| 摘要 |
PURPOSE:To prevent securely the accident such as a burn and the like after stopping of electrifying by the flashing action of a display means until the temperature of a heating means and its periphery part becomes lower than the designated temperature, when the setting of the electrifying quantity is designated at zero after the heating means is electrified. CONSTITUTION:When an output from a variable resistor 4 and an output from a temperature detector 2, as a setting means of electrifying quantity, are inputted into a microcomputer 1 via A/D converters 5, 3, the microcomputer 1 generates a control signal due to said both signals, turns a double-throw thyristor 8 ON via a transistor 11 and a photo-coupler 10, then a heating means 7 is heated by electrifying. At this time, determined number of LEDs 12-21 due to the setting data of a electrifying quantity from the variable resistor 4 are lighted. Thereafter, when the electrifying for the heating means 7 is stopped and the electrifying quantity becomes zero, the LEDs 12-21 are turned flashing action during the judgement of high temperature due to the temperature judgement means of the temperature detector 2, accordingly, the attention is called. |
