Distributed cooling liquid cooling system

Abstract

The utility model relates to a liquid cooling system for distributed cooling, which comprises a plurality of cold plate groups, a secondary pump, a switching valve, a liquid flow distribution control module, a cooling water heat exchange module and a constant-pressure water replenishing module, the liquid outlet ends of the multiple cold plate sets communicate with the return water inlet end of the liquid flow distribution control module, the return water outlet end of the liquid flow distribution control module communicates with the water inlet end of the cooling water heat exchange module, and the water outlet end of the cooling water heat exchange module communicates with the water supply inlet end of the liquid flow distribution control module. A water supply outlet end of the liquid flow distribution control module is communicated with one ends of the switching valves, the other ends of the switching valves are communicated with a water inlet of the secondary pump, a water outlet of the secondary pump is communicated with a liquid inlet end of the cold plate group, and a liquid outlet end of the constant-pressure water replenishing module is communicated with a water supply inlet end of the liquid flow distribution control module. The proportion of the CDU to the space of a machine room is reduced, and differential pressure control and adjustment are finer.

Description

Technical Field

[0001] The utility model relates to the field of data center cooling systems, and in particular to a distributed cooling liquid cooling system. Background Art

[0002] In the existing cold plate liquid cooling system, whether it is a mining machine liquid cooling system or a general cold plate liquid cooling server cold plate liquid cooling system, the internal structure layout of the CDU (cold capacity distribution unit) is relatively complex at present. In a limited space, multiple components such as a plate heat exchanger, a water supply tank, a constant pressure device, a secondary pump, and a pressure difference regulating device are integrated; the plate heat exchanger is brazed and cannot be disassembled for maintenance. At the same time, the current cold plate liquid cooling design and the internal structure of the CDU use a constant pressure method of a pressure tank, and the water supply method is not completely automatic. A constant pressure water supply device needs to be integrated internally. This method occupies too much IT machine defense space and is not conducive to the optimization of pipeline resistance. At the same time, such a pressure difference control and adjustment method is not refined enough. Under the conditions of unbalanced terminal load and low load rate, the water pump energy consumption inside the CDU is seriously wasted, and it is inconvenient to maintain in the computer room, resulting in high costs. Utility Model Content

[0003] In order to overcome the shortcomings of existing products and technologies, the utility model provides a liquid cooling system with distributed cooling, which integrates the plate heat exchanger inside the CDU into an indirect evaporative cooling tower, and uses an expansion constant-pressure pure water tank outside the computer room to achieve constant-pressure water replenishment and ensure the quality of replenishment water. At the same time, distributed water supply is used inside the computer room, and the difficulty of adjusting the secondary pump is reduced by arranging a secondary pump and a switching valve for each cabinet.

[0004] The technical solution of the implementation case of the utility model is as follows:

[0005] A distributed cooling liquid cooling system comprises a plurality of cold plate groups, a plurality of secondary pumps, a plurality of switching valves, a liquid flow distribution control module, a cooling water heat exchange module, and a constant pressure water replenishment module, wherein the cold plate group comprises a plurality of cold plates, and the plurality of cold plates are closely connected with a plurality of servers in a plurality of liquid cooling cabinets, and the plurality of secondary pumps and the switching valves correspond to the plurality of cold plate groups one by one, and the liquid outlet ends of the plurality of cold plate groups are connected with the return water inlet end of the liquid flow distribution control module through a pipeline, and the return water outlet end of the liquid flow distribution control module is connected with the water inlet end of the cooling water heat exchange module through a pipeline, and the water outlet end of the cooling water heat exchange module is connected with the liquid flow distribution control module through a pipeline. The water supply inlet end of the control module is connected, the water supply outlet end of the liquid flow distribution control module is connected with one end of the multiple switching valves through a pipeline, the other end of the multiple switching valves is connected with the water inlet of the multiple secondary pumps through a pipeline, the water outlet of the multiple secondary pumps is connected with the liquid inlet end of the multiple cold plate groups through a pipeline, the liquid outlet end of the constant pressure water replenishment module is connected with the water supply inlet end of the liquid flow distribution control module through a pipeline, the multiple secondary pumps, the multiple switching valves, and the liquid flow distribution control module are arranged in the machine room, the constant pressure water replenishment module and the cooling water heat exchange module are arranged outside the machine room, and the multiple secondary pumps are electrically connected to the liquid flow distribution control module.

