth aspect can be referred to the relevant description in the above-mentioned first aspect, which will not be repeated here.

[0034] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present specification. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or related description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is a schematic diagram of the application scene of the drainage device provided by an embodiment of the present application;

[0037] Figure 2 is a structural schematic diagram of the drainage device provided by an embodiment of the present application;

[0038] Figure 3 is a flowchart of the control method of the drainage device provided by an embodiment of the present application;

[0039] Figure 4 is a structural schematic diagram of the drainage device provided by another embodiment of the present application;

[0040] Figure 5 is a flowchart of the control method of the drainage device provided by another embodiment of the present application;

[0041] Figure 6 is a structural schematic diagram of the drainage device provided by another embodiment of the present application;

[0042] Figure 7 is a structural schematic diagram of the electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0043] In the following description, specific details are set forth in order to provide a thorough understanding of embodiments of the application. However, persons of ordinary skill in the art will readily recognize that embodiments of the application can be practiced without many of the specific details, and that the detailed description is designed to support a thorough understanding of the present application. In other instances, well-known systems, circuits, and methods have not been described in detail in order to avoid obscuring the present application.

[0044] It should be understood that the term "comprising" as used in the specification and in the following claims indicates the presence of the recited features, integers, steps, operations, elements, and / or components but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Also, in the description of the specification and in the claims that follow, the terms "first", "second", "third", etc. are used merely as labels for distinguishing between different features, and do not necessarily imply a sequence or order of importance.

[0045] Reference in the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment", "in some embodiments", "in other embodiments", "in additional embodiments", etc. in various places in the specification are not necessarily all referring to the same embodiment, although they can. Rather, they constitute different instances of embodiments in which the alternative is true.

[0046] The coolant of the liquid cooling device will be affected by various factors during long-term use, and its performance will gradually decline. On the one hand, the coolant will chemically react with the metal parts, causing corrosion, which not only damages the internal structure of the device, but also mixes metal ions and other impurities into the coolant, affecting its heat dissipation performance and chemical stability. On the other hand, the coolant will continuously absorb heat during circulation, and repeated temperature changes may cause decomposition or failure of its additives, reducing its antifreeze, anti-boiling, and anti-fouling functions. In addition, microorganisms such as bacteria and algae may grow in the coolant, forming biofilms that block the cooling pipeline, affecting the normal flow of the coolant and the heat dissipation effect. Therefore, the coolant needs to be replaced regularly. When replacing, the original coolant in the device needs to be drained first, and as much as possible should be drained, otherwise the impurities in the residual coolant will also affect the performance of the newly replaced coolant.

[0047] In addition, the coolant in the liquid cooling device also needs to be drained before transportation to avoid leakage during transportation, and part of the coolant may have certain corrosiveness or conductivity, which may have adverse effects on other items or equipment after leakage, or even cause safety accidents.

[0048] In related technologies, the liquid cooling device is usually drained through the drainage port provided by the device, which is difficult to drain the residual coolant in the pipeline. In addition, there are some additional drainage devices, which are mostly used for local drainage. For example, only the liquid cooling plate in the local loop of the liquid cooling device is drained and purged, and such a drainage device is difficult to meet the drainage needs of the entire liquid cooling device.

[0049] Based on the above problems, the embodiment of the present application provides a liquid discharge device applied to a liquid cooling system including a primary side loop and a secondary side loop, the liquid discharge device includes a drainage unit and a drying unit connected between the primary side loop and the secondary side loop respectively, the drainage unit is used to discharge the coolant in the primary side loop and the secondary side loop, and the drying unit is used to dry the coolant in the primary side loop and the secondary side loop which is not discharged by the drainage unit. That is, the present application can discharge the primary side loop and the secondary side loop of the liquid cooling system by one set of liquid discharge device, and the drying unit can also ensure that the residual coolant in the loop is dried, and the coolant is completely discharged.

[0050] For example, the embodiment of the present application can be applied to the example scene as shown in Figure 1 The scene includes the loop structure of a certain liquid cooling system, as shown in Figure 1 The loop of the liquid cooling system includes a primary side loop 11 and a secondary side loop 12. The primary side loop 11 is composed of a primary side pipeline 13 and a cold medium pipeline in a plate heat exchanger 15, and the secondary side loop 12 is composed of a secondary side pipeline 14 and a hot medium pipeline in the plate heat exchanger 15. Since the pipeline structure of the plate heat exchanger 15 is usually complex and compact, it is difficult to discharge the residual liquid in the fins during liquid discharge. Figure 1 The scene also includes the liquid discharge device 10 in the embodiment of the present application, which is arranged between the primary side loop 11 and the secondary side loop 12. Thus, when the entire liquid cooling system is discharged, the drainage distance of the plate heat exchanger 15 is short, thereby helping to improve the drainage efficiency and effect; if a water pump is used to pump water, the pumping head can be reduced, and the pumping efficiency can be improved.

[0051] Next, the liquid discharge device 10 and the control method thereof provided by the embodiment of the present application will be described in detail in combination with the drawings of the specification:

[0052] Referring to Figure 2 The liquid discharge device 10 in the embodiment of the present application is applied to a liquid cooling system including a primary side loop 11 and a secondary side loop 12. The liquid discharge device 10 includes:

[0053] The drainage unit 21 is connected between the primary side loop 11 and the secondary side loop 12, and is used to discharge the coolant in the primary side loop 11 and the secondary side loop 12.

