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Method of determining refrigerant charge level in a space temperature conditioning system

  • US 6,571,566 B1
  • Filed: 04/02/2002
  • Issued: 06/03/2003
  • Est. Priority Date: 04/02/2002
  • Status: Active Grant
First Claim
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1. In a space temperature conditioning system having a refrigerant as a heat transfer medium, a method of determining refrigerant charge level, comprising the steps of:

  • establishing a relationship between at least one system operating parameter and refrigerant charge level, independent of ambient temperature conditions;

    operating the space temperature conditioning system;

    measuring said at least one system operating parameter while the system is in operation; and

    determining refrigerant charge level based on said relationship in response to said measuring.

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