CDU liquid cooling data center water cooling system

Abstract

The utility model discloses a CDU liquid cooling data center water cooling system, which belongs to the technical field of data center water cooling and comprises a frame body, and an ATS dual-power control cabinet, a PLC control cabinet and a plate heat exchanger are arranged in the frame body. The primary side water inlet pipe fitting is provided with two filters; the primary side water return pipe fitting is provided with a proportioning valve; the secondary side water inlet pipe fitting is provided with two filters; the secondary side water return pipe fitting is provided with a degassing tank, a safety valve and two power pumps; a system make-up pump is arranged between the degassing tank and the water tank; the safety valve is connected with the water tank. The expansion tank can avoid pressure fluctuation caused by water loss or temperature change; a system make-up pump pumps water in the water tank, and system pressure sudden drop caused by a large amount of water shortage is avoided; the safety valve is connected with the water tank to avoid sudden rising of system pressure; redundant design of no shutdown and no power failure when parts are damaged can be achieved, and maintenance and replacement without shutdown can be achieved. And the proportion adjusting valve is adjusted, cold supply adjustment is achieved, and the application range is wide.

Description

Technical Field

[0001] The utility model belongs to the technical field of water cooling of data centers, in particular to a water cooling system of a CDU liquid-cooled data center. Background Art

[0002] Traditional servers use air to remove the heat of heat-generating components, but there are problems such as high cooling energy consumption, high noise, and low equipment density. However, the high energy consumption and low performance problems that cannot be solved by air cooling can be significantly improved by using liquid cooling technology. Therefore, liquid-cooled big data centers have come into being, and it is imperative to provide water cooling systems for liquid-cooled big data centers.

[0003] The rapid development of super-large data centers and the lack of space carriers will intensify the rapid increase in the power density of a single cabinet, and the rapidly increasing power density will inevitably put forward higher requirements for heat dissipation. It can be seen that reducing heat dissipation power consumption, controlling data center operating costs, and building green data centers have become urgent tasks, and data centers call for a heat dissipation "revolution".

[0004] At present, using a cooling liquid distribution unit (CDU) to dissipate heat in a liquid-cooled data center is an effective way. The cooling capacity can reach 350KW, and it can also separate the internal and external water-cooling media, reducing the cost of water-cooling media quality operation and maintenance. Most existing CDUs are rack-mounted, providing a small amount of cooling, not very wide in scope, and lacking redundancy design. When the cooling system is overhauled, it is easy to cause system pressure fluctuations, making it difficult to meet the requirements of the data center for special situations without shutting down. Therefore, designing a water-cooling system with large cooling capacity, high safety and redundancy is of great significance to green and environmentally friendly big data centers. Utility Model Content

[0005] In order to solve the problem that most traditional CDUs are rack-mounted, provide small cooling capacity, have a narrow application range, lack redundant design, and are prone to system pressure fluctuations when the cooling system is repaired, making it difficult to meet the special requirements of the data center without shutting down, the utility model provides a CDU liquid-cooled data center water cooling system.

[0006] The utility model is realized by the following technical solutions:

[0007] A CDU liquid-cooled data center water cooling system comprises a frame body, in which an ATS dual power control cabinet, a PLC control cabinet, a plate heat exchanger, and a primary side water inlet pipe fitting, a primary side water return pipe fitting, a secondary side water inlet pipe fitting, and a secondary side water return pipe fitting connected to the plate heat exchanger are installed;

[0008] A primary side water inlet and two filters connected in parallel are installed on the primary side water inlet pipe fitting;

[0009] A proportional regulating valve and a primary side return water port are installed on the primary side return water pipe fitting;

[0010] A secondary side water outlet and two filters connected in parallel are installed on the secondary side water inlet pipe;

[0011] The secondary side return water pipe is equipped with a degassing tank, a safety valve, a secondary side return water port and two parallel power pumps; the upper side of the degassing tank is connected to an expansion tank, the lower side of the degassing tank is connected to a water tank, and a system water supply pump is provided between the water tank and the degassing tank; the safety valve is connected to the water tank;

[0012] Butterfly valves are installed at both ends of the filter;

[0013] The primary water inlet and the primary water return port are connected to the external cold water supply system; the secondary water outlet and the secondary water return port are connected to the server water cooling system.

