Patent ID: 7896621

Claim:
A micro pump comprising: a pump chamber comprising inflow and outflow passages through which a drive fluid flows; a first valve chamber to which a vertical type Peltier device is directly attached, and the first valve chamber is selectively contracted or expanded so as to open or close the inflow passage; a second valve chamber selectively contracted or expanded so as to open or close the outflow passage; and a horizontal type thermoelectric module configured to selectively directly heat and cool the pump chamber and the second valve chamber, wherein the inflow passage is disposed between the pump chamber and the first valve chamber, the outflow passage is disposed between the pump chamber and the second valve chamber, the pump chamber forms an undivided expanding and condensing space between the inflow passage and the outflow passage, and the horizontal type thermoelectric module comprises: a first plate attached directly to the pump chamber; a second plate attached directly to the second valve chamber; and a plurality of semiconductors interposed between the first and second plates and electrically connected to one another.