EP0048102A1 - Luftionisierungsvorrichtungen - Google Patents

Luftionisierungsvorrichtungen Download PDF

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Publication number
EP0048102A1
EP0048102A1 EP81303932A EP81303932A EP0048102A1 EP 0048102 A1 EP0048102 A1 EP 0048102A1 EP 81303932 A EP81303932 A EP 81303932A EP 81303932 A EP81303932 A EP 81303932A EP 0048102 A1 EP0048102 A1 EP 0048102A1
Authority
EP
European Patent Office
Prior art keywords
electrode
voltage
carbon fibre
air ionization
negative ions
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.)
Withdrawn
Application number
EP81303932A
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English (en)
French (fr)
Inventor
Jolyon Michael Crane
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.)
PENNY AND GILES POTENTIOMETERS Ltd
Original Assignee
PENNY AND GILES POTENTIOMETERS 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 PENNY AND GILES POTENTIOMETERS Ltd filed Critical PENNY AND GILES POTENTIOMETERS Ltd
Publication of EP0048102A1 publication Critical patent/EP0048102A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

  • This invention relates to air ionization devices for producing negative ions by corona discharge.
  • air ionization devices for producing large numbers of negative ions for dissemination into the air in homes and workplaces.
  • some previously proposed air ionization devices include an electrode at which the corona discharge takes place and which is in the form a sharp needle or a stainless steel brush.
  • the efficiency of the discharge is very dependent on the sharpness of the point, but clearly a very sharp point, which must necessarily be exposed to the air, is ,a safety hazard particularly to young children.
  • a stainless steel brush is safer, but substantially less efficient as an ion emitter, because the brush quickly becomes clogged with dirt and also the closely adjacent metallic points have a mutual screening effect.
  • the drive circuit which supplies the high voltage to the electrode should include a current limiting resistor. If, however, this resistor is short circuited for any reason, the necessary electrical safety is lost.
  • an air ionization device comprising an electrode and means for applying to said electrode a negative voltage of sufficient magnitude to cause a corona discharge and produce negative ions at said electrode, said electrode being formed of carbon fibre filaments.
  • Such devices can be associated with other equipment in many different ways, for example by being incorporated in air or gas cleaners, or in air conditioning systems or air circulating systems. Such devices can also be used in association with equipment such as fan heaters or cathode ray tubes which tend to produce an excess of positive ions.
  • the invention also provides air ionization devices suitable for use to increase the number of negative ions in a room or other living space, such as a workplace or a car, without being specifically associated with any other equipment except a suitable power supply.
  • an air ionization device comprising an electrode, and a circuit for producing from a relatively low voltage source a negative voltage for application to said electrode of sufficient magnitude to cause a corona discharge and produce negative ions at said electrode, said electrode being formed of carbon fibre filaments.
  • the relatively low voltage source may be an alternating current mains source in which case said circuit may include a transformer and one or more voltage-doubler rectifer circuits, or it may be a battery or solar cells, in which case said circuit may include an inverter circuit to produce an alternating current for subsequent voltage step-up.
  • said circuit includes a series connection of a plurality of current limiting resistors, so that if one of the resistors becomes shortcircuited, the remaining resistor or resistors are effective to limit to the current that can be derived from said electrode.
  • the carbon fibre filaments comprise a bundle or bunch of some forty-thousand filaments each some 7 or 8 microns in diameter.
  • Such an electrode is soft to the touch and moreover is very readily cleaned of dirt simply by blowing on it.
  • the air ionization device is intended to be powered from the usual 240 volts ac mains and line and neutral input terminals 1 and 2 are provided for this purpose.
  • the terminals 1 and 2 are connected by way of a thermal fuse 3 and directly to the primary winding 4 of a step-up transformer 5, which develops an output voltage of some 1.2 kilovolts across a secondary winding 6.
  • the secondary winding 6 is connected to two series-connected voltage-dealer rectifier circuits 7 and 8, the rectifier circuit 7 comprising rectifier diodes Dl and D2 and capacitors Cl and C3, and the rectifier circuit 8 comprising rectifier diodes D3 and D4 and capacitors C2 and C4.
  • a 1 megohm resistor 9 is connected between the neutral input terminal 2 and the junction of one end of the secondary winding 6, and the diode D1 and the capacitor C3 in the rectifier circuit 7, so the neutral input terminal 2 forms the circuit earth point.
  • the voltage-doubler rectifier circuits 7 and 8 operate to produce a negative output voltage of some 6.8 kilovolts dc at an output terminal 10.
  • the output terminal 10 is connected to a socket 11 by way of a series- connection of a plurality of current-limiting resistors 12, there being nine resistors 12 in the present case.
  • Each resistor 12 is of 10 megohms resistance and 0.5 watt capacity.
  • Mating with the socket 11 is a plug 13 to which is attached an electrode 14 shown in more detail in Figure 2.
  • the thermal fuse 3 is provided to provide a safety cut-out should the primary winding 4 become over-heated due to malfunction of components in the voltage-doubler rectifier circuits 7 and 8 or of the transformer 5.
  • the electrode 14 comprises a moulded body 15 of plastics material from one end of which projects the plug 13 comprising tinned copper connectors. From the other end of the body 15 projects a bundle or bunch of carbon fibre filaments 16 at which the actual corona discharge and production of negative ions takes place for dissemination into the surrounding air.
  • the carbon fibre filaments 16 comprises some forty-thousand filaments 16 each some 12 mm in length and 7 to 8 microns in diameter.
  • the base of the bundle is some 2 mm in diameter and the body 15 some 5 mm in diameter and 7.5 mm in length. If desired a tapered member may be pressed into the centre of the bundle to cause the carbon fibre filaments 16 to fan out to some extent.
  • the plug 13 projects by a further 5 mm or so and is readily connectable to and disconnectable from the socket 11 to enable the electrode 14 to be removed for cleaning. Such cleaning is very readily effected, simply by blowing on the bundle of carbon fibre filaments 16.
  • the circuit is contained in a suitable housing from which only the electrode 14 and a flex which may include a fused switch with a neon indicator projects.
  • the housing which may, for example, be generally spherical, may be made of a ceramic material and the circuit may be held in the interior of the housing by a flexible potting medium.
  • the air ionization device described has a number of advantages.
  • the diameter of each of the carbon fibre filaments 16 is comparable to the diameter of a very sharp point, and remains so even after erosion, so the production of a corona discharge and negative ions is very efficient.
  • the very large number of carbon fibre filaments 16 and their diameter is such as to reduce erosion problems. At any one time only a few of the carbon fibre filaments 16 are actually effective as negative ion emitters and if these carbon fibre filaments 16 erode or are broken their function is taken over by others, so in view of the very large number of carbon fibre filaments 16, the electrode 14 has a long life.
  • the few operating carbon fibre filaments 16 are repelled by electrostatic force from the main bunch, thus providing the necessary voltage gradient around each tip to promote corona discharge and ion production.
  • the electrode 14 is readily cleaned to remove dust, and indeed it can even be washed if necessary.
  • the bundle of carbon fibre filaments 16 feels quite soft to the touch and hence the air ionization device can more readily be used in an exposed position and hence be more efficiently used.
  • a reaction force acts on the electrode 14, and this can be used as a driving force to produce movement.
  • a reaction force acts on the electrode 14, and this can be used as a driving force to produce movement.
  • two electrodes 14 are mounted horizontally and facing in opposite directions at respective ends of a conductive arm 17 which is mounted horizontally and is rotatable about a vertical axis 18, the arm 17 will rotate.

