Microwave oven cavity including a grill element
AssigneeWhirlpool Europe B.V.
InventorsKurt H. Carlsson, Dan Carlsson
Life of this patent
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Abstract
A microwave oven with an oven cavity and a microwave feed system which produces a microwave distribution of polarized microwaves with essentially defined field vector orientations relative to one of the walls of the cavity. A zone defining an expansion of volume which opens into the cavity and whose dimensions are tuned to the wavelength and field distribution in the cavity, is disposed in a wall of the cavity. The expansion does not affect the effective field distribution in the cavity and can be used for concealed placement of a grill element or light source.
Claims5
A microwave oven comprising an oven cavity having a given volume into which a food item is placed during cooking, the cavity being enclosed by walls in conjunction with an oven door, and a microwave source with associated microwave input means for producing a microwave field in the cavity during cooking operation, comprising a zone defined by an expansion of one of said walls, said zone increasing said given volume for said cavity, said zone having one side thereof opening into said cavity, and dimensions that are tuned to the wavelength and field pattern of the microwave field in the cavity, including length of the expansion zone in the direction of microwave propogation along said wall essentially corresponding to a whole number of microwave half wavelengths, and said input means is arranged to input microwaves which are polarized such that the electric field vector of the microwave field is formed substantially at right angles to a plane defined by said one side opening into said cavity and the magnetic field vector of the microwave field is directed substantially parallel to said plane.
Dependencies are inferred from the claim text.