EP0930044B1 - Lave-vaiselle comportant des jets d'eau à aprrovisionnement en eau sélectif - Google Patents

Lave-vaiselle comportant des jets d'eau à aprrovisionnement en eau sélectif Download PDF

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Publication number
EP0930044B1
EP0930044B1 EP19980123268 EP98123268A EP0930044B1 EP 0930044 B1 EP0930044 B1 EP 0930044B1 EP 19980123268 EP19980123268 EP 19980123268 EP 98123268 A EP98123268 A EP 98123268A EP 0930044 B1 EP0930044 B1 EP 0930044B1
Authority
EP
European Patent Office
Prior art keywords
spraying means
valve
commutable
dishwashing machine
spraying
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
EP19980123268
Other languages
German (de)
English (en)
Other versions
EP0930044A1 (fr
Inventor
Daniele Favaro
Luciano Scian
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 SpA
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Filing date
Publication date
Application filed by Electrolux Zanussi SpA filed Critical Electrolux Zanussi SpA
Publication of EP0930044A1 publication Critical patent/EP0930044A1/fr
Application granted granted Critical
Publication of EP0930044B1 publication Critical patent/EP0930044B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms

Definitions

  • the present invention refers to an automatic dishwashing machine of the type comprising a number of selectively actuatable spraying means for washing the dishes.
  • Dishwashing machines of the above cited kind are largely known in the art.
  • a dishwashing machine which comprises a washing vessel which houses at least a first and at least a second spraying device that are arranged at respective different levels adjacently to respective tableware support racks, and are adapted to be supplied selectively with water, via an associated hydraulic commutator or diverter arrangement, by a recirculating pump.
  • said hydraulic commutator arrangement is capable of being actuated selectively through the provision of appropriate pauses in the operation of the recirculating pump.
  • the wording "at least a first" and "at least a second" spraying device is understood to mean that one or more first spraying means can be supplied with water by the recirculating pump alternatively to one or more similar second spraying devices by actuating the hydraulic commutator arrangement accordingly.
  • the wording "at least a first" and "at least a second" spraying device is understood to mean that one or more first spraying means can be supplied with water by the recirculating pump alternatively to one or more similar second spraying devices by actuating the hydraulic commutator arrangement accordingly.
  • a dishwashing machine in which the recirculating pump is able to selectively supply, via a hydraulic commutator arrangement, either a first spraying device or a pair of second spraying devices, respectively.
  • the first spraying device is arranged in the washing vessel of the machine beneath an upper rack
  • the two second spraying means are arranged beneath a lower rack and above the upper rack, respectively.
  • a dishwasher having a washing vessel in which lower, upper and intermediate spraying means can be supplied selectively with pressurized water, through hydraulic commutating means; to be actuated only one at a time.
  • the commutating means include a plurality of valves that can only cyclically be opened by a motor-operated rotatable cam.
  • Still a further purpose of the present invention is to provide a dishwashing machine of the above cited kind, which is substantially simple and reliable in its overall construction.
  • the dishwashing machine can be noticed to mainly comprise a washing vessel 4 in which there are accomodated at least a first lower spraying means 5, at least a second upper spraying means 6, and at least a further spraying means 7 situated in an intermediate position therebetween.
  • the spraying means 5, 6 and 7 are provided in the form of respective rotating spray arms equipped with respective spray nozzles and adapted to be actuated through corresponding supply conduits 18, 19 and 20 so as to spray the washload items that are arranged in at least a rack housed in the washing vessel 4.
  • At least two such racks are preferably provided in the washing vessel of the machine, which are indicated at 8 and 9, respectively, and are arranged above the rotating spray arm 5 and the rotating spray arm 7, respectively.
  • the lower rotating spray arm 5 is preferably adapted to generate wash water jets 10 that are directed upwards, as well as wash water jets 11 that are directed downwards in view of performing a (per sè known) cleaning action on a per-sè known, and not shown here for reasons of greater simplicity, recirculating filter means lying therebeneath.
  • the upper rotating spray arm 6 is preferably adapted to generate wash water jets 12 directed downwards, as well as wash water jets 13 directed upwards so as to at the same time perform a cleaning action on the ceiling of the washing vessel 4.
  • the intermediate rotating spray arm 7 is preferably adapted to generate wash water jets 14 and 15, which are directed upwards and downwards, respectively.
  • one of the above cited spraying means 5, 6 and 7 may be made to comprise a different number of spray nozzles and/or may be made in a different form, for instance in the form of one or more variously oriented nozzles according to the needs.
  • the lower spraying means 5, the upper spraying means 6 and the intermediate spraying means 7 are adapted to be actuated (ie. to be supplied with water under pressure) only one at a time.
  • the spraying means arm 6 is formed by a given number of associated rotating spray arms (for example, two or more rotating spray arms 6 associated with each other), all of the nozzles that are part of such a spraying means 6 are adapted to be supplied with water at the same time in such a selective manner, ie. alternatively to the nozzles belonging to the other spraying means 5 and 7.
  • Such a selective actuation of the rotating spray arms 5-7 is preferably carried out by means of a recirculating pump 16, whose suction side is connected to the bottom of the washing vessel 4 and whose delivery side 17 is connectable in a selective manner to the conduit 18 or the end portion of a pipe 21 through first hydraulic commutating means 22.
