EP2786769B1 - Electrically isolated filter unit made of synthetic material and ioniser for electrostatic precipitation of particulates in ventilation ducts - Google Patents

Electrically isolated filter unit made of synthetic material and ioniser for electrostatic precipitation of particulates in ventilation ducts Download PDF

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Publication number
EP2786769B1
EP2786769B1 EP14156076.3A EP14156076A EP2786769B1 EP 2786769 B1 EP2786769 B1 EP 2786769B1 EP 14156076 A EP14156076 A EP 14156076A EP 2786769 B1 EP2786769 B1 EP 2786769B1
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Prior art keywords
filter
unit
air
unit according
separator unit
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EP14156076.3A
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German (de)
French (fr)
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EP2786769A1 (en
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Helmut Dipl.-Ing. Siegmund
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    • 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
    • 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
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
    • 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
    • B03C3/38—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
    • 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
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • 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
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • 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
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/183—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by centrifugal separation, e.g. using vortices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/39—Monitoring filter performance

Definitions

  • filters are often used one behind the other. Overcoming the air resistance of existing in an air conditioner filter stages or an added filter usually cause 30 - 60% of the total drive energy required.
  • Other methods utilize the capability of special conductive plastic filter material to retain the particulate matter in the filter via electrostatic precipitation. Other methods use ionizers to bind fine dust in front of the filter on the ventilation duct and in the filter by electrostatic attraction.
  • filters to improve the degree of separation through their additional increased electrostatic charge by means of special plastic fabric, so-called electret filter.
  • electret filter usually polypropylene fibers, have a permanent electrical surface charge, without supplying electrical energy, and lead to an improved attachment of charged fine particles and dusts.
  • FR 2 928 272 A1 discloses a separation unit having the features of the preamble of claim 1.
  • Filter methods based on electrostatic filter material have the disadvantage that the power decreases in proportion to the degree of separation.
  • the deposition of particles on the electrically conductive material increases its electrical Resistance.
  • the material is practically isolated with the structure of the particle layer.
  • methods and technical solutions use upstream ionization units. This leads to two other unwanted effects. First, fine dust in the immediate vicinity of the ion generator by the construction of an electric field to the channel wall, which is practically grounded, sedimented on the channel, resulting in an increased effort of the channel cleaning and a strong impairment of the sanitary condition of the system. Furthermore, an electric field builds up between the ion generators and the channel in such a way that a capacitor effect arises on the channel wall.
  • the resulting voltages can be well over 20,000 V (20 kV). For health and safety reasons, this is not permitted.
  • the charging voltage of the channel increases in the second power with the reduction of the diameter, ie the distance from the ion generator to the wall. Especially with air ducts for small systems such as residential ventilation or branched networks uncontrolled discharges can occur over the channel to the environment. Furthermore, this effect means that the charging of the channel considerable power, which is actually required for the charging of the air flow and the particles contained therein, lost.
  • the object of the invention is to increase the degree of separation of air filters made of synthetic material and thus the performance in terms of the deposition of fine dust by their electrostatic attraction using previous electrostatic charge so that the actually air-bearing Channel is charged only slightly or not electrically and for air resistance reduction, a filter can be used, which manages compared to conventional, otherwise necessary higher filter classes, with much larger mesh sizes and thereby electrostatic precipitates particles that can otherwise only be filtered out mechanically over smaller mesh sizes.
  • the object is achieved by the features specified in claim 1.
  • a charging unit for electrostatic charging of the room air is arranged so that a voltage difference between the now charged air flow and the filter material, which consists of synthetic, devisannifestITAdem Material exists.
  • the voltage difference can be achieved by separately grounding the filter material or by applying a Jacobpoles to the electrostatic charging unit of the air by generating an electric field between the charging unit and filter.
  • the peculiarity is that when a counter-pole is applied, it can be regulated or coupled with the voltage generation of the generator of the electrostatic field and controlled so that the electrical surface tension of the synthetic filter material does not fluctuate more than +/- 30% relative to the initial state and thus the insulation effect is compensated by separated fine dusts on the filter material.
  • the channel from the electrostatic field generator, preferably an ionizer, to the mechanical filter is lined or made entirely of at least one electrically insulating and little or no conductive material or a material having a rectified charge such as the electrostatic charging unit such material, so that no capacitor effect on the air duct occurs.
  • the entire construction can be used as an independent assembly in an existing one Channel inserted or an existing channel can be modified to this effect.
  • the separation efficiency is maintained almost independently of the already deposited filter cake.
  • the material for the air filter e.g. Polypropylene, glass fiber fleece or polyester fleece can be used.
