| 摘要 |
PROBLEM TO BE SOLVED: To provide the sure sliding movement by constituting an oil supply mechanism with a simple structure when constituting bearing parts 51 to 54 of a small and inexpensive sliding bearing. SOLUTION: A compression mechanism part C has an oil storage part 55 of a low pressure refrigerant atmosphere arranged in a compression mechanism part upper part for storing lubricating oil, a refrigerant passage 57 for passing a refrigerant and an oil pump 60 for feeding the oil to the bearings 51 to 54 by sucking the lubricating oil stored in the oil storage part 55. Thus, the oil storage part 55 can be arranged on the low pressure side. Since the low pressure side is the suction atmospheric temperature, the deterioration in oil in a high temperature atmosphere and reduction in a refrigerant flow rate caused by heating the refrigerant by mixing the high temperature oil with the suction refrigerant, can be prevented. The sure sliding movement can be provided even if the bearing parts are constituted of the sliding bearing by stably supplying the lubricating oil by falling of the oil by dead weight and the simple oil pump 60. COPYRIGHT: (C)2007,JPO&INPIT
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