Balanced utility load management

• US 7,172,132 B2
• Filed: 08/05/2004
• Issued: 02/06/2007
• Est. Priority Date: 08/05/2004
• Status: Active Grant

• Current Assignee: Carrier Corporation (Carrier Global Corporation)
• Original Assignee: Carrier Corporation (Carrier Global Corporation)
• Inventors: Roher, Michael A., Proffitt, Jerry L
• Primary Examiner(s): Jiang; Chen Wen
• Application Number:
  US10/912,297
• Publication Number:
  US 20060027669A1
• Time in Patent Office: 915 Days
• Field of Search: 236/1.C, 236/46.R, 236/46.F, 621/26, 621/57, 621/58, 165/267, 307/39, 700/295, 700/291, 700/297, 713/320, 713/321, 713/323
• US Class Current: 236/1.00C
• 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 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values

Abstract

A method and apparatus for controlling the operation of an air conditioning system and a plurality of auxiliary devices, with both the air conditioning system and the auxiliary devices being adapted to operate in a setback condition. The auxiliary devices are operated in a setback condition in response to the operation of the setback operation of the air conditioning system such that, generally, the auxiliary devices are operated in a setback condition when the air conditioning system is operating in a non-setback condition and vice versa so as to thereby achieve load balancing. In addition, the auxiliary devices can, at the same time, be operated in the setback mode on the basis of duty cycle.

Claims

1. A method of controlling the operation of a hybrid system that includes both a primary and at least one auxiliary device, both the primary and auxiliary devices being powered by a utility which is in communication with both the primary and auxiliary devices to selectively initiate respective setback operations thereof, comprising the steps of:

sending respective setback signals from the utility to both the primary and auxiliary devices to initiate respective setback conditions; and

determining the periods of time when the primary device is not operating in a setback condition and operating said auxiliary device in a setback condition during such periods.

2. A method as set forth in claim 1 wherein the step of operating said at least one auxiliary device in a setback condition is accomplished in a manner that also considers the duty cycle of the setback condition.

3. A method as set forth in claim 1 wherein said primary device is a comfort system.

4. A method as set forth in claim 1 wherein said at least one auxiliary device includes a plurality of devices selected from the group consisting of a pool pump, a pool heater, a hot water heater, and a hot tub.

5. A method as set forth in claim 1 wherein the step of sending respective setback signals is accomplished by way of a transceiver.

6. A method of balancing a load to a utility providing power to a primary and an auxiliary device with each device having a setback capability for temporarily reducing the power received from the utility, comprising the steps of:

periodically operating the primary device alternately in setback and non-setback conditions and operating the auxiliary device in opposite alternate non-setback and setback conditions such that the auxiliary device is operated in a setback condition when the primary device is operated in a non-setback condition, and the auxiliary device is operating in a non-setback condition when the primary device is operated in a setback condition.

7. A method as set forth in claim 6 and including the step of providing communication between the utility and the primary and auxiliary devices to selectively initiate the respective setback conditions.

8. A method as set forth in claim 7 wherein said communication providing step is accomplished by way of a transceiver.

9. A method as set forth in claim 6 wherein said primary device is a comfort system.

10. A method as set forth in claim 9 wherein a thermostat is included and the step of operating the primary device in a setback condition temporarily changes the setpoint of the thermostat.

11. A control system for managing the operation of a primary and at least one auxiliary device, with both said primary and said at least one auxiliary having the capability of being operated in a setback mode, comprising:

primary setback means for alternately initiating and terminating a setback condition of operation for the primary device; and

an auxiliary setback means responsive to said primary setback means to alternately terminate and initiate a setback mode of operation for the at least one auxiliary device such that the auxiliary device is operating in a setback mode when the primary device is operated in a non-setback mode and the auxiliary device is operating in a non-setback mode when the primary devices is operated in a setback mode.

12. A control system as set forth in claim 11 and including receiving means for receiving setback parameters for both the primary and the at least one auxiliary device.

13. A control system as set forth in claim 12 wherein said receiving means includes a transceiver.

14. A control system as set forth in claim 12 wherein said receiving means includes a microprocessor.

15. A control system as set forth in claim 11 wherein said primary device is a comfort system.

16. A control system as set forth in claim 15 wherein said comfort system includes a thermostat having a setpoint.