EP0471343B1 - Storage vessel with an electric-driven circulating pump - Google Patents

Storage vessel with an electric-driven circulating pump Download PDF

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Publication number
EP0471343B1
EP0471343B1 EP91113583A EP91113583A EP0471343B1 EP 0471343 B1 EP0471343 B1 EP 0471343B1 EP 91113583 A EP91113583 A EP 91113583A EP 91113583 A EP91113583 A EP 91113583A EP 0471343 B1 EP0471343 B1 EP 0471343B1
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EP
European Patent Office
Prior art keywords
stock container
circulating pump
drive motor
motor housing
wall
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 - Lifetime
Application number
EP91113583A
Other languages
German (de)
French (fr)
Other versions
EP0471343A3 (en
EP0471343A2 (en
Inventor
Anton Dipl.-Ing. Deininger (Fh)
Dipl.-Ing. Färber Karlheinz (FH)
Heinz-Werner Dipl.-Ing. Giefer
Galler Dipl.-Ing. Benker (Fh)
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.)
BOSCH-SIEMENS HAUSGERAETE GMBH
Coca Cola Co
Original Assignee
Coca Cola Co
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Filing date
Publication date
Application filed by Coca Cola Co filed Critical Coca Cola Co
Publication of EP0471343A2 publication Critical patent/EP0471343A2/en
Publication of EP0471343A3 publication Critical patent/EP0471343A3/en
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Publication of EP0471343B1 publication Critical patent/EP0471343B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/06—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits forming part of, or being attached to, the tank containing the body of fluid
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F13/00—Coin-freed apparatus for controlling dispensing or fluids, semiliquids or granular material from reservoirs
    • G07F13/06—Coin-freed apparatus for controlling dispensing or fluids, semiliquids or granular material from reservoirs with selective dispensing of different fluids or materials or mixtures thereof
    • G07F13/065—Coin-freed apparatus for controlling dispensing or fluids, semiliquids or granular material from reservoirs with selective dispensing of different fluids or materials or mixtures thereof for drink preparation
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/07—Carbonators

