Patent ID: 11933302
Assignee: FUJITSU GENERAL LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A rotary compressor comprising:
an annular cylinder including a suction port and a vane groove;
an end plate configured to close an end portion of the cylinder;
a discharge port provided on the end plate and partially located outside a cylinder inner wall of the cylinder;
an annular piston fitted to an eccentric portion of a rotating shaft rotationally driven by a motor, the annular piston revolving in the cylinder along the cylinder inner wall to form a working chamber with the cylinder inner wall; and
a vane configured to protrude into the working chamber from the vane groove provided in the cylinder and abut on the annular piston to divide the working chamber into a suction chamber communicating with the suction port and a compression chamber communicating with the discharge port, wherein
the compression chamber compresses a refrigerant by contracting as the annular piston revolves,
the discharge port overlaps a corner portion formed by an inner wall of the vane groove and the cylinder inner wall on the compression chamber side,
the cylinder inner wall on the compression chamber side is formed with a discharge groove communicating with the compression chamber and the discharge port, edge portions on both sides of the discharge groove formed by an inner peripheral wall of the discharge groove and the cylinder inner wall being away from the corner portion formed by the inner wall of the vane groove and the cylinder inner wall on the compression chamber side, and
a part of the discharge groove protrudes beyond the discharge port in a circumferential direction of the cylinder and in a direction opposite to a direction of revolution of the annular piston.