EP1928290B1 - Machine à laver avec dispositif de prévention de trop-plein - Google Patents

Machine à laver avec dispositif de prévention de trop-plein Download PDF

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Publication number
EP1928290B1
EP1928290B1 EP07734785A EP07734785A EP1928290B1 EP 1928290 B1 EP1928290 B1 EP 1928290B1 EP 07734785 A EP07734785 A EP 07734785A EP 07734785 A EP07734785 A EP 07734785A EP 1928290 B1 EP1928290 B1 EP 1928290B1
Authority
EP
European Patent Office
Prior art keywords
switch
configuration
contact
conductor
washer according
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.)
Active
Application number
EP07734785A
Other languages
German (de)
English (en)
Other versions
EP1928290A1 (fr
Inventor
Savio La Bella
Costantino Mariotti
Giovanni Bombardieri
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co 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 Indesit Co SpA filed Critical Indesit Co SpA
Priority to PL07734785T priority Critical patent/PL1928290T3/pl
Publication of EP1928290A1 publication Critical patent/EP1928290A1/fr
Application granted granted Critical
Publication of EP1928290B1 publication Critical patent/EP1928290B1/fr
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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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/421—Safety arrangements for preventing water damage

Definitions

  • the present invention relates to a washer comprising an overflow prevention safety device which prevents unwanted water overflows.
  • Washers comprise electrical appliances for washing, for example:
  • washers called “washing machines” are suitable for carrying out at least a washing treatment on textile articles made of any fibre or in any colour and may be machines called “textile articles washers” or machines called “textile articles washer - driers”, if in addition to washing they also carry out at least a treatment for drying textile articles.
  • Textile articles can be loaded in a washing machine at the front, through an opening made in the front wall of the machine, or from the top, through an opening made in the upper wall of the machine.
  • Such washers comprise a washing tank in which the user places the articles to be washed.
  • the washing tank has a pipe for washing water feed and a pipe for its drainage.
  • Water feed and drainage is regulated according to the signal arriving from a pressure switch connected to the washing tank which detects the water level in the washing tank.
  • the water level in the tank is kept between a minimum value and a maximum value which allows correct operation.
  • a prior art device is disclosed in document US-A-4 069 425 .
  • Other prior art devices comprise a pressure switch comprising a switch which, depending on the water level detected in the washing tank, adopts three different configurations:
  • the overflow prevention circuit requires quite a lot of wiring. That means high costs, linked to the costs of the wiring and the costs of the labour needed for installation and maintenance. In particular the labour costs are proportional to the time required and so also the number of connections to be made which increase with increases in the amount of wiring.
  • the present invention has for an aim to overcome the above-mentioned disadvantages by providing a washer comprising a device which prevents the risks of unwanted water overflows, the device being economical and easy to install.
  • the numeral 1 denotes a washer in accordance with the present invention.
  • the washer 1 comprises an electrical appliance.
  • the washer 1 comprises a washing machine or a dishwasher.
  • the washer 1 is of the type comprising a washing tank 2 suitable for containing the water used for the washing treatment.
  • the washing tank 2 is a compartment in which there is a rotary drum into which the user puts the articles to be washed (consisting of clothes, linen, etc.).
  • the articles to be washed are put directly into the washing tank 2, the latter being a compartment which the user can access via a door and the compartment containing supports on which to put the articles to be washed.
  • the washer 1 also comprises:
  • the switch 5 adopts different configurations, each corresponding to one of the at least three predetermined water levels.
  • the switch 5 is made of a material which conducts electricity.
  • the switch 5 is also connected to one of the phases of the mains, said mains schematically illustrated in Figure 1 with the electric feeder block 9.
  • the first and second electric conductors 51, 52 transfer to the electronic control unit 4, according to a binary logic linked to whether or not an electric current passes in each electric conductor 51, 52, at least three different items of information relating to the water level in the washing tank 2. Each item of information unambiguously corresponds to one of the corresponding different configurations of the switch 5.
  • the switch 5 can move between at least three of the following possible configurations:
  • the switch 5 is preferably able to move between the first, second and third configurations.
  • the switch 5 remains in the configuration previously adopted until it receives from the water level detector 3 the signal indicating that the predetermined water level, corresponding to a different configuration, has been reached in the washing tank 2.
  • the presence of a predetermined minimum water level in the washing tank 2 is associated with a predetermined configuration amongst those the switch 5 can adopt.
  • the signalling to the electronic control unit 4 that it must enable the inflow of water into the washing tank 2.
  • Said configuration is conventionally indicated as the "empty configuration”. In a preferred but non-limiting embodiment, said configuration coincides with the first configuration.
  • the water is fed into the washing tank 2 through an inlet pipe 40 along which there is a valve 41 which, if open, allows the water to pass.
  • the presence of a predetermined maximum water level in the washing tank 2, considered compatible with normal washing, is associated with another predetermined and different configuration amongst those the switch 5 can adopt.
  • the signalling to the electronic control unit 4 that it must inhibit the inflow of any more water into the washing tank 2.
