- 专利标题: END OF SERVICE LIFE INDICATING SYSTEMS FOR LAYERED FILTER CARTRIDGES
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申请号: EP12858517.1申请日: 2012-12-04
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公开(公告)号: EP2790812B1公开(公告)日: 2018-11-14
- 发明人: FRANKEL, Kevin A. , ZELINSKY, Maria L.
- 申请人: 3M Innovative Properties Company
- 申请人地址: 3M Center P.O.Box 33427 St. Paul, MN 55133-3427 US
- 专利权人: 3M Innovative Properties Company
- 当前专利权人: 3M Innovative Properties Company
- 当前专利权人地址: 3M Center P.O.Box 33427 St. Paul, MN 55133-3427 US
- 代理机构: Herzog, Fiesser & Partner Patentanwälte PartG mbB
- 优先权: US201161569342P 20111212
- 国际公布: WO2013090052 20130620
- 主分类号: B01D53/75
- IPC分类号: B01D53/75 ; B01D46/42 ; B01D46/12 ; B01D53/02 ; B01D35/143 ; B01D53/30
摘要:
Layered filtered cartridge systems with an End of Service Life Indicating system include a filter cartridge that includes filter media. The filter media includes a multi-layer construction, of a first sorbent layer, a second sorbent layer, and a sensing element adjacent to the first and second sorbent layers such that an indicating element of the sensing element is located at the interface between the first and second sorbent layers. The second sorbent layer has a higher adsorption capacity and/or higher adsorption rate than the first sorbent layer. The sensing element indicates the passage of an adsorption wavefront through the filter cartridge.
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