[0006] Preferably, the constant-pressure water replenishment module includes an online pure water treatment device, an expansion constant-pressure pure water tank, a breathing valve, and a pressure detection gauge. The water inlet end of the online pure water treatment device is connected to the municipal water supply network through a pipe, and the water outlet end of the online pure water treatment device is connected to the water inlet of the expansion constant-pressure pure water tank through a pipe. The water outlet of the expansion constant-pressure pure water tank is connected to the water supply inlet end of the liquid flow distribution control module through a pipe. The breathing valve is arranged at the vent of the expansion constant-pressure pure water tank, and the pressure detection gauge is located at the pipe at the water supply inlet end of the liquid flow distribution control module.

[0007] Preferably, the cooling water heat exchange module includes a first cooling pump, a second cooling pump, a plate heat exchanger, and a cooling tower. The water inlet of the first cooling pump is connected to the return water outlet of the liquid flow distribution control module through a pipeline, the water outlet of the first cooling pump is connected to the hot end inlet of the plate heat exchanger through a pipeline, the hot end outlet of the plate heat exchanger is connected to the water supply inlet of the liquid flow distribution control module through a pipeline, the cold end outlet of the plate heat exchanger is connected to the water inlet of the cooling tower through a pipeline, the water outlet of the cooling tower is connected to the water inlet of the second cooling pump through a pipeline, and the water outlet of the second cooling pump is connected to the cold end inlet of the plate heat exchanger through a pipeline.

[0008] Preferably, the cooling tower is an indirect evaporative open cooling tower with a precooling function.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] By integrating the plate heat exchanger inside the original CDU with the external cooling tower, the space size of the CDU is greatly reduced. By adopting an expansion constant-pressure pure water tank, constant-pressure water replenishment is achieved, which not only ensures the water quality of the replenishment, but also further reduces the space occupancy of the CDU. By adopting distributed water supply at the end of the computer room, the secondary pump only needs the pipeline-related resistance and flow requirements of a single cabinet. Since the load rate variation range within a single cabinet is not large, the difficulty of adjusting the secondary pump is greatly reduced, and the accuracy of the supply and return water temperature difference of each cabinet is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the principle of a distributed cooling liquid cooling system in the utility model;

[0012] Figure 2 It is a schematic diagram of the principle of a constant pressure water replenishment module in a distributed cooling liquid cooling system in the utility model;

[0013] Figure 3 It is a schematic diagram of the principle of a cooling and heat exchange module in a distributed cooling liquid cooling system in the utility model;

[0014] 10. Computer room; 11. Cold plate group; 12. Secondary pump; 13. Switching valve; 14. Liquid flow distribution control module; 15. Server; 20. Cooling water heat exchange module; 21. First cooling pump; 22. Second cooling pump; 23. Plate heat exchanger; 24. Cooling tower; 30. Constant pressure water supply module; 31. Pure water online treatment device; 32. Expansion constant pressure pure water tank; 33. Breathing valve; 34. Pressure test gauge. DETAILED DESCRIPTION

[0015] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0016] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0018] like Figure 1 As shown, Figure 1 Schematic diagram of the principle of a distributed cooling liquid cooling system in the utility model; a distributed cooling liquid cooling system, including multiple cold plate groups 11, multiple secondary pumps 12, multiple switching valves 13, a liquid flow distribution control module 14, a cooling water heat exchange module 20, and a constant pressure water replenishment module 30, the cold plate group 11 includes multiple cold plates, multiple cold plates are tightly connected with multiple servers 15 in multiple liquid cooling cabinets, multiple secondary pumps 12, the switching valves 13 correspond to multiple cold plate groups 11 one by one, the liquid outlet ends of the multiple cold plate groups 11 are connected to the return water inlet end of the liquid flow distribution control module 14 through a pipeline, the return water outlet end of the liquid flow distribution control module 14 is connected to the water inlet end of the cooling water heat exchange module 20 through a pipeline, and the water outlet end of the cooling water heat exchange module 20 is connected to the water outlet end of the cooling water heat exchange module 20 through a pipeline. The pipeline is connected to the water supply inlet end of the liquid flow distribution control module 14, the water supply outlet end of the liquid flow distribution control module 14 is connected to one end of the multiple switching valves 13 through the pipeline, the other end of the multiple switching valves 13 is connected to the water inlet of the multiple secondary pumps 12 through the pipeline, the water outlet of the multiple secondary pumps 12 is connected to the liquid inlet end of the multiple cold plate groups 11 through the pipeline, the liquid outlet end of the constant pressure water replenishment module 30 is connected to the water supply inlet end of the liquid flow distribution control module 14 through the pipeline, the multiple secondary pumps 12, the multiple switching valves 13, and the liquid flow distribution control module 14 are arranged in the machine room 10, the constant pressure water replenishment module 30 and the cooling water heat exchange module 20 are arranged outside the machine room 10, and the multiple secondary pumps 12 are electrically connected to the liquid flow distribution control module 14.

