EP2209937A1 - Method for treating laundry in a household washing machine having a foam-forming float - Google Patents
Method for treating laundry in a household washing machine having a foam-forming floatInfo
- Publication number
- EP2209937A1 EP2209937A1 EP08846270A EP08846270A EP2209937A1 EP 2209937 A1 EP2209937 A1 EP 2209937A1 EP 08846270 A EP08846270 A EP 08846270A EP 08846270 A EP08846270 A EP 08846270A EP 2209937 A1 EP2209937 A1 EP 2209937A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- foam
- amount
- added
- washing
- drum
- 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
- 238000005406 washing Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 29
- 239000006260 foam Substances 0.000 claims abstract description 77
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000004872 foam stabilizing agent Substances 0.000 claims description 4
- 239000003599 detergent Substances 0.000 description 8
- 238000005187 foaming Methods 0.000 description 8
- 238000007792 addition Methods 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 6
- 239000004088 foaming agent Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- -1 detergency aids Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002979 fabric softener Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
- D06F35/005—Methods for washing, rinsing or spin-drying
- D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only
-
- 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
-
- 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
- D06F39/06—Arrangements for preventing or destroying scum
Definitions
- the present invention relates to a method for treating laundry in a household washing machine with a foam-forming liquor, comprising at least one washing process and at least one rinsing process.
- the detergents used in conventional washing machines are based on surfactants. Due to their amphiphilic molecular structure, these washing-active substances are able to form a thin layer on the water surface and thereby lower the surface tension of the water.
- the surfactants are also those which give the water the ability to foam.
- the reduction of the surface tension of the aqueous phase by addition of surfactants at the interface water / air has the consequence that the introduction of air, such as by mechanics entry when rotating a laundry drum, air bubbles are generated and can be partially stabilized by the formation of a surface layer without coalescing too fast.
- the basis for the formation of foam is thus a dispersion of air in wash liquor.
- the foams produced during washing are usually metastable foams which have a certain but limited lifetime. The lifetime is influenced by different quantities, for example by the type of surfactant, its concentration, the intensity of the air intake, the diameter of the resulting bubbles. If the life of the foam is very short, it is called an unstable foam.
- spherical foams Two types are further distinguished: spherical foams and polyhedral foams. In a foaming liquid such as a wash liquor, both types usually occur, wherein the polyhedra foam is located above the ball foam.
- foam can certainly also have beneficial effects. For example, foam dampens laundry during washing, and thus the mechanical input can be reduced despite a continuous rotary movement of the drum. This allows for a gentler
- Drum is hardly moved at all to keep the mechanical effect on the laundry as low as possible.
- the invention had the object of providing a method for treating laundry, which on the one hand allows utilization of the desired properties of foam during washing, without having the disadvantages, which brings a foaming with it.
- the inventive method for treating laundry in a household washing machine with a foam-forming liquor comprises at least one washing process, is used in the foam-forming liquor, and at least one rinsing process and is characterized in that for controlling the amount of foam during the washing process, a foam-promoting agent in a predetermined amount automatically added and automatically added a foam-inhibiting agent in a predetermined amount before completion of the rinsing process.
- This method has the great advantage that due to the chemical control of the foaming the respective washing program does not have to be changed or only minimal. This avoids time-consuming waiting times that were previously necessary to remove foam. At the same time, this process also makes it possible to utilize the positive properties of foam formation.
- This method is particularly suitable for household washing machines with an automatic dosing device.
- the amount of foam formed is monitored by a sensor.
- foam sensors are already known in the prior art.
- pressure sensors but also particularly suitable are optical sensors and the like.
- a specific foam level can be predetermined by the setting of a foam threshold, so that upon reaching, falling short of or exceeding a foam threshold, signals can be emitted in each case so that a corresponding measure can be taken.
- the sensor monitors the amount of foam and, when it falls below the foam threshold value, sends a signal to a control unit, which enables the automatic addition of a foam-promoting agent.
- a foam-inhibiting agent is added.
- foam threshold values for different washing programs. For example, in a gentle cycle for wool or silk, a higher foam level is required than in a full wash cycle.
- These foam threshold values are preferably already entered into the mentioned control unit or it is preprogrammed.
- the threshold value is in turn coupled to a signal which allows the metered addition of one of the foam-promoting or foam-inhibiting or foam-stabilizing agents mentioned. Shortly before rinsing or during rinsing, a foam-inhibiting agent is added to eliminate the foam formed as completely as possible. In this way, the problem is avoided that by clogging the gap between the drum and the tub adhering foam is prevented from spinning intended water.
