Variable capacity climate control system for multi-zone space

• US 20060186213A1
• Filed: 02/23/2005
• Published: 08/24/2006
• Est. Priority Date: 02/23/2005
• Status: Active Grant

• Current Assignee: Copeland Comfort Control LP (Emerson Electric Company)
• Original Assignee: Emerson Electric Company
• Inventors: Carey, Steven L., Fredricks, Thomas J., Edgar, Jeff
• Granted Patent: US 7,354,005 B2
• Time in Patent Office: Days
• US Class Current: 236/1.B
• 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 11/38 Failure diagnosis
• CPC Class Codes: F24F 11/56 Remote control
• CPC Class Codes: F24F 11/74 for controlling air flow rate or air velocity
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: F24F 2110/00 Control inputs relating to air properties
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 3/0442 with volume control at a constant temperature
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

A climate control system having two or more stages of cooling operation or heating operation is provided for supplying conditioned air to a plurality of zones within a space, where the climate control system comprises a plurality of controllable zone dampers for controlling the supply of conditioned air to each of the plurality of zones, and a plurality of zone temperature sensors for periodically sensing temperature at preset intervals and transmitting sensed temperature information when the temperature of the zone has changed by more than a predetermined amount. The climate control system further comprises a thermostat that is adapted to initiate operation of the circulating air blower and the cooling system at less than full capacity when at least one zone temperature sensor transmits a sensed temperature that differs from the set point temperature by more than a specific amount, wherein the thermostat switches the circulating air blower and cooling system to full capacity operation when either the cooling system has operated at less than full capacity for more than a predetermined time or when more than a predetermined number of zone temperature sensors transmit sensed temperatures that differ from the set point temperature by more than a specific amount.

Claims

1. A climate control system having two or more stages of cooling operation for supplying conditioned air to a plurality of zones within a space to be conditioned, the system comprising:

a plurality of zone temperature sensors for periodically sensing temperature at preset intervals, and for transmitting sensed temperature information when the temperature of the zone has changed by more than a predetermined amount;

a plurality of controllable zone dampers for controlling the supply of conditioned air to each of the plurality of zones in the space;

a multi-speed circulating air blower for varying the flow rate of conditioned air to be supplied to the zones; and

a thermostat capable of receiving transmitted temperature information from the plurality of zone temperature sensors, where the thermostat responsively initiates the operation of the circulating air blower and cooling system at less than full capacity when at least one zone temperature sensor transmits a sensed temperature that differs from the set point temperature by more than a specific amount, and the thermostat responsively initiates the opening of one or more controllable zone dampers corresponding to the at least one zone temperature sensor which transmitted a sensed temperature differing from the set point temperature by more than a specific amount to supply conditioned air to the at least one zone; and

wherein the thermostat discontinues the use of temperature information from the at least one zone temperature sensor and displays a system error if the at least one zone temperature sensor does not transmit a significant change in sensed temperature for the at least one zone after a predetermined period of cooling system operation.

2. The climate control system of claim 1 wherein the thermostat switches the circulating air blower and cooling system to full capacity operation when either the cooling system has operated at less than full capacity for more than a predetermined time or when more than a predetermined number of zone temperature sensors transmit sensed temperatures that differ from the set point temperature by more than a specific amount.

3. The climate control system of claim 2 further comprising a heating system having two or more stages of operation, wherein the thermostat is adapted to initiate operation of the circulating air blower and the heating system at less than full capacity when at least one zone temperature sensor transmits a sensed temperature that differs from the set point temperature by more than a specific amount, and the thermostat responsively initiates the opening of one or more controllable zone dampers corresponding to the at least one zone temperature sensor which transmitted a sensed temperature differing from the set point temperature by more than a specific amount to supply conditioned air to the at least one zone.

4. The climate control system of claim 3 wherein the thermostat switches the circulating air blower and heating system to full capacity operation when either the heating system has operated at less than full capacity for more than a predetermined time or when more than a predetermined number of zone temperature sensors transmit sensed temperatures that differs from the set point temperature by more than a specific amount.

5. The climate control system of claim 4 wherein the thermostat switches a controllable zone damper to a closed position when the sensed temperature transmitted by the zone temperature sensor corresponding to the controllable zone damper is at the set point temperature or within a specific amount.

6. The climate control system of claim 5 wherein the plurality of zone temperature sensors are battery powered and are configured to periodically sense temperature at extended preset intervals to reduce transmission frequency and prolong battery life upon sensing a temperature change of less than a minimum amount that is indicative of conditioned air not being supplied to the zone.

7. The climate control system of claim 6 wherein the plurality of zone temperature sensors are configured to periodically sense temperature at shortened preset intervals upon sensing more than a preset temperature change that is indicative of conditioned air being supplied to the zone.

8. The climate control system of claim 1 wherein each of the plurality of zone temperature sensors further comprise user input means for offsetting the sensed temperature value by a user selected amount, to allow the user to adjust the temperature of the zone to the user'"'"'s preference.

