Patent ID: 7473304

Claim:
An air filtration device for suppressing biological pollutants for closed environments, that is suitable to be associated with air outlets in ventilation, climate control and air purification devices and systems, comprising: at least one box-shaped enclosure provided with at least one inlet for air to be filtered; at least one perforated conducting grille located at said at least one inlet, said grille having a preset negative electrical potential and being adapted to emit electrons when air flows, so as to give a negative electric charge to any particles to which microorganisms present in the air adhere; at least one air passage duct formed internally to the filtration device, between at least one collector plate for collecting the negatively charged particles to which microorganisms adhere, said collector plate having a predefined positive potential; at least one deflector plate, which has a negative potential and is adapted to divert the particles to which microorganisms adhere, whereby an electrical field is generated between said collector plate and said deflector plate, which face each other, said field being adapted to divert and precipitate the particles to which microorganisms adhere onto said collector plate; inactivation means for inactivation of microorganisms that is provided and at least one air outlet of the filtration device for exit of filtered air, said grille comprising a distribution of pointed protrusions for scattering the emitted electrons when air passes through said grille; and wherein three said collector plates and eight said deflector plates are provided, two of said collector plates being located respectively in an upper region and in a lower region inside said box-shaped enclosure, each said collector plate facing two respective said deflector plates arranged in succession, with a third said collector plate being arranged substantially at a centerline within said box-shaped enclosure, each side of said third collector plate facing two said deflector plates arranged in succession, said deflector plates being arranged in pairs which are arranged side by side in succession, two by two, between said collector plates, and wherein said inactivation means comprises two germicidal lamps, each one of which is arranged between a pair of said two respective deflector plates arranged in succession.