Scroll compressor and processing method of scroll including a projection on a tip seal and a hole in a tip seal groove

摘要

In a scroll compressor of the present invention, tip seals and are fitted in tip seal grooves provided in higher and lower tip surfaces of spiral wraps. One end of the tip seals then repeats contact and non-contact with a bottom land of the other scroll by a revolution in an orbiting manner of an orbiting scroll. In addition, a projection extending in a vertical direction from a back surface of the tip seals is provided at one end of the tip seals that become in a cantilever state. Furthermore, a hole in which the projection is fitted and engaged is formed in one end bottom surface of the tip seal grooves in which the tip seals are fitted.

主权项

1. A scroll compressor comprising: a fixed scroll and an orbiting scroll each of which is provided with a step formed in each of a tip surface and a bottom land of a spiral wrap thereof, each of the steps being at a position along a spiral direction of the tip surface or the bottom land, and a wrap height of an outer circumferential side of the spiral relative to the step wrap being higher than a wrap height of an inner circumferential side thereof relative to the step; a tip seal groove provided in a higher tip surface and a lower tip surface of the spiral wrap of each of the fixed scroll and the orbiting scroll; and a tip seal fitted in each of the tip seal grooves of the fixed scroll and the orbiting scroll,
wherein the outer circumferential end of the tip seal fitted on the higher tip surface of the fixed scroll and the orbiting scroll is repeatedly situated in a non-contact state in which said outer circumferential end moves beyond an outer end of the bottom land of the corresponding scroll and thereby said outer circumferential end of the tip seal does not come into contact with said bottom land, and in a contact state in which said outer circumferential end moves beyond said outer end of the bottom land so that said outer circumferential end of the tip seal again comes into contact with said bottom land, wherein said outer circumferential end of the tip seal becomes a cantilever state in the non-contact state, wherein said outer circumferential end of the tip seal is provided with a projection extending in a vertical direction from a back surface of the tip seal, wherein the tip seal groove is provided with a hole in which the projection is fitted and engaged at an outer circumferential end of the corresponding bottom surface of the tip seal groove in which the tip seal is fitted so that said outer circumferential end of the tip seal is prevented from moving in the axial direction of the compressor and thereby from being detached from the tip seal groove, wherein the outer circumferential end of the tip seal fitted on the higher tip surface faces and comes into contact with, in the circumferential direction of the fixed scroll, the outer circumferential end wall of the corresponding tip seal groove.