Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1983-05-23
1985-08-13
Pellinen, A. D.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
16510433, 174 16R, 361381, H05K 720
Patent
active
045353867
ABSTRACT:
Natural convection cooling of power carrying electronic components mounted within an enclosure is achieved by mounting the power components at the base of the enclosure at the opening of an inner chimney which separates the enclosure interior into forward and rearward compartments. The inner chimney serves to duct the heated air rising from the components at the base of the enclosure forward compartment to the top of the enclosure. A heat exchanger is mounted on the inside face of the enclosure door to provide a cooled surface so that warm air at the top of the enclosure forward compartment is drawn downwardly along the heat exchanger surface to the base of the enclosure thereby creating natural air turbulence within the enclosure. Natural convection cooling is further improved by adding a plurality of heat sinks to the chassis base so that the heat sink fins extend into the rearward compartment which forms an outer chimney by virtue of air ducts being provided in the front and top walls of the enclosure in communication of the rearward compartment. The outer chimney creates an increased draft of cool air along the fins thereby reducing the average temperature of the air rising through the fins. In this way, convection cooling is achieved without the need for separate mechanical air handling equipment.
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U.S. patent application Ser. No. 379,179 "Heat Exchanger for Industrial Control Enclosures" filed by Richard Bentley et al., May 17, 1982.
Frey, Jr. Sydney W.
Herson Mark I.
Allen-Bradley Company
Pellinen A. D.
Sammons Barry E.
Thompson Gregory D.
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