Automatic thawing apparatus for a microwave oven

Details Automatic thawing apparatus for a microwave oven Automatic thawing apparatus for a microwave oven

1994-12-23

1996-05-21

Leung, Philip

Electric heating

Microwave heating

With control system

219710, 219494, 99325, H05B 668

Patent

active

055191940

ABSTRACT:
An improved automatic thawing apparatus for a microwave oven capable of advantageously thawing food which includes a heating chamber for a food placement therein; a microwave generator for providing microwave energy into the heating chamber in order to heat the food therein; at least one amplifier for amplifying signals detected by a thawing state detection circuit to a predetermined level; a bias voltage control circuit for generating bias signals for initializing an output signal of the amplifier to a predetermined level in beginning of the thawing operation; and a control circuit for controlling the initialization of the output signal of the amplifier to the predetermined level by controlling the bias voltage control circuit, for judging the thawing state of the food in the heating chamber in response to the signal outputted from the amplifier, and for outputting control signals to the microwave generator in accordance with such judgement.

REFERENCES:
patent: 4210795 (1980-07-01), Lentz
patent: 4335293 (1982-06-01), Kobayashi et al.
patent: 4420668 (1983-12-01), Larson et al.
patent: 4430540 (1984-02-01), Scalf
patent: 4484050 (1984-11-01), Horinouchi et al.
patent: 4599503 (1986-07-01), Ueda
patent: 4841111 (1989-06-01), Kokkeler et al.
patent: 4952766 (1990-08-01), McDonald
patent: 5237141 (1993-08-01), Yoshino et al.

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