Filter cartridge for an air purifier

Patent metadata

Field	Value
Publication number	US-9427486-B2
Application number	US-201414317719-A
Country	US
Kind code	B2
Filing date	Jun 27, 2014
Priority date	Jun 28, 2013
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

Provided is a filter cartridge for an air purifier, comprising a structure ensuring the retention of a filter medium, the filter medium comprising a standard absorbent material chosen from the group consisting of activated charcoal or zeolites, and the filter medium further comprises a nanoporous specific absorbent material functionalized with probe molecules in such a way that chemical pollutants of the aldehyde type can be trapped.

First claim

The invention claimed is:

1. Filter cartridge for an air purifier comprising a structure ensuring the retention of a filter medium, the filter medium comprising a standard absorbent material chosen from the group consisting of activated charcoal or zeolites, wherein the filter medium further comprises a nanoporous specific absorbent material functionalized with probe molecules in such a way that aldehyde chemical pollutants can be trapped.

2. Filter cartridge for an air purifier as in claim 1 , wherein the specific absorbent material is manufactured by sol-gel for incorporation in a nanoporous structure of metal oxides of probe molecules capable of trapping aldehydes.

3. Filter cartridge for an air purifier as in claim 1 , wherein the probe molecule bearing a functional group capable of reacting with an aldehyde group is chosen from the group consisting of enaminones and corresponding β-diketone/amine pairs, imines, and hydrazines, or salts derived from these compounds.

4. Filter cartridge for an air purifier as in claim 1 , wherein the structure ensuring the retention of the filter medium is a rigid alveolar structure, the alveoli containing the filter medium.

5. Filter cartridge for an air purifier as in claim 1 , wherein a micro-perforated film is assembled on the upstream and downstream faces of the rigid alveolar structure.

6. Filter cartridge for an air purifier as in claim 4 , wherein a filling rate of the alveoli with filter medium is greater than 40%.

7. Filter cartridge for an air purifier as in claim 1 , wherein the specific absorbent material is in the form of granules with dimensions ranging between 0.8 and 2 mm.

8. Filter cartridge for an air purifier as in claim 7 , wherein the shape of the granules is cylindrical with a ratio L/D>1, wherein L corresponds to a length of a granule and D corresponds to a diameter of a granule.

9. Filter cartridge for an air purifier as in claim 1 , wherein the structure ensuring the retention of the filter medium is an assembly of several films on which the standard absorbent material and the specific absorbent material are impregnated/sprinkled.

10. Filter cartridge for an air purifier as in claim 1 , wherein the weight of the specific absorbent material represents between 5 and 95% of the weight of the standard absorbent material.

11. Filter cartridge for an air purifier as in claim 1 , wherein the specific surface area of the specific absorbent material ranges between 600 and 1200 m 2 g.

12. Air purifier, comprising at least one filter cartridge defined according to claim 1 .

13. Filter cartridge for an air purifier as in claim 2 , wherein the structure ensuring the retention of the filter medium is an assembly of several films on which the standard absorbent material and the specific absorbent material are impregnated/sprinkled.

14. Filter cartridge for an air purifier as in claim 3 , wherein the structure ensuring the retention of the filter medium is an assembly of several films on which the standard absorbent material and the specific absorbent material are impregnated/sprinkled.

Assignees

• Seb Sa
• Ethera

Inventors

• Soulie Jean-Pierre
• Marchal Eric
• Bigay Yves
• Chevallier Emmanuel

Classifications

• B01D53/02 Primary

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title

• B01J20/28057

  Surface area, e.g. B.E.T specific surface area · CPC title

• B01J2220/62

  In a cartridge · CPC title

• B01D2253/1124

  Metal oxides · CPC title

• B01J20/28045

  Honeycomb or cellular structures; Solid foams or sponges · CPC title