The ornamental design for an airconditioner, as shown and described.
FIG. 1 is a front, bottom and right side perspective view of an air conditioner, showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a reference enlarged vertical cross-sectional view thereof; taken along line 8-8 of FIG. 2, with broken line disclosure of internal elements understood to represent unclaimed portions of the article in which the claimed design is embodied;
FIG. 9 is a reference enlarged vertical cross-sectional view thereof; taken along line 9-9 of FIG. 2, with broken line disclosure of internal elements understood to represent unclaimed portions of the article in which the claimed design is embodied;
FIG. 10 is a reference enlarged partial cross-sectional view thereof; taken along line 10-10 of FIG. 4 restricted line 10-10 of FIG. 2 sectional area, with broken line disclosure of internal elements understood to represent unclaimed portions of the article in which the claimed design is embodied; and,
FIG. 11 is a reference front, bottom and right side perspective view with the cover opened.