CN-121586245-B - Thermal management system and control method

CN121586245BCN 121586245 BCN121586245 BCN 121586245BCN-121586245-B

Abstract

The application provides a heat management system and a control method, which relate to the technical field of heat management of a computing center, wherein the heat management system is used for radiating heat of a piece to be cooled of the computing center and comprises a phase-change medium heat exchange loop and a cooling liquid heat exchange loop, the phase-change medium heat exchange loop comprises an expander, a first heat exchanger and a gas-liquid separator which are sequentially connected, and the phase-change medium heat exchange loop can exchange heat with the piece to be cooled; the cooling liquid heat exchange loop comprises a cooling piece and a first heat exchanger which are sequentially connected, wherein the phase change medium heat exchange loop and the cooling liquid heat exchange loop are in heat exchange connection through the first heat exchanger. The device can avoid the waste of energy in the thermal management system, realize the recovery and the power generation of pressure energy in the gaseous phase-change medium, improve the utilization efficiency of electric energy in the computing center, and improve the heat dissipation efficiency of the part to be cooled when the phase-change medium flows in the phase-change medium heat exchange loop to cool the part to be cooled.

Inventors

ZHENG KAIYUN
TAO LIN
HUANG XIZHEN
ZHANG JIE
Shu Mengying
Chi Jiecheng
BAI JIANGTAO

Assignees

势加透博(成都)科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (5)

1. A thermal management system for dissipating heat from a part to be cooled in a computing center, comprising: The phase change medium heat exchange loop comprises an expansion machine, a first heat exchanger, a second heat exchanger, a pump and a gas-liquid separator which are sequentially connected, wherein the phase change medium heat exchange loop can exchange heat with a piece to be cooled, the phase change medium heat exchange loop further comprises a first branch, a fifth branch and a sixth branch, the first branch is connected with the expansion machine in parallel, two ends of the first branch are respectively connected with a gas-liquid separator discharge port and a first heat exchanger inlet, a compressor is arranged on the first branch, the compressor comprises a first outlet and a second outlet, the first outlet is connected with the inlet of the expansion machine through a first branch, the second outlet is connected with the inlet of the first heat exchanger through a second branch, the fifth branch is connected with the expansion machine and the first branch in parallel, two ends of the fifth branch are respectively connected with the gas-liquid separator discharge port and the first heat exchanger inlet, two ends of the sixth branch are respectively connected with a second heat exchanger outlet and the gas-liquid separator inlet, and the sixth branch is arranged on the cooling piece to be cooled; The cooling liquid heat exchange circuit comprises a cooling piece and a first heat exchanger which are sequentially connected, wherein the cooling liquid heat exchange circuit comprises a fourth branch and a bypass branch, the fourth branch is arranged between the first heat exchanger and the cooling piece and is used for carrying out heat exchange on the piece to be heated; The phase change medium heat exchange loop is in heat exchange connection with the cooling liquid heat exchange loop through the first heat exchanger, and the phase change medium heat exchange loop is in heat exchange connection with the cooling liquid heat exchange loop through the second heat exchanger.
2. The thermal management system of claim 1, wherein, The first heat exchanger comprises a first heat exchange cavity and a second heat exchange cavity which are in heat exchange connection, the first heat exchange cavity is positioned in the phase change medium heat exchange loop, and the second heat exchange cavity is positioned in the cooling liquid heat exchange loop; The second heat exchanger comprises a third heat exchange cavity and a fourth heat exchange cavity which are in heat exchange connection, the third heat exchange cavity is positioned in the phase-change medium heat exchange loop, and the fourth heat exchange cavity is positioned in the cooling liquid heat exchange loop; The phase change medium heat exchange loop is characterized in that the phase change medium flows through the third heat exchange cavity from the first heat exchange cavity and exchanges heat with the to-be-cooled piece, the cooling liquid flows through the fourth heat exchange cavity from the cooling piece and then flows to the second heat exchange cavity in the cooling liquid heat exchange loop, and the flowing directions of the phase change medium and the cooling liquid are opposite in the first heat exchanger and the second heat exchanger.
3. The thermal management system of claim 2, wherein the phase change medium heat exchange circuit comprises: The two ends of the second branch are respectively connected with the liquid outlet of the gas-liquid separator and the liquid inlet of the second heat exchanger, and the liquid outlet is arranged on the second branch; And/or the number of the groups of groups, And the two ends of the third branch are respectively connected with the outlet of the first heat exchanger and the inlet of the gas-liquid separator.
4. The thermal management system of claim 1, wherein the phase change medium heat exchange circuit comprises: The liquid supplementing box is connected with the sixth branch and is used for supplementing liquid to the phase change medium heat exchange loop; The expansion tank is connected with the sixth branch and is used for buffering the pressure of the phase change medium heat exchange loop; The pump and the filter are sequentially arranged on the sixth branch; The first frequency converter is electrically connected with the pump; The second frequency converter is electrically connected with the compressor; The grid-connected device is electrically connected with the expander; And the other parts of the thermal management system except the part of the sixth branch, the cooling piece, the fourth branch and the bypass branch are integrated in the box body.
5. A control method is characterized by being applied to the thermal management system of claim 1, and further comprising a third branch and a second branch, wherein two ends of the second branch are respectively connected with a liquid outlet of the gas-liquid separator and a liquid inlet of the second heat exchanger, two ends of the third branch are respectively connected with an outlet of the first heat exchanger and an inlet of the gas-liquid separator, and the control method comprises the following modes: In a first mode, controlling the conduction of a fifth branch and a bypass branch, wherein a phase change medium sequentially flows through the fifth branch, a first heat exchanger, a second heat exchanger, a sixth branch and a gas-liquid separator in the phase change medium heat exchange loop, and a cooling liquid sequentially flows through the cooling piece, the second heat exchanger, the first heat exchanger and the bypass branch in the cooling liquid heat exchange loop; in a second mode, controlling the opening of an expansion machine and the conduction of the bypass branch, wherein a phase change medium sequentially flows through the expansion machine, the first heat exchanger, the second heat exchanger, the sixth branch and the gas-liquid separator in the phase change medium heat exchange loop, and a cooling liquid sequentially flows through the cooling piece, the second heat exchanger, the first heat exchanger and the bypass branch in the cooling liquid heat exchange loop; in a third mode, controlling the opening of an expander and a compressor and controlling the conduction of the bypass branch, wherein a phase change medium sequentially flows through the compressor, the expander, the first heat exchanger, the second heat exchanger, the sixth branch and the gas-liquid separator in the phase change medium heat exchange loop; And in the phase change medium heat exchange loop, the phase change medium sequentially flows through the compressor, the first heat exchanger, the second heat exchanger, the sixth branch and the gas-liquid separator, and/or the phase change medium sequentially flows through the compressor, the first heat exchanger, the third branch, the gas-liquid separator, the second branch, the second heat exchanger, the sixth branch and the gas-liquid separator, and the cooling liquid sequentially flows through the cooling piece, the second heat exchanger, the first heat exchanger and the fourth branch.

