EP2696999A1 - Cleaning device - Google Patents

Cleaning device

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Publication number
EP2696999A1
EP2696999A1 EP12715656.0A EP12715656A EP2696999A1 EP 2696999 A1 EP2696999 A1 EP 2696999A1 EP 12715656 A EP12715656 A EP 12715656A EP 2696999 A1 EP2696999 A1 EP 2696999A1
Authority
EP
European Patent Office
Prior art keywords
cleaning device
ionization
contaminating particles
flow channel
sensor
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.)
Granted
Application number
EP12715656.0A
Other languages
German (de)
French (fr)
Other versions
EP2696999B1 (en
Inventor
Jochen Lorenscheit
Ingo Schulz
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.)
SKF AB
Original Assignee
SKF AB
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Filing date
Publication date
Application filed by SKF AB filed Critical SKF AB
Publication of EP2696999A1 publication Critical patent/EP2696999A1/en
Application granted granted Critical
Publication of EP2696999B1 publication Critical patent/EP2696999B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B6/00—Cleaning by electrostatic means
    • 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
    • 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
    • B03C3/66—Applications of electricity supply techniques
    • B03C3/68—Control systems therefor
    • 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 with two or more serrated ends or sides
    • 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
    • B03C2201/24—Details of magnetic or electrostatic separation for measuring or calculating of parameters, e.g. efficiency

Definitions

  • Embodiments of the present invention are concerned with a cleaning device for removing contaminating particles from a medium, in particular using an electric field.
  • a high voltage DC plasma may be used for cleaning when an electrostatic or electrodynamic field is generated between 2 electrodes between which the gas or medium to be cleaned flows.
  • contaminants in the medium or impurity-forming particles or molecules in the field may be ionized.
  • This so-called field ionization leaves a positively charged body of the particle or contaminant, which is directed under the influence of the ionization-inducing field and removed along the field lines from the region of ionization, or along the field lines from the site of ionization to one Cathode drifts.
  • the voltage between the electrodes and thus the resulting field strength is suitably chosen, so that approximately all particles or all contaminating particles are ionized, one can speak of a plasma in which all contaminating particles are ionized.
  • the cleaning with a plasma generally requires to maintain high fields or the high voltages required to generate a high field permanently, which is extremely energy-consuming.
  • Some embodiments of the invention use, in addition to an ionization device, which can generate an electric field by means of two electrodes located opposite on different sides of a flow channel, in addition a Veranalismssensor that detects the degree of contamination of the medium to be cleaned.
  • a control device is also coupled to the contamination sensor, which can change an operating mode of the ionization device depending on a determined characteristic of the contaminating particles, for example the concentration or the particle size of the impurities.
  • the field strength of the Ionisierangs leverage be dynamically adapted to the circumstances or to time-varying requirements.
  • the field strength can be reduced, or a voltage at the electrodes of the ionization device can be reduced. In some embodiments, this reduction may optionally be done until a power supply is turned off, ie, the controller may operate in the form of a binary controller and selectively turn the power on or off.
  • This procedure can save a considerable amount of energy to maintain the electric field, while ensuring a continuously high cleaning effect.
  • Voltages with which the electrodes of some exemplary embodiments are subjected to ionization devices in order to achieve a cleaning effect can lie between 1 kV and 100 kV, preferably between 3 kV and 20 kV.
  • Some embodiments of the invention comprise a cascade of ionization devices arranged one behind the other in the flow direction of the medium to be cleaned.
  • another embodiment may include a second ionization device, which in turn has two opposing electrodes.
  • only one downstream element of the cascade, that is to say, for example, the second ionization device, is influenced or switched on and off by means of the control device.
  • the energy consumption can be reduced in principle to half, with a reliable cleaning effect is given at any time.
  • a Veran invasionssensor is arranged both before and after the first Ionisierangs adopted a cascade or a single Ionisierangs adopted.
  • both the cleaning performance of Ionization be varied until a complete cleaning is achieved, as well as harmless the maximum energy saving can be achieved if in the medium for a certain period a priori no contaminating particles are included.
  • the concentration of contaminant particles between the first and second ionizer devices is determined to reliably determine whether the downstream second ionizer device can be shut down or operated at reduced power.
  • only the second ionization device located downstream of the first ionization device is influenced by the controller such that, for example, if a predetermined maximum value of tolerable contaminants is not reached, the second ionizer device is turned off.
  • sensors used to detect contaminants in the medium to be cleaned are IR sensors, laser particle sensors (air particle counter) or ultrasonic sensors.
  • IR sensors IR sensors
  • laser particle sensors air particle counter
  • ultrasonic sensors functioning according to other principles sensors can be used.
  • any sensor or device by means of which an impurity in a medium or a substance differing from a medium within the medium can be recognized as an impurity sensor.
  • FIG. 1 shows an embodiment of a cleaning device
  • FIG. 2 shows a further embodiment of a cleaning device with cascaded ionization directions
  • FIG. 3 shows an exemplary embodiment of a method for operating a cleaning device.
  • FIG. 1 shows an exemplary embodiment of a cleaning device for removing contaminating particles 4 from a medium or from a gas or gas mixture.
  • the gas or the contaminated medium flows along a flow channel in a flow direction 6, so that the gas or medium flowing in a flow direction 6 along the flow channel can be removed by means of the cleaning device.
  • This is not to be understood as meaning that in fact a volume flow in the flow direction has to take place in order to be able to clean a medium or to ensure the desired functionality. Rather, the direction of flow 6 indicates that direction with respect to which the contaminating particles can be removed when they enter the cleaning device from the direction of flow 6.
  • the direction of flow 6 indicates that direction in which a cleaning action takes place, so that in the flow direction 6 downstream of the cleaning device, the concentration of the contaminating particles 4 after passing through the cleaning device is lower than before passing through the cleaning device.
  • the cleaning device comprises at least one ionization device 8, which has a pair of electrodes facing each other on different sides of the flow channel.
  • an ionization device 8 which has a pair of electrodes facing each other on different sides of the flow channel.
  • FIG. 1 as one of the possible embodiments of the pair of electrodes, an anode 10 with a plurality of tips and a flat cathode 12 are shown.
  • the specific shape of the electrodes, which the shape of the generated electric field which may be adapted to other geometric conditions and other conditions.
