WO1997019710A1 - Epurateur d'air a sorties separees pour l'ozone et l'air ionise - Google Patents

Epurateur d'air a sorties separees pour l'ozone et l'air ionise Download PDF

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Publication number
WO1997019710A1
WO1997019710A1 PCT/IB1995/001161 IB9501161W WO9719710A1 WO 1997019710 A1 WO1997019710 A1 WO 1997019710A1 IB 9501161 W IB9501161 W IB 9501161W WO 9719710 A1 WO9719710 A1 WO 9719710A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
ozone
electric charge
generator
outlet
Prior art date
Application number
PCT/IB1995/001161
Other languages
English (en)
Inventor
Maxwell Hsu
Original Assignee
Airlux Electrical Co., Ltd.
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 Airlux Electrical Co., Ltd. filed Critical Airlux Electrical Co., Ltd.
Priority to PCT/IB1995/001161 priority Critical patent/WO1997019710A1/fr
Publication of WO1997019710A1 publication Critical patent/WO1997019710A1/fr

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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
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/22—Ionisation
    • 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

Definitions

  • This invention relates to an apparatus and method for cleaning and purifying air by means of an air cleaner having separate ozone gas and ionized air outputs .
  • Electrostatic precipitation is particularly effective for removing particulate impurities from the air. By passing contaminated air successively through an electrostatic air filter, the particulate matter can be effectively removed.
  • electrostatic precipitation By passing contaminated air successively through an electrostatic air filter, the particulate matter can be effectively removed.
  • the problem of odors resulting from stale tobacco, body perspiration and the like is not remedied by electrostatic precipitation. Accordingly, the use of an ozone gas generator which supplies ozone to the air has been proven effective in oxidizing micro-organisms such as bacteria to kill the same which eliminates odors.
  • U.S. Patent No. 4,244,712 to Tongret teaches an air cleansing system using treated recirculating air.
  • the system comprises a portable housing having an air entrance and air exit openings.
  • the housing incorporates an electrostatic air cleaner, a charcoal filter, an ozone gas generator and a negative ion generator to provide treated air having ozone and negatives ions and wherein the electrostatic cleaner and charcoal filter physically and chemically remove impurities from the air.
  • U.S. Patent No. 4,049,400 to Bennett et al. discloses an air purifying apparatus having an ozone generator and an electrostatic filter.
  • the air purifier includes two charge carrying plates abutting opposite sides of a planar dielectic layer along the entire width of each plate, one of the plates being relatively narrow in width in comparison to the other plate.
  • the plate configuration prolongs the life of the dielectric layer and permits easy cleaning of the air purifier.
  • U.S. Patent No. 4,516,991 to Kawashima discloses an air cleaning apparatus including a plurality of dust collecting electrodes alternately arranged with panel electrodes and spaced from each other at predetermined intervals to form air flow passages.
  • the intervals between the panel electrodes and the dust collecting electrodes are selected to maintain a predetermined potential gradient in response to the value of the voltage applied between the panel electrodes and the dust collecting electrodes, whereby corona discharges are generated between the dust collecting electrodes and the ionizing wires to produce air streams.
  • U.S. Patent No. 5,055,115 to Yikai et al. teaches an air cleaner including an electric precipitating apparatus that employs corona discharge and an ozone removing apparatus downstream of the precipitating apparatus.
  • the ozone removing apparatus has a carbon filter, and is charged with a low positive voltage to remove ozone generated by the precipitating apparatus by chemical conversion to oxygen and carbon dioxide.
  • the present invention contemplates a method and apparatus for cleaning and purifying air wherein an air cleaner device produces separate outputs of ozone gas and ionized air.
  • electrostatic precipitation of particulates suspended in the air may occur when the particulates are subject to a net negative or positive electric charge, and then are collected on a filter or collection device which has a net opposite electric charge. Further cleaning of air may occur when the air is subject to the corona discharge created by oppositely charged elements having a dielectric material disposed therebetween.
  • the corona discharge takes the form of ozone gas which serves to oxidize contaminants such as bacteria or other micro-organisms suspended in the air, which in turn destroys undesirable odors associated therewith.
