EP2422678B1 - Appareil ménager transportant de l'eau doté d'un dispositif de mesure de la tension de surface lavable - Google Patents

Appareil ménager transportant de l'eau doté d'un dispositif de mesure de la tension de surface lavable Download PDF

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Publication number
EP2422678B1
EP2422678B1 EP11008053.8A EP11008053A EP2422678B1 EP 2422678 B1 EP2422678 B1 EP 2422678B1 EP 11008053 A EP11008053 A EP 11008053A EP 2422678 B1 EP2422678 B1 EP 2422678B1
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EP
European Patent Office
Prior art keywords
household appliance
nozzle
appliance according
arrangement
vat
Prior art date
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Application number
EP11008053.8A
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German (de)
English (en)
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EP2422678A1 (fr
Inventor
Guido Schellenberg
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.)
V-Zug AG
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V-Zug AG
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Classifications

    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/42—Detergent or additive supply

Definitions

  • the invention relates to a water-conducting domestic appliance with a line system for process fluid and with a measuring device for determining the surface tension of the process liquid.
  • the measurement of the surface tension (or a parameter dependent thereon) in a domestic appliance makes it possible to better control or regulate a process.
  • the optimum concentration of surfactant can be determined, which is e.g. an automatic adjustment of the amount of detergent allowed.
  • a household appliance of this type is in EP2319382 disclosed.
  • the measuring device according to this document comprises at least two nozzles through which process water flows at different pressure.
  • Photoelectric sensors are arranged as measuring means on the nozzle in order to determine the drip rates.
  • the difference between the drip rates is a surface tension dependent parameter.
  • DE 196 53 752 describes a measuring cell for measuring the surface tension with a capillary, which can be rinsed with water from an additional nozzle for cleaning.
  • the household appliance is configured to rinse at least the nozzle for cleaning. It turns out that without this measure at least one nozzle tends to fouling, which can affect the measurement.
  • the nozzle is rinsed with a different from the process liquid with respect to degree of contamination cleaning liquid, especially fresh water.
  • degree of contamination cleaning liquid especially fresh water.
  • the household appliance is designed to guide process water through the nozzle in a first direction during the determination of the parameter and to guide cleaning liquid or process water in a second direction through the nozzle for cleaning purposes.
  • the measuring device further comprises a trough assembly, which can be pivoted or rotated by a drive. By pivoting or turning the tray assembly can be cleaned very well become.
  • the nozzle is arranged on the tub arrangement.
  • the measuring device can be designed so that the tub order can be centrifuged with the drive to remove cleaning and / or process fluid.
  • the water-bearing household appliance is in particular a dishwasher or a washing machine.
  • detergents are used which influence the surface tension of the process fluid, so that the surface tension is an important parameter in the control of the device. Further details can be found in EP2319382 ,
  • the invention is described in the context of a washing machine, but it can also be used in other water-conducting domestic appliances, in particular also in dishwashers.
  • the controller 14 is configured to control the metering device 5 as a function of the signal of the measuring arrangement 12, for example in such a way that the surface tension of the wash liquor has a desired value in the process phases provided for this purpose without too much detergent being used for this purpose. Details are in EP2319382 described.
  • Fig. 2-4 show an embodiment of the measuring device.
  • This has a two-part housing 14a, 14b.
  • the two housing parts 14a, 14b are joined together via a sealing ring 15 and enclose an inner space 16 (cf. Fig. 3 ).
  • a trough assembly 17 is arranged, which is rotatable about a rotational axis 19 by a drive 18.
  • the axis of rotation 19 is preferably mounted substantially horizontally in the household appliance.
  • the drive 18 is externally disposed on the housing 14 a, 14 b and connect via a watertight passage 20 with the tub assembly 17.
  • an inlet 22 and an outlet 23 are further provided on the housing 14a, 14b.
  • process fluid is introduced via the inlet 22 into the interior 16 and leaves it via the outlet 23.
  • a Coanda separator 25 is arranged on the tub assembly 17, a Coanda separator 25 is arranged.
  • a Coanda separator is understood to mean a device which is designed such that it has a surface (inclined to the vertical during the measurement) and at least one opening arranged in the surface. These components are dimensioned so that process water falling on the surface runs along it. In the area of the opening, at least part of the process water is deflected into the opening due to the Coanda effect, with the separation of solids.
  • FIGS. 7 and 8 darganni. It has two vertical side walls 26, between which a groove 27 extends whose bottom is formed by the surface 28.
