Heat dissipation system, electronic device, control method of heat dissipation system, and program product

Abstract

The invention discloses a heat dissipation system, electronic equipment, a control method of the heat dissipation system and a program product, and relates to the technical field of computer heat dissipation, the heat dissipation system comprises a cold plate, a negative pressure assembly, a condenser, a data acquisition module and a control module, the inlet end of the negative pressure assembly communicates with the outlet end of the cold plate, and the negative pressure assembly is used for forming a negative pressure environment; the condenser is used for exchanging heat with the outside, the outlet end of the condenser communicates with the inlet end of the cold plate, the air inlet end of the condenser communicates with the air outlet end of the negative pressure assembly, and the liquid inlet end of the condenser communicates with the liquid outlet end of the negative pressure assembly; the control module is at least used for outputting a control signal for adjusting the negative pressure assembly according to the heating element data information collected by the data collection module. The technical problem of poor heat dissipation effect at present is solved, the boiling point of the phase change working medium and the pressure of the whole heat dissipation system are reduced, the temperature of the heating element is dynamically adjusted, and the heat dissipation efficiency and reliability are improved.

Description

Technical Field

[0001] This application belongs to the technical field of computer heat dissipation, and particularly relates to a heat dissipation system, an electronic device, a control method for the heat dissipation system, and a program product. Background Art

[0002] With the booming development of cloud computing and big data, the power that servers need to support is getting larger and larger, and the heat flux density of key heat-generating devices such as chips in servers is also increasing rapidly. However, due to the limitations of their structures and working principles, the current heat dissipation methods have led to the heat dissipation efficiency approaching the upper limit, making it difficult to further improve and unable to meet the growing heat dissipation requirements of heat-generating devices. Summary of the Invention

[0003] This application provides a heat dissipation system, an electronic device, a control method for the heat dissipation system, and a program product to at least solve the problem that the heat dissipation method in the related art cannot meet the growing heat dissipation requirements of heat-generating devices.

[0004] This application provides a heat dissipation system, including: A cooling circuit, the cooling circuit includes a cold plate, a negative pressure component, and a condenser connected in sequence. The cold plate is used for heat exchange with a heat-generating element. The inlet end of the negative pressure component is communicated with the outlet end of the cold plate. The negative pressure component is used to form a negative pressure environment. The condenser is used for heat exchange with the outside. The outlet end of the condenser is communicated with the inlet end of the cold plate. The intake end of the condenser is communicated with the outlet end of the negative pressure component. The liquid inlet end of the condenser is communicated with the liquid outlet end of the negative pressure component; A data acquisition module, at least used for acquiring data information of the heat-generating element; A control module, at least used for outputting a control signal for adjusting the negative pressure component according to the data information.

[0005] This application also provides an electronic device, including: A heat-generating element; and The heat dissipation system as described above, and the heat dissipation system is used for dissipating heat from the heat-generating element.

[0006] This application also provides a control method for a heat dissipation system, which is applied to the heat dissipation system as described above. The control method includes: Obtaining data information of the heat-generating element through the data acquisition module; Outputting a control signal for adjusting the negative pressure component according to the data information.

[0007] This application also provides a computer program product, including: An obtaining unit, used for obtaining data information of the heat-generating element; An output unit for outputting a control signal for adjusting the negative pressure component according to the data information.

[0008] The present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the above control methods of the heat dissipation system are implemented.

[0009] Through the present application, since the negative pressure component provides a negative pressure environment, on the one hand, the boiling point of the phase change working fluid can be reduced, enabling the phase change working fluid to undergo a phase change at a lower temperature, improving the heat dissipation efficiency and the flexibility of use, and accelerating the circulating flow of the phase change working fluid; on the other hand, the pressure of the entire heat dissipation system can also be reduced, improving the reliability of the heat dissipation system. At the same time, the control module outputs a corresponding control signal to adjust the negative pressure component according to the received data information of the heating element, and ensures the heat dissipation effect by adjusting the negative pressure component in real time, realizing the dynamic adjustment of the temperature of the heating element, and improving the reliability of the heat dissipation system. Therefore, the technical problem of poor current heat dissipation effect can be solved, and the technical effects of improving the heat dissipation efficiency and reliability can be achieved. Description of the Drawings

[0010] To more clearly illustrate the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 A schematic structural diagram of a heat dissipation system provided by an embodiment of the present application; Figure 2 A schematic flow diagram of a control method of a heat dissipation system provided by an embodiment of the present application; Figure 3 A schematic flow diagram of a control method of a heat dissipation system provided by an embodiment of the present application; Figure 4 A phase diagram of water provided by an embodiment of the present application; Figure 5 A computer program product provided by an embodiment of the present application.

[0012] Among them, the above-mentioned drawings include the following reference numerals: 100, cooling circuit; 110, cold plate; 121, negative pressure chamber; 122, air extraction device; 123, circulation pump; 124, gas-liquid separator; 130, condenser; 141, liquid collection chamber; 150, exhaust valve; 211. Liquid replenishment chamber; 220. Liquid replenishment pump; 610. Acquisition unit; 620. Output unit. Detailed implementation manners

[0013] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0014] It should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. The terms "installation", "connection", and "coupling" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. The terms "parallel", "perpendicular", and "equal" include the described situations and situations similar to the described situations, and the range of the similar situations is within the acceptable deviation range, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurement being discussed and the error associated with the measurement of a specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, and the acceptable deviation range of approximate parallel can be, for example, within 5° deviation; "perpendicular" includes absolute perpendicular and approximate perpendicular, and the acceptable deviation range of approximate perpendicular can also be, for example, within 5° deviation. "Equal" includes absolute equality and approximate equality, and the acceptable deviation range of approximate equality can be, for example, that the difference between the two equal ones is less than or equal to 5% of either one of them. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in specific situations.

