WO2021204976A1 - Dispositif de filtration d'air - Google Patents

Dispositif de filtration d'air Download PDF

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Publication number
WO2021204976A1
WO2021204976A1 PCT/EP2021/059244 EP2021059244W WO2021204976A1 WO 2021204976 A1 WO2021204976 A1 WO 2021204976A1 EP 2021059244 W EP2021059244 W EP 2021059244W WO 2021204976 A1 WO2021204976 A1 WO 2021204976A1
Authority
WO
WIPO (PCT)
Prior art keywords
filtration device
filters
air filtration
air
flow chamber
Prior art date
Application number
PCT/EP2021/059244
Other languages
English (en)
Inventor
William CORREIA XAVIER
Original Assignee
Wiseware, Lda.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wiseware, Lda. filed Critical Wiseware, Lda.
Publication of WO2021204976A1 publication Critical patent/WO2021204976A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/10—Respiratory apparatus with filter elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/11—Apparatus for controlling air treatment
    • A61L2209/111—Sensor means, e.g. motion, brightness, scent, contaminant sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/14—Filtering means
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements

Definitions

  • the invention relates to an air filtration device for filtering particles from air and a breathing apparatus including the air filtration device.
  • Air filtration devices with filters and UV light are known in the art.
  • US Patent No 10, 335, 618 (Zhou et al) teaches a breathing apparatus with a facemask portion sized to cover a lower portion of a wearer’s face.
  • the facemask option incudes a flow chamber having a serpentine passage disposed between a first opening and a second opening.
  • At least one light emitting diode configure to emit light having a peak wavelength in the ultraviolet range is disposed in the serpentine passage.
  • Air breathed in by the wearer of the apparatus passes through the flow chamber and is exposed to radiation emitted by the LEDs to kill pathogens in the air.
  • the breathing apparatus disclosed in this ‘618 patent requires a relatively long flow chamber with a large number of LEDs in order to ensure that most of the pathogens are killed before the air enters the mouth and lungs of the wearer. This makes the breathing apparatus large and clumsy to wear.
  • This document teaches an air filtration device comprising an air input opening and an air output opening connected to the air input opening through a flow chamber.
  • One or more UV sources are arranged in the flow chamber and illuminating the one or more filters to kill the trapped pathogens.
  • the air filtration device has at least two of the filters.
  • a first filter is disposed nearest to the air input opening and a second filter of the filters is disposed nearest to the air output opening.
  • the pores in the first filter are larger than pores in the second filter. This prevents the pores in the first filter clogging up too quickly with the particulates and pathogens.
  • the air filtration device may have at least two UV sources arranged on either side of one of the filters.
  • the air filtration device further comprises a ventilator arranged at the air input opening.
  • the ventilator can force air through the flow chamber to enable easier breathing.
  • the air filtration device includes a sensor for detecting particles in one of the filters.
  • the air filtration device can be used in a breathing apparatus or a room ventilation device.
  • Fig. 1 shows an air filtration device
  • Fig. 2 shows a facemask with the air filtration device
  • Fig. 3 shows a more detailed example of the facemask.
  • Fig. 4 shows an example of the filter used in the air filtration device.
  • FIG. 1 shows an example of an air filtration device 10 according to one aspect of the invention.
  • the air filtration device 10 comprises an air input opening 20 and an air output opening 30 connected to the air input opening 20 through a flow chamber 40. Air from the environment enters the flow chamber 40 through the air input opening 20 and is expelled through the air output opening 30.
  • the air filtration device 10 can be used in a facemask (as shown in Figs. 2 and 3) and in this case, the mouth and/or nose of a wearer will be close to the air output opening 30.
  • the air filtration device 10 is made of a medical grade plastic or rubber.
  • One or more filters 50a, 50b, 50c are arranged in the flow chamber 40 between the air input opening 20 and the air output opening 30 through which air entering the flow chamber 40 flows.
  • three filters 50a, 50b and 50c (collectively 50) are shown, but this is not limiting of the invention.
  • the three filters 50 have small pores, typically of the size between 100 nm and 20 p to trap some of the pathogens in the air, such as but not limited to viruses or bacteria.
