EP3784410A1 - Method and device for atomizing a liquid with a high degree of viscosity, in particular a highly viscous liquid - Google Patents

Method and device for atomizing a liquid with a high degree of viscosity, in particular a highly viscous liquid

Info

Publication number
EP3784410A1
EP3784410A1 EP19714133.6A EP19714133A EP3784410A1 EP 3784410 A1 EP3784410 A1 EP 3784410A1 EP 19714133 A EP19714133 A EP 19714133A EP 3784410 A1 EP3784410 A1 EP 3784410A1
Authority
EP
European Patent Office
Prior art keywords
liquid
mixing chamber
highly viscous
carrier medium
atomized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19714133.6A
Other languages
German (de)
French (fr)
Inventor
Bernd Stuke
Lars Olems
Michael Diez
Christoph Benz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3784410A1 publication Critical patent/EP3784410A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
    • B05B17/063—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn having an internal channel for supplying the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0433—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of gas surrounded by an external conduit of liquid upstream the mixing chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/166—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the material to be sprayed being heated in a container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/168—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed with means for heating or cooling after mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/1693—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed with means for heating the material to be sprayed or an atomizing fluid in a supply hose or the like

Definitions

  • the invention relates to a method for atomising a highly viscous, especially highly viscous liquid having the features of the preamble of claim 1. Furthermore, the invention relates to a device for carrying out the method according to the invention.
  • a more viscous liquid is understood as meaning a liquid whose viscosity is greater than 100 mPas at a temperature of 20 ° C.
  • a highly viscous liquid is understood as meaning a liquid whose viscosity is greater than 1000 mPas at a temperature of 20 ° C.
  • the liquid may be an adhesive, a silicone oil or a thick-film paint.
  • the present invention is therefore based on the object of simplifying the atomization of higher-viscosity, in particular high-viscosity liquids.
  • the aim is to Viscous, especially highly viscous liquid are decomposed into very small drops, so that very fine layers of the liquid can be produced.
  • Proposed is a method for atomising a highly viscous, especially highly viscous liquid by means of a pressurized gaseous or liquid carrier medium, which is discharged using a spray device.
  • the liquid to be atomized is fed to a mixing chamber of the spray device, through which the pressurized carrier medium is passed during discharge, so that the liquid to be atomized is entrained by the carrier medium.
  • the highly viscous, especially highly viscous liquid is disassembled during discharge through the spray device in the smallest drops, so that extremely thin layers of the liquid can be produced.
  • the carrier medium is adjusted to the respective higher-viscous, especially highly viscous liquid. If, for example, the liquid is a water-based sealing layer varnish, water can be used as a carrier medium. The same applies if the liquid is a water-dilutable silicone oil. Otherwise, a solvent can also be used as the carrier medium.
  • the carrier medium can be both a liquid and a gas. It is important that the carrier medium is pressurized, preferably subjected to high pressure, in order to introduce the pulse required for atomising the higher-viscosity, in particular highly viscous liquid.
  • Flochtik has the advantage that a correspondingly strong pulse can be introduced, so that the atomization of the more viscous, especially highly viscous liquid is further optimized.
  • a needle valve with a nozzle and a nozzle-side mounted adapter is used as a spray device.
  • the adapter forms the mixing chamber out.
  • Needle valves are known, for example, from fuel injection technology. By means of such needle valves, also called fuel injectors, fuels are injected under very high pressure into a combustion chamber of an internal combustion engine. The injection pressure can be 2,000 to 3,000 bar. If a needle valve known from fuel injection technology is used to carry out the method according to the invention, correspondingly high pressures can be achieved, which proves to be an advantage in the atomization of a more viscous, especially highly viscous liquid. In addition, sophisticated technology and existing components can be used so that costs can be saved.
  • a carrier medium whose viscosity is well below the viscosity of the liquid to be atomized.
  • a carrier medium is used whose viscosity is less than 300 mPas, more preferably less than 100 mPas at a temperature of 20 ° C.
  • Carrier media whose viscosity is above can not be switched or atomized by means of a conventional fuel injector.
  • the carrier medium be discharged by means of the spray device in a pulsed process. This means that several successive pulses are generated which entrain the higher-viscosity or high-viscosity liquid present in the mixing chamber. Since pulsed methods are also used in the injection of fuels, this technique can be used.
  • the higher viscous, in particular highly viscous liquid to be atomized before it is fed to the mixing chamber, with pressure, preferably at high pressure, applied.
  • pressure preferably at high pressure
  • the higher-viscosity or highly viscous liquid can be stored in a pressure vessel and / or compressed by means of a pump, preferably by means of a high-pressure pump, before being introduced into the mixing chamber.
  • a pump known from fuel injection technology in particular a high-pressure pump, can be used as the pump.
  • a designed as a piston pump high-pressure pump can be used.
  • the higher-viscous or highly viscous liquid to be atomized is heated by means of a heating device.
  • a heating device By heating the liquid, the viscosity of the liquid can be reduced so that it can be atomized more easily.
  • the liquid can be heated before entering the mixing chamber and / or in the mixing chamber.
  • the further proposed device for carrying out the method according to the invention comprises a spraying device with a mixing chamber having an inlet and an outlet for a pressurized gaseous or liquid carrier medium and a connection to a fluid line, by means of which the mixing chamber stored in a fluid container Sirikose, in particular highly viscous liquid can be supplied.
  • the pressurized carrier medium causes a pulse, which causes the liquid supplied to the mixing chamber is entrained and atomized during discharge. In this way, the smallest droplets can be formed, which are suitable for the production of extremely thin layers.
  • the spray device comprises a needle valve with a nozzle and a nozzle-side mounted adapter for forming the mixing chamber.
