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    • 6. 发明授权
    • Integrated collection and vaporization particle chemistry monitoring
    • 综合收集和蒸发颗粒化学监测
    • US5983732A
    • 1999-11-16
    • US44854
    • 1998-03-20
    • Susanne V. HeringMark R. Stolzenburg
    • Susanne V. HeringMark R. Stolzenburg
    • G01N1/02G01N1/00G01N1/22G01N1/24G01N1/28G01N15/00G01N21/76G01N30/12G01N33/00
    • G01N1/2214G01N15/00G01N33/0016G01N1/2202G01N1/2208G01N1/24G01N2001/2223G01N2015/0046G01N2030/128
    • An integrated collection and vaporization cell apparatus has a collector and vaporizer cell for collecting airborne particles from sample gas on a collector strip in the cell and a power source connected to the strip for rapidly heating the strip and converting the particles to vapors for analysis without need of removing the strip from the cell. A sample gas director connected to the cell directs sample gas and particles to the collector strip. Particles are collected on the strip by impaction. Rapid heating of the strip vaporizes the particles. A carrier gas flowed into the cell through the director and directly into the cell through a port directs the vapors from the cell to an analyzer port. A measurer connected to the analyzer port measures the amount of vapors and elemental constituents obtained from vaporization of the particles. A humidifier is provided to increase particle collection efficiency. A pre-impactor and denuder are provided to remove large particles and compounds from the sample gas before analysis. A vented housing around the pre-impactor, denuder, humidifier and cell maintains sample gas temperature near ambient temperature. The sample conduit is free of valves.
    • 集成收集和蒸发池装置具有收集器和蒸发器单元,用于从单元中的收集器条上的样品气体收集空气中的颗粒,以及连接到条带的电源,用于快速加热条带并将颗粒转化成蒸气以进行分析,而不需要 从细胞中移除条带。 连接到电池的样品气体导向器将样品气体和颗粒引导到收集器条。 颗粒通过冲击收集在带上。 带的快速加热使颗粒蒸发。 通过引导器流入电池的载气通过端口直接进入电池,将蒸气从电池引导到分析器端口。 连接到分析器端口的测量器测量从颗粒蒸发获得的蒸气和元素成分的量。 提供加湿器以增加颗粒收集效率。 提供预冲击器和剥蚀器,以在分析前从样品气体中除去大颗粒和化合物。 预冲击器,分解器,加湿器和电池周围的通风外​​壳保持接近环境温度的样品气体温度。 样品导管没有阀门。
    • 7. 发明授权
    • Particle microtrap screen
    • 粒子微量捕捉屏幕
    • US06284025B1
    • 2001-09-04
    • US09412441
    • 1999-10-05
    • Nathan KreisbergSusanne V. Hering
    • Nathan KreisbergSusanne V. Hering
    • B01D4508
    • G01N1/2208B01D45/08G01N2001/2223Y10S55/14
    • A particle microtrap screen apparatus has an inlet, a jet orifice screen with multiple microjet orifices, and a microtrap plate having multiple microtraps spaced opposite the multiple microjet orifices for entrapping particles entrained by the jets and then released by the gas, and impacting in the microtraps with the energy imparted by the gas as the gas turns and flows between the jet orifice screen and the microtrap impact plate. Collection efficiencies of greater than 90% of particles, about 2 micrometers or larger in size, are experienced with pressure drops of less than 5 millimeters of water. The pressure drop does not increase upon increased loading with particles. The jet orifices have widths of D, about 0.5 millimeters, with spacing between orifices of about 5D and trap width and depth of about 4D and 2D, respectively, with about 2D spacing between the jet orifice screen and the microtrap plate. Ultraviolet lamps in a plenum on the inlet side of the jet orifice screen illuminate the particle traps through the jet orifices for sterilizing microorganisms within the particle traps. The jet orifices are circular or rectangular orifices.
    • 颗粒微量筛网装置具有入口,具有多个微喷嘴的喷射孔筛,以及具有与多个微喷孔相对隔开的多个微捕集器的微捕集板,用于捕获由喷射器夹带的颗粒,然后由气体释放,并在微捕集器 当气体转动时,由气体施加的能量在喷射孔筛和微量捕捉板冲击板之间流动。 在小于5毫米水的压力下,经历大于90%的颗粒,约2微米或更大尺寸的收集效率。 当颗粒的负载增加时,压降不会增加。 射流孔的宽度大约为0.5毫米,孔间距约为5D,陷阱宽度和深度分别约为4D和2D,喷射孔筛与微量捕捉板之间的间隔约为2D。 在喷射孔屏幕入口侧的增压室中的紫外线灯通过喷射孔照射颗粒捕集器,用于对颗粒捕集器内的微生物进行灭菌。 喷气孔是圆形或矩形孔。