  • Advantage of the invention is that by the electrically neutral or rectified in their charge channel wall of the otherwise always occurring capacitor effect is not or only significantly reduced, is present and deposit less dust particles, especially fine dust by electrostatics on it.
  • Another advantage of the solution according to the invention is that the fine dust deposited by electrostatics on the surface-conductive plastic material of the filter and this deposition effect by the field structure between electrostatic charging unit, which is preferably an ion generator, and filter due to the isolation of the filter against the channel wall and the additional grounding of the filter or the connection of a counterpole to the ion generator to the filter by at least a factor of 2 is increased.
  • electrostatic charging unit which is preferably an ion generator
  • Fig. 1 shows the installation in a ventilation duct with insulation and opposite charging of the filter material to the ion generator.
  • a ventilation duct 1 is an applied to the wall used, electrically non-conductive and the ventilation duct 1 over a distance from the ionization unit 3 to the removable air filter 2 against the ionizer 3 insulating material 6.
  • the ionization unit 3 is a power unit (power supply, Voltage source) 4 upstream, with only the negatively charged output 8 is connected to the ionization unit.
  • the positive output 7 is placed directly on the air filter 2, so that builds up an electric field between the ionization unit 3 and the air filter due to the voltage difference and the air filter material by its opposite charge to the ionizer and thereby electrically charged in the supply air particles and particulate matter attracts.
  • the power unit 4 is followed by a control or regulating unit 5, which on the one hand can measure the voltage difference between the ionization unit 3 and the air filter 2 and can reduce this voltage difference by reducing the power of the power unit 4 of the ionizer by reducing this by fine dust deposits.
  • the replaceable air filter 2 is protected by the installation in the insulating material 6 against discharge to the ventilation duct 1.
  • Fig. 2 shows the installation in a ventilation duct with simple insulation and earthing of the filter material.
  • a ventilation duct 1 is an applied to the wall used, electrically non-conductive and the ventilation duct 1 over a distance from the ionization unit 3 to the removable air filter 2 against the ionizer 3 insulating material 6.
  • the ionization unit 3 is a power unit (power supply, Voltage source) 4 upstream, with only the negatively charged output 8 is connected to the ionization unit.
  • the replaceable air filter 2 is protected by the installation in the insulating material 6 against discharge to the ventilation duct 1 and discharges only via the grounding to the ventilation duct 1 9th
  • Fig. 3 shows the installation in a ventilation device for home ventilation with insulation and grounding of the filter material.
  • outside air 10 is sucked through a ventilation duct 1 through a ventilation unit with a cross-flow heat exchanger 14 into a building and fed to the room as conditioned supply air 11 via a cavity floor 15 or air duct.
  • the required air filter 2 of synthetic material is designed as a compact filter ion unit 19, consisting of the actual air filter 2, an electrical insulation 6, an air filter earthing 9, an ionization unit 3, and a power unit 4 with a negative current output 8 and anchored in the channel 1.
  • the air filter 2 itself is designed to be changeable.
  • This compact filter ion unit 19 charges fine dust particles electrostatically so that they are securely bound in the filter by electrostatic deposition on the filter fabric.
  • the exhaust air 12 of the room is guided via the ventilation system and the cross-flow heat exchanger 14 as exhaust air to the outside.
  • the filter ion unit 19 secures by their increased separation efficiency that a filter material with a larger mesh size can be used and thus the power consumption of the fan 20 fails lower, which energy can be saved at the same or increased air quality of the supply air 11.
  • Fig. 4 shows the installation in a ventilation unit for domestic ventilation with insulation and grounding of the filter material to relieve a buried supply air duct.
  • outside air 10 is sucked into a building via a first buried and therefore difficult to access ventilation duct 16 through a ventilation unit with a cross-flow heat exchanger 14 and the space supplied as treated supply air 11 via a cavity floor 15 or air duct.
  • the required air filter 2 of synthetic material is designed as a compact filter ion unit 19, consisting of the actual air filter 2, an electrical insulation 6, an air filter earthing 9, an ionization unit 3, and a power unit 4 with a negative current output 8 and anchored in the channel 1.
  • the air filter 2 itself is designed to be changeable.
  • This compact filter ion unit 19 is mounted in the intake dome 17 at the entrance of the duct 16.
  • the filter ion unit 19 charges fine dust particles electrostatically so that they are securely bound in the filter by electrostatic deposition on the filter fabric.
  • the necessary power supply of the ion unit is self-sufficient, in this case via a photovoltaic system with energy storage, similar to the principle of operation of solar lights or by conventional power supply.
  • Fig. 5 shows the installation as a compact unit in a ventilation duct with insulation to the sewer pipe wall, electrically rectified charging the inside of the compact unit to the electric charging unit, preferably an ionizer and the grounding of the filter material.
  • a ventilation duct 1 is an applied to the wall used, electrically non-conductive and the ventilation duct 1 over a distance from the ionization unit 3 to the removable air filter 2 against the ionizer 3 insulating material 6.
  • the air-conducting inside of the insulating material 6 is a electrically conductive layer 22 and has the same charge or voltage as the electric charging unit, which is designed as ionization unit 3.
  • the ionization unit 3 is preceded by a power section 4, wherein only the negatively charged output 8 is connected to the ionization unit and the electrically conductive layer 22.
  • the electrically conductive layer 22 on the insulating material 6 has no mechanical or electrical contact with the interchangeable air filter 2.
  • the removable air filter 2 is protected by the installation in the insulating material 6 against discharge to the ventilation duct 1 and discharges only to the ventilation duct isolated grounding.