  • the needle valve may in particular be a needle valve known from fuel injection technology, in particular a fuel injector.
  • injection pressures over 2,000 bar can be achieved, which favors the formation of very fine droplets.
  • a uniform droplet distribution can be achieved.
  • the needle valve Since such needle valve are usually not suitable for spraying higher viscous, especially highly viscous liquids, the needle valve on the nozzle side, an adapter forming the mixing chamber. The more viscous or highly viscous liquid is therefore not passed through the needle valve, but fed only to the downstream mixing chamber.
  • the pulse required for sputtering is introduced through the pressurized carrier medium which is passed through the mixing chamber, entraining the more viscous or highly viscous liquid. This makes it possible to use known from the fuel injection needle valves for atomizing higher viscosity or highly viscous liquids.
  • At least one heating device is provided for heating the higher-viscosity, in particular high-viscosity, liquid.
  • the heating of the liquid leads to a reduction of the viscosity of the liquid, so that it can be atomized more easily.
  • the heating device may be arranged on the mixing chamber, on the fluid line and / or on the fluid container.
  • an ultrasonic transducer in particular in the form of a piezoceramic element, be provided for generating mechanical vibrations.
  • the ultrasonic transducer converts electrical vibrations into mechanical ones that are transferred to the fluid and the carrier medium.
  • the vibration excitation promotes the formation of very fine droplets by lowering the surface tension. As a result, an even better atomization of the higher-viscosity liquid is achieved.
  • the ultrasonic transducer is preferably arranged in the region of the outlet of the mixing chamber.
  • FIG. 1 shows a schematic longitudinal section through a device according to the invention according to a first preferred embodiment
  • FIG. 2 shows a schematic longitudinal section through a device according to the invention according to a second preferred embodiment
  • Fig. 3 is a schematic longitudinal section through an inventive device according to a third preferred embodiment.
  • Fig. 4 is a schematic longitudinal section through an inventive device according to a fourth preferred embodiment.
  • the device shown in FIG. 1 is used to atomise a higher viscous, especially highly viscous liquid 1 by means of a pressurized carrier medium 2. It comprises a spraying device 3 with a needle valve 5 and an adapter 7, which is used to form a mixing chamber 4 on a nozzle. 6 of the needle valve 5 is placed. In the nozzle 6, an inlet 10 is formed in the mixing chamber 4 for the support medium 2.
  • the highly viscous or highly viscous liquid 1 to be atomized is supplied to the mixing chamber 4 via a fluid line 12, which connects the mixing chamber 4 to a fluid container 13, in which the liquid 1 is stored.
  • the carrier medium 2 and the liquid are discharged together via an outlet 11, which is formed in the adapter 7.
  • the carrier medium 2 is pressurized, in particular high pressure.
  • a pump 14 which may be, for example, a high-pressure pump in the manner of a high-pressure fuel pump. If a nozzle needle 16 of the needle valve 5 releases the inlet 10 formed in the nozzle 6, the pressurized carrier medium 2 enters the mixing chamber 4, in which the highly viscous or highly viscous liquid to be atomized is obtained. place. On the way towards the outlet 11, the carrier medium 2 entrains the more viscous or highly viscous liquid, so that it is discharged together with the carrier medium 2 via the outlet 11 and finely atomized.
  • FIG. 1 A further preferred embodiment of a device according to the invention is shown in FIG.
  • another pump 15 for pressurizing in particular Flochdruckbeaufschlagung the higher viscosity or highly viscous liquid 1 is provided, which is connected upstream of the fluid container 13.
  • the pump 15 may be analogous to the pump 14, in particular as a piston pump.
  • the device according to the invention for atomising a highly viscous, especially highly viscous liquid 1 shown in FIG. 1 has Fleizvoriquesen 8, which are arranged on the fluid container 13, on the fluid line 12 and on the mixing chamber 4. Instead of several Fleizvoriquesen 8, only one Fleizvor puzzle 8 may be provided.
  • the at least one Fleizvorraum 8 the higher-viscosity or highly viscous liquid 1 can be heated, whereby the viscosity of the liquid 1 is reduced. The lower the viscosity of the liquid 1, the easier it can be atomized.
  • FIG. 4 shows a further preferred embodiment of a device according to the invention for atomising a highly viscous, in particular highly viscous liquid 1.
  • the device additionally has an ultrasonic transducer 9, which is arranged in the region of the outlet 11 and contributes to the fact that the liquid 1 is atomized even finer.
  • the ultrasonic transducer 9 may be, for example, a piezoceramic element that converts electrical vibrations into mechanical and transmits them to the liquid 1 and the carrier medium 2.
  • FIGS. 1 to 4 can each be used individually or in different combinations for realizing the invention.

Abstract

The invention relates to a method for atomizing a liquid (1) with a high degree of viscosity, in particular a highly viscous liquid, using a pressurized gaseous or liquid carrier medium (2) which is discharged using a spray device (3). According to the invention, the liquid (1) to be atomized is supplied to a mixing chamber (4) of the spray device (3), through which the pressurized carrier medium (2) is conducted during the discharge process such that the liquid (1) to be atomized is carried along with the carrier medium (2). The invention additionally relates to a device for carrying out the method.

Description

Beschreibung  description
Titel: Title:
Verfahren und Vorrichtung zum Zerstäuben einer höher viskosen, insbesondere hochviskosen Flüssigkeit  Method and device for atomising a highly viscous, especially highly viscous liquid
Die Erfindung betrifft ein Verfahren zum Zerstäuben einer höher viskosen, insbesondere hochviskosen Flüssigkeit mit den Merkmalen des Oberbegriffs des Anspruchs 1. Ferner betrifft die Erfindung eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens. The invention relates to a method for atomising a highly viscous, especially highly viscous liquid having the features of the preamble of claim 1. Furthermore, the invention relates to a device for carrying out the method according to the invention.
