WO2007074088A1 - A dishwasher - Google Patents

A dishwasher Download PDF

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Publication number
WO2007074088A1
WO2007074088A1 PCT/EP2006/069791 EP2006069791W WO2007074088A1 WO 2007074088 A1 WO2007074088 A1 WO 2007074088A1 EP 2006069791 W EP2006069791 W EP 2006069791W WO 2007074088 A1 WO2007074088 A1 WO 2007074088A1
Authority
WO
WIPO (PCT)
Prior art keywords
washing
dishwasher
amount
salt
rinsing aid
Prior art date
Application number
PCT/EP2006/069791
Other languages
French (fr)
Inventor
Atilla Uz
Tansel Kibar
Ertan Cetinkaya
Ayla Kuran
Original Assignee
Arcelik Anonim Sirketi
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 Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2007074088A1 publication Critical patent/WO2007074088A1/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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
    • 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
    • A47L2401/02—Consumable products information, e.g. information on detergent, rinsing aid or salt; Dispensing device information, e.g. information on the type, e.g. detachable, or status of the device
    • A47L2401/023—Quantity or concentration of the consumable product
    • 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
    • A47L2501/07—Consumable products, e.g. detergent, rinse aids or salt

Definitions

  • the present invention relates to a dishwasher that provides an effective washing particularly in regions where water hardness is high.
  • rinsing aids are used alongside the detergent in order to increase the washing effectiveness during the washing process.
  • the rinsing aid forms a thin film layer on the washed items. This layer provides the water to easily flow over the items by reducing its surface tension. The dirt particles that might stay in the rinsing water are removed with water without clinging to the suriace of the washed items by using the rinsing aid.
  • the rinsing aid in the dishwashers is automatically dosaged by the state-of-the-art automatic dosage unit and is delivered to the washing tub.
  • the rinsing aid prevents the water spots from being left on the items to be washed.
  • the amount of rinsing aid delivered into the washing tub is changed depending on parameters like the hardness of water, the preferences of the user etc.
  • the washing and/or drying performances are inversely proportional to the hardness degree of the water.
  • the water used for washing is first passed over an ion exchanger, e.g. resin, and the hardness of the water is reduced.
  • the ion exchanger can no longer absorb the calcium and magnesium ions. Therefore the ion exchanger is kept in a salt compound from time to time that provides to remove the calcium and magnesium ions and to enrich with sodium ions again. This process is called regeneration.
  • the hardness of the water from the main supply is measured and the regeneration adjustment of the machine is made accordingly, determining the frequency of the regeneration process.
  • the high hardness of the main supply water results in stains of lime and water left on the washed items and does not meet the expectations of the user.
  • the softening of the main supply of water cannot be at the desired level particularly in regions with a very high water hardness and this results in the ineffective utilization of the rinsing aid.
  • the object of the present invention is the realization of a dishwasher wherein the formation of lime and water marks on the washed items is prevented and the drying performance is improved.
  • the dishwasher realized in order to fulfill the objectives of the present invention, explicated in the first claim and dependent claims thereof, comprises a control unit that provides a larger amount of rinsing aid than the amount adjusted by the user, to be delivered to the washing tub by the dosage unit if the salt quantity used in the regeneration process is lower than a certain level or if the salt is finished.
  • the dishwasher is continued to be used when the salt amount fills below a certain level, the spots of lime and water that remain on the washed items is prevented and the drying performance of the dishwasher is enhanced.
  • Rgure 1 - is the schematic view of a dishwasher.
  • the dishwasher (1) of the present invention comprises a washing tub (2) wherein items to be washed are emplaced, a dosage unit (3) that delivers the washing agent and the rinsing aid to the washing tub (2) in the washing cycles made up of various steps such as pre -washing, main washing, rinsing, a salt chamber (4) into which the salt used in the regeneration process is put, and a control unit (5) that maintains the control of the dosage unit (3) and amount of salt (Rgure 1).
  • the control unit (5) provides a larger amount of rinsing aid (X+AX) than the amount (X) adjusted by the user to be delivered into the washing tub (2) by means of the dosage unit (3) when the salt amount remaining in the salt chamber (4) fills below a certain level.
  • control unit (5) increases the amount of the rinsing aid used after more than one washing process and provides to deliver to the washing tub (2) by the dosage unit (3) when the regeneration adjustment is selected to be at the lowest level and when the salt amount fills below a certain level.
  • the regeneration adjustment since the regeneration adjustment is at the lowest level, the increase of the rinsing aid amount is delayed because the reduction of the salt amount is expected to have adverse effects on the washing performance only after a couple of washing processes.
  • control unit (5) provides a larger amount of rinsing aid (X+AX) than the amount (X) adjusted by the user to be delivered into the washing tub (2) by means of the dosage unit (3) if the regeneration adjustment is set to the highest position.
  • the control unit (5) provides a larger amount of rinsing aid (X+AX) than the amount (X) adjusted by the user to be delivered into the washing tub (2) by means of the dosage unit (3) if the regeneration adjustment is set to the highest position whereat the regeneration process is done most frequently.
  • control unit (5) informs and warns the user about the salt level by means of a display.
  • the effective use of the rinsing aid is provided by the user when the salt level of the dishwasher (1) drops to an inadequate level or when the main supply water cannot be softened as desired in regions with a high water hardness level.

Abstract

The present invention relates to a dishwasher wherein effective use of the rinsing aid is provided by the user when the salt level of the dishwasher (1) is at an inadequate level or when the softening of the main supply water is not at the desired rate in regions with a high water hardness level.

Description

Description A DISHWASHER
[0001] The present invention relates to a dishwasher that provides an effective washing particularly in regions where water hardness is high.
[0002] In all of the state-of-the-art dishwashers, supplementary cleaning agents called rinsing aids are used alongside the detergent in order to increase the washing effectiveness during the washing process. The rinsing aid forms a thin film layer on the washed items. This layer provides the water to easily flow over the items by reducing its surface tension. The dirt particles that might stay in the rinsing water are removed with water without clinging to the suriace of the washed items by using the rinsing aid.
[0003] The rinsing aid in the dishwashers is automatically dosaged by the state-of-the-art automatic dosage unit and is delivered to the washing tub. The rinsing aid prevents the water spots from being left on the items to be washed. The amount of rinsing aid delivered into the washing tub is changed depending on parameters like the hardness of water, the preferences of the user etc.
[0004] In dishwashers, the washing and/or drying performances are inversely proportional to the hardness degree of the water. In order to decrease the hardness of water, the water used for washing is first passed over an ion exchanger, e.g. resin, and the hardness of the water is reduced. However, in time, the ion exchanger can no longer absorb the calcium and magnesium ions. Therefore the ion exchanger is kept in a salt compound from time to time that provides to remove the calcium and magnesium ions and to enrich with sodium ions again. This process is called regeneration.
[0005] When the dishwasher is set up, the hardness of the water from the main supply is measured and the regeneration adjustment of the machine is made accordingly, determining the frequency of the regeneration process. The high hardness of the main supply water results in stains of lime and water left on the washed items and does not meet the expectations of the user. The softening of the main supply of water cannot be at the desired level particularly in regions with a very high water hardness and this results in the ineffective utilization of the rinsing aid.
[0006] In state-of-the-art Great Britain Patent Application no. GB2052251, a description is given for a method of measuring the suriace tension and/or the water hardness and/or the electrical conductivity and/or the pH value of the washing liquid for the machine, and regulating the volume of water supplied to the machine and/or the number of changes of such water, and/or the metering of the washing agent in dependence on the measurement(s) made.
[0007] In another state-of-the-art document, the United States of America Patent no.
US5681400, a description is given for a washing machine wherein the washing agent and the additive are controlled at certain time intervals and the amounts are kept at a certain level.
[0008] When the user keeps on using the dishwasher when the salt is under a determined level or is finished, lime and water marks form on the washed load after the washing process.
[0009] The object of the present invention is the realization of a dishwasher wherein the formation of lime and water marks on the washed items is prevented and the drying performance is improved.
[0010] The dishwasher realized in order to fulfill the objectives of the present invention, explicated in the first claim and dependent claims thereof, comprises a control unit that provides a larger amount of rinsing aid than the amount adjusted by the user, to be delivered to the washing tub by the dosage unit if the salt quantity used in the regeneration process is lower than a certain level or if the salt is finished.
[0011] In the embodiment of the present invention, there is no need to do any measurements or use any sensors to determine the amount of the rinsing aid. Since sensors are not used, adversities stemming from measurement and evaluation errors are averted, control of the rinsing aid addition is made easier and cost advantage is provided.
[0012] By way of the present invention, if the dishwasher is continued to be used when the salt amount fills below a certain level, the spots of lime and water that remain on the washed items is prevented and the drying performance of the dishwasher is enhanced.
[0013] The dishwasher realized in order to fulfill the objectives of the present invention is illustrated in the attached figures, where:
[0014] Rgure 1 - is the schematic view of a dishwasher.
[0015] Elements shown in figures are numbered as follows:
1. Dishwasher
2. Washing tub
3. Dosage unit
4. Salt chamber
5. Control unit
[0016] The dishwasher (1) of the present invention comprises a washing tub (2) wherein items to be washed are emplaced, a dosage unit (3) that delivers the washing agent and the rinsing aid to the washing tub (2) in the washing cycles made up of various steps such as pre -washing, main washing, rinsing, a salt chamber (4) into which the salt used in the regeneration process is put, and a control unit (5) that maintains the control of the dosage unit (3) and amount of salt (Rgure 1).
[0017] The control unit (5) provides a larger amount of rinsing aid (X+AX) than the amount (X) adjusted by the user to be delivered into the washing tub (2) by means of the dosage unit (3) when the salt amount remaining in the salt chamber (4) fills below a certain level.
[0018] By this embodiment, even if the dishwasher (1) is continued to be utilized by the user when the salt reaches an inadequate level, the washing and the drying processes can still be carried out effectively by the dishwasher (1) for a certain period of time.
[0019] In another embodiment of the present invention, the control unit (5) increases the amount of the rinsing aid used after more than one washing process and provides to deliver to the washing tub (2) by the dosage unit (3) when the regeneration adjustment is selected to be at the lowest level and when the salt amount fills below a certain level. In this embodiment, since the regeneration adjustment is at the lowest level, the increase of the rinsing aid amount is delayed because the reduction of the salt amount is expected to have adverse effects on the washing performance only after a couple of washing processes.
[0020] In another embodiment of the present invention, the control unit (5) provides a larger amount of rinsing aid (X+AX) than the amount (X) adjusted by the user to be delivered into the washing tub (2) by means of the dosage unit (3) if the regeneration adjustment is set to the highest position.
[0021] When the dishwasher (1) is set up by the service operator, the hardness of the water from the main supply that is connected to the dishwasher (1) is measured and the frequency of the regeneration process is determined by setting the regeneration adjustment of the machine accordingly. In this embodiment, the regeneration adjustment is set to the highest position in regions with a high water hardness to provide the regeneration process to be done frequently. The control unit (5) provides a larger amount of rinsing aid (X+AX) than the amount (X) adjusted by the user to be delivered into the washing tub (2) by means of the dosage unit (3) if the regeneration adjustment is set to the highest position whereat the regeneration process is done most frequently.
[0022] In all the embodiments of the present invention, the control unit (5) informs and warns the user about the salt level by means of a display.
[0023] By way of the present invention, the effective use of the rinsing aid is provided by the user when the salt level of the dishwasher (1) drops to an inadequate level or when the main supply water cannot be softened as desired in regions with a high water hardness level.

Claims

Claims
[0001] A dishwasher (1) comprising a washing tub (2) wherein items to be washed are emplaced, a dosage unit (3) that delivers the washing agent and the rinsing aid that helps in washing to the washing tub (2) in the washing cycles made up of various steps such as pre-washing, main washing, rinsing, a salt chamber (4) into which the salt used in the regeneration process is put, and characterized by a control unit (5) that provides a larger amount of rinsing aid (X+ AX) than the amount (X) adjusted by the user to be delivered into the washing tub (2) by means of the dosage unit (3) when the salt amount remaining in the salt chamber (4) falls below a certain level.
[0002] A dishwasher (1) as in Claim 1, characterized by a control unit (5) that provides to increase the rinsing aid amount used after more than one washing process and delivers to the washing tub (2) by means of the dosage unit (3) when the regeneration adjustment is selected to be at the lowest level and when the salt amount falls below a certain level.
[0003] A dishwasher (1) as in Claim 1, characterized by a control unit (5) that provides a larger amount of rinsing aid (X+ AX) than the amount (X) adjusted by the user to be delivered into the washing tub (2) by means of the dosage unit (3) if the regeneration adjustment is set to the highest psitiαi whereat the regeneration process is done most frequently.
PCT/EP2006/069791 2005-12-29 2006-12-18 A dishwasher WO2007074088A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2005/05316 2005-12-29
TR200505316 2005-12-29

Publications (1)

Publication Number Publication Date
WO2007074088A1 true WO2007074088A1 (en) 2007-07-05

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PCT/EP2006/069791 WO2007074088A1 (en) 2005-12-29 2006-12-18 A dishwasher

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TR (1) TR200803986T1 (en)
WO (1) WO2007074088A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009004019A1 (en) * 2007-07-02 2009-01-08 Arcelik Anonim Sirketi A dishwasher

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2052251A (en) * 1979-05-03 1981-01-28 Licentia Gmbh Method of controlling the operation of an automatic washing machine
US5681400A (en) * 1992-03-12 1997-10-28 Ecolab Inc. Self-optimizing detergent controller for controlling variable additive concentration level in a warewashing machine
US20040122555A1 (en) * 2002-12-24 2004-06-24 Howes Ronald Bruce Dispenser having multiple modes of operation
US20050126602A1 (en) * 2002-08-21 2005-06-16 Bsh Bosch Und Siemens Hausgerate, Gmbh Method for adapting a rinsing program in a dishwasher machine, and corresponding dishwasher machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2052251A (en) * 1979-05-03 1981-01-28 Licentia Gmbh Method of controlling the operation of an automatic washing machine
US5681400A (en) * 1992-03-12 1997-10-28 Ecolab Inc. Self-optimizing detergent controller for controlling variable additive concentration level in a warewashing machine
US20050126602A1 (en) * 2002-08-21 2005-06-16 Bsh Bosch Und Siemens Hausgerate, Gmbh Method for adapting a rinsing program in a dishwasher machine, and corresponding dishwasher machine
US20040122555A1 (en) * 2002-12-24 2004-06-24 Howes Ronald Bruce Dispenser having multiple modes of operation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009004019A1 (en) * 2007-07-02 2009-01-08 Arcelik Anonim Sirketi A dishwasher

Also Published As

Publication number Publication date
TR200803986T1 (en) 2008-11-21

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