EP2175766B1 - Geschirrspülmaschine - Google Patents

Geschirrspülmaschine Download PDF

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Publication number
EP2175766B1
EP2175766B1 EP08774611A EP08774611A EP2175766B1 EP 2175766 B1 EP2175766 B1 EP 2175766B1 EP 08774611 A EP08774611 A EP 08774611A EP 08774611 A EP08774611 A EP 08774611A EP 2175766 B1 EP2175766 B1 EP 2175766B1
Authority
EP
European Patent Office
Prior art keywords
dishwasher
turbidity
water
pump motor
speed
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.)
Active
Application number
EP08774611A
Other languages
English (en)
French (fr)
Other versions
EP2175766A1 (de
Inventor
Songul Bayraktar
Bulent Kucukcoskun
Ebru Cetinkaya
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Priority to PL08774611T priority Critical patent/PL2175766T3/pl
Publication of EP2175766A1 publication Critical patent/EP2175766A1/de
Application granted granted Critical
Publication of EP2175766B1 publication Critical patent/EP2175766B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
    • 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
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention

Definitions

  • the present invention relates to dishwashers comprising a turbidity sensor.
  • a washing program is implemented that is comprised of various steps such as pre-washing, main washing and rinsing.
  • turbidity sensors are used for detecting the dirt of the dishes placed in the machine or whether the dishes are properly cleaned after washing.
  • these turbidity sensors used are affected by factors such as intake of water into the washing chamber and the rotational speed of the spray arms and as a result the measurement cannot be performed accurately.
  • the aim of the present invention is the realization of a dishwasher wherein the program and program parameter selection based on turbidity detection is made with high accuracy.
  • a turbidity sensor is used for measuring the turbidity of water in order to detect the dirt amount of the dishes for determining the washing program steps and the parameters such as water temperature, duration etc. relating to these steps.
  • the turbidity sensor performs all the measurement activities while the working conditions of the spray arms are at a constant value predetermined by the producer.
  • the turbidity sensor takes measurements only while the upper spray arm is rotating. Accordingly, measurement is taken while water is sprayed into the washing chamber with a lower pressure thereby minimizing the deviation in the measurement.
  • the turbidity measurements are taken while both of the spray arms are rotating.
  • measurements are made with identical deviations without disrupting the normal working process by taking the measurement in a frequent condition of the dishwasher during washing.
  • the turbidity is measured while the speed of the pump motor actuating the spray arms is at value predetermined by the producer.
  • the speed of the pump motor predetermined by the producer for taking measurements is not a speed at which the pump motor operates normally during the program steps of the dishwasher. For example, while the pump motor is operated at 2500-3000 rpm speed, the speed of the pump motor is reduced to 1500 rpm and measurement is performed when the turbulence that will cause deviation in the sprayed water is lower.
  • Figure 1 - is the schematic view of a dishwasher.
  • the dishwasher (1) provides cleaning of the dishes in accordance with a washing program that includes at least some of the various steps like pre-washing, main washing, rinsing, drying, regeneration.
  • the dishwasher (1) comprises a washing chamber (2) wherein the dishes to be washed are emplaced, at least one spray arm (4, 104) that sprays water on the dishes while rotating around its axis, at least one pump motor (3) for the water to be circulated and to be sprayed from the spray arms (4, 104), at least one turbidity sensor (5) that performs the wash water turbidity measurements in order to detect the dirtiness of the dishes only while the speed (w) of the pump motor (3) is at a constant value predetermined by the producer and/or while water is directed to always the same spray arm/spray arms (4, 104) ( Figure 1 ).
  • two spray arms (4, 104), an upper (4) one and a lower (104) one, are used.
  • the turbidity sensor (5) takes measurements only while the upper spray arm (4) is rotating.
  • the turbidity sensor (5) takes measurements while both of the spray arms (4, 104) are rotating.
  • a variable speed, brushless direct current pump motor (3) is used.
  • the turbidity sensor (5) takes measurements while the speed (w) of the pump motor (3) is at a value (w m ) predetermined by the producer.
  • the speed (w m ) of the pump motor (3) predetermined by the producer for taking measurements is a speed not normally used by the pump motor (3) during the program steps of the dishwasher (1).
  • the speed of the pump motor (3) is reduced to 1500 rpm and turbidity measurement is performed at this speed.
  • the deviation in the measurement of the turbidity sensor (5) caused by the turbulence generated due to the speed and direction of water intake into the washing chamber (2) or the motion of the spray arms (4, 104) during the washing steps is maintained to be constant thereby increasing the accuracy in selections of program and program parameters performed in accordance with the data received from the turbidity sensor (5).