[0015] In order to enable those skilled in the art of this technology to better understand the solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0016] Embodiments of the present application provide a heat dissipation system. In combination with the structure and working principle of the heat dissipation system, the device is described in detail (technical terms involved must be explained).

[0017] In some embodiments, such as Figure 1 shown, the heat dissipation system includes a cooling circuit 100, a data acquisition module, and a control module.

[0018] The cooling circuit 100 includes a cold plate 110, a negative pressure component, and a condenser 130 connected in sequence. The cold plate 110 is used for heat exchange with a heat generating element. The inlet end of the negative pressure component is communicated with the outlet end of the cold plate 110. The negative pressure component is used to form a negative pressure environment. The condenser 130 is used for heat exchange with the outside. The outlet end of the condenser 130 is communicated with the inlet end of the cold plate 110. The intake end of the condenser 130 is communicated with the outlet end of the negative pressure component. The liquid inlet end of the condenser 130 is communicated with the liquid outlet end of the negative pressure component.

[0019] Exemplarily, the type of the cold plate 110 includes but is not limited to a microchannel liquid cooling plate 110. The cold plate 110 is made of materials with high thermal conductivity including but not limited to copper.

[0020] It should be noted that the heat generating element includes but is not limited to electronic devices such as chips. The cold plate 110 is a two-phase cold plate 110 filled with a liquid phase change working medium. The liquid phase change working medium exchanges heat with the heat generating element and vaporizes, absorbing heat during the vaporization process to achieve efficient heat dissipation of the heat generating element.

[0021] Exemplarily, the cold plate 110 is in contact and cooperation with the heat generating element to improve the heat dissipation effect on the heat generating element.

[0022] It can be understood that the cold plate 110 absorbs the heat generated by the heat generating element, causing at least part of the phase change working medium to be heated and undergo a phase change (i.e., from liquid to gas) in the cold plate 110. Under the action of negative pressure, the gaseous phase change working medium enters the condenser 130 after passing through the outlet end of the negative pressure component and the intake end of the condenser 130 in sequence. The liquid phase change working medium enters the condenser 130 after passing through the liquid outlet end of the negative pressure component and the liquid inlet end of the condenser 130 in sequence. The gaseous phase change working medium exchanges heat with the external cooling medium (such as air), releases latent heat and re-converts to liquid. The cooled phase change working medium flows back to the cold plate 110 through the outlet end of the condenser 130 to complete a cooling cycle.

[0023] At the same time, the negative pressure component provides a negative pressure environment. On the one hand, it can reduce the boiling point of the phase change working medium, enable the phase change working medium to undergo a phase change at a lower temperature, improve the heat dissipation efficiency and the flexibility of use, and accelerate the circulation flow of the phase change working medium; on the other hand, it can also reduce the pressure of the entire heat dissipation system and improve the reliability of the heat dissipation system.

[0024] Exemplarily, the phase change working fluid includes, but is not limited to, water, which reduces the manufacturing cost and maintenance cost.

[0025] It should be noted that, as Figure 1 shown, the direction indicated by the arrow represents the flow direction of the phase change working fluid.

[0026] The data acquisition module is at least used to acquire the data information of the heating element; the control module is at least used to output a control signal for adjusting the negative pressure component according to the data information.

[0027] It can be understood that the data acquisition module acquires the data information of the heating element (such as the temperature, power consumption or working state of the heating element, etc.), understands the current heating situation of the heating element, and provides a basis for subsequent heat dissipation control. The control module is electrically connected to the data acquisition module. The control module outputs a corresponding control signal to adjust the negative pressure component according to the received data information of the heating element, and ensures the heat dissipation effect by adjusting the negative pressure component in real time, realizes the dynamic adjustment of the temperature of the heating element, and can improve the reliability of the heat dissipation system.

[0028] The heat dissipation system provided in this embodiment reduces the boiling point of the phase change working fluid and the pressure of the entire heat dissipation system by introducing a negative pressure component, and realizes the dynamic adjustment of the temperature of the heating element through the data acquisition module and the control module, improving the heat dissipation efficiency and reliability.

[0029] In some embodiments, as Figure 1 shown, the negative pressure component includes a housing, an air extraction device 122 and a circulation pump 123. The housing forms a negative pressure chamber 121, and the negative pressure chamber 121 is used to accommodate the phase change working fluid in a gas-liquid two-phase state. The inlet end of the negative pressure chamber 121 is communicated with the outlet end of the cold plate 110; the air extraction device 122 is used to generate negative pressure in the negative pressure chamber 121. The intake end of the air extraction device 122 is communicated with the outlet end of the negative pressure chamber 121, and the outlet end of the air extraction device 122 is communicated with the intake end of the condenser 130; the circulation pump 123 is respectively connected to the liquid outlet end of the negative pressure chamber 121 and the liquid inlet end of the condenser 130, and is used to drive the liquid phase change working fluid to flow from the negative pressure chamber 121 into the condenser 130.

[0030] Exemplarily, the air extraction device 122 includes, but is not limited to, a vacuum pump.

