EP0553803B1 - Machine à laver la vaisselle - Google Patents

Machine à laver la vaisselle Download PDF

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Publication number
EP0553803B1
EP0553803B1 EP93101244A EP93101244A EP0553803B1 EP 0553803 B1 EP0553803 B1 EP 0553803B1 EP 93101244 A EP93101244 A EP 93101244A EP 93101244 A EP93101244 A EP 93101244A EP 0553803 B1 EP0553803 B1 EP 0553803B1
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EP
European Patent Office
Prior art keywords
washing
phase
wash
dish
phases
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
EP93101244A
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German (de)
English (en)
Other versions
EP0553803B2 (fr
EP0553803A1 (fr
Inventor
Marcello Premoli
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.)
Whirlpool EMEA SpA
Original Assignee
Merloni Elettrodomestici SpA
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Filing date
Publication date
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Application filed by Merloni Elettrodomestici SpA filed Critical Merloni Elettrodomestici SpA
Publication of EP0553803A1 publication Critical patent/EP0553803A1/fr
Publication of EP0553803B1 publication Critical patent/EP0553803B1/fr
Application granted granted Critical
Publication of EP0553803B2 publication Critical patent/EP0553803B2/fr
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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
    • A47L15/0002—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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/02—Pressurised cleaning liquid delivered by a pump

