Gaseous nitrogen temperature adjusting unit for heat sink temperature adjusting system

Abstract

The invention discloses a gaseous nitrogen temperature adjusting unit. The gaseous nitrogen temperature adjusting unit mainly comprises a gaseous nitrogen fan, a system cooling liquid nitrogen sprayer, a main refrigeration liquid nitrogen sprayer, gaseous nitrogen heaters, auxiliary refrigeration liquid nitrogen sprayers and a control system; gaseous nitrogen enters the system through a gaseous nitrogen inlet, enters the gaseous nitrogen fan after being cooled by the system liquid nitrogen sprayer, enters the main refrigeration liquid nitrogen sprayer under driving of the gaseous nitrogen fan,passes through the two sets of heaters and auxiliary refrigeration liquid nitrogen sprayers which are connected in series from the main refrigeration liquid nitrogen sprayer to enter a heat sink, andthen enters the main refrigeration liquid nitrogen sprayer again after being subjected to heat exchange in the heat sink, and a complete cycle is finished. According to the gaseous nitrogen temperature adjusting unit, the heat exchange amount required by the heat sink is ensured, and the limiting temperature and control precision are easily obtained.

Description

technical field [0001] The invention belongs to the technical field of space environment simulation, and in particular relates to a gas nitrogen temperature regulation unit used in a heat sink temperature regulation system. Background technique [0002] Among the existing space environment simulation equipment in our country, most of them use liquid nitrogen refrigeration or mechanical refrigeration to provide a low temperature environment, and use solar simulators, infrared heaters, surface contact electric heating sheets and other equipment to simulate the external heat flow and temperature of satellites in orbit Variety. [0003] Although the use of solar simulators in the external environment temperature control measures has the advantages of intuition, reality, reliable data, and high test accuracy, the operating costs are expensive and the technology is difficult. To run a solar simulator, a complex motion simulator must be built at the same time. The thermal vacuum t...

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Problems solved by technology

But this method not only consumes a lot of liquid nitrogen, but also consumes a lot of electric energy, which is very uneconomical in some thermal tests of components; In the thermal vacuum test of the exposed parts of the spacecraft, sometimes the temperature of the test piece is required to be very low. Because at low temperature or cooling, all the heat radiated by the test piece must be transferred to the heat sink and finally absorbed by the heat sink. From the actual From the effect point of view, in the low temperature or cooling condition, the existence of the infrared heating device will play a certain "impediment" effect on the reduction of the temperature of the star; in addition, the use of the infrared heating device has poor adaptability to the test piece, and needs to be prepared for the test design in advance. Infrared heating device, different test pieces have different infrared devices, especially for complex shapes or small test pieces, it is difficult to design infrared heating devices

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