Description

Bislang wurden Fein- und Feinststäube mit Partikelgrößen < 2,5 µm mechanisch nur mit großem Aufwand aus dem Luftstrom einer Lüftungsanlage und der zur Lüftungsanlage führenden Außenluftansaugung gefiltert. Dabei kommen Filter zum Einsatz, deren Maschenweite ein Passieren der Feinstäube möglich macht. Die Filterleistung ist somit hauptsächlich durch die Maschenweite des Filtergewebes und deren Gestaltung (Taschen, Paneele oder Kassetten) gegeben. Kleinere Partikel als die Maschenweite (ff. auch Porengröße genannt) werden mit dem Luftstrom in den Raum getragen und führen dort zu einer Belastung der Raumluft. Zudem kommt durch den Aufbau eines sogenannten Filterkuchens hinzu, dass sich der Filter allmählich zusetzt, der Druckverlust des Filters ansteigt und der durch den Ventilator geförderte Volumenstrom abnimmt oder eine entsprechend höhere Antriebsleistung zur Aufrechterhaltung des Volumenstromes benötigt wird. Um eine annähernd hygienische Filterleistung zu gewähren, werden oft Filter hintereinander eingesetzt. Die Überwindung des Luft-Widerstandes der in einer Klimaanlage vorhandenen Filterstufen oder eines zugesetzten Filters verursachen in der Regel 30 - 60 % der gesamten notwendigen Antriebsenergie. Andere Verfahren nutzen die Fähigkeit von speziellem Filtermaterial aus leitfähigem Kunststoff, um über die elektrostatische Abscheidung die Feinstäube im Filter zu halten. Wieder andere Verfahren setzen lonisatoren ein, um Feinstäube vor dem Filter auf dem Lüftungskanal sowie im Filter durch elektrostatische Anziehungskraft zu binden.So far, fine and ultrafine dusts with particle sizes <2.5 μm have been mechanically filtered only with great effort from the air flow of a ventilation system and the outside air intake leading to the ventilation system. Filters are used whose mesh size makes it possible to pass the fine dust. The filter performance is thus mainly given by the mesh size of the filter fabric and their design (bags, panels or cassettes). Smaller particles than the mesh size (also referred to as pore size) are carried with the air flow into the room and lead there to a load on the room air. In addition, the construction of a so-called filter cake adds that the filter gradually becomes clogged, the pressure loss of the filter increases and the volume flow conveyed by the fan decreases or a correspondingly higher drive power is required to maintain the volume flow. In order to provide an approximately hygienic filter performance, filters are often used one behind the other. Overcoming the air resistance of existing in an air conditioner filter stages or an added filter usually cause 30 - 60% of the total drive energy required. Other methods utilize the capability of special conductive plastic filter material to retain the particulate matter in the filter via electrostatic precipitation. Other methods use ionizers to bind fine dust in front of the filter on the ventilation duct and in the filter by electrostatic attraction.

Sind schwer zugängige Zuluftkanäle vorhanden, wie z.B. erdverlegte Rohre oder eingemauerte Luftleitungen, ist es außerdem nur mit erheblichem Aufwand möglich, diese einer Reinigung zu unterziehen, wenn vorgeschaltete Filter ihre Leistung nicht mehr erreichen oder Partikel passieren lassen.If hard to reach supply air ducts are present, such as buried pipes or built-in air ducts, it is also only possible with considerable effort to subject them to cleaning, if upstream filters can no longer reach their capacity or allow particles to pass.

So wird In DE 10007523 eine Ionisationsanlage für Lüftungsanlagen beschrieben, bei welcher lediglich die Ionisationsstärke anhand von Regelgrößen auf den notwendigen Bedarf an dem Raum zuzuführenden Ionen eingestellt wird. Dieselbe Zielgröße, nämlich dem Raum eine definierte Ionenmenge zuzuführen, ohne die Wirkung auf die Filterleistung zu beachten oder zu betrachten führt EP000001440695B1 an.This is how In DE 10007523 an ionization system for ventilation systems described in which only the ionization strength is adjusted by means of controlled variables to the necessary demand for the room to be supplied ions. The same target size, namely to supply the room with a defined amount of ions, without paying attention to the effect on the filter performance or to consider EP000001440695B1 at.

Wieder andere Verfahren und technische Ausführungen nutzen bei Filtern die Verbesserung des Abscheidegrades durch deren zusätzlich erhöhte elektrostatische Aufladung mittels spezieller Kunststoffgewebe, sogenannte Elektretfilter. Diese, meist Polypropylenfasern, weisen eine permanentelektrische Oberflächenladung, ohne Zuführung elektrischer Energie, auf und führen zu einer verbesserten Anlagerung von geladenen Feinpartikeln und Stäuben.Still other methods and technical designs use filters to improve the degree of separation through their additional increased electrostatic charge by means of special plastic fabric, so-called electret filter. These, usually polypropylene fibers, have a permanent electrical surface charge, without supplying electrical energy, and lead to an improved attachment of charged fine particles and dusts.

Wieder andere Verfahren oder technische Ausführungen versuchen durch dem Elektretmaterial eingewebte oder beidseitig anliegende metallische und elektrisch leitende Fasern mittels Ionisation einen erhöhten Speichereffekt zu erzielen, wie in DE000002732491A1 beschrieben. Allen gemeinsam ist, dass entweder die Kleinionen in möglichst hoher Konzentration dem Raum zugeführt werden, was Luftwiderstände wie Filter praktisch ausschließt, oder dass bei vorhandenen elektrostatischen Filtern aus speziellem elektrostatischem Material durch direkten mechanischen Kontakt mit Ionisationseinheiten versucht wird, eine höhere Abscheideleistung zu erzielen.Still other methods or technical embodiments try to achieve an increased memory effect by means of ionization by the metallized and electrically conductive fibers, which are woven through the electret material or abutting both sides, as in US Pat DE000002732491A1 described. Common to all is that either the small ions in the highest possible concentration are supplied to the room, which virtually eliminates air resistance such as filters, or that is trying to achieve a higher separation efficiency with existing electrostatic filters made of special electrostatic material by direct mechanical contact with ionization.

FR 2 928 272 A1 offenbart eine Abscheideeinheit mit den Merkmalen des Oberbegriffs von Anspruch 1. FR 2 928 272 A1 discloses a separation unit having the features of the preamble of claim 1.

