Heat exchange – With coated – roughened or polished surface
Patent
1989-09-14
1990-04-17
Davis, Jr., Albert W.
Heat exchange
With coated, roughened or polished surface
165185, 295273, 164 95, F28F 1906
Patent
active
049171798
ABSTRACT:
A thermoelectric cooling design of the type having a nonconducting substrate mounting thermoelectric coolers is improved. Provisions for a flexible can and improved heat dissipation from the thermoelectric coolers are provided. For improved thermal response, the refrigerated vacuum can is provided with thin walls of high purity aluminum with the result that deformation of the wall surface, especially the bottom wall surface can occur both with respect to installation. A plurality of can heat sinks are placed on the walls of the can to form a unitary and locally rigid side wall to the can at the point of attachment. At least one thermoelectric cooler is communicated to the can heat sinks at a first side for receiving heat energy from the can. A second discharge heat sink is communicated to each thermoelectric cooler for dissipating heat energy from both the can and the thermoelectric cooler. Spring biased connections move the respective heat sinks towards one another and clamp the thermoelectric cooler firmly therebetween. The heat sinks dynamically conform to dimensional changes at the cooler interface during installation. The discharge heat sinks are integrally cast with copper plugs placed in an aluminum mold and the aluminum cast about the copper plugs. The copper plug is preferably gold plated to prevent oxidation and form a heat conducting alloy with the aluminum. This enables heat transfer with a low temperature gradient to produce cooling with high efficiency.
REFERENCES:
patent: 2611585 (1952-09-01), Boling
patent: 3040539 (1962-06-01), Gaugler
patent: 3234048 (1966-02-01), Nelson
patent: 3347453 (1967-10-01), Goergen
patent: 3444695 (1969-05-01), Waye et al.
patent: 4512758 (1985-04-01), Wedemeyer et al.
patent: 4649992 (1987-03-01), Geen et al.
Beckman Instruments Inc.
Davis Jr. Albert W.
Harder Paul R.
Liu Wen
May William H.
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