EP0736625B1 - Vorrichtungen zum Vermeiden von Unwucht in einer Wäschewaschmaschine in Topladerbauweise - Google Patents

Vorrichtungen zum Vermeiden von Unwucht in einer Wäschewaschmaschine in Topladerbauweise Download PDF

Info

Publication number
EP0736625B1
EP0736625B1 EP96103921A EP96103921A EP0736625B1 EP 0736625 B1 EP0736625 B1 EP 0736625B1 EP 96103921 A EP96103921 A EP 96103921A EP 96103921 A EP96103921 A EP 96103921A EP 0736625 B1 EP0736625 B1 EP 0736625B1
Authority
EP
European Patent Office
Prior art keywords
drum
washload
lid
unbalance
washing machine
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
EP96103921A
Other languages
English (en)
French (fr)
Other versions
EP0736625A1 (de
Inventor
Silvio Battistella
Silvano Cimetta
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
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 Zanussi Elettrodomestici SpA, Electrolux Zanussi SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP0736625A1 publication Critical patent/EP0736625A1/de
Application granted granted Critical
Publication of EP0736625B1 publication Critical patent/EP0736625B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 present invention refers to a clothes washing machine provided with a cylindrical drum arranged to rotate about a horizontal axis and having an opening in its outer side mantle, and with improved means adapted to measure and balance unbalanced washloads in the drum of such clothes washing machines during the execution of spin-extraction phases, without any need arising to make use of permanent masses to counter-balance the weight of the lid (see FR-A-2 645 553).
  • sensors of various kinds are used to measure oscillations in view of detecting the unbalance condition, whereas unbalance conditions are determined according to the patent specification J 6013 2598 by comparing the rotating speed of the drum against a pre-determined reference rotating speed profile that is stored in advance in the system's memory.
  • said lid along with the opening, locking and reinforcement means associated therewith, generates an additional mass whose weight can reasonably be considered to amount to approx. 500 to 600 gr.
  • the second drawback refers to the need arising to reinforce the lid.
  • the latter tends to quite evenly distribute all along the inner periphery of the cylindrical mantle of the drum, and therefore also in corrispondence of the loading lid, which, as a consequence, must be able to withstand the centrifugal force imparted to the corresponding portion of washload and must therefore be strengthened accordingly in its various load-bearing elements, such as hinges, walls, pins, etc.
  • this adds significantly to the manufacturing costs, too.
  • the clothes washing machine being described comprises a drum 2 rotating within a washing tub (not shown) and adapted to hold the washload 1, a lid 3 that can be opened to introduce the washload into the drum, a pre-selectably variable-speed driving motor, a plurality of rib-like elevators 4 adapted to favour the agitation of the washload, means adapted to detect the unbalance condition of the washload in the drum and selectively compare it against a plurality of pre-defined unbalance levels, as well as selectively perform different operations in accordance with the outcome of such comparisons.
  • a balancing mass 8 is associated to the rib-like elevator arranged in the opposite position with respect to the lid.
  • a machine arranged in such a manner is generally known, so that it will not be described here any longer.
  • the machine is provided with means (not shown) adapted to identify the rotational position of the drum with respect to the position of the lid, as well as control and actuation means adapted to receive and process the information concerning said position and generate corresponding control signals for the driving motor to start driving the drum at high spin-extraction speed.
  • means for identifying the position of the lid may be anyone among the various devices available and currently used to such a purpose, such as for instance a proximity sensor installed in the machine and adapted to co-operate with a corresponding appendix rotating with the drum, or a photoelectric cell adapted to detect the passage of a corresponding opaque element rotating with the drum.
  • Such elements defining the position of the rotating drum may also be mounted on means that rotate synchronically therewith, such as for instance the pulley associated therewith or the driving belt, provided that the position of the drum is in any case detected univocally.
  • the afore mentioned control and actuation means becomes activated to cause the drum to be driven for a pre-determined period at a sufficiently low speed of rotation, typically in the vicinity of 35 rpm, so as to prevent the washload items from getting distributed along the inner wall of the drum and enable them on the contrary to substantially collect on the bottom portion of the drum as they fall there by gravity and keep rolling there so as to maintain their lowest position.
  • the control means enables the position sensor to operate, so that when the latter conveys the signal indicating that the drum is in a position in which the lid is on top, this means that, at exactly that moment, the lid and the washload are positioned opposite to each other.
  • the washload acts as a lid-balancing mass, so that the overall unbalance is correspondingly reduced. And this is exactly the moment selected by the control means for actuating the driving motor so as to cause the drum to start rotating at high spin-extraction speed.
  • the drum only gradually manages to reach a spin-extraction speed of rotation which is sufficient to cause the washload item to keep sticking against the wall of the dum along the inner periphery thereof, so that a certain period of time, not very long indeed, but nevertheless quite appreciable, generally elapses from the moment in which the rotation at high spin-extraction speed is started, to the moment in which the washload items are actually sticking firmly against the wall of the drum.
  • the above described invention can be used to best advantage in machines with relatively low spin-extraction speeds of the drum. Unfortunately, however, the residual unbalance that remains in some cases may still prove excessive, ie. objectionable, in the presence of machines with drums rotating at high speeds during spin-extraction, so that an advantageous improvement of the same invention lies in combining the use of the well-known and currently applied unbalance detection technique and the elimination of the weight used to counterbalance the mass of the lid.
  • the washing machine is provided with means for detecting the unbalance condition, which are in turn associated to control and actuation means that, before any spin-extraction phase is started, activates the driving motor so as to cause the drum to rotate at a low speed V 1 , typically at approx. 85 rpm, which is however sufficient to cause the washload items to distribute along the inner periphery of the drum.
  • V 1 typically at approx. 85 rpm
  • the unbalance detecting means are activated, which preferably operate on the basis of the current absorbed by the motor.
  • the unbalance measured in this way will obviously be the overall unbalance brought about by the distribution of the washload items, which is usually quite uneven, and the presence of the mass of the lid.
  • control and actuation means are pre-arranged so as to be adapted to carry out the following sequence:
  • the sequence is returned to the starting point of the whole procedure, with the drum caused to slow down to a rotation speed V 0 , in correspondence of which the washload falls on to the bottom of the drum and the above described sequence is then started again.
  • a procedure of drum revolutions at low speed V 0 , drum revolutions at a higher speed V 1 and drum load balance controls is repeated automatically until a value is reached which is lower than the pre-set level B c1 , or until a pre-determined maximum number of repetitions of the same procedure has been completed.

