EP2146614B1 - Procédé de reconnaissance de la position d'un élément de fermeture dans un mécanisme répartiteur d'eau - Google Patents

Procédé de reconnaissance de la position d'un élément de fermeture dans un mécanisme répartiteur d'eau Download PDF

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Publication number
EP2146614B1
EP2146614B1 EP08735643A EP08735643A EP2146614B1 EP 2146614 B1 EP2146614 B1 EP 2146614B1 EP 08735643 A EP08735643 A EP 08735643A EP 08735643 A EP08735643 A EP 08735643A EP 2146614 B1 EP2146614 B1 EP 2146614B1
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EP
European Patent Office
Prior art keywords
closure element
circulating pump
control device
detecting
reference position
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.)
Active
Application number
EP08735643A
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German (de)
English (en)
Other versions
EP2146614A2 (fr
Inventor
Michael Rosenbauer
David Semerad
Christian Wolf
Bernd Heisele
Anton Oblinger
Andreas Reiter
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL08735643T priority Critical patent/PL2146614T3/pl
Publication of EP2146614A2 publication Critical patent/EP2146614A2/fr
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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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention
    • 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
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms
    • 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
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/08—Drain or recirculation pump parameters, e.g. pump rotational speed or current absorbed by the motor

Definitions

  • the present invention relates to a method for detecting the position of a closure element in a reversing device of a dishwasher.
  • reversing device the term “water switch” can be used synonymously.
  • the reversing device has the function of distributing a rinsing liquid to different spraying systems or spraying levels within a washing container of the dishwasher.
  • a circulating pump ensures the transport of the rinsing liquid.
  • a drive device which is controlled by a control device, changes the position of the closure element.
  • the invention further relates to a device for detecting the position of the closure element.
  • the electronic control device can determine the position of the valve body in one of two closed positions accurately and safely.
  • the very complex structure of the reversing device since both the outer walls and additional elements inside the reversing device must ensure the leadership of the valve body.
  • at least one sensor must be arranged in the region of the circulating pump. Overall, this leads to higher costs in the production of the dishwasher.
  • Object of the present invention is to provide a more cost-effective method and apparatus for detecting the position of a closure element in a reversing device of a dishwasher, so that the position of the closure element is detected quickly and safely after an error.
  • the closure element is adjusted by the drive means, e.g. go berserk.
  • the control device determines at least one signal value of the circulating pump.
  • the signal value may be a power value of the circulation pump, for example pressure, load angle or vibration.
  • the control device monitors its power values in any case in order to control the rotational speed of the circulating pump.
  • it compares the determined signal values with a value which is stored in the control device for a reference position of the closure element.
  • the third step can likewise be carried out during or after the second step.
  • the first, second and third steps can be carried out continuously or batchwise, with any combination being possible between continuous and discontinuous steps.
  • the reference position defines a specific position of the closure element with respect to the water switch. It is stored in the control device power fail-safe and out of her programs can be started or continued after an error.
  • the closure element in the reversing device is actively activated.
  • This has the advantage that the position of the closure element can be determined quickly and reliably after a fault by a defined sequence of movements. For this purpose, only the position of the closure element within a defined sequence of movements is changed until the reference position is reached. From the reference position, the closure element can be selectively controlled again.
  • Another advantage lies in the simple structure of the reversing device. It only needs a housing with an inlet and various processes and a closure element whose movement is effected by a drive device. On sensor systems for detecting the position of the closure element, they are located directly in the water gate or for indirect detection in the circulation pump can be omitted.
  • the housing may, for. Example, have a hollow cylindrical shape in which a disk-shaped closure element is rotated for example by an electric motor. Simple geometric shapes or standard parts are inexpensive. In addition, fewer items are needed in total, thereby reducing the assembly cost. In addition, the reduction of the parts, in particular the moving parts, leads to fewer sources of interference and less friction losses in the reversing device.
