Temperature control type loop heat pipe evaporator assembly

Abstract

A temperature control type loop heat pipe evaporator assembly comprises a heat compensator, N evaporation units and a connecting pipeline, wherein the N is a positive integer bigger than or equal to 1; the heat compensator is arranged in the input end so as to heat up the liquid working medium in the loop heat pipe into gas-liquid two-phase state; the N evaporation units are connected by the connecting pipeline so as to form an evaporation network; the input end of the evaporation network is connected with the output end of the heat compensator through the connecting pipeline; the output end of the evaporation network serves as the output end of the evaporator assembly. The evaporator assembly can ensure the working medium entering each evaporation unit in the loop heat pipe operation to be two-phase working medium, thus ensuring constant and consistent temperature of the heat source in working / non working state, and accurately controlling the temperature in the complete cycle.

Description

technical field [0001] The invention belongs to the technical field of spacecraft thermal control, and relates to an evaporator assembly used for a loop heat pipe. Background technique [0002] The loop heat pipe is a two-phase fluid circuit system that uses capillary force to drive the circulation of the working fluid to transfer heat. It has the advantages of small thermal resistance, large heat transfer, long heat transfer distance, and no moving parts. It has been a popular aerospace technology in recent years. One of the high-efficiency thermal control products of the device. [0003] Generally, thermal radiation panels are used as loop heat pipe condensers in spacecraft thermal control systems. However, affected by the heat flow outside the space orbit, the temperature of the condenser changes drastically, which causes the temperature of the liquid working fluid entering the evaporator assembly and the temperature of the controlled heat source to fluctuate accordingly...

AI Technical Summary

Problems solved by technology

However, affected by the heat flow outside the space orbit, the temperature of the condenser changes drastically, which causes the temperature of the liquid working fluid entering the evaporator assembly and the temperature of the controlled heat source to fluctuate accordingly

For example, under extremely low temperature conditions, the liquid working medium entering the evaporation unit is supercooled, making the temperature of the controlled heat source lower than the index in the non-working state; and in the initial stage of the controlled heat source, due to the phase change of the supercooled liquid, a certain overcooling is required. Coldness, the liquid in the evaporator unit cannot boil in time, causing the temperature of the controlled heat source to rise rapidly, exceeding the index

That is, when the controlled heat source is not working or at the beginning of work, the temperature control accuracy cannot be effectively guaranteed, which will limit the application of the temperature control loop heat pipe in the field of precise thermal control of spacecraft (such as the temperature control of optical remote sensor CCD devices)

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