Setback control for HVAC system
First Claim
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1. A system for controlling the temperature of an interior space, said system including a setpoint temperature control comprising:
- a clock timer for clocking a predetermined period of time which must elapse;
triggering logic for triggering said clock timer to begin the clocking of the predetermined period;
a counter for counting the number of times the predetermined period of time has elapsed;
temperature changing logic for changing the current setpoint temperature by a predefined amount each time a change occurs in the count of the number of times the predetermined period of time has elapsed; and
logic for suspending said temperature changing logic from changing the current setpoint temperature by a predetermined amount when the count of the number of times the predetermined period of time has elapsed reaches a predetermined number.
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Abstract
A setback control for an HVAC system is selectable by depressing a switch on a control panel associated with a programmed microprocessor. The programmed microprocessor is operative to thereafter change the setpoint temperature by a predefined amount each hour until a predetermined number of hours have passed. The set point temperature is thereafter held for a further hourly count before being returned to the starting setpoint temperature. The directional change in setpoint temperature is a function of whether the HVAC system is in a heating or cooling mode of operation.
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Citations
12 Claims
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1. A system for controlling the temperature of an interior space, said system including a setpoint temperature control comprising:
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a clock timer for clocking a predetermined period of time which must elapse; triggering logic for triggering said clock timer to begin the clocking of the predetermined period; a counter for counting the number of times the predetermined period of time has elapsed; temperature changing logic for changing the current setpoint temperature by a predefined amount each time a change occurs in the count of the number of times the predetermined period of time has elapsed; and logic for suspending said temperature changing logic from changing the current setpoint temperature by a predetermined amount when the count of the number of times the predetermined period of time has elapsed reaches a predetermined number. - View Dependent Claims (2, 3, 4, 5)
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6. A system for controlling the temperature of an interior space, said system including a setpoint temperature control comprising:
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a switch for selecting when a predefined control of the setpoint temperature is to be initiated; and a programmable processor connected to said switch for implementing the predefined control of the setpoint temperature when the switch selection is made, said programmable processor furthermore connected to a nonvolatile memory, said nonvolatile memory including; clock timing logic, executable by said programmable processor, for clocking a predetermined period of time which must elapse; counting logic, executable by said programmable processor, for counting the number of times the predetermined period of time has elapsed; logic, executable by said programmable processor, for changing the current setpoint temperature by a predefined amount each time a change occurs in the count of the number of times the predetermined period of time has elapsed; logic, executable by said programmable processor, for suspending said means for changing the current setpoint temperature by a predefined amount when the count of the predetermined period of time that has elapsed reaches a predetermined number. - View Dependent Claims (7, 8, 9)
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10. A process for controlling the setpoint temperature of an interior space, said process comprising the steps of:
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defining a predetermined period of time which must elapse; initiating a clocking of the predetermined period; counting the number of times the predetermined period of time has elapsed; changing the current setpoint temperature by a predefined amount each time a change occurs in the count of the number of times the predetermined period of time has elapsed; and suspending said step of changing the current setpoint temperature by a predetermined amount when the count of the number of times the predetermined period of time has elapsed reaches a predetermined number. - View Dependent Claims (11, 12)
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Specification