[go: up one dir, main page]

EP0091336B1 - Clothes washing machine with means for detecting vibrations due to unbalance - Google Patents

Clothes washing machine with means for detecting vibrations due to unbalance Download PDF

Info

Publication number
EP0091336B1
EP0091336B1 EP83400575A EP83400575A EP0091336B1 EP 0091336 B1 EP0091336 B1 EP 0091336B1 EP 83400575 A EP83400575 A EP 83400575A EP 83400575 A EP83400575 A EP 83400575A EP 0091336 B1 EP0091336 B1 EP 0091336B1
Authority
EP
European Patent Office
Prior art keywords
machine
speed
drum
error signal
control system
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
Application number
EP83400575A
Other languages
German (de)
French (fr)
Other versions
EP0091336B2 (en
EP0091336A1 (en
Inventor
Laurent Didier
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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9272464&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0091336(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Esswein SA filed Critical Esswein SA
Publication of EP0091336A1 publication Critical patent/EP0091336A1/en
Application granted granted Critical
Publication of EP0091336B1 publication Critical patent/EP0091336B1/en
Publication of EP0091336B2 publication Critical patent/EP0091336B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D06F34/08—Control circuits or arrangements thereof
    • 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 washing machine and a device for controlling the drum drive motor of such a machine.
  • the invention overcomes this drawback.
  • the machine comprising means for controlling the speed of rotation of the drum to a setpoint provided by a programmer, use is made of the difference between the actual speed of the drum and the setpoint speed to detect the imbalance. No particular detection means are therefore provided for unbalances because it is the same means and the same signal which ensures the unbalance detection and the speed regulation.
  • the assembly is such that the control is of average precision so that said deviation, or error signal, has a non-negligible value.
  • the precision of the regulation is 3 rpm, that is to say that a difference between the actual rotation speed and the set speed is only detected if it exceeds 3 rpm .
  • the error signal it is also possible to choose an engine power which is not excessively excessive.
  • the speed is measured using a tachometric generator driven by the motor and the analog signal supplied by this generator is applied to the input of a microprocessor in which, after conversion into digital form, it is compared to digital speed setpoint signals to regulate.
  • the microprocessor is also such that if the difference exceeds a determined value at the start of a spin phase, a speed decrease command is produced to stop the rotation or decrease the speed so as to remove the unbalance.
  • the washing machine comprises an electric motor 10 supplied with alternating current by means of a switching power supply comprising, in a manner known per se, a controlled switch 11 such as a triac and a circuit for control of this switch.
  • a controlled switch 11 such as a triac
  • the motor is supplied with direct current.
  • the speed of rotation of the motor 10 for driving the drum of the machine is a function of the power received by this motor, that is to say of the duration of closure of the switch 11 during a given period. .
  • This given period is for example an alternation or a half-alternation of the alternating current.
  • the switch 11 being a triac, it is such that as soon as it has received a conduction command pulse on its trigger 13, it remains conductive until the current passing through it passes through the value zero .
  • the duration of closure of the switch 11 then depends only on the instant of its closure during a half-period of the alternating current. This instant is commonly expressed as a phase shift angle 0 relative to the start of the alternation, the end of half-cycle corresponding to 180 ° ( Figure 2).
  • control pulses of the triac 11 are delivered by an interface circuit 12 receiving its input signals from the output 14 of a micro-processor 15 into which all the programming instructions of the machine have been introduced.
  • This microprocessor 15 has an input 16 receiving the analog signal supplied by a tachometer generator 17 driven by the motor shaft 10.
  • the speed setpoint instructions for the motor 10 are stored in digital form and are compared with the digital signals of real speed, obtained after an analog-digital conversion (carried out inside the microprocessor 15) of the signals supplied by the generator 17, in order to control the speed of the motor 10 to the programmed reference speed.
  • the microprocessor is thus programmed to calculate the difference ⁇ , or error signal, between the set speed V c and the actual speed V r : and this difference is converted, thanks to a table introduced into the memory of the microprocessor 15, into an angle ⁇ making it possible to close the switch 11 at each half-wave at an instant such that the error signal is minimized, the real speed being thus brought as close as possible to the set speed.
  • each speed signal is expressed by a binary number, or word, of 8 bits.
  • the speed is thus measured using 256 elements. Since the drum can rotate at 750 rpm, a speed increment corresponds to 3 rpm. In other words, the precision of the regulation is 3 revolutions / min.
  • the error signal e calculated in the microprocessor 15 is also used to detect unbalances during the acceleration of the rotation of the motor. If, during this acceleration, the error signal ⁇ exceeds a limit value ⁇ M the engine is slowed down and it is commanded to carry out a release operation and then resume its acceleration. If an unbalance is again detected, a release operation is again ordered. However, the engine is completely stopped by three unsuccessful attempts, that is to say after three tests having shown that the error signal exceeds the limit value s M. In fact, experience has shown that after three stripping operations, the probability that the laundry is distributed irregularly, and thus causes unbalances, is practically negligible.
  • the various elements of the servo being such that the error signal is not too weak, the unbalance is always detectable under good conditions. In fact, if the quality of the regulation is too high, even in the event of an imbalance, the error signal can be very weak. On the contrary by choosing a regulation quality which is not too important, the error signal ⁇ will keep a measurable value, easily exploitable for the detection of unbalances.
  • FIG. 3 is a simplified flowchart showing part of the programming of the microprocessor 15.
  • the diamonds correspond to comparisons and the rectangles to operations carried out.
  • This flowchart being an integral part of the present description, it is not necessary to describe it in detail.
  • the operation corresponding to the diamond 20 "speed increase" consists in determining if, on the one hand, the speed of the motor increases and, on the other hand, if this speed is between 50 revolutions / min (speed which corresponds to washing) and 150 rpm. It is only in the event of a positive answer to this question that the comparison is made between the error signal ⁇ and the limit value ⁇ M (diamond 21). In the example ⁇ M is of the order of 30 revolutions / min.

