Abstract: The disclosure herein describes an evaporation tray made in a single piece of molded plastic that includes a series of posts for mounting the compressor above the bottom wall of the tray so that water collected therebeneath may be evaporated by the heat dissipated by the compressor; well means integrally mounted to the bottom wall of the tray serve to collect water formed from melted frost through a drain tube which has its lower extremity securely received in the well means; the drain tube and the well means are arranged to retain water which thus prevents an air return flow through the drain tube inside the refrigerator.