| 摘要 |
PROBLEM TO BE SOLVED: To provide a small heat exchange body for a heating device having excellent heat exchange efficiency with a simple structure.SOLUTION: An air supply flow passage A0 has first-third air supply flow passages A1-A3, and an exhaust flow passage has first-third exhaust flow passages L1-L3. The air supply flow passage and the exhaust flow passage are adjacently arranged in a heat exchangeable manner with a heat transfer pipe member held therebetween so as to form a multiple pipe structure in which the third air supply flow passage A3, the first exhaust flow passage L1, the second exhaust flow passage L2, the second air supply flow passage A2, the third exhaust flow passage L3 and the first air supply flow passage A1 are laminated in this order.SELECTED DRAWING: Figure 1 |