Landscapes

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

Description

L'invention est relative à une machine à laver le linge et à un dispositif de commande du moteur d'entrainement du tambour d'une telle machine.The invention relates to a washing machine and a device for controlling the drum drive motor of such a machine.

On sait lorsque la vitesse de rotation du tambour d'une machine à laver le linge augmente depuis une faible valeur, par exemple correspondant à la rotation pendant une phase de lavage, jusqu'à une plus grande valeur pour effecteur l'essorage, il faut prendre des précautions particulières pour éviter l'apparition de balourds dur à une répartition irrégulière du linge dans le tambour. En effet de tels bajourds provoquent des vibrations de la machine qui peuvent gravement endommager les organes de celle-ci, notamment pour une vitesse de rotation du tambour correspondant à la fréquence de résonance de la machine.We know when the rotation speed of the drum of a washing machine increases from a low value, for example corresponding to the rotation during a washing phase, to a higher value for spinning, it is necessary take special precautions to avoid the appearance of hard imbalances due to an irregular distribution of the laundry in the drum. Indeed, such bajourds cause vibrations of the machine which can seriously damage the organs thereof, in particular for a speed of rotation of the drum corresponding to the resonant frequency of the machine.

On a déjà proposé (notamment par la demande de brevet français n° 8018923 (Publication n° 2489384) au nom de la demanderesse) de détecter la présence ou l'absence de balourds lors de l'accélération du tambour au début de la phase d'essorage et, en cas de détection de balourds, de diminuer la vitesse de rotation du tambour afin de répartir de façon plus régulière le linge et ainsi supprimer ces balourds.It has already been proposed (in particular by French patent application No. 8018923 (Publication No. 2489384) in the name of the applicant) to detect the presence or absence of imbalances during acceleration of the drum at the start of the phase d 'spinning and, in the event of unbalance detection, reduce the rotation speed of the drum in order to distribute the laundry more evenly and thus remove these unbalance.

Mais les moyens utilisés jusqu'à présent pour la détection des balourds ne sont pas bon marché.However, the means used hitherto for detecting unbalances are not inexpensive.

L'invention remédie à cet inconvénient.The invention overcomes this drawback.

