Cooling system and data center

Abstract

The utility model provides a cooling system and a data center, and belongs to the technical field of cooling systems. A cooling tower module in the cooling system is located outdoors, and an air wall module and a cold plate module are located indoors. An outlet of the outdoor heat exchanger is connected with an inlet of the refrigerant pump, an outlet of the refrigerant pump is connected to an inlet of the first heat exchange channel of the condenser and an inlet of the indoor heat exchanger, and an outlet of the first heat exchange channel and an outlet of the indoor heat exchanger are connected with an inlet of the outdoor heat exchanger. An outlet of the compressor is connected with an inlet of a second heat exchange channel of the condenser, an outlet of the second heat exchange channel is connected with an inlet of the first expansion valve, an outlet of the first expansion valve is connected with an inlet of the evaporator, and an outlet of the evaporator is connected with an inlet of the compressor. The indoor heat exchanger and the evaporator are arranged on one side of the indoor fan in parallel; at least one liquid cooling plate is connected between the refrigerant pump and the outdoor heat exchanger. The cooling system is small in occupied area and can be rapidly deployed on site.

Description

Technical Field

[0001] This application relates to the technical field of cooling systems, and particularly to a cooling system and a data center. Background Art

[0002] The cooling energy consumption accounts for about 40% of the total energy consumption in a data center. Reducing the cooling energy consumption can effectively reduce the total energy consumption of the data center.

[0003] In the cooling system of a data center, cold plate liquid cooling has high cooling efficiency and moderate cost, and is currently the most widely used cooling method. Since cold plate liquid cooling cannot be compatible with all heat-generating components in the server, air cooling needs to be used as a supplement.

[0004] However, in the related art, the cooling system adopting the cold plate liquid cooling scheme needs to match components such as a chilled water host and a condenser for the air cooling module, resulting in an increase in the cost of the cooling system and also an increase in the floor area. Utility Model Content

[0005] This application provides a cooling system and a data center, which can solve the problem that the cooling system adopting the cold plate liquid cooling scheme needs to match components such as a chilled water host and a condenser for the air cooling module, resulting in an increase in the cost of the cooling system and an increase in the floor area.

[0006] The technical solution is as follows:

[0007] On the one hand, a cooling system is provided. The cooling system includes: a cooling tower module, a wind wall module, and a cold plate module;

[0008] The cooling tower module is located outdoors, and the wind wall module and the cold plate module are located indoors;

[0009] The cooling tower module includes an outdoor heat exchanger, an outdoor fan, and a refrigerant pump;

[0010] The wind wall module includes a compressor, a condenser, an evaporator, a first expansion valve, an indoor heat exchanger, and an indoor fan;

[0011] The cold plate module includes at least one liquid cooling plate;

[0012] The outlet of the outdoor heat exchanger is connected to the inlet of the refrigerant pump, the outlet of the refrigerant pump is respectively connected to the inlet of the first heat exchange channel of the condenser and the inlet of the indoor heat exchanger, and the outlet of the first heat exchange channel and the outlet of the indoor heat exchanger are respectively connected to the inlet of the outdoor heat exchanger;

[0013] The outlet of the compressor is connected to the inlet of the second heat exchange channel of the condenser, the outlet of the second heat exchange channel is connected to the inlet of the first expansion valve, the outlet of the first expansion valve is connected to the inlet of the evaporator, and the outlet of the evaporator is connected to the inlet of the compressor; the outdoor fan is located on one side of the outdoor heat exchanger; the indoor heat exchanger and the evaporator are arranged side by side on one side of the indoor fan;

[0014] The inlet of the at least one liquid cooling plate is connected to the outlet of the refrigerant pump, and the outlet of the at least one liquid cooling plate is connected to the inlet of the outdoor heat exchanger.

[0015] On the other hand, a data center is provided, and the data center includes the cooling system described in this application.

[0016] The beneficial effects brought by the technical solution provided in this application at least include:

[0017] The cooling system of this application includes a cooling tower module, a wind wall module, and a cold plate module. The cooling tower module includes an outdoor heat exchanger, an outdoor fan, and a refrigerant pump, and is placed outdoors. The wind wall module includes a compressor, a condenser, an evaporator, a first expansion valve, an indoor heat exchanger, and an indoor fan, and is placed indoors. The natural cold source and the compressor cold source are respectively designed in an integrated manner. The former is arranged outdoors, and the latter is designed in an integrated manner with the wind wall. There is no distinction between a separate air-cooled cold source and a liquid-cooled cold source. The floor area of the system is small, and on-site rapid deployment can be achieved. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of the cooling system provided by the embodiment of this application;

[0020] Figure 2 is a schematic structural diagram of the cooling system provided by the embodiment of this application;

[0021] Figure 3 is a schematic structural diagram of the cooling system provided by the embodiment of this application;

[0022] Figure 4 is a schematic structural diagram of the cooling system provided by the embodiment of this application.