Definitions

  • the present invention relates to a storage container, in particular for vending machines for storing, gassing and cooling water with an electrically operated circulation pump, and an outlet opening located in the bottom region of the storage container for the necessary discharge of the water.
  • Such an arrangement is used in connection with vending machines to store the cooled water enriched with CO2 gas under pressure in order to mix it portioned with other concentrated beverage concentrates as needed to form a usable beverage.
  • an appropriate unit To fumigate and circulate the water, an appropriate unit must be arranged and fastened in the storage container and corresponding fastening means must accordingly be provided in the storage container.
  • an outflow opening for the need to dispense the carbonated water.
  • this outlet opening is arranged below the pump unit in the known arrangement.
  • the object of the present invention is directed to designing a storage container with an electrically operated circulation pump in such a way that the manufacturing outlay of such an arrangement is reduced as much as possible and a high level of functional reliability is ensured.
  • a reservoir with an electrically operated circulation pump which does justice to this task, is characterized according to the invention in that a flow channel for the drive motor housing of the circulation pump which is led through the wall into the inside of the reservoir and sealed to this wall in the bottom region of the reservoir water to be dispensed is integrated.
  • the flow channel for the water to be dispensed from the storage container into the drive motor housing of the circulating pump, on the one hand it is achieved that the danger of this flow channel being iced has been countered and on the other hand a further opening in the storage container is saved. The danger of icing is therefore no longer a given, since the heat generated in the pump, albeit low, in particular due to resistance losses the flow channel is sufficiently heated in the pump excitation coil.
  • the housing of the circulation pump can usually be made of plastic, so that the flow channel can be created cheaply by injection molding.
  • the storage container is made of stainless steel if it serves as a carbonator in a drinks machine for storing CO2 gas-enriched, cooled and pressurized water, so that the requirements for corrosion resistance and pressure resistance are met. Every breakthrough through its walls is technically complex. In addition, a further sealing problem arises from an additional passage through the wall.
  • the arrangement consisting of reservoir and the circulating pump is characterized in that the fixed electromagnetic coil of the drive motor of the circulating pump is arranged asymmetrically laterally to the rotary armature connected to the pump wheel via a shaft and that the rotary armature-pump wheel shaft is opposite the excitation coil and in the vicinity of the axis line determined by this shaft, the flow channel for the water to be dispensed runs in the drive motor housing.
  • the feed-through opening in the bottom wall of the storage container is arranged asymmetrically in the storage container in such a way that the rotary armature impeller shaft runs essentially flush with the center of the storage container.
  • the asymmetrical arrangement of the electromagnetic coil of the drive motor to the drive shaft and the preferred location of the flow channel through the drive motor housing lead to a very compact, compact design of the circulation pump, while the asymmetrical position of the through opening in the bottom wall of the storage container serves to be able to arrange the circulation pump so that its drive shaft lies in the center of the storage container. This is useful because the circulation pump serves to keep the stored water in a circular movement within the storage container.
  • the circulating pump also serves to suck in and mix in stored CO2 gas from the head region of the storage container.
  • the drive motor housing is formed with walls such that a space open downwards towards the outer region of the storage container for receiving the electromagnetic coil and its armature from an open space upwards into the interior of the storage container for receiving the rotary armature by a Partition is separated.
  • the wall of the drive motor housing thus creates a clean, stable separation between the interior of the storage container and the exterior of this storage container. Only the outflow channel is led through the wall of the drive motor housing.
  • the electrical supply cables can also be in this open area to the outside of the electromagnetic coil.
  • the magnetic field generated by the electromagnetic coil penetrates the walls towards the rotary armature, the storage space of which is open to the interior of the storage container, so that a connection to the pump wheel of the circulating pump can be established without further sealing problems.
  • the space of the drive motor housing which is open to the outside to accommodate the electromagnetic coil is preferably cast with resin after it has been introduced.
  • a flow connection is preferably arranged from the flow channel in the circulation pump housing to the rotor area.
  • This flow connection from the flow channel to the rotor area serves, on the one hand, to ensure that no blind hole areas are formed within this rotor area, in which gas inclusions can be retained, and moreover leads to the water also being able to circulate through this rotor area, thereby preventing overheating.
  • the arrangement formed from a storage container with a circulating pump is characterized in that the drive motor housing is then formed on an installation flange, which is used for internal contact with the storage container wall, to form a bushing to be carried out through the storage container wall, which receptacles for have a fastening part lying on the outside of the storage container wall.
  • the fastening part is preferably fastened to the bushing via a bayonet lock. It will be useful to outline the outer contours the drive motor housing, its flange and its feedthrough design to be rotationally symmetrical.
  • the flow channel through the drive motor housing expediently opens on the output side into a conical connecting piece which adjoins the drive motor housing wall and onto which a connecting piece can be placed. Due to the cast resin, this connector can be securely connected to the conical socket.
  • the reservoir 1 serves as a so-called carbonator for vending machines, through which carbonated water, which is provided by the carboriizer, and beverage concentrates, soft drinks can be mixed and made available.
  • the reservoir 1 is supplied via a line 2 water and a line 3 CO2 gas.
  • the water and CO2 gas are supplied in a known manner depending on the respective Demand, the demand for water can be detected by a water level sensor 4, while the gas supply adjusts itself in accordance with the internal pressure occurring in the reservoir 1.
  • this ice jacket 6 is detected by a sensor 7 and the cooling via the cooling coils 5 is made dependent on its design. Characterized in that the mixture or the solution of water and CO2 gas is liquid in the interior of the storage container and presents itself in the side wall area as an ice jacket, the liquid portion is cooled just below 0 o C to freezing point. By means of a rotating pump wheel 8 of a circulating pump 9, the liquid mixture is kept in a rotating movement within the storage container, so that the ice jacket 6 also forms a cylindrical shape towards the inside.
  • the circulation pump is therefore arranged with its drive motor housing in the storage container 1 in such a way that the pump wheel 8 lies with its axis approximately concentrically with the storage space formed by the walls of the storage container in a rotationally symmetrical manner.
  • the circulation pump which is designed to be rotationally symmetrical at least in its fastening area, has a lead-through piece 11 which is guided through the wall 12 of the storage container 1.
  • the circulation pump is supported on the inside of the wall 12 by a flange 13. This wall 12 is pulled out somewhat in the lead-through area in the exemplary embodiment.
  • annular seal 14 made of elastic material is inserted between the flange 13 of the drive motor housing 9 and the wall 12 of the storage container 1. A fastening piece outside the wall of the drive motor housing is applied to the bushing 11 of the drive motor housing 9 in the manner of a bayonet lock, so that the circulation pump is firmly connected to the storage container 1.
  • the carbonated water is dispensed via a drain line 16, which leads to a dispensing valve which can be designed in a known manner.
  • the circulation pump wheel 8 is driven by an electromagnetic motor, which is essentially formed by an electromagnetic coil 17 and a rotor 18, consisting of a permanent magnet.
  • This rotor 18 is connected to the pump wheel 8 via a hollow shaft 19.
  • This hollow shaft 19 rotates about an axis 20, which is mounted in a vertically aligned manner via elastic intermediate pieces 21 and is preferred for wear-related and storage-technical reasons and is made of ceramic material in a known manner.
  • the electromagnetic coil 17 is arranged on one side of the rotary armature 18 and the ferromagnetic poles 22 are guided laterally to the area of the rotary armature 18.
  • a flow channel 23 is integrated in the drive motor housing 9 of the circulation pump. This flow channel opens on the one hand through an opening 24 into the interior of the storage container 1 and on the other hand in the area of a nozzle 25 to the drain line 16.
  • the space for the rotary armature formed by the housing wall 26 of the drive motor is open in the lower region opposite the flow channel 23, so that this space is also secured by the liquid stored in the storage container 1, completely filled and also cooled by liquid flowing through it.
  • the wall 26 of the drive motor housing 9 of the circulating pump is placed in such a way that it completely separates the space for receiving the electromagnetic coil 17 and its ferromagnetic poles 22 from the areas of the circulating pump which are open to the interior of the storage container 1. Rather, this space for receiving the electromagnetic coil 17 is open in the outer region of the storage container 1.
  • the electromagnetic coil 17 can be inserted from this open side and the connecting lines 27 are led outwards.
  • the space remaining around the electromagnetic coil 17 can be encapsulated by casting resin 28. This casting resin also holds a connection piece 29 which is placed on the outlet-side conical connecting piece 25 of the flow channel 23.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cookers (AREA)
  • Beverage Vending Machines With Cups, And Gas Or Electricity Vending Machines (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Fertilizing (AREA)
  • Catching Or Destruction (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

An electrically drivable circulating pump is arranged in a storage vessel which serves, in particular in a drink vending machine, to store, gassify and cool water, and said pump is led in the base area of said vessel through the vessel wall, a through-flow duct for the water to be dispensed from the storage container being integrated in the circulating pump housing. <IMAGE>

Description

Die vorliegende Erfindung bezieht sich auf einen Vorratsbehälter, insbesondere für Getränkeautomaten zum Bevorraten, Begasen und Kühlen von Wasser mit einer elektrisch betreibbaren Umwälzpumpe, und einer im Bodenbereich des Vorratsbehälters liegenden Austrittsöffnung zur bedarfsweisen Ableitung des Wassers.The present invention relates to a storage container, in particular for vending machines for storing, gassing and cooling water with an electrically operated circulation pump, and an outlet opening located in the bottom region of the storage container for the necessary discharge of the water.