[0054] The drying unit 22 is connected between the primary side loop 11 and the secondary side loop 12, and is used to dry the coolant in the primary side loop 11 and the secondary side loop 12 which is not discharged by the drainage unit 21.

[0055] Corresponding to the liquid discharge device 10 shown in Figure 2 The embodiment of the present application also provides a control method of the liquid discharge device 10, as shown inFigure 3 The control method of the liquid draining device 10 includes:

[0056] Step 301, control the drainage unit 21 to communicate with the primary side circuit 11, and control the drainage unit 21 to drain the cooling liquid in the primary side circuit 11.

[0057] Step 302, control the drying unit 22 to communicate with the primary side circuit 11, and control the drying unit 22 to dry the cooling liquid in the primary side circuit 11 which is not drained by the drainage unit 21.

[0058] Step 303, control the drainage unit 21 to communicate with the secondary side circuit 12, and control the drainage unit 21 to drain the cooling liquid in the secondary side circuit 12.

[0059] Step 304, control the drying unit 22 to communicate with the secondary side circuit 12, and control the drying unit 22 to dry the cooling liquid in the secondary side circuit 12 which is not drained by the drainage unit 21.

[0060] The above embodiment, when draining a side circuit, first controls the drainage unit 21 to communicate with the side circuit to drain the cooling liquid, and then dries the remaining cooling liquid through the drying unit 22, thereby realizing the draining and drying of the entire liquid cooling system and ensuring that there is no residual liquid in the pipeline. It can be understood that in actual application, the primary side can be drained and dried first, or the secondary side can be drained and dried first, and the order of the change does not affect the draining effect of the liquid cooling system.

[0061] Further, the liquid cooling system in the embodiment of the present application can include a primary side pipeline 13, a plate heat exchanger 15, and a secondary side pipeline 14. The plate heat exchanger 15 includes a cold medium pipeline and a hot medium pipeline. The primary side circuit 11 is formed by the primary side pipeline 13 and the cold medium pipeline, and the secondary side circuit 12 is formed by the secondary side pipeline 14 and the hot medium pipeline, as shown in Figure 1 .

[0062] In a possible implementation, the drainage unit 21 is connected to the primary side pipeline 13 and the secondary side pipeline 14 respectively; the drying unit 22 is connected to the primary side pipeline 13 and the secondary side pipeline 14 respectively. That is, the interface through which the drainage unit 21 is connected to the liquid cooling system can be an interface on the primary side pipeline 13 or the secondary side pipeline 14, and the same applies to the drying unit 22.

[0063] In another possible implementation, the drainage unit 21 is connected to the external pipeline / interface of the cold medium pipeline and the hot medium pipeline of the plate heat exchanger 15, respectively; the drying unit 22 is connected to the external pipeline / interface of the cold medium pipeline and the hot medium pipeline of the plate heat exchanger 15, respectively. That is, the interface through which the drainage unit 21 is connected to the liquid cooling system can also be the interface of the plate heat exchanger 15, or the interface on the connecting pipeline between the plate heat exchanger 15 and a certain side loop; the same applies to the drying unit 22.

[0064] Referring to Figure 3 The primary side loop 11 can be provided with a primary side liquid outlet and a primary side air inlet; the secondary side loop 12 can be provided with a secondary side liquid outlet and a secondary side air inlet.

[0065] The drainage unit 21 can include a first liquid outlet valve 41 and a second liquid outlet valve 42. The first liquid outlet valve 41 is connected to the primary side liquid outlet, and the second liquid outlet valve 42 is connected to the secondary side liquid outlet.

[0066] The drying unit 22 can include a first air inlet valve 43, a second air inlet valve 44, and drying gas. The first air inlet valve 43 is connected to the primary side air inlet, and the second air inlet valve 44 is connected to the secondary side air inlet. The drying gas is used to dry the cooling liquid in the primary side loop 11 and the secondary side loop 12 that is not exhausted by the drainage unit 21.

[0067] In the above embodiment, when the liquid drainage device 10 drains the liquid cooling system, the first liquid outlet valve 41 or the second liquid outlet valve 42 of the drainage unit 21 is opened, and the cooling liquid can be exhausted from the corresponding loop by relying on gravity or other power sources. When the drainage unit 21 completes the extraction of the cooling liquid, the first liquid outlet valve 41 and the second liquid outlet valve 42 are closed, and then the first air inlet valve 43 or the second air inlet valve 44 is opened, so that the drying gas is filled into the primary side loop 11 or the secondary side loop 12. The drying gas flows in the loop and carries away the cooling liquid that is not exhausted by the drainage unit. By continuously filling the drying gas until the cooling liquid in the loop is completely dried, it is ensured that there is no cooling liquid remaining in the liquid cooling system.

[0068] Figure 4 A structural schematic diagram of the liquid drainage device 10 provided by a specific embodiment of the present application is shown.

[0069] Referring to Figure 4 The drainage unit 21 in the present embodiment can include a first liquid outlet valve 41, a second liquid outlet valve 42, a liquid storage tank 45, a liquid storage tank valve 451 arranged at the inlet end of the liquid storage tank 45, and a first gas-liquid pump 46. The drying unit 22 can include a first air inlet valve 43, a second air inlet valve 44, the first gas-liquid pump 46, a first gas storage tank 47, and a first gas tank valve 471 arranged at the outlet end of the first gas storage tank 47. The first gas storage tank 47 is provided with a heating resistance wire 48 for heating the gas in the first gas storage tank 47.

