US 7,553,135 B2 · Diaphragm air pump

Abstract

A diaphragm air pump comprises a pump chamber, a diaphragm and one or more piezoelectric beams or bimorphs. Fluid flows into the pump chamber and then flows out of it, the diaphragm is provided within the pump chamber, and one or more central openings are formed in the diaphragm. One or more central check valves are provided in the central openings. The diaphragm is just bonded with piezoelectric beams, not fixed to the lower housing of the pump chamber in order to get large displacement. With the provided diaphragm air pump, it is possible to actively adjust the air quantity according to the requirement for fuel cell or a part-to-be-cooled, and it is also possible to reduce noise and power consumption compared with a conventional fan type cooler or air pumps.

Claims15

Dependent claims

A diaphragm air pump comprising:

a pump chamber, wherein fluid flows into the pump chamber and then flows out of the pump chamber;
a diaphragm provided within the pump chamber, wherein the diaphragm comprises one or more central openings and one or more central check valves in the central openings;
and
one or more piezoelectric beams each connected to one side of the diaphragm, wherein electric power is applied to the piezoelectric beams and the fluid is supplied to a part-to-be-cooled as the piezoelectric beams vibrate;
wherein the diaphragm is connected to the pump chamber by the one or more piezoelectric beams.

2 more elements

Dependencies are inferred from the claim text.

Diaphragm air pump

Life of this patent

Diaphragm air pump

Life of this patent

Abstract

Claims15