Wärmetauscher und Verfahren zu dessen Herstellung

摘要

A heat exchanger (1) includes a tank (2,3) having a pipe insertion hole (14,15) disposed in a tank wall (16) and a fluid pipe (4,5) connected to the tank wall (16) for introducing a fluid into the tank or discharging the fluid from the tank. The tank wall (16) has a burr (17) formed around the pipe insertion hole (14,15) extending toward an interior of the tank. The fluid pipe (4,5) has a flange (4b) formed on its periphery by bending the fluid pipe onto itself. An end portion (4c) of the fluid pipe is inserted into the pipe insertion hole (14,15) so that the flange (4b) contacts an outer surface of the tank wall (16), and the inserted end portion (4c) is expanded and caulked together with the burr (17). A brazing material (18) may be fixed between the flange and the tank wall during brazing even during vibration. The length of the pipe inserted into the tank may be minimized. The contact area between the fluid pipe and the tank is thereby enlarged.