| 摘要 |
PROBLEM TO BE SOLVED: To provide a small and high performance heat recovery apparatus recovering heat of an internal combustion engine. SOLUTION: A plurality of flat tubes (32) formed as tubes having notches (34, 35) by linearly cutting upper and lower parts from a hollow flat circular doughnut shape are stacked to structure a tube laminate (30). The tube laminate (30) is attached to a case (22) so that a notch (44) aligns with the notch (34) and faces upward by an exhaust inflow end plate (42) and that a notch (55) aligns with the notch (35) and faces downward by an exhaust outflow end plate (52). A cutoff valve (68) is provided at an exhaust outflow end of an exhaust communication tube (60) passing through the center of the tube laminate (30) by heat insulation. While an internal combustion engine is warming up, the cutoff valve (68) is closed to cause the exhaust to flow in gaps of the respective flat tubes (32) from upward to downward as a whole and also a heat exchange medium is caused to flow in the respective flat tubes (32) from downward to upward as a whole to have heat exchanged between the exhaust and the heat exchange medium to recover the exhaust heat. COPYRIGHT: (C)2009,JPO&INPIT
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