Equipment liquid cooling system

Abstract

The utility model discloses an equipment liquid cooling system, and relates to the technical field of equipment cooling, the equipment liquid cooling system comprises a cooling capacity distribution unit, a liquid-liquid heat exchanger of the cooling capacity distribution unit comprises a first pipeline and a second pipeline which are arranged in parallel for heat exchange, and the first pipeline is filled with a two-phase liquid cooling working medium; the multiple cooling branch pipelines are arranged in parallel, and the two ends of each cooling branch pipeline are connected with the two ends of the first pipeline correspondingly; the equipment cabinet is filled with a single-phase liquid cooling working medium, and an immersion heat exchanger in the equipment cabinet is arranged on a first cooling branch pipeline in the multiple cooling branch pipelines so that heat exchange can be conducted between the two-phase liquid cooling working medium and the single-phase liquid cooling working medium. The heating cooling pipeline of the heating equipment in the cabinet is arranged on the second cooling branch pipeline in the plurality of cooling branch pipelines, so that the problems of poor heat dissipation effect and reliability of the heat dissipation mode of the high-power electronic device in the prior art are solved; the technical effects of simplifying the structure of the liquid cooling system and improving the heat dissipation degree of the high-power electronic device are achieved.

Description

Technical Field

[0001] This application relates to the technical field of equipment cooling, and particularly to a liquid cooling system for equipment. Background Art

[0002] In the current information technology field, especially in data centers and artificial intelligence computing devices, with the significant increase in device density and power consumption, air cooling technology can no longer meet the heat dissipation requirements of high-power devices (such as GPUs / CPUs), and there are problems such as low heat dissipation efficiency and high noise. Therefore, the industry has begun to explore more efficient liquid cooling technologies to address the challenges. However, there are still many problems with current cooling technologies. For example, single-phase immersion liquid cooling has deficiencies in the local heat dissipation capacity of high-power density devices, and often requires additional installation of large-sized radiators or cold plates to assist in heat dissipation, which not only increases the complexity and cost of the system, reduces the density and space utilization rate of the cabinet, but also the additional cold plates or radiators may affect the natural circulation of the liquid and reduce the heat dissipation efficiency; two-phase cold plate liquid cooling can more effectively handle the heat dissipation of high-power chips, but since it can only cover some high-power chips and has insufficient coverage for other components in the server (such as memory, hard disk, network card, etc.), additional heat dissipation solutions are required, and there is a risk of leakage when using a water cooling system, which may cause equipment short circuits and seriously affect the safety and reliability of the data center; although water-cooled cold plate liquid cooling can effectively handle the heat dissipation of high-power density devices, since water is used as the cooling medium, there is a risk of short circuit easily caused after leakage, posing a potential threat to the safety of data center equipment.

[0003] In response to this, some hybrid heat dissipation solutions have been proposed, attempting to combine immersion liquid cooling and cold plate liquid cooling technologies in order to achieve a better heat dissipation effect. However, these solutions often require the separate setting of independent circulation pumps and cold quantity distribution units (CDUs) in the immersion liquid cooling part and the cold plate liquid cooling part, which leads to a complex structure, reduced reliability, and increased cost of the liquid cooling system. In addition, cold plate liquid cooling uses single-phase water cooling, and equipment damage is easily caused after leakage. Summary of the Utility Model

[0004] This application provides a liquid cooling system for equipment to at least solve the problems of poor heat dissipation effect and reliability of the heat dissipation method for high-power electronic devices in related technologies.

[0005] The present application provides a device liquid cooling system, including: a cooling capacity distribution unit, including a liquid-liquid heat exchanger, the liquid-liquid heat exchanger includes a first pipeline and a second pipeline arranged in parallel for heat exchange, the first pipeline is filled with a two-phase liquid cooling working medium, and both ends of the second pipeline are respectively connected to an external liquid supply pipeline and a liquid return pipeline; a plurality of cooling branch pipelines, the plurality of cooling branch pipelines are arranged in parallel, and both ends of each cooling branch pipeline are respectively connected to both ends of the first pipeline, and the plurality of cooling branch pipelines include a first cooling branch pipeline and a second cooling branch pipeline; a cabinet, the cabinet is filled with a single-phase liquid cooling working medium, and an immersion heat exchanger and a heating device are also arranged at intervals in the cabinet, the immersion heat exchanger is arranged on the first cooling branch pipeline to enable heat exchange between the two-phase liquid cooling working medium and the single-phase liquid cooling working medium, and the heating cooling pipeline of the heating device is arranged on the second cooling branch pipeline.

[0006] Further, the device liquid cooling system includes a circulation pump, the inlet of the circulation pump is connected to the outlet of the first pipeline, and the outlet of the circulation pump is connected to the inlets of each cooling branch pipeline.

[0007] Further, the device liquid cooling system includes a plurality of throttle valves, and the plurality of throttle valves are respectively arranged at the inlets of the plurality of cooling branch pipelines.

[0008] Further, the plurality of throttle valves include a first throttle valve and a second throttle valve, the first throttle valve is arranged at the inlet of the first cooling branch pipeline, and the second throttle valve is arranged at the inlet of the second cooling branch pipeline.

