EP0425815A2 - Verbesserte Waschwaschine - Google Patents

Verbesserte Waschwaschine Download PDF

Info

Publication number
EP0425815A2
EP0425815A2 EP90118538A EP90118538A EP0425815A2 EP 0425815 A2 EP0425815 A2 EP 0425815A2 EP 90118538 A EP90118538 A EP 90118538A EP 90118538 A EP90118538 A EP 90118538A EP 0425815 A2 EP0425815 A2 EP 0425815A2
Authority
EP
European Patent Office
Prior art keywords
water
hardness
washing
washing machine
machine
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.)
Granted
Application number
EP90118538A
Other languages
English (en)
French (fr)
Other versions
EP0425815B1 (de
EP0425815A3 (en
Inventor
Giuseppe Lattanzi
Sandro Verdini
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
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 Merloni Elettrodomestici SpA filed Critical Merloni Elettrodomestici SpA
Publication of EP0425815A2 publication Critical patent/EP0425815A2/de
Publication of EP0425815A3 publication Critical patent/EP0425815A3/en
Application granted granted Critical
Publication of EP0425815B1 publication Critical patent/EP0425815B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/007—Arrangements of water softeners
    • 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

Definitions

  • the present invention refers to a washing machine, particularly a domestic laundry- or dish-washer, comprising means which reduces the hardness of the water supplied to the machine and at least a hardness sensor device for said water.
  • the quantity of detergent to use in a given type of washing directly depends on the hardness of the water which is used for the washing itself. In fact, if the detergent quantity is insufficient, the calcium (Ca++) and magnesium (Mg++) ions, responsible for the water hardness, neutralize the surface-active part of the detergent, which has the principal function in the washing action, so that the washing results to be unsatisfactory.
  • washing machines In order to act on the water hardness, reducing it to medium levels and not to oblige the user to change the detergent dosages, some washing machines use specific artifices; particularly, dishwashers have a softening device for the washing and rinsing water, which exchanges the Ca++ and Mg++ ions of the water with the sodium (Na+) ions contained in appropriate resins arranged into the softnening device, and not impairing the action of the detergent or the aspect of the washed items.
  • Some laundry machines use an agent, which is usually contained in the detergent, which can reduce the water hardness and which operates according to its concentration during the use.
  • the resin loses its Na+ ions, to be exchanged with Ca++ and Mg++ ions of the water, and in this way the water, even passing through the resin, will maintain substantially the same hardness it had at the entry.
  • resin regeneration introducing a salt (NaCl) solution with the purpose of washing the resin.
  • This phase is generally done at every washing cycle, with a great consumption of salt, which has to be often refilled by the user; only some machines provide for the possibility of total or partial exclusion of the resin regeneration.
  • the subject of the present invention is a washing machine, particularly a domestic laundry- or dish-washer, comprising means which reduces the hardness of the water supplied to the machine and at least a hardness sensor device for said water, characterized in that there are provided control means which, at least during a washing cycle, activate the means which reduces the water hardness in function of the result of the measuring effected by the sensor device.
  • a dishwashing machine showing the supply hydraulic system for the washing; it comprises a connection to the water mains 1 which supplies the running water to a softener 2.
