METHOD AND SYSTEM FOR RECOVERING REFRIGERANT

摘要

PROBLEM TO BE SOLVED: To recover refrigerant CFC dissolving into refrigerating machine oil by making a hole on the lower surface side of a fixed recovering machine under negative pressure state, recovering a gas/liquid mixture of refrigerant and refrigerating machine oil and separating the refrigerant from the refrigerating machine oil. SOLUTION: A machine to be recovered 15 is fixed onto a carrier 16 by means of a fixing unit with the part exposing a compressor 12 being directed downward and the seal part 18 of a drill 3 is pressed against the compressor 12 from below. A change-over valve 7 is turned to the vacuum pump 11 side and the seal part 18 is sucked to bring about negative pressure state. Subsequently, the change-over valve 7 is turned to the refrigerant/refrigerating machine oil separator 20 side and a hole is made through the shell of the compressor 12 by means of a drill 3. Ejected gaseous refrigerant and refrigerating machine oil are introduced to the separator 20 and oil is removed from the gaseous refrigerant when it ascends through an oil mist separator 25 and then it is introduced to a gaseous refrigerant recovery unit 50. Refrigerating machine oil is heated in a tank 21 by means of a heater 29 in order to accelerate separation of refrigerant.