Refrigeration method of rapid temperature change test chamber

The rapid temperature change test chamber refrigeration methods are divided into vapor compression refrigeration, absorption refrigeration, vapor jet refrigeration, gas expansion refrigeration, and thermoelectric refrigeration. Among the above refrigeration methods, vapor compression refrigeration is the most economical and widely used refrigeration method , Is also the most commonly used refrigeration method in environmental test equipment. Its principle is to use the latent heat of vaporization of liquids such as freon to absorb heat from the object to be cooled to achieve refrigeration. A schematic diagram of the vapor compression refrigeration cycle process. The liquid throttling into the evaporator by the expansion valve absorbs the latent heat of evaporation from the surrounding objects and evaporates. After evaporation, it becomes a low-temperature and low-pressure gas that is sucked in by the refrigeration compressor. After being compressed by the compressor, it becomes a high-temperature and high-pressure gas and enters water-cooled or air-cooled condensation. Evaporator, which is cooled into high-pressure liquid, and then enters the evaporator through the expansion valve. Such a reciprocating cycle absorbs heat from the low temperature to achieve cooling, and then releases the heat from the high temperature.