Secret: Is the air purifier really useful?
China’s air purifier market is still in its infancy, and there is no uniform mandatory quality testing standard in the industry. The air purification brand and function in the market are mixed, and the purification principle is also varied. There are even phenomena such as exaggerating purification effect and price opacity, which makes it difficult to judge and compare the purification effect.
Since 2013, the “haze” has been plagued by many Chinese people. In China, many PM2.5 burst tables, care for the family and their own health, in addition to spitting smog, more is to find ways to fight against smog, try to reduce the damage caused by smog, especially for families with children, smog The feeling of disgust is even worse.
The public’s dissatisfaction and dislike of the smog have given birth to the popularity of the best large room air purifier for pets business.
“For the lungs!” “For the children!” “Buy an air purifier!”
So, is the home air purifiers for large rooms really useful?
Air purifier concept
Air purifiers are products that can absorb, decompose or convert various air pollutants (generally including PM2.5, dust, pollen, odor, formaldehyde, and other decoration pollution, bacteria, allergens, etc.) to effectively improve air cleanliness. It is used in the home, medical and industrial fields.
The home field is divided into a systemic fresh air system (with two sub-categories of heat exchange and no heat exchange) and a single machine. It mainly solves indoor, underground space and air pollution problems caused by decoration or other reasons. The use of air purifiers to purify indoor air is one of the internationally recognized methods for improving indoor air quality due to the persistence and uncertainty of the release of air pollutants in relatively closed spaces.
Purification technology
1. Superstructure photo mineralization technology
The use of precious metals, rare earth materials and photosensitizing materials to synthesize novel ultra-structural metal compounds, and then combined with nano-oxides; technically change the surface electron activation of photocatalytic materials, activate energy from ultraviolet light to visible light, thereby achieving high specific surface and Uniformity of high crystallinity. At the same time, it promotes the separation of photogenerated carriers and reduces the probability of compounding. The time to decompose pollutants is shortened from several hours to a few minutes of historical subversiveness, and the mineralization rate is also increased to 98.72%.
2, plant source
The sesquiterpenoids are often present in volatile oils in the form of alcohols, ketones, lactones, etc., and have a strong aroma and biological activity, which can effectively dissolve particulate matter and bacteria in the air, and have sterilization and removal. Odor, increase the oxygen content of the air, keep the air fresh and so on.
The plant itself has a certain smell left in the air, and once it completes the oxidation process, the odor will quickly disappear, unlike other plant essential oils that have been left for a long time. The active ingredient quinone small molecule simultaneously encloses, oxidizes, decomposes, removes or detoxifies the harmful pollutants of aldehyde, benzene, and ether, and increases the effective oxygen content in the air, which significantly improves the respiratory function of the human body.
3. NCCO technology
Nico Oxygen Polymerization is a technology that specifically treats and decomposes gaseous contaminants in the air. Nanomaterials can be tailored to the characteristics of the contaminant to improve the system’s ability to handle specific contaminants. After the nanomaterial adsorbs the pollutants, the active oxygen can be used to decompose the pollutants and continuously regenerate. This not only greatly extends the life of the system, but also enhances the capacity to handle pollutants.
The process of decomposition of pollutants in living oxygen in nanomaterials is much faster than in air. In addition, a catalyst is added to the nanomaterial to further increase the rate at which the pollutant is decomposed by active oxygen.
It cannot handle non-gas pollutants such as oil and dust that are difficult to decompose. Nanopores in nanomaterials are more likely to be blocked by these substances, losing the ability to handle contaminants.
4, HEPA filtration technology
HEPA is an abbreviation for (high-efficiency air particulate filter). The HEPA filter consists of a stack of continuous, pre-folded, sub-glass fiber membranes that form a wavy gasket for placement and support of the filter media.
HEPA is an internationally recognized and best high-efficiency filter material. It was originally used in nuclear energy research and protection and is widely used in places requiring high cleanliness such as precision laboratories, pharmaceutical production, atomic research, and surgery. HEPA is made of very fine organic fibers. It has a strong ability to capture particles, has a small pore size, large adsorption capacity, high purification efficiency, and water absorption. The particle purification rate for 0.3 microns is 99.97%. That is, only 3 out of every 10,000 particles are able to penetrate the HEPA filter membrane. Therefore, its effect on filtering particulate matter is very obvious. If it is used to filter cigarettes, the effect of filtration can be almost 100%, because the size of the particles in the cigarette is between 0.5 and 2 microns, and the membrane cannot pass through the HEPA filter.
The filtration efficiency of HEPA high-efficiency particulate filters is directly proportional to their surface area. The air purifier’s HEPA high-efficiency particulate filter is multi-layered, and the expanded area is about 14.5 times larger than that when folded. The filtration efficiency is outstanding.
5, ion wind technology
The ion wind air purifier is supposed to adsorb particles to the charged metal blades in the purifier. The blades push the air through the assembly to form a gas stream. The negative ions and positive ions attract each other, and the particles and smoke in the air are attached to the blades.
The advantages of ion wind technology are:
Efficient sterilization: sterilization rate > 99%, effectively inhibiting the spread of the influenza virus and bacteria and cross infection; efficient dust removal: dust removal efficiency > 99%, CADR225 cubic meters/hour, effectively remove allergens, effectively remove cigarette nicotine particles and smoke, effective Removes fumes, and odors; safely and effectively decomposes volatile organic compounds such as formaldehyde and benzene into H2O and CO2, causing secondary pollution without any other harmful substances; energy saving, silent operation: no fan is required, the plasma field automatically drives air circulation to provide super Low-energy, no-tone work; low-carbon and environmentally-friendly life: no need to replace the filter membrane, convenient for manual cleaning and repeated use.
