JPS6422212A - Electric rice cooker - Google Patents

Abstract

PURPOSE: To enable correct detection of boiling even in continuous rice cooking by controlling a heater to keep a pot at a low temperature for a determined period or until a temperature sensor detects a temperature higher than a predetermined value. CONSTITUTION: A thermosensitive unit 9 projects practically from the center of a heating plate 6, contacts with the outer base surface of an inner pot 8, and has a negative characteristics first thermistor 10 in it. A negative characteristics second thermistor 16 is provided near to a steam hole 14 on the upper surface of a base plate 13 of an outer lid 11. Prescribed amounts of water and rice are put into the inner pot 8 and an AC power source 20 is driven. A starting switch 27 is made ON and it is assumed that the detected temperature at the second thermistor 16 is higher than θ2 (for example, 70 deg.C) as in continuous cooking. At this time, the CPU 29A makes a heater 7 generate heat until the detection temperature at the first thermistor 10 becomes higher than θ1 (for example, 48 deg.C). When the detected temperature at the first thermistor 10 becomes higher than θ1, the current is shut off for 8 minutes, for example. In this way, the pot 8 is kept at a low temperature to cool a temperature sensor.