Retrofit equipment and retro-fit method of refrigeration cycle

摘要

PURPOSE: To provide a retro-fit device of a refrigeration cycle which is excellent in workability and work efficiency and high reliability and its retro-fit method. ;CONSTITUTION: A retro-fit device for removing a refrigerator oil from a refrigeration cycle comprises an oil separator 17 which is laid out in a series in a high pressure refrigerant circulating flow passage 16 between a compressor 11 and a condenser 12 and an oil return pipe 19 which returns a refrigerator oil separated from refrigerants in the oil separator 17 and a pressure reducing part which is installed to the oil return pipe 19 and reduces the pressure of a passing fluid and a first on/off valve 20 which is installed between the pressure reducing part and the oil separator 17. This device is further provided with an oil extracting pipe 21 which is branched from the oil return pipe 19 between the first on/off valve 20 and the oil separator 17 and a second on/off valve 22 which is installed to the oil extracting pipe 21.;COPYRIGHT: (C)1996,JPO