Today, the air purifier and the new air system have become one of the items purchased by many families. When people consider to choose the air purifier or the new wind system, it is hoped that it can purify the indoor air.
Indoor air pollutants are mainly PM2.5 such as suspended particulate matter, volatile organic pollutants and bacteria and other microorganisms. At present, the mainstream filtration technology of air purifier in the market is mechanical type and electrostatic type. The mechanical type belongs to the passive adsorption filtration, through the exhaust fan, the indoor air is pumped into the air purifier, and then the filter of the particulate matter and the volatile organic matter is finished through the filter net inside the machine.
Electrostatic type is the use of High-voltage electrostatic field to form corona, free electrons and particle collisions attached to the dust particles, so that the particles with the charge, and in the role of the electric field is filtered by the network adsorption. The common filter net mainly has HEPA strainer and the activated Carbon filter net, in which HEPA strainer is made of the multi-component glass fiber, can efficiently capture the airborne particle, the effective filtration 0.3 micron above can inhale the particulate matter, the smoke, the bacterium and so on.
Activated carbon filter is the use of activated carbon unique pore structure and wide distribution range of pore characteristics, adsorption of organic pollutants in the air.
In addition, some air purifiers using silver ion purification, anion purification, washing air, photocatalyst and other technologies, so that the air purifier market presents a blossoming state. How does the fresh air system work? The fresh air system is a set of air supply system and exhaust system composed of an independent air-conditioning system, its basic principle and role is to import outdoor air at the same time out of the indoor turbid gas, to not open the window can also ventilated ventilation effect. The fresh air system installs the electrostatic Dust collection box or the filter net, will have the atmosphere purification function.
In addition, the fresh air system installed on the hot switch, it has a heat exchange function. Careful friend is not difficult to find, the role of the air purifier is to clean the room has air, and the fresh air system is through the platoon, the air Supply pipeline to achieve indoor and outdoor ventilation, while purifying the air to achieve full heat exchange.
Whether it is a fresh air system or a purifier, the use of filters to purify the air requires regular replacement of the filter, if the replacement is not timely will produce two times the risk of pollution. Therefore, if only from the air purification principle, the air purifier and the fresh air system is the same, whether it is HEPA filter, activated carbon filter, electrostatic dust collection, silver ion purification, anion purification, are based on the following principles to achieve: First, the use of the principle of inertia collision adsorption, in the direction of the flow of air movement changes, the pollution particles in Under the influence of inertia, it will be linear motion, then adsorbed by the filter material; second, diffusion adsorption, which is the use of Brownian motion of a adsorption, particles from the airflow to reach the fiber surface, under the influence of electrostatic factors, directly by the fiber adsorption, the filter gas has a better effect; third, direct adsorption,
The smaller the pore size and the higher the adsorption efficiency, the better the particle removal rate is, the more the particles are larger than the filter medium.
Since the air purification technology used by the fresh air system is the same as that of the purifier, can the two achieve a complete replacement? Air purifier is the indoor air purification, resulting in a long time to open the air purifier to produce a sense of oppressed. At this point, open window ventilation will make the outdoor air pollutants into the room without barrier, is obviously not feasible. And the fresh air system can not open the window in the case of indoor and outdoor ventilation, thereby alleviating the oppressed sense. Although some fresh air system has the function of purification, but in the air pollution is extremely serious situation, the fresh air system filtration capacity is insufficient, into the indoor air is still not clean enough.
If the new air system to enhance the filtration capacity, but also may lead to the indoor air volume reduction, indoor and outdoor air pressure is poor, outdoor pollution of the atmosphere through the door and window gap into the room. Although the fresh air system and the air purifier use the same technology in purifying the atmosphere, the core effect of the two is different.