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WO2003068273A1 - Unite de desinfection d'air - Google Patents

Unite de desinfection d'air Download PDF

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Publication number
WO2003068273A1
WO2003068273A1 PCT/DK2003/000097 DK0300097W WO03068273A1 WO 2003068273 A1 WO2003068273 A1 WO 2003068273A1 DK 0300097 W DK0300097 W DK 0300097W WO 03068273 A1 WO03068273 A1 WO 03068273A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
unit
air
light source
housing
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/DK2003/000097
Other languages
English (en)
Inventor
Henrik Hendriksen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU2003208300A priority Critical patent/AU2003208300A1/en
Publication of WO2003068273A1 publication Critical patent/WO2003068273A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
    • A61L9/12—Apparatus, e.g. holders, therefor
    • A61L9/122—Apparatus, e.g. holders, therefor comprising a fan
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the present invention relates to an air disinfection unit for disinfecting and filtering air in which unit air is passed through a housing from an air inlet opening to an air outlet opening at a selectable air flow rate, where a ventilator is provided inside the housing, said ventilator providing the air flow.
  • This kind of air disinfection unit can be used in an number of places where filtering and disinfection of the air is desirable.
  • hospital areas As examples can be mentioned hospital areas, operation rooms, laboratories, areas where people with allergies are treated, clean room separation areas, air distribution systems, air sluices, areas where food items and the like are packed, inside fresh food packaging or display machines, etc.
  • the invention solves this problem by providing an air disinfection unit which is par- ticular in that a further filter of the HEPA type is provided adjacent to the light source and that the light is a UV-C light source.
  • a further filter of the HEPA type is provided adjacent to the light source and that the light is a UV-C light source.
  • UV-C light and especially around the 254 nm wavelength, is extremely effective in destroying the genetic makeup of bacteria, vira and other micro organisms. By being able to consistently and reliably expose the micro organism, bacteria and vira to UV-C light rays a very high disinfection efficiency can be attained.
  • the known disinfection devices using UV-C light sources attain a rather low watt effect on the exposure of the micro organism.
  • the traditional UV-C light bulbs/tubes with a 40 W effect effectively have 10 or 11 W used due to the installation in a moving air stream.
  • a higher effective exposure for example up to 20 W effective can be attained.
  • a HEP A filter adjacent the light source the bacteria, vira and other micro organioms get caught in the filter material.
  • the bacteria, vira or micro organism will be exposed far more reliably and consistently in comparison to what is known from the prior art. Even those bacteria, vira or micro organisms which are smaller than the mesh size of the filter unit will be sufficiently delayed during the passage of the filter material in order for the UV-C light rays to be able to destroy the organism. Consequently, a much improved performance and a consistent high efficiency of the air filtering unit is attained regardless of the air flow rate through the filtering unit.
  • the HEPA type filter is of class EU 13 or higher, equivalent to at least a filtering efficiency of 99,997 % at 0,3 nm particle size.
  • the filter class EU 13 is in accordance with the European standards for classification of filters. Class 13 filters or higher, the highest class being 17, is used in clean rooms and in nuclear installations, where an extreme air purity is desired. In hospitals and especially in environments where surgery is performed the norm is EU 12 filter quality. In the food packaging and food processing industry EU 9 filters are used.
  • filters of class 13 or higher it is assured that the micro organisms, bacteria or vira will be either caught or sufficiently delayed through the filter material, so that an efficient exposure through the radiation from the UV-C light source is attained, whereby, even at higher air flow rates, an efficient disinfection will be achieved.
