Liquid cooling switching method and system

Abstract

The disclosed embodiments provide a liquid cooling switching method and system, which relates to the field of cooling technology, in order to solve the problem of difficulty in later maintenance of liquid cooling systems in the prior art. Specifically, it includes: a cold source switching device, a cooling tower, a temperature sensor, a liquid supply pipe, a liquid return pipe and a control device placed in a liquid cooling switching cabinet; one end of the cold source switching device is connected to both the liquid supply pipe and the liquid return pipe, and the cooling tower is connected to the other end of the cold source switching device, which is used to cool down the phase change medium transported through the cold source switching device; the temperature sensor is placed outside the liquid cooling switching cabinet, which is used to measure the ambient temperature; the control device is connected to the cold source switching device, which is used to obtain the ambient temperature, determine the type of working condition according to the ambient temperature and the preset threshold, and send a control instruction to the cold source switching device according to the type of working condition, and the control instruction is used to control the cold source switching device to execute the corresponding working condition.

Description

Technical Field

[0001] The present disclosure relates to the field of cooling technology, and in particular to a liquid cooling switching method and system. Background Art

[0002] At present, the cold source systems corresponding to the liquid cooling method include mechanical compression refrigeration system and natural cold source system. However, the mechanical compression refrigeration system and the natural cold source system are set up independently, which makes the subsequent maintenance difficult. Summary of the invention

[0003] The present disclosure provides a liquid cooling switching method and system to solve the problem of difficulty in subsequent maintenance of the liquid cooling system in the prior art.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present disclosure provides a liquid cooling switching system, comprising: a cold source switching device, a cooling tower, a temperature sensor, a liquid supply pipe, a liquid return pipe and a control device placed in a liquid cooling switching cabinet; one end of the cold source switching device is connected to both the liquid supply pipe and the liquid return pipe, the cold source switching device is used to cool the phase change working medium when the return pipe inputs the phase change working medium into the cold source switching device, and transport the cooled phase change working medium to the cooling tower; when the cooling tower outputs the phase change working medium to the cold source switching device, the phase change working medium is cooled again, and the cold source switching device transports the cooled phase change working medium to the liquid supply pipe; the cooling tower is connected to the other end of the cold source switching device, and is used to cool the phase change working medium transported through the cold source switching device; the temperature sensor is placed outside the liquid cooling switching cabinet, and is used to measure the ambient temperature; the control device is connected to the cold source switching device, and is used to obtain the ambient temperature, determine the operating condition type according to the ambient temperature and a preset threshold, and send a control instruction to the cold source switching device according to the operating condition type, and the control instruction is used to control the cold source switching device to execute the corresponding operating condition.

[0006] In a second aspect, the present disclosure provides a liquid cooling switching method, which is applied to a liquid cooling switching system as shown in the first aspect, including: a control module obtains the ambient temperature; the control module determines the type of working condition to be executed based on the ambient temperature and a preset threshold; the control module sends a control instruction to the cold source switching device based on the type of working condition, and the control instruction is used to control the cold source switching device to execute the corresponding working condition.

[0007] The description of the second aspect in the present disclosure may refer to the detailed description of the first aspect; and the beneficial effects described in the second aspect may refer to the analysis of the beneficial effects of the first aspect, which will not be repeated here.

[0008] The technical solution provided by the embodiments of the present disclosure brings at least the following beneficial effects:

[0009] The present disclosure provides a liquid cooling switching method and system, wherein the cold source switching device includes two liquid cooling systems. When the control device obtains the ambient temperature measured by the temperature sensor, the ambient temperature is compared with a preset threshold value to determine the type of working condition to be executed. A control instruction is sent to the cold source switching device according to the type of working condition to control the cold source switching device to execute the corresponding working condition. Since the cold source switching device includes two liquid cooling systems, the control device can directly control the internal switching of the two liquid cooling systems. During later maintenance, the staff only needs to repair the cold source switching device in one place, which solves the problem of low work efficiency caused by independent settings. At the same time, the present structure is simple and easy to implement, with low learning costs and wider applicability.

