| abstract |
(57) Abstract: [PROBLEMS] To provide a refrigerating device using an HFC-based refrigerant, which can prevent a decompression mechanism from causing a defect such as clogging and thereby improve its reliability. An HFC-based refrigerant is used as a refrigerant of a refrigeration system. As the refrigerating machine oil, synthetic oil such as ester oil, ether oil, etc. is used as a basic component, and a fluorine-based oil is mixed with this as an additive. Further, this fluorinated oil is composed by mixing a high viscosity type and a low viscosity type. |