| 摘要 |
<p>PURPOSE:To economize in energy, by providing a room temperature detecting circuit part in the basic circuit part. CONSTITUTION:The device consists of a temperature detecting circuit part A, a control circuit part B which issues a signal for driving a relay, a heating unit control part C, a DC power supply circuit part D for the control circuit part B and the heating unit control part C, and a room temperature detecting circuit part E which detects an atmospheric temperature to control the temperature in cooperation with the control circuit part B. When the room temperature becomes a set temperature, an output voltage is generated from the output part of a comparator 10, and the signal is inputted to the base of a transistor TR12 to turn on the TR12, and the circuit between the gate and the cathode of a thyristor 8 for driving a relay of the heating unit control part is held in the short-circuit state to make the thyristor non-conductive. While the room temperature is high, the relay is not turned on to prevent the power supply from the power supply circuit to the heating unit.</p> |