[0010] These and other aspects of the present disclosure will become more apparent from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 is a structural schematic diagram of a liquid cooling switching system according to an embodiment of the present disclosure;

[0013] Figure 2 is a structural schematic diagram of a cold source switching device according to an embodiment of the present disclosure;

[0014] Figure 3 It is a flow chart of a liquid cooling switching method according to an embodiment of the present disclosure.

[0015] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0016] 1. Liquid cooling switching cabinet; 2. Cold source switching device; 21. First liquid cooling system; 211. First control valve unit; 2111. First control valve; 2112. Second control valve; 2113. Third control valve; 212. First heat exchanger; 213. Mechanical compressor; 214. Condenser; 215. Second control valve unit; 2151. Fourth control valve; 2152. Fifth control valve; 216. Third control valve unit; 2161. Eleventh control valve; 2162. Twelfth control valve; 22. Second liquid cooling system; 221. Fourth control valve unit; 2211. Sixth control valve; 2212. Seventh control valve; 2213. Eighth control valve; 222. Second heat exchanger; 223. Fifth control valve unit; 2231. Ninth control valve; 2232. Tenth control valve; 3. Cooling tower; 4. Temperature sensor; 5. Liquid supply pipe; 6. Liquid return pipe; 7. Control device. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0018] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0019] In the description of the present disclosure, "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0020] The following is an introduction to the concept of a liquid cooling switching method and system provided in this embodiment:

[0021] In the prior art, the cold source system corresponding to the liquid cooling solution is configured with two cold source systems, namely, a mechanical compression refrigeration system and a natural cold source system. In order to solve the problem of difficult maintenance caused by the dispersed settings of the mechanical compression refrigeration system and the natural cold source system, the present disclosure proposes a liquid cooling switching system, which is composed of a liquid cooling switching cabinet 1, a cold source switching device 2, a cooling tower 3, a temperature sensor 4, a liquid supply pipe 5, a liquid return pipe 6 and a control device 7, etc., and integrates the mechanical compression refrigeration system and the natural cold source system into the cold source switching device 2, thereby avoiding the problem of difficult maintenance caused by independent equipment.

[0022] like Figure 1 As shown, it is a structural schematic diagram of a liquid cooling switching system provided in an embodiment of the present disclosure, and the liquid cooling switching system includes: a liquid cooling switching cabinet 1, a cold source switching device 2, a cooling tower 3, a temperature sensor 4, a liquid supply pipe 5, a liquid return pipe 6 and a control device 7.

[0023] Specifically, one end of the cold source switching device 2 is connected to both the liquid supply pipe 5 and the liquid return pipe 6. The cold source switching device 2 is used to cool the phase change working medium when the return pipe 6 inputs the phase change working medium into the cold source switching device 2, and transport the cooled phase change working medium to the cooling tower 3; and when the cooling tower 3 outputs the phase change working medium to the cold source switching device 2, cool the phase change working medium again, and transport the cooled phase change working medium to the liquid supply pipe 5 through the cold source switching device 2.

[0024] The cooling tower 3 is connected to the other end of the cold source switching device 2 and is used to cool the phase-change working medium transported through the cold source switching device 2 .

[0025] The temperature sensor 4 is placed outside the liquid-cooled switching cabinet 1 and is used to measure the ambient temperature.

[0026] The control device 7 is connected to the cold source switching device 2, and is used to obtain the ambient temperature, determine the working condition type according to the ambient temperature, and send a control instruction to the cold source switching device 2 according to the working condition type. The control instruction is used to control the cold source switching device 2 to execute the corresponding working condition.

[0027] In one implementation, the cold source switching device 2 is placed inside the liquid cooling switching cabinet 1, one side of the liquid cooling switching cabinet 1 is connected to the liquid supply pipe 5 and the liquid return pipe 6, and the liquid supply pipe 5 and the liquid return pipe 6 are connected to the cold source switching device 2 through the liquid cooling switching cabinet 1. The control device 7 can be placed inside the liquid cooling switching cabinet 1, or can be independently set, and the control device 7 sends a control instruction to the cold source switching device 2 to control the cold source switching device 2 to execute the corresponding working condition.

[0028] Exemplarily, the control device 7 may be composed of a single chip microcomputer and a related circuit combination, wherein the single chip microcomputer stores computer program instructions for sending control instructions to the cold source switching device 2. These computer program instructions can be implemented by those skilled in the art using existing program codes in specific applications, and will not be described in detail herein.

