Liquid cooling device and liquid cooling method

Abstract

The present invention relates to the technical field of heat dissipation of electronic equipment, and in particular to a liquid-cooled heat dissipation device and a liquid-cooled heat dissipation method. When the temperature of a heating device is too high, the phase change material inside a heat storage unit can absorb a certain amount of heat without significantly increasing the temperature, thereby slowing down the heating rate of the coolant, thereby having a good auxiliary effect on the cooling effect of the coolant, stabilizing the temperature of the coolant output by the liquid storage module, and ensuring the effective operation of the liquid-cooled heat dissipation device; at the same time, when the heat dissipation module fails and cannot work normally, and when it is detected that the temperature of the coolant output from the liquid storage module continues to rise, the present invention starts the corresponding mechanical device in the emergency heat storage module, so that a plurality of heat storage units absorb the heat in the liquid storage module in turn, thereby maintaining the stability of the temperature of the coolant output by the liquid storage module, achieving the effect of double heat dissipation protection, and ensuring good heat dissipation and normal operation of the heating device.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation of electronic equipment, and in particular to a liquid cooling heat dissipation device and a liquid cooling heat dissipation method. Background Art

[0002] With the development of electronic technology, the performance and functional requirements of electronic equipment are constantly increasing, the integration of equipment is constantly improving, and the heat flux density of electronic components is also increasing. The research on heat dissipation technology of electronic equipment has attracted widespread attention.

[0003] At present, the heat dissipation of electronic equipment is achieved through various forms of refrigeration and heat exchange, involving many electromechanical devices, among which key devices such as fans and compressors are prone to failure after long-term operation; in addition, with the increase in heat dissipation demand, the complexity of refrigeration and heat exchange systems is also increasing, and with it comes the increasing risk of failure of the heat dissipation system, which brings challenges to the heat dissipation of electronic equipment. According to statistics, 55% of the failure of electronic equipment is caused by temperature. The "10℃ rule" also clearly points out that for every 10℃ increase in the temperature of semiconductor devices, their reliability will decrease by 50%. What's more serious is that once the heat dissipation work cannot operate normally, the temperature of electronic components will rise sharply, not only will the reliability be reduced, but even irreversible damage will occur.

[0004] In view of this, overcoming the defects of the prior art is an urgent problem to be solved in the field of this technology. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to solve the problem that after the current heat dissipation module fails, the temperature of the heat generating device rises sharply and causes irreversible damage.

[0006] The present invention adopts the following technical solution:

[0007] In a first aspect, a liquid cooling device is provided, comprising an emergency heat storage module 1, and a liquid storage module 2, a power module 3 and a heat dissipation module 4 sequentially connected along a pipeline; the emergency heat storage module 1 comprises a plurality of heat storage units 10, the heat storage unit 10 comprises a heat transfer shell 101 and a phase change material 102 arranged in the heat transfer shell 101, and the heat transfer shell 101 is used to contact with the shell of the liquid storage module 2;

[0008] The liquid storage module 2 is used to store the coolant, the power module 3 is used to transport the coolant to the heat generating device for heat absorption, and the heat dissipation module 4 is used to dissipate the heat from the coolant after heat absorption;

[0009] When the heat dissipation module 4 fails, the heat transfer shells 101 on the heat storage units 10 are alternately brought into contact with the shells of the liquid storage modules 2 , and the phase change material 102 therein is used to perform emergency heat dissipation on the coolant in the liquid storage modules 2 .

[0010] Preferably, the emergency heat storage module 1 further includes a slide rail 11, a plurality of connecting rods 103 and a plurality of pulleys 104; the connecting rod 103 is connected to the pulley 104, and the pulley 104 is slidably arranged on the slide rail 11; each of the heat storage units 10 is connected to a corresponding connecting rod 103;

[0011] If the heat absorbed by the phase change material 102 in the current heat storage unit 10 is saturated, the pulley 104 corresponding to the corresponding heat storage unit 10 is controlled to slide on the slide rail 11 so that the heat transfer shell 101 on the corresponding heat storage unit 10 contacts the shell of the liquid storage module 2.

[0012] Preferably, a temperature sensor 12 is provided on each of the heat storage units 10. When the temperature value detected by the temperature sensor 12 reaches a first threshold, the pulley 104 corresponding to the heat storage unit 10 is controlled to slide on the slide rail 11 to switch the current heat storage unit 10.

[0013] Preferably, the heat dissipation module 4 includes a first-stage heat dissipation unit 40, and the first-stage heat dissipation unit 40 includes a first solenoid valve 401, a radiator 402 and a first fan 403;

[0014] The first solenoid valve 401 and the radiator 402 are sequentially arranged in the pipeline between the liquid storage module 2 and the heating device, and the first fan 403 is arranged on one side of the radiator 402;

[0015] When the first solenoid valve 401 is turned on, the coolant flowing through the heat generating device is cooled by air through the radiator 402 and the first fan 403 .

[0016] Preferably, the heat dissipation module 4 further includes a second-stage heat dissipation unit 41, and the second-stage heat dissipation unit 41 includes a second solenoid valve 410, an evaporator 411, a compressor 412 and a condenser 413 sequentially arranged along the pipeline;

[0017] The second solenoid valve 410 is arranged in the pipeline between the liquid storage module 2 and the heating device, and the pipeline between the second solenoid valve 410 and the heating device is arranged in the evaporator 411;

[0018] The evaporator 411 is provided with a refrigerant. When the second solenoid valve 410 is turned on, the coolant flowing through the heat generating device exchanges heat with the refrigerant in the evaporator 411, evaporating the refrigerant into a gaseous state.

[0019] The compressor 412 is used to compress the gaseous refrigerant into the condenser 413 for condensation. The condensed gaseous refrigerant turns back into liquid state, and the liquid refrigerant flows back into the evaporator 411 .

[0020] Preferably, the liquid cooling device further comprises a controller 5, and a temperature detector 6 is further provided on the pipeline between the liquid storage module 2 and the heating device, and the control ends of the temperature detector 6, the first solenoid valve 401 and the second solenoid valve 410 are all connected to the controller 5;

[0021] The controller 5 is used to receive detection data from the temperature detector 6 and control the opening and closing of the first solenoid valve 401 and the second solenoid valve 410 according to the detection data.

