The ornamental design for an airdiffuserguard, as shown and described.
FIG. 1 is a front perspective view of the air diffuser guard showing my new
design;
FIG. 2 is an enlarged end elevational view of FIG. 1, the opposite end
being a mirror image thereof;
FIG. 3 is an enlarged side elevational view of FIG. 1, with the center
portion broken away for ease of illustration, with the rear elevational
view being a mirror image;
FIG. 4 is an enlarged top plan view thereof, with the center portion broken
away for ease of illustration; and,
FIG. 5 is an enlarged bottom plan view thereof, with the center portion
broken away for ease of illustration.