Electric heating – Inductive heating – With heat exchange
Patent
1994-02-22
1995-04-18
Leung, Philip H.
Electric heating
Inductive heating
With heat exchange
219627, 219667, 219494, H05B 606
Patent
active
054080738
ABSTRACT:
An overheat prevention circuit for an electromagnetic induction heating cooker. The electromagnetic induction heating cooker has a heating coil, a top plate disposed over the heating coil, on which an object to be heated is laid, a temperature sensing part for sensing a temperature of the object and a high-frequency power generation part for generating a high-frequency magnetic field to the heating coil to induction-heat the object. The overheat prevention circuit comprises a temperature sense processing circuit for sensing the temperature of the object and outputting a signal as a result of the sensing, a power block processing circuit for blocking power supply to the high-frequency power generation part when an internal temperature of the cooker exceeds a predetermined reference value and outputting a signal as a result of the blocking, and a control unit for discriminating an overheated state of the cooker in response to the output, signals from the temperature sense processing circuit and power block processing circuit and, in accordance with the discriminated result, controlling an operation of the high-frequency power generation part, outputting a cooling fan drive signal to cool the cooker and outputting a control signal to inform the user of the overheated state of the cooker.
REFERENCES:
patent: 3710062 (1973-01-01), Peters, Jr.
patent: 3804968 (1974-04-01), Mosser
patent: 4191875 (1980-03-01), Cunningham
patent: 4638135 (1987-01-01), Aoki
Leung Philip H.
Samsung Electronics Co,. Ltd.
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