EP0236857B1 - Method for correcting the admissible out-of-balance degree of a programme-controlled washing machine - Google Patents

Method for correcting the admissible out-of-balance degree of a programme-controlled washing machine Download PDF

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Publication number
EP0236857B1
EP0236857B1 EP87102685A EP87102685A EP0236857B1 EP 0236857 B1 EP0236857 B1 EP 0236857B1 EP 87102685 A EP87102685 A EP 87102685A EP 87102685 A EP87102685 A EP 87102685A EP 0236857 B1 EP0236857 B1 EP 0236857B1
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EP
European Patent Office
Prior art keywords
articles
admissible
balance degree
washed
spun
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 - Lifetime
Application number
EP87102685A
Other languages
German (de)
French (fr)
Other versions
EP0236857A2 (en
EP0236857A3 (en
Inventor
Franz-Josef Ing. Wipperfürth (grad.)
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Licentia Patent Verwaltungs GmbH
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Licentia Patent Verwaltungs GmbH
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Publication date
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0236857A2 publication Critical patent/EP0236857A2/en
Publication of EP0236857A3 publication Critical patent/EP0236857A3/en
Application granted granted Critical
Publication of EP0236857B1 publication Critical patent/EP0236857B1/en
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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/16—Imbalance
    • 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 
    • D06F33/48—Preventing or reducing imbalance or noise
    • 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
    • D06F2103/26—Imbalance; Noise level

Definitions

  • the invention relates to a method for correcting the unbalance size limit value for a program-controlled washing machine with a motor-driven washing and spinning drum, in which the amount of laundry to be washed and a limit value for the amount of unbalance are stored in the program control unit, and the actual value fluctuations in the drive motor speed are determined and with during the spun material distribution phase the stored parameters are compared and then the unbalance size limit is corrected.
  • a method for controlling the spinning process in a washing machine is known from DE-A-34 16 639.
  • This washing machine has a program control unit (microcomputer) with a memory in which data influencing the spin process, such as the amount of laundry, the supply voltage and a previously determined unbalance value limit value are stored.
  • the program control unit is supplied with various measured values, such as the speed or current consumption behavior of the drive motor and the instantaneous value of the supply voltage. These measured values are then compared with the data stored in the memory and evaluated. The result of this evaluation then determines the further course of the spinning process.
  • the respective type of laundry of the centrifuge is not taken into account, but its absorbency has a significant influence on the symmetrical base load in the washing and. Centrifugal drum, so that this process is not yet considered to be optimal.
  • a method for controlling the spin program in a washing machine is known from DE-A-26 20 464, in which an unbalance measurement is carried out, which then determines the further course of the spin program.
  • the fluctuations in the current consumption or the speed of the washing and centrifugal drum drive motor are evaluated as an indication of a possible imbalance of the washing and centrifuging drum. If an unbalance greater than the entered unbalance size limit value is set, the drive motor is controlled via a speed control device such that the items to be washed or centrifuged can be redistributed. If this does not lead to success after several attempts, the speed is reduced to a lower speed.
  • a disadvantage of the known method is that the imbalance detection is very inaccurate and does not guarantee an optimal centrifugal process under all possible operating conditions.
  • the invention is based on the object of addressing a method for correcting the unbalance size limit value, by means of which an automatic optimization to a maximum spin speed and thus optimal dewatering of the spin or wash items with low or minimal wash item imbalance in the washing and centrifuging drum is achieved .
  • the object is achieved according to the invention in that the actual value fluctuations in the drive motor speed are determined during the centrifugal material distribution phase and in that the unbalance size limit value entered in the program control unit is corrected on the basis of the parameters entered into the program control unit, such as the type of laundry and quantity of laundry, or on the basis of the measured quantity of laundry and the type of laundry entered.
  • the actual value fluctuations in the speed of the drive motor for the washing and centrifuging drums, which are determined during the distribution phase of the centrifuged material thus represent the measure or the unbalance variable for the centrifugal material distribution symmetrical base load and spin speed in the washing and spinning drum.
  • This symmetrical base load is in turn dependent on the absorbency and / or the quantity of the items to be washed or spun, so that the unbalance size determined with the aid of the determined fluctuations in the actual value can be corrected with a laundry type and laundry quantity correction factor which is greater than 1. This ensures that the centrifuging time is optimized in relation to the centrifuge distribution in the centrifugal drum.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Korrektur des Unwuchtgrößenerenzwertes für eine programmgesteuerte Waschmaschine mit einer motorisch angetriebenen Wasch- und Schleudertrommel, bei der in der Programmsteuereinheit als Parameter die Waschgutmenge und ein Unwuchtgrößengrenzwert für das Schleudergut abgelegt sind und während der Schleudergutverteilungsphase die Istwertschwankungen der Antriebsmotordrehzahl ermittelt und mit den abgelegten Parametern verglichen werden und danach der Unwuchtgrößengrenzwert korrigiert wird.The invention relates to a method for correcting the unbalance size limit value for a program-controlled washing machine with a motor-driven washing and spinning drum, in which the amount of laundry to be washed and a limit value for the amount of unbalance are stored in the program control unit, and the actual value fluctuations in the drive motor speed are determined and with during the spun material distribution phase the stored parameters are compared and then the unbalance size limit is corrected.

