EP0435119A1 - Improvements to the water softening system in a washing machine - Google Patents

Improvements to the water softening system in a washing machine Download PDF

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Publication number
EP0435119A1
EP0435119A1 EP90124313A EP90124313A EP0435119A1 EP 0435119 A1 EP0435119 A1 EP 0435119A1 EP 90124313 A EP90124313 A EP 90124313A EP 90124313 A EP90124313 A EP 90124313A EP 0435119 A1 EP0435119 A1 EP 0435119A1
Authority
EP
European Patent Office
Prior art keywords
water
resins
washing machine
softening system
vessel
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Withdrawn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
EP90124313A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dino Bongini
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 EP0435119A1 publication Critical patent/EP0435119A1/en
Withdrawn legal-status Critical Current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

Definitions

  • the present invention refers to a water softening system in a washing machine, particularly a dishwasher for domestic use, comprising a vessel far ions exchange resins.
  • Object of the present invention is to indicate a softening system which allows to obtain a longer life of the resins between two regenerating processes, so as to reduce the consumption of the required salt.
  • the subject of the present invention is a water softening system in a washing machine, particularly a dishwasher for domestic use, comprising a vessel for ions exchange resins, characterized in that the water to be softened is passed through the resins practically only when it is intended to be used at a temperature higher than a prefixed value.
  • figure 1 shows schematically the hydraulic circuit of a dishwasher
  • figure 2 shows schematically a resins vessel according to an embodiment of the invention.
  • reference number 1 indicates a complex device which carries out several functions.
  • Such device receives the supply water through the pipe 3 (connected to the supply mains), a valve 2 and the inlet connector 4.
  • Connector 5 conveys water to the resins vessel 7; connector 6 conveys the water collected in the volumetric cavity to salt vessel 8.
  • Resins vessel 7 is connected with the washing tank 9; this is in turn connected, by means of three connectors, to the lower spraying arm 12, to the upper one 11 and to the drain 10.
  • an interception device for instance an electric valve or a linear motor or a pneumatic actuator, which, commanded by the timer of the machine, allows the water to pass from the "air break" to the connector 5 only when the water is intended to be used at a temperature at least equal to a prefixed value, for example 60°C.
  • interception device 15 commands the closure of the pipe conveying to connector 5, and creates a reflux; this reflux obliges the water taken from the mains, once the air-break has been passed, to fall in the bottom of device 1 and, from this point, through hole 13, to pass directly to the tank.
  • the invention has the purpose to save the resins, by passing water through them only when the water to be used must be sufficiently heated.
  • the passage of water in the resins can be anticipated at the end of the cycle preceding those during which water is heated, so as to bring the resins into activity and win their initial idleness: in this way they will be active at the beginning of the passage of the water to be heated.
  • FIG. 2 A second embodiment of the invention will be now described with reference to figure 2, wherein there is schematically represented a vessel for the resins, according to the invention.
  • the cylindric vessel 7 has a first lower inlet 18 and a second upper inlet 16, besides an exit 17.
  • Water entering through inlet 18 is forced to Pass through all the resins, in order to exit by the outlet connector 17; on the contrary, water entering by upper inlet 16 exits directly, practically without passing through the resins.
  • the cylindric container 7 could be realized as described in the countertop patent application no. 67822-A/89, in the name of the same Applicant. In this way, the difference of effect of the water passage through the resins, in the case of entry of water through lower inlet 18 or through upper inlet 16, is even more remarkable.
  • a preferred solution in this case may foresee that the section of the by-pass pipe is of such a diameter that it grants a water flow higher than the pipe passing through the resins.
  • a simple stop electric valve, arranged in the by-pass path which conveys water directly in the tank will be sufficient to convey all the arriving water to the resins vessel (electric valve closed) in the case of hot washings and will be also able to convey the water to the tank (electric valve open), when necessary, because of the larger diameter of the by-pass pipe.

