EP0722008B1 - Waschprogramme in Wäschewaschmaschinen oder in Geschirrspülmaschinen - Google Patents

Waschprogramme in Wäschewaschmaschinen oder in Geschirrspülmaschinen Download PDF

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Publication number
EP0722008B1
EP0722008B1 EP95120402A EP95120402A EP0722008B1 EP 0722008 B1 EP0722008 B1 EP 0722008B1 EP 95120402 A EP95120402 A EP 95120402A EP 95120402 A EP95120402 A EP 95120402A EP 0722008 B1 EP0722008 B1 EP 0722008B1
Authority
EP
European Patent Office
Prior art keywords
washing
during
heating element
programme
temperature
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.)
Expired - Lifetime
Application number
EP95120402A
Other languages
English (en)
French (fr)
Other versions
EP0722008A3 (de
EP0722008A2 (de
Inventor
Maurizio Mori
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.)
Electrolux Zanussi SpA
Original Assignee
Electrolux Zanussi 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
Application filed by Electrolux Zanussi SpA filed Critical Electrolux Zanussi SpA
Publication of EP0722008A2 publication Critical patent/EP0722008A2/de
Publication of EP0722008A3 publication Critical patent/EP0722008A3/de
Application granted granted Critical
Publication of EP0722008B1 publication Critical patent/EP0722008B1/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
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • 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
    • A47L15/4287—Temperature measuring or regulating arrangements
    • 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
    • D06F33/36—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing
    • 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
    • A47L2401/12—Water temperature
    • 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
    • A47L2501/06—Water heaters
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/02—Pressurised cleaning liquid delivered by a pump
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps

Definitions

  • the present invention refers to a clothes washing or dishwashing machine, in particular of the household type, which is provided with an appropriate electric circuit that, when associated with a timer means, enables a plurality of programmes to be set which differ from each other for their highest attainable temperature, wherein the rising phase of the temperature of the wash liquor can be interrupted selectively for a pre-determined time interval.
  • Clothes washing and dishwashing machines are known in the art the operation of which is controlled by wash cycle programming means, said cycle usually comprising at least a wash liquor heating-up phase, a wash liquor temperature holding phase, wherein said two phases are carried through when the washload holding drum is rotating regularly, and a final series of rinsing and spin-extraction phases (see EP-A-0 501 240).
  • Clothes washing or dishwashing machines are in particular known which are provided with a so-called "thermogradual" system for controlling the temperature of the wash liquor, such a system consisting in allowing one or more temperatures to be reached by energizing the heating element during one or more defined periods through appropriate configurations of the circuits and the programme sequence control switch.
  • washing programmes In view of making washing programmes to more strictly comply with the actual requirements of use, it is also a known technique, eg. from the patent specification FR 1.235.659, to enable the length of the washing time to be modified at will through the provision of additional timing means.
  • Such a solution gives only the possibility of modifying the washing time at constant temperature, but does not allow for any additional phases at pre-determined temperatures, differing from the nominal washing temperature, to be carried out within the same programme.
  • thermostop machines which are known in the art under the denomination of "thermostop” machines, share the characteristic that the ultimate, steady-state temperature of the washing liquor is reached with a single temperature-rise ramp.
  • water will be used in the following description to indifferently mean both washing liquor and rinse water. However, such a simplification will not affect the intelligibility of the exposure to any extent, owing to the context in which said term is actually used, as anyone skilled in the art will readily appreciate.
  • the present invention substantially relies on creating the possibility of introducing, both during the heating-up phase and the washing phase at the highest pre-set temperature, one or more time intervals which are caused to start when the temperature reaches a pre-determined value and during which the power supply to the heating element is cut off. According to such a mode of operation, the machine goes therefore on with the washing process, in particular keeping its washload-holding drum rotating regularly, while the power supply to the heating element is restored after each one of said time intervals, so that the washing programme can go on regularly until its end.
  • this enables washing phases at substantially constant temperature to be introduced in the programme, so as to be able to deal in a selective manner with the various types of soil in the washload during a pre-determined period of time, said phases being situated at temperature levels which are of course lower than the level of the highest pre-set temperature and are aimed at handling the type of soil in the washload that is more effectively removed at each one of said temperatures.
  • Figure 1 illustrates a graphical representation of the evolution of the washing liquor temperature in a 90°C washing programme.
  • Such a temperature evolution can be derived from said diagram for state-of-art machines by completely eliminating the time intervals indicated with the references t b , t c , t d on the abscissa, so that a single temperature rise phase would be obtained forming a single, straight temperature rise ramp from the initial value T 0 through to the final value at 90°C, without any dwelling time at the intermediate values of 40°C and 60°C.
  • a plurality of intervals of a pre-determined duration t b , t c , t d are planned to occur during the programme in an irregular succession, such intervals being in fact planned to start when the temperature of the washing liquor reaches respective values of 40°C, 60°C and 90°C.
  • the heating element provided to heat-up the washing liquor is de-energized, so that the programme, upon reaching said temperature values, undergoes a double effect: on the one hand there is a corresponding extension of the washing time, while this extension of the washing time is on the other hand is obtained by enabling the temperature to dwell exactly at the desired level which has been appropriately selected to cope with the type of soil which is particularly sensitive to and is best removable at precisely that temperature.
  • FIGs 2 and 3 illustrate on the contrary the evolution of the temperature of the washing liquor when a 60°C and 40°C washing programme according to the present invention is set, respectively.
  • Such graphical representations are quite readily and easily inferable and understandable by those who are skilled in the art, since they are the respective partializations of the diagram appearing in Figure 1, so that they do not need any further explanation.
  • a whole series of advantageous improvements of the present invention consists in providing the ability of defining, through appropriate control means adapted to be activated directly by the user, both the temperature or the temperatures at which said washing phases at substantially constant temperature are to occur and the duration thereof. Furthermore, the duration of each one of said intervals is adapted to be adjusted either individually for each temperature or in a common manner for all working temperatures reached in said intervals. Finally, in view of conferring the greatest possible extent of flexibility and, at the same time, simplicity to the machine, the duration of said intervals may be adapted to be adjusted either in a continuous manner or at fixed increments corresponding to discrete values.
  • the drum in order to further improve the washing performance of the machine, it is appropriate for the drum to be adapted to be driven at rotational speeds differing from the regular one during said washing phases at substantially constant temperature, so that the synergic effect of an intermediate washing action at a particular temperature for a pre-determined period of time, and at a rotating speed of the drum appropriately adjusted to suit that combination of programme, time and temperature, is actually able to ensure the best possible washing results.

