Electrically insulated envelope heat pipe

Details Electrically insulated envelope heat pipe Electrically insulated envelope heat pipe

1996-02-27

1997-07-01

Rivell, John

Heat exchange

Intermediate fluent heat exchange material receiving and...

Liquid fluent heat exchange material

165 46, F28D 1500

Patent

active

056427760

ABSTRACT:
The disclosure is for a heat pipe in the form of a simple foil envelope and a method of constructing such a heat pipe. Two plastic coated metal foil sheets are sealed together on all four edges to enclose a semi-rigid channeled sheet of plastic foam, and the envelope is evacuated and loaded with a suitable quantity of liquid to act as a heat pipe. Despite the use of the essentially poor thermally conductive materials such as the plastic coating on the surface of the casing and the foam plastic for the wick, the apparatus operates well as a heat spreader for an integrated circuit chip placed in contact with the envelope surface. The heat is transferred across the thin plastic coating with only a small temperature differential, and the foam plastic wick with channels efficiently transports condensed liquid back to the heat input location for evaporation.

REFERENCES:
patent: 3613778 (1971-10-01), Feldman, Jr.
patent: 3943964 (1976-03-01), Asselman et al.
patent: 4212347 (1980-07-01), Eastman
patent: 4279294 (1981-07-01), Fitzpatrick et al.
patent: 5000256 (1991-03-01), Tousignant
patent: 5343940 (1994-09-01), Jean
patent: 5411077 (1995-05-01), Tousignant
patent: 5458189 (1995-10-01), Larson et al.
patent: 5485671 (1996-01-01), Larson et al.

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