| 摘要 |
<p>PURPOSE:To vary in steps the set temperature which operates and stops a compressor for a temperature controller which is used for an air conditioner, by using a pair of push-button switches. CONSTITUTION:A temperature controller contains a thermistor 2, a comparator 1, a transistor and an auxiliary relay. The thermistor 2 and a resistance network circuit are connected to the terminals of the minus and plus sides of the comparator 1, respectively, and an analog switch 9 varies the combination of resistance network circuit. A counter 10 which is operated via a pair of push-buttons is connected to the switch 9. As a result, the plus-side input voltage of the comparator 1 cab be varied in steps.</p> |
