Piezoelectric blower

Abstract

Embodiments of the invention provide a piezoelectric blower, including a first diaphragm comprising a first piezoelectric element disposed at an outer surface thereof, a second diaphragm comprising a second piezoelectric element disposed at the outer surface thereof and disposed to be spaced, in parallel, apart from the first diaphragm, and a rim disposed along circumferences of an edge of the first diaphragm and an edge of the second diaphragm. The piezoelectric blower further includes a blower chamber defined by the first diaphragm, the second diaphragm, and the rim, and an opening through which air is sucked and discharged into and from a blower chamber.

What is claimed is: 
     
         1 . A piezoelectric blower, comprising:
 a first diaphragm comprising a first piezoelectric element disposed at an outer surface thereof;   a second diaphragm comprising a second piezoelectric element disposed at the outer surface thereof and disposed to be spaced, in parallel, apart from the first diaphragm;   a rim disposed along circumferences of an edge of the first diaphragm and an edge of the second diaphragm;   a blower chamber defined by the first diaphragm, the second diaphragm, and the rim; and   an opening through which air is sucked and discharged into and from a blower chamber.   
     
     
         2 . The piezoelectric blower according to  claim 1 , wherein the first piezoelectric element and the second piezoelectric element are disposed in an opposite direction to each other. 
     
     
         3 . The piezoelectric blower according to  claim 1 , wherein the first piezoelectric element is disposed at a central portion of the first diaphragm and the second piezoelectric element is disposed at a central portion of the second diaphragm. 
     
     
         4 . The piezoelectric blower according to  claim 1 , further comprising:
 an elastic member disposed between an inner surface of the first diaphragm and an inner surface of the second diaphragm.   
     
     
         5 . The piezoelectric blower according to  claim 4 , wherein the elastic member is interposed between a central portion of the inner surface of the first diaphragm and a central portion of the inner surface of the second diaphragm. 
     
     
         6 . The piezoelectric blower according to  claim 4 , wherein the elastic member is formed of a coil spring. 
     
     
         7 . The piezoelectric blower according to  claim 1 , wherein the opening is formed between the edge of the first diaphragm and the edge of the second diaphragm. 
     
     
         8 . The piezoelectric blower according to  claim 1 , wherein the opening is formed on the rim. 
     
     
         9 . The piezoelectric blower according to  claim 1 , wherein the rim comprises a C-letter sectional shape. 
     
     
         10 . The piezoelectric blower according to  claim 1 , wherein the rim is made of an elastic material.