EP4030571A1 - Ionengenerierendes element - Google Patents

Ionengenerierendes element Download PDF

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Publication number
EP4030571A1
EP4030571A1 EP22150174.5A EP22150174A EP4030571A1 EP 4030571 A1 EP4030571 A1 EP 4030571A1 EP 22150174 A EP22150174 A EP 22150174A EP 4030571 A1 EP4030571 A1 EP 4030571A1
Authority
EP
European Patent Office
Prior art keywords
electrode
ring
generating element
ion
flat
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Withdrawn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
EP22150174.5A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dietmar Weisser
Sebastian Dietzel
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.)
Marquardt GmbH
Original Assignee
Marquardt GmbH
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 Marquardt GmbH filed Critical Marquardt GmbH
Publication of EP4030571A1 publication Critical patent/EP4030571A1/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Withdrawn legal-status Critical Current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
    • 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
    • B03C3/60—Use of special materials other than liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/003—Ventilation in combination with air cleaning
    • 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
    • F24F8/30—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by 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
    • H01T19/00—Devices providing for corona discharge

Definitions

  • the present invention relates to a flat electrode for an ion generating element which can effectively prevent generation of ozone when ions are generated, and an ion generating element, an ionization device for treating an air flow and a ventilation system, each having such a flat electrode.
  • Air purification devices which treat and/or remove, for example, indoors by ionizing air and thus generating electrically charged air components, particles, fine dust, viruses, mold and/or spores and providing an air flow enriched with ions.
  • a high ion content, in particular of negative oxygen ions, is also associated with positive properties that are intended to increase a person's well-being.
  • negative oxygen ions should improve the natural defenses, neutralize odors, minimize the risk of allergic reactions, increase the ability to concentrate and have a positive effect on stress resistance.
  • ozone is formed when there is a high-energy discharge in the room (impact ionization). Due to their oxidizing effect, however, ozone molecules are toxic to humans if a value of 0.2 mg/m 3 is exceeded. Even with a lower ozone intake, this is often associated with severe temporal headaches.
  • an ionization apparatus for generating active oxygen ions in the air consisting of one or more ionization apparatuses and a transformer generating high voltage and a sensor unit acting on an electrical control unit, the ionization apparatuses consisting of two or more electrically conductive, flat structures which are connected by a dielectric are separated from each other.
  • Control electronics can be designed in such a way that all ionization devices are operated when the air is very polluted or there is a large amount of air, and only one or no ionization devices are operated when the air is clean, in order to avoid excessive ion production and/or the risk of ozonation.
  • an air conditioner having an ion generator, the ion generator having an ion generating element, and the ion generating element including a dielectric body, an internal electrode formed inside the dielectric body, and a surface electrode formed on a surface of the dielectric body.
  • the surface electrode is formed in a lattice pattern having lattice squares, each lattice square having a pointed portion.
  • EP 0 208 169 B1 discloses an electrostatic high-voltage electrode for ionizing the air with a large number of needle-shaped, non-encapsulated individual electrodes, each with a tip, which are arranged in several rows of the same design, with all the individual electrodes being of the same design, running parallel to one another and their tips lying in one plane , and wherein the individual electrodes of each row are opposite the spaces between the individual electrodes of the respective adjacent row, the individual electrodes are at least half their free length apart and the free length of the electrodes is related to their diameter at least 50:1.
  • the object of embodiments of the invention is to specify a flat electrode for an ion-generating element which generates as little ozone as possible during operation.
  • this object is achieved by a flat electrode for an ion-generating element, the flat electrode comprising ring-shaped electrode structures.
  • Flat electrodes are understood to be electrodes that are spatially flat, that is to say have a low height. Such flat electrodes are used, for example, in ion-generating elements.
  • Ion-generating elements are also used to generate ionized air components, in particular by means of ionization voltage or high voltage.
  • the ion-generating element uses a high voltage in a range from 1.5 kV to 15 kV, for example.