Es ist eine Anordnung einer Umwälzpumpe in einem Karbonisator eines Getränkeautomaten bekannt geworden (DE-A-34 30 952), wobei in dem Karbonisator als Vorratsbehälter aus CO₂-Gas und Frischwasser gemischtes Sodawasser gekühlt und unter Druck stehend für die Entnahme über eine Abflußverbindung bevorratet wird. Dabei ist die Auslaßöffnung im zentralen Bereich des Bodens des Vorratsbehälters vorgesehen und die Umwälzpumpe unmittelbar über der Auslaßöffnung angeordnet. Als weitere Maßnahme ist vorgesehen, daß die Umwalzpumpe an einem Durchführungsstück für den Sodawasser-Auslauf aus dem Vorratsbehälter befestigt ist.There is an arrangement of a circulating pump in a carbonator of a vending machine has become known (DE-A-34 30 952), mixed soda water being cooled in the carbonator as a reservoir made of CO₂ gas and fresh water and being pressurized for removal via a drain connection . The outlet opening is provided in the central region of the bottom of the storage container and the circulation pump is arranged directly above the outlet opening. As a further measure it is provided that the circulating pump on one Feed-through piece for the soda water outlet from the storage container is attached.

Eine derartige Anordnung wird im Zusammenhang mit Getränkeautomaten dazu verwendet, das gekühlte, mit CO₂-Gas angereicherte Wasser unter Druck stehend dazu zu bevorraten, um es bedarfsweise portioniert mit anderweitig zugeführten Getränkekonzentraten zu einem gebrauchsfähigen Getränk zu vermischen.Such an arrangement is used in connection with vending machines to store the cooled water enriched with CO₂ gas under pressure in order to mix it portioned with other concentrated beverage concentrates as needed to form a usable beverage.

Um eine ausreichende Karbonisierung des Frischwassers im Vorratsbehälter zu gewährleisten, ist es erforderlich, die Karbonisierungsmaßnahmen im Vorratsbehälter unter erhöhtem Druck vorzunehmen und durch bekannte Maßnahmen zum Anreichern von Flüssigkeiten mit CO₂-Gas zu unterstützen. Dies kann über eine Umwälzpumpe realisiert werden, welche aus dem Kopfbereich des Vorratsbehälters CO₂-Gas ansaugt und in das Wasser einmischt. Üblicherweise werden derartige Vorratsbehälter auch im Bereich ihrer Wandungen so gekühlt, daß sich in diesem Bereich ein Eismantel ausbildet. Dieser Eismantel dient als Kältekapazität. Damit sich dieser Eismantel gleichmäßig an den Wandungen mit in etwa gleicher Dicke ausbildet, ist es zweckmäßig, wenn nicht sogar notwendig, das Wasser kreisförmig rotieren zu lassen. Auch diese Aufgabe übernehmen in bekannter Weise entsprechend ausgestaltete und angeordnete Umwälzpumpen.In order to ensure adequate carbonation of the fresh water in the storage container, it is necessary to carry out the carbonization measures in the storage container under increased pressure and to support them with known measures for enriching liquids with CO₂ gas. This can be achieved by means of a circulation pump, which draws in CO₂ gas from the top area of the storage container and mixes it into the water. Usually, such storage containers are also cooled in the area of their walls so that an ice jacket is formed in this area. This ice jacket serves as a cooling capacity. So that this ice jacket forms evenly on the walls with approximately the same thickness, it is expedient, if not even necessary, to have the water rotate in a circle. This task is also performed in a known manner by appropriately designed and arranged circulation pumps.

Zur Begasung und Umwälzung des Wassers muß im Vorratsbehälter ein entsprechendes Aggregat angeordnet und befestigt werden und im Vorratsbehälter sind demgemäß entsprechende Befestigungsmittel vorzusehen. Im Nahbereich ist darüber hinaus auch eine Ausflußöffnung für die bedarfsweise Ausgabe des karbonisierten Wassers erforderlich. Um die Funktiontüchtigkeit einer derartigen Anordnung durch Vereisung der Austrittsöffnung nicht zu beeinträchtigen, wird bei der bekannten Anordnung diese Auslaßöffnung unterhalb des Pumpenaggregats angeordnet. Daneben ist es aber auch erforderlich, die Anschlußleitungen für den Motor-Antriebsstrom aus dem Vorratsbehälter herauszuführen.To fumigate and circulate the water, an appropriate unit must be arranged and fastened in the storage container and corresponding fastening means must accordingly be provided in the storage container. In the close range there is also an outflow opening for the need to dispense the carbonated water. In order not to impair the functionality of such an arrangement due to icing of the outlet opening, this outlet opening is arranged below the pump unit in the known arrangement. In addition, it is also necessary to lead the connecting lines for the motor drive current out of the storage container.

Die Aufgabe der vorliegenden Erfindung ist darauf gerichtet, einen Vorratsbehälter mit einer elektrisch betriebenen Umwälzpumpe dahingehend auszugestalten, daß der Herstellungsaufwand einer derartigen Anordnung möglichst reduziert wird und eine hohe Funktionssicherheit gewährleistet ist.The object of the present invention is directed to designing a storage container with an electrically operated circulation pump in such a way that the manufacturing outlay of such an arrangement is reduced as much as possible and a high level of functional reliability is ensured.