[0031] It should be noted that the size and shape of the negative pressure chamber 121 can be designed according to actual needs, and this embodiment does not make specific limitations on this.

[0032] It can be understood that the gas is evacuated from the negative pressure chamber 121 by the air extraction device 122, reducing the pressure in the negative pressure chamber 121, providing a negative pressure environment for the cooling circuit 100 and promoting the circulating flow of the phase change working fluid. The heat generated by the heating element is absorbed by the phase change working fluid in the cold plate 110. At least part of the liquid phase change working fluid undergoes a phase change (from liquid to gas) when heated, absorbing a large amount of latent heat. The gaseous phase change working fluid and the possible part of the phase change working fluid that remains in the liquid state and has not vaporized enter the negative pressure chamber 121. Subsequently, using the density difference between gas and liquid, the gaseous phase change working fluid is extracted by the air extraction device 122 and enters the condenser 130, and the liquid phase change working fluid is driven by the circulation pump 123 to enter the condenser 130. In addition, by using the circulation pump 123 to directly introduce the liquid phase change working fluid into the condenser 130, the possibility of it entering the air extraction device 122 can also be reduced, improving the working reliability of the air extraction device 122.

[0033] In some embodiments, the data information of the heating element includes the actual temperature of the heating element, and the control signal includes the air extraction rate of the air extraction device 122.

[0034] It can be understood that the control module dynamically adjusts the air extraction rate of the air extraction device 122 according to the actual temperature of the heating element, enabling dynamic optimization control. This control strategy not only improves the heat dissipation efficiency, but also achieves energy conservation and environmental protection, and at the same time extends the service life of the heat dissipation system.

[0035] Exemplarily, when the actual temperature of the heating element is relatively high, the control module outputs a control signal to increase the air extraction rate of the air extraction device 122, thereby reducing the pressure in the negative pressure chamber 121, further lowering the boiling point of the phase change working fluid, accelerating its vaporization speed, and improving the heat dissipation efficiency. Conversely, when the actual temperature of the heating element is relatively low, the control module issues a control signal to decrease the air extraction rate of the air extraction device 122, thereby increasing the pressure in the negative pressure chamber 121, further raising the boiling point of the phase change working fluid, and reducing its vaporization speed to save energy.

[0036] In some embodiments, the data acquisition module includes a temperature sensor, and at least one of the cold plate 110 and the heating element is provided with a temperature sensor to obtain the actual temperature of the heating element indirectly or directly.

[0037] In some embodiments, a pressure sensor is provided in the negative pressure chamber 121. By monitoring the pressure change in the negative pressure chamber 121 and combining the known volume and time in the negative pressure chamber 121, the air extraction rate of the air extraction device 122 is determined. Of course, in other embodiments, a flow sensor can also be used to determine the air extraction rate of the air extraction device 122, and this embodiment does not make specific limitations in this regard.

[0038] In some embodiments, the data acquisition module is further configured to acquire the liquid level information of the negative pressure chamber 121, and the control module is configured to output a control signal for starting and stopping the circulation pump 123 according to the liquid level information of the negative pressure chamber 121.

[0039] It can be understood that the liquid level information of the negative pressure chamber 121 reflects the stock of the liquid phase change working medium in the negative pressure chamber 121. That is, too high a liquid level may cause the liquid working medium to overflow from the gas outlet end of the negative pressure chamber 121 and enter the air extraction device 122, affecting the normal operation of the air extraction device 122; too low a liquid level may result in insufficient liquid phase change working medium, affecting the heat dissipation effect. The control module controls the start and stop of the circulation pump 123 according to the liquid level height in the negative pressure chamber 121 obtained by the data acquisition module in real time, ensuring that the liquid phase change working medium in the negative pressure chamber 121 can maintain an appropriate liquid level, realizing dynamic adjustment of the circulation flow rate of the liquid phase change working medium, reducing unnecessary energy consumption, and at the same time ensuring the stability of the heat dissipation effect.

[0040] Exemplarily, when the liquid level information of the negative pressure chamber 121 is lower than the first threshold (i.e., the liquid phase change working medium in the negative pressure chamber 121 is at a low liquid level), the control module issues a control signal to pause the circulation pump 123, causing the liquid phase change working medium to accumulate in the negative pressure chamber 121; when the liquid level information of the negative pressure chamber 121 is higher than the second threshold (i.e., the liquid phase change working medium in the negative pressure chamber 121 is at a high liquid level), the control module issues a control signal to start the circulation pump 123, causing the liquid phase change working medium in the negative pressure chamber 121 to flow into the condenser 130 and enter the cooling cycle.

[0041] In some embodiments, the data acquisition module includes a first liquid level sensor, which is disposed in the negative pressure chamber 121 and is configured to monitor the liquid level in the negative pressure chamber 121 in real time. Exemplarily, the first liquid level sensor includes, but is not limited to, a static pressure type liquid level sensor, an ultrasonic type liquid level sensor, or a capacitive type liquid level sensor.

[0042] It can be understood that the first liquid level sensor is installed in the negative pressure chamber 121, and can detect the liquid level height of the liquid phase change working medium in real time and convert it into an electrical signal containing liquid level information and then transmit it to the control module, so that the control module can determine whether to start or pause the circulation pump 123.

