Ceramic heat pipe with porous ceramic wick

H - Electricity – 01 – L

Patent

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Details

H01L 23/427 (2006.01) H01L 33/64 (2010.01)

Patent

CA 2738072

A heat pipe for transporting heat from light emitting elements includes a sealed body made of a non-porous ceramic, a vapor channel inside the body that extends between two heat transfer locations spaced apart on an exterior surface of the body, a ceramic wick inside the body that extends between the two heat transfer locations, and a working fluid that partially fills the vapor transport channel. In a method of making this heat pipe, the body and wick are desirably formed together as a seamless monolithic structure made of the same ceramic material. Using a ceramic makes the heat pipe corrosion resistant and allows electrical components like LEDs to be mounted directly on the body because the ceramic is a dielectric.

La présente invention concerne un caloduc destiné à transporter la chaleur provenant d'éléments électroluminescents comprenant un corps scellé fabriqué en céramique non poreuse, un conduit à vapeur à l'intérieur du corps qui s'étend entre deux lieux de transfert de chaleur disposés à distance l'un de l'autre sur une surface extérieure du corps, une mèche en céramique à l'intérieur du corps qui s'étend entre les deux lieux de transfert de chaleur, et un fluide actif qui remplit partiellement le conduit de transport de vapeur. Dans un procédé de fabrication de ce caloduc, le corps et la mèche sont formés ensemble sous la forme d'une structure monolithique sans soudure, fabriquée dans le même matériau céramique. L'utilisation d'une céramique rend le caloduc résistant à la corrosion et permet aux composants électriques tels que les DEL d'être montés directement sur le corps car la céramique est un diélectrique.

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