EP0678274B1 - Mehrzweck-integrierter Zusammenbau für Geschirrspülmaschine - Google Patents

Mehrzweck-integrierter Zusammenbau für Geschirrspülmaschine Download PDF

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Publication number
EP0678274B1
EP0678274B1 EP95200925A EP95200925A EP0678274B1 EP 0678274 B1 EP0678274 B1 EP 0678274B1 EP 95200925 A EP95200925 A EP 95200925A EP 95200925 A EP95200925 A EP 95200925A EP 0678274 B1 EP0678274 B1 EP 0678274B1
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EP
European Patent Office
Prior art keywords
water
washing tub
casing
baffle
segment
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
EP95200925A
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English (en)
French (fr)
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EP0678274A1 (de
Inventor
Silvano Fumagalli
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Candy SpA
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Candy SpA
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    • 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
    • A47L15/4229—Water softening arrangements
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • 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
    • A47L15/4244—Water-level measuring or regulating arrangements

Definitions

  • the present invention relates to a multifunctional integrated assembly for dishwashers.
  • Dishwashers comprise a washing tub on the bottom whereof the water used for washing dishes is collected, and wherefrom it is then pumped to appropriate rotor diffusers. Since the tub is relatively shallow, it is important to control the quantity of water fed into the dishwasher for washing, both at the start of the cycle and for subsequent rinsing operations, in order to avoid overflows.
  • the Italian patent application No. MI92A000957 describes a device for controlling the quantity of water fed into the dishwasher which can be defined as a "partialiser”, in that it measures out the water which is fed into the dishwasher between the washing tub and a measurement tank located outside of the tub and branching off from the supply of clean (and preferably decalcified) water by a feed solenoid valve to the washing tub itself, so as to receive a smaller fraction of water.
  • the control device also comprises detector means (pressure switches, float switches) associated with said tank so as to command closure of the feed solenoid valve when the water contained in the measurement tank itself exceeds a predetermined level.
  • dishwashers comprise a tank for collecting clean water to be used during a particular phase of the washing cycle to carry out so-called "regeneration" of the decalcifying resins, and a device for condensation and discharge of the vapours which are produced during washing in the washing tub of the dishwasher.
  • EP-A-0205787 discloses a dishwashing machine as defined in the preamble of claim 1.
  • the object of the present invention is that of providing a dishwasher machine which groups together the functions of control of the washing liquid feed, of "air break", collection of regeneration liquid and condensation and discharge of vapours, in order to reduce the overall dimensions and times of assembly, and hence the costs, which are otherwise higher should the various functions be performed by separate devices.
  • the numeral 1 in Figure 1 denotes a washing tub for dishwashers.
  • This tub 1 is enclosed in a manner in itself known inside a framework (not shown) forming the external casing of the dishwasher.
  • the dishwasher is provided with a feed solenoid valve 2 whereto a pipe 3 for supplying clean water is connected externally.
  • a rotor 5 is mounted on the bottom 4 of the washing tub 1, approximately in a central position, for diffusing the washing liquid and, below the bottom 4 of the washing tub 1, a collection basin or sump 6 which leads into the interior of the tub 1 via a hole 7 closed by a filtering grid 8.
  • a device 9 for discharging the washing liquid substantially a motor pump.
  • a pump (not shown) which feeds washing liquid to the rotor 5.
  • a multifunctional assembly 10 is also provided, integrating an air break device, a container for collecting the liquid for regenerating decalcifying resins (contained in a decalcification device 16), a measurement tank of a device for controlling the quantity of liquid fed into the tub, and a device for condensation and discharge of vapours.
  • the multifunctional assembly 10 substantially comprises a casing 100 in plastic material shaped externally and internally.
  • the casing 100 has a substantially rectanguLar shape and a reduced thickness in order to be housed in a cavity between the washing tub 1 and the external framework.
  • the casing 100 can for example be obtained by moulding in two complementary and separate parts which are then joined to form a single block, or it can be moulded directly enbloc. In both cases the assembly 10 appears as an enbloc structure integrating the above functions.