  • the ion-generating element can be connected in particular to a high-voltage generation unit, such as a transformer, a piezoelectric transformer, a flyback converter and/or a high-voltage cascade.
  • a high-voltage generation unit such as a transformer, a piezoelectric transformer, a flyback converter and/or a high-voltage cascade.
  • a high-voltage generation unit such as a transformer, a piezoelectric transformer, a flyback converter and/or a high-voltage cascade.
  • an electrical discharge of the ionization voltage into the surrounding air and thus an ionization of the air components takes place.
  • the ions can be generated, for example, by corona discharge and/or field emission into the
  • the flat electrode comprises ring-shaped electrode structures also means that the flat electrode is formed from individual, connected circular electrode structures which have no edges or points, the individual circular electrode structures preferably having the shape of concentric ring cross-sections.
  • Such a flat electrode has the advantage that, compared to conventional flat electrodes for ion-generating elements, for example flat electrodes formed by net or grid-like electrode structures, it has a lower field strength and thus impact ionization is avoided and less ozone is formed.
  • the density of electric field lines and thus also the electric field strength is usually greatest at the tips of electrical conductors or electrodes that are under high voltage. It comes just below the breakdown voltage to a glow discharge that is so strong that the bond between oxygen molecules is broken and ozone is formed. Since the electrode according to the invention is formed from individual, connected, circular electrode structures which have no edges or points, such high-energy discharges and the formation of ozone associated therewith can be effectively avoided. Furthermore, this also results in less electrode erosion, so that the service life of the flat electrode is increased.
  • the ring-shaped electrode structures are also formed from an electrode material that actively splits ozone catalytically.
  • a catalytically active material accelerates a chemical reaction, in particular a catalysis, without being consumed in the process.
  • the flat electrode is formed from an electrode material that actively splits ozone catalytically, ozone produced during the generation of ions can be split and broken down without the electrode material being used up and the service life of the flat electrode being reduced.
  • the ring-shaped electrode structures can be formed from platinum or palladium.
  • platinum or palladium as the electrode material, a high catalytic effect is achieved even at low temperatures.
  • a metal oxide layer is arranged inside at least some of the ring-shaped electrode structures.
  • the metal oxide layer is in each case arranged within a region surrounded by and delimited by the corresponding ring-shaped electrode structure.
  • Metal oxides in particular transition metal oxides, such as manganese oxide, iron oxide, cobalt oxide, copper oxide, or nickel oxide are also known as catalytically active materials in the decomposition or splitting of ozone and are used in pure form or as a mixture as a catalytically active component in catalysts, for example in the form of bulk material -Supported catalysts used to decompose ozone. Total can thus the splitting and degradation of ozone created during the generation of ions can be further optimized.
  • the ring-shaped electrode structures can also each be at least partially covered by a dielectric cover in such a way that plasma is formed mainly in the interior of the ring-shaped electrode structures.
  • a dielectric cover is understood to mean a dielectric barrier which spatially limits the discharge and the generation of ions during operation.
  • Typical materials for such a dielectric barrier are glass, quartz, ceramics or enamel. Plastics such as Teflon or silicone can also be used.
  • the dielectric cover is arranged in such a way that the plasma is mainly, i.e. essentially or largely, created within an area which is surrounded and delimited by the corresponding electrode structure, i.e. ions mainly are generated within this area and at least most of the ion generation takes place in this area.
  • a further embodiment of the invention also specifies an ion-generating element for generating ions by means of an ionization voltage, which element has a flat electrode as described above and a ground electrode.
  • the ground electrode is a grounded electrode. If a high voltage is applied to the flat electrode, an electric field is generated at the other end of the earthed ground electrode. This results in the creation of a plasma discharge and the ionization of molecules in the air, which can produce positive and negative ions.
  • Such an ion-generating element has the advantage that it has a flat electrode, which has a lower field strength compared to conventional flat electrodes for ion-generating elements, for example flat electrodes, which are formed by net or grid-like electrode structures and thus impact ionization is avoided and less ozone is formed becomes.
  • the density of electric field lines and thus also the electric field strength is usually greatest at the tips of electrical conductors or electrodes that are under high voltage.
