| 摘要 |
PROBLEM TO BE SOLVED: To reduce the required input to a motor mechanism unit to drive a compression mechanism. SOLUTION: In a rotary compressor having a rotary compression mechanism unit C and a motor mechanism unit M to give the rotational force to the compression mechanism unit C via a rotary shaft 4 in a sealed vessel 1, a circumferential flat groove 4a is formed in an eccentric part 4A of the rotary shaft 4, a circumferential flat groove 4b is formed in a pivotally supported part 4B which is rotatably supported by a lower bearing 7, and a circumferential flat groove 4c is formed in a pivotally supported part 4C which is rotatably supported by an upper bearing 6. The sliding resistance when rotating the rotary shaft 4 is reduced by reducing the contact area between the eccentric part 4A of the rotary shaft 4 and a roller 9, between the pivotally supported part 4B and the lower bearing 7, and between the pivotally supported part 4C and the upper bearing 6. A refrigerator oil 19 stays in the flat grooves 4a, 4b and 4c, and is effective to reduce the sliding resistance and the wear of a sliding part.
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