A data center cooling system

Abstract

This disclosure provides a data center cooling system, relating to the field of cloud computing technology, and particularly to the field of data center cooling. The data center cooling system includes a cold source component, a liquid cooling system, an air cooling system, and a temperature detection mechanism. The liquid cooling system provides liquid cooling for the liquid-cooled equipment, and the air cooling system cools the indoor data center environment. The air cooling system includes a first air cooling component and a second air cooling component. When the temperature detection mechanism detects that the outlet temperature of the cooling tower is lower than the required inlet water temperature of the primary side of the first heat exchanger, the first air cooling component can be connected in series between the outlet of the cooling tower and the primary side inlet of the first heat exchanger, or the second air cooling component can be connected in parallel between the primary side inlet and the primary side outlet of the first heat exchanger, depending on the temperature range. This achieves the purpose of increasing the circulating water temperature and reducing the indoor temperature of the data center. This data center cooling system not only integrates the liquid cooling system and the air cooling system but also improves the heat exchange efficiency of the cooling tower.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of data center refrigeration, and particularly relates to a data center cooling system. BACKGROUND

[0002] As the underlying physical support of cloud computing, the reliable and stable operation of a data center is of the utmost importance. A data center generates a large amount of heat during operation, and if the heat cannot be dissipated in time, the reliability and stability of the operation of the data center will be seriously affected. The main methods for cooling a data center include liquid cooling and air cooling.

[0003] A single cooling method cannot meet the cooling requirements of a data center, and therefore a cooling system for a data center usually includes a liquid cooling system for cooling cabinets and an air cooling system for cooling the environment. However, the liquid cooling system and the air cooling system of the existing cooling system are independent and run separately, and the overall structure is complex and difficult to maintain. Moreover, because the cabinets have requirements on the liquid cooling temperature, when the temperature of the primary side of the liquid cooling system is low, part of the cooling capacity needs to be sacrificed, thereby causing energy waste and low heat exchange efficiency. SUMMARY

[0004] The present disclosure provides a data center cooling system which not only integrates a liquid cooling system and an air cooling system together, but also makes full use of the cooling capacity provided by a cooling tower, thereby improving the heat exchange efficiency of the cooling tower.

[0005] A data center cooling system comprises: a cold source assembly comprising a cold tower, a liquid inlet pipe and a liquid outlet pipe; a liquid cooling system comprising a first heat exchanger, a first cooling liquid pipe, a second cooling liquid pipe and at least one liquid cooling device, a primary side of the first heat exchanger is communicated with the cold tower through the liquid inlet pipe and the liquid outlet pipe to form a first circulation loop, the first cooling liquid pipe is connected between a secondary side inlet of the first heat exchanger and a liquid outlet of the liquid cooling device, the second cooling liquid pipe is connected between a secondary side outlet of the first heat exchanger and a liquid inlet of the liquid cooling device, the secondary side of the first heat exchanger, the first cooling liquid pipe, the second cooling liquid pipe and the liquid cooling device form a second circulation loop; an air cooling system arranged in a data center room and used for cooling the room, the air cooling system comprises a first air cooling assembly and a second air cooling assembly, the first air cooling assembly is selectively connected in series between a water outlet of the cold tower and a primary side inlet of the first heat exchanger, the second air cooling assembly is selectively connected in parallel between the primary side inlet of the first heat exchanger and a primary side outlet of the first heat exchanger; a temperature detection mechanism used for obtaining a temperature T of the water outlet of the cold tower, when the temperature T obtained by the temperature detection mechanism is less than or equal to a first preset temperature T1, the first air cooling assembly is connected in series between the water outlet of the cold tower and the primary side inlet of the first heat exchanger, when the temperature T obtained by the temperature detection mechanism is greater than the first preset temperature T1 and less than or equal to a second preset temperature T2, the second air cooling assembly is connected in parallel between the primary side inlet and the primary side outlet of the first heat exchanger, and the second preset temperature T2 is a required water inlet temperature of the primary side of the first heat exchanger.