[0014] A further improvement of the utility model is that the number of expansion tanks is two and they are installed in parallel on the upper side of the degassing tank.

[0015] A further improvement of the utility model is that it also includes a water tank replenishment pump connected to the upper side of the water tank.

[0016] A further improvement of the utility model is that the outlet end of the water tank water replenishment pump is communicated with the bottom of the degassing tank through a pipeline and is provided with a switch valve.

[0017] A further improvement of the utility model is that a liquid level sensor is provided on the side of the water tank.

[0018] A further improvement of the utility model is that an exhaust valve is connected and installed on the upper side of the degassing tank.

[0019] A further improvement of the utility model is that a temperature sensor and a pressure sensor are installed on one end of the primary side water inlet pipe near the primary side water inlet, a flow meter, a temperature sensor and a pressure sensor are installed on one end of the primary side return water pipe near the primary side return water outlet; a temperature sensor and a pressure sensor are installed on one end of the secondary side water inlet pipe near the secondary side water outlet; a flow meter, a temperature sensor and a pressure sensor are installed on one end of the secondary side return water pipe near the secondary side return water outlet.

[0020] A further improvement of the utility model is that the secondary side water inlet pipe and the secondary side water return pipe are connected through a first connecting pipe, and a two-way solenoid valve is installed on the first connecting pipe.

[0021] A further improvement of the utility model is that a vibration-proof pipe and a butterfly valve are respectively installed on both sides of the power pump.

[0022] A further improvement of the utility model is that a conductivity sensor and a PH sensor are respectively connected and installed on the secondary side water inlet pipe and the secondary side water return pipe.

[0023] It can be seen from the above technical solutions that the beneficial effects of the utility model are:

[0024] The use of expansion tanks can avoid system pressure fluctuations caused by a small amount of internal circulating water loss or temperature changes in the water-cooled closed-loop system; the system water supply pump extracts water from the water tank to solve the problem of sudden pressure drops in the system caused by a large amount of water shortage; the water tank is connected through a safety valve to solve unsafe factors such as sudden increases in system pressure caused by abnormal conditions; the filter and power pump are set in parallel in pairs, and equipped with an ATS dual-power control cabinet, so that the redundancy design of key components will not stop when damaged and will not lose power in special circumstances can be achieved, which can realize non-stop maintenance or replacement, avoiding the risk of data center downtime. And by adjusting the opening and closing size of the proportional control valve, the supply adjustment of the primary side cooling capacity can be achieved, which can be applied to the heat exchange of a wide range of secondary side water-cooling media, with a wide range of applications and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the system principle of a specific implementation method of the utility model.

[0027] Figure 2 It is a three-dimensional structural schematic diagram of a specific implementation method of the utility model.

[0028] Figure 3 It is a schematic diagram of the secondary side water inlet pipe structure of a specific implementation method of the utility model.

[0029] Figure 4 It is a front view schematic diagram of a specific implementation method of the utility model.

[0030] Figure 5 It is a side view schematic diagram of a specific implementation mode of the utility model.

