EP1004266B1 - Grschirrspüler mit Vorwärmungszyklus - Google Patents

Grschirrspüler mit Vorwärmungszyklus Download PDF

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Publication number
EP1004266B1
EP1004266B1 EP99830669A EP99830669A EP1004266B1 EP 1004266 B1 EP1004266 B1 EP 1004266B1 EP 99830669 A EP99830669 A EP 99830669A EP 99830669 A EP99830669 A EP 99830669A EP 1004266 B1 EP1004266 B1 EP 1004266B1
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EP
European Patent Office
Prior art keywords
pump
water
duct
dishwasher according
washing
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
EP99830669A
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English (en)
French (fr)
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EP1004266A1 (de
Inventor
Roberto Bertazzoni
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Smeg SpA
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Smeg SpA
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Publication date
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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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • 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
    • A47L15/4285—Water-heater arrangements

Definitions

  • the present invention relates to dishwashing machines, and in particular to a dishwasher for domestic use provided with means to carry out a pre-heating cycle.
  • the preferred arrangement is that of heating the water directly in the dishwasher at the beginning of the washing cycle, and then again during the cycle in order to keep the water at the required temperature.
  • the initial heating step contributes to the prolonging of the overall duration of the cycle which sometimes the user might wish to shorten, e.g. in order to have the clean dishes available sooner and/or to be able to carry out sooner the washing of another load of dishes.
  • Some types of dishwasher allow to shorten the length of the washing cycle by carrying out a pre-heating cycle prior to the loading of the dishes.
  • the dishwasher when the dishwasher is still empty, the water is loaded and initially heated by activating the washing pump and sprinkling the water through the sprinklers until the desired temperature is reached.
  • the dishwasher indicates to the user that the water has reached the set temperature, then he can load the dishes and start the real washing cycle.
  • the object of the present invention is to provide a dishwasher suitable to overcome the above-mentioned drawbacks.
  • a first fundamental advantage of the dishwasher according to the present invention is that it carries out the pre-heating cycle in a shorter time and with a lower consumption of water and electric power.
  • a second significant advantage of this dishwasher is that it restricts to the tank bottom the spread of hot water, whereby the user does not run any risk of burning himself and can easily load the dishwasher as soon as the pre-heating cycle is over.
  • a further advantage of this restricted spread of the heated water is the greater "thermal inertia" of the machine, which reduces the decrease in temperature of the water in case the user does not immediately start the washing cycle. In this way, there is a reduction in the waste of energy caused by the need to re-heat the water if the user lets it cool down for some time.
  • a dishwasher conventionally includes a washing pump P connected through a first duct C1 to the upper sprinkler U and through a second duct C2 to the lower sprinkler L.
  • the water reaches pump P through a third duct C3 coming from the collecting chamber R formed on the bottom of the tank, a first heating member H1 being spiral-wound around said supply duct C3.
  • One or more further heating members may be provided, for example, in the form of an immersed heater H2 or a contact heater H3 arranged behind a wall of the tank.
  • the temperature of the water is detected in chamber R by a sensor S connected to a control unit (not shown) which provides the deactivation of the heating member(s) when the water reaches the set temperature.
  • the novel aspect of the dishwasher according to the present invention consists of a pair of valves V1, V2 arranged so as to respectively close ducts C1, C2, and of a recirculation duct F branching out from duct C2 (upstream from valve V2) and terminating into chamber R. Also duct F may be closed by a valve VF, if present, which however is not used during the pre-heating step.
  • the dishwasher loads the pre-established amount of water while valves V1 and V2 interrupt the delivery to the upper U and lower L sprinklers, respectively.
  • the pump P is activated together with the heating member H1, whereby the water is heated by circulating only in the lower portion of the dishwasher between pump P and chamber R through ducts F and C3.
  • the control unit deactivates pump P and heater H1 and sends out an optical and/or acoustic signal of "machine ready".
  • pump P and heater H1 are activated again to take the water back to the set temperature.
  • valves V1 and V2 are deactivated through a double opening/closing cycle so as to prevent a thermal shock to the other parts of the machine not affected by the pre-heating.
  • valves V1, V2 are not immediately opened and left open, but they are firstly opened a couple of times for a few seconds and then closed again, before the final opening lasting for the whole washing cycle when, on the contrary, valve VF, if present, is closed.
  • the above-described and illustrated embodiment of the dishwasher according to the invention is just an example susceptible of various modifications.
  • the illustrated embodiment there are provided two valves V1, V2 since pump P has two separate deliveries for the two sprinklers U, L, but it is clear that in case of a single-delivery pump with subsequent branching of ducts C1, C2, F a single three-way valve controlling the delivery to the three ducts C1, C2 and F would be sufficient.
  • the heating of the water may be carried out by a heater placed in a different location with respect to the illustrated heater H1, e.g. a heater in chamber R or on duct F, or by more than one heater.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)