Description

Thermal management system and control method Technical Field The application relates to the technical field of thermal management of a computing center, in particular to a thermal management system and a control method. Background With the rapid development of the artificial intelligence industry, the computing center becomes a new engine in the information age. The scale of the artificial intelligent computing center is far greater than that of a traditional data center, the integration level of a server is continuously improved, the power density of a chip is greatly increased, the energy consumption of the computing center is huge, the traditional air cooling heat dissipation mode is difficult to meet the high computing power requirement, and the green low-carbon development of the computing center can be met only by adopting a liquid cooling technology. Therefore, the cooling method is used for radiating the to-be-cooled piece of the computing center, but the heat exchange function of the cooling liquid heat exchange loop connected with the cold source and the cooling liquid heat exchange loop connected with the to-be-cooled piece in the prior art is only realized by the heat management system, so that the recovery and the utilization of the rest energy in the heat management system cannot be realized, the energy waste in the heat management system is caused, and especially the utilization efficiency of the electric energy of the computing center cannot be further improved, and the adverse effect is generated on the green low-carbon development of the computing center. Disclosure of Invention In view of the above, the present application provides a thermal management system, which solves the problems of poor power utilization efficiency of the computing center and energy waste in the thermal management system caused by heat dissipation of the to-be-cooled piece of the computing center by the thermal management system. The application also provides a control method suitable for the thermal management system. In order to achieve the above purpose, the present application provides the following technical solutions: a thermal management system for dissipating heat from a part to be cooled of a computing force center, comprising: The phase-change medium heat exchange loop comprises an expander, a first heat exchanger and a gas-liquid separator which are sequentially connected, and the phase-change medium heat exchange loop can exchange heat with the piece to be cooled; the cooling liquid heat exchange loop comprises a cooling piece and the first heat exchanger which are connected in sequence; the phase change medium heat exchange loop and the cooling liquid heat exchange loop are in heat exchange connection through the first heat exchanger. Optionally, the phase change medium heat exchange loop further comprises a first branch connected with the expander in parallel, and a compressor is arranged on the first branch. Optionally, the compressor includes a first outlet and a second outlet, the first outlet is connected with the air inlet of the expander through a first branch pipe, and the second outlet is connected with the air inlet of the first heat exchanger through a second branch pipe. Optionally, the phase-change medium heat exchange loop further comprises a second heat exchanger arranged between the first heat exchanger and the gas-liquid separator, and the phase-change medium heat exchange loop and the cooling liquid heat exchange loop are in heat exchange connection through the second heat exchanger. Alternatively to this, the method may comprise, The first heat exchanger comprises a first heat exchange cavity and a second heat exchange cavity which are in heat exchange connection, the first heat exchange cavity is positioned in the phase change medium heat exchange loop, and the second heat exchange cavity is positioned in the cooling liquid heat exchange loop; The second heat exchanger comprises a third heat exchange cavity and a fourth heat exchange cavity which are in heat exchange connection, the third heat exchange cavity is positioned in the phase-change medium heat exchange loop, and the fourth heat exchange cavity is positioned in the cooling liquid heat exchange loop; The phase change medium heat exchange loop is characterized in that the phase change medium flows through the third heat exchange cavity from the first heat exchange cavity and exchanges heat with the to-be-cooled piece, the cooling liquid flows through the fourth heat exchange cavity from the cooling piece and then flows to the second heat exchange cavity in the cooling liquid heat exchange loop, and the flowing directions of the phase change medium and the cooling liquid are opposite in the first heat exchanger and the second heat exchanger. Optionally, the phase change medium heat exchange circuit includes: The two ends of the second branch are respectively connected with the liquid outlet of the gas-liquid separator and the