Rapport - Teknisk Design

Abstract
Ultraviolet Germicidal Irradiation has long been used for water disinfection of
microorganisms i.e. bacteria, viruses and fungi. Recently, there has been a surge
of products using UVGI for disinfecting objects. The purpose of this bachelor
project has been to evaluate the use of ultraviolet light as a means of disinfection
of DECT phones in a charging station. A study was conducted to identify the most
efficient method of ultraviolet disinfection regarding objects. To achieve a high
degree of disinfection UVB‐ or UVC‐radiation should be used as well as an
encapsulation that prevents light from entering the disinfection chamber. To
keep the light out is important to prevent photo reactivation of the bacteria
extinguished by the ultraviolet light. A prototype charger station was
subsequently constructed, using cognitive ergonomics as well as product design
to make it well suitable for use in a hospital environment.
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