Claims (9)

  1. Geschirrspüler mit einer Spülpumpe (P), die über Ausgangsleitungen (C1, C2) mit Sprühorganen (U, L) verbunden ist, wobei das Wasser die Pumpe (P) über eine Zufuhrleitung (C3) erreicht, die von einer auf dem Boden des Spülbehälters gebildeten Sammelkammer (R) ausgeht, und mit wenigstens einem Heizorgan (H1) zum Erhitzen des Wassers und einem Temperatursensor (S) zum Erfassen der Wassertemperatur, dadurch gekennzeichnet, daß er weiterhin eine Ventileinrichtung (V1, V2) zur Unterbrechung der Wasserzufuhr von der Pumpe (P) zu den Sprühorganen (U, L) sowie eine Rücklaufleitung (F) aufweist, die die Pumpe (P) mit der Sammelkammer (R) verbindet.
  2. Geschirrspüler nach Anspruch 1, dadurch gekennzeichnet, daß er weiterhin eine Ventileinrichtung (VF) zur Unterbrechung der Wasserzufuhr durch die Rücklaufleitung (F) aufweist.
  3. Geschirrspüler nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Spülpumpe (P) eine Zweifachförderpumpe ist, die über eine erste Leitung (C1), in der ein erstes Ventil (V1) montiert ist, mit dem oberen Sprühorgan (U) und über eine zweite Leitung (C2), in der ein zweites Ventil (V2) montiert ist, mit dem unteren Sprühorgan (L) verbunden ist.
  4. Geschirrspüler nach Anspruch 3, dadurch gekennzeichnet, daß die Rücklaufleitung (F) an einem Punkt stromaufwärts des zweiten Ventils (V2) von der zweiten Leitung (C2) abzweigt.
  5. Geschirrspüler nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Spülpumpe (P) eine Einfachförderpumpe ist, an deren Auslaß ein Dreiwegeventil montiert ist, das in der Lage ist, die Zufuhr zu den Sprühorganen (U, L) zu unterbrechen, während die Zufuhr zu der Rücklaufleitung (F) aufrechterhalten bleibt.
  6. Geschirrspüler nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Heizorgan (H1) aus einem Widerstand besteht, der zwischen der Sammelkammer (R) und der Pumpe (P) um die Zufuhrleitung (C3) gewickelt ist.
  7. Geschirrspüler nach einem der mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Temperatursensor (S) die Wassertemperatur im Inneren der Sammelkammer (R) erfaßt.
  8. Vorwärmungszyklus für einen Geschirrspüler nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß er die folgenden Schritte aufweist:
    a) Laden einer vorbestimmten Menge an Wasser,
    b) Aktivieren der Ventileinrichtung zur Unterbrechung der Wasserzufuhr zu den Sprühorganen,
    c) Aktivieren der Spülpumpe und wenigstens eines Heizorgans,
    d) Umwälzen des Wassers zwischen der Pumpe und der Sammelkammer, bis eine eingestellte Temperatur erreicht ist,
    e) Deaktivieren der Pumpe und des wenigstens einen Heizorgans,
    f) Ausgabe eines optischen und/oder akustischen Signals "Maschine bereit"
  9. Spülzyklus für einen Geschirrspüler nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß er einen Vorwärmungszyklus nach Anspruch 8 aufweist, dem die folgenden Schritte folgen;
    a) Deaktivieren der Ventileinrichtung für einige Sekunden,
    b) Erneutes Aktivieren der Ventileinrichtung für einige Sekunden,
    c) Ein- oder mehrmaliges Wiederholen der Schritte a) und b),
    d) Deaktivieren der Ventileinrichtung,
    e) Ausführen der Wasch-, Spül- und ggf. Trocknungsschritte.
EP99830669A 1998-10-28 1999-10-25 Grschirrspüler mit Vorwärmungszyklus Expired - Lifetime EP1004266B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI982305 1998-10-28
IT1998MI002305A IT1303258B1 (it) 1998-10-28 1998-10-28 Lavastoviglie con ciclo di pre-riscaldamento.

