Patent ID: 7232291
Filing Date: 2007-06-19
Classification: F04C

Abstract:
1. A variable capacity rotary compressor, comprising: a casing to form an external appearance of the variable capacity rotary compressor; a drive unit to generate a rotating force; a rotating shaft connected at a first end thereof to the drive unit, and rotated by the rotating force transmitted from the drive unit to the rotating shaft; a compressing cylinder through which a second end of the rotating shaft passes; a compressing chamber defined in the compressing cylinder to compress refrigerant therein, with a first refrigerant inlet port provided at a predetermined portion of the compressing chamber to introduce the refrigerant into the compressing chamber; and a capacity control unit comprising the first refrigerant inlet port and controlling an operation of the variable capacity rotary compressor so as to allow the rotary compressor to perform one of a normal-mode operation wherein the first refrigerant inlet port is maintained at an open state thereof to continuously introduce the refrigerant into the compressing chamber, and of a variable capacity-mode operation wherein the first refrigerant inlet port is periodically opened and closed so as to periodically stop the introduction of the refrigerant into the compression chamber, wherein the capacity control unit further comprises a capacity control member installed to rotate along with the rotating shaft while moving axially along the rotating shaft to allow the rotary compressor to perform one of the normal-mode operation and of the variable capacity-mode operation.