  • the air break device consists of a switch 11 formed inside the casing 100 by means of baffles 200 and 201 which define a passage for the liquid coming from a conduit 12 connected to one end of a mouth 106 in one piece with the casing 100, and at the other end to the outlet of the feed solenoid valve 2.
  • This torque 11 consists of a rising section 101, substantially vertical, of a first semicircular section 102, of a second semicircular section 103, and a descending section 104, also substantially vertical.
  • An opening 13 is formed in the second semicircular section 103.
  • the descending section 104 of the bracket 11 ends with a mouth 14 in one piece with the casing 100 whereto a conduit 15 is connected which feeds clean but not yet decalcified water to the decalcification device 16.
  • a conduit 15 is connected which feeds clean but not yet decalcified water to the decalcification device 16.
  • the water flows into a segment 17 containing decalcifying resins and from here, via a conduit 18, a first nozzle 19 and a conduit 20, is sent to the collection basin 6 and then to the washing tub 1.
  • the conduit 18 is also connected, branching off, to a pipe 21 which is connected to a mouth 22 in one piece with the casing 100, and wherein a second nozzle 23 is inserted, whose flow rate is equal to a fraction of the flow rate of the first nozzle 19.
  • the mouth 22 leads into a measurement tank 24 formed inside the casing 100 and bordered laterally and below by the baffle 201 and by a substantially L-shaped baffle 105, and above by a baffle 31.
  • the tank 24 is divided by an assembly of two partition baffles 25 and 28 into two adjacent segments 26 and 27.
  • the baffle 25 is curved in an upturned U shape, while the baffle 28 is substantially vertical: the two partition baffles 25 and 28 define a siphon pipe 29 which connects the bottom of the segment 26 to the bottom of the segment 27.
  • the two segments 26 and 27 also communicate via a passage 30 between the top of the curved section of the baffle 25 and the baffle 31 which defines the tank 24 above.
  • a vertical baffle 32 extends from the baffle 31 almost as far as the bottom of the segment 27, so as to define a pressure chamber 33 at the top whereof a mouth 34 communicates and whereto a capillary tube 35 of a pressure switch 36 is connected.
  • a breather pipe 37 and an additional overflow pipe 38 flow into the baffle 31.
  • a container 39 is formed for water to be used for regenerating decalcifying resins which are found in the segment 17 of the decalcification device 16.
  • This container 39 receives water which, during the feed phase, flows down through the opening 13 of the air break system, and flows over the baffle 31 (slightly tilted for the purpose) which defines the measurement tank 24 above.
  • a mouth 40 and thereto a conduit 41 which feeds water to a segment 42 of the decalcification device 16 containing salts for regenerating decalcifying resins.
  • a mouth 43 with functions of overflow discharge and which is connected via a conduit 44 to a safety lock device 45 of the feed solenoid valve 2 (in itself known).
  • the overflow pipe 38 connected to the tank 24 via an external U-shaped tube 306 flows into the container 39, to transfer into the latter the surplus water and consequently cause triggering of the safety lock device 45.
  • a substantially U-shaped baffle 46 defines a channel for condensation and discharge of vapours 47 which is open above for the release of vapours, and leads via a mouth 48 into the interior of the washing tub 1 so that the vapours pass from the washing tub 1 to the condensation channel 39, and from here, after having been partially condensated, to the exterior.
  • baffles 49 are provided inside the conduit 39. The water produced by condensation flows over them and returns to the washing tub 1 through the mouth 48.
  • the user In order to start a washing cycle, the user must set the programming device (timer) on the panel of the dishwasher to the cycle start point, and actuate a main power supply switch (the programming device and switch are not shown as they are fully standard).
  • the programming device causes the opening of the feed solenoid valve 2 which allows water to flow into the internal water supply circuit of the dishwasher: the water flows into the conduit 12 through the bracket 11 forming the air break device, into the conduit 15, through the segment 17 of the decalcification device 16 and decalcifies, and then, via the conduit 18, the first nozzle 19 and the conduit 20, is fed to the collection basin 6.
  • the level of water in the washing tub 1 starts to rise.
  • the second nozzle 22, whose flow rate is equal to a fraction of that of the first nozzle 19, causes the passage of a fraction of water into the branch pipe 21, water which is fed to the measurement tank 24.
