EP3654465A1 - Ioniser - Google Patents

Ioniser Download PDF

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Publication number
EP3654465A1
EP3654465A1 EP18207052.4A EP18207052A EP3654465A1 EP 3654465 A1 EP3654465 A1 EP 3654465A1 EP 18207052 A EP18207052 A EP 18207052A EP 3654465 A1 EP3654465 A1 EP 3654465A1
Authority
EP
European Patent Office
Prior art keywords
emitting electrode
corona discharge
electrode
discharge points
air
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Withdrawn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
EP18207052.4A
Other languages
German (de)
French (fr)
Inventor
Lars Wettre
Emil HELIN
Carl Johan DAHLGREN
David Marcus ODELROS
Attila Fodor
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.)
Blueair Cabin Air AB
Original Assignee
Blueair Cabin Air AB
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 Blueair Cabin Air AB filed Critical Blueair Cabin Air AB
Priority to EP18207052.4A priority Critical patent/EP3654465A1/en
Priority to EP19801927.5A priority patent/EP3884551A1/en
Priority to PCT/EP2019/081856 priority patent/WO2020104488A1/en
Publication of EP3654465A1 publication Critical patent/EP3654465A1/en
Withdrawn legal-status Critical Current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
    • H01T19/00—Devices providing for corona discharge
    • H01T19/04—Devices providing for corona discharge having pointed electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/14—Plant or installations having external electricity supply dry type characterised by the additional use of mechanical effects, e.g. gravity
    • B03C3/155—Filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/36—Controlling flow of gases or vapour
    • B03C3/368—Controlling flow of gases or vapour by other than static mechanical means, e.g. internal ventilator or recycler
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/38—Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/41—Ionising-electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/10—Ionising electrode has multiple serrated ends or parts

Definitions

  • the present invention relates to an ionisation system for an air purifying device and with improved performance.
  • the prior art discloses an air purifying device for a cabin and comprising in parallel an array of circular ionisers each with a centrally disposed corona discharge tip.
  • WO 2013/080078 discloses apparatus with conductive strip for dust removal.
  • the conductive strip comprises points, which, on application of a voltage generate a corona and, what is described as, an ion wind. Particles from an exhaust are thereby charged and deposited onto the counter electrode and hence the exhaust air is cleaned.
  • EP-A1-3 056 364 discloses a vehicle with an ionising unit for cleaning air to cabin.
  • a device comprising an ionisation system for purifying the air of a substantially enclosed space, said system comprising an emitting electrode and a receiving electrode, the emitting electrode comprising a plurality of corona discharge points, the system further comprising a filter medium adapted to entrain charged particles which have passed through the ionisation system.
  • substantially enclosed space is meant a cabin, for example of a car or other motor vehicle, an office or a dwelling place.
  • the device according to the invention is capable of filtering our smaller particles much more efficiently than the prior art ioniser systems.
  • the ionisation system of the invention generates an ion field in use that is more able to charge the particles passing through it in the air flow.
  • the corona generated on application of a voltage to the emitter may be positive or negative. More preferably, the voltage applied to the emitting electrode is between 9 and -9 kV DC, more preferably from 7 to -7 kV DC.
  • air flow is meant the flow of air that passes through the device in use.
  • the air flow may be actively generated in that it is driven by a fan or other such air displacement means, or it is passive in that it is generated by way of the air being directed through the filter while a vehicle comprising such a device is being driven.
  • the air flow may also be driven by a vehicle's air conditioning system.
  • the emitting electrode is in the form of a blade having opposing top and bottom surfaces and opposing edges joining the opposing top and bottom surfaces, at least some of the corona discharge points being disposed on one of said edges.
  • blade By blade is meant a flattened and elongate structure having opposing faces and edges.
  • the blade therefore has a length axis, a breadth axis and a depth axis.
  • the emitting electrode comprises a first array of corona discharge points and a second array of corona discharge points pointing in opposite directions to one another.
  • the emitting electrode comprises a pair of opposing sets of corona discharge points.
  • the ionisation system is electrically configured such that the resulting ion field extends towards the air entering the system, i.e. it is concave with respect to the emitting electrode(s).
  • the corona discharge is shaped to be behind the ionisation system with respect to the airflow.
  • the emitting electrode comprises a pair of opposing arrays of corona discharge points they will product opposing ion fields.
  • the blade and receiving electrode may be disposed such that the depth axis of the emitting electrode points substantially towards the receiving electrode or the closest receiving electrode should there be more than one.
  • the blade and receiving electrode are disposed such that the breadth axis of the emitting electrode points substantially towards the receiving electrode or the closest receiving electrode should there be more than one.
  • the filter medium is a non-woven medium and is configured to attract particles charged by the ionisation system.
  • a vehicle comprising a device according to the second aspect of the invention.
  • a vehicle is preferably an automobile or similar such motor driven vehicle.
  • EP-A-3 205 520 (Volvo) describes a suitable HVAC system into which the invention may be suitably incorporated.
  • an inhabitable dwelling comprising a device according to the first aspect of the invention.
  • an air purifying device comprising a filter and ionisation system according to the first aspect, and a fan, a power source and a housing.
  • the device comprises a filter disposed such that the air passes through the ionisation system before it passes through the filter.
  • Figure 1 shows a device with a centrally disposed emitting electrode (3) and a pair of receiving electrodes (2a) and (2b).
  • the emitting electrode (3) has corona discharge tips (4a) and (4b) pointing towards the receiving electrodes (2a) and (2b).
  • Figure 2 shows the same device seen from the end along cross section A-A' in Figure 1 .
  • Seen are the receiving electrodes (2a) and (2b) and the central blade emitting electrode (3).
  • Figure 3 shows an emitting electrode in the form of a blade (3) and which has corona tips (4a and 4b) extending in opposition directions.
  • Figure 4 shows a pair of receiving electrodes (2a and 2b) and a centrally disposed emitting electrode with corona points (4a and 4b) pointing towards the receiving electrodes (2a and 2b).