  • the resin in the softener 2 exchanges its Na+ ions with the Ca++ and Mg++ ions of the water.
  • the softened water is analysed by a sensor 3 , of known type, which verifies the good operation of said softener 2.
  • the results obtained from the analisys are then collected by a programmer (timer) 4 which can transform them into signals recognizable by the user or by the machine itself.
  • these signals allow, the user to verify istantaneously the hardness of the softened water, necessary for the washing and/or the rinse of the dishes; in this way it will be possible to do the ions regenerating phase only when these ones have lost their exchange capability, and not during any cycle.
  • the water hardness levels detected insstantaneously and which correspond to the resin consumption, are memorized and integrated by means of digital or analogic means, and if a predetermined threshold is exceeded, the latter informs the programmer in order to to enable the regeneration.
  • the water analysed in this way is then supplied to the washing tank 5 by means of the hydraulic pump 6 which conveys it to the rotating collectors 7.
  • Figure 2 shows a variant of the dishwashing machine of figure 1, where said sensor 3, measuring the water hardness, is arranged upstream the softener 2, in respect of the direction of the water flow.
  • the timer or the user have the possibility to know how much the resin is used, and to operate a regeneration with the quantity of solution strictly necessary to restore the resin to the initial conditions.
  • the information of the analysis is collected by the programmer 4 which, by means of automatic means or signallers recognizable by the user, commands the execution of the regeneration.
  • Figure 3 shows a further variant of the figures 1 and 2; it consists in the use of two sensors 3a and 3b or, in alternative, only a sensor which performs two analysis of the water, respectively upstream and downstream the softener. In this way it is possible to control completely the operating condition of the resin, and to realize an optimal regeneration.
  • the hardness of the water supplied from the mains is analysed by means of the sensor 3a, and the water treated by the resin is analized by means of the sensor 3b, so having istantaneously, on the basis of these results, the value of the correct operation of the softener.
  • the operation of the softening device is optimized, with the consequent reduction of the consumption of the salt (NaCl) used to obtain the necessary solution for the regenerating phase; a lesser pollution is obtained because a salt which is not completely used is never discharged, like it happens in the case of the known machines; the user can refill the salt container of the softener with intervals longer than in the known embodiments; the regeneration of the resin is done automatically, after a control of the information supplied by the sensors, which inform the timer about the exceeding of a hardness threshold.
  • the salt NaCl
  • the water hardness sensor which analyses the water during each supplying of the machine, measures its hardness, which can change depending on the season and the weather conditions, and for this reason it conditions the machine operation so to optimize it; this fact is not possible with the devices controlled by a machine or by an user which do not know istantaneously the hardness of the water used for the washing and/or the rinsing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
EP90118538A 1989-09-29 1990-09-27 Verbesserte Waschwaschine Expired - Lifetime EP0425815B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8967819A IT1232595B (it) 1989-09-29 1989-09-29 Macchina di lavaggio perfezionata
IT6781989 1989-09-29

