Gravity liquid supply backflow type phase change heat transfer system with cold source

Abstract

A gravity liquid supply backflow type phase change heat transfer system with a cold source comprises a condenser, a flash tank, a plurality of evaporators, throttle valves A in one-to-one correspondence with the evaporators, a circulating pump, a compressor, throttle valves B, a gas collecting pipe and a liquid supply pipe. A liquid refrigerant outlet of the flash tank is communicated with the liquid supply pipe; refrigerant inlets of all evaporator are communicated with outlets of the throttle valves A in one-to-one correspondence with the evaporators through pipelines, and inlets of the throttle valves A are communicated with the liquid supply pipe through pipelines; a refrigerant outlet of each evaporator is communicated with the gas collecting pipe; a refrigerant inlet of the circulating pump is communicated with the gas collecting pipe, and a refrigerant outlet of the circulating pump is communicated with the liquid supply pipe; a refrigerant inlet end of the compressor is respectively communicated with the gas collecting pipe and a gaseous refrigerant outlet of the flash tank; the refrigerant outlet end of the compressor is communicated with the refrigerant inlet of the condenser; and the throttle valve B is arranged between the condenser and the flash tank.

Description

technical field [0001] The present application relates to the technical field of data center refrigeration, in particular to a gravity liquid-supply reflux type phase-change heat transfer system with its own cold source. Background technique [0002] With the development of the data center, the greater the heat, the existing computer room air conditioning system adopts the thermal management method of controlling the overall temperature of the computer room, the heat transfer temperature difference is relatively small, and the heat transfer efficiency is low. [0003] At present, the heat dissipation methods used in the information room mainly include the following types: [0004] One is precise air supply from the precision air conditioner. In this way, air ducts are used in the machine room to direct the cold air from the precision air conditioner to the server cabinet. The main advantage is that the cold air is directly directed to the server cabinet, so that the air inta...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the problems existing in the above-mentioned prior art, and provide a gravity liquid-supply backflow type phase change heat transfer system with its own cold source, which can fully utilize the combination of natural cold source and mechanical refrigeration to realize the operation of a single unit High-power heat exchange, and the accurate liquid supply of each evaporator is realized through the throttle valve. The design of the circulating pump solves the problem that the gas collecting pipe is filled with liquid refrigerant when the high-power phase change heat transfer system is shut down during operation and then turned on again. Problems that don't work

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