REFRIGERATION AIR CONDITIONING DEVICE AND HERMETIC TYPE ELECTRIC COMPRESSOR USED FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To reduce a sealed refrigerant amount while using a fire-retardant refrigerant which has a low global warming coefficient.;MEANS FOR SOLVING THE PROBLEM: A refrigeration air conditioning device constitutes a refrigeration cycle in which a hermetic type electric compressor having a compression mechanism part, an electric motor part and an oil reservoir part in a hermetic container, an outdoor side heat exchanger, an expansion valve, an indoor side heat exchanger are connected by a refrigerant pipeline sequentially. It also includes: an oil separator provided on the discharge side of the hermetic type electric compressor, and for separating oil from a refrigerant; and an oil return pipeline for returning the oil from the oil separator to the oil reservoir part of the hermetic type electric compressor. The refrigerant circulating in the refrigeration cycle is a mixed refrigerant which includes at least one type of hydrofluorocarbon (HFC), and trifluoroiodomethane (CF3I), and a refrigeration oil used for the hermetic type electric compressor is an oil incompatible to the mixed refrigerant.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2020,JPO&INPIT