EP1092384B1 - Dishwasher and method for determining the type and concentration of mixtures in a liquid - Google Patents

Dishwasher and method for determining the type and concentration of mixtures in a liquid Download PDF

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Publication number
EP1092384B1
EP1092384B1 EP00121978A EP00121978A EP1092384B1 EP 1092384 B1 EP1092384 B1 EP 1092384B1 EP 00121978 A EP00121978 A EP 00121978A EP 00121978 A EP00121978 A EP 00121978A EP 1092384 B1 EP1092384 B1 EP 1092384B1
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EP
European Patent Office
Prior art keywords
rinsing solution
radiation
hollow body
liquid
rinsing
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EP00121978A
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German (de)
French (fr)
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EP1092384A2 (en
EP1092384A3 (en
Inventor
Roland Dipl.-Ing. Rieger (FH)
Christian Wolf
Antonio Rizzo
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP1092384A3 publication Critical patent/EP1092384A3/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps

Definitions

  • the invention relates to a dishwasher having a rinsing container and a circulating pump which pumps a rinsing liquor into the rinsing container through a liquid inlet, a measuring device having at least one measuring section being provided for determining the type and concentration of admixing parts in the rinsing liquor upstream of the liquid inlet Radiation is emitted by means of at least one radiation source, wherein by means of at least one radiation receiver the transmitted and / or lateral scattered and / or backward scattered radiation quantity is detected, and with at least one unit for controlling the at least one radiation source and for evaluating the signal of the at least one radiation receiver.
  • a device for the treatment of dishes in dishwashers is eg from the DE-A1-198 06 559 known, in which the liquid to be examined - in this case a "rinse" cleaning liquid called - is kept in circulation, that is circulated by a pump.
  • a pump On the basis of the data determined with regard to admixture proportions - in this case with regard to contamination fractions in the wash liquor - parameters for a running wash program are set in the said publication.
  • the invention is therefore based on the object in a device of the type mentioned to avoid the risk of falsification of the determination result and thus the process controlled by this result in a simple manner.
  • the measuring section is provided in an area or at the end of a circular movement of the washing liquor generating device, the gas bubbles in the wash liquor in the direction of the center of the circular motion of the rinse after arranged inside on its inner wall substantially in a plane separated from the depressed to the outside Beimischungsan turnover, and that the radiation source of the measuring device irradiates radiation in the wash liquor when passing through the measuring section outside the plane in which the gas bubbles have accumulated.
  • the centrifugal force on the liquid and on the gas bubbles trapped in the liquid, as well as on the admixture components present in the liquid acts on the circular movement of the liquid in the means for establishing a circular movement of the liquid in the direction of flow at the beginning of the measuring device.
  • the heavy admixture components are moved further outward than the lighter gas bubbles due to the higher centrifugal forces in the liquid moving in the circle.
  • the gas bubbles arrange substantially in one plane, namely as far as possible inwards, i. as far as possible in the direction of the center of the circular motion and it is possible in a simple manner to radiate the radiated into the liquid radiation in a region of the liquid in which there are no gas bubbles.
  • the measuring section may be arranged in the device for generating a circular movement of the liquid.
  • the measuring section is advantageously in an area of a circular movement of the liquid generating Arrangement arranged in which the separation of the admixture has already taken place, but the re-mixing of the admixing has not occurred again. With this measure, a renewed mixing of the admixture components contained in the liquid and the enclosed gas bubbles before the task-specific determination of the type and concentration of admixing components in the liquid is reliably avoided.
  • the measuring section can be arranged directly at the end of the device generating a circular movement of the liquid, or alternatively in the device for producing a circular movement of the liquid in the region of the end of the device.
  • the invention also relates to a method for determining the type and concentration of admixture components in the wash liquor of a dishwasher, which is pumped by a circulation pump through a liquid inlet into the washing container of the dishwasher, by means of a measuring device with at least one measuring section in front of the liquid inlet into which At least one radiation source radiation is emitted, and wherein by means of at least one radiation receiver the transmitted and / or laterally scattered and / or backward scattered radiation quantity is detected by means of at least one unit, the at least one radiation source and the signal of at least one radiation receiver devalued is, which is characterized in that for the rinsing liquor by means of a device, a circular movement is generated by the gas bubbles in the rinsing liquor in the direction of the center of the K travel movement of the rinsing liquor inwardly to the inner wall of the device are arranged substantially in a plane separate from the outwardly pressed admixture parts, that is traversed by the so separated rinsing the measuring section
  • the liquid is placed in a circular motion, in particular a rapid circular movement. Due to the rotational movement of the liquid, the centrifugal force acts on the liquid and on the gas bubbles trapped in the liquid as well as on the admixture components present in the liquid. The heavy admixture components are moved further outward than the lighter gas bubbles due to the higher centrifugal forces in the liquid moving in the circle. Also displace the inevitably outwardly moving admixture shares located there gas bubbles further inward.
  • the gas bubbles according to the method according to the invention arrange substantially in one plane, namely as far in as possible inwards, i. as far as possible in the direction of the center of the circular motion and it is possible in a simple manner to irradiate the radiated into the liquid radiation in a region of the liquid in which there are no gas bubbles.
  • the liquid inlet of the measuring device is equipped with the device which generates the circular movement of the rinsing liquor.
  • This is in particular designed as a hollow body with a circular cross section, advantageously as a helically formed hollow body, preferably as a spirally formed hollow body.
  • a sufficient speed of the circular movement of the liquid is preferably achieved in the spirally formed hollow body in that the liquid is introduced at the outer periphery of the spirally formed hollow body and discharged at the innermost periphery of the spirally formed hollow body.
  • the hollow body is a hose, alternatively, the hollow body may also be a pipe or an integrally manufactured part with correspondingly shaped passages.
  • the hollow body is a pump housing of a pump.
  • the pump housing of a pump since the pump housing of a pump usually has a spiral-shaped liquid guide, a component which is present anyway when using the method according to the invention and the device according to the invention can be used.
  • a sufficient speed of the circular movement of the liquid is thereby secured when using a pump housing of a pump as a hollow body in that the hollow body is a pump housing of a pump continued through a circular shaped hollow body.
  • the device according to the invention in dishwashers for determining as admixture shares z.
  • the nature and concentration of contaminants and / or detergent components in the rinsing liquor whereby the washing program can be controlled.
  • Fig. 1 shows a general illustration of a schematically illustrated, unspecified dishwashing machine in longitudinal section.
  • a washing container 1 of the dishwasher is accessible for loading and unloading an upper or a lower dish rack 2, 3 via a front door 4.
  • a rinsing liquor called cleaning liquid is pumped by means of a circulating pump 5 through a riser 6 to two rotatable spray arms 7, 8, which are arranged below the respective dish rack 2, 3 for winding the dishes.
  • a rinsing liquor called cleaning liquid is pumped by means of a circulating pump 5 through a riser 6 to two rotatable spray arms 7, 8, which are arranged below the respective dish rack 2, 3 for winding the dishes.
  • the wash program is by setting parameters by means not shown unit for controlling the at least one radiation source and for evaluating the signal of the at least one radiation receiver, which is part of the inventive device 10, 10 ', 10 "and in the embodiments part of a program control unit, not shown
  • a safe function of the device 10, 10 ', 10 "according to the invention is ensured by the fact that they in all the illustrated embodiments in the flow direction - indicated by arrows - after the circulation pump 5 and before the liquid inlet into the washing 1, in the embodiments before the riser 6, is arranged.
  • gas bubbles trapped in the rinsing liquor by the process according to the invention are influenced in such a way that they are arranged essentially in one plane. This is achieved in the embodiments shown and explained by the fact that the rinsing liquor is set in a rapid circular motion. Due to the fast rotational movement of the wash liquor, the centrifugal force acts on the wash liquor and on the gas bubbles trapped in the wash liquor, as well as on the contamination fractions present in the wash liquor. The heavy pollution components are moved further outward than the lighter gas bubbles due to the higher centrifugal forces in the rinsing fluid moving in circles. They are also inevitably displacing outside moved pollution shares located there gas bubbles further inside.
  • the gas bubbles arrange substantially in one plane, namely as far as possible inward, ie as far as possible in the direction of the center of the circular motion.
  • the targeted arrangement of the gas bubbles makes it possible in a simple manner to irradiate the radiation radiated into the rinsing liquor in a region of the rinsing liquor in which there are no gas bubbles.
  • a liquid inlet 11, 11 ', 11 "of the device 10, 10', 10" is equipped with a device 12, 12 ', 12 "for producing a circular movement of the rinsing liquor
  • the measuring section 13, 13 ', 13 " is arranged directly at the end of the device 12, 12', 12" for generating a circular movement of the rinsing fluid
  • the measuring section could also be in the device for generating a circular movement of the rinsing fluid in a region of the device in which the separation of the admixture parts has already taken place but the remixing of the admixing parts has not yet re-occurred, thus arranging a renewed mixing of the impurities in the flushing solution and the enclosed gas bubbles before the determination the type and concentration of n contamination components safely avoided in the wash liquor.
  • the liquid inlet 11, 11 ', 11 "of the device 10, 10, 10" is arranged directly at the end of the device 12, 12', 12" for generating a circular movement of the rinsing fluid
  • Fig. 2 an advantageous embodiment of the invention is shown, in which the means 12 for generating a circular movement of the rinsing liquor is designed as a helically formed hollow body.
  • a tube is used as a hollow body, alternatively, a hose or an integrally manufactured part could be used with correspondingly shaped passages.
  • a sufficient speed of the circular motion of the rinsing liquor from three better four turns is achieved. This is a very easy way to produce the circular movement of the rinsing liquor by the method according to the invention.
  • Fig. 3 shows the preferred embodiment of the invention, in which the means 12 'for generating a circular movement of the rinsing liquor is designed as a spirally formed hollow body.
  • a tube is used as a hollow body, alternatively, a hose or an integrally manufactured part could be used with correspondingly shaped passages.
  • a sufficient speed of the circular motion of the rinsing liquor is preferably achieved in the spirally formed hollow body in that the Spütflotte is introduced at the outer periphery of the spirally formed hollow body and at the innermost circumference of the spirally formed hollow body to the measuring section 13 'is discharged.
  • FIG. 4 A further advantageous embodiment of the invention is shown, in which the device 12 "for generating a circular movement of the rinsing fluid is a pump housing 9 of the circulating pump 5.
  • the device 12 "for generating a circular movement of the rinsing fluid is a pump housing 9 of the circulating pump 5.
  • a sufficient speed of the circular movement of the fluid is thereby ensured when using the pump housing 9 of the circulating pump 5 that this is continued by a circular shaped hollow body 14 ", which is again formed as a tube, alternatively could also be a hose or an integrally manufactured part with correspondingly shaped passages use continued.
  • the pump housing 9 of a pump and thus also of the circulation pump 5 of a dishwasher usually has a helical liquid guide, a component which is present anyway when using the method according to the invention and the device 10 "according to the invention can advantageously be used in this embodiment of the invention.
  • FIG. 12 is an enlarged view of the exit region of the device 12, 12 ', 12 "for producing a circular movement of the liquid of the device 10, 10', 10" according to the invention for determining the type and concentration of contaminants in the wash liquor, in section inventive method for determination the nature and concentration of admixing components in a liquid - in the exemplary embodiments for determining the type and concentration of contaminants in the wash liquor and the function of the device 10, 10 ', 10 "according to the invention together that the measuring section 13, 13 ', 13 "is arranged directly at the end of the device 12, 12', 12" for producing a circular movement of the rinsing liquor Hollow body 14 "of the embodiment according to Fig.
  • FIG. 5 which represents the end of the device 12, 12 ', 12 "for producing a circular movement of the rinsing liquor, is the in Fig. 5
  • the area of the device 10, 10 ', 10 "according to the invention is indicated by large, dark dots, the small parts of which contain the admixture portions A contained in the wash liquor, in the exemplary embodiments shown the contaminant fractions contained in the wash liquor the device 10, 10 ', 10 ", as far as it can be seen, mainly from left to right.
  • the direction of flow is indicated by arrows.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

