The air that we breathe in everyday life continues to deteriorate day by day. That, in turn, affects our health purely negative.
Problem in air conditioning can be solved by means of various types of air purifiers. These devices clean the air of such harmful substances to the human body, such as: dust, viruses and gases, odors (cigarette smoke, urban smog, etc.), allergens such as pollen, pet dander, etc. The purifier is necessary in the concessions where small children are constantly.
There are several major categories of air purifiers and filters used in them: mechanical filters, air cleaners with HEPA filters, water filters, adsorption (carbon) filters, air cleaners with photocatalytic filter, air cleaners recommended by the asthmatics and allergy sufferers, as well as complexes of air cleaner-humidifier. We consider these categories in detail.
Mechanical filter (prefilter) are used in all air purifiers. They are the simplest filters used in air cleaners for removal of large dust particles and pet hairs. The main function is not only to protect people from these particles, but also protect the next filter elements of air purifier from premature wear. Such filters are reusable.
Air purifiers with HEPA filter (HEPA – High Efficiency Particulate Arresting). HEPA filters have a fairly large percentage of efficiency, they are made of special porous material based on glass fiber (able to filter out particles up to 0.3 microns) and they are a key element in many air cleaners. The principle of operation of air purifiers with HEPA filter is quite simple – the flow of air is forced through a filter with a fan and particles are deposited on it. If we consider that major allergens, such as: dust, pet dander, pollen, etc. have a size larger than 1 micron, the air purifiers with these filters can be recommended for use by allergy sufferers and asthmatics. The surface of the HEPA filter is typically impregnated with a special chemical solution that depress vital functions of bacteria.
Water filter is typically used in climate complexes. Work of the purifier with a water filter is due to the air intake fan, the particles acquire a certain charge and having served on opposite charge wetting disks, dust is attached to then and washed into the tray. No need for replacement filters.
Purifiers with adsorption (carbon) filter can capture virtually all toxic air impurity with a rather large molecular weight. Purifiers with these filters are not very effective to use at high moisture and removal of gases with very low molecular weight. Most of this type of filters in air cleaners are used in combination with other filters to provide better air cleaning. Adsorption (carbon) filters in purifiers must be necessarily changed, approximately every four months, since the accumulation of large amounts of toxins may become a source of contamination.
Purifiers with photocatalytic filter is a novelty in the field of purifying equipment and is one of the best to date. The operating principle of an air purifier with a photocatalytic filter is decomposition and oxidation of odors, toxic contaminants and organic compounds into harmless components of clean air at the surface of the photocatalyst under UV light. Size of destroyed particles – up to 0.001 microns. Due to its principle the air cleaner with a photocatalytic filter can never become a source of contamination. Unlike other air purification systems, this method of photocatalysis releases the air from all contaminants, including viruses, bacteria and gas pollution. Ultraviolet radiation in air purifiers with photocatalytic filter kills microorganisms dangerous to humans. Removal of odors when using these air purifiers are also located at a fairly high level, for example, in one minute of work the filter remove 85% of cigarette smoke. Air purifiers with photocatalytic filter are the most economical. Also the positive point is very low noise operation, that is especially useful when working at night.
Air purifier-humidifier complexes combine two key functions for creation of a favorable ecological environment in the room: cleaning and humidifying the air.