Manufacturing method of branch pipe and manufacturing method of heat exchanger with branch pipe

摘要

Problem to be solved: to provide a branching tube capable of being intercalated.SolutionPress fit part 33A connecting pipe 36 having a tube portion 34 having a diameter larger than that of the press fit portion 33 and a tubeIn a manufacturing method of a branch pipe 31 comprising a tube body 32 having a holeTo the hole 37 of the tubular bodyPress fitting portion 33 of the connecting pipe 36 is press fitted.C type filler metalThe one end is fitted to the tube body 32 at a position abutting the connecting pipeSince the connecting pipe 36 brazed in the furnace at a substantially downward posture, it isC type filler material 42 melted by high temperature in the furnaceThrough the outer periphery of the tubeThe hole 37 located below one end of the C-shaped filler material 42 and the press fit portion 33 are injected into the press fit portion and brazed.The number of manufacturing steps of the branch pipe 31 can be greatly reduced.Diagram