Electric heating – Microwave heating – With control system
Patent
1995-08-25
1997-01-21
Leung, Philip H.
Electric heating
Microwave heating
With control system
219721, 219723, H05B 668
Patent
active
055956742
ABSTRACT:
An improved controller for a microwave oven capable of preventing it from an undesired heating caused by an erroneous operation thereof, which includes a heating member for generating heating energy; a power switch for controlling electric power supply to the heating member; a switch module including a plurality of switches for selecting a desired function; a microcomputer for outputting scanning signals having predetermined time differences to the switch module and for outputting a predetermined control signal in accordance with a key input signal outputted from the switch module; and a controller for controlling the power switch in accordance with control signals outputted from the microcomputer and a signal applied from the switch module, wherein the control signals includes a latch signal maintaining a predetermined state after the output signal of a switch is detected, while having the same level as a scanning signal outputted from a switch which is selected by an operation mode corresponding to scanning signals outputted from the switch module, and a power control signal which is transferred from a first state to a second state after the latch signal becomes a predetermined state and another predetermined time is lapsed while maintaining the first state.
REFERENCES:
patent: 4232210 (1980-11-01), Oida et al.
patent: 4481393 (1984-11-01), Ueda
patent: 4533810 (1985-08-01), Harmon et al.
patent: 4719326 (1988-01-01), Yoo
patent: 4987556 (1991-01-01), Aoki
Leung Philip H.
LG Electronics Inc.
LandOfFree
Microwave oven with power switching controller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microwave oven with power switching controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microwave oven with power switching controller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2322101