EP0749720B1 - Regenerationsverfahren einer Wasserenthärtungsanlage für eine Wasch-oder Geschirrspülmaschine - Google Patents

Regenerationsverfahren einer Wasserenthärtungsanlage für eine Wasch-oder Geschirrspülmaschine Download PDF

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Publication number
EP0749720B1
EP0749720B1 EP96109227A EP96109227A EP0749720B1 EP 0749720 B1 EP0749720 B1 EP 0749720B1 EP 96109227 A EP96109227 A EP 96109227A EP 96109227 A EP96109227 A EP 96109227A EP 0749720 B1 EP0749720 B1 EP 0749720B1
Authority
EP
European Patent Office
Prior art keywords
water
container
saline solution
regeneration
valve
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
Application number
EP96109227A
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English (en)
French (fr)
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EP0749720A1 (de
Inventor
Karl-Heinz Müller
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 Europe BV
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Whirlpool Europe BV
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Publication date
Application filed by Whirlpool Europe BV filed Critical Whirlpool Europe BV
Publication of EP0749720A1 publication Critical patent/EP0749720A1/de
Application granted granted Critical
Publication of EP0749720B1 publication Critical patent/EP0749720B1/de
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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
    • 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

Definitions

  • the invention relates to a method of regenerating a water-softening installation for an automatic washing machine or dishwasher, which has a wash or rinse container connected to a water container which is filled with active resin and into which fresh water can be led for softening in intake phases via a software-driven intake valve, a storage container and a water supply pipe and into which saline solution for regenerating the resin can be led from a saline solution container by means of a software-driven regeneration valve, a non-return valve being connected after the regeneration valve between the storage container and the saline solution container, said regeneration valve being permeable only in the direction towards the water softener and connected on the outlet side with the entrance of the water softener and of a water supply pipe connected electrically to it and taken from the storage container, the outlet of the storage container being arranged above the saline solution container and the water softener in such a way that, when the intake valve is open, fresh water can only be led into the water softener via the water supply pipe when the storage container
  • An automatic washing machine with a regeneration phase of this kind is known from EP 0 496 957 B1.
  • a pre-measured amount of saline solution is led from the saline solution container into the water softener.
  • an additional amount of fresh water is led into the water softener.
  • the water softener has a total inner area that is as big as the volume of the resin poured into it, plus some free space.
  • the sum of the measured saline solution and of the above-mentioned additional amount of fresh water must be substantially as big as the total free space in the water softener, so that in the water softener the process of regeneration is improved by a kind of stirring or mixing effect.
  • in regeneration consideration should be given to the variable degree of hardness of the fresh water used. It is not easy to optimize regeneration in this way.
  • the washing machine according to DE 37 10 511 A1 has a water-softening installation of a similar structure. However, in this, too, the stirring and mixing effect during the regeneration phase is not optimal.
  • the object of the invention is to design a method of the kind mentioned initially in such a way that the regeneration process is optimized during the regeneration phase in a simple fashion.
  • This object is achieved according to the invention in that the regeneration valve is opened in the regeneration phase and thus a common water level is set in the storage container, in the saline solution container, in the connecting pipe and the water softener up to the wash or rinse container, which level lies above the upper water level of the saline solution container and the water softener, and in that an air-pressure pulse is created in the water supply pipe by opening the intake valve for a short time in the regeneration phase.
  • the saline solution is led from its container into the water softener and the fresh water stored in the storage container can be pre-measured and adapted optimally to the degree of hardness of the fresh water used.
  • an air-pressure pulse is created in the water supply pipe and this pulse can extend through the water softener up to the wash or rinse container. By means of the air-pressure pulse, a stirring and eddy effect is created so that the saline solution led in reaches the reaction zone of the resin more effectively.
  • the portion of the saline solution standing in the lower region of the water softener is forced upwards by the air-pressure pulse, so that a kind of exchange of the saline solution takes place and said saline solution participates more effectively in regeneration without changing, through the addition of extra fresh water, the concentration of the saline solution which is, of course, adjusted to the degree of hardness of the fresh water used.
  • Regeneration can easily be further improved by creating, in the regeneration phase, after the regeneration valve has been closed, a plurality of air-pressure pulses in the water-supply pipe by repeatedly opening the intake valve briefly.
  • the air-pressure pulses each time force the portion of the saline solution in the water softener upwards and cause repeated exchange.
  • the fresh water source can be decoupled quite simply from the water-softening installation by the storage container being connected with the exit of the intake valve via a free air gap and by the in-flow into the storage container being arranged above the outgoing water supply pipe in the upper region of the storage container.
  • the intake of fresh water into the water-softening installation is released and stopped via an intake valve 1, controlled by a program control unit 8.
  • the intake valve 1 is connected, via a free air gap 3, with the storage container 2, which has a capacity e.g. of 300 cm 3 and is connected with the entrance of the water softener 16 via the water supply pipe 4 arranged in the upper region.
  • the storage container 2 which has a capacity e.g. of 300 cm 3 and is connected with the entrance of the water softener 16 via the water supply pipe 4 arranged in the upper region.
  • a quantity of active resin 17 is accommodated between a lower membrane 21 and an upper membrane 22.
  • the water supply pipe 4 leads from the water softener 16 on to the wash container 10.
  • the outlet arranged in the lower region of the storage container 2 leads via a connecting pipe 5 and a regeneration valve 14, controlled by a program control unit 8, to the entrance of a saline solution container 7, which is filled with salt.
  • the exit of the saline solution container 7 leads via a non-return valve 20 to the entrance of the water softener 16, to which the water supply pipe 4 is also joined.
  • the non-return valve 20 is only permeable in the direction from the saline solution container 7 to the water softener 16.
  • the intake valve 1 and the regeneration valve 14 are closed.
  • the storage container 2 is partly filled. If the intake valve 1 is then opened, the storage container 2 is then filled with the regeneration volume of fresh water, i.e. with approximately 300 cm 3 . Once this has happened, the fresh water flows via the water supply pipe 4 into the water softener 16 and is softened in it, because the resin binds the hardness components of the fresh water. The soft water then flows from the water softener 16 into the wash container 10, where it is used for rinsing and/or washing processes.
  • the intake valve 1 and the regeneration valve 14 are closed.
  • the storage container 2 is filled and there is also saline solution in the saline solution container 7.
  • the resin has bound the hardness components.
  • the regeneration valve 14 is opened. From the storage container 2 the pre-measured regeneration volume of fresh water flows into the saline solution container 7 (pressure from geodetic level).
  • the non-return valve 20 opens and saline solution flows into the water softener 16.
  • the general water level 6 is thereby set, extending uniformly through the connecting pipe 5 between the storage container 2 and the saline solution container 7, through the saline solution container 7, the water supply pipe 4, the water softener 16 and the lower region of the wash container 10.
  • the hardness components are released by the saline solution and the resin 17 is regenerated.
  • the volume 23 of saline solution standing in the water supply pipe 4 does not come into contact with the resin and remains unused.
  • the regeneration valve 14 is closed and the intake valve 1 is opened briefly.
  • fresh water is discharged briefly into the storage container 2.
  • the volume of water discharged is, however, smaller than the capacity of the storage container 2, so water cannot reach the water softener 16.
  • the regeneration process is supported and optimized by these air-pressure pulses created in the second part of the regeneration phase, without diluting the concentration of the saline solution.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Water By Ion Exchange (AREA)

