Abstract: Firstly,this thesis aims to introduce some knowledge about UVGI.Then,with regard to the present mathematics of UVGI and the mathematics of intensity field of a UVGI lamp,a new type of air conduit system of UVGI is designed.A new form of laying UVGI lamps is employed to improve the uniformity of intensity of Ultraviolet in air conduit and strengthen the intensity,thus to be resulted in a satisfactory sterilization effect.

Key words: HVAC； UVGI； microbe pollution； air disinfection；