Elle est caractérisée en ce que la machine comportant des moyens d'asservissement de la vitesse de rotation du tambour à une consigne fornie par un programmateur, on fait appel à l'écart entre la vitesse réelle du tambour et la vitesse de consigne pour détecter le balourd. On ne prévoit ainsi pas de moyen de détection particulier pour les balourds car c'est le même moyen et le même signal qui assure la détection de balourd et la régulation de vitesse.It is characterized in that the machine comprising means for controlling the speed of rotation of the drum to a setpoint provided by a programmer, use is made of the difference between the actual speed of the drum and the setpoint speed to detect the imbalance. No particular detection means are therefore provided for unbalances because it is the same means and the same signal which ensures the unbalance detection and the speed regulation.

Dans la Demande de Brevet Européen n° 56437 déposée le 22 Octobre 1981 et publiée le 28 Juillet 1982 est décrite une machine à laver le linge dans laquelle, pour déterminer la charge et non le balourd, on fait appel à la comparaison un signal tel que la vitesse et une grandeur de consigne correspondante. Mais cette demande antérieure correspond aux situations prévues par les paragraphes 3 et 4 de l'article 54 CBE. En raison de l'article 56 CBE elle ne peut donc être prise en considération pour l'appréciation de l'activité inventive. En outre cette demande antérieure n'est opposable que pour les états désignés suivants: DE-GB-IT-.In European Patent Application n ° 56437 filed on October 22, 1981 and published on July 28, 1982 is described a washing machine in which, to determine the load and not the unbalance, a signal such as the speed and a corresponding target variable. However, this earlier request corresponds to the situations provided for in paragraphs 3 and 4 of Article 54 EPC. Owing to Article 56 EPC, it cannot therefore be taken into account for the assessment of inventive step. Furthermore, this previous request is only enforceable for the following designated states: DE-GB-IT-.

De préférence le montage est tel que l'asservissement est d'une précision moyenne afin que ledit écart, ou signal d'erreur, ait une valeur non négligeable.Preferably the assembly is such that the control is of average precision so that said deviation, or error signal, has a non-negligible value.

Ainsi on choisit délibérément une précision relativement peu importante pour l'asservissement, ce qui réduit d'autant le coût de cet asservissement et, malgré tout, apporte l'avantage de permettre une détection de balourds qui aurait été plus difficile avec un asservissement précis.Thus, a relatively unimportant precision for the servo is deliberately chosen, which reduces the cost of this servo all the more and, despite everything, brings the advantage of allowing imbalance detection which would have been more difficult with a precise servo.

Dans un exemple la précision de la régulation est de 3 tours/mn, c'est-à-dire qu'un écart entre la vitesse réelle de rotation et la vitesse de consigne n'est détecté que s'il dépasse 3 tours/ mn. Pour que la signal d'erreur ait une valeur suffisante on peut également choisir une puissance du moteur qui ne soit pas trop excédentaire.In one example, the precision of the regulation is 3 rpm, that is to say that a difference between the actual rotation speed and the set speed is only detected if it exceeds 3 rpm . In order for the error signal to have a sufficient value, it is also possible to choose an engine power which is not excessively excessive.

Dans une réalisation, la vitesse est mesurée à l'aide d'une génératrice tachymétrique entrainée par le moteur et le signal analogique fourni par cette génératrice est appliqué à l'entrée d'un microprocesseur dans lequel, après conversion sous forme numérique, il est comparé à des signaux numériques de consigne de vitesse afin d'effectuer la régulation. Le microprocesseur est également tel que si l'écart dépasse une valeur déterminére au démarrage d'une phase d'essorage, un ordre de diminution de vitesse est produit pour arrêter la rotation ou diminuer la vitesse de façon à supprimer le balourd.In one embodiment, the speed is measured using a tachometric generator driven by the motor and the analog signal supplied by this generator is applied to the input of a microprocessor in which, after conversion into digital form, it is compared to digital speed setpoint signals to regulate. The microprocessor is also such that if the difference exceeds a determined value at the start of a spin phase, a speed decrease command is produced to stop the rotation or decrease the speed so as to remove the unbalance.