  • the UV-C light source is a 40 W or more low pres- sure quarts tube which produces UV-C irradiation at a wave length of about 254 nm with an intensity of at least 120 ⁇ W/cm 2 .
  • UV-C radiation with a wave length of about 254 nm has a devastating effect on the genetic structure of the micro organisms that are caught in the filter.
  • a light source as mentioned above it is assured that the effective wattage to which the micro organisms are exposed remains high regardless of the air flow in the unit.
  • the success rate of destruction is also coupled to the intensity of the light at the exposure zone.
  • the ventilator with prefilter in its intake opening, the HEPA filter and the UV-C light source including appropriate electrical supply equipment is arranged inside a housing, where the prefilter is part of the housing surface and that only control means for controlling the fan speed of the ventilator, switching means and an electrical connecting cord is available for interface with the unit on the surface of the housing.
  • the unit becomes easy to use and operate in that the user only has to switch the unit on and select the appropriate fan speed on the control means after having plugged the unit into the available means of electrical supply. Furthermore, by designing the housing a pleasant appearance can be achieved, whereby the air disinfection unit in contrast to prior art devices can fit nicely into the environment where they are desired to operate.
  • the housing can be mounted on wheels, whereby it becomes easy to move the unit around or store it when not in use.
  • ventilators having a capacity of 150-800 m 3 /hour, more preferably 200-700 m 3 /hour and most preferred 300- 500 m 3 hour provides sufficient flow rates through the unit, whereby the unit is suitable for most applications and room sizes.
  • the ventilator's through put of air is deci- sive on the effectiveness in the prior art applications, but due to the arrangement of the HEPA filter directly adjacent to the UV-C light source the air flow as such does not have an overwhelming influence on the effectiveness of the disinfection unit.
  • an hour counter can be mounted, preferably such that the number of hours during which the unit has been in use can be read from the outside. The number of use hours is decisive for determining when the filters, both the prefilter and the main HEPA filter, need to be cleaned or replaced.
  • the unit can run for approximately 6000 hours before it is necessary to replace the
  • the prefilter which in a further advantageous embodiment is a EU class 3 filter, needs to the cleaned at shorter intervals.
  • the HEPA filter has a surface of 6-20 m 2 , preferable 8-15 m 2 and most preferred 10-12 m 2 .
  • the physical size of the filter in combination with the filter classification determines how much resistance the filter unit offers to the air flow. Tests have shown that filters in the range stated above consistently provide a steady air flow for the approximately life time of the filter, whereby the intended efficiency of disinfection of the unit will reliably be attained.
  • the HEPA filter is in the shape of a filter cartridge wherein the filter material is pleated, said filter cartridge having a cylindrical configuration and that the ventilators outlet is arranged at one end of the cylindrical filter cartridge and a mounting for the UV-C light source is arranged in the opposite end such that the light source, for example in the shape of a tube, is arranged inside the cylindrical configuration of the filter cartridge.
  • the air to be filtered is sucked into the unit by the ventilator. It is then blown down into a cylindrical hollow, limited by the pleated filter cartridge and a mounting in the opposite end of the filter cartridge for the UV-C light source.
  • a tube shaped light source as this will emit light to a large area and especially in this embodiment will expose substantially the entire interior surface of the filter.
  • the air blown down into the filter cartridge will be evacuated through the filter wall.
  • the housing of the unit will therefore have perforations, netting or other means for letting the air out in the vicinity and corresponding to the cylindrical shape and size of the filter cartridge.
  • Fig. 1 illustrates one example of the unit according to the invention.
