| 摘要 |
PURPOSE: A boiler using solid fuel and electric heaters is provided to prevent accidents resulting from interior and exterior pressure difference when the exterior air suddenly flows into the combustion chamber. CONSTITUTION: A boiler using solid fuel and electric heaters comprises an electric heater(80), a plurality of heat transfer fins(62), and a plurality of air nozzles(74). The electric heater selectively generates heat with electricity to heat the water in a water chamber(11) formed between first and second passages. The heat transfer fins are formed in an air passage(60) to increase the air retention time and heat exchange area when the air created by a blower(61) is discharged to an air supply pipe. The air nozzles are connected to an extension pipe of the air supply pipe passing by a second air inlet(72) and discharge air to a first fuel inlet(20) through a control valve. |
