| 摘要 |
A small fan with an electric power motor is provided, the rotor of which is designed as a cup-shaped outer rotor and blade wheel hub. The outer wall of the blade wheel hub coaxially widens in the direction of air flow and forms the inner wall of an air flow duct. The fan blades are mounted on this outer wall, which wall, is conical shaped and is disposed as an outer lining over the cup-shaped outer rotor.
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