  • the closure element is stopped in the reference position to synchronize its position with the reversing device.
  • the position of the closure element with reference elements such as the operations on the housing of the reversing device is brought into agreement.
  • the closure element can then be controlled in a defined manner depending on a program sequence.
  • the reference position corresponds to a position of the closure element, which is also occupied during a program sequence relative to the housing of the reversing device. This ensures that the program sequence can be resumed as quickly as possible after an accident, since an additional process step for aligning the closure element from the reference position deleted.
  • the synchronization of the closure element takes place on the basis of openings as reference elements in the reversing device.
  • the openings are the outlets or outlets of the reversing device, by means of which the rinsing liquid is pumped to the spraying systems in the washing compartment of the dishwasher.
  • the closure element also has openings which, depending on its position, are aligned with the openings of the reversing device and thus release one or more outputs of the reversing device. This also changes the amount of rinsing liquid that can pump the circulating pump per unit time by the reversing device.
  • a maximum volume flow is set. This is done by bringing the closure element into its reference position, wherein the maximum volume flow is established in this reference position by a corresponding design of the closure element. In this position, the current consumption value of the circulation pump is highest. This is e.g. when using a centrifugal pump the case. Since the power consumption of the pump is limited, the current consumption value only increases up to a maximum value. It can therefore advantageously represent the signal value stored in the control device for the reference position which it continuously compares with the measured signal values during position detection. Since the maximum current consumption value is only reached in the reference position, their unambiguous determination is always guaranteed. However, depending on the pump type and type, the maximum current consumption can also be at a volumetric flow which is below the maximum volumetric flow. In this case, the reference position and / or the closure element is designed accordingly.
  • other signal values such as, for example, rotational speed, pressure, load angle or vibration at the circulating pump
  • the power consumption of the circulation pump is determined by the control device during the position detection as the signal value.
  • additional sensors in or on the circulating pump can be dispensed with. The current consumption is detected anyway in the control of the circulation pump of the control device, since it is used for power control or speed control. Additional parts on the circulation pump can be saved and thus costs and additional sources of error can be reduced.
  • the object of the invention is also achieved by a device for detecting the position of a closure element in a dishwasher comprising a reversing device with a closure element arranged therein, a circulation pump and a control device which is connected to the circulation pump and a drive device for the closure element.
  • the device also has means for detecting and evaluating signal values of the circulating pump as a function of the position of the closure element and is furthermore sensor-free.
  • the invention thus turns away from detecting the position of the closure element directly by the sensor. Rather, it pursues the principle of detecting a characteristic signal value or power value of the circulating pump and deducing therefrom the position of the closure element in the water switch. Since a data acquisition of characteristics of the circulation pump for their control is necessary anyway, the proposed device causes no increased design effort. Rather, it relies on largely existing devices, so that it is less expensive compared to an additional sensor.
  • FIG. 1 schematically shows a dishwasher 10 with a washing container 12, in which an upper basket 14 and a lower basket 16 are arranged.
  • an upper spray system 18 and below the lower basket 16 a lower spray system 20 each rotatably mounted in the form of a Sprüharmes.
  • the upper spray system 18 is supplied via a supply line 22 and the lower spray system via a supply line 24 with rinsing liquid.
  • a sump 26 is arranged with a strainer insert 28, which is connected via a fluid line 29 to a circulation pump 30. Via a liquid line 31, the circulation pump 30 is connected to a water switch 32. It has a top surface 39 with two Openings 34, 36, wherein the opening 34 with the supply line 22 and the opening 36 is in communication with the supply line 24.
  • a disk-shaped closure element 38 is mounted rotatably parallel to the cover surface 39. It is rotatably mounted on a motor shaft 41 of an electric motor 40.
  • the electric motor 40 and the circulation pump 30 are connected via an electrical line 42, 44 with a control device 46.