  • the apparatus of this invention includes an exterior housing which houses an independent ozone generation component and an independent ionizer component.
  • surrounding environmental air is drawn through the apparatus by a blower, passes through an ionizing manifold wherein a plurality of spaced discharge needles create an electrostatic field which induces a net negative charge on the air, and then the ionized air is forced back into the surrounding environment by the force of the blower.
  • the ionized air recirculates back into the apparatus, the ionized air having the net negative charge is electrostatically filtered when coming into contact with a filter unit which has a net positive charge.
  • the continuing recirculation of air through the apparatus wherein the air is repeatedly subject to the electrostatic precipitation results in a purifying effect upon the air by removing the undesirable particulates.
  • the ozone gas generator component of this invention includes a pump which draws air into an ozone mixing chamber having a corona discharge unit and then discharges the air mixed with ozone through an outlet.
  • a power switch controls the production of ionized air through the ion generator and a separate function switch controls the output of ozone from the apparatus.
  • a timer circuit incorporated within the electronics of the device automatically deenergizes the ozone generator at a predetermined time to prevent excessive amounts of ozone gas from being introduced into the surrounding air. Excessive ozone m the air has been found to be an irritant and is therefore counterproductive to its beneficial oxidizing effect in killing micro-organisms.
  • Ozone may be directly pumped into the surrounding environmental air through an outlet fitting, or a tube extension may be connected to the outlet fitting in order that concentrated amounts of the air and ozone mixture may be applied directly to a remote location.
  • the air and ozone mixture may be output simultaneously with the ionized air, or the mixture may be selectively separated from the ionized air and applied to a specific area remote from the ionized air.
  • the tube extension may enable the ozone mixture to be directly applied to the area in order to deodorize particularly odorous areas within the cabinet caused by bacteria growing therein. That is, the ozone mixture applied by the tube extension provides a concentrated amount of ozone to more effectively provide deliberate deodorization of targeted areas.
  • the tube exterior can also be placed m water to help disinfect the water which may be used for washing vegetables or the like.
  • the tube extension can be placed in close proximity to items like fruits and vegetables m order to cleanse them by exposure to the ozone gas. Because of the compact construction of the apparatus of this invention, the apparatus is ideally suited for use in the home or office. Additionally, the combination of the ion generator and ozone generator within the same apparatus prevents having to utilize a separate electrostatic precipitator and ozone generator to achieve the same dual air cleaning function. Another important advantage of this invention is that ozone is generated inside the same mixing chamber through which the circulating air is pumped. The advantage of exposing the circulated air to the location at which ozone is created is that a high temperature zone is created within the mixing chamber itself. This high temperature zone is very destructive to bacteria and is more effective than ozone treated air at ambient temperatures.
  • the ozone itself will convert common chemicals having an unpleasant odor to less volatile species which can be more easily absorbed in the filter unit.
  • aldehydes are converted to fatty acids, amines to amides or amine oxides, mercaptans to sulphinic acids and non-saturated hydrocarbons to ozonides.
  • Figure 1 is a partially exploded fragmentary, perspective view of the air cleaner of this invention
  • Figure IA is a vertical section view of the filter unit of the apparatus of this invention taken along line 1A-1A of Figure 1;
  • Figure 2 is a plan view of the apparatus of this invention taken along line 2-2 of Figure 1;
  • Figure 3 is a plan view of the apparatus of this invention taken along line 3-3 of Figure 1;
  • Figure 4 is a schematic block diagram illustrating the basic functioning of the apparatus of this invention.
  • Figure 5 is a schematic circuit diagram of the apparatus of this invention illustrating the major component elements including the blower, ion generator, control switches, ozone generator and timer circuit;
  • Figure 6 is a schematic circuit diagram of the high voltage circuit used in conjunction with the ozone generator of this invention.
