Patent ID: 8853599

Claim:
An induction heating cooking apparatus comprising: a main body; a top plate mounted on an upper surface of the main body to place a cooking container thereon; a heating coil disposed below the top plate to heat the cooking container; a plurality of ferrite materials disposed below the heating coil so as to extend radially from a center of the heating coil; a heating coil holding plate holding the heating coil and the ferrite materials; an infrared sensor disposed below the top plate to detect infrared rays emitted from the cooking container; a control circuit disposed below the ferrite materials and comprising an inverter circuit operable to generate a high frequency current to be supplied to the heating coil and a semiconductor element operable to drive the inverter circuit, the control circuit controlling an output of the heating coil depending on an output from the infrared sensor; a heat sink on which the semiconductor element is mounted, wherein the heat sink operable to cool the semiconductor element mounted thereto; a magnetic flux-shielding plate interposed between the ferrite materials and the control circuit and, the magnetic flux-shielding plate being divided from the heat sink, the magnetic flux-shielding plate that supports the heating coil and the ferrite from below, and the magnetic flux-shielding plate being made of a metal plate to shield magnetic flux leakage downward from the ferrite materials; a fan operable to convey cooling air to cool the control circuit and the heat sink; and a duct that leads another flow of the cooling air from the fan toward neighborhood of the infrared sensor; wherein the infrared sensor is positioned below the magnetic flux-shielding plate, and the fan conveys the cooling air to the heat sink and the another flow of the cooling air to the neighborhood of the infrared sensor below the magnetic flux-shielding plate through the duct.