| 摘要 |
PURPOSE:To improve safety in a combustion type heating device having electric control by prohibiting the restarting of the operation of a combustor even when the rotation of a combustion air blast motor is temporarily stopped. CONSTITUTION:The operating condition of a combustion air blast motor 13 is inputted into a microcomputer 17 as the output of a housing pulse generator 14 while being monitored one by one to enable a fuel pump 11 to be driven only when the output of the pulse generator 14 is normal. Even if a driving output is given to the blast motor 13, when pulses less than a reference period are not detected in an input 47, the fuel pump 11 is stopped while stopping an operation. By this structure, abnormal combustion, etc., can be prevented, improving safety. |