9. The climate control system of claim 1 wherein each of the plurality of zone temperature sensors further comprise a user input means for selecting a temporary unoccupied mode in which the temperature sensor transmits an inactive status to the controller for a predetermined time period.

10. The climate control system of claim 1 wherein each of the plurality of zone temperature sensors further comprise a user input means for selecting an off mode in which the temperature sensor transmits an inactive status to the thermostat.

11. The climate control system of claim 8, wherein the controllable zone dampers and zone temperature sensors in communication with the thermostat communicate via wireless RF transmission.

12. A climate control system having two or more heating and cooling stages of operation for supplying conditioned air to a plurality of zones within a space to be conditioned, the system comprising:

a plurality of battery powered zone temperature sensors for sensing temperature at preset intervals, the temperature sensor being configured to transmit temperature information only when the sensed temperature has changed by more than a predetermined amount so as to reduce transmissions and prolong battery life when conditioned air is not being supplied to the space;

a plurality of controllable zone dampers for controlling the supply of conditioned air to each of the plurality of zones in the space;

a multi-speed circulating air blower for varying the flow rate of conditioned air to be supplied to the zones;

a thermostat for receiving transmitted temperature information from the plurality of zone temperature sensors and controlling the operation of the two or more heating and cooling stages and plurality of zone dampers to supply conditioned air to the plurality of zones, the thermostat being adapted to initiate operation of the circulating air blower and heating or cooling system at less than full capacity when fewer than a predetermined number of zones have a sensed temperature that differ from the set point temperature by more than a predetermined amount, and to switch the circulating air blower and heating or cooling system from less than full capacity operation to full capacity operation after either a predetermined time period of less than full capacity operation has transpired or when more than a predetermined number of zones have a sensed temperature that differ from the set point temperature by more than a predetermined amount.

13. The climate control system of claim 12 wherein thermostat switches a controllable zone damper to an open position when the difference between the set point temperature and the sensed temperature transmitted by the zone temperature sensor corresponding to the controllable zone damper is more than a predetermined amount.

14. The climate control system of claim 13 wherein the thermostat switches a controllable zone damper to a closed position when the difference between the set point temperature and the sensed temperature transmitted by the zone temperature sensor corresponding to the controllable zone damper is less than a predetermined amount.

15. The climate control system of claim 14 wherein each of the plurality of zone temperature sensors further comprise user input means for offsetting the sensed temperature value by a user selected amount, to allow the user to adjust the temperature of the zone to the user'"'"'s preference.

16. The climate control system of claim 15 wherein the zone temperature sensor adds the user selected offset value to the sensed temperature, for transmission to the thermostat.

17. The climate control system of claim 16 wherein each of the plurality of zone temperature sensors further comprise a user input means for selecting a temporary unoccupied mode in which the temperature sensor transmits an inactive status to the thermostat for a predetermined time period.

18. A climate control system having two or more heating and cooling stages of operation for supplying conditioned air to a plurality of zones within a space to be conditioned, the system comprising:

a plurality of battery powered zone temperature sensors for sensing the temperature in a zone at a preset frequency, the temperature sensor being configured to transmit temperature information only when the sensed temperature has changed by more than a predetermined amount so as to reduce transmissions and prolong battery life when conditioned air is not being supplied to the space;

a plurality of controllable zone dampers for controlling the supply of conditioned air to each of the plurality of zones in the space;

a multi-speed circulating air blower for varying the flow rate of conditioned air to be supplied to the zones;

a thermostat for receiving transmitted temperature information from the zone temperature sensors and controlling the operation of the two or more heating and cooling stages and plurality of zone dampers to supply conditioned air to the plurality of zones, wherein the thermostat initiates operation of the circulating air blower and heating or cooling system at less than full capacity when a single zone temperature sensor transmits a temperature value that differs from the set point temperature by more than a predetermined amount, and the thermostat switch the circulating air blower and heating or cooling system from less than full capacity operation to full capacity operation when more than two zone temperature sensors transmit temperature values that differ from the set point temperature by more than a predetermined amount.

19. The climate control system of claim 18 wherein thermostat switches a controllable zone damper to an open position when the difference between the set point temperature and the sensed temperature of the zone corresponding to the controllable zone damper is more than a predetermined amount, and the thermostat switches the controllable zone damper to a closed position when the difference between the set point temperature and the sensed temperature of the zone corresponding to the controllable zone damper is less than a predetermined amount.

20. The climate control system of claim 19 wherein each of the plurality of zone temperature sensors further comprise user input means for offsetting the sensed temperature value by a user selected amount, wherein the zone temperature sensor adds the user selected offset value to the sensed temperature for transmission to the thermostat for allowing the user to adjust the temperature of the zone to the user'"'"'s preference.

21. The climate control system of claim 19 wherein the thermostat switches the circulating air blower and heating or cooling system from less than full capacity operation to full capacity operation after a predetermined time period of less than full capacity operation has transpired.

22. The climate control system of claim 19, further comprising a hand held remote control having user input means, wherein the hand held remote control is capable of transmitting signals to the thermostat to provide information as to which zone the hand-held remote control is presently in.