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  • Electrostatic Separation (AREA)
EP81303932A 1980-09-11 1981-08-27 Luftionisierungsvorrichtungen Withdrawn EP0048102A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8029357 1980-09-11
GB8029357 1980-09-11

Publications (1)

Publication Number Publication Date
EP0048102A1 true EP0048102A1 (de) 1982-03-24

Family

ID=10516016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81303932A Withdrawn EP0048102A1 (de) 1980-09-11 1981-08-27 Luftionisierungsvorrichtungen

Country Status (1)

Country Link
EP (1) EP0048102A1 (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120864A (en) * 1982-05-05 1983-12-07 Charles Denis Middleton Air ionizers
GB2136215A (en) * 1983-02-18 1984-09-12 Amcor Ltd Ionisation apparatus
GB2141589A (en) * 1983-06-02 1984-12-19 Eaton Williams Raymond H A device for generating ions of the corona discharge type
EP0212379A2 (de) * 1985-08-21 1987-03-04 Till Keesmann Vorrichtung zum Fördern der Verbrennung in Verbrennungsanlagen
US4719535A (en) * 1985-04-01 1988-01-12 Suzhou Medical College Air-ionizing and deozonizing electrode
WO1992019030A1 (de) * 1991-04-12 1992-10-29 Naum Goldstein Vorrichtung zur herstellung definierter, ionisierter gase bzw. von ionisationsprodukten
EP1605565A1 (de) * 2004-05-18 2005-12-14 LG Electronics Inc. Negative ion generator using carrbon fiber
EP3048381A4 (de) * 2013-09-16 2016-08-10 Shenzhen Tongsheng Green Technology Co Ltd Luftreiniger mit negativen ionen
EP3048380A4 (de) * 2013-09-16 2016-08-10 Shenzhen Tongsheng Green Technology Co Ltd Luftreiniger mit negativen ionen
JP2017050183A (ja) * 2015-09-02 2017-03-09 シャープ株式会社 イオン発生装置、イオン発生装置の製造方法、および電気機器
WO2019081580A1 (fr) * 2017-10-28 2019-05-02 Ancilia Protect Ltd Ioniseur équipé d'un accélérateur de flux ionique notamment pour la protection contre les moustiques
US10910186B2 (en) 2015-08-05 2021-02-02 Sharp Kabushiki Kaisha Ion generation device with brush-like discharge electrodes
RU2778068C2 (ru) * 2017-10-28 2022-08-15 Ансилиа Протект Лтд Ионизатор, оборудованный ускорителем ионного потока, в частности, чтобы защищать от москитов

