US 12,263,361 B2
Wearable air purifier
Philip Stephen Darling, Bristol (GB); Matthew Jerome Jennings, Bristol (GB); and Peter Knight Reid, Swindon (GB)
Assigned to Dyson Technology Limited, Wiltshire (GB)
Appl. No. 17/262,602
Filed by Dyson Technology Limited, Wiltshire (GB)
PCT Filed Jul. 11, 2019, PCT No. PCT/GB2019/051940
§ 371(c)(1), (2) Date Jan. 22, 2021,
PCT Pub. No. WO2020/021232, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 1811997 (GB), filed on Jul. 23, 2018.
Prior Publication US 2021/0260415 A1, Aug. 26, 2021
Int. Cl. A62B 18/00 (2006.01); A62B 18/08 (2006.01); A62B 23/02 (2006.01); B01D 46/00 (2022.01); B01D 46/58 (2022.01); G10K 11/178 (2006.01); H04R 1/10 (2006.01)
CPC A62B 18/003 (2013.01) [A62B 18/006 (2013.01); A62B 18/08 (2013.01); A62B 18/084 (2013.01); A62B 23/02 (2013.01); B01D 46/0045 (2013.01); B01D 46/58 (2022.01); G10K 11/17881 (2018.01); H04R 1/1008 (2013.01); H04R 1/1041 (2013.01); H04R 1/105 (2013.01); H04R 1/1075 (2013.01); B01D 2279/40 (2013.01); B01D 2279/45 (2013.01); G10K 2210/1081 (2013.01); G10K 2210/3026 (2013.01); G10K 2210/3027 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A head wearable air purifier comprising:
a first speaker assembly arranged to be worn over a first ear of a user and a second speaker assembly arranged to be worn over a second ear of the user, wherein the first speaker assembly comprises a speaker housing, the speaker housing encompassing a speaker, a filter assembly, a motor-driven impeller for creating an airflow through the filter assembly, and an air outlet downstream from the filter assembly for emitting a filtered airflow from the first speaker assembly, wherein the motor-driven impeller has a tip diameter of no less than 20 mm;
a nozzle arranged to receive the filtered airflow from the first speaker assembly, the nozzle comprising an air outlet arranged to emit the received filtered airflow from the head wearable air purifier;
an outlet duct configured to connect the nozzle to the air outlet of the first speaker assembly, wherein the outlet duct is configured to revolve relative to the speaker housing of the first speaker assembly between a first position and a second position, wherein the outlet duct is aligned with and connected to the air outlet of the first speaker assembly when in the first position, and wherein the outlet duct is connected to the first speaker assembly and is offset and disconnected from the air outlet of the first speaker assembly when in the second position; and
a control circuit arranged to control a rotational speed of the motor-driven impeller of the first speaker assembly such that a maximum rotational speed of the motor-driven impeller is from 9,000 to 18,000 RPM.