D'autres caractéristiques et avantages de l'invention apparaîtront avec la description de certains de ses modes de réalisation, celle-ci étant effectuée en se référant aux dessins ci-annexés sur lesquels:

  • - la figure 1 est un schéma montrant un moteur d'entrainement de tambour de machine à laver et son circuit de commande selon l'invention,
  • - la figure 2 est un diagramme montrant la variation du courant d'alimentation en fonction du temps, et
  • - la figure 3 est un organigramme montrant la programmation d'un microprocesseur du circuit de la figure 1.
Other characteristics and advantages of the invention will appear with the description of some of its embodiments, this being carried out with reference to the attached drawings in which:
  • FIG. 1 is a diagram showing a washing machine drum drive motor and its control circuit according to the invention,
  • FIG. 2 is a diagram showing the variation of the supply current as a function of time, and
  • - Figure 3 is a flowchart showing the programming of a microprocessor of the circuit of Figure 1.

Dans l'exemplè la machine à laver le linge comprend un moteur électrique 10 alimenté en courant alternatif par l'intermédiaire d'une alimentation à découpage comprenant, de façon en soi connue, un interrupteur commandé 11 tel qu'un triac et un circuit de commande de cet interrupteur. En variante le moteur est alimenté en courant continu.In the example the washing machine comprises an electric motor 10 supplied with alternating current by means of a switching power supply comprising, in a manner known per se, a controlled switch 11 such as a triac and a circuit for control of this switch. As a variant, the motor is supplied with direct current.

La vitesse de rotation du moteur 10 d'entraine- ment du tambour de la machine est fonction de la puissance reçue par ce moteur c'est-à-dire de la durée de fermeture de l'interrupteur 11 au cours d'une période donnée. Cette période donnée est par exemple une alternance ou une demie-alternance du courant alternativ.The speed of rotation of the motor 10 for driving the drum of the machine is a function of the power received by this motor, that is to say of the duration of closure of the switch 11 during a given period. . This given period is for example an alternation or a half-alternation of the alternating current.

Dans l'exemple l'interrupteur 11 étant un triac, il est tel que dès qu'il a reçu une impulsion de commande de conduction sur sa gâchette 13, il reste conducteur jusqu'à ce que le courant le traversant passe par la valeur zéro. La durée de fermeture de l'interrupteur 11 ne dépend alors que de l'instant de sa fermeture au cours d'une demie-période du courant alternatif. Cet instant est couramment exprimé en angle de déphasage 0 par rapport au début de l'alternance, la fin de la demie-alternance correspondant à 180° (figure 2).In the example the switch 11 being a triac, it is such that as soon as it has received a conduction command pulse on its trigger 13, it remains conductive until the current passing through it passes through the value zero . The duration of closure of the switch 11 then depends only on the instant of its closure during a half-period of the alternating current. This instant is commonly expressed as a phase shift angle 0 relative to the start of the alternation, the end of half-cycle corresponding to 180 ° (Figure 2).

Les impulsions de commande du triac 11 sont délivrées par un circuit d'interface 12 recevant ses signaux d'entrée de la sortie 14 d'un micro- prosseur 15 dans lequel ont été introduites toutes les instructions de programmation de la machine.The control pulses of the triac 11 are delivered by an interface circuit 12 receiving its input signals from the output 14 of a micro-processor 15 into which all the programming instructions of the machine have been introduced.

Ce microprocesseur 15 présente une entrée 16 recevant le signal analogique fourni par une génératrice tachymétrique 17 entrainée par l'arbre du moteur 10.This microprocessor 15 has an input 16 receiving the analog signal supplied by a tachometer generator 17 driven by the motor shaft 10.

Dans le microprocesseur 15 les instructions de consigne de vitesse pour le moteur 10 sont stockées sous forme numérique et sont comparées aux signaux numériques de vitesse réelle, obtenus après une conversion analogique-numérique (effectuée à l'intérieur du microprocesseur 15) des signaux fournis par la génératrice 17, afin d'asservir la vitesse du moteur 10 à la vitesse de consigne programmée.In the microprocessor 15 the speed setpoint instructions for the motor 10 are stored in digital form and are compared with the digital signals of real speed, obtained after an analog-digital conversion (carried out inside the microprocessor 15) of the signals supplied by the generator 17, in order to control the speed of the motor 10 to the programmed reference speed.

