EP1928290B1 - Waschmaschine mit überlaufverhinderungsvorrichtung - Google Patents

Waschmaschine mit überlaufverhinderungsvorrichtung 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
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EP
European Patent Office
Prior art keywords
switch
configuration
contact
conductor
washer according
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Active
Application number
EP07734785A
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English (en)
French (fr)
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EP1928290A1 (de
Inventor
Savio La Bella
Costantino Mariotti
Giovanni Bombardieri
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Whirlpool EMEA SpA
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Indesit Co SpA
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Priority to PL07734785T priority Critical patent/PL1928290T3/pl
Publication of EP1928290A1 publication Critical patent/EP1928290A1/de
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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. Waschmaschine, enthaltend:
    - eine Waschwanne (2), geeignet zur Aufnahme des Wassers, das für den Waschvorgang benutzt wird;
    - einen Fühler (3) zum Erfassen des Wasserstandes in der Waschwanne (2);
    - eine elektronische Steuereinheit (4) der Waschmaschine (1), wobei die elektronische Steuereinheit (4) elektrisch an einen ersten und einen zweiten elektrischen Leiter (51, 52) angeschlossen ist;
    - einen beweglichen Schalter (5) aus einem Material, welches elektrisch leitet, gesteuert durch den Fühler (3) zum Erfassen des Wasserstandes, wobei die ersten und zweiten elektrischen Leiter (51, 52) betrieblich durch Kontakt mit dem Schalter (5) verbunden werden können und der Schalter (5) im Falle des genannten Kontaktes elektrischen Strom an den entsprechenden Leiter (51, 52) liefert; wobei der Fühler (3) zum Erfassen des Wasserstandes ein Signal an den Schalter (5) sendet, welches sich auf das Erreichen von wenigstens drei vorgegebenen Wasserständen in der Waschwanne (2) bezieht;
    wobei die Waschmaschine dadurch gekennzeichnet ist, dass
    - abhängig von dem genannten Signal der Schalter (5) verschiedene Konfigurationen annimmt, jede entsprechend einem der wenigstens drei vorgegebenen Wasserstände;
    - die ersten und zweiten elektrischen Leiter (51, 52) je nach einer binären Logik, damit zusammenhängend, ob ein elektrischer Strom durch jeden elektrischen Leiter (51, 52) oder nicht, wenigstens drei verschiedene Arten von Informationen an die elektronische Steuereinheit (4) übertragen, welche den Wasserstand in der Waschwanne (2) betreffen, wobei jede Art der Information unzweideutig einer der verschiedenen Konfigurationen des Schalters (5) entspricht.
  2. Waschmaschine nach Patentanspruch 1, dadurch gekennzeichnet, dass der Schalter (5) sich zwischen wenigstens drei der folgenden möglichen Konfigurationen bewegen kann:
    - einer ersten Konfiguration, in welcher sich der Schalter nur im Kontakt mit dem ersten Leiter (51) der beiden elektrischen Leiter (51, 52) befindet, wobei die elektronische Steuereinheit (4) den Durchlauf von Strom in dem ersten Leiter (51) und das Fehlen von Strom in dem zweiten Leiter (52) erfasst;
    - einer zweiten Konfiguration, in welcher sich der Schalter nur im Kontakt mit dem zweiten Leiter (52) der beiden elektrischen Leiter (51, 52) befindet, wobei die elektronische Steuereinheit (4) den Durchlauf von Strom in dem zweiten Leiter (52) und das Fehlen von Strom in dem ersten Leiter (51) erfasst;
    - einer dritten Konfiguration, in welcher sich der Schalter mit dem ersten und dem zweiten Leiter (51, 52) im Kontakt befindet, wobei die elektronische Steuereinheit (4) den Durchlauf von Strom in beiden der ersten und zweiten Leiter (51, 52) erfasst;