[0022] In a second aspect, a liquid cooling method is provided, which is applicable to the liquid cooling device according to the first aspect, comprising:

[0023] The liquid storage module 2 stores the coolant, the power module 3 transports the coolant to the heat generating device for heat absorption, and the heat dissipation module 4 dissipates the heat from the coolant after heat absorption;

[0024] When the heat dissipation module 4 fails, the heat transfer shells 101 on the heat storage units 10 are alternately brought into contact with the shells of the liquid storage modules 2 , and the phase change material 102 therein is used to perform emergency heat dissipation on the coolant in the liquid storage modules 2 .

[0025] Preferably, when the heat dissipation module 4 fails, the heat transfer housing 101 on each of the heat storage units 10 is alternately brought into contact with the housing of the liquid storage module 2, and emergency heat dissipation of the coolant in the liquid storage module 2 is performed through the phase change material 102 therein, including:

[0026] When the heat dissipation module 4 fails and the temperature detector 6 detects that the temperature of the coolant in the circulation pipeline continues to rise, the heat transfer shell 101 on the current heat storage unit 10 is brought into contact with the shell of the liquid storage module 2, and the phase change material 102 in the current heat storage unit 10 absorbs the heat in the liquid storage module 2;

[0027] The temperature of the current heat storage unit 10 is obtained through the temperature sensor 12. When the obtained temperature value is greater than or equal to the first threshold value, the pulley 104 corresponding to the corresponding heat storage unit 10 is controlled to slide on the slide rail 11 to switch the current heat storage unit 10, so that the heat transfer shell 101 on the replaced heat storage unit 10 contacts the shell of the liquid storage module 2, and the phase change material 102 in the replaced heat storage unit 10 absorbs the heat in the liquid storage module 2.

[0028] Preferably, the heat dissipation module 4 includes a first-stage heat dissipation unit 40 and a second-stage heat dissipation unit 41; a temperature detector 6 is also provided on the pipeline between the liquid storage module 2 and the heating device; the power module 3 transports the coolant to the heating device for heat absorption, and the heat dissipation module 4 dissipates the heat of the coolant after heat absorption, specifically including:

[0029] The power module 3 is started, and the first-stage heat dissipation unit 40 dissipates heat from the coolant flowing through the heat generating device, and the coolant after the heat dissipation returns to the liquid storage module 2 for circulation;

[0030] When the temperature value obtained by the temperature detector 6 is less than the second threshold value, the first-stage heat dissipation unit 40 continues to work; when the temperature value obtained by the temperature detector 6 is greater than or equal to the second threshold value, the second-stage heat dissipation unit 41 dissipates the heat of the cooling liquid after absorbing heat, and the cooling liquid returns to the liquid storage module 2 for circulation after the heat dissipation.

[0031] Preferably, the first-stage heat dissipation unit 40 includes a first solenoid valve 401, a radiator 402 and a first fan 403; the second-stage heat dissipation unit 41 includes a second solenoid valve 410; and the method further includes:

[0032] Keep the first fan 403 in a closed state, make the heat transfer housing 101 of the current heat storage unit 10 contact the housing of the liquid storage module 2, and open the first solenoid valve 401 to absorb the heat in the liquid storage module 2 through the phase change material 102 in the current heat storage unit 10;

[0033] The temperature of the current heat storage unit 10 is obtained by the temperature sensor 12 corresponding to the current heat storage unit 10. When the obtained temperature value is greater than or equal to the first threshold value, the pulley 104 corresponding to the next heat storage unit 10 is controlled to slide on the slide rail 11 to switch the current heat storage unit 10, so that the heat transfer shell 101 on the next heat storage unit 10 after replacement contacts with the shell of the liquid storage module 2, and the phase change material 102 in the next heat storage unit 10 after replacement absorbs the heat in the liquid storage module 2;

[0034] When the temperature value acquired by the temperature detector 6 is greater than or equal to the third threshold and less than the second threshold, the first fan 403 is turned on, and the coolant after absorbing heat is dissipated through the radiator 402, and the coolant after heat dissipation returns to the liquid storage module 2 for circulation;

[0035] When the temperature value obtained by the temperature detector 6 is greater than or equal to the second threshold value, the first solenoid valve 401 is closed and the second solenoid valve 410 is opened to dissipate the heat of the cooling liquid after absorbing heat through the second-stage heat dissipation unit 41. The cooling liquid after heat dissipation returns to the liquid storage module 2 for circulation.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] In the present invention, when the temperature of the heating device is too high, the phase change material 102 inside the heat storage unit 10 can absorb a certain amount of heat without significantly increasing the temperature, thereby slowing down the heating rate of the coolant, thereby having a good auxiliary effect on the cooling effect of the coolant, stabilizing the temperature of the coolant output by the liquid storage module 2, and ensuring the effective operation of the liquid-cooled heat dissipation device; at the same time, in the present invention, when the heat dissipation module 4 fails to work normally and detects that the temperature of the coolant output from the liquid storage module 2 is constantly rising, the corresponding mechanical device in the emergency heat storage module 1 is turned on, so that the multiple heat storage units 10 absorb the heat in the liquid storage module 2 in turn, thereby maintaining the stability of the temperature of the coolant output by the liquid storage module 2, achieving the effect of double heat dissipation protection, and ensuring good heat dissipation and normal operation of the heating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be 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 work.

[0039] Figure 1 is a structural schematic diagram of a liquid cooling heat dissipation device provided by an embodiment of the present invention;

[0040] Figure 2 is a structural schematic diagram of an emergency heat dissipation module provided by an embodiment of the present invention;

[0041] Figure 3 is a structural schematic diagram of a first-stage heat dissipation unit provided by an embodiment of the present invention;

[0042] Figure 4 It is a specific structural schematic diagram of a liquid cooling heat dissipation device provided by an embodiment of the present invention;

[0043] Figure 5 It is a schematic diagram of a flow chart of a liquid cooling method provided by an embodiment of the present invention;

[0044] Figure 6 It is a flow chart of another liquid cooling method provided by an embodiment of the present invention.

