US 12,274,969 B2
Vehicle cabin filter assembly
Daniela Stiehler, Gloucester (GB); James Sebastian Harding, Swindon (GB); and Timothy James Godfrey, Bristol (GB)
Assigned to Dyson Technology Limited, Malmesbury (GB)
Appl. No. 17/258,004
Filed by Dyson Technology Limited, Wiltshire (GB)
PCT Filed Jul. 5, 2019, PCT No. PCT/GB2019/051909
§ 371(c)(1), (2) Date Jan. 5, 2021,
PCT Pub. No. WO2020/008210, PCT Pub. Date Jan. 9, 2020.
Claims priority of application No. 1811156 (GB), filed on Jul. 6, 2018.
Prior Publication US 2021/0275955 A1, Sep. 9, 2021
Int. Cl. B01D 46/64 (2022.01); B01D 46/00 (2022.01); B01D 46/52 (2006.01); B60H 3/06 (2006.01)
CPC B01D 46/64 (2022.01) [B01D 46/0036 (2013.01); B01D 46/522 (2013.01); B60H 3/0658 (2013.01); B01D 2267/40 (2013.01); B01D 2279/50 (2013.01); B60H 2003/0691 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A vehicle cabin filter assembly comprising:
a housing; and
a plurality of separate filter modules mounted to the housing, comprising a first filter module, a second filter module, and a third filter module;
wherein the second filter module is positioned inside the housing downstream of the first filter module, and a third filter module is positioned inside the housing downstream of the second filter module;
wherein each of the first, second, and third filter modules respectively comprise a particulate filter element;
wherein the particulate filter element of the second filter module has a particulate separation efficiency higher than the particulate filer element of the first filter module, and the particulate filter element of the third filter module has a particulate separation efficiency higher than that of the particulate filter element of the second filter module;
wherein at least one of the first, second and third filter modules further comprises a gas filter element; and
wherein the one of the first, second, and third modules that comprises the gas filter element further comprises a second particulate filter element, and the particulate filter element of the module that comprises the gas filter element is positioned upstream of the gas filter element, and the second particulate filter element is positioned downstream of the gas filter element, and the second particulate filter element has a separation efficiency higher than the particulate filter element of the module that comprises the gas filter element.