| 摘要 |
PROBLEM TO BE SOLVED: To secure lubrication and to improve reliability and efficiency of an expander of a refrigeration cycle. SOLUTION: Pressures in sealed containers of a compressor 21 and the expander 22 are kept approximately same as a pressure of a refrigerant compressed by the compressor 21, and lubricant reservoirs 21d, 22d are respectively mounted in the sealed containers 21c of the compressor 21 and the sealed container 22c of the expander 22 in a state of being connected with each other by a communication pipe 23, thus proper amounts of lubricants can be secured in the compressor 21 and the expander 23, sliding portions can be lubricated, and performances of a compression mechanism portion and an expansion mechanism portion can be improved by seal effect. COPYRIGHT: (C)2007,JPO&INPIT
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