We claim the ornamental design for a cold air discharge duct for kimchi refrigerators, as shown and described.
FIG. 1 is a perspective view of a cold air discharge duct for kimchi refrigerators showing our new design:
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left-side elevation view thereof;
FIG. 5 is a right-side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a reduced perspective view thereof, the broken line showing of the kimchi refrigerator is for illustrative purposes only and forms no part of the claimed design.