METHOD FOR BRAZE-WELDING A FIXING PLATE AND A FLOW CHANNEL CAP IN A HEAT EXCHANGER, AND HEAT EXCHANGER PRODUCED BY SAME

摘要

The present invention relates to a method for braze-welding a fixing plate and a flow channel cap in a heat exchanger, and to a heat exchanger produced by same. The method comprises the step of: providing a fixing plate (10) having a plurality of resilient protrusions (11) for snap-fitting; providing a flow channel cap (20), one end (22) of which is L-shaped to be snap-fitted onto the resilient protrusion (11) and the other end of which has a stepped portion (21); inserting the stepped portion (21) of the flow channel cap (20) into the resilient protrusion (11) such that an end (21b) of the stepped portion (21) contacts an end of the resilient protrusion (11); pressing the L-shaped end (22) of the flow channel cap (20) against the resilient protrusion (11) of the fixing plate (10) such that the L-shaped end (22) is snap-fitted onto the resilient protrusion (11) and thus tightly contacts the fixing plate (10), and the resilient protrusion (11) thus press-contacts the end (21b) of the stepped portion (21) to enable an end (21a) of the stepped portion (21) to tightly contact the fixing plate (10); and braze-welding the fixing plate (10) and the flow channel cap (20). The above-described method eliminates a spot-welding process which might otherwise be performed prior to the process of braze-welding the fixing plate and the flow channel cap in conventional heat exchangers, to thereby reduce manufacturing costs and labor and to improve productivity.