Patent ID: 8152501

Claim:
A scroll compressor having a step portion on each of a top surface and a bottom surface of a spiral wrap of a fixed scroll member and an orbiting scroll member pair, each formed of an end plate and the spiral wrap mounted upright thereon, a height of the spiral wrap on an outer peripheral side of the step portion being made higher than a height of the spiral wrap on an inner peripheral side, the scroll compressor being configured for three-dimensional compression in a circumferential direction and a height direction of the spiral wrap, the top surfaces on the outer peripheral side and on the inner peripheral side of the spiral wrap each being provided with a tip seal, wherein a back-pressure introducing portion where a gap between a back surface at a step-portion end of the tip seal and a groove bottom surface of a tip seal groove is made larger than a gap at the other portion is provided between the step-portion end of the tip seal provided on the top surface on the outer peripheral side of the spiral wrap and the tip seal groove to which the tip seal is fitted, and wherein b>T 2 holds where b is the width of an edge formed at the step-portion end of the tip seal groove and T 2 is the width of edges formed along and on both sides of the tip seal groove.