[0006] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present disclosure, nor to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0007] The accompanying drawings are used to better understand the present scheme and do not limit the present disclosure. Among them:

[0008] Figure 1 is a schematic diagram of a data center cooling system according to an embodiment of the present disclosure;

[0009] Figure 2 is a schematic diagram of a data center cooling system in a liquid cooling mode according to an embodiment of the present disclosure;

[0010] Figure 3 is a schematic diagram of a data center cooling system in a water cooling mode according to an embodiment of the present disclosure;

[0011] Figure 4is a schematic view of a data center cooling system in a compressor mode according to embodiments of the present disclosure.

[0012] In the drawings:

[0013] 1, cooling tower; 2, liquid inlet pipe; 3, liquid outlet pipe; 4, first pump; 5, first heat exchanger; 6, first cooling liquid pipe; 7, second cooling liquid pipe; 8, liquid cooling device; 9, second pump; 10, first evaporator; 11, first check valve; 12, first pipe; 13, second pipe; 14, second regulating valve; 15, second heat exchanger; 16, third pipe; 17, fourth pipe; 18, compressor; 19, second evaporator; 20, expansion valve; 21, fifth pipe; 22, second check valve; 23, third regulating valve; 24, first on-off valve; 25, second on-off valve; 26, fourth on-off valve; 27, first regulating valve; 28, bypass pipe; 29, bypass valve; 30, fifth on-off valve; 31, sixth on-off valve. DETAILED DESCRIPTION

[0014] Exemplary embodiments of the present disclosure are described herein with reference to the accompanying drawings, which are presented for the purpose of illustration and description. These embodiments are described in detail in order to provide what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present disclosure. Thus, it will be apparent to one of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0015] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the purpose of facilitating the description of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second", are for the purpose of description only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0016] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0017] Figure 1is a structural schematic diagram of a data center cooling system according to an embodiment of the present disclosure. The embodiment of the present disclosure can be applicable to the case of cooling liquid cooling equipment and indoor environment of a data center. Referring to Figure 1 As shown in the figure, the data center cooling system specifically comprises a cold source assembly, a liquid cooling system, an air cooling system and a temperature detection mechanism. The cold source assembly comprises a cooling tower 1, a liquid inlet pipe 2, a liquid outlet pipe 3 and a first pump 4. The cooling tower 1 uses water as a circulating coolant. The cooling tower 1 uses water to contact with air flow to exchange cold and heat and generate steam. The steam volatilization takes away heat to achieve the evaporation heat dissipation device of reducing water temperature. The cooling tower 1 has a water inlet and a water outlet. The water inlet is located above the water outlet. One end of the liquid inlet pipe 2 is in communication with the water inlet of the cooling tower 1. Through the liquid inlet pipe 2, water with a higher temperature can be output to the cooling tower 1. The water in the cooling tower 1 moves from top to bottom to the water outlet, and the water temperature decreases in the process. One end of the liquid outlet pipe 3 is in communication with the water outlet of the cooling tower 1. Through the liquid outlet pipe 3, the water with a reduced temperature in the cooling tower 1 can be transmitted and output. The first pump 4 is arranged on the liquid inlet pipe 2 and is used to provide power for water circulation. Other specific structures of the cooling tower 1 are prior art and will not be described here.

[0018] The liquid cooling system comprises a first heat exchanger 5, a first cooling liquid pipe 6, a second cooling liquid pipe 7, a second pump 9 and at least one liquid cooling equipment 8. In some embodiments, the first heat exchanger 5 is a plate heat exchanger. The first heat exchanger 5 comprises a primary side and a secondary side. The outlet of the primary side of the first heat exchanger 5 is in communication with the other end of the liquid inlet pipe 2, and the inlet of the primary side of the first heat exchanger 5 is in communication with the outlet of the liquid outlet pipe 3. Through the liquid inlet pipe 2 and the liquid outlet pipe 3, the cooling tower 1, the first pump 4 and the primary side of the first heat exchanger 5 can be connected to form a first circulation loop. Under the driving of the first pump 4, the circulating water can flow in the first circulation loop.

