EP2611348B1 - Lave-vaisselle et procédé d'exploitation associé - Google Patents

Lave-vaisselle et procédé d'exploitation associé Download PDF

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Publication number
EP2611348B1
EP2611348B1 EP11752539.4A EP11752539A EP2611348B1 EP 2611348 B1 EP2611348 B1 EP 2611348B1 EP 11752539 A EP11752539 A EP 11752539A EP 2611348 B1 EP2611348 B1 EP 2611348B1
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EP
European Patent Office
Prior art keywords
temperature
washing liquid
washing
spray arm
liquid
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.)
Active
Application number
EP11752539.4A
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German (de)
English (en)
Other versions
EP2611348A1 (fr
Inventor
Hansjörg Lampe
Stefan Füglein
Gerhard Haider
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 Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP11752539.4A priority Critical patent/EP2611348B1/fr
Publication of EP2611348A1 publication Critical patent/EP2611348A1/fr
Application granted granted Critical
Publication of EP2611348B1 publication Critical patent/EP2611348B1/fr
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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
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/12—Water temperature
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/04—Water pressure or flow rate
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/20—Spray nozzles or spray arms

Definitions

  • the present invention relates to a dishwasher and a method for operating a dishwasher.
  • EP 1 132 038 B1 describes a household dishwashing machine comprising a control system, a washing chamber, wherein at least a first and a second basket are housed, for containing the crockery to be washed, a hydraulic circuit, comprising at least a first and a second liquid sprayer, a pump, a first supply branch for said first sprayer and a second supply branch for said second sprayer, where in order to wash the crockery said pump provides for forcing liquid from the bottom of said tub into said supply branches, for causing a respective liquid flow to exit from each of said sprayers, detergent spraying means, liquid heating means, adjusting means of the amount of liquid forced by said pump into said supply branches, a manually operable selecting means, for selecting the type of crockery contained in said first basket and in said second basket, said selecting means being connected with said control system with information being indicative of the type of crockery contained in said first basket and in said second basket, the control means which, at least during a phase of an operating cycle of the machine, controls
  • EP 2 156 776 discloses a dishwasher and controlling method of the same.
  • EP 2 201 884 discloses a method for preventing kitchenware articles from breaking during washing in a dishwasher.
  • An object of the present invention is to provide a dishwasher and a method for operating a dishwasher which can be charged with heavy duty dishes and delicate dishes at the same washing cycle and which provides an acceptable cleaning result as well as convenient operation by a user.
  • a dishwasher comprises a washing chamber in which at least one upper basket and at least one lower basket for receiving the washing load are or can be arranged, wherein the upper basket can receive more delicate washing load and the lower basket can receive more stable washing load, further comprising a washing liquid circulation system distributing washing liquid within the washing chamber by means of an upper spray arm and a lower spray arm and having at least one pump for supplying washing liquid to both spray arms and further comprising liquid heating means for heating the washing liquid, such that the washing liquid can be heated up at least to a first temperature T 1 and subsequently to a second temperature T 2 , wherein the first temperature T 1 is lower than the second temperature T 2 , and wherein the supply of the washing liquid to the upper spray arm is stopped by the washing liquid circulation system when the washing liquid temperature exceeds the first temperature T 1 and is not continued before the washing liquid temperature falls upon or below the first temperature T 1 , while the lower spray arm is still continued being supplied with washing liquid, and wherein the pump speed of the at least one pump is reduced during heating up the washing liquid from the first
  • At least one upper spray arm and at least one lower spray arm each of which being substantially related to one of the respective baskets are provided.
  • Such an arrangement allows to treat washing load differently depending whether it is arranged in the upper basket or in the lower basket.
