Liquid discharge device, control method thereof and liquid cooling system

Abstract

The invention is suitable for the technical field of liquid cooling products, and provides a liquid discharge device, a control method thereof and a liquid cooling system.The liquid discharge 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 drainage device comprises a water drainage unit and a drying unit which are connected between a primary side loop and a secondary side loop, wherein the water drainage unit is used for pumping out cooling liquid in the primary side loop and the secondary side loop; and the drying unit is used for drying the cooling liquid which is not exhausted by the drainage unit in the primary side loop and the secondary side loop. According to the liquid drainage device, liquid drainage and drying can be performed on the primary side loop and the secondary side loop of the liquid cooling system, and it can be guaranteed that cooling liquid in the primary side loop and the secondary side loop is completely drained.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid cooling products, and in particular relates to a liquid discharge device and a control method thereof, and a liquid cooling system. Background Art

[0002] The coolants commonly used in liquid cooling systems, such as aqueous solutions prepared with ethylene glycol, propylene glycol, etc., or some special fluorinated liquids, do not have a permanent service life. This is because during long-term use, the coolant will be affected by various factors, which will cause its performance to gradually decline. Therefore, in order to ensure the normal operation of the liquid cooling system and the reliability of the equipment, the coolant needs to be replaced regularly. In addition, during the transportation of liquid cooling equipment, since the equipment may be subjected to external forces such as vibration and tilt, if coolant is retained inside the equipment, it may cause coolant leakage, which will not only pollute the transportation equipment and the surrounding environment, but may also damage the equipment itself. Therefore, before transporting the liquid cooling equipment, the coolant inside the equipment must be drained to ensure the safety of the transportation process and the integrity of the equipment.

[0003] At present, when the coolant is replaced regularly or the liquid cooling equipment is transported, the coolant is usually drained through the drain port set in the liquid cooling system. However, in actual applications, due to the complex structure of the liquid cooling system, which includes many pipes, radiators, coolers and other components, the coolant will form various dead corners and stagnation areas in these components. Therefore, it is usually difficult to completely drain all the coolant in the system through the system drain port. Summary of the invention

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

[0005] The present invention is achieved through the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a liquid discharge device, which is applied to a liquid cooling system, wherein the liquid cooling system includes a primary side circuit and a secondary side circuit; the liquid discharge device includes:

[0007] A drainage unit, connected between the primary circuit and the secondary circuit, for extracting the coolant in the primary circuit and the secondary circuit;

[0008] The drying unit is connected between the primary circuit and the secondary circuit, and is used to dry the coolant in the primary circuit and the secondary circuit that has not been completely drained by the drainage unit.

[0009] In combination with the first aspect, in some embodiments, the liquid cooling system also includes a plate heat exchanger, the plate heat exchanger includes a cold medium pipeline and a hot medium pipeline; the primary side loop includes a primary side pipeline and the cold medium pipeline constituting a loop, and the secondary side loop includes a secondary side pipeline and the hot medium pipeline constituting a loop; the drainage unit is respectively connected to the primary side pipeline and the secondary side pipeline; the drying unit is respectively connected to the primary side pipeline and the secondary side pipeline.

[0010] In combination with the first aspect, in some embodiments, the primary side circuit includes a primary side drain port, a primary side air inlet and a first air vent; the secondary side circuit includes a secondary side drain port, a secondary side air inlet and a second air vent; the drainage unit includes a first drain valve and a second drain valve, the first drain valve is connected to the primary side drain port, and the second drain valve is connected to the secondary side drain port; the drying unit includes a first inflation valve, a second inflation valve and drying gas, the first inflation valve is connected to the primary side air inlet, the second inflation valve is connected to the secondary side air inlet, and the drying gas is used to dry the coolant in the primary side circuit and the secondary side circuit that has not been drained by the drainage unit.

[0011] In combination with the first aspect, in some embodiments, the drainage unit also includes a liquid storage tank and a first gas-liquid dual-purpose pump; the drying unit also includes the first gas-liquid dual-purpose pump and a first gas storage tank; a heating resistor is provided in the first gas storage tank for heating the gas in the first gas storage tank; the inlet of the first gas-liquid dual-purpose pump is respectively connected to the first drain valve, the second drain valve and the outlet of the first gas storage tank; the outlet of the first gas-liquid dual-purpose pump is respectively connected to the first inflation valve, the second inflation valve and the inlet of the liquid storage tank; the drainage device also includes a first gas tank valve arranged at the outlet end of the first gas tank, and a liquid tank valve arranged at the inlet end of the liquid storage tank.

[0012] In combination with the first aspect, in some embodiments, when the first drain valve and the valve of the liquid storage tank are opened, and the first charging valve, the second charging valve, the second drain valve, and the first gas tank valve are closed, the coolant in the primary circuit flows into the drain unit and is pumped into the liquid storage tank by the first gas-liquid dual-purpose pump;

[0013] When the first vent, the first charging valve, and the first gas tank valve are opened, and the second charging valve, the liquid storage tank valve, the first drain valve, and the second drain valve are closed, the heated gas in the first gas storage tank is charged into the primary side circuit through the first gas-liquid dual-purpose pump to dry the coolant that has not been completely drained in the primary side circuit;

[0014] When the second drain valve and the valve of the liquid storage tank are opened, and the first charging valve, the second charging valve, the first drain valve, and the first gas tank valve are closed, the coolant in the secondary circuit flows into the drain unit and is pumped into the liquid storage tank by the first gas-liquid dual-purpose pump;

[0015] When the second air vent, the second air charging valve, and the first gas tank valve are opened, and the first air charging valve, the liquid storage tank valve, the first drain valve, and the second drain valve are closed, the heated gas in the first gas storage tank is charged into the secondary side circuit through the first gas-liquid dual-purpose pump to dry the coolant that has not been completely discharged in the secondary side circuit.

