Electric heating – Microwave heating – With control system
Patent
1998-01-26
1999-12-14
Hoang, Tu Ba
Electric heating
Microwave heating
With control system
219754, H05B 668
Patent
active
060021195
ABSTRACT:
A control circuit and a method of control of a microwave oven is disclosed. The control circuit having a magnetron, a door to the microwave oven's cooking chamber, a turntable installed in the cooking chamber, and a turntable motor, includes a main relay that controls the power applied to each load, including the magnetron and the turntable motor; a power relay controlling an output of the magnetron; a turntable motor relay controlling the power applied to the turntable motor; a door switch sensing the opening and closing of the door; a first switch interlocked with the door switch and controlling the power applied to the turntable motor and the magnetron as the door is opened and closed; and a turntable motor solely driver driving the turntable motor independently of the magnetron when the door is opened. The method of controlling the oven includes the steps of determining if a given period of cooking time lapses; determining if the door is opened; stopping the magnetron and the turntable motor; driving the turntable independently.
REFERENCES:
patent: 4629846 (1986-12-01), Dilyard
patent: 4743727 (1988-05-01), Joon-Yoen
patent: 4939333 (1990-07-01), Sakai et al.
patent: 5345068 (1994-09-01), Hatano et al.
Hoang Tu Ba
Samsung Electronics Co,. Ltd.
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