Patent ID: 8721303

Claim:
A piezoelectric micro-blower comprising: a blower body; a vibrating plate fixed at an outer peripheral portion thereof to the blower body and including a piezoelectric element; a blower chamber located between the blower body and the vibrating plate; a first wall portion of the blower body provided at a location facing the vibrating plate across the blower chamber to vibrate with vibrations of the vibrating plate; a first opening located in the first wall portion; a second wall portion located on an opposite side of the first wall portion with respect to the blower chamber; a second opening located in a portion of the second wall portion which faces the first opening; and an inflow passage located between the first wall portion and the second wall portion; wherein each of the first opening and the second opening includes a plurality of holes, and each hole of the first opening and each hole of the second opening are located at positions facing each other; and an area inside of each of the plurality of holes of the first opening and an area inside of each of the plurality of holes of the second opening at least partially overlap each other, when viewed in a direction from the second wall portion towards the first wall portion.