| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems in which: in a conventional compressor, a lubrication oil flows back to an upstream side of the compressor after operation stop; and also, in the one in which a valve of shape memory alloy is provided in a suction pipe for preventing the backflow of the lubrication oil, a production cost of the compressor increases.SOLUTION: In a compressor, an axial position of an eccentric part 8a of a crank shaft 8 with respect to a roller 25 changes between operation time and non-operation time. The roller 25 has a communication part 41 for communicating an inner peripheral surface and an outer peripheral surface of the roller 25. An opening 41I on the inner peripheral surface side of the communication part 41 is blocked by the eccentric part 8a during operation, and opened during operation stop. |