  • a measuring system measures the liquid temperature within the sump and transfers the measured value to a control system of the dishwasher.
  • the object of the invention can be solved by a method for operating a dishwasher according to the present invention wherein the dishwasher comprises a washing chamber in which at least one upper basket and at least one lower basket for receiving the washing load are or can be arranged, wherein the upper basket can receive more delicate washing load and the lower basket can receive more stable washing load, wherein the washing liquid is distributed within the washing chamber by means of an upper spray arm and a lower spray arm and wherein the washing liquid is supplied to both spray arms by means of at least one pump comprising the following steps:
  • the delicate washing load in the upper basket is treated carefully with regards to the high temperature of the washing liquid and to the aggressive combination of detergent and hot washing liquid. Further by reducing the pump speed of the at least one pump, the increasing of the temperature of the wash load in the upper basket can be minimized.
  • At least one upper spray arm and at least one lower spray arm each of which being substantially related to one of the respective baskets are provided.
  • Such an arrangement allows to treat washing load differently depending whether it is arranged in the upper basket or in the lower basket.
  • the washing liquid is heated up to at least the first temperature T 1 in a first phase which is a main washing phase and to the second temperature T 2 in a second phase which is a rinse phase ; and/or the main washing phase comprises the steps
  • the temperature of the washing load in the upper basket increases similarly as in the lower basket when the supply of the washing liquid to the upper spray arm is stopped.
  • the temperature of the washing liquid is reduced by substituting hot washing liquid with fresh liquid which allows to treat the delicate washing load more softly.
  • the temperatures of the washing liquid are adapted to the respective detergent.
  • the wash load in the upper basket is treated carefully with regards to the high temperature of the washing liquid and to the aggressive combination of detergent and hot washing liquid. Direct contact of washing liquid and delicate washing load is prevented in the case that the washing liquid comprises very high temperatures or temperatures effecting aggressive to the surfaces of the delicate washing load.
  • the temperature range of 45°C to 50°C is adapted to the activity of the enzyme component of the detergent.
  • the second temperature of 65°C or higher is adapted for cleaning heavy duty dishes which are arranged in the lower basket.
  • a measuring system measures the liquid temperature within the sump and transfers the measured value to a control system of the dishwasher.
  • a dishwasher comprises a washing chamber wherein usually an upper basket and a lower basket for receiving the washing load are arranged and an upper spray arm and a lower spray arm are provided each one being related to one of the respective baskets, wherein washing liquid circulates within the dishwasher and wherein the washing liquid is distributed within the washing chamber by means of the spray arms and wherein the washing liquid is supplied to both spray arms by means of at least one pump and wherein liquid heating means are provided for heating the washing liquid.
  • the upper basket is provided for being loaded with more delicate washing load, e.g. glasses, wherein the lower basket is provided for more stable washing load, e.g. pots or plates.
  • Delicate means in particular the vulnerability of the surface of the dishes.
  • the circulation of the washing liquid usually comprises a sump in a bottom region of the dishwasher, wherein the washing liquid is collected coming from the washing chamber.
  • a pump is arranged in or adjacent to the sump for circulating the washing liquid within the dishwasher or, more precisely, within the circulation system of the dishwasher. Further means for discharging washing liquid from the circulation system and means for feeding the circulation system with fresh liquid are provided.
  • the temperature of the washing liquid might be measured within the sump or on alternative applicable positions, e.g. the spray arms or within the pump. Further the distribution of the washing liquid can be controlled in such a way, that both spray arms can be supplied with washing liquid at the same time, or only one of the spray arm.
  • the liquid heating means and the circulation system of the dishwasher as well as the means for discharging, the means for feeding and distributing the washing liquid can be controlled by a control system.
