| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerant oil composition having high compatibility with a solvent and comprehensively more excellent in such as high electrical insulating property, low hygroscopicity, solubility to contaminants, resistance to hydrolysis, oil returnability, etc., and to provide a high performance working fluid for refrigerator containing the refrigerant oil composition and HFC solvents, and to provide high performance heat pump type machines such as an air conditioner and hot-water supply apparatus, etc. SOLUTION: The refrigerant oil composition comprises (A) 30-60 mass% of a naphthene-based mineral oil, (B) 40-70 mass% of a polyol ester oil. The working fluid comprises the oil composition for refrigerator and (C) a hydrofluorocarbon refrigerant composed of hydrogen, carbon and fluorine or (D) carbon dioxide refrigerant. The refrigerating system using the above fluid as its working fluid. The heat pump type machines provided with the refrigerating system and carrying out air conditioning and hot-water supplying are also provided. COPYRIGHT: (C)2008,JPO&INPIT |