  • the arrangement of cathode and anode can be reversed, ie an application of voltage to the electrodes can be opposite to that in FIG. 1, where an optional high voltage supply 14 is coupled to the electrodes 10 and 12 such that the anode 10 is connected to the electrodes pointed electrodes is formed.
  • the polarity may be the other way around than shown in FIG.
  • only a single electrode can be used for the anode 10 or the number of electrodes or the tips of an electrode can be
  • the cleaning apparatus further includes at least one contaminant sensor 16 configured to determine a characteristic, such as concentration or size of the contaminant particles in the medium.
  • Figure 1 shows an optional second Verancurissensor 18, which is arranged in the flow direction 6 after the Ionisierangs Huawei 8, can be dispensed with alternative AusSteangsbeiard one of the Veranalismssensoren 16 or 18 shown in Figure 1.
  • the contaminant sensor 16 or 18 may determine the concentration and / or the size or other property of the contaminating particles in the medium.
  • the annealing cleaning sensor 16 may be an optical sensor based on the intensity of light emitted from the opposite side of the flow channel or intensity of a light emitted from the annealing sensor 16 itself and reflected from the opposite side to the concentration can close the contaminating particles in the medium.
  • Other possible sensors that can be used as contamination sensor are IR sensors, laser particle sensors (air particle counter) or ultrasonic sensors.
  • the cleaning device furthermore has a control device 20, which is connected both to the ionization device 8 and to the contamination purification sensor 16. is coupled.
  • the control device 20 is designed to vary an operating mode of the ionization device 8 as a function of the characteristic of the contaminating particles 4 determined by the contaminant sensor 16. This can be done, for example, by varying the height of the voltage applied to the electrodes 10 and 12.
  • a simple further possibility of the control is to switch off the concentration of the contaminating particles 4, the ionization device 8 when it falls below a predetermined maximum value or to ensure that the Ionisierangs worn 8 generates no electric field more.
  • the ionization device 20 may also be optionally coupled to the voltage supply 14, for example in an alternative embodiment.
  • the maximum cleaning performance of a cleaning device can be increased if the contaminating particles in the direction of flow can pass through a plurality of ionization devices arranged one behind the other.
  • FIG. 2 shows an exemplary embodiment or a possible arrangement of such a cleaning device with cascaded ionization devices.
  • FIG. 2 shows, as a possible arrangement, three ionizing devices 28a-28c arranged one behind the other in the flow direction 6, as well as contaminating sensors 26a-26d adjacent to the ionizing devices 28a-28c.
  • FIG. 2 shows an optional possibility of designing the cathodes 32a-32c opposite the anodes 30a-30c, which are short-circuited with one another and thus form a common cathode surface.
  • discrete cathodes or alternative embodiments of the cathodes 32a-32c as well as a reverse polarity are also possible here. Only for the sake of representability is omitted in Figure 2 on the representation of an optional power supply.
  • the control device 20 is coupled to both the purge sensors 26a to 26d and to the ionization devices 28a to 28c to be dependent to vary the operating conditions or the control of the ionization devices 28a to 28c from the concentrations or characteristics of the contaminating particles detected by the individual contamination sensors.
  • individual ones of the ionization devices 28a to 28c can either be switched on or off or the supply voltage of individual ionization devices can be selectively or collectively varied, ie increased or decreased.
  • the ionizer 28c may be turned off.
  • any other control algorithms are possible.
  • the contamination sensors 26a to 26d or a sensor before and / or in the effective range of the plasma or the electric field can by detecting, for example, the size and / or the number of the substance to be influenced or the contaminating particles of this plasma generating high voltage DC switched on or off or be varied in height.
  • a cascade control as shown by way of example in Figure 2, also a demand-dependent control is subdivided into individual plasma zones or zones of a non-disappearance electric field feasible.
  • a power consumption in the cleaning by means of a plasma or by means of an ionizing electric field is reduced. Furthermore, a reduction of the ozone emission can be achieved, as well as a reduction of the wear of the electrodes.
  • FIG. 3 shows schematically an embodiment of a method for operating a cleaning device for removing contaminating particles from a medium flowing in a flow direction along a flow channel, wherein the cleaning device is designed to use different Chen sides of the flow channel opposite electrodes to generate an electric field in the flow channel.
  • a characteristic of the contaminating particles in the medium is determined.
  • an operation mode of the ionization device is varied.
  • embodiments of a cleaning device can be used as a seal by unwanted parts or particles from a bearing or a component to be protected surrounding medium, such as air or gas, are removed so that they can not get into the component to be protected.
  • a cleaning device in bearings, in particular plain bearings and bearings can be used to protect the bearing from contamination and premature wear.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)

Abstract

The invention relates to a cleaning device for removing contaminating particles (4) from a medium flowing along a flow channel in a flow direction (6), comprising an ionisation apparatus (8), which is configured to generate an electric field in the flow channel by means of a pair of electrodes (10, 12) lying opposite each other on different sides of the flow channel, and at least one contamination sensor (16), which is configured to determine a characteristic of the contaminating particles in the medium. Coupled to the contamination sensor (16) and the ionisation means (8) is a control means (20), which is configured to vary an operating mode of the ionisation means (8) depending on the characteristic of the contaminating particles (4) determined by the contamination sensor (16).

Description

B e s c h r e i b u n g  Description
Reinigungsvorrichtung cleaning device
Ausführungsbeispiele der vorliegenden Erfindung befassen sich mit einer Reinigung s Vorrichtung zum Entfernen von verunreinigenden Partikeln aus einem Medium, insbesondere unter Verwendung eines elektrischen Feldes. Embodiments of the present invention are concerned with a cleaning device for removing contaminating particles from a medium, in particular using an electric field.
