EP2052665A1 - Appareil ménager doté d'un dispositif de distribution de liquide réglable et son procédé de contrôle - Google Patents

Appareil ménager doté d'un dispositif de distribution de liquide réglable et son procédé de contrôle Download PDF

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Publication number
EP2052665A1
EP2052665A1 EP08020671A EP08020671A EP2052665A1 EP 2052665 A1 EP2052665 A1 EP 2052665A1 EP 08020671 A EP08020671 A EP 08020671A EP 08020671 A EP08020671 A EP 08020671A EP 2052665 A1 EP2052665 A1 EP 2052665A1
Authority
EP
European Patent Office
Prior art keywords
liquid
distribution device
domestic appliance
liquid distribution
state
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.)
Withdrawn
Application number
EP08020671A
Other languages
German (de)
English (en)
Inventor
Winfried Steiner
Karlheinz Kohles
Stefan Füglein
Klaus Martin Forst
Jürgen Vogel
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Publication of EP2052665A1 publication Critical patent/EP2052665A1/fr
Withdrawn legal-status Critical Current

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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
    • A47L15/4214—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
    • A47L15/0018—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
    • 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
    • A47L2401/09—Water level
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/03—Water recirculation, e.g. control of distributing valves for redirection of water flow
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Definitions

  • the invention relates to a domestic appliance, in particular a dishwasher, with an adjustable liquid distribution device for adjusting the liquid distribution within the domestic appliance, and a method for controlling the liquid distribution device.
  • a dishwasher with a switchable distributor valve is known. From the dishwasher sump of the dishwasher is sucked through a circulation pump rinsing liquid and fed through the distribution valve an upper and lower spray arm.
  • a movable ball is arranged, which releases by temporal variation of the operation of the circulation pump, a first line to the upper spray arm, a second line to the lower spray arm or in an intermediate position both lines to two spray arms. If the circulation pump is out of operation, the switching element falls into a defined basic state within the distribution valve.
  • the switching of the distribution valve allows the selection of the spray arm to be operated, so that, for example, with little items only one spray arm is operated to save water or the items to be washed is applied from only one spray with high Spülillonkeitsmenge.
  • the object of the invention is to provide a household appliance and to provide for this a method in which the secure reaching a switching position of a liquid distribution device is verifiable.
  • the liquid is distributed within the household appliance in a household appliance during operation by an adjustable liquid distribution device.
  • the rinsing liquid circulated by a circulating pump is distributed by the liquid distribution device to different spray arms.
  • the liquid distribution device can operate linearly, i. vary the liquid distribution continuously or switch the liquid distribution in stages.
  • the liquid distribution device preferably has at least one adjusting element with which the distribution of the liquid within the device is set. It may happen that the actuator was not properly controlled or the desired position was not reached. As a result, after a switching process in the liquid distribution device, the actual distribution of the liquid may deviate from the desired liquid distribution.
  • a detection device is provided, with which the actual state of the liquid is detected within the household appliance. By detecting the actual state as a measure of the liquid distribution, a comparison with the desired state of the liquid distribution device is made possible. Regardless of the possible cause of the malfunction of the liquid distribution device thus the effect of the malfunction is detected.
  • the liquid distribution or a change of the liquid distribution affects the liquid flow, the liquid level, the pressure of the liquid in different areas or the like.
