| 摘要 |
PROBLEM TO BE SOLVED: To give satisfactory induction heating action to a cooking container, by detecting a repulsive force acting on a heating coil when high-frequency power is supplied to the heating coil, and controlling the high-frequency power according to a detected result of the repulsive force. SOLUTION: When a switch input from an output setting switch 30 is present, high-frequency power is supplied so as to output, and a heating coil 3 generates high-frequency magnetic fields, whereby a cooking container is induction-heated. An electromagnetic repulsive force is generated between the heating coil 3 and the cooking container. This repulsive force is detected by a repulsive-force detecting means 27. The repulsive-force detecting means 27 can detect whether the repulsive force acting between the heating coil 3 and the cooking container is small or large, or varies or not. The high-frequency power is controlled according to a detected result of the repulsive-force detecting means 27 by a power control means in a control circuit 25, and therefore the high-frequency power can be adjusted according to the material of the cooking container or its floating condition. Cooking failure can be thus prevented. |