  • the level of water in the tub 1 rises, the level of water in the segment 26 of the tank 24 also rises proportionally.
  • the siphon 29 is triggered to transfer water rapidly into the segment 27 of the measurement tank 24. The water transferred in this way causes gradual filling of the pressure chamber 33 and consequently compression of the air therein.
  • the latter When the pressure of the air is such as to actuate the pressure switch 36, the latter signals this condition to the programming device, which causes closure of the feed solenoid valve 2 and, consequently, interruption of the flow of water in the internal water supply system of the dishwasher.
  • the water in the measurement tank 24 falls, passing through the nozzle 22 and through the conduits 21 and 20 into the collection basin 6, causing the reaching of a static level LS in the washing tub 1, which typically corresponds to a quantity of 5 litres of water.
  • the two nozzles 19 and 22 are for example dimensioned in such a way that, just before triggering of the pressure switch 36, the quantity of water in the washing tub is 4.7 litres, and that in the tank 24 is 0.3 litres, for a total of 5 litres, which represents the normal feed for twelve table settings.
  • the siphon 29 remains triggered until aLL the water which had previously been transferred into the segment 27 of the tank 24 is returned into the segment 26, and from here to the washing tub 1.
  • the described device for controlling the quantity of water in the tub has a disadvantage, linked to the fact that, after the pressure switch 36 has triggered and the solenoid valve 2 has been closed, the pressure chamber 33 is emptied, and the pressure switch 36 consequently de-actuated. If the user voluntarily adjusts the programming device to alter the programmed sequence of phases, setting it to a new water feed phase, there is no way of preventing other water from being fed into the washing tub, causing an overflow. Similarly, if the water feed function is interrupted voluntarily by the user before the required level is achieved in the tub, at the subsequent water feed the tank 24 is empty, and does not take account of the fact that a certain quantity of water is already present in the tub and an overflow may occur.
  • the measurement tank 24 comprises the single segment 26.
  • the siphon pipe 29 ends with a mouth 50 on the bottom of the casing 100.
  • a breather pipe 51 is also formed in the casing 100 and defined by a wall of the baffle 25 and by the baffle 105 which defines the measurement tank.
  • the breather pipe also ends below in a mouth 52 adjacent to the mouth 50.
  • a dish 53 is connected to the mouths 50 and 52 and separated by a baffle 54 into two segments 55 and 56 connecting on the bottom.
  • the segment 55 forms a pressure chamber and the pressure switch 36 is connected thereto.
  • the segment 56 forms a water retaining chamber.
  • a conduit 58 Connected on the bottom of the dish 53 via a solenoid valve 57 with winding in series with the drain pump is a conduit 58 which flows into the washing tub 1.
  • a conduit 59 Connected at the top of the segment 56 is a conduit 59 which also flows into the washing tub.
  • the siphon 29 when, during the water feed phase, the level in the tank 24 exceeds L1, the siphon 29 triggers and rapidly transfers water inside the dish 53.
  • the rise of the level of the water in the pressure chamber 55 causes triggering of the pressure switch 36, which signals to the programming device to close the solenoid valve 2.
  • the siphon 29 remains triggered until all the water of the tank 24 has been transferred into the dish 53, and from here, via the conduit 59, into the washing tub 1.
  • a sufficient quantity of water always remains to keep the pressure switch 36 actuated, so that any further water feed operation which would cause an overflow is avoided.
  • the water in the dish 53 is only discharged when, following actuation of the drain pump, the solenoid valve 57 opens, which allows the water in the dish 53 to flow through the conduit 58 into the washing tub 1, from where it is then discharged.
  • FIG. 5 shows a variant of the dish 53, connected to the casing 100 to form a second variant of a multifunctional integrated assembly according to the invention.
  • This second variant is substantially similar to the one shown in Figure 4.
  • the solenoid valve 57 is not necessary in that the function of discharging of the water contained therein is performed by a siphon pipe 60 which leads into the bottom of the dish 53 and is connected to the bottom of the collection basin 6 (Fig. 6).
  • the pipe 60 is also connected via a conduit 61 to the conduit 20 which feeds decalcified water to the collection basin 6.
  • an overflow discharge pipe 300 can be provided, which is connected to the washing tub 1 through a hole 301, and which is also connected to the safety lock device 45.