  • FIG. 2 shows an embodiment of the water switch 32 in a partially sectioned view. It has an inlet port 48 and two outlet ports 50, 52.
  • a disc-shaped closure element 38 is arranged, which is connected via a flange 54 with the shaft 41.
  • FIG. 3 shows the closure element 38 in a single representation. It comprises the central flange 54 and eccentrically an opening 60 with a large and an opening 62 with a small cross-section.
  • the closure element 38 is rotatably mounted in front of the outlet nozzle 50, 52 in the water switch 32, so that the openings 60, 62 either or together with the nozzle 50, 52 are aligned or close.
  • the shaft 41 ( FIG. 2 ) is liquid-tight by a housing 56 of the water switch 32 out. Outside the housing 56, a gear 58 is mounted on the shaft 41, which serves as a connecting member to the electric motor 40 (FIG. FIG. 1 ) serves as a drive of the closure element 38.
  • the circulation pump 30 supplies the water distributor 32 with rinsing liquid via the inlet connection 48, which leaves the water distributor 32 again via the outlet connection pieces 50, 52 and the corresponding supply lines 22, 24.
  • the delivery quantity of the rinsing liquid can be controlled by one or both outlet ports 50, 52.
  • the outlet ports 50, 52 can thus be alternately or jointly released or closed during operation of the dishwasher 10.
  • the rinsing liquid is in the dishwasher 10 (FIG. FIG. 1 ) in a cycle.
  • the circulation pump 30 sucks the Rinse liquid through the sump 26 through the line 29 and pumps it through the line 31 further into the water switch 32.
  • the controller 46 controls the electric motor 40 depending on the program so that the closure element 38, the openings 34 and 36 opens or closes.
  • supply line 22 or 24 or both are supplied with rinsing fluid.
  • the electric motor 40 can no longer be supplied with power.
  • the closure element 38 then remains in any position.
  • the assignment of the position of the closure element 38 with respect to the water diverter 32, which requires the control device 46 to control the closure element 38, is lost.
  • rinsing liquid which flows back into the reversing device as a result of gravity from the lines 22, 24, additionally change the position of the closure element.
  • a precise position detection of the closure element 38 by the control device 46 is necessary.
  • the closure element 38 is moved into a reference position. It defines a specific position of the closure element 38 within the water switch 32, from which a program sequence of the dishwasher can be restarted. In this position, the power consumption of the circulation pump 32 is highest because it pumps the liquid unsuccessfully against the closed openings 34, 36 and thus against a maximum resistance. Since the maximum current consumption value is only reached in the reference position, its unambiguous determination is guaranteed at all times.
  • the control device 46 detects the current consumption in the control of the circulation pump 30 anyway to use them for power influencing or speed control of the circulation pump 30.
  • the power consumption value of the circulation pump 30 which is characteristic for the reference position is preset and stored in the control device 46 so that it is protected against power failure.
  • the control device 46 For detecting the position of the closure element 38 in the water switch 32 after a fault, the control device 46 first starts the circulation pump 30 and then controls the electric motor 40 so that it completes a full rotation of the shaft 41 together with closure element 38. Meanwhile, the controller 46 detects continuously the current consumption value of the circulation pump 30 and compares it with the value stored in the control device 46 for the reference position of the closure element 38. During the 360 degree rotation, the openings 34, 36 are released from the closure member 38. In this case, the value of the power consumption of the circulation pump 30 changes. Once the stored for the reference position power consumption value of the circulation pump 30 is reached, the program sequence of the dishwasher can be continued. A sensor for detecting the exact position or position of the closure element 38 in the water switch 32 or in the circulation pump 30 is therefore unnecessary.
  • the reference position corresponds to a position of the closure element 38, which is also occupied during a program sequence with respect to the openings 34, 36. This ensures that the program sequence can be resumed as quickly as possible after a fault, since an additional alignment of the closure element 38 from the reference position is omitted in a start position for the program flow.
  • the foregoing device 32 described in detail is an embodiment, it may be modified in a conventional manner by one skilled in the art to a large extent without departing from the scope of the invention.
  • the specific configuration of the closure element 38 can also take place in a different form from that described here.
  • the number and size and shape of the openings 60, 62 may vary in various embodiments.
  • the use of the indefinite article "on” or “one” does not exclude that the characteristics in question may also be present multiple times.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)

