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WO2008128305A1 - Procédé amélioré de décontamination et/ou de désodorisation des systèmes de conditionnement d'air et systèmes de couverture et dispositif de couverture correspondant - Google Patents

Procédé amélioré de décontamination et/ou de désodorisation des systèmes de conditionnement d'air et systèmes de couverture et dispositif de couverture correspondant Download PDF

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Publication number
WO2008128305A1
WO2008128305A1 PCT/BE2008/000028 BE2008000028W WO2008128305A1 WO 2008128305 A1 WO2008128305 A1 WO 2008128305A1 BE 2008000028 W BE2008000028 W BE 2008000028W WO 2008128305 A1 WO2008128305 A1 WO 2008128305A1
Authority
WO
WIPO (PCT)
Prior art keywords
air conditioning
conditioning system
cover
deodorizing
decontaminating
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/BE2008/000028
Other languages
English (en)
Inventor
Koen Jan Lieven De Koster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
METATECTA NV
Original Assignee
METATECTA NV
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 METATECTA NV filed Critical METATECTA NV
Publication of WO2008128305A1 publication Critical patent/WO2008128305A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • 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
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
    • A61L2/22—Phase substances, e.g. smokes, aerosols or sprayed or atomised substances
    • 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
    • A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0327—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid the fluid being in the form of a mist
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/22—Cleaning ducts or apparatus

