| 摘要 |
PURPOSE:To contrive energy saving, by a method wherein a radio signal is generated when incomplete burning is detected, a fan is revolved by receiving the signal by a ventilator, through which automatic ventilation is carried out. CONSTITUTION:When a burner 5 is turned into incomplete burning due to lack of indoor oxygen, electromotive force ls of about 0.8V is generated by a sensor 7. To invert and amplify the electromotive force an output lo of a detecting circuit 7 is turned into la-(1+R23KlR22).ls and becomes lower than electric potential la. Because of the above the electric potential la becomes lower than electric potential lb, an output of a comparator 24 is turned into a low output (short-circuited with a line of an electric power source 17), and a luminous diode 9 is electrified and becomes luminous. With this construction, a phototransistor 10 is electrified and its collector potential is short-circuited with a line of an electric power source 25. The collector potential is made lower than potential lc because of the above structure, an output of a comparator 28 becomes low and a relay 29 is electrified. With this construction, a contact point 29' is electrified, a fan motor 14 is revolved for ventilation. |
