FIG. 1 is a front/right-side/top perspective view of a refrigerator showing our new design; FIG. 2 is a front-side elevational view thereof; FIG. 3 is a rear-side 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-side elevational view thereof; and, FIG. 7 is a bottom-side elevational view thereof.