  • the liquid distribution device can for example be hydraulically switched by the liquid flow, such as by means of the EP 0 237 994 B1 known ball valve. Or the liquid distribution device is adjusted by a coupled to a motor drive adjustment, such as a rotary valve, a valve disc or similar.
  • the motor drive is, for example, a magnetic switch, an electric motor, a pneumatic or hydraulic device.
  • the individual switching states of the liquid distribution device can be detected on the basis of the differences in the liquid level. In doing so, e.g. depending on the switching position different amount of liquid circulated in liquid lines, distributed within the household appliance or the like, so that each sets a different liquid level for each switching position.
  • the liquid level can be advantageously measured with an analog pressure sensor, with a float switch, a pressure switch, an ultrasonic level gauge or the like.
  • the measurement can be done discretely by detecting different level positions, or continuously, so that the most accurate level determination can be done.
  • the liquid column above the pressure sensor can be detected with a pressure sensor.
  • the liquid level sensor is arranged on the suction side of a circulating pump. Since liquid is constantly present at this point, a liquid level measurement can be carried out independently of the distribution selected. In addition, at the beginning of a rinsing cycle, a washing cycle or the like, a measurement of the amount of liquid filled in the household appliance can be performed. Thus, only one component is required to detect the liquid filling amount of the household appliance and the actual position of the liquid distribution device. This is advantageously carried out in the bottom region of a container of the household appliance. For example, in the dishwasher sump in the washing of a dishwasher, since here the rinsing liquid moves comparatively slowly and an average of the liquid level is particularly easy to measure.
  • the condition of the liquid is detected with a liquid flow meter.
  • the liquid measurement can be measured directly by a lever, which is deflected by the fluid pressure, by a measuring wheel or indirectly by a pressure sensor, which responds to the liquid accumulation pressure.
  • one or more flow meters are provided in the line system of the household appliance, wherein at a known flow rate of a circulating pump of the household appliance, the flow rate of the liquid in the individual line sections depends on which switching state the liquid distribution device occupies.
  • at least one flow sensor is arranged in the inlet and / or at least one outlet of the liquid distribution device.
  • the signal detected by the detection device about the state of the liquid is advantageously sent via a signal line to a control device.
  • the further evaluation of the detection signal then takes place in the control device.
  • the controller is the programmer control of the home appliance. For example, the washing program control of a dishwasher.
  • the control device is in turn connected via a control line to the liquid distribution device and / or a circulating pump. Depending on whether the liquid distribution device is switched by a motor drive or e.g. by the timing of the circulation pump, corresponding control signals are provided by the control device.
  • the function of an adjustable liquid distribution device of a domestic appliance is detected based on the state of the liquid actually taken after the liquid distribution device has been set.
  • the instantaneous state of the liquid is compared with a predetermined desired value.
  • a plurality of different, predetermined setpoints are advantageously provided, which should each be achieved from the instantaneous state of the liquid when the liquid distribution device is operating correctly.
  • each switching state is compared by means of a separate setpoint, so that an unambiguous assignment can take place.
  • the liquid distribution device is switched over an intermediate position again in the selected position when it was detected by a deviation of the current state of the liquid from the target value that the desired position has not been reached. Is e.g. an adjustment of the liquid distribution device jammed for a short time or not close tightly by an impurity in the liquid at an outlet opening, this state is brought about by an intermediate switching, preferably the idle state, and re-driving the desired position.
