Patent ID: 8202068

Claim:
A capacity varying apparatus for a scroll compressor, the capacity varying apparatus comprising: a first disc configured to be fixed in an installation groove formed in an upper surface of a fixed scroll of the scroll compressor, wherein the first disc comprises at least one first low pressure communication hole and at least one first intermediate pressure communication hole formed therein; a second disc rotatably coupled to the first disc, wherein the second disc comprises at least one second low pressure communication hole and at least one second intermediate pressure communication hole formed therein; and a stopper that engages the first disc and the second disc to restrict movement of the second disc relative to the first disc, wherein the stopper comprises: a pin that extends upward from the first disc toward the second disc; and a protrusion that protrudes outward from an outer circumferential surface of the second disc, the protrusion having an elongated slot formed therein in which the pin is received, wherein rotation of the second disc relative to the first disc is restricted by engagement of the pin in the slot, wherein the at least one first low pressure communication hole, at least one first intermediate pressure communication hole, at least one second low pressure communication hole and at least one second intermediate pressure communication hole selectively provide for communication between at least one low pressure passage and at least one intermediate pressure passage formed in a body of the fixed scroll based on a position of the second disc, wherein the at least one low pressure passage communicates with a low pressure area of the scroll compressor; and the at least one intermediate pressure passage communicates with an intermediate pressure area of a plurality of compression pockets of the scroll compressor.