Title:
Blois
Document Type and Number:
Japanese Patent JP6237877
Kind Code:
B2
Abstract:
A piezoelectric blower includes a valve, a housing, a vibrating plate, and a piezoelectric element. The vibrating plate forms, together with the housing, a column-shaped blower chamber such that the blower chamber is interposed therebetween in a thickness direction of the vibrating plate. The vibrating plate and the housing are formed such that the blower chamber has a radius (a). The piezoelectric element causes the vibrating plate to undergo concentric bending vibration at a resonance frequency (f). The radius (a) of the blower chamber and the resonance frequency (f) of the vibrating plate satisfy a relationship of 0.8×(k0c)/(2π)≤af≤1.2×(k0c)/(2π), where an acoustic velocity of gas that passes through the blower chamber is (c) and a value that satisfies a relationship of a Bessel function of a first kind of J0(k0)=0 is k0.
Inventors:
Shin Tanaka
Application Number:
JP2016504024A
Publication Date:
November 29, 2017
Filing Date:
February 05, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
F04B45/047
Domestic Patent References:
| JP2012528980A | ||||
| JP2008180161A | ||||
| JP2013100746A | ||||
| JP2008537057A |
Foreign References:
| US20130236338 |
Attorney, Agent or Firm:
Kaede International Patent Office
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