Electric heating – Microwave heating – Field modification
Patent
1992-05-06
1994-12-20
Evans, Geoffrey S.
Electric heating
Microwave heating
Field modification
219687, 219710, 604114, 604409, H05B 678
Patent
active
053748115
ABSTRACT:
An improved method and apparatus for safely and rapidly rewarming large quantities of frozen or refrigerated blood combines microwave, or radio frequency radiation, heating with a forced air system. Forced air is flowed over units of blood or tissue from those units that will absorb the most microwave energy, generally those units closest to the source of microwave energy, to those units that will absorb the least microwave energy, generally those units furthest from the source of microwave energy. The forced air initially thaws the closest units so that they begin to absorb significant microwave energy. The forced air, preferably chilled, then prevents overheating of those closest units by transferring heat to more distant units, beginning their thawing and contributing to their rewarming. The microwave energy source is turned off when the output temperature of the forced air reaches a preselected temperature and the flow of forced air continues until the output temperature stabilizes. The apparatus includes a separated stack of perforated plates, each plate holding two units, mounted inside a microwave oven. Forced air drives a turbine rotor which rotates the plates while the air leaving the turbine flows down among the stacked plates and out the microwave oven.
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Erwin David N.
Kiel Johnathan L.
McQueen Christopher
Simmons David M.
Evans Geoffrey S.
Hoang Tu
Kundert Thomas L.
Sinder Fredric L.
The United States of America as represented by the Secretary of
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