FIG. 1 is a perspective view of a mobile air conditioner showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof, wherein the broken lines are shown for illustrative purposes only and form no part of the claimed design; and,
FIG. 8 is a rear perspective view thereof.