| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact-sized hot water feeder showing a high efficiency and durability. SOLUTION: A high temperature side heat exchanger 8 is arranged within a combustion heat flame of a burner 10. At a downstream side of combustion discharged gas heat exchanged by the high temperature side heat exchanger 8, there are provided a low temperature side heat exchanger 7 for performing a heat exchanging of combustion heat and a drain pan 4 for receiving drain generated from the low temperature side heat exchanger 7 and discharging it to a desired location. Then, the high temperature side heat exchanger 8, the low temperature side heat exchanger 7, a burner 10 and the drain pan 4 are integrally molded by SiC. Further, the high temperature side heat exchanger 8 is arranged within the combustion flame of the burner 10, fuel gas is ignited at clearances of each of heat transfer fins 21 and then a height of a combustion chamber 9 is lowered. |
