FIG. 1 is a top perspective view of an air purifier showing my new design according to a first embodiment;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is an enlarged view of portion 9 of FIG. 1;
FIG. 10 is an enlarged view of portion 10 of FIG. 1;
FIG. 11 is a top perspective view of an air purifier showing my new design according to a second embodiment;
FIG. 12 is a bottom perspective view of FIG. 11;
FIG. 13 is a front elevational view of FIG. 11;
FIG. 14 is a rear elevational view of FIG. 11;
FIG. 15 is a left side elevational view of FIG. 11;
FIG. 16 is a right side elevational view of FIG. 11;
FIG. 17 is a top plan view of FIG. 11;
FIG. 18 is a bottom plan view of FIG. 11;
FIG. 19 is an enlarged view of portion 19 of FIG. 11;
FIG. 20 is an enlarged view of portion 20 of FIG. 11;
FIG. 21 is a top perspective view of an air purifier showing my new design according to a third embodiment;
FIG. 22 is a bottom perspective view of FIG. 21;
FIG. 23 is a front elevational view of FIG. 21;
FIG. 24 is a rear elevational view of FIG. 21;
FIG. 25 is a left side elevational view of FIG. 21;
FIG. 26 is a right side elevational view of FIG. 21;
FIG. 27 is a top plan view of FIG. 21;
FIG. 28 is a bottom plan view of FIG. 21;
FIG. 29 is an enlarged view of portion 29 of FIG. 21;
FIG. 30 is an enlarged view of portion 30 of FIG. 21;
FIG. 31 is a top perspective view of an air purifier showing my new design according to a fourth embodiment;
FIG. 32 is a bottom perspective view of FIG. 31;
FIG. 33 is a front elevational view of FIG. 31;
FIG. 34 is a rear elevational view of FIG. 31;
FIG. 35 is a left side elevational view of FIG. 31;
FIG. 36 is a right side elevational view of FIG. 31;
FIG. 37 is a top plan view of FIG. 31;
FIG. 38 is a bottom plan view of FIG. 31;
FIG. 39 is an enlarged view of portion 39 of FIG. 31;
FIG. 40 is an enlarged view of portion 40 of FIG. 31;
FIG. 41 is a top perspective view of an air purifier showing my new design according to a fifth embodiment;
FIG. 42 is a bottom perspective view of FIG. 41;
FIG. 43 is a front elevational view of FIG. 41;
FIG. 44 is a rear elevational view of FIG. 41;
FIG. 45 is a left side elevational view of FIG. 41;
FIG. 46 is a right side elevational view of FIG. 41;
FIG. 47 is a top plan view of FIG. 41;
FIG. 48 is a bottom plan view of FIG. 41;
FIG. 49 is an enlarged view of portion 49 of FIG. 41;
FIG. 50 is an enlarged view of portion 50 of FIG. 41;
FIG. 51 is a top perspective view of an air purifier showing my new design according to a sixth embodiment;
FIG. 52 is a bottom perspective view of FIG. 51;
FIG. 53 is a front elevational view of FIG. 51;
FIG. 54 is a rear elevational view of FIG. 51;
FIG. 55 is a left side elevational view of FIG. 51;
FIG. 56 is a right side elevational view of FIG. 51;
FIG. 57 is a top plan view of FIG. 51;
FIG. 58 is a bottom plan view of FIG. 51;
FIG. 59 is an enlarged view of portion 59 of FIG. 51; and,
FIG. 60 is an enlarged view of portion 60 of FIG. 51.
The broken lines in the drawings illustrate the portions of the air purifier which form no part of the claimed design.