To determine the performance of a constant temperature and humidity test chamber, cooling is an important part. Generally speaking, the cooling methods are mechanical refrigeration and auxiliary liquid nitrogen refrigeration, and mechanical compression uses vapor compression refrigeration. It includes four major components: compressor, condenser, throttle device and evaporator. The compressor is the heart of the refrigeration system. It sucks in low-temperature and low-pressure gas, turns it into a high-temperature and high-pressure gas, releases heat by condensing into a liquid, and takes away the heat through the fan. , Secondly, it becomes a low-temperature and low-pressure gas through the evaporator and finally returns to the compressor; the refrigerant absorbs heat in the evaporator to complete the gasification process and absorbs heat to achieve the purpose of cooling, and completes the temperature reduction process of the constant temperature and humidity test chamber.

The refrigeration system of the constant temperature and humidity test chamber is composed of two parts, called high temperature part and low temperature part, each part is a relatively independent refrigeration system. The evaporation of the refrigerant in the high temperature part absorbs the heat from the refrigerant in the low temperature part and vaporizes; the evaporation of the refrigerant in the low temperature part absorbs heat from the object to be cooled (air in the test chamber) to obtain the cooling capacity. The high temperature part and the low temperature part are connected by an evaporative condenser, which is both the condenser of the high temperature part and the condenser of the low temperature part. National Free Service Hotline

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