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

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

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

[0019] In combination 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; the second gas storage tank and the third gas storage tank both store gas with a temperature higher than a preset temperature; the liquid drainage device further includes a second gas tank valve, a third gas tank valve, a first valve, a second valve and a third valve, the liquid storage tank valve is arranged at the inlet end of the liquid storage tank, the second gas tank valve is arranged at the outlet end of the second gas tank, and the third gas tank valve is arranged at the outlet end of the second gas tank. The outlet end of the third gas storage tank; the inlet of the second gas-liquid dual-purpose pump is respectively connected to the first end of the first liquid discharge valve, the second gas tank valve and the third valve; the outlet of the second gas-liquid dual-purpose pump is respectively connected to the first end of the first inflation valve and the first valve; the inlet of the third gas-liquid dual-purpose pump is respectively connected to the second liquid discharge valve, the third gas tank valve and the second end of the third valve; the outlet of the third gas-liquid dual-purpose pump is respectively connected to the first end of the second inflation valve and the second valve; the liquid storage tank valve is respectively connected to the second end of the first valve and the second end of the second valve.

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

[0021] When the first air vent, the second air vent, the first inflation valve, the second inflation valve, the second gas tank valve and the third gas tank valve are opened, and the first drain valve, the second drain 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 through the second gas-liquid dual-purpose pump to dry the coolant that has not been completely pumped out in the primary side circuit, and the gas in the third gas storage tank is charged into the secondary side circuit through the third gas-liquid dual-purpose pump to dry the coolant that has not been completely pumped out in the secondary side circuit.

[0022] In a second aspect, an embodiment of the present invention provides a control method for a liquid discharge device, which is applied to a liquid cooling system, wherein the liquid cooling system includes a primary circuit and a secondary circuit; the liquid discharge device includes a drainage unit and a drying unit disposed between the primary circuit and the secondary circuit; the control method includes:

[0023] Controlling the drainage unit to communicate with the primary circuit, and controlling the drainage unit to extract the coolant in the primary circuit;

[0024] Controlling the drying unit to be connected to the primary circuit, and controlling the drying unit to dry the coolant in the primary circuit that has not been completely drained by the drainage unit;

[0025] Controlling the drainage unit to communicate with the secondary circuit, and controlling the drainage unit to extract the coolant in the secondary circuit;

[0026] The drying unit is controlled to be connected to the secondary circuit, and the drying unit is controlled to dry the coolant in the secondary circuit that has not been completely drained by the drainage unit.

[0027] In a third aspect, an embodiment of the present invention provides a liquid cooling system, comprising a primary side circuit, a secondary side circuit, and a liquid discharge device as described in any one of the above-mentioned first aspects.

[0028] In a fourth aspect, an embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the control method of the liquid discharge device as described in the second aspect when executing the computer program.

[0029] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the control method of the liquid discharge device as described in the second aspect is implemented.

[0030] In a sixth aspect, an embodiment of the present invention provides a computer program product. When the computer program product is run on an electronic device, the electronic device executes the control method of the liquid discharge device described in the second aspect.

[0031] Compared with the related art, the embodiments of the present invention have the following beneficial effects:

[0032] The embodiment of the present invention provides a drainage device, which is applied to a liquid cooling system, and the liquid cooling system includes a primary circuit and a secondary circuit; the drainage device includes a drainage unit and a drying unit arranged between the primary circuit and the secondary circuit, the drainage unit is used to extract the coolant in the primary circuit and the secondary circuit, and the drying unit is used to dry the coolant in the primary circuit and the secondary circuit that has not been completely drained by the drainage unit. The present invention arranges the drainage device between the primary circuit and the secondary circuit, and can complete the drainage and drying of the primary circuit and the secondary circuit with only one set of drainage devices, and can ensure that the coolant in the primary circuit and the secondary circuit is completely drained.

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

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 is a schematic diagram of an application scenario of a liquid discharge device provided by an embodiment of the present invention;

[0037] Figure 2 is a schematic structural diagram of a liquid discharge device provided by an embodiment of the present invention;

[0038] Figure 3 is a flow chart of a control method of a liquid discharge device provided by an embodiment of the present invention;

[0039] Figure 4 is a schematic structural diagram of a liquid discharge device provided by another embodiment of the present invention;

[0040] Figure 5 is a flow chart of a control method of a liquid discharge device provided by another embodiment of the present invention;

[0041] Figure 6 is a schematic structural diagram of a liquid discharge device provided by yet another embodiment of the present invention;

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

[0043] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0044] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or their collections. At the same time, in the description of the present specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] References to "one embodiment" or "some embodiments" etc. described in the present specification mean that one or more embodiments of the present invention include a particular feature, structure or characteristic described in conjunction with the embodiment. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0046] The coolant of liquid cooling equipment will be affected by many factors during long-term use, and its performance will gradually decline. On the one hand, the coolant will react chemically with metal parts to produce corrosion, which will not only damage the internal structure of the equipment, but also mix impurities such as metal ions into the coolant, affecting its heat dissipation performance and chemical stability; on the other hand, the coolant will continuously absorb heat during the circulation process, and repeated changes in temperature may cause its additives to decompose or fail, reducing its antifreeze, anti-boiling, anti-scaling and other functions. In addition, bacteria, algae and other microorganisms may breed in the coolant, forming biofilms, blocking the cooling pipes, and affecting the normal flow and heat dissipation effect of the coolant. Therefore, the coolant needs to be replaced regularly. When replacing, the original coolant in the equipment needs to be discharged first, and it should be discharged as much as possible, 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-cooled equipment needs to be drained before transportation to avoid coolant leakage during transportation. Moreover, some coolants may be corrosive or conductive, and leakage may have adverse effects on other items or equipment, or even cause safety accidents.