  • a glow discharge occurs just below the breakdown voltage, which is so strong that the bond between oxygen molecules is broken and ozone is formed. Since the electrode according to the invention is formed from individual, cohesive, circular electrode structures which have no edges or points, such discharges and the formation of ozone associated therewith can be effectively avoided. Furthermore, this also results in less electrode erosion, so that the service life of the flat electrode is increased.
  • the ground electrode can be of linear design.
  • ground electrode is linear means that the ground electrode is not solid as a block-shaped electrode but is linear and in particular has a meandering structure.
  • the ground electrode may be formed of a resistance alloy.
  • resistance alloys are understood to be alloys of two or more metals which have a relatively high specific electrical resistance, have a low tendency to oxidize and convert electrical energy into heat.
  • the resistance alloy can be, for example, a silver-palladium alloy such as Ag 3 Pd or Ag 6 Pd.
  • a further embodiment of the invention also specifies an ionization device for treating an air flow, the ionization device having a supply air connection for feeding an air flow into the ionization device, an ion-generating element as described above for ionizing air components of the air flow by means of an ionization voltage, and a return air connection for returning the treated air flow from the ionization device.
  • Such an ionization device has the advantage that it has a flat electrode which has a lower field strength compared to conventional flat electrodes for ion-generating elements, for example flat electrodes which are formed by net-like or lattice-like electrode structures, and thus impact ionization is avoided and less ozone is formed .
  • the density of electric field lines and thus also the electric field strength is usually greatest at the tips of electrical conductors or electrodes that are under high voltage.
  • a glow discharge occurs just below the breakdown voltage, which is so strong that the bond between oxygen molecules is broken and ozone is formed. Since the electrode according to the invention is formed from individual, cohesive, circular electrode structures which have no edges or points, such discharges and the formation of ozone associated therewith can be effectively avoided. Furthermore, this also results in less electrode erosion, so that the service life of the flat electrode is increased.
  • a further embodiment of the invention also specifies a ventilation system which has an ionization device as described above.
  • Such a ventilation system has the advantage that it has a flat electrode, which has a lower field strength compared to conventional flat electrodes for ion-generating elements, for example flat electrodes, which are formed by net or lattice-shaped electrode structures and thus impact ionization is avoided and less ozone is formed .
  • the density of electric field lines, and thus also the electric field strength is usually under high voltage at peaks standing electrical conductors or electrodes is largest.
  • a glow discharge occurs just below the breakdown voltage, which is so strong that the bond between oxygen molecules is broken and ozone is formed. Since the electrode according to the invention is formed from individual, cohesive, circular electrode structures which have no edges or points, such discharges and the formation of ozone associated therewith can be effectively avoided. Furthermore, this also results in less electrode erosion, so that the service life of the flat electrode is increased.
  • the ventilation system can be, for example, a ventilation system for a closed room, a vehicle, or for a cabin of an airplane.
  • the present invention provides a flat electrode for an ion-generating element, with which the formation of ozone can be effectively avoided when ions are generated.
  • the effect of avoiding the formation of ozone can also be further enhanced by using special materials and/or catalytic substances or actively catalytic materials.
  • FIG. 1 shows a schematic perspective view of an ion-generating element 1 according to embodiments of the invention.
  • the ion-generating element 1 has an ion-generating element, which is according to the embodiments of figure 1 is a flat electrode 4 arranged on a top side 2 of the ion-generating element 1 and in particular on a surface of a dielectric body 3, for example a ceramic dielectric.
  • the flat electrode 4 is connected via an insulated electrical conductor 5, for example a cable with an in figure 1 not shown, connected to power supply.
  • the flat electrode 4 can also be equipped with an in figure 1 not shown control and regulation unit and an in figure 1 not shown be connected data interface.
  • the ion-generating element according to the embodiments of figure 1 one arranged in the dielectric body 3, in figure 1 ground electrode, not shown, which is connected to a ground potential via corresponding connections 6 and is thus grounded.