Unter einer höher viskosen Flüssigkeit wird vorliegend eine Flüssigkeit verstanden, deren Viskosität größer als 100 mPas bei einer Temperatur von 20°C beträgt. Unter einer hochviskosen Flüssigkeit wird vorliegend eine Flüssigkeit verstanden, deren Viskosität größer als 1000 mPas bei einer Temperatur von 20°C beträgt. Beispielsweise kann es sich bei der Flüssigkeit um einen Klebstoff, ein Silikonöl oder einen Dickschichtlack handeln. In the present case, a more viscous liquid is understood as meaning a liquid whose viscosity is greater than 100 mPas at a temperature of 20 ° C. In the present case, a highly viscous liquid is understood as meaning a liquid whose viscosity is greater than 1000 mPas at a temperature of 20 ° C. For example, the liquid may be an adhesive, a silicone oil or a thick-film paint.
Stand der Technik State of the art
Es gibt eine Vielzahl an Anwendungen, in denen höher viskose, insbesondere hochviskose Flüssigkeiten zum Beschichten eingesetzt werden. Beispielhaft kann auf die Pharmaindustrie verwiesen werden, die beispielsweise hochviskose Silikonöle zum Beschichten einsetzt. Um möglichst dünne Schichten auszubilden, muss die Flüssigkeit fein zerstäubt werden. Dies erweist sich jedoch bei Einsatz einer hochviskosen Flüssigkeit als schwierig. There are a variety of applications in which higher viscous, especially highly viscous liquids are used for coating. By way of example, reference may be made to the pharmaceutical industry, which uses, for example, highly viscous silicone oils for coating. In order to form as thin layers as possible, the liquid must be finely atomized. However, this proves to be difficult when using a highly viscous liquid.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, das Zerstäuben höher viskoser, insbesondere hochviskoser Flüssigkeiten zu vereinfachen. Dabei soll die hö- her viskose, insbesondere hochviskose Flüssigkeit in kleinste Tropfen zerlegt werden, so dass sehr feine Schichten aus der Flüssigkeit herstellbar sind. The present invention is therefore based on the object of simplifying the atomization of higher-viscosity, in particular high-viscosity liquids. The aim is to Viscous, especially highly viscous liquid are decomposed into very small drops, so that very fine layers of the liquid can be produced.
Zur Lösung der Aufgabe werden das Verfahren mit den Merkmalen des Anspruchs 1 sowie die Vorrichtung mit den Merkmalen des Anspruchs 7 vorgeschlagen. Vorteilhafte Weiterbildungen der Erfindung sind den jeweiligen Unteransprüchen zu entnehmen. To solve the problem, the method with the features of claim 1 and the device with the features of claim 7 are proposed. Advantageous developments of the invention can be found in the respective subclaims.
Offenbarung der Erfindung Disclosure of the invention
Vorgeschlagen wird ein Verfahren zum Zerstäuben einer höher viskosen, insbesondere hochviskosen Flüssigkeit mit Hilfe eines druckbeaufschlagten gasförmigen oder flüssigen Trägermediums, das unter Verwendung einer Spritzvorrichtung ausgetragen wird. Erfindungsgemäß wird die zu zerstäubende Flüssigkeit einer Mischkammer der Spritzvorrichtung zugeführt, durch welche das druckbeaufschlagte Trägermedium beim Austragen hindurch geleitet wird, so dass die zu zerstäubende Flüssigkeit von dem Trägermedium mitgerissen wird. Auf diese Weise wird die höher viskose, insbesondere hochviskose Flüssigkeit beim Austragen über die Spritzvorrichtung in kleinste Tropfen zerlegt, so dass extrem dünne Schichten aus der Flüssigkeit herstellbar sind. Proposed is a method for atomising a highly viscous, especially highly viscous liquid by means of a pressurized gaseous or liquid carrier medium, which is discharged using a spray device. According to the invention, the liquid to be atomized is fed to a mixing chamber of the spray device, through which the pressurized carrier medium is passed during discharge, so that the liquid to be atomized is entrained by the carrier medium. In this way, the highly viscous, especially highly viscous liquid is disassembled during discharge through the spray device in the smallest drops, so that extremely thin layers of the liquid can be produced.
Das Trägermedium wird dabei auf die jeweilige höher viskose, insbesondere hochviskose Flüssigkeit abgestimmt. Flandelt es sich beispielsweise bei der Flüssigkeit um einen wasserbasierten Dichtschichtlack, kann Wasser als Trägermedium eingesetzt werden. Gleiches gilt, wenn die Flüssigkeit ein mit Wasser verdünnbares Silikonöl ist. Andernfalls kann auch ein Lösungsmittel als Trägermedium eingesetzt werden. The carrier medium is adjusted to the respective higher-viscous, especially highly viscous liquid. If, for example, the liquid is a water-based sealing layer varnish, water can be used as a carrier medium. The same applies if the liquid is a water-dilutable silicone oil. Otherwise, a solvent can also be used as the carrier medium.
Bei dem Trägermedium kann es sich sowohl um eine Flüssigkeit als auch um ein Gas handeln. Wichtig ist, dass das Trägermedium druckbeaufschlagt ist, vorzugsweise hochdruckbeaufschlagt ist, um den zum Zerstäuben der höher viskosen, insbesondere hochviskosen Flüssigkeit erforderlichen Impuls einzubringen. Flochdruck besitzt den Vorteil, dass ein entsprechend starker Impuls einbringbar ist, so dass die Zerstäubung der höher viskosen, insbesondere hochviskosen Flüssigkeit weiter optimiert wird. The carrier medium can be both a liquid and a gas. It is important that the carrier medium is pressurized, preferably subjected to high pressure, in order to introduce the pulse required for atomising the higher-viscosity, in particular highly viscous liquid. Flochdruck has the advantage that a correspondingly strong pulse can be introduced, so that the atomization of the more viscous, especially highly viscous liquid is further optimized.
