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EP0468862A1 - Regelverfahren für die Rotationsgeschwindigkeit der Trommel einer Zentrifugiermaschine als Funktion der Unwucht und Maschine zur Verwendung dieses Verfahrens - Google Patents

Regelverfahren für die Rotationsgeschwindigkeit der Trommel einer Zentrifugiermaschine als Funktion der Unwucht und Maschine zur Verwendung dieses Verfahrens Download PDF

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Publication number
EP0468862A1
EP0468862A1 EP91402010A EP91402010A EP0468862A1 EP 0468862 A1 EP0468862 A1 EP 0468862A1 EP 91402010 A EP91402010 A EP 91402010A EP 91402010 A EP91402010 A EP 91402010A EP 0468862 A1 EP0468862 A1 EP 0468862A1
Authority
EP
European Patent Office
Prior art keywords
drum
speed
machine
amplitude
angle
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
EP91402010A
Other languages
English (en)
French (fr)
Other versions
EP0468862B1 (de
Inventor
Franck Berthelot
Alain Blanc
Didier Dejoux
Olivier Derbey
Jean Fioretti
Denis Girardin
Valérie Suchet
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.)
Noalia Solutions SA
Original Assignee
Thales Avionics SAS
Crouzet Appliance Controls SA
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 Thales Avionics SAS, Crouzet Appliance Controls SA filed Critical Thales Avionics SAS
Publication of EP0468862A1 publication Critical patent/EP0468862A1/de
Application granted granted Critical
Publication of EP0468862B1 publication Critical patent/EP0468862B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the present invention firstly relates to a method of controlling the speed of rotation of the drum of a centrifugal spinning machine, as a function of the unbalance of the laundry in the drum, said machine being provided with an alternating current motor. for driving said drum and a device for controlling the speed of said motor by adjusting the angle of passage of the current passing through it.
  • Such a method makes it possible to take account of the unbalance, in particular so as not to control a spin phase at too high a centrifugation speed in the event of significant unbalance. Indeed, such a spin risks causing damage when the drum rotation frequency is close to one of the mechanical resonance frequencies of the machine.
  • application FR-A-2 629 484 teaches that the value of this difference depends on both the unbalance and the total inertia of the laundry, and decreases when the latter increases.
  • Application FR-A-2 629 484 therefore proposes a method for measuring the inertia independently of the unbalance in order to take it into account. However, this complicates the process.
  • the present invention aims to overcome the above drawbacks by proposing a method which does not require the installation of additional components, which is simple, compatible with a good quality speed control, and does not require the measurement of the inertia of the linen.
  • the applicant has used the fact that, even if the speed control is of very good quality, the angle of current flow varies during a revolution in a way which is related at unbalance, since it is necessary to supply more current to the motor to raise the mass of unevenly distributed laundry than to lower it.
  • the amplitude of the variation of the angle of passage over a revolution is therefore well representative of the unbalance.
  • the method of the invention does not require additional components, the microprocessor used for speed control, and which controls the value of the passage angle being easily programmable to determine the amplitude of the variations in the passage angle .
  • said amplitude of the variation in the angle of change at speed is determined to be less than that of the spin, the amplitude is compared thus determined at a series of thresholds separated by ranges, and a spin speed value is selected as a function of the range in which said amplitude is found.
  • the present invention also relates to a machine for spinning the laundry by centrifugation, for implementing the above method, machine comprising an alternating current motor for driving said drum, a device for controlling the speed of said motor by adjusting the the angle of passage of the current passing through it, and means for controlling the speed of rotation of the drum as a function of the unbalance of the laundry in the drum, machine characterized in that it comprises means for determining the amplitude of the variation of said angle of current flow, over at least one revolution of the drum, as a quantity representative of the unbalance.
