EP0241687B1 - Venturi mixing device for making and dispensing mixed beverages, with check valve - Google Patents

Venturi mixing device for making and dispensing mixed beverages, with check valve Download PDF

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Publication number
EP0241687B1
EP0241687B1 EP87102899A EP87102899A EP0241687B1 EP 0241687 B1 EP0241687 B1 EP 0241687B1 EP 87102899 A EP87102899 A EP 87102899A EP 87102899 A EP87102899 A EP 87102899A EP 0241687 B1 EP0241687 B1 EP 0241687B1
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EP
European Patent Office
Prior art keywords
water jet
injector housing
sealing element
mixing chamber
section
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.)
Expired
Application number
EP87102899A
Other languages
German (de)
French (fr)
Other versions
EP0241687A1 (en
Inventor
Uwe Freese
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.)
Douwe Egberts Getraenke-Serv KG
Original Assignee
Dagma Deutsche Automaten und Getraenkemaschinen GmbH and Co KG
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 Dagma Deutsche Automaten und Getraenkemaschinen GmbH and Co KG filed Critical Dagma Deutsche Automaten und Getraenkemaschinen GmbH and Co KG
Priority to AT87102899T priority Critical patent/ATE42086T1/en
Publication of EP0241687A1 publication Critical patent/EP0241687A1/en
Application granted granted Critical
Publication of EP0241687B1 publication Critical patent/EP0241687B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D1/00—Apparatus or devices for dispensing beverages on draught
    • B67D1/0042—Details of specific parts of the dispensers
    • B67D1/0043—Mixing devices for liquids
    • B67D1/0044—Mixing devices for liquids for mixing inside the dispensing nozzle
    • B67D1/0045—Venturi arrangements; Aspirators; Eductors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D1/00—Apparatus or devices for dispensing beverages on draught
    • B67D1/0042—Details of specific parts of the dispensers
    • B67D1/0043—Mixing devices for liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87571—Multiple inlet with single outlet
    • Y10T137/87587—Combining by aspiration
    • Y10T137/87611—Flow control by varying position of a fluid inlet relative to entrainment chamber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87571—Multiple inlet with single outlet
    • Y10T137/87587—Combining by aspiration
    • Y10T137/87643—With condition responsive valve

