EP0754797A1 - Verfahren und Vorrichtung zum Positionieren der Haltestellung der Trommel einer Topladerwaschmaschine - Google Patents

Verfahren und Vorrichtung zum Positionieren der Haltestellung der Trommel einer Topladerwaschmaschine Download PDF

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Publication number
EP0754797A1
EP0754797A1 EP96401568A EP96401568A EP0754797A1 EP 0754797 A1 EP0754797 A1 EP 0754797A1 EP 96401568 A EP96401568 A EP 96401568A EP 96401568 A EP96401568 A EP 96401568A EP 0754797 A1 EP0754797 A1 EP 0754797A1
Authority
EP
European Patent Office
Prior art keywords
pulses
stop
positioning
phase
drum
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
EP96401568A
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English (en)
French (fr)
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EP0754797B1 (de
Inventor
Philippe Couillaud
Jean-Claude Geay
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.)
Esswein SA
Original Assignee
Esswein SA
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Filing date
Publication date
Application filed by Esswein SA filed Critical Esswein SA
Publication of EP0754797A1 publication Critical patent/EP0754797A1/de
Application granted granted Critical
Publication of EP0754797B1 publication Critical patent/EP0754797B1/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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/302—Automatic drum positioning

Definitions

  • the present invention relates to a stationary positioning method of a rotary part driven by a universal motor, in particular the drum of a washing machine with top loading, and to a device for implementing this process.
  • the drum s 'stops in such a way that its door is just opposite the upper opening of the machine, so that the user can remove or add laundry without having to turn the drum by hand.
  • Drum positioning devices with an asynchronous motor are known, but these devices cannot be used with a motor of the so-called universal type, which generally equips current washing machines.
  • Positioning devices operating with a universal motor are also known, these devices comprising either mechanical locking means of the drum, or Hall effect sensors. These solutions are too expensive to be able to be implemented in washing machines produced in large series.
  • the present invention relates to a positioning method when a rotating part is stopped, driven in rotation by a universal motor, in particular the drum of a top-loading washing machine, making it possible to stop this drum. so that its door stops facing the upper opening of the machine (the one by which the laundry is introduced and taken out) in practically all cases of use, as quickly as possible.
  • the present invention also relates to a device for implementing this method, a device which is as inexpensive as possible.
  • the method according to the invention consists in locating the stopping point of the rotating part using an electrical output sensor, and from the start of the stopping phase of the part's engine, cutting its supply and send it controlled pulses of current, substantially regularly spaced, of increasing duration until detection of the move to the stop point, then reverse the direction of rotation if the part has not stopped at the desired position and send it other substantially regularly spaced current pulses, of increasing durations, and so on until '' at a standstill at the desired position.
  • a second positioning phase is commanded which applies to the motor another series of pulses of increasing duration, with possible change of direction of rotation at each passage through the desired position, and the sending of these pulses is stopped when the part is as close as possible to the desired position, or when this part passes for the first time of this second phase by the position sought.
  • the device for implementing the method of the invention applied to a machine comprising a rotary part driven in rotation by a universal motor, comprises a position or presence sensor, a first part of which is fixed on the rotary part and the second on the support of the rotating part, facing the first part when the rotating part is in the desired stop position, a processing circuit connected to one of the parts of the sensor, and an engine control device, connected to the sensor and comprising circuits for producing pulses of current of variable duration.
  • the present invention is described below with reference to a washing machine, but it is understood that it can be implemented in other types of machines or equipment requiring positioning precise when stopping rotating parts, such as a top-loading tumble dryer.
  • FIG 1 there is only shown the parts of the washing machine necessary for understanding the invention, namely the pulley 1 of the machine drum, its universal drive motor 2, and the belt 3 which connects them .
  • a magnet 4 is fixed on the pulley 1, near its edge, and a flexible blade switch 5 is fixed on the machine frame, so that it is just opposite and closest to the magnet 4 possible of this when the door of the drum carrying the pulley 1 is just opposite the upper opening of the washing machine.
  • the switch 5 is connected to an input of a microprocessor 6.
  • This microprocessor is either the one equipping the machine, when this is the case, or a processor dedicated to the positioning function of the drum.
  • the microprocessor 6 is connected to a circuit 7 for controlling the motor 2.
  • This circuit 7 is a power circuit which controls, in a manner known per se, under the control of the microprocessor of the machine, where it exists, or of a electromechanical programmer, the different engine speeds (start, stop, reverse direction of rotation and different speeds).
  • the microprocessor 6 also controls the circuit 7 by making it send to the motor 2 pulses of current with variable width, in the manner described below.
  • the program of the microprocessor 6 begins the positioning phase of the drum, for example after the last spin of the laundry contained in this drum.
  • the drum has stopped so that the magnet 4 is far from the switch 5.
  • This switch 5 is therefore open.
  • the microprocessor 6 passes to a first subroutine which then controls the sending by the circuit 7 of controlled pulses (allowing speed regulation) to the motor 2.
  • the first of these pulses is referenced I1.
  • the duration of this pulse I1 is for example around 200 ms, and it makes the motor 2 rotate by a certain angle.
  • I1 the magnet 4 is still far from the switch 5.
  • the microprocessor 6 commands, at time t2, the sending of a third pulse I3 to the motor 2.
  • the magnet 4 passes in front of the switch 5 at the instant t3, but that the inertia of the motor + drum assembly drives the latter a little beyond the angular position d 'stop sought.
  • the transient closing of the switch 5, taken into account by the microprocessor 6, causes it to pass to a second subroutine which commands the reversal of the direction of rotation of the motor 2 and the sending, about 2 seconds after t3, to the instant t4, of a pulse I4 of a duration of approximately 200 ms. It is assumed that shortly after t4, at time t5, when the drum stabilizes at stop, the magnet 4 is opposite the switch 5 which closes definitively. In this case, the microprocessor 6 ends the positioning program, and can advantageously signal this fact by controlling the lighting of an appropriate indicator.
  • the microprocessor 6 commands the sending of another pulse, similar to I2, and so on until the closing of the switch 5. If this closure is final, the positioning program stops. Otherwise, said first subroutine is called again, and so on.
  • the rotation speed of the drum must be relatively low (for example less than 40 rpm), so that the pulse produced by the transient closure of the switch when the magnet passes has a width sufficient to be taken into account by the electronic circuits of the microprocessor.
  • the positioning program may take a long time to stop the drum at the right angular position, or even fail to do so.
  • the invention provides, according to an advantageous aspect, to limit, for example to about one minute, the search phase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP96401568A 1995-07-21 1996-07-16 Verfahren und Vorrichtung zum Positionieren der Haltestellung der Trommel einer Topladerwaschmaschine Expired - Lifetime EP0754797B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9508863 1995-07-21
FR9508863A FR2736943B1 (fr) 1995-07-21 1995-07-21 Procede de positionnement a l'arret d'une piece rotative mue par un moteur universel, en particulier du tambour d'une machine a laver a chargement par le dessus, et dispositif de mise en oeuvre