[0029] At the same time, since the temperature sensor 4 is provided in the embodiment of the present disclosure, the ambient temperature can be monitored in real time. The control device 7 determines the type of working condition to be executed by calling the cold source switching device 2 according to the ambient temperature, further improving the cooling efficiency, and the liquid cooling system corresponding to the cooling scheme of the present disclosure only involves one device, the cold source switching device 2, avoiding the problem of inconvenience in later maintenance caused by the independent setting of multiple liquid cooling systems.

[0030] Further, such as Figure 2 As shown, the cold source switching device 2 includes a first liquid cooling system 21 and a second liquid cooling system 22 .

[0031] One end of the first liquid cooling system 21 is connected to both the liquid supply pipe 5 and the liquid return pipe 6, and the other end of the first liquid cooling system 21 is connected to the cooling tower 3. The first liquid cooling system 21 is used to obtain the control instructions of the control device 7 and execute the corresponding working conditions according to the control instructions.

[0032] One end of the second liquid cooling system 22 is connected to both the liquid supply pipe 5 and the liquid return pipe 6, and the other end of the second liquid cooling system 22 is connected to the cooling tower 3. The second liquid cooling system 22 is used to obtain the control instructions of the control device 7 and execute the corresponding working conditions according to the control instructions.

[0033] Exemplarily, the first liquid cooling system 21 is a mechanical compression refrigeration system, and the second liquid cooling system 22 is a natural cold source system. The first liquid cooling system 21 may also be other cooling systems, and the second liquid cooling system 22 may also be other cooling systems, which is not limited by the present disclosure. By setting two liquid cooling systems in the cold source switching device 2, the problem of difficulty in maintenance and cleaning caused by the independent setting of multiple liquid cooling systems in the prior art is solved, the labor cost is further reduced, and the efficiency of later maintenance is improved.

[0034] In one implementation, the first liquid cooling system 21 includes a first outlet, a first inlet, a second outlet, and a second inlet. The liquid supply pipe 5 is connected to the first outlet, and the liquid return pipe 6 is connected to the first inlet. The second outlet and the second inlet are connected to the cooling tower 3. The natural cooling source system includes a third outlet, a third inlet, a fourth outlet, and a fourth inlet. The liquid supply pipe 5 is connected to the third outlet, and the liquid return pipe 6 is connected to the third inlet.

[0035] The fourth outlet and the fourth inlet are connected to the cooling tower 3 .

[0036] Optional, such as Figure 2As shown, the first liquid cooling system 21 includes a first control valve unit 211, a first heat exchanger 212, a mechanical compressor 213, a condenser 214, a second control valve unit 215 and a third control valve unit 216;

[0037] One end of the first control valve unit 211 is connected to the liquid supply pipe 5 and the liquid return pipe 6 respectively; the other end of the first control valve unit 211 is connected to one end of the first heat exchanger 212; the other end of the first heat exchanger 212 is connected to one end of the mechanical compressor 213 and one end of the condenser 214 respectively, and the other end of the mechanical compressor 213 is connected to one end of the condenser 214; the other end of the condenser 214 is connected to the second control valve unit 215, and the other end of the second control valve unit 215 is connected to the cooling tower 3.

[0038] The first heat exchanger 212 is a device that transfers part of the heat of the hot fluid to the cold fluid, also known as a heat exchanger. Exemplarily, the first heat exchanger 212 is an evaporator.

[0039] The mechanical compressor 213 is a driven fluid machine that boosts low-pressure gas to high-pressure gas and is the heart of the refrigeration system. It sucks low-temperature, low-pressure refrigerant gas from the suction pipe, compresses it by driving the piston through the motor, and discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.

[0040] The condenser 214 is a component of the refrigeration system and a type of heat exchanger. It can convert gas or vapor into liquid and transfer the heat in the pipe to the air near the pipe in a very fast manner.

[0041] Further, such as Figure 2 As shown, the first control valve unit 211 includes a first control valve 2111 , a second control valve 2112 and a third control valve 2113 .