[0070] The outlet of the first gas-liquid pump 46 is connected to the inlet of the first gas charging valve 43, the second gas charging valve 44 and the liquid storage tank 45 respectively.

[0071] The functions of the liquid draining device 10 are as follows:

[0072] When the first liquid draining valve 41 and the liquid storage tank valve 451 are opened, and the first gas charging valve 43, the second gas charging valve 44, the second liquid draining valve 42 and the first gas tank valve 471 are closed, the cooling liquid in the primary side circuit 11 can flow into the drainage unit 21 from the primary side liquid draining port and be pumped into the liquid storage tank 45 by the first gas-liquid pump 46.

[0073] When the first vent port, the first gas charging valve 43 and the first gas tank valve 471 are opened, and the second gas charging valve 44, the liquid storage tank valve 451, the first liquid draining valve 41 and the second liquid draining valve 42 are closed, the heated gas in the first gas tank 47 is charged into the primary side circuit 11 by the first gas-liquid pump 46 to dry the cooling liquid that has not been drained in the primary side circuit 11.

[0074] When the second liquid draining valve 42 and the liquid storage tank valve 451 are opened, and the first gas charging valve 43, the second gas charging valve 44, the first liquid draining valve 41 and the first gas tank valve 471 are closed, the cooling liquid in the secondary side circuit 12 can flow into the drainage unit 21 from the secondary side liquid draining port and be pumped into the liquid storage tank 45 by the first gas-liquid pump 46.

[0075] When the second vent port, the second gas charging valve 44 and the first gas tank valve 471 are opened, and the first gas charging valve 43, the liquid storage tank valve 451, the first liquid draining valve 41 and the second liquid draining valve 42 are closed, the heated gas in the first gas tank 47 is charged into the secondary side circuit 12 by the first gas-liquid pump 46 to dry the cooling liquid that has not been drained in the secondary side circuit 12.

[0076] The first vent port is a gas hole provided on the primary side circuit 11, and the second vent port is a gas hole provided on the secondary side circuit 12. The first vent port and the second vent port can be the original liquid draining port of the primary side circuit 11 and the secondary side circuit 12, or can be gas holes specially provided on the primary side circuit 11 and the secondary side circuit 12 for venting. During drying, the corresponding gas holes can be opened to maintain the balance of the air pressure inside and outside the system, and the water vapor generated by the evaporation of the cooling liquid under the action of the heated gas can be discharged through the gas holes to ensure the drying of the circuit.

[0077] The above embodiment, by connecting the first drain valve 41 with the primary side drain port, and connecting the second drain valve 42 with the secondary side drain port, can perform the cooling liquid discharge operation for the primary side circuit 11 and the secondary side circuit 12 respectively. When the corresponding drain valve and the liquid tank valve 451 are opened, and other valves are closed, the cooling liquid can flow from the corresponding circuit into the drain unit 21, and be efficiently pumped into the liquid tank 45 by the suction action of the first gas-liquid pump 46, realizing independent and accurate discharge of cooling liquid of different circuits, and improving the accuracy and efficiency of liquid discharge. The first gas tank 47 is provided with a heating resistance wire 48, which can heat the gas in the tank. During the drying stage, when the corresponding air inlet, air charging valve and first gas tank valve 471 are opened, and other valves are closed, the heated gas can be charged into the corresponding circuit through the first gas-liquid pump 46, and the heat of the hot gas can evaporate the residual cooling liquid, thereby realizing the drying treatment of the circuit, effectively removing the residual cooling liquid, and avoiding the adverse consequences such as corrosion and performance influence of the residual cooling liquid on the circuit.

[0078] It should be noted that the above-mentioned liquid discharge device 10 is arranged between the primary and secondary side circuits, which can also effectively shorten the pumping distance, reduce the pumping head of the first gas-liquid pump 46, and improve the pumping efficiency.

[0079] Based on Figure 4 The liquid cooling system in the embodiment can further include a first liquid level sensor and a second liquid level sensor. The first liquid level sensor can be used to detect the liquid level in the primary side circuit 11, and the second liquid level sensor can be used to detect the liquid level in the secondary side circuit 12.

[0080] Correspondingly, the liquid discharge device 10 can further include a control unit, configured to control the second air charging valve 44, the liquid tank valve 451, the first drain valve 41 and the second drain valve 42 to be closed, and control the first air inlet, the first air charging valve 43 and the first gas tank valve 471 to be opened, when receiving a first drain instruction and the detection value of the first liquid level sensor is lower than a preset liquid level. The control unit is also configured to control the first air charging valve 43, the liquid tank valve 451, the first drain valve 41 and the second drain valve 42 to be closed, and control the second air inlet, the second air charging valve 44 and the first gas tank valve 471 to be opened, when receiving a second drain instruction and the detection value of the second liquid level sensor is lower than a preset liquid level.

[0081] The first drain instruction is used to indicate the liquid discharge of the primary side circuit 11, and the second drain instruction is used to indicate the liquid discharge of the secondary side circuit 12.

