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Method for sensing a fluid in a compressor shell

  • US 20110075699A1
  • Filed: 12/03/2010
  • Published: 03/31/2011
  • Est. Priority Date: 04/11/2007
  • Status: Active Grant
First Claim
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1. A method for sensing a fluid in a compressor, wherein the fluid can exist in a plurality of states including at least one of a liquid state, a gaseous state, and a gas/liquid mixture, the method comprising:

  • positioning a thermistor in heat transfer relationship with the fluid;

    electrically heating the thermistor to a heated temperature that is higher than a fluid temperature of the fluid;

    after electrically heating the thermistor, allowing the thermistor to cool toward the fluid temperature, wherein the thermistor cools at a cooling rate; and

    determining the fluid temperature based on the cooling rate.

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