Zur Reinigung von Medien oder Gasen, wie beispielsweise Luft, existieren eine große Anzahl von Verfahren. Abseits von herkömmlichen Methoden, wie beispielsweise der Verwendung eines Filters, können Medien, wie beispielsweise strömende Gase oder dergleichen, auch mittels Plasmen, also mittels vollständig oder großteils ionisierten Gasen oder, allgemein gesprochen, durch Ionisation gereinigt werden. Zusätzlich zu der Möglichkeit, Medien bzw. strömende Gase mittels Hochstromplasmen zu reinigen, also dadurch, dass das zu reinigende Medium einer großen Menge vollständig ionisierten Gases ausgesetzt wird, besteht auch die Möglichkeit, so genannte Hochspannungs- Gleichstrom- Plasmen zu verwenden bzw. zu erzeugen, bei denen eine geringere elektrische Leistung zur Erzeugung des Plasmas erforderlich sein kann. Diese können unter Anderem in Abscheidern, Dichtungen, Filtern, Reinigern, Schabern, Signalübertragern oder weiteren maschinenbaulichen Erzeugnissen eingesetzt werden. For cleaning media or gases, such as air, there are a large number of methods. Apart from conventional methods, such as the use of a filter, media such as flowing gases or the like, by means of plasmas, ie by means of fully or largely ionized gases or, generally speaking, be purified by ionization. In addition to the ability to purify media or flowing gases by means of high-current plasmas, so that the medium to be cleaned is exposed to a large amount of fully ionized gas, it is also possible to use or produce so-called high-voltage DC plasmas in which a lower electrical power may be required to produce the plasma. These can be used, among other things, in separators, seals, filters, cleaners, scrapers, signal transducers or other mechanical engineering products.
Ein Hochspannungs- Gleichstrom- Plasma kann zur Reinigung dann verwendet werden, wenn ein elektrostatisches oder elektrodynamisches Feld zwischen 2 Elektroden erzeugt wird, zwischen denen das zu reinigende Gas bzw. Medium strömt. Bei ausreichend hoher Feldstärke können Verunreinigungen in dem Medium bzw. die Verunreinigungen bildenden Partikel oder Moleküle in dem Feld ionisiert werden. Durch diese so genannte Feldionisation verbleibt ein positiv geladener Rumpf des Partikels bzw. der Verunreinigung, der unter dem Einfluss des die Ionisation hervorrufenden Feldes gerichtet und entlang der Feldlinien aus dem Bereich der Ionisation entfernt wird, bzw. entlang der Feldlinien vom Ort der Ionisation zu einer Kathode driftet. Ist die Spannung zwischen den Elektroden und damit die resultierende Feldstärke passend gewählt, sodass näherungsweise alle Partikel bzw. alle verunreinigenden Partikel ionisiert werden, kann von einem Plasma gesprochen werden, in dem sämtliche verunreinigenden Partikel ionisiert sind. A high voltage DC plasma may be used for cleaning when an electrostatic or electrodynamic field is generated between 2 electrodes between which the gas or medium to be cleaned flows. At a sufficiently high field strength, contaminants in the medium or impurity-forming particles or molecules in the field may be ionized. This so-called field ionization leaves a positively charged body of the particle or contaminant, which is directed under the influence of the ionization-inducing field and removed along the field lines from the region of ionization, or along the field lines from the site of ionization to one Cathode drifts. If the voltage between the electrodes and thus the resulting field strength is suitably chosen, so that approximately all particles or all contaminating particles are ionized, one can speak of a plasma in which all contaminating particles are ionized.
Die Reinigung mit einem Plasma erfordert es allgemein, hohe Felder bzw. die zur Erzeugung eines hohen Feldes erforderlichen hohen Spannungen permanent aufrecht zu erhalten, was äußerst Energieaufwändig ist. The cleaning with a plasma generally requires to maintain high fields or the high voltages required to generate a high field permanently, which is extremely energy-consuming.
Es besteht somit die Notwendigkeit, eine Reinigungsvorrichtung zur Verfügung zu stellen, die effizienter betrieben werden kann. There is thus a need to provide a cleaning device that can be operated more efficiently.
Einige Ausführungsbeispiele der Erfindung verwenden neben einer Ionisierungseinrichtung, die mittels zweier sich auf unterschiedlichen Seiten eines Strömungskanals gegenüberliegenden Elektroden ein elektrisches Feld erzeugen kann, zusätzlich einen Veranreinigungssensor, der den Grad der Verunreinigung des zu reinigenden Mediums feststellt. Mit dem Verunreinigungssensor ist ferner eine Kontrolleinrichtung gekoppelt, die abhängig von einer ermittelten Charakteristik der verunreinigenden Partikel, beispielsweise der Konzentration oder der Partikelgröße der Verunreinigungen, einen Betriebsmodus der Ionisierangseinrichtung verändern kann. Mit anderen Worten kann bei einigen Ausführungsbeispielen der Erfindung die Feldstärke der Ionisierangseinrichtung dynamisch an die Gegebenheiten bzw. an zeitlich schwankende Anforderungen angepasst werden. Wird beispielsweise von dem Veranreinigungssensor detektiert, dass aktuell keine verunreinigenden Partikel in einem Strom von Luft bzw. einem anderen Medium enthalten sind, kann die Feldstärke reduziert werden, bzw. es kann eine Spannung an den Elektroden der Ionisierangseinrichtung reduziert werden. Bei einigen Ausführungsbeispielen kann diese Reduzierung optional bis zum Abschalten einer Spannungsversorgung vorgenommen werden, d.h. die Kontrolleinrichtung kann in Form einer binären Steuerung arbeiten und die Spannungsversorgung wahlweise ein- oder ausschalten. Some embodiments of the invention use, in addition to an ionization device, which can generate an electric field by means of two electrodes located opposite on different sides of a flow channel, in addition a Veranreinigungssensor that detects the degree of contamination of the medium to be cleaned. A control device is also coupled to the contamination sensor, which can change an operating mode of the ionization device depending on a determined characteristic of the contaminating particles, for example the concentration or the particle size of the impurities. In other words, in some embodiments of the invention, the field strength of the Ionisierangseinrichtung be dynamically adapted to the circumstances or to time-varying requirements. If, for example, the contaminant sensor detects that no contaminating particles are currently contained in a stream of air or another medium, the field strength can be reduced, or a voltage at the electrodes of the ionization device can be reduced. In some embodiments, this reduction may optionally be done until a power supply is turned off, ie, the controller may operate in the form of a binary controller and selectively turn the power on or off.
Dieses Vorgehen kann eine erhebliche Menge Energie zur Aufrechterhaltung des elektrischen Feldes sparen, wobei gleichzeitig eine kontinuierlich hohe Reinigungswirkung sichergestellt ist. This procedure can save a considerable amount of energy to maintain the electric field, while ensuring a continuously high cleaning effect.
