EP1721558A2 - Verfahren und Vorrichtung zur Zuführung von Wasser in einer Waschmaschine - Google Patents

Verfahren und Vorrichtung zur Zuführung von Wasser in einer Waschmaschine Download PDF

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Publication number
EP1721558A2
EP1721558A2 EP06113866A EP06113866A EP1721558A2 EP 1721558 A2 EP1721558 A2 EP 1721558A2 EP 06113866 A EP06113866 A EP 06113866A EP 06113866 A EP06113866 A EP 06113866A EP 1721558 A2 EP1721558 A2 EP 1721558A2
Authority
EP
European Patent Office
Prior art keywords
water
tank
elements
outlet
decalcification
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.)
Withdrawn
Application number
EP06113866A
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English (en)
French (fr)
Other versions
EP1721558A3 (de
Inventor
Carlo Sgarbossa
Carlo Carli
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.)
Invensys Controls Italy SRL
Original Assignee
Invensys Controls Italy SRL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Invensys Controls Italy SRL filed Critical Invensys Controls Italy SRL
Publication of EP1721558A2 publication Critical patent/EP1721558A2/de
Publication of EP1721558A3 publication Critical patent/EP1721558A3/de
Withdrawn legal-status Critical Current

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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
    • A47L15/42—Details
    • A47L15/4229—Water softening arrangements
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops

Definitions

  • the present invention concerns a device and the relative method for feeding water into a washer machine, in particular a dishwasher, glass-washer or suchlike.
  • the invention also concerns an anti-calcium unit for a washer machine which uses said device for feeding water.
  • the anti-calcium treatment is performed by a unit normally comprising a first container filled with a saline solution having a desired degree of saturation, and a second container containing ion exchange resins which, as the washing water passes, determine a huge reduction of its calcium content.
  • too low a hardness of the water can cause damage to glasses and the more delicate dishes, to such an extent that the surfaces become worn and fragile.
  • a negative formation of foam may also be generated, particularly in the event of excessive use of detergent.
  • the anti-calcium unit determines a reduction in the level of the calcium in the running water, which has a substantially fixed percentage value
  • the level of hardness of the water at outlet depends on the level at inlet; this inlet level varies according to the source that feeds the mains water supply and, if the level of hardness is low, this causes an outlet hardness that can be lower than the minimum value that guarantees a correct functioning and prevents the disadvantages indicated above.
  • some washer machines provide a by-pass system, able to be selectively activated in a timed manner or governed by the detection of a specific value of hardness in the water.
  • the water fed from the mains water supply is divided into two fractions, one of which passes through the anti-calcium unit while the other is not made to transit through said anti-calcium unit.
  • the two fractions, one decalcified and the other not, are then mixed downstream of the anti-calcium unit before being sent to the washing chamber. In this way, the level of hardness in the water used for washing is prevented from going below a minimum limit, which can be pre-set and/or regulated.
  • the known solutions that provide this by-pass function therefore have three valves, a first loading valve connected to the mains water supply, a second valve for mixing the decalcified water and the hard water, and a third valve to activate the cycle to regenerate the resins.
  • Systems to mix hydraulic flows are known, for example from DE-A-10009293 , with two inlets and three outlets, which use only two valves and in which the third outlet is selected by means of the crossing of the two flows delivered simultaneously through the two inlets.
  • This known device is used, substantially in the form of a mixer, to feed three different chambers by means of only two inlets, in each of which detergent or a cleaning agent can be delivered.
  • this document does not provide for the crossed-flow distributor unit to assume a function of directing the flows of water, for example in order to condition the possible feed of water to the decalcifying system, or to the system to regenerate the relative filtering elements, or directly to the washing chamber.
  • Another purpose is to obtain this reduction in the number of valves adopting a solution that is simple and economic to construct.
  • a device for feeding water to a washer machine comprises a group of load valves connected to the main feed supply and having two valves that can be selectively and independently activated.
  • the two valves are associated downstream with respective pipes which connect to a crossed-flow distributor unit having two inlets and three outlets.
  • a first inlet of the crossed-flow distributor unit is connected to a first of said valves and is coordinated with a relative first outlet, while the second inlet is connected to the second of said valves and is coordinated with a relative second outlet.
  • Opening only one of said valves causes the relative flow of water to pass through the crossed-flow distributor unit without any diversions, thus heading for the outlet coordinated with the relative inlet.
  • the resultant flow is directed towards the third outlet, advantageously located in an intermediate position between the first and second outlet.
  • the crossed-flow distributor unit is used to distribute the flows of water, respectively and selectively, to the resin tank in order to decalcify said water, directly to the washing chamber in order to perform cycles with hard water, and to the salt tank in order to perform the regeneration cycle after a desired number of washing cycles.
  • the presence of the crossed-flow distributor unit allows to considerably simplify, both in structure and in functioning, the operations to direct the flows of water taken from the water network, alternately to the resin and the salt tanks or directly into the washing chamber. Thanks to this configuration with the crossed-flow distributor unit, only two valves are in fact enough to perform the functions of loading the washing water, mixing it with hard water and regenerating the resins.
  • a first outlet of the crossed-flow distributor unit can be suitably connected to the resin tank, in order to feed washing water to be subjected to decalcification before being sent to the washing chamber during a normal washing cycle.
  • a second outlet of the distributor unit can be connected directly to the washing chamber, in order to feed hard water without making it pass through the resin tank, and thus allow it to be mixed with the decalcified water, and consequently to maintain a desired minimum level of hardness in the washing water.
  • the third outlet which is involved when the two valves are simultaneously opened, is connected to the tank of the regeneration water, and allows to carry out the cycle to regenerate the resins when required.
  • a preferred solution of the invention provides that the water outlet that communicates directly with the washing chamber is made in a structure in which the crossed-flow distributor unit and at least the tank for the clean regeneration water are also made.
  • said structure is made from an element in a single body, for example made of plastic and obtained by molding.
  • said element has in a single body the connections for the resin and salt tanks, and also the pipes to convey the flows of water respectively to the resin and salt tanks.
  • the present invention therefore embodies a simple and economical solution which, with only two valves, allows to perform efficiently all the functions which, in conventional solutions in the state of the art, could only be obtained using three valves.
  • the number 10 denotes generally a device for feeding water to a washer machine such as a dishwasher or a glass-washer.
  • the anti-calcium unit 11 is schematically shown, comprising a first container 12 containing a saline solution 13 and a second container 14 containing ion exchange resins 15, a discharge pan 16 and a tank 17 containing clean water used for the cycle to regenerate the resins 15.
  • the feed device 10 comprises a crossed-flow distributor unit 18 with two inlets, respectively first 19a and second 19b, and three outlets, the first 20a coordinated with the first inlet 19a, the second 20b coordinated with the second inlet 19b and the third 20c disposed in an intermediate position between the first two.
  • a first feed pipe 21a governed by a first valve 22a, is connected to the first inlet 19a, while a second feed pipe 21b, governed by a second valve 22b, is connected to the second inlet 19b.
  • the two valves 22a, 22b are advantageously of the solenoid type, and can be activated separately and independently from each other.
  • the pipes 21a, 21b are connected through the respective valves 22a, 22b to the mains water supply.
  • the running water taken from the mains water supply is supplied by the pipe 30 to the first inlet 19a of the distributor unit 18 and sent to the coordinated first outlet 20a, in the direction of the arrow 23a.
  • the first outlet 20a is connected to the feed pipe 24 which, following the arrow 25, takes the running water to pass directly through the container 14 of the resins 15, bypassing the salt container 12, and then feeds decalcified water to the washing chamber for a normal washing cycle.
  • valve 22a When valve 22a is closed, and valve 22b is open, the running water is supplied, by the pipe 33, to the second inlet 19b of the distributor unit 18 and sent to the coordinated second outlet 20b, in the direction of the arrow 23b.
  • the second outlet 20b is associated with a baffle-plate 26 which sends the running water directly inside the washing chamber, in the case of fig. 3 through the aperture 37.
  • valves 22a, 22b are open, the relative flows collide and consequently the resultant flow transits through the third outlet 20c.
  • the third outlet 20c is connected to a pipe 27 which takes the water to the regeneration tank 17 and from there firstly through the container 12 of the salt 13 and then, by means of a non-return valve 35, through the container 14 of the resins 15.
  • the three functions are obtained, that is, of feeding decalcified washing water, of mixing it with hard water in order to maintain a minimum level of hardness in the water, and of activating the regeneration cycle when the washer machine requires it.
  • Fig. 2 shows one embodiment of a tank 17 for the clean regeneration water 28, conformed so as to incorporate inside it a crossed-flow distributor unit 18 of the type shown in fig. 1.
  • fig. 2 elements equal or equivalent to those present in fig. 1 have the same reference number.
  • the tank 17 is equipped with a first feed pipe 29, connected to the mains water supply which brings the running water through a channel 30 to the first inlet 19a of the distributor unit 18 and then to the coordinated outlet 20a. From this outlet 20a the water is made to pass through a channel 24, and then through an outlet pipe 31 to be sent for decalcification by passing through the tank 14 of resins 15 to be used in a normal washing cycle.
  • the tank 17 is also equipped with a second feed pipe 32, connected to the mains water supply, which takes the running water through a channel 33 to the second inlet 19b of the distributor unit 18, and then to the coordinated outlet 20b. From the outlet 20b, the water is diverted by the baffle-plate 26 directly to the washing chamber in order to mix the running water with the decalcified water.
  • first 29 and second 32 feed pipes have, or are associated respectively with the valves 22a, 22b shown in fig. 1.
  • Figs. 3-5 show an embodiment of a device 10 according to the invention which incorporates, substantially in a single block obtained by molding, the functions and components described heretofore.
  • the molded element incorporates the tank 17 for the clean regeneration water, the crossed-flow distributor unit 18 with relative inlets and outlets, the aperture 37 to introduce the hard water, that is, not decalcified, directly into the washing chamber, which can also function as a steam extractor, an additional air vent 38, a gooseneck choke 39 which prevents possible flow-back of the water into the feed pipes 30, 33, and also an auxiliary tank 40 that functions as an air trap.
  • the molded element also incorporates the rapid attachments for the connections of the salt tank 12 and the resin tank 14, and also the rapid connections 41 to attach the molded element to the walls of the inner structure of the dishwasher.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Domestic Plumbing Installations (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
EP06113866A 2005-05-13 2006-05-12 Verfahren und Vorrichtung zur Zuführung von Wasser in einer Waschmaschine Withdrawn EP1721558A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUD20050075 ITUD20050075A1 (it) 2005-05-13 2005-05-13 Dispositivo e metodo per l'alimentazione dell' acqua in una macchina di lavaggio

