COOLING UNIT AND DRAIN CASE FOR AIR CONDITIONERS

摘要

A drain case is disposed between the bottom wall of a unit case and the lower end of refrigerant passage pipes of a stacked type refrigerant evaporator. The drain case is W-shape in cross section, and comprising two pieces of outside inclined walls contacting the side ends of two pieces of tank parts formed at the lower end side of the refrigerant passage pipes, a chevron type protruded wall contacting a recessed part formed at the bottom end of the part between the adjacent two pieces of tank parts and inside inclined walls having a drain hole. In this arrangement, the condensed water flows from the side ends of the two pieces of tank parts and the part between the two pieces of tank part into the lower ends thereof reaches the two pieces of outside inclined walls and protruded wall of the drain case before reaching the bottom end of the two pieces of tank parts, and then is efficiently drained therefrom. Localized corrosion that may occur at the lower end part of refrigerant passage pipes is prevented by not allowing the condensed water to stay at the lower end side of the refrigerant passage pipes.