Patent ID: 8678787

Claim:
A piezoelectric micro-blower comprising: a blower body; a diaphragm secured to the blower body at a perimeter thereof and including a piezoelectric element; a first wall attached to the blower body and positioned so as to define a blower chamber between the diaphragm and the first wall, the first wall including a first opening facing a center of the diaphragm, the first opening being in fluid communication with the blower chamber; a second wall spaced from the first wall and disposed opposite the blower chamber with the first wall interposed between the second wall and the blower chamber, the second wall including a second opening facing the first opening; and an inflow path disposed between the first wall and the second wall, the inflow path including outer ends communicating with the outside of the piezoelectric micro-blower and inner ends connected to the first opening and the second opening; and a center space disposed at the inner ends of the inflow path and having an opening area greater than an opening area of the first opening and an opening area of the second opening; wherein the opening area of the center space is dimensioned such that a portion of the first wall facing the center space resonates in response to displacement of the diaphragm; and the first wall does not include any piezoelectric elements.