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1. (WO2007013287) VALVELESS MICROPUMP

Pub. No.:    WO/2007/013287    International Application No.:    PCT/JP2006/313691
Publication Date: Fri Feb 02 00:59:59 CET 2007 International Filing Date: Tue Jul 11 01:59:59 CEST 2006
IPC: F04B 43/04
B81B 3/00
F04B 43/02
Applicants: Kyushu Institute of Technology
国立大学法人 九州工業大学
MIYAZAKI, Koji
宮崎 康次
TANAKA, Seiichi
田中 誠一
SHIMOOKA, Hiroyuki
下岡 弘幸
TSUKAMOTO, Hiroshi
塚本 寛
Inventors: MIYAZAKI, Koji
宮崎 康次
TANAKA, Seiichi
田中 誠一
SHIMOOKA, Hiroyuki
下岡 弘幸
TSUKAMOTO, Hiroshi
塚本 寛
Title: VALVELESS MICROPUMP
Abstract:
A valveless micropump for transforming a pressure variation of fluid in a volume variation chamber (8) into an oscillatory flow of fluid (10) by means of a piezoelectric element (7), making the fluid (10) to flow smoothly in channels (5, 6). A channel (2) is formed as an asymmetric diffuser-shaped channel (12) having a narrow channel (5) on the diffuser inlet (3) side and a wide channel (6) on the diffuser outlet (4) side, and the volume variation chamber (8) provided with the piezoelectric element (7) is communicated with the narrow channel (5). Vibration generated by applying a voltage to the piezoelectric element (7) causes a pressure variation of the fluid in the volume variation chamber (8) to generate a nozzle flow. The fluid (10) is made to flow smoothly from the wide channel (6) to the narrow channel (5) by the nozzle flow.