The method involves directing a radiation beam into the liquid, detecting (10) the radiation re-emerging from the liquid and determining the type and concentration of the additives from the radiation. Gas bubbles in the liquid are influenced so as to be essentially arranged in a plane. The liquid is set into a rapid circular motion by a device immediately before a measurement section (13). Independent claims are also included for the following: an arrangement for implementing the method.

Description

Die Erfindung betrifft einen Geschirrspüler mit einem Spülbehälter und einer Umwälzpumpe, die eine Spülflotte durch einen Flüssigkeitseinlass in den Spülbehälter pumpt, wobei zur Bestimmung der Art und der Konzentration von Beimischungsteilen in der Spülflotte vor dem Flüssigkeitseinlass eine Messvorrichtung mit wenigstens einer Messtrecke vorgesehen ist, in die mittels wenigstens einer Strahlungsquelle Strahlung ausgesandt, wobei mittels wenigstens einem Strahlungsempfänger die von der Flüssigkeit hindurchgelassene und/oder seitliche gestreute und/oder rückwärts gestreute Strahlungsmenge erfasst wird, und mit wenigstens einer Einheit zur Ansteuerung der wenigstens einen Strahlungsquelle und zur Auswertung des Signals des wenigstens einen Strahlungsempfängers.The invention relates to a dishwasher having a rinsing container and a circulating pump which pumps a rinsing liquor into the rinsing container through a liquid inlet, a measuring device having at least one measuring section being provided for determining the type and concentration of admixing parts in the rinsing liquor upstream of the liquid inlet Radiation is emitted by means of at least one radiation source, wherein by means of at least one radiation receiver the transmitted and / or lateral scattered and / or backward scattered radiation quantity is detected, and with at least one unit for controlling the at least one radiation source and for evaluating the signal of the at least one radiation receiver.

Bei der EP 0 716 869 A1 ist bei einem Separator zum Abscheiden von Gas aus einer Flüssigkeit wie z. B. bei der Wasseraufbereitung ein helixförmiges bzw. Spindelförmiges Rohr vorgesehen, in dessen eines Ende die Flüssigkeit eingespeist wird. Nach Durchlaufen der helixförmigen Windungen des Rohres wird Gas in einer Kammer angesammelt, die am Ausgang des helixförmigen Rohrs vorgesehen ist. Die vom Gas befreite Flüssigkeit wird anschließend in ein Messrohr eingeleitet, wo mit Hilfe eines optischen Systems die nun völlig gasfreie Flüssigkeit auf Partikel hin untersucht wird.In the EP 0 716 869 A1 is in a separator for separating gas from a liquid such. B. in the water treatment a helical or spindle-shaped tube is provided, in one end of the liquid is fed. After passing through the helical turns of the tube, gas is accumulated in a chamber provided at the exit of the helical tube. The liberated from the gas liquid is then introduced into a measuring tube, where using an optical system, the now completely gas-free liquid is examined for particles out.

