| abstract |
A lubricating oil composition for refrigerators comprising a base oil which comprises as main component a polyol ester compound obtained from a polyhydric alcohol selected from pentaerythritol, dipentaerythritol, trimethyloxypropane and neopentyl glycol and an aliphatic monocarboxylic acid of 4 to 20 atoms of carbon and which has an acid value of 0.02 mgKOH / g or less and a hydroxyl value of 5 mgKOH / g or less. A compressor that uses the lubricant composition. The lubricating oil composition is applicable to these refrigerators that use a coolant that has a specific structure, such as an unsaturated fluorocarbon compound and that is usable in today's car air conditioner systems and has excellent coolant compatibility, good sealing properties, compatibility to confer a low coefficient of friction on sliding members and, still, excellent stability. The compressor uses the lubricant composition. |