  • Said configuration is conventionally indicated as the "full configuration”. In a preferred but non-limiting embodiment, said configuration coincides with the second configuration.
  • the signalling to the electronic control unit 4 that a predetermined, excessive and anomalous water level has been reached is associated with another predetermined and different configuration amongst those the switch 5 can adopt.
  • Said configuration is conventionally indicated as the "overflow prevention configuration". In a preferred but non-limiting embodiment, said configuration coincides with the third configuration.
  • each configuration may be associated with any item of information relative to the water level in the washing tank 2, provided that there is an unambiguous and previously coded match.
  • the washer 1 comprises means 7 for draining the water from the washing tank 2.
  • the drainage means 7 may be activated by the electronic control unit 4 if the configuration signalling an excessive and anomalous water level is adopted. This prevents the water from overflowing from the washing tank 2.
  • the water drainage means 7 comprise a drainage pump 71 positioned along a drainage pipe 70 connected to the washing tank 2.
  • the switch 5 is hinged at a first point 501 and can rotate relative to the first point 501 so as to pass from one configuration to the other.
  • the switch 5 preferably consists of a small rod which develops mainly in one direction.
  • the rotation relative to the first point 501 of the switch 5 tangent measured at the first point 501 always occurs in the same direction, passing from a configuration associated with a lower water level to a configuration associated with a higher water level and vice versa. This simplifies the mechanism of the system for moving the switch 5 according to the water level detector 3 signal.
  • the first or the second conductor 51, 52 makes contact with the switch 5 at a second point 502 of the switch 5.
  • the second point 502 is at a predetermined distance, other than zero, from the first point 501.
  • the first or the second conductor 51, 52 stops the switch 5 at the second point 502 of the switch 5.
  • to stop refers to a first element able to move in a predetermined direction making contact with a second element, the second element obstructing or preventing the continuation of the motion of the first element along the original direction.
  • the switch 5 comprises a deformable zone 503 inserted between the first point 501 and the second point 502.
  • the first and second points 501, 502 remain as they were in the second configuration whilst the deformable zone 503 curves and makes contact with the first conductor 53.
  • the first conductor 51 comprises a first and a second electric contact 61, 62 designed to make contact with the switch 5, the first and second electric contacts 61, 62 being positioned at a predetermined distance from one another.
  • the first conductor 51 is split into a fork with two stretches, a first stretch 511 comprising the first contact 61 and a second stretch 512 comprising the second contact 62.
  • the first and second stretches 511, 512 are electrically connected in at least one shared point 513. Said shared point 513 is inserted between the switch 5 and the electronic control unit 4.
  • the second conductor 52 comprises a third electric contact 63 designed to make contact with the switch 5.
  • the switch 5 preferably makes contact with the first electric contact 61; in the second configuration it makes contact with the third electric contact 63 and in the third configuration it makes contact with the second and third electric contacts 62, 63.
  • the switch 5 is stopped by the first electric contact 61 and in the second configuration it is stopped by the third electric contact 63.
  • the third electric contact 63 in combination with the remaining parts of the washer 1 which allow detection of the danger situation linked to an excessive water level in the washing tank 2, constitute the overflow prevention device. They prevent the water from overflowing to the outside.
  • the washer 1 preferably comprises a pressure switch 8 in turn comprising the water level detector 3, the switch 5 and the three contacts 61, 62, 63.
  • the pressure switch 8 comprises a pressure sensor located along the drainage pipe 70 or close to the lower part of the washing tank 2.
  • the pressure switch 8 detects the pressure applied by the water present in the washing tank 2.
  • the switch 5 is calibrated so as to associate the configuration conventionally known as "empty” with a pressure corresponding to around 70 millimetres of water column, the configuration conventionally known as “full” with a pressure of 95 millimetres of water column and the configuration conventionally known as "overflow prevention" with a pressure of 330 millimetres of water column.
  • the switch 5 in general during washer 1 normal operation, the switch 5 is stopped by the first or the third contact 61, 63. If there is a fault in the water inlet system, the water level in the washing tank 2 will tend to rise, resulting in the risk of water overflows. For example, in the case of a washing machine water may overflow through the detergent drawer. When the water level in the washing tank 2 reaches a warning level, in response to a signal from the water level detector 3, the switch 5 changes from the configuration conventionally known as "full" to the configuration conventionally known as "overflow prevention".
  • the switch 5 which in the "full" configuration ( Figure 2 ) was stopped by the third contact 63 curves and makes contact with not just the third contact 63 but also the second contact 62 ( Figure 3 ).
  • the electric signal carried by the two conductors 51, 52 informs the electronic control unit 4 of the imminent danger, so that it can apply suitable countermeasures such as activating the drainage pump 71.
  • the fourth configuration could be adopted to signal that the pressure switch 8 is broken.
  • the invention brings important advantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Centrifugal Separators (AREA)
  • Detergent Compositions (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Soil Working Implements (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (23)

