Patent ID: 7701097
Filing Date: 2010-04-20
Classification: F04D,H02K

Abstract:
1. A fan, comprising: a stator; a rotor comprising a conducting shell, a hub, and a plurality of blades disposed around the hub, wherein the conducting shell covers at least one side of the stator, and the hub is coupled to the conducting shell and has at least one opening formed on a surface of the hub to partially expose the conducting shell, and at least one airflow passage formed between the hub and an outer surface of the conducting shell and communicated to the opening; and an airflow guiding structure disposed between a top of the hub and the conducting shell or disposed on either the inner wall of the hub or the outer surface of the conducting shell to provide additional suction so as to guide an airflow into the airflow passage faster, wherein the top portion of the conducting shell is substantially sealed so as to prevent foreign objects from entering the motor.