Microwave oven with magnetic field detecting device
First Claim
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1. A microwave oven comprising:
- a magnetron for generating microwaves;
a waveguide for guiding the microwaves to a cooking chamber, said waveguide having a detection opening formed through one sidewall for allowing a magnetic field, generated by standing waves formed in the waveguide, to be discharged from the waveguide; and
a printed circuit board disposed on an outer surface of said sidewall, said printed circuit board comprising;
an antenna sensor for sensing said magnetic field discharged from the waveguide; and
a pair of openings through said printed circuit board and disposed over said detection opening, said antenna sensor being disposed between said pair of openings.
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Abstract
Disclosed herein is a microwave oven with a magnetic field detecting device. The microwave oven includes a magnetron for generating microwaves and a wave guide for guiding the microwaves to a cooking chamber. A detection opening is formed in one side of the wave guide to allow a magnetic field generated by standing waves formed in the wave guide to be discharged from the wave guide. The magnetic field detecting device is formed on a board mounted on the wave guide to detect the magnetic field discharged through the detection opening.
22 Citations
8 Claims
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1. A microwave oven comprising:
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a magnetron for generating microwaves;
a waveguide for guiding the microwaves to a cooking chamber, said waveguide having a detection opening formed through one sidewall for allowing a magnetic field, generated by standing waves formed in the waveguide, to be discharged from the waveguide; and
a printed circuit board disposed on an outer surface of said sidewall, said printed circuit board comprising;
an antenna sensor for sensing said magnetic field discharged from the waveguide; and
a pair of openings through said printed circuit board and disposed over said detection opening, said antenna sensor being disposed between said pair of openings. - View Dependent Claims (2, 3, 4)
a plurality of attachment projections extending above said outer surface of said sidewall between which said printed circuit board is disposed;
a first securing hole disposed through said sidewall;
a second securing hole disposed through said printed circuit board; and
a bolt passing through said first and second securing holes for securing said printed circuit board to said sidewall.
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5. A microwave oven comprising:
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a magnetron for generating microwaves;
a waveguide for guiding the microwaves to a cooking chamber, said waveguide having a detection opening formed through one sidewall for allowing a magnetic field, generated by standing waves formed in the waveguide, to be discharged from the waveguide; and
a circuit board disposed on an outer surface of said sidewall, said circuit board comprising;
a magnetic conductive printed circuit forming an antenna sensor for sensing said magnetic field discharged from the waveguide; and
a pair of rectangular openings extending through said circuit board and disposed over said detection opening, said antenna sensor being disposed between said pair of rectangular openings. - View Dependent Claims (6, 7, 8)
a plurality of attachment projections extending above said outer surface of said sidewall between which said circuit board is disposed;
a first securing hole disposed through said sidewall;
a second securing hole disposed through said circuit board; and
a bolt passing through said first and second securing holes for securing said circuit board to said sidewall.
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7. The microwave oven as set forth in claim 5, said circuit board further comprising a diode for rectifying an alternating current induced into said antenna sensor by said magnetic waves.
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8. The microwave oven as set forth in claim 7, said circuit board further comprising a capacitor and a resistor coupled in parallel between an output terminal of said diode and a ground terminal.
Specification