Heat transfer tube for condensation and method for manufacturing

Details Heat transfer tube for condensation and method for manufacturing Heat transfer tube for condensation and method for manufacturing

1979-05-03

1981-01-20

Richter, Sheldon

Heat exchange

With coated, roughened or polished surface

165184, F28B 908, F28F 136

Patent

active

042456959

ABSTRACT:
A heat transfer tube for condensation easily obtainable through an additional machining process applied to a low fin tube and a method for manufacturing the same. There is formed a toothed wheel-like part having mountain and valley parts alternately and continuously arranged on the outer circumferential fin part of the low fin tube. Each of the mountain parts is formed into a pyramid-like shape having a transverse cross section of approximately a long snare hand drum-like shape in which longer sides are disposed along grooves provided between the fins of the tube and are arranged to be concave curvatures each resembling an arc. The two slanting faces of the mountain part including these longer sides of the pyramid-like shape gradually and smoothly slant from the top of the pyramid to the bottom thereof. The heat transfer tube for condensation is manufactured by carrying out a transforming process applied to the outer circumference of fins of a low fin tube in the longitudinal direction of the fin tube.

REFERENCES:
patent: Re30077 (1979-08-01), Kun et al.
patent: 3326283 (1967-06-01), Ware
patent: 3566514 (1971-03-01), Szumigala
patent: 4040479 (1977-08-01), Campbell et al.
patent: 4059147 (1977-11-01), Thorne
patent: 4166498 (1979-09-01), Fujie et al.

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