Ein Verfahren zur Steuerung des Schleudervorganges bei einer Waschmaschine ist aus der DE-A-34 16 639 bekannt. Diese Waschmaschine hat eine Programmsteuereinheit (Microcomputer) mit einem Speicher, in dem das Schleuderverfahren beeinflussende Daten, wie die Wäschemenge, die Versorgungspannung und ein vorher ermittelter Unwuchtgrößengrenzwert abgelegt sind. Am Beginn des Schleudervorganges werden nun der Programmsteuereinheit verschiedene Meßwerte, wie z.B. das Drehzahloder Stromaufnahmeverhalten des Antriebsmotors und der augenblickliche Wert der Versorgungsspannung zugeführt. Diese Meßwerte werden dann mit den im Speicher abgelegten Daten verglichen und ausgewertet. Das Ergebnis dieser Auswertung bestimmt dann den weiteren Verlauf des Schleuderverfahrens. Bei diesem Verfahren wird aber nicht die jeweilige Wäscheart des Schleudergutes berücksichtigt, deren Saugfähigkeit aber einen erheblichen Einfluß auf die symmetrische Grundlast in der Wasch- u. Schleudertrommel hat, so daß dieses Verfahren noch nicht als optimal anzusehen ist.A method for controlling the spinning process in a washing machine is known from DE-A-34 16 639. This washing machine has a program control unit (microcomputer) with a memory in which data influencing the spin process, such as the amount of laundry, the supply voltage and a previously determined unbalance value limit value are stored. At the start of the spinning process, the program control unit is supplied with various measured values, such as the speed or current consumption behavior of the drive motor and the instantaneous value of the supply voltage. These measured values are then compared with the data stored in the memory and evaluated. The result of this evaluation then determines the further course of the spinning process. In this method, however, the respective type of laundry of the centrifuge is not taken into account, but its absorbency has a significant influence on the symmetrical base load in the washing and. Centrifugal drum, so that this process is not yet considered to be optimal.