[0023] The reference numerals in the drawings are respectively represented as:

[0024] 1. Cooling tower module;

[0025] 11. Outdoor heat exchanger; 111. Evaporative cooler; 112. Dry cooler; 12. Outdoor fan; 13. Refrigerant pump; 14. Housing; 131. Air passage; 15. Spraying assembly; 151. Nozzle; 152. Liquid collecting tank; 153. Spraying pump; 16. Cooling filler;

[0026] 2. Wind wall module;

[0027] 21. Compressor; 22. Condenser; 221. First heat exchange channel; 222. Second heat exchange channel; 23. Evaporator; 24. First expansion valve; 25. Indoor heat exchanger; 26. Indoor fan; 27. Second expansion valve; 28. Third expansion valve; 29. Fourth expansion valve; 210. Control valve;

[0028] 3. Cold plate module;

[0029] 31. Liquid cooling plate; 32. Fifth expansion valve; 33. Cooling capacity distribution module; 34. Circulation pump. Detailed implementation manners

[0030] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present application. On the contrary, they are only examples of the devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0031] In the description of the present application, it should be understood that 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. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are 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 thus should not be construed as a limitation to the present application.

[0032] To make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0033] On the one hand, in combination with Figure 1 and Figure 3As shown in the figure, this embodiment provides a cooling system, which includes: a cooling tower module 1, a wind wall module 2, and a cold plate module 3. The cooling tower module 1 is located outdoors, and the wind wall module 2 and the cold plate module 3 are located indoors.

[0034] The cooling tower module 1 includes an outdoor heat exchanger 11, an outdoor fan 12, and a refrigerant pump 13; the wind wall module 2 includes a compressor 21, a condenser 22, an evaporator 23, a first expansion valve 24, an indoor heat exchanger 25, and an indoor fan 26; the cold plate module 3 includes at least one liquid cooling plate 31.

[0035] The outlet of the outdoor heat exchanger 11 is connected to the inlet of the refrigerant pump 13, and the outlet of the refrigerant pump 13 is respectively connected to the inlet of the first heat exchange channel 221 of the condenser 22 and the inlet of the indoor heat exchanger 25. The outlet of the first heat exchange channel 221 and the outlet of the indoor heat exchanger 25 are respectively connected to the inlet of the outdoor heat exchanger 11.

[0036] The outlet of the compressor 21 is connected to the inlet of the second heat exchange channel 222 of the condenser 22. The outlet of the second heat exchange channel 222 is connected to the inlet of the first expansion valve 24. The outlet of the first expansion valve 24 is connected to the inlet of the evaporator 23. The outlet of the evaporator 23 is connected to the inlet of the compressor 21; the outdoor fan 12 is located on one side of the outdoor heat exchanger 11; the indoor heat exchanger 25 and the evaporator 23 are arranged in parallel on one side of the indoor fan 26.

[0037] The inlet of at least one liquid cooling plate 31 is connected to the outlet of the refrigerant pump 13, and the outlet of at least one liquid cooling plate 31 is connected to the inlet of the outdoor heat exchanger 11.

[0038] The cooling system of this embodiment includes a cooling tower module 1, a wind wall module 2, and a cold plate module 3. The cooling tower module 1 includes an outdoor heat exchanger 11, an outdoor fan 12, and a refrigerant pump 13 and is placed outdoors. The wind wall module 2 includes a compressor 21, a condenser 22, an evaporator 23, a first expansion valve 24, an indoor heat exchanger 25, and an indoor fan 26 and is placed indoors. The natural cold source and the compressor 21 cold source are respectively designed in an integrated manner. The former is arranged outdoors, and the latter is designed in an integrated manner with the wind wall. There is no distinction between a separate air-cooled cold source and a liquid-cooled cold source. The floor area of the system is relatively small, and on-site rapid deployment can be achieved. It should be noted that the compressor 21 can also be arranged outdoors, so as to reduce the space occupation ratio of the wind wall module 2 indoors.

[0039] In this embodiment, the number of indoor fans 26 in the air wall module 2 is multiple. The multiple indoor fans 26 are stacked or installed in rows to achieve large-displacement horizontal air supply, so it is called an air wall. Stacking multiple indoor fans 26 can make the best use of the geographical space, resulting in more excellent air flow distribution, ensuring more uniform air flow through the air-cooled terminal, and thus improving the heat transfer performance. After a certain fan fails, the remaining fans will compensate for the air volume, so the redundancy function improves the operation reliability of the entire system.

[0040] In the cooling system of this embodiment, the air wall module 2 and the cold plate module 3 can receive the cooling capacity of the same cooling tower module 1, so that the cooling system can adjust the air-liquid ratio. When it is necessary to increase the proportion of air cooling, the total amount of refrigerant supplied by the cooling tower module 1 to the air wall module 2 can be increased, and the total amount of refrigerant supplied by the cooling tower module 1 to the cold plate module 3 can be reduced. Correspondingly, when it is necessary to increase the proportion of liquid cooling, the total amount of refrigerant supplied by the cooling tower module 1 to the cold plate module 3 can be increased, and the total amount of refrigerant supplied by the cooling tower module 1 to the air wall module 2 can be reduced.

