Experiment cabin for preparing standard air samples
A technology of standard gas and experimental chamber, which is applied in the field of experimental chambers for making standard gas samples, and can solve problems such as measurement result errors
Inactive Publication Date: 2012-07-25
华测计量检测有限公司
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Problems solved by technology
[0007] The particle cutter is used to separate dust particles with a diameter within a specific value range. For example, the PM2.5 cutter is used to separate particles with a diameter less than or equal to 2.5 microns. The cutter must be calibrated before use. The current PM2. The test method of 5 is to calculate the result by measuring the flow rate and the size of the cutter, and using mathematical formula conversion, so there will be a large error in the measurement result
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[0027] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements. As mentioned above, such as Figure 1-3 As shown, the experimental chamber 40 for making standard gas samples provided by the present invention is used to calibrate the particle cutter, which is used to separate the particles in the air, and includes: a gas source 10, a gas delivery pipe 20, a control system 30 and a main The cabin body 41, the air source 10 communicates with the main cabin body 41 through the gas delivery pipe 20, and the control system 30 includes a controller 31, a first flow controller 32, a temperature controller 33 and a humidity controller 34 , the first flow controller 32, the temperature controller 33 and the humidity controller 34 are all electrically connected to the controller 31, and the upper end surface of the main cabin body 41 is provided with a feed port 44 for particulate matter to enter ...
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Abstract
The invention discloses an experiment cabin for preparing standard air samples, which is used for mixing particulate matters with clean air to form the standard air samples with exact concentrations. The experiment cabin comprises an air source, air pipes, a main cabin body, a first blowing device and a second blowing device, wherein the air source is communicated with the main cabin body by the air pipes; feeding holes for the particulate matters to enter are arranged on the upper end face of the main cabin body; air inlet nozzles communicated with the main cabin body are arranged on the side walls of the main cabin body; the first blowing device is communicated with the main cabin body by the feeding holes and blows the particulate matters into the main cabin body; and the second blowing device is communicated with the main cabin body by the air inlet nozzles and blows air into the main cabin body so that the particulate matters are mixed with the air provided by the air source in the main cabin body to form the standard air samples with exact concentrations for a cutter to be calibrated to sample. The experiment cabin has high precision and high performance.
Description
technical field [0001] The invention relates to the field of particle cutters, in particular to a high-precision, high-efficiency experimental chamber for making standard gas samples. Background technique [0002] With the continuous development of industry, the living environment of human beings has been destroyed, and the air pollution situation is severe, and the suspended particles in the air can cause haze weather. [0003] Meteorologists and medical experts believe that hazy weather caused by fine particles is even more harmful to human health than sandstorms. Particles with a particle size of 10 microns or more will be kept out of the human nose; particles with a particle size between 2.5 microns and 10 microns can enter the upper respiratory tract, but some of them can be excreted through sputum, etc. The internal fluff blocks it, which is relatively less harmful to human health; and the fine particles with a particle size below 2.5 microns, whose diameter is equiva...
Claims
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IPC IPC(8): G01N1/28
Inventor 李波刘正辉刘文静郭冰朱平
Owner 华测计量检测有限公司