Scroll type compressor
First Claim
Patent Images
1. A scroll type compressor comprising:
- a fixed scroll (21) fixed inside of a casing (10);
a movable scroll (22) meshed with the fixed scroll (21); and
pressing means (40) for pressing the movable scroll (22) against the fixed scroll (21), said pressing means (40) being arranged so as to have a high-pressure space (S2) that serves a back face side of the movable scroll (22) and to suppress a pressing force of the movable scroll (22) against the fixed scroll (21) when a compression ratio exceeds a predetermined value, said pressing means (40) comprising an oil groove (43) formed between contact surfaces of the fixed scroll (21) and the movable scroll (22) in contact with each other and high-pressure oil introducing means (46) for introducing a high-pressure oil in the casing (10) into the oil groove (43) when the compression ratio exceeds the predetermined value.
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Abstract
In a scroll type compressor (1) that includes a fixed scroll (21) fixed inside of a casing (10) and a movable scroll (22) meshed with the fixed scroll (21) and presses the movable scroll (22) against the fixed scroll (21), the pressing force of the movable scroll (22) against the fixed scroll (21) is obtained from the pressure of a high-pressure space (S2) that acts on the back face of the movable scroll (22) and the pressing force is controlled in accordance with the variation in the compression ratio with the change in the operating condition thereby preventing decrease in efficiency and mechanical loss.
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Citations
16 Claims
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1. A scroll type compressor comprising:
- a fixed scroll (21) fixed inside of a casing (10);
a movable scroll (22) meshed with the fixed scroll (21); and
pressing means (40) for pressing the movable scroll (22) against the fixed scroll (21), said pressing means (40) being arranged so as to have a high-pressure space (S2) that serves a back face side of the movable scroll (22) and to suppress a pressing force of the movable scroll (22) against the fixed scroll (21) when a compression ratio exceeds a predetermined value, said pressing means (40) comprising an oil groove (43) formed between contact surfaces of the fixed scroll (21) and the movable scroll (22) in contact with each other and high-pressure oil introducing means (46) for introducing a high-pressure oil in the casing (10) into the oil groove (43) when the compression ratio exceeds the predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a fixed scroll (21) fixed inside of a casing (10);
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10. A scroll type compressor comprising:
- a fixed scroll (21) fixed inside of a casing (10);
a movable scroll (22) meshed with the fixed scroll (21); and
pressing means (40) for pressing the movable scroll (22) against the fixed scroll (21), said pressing means (40) being arranged so as to have a high-pressure space (S2) that serves a back face side of the movable scroll (22) and to always suppress a pressing force of the movable scroll (22) against the fixed scroll (21) through the high-pressure space (S2) in association with variation in compression ratio, said pressing means (40) comprising an oil groove (43) formed between contact surfaces of the fixed scroll (21) and the movable scroll (22) in contact with each other and a high-pressure oil introduction passage (44) for always introducing a high-pressure oil in the casing (10) into the oil groove (43). - View Dependent Claims (11, 12, 13, 14, 15, 16)
- a fixed scroll (21) fixed inside of a casing (10);
Specification