[0043] In some embodiments, as Figure 1 shown, the negative pressure assembly further includes a gas-liquid separator 124. The gas inlet end of the gas-liquid separator 124 is communicated with the gas outlet end of the negative pressure chamber 121, the gas outlet end of the gas-liquid separator 124 is communicated with the gas inlet end of the air extraction device 122, and the liquid outlet end of the gas-liquid separator 124 communicates with the circulation pump 123. Exemplarily, the gas-liquid separator 124 includes, but is not limited to, a gravity type gas-liquid separator 124, a cyclone type gas-liquid separator 124, a filter type gas-liquid separator 124, or a floating type gas-liquid separator 124.

[0044] It can be understood that using the gas-liquid separator 124 to separate the phase-change working fluid flowing out from the air outlet end of the negative pressure chamber 121 again can not only make it possible that only the gaseous phase-change working fluid enters the air extraction device 122 as much as possible, reducing the possibility of the air extraction efficiency decreasing or the air extraction device 122 being damaged due to the liquid phase-change working fluid entering the air extraction device 122, but also ensure the stability of the respective flow rates of the gaseous and liquid phase-change working fluids in the heat dissipation system by further separating gas and liquid, optimizing the heat dissipation effect.

[0045] In some embodiments, the data acquisition module is further configured to acquire the liquid level information of the gas-liquid separator 124, and the control module is configured to output a control signal for driving the circulation pump 123 to start and stop according to the liquid level information of the gas-liquid separator 124.

[0046] It can be understood that the liquid level information of the gas-liquid separator 124 reflects the stock of the liquid phase-change working fluid in the gas-liquid separator 124, that is, too high a liquid level may cause the liquid working fluid to overflow to the air outlet end of the gas-liquid separator 124 and enter the air extraction device 122, affecting the normal operation of the air extraction device 122; too low a liquid level may cause insufficient liquid phase-change working fluid, affecting the heat dissipation effect. The control module obtains the liquid level height in the gas-liquid separator 124 in real time according to the data acquisition module, ensures that the liquid phase-change working fluid can maintain an appropriate liquid level in the gas-liquid separator 124, realizes dynamic adjustment of the circulation flow rate of the liquid phase-change working fluid, reduces unnecessary energy consumption, and at the same time ensures the stability of the heat dissipation effect.

[0047] Exemplarily, when the liquid level information of the gas-liquid separator 124 is lower than the third threshold (that is, the liquid phase-change working fluid in the gas-liquid separator 124 is at a low liquid level), the control module issues a control signal to pause the circulation pump 123, so that the liquid phase-change working fluid accumulates in the negative pressure chamber 121; when the liquid level information of the gas-liquid separator 124 is higher than the fourth threshold (that is, the liquid phase-change working fluid in the gas-liquid separator 124 is at a high liquid level), the control module issues a control signal to start the circulation pump 123, so that the liquid phase-change working fluid in the gas-liquid separator 124 flows into the condenser 130 and enters the cooling cycle.

[0048] In some embodiments, the data acquisition module includes a second liquid level sensor, and the second liquid level sensor is arranged on the gas-liquid separator 124 and is used for monitoring the liquid level in the gas-liquid separator 124 in real time. Exemplarily, the second liquid level sensor includes but is not limited to a hydrostatic liquid level sensor, an ultrasonic liquid level sensor or a capacitive liquid level sensor.

[0049] It can be understood that the second liquid level sensor is installed in the gas-liquid separator 124, can detect the liquid level height of the liquid phase-change working fluid in real time and convert it into an electrical signal containing the liquid level information and then transmit it to the control module, so that the control module can judge whether it is necessary to start or pause the circulation pump 123.

[0050] It should be noted that in some embodiments, when the data acquisition module simultaneously acquires the liquid level information of the negative pressure chamber 121 and the gas-liquid separator 124, the circulation pump 123 is controlled to start when at least one of the liquid levels in the negative pressure chamber 121 and the gas-liquid separator 124 is high, and the circulation pump 123 is controlled to start when at least one of the liquid levels in the negative pressure chamber 121 and the gas-liquid separator 124 is low. Of course, in other embodiments, the liquid level information of the negative pressure chamber 121 may also be the main one, and this embodiment does not make specific restrictions on this.

[0051] In some embodiments, as Figure 1 shown, the cooling circuit 100 further includes a liquid collecting member, the liquid collecting member forms a liquid collecting chamber 141, the liquid inlet end of the liquid collecting chamber 141 is communicated with the outlet end of the condenser 130, and the liquid outlet end of the liquid collecting chamber 141 is communicated with the inlet end of the cold plate 110. It should be noted that the shape and size of the liquid collecting chamber 141 can be designed according to actual needs, and this embodiment does not make specific restrictions on this.

[0052] It can be understood that the liquid collecting chamber 141 collects the liquid phase change working medium flowing out of the condenser 130, so as to reduce the accumulation of the liquid phase change working medium in the pipeline, reduce the possibility of the cooling system running unstably caused by liquid level fluctuations, enable the phase change working medium to flow into the cold plate 110 more evenly, improve the heat dissipation effect, reduce energy consumption, and improve the reliability of the cooling system.

[0053] In some embodiments, as Figure 1 shown, the cooling system further includes a liquid replenishing member and a liquid replenishing pump 220. The liquid replenishing member forms a liquid replenishing chamber 211 for storing the phase change working medium. The liquid inlet end of the liquid replenishing chamber 211 is communicated with the inlet end of the cold plate 110; the liquid replenishing pump 220 is respectively connected to the liquid inlet end of the liquid collecting chamber 141 and the liquid outlet end of the liquid replenishing chamber 211, and is used to drive the liquid phase change working medium to flow from the liquid replenishing chamber 211 into the liquid collecting chamber 141. It should be noted that the shape and size of the liquid replenishing chamber 211 can be designed according to actual needs, and this embodiment does not make specific restrictions on this.

