DE19505414A1 - Detecting fault in water supply or discharge - Google Patents

Detecting fault in water supply or discharge

Info

Publication number
DE19505414A1
DE19505414A1 DE19505414A DE19505414A DE19505414A1 DE 19505414 A1 DE19505414 A1 DE 19505414A1 DE 19505414 A DE19505414 A DE 19505414A DE 19505414 A DE19505414 A DE 19505414A DE 19505414 A1 DE19505414 A1 DE 19505414A1
Authority
DE
Germany
Prior art keywords
program
washing machine
water
detecting
fault
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.)
Granted
Application number
DE19505414A
Other languages
German (de)
Other versions
DE19505414C2 (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

    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • D06F39/082—Safety arrangements for preventing water damage detecting faulty draining operations, e.g. filter blockage, faulty pump
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/14—Indicating 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
    • 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
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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
    • 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
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
    • D06F34/32—Arrangements 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)

Abstract

A process for detecting a fault in the water supply or water discharge unit of a program-controlled washing machine or dishwasher uses a level sensor. The sensor is an analog pressure sensor and the program control unit generates a fault signal when the changing speed of the pressure signal is below a preset limit value.

Description

Die Erfindung betrifft ein Verfahren zur Erkennung eines Fehlers im Wasserzulauf bzw. Wasserablauf einer programmgesteuerten Wasch- oder Geschirrspülma­ schine unter Verwendung eines Niveausensors, 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 machine using a level sensor that measures the liquid level a container for washing and rinsing liquid.

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 anschließendes 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, wo­ durch die Gefahr von Schäden an der Waschmaschine oder der Umgebung der Waschmaschine vergrößert wird.It is known to detect a fault in the water inlet or water outlet evaluate the signal from a pressure switch that functions as a level sensor. The water level that can be measured with the pressure switch is reached supervised. Errors of the aforementioned type are only recognized relatively late where due to the risk of damage to the washing machine or the environment of the Washing machine is enlarged.

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. Erfindungsgemäß wird dieses Problem durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus weiteren Unteransprüchen.The invention is therefore based on the problem of a method for detection to reveal a fault in the water inlet or outlet with which one Response to such an error is possible faster. According to the invention, this problem is solved by a method with the features of Claim 1 solved. Advantageous refinements result from others Subclaims.

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 based on drawings is shown schematically and is 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 supply of a program controlled 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′15′′ 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 period of 1′15 ′ ′, 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 (3)

1. Verfahren zur Erkennung eines Fehlers im Wasserzulauf bzw. Wasserablauf einer programmgesteuerten Wasch- oder Geschirrspülmaschine unter Verwendung eines Niveausensors, welcher den Flüssigkeitsstand eines Behälters zur Aufnahme von Wasch- und Spülflüssigkeit sensiert, dadurch gekennzeichnet, daß als Niveausensor ein analoger Drucksensor verwendet wird und daß die Pro­ grammsteuerung ein Fehlersignal erzeugt, wenn die Änderungsgeschwindigkeit des Drucksignals einen vorgegebenen Grenzwert unterschreitet.1. A method for detecting an error in the water supply or water drain of a program-controlled washing machine or dishwasher using a level sensor which senses the liquid level of a container for holding washing and rinsing liquid, characterized in that an analog pressure sensor is used as the level sensor and that the program control generates an error signal when the rate of change of the pressure signal falls below a predetermined limit. 2. Verfahren zur Erkennung eines Fehlers im Wasserzulauf bzw. Wasserablauf einer programmgesteuerten Wasch- oder Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, daß das Fehlersignal eine Warnanzeige steuert.2. Procedure for detecting a fault in the water inlet or water outlet a program-controlled washing machine or dishwasher according to claim 1, characterized, that the error signal controls a warning display. 3. Verfahren zur Erkennung eines Fehlers im Wasserzulauf bzw. Wasserablauf einer programmgesteuerten Wasch- oder Geschirrspülmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Fehlersignal einen Programmabbruch bewirkt.3. Method for detecting a fault in the water inlet or water outlet a program-controlled washing machine or dishwasher according to claim 1 or 2, characterized, that the error signal causes a program termination.
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 true DE19505414A1 (en) 1996-08-22
DE19505414C2 DE19505414C2 (en) 1998-08-27

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0837173A1 (en) * 1996-10-09 1998-04-22 AEG Hausgeräte GmbH Method for controlling the rinsing in 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
EP1862582A2 (en) * 2006-05-30 2007-12-05 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
US7984628B2 (en) 2003-04-22 2011-07-26 Sharp Kabushiki Kaisha Washing machine capable of detecting leakage at water feed unit
CN114016255A (en) * 2021-11-23 2022-02-08 珠海格力电器股份有限公司 Fault detection method and device for washing machine and washing machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008054837B4 (en) 2008-12-17 2018-09-13 BSH Hausgeräte GmbH Method of treating laundry

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 (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0837173A1 (en) * 1996-10-09 1998-04-22 AEG Hausgeräte GmbH Method for controlling the rinsing in a washing machine
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
US7984628B2 (en) 2003-04-22 2011-07-26 Sharp Kabushiki Kaisha Washing machine capable of detecting leakage at water feed unit
EP1862582A2 (en) * 2006-05-30 2007-12-05 BSH Bosch und Siemens Hausgeräte GmbH Method for operating a washing machine
EP1862582A3 (en) * 2006-05-30 2008-06-11 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
CN114016255A (en) * 2021-11-23 2022-02-08 珠海格力电器股份有限公司 Fault detection method and device for washing machine and washing machine

Also Published As

Publication number Publication date
DE19505414C2 (en) 1998-08-27

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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