EP1029496B1 - Household dishwasher - Google Patents

Household dishwasher Download PDF

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Publication number
EP1029496B1
EP1029496B1 EP00101981A EP00101981A EP1029496B1 EP 1029496 B1 EP1029496 B1 EP 1029496B1 EP 00101981 A EP00101981 A EP 00101981A EP 00101981 A EP00101981 A EP 00101981A EP 1029496 B1 EP1029496 B1 EP 1029496B1
Authority
EP
European Patent Office
Prior art keywords
circulating pump
group
sprayers
spray
circulation pump
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.)
Revoked
Application number
EP00101981A
Other languages
German (de)
French (fr)
Other versions
EP1029496A3 (en
EP1029496A2 (en
Inventor
Ernst Stickel
Helmut Jerg
Michael Rosenbauer
Bernd Schessl
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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
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Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1029496A2 publication Critical patent/EP1029496A2/en
Publication of EP1029496A3 publication Critical patent/EP1029496A3/en
Application granted granted Critical
Publication of EP1029496B1 publication Critical patent/EP1029496B1/en
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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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms
    • 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0052—Noise reduction
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Definitions

  • the invention relates to a domestic dishwasher with changing feed of at least two sprayers or groups of sprayers, which are supplied by a circulation pump with rinsing liquid for applying to be cleaned.
  • Household dishwashers with alternating operation of the spray levels have long been known, e.g. from DE-OS 24 28 991.
  • the at least two sprayers are fed simultaneously with the funded by a circulating pump liquid.
  • each spray alternately charged sequentially with the funded by a circulation pump liquid so as to full the pressure of the circulation pump to act only on a spraying device and to require a smaller amount of liquid and less energy to circulate and also to heat the circulated liquid.
  • reversing means are used.
  • the invention is therefore based on the object in a domestic dishwasher of the type mentioned when changing from a spraying device or a group of sprayers to another sprayer or group of sprayers in a simple way to avoid increased noise.
  • This object is achieved in that the rotational speed of the circulating pump is controllable, wherein during the change from a spraying device or a group of sprayers to another sprayer or group of sprayers, the speed of the circulating pump is reduced.
  • a household dishwasher comprises a washing container into which goods to be cleaned, e.g. Dirty dishes and cutlery, usually filled in baskets.
  • goods to be cleaned e.g. Dirty dishes and cutlery
  • at least two sprayers are arranged, which act on the material to be cleaned with rinsing liquid.
  • This rinsing liquid usually called rinsing liquor, is conveyed by means of a circulation pump in liquid supply lines to the sprayers.
  • a batch-wise charging of at least two sprayers or groups of sprayers - of spray levels - carried out by the circulation pump so as to make the full pressure of the circulating pump act only on a spray and a smaller Spülillonkeitsmenge and lower energy Circulating and also to heat the circulating flushing liquid to need.
  • reversing means are used to carry out such a method of alternately charging the spraying equipment from a circulating pump.
  • From EP-OS 05 47 011 is known, for example, by means of a hydraulically operated, arranged between liquid supply lines to the spray valves flap valve alternately to open one of the liquid supply lines and at the same time close the other liquid supply lines.
  • From EP-OS 02 37 994 is further known, for example, by means of a ball in the discharge nozzle of the circulating pump, the interruption of the Operation of the circulation pump changes the position, alternately open one of the liquid supply lines and close the other at the same time.
  • EP-PS 05 85 905 known to open by means of a motor-driven, rotating horizontal disc with holes one or more approaches to liquid supply lines and close others
  • the rotational speed of the circulation pump can be regulated.
  • the speed of the circulating pump is reduced according to the invention during the change from a sprayer or a group of sprayers to another sprayer or group of sprayers and thus counteracted a brief startup of the speed of the circulating pump.

Abstract

The dishwasher has at least two alternately supplied spraying devices or groups of devices that are supplied by at least one circulating pump with rinsing liquid for application to the items to be cleaned. The speed of the pump can be regulated, whereby the speed is reduced during a changeover from one sprayer or group off sprayers to another.