[0054] It can be understood that the liquid replenishing chamber 211 is used to store the liquid phase change working medium, ensuring that when the phase change working medium decreases due to evaporation or leakage, etc., starting the liquid replenishing pump 220 can timely supplement the phase change working medium in the cooling circuit 100, improving the reliability and heat dissipation effect of the cooling system.

[0055] In some embodiments, the data acquisition module is further used to acquire the liquid level information of the liquid collecting chamber 141, and the control module is further used to output a control signal for driving the liquid replenishing pump 220 to start and stop according to the liquid level information of the liquid collecting chamber 141.

[0056] It can be understood that the liquid level information of the liquid collection chamber 141 reflects the stock of the liquid phase change working medium in the liquid collection chamber 141. That is, too high a liquid level indicates that there is more phase change working medium in the cooling circuit 100, and it is necessary to control the replenishment pump 220 to pause to reduce the risk of liquid working medium overflow or too high pressure in the heat dissipation system; too low a liquid level may result in insufficient liquid phase change working medium, and it is necessary to control the replenishment pump 220 to start to maintain the heat dissipation function of the heat dissipation system.

[0057] Exemplarily, when the liquid level information of the liquid collection chamber 141 is lower than the fifth threshold (i.e., the phase change working medium in the liquid collection chamber 141 is at a low liquid level), the control module issues a control signal to start the replenishment pump 220 to replenish the phase change working medium in the liquid collection chamber 141 by using the replenishment chamber 211; when the liquid level information of the liquid collection chamber 141 is higher than the sixth threshold (i.e., the phase change working medium in the liquid collection chamber 141 is at a high liquid level), the control module issues a control signal to pause the replenishment pump 220.

[0058] In some embodiments, the data acquisition module includes a third liquid level sensor, and the third liquid level sensor is disposed in the liquid collection chamber 141 for real-time monitoring of the liquid level in the liquid collection chamber 141. Exemplarily, the third liquid level sensor includes, but is not limited to, a hydrostatic liquid level sensor, an ultrasonic liquid level sensor, or a capacitive liquid level sensor.

[0059] It can be understood that the third liquid level sensor is installed in the liquid collection chamber 141, can detect the liquid level height of the phase change working medium in real time, convert it into an electrical signal containing liquid level information, and then transmit it to the control module so that the control module can determine whether it is necessary to start or pause the replenishment pump 220.

[0060] In some embodiments, as Figure 1 shown, the cooling circuit 100 further includes an exhaust valve 150, and the exhaust valve 150 is disposed between the outlet end of the condenser 130 and the inlet end of the cold plate 110 for exhausting air to the outside.

[0061] It can be understood that by actively exhausting air or other non-condensable gases in the cooling circuit 100 through the exhaust valve 150, the heat dissipation effect and the circulation efficiency of the phase change working medium are optimized. In addition, the exhaust valve 150 can also help balance the pressure stability of the cooling circuit 100, reduce the occurrence of gas blockage phenomena, and improve the performance and reliability of the heat dissipation system.

[0062] The embodiment of the present application further provides an electronic device, including a heating element and the above heat dissipation system.

[0063] It should be noted that the electronic device is a device with heating elements such as a server, a computer, or a switch. The electronic device may further include structures such as a chassis, a rack, a motherboard, a CPU, a memory module, etc. The specific structure can be set in a conventional manner and will not be elaborated in detail here. It can be understood that by setting up a heat dissipation system, the heating elements in the electronic device can be cooled, reducing the possibility that the heating elements in the electronic device stop operating due to excessive temperature and ensuring the normal operation of the electronic device.

[0064] An embodiment of the present application further provides a control method for a heat dissipation system, which is applied to the heat dissipation system as described above. As Figure 2 shown, the control method of the heat dissipation system includes step 510 and step 520.

[0065] Step 510: Obtain data information of the heating element through the data acquisition module.

[0066] It can be understood that the data acquisition module includes but is not limited to a temperature sensor, a pressure sensor, etc., and the data information of the heating element includes but is not limited to the actual temperature of the corresponding heating element and the pressure of the cooling circuit 100, etc.

[0067] Step 520: Output a control signal for adjusting the negative pressure component according to the data information.

[0068] It can be understood that the data acquisition module converts the detected physical quantity into an electrical signal and transmits it to the control module. The control module outputs a corresponding control signal based on the obtained data information to adjust the operating state of the negative pressure component.

[0069] Exemplarily, when the actual temperature of the heating element increases, the air extraction device 122 is controlled to increase the air extraction rate to reduce the pressure in the negative pressure chamber 121 and promote the vaporization of the phase change working fluid; when the actual temperature of the heating element decreases, the air extraction device 122 is controlled to reduce the air extraction rate to save energy.

[0070] The control method of the heat dissipation system provided in this embodiment dynamically adjusts the boiling point of the phase change working fluid through the data information obtained by the data acquisition module, realizes the dynamic adjustment of the temperature of the heating element, and improves the heat dissipation efficiency and reliability.

[0071] In some embodiments, the data information of the heating element in step 510 includes the actual temperature of the heating element; the outputting a control signal for adjusting the negative pressure component according to the data information in step 520 includes: Step 521: Compare the actual temperature with the target temperature of the heating element, and determine the variable of the air extraction rate of the air extraction device 122 according to the comparison result; Step 522: Adjust the actual air extraction rate of the air extraction device 122 according to the variable of the air extraction rate to obtain the adjusted air extraction rate; Step 523: Output a control signal including the adjusted air extraction rate.

