EP0808935B1 - Machine à laver avec dispositif de verrouillage de porte à action instantanée - Google Patents

Machine à laver avec dispositif de verrouillage de porte à action instantanée Download PDF

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Publication number
EP0808935B1
EP0808935B1 EP97106498A EP97106498A EP0808935B1 EP 0808935 B1 EP0808935 B1 EP 0808935B1 EP 97106498 A EP97106498 A EP 97106498A EP 97106498 A EP97106498 A EP 97106498A EP 0808935 B1 EP0808935 B1 EP 0808935B1
Authority
EP
European Patent Office
Prior art keywords
door
moving element
washing machine
machine
electric
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
EP97106498A
Other languages
German (de)
English (en)
Other versions
EP0808935A3 (fr
EP0808935A2 (fr
Inventor
Giuseppe Frucco
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 EP0808935A2 publication Critical patent/EP0808935A2/fr
Publication of EP0808935A3 publication Critical patent/EP0808935A3/fr
Application granted granted Critical
Publication of EP0808935B1 publication Critical patent/EP0808935B1/fr
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
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door

Definitions

  • the present invention generally refers machines for washing clothes, in particular clothes washing machines of the front-loading type, provided with an improved type of safety door interlock arrangement.
  • Household-type washing machines are known in the art which are provided with door interlock arrangements of various type and with different characteristics. According to their mode of operation, all such arrangements can be grouped into following homogeneous categories:
  • This type of door interlock arrangement protects the user against his or her being able to gain access to machine parts which are moving at any hazardous speed (such as the drum rotating at spin-extraction speed) and, furthermore, during the entire washing cycle in the case of failures which are likely to occur in clothes washing machines provided with electronically controlled drive motors.
  • the second drawback occurs when the main on-off switch of the machine is turned on while the loading door of the machine is open. In fact, under such circumstances the washing machine would start immediately upon closing the door, thereby activating the cycle phase that is set at that moment on the programme selector switch and at the same time locking the door in its closed condition. It will be appreciated that such an operation may not be done intentionally, ie. may occur accidentally, and may therefore give rise to hazardous situations involving serious accidents to children or animals that may have accidentally crept into the drum of the washing machine when its loading door was open and its drum at a standstill.
  • Such a type of door interlock arrangement is only effective in protecting the user against accidents that may occur when opening the door of an operating washing machine during spin-extraction phases (since no actual danger practically exists in the other phases of the washing cycle) and has further the advantage of enabling the loading door of the machine to be immediately opened in all other phases of the same washing cycle. It however has a major drawback in that it is not effective in preventing accidents of the type described above in connection with the second major drawback of the door interlock arrangement described under 1) above from occurring.
  • Such a door interlock arrangtement has a third major drawback in that, should the coil of the same door interlock arrangement happen to become energized accidentally, eg. due to a short-circuit condition of the Triac, the washing machine remains electrically energized as well, so that it is still enabled to carry out all the various operations and working steps provided for by the washing cycle that is being performed (including therefore also those steps and phases involving hazardous operating conditions), while the door can in fact be opened all the time.
  • the European patent specification no. -0 384 148 to the same Applicant discloses a door interlock arrangement for clothes washing or clothes drying machines which comprises an electromechanical actuator associated to a latch or bolt interacting with the lock of the loading door, so as top lock and unlock the same loading door, said door interlock arrangement further comprising an electrical contact connected in the electric circuit of the electromechanical actuator and adapted to energize and de-energize the same actuator.
  • said locking means is operatively limited by being not actuated by an appropriate current control device (5) according to the output of an electronic control and command device (10) which detects and processes the information coming from a plurality of sensors on the main functioning devices of the washing machine.
  • a door locking means which provides a main sliding element and a secondary sliding element.
  • said door locking means does show the drawback that, should the coil of the same locking means happen to become energised accidentally, e.g. due to a short circuit condition in the current controlling device, the machine remains electrically energised as well, and it may result in hazardous operating conditions.
  • Such a door interlock arrangement shall furthermore be constructed so as to be able to prevent, after the machine has been switched on, but before the door is closed, the electric loads thereof from being energized, thereby preventing them from being started or actuated and, therefore, eliminating another of the afore cited drawbacks.
  • Safety conditions as provided for by the applying standard regulations must furthermore be ensured, according to which a single command pulse that may be transmitted to the electrically operated door-release device shall not be sufficient to cause it to actually release the door.
  • a construction shall also be provided so that a possible interruption of the power supply to the electromagnet, ie. a de-energization thereof, owing to some failure whatsoever (eg. a short-circuit condition in a Triac) is not capable of affecting the overall safety of the machine in any way.
  • Said door interlock arrangement shall further be of simple, inexpensive construction, shall be capable of operating reliably, and shall make use of readily available, normally used techniques.