Claims (7)

  1. Maschine zum Wäschewaschen oder Geschirrspülen, die versehen ist mit einem Waschbehälter, wenigstens einer Trommel, die drehbar in dem Waschbehälter angeordnet ist und zum Tragen der Waschladung geeignet ist, einem Heizelement zum Aufheizen der Flüssigkeit in dem Behälter, wenigstens einer Sensoreinrichtung zum Ermitteln der Temperatur der Flüssigkeit, einem Steuer- und Betätigungsgerät, elektrischen Schaltungen, die das Gerät mit verschiedenen Funktionstellen und Sensoren der Maschine verbindet, wobei das Gerät geeignet ist, eine Vielzahl von Waschprogrammen auszulösen und zu steuern, die sich gegenseitig wenigstens in der Tatsache unterscheiden, daß jedes Programm das Erreichen des höchsten Temperaturwertes der Flüssigkeit in dem Behälter definiert, der irgendwie unterschiedlich von dem höchsten Temperaturwert ist, der in den anderen Programmen erreichbar ist, dadurch gekennzeichnet, daß
    eine extern bereitgestellte Steuereinrichtung vorgesehen ist, die geeignet ist, eine wählbare Zeitperiode zu beinhalten, immer wenn die Temperatur der Flüssigkeit in dem Behälter während der Aufheizphase einen vorbestimmten Wert unter dem höchsten Temperaturwert erreicht, der in dem speziellen ausgewählten Waschprogramm erreichbar ist, automatisch die Netzversorgung zu dem Heizelement abschaltet und automatisch die Netzversorgung zu dem Heizelement am Ende der Zeitperiode wiederherstellt,
    die unterschiedlichen Temperaturwerte, die dem ausgewählten Waschprogramm entsprechen, während derer die Netzversorgung zu dem Heizelement abgeschaltet ist, für jedes der Vielzahl der Waschprogramme vorbestimmt werden können.
  2. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Dauer der wählbaren Zeitperiode entweder auf kontinuierliche Art und Weise oder mit festen Inkrementen angepaßt werden kann.
  3. Waschmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Anzahl der Zeitperioden, während derer das Heizelement nicht unter Spannung steht, von dem speziellen gewählten Waschprogramm abhängt.
  4. Waschmaschine nach einem der vorhergehenden Ansprüche und mit einem 90° Waschprogramm versehen, dadurch gekennzeichnet, daß während des Waschprogramms drei Phasen vorgesehen sind, während derer das Heizelement nicht unter Spannung steht, und zwar bei Erreichen von drei jeweils vorbestimmten Temperaturwerten.
  5. Waschmaschine nach einem der vorhergehenden Ansprüche und mit einem 60° Waschprogramm versehen, dadurch gekennzeichnet, daß während des Waschprogramms zwei Phasen vorgesehen sind, während derer das Heizelement nicht unter Spannung steht, und zwar bei Erreichen von zwei jeweils vorbestimmten Temperaturwerten.
  6. Waschmaschine nach einem der vorhergehenden Ansprüche und mit einem 40° Waschprogramm versehen, dadurch gekennzeichnet, daß während des Waschprogramms eine Phase vorgesehen ist, während der das Heizelement nicht unter Spannung steht, und zwar bei Erreichen eines entsprechenden vorbestimmten Temperaturwerts.
  7. Waschmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß während einer solchen wenigstens einen Zeitperiode, während der das Heizelement nicht unter Spannung steht, die Trommel angetrieben wird, um sich in einer unterschiedlichen Art und Weise im Vergleich zu der Art und Weise zu drehen, in der sie sich während des restlichen Teils der Waschphase dreht.
EP95120402A 1995-01-05 1995-12-22 Waschprogramme in Wäschewaschmaschinen oder in Geschirrspülmaschinen Expired - Lifetime EP0722008B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95PN000002A IT1282406B1 (it) 1995-01-05 1995-01-05 Lavabiancheria o lavastoviglie con programmi di lavaggio perfezionati
ITPN950002 1995-01-05

