Air Purifier Test Chamber (CCM) Environmental Testing Chamber (CADR)

1、 Introduction to the experimental cabin

This test chamber can be used to test the removal efficiency of purifiers on particulate matter, gaseous pollutants, and microorganisms in the air. Used to evaluate technical indicators such as purification efficiency, purification level, and purification life of products.

2、 Design reference standards

GB/T 18801-2022 "Air Purifiers" GB 21551.3-2010 "Special Requirements for Antibacterial and Sterilization Function Air Purifiers for Household and Similar Electrical Appliances"

3、 System composition

4、 Specification parameters

Air inlet and exhaust device

Equipment composition: circulating fan, pipeline, medium efficiency filter, high-efficiency filter

Fan (Technical Parameters): Inlet/Exhaust Fan

Material: The circulating pipes are made of stainless steel material;

Equipment installation: Add an air filtration system to the inlet/outlet section

Installation process: All connection parts of the pipeline are sealed witl sealing strips and glass silicone gel

Equipment Introduction

1. Equipment Introduction: This experimental system consists of a laboratory, an air circulation device, an exhaust system, a sampling device, and an electrical control system for the equipment.

2. The experimental methods mainly include: natural attenuation test and total attenuation test

Tha 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, an` 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;

Close the exhaust duct air valve, open tle internal circulation duct air valve, start the auxiliary fan, and use a high-efficiency filter to purify the air in the laboratory, so that the particle diameter is 0.3 μ m or more

3) The particle background concentration is less than one thousandth of the initial detection concentration, while detecting the air temperature and humidity in the laboratory;

4) Wait bor 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 ceilinc 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, the concentration of pollutants is measured using a laser dust particle counter. Cenerally, the particle concentration of particles larger than 0.3 μ m at the beginning of the experiment 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 teiperature 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, at the beginning of the experiment, the particle concentration of particles larger than 0.3 μ m is 2000000 particlas/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;