EP1844693B1 - Dispositif amélioré pour la fourniture et le traitement d'eau pour lave-vaisselle - Google Patents

Dispositif amélioré pour la fourniture et le traitement d'eau pour lave-vaisselle Download PDF

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Publication number
EP1844693B1
EP1844693B1 EP07103564A EP07103564A EP1844693B1 EP 1844693 B1 EP1844693 B1 EP 1844693B1 EP 07103564 A EP07103564 A EP 07103564A EP 07103564 A EP07103564 A EP 07103564A EP 1844693 B1 EP1844693 B1 EP 1844693B1
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EP
European Patent Office
Prior art keywords
tank
water
branch
valve
supply line
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Application number
EP07103564A
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German (de)
English (en)
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EP1844693A1 (fr
Inventor
Enzo Brignone
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Bitron SpA
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Bitron SpA
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Priority to PL07103564T priority Critical patent/PL1844693T3/pl
Publication of EP1844693A1 publication Critical patent/EP1844693A1/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
    • A47L15/42—Details
    • A47L15/4229—Water softening arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B65D81/3294—Thermoformed trays or the like with a plurality of recesses for different materials located in different recesses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
    • B65D85/78—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials for ice-cream

Definitions

  • the present invention relates to a device for supplying and treating water for a dishwashing machine.
  • this device comprises:
  • a device of this kind is described in the PCT patent application WO-2005/060 817 .
  • This known device comprises a divertor which is situated at the branch-off point for the two branches of the supply line and allows directing of the water supplied alternately into the first or the second tank.
  • the water passes through the water-softening substances and is softened so that it can then be introduced into the washing chamber of the dishwashing machine, without the formation of damaging deposits and the like.
  • said operation In the second case, relating instead to the regenerating stage, said operation must be performed periodically in order to reactivate the water-softening substances.
  • the brine formed in the second tank is subsequently made to pass through the water-softening substances, which are typically ion-exchange resins contained in the first tank, and are thus regenerated.
  • the object of the present invention is to provide a device for supplying and treating water for a dishwashing machine which is improved compared to known devices and which in particular does not pose the problem mentioned above.
  • this object is achieved by means of a device of the type indicated at the start of the present description and characterized in that it comprises a valve situated at said branch-off point or a converging point of said first branch and said connection line, said valve being able to assume a first operating configuration where it blocks the outflow from the supply line towards the first tank via the second tank, while it allows the flow along the first branch towards the first tank, so that all the water supplied to the branch-off point is diverted directly into the first tank, and a second operating configuration where it allows both the outflow from the supply line towards the first tank via the second tank and the flow along the first branch towards the first tank, so that the water supplied is diverted into the first tank partly directly and partly via the second tank.
  • the device according to the invention does not require a storage vessel for the water to be supplied to the salt-containing tank.
  • the valve in no operating configuration of the valve is the flow along the first branch of the supply line towards the tank containing the water-softening substances interrupted. Therefore, even in the event of obstruction of the inlet and/or outlet openings of the salt-containing tank, the water supplied to the device may in any case flow outside of it, without giving rise to dangerous overpressure.
  • the regeneration step is performed supplying simultaneously both mains water and brine to the tank containing the water-softening substances.
  • the brine is thus diluted with the advantage that it has a less aggressive action on the water-softening substances.
  • the present invention also relates to a dishwashing machine comprising a water supply and treatment device of the type described above.
  • a water supply and treatment device for a dishwashing machine includes ( Figs. 1 and 2 ) a supply line 10 on which a filling valve 12 and a flowmeter 14 are mounted and which has situated thereafter a blow-off section 16. Downstream of the latter, the line 10 has a branch-off point 18 towards a first branch and a second branch 20, 22.
  • the device also comprises a first tank 24 for containing substances with water-softening properties, having an inlet opening 26 for water to be softened and an outlet opening 28 for softened water, and a second salt-containing tank 30 having a water inlet opening 32 and an outlet opening 34 for a regeneration brine formed following dissolving of the salt in the water.
  • a line 36 connects the second tank 30 to the first tank 24 so that the brine formed in the second tank 30 can flow out towards the first tank 24.
  • the first branch 20 of the supply line 10 leads into the connection line 36, while the second branch 22 leads to the inlet opening 32 of the second tank 30.
  • a valve 38 in particular an electric valve with a shutter element 39, is arranged at the convergence point 40 of the first branch 20 and the connection line 36.
  • the valve 38 is of the three-way type and allows selectively one path to be excluded from the connection with the other two paths which act as inlet and outlet, respectively, and the three paths to be connected so that two paths act as inlets and the remaining path acts as an outlet, as will be described in greater detail below.
