Folded and brazed tube for heat exchanger and heat exchanger including such tubes

摘要

A folded and brazed tube consists of at least one metal band folded over itself to form two parallel channels separated by a cross-piece. The cross-piece is formed by at least one margin of the band, which is locally folded from the tube surface towards its interior. At least one sheet is pressed against the outside of the cross-piece and has an edge flush with the surface of the tube in order to delimit a volume formed in the folding region of the margin which must be filled in during brazing. Applications include the manufacture of vehicle engine cooling radiators.