  • Fig. 8 shows the arrangement of the separator 25 during the measurement.
  • the surface 28 is inclined. Water from the inlet 22 hits from above a portion 28a of the surface and then drains over an inclined portion 28b.
  • an opening 29 is arranged, in which a part of the water is deflected due to the Coanda effect.
  • the opening 29 has a cross-section which widens away from the surface 28, thereby reducing the risk that deposits will settle.
  • the Coanda separator serves as far as possible to separate impurities in the process water. Such solids are not normally deflected into the opening 29, but exit via an end portion 28c of the surface 28 so as to be discharged into the bottom portion of the inner space 16 without getting into the tub assembly 17.
  • the process water which passes through the opening 29 is collected by a first trough 31 of the trough assembly (see Fig. 5 ). From there, it runs through a second trough 32 into a third trough 33, from where it drips via two nozzles 34 into the bottom region of the interior 16.
  • the pan assembly 17 is in the in Fig. 3 shown measuring position in which the three trays 31, 32 and 33 are aligned so that they are able to catch the process water.
  • the first tray 31 serves as a catching device for the process water filtered by the Coanda separator 25.
  • the second trough 32 forms a separating basin, which serves to temporarily store process liquid in relative calm, so that sediment can settle.
  • the separating basin ie the second trough 32, has at least one inlet port 38 and at least one outlet port 39 (in the embodiment of Fig. 5 two outlet ports are shown).
  • the second tray 32 forms a recess 41 between the inlet and outlet ports 38 and 39, respectively, in which the suspended matter is deposited.
  • FIG. 6 shows A detail section through a nozzle 33, 34 mounted in its opening 42. It has an inlet region 43, an outlet region 44 and an orifice 45. Fig. 6 shows the nozzle in the measuring position, in which the water along the flow direction from top to bottom through the nozzle 33, 34 flows.
  • the diameter of the inlet region 43 is greater than that of the outlet region 44.
  • the diameter of the inlet region 43 is chosen so large that it can not be blocked by solids that pass through the opening 29 of the Coanda separator.
  • the transition from the inlet region 43 to the outlet region 44 is over a relatively short (i.e., compared to the total nozzle length) stage so that solids can not become wedged there.
  • the outlet area 44 has a relatively small diameter to allow good droplet formation.
  • the diameter of the outlet area is not more than 1.5mm. This diameter of the outlet area slightly decreases from the mouth 45 into the nozzle, thereby preventing solids from becoming wedged in the outlet area during a measurement.
  • the diameter decreases from the mouth 45 over a length of at least 3 mm.
  • the nozzles 33, 34 are dimensioned such that the process liquid emerges dropwise from the orifices 45.
  • the drops are preferably detected by means of two light barriers, which are formed by light sources 47 and light sensors 48.
  • the light sources 47 are infrared light sources.
  • the light sources are arranged outside the housing 14a, 14b and the housing is permeable to the measuring light.
  • the light source 47 of one light barrier and the light sensor 48 of the other light barrier are arranged on one side of the housing 14a, 14b so that the directions of the measuring light of the two barriers are antiparallel.
  • the well assembly 17 is located in the in Fig. 3 shown measuring position.
  • the measuring device has at least one magnet with which the tub arrangement can be brought into the measuring position.
  • the magnet is a movable permanent magnet 50 which can be reciprocated by an actuator (servomotor, bimetal, wax motor, or the like) between a first and a second position, and cooperates in the first position with a metal plate 51 disposed on the measuring assembly but not in the second position. If the magnet is brought into the first position, the tray assembly 17 is pulled into the measuring position.
  • an electromagnet can be used.
  • the measuring device 12 If the measuring device 12 is to be cleaned, water that is as clean as possible can be introduced into the interior 16 via the inlet 22. At the same time, the Tub assembly 17 are rotated by the drive 18, so that deposits from the tubs 31 - 33 flow. After this cleaning, the measuring device 12 is preferably rotated so fast, so that the liquid is removed as completely as possible by centrifugation. For a good centrifugal effect is centrifuged at typical device sizes preferably at a speed of at least 150 revolutions per minute.
  • a rotation of the tub arrangement 17 can also be useful between two measurements in order to replace the process water in the measuring apparatus 12 as completely as possible.
  • the pan assembly 17 is rotatably disposed in the measuring device.
  • a pivotable arrangement is also conceivable, so that e.g. the tray assembly is at least as far pivotable that water and dirt can flow out of the trough-shaped interior.
  • the household appliance is designed for a specific purpose
  • the mechanical and electrical components are suitable for this purpose and the controller is designed to control the mechanical and electrical components in such a way that that this purpose is achieved.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)