[0048] In the related art, the drainage method of liquid cooling equipment is usually to drain the liquid through the drainage port of the equipment itself, which makes it 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 circuit of the liquid cooling equipment is drained and purged, and such a drainage device is difficult to meet the drainage needs of the entire liquid cooling equipment.

[0049] Based on the above problems, an embodiment of the present invention provides a drainage device, which is applied to a liquid cooling system including a primary circuit and a secondary circuit. The drainage device includes a drainage unit and a drying unit respectively connected between the primary circuit and the secondary circuit. The drainage unit is used to extract the coolant in the primary circuit and the secondary circuit, and the drying unit is used to dry the coolant in the primary circuit and the secondary circuit that has not been completely drained by the drainage unit. That is, the present invention can drain both the primary circuit and the secondary circuit of the liquid cooling system through only one set of drainage devices, and the drying unit can also ensure that the residual coolant in the circuit is dried to ensure that the coolant is completely drained.

[0050] For example, the embodiments of the present invention can be applied to Figure 1 In the exemplary scenario shown in FIG. 1 , the scenario includes a circuit structure of a liquid cooling system, see Figure 1 The circuit of the liquid cooling system includes a primary circuit 11 and a secondary circuit 12. The primary circuit 11 is composed of a primary pipeline 13 and a cold medium pipeline in a plate heat exchanger 15, and the secondary circuit 12 is composed of a secondary pipeline 14 and a hot medium pipeline in a 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 inside the fins when draining. Figure 1 The scene shown also includes a drainage device 10 in an embodiment of the present invention, which is arranged between the primary side loop 11 and the secondary side loop 12. In this way, when the entire liquid cooling system is drained, the drainage distance of the plate heat exchanger 15 is shorter, which helps to improve the drainage efficiency and drainage 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 invention are described in detail with reference to the accompanying drawings of the specification:

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

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

[0054] The drying unit 22 is connected between the primary circuit 11 and the secondary circuit 12 , and is used to dry the coolant in the primary circuit 11 and the secondary circuit 12 that has not been completely drained by the drainage unit 21 .

[0055] Corresponds to Figure 2 The embodiment of the present invention further provides a control method for the liquid discharge device 10, see Figure 3 , the control method of the liquid discharge device 10 includes:

[0056] Step 301 , controlling the drainage unit 21 to communicate with the primary-side loop 11 , and controlling the drainage unit 21 to extract the coolant in the primary-side loop 11 .

[0057] Step 302 , controlling the drying unit 22 to communicate with the primary circuit 11 , and controlling the drying unit 22 to dry the coolant in the primary circuit 11 that has not been completely drained by the drainage unit 21 .

[0058] Step 303 , controlling the drainage unit 21 to communicate with the secondary circuit 12 , and controlling the drainage unit 21 to extract the coolant in the secondary circuit 12 .

[0059] Step 304 , controlling the drying unit 22 to communicate with the secondary circuit 12 , and controlling the drying unit 22 to dry the coolant in the secondary circuit 12 that has not been completely drained by the drainage unit 21 .

[0060] In the above embodiment, when draining a certain side circuit, the drainage unit 21 is first controlled to be connected to the side circuit to extract the coolant, and then the residual coolant is dried by the drying unit 22, thereby achieving the drainage and drying of the entire liquid cooling system to ensure that there is no residual liquid in the pipeline. It can be understood that in actual applications, the primary side can be drained and dried first, or the secondary side can be drained and dried first, and the exchange of this order does not affect the drainage effect of the liquid cooling system.

[0061] Furthermore, the liquid cooling system in the embodiment of the present invention may include a primary side pipeline 13, a plate heat exchanger 15 and a secondary side pipeline 14, and the plate heat exchanger 15 includes a cold medium pipeline and a hot medium pipeline. The primary side loop 11 is composed of the primary side pipeline 13 and the cold medium pipeline, and the secondary side loop 12 is composed of the secondary side pipeline 14 and the hot medium pipeline. Figure 1 shown.

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

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

[0064] See also Figure 3 The primary side circuit 11 may be provided with a primary side liquid discharge port and a primary side air inlet port; the secondary side circuit 12 may be provided with a secondary side liquid discharge port and a secondary side air inlet port.

[0065] The drainage unit 21 may include a first drainage valve 41 and a second drainage valve 42. The first drainage valve 41 is connected to the primary drainage port, and the second drainage valve 42 is connected to the secondary drainage port.

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

[0067] In the above embodiment, when the drain device 10 drains the liquid cooling system, the first drain valve 41 or the second drain valve 42 of the drain unit 21 is opened, and the coolant can be extracted from the corresponding circuit by gravity or other power sources. When the drain unit 21 completes the extraction of the coolant, the first drain valve 41 and the second drain valve 42 are closed, and then the first charging valve 43 or the second charging valve 44 is opened to allow the drying gas to be filled into the primary side circuit 11 or the secondary side circuit 12. The drying gas flows in the circuit and takes away the coolant that has not been completely extracted by the drainage unit. By continuously filling in the drying gas until the coolant in the circuit is completely dried, it is ensured that there is no coolant residue in the liquid cooling system.

[0068] Figure 4 A schematic structural diagram of a liquid discharge device 10 provided in a specific embodiment of the present invention is shown.

