Heat exchanger, in particular a charge intercooler or coolant cooler for motor vehicles
A technology of heat exchangers, stiffeners, applied in the field of charge air cooler or coolant radiator
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[0021] FIG. 1 shows a heat exchanger 1 according to the invention with a tube plate 2 , a plastic box 3 and flat tubes 4 which are fastened in openings 2 a of the tube plate 2 . As is known from the prior art, the tube base 2 has on the outside a circumferential groove 2b, to which an outer edge region 2c adjoins. The plastic box 3 has a U-shaped profile, not fully shown, which comprises a wall 3a which transitions into a thicker-walled flange 3b. Flange 3b with a seal (not shown) is inserted into groove 2b of tube base 2 and clamped to tube base 2 via deformable edge region 2c in a crimping or clamping connection (not shown in detail). Such a tank / tube-sheet connection is known from the aforementioned prior art, for example DE-A 38 41 470 . The flat tube 4 is brazed with corrugated fins not shown in the figure and the opening on the tube plate (only part of the tube plate 2 can be seen in the tube plate) to form a core body. The plastic box (in which again only a section of...
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