Vorteilhafterweise wird ein Nadelventil mit einer Düse und einem düsenseitig aufgesetzten Adapter als Spritzvorrichtung verwendet. Der Adapter bildet dabei die Misch- kammer aus. Nadelventile sind beispielsweise aus der Kraftstoffeinspritztechnik bekannt. Mittels derartiger Nadelventile, auch Kraftstoffinjektoren genannt, werden Kraftstoffe unter sehr hohem Druck in einen Brennraum einer Brennkraftmaschine eingespritzt. Der Einspritzdruck kann dabei 2.000 bis 3.000 bar betragen. Wird ein aus der Kraftstoffeinspritztechnik bekanntes Nadelventil zur Durchführung des erfindungsgemäßen Verfahrens eingesetzt, können entsprechend hohe Drücke erzielt werden, was sich als Vorteil bei der Zerstäubung einer höher viskosen, insbesondere hochviskosen Flüssigkeit erweist. Zudem kann auf eine ausgereifte Technik und bereits vorhandene Komponenten zurückgegriffen werden, so dass Kosten eingespart werden. Advantageously, a needle valve with a nozzle and a nozzle-side mounted adapter is used as a spray device. The adapter forms the mixing chamber out. Needle valves are known, for example, from fuel injection technology. By means of such needle valves, also called fuel injectors, fuels are injected under very high pressure into a combustion chamber of an internal combustion engine. The injection pressure can be 2,000 to 3,000 bar. If a needle valve known from fuel injection technology is used to carry out the method according to the invention, correspondingly high pressures can be achieved, which proves to be an advantage in the atomization of a more viscous, especially highly viscous liquid. In addition, sophisticated technology and existing components can be used so that costs can be saved.
Der Einsatz eines aus der Kraftstoffeinspritztechnik bekannten Nadelventils erfordert ein Trägermedium, dessen Viskosität deutlich unter der Viskosität des zu zerstäubenden Flüssigkeit liegt. Vorzugsweise wird daher ein Trägermedium eingesetzt, dessen Viskosität weniger als 300 mPas, weiterhin vorzugsweise weniger als 100 mPas bei einer Temperatur von 20°C beträgt. Trägermedien, deren Viskosität darüber liegt, können mittels eines herkömmlichen Kraftstoffinjektors nicht geschaltet bzw. zerstäubt werden. The use of a known from the fuel injection needle valve requires a carrier medium whose viscosity is well below the viscosity of the liquid to be atomized. Preferably, therefore, a carrier medium is used whose viscosity is less than 300 mPas, more preferably less than 100 mPas at a temperature of 20 ° C. Carrier media whose viscosity is above can not be switched or atomized by means of a conventional fuel injector.
Folglich wird daher bei dem erfindungsgemäßen Verfahren die zu zerstäubende höher viskose oder hochviskose Flüssigkeit nicht über das Nadelventil ausgetragen, sondern über einen nachgeschalteten Adapter, der hierzu auf die Düse des Nadelventils aufgesetzt wird. Auf diese Weise ist es möglich, einen herkömmlichen Kraftstoffinjektor beim Zerstäuben einer höher viskosen oder hochviskosen Flüssigkeit einzusetzen. Consequently, therefore, in the inventive method to be atomized higher viscous or highly viscous liquid is not discharged through the needle valve, but via a downstream adapter, which is placed for this purpose on the nozzle of the needle valve. In this way it is possible to use a conventional fuel injector in atomising a more viscous or highly viscous liquid.
In Weiterbildung der Erfindung wird vorgeschlagen, dass das Trägermedium mittels der Spritzvorrichtung in einem gepulsten Verfahren ausgetragen wird. Das heißt, dass mehrere aufeinanderfolgende Impulse erzeugt werden, welche die in der Mischkammer vorhandene höher viskose oder hochviskose Flüssigkeit mitreißen. Da auch bei der Einspritzung von Kraftstoffen gepulste Verfahren eingesetzt werden, kann auf diese Technik zurückgegriffen werden. In a development of the invention, it is proposed that the carrier medium be discharged by means of the spray device in a pulsed process. This means that several successive pulses are generated which entrain the higher-viscosity or high-viscosity liquid present in the mixing chamber. Since pulsed methods are also used in the injection of fuels, this technique can be used.
Vorteilhaftweise wird die zu zerstäubende höher viskose, insbesondere hochviskose Flüssigkeit, bevor sie der Mischkammer zugeführt wird, mit Druck, vorzugsweise mit Hochdruck, beaufschlagt. Durch die Druckbeaufschlagung der zu zerstäubenden Flüs- sigkeit kann die Zerstäubungswirkung weiter optimiert werden. Hierzu kann die höher viskose oder hochviskose Flüssigkeit in einem Druckbehälter bevorratet und/oder mittels einer Pumpe, vorzugsweise mittels einer Hochdruckpumpe, vor dem Einleiten in die Mischkammer verdichtet werden. Als Pumpe kann wiederum eine aus der Kraftstoffeinspritztechnik bekannte Pumpe, insbesondere Hochdruckpumpe, verwendet werden. Gleiches gilt für die Druckbeaufschlagung des Trägermediums. Beispielsweise kann eine als Kolbenpumpe ausgeführte Hochdruckpumpe eingesetzt werden. Advantageously, the higher viscous, in particular highly viscous liquid to be atomized, before it is fed to the mixing chamber, with pressure, preferably at high pressure, applied. By pressurizing the liquid to be atomized The atomizing effect can be further optimized. For this purpose, the higher-viscosity or highly viscous liquid can be stored in a pressure vessel and / or compressed by means of a pump, preferably by means of a high-pressure pump, before being introduced into the mixing chamber. In turn, a pump known from fuel injection technology, in particular a high-pressure pump, can be used as the pump. The same applies to the pressurization of the carrier medium. For example, a designed as a piston pump high-pressure pump can be used.