[0019] The inlet of the secondary side of the first heat exchanger 5 is in communication with one end of the first cooling liquid pipe 6, the outlet of the secondary side of the first heat exchanger 5 is in communication with the second cooling liquid pipe 7, the liquid inlet of the liquid cooling equipment 8 is in communication with the second cooling liquid pipe 7, the liquid outlet of the liquid cooling equipment 8 is in communication with the other end of the first cooling liquid pipe 6, and the second pump 9 is arranged on the first cooling liquid pipe 6. Through the first cooling liquid pipe 6 and the second cooling liquid pipe 7, the secondary side of the first heat exchanger 5, the second pump 9 and the liquid cooling equipment 8 can be connected to form a second circulation loop. Under the driving of the second pump 9, the cooling liquid can flow in the second circulation loop.

[0020] It should be noted that the cooling liquid can be water, organic solvent or freon, etc.

[0021] Further, the liquid cooling device 8 can be set as multiple according to the requirement, and the multiple liquid cooling devices 8 are connected in parallel between the first cooling liquid pipe 6 and the second cooling liquid pipe 7, so that the liquid cooling system can cool multiple liquid cooling devices 8 at the same time. In this way, the cooling of multiple liquid cooling devices 8 is realized at the same time, and the refrigeration cost is reduced. In some specific embodiments, the liquid cooling device 8 includes but is not limited to a liquid cooling cabinet, a liquid cooling immersion server or a chip heat cold plate exchange that needs to be liquid cooled.

[0022] With reference to Figure 1 As shown, the air cooling system is arranged in the data center room and used for cooling the indoor environment of the data center. It should be noted that the outdoor environment temperature of the cooling tower 1 changes with the season, and the fan and the first pump 4 in the cooling tower 1 have a minimum requirement for the frequency when working. If the frequency of the fan and the first pump 4 is reduced, the equipment components (such as bearings) will be damaged, thereby reducing the service life of the entire cooling source assembly. Therefore, if the fan and the first pump 4 of the cooling tower 1 are normally operated, as the outdoor environment temperature decreases, the outlet water temperature of the cooling tower 1 will be lower, and the inlet water temperature of the first heat exchanger 5 cannot be met. The embodiment of the present disclosure integrates the air cooling system and the liquid cooling system together, which not only improves the integration degree of the entire system, simplifies the structure, reduces the maintenance difficulty, but also uses the air cooling system to consume part of the cold energy in the circulating water with low temperature flowing out of the cooling tower 1, so as to achieve the purpose of cooling the indoor environment of the data center and other equipment that needs air cooling.

[0023] With reference to Figure 1 As shown, the air cooling system includes a first air cooling assembly and a second air cooling assembly. The first air cooling assembly is selectively connected in series between the outlet of the cooling tower 1 and the inlet of the first heat exchanger 5. The second air cooling assembly is selectively connected in parallel between the inlet of the first heat exchanger 5 and the outlet of the first heat exchanger 5.

[0024] According to the temperature range of the circulating water flowing out of the outlet of the cooling tower 1, the first air cooling assembly or the second air cooling assembly is selected to be started. The temperature detection mechanism is used to obtain the temperature T of the outlet of the cooling tower 1. In some embodiments, the temperature detection mechanism is a temperature sensor.

[0025] When the temperature T acquired by the temperature detection mechanism is less than or equal to the first preset temperature T1 (for example, 20°C), the first air cooling assembly is connected in series between the water outlet of the cooling tower 1 and the primary side inlet of the first heat exchanger 5. At this time, the circulating water flowing out of the cooling tower 1 first flows into the first air cooling assembly, and heat exchange between the circulating water and the indoor environment is achieved through the first air cooling assembly, so that the temperature of the circulating water is increased and the temperature of the indoor environment is decreased. After the circulating water flows out of the first air cooling assembly, it flows into the first heat exchanger 5 through the primary side inlet of the first heat exchanger 5. In the first heat exchanger 5, the circulating water exchanges heat with the cooling liquid in the second circulating loop, and the circulating water is heated for the second time and then flows out of the first heat exchanger 5 and is returned to the cooling tower 1 for cooling under the action of the first pump 4, so as to achieve the purpose of improving the heat exchange efficiency of the cooling tower 1.