6, ozone technology
Ozone is a blue gas with a special odor. The effect of ozone on the virus is first of all the four polypeptide chains of the coat protein of the virus, and the RNA is damaged, especially the protein that forms it. After the phage was oxidized by ozone, it was observed by electron microscopy that the epidermis was broken into many fragments, and many ribonucleic acids were released therefrom, which interfered with the adsorption to the deposit. The thoroughness of ozone sterilization is unquestionable.
However, ozone has an erosive and damaging effect on the human body, especially in the eyes and respiratory tract. Surface ozone is also harmful to crops or forests. In the environment, due to the failure of vehicle exhaust emissions, the concentration of ozone already in the environment is close to 0.02 ppm. The reason why it is not smelling is that air pollution is too serious. Excessive ozone is a serious hazard to human health. It strongly stimulates the respiratory tract, causing sore throat, chest tightness, and cough, bronchitis, and emphysema; it can cause human neurotoxicity, dizziness, headache, decreased vision, memory loss; It can destroy the vitamin E in human skin, causing wrinkles and dark spots on the skin. Ozone can also damage the body’s immune function, induce lymphocyte chromosomal lesions, accelerate aging, and cause pregnant women to become deformed. Air purifiers that use ozone sterilization should strictly pay attention to whether the ozone production rate meets national standards.
7, UV technology
Ultraviolet light is a general term for radiation in the electromagnetic spectrum from 0.01 to 0.40 micron and does not cause people’s vision. Ultraviolet rays are classified according to wavelength: near-ultraviolet UVA, far-ultraviolet UVB, and ultra-short ultraviolet UVC. The degree of penetration of ultraviolet light on human skin is different. The shorter the wavelength of ultraviolet light, the greater the damage to human skin. Short-wave UV rays can pass through the dermis, while medium waves can enter the dermis. Ultraviolet light with a wavelength of 200 to 290 nm can penetrate the cell membrane of bacteria and viruses, damage nucleic acids (DNA), and make cells lose their ability to reproduce and achieve rapid sterilization. Short-wavelength ultraviolet rays having a wavelength of 200 nm or less can decompose O2 molecules, and the generated O* combines with O2 to generate ozone O3. Ultraviolet rays and ozone have a strong ability to oxidize and decompose organic molecules including malodor, and the synergistic effect of UV/O3 is exerted in air purification treatment.
8, photocatalyst technology
The photocatalyst is a nano-scale metal oxide material (titanium dioxide is more commonly used). It is applied to the surface of the substrate to produce a strong catalytic degradation function under the action of light: it can effectively degrade toxic and harmful gases in the air; it can effectively kill a variety of bacteria, and can decompose the toxins released by bacteria or fungi. Harmless treatment; also has the functions of deodorization and anti-fouling.
Photocatalyst must be exposed to ultraviolet light to function. If the sun is not available, if you want to activate the photocatalyst, you must add an additional UV lamp. The so-called “cold catalyst” that plays a role in the absence of light has lost the true meaning of “photocatalyst”. However, too much ultraviolet light is harmful to the human body. Photocatalyst technology relies on ultraviolet light to illuminate the titanium oxide ions on the photocatalyst network, causing it to activate and oxidize bacteria that come into contact with its surface.
9, Maya blue purification technology
For air pollution problems, a better treatment method is to use Maya Blue. Maya Blue is based on attapulgite and sepiolite. It is made of natural minerals such as diatomaceous earth and tourmaline. It is made of special processing technology. Its internal pores have a pore diameter of 0.27-0.98 nm. At the same time, it has weak electrical properties. The molecular diameters of formaldehyde, ammonia, benzene, toluene, and xylene are all between 0.4 and 0.62 nanometers, and they are all polar molecules. They have the characteristics of preferentially adsorbing harmful gases such as formaldehyde, benzene, and TVOC. The effect of indoor air.
Advantages: pure natural nanomaterials, no secondary pollution, good effect. Disadvantages: The price is more expensive than activated carbon.
10, activated carbon technology
The activated carbon has a well-developed pore structure and a large surface area (above 1500 m2/g) and has a strong adsorption capacity. Activated carbon is obtained by carbonization, activation, and post-treatment of raw materials such as coal, wood, and husk. Since the carbon particles have a large surface area, they are insufficient contact with gases (impurities). When these gases (impurities) are adsorbed by the micropores, they purify. However, activated carbon can only temporarily adsorb certain pollutants. When the temperature and wind speed increases to a certain extent, the adsorbed pollutants may be released and re-enter the breathing space to cause secondary pollution. Therefore, the filter material should be replaced frequently to avoid adsorption saturation. The activated carbon in the scented filter is made of coconut shell by special treatment and is pressed into a cylindrical shape. Under the premise of not obstructing air circulation, the activated carbon surface is exposed to as many odors and chemical pollutants as possible, and the new one is successfully improved. The ability of the air purifier. The activated carbon in the scented filter has a large adsorption area and superior filtration capacity. The research data shows that the adsorption area of activated carbon with a weight of 1 g can reach 500-1500 m2.
11, electrostatic technology
Electrostatic dust removal: It can filter dust, smoke, and bacteria smaller than cells and prevent diseases such as lung disease and lung cancer. The most harmful to the human body in the air is dust less than 2.5 microns because it penetrates cells and enters the bloodstream. The ordinary purifier uses filter paper to filter the dust in the air, which is easy to block the filter hole, and the dust accumulates more, which not only has no sterilization effect but also easily causes secondary pollution.
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