[0082] In this embodiment, each valve in the liquid draining device 10 can be an electric valve, and is electrically connected to the control unit. The first liquid level sensor and the second liquid level sensor are also electrically connected to the control unit. The first liquid level sensor can monitor the liquid level of the primary side circuit 11 in real time and send the monitoring data to the control unit in real time. The second liquid level sensor can monitor the liquid level of the secondary side circuit 12 in real time and also send the monitoring data to the control unit in real time.

[0083] In this embodiment, when the control unit receives a first liquid draining instruction, the first liquid draining valve 41 and the liquid storage tank valve 451 are opened, and the remaining valves are closed, so as to drain the cooling liquid in the primary side circuit 11. During this process, when it is detected that the detection value of the first liquid level sensor is lower than the preset liquid level, the first vent, the first air charging valve 43, and the first air tank valve 471 are opened, and the remaining valves are closed, so as to dry the residual cooling liquid in the primary side circuit 11, thereby realizing automatic liquid draining and drying of the primary side circuit 11. When the control unit receives a second liquid draining instruction, the second liquid draining valve 42 and the liquid storage tank valve 451 are opened, and the remaining valves are closed, so as to drain the cooling liquid in the secondary side circuit 12. During this process, when it is detected that the detection value of the second liquid level sensor is lower than the preset liquid level, the second vent, the second air charging valve 44, and the first air tank valve 471 are opened, and the remaining valves are closed, so as to dry the residual cooling liquid in the secondary side circuit 12, thereby realizing automatic liquid draining and drying of the secondary side circuit 12.

[0084] Corresponding to the above-mentioned liquid draining device 10, the present embodiment also provides a control method of the liquid draining device 10, as shown in Figure 5 The control method comprises the following steps:

[0085] In step 501, when a first liquid draining instruction is received, the first liquid draining valve 41 and the liquid storage tank valve 451 are opened, and the second liquid draining valve 42, the first air charging valve 43, the second air charging valve 44, and the first air tank valve 471 are closed.

[0086] In step 502, after the first liquid draining valve 41 and the liquid storage tank valve 451 are opened, the first air-liquid dual-purpose pump 46 is controlled to operate in the liquid pump mode to drain the liquid in the primary side circuit 11.

[0087] In step 503, during the process of draining the liquid in the primary side circuit 11, when the detection value of the first liquid level sensor is lower than the preset liquid level, the first liquid draining valve 41 and the liquid storage tank valve 451 are closed, the first vent, the first air charging valve 43, and the first air tank valve 471 are opened, and the first air-liquid dual-purpose pump 46 is switched from the liquid pump mode to the air pump mode, so as to pump the gas in the first air tank 47 into the primary side circuit 11 and dry the residual cooling liquid in the primary side circuit 11.

[0088] Step 504, when receiving the second draining instruction, control the second draining valve 42 and the liquid tank valve 451 to open, and control the first draining valve 41, the first charging valve 43, the second charging valve 44 and the first gas tank valve 471 to close.

[0089] Step 505, after the second draining valve 42 and the liquid tank valve 451 are opened, control the first gas-liquid pump 46 to run in the liquid pump mode to drain the secondary side circuit 12.

[0090] Step 506, during the process of draining the secondary side circuit 12, when the detection value of the second liquid level sensor is lower than the preset liquid level, control the second draining valve 42 and the liquid tank valve 451 to close, and control the second vent, the second charging valve 44, the first gas tank valve 471 to open, and control the first gas-liquid pump 46 to switch from the liquid pump mode to the gas pump mode to pump the gas in the first gas tank 47 into the secondary side circuit 12 to dry the cooling liquid that has not been drained in the secondary side circuit 12.

[0091] The control method of the draining device 10 in the above embodiment can realize effective draining and drying treatment of the cooling liquid in the primary side circuit 11 and the secondary side circuit 12, and has the following remarkable effects:

[0092] 1) High-efficiency draining can be realized. When receiving the corresponding draining instruction, the corresponding draining valve and the liquid tank valve 451 can be quickly and accurately opened, and the irrelevant valves can be closed to ensure the smoothness of the draining path. Then the first gas-liquid pump 46 is controlled to run in the liquid pump mode to perform the draining operation on the primary side circuit or the secondary side circuit by using the pumping action of the pump. This targeted control enables the cooling liquid to be quickly and efficiently drained from the corresponding circuit and discharged into the designated liquid tank, improving the draining efficiency and reducing the time and energy consumption required for draining.

[0093] 2) Precise liquid level control can be realized. During the draining process, the liquid level in the circuit is monitored in real time by the liquid level sensor. When the detection value of the liquid level sensor is lower than the preset liquid level, the corresponding draining valve and the liquid tank valve 451 are closed in time to avoid the empty pumping of the pump, protect the safe operation of the pump body and the entire system, and also prevent unnecessary residual cooling liquid. This precise liquid level control measure ensures the accuracy and reliability of the draining process, ensures that the system operates according to the predetermined process, and reduces the possibility of human intervention and misoperation.

[0094] 3) can realize effective drying. After the liquid level reaches the preset low position, the first gas-liquid pump 46 is automatically switched to the gas pump mode, and the corresponding air vent, air filling valve and first gas tank valve 471 are opened, the gas in the first gas storage tank 47 is pumped into the circuit. The introduction of gas can effectively dry the cooling liquid not pumped out in the circuit, avoid the adverse effects of cooling liquid residue on the circuit, such as corrosion, scaling, etc., help to keep the circuit clean and stable performance, and prolong the service life of the system.

