EP1452123A1 - Automatische Warenspülmaschine mit verbesserter Wasserzuführleitung - Google Patents

Automatische Warenspülmaschine mit verbesserter Wasserzuführleitung Download PDF

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Publication number
EP1452123A1
EP1452123A1 EP03029545A EP03029545A EP1452123A1 EP 1452123 A1 EP1452123 A1 EP 1452123A1 EP 03029545 A EP03029545 A EP 03029545A EP 03029545 A EP03029545 A EP 03029545A EP 1452123 A1 EP1452123 A1 EP 1452123A1
Authority
EP
European Patent Office
Prior art keywords
reservoir
water
warewashing machine
machine according
circuit
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
EP03029545A
Other languages
English (en)
French (fr)
Other versions
EP1452123B1 (de
Inventor
Fabio Colonnello
Omar Bigaran
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.)
Electrolux AB
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Publication of EP1452123A1 publication Critical patent/EP1452123A1/de
Application granted granted Critical
Publication of EP1452123B1 publication Critical patent/EP1452123B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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 an automatic warewashing machine for professional, heavy-duty applications, provided with an improved water supply circuit, in particular of the type including means for softening the in-flowing supply water and a system for regenerating the water-softener means themselves.
  • the regeneration of water softener means is carried out automatically by the machine itself through an appropriately provided system which, under the control of a special programme, provides for a salt solution to be delivered into said water softener means.
  • the amount of salt that is each time needed to complete a regeneration cycle is generally stored in a reservoir that the user/operator shall fill up periodically. Since such a reservoir is involved by a passage of water flowing therethrough during the regeneration cycle, it will therefore be found to be at least partially filled with water at the end of the same cycle. As a result, when the user/operator tries to open the reservoir in view of restoring the amount of salt in the same reservoir, the water contained therein flows out uncontrolled.
  • Such a chamber enables two or more conduits to be physically separated from each other, while anyway ensuring fluid transport from the upstream side to the downstream side of the same chamber.
  • the warewashing machine must on the one side be necessarily connected to a separation chamber of the above cited kind for due compliance to the applying regulations, on the other side such a connection implies the disadvantage of calling for an additional water pump to be used for installation between the air-gap and the warewashing machine in view of supplying the latter with water at the correct pressure value needed for working.
  • the presence of such an additional pump is clearly disadvantageous, since it causes production costs to undesirably increase.
  • it is a purpose of the present invention is to provide an automatic warewashing machine for professional applications, which does not enable any direct contact between the fluid used for washing and the water supply system.
  • a further purpose of the present invention is to provide an automatic warewashing machine for professional applications, which is capable of operating with a simple connection to the water supply system, without requiring any connection to any further apparatus or piece of equipment.
  • Another purpose yet of the present invention is to provide an automatic warewashing machine for professional applications, which enables the regeneration arrangement to be restored without causing any water to be uncontrollably spilled.
  • the warewashing machine comprises at least a main water inlet fitting 1 for the connection of the machine to the water supply.
  • a water supply circuit 2 which connects in series with each other an apparatus 3 containing water softening resins, generally referred to as "water softener", a separation chamber or air-break 4, a pump 6 for delivering water to a washing vessel 7 accommodating water spray means 8.
  • heating means 5 are provided upstream of the pump 6 for heating up the water.