Claims (15)

  1. Appareil ménager conduisant de l'eau avec un système de tuyaux (6, 7, 10) pour un liquide de processus et avec un dispositif de mesure (12) pour déterminer la tension de surface du liquide de processus, le dispositif de mesure (12) ayant au moins une buse (34) et des moyens de mesure (47, 48) arrangés à la buse (34), pour déterminer au moins un paramètre du liquide de processus, qui dépend de la tension de surface, l'appareil ménager étant adapté à rincer au moins la buse (34) pour la nettoyer, et le dispositif de mesure (12) ayant un agencement de cuve (17) pour capturer le liquide de processus, caractérisé en ce que l'agencement de cuve (17) est pivotable ou rotatif avec un entrainement (18), et la buse (34) est arrangée à l'agencement de cuve (17) et étant pivotable ou rotative avec l'agencement de cuve (17) .
  2. Appareil ménager selon la revendication 1, adapté à rincer au moins la buse (34) pour nettoyage avec du liquide de nettoyage, particulièrement avec de l'eau fraîche.
  3. Appareil ménager selon l'une des revendications précédentes, adapté à guider de l'eau de processus dans une première direction à travers la buse (34) pendant une mesure du paramètre et à guider du liquide de nettoyage ou de l'eau de processus dans une deuxième direction à travers la buse (34) pour le nettoyage.
  4. Appareil ménager selon l'une des revendications précédentes, l'appareil ménager étant adapté à rincer l'agencement de cuve (17) avec le liquide de nettoyage.
  5. Appareil ménager selon l'une des revendications précédentes, l'agencement de cuve (17) étant centrifugé avec l'entrainement (18) afin d'enlever du liquide de nettoyage et/ou du liquide de processus, particulièrement avec un taux de rotation d'au moins 150 rotations par minute.
  6. Appareil ménager selon l'une des revendications précédentes, le dispositif de mesure (12) ayant au moins un aimant, particulièrement au moins un électroaimant, à l'aide duquel l'agencement de cuve (17) est apporté dans une position de mesure où la tension de surface est mesurable.
  7. Appareil ménager selon l'une des revendications précédentes, le dispositif de mesure (12) ayant une carcasse (14a, 14b), à l'intérieur de laquelle l'agencement de cuve (17) est supporté de manière pivotable ou rotative, une entrée (22) étant prévue à la carcasse (14a, 14b) au-dessus de l'agencement de cuve (17) et une sortie (23) pour l'eau de processus étant prévue au-dessous de l'agencement de cuve (17).
  8. Appareil ménager selon l'une des revendications précédentes, l'agencement de cuve (17) étant pivotable ou rotatif autour d'un axe de rotation (19) avec l'entrainement (18).
  9. Appareil ménager selon l'une des revendications précédentes, le dispositif de mesure (12) ayant un Coanda-séparateur (25) ayant une surface inclinée (28) et au moins une ouverture (29) arrangée dans la surface (28), le Coanda-séparateur (25) étant adapté de sorte que de l'eau de processus s'écoule le long de la surface (28) et au moins une partie de l'eau de processus est déviée dans l'ouverture (29) en précipitant de particules solides, et l'eau de processus
    étant guidée à partir de l'ouverture (29) jusqu'à la buse (34).
  10. Appareil ménager selon la revendication 9, le Coanda-séparateur (25) étant arrangé à l'agencement de cuve (17) et étant pivotable ou rotatif avec l'agencement de cuve (17).
  11. Appareil ménager selon l'une des revendications précédentes, le dispositif de mesure (12) ayant un bassin de séparation (32) ayant une porte d'entrée (38), une porte de sortie (39) et une cavité (41) arrangée entre la porte d'entrée et la porte de sortie (38, 39), l'appareil ménager étant adapté à guider l'eau de processus à partir de la porte d'entrée (38) par l'intermédiaire de la cavité (41) jusqu'à la porte de sortie (39), de sorte que des matériaux qui s'enfoncent sont accumulés dans la cavité (41).
  12. Appareil ménager selon la revendication 11, le bassin de séparation (32) étant arrangé à l'agencement de cuve (17) et étant pivotable ou rotatif avec l'agencement de cuve (17).
  13. Appareil ménager selon l'une des revendications précédentes, l'appareil ménager étant adapté à guider l'eau de processus pendant la mesure de la tension de surface à travers une section d'entrée (43) et ensuite une section de sortie (44) de la buse (24) jusqu'à une ouverture (45) de la buse (34), un diamètre de la section de sortie (44) décroisant à partir de l'ouverture (45) vers l'intérieur de la buse (34), particulièrement le long d'une longueur d'au moins 3 mm.
  14. Appareil ménager selon l'une des revendications précédentes, le dispositif de mesure (12) ayant au moins une source de lumière (47) et un capteur de lumière (48), qui forment une barrière de lumière pour détecter des gouttes qui passent à travers la buse (34), la barrière de lumière (47) et le capteur de lumière (48) étant arrangés à l'extérieur d'une carcasse (14a, 14b) du dispositif de mesure (12).
  15. Appareil ménager selon l'une des revendications précédentes, étant formé comme lave-vaisselle ou machine à laver.
EP11008053.8A 2011-10-05 2011-10-05 Appareil ménager transportant de l'eau doté d'un dispositif de mesure de la tension de surface lavable Active EP2422678B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11008053.8A EP2422678B1 (fr) 2011-10-05 2011-10-05 Appareil ménager transportant de l'eau doté d'un dispositif de mesure de la tension de surface lavable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11008053.8A EP2422678B1 (fr) 2011-10-05 2011-10-05 Appareil ménager transportant de l'eau doté d'un dispositif de mesure de la tension de surface lavable