[0041] Among them, the increase or decrease in the total amount of refrigerant supplied by the cooling tower module 1 can be achieved by adjusting the opening degree of the control valve between the two modules and the cooling tower module 1, or by increasing or decreasing the number of modules participating in the cycle in the system.

[0042] In some possible implementation manners, the liquid cooling plate 31 in the cold plate module 3 can be a metal block made of copper, nickel or aluminum, with a circulating flow channel inside, and a cooling medium circulates in the circulating flow channel.

[0043] The liquid cooling plate 31 can be respectively attached to and in contact with heat-generating chips such as a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit), absorb the heat of the CPU and GPU, and achieve temperature cooling.

[0044] Exemplarily, the number of liquid cooling plates 31, for example, is one, two, three, etc. The number of liquid cooling plates 31 can be reasonably selected according to the number of heat-generating components. Each liquid cooling plate 31 is respectively in contact with different heat-generating components to cool them down.

[0045] It should be noted that the "connection" of two components in this application not only includes the combination of the two components in contact with each other, but also includes connecting two non-contact components through a sealed pipeline, enabling the liquid in the fluid of one component to enter the other component along the sealed pipeline.

[0046] Combined Figure 1 and Figure 3As shown, in some embodiments, a second expansion valve 27 is provided on the pipeline between the outlet of the refrigerant pump 13 and the inlet of the first heat exchange channel 221 of the condenser 22; a third expansion valve 28 is provided on the pipeline between the outlet of the refrigerant pump 13 and the inlet of the indoor heat exchanger 25.

[0047] Through the above arrangement, by controlling the second expansion valve 27, the on-off state and the flow rate between the outlet of the refrigerant pump 13 and the inlet of the first heat exchange channel 221 can be adjusted, and by controlling the third expansion valve 28, the on-off state and the flow rate between the outlet of the refrigerant pump 13 and the inlet of the indoor heat exchanger 25 can be adjusted.

[0048] In some embodiments, the cooling system includes a compressor mode, a hybrid refrigeration mode, and a free cooling mode.

[0049] In the compressor mode, the first expansion valve 24 and the second expansion valve 27 are both opened, the third expansion valve 28 is closed, the compressor 21 is started, the refrigerant pump 13 is started, and the indoor fan 26 and the outdoor fan 12 are operated.

[0050] At this time, the outdoor wet bulb temperature is relatively high, and the refrigerant temperature provided by the cooling tower module 1 is also relatively high, and the refrigerant has lost the ability to cool the indoor return air. At this time, the outdoor fan 12 of the cooling tower module 1 is opened, the air wall module 2 is operated, the third expansion valve 28 is in the closed state, and the second expansion valve 27 is adjusted according to the condensation pressure. The first path of refrigerant supplied by the refrigerant pump 13 in the cooling tower module 1 does not pass through the indoor heat exchanger 25, and the second path of refrigerant enters the condenser 22 after throttling by the second expansion valve 27 to cool the high-temperature and high-pressure refrigerant output by the compressor 21. After being heated, the second path of refrigerant returns to the return air main pipe of the cooling tower module 1 (i.e., the inlet of the outdoor heat exchanger 11). The third path of refrigerant coming out of the refrigerant pump 13 enters the cold plate module 3, absorbs heat through the liquid cooling plate 31 and then returns to the return air main pipe of the cooling tower module 1. The usual adjustment method of the refrigerant pump 13 is to ensure that the pressure difference between the inlet and outlet main pipes of the cooling tower module 1 remains unchanged. At this time, the indoor heat exchanger 25 does not work, and the air-side cooling capacity is provided by the compressor 21.

[0051] In the hybrid refrigeration mode, the first expansion valve 24, the second expansion valve 27, and the third expansion valve 28 are all opened, the compressor 21 is started, the refrigerant pump 13 is started, and the indoor fan 26 and the outdoor fan 12 are operated.

[0052] At this time, the outdoor wet-bulb temperature is moderate, and the refrigerant temperature of the cooling tower module 1 also decreases. The refrigerant can cool the indoor return air. At this time, the outdoor fan 12 of the cooling tower module 1 is turned on, the compressor 21 operates, the third expansion valve 28 is in an adjustment state to provide as much cooling capacity of the indoor heat exchanger 25 as possible, and the second expansion valve 27 is adjusted according to the condensation pressure. The first path of refrigerant supplied by the refrigerant pump 13 passes through the indoor heat exchanger 25 to pre-cool the high-temperature return air, and then returns to the suction header of the cooling tower module 1 (i.e., the inlet of the outdoor heat exchanger 11); the second path of refrigerant enters the condenser 22 after throttling through the second expansion valve 27 to cool the high-temperature and high-pressure refrigerant output by the compressor 21, and the refrigerant itself is heated and then returns to the suction header of the cooling tower module 1 again; the third path of refrigerant from the refrigerant pump 13 enters the cold plate module 3, absorbs heat through the liquid cooling plate 31 and then returns to the suction header of the cooling tower module 1 again. At this time, the indoor high-temperature return air is first pre-cooled by the indoor heat exchanger 25, then cooled a second time by the evaporator 23, the temperature decreases, and then is sent to the computer room by the indoor fan 26. The indoor heat exchanger 25 and the evaporator 23 work simultaneously, and the air-side cooling capacity is provided by the cooling tower module 1 and the compressor 21.

