| 摘要 |
<p>PURPOSE:To improve the combustion capability, reduce the harmful combustion exhaust emission generating quantity compact and the can body structure by building a recirculating mechanism for combustion gas in a can body. CONSTITUTION:A plurality of heat-transfer tubes 20, 20... are arranged between a pair of heat-transfer tube walls 10, 10 which are in parallel to each other. At the same time, a combustion burner 40 is arranged at one side opening of the heat-transfer tube walls 10, 10. It is constituted in such a manner that a combustion gas is circulated in parallel between the heat-transfer tube walls 10, 10 by forming a combustion exhaust gas outlet C at the other side opening, and at the upstream side of the combustion gas stream between the heat-transfer tube walls 10, 10, a partition wall 30 which divides the stream of the combustion gas into a main stream path A and circulating stream path B is provided.</p> |
