EP1844693B1 - Verbesserte Vorrichtung zur Zuführung und Aufbereitung von Wasser für eine Geschirrspülmaschine - Google Patents

Verbesserte Vorrichtung zur Zuführung und Aufbereitung von Wasser für eine Geschirrspülmaschine 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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Prior art keywords
tank
water
branch
valve
supply line
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EP07103564A
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English (en)
French (fr)
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EP1844693A1 (de
Inventor
Enzo Brignone
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Bitron SpA
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Bitron SpA
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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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (14)

  1. Vorrichtung zur Zuführung und Aufbereitung von Wasser für eine Geschirrspülmaschine, die aufweist:
    - einen ersten Behälter (24) zur Aufnahme von Substanzen mit wasserenthärtenden Eigenschaften, der wenigstens eine Einlassöffnung (26) für zu enthärtendes Wasser und eine Auslassöffnung (28) für enthärtetes Wasser aufweist,
    - einen Salz enthaltenden zweiten Behälter (30), der wenigstens eine Wassereinlassöffnung (32) und eine Auslassöffnung (34) für eine nach Auflösung des Salzes in dem Wasser gebildete Regeneriersole aufweist,
    - eine Leitung (36), die den zweiten Behälter (30) mit dem ersten Behälter (24) verbindet, so dass die in dem zweiten Behälter (30) gebildete Sole zu dem ersten Behälter (24) hin ausströmen kann, und
    - eine Wasserzufuhrleitung (10), die eine erste Verzweigungsstelle (18) in einen ersten Zweig (20), der den ersten Behälter (24) versorgt, und in einen zweiten Zweig (22), der zu der Einlassöffnung (32) des zweiten Behälters (30) führt, aufweist,
    - wobei die Vorrichtung dadurch gekennzeichnet ist, dass sie ein Ventil (38) aufweist, das an der Verzweigungsstelle (18) oder einer zusammenlaufenden Stelle (40) des ersten Zweigs (20) und der Verbindungsleitung (36) angeordnet ist, wobei das Ventil (38) in der Lage ist, eine erste Betriebskonfiguration, in der es den Ausfluss aus der Zufuhrleitung (18) zu dem ersten Behälter (24) hin über den zweiten Behälter (30) verhindert, während es den Fluss entlang des ersten Zweigs (20) zu dem ersten Behälter (24) hin zulässt, so dass das gesamte Wasser, das der Verzweigungsstelle (18) zugeführt wird, unmittelbar in den ersten Behälter (24) abgeleitet wird, und eine zweite Betriebskonfiguration einnimmt, in der es sowohl den Ausfluss aus der Zufuhrleitung (10) zu dem ersten Behälter (24) hin über den zweiten Behälter (30) als auch den Fluss entlang des ersten Zweigs (20) in Richtung des ersten Behälters (24) zulässt, so dass das zugeführte Wasser in den ersten Behälter (24) zum Teil unmittelbar und zum Teil über den zweiten Behälter (30) abgeleitet wird.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Ventil (38) von der Dreiwegebauart ist und wahlweise ermöglicht, dass ein Pfad aus der Verbindung mit den anderen beiden Pfaden, die als Einlass bzw. Auslass dienen, ausgeschlossen wird und dass die drei Pfade derart miteinander verbunden werden können, dass zwei als Einlässe/Auslässe dienen, während der verbleibende eine als ein Auslass/Einlass dient.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das Ventil (38) ein elektrisches Ventil ist, das in dem betätigten Zustand die drei Pfade miteinander verbindet, ohne dass das zugehörige Verschlusselement (39) eine hydraulische Abdichtungsfunktion erfüllen muss.
  4. Vorrichtung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zufuhrleitung (10) stromaufwärts von der Verzweigungsstelle (18) einen Abblasabschnitt (16) aufweist.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass sie durch einen ersten Abschnitt, der die Behälter (24, 30) und den Teil der Zufuhrleitung (10) stromabwärts von dem Abblasabschnitt (16) aufweist, und durch einen zweiten Abschnitt gebildet ist, der den stromaufwärtigen Teil der Zufuhrleitung (10) aufweist, der den Abblasabschnitt (16) enthält, wobei zwischen dem ersten und dem zweiten Abschnitt eine einzelne hydraulische Verbindung existiert, die die Kontinuität der Zufuhrleitung (10) sicherstellt.
