EP0704567B1 - Dispositif pour éviter le balourd dans les machines à laver le linge - Google Patents

Dispositif pour éviter le balourd dans les machines à laver le linge Download PDF

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Publication number
EP0704567B1
EP0704567B1 EP95111984A EP95111984A EP0704567B1 EP 0704567 B1 EP0704567 B1 EP 0704567B1 EP 95111984 A EP95111984 A EP 95111984A EP 95111984 A EP95111984 A EP 95111984A EP 0704567 B1 EP0704567 B1 EP 0704567B1
Authority
EP
European Patent Office
Prior art keywords
spin
speed
extraction
drum
unbalance
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
EP95111984A
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German (de)
English (en)
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EP0704567A1 (fr
Inventor
Silvio Battistella
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 Zanussi SpA
Original Assignee
Electrolux Zanussi Elettrodomestici SpA
Electrolux Zanussi SpA
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Publication date
Application filed by Electrolux Zanussi Elettrodomestici SpA, Electrolux Zanussi SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP0704567A1 publication Critical patent/EP0704567A1/fr
Application granted granted Critical
Publication of EP0704567B1 publication Critical patent/EP0704567B1/fr
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    • 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
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed
    • 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 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry

Definitions

  • the present invention refers to a clothes washing machine, such as in particular a household clothes washing machine, provided with improved arrangements capable of measuring and re-balance unbalanced washloads in the rotating drum of such washing machines when the washload undergoes spin-extraction cycles in the same machines.
  • the Italian patent application IT PN91A000020 by the same applicant teaches how to detect unbalance conditions on the basis of the phase shift between the absorbed current and the supply voltage of the drum driving motor.
  • a laundry washing machine provided with speed control means for a variable speed electric motor for rotationally driving a mass with a changeable centre of gravity
  • the speed control means comprising detecting means for detecting the degree of any eccentricity of the centre of gravity of such mass relative to the axis of rotation thereof,determining means for determining an optimum motor speed in dependence on the detected degree of any such eccentricity, and regulating circuit means for regulating the supply of operating current to such motor in dependence on the determined optimum speed.
  • Such detecting means determine the eccentricity force of the centre of gravity of the mass and feeds it as a control value to the control circuit, which in its turn delivers the target value to the regulating circuit.
  • the maximum rotational speed of the mass for example a loaded laundry drum, is optimally selected in correspondence with the eccentricity conditions.
  • a procedure is made at increasing speeds; this circumstance doesn't prevent clothes from tending to get pressed into the perforations in the wall of the drum during the intermediate spin sequence, such fact preventing to achieve the optimum laundry distribution and therefore the best overall drum balance for the subsequent spin extraction phase.
  • water will be used in a general way to also mean washing liquor or rinsing water. Such a simplification, however, will not impair the clear comprehensibility of the description owing to the particular context in which said terms are used, as anyone skilled in the art can readily appreciate.
  • the clothes washing machine being described comprises a washing tub, a drum that is rotatably mounted within said washing tub and is capable of holding the items forming the washload, a selectively actuatable drain pump, a driving motor adapted to operate at preselectably variable speeds, an arrangement adapted to detect the unbalance condition of the washload in the rotating drum, to selectively compare it with a plurality of pre-determined unbalance levels and to selectively start different actions or operation modes according to the outcome of said comparisons.
