Portable air compressor enclosure

FIG. 1 is a left-side and front perspective view of a portable air compressor enclosure of the claimed design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a right-side and rear perspective view thereof.

The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. The bottom of the design is flat and unornamented.