1. "HEPA high efficiency filtration technology" has good filtration efficiency HEPA is an internationally recognized and best high-efficiency filter material. The HEPA filter consists of a stack of continuous and front-folded sub-glass fiber membranes (PP and polypropylene are commonly used in air purifiers) to form wavy gaskets for placement and Support the filter boundary. The filtration efficiency of HEPA high efficiency particulate filters is directly proportional to their surface area. At present, the HEPA high-efficiency particulate filter of the HEPA air purifying device is multi-layered, and the expanded area is increased by a factor of ten to several tens of times when folded. The filtering efficiency is outstanding. Purification principle: particle inertia principle and diffusion principle. Advantages of HEPA purification technology: The effect of filtering particulate matter is very obvious! The ability to capture particles is strong, the pore size is small, the adsorption capacity is large, the purification efficiency is high, and the water absorption is provided, and the particle purification rate for the 0.3 micron is 99.97%. If you use it to filter cigarette smoke, the filtering effect can reach almost 100%. For particles above 2.5μm, the filtration effect can reach 99% or more with only F8. Disadvantages of HEPA purification technology: A. China's dust is more serious, and the service life of HEPA may be relatively shortened, which means that HEPA filters need to be replaced frequently and the cost of use is high. B. At present, the wind speed in the air purification industry is generally not working at the appropriate wind speed of HEPA. The high-demand places such as clean rooms ensure that the purification efficiency of HEPA is around 0.3-0.5m/s, and the wind speed in actual use is far. Above this value. 2, "static dust collection technology", no consumables dust removal Electrostatic dust collection technology utilizes the principle of high-voltage electrostatic adsorption to filter pollutants in the air. It is also widely used in indoor air purifiers as a basic purification technology. Purification principle: the role of high voltage and strong electric field, the particles are adsorbed on the negative plate or the positive plate, and the different charges attract each Other. Advantages of electrostatic dust collection technology: A. Efficiently remove particulate pollutants such as dust, soot, pollen, cigarette flavor and kitchen fumes. B. At the same time, it can effectively adsorb gaseous pollutants in the air and filter out pathogenic micro-organisms in the air. C, no consumables, cleaning can be reused, truly environmentally friendly. Disadvantages of electrostatic dust collection technology: A. It is easy to produce ozone, and it only has effect on large particle gases such as particulate matter. It is mainly used for dust removal, and has little effect on chemical pollution caused by removing formaldehyde, benzene series, TVOC and other decoration, which is equivalent to the junior high-efficiency filter. B, the essence of purification, but also physical purification, harmful substances are not chemically decomposed. 3, "activated carbon adsorption technology", strong adsorption capacity Activated carbon is divided into three types: coconut shell, husk and coal. The adsorption capacity is the strongest with coconut shell activated carbon. Purification principle: porous structure of activated carbon, large specific surface area, can adsorb small particles. Advantages of activated carbon: Purification of all air pollutants. It has strong adsorption capacity and can effectively absorb harmful substances (such as dust, particles, free molecules, bacteria, etc.) in indoor air. Disadvantages of activated carbon: Activated carbon is only a physical filter, the pollutants are not eliminated, only temporary adsorption, and with the increase of temperature and wind speed, the adsorbed pollutants may be released, so the filter material should be replaced frequently to avoid adsorption saturation. . 4, negative ion technology, smoke deposition, supplement "air vitamins" Through the negative ion generator, a large number of negative ions, also called negative oxygen ions, are produced, which have the functions of sedation, hypnosis, analgesia, appetite increase, blood pressure lowering and the like. After the thunderstorm, people feel comfortable, that is, the increase of negative ions in the air. Air negative ions can reduce active oxygen (oxygen free radicals) generated by pollutants, nitrogen oxides, cigarettes, etc. from the atmosphere, reduce the harmful effects of excessive active oxygen on the human body; neutralize positively charged airborne dust without charge and then settle The air is purified. Purification principle: positive and negative charge neutralization, and negative ion reduction. Negative ion advantages: A. The sedimentation effect of second-hand smoke and other particulate matter is obvious. Therefore, the smoke smell can be removed to a certain extent, mainly because the smoke particles in the air are reduced, and the smoke-like particulate matter settles to the ground, and more belongs to physical purification. B. It has anti-oxidation, anti-aging effect, enhances human immunity and enhances self-healing ability. It can effectively enhance blood oxygen carrying capacity by about 20% and effectively promote human metabolism to improve sleep, which has a certain effect on sterilization. Negative ion disadvantages: A. The process of purifying the negative oxygen ions is mainly “physical purificationâ€, and the pollutants in the air are transferred to the ground. B. Negative oxygen ions have a short life in air, so they need to be released continuously. C. The pollution purification effect of formaldehyde benzene series caused by decoration and decoration is very general, so you need to choose differently. 5, ozone, sterilization and deodorization quickly and thoroughly Active oxygen technology is based on the application of ozone generators, and is also a kind of basic purification technology. All ion generators can basically release a certain concentration of ozone, and are also widely used in most air purifiers. When using a ozone-sterilized purifier, it is necessary to strictly observe whether the ozone production rate meets the national standards (the ozone safety concentration specified by the Ministry of Health is 0.1 ppm, the industrial hygiene standard is 0.15 ppm), and the ozone generator is used to purify the indoor air. When the personnel must leave, the window is sterilized for more than half an hour after disinfection. Purification principle: The strong oxidizing property of ozone can oxidize organic matter, odor molecules, and the functional structure of oxidizing microorganisms to inactivate. Advantages of ozone purification: The inactivation of ozone by bacteria is very rapid, and the thoroughness of sterilization is also unquestionable. When used reasonably, it is the most environmentally-friendly and completely effective purification method recognized internationally. When the concentration reaches a certain value, sterilization can be completed in an instant. Disadvantages of ozone purification: Excessive ozone has serious harm to human health! High concentration of ozone can cause sore throat, chest tightness and cough, bronchitis and emphysema, neurotoxicity, and damage to the body's immune function. Because ozone is highly irritating, people have long avoided it when they feel uncomfortable, so there is generally no poisoning during use. 6, "photocatalyst catalytic decomposition technology" has ultraviolet light to play a role Photocatalytic technology: It is a technology that utilizes a new type of composite nano-high-tech functional material, which refers to photocatalytic reaction. Principle of photocatalytic purification: Under the illumination of a light source, the photocatalyst can use the energy of a specific wavelength source to generate a catalytic effect (redox reaction), so that the surrounding oxygen and water molecules are excited into highly active free radicals. These free radicals are also called "Light plasma" can almost decompose all organic substances and some inorganic substances harmful to the human body or the environment. (Photocatalyst, also known as photocatalyst, is a type of semiconductor material represented by titanium dioxide (TiO2), which does not change itself under the illumination of light, but can promote chemical reactions and has catalytic function. General name) Photocatalysis Advantages: Photocatalytic technology has a broad spectrum of practical effects and high purification efficiency. Photocatalysis Disadvantages: Photocatalyst must be exposed to ultraviolet light to function. This means that one must additionally add ultraviolet light to emit ultraviolet light (wavelength at 254nm or 365nm), but too much ultraviolet light is harmful to the human body, so avoid ultraviolet light exposure; second, the photocatalyst must be in contact with ultraviolet light, so In the environment with a lot of particles, the photocatalyst will "hibernate". Kenwood Mobile Radio,Kenwood Tri Band Mobile Radio,Kenwood Vhf Mobile Radio,Kenwood Digital Mobile Radio Guangzhou Etmy Technology Co., Ltd. , https://www.digitaltalkie.com