The ornamental design for a heatexchangerfin, as shown and described.
FIG. 1 is a front, perspective view of a heat exchanger fin embodying the principles of my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a side view thereof as seen from the right-hand side of FIG. 2;
FIG. 5 is a side view thereof as seen from the left-hand side of FIG. 2;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a cross-sectional view taken along line 8--8 of FIG. 1.
The broken lines illustrate portions of the heat exchanger fin and form no part of the claimed design. The heat exchanger fin is shown with a symbolic break in its length and its width. The appearance of any portion of the article between the break lines forms no part of the claimed design.