[0009] Further, the device liquid cooling system further includes a temperature detection component, the temperature detection component is arranged in the cabinet, the cooling capacity distribution unit is electrically connected to both the temperature detection component and the first throttle valve, the temperature detection component is used to detect the real-time temperature of the single-phase liquid cooling working medium, and the cooling capacity distribution unit is used to receive the detection result of the temperature detection component and adjust the opening of the first throttle valve according to the detection result.

[0010] Further, the cooling capacity distribution unit further includes a control unit, a filter, a liquid collector and a cooling capacity distribution control valve, the control unit is electrically connected to the cooling capacity distribution control valve, and the cooling capacity distribution control valve, the filter and the liquid collector are arranged at the outlet of the first pipeline in sequence along the direction away from the first pipeline; the device liquid cooling system includes: a circulation pump, the inlet of the circulation pump is connected to the outlet of the first pipeline, the outlet of the circulation pump is connected to the inlets of each cooling branch pipeline, and the circulation pump is located on the side of the liquid collector away from the filter; a plurality of throttle valves, and the plurality of throttle valves are respectively arranged at the inlets of the plurality of cooling branch pipelines.

[0011] Further, the first cooling branch pipeline includes a first liquid supply section and a first liquid return section. The inlet of the first liquid supply section is connected to the outlet of the first pipeline, and the outlet of the first liquid return section is connected to the inlet of the first pipeline. The immersion heat exchanger includes heat exchange tubes and a plurality of fins arranged at intervals on the heat exchange tubes. The two ends of the heat exchange tubes are respectively connected to the outlet of the first liquid supply section and the inlet of the first liquid return section.

[0012] Further, the second cooling branch pipeline includes a second liquid supply section and a second liquid return section. The inlet of the second liquid supply section is connected to the outlet of the first pipeline, and the outlet of the second liquid return section is connected to the inlet of the first pipeline. The heating device includes a heating main body. The heating and cooling pipeline is in contact with the heating main body to receive the heat emitted by the heating main body. The two ends of the heating and cooling pipeline are respectively connected to the outlet of the second liquid supply section and the inlet of the second liquid return section.

[0013] Further, the heating device further includes: a heating throttle valve provided at the inlet of the heating and cooling pipeline; and / or a housing, with the heating main body and part of the heating and cooling pipeline arranged inside the housing.

[0014] Further, the number of immersion heat exchangers is multiple, and the multiple immersion heat exchangers are arranged at intervals in the cabinet. The number of the first cooling branch pipelines is also multiple, and the multiple first cooling branch pipelines are arranged in one-to-one correspondence with the multiple immersion heat exchangers; and / or the number of heating devices is multiple, and the multiple heating devices are arranged at intervals in the cabinet. The number of the second cooling branch pipelines is also multiple, and the multiple second cooling branch pipelines are arranged in one-to-one correspondence with the multiple heating devices.

[0015] With this application, since the equipment liquid cooling system includes: a cooling capacity distribution unit including a liquid-liquid heat exchanger, the liquid-liquid heat exchanger includes a first pipeline and a second pipeline arranged in parallel for heat exchange, the first pipeline is filled with a two-phase liquid cooling working medium, and both ends of the second pipeline are respectively connected to an external liquid supply pipeline and a liquid return pipeline; a plurality of cooling branch pipelines, the plurality of cooling branch pipelines are arranged in parallel, and both ends of each cooling branch pipeline are respectively connected to both ends of the first pipeline; a cabinet, the cabinet is filled with a single-phase liquid cooling working medium, and an immersion heat exchanger and a heating device are also arranged at intervals in the cabinet, the immersion heat exchanger is arranged on the first cooling branch pipeline among the plurality of cooling branch pipelines to enable heat exchange between the two-phase liquid cooling working medium and the single-phase liquid cooling working medium, and the heating and cooling pipeline of the heating device is arranged on the second cooling branch pipeline among the plurality of cooling branch pipelines. In this way, the equipment liquid cooling system of this application can not only dissipate heat from the heating devices in the cabinet by using a two-phase liquid cooling working medium, greatly improving the heat dissipation effect of heating devices including high-power devices, reducing the temperature of the heating devices, and improving the working performance and reliability of the heating devices, but also meet the heat dissipation requirements of some low-power devices in the cabinet and the heating devices except for high-power devices through natural convection heat transfer between the single-phase liquid cooling working medium and the two-phase liquid cooling working medium flowing through the immersion heat exchanger, solving the problems of poor heat dissipation effect and reliability of the heat dissipation method for high-power electronic devices in the related art, and the immersion liquid cooling part using the single-phase liquid cooling working medium does not need to be provided with components such as a separate circulation pump and a cooling capacity distribution unit, making the equipment liquid cooling system of this application simple in structure, low in production cost and maintenance difficulty, achieving the technical effect of simplifying the structure of the liquid cooling system and improving the heat dissipation degree of high-power electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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.

[0017] Figure 1 Schematic connection diagram of an equipment liquid cooling system provided by an embodiment of the present application;

[0018] Figure 2 is Figure 1 Schematic structural diagram of the heating device of the equipment liquid cooling system shown;

[0019] Figure 3 is Figure 1 Schematic structural diagram of the immersion heat exchanger of the equipment liquid cooling system shown.

