Microwave oven with power switching controller
US5595674A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1995 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | Aug 25, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/68
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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 s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.