| abstract |
(57) [Summary] [Purpose] Hygroscopicity and reactivity with water are reduced, deterioration of refrigeration cycle materials due to water is less likely to occur, and generation of oil sludge can be reduced. [Composition] In a refrigerating machine oil composition of a refrigerant compressor in which a compression mechanism is housed in a closed container and HFC32 alone or HFC containing HFC32 is used as a refrigerant, ester-based oil is mixed with refrigerating machine oil containing no ester group. I will do it. |