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When a pan made of a non-magnetic material, such as aluminum, is used for cooking while the temperature is being controlled, a notice is made to the user to the effect that the temperature control function has been stopped and that the temperature should be manually adjusted, when the material detec

When a pan made of a non-magnetic material, such as aluminum, is used for cooking while the temperature is being controlled, a notice is made to the user to the effect that the temperature control function has been stopped and that the temperature should be manually adjusted, when the material detection section detects that the pan is made of a non-magnetic material or a pan floating phenomenon has occurred, in order to prevent abnormal increase in the temperature of the pan due to incorrect temperature detection caused by the pan floating phenomenon, a set temperature is lowered.

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1. An induction heating apparatus comprising:a heating coil for induction heating a non-magnetic object to be heated having a conductively approximately the same as, or greater than the conductivity of aluminum and for induction heating an iron-based object to be heated; an inverter section for caus

1. An induction heating apparatus comprising:a heating coil for induction heating a non-magnetic object to be heated having a conductively approximately the same as, or greater than the conductivity of aluminum and for induction heating an iron-based object to be heated; an inverter section for causing a high frequency current to flow through said induction heating coil; a temperature sensor for detecting the temperature of said object to be heated; a temperature control section for controlling the temperature by adjusting the heat to output of said heating coil based on the detection result of said temperature sensor, and a material detection section for detecting the material of which an object to be located is made, wherein said temperature control section stops temperature control based on the detection result of said temperature sensor, or changes the conditions for temperature control in the case that said temperature control section recognizes heating of a non-magnetic object to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum; and said temperature control section recognizes heating of a non-magnetic object to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum on the basis of the detection result of said material detection section. 2. The induction heating apparatus according to claim 1, further comprising an object to be heated selection section for selecting whether a non-magnetic object to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum is heated, or an object to be heated that is made of another material is heated, whereinsaid temperature control section recognizes heating of a non-magnetic object to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum on the basis of the selection result of said object to be heated selection section. 3. The induction heating apparatus according to claim 1, further comprising a positional shift detection section for detecting a floating phenomenon or a positional shift of an object to be heated, whereinsaid temperature control section recognizes heating of a non-magnetic object to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum on the basis of the detection result of said positional shift detection section. 4. The induction heating apparatus according to claim 1, further comprising a reporting section for making a visual or auditory report to the user, whereinwhen the temperature control section recognizes facts that a non-magnetic object to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum is heated, and control of heat output based on the detection result of the temperature sensor is stopped, or the conditions for temperature control are changed, said reporting section informs the facts. 5. The induction heating apparatus according to claim 1, further comprising a reporting section for making a visual or auditory report to the user, whereinwhen said temperature control section recognizes fact that a non-magnetic object to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum is heated, said reporting section informs the facts. 6. An induction heating apparatus comprising:an induction heating coil provided in the vicinity of the position wherein an object to be heated such asa pan is placed; an inverter section for causing a high frequency current to flow through said induction heating coil; a material detection section for detecting whether said object to be heated is made of a magnetic material or is made of a non-magnetic material having a high conductivity; a positional shift detector for detecting a positional shift of said object to be heated relative to said induction heating coil; a temperature sensor for detecting the temperature of said object to be heated in order to control the temperature of said object to be heated; and a control section, to which the respective detection outputs of said temperature sensor, said material detection section and said positional shift detection section are inputted, for providing to said inverter section the control output that carries out temperature control of the object to be heated based on the detection output of said temperature sensor, and for stopping the operation of said temperature control, or for changing the conditions for temperature control, when one detection signal of a detection signal provided by said material detection section detecting a non-magnetic object to be heated having a high conductivity and a detection signal provided by said positional shift detector detecting a positional shift of the object to be heated, is inputted into said control section. 7. The induction heating apparatus according to claim 6, further comprising a reporting section for informing to a user facts that said control section has stopped the temperature control operation or changed the conditions for temperature control.8. The induction heating apparatus according to claim 6, further comprising an operating section by which a user instructs the stoppage of the temperature control operation when said object to be heated is of non-magnetic material having a high conductivity.9. The induction heating apparatus according to claim 6, whereinthe change in the conditions for temperature control carried out by said control section is to lower the temperature to be set. 10. An induction heating apparatus comprising:a top plate on which an object to be heated is placed; a first heating coil, provided on the side of said top plate opposite to a side placing an object to be heated, being capable of heating an iron-based object to be heated and an object to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum; a second heating coil being capable of heating objects to be heated other than objects to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum and an iron-based object to be heated; a first heating coil output adjustment section and a second heating coil output adjustment section for respectively supplying high frequency currents to said first heating coil and to said second heating coil; a temperature sensor for detecting the temperature of an object to be heated via said top plate; a temperature setting section for setting a control target temperature of an object to be heated; and a temperature control section for controlling the outputs of said first and second output adjustment sections in accordance with the output information from said temperature setting section so that the temperature of an object to be heated is controlled to the temperature corresponding to said control target temperature, wherein said temperature control section operates only when an iron-based object to be heated is heated by means of said first heating coil. 11. The induction heating apparatus according to claim 10, characterized in that said first heating coil has a number of windings greater than that of said second heating coil.12. The induction heating apparatus according to claim 10, further comprising a plurality of capacitors, connected to said first output adjustment section to form a resonator with said first heating coil, and a switching section for switching the capacitance of said plurality of capacitors.13. The induction heating apparatus according to claim 11, whereinsaid first heating coil output adjustment section for supplying a high frequency current to said first heating coil is formed so that the first heating coil output adjustment section can heat either an object to be heated having a conductivity approximately the same as, or greater than the conductivity of aluminum or an iron-based object to be heated. 14. The induction heating apparatus according to claim 10, characterized in that the rated output of said second heating coil output adjustment section for supplying a high frequency current to said second heating coil is greater than the rated output of said first heating coil output adjustment section for supplying a high frequency current to said first heating coil.15. The induction heating apparatus according to claim 10, characterized in that said first and second heating coils are in annular forms or in spiral forms, wherein the inner diameter of said first heating coil is greater than the inner diameter of said second heating coil, and in that said temperature sensor is provided in the vicinity of the center portion of said first heating coil.16. The induction heating apparatus according to claim 10, characterized in that the distance between said top plate and said first heating coil is greater than the distance between said top plate and said second heating coil.17. The induction heating apparatus according to claim 10, characterized by further comprising a cooling section for cooling the plurality of heating coil output adjustment sections for respectively supplying desired high frequency currents to said plurality of heating coils, wherein said first heating coil is placed at a position wherein the cooling effects due to said cooling section are of the maximum.18. The induction heating apparatus according to claim 1, whereinthe change in the conditions for temperature control carried out by said control section is to lower the temperature to be set.