[0053] In the free-cooling mode, the third expansion valve 28 is opened, the second expansion valve 27 and the first expansion valve 24 are both closed, the compressor 21 stops operating, the refrigerant pump 13 starts, and the indoor fan 26 and the outdoor fan 12 operate.

[0054] At this time, either the outdoor wet-bulb temperature or the outdoor dry-bulb temperature is relatively low. The liquid supply temperature of the cooling tower module 1 is also relatively low, and the air wall can meet the cooling capacity requirements of the whole machine only by the cooling capacity provided by the indoor heat exchanger 25. The outdoor fan 12 is turned on, the compressor 21 does not work, the third expansion valve 28 is in an adjustment state, and the second expansion valve 27 and the first expansion valve 24 are both in a closed state. The first path of refrigerant supplied by the refrigerant pump 13 passes through the indoor heat exchanger 25 to cool the high-temperature return air, and then returns to the suction header of the cooling tower module 1; the second path of refrigerant does not pass through the second expansion valve 27; the third path of refrigerant from the refrigerant pump 13 enters the cold plate module 3, absorbs heat through the liquid cooling plate 31 and then returns to the suction header of the cooling tower module 1 again. At this time, the indoor high-temperature return air is cooled by the indoor heat exchanger 25 and then passes through the evaporator 23 (the evaporator 23 has no heat exchange), the temperature decreases, and then is sent indoors by the indoor fan 26. At this time, the compressor 21 system does not work, the evaporator 23 has no refrigeration capacity, and the air-side cooling capacity is provided only by the cooling tower module 1.

[0055] Combined with Figure 1 and Figure 3As shown, in some embodiments, a first refrigerant is filled in the first circulation loop formed by the outdoor heat exchanger 11, the refrigerant pump 13, the first heat exchange channel 221, and the indoor heat exchanger 25, and a second refrigerant is filled in the second circulation loop formed by the compressor 21, the second heat exchange channel 222, the first expansion valve 24, and the evaporator 23.

[0056] In this embodiment, the first circulation loop of the cooling tower module 1 uses a refrigerant with a low freezing point to replace water, enabling the whole machine to have excellent anti-freezing characteristics, which is beneficial to the deployment of the unit in cold regions; in addition, the use of the refrigerant enables the refrigerant in the cooling tower module 1, the air wall module 2, and the cold plate module 3 to all achieve phase change heat transfer, and the efficient phase change heat transfer characteristics are beneficial to reducing the heat exchange area of the heat exchanger and the pipe diameter of the pipeline.

[0057] In some embodiments, the first refrigerant and the second refrigerant are the same or different. When the first refrigerant and the second refrigerant are the same, the first circulation loop and the second circulation loop can be interconnected to achieve the complementarity of the natural cold source and the cold source of the compressor 21, which is more beneficial to improving the environmental adaptability of the cooling system.

[0058] Combined Figure 2 and Figure 4 As shown, in some embodiments, the air wall module 2 does not include the indoor heat exchanger 25; the outlet of the refrigerant pump 13 is respectively connected to the inlet of the first heat exchange channel 221 of the condenser 22 and the inlet of the evaporator 23, and the outlet of the evaporator 23 is connected to the inlet of the outdoor heat exchanger 11.

[0059] Through the above arrangement, the indoor heat exchanger 25 in the air wall module 2 is omitted, and the cooling tower module 1 and the compressor 21 share the evaporator 23 as a heat exchange component, which is beneficial to reducing the cost and volume of the air wall module 2, and the application scenarios of the air wall module 2 are more diverse.

[0060] Combined Figure 2 and Figure 4 As shown, in some embodiments, a second expansion valve 27 is provided on the pipeline between the outlet of the refrigerant pump 13 and the inlet of the first heat exchange channel 221 of the condenser 22.

[0061] A fourth expansion valve 29 is provided on the pipeline between the outlet of the refrigerant pump 13 and the inlet of the evaporator 23, and a control valve 210 is provided on the pipeline between the outlet of the evaporator 23 and the inlet of the outdoor heat exchanger 11.

[0062] Through the above arrangement, controlling the second expansion valve 27 can adjust the flow on-off state and flow rate between the outlet of the refrigerant pump 13 and the inlet of the first heat exchange channel 221 of the condenser 22, and by controlling the fourth expansion valve 29, the flow on-off state and flow rate between the outlet of the refrigerant pump 13 and the inlet of the evaporator 23 can be adjusted.

