Method of forming a multiple coil heat exchanger

Details Method of forming a multiple coil heat exchanger Method of forming a multiple coil heat exchanger

1982-09-20

1986-07-15

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29727, B23P 1526

Patent

active

045997730

ABSTRACT:
A compact multiple coil heat exchanger having a high heat transfer density is provided to include at least an inner coil formed from a continuous tube into a plurality of contiguous turns about a common axis in a spiral arrangement and having a pitch in one direction and an outer coil formed from the continuous tube into a plurality of overlapping turns concentrically about the inner coil in a spiral arrangement having an opposite pitch. Further, a coil-forming apparatus and continuous coil-forming method is directed to form a multiple coil heat exchanger from a continuous tube using a coil-forming die rotatably mounted on a support frame. The coil-forming die includes a continuous spiral thread constructed to receive and laterally support the continuous tube while fabricating the multiple coil heat exchanger according to the continuous coil-forming method of this invention. The thread of the coil-forming die terminates at one end thereof at a coil-reversing plate having a first portion which spirals outward to a radial position above the thread and a second portion which axially extends towards the opposite end of the coil-forming die to form a one-piece multiple coil heat exchanger.

REFERENCES:
patent: 1799081 (1931-03-01), Blomqvist
patent: 1802161 (1931-04-01), Summers
patent: 1993171 (1935-03-01), Hyde
patent: 3335790 (1967-08-01), Aranyi et al.
patent: 4195653 (1980-04-01), Cessou
patent: 4424624 (1984-01-01), Sievers

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