Inner ribbed tube and method

Details Inner ribbed tube and method Inner ribbed tube and method

1990-12-26

1993-02-09

Flanigan, Allen J.

Heat exchange

Tubular structure

With discrete heat transfer means

138171, F38F 140

Patent

active

051846748

ABSTRACT:
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 seam welding the plate at the longitudinal adjacent edges thereof to make the inner spiral ribbed tube.

REFERENCES:
patent: 1928639 (1933-10-01), Berg
patent: 2817364 (1957-12-01), Crawford
patent: 3753364 (1973-08-01), Runyan et al.
patent: 4044797 (1977-08-01), Fujie et al.
patent: 4164243 (1979-08-01), Cookson et al.
patent: 4658892 (1987-04-01), Shinohara et al.

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