Intelligent setpoint changeover for a programmable thermostat
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United States of America Patent
Stats
-
Mar 9, 1993
Grant Date -
N/A
app pub date -
Nov 8, 1991
filing date -
Nov 8, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus to match initiation of temperature changeover settings of a thermostat to a duty cycle of an air temperature conditioning plant without degrading the comfort level of the area of temperature modification. The apparatus prevents short-cycling of either a heating or a cooling system which can occur due to changes in the setpoint temperature. The apparatus operates by determining the length of time of 'on' portion and'off' portion of the duty cycle of the air temperature conditioning plant. It then determines the time until the upcoming cycle of the temperature conditioning plant and either advances or delays the temperature changeover until the beginning of the upcoming 'on' period or the upcoming 'off' period of the upcoming duty cycle, or the last 'on' period or the last 'off' period of the last duty cycle of the air temperature conditioning plant.
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Cited Art Landscape
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