  • Fig. 2 illustrates a typical cross-section of a unit according to the invention.
  • Fig. 3 illustrates a preferred embodiment of the invention.
  • Fig. 4 illustrates a preferred embodiment of the invention.
  • the unit 1 illustrated in fig. 1 illustrates one embodiment of the invention.
  • the unit 1 consists of a housing 2, mounted on wheels 3 such that the unit easily can be rolled across the floor.
  • the unit is shown as a circular unit being approximately 1 metres high and having a diameter of about 40 cm.
  • the unit can have any desired cross-sectional shape, for example rectangular, quadratic, triangular or any polygonal shape desired.
  • the exterior dimensions of the unit as such are determined by the physical size of the ventilator inside the unit as well as the desired filter size.
  • a control panel 4 On the outside of the unit a control panel 4, an hour counter 5 and a connecting cord 6 for connecting the unit 1 to the main supply are provided.
  • the top of the cylinder is the air inlet opening 9 where the prefilter is mounted.
  • the air outlet opening is at the opposite end of the cylinder.
  • a prefilter 10 is arranged in the air inlet opening 9 whereby dust and other larger particles can be filtered before the air to be disinfected enters the disinfection sector of the unit 1.
  • the prefilter 10 will be a filter of class EU 3 as the air flow resistance in such a filter is low in relation to its ability to withhold dust and other larger particles.
  • the ventilator 11 creates the air flow through the unit and is controlled by the control panel 4. From the ventilator 11 the air flow is directed towards the HEPA filter 12.
  • the HEPA filter is a class 13 filter with a pleated structure so that the entire filtering surface of the filter is in excess of 10 m 2 . Filters of this type can be obtained from "American Air Filters" or similar suppliers.
  • the UV-C light source 13 Immediately below the HEPA filter 12 the UV-C light source 13 is arranged.
  • the UV- C light source emits UV-C irradiation at 254 nm at 40W.
  • the filter and the UV-C light source are arranged in immediate vicinity of each other the radiation will effectively hit all bacteria, vira or micro organisms caught in the filter unit.
  • the disinfected air will thereafter leave the unit through the air outlet opening at the bottom of the housing 2.
  • a storage compartment 14 for the electrical cable 6 connecting the unit to the main supply is also arranged.
  • a roll up mechanism can be arranged inside the cable compartment 14, whereby the cable 6 can be rolled up inside the unit when not in use.
  • a unit according to a preferred embodiment is shown.
  • the same unit is illustrated in fig. 3 in a cut away view where the UV-C light source 13 can be seen mounted on the bottom plate 14 of the unit.
  • the filter unit 12 is in this example a cylindrical cartridge having a pleated structure.
  • the filter cartridge is arranged so as to surround the UV-C light source 13.
  • the unit's prefilter, ventilator and control panel is not shown in fig. 3 as fig. 3 only aims to illustrate the arrangement of the HEPA filter cartridge 12 in relation to the UV-C light source 13.
  • the UV-C light source 14 is mounted in the bottom plate 16 of the unit.
  • the light source 13 can be removed from the bottom 16 by removing the light source 13 with the fastening means 15.
  • the unit in fig. 4 has an interior where the upper half corresponds to fig. 2 and the bottom half corresponds to fig. 3.
  • the air is let in through the prefilter 9 and behind the housing 2 the installations relating to the ventilator, prefilter, control panels etc. are arranged.
  • the bottom section 17 of the housing is in this embodiment perforated or is a netting structure. This is done in order to let the air out again from the filtering unit.
  • a very effective disinfection and filtering can be achieved and at the same time the air velocity through the filter and the perforated or netting section 17 of the unit can be kept relatively low.
  • the unit 1 and in particular the prefilter 10, the HEPA filter 12 and the light source 13, are made such that all parts can easily be dismantled when cleaning, replacing og repairing. This is an added and important feature in that this type of unit is often placed in environments where an extremely high hygienic standard is desired.