[0026] When the temperature T acquired by the temperature detection mechanism is greater than the first preset temperature T1 and less than or equal to the second preset temperature T2, the second air cooling assembly is connected in parallel between the primary side inlet and the primary side outlet of the first heat exchanger 5. It should be noted that the second preset temperature T2 is the required inlet water temperature of the primary side of the first heat exchanger 5. At this time, the circulating water flowing out of the cooling tower 1 first flows into the second air cooling assembly, and heat exchange between the circulating water and the indoor environment is achieved through the second air cooling assembly, so that the temperature of the circulating water is increased and the temperature of the indoor environment is decreased. After the circulating water flows out of the second air cooling assembly, it is directly returned to the cooling tower 1 for cooling due to the high temperature, instead of flowing through the first heat exchanger 5, so as to achieve the purpose of improving the heat exchange efficiency of the cooling tower 1.

[0027] It should be noted that the first preset temperature T1 and the second preset temperature T2 can be adjusted according to requirements. For example, the first preset temperature T1 can be 20°C, and the second preset temperature T2 can be 30°C.

[0028] In some embodiments, the first air cooling assembly includes a first evaporator 10, a first one-way valve 11, a first pipe 12, and a second pipe 13. The inlet of the first evaporator 10 is connected to point A of the liquid outlet pipe 3 through the first pipe 12, the outlet of the first evaporator 10 is connected to point B of the liquid outlet pipe 3 through the second pipe 13, point A is located upstream of point B, and the first one-way valve 11 is arranged on the second pipe 13. The first evaporator 10 is arranged in the indoor environment of the data center, and the evaporation of the circulating water in the first evaporator 10 can achieve the purpose of absorbing the heat of the indoor air. The first air cooling assembly has a simple structure and is easy to control. In some more specific embodiments, the first air cooling assembly includes a first evaporator fan. Of course, in other embodiments, the first air cooling assembly can also be other mechanisms that can air cool and cool the indoor environment.

[0029] Further, a first switch valve 24 is arranged on the liquid outlet pipe 3, the first switch valve 24 is located between the A point and the B point, a second switch valve 25 is arranged on the first pipe 12, by controlling the opening and closing of the first switch valve 24 and the second switch valve 25, the circulating water in the cold tower 1 can enter the first evaporator 10 or directly flow into the primary side of the first heat exchanger 5 without passing through the first evaporator 10. Specifically, when the circulating water needs to pass through the first evaporator 10, the first switch valve 24 is controlled to be closed, and the second switch valve 25 is controlled to be opened; when the circulating water needs to directly flow into the primary side of the first heat exchanger 5 without passing through the first evaporator 10, the first switch valve 24 is controlled to be closed, and the second switch valve 25 is controlled to be opened. In some specific embodiments, the first switch valve 24 and the second switch valve 25 are both solenoid valves, which can be directly purchased and are easy to control.

[0030] Further, a first regulating valve 27 is also arranged on the liquid outlet pipe 3, the first regulating valve 27 is also located between the A point and the B point, and the first regulating valve 27 is used to adjust the flow rate in the part of the liquid outlet pipe 3 between the A point and the B point. By arranging the first regulating valve 27, the circulating water amount in the liquid outlet pipe 3 can be accurately controlled, which is beneficial to further improve the heat exchange efficiency. The liquid cooling device 8 on the secondary side of the first heat exchanger 5 controls the opening degree of the first regulating valve 27 according to the water supply target temperature, and controls the frequency of the second pump 9 through differential pressure control. In some embodiments, the first regulating valve 27 is located downstream of the first switch valve 24.

[0031] Further, a second regulating valve 14 is also arranged on the first pipe 12, and the second regulating valve 14 is used to adjust the amount of circulating water entering the first evaporator 10. By arranging the second regulating valve 14, the circulating water amount in the first evaporator 10 can be accurately controlled, which is beneficial to further improve the heat exchange efficiency. In some embodiments, the second regulating valve 14 is located downstream of the second switch valve 25. In some more specific embodiments, the first regulating valve 27 and the second regulating valve 14 are both solenoid valves, which can be directly purchased and are easy to control.