Eine Vorrichtung zur Behandlung von Geschirr in Spülmaschinen ist z.B. aus der DE-A1-198 06 559 bekannt, bei der die zu untersuchende Flüssigkeit - in diesem Fall eine "Spülflotte" genannte Reinigungsflüssigkeit - in Umlauf gehalten wird, d.h. mittels einer Pumpe umgewälzt wird. Aufgrund der ermittelten Daten bezüglich Beimischungsanteilen - in diesem Falle bezüglich Verschmutzungsanteilen in der Spülflotte - werden bei der genannten Veröffentlichung Parameter für ein ablaufendes Spülprogramm eingestellt. In der Praxis hat sich gezeigt, dass in der Flüssigkeit eingeschlossene Gasblasen, die aufgrund der Bewegung der Flüssigkeit ungeregelte und nicht vorhersehbare Bewegungen durchführen, als Verschmutzungsanteile in der zu untersuchenden Flüssigkeit erkannt werden, dass also in der Flüssigkeit eingeschlossene Gasblasen eine eklatante Verfälschung des Ermittlungsergebnisses und damit des mit diesem Ergebnis gesteuerten Spülprogrammes, verursachen.A device for the treatment of dishes in dishwashers is eg from the DE-A1-198 06 559 known, in which the liquid to be examined - in this case a "rinse" cleaning liquid called - is kept in circulation, that is circulated by a pump. On the basis of the data determined with regard to admixture proportions - in this case with regard to contamination fractions in the wash liquor - parameters for a running wash program are set in the said publication. In practice, it has been found that gas bubbles trapped in the liquid, which carry out uncontrolled and unpredictable movements as a result of the movement of the liquid, are recognized as soiling components in the liquid to be examined, that is to say they are enclosed in the liquid Gas bubbles cause a blatant falsification of the result of the investigation and thus of the controlled with this result rinse program.

Der Erfindung liegt daher die Aufgabe zugrunde, bei einer Vorrichtung der eingangs genannten Art die Gefahr der Verfälschung des Ermittlungsergebnisses und damit des mit diesem Ergebnis gesteuerten Vorganges auf einfache Art und Weise zu vermeiden.The invention is therefore based on the object in a device of the type mentioned to avoid the risk of falsification of the determination result and thus the process controlled by this result in a simple manner.

Diese Aufgabe wird bei der erfindungsgemäßen Geschirrspülmaschine der eingangs genannten Art dadurch gelöst, dass die Messstrecke in einem Bereich oder am Ende einer eine kreisförmige Bewegung der Spülflotte erzeugenden Einrichtung vorgesehen ist, die Gasblasen in der Spülflotte in Richtung auf den Mittelpunkt der Kreisbewegung der Spülflotte hin nach innen an ihrer Innenwand im wesentlichen in einer Ebene getrennt von den nach außen gedrückten Beimischungsanteilen anordnet, und dass die Strahlungsquelle der Messvorrichtung Strahlung in die Spülflotte beim Durchlaufen der Messstrecke außerhalb der Ebene einstrahlt, in der sich die Gasblasen angesammelt haben.This object is achieved in the dishwasher according to the invention of the type mentioned above in that the measuring section is provided in an area or at the end of a circular movement of the washing liquor generating device, the gas bubbles in the wash liquor in the direction of the center of the circular motion of the rinse after arranged inside on its inner wall substantially in a plane separated from the depressed to the outside Beimischungsanteilen, and that the radiation source of the measuring device irradiates radiation in the wash liquor when passing through the measuring section outside the plane in which the gas bubbles have accumulated.

Durch die in der in Strömungsrichtung am Beginn der Messvorrichtung angeordneten Einrichtung zur Erzeugung einer kreisförmigen Bewegung der Flüssigkeit erzeugten kreisförmigen Bewegung der Flüssigkeit wirkt die Zentrifugalkraft auf die Flüssigkeit und auf die in der Flüssigkeit eingeschlossenen Gasblasen ebenso wie auf die in der Flüssigkeit vorhandenen Beimischungsanteile. Die schweren Beimischungsanteile werden aufgrund der höheren Fliehkräfte in der sich im Kreise bewegenden Flüssigkeit weiter nach außen bewegt als die leichteren Gasblasen. Auch verdrängen die zwangsläufig nach außen bewegten Beimischungsanteile dort befindliche Gasblasen weiter nach innen. Dadurch ordnen sich die Gasblasen im Wesentlichen in einer Ebene an, nämlich soweit als möglich nach innen, d.h. soweit als möglich in Richtung auf den Mittelpunkt der Kreisbewegung hin und es ist auf einfache Art und Weise möglich, die in die Flüssigkeit hineingestrahlte Strahlung in einen Bereich der Flüssigkeit einzustrahlen, in der sich keine Gasblasen befinden.The centrifugal force on the liquid and on the gas bubbles trapped in the liquid, as well as on the admixture components present in the liquid, acts on the circular movement of the liquid in the means for establishing a circular movement of the liquid in the direction of flow at the beginning of the measuring device. The heavy admixture components are moved further outward than the lighter gas bubbles due to the higher centrifugal forces in the liquid moving in the circle. Also displace the inevitably outwardly moving admixture shares located there gas bubbles further inward. As a result, the gas bubbles arrange substantially in one plane, namely as far as possible inwards, i. as far as possible in the direction of the center of the circular motion and it is possible in a simple manner to radiate the radiated into the liquid radiation in a region of the liquid in which there are no gas bubbles.

Die Messstrecke kann zum einen in der Einrichtung zur Erzeugung einer kreisförmigen Bewegung der Flüssigkeit angeordnet sein. Die Messstrecke ist dabei in vorteilhafter Weise in einem Bereich der eine kreisförmige Bewegung der Flüssigkeit erzeugenden Einrichtung angeordnet, in dem die Trennung der Beimischanteile schon stattgefunden hat, aber die erneute Vermischung der Beimischanteile noch nicht wieder eingetreten ist. Mit dieser Maßnahme wird eine erneute Vermischung der in der Flüssigkeit enthaltenen Beimischungsanteile und der eingeschlossenen Gasblasen vor der aufgabengemäßen Bestimmung der Art und Konzentration von Beimischungsanteilen in der Flüssigkeit sicher vermieden.The measuring section may be arranged in the device for generating a circular movement of the liquid. The measuring section is advantageously in an area of a circular movement of the liquid generating Arrangement arranged in which the separation of the admixture has already taken place, but the re-mixing of the admixing has not occurred again. With this measure, a renewed mixing of the admixture components contained in the liquid and the enclosed gas bubbles before the task-specific determination of the type and concentration of admixing components in the liquid is reliably avoided.

Zum anderen kann die Messstrecke unmittelbar am Ende der eine kreisförmige Bewegung der Flüssigkeit erzeugenden Einrichtung oder alternativ in der Einrichtung zur Erzeugung einer kreisförmigen Bewegung der Flüssigkeit im Bereich des Endes der Einrichtung angeordnet sein. Mit dieser Maßnahme wird eine erneute Vermischung der in der Flüssigkeit enthaltenen Beimischungsanteile und der eingeschlossenen Gasblasen vor der aufgabengemäßen Bestimmung der Art und Konzentration von Beimischungsanteilen in der Flüssigkeit sicher vermieden und es wird eine einfachere Montage und Zugänglichkeit der Messstrecke und der daran angeordneten wenigstens einen Stralungsquelle und wenigstens einen Strahlungsempfänger ermöglicht.On the other hand, the measuring section can be arranged directly at the end of the device generating a circular movement of the liquid, or alternatively in the device for producing a circular movement of the liquid in the region of the end of the device. With this measure, a new mixing of the admixture components contained in the liquid and the enclosed gas bubbles before the task according to the type and concentration of admixing components in the liquid safely avoided and it is easier installation and accessibility of the measuring section and arranged thereon at least one Stralungsquelle and allows at least one radiation receiver.

