Lubricant for compression type refrigerating machine and refrigeration system using the same

摘要

A lubricating oil for a compression-type refrigerator using a hydrofluorocarbon refrigerant including a polyvinyl ether-based compound containing in the molecule an alkylene glycol unit or a polyoxyalkylene glycol unit and a polyvinyl ether unit and having a molecular weight in the range of 300 to 3,000, and a refrigeration apparatus using the lubricating oil. The present invention can provide a lubricating oil for a compression-type refrigerator having good compatibility in the atmosphere of a hydrofluorocarbon and a high viscosity index, and a refrigeration apparatus using such a lubricating oil.