| abstract |
(57) [Summary] [Structure] Refrigerating machine oil containing a compound having at least one acetal group in the molecule and having a trivalent to octavalent alcohol residue, and a refrigerator containing hydrofluorocarbon. Working fluid composition. [Effect] The composition for a working fluid of a refrigerator of the present invention is excellent in compatibility with hydrofluorocarbon and has high stability of acid value against hydrolysis. |