[0069] See also Figure 4 The drainage unit 21 in this embodiment may include a first drain valve 41, a second drain valve 42, a liquid storage tank 45, a liquid storage tank valve 451 provided at the inlet end of the liquid storage tank 45, and a first gas-liquid dual-purpose pump 46. The drying unit 22 may include a first inflation valve 43, a second inflation valve 44, a first gas-liquid dual-purpose pump 46, a first gas storage tank 47, and a first gas tank valve 471 provided at the outlet end of the first gas storage tank 47. A heating resistor 48 is provided in the first gas storage tank 47 for heating the gas in the first gas storage tank 47.

[0070] Among them, the inlet of the first gas-liquid dual-purpose pump 46 is respectively connected to the outlet of the first discharge valve 41, the second discharge valve 42 and the first gas storage tank 47; the outlet of the first gas-liquid dual-purpose pump 46 is respectively connected to the inlet of the first inflation valve 43, the second inflation valve 44 and the liquid storage tank 45.

[0071] The functions of the above-mentioned liquid discharge device 10 are realized as follows:

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

[0073] When the first air vent, the first air charging valve 43, and the first gas tank valve 471 are opened, and the second air charging valve 44, the liquid storage tank valve 451, the first liquid discharge valve 41, and the second liquid discharge valve 42 are closed, the heated gas in the first gas storage tank 47 is charged into the primary side circuit 11 through the first gas-liquid dual-purpose pump 46 to dry the coolant that has not been discharged in the primary side circuit 11.

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

[0075] When the second air vent, the second air charging valve 44, and the first gas tank valve 471 are opened, and the first air charging valve 43, the liquid storage tank valve 451, the first liquid discharge valve 41, and the second liquid discharge valve 42 are closed, the heated gas in the first gas storage tank 47 is charged into the secondary side circuit 12 through the first gas-liquid dual-purpose pump 46 to dry the coolant that has not been discharged in the secondary side circuit 12.

[0076] Among them, the first vent is an air hole set on the primary side circuit 11, and the second vent is an air hole set on the secondary side circuit 12. The first vent and the second vent can be the original drainage ports in the primary side circuit 11 and the secondary side circuit 12, and can also be air holes specially set for ventilation on the primary side circuit 11 and the secondary side circuit 12. During drying, the corresponding air holes can be opened to maintain the air pressure balance inside and outside the system, and the water vapor formed by the evaporation of the coolant under the heating of the gas can be discharged through the air holes to ensure that the circuit is dry.

[0077] In the above embodiment, the first drain valve 41 is connected to the primary drain port, and the second drain valve 42 is connected to the secondary drain port, so that the coolant can be discharged from the primary circuit 11 and the secondary circuit 12 respectively. When the corresponding drain valve and the liquid storage tank valve 451 are opened and the other valves are closed, the coolant can flow smoothly from the corresponding circuit into the drainage unit 21, and with the help of the suction action of the first gas-liquid dual-purpose pump 46, it is efficiently pumped into the liquid storage tank 45, so that the coolant of different circuits can be discharged independently and accurately, and the accuracy and efficiency of the discharge are improved. A heating resistor 48 is arranged in the first gas storage tank 47, which can heat the gas in the tank. In the drying stage, when the corresponding vent, the charging valve and the first gas tank valve 471 are opened and the other valves are closed, the heated gas can be filled into the corresponding circuit through the first gas-liquid dual-purpose pump 46, and the heat of the hot gas is used to evaporate the unexhausted coolant, thereby realizing the drying treatment of the circuit, effectively removing the residual coolant, and avoiding the adverse consequences such as corrosion to the circuit and affecting the performance.

[0078] It should be noted that the above-mentioned drainage 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 dual-purpose pump 46, and improve the pumping efficiency.

[0079] based on Figure 4 In the embodiment shown, the liquid cooling system in the embodiment of the present invention may further include a first liquid level sensor and a second liquid level sensor. The first liquid level sensor may be used to detect the liquid level in the primary circuit 11, and the second liquid level sensor may be used to detect the liquid level in the secondary circuit 12.

[0080] Correspondingly, the liquid discharge device 10 may further include a control unit, which is used to control the second charging valve 44, the liquid storage tank valve 451, the first liquid discharge valve 41, and the second liquid discharge valve 42 to be closed, and control the first vent, the first charging valve 43, and the first gas tank valve 471 to be opened when the first liquid discharge instruction is received and the detection value of the first liquid level sensor is lower than the preset liquid level. It is also used to control the first charging valve 43, the liquid storage tank valve 451, the first liquid discharge valve 41, and the second liquid discharge valve 42 to be closed, and control the second vent, the second charging valve 44, and the first gas tank valve 471 to be opened when the second liquid discharge instruction is received and the detection value of the second liquid level sensor is lower than the preset liquid level.

[0081] The first drain instruction is used to instruct the primary side circuit 11 to drain; the second drain instruction is used to instruct the secondary side circuit 12 to drain.

[0082] In this embodiment, each valve in the liquid discharge device 10 can be an electric valve, and each 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 its monitoring data to the control unit in real time, and the second liquid level sensor can monitor the liquid level of the secondary side circuit 12 in real time, and also send its monitoring data to the control unit in real time.

[0083] In this embodiment, when the control unit receives the first drainage instruction, the first drainage valve 41 and the liquid storage tank valve 451 are controlled to open, and the remaining valves are controlled to close to extract the coolant in the primary side circuit 11. In this process, when the detection value of the first liquid level sensor is detected to be lower than the preset liquid level, the first vent, the first charging valve 43, and the first gas tank valve 471 are controlled to open, and the remaining valves are controlled to close to dry the coolant remaining in the primary side circuit 11, thereby realizing automatic drainage and drying of the primary side circuit 11. When the control unit receives the second drainage instruction, the second drainage valve 42 and the liquid storage tank valve 451 are controlled to open, and the remaining valves are controlled to close to extract the coolant in the secondary side circuit 12. In this process, when the detection value of the second liquid level sensor is detected to be lower than the preset liquid level, the second vent, the second charging valve 44, and the first gas tank valve 471 are controlled to open, and the remaining valves are controlled to close to dry the coolant remaining in the secondary side circuit 12, thereby realizing automatic drainage and drying of the secondary side circuit 12.