  • the above-cited water supply circuit 2 includes at least a valve 9, as well as, preferably, a check valve 10 adapted to prevent water being conveyed towards the warewashing machine from being able to flow back towards the water supply system.
  • the water supply circuit 2 is involved in water passing therethrough during the normal operation of the warewashing machine, i.e. during the washing process taking place inside the washing vessel 7.
  • the automatic warewashing machine for professional uses according to the present invention is provided with a regeneration water circuit 11 provided with at least a valve 12 that is capable of conveying a maximum flow rate which is lower than the flow rate of the valve 9 of the main water supply circuit 2.
  • This regeneration water circuit 11 conveys water taken in from the water supply system towards a reservoir 13 provided for storing the salt intended for the regeneration of the effectiveness of the resins contained in said water softener apparatus 3.
  • the water mixes with the salt and the thus forming salt solution is conveyed from the portion of regeneration circuit 11 situated downstream of the reservoir 13 into the portion of main water supply circuit 2 situated upstream of the water softener apparatus 3. In this manner, the salt solution flows into the water softener apparatus 3, thereby starting the regeneration process of the resins.
  • the regeneration water circuit 11 which fluidly connects the water softener apparatus 3 with the reservoir 13, there is provided a first check valve 14 enabling flow to take place solely in the direction towards said water softener apparatus 3.
  • the process of regeneration of the water softener apparatus 3, as on the other hand the whole operation of the automatic warewashing machine according to the present invention, is controlled and carried out in a fully automatic manner; however, once such a process is concluded, the need arises for the user/operator to re-fill salt in the reservoir 13, so as to restore the necessary amount thereof and prepare the machine in view of the next regeneration process that it is due to carry out.
  • the warewashing machine Since the reservoir 13 is separate from the washing vessel 7 of the machine, in order to avoid that, when the reservoir 13 is re-filled with salt, water remaining in said reservoir after the regeneration process may spill out therefrom in an uncontrolled manner, the warewashing machine according to the present invention is made and arranged so that the reservoir 13 is further connected fluidly with means 15 for draining the same reservoir 13 through a proper emptying circuit 16.
  • the draining operation is controlled and started automatically by the machine and it is performed prior to a signal being issued to tell the user/operator to restore the salt content in said reservoir 13.
  • the above-cited reservoir emptying circuit 16 further connects the reservoir 13 with the separation chamber 4 ,and comprises first valve means 17 to enable or shut off water flow therethrough.
  • said reservoir emptying circuit 16 is connected to the portion of the regeneration circuit 11 that is situated downstream of the reservoir 13.
  • the above-cited means 15 for draining the reservoir 13 are preferably constituted by a vibration pump that is capable of drawing in water in which salt in a solid form is mixed.
  • the reservoir emptying circuit 16 is connected to flushing means 20 provided to rinse it.
  • flushing means 20 are constituted by a conduit conveying water in the chemical-physical conditions as delivered by said water supply system 4, and this conduit comprises second valve means 21 to start and cut off rinsing of said emptying circuit 16, as well as a valve 22 for adjusting the flow rate, the highest value of which is comprised between the highest flow-rate values of the valves 12 and 9 provided in the regeneration circuit 11 and the water supply circuit 2, respectively.
  • a pressure compensation circuit 18 connects the separation chamber 4 with the reservoir 13.
  • a second check valve 19 is installed in said pressure compensation circuit 18, so as flow is actually allowed to solely take place towards said reservoir 13.