Publications (2)

Publication Number Publication Date
EP1721558A2 true EP1721558A2 (de) 2006-11-15
EP1721558A3 EP1721558A3 (de) 2008-12-24

Family

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Family Applications (1)

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EP06113866A Withdrawn EP1721558A3 (de) 2005-05-13 2006-05-12 Verfahren und Vorrichtung zur Zuführung von Wasser in einer Waschmaschine

Country Status (2)

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EP (1) EP1721558A3 (de)
IT (1) ITUD20050075A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102551447A (zh) * 2011-12-16 2012-07-11 四川大学 一种枕芯洗涤方法
WO2013017516A1 (en) * 2011-08-01 2013-02-07 Electrolux Home Products Corporation N.V. Laundry washing machine with a water softening device
WO2013017546A1 (en) * 2011-08-01 2013-02-07 Electrolux Home Products Corporation N.V. Laundry washing machine with a water softening device
US9637856B2 (en) 2011-08-01 2017-05-02 Electrolux Home Products N.V. Laundry washing machine
US9663892B2 (en) 2011-08-01 2017-05-30 Electrolux Home Products Corporation N.V. Laundry washing machine
WO2020234227A1 (en) * 2019-05-23 2020-11-26 BSH Hausgeräte GmbH Changeable water filter in combination with a mixing valve for pretreatment of water in a home appliance and method of pretreating water

