| 摘要 |
PURPOSE:To prevent refrigerating machine oil from flowing into a cylinder and prevent the damage on restarting of a liquid-compressing compressor in a rolling-piston type rotary refrigerant compressor by cutting off the feed-oil passage between a oil sump and the inside of the cylinder when opertion is stopped. CONSTITUTION:As the discharge pressure in an outer cylinder 17 is increased after starting the operation of a compressor, refrigerating machine oil in an oil sump 8 passes through an oil suction passage 6, passages 23 and 22, bypasses 21 and 20, the clearance in a needle bearing 9, installation space 24, a passage 28, a throttle passage 29, a passage 30, in order and flows into a suction side passage 27, lubricating each sliding part on the oil route mentioned above. When operation is stopped, an eccentric shaft 10 fails to maintain the top dead center angle due to the resultant load consisting of the spring force of a spring 14 pressing a partition vane 13 against a piston 12 and the pressure load applied to the end surface of the partition vane 13, cutting off the connection between the bypasses 21 and 20 provided in a sliding plate 19 and a side plate 2 respectively, thereby preventing the refrigerating machine oil from flowing into a cylinder 11. |
