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1. (WO1998051931) CAPACITY CONTROL SCROLL COMPRESSOR

Pub. No.:    WO/1998/051931    International Application No.:    PCT/JP1998/002079
Publication Date: Fri Nov 20 00:59:59 CET 1998 International Filing Date: Tue May 12 01:59:59 CEST 1998
IPC: F04B 49/00
F04C 18/02
Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

MAKINO, Masahiko

SHIMIZU, Akihiko

Inventors: MAKINO, Masahiko

SHIMIZU, Akihiko

Title: CAPACITY CONTROL SCROLL COMPRESSOR
Abstract:
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.