| 摘要 |
A heat exchanger is assembled in a simple and cost-effective way and needs a relatively low space requirement. According to the invention, the tubes ( 11 ) are expanded at the tube ends ( 16 ) in such a way that the tube ends ( 16 ) are of rectangular design in cross section. The tube ends ( 16 ) have parallel long connecting surfaces ( 18 ) which are brought into bearing contact with long connecting surfaces ( 18 ) of adjacent tube ends ( 16 ). Furthermore, the tube ends ( 16 ) have short connecting surfaces ( 22 ), onto which the collecting tanks ( 23, 29 ) are placed with their legs ( 24, 25 ) or collars ( 30, 31 ). A space-saving heat exchanger can be produced in a simple way by soldering the long connecting surfaces ( 18 ) together, on the one hand, and by soldering the short connecting surfaces ( 22 ) to the collecting tanks ( 23, 29 ), on the other hand.
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