[0045] In all drawings, like reference numerals refer to like structures, wherein:

[0046] Emergency heat storage module 1, heat storage unit 10, heat transfer shell 101, phase change material 102, connecting rod 103, pulley 104, slide rail 11, temperature sensor 12, liquid storage module 2, power module 3, heat dissipation module 4, first-stage heat dissipation unit 40, first solenoid valve 401, radiator 402, first fan 403, second-stage heat dissipation unit 41, second solenoid valve 410, evaporator 411, compressor 412, condenser 413, drying filter 414, expansion valve 415, second fan 416, controller 5, temperature detector 6. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as open inclusion, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner, that is, although they may be carried in the embodiments or examples of the above terms due to reasons such as the order and position of appearance, it is not limited to that they can be carried in combination by one embodiment or example.

[0049] In the description of the present invention, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "multiple" is two or more. In addition, for example, the same type of nouns may be described as two independent individuals by adding "A" and "B" at the end. In this case, the corresponding features defined as "A" and "B" are only used to distinguish the same type of individuals for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

[0050] When describing some embodiments, the expressions "coupling", "coupling" and "connection" and their derivatives may be used. For example, when describing some embodiments, the term "connection" may be used to indicate that two or more components are in direct physical or electrical contact with each other. For another example, when describing some embodiments, the term "coupling" may be used to indicate that two or more components are in direct physical or electrical contact. However, the terms "connection" or "coupling" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other, such as "optical path coupling", "wireless connection", etc. The embodiments disclosed herein are not necessarily limited to the contents of the present invention.

[0051] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0052] Embodiment 1:

[0053] In order to solve the problem that when a heat dissipation device such as a fan fails, the heat dissipation system collapses and the heat dissipation device cannot be cooled in time, resulting in damage to the heat dissipation device or poor use effect. Embodiment 1 of the present invention provides a liquid cooling device, such as Figure 1 As shown, it includes an emergency heat storage module 1, and a liquid storage module 2, a power module 3 and a heat dissipation module 4 connected in sequence along a pipeline; the emergency heat storage module 1 includes a plurality of heat storage units 10, and the heat storage unit 10 includes a heat transfer shell 101 and a phase change material 102 arranged in the heat transfer shell 101, and the heat transfer shell 101 is used to contact with the shell of the liquid storage module 2; the liquid storage module 2 is used to store coolant, the power module 3 is used to transport the coolant to the heating device for heat absorption, and the heat dissipation module 4 is used to dissipate the heat of the coolant after heat absorption; when the heat dissipation module 4 fails, the heat transfer shell 101 on each of the heat storage units 10 is alternately contacted with the shell of the liquid storage module 2, and the coolant in the liquid storage module 2 is urgently dissipated through the phase change material 102 therein.

[0054] The liquid storage module 2 is the basic part of the entire liquid cooling device, and is mainly used to store coolant. The coolant is a medium for heat transfer. When the system is operating normally, the coolant circulates continuously in the pipeline to absorb the heat generated by the heat generating equipment. The amount of coolant stored in the liquid storage module 2 needs to meet the system's normal operation and emergency use requirements to ensure that there is enough coolant to participate in heat exchange. In one embodiment, the liquid storage module 2 can be a water tank.

[0055] The function of the power module 3 is to provide power for the circulation of the coolant and to deliver the coolant in the liquid storage module 2 to the heat-generating device for heat absorption. The power module 3 is usually composed of a pump or other power device, which can generate sufficient pressure to make the coolant flow quickly and stably in the pipeline, ensuring that the coolant can reach the heat-generating device in time and absorb heat, thereby ensuring the normal operation of the heat dissipation system.

[0056] The heat dissipation module 4 is used to dissipate heat from the cooling liquid after absorbing heat, and generally includes components such as a radiator, a fan and a compressor. In this embodiment, the heat dissipation module 4 includes two levels, namely a first-level heat dissipation unit and a second-level heat dissipation unit, and the specific structure will be described below.

[0057] The emergency heat storage module 1 is a unique design part in this embodiment, which is used to provide emergency heat dissipation function when the heat dissipation module 4 fails, so as to prevent the heat-generating equipment from being damaged due to untimely heat dissipation. The emergency heat storage module 1 includes a plurality of heat storage units 10, each of which includes a heat transfer shell 101 and a phase change material 102. Among them, the heat transfer shell 101 is a medium for heat exchange between the heat storage unit 10 and the liquid storage module 2. It has good thermal conductivity and can quickly transfer the heat of the coolant in the liquid storage module 2 to the internal phase change material 102. Within a certain temperature range, the phase change material 102 will undergo a phase change, for example, from a solid state to a liquid state or from a liquid state to a gas state, and will absorb a large amount of heat during the phase change process. When the heat dissipation module 4 fails, the temperature of the coolant will gradually increase, and the heat will be transferred to the phase change material 102 through the heat transfer shell 101. The phase change material 102 undergoes a phase change and absorbs heat, thereby reducing the temperature of the coolant and providing emergency heat dissipation for the heat-generating equipment for a certain period of time. The method of using the phase change latent heat of the phase change material 102 to dissipate heat has the advantages of high heat storage density and good heat dissipation effect, and can provide effective heat dissipation protection for the heating device when the heat dissipation module 4 fails.

[0058] When the heat dissipation module 4 fails, the system will start the emergency heat dissipation mode. First, the heat transfer shell 101 of the first heat storage unit 10 is brought into contact with the shell of the liquid storage module 2. At this time, the heat of the coolant in the liquid storage module 2 will be transferred to the phase change material 102 in the first heat storage unit 10, and the phase change material 102 begins to absorb heat and undergo a phase change. As time goes by, the phase change material 102 of the first heat storage unit 10 may gradually reach a saturated state and can no longer absorb heat. At this time, the heat transfer shell 101 of the second heat storage unit 10 is brought into contact with the shell of the liquid storage module 2 to continue emergency heat dissipation. Similarly, the heat transfer shell 101 on each heat storage unit 10 is alternately brought into contact with the shell of the liquid storage module 2. Through the coordinated work of multiple heat storage units 10, the emergency heat dissipation time of the heating equipment is extended as much as possible, giving maintenance personnel enough time to repair the heat dissipation module 4 or take other emergency measures.

