Unidirectional heat pipe and wick

Details Unidirectional heat pipe and wick Unidirectional heat pipe and wick

1988-10-24

1990-10-23

Davis, Jr., Albert W.

Heat exchange

Movable heating or cooling surface

Rotary drum

16510426, 165905, 29890032, F28D 1502

Patent

active

049644572

ABSTRACT:
A predominantly unidirectional wick primarily for use in unidirectional heat pipe wicks is disclosed. The wick is made by supporting magnetically susceptible particles on a wire screen and moving the screen inside a magnetic field until the characteristic cone or point shapes assumed by the particles are aligned in a laid down orientation. The particles are then heat treated to yield a sintered wick. An example of the disclosed wick made with nickel powder demonstrates improved wicking in the direction pointed to by the laid down points. The invention also includes a combination with the spinning pipe-slurry method for making heat pipe wicks. Magnetically susceptible powder is mixed into a viscous binder to make a slurry, then injected inside a rotating cylindrical heat pipe container. A magnetic field is created around the spinning container and varied to align the particles in a desired structure. The slurry is dried while still spinning to retain the desired structure and then heat treated to yield a sintered wick.

REFERENCES:
patent: 3613774 (1971-10-01), Bliss, Jr. et al.
patent: 3700028 (1972-10-01), Noren
patent: 3706127 (1972-12-01), Oktay et al.
patent: 3754594 (1973-08-01), Ferrell
patent: 4015659 (1977-04-01), Schladitz
patent: 4060126 (1977-11-01), Schladitz
patent: 4170262 (1979-10-01), Marcus et al.
patent: 4366857 (1983-01-01), Mayer
patent: 4673030 (1987-06-01), Basiulis
patent: 4683940 (1987-08-01), Ernst et al.
Carbone, S. Metallic Wick for a Heat Pipe IBM Disclosure Bulletin, vol. 13, No. 9, 2/1971.

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