Patent ID: 11904267
Assignee: THE BOEING COMPANY
Field: Chemical engineering (Chemistry)
Classification: CPC B  A  F | IPC A  B

Claim 10:
11. A method for irradiating air in an air circulation system of a vehicle, comprising the steps of:
coupling a filter unit to a recirculating-air conduit that is connected to a manifold of the air circulation system, the filter unit having an inlet end;
positioning a filter in the inlet end of the filter unit, the filter comprising an outer High Efficiency Particulate Air (HEPA) media, and an inner activated carbon filter media defining an interior volume of the filter;
enclosing an ultraviolet light in a lens;
securing the lens enclosing the ultraviolet light to an end plate to establish a sealed volume, relative to the filter unit, with the lens enclosing the ultraviolet light positioned in the interior volume of the filter and the end plate positioned against an open end of the filter;
coupling a ventilation tube to the end plate, the ventilation tube extending through the end plate into the sealed volume enclosed by the lens, for enabling venting and extraction of ozone or gaseous effluence released in the event of breakage or failure of the ultraviolet light; and
supplying power to an electrical connector of the ultraviolet light, via an electrical power connection disposed on the end plate, to cause the ultraviolet light to emit ultraviolet radiation between 222 nm and 265 nm for irradiating air flow through the filter into the air circulation system.