[0072] It should be noted that the target temperature of the heating element can be adjusted according to the actual situation, and this embodiment does not make specific limitations on this.

[0073] It can be understood that the variable of the air extraction rate can be an increase or a decrease, and this embodiment does not make specific limitations on this. That is, as shown in Figure 3 , when the actual temperature is greater than the target temperature, the adjusted air extraction rate is obtained by the increase in the air extraction rate and the current actual air extraction rate, and a control signal including the adjusted air extraction rate is output to lower the phase change temperature of the phase change working medium; when the actual temperature is less than the target temperature, the adjusted air extraction rate is obtained by the decrease in the air extraction rate and the current actual air extraction rate, and a control signal including the adjusted air extraction rate is output to increase the phase change temperature of the phase change working medium; when the actual temperature is equal to the target temperature, the current actual air extraction rate of the air extraction device 122 is maintained.

[0074] In some embodiments, the data acquisition module includes a pressure sensor. A pressure sensor is arranged in the negative pressure chamber 121. By monitoring the pressure change in the negative pressure chamber 121 and combining the known volume and time in the negative pressure chamber 121, the actual air extraction rate of the air extraction device 122 is determined. Of course, in other embodiments, the data acquisition module may also include a flow sensor arranged on the air extraction device 122, that is, the actual air extraction rate of the air extraction device 122 is directly determined by the flow sensor, and this embodiment does not make specific limitations on this.

[0075] In some embodiments, as shown in Figure 3 , before comparing the actual temperature with the target temperature of the heating element in step 521, it further includes: Determine the target pressure of the negative pressure chamber 121 according to the target temperature; Output a control signal including the target pressure of the negative pressure chamber 121.

[0076] It can be understood that the target temperature of the heating element is to ensure that the heating element operates within a safe temperature range. The target pressure of the negative pressure chamber 121 refers to the pressure value that needs to be maintained in the negative pressure chamber 121 to achieve the target temperature, so as to ensure that the phase change working medium can undergo phase change after heat exchange with the heating element under this pressure state.

[0077] In some embodiments, determining the target pressure of the negative pressure chamber 121 according to the target temperature includes: Determine the phase change temperature of the phase change working medium according to the target temperature; Determine the target pressure of the negative pressure chamber 121 according to the phase change temperature of the phase change working medium.

[0078] It can be understood that the pressure magnitude of the negative pressure chamber 121 directly affects the phase change temperature of the phase change working fluid, that is, the greater the negative pressure, the lower the boiling point. Therefore, the phase change temperature of the phase change working fluid is determined by the target temperature of the heating element, and then the target pressure of the negative pressure chamber 121 is obtained, so as to ensure that the phase change working fluid vaporizes after heat exchange with the heating element.

[0079] In some embodiments, to determine the phase change temperature of the phase change working fluid according to the target temperature, the following formula needs to be satisfied: T = T0 - a, where: T is the phase change temperature of the phase change working fluid, T0 is the target temperature of the heating element, and a is a constant.

[0080] Exemplarily, assuming a = 15, the target temperature of the heating element T0 = 100 °C, the phase change temperature of the phase change working fluid T = 100 - 15 = 85 °C. It should be noted that the specific value of the constant a can be adjusted according to actual needs, and this embodiment does not make specific limitations on this.

[0081] In some embodiments, to determine the target pressure of the negative pressure chamber 121 according to the phase change temperature of the phase change working fluid, the following formula needs to be satisfied: In(P) = b - c / (T - d), where: P is the target pressure of the negative pressure chamber 121, and b, c, and d are all constants.

[0082] Exemplarily, Figure 4 is the phase diagram when the phase change working fluid is water. Cavitation refers to the process of the formation, development, and collapse of vapor or gas cavities (voids) inside the liquid or at the liquid-solid interface when the local pressure of the liquid drops below the saturation vapor pressure; boiling refers to the phenomenon that when the liquid reaches a certain temperature, bubbles form inside the liquid and rapidly expand to the surface and burst. This embodiment mainly involves boiling, that is, the phase change temperature of the phase change working fluid refers to the boiling point temperature of the phase change working fluid, that is, b = 9.3876, c = 3826.36, d = 45.47. Continuing with the above example, when T = 85 °C, according to In(P) = 9.3876 - 3826.36 / (T - 45.47), it can be known that the target pressure P of the negative pressure chamber 121 = 60 kPa. It should be noted that the specific values of the constants b, c, and d can be adjusted according to actual needs, and this embodiment does not make specific limitations on this.

[0083] In some embodiments, the control method of the heat dissipation system further includes: obtaining the liquid level information of the negative pressure chamber 121 through the data acquisition module; outputting a control signal for starting and stopping the driving circulation pump 123 according to the liquid level information of the negative pressure chamber 121.

[0084] It can be understood that the liquid level information of the negative pressure chamber 121 reflects the stock of the liquid phase change working medium in the negative pressure chamber 121. That is, too high a liquid level may cause the liquid working medium to overflow from the air outlet end of the negative pressure chamber 121 and enter the air extraction device 122, affecting the normal operation of the air extraction device 122; too low a liquid level may lead to insufficient liquid phase change working medium, affecting the heat dissipation effect. According to the liquid level height in the negative pressure chamber 121 obtained by the data acquisition module in real time, the start and stop of the circulation pump 123 are controlled to ensure that the liquid phase change working medium can maintain an appropriate liquid level in the negative pressure chamber 121, realizing dynamic adjustment of the circulation flow rate of the liquid phase change working medium, reducing unnecessary energy consumption, and at the same time ensuring the stability of the heat dissipation effect.

