| abstract |
(57) Abstract: The present invention uses a polyvinyl ether-based oil compatible with an HFC-based refrigerant such as R134a as a refrigerating machine oil, and performs friction control of a sliding member without complicated process control. Generation of carboxylic acid by thermal decomposition or hydrolysis by heat, It is another object of the present invention to provide a high-performance refrigerant compressor that suppresses the generation of sludge associated therewith. According to the present invention, an HFC-based single refrigerant or a refrigerant mixture thereof and a refrigerating machine oil compatible with the refrigerant are enclosed in the closed container while accommodating a compressor section in the closed container. The refrigerating machine oil is mainly composed of a polyvinyl ether compound having a structural unit represented by the following general formula (1), and in each structural unit, R4 has 1 to 2 carbon atoms. Wherein the alkyl group has a composition ratio of 40 to 100%, and the alkyl group having 3 to 4 carbon atoms has a composition ratio of 0 to 60%. Embedded image |