Air filter for fuel cell vehicle

Patent metadata

Field	Value
Publication number	US-2017239604-A1
Application number	US-201615346894-A
Country	US
Kind code	A1
Filing date	Nov 9, 2016
Priority date	Feb 22, 2016
Publication date	Aug 24, 2017
Grant date	—

Abstract

An air filter for a fuel cell vehicle may include a first filtration layer formed in a two-layered dust holding structure, a gas adsorption layer formed of amorphous activated carbon, a second filtration layer having amorphous pores formed therein, and a cover layer for maintaining a physical form of the air filter.

First claim

What is claimed is:

1 . An air filter for fuel cell vehicles, comprising:
a first filtration layer formed in a two-layered dust holding structure; a gas adsorption layer formed of amorphous activated carbon; a second filtration layer having amorphous pores formed therein; and a cover layer for maintaining a physical form of the air filter.

2 . The air filter of claim 1 , wherein the gas adsorption layer comprises binders formed between the gas adsorption layer and the first filtration layer and between the gas adsorption layer and the second filtration layer.

3 . The air filter of claim 1 , wherein the second filtration layer is made up of long fibers of polypropylene.

4 . The air filter of claim 3 , wherein the long fibers are made up of fibers having a diameter of about 5 to 150 μm.

5 . The air filter of claim 1 , wherein pores of the second filtration layer are formed to have a dimension of about 10 to 100 μm.

6 . The air filter of claim 2 , wherein the binders of the gas adsorption layer are configured in the form of a spider's web.

7 . The air filter of claim 1 , wherein the first filtration layer is formed in such a manner that short fibers having a first diameter range and a second diameter range form upper and lower layers, respectively.

8 . The air filter of claim 7 , wherein the first filtration layer comprises polyethylene terephthalate.

9 . The air filter of claim 7 , wherein the lower layer of the first filtration layer comprises fibers having a diameter of about 5 to 20 μm.

10 . The air filter of claim 7 , wherein the upper layer of the first filtration layer comprises fibers having a diameter of about 20 to 150 μm.

11 . The air filter of claim 7 , wherein the lower layer of the first filtration layer is formed with amorphous pores having a diameter of about 0.5 to 20 μm.

12 . The air filter of claim 7 , wherein the upper layer of the first filtration layer is formed with amorphous pores having a diameter of about 20 to 200 μm.

13 . The air filter of claim 7 , wherein the upper and lower layers of the first filtration layer are formed in such a manner that a ratio of thickness of the upper layer to that of the lower layer is 9:1.

14 . The air filter of claim 7 , wherein the upper and lower layers of the first filtration layer are bonded to physically contact with each other.

15 . A method of manufacturing an air filter for fuel cell vehicles, comprising steps of:
making a first filtration layer formed in a two-layered dust holding structure by a dry-laid nonwoven process; making a gas adsorption layer formed of amorphous activated carbon by a scattering process; making a second filtration layer having amorphous pores formed therein due to binding of fibers by a melt blown process; and making a cover layer for maintaining a physical form of the air filter by a spunbond process.

16 . A method of operating an air filter for fuel cell vehicles, comprising steps of:
removing primarily dust contained in the air introduced from the outside in a first filtration layer formed in a two-layered dust holding structure; adsorbing gas which was not removed in the first filtration layer in a gas adsorption layer formed of amorphous activated carbon; and removing fine dust particles in the air passed through the gas adsorption layer in a second filtration layer having amorphous pores formed therein.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Baek Sang-Cheol
• Jung Chan-Jung

Classifications

• B01D2239/083

  Binders between layers of the filter · CPC title

• B01D39/1623

  of synthetic origin · CPC title

• B01D2239/1233

  Fibre diameter · CPC title

• B01D46/0036 Primary

  by adsorption or absorption · CPC title

• B01D46/0001

  Making filtering elements · CPC title