Landscapes

  • Treatment Of Water By Ion Exchange (AREA)
  • Washing And Drying Of Tableware (AREA)
EP03029545A 2003-02-26 2003-12-22 Automatische Warenspülmaschine mit verbesserter Wasserzuführleitung Expired - Lifetime EP1452123B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN20030014 2003-02-26
IT000014A ITPN20030014A1 (it) 2003-02-26 2003-02-26 Macchina lavastoviglie automatica per collettivita' con

Publications (2)

Publication Number Publication Date
EP1452123A1 true EP1452123A1 (de) 2004-09-01
EP1452123B1 EP1452123B1 (de) 2009-09-02

Family

ID=32750516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03029545A Expired - Lifetime EP1452123B1 (de) 2003-02-26 2003-12-22 Automatische Warenspülmaschine mit verbesserter Wasserzuführleitung

Country Status (4)

Country Link
EP (1) EP1452123B1 (de)
AT (1) ATE441352T1 (de)
DE (1) DE60329067D1 (de)
IT (1) ITPN20030014A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1721558A2 (de) * 2005-05-13 2006-11-15 INVENSYS CONTROLS ITALY Srl Verfahren und Vorrichtung zur Zuführung von Wasser in einer Waschmaschine
CN102276928A (zh) * 2011-06-17 2011-12-14 湖北祥源新材科技有限公司 一种烯烃类橡胶高阻燃耐油热缩套管及其制备方法
EP2623013A1 (de) * 2012-02-02 2013-08-07 Bonferraro S.p.A. Gewerblicher Geschirrspüler mit einem verbessertem Kreislauf zur Wasserenthärtung und entsprechendes Betriebsverfahren
DE102018118109A1 (de) * 2018-07-26 2020-01-30 Illinois Tool Works Inc. Spülmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017207568B3 (de) 2017-05-05 2018-09-06 BSH Hausgeräte GmbH Enthärtungsanlage und wasserführendes Haushaltsgerät

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU41345A1 (de) * 1961-03-17 1962-05-08
US3414130A (en) * 1964-07-29 1968-12-03 Philips Corp Apparatus for regenerating a water softener in combination with a washing machine
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
US4379057A (en) * 1979-12-17 1983-04-05 Gebruder Heyl KG Method for the cyclic regeneration of water-softening systems and programmed water-softening system for applying the method
US4776891A (en) * 1985-09-23 1988-10-11 Murtha James L Method and means of rinsing eating utensils
DE3736311A1 (de) * 1987-10-27 1989-05-11 Licentia Gmbh Programmgesteuerte wasch- oder geschirrspuelmaschine mit einer wasserenthaertungseinrichtung
EP0900765A2 (de) * 1997-09-03 1999-03-10 AWECO Kunststofftechnik Gerätebau GmbH & Co. KG Vorrichtung zur Wasserenthärtung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU41345A1 (de) * 1961-03-17 1962-05-08
DE1628550B1 (de) * 1962-02-22 1970-09-24 Constructa Werke Gmbh Basenaustauschenthärter zur Spülwasserbehandlung bei Geschirrspülmaschinen
US3414130A (en) * 1964-07-29 1968-12-03 Philips Corp Apparatus for regenerating a water softener in combination with a washing machine
US3680703A (en) * 1971-03-26 1972-08-01 Nat Water Pure Corp Water-softening and regeneration process
US4379057A (en) * 1979-12-17 1983-04-05 Gebruder Heyl KG Method for the cyclic regeneration of water-softening systems and programmed water-softening system for applying the method
US4776891A (en) * 1985-09-23 1988-10-11 Murtha James L Method and means of rinsing eating utensils
DE3736311A1 (de) * 1987-10-27 1989-05-11 Licentia Gmbh Programmgesteuerte wasch- oder geschirrspuelmaschine mit einer wasserenthaertungseinrichtung
EP0900765A2 (de) * 1997-09-03 1999-03-10 AWECO Kunststofftechnik Gerätebau GmbH & Co. KG Vorrichtung zur Wasserenthärtung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1721558A2 (de) * 2005-05-13 2006-11-15 INVENSYS CONTROLS ITALY Srl Verfahren und Vorrichtung zur Zuführung von Wasser in einer Waschmaschine
EP1721558A3 (de) * 2005-05-13 2008-12-24 INVENSYS CONTROLS ITALY Srl Verfahren und Vorrichtung zur Zuführung von Wasser in einer Waschmaschine
CN102276928A (zh) * 2011-06-17 2011-12-14 湖北祥源新材科技有限公司 一种烯烃类橡胶高阻燃耐油热缩套管及其制备方法
EP2623013A1 (de) * 2012-02-02 2013-08-07 Bonferraro S.p.A. Gewerblicher Geschirrspüler mit einem verbessertem Kreislauf zur Wasserenthärtung und entsprechendes Betriebsverfahren
DE102018118109A1 (de) * 2018-07-26 2020-01-30 Illinois Tool Works Inc. Spülmaschine
US11980332B2 (en) 2018-07-26 2024-05-14 Illinois Tool Works Inc. Dishwasher

Also Published As

Publication number Publication date
ITPN20030014A1 (it) 2004-08-27
EP1452123B1 (de) 2009-09-02
DE60329067D1 (de) 2009-10-15
ATE441352T1 (de) 2009-09-15

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