Microwave oven with heating chamber temperature detecting circui

Details Microwave oven with heating chamber temperature detecting circui Microwave oven with heating chamber temperature detecting circui

1988-11-15

1989-08-15

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055M, 219494, 219510, 99325, 374149, H05B 668

Patent

active

048576867

ABSTRACT:
In a circuit for detecting the heating chamber temperature in a microwave oven, a switching transistor is connected in series or parallel with a heating chamber temperature detecting thermistor. If and when the heating chamber temperature need not be detected, the switching transistor is turned on when the switching transistor and thermistor are connected in parallel and off when the switching transistor and thermistor are connected in series to consequently prevent corrosion of the terminals of such thermistor.

REFERENCES:
patent: 4093841 (1978-06-01), Dills
patent: 4220840 (1980-09-01), Barker
patent: 4266118 (1981-05-01), Takase et al.
patent: 4309584 (1982-01-01), Terakami
patent: 4350858 (1982-09-01), Yoshida
patent: 4469926 (1984-09-01), Komuro
patent: 4568810 (1986-02-01), Carmean

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