  • Commands to the control system can be given by a software implemented to a microcontroller connected to the control system or also from a hardware adapted to control the control system or by a user or a maintenance technician.
  • the control system can control the dishwasher in such way that it is able to perform a method according to Fig. 1 .
  • the diagram shows the characteristics "washing liquid temperature” and “washing liquid distribution” over a time line and how the two characteristics correlate with each other.
  • the diagram shows the temperature of the washing liquid as measured within the sump and the periods when both spray arms or only one of the spray arms is supplied with washing liquid.
  • the time line is subdivided in several washing phases.
  • Phase 1 is a pre-wash phase
  • phase 2 is a main wash phase
  • phase 3 is a cold rinse phase
  • phase 4 is a hot rinse phase
  • phase 5 is a drying phase.
  • phase 2 which is the main wash phase
  • the washing liquid is provided with a detergent, wherein the detergent comprises an enzyme component.
  • the washing liquid is heated up to a temperature that is adapted for the use of the detergent, in particular to a first temperature T 1 which enables the enzyme component to be active without being destroyed by a higher temperature.
  • a first temperature T 1 is between 45°C and 50°C, preferedly close to or exactly 50°C.
  • the washing liquid is kept on the first temperature T 1 without further heating up to allow sufficient duration of the enzyme component being active.
  • this treatment it is possible to supply washing liquid to both spray arms or only to the upper spray arm to ensure that the washing load in the upper basket is washed sufficiently during phase 2.
  • the washing liquid is heated up to a second temperature T 2 which can be 65°C or higher.
  • T 2 which can be 65°C or higher.
  • the washing liquid temperature reaches the second temperature T 2 , a part of the washing liquid is drained from the circulation system and substituted with fresh liquid. Thus, the washing liquid temperature is reduced. Phase 2 is continued and terminated with the washing liquid of reduced temperature, wherein the supply of the washing liquid to the upper spray arm remains stopped.
  • the pump speed can be reduced during heating up the washing liquid from the first temperature T 1 to the second temperature T 2 .
  • phase 3 and/or phase 4 which form together a rinse phase
  • the washing liquid temperature is heated up from a first temperature T 1 to a second temperature T 2 , in particular during phase 4 which is a hot rinse phase.
  • the supply of washing liquid to the upper spray arm is stopped when the washing liquid temperature exceeds the first temperature T 1 .
  • rinse aid is added to the washing liquid and during phase 3 a part of the washing liquid is substituted with fresh liquid.
  • the washing liquid temperature during phase 3 does not exceed the first temperature T 1 and therefore the washing liquid is supplied to upper spray arm and the lower spray arm.
  • the washing liquid is drained and replaced with fresh liquid.
  • phase 4 the washing liquid is heated up, wherein the first temperature T 1 is exceeded and therefore the supply of washing liquid to the upper spray arm is stopped.
  • the washing liquid is heated up to the second temperature T 2 .
  • phase 5 which is a drying phase, is started.
  • Fig. 1 the diagram illustrates a division of the characteristics "washing liquid temperature” and "washing liquid distribution" in sections A to E.
  • section A washing liquid is supplied to the upper spray arm and the lower spray arm, the distribution of the washing liquid is to both at the same time or only one at a time changing after a certain time, wherein the washing liquid temperature is low and the pressure with which the washing liquid is distributed by the spray arms is also low.
  • section B the supply of washing liquid to the upper spray arm is stopped. Only the lower spray arm receives washing liquid. The washing liquid temperature is high and the washing liquid pressure is also high.
  • section C as in section A, the washing liquid is supplied to the upper spray arm and the lower spray arm, wherein the washing liquid temperature is low and the pressure with which the washing liquid is distributed by the spray arms is also low.
  • section D the supply of washing liquid to the upper spray arm is stopped, wherein the washing liquid temperature is high and the washing liquid pressure is low.
  • section E the circulation of the washing liquid is stopped completely.
  • a preferred ratio of pressures to be provided in the upper and the lower spray arm is shown in the following table. Section Sprayarm pressure Upper Lower A ⁇ 70 200 B 0 200 C ⁇ 70 ⁇ 140 D 0 110

