To improve pressure resistance of a brazed position of a tube to a pipe for a heat exchanger by forming an engaging groove and an engaging part for engaging with two pipe members, and assembling both the members in a pipe-like state in association with the engagement of the groove with the engaging part.
An engaging groove 12 is formed at an opening end of a peripheral wall of one pipe member 7, an engaging part 11 is formed at an opening end of a peripheral wall of another pipe member 6, the part 11 is engaged with the groove 12, and the pipe 1 for a heat exchanger having a refrigerant channel 20 is formed between both the members 6 and 7. In the case of coupling the pipe 1 to the tube 3, an inserting part 4 of the tube 3 is inserted into a tube insertion hole 2 of the member 6, an outer periphery of the tube 3 is brazed to an inner surface 40 of the hole 2, and both lateral outer surfaces 32 of the part 4 are brazed to the inner surface 5 of the pipe 1. Thus, both the members 6 and 7 can be effectively assembled.
KOSAKA TSUNEO
MASUDA TAKEO
