| 摘要 |
PROBLEM TO BE SOLVED: To prevent degradation of compressing efficiency and an air rate by forming an outlet on a land part for enclosing an outlet center shaft hole or a center crank shaft hole and communicating the outlet with involute shaped groove region inner circumferential ends positioned on the the land part outer peripheral side through a penetrating hole. SOLUTION: An outlet port 7 is drilled on a land part 4 arranged on the inward side of a scroll groove inner circumferential wall surface 21a, and a penetrating hole 31 for penetrating the scroll groove inner circumferential wall surface 21a and the outlet port 7 is formed along an extending direction of the outer peripheral wall 4a of the land part 4. The capacity of a final compressing chamber can be easily contracted in order not to open the final compassing chamber, until a lap inner circumferential end 15a of a turning scroll approaches to the outer peripheral wall 4a of the land part 4. A chip seal groove is recessed in a semiconductor shape along the scroll groove inner circumferential wall surface 21a of the land part 4, and a chip seal 9b is fitted to the seal groove integratedly with the chip seal 9. It is thus possible to improve a compressing efficiency. |
