| 摘要 |
PURPOSE:To contrive to alarm an operator for calling attention before an abnormal burning condition due to the oxygen deficiency and the like by a method wherein a control part is provided for judging of pulsation and generating of alarm, the control part judges that the pulsation of a flame detecting element exceeds the designated range after the starting of the signal pulsation. CONSTITUTION:A flame detecting element 9 made of tin oxide and the like is connected to a resistor 11 in series. The resistor 12 is connected to the resistor 11 in parallel or made nonactive by the action of an open/close element 13. The potential electric voltage between the resistor and element is setnt to a control part 15 as the designated value in an analog-digital convertor 14. The judgement is made in the control part and an alarm is generated by a display 17. When the resistor 12 is made non-active, the disconnection of the element is detected by the potential electric voltage between the resistor 11 and the element 9. When the resistor 12 is connected to the resistor 11 in parallel, the signal is detected, that is, the incomplete burning condition is detected after the designated burning condition. |