  • the opposite end portion 24 of said pipe 21 is in turn connectable in a selective manner to the conduit 19 or the conduit 20 through second hydraulic commutating means 23.
  • Said hydraulic commutating means 22 and 23 are actuatable, either directly or indirectly, by the programme sequence control switch of the machine (not shown for reasons of greater simplicity) and may therefore be of any type suitable to the purpose.
  • the hydraulic commutating means 22 comprise a commutable three-way valve with a shutter 25 of the stable-unstable type adapted to selectively connect the inlet 17, ie. the delivery side of the pump 16, to one of the outlets 18, 21 according to the duration of the pauses in the operation of the pump 16.
  • a calibrated by-pass (not shown for reasons of greater simplicity) connects the inlet 17 to the outlet 21 of the valve 22.
  • the commutating means 23 comprise a three-way valve similar to the afore cited valve 22, from which it only differs for that fact that its inlet corresponds to the end portion 24 of the pipe 21, instead of the delivery side of the pump 16, so that the two valves 22 and 23 are connected to each other in a cascade-type arrangement. Furthermore, a calibrated by-pass (not shown for reasons of greater simplicity) connects the inlet 24 to the outlet 20 of the valve 23.
  • valves 22 and 23 can be easily calculated by those skilled in the art to most suitably comply with the actual needs.
  • the pump 16 resumes its operation after a pause whose duration is shorter than a pre-determined period T22, the shutter 25 of the valve 22 shuts then the outlet thereof towards the conduit 18.
  • the shutter 25 of the valve 23 starts by initially shutting the outlet thereof towards the conduit 20, so that the pump 16 delivers water under pressure solely to the intermediate rotating spray arm 7 ( Figure 2).
  • the tableware items contained in the upper rack 9 it is therefore possible for the tableware items contained in the upper rack 9 to be most efficiently washed from below (through the jets 14).
  • the possible presence of the lower jets 15 enables the tableware items contained in the lower rack 8 to be submitted to a complementary washing action from above.
  • the pump 16 subsequently resumes operation after a pause whose duration is shorter than a pre-determined period T23 (which preferably, but not necessarily, is equal to the afore cited period T22), the shutter 25 of the valve 23 then shuts the outlet thereof towards the conduit 19.
  • the shutter 25 of the valve 22 keeps holding the outlet thereof towards the conduit 18 shut, so that the pump 16 delivers water under pressure solely to the upper rotating spray arm 6 ( Figure 3).
  • the tableware items contained in the upper rack 9 (as well as in the lower rack 8) to be most efficiently washed from above (through the jets 12).
  • the possible presence of the upper jets 13 enables the ceiling of the washing vessel 4 to undergo a complementary cleaning action.
  • the dishwashing machine enables the tableware items attanged in the racks 8 and/or 9 to be optimally washed and rinsed in a most versatile manner, according to the actual needs and the different load conditions.
  • the dishwashing machine allows also for a final "rinsing" phase of the same tableware items to be performed, at the end of at least a washing phase, with only the upper rotating spray arm 6 being actuated.
  • the action of the jets 12 directed downwards enables the dirt particles removed from the tableware, which would otherwise tend to re-deposit onto the same tableware items, to be on the contrary flushed off towards the bottom of the washing vessel 4 (and therefore towards the drain, not shown).
  • the dishwasher according to the present invention provides another imnportant advantage.
  • the possibility is given for washing programmes to be carried out to handle tableware items arranged on a single one of the afore mentioned racks 8 or 9, while the possibility is in any case maintained for said tableware items to be sprayed alternately from below and from above thanks to the synchronized action of the rotating spray arms 5, 7 or 6, 7, respectively.
  • At least one of the spraying means 5-7 may comprise fixed nozzles, instead of rotating spray arms, which are situated at different respective levels in the washing vessel 4, for instance along the side walls of the same vessel.
  • hydraulic commutating means similar to the afore mentioned means 22 and 23 may be provided in a similar cascade arrangement to selectively supply further spraying means in addition to the spraying means 5-7.
  • the dishwashing machine according to the present invention may further be used to carry out "special" washing programmes, ie. programmes adapted to enable tableware or similar items to be washed, which are so shaped or sized as to take up a particularly great deal of space vertically.
  • "special" washing programmes ie. programmes adapted to enable tableware or similar items to be washed, which are so shaped or sized as to take up a particularly great deal of space vertically.
  • the conduit 19 supplying the intermediate rotating spray arm 7 to be provided in the form of a per sè known (and not shown) type capable of being connected to the valve 23 releasably.
  • the conduit 19 and the therewith associated rotating spray arm 7 are supported by the rack 9 (again in a per sè known manner, not shown in the Figure) and are easily removable from the washing vessel together with the rack 9 itself, as shown in Figure 4.
  • the programme sequence control unit of the machine shall of course be appropriately set so as to cause the lower and the upper rotating spray arms 5, 6 to be supplied alternately.
  • the hydraulic commutating means 22 and 23 in said cascade arrangement are of the afore described type with commutable three-way valves provided with a shutter 25 of the stable-unstable type, switching over from the lower rotating spray arm 5 and the upper rotating spray arm 6, and vice-versa, will take place through a transient in which both the outlet 18 of the valve 22 and the outlet 20 of the valve 23 are shut (in a similar manner as illustrated in Figure 2).
  • Such a transient may anyway have a negligibly short duration, so that no need even arises actually for the outlet 19 of the valve 23 to be plugged by specially providing appropriate shutting means that would undesirably make it much more complicated for the user to go through the whole operation.

