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Scroll type compressor

  • US 6,533,561 B1
  • Filed: 07/20/2001
  • Issued: 03/18/2003
  • Est. Priority Date: 11/22/1999
  • Status: Expired due to Term
First Claim
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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.

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