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Lubricants (AREA)
  • Harvesting Machines For Specific Crops (AREA)
  • Table Devices Or Equipment (AREA)

Claims (4)

  1. Geschirrspülmaschine (1), umfassend eine Spülkammer (2), in die das zu spülende Geschirr gegeben wird, mindestens einen Sprüharm (4, 104), der Wasser auf das Geschirr sprüht, während er sich um seine Achse dreht, mindestens einen Pumpenmotor (3) zum Zirkulieren und zum Sprühen des Wassers aus den Sprüharmen (4, 104), mindestens einen Trübungssensor (5), der die Trübung des Wassers misst, um die Verschmutzung des Geschirrs zu detektieren, dadurch gekennzeichnet, dass der Trübungssensor (5) die Trübungsmessungen des Spülwassers nur durchführt, während die Drehzahl (w) des Pumpenmotors (3) sich auf einem konstanten Wert befindet, der vom Hersteller im Voraus festgelegt wird, und/oder während Wasser stets zu demselben Sprüharm/denselben Sprüharmen (4, 104) geleitet wird.
  2. Geschirrspülmaschine (1) nach Anspruch 1, gekennzeichnet durch zwei Sprüharme (4, 104), einen oberen (4) und einen unteren (104), wobei der Trübungssensor (5) nur dann Messungen vornimmt, wenn sich der obere Sprüharm (4) dreht.
  3. Geschirrspülmaschine (1) nach Anspruch 1, gekennzeichnet durch zwei Sprüharme (4, 104), einen oberen (4) und einen unteren (104), wobei der Trübungssensor (5) nur dann Messungen vornimmt, wenn sich beide Sprüharme (4, 104) drehen.
  4. Geschirrspülmaschine (1) nach einem der vorangehenden Ansprüche, umfassend einen Pumpenmotor mit Drehzahlregelung (3), und dadurch gekennzeichnet, dass der Trübungssensor (5) nur dann Messungen vornimmt, wenn die Drehzahl (w) des Pumpenmotors (3) sich auf einen Wert (wm) verändert, der vom Hersteller im Voraus festgelegt wird.
EP08774611A 2007-07-02 2008-07-02 Geschirrspülmaschine Active EP2175766B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08774611T PL2175766T3 (pl) 2007-07-02 2008-07-02 Zmywarka do naczyń

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200704577 2007-07-02
PCT/EP2008/058468 WO2009004014A1 (en) 2007-07-02 2008-07-02 A dishwasher

Publications (2)

Publication Number Publication Date
EP2175766A1 EP2175766A1 (de) 2010-04-21
EP2175766B1 true EP2175766B1 (de) 2010-10-06

Family

ID=39720111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08774611A Active EP2175766B1 (de) 2007-07-02 2008-07-02 Geschirrspülmaschine

Country Status (5)

Country Link
EP (1) EP2175766B1 (de)
AT (1) ATE483392T1 (de)
DE (1) DE602008002949D1 (de)
PL (1) PL2175766T3 (de)
WO (1) WO2009004014A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1392420B1 (it) † 2008-12-22 2012-03-02 Indesit Co Spa Lavastoviglie.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040079400A1 (en) * 2002-10-25 2004-04-29 Young Raymond A. Dishwasher having a variable speed circulation pump controlled responsive to sensed turbidity
DE10319467B3 (de) * 2003-04-29 2004-07-22 Miele & Cie. Kg Einrichtung mit einem Trübungssensor für eine Geschirrspülmaschine oder Waschmaschine
DE10359841A1 (de) * 2003-12-19 2005-07-21 Electrolux Home Products Corporation N.V. Geschirrspülmaschine mit einer Flüssigkeitsverteilungseinrichtung und Verfahren zum Umschalten derselben
US7588038B2 (en) * 2004-06-05 2009-09-15 Lg Electronics Inc. Sump assembly for dishwasher
KR20060010361A (ko) * 2004-07-28 2006-02-02 엘지전자 주식회사 식기 세척기의 탁도 센서 장착 구조

Also Published As

Publication number Publication date
EP2175766A1 (de) 2010-04-21
ATE483392T1 (de) 2010-10-15
DE602008002949D1 (de) 2010-11-18
WO2009004014A1 (en) 2009-01-08
PL2175766T3 (pl) 2011-01-31

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