| 摘要 |
PURPOSE: A drink heater is provided to heat drink in a desired temperature using a temperature up button and a temperature down button. CONSTITUTION: A drink heater is composed of a generator, a heating plate, a power lamp, a temperature sensor, a temperature up button, a temperature down button, a reservation setting button, an LCD, a buzzer, and a control unit. The heating plate is heated by electric energy generated from the generator. The temperature sensor senses the present temperature of the heating plate. The control unit receives a signal sensed from the temperature sensor, and generates a switching control signal to maintain the heating temperature. And the control unit applies the switched power to the heating plate, and powers a timer. When heating operation of the heating plate is turned off, the control unit sends a control signal to the buzzer.
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