HEAT EXCHANGER

摘要

A heat exchanger comprising a tube (2) for subjecting a medium to heat exchange, header pipes (4) for distributing and collecting the medium, and connectors (8) for joining medium supplying or receiving external pipes thereto, all of which being unitarily assembled and brazed together, wherein the connectors (8) are provided with stepped portions (83) for preventing brazing flux and brazing filler metal from infiltrating into joint surfaces (82) with respect to the external pipes, the stepped portions being formed continuously over the whole of outer circumferences of the connectors (8), the joint surfaces (82) being disposed so as to face in the downward direction with respect to a vertical plane when a flux applying operation is carried out.