Claims (2)

  1. Verfahren zur Wiederaufbereitung einer Wasserenthärtungseinrichtung für eine automatische Waschmaschine oder einen automatischen Geschirrspüler, bei der bzw. dem ein Wasch- oder Spülbehälter mit einem Wasserbehälter verbunden ist, der mit aktivem Harz gefüllt ist und in den Frischwasser zur Enthärtung in Einfüllphasen über ein softwarebetriebenes Einlaßventil, einen Speicherbehälter und eine Wasserzuführungsleitung eingeleitet werden kann und in den eine Salzlösung zur Wiederaufbereitung des Harzes von einem Salzlösungsbehälter mittels eines softwarebetriebenen Wiederaufbereitungsventils eingeleitet werden kann, wobei ein Rückschlagventil hinter dem Wiederaufbereitungsventil zwischen dem Speicherbehälter und dem Salzlösungsbehälter liegt, das Wiederaufbereitungsventil nur in Richtung des Wasserenthärtungsgeräts durchlässig ist, das Wiederaufbereitungsventil auf der Ausgangsseite mit dem Eingang des Enthärtungsgeräts und einer mit diesem elektrisch verbundenen und vom Speicherbehälter kommenden Wasserzuführungsleitung verbunden ist und der Ausgang des Speicherbehälters über dem Salzlösungsbehälter und dem Wasserenthärtungsgerät in derartiger Weise angeordnet ist, daß Frischwasser bei offenem Einlaßventil nur über die Wasserzuführungsleitung in das Wasserenthärtungsgerät eingeleitet werden kann, wenn der Speicherbehälter voll ist,
    dadurch gekennzeichnet,
    dass das Wiederaufbereitungsventil (14) in der Wiederaufbereitungsphase geöffnet wird und damit ein gemeinsamer Wasserstand (6) im Speicherbehälter (2), im Salzlösungsbehälter (7), in der Verbindungsleitung (5) und im Wasserenthärtungsgerät (16) bis zum Wasch- oder Spülbehälter (10) geschaffen wird, wobei der Wasserstand über dem oberen Wasserstand der Salzlösungsbehälters (7) und des Wasserenthärtungsgeräts (16) liegt, und
    dass ein Luftdruckimpuls in der Wasserzuführungsleitung (4) durch Öffnen des Einlaßventils (1) für eine kurze Zeit während der Wiederaufbereitungsphase erzeugt wird.
  2. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass in der Wiederaufbereitungsphase nach dem Schließen des Wiederaufbereitungsventils (14) eine Vielzahl von Luftdruckimpulsen in der Wasserzuführungsleitung (4) durch wiederholtes, kurzes Öffnen des Einlaßventils (1) erzeugt wird.
EP96109227A 1995-06-19 1996-06-08 Regenerationsverfahren einer Wasserenthärtungsanlage für eine Wasch-oder Geschirrspülmaschine Expired - Lifetime EP0749720B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19522140A DE19522140C3 (de) 1995-06-19 1995-06-19 Verfahren zum Regenerieren einer Wasserenthärtungsanlage für einen Wasch- oder Geschirrspülautomaten
DE19522140 1995-06-19

