| 摘要 |
<p>PURPOSE:To form two thermostats in one body to reduce a cost, and to decrease the number of contacts to one to raise the reliability, by providing a themistor for detecting a temperature of an inlet and an outlet of a heat exchanger, a comparator, an NOR element and an auxiliary relay. CONSTITUTION:In order to control a temperature of a fluid by controlling an operation of a cooling machine, the first thermistor 3 for detecting a cooling fluid temperature of an inlet of a heat exchanger, the first comparator 8, and a temperature controlling volume 5 connected to the input side of the first comparator are provided. Also, in order to prevent freezing of the fluid, the second thermistor 10 for detecting a cooling fluid temperature of an outlet of the heat exchanger, and the second comparator 15 are provided. Furthermore, an NOR element 19 connected to the output side of the first comparator 8 and the second comparator 15, an auxiliary relay 20 connected to the output side of this NOR element 19, and a path of its contact 21 are provided.</p> |
