摘要 |
A core structure of a heat exchanger includes seat plates (3, 4) arranged opposite to each other with a predetermined space interposed between them and formed with tube holes (12), reinforcements (7, 8) connecting the seat plates (3, 4) at their end portions, tubes (5, 5a; 5a) fixed at its both end portions (5c) by insertion into the tube holes (12), corrugated fins (6) arranged between the tubes (5, 5a; 5a), and an upper and lower tanks attached to the seat plates (3, 4). The tanks are connected by the tubes (5, 5a; 5a) so that coolant flows between the tanks through the tubes (5, 5a; 5a). Tubes (5a; 5a) arranged at outermost positions of the seat plates (3, 4) among the tubes (5, 5a; 5a) are inserted at its end portions (5c) by insert members (9) so that the insert members (9) can increase rigidity of the end positions (5c) of the outermost positioned tubes (5a; 5a) and ensure flowing of the coolant between the tanks through the outermost positioned tubes (5a; 5a). <IMAGE>
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