| 摘要 |
An all season fan with heated circulating blades which includes a heating elements mounted in slots defined in the rear surface of the fan blades for heating of air blown outwardly therefrom. Resilient biasing devices such as a bow springs are mounted in the fan blades extending over the slots to retain the heating elements in the slots. Electrically conductive ball bearings are included to facilitate rotation of the fan blade and hub while simultaneously providing electrical power to the heating elements during fan rotation. At least two bearings each individually maintain separate electrically conductive abutment respect to two separate conductive rings mounted in an insulating insert within the fan hub. Each ring is electrically conductive with respect to one end of each heating element for heating thereof during fan rotation.
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