Landscapes

  • Treatment Of Water By Ion Exchange (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP90124313A 1989-12-22 1990-12-15 Improvements to the water softening system in a washing machine Withdrawn EP0435119A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT06815289A IT1238419B (it) 1989-12-22 1989-12-22 Perfezionamenti al sistema di addolcimento dell'acqua in una macchina di lavaggio
IT6815289 1989-12-22

Publications (1)

Publication Number Publication Date
EP0435119A1 true EP0435119A1 (en) 1991-07-03

Family

ID=11308200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90124313A Withdrawn EP0435119A1 (en) 1989-12-22 1990-12-15 Improvements to the water softening system in a washing machine

Country Status (2)

Country Link
EP (1) EP0435119A1 (it)
IT (1) IT1238419B (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741991A1 (en) * 1995-05-09 1996-11-13 Merloni Elettrodomestici S.p.A. Arrangement for regeneration of the water softening resins in a washing machine
EP0876789A1 (en) * 1997-04-24 1998-11-11 Merloni Elettrodomestici S.p.A. Dishwashing machine with improved liquid dosage device
EP1520506A3 (de) * 2003-09-30 2010-11-10 Miele & Cie. KG Verfahren zum Spülen von Spülgut in einer Spülmachine
KR101054130B1 (ko) 2004-05-20 2011-08-03 엘지전자 주식회사 식기 세척기의 에어 브레이크 구조
KR101065697B1 (ko) * 2004-12-30 2011-09-19 엘지전자 주식회사 식기세척기의 에어 브레이크 어셈블리 및 이를 이용한급수제어방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1551606A (it) * 1967-01-18 1968-12-27
EP0000942A1 (de) * 1977-08-31 1979-03-07 Hobart Corporation (a corporation of the State of OHIO) Wasserbehandlungsgerät für eine Geschirrspülmaschine
DE3239226C1 (de) * 1982-10-22 1984-01-19 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Geschirrspülmaschine
DE3438232A1 (de) * 1984-10-18 1986-04-24 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Absperrventil in druckgeminderten fluessigkeitsleitungen von haushalt-geschirrspuelmaschinen
DE3519831A1 (de) * 1985-06-03 1986-12-04 Bosch-Siemens Hausgeräte GmbH, 8000 München Verfahren zum betreiben einer waschmaschine mit einer eingebauten wasserenthaertungsanlage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1551606A (it) * 1967-01-18 1968-12-27
EP0000942A1 (de) * 1977-08-31 1979-03-07 Hobart Corporation (a corporation of the State of OHIO) Wasserbehandlungsgerät für eine Geschirrspülmaschine
DE3239226C1 (de) * 1982-10-22 1984-01-19 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Geschirrspülmaschine
DE3438232A1 (de) * 1984-10-18 1986-04-24 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Absperrventil in druckgeminderten fluessigkeitsleitungen von haushalt-geschirrspuelmaschinen
DE3519831A1 (de) * 1985-06-03 1986-12-04 Bosch-Siemens Hausgeräte GmbH, 8000 München Verfahren zum betreiben einer waschmaschine mit einer eingebauten wasserenthaertungsanlage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741991A1 (en) * 1995-05-09 1996-11-13 Merloni Elettrodomestici S.p.A. Arrangement for regeneration of the water softening resins in a washing machine
EP0876789A1 (en) * 1997-04-24 1998-11-11 Merloni Elettrodomestici S.p.A. Dishwashing machine with improved liquid dosage device
EP1520506A3 (de) * 2003-09-30 2010-11-10 Miele & Cie. KG Verfahren zum Spülen von Spülgut in einer Spülmachine
KR101054130B1 (ko) 2004-05-20 2011-08-03 엘지전자 주식회사 식기 세척기의 에어 브레이크 구조
KR101065697B1 (ko) * 2004-12-30 2011-09-19 엘지전자 주식회사 식기세척기의 에어 브레이크 어셈블리 및 이를 이용한급수제어방법

Also Published As

Publication number Publication date
IT8968152A1 (it) 1991-06-22
IT1238419B (it) 1993-07-26
IT8968152A0 (it) 1989-12-22

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

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Effective date: 19920104