| 摘要 |
PURPOSE:To prevent the shortage of oxygen and the clogging of a burner due to dust by a constitution wherein the burner is controlled based on the signals of a temperature sensor provided near an inner flame tube or an outer flame tube and another temperature sensor provided in an air passageway at the side of the inner flame tube, in the multi-layer tube type household burner. CONSTITUTION:During the combustion, a first temperature sensor 15 generates a predetermined electromotive force and the second temperature sensor 18 receives heat by the heat sensitive unit 19 thereof whereby an abnormality detection circuit is kept in a stationary condition. When the shortage of oxygen is caused, small flames, which are being formed on the small holes 2 of an inner flame tube 3 and an outer flame tube 4, move upward simultaneously with the shortage of oxygen while the flames at the lower part of the flame tubes are eliminated. Accordingly, the temperature of lower parts of the inner and outer flame tubes 3, 4 is reduced and the electromotive force of the sensor 15 is reduced whereby an information circuit, not shown in a diagram, is operated and the flames are eliminated. When a burner is clogged by dust, the temperature of the inner flame tube 3 is increased, therefore, the sensor 18 detects it and operates the information circuit in the same manner. According to this constitution, reliability for the detection of the shortage of oxygen and the clogging of the burner due to dust may be improved. |