Ein Vorratsbehälter mit einer elektrisch betätigbaren Umwälzpumpe, welche dieser Aufgabenstellung gerecht wird, ist erfindungsgemäß dadurch gekennzeichnet, daß in das im Bodenbereich des Vorratsbehälters durch dessen Wandung in das Innere des Vorratsbehälters hindurchgeführte und an dieser Wandung abgedichtet befestigte Antriebsmotor-Gehäuse der Umwälzpumpe ein Durchflußkanal für das auszugebende Wasser integriert ist.A reservoir with an electrically operated circulation pump, which does justice to this task, is characterized according to the invention in that a flow channel for the drive motor housing of the circulation pump which is led through the wall into the inside of the reservoir and sealed to this wall in the bottom region of the reservoir water to be dispensed is integrated.

Durch die Integrierung des Durchflußkanals für das aus dem Vorratsbehälter auszugebende Wasser in das Antriebsmotor-Gehäuse der Umwälzpumpe wird einerseits erreicht, daß der Vereisungsgefahr dieses Durchflußkanals begegnet ist und andererseits wird eine weitere Öffnung im Vorratsbehälter eingespart. Die Vereisungsgefahr ist gesichert deswegen nicht mehr gegeben, da durch die in der Pumpe erzeugte, wenn auch geringe Wärme insbesondere durch Widerstandsverluste in der Pumpenerregerspule der Durchflußkanal genügend erwärmt wird. Das Gehäuse der Umwälzpumpe kann üblicherweise aus Kunststoff ausgeführt sein, so daß darin der Durchflußkanal spritztechnisch günstig erstellt werden kann. Der Vorratsbehälter ist, wenn er als Karbonisator in einem Getränkeautomat zur Bevorratung von mit CO₂-Gas angereichertem, gekühltem und unter Druck stehendem Wasser dient, aus Edelstahl gefertigt, damit die Voraussetzungen für Korrosionsbeständigkeit und Druckfestigkeit gegeben sind. Jeder Durchbruch durch dessen Wandungen ist herstellungstechnisch aufwendig. Außerdem ergibt sich ein weiteres Dichtungsproblem durch eine zusätzliche Durchführung durch die Wandung.By integrating the flow channel for the water to be dispensed from the storage container into the drive motor housing of the circulating pump, on the one hand it is achieved that the danger of this flow channel being iced has been countered and on the other hand a further opening in the storage container is saved. The danger of icing is therefore no longer a given, since the heat generated in the pump, albeit low, in particular due to resistance losses the flow channel is sufficiently heated in the pump excitation coil. The housing of the circulation pump can usually be made of plastic, so that the flow channel can be created cheaply by injection molding. The storage container is made of stainless steel if it serves as a carbonator in a drinks machine for storing CO₂ gas-enriched, cooled and pressurized water, so that the requirements for corrosion resistance and pressure resistance are met. Every breakthrough through its walls is technically complex. In addition, a further sealing problem arises from an additional passage through the wall.

Nach einer bevorzugten Ausgestaltung ist die aus Vorratsbehälter und der Umwälzpumpe bestehende Anordnung dadurch gekennzeichnet, daß die ortsfeste Elektromagnetspule des Antriebsmotors der Umwälzpumpe asymmetrisch seitlich zu dessen über eine Welle mit dem Pumpenrad verbundenen Drehanker angeordnet ist und daß bezüglich der Drehanker-Pumpenrad-Welle gegenüber der Erregerspule und im Nahbereich der durch diese Welle bestimmten Achslinie der Durchflußkanal für das auszugebende Wasser im Antriebsmotor-Gehäuse verläuft.According to a preferred embodiment, the arrangement consisting of reservoir and the circulating pump is characterized in that the fixed electromagnetic coil of the drive motor of the circulating pump is arranged asymmetrically laterally to the rotary armature connected to the pump wheel via a shaft and that the rotary armature-pump wheel shaft is opposite the excitation coil and in the vicinity of the axis line determined by this shaft, the flow channel for the water to be dispensed runs in the drive motor housing.

Dabei ist es zweckmäßig, daß die Durchführungsöffnung in der bodenseitigen Wandung des Vorratsbehälters derart asymmetrisch im Vorratsbehälter angeordnet ist, daß die Drehanker-Pumpenrad-Welle im wesentlichen mit dem Zentrum des Vorratsbehälters fluchtend verläuft. Die asymmetrische Anordnung der Elektromagnetspule des Antriebsmotors zu dessen Antriebswelle und die bevorzugt vorgesehene Lage des Durchflußkanals durch das Antriebsmotor-Gehäuse führen zu einer sehr gedrängten, kompakten Bauweise der Umwälzpumpe, während die asymmetrische Lage der Durchführungsöffnung in der bodenseitigen Wandung des Vorratsbehälters dazu dient, die Umwälzpumpe so anzuordnen zu können, daß deren Antriebswelle im Zentrum des Vorratsbehälters liegt. Dies ist deshalb zweckmäßig, da die Umwälzpumpe dazu dient, innerhalb des Vorratsbehälters das bevorratete Wasser in einer kreisförmigen Bewegung zu halten. Damit soll erreicht werden, daß der sich durch die Kühlung in den Randbereichen ausbildende Eismantel bezüglich seiner nach innen gerichteten Wandung möglichst zylindrisch ausbildet. Neben der Funktion, das bevorratete Wasser in Drehung zu halten, dient die Umwälzpumpe auch dazu, aus dem Kopfbereich des Vorratsbehälters bevorratetes CO₂-Gas in das Wasser einzusaugen und einzumischen.It is expedient that the feed-through opening in the bottom wall of the storage container is arranged asymmetrically in the storage container in such a way that the rotary armature impeller shaft runs essentially flush with the center of the storage container. The asymmetrical arrangement of the electromagnetic coil of the drive motor to the drive shaft and the preferred location of the flow channel through the drive motor housing lead to a very compact, compact design of the circulation pump, while the asymmetrical position of the through opening in the bottom wall of the storage container serves to be able to arrange the circulation pump so that its drive shaft lies in the center of the storage container. This is useful because the circulation pump serves to keep the stored water in a circular movement within the storage container. This is to ensure that the ice jacket formed by the cooling in the edge regions is as cylindrical as possible with respect to its inward-facing wall. In addition to the function of keeping the stored water rotating, the circulating pump also serves to suck in and mix in stored CO₂ gas from the head region of the storage container.

