FIG. 1 is a perspective view of an air purifier showing the new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left-side elevation view thereof;
FIG. 5 is a right-side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a perspective view thereof showing the circulator part at an angle;
FIG. 9 is a front elevation view thereof;
FIG. 10 is a rear elevation view thereof;
FIG. 11 is a left-side elevation view thereof;
FIG. 12 is a right-side elevation view thereof;
FIG. 13 is a top plan view thereof;
FIG. 14 is a bottom plan view thereof;
FIG. 15 is a perspective view thereof showing the circulator part at another angle;
FIG. 16 is a front elevation view thereof;
FIG. 17 is a rear elevation view thereof;
FIG. 18 is a left-side elevation view thereof;
FIG. 19 is a right-side elevation view thereof;
FIG. 20 is a top plan view thereof;
FIG. 21 is a bottom plan view thereof; and,
FIG. 22 is a partial perspective view thereof showing the air purifier in a state of use.
The evenly spaced broken line features depict portions of the air purifier that form no part of the claimed design. The dot dash dot broken line in FIG. 22 denotes the boundary of the partial view and forms no part of the claimed design.