Weiterhin ist ein Verfahren zur Steuerung des Schleuderprogramms in einer Waschmaschine aus der DE-A-26 20 464 bekannt, bei dem eine Unwuchtmessung durchgeführt wird, die dann den weiteren Ablauf des Schleuderprogramms bestimmt. Hierbei werden die Schwankungen der Stromaufnahme oder der Drehzahl des Wasch- und Schleudertrommelantriebsmotors als Indiz für eine evtl. vorliegende Unwucht der Wasch- und Schleudertrommel ausgewertet. Wird eine Unwucht größer als der eingegebene Unwuchtgrößengrenzwert fellgestellt, so wird über eine Drehzahlregeleinrichtung der Antriebsmotor derart angesteuert, daß das Wasch- bzw. Schleudergut sich neu verteilen kann. Führt dies nach mehrmaligem Versuch nicht zum Erfolg, so wird auf eine niedere Drehzahl heruntergefahren. Ein Nachteil beim bekannten Verfahren besteht jedoch darin, daß die Unwuchterfassung nur sehr ungenau erfolgt und nicht bei allen möglichen Betriebsbedingungen einen optimalen Schleuderablauf gewährleistet.Furthermore, a method for controlling the spin program in a washing machine is known from DE-A-26 20 464, in which an unbalance measurement is carried out, which then determines the further course of the spin program. The fluctuations in the current consumption or the speed of the washing and centrifugal drum drive motor are evaluated as an indication of a possible imbalance of the washing and centrifuging drum. If an unbalance greater than the entered unbalance size limit value is set, the drive motor is controlled via a speed control device such that the items to be washed or centrifuged can be redistributed. If this does not lead to success after several attempts, the speed is reduced to a lower speed. A disadvantage of the known method, however, is that the imbalance detection is very inaccurate and does not guarantee an optimal centrifugal process under all possible operating conditions.

Ferner ist es bekannt, um während der Endschleuderphase in der Wasch-und Schleudertrommel eine niedrige und somit noch vertretbare Unwucht zu haben, von vornherein einen niederen Unwuchtgrenzwert dem Programm vorzugeben. Die Folge davon ist die, daß auch bei einer minimalen Wäscheunwucht mit einer an sich nicht erforderlichen niedrigen Drehzahl bzw.durch das mehrmalige Neuverteilen des Schleudergutes mit einer langen Schleuderzeit gearbeitet wird.Furthermore, in order to have a low and thus still acceptable unbalance in the washing and spinning drum during the final spinning phase, it is predetermined from the outset to the program a lower unbalance limit. The consequence of this is that even with a minimal laundry imbalance with a low speed which is not required per se or because of the repeated redistribution of the centrifuge material, a long spin time is used.

Der Erfindung liegt nun die Aufgabe zu Grunde, ein Verfahren zur Korrektur des Unwuchtgrößengrenzwertes anzugehen, durch welches eine automatische Optimierung auf eine maximale Schleuderdrehzahl und damit optimale Entwässerung des Schleuder- bzw. Waschgutes bei geringer bzw. minimaler Waschgutunwucht in der Wasch- und Schleudertrommel erreicht wird.The invention is based on the object of addressing a method for correcting the unbalance size limit value, by means of which an automatic optimization to a maximum spin speed and thus optimal dewatering of the spin or wash items with low or minimal wash item imbalance in the washing and centrifuging drum is achieved .

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß während der Schleudergutverteilungsphase die Istwertschwankungen der Antriebsmotordrehzahl ermittelt werden, und daß auf Grund der der Programmsteuereinheit eingegebenen Parameter, wie Wäscheart und Waschgutmenge oder auf Grund des gemessenen Waschgutmengenistwertes und eingegebenen Wäscheart der der Programmsteuereinheit eingegebene Unwuchtgrößengrenzwert korrigiert wird. Die Istwertschwankungen der Drehzahl des Antriebsmotors für die Wasch- und Schleudertrommel, die während der Verteilungsphase des Schleudergutes ermittelt werden, stellen damit das Maß bzw. die Unwuchtgröße für die Schleudergutverteilung dar. Die Istwertschwankungen der Drehzahl sind bei gleicher Einzelunwucht um so kleiner, je größer die symetrische Grundlast und Schleuderdrehzahl in der Wasch- und Schleudertrommel ist. Diese symetrische Grundlast ist wiederum abhängig von der Saugfähigkeit und/oder der Menge des Wasch- bzw. Schleudergutes, so daß die mit Hilfe der festgestellten Istwertschwankungen ermittelte Unwuchtgröße mit einem Wäscheart- und Wäschemengenkorrekturfaktor, der größer als 1 ist, korrigiert werden kann. Damit wird erreicht, daß die Schleuderzeit bezogen auf die Schleudergutverteilung in der Schleudertrommel optimiert wird.The object is achieved according to the invention in that the actual value fluctuations in the drive motor speed are determined during the centrifugal material distribution phase and in that the unbalance size limit value entered in the program control unit is corrected on the basis of the parameters entered into the program control unit, such as the type of laundry and quantity of laundry, or on the basis of the measured quantity of laundry and the type of laundry entered. The actual value fluctuations in the speed of the drive motor for the washing and centrifuging drums, which are determined during the distribution phase of the centrifuged material, thus represent the measure or the unbalance variable for the centrifugal material distribution symmetrical base load and spin speed in the washing and spinning drum. This symmetrical base load is in turn dependent on the absorbency and / or the quantity of the items to be washed or spun, so that the unbalance size determined with the aid of the determined fluctuations in the actual value can be corrected with a laundry type and laundry quantity correction factor which is greater than 1. This ensures that the centrifuging time is optimized in relation to the centrifuge distribution in the centrifugal drum.

