Microwave oven having vertically adjustable turntable

Details Microwave oven having vertically adjustable turntable Microwave oven having vertically adjustable turntable

1996-07-16

1997-12-09

Leung, Philip H.

Electric heating

Microwave heating

With control system

219704, 219753, 219763, H05B 668, H05B 678

Patent

active

056956720

ABSTRACT:
A microwave oven has a cooking chamber in which a vertically movable turntable is disposed. During the onset of a cooking operation, a control mechanism automatically raises the turntable in step-by-step fashion, and the amount of high frequency waves reflected from the cooking chamber is detected at each vertical position of the turntable. Then, the vertical position of the turntable at which the detected amount of reflective frequency was the lowest is determined, and the turntable is set at that position to continue the cooking operation. If the detected amount of reflective frequency changes, a new vertical position of the turntable at which the amount of reflective frequency is lowest, is re-determined, and the turntable is set at that new position.

REFERENCES:
patent: 4196332 (1980-04-01), MacKay et al.
patent: 4714811 (1987-12-01), Gerling et al.
patent: 4757173 (1988-07-01), Park
patent: 4833304 (1989-05-01), Ueda
patent: 5369252 (1994-11-01), Kondo
patent: 5512736 (1996-04-01), Kang et al.

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