Publications (2)

Publication Number Publication Date
EP0754797A1 true EP0754797A1 (de) 1997-01-22
EP0754797B1 EP0754797B1 (de) 2000-11-02

Family

ID=9481234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401568A Expired - Lifetime EP0754797B1 (de) 1995-07-21 1996-07-16 Verfahren und Vorrichtung zum Positionieren der Haltestellung der Trommel einer Topladerwaschmaschine

Country Status (4)

Country Link
EP (1) EP0754797B1 (de)
DE (1) DE69610799T2 (de)
ES (1) ES2151643T3 (de)
FR (1) FR2736943B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2784402A1 (fr) * 1998-10-09 2000-04-14 Elbi Int Spa Dispositif de capteur de position pour panier de machine a laver le linge
EP1111117B1 (de) * 1999-12-23 2003-07-02 Diehl AKO Stiftung & Co. KG Verfahren zum Positionieren einer Waschtrommel einer Waschmaschine in einer Zielposition

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2522343A1 (fr) * 1982-02-26 1983-09-02 Thomson Brandt Machine lave-linge
FR2611758A1 (fr) * 1987-03-06 1988-09-09 Licentia Gmbh Procede de positionnement du tambour de lavage d'un lave-linge a tambour a chargement sur le dessus
EP0387942A1 (de) * 1989-03-13 1990-09-19 Whirlpool Europe B.V. Verfahren und Vorrichtung zum Stillsetzen der Trommel einer von oben beschickbaren Waschmaschine in der Beladestellung
DE4037868A1 (de) * 1989-11-28 1991-05-29 Bosch Siemens Hausgeraete Mantelbeschickbare trommelwaschmaschine
EP0433157A1 (de) * 1989-12-15 1991-06-19 Ciapem Verfahren zur Erzielung des Trommelstillstandes einer Waschmaschine mit der Verschlussklappe der Trommel flüchtend unter dem Deckel der Waschmaschine und Waschmaschine zum Durchführen dieses Verfahrens

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2522343A1 (fr) * 1982-02-26 1983-09-02 Thomson Brandt Machine lave-linge
FR2611758A1 (fr) * 1987-03-06 1988-09-09 Licentia Gmbh Procede de positionnement du tambour de lavage d'un lave-linge a tambour a chargement sur le dessus
EP0387942A1 (de) * 1989-03-13 1990-09-19 Whirlpool Europe B.V. Verfahren und Vorrichtung zum Stillsetzen der Trommel einer von oben beschickbaren Waschmaschine in der Beladestellung
DE4037868A1 (de) * 1989-11-28 1991-05-29 Bosch Siemens Hausgeraete Mantelbeschickbare trommelwaschmaschine
EP0433157A1 (de) * 1989-12-15 1991-06-19 Ciapem Verfahren zur Erzielung des Trommelstillstandes einer Waschmaschine mit der Verschlussklappe der Trommel flüchtend unter dem Deckel der Waschmaschine und Waschmaschine zum Durchführen dieses Verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2784402A1 (fr) * 1998-10-09 2000-04-14 Elbi Int Spa Dispositif de capteur de position pour panier de machine a laver le linge
DE19948622B4 (de) * 1998-10-09 2007-08-23 Elbi International S.P.A. Stellungs-Sensorvorrichtung für die Wäschetrommel einer Maschine zur Wäschebehandlung
EP1111117B1 (de) * 1999-12-23 2003-07-02 Diehl AKO Stiftung & Co. KG Verfahren zum Positionieren einer Waschtrommel einer Waschmaschine in einer Zielposition

Also Published As

Publication number Publication date
ES2151643T3 (es) 2001-01-01
EP0754797B1 (de) 2000-11-02
DE69610799D1 (de) 2000-12-07
FR2736943A1 (fr) 1997-01-24
DE69610799T2 (de) 2001-04-26
FR2736943B1 (fr) 1997-08-22

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