# US 10,369,511 B2 · Filter element and gas purification device comprising a filter element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,369,511 B2 - Document ID: US10369511B2 - Status: Granted - Kind: B2 - Application number: 15/533,393 - Filed: 2015-12-16 - Published: 2018-01-04 - Granted: 2019-08-06 - Earliest claimed: 2014-12-17 - Assignees: Koninklijke Philips N.V. - Applicants: Koninklijke Philips N.V. - Inventors: Shuang Chen; Weizhong Chen - Web page: https://patentgrep.com/patent/US10369511B2 ## CPC - B01D 53/0454: {Controlling adsorption (controlling temperature swing adsorption B01D53/0462, controlling pressure swing adsorption B01D53/047)} - B01D 53/02: by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} - B01D 53/04: with stationary adsorbents {(B01D53/025 takes precedence)} - B01D 2253/25: Coated, impregnated or composite adsorbents - B01D 2253/304: Linear dimensions, e.g. particle shape, diameter - B01D 2253/3425: Honeycomb shape - B01D 2258/06: Polluted air - B01D 2259/40092: using hot liquid - B01D 2259/4508: for cleaning air in buildings - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract A filter element (1) for use in a gas purification device (100) is disclosed. It comprises a substrate (10) and a filter layer (20) covering an exterior surface of the substrate (10). The substrate (10) comprises material for containing chemicals (30) effective to remove gas pollutants from a gas. The material of the filter layer (20) is hydrophilic to adsorb liquid solution adsorbents effective in removing gas pollutants from a gas, and the exterior surface of the substrate (10) covered by the filter layer (20) is hydrophobic. ## Claims ### Claim 1 A filter element for use in a gas purification device, comprising: a substrate; and a filter layer covering an exterior surface of the substrate, wherein the filter layer comprises material for containing chemicals effective to remove gas pollutants from a gas, wherein the material of the filter layer is hydrophilic to adsorb liquid solution adsorbents effective in removing gas pollutants from a gas, further wherein the material of the filter layer comprises Tris(hydroxylmethyl)amino-methane and wherein the exterior surface of the substrate covered by the filter layer is hydrophobic. ### Claim 2 (depends on 1) The filter element according to claim 1, wherein the substrate comprises a plurality of channels, and wherein the filter layer covers at least a portion of the exterior surface of the substrate in the channels. ### Claim 3 (depends on 2) The filter element according to claim 2, wherein the substrate has a honeycomb appearance by virtue of at least a portion of the channels having a hexagonal outline. ### Claim 4 (depends on 2) The filter element according to claim 2, wherein the channels are non-straight channels, or channels different from straight channels, extending in a single longitudinal direction. ### Claim 5 (depends on 1) The filter element according to claim 1, wherein the substrate is entirely made of hydrophobic material. ### Claim 6 (depends on 1) A device for purifying a gas, comprising a filter element according to claim 1, and means for realizing a flow of the gas along the filter layer of the filter element during operation. ### Claim 7 (depends on 6) The device according to claim 6, wherein the filter element is removably arranged in the device. ### Claim 8 A filter element for use in a gas purification device, comprising: a substrate; and a filter layer covering an exterior surface of the substrate, wherein the filter layer comprises material for containing chemicals effective to remove gas pollutants from a gas, wherein the material of the filter layer is hydrophilic to adsorb liquid solution adsorbents effective in removing gas pollutants from a gas, wherein the exterior surface of the substrate covered by the filter layer is hydrophobic, and further wherein the substrate comprises a hydrophilic material such that only its exterior surface is hydrophobic. ### Claim 9 (depends on 8) The filter element according to claim 8, wherein the material of the filter layer comprises Tris(hydroxylmethyl)amino-methane. ### Claim 10 (depends on 8) The filter element according to claim 8, wherein the filter layer comprises a hydrophilic polymer. ### Claim 11 (depends on 8) The filter element according to claim 8, wherein the substrate comprises a plurality of channels, and wherein the filter layer covers at least a portion of the exterior surface of the substrate in the channels. ### Claim 12 (depends on 11) The filter element according to claim 11, wherein the substrate has a honeycomb appearance by virtue of at least a portion of the channels having a hexagonal outline. ### Claim 13 (depends on 8) A device for purifying a gas, comprising a filter element according to claim 8, and means for realizing a flow of the gas along the filter layer of the filter element during operation. ### Claim 14 A device for purifying a gas, comprising: a filter element that comprises a substrate and a filter layer covering an exterior surface of the substrate, wherein the filter layer comprises material for containing chemicals effective to remove gas pollutants from a gas, wherein the material of the filter layer is hydrophilic to adsorb liquid solution adsorbents effective in removing gas pollutants from a gas, and wherein the exterior surface of the substrate covered by the filter layer is hydrophobic; means for realizing a flow of the gas along the filter layer of the filter element during operation; and means for indicating information regarding an effective lifetime of the filter layer of the filter element to a user. ### Claim 15 (depends on 14) The device for purifying a gas according to claim 14, wherein the filter element is removably arranged in the device. ### Claim 16 A device for purifying a gas, comprising: a filter element that comprises a substrate and a filter layer covering an exterior surface of the substrate, wherein the filter layer comprises material for containing chemicals effective to remove gas pollutants from a gas, wherein the material of the filter layer is hydrophilic to adsorb liquid solution adsorbents effective in removing gas pollutants from a gas, and wherein the exterior surface of the substrate covered by the filter layer is hydrophobic; means for realizing a flow of the gas along the filter layer of the filter element during operation; and a spraying arrangement for spraying a liquid on at least a portion of the filter layer of the filter element. ### Claim 17 (depends on 16) The device according to claim 16, further comprising a tank for containing liquid chemicals, wherein the spraying arrangement is connected to the tank. ### Claim 18 (depends on 16) The device according to claim 16, further comprising a timer for activating the spraying arrangement at a predetermined interval frequency. ### Claim 19 (depends on 16) The device according to claim 16, further comprising means for detecting an effectiveness of the gas purifying process, and for controlling the spraying arrangement to activate in response to a detection of the effectiveness below a predetermined reference value. ### Claim 20 (depends on 16) The device for purifying a gas according to claim 16, wherein the filter element is removably arranged in the device.