Energy feed system for a microwave oven.

摘要

An energy feed system for microwave ovens includes a rotatable slotted disc (24) arranged within the oven cavity (10) in front of a feeding aperture (22) in a cavity wall (11). The disc (24) is essentially larger than the feeding aperture (22) and arranged at a small distance from the cavity wall (11) so that a narrow space (42') is formed between this wall (11) and the disc (24), through which narrow space (42') microwave energy can propagate radially outwardly. The disc (24) comprises a number of slots (27-29, 46-51), which are oriented transversally to their respective radial position vectors and are dimensioned so as to serve as antenna elements for radiating energy into the interior of the oven cavity (10). Furthermore, the disc (24) is journalled eccentrically so as to perform simultaneously a rotational and a translational motion and the narrow space (42') between the disc (24) and the cavity wall (11) is also utilized for guiding an air stream to impinge on vanes (30-32, 44, 45) secured to the lower side of the disc (24) so as to cause the disc (24) to rotate in a predetermined direction.