Patent ID: 9086067
Filing Date: 2015-07-21
Classification: F04C

Abstract:
1. A screw compressor, comprising: a screw rotor having a plurality of helical grooves formed therein, the helical grooves forming a compression chamber; a casing having a cylinder portion with the screw rotor inserted therein; an economizer circuit configured to eject intermediate pressure refrigerant into the compression chamber in a course of compression; an economizer sleeve including an economizer flange having a fitted pipe portion fitted into an interior of the larger-diameter pipe portion, and a flange portion extending radially outwardly from an end of the fitted pipe portion, the economizer circuit including the resonance passage being defined by the smaller-diameter pipe portion of the economizer sleeve, the branch passage being defined by the fitted pipe portion of the economizer flange, and the resonance space being a space formed by an inner surface of the larger-diameter pipe portion of the economizer sleeve, and the fitted pipe portion of the economizer flange.