公开(公告)号：US06468330B1

公开(公告)日：2002-10-22

申请号：US09596222

申请日：2000-06-14

申请人： Patricia M. Irving ,  W. Lloyd Allen ,  Nathan D. Hindman ,  Trevor M. Moeller

发明人： Patricia M. Irving ,  W. Lloyd Allen ,  Nathan D. Hindman ,  Trevor M. Moeller

IPC分类号： B01D4512

CPC分类号： B04C9/00 ,  B01D17/00 ,  B01D17/0217 ,  B01D45/16 ,  B04C5/18 ,  B04C5/23 ,  B04C5/28 ,  B04C2009/005

摘要： The particle separation and collection assembly uses cyclonic forces to separate and remove large particles from an airstream and concentrate small particles for sensor/detector technology. This assembly utilizes multiple mini cyclones operating in parallel to reduce the size and velocity of air through the cyclone inlets while maintaining the same fluid or flow rate as compared to one large cyclone. The multiple cyclone system can be arranged in a radial geometry or in a bipolar or uni-polar longitudinal design. The particle separator and collection assembly uses a blower or vacuum pump to draw outside gas into the cyclone particle separator assembly through radial inlets. Vacuum transfer channels, extending the entire length of the assembly, pull gas into the top of the cyclone chambers and out through the bottom apex of cyclone chamber and through the top vortex finder. Gas entering the cyclone particle separation chambers from the inlet swirls downwardly through cyclone chambers due to the tangentially aligned inlet. The gas travels in a helical pattern downwardly toward the bottom of cyclone chambers. Some of the air carrying particles smaller than the cut reverses direction and leaves the cyclone through the top vortex finder. The rest of the air exits the cyclone at the bottom. The geometry of the cyclone determines particle “cut” size. Due to centrifugal forces, the particles larger than the “cut” size flow outwardly away from the center axis of the chambers and toward the walls of the respective chambers. Liquid is pumped into chamber from a liquid reservoir through the central liquid passage tube. This liquid wets the particles in chamber and washes down the chamber walls flushing the particles into the reservoir. The liquid is continuously recirculated through the conical chambers by the peristaltic pump thereby concentrating the particles within the liquid over time. The liquid then can be pumped to an optionally integrated monitoring system comprised of detectors and/or sensors. The monitoring system then can send out a warning if toxic microorganisms are present.

公开(公告)号：US6010554A

公开(公告)日：2000-01-04

申请号：US880355

申请日：1997-06-23

申请人： Joseph G. Birmingham ,  Patricia M. Irving ,  Yin-Fong Su ,  Charles J. Call ,  Bruce D. Lerner ,  Robert S. Wegeng

发明人： Joseph G. Birmingham ,  Patricia M. Irving ,  Yin-Fong Su ,  Charles J. Call ,  Bruce D. Lerner ,  Robert S. Wegeng

IPC分类号： B01D45/08 ,  B01D45/16 ,  G01N1/22 ,  G01N1/24

CPC分类号： B01D45/16 ,  B01D45/08 ,  G01N1/2208 ,  G01N1/24 ,  G01N2001/2223

摘要： A micro-machined virtual impactor device to permit the separation, collection and concentration of a significant portion of environmental particulates having a diameter of less than ten microns and its method of operation. The device includes a plurality of projections, each having a virtual impact surface that defines an aperture in a stagnant zone of fluid flow. A major portion of the particulate material is concentrated into a minor portion of the fluid which is processed through the aperture, where it is collected for subsequent analysis.

摘要翻译： 微加工的虚拟冲击器装置，其允许分离，收集和浓缩直径小于10微米的大部分环境微粒及其操作方法。 该装置包括多个突起，每个突起具有限定流体流动停滞区域中的孔的虚拟冲击表面。 颗粒材料的主要部分被集中到通过孔处理的流体的一小部分中，其中它被收集用于随后的分析。