[0032] Continuing to refer to Figure 1As shown, the second air cooling assembly includes a second heat exchanger 15, a compressor 18, a second evaporator 19, an expansion valve 20, a second check valve 22, a third pipe 16 and a fourth pipe 17, the primary side inlet of the second heat exchanger 15 is communicated with the liquid outlet pipe 3 through the third pipe 16, the primary side outlet of the second heat exchanger 15 is communicated with the liquid inlet pipe 2 through the fourth pipe 17, the secondary side inlet of the second heat exchanger 15, the compressor 18, the second evaporator 19, the expansion valve 20 and the secondary side outlet of the second heat exchanger 15 are communicated into a third circulation loop through a fifth pipe 21, and the second check valve 22 is arranged on the fourth pipe 17. The second air cooling assembly has simple structure and can utilize the excess cold energy output by the cold tower through the second heat exchanger 15. It should be noted that the mechanism composed of the compressor 18, the second evaporator 19 and the expansion valve 20 is equivalent to the indoor unit part of the air cooling air conditioner located indoors, and the second heat exchanger 15 assumes the function of the outdoor unit.

[0033] The second evaporator 19 is arranged indoors of the data center, and the refrigerant in the third circulation loop can be evaporated in the first evaporator 10 to achieve the purpose of absorbing the heat of indoor air to reduce the indoor temperature. The second heat exchanger 15 can exchange heat between the circulating water on the primary side and the refrigerant on the secondary side, so as to achieve the purpose of heating the circulating water. In some more specific embodiments, the second air cooling assembly includes a second evaporator fan. Of course, in other embodiments, the second air cooling assembly can also be other mechanisms capable of air cooling and cooling the indoor environment.

[0034] In some embodiments, the third pipe 16 and the first pipe 12 are two independent pipe fittings, and the connection between the third pipe 16 and the liquid outlet pipe 3 can be the same as the connection between the first pipe 12 and the liquid outlet pipe 3, that is, a four-way valve is arranged at point A, and the four valve ports of the four-way valve are respectively communicated with the first pipe 12, the third pipe 16 and two parts of the liquid outlet pipe 3. Of course, the connection between the third pipe 16 and the liquid outlet pipe 3 can also be different from the connection between the first pipe 12 and the liquid outlet pipe 3, that is, the connection between the third pipe 16 and the liquid outlet pipe 3 is arranged at intervals from point A.

[0035] It should be noted that when the third pipe 16 and the first pipe 12 are two independent pipe fittings, a third on-off valve (not shown in the figure) is arranged on the third pipe 16, and the opening and closing of the third pipe 16 can be controlled through the third on-off valve. In some embodiments, the third on-off valve is an electromagnetic valve, which can be directly purchased and is easy to control.

[0036] Of course, in some other embodiments, the third pipe 16 can also be directly communicated with the first pipe 12, one end of the third pipe 16 being communicated at a middle portion of the first pipe 12, where the middle portion is not strictly the midpoint of the first pipe 12, but any position between the two end points of the first pipe 12. Further, by arranging the second switch valve 25 upstream of the position where the third pipe 16 is connected to the first pipe 12, the purpose of simultaneously controlling the third pipe 16 and the first pipe 12 by the second switch valve 25 can be achieved, and in this case, the third switch valve does not need to be arranged.

[0037] The above three methods of connecting the third pipe 16 to the liquid outlet pipe 3 improve the flexibility of connecting the third pipe 16 to the liquid outlet pipe 3.

[0038] Further, the third regulating valve 23 is arranged on the third pipe 16, and the third regulating valve 23 is used to regulate the flow of the circulating water flowing into the third pipe 16. By arranging the third regulating valve 23, the amount of circulating water in the third pipe 16 can be accurately controlled, which is conducive to further improving the heat exchange efficiency. In some embodiments, the third regulating valve 23 is an electromagnetic valve, which can be directly purchased and is easy to control.