  • the arrangement monitoring the unbalance condition of the washload in the drum is then activated: if the detected unbalance condition turns out to be lower than a pre-established value B c1 , the spin-extraction phase goes on beyond said time T 2 ; if on the contrary said condition does not occur, the same spin-extraction sequence is brought back to the afore considered time T 0 , from which the just described sequence then starts again.
  • Such a procedure of low-speed rotations BV, low-speed spin-extraction phases CBV and check-ups of the unbalance condition of the washload is repeated automatically until either a lower value than the specified level B c1 is reached or the same procedure has been repeated for a pre-determined maximum number of times.
  • the just described procedure is substantially known in the art, so that it shall not be explained here any further.
  • the drum is abruptly driven to perform a spin-extraction cycle for a short impulse, which it reaches in correspondence of the time T 3 and which lasts for a very short period of time, ie. approx. 3 seconds, at an intermediate speed of usually around 450 rpm.
  • the drum RPM is slowed down to the value of the slow-speed spin-extraction sequence CBV and is kept at that value throughout the period extending from the time T 7 to the time T 8 , during which the unbalance condition of the washload is then measured and checked.
  • the washload is found to have any greater unbalance than a pre-determined level B c2 , then the whole spin-extraction phase is cycled back to the beginning, ie. to the time T 0 , since that would practically mean that the unbalance condition is still in excess of what is actually required in order to be able to safely start any further spin-extraction sequence at still higher speeds.
  • the existing unbalance condition albeit reduced in its extent, would necessarily have to be accepted as such and, at the same time, it would also be necessary that the spin-extraction speed be anyway limited to a lower value than the highest one VC max provided for by the cycle in order to avoid creating conditions of marked vibrations, with limited-amplitude, but high-frequency oscillations of the machine which, albeit not prohibitive as far as the correct operation and the integrity of the structure of the machine are concerned, would be transmitted through the base of the machine to the floor and, ultimately, the whole room.
  • the present invention may be further improved in an advantageous manner through the additions of various features.
  • the unbalance condition detected in the time interval T 7 -T 8 is found to be at a level which is below the afore cited pre-determined highest allowable level B c2 , but higher than a pre-determined intermediate level B c3 , the subsequent final spin-extraction sequence may be performed at a speed which is reduced to the value VC 1 , ie. a value which is slightly lower than the highest spin-extraction speed VC max , but anyway still adequate in order to ensure an acceptable spin-extraction result without giving rise to the undesired vibrations transmitted by the machine.
  • Figure 2 is self-explaining for anyone skilled in the art and shows a block diagram illustrating the logical flow of the various sequences of drum rotation, measurement of the washload unbalance condition, and corresponding decision concerning the step to be taken subsequently, with reference to the most important ones cited in this description.
  • the measurement of the unbalance condition which is subsequently performed during the intermediate-speed spin-extraction sequence in the time interval T 7 -T 8 has the purpose to ensure that the unbalance level of the washload is as low as to be able to keep within pre-determined limits the vibrations transmitted by the machine to the surrounding structure of the building during the subsequent high-speed final spin-extraction sequence.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Centrifugal Separators (AREA)