[0042] One end of the first control valve 2111 is connected to the liquid supply pipe 5, the other end of the first control valve 2111 is connected to the first heat exchanger 212, one end of the second control valve 2112 is connected to the liquid return pipe 6, the other end of the second control valve 2112 is connected to one end of the third control valve 2113, and the other end of the third control valve 2113 is connected to the first heat exchanger 212.

[0043] The second control valve unit 215 includes a fourth control valve 2151 and a fifth control valve 2152 .

[0044] The fourth control valve 2151 is located on the return liquid pipe 6, one end of the fourth control valve 2151 is connected to the other end of the condenser 214, and the other end of the fourth control valve 2151 is connected to one end of the cooling tower 3; the fifth control valve 2152 is located on the liquid supply pipe 5, one end of the fifth control valve 2152 is connected to the other end of the condenser 214, and the other end of the fifth control valve 2152 is connected to one end of the cooling tower 3.

[0045] The third control valve unit 216 includes an eleventh control valve 2161 and a twelfth control valve 2162 .

[0046] One end of the eleventh control valve 2161 is connected to one end of the first control valve 2111 and the liquid supply pipe 5 respectively, the other end of the eleventh control valve 2161 is connected to the other end of the second control valve 2112, one end of the third control valve 2113 and one end of the twelfth control valve 2162 respectively, the other end of the twelfth control valve 2162 is connected to one end of the eighth control valve 2213 and one end of the ninth control valve 2231 respectively.

[0047] The first control valve unit 211 is used to control the phase change medium to enter and flow out of the first liquid cooling system 21 , and the second control valve unit 215 is used to control the phase change medium to enter and flow out of the cooling tower 3 through the first liquid cooling system 21 .

[0048] Optional, such as Figure 2 As shown, the second liquid cooling system 22 includes a fourth control valve unit 221 , a second heat exchanger 222 and a fifth control valve unit 223 .

[0049] One end of the fourth control valve unit 221 is connected to the liquid supply pipe 5 and the liquid return pipe 6 respectively; the other end of the fourth control valve unit 221 is connected to one end of the second heat exchanger 222; the other end of the second heat exchanger 222 is connected to one end of the fifth control valve unit 223, and the other end of the fifth control valve unit 223 is connected to one end of the cooling tower 3.

[0050] The second heat exchanger 222 is also a device for transferring part of the heat of the hot fluid to the cold fluid.

[0051] Further, such as Figure 2 As shown, the fourth control valve unit 221 includes a sixth control valve 2211 , a seventh control valve 2212 and an eighth control valve 2213 .

[0052] One end of the sixth control valve 2211 is connected to the liquid return pipe 6, the other end of the sixth control valve 2211 is connected to one end of the second heat exchanger 222, one end of the seventh control valve 2212 is connected to one end of the second heat exchanger 222, the other end of the seventh control valve 2212 is connected to one end of the eighth control valve 2213, and the other end of the eighth control valve 2213 is connected to the liquid supply pipe 5;

[0053] The fifth control valve unit 223 includes a ninth control valve 2231 and a tenth control valve 2232 .

[0054] The ninth control valve 2231 is located on the return liquid pipe 6, one end of the ninth control valve 2231 is connected to the cooling tower 3, and the other end of the ninth control valve 2231 is connected to the other end of the second heat exchanger 222. The tenth control valve 2232 is located on the return liquid pipe 6, one end of the tenth control valve 2232 is connected to the cooling tower 3, and the other end of the tenth control valve 2232 is connected to the other end of the second heat exchanger 222.

[0055] Among them, the fourth control valve unit 221 is used to control the phase change medium to enter and flow out of the second liquid cooling system 22, and the fifth control valve unit 223 is used to control the phase change medium to enter and flow out of the cooling tower 3 through the second liquid cooling system 22.

[0056] Furthermore, the operating condition types determined by the control device 7 include a first operating condition, a second operating condition and a third operating condition.

[0057] The first working condition is that the phase-change working medium first enters the first liquid cooling system 21 from the liquid return pipe 6 for cooling, then enters the cooling tower 3 for cooling, and after cooling, enters the liquid supply pipe 5 through the first liquid cooling system 21 .

[0058] The second working condition is that the phase-change working medium first enters the second liquid cooling system 22 from the liquid return pipe 6 for cooling, then enters the cooling tower 3 for cooling, and after cooling, enters the liquid supply pipe 5 through the second liquid cooling system 22 .

