The ornamental design for an airconditioner, as shown and described.
1. Air conditioner
1.1 is a front perspective view of the air conditioner.
1.2 is a front view thereof.
1.3 is a back view thereof.
1.4 is a left view thereof.
1.5 is a right view thereof.
1.6 is a top view thereof.
1.7 is a bottom view thereof.
1.8 is a reference view showing an example of the use state in which the air outlets are moved downward.
1.9 is a reference view showing an example of the use state in which the air outlets are moved backward.
1.10 is a reference view showing an example of the use state in which various information, such as temperatures of the air blow etc. is projected on the wall from the projector at the bottom part of the claimed design.
The broken lines depict portions of the air conditioner that form no part of the claimed design; the fine lines on the drawings indicate curved surface.