[0059] In addition to the heat transfer housing 101 being in contact with the housing of the liquid storage module 2 for heat transfer after the heat dissipation module 4 fails, the heat transfer housing 101 of the liquid storage module 2 can also be in contact with the housing of the liquid storage module 2 in the initial state. In the loop composed of the liquid storage module 2, the power module 3 and the heating device, when the heating condition of the heating device is normal (specifically, it can be judged by temperature measurement), heat exchange can be first performed with the liquid storage module 2 through the heat storage unit 10, until the heating condition of the heating device cannot be controlled by the heat storage unit 10, and the temperature continues to rise. At this time, the corresponding heat dissipation module 4 is connected to the loop to cool down the coolant after absorbing heat, so as to have a good auxiliary effect on the cooling effect of the coolant, stabilize the temperature of the coolant output by the liquid storage module 2, and ensure the effective operation of the liquid cooling device.

[0060] In order to realize the switching of all the heat storage units 10, in one embodiment, Figure 2 As shown, the emergency heat storage module 1 also includes a slide rail 11, a plurality of connecting rods 103 and a plurality of pulleys 104; the connecting rod 103 is connected to the pulley 104, and the pulley 104 is slidably arranged on the slide rail 11; each of the heat storage units 10 is connected to the corresponding connecting rod 103; if the heat absorbed by the phase change material 102 in the current heat storage unit 10 is saturated, the pulley 104 corresponding to the corresponding heat storage unit 10 is controlled to slide on the slide rail 11, so that the heat transfer shell 101 on the corresponding heat storage unit 10 is in contact with the shell of the liquid storage module 2.

[0061] The slide rail 11 serves as a basic support and guide structure, providing a sliding path for the pulley 104 corresponding to each heat storage unit 10. The connecting rod 103 serves to connect the pulley 104 and the heat storage unit 10, so that the movement of the pulley 104 can drive the heat storage unit 10 to adjust its position. Each heat storage unit 10 is connected to a corresponding connecting rod 103, and through this connection, the sliding of the pulley 104 on the slide rail 11 can accurately control the movement of the heat storage unit 10.

[0062] When the heat dissipation module 4 fails, as the heat of the coolant is continuously transferred to the phase change material 102 in the heat storage unit 10, the phase change material 102 will gradually absorb heat. When the heat absorbed by the phase change material 102 in the current heat storage unit 10 is saturated, it is necessary to switch to the next heat storage unit 10 for emergency heat dissipation. At this time, by controlling the pulley 104 corresponding to the corresponding heat storage unit 10 to slide on the slide rail 11, the movement of the pulley 104 drives the heat storage unit 10 to move through the connecting rod 103, so that the heat transfer shell 101 on the heat storage unit 10 contacts the shell of the liquid storage module 2, thereby realizing the switching of the heat storage unit 10. This switching method can quickly and accurately replace the saturated heat storage unit 10 with the unsaturated heat storage unit 10, ensure the continuation of the emergency heat dissipation process, effectively utilize the heat storage capacity of multiple heat storage units 10, and extend the overall emergency heat dissipation time. Saturation means that the phase change material 102 in the corresponding heat storage unit 10 absorbs a certain amount of heat, and after reaching a certain temperature, it can no longer absorb heat.

[0063] In order to accurately obtain the temperature state of the phase change material 102 in each heat storage unit 10, and then switch the heat storage unit 10, in one embodiment, continue to refer to Figure 2 A temperature sensor 12 is provided on each of the heat storage units 10. When the temperature value detected by the temperature sensor 12 reaches a first threshold, the pulley 104 corresponding to the heat storage unit 10 is controlled to slide on the slide rail 11 to switch the current heat storage unit 10.

[0064] Among them, the main function of the temperature sensor 12 is to monitor the temperature change of the heat storage unit 10 in real time, specifically, to monitor the temperature change of the phase change material 102 in the heat storage unit 10. Since the temperature of the phase change material 102 changes during the process of absorbing heat, when the temperature reaches a certain level, it can be judged that the phase change material 102 is close to or has reached a saturation state. When the temperature sensor 12 detects that the temperature value of the heat storage unit 10 reaches the first threshold, it means that the phase change material 102 is close to or has reached a saturation state. The first threshold is pre-set according to the characteristics of the phase change material 102 and the actual heat dissipation requirements. At this time, the system will issue a control instruction according to the signal of the temperature sensor 12, and the control system corresponding to the pulley 104 will work according to the corresponding control instruction to control the pulley 104 corresponding to the corresponding heat storage unit 10 to slide on the slide rail 11, thereby realizing the switching of the heat storage unit 10. The automatic switching control method based on temperature monitoring improves the intelligence and automation of the system, and can respond to the state changes of the heat storage unit 10 in a timely and accurate manner, ensuring the efficient implementation of the emergency heat dissipation process, protecting the heating equipment from overheating damage to the greatest extent, and improving the reliability and stability of the entire liquid cooling device in the event of a fault.

[0065] In order to achieve multi-stage heat dissipation of the coolant and improve the heat dissipation effect, a multi-stage heat dissipation module 4 is also proposed. In one embodiment, Figure 3 As shown, the heat dissipation module 4 includes a first-stage heat dissipation unit 40, and the first-stage heat dissipation unit 40 includes a first solenoid valve 401, a radiator 402 and a first fan 403; the first solenoid valve 401 and the radiator 402 are sequentially arranged in the pipeline between the liquid storage module 2 and the heating device, and the first fan 403 is arranged on one side of the radiator 402; when the first solenoid valve 401 is turned on, the coolant flowing through the heating device is air-cooled and dissipated through the radiator 402 and the first fan 403.

[0066] Among them, when the first solenoid valve 401 is turned on, the coolant in the liquid storage module 2 flows to the heating device along the pipeline under the promotion of the power module 3, and after absorbing the heat generated by the heating device, it continues to flow to the first-stage heat dissipation unit 40 in the heat dissipation module 4. The heat of the heated coolant entering the radiator 402 is transferred to the surface of the radiator 402 through the heat conduction structure of the radiator 402. At the same time, the first fan 403 arranged on one side of the radiator 402 starts to work, causing the air to flow through the radiator 402 quickly. According to the principle of heat exchange, the air takes away heat from the surface of the radiator 402, so that the temperature of the coolant is reduced, thereby realizing air-cooled heat dissipation of the coolant. This air-cooled heat dissipation method is simple and effective, and can quickly reduce the temperature of the coolant so that it can circulate back to the heating device to absorb heat again, thereby ensuring the continuous operation of the entire heat dissipation system.

[0067] When the heat generating device generates a lot of heat, the first stage heat dissipation unit 40 can no longer quickly and effectively cool the coolant. In one embodiment, Figure 4 As shown, the heat dissipation module 4 also includes a second-stage heat dissipation unit 41, which includes a second solenoid valve 410, an evaporator 411, a compressor 412 and a condenser 413 arranged in sequence along the pipeline; the second solenoid valve 410 is arranged in the pipeline between the liquid storage module 2 and the heating device, and the pipeline between the second solenoid valve 410 and the heating device is arranged in the evaporator 411; refrigerant is arranged in the evaporator 411, and when the second solenoid valve 410 is turned on, the coolant flowing through the heating device exchanges heat with the refrigerant in the evaporator 411, and the refrigerant is evaporated into a gaseous state; the compressor 412 is used to compress the gaseous refrigerant into the condenser 413 for condensation, and the condensed gaseous refrigerant becomes liquid again, and the liquid refrigerant flows back to the evaporator 411.

[0068] Among them, the second solenoid valve 410 is similar to the first solenoid valve 401, and the second solenoid valve 410 is located in the pipeline between the liquid storage module 2 and the heating device. Part of the pipeline is also set in the evaporator 411, and its main function is still to control the flow path of the coolant, and it is a key control element for starting the second-stage heat dissipation unit 41. In one embodiment, the first solenoid valve 401 and the second solenoid valve 410 can also be replaced by a three-way solenoid valve. The three ports of the three-way solenoid valve are respectively connected to the pipeline passing through the radiator 402, the pipeline passing through the evaporator 411, and the pipeline flowing to the liquid storage module 2. By selecting the two ports of the three-way solenoid valve, the switching of the two-stage heat dissipation unit can be realized.

[0069] When the heat generating device generates serious heat and the first stage heat dissipation unit 40 cannot meet the heat dissipation demand, the second solenoid valve 410 is opened and the first solenoid valve 401 is closed. At this time, the coolant with a higher temperature flowing through the heat generating device enters the pipeline arranged in the evaporator 411. Since the coolant temperature is higher than the refrigerant temperature in the evaporator 411, according to the heat exchange principle, the heat of the coolant is transferred to the refrigerant, causing the refrigerant to evaporate from liquid to gas. In this process, the temperature of the coolant is reduced, and heat dissipation is achieved.

[0070] The refrigerant evaporated into gas in the evaporator 411 is sucked into the compressor 412, and the compressor 412 compresses the gaseous refrigerant. Through compression, the pressure and temperature of the gaseous refrigerant increase, and the compressed high-temperature and high-pressure gaseous refrigerant enters the condenser 413. In the condenser 413, the gaseous refrigerant exchanges heat with the surrounding environment (usually air) and releases heat. As the heat is released, the gaseous refrigerant gradually condenses into a liquid state. Figure 4A second fan 416 is also provided on one side of the condenser 413. The second fan has a similar function to the first fan 403, which causes air to flow quickly through the condenser 413. According to the heat exchange principle, the air takes away heat from the surface of the condenser 413, so that the temperature of the gaseous refrigerant liquid is reduced, thereby condensing the gaseous refrigerant back into liquid. Figure 4 A drying filter 414 and an expansion valve 415 are sequentially arranged on the pipeline between the condenser 413 and the evaporator 411, and the drying filter 414 and the expansion valve 415 are used to throttle and reduce the pressure of the condensed refrigerant and transport it back to the evaporator 411. Thus, a complete refrigeration cycle is formed, and the refrigerant is continuously circulated to continuously absorb heat from the coolant, so as to cool the coolant more effectively.

[0071] In order to determine when to start the first solenoid valve 401 to open the first stage heat dissipation unit 40, and when to start the second solenoid valve 410 to open the second stage heat dissipation unit 41, in one embodiment, Figure 4 As shown, the liquid cooling device also includes a controller 5, and a temperature detector 6 is also arranged on the pipeline between the liquid storage module 2 and the heating device, and the control ends of the temperature detector 6, the first solenoid valve 401 and the second solenoid valve 410 are all connected to the controller 5; the controller 5 is used to receive the detection data of the temperature detector 6, and control the conduction and closing of the first solenoid valve 401 and the second solenoid valve 410 according to the detection data.

[0072] The controller 5 continuously receives the detection data sent by the temperature detector 6, and compares the received temperature value with the preset temperature threshold value, and the corresponding temperature threshold value is set comprehensively according to factors such as the normal operating temperature range of the heating device, the performance of the heat dissipation module 4, and the characteristics of the coolant. If the controller 5 determines that the coolant temperature is at a relatively low level, for example, within the normal operating temperature range and the heating device is not heated, the heat dissipation demand can be met by relying solely on the first-stage heat dissipation unit 40 (air cooling). The controller 5 sends a conduction signal to the first solenoid valve 401 to open the first solenoid valve 401, and the coolant flows through the first-stage heat dissipation unit 40, and is air-cooled and dissipated through the radiator 402 and the first fan 403. At the same time, the controller 5 keeps the second solenoid valve 410 closed to avoid unnecessary startup of the second-stage heat dissipation unit 41 (refrigeration cycle heat dissipation) to save energy and reduce the burden on equipment operation.

[0073] When the temperature detector 6 detects that the temperature of the coolant has risen above a certain threshold, indicating that the heating device is seriously heating up and the first-stage heat dissipation unit 40 cannot effectively reduce the temperature of the coolant, the controller 5 will make corresponding decisions according to the preset strategy. At this time, the controller 5 will send a conduction signal to the second solenoid valve 410 to start the second-stage heat dissipation unit 41. At the same time, according to the actual situation, the controller 5 may also perform corresponding control on the first solenoid valve 401, such as adjusting its opening or closing it, to optimize the operation of the entire heat dissipation system. In this way, the controller 5 can accurately control the conduction and closing of the first solenoid valve 401 and the second solenoid valve 410 according to the real-time temperature of the coolant, realize the intelligent switching of the two-stage heat dissipation units, ensure that the heating device always works at a suitable temperature, and improve the reliability and heat dissipation efficiency of the liquid cooling device.