Publications (3)

Publication Number Publication Date
EP0722008A2 EP0722008A2 (de) 1996-07-17
EP0722008A3 EP0722008A3 (de) 1997-03-26
EP0722008B1 true EP0722008B1 (de) 1999-09-22

Family

ID=11394975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120402A Expired - Lifetime EP0722008B1 (de) 1995-01-05 1995-12-22 Waschprogramme in Wäschewaschmaschinen oder in Geschirrspülmaschinen

Country Status (4)

Country Link
EP (1) EP0722008B1 (de)
DE (1) DE69512372T2 (de)
ES (1) ES2139139T3 (de)
IT (1) IT1282406B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR0105826A (pt) * 2001-11-13 2003-08-19 Multibras Eletrodomesticos Sa Processo de remoção de manchas de roupas em máquinas lavadoras de eixo vertical
DE102012023084A1 (de) * 2012-09-17 2014-03-20 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Waschen von Wäschestücken in einem programmgesteuerten Hausgerät, sowie solches Hausgerät
ITPR20120096A1 (it) * 2012-12-28 2014-06-29 Indesit Co Spa Metodo di rimozione dello sporco da stoviglie

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003097A (en) * 1958-07-17 1961-10-03 Gen Electric Sequence control system for timing motor
DE1812653A1 (de) * 1968-11-29 1970-06-11 Siemens Elektrogeraete Gmbh Verfahren zum Waschen von Waesche in Haushaltwaschmaschinen
FR2632665B1 (fr) * 1988-06-10 1991-05-10 Ciapem Lave-linge pourvu d'une phase de trempage
DE4105760A1 (de) * 1991-02-23 1992-08-27 Licentia Gmbh Verfahren zum waschen von waesche in einer programmgesteuerten waschmaschine
IT1259233B (it) * 1992-10-29 1996-03-11 Zanussi Elettrodomestici Macchina per il lavaggio con regolazione di temperatura perfezionata.

Also Published As

Publication number Publication date
EP0722008A3 (de) 1997-03-26
DE69512372D1 (de) 1999-10-28
ITPN950002A1 (it) 1996-07-05
ITPN950002A0 (it) 1995-01-05
IT1282406B1 (it) 1998-03-23
EP0722008A2 (de) 1996-07-17
DE69512372T2 (de) 2000-05-25
ES2139139T3 (es) 2000-02-01

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