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

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

• Current Assignee: EcoFactor, Inc. (Trane Technologies plc)
• Original Assignee: EcoFactor, Inc. (Trane Technologies plc)
• Inventors: Steinberg, John Douglas, Hublou, Scott Douglas, Cheung, Leo
• Primary Examiner(s): ORTIZ RODRIGUEZ, CARLOS R
• Application Number:
  US12/773,690
• Publication Number:
  US 20100318227A1
• Time in Patent Office: 1,183 Days
• Field of Search: 700/296, 700/299, 700/300, 700/306, 700/278
• US Class Current: 700/300
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/56 Remote control
• CPC Class Codes: F24F 11/59 for presetting
• CPC Class Codes: F24F 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
• CPC Class Codes: F24F 11/64 using pre-stored data
• CPC Class Codes: F24F 11/65 for selecting an operating mode
• CPC Class Codes: F24F 11/89 Arrangement or mounting of control or safety devices
• CPC Class Codes: F24F 2130/00 Control inputs relating to environmental factors not covered by group F24F2110/00
• CPC Class Codes: F24F 2130/10 Weather information or forecasts
• CPC Class Codes: G05B 19/0426 Programming the control sequence
• CPC Class Codes: G05D 23/1917 using digital means
• CPC Class Codes: G05D 23/1931 to control the temperature of one space

Abstract

Systems and methods for reducing the cycling time of a climate control system. For example, one or more of the exemplary systems can receive from a database a target time at which a structureis desired to reach a target temperature. In addition, the system acquires the temperature inside the structure and the temperature outside the structure at a time prior to the target time. The systems use a thermal characteristic of the structure and a performance characteristic of the climate control system, to determine the appropriate time prior to the target time at which the climate control system should turn on based at least in part on the structure, the climate control system, the inside temperature and the outside temperature. The systems then set a setpoint on a thermostatic controller to control the climate control system.

Claims

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.

2. A method as in claim 1 where said thermostatic controller operates a system for changing the air temperature in a structure.

3. A method as in claim 1 where said climate control system is a heating, ventilation and air conditioning system.

4. A method as in claim 1 where said climate control system is a heating, ventilation and air conditioning system in a single family residence.

5. A method as in claim 1 in which at least one remote processor is in communication with said thermostatic controller.

6. A method as in claim 5 in which said remote processor is not located in the same structure as said thermostatic controller.

7. A method as in claim 5 in which said remote processor sets programming for said thermostatic controller.

8. A method as in claim 1 in which said thermostatic controller is programmable.

9. A method for minimizing the cycling time of a space heating system, said method comprising:

accessing stored data comprising a plurality of historic internal temperatures within a structure and 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 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 the one or more thermal performance values of said structure;

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

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

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

obtaining at least one forecasted temperature forecasted to occur outside said 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 a climate control system;

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

calculating at least a first setpoint target time and a second setpoint target time based at least in part on said one or more thermal performance values of said structure, said at least one performance characteristic of the climate control system, said first internal temperature and said first external temperature, and the forecasted temperature,

where said second setpoint target time is prior to said target time, and said first setpoint target time is prior to said second setpoint target time;

transmitting at least the first and second setpoints to the thermostatic controller; and

setting at least said first setpoint at said first setpoint target time and said second setpoint at said second setpoint target time on a thermostatic controller used to control said climate control system.

10. A method as in claim 9 where said climate control system is a heating, ventilation and air conditioning system in a single family residence.

11. A method as in claim 9 in which at least one remote processor is in communication with said thermostatic controller.

12. A method as in claim 11 in which said remote processor is not located in the same structure as said thermostatic controller.

13. A method as in claim 11 in which said remote processor sets programming for said thermostatic controller.

14. A method as in claim 9 in which said thermostatic controller is programmable.

15. A method for minimizing the cycling time of an air conditioning system, said method comprising:

accessing stored data comprising a plurality of historic internal temperatures 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 one or more thermal performance values of said structure;

retrieving a target time at which a temperature in 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 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;

retrieving at least one performance characteristic of said air conditioning system;

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

calculating at least a first setpoint target time and a second setpoint target time based at least in part on said one or more thermal performance values of said structure, said at least one performance characteristic of the air conditioning system, said first internal temperature and said first external temperature, and the forecasted temperature,

where said second setpoint target time is prior to said target time, and said first setpoint target time is prior to said second setpoint target time;

transmitting the first setpoint and the second setpoint to the thermostatic controller; and

setting at least said first setpoint at said first setpoint target time and said second setpoint at said second setpoint target time on a thermostatic controller used to control a climate control system.

16. A method as in claim 15 where said climate control system is a heating, ventilation and air conditioning system in a single family residence.

17. A method as in claim 15 in which at least one remote processor is in communication with said thermostatic controller.

18. A method as in claim 17 in which said remote processor is not located in the same structure as said thermostatic controller.

19. A method as in claim 17 in which said remote processor sets programming for said thermostatic controller.

20. A method as in claim 15 in which said thermostatic controller is programmable.