Induction heating apparatus having electrostatic shielding member

An induction heating apparatus comprising:

• an induction heating coil for generating a high-frequency magnetic field and heats an object to be heated;
• an inverter circuit for driving said induction heating coil;
• a conductive shielding member provided between said object to be heated and said induction heating coil and electrically connected to a low-potential part;
• a sensing portion for applying to the shielding member a voltage different from a voltage generated by said induction heating coil and sensing a conduction condition of said shielding member;
• and
• a control portion for controlling said inverter circuit based on the conduction condition,
• wherein under a condition where said induction heating coil is energized, the sensing of the conduction condition of said shielding member by said sensing portion substantially inhibited or a sensing result of said sensing portion is invalidated.

An induction heating apparatus comprising:

• an induction heating coil for generating a high-frequency magnetic field and heats an object to be heated;
• an inverter circuit for driving said induction heating coil;
• a conductive shielding member provided between said object to be heated and said induction heating coil and electrically connected to a low-potential part;
• a sensing portion for applying to the shielding member a voltage different from a voltage generated by said induction heating coil and sensing a conduction condition of said shielding member;
• and
• a control portion for controlling said inverter circuit based on the conduction condition,
• wherein a different voltage is applied to said induction heating coil according to when said object to be heated is magnetic or non-magnetic and high in resistance and when said object to be heated is non-magnetic and low in resistance, and said control portion controls said inverter circuit based on the conduction condition only when said object to be heated is non-magnetic and low in resistance.