  • the solution according to the invention basically consists in making use of and combining the:
  • the door interlock arrangement 1 which is normally positioned in the machine on the inner surface of the frame defining the clothes loading opening of the machine that is closed by the door, comprises an electric actuator 2, which is typically an electromagnet, but may be formed as well by any other device offering equivalent performance profiles in terms of instantaneous or almost instantaneous operation capabilities, said actuator being energized through a first conductor 3 that is connected to the power supply, and a second conductor 4 that is connected to a current control device 5, typically a Triac.
  • an electric actuator 2 which is typically an electromagnet, but may be formed as well by any other device offering equivalent performance profiles in terms of instantaneous or almost instantaneous operation capabilities, said actuator being energized through a first conductor 3 that is connected to the power supply, and a second conductor 4 that is connected to a current control device 5, typically a Triac.
  • Such a door interlock arrangement is adapted to be energized by electric pulses, wherein at each pulse a moving element 6 extends from the door interlock arrangement, said moving element being adapted to extend to progressively more or less protruding positions in accordance with the number and the polarity of the pulses received, as well as to retract to a withdrawal position in which said moving element is fully disengaged from the rest of the machine.
  • Said extended positions are at least in the number of two.
  • an appropriate catch means 11 adapted to engage said moving element when the latter extends to its first or second extracted position, thereby preventing the door from being opened, whereas in the retracted position of said moving element said catch means is disengaged, thereby enabling the door to be opened.
  • a switch 7 Connected to and actuated by said moving element there is provided a switch 7 which is closed when the moving element is in its first or its second extracted position, and is on the contrary opened when the moving element moves back to its retracted position.
  • a terminal 8 of said switch connects to the power supply, while the other terminal 9 thereof is connected to a control and command device 10, to which also said current control device 5 is connected along, via further connections 13, also other operational and sensing devices of the machine.
  • a plurality of signals that may possibly be present at said connections 13 relating to operating conditions that have been previously defined as "non hazardous” and are therefore compatible with an immediate or instantaneous opening of the door, are stored in the control and command device 10.
  • Said control device is then constructed so as to enable following operational sequences and modes:
  • the signals that are present at the connections 13 inform the control device 10 on the conditions of the machine and are automatically and periodically compared with the previously stored conditions referring to non-hazardous operating conditions and modes. When such a comparison gives an identity of conditions as an outcome, this means that the machine is operating in a manner that has been previously defined as "non-hazardous".
  • control device 10 sends a signal to the current control device 5 so as to enable it to transmit appropriate pulses to the electromagnet 2 to cause the moving element 6 to retract into the electromagnet, thereby enabling the door to be immediately opened, without any further delays and resulting waste of time.
  • the expedient is advantageously adopted according to which said control device 10 is arranged so as to send at least two distinct signals to the current control device 5, so that the moving element will be caused to retract and the door will be able to be opened only with two distinct current commands , since a single current command acting in the direction of a retraction of the moving element into the first extraction position thereof is not yet sufficient to enable the door to be opened, considering that in said first extraction position of said moving element, the latter is still engaging the afore cited catch means 11.
  • control device 10 is adapted to send appropriate signals to the current control device 5 so that the latter is caused to transmit at least a pulse to said actuator so as to cause the moving element to extend into its respective extraction position, thereby preventing the door from being opened in the presence of hazardous operating conditions, ie. in the presence of all those conditions that have not previously been defined as "non hazardous".
  • the terminal 9 of the switch 7 sends an appropriate electric signal to the control device 10, which is capable of verifying the congruity between the door locking command transmitted and the confirmation that the door has been actually locked.
  • a first such improvement can be noticed to consist in arranging between a plurality of loads 20 and the related power-supply line 21 an appropriate switch 22 of the normally open type, which is adapted to be closed by the action of the prong 23 of the door when the latter is shut.
  • the pole of said switch 22 opposite to the live pole thereof is connected via the connection 25 to said control device 10.
  • the second improvement can be noticed to essentially consist in the provision of a indicating device 27 arranged through an appropriate connection 26 between said connection 9 (connecting the switch 7 to the device 10) and the other pole of the power supply with respect to the power supply to the connection 8.
  • such an indicating device When so connected, such an indicating device enables the user of the machine to immediately make out whether said door interlock arrangement is locking due to the position of the moving element 6 thereof and, therefore, to know whether in that very moment it is possible for the door to be opened or not.
  • said indicating device 27 which shall preferably be of the illuminating type, inform that the loading door is locked, the user will immediately conform to the situation and, in particular, will therefore avoid tampering in an effort to force the loading door open, as well as running into hazardous situations.