Definitions

  • the present invention refers to a dish-washing machine having various washing programs comprising one or more phases (pre-wash, washing, rinse, Etc) apt to be utilized preferably for the washing of domestic dishes.
  • the mechanical action is realized by means of jets of washing liquid that strike the dishes (or from the movement of garments in the liquid, in the case of laundry washing machines); the chemical action is realised with detergents and by washing additives; the thermic action is based on the different temperatures that the washing liquid may have, in consideration of the fact that a hot liquid removes residues more effectively than a cold liquid.
  • Such actions can be realized together and separately, as, for example, in cold pre-wash phases, without the use of detergents, only a mechanical action is realised; in hot wash phases the three actions are simultaneously realised; in hot pre-wash phases only the mechanical and the thermic actions, and so on.
  • dish-washing machines are realized in order to generally provide for different kinds of washing programs; such different programs are controlled by a suitable programming device, and are selected by the user on the grounds of his needs and on the quantity and characteristics of the soil to be removed. More in detail, dish-washing machines can generally present the following programs:
  • the standard washing program of a dish-washing machine is that typically selected for the washing of dishes that have a normal degree of residues and a certain dryness degree.
  • Such program generally comprises a cold pre-wash, a washing phase at 65°, a first and a second cold rinse (in present day washing machines the tendency of realising a single cold rinse is wide spread), a hot rinse and of a final drying phase.
  • the intensive washing program is that utilized in the case in which dishes are very soiled or the food residues are particularly difficult to remove (for example very dried or burnt residues).
  • Such program generally comprises a hot pre-wash, a washing phase at 65°, a first cold rinse, a second cold rinse, a third hot rinse at 65° and a final drying phase.
  • the economic washing program is utilized for slightly soiled dishes (for example partial loads or dishes with easily removable residues and being composed of plates and glasses without saucepans); it generally consists of a cold pre-wash, a hot washing phase at 55°, a first cold rinse, a second hot rinse at 55° or 65° and a final drying phase.
  • the economic program therefore, is a "reduced" standard program as, due to the characteristics of the residues that must be removed, it has one less cold rinse and the hot washing phase may be carried out at 55° rather than at 65°; it thus allows for the saving of electric energy and of water if compared to the standard program.
  • the rapid washing program however includes a wash at 55°, a single cold or hot rinse at 55° (and an eventual final drying phase). It is utilized in similar cases to the previous, in particular when one wishes to have the washed dishes more rapidly with partial loads.
  • dish-washing phases are naturally realized with the suitable contribution of detergents and rinsing additives, that the user has loaded in suitable dispensers of the dish-washing machine.
  • dish-washing machines are also generally provided with a program for soaking only, that consists in a rapid wetting of the dishes, that is used to moisten and detach the larger particles of the residues and delay the washing of these few dishes until the termination of the successive meal.
  • the present invention is actually based on the recognition of the fact that in normal conditions dishes are washed directly after a meal, i.e. when the residues are still fresh and that therefore an important result in the removal of the residues may be obtained in virtue of the sole mechanical washing action.
  • the aim of the present invention is that of indicating a dish-washing machine equipped with a new program or procedure for the washing of dishes to be utilized when the residues are still fresh, which, in considering the results and water used if compared to a normal washing program, privileges the mechanical action for the removal of the residues and allows an important saving of energy, of time and of detergents.
  • a determined quantity of water, withdrawn from the water mains, is made to reach the washing tub and a pump arranged on the bottom of the same sends it to the rotary sprinklers; through the sprinklers the water is sprayed over the dishes.
  • the water that cascades to the bottom of the tub, after having been filtered, is withdrawn by the pump and re-conveyed to the sprinklers, and so on, until to the termination of the pre-wash phase PF, the duration of which being about 4 minutes.
  • the water is discharged from tub.
  • the following phase constituted by the hot wash indicated with LC, is substantially similar, from a point of view of the mechanical action, to the cold pre-wash phase; it does consist moreover in the fact that the water introduced to the tub and sprayed on the dishes is heated and maintained at a temperature of around 65° (thermic action) by suitable electric resistors, and that a washing powder dispenser introduces detergents to the tub, that is mixed with the water (chemical action). Also upon the termination of this phase, the duration of which being around 30 minutes, the water is discharged from the tub.
  • the successive phase constituted by the cold rinse, indicated with RF, substantially similar to the pre-wash phase PF; the duration of which is however less than 2 minutes approximately (in the case represented, the standard cycle provides for a single cold rinse phase, being quite different to that which occured in the older type of dish-washing machine, that had two distinct cold rinses).
  • the fourth phase constituted by the final hot rinse indicated with RC, substantially similar to the hot wash, inasmuch the water for the rinse is heated to 65° by the previously mentioned resistances; in place of introducing detergents in the tub, however, the washing powder dispenser in this case introduces the rinsing additives.
  • Such phase has a duration of typically about 20 minutes.
  • the dish-washing machine is equipped with a washing program to be utilized for fresh residues, that provides for two phases being substantially cold or at a low temperature, followed by two hot phases, and optionally by a drying phase.
  • a washing program to be utilized for fresh residues that provides for two phases being substantially cold or at a low temperature, followed by two hot phases, and optionally by a drying phase.
  • the first phase is a pre-wash phase, indicated with PF1, realized with cold water and without the use of detergents.
  • This phase realises a mechanical action that allows for the removal of the greater part of the residues.
  • This phase is similar to the cold pre-wash phase of the standard program previously described and has the same duration, i.e. about 4 minutes; upon termination of such phase the water is discharged from the dish-washing machine.
  • the second phase of the program of the machine according to the present invention is substantially identical to the first, but through it the removal of part of the residues that remain after the first pre-wash phase PF1 is obtained; in virtue of the fact that the residues, being relatively simple to remove inasmuch they are fresh, have already undergone a first mechanical action. Also upon termination of this phase, that lasts approximately 4 minutes as in the previous phase, the water is discharged from the machine.
  • the third phase is an actual washing phase, i.e. characterized by the heating of the water and the introduction of detergents in tub.
  • the fourth phase a hot rinse phase, indicated with RC'; this phase is also similar to a hot rinse phase of the standard cycle; in such a phase the rinse liquid is heated to 65°, but the required amount of time required for the heating of the water introduced in the tub is considerably reduced if compared to the time needed in the standard cycle, the quantity of electric energy required also results in being greatly reduced.
  • the washing tub that is generally made of steel, and the dishes inside are still hot.
  • a recovery of thermic energy is therefore realised, due to which the heating of the rinsing water that is introduced in the basin is facilitated and made more rapidily, with consequent savings of electric energy and of cited time.
  • the washing program can be provided with a drying phase of the dishes, in the known way.
  • the dish-washing machine object of the present invention allows for obtaining on fresh residues, in a greatly reduced time and with a reduction of electric energy consumption, the same level of cleanliness of the dishes obtained with a known standard washing cycle.
  • the program described will be advantageously provided as a supplementary cycle of the machine, i.e. as a washing program to flank those normally provided on modern dish-washing machines and will be naturally commanded and selectable by the programmer that supervises the different washing cycles or with switch buttons or rotary selectors.
  • the dish-washing machine is equipped with a program that provides a first cold pre-wash phase, indicated with PF1'', similar to phases PF1 and PF, but which lasts for about two minutes only.
  • the second pre-wash phase, indicated with PF2'' is however realized with water of a low temperature, i.e. approximately 30-35°, and for a period of time of approximately 6 minutes. Therefore in such phase the water is heated by the resistances of the machine and thus to the prevalent mechanical action on the fresh residues remaining from first pre-wash PF1'' a slight thermal action is added.
  • the successive phases of the cycle i.e. the hot wash indicated with LC'', the hot rinse indicated with RC'' and the optional drying phase indicated with AS'', are identical of those described with reference to part B of figure 1.
  • the total time of the two pre-wash phases PF1 and PF2 and that of the two phases PF1'' and PF2'' is the same, as they are substantially equal to the complessive times of the cycle of figure 2 and the cycle of the part B of figure 1.
  • the fact that the second pre-wash phase PF2'' is realized with lukewarm water allows to obtain a slight thermal recovery in favour of the hot wash phase LC'', that could therefore be of a duration being less than 20 minutes.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)