[0085] Exemplarily, when the liquid level information of the negative pressure chamber 121 is lower than the first threshold (that is, the liquid phase change working medium in the negative pressure chamber 121 is at a low liquid level), a control signal for pausing the circulation pump 123 is output, so that the liquid phase change working medium accumulates in the negative pressure chamber 121; when the liquid level information of the negative pressure chamber 121 is higher than the second threshold (that is, the liquid phase change working medium in the negative pressure chamber 121 is at a high liquid level), a control signal for starting the circulation pump 123 is output, so that the liquid phase change working medium in the negative pressure chamber 121 flows into the condenser 130 and enters the cooling cycle. It should be noted that the numerical values of the first threshold and the second threshold can be adjusted according to the actual situation, and this embodiment does not make specific limitations on this.

[0086] In some embodiments, the data acquisition module includes a first liquid level sensor, and the first liquid level sensor is arranged in the negative pressure chamber 121 for real-time monitoring of the liquid level in the negative pressure chamber 121. Exemplarily, the first liquid level sensor includes but is not limited to a static pressure type liquid level sensor, an ultrasonic type liquid level sensor or a capacitance type liquid level sensor.

[0087] In some embodiments, the control method of the heat dissipation system further includes: Obtaining the liquid level information of the liquid collection chamber 141 through the data acquisition module; Outputting a control signal for driving the liquid supply pump 220 to start and stop according to the liquid level information of the liquid collection chamber 141.

[0088] It can be understood that the liquid level information of the liquid collection chamber 141 reflects the stock of the liquid phase change working medium in the liquid collection chamber 141. That is, too high a liquid level indicates that there is more phase change working medium in the cooling circuit 100, and a control signal for pausing the liquid supply pump 220 is output to reduce the risk of liquid working medium overflow or too high pressure in the heat dissipation system; too low a liquid level may lead to insufficient liquid phase change working medium, and a control signal for starting the liquid supply pump 220 is output to maintain the heat dissipation function of the heat dissipation system.

[0089] Exemplarily, when the liquid level information in the liquid collection cavity 141 is lower than the fifth threshold value (i.e., the phase change working medium in the liquid collection cavity 141 is at a low liquid level), a control signal for driving the liquid replenishing pump 220 to start is output, so as to replenish the phase change working medium in the liquid collection cavity 141 by using the liquid replenishing cavity 211; when the liquid level information in the liquid collection cavity 141 is higher than the sixth threshold value (i.e., the phase change working medium in the liquid collection cavity 141 is at a high liquid level), a control signal for driving the liquid replenishing pump 220 to pause is output.

[0090] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation method.

[0091] As Figure 5 shown, the embodiment of the present application further provides a computer program product, including an acquisition unit 610 and an output unit 620 for acquiring data information of the heating element; the output unit 620 is used to output a control signal for adjusting the negative pressure component according to the data information.

[0092] The computer program product provided in this embodiment outputs a control signal for adjusting the negative pressure component according to the acquired data information, realizes dynamic adjustment of the temperature of the heating element, and improves the heat dissipation efficiency and reliability.

[0093] For the description of the features in the corresponding embodiment of the computer program product, reference can be made to the relevant description in the corresponding embodiment of the control method of the heat dissipation system, which will not be elaborated here one by one.

[0094] In some embodiments, the output unit 620 is used to output a control signal for adjusting the negative pressure component according to the data information, specifically including the following steps: Compare the actual temperature with the target temperature of the heating element, and determine the variable of the pumping rate of the air extraction device 122 according to the comparison result; Adjust the actual pumping rate of the air extraction device 122 according to the variable of the pumping rate to obtain the adjusted pumping rate; Output a control signal including the adjusted pumping rate.

[0095] In some embodiments, the output unit 620 is further used for: Determine the target pressure of the negative pressure cavity 121 according to the target temperature; Output a control signal including the target pressure of the negative pressure cavity 121.

[0096] In some embodiments, the acquisition unit 610 is further used to acquire the liquid level information of the negative pressure cavity 121 through the data acquisition module; the output unit 620 is further used to output a control signal for driving the circulation pump 123 to start and stop according to the liquid level information of the negative pressure cavity 121.

[0097] In some embodiments, the obtaining unit 610 is further configured to obtain the liquid level information of the liquid collection cavity 141 through the data acquisition module; the output unit 620 is further configured to output a control signal for driving the liquid replenishing pump 220 to start and stop according to the liquid level information of the liquid collection cavity 141.

[0098] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, and the computer program is configured to execute the steps in any of the above-described embodiments of the control method of the heat dissipation system when running.

[0099] In an exemplary embodiment, the above computer-readable storage medium may include, but is not limited to: various media such as USB flash drives, read-only memories (ROM for short), random access memories (RAM for short), mobile hard disks, magnetic disks, or optical discs that can store computer programs.

[0100] An embodiment of the present application further provides a computer program product, the above computer program product includes a computer program, and when the computer program is executed by a processor, the steps in any of the above-described embodiments of the control method of the heat dissipation system are implemented.