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Electrostatic Separation (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

An ionisation system for air purification, said system comprising an emitting electrode and a receiving electrode, the emitting electrode comprising a plurality of corona discharge points.

Description

  • The present invention relates to an ionisation system for an air purifying device and with improved performance.
  • The prior art discloses an air purifying device for a cabin and comprising in parallel an array of circular ionisers each with a centrally disposed corona discharge tip.
  • WO 2013/080078 (Technische Universiteit Delft) discloses apparatus with conductive strip for dust removal. The conductive strip comprises points, which, on application of a voltage generate a corona and, what is described as, an ion wind. Particles from an exhaust are thereby charged and deposited onto the counter electrode and hence the exhaust air is cleaned.
  • EP-A1-3 056 364 (Blue Air AB) discloses a vehicle with an ionising unit for cleaning air to cabin.
  • Despite the prior art there remains a need for more efficient air purifying devices for cabins.
  • Accordingly, and in a first aspect there is provided a device comprising an ionisation system for purifying the air of a substantially enclosed space, said system comprising an emitting electrode and a receiving electrode, the emitting electrode comprising a plurality of corona discharge points, the system further comprising a filter medium adapted to entrain charged particles which have passed through the ionisation system.
  • By substantially enclosed space is meant a cabin, for example of a car or other motor vehicle, an office or a dwelling place.
  • We have surprisingly found that such an arrangement of ionisation system in combination with a particulate filter provides for a more efficient system for an air purifying device.
  • The device according to the invention is capable of filtering our smaller particles much more efficiently than the prior art ioniser systems.
  • The ionisation system of the invention generates an ion field in use that is more able to charge the particles passing through it in the air flow.
  • The corona generated on application of a voltage to the emitter may be positive or negative. More preferably, the voltage applied to the emitting electrode is between 9 and -9 kV DC, more preferably from 7 to -7 kV DC.
  • By air flow is meant the flow of air that passes through the device in use. The air flow may be actively generated in that it is driven by a fan or other such air displacement means, or it is passive in that it is generated by way of the air being directed through the filter while a vehicle comprising such a device is being driven. The air flow may also be driven by a vehicle's air conditioning system.
  • Preferably the emitting electrode is in the form of a blade having opposing top and bottom surfaces and opposing edges joining the opposing top and bottom surfaces, at least some of the corona discharge points being disposed on one of said edges.
  • By blade is meant a flattened and elongate structure having opposing faces and edges. The blade therefore has a length axis, a breadth axis and a depth axis.
  • It is preferred that there is just one emitting electrode and it comprises an array of corona discharge points pointing away from the blade and preferably in substantially the same direction as the breadth axis.
  • More preferably, the emitting electrode comprises a first array of corona discharge points and a second array of corona discharge points pointing in opposite directions to one another.