Claims (3)

  1. Lave-vaisselle comprenant un compartiment de lavage logeant une pompe (16), des moyens de commutation hydraulique (22, 23), au moins des premiers moyens de pulvérisation -inférieurs, au moins des seconds moyens de pulvérisation supérieurs, et au moins des troisièmes moyens de pulvérisation dans une position intermédiaire entre eux adaptés pour être alimentés de façon sélective avec de l'eau sous pression grâce à des moyens de commutation hydraulique pour pulvériser des jets d'eau respectifs sur les articles de vaisselle disposés sur au moins une étagère prévue dans ledit compartiment de lavage, lesdits au moins premiers moyens de pulvérisation inférieurs (5), lesdits au moins seconds moyens de pulvérisation supérieurs (6) et lesdits au moins troisièmes moyens de pulvérisation intermédiaires (7) étant adaptés pour être actionnés un seul à la fois, caractérisé en ce que lesdits moyens de commutation hydraulique comprennent une première et une seconde vanne trois voies interchangeable (22, 23) reliées dans un agencement en cascade entre lesdits moyens de pulvérisation (5 à 7), de telle sorte qu'une entrée de la première vanne trois voies interchangeable (22) est reliée à la pompe (16) et les sorties sont respectivement reliées au bras de pulvérisation inférieur et à l'entrée de la seconde vanne trois voies interchangeable (23), les sorties de ladite seconde vanne trois voies interchangeable (23) étant respectivement reliées auxdits seconds et troisièmes moyens de pulvérisation.
  2. Lave-vaisselle selon la revendication 1, caractérisé en ce que chacune desdites vannes interchangeables (22, 23) est du type muni de moyens formant robinet d'arrêt stable-instable (25) adaptés pour relier de façon sélective une entrée de celle-ci (17, 24) à une des deux sorties (18, 21 ; 19, 20), dans lequel un dispositif de dérivation calibré est prévu entre ladite entrée et une desdites sorties.
  3. Lave-vaisselle selon la revendication 1, caractérisé en ce que lesdits moyens de pulvérisation intermédiaires supplémentaires (7) sont reliés à la vanne interchangeable respective (23) d'une façon amovible et sont adaptés pour être retirés en vue d'effectuer une phase de lavage et/ou de rinçage dans laquelle seuls lesdits moyens de pulvérisation inférieurs (5) et lesdits moyens de pulvérisation supérieurs (6) sont alimentés de façon sélective.
EP19980123268 1998-01-13 1998-12-07 Lave-vaiselle comportant des jets d'eau à aprrovisionnement en eau sélectif Expired - Lifetime EP0930044B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN980001 1998-01-13
ITPN980001 IT1305652B1 (it) 1998-01-13 1998-01-13 Lavastoviglie con dispositivi di spruzzatura azionabiliselettivamente