[0039] Further, the fourth switch valve 26 is arranged on the fourth pipe 17, and the fourth switch valve 26 is used to control the on-off of the fourth pipe 17. The fifth switch valve 30 is arranged on the liquid outlet pipe 3, and the fifth switch valve 30 is used to control the on-off of the fifth pipe 21. The sixth switch valve 31 is arranged on the liquid inlet pipe 2, and the sixth switch valve 31 is used to control the on-off of the sixth pipe. In some embodiments, the fourth switch valve 26, the fifth switch valve 30, and the sixth switch valve 31 are all electromagnetic valves, which can be directly purchased and are easy to control.

[0040] Continuing to refer to Figure 1 As shown in the figure, the data center cooling system further comprises a bypass pipe 28 and a bypass valve 29, one end of the bypass pipe 28 being communicated with the liquid inlet pipe 2, the other end of the bypass pipe 28 being communicated with the liquid outlet pipe 3, the bypass valve 29 being arranged on the bypass pipe 28, and the bypass pipe 28 being located on the side of the first pump 4 close to the cold tower 1. The bypass valve 29 can be used to divide the circulating water in the liquid inlet pipe 2, that is, according to the demand, the water in the liquid inlet pipe 2 can be divided into two parts, one part directly flows back to the cold tower 1 for cooling, and the other part directly flows into the liquid outlet pipe 3. Since the temperature of the water in the liquid inlet pipe 2 is relatively high, and the temperature of the water in the liquid outlet pipe 3 is relatively low, at least part of the water in the liquid inlet pipe 2 is returned to the liquid outlet pipe 3, which can achieve the purpose of increasing the water temperature on the primary side of the first heat exchanger 5.

[0041] It should be noted that the arrangement of the first air cooling assembly and the second air cooling assembly weakens the role of the bypass pipe 28 and the bypass valve 29, but the arrangement of the bypass pipe 28 and the bypass valve 29 can assist in more accurately adjusting the temperature in the liquid outlet pipe 3.

[0042] Further, the number of cold source assemblies is multiple. The multiple cold source assemblies are connected with the first heat exchanger 5 through the first ring network. Of course, the number of the first heat exchanger 5 can also be multiple, that is, the inlet pipe 2 of the multiple cold source assemblies is in communication with the outlet of the primary side of the multiple first heat exchangers 5 through the inlet ring network, and the outlet pipe 3 of the multiple cold source assemblies is in communication with the inlet of the primary side of the multiple first heat exchangers 5 through the outlet ring network. The multiple cold source assemblies are backup for each other, and the simultaneous operation of the multiple cold source assemblies can improve the cooling capacity of the entire data center cooling system. When the multiple cooling towers 1 are operated in parallel, a bypass circuit can be added to improve the system redundancy and the working efficiency of a single system.

[0043] Further, the data center cooling system further comprises a control system, and the control system comprises a controller. The controller can be centralized or distributed. For example, the controller can be a single microcontroller or a plurality of microcontrollers distributed in a distributed manner. The microcontroller can run a control program to control all components included in the system to realize their functions.

[0044] Further, the data center cooling system further comprises an intelligent interface and a detection platform. The data involved in the data center cooling system can be transmitted to the detection platform through the intelligent interface for detection by the staff. The transmittable data includes the temperature detected by the temperature detection mechanism, the opening and closing states of various switch valves and electromagnetic valves, and the like.

[0045] Further, an expansion port is added between the first liquid cooling pipeline and the second liquid cooling pipeline of the liquid cooling system to connect a standby liquid cooling pipeline, so that more liquid cooling equipment 8 can be connected, thereby achieving the purposes of convenient expansion and optimization.

[0046] Further, the first pipe 12, the second pipe 13, the third pipe 16, the fourth pipe 17 and the fifth pipe 21 included in the air cooling system are all provided with quick sockets to achieve the purposes of convenient connection, convenient disassembly, simple expansion and convenient maintenance. In some embodiments, the first pipe 12, the second pipe 13, the third pipe 16, the fourth pipe 17 and the fifth pipe 21 are connected by soft pipe quick sockets, which can make the construction, backup, emergency and maintenance very convenient.

[0047] The data center cooling system includes three working modes of liquid cooling mode, water cooling mode and compressor mode. The following will be described in combination with the accompanying drawings. Figures 2-4 The flow modes of the cooling medium in the system in the three working modes will be introduced.