  • However, it is also possible for there to exist a plurality of emitting electrodes which are electrically separate from one another, but which work together to generate an ion field in use. For example, it is possible for there to be a pair of emitting electrodes, electrically apart from one another, but each comprises a plurality of corona discharge points. In such an embodiment it is possible for the corona discharge points on separate emitter electrodes to point in the same direction or substantially opposite directions.
  • Similarly, it is possible for there to be a single, grounded receiving electrode extending sufficiently around the ionisation system to function as a receiving electrode for corona discharge points extending in opposite directions. However, it is also possible for there to be a plurality of receiving electrodes.
  • Preferably, the emitting electrode comprises a pair of opposing sets of corona discharge points.
  • Preferably, the ionisation system is electrically configured such that the resulting ion field extends towards the air entering the system, i.e. it is concave with respect to the emitting electrode(s). This is more efficient than where the corona discharge is shaped to be behind the ionisation system with respect to the airflow. Where the emitting electrode comprises a pair of opposing arrays of corona discharge points they will product opposing ion fields. In this instance, it is preferred that at least one of the ions fields extends away from the emitting electrode and towards the air entering the device.
  • The blade and receiving electrode may be disposed such that the depth axis of the emitting electrode points substantially towards the receiving electrode or the closest receiving electrode should there be more than one.
  • Preferably, however, the blade and receiving electrode are disposed such that the breadth axis of the emitting electrode points substantially towards the receiving electrode or the closest receiving electrode should there be more than one.
  • Preferably, the filter medium is a non-woven medium and is configured to attract particles charged by the ionisation system.
  • In a second aspect there is provided a vehicle comprising a device according to the second aspect of the invention. Such a vehicle is preferably an automobile or similar such motor driven vehicle. EP-A-3 205 520 (Volvo) describes a suitable HVAC system into which the invention may be suitably incorporated.
  • In a third aspect there is provided an inhabitable dwelling comprising a device according to the first aspect of the invention.
  • In a fourth aspect there is provided an air purifying device comprising a filter and ionisation system according to the first aspect, and a fan, a power source and a housing.
  • Preferably, the device comprises a filter disposed such that the air passes through the ionisation system before it passes through the filter.
    • EXAMPLES
    • Figures 1 and 2 are schematic drawings of a device according to the invention.
    • Figure 3 shows an emitting electrode according to the invention.
    • Figure 4 shows an emitting electrode and receiving electrode arrangement.
    • Figure 5 shows the effect of an embodiment according to the invention versus a comparative design.
  • Figure 1 shows a device with a centrally disposed emitting electrode (3) and a pair of receiving electrodes (2a) and (2b).
  • The emitting electrode (3) has corona discharge tips (4a) and (4b) pointing towards the receiving electrodes (2a) and (2b).
  • Figure 2 shows the same device seen from the end along cross section A-A' in Figure 1.
  • Seen are the receiving electrodes (2a) and (2b) and the central blade emitting electrode (3).
  • In both figures there is shown a housing (1) for the system.
  • Figure 3 shows an emitting electrode in the form of a blade (3) and which has corona tips (4a and 4b) extending in opposition directions.
  • Figure 4 shows a pair of receiving electrodes (2a and 2b) and a centrally disposed emitting electrode with corona points (4a and 4b) pointing towards the receiving electrodes (2a and 2b).