Definitions

  • the invention relates to a water jet injection device on dispensers for producing and dispensing mixed drinks from fruit syrup or concentrates and water with the features of the preamble of claim 1. It is also for the production of, for. B. chocolate drinks or soups from paste-like concentrates, or for metering other flowable substances with a high solids content.
  • Such a device is known from DE-OS 32 34 957.
  • a check valve and / or a reducing device is generally assigned to the supply line to the mixing chamber .
  • This can be a spring-loaded check valve, a ball valve or a reducing valve.
  • Such an arrangement is relatively complex and presents difficulties because of the risk of clogging and for the cleaning which is always necessary in such systems.
  • a known check valve can also only take on a limited function, namely closing or releasing only the supply line for fruit syrup or concentrate depending on the pressure conditions that occur.
  • the preferably bush-shaped sealing element made of elastically resilient material can be manufactured inexpensively in a simple manner. Special constructive measures in the area of the feed line for the fruit syrup or the concentrate are not necessary.
  • the injector housing also requires no special design in order to be able to use the sealing element. When installed in the injector housing, the sealing element can reliably perform various functions. So the sealing element z. B. reliably seal the connection between the housing and the suction line or the mixing chamber with respect to the area of this housing facing away from the nozzle section of the injector housing. No special additional sealing measures are required.
  • the sealing element in the region where it surrounds the water jet pipe in a sealing manner can also be used as a check valve type effective lip seal can be formed, which reliably seals the suction hole against the mixing chamber in the absence of negative pressure in the mixing chamber, but releases the connection with sufficient injector effect.
  • the mixing chamber and all other parts of the water jet injection device that come into contact with the mixed drink can be reliably rinsed with pressurized water, while at the same time both the supply line for the fruit syrup or the concentrate and also the air suction hole are hermetically sealed against the rinsing process.
  • valve element releases the connection between the mixing chamber and the air intake bore as well as to the supply line for the fruit syrup or the concentrate to a sufficient extent when the injector action occurs.
  • the sealing element can ensure a hermetic seal under all operating conditions between the mixing chamber and the rear region of the injector housing if the ventilation hole is provided in the nozzle section of the injector housing in the form of a radial bore of small cross section instead of in this rear region of the housing.
  • the sealing element also forms the seal for the connection between the injector housing and the suction line for the fruit syrup.
  • the sealing element can have an annular disk-shaped sealing section for this connection point, a middle section which can be inserted into a connection of the injector housing and a truncated cone-shaped lip section which bears sealingly on a frustoconical insert in the inlet opening for the fruit syrup.
  • FIG. 1 shows the water jet injection tion device on an elongated injector housing 1 with different sections.
  • the injector housing On the back of the larger cross section, the injector housing is closed by a cap-shaped cover 2, which is screwably connected to the housing.
  • the cover 2 is connected to a water pressure source via a connecting line 8.
  • Connected to the cover 2 is a part 7 that can be displaced in the piston-like manner in the injector housing, which is sealed by a sliding seal in the form of an O-ring and carries a water jet pipe 9 at its lower end, which is arranged centrally in the injector housing 1 and in a mixing chamber 3 of the injector housing ends.
  • the position of the mouth of the water jet pipe 9 in the mixing chamber can be changed as desired by screwing the cover 2 onto the injector housing, whereby the injector effect can be adjusted.
  • the mixing chamber 3 is followed by a nozzle section 5 with a venturi-like cross section, the narrowest point 6 of which lies at the outlet of the mixing chamber 3.
  • the connecting piece 4 opens laterally into the injector housing 1 for a feed line for the fruit syrup or the concentrate.
  • the feed line is connected to a storage vessel, which can be arranged higher or lower with respect to the mixing chamber 3.
  • a ventilation hole 11 is provided, through which the interior of the injector housing 1 is in free communication with the outside atmosphere.
  • a bush-shaped sealing element 10 made of elastically flexible sealing material is inserted into the injector housing.
  • the sealing element has a rear cylindrical section 12 of larger cross section, which is inserted into the injector housing 1 under pretension and under abutment against a housing shoulder and which cooperates sealingly with the inner surface of the injector housing and also sealingly with the water jet pipe 9 via a lip sealing section 13.
  • the sealing element 10 thus sealingly separates the mixing chamber 3 from the rear region of the injector housing 1 and, via the lip seal 13 acting in the manner of a non-return valve, also the air intake bore 11 from the mixing chamber 3.
  • a tapered cylindrical section 14 of reduced cross-section Connected to the cylindrical section 12 is a tapered cylindrical section 14 of reduced cross-section, which forms an annular distribution chamber 15 with the inner surface of the injector housing 1, which is in free flow connection with the connecting piece 4 for the fruit syrup or the concentrate.
  • This section 14 is followed by a lip-shaped sealing section 16 which widens outward in the shape of a truncated cone, the wider edge of which sealingly adjoins the inner surface of the injector housing 1 and thus sealingly separates the mixing chamber 3 from the annular distributor chamber 15 and the inlet 4 for syrup or concentrate.
  • the arrangement is such that when the injector effect is interrupted by shutting off the water supply, the lip seals 13 and 16 fulfill their sealing function.
  • an overpressure occurs in the mixing chamber 3. This can be the case if a rinsing pressure for cleaning the parts that come into contact with the mixed beverage is generated by a system (not shown here) in the mixing chamber 3 or if the nozzle section 5 is clogged by pulp or the like during the injection process.
  • the lip seals which are designed as non-return valves, bring the mixing chamber 3 into connection with both the annular distributor chamber and with the air intake bore 11. If mixing with air is not desired when producing the mixed beverage, only the air intake bore 11 needs to be closed by the closing valve.
  • the injector housing 20 has a connecting bore 23 between two ring seals 27, which can be connected to a supply line for fruit syrup or concentrate.
  • the bore 23 opens into a distributor ring chamber 30 which can be sealed off from the mixing chamber 24 by the lip-shaped non-return portion of the sealing element 29.
  • the water jet pipe 26 is in sealing contact with a sealing section 31 of the sealing element 29 under all possible operating conditions, so that the rear part of the injector housing 20 is hermetically sealed by the sealing element 29.
  • a plug 21 can be screwed into the rear part, which carries the water jet pipe 26 and a plug connection 22 with a seal for the water connection.
  • the nozzle section 25 has a radial air suction bore 35, which starts from an outer annular groove 37.
  • This ring groove can be used to insert a 0-sealing ring 36 in order to shut off the air intake bore if air entry is not desired during the injection process.
  • the O-ring 36 can be safely stored in a locking groove when not in use.
  • the arrangement is such that the injector housing can be inserted sealingly into a corresponding sleeve-shaped receptacle, sealed by the ring seals 27, and locked by a locking element engaging in the ring groove 28.
  • the functioning of the arrangement is similar to that of the embodiment according to FIG. 1, with the difference that the sealing element 29 constantly seals the rear area of the injector housing 20 and the air is fed into the mixture through the air suction bore 35 located in the nozzle section.
  • a jet pipe 46 is inserted into the elongated section 43 of the injector housing, with the water leech used at the end 44 of the housing device 45 is connected.
  • a diffuser section 47 is attached, which has a prepared breakthrough point 49, at which an air intake opening can be drilled or exposed if necessary.
  • the diffuser opens into a dispensing section 48 for the beverage.
  • the housing has a relatively wide lateral extension 51, which is used for connection to the suction line or the like. In the present case, the suction line for the fruit syrup is directly replaced by the lower outlet 41 of a syrup container.
  • the middle section 53b of a sealing element 53 is inserted into the extension 51.
  • An insert body is held in the middle section 53b of the sealing element 53 with the aid of a collar 54 which has two or more than two partially annular passage openings 55 for the syrup.
  • the insert has a displacement body 52, on the other side of the collar a truncated cone-shaped end part 56, against which a flat, inclined, frustoconical lip section 57 of the sealing element 53 normally rests in a sealing manner.
  • 51 a the connection part of the approach 51 and 42 the connection part of the syrup container is designated.
  • 50 represents an element which can be actuated from the outside and which is provided for cleaning purposes.
  • the device works with increased dynamic water pressure between about 3.5 and 6 bar when entering the water jet pipe and thus with a high accuracy, which is practically independent of changes in viscosity. It is not necessary to adjust the mixture strength using a reducing device between the storage container and the injector housing.
  • the lip 57 (FIG. 3) has only a relatively low contact force and thus practically no reducing effect.
  • the jet pipe can be longitudinally adjustable, the water pressure (before entering the water jet pipe) can be varied, or the effect of the air admixture can be changed by the position of the air inlet opening on the injector housing or by adjusting the air inflow cross-section. None of these setting options requires parts that come into contact with the concentrate or the like or with the mixture.

