Method of controlling electric kettle for “dry” burn prevention
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United States of America Patent
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Aug 31, 2010
Grant Date -
Dec 18, 2008
app pub date -
Sep 10, 2005
filing date -
Sep 10, 2005
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Abstract
A method of controlling an electric kettle for “dry” burn prevention during heating process, including the steps of: providing a temperature sensor, a microprocessor, and a control circuit; detecting the water temperature; determining the temperature rate change and comparing the temperature rate change with the rate change threshold; and when the temperature rate change is larger than the preset rate change threshold, sending a control signal to the control circuit. The microprocessor determines the temperature rate change and the acceleration rate change that when the temperature rate change and acceleration rate change are larger than the corresponding thresholds respectively, the microprocessor sends the control signal to the control circuit to stop the heating process. Therefore, the present invention accurately determines the increasing temperature of the water and simultaneously cuts off the heating power to prevent the electric kettle from being burnt.
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