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DE19505414C2 - Method for detecting an error in the water inlet or water outlet of a program-controlled washing machine or dishwasher - Google Patents

Method for detecting an error in the water inlet or water outlet of a program-controlled washing machine or dishwasher

Info

Publication number
DE19505414C2
DE19505414C2 DE19505414A DE19505414A DE19505414C2 DE 19505414 C2 DE19505414 C2 DE 19505414C2 DE 19505414 A DE19505414 A DE 19505414A DE 19505414 A DE19505414 A DE 19505414A DE 19505414 C2 DE19505414 C2 DE 19505414C2
Authority
DE
Germany
Prior art keywords
program
washing machine
error
dishwasher
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE19505414A
Other languages
German (de)
Other versions
DE19505414A1 (en
Inventor
Gerald Fuechtjohann
Ernst Hokamp
Christian Beier
Michael Finke
Heinz Maas
Wilfried Schaeffersmann
Rudolf Herden
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to DE19505414A priority Critical patent/DE19505414C2/en
Publication of DE19505414A1 publication Critical patent/DE19505414A1/en
Application granted granted Critical
Publication of DE19505414C2 publication Critical patent/DE19505414C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08Liquid supply or discharge arrangements
    • D06F39/081Safety arrangements for preventing water damage
    • D06F39/082Safety arrangements for preventing water damage detecting faulty draining operations, e.g. filter blockage, faulty pump
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00Control of operations performed in washing machines or washer-dryers 
    • D06F33/30Control of washing machines characterised by the purpose or target of the control 
    • D06F33/47Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/14Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18Washing liquid level
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58Indications or alarms to the control system or to the user
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14Arrangements for detecting or measuring specific parameters
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/28Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
    • D06F34/32Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress characterised by graphical features, e.g. touchscreens

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Washing And Drying Of Tableware (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Erkennung eines Fehlers im Wasserzulauf bzw. Wasserablauf einer programmgesteuerten Wasch- oder Geschirrspülmaschine unter Verwendung eines analogen Drucksensors als Niveausensor, welcher den Flüssigkeitsstand eines Behälters zur Aufnahme von Wasch- und Spülflüssigkeit sensiert.The invention relates to a method for detecting an error in the water supply or water drain of a program-controlled washing machine or dishwasher using an analog pressure sensor as a level sensor, which the Liquid level of a container for washing and rinsing liquid senses.

Bei Waschmaschinen der eingangs genannten Art können Fehler im Wasserzulauf durch abgesperrte Wasserhähne oder Funktionsfehler der Einlaßventile auftreten. Weitere Wasserzulauffehler sind bei Verstopfung im Bereich der Waschmittelein­ spülung möglich. Beim Auftreten solcher Fehler kann es durch ein programmbe­ dingtes Anschalten der Heizung und anschließendem Trockenheizen zu Überhit­ zungen und einer damit verbundenen Schädigung der Waschmaschine kommen. Fehler im Wasserablauf können durch Defekte an der Laugenpumpe oder Verstop­ fungen im Ablaufbereich auftreten.In washing machines of the type mentioned at the beginning, errors in the water supply can occur due to shut-off taps or malfunction of the inlet valves. Further water supply errors are due to constipation in the detergent area rinsing possible. If such errors occur, it can be caused by a program urgent switching on of the heating and subsequent dry heating to overheating tongues and damage to the washing machine. Water drainage errors can be caused by defects in the drain pump or a stop occur in the drain area.

Es ist bekannt, zur Erkennung eines Fehlers im Wasserzulauf bzw. Wasserablauf das Signal eines als Niveausensor fungierenden Druckwächters auszuwerten. Dabei wird das Erreichen eines mit dem Druckwächter meßbaren Wasserniveaus überwacht. Fehler der vorgenannten Art werden erst relativ spät erkannt, wodurch die Gefahr von Schäden an der Waschmaschine oder der Umgebung der Waschmaschine vergrößert wird.It is known that to detect a fault in the water inlet or water outlet Evaluate the signal of a pressure switch acting as a level sensor. Doing so the reaching of a water level measurable with the pressure switch is monitored. Errors of the aforementioned type are recognized relatively late, which increases the risk of Damage to the washing machine or the area around the washing machine is increased becomes.

Der Erfindung liegt daher das Problem zugrunde, ein Verfahren zur Erkennung eines Fehlers im Wasserzulauf bzw. Wasserablauf zu offenbaren, mit dem eine Reaktion auf einen solchen Fehler schneller möglich ist.The invention is therefore based on the problem of a method for recognizing a To reveal errors in the water supply or drainage with which a reaction on such a mistake is possible faster.