Landscapes

  • Devices For Dispensing Beverages (AREA)
  • Accessories For Mixers (AREA)

Abstract

A water jet injection device for use with mixed beverage dispensing machines is provided, wherein a bushing-type sealing element which fulfills several functions is placed in the injector housing. In particular, the sealing element sealingly separates the mixing chamber from the rearward section of the injector housing in a reliable manner and further acts as a nonreturn valve hermetically sealing the mixing chamber against the supply conduit for fruit syrup or concentrate when the injector in the mixing chamber is inoperative and, at the same time, the sealing element provides a seal when an intake conduit or the like is connected with the lateral intake opening of the injector housing.

Description

Die Erfindung betrifft eine Wasserstrahl-Injektionsvorrichtung an Dispensern zum Herstellen und Abgeben von Mischgetränken aus Fruchtsirup oder Konzentraten und Wasser mit den Merkmalen des Oberbegriffs des Anspruchs 1. Sie ist auch zur Herstellung von z. B. Schokoladegetränken oder Suppen aus pastenförmigen Konzentraten geeignet, oder zur Zudosierung anderer fliessfähiger Stoffe mit hohem Feststoffgehalt.The invention relates to a water jet injection device on dispensers for producing and dispensing mixed drinks from fruit syrup or concentrates and water with the features of the preamble of claim 1. It is also for the production of, for. B. chocolate drinks or soups from paste-like concentrates, or for metering other flowable substances with a high solids content.

Eine solche Vorrichtung ist aus der DE-OS 32 34 957 bekannt.Such a device is known from DE-OS 32 34 957.

Um den Vorratsbehälter für den Fruchtsirup, das Konzentrat oder dgl. der Höhe nach unabhängig von der Höhenlage der Mischkammer anordnen zu können und eine sichere Funktionsweise und Einstellmöglichkeit zu gewährleisten, ist der Zuführungsleitung zu der Mischkammer in aller Regel ein Rückschlagventil und/oder eine Reduziervorrichtung zugeordnet. Hierbei kann es sich um ein federbelastetes Rückschlagventil, um ein Kugelventil oder ein Reduzierventil handeln. Eine solche Anordnung ist relativ aufwendig und bereitet Schwierigkeiten wegen Verstopfungsgefahr und für das bei solchen Systemen stets notwendige Reinigen. Trotz des relativ hohen Herstellungsaufwandes kann ein solches bekanntes Rückschlagventil ausserdem nur eine begrenzte Funktion übernehmen, nämlich allein die Zuleitung für Fruchtsirup oder Konzentrat in Abhängigkeit von den auftretenden Druckverhältnissen verschliessen bzw. freigeben.In order to be able to arrange the storage container for the fruit syrup, the concentrate or the like regardless of the height of the mixing chamber and to ensure safe functioning and setting options, a check valve and / or a reducing device is generally assigned to the supply line to the mixing chamber . This can be a spring-loaded check valve, a ball valve or a reducing valve. Such an arrangement is relatively complex and presents difficulties because of the risk of clogging and for the cleaning which is always necessary in such systems. In spite of the relatively high manufacturing expenditure, such a known check valve can also only take on a limited function, namely closing or releasing only the supply line for fruit syrup or concentrate depending on the pressure conditions that occur.

Es ist Aufgabe der Erfindung, eine solche Wasserstrahl-Injektionsvorrichtung mit den Merkmalen des Oberbegriffes weiterzubilden, um die aufgezeigten Nachteile zu vermeiden, die Herstellung zu vereinfachen, den Funktionsbereich des Rückschlagventils zu erweitern und schliesslich die Verhältnisse beim Spülen und Reinigen des Systems wesentlich zu vereinfachen und zu verbessern.It is an object of the invention to further develop such a water jet injection device with the features of the preamble in order to avoid the disadvantages indicated, to simplify the manufacture, to expand the functional range of the check valve and finally to simplify the conditions for flushing and cleaning the system and to improve.

Diese Aufgabe wird durch die Massnahmen des Anspruchs 1 gelöst.This object is achieved by the measures of claim 1.