  • the valve 38 is de-energized, while, in the condition ( Fig. 2 ) where the three paths are connected together, the valve 38 is energized.
  • the shutter element 39 must not perform any hydraulic sealing function. This is particular advantageous since, in the energized condition, the shutter element 39 is subject to vibrations, making it difficult to ensure effectively a hydraulic seal without having to adopt a complex and costly valve structure.
  • the device may be formed by a first portion comprising the tanks 24, 30 and the supply line part 10 downstream of the blow-off section 16, and by a second portion comprising the upstream part of the supply line 10 including the blow-off section 16. Between the first and the second portion, it is thus required to provide a single hydraulic connection which ensures the continuity of the supply line 10.
  • valve 38 assumes a first operating configuration where it prevents the outflow from the supply line 10 towards the first tank 24 via the second branch 22, the second tank 30 and the connection line 36, while it allows the flow inside the first branch 20 towards the first tank 24. In this way, all the water supplied to the branch-off point 18 is diverted directly (i.e. without passing through the second tank 30) into the first tank 24, where it is softened (cf. arrow 42).
  • the valve 38 assumes a second operating configuration where it allows both outflow from the supply line 10 towards the first tank 24 via the second branch 22, the second tank 30 and the connection line 36 and the flow inside the first branch 20 towards the first tank 24.
  • the water supplied is diverted into the first tank 24 partly (cf. arrow 42) directly and partly (cf. arrow 44) via the second tank 30, where it forms a brine which, passing subsequently through the first tank 24, regenerates the water-softening substances.
  • valve 38 In the second operating configuration, it is possible to regulate the valve 38, varying for example the position of the shutter element 39 and the outflow apertures, so as to adjust in the desired manner the ratio between the fractions of water diverted into the first tank 24 directly and via the second tank 30. It is obvious in fact that the more water is diverted into the first tank 24, the more the brine is diluted.
  • the filling valve 12 is of the adjustable type, it is also possible to vary the total flowrate of the water supplied depending on the operating condition assumed by the valve 38. In particular, it is convenient to reduce the total flowrate of the water during regeneration, so as to avoid the risk of an abnormal pressure increase inside the salt tank 30. When performing this adjustment, it is necessary to take into account the measurement data supplied by the flowmeter 14.
  • valve 38 moreover prevents backflow along the connection line 36 from the first tank 24 towards the second tank 30.
  • an additional non-return valve must be necessarily provided along the corresponding connection line of the device described in WO-2005/060 817 . Consequently, the device according to the invention may dispense with this non-return valve, being even simpler and less costly than the known valve.
  • FIGS 3 and 4 show an alternative embodiment of the device according to the invention, in which the same or equivalent parts are indicated by the same numbers used in the previous figures.
  • valve 38 which is now located at the branch-off point 18 of the supply line 10, while the first branch 20 of the line 10 leads to the inlet opening 26 of the first tank 24, instead of to connection line 36.
  • the valve 38 is still of the three-way type and allows one path to be excluded selectively from the connection with the other two paths which act as inlet and outlet, respectively, and the three paths to be connected together. In this latter case, however, two paths act as outlets and the remaining path acts as an inlet.
  • the method of operation of the device remains substantially the same as that described above.
  • the valve 38 assumes a first operating configuration where it blocks the outflow from the supply line 10 towards the first tank 24 via the second tank 30, preventing the flow of water into the second branch 22. At the same time, the valve 38 allows the flow along the first branch 20 towards the first tank 24 such that all the water supplied to the branch-off point 18 is diverted (cf. arrow 42) directly into the first tank 24, where it is softened.
  • valve 38 assumes a second operating configuration where it allows both the outflow from the supply line 10 towards the first tank 24 via the second branch 22 and the second tank 30 and the flow along the first branch 20 towards the first tank 24.
  • the water supplied is thus diverted into the first tank 24 partly (cf. arrow 42) directly and partly (cf. arrow 44) via the second tank 30, where it forms a brine which, passing subsequently through the first tank 24, regenerates the water-softening substances.
  • FIG. 5 shows a variation of embodiment of the device according to the invention described above, in which the same or equivalent parts are indicated by the same numbers used in the previous figures.
  • the only difference with respect to the device shown in Figures 3 and 4 consists in the additional presence of a non-return valve 46 along the connection line 36.
  • the valve 46 allows only the flow from the second tank 30 towards the first tank 24 and thus prevents, during the water-softening treatment, the water being able to flow from the first tank 24 towards the second tank 30, preventing the risk of abnormal pressure increases inside the latter.
  • the structure of the device and its method of operation are similar to those of the device shown in Figures 3 and 4 .
  • the opening time of the filling valve 12 is determined on the basis of a water flowrate which is not measured directly, but is calculated taking into account the filling time envisaged for the dishwashing machine.