  6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass ein Füllventil (12) und ein Durchflussmesser (14) an der Zufuhrleitung (10) stromaufwärts von dem Abblasabschnitt (16) montiert sind.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Füllventil (12) eingestellt werden kann, um eine Veränderung der gesamten Durchflussrate des zugeführten Wassers in Abhängigkeit von der durch das Dreiwegeventil (38) eingenommenen Betriebskonfiguration zu ermöglichen.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Einstellung des Füllventils (12) unter Berücksichtigung der durch den Durchflussmesser (14) durchgeführten Messungen vorgenommen wird.
  9. Vorrichtung nach einem beliebigen der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass ein Füllventil (12) an dem Abschnitt der Zufuhrleitung (10) stromaufwärts von dem Abblasabschnitt (16) montiert ist, während dort keine Durchflussmessvorrichtung montiert ist, so dass die Offenzeit des Ventils (12) auf der Basis einer Wasserdurchflussrate bestimmt wird, die unter Verwendung der für die Geschirrspülmaschine vorgesehenen Füllzeit berechnet wird.
  10. Vorrichtung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der zweiten Betriebskonfiguration des Ventils (38) das Verhältnis zwischen den Wasseranteilen, die in den ersten Tank (24) unmittelbar oder über den zweiten Behälter (30) abgeleitet werden, einstellbar ist.
  11. Vorrichtung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der erste Zweig (20) der Zufuhrleitung (10) in die Verbindungsleitung (36) führt und das Ventil (38) an der Stelle des Zusammenlaufens des ersten Zweigs (20) und der Verbindungsleitung (36) angeordnet ist.
  12. Vorrichtung nach einem beliebigen der vorhergehenden Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der erste Zweig (20) der Zufuhrleitung (10) zu der Einlassöffnung (26) des ersten Behälters (24) führt und das Ventil (38) an der Verzweigungsstelle (18) der Zufuhrleitung (10) angeordnet ist.
  13. Geschirrspülmaschine, die eine Vorrichtung gemäß einem beliebigen der vorhergehenden Ansprüche aufweist, in der das Ventil (38) während des Wasserzufuhrstadiums die erste Betriebskonfiguration und während des zweiten Stadiums zur Regeneration der wasserenthärtenden Substanzen die zweite Betriebskonfiguration einnimmt.
  14. Geschirrspülmaschine nach Anspruch 13, in der die Vorrichtung ein Füllventil (12) aufweist, das sowohl während des Wasserzufuhrstadiums als auch während des Regenerationsstadiums betätigt wird und während der beiden Stadien wenigstens ein Teil des Wassers zu dem ersten Behälter (24) hin strömt, ohne den zweiten Behälter (30) zu durchströmen.
EP07103564A 2006-03-07 2007-03-06 Verbesserte Vorrichtung zur Zuführung und Aufbereitung von Wasser für eine Geschirrspülmaschine Active EP1844693B1 (de)

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.

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

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

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
ES2874093T3 (es) 2011-12-13 2021-11-04 Ecolab Usa Inc Lavavajilla
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
EP3310237B1 (de) * 2015-06-19 2019-06-19 Bitron S.p.A. Integriertes bauelement für eine geschirrspülmaschine
ES2702491A1 (es) * 2017-09-01 2019-03-01 Bsh Electrodomesticos Espana Sa Máquina lavavajillas doméstica con disposición de tanque

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005060817A1 (de) * 2003-12-22 2005-07-07 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit einem system zur wasserenthärtung
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
EP1844693A1 (de) 2007-10-17
DE602007005413D1 (de) 2010-05-06
ATE461652T1 (de) 2010-04-15
ES2343279T3 (es) 2010-07-27
CN101041518A (zh) 2007-09-26
ITTO20060165A1 (it) 2007-09-08
CN101041518B (zh) 2011-08-03
PL1844693T3 (pl) 2010-08-31

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