Landscapes

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

Abstract

L'invention concerne une unité de désinfection d'air comprenant un préfiltre, un ventilateur, un filtre HEPA et une source de lumière UV-C. L'unité est particulièrement utile à la désinfection, la purification dans les zones hospitalières, les salles d'opération, les laboratoires, les zones où sont traitées des personnes atteintes d'allergie, les zones de séparation de salles blanches, les systèmes de distribution d'air, des vannes d'air, des zones dans lesquelles sont emballés des articles alimentaires et analogues, à l'intérieur de conditionnement ou de machines de présentation d'aliments frais, etc.
PCT/DK2003/000097 2002-02-14 2003-02-14 Unite de desinfection d'air Ceased WO2003068273A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003208300A AU2003208300A1 (en) 2002-02-14 2003-02-14 Air disinfection unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200200223 2002-02-14
DKPA200200223 2002-02-14

Publications (1)

Publication Number Publication Date
WO2003068273A1 true WO2003068273A1 (fr) 2003-08-21

Family

ID=27675527

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2003/000097 Ceased WO2003068273A1 (fr) 2002-02-14 2003-02-14 Unite de desinfection d'air

Country Status (2)

Country Link
AU (1) AU2003208300A1 (fr)
WO (1) WO2003068273A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006043124A1 (fr) * 2004-10-21 2006-04-27 Carrier Corporation Unites de ventilation
CN110387930A (zh) * 2019-06-25 2019-10-29 邹晓飞 一种智能型多功能卫生间除臭设备
GB2597254A (en) * 2020-07-16 2022-01-26 Respired Ltd Air purification device
NL2026466B1 (nl) * 2020-09-15 2022-05-16 Willem Boers Marcus Luchtdesinfectie-inrichting en werkwijze voor het desinfecteren van lucht
AT17553U1 (de) * 2020-07-28 2022-07-15 Airvent Legtechnikai Zrt Luftsterilisierende Vorrichtung
DE102021110185A1 (de) 2021-04-22 2022-10-27 Technische Universität Dresden, Körperschaft des öffentlichen Rechts Partikelfilter zur Herstellung eines Desinfektionsmittels und dessen Verwendung
US11666845B2 (en) 2020-07-17 2023-06-06 Respired Limited Air purification device
GR1010502B (el) * 2022-06-28 2023-07-07 Γεωργιος Κωνσταντινου Νικολαϊδης Νεος αποστειρωτης αερα υπεριωδους ακτινοβολιας (uvc), εστιασμενης ανακλασης και πολλαπλης περιθλασης (uvc-rfmdi) με φιλτρο ηερα μεγαλης γωνιας (wide angle hepa)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005549A1 (fr) * 1988-11-16 1990-05-31 Envair (Uk) Limited Caisson a air propre
WO1995017634A1 (fr) * 1993-12-22 1995-06-29 Klean A/S Dispositif de purification comprenant des filtres et des sources de rayons ultraviolets
WO1999024147A1 (fr) * 1996-05-20 1999-05-20 Air-A-Medic Corporation Systeme de filtration d'air
US6345510B1 (en) * 2000-11-22 2002-02-12 Joackim Shiuan Air-conditioning system
US6471582B1 (en) * 2001-08-14 2002-10-29 Applied Optoelectronics, Inc. Adapter for coupling air duct to fan-driven vent

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005549A1 (fr) * 1988-11-16 1990-05-31 Envair (Uk) Limited Caisson a air propre
WO1995017634A1 (fr) * 1993-12-22 1995-06-29 Klean A/S Dispositif de purification comprenant des filtres et des sources de rayons ultraviolets
WO1999024147A1 (fr) * 1996-05-20 1999-05-20 Air-A-Medic Corporation Systeme de filtration d'air
US6345510B1 (en) * 2000-11-22 2002-02-12 Joackim Shiuan Air-conditioning system
US6471582B1 (en) * 2001-08-14 2002-10-29 Applied Optoelectronics, Inc. Adapter for coupling air duct to fan-driven vent

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006043124A1 (fr) * 2004-10-21 2006-04-27 Carrier Corporation Unites de ventilation
CN110387930A (zh) * 2019-06-25 2019-10-29 邹晓飞 一种智能型多功能卫生间除臭设备
GB2597254A (en) * 2020-07-16 2022-01-26 Respired Ltd Air purification device
GB2597254B (en) * 2020-07-16 2022-08-03 Respired Ltd Air Purification Device
US11666845B2 (en) 2020-07-17 2023-06-06 Respired Limited Air purification device
AT17553U1 (de) * 2020-07-28 2022-07-15 Airvent Legtechnikai Zrt Luftsterilisierende Vorrichtung
NL2026466B1 (nl) * 2020-09-15 2022-05-16 Willem Boers Marcus Luchtdesinfectie-inrichting en werkwijze voor het desinfecteren van lucht
BE1028571B1 (nl) * 2020-09-15 2022-08-23 Frank Dreef Luchtdesinfectie-inrichting en werkwijze voor het desinfecteren van lucht
DE102021110185A1 (de) 2021-04-22 2022-10-27 Technische Universität Dresden, Körperschaft des öffentlichen Rechts Partikelfilter zur Herstellung eines Desinfektionsmittels und dessen Verwendung
WO2022223624A1 (fr) 2021-04-22 2022-10-27 Technische Universität Dresden Filtre à particules pour la production d'un désinfectant et son utilisation
GR1010502B (el) * 2022-06-28 2023-07-07 Γεωργιος Κωνσταντινου Νικολαϊδης Νεος αποστειρωτης αερα υπεριωδους ακτινοβολιας (uvc), εστιασμενης ανακλασης και πολλαπλης περιθλασης (uvc-rfmdi) με φιλτρο ηερα μεγαλης γωνιας (wide angle hepa)

Also Published As

Publication number Publication date
AU2003208300A1 (en) 2003-09-04

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