SCROLL COMPRESSOR

PROBLEM TO BE SOLVED: To provide a scroll compressor adapted to improve the reliability and quality by preventing seizure of a shaft caused by lubrication failure of a bearing part during reverse operation. SOLUTION: The scroll compressor 100 includes a compression mechanism part 40 having a fixed scroll 1, a swing scroll 2, an Oldham's ring 9, a main shaft 4 for driving the swing scroll 2, and a guide frame 15 fixed on a sealed container 10, supporting the main shaft 4 radially, and fastened with and coupled to the fixed scroll 1. A communication hole for communicating a boss part space of the swing scroll 2 and a compression chamber in an expansion stroke is formed on a base plate part of the swing scroll 2 so that a pressure in a boss part space of the swing scroll 2 is lowered than a pressure in the sealed container 10 during the reverse operation of a motor 20, and refrigerant oil 10e is supplied to the compression mechanism part 40 by the differential pressure. COPYRIGHT: (C)2011,JPO&INPIT