Abstract: An apparatus for changing capacity of scroll compressor comprises: a seal member movably installed on one of facing surfaces of a fixed scroll so as to seal a compression space made by the fixed scroll and orbiting scroll; a back pressure passage formed to be communicated from a point, where the seal member is contacted, to an outer circumferential surface of fixed scroll; an exhaust pipe installed on outer circumferential surface of the fixed scroll to be communicated with back pressure passage; and an exhaust pipe opening/closing valve installed on center part of exhaust pipe to open/close the exhaust pipe selectively, and thereby, sealability can be improved and low capacity can be outputted without decelerating orbiting scroll in low capacity operation.

Abstract: A vane supporting apparatus for a hermetic compressor elastically supports vanes contacting to both cam faces of a dividing plate with thin torsion coil springs, and forms curved surface portions on upper ends of the vanes where the torsion coil springs are contacted, and thereby, height of the supporting apparatus supporting the respective vanes is reduced to miniaturize the compressor, and also, to prevent contacted portions between the vanes and the torsion coil springs from being worn away.

Abstract: An eccentric coupling device in a radial compliance scroll compressor including a bush rotatably fitted in a boss of an orbiting scroll, and provided with a crank pin hole extending vertically throughout the bush, a crank pin eccentrically arranged at an upper end of a crankshaft adapted to orbit the orbiting scroll, and fitted in the crank pin hole while allowing a radial movement of the bush in the crank pin hole, the crank pin having an oil passage, and a cover member fitted in the crank pin hole at an upper end portion of the crank pin hole, and adapted to guide oil, fed through the oil passage, to be supplied between the slide bush and the boss. The crank pin is fitted in the crank pin hole such that an upper end thereof is arranged at a level lower than an upper end of the slide bush. The crank pin is eccentrically arranged with respect to the crankshaft. The oil passage communicates with an oil passage extending through the crankshaft.

Abstract: An apparatus for changing capacity of scroll compressor comprises: a seal member movably installed on one of facing surfaces of a fixed scroll so as to seal a compression space made by the fixed scroll and orbiting scroll; a back pressure passage formed to be communicated from a point, where the seal member is contacted, to an outer circumferential surface of fixed scroll; an exhaust pipe installed on outer circumferential surface of the fixed scroll to be communicated with back pressure passage; and an exhaust pipe opening/ closing valve installed on center part of exhaust pipe to open/close the exhaust pipe selectively, and thereby, sealability can be improved and low capacity can be outputted without decelerating orbiting scroll in low capacity operation.

Abstract: A vane supporting apparatus for a hermetic compressor elastically supports vanes contacting to both cam faces of a dividing plate with thin torsion coil springs, and forms curved surface portions on upper ends of the vanes where the torsion coil springs are contacted, and thereby, height of the supporting apparatus supporting the respective vanes is reduced to miniaturize the compressor, and also, to prevent contacted portions between the vanes and the torsion coil springs from being worn away.