- foaming, foam stabilizing and antifoaming agents which can be used according to the invention are already known in the prior art.
- Foaming agents include all agents which promote foaming, while foaming agents are understood to mean those which prevent foaming or destroy existing foam.
- Foaming agents also include foam stabilizing agents.
- foaming agents for example, the same surfactants can be used, which are already present in conventional detergents. That is, as a foam-promoting agent, among other things, the detergent used in a desired wash program is considered. To form a desired amount of foam, the detergent can be metered in differently, for example by adjusting a certain concentration or by adding it gradually or continuously until the required total amount is reached.
- the treatment agent which usually contains surfactants
- the drum can be moved at the same time, so that the mechanical effect of a certain air entry comes about and the foam can form.
- a foam-promoting agent can be added in addition to sufficient even with little movement and mechanics To form foam.
- the antifoaming agent may, in addition to this main function, have other functions supporting the rinsing process, such as a lowering of alkalinity, complexing, flocculation and the like.
- the foam-forming liquor is an aqueous solution of water and treating agents used to treat the laundry during the washing process. Treating agents include conventional detergents, detergency aids, additives and the foam promoting and antifoaming agents. When rinsing the fleet is gradually replaced by fresh water.
- the household washing machine has one or more containers for receiving the above-mentioned means, as well as a metering device for the automatic addition of the agent during the washing and rinsing process.
- these agents can be refilled or emptied by the user as needed.
- the containers can also be designed as disposable cartridges or refillable cartridges.
- An existing in modern household washing machines control device can be provided to control the method according to the invention with a suitable control program, which performs the method steps.
- a subset of a foam-forming detergent is added to a laundry during a washing process.
- foam is built up by the rotating drum at a predetermined speed, usually at the normal washing speed, which is 55 rpm in commercial washing machines.
- the amount of foam is monitored continuously via a foam sensor, thus roughly setting a given foam level.
- the fine adjustment of the amount of foam is achieved via defined additions of foam-promoting, foam-stabilizing and / or foam-inhibiting agents. This can be done both with and without changing the other device parameters.
- the foam is removed again by adding a foam-inhibiting agent. This can be both with and done without changing the other device parameters. As a result, short and water and energy-saving procedures are achieved.
- the present invention enables rapid and efficient foam generation / stabilization and removal, as well as energy and water saving laundry treatment.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Detergent Compositions (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
- Physical Water Treatments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007052837A DE102007052837A1 (en) | 2007-11-06 | 2007-11-06 | Process for treating laundry in a household washing machine with a foam-forming liquor |
PCT/EP2008/063895 WO2009059875A1 (en) | 2007-11-06 | 2008-10-15 | Method for treating laundry in a household washing machine having a foam-forming float |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2209937A1 true EP2209937A1 (en) | 2010-07-28 |
EP2209937B1 EP2209937B1 (en) | 2011-03-02 |
Family
ID=40210480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08846270A Active EP2209937B1 (en) | 2007-11-06 | 2008-10-15 | Method for treating laundry in a household washing machine having a foam-forming float |
Country Status (7)
Country | Link |
---|---|
US (1) | US8650689B2 (en) |
EP (1) | EP2209937B1 (en) |
CN (1) | CN101849059B (en) |
AT (1) | ATE500372T1 (en) |
DE (2) | DE102007052837A1 (en) |
EA (1) | EA016940B1 (en) |
WO (1) | WO2009059875A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009027934A1 (en) * | 2009-07-22 | 2011-01-27 | BSH Bosch und Siemens Hausgeräte GmbH | Process for finishing textiles in a household washing machine and control device and household washing machine |
US8844082B2 (en) | 2010-12-14 | 2014-09-30 | Whirlpool Corporation | Laundry treating appliance with biofilm treating cycle |
WO2012146296A2 (en) * | 2011-04-29 | 2012-11-01 | Ecolab Usa Inc. | Method for reducing the volume of foam by cooling means |
EP2960363B1 (en) * | 2014-06-27 | 2020-01-22 | Electrolux Appliances Aktiebolag | Method for washing laundry in a laundry washing machine and laundry washing machine |
DE102015108999A1 (en) * | 2015-06-08 | 2016-12-08 | Miele & Cie. Kg | Method and device for controlling foam in a tub of a washing machine |
CN107268241A (en) * | 2017-07-20 | 2017-10-20 | 青岛海尔滚筒洗衣机有限公司 | The method and washing machine of a kind of automatic dispensing defoamer |
CN111850961B (en) * | 2019-04-17 | 2023-12-22 | 博西华电器(江苏)有限公司 | Washing machine and foam detection method and device thereof |
CN113062077A (en) * | 2021-03-30 | 2021-07-02 | 长虹美菱股份有限公司 | Foam removing method of washing machine |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1948568A (en) * | 1930-04-28 | 1934-02-27 | Faber Engineering Company | Method of treating textile materials and the like |
FR1158799A (en) * | 1955-11-23 | 1958-06-19 | Pfenningsberg Gmbh Maschfab | Washing machine |
US3314254A (en) * | 1965-10-22 | 1967-04-18 | Whirlpool Co | Combination washer-dryer with a suds trap |
DE3042832A1 (en) * | 1980-11-13 | 1982-06-09 | Albert 5413 Bendorf Klösters | Washing machine with vertical drum - operated by circulation of compressed air produced by impeller in lid |
DE3703917A1 (en) | 1987-02-09 | 1988-08-18 | Bosch Siemens Hausgeraete | METHOD FOR AUTOMATIC WASHING OF LAUNDRY |
DE4104151A1 (en) | 1991-02-12 | 1992-08-13 | Miele & Cie | Laundry treatment machine with program control - and foam sensing device with switching mechanism to switch on heating device when foam is detected |
DE4334969A1 (en) | 1992-10-14 | 1994-04-21 | Miele & Cie | Laundry treatment machine destroys detergent foam - using device producing hot air introduced between washing solution container and drum |
MY115384A (en) * | 1994-12-06 | 2003-05-31 | Sharp Kk | Drum type washing machine and drier |
DE59913725D1 (en) * | 1998-09-30 | 2006-09-14 | Siemens Ag | Method and arrangement for the computer-aided determination of clusters for detecting foaming in a washing machine, and method and arrangement for detecting foaming in a washing machine |
DE19846248A1 (en) * | 1998-10-07 | 2000-04-13 | Bsh Bosch Siemens Hausgeraete | Process for monitoring and controlling the washing process in a laundry treatment machine and laundry treatment machine working according to this process |
US6463611B1 (en) * | 1999-04-02 | 2002-10-15 | Ecolab, Inc. | Apparatus for dispensing incompatible chemicals to a common utilization point |
US7026278B2 (en) * | 2000-06-22 | 2006-04-11 | The Procter & Gamble Company | Rinse-added fabric treatment composition, kit containing such, and method of use therefor |
JP3643772B2 (en) * | 2000-12-05 | 2005-04-27 | 株式会社東芝 | Drum washing machine |
US6662600B1 (en) * | 2002-08-07 | 2003-12-16 | Tennant Company | Foamed cleaning liquid dispensing system |
US20050188731A1 (en) * | 2002-02-13 | 2005-09-01 | Aouad Yousef G. | Systems, dispensers and methods for laundry additives |
DE10234472A1 (en) * | 2002-07-29 | 2004-02-12 | BSH Bosch und Siemens Hausgeräte GmbH | A method for preventing wash liquor foam inhibiting pump performance in a horizontal drum automatic washing machine has a foam detector controlling the drive motor for the drum |
KR101095555B1 (en) * | 2005-05-04 | 2011-12-19 | 삼성전자주식회사 | Washing machine and method to remove suds thereof |
-
2007
- 2007-11-06 DE DE102007052837A patent/DE102007052837A1/en not_active Withdrawn
-
2008
- 2008-10-15 CN CN200880114982XA patent/CN101849059B/en active Active
- 2008-10-15 EP EP08846270A patent/EP2209937B1/en active Active
- 2008-10-15 EA EA201070559A patent/EA016940B1/en not_active IP Right Cessation
- 2008-10-15 WO PCT/EP2008/063895 patent/WO2009059875A1/en active Application Filing
- 2008-10-15 US US12/682,281 patent/US8650689B2/en not_active Expired - Fee Related
- 2008-10-15 DE DE502008002778T patent/DE502008002778D1/en active Active
- 2008-10-15 AT AT08846270T patent/ATE500372T1/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2009059875A1 * |
Also Published As
Publication number | Publication date |
---|---|
EA201070559A1 (en) | 2010-12-30 |
CN101849059B (en) | 2012-04-18 |
DE502008002778D1 (en) | 2011-04-14 |
CN101849059A (en) | 2010-09-29 |
EP2209937B1 (en) | 2011-03-02 |
EA016940B1 (en) | 2012-08-30 |
DE102007052837A1 (en) | 2009-05-07 |
WO2009059875A1 (en) | 2009-05-14 |
ATE500372T1 (en) | 2011-03-15 |
US20100205752A1 (en) | 2010-08-19 |
US8650689B2 (en) | 2014-02-18 |
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