[0020] Among them, the above-mentioned drawings include the following reference numerals:

[0021] 1. Cold quantity distribution unit; 11. First cooling branch pipeline; 111. First liquid supply section; 112. First liquid return section; 12. Second cooling branch pipeline; 121. Second liquid supply section; 122. Second liquid return section;

[0022] 2. Cabinet;

[0023] 3. Heat generating device; 31. Housing; 32. Heat generating main body; 33. Heat generating cooling pipeline; 34. Heat generating throttle valve;

[0024] 4. Immersion heat exchanger; 41. First immersion heat exchanger; 42. Second immersion heat exchanger;

[0025] 5. Throttle valve; 51. First throttle valve; 52. Second throttle valve;

[0026] 6. Temperature detection component;

[0027] 7. Circulation pump;

[0028] 8. Liquid supply pipeline;

[0029] 9. Liquid return pipeline. Specific implementation mode

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with 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 belong to the protection scope of the present application.

[0031] It should be noted that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "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 drawings. It 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. Therefore, it should not be construed as a limitation to the present application. The terms "mounted", "connected", "coupled" 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, 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", "equal" include the described situations and situations similar to the described situations, and the range of the similar situations is within an acceptable deviation range, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurements being discussed and the errors associated with the measurements of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, where the acceptable deviation range of approximate parallel can be, for example, within 5° deviation; "perpendicular" includes absolute perpendicular and approximate perpendicular, where the acceptable deviation range of approximate perpendicular can also be, for example, within 5° deviation. "Equal" includes absolute equal and approximate equal, where the acceptable deviation range of approximate equal can be, for example, the difference between the two equal ones is less than or equal to 5% of either one. 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.

[0032] For convenience of description, spatial relative terms such as "above", "over", "on the upper surface", "above-mentioned", etc. can be used here to describe the spatial positional relationship of one device or feature shown in the drawings with other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientation of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used here will be made.

[0033] To enable those skilled in the art of the present technology to better understand the solution of this application, the following further detailed description of this application will be given in conjunction with the accompanying drawings and specific embodiments.

[0034] As Figures 1 to 3 shown, this application provides a device liquid cooling system, including: a cold quantity distribution unit 1, including a liquid-liquid heat exchanger, the liquid-liquid heat exchanger includes a first pipeline and a second pipeline arranged in parallel for heat exchange, the first pipeline is filled with a two-phase liquid cooling working medium, and both ends of the second pipeline are respectively connected to an external liquid supply pipeline 8 and a liquid return pipeline 9; a plurality of cooling branch pipelines, the plurality of cooling branch pipelines are arranged in parallel, and both ends of each cooling branch pipeline are respectively connected to both ends of the first pipeline, the plurality of cooling branch pipelines include a first cooling branch pipeline 11 and a second cooling branch pipeline 12; a cabinet 2, the cabinet 2 is filled with a single-phase liquid cooling working medium, and an immersion heat exchanger 4 and a heating device 3 are also arranged at intervals in the cabinet 2, the immersion heat exchanger 4 is arranged on the first cooling branch pipeline 11 to enable heat exchange between the two-phase liquid cooling working medium and the single-phase liquid cooling working medium, and the heating and cooling pipeline 33 of the heating device 3 is arranged on the second cooling branch pipeline 12.

[0035] In this way, the device liquid cooling system of this application can not only dissipate heat from the heating device 3 in the cabinet 2 by using a two-phase liquid cooling working medium, greatly improving the heat dissipation effect on the heating device 3 including high-power consumption devices, reducing the temperature of the heating device 3, and improving the working performance and reliability of the heating device 3, but also can meet the heat dissipation requirements of some low-power consumption devices in the cabinet 2 and the heating device 3 except for high-power consumption devices through natural convection heat transfer between the single-phase liquid cooling working medium and the two-phase liquid cooling working medium flowing through the immersion heat exchanger 4. It can be configured according to the heat dissipation requirements of different devices to effectively cool different components in the cabinet, improve the cooling efficiency and resource utilization rate, solve the problem of poor heat dissipation effect and reliability of the heat dissipation method for high-power electronic devices in the related art, and the immersion liquid cooling part using the single-phase liquid cooling working medium does not need to be provided with components such as a separate circulation pump and a cold quantity distribution unit, making the device liquid cooling system of this application simple in structure, reducing the production cost and maintenance difficulty, and achieving effective cooling of different components in the cabinet 2.

[0036] Specifically, the cabinet 2 of this application is a cabinet for a data center, a supercomputer center, and server / storage / network devices, etc. Through the hybrid liquid cooling technology of this application, the heat dissipation problems of high-power consumption devices and low-power consumption devices in the cabinet 2 can be solved, while reducing energy consumption and improving space utilization rate.

[0037] Among them, high-power devices are provided in the heating device 3, and these high-power devices dissipate heat efficiently through the phase change latent heat of the two-phase liquid cooling working medium passing through the heating and cooling pipeline 33. In addition, some low-power devices (such as memory, hard disk, network card, etc.) are also provided in the cabinet 2 and the heating device 3. These low-power devices can be immersed in the single-phase liquid cooling working medium and cooled by the heat absorption of the single-phase liquid cooling working medium. Finally, the heat absorbed by the single-phase liquid cooling working medium is also carried away by the two-phase liquid cooling working medium passing through the immersion heat exchanger 4, etc.

