| 摘要 |
A gravity-fed oil-fired furnace for non-industrial heating systems has the combustion process optimised by applying a forced draught to the combustion chamber by means of a motor-driven extractor (6) exhausting the combustion gases through a relatively-narrow flue (10). the speed of the extractor impeller is monitored to derive an output signal which is used as a feedback signal to control the speed of the motor driving the impeller. <IMAGE> |
