Thermostat with air conditioning load management feature

• US 6,622,926 B1
• Filed: 10/16/2002
• Issued: 09/23/2003
• Est. Priority Date: 10/16/2002
• Status: Expired due to Term

• Current Assignee: Copeland Comfort Control LP (Emerson Electric Company)
• Original Assignee: Emerson Electric Company
• Inventors: Sartain, John M., Toth, Bartholomew L.
• Primary Examiner(s): WAYNER, WILLIAM E
• Application Number:
  US10/065,427
• Time in Patent Office: 342 Days
• Field of Search: 236/46.R, 236/47, 236/78.D, 622/31
• US Class Current: 236/46.00R
• 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 11/52 Indication arrangements, e.g. displays
• 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: G05D 23/1904 variable in time

Abstract

A thermostat comprising a software sub-routine for controlling the operation of an air conditioner and a stored value representative of the air conditioner'"'"'s operating and non-operating time, which is indicative of the outdoor temperature and load on the air conditioning system. The stored value representative of operating time is evaluated by the software sub-routine, which responsively raises the set-point temperature when the stored value exceeds a predetermined level indicative of a high outdoor temperature. The economy feature can be manually enabled, or remotely enabled via an input signal from a phone or Internet connection.

Claims

1. A control system for controlling the operation of an air conditioning system comprising:

a set point temperature for controlling the energizing or de-energizing of the air conditioning system;

a stored value representative of the cumulative operating time of the air conditioning system less the cumulative non-operating time of the air conditioning system; and

a control means for evaluating the stored value and responsively increasing the set point temperature by a first amount when the stored value exceeds a first predetermined amount, and increasing the set point temperature by a second amount when the stored value exceeds a second predetermined amount.

2. The control system according to claim 1, wherein the control means responsively increases the set point temperature independent of a sensed outdoor temperature.

3. The thermostat according to claim 2, wherein the control means comprises a microprocessor having a software program for controlling the operation of the air conditioning system.

4. A control system for selectively reducing the operation of an air conditioning system comprising:

a set point temperature for controlling the energizing or de-energizing of the air conditioning system;

a stored value representative of the operating time of the air conditioning system less the non-operating time of the air conditioning system;

a selectable mode having an on or off position; and

a control means for evaluating the stored value and responsively increasing the set point temperature by a first amount when the stored value exceeds a first predetermined amount, and increasing the set point temperature by a second amount when the stored value exceeds a second predetermined amount, only when the selectable mode is in an on position.

5. The control system according to claim 4, wherein the control means responsively alters the set point temperature independent of a sensed outdoor temperature.

6. The control system according to claim 4, wherein the control means comprises a microprocessor having a software program for controlling the operation of the air conditioning system.

7. The control system according to claim 6, wherein the selectable mode is selected to an on or off position by manually pressing an input device to the control system.

8. The control system according to claim 7, wherein the selectable mode is remotely selected to an on or off position by an external signal input to the microprocessor of the control system.