Das vorzugsweise buchsenförmig ausgebildete Dichtungselement aus elastisch nachgiebigem Werkstoff lässt sich auf einfache Weise preiswert herstellen. Besondere konstruktive Massnahmen im Bereich der Zulaufleitung für den Fruchtsirup oder das Konzentrat sind nicht notwendig. Auch das Injektorgehäuse bedarf keiner besonderen Gestaltung, um das Dichtungselement einsetzen zu können. Das Dichtungselement kann in seiner Einbaulage im Injektorgehäuse verschiedene Funktionen zuverlässig erfüllen. So vermag das Dichtungselement z. B. die Verbindung zwischen Gehäuse und Ansaugleitung oder die Mischkammer gegenüber dem vom Düsenabschnitt des Injektorgehäuses abgewandten Bereich dieses Gehäuses zuverlässig abzudichten. Es sind keine besonderen zusätzlichen Dichtungsmassnahmen erforderlich. Wenn die für die Herstellung bestimmter Getränke erwünschte Bohrung zum Ansaugen von Luft in die Mischkammer auf der von dem Düsenabschnitt abgewandten Seite des Dichtungselementes im Injektorgehäuse vorgesehen ist, kann das Dichtungselement in dem Bereich, wo es das Wasserstrahlrohr abdichtend umgibt ebenfalls als eine nach Art eines Rückschlagventils wirksame Lippendichtung ausgebildet sein, welche bei fehlendem Unterdruck in der Mischkammer die Ansaugbohrung zuverlässig gegenüber der Mischkammer abdichtet, die Verbindung jedoch bei ausreichender Injektorwirkung freigibt. Dadurch lassen sich die Mischkammer und alle übrigen mit dem Mischgetränk in Kontakt tretenden Teile der Wasserstrahl-Injektionsvorrichtung zuverlässig mit Druckwasserspülen, während gleichzeitig sowohl die Zuleitung für den Fruchtsirup oder das Konzentrat und zusätzlich auch die Luftansaugbohrung gegen den Spülvorgang hermetisch abgedichtet sind. Der Spülvorgang wird damit wesentlich zuverlässiger und einfacher, so dass er bei Bedarf auch als abschliessende Phase bei jedem einzelnen Dosiervorgang ausgelöst werden kann. Das Ventilelement gibt auf der anderen Seite bei auftretender Injektorwirkung die Verbindung zwischen der Mischkammer und der Luftansaugbohrung ebenso wie zu der Zuleitung für den Fruchtsirup oder das Konzentrat im ausreichenden Masse frei.The preferably bush-shaped sealing element made of elastically resilient material can be manufactured inexpensively in a simple manner. Special constructive measures in the area of the feed line for the fruit syrup or the concentrate are not necessary. The injector housing also requires no special design in order to be able to use the sealing element. When installed in the injector housing, the sealing element can reliably perform various functions. So the sealing element z. B. reliably seal the connection between the housing and the suction line or the mixing chamber with respect to the area of this housing facing away from the nozzle section of the injector housing. No special additional sealing measures are required. If the bore required for the production of certain beverages for sucking air into the mixing chamber is provided on the side of the sealing element facing away from the nozzle section in the injector housing, the sealing element in the region where it surrounds the water jet pipe in a sealing manner can also be used as a check valve type effective lip seal can be formed, which reliably seals the suction hole against the mixing chamber in the absence of negative pressure in the mixing chamber, but releases the connection with sufficient injector effect. As a result, the mixing chamber and all other parts of the water jet injection device that come into contact with the mixed drink can be reliably rinsed with pressurized water, while at the same time both the supply line for the fruit syrup or the concentrate and also the air suction hole are hermetically sealed against the rinsing process. The rinsing process is thus much more reliable and easier, so that it can also be triggered as a final phase for each individual dosing process if required. On the other hand, the valve element releases the connection between the mixing chamber and the air intake bore as well as to the supply line for the fruit syrup or the concentrate to a sufficient extent when the injector action occurs.

Treten Druckänderungen während des Injektorbetriebes z. B. durch Verstopfen des Düsenabschnittes durch grobe Fruchtfleischteile oder dgl. auf, werden Luftzuführungsbohrung und Zuleitung schlagartig und zuverlässig durch die Rückschlagwirkung des Dichtungselementes abgesperrt. Eine Verunreinigung der Luftansaugbohrung durch Sirup oder Konzentrat oder Mischgetränk wird so zuverlässig ausgeschlossen. Das Dichtungselementverhindertzugleich durch seine Rückschlagwirkung ein Leertropfen des Injektorgehäuses nach Beendigung des Injektorvorganges.Occurrence of pressure changes during injector operation z. B. by clogging the nozzle portion by coarse pulp or the like., Air supply bore and supply line are suddenly and reliably shut off by the recoil effect of the sealing element. This reliably prevents contamination of the air intake hole by syrup or concentrate or mixed drink. The sealing element also prevents the injector housing from dripping empty after the injection process has ended due to its kickback effect.

Das Dichtungselement kann eine hermetische Abdichtung unter allen Betriebszuständen zwischen Mischkammer und dem rückwärtigen Bereich des Injektorgehäuses gewährleisten, wenn die Belüftungsbohrung statt in diesem rückwärtigen Bereich des Gehäuses in dem Düsenabschnitt des Injektorgehäuses in Form einer Radialbohrung von geringem Querschnitt vorgesehen ist.The sealing element can ensure a hermetic seal under all operating conditions between the mixing chamber and the rear region of the injector housing if the ventilation hole is provided in the nozzle section of the injector housing in the form of a radial bore of small cross section instead of in this rear region of the housing.

Bei einem weiteren Ausführungsbeispiel bildet das Dichtungselement zugleich die Dichtung für die Verbindung zwischen Injektorgehäuse und Ansaugleitung für den Fruchtsirup. Hierzu kann das Dichtelement einen Ringscheibenförmigen Dichtungsabschnitt für diese Verbindungsstelle, einen in einen Anschluss des Injektorgehäuses einsetzbaren Mittelabschnitt und einen kegelstumpfförmigen Lippenabschnitt aufweisen, der an einem kegelstumpfförmigen Einsatzteil in der Eintrittsöffnung für den Fruchtsirup abdichtend anliegt.In a further embodiment, the sealing element also forms the seal for the connection between the injector housing and the suction line for the fruit syrup. For this purpose, the sealing element can have an annular disk-shaped sealing section for this connection point, a middle section which can be inserted into a connection of the injector housing and a truncated cone-shaped lip section which bears sealingly on a frustoconical insert in the inlet opening for the fruit syrup.

Die Erfindung wird nachfolgend anhand schematischer Zeichnungen an mehreren Ausführungsbeispielen näher erläutert. Diese sind in den Figuren jeweils im senkrechten Längsschnitt dargestellt.The invention is explained in more detail below with the aid of schematic drawings using several exemplary embodiments. These are each shown in the figures in a vertical longitudinal section.