  • ozone is formed when there is a high-energy discharge in the room (impact ionization). Due to their oxidizing effect, however, ozone molecules are toxic to humans if a value of 0.2 mg/m 3 is exceeded. Already at a lower Ozone intake is also often associated with severe headaches in the temples.
  • the flat electrode 3 comprises ring-shaped electrode structures 7 or this flat electrode 3 is formed from connected, ring-shaped electrode structures 7 .
  • Such a flat electrode 3 has the advantage that it has a lower field strength compared to conventional flat electrodes for ion-generating elements, for example flat electrodes which are formed by net or grid-like electrode structures, and impact ionization is thus avoided and less ozone is also formed.
  • the density of electric field lines and thus also the electric field strength is usually greatest at the tips of electrical conductors or electrodes that are under high voltage.
  • a glow discharge occurs just below the breakdown voltage, which is so strong that the bond between oxygen molecules is broken and ozone is formed. Since the electrode according to the invention is formed from individual, connected, circular electrode structures which have no edges or points, such high-energy discharges and the formation of ozone associated therewith can be effectively avoided. Furthermore, this also results in less electrode erosion, so that the service life of the flat electrode is increased.
  • the ion-generating element 1 can also, in figure 1 be downstream not shown catalytic mechanical components, such as activated carbon or a corresponding metal mesh.
  • FIG. 12 shows a top view of the ion generating element according to FIG figure 1 .
  • Components and parts with the same function or construction as in figure 1 have the same reference numbers and are not discussed separately.
  • the flat electrode 4 is formed by connected, ring-shaped electrode structures 7 .
  • the ring-shaped electrode structures 6 are formed from an electrode material which actively splits ozone catalytically.
  • the ring-shaped structures 7 are preferably formed from platinum or palladium with a layer thickness of between 5 ⁇ m and 14 ⁇ m.
  • FIG. 12 shows a plan view of a ground electrode 8 of the ion generating element 1 according to FIG figure 1 .
  • Components and parts with the same function or construction as in figure 1 have the same reference numbers and are not discussed separately.
  • a further electrode in particular a ground electrode 8 , is embedded in the dielectric body 3 of the ion-generating element 1 .
  • the ground electrode 8 is in the form of a line, in particular a meandering shape.
  • the ground electrode 8 is also formed from a resistance alloy and in particular from a silver-palladium alloy such as Ag 3 PD or Ag 6 PD with a layer thickness between 8 ⁇ m and 17 ⁇ m,
  • FIG. 1 shows a plan view of an annular electrode structure 10 without a metal oxide layer.
  • the flat electrode according to the invention thus comprises ring-shaped electrode structures, with a ring-shaped electrode structure 10 in figure 4 is shown.
  • the ring-shaped electrode structure 10 is formed in the form of a concentric ring cross-section.
  • a dielectric cover 11 is applied to the ring-shaped electrode structure 10 or the ring-shaped electrode structure 10 is covered by a dielectric cover 11 in such a way that plasma is mainly formed in the interior of the ring-shaped electrode structure 10 during operation.
  • the entire outer area 12 of the ring-shaped electrode structure 10 is covered with the dielectric cover 11 or the dielectric barrier.
  • Typical materials for such a dielectric cover 11 are glass, quartz, ceramics or enamel. Plastics, for example Teflon or silicone, can also be used, with the dielectric cover 11 preferably having a layer thickness of between 9 ⁇ m and 20 ⁇ m.
  • FIG. 1 shows a plan view of an annular electrode structure 20 with a metal oxide layer.
  • the ring-shaped electrode structure 20 is again formed in the form of a concentric ring cross-section.
  • the ring-shaped electrode structure 20 is in turn covered by a dielectric cover 21 in such a way that plasma is formed mainly inside the ring-shaped electrode structure 20 .
  • first embodiment is inside the in figure 5 Ring-shaped electrode structure 20 shown, that is, a region 22 which is surrounded by ring-shaped electrode structure 20 or is delimited by this 20, a metal oxide layer 23 is arranged.
  • the metal oxide can be, in particular, a transition metal oxide such as manganese oxide, iron oxide, cobalt oxide, copper oxide or nickel oxide.
  • Such metal oxides are also known as catalytically active materials in the decomposition or splitting of ozone and are used in pure form or as a mixture as a catalytically active component in catalysts, for example in the form of bulk material supported catalysts for the decomposition of ozone. Overall, the splitting and decomposition of ozone formed during the generation of ions can thus be further optimized.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
EP22150174.5A 2021-01-13 2022-01-04 Ionengenerierendes element Withdrawn EP4030571A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021200266.8A DE102021200266A1 (de) 2021-01-13 2021-01-13 Ionengenerierendes Element