[0084] Corresponding to the above-mentioned liquid discharge device 10, the embodiment of the present invention further provides a control method of the liquid discharge device 10, such as Figure 5 As shown, the control method includes:

[0085] Step 501, when the first liquid discharge instruction is received, the first liquid discharge valve 41 and the liquid storage tank valve 451 are controlled to be opened, and the second liquid discharge valve 42, the first air charging valve 43, the second air charging valve 44 and the first air tank valve 471 are controlled to be closed.

[0086] Step 502 , after the first liquid discharge valve 41 and the liquid storage tank valve 451 are opened, the first gas-liquid dual-purpose pump 46 is controlled to operate in the liquid pump mode to pump liquid from the primary side circuit 11 .

[0087] Step 503, during the process of pumping liquid from the primary side circuit 11, when the detection value of the first liquid level sensor is lower than the preset liquid level, the first drain valve 41 and the liquid storage tank valve 451 are controlled to be closed, and the first air vent, the first inflation valve 43, and the first gas tank valve 471 are controlled to be opened, and at the same time, the first gas-liquid dual-purpose pump 46 is controlled to switch from the liquid pump mode to the gas pump mode, and the gas in the first gas tank 47 is pumped into the primary side circuit 11 to dry the coolant that has not been completely pumped out in the primary side circuit 11.

[0088] Step 504, when receiving the second liquid discharge instruction, the second liquid discharge valve 42 and the liquid storage tank valve 451 are controlled to open, and the first liquid discharge valve 41, the first air charging valve 43, the second air charging valve 44 and the first air tank valve 471 are controlled to close.

[0089] Step 505 , after the second liquid discharge valve 42 and the liquid storage tank valve 451 are opened, the first gas-liquid dual-purpose pump 46 is controlled to operate in the liquid pump mode to pump liquid from the secondary side circuit 12 .

[0090] Step 506, during the process of pumping liquid from the secondary side circuit 12, when the detection value of the second liquid level sensor is lower than the preset liquid level, the second drain valve 42 and the liquid storage tank valve 451 are controlled to be closed, and the second vent, the second inflation valve 44, and the first gas tank valve 471 are controlled to be opened, and at the same time, the first gas-liquid dual-purpose pump 46 is controlled to switch from the liquid pump mode to the gas pump mode, and the gas in the first gas tank 47 is pumped into the secondary side circuit 12 to dry the coolant that has not been completely pumped out in the secondary side circuit 12.

[0091] The control method of the liquid discharge device 10 in the above embodiment can realize the effective discharge and drying of the coolant in the primary circuit 11 and the secondary circuit 12, and has the following significant effects:

[0092] 1) It can achieve efficient liquid drainage. When the corresponding liquid drainage instruction is received, the corresponding liquid drainage valve and liquid storage tank valve 451 can be opened quickly and accurately, and irrelevant valves can be closed at the same time to ensure that the liquid drainage path is unobstructed. Then the first gas-liquid dual-purpose pump 46 is controlled to operate in the liquid pump mode, and the suction action of the pump is used to pump liquid from the primary side circuit or the secondary side circuit. This targeted control enables the coolant to be quickly and efficiently extracted from the corresponding circuit and discharged into the designated liquid storage tank, thereby improving the liquid drainage efficiency and reducing the time and energy consumption required for liquid drainage.

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

[0094] 3) Effective drying can be achieved. When the liquid level reaches a preset low level, the first gas-liquid dual-purpose pump 46 is automatically switched to the air pump mode, and the corresponding vent, the charging valve and the first gas tank valve 471 are opened to pump the gas in the first gas tank 47 into the circuit. The introduction of gas can effectively dry the coolant that has not been completely pumped out in the circuit, avoiding the adverse effects of corrosion and scaling on the circuit caused by the residual coolant, helping to keep the circuit clean and stable, and extending the service life of the system.

[0095] 4) The two side circuits operate independently, with high flexibility. For the primary side circuit and the secondary side circuit, they can perform their own drainage and drying operations according to the independent drainage instructions received. This independent circuit control method makes the system more flexible and operable, can meet the coolant processing requirements of different circuits under different working conditions, and improves the system's adaptability to complex working environments.

[0096] In summary, the control method in the above embodiment can achieve efficient and accurate discharge and drying of the coolant in the primary loop 11 and the secondary loop 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 FIG. 1 is a schematic structural diagram of a liquid discharge device 10 provided in another specific embodiment of the present invention.

[0098] See also Figure 6 The drainage unit 21 may include a first drain valve 41, a second drain valve 42, a liquid storage tank 45, a liquid storage tank valve 451 disposed at the inlet end of the liquid storage tank 45, a second gas-liquid dual-purpose pump 62, and a third gas-liquid dual-purpose pump 63. The drying unit 22 may include a first inflation valve 43, a second inflation valve 44, a second gas-liquid dual-purpose pump 62, a third gas-liquid dual-purpose pump 63, a second gas storage tank 64, a second gas tank valve 641 disposed at the outlet end of the second gas storage tank 64, a third gas storage tank 65, and a third gas tank valve 651 disposed at the outlet end of the third gas storage tank 65.