Gemäss Fig. 1 weist die Wasserstrahl-Injektionsvorrichtung ein langgestrecktes Injektorgehäuse 1 mit unterschiedlichen Abschnitten auf. Auf der Rückseite vom grösseren Querschnitt ist das Injektorgehäuse durch einen kappenförmigen Deckel 2 verschlossen, der mit dem Gehäuse schraubbar verbunden ist. Der Deckel 2 ist über eine Anschlussleitung 8 mit einer Wasserdruckquelle verbunden. Mit dem Deckel 2 ist ein in dem Injektorgehäuse kolbenartig verschiebbarer Teil 7 verbunden, der über eine Schiebedichtung in Form eines O-Ringes abgedichtet ist und an seinem unteren Ende ein Wasserstrahlrohr 9 trägt, das zentrisch in dem Injektorgehäuse 1 angeordnet ist und in einer Mischkammer 3 des Injektorgehäuses endet. Die Lage der Mündung des Wasserstrahlrohres 9 in der Mischkammer kann durch Verschrauben des Deckels 2 auf dem Injektorgehäuse nach Wunsch verändert werden, womit die Injektorwirkung eingestellt werden kann. Nach unten in Fig. 1 schliesst sich an die Mischkammer 3 ein Düsenabschnitt 5 mit venturiartigem Querschnitt an, dessen engste Stelle 6 am Austritt der Mischkammer 3 liegt. Im Abstand vor dem Düsenabschnitt 5 mündet seitlich in das Injektorgehäuse 1 der Anschlussstutzen 4 für eine Zuleitung für den Fruchtsirup oder das Konzentrat. Die Zuleitung ist mit einem Vorratsgefäss verbunden, das höher oder tiefer in bezug auf die Mischkammer 3 angeordnet sein kann. Im Abstand oberhalb des Anschlussstutzens 4 ist eine Belüftungsbohrung 11 vorgesehen, durch die das Innere des Injektorgehäuses 1 mit der Aussenatmosphäre in freier Verbindung steht.1 shows the water jet injection tion device on an elongated injector housing 1 with different sections. On the back of the larger cross section, the injector housing is closed by a cap-shaped cover 2, which is screwably connected to the housing. The cover 2 is connected to a water pressure source via a connecting line 8. Connected to the cover 2 is a part 7 that can be displaced in the piston-like manner in the injector housing, which is sealed by a sliding seal in the form of an O-ring and carries a water jet pipe 9 at its lower end, which is arranged centrally in the injector housing 1 and in a mixing chamber 3 of the injector housing ends. The position of the mouth of the water jet pipe 9 in the mixing chamber can be changed as desired by screwing the cover 2 onto the injector housing, whereby the injector effect can be adjusted. At the bottom in FIG. 1, the mixing chamber 3 is followed by a nozzle section 5 with a venturi-like cross section, the narrowest point 6 of which lies at the outlet of the mixing chamber 3. At a distance from the nozzle section 5, the connecting piece 4 opens laterally into the injector housing 1 for a feed line for the fruit syrup or the concentrate. The feed line is connected to a storage vessel, which can be arranged higher or lower with respect to the mixing chamber 3. At a distance above the connecting piece 4, a ventilation hole 11 is provided, through which the interior of the injector housing 1 is in free communication with the outside atmosphere.

In das Injektorgehäuse ist ein buchsenförmiges Dichtungselement 10 aus elastisch nachgiebigem Dichtwerkstoff eingesetzt. Das Dichtungselement weist einen rückwärtigen zylindrischen Abschnitt 12 von grösserem Querschnitt auf, der unter Vorspannung und unter Anlage an eine Gehäuseschulter in das Injektorgehäuse 1 eingesetzt ist und abdichtend mit der Innenfläche des Injektorgehäuses und über einen Lippendichtungsabschnitt 13 abdichtend auch mit dem Wasserstrahlrohr 9 zusammenwirkt. Das Dichtungselement 10 trennt somit abdichtend die Mischkammer 3 vom rückwärtigen Bereich des Injektorgehäuses 1 und über die nach Art eines Rückschlagventils wirkende Lippendichtung 13 auch die Luftansaugbohrung 11 gegenüber der Mischkammer 3 ab. An dem zylindrischen Abschnitt 12 schliesst sich ein verjüngter zylindrischer Abschnitt 14 von verringertem Querschnitt an, der mit der Innenfläche des Injektorgehäuses 1 eine ringförmige Verteilerkammer 15 bildet, die in freier Strömungsverbindung mit dem Anschlussstutzen 4 für den Fruchtsirup oder das Konzentrat steht. An diesen Abschnitt 14 schliesst sich ein lippenförmiger, sich nach aussen kegelstumpfförmig erweiternder Dichtungsabschnitt 16 an, dessen weiter Rand abdichtend an der Innenfläche des Injektorgehäuses 1 anschliesst und so die Mischkammer 3 abdichtend von der ringförmigen Verteilerkammer 15 und dem Zulauf 4 für Sirup oder Konzentrat trennt.A bush-shaped sealing element 10 made of elastically flexible sealing material is inserted into the injector housing. The sealing element has a rear cylindrical section 12 of larger cross section, which is inserted into the injector housing 1 under pretension and under abutment against a housing shoulder and which cooperates sealingly with the inner surface of the injector housing and also sealingly with the water jet pipe 9 via a lip sealing section 13. The sealing element 10 thus sealingly separates the mixing chamber 3 from the rear region of the injector housing 1 and, via the lip seal 13 acting in the manner of a non-return valve, also the air intake bore 11 from the mixing chamber 3. Connected to the cylindrical section 12 is a tapered cylindrical section 14 of reduced cross-section, which forms an annular distribution chamber 15 with the inner surface of the injector housing 1, which is in free flow connection with the connecting piece 4 for the fruit syrup or the concentrate. This section 14 is followed by a lip-shaped sealing section 16 which widens outward in the shape of a truncated cone, the wider edge of which sealingly adjoins the inner surface of the injector housing 1 and thus sealingly separates the mixing chamber 3 from the annular distributor chamber 15 and the inlet 4 for syrup or concentrate.