Claims (8)

  1. Lave-linge notamment destiné à l'usage domestique, comprenant une cuve de lavage ; un tambour logé à rotation à l'intérieur de ladite cuve de lavage, et apte à contenir la charge à laver ; un moteur adapté pour entraíner ledit tambour à des vitesses variables pouvant être présélectionnées ; et un dispositif conçu pour détecter le balourd de la charge à laver, ledit lave-linge étant adapté pour effectuer une phase d'extraction par essorage comprenant :
    a) une première séquence de révolutions du tambour dans une direction de rotation alternée, à une vitesse inférieure à la faible vitesse d'extraction par essorage (CBV),
    b) une première séquence de révolutions du tambour à faible vitesse d'extraction par essorage (CBV), afin de répartir uniformément la charge à laver sur la face interne du tambour ;
    c) une surveillance établissant si le balourd est inférieur à un premier niveau de déséquilibre prédéterminé, et une réitération des deux premières séquences si le balourd excède ledit niveau ; caractérisé par le fait que :
    d) si le balourd est inférieur audit premier niveau de déséquilibre, une impulsion d'extraction par essorage est exécutée à une vitesse intermédiaire d'extraction par essorage (CMV), pendant un très court laps de temps ; et
    e) la vitesse angulaire du tambour est ralentie jusqu'à ladite faible vitesse d'extraction par essorage (CBV), afin de maintenir l'adhérence de la charge à laver contre la paroi interne du tambour ; et
    f) la vitesse angulaire du tambour est accrue jusqu'à ladite vitesse intermédiaire d'extraction par essorage (CMV), qui est maintenue pendant un laps de temps prédéterminé ; et
    g) le ralentissement, jusqu'à la faible vitesse d'extraction par essorage (CBV), est réduit et maintenu pendant un laps de temps prédéterminé durant lequel le balourd est mesuré.
  2. Lave-linge selon la revendication 1, caractérisé par le fait que, s'il est établi que le balourd, ainsi détecté, excède une deuxième valeur préréglée (Bc2), la phase d'extraction par essorage est ramenée au début de ladite séquence initiale (T0) de faible vitesse et de rotation alternée du tambour.
  3. Lave-linge selon la revendication 2, caractérisé par le fait que, s'il est établi que ledit balourd est inférieur à ladite deuxième valeur préréglée (Bc2), tout en excédant cependant une troisième valeur préréglée (Bc3), la phase d'extraction par essorage est poursuivie à une vitesse d'extraction par essorage limitée à une valeur (VC1) qui est inférieure à la vitesse nominale maximale (Vmax) d'extraction par essorage de la machine.
  4. Lave-linge selon la revendication 2 ou 3, caractérisé par le fait que, s'il est établi que ledit balourd est inférieur à ladite troisième valeur de déséquilibre préréglée (Bc3), la phase d'extraction par essorage est poursuivie jusqu'à la vitesse nominale maximale (Vmax) d'extraction par essorage de la machine.
  5. Lave-linge selon l'une quelconque des revendications précédentes, caractérisé par le fait que ladite séquence d'équilibrage de la charge à laver, à faible vitesse d'extraction par essorage (T1-T2), qui consiste à réduire tout d'abord la vitesse angulaire du tambour jusqu'à une valeur inférieure à la vitesse minimale d'extraction par essorage, puis à accroítre de nouveau ladite vitesse jusqu'à ladite faible vitesse d'extraction par essorage (CBV), est exécutée avec répétition automatique jusqu'à ce que la charge à laver soit effectivement autorisée à se répartir de nouveau le long des parois du tambour, afin d'atteindre ledit premier niveau d'équilibrage (Bc1).
  6. Lave-linge selon l'une quelconque des revendications précédentes, caractérisé par le fait que ladite faible vitesse d'extraction par essorage (CBV) est d'approximativement 85 tr/min.
  7. Lave-linge selon l'une quelconque des revendications précédentes, caractérisé par le fait que ladite vitesse intermédiaire d'extraction par essorage (CMV) est d'approximativement 450 tr/min.
  8. Lave-linge selon l'une quelconque des revendications précédentes, caractérisé par le fait que ladite impulsion d'extraction par essorage (T3) présente une durée d'approximativement 3 secondes à une vitesse intermédiaire d'extraction par essorage.
EP95111984A 1994-09-28 1995-07-31 Dispositif pour éviter le balourd dans les machines à laver le linge Expired - Lifetime EP0704567B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN940057 1994-09-28
IT94PN000057A IT1267586B1 (it) 1994-09-28 1994-09-28 Lavabiancheria con dispositivo perfezionato anti-sbilanciamento

Publications (2)

Publication Number Publication Date
EP0704567A1 EP0704567A1 (fr) 1996-04-03
EP0704567B1 true EP0704567B1 (fr) 1999-03-24

Family

ID=11394949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111984A Expired - Lifetime EP0704567B1 (fr) 1994-09-28 1995-07-31 Dispositif pour éviter le balourd dans les machines à laver le linge

Country Status (5)

