HVAC start-up control system and method
First Claim
1. A method of controlling operation of a HVAC&
- R device to bring an interior temperature for a structure to a predetermined temperature setting at a predetermined time each day, the method comprising the steps of;
sensing a temperature both inside and outside a structure;
calculating a preliminary recovery time for a HVAC&
R device to drive the sensed temperature inside the structure to a predetermined temperature setting, the preliminary recovery time calculation being obtained by multiplying a difference between the sensed temperature inside the structure and the predetermined temperature setting by a previously calculated air treatment rate;
calculating a correction factor based upon multiplying a predetermined value by a difference between the sensed outside temperature and a previously sensed outside temperature;
calculating a corrected recovery time based on a sum of the calculated preliminary recovery time and the correction factor;
determining a starting time by subtracting the corrected recovery time from a predetermined time; and
initiating operation of the HVAC&
R device at the starting time.
1 Assignment
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Accused Products
Abstract
A controller controls operation of a HVAC&R device, bringing the temperature inside a structure from a first temperature to a second temperature at a predetermined time each day. Sensors sense the temperature both inside and outside the structure. A recovery time is calculated based upon a previously calculated air treatment rate of temperature recovery for the HVAC&R device to drive the temperature of the structure through a temperature change, the recovery time calculation being obtained by multiplying the difference between the sensed temperature inside the structure and the second temperature by the previously calculated air treatment rate. A correction factor is calculated based upon a relationship between the sensed outside temperature and a previously sensed outside temperature, the correction factor being added to obtain a corrected recovery time. The HVAC&R device is initiated at a time defined by the predetermined time subtracted from the corrected recovery time.
89 Citations
16 Claims
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1. A method of controlling operation of a HVAC&
- R device to bring an interior temperature for a structure to a predetermined temperature setting at a predetermined time each day, the method comprising the steps of;
sensing a temperature both inside and outside a structure;
calculating a preliminary recovery time for a HVAC&
R device to drive the sensed temperature inside the structure to a predetermined temperature setting, the preliminary recovery time calculation being obtained by multiplying a difference between the sensed temperature inside the structure and the predetermined temperature setting by a previously calculated air treatment rate;
calculating a correction factor based upon multiplying a predetermined value by a difference between the sensed outside temperature and a previously sensed outside temperature;
calculating a corrected recovery time based on a sum of the calculated preliminary recovery time and the correction factor;
determining a starting time by subtracting the corrected recovery time from a predetermined time; and
initiating operation of the HVAC&
R device at the starting time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- R device to bring an interior temperature for a structure to a predetermined temperature setting at a predetermined time each day, the method comprising the steps of;
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10. A controller for controlling operation of an HVAC&
- R device to bring an interior temperature for a structure to a predetermined temperature at a predetermined time each day, the controller comprising;
a first sensor for sensing a temperature inside a structure and a second sensor for sensing a temperature outside the structure;
a controller responsive to the first and second sensors and to real time for determining optimum start/stop times so that the structure reaches the second predetermined temperature at substantially the first predetermined time, the controller calculating a preliminary recovery time for a HVAC&
R device to drive the sensed temperature inside the structure to a predetermined temperature setting, the preliminary recovery time calculation being obtained by multiplying a difference between the sensed temperature inside the structure and the predetermined temperature setting by a previously calculated air treatment rate, the controller calculating a correction factor based upon multiplying a predetermined value by a difference between the sensed outside temperature and a previously sensed outside temperature, the controller calculating a corrected recovery time based on a sum of the calculated recovery time and the correction factor; and
wherein the controller initiating operation of the HVAC&
R device at a starting time defined by subtracting the corrected recovery time from a predetermined time. - View Dependent Claims (11, 12, 13, 14, 15, 16)
- R device to bring an interior temperature for a structure to a predetermined temperature at a predetermined time each day, the controller comprising;
Specification