[0059] The third working condition is that the phase change working medium first enters the second liquid cooling system 22 and the cooling tower 3 from the return liquid pipe 6 for cooling, then enters the first liquid cooling system 21 and the cooling tower 3 for cooling, and after cooling, enters the liquid supply pipe 5 through the first liquid cooling system 21.

[0060] In one implementation, the first working condition is that the phase change working fluid is cooled only by the first liquid cooling system 21, the second working condition is that the phase change working fluid is cooled only by the second liquid cooling system 22, and the third working condition is that the phase change working fluid is first cooled by the second liquid cooling system 22 and then by the first liquid cooling system 21; specifically, the first working condition is that the phase change working fluid is cooled only by the mechanical compression refrigeration system, the second working condition is that the phase change working fluid is cooled only by the natural cold source system, and the third working condition is that the phase change working fluid is first cooled by the natural cold source system and then by the mechanical compression refrigeration system.

[0061] In one embodiment, when the control device 7 controls the cold source switching device 2 to open the first control valve unit 211 (the first control valve 2111, the second control valve 2112 and the third control valve 2113) and the second control valve unit 215 (the fourth control valve 2151 and the fifth control valve 2152), and close the third control valve unit 216 (the eleventh control valve 2161 and the twelfth control valve 2162), the fourth control valve unit 221 (the sixth control valve 2211, the seventh control valve 2212 and the eighth control valve 2213) and the fifth control valve unit 223 (the ninth control valve 2231 and the tenth control valve 2232), the first operating condition is executed.

[0062] When the control device 7 controls the cold source switching device 2 to open the fourth control valve unit 221 (sixth control valve 2211, seventh control valve 2212 and eighth control valve 2213) and the fifth control valve unit 223 (ninth control valve 2231 and tenth control valve 2232), and close the first control valve unit 211 (first control valve 2111, second control valve 2112 and third control valve 2113), the second control valve unit 215 (fourth control valve 2151 and fifth control valve 2152) and the third control valve unit 216 (eleventh control valve 2161 and twelfth control valve 2162), the second operating condition is executed.

[0063] When the control device 7 controls the cold source switching device 2 to open the first control valve 2111 and the third control valve 2113 of the first control valve unit 211, the second control valve unit 215 (the fourth control valve 2151 and the fifth control valve 2152), the twelfth control valve 2162 of the third control valve unit 216, the sixth control valve 2211 and the seventh control valve 2212 of the fourth control valve unit 221, and the fifth control valve unit 223 (the ninth control valve 2231 and the tenth control valve 2232), and closes the second control valve 2112 of the first control valve unit 211, the eleventh control valve 2161 of the third control valve unit 216 and the eighth control valve 2213 of the fourth control valve unit 221, the third operating condition is executed.

[0064] Figure 3 is a flow chart of a liquid cooling switching method according to an exemplary embodiment, which is used in the first liquid cooling switching system as described above. Figure 3 As shown, the method may include steps 301 to 303:

[0065] Step 301: The control device 7 obtains the ambient temperature.

[0066] In this step, the ambient temperature measured by the temperature sensor 4 is obtained.

[0067] Step 302: The control device 7 determines the type of operating condition to be executed according to the ambient temperature and a preset threshold value.

[0068] The type of operating condition to be executed is determined based on the ambient temperature and the preset threshold.

[0069] Further, step 302 is as follows:

[0070] When the ambient temperature is greater than a first preset threshold, the operating condition type to be executed is determined to be a first operating condition.

[0071] Combined with the above description, the first working condition is that the phase change working medium first enters the first liquid cooling system 21 from the return liquid pipe 6 for cooling, then enters the cooling tower 3 for cooling, and after cooling, enters the liquid supply pipe 5 through the first liquid cooling system 21.

[0072] When the ambient temperature is less than the second preset threshold, the operating condition type to be executed is determined to be the second operating condition.

[0073] Among them, the second working condition is that the phase change working medium first enters the second liquid cooling system 22 from the return liquid pipe 6 for cooling, then enters the cooling tower 3 for cooling, and after cooling, enters the liquid supply pipe 5 through the second liquid cooling system 22.