    - einer vierten Konfiguration, in welcher sich der Schalter weder mit dem ersten noch mit dem zweiten Leiter (51, 52) im Kontakt befindet, wobei die elektronische Steuereinheit (4) das Fehlen von Strom in beiden, den ersten und zweiten Leitern (51, 52) erfasst.
  3. Waschmaschine nach Patentanspruch 2, dadurch gekennzeichnet, dass der Schalter (5) sich zwischen der ersten Konfiguration, der zweiten Konfiguration und der dritten Konfiguration bewegen kann.
  4. Waschmaschine nach Patentanspruch 1 oder 2 oder 3, dadurch gekennzeichnet, dass der Schalter (5) in der im voraus angenommenen Konfiguration bleibt, bis er von dem Fühler (3) zum Erfassen des Wasserstandes das Signal empfängt, welches anzeigt, dass der vorgegebene Wasserstand entsprechend einer anderen Konfiguration in der Waschwanne (2) erreicht worden ist.
  5. Waschmaschine nach einem jeden der vorstehenden Patentansprüche, dadurch gekennzeichnet, dass während des Waschens das Vorhandensein eines bestimmten Mindestwasserstandes in der Waschwanne (2) und die Befähigung zum Zufliessen von Wasser in die Waschwanne (2) einer vorgegebenen Konfiguration unter denen zugeordnet sind, die der Schalter (5) annehmen kann.
  6. Waschmaschine nach einem jeden der vorstehenden Patentansprüche, dadurch gekennzeichnet, dass das Vorhandensein eines bestimmten Höchstwasserstandes in der Waschwanne (2), berücksichtigt als verträglich mit dem normalen Waschgang, und das Verhindern des Zufliessens von jedem weiteren Wasser in die Waschwanne (2) einer vorgegebenen Konfiguration unter denen zugeordnet sind, die der Schalter (5) annehmen kann.
  7. Waschmaschine nach einem jeden der vorstehenden Patentansprüche, dadurch gekennzeichnet, dass die Signalisierung an die elektronische Steuereinheit (4), dass ein bestimmter, übermässiger und anomaler Wasserstand erreicht worden ist, einer vorgegebenen Konfiguration unter denen zugeordnet ist, die der Schalter (5) annehmen kann.
  8. Waschmaschine nach Patentanspruch 7, enthaltend Mittel (7) zum Ablassen des Wassers aus der Waschwanne (2),
    wobei die Ablassmittel (7) durch die elektronische Steuereinheit (4) aktiviert werden, wenn die Konfiguration signalisiert, dass ein übermässiger und anomaler Wasserstand vorhanden ist.
  9. Waschmaschine nach einem jeden der vorstehenden Patentansprüche, dadurch gekennzeichnet, dass der Schalter (5) an einen ersten Punkt (501) angelenkt ist und sich im Verhältnis zu dem ersten Punkt (501) drehen kann, so dass er von einer Konfiguration zu der anderen übergeht.
  10. Waschmaschine nach Patentanspruch 9, dadurch gekennzeichnet, dass der Schalter (5) aus einer kleinen Stange besteht, welche sich vorwiegend in einer Richtung erstreckt.
  11. Waschmaschine nach Patentanspruch 9 oder 10, dadurch gekennzeichnet, dass die Umdrehung im Verhältnis zu dem ersten Punkt (501) der Tangente des Schalters (5), gemessen an dem ersten Punkt (501), stets in der gleichen Richtung erfolgt, und zwar aus einer Konfiguration, die einem niedrigen Wasserstand zugeordnet ist, in eine Konfiguration, die einem höheren Wasserstand zugeordnet ist und umgekehrt.
  12. Waschmaschine nach Patentanspruch 9 oder 10 oder 11, wenn direkt oder indirekt von Patentanspruch 2 abhängig, dadurch gekennzeichnet, dass in der ersten oder der zweiten Konfiguration jeweils der erste oder der zweite Leiter (51, 52) Kontakt mit dem Schalter (5) an einem zweiten Punkt (502) des Schalters (5) hat, wobei sich der zweite Punkt (502) in einem bestimmten Abstand anders als Null von dem ersten Punkt (501) befindet.
  13. Waschmaschine nach Patentanspruch 9 oder 10 oder 11, wenn direkt oder indirekt von Patentanspruch 2 abhängig, dadurch gekennzeichnet, dass in der ersten oder der zweiten Konfiguration jeweils der erste oder der zweite Leiter (51, 52) den Schalter (5) an einem zweiten Punkt (502) des Schalters (5) anhält, wobei sich der zweite Punkt (502) in einem bestimmten Abstand anders als Null von dem ersten Punkt (501) befindet.