Alternativ oder ergänzend wird vorgeschlagen, dass die zu zerstäubende höher viskose oder hochviskose Flüssigkeit mit Hilfe einer Heizvorrichtung erwärmt wird. Durch Erwärmen der Flüssigkeit kann die Viskosität der Flüssigkeit herabgesetzt werden, so dass sich diese leichter zerstäuben lässt. Die Flüssigkeit kann bereits vor Eintritt in die Mischkammer und/oder in der Mischkammer erwärmt werden. Alternatively or additionally, it is proposed that the higher-viscous or highly viscous liquid to be atomized is heated by means of a heating device. By heating the liquid, the viscosity of the liquid can be reduced so that it can be atomized more easily. The liquid can be heated before entering the mixing chamber and / or in the mixing chamber.
Darüber hinaus wird alternativ oder ergänzend vorgeschlagen, dass mit Hilfe eines Ultraschallwandlers mechanische Schwingungen erzeugt und auf die zu zerstäubende Flüssigkeit und das Trägermedium übertragen werden. Mit Hilfe der Schwingungsanregung kann die Tropfenbildung verbessert, insbesondere der Tropfendurchmesser verringert werden, so dass eine besonders feine Zerstäubung erreicht wird. Denn mit steigender Frequenz der Schwingungsanregung verringert sich die Oberflächenspannung der Flüssigkeit, was die Ausbildung kleinster Tröpfchen begünstigt. Als Ultraschallwandler kann insbesondere ein piezokeramisches Element verwendet werden, das elektrische Schwingungen in mechanische umsetzt. In addition, as an alternative or in addition, it is proposed that mechanical vibrations are generated with the aid of an ultrasonic transducer and transmitted to the liquid to be atomized and the carrier medium. With the help of the vibration excitation, the formation of drops can be improved, in particular the drop diameter can be reduced, so that a particularly fine atomization is achieved. Because with increasing frequency of vibration excitation, the surface tension of the liquid decreases, which favors the formation of very small droplets. As an ultrasonic transducer, in particular a piezoceramic element can be used, which converts electrical vibrations into mechanical ones.
Die ferner vorgeschlagene Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens umfasst eine Spritzvorrichtung mit einer Mischkammer, die einen Einlass und einen Auslass für ein druckbeaufschlagtes gasförmiges oder flüssiges Trägermedium sowie einen Anschluss an eine Fluidleitung besitzt, mittels welcher der Mischkammer eine in einem Fluidbehälter bevorratete höher viskose, insbesondere hochviskose Flüssigkeit zuführbar ist. Das druckbeaufschlagte Trägermedium bewirkt einen Impuls, der dazu führt, dass die der Mischkammer zugeführte Flüssigkeit mitgerissen und beim Austragen zerstäubt wird. Auf diese Weise lassen sich kleinste Tröpfchen ausbilden, die zur Herstellung extrem dünner Schichten geeignet sind. Gemäß einer bevorzugten Ausführungsform der Erfindung umfasst die Spritzvorrichtung ein Nadelventil mit einer Düse und einen düsenseitig aufgesetzten Adapter zur Ausbildung der Mischkammer. Bei dem Nadelventil kann es sich insbesondere um ein aus der Kraftstoffeinspritztechnik bekanntes Nadelventil, insbesondere um einen Kraftstoffinjektor, handeln. Mittels derartiger Nadelventile können Einspritzdrücke über 2.000 bar erreicht werden, was die Ausbildung feinster Tröpfchen begünstigt. Zudem kann eine gleichmäßige Tröpfchenverteilung erzielt werden. The further proposed device for carrying out the method according to the invention comprises a spraying device with a mixing chamber having an inlet and an outlet for a pressurized gaseous or liquid carrier medium and a connection to a fluid line, by means of which the mixing chamber stored in a fluid container hochviskose, in particular highly viscous liquid can be supplied. The pressurized carrier medium causes a pulse, which causes the liquid supplied to the mixing chamber is entrained and atomized during discharge. In this way, the smallest droplets can be formed, which are suitable for the production of extremely thin layers. According to a preferred embodiment of the invention, the spray device comprises a needle valve with a nozzle and a nozzle-side mounted adapter for forming the mixing chamber. The needle valve may in particular be a needle valve known from fuel injection technology, in particular a fuel injector. By means of such needle valves injection pressures over 2,000 bar can be achieved, which favors the formation of very fine droplets. In addition, a uniform droplet distribution can be achieved.
Da derartige Nadelventil in der Regel nicht zum Zerstäuben höher viskoser, insbesondere hochviskoser Flüssigkeiten geeignet sind, weist das Nadelventil düsenseitig einen die Mischkammer ausbildenden Adapter auf. Die höher viskose oder hochviskose Flüssigkeit wird demnach nicht durch das Nadelventil geführt, sondern lediglich der nachgeschalteten Mischkammer zugeführt. Der zum Zerstäuben erforderliche Impuls wird durch das druckbeaufschlagte Trägermedium eingebracht, das durch die Mischkammer hindurch geleitet wird und dabei die höher viskose oder hochviskose Flüssigkeit mitreißt. Dadurch ist es möglich, aus der Kraftstoffeinspritztechnik bekannte Nadelventile zum Zerstäuben höher viskoser oder hochviskoser Flüssigkeiten einzusetzen. Since such needle valve are usually not suitable for spraying higher viscous, especially highly viscous liquids, the needle valve on the nozzle side, an adapter forming the mixing chamber. The more viscous or highly viscous liquid is therefore not passed through the needle valve, but fed only to the downstream mixing chamber. The pulse required for sputtering is introduced through the pressurized carrier medium which is passed through the mixing chamber, entraining the more viscous or highly viscous liquid. This makes it possible to use known from the fuel injection needle valves for atomizing higher viscosity or highly viscous liquids.