Claims (2)

  1. Method for correcting the admissible out-of-balance degree of a programme-controlled washing machine comprising a motor-driven washing and spinning drum, in which the quantity of articles to be washed and an admissible out-of-balance degree for the articles to be spun are given as parameters in the programme control unit and the actual fluctuations of the drive motor speed are determined during the phase in which the articles to be spun are distributed over the drum and are compared with the given parameters and then the admissible out-of-balance degree is corrected, characterised in that the actual fluctuations of the washing and spinning drum drive during the phase in which the articles to be spun are distributed over the drum represent the magnitude or the out-of-balance degree of the distribution of the articles to be spun and that the out-of-balance degree determined in this manner is corrected by a factor of correction for the nature and quantity of the articles to be washed greater than 1 set or measured by the user.
  2. Method for correcting the admissible out-of-balance degree of a programme-controlled washing machine comprising a motor-driven washing and spinning drum, in which the quantity of articles to be washed and an admissible out-of-balance degree for the articles to be spun are given as parameters in the programme control unit and the actual fluctuations of the drive motor speed are determined during the phase in which the articles to be spun are distributed over the drum and are compared with the given parameters and then the admissible out-of-balance degree is corrected, characterised in that the nature of the articles to be washed is entered into the programme control unit as a further parameter and the admissible out-of-balance degree is corrected on the basis of the actual measured quantity of the articles to be washed and the given nature of the articles to be washed.
EP87102685A 1986-03-03 1987-02-25 Method for correcting the admissible out-of-balance degree of a programme-controlled washing machine Expired - Lifetime EP0236857B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863606819 DE3606819A1 (en) 1986-03-03 1986-03-03 METHOD FOR CORRECTING THE UNBALANCED LIMIT VALUE FOR A PROGRAM-CONTROLLED WASHING MACHINE
DE3606819 1986-03-03

Publications (3)

Publication Number Publication Date
EP0236857A2 EP0236857A2 (en) 1987-09-16
EP0236857A3 EP0236857A3 (en) 1988-06-08
EP0236857B1 true EP0236857B1 (en) 1992-12-09

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EP87102685A Expired - Lifetime EP0236857B1 (en) 1986-03-03 1987-02-25 Method for correcting the admissible out-of-balance degree of a programme-controlled washing machine

