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Airborne fast ice core activation counter

A counter and ice nucleus technology, which is applied in the field of airborne fast ice nucleus activation counter, can solve the problems of small sample size and limited use, and achieve the effect of measuring ice crystal spectrum distribution, short measurement period, and resolving solid ice crystals

Pending Publication Date: 2019-10-25
CHENGDU UNIV OF INFORMATION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2001, the airborne observation of the tropospheric ice core by the CFDC device over the Arctic Ocean was reported for the first time, but the CFDC device has the following limitations: (1) Human intervention is required to freeze the chamber wall, which is at best a semi-automatic process, limiting their use in continuous monitoring applications; (2) due to frost on the cold walls, they must be re-frozen after a few hours; (3) the work requires laminar flow conditions, resulting in relatively small sample sizes (1~2L / min)

Method used

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  • Airborne fast ice core activation counter
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  • Airborne fast ice core activation counter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Please refer to the attached figure 1 - attached image 3Shown, a kind of airborne fast ice nucleation activation counter comprises chamber 17, refrigeration device 18, sampling device 19, closed circulation air flow device 20 and laser ion phase state detection counter 21, and chamber (17) is made of copper Hollow cylinder structure, sampling device 19 comprises first dummy impactor 1901, the inlet end of first dummy impactor 1901 is connected with the gas outlet end of first valve 1902 and first HEPA filter 1903 respectively through pipeline; The first HEPA The inlet end of the filter 1903 is connected with the outlet end of the second valve 1904, the inlet ends of the first valve 1902 and the second valve 1904 are connected with the inlet pipeline; The countercurrent drier 1905 is connected to the first refrigerator 1906, and the first refrigerator 1906 is connected to the top of the chamber 17 through a refrigeration pipe; the refrigeration device 18 includes a com...

Embodiment 2

[0038] Please refer to Figure-1 and Figure-2, the closed circulation air flow device 20 divides the gas to be entered into the chamber 17 into two paths, one path is filtered and dried to form dry and cold air, and the other path is filtered and humidified to form warm and humid air , respectively monitor the humidity of the dry and cold air and the warm and humid air through the temperature and humidity sensor 2008 and the first temperature sensor 2010, and control the ratio of the two according to the required temperature and humidity of the air in the chamber 17.

[0039] The closed cycle air flow device 20 consists of a first mass flow controller 2004, a second mass flow sensor 2005, a third mass flow sensor 2006, a first dryer 2003, a second dryer 2013, a second HEPA filter 2002, a third HEPA filter 2014, fourth pressure sensor 2011, permeation humidification tube 2007, first temperature sensor 2010, second temperature sensor 2012, first refrigerator 2009 and vacuum pump 2...

Embodiment 3

[0042] Please refer to the attached figure 1 As shown in Figure-2, the sampling device is composed of a first virtual impactor 1901, a countercurrent dryer 1905, a first HEPA filter 1903, a first valve 1902, a second valve 1904, and a first refrigerator 1906. The first The virtual impactor 1901 has a cutting particle size of 1.3 μm, the countercurrent dryer 1905 filters out water vapor to avoid frosting at the inlet, and the first refrigerator 1906 pre-cools the sampled airflow to the temperature required for the experiment before it enters the chamber 17. The temperature is the same as that of the dry cold air stream. Switching the valve allows the air flow to pass through the first HEPA filter 1903 to obtain a clean air flow for system testing before formal work. The first HEPA filter 1903 adopts the product of TSI Company, and the countercurrent dryer 1905 adopts the PD-100T dryer made of Nafion material of Permapure Company of the United States. The dryer made of this ma...

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Abstract

The invention discloses an airborne rapid ice core activation counter which comprises a chamber, a refrigeration device, a sample introduction device, a closed circulation gas flow device and a laserion phase detection counter. The sample introduction device is arranged in a sample introduction control box, the closed circulation gas flow device is arranged in an airflow control box, the sample introduction control box, the airflow control box, the laser ion phase detection counter and the chamber are arranged at an upper left of a rear part of a rack, and the front part of the rack is provided with a refrigeration device, a power supply box and a computer control box from the bottom to top. The airborne rapid ice core activation counter is a miniaturized fast ice core activation countersuitable for airborne observation, the process from ice core generation to activation in an actual operation can be simulated, and the airborne rapid ice core activation counter has the advantages oflarge flow rate, short measurement period, the distinction of solid ice crystals, the measurement of ice crystal spectrum distribution, and ice crystal imaging.

Description

technical field [0001] The invention relates to the field of body ice nucleus activation, in particular to an airborne fast ice nucleus activation counter. Background technique [0002] Atmospheric ice nuclei are solid particles in the atmosphere that can cause the condensation of water vapor or promote the freezing of supercooled water droplets to form ice crystals. In addition to homogeneous freezing nucleation, heterogeneous atmospheric ice nuclei form ice crystals in nature through four activation methods: desublimation, condensation-freezing, infiltration freezing, and contact freezing, which play a role in stimulating the transformation of supercooled water into ice crystals in cold cloud precipitation. effect. In mid-latitude regions, there are ice crystals in the negative temperature region in the cloud, and the conditions for these ice crystals to grow further are indispensable conditions for the formation of precipitation. Therefore, the observation and analysis ...

Claims

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Application Information

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IPC IPC(8): G01N25/14G01N21/47
CPCG01N25/147G01N25/145G01N21/47G01N2021/4792
Inventor 伍波郭学良
Owner CHENGDU UNIV OF INFORMATION TECH
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