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263102A (en) * 1958-05-12 1966-07-26 Company Wachovia Bank An Trust Electrical thrust producing device
US3873835A (en) * 1973-11-02 1975-03-25 Vladimir Ignatjev Ionizer
FR2270700A1 (de) * 1974-05-09 1975-12-05 Breton Jacques
US4096544A (en) * 1976-12-09 1978-06-20 Vladimir Ignatjev Air ionizer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263102A (en) * 1958-05-12 1966-07-26 Company Wachovia Bank An Trust Electrical thrust producing device
US3873835A (en) * 1973-11-02 1975-03-25 Vladimir Ignatjev Ionizer
FR2270700A1 (de) * 1974-05-09 1975-12-05 Breton Jacques
US4096544A (en) * 1976-12-09 1978-06-20 Vladimir Ignatjev Air ionizer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Elektor, Vol. 3, No. 10, October 1977, Canterbury, GB "Ioniser", pages 35-37 * page 35, 2nd column, line 48 - page 37, 1st column, line 20; figure 1 * *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120864A (en) * 1982-05-05 1983-12-07 Charles Denis Middleton Air ionizers
GB2136215A (en) * 1983-02-18 1984-09-12 Amcor Ltd Ionisation apparatus
GB2141589A (en) * 1983-06-02 1984-12-19 Eaton Williams Raymond H A device for generating ions of the corona discharge type
US4719535A (en) * 1985-04-01 1988-01-12 Suzhou Medical College Air-ionizing and deozonizing electrode
EP0212379A2 (de) * 1985-08-21 1987-03-04 Till Keesmann Vorrichtung zum Fördern der Verbrennung in Verbrennungsanlagen
EP0212379A3 (en) * 1985-08-21 1988-03-30 Till Keesmann Device for improving combustion in combustion plants
WO1992019030A1 (de) * 1991-04-12 1992-10-29 Naum Goldstein Vorrichtung zur herstellung definierter, ionisierter gase bzw. von ionisationsprodukten
EP1605565A1 (de) * 2004-05-18 2005-12-14 LG Electronics Inc. Negative ion generator using carrbon fiber
EP3048381A4 (de) * 2013-09-16 2016-08-10 Shenzhen Tongsheng Green Technology Co Ltd Luftreiniger mit negativen ionen
EP3048380A4 (de) * 2013-09-16 2016-08-10 Shenzhen Tongsheng Green Technology Co Ltd Luftreiniger mit negativen ionen
US10910186B2 (en) 2015-08-05 2021-02-02 Sharp Kabushiki Kaisha Ion generation device with brush-like discharge electrodes
JP2017050183A (ja) * 2015-09-02 2017-03-09 シャープ株式会社 イオン発生装置、イオン発生装置の製造方法、および電気機器
KR20170105091A (ko) * 2015-09-02 2017-09-18 샤프 가부시키가이샤 이온 발생 장치, 이온 발생 장치의 제조 방법 및 전기 기기
CN107925223A (zh) * 2015-09-02 2018-04-17 夏普株式会社 离子发生装置、离子发生装置的制造方法以及电气设备
CN107925223B (zh) * 2015-09-02 2019-11-19 夏普株式会社 离子发生装置、离子发生装置的制造方法以及电气设备
US10748733B2 (en) 2015-09-02 2020-08-18 Sharp Kabushiki Kaisha Ion generation device, method for producing ion generating device, and electrical device
WO2017038111A1 (ja) * 2015-09-02 2017-03-09 シャープ株式会社 イオン発生装置、イオン発生装置の製造方法、および電気機器
WO2019081580A1 (fr) * 2017-10-28 2019-05-02 Ancilia Protect Ltd Ioniseur équipé d'un accélérateur de flux ionique notamment pour la protection contre les moustiques
FR3072891A1 (fr) * 2017-10-28 2019-05-03 Ancilia Protect Ltd Ioniseur equipe d’un accelerateur de flux ionique notamment pour la protection contre les moustiques
RU2778068C2 (ru) * 2017-10-28 2022-08-15 Ансилиа Протект Лтд Ионизатор, оборудованный ускорителем ионного потока, в частности, чтобы защищать от москитов
US11510406B2 (en) 2017-10-28 2022-11-29 Ancilia Protect Ltd Ioniser equipped with an ionic flow accelerator in particular to protect against mosquitoes

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: CRANE, JOLYON MICHAEL