Publications (2)

Publication Number Publication Date
EP0749720A1 EP0749720A1 (de) 1996-12-27
EP0749720B1 true EP0749720B1 (de) 2000-01-19

Family

ID=7764657

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Application Number Title Priority Date Filing Date
EP96109227A Expired - Lifetime EP0749720B1 (de) 1995-06-19 1996-06-08 Regenerationsverfahren einer Wasserenthärtungsanlage für eine Wasch-oder Geschirrspülmaschine

Country Status (2)

Country Link
EP (1) EP0749720B1 (de)
DE (2) DE19522140C3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107531514A (zh) * 2015-05-08 2018-01-02 陶氏环球技术有限责任公司 吸附树脂颗粒的使用方法

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* Cited by examiner, † Cited by third party
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DE10244243A1 (de) * 2002-09-24 2004-03-25 Aweco Appliance Systems Gmbh & Co. Kg Haushaltsmaschine
DE102004019330A1 (de) * 2003-12-22 2005-07-21 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit einem System zur Wasserenthärtung
ITVE20050005A1 (it) 2005-01-27 2006-07-28 Elektra S R L Procedimento di controllo e gestione del flusso di acqua ad una macchina da caffe' provvista di dispositivo addolcitore a resine a scambio ionico e macchina da caffe' per attuare il procedimentoo.
GB0511943D0 (en) 2005-06-13 2005-07-20 Reckitt Benckiser Uk Ltd Device
PL3090085T3 (pl) 2013-12-30 2022-10-31 Electrolux Appliances Aktiebolag Pralka do prania z systemem zmiękczania wody oraz sposób sterowania pralką do prania
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
CN105849333B (zh) * 2013-12-30 2018-09-18 伊莱克斯家用电器股份公司 洗衣机和用于控制洗衣机的方法
CN110693431B (zh) * 2018-07-09 2023-04-18 青岛海尔洗碗机有限公司 一种洗碗机的软化装置、控制方法及洗碗机
CN110693433B (zh) * 2018-07-09 2023-04-18 青岛海尔洗碗机有限公司 一种洗碗机的软化装置、控制方法及洗碗机
CN110693432B (zh) * 2018-07-09 2023-04-18 青岛海尔洗碗机有限公司 一种洗碗机的软化装置、控制方法及洗碗机
IT202100003668A1 (it) * 2021-02-17 2022-08-17 Bitron Spa Sistema di alimentazione e trattamento dell’acqua per elettrodomestici atto ad operare a pressione atmosferica e relativo elettrodomestico.

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GB1119796A (en) * 1964-07-29 1968-07-10 Philips Nv Improvements in or relating to ion-exchanger water-softener apparatus
DE2947483C2 (de) * 1979-11-24 1983-12-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Enthärtungseinrichtung, insbesondere für Geschirrspülmaschinen
DE3028179A1 (de) * 1980-07-25 1982-02-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren und vorrichtung zum kondensieren des wasserdampfes im spuelbehaelter einer geschirrspuelmaschine
IT8134057V0 (it) * 1981-12-14 1981-12-14 Zanussi A Spa Industrie Lavatrice automatica con circuito idraulico di alimentazione perfezionato.
IT1187299B (it) * 1985-09-26 1987-12-23 Zanussi Elettrodomestici Lavastoviglie con addolcitore d'acqua e dispositivo di rigenerazione dello stesso
DE3710511C2 (de) * 1987-03-30 1995-12-21 Bauknecht Hausgeraete Einrichtung zum Regeln der Salzmengenzufuhr beim Regenerieren von Wasserenthärtungsanlagen, insbesondere für Geschirrspüler
IT1250374B (it) * 1991-01-23 1995-04-07 Zanussi Elettrodomestici Metodo per la rigenerazione di un addolcitore d'acqua in una macchina lavatrice
DE4131791C1 (en) * 1991-09-24 1993-02-04 Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen, De Method for operating dishwasher - uses programmable water softening ion exchanger and regenerating water storage container
DE4216292A1 (de) * 1992-05-16 1993-11-18 Aweco Kunststofftech Geraete Wasserenthärter für Haushalts-Geschirrspülmaschinen
DE4422143A1 (de) * 1994-06-28 1996-01-04 Aweco Kunststofftech Geraete Verfahren zum Betrieb eines Wasserenthärters, insbesondere für Haushaltsmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107531514A (zh) * 2015-05-08 2018-01-02 陶氏环球技术有限责任公司 吸附树脂颗粒的使用方法

Also Published As

Publication number Publication date
DE19522140A1 (de) 1997-01-02
EP0749720A1 (de) 1996-12-27
DE69606230D1 (de) 2000-02-24
DE69606230T2 (de) 2000-07-13
DE19522140C2 (de) 1998-08-13
DE19522140C3 (de) 2000-06-15

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