| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a combustion device having a highly efficient secondary heat exchanger 9 capable of suppressing reduction in exhaust gas temperature by heat radiation within an exhaust chamber 8 while responding to dimensional restriction of a wall-through kiln body 1, and the exhaust chamber 8 capable of reducing exhaust pressure loss even if the secondary heat exchanger 9 is set within the exhaust chamber 8 due to the dimensional restriction of the wall-through kiln body 1, or a convenient water heating device which causes no abnormality of hot water supply temperature by eliminating heating to the secondary heat exchanger 9 by exhaust gas even in its single additional boiling operation. <P>SOLUTION: The combustion device comprises an additional heating heat exchanger 7, a hot water supply heat exchanger 5, and a fan 2 blowing air simultaneously to the additional heating heat exchanger and the hot water supply heat exchanger, in which exhaust gas passed through the additional heating heat exchanger and exhaust gas passed through the hot water supply heat exchanger are exhausted in independent passages, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT |
