Patent ID: 8596998

Claim:
A piezoelectric micro-blower, comprising: a vibrating plate including a piezoelectric element; an inner case to which a peripheral portion of the vibrating plate is fixed, a blower chamber being defined between the inner case and the vibrating plate; a first opening provided in a wall portion of the inner case, the wall portion of the inner case being arranged to face a central portion of the vibrating plate; an outer case arranged to cover an outer periphery of the inner case without being in contact therewith, such that a gap is provided between the inner case and the outer case; a second opening provided in a wall portion of the outer case, the wall portion of the outer case being arranged to face the first opening; a plurality of connecting portions arranged to connect the inner case and the outer case to each other, the plurality of connecting portions being arranged to prevent transmission of vibration from the inner case to the outer case; and a central space provided between the wall portion of the inner case that faces the vibrating plate and the wall portion of the outer case that faces the wall portion of the inner case, fluid introduced from the outside through the gap being guided into the central space, the central space communicating with the first opening and the second opening; wherein the vibrating plate is driven in a bending mode by applying a voltage with a predetermined frequency to the piezoelectric element, such that compressible fluid is sucked into the central space through the gap and is discharged through the second opening.