Food weight detecting device for a microwave oven

Details Food weight detecting device for a microwave oven Food weight detecting device for a microwave oven

1994-01-12

1994-11-29

Leung, Philip H.

Electric heating

Microwave heating

With control system

219518, 177210R, 177145, H05B 668

Patent

active

053692543

ABSTRACT:
A food weight detecting device for a microwave oven which can detect food weight exactly according to the speed variation of the rotating roller rolling on a base plate having a protrusion formed thereon with predetermined ascending and descending angles. According to the device, the possibility of incorrect weight detection due to such defects as corrosion or secular change of a parallel plate capacitor in the conventional capacitance- detection type device can be eliminated. Thus, reliability of automatic heating control is increased and an inexpensive motor which needs not be heat-resistant can be employed.

REFERENCES:
patent: 4544042 (1985-10-01), Mikami
patent: 4683967 (1987-08-01), Hanatani et al.
patent: 4875533 (1989-10-01), Mihara et al.
patent: 4895067 (1990-01-01), Ohji et al.

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