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (7)

  1. Lave-vaisselle comportant une chambre de lavage dans laquelle au moins un panier supérieur et au moins un panier inférieur destinés à recevoir la charge à laver sont ou peuvent être disposés, le panier supérieur pouvant recevoir une charge à laver plus délicate et le panier inférieur pouvant recevoir une charge à laver plus stable, comportant en outre un système de circulation de liquide de lavage distribuant du liquide de lavage à l'intérieur de la chambre de lavage au moyen d'un bras gicleur supérieur et d'un bras gicleur inférieur et possédant au moins une pompe servant à fournir du liquide de lavage aux deux bras gicleurs et comportant en outre un moyen de chauffage de liquide servant à chauffer le liquide de lavage, de telle façon que le liquide de lavage puisse être chauffé jusqu'à au moins une première température T1, habituellement entre 45°C et 50°C et ultérieurement jusqu'à une seconde température T2, qui peut être de 65°C ou supérieure, la première température T1 étant inférieure à la seconde température T2, et caractérisé en ce que le lave-vaisselle est configuré de telle sorte que l'alimentation en liquide de lavage du bras gicleur supérieur soit stoppée par le système de circulation de liquide de lavage lorsque la température du liquide de lavage dépasse la première température T1 et ne soit pas continuée avant que la température du liquide de lavage baisse jusqu'à ou au-dessous de la première température T1, tandis que le bras gicleur inférieur continue encore à être alimenté en liquide de lavage et la vitesse de pompe de la ou des pompes étant réduite pendant le chauffage du liquide de lavage de la première température T1 à la seconde température T2.
  2. Lave-vaisselle selon la revendication 1, caractérisé en ce que dans la chambre de lavage sont placés au moins un bras gicleur supérieur et au moins un bras gicleur inférieur, chacun de ceux-ci étant sensiblement lié à un des paniers respectifs.
  3. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce qu'un système de mesure est configuré pour mesurer la température de liquide à l'intérieur de la cuve et transférer la valeur mesurée à un système de commande du lave-vaisselle.
  4. Procédé d'exploitation d'un lave-vaisselle, le lave-vaisselle comportant une chambre de lavage dans laquelle au moins un panier supérieur et au moins un panier inférieur destinés à recevoir la charge à laver sont ou peuvent être disposés, le panier supérieur pouvant recevoir une charge à laver plus délicate et le panier inférieur pouvant recevoir une charge à laver plus stable, le liquide de lavage étant distribué à l'intérieur de la chambre de lavage au moyen d'un bras gicleur supérieur et d'un bras gicleur inférieur et le liquide de lavage étant fourni aux deux bras gicleurs au moyen d'au moins une pompe, comportant les étapes suivantes :
    - chauffer le liquide de lavage au moins jusqu'à une première température T1 habituellement entre 45°C et 50°C et ultérieurement jusqu'à une seconde température T2, qui peut être de 65°C ou supérieure, la première température T1 étant inférieure à la seconde température T2 ; caractérisé en ce qu'il comporte en outre les étapes consistant à :
    - stopper l'alimentation en liquide de lavage du bras gicleur supérieur lorsque la température du liquide de lavage dépasse la première température T1, jusqu'à ce que la température du liquide de lavage baisse jusqu'à ou au-dessous de la première température T1 tandis que le bras gicleur inférieur continue encore à être alimenté en liquide de lavage ;
    - réduire la vitesse de pompe de la ou des pompes pendant le chauffage du liquide de lavage de la première température T1 à la seconde température T2.
  5. Procédé d'exploitation d'un lave-vaisselle selon la revendication 4, caractérisé en ce que dans la chambre de lavage sont placés au moins un bras gicleur supérieur et au moins un bras gicleur inférieur, chacun de ceux-ci étant sensiblement lié à un des paniers respectifs.
  6. Procédé d'exploitation d'un lave-vaisselle selon l'une des revendications 4 ou 5, comportant une phase principale de lavage et une phase de rinçage, et présentant les caractéristiques suivantes telles que a.) le liquide de lavage soit chauffé jusqu'à au moins la première température T1 lors d'une première phase qui est la phase principale de lavage et jusqu'à la seconde température T2 lors d'une seconde phase qui est la phase de rinçage ; et/ou
    b.) la phase principale de lavage comporte les étapes consistant à
    - chauffer le liquide de lavage comportant un détergent jusqu'à une première température T1 qui est adaptée au détergent, en particulier à un composant enzymatique du détergent ;
    - maintenir la première température T1 pendant une période définie ;
    - chauffer le liquide de lavage jusqu'à la seconde température T2, l'alimentation en liquide de lavage du bras gicleur supérieur étant stoppée dès que la température du liquide de lavage dépasse la première température T1 ; et/ou
    c.) la phase de rinçage comporte les étapes consistant à
    - ajouter un adjuvant de rinçage au liquide de lavage ;
    - chauffer le liquide de lavage jusqu'à la seconde température T2 ou au-delà, l'alimentation en liquide de lavage du bras gicleur supérieur étant stoppée dès que la température du liquide de lavage dépasse la première température T1 ; et/ou
    d.) la phase principale de lavage et/ou la phase de rinçage comportent la vidange d'au moins une partie du liquide de lavage par des vidanges du système de circulation de liquide en le remplaçant par du liquide frais dès que la température du liquide de lavage dépasse la seconde température T2 .
  7. Procédé d'exploitation d'un lave-vaisselle selon l'une des revendications 4, 5 ou 6, caractérisé en ce que la température de liquide est mesurée par un système de mesure à l'intérieur de la cuve qui transfère la valeur mesurée à un système de commande du lave-vaisselle.
EP11752539.4A 2010-09-03 2011-09-02 Lave-vaisselle et procédé d'exploitation associé Active EP2611348B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11752539.4A EP2611348B1 (fr) 2010-09-03 2011-09-02 Lave-vaisselle et procédé d'exploitation associé