Spannungen, mit denen die Elektroden einiger Ausführungsbeispiele von Ionisie- rangseinrichtungen beaufschlagt werden, um eine Reinigungswirkung zu erzielen, können zwischen lkV und lOOkV, bevorzugt zwischen 3kV und 20kV, liegen. Voltages with which the electrodes of some exemplary embodiments are subjected to ionization devices in order to achieve a cleaning effect can lie between 1 kV and 100 kV, preferably between 3 kV and 20 kV.
Einige Ausführungsbeispiele der Erfindung weisen eine Kaskade von Ionisierungseinrichtungen auf, die in der Strömungsrichtung des zu reinigenden Mediums hintereinander angeordnet sind. So kann beispielsweise ein weiteres Ausführungsbeispiel eine zweite Ionisierangseinrichtung aufweisen, welche wiederum über zwei einander gegenüberliegende Elektroden verfügt. Bei einigen Ausführungsbeispielen der Erfindung wird lediglich ein nachgelagertes Element der Kaskade, also beispielsweise die zweite Ionisierangseinrichtung, mittels der Kontrolleinrichtung be- einflusst bzw. an- und ausgeschaltet. So kann der Energieverbrauch prinzipiell auf bis zur Hälfte reduziert werden, wobei eine zuverlässige Reinigungswirkung zu jedem Zeitpunkt gegeben ist. Some embodiments of the invention comprise a cascade of ionization devices arranged one behind the other in the flow direction of the medium to be cleaned. For example, another embodiment may include a second ionization device, which in turn has two opposing electrodes. In some embodiments of the invention, only one downstream element of the cascade, that is to say, for example, the second ionization device, is influenced or switched on and off by means of the control device. Thus, the energy consumption can be reduced in principle to half, with a reliable cleaning effect is given at any time.
Bei weiteren Ausführungsbeispielen ist sowohl vor als auch nach der ersten Ionisierangseinrichtung einer Kaskade bzw. einer einzelnen Ionisierangseinrichtung ein Veranreinigungssensor angeordnet. Somit kann sowohl die Reinigungsleistung der Ionisierungseinrichtung variiert werden, bis eine vollständige Reinigung erzielt ist, als auch unschädlich die maximale Energieeinsparung erzielt werden, wenn in dem Medium für einen gewissen Zeitraum a priori keine verunreinigenden Partikel enthalten sind. In further embodiments, a Veranreinigungssensor is arranged both before and after the first Ionisierangseinrichtung a cascade or a single Ionisierangseinrichtung. Thus, both the cleaning performance of Ionization be varied until a complete cleaning is achieved, as well as harmless the maximum energy saving can be achieved if in the medium for a certain period a priori no contaminating particles are included.
Bei einigen Ausführungsbeispielen wird die Konzentration der verunreinigenden Partikel zwischen der ersten und der zweiten Ionisierangseinrichtung bestimmt, um zuverlässig entscheiden zu können, ob die stromabwärts gelegene zweite Ionisierangseinrichtung abgeschaltet oder mit reduzierter Leistung betrieben werden kann. In some embodiments, the concentration of contaminant particles between the first and second ionizer devices is determined to reliably determine whether the downstream second ionizer device can be shut down or operated at reduced power.
Bei einigen Ausführungsbeispielen wird nur die zweite Ionisierangseinrichtung, die stromabwärts von der ersten Ionisierangseinrichtung gelegen ist, mittels der Kontrolleinrichtung beeinflusst, so dass beispielsweise bei Unterschreiten eines vorbestimmten Maximalwerts von tolerierbaren Verunreinigungen die zweite Ionisierangseinrichtung abgeschaltet wird. In some embodiments, only the second ionization device located downstream of the first ionization device is influenced by the controller such that, for example, if a predetermined maximum value of tolerable contaminants is not reached, the second ionizer device is turned off.
Bei einigen Ausführungsbeispielen der vorliegenden Erfindung werden als Sensoren zu der Detektion von Verunreinigungen in dem zu reinigenden Medium IR- Sensoren, Laserpartikelsensoren (Luftpartikelzähler) oder Ultraschallsensoren verwendet. Selbstverständlich können bei weiteren Ausführungsbeispielen auch nach anderen Prinzipien funktionierende Sensoren verwendet werden. Als Veranreini- gungssensor soll insoweit jeder Sensor oder jede Vorrichtung verstanden werden, mittels derer eine Verunreinigung in einem Medium bzw. ein von einem Medium abweichender Stoff innerhalb des Mediums erkannt werden kann. In some embodiments of the present invention, sensors used to detect contaminants in the medium to be cleaned are IR sensors, laser particle sensors (air particle counter) or ultrasonic sensors. Of course, in other embodiments, functioning according to other principles sensors can be used. In this respect, any sensor or device by means of which an impurity in a medium or a substance differing from a medium within the medium can be recognized as an impurity sensor.
Bevorzugte Ausführangsbeispiele der vorliegenden Erfindung werden nachfolgen, bezugnehmend auf die beigefügten Figuren, näher erläutert. Es zeigen: Preferred Ausführangsbeispiele of the present invention will be described below, with reference to the accompanying figures, explained in more detail. Show it:
Figur 1 ein Ausführangsbeispiel einer Reinigungsvorrichtung; Figur 2 ein weiteres Ausführungsbeispiel einer Reinigungsvorrichtung mit kaska- dierten Ionisierungseimichtungen; und FIG. 1 shows an embodiment of a cleaning device; FIG. 2 shows a further embodiment of a cleaning device with cascaded ionization directions; and
Figur 3 ein Ausführungsbeispiel eines Verfahrens zum Betreiben einer Reinigungsvorrichtung. FIG. 3 shows an exemplary embodiment of a method for operating a cleaning device.
