| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve problems of a conventional configuration that an oil amount is increased if a clearance between a piston and a cylinder is increased in a height direction in order to increase an oil amount from a piston inner face, but leakage of refrigerant gas from a compression chamber to a suction chamber is increased simultaneously, and performance is deteriorated, and that if an excessive oil amount is supplied to the compression chamber, oil discharge into a refrigerating cycle is increased, and performance of the refrigerating cycle is deteriorated. <P>SOLUTION: As recesses 11 are configured toward the outer periphery from the upper bearing inner face 2a on the end face of an upper bearing 2, oil can be positively supplied to the compression chamber. <P>COPYRIGHT: (C)2012,JPO&INPIT |