Die Erfindung betrifft auch ein Verfahren zur Bestimmung der Art und der Konzentration von Beimischungsanteilen in der Spülflotte eines Geschirrspülers, die mittels einer Umwälzpumpe durch einen Flüssigkeitseinlass in den Spülbehälter des Geschirrspülers gepumpt wird, mittels einer Messvorrichtung mit wenigstens einer Messstrecke vor dem Flüssigkeitseinlass, in die mittels wenigstens einer Strahlungsquelle Strahlung ausgesandt wird, und wobei mittels wenigstens einem Strahlungsempfänger die von der Flüssigkeit hindurchgelassene und/oder seitlich gestreute und/oder rückwärts gestreute Strahlungsmenge erfasst wird, und mittels wenigstens einer Einheit die wenigstens eine Strahlungsquelle angesteuert und das Signal des wenigstens einen Strahlungsempfängers abgewertet wird, welches dadurch gekennzeichnet ist, dass für die Spülflotte mittels einer Einrichtung eine kreisförmige Bewegung erzeugt wird, durch die Gasblasen in der Spülflotte in Richtung auf den Mittelpunkt der Kreisbewegung der Spülflotte hin nach innen an die Innenwand der Einrichtung im wesentlichen in einer Ebene getrennt von den nach außen gedrückten Beimischungsteilen angeordnet werden, dass von der derart getrennten Spülflotte die Messtrecke in einem Bereich oder am Ende der die kreisförmige Bewegung der Spülflotte erzeugenden Einrichtung durchlaufen wird, und dass von der Strahlungsquelle der Messvorrichtung ausgesandte Strahlung in die Spülflotte beim Durchlaufen der Messstrecke außerhalb der Ebene, in der sich die Gasblasen angesammelt haben, eingestrahlt wird.The invention also relates to a method for determining the type and concentration of admixture components in the wash liquor of a dishwasher, which is pumped by a circulation pump through a liquid inlet into the washing container of the dishwasher, by means of a measuring device with at least one measuring section in front of the liquid inlet into which At least one radiation source radiation is emitted, and wherein by means of at least one radiation receiver the transmitted and / or laterally scattered and / or backward scattered radiation quantity is detected by means of at least one unit, the at least one radiation source and the signal of at least one radiation receiver devalued is, which is characterized in that for the rinsing liquor by means of a device, a circular movement is generated by the gas bubbles in the rinsing liquor in the direction of the center of the K travel movement of the rinsing liquor inwardly to the inner wall of the device are arranged substantially in a plane separate from the outwardly pressed admixture parts, that is traversed by the so separated rinsing the measuring section in an area or at the end of the circular movement of the rinsing liquor generating device , and that emitted by the radiation source of the measuring device radiation in the Rinse liquor when passing through the measuring section outside the plane in which the gas bubbles have accumulated, is irradiated.

Durch die gezielte Anordnung der Gasblasen ist es bei dem erfindungsgemäßen Verfahren möglich, die in die Flüssigkeit hinein gestrahlte Strahlung in einem Bereich der Flüssigkeit einzustrahlen, in der sich keine Gasblasen befinden. Mit der Erfindung ist es bei einem Verfahren der eingangs genannten Art auf einfache Art und Weise gelungen, die Gefahr der Vermischung des Ermittlungsergebnisses und damit des mit diesem Ergebnis gesteuerten Vorganges zu vermeiden.By the targeted arrangement of the gas bubbles, it is possible in the method according to the invention to irradiate the radiation radiated into the liquid in a region of the liquid in which there are no gas bubbles. With the invention, in a method of the type mentioned in a simple manner, the risk of mixing the result of the determination and thus of the process controlled by this result is avoided.

Nach einem Merkmal der Erfindung wird die Flüssigkeit in eine Kreisbewegung, insbesondere eine schnelle Kreisbewegung, versetzt. Durch die Drehbewegung der Flüssigkeit wirkt die Zentrifugalkraft auf die Flüssigkeit und auf die in der Flüssigkeit eingeschlossenen Gasblasen ebenso wie auf die in der Flüssigkeit vorhandenen Beimischungsanteile. Die schweren Beimischungsanteile werden aufgrund der höheren Fliehkräfte in der sich im Kreise bewegenden Flüssigkeit weiter nach außen bewegt als die leichteren Gasblasen. Auch verdrängen die zwangsläufig nach außen bewegten Beimischungsanteile dort befindliche Gasblasen weiter nach innen. Dadurch ordnen sich die Gasblasen entsprechend dem erfindungsgemäßen Verfahren im wesentlichen in einer Ebene an, nämlich soweit als möglich nach innen, d.h. soweit als möglich in Richtung auf den Mittelpunkt der Kreisbewegung hin und es ist auf einfache Art und Weise möglich, die in die Flüssigkeit hinein gestrahlte Strahlung in einen Bereich der Flüssigkeit einzustrahlen, in der sich keine Gasblasen befinden.According to a feature of the invention, the liquid is placed in a circular motion, in particular a rapid circular movement. Due to the rotational movement of the liquid, the centrifugal force acts on the liquid and on the gas bubbles trapped in the liquid as well as on the admixture components present in the liquid. The heavy admixture components are moved further outward than the lighter gas bubbles due to the higher centrifugal forces in the liquid moving in the circle. Also displace the inevitably outwardly moving admixture shares located there gas bubbles further inward. As a result, the gas bubbles according to the method according to the invention arrange substantially in one plane, namely as far in as possible inwards, i. as far as possible in the direction of the center of the circular motion and it is possible in a simple manner to irradiate the radiated into the liquid radiation in a region of the liquid in which there are no gas bubbles.

Nach einer vorteilhaften Ausführungsform der Erfindung ist der Flüssigkeitseintritt der Messvorrichtung mit der die kreisförmige Bewegung der Spülflotte erzeugenden Einrichtung ausgestattet. Diese ist insbesondere als ein Hohlkörper mit kreisförmigem Querschnitt, vorteilhafterweise als ein wendelförmg ausgebildeter Hohlkörper, bevorzugt als ein spiralförmig ausgebildeter Hohlkörper ausgebildet. Dies sind sehr einfache Möglichkeiten die kreisförmige Bewegung der Flüssigkeit nach dem erfindungsgemäßen Verfahren zu erzeugen, wobei der spiralförmig ausgebildete Hohlkörper zusätzlich noch aufgrund seiner im Wesentlichen nur horizontalen Ausdehnung eine sehr platzsparende Möglichkeit ist.According to an advantageous embodiment of the invention, the liquid inlet of the measuring device is equipped with the device which generates the circular movement of the rinsing liquor. This is in particular designed as a hollow body with a circular cross section, advantageously as a helically formed hollow body, preferably as a spirally formed hollow body. These are very simple ways to produce the circular movement of the liquid by the method according to the invention, wherein the spiral-shaped hollow body is additionally due to its substantially horizontal extent only a very space-saving possibility.

Eine ausreichende Geschwindigkeit der Kreisbewegung der Flüssigkeit wird bei dem spiralförmig ausgebildeten Hohlkörper bevorzugt dadurch erreicht, dass die Flüssigkeit am äußeren Umfang des spiralförmig ausgebildeten Hohlkörpers eingeleitet und am innersten Umfang des spiralförmig ausgebildeten Hohlkörpers ausgeleitet wird.A sufficient speed of the circular movement of the liquid is preferably achieved in the spirally formed hollow body in that the liquid is introduced at the outer periphery of the spirally formed hollow body and discharged at the innermost periphery of the spirally formed hollow body.

Vorteilhafterweise ist der Hohlkörper ein Schlauch, alternativ kann der Hohlkörper auch ein Rohr oder ein einstückig hergestelltes Teil mit entsprechend gestalteten Durchgängen sein.Advantageously, the hollow body is a hose, alternatively, the hollow body may also be a pipe or an integrally manufactured part with correspondingly shaped passages.

Nach einer vorteilhaften Ausführungsform der Erfindung ist der Hohlkörper ein Pumpengehäuse einer Pumpe. Bei dieser Ausführungsform der Erfindung kann, da das Pumpengehäuse einer Pumpe üblicherweise eine spiralförmige Flüssigkeitsführung aufweist, ein ohnehin beim Einsatz des erfindungsgemäßen Verfahrens und der erfindungsgemäßen Vorrichtung vorhandenes Bauteil verwendet werden.According to an advantageous embodiment of the invention, the hollow body is a pump housing of a pump. In this embodiment of the invention, since the pump housing of a pump usually has a spiral-shaped liquid guide, a component which is present anyway when using the method according to the invention and the device according to the invention can be used.

Eine ausreichende Geschwindigkeit der Kreisbewegung der Flüssigkeit wird bei der Verwendung eines Pumpengehäuses einer Pumpe als Hohlkörper dadurch gesichert, dass der Hohlkörper ein Pumpengehäuse einer Pumpe fortgesetzt durch einen kreisförmig ausgebildeten Hohlkörper ist.A sufficient speed of the circular movement of the liquid is thereby secured when using a pump housing of a pump as a hollow body in that the hollow body is a pump housing of a pump continued through a circular shaped hollow body.

