| 摘要 |
PROBLEM TO BE SOLVED: To provide high performance in the whole operation area by arranging a back face excessive intermediate pressure area to apply pressure slightly larger than intermediate pressure between suction pressure and delivery pressure to a turning back face being the anti-compression space side of an end plate of a scroll member. SOLUTION: An opposite surface side space of a valve element 100a leads to an intermediate pressure chamber 68 where a time average becomes intermediate pressure being pressure between suction pressure and delivery pressure by an intermediate side conducting passage 2α. Therefore, when pressure of a back face excessive intermediate pressure area 99 becomes higher than excessive intermediate pressure being a constant value correspondent to pressing force of a differential pressure regulating valve spring 100c in this intermediate pressure, the valve element 100a moves to the differential pressure regulating valve spring 100c side. As a result, among gas and oil in a turning side surface area 67, one except flowing in a suction chamber 60 through a slidingly movable surface flows in the intermediate pressure chamber 68 through a back face side conducting passage 2β, a clearance between the valve element 100a and a valve seal surface 2j, a side surface of the valve element 100a, a valve hole 2f and an intermediate side conducting passage 2α. As a result, volumetric efficiency is improved, and a small and large capacity compressor is obtained.
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