Publications (1)

Publication Number Publication Date
EP4030571A1 true EP4030571A1 (de) 2022-07-20

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Application Number Title Priority Date Filing Date
EP22150174.5A Withdrawn EP4030571A1 (de) 2021-01-13 2022-01-04 Ionengenerierendes element

Country Status (3)

Country Link
EP (1) EP4030571A1 (zh)
CN (1) CN217589774U (zh)
DE (1) DE102021200266A1 (zh)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0208169B1 (de) 1985-06-26 1989-05-24 Eltex-Elektrostatik Gesellschaft mbH Hochspannungselektrode
EP0634205A1 (de) 1993-07-15 1995-01-18 DODUCO GMBH + Co Dr. Eugen DÀ¼rrwächter Katalysator zum Spalten von Ozon
DE19651402A1 (de) 1996-12-11 1998-06-18 T E M Tech Entwicklung Und Man Apparat zur physikalischen Aufbereitung von Luft, insbesondere von Atemluft
JP2004335411A (ja) * 2003-05-12 2004-11-25 Takasago Thermal Eng Co Ltd イオン発生素子及び除菌方法
DE60207725T2 (de) 2001-08-07 2006-08-03 Sharp K.K. Ionengenerierendes element und dieses beinhaltender ionengenerator, klimaanlage, reiniger und kühlgerät
EP2033664A1 (en) * 2000-05-18 2009-03-11 Sharp Kabushiki Kaisha Sterilization method, ion generating element, ion generating device, and air conditioning device
EP2974783A1 (en) * 2014-07-16 2016-01-20 LG Electronics Inc. Plasma electrode device and air conditioning apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4551977B1 (ja) 2010-01-26 2010-09-29 明夫 片野 イオン・オゾン風発生装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0208169B1 (de) 1985-06-26 1989-05-24 Eltex-Elektrostatik Gesellschaft mbH Hochspannungselektrode
EP0634205A1 (de) 1993-07-15 1995-01-18 DODUCO GMBH + Co Dr. Eugen DÀ¼rrwächter Katalysator zum Spalten von Ozon
DE19651402A1 (de) 1996-12-11 1998-06-18 T E M Tech Entwicklung Und Man Apparat zur physikalischen Aufbereitung von Luft, insbesondere von Atemluft
EP2033664A1 (en) * 2000-05-18 2009-03-11 Sharp Kabushiki Kaisha Sterilization method, ion generating element, ion generating device, and air conditioning device
DE60207725T2 (de) 2001-08-07 2006-08-03 Sharp K.K. Ionengenerierendes element und dieses beinhaltender ionengenerator, klimaanlage, reiniger und kühlgerät
JP2004335411A (ja) * 2003-05-12 2004-11-25 Takasago Thermal Eng Co Ltd イオン発生素子及び除菌方法
EP2974783A1 (en) * 2014-07-16 2016-01-20 LG Electronics Inc. Plasma electrode device and air conditioning apparatus

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Publication number Publication date
CN217589774U (zh) 2022-10-14
DE102021200266A1 (de) 2022-07-14

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