Patent ID: 7861767

Claim:
An airflow generating device comprising: a housing; a pressure changing mechanism which produces a pressure change in a gas inside of said housing and includes a vibrating member within said housing in a spaced a part distance with respect to the walls of said housing; a resilient supporting member having a first edge attached to said vibrating member and a second edge attached to a side wall of said housing; a first opening in said housing disposed at a distance from a peripheral edge portion of said vibrating member; a first chamber inside of said housing and in fluid communication with said first opening; a heat sink disposed outside of the housing; and a nozzle on a side surface of said housing through which the gas flows in and out of said first chamber, wherein, said resilient supporting member is located a horizontal distance d, from said nozzle, where 1 mmâ‰¦dâ‰¦30 mm, said vibrating member has a distance r from the center of said vibrating member to a closest peripheral edge portion of said vibrating member of 5 to 100 mm, said pressure changing mechanism discharges said gas through said first opening generating a first airflow at a first flow velocity v 1 through said first opening, and a second airflow at a second flow velocity v 2 in said first chamber such that said second flow velocity v 2 is less than said first flow velocity v 1 , said nozzle has a cross sectional area S 1 and an airflow rate v 1 , said first chamber has a cross-sectional area S 2 in said first chamber parallel to said cross sectional area S 1 , and said pressure generating mechanism generates an airflows such that v 2 /S 2 â‰¦v 1 /S 1 .