  • the number of repetitions is limited, wherein when the number is exceeded and further malfunction of the liquid distribution device an error message is issued.
  • the user of the household appliance is informed that maintenance must be performed. It can be provided that the household appliance continues to operate despite the malfunction.
  • the desired value for a predetermined position of the liquid distribution device is not fixed unchangeable, but is adapted based on other operating parameters of the household appliance. If, for example, more dishwashing liquid is needed in a dishwasher for a wash program than for another wash program, then the predetermined desired value is adapted in accordance with the amount of wash liquid. For example, it changes the liquid level in the bottom area of a container of the household appliance, depending on whether more or less total amount of liquid is used. Therefore, even during operation of the liquid distribution device in different positions, the absolute value of the predetermined setpoint (s) changes.
  • a normalization of the setpoint or values is advantageously carried out in a defined operating state of the dishwasher.
  • a deviation in the filled-in total liquid quantity can be compensated. This is done e.g. in a dishwasher, a correction if more rinse liquid adheres to the items to be washed.
  • operational wear phenomena e.g. the circulation pump can be considered without much effort.
  • Fig. 1 shows a schematic representation of the Spülillonkeitsniklaufs in a dishwasher.
  • an upper spray arm 2 In a washing compartment 1 of the dishwasher, an upper spray arm 2, a lower spray arm 3 and an upper and lower dish rack 4 are arranged.
  • the spray arms 2, 3 By means of the spray arms 2, 3, the items to be washed stored in the dish racks 4 are treated with rinsing liquid, which then collects in the rinsing space 1 or rinsing container in the rinsing machine sump 5.
  • a circulation pump 6 the rinsing liquid is sucked from the dishwasher sump 5 and conveyed through a connecting line 7 to a switching valve 8 and ball switch.
  • the rinsing liquid from the circulating pump 6 is selectively passed through a first line 9 to the upper spray arm 2, through a second line 10 to the lower spray arm 3, 'or both the lower and upper spray arm 2, 3.
  • a bypass line 11 leads from the valve body to the suction side of the circulation pump. 6
  • a flow guide 18 is arranged, which deflects the liquid flow coming from the circulating pump 6 in a streamlined manner to the first and / or second line 9, 10. Furthermore, a ball 14 is movably mounted within the valve body, which in Fig. 1 can assume switching positions marked I, II and III. In the switching position I, the bypass line 11, in the switching position II, the first line 9 and in position III, the second line 10 is closed. In the position I, the ball 14 is held by the pressure difference between the inflowing into the switching valve 8 rinsing liquid and the inlet-side suction before the circulation pump 6. In addition, a flow around the ball 14 in the position I is prevented by the flow guide 18.
  • both spray arms 2, 3 are supplied with rinsing liquid.
  • the liquid level of the rinsing liquid in the dishwasher sump 5 depends on whether the circulating pump 6 is in operation and which position the ball 14 occupies. Once the fresh water supply has been turned off and the circulation pump 6 is out of operation, the rinsing liquid from the lines 9 and 10 and the spray arms 2, 3 back or out and collects in the dishwasher sump 5. At this time, a maximum Spülillonkeitsmen in the dishwasher sump 5 a as it is in Fig. 2 is marked with the level A.
  • the lower spray arm 3 is supplied with rinsing liquid.
  • the second line 10 and the lower spray arm 3 are filled with rinsing liquid and a certain amount of rinsing liquid, which has been sprayed from the spray arm 3, has not yet run back into the dishwasher sump.
  • this additionally required amount of liquid causes a lowering of the liquid level A to level B.
  • the upper spray arm 2 is acted upon with rinsing liquid, wherein the first line and the spray arm 2 are filled with liquid.
  • both the upper and the lower spray arms 2, 3 are supplied with rinsing liquid.
  • Both spray arms 2, 3 and the lines 9 and 10 are filled with rinsing liquid, and the rinsing liquid quantity distributed in the rinsing chamber 1 is the largest here. Therefore, in this switching position, the liquid level D is even lower.