[0095] 4) Two sides of the circuit are independently operated, and the flexibility is high. For the primary side circuit and the secondary side circuit, independent liquid discharge instructions can be received for respective liquid discharge and drying operations. This way of independent control of the circuit makes the system more flexible and operable, can meet the cooling liquid treatment needs of different circuits under different working conditions, and improves the adaptability of the system to complex working environments.

[0096] In summary, the control method in the above embodiment can realize efficient and accurate discharge and drying treatment of the cooling liquid of the primary side circuit 11 and the secondary side circuit 12 through reasonable valve control, pump mode switching, and liquid level monitoring and feedback. At the same time, the above control method also brings beneficial effects in improving the safety and stability of the system and enhancing the adaptability of the system, providing a strong guarantee for the reliable operation of the entire system.

[0097] Figure 6 The structure of the liquid discharge device 10 provided by another specific embodiment of the application is shown.

[0098] Referring to Figure 6 , the drainage unit 21 can include a first liquid discharge valve 41, a second liquid discharge valve 42, a liquid storage tank 45, a liquid storage tank valve 451 arranged at the inlet end of the liquid storage tank 45, a second gas-liquid pump 62, and a third gas-liquid pump 63. The drying unit 22 can include a first air filling valve 43, a second air filling valve 44, a second gas-liquid pump 62, a third gas-liquid pump 63, a second gas storage tank 64, a second gas tank valve 641 arranged at the outlet end of the second gas storage tank 64, a third gas storage tank 65, and a third gas tank valve 651 arranged at the outlet end of the third gas storage tank 65.

[0099] Among them, the second gas storage tank 64 and the third gas storage tank 65 each store gas with a temperature higher than a preset temperature. The liquid discharge device 10 further includes a first valve 66, a second valve 67, and a third valve 68.

[0100] As Figure 6As shown, the inlet of the second gas-liquid pump 62 is connected with the first liquid discharge valve 41, the second gas tank valve 641 and the first end of the third valve 68 respectively; the outlet of the second gas-liquid pump 62 is connected with the first gas filling valve 43 and the first end of the first valve 66 respectively. The inlet of the third gas-liquid pump 63 is connected with the second liquid discharge valve 42, the third gas tank valve 651 and the second end of the third valve 68 respectively; the outlet of the third gas-liquid pump 63 is connected with the second gas filling valve 44 and the first end of the second valve 67 respectively. The liquid tank valve 451 is connected with the second end of the first valve 66 and the second end of the second valve 67 respectively.

[0101] The liquid discharge device 10 in the embodiment is provided with two gas-liquid pumps, and through the opening and closing cooperation of the valves, various liquid discharge modes can be realized. For example, the two side circuits can be simultaneously discharged and dried by one gas-liquid pump respectively; for another example, the liquid in any side circuit can be discharged and dried by two gas-liquid pumps; for another example, the liquid in one side circuit can be discharged by one gas-liquid pump, while the residual liquid in the other side circuit can be dried by the other gas-liquid pump. The liquid discharge processes of the above-mentioned liquid discharge modes will be described as follows:

[0102] Liquid discharge mode one: the two side circuits are simultaneously discharged and dried by one gas-liquid pump respectively.

[0103] The first liquid discharge valve 41, the second liquid discharge valve 42, the first valve 66, the second valve 67 and the liquid tank valve 451 are opened, and the first gas filling valve 43, the second gas filling valve 44, the third valve 68, the second gas tank valve 641 and the third gas tank valve 651 are closed. The second gas-liquid pump 62 and the third gas-liquid pump 63 are started to run in the liquid pump mode, and the cooling liquid in the primary side circuit 11 is pumped out to the liquid tank 45 by the second gas-liquid pump 62, and the cooling liquid in the secondary side circuit 12 is pumped out to the liquid tank 45 by the third gas-liquid pump 63.

[0104] When the liquid levels of the primary side circuit 11 and the secondary side circuit 12 are both lowered to a certain degree, the first gas vent, the second gas vent, the first gas filling valve 43, the second gas filling valve 44, the second gas tank valve 641 and the third gas tank valve 651 are opened, and the first liquid discharge valve 41, the second liquid discharge valve 42, the first valve 66, the second valve 67, the third valve 68 and the liquid tank valve 451 are closed. The second gas-liquid pump 62 and the third gas-liquid pump 63 are started to run in the liquid pump mode, the gas in the second gas tank 64 is filled into the primary side circuit 11 by the second gas-liquid pump 62 to dry the cooling liquid not pumped out in the primary side circuit 11, and the gas in the third gas tank 65 is filled into the secondary side circuit 12 by the third gas-liquid pump 63 to dry the cooling liquid not pumped out in the secondary side circuit 12.

[0105] This drainage mode is suitable for scenarios where both sides of the circuit need to be drained at the same time. Both sides of the circuit can be drained and dried simultaneously, which can improve the efficiency of the drainage. At the same time, the above drainage mode one is also suitable for scenarios where only one side of the circuit needs to be drained. At this time, only the single-sided valve and the gas-liquid pump need to be opened.

[0106] Drainage mode two: one side of the circuit is drained and dried by two gas-liquid pumps.