Filterverfahren auf Basis von elektrostatischem Filtermaterial haben den Nachteil, dass die Leistung proportional mit dem Abscheidegrad sinkt. Durch die Ablagerung von Partikeln auf dem elektrisch leitfähigen Material erhöht sich dessen elektrischer Widerstand. Das Material wird mit dem Aufbau der Partikelschicht praktisch isoliert. Um diesen Nachteil zu umgehen, nutzen Verfahren und technische Lösungen vorgeschaltete Ionisationseinheiten. Dies führt zu zwei weiteren nicht erwünschten Effekten. Zunächst werden Feinstäube in unmittelbarer Nähe der lonenerzeuger durch den Aufbau eines elektrischen Feldes zur Kanalwandung, die praktisch geerdet ist, auf dem Kanal sedimentiert, was zu einem erhöhten Aufwand der Kanalreinigung sowie zu einer starken Beeinträchtigung des hygienischen Zustandes der Anlage führt. Weiterhin baut sich zwischen den Ionenerzeugern und dem Kanal ein elektrisches Feld so auf, dass ein Kondensatoreffekt an der Kanalwandung entsteht. Die dabei auftretenden Spannungen können weit über 20.000 V (20 kV) betragen. Aus Gründen des Gesundheits- und Arbeitsschutzes ist dies nicht zulässig. Zudem steigt die Ladespannung des Kanals in der 2. Potenz mit der Reduzierung des Durchmessers, also des Abstandes von Ionenerzeuger zur Wandung. Insbesondere bei luftführenden Kanälen für Kleinanlagen wie Wohnraumtüftung oder verzweigten Netzen können unkontrollierte Entladungen über den Kanal zur Umgebung auftreten. Weiterhin führt dieser Effekt dazu, dass durch die Aufladung des Kanals erhebliche Leistung, welche eigentlich für die Aufladung des Luftstromes und der darin enthaltenen Partikel vonnöten ist, verloren geht.Filter methods based on electrostatic filter material have the disadvantage that the power decreases in proportion to the degree of separation. The deposition of particles on the electrically conductive material increases its electrical Resistance. The material is practically isolated with the structure of the particle layer. To avoid this disadvantage, methods and technical solutions use upstream ionization units. This leads to two other unwanted effects. First, fine dust in the immediate vicinity of the ion generator by the construction of an electric field to the channel wall, which is practically grounded, sedimented on the channel, resulting in an increased effort of the channel cleaning and a strong impairment of the sanitary condition of the system. Furthermore, an electric field builds up between the ion generators and the channel in such a way that a capacitor effect arises on the channel wall. The resulting voltages can be well over 20,000 V (20 kV). For health and safety reasons, this is not permitted. In addition, the charging voltage of the channel increases in the second power with the reduction of the diameter, ie the distance from the ion generator to the wall. Especially with air ducts for small systems such as residential ventilation or branched networks uncontrolled discharges can occur over the channel to the environment. Furthermore, this effect means that the charging of the channel considerable power, which is actually required for the charging of the air flow and the particles contained therein, lost.

Die Verwendung grobmaschiger Filter, aufgrund der gewollten Reduzierung der Lüfterleistung oder nicht kontinuierlich arbeitender Elektretfilter vor z.B. erdverlegten Luftleitungen, führt zu einer Verschmutzung und letztlich Verkeimung dieser.The use of coarse mesh filters due to the intentional reduction in fan power or non-continuous electret filters before e.g. buried air ducts, leads to pollution and ultimately microbial contamination.

Aufgabe der Erfindung ist es, den Abscheidegrad von Luftfiltern aus synthetischem Material und damit die Leistungsfähigkeit hinsichtlich der Abscheidung von Feinstäuben durch deren elektrostatische Anziehungskraft unter Nutzung vorangehender elektrostatischer Aufladung so zu erhöhen, dass der eigentlich luftführende Kanal nur gering oder nicht elektrisch aufgeladen wird und zur Luftwiderstandsreduzierung ein Filter eingesetzt werden kann, der gegenüber herkömmlichen, sonst notwendigen höheren Filterklassen, mit wesentlich größeren Maschenweiten auskommt und dabei elektrostatisch Partikel abscheidet, die sonst nur mechanisch über geringere Maschenweiten herausgefiltert werden können.The object of the invention is to increase the degree of separation of air filters made of synthetic material and thus the performance in terms of the deposition of fine dust by their electrostatic attraction using previous electrostatic charge so that the actually air-bearing Channel is charged only slightly or not electrically and for air resistance reduction, a filter can be used, which manages compared to conventional, otherwise necessary higher filter classes, with much larger mesh sizes and thereby electrostatic precipitates particles that can otherwise only be filtered out mechanically over smaller mesh sizes.

Erfindungsgemäß wird die Aufgabe durch die in Anspruch 1 angegebenen Merkmale gelöst. In einem luftführenden Kanal, in welchem in Luftstromrichtung ein Filter aus synthetischem Material zur mechanischen Abscheidung von Staubpartikeln angeordnet ist, ist eine Aufladungseinheit zur elektrostatischen Aufladung der Raumluft so vorgeordnet, dass eine Spannungsdifferenz zwischen dem nunmehr geladenen Luftstrom und dem Filtermaterial, welches aus synthetischem, oberflächenleitendem Material besteht, vorliegt. Die Spannungsdifferenz kann durch gesonderte Erdung des Filtermaterials oder durch Aufschaltung eines Gegenpoles zur elektrostatischen Aufladungseinheit der Luft durch Erzeugung eines elektrischen Feldes zwischen Aufladungseinheit und Filter erreicht werden. Die Besonderheit besteht darin, dass bei Aufschaltung eines Gegenpoles dieser so geregelt oder so mit der Spannungserzeugung des Erzeugers des elektrostatischen Feldes gekoppelt und geregelt werden kann, dass die elektrische Oberflächenspannung des synthetischen Filtermaterials nicht mehr als +/- 30% gegenüber dem Ausgangszustand schwankt und damit die Isolationswirkung durch abgeschiedene Feinstäube auf dem Filtermaterial ausgeglichen wird. Der Kanal vom Erzeuger des elektrostatischen Feldes, vorzugsweise eines Ionisators, bis zum mechanischen Filter, wird mindestens mit einem elektrisch isolierenden und nicht oder nur wenig leitenden Material oder einem Material, welches eine gleichgerichtete Ladung wie die elektrostatische Aufladungseinheit aufweist, ausgekleidet oder besteht in Gänze aus derartigem Material, so dass kein Kondensatoreffekt am luftführenden Kanal auftritt. Die gesamte Konstruktion kann als eigenständige Baugruppe in einen vorhandenen Kanal eingefügt oder es kann ein vorhandener Kanal dahingehend modifiziert werden.According to the invention the object is achieved by the features specified in claim 1. In an air-conducting channel, in which a filter made of synthetic material for mechanical separation of dust particles is arranged in the air flow direction, a charging unit for electrostatic charging of the room air is arranged so that a voltage difference between the now charged air flow and the filter material, which consists of synthetic, oberflächenleitendem Material exists. The voltage difference can be achieved by separately grounding the filter material or by applying a Gegenpoles to the electrostatic charging unit of the air by generating an electric field between the charging unit and filter. The peculiarity is that when a counter-pole is applied, it can be regulated or coupled with the voltage generation of the generator of the electrostatic field and controlled so that the electrical surface tension of the synthetic filter material does not fluctuate more than +/- 30% relative to the initial state and thus the insulation effect is compensated by separated fine dusts on the filter material. The channel from the electrostatic field generator, preferably an ionizer, to the mechanical filter is lined or made entirely of at least one electrically insulating and little or no conductive material or a material having a rectified charge such as the electrostatic charging unit such material, so that no capacitor effect on the air duct occurs. The entire construction can be used as an independent assembly in an existing one Channel inserted or an existing channel can be modified to this effect.