Figur 1 zeigt ein Ausführungsbeispiel einer Reinigungsvorrichtung zum Entfernen von verunreinigenden Partikeln 4 aus einem Medium oder aus einem Gas bzw. Gasgemisch. Das Gas bzw. das verunreinigte Medium strömt entlang eines Strömungskanals in einer Flussrichtung 6, so dass mittels der Reinigungsvorrichtung das in einer Flussrichtung 6 entlang des Strömungskanals strömende Gas bzw. Medium entfernt werden kann. Dies ist nicht allein so zu verstehen, dass tatsächlich ein Volumenstrom in der Flussrichtung erfolgen muss, um ein Medium reinigen zu können bzw. um die gewünschte Funktionalität zu gewährleisten. Die Flussrichtung 6 gibt vielmehr diejenige Richtung an, bezüglich derer die verunreinigenden Partikel entfernt werden können, wenn sie aus der Flussrichtung 6 in die Reinigungsvorrichtung geraten. Dies muss nicht notwendigerweise durch einen gerichteten Volumenstrom des Mediums in der Flussrichtung 6 der Fall sein, sondern kann beispielsweise auch aus Gründen der Diffusion der Fall sein. Die Flussrichtung 6 gibt also allgemein gesprochen diejenige Richtung vor, in der eine Reinigungswirkung erfolgt, so dass in der Flussrichtung 6 stromabwärts von der Reinigungsvorrichtung die Konzentration der verunreinigenden Partikel 4 nach dem Durchgang durch die Reinigungsvorrichtung geringer ist als vor dem Durchgang durch die Reinigungsvorrichtung. FIG. 1 shows an exemplary embodiment of a cleaning device for removing contaminating particles 4 from a medium or from a gas or gas mixture. The gas or the contaminated medium flows along a flow channel in a flow direction 6, so that the gas or medium flowing in a flow direction 6 along the flow channel can be removed by means of the cleaning device. This is not to be understood as meaning that in fact a volume flow in the flow direction has to take place in order to be able to clean a medium or to ensure the desired functionality. Rather, the direction of flow 6 indicates that direction with respect to which the contaminating particles can be removed when they enter the cleaning device from the direction of flow 6. This need not necessarily be the case through a directed volumetric flow of the medium in the flow direction 6, but may also be the case, for example, for reasons of diffusion. Thus, in general terms, the direction of flow 6 indicates that direction in which a cleaning action takes place, so that in the flow direction 6 downstream of the cleaning device, the concentration of the contaminating particles 4 after passing through the cleaning device is lower than before passing through the cleaning device.
Die Reinigungsvorrichtung umfasst zumindest eine Ionisierangseinrichtung 8, welche ein Paar von Elektroden aufweist, die sich auf unterschiedlichen Seiten des Strömungskanals gegenüberliegen. In Figur 1 ist als eine der möglichen Ausführungsformen des Elektrodenpaars eine Anode 10 mit einer Mehrzahl von Spitzen sowie eine flächige Kathode 12 gezeigt. Es versteht sich von selbst, dass bei weiteren Ausführungsbeispielen die spezifische Form der Elektroden, welche die Form des erzeugten elektrischen Feldes beeinflussen kann, den möglicherweise anderen geometrischen Gegebenheiten und sonstigen Rahmenbedingungen angepasst sein kann. Insbesondere kann beispielsweise die Anordnung aus Kathode und Anode vertauscht werden, d.h. eine Beaufschlagung der Elektroden mit einer Spannung kann entgegengesetzt sein als in Figur 1, wo exemplarisch eine optionale Hochspannungsversorgung 14 mit den Elektroden 10 und 12 derart gekoppelt ist, dass die Anode 10 von den spitzen Elektroden gebildet wird. Mit anderen Worten kann die Polarität auch anders herum sein als in Figur 1 dargestellt. Zusätzlich kann auch lediglich eine einzelne Elektrode für die Anode 10 verwendet werden bzw. die Anzahl der Elektroden oder der Spitzen einer Elektrode kann beliebig gewählt werden. The cleaning device comprises at least one ionization device 8, which has a pair of electrodes facing each other on different sides of the flow channel. In FIG. 1, as one of the possible embodiments of the pair of electrodes, an anode 10 with a plurality of tips and a flat cathode 12 are shown. It goes without saying that in further embodiments, the specific shape of the electrodes, which the shape of the generated electric field, which may be adapted to other geometric conditions and other conditions. In particular, for example, the arrangement of cathode and anode can be reversed, ie an application of voltage to the electrodes can be opposite to that in FIG. 1, where an optional high voltage supply 14 is coupled to the electrodes 10 and 12 such that the anode 10 is connected to the electrodes pointed electrodes is formed. In other words, the polarity may be the other way around than shown in FIG. In addition, only a single electrode can be used for the anode 10 or the number of electrodes or the tips of an electrode can be chosen arbitrarily.
Die Reinigung s Vorrichtung enthält ferner zumindest einen Veranreinigungssensor 16, der ausgebildet ist, um eine Charakteristik, beispielsweise eine Konzentration oder eine Größe der verunreinigenden Partikel in dem Medium zu bestimmen. The cleaning apparatus further includes at least one contaminant sensor 16 configured to determine a characteristic, such as concentration or size of the contaminant particles in the medium.
Wenngleich Figur 1 einen optionalen zweiten Veranreinigungssensor 18 zeigt, der in der Flussrichtung 6 nach der Ionisierangseinrichtung 8 angeordnet ist, kann bei alternativen Ausführangsbeispielen auf einen der beiden in Figur 1 dargestellten Veranreinigungssensoren 16 oder 18 verzichtet werden. Der Veranreinigungssensor 16 bzw. 18 kann die Konzentration und/oder die Größe bzw. eine andere Eigenschaft der verunreinigenden Partikel in dem Medium bestimmen. Beispielsweise kann der Veranreinigungssensor 16 ein optischer Sensor sein, der aufgrund der Intensität eines von der gegenüberliegenden Seite des Strömungskanals emittierten Lichtes bzw. aufgrund einer Intensität eines von dem Veranreinigungssensor 16 selbst ausgestrahlten und von der gegenüberliegenden Seite reflektierten Lichtes auf die Konzentration bzw. auf die Eigenschaft der verunreinigenden Partikel in dem Medium schließen kann. Andere mögliche Sensoren, die als Veranreinigungssensor verwendet werden können, sind IR-Sensoren, Laserpartikelsensoren (Luftpartikelzähler) oder Ultraschallsensoren. Although Figure 1 shows an optional second Veranreinigungssensor 18, which is arranged in the flow direction 6 after the Ionisierangseinrichtung 8, can be dispensed with alternative Ausführangsbeispielen one of the Veranreinigungssensoren 16 or 18 shown in Figure 1. The contaminant sensor 16 or 18 may determine the concentration and / or the size or other property of the contaminating particles in the medium. For example, the annealing cleaning sensor 16 may be an optical sensor based on the intensity of light emitted from the opposite side of the flow channel or intensity of a light emitted from the annealing sensor 16 itself and reflected from the opposite side to the concentration can close the contaminating particles in the medium. Other possible sensors that can be used as contamination sensor are IR sensors, laser particle sensors (air particle counter) or ultrasonic sensors.