[0038] When the cabinet 2 of the present application is a liquid-cooled server cabinet, it is similar to a general single-phase immersion liquid-cooled cabinet and can be called a Tank. Servers, storage, and network devices that need to dissipate heat are installed in the cabinet 2.

[0039] The single-phase liquid cooling working medium of the present application can effectively meet the heat dissipation requirements of low-power components in the cabinet, and at the same time form a complement with the two-phase liquid cooling working medium part, ensuring flexibility and efficiency in dealing with high-power devices and low-power devices, and abandoning independent circulation pumps, etc. used to promote the circulation of the single-phase liquid cooling working medium in the traditional hybrid liquid cooling system. This design not only significantly simplifies the structure of the equipment liquid cooling system, makes the layout in the cabinet 2 more flexible, reduces the need for additional space, improves the space utilization rate of data centers, etc. and the density of equipment deployment, reduces potential errors and downtime during maintenance, makes the maintenance difficulty better, and greatly reduces the initial construction and operation costs of the system, improving the reliability and stability of the overall equipment liquid cooling system.

[0040] Since the single-phase liquid cooling working medium part relies on the natural convection of the coolant to dissipate heat, it can make full use of the physical characteristics that the volume of the liquid expands and the density decreases after being heated, so that the heated coolant naturally floats, while the low-temperature liquid sinks, thus forming an automatic heat dissipation process. While meeting the heat dissipation requirements of low-power devices, it also saves energy and improves the heat dissipation efficiency. In addition, the immersion liquid cooling technology of the single-phase liquid cooling working medium adopted in the present application makes all devices completely immersed in the coolant, effectively isolating external dust, particulate matter, and moisture, maintaining a clean environment inside the cabinet, and eliminating the noise of active heat dissipation components such as fans, creating an almost silent working environment. This not only improves the working comfort of operators but also reduces the impact of noise pollution on the surrounding environment.

[0041] Both the two-phase liquid cooling working fluid and the single-phase liquid cooling working fluid used in this application are non-conductive working fluids. Their insulation characteristics (breakdown voltage > 20 kV / mm) can ensure that even in the event of leakage or accident in the equipment liquid cooling system, it will not cause a short circuit in the electrical system, thus ensuring the safe operation of each component in cabinet 2, improving the overall availability of data centers, etc., and the continuity of data is extremely important. Especially in critical business and large-scale cloud computing environments, major accidents caused by coolant leakage in data centers, etc., are prevented. Moreover, the non-conductive working fluid has good chemical stability and corrosion resistance, which can reduce the corrosion of electronic devices and extend their service life. In addition, the non-conductive working fluid is also an environmentally friendly refrigerant, which helps to reduce the damage to the ozone layer and the contribution to global warming, meeting the trend of sustainable development.

[0042] The equipment liquid cooling system of this application can, by setting up multiple parallel cooling branch pipelines, ensure that the cooling requirements of both the heat-generating equipment 3 and the immersion heat exchanger 4 are met simultaneously, can flexibly adapt to the refrigerant requirements of different components, and improve the overall heat dissipation efficiency.

[0043] Specifically, the equipment liquid cooling system of this application can increase the power density to 5 kw / U to 10 kw / U, and a single cabinet can support up to more than 200 kw.

[0044] As Figure 1 shown, the equipment liquid cooling system includes a circulation pump 7. The inlet of the circulation pump 7 is connected to the outlet of the first pipeline, and the outlet of the circulation pump 7 is connected to the inlets of each cooling branch pipeline to pump the two-phase liquid cooling working fluid from the cold quantity distribution unit 1 into each cooling branch pipeline. By driving the two-phase liquid cooling working fluid to circulate in the equipment liquid cooling system through the circulation pump 7, the continuous flow and heat exchange efficiency of the two-phase liquid cooling working fluid are ensured, making the equipment liquid cooling system operate stably, with high heat dissipation efficiency, and capable of quickly responding to the heat dissipation requirements of the equipment.

[0045] As Figure 1 shown, the equipment liquid cooling system includes a plurality of throttle valves 5. The plurality of throttle valves 5 are respectively arranged at the inlets of the plurality of cooling branch pipelines, and can dynamically adjust the flow rate of the two-phase liquid cooling working fluid in each cooling branch pipeline according to actual needs, so as to reasonably distribute the cold quantity and control the temperature in each cooling branch pipeline, avoid overcooling or overheating, and adapt to the heat dissipation requirements of different devices, reducing energy consumption while improving the heat dissipation efficiency.

[0046] As Figure 1 shown, the plurality of throttle valves 5 include a first throttle valve 51 and a second throttle valve 52. The first throttle valve 51 is arranged at the inlet of the first cooling branch pipeline 11, and the second throttle valve 52 is arranged at the inlet of the second cooling branch pipeline 12.

