| 摘要 |
PURPOSE:To reduce a facility expenditure of a surplus discharged gas discharging passage and improve a heat recoverying efficiency by a method wherein a heat exchanging means utilizing a combustion discharging gas is installed within a heat accumulating chamber or a combustion discharged gas discharging passage near the heat accumulating chamber. CONSTITUTION:Combustion discharged gas utilized for pre-heating combustion air and combustion discharged gas corresponding to a heating calorie at heat exchanging means 6a, 6b to the fluid flowing in the heat exchanging means 6a, 6b are discharged from their discharging passages 5a, 5b. Due to this fact, it is possible to increase an amount of combustion discharged gas discharged from the discharging passages 5a, 5b and occasionally all the combustion discharged gas can be discharged from the discharging passages 5a, 5b. With such an arrangement as above, it is possible to reduce a temperature of combustion discharged gas passing through heat accumulating devices 2a, 2b, facility expenditure for the discharging passages 5a, 5b for surplus discharged gas and then improve a heat recoverying efficiency. |