Description

Die Erfindung betrifft eine Haushalt-Geschirrspülmaschine mit wechselnder Beschickung von wenigstens zwei Sprüheinrichtungen bzw. Gruppen von Sprüheinrichtungen, die von einer Umwälzpumpe mit Spülflüssigkeit zur Beaufschlagung von zu reinigendem Gut beliefert werden.The invention relates to a domestic dishwasher with changing feed of at least two sprayers or groups of sprayers, which are supplied by a circulation pump with rinsing liquid for applying to be cleaned.

Haushalt-Geschirrspülmaschinen mit Wechselbetrieb der Sprühebenen sind seit langem bekannt, z.B. aus der DE-OS 24 28 991. Bei handelsüblichen Haushalt-Geschirrspülmaschinen werden die wenigstens zwei Sprüheinrichtungen gleichzeitig mit der von einer Umwälzpumpe geförderten Flüssigkeit beschickt. Bei der Haushalt-Geschirrspülmaschine nach der DE-OS 24 28 991 wird aber zur Erzielung eines gleichen oder besseren Reinigungsergebnisses wie bei den vorgeschilderten handelsüblichen Haushalt-Geschirrspülmaschinen jede Sprüheinrichtung wechselnd nacheinander mit der von einer Umwälzpumpe geförderten Flüssigkeit beschickt, um so den vollen Druck der Umwälzpumpe nur an einer Sprüheinrichtung wirken zu lassen und eine geringere Flüssigkeitsmenge und geringere Energie zum Umwälzen und auch zum Erwärmen der umgewälzten Flüssigkeit zu benötigen. Zur Durchführung eines derartigen Verfahrens der wechselweisen Beschickung der Sprüheinrichtungen von einer Umwälzpumpe werden Umsteuereinrichtungen verwendet.Household dishwashers with alternating operation of the spray levels have long been known, e.g. from DE-OS 24 28 991. In commercial household dishwashers, the at least two sprayers are fed simultaneously with the funded by a circulating pump liquid. In the household dishwasher according to DE-OS 24 28 991 but to achieve the same or better cleaning result as in the pre-signed commercial household dishwashers each spray alternately charged sequentially with the funded by a circulation pump liquid, so as to full the pressure of the circulation pump to act only on a spraying device and to require a smaller amount of liquid and less energy to circulate and also to heat the circulated liquid. To carry out such a method of alternately charging the spraying equipment from a circulating pump, reversing means are used.

Beim Umschalten durch diese Umsteuereinrichtungen, üblicherweise sogenannte Wasserweichen, ist es unvermeidlich, daß - wenn auch kurzzeitig - Spülflüssigkeit in beide Zuleitungen zu beiden Sprühebenen geliefert wird. Bei diesem kurzzeitigen, gleichzeitigen Zweiebenenbetrieb kommt es zu einer höheren Belastung der Umwälzpumpe, was zu einer erhöhten Geräuschentwicklung durch die Umwälzpumpe führt.When switching by these reversing devices, usually so-called water points, it is inevitable that - albeit briefly - rinsing fluid is supplied in both supply lines to both spray levels. In this short-term, simultaneous two-level operation, there is a higher load on the circulation pump, which leads to increased noise by the circulation pump.

Der Erfindung liegt daher die Aufgabe zugrunde, bei einer Haushalt-Geschirrspülmaschine der eingangs genannten Art beim Wechsel von einer Sprüheinrichtung bzw. einer Gruppe von Sprüheinrichtungen zu einer weiteren Sprüheinrichtung bzw. Gruppe von Sprüheinrichtungen auf einfache Art und Weise eine erhöhte Geräuschentwicklung zu vermeiden.The invention is therefore based on the object in a domestic dishwasher of the type mentioned when changing from a spraying device or a group of sprayers to another sprayer or group of sprayers in a simple way to avoid increased noise.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Drehzahl der Umwälzpumpe regelbar ist, wobei während des Wechsels von einer Sprüheinrichtung bzw. einer Gruppe von Sprüheinrichtungen zu einer weiteren Sprüheinrichtung bzw. Gruppe von Sprüheinrichtungen die Drehzahl der Umwälzpumpe reduziert wird.This object is achieved in that the rotational speed of the circulating pump is controllable, wherein during the change from a spraying device or a group of sprayers to another sprayer or group of sprayers, the speed of the circulating pump is reduced.