Die Reinigungsvorrichtung weist ferner eine Kontrolleinrichtung 20 auf, die sowohl mit der Ionisierangseinrichtung 8 als auch mit dem Veranreinigungssensor 16 ge- koppelt ist. Die Kontrolleinrichtung 20 ist ausgebildet, um einen Betriebsmodus der Ionisierungseinrichtung 8 abhängig von der von dem Veranreinigungssensor 16 ermittelten Charakteristik der verunreinigenden Partikel 4 zu variieren. Dies kann beispielsweise durch Variation der Höhe der an den Elektroden 10 und 12 anliegenden Spannung erfolgen. Eine einfache weitere Möglichkeit der Regelung ist, bei unterschreiten eines vorbestimmten Maximalwertes die Konzentration der verunreinigenden Partikel 4 die Ionisierangseinrichtung 8 abzuschalten bzw. dafür zu sorgen, dass die Ionisierangseinrichtung 8 kein elektrisches Feld mehr erzeugt. Zu diesem Zweck kann die die Ionisierangseinrichtung 20 beispielsweise in einem alternativen Ausführungsbeispiel auch optional mit der Spannungs Versorgung 14 gekoppelt sein. The cleaning device furthermore has a control device 20, which is connected both to the ionization device 8 and to the contamination purification sensor 16. is coupled. The control device 20 is designed to vary an operating mode of the ionization device 8 as a function of the characteristic of the contaminating particles 4 determined by the contaminant sensor 16. This can be done, for example, by varying the height of the voltage applied to the electrodes 10 and 12. A simple further possibility of the control is to switch off the concentration of the contaminating particles 4, the ionization device 8 when it falls below a predetermined maximum value or to ensure that the Ionisierangseinrichtung 8 generates no electric field more. For this purpose, the ionization device 20 may also be optionally coupled to the voltage supply 14, for example in an alternative embodiment.
Bei weiteren Ausführangsbeispielen, bei denen eine Mehrzahl von kaskadierten Io- nisierangseinrichtungen verwendet wird, kann die maximale Reinigungsleistung einer Reinigung s Vorrichtung erhöht werden, wenn die verunreinigenden Partikel in der Flussrichtung mehrere hintereinander angeordnete Ionisierangseinrichtungen passieren können. In further embodiments, in which a plurality of cascaded ionizing devices is used, the maximum cleaning performance of a cleaning device can be increased if the contaminating particles in the direction of flow can pass through a plurality of ionization devices arranged one behind the other.
Figur 2 zeigt ein Ausführangsbeispiel bzw. einem mögliche Anordnung einer solchen Reinigung s Vorrichtung mit kaskadierten Ionisierangseinrichtungen. Figur 2 zeigt als eine mögliche Anordnung drei in der Flussrichtung 6 hintereinander angeordnet Ionisierangseinrichtungen 28a - 28c, sowie zu den Ionisierangseinrichtungen 28a -28c benachbarte Veranreinigungssensoren 26a-26d. Figur 2 zeigt eine optionale Möglichkeit der Ausgestaltung der den Anoden 30a-30c gegenüberliegenden Kathoden 32a-32c, die miteinander kurzgeschlossen sind und so eine gemeinsame Kathodenfläche bilden. Selbstverständlich sind auch hier diskrete Katoden bzw. alternative Ausgestaltungen der Kathoden 32a -32c sowie eine Umkehrang der Polarität möglich. Lediglich der Darstellbarkeit halber wird in Figur 2 auf die Darstellung einer optionalen Spannungsversorgung verzichtet. FIG. 2 shows an exemplary embodiment or a possible arrangement of such a cleaning device with cascaded ionization devices. FIG. 2 shows, as a possible arrangement, three ionizing devices 28a-28c arranged one behind the other in the flow direction 6, as well as contaminating sensors 26a-26d adjacent to the ionizing devices 28a-28c. FIG. 2 shows an optional possibility of designing the cathodes 32a-32c opposite the anodes 30a-30c, which are short-circuited with one another and thus form a common cathode surface. Of course, discrete cathodes or alternative embodiments of the cathodes 32a-32c as well as a reverse polarity are also possible here. Only for the sake of representability is omitted in Figure 2 on the representation of an optional power supply.
Die Kontrolleinrichtung 20 ist sowohl mit den Veranreinigungssensoren 26a bis 26d als auch mit den Ionisierangseinrichtungen 28a bis 28c gekoppelt, um abhängig von der von den einzelnen Verunreinigungssensoren delektierten Konzentrationen bzw. Charakteristika der verunreinigenden Partikel die Betriebsbedingungen bzw. die Ansteuerung der Ionisierungseinrichtungen 28a bis 28c zu variieren. Dabei können einzelne der Ionisierungseinrichtungen 28a bis 28c entweder zu- oder abgeschalteten werden bzw. es kann die Versorgungsspannung einzelner Ionisierungseinrichtungen selektiv oder kollektiv variiert, d.h. erhöht oder erniedrigt werden. The control device 20 is coupled to both the purge sensors 26a to 26d and to the ionization devices 28a to 28c to be dependent to vary the operating conditions or the control of the ionization devices 28a to 28c from the concentrations or characteristics of the contaminating particles detected by the individual contamination sensors. In this case, individual ones of the ionization devices 28a to 28c can either be switched on or off or the supply voltage of individual ionization devices can be selectively or collectively varied, ie increased or decreased.