Publications (3)

Publication Number Publication Date
EP0425815A2 true EP0425815A2 (de) 1991-05-08
EP0425815A3 EP0425815A3 (en) 1991-09-04
EP0425815B1 EP0425815B1 (de) 1994-08-31

Family

ID=11305524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90118538A Expired - Lifetime EP0425815B1 (de) 1989-09-29 1990-09-27 Verbesserte Waschwaschine

Country Status (4)

Country Link
EP (1) EP0425815B1 (de)
DE (1) DE69012045T2 (de)
ES (1) ES2058716T3 (de)
IT (1) IT1232595B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262541A (en) * 1991-12-20 1993-06-23 Bosch Siemans Hausgeraete Gmbh Water hardness indicating in an appliance operating with water
GR1001227B (el) * 1992-04-20 1993-06-30 Dimitrios Pachopoulos Νεου τυπου πλυντηριο πιατων υψηλης αισθητικης και λειτουργικοτητας.
EP0741990A2 (de) * 1995-05-09 1996-11-13 Merloni Elettrodomestici S.p.A. Salzkonzentrationsanzeigevorrichtung zur Harzregeneration in einer Waschmaschine
EP0741991A1 (de) * 1995-05-09 1996-11-13 Merloni Elettrodomestici S.p.A. Regenerierungsvorrichtung für eine Geschirrspülmaschine mit Wasserenthärtungseinrichtung
GB2321588A (en) * 1997-01-30 1998-08-05 Ferex Ltd Water softener control for washing machine
EP0966914A2 (de) * 1998-06-10 1999-12-29 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und wasserführendes Haushaltsgerät zur Wasserenthärtung
GB2386381A (en) * 2002-03-14 2003-09-17 Darren Keats Water softener for a washing machine
WO2004058034A1 (de) * 2002-12-20 2004-07-15 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
EP1582135A1 (de) * 2004-03-30 2005-10-05 BITRON S.p.A. Vorrichtung zur Kontrolle der Wasserhärte bei einer Waschmaschine oder einer Geschirrspülmaschine
WO2006081878A1 (de) * 2005-02-03 2006-08-10 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes haushaltgerät
WO2011042341A1 (en) 2009-10-09 2011-04-14 Arcelik Anonim Sirketi A washing machine comprising a water softener unit
US8001811B2 (en) * 2007-05-16 2011-08-23 Samsung Electronics Co., Ltd Washing machine having water softening device
DE102013206359A1 (de) 2013-04-11 2014-10-16 Henkel Ag & Co. Kgaa Verfahren zum Waschen von Textilien
US20160326681A1 (en) * 2013-12-30 2016-11-10 Electrolux Appliances Aktiebolag Laundry Washing Machine with Water Softening System and Method for Controlling a Laundry Washing Machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29611091U1 (de) * 1996-06-25 1997-10-23 Aeg Hausgeraete Gmbh Flüssigkeitsführendes Hausgerät mit einer Programmsteuerung
DE102011081703B4 (de) * 2011-08-29 2017-05-24 BSH Hausgeräte GmbH Verfahren zum Betrieb eines Haushaltsgerätes mit einem Durchlauferhitzer und Haushaltsgerät mit Durchlauferhitzer
DE102012212638C5 (de) 2012-07-18 2020-07-30 Premark Feg L.L.C. Spülmaschine sowie Verfahren zum Betreiben einer Spülmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1816452A1 (de) * 1968-12-21 1970-08-13 Bosch Hausgeraete Gmbh Geschirrspuelmaschine
DE1950224A1 (de) * 1969-10-04 1971-04-15 Miele & Cie UEberwachungseinrichtung bei Waschoder Geschirrspuelmaschinen-Enthaerter
DE1642488A1 (de) * 1967-04-08 1971-05-06 Miele & Cie Wasch- oder Geschirrspuelmaschine mit einer Einrichtung zur UEberwachung des Enthaerters
DE3527047A1 (de) * 1985-07-27 1987-02-05 Licentia Gmbh Programmgesteuerte wasch- oder geschirrspuelmaschine
DE3533098A1 (de) * 1985-09-17 1987-03-19 Holzer Walter Vorrichtung zum enthaerten von wasser
DE3810649A1 (de) * 1988-03-29 1989-10-19 Licentia Gmbh Verfahren zur dosierung von wasserenthaertungsmitteln in waschmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1642488A1 (de) * 1967-04-08 1971-05-06 Miele & Cie Wasch- oder Geschirrspuelmaschine mit einer Einrichtung zur UEberwachung des Enthaerters
DE1816452A1 (de) * 1968-12-21 1970-08-13 Bosch Hausgeraete Gmbh Geschirrspuelmaschine
DE1950224A1 (de) * 1969-10-04 1971-04-15 Miele & Cie UEberwachungseinrichtung bei Waschoder Geschirrspuelmaschinen-Enthaerter
DE3527047A1 (de) * 1985-07-27 1987-02-05 Licentia Gmbh Programmgesteuerte wasch- oder geschirrspuelmaschine
DE3533098A1 (de) * 1985-09-17 1987-03-19 Holzer Walter Vorrichtung zum enthaerten von wasser
DE3810649A1 (de) * 1988-03-29 1989-10-19 Licentia Gmbh Verfahren zur dosierung von wasserenthaertungsmitteln in waschmaschinen