[0074] At the same time, the controller 5 is also used to control the switching of the heat storage unit 10. The specific switching process is described above and will not be repeated here.

[0075] In this embodiment, when the temperature of the heating device is too high, the phase change material 102 inside the heat storage unit 10 can absorb a certain amount of heat without significantly increasing the temperature, thereby slowing down the heating rate of the coolant, thereby having a good auxiliary effect on the cooling effect of the coolant, stabilizing the temperature of the coolant output by the liquid storage module 2, and ensuring the effective operation of the liquid-cooled heat dissipation device; at the same time, in this embodiment, when the heat dissipation module 4 fails and cannot work normally, and when it is detected that the temperature of the coolant output from the liquid storage module 2 is constantly rising, the corresponding mechanical device in the emergency heat storage module 1 is turned on, so that the multiple heat storage units 10 absorb the heat in the liquid storage module 2 in turn, thereby maintaining the stability of the temperature of the coolant output by the liquid storage module 2, achieving the effect of double heat dissipation protection, and ensuring good heat dissipation and normal operation of the heating device.

[0076] Embodiment 2:

[0077] In embodiment 1, a liquid cooling device is provided. In this embodiment, a liquid cooling method is proposed. As described in embodiment 1, the heat storage unit 10 can participate in normal heat dissipation or only be used for emergency heat dissipation. When the heat storage unit 10 does not participate in normal heat dissipation, in one embodiment, Figure 5 As shown, the method includes:

[0078] Step 101: the liquid storage module 2 stores the coolant, the power module 3 transports the coolant to the heat generating device for heat absorption, and the heat dissipation module 4 dissipates the heat from the coolant after heat absorption.

[0079] The step 101 specifically includes: starting the power module 3, dissipating the heat of the coolant after passing through the heat generating device through the first-stage heat dissipation unit 40, and returning the coolant after the heat dissipation to the liquid storage module 2 for circulation; when the temperature value obtained by the temperature detector 6 is less than the second threshold value, keeping the first-stage heat dissipation unit 40 working; when the temperature value obtained by the temperature detector 6 is greater than or equal to the second threshold value, dissipating the heat of the coolant after absorbing heat through the second-stage heat dissipation unit 41, and returning the coolant after the heat dissipation to the liquid storage module 2 for circulation.

[0080] Among them, when the first solenoid valve 401 is turned on, the coolant in the liquid storage module 2 flows to the heating device along the pipeline under the promotion of the power module 3, and after absorbing the heat generated by the heating device, it continues to flow to the first-stage heat dissipation unit 40 in the heat dissipation module 4. The heat of the heated coolant entering the radiator 402 is transferred to the surface of the radiator 402 through the heat conduction structure of the radiator 402. At the same time, the first fan 403 arranged on one side of the radiator 402 starts to work, causing the air to flow through the radiator 402 quickly. According to the principle of heat exchange, the air takes away heat from the surface of the radiator 402, so that the temperature of the coolant is reduced, thereby realizing air-cooled heat dissipation of the coolant. This air-cooled heat dissipation method is simple and effective, and can quickly reduce the temperature of the coolant so that it can circulate back to the heating device to absorb heat again, thereby ensuring the continuous operation of the entire heat dissipation system.

[0081] When the heat-generating device generates serious heat and the first-stage heat dissipation unit 40 can no longer quickly and effectively cool the coolant (i.e., the temperature value obtained by the temperature sensor 12 is greater than or equal to the second threshold), the second solenoid valve 410 is opened, and the coolant flowing through the heat-generating device exchanges heat with the refrigerant in the evaporator 411, evaporating the refrigerant into a gaseous state; the compressor 412 is used to compress the gaseous refrigerant into the condenser 413 for condensation, and the condensed gaseous refrigerant becomes liquid again, and the liquid refrigerant flows back into the evaporator 411. In this process, the temperature of the coolant is reduced, and heat dissipation is achieved.

[0082] Step 102: When the heat dissipation module 4 fails, the heat transfer shell 101 on each of the heat storage units 10 is alternately brought into contact with the shell of the liquid storage module 2, and the phase change material 102 therein is used to perform emergency heat dissipation on the coolant in the liquid storage module 2.

[0083] The step 102 specifically includes: when the heat dissipation module 4 fails and the temperature detector 6 detects that the temperature of the coolant in the circulation pipeline continues to rise, the heat transfer shell 101 on the current heat storage unit 10 is brought into contact with the shell of the liquid storage module 2, and the phase change material 102 in the current heat storage unit 10 absorbs the heat in the liquid storage module 2; the temperature of the current heat storage unit 10 is obtained by the temperature sensor 12, and when the obtained temperature value is greater than or equal to the first threshold value, the pulley 104 corresponding to the corresponding heat storage unit 10 is controlled to slide on the slide rail 11 to switch the current heat storage unit 10, so that the heat transfer shell 101 on the replaced heat storage unit 10 is brought into contact with the shell of the liquid storage module 2, and the phase change material 102 in the replaced heat storage unit 10 absorbs the heat in the liquid storage module 2.

[0084] When the heat dissipation module 4 fails, the system will start the emergency heat dissipation mode. First, the heat transfer shell 101 of the first heat storage unit 10 is brought into contact with the shell of the liquid storage module 2. At this time, the heat of the coolant in the liquid storage module 2 will be transferred to the phase change material 102 in the first heat storage unit 10, and the phase change material 102 begins to absorb heat and undergo phase change. As time goes by, the phase change material 102 of the first heat storage unit 10 may gradually reach a saturated state and can no longer absorb heat. At this time, the system will automatically switch to bring the heat transfer shell 101 of the second heat storage unit 10 into contact with the shell of the liquid storage module 2 to continue emergency heat dissipation. Similarly, the heat transfer shell 101 on each heat storage unit 10 is alternately brought into contact with the shell of the liquid storage module 2. Through the coordinated work of multiple heat storage units 10, the emergency heat dissipation time of the heating equipment is extended as much as possible, giving maintenance personnel enough time to repair the heat dissipation module 4 or take other emergency measures.

