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System for determining ambient temperature

  • US 8,949,066 B2
  • Filed: 03/29/2012
  • Issued: 02/03/2015
  • Est. Priority Date: 12/04/2007
  • Status: Active Grant
First Claim
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1. A thermostat that functions to provide control signals to temperature control equipment to maintain a desired temperature in a space, the thermostat comprising:

  • a housing;

    one or more heat generating elements within the housing, wherein during operation of the thermostat, the one or more heat generating elements cause a first region within the housing to be at a different temperature than a second region within the housing;

    a first temperature sensor within the housing for reporting a measure that is related to the temperature in the first region;

    a second temperature sensor within the housing for reporting a measure that is related to the temperature in the second region;

    a controller in communication with the first temperature sensor and the second temperature sensor, the controller determining a measure related to an ambient temperature outside of the housing based, at least in part, on;

    the measure that is related to the temperature in the first region reported by the first temperature sensor;

    the measure that is related to the temperature in the second region reported by the second temperature sensor;

    a first constant, wherein the first constant is multiplied by the measure that is related to the temperature in the first region reported by the first temperature sensor, but is not multiplied by a difference between the measure that is related to the temperature in the first region reported by the first temperature sensor and the measure that is related to the temperature in the second region reported by the second temperature sensor; and

    the thermostat using the measure related to the ambient temperature outside of the housing to determine one or more control signals for controlling temperature control equipment.

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