  • Figure 7 is a schematic diagram of the ozone generator of this invention illustrating the flow of air within the ozone mixing chamber of the ozone generator.
  • Figure 8 is an enlarged schematic diagram of the corona discharge unit of the ozone generator.
  • an apparatus for cleaning and purifying air utilizing separate ozone and ionized air outputs.
  • the apparatus 10 of this invention includes an exterior housing 12 which may be formed of extruded or molded material such as plastic. Attached to the bottom surface of the housing 12 is a base unit 14 which stabilizes the air cleaner 10 in an upright position. A plurality of connecting means 15 are provided to join the upper and lower sections of the exterior housing 12.
  • On the front face of the housing 12 is an outlet grate 18 which includes a plurality of holes or slots enabling circulated air to be passed therethrough.
  • On the rear face of the housing 12 is attached accumulator grate 30.
  • filter unit 20 Positionable against and exteriorly of grate 30 is filter unit 20 which is used for mechanically and electrostatically filtering out impurities from circulated air.
  • Inlet grate 16 is removably mounted exteriorly of filter unit 20.
  • Inlet grate 16 also includes a plurality of holes or slots enabling circulated air to be passed therethrough.
  • Inlet grate 16 holds the filter unit 20 in place against the accumulator grate 30.
  • the filter unit 20 may comprise a plurality of layers designed to filter impurities within the air.
  • filter unit 20 may include a first polypropelene fiber filter layer 22, a 3M ® static electricity fiber filter layer 24, an activated carbon filter layer 26 and a second polypropelene fiber filter layer 28. As shown, layers 22 and 28 are on opposite and exterior sides of the filter unit 20 with the layers 24 and 26 disposed therebetween.
  • Blower 32 is mounted within the housing 12 adjacent the accumulator grate 30. As illustrated, blower 32 may be of the cylindrical rotary-type which is driven by blower motor 34. Blower mount structure 33 serves to hold blower 32 in place.
  • Ion generator 36 Adjacent to blower 32 and opposite accumulator grate 30 is positioned the ion generator 36.
  • Ion generator 36 includes a discharge manifold 40 which contains a plurality of discharge needles 38.
  • Charge distribution plate 39 is mounted on the discharge manifold 40 and electrically communicates with discharge needles 38. Electrostatic precipitation of contaminants such as particulates suspended in the surrounding air is achieved by use of the filter unit 20, accumulator grate 30 and ion generator 36.
  • the blower 32 draws in surrounding air through inlet grate 16 and through filter unit 20. Air continues to pass through the interior of the housing 12 until it reaches the opening of discharge manifold 40 positioned adjacent the outlet side of blower 32.
  • the discharge needles 38 create an ionized field which induces a net negative electric charge on the air passing therethrough.
  • the a r finally exits the housing 12 through outlet grate 18 and back into the surrounding environment.
  • the blower 32 continues to operate which causes the ionized air to eventually recirculate back into the interior of the housing 12.
  • filter unit 20 As the ionized air is redrawn back into the housing 12, it contacts filter unit 20 which carries a net positive charge as induced upon it by accumulator grate 30.
  • accumulator grate 30 is connected electrically to the circuitry of the apparatus and carries a net positive charge.
  • the filter unit 20 maintains physical contact with accumulator grate 30 causing the filter unit 20 to also maintain a net positive charge. Accordingly, filter unit 20 is able to electrostatically precipitate the negatively charged particles passing therethrough. More specifically, the 3M ⁇ static electricity fiber filter layer 24 is specially suited for maintaining a positive charge to help electrostatically precipitate particulates. Fiber filter layers 22, 26 and 28 serve to electrostatically and mechanically filter out impurities in the air as well. Therefore, the filter unit 20 has both mechanical filtration capabilities and electrostatic capabilities. Due to the construction of the ion generator 36, a minimum of ozone gas is produced by the ion generator.
  • the ionization of the air is achieved without necessarily producing an arc discharge within the air itself, thus greatly minimizing the amount of ozone produced relative to the concentration of ionized air. While some residual amount of ozone may be produced by the ion generator 36, the function of producing concentrated amounts ozone is specifically achieved by the ozone generator 50.
  • air pump 46 draws air through pump inlet 47 and then forces air out through pump outlet tube 48. Pump outlet tube 48 communicates with the inlet of ozone generator 50.
