| 摘要 |
PURPOSE:To enable an automatic aeration to be carried out in case of a lack of oxygen by a method wherein a damper device for receiving an output signal of a sensor for use in detecting a lack-of-oxygen within a room and changing- over air supplied to a burner part into indoor air and an opening or closing device to open an outdoor air discharging port are arranged. CONSTITUTION:When a sensor 19 detects a lack of oxygen within a room, a control unit 21 may operate a damper device 12 and an opening or closing device 16, change-over air to be supplied to a burner 5 from a surrounding atmosphere into the room, open a surrounding atmosphere discharging port 15 to supply surrounding atmosphere into the room, so that the polluted indoor air can be discharged through a supplying or discharging passage at the burner part 5 can be discharged out of the room and at the same time oxygen can be supplied to the room. Therefore, another aeration device is not required, a ventilation can be carried out and a dangerous state caused by a lack of oxygen can be prevented. Since the ventilation can be automatically carried out by both sensor and controlling unit, a troublesome operation may not be required. |
