Setback thermostat with recovery start time selected non-linearl

Details Setback thermostat with recovery start time selected non-linearl Setback thermostat with recovery start time selected non-linearl

1990-06-22

1991-06-25

Wayner, William E.

Automatic temperature and humidity regulation

With timing element

Timer other than clock

165 12, F23N 520

Patent

active

050259849

ABSTRACT:
A setback thermostat controlling a device which holds and changes the temperature in a space includes the capability of sensing and recording the difference between the time at which recovery to a new setpoint temperature occurs and the selected time at which this temperature is specified to be reached, and if the difference is nonzero, calculates a new time at which to begin recovery the next time a change to the new temperature is specified. The calculation of the time at which recovery begins takes account of the fact that greater time is required to achieve a one degree temperature change near the new setpoint temperature than far from it because of the additional thermal load on the space as temperature nears the new set point. A non-linear function is used to calculate the time at which recovery to the new temperature is begun. The invention is included in a method for operation of the device which changes the space's temperature.

REFERENCES:
patent: 4390959 (1983-06-01), Cabou
patent: 4522336 (1985-06-01), Culp
patent: 4660759 (1987-04-01), Barnard et al.
patent: 4706882 (1987-11-01), Barnard
patent: 4897798 (1990-01-01), Cler
patent: 4901917 (1990-02-01), Littell III

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