Browse Prior Art Database

Enhanced Cooling Package Using Serpentine Walls and Counter Air Flow

IP.com Disclosure Number: IPCOM000041845D
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Davis, MF: AUTHOR [+2]

Abstract

The cooling structure in Figs. 1A and 1B provides proper cooling for for small electronic enclosures without requiring a fan. The structure includes a cover 1 having four serpentine walls 2. The cover functions as a heat sink which helps dissipate the heat very efficiently. The surface area provided by the enclosure is equivalent to an enclosure with four times the volume. Cooling surfaces are increased by use of the serpentine shape; at the same time the thermal conduction losses across the walls, which are typically plastic, are minimal. Such plastic walls may be low cost but still provide efficient cooling. Electronics 3 dissipates heat into the enclosure air, resulting in air circulation 4. The direction of air flow at the serpentine walls in the enclosure, due to the resultant circulation, is in a downward direction.

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Enhanced Cooling Package Using Serpentine Walls and Counter Air Flow

The cooling structure in Figs. 1A and 1B provides proper cooling for for small electronic enclosures without requiring a fan. The structure includes a cover 1 having four serpentine walls 2. The cover functions as a heat sink which helps dissipate the heat very efficiently. The surface area provided by the enclosure is equivalent to an enclosure with four times the volume. Cooling surfaces are increased by use of the serpentine shape; at the same time the thermal conduction losses across the walls, which are typically plastic, are minimal. Such plastic walls may be low cost but still provide efficient cooling. Electronics 3 dissipates heat into the enclosure air, resulting in air circulation 4. The direction of air flow at the serpentine walls in the enclosure, due to the resultant circulation, is in a downward direction. The downward air flow velocity improves, due to decrease in air temperature and due to heat loss at the wall. On the other hand, the direction of air flow on the outside of the enclosure is upwardly. Thus counter air flow is established across the serpentine dissipating surface without the help of a fan. The design increases the heat dissipating internal surface as well as the external surface. The serpentine wall and the room wall form a channel, thus permitting the back side surface to be effective. The design can operate in a hostile environment, since it is a closed-loop sy...