| 摘要 |
A fan with heated circulating blades which includes a longitudinally extending heating element mounted in a slot defined extending along the surface of some of the fan blades for heating of air blow outwardly therefrom. A resilient biasing device such as a flat spring is mounted at various location in the fan blades to bias the heating element into the slot for retaining it therewithin. A ball bearing configuration is included for providing electrical power to the heating elements while the fan rotates. A bearing apparatus is included with at least two bearings each individually maintained in electrically conductive abutment with respect to conductive rings mounted within the fan hub electrically insulated from each other. Each ring is electrically conductive with respect to one end of each heating element in each blade for heating thereof particularly during fan rotation.
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