Patent ID: 11883690
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Chemical engineering (Chemistry)
Classification: CPC A  B | IPC A  B

Claim 0:
1. A filtration arrangement comprising:
a filtration element; and
a housing disposed around, and retaining the filtration element therein, the housing comprising:
a first end, a second end opposite the first end, and a wall portion comprising a first surface extending between the first end and the second end and a second surface extending between the first end and the second end, wherein the first and second surfaces are not coplanar;
an outlet defined in the housing proximate the first end;
a primary inlet defined in the housing proximate the second end; and
a plurality of secondary inlets each defined by an opening in both of the first and second surfaces of the wall portion,
wherein the second surface is annular and wherein each of the secondary inlets extends in a circumferential direction greater than in a lateral direction,

wherein the first end of the housing is structured to be coupled to a main housing of a flow generating device encircling an air inlet of the flow generating device,
wherein the primary inlet and the secondary inlets are positioned and structured to communicate ambient air from a surrounding environment to the filtration element,
wherein the outlet is positioned and structured to communicate the ambient air that has passed through the filtration element from one or more of the primary inlet and secondary inlets to the air inlet of the flow generating device, and
wherein the primary inlet has a primary inlet area, wherein each of the secondary inlets have a secondary inlet area, wherein the primary inlet area is sized to be greater than or equal to a minimum area of the air inlet of the flow generating device, and wherein each of the secondary inlets are sized such that a combined area of all of the secondary inlet areas is greater than or equal to the minimum area of the air inlet of the flow generating device.