[0074] When the ambient temperature is greater than the second preset threshold and less than the first preset threshold, it is determined that the operating condition type to be executed is the third operating condition.

[0075] Among them, the third working condition is that the phase change working medium first enters the second liquid cooling system 22 and the cooling tower 3 from the return liquid pipe 6 for cooling, then enters the first liquid cooling system 21 and the cooling tower 3 for cooling, and after cooling, enters the liquid supply pipe 5 through the first liquid cooling system 21.

[0076] Step 303: The control device 7 sends a control instruction to the cold source switching device 2 according to the working condition type.

[0077] The control instruction is used to control the cold source switching device 2 to execute the corresponding working condition.

[0078] In this step, after determining the type of working condition to be executed, a control instruction corresponding to the working condition type is sent to the cold source switching device 2. If the working condition type is determined to be the first working condition, the control instruction is used to control the cold source switching device 2 to execute the first working condition. If the working condition type is determined to be the second working condition, the control instruction is used to control the cold source switching device 2 to execute the second working condition. If the working condition type is determined to be the third working condition, the control instruction is used to control the cold source switching device 2 to execute the third working condition.

[0079] The present disclosure provides a liquid cooling switching method and system, wherein the cold source switching device includes two liquid cooling systems. When the control device obtains the ambient temperature measured by the temperature sensor, the ambient temperature is compared with a preset threshold value to determine the type of working condition to be executed. A control instruction is sent to the cold source switching device according to the type of working condition to control the cold source switching device to execute the corresponding working condition. Since the cold source switching device includes two liquid cooling systems, the control device can directly control the internal switching of the two liquid cooling systems. During later maintenance, the staff only needs to repair the cold source switching device in one place, which solves the problem of low work efficiency caused by independent settings. At the same time, the present structure is simple and easy to implement, with low learning costs and wider applicability.

[0080] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0081] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A liquid cooling switching system, characterized in that: include: The cold source switching device, cooling tower, temperature sensor, liquid supply pipe, liquid return pipe and control device placed in the liquid cooling switching cabinet; One end of the cold source switching device is connected to both the liquid supply pipe and the liquid return pipe, and the cold source switching device is used to cool the phase-change working medium when the liquid return pipe inputs the phase-change working medium into the cold source switching device, and transport the cooled phase-change working medium to the cooling tower; and when the cooling tower outputs the phase-change working medium to the cold source switching device, the phase-change working medium is cooled again, and the cold source switching device transports the cooled phase-change working medium to the liquid supply pipe; The cooling tower is connected to the other end of the cold source switching device and is used to cool the phase-change working medium transported through the cold source switching device; The temperature sensor is placed outside the liquid-cooled switching cabinet and is used to measure the ambient temperature; The control device is connected to the cold source switching device, and is used to obtain the ambient temperature, determine the operating condition type according to the ambient temperature and a preset threshold, and send a control instruction to the cold source switching device according to the operating condition type, wherein the control instruction is used to control the cold source switching device to execute the corresponding operating condition; The cold source switching device includes a first liquid cooling system and a second liquid cooling system; One end of the first liquid cooling system is connected to both the liquid supply pipe and the liquid return pipe, and the other end of the first liquid cooling system is connected to the cooling tower, and the first liquid cooling system is used to obtain the control instruction of the control device and execute the corresponding working condition according to the control instruction; One end of the second liquid cooling system is connected to both the liquid supply pipe and the liquid return pipe, and the other end of one end of the second liquid cooling system is connected to the cooling tower, and the second liquid cooling system is used to obtain the control instruction of the control device and execute the corresponding working condition according to the control instruction; The operating condition types include a first operating condition and a second operating condition; The first working condition is that the phase-change working medium first enters the first liquid cooling system from the liquid return pipe for cooling, then enters the cooling tower for cooling, and after cooling, enters the liquid supply pipe through the first liquid cooling system; The second working condition is that the phase change working medium first enters the second liquid cooling system from the liquid return pipe for cooling, then enters the cooling tower for cooling, and after cooling, enters the liquid supply pipe through the second liquid cooling system.

