US 11,730,849 B2
Air treatment method
Karen Benedek, Winchester, MA (US); Philip C. Carbone, North Reading, MA (US); Peter J. Loftus, Cambridge, MA (US); Anna Cheimets, Somerville, MA (US); and David Hensel, Boston, MA (US)
Assigned to Bluezone IP Holding LLC, Woburn, MA (US)
Filed by Bluezone IP Holding LLC, Woburn, MA (US)
Filed on Feb. 22, 2021, as Appl. No. 17/180,979.
Application 17/180,979 is a continuation of application No. 16/268,145, filed on Feb. 5, 2019, granted, now 10,933,159.
Application 16/268,145 is a continuation in part of application No. 15/878,598, filed on Jan. 24, 2018, granted, now 10,898,604.
Application 15/878,598 is a continuation in part of application No. 15/461,433, filed on Mar. 16, 2017, abandoned.
Claims priority of provisional application 62/626,548, filed on Feb. 5, 2018.
Prior Publication US 2021/0170063 A1, Jun. 10, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61L 9/20 (2006.01); A61L 9/12 (2006.01); B01D 53/00 (2006.01); B01D 53/86 (2006.01); B01D 53/96 (2006.01); B01D 46/00 (2022.01); A61L 9/04 (2006.01); B60H 3/00 (2006.01); F24C 15/20 (2006.01); B01D 46/80 (2022.01); A61L 9/014 (2006.01)
CPC A61L 9/205 (2013.01) [A61L 9/046 (2013.01); A61L 9/12 (2013.01); A61L 9/20 (2013.01); B01D 46/0028 (2013.01); B01D 46/0038 (2013.01); B01D 46/80 (2022.01); B01D 53/007 (2013.01); B01D 53/869 (2013.01); B01D 53/8675 (2013.01); B01D 53/8678 (2013.01); B01D 53/96 (2013.01); B60H 3/0071 (2013.01); F24C 15/205 (2013.01); A61L 9/014 (2013.01); A61L 2209/111 (2013.01); A61L 2209/12 (2013.01); A61L 2209/134 (2013.01); A61L 2209/14 (2013.01); A61L 2209/16 (2013.01); A61L 2209/212 (2013.01); A61L 2209/22 (2013.01); B01D 2251/104 (2013.01); B01D 2255/802 (2013.01); B01D 2255/9032 (2013.01); B01D 2257/106 (2013.01); B01D 2257/708 (2013.01); B01D 2257/90 (2013.01); B01D 2257/91 (2013.01); B01D 2258/0275 (2013.01); B01D 2258/06 (2013.01); B01D 2259/4508 (2013.01); B01D 2259/804 (2013.01); B01D 2279/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for treating air, the method including the steps of:
providing an air treatment apparatus having a housing and a housing inlet in a kitchen including a ventilation hood or a cooking appliance;
determining with an electronic control device that the ventilation hood or the cooking appliance has been turned off;
in response to determining the ventilation hood or the cooking appliance has been turned off, operating the air treatment apparatus to treat air by causing the air treatment apparatus to operate as set by the electronic control device in an air cleaning mode followed by a self-cleaning mode, the air cleaning mode including:
causing air flow into the air treatment apparatus through the housing inlet;
causing air flow through the air treatment apparatus at a first flow rate;
oxidizing or inactivating contaminants in the air flow via a first application of ozone and/or ultraviolet light within an air treatment zone in the air treatment apparatus wherein the ultraviolet light generates ozone;
oxidizing or inactivating contaminants via a first catalyst layer including a first catalyst material, downstream of the first application of ozone and/or ultraviolet light; and
removing ozone through a second catalyst layer including a second catalyst material downstream of the first catalyst layer; and
exhausting treated air from the air treatment apparatus; and
the self-cleaning mode including:
causing air flow through the air treatment apparatus at a second flow rate that is less than the first flow rate, the second flow rate being a non-zero flow rate;
oxidizing or inactivating contaminants via the first catalyst material; and
removing ozone via the second catalyst material.