Electric heating – Metal heating – Of cylinders
Patent
1986-09-22
1987-09-01
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1055E, 99DIG14, H05B 674
Patent
active
046910883
ABSTRACT:
A microwave oven has a magnetron which launches microwave power into a cavity of the oven through an aperture in the base of the cavity. A metal tray, which may be a shelf or a rotatable turntable is supported above the aperture in a predetermined disposition so that the oven when devoid of food presents a poor power match with the magnetron in terms of effectiveness of power transfer from the magnetron into the oven cavity. As a result, the dielectric load of food items placed in the oven determines the power coupled to the loaded oven from the magnetron and the power transfer automatically increases in proportion to the dielectric food load in the oven. A forced hot air system blows hot air through the cavity, so that food items on the tray are cooked by the simultaneous application of microwave power and the hot air.
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Leung Philip H.
Microwave Ovens Limited
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