Landscapes

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

Claims (7)

  1. Machine à laver des vêtements comportant une cuve de lavage recevant un tambour, ayant une ouverture agencée pour donner accès à l'intérieur dudit tambour et une porte agencée pour fermer ladite ouverture, un agencement de verrouillage de porte (1) qui comporte des moyens électroniques de contrôle et de commande (10), un actionneur électrique (2) muni d'un élément mobile (6), -un commutateur (7) actionné par ledit élément mobile, et qui est fermé lorsque l'élément mobile est dans l'une quelconque des positions extraites et est ouvert lorsque l'élément mobile est dans les positions rétractées dans ledit actionneur électrique (2) conformément aux commandes imposées à ce dernier, caractérisée en ce que ledit actionneur électrique est mis sous tension par l'intermédiaire d'un premier conducteur qui est relié à l'alimentation en courant et par l'intermédiaire d'un second conducteur qui est relié à un dispositif de commande de courant approprié (5), ledit dispositif étant adapté pour être commandé par ledit dispositif de contrôle et de commande (10),
    ledit actionneur est actionné par des signaux électriques appropriés, dans lequel l'élément mobile (6) est adapté pour s'étendre dans deux positions extraites successives distinctes, ainsi que pour se déplacer en retour vers une position rétractée, conformément au nombre et à la polarité des signaux reçus par ledit dispositif de commande de courant (5),
    lorsque la porte est fermée et que ledit élément mobile (6) est par la suite amené à s'étendre vers l'une quelconque des positions extraites mentionnées ci-dessus, ce même élément mobile vient en prise avec des moyens formant verrou appropriés (11) agencés sur la machine de manière à empêcher de manière positive que la porte ne soit ouverte.
  2. Machine à laver des vêtements selon la revendication 1, caractérisée en ce que lorsque la porte est fermée et que ledit élément mobile est par la suite amené à se déplacer en retour vers sa position rétractée dans ledit électroaimant, ce même élément mobile se libère desdits moyens formant verrou agencé sur la porte de la machine, de sorte que cette même porte peut être ouverte.
  3. Machine à laver des vêtements selon la revendication 1 ou 2, caractérisée en ce que lors de l'existence de conditions de fonctionnement prédéfinies dans la machine, lesdits moyens électroniques de contrôle et de commande (10) agissent sur ledit dispositif de commande de courant (5) pour l'amener à produire au moins une impulsion électrique qui est transmise audit actionneur pour amener ledit élément mobile à venir en prise avec lesdits moyens formant verrou.
  4. Machine à laver des vêtements selon la revendication 3, caractérisée en ce que lorsque lesdites conditions de fonctionnement prédéfinies de la machine cessent, lesdits moyens électroniques de contrôle et de commande agissent sur ledit dispositif de commande de courant (5) de manière à l'amener à produire deux impulsions électriques qui sont transmises audit actionneur pour amener ledit élément mobile à se libérer entièrement desdits moyens formant verrou.
  5. Machine à laver des vêtements selon la revendication 3 ou 4, caractérisée en ce qu'elle comporte un dispositif d'indication de mise sous tension électrique (27) qui est relié par une borne de celui-ci à une source d'alimentation en courant (8) par l'intermédiaire d'un commutateur électrique (7) qui est adapté pour être fermé par ledit élément mobile (6) lorsque ce dernier est étendu pour venir en prise avec lesdits moyens formant verrou (11).
  6. Machine à laver des vêtements selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle est munie d'un commutateur (27) agencé de manière à connecter automatiquement et de manière correspondante une pluralité de charges et/ou de fonctions électriques (20) de ladite machine à l'alimentation en courant lorsque ladite porte est fermée.
  7. Machine à laver des vêtements selon l'une quelconque des revendications précédentes, caractérisée en ce que, lorsque ladite porte est fermée, un signal électrique est automatiquement envoyé par l'intermédiaire de moyens appropriés de commutation et de connexion (22, 23, 25) auxdits moyens de contrôle et de commande (10) qui permettent par conséquent à la machine d'effectuer ses programmes de fonctionnement.
EP97106498A 1996-05-22 1997-04-19 Machine à laver avec dispositif de verrouillage de porte à action instantanée Expired - Lifetime EP0808935B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96PN000030A IT1289378B1 (it) 1996-05-22 1996-05-22 Lavabiancheria con bloccoporta istantaneo
ITPN960030 1996-05-22