Bevorzugt ist die erfindungsgemäße Vorrichtung in Geschirrspülmaschinen zur Ermittlung als Beimischungsanteile z. B. der Art und die Konzentration von Verschmutzungsund/oder Reinigungsmittelanteilen in der Spülflotte angeordnet, wodurch das Spülprogramm gesteuert werden kann.Preferably, the device according to the invention in dishwashers for determining as admixture shares z. As the nature and concentration of contaminants and / or detergent components in the rinsing liquor, whereby the washing program can be controlled.

Bei der Verwendung der erfindungsgemäßen Vorrichtung bei Geschirrspülmaschinen wird eine sichere Funktion dadurch gewährleistet, dass sie in Strömungsrichtung nach einer Umwälzpumpe und vor dem Flüssigkeitseinlass in einen Spülbehälter angeordnet ist.When using the device according to the invention in dishwashers a safe function is ensured by the fact that it is arranged in the flow direction after a circulation pump and before the liquid inlet into a washing.

Die Erfindung wird nachstehend anhand den in der Zeichnung dargestellten Ausführungsbeispielen bei einer Geschirrspülmaschine erläutert. Es zeigen

Fig. 1
eine schematisch dargestellte Geschirrspülmaschine im Längsschnitt,
Fig. 2
eine schematisch dargestellte vorteilhafte Ausführungsform der erfindungsgemäßen Vorrichtung zur Ermittlung der Art und der Konzentration von Beimischungsanteilen in einer Flüssigkeit,
Fig. 3
eine schematisch dargestellte bevorzugte Ausführungsform der erfindungsgemäßen Vorrichtung zur Ermittlung der Art und der Konzentration von Beimischungsanteilen in einer Flüssigkeit,
Fig. 4
eine schematisch dargestellte weitere vorteilhafte Ausführungsform der erfindungsgemäßen Vorrichtung zur Ermittlung der Art und der Konzentration von Beimischungsanteilen in einer Flüssigkeit und
Fig. 5
eine vergrößerte Ansicht eines Bereichs der erfindungsgemäßen Vorrichtung zur Ermittlung der Art und der Konzentration von Beimischungsanteilen in einer Flüssigkeit.
The invention will be explained below with reference to the embodiments illustrated in the drawings in a dishwasher. Show it
Fig. 1
a dishwasher shown schematically in longitudinal section,
Fig. 2
a schematically illustrated advantageous embodiment of the device according to the invention for determining the type and concentration of admixture components in a liquid,
Fig. 3
a schematically illustrated preferred embodiment of the device according to the invention for determining the type and concentration of admixture components in a liquid,
Fig. 4
a schematically illustrated further advantageous embodiment of the device according to the invention for determining the type and concentration of admixture components in a liquid and
Fig. 5
an enlarged view of a portion of the inventive device for determining the type and concentration of admixture shares in a liquid.

Das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung zur Bestimmung der Art und Konzentration von Beimischungsanteilen in einer Flüssigkeit wird anhand Ausführungsbeispielen bei einer Geschirrspülmaschine erläutert.The method according to the invention and the device according to the invention for determining the type and concentration of admixture proportions in a liquid will be explained with reference to exemplary embodiments in a dishwasher.

Fig. 1 zeigt zur allgemeinen Erläuterung eine schematisch dargestellte, nicht näher beschriebene Geschirrspülmaschine im Längsschnitt. Ein Spülbehälter 1 der Geschirrspülmaschine ist zum Be- und Entladen eines oberen bzw. eines unteren Geschirrkorbes 2, 3 über eine frontseitige Tür 4 zugängig. Bei den Ausführungsbeispielen wird zum Spulen des Geschirrs eine Spülflotte genannte Reinigungsflüssigkeit mittels einer Umwälzpumpe 5 durch ein Steigrohr 6 zu zwei drehbaren Sprüharmen 7, 8 gepumpt, die unterhalb des jeweiligen Geschirrkorbes 2, 3 angeordnet sind. Bei allen weiter unten erläuterten Ausführungsbeispielen ist die in Fig. 1 nur angedeutete erfindungsgemäße Vorrichtung 10, 10', 10" zur Ermittlung der Art und der Konzentration von Beimischungsanteilen in einer Flüssigkeit - in den Ausführungsbeispielen von Verschmutzungsanteilen in der Spülflotte -, mit wenigstens einer von der Flüssigkeit - der Spülflotte - durchströmten Meßstrecke 13, 13', 13", in die mittels wenigstens einer nicht näher beschriebenen Strahlungsquelle Strahlung ausgesandt wird, wobei mittels wenigstens einem nicht näher beschriebenen Strahlungsempfänger die von der Flüssigkeit hindurchgelassene und/oder seitlich gestreute und/oder rückwärts gestreute Strahlungsmenge erfaßt wird, ausgestattet. Das Spülprogramm wird durch Einstellung von Parametern mittels einer nicht gezeigten Einheit zur Ansteuerung der wenigstens einen Strahlungsquelle und zur Auswertung des Signals des wenigstens einen Strahlungsempfängers, die Bestandteil der erfindungsgemäßen Vorrichtung 10, 10', 10" und in den Ausführungsbeispielen Teil einer nicht dargestellten Programmsteuereinheit ist, gesteuert. Eine sichere Funktion der erfindungsgemäßen Vorrichtung 10, 10', 10" wird dadurch gewährleistet, daß sie bei allen erläuterten Ausführungsbeispielen in Strömungsrichtung - mit Pfeilen angedeutet - nach der Umwälzpumpe 5 und vor dem Flüssigkeitseinlaß in den Spülbehälter 1, in den Ausführungsbeispielen vor dem Steigrohr 6, angeordnet ist. Fig. 1 shows a general illustration of a schematically illustrated, unspecified dishwashing machine in longitudinal section. A washing container 1 of the dishwasher is accessible for loading and unloading an upper or a lower dish rack 2, 3 via a front door 4. In the embodiments, a rinsing liquor called cleaning liquid is pumped by means of a circulating pump 5 through a riser 6 to two rotatable spray arms 7, 8, which are arranged below the respective dish rack 2, 3 for winding the dishes. In all embodiments explained below, the in Fig. 1 only indicated device 10, 10 ', 10 "according to the invention for determining the type and concentration of admixing fractions in a liquid - in the embodiments of contamination fractions in the wash liquor -, with at least one of the liquid - the wash liquor - flowed through measuring section 13, 13' , 13 ", in the Radiation is emitted by means of at least one radiation source not described in more detail, wherein by means of at least one radiation receiver not described in detail, the transmitted and / or laterally scattered and / or backscattered radiation quantity is detected. The wash program is by setting parameters by means not shown unit for controlling the at least one radiation source and for evaluating the signal of the at least one radiation receiver, which is part of the inventive device 10, 10 ', 10 "and in the embodiments part of a program control unit, not shown A safe function of the device 10, 10 ', 10 "according to the invention is ensured by the fact that they in all the illustrated embodiments in the flow direction - indicated by arrows - after the circulation pump 5 and before the liquid inlet into the washing 1, in the embodiments before the riser 6, is arranged.

In der Praxis hat sich gezeigt, daß in der Spütflotte eingeschlossene Gasblasen, die aufgrund der Bewegung der Spülflotte ungeregelte und nicht vorhersehbare Bewegungen durchführen, alsVerschmutzungsanteile in der zu untersuchenden Spülflotte erkannt werden, daß also in der Spülflotte eingeschlossene Gasblasen eine eklatante Verfälschung des Ermittlungsergebnisses und damit des mit diesem Ergebnis gesteuerten Spülprogrammes, verursachen. Diese Gefahr der Verfälschung des Ermittlungsergebnisses und damit des mit diesem Ergebnis gesteuerten Spülprogrammes wird auf einfache Art und Weise mit dem erfindungsgemäßen Verfahren und der erfindungsgemäßen Vorrichtung 10, 10', 10" vermieden, wie in den folgenden Ausführungsbeispielen gezeigt und erläutert wird.In practice, it has been shown that trapped in the Spütflotte gas bubbles that perform uncontrolled and unpredictable movements due to the movement of the rinsing, are recognized as dirt particles in the rinse water to be examined, so that enclosed in the rinse liquor gas bubbles a blatant falsification of the detection result and thus of the wash program controlled with this result. This risk of falsification of the determination result and thus of the rinse program controlled with this result is avoided in a simple manner with the method according to the invention and the device 10, 10 ', 10 "according to the invention, as shown and explained in the following exemplary embodiments.