[0107] Take the drainage and drying process of the primary side circuit 11 as an example:

[0108] Open the first drainage valve 41, the liquid tank valve 451, the first valve 66, the second valve 67 and the third valve 68, close the first air charging valve 43, the second air charging valve 44, the second drainage valve 42, the second gas tank valve 641 and the third gas tank valve 651. Start the second gas-liquid pump 62 and the third gas-liquid pump 63 in the liquid pump mode. The cooling liquid in the primary side circuit 11 is pumped out to the liquid tank 45 by the second gas-liquid pump 62 and the third gas-liquid pump 63.

[0109] When the liquid level of the primary side circuit 11 drops to a certain extent, close the first drainage valve 41, the liquid tank valve 451 and the third valve 68, open the second gas tank valve 641, the third gas tank valve 651 and the first air charging valve 43, and the remaining valves remain unchanged. Switch the second gas-liquid pump 62 and the third gas-liquid pump 63 to the gas pump mode. The high-temperature gas in the second gas tank 64 is charged into the primary side circuit 11 through the second gas-liquid pump 62, and the high-temperature gas in the third gas tank 65 is charged into the primary side circuit 11 through the third gas-liquid pump 63, which dries the remaining cooling liquid in the primary side circuit 11.

[0110] The above-mentioned drainage mode two is suitable for liquid cooling systems with large drainage volume or limited drainage time.

[0111] For example, when draining the cooling circulation circuit of a large steel smelting equipment, due to the large size of the primary side circuit, complex pipeline and large amount of cooling liquid storage, two gas-liquid pumps working together can speed up the drainage speed and improve the maintenance efficiency. When the equipment needs to be maintained or repaired, the primary side circuit needs to be drained and dried. This drainage mode can more efficiently handle a large amount of cooling liquid. Moreover, large equipment has higher requirements for drying. By providing high-temperature gas from two gas tanks, more sufficient high-temperature gas can be provided to ensure that the remaining cooling liquid in the complex pipeline is completely dried, preventing the equipment from rusting or corroding due to residual cooling liquid, thereby ensuring the stability and reliability of the equipment in subsequent operation.

[0112] For example, large transformers and other equipment in power substations use liquid cooling systems to maintain normal operating temperature. When maintaining the primary cooling circuit of these devices, the cooling liquid needs to be drained and the circuit needs to be dried. Due to the importance of electrical equipment and the strict requirements for stable operation, two gas-liquid pumps are used to work simultaneously to complete the liquid draining process in a short time, reduce equipment downtime, and reduce the impact on power supply. At the same time, sufficient high-temperature gas drying can effectively remove moisture in the circuit, avoid electrical faults such as short circuit and leakage caused by a humid environment, and ensure the safe and stable operation of the power system.

[0113] Draining mode three: one side of the circuit discharges liquid while the other side of the circuit dries residual liquid.

[0114] For example, the primary circuit 11 is drained and the secondary circuit 12 is dried:

[0115] The first draining valve 41, the liquid tank valve 451, the first valve 66, the second gas charging valve 44, and the third gas tank valve 651 are opened, and the first gas charging valve 43, the second draining valve 42, the second gas tank valve 641, the second valve 67, and the third valve 68 are closed. The second gas-liquid pump 62 is started to operate in liquid pump mode, and the third gas-liquid pump 63 is started to operate in gas pump mode. The cooling liquid in the primary circuit enters the second gas-liquid pump 62 through the first draining valve 41, then enters the liquid tank 45 through the first valve 66 and the liquid tank valve 451, and the high-temperature gas in the third gas tank 65 enters the third gas-liquid pump 63 through the third gas tank valve 651, then enters the secondary circuit through the second gas charging valve 44 to dry the residual cooling liquid in the secondary circuit.

[0116] The application scenario of the above-mentioned draining mode three can be when the liquid level of the secondary circuit 12 is already low to the preset liquid level, while the liquid level of the primary circuit 11 is still high. At this time, the draining device 10 can still be controlled to drain the primary circuit 11, while drying the secondary circuit 12.

[0117] It should be understood that Figure 6 The control method of the draining device 10 shown can be flexibly selected according to actual conditions. For example, a plurality of draining modes can be preset in the main control unit of the draining device 10. The main control unit can select the corresponding draining mode to flexibly control the valves and pumps according to the draining mode instruction input by the user, so as to meet various draining requirements and improve the draining efficiency of the liquid cooling system.

[0118] In some embodiments, based on Figure 6The shown liquid discharge device 10 can also have two liquid storage tanks 45, one for storing the cooling liquid discharged from the primary side circuit 11 and the other for storing the cooling liquid discharged from the secondary side circuit 12. In this way, when the cooling liquid in the primary side circuit 11 and the secondary side circuit 12 has different compositions, the two kinds of cooling liquid can be stored separately, and the discharged cooling liquid can be reused in subsequent production debugging processes and the like under the condition that the performance requirements are met, thereby avoiding the problem that the mixed cooling liquid cannot be reused and helping to reduce costs.

[0119] The embodiment of the present application also provides a liquid cooling system, comprising the primary side circuit 11, the secondary side circuit 12 and the liquid discharge device 10 in any of the above embodiments.

[0120] The embodiment of the present application also provides an electronic device, referring to Figure 7 The electronic device 70 of the embodiment comprises a processor 71 and a memory 72. The memory 72 stores a computer program. The processor 71 implements the steps in the above various method embodiments when executing the computer program.

