| 摘要 |
PURPOSE:To perform control of air conditioning highly reliably with relatively simple equipment by controlling the open and close time of hot water valve in accordance with the output of the computing element processing the signals from temperature detecting device and temperature setting device. CONSTITUTION:Under heating operation, by temperature detection element 1, when room temperature is higher than set temperature by setting equipment Vg, voltage Va at point a becomes lower than the standard voltage Vb at point b, and the voltage Vc at point c of the switching circuit E becomes higher than Vb. Therefore ON-time of the transistor Trb becomes shorter than that when Vc=Vb, and the open time of the hot water valve 108 by solenoid 7 becomes shorter and the flow of hot water to flow-in heat exchanger of the heater decreases and the room temperature becomes lower. When the room temperature decrease, Va increases and Vc decreases to make ON-time of Trb elongated. On the other hand, when the room temperature is lower than the set temperature, reversal of the above processes will take place. |