Le microprocesseur est ainsi programmé pour calculer l'ecart ε, ou signal d'erreur, entre la vitesse de consigne Vc et la vitesse réelle Vr:

Figure imgb0001
et cet écart est converti, grâce à une table introduite en mémoire du microprocesseur 15, en un angle θ permettant de fermer l'interrupteur 11 à chaque demie-alternance à un instant tel que le signal d'erreur est minimisé, la vitesse réelle étant ainsi rapprochée au maximum de la vitesse de consigne.The microprocessor is thus programmed to calculate the difference ε, or error signal, between the set speed V c and the actual speed V r :
Figure imgb0001
 and this difference is converted, thanks to a table introduced into the memory of the microprocessor 15, into an angle θ making it possible to close the switch 11 at each half-wave at an instant such that the error signal is minimized, the real speed being thus brought as close as possible to the set speed.

Cependant, comme déjà mentionné ci-dessus, la précision de la régulation est volontairement limitée. Dans l'exemple chaque signal de vitesse est exprimé par un nombre binaire, ou mot, de 8 bits. La vitesse est ainsi mesurée à l'aide de 256 éléments. Le tambour pouvant tourner à 750 tours/mn un incrément de vitesse correspond à 3 tours/mn. Autrement dit la précision de la régulation est de 3 tours/mn.However, as already mentioned above, the precision of the regulation is deliberately limited. In the example each speed signal is expressed by a binary number, or word, of 8 bits. The speed is thus measured using 256 elements. Since the drum can rotate at 750 rpm, a speed increment corresponds to 3 rpm. In other words, the precision of the regulation is 3 revolutions / min.

Le signal d'erreur e calculé dans le microprocesseur 15 est également utilisé pour détecter les balourds lors de l'accélération de la rotation du moteur. Si, lors de cette accélération, le signal d'erreur ε dépasse une valeur limite εM le moteur est ralenti et il est commandé pour effectuer une opération de défoulage et ensuite reprendre son accélération. Si un balourd est à nouveau détecté une opération de défoulage est de nouveau commandée. Cependant le moteur est complètement arrêté par trois tentatives infructueuses c'est-à-dire après trois essais ayant montré que le signal d'erreur dépasse la valeur limite sM. En effet l'expérience a montré qu'après trois opérations de défoulage la probabilité pour que le linge soit réparti de façon irrégulière, et provoque ainsi des balourds, est pratiquement négligeable. En d'autres termes si au bout de trois tentatives on détecte encore des balourds il est alors hautement probable que ceux-ci ne proviennent pas d'une mauvaise répartition du linge, mais d'une autre cause à laquelle il faut remédier. C'est pourquoi on provoque alors l'ar- rét du moteur et, de préférence, également l'arrêt des autres organes de la machine.The error signal e calculated in the microprocessor 15 is also used to detect unbalances during the acceleration of the rotation of the motor. If, during this acceleration, the error signal ε exceeds a limit value εM the engine is slowed down and it is commanded to carry out a release operation and then resume its acceleration. If an unbalance is again detected, a release operation is again ordered. However, the engine is completely stopped by three unsuccessful attempts, that is to say after three tests having shown that the error signal exceeds the limit value s M. In fact, experience has shown that after three stripping operations, the probability that the laundry is distributed irregularly, and thus causes unbalances, is practically negligible. In other words if after three attempts we still detect imbalances it is then highly likely that these do not come from a poor distribution of the laundry, but from another cause which must be remedied. This is why the engine is stopped and, preferably, the other parts of the machine are also stopped.

Les divers éléments de l'asservissement étant tels que le signal d'erreur n'est pas trop faible, le balourd est toujours détectable dans de bonnes conditions. En effet si la qualité de la régulation est trop grande, même en cas balourd, le signal d'erreur peut être très faible. Au contraire en choissant une qualité de régulation qui n'est pas trop importante, le signal d'erreur ε gardera une valeur mesurable, aisément exploitable pour la détection de balourds.The various elements of the servo being such that the error signal is not too weak, the unbalance is always detectable under good conditions. In fact, if the quality of the regulation is too high, even in the event of an imbalance, the error signal can be very weak. On the contrary by choosing a regulation quality which is not too important, the error signal ε will keep a measurable value, easily exploitable for the detection of unbalances.

