INDUCTION HEATING DEVICE AND LOAD DETECTION METHOD IN INDUCTION HEATING DEVICE

In a multi-coil induction heating device, driver (4) supplies a first detection current which is a high frequency power to a plurality of heating coils (3) provided below a top panel on which a load is placed. Controller (50) determines whether a load is placed above the plurality of heating coils (3) based on an electric signal in response to the first detection current. When controller (50) determines that a load is not placed above the plurality of heating coils (3), driver (4) supplies a second detection current, which is a high frequency power and has a larger current value than the first detection current, to the plurality of heating coils (3). Controller (50) determines whether a load is placed above the plurality of heating coils (3) based on an electric signal in response to the second detection current. According to this aspect, energy-saving and accurate load detection is possible in a short time in the multi-coil induction heating device.