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Scroll compressor

  • US 9,759,216 B2
  • Filed: 09/27/2013
  • Issued: 09/12/2017
  • Est. Priority Date: 09/27/2012
  • Status: Active Grant
First Claim
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1. A scroll compressor comprising:

  • a fixed scroll having a tabular first end plate, a first spiraling lap protruding from a front face of the first end plate, and a thrust sliding portion surrounding the first spiraling lap;

    a movable scroll having a tabular second end plate and a second spiraling lap protruding from a front face of the second end plate; and

    a drive part linked to the movable scroll via a crankshaft, the drive part revolving the movable scroll,the first spiraling lap and the second spiraling lap being brought together so that the front face of the first end plate and the front face of the second end plate face each other, and a compression chamber is formed between the first spiraling lap and the second spiraling lap adjacent to each other,the drive part revolving the movable scroll cyclically so that a gaseous refrigerant in the compression chamber is compressed,a back-pressure space formed at a back face side of the second end plate of the movable scroll, the back pressure space communicating with the compression chamber on a peripheral side for at least a first prescribed period in a revolution cycle of the movable scroll,a communication hole formed in the second end plate, the communication hole communicating with the back-pressure space, andon a sliding face contacting the front face of the second end plate for at least a second prescribed period in the revolution cycle of the movable scroll, in the thrust sliding portion facing the front face of the second end plate, there being formeda first oil channel extending in an arc shape in a first angle region with respect to a center of the first end plate as seen in plan view, an oil being supplied to the first oil channel from a high-pressure space communicating with the compression chamber at high pressure and retained in the first oil channel,a communication channel disposed in a second angle region, which is external to the first angle region, with respect to the center of the first end plate as seen in plan view, the communication channel communicating with the compression chamber, and, for at least a third prescribed period in the revolution cycle of the movable scroll, communicating with the communication hole, anda second oil channel disposed in the second angle region with respect to the center of the first end plate as seen in plan view, the second oil channel communicating with the back-pressure space for at least a fourth prescribed period in the revolution cycle of the movable scroll.

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