Patent ID: 7231966

Claim:
An evaporator for an air conditioning apparatus comprising: a core portion having multiple vertically extending tubes, which are arranged in a line at generally equal intervals in a laminating direction; an upper tank and a lower tank respectively provided at an upper end and a lower end of the multiple tubes, so that fluid passages formed in the tubes are communicated with inside spaces of the tanks, wherein the tanks are formed as separate parts from the tubes, and a width of the tanks is larger than that of the tubes in a direction perpendicular to a plane formed by the core portion; a fluid passage portion formed in the lower tank and extending in the laminating direction, wherein a width of the fluid passage portion is smaller than that of the tubes in the direction perpendicular to the plane formed by the core portion, the lower tank defining a flange extending from the fluid passage portion in a direction generally perpendicular to the plane formed by the core portion; multiple fluid flow spaces formed in the lower tank and opposing to the respective ends of the tubes for communicating the fluid passages of the tubes with the fluid passage portion; and multiple drainage means formed in the flange defined by the lower tank such that the drainage means do not interfere with the fluid passage portion and the fluid flow spaces.