Claims (11)

  1. A device comprising an ionisation system for purifying the air of a substantially enclosed space, said system comprising an emitting electrode and a receiving electrode, the emitting electrode comprising a plurality of corona discharge points, the system further comprising a filter medium adapted to entrain charged particles which have passed through the ionisation system.
  2. Device according to claim 1 wherein the emitting electrode is in the form of a blade having opposing top and bottom surfaces and opposing edges joining the opposing top and bottom surfaces, at least some of the corona discharge points being disposed on one of said edges.
  3. Device according to claim 1 or 2 wherein the emitting electrode and the receiving electrode extend substantially parallel to one another.
  4. Device according to claim 2-3 wherein both of said edges comprise corona discharge points.
  5. Device according to claim 2-4 comprising a pair of receiving electrodes either side of and extending substantially parallel to the emitting electrode.
  6. Device according to claim 5 comprising a pair of receiving electrodes and where one of the pair of opposing sets of corona discharge points extend along said depth axis.
  7. A vehicle comprising a device according to any preceding claim.
  8. An inhabitable dwelling comprising a device according to any of claims 1-6.
  9. An air purifying device comprising a fan, a filter an ionising according to any of claims 1-6 and housing.
  10. A method for purifying the air entering a cabin using a device according to any preceding claim.
  11. A method for removing at least 90% particles up to 0.3 micrometers in diameter in one pass using a design according to any of claims 1-9.
EP18207052.4A 2018-11-19 2018-11-19 Ioniser Withdrawn EP3654465A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18207052.4A EP3654465A1 (en) 2018-11-19 2018-11-19 Ioniser
EP19801927.5A EP3884551A1 (en) 2018-11-19 2019-11-19 An ionizing unit for negatively charging airborne particles present in an airflow, an air-purifying device and a vehicle-adapted device
PCT/EP2019/081856 WO2020104488A1 (en) 2018-11-19 2019-11-19 An ionizing unit for negatively charging airborne particles present in an airflow, an air-purifying device and a vehicle-adapted device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18207052.4A EP3654465A1 (en) 2018-11-19 2018-11-19 Ioniser

Publications (1)

Publication Number Publication Date
EP3654465A1 true EP3654465A1 (en) 2020-05-20

Family

ID=64362441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18207052.4A Withdrawn EP3654465A1 (en) 2018-11-19 2018-11-19 Ioniser

Country Status (1)

Country Link
EP (1) EP3654465A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2595908A (en) * 2020-06-11 2021-12-15 Edwards Ltd Electrostatic precipitator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03204563A (en) * 1989-12-28 1991-09-06 Rinnai Corp Air conditioner
EP1547693A1 (en) * 2003-06-05 2005-06-29 Daikin Industries, Ltd. Discharge apparatus and air purifying apparatus
EP2309198A1 (en) * 2008-06-24 2011-04-13 Daikin Industries, Ltd. Ventilation device
WO2013080078A2 (en) 2011-11-29 2013-06-06 Dpir Ltd An apparatus, module, device and method for shearing objects
EP3056364A1 (en) 2015-02-11 2016-08-17 Blue Air AB Vehicle with ionizing unit for cleaning air to cabin
EP3205520A1 (en) 2016-02-11 2017-08-16 Volvo Car Corporation Air supply arrangement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03204563A (en) * 1989-12-28 1991-09-06 Rinnai Corp Air conditioner
EP1547693A1 (en) * 2003-06-05 2005-06-29 Daikin Industries, Ltd. Discharge apparatus and air purifying apparatus
EP2309198A1 (en) * 2008-06-24 2011-04-13 Daikin Industries, Ltd. Ventilation device
WO2013080078A2 (en) 2011-11-29 2013-06-06 Dpir Ltd An apparatus, module, device and method for shearing objects
EP3056364A1 (en) 2015-02-11 2016-08-17 Blue Air AB Vehicle with ionizing unit for cleaning air to cabin
EP3205520A1 (en) 2016-02-11 2017-08-16 Volvo Car Corporation Air supply arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2595908A (en) * 2020-06-11 2021-12-15 Edwards Ltd Electrostatic precipitator

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