[0047] In this way, by setting throttle valves on different cooling branch pipelines, the present application realizes independent control of the refrigerating capacity in the corresponding immersion heat exchangers and heating devices, so as to meet the different heat dissipation requirements of each cooling branch pipeline, can more finely adjust the distribution of the two-phase liquid cooling working medium, improve the heat dissipation efficiency and flexibility, better cope with the complex and changeable heat dissipation requirements, and improve the stability and efficiency of equipment operation.

[0048] As Figure 1 shown, the equipment liquid cooling system further includes a temperature detection component 6. The temperature detection component 6 is arranged in the cabinet 2. The cooling capacity distribution unit 1 is electrically connected to both the temperature detection component 6 and the first throttle valve 51. The temperature detection component 6 is used to detect the real-time temperature of the single-phase liquid cooling working medium, and the cooling capacity distribution unit 1 is used to receive the detection result of the temperature detection component 6 and adjust the opening degree of the first throttle valve 51 according to the detection result.

[0049] The present application sets the temperature detection component 6 to monitor the real-time temperature of the single-phase liquid cooling working medium in the cabinet 2 in real time, so that the cooling capacity distribution unit automatically adjusts the opening degree of the corresponding first throttle valve 51 according to the detection result, so as to adjust the flow rate of the two-phase liquid cooling working medium flowing through the corresponding first cooling branch pipeline 11, so as to maintain the temperature of the single-phase liquid cooling working medium within the optimal range, improve the cooling efficiency and performance of the equipment liquid cooling system, and improve the reliability and performance of the equipment liquid cooling system.

[0050] In addition, the cooling capacity distribution unit 1 can also be electrically connected to the second throttle valve 52 to control the opening degree of the second throttle valve 52.

[0051] Specifically, the temperature detection component 6 can be a thermocouple, a thermal resistance, an infrared temperature sensor, an optical fiber temperature sensor, a liquid crystal thermometer, a bimetallic thermometer, an infrared thermal imager, a specific gravity thermometer, a pressure thermometer, etc.

[0052] As Figure 1 shown, the cooling capacity distribution unit 1, also known as Cooling Distribution Units, i.e., CUD, the cooling capacity distribution unit 1 further includes a control unit, a filter, a liquid collector and a cooling capacity distribution control valve. The control unit is electrically connected to the cooling capacity distribution control valve. The cooling capacity distribution control valve, the filter and the liquid collector are sequentially arranged at the outlet of the first pipeline along the direction away from the first pipeline; the equipment liquid cooling system includes: a circulation pump 7. The inlet of the circulation pump 7 is connected to the outlet of the first pipeline, the outlet of the circulation pump 7 is connected to the inlets of each cooling branch pipeline, and the circulation pump 7 is located on the side of the liquid collector away from the filter; a plurality of throttle valves 5, and a plurality of throttle valves 5 are correspondingly arranged at the inlets of the plurality of cooling branch pipelines.

[0053] The cooling capacity distribution unit 1 of the present application realizes the comprehensive management and control of the refrigerating capacity through the integrated control unit, filter, liquid accumulator and cooling capacity distribution control valve, ensures the quality and circulation efficiency of the two-phase liquid cooling working medium, makes the operation of the equipment cooling system more stable and reliable, can better meet the heat dissipation requirements of high-density and high-power-consuming devices, and improves the stability and efficiency of the equipment operation.

[0054] The control unit of the cooling capacity distribution unit 1 of the present application is electrically connected to the temperature detection component 6, the first throttle valve 51 and the second throttle valve 52 respectively, so as to control the opening degrees of the first throttle valve 51 and the second throttle valve 52 according to the detection result of the temperature detection component 6.

[0055] As Figure 1 and Figure 3 shown, the first cooling branch pipeline 11 includes a first liquid delivery section 111 and a first liquid return section 112. The inlet of the first liquid delivery section 111 is connected to the outlet of the first pipeline, and the outlet of the first liquid return section 112 is connected to the inlet of the first pipeline; the immersion heat exchanger 4 includes heat exchange tubes and a plurality of fins arranged at intervals on the heat exchange tubes. The two ends of the heat exchange tubes are respectively connected to the outlet of the first liquid delivery section 111 and the inlet of the first liquid return section 112.

[0056] In this way, through the combination of the heat exchange tubes and fins of the immersion heat exchanger 4 of the present application, the heat exchange area between the immersion heat exchanger 4 and the single-phase liquid cooling working medium is increased, the heat exchange efficiency is improved, the heat transfer can be carried out more effectively, the cooling effect is improved, so that the equipment liquid cooling system can better handle the large amount of heat generated during the operation of the equipment, and the stability and reliability of the operation of the equipment liquid cooling system are improved.

[0057] As Figure 1 and Figure 2 shown, the second cooling branch pipeline 12 includes a second liquid delivery section 121 and a second liquid return section 122. The inlet of the second liquid delivery section 121 is connected to the outlet of the first pipeline, and the outlet of the second liquid return section 122 is connected to the inlet of the first pipeline; the heating device 3 includes a heating main body 32, and the heating and cooling pipeline 33 is in contact with the heating main body 32 to receive the heat emitted by the heating main body 32. The two ends of the heating and cooling pipeline 33 are respectively connected to the outlet of the second liquid delivery section 121 and the inlet of the second liquid return section 122.

