| 摘要 |
<p>The present invention discloses a method for determining whether water inside an electric kettle is boiling. The technical problem to be solved by the invention is to accurately detect whether water is boiling inside the electric kettle, and turn off the heating power supply when the water is boiling. The present invention comprising the following steps: (1) setting a temperature sensor, a microprocessor and a control circuit in the electric kettle; (2) detecting a temperature of the water inside the electric kettle, a temperature of a bottom heating unit which is in contact with the water, or a temperature of the sidewall of the electric kettle in real time by the sensor; (3) calculating a temperature change rate and comparing the temperature change rate with that of a period prior to the current period by the microprocessor; and (4) sending a signal to the control circuit when the temperature change rate decreases and reaches a minimum value. Compared with the prior art, the present invention adopts a microprocessor to determine whether the water inside the electric kettle is boiling according to the variation of the temperature change rate during the heating process, and send a signal to the control circuit to turn off the heating power supply when the water is boiling. The present invention provides an accurate method of determining the water boiling inside the electric kettle and provides a timely control of power-breaking to avoid any potential safety hazard and accident.</p> |
