FIG. 1 is a front perspective view of a first embodiment of an air conditioning refrigerant charging device with digital gauge in accordance with the claimed design;
FIG. 2 is a left side elevation view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a rear elevation thereof; and
FIG. 7 is a front elevation view thereof.
FIG. 8 is a front perspective view of a second embodiment of an air conditioning refrigerant charging device with digital gauge in accordance with the claimed design;
FIG. 9 is a left side elevation view thereof;
FIG. 10 is a right side elevation view thereof;
FIG. 11 is a top view thereof;
FIG. 12 is a bottom view thereof;
FIG. 13 is a rear elevation thereof; and
FIG. 14 is a front elevation view thereof.
FIG. 15 is a front perspective view of a third embodiment of an air conditioning refrigerant charging device with digital gauge in accordance with the claimed design;
FIG. 16 is a left side elevation view thereof;
FIG. 17 is a right side elevation view thereof;
FIG. 18 is a top view thereof;
FIG. 19 is a bottom view thereof;
FIG. 20 is a rear elevation thereof; and,
FIG. 21 is a front elevation view thereof.
The broken lines in the FIGURES represent unclaimed subject matter and form no part of the claimed design.