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

Claim 0:
1. An apparatus for irradiating air in an air circulation system of a vehicle, comprising:
a filter unit configured to couple to a recirculating-air conduit connected to the air circulation system, the filter unit having an inlet end;
a filter disposed at the inlet end of the filter unit, comprising a wall of filter media having a shape that defines an interior volume of the filter;
an ultraviolet light disposed on an end plate, configured to be mounted with the ultraviolet light positioned in the interior volume of the filter and the end plate against an open end of the filter,
wherein the ultraviolet light is configured to emit ultraviolet radiation substantially at between 222 nm and 265 nm for irradiating air flow through the filter into the air circulation system;

a lens that encloses the ultraviolet light and is secured to the end plate to establish a sealed volume; and
a 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, to thereby inhibit release of ozone into the air circulation system.