A test method for a device that simulates the characteristics of indoor dust flying and settling
A test method, dust technology, applied in measurement devices, particle and sedimentation analysis, particle size analysis, etc., can solve problems such as few test studies, health hazards of experimenters, and difficulty in measuring scattered sedimentation characteristics.
Inactive Publication Date: 2015-10-28
DALIAN UNIV OF TECH
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Problems solved by technology
However, due to the complexity of dust components and particle size distribution, as well as the hazards to the health of experimenters, it is difficult to measure the characteristics of its flyaway and sedimentation. At present, there are few test studies in this area.
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[0018] figure 1 The working principle diagram of the airtight experimental environment cabin and testing equipment is shown. In the figure, the device for simulating the characteristics of indoor dust scattering and settling includes a closed experimental environment chamber 1, a simulated powder body 2, a detector 3 for distinguishing biological and non-biological particles, a volumetric bottle 4 and a nitrogen tank 5. The nitrogen tank 5 is connected through a connecting pipe 6 Connected to the volumetric flask 4 placed in the airtight experimental environment chamber 1 where the simulated powder 2 has been placed, the detector 3 for distinguishing biological and non-biological particles is placed outside the airtight experimental environment chamber 1, and the detector for distinguishing biological and non-biological particles 3 of the laser transmitter and scattered light receiver into the airtight experimental environment cabin 1.
[0019] The specific conditions of the ...
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The invention provides a device and a testing method for simulating the indoor dust flying-off and settling property and belongs to the field of building environments. The device comprises a closed experiment environment cabin, vitamin B2 powder, a detector for distinguishing biological and non-biological particles, a volumetric flask and a nitrogen tank, wherein the vitamin B2 powder is placed into the volumetric flask in the closed experiment environment cabin, and is blown into the volumetric flask by nitrogen in the nitrogen tank to carry out dust particle distribution in the closed experiment environment cabin; the detector for distinguishing the biological and non-biological particles is used for carrying out laser irradiation on dust particles; the size of the particles is measured by the intensity of scattered light emitted when the particles are irradiated by laser. According to the simulating device and the testing method thereof, research on the flying-off and settling property of simulated powder replacing the indoor dust is performed; the detection device distinguishing the biological and non-biological particles is selected on the basis; the testing method for simulating the indoor dust flying-off and setting property is developed and technical supports are provided for an indoor dust pollution measurement and control technology.
Description
technical field [0001] The invention relates to a device and a testing method for simulating the scattering and settling characteristics of indoor dust, which belong to the field of building environmental pollution testing and control. Background technique [0002] In modern society, people spend most of their time indoors, so the indoor air environment is particularly important. After 5 years of investigation by the U.S. Environmental Protection Agency, it was found that the air pollution level in residential buildings and public buildings is very high, which is several to dozens of times that of outdoor air pollution, and the problem of indoor air quality in my country is more serious than that in developed countries. Indoor dust is an important carrier of microorganisms in the air. When the dust carries pathogenic microorganisms, it can cause transmission through the air. For example, Mycobacterium tuberculosis was isolated from dust in tuberculosis hospitals, and hepati...
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IPC IPC(8): G01N15/02
Inventor 吕阳付柏淋
Owner DALIAN UNIV OF TECH