FIG. 1 is a front, top, left-hand side perspective view of a refrigerator unit comprising a first embodiment of a new, original and ornamental design;
FIG. 2 is a rear view of a refrigerator unit comprising the first embodiment of the new, original and ornamental design;
FIG. 3 is a front view of a refrigerator unit comprising the first embodiment of the new, original and ornamental design;
FIG. 4 is a left-hand side view of a refrigerator unit comprising the first embodiment of the new, original and ornamental design;
FIG. 5 is a right-hand side view of a refrigerator unit comprising the first embodiment of the new, original and ornamental design;
FIG. 6 is a top view of a refrigerator unit comprising the first embodiment of the new, original and ornamental design;
FIG. 7 is a bottom view of a refrigerator unit comprising the first embodiment of the new, original and ornamental design;
FIG. 8 is a front, top, left-hand side perspective view of a refrigerator unit comprising a second embodiment of a new, original and ornamental design;
FIG. 9 is a rear view of a refrigerator unit comprising the second embodiment of the new, original and ornamental design;
FIG. 10 is a front view of a refrigerator unit comprising the second embodiment of the new, original and ornamental design;
FIG. 11 is a left-hand side view of a refrigerator unit comprising the second embodiment of the new, original and ornamental design;
FIG. 12 is a right-hand side view of a refrigerator unit comprising the second embodiment of the new, original and ornamental design;
FIG. 13 is a top view of a refrigerator unit comprising the second embodiment of the new, original and ornamental design; and,
FIG. 14 is a bottom view of a refrigerator unit comprising the second embodiment of the new, original and ornamental design.