  • a washing machine and wringing machine for which the speed is to be controlled as a function of the unbalance of the laundry in the drum comprises first of all, with reference to FIG. 1, an alternating current motor 2, mounted in series here with a triac 5, the assembly being connected to an alternating voltage source 6.
  • the motor output shaft 21 drives on the one hand the drum 1 via a reduction gear 22 and on the other hand a tachometric generator 3.
  • a microprocessor-based circuit 4 receives the voltage from the source 6 via an interface circuit 64, and the output voltage from the generator 3, via an interface circuit 34.
  • Circuit 4 controls, via an interface circuit 45, the triac 5 control electrode. Circuit 4 also receives a setpoint signal PR from the programmer of the machine, which indicates to it no program we are.
  • the device which has just been described operates as follows.
  • the tacho generator 3, the circuit 4 and the triac 5 form a speed control loop which controls the triac so that the actual speed of the drum remains equal to a set value.
  • the actual speed of the drum 1 is measured using the tachometric generator which, for example comprising eight pairs of poles, delivers a sinusoid whose frequency is equal to eight times the frequency of rotation of the motor.
  • This sinusoid is transformed, in circuit 34, into a pulse train transmitted to circuit 4.
  • the latter compares the value of the frequency of this pulse train with a set value, and adjusts, in a known manner, the value of the angle of passage of the current I in the motor 2 by triggering the conduction of the triac 5 at the appropriate time.
  • FIG. 2 a the shape of the current 1 is shown during the tower portion of the drum 1 during which the laundry package 11 is to be mounted. It appears that the angle of passage of the current, noted T M , takes a relatively large value, linked to the fact that the motor 2 must provide a force to mount the laundry.
  • FIG. 2 b the shape of the current 1 is shown when the drum has turned half a turn with respect to its position in FIG. 2 a , that is to say when the laundry package 11 descends.
  • the force to be supplied by the motor is considerably reduced, which results in a significant reduction in the angle of passage of the current, which takes a value T m less than the previous value T M.
  • the quantity A represents the amplitude of the variation, over one revolution of the drum, of the angle of current flow.
  • the circuit 4 controls the motor 2 so that the speed of the drum takes an intermediate value between the washing speed and the speeds causing an effective spin.
  • the washing or rinsing speeds being a few tens of revolutions per minute, and the spinning speeds of several hundred revolutions per minute
  • the intermediate value of the speed is 100 revolutions per minute. This speed is sufficient to cause a plating of the laundry by centrifugation, and therefore to detect any imbalance, while being low enough to cause no damage, even in the event of significant imbalance.
  • circuit 4 therefore measures the amplitude A.
  • circuit 4 compares the measured value to a series of thresholds defining ranges of values, and selects a value of spin speed as a function of the range in which said value is found.
  • circuit 4 For example, for a particular type of washing machine, powered at 50 Hz, if the amplitude A, expressed here in microseconds and not in degrees, is greater than 300 microseconds, circuit 4 does not allow spinning, if amplitude A is between 270 and 300 microseconds, circuit 4 selects a spin speed equal to 300 revolutions per minute and if amplitude A is less than 270 microseconds, circuit 4 selects a spin speed equal to 900 revolutions per minute.
  • the present invention is obviously not limited to the washing machine which has just been partially described. It can also be applied to spinning or drying machines.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP91402010A 1990-07-24 1991-07-18 Regelverfahren für die Rotationsgeschwindigkeit der Trommel einer Zentrifugiermaschine als Funktion der Unwucht und Maschine zur Verwendung dieses Verfahrens Expired - Lifetime EP0468862B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9009425 1990-07-24
FR9009425A FR2665271B1 (fr) 1990-07-24 1990-07-24 Procede de commande de la vitesse de rotation du tambour d'une machine a essorage centrifuge en fonction du balourd et machine pour la mise en óoeuvre de ce procede.