Landscapes

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

Claims (2)

  1. Waschmaschine für Kleidung, versehen mit:
    einer Waschwanne,
    einer zylindrischen Trommel, die sich um eine horizontale Achse in der Wanne dreht und geeignet ist, die Waschladung zu halten, die darin über einen Deckel eingelegt ist, der eine Öffnung schließt, die in einem Abschnitt der zylindrischen Oberfläche der Trommel bereitgestellt ist, die frei von jeder Masse zum Ausgleich des Gewichtes des Beladungsdeckels ist,
    einem Motor, der geeignet ist, die Trommel rotierend mit variablen und vorher auswählbaren Geschwindigkeiten anzutreiben,
    einer Einrichtung, die geeignet ist, die Position des Beladungsdeckels zu bestimmen, es zu ermöglichen, daß die Trommel sich für eine vorbestimmte Zeitperiode mit einer angemessen geringen Drehgeschwindigkeit weiterdreht, so daß es ermöglicht wird, daß die Waschladung sich im wesentlichen auf dem Boden der Trommel ansammelt und dort weiterrollt, so daß eine solche Position während der Periode der Rotation mit geringer Geschwindigkeit der Trommel beibehalten wird, dadurch gekennzeichnet, daß die Maschine imstande ist, das Schleudern zu starten, wenn die Einrichtung anzeigt, daß der Beladungsdeckel eine obere Position erreicht hat, so daß die Schleuderphase begonnen wird, wenn der Beladungsdeckel und die Waschladung gegenüberliegend zueinander in der Trommel positioniert sind.
  2. Waschmaschine für Kleidung gemäß Anspruch 1, dadurch gekennzeichnet, daß es der Trommel ermöglicht wird, die Drehung mit hoher Schleudergeschwindigkeit vor dem Zeitpunkt zu beginnen, bei dem der Beladungsdeckel seine obere Position erreicht.
EP96103921A 1995-04-06 1996-03-13 Vorrichtungen zum Vermeiden von Unwucht in einer Wäschewaschmaschine in Topladerbauweise Expired - Lifetime EP0736625B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN950021 1995-04-06
IT95PN000021A IT1282416B1 (it) 1995-04-06 1995-04-06 Lavabiancheria a carica dall'alto con mezzi perfezionati anti-sbilanciamento

Publications (2)

Publication Number Publication Date
EP0736625A1 EP0736625A1 (de) 1996-10-09
EP0736625B1 true EP0736625B1 (de) 1999-11-10

Family

ID=11395012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103921A Expired - Lifetime EP0736625B1 (de) 1995-04-06 1996-03-13 Vorrichtungen zum Vermeiden von Unwucht in einer Wäschewaschmaschine in Topladerbauweise

Country Status (4)

Country Link
EP (1) EP0736625B1 (de)
DE (1) DE69605073T2 (de)
ES (1) ES2141409T3 (de)
IT (1) IT1282416B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8984693B2 (en) 2010-12-10 2015-03-24 Whirlpool Corporation Method and apparatus for redistributing an imbalance in a laundry treating appliance
US9267225B2 (en) 2011-12-22 2016-02-23 Whirlpool Corporation Method of estimating bending moment of a laundry treating appliance drum shaft using a proximity sensor
US9279206B2 (en) 2011-03-30 2016-03-08 Whirlpool Corporation Method and apparatus for forming a counterbalance to an imbalance in a laundry treating appliance

