The ornamental design for an architectairpurificationunit, as shown and described.
FIG. 1 is perspective view of the architect air purification unit;
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; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of an architect air purification unit is included for the purpose of illustrating portions of the article and forms no part of the claimed design.