JPS5568538A - High-frequency heating device - Google Patents

Abstract

PURPOSE:To enable temperature setting to be done easily even by an inexperienced people, by using rough temperature graduation for indication of heating target temperature and fine temperature graduation for indication of temperature actually measured by a temperature-detecting element. CONSTITUTION:When a temperature switch 7-1 is pressed and a volume 4's lever is shifted, the volume 4's resistance value is changed and a voltage V(+)1 to be impressed on a terminal of a comparator 2-1 is changed. At this time, as signals of 6 bits are generated in turn from an output terminal Z of a microcomputer 1, a voltage V(-) to be impressed on a minus input terminal of a comparator 2-1 is increased on a step-by-step basis. At a certain numbered step from the beginning, V(+) becomes smaller than V(-)(V(+)1<V(-)), and at this time, the microcomputer 1 takes in a signal from an X terminal and it, after having been converted to digital, a figure of last one digit is rounded up and a heating target temperature is indicated on an indicating device 6. And then, as heating is started, a measured value is indicated on the indicating device 6 according to an output of a temperature detecting element 5.