Durch die Reduzierung der Drehzahl der Umwälzpumpe bei jedem Wechsel der Beschickung der Sprühebenen wird einem kurzzeitigen Hochfahren der Drehzahl der Pumpe aufgrund des kurzzeitigen Zweiebenenbetriebes entgegengewirkt und damit einer erhöhten Geräuschentwicklung durch die Umwälzpumpe entgegengewirkt. Mit der Erfindung wird bei einer Haushalt-Geschirrspülmaschine der eingangs genannten Art beim Wechsel von einer Sprüheinrichtung bzw. einer Gruppe von Sprüheinrichtungen zu einer weiteren Sprüheinrichtung bzw. Gruppe von Sprüheinrichtungen auf einfache Art und Weise eine erhöhte Geräuschentwicklung vermieden.By reducing the speed of the circulation pump with each change in the loading of the spray levels a short-term startup of the speed of the pump is counteracted due to the short-term Zweiebenenbetriebes and thus counteracted increased noise by the circulation pump. With the invention, in a domestic dishwasher of the type mentioned in the change from a spray device or a group of sprayers to another sprayer or group of sprayers in a simple manner an increased noise avoided.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispieles einer Haushalt-Geschirrspülmaschine erläutert.The invention will be explained below with reference to an embodiment of a domestic dishwasher.

Eine erfindungsgemäße Haushalt-Geschirrspülmaschine weist einen Spülbehälter auf, in den zu reinigendes Gut, z.B. verschmutztes Geschirr und Besteck, üblicherweise in Geschirrkörbe eingefüllt wird. In dem Spülbehälter sind erfindungsgemäß wenigstens zwei Sprüheinrichtungen angeordnet, die das zu reinigende Gut mit Spülflüssigkeit beaufschlagen. Diese Spülflüssigkeit, üblicherweise Spülflotte genannt, wird mittels einer Umwälzpumpe in Flüssigkeitszuleitungen zu den Sprüheinrichtungen gefördert.A household dishwasher according to the invention comprises a washing container into which goods to be cleaned, e.g. Dirty dishes and cutlery, usually filled in baskets. In the washing container according to the invention at least two sprayers are arranged, which act on the material to be cleaned with rinsing liquid. This rinsing liquid, usually called rinsing liquor, is conveyed by means of a circulation pump in liquid supply lines to the sprayers.

Bei der erfindungsgemäßen Haushalt-Geschirrspülmaschine wird ein wechseweises Beschicken von wenigstens zwei Sprüheinrichtungen bzw. Gruppen von Sprüheinrichtungen - von Sprühebenen - durch die Umwälzpumpe durchgeführt, um so den vollen Druck der Umwälzpumpe nur an einer Sprüheinrichtung wirken zu lassen und eine geringere Spülflüssigkeitsmenge und geringere Energie zum Umwälzen und auch zum Erwärmen der umgewälzten Spülflüssigkeit zu benötigen. Zur Durchführung eines derartigen Verfahrens der wechselweisen Beschickung der Sprüheinrichtungen von einer Umwälzpumpe werden Umsteuereinrichtungen verwendet.In the household dishwasher according to the invention, a batch-wise charging of at least two sprayers or groups of sprayers - of spray levels - carried out by the circulation pump, so as to make the full pressure of the circulating pump act only on a spray and a smaller Spülflüssigkeitsmenge and lower energy Circulating and also to heat the circulating flushing liquid to need. To carry out such a method of alternately charging the spraying equipment from a circulating pump, reversing means are used.

