THERMOSTAT TEMPERATURE COMPENSATION MODELING

• US 20150285526A1
• Filed: 04/28/2014
• Published: 10/08/2015
• Est. Priority Date: 04/02/2014
• Status: Active Grant

• Current Assignee: Trane International Inc. (Trane Technologies plc)
• Original Assignee: Trane International Inc. (Trane Technologies plc)
• Inventors: SMITH, Christopher Blake, KLEIN, Kit W., WILTZIUS, James, LAND, Joseph George III
• Granted Patent: US 9,765,984 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F24F 11/0001 for ventilation F24F11/30 takes precedence
• 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 11/50 characterised by user interfaces or communication
• CPC Class Codes: F24F 11/52 Indication arrangements, e.g. displays
• CPC Class Codes: F24F 11/58 using Internet communication
• 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 11/80 for controlling the temperature of the supplied air
• CPC Class Codes: F24F 2110/00 Control inputs relating to air properties
• CPC Class Codes: G05D 23/1902 characterised by the use of a variable reference value
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

Systems and methods for configuring a temperature control system of a heating, ventilation, and air conditioning (HVAC) system controller are described. The HVAC system controller includes a processor in communication with a memory and a user interface. The processor is configured to determine a dynamic parameter related to a dynamic property of a conditioned space and maintain a controlled environment within the conditioned space by utilizing the dynamic parameter.

Claims

1. A heating, ventilation, and air conditioning (HVAC) system controller comprising:

a processor in communication with a memory and a user interface, wherein the processor is configured to;

determine a dynamic parameter related to a dynamic property of a conditioned space; and

maintain a controlled environment within the conditioned space by utilizing the dynamic parameter.

2. The HVAC system controller according to claim 1, wherein the dynamic property is moving air within the conditioned space.

3. The HVAC system controller according to claim 1, wherein the dynamic property is a temperature offset between air temperature and thermal mass temperature.

4. The HVAC system controller according to claim 1, wherein the dynamic property is the rate of change of temperature.

5. The HVAC system controller according to claim 4, wherein the dynamic property is a change of the rate of change of temperature.

29. The HVAC system controller according to claim 1, wherein the dynamic property is moving air within the conditioned space, the air being moved by one or more fans, at least one of the one or more fans having variable speeds.

6. A tangible computer accessible storage medium storing program instructions executable by a computer to execute a method for configuring a temperature control system of a heating, ventilation, and air conditioning (HVAC) system controller, the method comprising:

enabling one or more fans in an HVAC system for a fan-enabled time period;

monitoring temperature of a conditioned space determined by a sensor in the HVAC system during the fan-enabled time period;

disabling the one or more fans in the HVAC system for a fan-disabled time period;

monitoring temperature of the conditioned space by the sensor in the HVAC system during the fan-disabled time period; and

determining, by the HVAC system controller, a dynamic correction factor based on the temperatures monitored during the fan-enabled and fan-disabled time periods.

7. The method according to claim 6, further comprising:

enabling a cooling mode of the HVAC system during the fan-enabled time period.

8. The method according to claim 6, further comprising:

enabling a heating mode of the HVAC system during the fan-enabled time period.

9. The method according to claim 6, further comprising:

enabling all of the one or more fans in the HVAC system.

10. The method according to claim 6, wherein the sensor is external to the HVAC system controller.

11. The method according to claim 6, wherein determining the dynamic correction factor comprises:

calculating a curve-fit based on the monitored temperature data.

12. The method according to claim 6, further comprising:

storing the dynamic correction factor in a memory of the HVAC system controller.

13. The method according to claim 12, further comprising:

operating the HVAC system using the stored dynamic correction factor.

14. The method according to claim 6, further comprising:

entering the dynamic calibration mode in response to receiving a user input.

15. The method according to claim 6, further comprising:

entering the dynamic calibration mode periodically.

16. The method according to claim 7, further comprising:

predicting a thermal core temperature; and

performing one or more actions based on the thermal core temperature.

17. The method according to claim 16, wherein the one or more actions include one or more of notifying a user and modifying one or more settings of the heating and/or cooling modes.

30. The method according to claim 9, wherein at least one of the one or more fans in the HVAC system is a variable speed fan and the enabling all of the one or more fans in the HVAC system includes enabling at least one of the one or more fans at different speeds.

18. A tangible computer accessible storage medium storing program instructions executable by a computer to execute a method for controlling a heating, ventilation, and air conditioning (HVAC) system, the method comprising:

determining, by an HVAC system controller, a temperature measurement;

determining, by the HVAC system controller, a dynamic correction factor based on one or more dynamic parameters;

modifying, by the HVAC system controller, the temperature measurement based on the dynamic correction factor; and

controlling, with the HVAC system controller, the HVAC system based on the modified temperature measurement.

19. The method according to claim 18, wherein determining the dynamic correction factor further comprises:

determining a state of the HVAC system based on an HVAC equipment.

20. The method according to claim 18, further comprising:

determining the dynamic correction factor further comprises determining a period of time the HVAC system has been in a current state.

21. The method according to claim 18, further comprising:

determining whether a dynamic calibration mode has been executed.

22. The method according to claim 21, further comprising:

setting the dynamic correction factor to a static correction value in response to determining the dynamic calibration mode has not been executed.

23. The method according to claim 18, wherein the dynamic correction factor corresponds to a sensor from which the temperature measurement is determined.

24. The method according to claim 19, further comprising:

predicting a thermal core temperature; and

performing one or more actions based on the thermal core temperature.

25. The method according to claim 24, wherein the one or more actions include one of notifying a user and modifying one or more settings of heating and/or cooling modes.

26. A heating, ventilation, and air conditioning (HVAC) system controller, comprising:

a processor in communication with a memory and a user interface, wherein the processor is configured to;

enable one or more fans in an HVAC system for a fan-enabled time period;

monitor a temperature determined by a sensor in the HVAC system during the fan-enabled time period;

disable the one or more fans in the HVAC system for a fan-disabled time period;

monitor a temperature determined by a sensor in the HVAC system during the fan-disabled time period; and

determine a dynamic correction factor based on the temperatures monitored in the fan-enabled and the fan-disabled time periods.

27. The HVAC system controller according to claim 26, wherein the user interface is a color liquid crystal display.

28. The HVAC system controller according to claim 26, wherein the HVAC system controller is configured to be in communication with one or more sensors in the HVAC system.