Nach einer anderen bevorzugten Ausgestaltung der Erfindung ist das Antriebsmotorgehäuse mit Wandungen derart ausgebildet, daß ein nach unten gegen den Außenbereich des Vorratsbehälters offener Raum zur Aufnahme der Elektromagnetspule und dessen Anker von einem nach oben in das Innere des Vorratsbehälters offenen Raum zur Aufnahme des Drehankers durch eine Zwischenwandung getrennt ist. Damit ist durch die Wandung des Antriebsmotor-Gehäuses eine saubere stabile Trennung zwischen dem Inneren des Vorratsbehälters und dem Äußeren dieses Vorratsbehälters geschaffen. Lediglich der Ausflußkanal ist durch die Wandung des Antriebsmotor-Gehäuse hindurchgeführt. Nachdem der Raum für die Elektromagnetspule innerhalb des Antriebsmotor-Gehäuses nach außen offen ausgebildet ist, können in diesem offenen Bereich auch die elektrischen Zuführungskabel zu der Elektromagnetspule nach außen herausgeführt werden. Das durch die Elektromagnetspule erzeugte Magnetfeld durchdringt die Wandungen hin zum Drehanker, dessen Lagerraum hin zum Inneren des Vorratsbehälters geöffnet ist, so daß ohne weitere Dichtungsprobleme eine Verbindung zum Pumpenrad der Umwälzpumpe herstellbar ist.According to another preferred embodiment of the invention, the drive motor housing is formed with walls such that a space open downwards towards the outer region of the storage container for receiving the electromagnetic coil and its armature from an open space upwards into the interior of the storage container for receiving the rotary armature by a Partition is separated. The wall of the drive motor housing thus creates a clean, stable separation between the interior of the storage container and the exterior of this storage container. Only the outflow channel is led through the wall of the drive motor housing. After the space for the electromagnetic coil within the drive motor housing is made open to the outside, the electrical supply cables can also be in this open area to the outside of the electromagnetic coil. The magnetic field generated by the electromagnetic coil penetrates the walls towards the rotary armature, the storage space of which is open to the interior of the storage container, so that a connection to the pump wheel of the circulating pump can be established without further sealing problems.

Der nach außen an sich offene Raum des Antriebsmotor-Gehäuses zur Aufnahme der Elektromagnetspule ist nach deren Einbringung bevorzugt mit Gießharz vergossen.The space of the drive motor housing which is open to the outside to accommodate the electromagnetic coil is preferably cast with resin after it has been introduced.

Vom Durchflußkanal im Umwälzpumpengehäuse hin zum Rotorbereich ist bevorzugterweise eine Durchflußverbindung angeordnet. Diese Durchflußverbindung vom Durchflußkanal zum Rotorbereich dient zum einen dazu, daß innerhalb dieses Rotorbereichs keine Sacklochbereiche gebildet werden, in denen sich Gaseinschlüsse halten können, und führt darüber hinaus dazu, daß das Wasser durch diesen Rotorbereich auch zirkulieren kann, wodurch dort einer Übererwärmung vorgebeugt wird.A flow connection is preferably arranged from the flow channel in the circulation pump housing to the rotor area. This flow connection from the flow channel to the rotor area serves, on the one hand, to ensure that no blind hole areas are formed within this rotor area, in which gas inclusions can be retained, and moreover leads to the water also being able to circulate through this rotor area, thereby preventing overheating.

Nach einer weiteren bevorzugten Ausgestaltung der Erfindung ist die aus Vorratsbehälter mit Umwälzpumpe gebildete Anordnung dadurch gekennzeichnet, daß das Antriebsmotor-Gehäuse anschließend an einem zur Innenanlage an die Vorratsbehälter-Wandung dienenden Anlageflansch zu einem durch die Vorratsbehälter-Wandung durchzuführenden Durchführungsstutzen ausgebildet ist, welche Aufnahmen für ein außen an der Vorratsbehälter-Wandung anliegendes Befestigungsteil aufweisen. Dabei ist bevorzugt das Befestigungsteil über einen Bajonettverschluß am Durchführungsstutzen befestigt. Es wird zweckmäßig sein, die Außenkonturen des Antriebsmotor-Gehäuses, dessen Flansch und dessen Durchführungsstutzen rotationssymmetrisch auszugestalten.According to a further preferred embodiment of the invention, the arrangement formed from a storage container with a circulating pump is characterized in that the drive motor housing is then formed on an installation flange, which is used for internal contact with the storage container wall, to form a bushing to be carried out through the storage container wall, which receptacles for have a fastening part lying on the outside of the storage container wall. In this case, the fastening part is preferably fastened to the bushing via a bayonet lock. It will be useful to outline the outer contours the drive motor housing, its flange and its feedthrough design to be rotationally symmetrical.

