Patent ID: 8450665
Filing Date: 2013-05-28
Classification: H05B

Abstract:
1. An induction heating cooker comprising: a top plate on which a cooking container is placed, the top plate being made of a material capable of passing light; a heating coil operable to perform induction heating of the cooking container by having a high-frequency current flow therethrough; an infrared ray sensor having an incidence opening below the top plate and being adapted to detect infrared rays that have entered the incidence opening by passing through the top plate and being radiated from a bottom surface of the cooking container; a light emitting device for emitting light to a back surface of the top plate from a light emitting unit placed near the incidence opening; one or more operation units for inputting command information; a power-supply switch for causing a transition from a power-supply off state to a standby state, the power-supply off state being a state in which inputting operations through any of the operation units are not allowed, and the standby state being a state in which inputting of the command information through some of the operation units is allowed and a heating operation of the heating coil is stopped; and a heating control unit for controlling the heating coil based on an output of the infrared ray sensor to control an operation for heating the cooking container, wherein, based on a change of an output of the infrared ray sensor when the light emitting device changes a light output, the induction heating cooker determines whether or not there is a failure in the infrared ray sensor, and wherein, when an operation of the power-supply switch causes the transition from the power-supply off state to the standby state, the light emitting device starts a light emission with a first luminance, and after a lapse of a preset standby time since a stop of the operation for heating the cooking container at a heating-operation stopped state, the light emitting device stops the light emission or emits light with a second luminance that is lower than the first luminance.