Claims (13)

  1. Lave-vaisselle, comprenant un dispositif de sélection et de commande de plusieurs programmes de lavage, chacun des programmes comprenant une ou plusieurs phases (prélavage, lavage, rinçage, etc.), destiné à être utilisé de préférence pour le lavage de vaisselle domestique, caractérisé par le fait de l'incorporation d'un programme qui est spécifiquement destiné au lavage de vaisselle ayant des résidus frais, le premier programme spécifique pouvant être sélectionné par le dispositif de sélection et de commande et comprenant au moins une phase de prélavage initial (PF1 ; PF1'') à basse température suivie immédiatement d'une seconde phase de prélavage (PF2 ; PF2'') à basse température, si bien que la seconde phase de prélavage (PF2 ; PF2'') à basse température est suivie immédiatement de deux phases à chaud (LC', RC' ; LC'', RC'').
  2. Lave-vaisselle selon la revendication 1, caractérisé en ce que les deux phases à chaud (LC', RC' ; LC'', RC'') comportent une phase de lavage à chaud (LC' ; LC'').
  3. Lave-vaisselle selon la revendication 2, caractérisé en ce que la phase de lavage à chaud (LC' ; LC'') est suivie immédiatement d'une phase de rinçage à chaud (RC' ; RC'').
  4. Lave-vaisselle selon la revendication 3, caractérisé en ce que la phase de rinçage à chaud (RC' ; RC'') est suivie par une phase de rinçage.
  5. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que les phases de prélavage à basse température (PF1, PF2) sont pratiquement identiques.
  6. Lave-vaisselle selon l'une au moins des revendications précédentes, caractérisé en ce que les phases de prélavage à basse température (PF1, PF2) sont réalisées à l'eau froide.
  7. Lave-vaisselle selon l'une au moins des revendications 1 à 5, caractérisé en ce que la première (PF1'') des phases de prélavage à basse température (PF1, PF2) est réalisée à l'eau froide, alors que la seconde (PF2'') des phases de prélavage à basse température (PF1, PF2) est réalisée à l'eau tiède.
  8. Lave-vaisselle selon la revendication 1, caractérisé en ce que la seconde des phases de prélavage à basse température a le double de la durée de la première phase de prélavage à basse température.
  9. Lave-vaisselle selon la revendication 1, caractérisé en ce que le dispositif de sélection et de commande comporte un bouton d'activation du programme spécifique supplémentaire.
  10. Lave-vaisselle selon la revendication 1, caractérisé en ce que le dispositif de sélection et de commande comporte un bouton rotatif pour l'activation du programme spécifique supplémentaire.
  11. Programme de lavage pour lave-vaisselle destiné à l'extraction des salissures ou résidus frais de la vaisselle, comprenant, dans l'ordre indiqué, les phases suivantes :
    une première phase de prélavage à basse température (PF1 ; PF1''),
    une seconde phase de prélavage à basse température (PF2 ; PF2''),
    une phase de lavage à chaud (LC' ; LC''), et
    une phase de rinçage à chaud (RC' ; RC'').
  12. Programme de lavage selon la revendication 11, caractérisé en ce que la première et la seconde phase de prélavage (PF1, PF2 ; PF1'', PF2'') sont réalisées à l'eau froide.
  13. Programme de lavage selon la revendication 11, caractérisé en ce que l'une au moins des phases de prélavage (PF1, PF2 ; PF1'', PF2'') est réalisée à l'eau tiède.
EP93101244A 1992-01-31 1993-01-28 Machine à laver la vaisselle Expired - Lifetime EP0553803B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO920071A IT1256792B (it) 1992-01-31 1992-01-31 Macchina lavastoviglie perfezionata.
ITTO920071 1992-01-31