Claims (10)

  1. Geschirrspülmaschine, welche ein einziges, aus Kunststoff ausgeformtes Gehäuse (100) aufweist, in welchem eine Expansionsschalteinrichtung (11, 13) in integrierter Bauweise vorgesehen ist, welche Wasser von einem Zufuhrventil (2) erhält und Wasser einer Entkalkungseinrichtung (16) zuführt, wobei ein erster Behälter (39) zur Aufnahme des der Entkalkungseinrichtung zur Regenerierung der entkalkend wirkenden Harze zuzuführenden Wassers dient, eine Einrichtung (47) zur Kondensation und Abgabe des in einem Wasch- bzw. Spülraum der Geschirrspülmaschine vorhandenen Dampfes und eine Steuereinrichtung aufweist, welche die in den Spülraum einzuleitende Wassermenge steuert, dadurch gekennzeichnet, daß die Steuereinrichtung folgendes aufweist:
    einen Meßbehälter (24), welche von dem Gehäuse gebildet wird und ein Volumen besitzt, welches gleich einem fest vorgegebenen Anteil eines vorbestimmten, in den Spülraum einzuleitenden Wasservolumens ist, der Meßbehälter (24) mit einer Wasserversorgungsleitung (18, 19, 20, 21) verbunden ist, um Wasser dem Spülraum von der Entkalkungseinrichtung durch eine Teildurchflußeinrichtung (23) zuzuführen, die eine Durchflußrate hat, die gleich einem Teil der Wasserdurchflußrate der Versorgungsleitung ist, welche zur Versorgung des Spülraums (2) dient, so daß ein fest vorgegebener Anteil des Wasser aufgenommen wird, welches in den Spülraum eingespeist wird, der Meßbehälter (24) über eine Syphonleitung (29) mit einer Druckdetektiereinrichtung (36, 33; 36, 55) verbunden ist, welche dazu bestimmt ist, das Schließen des Zufuhrventils (2) zu steuern, wenn der Wasserpegel im Meßbehälter einen vorbestimmten Pegelstand (L1) erreicht, wodurch angegeben wird, daß ein in den Spülraum eingeleitetes Wasservolumen gleich dem vorbestimmten Volumen ist.
  2. Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Druckdetektiereinrichtung (36, 33; 36, 55) einen Druckschalter (36) aufweist, welcher mit einer Druckkammer (33; 55) verbunden ist.
  3. Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Teildurchflußeinrichtung (23) eine Düse aufweist, welche in eine Öffnung (22) in einstückiger Anordnung in dem Gehäuse (100) eingesetzt ist.
  4. Geschirrspülmaschine nach Anspruch 2 und 3, dadurch gekennzeichnet, daß das einzige Gehäuse ein zweites Segment (27) des Meßbehälters (24) aufweist, welches durch eine erste Zwischenwand (28) im Innern des Gehäuses von einem ersten Segment (26) des Meßbehälters abgetrennt ist, welcher mit dem fest vorgegebenen Anteil des dem Spülraum zuzuführenden Wassers gespeist wird, das zweite Segment (27) in kommunizierender Verbindung mit dem ersten Segment (26) über die Syphonleitung (29) ist, die durch die erste Zwischenwand (28) und eine zweite Zwischenwand (25) ebenfalls im Innern des Gehäuses gebildet wird, und die Syphonleitung derart beschaffen und ausgelegt ist, daß eine Auslösung erfolgt, wenn der Wasserpegel im Innern des ersten Segments (26) den vorbestimmten Wert (L1) erreicht, und das zweite Segment (27) eine Druckkammer (33) aufweist, die durch eine dritte Zwischenwand (32) im Innern des Gehäuses gebildet wird und mit einem Druckschalter (36) verbunden ist.
  5. Geschirrspülmaschine nach Anspruch 2 und 3, dadurch gekennzeichnet, daß der Meßbehälter (24) ein Segment (26) aufweist und die Syphonleitung (29) durch eine erste Zwischenwand (28) und eine zweite Zwischenwand (25) im Innern des Gehäuses (100) gebildet wird, die Syphonleitung zu einem zweiten Behälter (53) geht, welcher unterhalb des Gehäuses angeschlossen ist und eine Übertragungskammer (56), eine Druckkammer (55) und einen Druckschalter (36) aufweist, und eine Übertragungsleitung (59) zur Weiterleitung des Wassers in den Spülraum vorgesehen ist, und die Übertragungsleitung mit der Übertragungskammer in einer solchen Höhe verbunden ist, daß im Anschluß an einen Zuleitungsvorgang von Wasser in den Spülraum (1) die Übertragungskammer eine derart ausreichende Wassersäule enthält, daß der Druckschalter aktiviert bleibt.
  6. Geschirrspülmaschine nach Anspruch 4, dadurch gekennzeichnet, daß eine Einrichtung zum Ausleiten des in dem zweiten Behälter (53) enthaltenen Wassers vorgesehen ist, welche während der Abgabephase des Wassers betätigt werden kann, welches in dem Spülraum (1) enthalten ist.
  7. Geschirrspülmaschine nach Anspruch 5, dadurch gekennzeichnet, daß die Ausleitungseinrichtung eine Leitung (58) aufweist, die in den Boden des zweiten Behälters führt und eine Leitungsströmung in den Spülraum (1) zuläßt, deren Öffnung durch ein Magnetventil (57) gesteuert wird, welches während der Abgabephase des Wassers aus dem Spülraum aktiviert wird.
  8. Geschirrspülmaschine nach Anspruch 5, dadurch gekennzeichnet, daß die Ausleitungseinrichtung eine Syphonleitung (60) aufweist, welche zu einem Sammelbecken (6) geht, welches unterhalb des Spülraums (1) angeordnet ist, und in flüssigkeitsleitender Verbindung mit dem letztgenannten steht, und daß die Syphonleitung (60) während der Abgabephase der Flüssigkeit aus dem Spülraum ausgelöst wird.
  9. Geschirrspülmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Expansionsschalteinrichtung (11, 13) eine Kanalanordnung (11) aufweist, die von den Außenwänden des Gehäuses (100), welche durch eine dritte Zwischenwand (201) und eine vierte Zwischenwand (200) im Innern des Gehäuses gebildet werden, die dritte Zwischenwand ebenfalls eine erste Wand des Meßbehälters (24) bildet, und daß der erste Behälter (29) für das Wasser zur Regenerierung der entkalkenden Harze durch die Außenwände des Gehäuses und durch eine fünfte Zwischenwand (105) im Innern des Gehäuses gebildet wird, wobei die fünfte Zwischenwand ebenfalls eine zweite Wand des Meßbehälters bildet.
  10. Geschirrspülmaschine nach Anspruch 8, dadurch gekennzeichnet, daß die Einrichtung (47) für die Kondensation und die Ableitung des Dampfes eine Kondensationsleitung (47) aufweist, welche durch eine sechste Zwischenwand (46) im Innern des ersten Behälters (39) begrenzt wird, welche in das Innere des Spülraums (1) über eine zweite Öffnung (48) geht.
EP95200925A 1994-04-19 1995-04-12 Mehrzweck-integrierter Zusammenbau für Geschirrspülmaschine Expired - Lifetime EP0678274B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI940285U 1994-04-19
IT94MI000285U IT233259Y1 (it) 1994-04-19 1994-04-19 Gruppo integrato multifunzione per macchina lavastoviglie

