| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water supply device for improving heat efficiency of a secondary heat exchanger by bringing a combustion gas into contact with nearly the whole of the secondary heat exchanger received inside. <P>SOLUTION: This hot water supply device 1 includes a combustion section 2 for combusting a fuel, a combustion case 3 in which the combustion gas generated by the combustion at the combustion section 2 flows downward, an exhaust collecting section 5 in which the combustion gas passing through the combustion case 3 flows, an exhausting section 6 disposed at an upper part of the exhaust collecting section 5 for discharging the combustion gas passing through the exhaust collecting section 5 upward, a primary heat exchanger 20 for heating hot water/water by heat exchange with the combustion gas flowing in the combustion case 3, and the secondary heat exchanger 30 disposed on a position from a lower region of the combustion case 3 over a lower region of the exhausting section 6 and for heating the hot water/water by heat exchange with the combustion gas flowing in the exhaust collecting section 5, and an outer edge of the secondary heat exchanger 30 is gradually reduced toward the lower part. <P>COPYRIGHT: (C)2010,JPO&INPIT |
