Patent ID: 8246324

Claim:
A piezoelectric fan assembly comprising: a case defining an air outlet; a fan arranged in the case, comprising: a mandrel positioned in the case; at least one swing member mounted to the mandrel with a first end of each of the at least one swing member, wherein each of the at least one swing member comprises a piezoelectric element; a circular connecting portion encircling the mandrel and connected to a second end of each of the at least one swing member; and a plurality of fan blades mounted to the connecting portion, wherein the plurality of fan blades are operable to generate airflow in response to the piezoelectric element receiving alternating current power to swing to drive the connecting portion to swing; and a guide plate mounted in the case and encircling the fan, wherein a wind channel is formed between the case and the guide plate, a plurality of openings are defined in the guide plate corresponding to the plurality of fan blades, wherein airflow formed by the swinging of the plurality of fan blades is transferred into the wind channel through the plurality of openings and is exhausted out of the wind channel through the air outlet.