Patent ID: 8480919

Claim:
A lubricating oil composition/refrigerant combination, comprising: (1) a C 2 to C 3 unsaturated fluorinated hydrocarbon refrigerant or a combination of C 1 to C 2 saturated fluorinated hydrocarbon refrigerant with a C 3 unsaturated fluorinated hydrocarbon refrigerant, (A) a base oil comprising as a main component a polyol ester compound obtained from a polyhydric alcohol selected from the group consisting of pentaerythritol, dipentaerythritol, trimethylolpropane and neopentyl glycol, and a C 4 to C 20 aliphatic monocarboxylic acid, (B) one phosphorous acid triester selected from the group consisting of tricresyl phosphate, tris(isopropylphenyl)phosphate, and tris(nonylphenyl)phosphate, wherein said one phosphorous acid triester is the sole phosphorous acid triester in the lubricating oil composition/refrigerant combination, and (C) at least one acid scavenger selected from the group consisting of a glycidyl ester, a glycidyl ether, and an α-olefin oxide.