QBT5364 Air Purifier Test Chamber

Equipment Introduction

1. Equipment Introduction

This experimental system includes a laboratory, an air circulation device, an exhaust system, and a sampling device for adding samples

Composition of equipment and electrical control system.

2. Test method

This experiment is mainly divided into: natural attenuation test and total attenuation test

The natural attenuation test is as follows:

1) Place the air purifier to be tested on the test bench in the middle of the laboratory (except for vertical air purifiers), adjust the air purifier to the working state, check if it is running normally, and then turn off the air purifier;

2) Arrange the sampling points in a position that avoids the air inlet and outlet, with a distance of 0.5m from the wall and a relative height of 0.5-1.5m above the laboratory floor. One or more sampling heads can be installed at the same sampling point and connected to external sampling tubes;

3) Close the exhaust duct air valve, open the internal circulation duct air valve, start the auxiliary fan, use a high-efficiency filter to purify the air in the laboratory, and make the particle diameter 0.3MThe background concentration of particles above m is less than one thousandth of the initial detection concentration, and the air temperature and humidity in the laboratory are also measured;

4) Wait for the background concentration of particulate matter to decrease to an appropriate level, record the current background concentration of particulate matter, turn off the circulating fan and high-efficiency filter, start the household ceiling fan, and use the sampling device to place the smoke pollutant in the laboratory and allow it to enter the air vortex generated by the ceiling fan stirring. Stir for 10 minutes, and then turn off the household ceiling fan after the pollutants are mixed evenly;

5) After the ceiling fan is completely stopped, use a laser dust particle counter to measure the concentration of pollutants. Generally, at the beginning of the test, the concentration is 0.3MThe particle concentration of particles above m is 2000000 particles/L

Left and right, the value of the test point is used as the initial concentration in the laboratory;

6) After the initial concentration is determined, the detection experiment begins. During the detection experiment, the pollutant concentration is collected together for 2 minutes, and the measurement is carried out for 20 minutes. It is required that at least 9 data points have a concentration greater than twice the lower limit of the instrument measurement;

7) Record the laboratory temperature and humidity during the experiment;

8) Based on the measured data, the natural attenuation constant Kn can be calculated;

Total attenuation test

1) Conduct the test according to the provisions of (1-4) above;

2) After the household ceiling fan is completely stopped, the concentration of pollutants is measured using a laser dust particle counter. Generally, the test starts at 0.3MThe particle concentration of particles above m is 2000000 particles/L

Left and right, the value of the test point is used as the initial concentration in the laboratory;

3) After the initial concentration is determined, turn on the air purifier to begin the detection test. During the detection process, the concentration of pollutants is measured every 2 minutes and continuously for 20 minutes. At least 9 data points are required to have a concentration greater than twice the lower limit of the instrument measurement;

4) Turn off the air purifier and record the laboratory temperature and humidity during the experiment;

5) Based on the measured data, the total attenuation constant Ke can be calculated;