[0099] The second gas storage tank 64 and the third gas storage tank 65 both 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] like Figure 6As shown, the inlet of the second gas-liquid dual-purpose pump 62 is respectively connected to the first end of the first liquid discharge valve 41, the second gas tank valve 641 and the third valve 68; the outlet of the second gas-liquid dual-purpose pump 62 is respectively connected to the first end of the first charging valve 43 and the first valve 66. The inlet of the third gas-liquid dual-purpose pump 63 is respectively connected to the second end of the second liquid discharge valve 42, the third gas tank valve 651 and the third valve 68; the outlet of the third gas-liquid dual-purpose pump 63 is respectively connected to the first end of the second charging valve 44 and the second valve 67. The liquid storage tank valve 451 is respectively connected to the second end of the first valve 66 and the second end of the second valve 67.

[0101] The liquid discharge device 10 in this embodiment is provided with two gas-liquid dual-purpose pumps, and various liquid discharge modes can be realized by opening and closing the valves. For example, the two side loops can be simultaneously drained and dried through a gas-liquid dual-purpose pump; for another example, any side loop can be drained and dried through two gas-liquid dual-purpose pumps; for another example, one side loop discharges liquid through a gas-liquid dual-purpose pump while the other side loop dries the residual liquid in the loop through another gas-liquid dual-purpose pump. The following describes the liquid discharge process of these liquid discharge modes respectively:

[0102] Drainage mode 1: Both sides of the circuit are drained and dried simultaneously through a gas-liquid dual-purpose pump.

[0103] The first drain valve 41, the second drain valve 42, the first valve 66, the second valve 67 and the liquid storage tank valve 451 are opened, and the first charging valve 43, the second charging 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 dual-purpose pump 62 and the third gas-liquid dual-purpose pump 63 are started to operate in the liquid pump mode, and the coolant in the primary side circuit 11 is pumped into the liquid storage tank 45 through the second gas-liquid dual-purpose pump 62, and the coolant in the secondary side circuit 12 is pumped into the liquid storage tank 45 through the third gas-liquid dual-purpose pump 63.

[0104] When the liquid levels of the primary circuit 11 and the secondary circuit 12 both drop to a certain level, the first vent, the second vent, the first charging valve 43, the second charging valve 44, the second gas tank valve 641 and the third gas tank valve 651 are opened, and the first drain valve 41, the second drain valve 42, the first valve 66, the second valve 67, the third valve 68 and the liquid storage tank valve 451 are closed. The second gas-liquid dual-purpose pump 62 and the third gas-liquid dual-purpose pump 63 are started to operate in the liquid pump mode, and the gas in the second gas storage tank 64 is charged into the primary circuit 11 through the second gas-liquid dual-purpose pump 62 to dry the coolant that has not been exhausted in the primary circuit 11, and the gas in the third gas storage tank 65 is charged into the secondary circuit 12 through the third gas-liquid dual-purpose pump 63 to dry the coolant that has not been exhausted in the secondary circuit 12.

[0105] This drainage mode is suitable for the scenario where both sides of the circuit need to be drained at the same time. Both sides of the circuit can be drained and dried at the same time, which can improve the drainage efficiency. At the same time, the above drainage mode 1 is also suitable for the scenario where only one side of the circuit needs to be drained. In this case, only the valve and gas-liquid dual-purpose pump on one side need to be opened.

[0106] Drainage mode 2: One side of the circuit is drained and dried through two gas-liquid dual-purpose pumps.

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

[0108] The first drain valve 41, the liquid storage tank valve 451, the first valve 66, the second valve 67 and the third valve 68 are opened, and the first charging valve 43, the second charging valve 44, the second drain valve 42, the second gas tank valve 641 and the third gas tank valve 651 are closed. The second gas-liquid dual-purpose pump 62 and the third gas-liquid dual-purpose pump 63 are started to operate in the liquid pump mode, and the coolant in the primary side circuit 11 is pumped into the liquid storage tank 45 through the second gas-liquid dual-purpose pump 62 and the third gas-liquid dual-purpose pump 63.

[0109] When the liquid level of the primary loop 11 drops to a certain level, the first drain valve 41, the liquid storage tank valve 451 and the third valve 68 are closed, the second gas tank valve 641, the third gas tank valve 651 and the first charging valve 43 are opened, and the other valves remain the same, and the second gas-liquid dual-purpose pump 62 and the third gas-liquid dual-purpose pump 63 are switched to the gas pump mode. The high-temperature gas in the second gas storage tank 64 is charged into the primary loop 11 through the second gas-liquid dual-purpose pump 62, and the high-temperature gas in the third gas storage tank 65 is charged into the primary loop 11 through the third gas-liquid dual-purpose pump 63, and the remaining coolant in the primary loop 11 is dried.

[0110] The above-mentioned drainage mode 2 is suitable for liquid cooling systems with a large drainage volume or scenarios with limited drainage time.

[0111] For example, when draining the cooling circulation loop of large-scale steel smelting equipment, due to the large scale of the primary side loop, complex pipelines and large coolant reserves, the use of two gas-liquid dual-purpose pumps working together can speed up the drainage speed and improve maintenance efficiency. When the equipment needs to be planned for maintenance or overhaul, and the primary side loop needs to be emptied and dried, this drainage mode can handle large amounts of coolant more efficiently. In addition, large equipment has higher requirements for drying. By supplying gas through two gas tanks, more sufficient high-temperature gas can be provided to ensure that the coolant residue in the complex pipeline is thoroughly dried, preventing rust or corrosion of equipment parts due to coolant residue, thereby ensuring the stability and reliability of the equipment in subsequent operation.

