Back heating type gas closed circulation refrigeration heating and temperature adjustment system

Abstract

The invention relates to a back heating type gas closed circulation refrigeration heating and temperature adjustment system comprising a circulation blower, a gas emptying port, a three-channel back heating device, a water cooling heat exchanger, a liquid nitrogen flow control valve, a liquid nitrogen storage tank, a liquid nitrogen heat exchanger, a heater, a heating stop valve, a refrigeration stop valve, a general stop valve, a vaporizer, a heat sink, a sensor and a pipeline. Gas like nitrogen or air is adopted by the system to act as a circulation working medium, gas is circulated in the closed circulation system pipeline via the circulation blower. The temperature controlled component like the heat sink is cooled or heated by circulation gas. Heating temperature control is performed on gas by circulation gas via adopting the heater in high temperature circulation, and cooling temperature control is performed on gas via adopting liquid nitrogen in low temperature circulation. The back heating principle is adopted, and cooling quantity or heat quantity of gas flowing out of the temperature controlled component like the heat sink is recovered by utilizing the three-channel back heating device so that wide range of temperature adjustment from -173 DEG C to +200 DEG C can be performed on the temperature controlled component like the heat sink, and flow energy consumption and operation cost can be reduced.

Description

technical field [0001] The invention relates to a regenerative gas closed-cycle refrigeration heating temperature adjustment system. The system can be used in the temperature control system of the space environment simulation test equipment temperature environment, and can accurately control the heat sink of the environment simulation equipment from -173°C to 200°C. Temperature control; it can also be used in refrigeration, chemical industry and other fields that require heating and cooling. Background technique [0002] The space environment simulation test equipment is a device for simulating the vacuum and high and low temperature environment of outer space. The high and low temperature environment is realized by heat sink with a certain temperature through radiation heat exchange. In order to obtain a high and low temperature environment, the heat sink must be controlled at the required specific temperature, which requires the control of the heat sink temperature through...

AI Technical Summary

Problems solved by technology

However, in many cases, the temperature of the space environment simulation test needs to be varied within a very wide range from -173°C to +150°C, and it is difficult for liquid nitrogen and compression refrigeration processes to meet this demand, while nitrogen, air and other gases are used as circulating processes. It can work stably and reliably in the range of -173℃~+150℃. This is the gas temperature regulation

However, the existing gas temperature adjustment system is an open cycle, and the gas is directly discharged from the heat sink outlet to the atmosphere, which consumes a lot of cooling capacity and heating power, which is very uneconomical and has the disadvantages of low heating and cooling rates.

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