| abstract |
The present invention relates to a refrigerator that uses various refrigerants such as saturated or unsaturated fluorinated hydrocarbons, carbon dioxide, hydrocarbons, and ammonia, which have a low global warming potential and can be used in, for example, current car air conditioner systems. A lubricating oil composition for a refrigerator having excellent stability is provided. The refrigerating machine oil composition of the present invention comprises 4,4'-methylenebis (2,6-di-t-butyl-phenol), 2,2'-methylenebis (4-methyl-6- 6) as a base oil. t-butylphenol), 2,2′-methylenebis (4-ethyl-6-tert-butylphenol), and 4, A bisphenol selected from 4'-butylidenebis (3-methyl-6-t-butylphenol) is blended. [Selection figure] None |