[0112] For another example, large transformers and other equipment in power substations use liquid cooling systems to maintain normal operating temperatures. When maintaining the primary cooling circuit of these devices, the coolant needs to be drained and the circuit needs to be dried. Due to the importance of power equipment and the strict requirements for operational stability, the use of two gas-liquid dual-purpose pumps working simultaneously can complete the drainage process in a shorter time, reduce equipment downtime, and reduce the impact on power supply. At the same time, sufficient high-temperature gas drying can effectively remove moisture from the circuit, avoid electrical failures caused by humid environments, such as short circuits and leakage, and ensure the safe and stable operation of the power system.

[0113] Drainage mode three: One side of the circuit drains the liquid while the other side of the circuit dries the residual liquid.

[0114] Take the draining of the primary circuit 11 and the drying of the secondary circuit 12 as an example:

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

[0116] The application scenario of the above-mentioned drainage mode three may be when the liquid level of the secondary side loop 12 has dropped to a preset liquid level, while the liquid level of the primary side loop 11 is still relatively high. At this time, the drainage device 10 can be controlled to continue to pump liquid from the primary side loop 11 while drying the secondary side loop 12.

[0117] It should be understood that Figure 6 The control method of the drainage device 10 shown can be flexibly selected according to actual conditions. For example, multiple drainage modes can be preset in the main control unit of the drainage device 10, and the main control unit can select the corresponding drainage mode according to the drainage mode instruction input by the user to flexibly control the valve and the pump, thereby meeting multiple drainage requirements and improving the drainage efficiency of the liquid cooling system.

[0118] In some embodiments, based on Figure 6The shown discharge device 10 can also be provided with two liquid storage tanks 45, one for storing the coolant discharged from the primary loop 11, and the other for storing the coolant discharged from the secondary loop 12. In this way, when the coolant components in the primary loop 11 and the secondary loop 12 are different, the two coolants can be stored separately, and when the discharged coolant meets the performance requirements, it can also be reused in subsequent production and debugging processes, thereby avoiding the problem of different coolants being mixed and unable to be reused, which helps to reduce costs.

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

[0120] The embodiment of the present invention further provides an electronic device, see Figure 7 The electronic device 70 of this embodiment includes: a processor 71 and a memory 72. The memory 72 stores a computer program. When the processor 71 executes the computer program, the steps in the above-mentioned various method embodiments are implemented.

[0121] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory 72 and executed by the processor 71 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, and the instruction segments are used to describe the execution process of the computer program in the electronic device 70.

[0122] The electronic device 70 may include, but is not limited to, a processor 71 and a memory 72. Those skilled in the art will appreciate that Figure 7 It is only an example of the electronic device 70 and does not constitute a limitation of the electronic device 70. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device 70 may also include input and output devices, network access devices, buses, etc.

[0123] The processor 71 may be a central processing unit (CPU), or 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. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0124] The memory 72 may be an internal storage unit of the electronic device 70, such as a hard disk or memory of the electronic device 70. The memory 72 may also be an external storage device of the electronic device 70, such as 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 may also include both an internal storage unit of the electronic device 70 and an external storage device. The memory 72 is used to store computer programs and other programs and data required by the electronic device 70. The memory 72 may also be used to temporarily store data that has been output or is to be output.

[0125] For the convenience and simplicity of description, only the division of the above functional modules / units is used as an example for illustration. In actual applications, the above functions can be assigned to different functional modules / units as needed. The above modules / units can be implemented in the form of hardware, software, or a combination of hardware and software.

[0126] The embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the methods in the above method embodiments are implemented.

[0127] The embodiment of the present invention further provides a computer program product, including a computer program. When the computer program is executed by a processor, the methods in the above method embodiments are implemented.

[0128] The computer program includes computer program code, which may be in source code form, object code form, executable file or some intermediate form, etc. Computer readable media may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, 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 emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. If there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form a new embodiment according to their internal logical relationship.

[0130] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A liquid discharge device, characterized in that: Applied to a liquid cooling system, the liquid cooling system includes a primary side circuit and a secondary side circuit; the liquid discharge device includes: A drainage unit, connected between the primary circuit and the secondary circuit, for extracting the coolant in the primary circuit and the secondary circuit; The drying unit is connected between the primary circuit and the secondary circuit, and is used to dry the coolant in the primary circuit and the secondary circuit that has not been completely drained by the drainage unit.

2. The liquid discharge device according to claim 1, characterized in that: The liquid cooling system includes a plate heat exchanger, and the plate heat exchanger includes a cold medium pipeline and a hot medium pipeline; the primary side loop includes the primary side pipeline and the cold medium pipeline constituting the loop, and the secondary side loop includes the secondary side pipeline and the hot medium pipeline constituting the loop; The drainage unit is connected to the primary side pipeline and the secondary side pipeline respectively; The drying unit is connected to the primary side pipeline and the secondary side pipeline respectively.

3. The liquid discharge device according to claim 2, characterized in that: The primary side circuit also includes a primary side drain port, a primary side air inlet port and a first air vent port; the secondary side circuit also includes a secondary side drain port, a secondary side air inlet port and a second air vent port; The drainage unit comprises a first drainage valve and a second drainage valve, wherein the first drainage valve is connected to the primary drainage port, and the second drainage valve is connected to the secondary drainage port; The drying unit includes a first inflation valve, a second inflation valve and drying gas, the first inflation valve is connected to the primary side air inlet, the second inflation valve is connected to the secondary side air inlet, and the drying gas is used to dry the coolant in the primary side circuit and the secondary side circuit that has not been drained by the drainage unit.

4. The liquid discharge device according to claim 3, characterized in that: The drainage unit further includes a liquid storage tank and a first gas-liquid dual-purpose pump; the drying unit further includes the first gas-liquid dual-purpose pump and a first gas storage tank; a heating resistor is provided in the first gas storage tank for heating the gas in the first gas storage tank; the inlet of the first gas-liquid dual-purpose pump is respectively connected to the first liquid discharge valve, the second liquid discharge valve and the outlet of the first gas storage tank; the outlet of the first gas-liquid dual-purpose pump is respectively connected to the first inflation valve, the second inflation valve and the inlet of the liquid storage tank; The liquid discharge device further comprises a first gas tank valve arranged at the outlet end of the first gas tank, and a liquid tank valve arranged at the inlet end of the liquid tank.