  • the size of the pores can vary between the different ones of the filters 50 and the values given are not limiting of the invention.
  • the first filter 50a disposed nearest to the air input opening 20 can have an average pore size of 400 nm to trap larger pathogens, whereas the average pore size of the third filter 50c could have a small pore size, e.g. 10 nm to trap smaller pathogens.
  • Two UV sources 60a and 60b are arranged on a printed circuit board in the flow chamber 40 at either side of the second filter 50b.
  • the UV sources 60a and 60b illuminate the area of the filters 50 in order to kill any pathogens trapped in the filters 50 as well as any pathogens flowing through the flow chamber 40.
  • Fig. 1 only two UV sources 60a and 60b are known, but it will be appreciated that further UV sources 60 could be included.
  • the UV sources 60 will typically emit UVC light with a peak in the range of 100- 280 nm.
  • the air filtration device 10 may further include one or more optical sensors 70 for detecting particles, such as but not limited to, pollen, viruses or bacteria trapped in one or more of the filters 50.
  • the optical sensor 70 can be mounted on the same PCB board as the UV sources 60 and comprises a light source 70a emitting light at one or more wavelengths with a detector 70b for detecting the light passing through one or more of the filters 50.
  • bacteria have an intrinsic fluorescence. See Leblanc et al. “Monitoring the identify of bacteria using their intrinsic fluorescence”, FEMS Microbiology Letters, Vol. 211, Issue 2, June 2002, Pages 147-153 (downloaded from DOI 10.1111/j.l574- 6968.2002. tbll217.x).
  • the detector can determine the type and number of bacteria in the first filter 50a and/or the second filter 50b from monitoring the fluorescence light.
  • virus particles can also be monitored, as is know from Alimova et al “Virus particles monitored by fluorescence spectroscopy: a potential detection assay for macromolecular assembly”, Photochem Photobiol., July-Aug 2004; 80; 41-6 (DOI:
  • the detector 70b is adapted to monitor different wavelengths of the fluoresced light.
  • the detector will identify light at 330nm (at which the viruses fluoresce) and/or 250 nm , 270 nm or 316 nm for the identification of bacteria. Intermediate wavelengths can also be monitored. More generally it is envisaged the detector 70b could detect fluorescence spectra in the range of 280-480 nm.
  • the excitation wavelength from the light source 70a can be set at, for example, 250 nm or 316 nm. It will be appreciated that the detector 70b will incorporate a filter 75 to filter out the light at the excitation wavelengths.
  • the detector 70b is connected to a local processor 80 in the air filtration device 10 or through a wireless connection to a cloud processor to use the measured values of the fluorescence radiation in the air filtration device 10 to determine whether one or more of the filters 50 need a replacement.
  • the spectra detected by the detector 70b can also be used to determine the types of particles, for examples the types of bacteria or virus trapped in the filters 50.
  • the optical sensor 70 is able to measure the effectiveness of the UVC light from the UVC sources 60 by measuring the accumulation of the particles on the surface of the filters 50.
  • the local processor 80 can use this information in a feedback loop to adjust the amount of UVC light being emitted from the UVC sources 60 and/or indicate whether the filters (50) need to be replaced.
  • the wearer of the air filtration device 10 receives a warning when the air filtration device 10 when in a dangerous area with a high viral or bacterial load and the filters 50 are unable to filter the particles sufficiently well.
  • This warning could be sent to an app on a mobile device or a warning device 90 incorporated into the air filtration device 10
  • the air filtration device 10 may include a ventilator 60 arranged at the air input opening 20 to push or blow air through the flow chamber 40 to aid the breathing of the wearer.
  • the air filtration device can find application in a facemask 100, such as shown as being worn by a wearer in Fig. 2 and by itself in Figs 3 A and 3B.
  • Fig. 4 shows an example of one of the filters 50 that can be arranged in the flow chamber 40.
  • the filter is made a membrane material (e.g. a polyamide or polyethylene terephthalate) or glass fibre material 400 and can be coated with a graphene or graphene oxide layer 410 on one or both sides.
  • the graphene or graphene oxide layer 410 is deposited by atomic layer deposition.
  • a potential 420 of several kilovolts can be connected across the filter 50 to the graphene or graphene oxide layer 410 which kills viruses trapped in the filter 50.
  • the filters 50 can be spirally wound within the flow chamber 40 and UV sources 60 arranged along a strip through the flow chamber 40.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