Beispielsweise kann, wenn mittels des Verunreinigungssensor 26c kein verunreinigtes Partikel detektiert werden kann bzw. wenn die Konzentration der verunreinigenden Partikel unterhalb eines vorbestimmten Maximalwertes bleibt, die Ionisierungseinrichtung 28c abgeschalteten werden. Selbstverständlich sind auch beliebige andere Steuer- bzw. Regelungsalgorithmen möglich. Durch den Einsatz der Verunreinigungssensoren 26a bis 26d bzw. einer Sensorik vor und/oder in dem Wirkbereich des Plasmas bzw. des elektrischen Feldes kann durch die Detektion beispielsweise der Größe und/oder der Anzahl des zu beeinflussenden Stoffes bzw. der verunreinigenden Partikel der dieses Plasma erzeugende Hochspannungs-Gleichstrom an- oder abgeschaltet bzw. in seiner Höhe variiert werden. Durch eine Kaskadenregelung, wie sie exemplarisch in Figur 2 dargestellt ist, ist zudem eine bedarfsabhängige Regelung unterteilt in einzelne Plasmazonen bzw. Zonen eines nicht verschwinden elektrischen Feldes realisierbar. For example, if no contaminated particle can be detected by the contaminant sensor 26c, or if the concentration of the contaminant particles remains below a predetermined maximum value, the ionizer 28c may be turned off. Of course, any other control algorithms are possible. By the use of the contamination sensors 26a to 26d or a sensor before and / or in the effective range of the plasma or the electric field can by detecting, for example, the size and / or the number of the substance to be influenced or the contaminating particles of this plasma generating high voltage DC switched on or off or be varied in height. By a cascade control, as shown by way of example in Figure 2, also a demand-dependent control is subdivided into individual plasma zones or zones of a non-disappearance electric field feasible.
Durch Ausführungsbeispiele der Erfindung wird ein Stromverbrauch bei der Reinigung mittels eines Plasmas bzw. mittels eines eine Ionisierung verursachenden elektrischen Feldes verringert. Ferner kann eine Verringerung der Ozon-Emission erreicht werden, sowie eine Verringerung des Verschleißes der Elektroden. By embodiments of the invention, a power consumption in the cleaning by means of a plasma or by means of an ionizing electric field is reduced. Furthermore, a reduction of the ozone emission can be achieved, as well as a reduction of the wear of the electrodes.
Figur 3 zeigt schematisch ein Ausführungsbeispiel eines Verfahrens zum Betreiben einer Reinigung s Vorrichtung zum Entfernen von verunreinigenden Partikeln aus einem in einer Flussrichtung entlang eines Strömungskanals strömenden Mediums, wobei die Reinigungsvorrichtung ausgebildet ist, um mittels sich auf unterschiedli- chen Seiten des Strömungskanals gegenüberliegenden Elektroden ein elektrisches Feld in dem Strömungskanal zu erzeugen. FIG. 3 shows schematically an embodiment of a method for operating a cleaning device for removing contaminating particles from a medium flowing in a flow direction along a flow channel, wherein the cleaning device is designed to use different Chen sides of the flow channel opposite electrodes to generate an electric field in the flow channel.
In einem Prüfschritt 40 wird eine Charakteristik der verunreinigenden Partikel in dem Medium bestimmt. Abhängig von der bestimmten Charakteristik wird in einem Steuer-/Regel Schritt 42 ein Betriebsmodus der Ionisierungseinrichtung variiert. In a test step 40, a characteristic of the contaminating particles in the medium is determined. Depending on the particular characteristic, in a control step 42, an operation mode of the ionization device is varied.
Obwohl bei den vorhergehenden Betrachtungen der Reinigungsvorrichtungen im Wesentlichen auf die Reinigung eines Mediums abgestellt wurde, versteht es sich von selbst, dass eine solche Reinigungsvorrichtung auch mit anderen Zielsetzungen verwendet werden kann. Although in the foregoing considerations of the cleaning devices has been directed essentially to the cleaning of a medium, it goes without saying that such a cleaning device can also be used with other objectives.
Beispielsweise können Ausführungsbeispiele einer Reinigungsvorrichtung als Dichtung verwendet werden, indem unerwünschte Teile bzw. Partikel aus einem ein Lager oder ein zu schützendes Bauteil umgebendem Medium, wie beispielsweise Luft oder Gas, entfernt werden, so dass diese nicht in das zu schützende Bauteil gelangen können. Beispielsweise können also weitere Ausführungsbeispiele der vorliegenden Reinigung s Vorrichtung in Lagern, insbesondere Gleitlagern und Wälzlagern verwendet werden, um das Lager vor Verunreinigung und vorzeitigem Verschleiß zu schützen. For example, embodiments of a cleaning device can be used as a seal by unwanted parts or particles from a bearing or a component to be protected surrounding medium, such as air or gas, are removed so that they can not get into the component to be protected. For example, therefore, further embodiments of the present cleaning s device in bearings, in particular plain bearings and bearings can be used to protect the bearing from contamination and premature wear.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
4 verunreinigende Partikel 4 contaminating particles
6 Flussrichtung 6 flow direction
8 Ionisierungseinlichtung 8 ionization illumination
lOAnode lOAnode
12 Kathode 12 cathode
14 Spannungs Versorgung  14 voltage supply
16 Verunreinigungssensor  16 pollution sensor
18 weiterer Verunreinigungssensor 20 Kontrolleinrichtung  18 further pollution sensor 20 control device
26a - 26d Verunreinigungssensoren 26a - 26d pollution sensors
28a - 28c Ionisierungseinrichtungen28a-28c ionization devices
30a - 30c Anoden 30a - 30c anodes
32a - 32c Kathoden  32a - 32c cathodes
40 Prüfschritt 40 test step
42 Steuer-/Regelschritt  42 control step

Claims

P a t e n t a n s p r ü c h e Reinigungsvorrichtung P atentansprü cleaning device
1. Reinigungsvorrichtung zum Entfernen von verunreinigenden Partikeln (4) aus einem in einer Flussrichtung (6) entlang eines Strömungskanals strömendem Medium, umfassend: eine Ionisierangseinrichtung (8), die ausgebildet ist, mittels eines sich auf unterschiedlichen Seiten des Strömungskanals gegenüberliegenden Elektrodenpaares (10, 12) ein elektrisches Feld in dem Strömungskanal zu erzeugen; zumindest einem Verunreinigungssensor (16), der ausgebildet ist, um eine Charakteristik der verunreinigenden Partikel in dem Medium zu bestimmen; und einer mit dem Veranreinigungssensor (16) und der Ionisierangseinrichtung (8) gekoppelten Kontrolleimichtung (20), die ausgebildet ist, einen Betriebsmodus der Ionisierangseimichtung (8) abhängig von der von dem Verunreinigungssensor (16) ermittelten Charakteristik der verunreinigenden Partikel (4) zu variieren. Cleaning device for removing contaminating particles (4) from a medium flowing in a flow direction (6) along a flow channel, comprising: an ionization device (8) which is formed by means of an electrode pair (10, 10) located opposite one another on different sides of the flow channel 12) to generate an electric field in the flow channel; at least one contaminant sensor (16) configured to determine a characteristic of the contaminating particles in the medium; and a control means (20) coupled to the purge sensor (16) and the ionization means (8) and configured to vary an operating mode of the ionization direction (8) depending on the contaminant particle (4) characteristic detected by the contaminant sensor (16) ,
2. Reinigungs Vorrichtung gemäß Ansprach 1 die ferner eine zweite mit der Kontrolleimichtung (20) gekoppelte Ionisierangseimichtung (28b) aufweist, die ausgebildet ist, mittels eines sich auf unterschiedlichen Seiten des Strö- mungskanals gegenüberliegenden zweiten Elektrodenpaars ein elektrisches Feld in dem Strömungskanal zu erzeugen , wobei die zweite Ionisierungseinrichtung (28b) in der Flussrichtung (6) nach der Ionisierungseinrichtung (28a) angeordnet ist. 2. cleaning device according to claim 1 further comprising a second with the Kontrollimichtung (20) coupled Ionisierangseimichtung (28 b), which is formed by means of a on different sides of the Strö- The second ionization device (28b) in the flow direction (6) after the ionization device (28a) is arranged to generate an electric field in the flow channel.
