Heat exchanger

Details Heat exchanger Heat exchanger

1994-12-21

1996-09-24

Rivell, John

Heat exchange

With means flexing, jarring or vibrating heat exchange surface

165122, 165152, F28D 1106

Patent

active

055581560

ABSTRACT:
A heat exchanger has heat exchange members for performing heat exchanging with a fluid to flow along surfaces thereof. Fins are fixed, at only one end thereof in the direction of flow of the fluid, to the respective heat exchange members in a cantilevered manner. Each of the fins has a piezoelectric material layer laminated on at least one of the surfaces of each fin. Vibrations are given to the fins, with the fixed end thereof operating as a fulcrum, by applying an alternating voltage to the piezoelectric material layer such that the fins are extended and contracted in the direction of the flow of the fluid. As a modified example, each fin may be provided at its rear end with a weight. Piezoelectric actuators are disposed inside a frame in which the heat exchanger is contained, in a manner to pinch the heat exchanger in a vertical direction. By causing the actuators to vibrate, the fins are also vibrated.

REFERENCES:
patent: 3265127 (1966-08-01), Nickol et al.
patent: 4406323 (1983-09-01), Edelman
patent: 4469168 (1984-09-01), Itoh et al.
patent: 4501319 (1985-02-01), Edelman et al.
patent: 4595338 (1986-06-01), Kolm et al.
patent: 4693307 (1987-09-01), Scarselletta
patent: 4892143 (1990-01-01), Ishii
patent: 4923000 (1990-05-01), Nelson
patent: 5335143 (1994-08-01), Maling, Jr. et al.

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