Patent ID: 7950912
Filing Date: 2011-05-31
Classification: F04C

Abstract:
1. A scroll compressor comprising: a fixed scroll member having a fixed spiral wrap erected on one face of a fixed end plate; and an orbiting scroll member having an orbiting spiral wrap erected on one face of an orbiting end plate and assembled in a manner for orbiting, while being blocked from rotations, with respect to the fixed scroll member, each of the fixed scroll member and the orbiting scroll member including a step portion on a leading end face and a bottom face of the spiral wrap such that the spiral wrap has a higher wrap height on the outer circumference side than that on the inner circumference side, and the scroll compressor being enabled to perform three-dimensional compressions for compressing in the circumferential direction of the spiral wrap and in the wrap height direction, wherein the spiral wrap, at least on the inner circumference side with respect to the step portion, is stepwise or continuously made gradually lower toward the center side of the spiral wrap, and wherein a tip clearance of the spiral wrap, at least on the inner circumference side with respect to the step portion, is made gradually larger toward the center side of the spiral wrap, and wherein the gradient at the time when the spiral wrap on the inner circumference side with respect to the step portion is stepwise or continuously made gradually lower toward the center side of the spiral wrap is made gradually larger toward the center side of the spiral wrap.