| 摘要 |
In a heat exchanger with lamella fins (1), which are held at a distance from and parallel to one another by shaped collars (8) of the lamella fins (1) and are penetrated in passages (2') of the collars (8) by tubes (9) extending parallel with respect to one another, the internal diameter of the passage (2') being matched in each case to the external diameter of the tube (9) and bearing at least partially against the outer circumference of the tube (9), it is proposed in order to be able to use materials of higher strength without the risk of cracking during deformation while simultaneously exactly maintaining the spacings (5) between the lamella fins (1) that tongues (3) are arranged distributed on the circumference on the penetrated rim of the passage (2'), the free ends of the tongues (9) are bent at an angle to the tube (9) penetrating the passage (2'), and that these bent tongues (9) provide distance bearing surfaces (6) for the adjoining lamella fins (1).
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