Publications (2)

Publication Number Publication Date
EP0678274A1 EP0678274A1 (de) 1995-10-25
EP0678274B1 true EP0678274B1 (de) 2002-01-23

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EP95200925A Expired - Lifetime EP0678274B1 (de) 1994-04-19 1995-04-12 Mehrzweck-integrierter Zusammenbau für Geschirrspülmaschine

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EP (1) EP0678274B1 (de)
DE (1) DE69525094T2 (de)
IT (1) IT233259Y1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1298176B1 (it) * 1998-01-22 1999-12-20 Smeg Spa Dispositivo per controllare e ripristinare il livello di acqua in una macchina lavastoviglie
IT1311704B1 (it) * 1999-08-05 2002-03-19 Electrolux Zanussi Elettrodome Macchina lavastoviglie, in particolare per uso domestico,avente una porta di caricamento funzionale
IT1319801B1 (it) * 2000-01-21 2003-11-03 T & P Spa Dispositivo di caricamento del liquido di lavaggio in una vasca di una macchina di lavaggio di uso domestico, in particolare una
DE102007041305B4 (de) * 2007-08-31 2016-09-15 BSH Hausgeräte GmbH Wasserführendes Haushaltsgerät
KR20090025075A (ko) * 2007-09-05 2009-03-10 엘지전자 주식회사 식기 세척기의 노즐 장치
EP2750578B1 (de) 2011-09-01 2016-05-25 LG Electronics Inc. Geschirrspüler
KR101295946B1 (ko) * 2011-09-01 2013-08-13 엘지전자 주식회사 식기 세척기 및 그의 제어방법
KR101296003B1 (ko) * 2011-09-01 2013-08-14 엘지전자 주식회사 식기 세척기 및 그의 물 공급 장치
ITTO20110984A1 (it) 2011-10-28 2013-04-29 Bitron Spa Dispositivo distributore di acqua

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3522901A1 (de) * 1985-06-26 1987-01-08 Bosch Siemens Hausgeraete Haushalt-geschirrspuelmaschine
DE3522900A1 (de) * 1985-06-26 1987-01-08 Bosch Siemens Hausgeraete Geschirrspuelmaschine
IT215222Z2 (it) * 1988-11-04 1990-09-11 Prealpina Tecnoplastica Dispositivo addolcitore d'acqua per lavastoviglie.
FR2652254A1 (fr) * 1989-09-22 1991-03-29 Esswein Sa Lave-vaisselle muni d'un condenseur d'humidite.
DE4305880C2 (de) * 1993-02-26 1997-07-31 Aeg Hausgeraete Gmbh Haushaltsgerät, wie Geschirrspül- oder Waschmaschine

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Publication number Publication date
EP0678274A1 (de) 1995-10-25
IT233259Y1 (it) 2000-01-26
ITMI940285U1 (it) 1995-10-19
ITMI940285V0 (it) 1994-04-19
DE69525094D1 (de) 2002-03-14
DE69525094T2 (de) 2002-08-22

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