Allen Ausführungsbeispielen gemeinsam ist, daß nach dem erfindungsgemäßen Verfahren in der Spülflotte eingeschlossene Gasblasen so beeinflußt werden, daß sie sich im wesentlichen in einer Ebene anordnen. Dies wird bei den gezeigten und erläuterten Ausführungsbeispielen dadurch erreicht, daß die Spülflotte in eine schnelle Kreisbewegung versetzt wird. Durch die schnelle Drehbewegung der Spülflotte wirkt die Zentrifugalkraft auf die Spülflotte und auf die in der Spülflotte eingeschlossenen Gasblasen ebenso wie auf die in der Spülflotte vorhandenen Verschmutzungsanteile. Die schweren Verschmutzungsanteile werden aufgrund der höheren Fliehkräfte in der sich im Kreise bewegenden Spülflotte weiter nach außen bewegt als die leichteren Gasblasen. Auch verdrängen die zwangsläufig nach außen bewegten Verschmutzungsanteile dort befindliche Gasblasen weiter nach innen. Dadurch ordnen sich die Gasblasen im wesentlichen in einer Ebene an, nämlich soweit als möglich nach innen, d.h. soweit als möglich in Richtung auf den Mittelpunkt der Kreisbewegung hin. Durch die gezielte Anordnung der Gasblasen ist es auf einfache Art und Weise möglich, die in die Spülflotte hineingestrahlte Strahlung in einem Bereich der Spülflotte einzustrahlen, in der sich keine Gasblasen befinden.It is common to all embodiments that gas bubbles trapped in the rinsing liquor by the process according to the invention are influenced in such a way that they are arranged essentially in one plane. This is achieved in the embodiments shown and explained by the fact that the rinsing liquor is set in a rapid circular motion. Due to the fast rotational movement of the wash liquor, the centrifugal force acts on the wash liquor and on the gas bubbles trapped in the wash liquor, as well as on the contamination fractions present in the wash liquor. The heavy pollution components are moved further outward than the lighter gas bubbles due to the higher centrifugal forces in the rinsing fluid moving in circles. They are also inevitably displacing outside moved pollution shares located there gas bubbles further inside. As a result, the gas bubbles arrange substantially in one plane, namely as far as possible inward, ie as far as possible in the direction of the center of the circular motion. The targeted arrangement of the gas bubbles makes it possible in a simple manner to irradiate the radiation radiated into the rinsing liquor in a region of the rinsing liquor in which there are no gas bubbles.

Zur Durchführung des erfindungsgemäßen Verfahrens ist bei allen Ausführungsbeispielen erfindungsgemäß ein Flüssigkeitseintritt 11, 11', 11" der Vorrichtung 10, 10', 10" mit einer Einrichtung 12, 12', 12" zur Erzeugung einer kreisförmigen Bewegung der Spülflotte ausgestattet. Weiterhin gemeinsam ist allen Ausführungsbeispielen, daß die Meßstrecke 13, 13', 13" unmittelbar am Ende der Einrichtung 12, 12', 12" zur Erzeugung einer kreisförmigen Bewegung der Spülflotte angeordnet ist. Alternativ könnte die Meßstrecke auch in der Einrichtung zur Erzeugung einer kreisförmiger Bewegung der Spülflotte, und zwar in einem Bereich der Einrichtung in dem die Trennung der Beimischanteile schon stattgefunden hat aber die erneute Vermischung der Beimischanteile noch nicht wieder eingetreten ist, angeordnet sein. Damit wird eine erneute Vermischung der in der Spülflotte enthaltenen Verschmutzungsanteile und der eingeschlossenen Gasblasen vor der Bestimmung der Art und Konzentration von Verschmutzungsanteilen in der Spülflotte sicher vermieden. Ferner ist allen gezeigten Ausführungsformen gemeinsam, daß der Flüssigkeitseintritt 11, 11', 11" der Vorrichtung 10, 10`, 10" ein Hohlkörper mit kreisförmigem Querschnitt ist.For carrying out the method according to the invention, in all exemplary embodiments a liquid inlet 11, 11 ', 11 "of the device 10, 10', 10" is equipped with a device 12, 12 ', 12 "for producing a circular movement of the rinsing liquor In all exemplary embodiments, the measuring section 13, 13 ', 13 "is arranged directly at the end of the device 12, 12', 12" for generating a circular movement of the rinsing fluid Alternatively, the measuring section could also be in the device for generating a circular movement of the rinsing fluid in a region of the device in which the separation of the admixture parts has already taken place but the remixing of the admixing parts has not yet re-occurred, thus arranging a renewed mixing of the impurities in the flushing solution and the enclosed gas bubbles before the determination the type and concentration of n contamination components safely avoided in the wash liquor. Furthermore, it is common to all embodiments shown that the liquid inlet 11, 11 ', 11 "of the device 10, 10, 10" is a hollow body with a circular cross-section.

In Fig. 2 wird eine vorteilhafte Ausführungsform der Erfindung gezeigt, in der die Einrichtung 12 zur Erzeugung einer kreisförmigen Bewegung der Spülflotte als ein wendelförmig ausgebildeter Hohlkörper gestaltet ist. In dem in Fig. 2 gezeigten Ausführungsbeispiel wird als Hohlkörper ein Rohr verwendet, alternativ könnte auch ein Schlauch oder ein einstückig hergestelltes Teil mit entsprechend gestalteten Durchgängen Verwendung finden. In der Praxis hat sich gezeigt, daß eine ausreichende Geschwindigkeit der Kreisbewegung der Spülflotte ab drei besser vier Windungen erreicht wird. Dies ist eine sehr einfache Möglichkeit die kreisförmige Bewegung der Spülflotte nach dem erfindungsgemäßen Verfahren zu erzeugen.In Fig. 2 an advantageous embodiment of the invention is shown, in which the means 12 for generating a circular movement of the rinsing liquor is designed as a helically formed hollow body. In the in Fig. 2 shown embodiment, a tube is used as a hollow body, alternatively, a hose or an integrally manufactured part could be used with correspondingly shaped passages. In practice, it has been shown that a sufficient speed of the circular motion of the rinsing liquor from three better four turns is achieved. This is a very easy way to produce the circular movement of the rinsing liquor by the method according to the invention.

