Plasma purifiers are products that improve air cleanliness and are mainly divided into household, commercial, industrial and building types.
The plasma in the plasma purifier is a kind of aggregated matter. It is different from the three states of matter of “solid”, “liquid” and “gas” in common sense. It is the fourth state of matter. When the electrons it possesses collide with molecules in the air, a series of elementary physical and chemical reactions will occur, and in the process of the reaction, a variety of active free radicals and ecological oxygen will be produced, that is, atomic oxygen produced by the decomposition of ozone.
The principle of plasma purifier to remove pollutants:
Under the influence of an external electric field, a large number of energetic electrons generated by dielectric discharge bombard pollutant molecules, ionizing, dissociating, and exciting them. This then triggers a series of complex physical and chemical reactions, transforming complex macromolecular pollutants into simple small molecules, or transforming substances into less toxic and less harmful substances, thereby degrading and removing the pollutants. Because the average energy of the electrons generated after ionization is 10eV, properly controlling the reaction conditions can achieve chemical reactions that are generally difficult to achieve or very slow.
Plasma purifier is suitable for:
Plasma purifiers are used in both residential and industrial applications. Standalone home air purifiers are the mainstream product in the residential market. Their primary function is to remove airborne particulate matter, including allergens and indoor PM2.5. They can also address volatile air pollution issues in indoor spaces, underground spaces, and vehicles caused by renovations and other factors. Due to the variable and uncertain nature of air pollutant release in relatively enclosed spaces, using an air purifier to purify indoor air is a recognized method for improving indoor air quality.
How to purchase plasma purifier:
1. Filtration technology
The main technology for filtering particulate pollutants is HEPA filters. The quality of HEPA filters varies. Although some small filters have high filtration efficiency, they have large resistance, low energy efficiency ratio, are easily clogged, and have a short lifespan. It is generally recommended to use dust-holding HEPA filters with electrostatic charging. Electrostatic charging technology makes non-woven fabric fibers have positive and negative charges to capture particulate matter in the air. Many HEPA filters are claimed to have electrostatic charging technology, but due to technical reasons, the charging charges of many filters will decay quickly in a short period of time, resulting in reduced filtration efficiency.
You can choose a HEPA filter on the market such as 3M electrostatic retention, which uses the same electrostatic retention technology as 3M masks and has no loss of efficiency.
2. Pay attention to the applicable area or particulate clean air delivery rate (CADR)
The purification capacity of an air purifier is primarily determined by its applicable area and the particle clean air delivery rate (CADR), with the relationship between the two being: applicable area = CADR x 0.1. The purification capacity for other pollutants should be considered in conjunction with the applicable area.
3. Energy efficiency ratio and energy efficiency grade
Air purifiers are typically used continuously over long periods of time. The energy efficiency ratio (EER) is a key indicator of an air purifier’s purification capacity and power consumption, and it’s worth paying attention to. The higher the EER and EER rating, the more energy-efficient the air purifier is and the lower its cost of use.
4. Ozone release
Ozone, as a strong oxidant, has excellent purification capabilities, but it is harmful to the human body. There are mandatory requirements for the amount of ozone released by air purifiers, which is limited to ≤5×10-6% (ozone has a fishy smell).
