CAPACITY CONTROL SCROLL COMPRESSOR

摘要

A capacity control scroll compressor having a simple, compact and high-reliability control mechanism, including a pair of bypass holes (50a, 50b, 51a and 51b) communicating with a pair of fluid pockets in the same compression process, a bypass hole (52a) communicating with one fluid pocket formed from the pair of fluid pockets aligned as the compression process further proceeds, and a shuttle valve (60) for sequentially opening and closing the bypass holes by reciprocating motion, and fitted into a cylinder (61) disposed inside a fixed end plate (1a). The shuttle valve (60) has a stepped cylindrical structure having different outer diameters so as to improve the strength and rigidity of the shuttle valve itself. The smooth operation of the shuttle valve (60) can be ensured even at high temperatures and high pressures.