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Air Filter Manufacturer: What Materials Are Used in Air Filters, and How Should You Choose?
Release Date:
2022-03-13
The primary function of an air purifier is to filter out various airborne pollutants and pathogens, thereby providing people with a healthy breathing environment. When purchasing an air purifier, consumers focus on its purification performance.
The primary function of an air purifier is to filter out various airborne pollutants and pathogens, thereby providing people with a healthy breathing environment. When purchasing an air purifier, consumers focus on its purification performance.
However, due to differences in the air filters and filtration technologies employed, the manufacturing processes for air purifiers can vary significantly. Generally, air purifiers can be classified into purely physical purifiers and non-physical purifiers based on the operating principles of their air filters. A purely physical purifier is one that relies entirely on no filters such as HEPA or activated carbon to remove airborne pollutants; instead, it uses materials like negative-ion filters, photocatalytic filters, and electrostatic dust-collection filters to release purification and sterilization agents into the surrounding air, thereby achieving air purification. In contrast, non-physical purifiers operate on the principle of releasing purification and sterilization factors into the ambient air through filters such as negative-ion filters, photocatalytic filters, and electrostatic dust-collection filters, thus achieving air purification.
Negative-ion filter: A negative-ion air filter uses the negative ions it generates to purify mold, remove dust and odors, and improve the indoor environment. At its core is the negative ion, which leverages its dust-collecting, antibacterial, and detoxifying properties to enhance indoor air quality; however, this approach can result in incomplete purification and a higher risk of secondary pollution.
Photocatalytic filter: This filter effectively degrades toxic and harmful substances, kills a wide range of bacteria, and also offers odor removal and anti-fouling functions. However, ultraviolet light is the activation source for the photocatalytic air filter; therefore, no one should be present in the room while this type of air purifier is operating.
Electrostatic dust-collection filter: This is a convenient, maintenance-free air-filter consumable that comes at a high price. However, if the filter becomes excessively clogged with dust or its electrostatic dust-collection efficiency declines, it can easily cause secondary pollution in the surrounding space.
Activated carbon filter: effectively removes odors and dust without causing secondary pollution; however, once the adsorption capacity is saturated, the filter must be replaced, with a typical service life of about 3–4 months. Of course, some brands use higher-quality activated carbon, which can improve its efficiency and extend its effective lifespan.
HEPA filter: a higher-efficiency filtration medium that can capture 94% of particles larger than 0.3 microns in the air. However, it has relatively high consumable costs, requires a fan to drive airflow, and tends to generate significant noise. Its main limitation is that it cannot effectively filter inhalable particulate matter with diameters smaller than 3 microns.
When selecting air filters, combining filters made from different materials can leverage the strengths of each to achieve superior filtration performance compared with using a single type of filter.
Keywords:
Air filter, filter
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