To enable an inspection and a cleaning of a drain pan to be easily carried out by a method wherein the drain pan is fixed to a lower part of a main body casing of a unit cooler through more than two adjusting screws so as to enable the drain pan to be moved up and down.

A unit cooler 2 is hung and supported at a predetermined position in a main body 1 of a refrigerator through a hanger fitting 3. This unit cooler 2 is constructed such that a drain pan 7 is hung and supported at a lower part of a casing 5 having a cover 6 fixed thereto through an adjusting bolt 18. Then, this adjusting part 18 is composed of a male adjusting screw 21 and a female adjusting screw 22. A part of a cooler 4 is held and fixed with both screws 21 and 22. The adjusting screw 21 and the adjusting screw 22 are connected by a set screw so as to enable the drain pan to be moved up and down. With such an arrangement as above, it is possible to perform an easy inspection and cleaning of the drain pan 7.