Heating time control apparatus and method thereof for microwave

Details Heating time control apparatus and method thereof for microwave Heating time control apparatus and method thereof for microwave

1995-03-30

1996-06-25

Leung, Philip H.

Electric heating

Microwave heating

With control system

219719, 219704, 219492, 99325, H05B 668

Patent

active

055302297

ABSTRACT:
An improved heating time control apparatus and a method for a microwave oven capable of detecting food temperature using an infrared ray coming from food being heated, whereby better heating time control can be possible, which includes a key input circuit for inputting a cooking menu and a food kinds; an infrared sensor circuit for detecting a surface temperature of food in accordance with the amount of infrared rays coming from food being cooked and for converting the detected temperature into a predetermined electric signal; a microprocessor for outputting a first heating time previously set in accordance with a selected menu and a second heating time previously set in accordance with a food kinds and for monitoring an output signal outputted from the infrared sensor and for outputting a result obtained by multiplying an output signal difference between points of a first heating time completion and a second heating time completion by a predetermined coefficient as a third heating time; and an output control circuit for controlling an output of microwaves in accordance with an output signal of the microprocessor.

REFERENCES:
patent: 4379964 (1983-04-01), Kanazawa et al.
patent: 4401884 (1983-08-01), Kusunoki et al.
patent: 4629848 (1986-12-01), Yokozeki et al.
patent: 4831227 (1989-05-01), Eke
patent: 4918276 (1990-04-01), Oh
patent: 5155339 (1992-10-01), An

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