Definitions

  • the present invention concerns a method for decontaminating and/or deodorizing an air conditioning system.
  • the invention provides solutions to neutralize the most resistant viruses, bacteria, fungi, spores and unpleasant smelling molecules in an air conditioning system, for example in an air duct of an airco or evaporation system or in a standalone airco unit.
  • a disadvantage to the use of biocides is that the operating environment of the air duct of for example the airco or evaporation system must be cleared so as not to expose anyone to these toxic or irritating biocides.
  • Adenosine triphosphate is the basic fuel of all living organisms and thus it is found in all micro-organisms.
  • the test consists in measuring the enzyme of the firefly, named luciferase or luciferine.
  • This metabolite is in fact a chemical fingerprint which makes it possible to measure the amount of micro-organisms that are present by means of a linear relationship between the measured luminosity and the ATP concentration.
  • RLU Relative Light Units
  • Table 1 illustrates the relation between said two units.
  • the present invention describes a method which aims to disinfect or deodorize air conditioning systems such as air ducts of for example airco or evaporation systems in a fast and efficient manner and to remedy one or several of the above-mentioned and other disadvantages.
  • the invention concerns a method for decontaminating and/or deodorizing an air conditioning system which is provided with at least two openings, whereby the method consists in connecting one opening by means of a cover to an atomizer for atomizing biocidal or deodorizing components in the form of an aerosol in the air conditioning system, and in connecting another opening to an aspirator to gradually suck in the aerosol, and in hermetically sealing the remaining openings, whereby the cover is formed of a membrane which is permeable to air but which forms a barrier to the atomized components.
  • An advantage of this method is that, thanks to the gradual decontamination and/or deodorization by the atomizing of active components, every source of contamination and smell, wherever in the air conditioning system concerned, is neutralized.
  • a major additional advantage is that, thanks to this method for disinfecting and/or deodorizing an air conditioning system such as for example the air duct of an airco or evaporation system, the operational environment must not be entirely sealed and any persons present may continue their work, which is only advantageous to the economy.
  • Another advantage is that the method makes it possible to disinfect and/or to deodorize in a relatively fast and efficient manner. Measurements have pointed out, for example, that after a maximum period of operation of 30 minutes of the method according to the present invention, a log 7 reduction, i.e. a factor of 10 million of less dangerous germs such as Clostridium Difficile and Methicilline-resistant Staphylococcus aureus (MRSA) , is obtained.
  • MRSA Methicilline-resistant Staphylococcus aureus
  • the method according to the present invention for decontamination preferably makes use of an aerosol which consists of some 97% of osmosed water (H 2 O) and, as active components, 3% hydrogen peroxide (H 2 O 2 ), 0.006% silver ions (Ag + ) and less than 0.001% organic phosphate.
  • H 2 O osmosed water
  • H 2 O 2 hydrogen peroxide
  • Ag + silver ions
  • This decontaminant is advantageous in that not only the germ load is lowered by atomizing an H20 2 solution, but in that it guarantees a germ-restraining / germ-resistant effect in the long term.
  • the active components thank their efficiency to the oxidizing effect of H 2 O 2 and the oligodynamic effect of the silver ions.
  • This oxidizing operation implies that H 2 O 2 penetrates into the spores and bacterial cell walls of micro-organisms by means of oxidation into the intracellular matrix and oxidizing proteins, DNA and other cellular components, resulting in their destruction.
  • the silver ions have a triple antimicrobial effect: they react with proteins and enzymes that are important to the bacterial energy production as well as to the transport of major particles through the cell membrane and into the cell. They inhibit the cell division through the interaction with DNA and they connect to the cell wall and lead to lysis.
  • An additional advantage is that the silver ions, in the shape of nano particles that are present, have a bacteriostatic remenant effect which stops recontamination in the near future, and in that the small fraction of organic phosphates have an anti-corrosive effect. Thanks to the extremely low concentration of Ag + (0.1 times the tolerated amount in drinking water) , these active components are moreover completely harmless to man. A mist formed of less than 5% of H 2 O 2 is not considered to be dangerous either.
  • a neutral, non-allergenic, odoriferous liquid based on surfactants for the aerosol use is preferably made of a neutral, non-allergenic, odoriferous liquid based on surfactants for the aerosol.
  • surfactants seek out oily molecules, such as petroleum (having a high viscosity) and isolate them and make them heavier by forming a micelle. This micelle reduces the surface tension of said oily molecule, resulting in neutralization.
  • organic odour molecules may be neutralized.
  • the aerosol deodorizes air conditioning systems such as air ducts of for example an airco or evaporation system and then deposits on the inner surfaces, which results in a deodorizing effect. Preference is hereby given to substances that are being slowly released, working for several days and producing a delicate perfume.
  • the method according to the present invention preferably makes use of a cover that is entirely or partly made of Tyvek®.
  • Tyvek® is a material made of polyethylene fibres with a high density, letting water gas and air through, but not the active components that are used in the aerosol.
  • the invention also concerns a cover that can be applied with the method as described above.
  • figure 1 illustrates the method schematically and seen in perspective, as applied to an air conditioning system in the form of an air duct
  • figure 2 illustrates the method schematically and seen in perspective, as applied to an air conditioning system with branches .
  • a preferred method for decontaminating and/or deodorizing an air conditioning system is illustrated by means of figure 1 and consists in connecting an air conditioning system 1 having at least two openings 2 to an atomizer 4 by means of a cover 3 in order to atomize biocidal or deodorizing components in the form of an aerosol into the air conditioning system 1, in connecting another opening 2 to an aspirator 5 to gradually suck in the aerosol, and in hermetically sealing the remaining openings 2.
  • FIG. 1 shows that the cover 3 has connectors 6 which entirely encompass the opening 2, as well as a flanged joint 7 which is connected to the atomizer 4.
  • the cover 3 is partly formed of a membrane 8 which is permeable to air but which forms a barrier to the atomized components 5.
  • the atomizer 4 which is used in the method according to the invention is of a known type.
  • the atomizer 4 is provided with a venturi nozzle or throttle valve, a connector for an air-tight coupling to the flanged joint 7 of the cover 3, a liquid reservoir and an air compressor with adjustable pressure.
  • the atomizer 4 may possibly be provided with two venturi nozzles.
  • the atomizer 4 may be extendable in height and be provided on a frame with wheels .
  • venturi nozzle or the throttle valve of the atomizer 4 can make the size of the active components in the aerosol vary.
  • the desired size of the active components in the method according to the invention is situated between 3 and 10 ⁇ m.
  • active components would not float long enough in the aerosol and would deposit too quickly. However, when the active components are smaller than 3 ⁇ m, we can no longer speak of an aerosol, but of a gas, whereby the components stay floating too long and consequently do not make contact with the bio film that is present.
  • active components having a size between 5 and 10 ⁇ m are atomized.
  • the method further consists in making the atomizer 4 atomize for a sufficiently long time in order to make a sufficient amount of aerosol enter the air conditioning system 1, which may be sucked in by the aspirator 5 immediately or after a certain while, such that the aerosol gradually spreads over the air conditioning system 1.
  • a sample 9 is preferably taken before and after the decontamination, such that it is possible to establish whether the required degree of decontamination has been reached.
  • the method is repeated.
  • it will be measured preferably also after the decontamination how much ppm of H 2 O 2 there is still present in the air duct so as to check when the environment of the air conditioning system 1 is safe after the H 2 O 2 has been disintegrated.
  • H 2 O 2 disintegrates in H 2 O and O 2 within a timespan of two hours.
  • the air conditioning system consists of an air duct with only one section, but it is clear that the air conditioning system 1 may consist of several sections, for example for several offices or partial spaces, as illustrated in figure 2.
  • the method according to the invention then consists in mutually sealing these sections by means of sealing means before carrying out the treatment according to the method and successively treating the sections.
  • the principle of the method according to the invention is the same.
  • the outer coffer casing is hereby preferably cleaned and disinfected first, after which the atomizer 4 is connected to the coffer casing by means of the cover 3.
  • the aspirator 5 is in that case situated inside the inner airco unit.
  • the aspirator can suck in during 1 minute, which implies that the inner airco unit is switched on.
  • the atomizer 4 is then disconnected from the cover 3.
  • the active components can do their work for a certain period as the membrane 8 prevents the active components from escaping.
  • Samples 9 are preferably taken to evaluate the degree of decontamination .

