Patent ID: 9402931
Filing Date: 2016-08-02
CPC Classification: A61L

Claim Text:
1. An air purifier apparatus comprising: a housing; a pre-filter coupled to an air inlet of the housing, the pre-filter configured to remove particulates from air drawn into the air inlet; a fan in the housing to pass the air through the pre-filter; a first radial louver in the housing, the first radial louver for receiving air from the pre-filter and promoting a spiral flow of the air from the pre-filter, the first radial louver providing the spiral flow of the air around a UV light source in a UV reaction chamber, the UV light source providing UV light to the spiral flow of the air from the first radial louver; a post filter coupled to an air outlet of the housing to output purified, filtered air; and a controller circuit including a lamp ballast for controlling the UV light source, the controller circuit driving one or more gates of one or more transistors to operate the lamp ballast, wherein the one or more transistors are metal oxide semiconductor field-effect transistors (MOSFETs), and wherein the controller circuit includes an astable multi-vibrator circuit comprising one or more diodes for driving the gates of the MOSFETs to operate the lamp ballast.