Flame monitoring method for fuel operated burner, involves detecting electrical resistance of burner or measuring unit on side of burner surface for monitoring flame and controlling fuel air ratio of burner

摘要

The method involves detecting electrical resistance of a fuel-operated burner (12) or a measuring unit on a side of the burner surface (9) for monitoring the flame and controlling fuel air ratio of the burner. The burner or the unit is associated to a constant current source, and thermal output of the burner is determined to change a resistance reference value of the fuel-air-ratio. The ratio is decreased when the measured resistance is larger than the reference value, and is increased when the measured resistance is less than the reference value.