Microwave oven with infrared temperature detector

Details Microwave oven with infrared temperature detector Microwave oven with infrared temperature detector

1982-05-26

1984-07-24

Envall, Jr., Roy N.

Electric heating

Metal heating

Of cylinders

219 1055F, 250351, 250341, 350 65, 374121, 374149, H05B 668

Patent

active

044619413

ABSTRACT:
The microwave oven includes a heat chamber, an infrared detector for detecting infrared rays irradiated from an object to be heated in the heating chamber, a chopper for alternately interrupting the path of infrared rays to the detector, an oscillator for producing a reference signal used for driving the chopper, and a circuit for regulating the output of the detector and the phase of the reference signal. The infrared detector does not require any phase adjustment to accommodate frequency shifts due to fluctuations in the power frequency.

REFERENCES:
patent: 4245143 (1981-01-01), Miura et al.
patent: 4286134 (1981-08-01), Nakata et al.
patent: 4347418 (1982-08-01), Nobug et al.

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