In Fig. 3 wird die bevorzugte Ausführungsform der Erfindung gezeigt, in der die Einrichtung 12' zur Erzeugung einer kreisförmigen Bewegung der Spülflotte als ein spiralförmig ausgebildeter Hohlkörper gestaltet ist. Auch im in Fig. 3 gezeigten Ausführungsbeispiel wird als Hohlkörper ein Rohr verwendet, alternativ könnte auch ein Schlauch oder ein einstückig hergestelltes Teil mit entsprechend gestalteten Durchgängen Verwendung finden. Eine ausreichende Geschwindigkeit der Kreisbewegung der Spülflotte wird bei dem spiralförmig ausgebildeten Hohlkörper bevorzugt dadurch erreicht, daß die Spütflotte am äußeren Umfang des spiralförmig ausgebildeten Hohlkörpers eingeleitet und am innersten Umfang des spiralförmig ausgebildeten Hohlkörpers zur Meßstrecke 13' ausgeleitet wird.In der Praxis hat sich gezeigt, daß eine ausreichende Geschwindigkeit der Kreisbewegung der Spülflotte ab zwei besser drei Windungen erreicht wird. Dies ist ebenfalls eine sehr einfache Möglichkeit die kreisförmige Bewegung der Spülflotte nach dem erfindungsgemäßen Verfahren zu erzeugen, wobei der spiralförmig ausgebildete Hohlkörper aufgrund seiner im wesentlichen nur horizontalen Ausdehnung zusätzlich noch äußerst platzsparend ist.In Fig. 3 shows the preferred embodiment of the invention, in which the means 12 'for generating a circular movement of the rinsing liquor is designed as a spirally formed hollow body. Also in the Fig. 3 shown embodiment, a tube is used as a hollow body, alternatively, a hose or an integrally manufactured part could be used with correspondingly shaped passages. A sufficient speed of the circular motion of the rinsing liquor is preferably achieved in the spirally formed hollow body in that the Spütflotte is introduced at the outer periphery of the spirally formed hollow body and at the innermost circumference of the spirally formed hollow body to the measuring section 13 'is discharged. In practice, it has been shown that a sufficient speed of the circular motion of the wash liquor from two better three turns is achieved. This is also a very easy way to produce the circular motion of the rinsing liquor by the method according to the invention, wherein the spiral-shaped hollow body is due to its substantially horizontal extent only additionally extremely space-saving.

In Fig. 4 wird eine weitere vorteilhafte Ausführungsform der Erfindung gezeigt, in der die Ein richtung 12" zur Erzeugung einer kreisförmigen Bewegung der Spülflotte ein Pumpengehäuse 9 der Umwälzpumpe 5 ist. Eine ausreichende Geschwindigkeit der Kreisbewegung der Flüssigkeit wird bei der Verwendung des Pumpengehäuse 9 der Umwälzpumpe 5 dadurch gesichert, daß dieses durch einen kreisförmig ausgebildeten Hohlkörper 14", der wieder als Rohr ausgebildet ist, alternativ könnte auch ein Schlauch oder ein einstückig hergestelltes Teil mit entsprechend gestalteten Durchgängen Verwendung finden, fortgesetzt ist. Da das Pumpengehäuse 9 einer Pumpe und damit auch der Umwälzpumpe 5 einer Geschirrspülmaschine üblicherweise eine spiralförmige Flüssigkeitsführung aufweist, kann vorteilhafterweise bei dieser Ausführungsform der Erfindung ein beim Einsatz des erfindungsgemäßen Verfahrens und der erfindungsgemäßen Vorrichtung 10" ohnehin vorhandenes Bauteil verwendet werden.In Fig. 4 A further advantageous embodiment of the invention is shown, in which the device 12 "for generating a circular movement of the rinsing fluid is a pump housing 9 of the circulating pump 5. A sufficient speed of the circular movement of the fluid is thereby ensured when using the pump housing 9 of the circulating pump 5 that this is continued by a circular shaped hollow body 14 ", which is again formed as a tube, alternatively could also be a hose or an integrally manufactured part with correspondingly shaped passages use continued. Since the pump housing 9 of a pump and thus also of the circulation pump 5 of a dishwasher usually has a helical liquid guide, a component which is present anyway when using the method according to the invention and the device 10 "according to the invention can advantageously be used in this embodiment of the invention.

In Fig. 5 wird eine vergrößerte Ansicht des Ausgangsbereiches der Einrichtung 12, 12', 12" zur Erzeugung einer kreisförmigen Bewegung der Flüssigkeit der erfindungsgemäßen Vorrichtung 10, 10', 10" zur Ermittlung der Art und der Konzentration von Verschmutzungsanteilen in der Spülflotte im Schnitt gezeigt, um das erfindungsgemäße Verfahren zur Bestimmung der Art und Konzentration von Beimischungsanteilen in einer Flüssigkeit - in den Ausführungsbeispielen zur Ermittlung der Art und der Konzentration von Verschmutzungsanteilen in der Spülflotte und die Funktion der erfindungsgemäßen Vorrichtung 10, 10', 10" nochmals zu erläutern. Wie oben schon beschrieben, ist allen Ausführungsbeispielen gemeinsam, daß die Meßstrecke 13, 13', 13" unmittelbar am Ende der Einrichtung 12, 12`, 12" zur Erzeugung einer kreisförmigen Bewegung der Spülflotte angeordnet ist. Dieses Ende des als Hohlkörper gestalteten Flüssigkeitseintritts 11, 11', 11" und des Hohlkörpers 14" der Ausführung nach Fig. 4, das das Ende der Einrichtung 12, 12', 12" zur Erzeugung einer kreisförmigen Bewegung der Spülflotte darstellt, ist der in Fig. 5 dargestellte Bereich der erfindungsgemäßen Vorrichtung 10, 10', 10". Mit großen, dunklen Punkten sind die in der Spülflotte eingeschlossenen Gasblasen B angedeutet, mit kleinen Punkten die in der Spülflotte enthaltenen Beimischungsanteile A - in den gezeigten Ausführungsbeispielen die enthaltenen Verschmutzungsanteile. Die Spülflotte durchströmt die Vorrichtung 10, 10', 10", soweit sie zu sehen ist, hauptsächlich von links nach rechts. Die Strömungsrichtung ist mit Pfeilen angedeutet. Es ist deutlich zu erkennen, wie in der letzten Biegung der Einrichtung 2, 12', 12" zur Erzeugung einer kreisförmigen Bewegung der Spülflotte die Gasblasen B sich soweit als möglich in Richtung auf den Mittelpunkt der Kreisbewegung hin, d.h. an der Innenwand des als Hohlkörper ausgebildeten Flüssigkeitseinlaufes 11, 11', 11" bzw. des kreisförmigen Hohlkörpers 14" anordnen und die Verschmutzungsanteile A je nach Größe mehr oder weniger nach außen gedrückt werden. So getrennt durchläuft die Spülflotte nun die Meßstrecke 13, 13', 13", in der, wie mittels eines strichpunktierten Kreises angedeutet, die wenigstens eine nicht näher beschriebene Strahlungsquelle und der wenigstens eine nicht näher beschriebene Strahlungsempfänger außerhalb der Ebene, in der die Gasblasen B sich angesammelt haben, angeordnet sind. Danach verläßt die Spülflotte über das Steigrohr 6 die erfindungsgemäße Vorrichtung 10, 10', 10". Hierbei ist schon wieder die sich erneut einstellende Vermischung der Gasblasen B und der Verschmutzungsanteile A in der Spülflotte feststellbar.In Fig. 5 FIG. 12 is an enlarged view of the exit region of the device 12, 12 ', 12 "for producing a circular movement of the liquid of the device 10, 10', 10" according to the invention for determining the type and concentration of contaminants in the wash liquor, in section inventive method for determination the nature and concentration of admixing components in a liquid - in the exemplary embodiments for determining the type and concentration of contaminants in the wash liquor and the function of the device 10, 10 ', 10 "according to the invention together that the measuring section 13, 13 ', 13 "is arranged directly at the end of the device 12, 12', 12" for producing a circular movement of the rinsing liquor Hollow body 14 "of the embodiment according to Fig. 4 , which represents the end of the device 12, 12 ', 12 "for producing a circular movement of the rinsing liquor, is the in Fig. 5 The area of the device 10, 10 ', 10 "according to the invention is indicated by large, dark dots, the small parts of which contain the admixture portions A contained in the wash liquor, in the exemplary embodiments shown the contaminant fractions contained in the wash liquor the device 10, 10 ', 10 ", as far as it can be seen, mainly from left to right. The direction of flow is indicated by arrows. It can be clearly seen, as in the last bend of the device 2, 12 ', 12 "for generating a circular movement of the rinsing liquor, the gas bubbles B as far as possible towards the center of the circular motion, ie on the inner wall of the hollow body arranged liquid inlet 11, 11 ', 11 "or the circular hollow body 14" and the fouling portions A are pressed more or less outward depending on size. So separated the rinse liquor now passes through the measuring section 13, 13', 13 ", in the , as indicated by a dot-dashed circle, the at least one unspecified radiation source and the at least one unspecified radiation receiver outside the plane in which the gas bubbles B have accumulated, are arranged. Thereafter, the rinsing liquor leaves the device 10, 10 ', 10 "according to the invention via the riser 6. Here again, the mixing of the gas bubbles B and the pollutants A in the rinsing liquor is again detectable.