  1. Machine à laver comprenant:
    un réservoir de lavage (2) adapté à contenir l'eau utilisée pour le traitement de lavage;
    un capteur (3) du niveau de l'eau dans le réservoir de lavage (2);
    une unité électronique (4) de contrôle de la machine à laver (1), l'unité électronique de contrôle (4) étant électroniquement connectée à un premier et à un second conducteur électrique (51, 52);
    un commutateur (5) réalisé en un matériau conducteur d'électricité, contrôlé par le capteur (3) du niveau de l'eau, les premiers et seconds conducteurs (51, 52) étant opérationnellement associables avec le commutateur (5) par contact, le commutateur (5), en cas de contact, alimentant en courant électrique le conducteur (51, 52) correspondant; le capteur (3) du niveau d'eau envoyant au commutateur (5) un signal relatif à au moins trois niveaux d'eau prédéterminés atteints dans le réservoir de lavage (2);
    la machine à laver étant caractérisée en ce que:
    selon ledit signal le commutateur (5) adopte de différentes configurations, chacun correspondant à l'un des au moins trois niveaux d'eau prédéterminés;
    des premier et second conducteurs électriques (51, 52) transfèrent à l'unité électronique de contrôle (4), selon une logique binaire liée au fait qu'un courant électrique passe ou ne passe pas dans chacun des conducteurs électriques (51, 52), au moins trois informations différentes relatives au niveau d'eau dans le réservoir de lavage (2), chaque information correspondante correspondant sans équivoque à l'une des différentes configurations du commutateur (5).
  2. Machine à laver selon la revendication 1, caractérisée en ce que le commutateur (5) peut se déplacer entre au moins trois des configurations possibles suivantes:
    une première configurations dans laquelle le commutateur est en contact seulement avec le premier conducteur (51) des deux conducteurs électriques (51, 52), l'unité électronique de contrôle (4) détectant le passage du courant dans le premier conducteur (51) et l'absence de courant dans le second conducteur (52);
    une seconde configuration dans laquelle le commutateur est en contact seulement avec le second conducteur (52) des deux conducteurs (51, 52), l'unité électronique de contrôle (4) détectant le passage du courant dans le second conducteur (52) et l'absence de courant dans le premier conducteur (51);
    une troisième configuration dans laquelle le commutateur est en contact avec les premier et second conducteurs (51, 52), l'unité électronique de contrôle (4) détectant le passage du courant dans le premier et le second conducteur (51, 52);
    une quatrième configuration dans laquelle le commutateur n'est pas en contact ni avec le premier ni avec le second conducteur (51, 52), l'unité
    électronique de contrôle (4) détectant l'absence de courant aussi bien dans le premier (51) que dans le second conducteur (52).
  3. Machine à laver selon la revendication 2, caractérisée en ce que le commutateur (5) peut se déplacer entre la première configuration, la seconde configuration et la troisième configuration.
  4. Machine selon la revendication 1, 2 ou 3, caractérisée en ce que le commutateur (5) reste dans la configuration auparavant adoptée jusqu'à ce qu'il reçoive de la part du capteur (3) du niveau de l'eau le signal indiquant que le niveau d'eau prédéterminé, correspondant à une configuration différente, a été atteint dans le réservoir de lavage (2).
  5. Machine à laver selon n'importe laquelle des revendications précédentes, caractérisé en ce que, pendant le lavage, la présence d'un niveau d'eau minimum prédéterminé dans le réservoir d'eau (2) et l'autorisation d'une entrée d'eau dans le réservoir de lavage (2) sont associées avec une configuration prédéterminée parmi celles que le commutateur (5) peut adopter.
  6. Machine à laver selon n'importe laquelle des revendications précédentes, caractérisée en ce que la présence d'un niveau d'eau maximum prédéterminé dans le réservoir de lavage (2), considéré comme compatible avec un lavage normal, et l'empêchement de l'entrée d'encore plus d'eau dans le réservoir de lavage (2), sont associés avec une configuration prédéterminée parmi celles que le commutateur (5) peut adopter.
  7. Machine à laver selon n'importe laquelle des revendications précédentes, caractérisée en ce que le signalement à l'unité électronique de contrôle (4) qu'un niveau d'eau prédéterminé, excessif et anormal a été atteint est associé à une configuration prédéterminée parmi celles que le commutateur peut adopter.
  8. Machine à laver selon la revendication 7, comprenant des moyens (7) de drainage de l'eau hors du réservoir de lavage (2), les moyens de drainage (7) étant activés par l'unité électronique de contrôle (4) si la configuration signalant un niveau d'eau excessif et anormal est adoptée.
  9. Machine à laver selon n'importe laquelle des revendications précédentes, caractérisée en ce que le commutateur (5) est articulé en un premier point (501) et peut pivoter par rapport au premier point (501) de manière à passer d'une configuration à l'autre.