  • the air pressure created by pump 46 is on the magnitude from .1 to .9 kilograms/cm 2 .
  • Corona discharge unit 54 includes a positively charged high voltage input 56 which connects to a wire-type high voltage discharge pole 58. Corona discharge unit 54 further includes a negatively charged high voltage input 57 which is connects to a corresponding plate- type induction pole 59. As will be discussed below, the high voltage inputs 56 and 57 are created by the high voltage circuit 84 illustrated m Figure 6. In operation, pulse voltages at frequencies between 19 to 25 kilohertz (Khz) and at magnitudes between 4.5 to 7 kilovolts (Kv) are provided to inputs 56 and 57.
  • Khz kilohertz
  • Kv kilovolts
  • a dielectric material 55 Disposed between and around discharge pole 58 and induction pole 59 is a dielectric material 55 such as a ceramic.
  • the interaction of the oppositely charged high voltage poles along with the dielectric 55 results m the creation of a corona discharge in the form of ozone gas .
  • the circulation of air around the corona discharge unit 54 within mixing chamber 53 results in a mixture of air with the ozone. Because of the confined space of the mixing chamber 53, a very effective mixing of the air takes place with the generated ozone.
  • the confined mixing space coupled with the pressurized air passing through the mixing chamber 53 is a more advantageous method of providing concentrated ozone mixture than simply venting ozone to a larger area wherein mixing is less effective.
  • Power switch 62 includes a high and low setting which controls blower 32. Power switch 62 also controls power to the ion generator 36.
  • Function switch 64 includes a high and low setting and controls power to the timer circuit 74, and to the high voltage circuit 84 illustrated in Figure 6 which in turn provides power to the air pump 46 and the high voltage inputs 56 and 57 of the ozone generator 50.
  • Timer circuit 74 is used to control the length of time that the ozone generator 50 operates when energized.
  • the timer can be set for a 60 minute run time at which time the timer will then deenergize the ozone generator 50.
  • integrated circuit chip 76 can be programmed to provide different run times which best suit the needs of the particular application of the apparatus. To reset the timer circuit 74, power switch 62 may be turned on and off to begin the desired timing sequence.
  • the high voltage circuit 84 of this invention is primarily composed of a high frequency oscillating transistor Q x and step up transformers Tl and T2. As shown, a standard power source is received at 110 volts and 60 Hz. The high frequency oscillating function of the circuit greatly increases the frequency to between the range of 19 to 25 Khz. Then, transformers Tl and T2 convert the high frequency oscillating voltage into pulses of positive high voltages via diode D5 and capacitor C7 and into pulses of negative high voltages via diode D6 and capacitor C6 to output terminals R and W.
  • Tl converts the voltage to 4.5 Kv (pulse to pulse voltage) and transformer T2 converts the voltage to 7 Kv (pulse to pulse voltage) .
  • High voltage input 56 connects with terminal R and high voltage input 57 connects with terminal thus providing the necessary high voltage to create the ozone within the ozone generator 50.
  • Manipulating function switch 64 enables high and low ozone generation corresponding to 7 Kv/25 Khz and 4.5 Kv/19 Khz, respectively.
  • the low ozone output setting of switch 64 is chosen when purifying the surrounding air and the high setting is chosen when using the extension tube 66, as explained below.
  • extension tube 66 and gas distribution means 68 are provided to enable the ozone mixture to be applied to the remote location.
  • Means 68 is provided to prevent undesirable materials from clogging tube 66 yet provides passage of the gaseous ozone air mixture.
  • extension tube 66 and means 68 may be placed in water to purify it.
  • tube 66 and means 68 may be placed in close proximity to confined spaces to eliminate odors or to sanitize objects such as fruits and vegetables.
  • Means 68 may take the form of a cintered filter or any suitable gas distribution fitting which directs pressurized gas to a desired location and prevents entry of objects large enough to block tube 66. Since two independent switches are provided which respectively control the creation of ozone and ionized air, an operator may choose to either purify the air solely by electrostatic precipitation or may wish to separately or simultaneously provide ozone to the surrounding air or to targeted objects.
  • the high voltage circuit 84 illustrated in Figure 6 is housed within high voltage generator 60.
  • the timer circuit 74 is embodied by circuit board 80.

