US3910778A - Biological filter for the sterilization and enrichment of a gas stream with negative ions - Google Patents

Biological filter for the sterilization and enrichment of a gas stream with negative ions Download PDF

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Publication number
US3910778A
US3910778A US401156A US40115673A US3910778A US 3910778 A US3910778 A US 3910778A US 401156 A US401156 A US 401156A US 40115673 A US40115673 A US 40115673A US 3910778 A US3910778 A US 3910778A
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gas stream
electrode
biological filter
negative ions
negative
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Expired - Lifetime
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US401156A
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English (en)
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Manouchehr Shahgholi
Ali Sekhavat
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    • 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
    • A61L9/22—Ionisation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T23/00—Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere

Definitions

  • ABSTRACT A biological filter for the sterilization and enrichment of a gas stream with'negative ions, wherein said filter comprises in combination, on the path of the gas molecules and in the direction of flow of the gas, a first separating electrode which is brought to a negative potential, a second extraction electrode which is brought to a positive potential and entirely covered with electric insulating material, an ultraviolet lamp for irradiating said gas stream and a third output electrode which is brought to a negative potential.
  • This invention relates to a biological filter for the sterilization and enrichment of a gas stream with negative ions, the filter being primarily intended to be fitted in ventilation sources in order to obtain an appreciable increase in the concentration of negative ions which are present in air with respect to the concentration of positive ions.
  • the surrounding air contains a much higher proportion of positive ions than negative ions even in the zones in which the air is of high purity.
  • the processes of pollution by waste products discharged into the atmosphere from industrial sources bring about a considerable reduction in the number of negative oxygen ions which are present in the air breathed by human beings; and in some extreme cases such as the centers of large industrial towns, these negative ions are completely eliminated.
  • the recent biological studies mentioned earlier now confirm the major disadvantages which arise from these conditions.
  • the precise aim of this invention is to provide a biological filter for counteracting the disastrous effects of pollution by means of a surplus of negative ions produced within a flowing gas stream, and especially an air stream for the ventilation of residential premises.
  • Said biological filter for the sterilization and enrichment of a gas stream with negative ions is essentially characterized in that it comprises in combination, on the path of the gas molecules and in the direction of flow of the gas, a first separating electrode which is brought to a negative potential, a second extraction electrode which is brought to a positive potential and entirely covered with electric insulating material, an ultraviolet lamp for irradiating said gas stream and a third output electrode which is brought to a negative potential.
  • the first separating electrode which is brought to a negative potential with respect to the surrounding atmosphere carries out a first selection of the ions naturally contained in the gas stream to be enriched with negative ions by collecting the majority of the positive ions originally contained in said stream.
  • the second extraction electrode which is located behind the first in the direction of flow of the gas stream is positively charged and, by virtue of the field produced, consequently constitutes the accelerating electrode for the few negative ions which will have passed through the first electrode.
  • said second extraction electrode is electrically insulated over its entire surface, for example by means of a covering of plastic material of any suitable type, in order that said electrode may thus be prevented from collecting the few negative ions which pass through this latter.
  • the ultraviolet lamp which is then encountered by the gas stream on its flow path causes on the one hand bacteriological sterilization and above all very strong ionization of the neutral molecules of said gas stream and this latter is thus abundantly seeded with positive and negative ions.
  • the third output electrode is brought to a negative potential so that the positive ions produced within the gas stream by the ultraviolet lamp can be collected as they pass, there being allowed to remain only the negative ions which are then carried to the exterior by the gas stream.
  • the potential differences established between the three electrodes are not critical per se but an advantageous normal value can be within the range of 350 to 400 volts, for example, this being readily obtained by means of a domestic generator which operates from the mains supply system.
  • the main advantage of said biological filter lies in the fact that it provides an effective means of combating air pollution and the resultant destructive action on the negative ions of oxygen which are essential for maintaining life in all its forms.