  10. Machine à laver selon la revendication 9, caractérisée en ce que le commutateur (5) consiste en une petite tige se développant principalement dans une direction.
  11. Machine à laver selon la revendication 9 ou 10, caractérisée en ce que la rotation par rapport au premier point (501) de la tangente du commutateur (5) mesurée en correspondance du premier point (501) se produit toujours dans la même direction, en passant d'une configuration associée à un niveau d'eau inférieur à une configuration associée à un niveau d'eau supérieur et vice versa.
  12. Machine à laver selon la revendication 9, 10 ou 11 lorsqu'elle dépend directement ou indirectement de la revendication 2, caractérisée en ce que dans la première ou la seconde configuration respectivement le premier ou le second conducteur (51, 52) entre en contact avec le commutateur (5) en correspondance d'un second point (502) du commutateur (5), le second point (502) se trouvant à une distance prédéterminée, différente de zéro, par rapport au premier point (501).
  13. Machine à laver selon la revendication 9, 10 ou 11 lorsqu'elle est directement ou indirectement dépendante de la revendication 2, caractérisée en ce que dans la première ou la seconde configuration respectivement le premier ou le second conducteur (51, 52) arrête le commutateur (5) en correspondance d'un second point (502) du commutateur (5), le second point (502) se trouvant à une distance prédéterminée, différente de zéro, par rapport au premier point (501).
  14. Machine à laver selon la revendication 12 ou 13, caractérisée en ce que le commutateur (5) comprend une zone déformable (503) insérée entre le premier point (501) et le second point (502), dans la troisième configuration le premier et le second point (501, 502) restant tels qu'ils se trouvaient dans la seconde configuration alors que la zone déformable (503) se courbe et entre en contact avec le premier conducteur (53).
  15. Machine à laver selon n'importe laquelle des revendications précédentes, caractérisée en ce que le premier conducteur (51) comprend un premier et un second contact électrique (61, 62) conçus pour entrer en contact avec le commutateur (5), les premier et second contacts électriques (61, 62) étant positionnés à une distance prédéterminée l'un par rapport à l'autre, le second conducteur (52) comprenant un troisième contact électrique (63) conçu pour entrer en contact avec le commutateur (5).
  16. Machine à laver selon la revendication 15, caractérisé en ce qu'en correspondance du commutateur (5) le premier conducteur (51) est divisé en une fourche avec deux branches, une première branche (511) comprenant le premier contact (61) et une seconde branche (512) comprenant le second contact (62).
  17. Machine à laver selon la revendication 16, caractérisée en ce que les première et seconde branches (511, 512) sont électriquement connectées en au moins un point commun (513), ledit point commun (513) étant inséré entre le commutateur (5) et l'unité électronique de contrôle (4).
  18. Machine à laver selon la revendication 15, 16 ou 17 lorsqu'elle est directement ou indirectement dépendante de la revendication 2, caractérisée en ce que dans la première configuration le commutateur (5) entre en contact avec le premier contact électrique (61), dans la seconde configuration il entre en contact avec le troisième contact électrique (63) et dans la troisième configuration il entre en contact avec les second et troisième contacts électriques (62, 63).
  19. Machine à laver selon n'importe laquelle des revendications 15 à 18, caractérisée en ce que dans la première configuration le commutateur (5) est arrêté par le premier contact électrique (61) et dans la seconde configuration il est arrêté par le troisième contact électrique (63).
  20. Machine à laver selon n'importe laquelle des revendications 15 à 19, comprenant un pressostat (8) comprenant à son tour le capteur du niveau d'eau (3), le commutateur (5) et les trois contacts (61, 62, 63).
  21. Machine à laver selon n'importe laquelle des revendications précédentes, comprenant un électrodomestique de lavage.
  22. Machine à laver selon n'importe laquelle des revendications précédentes, comprenant une machine à laver.
  23. Machine à laver selon n'importe laquelle des revendications précédentes, comprenant un lave-vaisselle.
EP07734785A 2006-08-10 2007-05-30 Machine à laver avec dispositif de prévention de trop-plein Active EP1928290B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07734785T PL1928290T3 (pl) 2006-08-10 2007-05-30 Urządzenie czyszczące z urządzeniem zabezpieczającym przed przelewem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000050A ITRN20060050A1 (it) 2006-08-10 2006-08-10 Macchina di lavaggio con dispositivo antitrabocco.
PCT/IB2007/001507 WO2008017911A1 (fr) 2006-08-10 2007-05-30 Machine à laver avec dispositif de prévention de trop-plein

