EP0864684A1 - System, method and control device for dosing detergent - Google Patents
System, method and control device for dosing detergent Download PDFInfo
- 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
Links
Images
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.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Accessories For Mixers (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Detergent Compositions (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
- a washing device (2) wherein the washing process takes place;
- a supply holder (3) for the detergent;
- a mixing chamber (4) for mixing the detergent with a solvent in a predetermined concentration range;
- measuring means (14) for measuring the concentration in the mixing chamber; and
- control means for controlling the supply of at
least a part of the content of the mixing chamber to the
washing device,
wherein the system is provided with a dose controlling unit (22) which is connected to the control means and to the washing device.
Description
- a washing device wherein the washing process takes place;
- a supply holder for detergent;
- a mixing chamber for mixing the detergent with a solvent (preferably water) in a predeterment concentration range;
- measuring means for measuring the concentration in the mixing chamber; and
- control means for supplying at least a part of the content of the mixing chamber to the washing device, wherein the system is provided with a dose controlling unit which is connected to the control means and to the washing machine.
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.
Claims (12)
- System for dosing detergent to a washing process, comprising:a washing device (2) wherein the washing process takes place;a supply holder (3) for the detergent;a mixing chamber (4) for mixing the detergent with a solvent in a predetermined concentration range;measuring means (14) for measuring the concentration in the mixing chamber; andcontrol means for controlling the supply of at least a part of the content of the mixing chamber to the washing device,
wherein the system is provided with a dose controlling unit (22) which is connected to the control means (8) and to the washing device (2). - System according to claim 1, wherein a control unit (8) forms part of the control means (8), which control unit is connected to a closure valve (11) for the supply of the solvent and to a motor (7) for driving a detergent supply element (6) from the supply holder (3).
- System according to claim 1 or 2, wherein the mixing chamber (4) is provided with a low level sensor (15) for sensing a relatively low level of the content of the mixing chamber, which low level sensor is connected to the control unit (8).
- System according to claim 1, 2 or 3, provided with a high level sensor (16) for sensing a relatively high fluid level in the mixing chamber, which high level sensor is connected to the control unit (8).
- System according to any of the claims 1-4, provided with an overflow sensor (17) for sensing an excess level in the mixing chamber, which overflow sensor is connected to the control unit (8).
- Systems according to any of the claims 1-5, provided with an adjustable valve (12) in the supply conduit for the solvent, the flow opening of the valve being adjustable.
- System according to any of the claims 1-6, provided with a flow meter (21) in the conduit (5) between the mixing chamber (4) and the washing device (2).
- System according claim 7 , wherein the dose controlling unit (22) is connected to a pump (20) in the conduit (5) between the mixing chamber (4) and the washing device (2) and wherein a comparator (34) makes up part of the dose controlling unit (22) for comparing the amount of detergent set through the washing device with the amount of fluid measured by the flow meter (21).
- System according to any of the claims 1-8, wherein the dosing control unit (22) is suited for providing a signal if the pump working of the pump (20) in the conduit between the mixing chamber and the washing device is insufficient.
- Method for dosing a detergent to a washing process, wherein a system according to any of the claims 1-9 is applied.
- Method according to claim 10, wherein the detergent is powdery and the solvent is water.
- Control device suitable for a system according to any of the claims 1-9 and a method according to claims 10 of 11.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98200506A EP0864684B1 (en) | 1997-03-07 | 1998-02-17 | System, method and control device for dosing detergent |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97200693 | 1997-03-07 | ||
EP97200693 | 1997-03-07 | ||
EP98200506A EP0864684B1 (en) | 1997-03-07 | 1998-02-17 | System, method and control device for dosing detergent |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0864684A1 true EP0864684A1 (en) | 1998-09-16 |
EP0864684B1 EP0864684B1 (en) | 2001-12-12 |
Family
ID=8228086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98200506A Expired - Lifetime EP0864684B1 (en) | 1997-03-07 | 1998-02-17 | System, method and control device for dosing detergent |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0864684B1 (en) |
DE (1) | DE69802857T2 (en) |
ES (1) | ES2169893T3 (en) |
Cited By (10)
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 (en) | 2011-06-30 | 2013-01-02 | Electrolux Home Products Corporation N.V. | Laundry washing machine |
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 (en) * | 2020-03-02 | 2020-06-19 | 珠海格力电器股份有限公司 | Washing liquid box, washing machine and method for detecting liquid level of washing liquid and reducing viscosity |
JP2020108699A (en) * | 2019-01-07 | 2020-07-16 | 東芝ライフスタイル株式会社 | Clothing treatment apparatus |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007041643A1 (en) * | 2007-09-03 | 2009-03-12 | Lothar Ernst Wilhelm Weber | Washing machine, particularly conventional household washing machine, particularly for use in commercial purposes, has multiple containers, where different active ingredients are arranged for mixing active ingredient combination |
DE102017111332B4 (en) | 2017-03-20 | 2022-02-24 | Schulz Gmbh | Device and method for dosing disinfectants and/or cleaning agents |
Citations (2)
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 |
-
1998
- 1998-02-17 DE DE69802857T patent/DE69802857T2/en not_active Expired - Lifetime
- 1998-02-17 EP EP98200506A patent/EP0864684B1/en not_active Expired - Lifetime
- 1998-02-17 ES ES98200506T patent/ES2169893T3/en not_active Expired - Lifetime
Patent Citations (2)
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)
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 (en) * | 2011-06-30 | 2014-04-30 | 伊莱克斯家用产品股份有限公司 | Laundry washing machine |
EP2540902A1 (en) | 2011-06-30 | 2013-01-02 | Electrolux Home Products Corporation N.V. | Laundry washing machine |
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 (en) * | 2011-06-30 | 2016-08-20 | Электролюкс Хоум Продактс Корпорейшн Н.В. | Washing machine |
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 (en) * | 2019-01-07 | 2020-07-16 | 東芝ライフスタイル株式会社 | Clothing treatment apparatus |
CN111304881A (en) * | 2020-03-02 | 2020-06-19 | 珠海格力电器股份有限公司 | Washing liquid box, washing machine and method for detecting liquid level of washing liquid and reducing viscosity |
CN111304881B (en) * | 2020-03-02 | 2023-10-13 | 珠海格力电器股份有限公司 | Washing liquid box, washing machine, washing liquid level detection and viscosity reduction method |
Also Published As
Publication number | Publication date |
---|---|
DE69802857D1 (en) | 2002-01-24 |
DE69802857T2 (en) | 2002-06-13 |
EP0864684B1 (en) | 2001-12-12 |
ES2169893T3 (en) | 2002-07-16 |
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