EP0930044B1 - Geschirrspülmaschine mit Sprühvorrichtungen welche wahlweise mit Wasser versorgt werden - Google Patents
Geschirrspülmaschine mit Sprühvorrichtungen welche wahlweise mit Wasser versorgt werden Download PDFInfo
- 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
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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.
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Washing And Drying Of Tableware (AREA)
- Domestic Plumbing Installations (AREA)
Claims (3)
- Geschirrspülmaschine, umfassend:ein Waschbehälter, der eine Pumpe (16) aufnimmt,hydraulische Verbindungsmittel (22, 23),wenigstens erste untere Sprühmittel,wenigstens zweite obere Sprühmittel undwenigstens dritte Sprühmittel in einer Mittelposition hierzwischen, die so angepasst sind, dass sie selektiv mit Wasser unter Druck mittels hydraulischen Umschaltemitteln versorgt werden können, um entsprechende Wasserstrahlen auf Geschirrteile zu sprühen, die in wenigstens einer im Waschbehälter vorgesehenen Halterung bereitgestellt werden, wobeidie wenigstens ersten unteren Sprühmittel (5), die wenigstens zweiten oberen Sprühmittel (6) und die wenigstens dritten mittleren Sprühmittel (7) so angepasst sind, dass nur eines auf einmal betätigt werden kann, dadurch gekennzeichnet, dassdie hydraulischen Umschaltemittel ein erstes und zweites Dreiwege-Umschaltventil (22, 23) umfassen, die in einer Kaskadenanordnung zwischen den Sprühmitteln (5 - 7) derart verbunden sind, dass ein Einlass des ersten Dreiwege-Umschaltventils (22) mit der Pumpe (16) verbunden ist und die Auslässe mit dem unterem Sprüharm bzw. Einlass des zweiten Dreiwege-Umschaltventils (23) verbunden sind, wobeidie Auslässe des zweiten Dreiwege-Umschaltventils (23) mit den zweiten bzw. dritten Sprühmitteln verbunden sind.
- Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, dass jedes Umschaltventil (22, 23) von der Art ist, die mit einem ständigen/nicht ständigen Verschlussmittel (25) versehen ist, das so angepasst ist, dass ein Einlass hiervon (17; 24) mit einem von zwei Auslässen (18, 21; 19, 20) verbunden werden kann, wobei eine kalibrierte Umgehung zwischen dem Einlass und einem der Auslässe vorgesehen ist.
- Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die weiteren mittleren Sprühmittel (7) mit dem entsprechenden Umschalteventil (23) lösbar verbunden sind und so angepasst sind, dass sie für die Durchführung der Wasch- und/oder Spülphase entfernt werden können, in der nur die unteren Sprühmittel (5) und die oberen Sprühmittel (6) selektiv versorgt werden.
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 (de) | 1999-07-21 |
EP0930044B1 true EP0930044B1 (de) | 2003-03-05 |
Family
ID=11395318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980123268 Expired - Lifetime EP0930044B1 (de) | 1998-01-13 | 1998-12-07 | Geschirrspülmaschine mit Sprühvorrichtungen welche wahlweise mit Wasser versorgt werden |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0930044B1 (de) |
DE (1) | DE69811845T2 (de) |
ES (1) | ES2193467T3 (de) |
IT (1) | IT1305652B1 (de) |
Cited By (2)
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)
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 (en) * | 2013-10-03 | 2015-04-09 | Arcelik Anonim Sirketi | A dishwasher with improved washing effectiveness |
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)
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 (de) * | 1995-12-22 | 1998-07-15 | White Consolidated Industries, Inc. | Wasser-Zufuhrrohr mit Behälter |
-
1998
- 1998-01-13 IT ITPN980001 patent/IT1305652B1/it active
- 1998-12-07 DE DE1998611845 patent/DE69811845T2/de not_active Expired - Lifetime
- 1998-12-07 EP EP19980123268 patent/EP0930044B1/de not_active Expired - Lifetime
- 1998-12-07 ES ES98123268T patent/ES2193467T3/es not_active Expired - Lifetime
Cited By (2)
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 |
EP0930044A1 (de) | 1999-07-21 |
IT1305652B1 (it) | 2001-05-15 |
DE69811845T2 (de) | 2003-11-13 |
ITPN980001A1 (it) | 1999-07-13 |
ES2193467T3 (es) | 2003-11-01 |
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