Un dispositif de filtration d'air (10) pour filtrer des particules de l'air est divulgué. Le dispositif de filtration d'air (10) comprend une ouverture d'entrée d'air (20) et une ouverture de sortie d'air (30) reliée à l'ouverture d'entrée d'air (20) par une chambre d'écoulement (40). Un ou plusieurs filtres (50) sont disposés dans la chambre d'écoulement (40) et une ou plusieurs sources UV (60) sont disposées dans la chambre d'écoulement (40) et éclairent le ou les filtres (50). Un capteur (70) permet de détecter le nombre de particules dans les filtres (50) ou sur la surface des filtres (50).
PCT/EP2021/059244 2020-04-08 2021-04-08 Dispositif de filtration d'air WO2021204976A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PT20201000018094 2020-04-08
PT11624120 2020-04-08

Publications (1)

Publication Number Publication Date
WO2021204976A1 true WO2021204976A1 (fr) 2021-10-14

Family

ID=75936944

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/059244 WO2021204976A1 (fr) 2020-04-08 2021-04-08 Dispositif de filtration d'air

Country Status (1)

Country Link
WO (1) WO2021204976A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210346830A1 (en) * 2020-05-07 2021-11-11 Juan Enrique Sanchez Gil Electronic microbicidal air filter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6500387B1 (en) * 2000-05-19 2002-12-31 Nukuest, Inc. Air actinism chamber apparatus and method
WO2004011041A2 (fr) * 2002-05-20 2004-02-05 Arts Theodore A M Dispositifs de decontamination d'air
GB2428601A (en) * 2005-08-03 2007-02-07 Malcolm Robert Snowball Fluid filtration apparatus
WO2008097379A2 (fr) * 2006-10-06 2008-08-14 Steven Lyon Guth Masque respiratoire auto-stérilisant de particules et procédé pour l'utiliser
US20160097311A1 (en) * 2014-10-06 2016-04-07 Carlos Eduardo COELHO FERREIRA Filter
KR20170135588A (ko) * 2016-05-31 2017-12-08 김정학 공기정화기
US10335618B2 (en) 2014-07-03 2019-07-02 Ling Zhou Breathing apparatus with ultraviolet light emitting diode

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6500387B1 (en) * 2000-05-19 2002-12-31 Nukuest, Inc. Air actinism chamber apparatus and method
WO2004011041A2 (fr) * 2002-05-20 2004-02-05 Arts Theodore A M Dispositifs de decontamination d'air
GB2428601A (en) * 2005-08-03 2007-02-07 Malcolm Robert Snowball Fluid filtration apparatus
WO2008097379A2 (fr) * 2006-10-06 2008-08-14 Steven Lyon Guth Masque respiratoire auto-stérilisant de particules et procédé pour l'utiliser
US10335618B2 (en) 2014-07-03 2019-07-02 Ling Zhou Breathing apparatus with ultraviolet light emitting diode
US20160097311A1 (en) * 2014-10-06 2016-04-07 Carlos Eduardo COELHO FERREIRA Filter
KR20170135588A (ko) * 2016-05-31 2017-12-08 김정학 공기정화기

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ALIMOVA ET AL.: "Virus particles monitored by fluorescence spectroscopy: a potential detection assay for macromolecular assembly", PHOTOCHEM PHOTOBIOL., vol. 80, July 2004 (2004-07-01), pages 41 - 6
LEBLANC ET AL.: "Monitoring the identify of bacteria using their intrinsic fluorescence", FEMS MICROBIOLOGY LETTERS, vol. 211, June 2002 (2002-06-01), pages 147 - 153

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210346830A1 (en) * 2020-05-07 2021-11-11 Juan Enrique Sanchez Gil Electronic microbicidal air filter
US11801467B2 (en) * 2020-05-07 2023-10-31 Juan Enrique Sanchez Gil Electronic microbicidal air filter

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