H - Electricity – 05 – B
Patent
H - Electricity
05
B
341/12, 309/34,
H05B 1/02 (2006.01) G05D 23/275 (2006.01) H05B 3/68 (2006.01)
Patent
CA 1198139
METHOD AND APPARATUS FOR LIMITING THE EVAPORATION RATE OF LIQUIDS HEATED BY COOKING APPLIANCE SURFACE UNITS ABSTRACT OF THE DISCLOSURE Method and apparatus for detecting the boiling point of liquids being heated by a cooking appliance and automatically reducing the output power of the heat source, once the boiling point has been reached, to a level which will sustain a desired evaporation rate, by measuring the initial weight of the liquid to be heated, energizing the heat source at a predetermined power level, periodically measuring the weight of the liquid as the heating process continues; computing the rate of change of the weight of the liquid, and reducing the power level of the heat source to a lower power level when the computed rate of change exceeds a reference rate and increasing the power level when the computed rate of change is less than the reference rate once the boiling point has been reached. The first occurrence of a measured weight decrease greater than the reference rate signifies that the boiling point of the liquid has been reached.
438674
Company General Electric
Eckersley Raymond A.
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