3. Reinigungsvorrichtung gemäß Anspruch 1 oder 2, bei der der Verunreinigungssensor (26a) ausgebildet ist, die Charakteristik der verunreinigenden Partikel in dem Medium in der Flussrichtung (6) vor der ersten (28a) oder der zweiten Ionisierangseinrichtung (28b) oder in der Flussrichtung (6) nach der zweiten Ionisierangseinrichtung (28b) zu bestimmen. A cleaning apparatus according to claim 1 or 2, wherein the contamination sensor (26a) is formed, the characteristic of the contaminating particles in the medium in the flow direction (6) before the first (28a) or the second Ionisierangseinrichtung (28b) or in the flow direction (6) after the second ionization device (28b).
4. Reinigung s Vorrichtung gemäß einem der Ansprüche 1 bis 3, bei der die Kontrolleinrichtung (20) ausgebildet ist, um bei Unterschreiten eines vorbestimmten Maximalwertes einer Konzentration der verunreinigenden Partikel (4) eine Betriebsspannung zwischen einer Anode und einer Kathode der Ionisierangseinrichtung (8; 28a) und /oder der zweiten Ionisierangseinrichtung (28b) zu verringern. 4. Cleaning device according to one of claims 1 to 3, wherein the control device (20) is formed to fall below a predetermined maximum value of a concentration of the contaminating particles (4) an operating voltage between an anode and a cathode of the Ionisierangseinrichtung (8; 28a) and / or the second ionization device (28b).
5. Reinigungsvorrichtung gemäß Ansprach 4, bei der die Kontrolleinrichtung (20) ausgebildet ist, bei Unterschreiten des vorbestimmten Maximalwertes eine Spannungsversorgung (14) für die erste und/oder die zweite Ionisierangseinrichtung (8; 28a, 28b) auszuschalten 5. Cleaning device according to claim 4, wherein the control device (20) is designed to turn off a voltage supply (14) for the first and / or the second Ionisierangseinrichtung (8; 28a, 28b) falls below the predetermined maximum value
6. Reinigung s Vorrichtung gemäß einem der vorhergehenden Ansprüche, bei der der Veranreinigungssensor einen IR-Sensor, einen Laserpartikelsensor, einen Luftpartikelzähler oder einen Ultraschallsensor umfasst. 6. Cleaning device according to one of the preceding claims, wherein the Veranreinigungssensor comprises an IR sensor, a laser particle sensor, an air particle counter or an ultrasonic sensor.
7. Reinigungs Vorrichtung gemäß einem der vorhergehenden Ansprüche, ferner umfassend: eine erste Spannungsquelle (14), die mit der ersten Ionisierangseinrichtung (8) derart gekoppelt ist, um zwischen der Anode und der Kathode eine elektrisches Feld zu erzeugen. 7. Cleaning device according to one of the preceding claims, further comprising: a first voltage source (14) coupled to the first ionizing means (8) so as to generate an electric field between the anode and the cathode.
8. Reinigungs Vorrichtung gemäß einem der Ansprüche 2 bis 7, bei der die Kathoden (32a, 32b) der ersten und der zweiten Ionisierangseinrichtungen (28a, 28b) kurzgeschlossen sind, um eine gemeinsame Kathode zu bilden. A cleaning device according to any one of claims 2 to 7, wherein the cathodes (32a, 32b) of the first and second ionizing means (28a, 28b) are short-circuited to form a common cathode.
9. Verfahren zum Betreiben einer Reinigungsvorrichtung zum Entfernen von verunreinigenden Partikeln aus einem in einer Flussrichtung (6) entlang eines Strömungskanals strömendem Medium, wobei die Reinigungsvorrichtung ausgebildet ist, um mittels sich auf unterschiedlichen Seiten des Strömungskanals gegenüberliegenden Elektroden (10, 12) ein elektrisches Feld in dem Strömungskanal zu erzeugen, mit folgenden Schritten: bestimmen einer Charakteristik der verunreinigenden Partikel in dem Gas; und variieren eines Betriebsmoduses der Ionisierungseinrichtung, abhän; 9. A method for operating a cleaning device for removing contaminating particles from a flowing in a flow direction (6) along a flow channel medium, wherein the cleaning device is formed to an electric field by means of on opposite sides of the flow channel opposite electrodes (10, 12) in the flow channel, comprising the steps of: determining a characteristic of the contaminating particles in the gas; and vary an operation mode of the ionization device, depending;
der bestimmten Charakteristik der verunreinigenden Partikel.  the specific characteristic of the contaminating particles.
10. Verwendung einer Reinigungs Vorrichtung gemäß einem der Ansprüche 1 bis 8 zum Schutz eines Lagers , insbesondere eines Wälzlagers, vor verunreinigenden Partikeln. 10. Use of a cleaning device according to one of claims 1 to 8 for the protection of a bearing, in particular a rolling bearing, from contaminating particles.
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