Claims (7)

  1. Procédé de reconnaissance de la position d'un élément de fermeture (38) d'un mécanisme d'inversion (32) dans un lave-vaisselle (10), lequel mécanisme opère la répartition d'un liquide transporté par une pompe de circulation (30), et la position de l'élément de fermeture (38) est modifiable par un dispositif d'entraînement (40) piloté par un dispositif de commande (46), le procédé comprenant les étapes suivantes :
    a) déplacer l'élément de fermeture (38) au moyen du dispositif d'entraînement (40),
    b) déterminer au moins une valeur de signal de la pompe de circulation (30) pendant l'étape a) au moyen du dispositif de commande (46),
    c) comparer les valeurs de signaux déterminées à au moins une valeur déposée dans le dispositif de commande (46) pour au moins une position de référence de l'élément de fermeture (38).
  2. Procédé selon la revendication 1, dans lequel l'étape suivante est effectuée après l'étape c) :
    d) arrêter l'élément de fermeture (38) dans la position de référence.
  3. Procédé selon la revendication 2, dans lequel la synchronisation de l'élément de fermeture (38) s'effectue par rapport à des orifices (34, 36) dans le mécanisme d'inversion (32).
  4. Procédé selon l'une des revendications précédentes, dans lequel un débit volumétrique maximal est réglé à l'étape d).
  5. Procédé selon l'une des revendications précédentes, dans lequel le courant absorbé par la pompe de circulation (30) est mesuré comme valeur de signal.
  6. Dispositif de reconnaissance de la position d'un élément de fermeture (38) dans un lave-vaisselle (10), comprenant un mécanisme d'inversion (32), un élément de fermeture (38) placé dans celui-ci, une pompe de circulation (30) et un dispositif de commande (46) relié à la pompe de circulation (30) et à un dispositif d'entraînement (40) de l'élément de fermeture (38), caractérisé en ce que le dispositif comprend des moyens de détermination et d'exploitation de valeurs de signaux de la pompe de circulation (30) en fonction de la position de l'élément de fermeture (38).
  7. Dispositif selon la revendication 6, caractérisé par un appareil de mesure pour déterminer le courant absorbé par la pompe de circulation (30).
EP08735643A 2007-04-12 2008-04-01 Procédé de reconnaissance de la position d'un élément de fermeture dans un mécanisme répartiteur d'eau Active EP2146614B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08735643T PL2146614T3 (pl) 2007-04-12 2008-04-01 Sposób rozpoznawania położenia elementu zamykającego w rozdzielaczu wody

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007017274A DE102007017274A1 (de) 2007-04-12 2007-04-12 Verfahren zur Lageerkennung eines Verschlusselements in einer Wasserweiche
PCT/EP2008/053869 WO2008125482A2 (fr) 2007-04-12 2008-04-01 Procédé de reconnaissance de la position d'un élément de fermeture dans un mécanisme répartiteur d'eau

Publications (2)

Publication Number Publication Date
EP2146614A2 EP2146614A2 (fr) 2010-01-27
EP2146614B1 true EP2146614B1 (fr) 2012-11-14

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Country Status (7)

Country Link
US (1) US8295984B2 (fr)
EP (1) EP2146614B1 (fr)
CN (1) CN101657138B (fr)
DE (1) DE102007017274A1 (fr)
ES (1) ES2395777T3 (fr)
PL (1) PL2146614T3 (fr)
WO (1) WO2008125482A2 (fr)

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KR100457589B1 (ko) * 2002-11-28 2004-11-17 엘지전자 주식회사 식기세척기의 유로개폐장치
ATE350649T1 (de) * 2003-09-04 2007-01-15 Askoll Holding Srl Verfahren und vorrichtung zur bestimmung des hydraulischen durchflusses in einer pumpe
KR20060034108A (ko) * 2004-10-18 2006-04-21 삼성전자주식회사 식기세척기 및 식기세척기의 펌프고장 감지방법
US7992384B2 (en) * 2005-05-18 2011-08-09 Komatsu Ltd. Hydraulic control device of construction machinery
CN1887212A (zh) * 2005-06-29 2007-01-03 乐金电子(天津)电器有限公司 洗碗机的漏水检测装置及其方法
DE502006008496D1 (de) * 2006-01-12 2011-01-27 V Zug Ag Haushaltegerät mit Wasser führender Umschaltvorrichtung

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Publication number Publication date
ES2395777T3 (es) 2013-02-15
CN101657138B (zh) 2011-10-12
US20100121497A1 (en) 2010-05-13
DE102007017274A1 (de) 2008-10-30
WO2008125482A2 (fr) 2008-10-23
WO2008125482A3 (fr) 2009-02-26
EP2146614A2 (fr) 2010-01-27
US8295984B2 (en) 2012-10-23
CN101657138A (zh) 2010-02-24
PL2146614T3 (pl) 2013-04-30

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