Patent ID: 7066190
Filing Date: 2006-06-27
Classification: B01J,B01L,G01N,Y10T

Abstract:
1. An air-driven microfluid control device, which is applied for pulling and pushing a fluid inside a fluid tunnel, comprising: an air source, which provides an airflow; a first inlet, which connects to the air source for guiding the airflow; a narrow sector, which connects to the first inlet and connects from its side to the fluid tunnel; an outlet, which connects to the narrow sector so that the airflow from the first inlet goes through the narrow sector and leaves via the outlet; and a second inlet, which connects to the fluid tunnel so that the airflow from the second inlet enters the fluid tunnel to generate a pushing force; wherein a negative pressure lower than the external pressure is produced in the narrow sector to pull the fluid into the fluid tunnel when the first inlet provides an airflow while the second inlet is closed, and a positive pressure greater than the external pressure is produced in the narrow sector to push the fluid away from the fluid tunnel when the first inlet is closed while the second inlet provides an airflow.