We pay attention to what we eat. However, about what we breathe, reflect rare. Even more rarely do something to change the situation for the better. Household air cleaners, of course, not a panacea. But still with them the air is cleaner, more suitable for the “use” it to the destination. A clean air – a guarantee of health as quality food and lack of bad habits (eg, smoking). With these devices a man, albeit only to a certain extent, can control the quality of air around them, thereby increasing the quality of life.
Types of air purifiers
The basis of the design of the air cleaner is a fan and a set of filters. By the principle of operation, the system resembles a household vacuum cleaner, although it is slightly different structurally from it: the polluted air is pumped into the purifier fan, passes through a set of filters and returned to the room. The design of modern devices usually combines several types of filters, thereby achieving an acceptable level of air purification. Filters are:
– Pre-treatment (mechanical, for “large” pollutants such as animal hair, poplar fluff);
– Electrostatic ionizing dust particles which then “stick” under the influence of electrostatic forces to the collecting electrodes;
– Water (or “cleaning air”), contaminated air mixing with the water spray, whereby the dust particles become wet and settle rapidly in the water tank unit;
– Carbon (adsorption), do not let the complex organic molecules, “responsible” for the unpleasant odors;
– HEPA capable delay fine dust (0.3 micron size), including some species of bacteria;
– Photocatalytic (some of the best to date) – organic contaminants under the action of ultraviolet radiation are destroyed on the catalytic filter (titanium dioxide) into harmless components (water and carbon dioxide), and photocatalytic oxidation equally effective with respect to toxins, viruses, bacteria and even any organic compounds.
Related models of air purifiers can be divided into three main groups. Firstly, air with dust filters, consisting of a mechanical preliminary, HEPA and charcoal filter. Today they occupy a major part of the modern market of household air cleaners, as the most affordable and satisfactory air quality processing. The main disadvantage – the need for additional expenditure for the purchase of replacement filters, cartridges, and so on..
Second, the “air wash”. With the system of rotating the plastic discs, the lower part immersed in water, the fine mist is produced, which is run through the contaminated air through the fan. As a result, dust microparticles quickly become wet and are deposited in the water tank of the device, as after a summer rain. The main advantage of this group of air purifiers – the lack of replacement filters and cartridges (simply replace the water in the tank), as well as the ability to no extra effort to increase the humidity in the room. The main drawback – not very high degree of air filtration
And thirdly, the photocatalytic air purifiers. The most expensive but also the most effective category of devices. The contaminated air is pre-filtered with mechanical filter to retain large debris, then the remaining dust particles under the influence of ultraviolet light in a special oxidized porous catalyst to elemental state (carbon dioxide and water). The validity of the basic elements of the device is not limited, as the dust on the main filter does not accumulate and decompose, but the very substance of the catalyst (titanium dioxide) during the reaction is not consumed. Regular replacement is only required for an inexpensive dust filter.
It should be noted that many models of air purifiers in all three groups are equipped to work more effectively with ionizing cleaners or electrostatic precipitators, which are well clean the air of fine dust. Corona discharge is used in the electrostatic precipitator, destroys odor molecules, viruses, bacteria and allergens. Over the coarse particles are ionized and acquiring an electric charge, are attracted by electrostatic force to the oppositely charged electrode-filter.
Further – more advanced models of air purifiers, which, according to ZOOM.CNews, worthy of attention of our readers.
Ballu AP250. This air purifier is able to clean the air in rooms up to 40 m². So according to the manufacturer. However, practice shows that this value is most often somewhat exaggerated. In any case, a standard room (bedroom, kitchen or living room) in an apartment it should be enough.
In Ballu AP250 several air purification degrees, or, if you prefer, several options for treatment. There are HEPA (filtration degree – 99.9%) and a charcoal filter. There is also a photocatalyst (NANO-) filter. It is combined with a glow lamp ultraviolet rapidly decompose formaldehyde, benzene, toluene, xylene, and many other noxious and malodorous substances in the air. It destroys viruses and bacteria. Furthermore, air ionizes air. Maximum unit capacity (breathability) – up to 150 cubic meters of fresh air per hour. Power Consumption – 45 Watts.