Aus der EP-OS 05 47 011 ist beispielsweise bekannt, mittels eines hydraulisch betätigten, zwischen Flüssigkeitszuleitungen zu den Sprüheinrichtungen angeordneten Klappenventils wechselweise eine der Flüssigkeitszuleitungen zu öffnen und gleichzeitig die anderen Flüssigkeitszuleitungen zu schließen. Aus der EP-OS 02 37 994 ist weiterhin beispielsweise bekannt, mittels einer Kugel im Druckstutzen der Umwälzpumpe, die bei Unterbrechung des Betriebes der Umwälzpumpe die Lage ändert, wechselweise eine der Flüssigkeitszuleitungen zu öffnen und die andere gleichzeitig zu schließen. Ferner ist beispielsweise aus dem EP-PS 05 85 905 bekannt, mittels einer motorisch angetriebenen, sich drehenden horizontalen Scheibe mit Bohrungen einen oder mehrere Zugänge zu Flüssigkeitszuleitungen zu öffnen und andere zu schließenFrom EP-OS 05 47 011 is known, for example, by means of a hydraulically operated, arranged between liquid supply lines to the spray valves flap valve alternately to open one of the liquid supply lines and at the same time close the other liquid supply lines. From EP-OS 02 37 994 is further known, for example, by means of a ball in the discharge nozzle of the circulating pump, the interruption of the Operation of the circulation pump changes the position, alternately open one of the liquid supply lines and close the other at the same time. Further, for example, from EP-PS 05 85 905 known to open by means of a motor-driven, rotating horizontal disc with holes one or more approaches to liquid supply lines and close others

Beim Umschalten der Klappe nach der EP-OS 05 47 011 wie auch bei der Lageänderung der Kugel nach der EP-OS 02 37 994 und auch beim Verdrehen der Scheibe von einer Bohrung zu einer nächsten Bohrung nach dem EP-PS 05 85 905 kommt es unweigerlich zu einem kurzzeitigen Beschicken der Spülflüssigkeit in beide Zuleitungen. Bei diesem kurzzeitigen, gleichzeitigen Zweiebenenbetrieb kommt es zu einem kurzzeitigen Hochfahren der Drehzahl der Umwälzpumpe, was zu einer erhöhten Geräuschentwicklung durch die Umwälzpumpe führt.When switching the flap according to EP-OS 05 47 011 as well as the change in position of the ball according to EP-OS 02 37 994 and also during rotation of the disc from a bore to a next hole after EP-PS 05 85 905 it comes inevitably to a brief loading of the washing liquid in both supply lines. In this short-term, simultaneous two-level operation, there is a short-term startup of the speed of the circulation pump, which leads to increased noise by the circulation pump.

Erfindungsgemäß ist die Drehzahl der Umwälzpumpe regelbar.According to the invention, the rotational speed of the circulation pump can be regulated.

Um beim Umschalten durch Umsteuereinrichtungen, z.B. wie oben geschildert, eine bei dem unvermeidlichen kurzzeitigen, gleichzeitigen Zweiebenenbetrieb erhöhten Geräuschentwicklung durch die Umwälzpumpe zu vermeiden, wird erfindungsgemäß die Drehzahl der Umwälzpumpe während des Wechsels von einer Sprüheinrichtung bzw. einer Gruppe von Sprüheinrichtungen zu einer weiteren Sprüheinrichtung bzw. Gruppe von Sprüheinrichtungen reduziert und damit einem kurzzeitigen Hochfahren der Drehzahl der Umwälzpumpe entgegengewirkt.In order to switch over by switching means, e.g. As described above, to avoid increased in the inevitable short-term, simultaneous Zweiebenenbetrieb noise by the circulation pump, the speed of the circulating pump is reduced according to the invention during the change from a sprayer or a group of sprayers to another sprayer or group of sprayers and thus counteracted a brief startup of the speed of the circulating pump.