[0121] For example, the computer program can be divided into one or more modules / units, which are stored in the memory 72 and executed by the processor 71 to complete the present application. The one or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program in the electronic device 70.

[0122] The electronic device 70 can include, but is not limited to, the processor 71 and the memory 72. Those skilled in the art can understand that Figure 7 The electronic device 70 is only an example and does not constitute a limitation on the electronic device 70, and can include more or fewer components than shown, or combine certain components, or different components, for example, the electronic device 70 can also include an input / output device, a network access device, a bus, etc.

[0123] The processor 71 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0124] The memory 72 can be an internal storage unit of the electronic device 70, for example, a hard disk or a memory of the electronic device 70. The memory 72 can also be an external storage device of the electronic device 70, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the electronic device 70. Further, the memory 72 can include both the internal storage unit and the external storage device of the electronic device 70. The memory 72 is used to store computer programs and other programs and data required by the electronic device 70. The memory 72 can also be used to temporarily store data that has been output or will be output.

[0125] For the convenience and brevity of description, only the above-mentioned division of the functional modules / units is exemplified, and in actual application, the above-mentioned functions can be completed by different functional modules / units according to needs. The above-mentioned modules / units can be realized in the form of hardware, software or a combination of hardware and software.

[0126] The embodiment of the present application further provides a computer readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method in each method embodiment described above is realized.

[0127] The embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the method in each method embodiment described above is realized.

[0128] The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium can include any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, Read-Only Memory (ROM), Random Access Memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0129] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments. If there is no special description and no logical conflict, the terms and / or descriptions of different embodiments are consistent and can be mutually referenced. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0130] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A drainage device, characterized in that, The application is applied to a liquid cooling system, which comprises a primary side circuit and a secondary side circuit; the liquid draining device comprises: a draining unit, which is connected between the primary side circuit and the secondary side circuit, and is used for draining the cooling liquid in the primary side circuit and the secondary side circuit; a drying unit, which is connected between the primary side circuit and the secondary side circuit, and is used for drying the cooling liquid in the primary side circuit and the secondary side circuit which is not drained by the draining unit; the primary side circuit comprises a primary side liquid outlet, a primary side gas inlet and a first gas passage; the secondary side circuit comprises a secondary side liquid outlet, a secondary side gas inlet and a second gas passage; the draining unit comprises a first liquid valve and a second liquid valve, the first liquid valve is connected with the primary side liquid outlet, and the second liquid valve is connected with the secondary side liquid outlet; the drying unit comprises a first gas valve, a second gas valve and a drying gas, the first gas valve is connected with the primary side gas inlet, the second gas valve is connected with the secondary side gas inlet, and the drying gas is used for drying the cooling liquid in the primary side circuit and the secondary side circuit which is not drained by the draining unit; the draining unit further comprises a liquid storage tank and a first gas-liquid pump; the drying unit further comprises the first gas-liquid pump and a first gas storage tank; the first gas storage tank is provided with a heating resistance wire, which is used for heating the gas in the first gas storage tank; the inlet of the first gas-liquid pump is respectively connected with the first liquid valve, the second liquid valve and the outlet of the first gas storage tank; the outlet of the first gas-liquid pump is respectively connected with the first gas valve, the second gas valve and the inlet of the liquid storage tank; the liquid draining device further comprises a first gas tank valve arranged at the outlet end of the first gas storage tank and a liquid storage tank valve arranged at the inlet end of the liquid storage tank.

2. The drainage device according to claim 1, wherein the liquid cooling system comprises a plate heat exchanger, which comprises a cold medium pipeline and a hot medium pipeline; the primary side circuit further comprises a primary side pipeline and the cold medium pipeline, and the secondary side circuit further comprises a secondary side pipeline and the hot medium pipeline; the draining unit is connected with the primary side pipeline and the secondary side pipeline respectively; the drying unit is connected with the primary side pipeline and the secondary side pipeline respectively.

3. The drainage device according to claim 1, wherein when the first liquid valve and the liquid storage tank valve are opened, and the first gas valve, the second gas valve, the second liquid valve and the first gas tank valve are closed, the cooling liquid in the primary side circuit flows into the draining unit and is pumped into the liquid storage tank by the first gas-liquid pump; when the first gas passage, the first gas valve and the first gas tank valve are opened, and the second gas valve, the liquid storage tank valve, the first liquid valve and the second liquid valve are closed, the heated gas in the first gas storage tank is filled into the primary side circuit by the first gas-liquid pump, so as to dry the cooling liquid which is not drained in the primary side circuit; When the second liquid discharge valve and the liquid storage tank valve are opened, and the first gas charging valve, the second gas charging valve, the first liquid discharge valve, and the first gas tank valve are closed, the cooling liquid in the secondary side circuit flows into the drainage unit and is pumped into the liquid storage tank by the first gas-liquid pump; When the second vent, the second gas charging valve, and the first gas tank valve are opened, and the first gas charging valve, the liquid storage tank valve, the first liquid discharge valve, and the second liquid discharge valve are closed, the heated gas in the first gas tank is charged into the secondary side circuit by the first gas-liquid pump to dry the cooling liquid that has not been completely discharged in the secondary side circuit.

