Time-based setback recovery
First Claim
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1. A heating, ventilation and air-conditioning system, comprising:
- a system controller configured to control the operation of a demand unit to maintain a comfort characteristic setpoint of a conditioned space; and
a setback determination module of said system controller configured to determine a setback value of said setpoint based on a recovery time from said setback value to said setpoint, wherein;
said recovery time is selected by an operator of said heating, ventilation and air conditioning system; and
said setback value is determined, based on said selected recovery time and one or more measured local environmental conditions, using a plurality of tables, wherein each table of the plurality of tables corresponds to a particular outdoor air temperature, and includes a plurality of recovery time values corresponding to combinations of a comfort characteristic setpoint value and an internal air temperature at the particular outdoor air temperature.
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Abstract
A system controller of a heating, ventilation and air-conditioning system is configured to control the operation of a demand unit to maintain a comfort characteristic setpoint of a conditioned space. The controller includes a setback calculation module that is configured to calculate a setback value of the setpoint as a function of a recovery time from the setback value to the setpoint.
14 Citations
28 Claims
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1. A heating, ventilation and air-conditioning system, comprising:
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a system controller configured to control the operation of a demand unit to maintain a comfort characteristic setpoint of a conditioned space; and a setback determination module of said system controller configured to determine a setback value of said setpoint based on a recovery time from said setback value to said setpoint, wherein; said recovery time is selected by an operator of said heating, ventilation and air conditioning system; and said setback value is determined, based on said selected recovery time and one or more measured local environmental conditions, using a plurality of tables, wherein each table of the plurality of tables corresponds to a particular outdoor air temperature, and includes a plurality of recovery time values corresponding to combinations of a comfort characteristic setpoint value and an internal air temperature at the particular outdoor air temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 27, 28)
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10. A method of operating a heating, ventilation and air-conditioning system, comprising:
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configuring a system controller to control the operation of a demand unit to maintain a comfort characteristic setpoint of a conditioned space; and configuring a setback determination module of said system controller to determine a setback value of said setpoint based on a recovery time from said setback value to said setpoint; wherein; said recovery time is selectable by an operator of said heating, ventilation and air-conditioning system; and said setback value is determined, based on said selected recovery time and one or more measured local environmental conditions, using a plurality of tables, wherein each table of the plurality of tables corresponds to a particular outdoor air temperature, and includes a plurality of recovery time values corresponding to combinations of a comfort characteristic setpoint value and an internal air temperature at the particular outdoor air temperature. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A heating, ventilation and air-conditioning system controller, comprising:
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a processor; and a memory containing instructions, wherein; said instructions are configured to control the operation of a demand unit to maintain a comfort characteristic setpoint of a conditioned space, and to determine a setback value of said setpoint based on a recovery time from said setback value to said setpoint; said recovery time is selectable by an operator of a heating, ventilation and air-conditioning system associated with said heating, ventilation and air-conditioning system controller; and said setback value is determined, based on said selected recovery time and one or more measured local environmental conditions, using a plurality of tables, wherein each table of the plurality of tables corresponds to a particular outdoor air temperature, and includes a plurality of recovery time values corresponding to combinations of a comfort characteristic setpoint value and an internal air temperature at the particular outdoor air temperature. - View Dependent Claims (21, 22, 23)
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24. A heating, ventilation and air-conditioning system controller, comprising:
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a processor; and a memory containing a plurality of tables, wherein each table of the plurality of tables corresponds to a particular outdoor air temperature, and includes a plurality of recovery time values corresponding to combinations of a comfort characteristic setpoint value and an internal air temperature at the particular outdoor air temperature, wherein; said processor is configured to maintain a comfort characteristic setpoint of a conditioned space using a setback value of said setpoint determined based on a recovery time; said recovery time is selectable by a user of a heating, ventilation and air-conditioning system associated with said heating, ventilation and air-conditioning system controller; and said setback value is determined, using the plurality of tables, based on said recovery time and one or more measured local environmental conditions. - View Dependent Claims (25, 26)
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Specification