Dynamic thermostat temperature compensation modeling and control in an HVAC system

Patent metadata

Field	Value
Publication number	US-10859280-B2
Application number	US-201715707347-A
Country	US
Kind code	B2
Filing date	Sep 18, 2017
Priority date	Apr 2, 2014
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

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.

First claim

What is claimed is:

1. 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 in an HVAC system for a building, the method comprising:
monitoring a temperature of a conditioned space in the building determined by a sensor in the HVAC system over a time period that includes:
a first period of time in which the HVAC system is operating, wherein during at least a portion of the first period of time, the monitored temperature is no longer changing; and
a second period of time in which the HVAC system is not operating, wherein during at least a portion of the second period of time, the monitored temperature is no longer changing; and
calculating, by the HVAC system controller, a first dynamic correction factor based on the temperature of the conditioned space in the building determined in the monitoring over the time period using a curve-fitting algorithm that fits a curve of the temperature of the conditioned space in the building determined in the monitoring over the time period.

2. The method according to claim 1 , further comprising:
enabling a cooling mode of the HVAC system.

3. The method according to claim 1 , further comprising:
enabling a heating mode of the HVAC system.

4. The method according to claim 1 , further comprising:
enabling one or more fans in the HVAC system.

5. The method according to claim 1 , wherein the sensor is external to the HVAC system controller.

6. The method according to claim 1 , further comprising: storing the first dynamic correction factor in a memory of the HVAC system controller.

7. The method according to claim 6 , further comprising: operating the HVAC system using the stored first dynamic correction factor.

8. 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 in a building, the method comprising:
determining over a time period, by an HVAC system controller, a temperature measurement of a conditioned space in the building, the time period including:
a first period of time in which the HVAC system is operating, wherein during at least a portion of the first period of time, the temperature measurement is no longer changing; and
a second period of time in which the HVAC system is not operating, wherein during at least a portion of the second period of time, the temperature measurement is no longer changing;
calculating, by the HVAC system controller, a first dynamic correction factor based on the determined temperature measurement of the conditioned space in the building using a curve-fitting algorithm that fits a curve of the determined temperature measurement of the conditioned space in the building over the time period;
modifying, by the HVAC system controller, a temperature measurement to be used by the HVAC system controller based on the first dynamic correction factor as calculated; and
controlling, with the HVAC system controller, the HVAC system based on the modified temperature measurement.

9. The method according to claim 8 , wherein calculating the first dynamic correction factor further comprises:
determining a state of the HVAC system based on an HVAC equipment.

10. The method according to claim 8 , wherein calculating the first dynamic correction factor further comprises determining a period of time the HVAC system has been in a current state.

11. The method according to claim 8 , wherein the first dynamic correction factor is applicable to a sensor from which the temperature measurement is determined.

12. The method according to claim 1 , further comprising calculating a second dynamic correction factor, wherein each of the first dynamic correction factor and the second dynamic correction factor are associated with a different state of the HVAC system.

13. The method according to claim 12 , further comprising selecting one of the first dynamic correction factor and the second dynamic correction factor to modify the temperature measurement.

14. The method according to claim 1 , wherein an actual temperature of the conditioned space is not changing during the second period of time.

15. The method according to claim 8 , further comprising calculating a second dynamic correction factor, wherein each of the first dynamic correction factor and the second dynamic correction factor are associated with a state of the HVAC system.

16. The method according to claim 15 , wherein modifying, by the HVAC system controller, the temperature measurement includes selecting one of the first dynamic correction factor and the second dynamic correction factor to modify the temperature measurement.

17. The method according to claim 8 , wherein an actual temperature of the conditioned space is not changing during the second period of time.

Assignees

• Trane Int Inc

Inventors

• Smith Christopher Blake
• Klein Kit W
• Wiltzius James J
• Land Iii Joseph George

Classifications

• F24F11/64 Primary

  using pre-stored data · CPC title

• F24F11/52

  Indication arrangements, e.g. displays · CPC title

• F24F11/0001 Primary

  for ventilation (F24F11/30 takes precedence) · CPC title

• F24F11/30 Primary

  for purposes related to the operation of the system, e.g. for safety or monitoring · CPC title

• Y02B30/70

  Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating · CPC title