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Scroll compressor

  • US 6,893,235 B2
  • Filed: 02/27/2003
  • Issued: 05/17/2005
  • Est. Priority Date: 03/04/2002
  • Status: Expired due to Fees
First Claim
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1. A scroll compressor comprising:

  • a casing housing a compression mechanism including a fixed and orbiting scrolls having respective involute wraps which matingly engage with each other and respective press-contact surfaces which press-contact each other in an axial direction;

    a drive mechanism coupled, through a drive shaft to said orbiting scroll; and

    a press-contact surface lubrication path which is formed in said orbiting scroll so as to communicate with said press-contact surfaces from a main lubrication path formed in said drive shaft, said press-contact surface lubrication path comprising a first pathway which communicates with said press-contact surfaces from inside of said orbiting scroll, a second pathway which communicates with said press-contact surfaces through a low-level pressure space of said casing, and a lubrication control mechanism which opens said first pathway and closes said second pathway when a difference between a high-level pressure and a low-level pressure within said casing exceeds a predetermined value, and which closes said first pathway and opens said second pathway when said high-low pressure difference is equal to or less than said predetermined value.

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