EP0864684A1 - Vorrichtung, Verfahren und Steuerungsvorrichtung zum Dosieren von Waschmittel - Google Patents

Vorrichtung, Verfahren und Steuerungsvorrichtung zum Dosieren von Waschmittel Download PDF

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Publication number
EP0864684A1
EP0864684A1 EP98200506A EP98200506A EP0864684A1 EP 0864684 A1 EP0864684 A1 EP 0864684A1 EP 98200506 A EP98200506 A EP 98200506A EP 98200506 A EP98200506 A EP 98200506A EP 0864684 A1 EP0864684 A1 EP 0864684A1
Authority
EP
European Patent Office
Prior art keywords
mixing chamber
detergent
washing device
washing
supply
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
EP98200506A
Other languages
English (en)
French (fr)
Other versions
EP0864684B1 (de
Inventor
Willi G. Seitz
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.)
Diversey IP International BV
Original Assignee
Unilever PLC
Unilever NV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8228086&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0864684(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Priority to EP98200506A priority Critical patent/EP0864684B1/de
Publication of EP0864684A1 publication Critical patent/EP0864684A1/de
Application granted granted Critical
Publication of EP0864684B1 publication Critical patent/EP0864684B1/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
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/37—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of metering of detergents or additives
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • D06F2103/22—Content of detergent or additives

Definitions

  • the present invention relates to a system and a method for dosing detergent to a washing device.
  • the invention relates to a detergent dosing system, comprising a mixing chamber for mixing the detergent with a solvent.
  • dosing apparatus such as worm or screw elements of which the amount of powder dosed per unit time is known.
  • worm element By driving such a worm element for a predetermined time period, a certain amount of washing powder can be added to the liquid flowing into a washing machine.
  • detergent dosing systems which include a mixing chamber for mixing detergent and water and thus preparing an aqueous solution or dispersion of the detergent.
  • US-A-3,570,717 discloses a system for automatically preparing an aqueous dispersion of difficult-to-solubilize, solid detergent material and delivering the dispersion to one or more washing machines.
  • Said system comprises means for separately delivering water and detergent to a mixing tank until the weight of this tank reaches a predetermined value. When this value is reached, the feed of the detergent is automatically shut-off.
  • the system according to this document further comprises means for transfering the detergent-water mix from the mixing tank to a storage vessel, until the liquid level in the mixing tank falls below a predetermined level, whereby valves are automatically re-opened for effecting the introduction of water and detergent once again into the mixing tank.
  • US-A-3,570,717 describes a system wherein only the weight of the detergent dispersion in the mixing tank is measured, there being no actual feedback of the amount of detergent fed into the one or more washing machines. As a consequence, it cannot be ensured that the correct amount of detergent is supplied to the washing machines.
  • the present invention provides a system for dosing detergent to a washing process, comprising:
  • the invention provides a method for dosing a detergent to a washing process, wherein a system according to the invention is applied.
  • the invention relates to a control device suitable for a system of the present invention.
  • the concentration of detergent in the mixing chamber is accurately determined whereby it is ensured that the correct amount of detergent is supplied to the washing device.
  • the system is preferably provided with a number of sensors for controlling the supply and the drainage of water and water with dissolved detergent respectively, in order to supply water and detergent when a low level is present and in order to set the desired concentration in the mixing chamber following a high level.
  • the difference in level of the low level sensor and the high level sensor preferably has a value of about 10-25% of the overall content of the mixing chamber.
  • the dose controlling unit according to the invention is connected to the washing device, which controls a pump and is preferably connected to a flow meter for measuring the amount of fluid wherein detergent is dissolved.
  • the present invention furthermore provides a method and a control device.
  • a preferred embodiment of a system 1 according to the present invention comprises a washing machine 2, a supply holder for washing powder 3 and a mixing chamber 4 for washing powder and water which is connected by a conduit 5 to the washing machine 2.
  • a dosing element such as a worm 6 for washing powder, is driven by a motor 7, which is electrically connected to a control circuit 8. Furthermore a level switch 9 is connected to the control circuit 8 for measuring the level of the washing powder in the holder 3.
  • a water supply conduit 10 is connected to the mixing chamber 4 wherein a closure valve 11 as well a control valve 12 are arranged, which control valve 12 can be regulated either manually or via the control circuit 8.
  • a stirrer 13 is connected to the control circuit 8 for stirring the water with washing powder in the mixing chamber 4.
  • a concentration meter for example a conduction meter 14, which is also connected to the control circuit 8, is for example arranged in the mixing chamber 4.
  • a low level sensor 15, a high level sensor 16, and an overflow sensor 17 are furthermore connected to the control circuit 8.
  • a pump 20 is arranged in the conduit 5 of the washing device 2 in the present preferred embodiment, as well as a flow meter 21, which are both connected to a dose control circuit 22 which is connected to the control circuit 8 and the washing machine 2.
  • the closure valve 11 for example a magnetic valve
  • motor 7 is activated and washing powder is supplied to the mixing chamber 4.
  • the water supply should be large enough to avoid an overconcentration of detergent in the solution, i.e. that more water should flow per unit time than the proportional amount of detergent soluble in this amount of water. This sufficiently large water supply is achieved by the correct adjustment of the control valve 12.
  • the stirrer can be switched off.
  • the sensor 17 signals a too high water level in the mixing chamber 4 by means of an alarm, for example, associated with the control circuit 8.
  • water and subsequently detergent are again supplied thereto in the manner described above, as long as the low level sensor 15 signals that the water level has dropped below this low level.
  • the concentration in the mixing chamber 4 is sufficiently constant, the levels as determined by the sensors 15 and 17 are close enough to each other that the water or solution volume in the mixing chamber between these levels roughly corresponds with 10-25% of the total volume of the mixing chamber, i.e. filled to the level of the high level sensor 16.
  • a dosing control circuit is associated with the washing device.
  • a motor for pump 20 as well as an outlet for the flow meter 21 is connected to the dose control circuit 22.
  • the preferred embodiment shown in Figure 2 of the dose control device 22 works as follows, referring to Figs. 3A-3E.
  • the voltage V as dosing signal in the washing device 2 starts a pulse train with a frequency f in the transformer 31 (see Fig. 3B).
  • a pulse multiplier 32 is connected to the transformer 31 which multiplies the amount of pulses by a factor of 2 for example.
  • a memory element 33 is connected to the multiplier 32, whereby an output of the memory element 33 is connected to a first output of a comparator 34.
  • the flow meter 21 is furthermore connected via a calibration unit 35 to a second memory element 36.
  • the calibration unit 35 attunes the pulses from the units 31-33 to those of the flow meter 21.
  • the pump 20 is switched off since the desired amount of detergent for the washing process has been reached (see fig. 3C-3E).
  • the magnitude of voltage V can be dependent on the required dosage of detergent, e.g. the level of cleaning required for e.g. textile.
  • the pulse multiplier is included in the circuit to make dosing of the solution of detergent in water less time critical, so that even if the pump doses less detergent per time unit than expected, such dosing will be executed sufficiently in the available time period.
  • the dosing control unit 22 By means of the dosing control unit 22, it can be determined whether the pump 20 realizes an insufficient fluid flow per time unit whereby it can be determined that the pump 20 is in need of maintenance.
  • the present invention is not limited to the above described preferred embodiments thereof; the requested rights are in first instance determined by the following claims.
EP98200506A 1997-03-07 1998-02-17 Vorrichtung, Verfahren und Steuerungsvorrichtung zum Dosieren von Waschmittel Expired - Lifetime EP0864684B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98200506A EP0864684B1 (de) 1997-03-07 1998-02-17 Vorrichtung, Verfahren und Steuerungsvorrichtung zum Dosieren von Waschmittel

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP97200693 1997-03-07
EP97200693 1997-03-07
EP98200506A EP0864684B1 (de) 1997-03-07 1998-02-17 Vorrichtung, Verfahren und Steuerungsvorrichtung zum Dosieren von Waschmittel

Publications (2)

Publication Number Publication Date
EP0864684A1 true EP0864684A1 (de) 1998-09-16
EP0864684B1 EP0864684B1 (de) 2001-12-12

Family

ID=8228086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98200506A Expired - Lifetime EP0864684B1 (de) 1997-03-07 1998-02-17 Vorrichtung, Verfahren und Steuerungsvorrichtung zum Dosieren von Waschmittel

Country Status (3)

Country Link
EP (1) EP0864684B1 (de)
DE (1) DE69802857T2 (de)
ES (1) ES2169893T3 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7390467B2 (en) 2003-05-02 2008-06-24 Ecolab Inc. Dispensing apparatus and method suitable for heterogeneous composition
US7402291B2 (en) 2003-05-02 2008-07-22 Ecolab Inc. Dispensing apparatus and method suitable for heterogeneous composition
US8266748B2 (en) 2008-07-01 2012-09-18 Whirlpool Corporation Apparatus and method for controlling bulk dispensing of wash aid by sensing wash aid concentration
EP2540902A1 (de) 2011-06-30 2013-01-02 Electrolux Home Products Corporation N.V. Waschmaschine
US8388695B2 (en) 2008-07-01 2013-03-05 Whirlpool Corporation Apparatus and method for controlling laundering cycle by sensing wash aid concentration
US8397328B2 (en) 2008-07-01 2013-03-19 Whirlpool Corporation Apparatus and method for controlling concentration of wash aid in wash liquid
US9534336B2 (en) 2011-10-06 2017-01-03 Whirlpool Corporation Dispensing treating chemistry in a laundry treating appliance
WO2018099671A1 (en) * 2016-12-01 2018-06-07 Arcelik Anonim Sirketi A dishwasher with improved detergent effectiveness
CN111304881A (zh) * 2020-03-02 2020-06-19 珠海格力电器股份有限公司 洗涤液盒、洗衣机、洗涤液液位检测及降低粘稠度的方法
JP2020108699A (ja) * 2019-01-07 2020-07-16 東芝ライフスタイル株式会社 衣類処理装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007041643A1 (de) * 2007-09-03 2009-03-12 Lothar Ernst Wilhelm Weber Waschmaschine, Reinigungseinrichtung, Verfahren zum Waschen und Spülmaschine, u.a.
DE102017111332B4 (de) 2017-03-20 2022-02-24 Schulz Gmbh Vorrichtung und Verfahren zum Dosieren von Desinfektions- und/oder Reinigungsmitteln

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570717A (en) * 1969-01-08 1971-03-16 Stauffer Chemical Co System for fluent material dispensing with electrical controls
US4285352A (en) * 1979-09-12 1981-08-25 Hobart Corporation Continuous duty chemically sanitizing batch rinse system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570717A (en) * 1969-01-08 1971-03-16 Stauffer Chemical Co System for fluent material dispensing with electrical controls
US4285352A (en) * 1979-09-12 1981-08-25 Hobart Corporation Continuous duty chemically sanitizing batch rinse system

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7390467B2 (en) 2003-05-02 2008-06-24 Ecolab Inc. Dispensing apparatus and method suitable for heterogeneous composition
US7402291B2 (en) 2003-05-02 2008-07-22 Ecolab Inc. Dispensing apparatus and method suitable for heterogeneous composition
US10066331B2 (en) 2008-07-01 2018-09-04 Whirlpool Corporation Apparatus and method for controlling laundering cycle by sensing wash aid concentration
US8397328B2 (en) 2008-07-01 2013-03-19 Whirlpool Corporation Apparatus and method for controlling concentration of wash aid in wash liquid
US8266748B2 (en) 2008-07-01 2012-09-18 Whirlpool Corporation Apparatus and method for controlling bulk dispensing of wash aid by sensing wash aid concentration
US8388695B2 (en) 2008-07-01 2013-03-05 Whirlpool Corporation Apparatus and method for controlling laundering cycle by sensing wash aid concentration
CN103764894A (zh) * 2011-06-30 2014-04-30 伊莱克斯家用产品股份有限公司 洗衣机
EP2540902A1 (de) 2011-06-30 2013-01-02 Electrolux Home Products Corporation N.V. Waschmaschine
US20140165663A1 (en) * 2011-06-30 2014-06-19 Electrolux Home Products Corporation N.V. Laundry Washing Machine
AU2012277902B2 (en) * 2011-06-30 2015-01-29 Electrolux Home Products Corporation N.V. Laundry washing machine
RU2594962C2 (ru) * 2011-06-30 2016-08-20 Электролюкс Хоум Продактс Корпорейшн Н.В. Стиральная машина
WO2013000914A1 (en) 2011-06-30 2013-01-03 Electrolux Home Products Corporation N.V. Laundry washing machine
US9637857B2 (en) 2011-06-30 2017-05-02 Electrolux Home Products Corporation N.V. Laundry washing machine
US9890493B2 (en) 2011-10-06 2018-02-13 Whirlpool Corporation Dispensing treating chemistry in a laundry treating appliance
US9534336B2 (en) 2011-10-06 2017-01-03 Whirlpool Corporation Dispensing treating chemistry in a laundry treating appliance
US10385499B2 (en) 2011-10-06 2019-08-20 Whirlpool Corporation Dispensing treating chemistry in a laundry treating appliance
US10837135B2 (en) 2011-10-06 2020-11-17 Whirlpool Corporation Dispensing treating chemistry in a laundry treating appliance
US11560666B2 (en) 2011-10-06 2023-01-24 Whirlpool Corporation Dispensing treating chemistry in a laundry treating appliance
WO2018099671A1 (en) * 2016-12-01 2018-06-07 Arcelik Anonim Sirketi A dishwasher with improved detergent effectiveness
JP2020108699A (ja) * 2019-01-07 2020-07-16 東芝ライフスタイル株式会社 衣類処理装置
CN111304881A (zh) * 2020-03-02 2020-06-19 珠海格力电器股份有限公司 洗涤液盒、洗衣机、洗涤液液位检测及降低粘稠度的方法
CN111304881B (zh) * 2020-03-02 2023-10-13 珠海格力电器股份有限公司 洗涤液盒、洗衣机、洗涤液液位检测及降低粘稠度的方法

Also Published As

Publication number Publication date
EP0864684B1 (de) 2001-12-12
DE69802857T2 (de) 2002-06-13
DE69802857D1 (de) 2002-01-24
ES2169893T3 (es) 2002-07-16

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