Publications (2)

Publication Number Publication Date
EP0930044A1 EP0930044A1 (fr) 1999-07-21
EP0930044B1 true EP0930044B1 (fr) 2003-03-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980123268 Expired - Lifetime EP0930044B1 (fr) 1998-01-13 1998-12-07 Lave-vaiselle comportant des jets d'eau à aprrovisionnement en eau sélectif

Country Status (4)

Country Link
EP (1) EP0930044B1 (fr)
DE (1) DE69811845T2 (fr)
ES (1) ES2193467T3 (fr)
IT (1) IT1305652B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8092611B2 (en) 2009-01-29 2012-01-10 General Electric Company Method and system for dishwasher operation
US8210191B2 (en) 2008-12-09 2012-07-03 General Electric Company Dishwasher having multi-mode spray arm system

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947323A1 (de) * 1999-10-01 2001-04-05 Bsh Bosch Siemens Hausgeraete Haushalt-Geschirrspülmaschine
DE10134917B4 (de) * 2001-07-18 2006-03-16 AEG Hausgeräte GmbH Geschirrspülmaschine mit veränderbarer Flüssigkeitsverteilung
ITUD20010185A1 (it) * 2001-11-19 2003-05-19 Internat Steel Co Spa Macchina di lavaggio
DE10358970A1 (de) † 2003-12-16 2005-07-21 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit Zwischenpumpbetrieb
DE102004004104A1 (de) * 2003-12-23 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit alternierendem Pumpenbetrieb
WO2015049237A1 (fr) * 2013-10-03 2015-04-09 Arcelik Anonim Sirketi Lave-vaisselle à efficacité de lavage améliorée
US9814366B2 (en) 2015-01-14 2017-11-14 Haier Us Appliance Solutions, Inc. Dishwasher appliance and a method for operating a dishwasher appliance
DE102017115920B4 (de) * 2017-07-14 2019-12-05 Winterhalter Gastronom Gmbh Wascharm für eine Geschirrspülmaschine, Geschirrspülmaschine und Verfahren zum Betreiben einer Geschirrspülmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1233812A (fr) * 1958-08-06 1960-10-12 Antonio Zanussi Machine automatique à laver la vaisselle
FR2443231A2 (fr) * 1978-12-08 1980-07-04 Esswein Sa Procede de lavage de la vaisselle, systeme de mise en oeuvre de ce procede, et machine a laver la vaisselle munie d'un tel systeme
IT1234696B (it) * 1989-06-06 1992-05-26 Zanussi A Spa Industrie Lavastoviglie con cesto estraibile regolabile in altezza.
EP0780086A3 (fr) * 1995-12-22 1998-07-15 White Consolidated Industries, Inc. Conduit d'amenée d'eau avec reservoir

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8210191B2 (en) 2008-12-09 2012-07-03 General Electric Company Dishwasher having multi-mode spray arm system
US8092611B2 (en) 2009-01-29 2012-01-10 General Electric Company Method and system for dishwasher operation

Also Published As

Publication number Publication date
DE69811845D1 (de) 2003-04-10
ES2193467T3 (es) 2003-11-01
IT1305652B1 (it) 2001-05-15
ITPN980001A1 (it) 1999-07-13
EP0930044A1 (fr) 1999-07-21
DE69811845T2 (de) 2003-11-13

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