| 摘要 |
<p>PURPOSE:To prevent condensed water from dropping on a burner even if the burner is highly efficient, by providing the burner performing burning downward. CONSTITUTION:Fuel is spouted from nozzles 2, 2, a necessary quantity of combustion air 1 is sent to a central air supply part 9 through a combustion fan 7 and burnt by respective burners 2, 2'. The central air supply part 9 is partitioned correspondingly to the respective burners 2, 2' by a damper 10, and necessary air quantities for the respective burners 2, 2' are set up. A difference between a predetermined temperature and a detected temperature detected by a thermistor is obtained by a detecting part. The combustion fan 7 is controlled by a total of the deviations, through which the whole air quantity is set up, and an opening of the damper 10 is set up by controlling a DC motor 11 by a difference of the deviations. With this construction, the combustion fan 7 does not generate corrosions through touching of condensed water to the combustion fan 7, a variation of an excess rate of air is few and efficiency is not deteriorated even if a combustion quantity is deteriorated.</p> |