[0019] The utility model disassembles and optimizes the structural arrangement of the traditional CDU (cold distribution unit) in the liquid cooling system. The previous CDU occupies too much space in the computer room due to the presence of large-space plate changers, constant pressure tanks and various pipelines, making the utilization rate of the computer room too low. In order to reduce the proportion of CDU in the computer room in the liquid cooling system, the utility model provides a liquid cooling system with a smaller computer room occupancy, while also improving the precision of pressure difference control, which is more energy-efficient than the traditional liquid cooling system.

[0020] The liquid flow distribution control module in the utility model controls the corresponding secondary pump and switching valve in each cabinet. It controls the switch of the secondary pump of each cabinet and the speed and flow of the secondary pump according to the temperature of each cabinet. It also collects the cold sources input from the outside and then delivers them to each branch pipe, and then delivers them to the cold plate group in each cabinet through the secondary pump. It also collects the cooling water output by each secondary pump and delivers them to the cooling water heat exchange module. Since the liquid flow distribution control module only undertakes the control and manifold functions, its space is much smaller than that of the traditional CDU.

[0021] The external cooling water heat exchange module collects the cooling water through the liquid flow distribution control module, and transports it to each branch pipe through the delivery main pipe. The secondary pump of the corresponding branch pipe transports the cooling water of the corresponding flow rate to the corresponding cabinet according to demand. After the cold plate in the cabinet exchanges heat, the heated cooling water is collected in the liquid flow distribution control module through multiple branches, and then transported to the external cooling water heat exchange module together to complete the heat exchange, and the cycle continues.

[0022] Since each cabinet is equipped with a distributed secondary pump, the flow rate of the secondary pump can be accurately controlled by the temperature in the cabinet. Compared with the previous high-power water pump that delivers water to each cabinet, which causes a large temperature difference between the supply and return water, it improves the accuracy and reduces the overall power consumption.

[0023] In order to maintain the water pressure and temperature of the cooling water delivered to the machine room, preferably, the constant-pressure water replenishment module 30 includes an online pure water treatment device 31, an expansion constant-pressure pure water tank 32, a breathing valve 33, and a pressure detection gauge 34. The water inlet end of the online pure water treatment device 31 is connected to the municipal water supply network through a pipeline, and the water outlet end of the online pure water treatment device 31 is connected to the water inlet of the expansion constant-pressure pure water tank 32 through a pipeline, and the water outlet of the expansion constant-pressure pure water tank 32 is connected to the water supply inlet end of the liquid flow distribution control module 14 through a pipeline. The breathing valve 33 is arranged at the vent of the expansion constant-pressure pure water tank 32, and the pressure detection gauge 34 is located at the pipeline at the water supply inlet end of the liquid flow distribution control module 14.

[0024] Due to the evaporation of water, the circulating water in the system will gradually become less. At the same time, due to the temperature fluctuation in the machine room, the volume of circulating water will become less when the temperature is low. These situations require external water replenishment and pressure setting. In order to prevent external water from polluting the clean water in the system and causing blockage in the system pipeline, the water replenishment of the utility model comes from the pure water produced by the pure water online treatment device. The pure water online treatment device treats the municipal tap water and processes it into pure water and stores it in the expansion constant pressure pure water tank. The expansion constant pressure pure water tank is placed at a high position. The water pressure generated by the high position overcomes the water pressure in the pipeline. When the air pressure in the expansion constant pressure pure water tank is too high, a vent is required to discharge it. In order to ensure that the outside air enters and pollutes the pure water, the utility model adopts a breathing valve dedicated to the drinking water pure water tank to ensure the quality of the pure water. When the pressure detector detects that the water pressure in the pipeline is low, the expansion constant pressure pure water tank will release pure water to replenish the system pipeline.

[0025] As for the specific form in which the cooling water heat exchange module realizes cooling water heat exchange, preferably, the cooling water heat exchange module 20 includes a first cooling pump 21, a second cooling pump 22, a plate heat exchanger 23, and a cooling tower 24. The water inlet of the first cooling pump 21 is connected to the return water outlet of the liquid flow distribution control module 14 through a pipeline, the water outlet of the first cooling pump 21 is connected to the hot end inlet of the plate heat exchanger 23 through a pipeline, the hot end outlet of the plate heat exchanger 23 is connected to the water supply inlet of the liquid flow distribution control module 14 through a pipeline, the cold end outlet of the plate heat exchanger 23 is connected to the water inlet of the cooling tower 24 through a pipeline, the water outlet of the cooling tower 24 is connected to the water inlet of the second cooling pump 22 through a pipeline, and the water outlet of the second cooling pump 22 is connected to the cold end inlet of the plate heat exchanger 23 through a pipeline.

