Electronic unit having desired heat radiation properties
First Claim
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1. An electronic unit comprising:
- a metal housing;
a plurality of electronic devices stored in the housing, one of which is a heat-generating device, the plurality of electronic devices being separated from each other by a predetermined distance to balance thermal interference therebetween; and
a sheet of paper having a thermal emissivity higher than the housing and which is adhered to an outer surface of the metal housing over a predetermined area of the metal housing to improve radiation of heat generated by the heat-generating device from the metal housing.
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Abstract
An electronic unit includes a housing and a plurality of heat-generating electronic devices. The devices are stored in the housing. The heat generated by the devices is transferred to the housing and further transferred to ambient air from the housing to cool the electronic unit. A sheet of paper, which is made of art paper having a thermal emissivity higher than the housing, is adhered to an outer surface of the housing to improve the heat radiation from the housing to the ambient air.
10 Citations
18 Claims
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1. An electronic unit comprising:
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a metal housing;
a plurality of electronic devices stored in the housing, one of which is a heat-generating device, the plurality of electronic devices being separated from each other by a predetermined distance to balance thermal interference therebetween; and
a sheet of paper having a thermal emissivity higher than the housing and which is adhered to an outer surface of the metal housing over a predetermined area of the metal housing to improve radiation of heat generated by the heat-generating device from the metal housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
the ceramic substrate is attached to a heat-transfer fin that includes a plurality of recesses formed on corners thereof, the metal housing includes a plurality of projections formed on an inner surface thereof, and at least two pairs of the plurality of recesses and projections interconnect to thereby form interconnection surfaces for transferring heat generated by the at least one heat-generating device from the heat transfer fin to the housing for radiation by the sheet of paper.
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14. The electronic unit as in claim 13, wherein each of the interconnection surfaces has an area of about 60 mm2.
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15. An electronic unit comprising:
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a metal housing;
a heat-generating electronic device stored in the housing; and
a sheet of paper having a thermal emissivity higher than the housing and which is adhered to an outer surface of the metal housing over a predetermined area of the metal housing corresponding to a location of the heat-generating device to improve radiation of heat generated by the heat-generating device from the metal housing. - View Dependent Claims (16, 17, 18)
the ceramic substrate is attached to a heat-transfer fin that includes a recess formed on a corner thereof, the metal housing includes a projection formed on an inner surface of the metal housing, and the recess and the projection interconnect to thereby form an interconnection surface for transferring heat generated by the heat-generating device from the heat transfer fin to the housing for radiation by the sheet of paper.
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18. The electronic unit as in claim 17, wherein the interconnection surface has an area of about 60 mm2.
Specification