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1628550B1 (de) * 1962-02-22 1970-09-24 Constructa Werke Gmbh Basenaustauschenthärter zur Spülwasserbehandlung bei Geschirrspülmaschinen
US3680703A (en) * 1971-03-26 1972-08-01 Nat Water Pure Corp Water-softening and regeneration process
EP0725182A1 (de) * 1995-02-03 1996-08-07 Bosch-Siemens HausgerÀ¤te GmbH Wasserzuführungs-Einrichtung für ein wasserführendes Haushaltgerät
DE10009293A1 (de) * 1999-07-26 2001-02-01 Aweco Appliance Sys Gmbh & Co Zulaufvorrichtung für wasserführende Einrichtungen
EP1452123A1 (de) * 2003-02-26 2004-09-01 Ab Electrolux Automatische Warenspülmaschine mit verbesserter Wasserzuführleitung
EP1600546A1 (de) * 2004-05-25 2005-11-30 Electrolux Home Products Corporation N.V. Waschmaschine mit Wasserabgabeeinrichtungen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1628550B1 (de) * 1962-02-22 1970-09-24 Constructa Werke Gmbh Basenaustauschenthärter zur Spülwasserbehandlung bei Geschirrspülmaschinen
US3680703A (en) * 1971-03-26 1972-08-01 Nat Water Pure Corp Water-softening and regeneration process
EP0725182A1 (de) * 1995-02-03 1996-08-07 Bosch-Siemens HausgerÀ¤te GmbH Wasserzuführungs-Einrichtung für ein wasserführendes Haushaltgerät
DE10009293A1 (de) * 1999-07-26 2001-02-01 Aweco Appliance Sys Gmbh & Co Zulaufvorrichtung für wasserführende Einrichtungen
EP1452123A1 (de) * 2003-02-26 2004-09-01 Ab Electrolux Automatische Warenspülmaschine mit verbesserter Wasserzuführleitung
EP1600546A1 (de) * 2004-05-25 2005-11-30 Electrolux Home Products Corporation N.V. Waschmaschine mit Wasserabgabeeinrichtungen

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013017516A1 (en) * 2011-08-01 2013-02-07 Electrolux Home Products Corporation N.V. Laundry washing machine with a water softening device
WO2013017546A1 (en) * 2011-08-01 2013-02-07 Electrolux Home Products Corporation N.V. Laundry washing machine with a water softening device
CN103732820A (zh) * 2011-08-01 2014-04-16 伊莱克斯家用产品股份有限公司 具有水软化装置的衣物洗涤机
US9637856B2 (en) 2011-08-01 2017-05-02 Electrolux Home Products N.V. Laundry washing machine
US9663892B2 (en) 2011-08-01 2017-05-30 Electrolux Home Products Corporation N.V. Laundry washing machine
US9790635B2 (en) 2011-08-01 2017-10-17 Electrolux Home Products Corporation N.V. Laundry washing machine with a water softening device
US9790636B2 (en) 2011-08-01 2017-10-17 Electrolux Home Products Corporation N.V. Laundry washing machine with a water softening device
US10385500B2 (en) 2011-08-01 2019-08-20 Electrolux Home Products Corporation N.V. Laundry washing machine with a water softening device
CN102551447A (zh) * 2011-12-16 2012-07-11 四川大学 一种枕芯洗涤方法
WO2020234227A1 (en) * 2019-05-23 2020-11-26 BSH Hausgeräte GmbH Changeable water filter in combination with a mixing valve for pretreatment of water in a home appliance and method of pretreating water
US11485647B2 (en) 2019-05-23 2022-11-01 Bsh Home Appliances Corporation Changeable water filter in combination with a mixing valve for pretreatment of water in a home appliance and method of pretreating water

Also Published As

Publication number Publication date
ITUD20050075A1 (it) 2006-11-14
EP1721558A3 (de) 2008-12-24

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