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Method of determining indoor or outdoor temperature limits

  • US 7,024,283 B2
  • Filed: 10/28/2002
  • Issued: 04/04/2006
  • Est. Priority Date: 10/28/2002
  • Status: Active Grant
First Claim
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1. A method of determining a tolerable outdoor temperature limit for a temperature conditioning apparatus having a capacity that varies up to a maximum capacity, comprising:

  • determining a target indoor temperature;

    sensing an outdoor temperature;

    sensing an actual indoor temperature;

    repeatedly comparing the outdoor temperature to at least one of the actual indoor temperature and the target indoor temperature to determine a plurality of load values;

    varying the capacity of the temperature conditioning apparatus to help maintain the actual indoor temperature within a predetermined range of the target indoor temperature;

    creating performance data by comparing the capacity to the plurality of load values; and

    extrapolating the performance data to the maximum capacity to predict the tolerable outdoor temperature limit at which the temperature conditioning apparatus is expected to be able to maintain the actual indoor temperature within the predetermined range of the target indoor temperature.

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