  • the present invention accordingly finds a wide variety of applications in numerous fields such as science', agronomy, zoology, space technology, medicine, easthetics, food science and so forth.
  • One immediate and very important application of the biological filter in accordance with the invention consists in inserting said filter in the outlet shutter of an air conditioning ventilator of the type employed for comfort control.
  • FIG. 1 is an exploded view of a biological filter in accordance with the invention
  • FIG. 2 is a sectional view of one form of construction of the filter of FIG. 1, said filter being engaged within a flat metal casing;
  • FIG. 3 shows the application of the biological filter according to the invention to an apparatus for the production of conditioned air.
  • FIG. 1 a flat gas stream 1 which flows in the direction of the arrow F under the action of a ventilator of a type known per se (not shown), which passes successively through the first separating electrode 2, the second extraction electrode 3, the ultraviolet lamp 4 and the third output electrode 5 and is then finally discharged to the exterior for use by living beings.
  • the electrodes 2 and 5 are of conductive metal and of any desired shape although a constructional design in the form of a grid is wholly suited to the result which is sought.
  • the ultraviolet lamp has the shape of an annular tube within which the gas stream passes.
  • the second electrode or extraction electrode 3 is wholly covered with an insulating plastic sheath 6.
  • a direct-current supply source 7 of a type known per se and comprising the electronic equipment of the apparatus is adapted to carry the different electrodes 2, 3 and 5 at the desired potentials.
  • the electrode 2 is brought by means of the conductor 8 to a negative potential of 200 volts;
  • the extraction electrode 3 is brought by the conductor 9 to a positive potential of 200 volts and
  • the third extraction electrode is brought by the conductor 10 to a negative potential of 200 volts.
  • the supply unit 7 also serves to supply electric power via the conductors 11 and 12 to the ultraviolet lamp 4.
  • FIG. 1 There is shown diagrammatically in FIG. 1 by means of the signs and the relative proportion of the positive and negative ions which appear within the gas stream 1 progressively as this latter passes through the biological filter in accordance with the invention.
  • the positive ions are distinctly predominant.
  • the ionization is then much lower and essentially constituted by negative ions.
  • the third output electrode 5 retains the majority of the positive ions, with the result that the gas stream 1 is essentially seeded with negative ions as it leaves said electrode.
  • FIG. 2 shows the different elements of FIG. 1 in the real relative arrangement in which they are engaged within a flat casing 13.
  • the electrodes 2, 3 and 5 as well as the ultraviolet lamp 4 are again shown in this figure.
  • the biological filter in accordance with the invention is particularly convenient to use since the assembly is presented in the form of a plate which can thus be readily placed on the path of a gas stream in order to enrich this latter in negative ions.
  • FIG. 3 in which is shown an apparatus 14 of known type for the production of conditioned air.
  • the outlet shutter 15 of this apparatus has two guides, only one guide 16 being visible in FIG. 3, the plate 17 containing the elements of the biological filter of FIG. 2 being slidably engaged within said guides.
  • the conditioned air is impelled into the enclosure to be thermostatically controlled in a direction of fiow which is indicated by the arrow F.
  • the flow of conditioned air through said shutter 15 fitted with the generator 17 is alone sufficient to ensure substantial diffusion of negative oxygen ions within the thermostatically controlled premises, thus producing a beneficial action on living beings as already pointed out in the foregoing.
  • the invention is not limited in any sense to the different forms of construction which have been described only by way of indication and extends to all alternative forms which are within the capacity of any one versed in the art.
  • the present invention has a very broad range of application which is not limited solely to the production of conditioned air enriched with negative oxygen ions.
  • one application of particular interest is the ventilation of automobiles in which a biological filter according to the invention is placed in the ventilation circuit and thus provides passengers with the means for readily obtaining an atmosphere which is biologically pure and rich in negative oxygen ions.
  • a biological filter for the sterilization and enrichment of a gas stream with negative ions comprising on the path of the gas molecules and in the direction of flow of the gas, a first separating electrode at a negative potential V, a second extraction electrode at a positive potential +V and entirely covered with electric insulating material, an ultraviolet lamp for irradiating said gas stream, a third output electrode at a negative potential -V, the three electrodes being conductive metallic grids, the second electrode being electrically insulated from the gas stream by a covering of plastic material, the ultraviolet lamp surrounding the gas stream and the value 2V being between 350 and 400

