UV Air recirculators

The device is designed for disinfection the indoor areas, meanwhile not restricting people from being indoors, which means that the disinfection is happening right in the presence of a person, being completely harmless for their health. Ultraviolet radiation has long been used as one of the most effective disinfection practices. The widely spread quartz lamp has a double disinfecting effect 1) Ultraviolet radiation (at a wavelength of 254 m-9) destroys the DNA of microorganisms, which eliminates their ability of reproduction. 2) generates ozone (at a wavelength of 185 m-9) - a powerful oxidant destroying all potentially harmful microorganisms in the atmosphere; The main disadvantage of the quartz lamp is its inability to carry out disinfection in the presence of a person, since both components of the disinfecting effect are harmful to humans.

In the Philips TUV lamps lamps instead of quartz a special patented material is used which is capable of filtering the ozone-forming spectrum

As it can be noticed, the lamp material filters out the ozone-forming area, the generation of ozone in this lamp is excluded, respectively, so the disinfection occurs only by the ultraviolet radiation.

The Satelit UV recirculator provides air handling with ultra-violet irradiation in a space which is unavailable for human to be influenced by. The recirculator is equipped with a sensor that turns the lamp off, if the housing is opened, excluding the impact of ultraviolet light on human eye and skin.

The energy exposure required to decontaminate the infectious agent by 90 % (in the air or on the surface) depends on the environmental conditions (for instance, the level of relative humidity) and the type of infectious agent. In case of low-pressure mercury lamps, which predominantly emit radiation with a wavelength of 254 m-9, it usually ranges from 20 J/m2 to 200 J/m2 for viruses and bacteria (for most viruses: from 20 J/m2 to 100 J/m2) [CIE, 2003].

It is necessary that the bacterium/virus is situated in the radiation zone of the required power for a certain period of time in order to obtain such a dose. Thus, the air flow, the geometric dimensions of the recirculator housing and the lamp power are selected in such a way that the bactericidal / antiviral effect is reaching the maximum point. It goes without saying that the purity of the air is one of the main factors affecting the desired result of disinfection due to the fact that dust particles can "shade" the lamp's effect on bacteria/viruses. However, in the Satelit UV recirculator this phenomenon is minimized by the mirror-polished inner surface of the housing, which is used to enhance the radiation effect reflected by a ray from the wall, as well as the effect of turbulence achieved owing to the special shape of the diffuser at the fan inlet (Fig.2-4). Timely maintenance (dedusting-cleaning) of the inner surface of the housing and the lamp itself is necessary for its proper operation.

The recirculator is designed for local disinfection inside the place. Air disinfection capacity is 0,6 m3/min. The most effective installation is supposed to be not farther than 1-2 m from the place of potential infection. Thus, when it comes to doctor's office, it is recommended to install the device adjacent to the place where the patient is examined. In case of air flows in the room ( usually caused by fans or air conditioners), the spread of de-polluted (disinfected) air is no longer local, but disinfected air is moving throughout the volume of the room. In order to increase the disinfection performance in such places, several recirculators can be placed in different corners of the room.