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US 2026/0295491 A1Published application
High efficiency air filter body
AssigneeCorning Incorporated
InventorsThorsten Rolf Boger, Ryoko Chijiiwa
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Abstract
Particulate filters comprising a honeycomb structure for cabin air filtration. The honeycomb-structured particulate filter body has a low L/D ratio, high cell density, thin cell wall, high porosity, large median pore diameter, and preferably short plugs and optional deposited material disposed in the honeycomb structure.
Claims27
A particulate filter body comprising:
- a honeycomb structure comprised of a matrix of intersecting porous cell walls extending in an axial direction between an inlet end and an outlet end and forming a plurality of cells comprising wall surfaces which define axial channels;
- wherein a length L of the honeycomb structure extends from the inlet end to the outlet end;
- wherein a transverse area A of the honeycomb structure at the inlet end which is perpendicular to the axial direction has an equivalent diameter Deq=2×A/π;
- wherein the honeycomb structure has an L/Deq ratio of less than 0.30;
- wherein the honeycomb body comprises a cell density greater than or equal to 250 cpsi;
- and
- wherein the porous cell walls have an average thickness of less than or equal to 7.0 mil, a median pore diameter D50 of greater than 10.0 μm, and an average porosity of greater than 50%.
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A method of filtering cabin air of a vehicle, the method comprising:
- forcing air through a honeycomb-structured filter body, the filter body comprising a honeycomb structure comprised of a matrix of intersecting porous cell walls extending in an axial direction between an inlet end and an outlet end and forming a plurality of cells comprising wall surfaces which define axial channels;
- wherein a length L of the honeycomb structure extends from the inlet end to the outlet end;
- wherein a transverse area A of the honeycomb structure at the inlet end which is perpendicular to the axial direction has an equivalent diameter Deq=2×A/π;
- wherein the honeycomb structure has an L/Deq ratio of less than 0.30;
- wherein the honeycomb body comprises a cell density greater than 200 cpsi;
- and
- wherein the porous cell walls have an average thickness of less than or equal to 7.0 mil, a median pore diameter D50 of greater than 10 μm, and an average porosity of greater than 50%.
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Dependencies are inferred from the claim text.