Condensation-evaporator nanoparticle charger
    13.
    发明授权
    Condensation-evaporator nanoparticle charger 有权
    冷凝 - 蒸发器纳米颗粒充电器

    公开(公告)号:US09579662B2

    公开(公告)日:2017-02-28

    申请号:US14043662

    申请日:2013-10-01

    Abstract: A particle charging method and apparatus are provided. An ion source is applied to a particle laden flow. The flow is introduced into a container in a laminar manner. The container has at least a first section, a second section and a third section. The first section includes wetted walls at a first temperature. A second section adjacent to the first section has wetted walls at a second temperature T2 greater than the first temperature T1. A third section adjacent to the second section has dry walls provided at a temperature T3 equal to or greater than T2. Additional water removal and temperature conditioning sections may be provided.

    Abstract translation: 提供了一种粒子充电方法和装置。 将离子源施加到载满颗粒的流。 将流体以层流方式引入容器中。 容器至少具有第一部分,第二部分和第三部分。 第一部分包括第一温度下的湿壁。 与第一部分相邻的第二部分具有大于第一温度T1的第二温度T2的湿壁。 与第二部分相邻的第三部分具有设置在等于或大于T2的温度T3的干壁。 可以提供额外的除水和温度调节部分。

    Pulsed condensation particle counter

    公开(公告)号:US12105002B2

    公开(公告)日:2024-10-01

    申请号:US17492955

    申请日:2021-10-04

    CPC classification number: G01N15/065 G01N15/06 G01N15/075

    Abstract: A method and apparatus to create water vapor supersaturation and particulate counts from an air sample. The method and apparatus include introducing an air sample into a chamber by passing a flow into the chamber through the inlet by pumping at the outlet. The method further includes closing the inlet while continuing the pumping to exhaust the air sample from the chamber through the outlet. The pumping is performed at a rate operable to reduce pressure inside the chamber such that the air sample in the central portion of the chamber cools, and water vapor from walls of the chamber has time to diffuse into the air sample in the chamber from the walls. The cycles are repeated by continuously repeating the introducing and closing. The walls of the chamber may be wet or dry.

    PULSED CONDENSATION PARTICLE COUNTER

    公开(公告)号:US20220026332A1

    公开(公告)日:2022-01-27

    申请号:US17492955

    申请日:2021-10-04

    Abstract: A method and apparatus to create water vapor supersaturation and particulate counts from an air sample. The method and apparatus include introducing an air sample into a chamber by passing a flow into the chamber through the inlet by pumping at the outlet. The method further includes closing the inlet while continuing the pumping to exhaust the air sample from the chamber through the outlet. The pumping is performed at a rate operable to reduce pressure inside the chamber such that the air sample in the central portion of the chamber cools, and water vapor from walls of the chamber has time to diffuse into the air sample in the chamber from the walls. The cycles are repeated by continuously repeating the introducing and closing. The walls of the chamber may be wet or dry.

    Apparatus for sustained super-saturations for condensational growth of particles

    公开(公告)号:US10882018B2

    公开(公告)日:2021-01-05

    申请号:US16372677

    申请日:2019-04-02

    Abstract: An apparatus and method for creating enlarged particles in a flow. The apparatus includes a coiled tube having a tube diameter and a coil diameter, the tube having an input receiving the flow and an output, the tube having a length between the input and the output. A heater heats a first portion of the tube along a first, longitudinal portion of the tube, and a cooler cools a second, longitudinal portion of the tube along at least a second portion of the tube. The method includes heating a first portion of the tube along a first longitudinal portion of the tube, and simultaneously cooling a second portion of the tube along at least a second longitudinal portion of the tube. While heating and cooling, the method includes introducing a flow into an interior of the tube at an input, the flow moving the output.

    COILED SYSTEM FOR CONDENSATIONAL GROWTH OF ULTRAFINE PARTICLES

    公开(公告)号:US20190226968A1

    公开(公告)日:2019-07-25

    申请号:US16372643

    申请日:2019-04-02

    Abstract: An apparatus and method for condensationally enlarging particles in a flow of air or other gas. The apparatus includes a coiled tube having a tube diameter and a coil diameter, the tube having an input receiving the flow and an output, the tube having a length between the input and the output. The walls of the tube are wetted with a condensing fluid. The walls of the first portion of the coiled tube are held a temperature that is lower than the highest temperature in the second portion of the tube. The tube may have a third vapor recovery portion with wall temperature lower than the highest temperature in the second portion, and which optionally may not be coiled. While heating and cooling, the method includes introducing a flow into an interior of the tube at an input, the flow moving the output.

    Sustained super-saturations for condensational growth of particles

    公开(公告)号:US10252237B2

    公开(公告)日:2019-04-09

    申请号:US14886661

    申请日:2015-10-19

    Abstract: An apparatus and method for creating enlarged particles in a flow. The apparatus includes a coiled tube having a tube diameter and a coil diameter, the tube having an input receiving the flow and an output, the tube having a length between the input and the output. A heater heats a first portion of the tube along a first, longitudinal portion of the tube, and a cooler cools a second, longitudinal portion of the tube along at least a second portion of the tube. The method includes heating a first portion of the tube along a first longitudinal portion of the tube, and simultaneously cooling a second portion of the tube along at least a second longitudinal portion of the tube. While heating and cooling, the method includes introducing a flow into an interior of the tube at an input, the flow moving the output.

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