La figure 3 est un organigramme simplifié montrant une partie de la programmation du microprocesseur 15. Sur cet organigramme, de façon classique, les losanges correspondent à des comparaisons et les rectangles à des opérations effectuées. Cet organigramme faisant partie intégrante de la présente description, il n'est pas nécessaire de le décrire en détail. On précise cependant que l'operation correspondant au losange 20 »montée en vitesse« consiste à déterminer si, d'une part, la vitesse du moteur augmente et, d'autre part, si cette vitesse est comprise entre 50 tours/mn (vitesse qui correspond au lavage) et 150 tours/mn. Ce n'est qu'en cas de réponse positive à cette question qu'est effectuée la comparaison entre le signal d'erreur ε et la valeur limite εM (losange 21 ). Dans l'exemple εM est de l'ordre de 30 tours/mn.FIG. 3 is a simplified flowchart showing part of the programming of the microprocessor 15. On this flowchart, in a conventional manner, the diamonds correspond to comparisons and the rectangles to operations carried out. This flowchart being an integral part of the present description, it is not necessary to describe it in detail. However, it is specified that the operation corresponding to the diamond 20 "speed increase" consists in determining if, on the one hand, the speed of the motor increases and, on the other hand, if this speed is between 50 revolutions / min (speed which corresponds to washing) and 150 rpm. It is only in the event of a positive answer to this question that the comparison is made between the error signal ε and the limit value εM (diamond 21). In the example εM is of the order of 30 revolutions / min.

Claims (11)

1. Washing machine, comprising a control system controlling the speed of the drum drive motor (10) to a set value supplied by a programmable switching circuit, and comprising means for detecting out-of-balance conditions in the drum, characterized in that the out-of-balance conditions are detected by the error signal of said control system, i. e., by the difference (e) between the actual rotational speed (Vr) of the drum and the set speed (Vc) thereof.
2. Machine as claimed in claim 1, characterized in that the accuracy of the control system is limited so that the error signal has a measurable value.
3. Machine as claimed in claim 2, characterized in that the accuracy of measurement of the speed of revolution is in the order of 3 r. p. m.
4. Machine as claimed in any of the claims 1 to 3, characterized in that it comprises means for decelerating the drum when the error signal (ε) exceeds a limit value (EM).
5. Machine as claimed in claim 4, characterized in that said limit value (εM) is in the order of 30 r. p. m.
6. Machine as claimed in claim 4 or claim 5, characterized in that the drum will be decelerated only when the speed of revolution is higher than that which corresponds to a washing phase.
7. Machine as claimed in any of the claim 4 to 6, characterized in that a separating operation is actuated when the error signal (e) exceeds said limit value (εM), and that subsequently the motor is accelerated again.
8. Machine as claimed in claim 7, characterized in that after three separating operations, following which unacceptable out-of-balance conditions were detected, the motor is finally stopped.
9. Machine as claimed in any of the preceding claims, characterized in that it comprises a microprocessor (15) for the control system and for detecting the out-of-balance conditions.
10. Machine as claimed in any of the preceding claims, characterized in that it comprises a tachogenerator (17) for measuring the actual speed of revolution of the drum.
11. Machine as claimed in any of the preceding claims, characterized in that the drum drive motor (10) is supplied by a phase-control means (11) actuated by said control system.
EP83400575A 1982-03-26 1983-03-18 Clothes washing machine with means for detecting vibrations due to unbalance Expired - Lifetime EP0091336B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8205256A FR2524020A1 (en) 1982-03-26 1982-03-26 WASHING MACHINE WITH MEANS FOR DETECTION OF BALANCES
FR8205256 1982-03-26

Publications (3)

Publication Number Publication Date
EP0091336A1 EP0091336A1 (en) 1983-10-12
EP0091336B1 true EP0091336B1 (en) 1985-09-11
EP0091336B2 EP0091336B2 (en) 1992-11-19

Family

ID=9272464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400575A Expired - Lifetime EP0091336B2 (en) 1982-03-26 1983-03-18 Clothes washing machine with means for detecting vibrations due to unbalance

