Lubricating oil composition for refrigerators and method for lubrication with the composition

摘要

A composition for use in compression refrigeration comprising:
(A) a refrigerant containing a C1-C8 hydrocarbon as the principal ingredient, and
(C) a lubrication base oil whose primary component is a specified polyalkylene glycol derivative having a kinematic viscosity of 5-200 mm 2 /s at 100°C; and a method for lubricating compression refrigerators making use of the composition. The composition and the method of the invention achieve improved antiabrasion and stable operation due to efficient lubrication, and as a result, enhanced lubrication performance and sealing effect, as well as improved refrigeration performance can be attained.