[0063] In some embodiments, the cooling system includes a compressor mode, a hybrid refrigeration mode, and a free cooling mode.

[0064] In the compressor mode, the first expansion valve 24 and the second expansion valve 27 are both opened, the fourth expansion valve 29 and the control valve 210 are both closed, the compressor 21 is started, the refrigerant pump 13 is started, and the indoor fan 26 and the outdoor fan 12 are operated.

[0065] At this time, the outdoor wet-bulb temperature is relatively high, and the refrigerant temperature provided by the cooling tower module 1 is also relatively high. The refrigerant has lost the ability to cool the indoor return air. At this time, the outdoor fan 12 is opened, the air wall module 2 is operated, the fourth expansion valve 29 is in a closed state, and the second expansion valve 27 is adjusted according to the condensation pressure. The first path of refrigerant supplied by the refrigerant pump 13 in the cooling tower module 1 does not pass through the evaporator 23, and the second path of refrigerant enters the condenser 22 after throttling by the second expansion valve 27 to cool the high-temperature and high-pressure refrigerant output by the compressor 21. After being heated, the second path of refrigerant returns to the return air main pipe of the cooling tower module 1 (i.e., the inlet of the outdoor heat exchanger 11). The third path of refrigerant from the refrigerant pump 13 enters the cold plate module 3, absorbs heat through the liquid cold plate 31, and then returns to the return air main pipe of the cooling tower module 1. The common adjustment method of the refrigerant pump 13 is to ensure that the pressure difference between the inlet and outlet main pipes of the cooling tower module 1 remains unchanged. The air-side cooling capacity is provided by the compressor 21.

[0066] In the hybrid refrigeration mode, the first expansion valve 24, the second expansion valve 27, the fourth expansion valve 29, and the control valve 210 are all opened, the compressor 21 is started, the refrigerant pump 13 is started, and the indoor fan 26 and the outdoor fan 12 are operated.

[0067] At this time, the outdoor wet-bulb temperature is moderate, and the refrigerant temperature of the cooling tower module 1 also decreases. The refrigerant can cool the indoor return air. At this time, the outdoor fan 12 of the cooling tower module 1 is turned on, the compressor 21 operates, the fourth expansion valve 29 is in an adjusted state, and the second expansion valve 27 is adjusted according to the condensation pressure. The first path of refrigerant supplied by the refrigerant pump 13 is mixed with the refrigerant output by the compressor 21 through the condenser 22 and the first expansion valve 24. The mixed refrigerant passes through the evaporator 23 to cool the high-temperature return air. Then, a part of the refrigerant returns to the return air main pipe of the cooling tower module 1 (i.e., the inlet of the outdoor heat exchanger 11) through the control valve 210, and another part of the refrigerant returns to the inlet of the compressor 21, is compressed by the compressor 21, and then flows to the condenser 22 to participate in the next cycle; the second path of refrigerant enters the condenser 22 after throttling by the second expansion valve 27 to cool the high-temperature and high-pressure refrigerant output by the compressor 21. After being heated, the refrigerant itself returns to the return air main pipe of the cooling tower module 1 again; the third path of refrigerant coming out of the refrigerant pump 13 enters the cold plate module 3, absorbs heat through the liquid cooling plate 31, and then returns to the return air main pipe of the cooling tower module 1 again. At this time, the indoor high-temperature return air is cooled by the evaporator 23, the temperature decreases, and then is sent to the computer room by the indoor fan 26. The evaporator 23 receives the cooling capacity of both the cooling tower module 1 and the compressor 21 at the same time, and the air-side cooling capacity is provided by the cooling tower module 1 and the compressor 21.

[0068] In the free cooling mode, both the fourth expansion valve 29 and the control valve 210 are opened, both the first expansion valve 24 and the second expansion valve 27 are closed, the compressor 21 stops running, the refrigerant pump 13 starts, and the indoor fan 26 and the outdoor fan 12 operate.

[0069] At this time, either the outdoor wet-bulb temperature or the outdoor dry-bulb temperature is relatively low. The liquid supply temperature of the cooling tower module 1 is also relatively low. The air wall can meet the cooling capacity requirements of the whole machine only by the cooling capacity provided by the evaporator 23. The outdoor fan 12 is turned on, the compressor 21 does not work, the fourth expansion valve 29 is in an adjusted state, and both the second expansion valve 27 and the first expansion valve 24 are in a closed state. The first path of refrigerant supplied by the refrigerant pump 13 passes through the evaporator 23 to cool the high-temperature return air, and then returns to the return air main pipe of the cooling tower module 1; the second path of refrigerant does not pass through the second expansion valve 27; the third path of refrigerant coming out of the refrigerant pump 13 enters the cold plate module 3, absorbs heat through the liquid cooling plate 31, and then returns to the return air main pipe of the cooling tower module 1 again. At this time, the indoor high-temperature return air is cooled by the evaporator 23, the temperature decreases, and then is sent indoors by the indoor fan 26. At this time, the compressor 21 system does not work, and the air-side cooling capacity is provided only by the cooling tower module 1.