[0031] In the attached figure: 1. frame body, 2. expansion tank, 3. water tank, 4. exhaust valve, 5. two-way solenoid valve, 6. proportional control valve, 7. safety valve, 8. degassing tank, 9. flow meter, 10. secondary side water outlet, 11. secondary side return water outlet, 12. butterfly valve, 13. power pump, 14. casters, 15. conductivity sensor, 16. PH sensor, 17. plate heat exchanger, 18. ATS dual power supply control cabinet, 19. system make-up water pump, 20. primary side water inlet, 21. primary side return water outlet, 22. water tank make-up water pump, 23. filter, 24. lens, 25. temperature sensor, 26. pressure sensor, 27. liquid level sensor, 28. vibration-proof pipe, 29. manual small ball valve, 30. check valve, 31. PLC control cabinet. DETAILED DESCRIPTION

[0032] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0033] like Figure 1 , 4 As shown, the utility model discloses a CDU liquid-cooled data center water cooling system, including a frame body 1, in which an ATS dual power control cabinet 18, a PLC control cabinet 31, a plate heat exchanger 17, and a primary side water inlet pipe fitting, a primary side water return pipe fitting, a secondary side water inlet pipe fitting, and a secondary side water return pipe fitting connected to the plate heat exchanger 17 are installed;

[0034] The primary water inlet pipe is equipped with an exhaust valve 4, a primary water inlet 20 and two filters 23 connected in parallel; the primary water return pipe is equipped with a proportional regulating valve 6 and a primary water return 21; the secondary water inlet pipe is equipped with an exhaust valve 4, a secondary water outlet 10 and two filters 23 connected in parallel; the secondary water return pipe is equipped with a degassing tank 8, a safety valve 7, a secondary water return 11 and two power pumps 13 connected in parallel, and a non-return valve 30 is installed at the inlet end of the power pump 13; the upper side of the degassing tank 8 is connected to an expansion tank 2; the lower side of the degassing tank 8 is connected to a water tank 3, and a system water supply pump 19 and a non-return valve 30 are provided between the water tank 3 and the degassing tank 8; the safety valve 7 is connected to the water tank 3;

[0035] The two ends of the filter 23 are respectively installed with butterfly valves 12, which can facilitate the cut-off and replacement operations of the filter 23, and can flexibly realize the backup and use of the filter 23;

[0036] The primary water inlet 20 and the primary water return 21 are connected to the external cold water supply system; the secondary water outlet 10 and the secondary water return 11 are connected to the server water cooling system. Heat exchange is achieved through the plate heat exchanger 17, which can achieve the isolation of the primary and secondary water cooling media, not only ensuring different water quality requirements, but also reducing costs.

[0037] The CDU liquid-cooled data center water cooling system uses an expansion tank 2 to avoid system pressure fluctuations caused by a small amount of internal circulating water loss or temperature changes in the water-cooled closed-loop system; the system water supply pump 19 extracts water from the water tank 3 to solve the problem of sudden pressure drop in the system caused by a large amount of water shortage; the water tank 3 is connected through a safety valve 7 to solve unsafe factors such as sudden increase in system pressure caused by abnormal conditions; the filter 23 and the power pump 13 are both set in parallel in pairs, and are equipped with an ATS dual-power control cabinet 18, so as to achieve a redundant design that does not shut down when key components are damaged and does not lose power in special circumstances, and can achieve non-stop maintenance or replacement, avoiding the risk of data center downtime. And by adjusting the opening and closing size of the proportional control valve 6, the supply adjustment of the primary side cooling capacity is achieved, which can be applied to the heat exchange of a wide range of secondary side water-cooling media, with a wide range of applications and good practicality.

[0038] Among them, Figure 1 , 3 As shown, a lens 24 for observing the water quality inside the pipeline is also installed on the secondary water inlet pipe. The water quality, particles of a certain size, the number and size of bubbles can be clearly and intuitively seen, and the flow direction of the water can also be observed.

[0039] Among them, Figure 1 As shown, there are two expansion tanks 2, which are installed in parallel on the upper side of the degassing tank 8. The redundant design of the expansion tank 2 is realized to ensure reliable and stable operation, and one can be used for backup and the other can be used, so that the expansion tank 2 can be repaired without stopping the machine, and the reliability of cooling the data center is ensured, and the downtime of the data center server is avoided.