  14. Waschmaschine nach Patentanspruch 12 oder 13, dadurch gekennzeichnet, dass der Schalter (5) einen verformbaren Bereich (503) enthält, und zwar zwischen dem ersten Punkt (501) und dem zweiten Punkt (502), wobei in der dritten Konfiguration die ersten und zweiten Punkte (501, 502) bleiben, als wären sie in der zweiten Konfiguration, während sich der verformbare Bereich (503) biegt und in Kontakt mit dem ersten Leiter (53) kommt.
  15. Waschmaschine nach einem jeden der vorstehenden Patentansprüche, dadurch gekennzeichnet, dass der erste Leiter (51) einen ersten und einen zweiten elektrischen Kontakt (61, 62) enthält, dazu bestimmt, mit dem Schalter (5) in Kontakt zu kommen, wobei die ersten und zweiten elektrischen Kontakte (61, 62) in einem bestimmten Abstand voneinander angeordnet sind, und wobei der zweite Leiter (52) einen dritten elektrischen Kontakt (63) enthält, bestimmt, mit dem Schalter (5) in Kontakt zu kommen.
  16. Waschmaschine nach Patentanspruch 15, dadurch gekennzeichnet, dass an dem Schalter (5) der erste Leiter (51) gabelförmig geteilt ist und zwei Abschnitte aufweist, von welchen ein erster Abschnitt (511) den ersten Kontakt (61) enthält und ein zweiter Abschnitt (512) den zweiten Kontakt (62).
  17. Waschmaschine nach Patentanspruch 16, dadurch gekennzeichnet, dass die ersten und zweiten Abschnitte (511, 512) elektrisch an wenigstens einen gemeinsamen Punkt (513) angeschlossen sind, wobei sich der genannte gemeinsame Punkt (513) zwischen dem Schalter (5) und der elektronischen Steuereinheit (4) befindet.
  18. Waschmaschine nach Patentanspruch 15 oder 16 oder 17, wenn direkt oder indirekt von Patentanspruch 2 abhängig, dadurch gekennzeichnet, dass sich der Schalter (5) in der ersten Konfiguration in Kontakt mit dem ersten elektrischen Kontakt (61) befindet, in der zweiten Konfiguration im Kontakt mit dem dritten elektrischen Kontakt (63) und in der dritten Konfiguration im Kontakt mit den zweiten und dritten elektrischen Kontakten (62, 63).
  19. Waschmaschine nach einem jeden der vorstehenden Patentansprüche von 15 bis 18, wenn direkt oder indirekt von Patentanspruch 2 abhängig, dadurch gekennzeichnet, dass in der ersten Konfiguration der Schalter (5) durch den ersten elektrischen Kontakt (61) angehalten wird und in der zweiten Konfiguration wird er angehalten durch den dritten elektrischen Kontakt (63).
  20. Waschmaschine nach einem jeden der vorstehenden Patentansprüche von 15 bis 19, enthaltend einen Druckschalter (8), dieser wiederum enthaltend den Fühler (3) zum Erfassen des Wasserstandes, den Schalter (5) und die drei Kontakte (61, 62, 63).
  21. Waschmaschine nach einem beliebigen der vorstehenden Patentansprüche, enthaltend ein elektrisches Haushaltsgerät zum Waschen.
  22. Waschmaschine nach einem beliebigen der vorstehenden Patentansprüche, enthaltend eine Wäschewaschmaschine.
  23. Waschmaschine nach einem beliebigen der vorstehenden Patentansprüche, enthaltend eine Geschirrspülmaschine.
EP07734785A 2006-08-10 2007-05-30 Waschmaschine mit überlaufverhinderungsvorrichtung Active EP1928290B1 (de)

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 (en) 2006-08-10 2007-05-30 Washer with overflow prevention device

Publications (2)

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

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EP07734785A Active EP1928290B1 (de) 2006-08-10 2007-05-30 Waschmaschine mit überlaufverhinderungsvorrichtung

Country Status (7)

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

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 (de) 2008-06-11
WO2008017911A1 (en) 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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