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262541A (en) * 1991-12-20 1993-06-23 Bosch Siemans Hausgeraete Gmbh Water hardness indicating in an appliance operating with water
GB2262541B (en) * 1991-12-20 1995-09-13 Bosch Siemans Hausgeraete Gmbh Water hardness indication in an appliance operating with water
GR1001227B (el) * 1992-04-20 1993-06-30 Dimitrios Pachopoulos Νεου τυπου πλυντηριο πιατων υψηλης αισθητικης και λειτουργικοτητας.
EP0741990A2 (de) * 1995-05-09 1996-11-13 Merloni Elettrodomestici S.p.A. Salzkonzentrationsanzeigevorrichtung zur Harzregeneration in einer Waschmaschine
EP0741991A1 (de) * 1995-05-09 1996-11-13 Merloni Elettrodomestici S.p.A. Regenerierungsvorrichtung für eine Geschirrspülmaschine mit Wasserenthärtungseinrichtung
EP0741990A3 (de) * 1995-05-09 1997-01-08 Merloni Elettrodomestici Spa Salzkonzentrationsanzeigevorrichtung zur Harzregeneration in einer Waschmaschine
GB2321588A (en) * 1997-01-30 1998-08-05 Ferex Ltd Water softener control for washing machine
GB2321588B (en) * 1997-01-30 2000-11-15 Ferex Ltd A washing machine
EP0966914A3 (de) * 1998-06-10 2000-04-05 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und wasserführendes Haushaltsgerät zur Wasserenthärtung
EP0966914A2 (de) * 1998-06-10 1999-12-29 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und wasserführendes Haushaltsgerät zur Wasserenthärtung
GB2386381A (en) * 2002-03-14 2003-09-17 Darren Keats Water softener for a washing machine
WO2004058034A1 (de) * 2002-12-20 2004-07-15 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
EP1582135A1 (de) * 2004-03-30 2005-10-05 BITRON S.p.A. Vorrichtung zur Kontrolle der Wasserhärte bei einer Waschmaschine oder einer Geschirrspülmaschine
WO2006081878A1 (de) * 2005-02-03 2006-08-10 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes haushaltgerät
US8001811B2 (en) * 2007-05-16 2011-08-23 Samsung Electronics Co., Ltd Washing machine having water softening device
WO2011042341A1 (en) 2009-10-09 2011-04-14 Arcelik Anonim Sirketi A washing machine comprising a water softener unit
DE102013206359A1 (de) 2013-04-11 2014-10-16 Henkel Ag & Co. Kgaa Verfahren zum Waschen von Textilien
US20160326681A1 (en) * 2013-12-30 2016-11-10 Electrolux Appliances Aktiebolag Laundry Washing Machine with Water Softening System and Method for Controlling a Laundry Washing Machine
US11180887B2 (en) * 2013-12-30 2021-11-23 Electrolux Appliances Aktiebolag Laundry washing machine with water softening system and method for controlling a laundry washing machine

Also Published As

Publication number Publication date
ES2058716T3 (es) 1994-11-01
IT8967819A0 (it) 1989-09-29
DE69012045D1 (de) 1994-10-06
DE69012045T2 (de) 1995-01-26
IT1232595B (it) 1992-02-26
EP0425815B1 (de) 1994-08-31
EP0425815A3 (en) 1991-09-04

Similar Documents

Publication Publication Date Title
EP0425815B1 (de) Verbesserte Waschwaschine
CN104233700A (zh) 一种洗衣机控制方法及洗衣机
US10400378B2 (en) Method for operating a laundry washing machine and laundry washing machine
EP3237664B1 (de) Verfahren zum waschen von wäsche in einer wäschewaschmaschine mit automatischer dosiervorrichtung sowie wäschewaschmaschine
EP0669097A3 (de) Waschmaschine mit Einrichtung zur Wasserrückgewinnung
EP2993262B1 (de) Verfahren zum Waschen von Wäsche in einer Wäschewaschmaschine
US5803985A (en) Water fill sensing for a dishwasher
WO2011042341A1 (en) A washing machine comprising a water softener unit
EP3494860A1 (de) Steuerungssystem für ein haushaltsgerät, wasserbehandlungssystem gesteuert durch das system und programm und verfahren
US5259219A (en) Sensor holder for a machine for cleansing articles
EP0094357B1 (de) Waschmaschine und Verfahren zum Regenerieren der Austauschermasse
US3680703A (en) Water-softening and regeneration process
US5409023A (en) Dishwashing machine with water fill control
CN110438728A (zh) 一种洗衣机的控制方法及洗衣机
CN108085927B (zh) 一种洗衣机的筒的清洗控制方法及洗衣机
EP1008324A1 (de) Verfahren zum Reinigen von Geschirr in einer Geschirrspülmaschine
ATE329523T1 (de) Vorrichtung und verfahren zum kontrollieren der wasserhärte einer waschmaschine
ITPN970061A1 (it) Procedimento per recuperare acqua contenente brillantante in una lavastoviglie automatica
US3530691A (en) Automatic washing machine with water-softening means
WO2015036040A1 (en) Determining operational states of a dishwasher
JPH0338876B2 (de)
JPH0543395B2 (de)
JPS6247559B2 (de)
WO2004096006A2 (en) Improved wash method, and dishwashing machine implementing such a method
GB2386381A (en) Water softener for a washing machine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB

17P Request for examination filed

Effective date: 19920305

17Q First examination report despatched

Effective date: 19931011

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB

REF Corresponds to:

Ref document number: 69012045

Country of ref document: DE

Date of ref document: 19941006

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2058716

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20080923

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080930

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090925

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100401

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20100926

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20100926

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20110228

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20091006

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090928