Bei der erfindungsgemäßen Lösung wird die Abscheideleistung nahezu unabhängig vom bereits abgeschiedenen Filterkuchen beibehalten. Als Material für den Luftfilter kann z.B. Polypropylen, Glasfaservlies oder Polyestervlies verwendet werden.In the solution according to the invention, the separation efficiency is maintained almost independently of the already deposited filter cake. As the material for the air filter, e.g. Polypropylene, glass fiber fleece or polyester fleece can be used.

Vorteil der Erfindung ist, dass durch die elektrisch neutrale oder in ihrer Ladung gleichgerichtete Kanalwand der sonst immer auftretende Kondensatoreffekt nicht oder nur deutlich reduziert, vorhanden ist und sich weniger Staubpartikel, insbesondere Feinstäube durch Elektrostatik darauf ablagern. Ein weiterer Vorteil der erfindungsgemäßen Lösung ist, dass sich die Feinstäube durch Elektrostatik auf dem oberflächenleitenden Kunststoffmaterial des Filters verstärkt abscheiden und dieser Abscheideeffekt durch den Feldaufbau zwischen elektrostatischer Aufladungseinheit, welche vorzugsweise ein Ionenerzeuger ist, und Filter aufgrund der Isolation des Filters gegenüber der Kanalwandung und der zusätzlichen Erdung des Filters oder des Anschlusses eines Gegenpoles zum Ionenerzeuger an den Filter um mindestens den Faktor 2 erhöht wird. Von Vorteil ist zudem, dass der Kanal sich elektrisch nicht auflädt und damit eine erhöhte Sicherheit für den Nutzer gegeben ist sowie eine Filterüberwachung durch Auswertung der elektrischen Ableitung stattfinden kann.Advantage of the invention is that by the electrically neutral or rectified in their charge channel wall of the otherwise always occurring capacitor effect is not or only significantly reduced, is present and deposit less dust particles, especially fine dust by electrostatics on it. Another advantage of the solution according to the invention is that the fine dust deposited by electrostatics on the surface-conductive plastic material of the filter and this deposition effect by the field structure between electrostatic charging unit, which is preferably an ion generator, and filter due to the isolation of the filter against the channel wall and the additional grounding of the filter or the connection of a counterpole to the ion generator to the filter by at least a factor of 2 is increased. Another advantage is that the channel is not electrically charged and thus increased security for the user is given and a filter monitoring can take place by evaluating the electrical discharge.

Die Erfindung wird anhand der drei nachstehend beschriebenen Ausführungsbeispiele näher erläutert.The invention will be explained in more detail with reference to the three embodiments described below.

Fig. 1 zeigt den Einbau in einen Lüftungskanal mit Isolation und entgegengesetzter Aufladung des Filtermaterials zum Ionenerzeuger. Fig. 1 shows the installation in a ventilation duct with insulation and opposite charging of the filter material to the ion generator.

In einem Lüftungskanal 1 befindet sich ein an der Wandung anliegendes eingesetztes, elektrisch nicht leitendes und den Lüftungskanal 1 über eine Strecke von der Ionisationseinheit 3 bis nach dem wechselbaren Luftfilter 2 gegen den Ionisator 3 isolierendes Material 6. Der Ionisationseinheit 3 ist ein Leistungsteil (Netzteil, Spannungsquelle) 4 vorgeschaltet, wobei nur der negativ geladene Ausgang 8 an die Ionisationseinheit angeschlossen ist. Der positive Ausgang 7 ist direkt auf den Luftfilter 2 aufgelegt, so dass sich zwischen der Ionisationseinheit 3 und dem Luftfilter aufgrund der Spannungsdifferenz ein elektrisches Feld aufbaut und das Luftfiltermaterial durch seine entgegengesetzte Ladung zum Ionisator und den in der Zuluft dadurch elektrisch aufgeladenen Teilchen und Feinstäuben diese anzieht. Dem Leistungsteil 4 ist eine Steuer- oder Regeleinheit 5 nachgeschaltet, die einerseits die Spannungsdifferenz zwischen der Ionisationseinheit 3 und dem Luftfilter 2 messen kann und bei Reduzierung dieser durch Feinstaubablagerungen durch Erhöhung der Leistung des Leistungsteiles 4 des lonisators diese Spannungsdifferenz nachstellen kann. Der wechselbare Luftfilter 2 ist durch den Einbau in das isolierende Material 6 gegen Entladung zum Lüftungskanal 1 geschützt.In a ventilation duct 1 is an applied to the wall used, electrically non-conductive and the ventilation duct 1 over a distance from the ionization unit 3 to the removable air filter 2 against the ionizer 3 insulating material 6. The ionization unit 3 is a power unit (power supply, Voltage source) 4 upstream, with only the negatively charged output 8 is connected to the ionization unit. The positive output 7 is placed directly on the air filter 2, so that builds up an electric field between the ionization unit 3 and the air filter due to the voltage difference and the air filter material by its opposite charge to the ionizer and thereby electrically charged in the supply air particles and particulate matter attracts. The power unit 4 is followed by a control or regulating unit 5, which on the one hand can measure the voltage difference between the ionization unit 3 and the air filter 2 and can reduce this voltage difference by reducing the power of the power unit 4 of the ionizer by reducing this by fine dust deposits. The replaceable air filter 2 is protected by the installation in the insulating material 6 against discharge to the ventilation duct 1.