Country Status (4)

Country Link
EP (1) EP0091336B2 (en)
DE (1) DE3360760D1 (en)
ES (1) ES8402039A1 (en)
FR (1) FR2524020A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577949B1 (en) * 1985-02-28 1988-02-12 Esswein Sa WASHING AND SPINNING MACHINE WITH VARIABLE SPINNING TIME
FR2587378B1 (en) * 1985-09-17 1987-11-20 Esswein Sa METHOD FOR DETECTING THE LEVEL OF WATER IN A WASHING MACHINE AND WASHING MACHINE USING THE SAME
FR2629484B1 (en) * 1988-03-29 1990-11-16 Esswein Sa IMPROVEMENT IN MEANS FOR DETECTING BALMS IN WASHING MACHINES
FR2665271B1 (en) * 1990-07-24 1992-11-13 Sextant Avionique METHOD FOR CONTROLLING THE ROTATION SPEED OF THE DRUM OF A CENTRIFUGAL SPINNING MACHINE ACCORDING TO THE BALOURD AND MACHINE FOR CARRYING OUT THIS METHOD.
DE19549526C2 (en) * 1995-06-23 1999-02-11 Miele & Cie Appts. for determining imbalance of washing machine drum
DE19842611C2 (en) * 1997-12-10 2000-11-16 Miele & Cie Washer or washer dryer
GB0006502D0 (en) 2000-03-18 2000-05-10 Notetry Ltd Laundry appliance
DE10110854C5 (en) * 2000-04-07 2010-03-04 Miele & Cie. Kg Device for determining the imbalance in a drum washing machine
DE102004021627B3 (en) * 2004-05-03 2005-08-18 Koenig & Bauer Ag Roller support for supporting supply roller with axle for rotation printing machine has regulator that regulates imbalance force to desired value by driving final control element(s) to vary roller revolution rate
FR2898262B1 (en) * 2006-03-13 2012-11-02 Seb Sa CULINARY PREPARATION APPARATUS EQUIPPED WITH MEANS FOR DETECTION OF THE UNBALANCE

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152462A (en) * 1961-12-13 1964-10-13 Gen Motors Corp Clothes washing machine and control means therefor
US3674419A (en) * 1970-11-25 1972-07-04 Whirlpool Co Spin control for a washer-dryer
IT1038355B (en) * 1975-05-22 1979-11-20 Ire Spa PROCEDURE AND AUTOMATIC MACHINE FOR WASHING AND SPINNING THE LINEN
DE2915815A1 (en) * 1979-04-19 1980-11-06 Bauknecht Gmbh G DEVICE FOR DETECTING THE SPEED AND THE BALANCE OF AN AGGREGATE IN A HOUSING VIBRATINGLY
FR2489384A1 (en) * 1980-09-02 1982-03-05 Esswein Sa Automatic device to counteract imbalance in centrifuge loading - by temporary interruption of power supply permitting load redistribution
DE3039315C2 (en) * 1980-10-17 1984-10-31 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Circuit arrangement for supplying power to a variable-speed electric motor
FR2496136A1 (en) * 1980-12-17 1982-06-18 Amiens Const Electromeca Monitor to prevent uneven loading of rotary drum washing machines - to prevent overstressing during high speed spins
DE3101511A1 (en) * 1981-01-19 1982-08-26 Siemens AG, 1000 Berlin und 8000 München METHOD AND ARRANGEMENT FOR DETERMINING THE LOAD OF DEVICES DRIVEN BY AN ELECTRIC MOTOR

Also Published As

Publication number Publication date
FR2524020B1 (en) 1985-01-04
EP0091336B2 (en) 1992-11-19
ES520989A0 (en) 1984-01-01
FR2524020A1 (en) 1983-09-30
ES8402039A1 (en) 1984-01-01
DE3360760D1 (en) 1985-10-17
EP0091336A1 (en) 1983-10-12

