| 摘要 |
A refrigerating cycle comprising a compressor 1 which compresses and discharges a refrigerant containing a refrigerating machine oil in a refrigerant circulating passage for lubricating the compressor 1 , wherein fine particles 17 having a nearly circular shape in cross section are put into the refrigerant circulating passage. The fine particles 17 present between the sliding surfaces of the compressor prevent direct contact between the sliding surfaces. Besides, the fine particles 17 having a nearly circular shape in cross section roll when the opposing side surfaces move relative to each other creating rolling friction. Therefore, the coefficient of friction decreases on the sliding portions of the compressor 1.
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