EP0995828A1 - Waschgang für Waschmaschine - Google Patents

Waschgang für Waschmaschine Download PDF

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Publication number
EP0995828A1
EP0995828A1 EP98830621A EP98830621A EP0995828A1 EP 0995828 A1 EP0995828 A1 EP 0995828A1 EP 98830621 A EP98830621 A EP 98830621A EP 98830621 A EP98830621 A EP 98830621A EP 0995828 A1 EP0995828 A1 EP 0995828A1
Authority
EP
European Patent Office
Prior art keywords
washing
stage
bleaching
bleach
cycle
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
EP98830621A
Other languages
English (en)
French (fr)
Other versions
EP0995828B1 (de
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8236839&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0995828(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Candy SpA filed Critical Candy SpA
Priority to EP98830621A priority Critical patent/EP0995828B1/de
Priority to ES98830621T priority patent/ES2237833T3/es
Priority to DE69829052T priority patent/DE69829052T2/de
Publication of EP0995828A1 publication Critical patent/EP0995828A1/de
Application granted granted Critical
Publication of EP0995828B1 publication Critical patent/EP0995828B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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

Definitions

  • the present invention relates to a novel bleaching washing cycle for wash-fast items, for washing machines.
  • sodium perborate has shown poor efficiency in normal washing cycles, particularly in the 60°C washing cycle which is most often used. In fact, only 30-40% of the sodium perborate is actually utilized, whilst the remaining quantity is discharged during the various rinses.
  • Bleach which is a solution of sodium hypochlorite, is a strong oxidizing agent which can attack and remove even the most persistent stains.
  • the use of bleach in washing cycles for washing machines is known. In known washing cycles, the bleach is taken in after or during the first rinse. It has been found that, although this method of operation is advantageous from the point of view of the economy of the process, it has some disadvantages.
  • sodium hypochlorite interferes with the optical whitening agents which are already partially fixed to the fabrics during washing and which are thus degraded, causing the yellowing phenomenon.
  • the problem upon which the present invention is based is to achieve a bleaching washing cycle which does not have the problems encountered in the known washing cycle.
  • a bleach is usually used in the bleaching stage.
  • bleaching stage using bleach has various advantages.
  • peroxide oxidizing agents for example, sodium perborate
  • bleach can also be used in washing conditions which are not ideal, for example, at low temperatures, in the presence of hard water, and with relatively short treatment times.
  • Bleach also has a considerable bactericidal effect even at low temperature. Treatment with bleach therefore has a disinfectant effect as well as eliminating persistent stains.
  • loads to be subjected to pre-washing and loads to be subjected to bleaching are fully compatible, in the sense that both require a pre-treatment (bleaching or pre-washing) followed by an actual washing (or prolonged washing) stage.
  • the selection of the bleaching stage or of the pre-washing stage is dictated substantially by the specific resistance to bleaching of the items to be washed.
  • a further advantage of the washing cycle of the present invention is therefore that the bleaching stage may be replaced by a pre-washing stage simply by loading the appropriate container of the washing machine with the pre-washing detergent instead of with bleach.
  • the respective reservoir should be dual-purpose.
  • the washing cycle of the present invention preferably also comprises a rinsing stage and a spinning stage upon completion of the bleaching stage.
  • the quantity of bleach usable in the bleaching stage may vary between 100 and 250 ml of commercial solution, enabling between 82 and 100% of the dirt to be removed.
  • the temperature and the washing time are two parameters which affect the efficiency of the bleaching stage. In general, the longer the bleaching time is, the lower the bleaching temperature can be.
  • the preferred washing cycle comprises a bleaching stage lasting for about 12 minutes and a bleaching temperature of about 40°C.
  • the washing cycle provides for an automatic continuation from the bleaching stage to the washing stage, in accordance with the programme set on the programmer.
  • the washing cycle comprises a stop stage between the bleaching stage and the washing stage.
  • stop stage is intended to define herein a stage in which the washing machine stops and can be re-started only by manual operation. Conversely, the absence of a stop stage means that the continuation from the bleaching stage to the washing stage takes place automatically.
  • the provision of the stop stage in the washing cycle enables the user to load, at this point - that is, immediately before the actual washing stage - any items which do not require a bleaching treatment, or for which such treatment would be damaging (delicate and/or coloured items).
  • a further advantage of the insertion of the stop stage is that the bleaching (or pre-washing with detergent instead of bleach) can be used as a short or quick-washing programme.
  • the rinsing and spinning stages are essential.
  • buttons and selectors which enable the rinsing and spinning stage to be excluded, according to requirements, thus prolonging the pre-washing stage.
  • the actual washing stage may be a normal wash at at least 60°C (or possibly 90°C) or a low-temperature wash (at about 40°C).
  • the washing times may be extended according to need. For example, an extended washing programme with a washing time of between 6 and 12 hours may be performed.
  • the washing machine should have some essential characteristics.
  • a bleach reservoir (a sealed reservoir) having sufficient capacity to hold 250 ml of bleach must be provided in the compartment for the supply of detergents and additives.
  • a device must be provided for instantaneously mixing water with the bleach so that the bleach does not come directly into contact with the laundry, causing damage to the fabrics.
  • a device which can advantageously be used for this purpose is that described in European patent filed in Italy under the number 25725BE/95 which is incorporated herein by reference.
  • the washing cycle shown in the graph of Figure 1 comprises:
  • the intermediate rinsing and spinning stages are provided for only in the case of bleaching. If a pre-washing stage is required instead of bleaching, the programme continues by extending the pre-washing stage and going on directly and automatically to the subsequent washing stage.
  • the washing cycle shown in Figure 2 is the same as that of Figure 1 with the difference that a stop stage has been inserted after the bleaching. This stop stage permits the loading of delicate items which would not have been able to withstand the initial bleaching stage.
  • the washing cycle shown in Figure 3 is the same as that of Figure 1 with the difference that the actual washing stage is performed at temperatures no greater than 40°C and can be extended even for a very long time (from 6 to 12 hours).
  • the washing cycle which provides for the bleaching, rinsing, spinning and subsequent washing stages may be interchanged with a washing cycle which provides solely for a pre-washing stage and subsequent actual washing. It is thus possible to establish a programme for washing machines which enables the two washing cycles to be selected according to requirements by means of suitable selectors and push-buttons for excluding rinsing/spinning and setting of the temperature. It should be noted that, in this case, the pre-washing must occupy the same time interval as is used to perform the bleaching, rinsing and spinning stages; an expanded pre-washing stage very advantageously results.
  • a further subject of the present invention is therefore the provision of a washing machine operating with a programme which permits the selection of a washing cycle with an initial bleaching stage as described above or, alternatively, a washing cycle with an expanded pre-washing stage.
  • the washing machine may comprise only three reservoirs for the withdrawal of detergents: one for the bleach or for the pre-washing detergent, one for the washing detergent, and one for additives.
  • the bleach reservoir should have a capacity of at least 250 ml and should be leaktight.
  • This reservoir may also be a normal tray which can be transformed into a leaktight reservoir by the insertion of a leaktight adaptor therein.
  • the washing machine may comprise four reservoirs, but with the condition that one of the first two adjacent reservoirs in the sequence performed by the programme will be a leaktight bleach reservoir.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detergent Compositions (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP98830621A 1998-10-19 1998-10-19 Waschgang für Waschmaschine Revoked EP0995828B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP98830621A EP0995828B1 (de) 1998-10-19 1998-10-19 Waschgang für Waschmaschine
ES98830621T ES2237833T3 (es) 1998-10-19 1998-10-19 Ciclo de lavado para maquina lavadora.
DE69829052T DE69829052T2 (de) 1998-10-19 1998-10-19 Waschgang für Waschmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98830621A EP0995828B1 (de) 1998-10-19 1998-10-19 Waschgang für Waschmaschine

Publications (2)

Publication Number Publication Date
EP0995828A1 true EP0995828A1 (de) 2000-04-26
EP0995828B1 EP0995828B1 (de) 2005-02-16

Family

ID=8236839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98830621A Revoked EP0995828B1 (de) 1998-10-19 1998-10-19 Waschgang für Waschmaschine

Country Status (3)

Country Link
EP (1) EP0995828B1 (de)
DE (1) DE69829052T2 (de)
ES (1) ES2237833T3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20121134A1 (it) * 2012-12-21 2014-06-22 Indesit Co Spa Metodo di controllo di una macchina lavabiancheria con funzionalita¿ di conclusione rapida di un ciclo di lavaggio
CN104652087A (zh) * 2013-11-25 2015-05-27 博西华电器（江苏）有限公司 洗衣机及其消毒洗涤方法、洗衣机控制器
CN109402945A (zh) * 2018-09-19 2019-03-01 珠海格力电器股份有限公司 一种洗衣机消毒洗涤控制方法及洗衣机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685587A1 (de) * 1994-05-26 1995-12-06 Merloni Elettrodomestici S.p.A. Waschmaschine mit verbesserter Waschmitteleinspülung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685587A1 (de) * 1994-05-26 1995-12-06 Merloni Elettrodomestici S.p.A. Waschmaschine mit verbesserter Waschmitteleinspülung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20121134A1 (it) * 2012-12-21 2014-06-22 Indesit Co Spa Metodo di controllo di una macchina lavabiancheria con funzionalita¿ di conclusione rapida di un ciclo di lavaggio
WO2014097168A1 (en) * 2012-12-21 2014-06-26 Indesit Company S.P.A. A method for controlling a washing machine provided with functionality of washing cycle rapid conclusion
RU2639272C2 (ru) * 2012-12-21 2017-12-20 Вирпул ЕМЕА С.п.А. Способ управления стиральной машиной с функциональностью быстрого завершения цикла стирки
CN104652087A (zh) * 2013-11-25 2015-05-27 博西华电器（江苏）有限公司 洗衣机及其消毒洗涤方法、洗衣机控制器
WO2015075602A1 (en) * 2013-11-25 2015-05-28 BSH Hausgeräte GmbH Washing machine, disinfecting and washing method of same, and washing machine controller
CN109402945A (zh) * 2018-09-19 2019-03-01 珠海格力电器股份有限公司 一种洗衣机消毒洗涤控制方法及洗衣机

Also Published As

Publication number Publication date
ES2237833T3 (es) 2005-08-01
DE69829052T2 (de) 2006-02-09
DE69829052D1 (de) 2005-03-24
EP0995828B1 (de) 2005-02-16

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