Erfindungsgemäß wird dieses Problem durch ein Verfahren mit den Merkmalen des Patent­ anspruchs gelöst.According to the invention, this problem is solved by a method with the features of the patent demanding solved.

Ein Ausführungsbeispiel der Erfindung ist anhand von Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigen: An embodiment of the invention is purely schematic with reference to drawings shown and will be described in more detail below. Show it:  

Fig. 1 den Programmablaufplan des Wasserzulaufs einer programmge­ steuerten Waschmaschine Fig. 1 shows the program flow chart of the water inlet of a programmable washing machine

Fig. 2 den Programmablaufplan des Wasserablaufs einer programmge­ steuerten Waschmaschine. Fig. 2 shows the program flow chart of the water flow of a programmable washing machine.

Der Aufbau einer Waschmaschine zur Durchführung des erfindungsgemäßen Ver­ fahrens ist aus der DE 44 38 760 A1 bekannt und aus diesem Grund in den Zeich­ nungen nicht näher dargestellt. Die Waschmaschine besitzt einen Laugenbehälter, in den der Wasserzulauf beim Start der Waschmaschine über ein von der Pro­ grammsteuerung geschaltetes Magnetventil erfolgt. Zum Wasserablauf fördert eine Laugenpumpe die Flüssigkeit aus dem Laugenbehälter über einen Ablauf­ schlauch. Das Einschalten des Magnetventils und der Laugenpumpe erfolgt zu­ stands- oder programmabhängig durch die Programmsteuerung. An den unteren Bereich des Laugenbehälters schließt sich eine Steigleitung an, an deren oberen Ende sich ein analoger Drucksensor befindet. Dieser gibt an die Programmsteue­ rung ein vom Druck in der Steigleitung und damit von der Wasserhöhe im Laugen­ behälter abhängiges Spannungssignal. Die Änderung dieses Spannungssignals wird während der gesamten Einschaltzeit des Magnetventils und der Laugen­ pumpe von der Programmsteuerung überwacht.The structure of a washing machine for performing the Ver driving is known from DE 44 38 760 A1 and for this reason in the drawing not shown in detail. The washing machine has a tub, into which the water inlet at the start of the washing machine via one of the Pro the solenoid valve is switched. Promotes water drainage a drain pump takes the liquid out of the tub through a drain tube. The solenoid valve and the drain pump are switched on depending on the status or program through the program control. At the bottom A riser is connected to the area of the tub, at the top There is an analog pressure sensor at the end. This gives to the program tax the pressure in the riser and thus the water level in the lye container-dependent voltage signal. The change in this voltage signal during the entire switch-on time of the solenoid valve and the alkalis pump monitored by the program control.

Ist bei eingeschaltetem Magnetventil innerhalb von 30 sec. keine Steigung des Luftdrucks erfolgt, wird eine Fehler-LED von der Programmsteuerung blinkend angesteuert. Wird nach weiteren 30 sec. immer noch keine Ansteigung des Drucks sensiert, erfolgt ein Programmabbruch. Die Fehler-LED wird gelöscht, sobald die Steigung von 10 mm WS erreicht wird.If the solenoid valve is switched on, there is no slope within 30 seconds Air pressure, an error LED flashes from the program control controlled. If after another 30 seconds there is still no rise in the If pressure is sensed, the program is terminated. The error LED is cleared as soon as the slope of 10 mm WS is reached.

Fig. 2 zeigt den Programmablaufplan des Wasserablaufs. Ein verstopftes Flusen­ filter oder eine blockierte Laugenpumpe folgt zu einer Unterbrechung des Wasser­ ablaufs. Als Reaktion hierauf erfolgt ein Stillstand im Absinken des druckproportio­ nalen Spannungssignals. Wird innerhalb von einer Zeit von 1'5'' das Niveau von 40 mm WS nicht unterschritten, wird die Fehler-LED eingeschaltet. Nach weiteren 5 Minuten erfolgt ein Programmabbruch. Die Fehleranzeige wird gelöscht, wenn das überwachte Niveau unterschritten wird. Fig. 2 shows the program flow chart of the water flow. A clogged lint filter or a blocked drain pump will interrupt the water flow. In response to this, the pressure proportional voltage signal drops to a standstill. If the level does not fall below 40 mm WS within a time of 1'5 '', the error LED is switched on. After a further 5 minutes, the program is canceled. The error display is cleared if the monitored level is undershot.

