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Scroll compressor with differential pressure hole

  • US 8,992,191 B2
  • Filed: 09/26/2012
  • Issued: 03/31/2015
  • Est. Priority Date: 09/28/2011
  • Status: Active Grant
First Claim
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1. A scroll compressor, comprising:

  • a shell having an inner space configured to be filled with refrigerant, the inner space containing a predetermined amount of oil;

    a drive motor installed in the shell;

    a crankshaft coupled to the drive motor and having an oil passage formed therethrough;

    a fixed scroll fixed to the shell and having a fixed wrap; and

    an orbiting scroll having an orbiting wrap engaged with the fixed wrap, the orbiting scroll forming compression chambers together with the fixed scroll while orbiting with respect to the fixed scroll, wherein the orbiting scroll comprises a differential pressure hole that communicates a high pressure space formed in the inner space of the shell with an intermediate pressure space formed between the fixed scroll and the orbiting scroll, and wherein the differential pressure hole comprises a decompression portion having a pin member inserted therein that decompresses oil, wherein an inner diameter of the decompression portion is greater than an outer diameter of the pin member, and wherein the fixed scroll comprises a communication hole having a first open end that communicates with the high pressure space, and a second open end that communicates with the first open end and a low pressure space between the fixed scroll and the orbiting scroll.

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