Publications (3)

Publication Number Publication Date
EP0808935A2 EP0808935A2 (fr) 1997-11-26
EP0808935A3 EP0808935A3 (fr) 1998-08-05
EP0808935B1 true EP0808935B1 (fr) 2002-06-19

Family

ID=11395143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97106498A Expired - Lifetime EP0808935B1 (fr) 1996-05-22 1997-04-19 Machine à laver avec dispositif de verrouillage de porte à action instantanée

Country Status (4)

Country Link
EP (1) EP0808935B1 (fr)
DE (1) DE69713455T2 (fr)
ES (1) ES2178728T3 (fr)
IT (1) IT1289378B1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1039012A1 (fr) * 1999-03-22 2000-09-27 Siber B.V. Système de verrouillage de sécurité d'une porte, en particulier pour les machines à laver avec un système électronique incorporé
CN101688355B (zh) * 2007-06-26 2012-05-23 阿塞里克股份有限公司 洗涤机/干燥机
DE102007058380A1 (de) * 2007-12-05 2009-06-10 BSH Bosch und Siemens Hausgeräte GmbH Schaltungsanordnung zum Betreiben eines Hausgeräts
IT1392337B1 (it) 2008-12-19 2012-02-28 Indesit Co Spa Macchina per lavare e/o asciugare biancheria con blocco porta
DE102014209113A1 (de) 2014-05-14 2015-11-19 BSH Hausgeräte GmbH Verriegelungseinrichtung zum Verriegeln einer Tür eines Haushaltsgeräts, Haushaltsgerät und entsprechendes Verfahren
KR102471484B1 (ko) * 2015-08-17 2022-11-28 삼성전자주식회사 세탁기 및 그 제어방법
CN112481926B (zh) * 2019-08-20 2022-06-21 青岛海尔洗衣机有限公司 一种洗涤设备及洗涤设备滚筒解锁的判定方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1234684B (it) * 1989-01-30 1992-05-26 Zanussi A Spa Industrie Dispositivo di bloccaggio dello sportello per macchine lavabiancheria e/o asciugabiancheria
IT1234686B (it) * 1989-02-21 1992-05-26 Zanussi A Spa Industrie Dispositivo di bloccaggio dello sportello per macchine lavabiancheria o asciugabiancheria.
DE4034853C2 (de) * 1990-11-02 1998-08-06 Ltd Locking Technologies And D Magnetverschluß
IT1259224B (it) * 1992-09-17 1996-03-11 Zanussi Elettrodomestici Lavabiancheria con bloccoporta perfezionato

Also Published As

Publication number Publication date
EP0808935A3 (fr) 1998-08-05
ITPN960030A1 (it) 1997-11-22
EP0808935A2 (fr) 1997-11-26
DE69713455D1 (de) 2002-07-25
DE69713455T2 (de) 2003-02-20
IT1289378B1 (it) 1998-10-02
ES2178728T3 (es) 2003-01-01
ITPN960030A0 (it) 1996-05-22

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