Refrigerant tubes for heat exchangers

Details Refrigerant tubes for heat exchangers Refrigerant tubes for heat exchangers

B - Operations, Transporting

21

D

B21D 53/02 (2006.01) B21B 1/22 (2006.01) B21C 37/15 (2006.01) B21C 37/22 (2006.01) B21H 8/00 (2006.01) B23P 15/26 (2006.01) F28D 1/03 (2006.01) F28F 1/02 (2006.01) F28F 3/04 (2006.01)

Patent

CA 2098701

A refrigerant tube for use in heat exchangers comprises a flat aluminum tube having parallel refrigerant passages in its interior and comprising flat upper and lower walls and a plurality of reinforcing walls connected between the upper and lower walls, extending longitudinally of the tube and spaced apart from one another by a predetermined distance. The reinforcing walls are each formed with communication holes for causing the parallel refrigerant passages to communicate with one anther therethrough. The flat aluminum tube is prepared from upper and lower two aluminum sheets by bending opposite side edges of the lower aluminum sheet to a raised form and joining the bent edges to the respective side edges of the upper aluminum sheet which is flat so as to form a hollow portion. The reinforcing walls are formed by joining to the inner surface of the upper wall ridges projecting inward from the lower wall. The communication holes are formed by cutouts formed in the edges of the ridges at a predetermined spacing and having their openings closed with the upper wall.

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