| 摘要 |
PURPOSE:To effect combustion control accurately for every abnormal causes and improved safety and durability by a method wherein the amount of oil transfer is increased up to the predetermined amount in case the detecting value of flame current is reduced and the cause of the reduction is understood from the observation result of the flame current value thereafter. CONSTITUTION:In case the flame current value arrives at a lower value than a flashing flame current value, the control circuit 26 sends an increasing indication of the amount of oil transfer to the amount of oil transfer control circuit 23 due to the judgement of generation for the abnormal combustion, the amount of oil transfer for an evaporator is increased by an electromagnetic pump 12. The control circuit 26 detects the flame current value at the period of time passed the predetermined time from the period of time exceeding the said current value again after the flame current value once became to the flashing flame current value or under. When it is the judgement flame current value or above, the cause thereof is understood as a clogging of tar and the amount of oil transfer control circuit 23 is indicated for the predetermined amount of oil transfer set so as to overcome against the tar clogging. In case the flame current value becomes the judgement flame current value or under and drops in accordance with a time, the cause thereof is understood as the drop of the oxygen temperature while an alarm indication for the ventilation of the room may be displayed to an indicator 28 by the control circuit 26. |
