Patent ID: 9482231
Filing Date: 2016-11-01
CPC Classification: F04B,F04C

Claim Text:
1. A rotary compressor which uses refrigerant including R32, and which stores oil and a compression element in a hermetic container, wherein the compression element comprises: a shaft having an eccentric portion; a cylinder forming a compression chamber concentrically with a rotation center of the shaft; a bearing which hermetically closes both side surfaces of the cylinder and which pivotally supports the shaft; a piston which is mounted on the eccentric portion and which rolls along an inner wall of the cylinder by rotation of the shaft; and a vane which partitions the compression chamber into a high pressure chamber and a low pressure chamber, wherein an oil groove is provided in an inner peripheral surface of the bearing, and one end of the oil groove opens at a bearing base portion which is on a side of the compression chamber, and an other end of the oil groove opens at a bearing end which is on a side of a space in the hermetic container, wherein the oil groove is formed with a spiral shape in which an opening of the bearing end is located closer to a rotation direction of the shaft than an opening of the bearing base portion, the oil groove is provided at a place other than a locus of an axis of the eccentric portion when the eccentric portion rotates and receives a varied load.