Heat dissipation mechanism and electric fan

The utility model discloses a heat dissipation mechanism and an electric fan, the heat dissipation mechanism comprises a fan motor, and the fan motor drives fan blades to rotate; hubs of the fan blades are hollow, and ventilation openings are formed in the hubs; heat dissipation fan blades are arranged in the ventilation openings, and airflow generated by rotation of the heat dissipation fan blades blows through the fan motor so as to cool the fan motor. According to the heat dissipation mechanism provided by the utility model, the heat dissipation fan blades facing the air flow channel are arranged in the hub, so that the heat dissipation capability of the motor can be remarkably improved, and the heat dissipation mechanism is simple in structure, easy to implement, free of additional parts and relatively low in cost. 本实用新型公开了一种散热机构及电风扇，其中散热机构包括风扇电机，风扇电机驱动风扇扇叶转动；风扇扇叶的轮毂中空设置，形成有通风口；通风口内设置有散热风叶，散热风叶转动产生的气流，吹过风扇电机，以风冷风扇电机。本实用新型所述的散热机构，通过在轮毂中设置朝向空气流道的散热风叶，可显著提升电机散热能力，且结构简单，易实现，不用增加额外零部件，成本较低。