Slit fin coil and the method of making coils

Details Slit fin coil and the method of making coils Slit fin coil and the method of making coils

1986-02-03

1987-01-06

Davis, Jr., Albert W.

Heat exchange

Side-by-side tubular structures or tube sections

165184, 291573AH, F28F 136

Patent

active

046339418

ABSTRACT:
A slit fin heat exchanger is formed by wrapping slit fin tubing into a flat coil having two spaced rows of tubing. The flat coil is located on mandrels which are rotatable about spaced parallel axes with the mandrels and axes initially being in the same plane. A piece of expanded metal is placed between the two rows. The mandrels are rotated about their axes in opposite directions which shifts the plane in which the coil is located. The shifting of the plane of the coil moves a portion of a first row of the coil into contact with a planar portion of a platen and the second row of the coil into a nesting relationship with the portion of the first row which is in contact with the planar portion of the platen and the piece of expanded metal. Continued rotation of the mandrels causes folding of the portions of the coil which extends the area of nesting. The folding takes place through up to 120.degree. and the ends of the first row of the coil contact a portion of the platen causing the formation of a knob at the end of each coil. The piece of expanded metal serves to support the coil such that tube supports are not necessary.

REFERENCES:
patent: 2983300 (1961-05-01), Abbott
patent: 3294162 (1966-12-01), Loehlein et al.
patent: 3368615 (1968-02-01), Brown et al.
patent: 4231421 (1980-11-01), Eaton et al.
patent: 4380263 (1983-04-01), Wright
patent: 4434841 (1984-03-01), Jackson

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