System, method and apparatus for just-in-time conditioning using a thermostat

CAFC
  • US 8,498,753 B2
  • Filed: 05/04/2010
  • Issued: 07/30/2013
  • Est. Priority Date: 05/08/2009
  • Status: Active Grant
First Claim
Patent Images

1. A method for reducing the cycling time of a climate control system, said method comprising:

  • accessing stored data comprising a plurality of historic internal temperature readings taken within a structure and a plurality of measurements relating to a plurality of historic external temperatures outside said structure during at least one selected time period;

    determining one or more thermal performance values of said structure by correlating at least one of the plurality of historic internal temperatures with at least one of the plurality of historic external temperatures that both occur at a first time during the at least one selected time period, and by correlating at least one of the plurality of historic internal temperatures with at least one of the plurality of historic external temperatures that both occur at a second time during the at least one selected time period, wherein said one or more thermal performance values indicate a rate of change of temperature in said structure in response to changes in outside temperatures;

    storing said one or more thermal performance values of said structure;

    retrieving a target time at which said structure is desired to reach a target temperature;

    acquiring at least a first internal temperature inside said structure at a third time prior to said target time;

    acquiring at least a first external temperature relating to a temperature outside said structure at the third time prior to said target time;

    obtaining at least one forecasted temperature forecasted to occur outside the structure at the target time;

    retrieving at least said one or more thermal performance values of said structure that indicate said rate of change of temperature in said structure in response to changes in outside temperatures;

    retrieving at least one performance characteristic of said climate control system;

    determining a first time prior to said target time at which said climate control system should turn on to reach the target temperature by the target time based at least in part on said one or more thermal performance values of said structure, said performance characteristic of said climate control system, said first internal temperature, said first external temperature, and the forecasted temperature;

    calculating a plurality of intermediate setpoints and a plurality of setpoint target times that occur between the first time and the target time based at least in part on said one or more thermal performance values of said structure, said performance characteristic of said climate control system, said first internal temperature, said first external temperature, and the forecasted temperature,wherein the plurality of intermediate setpoints direct a thermostatic controller to change the actual temperature inside the structure to the target temperature in a series of intermediate steps;

    transmitting the plurality of intermediate setpoints to the thermostatic controller; and

    setting the thermostatic controller with the plurality of intermediate setpoints to control said climate control system.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×