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EP2422678A1 EP2422678A1 (fr) 2012-02-29
EP2422678B1 true EP2422678B1 (fr) 2018-11-28

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2816150B1 (fr) 2014-09-24 2018-03-14 V-Zug AG Appareil ménager à conduite d'eau ayant un filtre à lessive
DE102019216599A1 (de) * 2019-10-29 2021-04-29 E.G.O. Elektro-Gerätebau GmbH Sensorvorrichtung, Verfahren zum Betrieb einer solchen Sensorvorrichtung und wasserführendes Haushaltsgerät

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3303939A1 (de) 1983-02-05 1984-08-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur messung mechanischer eigenschaften einer fluessigkeit
DE4112417A1 (de) 1991-04-16 1992-10-22 Henkel Kgaa Verfahren zum waschen und vorrichtung zum durchfuehren des verfahrens
DE19653752C2 (de) * 1996-12-20 2003-08-07 Sita Messtechnik Gmbh Verfahren und Einrichtung zur Reinigung von Prozess-Meßzellen mit Kapillaren
DE10022863B4 (de) * 2000-05-10 2006-08-24 Miele & Cie. Kg System zur Bestimmung der Oberflächenspannung einer Lösung, insbesondere einer Tensidlösung
DE10042713C2 (de) * 2000-08-31 2003-08-21 Miele & Cie Verfahren zur Steuerung eines Waschprogramms
US20030213069A1 (en) * 2002-05-20 2003-11-20 Tortorici Paul Lee System and method of surfactant dosing
PL2319382T3 (pl) 2010-10-14 2014-11-28 V Zug Ag Zmywarka do naczyń albo pralka z urządzeniem pomiarowym do mierzenia napięcia powierzchniowego ługu piorącego

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Title
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