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10175310A EP2425758A1 (fr) 2010-09-03 2010-09-03 Lave-vaisselle et procédé de fonctionnement d'un lave-vaisselle
PCT/EP2011/065180 WO2012028710A1 (fr) 2010-09-03 2011-09-02 Lave-vaisselle et procédé d'exploitation associé
EP11752539.4A EP2611348B1 (fr) 2010-09-03 2011-09-02 Lave-vaisselle et procédé d'exploitation associé

Publications (2)

Publication Number Publication Date
EP2611348A1 EP2611348A1 (fr) 2013-07-10
EP2611348B1 true EP2611348B1 (fr) 2023-11-08

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Family Applications (2)

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EP10175310A Withdrawn EP2425758A1 (fr) 2010-09-03 2010-09-03 Lave-vaisselle et procédé de fonctionnement d'un lave-vaisselle
EP11752539.4A Active EP2611348B1 (fr) 2010-09-03 2011-09-02 Lave-vaisselle et procédé d'exploitation associé

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP10175310A Withdrawn EP2425758A1 (fr) 2010-09-03 2010-09-03 Lave-vaisselle et procédé de fonctionnement d'un lave-vaisselle

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EP (2) EP2425758A1 (fr)
PL (1) PL2611348T3 (fr)
WO (1) WO2012028710A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104665740B (zh) * 2015-02-11 2017-06-06 佛山市顺德区美的洗涤电器制造有限公司 一种洗碗机及其洗涤加热控制方法和装置
DE102017102057B4 (de) 2016-02-29 2019-05-09 Miele & Cie. Kg Verfahren zum Betrieb eines Geschirrspülautomaten
DE102017208562A1 (de) 2017-05-19 2018-11-22 BSH Hausgeräte GmbH Geschirrspülmaschine und Verfahren zum Betreiben einer Geschirrspülmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2441361A1 (de) * 1974-08-29 1976-03-11 Bosch Siemens Hausgeraete Verfahren zum reinigen von geschirr in einer geschirrspuelmaschine
DE2911005A1 (de) * 1979-03-21 1980-09-25 Licentia Gmbh Verfahren zum reinigen von geschirr in einer haushaltgeschirrspuelmaschine und haushaltgeschirrspuelmaschine zur durchfuehrung des verfahrens
IT1319915B1 (it) * 2000-02-24 2003-11-12 Merloni Elettrodomestici Spa Macchina lavastoviglie con possibilita' di lavaggio differenziato.
DE10222216A1 (de) * 2002-05-16 2003-11-27 Electrolux Home Prod Corp Verfahren zum Betreiben einer Geschirrspülmaschine, Geschirrspülmaschine
DE10257826A1 (de) * 2002-05-16 2003-11-27 Electrolux Home Prod Corp Geschirrspülmaschine und Verfahren zum Betreiben einer Geschirrspülmaschine bei Verwendung von einem Kombinationspräparat mit mehreren Wirkstoffen
KR101556124B1 (ko) * 2008-08-21 2015-09-30 엘지전자 주식회사 식기세척기 및 식기세척기의 제어방법
KR20100023172A (ko) * 2008-08-21 2010-03-04 엘지전자 주식회사 식기세척기의 제어방법
IT1392419B1 (it) 2008-12-22 2012-03-02 Indesit Co Spa Metodo per evitare la rottura di stoviglie durante il lavaggio in una lavastoviglie.

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Publication number Publication date
EP2425758A1 (fr) 2012-03-07
WO2012028710A1 (fr) 2012-03-08
EP2611348A1 (fr) 2013-07-10
PL2611348T3 (pl) 2024-04-08

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