Air purifier is usually composed of high voltage generator circuit negative ion generator, micro fan, air filter and other systems. Purification of air purifier from its working principle should be divided into three categories: The first category: Passive Purification category (filter purification category) The main principle is: the air drawn into the machine with a fan, filtered air through the built-in filter , Mainly to play the role of filtering dust, odor, toxic gases and kill some bacteria. Filter is divided: dust filter, to formaldehyde filter, deodorant filter, HEPA filter. One of the higher cost is HEPA filter, which can play a decomposition of toxic gases and bactericidal effect, especially to inhibit secondary pollution. The characteristics of such products is the fan function and the quality of the filter to determine the purification effect, the placement of the machine and the indoor layout of the purification is complete, indoor purification effect is not balanced, it is difficult to complete, filter replacement costs are higher. Product Representative: Honeywell and other European brands. The second category: active cleaning class (no filter type) According to the active sterilization principle of these products can be divided into silver ion technology, anion technology, low temperature plasma technology, photocatalyst technology and ion cluster ion technology. The first generation, silver ion purification technology. Simply put is the ionization of silver blown into the air to play a bactericidal effect, the disadvantage of high product cost, low rate of bacterial kill, almost no kill characteristics of the virus. Product Representative: Early Panasonic products. Second generation, negative ion technology. The main principle is the use of electrostatic discharge of negative ions, adsorption of concentrated dust in the air play a role in dust, while negative ions of oxygen in the air ionization into the role of ozone, bacteria have a certain killing effect, the advantages of such products is the product cost Lower. Product Representative: Asia, Philips. The third generation, low temperature plasma technology. The main principle is that by applying a voltage to the discharge voltage of the gas, the gas is broken down to generate various strongly oxidizing low-temperature plasmas and to decompose the pollutants in a very short period of time. This technology is generally used for industrial waste gas treatment, secondary pollution after chemical reactions, to be applied to the home air purifier, human safety testing needs to be done and the corresponding secondary pollution treatment technology. The fourth generation, Photocatalyst technology. Photocatalyst is actually the use of semiconductor light irradiation, the release of strong oxidizing power of the technology. The advantage of this technology is the lower cost of the product. The disadvantage is that the free radical activity causes it to stay in the air for a short time and has a limited killing effect on the virus and bacteria. Product Representative: Daikin. Fifth Generation, Plasmacluster Technology. Sharp 2000 global patent technology. Is a direct ionization of water molecules in the air into H free radicals and OH free radicals, while wrapping water molecules technology. OH radicals kill viruses and bacteria more than ozone, staying in the air longer than ozone. Plasmacluster ion technology enables OH radicals to encapsulate a layer of water molecules, keeping their presence in the air for a while, while utilizing bacteria and viruses for their ability to deactivate bacteria and viruses more rapidly. This technology is currently the internationally recognized medical space purification technology and is the only space purification technology capable of killing more than 99% of the H1N1 and H1N5 bird flu and SARS. Product Representative: Sharp. The third category: dual purification category (active purification + passive purification) Such purifiers mainly represent the brand: (1) Sharp (filter + Plasmacluster technology); (2) Brujal (filter + negative ion technology ); (3) Philips (filter + negative ion technology). The principle of air purifier is the micro-fan (also known as the fan) in the machine to circulate the indoor air. The polluted air passes through the air filter (twice filtered) to remove or adsorb various pollutants and then through the equipment Negative ion generator in the air outlet (negative ion generator high DC negative pressure during work), the air continuously ionization, resulting in a large number of negative ions, sent by the micro-fan to form a negative ion airflow, to achieve the purpose of cleaning, purifying the air.
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