Publications (2)

Publication Number Publication Date
EP1004266A1 EP1004266A1 (de) 2000-05-31
EP1004266B1 true EP1004266B1 (de) 2002-12-18

Family

ID=11380947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99830669A Expired - Lifetime EP1004266B1 (de) 1998-10-28 1999-10-25 Grschirrspüler mit Vorwärmungszyklus

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EP (1) EP1004266B1 (de)
DE (1) DE69904559T2 (de)
ES (1) ES2190639T3 (de)
IT (1) IT1303258B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1352605A1 (de) * 2002-04-02 2003-10-15 Bonferraro S.p.A. Spülmaschine mit Mitteln für Kurzzykluswaschprogramm und entsprechendes Waschprogramm
EP1586265A1 (de) * 2004-01-29 2005-10-19 Bonferraro S.p.A. Geschirrspülmaschine mit verbessertem hydraulischen Kreis
EP1738677B1 (de) * 2006-06-23 2008-08-06 V-Zug AG Geschirrspüler mit Dampfgenerator und Verfahren zu dessen Betrieb
ITTO20070347A1 (it) 2007-05-16 2008-11-17 Premark Feg Llc Pompa a doppia mandata per un elettrodomestico, ed elettrodomestico munito della stessa
DE102008043557A1 (de) 2008-11-07 2010-05-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Geschirrspülmaschine
DE102009029185A1 (de) * 2009-09-03 2011-03-10 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit Vorratsbehälter sowie zugehöriges Vorheizverfahren
IT1398885B1 (it) 2010-03-02 2013-03-21 Indesit Co Spa Metodo e macchina per il trattamento di stoviglie
ITTO20120165A1 (it) 2012-02-24 2013-08-25 Premark Feg Llc Pompa a doppia mandata e macchina lavastoviglie provvista di tale pompa
CN106618420B (zh) * 2016-12-05 2024-02-09 宁波吉艾诺节能科技有限公司 一种商用洗碗机
EP3833157A1 (de) * 2019-12-05 2021-06-09 Whirlpool Corporation Haushaltsgerät mit tauchheizer
US11696370B2 (en) 2020-04-22 2023-07-04 Whirlpool Corporation Household appliance with immersible heater

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE497149C (de) * 1928-09-26 1930-05-03 Houben Werke Akt Ges Umsteuervorrichtung fuer Geschirrspuelmaschinen
IT1183898B (it) * 1985-06-21 1987-10-22 Eltek Spa Macchina lavatrice quale lavastoviglie dotata di motore elettrico unico monodirezionale per le funzioni di lavaggio e scarico dell'acqua
IT1280477B1 (it) * 1995-11-10 1998-01-20 Merloni Elettrodomestici Spa Macchina lavastoviglie con possibilita' di lavaggio differenziato
DE19652233C2 (de) * 1996-12-16 1998-11-26 Whirlpool Co Geschirrspülmaschine mit einem unteren und einem oberen Sprüharm sowie einer Umwälzpumpe für das Spülwasser

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Publication number Publication date
DE69904559D1 (de) 2003-01-30
DE69904559T2 (de) 2003-11-20
ITMI982305A1 (it) 2000-04-28
EP1004266A1 (de) 2000-05-31
ITMI982305A0 (it) 1998-10-28
ES2190639T3 (es) 2003-08-01
IT1303258B1 (it) 2000-11-06

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