Vorteilhafterweise ist mindestens eine Heizvorrichtung zum Erwärmen der höher viskosen, insbesondere hochviskosen Flüssigkeit vorgesehen. Das Erwärmen der Flüssigkeit führt zu einer Herabsetzung der Viskosität der Flüssigkeit, so dass sich diese leichter zerstäuben lässt. Die Heizvorrichtung kann an der Mischkammer, an der Fluidleitung und/oder an dem Fluidbehälter angeordnet sein. Advantageously, at least one heating device is provided for heating the higher-viscosity, in particular high-viscosity, liquid. The heating of the liquid leads to a reduction of the viscosity of the liquid, so that it can be atomized more easily. The heating device may be arranged on the mixing chamber, on the fluid line and / or on the fluid container.
Alternativ oder ergänzend kann ein Ultraschallwandler, insbesondere in Form eines piezokeramischen Elements, zur Erzeugung mechanischer Schwingungen vorgesehen sein. Der Ultraschallwandler wandelt elektrische Schwingungen in mechanische um, die auf die Flüssigkeit und das Trägermedium übertragen werden. Die Schwingungsanregung begünstigt die Ausbildung feinster Tröpfchen dadurch, dass die Oberflächenspannung herabgesetzt wird. Dadurch wird eine noch bessere Zerstäubung der höher viskosen Flüssigkeit erreicht. Der Ultraschallwandler ist hierzu bevorzugt im Bereich des Auslasses der Mischkammer angeordnet. Bevorzugte Ausführungsformen der Erfindung werden nachfolgend anhand der beigefügten Zeichnungen näher erläutert. Diese zeigen: Alternatively or additionally, an ultrasonic transducer, in particular in the form of a piezoceramic element, be provided for generating mechanical vibrations. The ultrasonic transducer converts electrical vibrations into mechanical ones that are transferred to the fluid and the carrier medium. The vibration excitation promotes the formation of very fine droplets by lowering the surface tension. As a result, an even better atomization of the higher-viscosity liquid is achieved. For this purpose, the ultrasonic transducer is preferably arranged in the region of the outlet of the mixing chamber. Preferred embodiments of the invention are explained below with reference to the accompanying drawings. These show:
Fig. 1 einen schematischen Längsschnitt durch eine erfindungsgemäße Vorrichtung gemäß einer ersten bevorzugten Ausführungsform, 1 shows a schematic longitudinal section through a device according to the invention according to a first preferred embodiment,
Fig. 2 einen schematischen Längsschnitt durch eine erfindungsgemäße Vorrichtung gemäß einer zweiten bevorzugten Ausführungsform, 2 shows a schematic longitudinal section through a device according to the invention according to a second preferred embodiment,
Fig. 3 einen schematischen Längsschnitt durch eine erfindungsgemäße Vorrichtung gemäß einer dritten bevorzugten Ausführungsform, und Fig. 3 is a schematic longitudinal section through an inventive device according to a third preferred embodiment, and
Fig. 4 einen schematischen Längsschnitt durch eine erfindungsgemäße Vorrichtung gemäß einer vierten bevorzugten Ausführungsform. Fig. 4 is a schematic longitudinal section through an inventive device according to a fourth preferred embodiment.
Ausführliche Beschreibung der Zeichnungen Detailed description of the drawings
Die in der Fig. 1 dargestellte Vorrichtung dient der Zerstäubung einer höher viskosen, insbesondere hochviskosen Flüssigkeit 1 mit Hilfe eines druckbeaufschlagten Trägermediums 2. Sie umfasst eine Spritzvorrichtung 3 mit einem Nadelventil 5 und einem Adapter 7, der zur Ausbildung einer Mischkammer 4 auf eine Düse 6 des Nadelventils 5 aufgesetzt ist. In der Düse 6 ist ein Einlass 10 in die Mischkammer 4 für das Trägermedium 2 ausgebildet. Die zu zerstäubende höher viskose bzw. hochviskose Flüssigkeit 1 wird der Mischkammer 4 über eine Fluidleitung 12 zugeführt, welche die Mischkammer 4 mit einem Fluidbehälter 13 verbindet, in dem die Flüssigkeit 1 bevorratet wird. Das Trägermedium 2 und die Flüssigkeit werden gemeinsam über einen Auslass 11 ausgetragen, der im Adapter 7 ausgebildet ist. The device shown in FIG. 1 is used to atomise a higher viscous, especially highly viscous liquid 1 by means of a pressurized carrier medium 2. It comprises a spraying device 3 with a needle valve 5 and an adapter 7, which is used to form a mixing chamber 4 on a nozzle. 6 of the needle valve 5 is placed. In the nozzle 6, an inlet 10 is formed in the mixing chamber 4 for the support medium 2. The highly viscous or highly viscous liquid 1 to be atomized is supplied to the mixing chamber 4 via a fluid line 12, which connects the mixing chamber 4 to a fluid container 13, in which the liquid 1 is stored. The carrier medium 2 and the liquid are discharged together via an outlet 11, which is formed in the adapter 7.