Country Link
EP (1) EP0704567B1 (fr)
JP (1) JP3681444B2 (fr)
DE (1) DE69508510T2 (fr)
ES (1) ES2132474T3 (fr)
IT (1) IT1267586B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008075987A2 (fr) * 2006-12-21 2008-06-26 Fisher & Paykel Appliances Limited Meilleur appareil de buanderie

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IT1285703B1 (it) * 1996-05-14 1998-06-18 Merloni Antonio Spa Procedimento di lavaggio anti-incollamento della biancheria al cestello, nelle macchine lavabiancheria
JPH10216391A (ja) * 1997-02-12 1998-08-18 Toshiba Corp ドラム式洗濯機
PT1088126E (pt) * 1998-04-14 2005-04-29 Tulga Simsek Uma maquina e um metodo para o equilibrio de uma tal maquina
IT1305553B1 (it) * 1998-11-10 2001-05-09 Electrolux Zanussi Elettrodome Metodo per controllare lo sbilanciamento del carico in unalavabiancheria
CN1318619C (zh) * 2004-08-30 2007-05-30 金川集团有限公司 一种钴电解液的除铜方法
FR2907134B1 (fr) * 2006-10-12 2008-12-12 Brandt Ind Sas Procede d'essorage final d'un cycle de lavage d'une machine a laver le linge
KR101428477B1 (ko) * 2007-01-24 2014-08-12 삼성전자 주식회사 세탁기 및 그 제어방법
US9416478B2 (en) 2009-03-31 2016-08-16 Lg Electronics Inc. Washing machine and washing method
AU2009327647B2 (en) 2008-12-17 2012-07-19 Fisher & Paykel Appliances Limited A laundry machine
ES2605027T3 (es) 2009-02-11 2017-03-10 Lg Electronics Inc Máquina de lavar
US9695537B2 (en) 2009-07-27 2017-07-04 Lg Electronics Inc. Control method of a laundry machine
US10533275B2 (en) 2009-07-27 2020-01-14 Lg Electronics Inc. Control method of a laundry machine
US9234307B2 (en) 2009-07-27 2016-01-12 Lg Electronics Inc. Control method of a laundry machine
US9822473B2 (en) 2009-07-27 2017-11-21 Lg Electronics Inc. Control method of a laundry machine
UA100209C2 (uk) * 2009-08-11 2012-11-26 Елджі Електронікс Інк. Спосіб керування пральною машиною (варіанти)
US8776297B2 (en) 2009-10-13 2014-07-15 Lg Electronics Inc. Laundry treating apparatus and method
CN102162031B (zh) * 2011-04-11 2012-09-05 山东交通职业学院 一种钴电解液的除铁方法
JP5978522B2 (ja) * 2012-06-19 2016-08-24 東芝ライフスタイル株式会社 洗濯乾燥機
CN110714300B (zh) * 2018-06-26 2022-08-05 青岛海尔洗衣机有限公司 用于衣物洗涤设备的平衡修正方法以及衣物洗涤设备
CN110438747B (zh) * 2019-07-12 2021-07-20 合肥美的洗衣机有限公司 衣物的识别方法、装置和衣物处理装置

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008075987A2 (fr) * 2006-12-21 2008-06-26 Fisher & Paykel Appliances Limited Meilleur appareil de buanderie
WO2008075987A3 (fr) * 2006-12-21 2008-07-31 Fisher & Paykel Appliances Ltd Meilleur appareil de buanderie
AU2007334750B2 (en) * 2006-12-21 2011-12-01 Fisher & Paykel Appliances Limited Improved laundry appliance

Also Published As

Publication number Publication date
IT1267586B1 (it) 1997-02-07
ES2132474T3 (es) 1999-08-16
ITPN940057A1 (it) 1996-03-28
JP3681444B2 (ja) 2005-08-10
ITPN940057A0 (it) 1994-09-28
JPH08112487A (ja) 1996-05-07
DE69508510D1 (de) 1999-04-29
EP0704567A1 (fr) 1996-04-03
DE69508510T2 (de) 1999-09-23

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