Low temperature chiller using Freon heat of evaporation cooling principle work, the pump extracts cut refrigerant from the tank to the refrigeration system heat exchanging process is performed, and then the media cooled chiller outlet road hit needs to be cooled equipment or products back to the tank after cooling, so that the continuous circulation of the working medium through the whole tank of medium temperature continues to drop, the chiller tank contained within the reaction temperature of the refrigerant in a timely manner by the temperature controller temperature sensor, the user can According to the actual work to be set to control the temperature, the temperature controller to automatically control the temperature probe cold work to ensure that the temperature is always controlled in the normal operating range.