Fig. 2 zeigt den Einbau in einen Lüftungskanal mit einfacher Isolation und Erdung des Filtermaterials. Fig. 2 shows the installation in a ventilation duct with simple insulation and earthing of the filter material.

In einem Lüftungskanal 1 befindet sich ein an der Wandung anliegendes eingesetztes, elektrisch nicht leitendes und den Lüftungskanal 1 über eine Strecke von der Ionisationseinheit 3 bis nach dem wechselbaren Luftfilter 2 gegen den lonisator 3 isolierendes Material 6. Der Ionisationseinheit 3 ist ein Leistungsteil (Netzteil, Spannungsquelle) 4 vorgeschaltet, wobei nur der negativ geladene Ausgang 8 an die Ionisationseinheit angeschlossen ist. Der wechselbare Luftfilter 2 ist durch den Einbau in das isolierende Material 6 gegen Entladung zum Lüftungskanal 1 geschützt und entlädt sich lediglich über die zum Lüftungskanal 1 isolierte Erdung 9.In a ventilation duct 1 is an applied to the wall used, electrically non-conductive and the ventilation duct 1 over a distance from the ionization unit 3 to the removable air filter 2 against the ionizer 3 insulating material 6. The ionization unit 3 is a power unit (power supply, Voltage source) 4 upstream, with only the negatively charged output 8 is connected to the ionization unit. The replaceable air filter 2 is protected by the installation in the insulating material 6 against discharge to the ventilation duct 1 and discharges only via the grounding to the ventilation duct 1 9th

Fig. 3 zeigt den Einbau in ein Lüftungsgerät zur Wohnraumlüftung mit Isolation und Erdung des Filtermaterials. Fig. 3 shows the installation in a ventilation device for home ventilation with insulation and grounding of the filter material.

Dabei wird in ein Gebäude Außenluft 10 über einen Lüftungskanal 1 durch ein Lüftungsgerät mit einem Kreuzstromwärmetauscher 14 angesaugt und dem Raum als aufbereitete Zuluft 11 über einen Hohlraumfußboden 15 oder Luftkanal zugeführt. Der erforderliche Luftfilter 2 aus synthetischem Material ist als kompakte Filter-Ioneneinheit 19, bestehend aus dem eigentlichen Luftfilter 2, einer elektrischen Isolation 6, einer Luftfiltererdung 9, einer Ionisationseinheit 3, und einer Leistungseinheit 4 mit negativem Stromausgang 8 ausgeführt und im Kanal 1 verankert. Der Luftfilter 2 selbst ist wechselbar ausgelegt. Diese kompakte Filter-Ioneneinheit 19 lädt Feinstaubpartikel elektrostatisch so auf, dass diese im Filter durch elektrostatische Abscheidung auf dem Filtergewebe sicher gebunden werden. Die Abluft 12 des Raumes wird über die Lüftungsanlage und den Kreuzstromwärmetauscher 14 als Abluft nach außen geführt. Die Filter-Ioneneinheit 19 sichert dabei durch ihre erhöhte Abscheideleistung ab, dass ein Filtermaterial mit größerer Maschenweite verwendet werden kann und damit die Leistungsaufnahme des Ventilators 20 geringer ausfällt, womit Energie bei gleicher oder erhöhter Luftqualität der Zuluft 11 eingespart werden kann.In this case, outside air 10 is sucked through a ventilation duct 1 through a ventilation unit with a cross-flow heat exchanger 14 into a building and fed to the room as conditioned supply air 11 via a cavity floor 15 or air duct. The required air filter 2 of synthetic material is designed as a compact filter ion unit 19, consisting of the actual air filter 2, an electrical insulation 6, an air filter earthing 9, an ionization unit 3, and a power unit 4 with a negative current output 8 and anchored in the channel 1. The air filter 2 itself is designed to be changeable. This compact filter ion unit 19 charges fine dust particles electrostatically so that they are securely bound in the filter by electrostatic deposition on the filter fabric. The exhaust air 12 of the room is guided via the ventilation system and the cross-flow heat exchanger 14 as exhaust air to the outside. The filter ion unit 19 secures by their increased separation efficiency that a filter material with a larger mesh size can be used and thus the power consumption of the fan 20 fails lower, which energy can be saved at the same or increased air quality of the supply air 11.

Fig. 4 zeigt den Einbau in ein Lüftungsgerät zur Wohnraumlüftung mit Isolation und Erdung des Filtermaterials zur Entlastung eines erdverlegten Zuluftkanals. Fig. 4 shows the installation in a ventilation unit for domestic ventilation with insulation and grounding of the filter material to relieve a buried supply air duct.