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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)
  • Electrostatic Separation (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

La présente invention concerne un épurateur d'air comportant des sorties séparées pour l'ozone et l'air ionisé. Cet épurateur est constitué d'une enveloppe extérieure renfermant un générateur d'ozone et un générateur d'air ionisé. En fonctionnement, l'air aspiré au travers de l'épurateur d'air par une soufflante traverse d'abord un filtre multicouche. L'air traverse ensuite un ioniseur qui ionise l'air et y induit une charge nette électronégative. Lorsque l'air ionisé est repris dans le dispositif, le filtre qui entretient une charge électropositive nette précipite par effet électrostatique l'air négativement chargé. Le générateur d'ozone contenu dans le carter aspire de l'air au moyen d'une pompe à air délivrant au générateur d'ozone de l'air sous pression. Dans une chambre de mélange du générateur d'ozone, l'air sous pression se mélange à l'ozone qui y est produit, à la suite de quoi il est évacué par un tube indépendant d'évacuation d'ozone. Les générateurs d'ozone et d'ions peuvent fonctionner simultanément ou séparément, l'air environnant étant précipité et/ou mélangé avec l'ozone gazeux par effet électrostatique. Selon une autre réalisation, un tube prolongateur pouvant se raccorder au tube d'évacuation d'ozone permet de fournir en un point éloigné un mélange concentré en ozone. Un circuit d'horloge intégré à l'appareil permet de commander l'arrêt programmé du générateur d'ozone à une heure prédéfinie.
PCT/IB1995/001161 1995-11-30 1995-11-30 Epurateur d'air a sorties separees pour l'ozone et l'air ionise WO1997019710A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB1995/001161 WO1997019710A1 (fr) 1995-11-30 1995-11-30 Epurateur d'air a sorties separees pour l'ozone et l'air ionise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB1995/001161 WO1997019710A1 (fr) 1995-11-30 1995-11-30 Epurateur d'air a sorties separees pour l'ozone et l'air ionise

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WO1997019710A1 true WO1997019710A1 (fr) 1997-06-05

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100454331B1 (ko) * 2001-07-27 2004-10-26 황현배 오존 및 음이온 발생기
GB2403213A (en) * 2003-06-14 2004-12-29 Ozone Ind Ltd An ozone generator
WO2005118006A1 (fr) * 2004-06-03 2005-12-15 Mi-Sook Lee Desodorisant ameliore
GB2431152A (en) * 2003-06-14 2007-04-18 Ozone Ind Ltd An ozone generator
WO2007049223A1 (fr) * 2005-10-26 2007-05-03 Koninklijke Philips Electronics N.V. Appareil d'epuration de l'air
WO2010105420A1 (fr) * 2009-03-18 2010-09-23 Rht Limited Système de régénération et d'épuration de l'air à séquençage
WO2011091583A1 (fr) * 2010-01-27 2011-08-04 Rht Limited Procédé et appareil pour nettoyage d'air
CN107007934A (zh) * 2017-04-12 2017-08-04 梁柱环 一种静电式鼻炎治疗装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55157349A (en) * 1979-05-25 1980-12-08 Takuma Sogo Kenkyusho:Kk Air purifying apparatus
JPS63291655A (ja) * 1987-05-26 1988-11-29 Midori Anzen Kk 静電気除去装置付き空気清浄機
DE3905842A1 (de) * 1988-02-29 1989-09-07 Tohkai Kogyo Co Sterilisier-/deodorisiergeraet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55157349A (en) * 1979-05-25 1980-12-08 Takuma Sogo Kenkyusho:Kk Air purifying apparatus
JPS63291655A (ja) * 1987-05-26 1988-11-29 Midori Anzen Kk 静電気除去装置付き空気清浄機
DE3905842A1 (de) * 1988-02-29 1989-09-07 Tohkai Kogyo Co Sterilisier-/deodorisiergeraet

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100454331B1 (ko) * 2001-07-27 2004-10-26 황현배 오존 및 음이온 발생기
GB2403213A (en) * 2003-06-14 2004-12-29 Ozone Ind Ltd An ozone generator
GB2431152A (en) * 2003-06-14 2007-04-18 Ozone Ind Ltd An ozone generator
GB2431152B (en) * 2003-06-14 2007-12-19 Ozone Ind Ltd Ozone Generator Control
WO2005118006A1 (fr) * 2004-06-03 2005-12-15 Mi-Sook Lee Desodorisant ameliore
WO2007049223A1 (fr) * 2005-10-26 2007-05-03 Koninklijke Philips Electronics N.V. Appareil d'epuration de l'air
WO2010105420A1 (fr) * 2009-03-18 2010-09-23 Rht Limited Système de régénération et d'épuration de l'air à séquençage
WO2011091583A1 (fr) * 2010-01-27 2011-08-04 Rht Limited Procédé et appareil pour nettoyage d'air
CN107007934A (zh) * 2017-04-12 2017-08-04 梁柱环 一种静电式鼻炎治疗装置

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