[0040] Among them, Figure 1As shown, the water cooling system of the CDU liquid-cooled data center also includes a water tank replenishment pump 22 connected to the upper side of the water tank 3. The outlet end of the water tank replenishment pump 22 is connected to the bottom of the degassing tank 8 through a pipeline, and a switch valve and a one-way valve 30 are provided on the pipeline connecting the outlet end of the water tank replenishment pump 22 and the bottom of the degassing tank 8. A liquid level sensor 27 is provided on the side of the water tank 3. When the water level reaches the low liquid level threshold of the water tank 3, the water tank replenishment pump 22 is started to raise the liquid level of the water tank 3. When the water level reaches the high level threshold of the water tank 3, the water tank replenishment pump 22 is automatically shut down; and when the switch valve leading to the water tank 3 is closed and the valve leading to the degassing tank 8 is opened, the degassing tank 8 can be directly replenished with water through the water tank replenishment pump 22 to ensure the normal operation of the degassing tank 8, which can facilitate the maintenance of the water tank 3, the system replenishment pump 19, etc., and realize non-stop maintenance and replacement.

[0041] Among them, Figure 1 As shown, an exhaust valve 4 is also connected to the upper side of the degassing tank 8, and an exhaust valve 4 is installed at one end of the primary side water inlet pipe and the secondary side water inlet pipe close to the plate heat exchanger 17. The exhaust valve 4 can be used to discharge the gas in the degassing tank 8, the primary side cycle, and the secondary side cycle to avoid cavitation, ensure efficient heat exchange and cooling effect on the server. The exhaust valve 4 and the degassing tank 8 are used to discharge the gas mixed in the pipeline to protect the power pump 13 from cavitation. In addition, the oxygen content in the pipeline can be reduced, and the reproduction rate of microorganisms can be reduced; in addition, the bubble content in the pipeline is reduced, which improves the data acquisition accuracy of the sensor to a certain extent.

[0042] like Figure 1 As shown, a temperature sensor 25 and a pressure sensor 26 are connected and installed at one end of the primary water inlet 20 of the primary water inlet, and a flow meter 9, a temperature sensor 25 and a pressure sensor 26 are connected and installed at one end of the primary water return pipe near the primary water return 21; a temperature sensor 25 and a pressure sensor 26 are connected and installed at one end of the secondary water inlet pipe near the secondary water outlet 10; a flow meter 9, a temperature sensor 25 and a pressure sensor 26 are connected and installed at one end of the secondary water return pipe near the secondary water return 11. Pressure sensors 26 are also installed at one end of the primary water inlet pipe and the secondary water inlet pipe near the plate heat exchanger 17. The pressure sensor 26, the temperature sensor 25 and the flow meter 9 can realize accurate monitoring of the pressure, temperature and flow of the two cooling medium systems, and facilitate adjustment to achieve efficient cooling and heat dissipation of the server. This system can adopt two control strategies. One is a pressure control strategy that uses the data transmitted by the pressure sensor 26 as the main control variable to regulate the system flow; the other is to use the flow meter 9 to achieve a constant flow control strategy.

[0043] A small manual ball valve 29 is installed between the pressure sensor 26 and the pipe fitting, which can realize convenient inspection and disassembly of the pressure sensor 26.

[0044] Among them, Figure 1 As shown, the secondary side water inlet pipe and the secondary side water return pipe are connected through the first connecting pipe, and the first connecting pipe is installed with a two-way solenoid valve 5. By comparing the temperature sensors 25 of the secondary side water outlet 10 and the secondary side water return port 11, the proportional regulating valve 6 is adjusted to realize the supply control of the primary side cooling capacity. When the proportional regulating valve 6 is adjusted to a certain threshold value, the operating frequency of the secondary side power pump 13 is then adjusted to reduce the total flow delivered to the server. In addition, a bypass branch (i.e., the first connecting pipe) is set at the secondary side liquid inlet and return port, and the two-way solenoid valve 5 is turned on and off to realize the interconnection of the secondary side liquid inlet and return, thereby realizing power saving at low heat load and avoiding the problem of condensation due to excessively low temperature.

