Detailed analysis of air filter testing machine
With people paying more and more attention to the requirements of air quality, high-quality air environment has increasingly become the environment where people choose to live and shop, and air filtration and optimization equipment frequently appear in people's daily life. So, what about the air quality after filtration by air filter testing machine, the Qinsun Instruments Co., LTD will give you a brief analysis.
Test methods for air filter testing machine
1. weight method Arrestance
The test dust source is standard dust with large particle size and high concentration. The main component of the dust is the screened floating dust in the specified area, and then the specified amount of fine carbon black and short fiber is added. Most * require the use of "road dust" in ArizonaRoadDust area of the United States, the Chinese standard once stipulated the use of dust from a village on the Loess Plateau, and the Japanese standard stipulated the use of "Guandong Asia clay" originated in Japan. The measured "quantity" is the dust weight.
The air filter testing machine is installed in the standard test wind tunnel, and the windward end continuously emits dust. At regular intervals, measure the weight of dust passing through the filter or the amount of dust collected on the filter, thus obtaining the filtration efficiency of the filter calculated by the weight of dust at this stage. * The final weighing efficiency is the weighted average of the efficiency in each test stage according to the dust emission.
The termination conditions of the weight method test are: the agreed final resistance value, or when the efficiency drops obviously. The so-called "agreement" here refers to the agreement between the customer and the tester, or the tester's own regulations. Obviously, different conditions for termination of the test are agreed, and the weight efficiency value is different.
2. Colorimetry Dust-spot
Test bed and test dust are the same as those used in the weighing method. Dust "quantity" is the light transmission quantity of high-efficiency filter paper at sampling point.
When sampling before and after the filter, there is high-efficiency filter paper on the sampling head. Obviously, the pollution degree of high-efficiency filter paper at sampling points before and after the filter will be different. In the test, after every period of dust emission test, measure the light transmission quantity of high-efficiency filter paper at sampling points before and after the filter under the condition of no dust emission. By comparing the difference of light transmission quantity of filter paper, the so-called "filtering efficiency" can be obtained by the specified calculation method. * The final colorimetric efficiency is the weighted average of the efficiency values in each stage of the whole test process according to the dust emission.