Inner ribbed tube and method

Details Inner ribbed tube and method Inner ribbed tube and method

F - Mech Eng,Light,Heat,Weapons

28

F

F28F 1/40 (2006.01) B21C 37/06 (2006.01) B21C 37/08 (2006.01) B21C 37/20 (2006.01)

Patent

CA 2058127

A heat exchanger inner spiral ribbed tube and method of manufacture therefor for use in making a refrigerator condenser or a refrigerator evaporator. The tube has an annular wall having an inner surface. The inner surface has a plurality of inner spiral ribs, each having a spiral angle. The spiral angle is between 0 degrees and 90 degrees; and is 45 degrees in the described embodiment. The tube making method includes the steps of swaging a plain plate between a plain roller and a grooved roller to make a ribbed plate; then forming seam welding the plate at the longitudinal adjacent edges thereof to make the inner spiral ribbed tube.

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