[0045] like Figure 1 As shown, vibration-proof pipes 28 and butterfly valves 12 are respectively installed on both sides of the power pump 13. The vibration-proof pipes 28 are used to absorb the vibration generated by the power pump 13 to protect the entire pipeline system; the butterfly valves 12 on both sides of the power pump 13 can shut down the power pump 13, realizing flexible standby and non-stop maintenance and replacement of the power pump 13.

[0046] like Figure 1 As shown, the secondary water inlet pipe and the secondary water return pipe are respectively connected and installed with a conductivity sensor 15 and a PH sensor 16. By using the conductivity sensor 15 and the PH sensor 16, the water quality monitoring in the pipeline is completed, and there is no need to collect water quality data separately, and data collection can be performed in real time.

[0047] Casters 14 are provided on the lower side of the frame body 1, and the casters 14 are used to realize convenient movement of the entire system.

[0048] When using this CDU liquid cooling data center water cooling system:

[0049] 1. When the system is used for the first time, it needs to be filled with liquid. The external water-cooling medium is directly extracted through the water tank water pump 22 and then injected into the system. When injecting the water-cooling medium, the power pump 13 needs to be frequently started and stopped to fill the entire system with the water-cooling medium. During this period, a certain amount of exhaust is performed through the exhaust valve 4 in the system. In this process, the pressure sensor 26 in the system monitors the system pressure change. When the predetermined pressure is reached and the power pump 13 is started, and the system pressure does not change, it can be considered that the system has completed the filling.

[0050] 2. After the system is running, the amount of bubbles in the system will become less and less as it passes through the exhaust valve 4 and the degassing tank 8. This can be clearly observed through the lens 24.

[0051] 3. The primary water inlet 20 and the primary water return 21 of the system are connected to an external chiller to provide a cold source for the system, and then the heat exchange between the primary and secondary sides is carried out through the plate heat exchanger 17, that is, the cold is transferred to the secondary side. The secondary water outlet 10 and the secondary water return 11 are connected to the liquid cooling server of the liquid cooling data center through the pipeline to solve the heat dissipation problem for the server.

[0052] 4. Observe the temperature sensor 25 first to avoid the temperature being lower than the dew point. Then, by comparing the pressure sensors 26 of the secondary water outlet 10 and the secondary water return port 11, the system's cooling capacity can be regulated with pressure as the control variable. Of course, the system's constant flow control strategy can also be achieved through the flow meter 9. When implementing the pressure control strategy, the proportional control valve 6 is adjusted first, then the power pump 13 is adjusted, and finally the two-way solenoid valve 5 is started. This is the order of precedence.

[0053] 5. With the access of liquid cooling servers or other leakage reasons, the static pressure of the system will drop, and the system needs to be replenished. The system replenishment pump 19 can be started to extract the water cooling medium from the water tank 3 to replenish the system. If there is a problem with the system replenishment pump 19, the system can directly use the water tank replenishment pump 22 to extract the external water cooling medium and directly replenish water to the system by closing the branch valve.

