| 摘要 |
PURPOSE:To provide a vaporization type burning device which can perform idle burning (burning without fuel) automatically at a high temp. when tar is accumulated, by stopping normal burning to perform idle turning when the ionic current value is smaller than the threshold value at which abnormal burning is caused by the accumulation of air in a vaporizing chamber. CONSTITUTION:An ionic current detecting means, which measures the ionic current value (if) at a time after a specified time has elapsed required to stabilize the flame ionic current after flame formation, is installed and a value measured by the ionic current detecting means is compared with a previously set threshold value (io) of the ionic current in abnormal burning and then it is checked whether abnormal burning has been carried out or not and if abnormal condition is determined to exist by this decision means, the device operates an idle burning means. |