[0048] Figure 2The flow path of the medium in the liquid cooling mode is shown. When the outdoor temperature of the cooling tower 1 is high, the temperature of the circulating water flowing out of the cooling tower 1 can meet the required inlet water temperature of the primary side of the first heat exchanger 5, and the flow paths of the circulating water of the primary side of the first heat exchanger 5 and the cooling liquid of the secondary side of the first heat exchanger 5 are as shown by the arrows in Figure 2

[0049] Figure 3 The flow path of the medium in the liquid cooling mode is shown. When the outdoor temperature of the cooling tower 1 is high, the temperature of the circulating water flowing out of the cooling tower 1 can meet the required inlet water temperature of the primary side of the first heat exchanger 5, and the flow paths of the circulating water of the primary side of the first heat exchanger 5 and the cooling liquid of the secondary side of the first heat exchanger 5 are as shown by the arrows in Figure 3

[0050] Figure 4 The flow path of the medium in the liquid cooling mode is shown. When the outdoor temperature of the cooling tower 1 is high, the temperature of the circulating water flowing out of the cooling tower 1 can meet the required inlet water temperature of the primary side of the first heat exchanger 5, and the flow paths of the circulating water of the primary side of the first heat exchanger 5 and the cooling liquid of the secondary side of the first heat exchanger 5 are as shown by the arrows in Figure 4

[0051] The data center cooling system provided by the embodiments of the present disclosure has the following advantages:

[0052] 1. The system integrates the liquid cooling system and the air cooling system together. Compared with the liquid cooling system and the air cooling system arranged independently, the system provided by the embodiments has simple structure, low manufacturing cost, reduces the workload and working strength of the operation and maintenance personnel, improves the operation and maintenance efficiency and quality, and guarantees the safe and stable operation of the data center.

[0053] 2. The air cooling system of the system adopts the double cold source cooling mode, and has the water cooling mode and the compressor mode, can use the primary side circulating water of the liquid cooling to cool the computer room environment, reduces the role of the bypass valve 29, avoids the energy waste caused by the need to frequently open the bypass valve 29 and make the hot water backflow to increase the primary side water supply temperature, improves the utilization rate of the primary side circulating water, reduces the energy consumption, and improves the heat exchange efficiency of the cooling tower 1. ​​​

[0054] 3. This system can improve the efficiency of the cooling tower fan and the first pump 4, and can avoid bearing wear caused by excessively low frequency.

[0055] 4. By adding an expansion port, a spare liquid cooling pipeline can be connected between the first and second liquid cooling pipelines of the system, thereby increasing the number of liquid cooling devices 8 as needed, which facilitates expansion and optimization.

[0056] 5. The system's piping uses quick-connect fittings, making connection and disassembly convenient and maintenance simple. Furthermore, the use of flexible quick-connect tubing eliminates the need for external hard-connection pipes, facilitating construction, backup, emergency response, and maintenance.

[0057] 6. The system uses check valves and regulating valves; using different valves can improve economic efficiency.

[0058] 7. The system can achieve long-distance data transmission and can be connected to an integrated monitoring platform.

[0059] 8. This system can enable multiple cooling towers to operate in parallel, improving system redundancy and single-system efficiency.

[0060] Obviously, the above embodiments of this disclosure are merely examples for clear illustration and are not intended to limit the implementation of this disclosure. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of the claims of this disclosure.