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010013933B4 (de) * 2010-04-06 2011-11-24 Diehl Ako Stiftung & Co. Kg Verfahren zum Betrieb eines Wäschebehandlungsgerätes
CN112342736A (zh) * 2019-08-08 2021-02-09 青岛海尔洗衣机有限公司 洗涤设备及其控制方法、存储设备、处理设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1038355B (it) * 1975-05-22 1979-11-20 Ire Spa Procedimento e macchina automatica per lavare e centrifugare la biancheria
DE3039315C2 (de) * 1980-10-17 1984-10-31 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Schaltungsanordnung zur Stromversorgung eines drehzahlregelbaren Elektromotors
DE3822924C1 (de) * 1988-07-07 1989-11-23 Miele & Cie Gmbh & Co, 4830 Guetersloh, De
DE3911124A1 (de) * 1989-04-06 1990-10-11 Licentia Gmbh Trommeldrehzahl-steuerungsverfahren fuer haushaltwaschmaschinen und vorrichtung zur durchfuehrung des verfahrens
FR2656010B1 (fr) * 1989-12-15 1992-02-28 Ciapem Procede d'arret d'un tambour d'un lave-linge mettant le portillon du tambour en vis-a-vis de la porte du lave-linge et lave-linge mettant en óoeuvre un tel procede.
FR2666826B1 (fr) * 1990-09-14 1992-10-23 Ciapem Machine a tambour horizontal rotatif a position predeterminee a l'arret.
IT1244989B (it) * 1991-01-11 1994-09-13 Merloni Elettrodomestici Spa Lavatrice perfezionata

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8984693B2 (en) 2010-12-10 2015-03-24 Whirlpool Corporation Method and apparatus for redistributing an imbalance in a laundry treating appliance
US9279206B2 (en) 2011-03-30 2016-03-08 Whirlpool Corporation Method and apparatus for forming a counterbalance to an imbalance in a laundry treating appliance
US9267225B2 (en) 2011-12-22 2016-02-23 Whirlpool Corporation Method of estimating bending moment of a laundry treating appliance drum shaft using a proximity sensor

Also Published As

Publication number Publication date
DE69605073D1 (de) 1999-12-16
ITPN950021A0 (it) 1995-04-06
EP0736625A1 (de) 1996-10-09
IT1282416B1 (it) 1998-03-23
ITPN950021A1 (it) 1996-10-06
DE69605073T2 (de) 2000-03-16
ES2141409T3 (es) 2000-03-16

Similar Documents

Publication Publication Date Title
KR100403247B1 (ko) 드럼식 세탁기
JP3030228B2 (ja) 遠心脱水装置
US4991247A (en) Method of balancing a container which rotates about an essentially horizontal axis
EP0792963B1 (de) Schleuder
EP1538251B1 (de) Waschmaschine und Steuerungsverfahren dafür
EP1297209B1 (de) Vorauswuchten einer waschmaschine bei niedriger drehgeschwindigkeit
JP3625791B2 (ja) ドラム式洗濯機
US6418758B1 (en) Washing machine
US6047428A (en) Method for detecting an unbalanced drum in a drum type washing machine
US3235082A (en) Laundry machine and method
AU2007261687B2 (en) Laundry machine control system for load imbalance detection and extraction speed selection
EP2000576A2 (de) Waschmaschine und Verfahren zu ihrer Steuerung
EP0704567B1 (de) Vorrichtung zum Vermeiden der Unwucht in Wäschewaschmaschinen
EP2094893B1 (de) Verfahren zur bestimmung des gewichts der last in einer waschmaschine mit trockner anhand der eigenfrequenzreaktion der beladenen trommel
EP2826906B1 (de) Waschmaschine und steuerungsverfahren dafür
US7039976B2 (en) Braking control system for a washing machine
EP0736625B1 (de) Vorrichtungen zum Vermeiden von Unwucht in einer Wäschewaschmaschine in Topladerbauweise
JP3865791B2 (ja) ドラム式洗濯機
KR101309295B1 (ko) 드럼 세탁기
KR101154953B1 (ko) 드럼세탁기의 탈수제어방법
JP3143355B2 (ja) 遠心脱水装置
JP3108350B2 (ja) 遠心脱水装置
JP2000140481A (ja) ドラム式洗濯機
KR100617223B1 (ko) 드럼세탁기의 수위겸 진동량 감지장치와 그에 따른 구동부제어방법
JPH07308481A (ja) 全自動洗濯機

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19970219

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ELECTROLUX ZANUSSI S.P.A.

17Q First examination report despatched

Effective date: 19981106

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

REF Corresponds to:

Ref document number: 69605073

Country of ref document: DE

Date of ref document: 19991216

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2141409

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20130321

Year of fee payment: 18

Ref country code: DE

Payment date: 20130321

Year of fee payment: 18

Ref country code: FR

Payment date: 20130408

Year of fee payment: 18

Ref country code: ES

Payment date: 20130314

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20130327

Year of fee payment: 18

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69605073

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140313

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20141128

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69605073

Country of ref document: DE

Effective date: 20141001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140313

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141001

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140313

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20150428

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140314