Claims (14)

  1. Dispositif pour alimenter et traiter l'eau pour un lave-vaisselle, comprenant :
    un premier réservoir (24) pour contenir des substances avec des propriétés d'adoucissement de l'eau, ayant au moins une ouverture d'entrée (26) pour l'eau à adoucir et une ouverture de sortie (28) pour l'eau adoucie ;
    un second réservoir (30) contenant du sel, ayant au moins une ouverture d'entrée d'eau (32) et une ouverture de sortie (34) pour une saumure de régénération formée suite à la dissolution du sel dans l'eau,
    une conduite (36) raccordant le second réservoir (30) au premier réservoir (24) de sorte que la saumure formée dans le second réservoir (30) peut s'écouler vers le premier réservoir (24), et
    une conduite d'alimentation d'eau (10) ayant un premier point de bifurcation (18) dans une première ramification (20) alimentant le premier réservoir (24) et dans une seconde ramification (22) qui conduit jusqu'à l'ouverture d'entrée (32) du second réservoir (30),
    ledit dispositif étant caractérisé en ce qu'il comprend une vanne (38) située au niveau dudit point de bifurcation (18) ou à un point de convergence (40) de ladite première ramification (20) et de ladite conduite de raccordement (36), ladite vanne (38) pouvant prendre une première configuration de fonctionnement dans laquelle elle empêche l'écoulement de la conduite d'alimentation (18) vers le premier réservoir (24) via le second réservoir (30), alors qu'elle permet l'écoulement le long de la première ramification (20) vers le premier réservoir (24), de sorte que toute l'eau alimentée au point de bifurcation (18) est déviée directement dans le premier réservoir (24), et une seconde configuration de fonctionnement dans laquelle elle permet à la fois l'écoulement de la conduite d'alimentation (10) dans le premier réservoir (24) via le second réservoir (30) et l'écoulement le long de la première ramification (20) vers le premier réservoir (24), de sorte que l'eau alimentée est déviée dans le premier réservoir (24), partiellement directement et partiellement via le second réservoir (30).
  2. Dispositif selon la revendication 1, caractérisé en ce que ladite vanne (38) est du type à trois voies et permet sélectivement à une trajectoire d'être exclue du raccordement avec les deux autres trajectoires qui servent d'entrée et de sortie, respectivement, et des trois trajectoires à raccorder de sorte que deux servent d'entrées / sorties et la trajectoire restante sert de sortie / entrée.
  3. Dispositif selon la revendication 2, caractérisé en ce que ladite vanne (38) est une vanne électrique qui, à l'état alimenté, raccorde les trois trajectoires sans que l'élément d'obturateur (39) associé doive réaliser une fonction d'étanchéité hydraulique.
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la conduite d'alimentation (10) comprend, en amont du point de bifurcation (18), une section de purge (16).
  5. Dispositif selon la revendication 4, caractérisé en ce qu'il est formé par une première partie comprenant lesdits réservoirs (24, 30) et la partie de la conduite d'alimentation (10) en aval de la section de purge (16) et par une seconde partie comprenant la partie en amont de la conduite d'alimentation (10) qui comprend la section de purge (16), entre lesdites première et seconde parties, il existe un raccordement hydraulique simple qui garantit la continuité de la conduite d'alimentation (10).
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce qu'une vanne de remplissage (12) et un débitmètre (14) sont montés sur ladite conduite d'alimentation (10), en amont de la section de purge (16).
  7. Dispositif selon la revendication 6, caractérisé en ce que la vanne de remplissage (12) peut être ajustée afin de permettre la variation du débit total de l'eau alimentée en fonction de la configuration de fonctionnement prise par ladite vanne à trois voies (38).
  8. Dispositif selon la revendication 7, caractérisé en ce que l'ajustement de la vanne de remplissage (12) est réalisé en prenant en compte les mesures réalisées par ledit débitmètre (14).
  9. Dispositif selon l'une quelconque des revendications 4 ou 5, caractérisé en ce qu'une vanne de remplissage (12) est montée sur la section de ladite conduite d'alimentation (10) en amont de ladite section de purge (16), alors qu'aucun débitmètre n'est monté à cet endroit-là, de sorte que le temps d'ouverture de ladite vanne (12) est déterminé en fonction d'un débit d'eau calculé en utilisant le temps de remplissage envisagé pour le lave-vaisselle.
  10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que, dans ladite seconde configuration de fonctionnement de la vanne (38), le rapport entre les fractions d'eau déviées dans le premier réservoir (24) directement et via le second réservoir (30) est ajustable.
  11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite première ramification (20) de ladite conduite d'alimentation (10) conduit dans ladite conduite de raccordement (36) et ladite vanne (38) est située au point de convergence de ladite première ramification (20) et de ladite conduite de raccordement (36).
  12. Dispositif selon l'une quelconque des revendications 1 à 10 précédentes, caractérisé en ce que ladite première ramification (20) de la conduite d'alimentation (10) conduit à l'ouverture d'entrée (26) du premier réservoir (24) et ladite vanne (38) est située au niveau dudit point de bifurcation (18) de la conduite d'alimentation (10).
  13. Lave-vaisselle comprenant un dispositif selon l'une quelconque des revendications précédentes, dans lequel la vanne (38) prend, pendant l'étape d'alimentation d'eau, ladite première configuration de fonctionnement et pendant la seconde étape pour la régénération des substances d'adoucissement d'eau, ladite seconde configuration de fonctionnement.
  14. Lave-vaisselle selon la revendication 13, dans lequel ledit dispositif comprend une vanne de remplissage (12) qui est alimentée à la fois pendant l'étape d'alimentation d'eau et pendant l'étape de régénération et pendant lesdites deux étapes au moins une partie de l'eau s'écoule vers le premier réservoir (24) sans passer par le second réservoir (30).
EP07103564A 2006-03-07 2007-03-06 Dispositif amélioré pour la fourniture et le traitement d'eau pour lave-vaisselle Active EP1844693B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07103564T PL1844693T3 (pl) 2006-03-07 2007-03-06 Ulepszone urządzenie do dostarczania i uzdatniania wody dla zmywarki do naczyń

