HVAC control system having integrated CPH cycling control and deadband staging
First Claim
1. A method of controlling a heating, ventilation, and air-conditioning (“
- HVAC”
) system, the method comprising;
programming a thermostat of the HVAC system to define a temperature set point, a temperature differential around the temperature set point, and a number of cycles per hour for a temperature control source of the HVAC system;
sensing a temperature;
executing a cycling control algorithm that includes the temperature, the temperature set point, and the number of cycles per hour as inputs to determine a duty cycle;
running the temperature control source according to the duty cycle when the temperature is within the temperature differential; and
executing a deadband algorithm to turn on the temperature control source when the temperature is outside of the temperature differential at one extreme and to turn off the temperature control source when the temperature is outside the temperature differential at the opposite extreme.
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Accused Products
Abstract
A method of controlling an HVAC system including programming a thermostat of the HVAC system to define a temperature set point, a temperature differential around the temperature set point, and a number of cycles per hour for a temperature control source of the HVAC system. The method also includes sensing a temperature, executing a cycling control algorithm that includes the temperature, the temperature set point, and the number of cycles per hour as inputs to determine a duty cycle, and running the temperature control source according to the duty cycle when the temperature is within the temperature differential. The method further includes executing a deadband algorithm to turn on the temperature control source when the temperature is outside of the temperature differential at one extreme and to turn off the temperature control source when the temperature is outside the temperature differential at the opposite extreme.
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Citations
20 Claims
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1. A method of controlling a heating, ventilation, and air-conditioning (“
- HVAC”
) system, the method comprising;programming a thermostat of the HVAC system to define a temperature set point, a temperature differential around the temperature set point, and a number of cycles per hour for a temperature control source of the HVAC system; sensing a temperature; executing a cycling control algorithm that includes the temperature, the temperature set point, and the number of cycles per hour as inputs to determine a duty cycle; running the temperature control source according to the duty cycle when the temperature is within the temperature differential; and executing a deadband algorithm to turn on the temperature control source when the temperature is outside of the temperature differential at one extreme and to turn off the temperature control source when the temperature is outside the temperature differential at the opposite extreme. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- HVAC”
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14. A thermostat for controlling a temperature control source, the thermostat comprising:
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a temperature sensor operable to sense a temperature within a room and to generate a signal representative of the temperature; and a controller in electronic communication with the temperature sensor and configured to receive the signal; wherein the controller is configured to define a temperature set point, a temperature differential around the temperature set point, and a number of cycles per hour for the temperature control source, wherein the controller is configured to determine a duty cycle by executing a cycling control algorithm that includes the temperature, the temperature set point, and the number of cycles per hour as inputs, wherein the controller is configured to run the temperature control source according to the duty cycle when the temperature is within the temperature differential, and wherein the controller is configured to execute a deadband algorithm to turn on the temperature control source when the temperature is outside of the temperature differential at one extreme and to turn off the temperature control source when the temperature is outside the temperature differential at the opposite extreme. - View Dependent Claims (15, 16)
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17. A thermostat for controlling a heating source and a cooling source, the thermostat comprising:
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a temperature sensor operable to sense a temperature within a room and to generate a signal representative of the temperature; and a controller in electronic communication with the temperature sensor and configured to receive the signal; wherein the controller is configured to define a heating temperature set point, a heating temperature differential around the heating temperature set point, a heating number of cycles per hour for the heating source, a cooling temperature set point, a cooling temperature differential around the cooling set point, and a cooling number of cycles per hour for the cooling source, wherein the controller is configured to determine a heating duty cycle by executing a heating cycling control algorithm that includes the temperature, the heating temperature set point, and the heating number of cycles per hour as inputs, wherein the controller is configured to run the heating source according to the heating duty cycle when the temperature is within the heating temperature differential, wherein the controller is configured to determine a cooling duty cycle by executing a cooling cycling control algorithm that includes the temperature, the cooling temperature set point, and the cooling number of cycles per hour as inputs, and wherein the controller is configured to execute a deadband algorithm to turn on the heating source when the temperature is less than the heating temperature differential, to turn off the heating source when the temperature is greater than the heating temperature differential, to turn on the cooling source when the temperature is greater than the cooling temperature differential, and to turn off the cooling source when the temperature is less than the cooling temperature differential. - View Dependent Claims (18, 19, 20)
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Specification