[0026] The cooling tower and plate heat exchanger are used to exchange heat with the high-temperature cooling water transported in the machine room. The heated cooling water is pumped out from the liquid flow distribution control module through the second cooling pump and sent to the plate heat exchanger. At the same time, the low-temperature cooling water in the cooling tower is pumped and transported to the plate heat exchanger through the first cooling pump, and performs sensible heat exchange with the heated cooling water in the machine room in the plate heat exchanger. The heated cooling water in the machine room exchanges heat and cools down and is sent back to the machine room. The low-temperature cooling water in the cooling tower exchanges heat and heats up, and is sent back to the cooling tower for cooling, and the cycle continues.

[0027] Preferably, the cooling tower 24 is an indirect evaporative open cooling tower with a precooling function.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] By integrating the plate heat exchanger inside the original CDU with the external cooling tower, the space size of the CDU is greatly reduced. By adopting an expansion constant-pressure pure water tank, constant-pressure water replenishment is achieved, which not only ensures the water quality of the replenishment, but also further reduces the space occupancy of the CDU. By adopting distributed water supply at the end of the computer room, the secondary pump only needs the pipeline-related resistance and flow requirements of a single cabinet. Since the load rate variation range within a single cabinet is not large, the difficulty of adjusting the secondary pump is greatly reduced, and the accuracy of the supply and return water temperature difference of each cabinet is improved.

[0030] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A distributed cooling liquid cooling system, characterized in that: It includes multiple cold plate groups, multiple secondary pumps, multiple switching valves, a liquid flow distribution control module, a cooling water heat exchange module, and a constant pressure water replenishment module. The cold plate group includes multiple cold plates, and the multiple cold plates are tightly connected to multiple servers in multiple liquid cooling cabinets. The multiple secondary pumps and the switching valves correspond to the multiple cold plate groups one by one. The liquid outlet ends of the multiple cold plate groups are connected to the return water inlet ends of the liquid flow distribution control module through pipelines, and the return water outlet end of the liquid flow distribution control module is connected to the water inlet end of the cooling water heat exchange module through pipelines. The water outlet end of the cooling water heat exchange module is connected to the water supply inlet end of the liquid flow distribution control module through pipelines. The ends are connected, the water supply and outlet ends of the liquid flow distribution control module are connected with one ends of the multiple switching valves through a pipeline, the other ends of the multiple switching valves are connected with the water inlets of the multiple secondary pumps through pipelines, the water outlets of the multiple secondary pumps are connected with the liquid inlet ends of the multiple cold plate groups through pipelines, the liquid outlet end of the constant pressure water replenishment module is connected with the water supply and inlet end of the liquid flow distribution control module through a pipeline, the multiple secondary pumps, the multiple switching valves, and the liquid flow distribution control module are arranged in the machine room, the constant pressure water replenishment module and the cooling water heat exchange module are arranged outside the machine room, and the multiple secondary pumps are electrically connected to the liquid flow distribution control module.

2. A distributed cooling liquid cooling system according to claim 1, characterized in that: The constant-pressure water replenishment module includes an online pure water treatment device, an expansion constant-pressure pure water tank, a breathing valve, and a pressure detection gauge. The water inlet end of the online pure water treatment device is connected to the municipal water supply network through a pipeline, and the water outlet end of the online pure water treatment device is connected to the water inlet of the expansion constant-pressure pure water tank through a pipeline. The water outlet of the expansion constant-pressure pure water tank is connected to the water supply inlet end of the liquid flow distribution control module through a pipeline. The breathing valve is arranged at the vent hole of the expansion constant-pressure pure water tank, and the pressure detection gauge is located at the pipeline of the water supply inlet end of the liquid flow distribution control module.

3. A distributed cooling liquid cooling system according to claim 2, characterized in that: The cooling water heat exchange module includes a first cooling pump, a second cooling pump, a plate heat exchanger, and a cooling tower. The water inlet of the first cooling pump is connected to the return water outlet of the liquid flow distribution control module through a pipeline, the water outlet of the first cooling pump is connected to the hot end inlet of the plate heat exchanger through a pipeline, the hot end outlet of the plate heat exchanger is connected to the water supply inlet of the liquid flow distribution control module through a pipeline, the cold end outlet of the plate heat exchanger is connected to the water inlet of the cooling tower through a pipeline, the water outlet of the cooling tower is connected to the water inlet of the second cooling pump through a pipeline, and the water outlet of the second cooling pump is connected to the cold end inlet of the plate heat exchanger through a pipeline.

4. A distributed cooling liquid cooling system according to claim 3, characterized in that: The cooling tower is an indirect evaporative open cooling tower with a precooling function.

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