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Electrotherapy Devices (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
US401156A 1972-10-23 1973-09-27 Biological filter for the sterilization and enrichment of a gas stream with negative ions Expired - Lifetime US3910778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7237540A FR2203644B1 (nl) 1972-10-23 1972-10-23

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US3910778A true US3910778A (en) 1975-10-07

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JP (1) JPS4975095A (nl)
FR (1) FR2203644B1 (nl)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102654A (en) * 1976-07-27 1978-07-25 Raymond Bommer Negative ionizer
US4246105A (en) * 1977-04-14 1981-01-20 Ernst Rohrer Method for the reduction of the chemical oxygen demand of water and waste water by catalytic oxidation and use of such method
US4253852A (en) * 1979-11-08 1981-03-03 Tau Systems Air purifier and ionizer
US4264343A (en) * 1979-05-18 1981-04-28 Monsanto Company Electrostatic particle collecting apparatus
US4265641A (en) * 1979-05-18 1981-05-05 Monsanto Company Method and apparatus for particle charging and particle collecting
US4757422A (en) * 1986-09-15 1988-07-12 Voyager Technologies, Inc. Dynamically balanced ionization blower
US4980796A (en) * 1988-11-17 1990-12-25 Cybergen Systems, Inc. Gas ionization system and method
US5009683A (en) * 1989-07-24 1991-04-23 Sun Shin Ching Purifying air conditioner
WO1992019377A1 (en) * 1991-04-25 1992-11-12 Micro Diagnostics Corporation Laboratory dryer with hydrophilic exhaust filter
US5215718A (en) * 1990-04-02 1993-06-01 Katzer Rodney A Laboratory dryer with hydrophilic exhaust filter
US5476538A (en) * 1993-07-13 1995-12-19 Japan Atomic Energy Research Institute Method of removing aerosols by the radiation effect
US5484570A (en) * 1992-11-24 1996-01-16 Mitsubishi Denki Kabushiki Kaisha Microbe propagation prenvention method
GB2304576A (en) * 1995-09-07 1997-03-26 George Richardson Reduction of airborne contaminants
WO1997015791A1 (de) * 1995-10-23 1997-05-01 Hans Joachim Huf Verfahren zur versorgung von probanden mit einem erhöhten sauerstoffangebot
US6019815A (en) * 1997-01-06 2000-02-01 Carrier Corporation Method for preventing microbial growth in an electronic air cleaner
DE20005814U1 (de) 2000-03-29 2000-10-12 Filterwerk Mann + Hummel GmbH, 71638 Ludwigsburg Luftfilter
US6149717A (en) * 1997-01-06 2000-11-21 Carrier Corporation Electronic air cleaner with germicidal lamp
US6162285A (en) * 1997-05-08 2000-12-19 Applied Materials, Inc. Ozone enhancement unit
US6228149B1 (en) 1999-01-20 2001-05-08 Patterson Technique, Inc. Method and apparatus for moving, filtering and ionizing air
US6245132B1 (en) 1999-03-22 2001-06-12 Environmental Elements Corp. Air filter with combined enhanced collection efficiency and surface sterilization
US6544485B1 (en) 2001-01-29 2003-04-08 Sharper Image Corporation Electro-kinetic device with enhanced anti-microorganism capability
US20060278075A1 (en) * 2005-06-13 2006-12-14 Ivar Blackner Air purifier and related methods for residential dwellings

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941433U (ja) * 1982-09-07 1984-03-16 株式会社ラツカサン 陰イオン電床を内蔵したカ−テン
JPS60241690A (ja) * 1984-02-13 1985-11-30 バイオメツド、エレクトロニツク、ゲゼルシヤフト、ミツト、ベシユレンクテル、ハフツング、ウント、コンパニ−、メデイツイ−ニシエル、ゲレ−テバウ、コマンデイ−トゲゼルシヤフト ガス状酸素をイオン化するイオン化室
CN108204651B (zh) * 2016-12-20 2021-04-27 青岛海尔智能技术研发有限公司 离子送风设备

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418339A (en) * 1942-02-28 1947-04-01 Westinghouse Electric Corp Gas purifier and sterilizer
US2553711A (en) * 1949-03-11 1951-05-22 Raymond B Jackson Portable sterilizing apparatus
US2785769A (en) * 1952-12-29 1957-03-19 Phillips Petroleum Co Carbon black separation
US2958393A (en) * 1958-06-17 1960-11-01 Lueder Holger Electrode system for the separator of an electric dust precipitator
US3313971A (en) * 1960-02-29 1967-04-11 Westinghouse Electric Corp Photosensitive element stable in air
US3403252A (en) * 1960-02-29 1968-09-24 Westinghouse Electric Corp Air processing apparatus and ion generator comprising an electromagnetic radiation source and a stable electron emitting photosensitive member
US3533222A (en) * 1965-09-01 1970-10-13 Mediterranea Compagnia Ind Com De-dusting device for smoke and other gaseous fluids
US3599399A (en) * 1968-03-08 1971-08-17 Thomas J Gallen Apparatus for filtering pollutants
US3722182A (en) * 1970-05-14 1973-03-27 J Gilbertson Air purifying and deodorizing device for automobiles
US3738088A (en) * 1971-06-04 1973-06-12 L Colosimo Mobile air cleaning apparatus for pollution removal
US3804942A (en) * 1971-11-16 1974-04-16 Shimizu Construction Co Ltd Air purifier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL15232C (nl) * 1924-02-29
NL6716852A (nl) * 1967-02-20 1968-08-21
FR1547435A (fr) * 1967-06-05 1968-11-29 Générateur d'air ionisé négativement
FR1530803A (fr) * 1967-06-30 1968-06-28 Assainisseur d'air