Claims (1)

Verfahren zur Erkennung eines Fehlers im Wasserzulauf bzw. Wasserablauf einer programmgesteuerten Wasch- oder Geschirrspülmaschine unter Verwendung eines analogen Drucksensors als Niveausensor, welcher den Flüssigkeitsstand eines Behälters zur Aufnahme von Wasch- und Spülflüssigkeit sensiert, dadurch gekennzeichnet, daß die Programmsteuerung ein Fehlersignal erzeugt, wenn die Änderungsgeschwin­ digkeit des Drucksignals einen vorgegebenen Grenzwert unterschreitet, wobei das Fehlersignal zunächst eine Warnanzeige steuert und bei weiterhin erzeugtem Fehlersignal anschließend ein Programmabbruch bewirkt wird.Method for detecting an error in the water supply or water drain of a program-controlled washing machine or dishwasher using an analog pressure sensor as a level sensor, which senses the liquid level of a container for holding washing and rinsing liquid, characterized in that the program control generates an error signal when the Change speed of the pressure signal falls below a predetermined limit value, the error signal initially controlling a warning display and subsequently causing the program to be terminated if the error signal continues to be generated.
DE19505414A 1995-02-17 1995-02-17 Method for detecting an error in the water inlet or water outlet of a program-controlled washing machine or dishwasher Expired - Fee Related DE19505414C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19505414A DE19505414C2 (en) 1995-02-17 1995-02-17 Method for detecting an error in the water inlet or water outlet of a program-controlled washing machine or dishwasher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19505414A DE19505414C2 (en) 1995-02-17 1995-02-17 Method for detecting an error in the water inlet or water outlet of a program-controlled washing machine or dishwasher

Publications (2)

Publication Number Publication Date
DE19505414A1 DE19505414A1 (en) 1996-08-22
DE19505414C2 true DE19505414C2 (en) 1998-08-27

Family

ID=7754263

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19505414A Expired - Fee Related DE19505414C2 (en) 1995-02-17 1995-02-17 Method for detecting an error in the water inlet or water outlet of a program-controlled washing machine or dishwasher

Country Status (1)

Country Link
DE (1) DE19505414C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018825B4 (en) * 2003-04-22 2006-01-19 Sharp K.K. Washing machine with detection of a leak in a water supply unit
DE102008054837A1 (en) 2008-12-17 2010-06-24 BSH Bosch und Siemens Hausgeräte GmbH Clothes treatment method for use in washing machine, involves evaluating hydrostatic pressure in suds container with respect to time after which lower threshold value for pressure is obtained as measure for ending of pumping process

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641477B4 (en) * 1996-10-09 2005-10-20 Aeg Hausgeraete Gmbh Method for controlling the rinsing process of a washing machine
DE19831555B4 (en) * 1998-07-14 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH Fluid-carrying household appliance with monitoring of the drain hose
DE102006025139A1 (en) * 2006-05-30 2007-12-06 BSH Bosch und Siemens Hausgeräte GmbH Method for operating a washing machine
WO2011080225A2 (en) 2009-12-31 2011-07-07 Arcelik Anonim Sirketi A washing machine
CN114016255B (en) * 2021-11-23 2022-08-23 珠海格力电器股份有限公司 Fault detection method and device for washing machine and washing machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438760A1 (en) * 1994-10-29 1996-05-02 Miele & Cie Method for determining a load level dependent on the type of laundry and the amount of laundry

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438760A1 (en) * 1994-10-29 1996-05-02 Miele & Cie Method for determining a load level dependent on the type of laundry and the amount of laundry

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DIN 19226, Teil 2, Entw. April 85 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004018825B4 (en) * 2003-04-22 2006-01-19 Sharp K.K. Washing machine with detection of a leak in a water supply unit
DE102008054837A1 (en) 2008-12-17 2010-06-24 BSH Bosch und Siemens Hausgeräte GmbH Clothes treatment method for use in washing machine, involves evaluating hydrostatic pressure in suds container with respect to time after which lower threshold value for pressure is obtained as measure for ending of pumping process
DE102008054837B4 (en) 2008-12-17 2018-09-13 BSH Hausgeräte GmbH Method of treating laundry

Also Published As

Publication number Publication date
DE19505414A1 (en) 1996-08-22

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Legal Events

Date Code Title Description
8120 Willingness to grant licences paragraph 23
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: MIELE & CIE. KG, 33332 GUETERSLOH, DE

R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20140902