[0085] When the heat storage unit 10 participates in normal heat dissipation, in one embodiment, Figure 6 As shown, the method also includes:

[0086] Step 201: Keep the first fan 403 in a closed state, make the heat transfer shell 101 of the current heat storage unit 10 contact the shell of the liquid storage module 2, and open the first solenoid valve 401 to absorb the heat in the liquid storage module 2 through the phase change material 102 in the current heat storage unit 10.

[0087] Among them, in the initial state, the heat transfer shell 101 of the liquid storage module 2 can be in contact with the shell of the liquid storage module 2. In the loop composed of the liquid storage module 2, the power module 3 and the heating device, when the heating condition of the heating device is normal (specifically, it can be judged by temperature measurement), the heat storage unit 10 can be used to exchange heat with the liquid storage module 2 first, until the heating condition of the heating device cannot be controlled by the heat storage unit 10, and the temperature continues to rise. At this time, the corresponding heat dissipation module 4 is connected to the loop to cool the coolant after absorbing heat, so as to have a good auxiliary effect on the cooling effect of the coolant, stabilize the temperature of the coolant output by the liquid storage module 2, and ensure the effective operation of the liquid cooling device.

[0088] Step 202: The temperature of the current heat storage unit 10 is obtained through the temperature sensor 12 corresponding to the current heat storage unit 10. When the obtained temperature value is greater than or equal to the first threshold value, the pulley 104 corresponding to the next heat storage unit 10 is controlled to slide on the slide rail 11 to switch the current heat storage unit 10, so that the heat transfer shell 101 on the replaced next heat storage unit 10 contacts the shell of the liquid storage module 2, and the phase change material 102 in the replaced next heat storage unit 10 absorbs the heat in the liquid storage module 2.

[0089] It is worth noting that whether the step 202 is executed can be confirmed according to the actual situation. Generally speaking, when the first heat storage unit 10 here cannot meet the heat dissipation requirements, if the temperature rise of the coolant is still not obvious, the heat dissipation can still be met by switching to the next heat storage unit 10, and the conditions can be met without using the heat dissipation module 4, thereby reducing the energy consumption of the device.

[0090] Step 203: When the temperature value obtained by the temperature detector 6 is greater than or equal to the third threshold and less than the second threshold, the first fan 403 is turned on, and the coolant after absorbing heat is dissipated through the radiator 402. The coolant after heat dissipation returns to the liquid storage module 2 for circulation.

[0091] The second threshold is greater than the third threshold. The range of the second threshold may be 30±2°C, and the range of the third threshold may be 25±2°C. When the heat storage unit 10 can no longer meet the heat dissipation condition, the first-stage heat dissipation unit 40 is turned on. The heat dissipation method and switching method of the first-stage heat dissipation unit 40 refer to the above description and will not be repeated here.

[0092] Step 204: When the temperature value obtained by the temperature detector 6 is greater than or equal to the second threshold value, the first solenoid valve 401 is closed and the second solenoid valve 410 is opened to dissipate the heat of the coolant after absorbing heat through the second-stage heat dissipation unit 41. The coolant after heat dissipation returns to the liquid storage module 2 for circulation.

[0093] Among them, the heat dissipation method and switching mode of the second-stage heat dissipation unit 41 are described above and will not be repeated here.

[0094] When the heating device is heating normally, the phase change material 102 inside the heat storage unit 10 can absorb a certain amount of heat without significantly increasing the temperature, slowing down the heating rate of the coolant, thereby having a good auxiliary effect on the cooling effect of the coolant, stabilizing the temperature of the coolant output by the liquid storage module 2, ensuring the effective operation of the device, and saving energy consumption.

[0095] For the specific structure of the liquid cooling device, please refer to Example 1 and will not be repeated in this embodiment.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid cooling device, characterized in that: The invention comprises an emergency heat storage module (1), and a liquid storage module (2), a power module (3) and a heat dissipation module (4) connected in sequence along a pipeline; the emergency heat storage module (1) comprises a plurality of heat storage units (10), the heat storage units (10) comprise a heat transfer shell (101) and a phase change material (102) arranged in the heat transfer shell (101); the heat transfer shell (101) is used to contact the shell of the liquid storage module (2); The liquid storage module (2) is used to store the coolant, the power module (3) is used to transport the coolant to the heat generating device for heat absorption, and the heat dissipation module (4) is used to dissipate the heat of the coolant after heat absorption; When the heat dissipation module (4) fails, the heat transfer shells (101) on the heat storage units (10) are alternately brought into contact with the shells of the liquid storage modules (2), and emergency heat dissipation of the coolant in the liquid storage modules (2) is performed through the phase change material (102) therein.

2. The liquid cooling device according to claim 1, characterized in that: The emergency heat storage module (1) further comprises a slide rail (11), a plurality of connecting rods (103) and a plurality of pulleys (104); the connecting rod (103) is connected to the pulley (104), and the pulley (104) is slidably arranged on the slide rail (11); each of the heat storage units (10) is connected to a corresponding connecting rod (103); When the heat absorbed by the phase change material (102) in the current heat storage unit (10) is saturated, the pulley (104) corresponding to the corresponding heat storage unit (10) is controlled to slide on the slide rail (11), so that the heat transfer shell (101) on the corresponding heat storage unit (10) contacts the shell of the liquid storage module (2).

3. The liquid cooling device according to claim 2, characterized in that: A temperature sensor (12) is provided on each of the heat storage units (10); when the temperature value detected by the temperature sensor (12) reaches a first threshold value, the pulley (104) corresponding to the current heat storage unit (10) is controlled to slide on the slide rail (11) to switch the current heat storage unit (10).