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418339A (en) * 1942-02-28 1947-04-01 Westinghouse Electric Corp Gas purifier and sterilizer
US2553711A (en) * 1949-03-11 1951-05-22 Raymond B Jackson Portable sterilizing apparatus
US2785769A (en) * 1952-12-29 1957-03-19 Phillips Petroleum Co Carbon black separation
US2958393A (en) * 1958-06-17 1960-11-01 Lueder Holger Electrode system for the separator of an electric dust precipitator
US3313971A (en) * 1960-02-29 1967-04-11 Westinghouse Electric Corp Photosensitive element stable in air
US3403252A (en) * 1960-02-29 1968-09-24 Westinghouse Electric Corp Air processing apparatus and ion generator comprising an electromagnetic radiation source and a stable electron emitting photosensitive member
US3533222A (en) * 1965-09-01 1970-10-13 Mediterranea Compagnia Ind Com De-dusting device for smoke and other gaseous fluids
US3599399A (en) * 1968-03-08 1971-08-17 Thomas J Gallen Apparatus for filtering pollutants
US3722182A (en) * 1970-05-14 1973-03-27 J Gilbertson Air purifying and deodorizing device for automobiles
US3738088A (en) * 1971-06-04 1973-06-12 L Colosimo Mobile air cleaning apparatus for pollution removal
US3804942A (en) * 1971-11-16 1974-04-16 Shimizu Construction Co Ltd Air purifier

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102654A (en) * 1976-07-27 1978-07-25 Raymond Bommer Negative ionizer
US4246105A (en) * 1977-04-14 1981-01-20 Ernst Rohrer Method for the reduction of the chemical oxygen demand of water and waste water by catalytic oxidation and use of such method
US4264343A (en) * 1979-05-18 1981-04-28 Monsanto Company Electrostatic particle collecting apparatus
US4265641A (en) * 1979-05-18 1981-05-05 Monsanto Company Method and apparatus for particle charging and particle collecting
US4253852A (en) * 1979-11-08 1981-03-03 Tau Systems Air purifier and ionizer
US4757422A (en) * 1986-09-15 1988-07-12 Voyager Technologies, Inc. Dynamically balanced ionization blower
US4980796A (en) * 1988-11-17 1990-12-25 Cybergen Systems, Inc. Gas ionization system and method
US5009683A (en) * 1989-07-24 1991-04-23 Sun Shin Ching Purifying air conditioner
USRE34549E (en) * 1989-07-24 1994-02-22 Sun; Shin-Ching Purifying air conditioner
US5215718A (en) * 1990-04-02 1993-06-01 Katzer Rodney A Laboratory dryer with hydrophilic exhaust filter
WO1992019377A1 (en) * 1991-04-25 1992-11-12 Micro Diagnostics Corporation Laboratory dryer with hydrophilic exhaust filter
US5484570A (en) * 1992-11-24 1996-01-16 Mitsubishi Denki Kabushiki Kaisha Microbe propagation prenvention method
US5476538A (en) * 1993-07-13 1995-12-19 Japan Atomic Energy Research Institute Method of removing aerosols by the radiation effect
GB2304576A (en) * 1995-09-07 1997-03-26 George Richardson Reduction of airborne contaminants
GB2304576B (en) * 1995-09-07 1999-11-24 George Richardson Reduction of airborne contaminants
WO1997015791A1 (de) * 1995-10-23 1997-05-01 Hans Joachim Huf Verfahren zur versorgung von probanden mit einem erhöhten sauerstoffangebot
US6149717A (en) * 1997-01-06 2000-11-21 Carrier Corporation Electronic air cleaner with germicidal lamp
US6019815A (en) * 1997-01-06 2000-02-01 Carrier Corporation Method for preventing microbial growth in an electronic air cleaner
US6162285A (en) * 1997-05-08 2000-12-19 Applied Materials, Inc. Ozone enhancement unit
US6228149B1 (en) 1999-01-20 2001-05-08 Patterson Technique, Inc. Method and apparatus for moving, filtering and ionizing air
US6245132B1 (en) 1999-03-22 2001-06-12 Environmental Elements Corp. Air filter with combined enhanced collection efficiency and surface sterilization
US6245126B1 (en) 1999-03-22 2001-06-12 Enviromental Elements Corp. Method for enhancing collection efficiency and providing surface sterilization of an air filter
DE20005814U1 (de) 2000-03-29 2000-10-12 Filterwerk Mann + Hummel GmbH, 71638 Ludwigsburg Luftfilter
US6544485B1 (en) 2001-01-29 2003-04-08 Sharper Image Corporation Electro-kinetic device with enhanced anti-microorganism capability
US20030165410A1 (en) * 2001-01-29 2003-09-04 Taylor Charles E. Personal air transporter-conditioner devices with anti -microorganism capability
US20060278075A1 (en) * 2005-06-13 2006-12-14 Ivar Blackner Air purifier and related methods for residential dwellings

Also Published As

Publication number Publication date
FR2203644B1 (nl) 1976-10-29
JPS4975095A (nl) 1974-07-19
FR2203644A1 (nl) 1974-05-17

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