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EP (1) EP0236857B1 (en)
DE (2) DE3606819A1 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736809A1 (en) * 1987-10-30 1989-05-11 Licentia Gmbh Method and device for measuring the drum load, in particular in domestic washing machines and spin dryers
DE3804720A1 (en) * 1988-02-15 1989-08-24 Siemens Ag METHOD FOR DIAGNOSIS OF MECHANICAL PROPERTIES OF THE ROTATING PARTS OF ROLLING MACHINES
FR2629484B1 (en) * 1988-03-29 1990-11-16 Esswein Sa IMPROVEMENT IN MEANS FOR DETECTING BALMS IN WASHING MACHINES
DE3824799A1 (en) * 1988-07-21 1990-01-25 Licentia Gmbh Control process for a laundry dryer working on the drum principle
JP2544000B2 (en) * 1990-03-30 1996-10-16 株式会社東芝 Washing machine
DE9013638U1 (en) * 1990-09-28 1990-12-06 Siemens AG, 8000 München Engine monitoring arrangement
DE4101341A1 (en) * 1991-01-18 1992-07-23 Ako Werke Gmbh & Co Frequency transverter for operating polyphase induction motor - with control electronics to set operating frequency and voltage according to ideal motor speed
DE4119902A1 (en) * 1991-06-17 1993-01-07 Elektronik Regelautomatik Drive unit for washing machines etc. - has three=phase asynchronous motor with at least 2 slots per pole and phase
DE4141213C2 (en) * 1991-12-13 1996-12-12 Bosch Siemens Hausgeraete Method for determining the dry weight of laundry, the water level and the bound liquor in a drum washing machine and washing machine for carrying out the method
DE4204046A1 (en) * 1992-02-12 1993-08-19 Licentia Gmbh Program-controlled washing machine with laundry drum - features automatic controlling water supply from difference between drum speeding-up and slowing-down times
DE4206135A1 (en) * 1992-02-28 1993-09-02 Licentia Gmbh Controlling spinning process of drum washing machine - using revolution speed control device for electric motor which is supplied with washing parameters., e.g. vol. of washing and/or type of washing, etc.
DE4221772A1 (en) * 1992-07-02 1994-01-05 Licentia Gmbh Registering imbalance in household washing machines - by measuring speed fluctations of the two reversing directions of rotation in washing and rinsing processes, etc.
DE4229646C2 (en) * 1992-09-04 1998-08-06 Bosch Siemens Hausgeraete Process for spinning wet laundry
DE4235614C2 (en) * 1992-10-22 2000-02-10 Ako Werke Gmbh & Co Procedure for determining the unbalance of a loaded washing machine drum
DE4418721A1 (en) * 1994-05-28 1995-11-30 Licentia Gmbh Control process for domestic dishwasher pump
IT1266861B1 (en) * 1994-06-16 1997-01-21 Merloni Elettrodomestici Spa METHOD FOR CHECKING THE CONDITIONS OF THE LOAD OF THE CLOTHES IN A MACHINE FOR THE WASHING AND / OR DRYING OF LINEN, AND MACHINE
IT1267586B1 (en) 1994-09-28 1997-02-07 Zanussi Elettrodomestici WASHING MACHINE WITH PERFECTED ANTI-UNBALANCING DEVICE
EP1342826A1 (en) * 2002-03-04 2003-09-10 Primus N.V. System for managing out-of-balance of loads in a laundry apparatus
KR101138888B1 (en) * 2003-11-25 2012-05-14 삼성전자주식회사 Washing Machine And Control Method Thereof
KR100977574B1 (en) 2008-05-23 2010-08-23 엘지전자 주식회사 Washing machine and method for controlling washing machine
KR101028086B1 (en) 2008-05-23 2011-04-08 엘지전자 주식회사 Washing machine and method for controlling washing machine
KR101028087B1 (en) 2008-05-23 2011-04-08 엘지전자 주식회사 Washing machine and method for controlling washing machine
KR100977576B1 (en) 2008-05-23 2010-08-23 엘지전자 주식회사 Washing machine and method for controlling washing machine
KR101028089B1 (en) 2008-05-23 2011-04-08 엘지전자 주식회사 Washing machine and method for controlling washing machine
KR100977575B1 (en) 2008-05-23 2010-08-23 엘지전자 주식회사 Washing machine and method for controlling washing machine

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IT1038355B (en) * 1975-05-22 1979-11-20 Ire Spa PROCEDURE AND AUTOMATIC MACHINE FOR WASHING AND SPINNING THE LINEN
CH651602A5 (en) * 1982-07-20 1985-09-30 Terraillon Washing machine
DE3416639A1 (en) * 1984-05-05 1985-11-07 Miele & Cie GmbH & Co, 4830 Gütersloh Process for controlling the spin programme of a washing machine

Also Published As

Publication number Publication date
EP0236857A2 (en) 1987-09-16
DE3606819A1 (en) 1987-09-10
DE3782955D1 (en) 1993-01-21
EP0236857A3 (en) 1988-06-08

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