| 摘要 |
PURPOSE:To reduce a rate of occurrence of interruption during an operation as much as possible and improve an efficiency of drying operation by a method wherein a flame sensing means is arranged and a drying operation is continued even if a light of the burner is diminished in the midway of the operation and then a reignition is automatically performed. CONSTITUTION:When a flame of a burner B is diminished in the midway of the operation, the diminished condition of the flame is sensed by a flame sensor FS and a flame sensing signal is changed over from its ''ON'' condition to its ''OFF'' condition showing ''NO FLAME'', data of ignition stroke stored in advance in a memory part 28b by a control and calculator part 28a of CPU (central processing unit) 28, a reignition signal is outputted from a second output port and then an ignition heater 23 is energized. As a result, for example, in case that a cause of diminishing flame is due to a mixing of bubbles in the fuel or due to an instantaneous shut-down of electricity of a duration of 0.5sec or so, the system is recovered already to such a condition as a rapid ignition can be performed without performing any repair at all, so that the burner B is ignited again with an ignition heater 23 and a drying operation is continued. |
