Fine-particle counter
    12.
    发明申请
    Fine-particle counter 审中-公开
    细颗粒计数器

    公开(公告)号:US20090031786A1

    公开(公告)日:2009-02-05

    申请号:US11989003

    申请日:2006-06-20

    IPC分类号: G01N15/06

    CPC分类号: G01N15/065

    摘要: The present invention provides a fine-particle counter with which the number density of nanometer-sized fine particles born in a gas phase, which is extremely low, can be accurately measured under wide-ranging pressure conditions from pressurized conditions to low-pressure conditions.After contact-mixing, in a mixer 3, saturated vapor of a high-boiling-point solvent produced in a saturator 2, a component of a condensed nucleus detector 1, with nanometer-sized fine gas-born particles, condensed droplets of the saturated vapor whose nuclii are the fine particles are produced in a condenser 4 by heterogeneous nucleation. The number of the condensed droplets per unit of time is then counted with an optical detector 5 and is output as a pulse signal, and a computer 19 computes the number density of the nanometer-sized fine particles born in the aerosol from this pulse signal, the gas flow rates controlled by the flow meters 6, 12 and 10, and the other data that are transmitted to the computer 19 via an interface 18. The internal space of the mixer 3 has a narrowest passage having a circular cross section, situated in the center between the lower end of the mixer from which the carrier gas enters and the upper end of the mixer from which the carrier gas exits, a truncated-cone-shaped part whose cross section is circular and whose diameter gradually decreases so that the diameter on the lower end side is greater than the diameter on the narrowest passage side, and a reverse-truncated-cone-shaped part whose cross section is circular and whose diameter gradually increases so that the diameter on the narrowest passage side is smaller than the diameter on the upper end side. An aerosol inlet communicating with the aerosol inlet tube 8 is positioned at the narrowest passage.

    摘要翻译: 本发明提供了一种微粒计数器,其可以在从加压条件到低压条件的宽范围的压力条件下精确地测量气相中出现的纳米级细颗粒的数量密度极低的微粒计数器。 接触混合后,在混合器3中,在饱和器2中产生的高沸点溶剂的饱和蒸气,浓缩核检测器1的成分,具有纳米尺寸的细小气体颗粒,饱和的 通过异相成核在冷凝器4中产生其氧化物为细颗粒的蒸气。 然后用光学检测器5对每单位时间的凝结液滴的数量进行计数,并作为脉冲信号输出,计算机19根据该脉冲信号计算出气溶胶中纳米级微粒的数密度, 由流量计6,12和10控制的气体流量以及经由界面18传送到计算机19的其他数据。混合器3的内部空间具有圆形横截面最窄的通道,位于 载气进入的混合器的下端和载气离开的混合器的上端之间的中心是截面为圆形并且其直径逐渐减小的截锥形部分,直径 在下端侧的直径大于最窄通道侧的直径,截面为圆形且直径逐渐增大的倒锥形部分,使得狭窄部的直径 t通道侧小于上端侧的直径。 与气溶胶入口管8连通的气溶胶入口位于最窄的通道处。

    Bubble separating apparatus
    13.
    发明授权
    Bubble separating apparatus 失效
    气泡分离装置

    公开(公告)号:US5510019A

    公开(公告)日:1996-04-23

    申请号:US280941

    申请日:1994-07-27

    摘要: A vortical flow type bubble separating apparatus comprises a container defining a substantially cone-shaped vortical flow chamber having a lower larger diameter end with a plurality of holes, an outer casing for receiving a liquid discharged from the vortical flow chamber through the holes, a center conduit pipe with a plurality of orifices for removing bubble containing fraction from the vortical flow chamber for discharging, an annular preliminary vortical flow passage extending at least approximately entire circumference of the larger diameter end portion of the container, a single opening defined through the peripheral wall of the vortical flow chamber and communicating the vortical flow chamber and the preliminary vortical flow passage, the opening being designed for introducing the liquid into the vortical flow chamber from the preliminary vortical flow passage in substantially tangential direction to the vortical flow chamber, and a flow guide member provided at the end of the preliminary vortical flow passage in the vicinity of the opening for guiding the liquid flow into the vortical flow chamber with little angular deflection.

    摘要翻译: 涡流式气泡分离装置包括限定基本上锥形的涡流流动室的容器,其具有具有多个孔的较小直径端部,用于接收通过孔从涡旋流动室排出的液体的外部壳体, 管道,其具有用于从涡旋流动室排出的含有气泡的部分用于排放的多个孔口,环形初级涡旋流动通道,其延伸至容器的较大直径端部的至少大致整个圆周;通过周壁限定的单个开口 的涡旋流动室并且连通涡流流动室和初步涡旋流动通道,该开口被设计成用于将液体从初级涡旋流动通道沿着与涡旋流动室基本切向的方向引入涡旋流动室, 在p的末尾提供的导向件 在开口附近的简化涡旋流动通道,用于将液体流引导到具有很小角度偏转的涡旋流动室中。