| 摘要 |
PURPOSE:To enable a compressor to be prevented from its short of oil during its operation preventing an amount of the oil, carried out to the outside of the compressor, from substantially increasing even if a supply amount of the oil substantially increases, by providing a communication hole, through which oil reservoir space communicates with the inside of an enclosed vessel, in a bearing part. CONSTITUTION:If a crankshaft 37 is rotated by an electric motor 33, lubricating oil in a lubricating oil reservoir 57 passes through the inner of the crankshaft 37 lubricating an eccentric bearing 51 and being fed to the oil reservoir space 52 by a feed oil pump 54. A compressor circulates this lubricating oil returning its one part into an enclosed vessel 32 from a return oil port 56 via the first main bearing 46 while one part directly into the enclosed vessel 32 from a communication hole 53. And a clearance between the bottom surface of a turning volute vane part 41 and a turning vane thrust bearing 49 leaks a small amount of lubricating oil to be introduced to a compression chamber 43. The compressor, which provides the communication hole 53 from the space 52 directly into the enclosed vessel 32, prevents an amount of lubricating oil, carried out to the outside of the compressor, from substantially increasing even if a supply amount of lubricating oil of the feed oil pump 54 substantially increases due to a speed increase or the like of the compressor.
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