Mit der Erfindung wird bei einer Haushalt-Geschirrspülmaschine der eingangs genannten Art beim Wechsel von einer Sprüheinrichtung bzw. einer Gruppe von Sprüheinrichtungen zu einer weiteren Sprüheinrichtung bzw. Gruppe von Sprüheinrichtungen auf einfache Art und Weise eine erhöhte Geräuschentwicklung vermieden.With the invention, in a domestic dishwasher of the type mentioned in the change from a spray device or a group of sprayers to another sprayer or group of sprayers in a simple manner an increased noise avoided.

Claims (1)

  1. Domestic dishwashing machine with alternating loading by means of a rerouting device, which is independent of a rotational speed of a circulating pump, of at least two spray devices or groups of spray devices, which are supplied by the circulating pump with liquid for action on stock to be cleaned, characterised in that the rotational speed of the circulating pump is regulable, wherein during the change from one spray device or group of spray devices to another spray device or group of spray devices to another spray device or group of spray devices the rotational speed of the circulating pump is reduced in order to avoid increased output of noise by the circulating pump during switching over of the rerouting device.
EP00101981A 1999-02-19 2000-02-01 Household dishwasher Revoked EP1029496B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19907188A DE19907188A1 (en) 1999-02-19 1999-02-19 Household dishwasher
DE19907188 1999-02-19

Publications (3)

Publication Number Publication Date
EP1029496A2 EP1029496A2 (en) 2000-08-23
EP1029496A3 EP1029496A3 (en) 2000-11-22
EP1029496B1 true EP1029496B1 (en) 2006-05-24

Family

ID=7898183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00101981A Revoked EP1029496B1 (en) 1999-02-19 2000-02-01 Household dishwasher

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Country Link
EP (1) EP1029496B1 (en)
AT (1) ATE326897T1 (en)
DE (2) DE19907188A1 (en)
ES (1) ES2264913T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20010238A1 (en) * 2001-02-07 2002-08-07 T & P Spa DIVERTER VALVE FOR WASHING MACHINE AND RELATED METHODS OF APPLICATION
DE20122635U1 (en) 2001-12-21 2006-10-05 BSH Bosch und Siemens Hausgeräte GmbH Fluid flow control for dish washer has pump speed controlled and cross section of fluid feed to washing container varied
DE102004059722A1 (en) * 2004-12-11 2006-06-14 Electrolux Home Products Corporation N.V. Method for operating a dishwasher
KR101526987B1 (en) * 2008-08-21 2015-06-11 엘지전자 주식회사 Dishwasher and the control method thereof
EP2798993B1 (en) * 2013-04-29 2016-11-16 Miele & Cie. KG Device for performing a flushing programme

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547011A1 (en) * 1991-12-11 1993-06-16 Colged S.R.L. A washing method for a dishwashing machine of industrial type
EP0943282A2 (en) * 1998-03-20 1999-09-22 AEG Hausgeräte GmbH Dishwasher

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1191526B (en) * 1986-03-19 1988-03-23 Zanussi Elettrodomestici WASHING MACHINE WITH FLUID DISTRIBUTION VALVE OF A LIQUID
DE4303479C2 (en) * 1993-02-06 1998-05-20 Fhp Motors Gmbh Pump unit with a variable speed electric motor
US5924432A (en) * 1995-10-17 1999-07-20 Whirlpool Corporation Dishwasher having a wash liquid recirculation system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547011A1 (en) * 1991-12-11 1993-06-16 Colged S.R.L. A washing method for a dishwashing machine of industrial type
EP0943282A2 (en) * 1998-03-20 1999-09-22 AEG Hausgeräte GmbH Dishwasher

Also Published As

Publication number Publication date
EP1029496A3 (en) 2000-11-22
ATE326897T1 (en) 2006-06-15
DE19907188A1 (en) 2000-08-24
EP1029496A2 (en) 2000-08-23
ES2264913T3 (en) 2007-02-01
DE50012795D1 (en) 2006-06-29

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