Apparatus and method for fabricating anti-microbial air filter media and anti-microbial air filter media

Patent metadata

Field	Value
Publication number	US-9427690-B2
Application number	US-201213686192-A
Country	US
Kind code	B2
Filing date	Nov 27, 2012
Priority date	May 3, 2012
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

The present disclosure relates to an antimicrobial filter medium with improved antimicrobial property and microbe capture ability wherein gaseous antimicrobial nanoparticles are uniformly coated onto the filter medium and conductive members are attached on both sides of the filter medium, and an apparatus and a method for fabricating the same.

First claim

What is claimed is:

1. An apparatus for fabricating an antimicrobial filter medium, comprising:
an antimicrobial droplet generation unit configured to generate antimicrobial droplets by hydraulic pressure spraying an antimicrobial solution in which antimicrobial nanoparticles are dispersed;
a dehumidifier unit configured to absorb and remove a solvent component of the antimicrobial droplet;
an electric heater configured to generate antimicrobial nanoparticles by removing a solvent component remaining in the antimicrobial nanoparticles discharged from the dehumidifier unit:
an antimicrobial nanoparticle coating unit configured to fabricate an antimicrobial filter medium by coating the antimicrobial nanoparticles generated by the electric heater on a filter medium; and
a conductive member coating unit configured to coat conductive members on both sides of the antimicrobial filter medium,
wherein the conductive member coating unit comprises a conductive member supply unit, an attachment support unit and a conveyor, and
wherein the conveyor is configured to transport the antimicrobial filter medium fabricated by the antimicrobial nanoparticle coating unit, the conductive member supply unit comprises a roller above and below the conveyor and is configured to supply the conductive members, and the attachment support unit is configured to attach the conductive members on both sides of the antimicrobial filter medium by pressing them.

2. The apparatus for fabricating an antimicrobial filter medium according to claim 1 , wherein the width of the conductive member is smaller than the width of the antimicrobial filter medium.

3. The apparatus for fabricating an antimicrobial filter medium according to claim 1 , wherein a high electric voltage generator is connected to a conductive member on one side of the antimicrobial filter medium, a conductive member on the other side of the antimicrobial filter medium is grounded, and wherein the high electric voltage generator is configured to supply electric power in order to apply an electric field between the conductive members.

4. The apparatus for fabricating an antimicrobial filter medium according to claim 1 , wherein the conductive member comprises one of a conductive polymer, a conductive metal filter and a conductive membrane having micropores.

5. The apparatus for fabricating an antimicrobial filter medium according to claim 1 , wherein the antimicrobial nanoparticle coating unit comprises an antimicrobial nanoparticle spray means, a filter medium and a carrier gas suction means, the antimicrobial nanoparticle spray means configured to spray the antimicrobial nanoparticles generated by the electric heater to the filter medium and the carrier gas suction means configured to suck a carrier gas introduced into the antimicrobial nanoparticle coating unit.

6. The apparatus for fabricating an antimicrobial filter medium according to claim 5 ,
wherein the antimicrobial nanoparticle spray means comprises an upper duct providing a space in which the antimicrobial nanoparticles supplied from the electric heater and the carrier gas flow, and an upper guide vane provided in the upper duct and configured to uniformly distribute gas flow in the upper duct and an upper porous plate provided in the upper duct and configured to discharge the antimicrobial nanoparticles onto the filter medium, and
wherein the carrier gas suction means comprises a lower porous plate configured to suck the carrier gas supplied from the antimicrobial nanoparticle spray means through pores, a lower duct configured to provide a space for the carrier gas supplied from the antimicrobial nanoparticle spray means, and a lower guide vane configured to uniformly distribute gas flow in the lower duct and a ventilator sucking the carrier gas in the lower duct.

7. The apparatus for fabricating an antimicrobial filter medium according to claim 1 , which further comprises an ion generation unit configured to generate ions of a particular polarity, wherein the ions generated by the ion generation unit are bound to the antimicrobial nanoparticles discharged from the electric heater so that the antimicrobial nanoparticles are charged with a particular polarity.

8. The apparatus for fabricating an antimicrobial filter medium according to claim 5 , which further comprises a filter medium transport unit configured to transport the filter medium, connected to a conveyor of the conductive member coating unit, and configured to transport the fabricated antimicrobial filter medium to the conveyor of the conductive member coating unit.

9. An apparatus for fabricating an antimicrobial filter medium, comprising:
an antimicrobial droplet generation unit configured to generate antimicrobial droplets by hydraulic pressure spraying an antimicrobial solution in which antimicrobial nanoparticles are dispersed;
a dehumidifier unit configured to absorb and remove a solvent component of the antimicrobial droplet;
an electric heater configured to generate antimicrobial nanoparticles by removing a solvent component remaining in the antimicrobial nanoparticles discharged from the dehumidifier unit:
an antimicrobial nanoparticle coating unit configured to fabricate an antimicrobial filter medium by coating the antimicrobial nanoparticles generated by the electric heater on a filter medium; and
a conductive member coating unit configured to coat conductive members on both sides of the antimicrobial filter medium,
wherein the conductive member coating unit comprises a conductive member supply unit, an attachment support unit and a conveyor, and
wherein the conveyor is configured to transport the antimicrobial filter medium fabricated by the antimicrobial nanoparticle coating unit, the conductive member supply unit comprises a roller above and below the conveyor and is configured to supply the conductive members, and the attachment support unit is configured to attach the conductive members on both sides of the antimicrobial filter medium by pressing them,
wherein an antimicrobial filter medium is fabricated by the apparatus, and
wherein a high electric voltage generator is connected to a conductive member on one side of the antimicrobial filter medium, a conductive member on the other side of the antimicrobial filter medium is grounded, and an electric field may be applied between the conductive members by supply of electric power from the high electric voltage generator.

Assignees

• Korea Inst Sci & Tech

Inventors

• Jung Jae Hee
• Bae Gwi Nam
• Kwon Bo Mi
• Hwang Gi Byoung

Classifications

• B32B2307/7145

  Rot proof, resistant to bacteria, mildew, mould, fungi · CPC title

• A01N25/00 Primary

  Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application {, e.g. seed treatment or sequential application}; Substances for reducing the noxious effect of the active ingredients to organisms other than pests · CPC title

• B32B2307/202

  Conductive · CPC title

• B32B37/24

  with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate (B32B37/15 takes precedence) · CPC title

• B01D46/0028 Primary

  provided with antibacterial or antifungal means · CPC title