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CN-224218680-U - Liquid cooling system for data center

CN224218680UCN 224218680 UCN224218680 UCN 224218680UCN-224218680-U

Abstract

The utility model provides a liquid cooling system for a data center, which adopts freon as a heat exchange medium of the liquid cooling system, combines a mechanical compression refrigeration direct expansion air conditioning system (a fluorine pump system) with the liquid cooling system, realizes unification of air cooling and liquid cooling parts, has simple pipelines and low manufacturing cost, and has higher overall operation efficiency and maintenance convenience. The system has good expansibility, can be flexibly adjusted according to the outdoor temperature or the terminal load condition, and correspondingly increases or reduces the refrigerating capacity of the cold source. The compressor is not directly connected with the evaporator and the CDU plate heat exchanger, but indirectly exchanges heat through the plate heat exchanger, the design reduces the flow of a mechanical compression refrigeration loop, so that compressor lubricating oil is not easy to accumulate in the first condenser and the loop, the problem of unsmooth oil return of the compressor is avoided, the design supports the parallel expansion of the mechanical refrigeration module, and a cold source can be flexibly adjusted according to the end load.

Inventors

  • TIAN HOUKUAN
  • YANG KAI
  • TIAN JUN

Assignees

  • 南京佳力图机房环境技术股份有限公司

Dates

Publication Date
20260508
Application Date
20250210

Claims (8)

  1. 1. The liquid cooling system for the data center comprises a data center cabinet array, a mechanical refrigeration compression loop and a fluorine pump circulation loop, wherein the mechanical refrigeration compression loop and the fluorine pump circulation loop are connected with the data center cabinet array, the liquid cooling system is characterized by comprising a compressor (1), a first plate heat exchanger (2), a throttling device (3) and a first condenser (4), an air outlet of the compressor (1) is connected with a first port of the first plate heat exchanger (2) through a first pipeline (20), an air outlet of the compressor (1) is connected with an air inlet of the first condenser (4) through a second pipeline (21), an air outlet of the first condenser (4) is connected with a second port of the first plate heat exchanger (2) through a third pipeline (22), and the third pipeline (22) is provided with the throttling device (3); The fluorine pump circulation loop comprises a throttling device (3), a liquid storage tank (5), a fluorine pump (6), an evaporator (7), a plate heat exchanger II (8) and a condenser II (11), wherein a liquid inlet of the liquid storage tank (5) is connected with a third port of the plate heat exchanger I (2) through a fourth pipeline (23), a liquid outlet of the liquid storage tank (5) is provided with the fluorine pump (6), the evaporator (7) is connected with the plate heat exchanger II (8) in a parallel connection mode, a first port of the evaporator (7) is connected with the fluorine pump (6) through a fifth pipeline (24), a first port of the plate heat exchanger II (8) is connected with the fluorine pump (6) through a sixth pipeline (25), the fifth pipeline (24) and the sixth pipeline (25) are both provided with the throttling device (3), and a second port of the evaporator (7) and the plate heat exchanger II (8) are connected with the fourth port of the plate heat exchanger II (26) through a seventh pipeline (26) in a confluence mode, and the fourth port of the plate heat exchanger II (26) is connected with the condenser II (11) in parallel connection mode.
  2. 2. A liquid cooling system for a data center according to claim 1, characterized in that the data center cabinet array is composed of a plurality of data center servers (9), a plurality of the data center servers (9) being connected to the third port of the plate heat exchanger two (8) through a refrigerant outlet pipe (10).
  3. 3. A liquid cooling system for a data center according to claim 2, wherein the refrigerant outlet pipes (10) are in a closed loop, and wherein the refrigerant cooling systems of the data center servers (9) are connected in parallel with each other and each communicate with the refrigerant outlet pipe (10).
  4. 4. The liquid cooling system for a data center according to claim 1, wherein the seventh pipeline (26) is provided with a three-way valve (12), three ports of the three-way valve (12) are respectively connected with the fourth port of the first plate heat exchanger (2), the second port of the second plate heat exchanger (8) and the first port of the second condenser (11), and the second port of the second condenser (11) is provided with a one-way valve (13) and is connected with the fourth port of the first plate heat exchanger (2).
  5. 5. A liquid cooling system for a data center according to claim 1, wherein a heat radiation fan (14) is arranged at one side of the first condenser (4), and the second condenser (11) is connected with the first condenser (4) by sharing the heat radiation fan (14) or an outdoor spray tower/dry cooler.
  6. 6. The liquid cooling system for a data center according to claim 2, wherein the fluorine pump (6) is configured to drive a refrigerant to circulate in the circulation loop of the fluorine pump, and to supply cold to the data center server (9), and the refrigerant is freon.
  7. 7. The liquid cooling system for a data center of claim 1, wherein the plate heat exchanger one (2) is a shell and tube heat exchanger.
  8. 8. A liquid cooling system for a data center according to claim 1, wherein the second plate heat exchanger (8) is a CDU plate heat exchanger.

Description

Liquid cooling system for data center Technical Field The utility model relates to the technical field of heat dissipation of data center cabinets, in particular to a liquid cooling system for a data center. Background With the rise of high-performance computing technologies such as a large-scale language model (LLM), the server heating density of a data center is remarkably improved, and the traditional full-air cooling system cannot meet the heat dissipation requirement. At present, the cooling technology of the data center mainly comprises an all-air cooling system, a liquid cooling and air cooling system and a small amount of all-liquid cooling system. The liquid cooling and air cooling system generally uses a liquid cooling system to realize heat dissipation of a CPU and a GPU in a server, and the air cooling system realizes heat dissipation of a hard disk, a memory, a power distribution system and a network switch. The liquid cooling system generally takes deionized water or glycol and propylene glycol aqueous solution as heat exchange medium, and is conveyed by a pipe network, and the air cooling system needs to adopt a Freon system. In the prior art, the air cooling system and the liquid cooling system are simultaneously applied to the data center, but independent layout and independent operation and maintenance are usually required, so that the maintenance of the system becomes very difficult, and the complexity of pipeline arrangement and the manufacturing cost of the system are increased. In addition, because the heat generation density of the more complex data center server of the air cooling system cannot be fully dealt with, especially with the rise of a large-scale language model (LLM), the heat generation amount of the server of the data center is obviously increased, so that the requirement of efficient heat dissipation of the full air cooling system cannot be met. Disclosure of utility model The utility model provides a liquid cooling system for a data center, which combines a direct expansion air conditioning system (a fluorine pump system) with the liquid cooling system, so that the air cooling and liquid cooling part use the same set of system, simultaneously, the distribution of refrigerant is optimized, the design of the whole system is simplified, the maintenance cost is reduced, and the whole cooling efficiency is improved. In order to achieve the above purpose, the utility model adopts the following technical scheme: The liquid cooling system for the data center comprises a data center cabinet array, a mechanical refrigeration compression loop and a fluorine pump circulation loop, wherein the mechanical refrigeration compression loop and the fluorine pump circulation loop are connected with the data center cabinet array, and the liquid cooling system is characterized by comprising a compressor, a plate heat exchanger I, a throttling device and a condenser I, wherein an air outlet of the compressor is connected with a first port of the plate heat exchanger I through a first pipeline, an air outlet of the compressor is connected with an air inlet of the condenser I through a second pipeline, an air outlet of the condenser I is connected with a second port of the plate heat exchanger I through a third pipeline, and the throttling device is arranged on the third pipeline; The fluorine pump circulation loop comprises a throttling device, a liquid storage tank, a fluorine pump, an evaporator, a plate heat exchanger II and a condenser II, wherein a liquid inlet of the liquid storage tank is connected with a third port of the plate heat exchanger I through a fourth pipeline, a liquid outlet of the liquid storage tank is provided with the fluorine pump, the evaporator is connected with the plate heat exchanger II in a parallel mode, a first port of the evaporator is connected with the fluorine pump through a fifth pipeline, a first port of the plate heat exchanger II is connected with the fluorine pump through a sixth pipeline, throttling devices are arranged on the fifth pipeline and the sixth pipeline, a second port of the evaporator and the plate heat exchanger II are converged and are connected with a fourth port of the plate heat exchanger I through a seventh pipeline, and the condenser II is arranged in parallel with the seventh pipeline. As a further preferred aspect of the present utility model, the data center cabinet array is composed of a plurality of data center servers, and the plurality of data center servers are connected to the third port of the second plate heat exchanger through a refrigerant outlet pipe. As a further preferred aspect of the utility model, the refrigerant outlet pipes are in a closed loop, and the data center server refrigerant cooling systems are connected in parallel with each other and are all communicated with the refrigerant outlet pipes. In a further preferred aspect of the present utility model, the seventh pipeline is provided with a three-way valv