EP2733247B1 - Wäschewaschmaschine und zugehöriges Betriebsverfahren - Google Patents

Wäschewaschmaschine und zugehöriges Betriebsverfahren Download PDF

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Publication number
EP2733247B1
EP2733247B1 EP13193069.5A EP13193069A EP2733247B1 EP 2733247 B1 EP2733247 B1 EP 2733247B1 EP 13193069 A EP13193069 A EP 13193069A EP 2733247 B1 EP2733247 B1 EP 2733247B1
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EP
European Patent Office
Prior art keywords
compartment
level
liquid
linen
washing liquid
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.)
Not-in-force
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EP13193069.5A
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English (en)
French (fr)
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EP2733247A1 (de
Inventor
Mauro MANCINI
Mariangiola Dottori
Giuliana Latini
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.)
Whirlpool EMEA SpA
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Indesit Co SpA
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Publication of EP2733247A1 publication Critical patent/EP2733247A1/de
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Publication of EP2733247B1 publication Critical patent/EP2733247B1/de
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    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/02—Characteristics of laundry or load
    • D06F2101/06—Type or material

Definitions

  • the present invention relates to a linen washing machine and an operating method of a linen washing machine.
  • Washing machines of the prior art envisage a step of washing linen and a subsequent step of rinsing it.
  • washing machines wherein the quantity of water to be used during the rinse step is a function of the values rigidly pre-set in the electronic board.
  • the user by activating a relevant button, can select the half load function. In that case the user can at his discretion decide that the load of linen is moderate and can therefore request a lower quantity of water during the rinse.
  • the half load function is usually associated with a reduction in water consumption and therefore electrical energy also during the actual washing step and not only during the rinse.
  • the user often bases his choice on the mass of linen to be washed and not on the degree of water absorption that such linen can offer. For example, the user could decide to use the half load program when he needs to wash products which, whilst having a reduced mass, actually absorb a large quantity of water (which could translate into an insufficient rinse).
  • Document US 2008/189875 A1 discloses a wetting process in a washing machine entailing driving the drum continuously in a second phase until the water level in the tub reaches the level determined by the drop recognized in a first phase.
  • Document EP 1281803 A1 discloses a control method for a washing machine including the step of selecting one of a plurality of different rinsing and/or spin-drying cycles depending on the absorbency of the laundry being washed.
  • the technical task underpinning the present invention is to provide a washing machine and method that enables the linen rinse parameters to be optimised, in particular the quantity of water required in such an operation.
  • number 1 indicates a linen washing machine. This machine is typically a washing machine, but could also be a washer-dryer.
  • the washing machine 1 comprises a washing compartment 2.
  • the washing machine 1 comprises a linen housing drum 3 that can rotate and that is placed inside the washing compartment 2.
  • the washing machine 1 further comprises a washing liquid level sensor 4 in said compartment 2.
  • the level sensor 4 is able to identify a first operating condition in which the measured level is higher than a first predefined level L1 and a second operating condition in which the measured level is lower than a second predefined level L2 (the second level L2 is lower than the first level L1).
  • the level sensor 4 is usually a pressure switch.
  • the pressure switch could be a differential pressure switch. In this case, in the first operating condition, the pressure switch assumes a first configuration whereas in the second operating condition the pressure switch assumes a second configuration which is physically different from the first configuration.
  • the pressure switch may also be a linear pressure switch which detects in steps the level variations in the compartment 2.
  • the differential pressure switch unlike the linear pressure switch, is only able to determine whether a discrete number of pressure thresholds is exceeded or not (usually one or two).
  • the pressure switch is placed along a line 90 for unloading the washing liquid from the compartment 2.
  • the washing machine 1 comprises washing liquid introduction means 6 into the compartment 2.
  • the washing liquid introduction means 6 are operatively associated with the level sensor 4 and in the first and second operating condition they respectively stop and activate the introduction of washing liquid into the compartment 2.
  • the introduction means 6 comprise a solenoid valve 5 that is closed in the first operating condition, whereas it is open in the second operating condition.
  • a quantity of liquid is initially loaded in order to reach said first predefined level L1.
  • This first predefined level L1 is higher with respect to a lower portion 30 of the housing drum 3. Consequently the linen will absorb part of the washing liquid determining a lowering of the level of liquid in the compartment 2.
  • the reduction in the level will be compensated for by introducing a new quantity of washing liquid (through the introduction means 6) until the first predefined level L1 is reached. This operation will be repeated repeatedly until a condition is reached in which the linen will be substantially completely soaked (a situation in which there is no longer a drop in the level of washing liquid in the compartment 2 due to absorption by the linen).
  • the introduction of the washing liquid to compensate for the drop in level dictated by the absorption by the linen is known as a "top-up" in technical jargon.
  • the washing machine 1 comprises means 7 for determining a first parameter associated with the quantity of washing liquid introduced into the compartment 2 to top up said first level L1 and compensate for the absorption of liquid by the linen.
