In the field of air purification, the filtration efficiency of High Efficiency Air Filter for particles of different particle sizes is a key indicator to measure its performance. This research plays a crucial role in understanding and optimizing air filtration effects.
First of all, the characteristics of particles of different particle sizes have a significant impact on filtration efficiency. Particles with larger particle sizes (such as greater than 5 μm) have large inertia, and when the air flows through the filter, they are likely to hit the filter fiber due to inertia and be captured. In this case, the physical interception effect of High Efficiency Air Filter is more prominent. For example, when large-size particles such as dust and pollen pass through the filter, they are directly blocked by the fibers, and the filtration efficiency is relatively high. For particles with smaller particle sizes (such as less than 0.3μm), their Brownian motion is more intense. They move irregularly in the air, are more likely to come into contact with filter fibers, and have a certain probability of filtration. But at the same time, these small-sized particles are more likely to pass through the filter driven by the air flow, so it is relatively difficult to filter this part of the particles.
Secondly, the filtration mechanism of High Efficiency Air Filter varies depending on particle size. For particles in the medium size range (0.3 - 5μm), multiple mechanisms such as diffusion effects, interception effects and inertial effects work together. Among them, the diffusion effect allows small particles to have the opportunity to get close to the filter fiber under the impact of air molecules. The interception effect is when the particles move in the airflow and are close enough to the fiber surface and are captured. The inertial effect is exerted when the particles have a certain speed and mass. effect. The combined effect of these mechanisms determines the filtration efficiency for particles in this size range. Moreover, different filter materials and filter structures will have different effects on these mechanisms, resulting in differences in filtration efficiency for medium-sized particles.
Furthermore, experimental research methods are critical to accurately assess filtration efficiency. Commonly used methods include the aerosol test method, which generates aerosols with known particle size distribution and passes them through the High Efficiency Air Filter. Then, the concentration of particulate matter is measured before and after the filter, and the concentration difference is used to calculate the filtration efficiency. During the experiment, parameters such as aerosol particle size, concentration, and airflow velocity need to be strictly controlled to ensure the accuracy and repeatability of the experimental results. At the same time, in order to more fully understand the filtration effect of the filter on particles of different particle sizes, it is necessary to use aerosols of various particle sizes for testing, and to repeat the experiment under different operating conditions (such as different air flows).
Finally, studying the filtration efficiency of High Efficiency Air Filter for particles of different particle sizes is of great significance in practical applications. In environments with extremely high air quality requirements, such as hospital operating rooms and electronic chip manufacturing workshops, understanding the filter's ability to filter tiny particles can help you better select the appropriate filter to ensure the cleanliness of the environment. For the home environment, this helps people choose a High Efficiency Air Filter that can effectively remove pollutants in the air based on local air quality characteristics (such as the main particle size range of particulate matter in haze) to protect the health of residents.
