Patent ID: 7021670

Claim:
A joint for joining a double pipe to first and second circuit pipes, the double pipe comprising an outer pipe for transfer of a first fluid, an inner pipe for transfer of a second fluid, and plural ribs for connecting the outer pipe and the inner pipe, comprising: a flange including a first through bore and a second through bore; a branch portion comprising: a first connection portion for connection of the first circuit pipe, the first connection portion being inserted into the first through bore; a first junction portion for joining the outer pipe of the double pipe, the first junction portion comprising a stopper for stopping an end of the outer pipe of the double pipe; an inner flow path communicating the first connection portion and the first junction portion so as to transfer the first fluid between the first circuit pipe and the outer pipe of the double pipe; and a second junction portion for joining the inner pipe of the double pipe, the second junction portion comprising a through hole and a first support portion for supporting brazing filler metal for brazing the inner pipe of the double pipe with the second junction portion, the inner pipe passing through the through hole; and a connection pipe having a first end and a second end, the first end being brazed with the inner pipe of the double pipe and the second end being inserted into the second through bore and defining a second connection portion for connection of the second circuit pipe, whereby the connection pipe transfers the second fluid between the second circuit pipe and the inner pipe of the double pipe.