Das Trägermedium 2 ist druckbeaufschlagt, insbesondere hochdruckbeaufschlagt. Hierzu weist die dargestellte Vorrichtung eine Pumpe 14 auf, wobei es sich beispielsweise um eine Hochdruckpumpe nach Art einer Kraftstoffhochdruckpumpe handeln kann. Gibt eine Düsennadel 16 des Nadelventils 5 den in der Düse 6 ausgebildeten Einlass 10 frei, gelangt das druckbeaufschlagte Trägermedium 2 in die Mischkammer 4, in der sich die zu zerstäubende höher viskose bzw. hochviskose Flüssigkeit be- findet. Auf dem Weg in Richtung Auslass 11 reißt das Trägermedium 2 die höher viskose bzw. hochviskose Flüssigkeit mit, so dass diese gemeinsam mit dem Trägermedium 2 über den Auslass 11 ausgetragen und fein zerstäubt wird. The carrier medium 2 is pressurized, in particular high pressure. For this purpose, the device shown on a pump 14, which may be, for example, a high-pressure pump in the manner of a high-pressure fuel pump. If a nozzle needle 16 of the needle valve 5 releases the inlet 10 formed in the nozzle 6, the pressurized carrier medium 2 enters the mixing chamber 4, in which the highly viscous or highly viscous liquid to be atomized is obtained. place. On the way towards the outlet 11, the carrier medium 2 entrains the more viscous or highly viscous liquid, so that it is discharged together with the carrier medium 2 via the outlet 11 and finely atomized.
Eine weitere bevorzugte Ausführungsform einer erfindungsgemäßen Vorrichtung ist in der Fig. 2 dargestellt. Hier ist eine weitere Pumpe 15 zur Druckbeaufschlagung, insbesondere Flochdruckbeaufschlagung der höher viskosen bzw. hochviskosen Flüssigkeit 1 vorgesehen, die dem Fluidbehälter 13 vorgeschaltet ist. Die Pumpe 15 kann analog der Pumpe 14, insbesondere als Kolbenpumpe, ausgebildet sein. A further preferred embodiment of a device according to the invention is shown in FIG. Here is another pump 15 for pressurizing, in particular Flochdruckbeaufschlagung the higher viscosity or highly viscous liquid 1 is provided, which is connected upstream of the fluid container 13. The pump 15 may be analogous to the pump 14, in particular as a piston pump.
Die in der Fig. 3 dargestellte erfindungsgemäße Vorrichtung zum Zerstäuben einer höher viskosen, insbesondere hochviskosen Flüssigkeit 1 weist im Unterschied zur Vorrichtung der Fig. 1 Fleizvorrichtungen 8 auf, die am Fluidbehälter 13, an der Fluidleitung 12 und an der Mischkammer 4 angeordnet sind. Anstelle mehrerer Fleizvorrichtungen 8 kann auch nur eine Fleizvorrichtung 8 vorgesehen sein. Mittels der mindestens einen Fleizvorrichtung 8 kann die höher viskose bzw. hochviskose Flüssigkeit 1 erwärmt werden, wodurch die Viskosität der Flüssigkeit 1 herabgesetzt wird. Je geringer die Viskosität der Flüssigkeit 1 ist, desto einfacher kann sie zerstäubt werden. In contrast to the device of FIG. 1, the device according to the invention for atomising a highly viscous, especially highly viscous liquid 1 shown in FIG. 1 has Fleizvorrichtungen 8, which are arranged on the fluid container 13, on the fluid line 12 and on the mixing chamber 4. Instead of several Fleizvorrichtungen 8, only one Fleizvorrichtung 8 may be provided. By means of the at least one Fleizvorrichtung 8, the higher-viscosity or highly viscous liquid 1 can be heated, whereby the viscosity of the liquid 1 is reduced. The lower the viscosity of the liquid 1, the easier it can be atomized.
Der Fig. 4 ist eine weitere bevorzugte Ausführungsform einer erfindungsgemäßen Vorrichtung zum Zerstäuben einer höher viskosen, insbesondere hochviskosen Flüssigkeit 1 zu entnehmen. Hier weist die Vorrichtung zusätzlich einen Ultraschallwandler 9 auf, der im Bereich des Auslasses 11 angeordnet ist und dazu beiträgt, dass die Flüssigkeit 1 noch feiner zerstäubt wird. Der Ultraschallwandler 9 kann beispielsweise ein piezokeramisches Element sein, das elektrische Schwingungen in mechanische umwandelt und diese auf die Flüssigkeit 1 und das Trägermedium 2 überträgt. FIG. 4 shows a further preferred embodiment of a device according to the invention for atomising a highly viscous, in particular highly viscous liquid 1. Here, the device additionally has an ultrasonic transducer 9, which is arranged in the region of the outlet 11 and contributes to the fact that the liquid 1 is atomized even finer. The ultrasonic transducer 9 may be, for example, a piezoceramic element that converts electrical vibrations into mechanical and transmits them to the liquid 1 and the carrier medium 2.
Die in den Figuren 1 bis 4 dargestellten Maßnahmen können jeweils einzeln oder in unterschiedlichen Kombinationen zur Realisierung der Erfindung eingesetzt werden. The measures illustrated in FIGS. 1 to 4 can each be used individually or in different combinations for realizing the invention.

Claims

Ansprüche claims
1. Verfahren zum Zerstäuben einer höher viskosen, insbesondere hochviskosen Flüssigkeit (1) mit Hilfe eines druckbeaufschlagten gasförmigen oder flüssigen Trä germediums (2), das unter Verwendung einer Spritzvorrichtung (3) ausgetragen wird, dadurch gekennzeichnet, dass die zu zerstäubende Flüssigkeit (1) einer Mischkam mer (4) der Spritzvorrichtung (3) zugeführt wird, durch welche das druckbeaufschlagte Trägermedium (2) beim Austragen hindurch geleitet wird, so dass die zu zerstäubende Flüssigkeit (1) von dem Trägermedium (2) mitgerissen wird. 1. A method for atomising a highly viscous, especially highly viscous liquid (1) by means of a pressurized gaseous or liquid Trä carrier medium (2), which is discharged using a spray device (3), characterized in that the liquid to be atomized (1) a Mischkam mer (4) of the spray device (3) is supplied, through which the pressurized carrier medium (2) is passed during discharge, so that the liquid to be atomized (1) from the carrier medium (2) is entrained.
