| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a small hot water generator having high heat efficiency with a simple structure. <P>SOLUTION: This hot water generator has a can body, a burner arranged in the can body, a heat transfer tube arranged in an outer peripheral part of the burner and spirally wound along a can wall of the can body, and a reflection member oppositely arranged to the burner in a return pipe part of the heat transfer tube. The heat transfer tube is composed of an inside heat transfer tube near to the center of the can body and an outside heat transfer tube arranged in its outer peripheral part. An exhaust gas passage of combustion gas generated by the burner is formed so as to reach a flue port of its can body, by passing through a passage formed of the outside heat transfer tube and the can wall, by passing through the outside heat transfer tube from the inside heat transfer tube. <P>COPYRIGHT: (C)2008,JPO&INPIT |
