Patent ID: 7309217
Filing Date: 2007-12-18
Classification: F04C

Abstract:
1. A variable capacity rotary compressor, including a hermetic casing, a housing installed in the hermetic casing to define therein first and second compression chambers having different capacities, and a compressing unit placed in the first and second compression chambers, to execute a compression operation in either the first or second compression chamber according to a rotating direction of a rotating shaft which drives the compressing unit, the variable capacity rotary compressor comprising: a suction path controller, including a hollow body, having an inlet connected to a refrigerant inlet pipe, and first and second outlets formed on the hollow body at opposite ends of the hollow body to be spaced apart from the inlet of the hollow body, the first and second outlets being respectively connected to corresponding inlet ports of the first and second compression chambers, and a valve unit installed in the hollow body to axially reciprocate in the hollow body to change a refrigerant suction path by a pressure difference between the first and second outlets of the hollow body; and a pressure controller, including a high-pressure pipe to connect an outlet side of the compressor to the suction path controller, and first and second communicating paths provided on both sides of the valve unit to be spaced apart from each other, either the first or second communicating path communicating with an outlet of the high-pressure pipe in response to an operation of the valve unit so that a pressure of the high-pressure pipe acts on the first or second compression chamber where an idle operation is executed.