| 摘要 |
In a fan motor, a fan boss of a fan is integrally rotatably connected to a housing of a drive motor unit. A plurality of fins axially extends from an inner surface of a bottom portion of the fan boss toward a bottom portion of the housing of the drive motor unit and radially inwardly extends from an inner peripheral surface of a tubular portion of the fan boss to create a cooling air flow from an interior of the housing toward an outside of the housing through cooling holes of the housing upon rotation of the fan boss. Each of the plurality of fins includes an auxiliary fin at a location, which is axially opposed to a corresponding one of the at least one cooling hole, to facilitate creation of the cooling air flow upon the rotation of the fan boss.
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