Similar Documents

Publication Publication Date Title
EP0091336B1 (en) Clothes washing machine with means for detecting vibrations due to unbalance
EP0345120B1 (en) Washing machine or dryer with means for automatically determining the weight of the laundry
FR2537460A1 (en) METHOD FOR THE COMPENSATION OF BALANCES IN THE SETTING OF CENTRIFUGAL DEVICES AND ITS APPLICATION
FR2608273A1 (en) METHOD FOR DETERMINING THE ROTATION ANGLE OF A ROTATING BODY
CA2196252A1 (en) Process and device for common regulation of electric motors driving wheels of a vehicle
FR2492608A1 (en) POWER SUPPLY CIRCUIT OF AN ELECTRIC MOTOR WITH ADJUSTABLE ROTATION SPEED
FR2498949A1 (en) SCREW CENTRIFUGE
EP0433157B1 (en) Method of stopping a washing machine drum with the door of the drum aligned with the washing machine door, and washing machine implementing such a method
EP0410827B1 (en) Washing machine or dryer with means for automatically determining the weight of the laundry
EP0575911B1 (en) Speed control device of an electric motor and method of operation
FR2697332A3 (en) Method for determining the unbalance of a drum of a loaded washing machine.
EP0549467B1 (en) Stop control system for a laundry dryer
FR2655065A1 (en) Washing machine with top-loading drum, with stoppage in the loading/unloading position
EP0335790B1 (en) Balance detection means in the washing machines
EP0468862B1 (en) Control method of the rotational speed of the drum of a centrifuging machine as function of imbalance and machine for the use of this method
EP0225813B1 (en) Driving motor control device for a washer drum
EP0767367B1 (en) Procedure and apparatus for balancing a rotating body by adding balancing masses
FR2517139A1 (en) METHOD AND DEVICE FOR ADJUSTING THE ROTATION SPEED OF AN ELECTRIC TOOL WITH A UNIVERSAL MOTOR
EP0754797B1 (en) Method and device for ascertaining the stop position of a toploading washing machine drum
EP0219387B1 (en) Method for controlling the liquid level in a tub of a washing machine, and washing machine carrying out the method
FR2699761A1 (en) Method and device for retrograding a motor with variable number of poles
FR2787125A1 (en) LAUNDRY WASHING METHOD AND WASHING MACHINE USING THE SAME
FR2573101A1 (en) Process for the automatic regulation of the working parameters of a napping machine and napping machine automated by means of this process
EP0564378B1 (en) Low speed regulation method for a motor
FR2631988A1 (en) Improvements to a washing machine or dryer having automatic determination of the washing load introduced into the machine

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

Designated state(s): CH DE GB IT LI NL SE

17P Request for examination filed

Effective date: 19831015

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): CH DE GB IT LI NL SE

REF Corresponds to:

Ref document number: 3360760

Country of ref document: DE

Date of ref document: 19851017

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Free format text: ESSWEIN S.A.

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: BOSCH-SIEMENS HAUSGERAETE GMBH, STUTTGART

Effective date: 19860610

Opponent name: MIELE & CIE. GMBH & CO

Effective date: 19860610

NLR1 Nl: opposition has been filed with the epo

Opponent name: BOSCH-SIEMENS HAUSGERAETE GMBH

Opponent name: MIELE & CIE. GMBH & CO.

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

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

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19921119

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): CH DE GB IT LI NL SE

ITF It: translation for a ep patent filed
NLR2 Nl: decision of opposition
NLR3 Nl: receipt of modified translations in the netherlands language after an opposition procedure
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930218

Year of fee payment: 11

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930331

Year of fee payment: 11

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

Ref country code: LI

Effective date: 19940331

Ref country code: CH

Effective date: 19940331

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

Ref country code: NL

Effective date: 19941001

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EAL Se: european patent in force in sweden

Ref document number: 83400575.3

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

Ref country code: GB

Payment date: 19960219

Year of fee payment: 14

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

Ref country code: SE

Payment date: 19960223

Year of fee payment: 14

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

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

Ref country code: GB

Effective date: 19970318

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

Ref country code: SE

Effective date: 19970319

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

Effective date: 19970318

EUG Se: european patent has lapsed

Ref document number: 83400575.3

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

Ref country code: DE

Payment date: 20010529

Year of fee payment: 19

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

Ref country code: DE

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

Effective date: 20021001

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO