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WO2009004019A1 - A dishwasher - Google Patents

A dishwasher Download PDF

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Publication number
WO2009004019A1
WO2009004019A1 PCT/EP2008/058476 EP2008058476W WO2009004019A1 WO 2009004019 A1 WO2009004019 A1 WO 2009004019A1 EP 2008058476 W EP2008058476 W EP 2008058476W WO 2009004019 A1 WO2009004019 A1 WO 2009004019A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
regeneration
dishwasher
frequency
control unit
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.)
Ceased
Application number
PCT/EP2008/058476
Other languages
French (fr)
Inventor
Songul Bayraktar
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 DE602008002950T priority Critical patent/DE602008002950D1/en
Priority to PL08774617T priority patent/PL2175767T3/en
Priority to DK08774617.8T priority patent/DK2175767T3/en
Priority to AT08774617T priority patent/ATE483393T1/en
Priority to EP08774617A priority patent/EP2175767B1/en
Publication of WO2009004019A1 publication Critical patent/WO2009004019A1/en
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/11—Water hardness, acidity or basicity
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/22—Number of operational cycles
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/34—Other automatic detections
    • 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
    • A47L2501/26—Indication or alarm to the controlling device or to the user
    • 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
    • A47L2501/34—Change machine operation from normal operational mode into special mode, e.g. service mode, resin regeneration mode, sterilizing mode, steam mode, odour eliminating mode or special cleaning mode to clean the hydraulic circuit

Definitions

  • the present invention relates to dishwashers wherein a program including the regeneration step is operated.
  • a washing program is implemented that is comprised of various steps such as pre-washing, main washing and rinsing.
  • the washing and/or drying performance is inversely proportional to the hardness level of the water.
  • the hardness of water results from the dissolved positive calcium or magnesium ions (Ca++ and Mg++) contained therein.
  • the water used in washing is first passed through an ion exchanger, for example a resin.
  • the ion exchanger absorbs these ions from the water and gives off sodium ions (Na+) instead. Consequently, the hardness of water is reduced.
  • the ion exchanger cannot absorb the calcium and magnesium ions anymore.
  • the ion exchanger is kept in a salt compound (for example NaCI) to extract the calcium and magnesium ions and to become enriched in sodium ions again.
  • a salt compound for example NaCI
  • This process is called regeneration. Determining the frequency of the regeneration process (every once washing) is important for the performance of the dishwasher. If the regeneration process is performed more frequently than required, then salt consumption will increase unnecessarily. And when the regeneration process is delayed, then calcium deposits will be formed on the washed dishes.
  • Sensors are used in the technique for performing the regeneration process in the correct frequency.
  • the frequency of the regeneration is adjusted according to data received from the said sensor.
  • German Patent Application No DE19841568 a dishwasher is explained that comprises an electrical conductivity sensor that measures the electrical conductivity of water both before and after water is passed through the ion exchanger.
  • the decision for regeneration is given by registering and comparing the difference with previous values of conductivity from earlier treatment cycles detected by the two sensors. If the said difference is below a threshold value then it is understood that the ion exchanger is not functioning properly and regeneration is performed.
  • the explained dishwasher comprises a conductivity sensor that measures the conductivity of the ion exchanger. When to perform the regeneration process is determined according to the measured value.
  • the aim of the present invention is the realization of a dishwasher wherein the regeneration process is performed at certain intervals even in the case that data cannot be received from the sensor that determines when to perform the regeneration process.
  • a sensor determines whether or not a regeneration process is required. In case data cannot be received from the sensor, the frequency in which the regeneration process will be performed is determined by the frequency value stored in the memory of the control unit.
  • the frequency in which the regeneration process will be performed is recorded in the control unit according to the data received while the sensor operates trouble free and when data cannot be received from the sensor, regeneration process is continued according to these values.
  • the frequency in which the regeneration process will be performed can be determined by methods such as using the last one of the previous recorded values, average of the values or the moving average of the last 5 values.
  • water hardness level is measured and according to this value the frequency value is recorded in the memory of the control unit during the installation of the dishwasher by the user or the after sale service personnel and when data cannot be received from the sensor the regeneration process is performed according to the said value.
  • 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, an ion exchanger (3) that reduces the hardness of the water to be delivered into the washing chamber (2) and a salt chamber (4) containing the salt required for the regeneration of the ion exchanger (3), being in communication with the ion exchanger (3) ( Figure
  • the dishwasher (1) comprises a sensor (5) that detects the ion exchanger (3) cannot absorb the calcium and magnesium ions of the water passing therethrough anymore and a control unit (6) that triggers the regeneration process in accordance with the data received from the sensor (5).
  • the sensor (5) under normal work conditions, delivers data to the control unit (6) at the start of each washing process about whether or not the regeneration process will be performed.
  • the control unit (6) stores in the memory thereof a frequency of regeneration value (n) that is used to determine when the regeneration process will be performed in the case that data cannot be received from the sensor (5) due to a malfunction such as the electrical connection of the sensor (5) being detached or becoming inoperative.
  • the control unit (6) performs the regeneration process periodically after a certain number (n) of washing programs in accordance with the recorded frequency of regeneration value (n) if data cannot be received from the sensor (5).
  • the frequency of regeneration value (n) is recorded in the memory of the control unit (6) during the installation of the dishwasher (1) by the user or the service personnel.
  • the information relating to the performed frequency of the regeneration process in accordance with the data received from the sensor (5) is recorded in the control unit (6) as the frequency of regeneration value (n) and at each regeneration process this value is updated.
  • the information relating to the performed frequency of regeneration process in accordance with the data received from the sensor (5) is recorded in the control unit (6) and the frequency of regeneration value (n) is determined by taking the average of the recorded data.
  • the control unit (6) when regeneration process is performed according to the frequency of regeneration value (n) because data cannot be received from the sensor (5), the control unit (6) delivers a warning to the user for informing about the problem in the sensor (5).
  • a dishwasher (1) is designed that continues to operate by performing regeneration at a certain frequency (n) even in the case that data cannot be received from the sensor (5) that determines when to perform the regeneration process without the intervention of the user or the service personnel.

Landscapes

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

Abstract

The present invention relates to a dishwasher (1) that performs the regeneration process at certain intervals without the intervention of the user or the service personnel even in the case that data cannot be received from the sensor (5) that determines when to perform the regeneration process.

Description

Description
A DISHWASHER
[0001] The present invention relates to dishwashers wherein a program including the regeneration step is operated.
[0002] In a dishwasher, a washing program is implemented that is comprised of various steps such as pre-washing, main washing and rinsing. In these machines, the washing and/or drying performance is inversely proportional to the hardness level of the water. As is known, the hardness of water results from the dissolved positive calcium or magnesium ions (Ca++ and Mg++) contained therein. In order to decrease the hardness of water, the water used in washing is first passed through an ion exchanger, for example a resin. The ion exchanger absorbs these ions from the water and gives off sodium ions (Na+) instead. Consequently, the hardness of water is reduced. However, in time, the ion exchanger cannot absorb the calcium and magnesium ions anymore. Therefore from time to time the ion exchanger is kept in a salt compound (for example NaCI) to extract the calcium and magnesium ions and to become enriched in sodium ions again. This process is called regeneration. Determining the frequency of the regeneration process (every once washing) is important for the performance of the dishwasher. If the regeneration process is performed more frequently than required, then salt consumption will increase unnecessarily. And when the regeneration process is delayed, then calcium deposits will be formed on the washed dishes.
[0003] Sensors are used in the technique for performing the regeneration process in the correct frequency. The frequency of the regeneration is adjusted according to data received from the said sensor.
[0004] In the state of the art German Patent Application No DE19841568 a dishwasher is explained that comprises an electrical conductivity sensor that measures the electrical conductivity of water both before and after water is passed through the ion exchanger. The decision for regeneration is given by registering and comparing the difference with previous values of conductivity from earlier treatment cycles detected by the two sensors. If the said difference is below a threshold value then it is understood that the ion exchanger is not functioning properly and regeneration is performed.
[0005] In another implementation known in the technique, the state of the art European Patent Application No EP1252855, the explained dishwasher comprises a conductivity sensor that measures the conductivity of the ion exchanger. When to perform the regeneration process is determined according to the measured value.
[0006] However, in implementations known in the technique, in case data cannot be received from the sensor for determining when to perform regeneration for a reason such as malfunctioning of the said sensors or detachment of the electrical connections etc., the regeneration process cannot be performed at all and the washing performance of the machine is gradually reduced.
[0007] The aim of the present invention is the realization of a dishwasher wherein the regeneration process is performed at certain intervals even in the case that data cannot be received from the sensor that determines when to perform the regeneration process.
[0008] The dishwasher realized in order to attain the aim of the present invention is explicated in the attached claims.
[0009] In the dishwasher of the present invention, a sensor is used that determines whether or not a regeneration process is required. In case data cannot be received from the sensor, the frequency in which the regeneration process will be performed is determined by the frequency value stored in the memory of the control unit.
[0010] In an embodiment of the present invention, the frequency in which the regeneration process will be performed is recorded in the control unit according to the data received while the sensor operates trouble free and when data cannot be received from the sensor, regeneration process is continued according to these values. The frequency in which the regeneration process will be performed can be determined by methods such as using the last one of the previous recorded values, average of the values or the moving average of the last 5 values.
[0011] In another embodiment of the present invention, water hardness level is measured and according to this value the frequency value is recorded in the memory of the control unit during the installation of the dishwasher by the user or the after sale service personnel and when data cannot be received from the sensor the regeneration process is performed according to the said value.
[0012] In another embodiment of the present invention, when data cannot be received from the sensor, washing process continues but a warning is delivered to the user for informing the malfunction of the sensor.
[0013] The dishwasher realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
[0014] Figure 1 - is the schematic view of a dishwasher.
[0015] The elements illustrated in the figures are numbered as follows:
1. Dishwasher
2. Washing chamber
3. Ion exchanger
4. Salt chamber
5. Sensor
6. Control unit
[0016] 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.
[0017] The dishwasher (1) comprises a washing chamber (2) wherein the dishes to be washed are emplaced, an ion exchanger (3) that reduces the hardness of the water to be delivered into the washing chamber (2) and a salt chamber (4) containing the salt required for the regeneration of the ion exchanger (3), being in communication with the ion exchanger (3) (Figure
1)- [0018] In the dishwasher (1), the ion exchanger (3) cannot absorb the calcium and magnesium ions of the water passing therethrough anymore with the lapse of time. Therefore, from time to time the ion exchanger (3) is kept in a salt-water solution delivered from the salt chamber (4) to extract the calcium and magnesium ions and to enrich with the sodium ions again. This process is called regeneration. [0019] The dishwasher (1) comprises a sensor (5) that detects the ion exchanger (3) cannot absorb the calcium and magnesium ions of the water passing therethrough anymore and a control unit (6) that triggers the regeneration process in accordance with the data received from the sensor (5). The sensor (5), under normal work conditions, delivers data to the control unit (6) at the start of each washing process about whether or not the regeneration process will be performed.
[0020] The control unit (6) stores in the memory thereof a frequency of regeneration value (n) that is used to determine when the regeneration process will be performed in the case that data cannot be received from the sensor (5) due to a malfunction such as the electrical connection of the sensor (5) being detached or becoming inoperative. The control unit (6) performs the regeneration process periodically after a certain number (n) of washing programs in accordance with the recorded frequency of regeneration value (n) if data cannot be received from the sensor (5).
[0021] In an embodiment of the present invention, the frequency of regeneration value (n) is recorded in the memory of the control unit (6) during the installation of the dishwasher (1) by the user or the service personnel.
[0022] In another embodiment of the present invention, during the utilization of the dishwasher (1) the information relating to the performed frequency of the regeneration process in accordance with the data received from the sensor (5) is recorded in the control unit (6) as the frequency of regeneration value (n) and at each regeneration process this value is updated.
[0023] In another embodiment of the present invention, during the utilization of the dishwasher (1), the information relating to the performed frequency of regeneration process in accordance with the data received from the sensor (5) is recorded in the control unit (6) and the frequency of regeneration value (n) is determined by taking the average of the recorded data.
[0024] In yet another embodiment of the present invention, when regeneration process is performed according to the frequency of regeneration value (n) because data cannot be received from the sensor (5), the control unit (6) delivers a warning to the user for informing about the problem in the sensor (5). By means of the present invention, a dishwasher (1) is designed that continues to operate by performing regeneration at a certain frequency (n) even in the case that data cannot be received from the sensor (5) that determines when to perform the regeneration process without the intervention of the user or the service personnel.

Claims

Claims
1. A dishwasher (1 ) that comprises a washing chamber (2) wherein the dishes to be washed are emplaced, an ion exchanger (3) that reduces the hardness of the water delivered into the washing chamber (2), a salt chamber (4) containing the salt required for the regeneration of the ion exchanger (3), being in communication with the ion exchanger (3), a sensor (5) that detects the ion exchanger (3) cannot absorb the calcium and magnesium ions of the water passing therethrough anymore and a control unit (6) that triggers the regeneration process in accordance with the data received from the sensor (5) and characterized by a control unit (6) that determines when to perform the regeneration process according to a frequency of regeneration value (n) stored in the memory thereof in the case that data cannot be received from the sensor (5).
2. A dishwasher (1) as in Claim 1 , characterized in that the frequency of regeneration value (n) is stored in the control unit (6) by the user or the service personnel during installation.
3. A dishwasher (1) as in Claim 1 , characterized in that the control unit (6) uses the information relating to the frequency of the regeneration processes performed in the previous usages according to the data received from the sensor (5), as the frequency of regeneration value (n).
4. A dishwasher (1) as in Claim 1 , characterized in that the control unit (6) uses the average of the frequency values of the regeneration processes performed in the previous usages, according to the data received from the sensor (5), as the frequency of regeneration value (n).
5. A dishwasher (1) as in any one of the above claims, characterized in that the control unit (6) delivers a warning to the user for informing about the problem in the sensor (5) when data cannot be received from the sensor (5).
PCT/EP2008/058476 2007-07-02 2008-07-02 A dishwasher Ceased WO2009004019A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE602008002950T DE602008002950D1 (en) 2007-07-02 2008-07-02 DISHWASHER
PL08774617T PL2175767T3 (en) 2007-07-02 2008-07-02 A dishwasher
DK08774617.8T DK2175767T3 (en) 2007-07-02 2008-07-02 dishwasher
AT08774617T ATE483393T1 (en) 2007-07-02 2008-07-02 DISHWASHER
EP08774617A EP2175767B1 (en) 2007-07-02 2008-07-02 A dishwasher

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2007/04575 2007-07-02
TR200704575 2007-07-02

Publications (1)

Publication Number Publication Date
WO2009004019A1 true WO2009004019A1 (en) 2009-01-08

Family

ID=39721926

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/058476 Ceased WO2009004019A1 (en) 2007-07-02 2008-07-02 A dishwasher

Country Status (6)

Country Link
EP (1) EP2175767B1 (en)
AT (1) ATE483393T1 (en)
DE (1) DE602008002950D1 (en)
DK (1) DK2175767T3 (en)
PL (1) PL2175767T3 (en)
WO (1) WO2009004019A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2382908A1 (en) * 2010-04-01 2011-11-02 Electrolux Home Products Corporation N.V. A method for filling a wash tub of a dishwasher with water
WO2011113583A3 (en) * 2010-03-18 2011-11-10 Electrolux Home Products Corporation N.V. A method for filling a wash tub of a dishwasher with water
US8968483B2 (en) 2012-09-10 2015-03-03 Whirlpool Corporation Method of using liquid in a dishwasher
US9186034B2 (en) 2012-09-05 2015-11-17 Whirlpool Corporation Methods of reusing liquid in a dishwasher
US9192282B2 (en) 2010-12-14 2015-11-24 Whirlpool Corporation Dishwasher system with a reuse tank
US9516989B2 (en) 2010-12-14 2016-12-13 Whirlpool Corporation Dishwasher system with a reuse tank
US9839945B2 (en) 2014-05-02 2017-12-12 Electrolux Home Products, Inc. Methods, systems, and apparatuses for performing a quick cycle in a dishwasher
WO2020057833A1 (en) * 2018-09-21 2020-03-26 Arcelik Anonim Sirketi A dishwasher comprising a heat pump
DE102023115797A1 (en) 2022-06-29 2024-01-04 Röhm Gmbh Improved process for producing a polymer
EP4144277A4 (en) * 2020-04-30 2024-04-24 Sanhua Aweco Appliance Systems (Wuhu) Co., Ltd. Method and apparatus for controlling dishwasher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220011903A (en) 2020-07-22 2022-02-03 삼성전자주식회사 Dishwasher

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001030229A1 (en) * 1999-04-22 2001-05-03 Eltek S.P.A. Household appliance using water, namely a washing machine, with improved device for softening the water
DE10027844A1 (en) * 1999-12-18 2001-06-28 Aweco Appliance Sys Gmbh & Co Domestic machine has regeneratable ion exchanger with regeneration state with which soft water with defined degree of hardness can be directly delivered; regeneration states is controllable
WO2007074088A1 (en) * 2005-12-29 2007-07-05 Arcelik Anonim Sirketi A dishwasher

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001030229A1 (en) * 1999-04-22 2001-05-03 Eltek S.P.A. Household appliance using water, namely a washing machine, with improved device for softening the water
DE10027844A1 (en) * 1999-12-18 2001-06-28 Aweco Appliance Sys Gmbh & Co Domestic machine has regeneratable ion exchanger with regeneration state with which soft water with defined degree of hardness can be directly delivered; regeneration states is controllable
WO2007074088A1 (en) * 2005-12-29 2007-07-05 Arcelik Anonim Sirketi A dishwasher

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011113583A3 (en) * 2010-03-18 2011-11-10 Electrolux Home Products Corporation N.V. A method for filling a wash tub of a dishwasher with water
US9936852B2 (en) 2010-03-18 2018-04-10 Electrolux Home Products Corporation N.V. Method for filling a wash tub of a dishwasher with water
EP2382908A1 (en) * 2010-04-01 2011-11-02 Electrolux Home Products Corporation N.V. A method for filling a wash tub of a dishwasher with water
US11779190B2 (en) 2010-12-14 2023-10-10 Whirlpool Corporation Dishwasher system with a reuse tank
US9192282B2 (en) 2010-12-14 2015-11-24 Whirlpool Corporation Dishwasher system with a reuse tank
US9516989B2 (en) 2010-12-14 2016-12-13 Whirlpool Corporation Dishwasher system with a reuse tank
US10058225B2 (en) 2010-12-14 2018-08-28 Whirlpool Corporation Dishwasher system with a reuse tank
US9186034B2 (en) 2012-09-05 2015-11-17 Whirlpool Corporation Methods of reusing liquid in a dishwasher
US8968483B2 (en) 2012-09-10 2015-03-03 Whirlpool Corporation Method of using liquid in a dishwasher
US9839945B2 (en) 2014-05-02 2017-12-12 Electrolux Home Products, Inc. Methods, systems, and apparatuses for performing a quick cycle in a dishwasher
WO2020057833A1 (en) * 2018-09-21 2020-03-26 Arcelik Anonim Sirketi A dishwasher comprising a heat pump
EP4144277A4 (en) * 2020-04-30 2024-04-24 Sanhua Aweco Appliance Systems (Wuhu) Co., Ltd. Method and apparatus for controlling dishwasher
DE102023115797A1 (en) 2022-06-29 2024-01-04 Röhm Gmbh Improved process for producing a polymer

Also Published As

Publication number Publication date
PL2175767T3 (en) 2011-01-31
DK2175767T3 (en) 2011-01-31
DE602008002950D1 (en) 2010-11-18
ATE483393T1 (en) 2010-10-15
EP2175767A1 (en) 2010-04-21
EP2175767B1 (en) 2010-10-06

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