| abstract |
A refrigerator oil composition which comprises (A) a base oil comprising at least one selected from among a polyalkylene glycol, a polyol ester, a poly-α-olefin, an alkylbenzene and an mineral oil (B) an organic sulfur compound having a sulfur content of 35 mass % or less and (C) a coolant comprising at least one selected from among carbon dioxide, a hydrocarbon and ammonia, wherein it has a total sulfur content of 0.01 to 0.1 mass % relative to the sum of the amounts of (A) and (B) components. The refrigerator oil composition is novel, and is free from an environmental problem such as the depletion of an ozone layer or the global warming effect, can retain its lubricating performance for a long period of time, and does not cause the blocking of a capillary in a refrigeration cycle. |