Mit dem erfindungsgemäßen Verfahren und der erfindungsgemäßen Vorrichtung ist es auf einfache Art und Weise gelungen, die Gefahr der Verfälschung des Ermittlungsergebnisses und damit des mit diesem Ergebnis gesteuerten Vorganges zu vermeiden.With the method according to the invention and the device according to the invention, it has been possible in a simple manner to avoid the risk of falsification of the result of the determination and thus of the process controlled with this result.

Claims (13)

  1. Dishwasher with a rinsing container (1) and a circulating pump (5), which pumps a rinsing solution through a liquid inlet (6) into the rinsing container (1), wherein for determination of the kind and concentration of admixture components in the rinsing solution there is provided ahead of the liquid inlet (6) a measuring device (10, 10', 10") with at least one measuring path (13, 13', 13") in which at least one radiation source emits radiation, wherein the amount of radiation let through and/or scattered laterally and/or scattered rearwardly by the liquid is detected by means of at least one radiation receiver, and with at least one unit for drive control of the at least one radiation source and for evaluation of the signal of the at least one radiation receiver, characterised in that the measuring path (13, 13', 13") is provided in a region or at an end of a device (12, 12', 12"), which produces a circular motion of the rinsing solution and which orients gas bubbles (B) in the rinsing solution in direction towards the centre point of the circular motion of the rinsing solution inwardly at its inner wall substantially in a plane separated from the admixture components (A) urged outwardly, and that the radiation source from the measuring device (10, 10', 10") radiates radiation into the rinsing solution during transit of the measuring path (13, 13', 13") outside the plane in which the gas bubbles (B) have collected.
  2. Dishwasher according to claim 1, characterised in that the liquid inlet (11, 11', 11") of the measuring device (10, 10', 10") is equipped with the device (12, 12', 12") producing the circular motion of the rinsing solution.
  3. Dishwasher according to claim 1 or 2, characterised in that the device (12, 12', 12") producing a circular motion of the rinsing solution is a hollow body with a circular cross-section.
  4. Dishwasher according to claim 3, characterised in that the hollow body (12) is of helical construction.
  5. Dishwasher according to claim 3, characterised in that the hollow body (12) is of spiral construction.
  6. Dishwasher according to claim 5, characterised in that the rinsing solution is introduced at the outer circumference of the hollow body (12) of spiral construction and is conducted away at the innermost circumference of the hollow body of spiral construction.
  7. Dishwasher according to any one of claims 3 to 6, characterised in that the hollow body is a hose.
  8. Dishwasher according to any one of claims 3 to 6, characterised in that the hollow body is a pipe.
  9. Dishwasher according to any one of claims 3 to 6, characterised in that the hollow body is a pump housing (9) of a pump (5).
  10. Dishwasher according to claim 9, characterised in that the hollow body is a pump housing (9) of a pump (5) continued by a hollow body (14") of circular construction.
  11. Dishwasher according to any one of the preceding claims, characterised in that a riser (6) is provided as liquid inlet.
  12. Dishwasher according to any one of the preceding claims, characterised in that the measuring device (10, 10', 10") and the device (12, 12', 12") producing the circular motion of the rinsing solution are arranged in flow direction after the circulating pump (5) and ahead of the liquid inlet (6).
  13. Method of determining the kind and concentration of admixture components in the rinsing solution of a dishwasher - which solution is pumped by way of a circulating pump (5) through a liquid inlet (6) into the rinsing container (1) of the dishwasher - by means of a measuring device (10, 10', 10") with at least one measuring path (13, 13', 13") ahead of the liquid inlet (6), in which radiation is emitted by means of at least one radiation source, and wherein the amount of radiation let through and/or laterally scattered and/or rearwardly scattered by the liquid is determined by means of at least one radiation receiver, and the at least one radiation source is controlled in drive by at least one unit and the signal of the at least one radiation receiver is evaluated, particularly according to any one of the preceding claims, characterised in that for the rinsing solution a circular motion, by which the gas bubbles (B) in the rinsing solution are oriented in direction towards the centre point of the circular motion of the rinsing solution inwardly at the inner wall of the device substantially in a plane separated from the admixture components (A) urged outwardly, is produced by means of a device, that the measuring path (13, 13', 13") is transited by the rinsing solution, which is separated in that manner, in a region or at the end of the device (12, 12', 12") producing the circular motion of the rinsing solution, and that radiation, which is emitted by the radiation source of the measuring device (10, 10', 10"), is radiated into the rinsing solution during transit of the measuring path (13, 13', 13") outside the plane in which the gas bubbles (B) have collected.
EP00121978A 1999-10-15 2000-10-09 Dishwasher and method for determining the type and concentration of mixtures in a liquid Expired - Lifetime EP1092384B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19949801 1999-10-15
DE19949801A DE19949801A1 (en) 1999-10-15 1999-10-15 Method and device for determining the type and concentration of admixtures in a liquid

Publications (3)

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EP1092384A2 EP1092384A2 (en) 2001-04-18
EP1092384A3 EP1092384A3 (en) 2001-10-10
EP1092384B1 true EP1092384B1 (en) 2009-08-05

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AT (1) ATE438333T1 (en)
DE (2) DE19949801A1 (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10059112C1 (en) * 2000-11-28 2002-05-08 Miele & Cie Electric dishwashing machine has turbidity sensor measuring zone provided with gradually increasing flow cross-section for preventing collection of foam or air bubbles
DE10145601A1 (en) * 2001-04-27 2002-10-31 Aweco Appliance Sys Gmbh & Co Domestic dish or clothes washing machine includes sensor detecting form or type of rinse agent employed
DE10319467B3 (en) 2003-04-29 2004-07-22 Miele & Cie. Kg Device for preventing foam or air bubbles in measuring zone of turbidity sensor for dishwasher or laundry machine with turbulence region incorporated in bypass line across main flow line
DE102005012519A1 (en) * 2005-03-16 2006-09-21 Aweco Appliance Systems Gmbh & Co. Kg A method for extracting gases dissolved in the cleaning solution of clothes or dish washing machines with recirculating circuits has a pump with a heating element within the housing and a gas ventilation valve
DE102017123048A1 (en) 2016-10-19 2018-04-19 Miele & Cie. Kg Dishwasher, in particular household dishwasher
US11225746B2 (en) 2018-08-27 2022-01-18 Ecolab Usa Inc. System and technique for extracting particulate-containing liquid samples without filtration

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Publication number Priority date Publication date Assignee Title
DE2548440C3 (en) * 1975-10-29 1980-01-24 Gesellschaft Fuer Strahlen- Und Umweltforschung Mbh, 8000 Muenchen Arrangement for continuous measurement of the turbidity of bacterial cultures
GB2055634B (en) * 1979-08-16 1983-01-26 Ishikawajima Harima Heavy Ind Gas-liquid separators
JPH08117506A (en) * 1994-10-27 1996-05-14 Mikuni Kikai Kk Gas-liquid separating apparatus and fine particle monitor provided therewith
DE19705927A1 (en) * 1997-02-17 1998-08-20 Aeg Hausgeraete Gmbh Dishwasher with a device for determining the degree of contamination of a washing liquid
DE19806559B4 (en) 1998-02-17 2015-10-29 BSH Hausgeräte GmbH Method and device for treating dishes in dishwashers

Also Published As

Publication number Publication date
ES2329436T3 (en) 2009-11-26
EP1092384A2 (en) 2001-04-18
DE50015703D1 (en) 2009-09-17
DE19949801A1 (en) 2001-04-19
EP1092384A3 (en) 2001-10-10
ATE438333T1 (en) 2009-08-15

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