[0058] In this way, through the direct contact between the heating and cooling pipeline 33 and the heating main body 32, the heat dissipation requirements of high-power-consuming devices can be quickly responded to, the effective cooling of high-power-consuming devices can be realized, the cooling efficiency is improved, and at the same time, the temperature of high-power-consuming devices is reduced, and the performance and service life of high-power-consuming devices are improved.

[0059] Specifically, the heating main body 32 is a high-power-consuming device. In addition to the heating main body 32, the heating device 3 may also include some low-power-consuming devices, such as hard disks, memories, circuit boards, etc.

[0060] As Figure 1 shown, the heating device 3 further includes: a heating throttle valve 34 disposed at the inlet of the heating and cooling pipeline 33; and / or a housing 31, where the heating body 32 and a part of the heating and cooling pipeline 33 are disposed within the housing 31.

[0061] By adjusting the opening degree of the heating throttle valve 34 in this application, the flow rate of the two-phase liquid cooling working medium flowing into the heating and cooling pipeline 33 can be controlled, and the refrigerating capacity can be controlled to meet the actual heat dissipation requirements of the heating body 32; the setting of the housing 31 is to protect the heating body 32 and the heating and cooling pipeline 33, improve the reliability and safety, and can more flexibly meet the heat dissipation requirements of different heating devices.

[0062] In the heating device 3 of this application, the number of the heating bodies 32 is one; or the number of the heating bodies 32 is multiple, and the multiple heating bodies 32 are arranged at intervals within the housing 31, and the heating and cooling pipeline 33 passes through each heating body 32 in sequence.

[0063] The control unit of the cooling capacity distribution unit 1 of this application is electrically connected to the heating throttle valve 34 to control the opening degree of the heating throttle valve 34; the heating device 3 may further include a temperature sensor disposed on the heating body 32 to detect the real-time temperature of the heating body 32, and the control unit of the cooling capacity distribution unit 1 is also electrically connected to the temperature sensor to control the opening degrees of the heating throttle valve 34 and the second throttle valve 52 according to the detection result of the temperature sensor.

[0064] As Figure 1 shown, the number of the immersion heat exchangers 4 is multiple, and the multiple immersion heat exchangers 4 are arranged at intervals within the cabinet 2, and the number of the first cooling branch pipelines 11 is also multiple, and the multiple first cooling branch pipelines 11 are arranged in one-to-one correspondence with the multiple immersion heat exchangers 4; and / or the number of the heating devices 3 is multiple, and the multiple heating devices 3 are arranged at intervals within the cabinet 2, and the number of the second cooling branch pipelines 12 is also multiple, and the multiple second cooling branch pipelines 12 are arranged in one-to-one correspondence with the multiple heating devices 3.

[0065] By providing multiple immersion heat exchangers 4, multiple first cooling branch pipelines 11, multiple heating devices 3 and multiple second cooling branch pipelines 12 in this application, independent cooling of different immersion heat exchangers 4 and different heating devices 3 within the cabinet 2 is achieved, the heat dissipation capacity and flexibility of the equipment liquid cooling system are improved, the equipment liquid cooling system can more effectively handle the heat dissipation requirements of the equipment within the cabinet, the cooling efficiency is improved, the energy consumption is reduced at the same time, and the operation stability and efficiency of the equipment liquid cooling system are improved.

[0066] Specifically, the multiple immersion heat exchangers 4 include a first immersion heat exchanger 41 and a second immersion heat exchanger 42, and the first immersion heat exchanger 41 and the second immersion heat exchanger 42 are respectively located on opposite sides of the multiple heating devices 3.

[0067] Optionally, the two-phase liquid cooling working medium includes one of R134a, R513A, R515B, R471A, 1233zd, R1234yf; the single-phase liquid cooling working medium includes a low-viscosity non-conductive fluorinated liquid with a boiling point above 110°C, such as FC40, etc.

[0068] By selecting a suitable liquid cooling working medium, this application can meet the heat dissipation requirements of different devices and the operating conditions of the device liquid cooling system, transfer heat more effectively, reduce the temperature of the device, improve the performance and lifespan of the device liquid cooling system, ensure the safety and reliability of the device liquid cooling system, improve the stability and efficiency of device operation, reduce environmental impact, and improve energy utilization efficiency.

[0069] R134a, also known as 1,1,1,2-tetrafluoroethane, is a colorless, odorless, non-toxic gas with the chemical formula CH2FCF3. It is a commonly used environmentally friendly refrigerant, gaseous at normal temperature and pressure, with a low boiling point, easy to volatilize, non-flammable at normal temperature and pressure, low toxicity to humans and animals, chemically stable under normal use conditions, with an ozone depletion potential (ODP) of 0, not damaging the ozone layer, and is used to replace the ozone-damaging R12 refrigerant.

[0070] R513A, a hydrofluoroolefin (HFO) refrigerant, with the chemical name 1,3,3,3-tetrafluoro-2-(trifluoromethyl)-1-propene, also known as HFO-1336mzz. It is an environmentally friendly refrigerant that does not damage the ozone layer, is harmless to the ozone layer, can provide good refrigeration effect, has low toxicity, high use safety, and little impact on the environment, and is mainly used to replace traditional hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) refrigerants a.

