Fluorescent lamps for disinfection, tanning, photobiological installations. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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UV and special fluorescent lamps. Fluorescent lamps for disinfection, tanning, photobiological installations. Encyclopedia of radio electronics and electrical engineering

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Light is more than just lighting. And convincing confirmation of this is a wide range of modern LL ultraviolet (UV) and special spectrum.

The unique combination of optical (light and UV) radiation from a mercury discharge and visible light generated by a phosphor makes it possible to create LLs with virtually any spectral properties.

Thanks to the creation and improvement of artificial sources of UV radiation, specialists working with UV radiation are provided with significantly greater opportunities than when using natural optical radiation (OI).

Fluorescent lamps for disinfection, tanning, photobiological installations
Rice. 2.9. Subranges of ultraviolet radiation

The spectrum of the extraatmospheric Sun in the UV region is stable, well studied, extending from 400 to 210 nm (continuous component). The UV radiation range is usually divided into three subranges (Fig. 2.9): "A" - 320-400 nm; "B" - 280-320 nm; "C" - 180-280 nm.

The ratio of solar radiation fluxes in three ranges of the UV region are given in table. 2.17.

Table 2.17. Emission of artificial sources for the installation of photobiological action in the ranges A, B and C of the UV region of the spectrum

Fluorescent lamps for disinfection, tanning, photobiological installations

Thus, short-wavelength UVC radiation, regardless of the time of year, day or atmosphere, is absent in nature. With a small proportion of medium-wave UVB radiation, long-wave UVA radiation predominates in the natural spectrum of RI. Depending on the angular position of the Sun and the state of the atmosphere ratio radiation in the two indicated ranges varies very little.

The development and production of UV lamps for photobiological installations (UFBD) is currently being carried out by both a number of the largest electric lamp companies (PHILIPS, OSRAM, RADIUM, SYLVANIANFLP), as well as a fairly large number of highly specialized companies, for example, Original Hanau, UV-Technik, Wedeco AG (Germany), Hanovia (USA), Lighttech Ltd (Hungary), etc. There are also several manufacturers of UV lamps for UVBD in Russia: Lisma-VNIIIS OJSC (Saransk), NPO LIT (Moscow), SKB OJSC "Xenon" (Zelenograd), LLC "VNISI" (Moscow).

The range of UV lamps for UVBD is very wide and varied; for example, the world's leading manufacturer PHILIPS has more than 80 types.

Unlike lighting lamps, UV sources typically have a selective spectrum designed to achieve the highest possible effect for a particular FB process.

On fig. 2.10 shows the classification of artificial UV AI by application.

Fluorescent lamps for disinfection, tanning, photobiological installations
Rice. 2.10. Classification of artificial UV AI by application

Undoubtedly, the main field of application of UV lamps for many years has been UVBD for air disinfection. Out of competition for these purposes were and remain gas-discharge low-pressure mercury lamps (LP) in quartz or uvio glass, emitting in the resonant line of mercury 253,7 nm, located near the maximum of the spectrum of bactericidal action, up to 40% of the consumed electrical power.

Author: Koryakin-Chernyak S.L.

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