| 摘要 |
PROBLEM TO BE SOLVED: To solve problems that accuracy is inferior because temperatures are detected at one point and that, while a thermistor element or the like is brought into direct contact for measuring temperature of the top plate, a complicated fixing stopping tool is necessary for the contact. SOLUTION: This is an electromagnetic induction heating cooker provided with an inverter circuit to supply a high-frequency current to an induction heating coil, a differential amplification circuit to carry out differential amplification of electric power calculation signals and electric power setting signals, and a control treatment circuit to control output frequency of an inverter circuit corresponding to the differential amplification circuit. This has a non-contact temperature sensor to detect a temperature of the top plate by non-contacting, an electric power limiting circuit to reduce the output of the inverter circuit while a value of a temperature sensor signal is exceeding a second temperature-rise limit value, and a temperature protection circuit to cut off the output of the inverter circuit when the value of the temperature sensor signals exceeds the temperature-rise limit value which is the second temperature-rise limit value or more. COPYRIGHT: (C)2004,JPO&NCIPI |