Die Anordnung ist so getroffen, dass dann, wenn die Injektorwirkung durch Absperren des Wasserzulaufes unterbrochen ist, die Lippendichtungen 13 bzw. 16 ihre Dichtfunktion erfüllen. Das gleiche gilt, wenn in der Mischkammer 3 ein Überdruck auftritt. Dies kann der Fall sein, wenn durch ein hier nicht näher dargestelltes System in der Mischkammer 3 ein Spüldruck zum Reinigen der mit dem Mischgetränk in Kontakt tretenden Teile erzeugt wird oder wenn während des Injektorvorganges der Düsenabschnitt 5 durch Fruchtfleisch oder dgl. verstopft ist. Wird durch den in die Mischkammer 3 eintretenden Wasserstrahl jedoch die Injektorwirkung und damit in der Mischkammer 3 ein Unterdruck erzeugt wird durch die Lippendichtungen, die als Rückschlagventile ausgebildet sind, die Mischkammer 3 sowohl mit der ringförmigen Verteilerkammer wie auch mit der Luftansaugbohrung 11 in Verbindung gebracht. Wird bei Herstellung des Mischgetränkes eine Vermischung mit Luft nicht gewünscht, braucht durch Schliessventil lediglich die Luftansaugbohrung 11 verschlossen zu werden.The arrangement is such that when the injector effect is interrupted by shutting off the water supply, the lip seals 13 and 16 fulfill their sealing function. The same applies if an overpressure occurs in the mixing chamber 3. This can be the case if a rinsing pressure for cleaning the parts that come into contact with the mixed beverage is generated by a system (not shown here) in the mixing chamber 3 or if the nozzle section 5 is clogged by pulp or the like during the injection process. However, if the water jet entering the mixing chamber 3 creates the injector effect and thus a negative pressure in the mixing chamber 3, the lip seals, which are designed as non-return valves, bring the mixing chamber 3 into connection with both the annular distributor chamber and with the air intake bore 11. If mixing with air is not desired when producing the mixed beverage, only the air intake bore 11 needs to be closed by the closing valve.

Bei der Ausführung nach Fig. 2 weist das Injektorgehäuse 20 eine zwischen zwei Ringdichtungen 27 liegende Verbindungsbohrung 23 auf, die mit einer Zuleitung für Fruchtsirup oder Konzentrat in Verbindung gebracht werden kann. Die Bohrung 23 mündet in eine Verteilerringkammer 30, die gegenüber der Mischkammer 24 durch den lippenförmigen Rückschlagabschnitt des Dichtungselementes 29 abgedichtet sein kann. Das Wasserstrahlrohr 26 ist mit einem Dichtabschnitt 31 des Dichtelementes 29 unter allen möglichen auftretenden Betriebszuständen in abdichtendem Kontakt, so dass der rückwärtige Teil des Injektorgehäuses 20 durch das Dichtelement 29 hermetisch abgedichtet ist. In den rückwärtigen Teil ist ein Stopfen 21 schraubbar, der das Wasserstrahlrohr 26 und einen Steckanschluss 22 mit Dichtung für den Wasseranschluss trägt. Der Düsenabschnitt 25 weist im Abstand von der Mischkammer 24 eine radiale Luftansaugbohrung 35 auf, die von einer äusseren Ringnut 37 ausgeht.In the embodiment according to FIG. 2, the injector housing 20 has a connecting bore 23 between two ring seals 27, which can be connected to a supply line for fruit syrup or concentrate. The bore 23 opens into a distributor ring chamber 30 which can be sealed off from the mixing chamber 24 by the lip-shaped non-return portion of the sealing element 29. The water jet pipe 26 is in sealing contact with a sealing section 31 of the sealing element 29 under all possible operating conditions, so that the rear part of the injector housing 20 is hermetically sealed by the sealing element 29. A plug 21 can be screwed into the rear part, which carries the water jet pipe 26 and a plug connection 22 with a seal for the water connection. At a distance from the mixing chamber 24, the nozzle section 25 has a radial air suction bore 35, which starts from an outer annular groove 37.

h diese Ringnut kann ein 0- Dichtring 36 eingelegt werden, um die Luftansaugbohrung abzusperren, wenn Lufteintritt während des Injektorvorganges nicht erwünscht ist. Der O-Ring 36 kann in einer Rastnut bei Nichtgebrauch sicher aufbewahrt werden.h This ring groove can be used to insert a 0-sealing ring 36 in order to shut off the air intake bore if air entry is not desired during the injection process. The O-ring 36 can be safely stored in a locking groove when not in use.

Die Anordnung ist so getroffen, dass das Injektorgehäuse abdichtend in eine entsprechende hülsenförmige Aufnahme unter Abdichtung durch die Ringdichtungen 27 eingeschoben und durch ein in die Ringnut 28 eingreifendes Sperrelement verriegelt werden kann.The arrangement is such that the injector housing can be inserted sealingly into a corresponding sleeve-shaped receptacle, sealed by the ring seals 27, and locked by a locking element engaging in the ring groove 28.

Die Funktionsweise der Anordnung ist ähnlich wie die der Ausführung nach Fig. 1, mit dem Unterschied, dass das Dichtelement 29 den rückwärtigen Bereich des Injektorgehäuses 20 ständig abdichtet und die Luftzufuhr in das Gemisch durch die im Düsenabschnitt liegende Luftansaugbohrung 35 erfolgt.The functioning of the arrangement is similar to that of the embodiment according to FIG. 1, with the difference that the sealing element 29 constantly seals the rear area of the injector housing 20 and the air is fed into the mixture through the air suction bore 35 located in the nozzle section.

