Patent ID: 7498056

Claim:
Method for reconditioning air conveying or processing ducts, comprising the following operating steps: selecting at least one duct section to be treated, situated between at least one first and one second opening; closing any different openings in communication with said duct section to be treated and different from said first opening and said second opening; generating, by ventilation, a flow of conveying air with maximum turbulence and a predefined flowrate flowing between said first opening and said second opening, whereby said step involving closing of said openings results in said air flow not being influenced by any said different openings in communication with said duct section to be treated, and which are situated between said first and said second openings; generating, by atomization, an aerosol of a film-forming product, having liquid droplets of predetermined average size, within said air flow in the vicinity of an upstream section of the duct to be treated relative to the direction of movement of the air flow; depositing said droplets of product, still in the liquid phase, onto the inner surface of the section of duct to be treated with formation of a substantially uniform and continuous liquid film; crosslinking said liquid film with formation of a substantially uniform and continuous solid coating; wherein said generating a flow of conveying air is performed by means of creation of a vacuum inside the duct to be treated, obtained by providing suction ventilation in the region of said second opening.