| 摘要 |
<p>9D-RG-14198 A mode stirrer arrangement for a microwave oven is disclosed wherein the stirrer is driven by means of an air flow which does not impinge on the mode stirring blades themselves. The mode stirrer blades are carried on one end of a rotatable shaft and positioned in the path of microwave energy entering the oven cooking cavity. The other end of the shaft carries a drive fan which is separated from the mode stirrer blades by an air imprevious wall and a stream of air is directed onto the drive fan to thereby rotate the shaft and mode stirrer blades. The stream of air onto the drive fan is provided via an air channel which communicates with the magnetron cooling blower. An upstanding cylindrical bearing made of a dielectric material supports the shaft for rotation, the top surface of the bearing being tapered to provide a seat of reduced contact area to reduce frictional losses during rotation.</p> |
