EP0553803B1 - Improved dishwashing machine - Google Patents
Improved dishwashing machine Download PDFInfo
- 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
- Authority
- 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
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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.
Description
- A standard or basic washing program;
- an intensive washing program;
- an economic washing program;
- a rapid washing program;
- a soaking program.
- of the overall time of the washing cycle, due to two successive cold pre-wash phases and to two successive contiguous hot functional phases; in fact with the two pre-washes a major quantity of fresh residues is removed beforehand than is normally so and the hot washing phase is exercised only on the remaining residues; furthermore the heating of the water for the hot rinse, that immediately follows the hot wash, is reached more rapidly, in virtue of the thermal recovery due to the fact that the washing tub and dishes are still hot;
- of electric energy, for the same reasons a reduction of time is also obtained; in fact the washing and the rinsing may be of shorter duration than normal and the energy required for bringing the rinsing water to temperature will be minor, due to the mentioned thermal recovery;
- of detergents, as, in virtue of the fact that the residues are fresh, the mechanical washing action is privileged, by way of the two pre-washes: the detergents required are thus minor.
Claims (13)
- Dish-washing machine, comprising means for the selection and the control of a plurality of washing programs, each of said programs comprising one or more phases (pre-wash, washing, rinse, etc.), apt to be utilized preferably for the washing of domestic dishes, characterized by the fact of providing a program which is specifically designed for washing dishes dirty of fresh residues, said first specific program being selectable through said selection and control means and comprising at least one initial pre-wash phase (PF1;PF1'') at a low temperature immediately followed by a second pre-wash phase (PF2;PF2'') at a low temperature, whereby said second pre-wash phase (PF2;PF2'') at a low temperature is immediately followed by two hot phases (LC',RC';LC'',RC'').
- Dish-washing machine, according to claim 1, characterized in that said two hot phases (LC',RC',LC'',RC'') comprise a hot washing phase (LC';LC'').
- Dish-washing machine, according to claim 2, characterized in that said hot washing phase (LC';LC'') is immediately followed by a hot rinse phase (RC';RC'').
- Dish-washing machine, according to claim 3, characterized in that said hot rinse phase (RC';RC'') is followed by a drying phase.
- Dish-washing machine, according to at least one of the previous claims, characterized in that said low temperature pre-wash phases (PF1,PF2) are substantially identical.
- Dish-washing machine, according to at least one of the previous claims, characterized in that said low temperature pre-wash phases (PF1,PF2) are realized with cold water.
- Dish-washing machine, according to at least one of claims 1 to 5, characterized in that the first (PF1'') of said low temperature pre-wash phases (PF1,PF2) is realized with cold water, while the second (PF2'') of said low temperature pre-wash phases (PF1,PF2) is realized with lukewarm water.
- Dish-washing machine, according to claim 1, characterized in that the second of said low temperature pre-wash phases has twice the duration of said first low temperature pre-wash phase.
- Dish-washing machine, according to claim 1, characterized in that said selection and control means comprise a button for the activation of said supplementary specific program.
- Dish-washing machine, according to claim 1, characterized in that said selection and control means comprise a rotary knob for the activation of said supplementary specific program.
- Washing program for a dishwashing machine, for the removal from the dishes of fresh soil or residues, comprising in the given order the following phases:a first pre-wash phase at a low temperature (PF1;PF1''),a second pre-wash phase at a low temperature (PF2;PF2''),a hot washing phase (LC';LC''),a hot rinsing phase (RC';RC'').
- Washing program, according to claim 11, characterized in that said first and second pre-wash phases (PF1, PF2;PF1'',PF2'') are realized with cold water.
- Washing program, according to claim 11, characterized in that at least one of said pre-wash phases (PF1, PF2;PF1'',PF2'') is realized with lukewarm water.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO920071 | 1992-01-31 | ||
ITTO920071A IT1256792B (en) | 1992-01-31 | 1992-01-31 | DISHWASHER MACHINE PERFECTED. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0553803A1 EP0553803A1 (en) | 1993-08-04 |
EP0553803B1 true EP0553803B1 (en) | 1998-08-19 |
EP0553803B2 EP0553803B2 (en) | 2005-07-27 |
Family
ID=11409974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93101244A Expired - Lifetime EP0553803B2 (en) | 1992-01-31 | 1993-01-28 | Improved dishwashing machine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0553803B2 (en) |
DE (1) | DE69320380T3 (en) |
ES (1) | ES2121025T5 (en) |
IT (1) | IT1256792B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2292131A2 (en) | 2002-05-16 | 2011-03-09 | Electrolux Home Products Corporation N.V. | Method for operating a dishwasher |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10360552A1 (en) | 2003-12-22 | 2005-07-28 | BSH Bosch und Siemens Hausgeräte GmbH | Dishwasher control to cope with large amounts of food by varying wash programs |
KR100857797B1 (en) * | 2006-09-08 | 2008-09-09 | 엘지전자 주식회사 | Operating method of Washing machine |
DE102008006352A1 (en) * | 2008-01-28 | 2009-07-30 | BSH Bosch und Siemens Hausgeräte GmbH | dishwasher |
DE102008040650A1 (en) * | 2008-07-23 | 2010-01-28 | BSH Bosch und Siemens Hausgeräte GmbH | Flushing process for a water-conducting household appliance |
DE102008040647A1 (en) | 2008-07-23 | 2010-01-28 | BSH Bosch und Siemens Hausgeräte GmbH | Water-conducting household appliance, in particular dishwashing or washing machine |
ITPR20120094A1 (en) * | 2012-12-28 | 2014-06-29 | Indesit Co Spa | DISHWASHER MACHINE AND WASHING PROGRAM |
Family Cites Families (7)
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 (en) * | 1978-01-11 | 1985-03-14 | シャープ株式会社 | Dishwasher |
IT1126118B (en) * | 1979-07-09 | 1986-05-14 | Zanussi A Spa Industrie | INTENSIVE WASHING PROCEDURE FOR DISHWASHER MACHINES AND PROGRAMMER FOR THE REALIZATION OF SUCH PROCEDURE |
US4559959A (en) * | 1982-10-18 | 1985-12-24 | Hobart Corporation | Dishwashing apparatus |
DE3316716C2 (en) * | 1983-05-06 | 1985-11-07 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Method for recovering waste heat in a household dishwasher and such a machine for carrying out the method |
-
1992
- 1992-01-31 IT ITTO920071A patent/IT1256792B/en active IP Right Grant
-
1993
- 1993-01-28 EP EP93101244A patent/EP0553803B2/en not_active Expired - Lifetime
- 1993-01-28 ES ES93101244T patent/ES2121025T5/en not_active Expired - Lifetime
- 1993-01-28 DE DE69320380T patent/DE69320380T3/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2292131A2 (en) | 2002-05-16 | 2011-03-09 | Electrolux Home Products Corporation N.V. | Method for operating a dishwasher |
Also Published As
Publication number | Publication date |
---|---|
EP0553803B2 (en) | 2005-07-27 |
ITTO920071A0 (en) | 1992-01-31 |
IT1256792B (en) | 1995-12-15 |
EP0553803A1 (en) | 1993-08-04 |
ES2121025T3 (en) | 1998-11-16 |
DE69320380T2 (en) | 1998-12-24 |
ES2121025T5 (en) | 2006-02-16 |
ITTO920071A1 (en) | 1993-07-31 |
DE69320380D1 (en) | 1998-09-24 |
DE69320380T3 (en) | 2006-05-24 |
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