SCROLL COMPRESSOR

摘要

A scroll compressor capable of reducing a re-expansion loss by reverse flow while reducing a delivery pressure loss, wherein each of winding start portions of the volute wraps of a fixed scroll (12) and a turning scroll (13) is formed of a first outer circular arc smoothly connecting the tip of the volute wrap to the winding start point (B) of an outer wall involute curve and a second inner circular arc in smooth contact with the winding start point (A) of an inner wall involute curve. In the fixed scroll (12), the first outer circular arc and the second inner circular arc are formed by connecting them to each other with a third inner circular arc not smoothly connected to these circular arcs. Thus, even if operating conditions are changed, a high efficiency can be realized by preventing the reverse flow from a delivery space despite the fact that the resistance of a delivery gas passage at the end of compression is reduced.