5. The liquid discharge device according to claim 4, characterized in that: When the first drain valve and the valve of the liquid storage tank are opened, and the first charging valve, the second charging valve, the second drain valve, and the first gas tank valve are closed, the coolant in the primary circuit flows into the drain unit and is pumped into the liquid storage tank by the first gas-liquid dual-purpose pump; When the first vent, the first charging valve, and the first gas tank valve are opened, and the second charging valve, the liquid storage tank valve, the first drain valve, and the second drain valve are closed, the heated gas in the first gas storage tank is charged into the primary side circuit through the first gas-liquid dual-purpose pump to dry the coolant that has not been completely drained in the primary side circuit; When the second drain valve and the valve of the liquid storage tank are opened, and the first charging valve, the second charging valve, the first drain valve, and the first gas tank valve are closed, the coolant in the secondary circuit flows into the drain unit and is pumped into the liquid storage tank by the first gas-liquid dual-purpose pump; When the second air vent, the second air charging valve, and the first gas tank valve are opened, and the first air charging valve, the liquid storage tank valve, the first drain valve, and the second drain valve are closed, the heated gas in the first gas storage tank is charged into the secondary side circuit through the first gas-liquid dual-purpose pump to dry the coolant that has not been completely discharged in the secondary side circuit.

6. The liquid discharge device according to claim 4, characterized in that: The liquid cooling system further includes a first liquid level sensor and a second liquid level sensor; the first liquid level sensor is used to detect the liquid level in the primary side circuit, and the second liquid level sensor is used to detect the liquid level in the secondary side circuit; the liquid discharge device further includes a control unit; The control unit is used for: When the first liquid discharge instruction is received and the detection value of the first liquid level sensor is lower than the preset liquid level, the second gas charging valve, the liquid storage tank valve, the first liquid discharge valve and the second liquid discharge valve are controlled to be closed, and the first vent, the first gas charging valve and the first gas tank valve are controlled to be opened; wherein the first liquid discharge instruction is used to instruct the primary side circuit to be drained; When the second drain instruction is received and the detection value of the second liquid level sensor is lower than the preset liquid level, the first inflation valve, the liquid storage tank valve, the first drain valve, and the second drain valve are controlled to be closed, and the second vent, the second inflation valve, and the first gas tank valve are controlled to be opened; wherein, the second drain instruction is used to instruct the draining of the secondary side circuit.

7. The liquid discharge device according to claim 3, characterized in that: 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; the second gas storage tank and the third gas storage tank both store gas with a temperature higher than a preset temperature; the liquid discharge device further includes a second gas tank valve, a third gas tank valve, a first valve, a second valve and a third valve, the liquid storage tank valve is arranged at the inlet end of the liquid storage tank, the second gas tank valve is arranged at the outlet end of the second gas tank, and the third gas tank valve is arranged at the outlet end of the third gas tank; The inlet of the second gas-liquid dual-purpose pump is respectively connected to the first liquid discharge valve, the second gas tank valve and the first end of the third valve; the outlet of the second gas-liquid dual-purpose pump is respectively connected to the first inflation valve and the first end of the first valve; The inlet of the third gas-liquid dual-purpose pump is respectively connected to the second liquid discharge valve, the third gas tank valve and the second end of the third valve; the outlet of the third gas-liquid dual-purpose pump is respectively connected to the second inflation valve and the first end of the second valve; The liquid storage tank valve is connected to the second end of the first valve and the second end of the second valve respectively.

8. The liquid discharge device according to claim 7, characterized in that: When the first drain valve, the second drain valve, the first valve, the second valve and the liquid storage tank valve are opened, and the first charging valve, the second charging valve, the third valve, the second gas tank valve and the third gas tank valve are closed, the coolant in the primary circuit is pumped into the liquid storage tank by the second gas-liquid dual-purpose pump, and the coolant in the secondary circuit is pumped into the liquid storage tank by the third gas-liquid dual-purpose pump; When the first air vent, the second air vent, the first inflation valve, the second inflation valve, the second gas tank valve and the third gas tank valve are opened, and the first drain valve, the second drain 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 through the second gas-liquid dual-purpose pump to dry the coolant that has not been completely pumped out in the primary side circuit, and the gas in the third gas storage tank is charged into the secondary side circuit through the third gas-liquid dual-purpose pump to dry the coolant that has not been completely pumped out in the secondary side circuit.

9. A method for controlling a liquid discharge device, characterized in that: Applied to a liquid cooling system, the liquid cooling system includes a primary side circuit and a secondary side circuit; the drainage device includes a drainage unit and a drying unit arranged between the primary side circuit and the secondary side circuit; the control method includes: Controlling the drainage unit to communicate with the primary circuit, and controlling the drainage unit to extract the coolant in the primary circuit; Controlling the drying unit to be connected to the primary circuit, and controlling the drying unit to dry the coolant in the primary circuit that has not been completely drained by the drainage unit; Controlling the drainage unit to communicate with the secondary circuit, and controlling the drainage unit to extract the coolant in the secondary circuit; The drying unit is controlled to be connected to the secondary circuit, and the drying unit is controlled to dry the coolant in the secondary circuit that has not been completely drained by the drainage unit.

10. A liquid cooling system, characterized in that: It comprises a primary side circuit, a secondary side circuit and a liquid discharge device as claimed in any one of claims 1 to 8.

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