Industrial refrigerator, also called industrial refrigeration machine, industrial chillers, low temperature refrigerator for ultra low temperature freezer, The temperature range of an industrial refrigerator is generally lower than that of -20, or even lower. It is suitable for blood station, hospital, health and epidemic prevention system, scientific research institute, electronic industry, chemical medicine, biological engineering, high laboratory, military enterprise and so on. Because the required low temperature is relatively low, the consumption of power is larger. Industrial refrigerators because the required temperature is low, the refrigerants at different temperatures are different, so that it is suitable for various applicable environments. Industrial refrigerators generally use a single overlay refrigeration technology to make refrigeration, the effect of refrigeration is better, the noise is smaller, and the maintenance is more convenient.