4. The drainage device according to claim 1, wherein The liquid cooling system further comprises a first liquid level sensor and a second liquid level sensor; the first liquid level sensor is configured to detect the liquid level in the primary side circuit, and the second liquid level sensor is configured to detect the liquid level in the secondary side circuit; and the liquid discharge device further comprises a control unit; The control unit is configured to: when a first liquid discharge instruction is received and the detection value of the first liquid level sensor is lower than a preset liquid level, control the second gas charging valve, the liquid storage tank valve, the first liquid discharge valve, and the second liquid discharge valve to be closed, and control the first vent, the first gas charging valve, and the first gas tank valve to be opened; wherein the first liquid discharge instruction is used to instruct to discharge the cooling liquid in the primary side circuit; when a second liquid discharge instruction is received and the detection value of the second liquid level sensor is lower than the preset liquid level, control the first gas charging valve, the liquid storage tank valve, the first liquid discharge valve, and the second liquid discharge valve to be closed, and control the second vent, the second gas charging valve, and the first gas tank valve to be opened; wherein the second liquid discharge instruction is used to instruct to discharge the cooling liquid in the secondary side circuit.

5. A drainage device, characterized in that The liquid cooling system comprises a primary side circuit and a secondary side circuit; and the liquid discharge device comprises: a drainage unit connected between the primary side circuit and the secondary side circuit, configured to discharge the cooling liquid in the primary side circuit and the secondary side circuit; a drying unit connected between the primary side circuit and the secondary side circuit, configured to dry the cooling liquid that has not been completely discharged by the drainage unit in the primary side circuit and the secondary side circuit; the primary side circuit comprises a primary side liquid discharge port, a primary side gas inlet, and a first vent; and the secondary side circuit comprises a secondary side liquid discharge port, a secondary side gas inlet, and a second vent; the drainage unit comprises a first liquid discharge valve and a second liquid discharge valve, the first liquid discharge valve is connected to the primary side liquid discharge port, and the second liquid discharge valve is connected to the secondary side liquid discharge port; the drying unit comprises a first gas charging valve, a second gas charging valve, and drying gas, the first gas charging valve is connected to the primary side gas inlet, the second gas charging valve is connected to the secondary side gas inlet, and the drying gas is used to dry the cooling liquid that has not been completely discharged by the drainage unit in the primary side circuit and the secondary side circuit; The drainage unit further comprises a liquid storage tank, a second gas-liquid pump and a third gas-liquid pump; the drying unit further comprises the second gas-liquid pump, the third gas-liquid pump, a second gas storage tank and a third gas storage tank; the second gas storage tank and the third gas storage tank each store gas with a temperature higher than a preset temperature; the liquid drainage device further comprises a second gas tank valve, a third gas tank valve, a first valve, a second valve and a third valve, a liquid storage tank valve is arranged at an inlet end of the liquid storage tank, the second gas tank valve is arranged at an outlet end of the second gas storage tank, and the third gas tank valve is arranged at an outlet end of the third gas storage tank; an inlet of the second gas-liquid pump is connected with a first end of the first liquid drainage valve, the second gas tank valve and the third valve respectively; and an outlet of the second gas-liquid pump is connected with the first gas charging valve and a first end of the first valve respectively; an inlet of the third gas-liquid pump is connected with a second end of the second liquid drainage valve, the third gas tank valve and the third valve respectively; and an outlet of the third gas-liquid pump is connected with the second gas charging valve and a first end of the second valve respectively; the liquid storage tank valve is connected with a second end of the first valve and a second end of the second valve respectively.

6. The drainage device according to claim 5, wherein when the first liquid drainage valve, the second liquid drainage valve, the first valve, the second valve and the liquid storage tank valve are opened and the first gas charging valve, the second gas charging valve, the third valve, the second gas tank valve and the third gas tank valve are closed, the cooling liquid in the primary side circuit is pumped out to the liquid storage tank by the second gas-liquid pump, and the cooling liquid in the secondary side circuit is pumped out to the liquid storage tank by the third gas-liquid pump; when the first vent, the second vent, the first gas charging valve, the second gas charging valve, the second gas tank valve and the third gas tank valve are opened and the first liquid drainage valve, the second liquid drainage valve, the first valve, the second valve, the third valve and the liquid storage tank valve are closed, the gas in the second gas storage tank is charged into the primary side circuit by the second gas-liquid pump to dry the cooling liquid not pumped out in the primary side circuit, and the gas in the third gas storage tank is charged into the secondary side circuit by the third gas-liquid pump to dry the cooling liquid not pumped out in the secondary side circuit.

7. A liquid cooling system, characterized by, The liquid cooling system comprises a primary side circuit, a secondary side circuit and the liquid drainage device according to any one of claims 1 to 6.

8. A control method of a liquid discharge apparatus, characterized by, The control method is applied to the liquid cooling system according to claim 7 and comprises the following steps: controlling the drainage unit to communicate with the primary side circuit and controlling the drainage unit to pump out the cooling liquid in the primary side circuit; controlling the drying unit to communicate with the primary side circuit and controlling the drying unit to dry the cooling liquid not pumped out in the primary side circuit; controlling the drainage unit to communicate with the secondary side circuit and controlling the drainage unit to pump out the cooling liquid in the secondary side circuit; and controlling the drying unit to communicate with the secondary side circuit and controlling the drying unit to dry the cooling liquid not pumped out in the secondary side circuit. The drying unit is controlled to communicate with the secondary side circuit, and the drying unit is controlled to dry the cooling liquid in the secondary side circuit which is not exhausted by the drainage unit.

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