Dabei wird in ein Gebäude Außenluft 10 über einen zunächst erdverlegten und damit schwer zugängigen Lüftungskanal 16 durch ein Lüftungsgerät mit einem Kreuzstromwärmetauscher 14 angesaugt und dem Raum als aufbereitete Zuluft 11 über einen Hohlraumfußboden 15 oder Luftkanal zugeführt. Der erforderliche Luftfilter 2 aus synthetischem Material ist als kompakte Filter-Ioneneinheit 19, bestehend aus dem eigentlichen Luftfilter 2, einer elektrischen Isolation 6, einer Luftfiltererdung 9, einer Ionisationseinheit 3, und einer Leistungseinheit 4 mit negativem Stromausgang 8 ausgeführt und im Kanal 1 verankert. Der Luftfilter 2 selbst ist wechselbar ausgelegt. Diese kompakte Filter-Ioneneinheit 19 ist im Ansaugdom 17 eingangs des Kanals 16 angebracht. Die Filter-Ioneneinheit 19 lädt Feinstaubpartikel elektrostatisch so auf, dass diese im Filter durch elektrostatische Abscheidung auf dem Filtergewebe sicher gebunden werden. Die notwendige Stromversorgung der Ioneneinheit erfolgt autark, in diesem Fall über eine Photovoltaikanlage mit Energiespeicher, ähnlich dem Funktionsprinzip von Solarleuchten oder auch durch herkömmliche Stromversorgung.In this case, outside air 10 is sucked into a building via a first buried and therefore difficult to access ventilation duct 16 through a ventilation unit with a cross-flow heat exchanger 14 and the space supplied as treated supply air 11 via a cavity floor 15 or air duct. The required air filter 2 of synthetic material is designed as a compact filter ion unit 19, consisting of the actual air filter 2, an electrical insulation 6, an air filter earthing 9, an ionization unit 3, and a power unit 4 with a negative current output 8 and anchored in the channel 1. The air filter 2 itself is designed to be changeable. This compact filter ion unit 19 is mounted in the intake dome 17 at the entrance of the duct 16. The filter ion unit 19 charges fine dust particles electrostatically so that they are securely bound in the filter by electrostatic deposition on the filter fabric. The necessary power supply of the ion unit is self-sufficient, in this case via a photovoltaic system with energy storage, similar to the principle of operation of solar lights or by conventional power supply.

Durch die Einbindung eingangs des erdverlegten Zuluftkanals 16 wird gesichert, dass keine oder nur eine äußerst geringe Feinstaubbelastung sich im Kanal sedimentieren kann und damit Nährgrundlage für mögliche Mikroorganismen bildet. Zudem wird das Reinigungsintervall dieses Kanalstückes verlängert, was eine hohe Einsparung mit sich bringt. Die Abluft 12 des Raumes wird wiederum über die Lüftungsanlage und den Kreuzstromwärmetauscher 14 nach außen verbracht. Die Filter-Ioneneinheit 19 sichert dabei durch ihre erhöhte Abscheideleistung ab, so dass ein Filtermaterial mit größerer Maschenweite verwendet werden kann und damit die Leistungsaufnahme des Ventilators 20 geringer ausfällt, womit Energie bei gleicher oder erhöhter Luftqualität der Zuluft 11 eingespart werden kann.By integrating the entrance of the buried supply air duct 16 ensures that no or only a very low particulate matter pollution can sediment in the channel and thus forms a nutrient basis for possible microorganisms. In addition, the cleaning interval of this channel piece is extended, which brings a high saving with it. The exhaust air 12 of the room is again spent on the ventilation system and the cross-flow heat exchanger 14 to the outside. The filter ion unit 19 secures by their increased separation efficiency, so that a filter material with a larger mesh size can be used and thus the power consumption of the fan 20 fails lower, which energy can be saved at the same or increased air quality of the supply air 11.

Fig. 5 zeigt den Einbau als Kompakteinheit in einen Lüftungskanal mit Isolation zur Kanalrohrwandung, elektrisch gleichgerichteter Aufladung der Innenseite der Kompakteinheit zur elektrischen Aufladungseinheit, vorzugsweise eines lonisators und der Erdung des Filtermaterials. Fig. 5 shows the installation as a compact unit in a ventilation duct with insulation to the sewer pipe wall, electrically rectified charging the inside of the compact unit to the electric charging unit, preferably an ionizer and the grounding of the filter material.

In einem Lüftungskanal 1 befindet sich ein an der Wandung anliegendes eingesetztes, elektrisch nicht leitendes und den Lüftungskanal 1 über eine Strecke von der Ionisationseinheit 3 bis nach dem wechselbaren Luftfilter 2 gegen den Ionisator 3 isolierendes Material 6. Die luftführende Innenseite des isolierenden Materials 6 ist eine elektrisch leitende Schicht 22 und weist die gleiche Ladung oder Spannung auf, wie die elektrische Aufladungseinheit, welche als Ionisationseinheit 3 ausgeführt ist. Der Ionisationseinheit 3 ist ein Leistungsteil 4 vorgeschaltet, wobei nur der negativ geladene Ausgang 8 an die Ionisationseinheit und die elektrisch leitende Schicht 22 angeschlossen ist. Die elektrisch leitende Schicht 22 auf dem isolierenden Material 6 hat keinen mechanischen oder elektrischen Kontakt mit dem wechselbaren Luftfilter 2. Der wechselbare Luftfilter 2 ist durch den Einbau in das isolierende Material 6 gegen Entladung zum Lüftungskanal 1 geschützt und entlädt sich lediglich über die zum Lüftungskanal 1 isolierte Erdung.In a ventilation duct 1 is an applied to the wall used, electrically non-conductive and the ventilation duct 1 over a distance from the ionization unit 3 to the removable air filter 2 against the ionizer 3 insulating material 6. The air-conducting inside of the insulating material 6 is a electrically conductive layer 22 and has the same charge or voltage as the electric charging unit, which is designed as ionization unit 3. The ionization unit 3 is preceded by a power section 4, wherein only the negatively charged output 8 is connected to the ionization unit and the electrically conductive layer 22. The electrically conductive layer 22 on the insulating material 6 has no mechanical or electrical contact with the interchangeable air filter 2. The removable air filter 2 is protected by the installation in the insulating material 6 against discharge to the ventilation duct 1 and discharges only to the ventilation duct isolated grounding.

