The ornamental design of a panel of an evaporativecooler, as shown and described.
FIG. 1 is a top, front, and right side perspective view of a panel of an evaporative cooler showing my new design;
FIG. 2 is an additional top, front, and right side perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a right side elevation view thereof, the left side being a mirror image of that shown;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The broken-line disclosure of the remainder of the evaporative cooler in FIG. 1 and the broken-line fragments of the remainder of the evaporative cooler in FIGS. 2–6 are shown for illustrative purposes only and form no part of the claimed design.