Motor-driven scroll type compressor

摘要

In a motor-driven scroll type compressor, a rotary shaft includes a first opening at a position adjacent to a front end of the rotary shaft and facing an inner surface of a bearing for rotatably supporting the front end of the rotary shaft, a second opening at a position adjacent to a rear end of the rotary shaft and communicating with a back pressure chamber provided in front of a movable scroll member in a housing of the compressor, a communication passage interconnecting the first opening and the second opening, and a throttle formed by a clearance between the first opening and the inner surface of the bearing.