2. Verfahren nach Anspruch 1, 2. The method according to claim 1,
dadurch gekennzeichnet, dass ein Nadelventil (5) mit einer Düse (6) und einem dü senseitig aufgesetzten Adapter (7) als Spritzvorrichtung (3) verwendet wird, wobei der Adapter (7) die Mischkammer (4) ausbildet. characterized in that a needle valve (5) having a nozzle (6) and a suction-side attached adapter (7) is used as a spray device (3), wherein the adapter (7) forms the mixing chamber (4).
3. Verfahren nach Anspruch 1 oder 2, 3. The method according to claim 1 or 2,
dadurch gekennzeichnet, dass das Trägermedium (2) mittels der Spritzvorrich tung (3) in einem gepulsten Verfahren ausgetragen wird. characterized in that the carrier medium (2) by means of the Spritzvorrich device (3) is discharged in a pulsed process.
4. Verfahren nach einem der vorhergehenden Ansprüche, 4. The method according to any one of the preceding claims,
dadurch gekennzeichnet, dass die zu zerstäubende Flüssigkeit (1), bevor sie der Mischkammer (4) zugeführt wird, mit Druck, vorzugsweise mit Hochdruck, beaufschlagt wird. characterized in that the liquid to be atomized (1), before being supplied to the mixing chamber (4), with pressure, preferably at high pressure, is applied.
5. Verfahren nach einem der vorhergehenden Ansprüche, 5. The method according to any one of the preceding claims,
dadurch gekennzeichnet, dass die zu zerstäubende Flüssigkeit (1) mit Hilfe einer Heizvorrichtung (8) erwärmt wird. characterized in that the liquid to be atomized (1) by means of a heating device (8) is heated.
6. Verfahren nach einem der vorhergehenden Ansprüche, 6. The method according to any one of the preceding claims,
dadurch gekennzeichnet, dass mit Hilfe eines Ultraschallwandlers (9) mechanische Schwingungen erzeugt und auf die zu zerstäubende Flüssigkeit (1) und das Trägermedium übertragen werden. characterized in that generated with the aid of an ultrasonic transducer (9) mechanical vibrations and transmitted to the liquid to be atomized (1) and the carrier medium.
7. Vorrichtung zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche, umfassend eine Spritzvorrichtung (3) mit einer Mischkammer (4), die einen Einlass (10) und einen Auslass (11) für ein druckbeaufschlagtes gasförmiges oder flüssiges Trägermedium (2) sowie einen Anschluss an eine Fluidleitung (12) besitzt, mittels welcher der Mischkammer (4) eine in einem Fluidbehälter (13) bevorratete höher viskose, insbesondere hochviskose Flüssigkeit (1) zuführbar ist. 7. A device for carrying out the method according to any one of the preceding claims, comprising a spray device (3) with a mixing chamber (4) having an inlet (10) and an outlet (11) for a pressurized gaseous or liquid carrier medium (2) and a Connection to a fluid line (12) has, by means of which the mixing chamber (4) in a fluid container (13) stored higher viscous, in particular highly viscous liquid (1) can be fed.
8. Vorrichtung nach Anspruch 7, 8. Apparatus according to claim 7,
dadurch gekennzeichnet, dass die Spritzvorrichtung (3) ein Nadelventil (5) mit einer Düse (6) und einen düsenseitig aufgesetzten Adapter (7) zur Ausbildung der Mischkammer (4) umfasst. characterized in that the injection device (3) comprises a needle valve (5) with a nozzle (6) and a nozzle-side mounted adapter (7) for forming the mixing chamber (4).
9. Vorrichtung nach Anspruch 7 oder 8, 9. Apparatus according to claim 7 or 8,
dadurch gekennzeichnet, dass mindestens eine Heizvorrichtung (8) zum Erwärmen der höher viskosen, insbesondere hochviskosen Flüssigkeit (1) vorgesehen ist, wobei vorzugsweise die Heizvorrichtung (8) an der Mischkammer (4), an der Fluidleitung (12) und/oder an dem Fluidbehälter (13) angeordnet ist. characterized in that at least one heating device (8) is provided for heating the higher viscous, especially highly viscous liquid (1), wherein preferably the heating device (8) on the mixing chamber (4), on the fluid line (12) and / or on the Fluid container (13) is arranged.
10. Vorrichtung nach einem der Ansprüche 7 bis 9, 10. Device according to one of claims 7 to 9,
dadurch gekennzeichnet, dass ein Ultraschallwandler (9), insbesondere in Form eines piezokeramischen Elements, zur Erzeugung mechanischer Schwingungen vorgesehen ist, wobei vorzugsweise der Ultraschallwandler (9) im Bereich des Auslasses (11) der Mischkammer (4) angeordnet ist. characterized in that an ultrasonic transducer (9), in particular in the form of a piezoceramic element, is provided for generating mechanical vibrations, wherein preferably the ultrasonic transducer (9) in the region of the outlet (11) of the mixing chamber (4) is arranged.
EP19714133.6A 2018-04-25 2019-03-19 Method and device for atomizing a liquid with a high degree of viscosity, in particular a highly viscous liquid Withdrawn EP3784410A1 (en)

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