Toroidal waveguide for a microwave cooking appliance

Details Toroidal waveguide for a microwave cooking appliance Toroidal waveguide for a microwave cooking appliance

H - Electricity

05

B

H05B 6/80 (2006.01) F24C 7/02 (2006.01) H01P 7/06 (2006.01) H05B 6/70 (2006.01) H05B 6/74 (2006.01)

Patent

CA 2446834

A microwave delivery system for a cooking appliance includes a toroidal waveguide having a ring diameter twice that of the wavelength of the microwaves produced by a magnetron, and a cross-sectional diameter equal to one-half of the produced microwaves. The waveguide includes a plurality of cavity excitation ports through which the microwaves enter a cooking cavity. The delivery system further includes a rotating stirrer positioned within the waveguide. The stirrer includes a plurality of openings which become aligned with the cavity excitation ports when the stirrer is rotated to create a uniform, high energy pattern of microwave energy to enter the cooking cavity. Finally, the waveguide includes a plurality of openings along spaced portions thereof to allow a flow of air through the waveguide.

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