Thermoelectric cooling assembly with thermal space transformer i

Details Thermoelectric cooling assembly with thermal space transformer i Thermoelectric cooling assembly with thermal space transformer i

1999-08-05

2000-12-26

Doerrler, William

Refrigeration

Using electrical or magnetic effect

Thermoelectric; e.g., peltier effect

622592, F25B 2102

Patent

active

06164076&

ABSTRACT:
A thermoelectric cooling assembly is provided having at least a first thermoelectric stage thermally coupled to a heat source, such as an electronic device, and a second thermoelectric stage thermally coupled to the first thermoelectric stage across a "thermal space transformer". The first thermoelectric stage has a first surface area for thermal dissipation and the second thermoelectric stage has a second surface area for thermal absorption wherein the second surface area is greater than the first surface area. The thermal space transformer has a first thermal conductivity in a plane transverse to a direction of primary heat flow through the first thermoelectric stage and the second thermoelectric stage, and a second thermal conductivity in a direction parallel to the direction of primary heat flow, wherein the first thermal conductivity is greater than the second thermal conductivity. In one embodiment, the thermal space transformer can comprise a graphite composite material with diamond coating on both main surfaces thereof. The thermoelectric cooling assembly can further comprise: a cold plate; a refrigeration unit coupled to the cold plate; a dc power controller for controlling dc power through the first and second thermoelectric stages; and a temperature sensor for providing feedback information to the dc power controller on temperature of the electronic device being cooled.

REFERENCES:
patent: 4812733 (1989-03-01), Tobey
patent: 5456081 (1995-10-01), Chrysler et al.
patent: 5940784 (1999-08-01), El-Husayni
patent: 5966939 (1999-10-01), Tauchi
Sara Godfrey, Melcor Corporation, "Electronics Cooling: An introduction to thermoelectric coolers", http://www.electronics-cooling.com/Resources/EC.sub.- Articles/Sep96/sep96.sub.- 04.htn, (Sep. 1996), 7pp.

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