Patent ID: 6193488
Filing Date: 2001-02-27
Classification: F04C

Abstract:
A scroll type compressor comprising:a housing;a fixed scroll member fixed with the housing, the fixed scroll member having a spiral shaped fixed spiral element;a movable scroll member making the rotating movement in the housing and having a spiral shaped movable spiral element to be contacted with the fixed spiral element in order to constitute an operation chamber where fluid is compressed; andreliefs provided on at least one of the spiral elements for preventing mutual contact of both of the spiral elements;wherein the reliefs are formed at a center and an outer periphery portion of the at least one of the spiral elements and both of the spiral elements come to contact with each other at an intermediate portion between the center and the outer periphery portion,wherein the relief of the center portion is formed within the range defined by a winding angle Y of the spiral element in the below equation;Y=a(X-1)whereY: winding angle,X: winding turn of the spiral element, anda: 0.ltoreq.a.ltoreq.64.