Bei dem Ausführungsbeispiel nach Fig. 3 ist in den langgestreckten Abschnitt 43 des Injektorgehäuses ein Strahlrohr 46 eingesetzt, das mit der am Ende 44 des Gehäuses eingesetzten Wasserleitung 45 in Verbindung steht. Am anderen Ende des langgestreckten Gehäuses ist ein Diffuserabschnitt 47 angesetzt, der eine vorbereitete Durchbruchstelle 49 aufweist, an der bei Bedarf eine Luftansaugöffnung gebohrt oder freigelegt werden kann. Der Diffuser mündet in einen Abgabeabschnitt 48 für das Getränk. Das Gehäuse weist einen relativ weiten seitlichen Ansatz 51 auf, der zum Anschluss an die Ansaugleitung oder dgl. dient. Im vorliegenden Fall ist die Ansaugleitung für den Fruchtsirup direkt ersetzt durch den unteren Auslauf 41 eines Sirupbehälters. In den Ansatz 51 ist der Mittelabschnitt 53b eines Dichtelementes 53 eingesetzt..In the exemplary embodiment according to FIG. 3, a jet pipe 46 is inserted into the elongated section 43 of the injector housing, with the water leech used at the end 44 of the housing device 45 is connected. At the other end of the elongated housing, a diffuser section 47 is attached, which has a prepared breakthrough point 49, at which an air intake opening can be drilled or exposed if necessary. The diffuser opens into a dispensing section 48 for the beverage. The housing has a relatively wide lateral extension 51, which is used for connection to the suction line or the like. In the present case, the suction line for the fruit syrup is directly replaced by the lower outlet 41 of a syrup container. The middle section 53b of a sealing element 53 is inserted into the extension 51.

Dieser weist einen ringscheibenförmigen Dichtungsabschnitt 53a auf, der beim Zusammenbau von Behälter 41 und Injektorgehäuse die Abdichtung zwischen den beiden Teilen übernimmt. In den Mittelabschnitt 53b des Dichtelementes 53 ist ein Einsatzkörper mit Hilfe eines Kragens 54gehalten, der zwei oder mehr als zwei teilringförmige Durchtrittsöffnungen 55 für den Sirup aufweist. Zur Seite des Sirupbehälters hin weist der Einsatz einen Verdrängungskörper 52 auf, auf der anderen Seite des Kragens einen kegelstumpfförmigen Abschlussteil 56, an den sich ein flacher, geneigter, kegelstumpfförmiger Lippenabschnitt 57 des Dichtelementes 53 normalerweise abdichtend anlegt. Mit 51 a ist der Anschlussteil des Ansatzes 51 und mit 42 der Anschlussteil des Sirupbehälters bezeichnet. 50 stellt ein von aussen betätigbares Element dar, das für Reinigungszwecke vorgesehen ist.This has an annular disk-shaped sealing section 53a, which takes over the sealing between the two parts when the container 41 and injector housing are assembled. An insert body is held in the middle section 53b of the sealing element 53 with the aid of a collar 54 which has two or more than two partially annular passage openings 55 for the syrup. To the side of the syrup container, the insert has a displacement body 52, on the other side of the collar a truncated cone-shaped end part 56, against which a flat, inclined, frustoconical lip section 57 of the sealing element 53 normally rests in a sealing manner. With 51 a the connection part of the approach 51 and 42 the connection part of the syrup container is designated. 50 represents an element which can be actuated from the outside and which is provided for cleaning purposes.

Die Vorrichtung arbeitet mit erhöhtem dynamischen Wasserdruck zwischen etwa 3,5 und 6 bar bei Eintritt in das Wasserstrahlrohr und so mit einer hohen, von Änderungen der Viskosität praktisch unabhängigen Genauigkeit. Eine Einstellung der Gemischstärke durch eine Reduziervorrichtung zwischen Vorratsbehälter und Injektorgehäuse ist entbehrlich. Die Lippe 57 (Fig. 3) weist nur eine relativ geringe Anlagekraft und so praktisch keine Reduzierwirkung auf. Zur Regulierung der Gemischstärke kann das Strahlrohr längsverstellbar sein, kann der Wasservordruck (vor Eintritt in das Wasserstrahlrohr) variiert werden, oder kann durch Lage der Lufteintrittsöffnung am Injektorgehäuse bzw. durch Einstellung des Luftzuströmquerschnittes die Wirkung der Luftbeimischung verändert werden. Keine dieser Einstellmöglichkeiten benötigt Teile, die mit dem Konzentrat oder dgl. bzw. mit dem Gemisch in Berührung gelangen.The device works with increased dynamic water pressure between about 3.5 and 6 bar when entering the water jet pipe and thus with a high accuracy, which is practically independent of changes in viscosity. It is not necessary to adjust the mixture strength using a reducing device between the storage container and the injector housing. The lip 57 (FIG. 3) has only a relatively low contact force and thus practically no reducing effect. To regulate the mixture strength, the jet pipe can be longitudinally adjustable, the water pressure (before entering the water jet pipe) can be varied, or the effect of the air admixture can be changed by the position of the air inlet opening on the injector housing or by adjusting the air inflow cross-section. None of these setting options requires parts that come into contact with the concentrate or the like or with the mixture.