[0070] Combined Figures 1 to 4 As shown, in some embodiments, the outdoor heat exchanger 11 includes an evaporative cooler 111 and a dry cooler 112, and the evaporative cooler 111 and the dry cooler 112 are connected in parallel or in series.

[0071] With the above arrangement, the cooling tower module 1 can use the evaporative cooler 111 and / or the dry cooler 112 to cool the refrigerant, and can reasonably select a suitable cooling method according to the outdoor environmental conditions, improving the environmental adaptability of the cooling system.

[0072] Combined Figures 1 to 4 As shown, in some embodiments, the cooling tower module 1 further includes a housing 14, a spray assembly 15 and a cooling filler 16. The outdoor heat exchanger 11, the outdoor fan 12, the refrigerant pump 13, the spray assembly 15 and the cooling filler 16 are all located inside the housing 14.

[0073] The spray assembly 15 includes a nozzle 151, a liquid collecting tank 152 and a spray pump 153.

[0074] The evaporative cooler 111 is located above the cooling filler 16, a liquid collecting tank 152 is arranged below the cooling filler 16, the nozzle 151 sprays the coolant towards the evaporative cooler 111, and the coolant evaporates and absorbs heat on the surface of the evaporative cooler 111 and inside the cooling filler 16 respectively. The remaining coolant is collected in the liquid collecting tank 152, and the spray pump 153 is connected between the liquid collecting tank 152 and the nozzle 151.

[0075] An air passage 141 is also provided inside the housing 14. The cooling filler 16, the dry cooler 112 and the outdoor fan 12 are arranged in the air passage 141 in sequence, and the outdoor air flows through the cooling filler 16, the dry cooler 112 and the outdoor fan 12 in sequence.

[0076] The cooling system of this embodiment utilizes the evaporative cooling principle. The spray assembly 15 can use the nozzle 151 to spray the coolant towards the evaporative cooler 111, and the coolant evaporates and absorbs heat on the surface of the evaporative cooler 111, reducing the condensation pressure and temperature of the refrigerant inside the evaporative cooler 111. Some of the sprayed coolant will drip onto the cooling filler 16, further evaporating and absorbing heat to reduce the coolant temperature, and finally collecting in the liquid collecting tank 152. Using the spray pump 153 to supply this part of the coolant back to the nozzle 151 can realize the recycling of the coolant.

[0077] The dry cooler 112 can rely on its own heat exchange with air to independently cool and lower the temperature of the refrigerant when the outdoor temperature is relatively low (such as in winter), or can work together with the evaporative cooler 111 to cool and lower the temperature of the refrigerant together when the outdoor temperature is moderate (such as in the transitional season).

[0078] In some possible implementation manners, the spray pump 153 is controlled according to the outdoor ambient temperature. It is turned off when the outdoor dry-bulb temperature is lower than 10°C. At this time, the evaporative cooler 111 exchanges heat with the surrounding air respectively. It is turned on when the temperature is higher than 10°C to perform evaporative cooling on the evaporative cooler 111 respectively, thereby improving the utilization efficiency of the spray assembly 15 and taking into account the cooling demand and energy consumption.

[0079] Among them, the nozzle 151 may also be referred to as a sprinkler head, a sprayer, etc.

[0080] Combined with Figures 1 to 4 As shown, in some embodiments, a fifth expansion valve 32 is provided on the pipeline between the inlet of at least one liquid cooling plate 31 and the outlet of the refrigerant pump 13. Controlling the fifth expansion valve 32 can adjust the flow on-off state and the flow rate between the outlet of the refrigerant pump 13 and the inlet of the liquid cooling plate 31.

[0081] Combined with Figure 3 and Figure 4 As shown, in some embodiments, the cold plate module 3 further includes a cold quantity distribution module 33; the refrigerant inlet of the cold quantity distribution module 33 is connected to the outlet of the refrigerant pump 13, and the refrigerant outlet of the cold quantity distribution module 33 is connected to the inlet of the outdoor heat exchanger 11; the outlet of the cold quantity distribution module 33 is connected to the inlet of at least one liquid cooling plate 31, and the inlet of the cold quantity distribution module 33 is connected to the outlet of at least one liquid cooling plate 31. Among them, the cold quantity distribution module 33 can also be referred to as a Coolant Distribution Unit (CDU).

[0082] Through the above arrangement, the cold plate module 3 can realize the cold quantity distribution of the liquid cooling plate 31, and at the same time provide cold quantity to multiple liquid cooling plates 31 to meet the cooling requirements of different heating elements.

[0083] In some possible implementation manners, water can be used for cold quantity circulation in the circulation loop formed by the cold quantity distribution module 33 and the liquid cooling plate 31, or refrigerant, coolant, etc. can be used for cold quantity circulation.

