Heat exchanger fin having canted lances

F - Mech Eng,Light,Heat,Weapons – 28 – F

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F28F 1/12 (2006.01) F28D 1/047 (2006.01) F28F 1/32 (2006.01) F28F 13/06 (2006.01)

Patent

CA 2495814

A heat exchanger coil assembly is provided. The fins of the assembly include lance style enhancements on a corrugated shape of the fin. Lances are provided on both the upstream and the downstream sides of each corrugation. The upstream lance forms a first angle with respect to a direction of mean airflow and the downstream lance forms a second angle with respect to the direction of mean airflow. The first and second angles are not equal, such that the lances are canted with respect to one another. This generates two different streams of air flow such that a wake of the upstream lance will not impinge on the downstream lance, thereby maximizing heat transfer for both the upstream and the downstream lances.

L'invention concerne un ensemble serpentin d'échangeur thermique. Les ailettes de cet ensemble comprennent des éléments activateurs de type crevées formées sur les ondulations de l'ailette. Les crevées sont formées sur le côté amont et le côté aval de chaque ondulation. La crevée amont forme un premier angle avec la direction moyenne d'écoulement d'air et la crevée aval forme un second angle avec la direction moyenne d'écoulement d'air. Le premier et le second angle ne sont pas égaux, de sorte que les crevées présentent une inclinaison relative l'une par rapport à l'autre. Cette configuration génère deux flux d'air différents, ce qui permet d'éviter que le sillage produit par la crevée amont n'arrive sur la crevée aval, et augmente ainsi le transfert de chaleur à la fois dans la crevée amont et dans la crevée aval.

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