2. The system according to claim 1, characterized in that The operating condition type also includes a third operating condition; The third working condition is that the phase change working medium first enters the second liquid cooling system and the cooling tower from the return liquid pipe for cooling, then enters the first liquid cooling system and the cooling tower for cooling, and after cooling, enters the liquid supply pipe through the first liquid cooling system.

3. The system according to claim 1, characterized in that The first liquid cooling system includes a first control valve unit, a first heat exchanger, a mechanical compressor, a condenser, a second control valve unit and a third control valve unit; One end of the first control valve unit is connected to the liquid supply pipe and the liquid return pipe respectively; the other end of the first control valve unit is connected to one end of the first heat exchanger; the other end of the first heat exchanger is connected to one end of the mechanical compressor and one end of the condenser respectively, and the other end of the mechanical compressor is connected to one end of the condenser; the other end of the condenser is connected to the second control valve unit, and the other end of the second control valve unit is connected to the cooling tower.

4. The system according to claim 3, characterized in that The first control valve unit includes a first control valve, a second control valve and a third control valve; One end of the first control valve is connected to the liquid supply pipe, the other end of the first control valve is connected to the first heat exchanger, one end of the second control valve is connected to the liquid return pipe, the other end of the second control valve is connected to one end of the third control valve, and the other end of the third control valve is connected to the first heat exchanger; The second control valve unit includes a fourth control valve and a fifth control valve; The fourth control valve is located on the liquid return pipe, one end of the fourth control valve is connected to the other end of the condenser, and the other end of the fourth control valve is connected to one end of the cooling tower; the fifth control valve is located on the liquid supply pipe, one end of the fifth control valve is connected to the other end of the condenser, and the other end of the fifth control valve is connected to one end of the cooling tower; The third control valve unit includes an eleventh control valve and a twelfth control valve; One end of the eleventh control valve is connected to one end of the first control valve and the liquid supply pipe respectively, the other end of the eleventh control valve is connected to the other end of the second control valve, one end of the third control valve and one end of the twelfth control valve respectively, and the other end of the twelfth control valve is connected to one end of the eighth control valve and one end of the ninth control valve respectively.

5. The system according to claim 1, characterized in that The second liquid cooling system includes a fourth control valve unit, a second heat exchanger and a fifth control valve unit; One end of the fourth control valve unit is connected to the liquid supply pipe and the liquid return pipe respectively; the other end of the fourth control valve unit is connected to one end of the second heat exchanger; the other end of the second heat exchanger is connected to one end of the fifth control valve unit, and the other end of the fifth control valve unit is connected to one end of the cooling tower.

6. The system according to claim 5, characterized in that The fourth control valve unit includes a sixth control valve, a seventh control valve and an eighth control valve; One end of the sixth control valve is connected to the liquid return pipe, the other end of the sixth control valve is connected to one end of the second heat exchanger, one end of the seventh control valve is connected to one end of the second heat exchanger, the other end of the seventh control valve is connected to one end of the eighth control valve, and the other end of the eighth control valve is connected to the liquid supply pipe; The fifth control valve unit includes a ninth control valve and a tenth control valve; The ninth control valve is located on the return pipe, one end of the ninth control valve is connected to the cooling tower, and the other end of the ninth control valve is connected to the other end of the second heat exchanger. The tenth control valve is located on the supply pipe, one end of the tenth control valve is connected to the cooling tower, and the other end of the tenth control valve is connected to the other end of the second heat exchanger.

7. A liquid cooling switching method, applied to a liquid cooling switching system as claimed in any one of claims 1 to 6, characterized in that: include: The control module obtains the ambient temperature; The control module determines the type of working condition to be executed according to the ambient temperature and a preset threshold; The control module sends a control instruction to the cold source switching device according to the working condition type, and the control instruction is used to control the cold source switching device to execute the corresponding working condition.

8. The method according to claim 7, characterized in that The determining the type of working condition to be executed according to the ambient temperature and a preset threshold value includes: When the ambient temperature is greater than a first preset threshold, determining that the operating condition type to be executed is a first operating condition; When the ambient temperature is less than a second preset threshold, determining that the operating condition type to be executed is a second operating condition; When the ambient temperature is greater than the second preset threshold and less than the first preset threshold, it is determined that the operating condition type to be executed is the third operating condition.

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