[0071] R515B, a hydrofluoroolefin (HFO) refrigerant, with the chemical name 1,1,1,3,3,3-hexafluoropropene, also known as HFO-1234yf. It is an environmentally friendly refrigerant that does not damage the ozone layer, is harmless to the ozone layer, can provide good refrigeration effect, has low toxicity, high use safety, and little impact on the environment, and is mainly used to replace traditional hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) refrigerants.

[0072] R471A, a mixed refrigerant, is usually composed of various hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs). It does not damage the ozone layer, is harmless to the ozone layer, can provide good refrigeration effect, and is used to replace traditional refrigerants such as R22 and R404A. It is designed as a refrigerant with a low global warming potential (GWP), and at the same time has good thermal efficiency and environmental performance.

[0073] 1233zd, an HFO (hydrofluoroolefin) refrigerant, with the chemical name of 1-chloro-3,3,3-trifluoropropene, also known as HFO-1233zd, is an environmentally friendly refrigerant. It is gaseous at normal temperature and pressure, has a low boiling point, is easy to volatilize, has low toxicity to humans and animals, has low flammability, and needs to be used under specific safety conditions. It is chemically stable under normal use conditions and is mainly used to replace traditional hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) refrigerants.

[0074] R1234yf, an HFO hydrofluoroolefin refrigerant, with the chemical name of 1,1,1,2,3,3,3-heptafluoropropane, also known as HFO-1234yf, is an environmentally friendly refrigerant. It is gaseous at normal temperature and pressure, has a low boiling point, is easy to volatilize, has low toxicity to humans and animals, has low flammability, and needs to be used under specific safety conditions. It is chemically stable under normal use conditions and is mainly used to replace traditional hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) refrigerants.

[0075] FC40, namely fluorinated hydrocarbon refrigerant, the chemical composition of FC40 is mainly tetrafluoropropane (C3H2F4). It is a commonly used single-phase immersion liquid cooling working medium. It is a non-conductive and non-flammable liquid based on hydrocarbon fluorides, mainly used for the cooling of data centers, servers and other high-performance computing devices. It has good thermal conductivity and chemical stability, can maintain its liquid state within a wide temperature range, is suitable for use in closed liquid cooling systems, and can effectively take away the heat generated by electronic devices.

[0076] These above-mentioned refrigerants are selected as the working medium in the liquid cooling system of the equipment in this application according to their chemical characteristics, environmental performance, thermodynamic properties, etc. In liquid cooling technology, especially in the high-efficiency cooling system of data centers, these refrigerants are valued and used because of their specific properties.

[0077] For example, the high latent heat of R134a allows it to absorb heat more efficiently in a two-phase cooling system, but at the same time, due to its high GWP, its impact on the environment needs to be considered in long-term use. In contrast, refrigerants such as R513A, R515B, R471A, 1233zd and R1234yf are gradually becoming alternatives due to their lower environmental impact (such as GWP value). These factors need to be comprehensively considered when designing a liquid cooling system and selecting a refrigerant.

[0078] The working process of the equipment liquid cooling system of this application is as follows:

[0079] During operation, the heat generating device 3 is immersed in a cabinet 2 filled with a single-phase liquid-cooling medium. Various low-power devices (such as hard disks, memory, boards, etc.) in the cabinet 2 and the heat generating device 3 are also directly in contact with the single-phase liquid-cooling medium. After the single-phase liquid-cooling medium is heated, it moves upward under the action of buoyancy, and the temperature of the single-phase liquid-cooling medium on both sides of the cabinet 2 decreases after contacting the corresponding immersion heat exchanger 4, and the low-temperature single-phase liquid-cooling medium moves downward accordingly, thereby forming a cycle. Therefore, the single-phase liquid-cooling medium can automatically circulate back and forth in the cabinet 2 without a separate circulation pump.

[0080] At the same time, after the two-phase liquid cooling medium passes through the flow distribution of the corresponding throttle valve 5 in each cooling branch pipeline, it flows through the immersion heat exchanger 4 or the heating cooling pipeline 33 of the heating equipment, and in this process, the two-phase liquid cooling medium evaporates from liquid to gas to take away a large amount of heat from the single-phase liquid cooling medium and the heating body 32. The gas-liquid mixture of the two-phase liquid cooling medium after the phase change is collected through the pipeline and refluxed to the first pipeline of the cooling distribution unit 1, and exchanges heat with the machine room cold water flowing through the second pipeline (flowing into the second pipeline from the external liquid supply pipeline 8 and flowing out of the second pipeline from the return liquid pipeline 9) in the liquid-liquid heat exchanger of the cooling distribution unit 1, so as to cool down and condense into liquid and then flow to the liquid collector of the cooling distribution unit 1, and then continue to be pumped to each cooling branch pipeline through the circulation pump 7 to start the next round of heat dissipation cycle.