Zweckmäßigerweise mündet der Durchflußkanal durch das Antriebsmotor-Gehäuse ausgangsseitig in einen an die Antriebsmotor-Gehäusewandung anschließenden, konischen Stutzen, auf den ein Anschlußstück aufsetzbar ist. Durch das eingebrachte Gießharz kann dieses Anschlußstück fest mit dem konischen Stutzen haltbar verbunden werden.The flow channel through the drive motor housing expediently opens on the output side into a conical connecting piece which adjoins the drive motor housing wall and onto which a connecting piece can be placed. Due to the cast resin, this connector can be securely connected to the conical socket.

Ein nach Merkmalen der Erfindung ausgestaltetes Ausführungsbeispiel ist anhand der Zeichnung im folgenden näher beschrieben. Es zeigen:

Fig. 1
Eine schematisierte Ansicht eines als Karbonisator in einem Getränkeautomaten dienenden Vorratsbehälters mit Umwälzpumpe und
Fig. 2 bis Fig. 4
drei verschiedene Ansichten - teilweise im schnitt - der Umwälzpumpe mit Durchführungskanal.
An embodiment designed according to the features of the invention is described in more detail below with reference to the drawing. Show it:
Fig. 1
A schematic view of a storage container with a circulating pump and serving as a carbonizer in an automatic drinks machine
2 to 4
three different views - partly in section - of the circulation pump with duct.

Der Vorratsbehälter gemäß Fig. 1 dient als sogenannter Karbonisator für Getränkeautomaten, durch den aus karbonisiertem Wasser, das durch den Karboriisator bereitgestellt wird, und Getränkekonzentraten Erfrischungsgetränke mischbar und bereitstellbar sind. Dem Vorratsbehälter 1 wird über eine Leitung 2 Wasser und über eine Leitung 3 CO₂-Gas zugeführt. Die Zuführung des Wassers und des CO₂-Gases erfolgt in bekannter Weise in Abhängigkeit des jeweiligen Bedarfs, wobei der Bedarf des Wassers durch einen Wasserstandssensor 4 erfaßbar ist, während sich die Gaszufuhr entsprechend dem auftretenden Innendruck im Vorratsbehälter 1 nachregelt. Über Kühlschlangen 5, die um den Vorratsbehälter 1 von außen her gelegt sind, wird dieser Vorratsbehälter 1 derart mit Kälte beaufschlagt, daß sich in den Wandungsbereichen des Vorratsbehälters ein Eismantel 6 ausbildet. Über einen Sensor 7 wird die Stärke dieses Eismantels 6 erfaßt und die Kühlung über die Kühlschlangen 5 wird von dessen Ausbildung abhängig gemacht. Dadurch, daß im Inneren des Vorratsbehälters das Gemisch bzw. die Lösung aus Wasser und CO₂-Gas flüssig ist und im seitlichen Wandungsbereich sich als Eismantel darstellt, ist der flüssige Anteil knapp unter 0o C zum Gefrierpunkt hin gekühlt. Durch ein rotierendes Pumpenrad 8 einer Umwälzpumpe 9 wird das flüssige Gemisch innerhalb des Vorratsbehälters in drehender Bewegung gehalten, so daß sich der Eismantel 6 zylinderförmig auch nach innen hin ausbildet. Die Umwälzpumpe ist mit seinem Antriebsmotor-Gehäuse deshalb im Vorratsbehälter 1 derart angeordnet, daß das Pumpenrad 8 mit seiner Achse in etwa konzentrisch zum rotationssymmetrisch durch die Wandungen des Vorratsbehälters gebildeten Vorratsraum liegt. Durch ein vom Pumpenrad ausgehendes, in den CO₂-Gasbereich reichendes Rohr 10 wird durch das Pumpenrad 8 dieses CO₂-Gas angesaugt und in die Flüssigkeit eingemischt. Die Umwälzpumpe, die zumindest in ihrem Befestigungsbereich rotationssymmetrisch ausgebildet ist, besitzt ein Durchführungsstück 11, welches durch die Wandung 12 des Vorratsbehälters 1 hindurchgeführt ist. Über einen Flansch 13 stützt sich die Umwälzpumpe an der Innenseite der Wandung 12 ab. Diese Wandung 12 ist im Durchführungsbereich im Ausführungsbeispiel nach außen etwas herausgezogen. Zwischen dem Flansch 13 des Antriebsmotor-Gehäuses 9 und der Wandung 12 des Vorratsbehälters 1 ist eine Ringdichtung 14 aus elastischem Material eingelegt. Bajonettverschlußartig ist auf den Durchführungsstutzen 11 des Antriebsmotor-Gehäuses 9 ein Befestigungsstück außerhalb der Wandung des Antriebsmotor-Gehäuses aufgebracht, so daß die Umwälzpumpe fest mit dem Vorratsbehälter 1 verbunden ist.1 serves as a so-called carbonator for vending machines, through which carbonated water, which is provided by the carboriizer, and beverage concentrates, soft drinks can be mixed and made available. The reservoir 1 is supplied via a line 2 water and a line 3 CO₂ gas. The water and CO₂ gas are supplied in a known manner depending on the respective Demand, the demand for water can be detected by a water level sensor 4, while the gas supply adjusts itself in accordance with the internal pressure occurring in the reservoir 1. Via cooling coils 5, which are placed around the storage container 1 from the outside, this storage container 1 is subjected to cold in such a way that an ice jacket 6 forms in the wall regions of the storage container. The thickness of this ice jacket 6 is detected by a sensor 7 and the cooling via the cooling coils 5 is made dependent on its design. Characterized in that the mixture or the solution of water and CO₂ gas is liquid in the interior of the storage container and presents itself in the side wall area as an ice jacket, the liquid portion is cooled just below 0 o C to freezing point. By means of a rotating pump wheel 8 of a circulating pump 9, the liquid mixture is kept in a rotating movement within the storage container, so that the ice jacket 6 also forms a cylindrical shape towards the inside. The circulation pump is therefore arranged with its drive motor housing in the storage container 1 in such a way that the pump wheel 8 lies with its axis approximately concentrically with the storage space formed by the walls of the storage container in a rotationally symmetrical manner. Through a tube 10 starting from the impeller and reaching into the CO₂ gas region, this CO₂ gas is sucked in through the impeller 8 and mixed into the liquid. The circulation pump, which is designed to be rotationally symmetrical at least in its fastening area, has a lead-through piece 11 which is guided through the wall 12 of the storage container 1. The circulation pump is supported on the inside of the wall 12 by a flange 13. This wall 12 is pulled out somewhat in the lead-through area in the exemplary embodiment. Between the flange 13 of the drive motor housing 9 and the wall 12 of the storage container 1, an annular seal 14 made of elastic material is inserted. A fastening piece outside the wall of the drive motor housing is applied to the bushing 11 of the drive motor housing 9 in the manner of a bayonet lock, so that the circulation pump is firmly connected to the storage container 1.

Die Ausgabe des karbonisierten Wassers erfolgt über eine Abflußleitung 16, welche zu einem Ausgabeventil führt, das in bekannter Weise ausgestaltet sein kann.The carbonated water is dispensed via a drain line 16, which leads to a dispensing valve which can be designed in a known manner.

Die Umwälzpumpe ist etwas eingehender anhand der Figuren 2 bis 4 erläutert. In der Figur 3 ist gegenüber der Figur 1 die Richtung der Abflußleitung umgedreht.The circulation pump is explained in somewhat more detail with reference to FIGS. 2 to 4. In FIG. 3, the direction of the drain line is reversed compared to FIG.

Angetrieben wird das Umwälzpumpenrad 8 durch einen Elektromagnetmotor, welcher im wesentlichen gebildet ist durch eine Elektromagnetspule 17 und einen Rotor 18, bestehend aus einem Permanentmagneten. Über eine Hohlwelle 19 ist dieser Rotor 18 mit dem Pumpenrad 8 verbunden. Diese Hohlwelle 19 rotiert um eine Achse 20, die über elastische Zwischenstücke 21 senkrecht ausgerichtet gelagert ist und aus verschleißtechnischen und lagertechnischen Gründen bevorzugt und in bekannter Weise aus keramischem Werkstoff besteht. Wie den Figuren 3 und 4 zu entnehmen ist, ist die Elektromagnetspule 17 auf der einen Seite des Drehankers 18 angeordnet und die ferromagnetischen Pole 22 sind seitlich an den Bereich des Drehankers 18 herangeführt. Bezüglich der Achse des Drehankers 18 auf der der Elektromagnetspule 17 gegenüberliegenden Seite ist im Antriebsmotor-Gehäuse 9 der Umwälzpumpe ein Durchflußkanal 23 integriert. Dieser Durchflußkanal mündet einerseits durch eine Öffnung 24 in das Innere des Vorratsbehälters 1 und andererseits im Bereich eines Stutzens 25 hin zur Abflußleitung 16.The circulation pump wheel 8 is driven by an electromagnetic motor, which is essentially formed by an electromagnetic coil 17 and a rotor 18, consisting of a permanent magnet. This rotor 18 is connected to the pump wheel 8 via a hollow shaft 19. This hollow shaft 19 rotates about an axis 20, which is mounted in a vertically aligned manner via elastic intermediate pieces 21 and is preferred for wear-related and storage-technical reasons and is made of ceramic material in a known manner. As can be seen from FIGS. 3 and 4, the electromagnetic coil 17 is arranged on one side of the rotary armature 18 and the ferromagnetic poles 22 are guided laterally to the area of the rotary armature 18. With regard to the axis of the rotary armature 18 on the side opposite the electromagnetic coil 17, a flow channel 23 is integrated in the drive motor housing 9 of the circulation pump. This flow channel opens on the one hand through an opening 24 into the interior of the storage container 1 and on the other hand in the area of a nozzle 25 to the drain line 16.

Der durch die Gehäusewandung 26 des Antriebsmotors gebildete Raum für den Drehanker ist im unteren Bereich gegenüber dem Durchflußkanal 23 geöffnet, so daß dieser Raum auch durch die im Vorratsbehälter 1 bevorratete Flüssigkeit gesichert, vollständig ausgefüllt wird und durch durchströmende Flüssigkeit auch gekühlt wird. Die Wandung 26 des Antriebsmotor-Gehäuses 9 der Umwälzpumpe ist derart gelegt, daß sie den Raum zur Aufnahme der Elektromagnetspule 17 und deren ferromagnetischen Polen 22 völlig von den Bereichen der Umwälzpumpe, die gegenüber dem Inneren des Vorratsbehälters 1 offen sind, abtrennt. Dieser Raum zur Aufnahme der Elektromagnetspule 17 ist vielmehr in den Außenbereich des Vorratsbehälters 1 offen. Von dieser offenen Seite ist die Elektromagnetspule 17 einsetzbar und die Anschlußleitungen 27 sind nach außen herausgeführt. Der um die Elektromagnetspule 17 verbleibende Raum kann durch Gießharz 28 vergossen sein. Durch dieses Gießharz wird auch ein Anschlußstück 29, welches auf den ausgangsseitigen konischen Stutzen 25 des Durchflußkanals 23 aufgesetzt ist, gehalten.The space for the rotary armature formed by the housing wall 26 of the drive motor is open in the lower region opposite the flow channel 23, so that this space is also secured by the liquid stored in the storage container 1, completely filled and also cooled by liquid flowing through it. The wall 26 of the drive motor housing 9 of the circulating pump is placed in such a way that it completely separates the space for receiving the electromagnetic coil 17 and its ferromagnetic poles 22 from the areas of the circulating pump which are open to the interior of the storage container 1. Rather, this space for receiving the electromagnetic coil 17 is open in the outer region of the storage container 1. The electromagnetic coil 17 can be inserted from this open side and the connecting lines 27 are led outwards. The space remaining around the electromagnetic coil 17 can be encapsulated by casting resin 28. This casting resin also holds a connection piece 29 which is placed on the outlet-side conical connecting piece 25 of the flow channel 23.

Claims (10)

  1. Stock container (1), in particular for automatic beverage dispensers for the stocking, carbonating and cooling of water, with an electrically operated circulating pump (9) and an exit opening (16, 23), which lies in the base region of the stock container, for the discharge of water as needed, characterised thereby, that a throughflow channel (23) for the water to be issued is integrated into the drive motor housing (9), which is led into the interior of the stock container (1) through the wall (12) of the stock container (1) in the base region thereof and fastened to be sealed at this wall (12), of the circulating pump.
  2. Stock container with a circulating pump according to claim 1, characterised thereby, that the fixedly located electromagnet coil (17) of the drive motor of the circulating pump (9) is arranged asymmetrically laterally of its rotary armature (18), which is connected with the pump wheel (8) by way of a shaft (19), and that the throughflow channel (23) for the water to be issued extends, opposite the exciter coil (17) with respect to the shaft (19) of the rotary armature and the pump wheel and in the proximity of the axial line determined by this shaft (19), in the drive motor housing (9).
  3. Stock container with a circulating pump according to claim 2, characterised thereby, that the feedthrough opening in the wall (12) at the base side of the stock container (1) is arranged asymmetrically in the stock container (1) in such a manner that the shaft (19) of the rotary armature and the pump wheel extends substantially in alignment with the centre of the stock container (1).
  4. Stock container with a circulating pump according to one of the claims 1 to 4, characterised thereby, that the drive motor housing (9) is constructed with walls (26) in such a manner that a chamber, which is downwardly open towards the outside region of the stock container (1), for the reception of the electromagnet coil (17) and its ferromagnetic pole (22) is separated by a partition from a chamber which is open into the interior of the stock container (1) for the reception of the rotary armature (18).
  5. Stock container with a circulating pump according to one of the claims 1 to 4, characterised thereby, that a throughflow connection exists starting out from the throughflow channel (23) to the receiving chamber for the rotary armature (18).
  6. Stock container with a circulating pump according to one of the claims 1 to 5, characterised thereby, that the drive motor housing (9) is, adjacent a jointing flange (13) serving for internal bearing against the stock container wall (12), constructed into a feedthrough nipple (11), which is to be led through the stock container wall (12) and displays receptacles for a fastening part (15) lying externally against the stock container wall (12).
  7. Stock container with a circulating pump according to claim 6, characterised thereby, that the fastening part (15) is fastenable by way of a bayonet fastener at the feedthrough nipple (11) of the drive motor housing (9).
  8. Stock container with a circulating pump according to one of the claims 1 to 7, characterised thereby, that the throughflow channel (23) through the drive motor housing (9) opens at the exit side into a conical nipple (25), which adjoins the circulating pump housing wall (26) and onto which a connecting member (29) is settable.
  9. Stock container with a circulating pump according to one of the claims 1 to 8, characterised thereby, that that chamber of the drive motor housing (9), which serves for the reception of the electromagnet coil (17), is filled out by casting resin (28), through which the electrical connecting lines (27) for the electromagnet coil (17) are led out.
  10. Stock container with a circulating pump according to the claims 8 and 9, characterised thereby, that the connecting member (29) is fastened by the casting resin on the conical nipple (25) of the throughflow channel (23).
EP91113583A 1990-08-16 1991-08-13 Storage vessel with an electric-driven circulating pump Expired - Lifetime EP0471343B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4025986 1990-08-16
DE4025986 1990-08-16

Publications (3)

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EP0471343A2 EP0471343A2 (en) 1992-02-19
EP0471343A3 EP0471343A3 (en) 1992-06-17
EP0471343B1 true EP0471343B1 (en) 1995-11-08

Family

ID=6412374

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Application Number Title Priority Date Filing Date
EP91113583A Expired - Lifetime EP0471343B1 (en) 1990-08-16 1991-08-13 Storage vessel with an electric-driven circulating pump

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US (1) US5184942A (en)
EP (1) EP0471343B1 (en)
AT (1) ATE129930T1 (en)
CA (1) CA2048101C (en)
DE (1) DE59106845D1 (en)
DK (1) DK0471343T3 (en)

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Also Published As

Publication number Publication date
CA2048101C (en) 1995-01-17
DE59106845D1 (en) 1995-12-14
DK0471343T3 (en) 1996-03-18
EP0471343A3 (en) 1992-06-17
ATE129930T1 (en) 1995-11-15
CA2048101A1 (en) 1992-02-17
EP0471343A2 (en) 1992-02-19
US5184942A (en) 1993-02-09

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