| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger capable of eliminating disadvantage that a heat recovery amount by heat transfer pipes near an exhaust port is reduced even if a total number of heat transfer pipes stored in a case is many.SOLUTION: A heat exchanger HE1 has the first and second air supply ports 21A, 21B acting as air supply ports for heater gas arranged at a case 2 storing a plurality of heat transfer pipes 4. The first air supply port 21A is arranged at the opposite position to an exhaust port 22 while holding the plurality of heat transfer pipes 4, the heater gas supplied from the first air supply port 21A into the case 2 can reach to the exhaust port 22 after passing through a substantial entire arrangement region of a plurality of heat transfer pipes 4. The second air supply port 21B is arranged near the exhaust port 22 rather than the first air supply port 21A, the heater gas supplied from the second air supply port 21B into the case 2 can reach the exhaust port 22 after passing a certain arrangement region of a plurality of heat transfer pipes 4.SELECTED DRAWING: Figure 1 |