Publications (2)

Publication Number Publication Date
EP0468862A1 true EP0468862A1 (de) 1992-01-29
EP0468862B1 EP0468862B1 (de) 1994-12-07

Family

ID=9399035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402010A Expired - Lifetime EP0468862B1 (de) 1990-07-24 1991-07-18 Regelverfahren für die Rotationsgeschwindigkeit der Trommel einer Zentrifugiermaschine als Funktion der Unwucht und Maschine zur Verwendung dieses Verfahrens

Country Status (3)

Country Link
EP (1) EP0468862B1 (de)
DE (1) DE69105656T2 (de)
FR (1) FR2665271B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1067230A2 (de) * 1999-06-24 2001-01-10 Ipso-Usa Kontrollsystem zum Messen der Unwucht und zur Optimierung der Schleudergeschwindigkeit in einer Waschmaschine
EP2041351A2 (de) * 2006-06-21 2009-04-01 Alliance Laundry Systems LLC Waschmaschinenkontrollsystem zur unwuchterfassung und schleudergeschwindigkeitswahl
ITTO20111137A1 (it) * 2011-12-12 2013-06-13 Indesit Co Spa Metodo e dispositivo di controllo della fase di centrifuga in un apparecchio lavabiancheria o lavasciuga, ed apparecchio lavabiancheria che implementa tale metodo.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2102985A (en) * 1981-07-31 1983-02-09 Philips Electronic Associated Drum speed control system for a washing machine
FR2524020A1 (fr) * 1982-03-26 1983-09-30 Esswein Sa Machine a laver le linge a moyens de detection de balourds
GB2124662A (en) * 1982-05-21 1984-02-22 Ti Domestic Appliances Ltd Controlling spin-dry drum speed according to drum imbalance
DE3416639A1 (de) * 1984-05-05 1985-11-07 Miele & Cie GmbH & Co, 4830 Gütersloh Verfahren zur steuerung des schleuderprogramms einer waschmaschine
FR2629484A1 (fr) * 1988-03-29 1989-10-06 Esswein Sa Perfectionnement aux moyens de detection de balourds dans les lave-linge
EP0349798B1 (de) * 1988-07-07 1992-09-02 Miele & Cie. GmbH & Co. Verfahren zur Steuerung des Schleudervorgangs einer Trommelwaschmaschine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4765161A (en) * 1987-10-19 1988-08-23 American Laundry Machinery, Inc. Out-of-balance control for laundry machines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2102985A (en) * 1981-07-31 1983-02-09 Philips Electronic Associated Drum speed control system for a washing machine
FR2524020A1 (fr) * 1982-03-26 1983-09-30 Esswein Sa Machine a laver le linge a moyens de detection de balourds
GB2124662A (en) * 1982-05-21 1984-02-22 Ti Domestic Appliances Ltd Controlling spin-dry drum speed according to drum imbalance
DE3416639A1 (de) * 1984-05-05 1985-11-07 Miele & Cie GmbH & Co, 4830 Gütersloh Verfahren zur steuerung des schleuderprogramms einer waschmaschine
FR2629484A1 (fr) * 1988-03-29 1989-10-06 Esswein Sa Perfectionnement aux moyens de detection de balourds dans les lave-linge
EP0349798B1 (de) * 1988-07-07 1992-09-02 Miele & Cie. GmbH & Co. Verfahren zur Steuerung des Schleudervorgangs einer Trommelwaschmaschine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1067230A2 (de) * 1999-06-24 2001-01-10 Ipso-Usa Kontrollsystem zum Messen der Unwucht und zur Optimierung der Schleudergeschwindigkeit in einer Waschmaschine
EP1067230A3 (de) * 1999-06-24 2002-07-24 Ipso-Usa Kontrollsystem zum Messen der Unwucht und zur Optimierung der Schleudergeschwindigkeit in einer Waschmaschine
US6564592B2 (en) 1999-06-24 2003-05-20 Ispo-Usa, Inc. Control system for measuring load imbalance and optimizing spin speed in a laundry washing machine
EP2041351A2 (de) * 2006-06-21 2009-04-01 Alliance Laundry Systems LLC Waschmaschinenkontrollsystem zur unwuchterfassung und schleudergeschwindigkeitswahl
EP2041351A4 (de) * 2006-06-21 2010-10-27 Alliance Laundry Systems Llc Waschmaschinenkontrollsystem zur unwuchterfassung und schleudergeschwindigkeitswahl
ITTO20111137A1 (it) * 2011-12-12 2013-06-13 Indesit Co Spa Metodo e dispositivo di controllo della fase di centrifuga in un apparecchio lavabiancheria o lavasciuga, ed apparecchio lavabiancheria che implementa tale metodo.
EP2604735A1 (de) * 2011-12-12 2013-06-19 Indesit Company S.p.A. Verfahren und Vorrichtung zum Steuern des Schleuderschrittes in einer Wasch- bzw. Wasch-/Trockenmaschine und Wasch- oder Wasch-/Trockenmaschine, die dieses Verfahren umsetzt

Also Published As

Publication number Publication date
FR2665271B1 (fr) 1992-11-13
FR2665271A1 (fr) 1992-01-31
DE69105656D1 (de) 1995-01-19
EP0468862B1 (de) 1994-12-07
DE69105656T2 (de) 1995-05-24

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