Induction heating apparatus

An induction heating apparatus comprising:

• a heating coil comprising a first heating coil, a second heating coil provided inside the first heating coil, and an intermediate point to which the first heating coil and the second heating coil are connected;
• an inverter is provided in a full-bridge type in which a first arm and a second arm are connected in parallel, wherein each of the first arm and the second arm comprises two switching elements connected in series;
• a first relay provided between a first node and one end of the first heating coil, wherein the first node is an intermediate node arranged between the switching elements of the first arm of the inverter;
• a capacitor provided between the end of the first heating coil and the first node of the inverter;
• a second relay provided between a second node of the second arm of the inverter and the intermediate point of the heating coil;
• a third relay provided between the second node of the inverter and an end of the second heating coil, wherein the end of the second heating coil is on the opposite side of the intermediate point to which the first heating coil and the second heating coil are connected;
• and
• a processor configured to:
• detect a presence or an absence of a container on the heating coil, based on an output current of the inverter, and
• open or close the first relay based on a detection result of the container.