[0054] The CDU liquid-cooled data center water cooling system uses an expansion tank 2 to avoid system pressure fluctuations caused by a small amount of internal circulating water loss or temperature changes in the water-cooled closed-loop system; the system water supply pump 19 extracts water from the water tank 3 to solve the problem of sudden pressure drop in the system caused by a large amount of water shortage; the water tank 3 is connected through a safety valve 7 to solve unsafe factors such as sudden increase in system pressure caused by abnormal conditions; the filter 23 and the power pump 13 are both set in parallel in pairs, and are equipped with an ATS dual-power control cabinet 18, so as to achieve a redundant design that does not shut down when key components are damaged and does not lose power in special circumstances, and can achieve non-stop maintenance or replacement, avoiding the risk of data center downtime. And by adjusting the opening and closing size of the proportional control valve 6, the supply adjustment of the primary side cooling capacity is achieved, which can be applied to the heat exchange of a wide range of secondary side water-cooling media, with a wide range of applications and good practicality.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0056] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0057] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A CDU liquid cooling data center water cooling system, comprising a frame body (1), It is characterized in that An ATS dual power supply control cabinet (18), a PLC control cabinet (31), a plate heat exchanger (17), and a primary water inlet pipe fitting, a primary water return pipe fitting, a secondary water inlet pipe fitting, and a secondary water return pipe fitting connected to the plate heat exchanger (17) are installed in the frame body (1); A primary water inlet (20) and two filters (23) connected in parallel are installed on the primary water inlet pipe; A proportional regulating valve (6) and a primary water return port (21) are installed on the primary water return pipe. A secondary water outlet (10) and two filters (23) connected in parallel are installed on the secondary water inlet pipe; A degassing tank (8), a safety valve (7), a secondary water return port (11) and two parallel power pumps (13) are installed on the secondary water return pipe; the upper side of the degassing tank (8) is connected to an expansion tank (2), the lower side of the degassing tank (8) is connected to a water tank (3), and a system water supply pump (19) is provided between the water tank (3) and the degassing tank (8); the safety valve (7) is connected to the water tank (3); Butterfly valves (12) are respectively installed at both ends of the filter (23); The primary water inlet (20) and the primary water return port (21) are connected to an external cold water supply system; the secondary water outlet (10) and the secondary water return port (11) are connected to a server water cooling system.

2. The CDU liquid cooling data center water cooling system according to claim 1, It is characterized in that There are two expansion tanks (2), which are installed in parallel on the upper side of the degassing tank (8).

3. The CDU liquid cooling data center water cooling system according to claim 1, It is characterized in that It also includes a water tank replenishment pump (22) connected to the upper side of the water tank (3).

4. The CDU liquid cooling data center water cooling system according to claim 3, It is characterized in that The outlet end of the water tank replenishment pump (22) is connected to the bottom of the degassing tank (8) through a pipeline and is provided with a switch valve.

5. The CDU liquid cooling data center water cooling system according to claim 3, It is characterized in that A liquid level sensor (27) is provided on the side of the water tank (3).

6. The CDU liquid cooling data center water cooling system according to claim 1, It is characterized in that The upper side of the degassing tank (8) is also connected to an exhaust valve (4).

7. The CDU liquid cooling data center water cooling system according to claim 1, It is characterized in that One end of the primary water inlet pipe close to the primary water inlet (20) is connected and installed with a temperature sensor (25) and a pressure sensor (26); one end of the primary water return pipe close to the primary water return (21) is connected and installed with a flow meter (9), a temperature sensor (25) and a pressure sensor (26); one end of the secondary water inlet pipe close to the secondary water outlet (10) is connected and installed with a temperature sensor (25) and a pressure sensor (26); one end of the secondary water return pipe close to the secondary water return (11) is connected and installed with a flow meter (9), a temperature sensor (25) and a pressure sensor (26).

8. The CDU liquid cooling data center water cooling system according to claim 1, It is characterized in that The secondary water inlet pipe and the secondary water return pipe are connected via a first connecting pipe, and a two-way solenoid valve (5) is installed on the first connecting pipe.

9. The CDU liquid cooling data center water cooling system according to claim 1, It is characterized in that A vibration-proof pipe (28) and a butterfly valve (12) are respectively installed on both sides of the power pump (13).

10. The CDU liquid cooling data center water cooling system according to claim 1, It is characterized in that The secondary side water inlet pipe and the secondary side water return pipe are respectively connected and installed with a conductivity sensor (15) and a PH sensor (16).

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