[0081] The above is a detailed introduction to a liquid cooling system for equipment provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A device liquid cooling system, characterized in that, Comprising: A cold quantity distribution unit (1), including a liquid-liquid heat exchanger, the liquid-liquid heat exchanger including a first pipeline and a second pipeline arranged in parallel for heat exchange, the first pipeline being filled with a two-phase liquid cooling working medium, and both ends of the second pipeline being respectively connected to an external liquid supply pipeline (8) and a liquid return pipeline (9); A plurality of cooling branch pipelines, the plurality of cooling branch pipelines being arranged in parallel, and both ends of each of the plurality of cooling branch pipelines being respectively connected to both ends of the first pipeline; the plurality of cooling branch pipelines including a first cooling branch pipeline (11) and a second cooling branch pipeline (12); A cabinet (2), the cabinet (2) being filled with a single-phase liquid cooling working medium, and an immersion heat exchanger (4) and a heat generating device (3) being spaced apart in the cabinet (2), the immersion heat exchanger (4) being arranged on the first cooling branch pipeline (11) so that the two-phase liquid cooling working medium exchanges heat with the single-phase liquid cooling working medium, and a heat generating and cooling pipeline (33) of the heat generating device (3) being arranged on the second cooling branch pipeline (12).

2. The device liquid cooling system according to claim 1, wherein The equipment liquid cooling system includes a circulation pump (7), an inlet of the circulation pump (7) being connected to an outlet of the first pipeline, and an outlet of the circulation pump (7) being connected to inlets of each of the plurality of cooling branch pipelines.

3. The device liquid cooling system according to claim 1, characterized in that, The equipment liquid cooling system includes a plurality of throttle valves (5), the plurality of throttle valves (5) being respectively arranged at inlets of the plurality of cooling branch pipelines.

4. The device liquid cooling system according to claim 3, wherein The plurality of throttle valves (5) includes a first throttle valve (51) and a second throttle valve (52), the first throttle valve (51) being arranged at an inlet of the first cooling branch pipeline (11), and the second throttle valve (52) being arranged at an inlet of the second cooling branch pipeline (12).

5. The device liquid cooling system according to claim 4, wherein, The equipment liquid cooling system further includes a temperature detection component (6), the temperature detection component (6) being arranged in the cabinet (2), the cold quantity distribution unit (1) being electrically connected to both the temperature detection component (6) and the first throttle valve (51), the temperature detection component (6) being used to detect a real-time temperature of the single-phase liquid cooling working medium, and the cold quantity distribution unit (1) being used to receive a detection result of the temperature detection component (6) and adjust an opening degree of the first throttle valve (51) according to the detection result.

6. The device liquid cooling system according to claim 1, wherein The cold quantity distribution unit (1) further includes a control unit, a filter, a liquid collector, and a cold quantity distribution control valve, the control unit being electrically connected to the cold quantity distribution control valve, and the cold quantity distribution control valve, the filter, and the liquid collector being sequentially arranged at an outlet of the first pipeline in a direction away from the first pipeline; The equipment liquid cooling system includes: A circulation pump (7), an inlet of the circulation pump (7) being connected to an outlet of the first pipeline, an outlet of the circulation pump (7) being connected to inlets of each of the plurality of cooling branch pipelines, and the circulation pump (7) being located on a side of the liquid collector away from the filter; A plurality of throttle valves (5), the plurality of throttle valves (5) being respectively arranged at inlets of the plurality of cooling branch pipelines.

7. The equipment liquid cooling system according to claim 1, wherein the first cooling branch pipeline (11) includes a first liquid supply section (111) and a first liquid return section (112), an inlet of the first liquid supply section (111) is connected to an outlet of the first pipeline, and an outlet of the first liquid return section (112) is connected to an inlet of the first pipeline; the immersion heat exchanger (4) includes heat exchange tubes and a plurality of fins arranged at intervals on the heat exchange tubes, and two ends of the heat exchange tubes are respectively connected to an outlet of the first liquid supply section (111) and an inlet of the first liquid return section (112).

8. The equipment liquid cooling system according to claim 1, wherein the second cooling branch pipeline (12) includes a second liquid supply section (121) and a second liquid return section (122), an inlet of the second liquid supply section (121) is connected to an outlet of the first pipeline, and an outlet of the second liquid return section (122) is connected to an inlet of the first pipeline; the heating device (3) includes a heating main body (32), the heating cooling pipeline (33) is in contact with the heating main body (32) to receive heat emitted by the heating main body (32), and two ends of the heating cooling pipeline (33) are respectively connected to an outlet of the second liquid supply section (121) and an inlet of the second liquid return section (122).

9. The device liquid cooling system according to claim 8, wherein The heating device (3) further includes: a heating throttle valve (34), the heating throttle valve (34) is arranged at an inlet of the heating cooling pipeline (33); and / or a housing (31), the heating main body (32) and a part of the heating cooling pipeline (33) are arranged inside the housing (31).

10. The equipment liquid cooling system according to claim 1, wherein the number of the immersion heat exchangers (4) is multiple, the multiple immersion heat exchangers (4) are arranged at intervals inside the cabinet (2), and the number of the first cooling branch pipelines (11) is also multiple, and the multiple first cooling branch pipelines (11) are arranged in one-to-one correspondence with the multiple immersion heat exchangers (4); and / or the number of the heating devices (3) is multiple, the multiple heating devices (3) are arranged at intervals inside the cabinet (2), and the number of the second cooling branch pipelines (12) is also multiple, and the multiple second cooling branch pipelines (12) are arranged in one-to-one correspondence with the multiple heating devices (3).

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