Patent ID: 9719511
Date: 2017-08-01
CPC Classifications: F01C,F04C

Claim:
1. A scroll compressor comprising: a partition plate for partitioning an interior of a hermetic container into a high pressure space and a low pressure space; a fixed scroll that is adjacent to the partition plate; an orbiting scroll that is meshed with the fixed scroll and forms compression chambers; a rotation-restraining member for preventing the orbiting scroll from rotating; a main bearing for supporting the orbiting scroll, in which a boss portion that is formed on a central portion of an upper surface of the fixed scroll and a peripheral wall that is formed around the fixed scroll; a discharge space that is formed between the partition plate and the fixed scroll and is in communication with the compression chamber; a ring-shaped first seal member placed on an outer periphery of the discharge space between the partition plate and the fixed scroll; and a ring-shaped second seal member placed on an outer periphery of the first seal member between the partition plate and the fixed scroll, wherein the discharge space is formed in the boss portion by a concave portion, the first seal member and the second seal member are disposed in a ring-shaped concave portion that is formed between the peripheral wall and the boss portion, a pressure in a medium pressure space formed between the first seal member and the second seal member is set lower than a pressure in the discharge space and higher than a pressure in the low pressure space, the first seal member and the second seal member are sandwiched by the partition plate with a closing member, the partition plate is provided with an open hole which brings, into communication with each other, the high pressure space and a closed space, and the closed space is closed by the first seal member, the second seal member, the closing member and the partition plate, the closing member is composed of a ring-shaped member and a plurality of projections formed on one of surfaces of the ring-shaped member, and the projections are inserted into holes formed in the partition plate, the ring-shaped member is pressed against a lower surface of the partition plate, an inner periphery of the first seal member is pressed against an outer peripheral surface of the boss portion, and an outer periphery of the second seal member is pressed against an inner peripheral surface of the peripheral wall, and the closing member is fixed to the partition plate.