Automatic cooling heat sink framework and refrigeration method thereof

Abstract

The invention brings forward an automatic cooling heat sink framework and its refrigeration method, wherein the automatic cooling heat sink framework is used in a low-temperature flow system of space environmental-test facility. The heat sink framework contains a framework main body, a resistor temperature sensor, a liquid nitrogen supply system and a fluid discharge system. The framework main body is shaped as a horizontal cylinder formed by welding an annular pipe and a horizontal pipe and equipped with a lower liquid inlet and an upper liquid outlet, wherein liquids flow horizontally out and in; a liquid inlet pipe is connected with the liquid nitrogen supply system; a liquid outlet pipe is connected with the fluid discharge system; the resistor temperature sensor, which is disposed onthe liquid outlet pipe, is used for detecting the outlet temperature of the heat sink framework. According to the refrigeration method, the temperature of the framework main body is observed by the resistor temperature sensor and the temperature is adjusted by a liquid nitrogen supply valve of the liquid nitrogen supply system so as to finally accomplish the refrigeration of the framework main body. The refrigeration method provided by the invention is utilized to realize the automatic cooling of the heat sink framework, reduce the test cost and allow the temperature of the heat sink framework to be adjusted from 77K to 300K.

Description

technical field [0001] The invention relates to a component used in a low-temperature flow system of space environment simulation test equipment, in particular to a self-cooling heat sink frame and a refrigeration method thereof. Background technique [0002] The heat sink is an important part of the space environment simulation test equipment, mainly used to simulate the cold and dark environment of the space. At present, most of the thermal vacuum environment simulation test equipment at home and abroad use liquid nitrogen refrigeration. With the rapid development of China's aerospace technology, the demand for manned spaceflight with a large amount of air release and the demand for rocket engine plume tests, the use of liquid nitrogen refrigeration has been unable to simulate the required space. environment, it is necessary to design a liquid helium heat sink with greater cooling capacity and pumping speed. [0003] Both the liquid nitrogen heat sink and the liquid heliu...

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Problems solved by technology

[0004] The present invention aims at the problem that the current heat sink frame cannot be self-cooling, and the cooling will consume expensive liquid helium, and provides a self-cooling heat sink frame and its refrigeration method. The self-cooling heat sink frame uses liquid nitrogen as the refrigeration medium, which can The temperature of the heat sink frame can be adjusted from 77K to 300K. The self-cooling heat sink frame of the present invention can be used for liquid nitrogen heat sink support, especially for liquid helium heat sink support

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