[0084] Combined with Figure 3 and Figure 4 As shown, in some embodiments, a fifth expansion valve 32 is provided on the pipeline between the refrigerant inlet of the cold quantity distribution module 33 and the outlet of the refrigerant pump 13; a circulation pump 34 is provided on the pipeline between the outlet of the cold quantity distribution module 33 and the inlet of at least one liquid cooling plate 31.

[0085] Through the above arrangement, controlling the fifth expansion valve 32 can adjust the flow on-off state and the flow rate between the outlet of the refrigerant pump 13 and the cold quantity distribution module 33, and controlling the circulation pump 34 can adjust the flow on-off state and the flow rate between the cold quantity distribution module 33 and the liquid cooling plate 31.

[0086] On the other hand, this embodiment provides a data center, which includes the cooling system of the present application.

[0087] The data center of this embodiment adopts the cooling system of the present application and has all the beneficial technical effects of all embodiments herein.

[0088] In some possible implementation manners, the number of cooling systems adopted by the data center can be one or multiple. When multiple cooling systems are adopted, the liquid cooling plates in the data center are in a ring network form, and multiple cooling systems are connected to the liquid cooling ring network in a parallel form. The air-side end uses a water-cooled air wall, and the cooling system and the air wall are in a one-to-many form. Each cooling system corresponds to a certain number of air walls, reducing the air-side fault granularity and improving the reliability of the system.

[0089] In some other possible implementation manners, the data center further includes at least one server.

[0090] The server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers. It can also be a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN (Content Delivery Network), and big data and artificial intelligence platforms. The terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, etc., but is not limited thereto. The terminal and the server can be directly or indirectly connected through wired or wireless communication methods, and the present disclosure does not limit this.

[0091] It should be noted that, as used herein, "a plurality of" and "at least one" mean one or more, and "multiple" and "at least two" mean two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0092] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, unless otherwise specifically defined.

[0093] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application.

[0094] The above are only examples of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included within the protection scope of the present application.

Claims

1. A cooling system, characterized in that: The cooling system comprises: a cooling tower module (1), a wind wall module (2) and a cold plate module (3); The cooling tower module (1) is located outdoors, and the wind wall module (2) and the cold plate module (3) are located indoors; The cooling tower module (1) comprises an outdoor heat exchanger (11), an outdoor fan (12) and a refrigerant pump (13); The wind wall module (2) comprises a compressor (21), a condenser (22), an evaporator (23), a first expansion valve (24), an indoor heat exchanger (25) and an indoor fan (26); The cold plate module (3) comprises at least one liquid cooling plate (31); The outlet of the outdoor heat exchanger (11) is connected to the inlet of the refrigerant pump (13), the outlet of the refrigerant pump (13) is respectively connected to the inlet of the first heat exchange channel (221) of the condenser (22) and the inlet of the indoor heat exchanger (25), and the outlet of the first heat exchange channel (221) and the outlet of the indoor heat exchanger (25) are respectively connected to the inlet of the outdoor heat exchanger (11); The outlet of the compressor (21) is connected to the inlet of the second heat exchange channel (222) of the condenser (22), the outlet of the second heat exchange channel (222) is connected to the inlet of the first expansion valve (24), the outlet of the first expansion valve (24) is connected to the inlet of the evaporator (23), and the outlet of the evaporator (23) is connected to the inlet of the compressor (21); the outdoor fan (12) is located on one side of the outdoor heat exchanger (11); the indoor heat exchanger (25) and the evaporator (23) are arranged in parallel on one side of the indoor fan (26); The inlet of the at least one liquid cooling plate (31) is connected to the outlet of the refrigerant pump (13), and the outlet of the at least one liquid cooling plate (31) is connected to the inlet of the outdoor heat exchanger (11).

2. The cooling system according to claim 1, characterized in that: A second expansion valve (27) is provided on the pipeline between the outlet of the refrigerant pump (13) and the inlet of the first heat exchange channel (221); A third expansion valve (28) is provided on the pipeline between the outlet of the refrigerant pump (13) and the inlet of the indoor heat exchanger (25).

3. The cooling system according to claim 2, characterized in that: The cooling system includes a compressor mode, a hybrid cooling mode and a natural cooling mode; In the compressor mode, the first expansion valve (24) and the second expansion valve (27) are both opened, the third expansion valve (28) is closed, the compressor (21) is started, the refrigerant pump (13) is started, and the indoor fan (26) and the outdoor fan (12) are running; In the mixed cooling mode, the first expansion valve (24), the second expansion valve (27) and the third expansion valve (28) are all opened, the compressor (21) is started, the refrigerant pump (13) is started, and the indoor fan (26) and the outdoor fan (12) are running; In the natural cooling mode, the third expansion valve (28) is opened, the second expansion valve (27) and the first expansion valve (24) are both closed, the compressor (21) is stopped, the refrigerant pump (13) is started, and the indoor fan (26) and the outdoor fan (12) are running.