Claims (14)

  1. A separator unit for air ducts (1) comprising a filter/ionizer unit (19) with an air filter (2) whose separating medium consists of synthetic material, as well as an upstream unit (3) for the electrostatic charging of passing air, characterized in that the synthetic material of the air filter (2) is electrostatically chargeable and has surface conductivity and that the material is either connected to a power unit supplying the electrostatic charging unit (3) in such a manner as to form a counter pole to the latter or is installed such that a voltage difference is created between the charged air and the filter (2), characterized in that a duct piece is electrically insulated from the charging unit (3) to the filter (2) such that an electric charging of the air duct by the charging unit (3) is not possible or is only possible to a very small extent, wherein the term small is to denote a voltage difference of -70 % relative to the voltage of the charging unit.
  2. The separator unit according to claim 1, characterized in that the air filter (2) is grounded in order to create the voltage difference.
  3. The separator unit according to claim 1 or 2, characterized in that the surface of an insulating layer (22) insulating the duct piece is adapted to be electrically conductive on its air-ducting side and is switched with the same polarity as the electrical charging unit.
  4. The separator unit according to claim 3, characterized in that the electrically conductive surface of the insulating layer (22) is supplied by the same power unit (4) or charged with the same voltage as the charging unit (3).
  5. The separator unit according to one of claims 1 to 4, characterized in that the charging unit (3) is formed by ionizers in order to create negative or positive ions.
  6. The separator unit according to one of claims 1 to 5, characterized in that a control unit (5) is provided for controlling the voltage applied to the filter material, wherein the control serves to tap a disturbance value which allows to draw a conclusion about the size of the deposit on the filter material and thus about the degree of contamination.
  7. The separator unit according to claim 6, characterized in that the voltage difference between the charging unit (3) and the air filter (2) can be controlled to a nearly constant value, wherein the term nearly constant denotes a deviation of +/- 30 %, and in that the electric resistance of an insulating layer of dirt formed on the air filter (2) by deposited fine particles can be overcome by corresponding readjustment of the voltage applied to the pole acting as a counter pole to the charging unit (3).
  8. The separator unit according to one of claims 1 to 7, characterized in that the power supply of the filter ionizer unit (19) is formed by a power supply unit.
  9. The separator unit according to one of claims 1 to 7 characterized in that the power supply of the filter ionizer unit (19) is formed by a photovoltaic system in accordance with the switching and storage principle of self-supporting solar lights.
  10. The separator unit according to one of claims 1 to 9, characterized in that the filter ionizer unit (19) is adapted for installation in ventilation systems of residential buildings as well as in recirculating air devices.
  11. The separator unit according to one of claims 1 to 10, characterized in that the filter ionizer unit is adapted for installation in floor ventilation systems.
  12. The separator unit according to one for claims 1 to 11, characterized in that the separator unit is designed as a mountable separate assembly for ventilation systems.
  13. The separator unit according to one of claims 1 to 11, characterized in that the separator unit is designed as a separate assembly to be installed upstream of buried or non-accessible air ducts.
  14. The separator unit according to claim 13, characterized in that the assembly has a self-contained power supply.
EP14156076.3A 2013-03-06 2014-02-21 Electrically isolated filter unit made of synthetic material and ioniser for electrostatic precipitation of particulates in ventilation ducts Active EP2786769B1 (en)

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DE102021132295A1 (en) 2021-12-08 2023-06-15 RL-Raumlufttechnik und Raumluftqualität Gesellschaft mit beschränkter Haftung Device for filtering an air flow contaminated with particles

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WO2017222457A1 (en) * 2016-06-22 2017-12-28 Blueair Ab Air treatment device

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JPS5910046B2 (en) 1977-03-28 1984-03-06 新田ベルト株式会社 Charge retention structure of electrified air filter media
DE10007523C2 (en) 2000-02-18 2002-03-14 Lk Luftqualitaet Ag Reussbuehl Process for air treatment with ions and device for carrying out the process
EP1440695B1 (en) 2003-01-21 2009-07-01 Helmut Dipl.-Ing. Siegmund Device for activating oxygen from air for the destruction of VOCs and germs in closed rooms and for maintaining oxygen and ozone concentrations equal to those occuring in nature
FR2864143B1 (en) * 2003-12-19 2006-04-07 Renault Sas ELECTROSTATIC FILTRATION SYSTEM FOR EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE
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Publication number Priority date Publication date Assignee Title
DE102021132295A1 (en) 2021-12-08 2023-06-15 RL-Raumlufttechnik und Raumluftqualität Gesellschaft mit beschränkter Haftung Device for filtering an air flow contaminated with particles
EP4205857A2 (en) 2021-12-08 2023-07-05 RL Raumlufttechnik + Raumluftqualität GmbH Device for filtering an air stream contaminated with particles
EP4205857A3 (en) * 2021-12-08 2023-09-13 RL Raumlufttechnik + Raumluftqualität GmbH Device for filtering an air stream contaminated with particles

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