  • a fluid level can be assigned, wherein in summary in the basic position of the ball 14, the level A is reached, in the position II, the level B, in the position III, the level C and in the position I, the level D.
  • a pressure sensor 21 or ultrasonic level meter is arranged at the bottom of the dishwasher sump 5, which detects the average level of the rinsing liquid in the dishwasher sump 5.
  • the corresponding signal is transmitted from the pressure sensor 21 via a signal line 22 to a control unit 20 of the dishwasher.
  • the control unit 20 compares the signal from the pressure sensor 21 with a desired value and causes the circulating pump 6 in a deviation of the actual value of the setpoint to a renewed activation of the desired position of the ball 14 in the changeover valve 8.
  • a control signal via the control line 25th sent to the drive unit 24 of the circulation pump 6.
  • the setpoints which are compared with the actual values in the various positions, also depend on the selected speed of the circulating pump 6, since the amount of liquid in the lines 9, 10 and the spray arms 2, 3 and the momentarily in the washing compartment 1 distributed rinsing liquid depend on the liquid pressure and the pump speed.
  • the position of the ball 14 is attempted to be reached again by triggering the circulation pump 6. If e.g. after five times repeating this switching attempt, the desired position has not yet been reached or the corresponding liquid level is not detected, then an error message is displayed for the operator on the control panel and stopped the rinsing or continued with the malposition.
  • the desired switching position is attempted three times by means of activation of the circulating pump 6. If this was not achieved after the third shift attempt, a new normalization of the fluid levels is carried out, for example, by switching off the circulation pump 6 and carrying out a normalization of the fluid level A when the circulation pump 6 is turned off. With the new standardized setpoint values, the desired switching position is then activated again and the setpoint value and the actual value are compared again. If, for example, the position is not reached again after three switching attempts, so also an error message is issued as above.
  • flow sensors 30, 32 or pressure sensors are provided.
  • the first flow sensor 30 is arranged on the first line 9 and the second flow sensor 32 on the second line 10.
  • the flow meter 30, 32 have a driver 31 which projects into the line 9 and 10 and is actuated by the liquid flow.
  • the flow of the liquid is detected by means of the driver 31 and it can be determined whether and through which of the lines 9, 10 rinsing liquid flows.
  • the basic position i. when the circulating pump 6 is switched off, none of the flow sensors 30, 32 responds. If the ball 14 is in position II, then only the flow sensor 32 detects a signal which is passed to the control unit 20 via a signal line 33. In position III, only the flow sensor 30 detects a signal which is sent to the control unit 20 via a signal line 34. In position I, both the first and second flow sensors 30, 32 detect a signal.
  • a malposition of the switching valve 8 is detected by comparing the signals received from the flow sensors 30, 32 and the signals to be expected at the desired position.
  • misalignment e.g. a renewed switching of the switching valve 8 by means of the circulation pump 6 is made, as described above to a detected deviation on the basis of the measured with the pressure sensor 21 liquid level.
  • a pressure sensor is used instead of the flow sensors 30, 31, a pressure change can be detected on account of the dynamic pressure arising in the lines 9, 10, and thus also whether the lines 9, 10 are flushed with flushing liquid. A malposition of the switching valve 8 can then accordingly, as described for the flow sensors 30, 32 are detected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
EP08020671A 2001-07-18 2002-05-21 Appareil ménager doté d'un dispositif de distribution de liquide réglable et son procédé de contrôle Withdrawn EP2052665A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001134916 DE10134916A1 (de) 2001-07-18 2001-07-18 Haushaltsgerät mit einer einstellbaren Flüssigkeitsverteilungseinrichtung und Verfahren zu deren Kontrolle
EP20020010281 EP1277431B1 (fr) 2001-07-18 2002-05-21 Appareil domestique avec un dispositif de distributeur de liquide réglable et son procédé de commande

