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|1. (WO2013146522) LUBRICATING OIL COMPOSITION FOR REFRIGERATING MACHINES|
|Applicants:||IDEMITSU KOSAN CO.,LTD.
|Title:||LUBRICATING OIL COMPOSITION FOR REFRIGERATING MACHINES|
This lubricating oil composition for refrigerating machines is made by blending an additive to a base oil, wherein said additive is a naphthalimide compound, and a refrigerant for the refrigerating machine in which said composition is used is an unsaturated fluorohydrocarbon (unsaturated HFC) having a GWP of 1000 or less. In refrigerating devices in which this lubricating oil composition for refrigerating machines is to be used, such as open-type automotive air conditioners, electric automotive air conditioners, gas heat pumps, air conditioners, refrigerators, vending machines, showcases, hot-water supply systems, and refrigeration/heating systems, refrigerant leakage can be detected stably over a long period of time. Thus, this lubricating oil composition for refrigerating machines is extremely effective in cases where an unsaturated fluorocarbon refrigerant with low stability is used in the various devices mentioned above.