[0061] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A data center cooling system, comprising: a cold source assembly, comprising a cooling tower (1), a liquid inlet pipe (2) and a liquid outlet pipe (3) ; a liquid cooling system, comprising a first heat exchanger (5), a first cooling liquid pipe (6), a second cooling liquid pipe (7) and at least one liquid cooling device (8), a primary side of the first heat exchanger (5) is communicated with the cooling tower (1) through the liquid inlet pipe (2) and the liquid outlet pipe (3) to form a first circulation loop, the first cooling liquid pipe (6) is connected between a secondary side inlet of the first heat exchanger (5) and a liquid outlet of the liquid cooling device (8), the second cooling liquid pipe (7) is connected between a secondary side outlet of the first heat exchanger (5) and a liquid inlet of the liquid cooling device (8), and a secondary side of the first heat exchanger (5), the first cooling liquid pipe (6), the second cooling liquid pipe (7) and the liquid cooling device (8) are communicated to form a second circulation loop; an air cooling system, which is arranged in a data center room and used for cooling the room, the air cooling system comprising a first air cooling assembly and a second air cooling assembly, the first air cooling assembly is selectively connected in series between a water outlet of the cooling tower (1) and a primary side inlet of the first heat exchanger (5), and the second air cooling assembly is selectively connected in parallel between the primary side inlet of the first heat exchanger (5) and a primary side outlet of the first heat exchanger (5) ; a temperature detection mechanism, which is used for obtaining a temperature T of the water outlet of the cooling tower (1), when the temperature T obtained by the temperature detection mechanism is less than or equal to a first preset temperature T1, the first air cooling assembly is connected in series between the water outlet of the cooling tower (1) and the primary side inlet of the first heat exchanger (5), when the temperature T obtained by the temperature detection mechanism is greater than the first preset temperature T1 and less than or equal to a second preset temperature T2, the second air cooling assembly is connected in parallel between the primary side inlet and the primary side outlet of the first heat exchanger (5), and the circulating water flowing out of the cooling tower (1) first flows into the second air cooling assembly, the heat exchange between the circulating water and the indoor environment is realized through the second air cooling assembly, and the circulating water after heat exchange directly flows back to the cooling tower (1) for cooling, and the second preset temperature T2 is a required water inlet temperature of the primary side of the first heat exchanger (5) ; the second air cooling assembly comprises: a second heat exchanger (15), a primary side inlet of the second heat exchanger (15) is communicated with the liquid outlet pipe (3) through a third pipe (16), and a primary side outlet of the second heat exchanger (15) is communicated with the liquid inlet pipe (2) through a fourth pipe (17) ; a compressor (18), a second evaporator (19) and an expansion valve (20), a secondary side inlet of the second heat exchanger (15), the compressor (18), the second evaporator (19), the expansion valve (20) and a secondary side outlet of the second heat exchanger (15) are communicated to form a third circulation loop through a fifth pipe (21) ; a second one-way valve (22), which is arranged on the fourth pipe (17).

2. The data center cooling system of claim 1, wherein, The first air cooling assembly comprises: a first evaporator (10), an inlet of the first evaporator (10) being communicated with point A of the liquid outlet pipe (3) through a first pipe (12), an outlet of the first evaporator (10) being communicated with point B of the liquid outlet pipe (3) through a second pipe (13), the point A being upstream of the point B; a first check valve (11) arranged on the second pipe (13).

3. The data center cooling system according to claim 2, wherein a first regulating valve (27) is arranged on the liquid outlet pipe (3), and the first regulating valve (27) is located between the point A and the point B.

4. The data center cooling system according to claim 2, wherein a second regulating valve (14) is arranged on the first pipe (12).

5. The data center cooling system according to claim 2, wherein the third pipe (16) is connected to the point A of the liquid outlet pipe (3); or, the third pipe (16) is connected to the first pipe (12).

6. The data center cooling system according to claim 1, wherein a third regulating valve (23) is arranged on the third pipe (16).

7. The data center cooling system according to any one of claims 1-6, wherein the cold source assembly further comprises a first pump (4) arranged on the liquid inlet pipe (2); the data center cooling system further comprises a bypass pipe (28) and a bypass valve (29), one end of the bypass pipe (28) being communicated with the liquid inlet pipe (2), the other end of the bypass pipe (28) being communicated with the liquid outlet pipe (3), the bypass valve (29) being arranged on the bypass pipe (28), and the bypass pipe (28) being located on a side of the first pump (4) close to the cold tower (1).

8. The data center cooling system according to any one of claims 1-6, wherein the number of the cold source assemblies is multiple.

9. The data center cooling system according to any one of claims 1-6, wherein the number of the liquid cooling devices (8) is multiple, and multiple liquid cooling devices (8) are connected in parallel between the first cooling liquid pipe (6) and the second cooling liquid pipe (7).

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