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP20020010281 Division EP1277431B1 (fr) 2001-07-18 2002-05-21 Appareil domestique avec un dispositif de distributeur de liquide réglable et son procédé de commande

Publications (1)

Publication Number Publication Date
EP2052665A1 true EP2052665A1 (fr) 2009-04-29

Family

ID=7692198

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08020671A Withdrawn EP2052665A1 (fr) 2001-07-18 2002-05-21 Appareil ménager doté d'un dispositif de distribution de liquide réglable et son procédé de contrôle
EP20020010281 Expired - Fee Related EP1277431B1 (fr) 2001-07-18 2002-05-21 Appareil domestique avec un dispositif de distributeur de liquide réglable et son procédé de commande

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20020010281 Expired - Fee Related EP1277431B1 (fr) 2001-07-18 2002-05-21 Appareil domestique avec un dispositif de distributeur de liquide réglable et son procédé de commande

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EP (2) EP2052665A1 (fr)
DE (3) DE10134916A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050102457A (ko) * 2004-04-22 2005-10-26 엘지전자 주식회사 식기 세척기의 과급수 방지구조 및 방법
KR101526987B1 (ko) * 2008-08-21 2015-06-11 엘지전자 주식회사 식기 세척기 및 그 제어방법
IT1395418B1 (it) * 2009-09-07 2012-09-14 Bitron Spa Procedimento per il controllo del funzionamento di una macchina lavastoviglie.
DE102010043328A1 (de) * 2010-11-03 2012-05-03 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben eines wasserführenden Haushaltsgeräts
DE102011000287B4 (de) * 2011-01-24 2014-09-11 Miele & Cie. Kg Verfahren zur Einstellung eines von einer Umwälzpumpe in einem wasserführenden Haushaltgerät geförderten Volumenstroms
DE102013226637A1 (de) 2013-12-19 2015-06-25 Meiko Maschinenbau Gmbh & Co. Kg Reinigungsvorrichtung und Verfahren zur Reinigung von Reinigungsgut
DE102018209076A1 (de) * 2018-06-07 2019-12-12 BSH Hausgeräte GmbH Geschirrspülmaschine, Verfahren zum Betreiben einer Geschirrspülmaschine und Computerprogrammprodukt

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237994A2 (fr) * 1986-03-19 1987-09-23 INDUSTRIE ZANUSSI S.p.A. Lave-vaisselle avec une soupape de distribution dans le cycle du liquide
EP0534213A1 (fr) * 1991-09-26 1993-03-31 ZANUSSI GRANDI IMPIANTI S.p.A. Dispositif de contrôle des cycles de lavage et rinçage pour machines à laver la vaisselle
DE19828768A1 (de) * 1998-06-27 2000-01-05 Aeg Hausgeraete Gmbh Geschirrspülmaschine mit einer Umwälzpumpe und Verfahren zum Betreiben derselben
FR2789451A1 (fr) * 1999-02-08 2000-08-11 Siebe Appliance Controls Sa Dispositif de commande de l'orientation d'un fluide
WO2001003568A1 (fr) 1999-07-13 2001-01-18 Electrolux Zanussi S.P.A. Lave-vaisselle ameliore avec vanne de distribution de liqueur
EP1088509A1 (fr) * 1999-10-01 2001-04-04 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle domestique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237994A2 (fr) * 1986-03-19 1987-09-23 INDUSTRIE ZANUSSI S.p.A. Lave-vaisselle avec une soupape de distribution dans le cycle du liquide
EP0237994B1 (fr) 1986-03-19 1991-06-12 INDUSTRIE ZANUSSI S.p.A. Lave-vaisselle avec une soupape de distribution dans le cycle du liquide
EP0534213A1 (fr) * 1991-09-26 1993-03-31 ZANUSSI GRANDI IMPIANTI S.p.A. Dispositif de contrôle des cycles de lavage et rinçage pour machines à laver la vaisselle
DE19828768A1 (de) * 1998-06-27 2000-01-05 Aeg Hausgeraete Gmbh Geschirrspülmaschine mit einer Umwälzpumpe und Verfahren zum Betreiben derselben
FR2789451A1 (fr) * 1999-02-08 2000-08-11 Siebe Appliance Controls Sa Dispositif de commande de l'orientation d'un fluide
WO2001003568A1 (fr) 1999-07-13 2001-01-18 Electrolux Zanussi S.P.A. Lave-vaisselle ameliore avec vanne de distribution de liqueur
EP1088509A1 (fr) * 1999-10-01 2001-04-04 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle domestique

Also Published As

Publication number Publication date
EP1277431B1 (fr) 2008-12-03
DE20122927U1 (de) 2010-04-08
DE50213070D1 (de) 2009-01-15
EP1277431A1 (fr) 2003-01-22
DE10134916A1 (de) 2003-04-24

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