-
公开(公告)号:US06666036B2
公开(公告)日:2003-12-23
申请号:US09958739
申请日:2001-10-16
申请人: Hideki Matsuura
发明人: Hideki Matsuura
IPC分类号: F25B0000
CPC分类号: F04B39/16 , C09K5/045 , C09K2205/24 , C10M107/24 , C10M171/008 , C10M2209/04 , C10M2209/06 , C10M2209/062 , C10N2240/00 , C10N2240/22 , C10N2240/30 , C10N2240/50 , C10N2240/52 , C10N2240/54 , C10N2240/56 , C10N2240/58 , C10N2240/60 , C10N2240/66 , F04B39/0215 , F25B9/002 , F25B31/002 , H02K3/30
摘要: Moisture in a refrigeration circuit is absorbed by means of a polyvinyl ether oil that has hygroscopicity and serves as a refrigerating machine oil. Therefore, even if a compressor comes to have an elevated temperature attributed to the employment of a refrigerant made of a single substance of R32, the insulating film of the built-in motor of the compressor is hard to hydrolyze. Moreover, by setting a saturated moisture amount of polyvinyl ether at a temperature of 30° C. and a relative humidity of 80% to 5000 ppm or more, a tensile strength retention rate of the motor insulating film made of PET or PEN, which can easily be processed, can be set to 50% or more, by which the deterioration of the insulating film can be prevented. Therefore, the performance of the refrigerating apparatus can be stabilized for a long term by avoiding the breakdown of the compressor.