Patent ID: 7178380
Filing Date: 2007-02-20
Classification: B01D,G01N

Abstract:
1. A virtual impactor device comprising an acceleration nozzle and a separation zone both aligned about a linear axis which defines a principal direction of aerosol flow through the device from the acceleration nozzle through the separation zone, the acceleration nozzle having a fluid inlet and a substantially narrower fluid outlet, and the separation zone includes an inlet from the acceleration nozzle, a minor flow outlet downstream from the acceleration nozzle and oriented substantially along the linear axis; and at least one major flow outlet downstream from the acceleration nozzle and oriented at an angle to the linear axis, the minor flow outlet and the major flow outlet meeting at a juncture, and a fluid injection port proximate to the juncture of the major flow outlet and the minor flow outlet adapted to inject a fluid into the separation zone.