[0101] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above-described embodiments of the control method of the heat dissipation system are implemented.

[0102] Those skilled in the art can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0103] The above has introduced in detail a heat dissipation system, an electronic device, a control method and a program product of the heat dissipation system provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A heat dissipation system, characterized in that, Comprising: A cooling circuit, the cooling circuit comprising a connected cold plate, a negative pressure assembly and a condenser, the cold plate being used for heat exchange with a heating element, an inlet end of the negative pressure assembly being in communication with an outlet end of the cold plate, the negative pressure assembly being used for forming a negative pressure environment, the condenser being used for heat exchange with the outside, an outlet end of the condenser being in communication with an inlet end of the cold plate, an air inlet end of the condenser being in communication with an air outlet end of the negative pressure assembly, and a liquid inlet end of the condenser being in communication with a liquid outlet end of the negative pressure assembly; A data acquisition module, at least used for acquiring data information of the heating element; A control module, at least used for outputting a control signal for adjusting the negative pressure assembly according to the data information.

2. The heat dissipation system according to claim 1, characterized in that The negative pressure assembly comprises: A housing, forming a negative pressure chamber, the negative pressure chamber being used for accommodating a phase change working fluid in a gas-liquid two-phase state, an inlet end of the negative pressure chamber being in communication with an outlet end of the cold plate; An air extraction device, used for generating negative pressure in the negative pressure chamber, an air inlet end of the air extraction device being in communication with an air outlet end of the negative pressure chamber, and an air outlet end of the air extraction device being in communication with an air inlet end of the condenser; A circulation pump, respectively connected to a liquid outlet end of the negative pressure chamber and a liquid inlet end of the condenser, used for driving the liquid phase change working fluid to flow from the negative pressure chamber into the condenser.

3. The heat dissipation system according to claim 2, wherein, The data information of the heating element includes the actual temperature of the heating element, and the control signal includes the air extraction rate of the air extraction device.

4. The heat dissipation system according to claim 2, wherein The data acquisition module is further used for acquiring the liquid level information of the negative pressure chamber, and the control module is used for outputting a control signal for driving the circulation pump to start and stop according to the liquid level information of the negative pressure chamber.

5. The heat dissipation system according to any one of claims 1 to 4, characterized in that The cooling circuit further comprises: A liquid collecting member, forming a liquid collecting chamber, a liquid inlet end of the liquid collecting chamber being in communication with an outlet end of the condenser, and a liquid outlet end of the liquid collecting chamber being in communication with an inlet end of the cold plate.

6. The heat dissipation system according to claim 5, characterized in that, Further comprising: A liquid replenishing member, forming a liquid replenishing chamber for storing the phase change working fluid, a liquid inlet end of the liquid replenishing chamber being in communication with an inlet end of the cold plate; A liquid replenishing pump, respectively connected to a liquid inlet end of the liquid collecting chamber and a liquid outlet end of the liquid replenishing chamber, used for driving the liquid phase change working fluid to flow from the liquid replenishing chamber into the liquid collecting chamber.

7. The heat dissipation system according to claim 6, wherein The data acquisition module is further used for acquiring the liquid level information of the liquid collecting chamber, and the control module is further used for outputting a control signal for driving the liquid replenishing pump to start and stop according to the liquid level information of the liquid collecting chamber.

8. The heat dissipation system according to any one of claims 1 to 4, characterized in that, The cooling circuit further comprises: An exhaust valve, arranged between an outlet end of the condenser and an inlet end of the cold plate, used for exhausting air to the outside.

9. An electronic device, characterized in that, Comprising: A heating element; And A heat dissipation system according to any one of claims 1 to 8, the heat dissipation system being used for dissipating heat from the heating element.

10. A control method for a heat dissipation system, which is applied to the heat dissipation system according to any one of claims 1 to 8, characterized in that, The control method comprises: Obtaining data information of a heating element through a data acquisition module; Outputting a control signal for adjusting a negative pressure assembly according to the data information.

11. The control method of the heat dissipation system according to claim 10, characterized in that, The data information of the heating element includes the actual temperature of the heating element; the outputting a control signal for adjusting the negative pressure assembly according to the data information includes: Comparing the actual temperature with a target temperature of the heating element, and determining a variable of the air extraction rate of the air extraction device according to a comparison result. Adjust the actual air extraction rate of the air extraction device according to the variable of the air extraction rate to obtain the adjusted air extraction rate; Output a control signal including the adjusted air extraction rate.

12. The control method of the heat dissipation system according to claim 11, characterized in that, Before comparing the actual temperature with the target temperature of the heating element, it further includes: Determine the target pressure of the negative pressure chamber according to the target temperature; Output a control signal including the target pressure of the negative pressure chamber.

13. The control method of the heat dissipation system according to claim 11, characterized in that, It further includes: Obtain the liquid level information of the negative pressure chamber through the data acquisition module; output a control signal for driving the start and stop of the circulation pump according to the liquid level information of the negative pressure chamber; and / or Obtain the liquid level information of the liquid collection chamber through the data acquisition module; output a control signal for driving the start and stop of the liquid supplement pump according to the liquid level information of the liquid collection chamber.

14. A computer program product, characterized in that, It includes: An acquisition unit for acquiring data information of the heating element; An output unit for outputting a control signal for adjusting the negative pressure component according to the data information.

15. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium, wherein when the computer program is executed by a processor, the steps of the control method of the heat dissipation system according to any one of claims 10 to 13 are implemented.

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