Publications (3)

Publication Number Publication Date
EP0553803A1 EP0553803A1 (fr) 1993-08-04
EP0553803B1 true EP0553803B1 (fr) 1998-08-19
EP0553803B2 EP0553803B2 (fr) 2005-07-27

Family

ID=11409974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93101244A Expired - Lifetime EP0553803B2 (fr) 1992-01-31 1993-01-28 Machine à laver la vaisselle

Country Status (4)

Country Link
EP (1) EP0553803B2 (fr)
DE (1) DE69320380T3 (fr)
ES (1) ES2121025T5 (fr)
IT (1) IT1256792B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2292131A2 (fr) 2002-05-16 2011-03-09 Electrolux Home Products Corporation N.V. Procédé destiné au fonctionnement d'un lave-vaisselle

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10360552A1 (de) * 2003-12-22 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH Spülmaschinensteuerung zur Bewältigung großer Speiserestmengen durch variierbare Spülprogramme
KR100857797B1 (ko) 2006-09-08 2008-09-09 엘지전자 주식회사 세탁기의 운전방법
DE102008006352A1 (de) * 2008-01-28 2009-07-30 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
DE102008040647A1 (de) 2008-07-23 2010-01-28 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät, insbesondere Geschirrspül- oder Waschmaschine
DE102008040650A1 (de) * 2008-07-23 2010-01-28 BSH Bosch und Siemens Hausgeräte GmbH Spülverfahren für ein wasserführendes Haushaltsgerät
ITPR20120094A1 (it) * 2012-12-28 2014-06-29 Indesit Co Spa Macchina lavastoviglie e programma di lavaggio

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2390757A (en) * 1938-10-22 1945-12-11 Mabel A Voris Dishwashing machine
GB1021051A (en) * 1961-01-02 1966-02-23 Hoover Ltd Method of washing dishes
US4070204A (en) * 1976-01-22 1978-01-24 General Electric Company Low-energy dishwasher
JPS607641Y2 (ja) * 1978-01-11 1985-03-14 シャープ株式会社 食器洗浄機
IT1126118B (it) * 1979-07-09 1986-05-14 Zanussi A Spa Industrie Procedimento di lavaggio intensivo per macchine lavastoviglie e programmatore per la realizzazione di tale procedimento
US4559959A (en) * 1982-10-18 1985-12-24 Hobart Corporation Dishwashing apparatus
DE3316716C2 (de) * 1983-05-06 1985-11-07 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zur Rückgewinnung von Abwärme bei einer Haushalt-Geschirrspülmaschine sowie derartige Maschine zur Durchführung des Verfahrens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2292131A2 (fr) 2002-05-16 2011-03-09 Electrolux Home Products Corporation N.V. Procédé destiné au fonctionnement d'un lave-vaisselle

Also Published As

Publication number Publication date
IT1256792B (it) 1995-12-15
ES2121025T5 (es) 2006-02-16
ITTO920071A0 (it) 1992-01-31
DE69320380D1 (de) 1998-09-24
DE69320380T2 (de) 1998-12-24
EP0553803B2 (fr) 2005-07-27
ES2121025T3 (es) 1998-11-16
EP0553803A1 (fr) 1993-08-04
ITTO920071A1 (it) 1993-07-31
DE69320380T3 (de) 2006-05-24

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