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000165A ITTO20060165A1 (it) 2006-03-07 2006-03-07 Dispositivo perfezionato di alimentazione e trattamento di acqua per macchina lavastoviglie.

Publications (2)

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EP1844693A1 EP1844693A1 (fr) 2007-10-17
EP1844693B1 true EP1844693B1 (fr) 2010-03-24

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Country Link
EP (1) EP1844693B1 (fr)
CN (1) CN101041518B (fr)
AT (1) ATE461652T1 (fr)
DE (1) DE602007005413D1 (fr)
ES (1) ES2343279T3 (fr)
IT (1) ITTO20060165A1 (fr)
PL (1) PL1844693T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10646098B2 (en) 2015-06-19 2020-05-12 Bitron S.P.A. Integrated component for a dishwashing machine

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007052085A1 (de) 2007-10-31 2009-05-07 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben eines wasserführendes Haushaltsgeräts
CN102462473B (zh) * 2010-11-18 2014-05-28 比亚迪股份有限公司 洗碗机及其供水装置
ITTO20110775A1 (it) 2011-08-25 2013-02-26 Bitron Spa Dispositivo decalcificatore perfezionato
ITTO20110787A1 (it) * 2011-09-02 2013-03-03 Bitron Spa Dispositivo decalcificatore con rigenerazione a circuito chiuso
ES2633591T3 (es) 2011-12-13 2017-09-22 Ecolab Usa Inc. Método de separación de sustancias químicas en un lavavajillas
KR20130087858A (ko) * 2012-01-30 2013-08-07 삼성전자주식회사 연수화 장치 및 이를 포함하는 식기세척기
ITTO20130338A1 (it) * 2013-04-24 2014-10-25 Bitron Spa Sistema di alimentazione e trattamento di acqua per una macchina lavatrice, in particolare una macchina lavastoviglie
DE202015007584U1 (de) 2014-11-03 2016-02-15 Bitron S.P.A. Verbesserter Wasserenthärtungskreislauf für ein Wasserbearbeitungssystem für eine Waschmaschine/Geschirrspüler und eine Maschine hierfür
KR102543237B1 (ko) * 2015-06-19 2023-06-13 비트론 에스.피.에이. 식기세척기
ES2702491A1 (es) * 2017-09-01 2019-03-01 Bsh Electrodomesticos Espana Sa Máquina lavavajillas doméstica con disposición de tanque

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Publication number Priority date Publication date Assignee Title
PL1701647T3 (pl) * 2003-12-22 2012-10-31 Bsh Hausgeraete Gmbh Zmywarka do naczyń z systemem zmiękczania wody
ITTO20050805A1 (it) * 2005-11-15 2007-05-16 T & P Spa Sistema per abbattere la durezza dell'acqua di lavaggio in una macchina di lavaggio in particolare una lavastoviglie e relativo metodo

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10646098B2 (en) 2015-06-19 2020-05-12 Bitron S.P.A. Integrated component for a dishwashing machine

Also Published As

Publication number Publication date
CN101041518A (zh) 2007-09-26
CN101041518B (zh) 2011-08-03
ES2343279T3 (es) 2010-07-27
EP1844693A1 (fr) 2007-10-17
ITTO20060165A1 (it) 2007-09-08
DE602007005413D1 (de) 2010-05-06
PL1844693T3 (pl) 2010-08-31
ATE461652T1 (de) 2010-04-15

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