Wärmetauscher und Verfahren zu seiner Herstellung

摘要

A laminated-type evaporator (200) for an automotive air conditioning refrigerant circuit includes a plurality of tube units (201) having a pair of tray-shaped plates (202). Each of the tray-shaped plates includes a depression (120) defined therein, a flange (13) extending about the periphery thereof, and a wall (14) disposed at an intermediate location therein and extending a portion of the length of each plate to thereby define a rear side and a front side to each plate. The wall includes a flat portion formed at an upper end thereof. A slit (141) is formed at the flat, upper end portion of the wall by shearing. The slit extends along substantially the entire length of the wall along the wall's longitudinal axis.