Claims (12)

1. Water jet injection device on dispensers for making and dispensing mixtures, in particular mixed drinks made of fruit syrup or concentrates and water, with an elongate injector housing (1, 20, 51) in whose interior there is constructed a mixing chamber (3, 24) into which there projects, from one end of the injector housing, a water jet tube (9, 26, 46) which is connectable to a water pressure source, and from which a nozzle section (5, 25) extends towards the outlet for the mixture at the other end of the injector housing, said mixing chamber having at least one lateral intake opening (4, 23, 55) for the connection of a suction pipe for the fruit syrup, the concentrate, or the like, with which a non-return valve installation is associated; characterised in that in the injector housing (1, 20, 51 ) there is arranged a sealing element (10, 29, 53) which is made of a resilient material and which has a resiliently yielding edge section (16, 57) which, when no injector action occurs, sealingly covers the lateral intake opening (4, 23, 55) from the direction of the mixing chamber (3, 24), in the manner of a non-return valve, and which rises from the intake opening (4, 23, 55) when subjected to the injector action.
2. Water jet injection device according to claim 1, characterised in that the sealing element (10, 29) is inserted in the form of a bush-like sleeve into the injector housing (1, 20), and seals the mixing chamber (3,24) in the housing, on the side facing away from the nozzle section (5, 25).
3. Water jet injection device according to claim 2, characterised in that the sealing element (10, 29) co-operates with the axially adjustable water jet tube (9,26) by means of a sliding seal (13,31).
4. Water jet injection device according to claim 3, characterised in that an air suction bore (11) is provided in the injector housing (1), on the rear side of the sealing element (10), and in that the sealing element (10) has a further lip-shaped sealing section (13) which operates in the manner of a non-return valve, between the mixing chamber (3) and the air suction bore (11).
5. Water jet injection device according to any one of the claims 1 to 4, characterised in that the sealing element (10, 29) has a rearward cylindrical section (12) which is inserted under pre-tension into the injector housing (1, 20) and closes the mixing chamber (3, 24) towards the rear, and has a sealed throughpassage (13, 31 ) for the water jet tube (9, 26); in that adjacent thereto there is a hollow cylindrical section (14) of reduced diameter, which, with the inner surface of the injector housing (1, 20) forms a distributor ring chamber (15,30) into which opens the supply pipe for the fruit syrup or the concentrate, and which surrounds the water jet tube (9, 26) spaced at a distance apart from it; and in that on said section (14) there extends a collar (16) which widens in frustoconical shape in the direction towards the nozzle section (5, 25) and which is in the form of a resilient sealing lip whose wide section lies against the inner surface of the mixing chamber.
6. Water jet injection device according to claim 3, characterised in that the sealing element (29) seals the injector housing (20) on the side of the mixing chamber (24) which faces away from the nozzle section (25) under all operating conditions, not only on the inner wall of the injector housing (20) but also on the water jet tube (26); and in that an air suction bore (35) is provided on the other side of the mixing chamber (24), as radial bore in the nozzle section (25).
7. Water jet injection device according to claim 6, characterised in that the radial bore (35) starts out from the base of an external peripheral groove (37) of the injector housing, and is closable by means of an O-ring (36) which is insertable into the groove.
8. Water jet injection device according to claim 7, characterised in that spaced apart from the peripheral groove (37) there is provided an engagement groove for the position of non-usage oftheO-ring (36), and this ring, in each of its two positions, serves simultaneously as direction of rotation for a load balancing device, for the mixed drink, which is pivotable on the nozzle section (25).
9. Water jet injection device according to claim 1, characterised in that the sealing element (53) is constructed for simultaneously sealing the connection between injector housing (51 ) and the suction pipe (41).
10. Water jet injection device according to claim 9, characterised in that the sealing element (53) has a circular disc shaped sealing section (53a) for sealing the connecting place, and has a middle section (53b) which is insertable into a connection (51 a) of the injector housing (51), and has a frustoconical-shaped lip section (57) which lies sealingly against a frustoconical-shaped insert part (56) in the intake opening.
11. Water jet injection device according to claim 10, characterised in that the insert part (56) is held in the middle section (53b) of the sealing element (53) by a collar (54) which has throughpassage openings (55).
12. Water jet injection device according to any one of the claims 9 to 11, characterised in that the sealing element (53) is the sole device with reducing action in the connection between injector housing and supply container.
EP87102899A 1986-03-07 1987-03-02 Venturi mixing device for making and dispensing mixed beverages, with check valve Expired EP0241687B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102899T ATE42086T1 (en) 1986-03-07 1987-03-02 WATERJET INJECTION DEVICE WITH NON-RETURN VALVE FOR MAKING AND DISPENSING MIXED BEVERAGES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863607606 DE3607606A1 (en) 1986-03-07 1986-03-07 WATERJET INJECTION DEVICE ON DISPENSERS FOR PRODUCING AND DISPENSING MIXED BEVERAGES FROM FRUIT SYRUP OR CONCENTRATE AND WATER
DE3607606 1986-03-07

Publications (2)

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EP0241687A1 EP0241687A1 (en) 1987-10-21
EP0241687B1 true EP0241687B1 (en) 1989-04-12

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EP87102899A Expired EP0241687B1 (en) 1986-03-07 1987-03-02 Venturi mixing device for making and dispensing mixed beverages, with check valve

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US (1) US4817825A (en)
EP (1) EP0241687B1 (en)
AT (1) ATE42086T1 (en)
CA (1) CA1299536C (en)
DE (2) DE3607606A1 (en)

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Also Published As

Publication number Publication date
DE3607606A1 (en) 1987-09-24
EP0241687A1 (en) 1987-10-21
ATE42086T1 (en) 1989-04-15
CA1299536C (en) 1992-04-28
DE3760100D1 (en) 1989-05-18
US4817825A (en) 1989-04-04

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