Landscapes

  • Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

L'invention porte sur un procédé de décontamination et/ou de désodorisation pour un système de conditionnement d'air (1) comportant au moins deux ouvertures (2), ledit procédé étant caractérisé en ce qu'il consiste à relier une ouverture (2) par l'intermédiaire d'un dispositif de couverture (3) à un pulvérisateur (4) dans le but de pulvériser des composants biocides ou désodorisants sous forme d'aérosol dans la conduite d'air (1) et à relier une autre ouverture (2) à un aspirateur (5) pour aspirer progressivement l'aérosol, et à sceller hermétiquement les ouvertures restantes (2), le dispositif de couverture (3) étant en partie constitué d'une membrane (8) perméable à l'air mais formant barrière aux composants pulvérisés.
PCT/BE2008/000028 2007-04-19 2008-04-17 Procédé amélioré de décontamination et/ou de désodorisation des systèmes de conditionnement d'air et systèmes de couverture et dispositif de couverture correspondant Ceased WO2008128305A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2007/0190A BE1017561A3 (nl) 2007-04-19 2007-04-19 Verbeterde werkwijze voor de decontaminatie en/of desodorisatie van luchtbehandelingsinstallatie en daarbij toegepaste hoes.
BE2007/0190 2007-04-19

Publications (1)

Publication Number Publication Date
WO2008128305A1 true WO2008128305A1 (fr) 2008-10-30

Family

ID=38922785

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BE2008/000028 Ceased WO2008128305A1 (fr) 2007-04-19 2008-04-17 Procédé amélioré de décontamination et/ou de désodorisation des systèmes de conditionnement d'air et systèmes de couverture et dispositif de couverture correspondant

Country Status (2)

Country Link
BE (1) BE1017561A3 (fr)
WO (1) WO2008128305A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2329893A1 (fr) * 2009-12-02 2011-06-08 Metatecta, naamloze vennootschap Procédé pour le nettoyage microbiologique d'un espace intérieur
WO2021160780A1 (fr) * 2020-02-14 2021-08-19 Gyoeri Tamas Dispositif et procédé de désinfection de canaux de fluide et utilisation du dispositif
IT202000013234A1 (it) * 2020-06-04 2021-12-04 Leonardo Mormandi Metodo di sanificazione e disinfezione di aria e ambienti

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT391934B (de) * 1985-12-11 1990-12-27 Leopold Harald Entkeimungsgeraet fuer luftkanaele, rohre u.dgl.
US5536356A (en) * 1994-04-12 1996-07-16 Clean Room Products, Inc. Apparatus and method for fabricating breather bags
DE20110307U1 (de) * 2001-02-24 2001-12-20 Clemens, Karl-Heinz, 47929 Grefrath Vorrichtung zur Hygienisierung und zur Beseitigung von Bakterien und Keimen in Rohrleitungen,Kanälen und Behältern
US20030024552A1 (en) * 2000-03-29 2003-02-06 M.T. System Co., Ltd. Air conditioner cleaning device and method for cleaning an air conditioner
EP1647780A1 (fr) * 2004-10-15 2006-04-19 Griggio, Francesco Procédé pour reconditionner des conduits de ventilation
WO2007014435A1 (fr) * 2005-08-04 2007-02-08 Saban Ventures Pty Limited Aérosol amélioré

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT391934B (de) * 1985-12-11 1990-12-27 Leopold Harald Entkeimungsgeraet fuer luftkanaele, rohre u.dgl.
US5536356A (en) * 1994-04-12 1996-07-16 Clean Room Products, Inc. Apparatus and method for fabricating breather bags
US20030024552A1 (en) * 2000-03-29 2003-02-06 M.T. System Co., Ltd. Air conditioner cleaning device and method for cleaning an air conditioner
DE20110307U1 (de) * 2001-02-24 2001-12-20 Clemens, Karl-Heinz, 47929 Grefrath Vorrichtung zur Hygienisierung und zur Beseitigung von Bakterien und Keimen in Rohrleitungen,Kanälen und Behältern
EP1647780A1 (fr) * 2004-10-15 2006-04-19 Griggio, Francesco Procédé pour reconditionner des conduits de ventilation
WO2007014435A1 (fr) * 2005-08-04 2007-02-08 Saban Ventures Pty Limited Aérosol amélioré

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2329893A1 (fr) * 2009-12-02 2011-06-08 Metatecta, naamloze vennootschap Procédé pour le nettoyage microbiologique d'un espace intérieur
BE1019057A3 (nl) * 2009-12-02 2012-02-07 Metatecta Nv Werkwijze voor het microbiologisch reinigen van een binnenruimte.
EP3042726A1 (fr) * 2009-12-02 2016-07-13 METATECTA, naamloze vennootschap Procédé pour le nettoyage microbiologique d'un espace intérieur
WO2021160780A1 (fr) * 2020-02-14 2021-08-19 Gyoeri Tamas Dispositif et procédé de désinfection de canaux de fluide et utilisation du dispositif
IT202000013234A1 (it) * 2020-06-04 2021-12-04 Leonardo Mormandi Metodo di sanificazione e disinfezione di aria e ambienti

Also Published As

Publication number Publication date
BE1017561A3 (nl) 2008-12-02

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