| 摘要 |
Disclosed is a heat exchanger core comprising a multiplicity of flat plate parts (3) formed by alternately folding back a single belt-like metal plate in zigzag at a first fold-back edge (1) and at a second fold-back edge (2); a plurality of element parts formed by joining peripheral edges (4) of a pair of adjoining flat plate parts (3) which are integrally coupled to each other at the first fold-back edge (1), adjoining element parts (5) being integrally coupled at a certain interval to each other at the second fold-back edge (2); and a pair of ports (6) and (7) for a first fluid formed at positions apart from each other at the peripheral edge of each element part (5), wherein a second fluid flows along the outer surface side of each element part (5).
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