4. The liquid cooling device according to claim 1, characterized in that: The heat dissipation module (4) comprises a first-stage heat dissipation unit (40), wherein the first-stage heat dissipation unit (40) comprises a first solenoid valve (401), a radiator (402) and a first fan (403); The first solenoid valve (401) and the radiator (402) are sequentially arranged in a pipeline between the liquid storage module (2) and the heating device, and the first fan (403) is arranged on one side of the radiator (402); When the first solenoid valve (401) is turned on, the coolant flowing through the heat generating device is cooled by air through the radiator (402) and the first fan (403).

5. The liquid cooling device according to claim 4, characterized in that: The heat dissipation module (4) further comprises a second-stage heat dissipation unit (41), wherein the second-stage heat dissipation unit (41) comprises a second solenoid valve (410), an evaporator (411), a compressor (412), and a condenser (413) sequentially arranged along the pipeline; The second solenoid valve (410) is arranged in a pipeline between the liquid storage module (2) and the heating device, and the pipeline between the second solenoid valve (410) and the heating device is arranged in the evaporator (411); The evaporator (411) is provided with a refrigerant. When the second solenoid valve (410) is turned on, the cooling liquid flowing through the heat generating device exchanges heat with the refrigerant in the evaporator (411), and the refrigerant is evaporated into a gaseous state. The compressor (412) is used to compress the gaseous refrigerant into the condenser (413) for condensation. The condensed gaseous refrigerant becomes liquid again, and the liquid refrigerant flows back into the evaporator (411).

6. The liquid cooling device according to claim 5, characterized in that: The liquid cooling device further comprises a controller (5), and a temperature detector (6) is further provided on the pipeline between the liquid storage module (2) and the heating device, and the control ends of the temperature detector (6), the first solenoid valve (401) and the second solenoid valve (410) are all connected to the controller (5); The controller (5) is used to receive detection data from the temperature detector (6), and control the opening and closing of the first solenoid valve (401) and the second solenoid valve (410) according to the detection data.

7. A liquid cooling method, characterized in that: The method is applicable to the liquid cooling device according to any one of claims 1 to 6, comprising: The liquid storage module (2) stores the coolant, the power module (3) transports the coolant to the heat generating device for heat absorption, and the heat dissipation module (4) dissipates heat from the coolant after heat absorption; When the heat dissipation module (4) fails, the heat transfer shells (101) on the heat storage units (10) are alternately brought into contact with the shells of the liquid storage modules (2), and emergency heat dissipation of the coolant in the liquid storage modules (2) is performed through the phase change material (102) therein.

8. The liquid cooling method according to claim 7, characterized in that: When the heat dissipation module (4) fails, the heat transfer housing (101) on each of the heat storage units (10) is alternately brought into contact with the housing of the liquid storage module (2), and emergency heat dissipation of the coolant in the liquid storage module (2) is performed through the phase change material (102) therein, comprising: When the heat dissipation module (4) fails and the temperature detector (6) detects that the temperature of the coolant in the circulation pipeline continues to rise, the heat transfer shell (101) on the current heat storage unit (10) is brought into contact with the shell of the liquid storage module (2), and the heat in the liquid storage module (2) is absorbed by the phase change material (102) in the current heat storage unit (10); The temperature of the current heat storage unit (10) is obtained through a temperature sensor (12); when the obtained temperature value is greater than or equal to a first threshold value, the pulley (104) corresponding to the corresponding heat storage unit (10) is controlled to slide on a slide rail (11) to switch the current heat storage unit (10), so that the heat transfer shell (101) on the replaced heat storage unit (10) contacts the shell of the liquid storage module (2), and the phase change material (102) in the replaced heat storage unit (10) absorbs the heat in the liquid storage module (2).

9. The liquid cooling method according to claim 7, characterized in that: The heat dissipation module (4) comprises a first-stage heat dissipation unit (40) and a second-stage heat dissipation unit (41); a temperature detector (6) is also provided on the pipeline between the liquid storage module (2) and the heating device; The power module (3) transports the coolant to the heat generating device for heat absorption, and the heat dissipation module (4) dissipates heat from the coolant after heat absorption, specifically comprising: The power module (3) is started, and the cooling liquid flowing through the heat generating device is cooled by the first-stage cooling unit (40), and the cooling liquid after cooling returns to the liquid storage module (2) for circulation; When the temperature value acquired by the temperature detector (6) is less than a second threshold value, the first-stage heat dissipation unit (40) is kept in operation; When the temperature value acquired by the temperature detector (6) is greater than or equal to a second threshold value, the cooling liquid after absorbing heat is cooled by the second-stage cooling unit (41), and the cooling liquid after cooling returns to the liquid storage module (2) for circulation.

10. The liquid cooling method according to claim 9, characterized in that: The first-stage heat dissipation unit (40) comprises a first solenoid valve (401), a radiator (402) and a first fan (403); the second-stage heat dissipation unit (41) comprises a second solenoid valve (410); the method further comprises: Keeping the first fan (403) in a closed state, bringing the heat transfer housing (101) of the current heat storage unit (10) into contact with the housing of the liquid storage module (2), and opening the first solenoid valve (401) to absorb heat in the liquid storage module (2) through the phase change material (102) in the current heat storage unit (10); The temperature of the current heat storage unit (10) is obtained by a temperature sensor (12) corresponding to the current heat storage unit (10); when the obtained temperature value is greater than or equal to a first threshold value, the pulley (104) corresponding to the next heat storage unit (10) is controlled to slide on the slide rail (11) to switch the current heat storage unit (10), so that the heat transfer shell (101) on the next heat storage unit (10) after replacement contacts the shell of the liquid storage module (2), and the phase change material (102) in the next heat storage unit (10) after replacement absorbs the heat in the liquid storage module (2); When the temperature value acquired by the temperature detector (6) is greater than or equal to the third threshold value and less than the second threshold value, the first fan (403) is turned on, and the cooling liquid after absorbing heat is dissipated through the radiator (402), and the cooling liquid after dissipation returns to the liquid storage module (2) for circulation; When the temperature value acquired by the temperature detector (6) is greater than or equal to a second threshold value, the first solenoid valve (401) is closed and the second solenoid valve (410) is opened so as to dissipate the heat of the cooling liquid after absorbing the heat through the second-stage heat dissipation unit (41), and the cooling liquid after the heat dissipation returns to the liquid storage module (2) for circulation.

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