Publications (2)

Publication Number Publication Date
EP1928290A1 EP1928290A1 (fr) 2008-06-11
EP1928290B1 true EP1928290B1 (fr) 2009-03-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07734785A Active EP1928290B1 (fr) 2006-08-10 2007-05-30 Machine à laver avec dispositif de prévention de trop-plein

Country Status (7)

Country Link
EP (1) EP1928290B1 (fr)
AT (1) ATE424135T1 (fr)
DE (1) DE602007000638D1 (fr)
ES (1) ES2322824T3 (fr)
IT (1) ITRN20060050A1 (fr)
PL (1) PL1928290T3 (fr)
WO (1) WO2008017911A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007041310B4 (de) 2007-08-31 2016-07-21 BSH Hausgeräte GmbH Wasserführendes Haushaltsgerät
CN105731068B (zh) * 2014-12-24 2019-05-21 炭研轴封精工有限公司 非接触输送装置和非接触吸附盘

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4069425A (en) * 1976-06-03 1978-01-17 General Electric Company Full-time flood protection control for dishwasher
DE3544307A1 (de) * 1985-12-14 1987-06-19 Licentia Gmbh Haushaltsgeraet mit einem wasseranschluss
US7032434B2 (en) * 2003-07-04 2006-04-25 Lg Electronics Inc. Water leakage detecting device in dishwasher

Also Published As

Publication number Publication date
EP1928290A1 (fr) 2008-06-11
WO2008017911A1 (fr) 2008-02-14
ITRN20060050A1 (it) 2008-02-11
ES2322824T3 (es) 2009-06-29
PL1928290T3 (pl) 2009-07-31
DE602007000638D1 (de) 2009-04-16
ATE424135T1 (de) 2009-03-15

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