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Study on the Test System for Measuring the Filtration Efficiency of Air Cleaner

Author: WangZhiQiang
Tutor: LiuJunJie
School: Tianjin University
Course: Heating, Gas Supply , Ventilation and Air Conditioning Engineering
Keywords: Air Filter Weight efficiency Average counting efficiency of the whole life Most vulnerable through particle size Filter performance testing
CLC: TK403
Type: Master's thesis
Year: 2007
Downloads: 214
Quote: 2
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Abstract

The air cleaner has been widely used in internal combustion engines, the gas turbine and the compressed air the device intake system, for the dust and impurities contained in the filtered air into the power equipment. This paper analyzes the limitations of measuring the efficiency of the air cleaner filter weight, and describes the benefits of using sub-particle size counting method to measure the efficiency of the air cleaner. Weight efficiency and counting efficiency of the sub-particle size combined test method to measure the filtration efficiency of the air filter, you can get a comprehensive and objective understanding of their filtering performance. Therefore, the subject of Yi in the test bed developed by a weight and sub particle size counting method of combining evaluation air cleaner filter performance. In the analysis and study of the country, on the basis of the inside and outside of the air cleaner filter performance testing standards, the draw weight efficiency is difficult to distinguish between the conclusion of the high-efficiency air filter. Typical mathematical models - single fiber model from filtration theory, analyzes the air cleaner filter performance factors; fiber diameter, the filtration rate and fiber fill rate by calculating the quantitative analysis of filtration efficiency of the single-fiber model the influence derived most easily through the air cleaner particle size of about 0.4μm conclusions, it is necessary to obtain the counting efficiency of the air cleaner for 0.4μm particles by using the particle counting method. Based on this view, the subject is presented with reference to the general ventilation air filter the counting efficiency test method using weight, count method to test the air cleaner filter efficiency, and this proposal is to build a set of \counting efficiency combined test system can test the efficiency of the air filter in the dust-loaded count, in order to understand the average counting efficiency of the whole life of the air filter. Developed air cleaner filter performance testing system is a set of computer core, high degree of automation, air filter performance data acquisition and analysis system, use applications written in Visual Basic 6.0 language, easy to operate, the user can need to select the initial count of the test air filter efficiency, or choose to test the full life of the average counting efficiency. In addition, the accuracy and measurement error of the experimental station analyzed. Build good laboratory bench comparative experiments, for example, the relationship between resistance and filtration rate of filtration efficiency and filtration rate relationship, at the same time, also carried out air filter efficiency in capacity dust experiment, the experimental results for the filter theoretical research capacity dust has certain reference value. Proven, the detection system and the test results are in line with the filter testing requirements. Completion of the detection system for a domestic cleaner manufacturer provides a powerful tool to ensure the quality of their products, and guidance on the design and manufacture of the air filter performance testing system. .

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