4. The cooling system according to claim 1, characterized in that: A first circulation loop formed by the outdoor heat exchanger (11), the refrigerant pump (13), the first heat exchange channel (221) and the indoor heat exchanger (25) is filled with a first refrigerant, and a second circulation loop formed by the compressor (21), the second heat exchange channel (222), the first expansion valve (24) and the evaporator (23) is filled with a second refrigerant.

5. The cooling system according to claim 4, characterized in that: The first refrigerant and the second refrigerant are the same or different.

6. The cooling system according to claim 1, characterized in that: The wind wall module (2) does not include an indoor heat exchanger (25); The outlet of the refrigerant pump (13) is respectively connected to the inlet of the first heat exchange channel (221) of the condenser (22) and the inlet of the evaporator (23), and the outlet of the evaporator (23) is connected to the inlet of the outdoor heat exchanger (11).

7. The cooling system according to claim 6, characterized in that: A second expansion valve (27) is provided on the pipeline between the outlet of the refrigerant pump (13) and the inlet of the first heat exchange channel (221); A fourth expansion valve (29) is provided on the pipeline between the outlet of the refrigerant pump (13) and the inlet of the evaporator (23), and a control valve (210) is provided on the pipeline between the outlet of the evaporator (23) and the inlet of the outdoor heat exchanger (11).

8. The cooling system according to claim 7, characterized in that: The cooling system includes compressor mode, hybrid cooling mode and free cooling mode; In the compressor mode, the first expansion valve (24) and the second expansion valve (27) are both opened, the fourth expansion valve (29) and the control valve (210) are both closed, the compressor (21) is started, the refrigerant pump (13) is started, and the indoor fan (26) and the outdoor fan (12) are running; In the mixed cooling mode, the first expansion valve (24), the second expansion valve (27), the fourth expansion valve (29) and the control valve (210) are all opened, the compressor (21) is started, the refrigerant pump (13) is started, and the indoor fan (26) and the outdoor fan (12) are running; In the natural cooling mode, the fourth expansion valve (29) and the control valve (210) are both opened, the first expansion valve (24) and the second expansion valve (27) are both closed, the compressor (21) is stopped, the refrigerant pump (13) is started, and the indoor fan (26) and the outdoor fan (12) are running.

9. The cooling system according to any one of claims 1 to 8, characterized in that: The outdoor heat exchanger (11) comprises an evaporative cooler (111) and a dry cooler (112), and the evaporative cooler (111) and the dry cooler (112) are connected in parallel or in series.

10. The cooling system according to claim 9, characterized in that The cooling tower module (1) further comprises a shell (14), a spray assembly (15) and a cooling filler (16); the outdoor heat exchanger (11), the outdoor fan (12), the refrigerant pump (13), the spray assembly (15) and the cooling filler (16) are all located in the shell (14); The spray assembly (15) comprises a nozzle (151), a liquid collecting tank (152) and a spray pump (153); The evaporative cooler (111) is located above the cooling filler (16), the liquid collecting tank (152) is arranged below the cooling filler (16), the nozzle (151) sprays cooling liquid toward the evaporative cooler (111), the cooling liquid evaporates and absorbs heat on the surface of the evaporative cooler (111) and in the cooling filler (16), and the rest of the cooling liquid is collected in the liquid collecting tank (152), and the spray pump (153) is connected between the liquid collecting tank (152) and the nozzle (151); An air passage (141) is also provided in the shell (14); the cooling filler (16), the dry cooler (112) and the outdoor fan (12) are arranged in sequence in the air passage (141); and outdoor air flows through the cooling filler (16), the dry cooler (112) and the outdoor fan (12) in sequence.

11. The cooling system according to any one of claims 1 to 8, characterized in that: A fifth expansion valve (32) is provided on the pipeline between the inlet of the at least one liquid cooling plate (31) and the outlet of the refrigerant pump (13).

12. The cooling system according to any one of claims 1 to 8, characterized in that: The cold plate module (3) further comprises a cold distribution module (33): The refrigerant inlet of the cold distribution module (33) is connected to the outlet of the refrigerant pump (13), and the refrigerant outlet of the cold distribution module (33) is connected to the inlet of the outdoor heat exchanger (11); The outlet of the cold distribution module (33) is connected to the inlet of the at least one liquid cooling plate (31), and the inlet of the cold distribution module (33) is connected to the outlet of the at least one liquid cooling plate (31).

13. The cooling system according to claim 12, characterized in that A fifth expansion valve (32) is provided on the pipeline between the refrigerant inlet of the cooling capacity distribution module (33) and the outlet of the refrigerant pump (13); A circulating pump (34) is provided on the pipeline between the outlet of the cooling capacity distribution module (33) and the inlet of the at least one liquid cooling plate (31).

14. A data center, characterized in that: The data center comprises the cooling system of any one of claims 1 to 13.

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