  • the first parameter in the preferred embodiment is actually the sum of the quantity of liquid introduced during the top-ups. In limit cases, the sum could coincide with the quantity of water introduced in a single top-up or could also be equal to zero (as is also clear from a mathematical point of view if there are no top-ups).
  • the machine 1 also comprises comparison means 8 of said first parameter with predetermined intervals of said first parameter. Each of said intervals is associated with a corresponding set of parameters connected with the quantity of water to be used in the rinse step.
  • such a set of parameters could comprise, for example: number of rinses (the number of rinses could also be equal to "1"), quantity of water to be introduced in each rinse, duration of each individual rinse, etc..
  • the washing machine 1 comprises an electronic control system (for example a main electronic board).
  • the means 7 for determining said first parameter and the aforementioned comparison means 8 are integrated into said electronic control system (e.g. they are integrated into the same electronic board).
  • the machine 1 further comprises a selector 9 of the type of linen to be washed.
  • a selector 9 could be a knob, a button or a touch screen, etc. It allows the user to choose from a discrete list of items the one he intends to use for washing.
  • the selector 9 is manually activated by the user.
  • the set of parameters connected with the quantity of water to be used in the rinse step varies as the setting of said selector 9 varies.
  • the utility of the selector 9 is particularly clear in the event of determined items such as quilts, for example. In fact, the applicant has verified that with determined and limited types of products it may be useful to use a specific quantity of water for that type of items by forcing the pre-set optimised algorithm in the machine 1.
  • the present invention relates to an operating method of a linen washing machine 1 (in Figure 1 the linen is schematically indicated by the reference letter "P").
  • This method enables the quantity of rinsing water to be used during the rinse to be optimised.
  • This method can be advantageously implemented by a linen washing machine having one or more of the characteristics described above (for that reason some of the concepts already described will be referred to again below).
  • the washing machine first performs an actual washing cycle followed by a rinse step.
  • the rinse step usually serves the purpose of removing any residue of detergent used in the actual washing step. Typically, but not necessarily, in the rinse step only water is used.
  • the rinse step may envisage the implementation of a plurality of rinses. Each rinse usually envisages the full replacement of the water contained in the compartment 2. In any case, the distinction between the washing cycle and the rinse step is well known in the technical field.
  • washing liquid means a liquid comprising water and any chemical products (detergents, softener, etc.).
  • the washing liquid loading step takes place at the start of a washing step.
  • the washing liquid loading step comprises the step of introducing the washing liquid until a first predefined level L1 is initially reached.
  • Such first level L1 is set by a level sensor 4.
  • the washing compartment 2 contains a drum 3 that can rotate and that is suitable for housing the linen to be washed.
  • the drum 3 can rotate with respect to the axis 31 indicated in Figure 1 .
  • the first level L1 surpasses a lower portion 30 of the drum 3.
  • the first level L1 therefore affects the linen placed in the drum 3.
  • the washing liquid loading step also envisages introducing into the compartment 2 a top-up liquid following the partial absorption by the linen of the washing liquid already contained in the compartment 2. It is specified that once the top-up liquid has been introduced into the compartment 2 it is also considered washing liquid.
  • the top-up liquid introduction step envisages repeatedly topping up the first level L1 by adding top-up liquid to compensate for the washing liquid absorbed by the linen.
  • the top-up liquid may or may not be of the same type as the washing liquid already contained in the compartment 2.
  • the top-up liquid is normally added once the level in the compartment 2 in a time span predetermined by the reaching of the first level L1 drops below the second predefined level L2.
  • the drum 3 is advantageously placed in rotation in order to promote the absorption of the liquid by the linen contained therein.
  • the repetition ends when at the end of a time span predetermined by the last reaching of the level L1, a lower level than the second predefined level L2 is not detected.
  • the method also comprises the step of determining a first parameter univocally associated with the quantity of top-up liquid introduced into the compartment 2.
  • the first parameter could be equal or directly proportional to the product of the flow rate and the time in which the solenoid valve 5 remains open during said step of repeatedly topping up the first predefined level L1.
  • Said time is usually equal to the sum of a number of time intervals corresponding to each repetition, but could also correspond to a single time interval (in this case there would only be one top-up); furthermore, in the event that there are no top-ups such time could also be null.
  • the situation in which there are no top-ups is a situation that could arise if items to be washed, which absorb very little water, are placed in the compartment 2.
  • a particularly advantageous way of determining the water flow rate envisages measuring the time that, with the solenoid valve 5 open, the level of liquid in the compartment 2 takes to rise from one pre-established reference level L3 to said first predefined level L1, said flow rate being a function of the ratio between a first volume and a first time interval (the first volume is equal to the volume of the liquid interposed between the pre-established reference level L3 and the first pre-defined level L1; the first time interval is equal to the time that, with the solenoid valve 5 open, the level of liquid in the compartment 2 takes to rise from the pre-established reference level L3 to said first predefined level L1).
  • the step of measuring the time that, with the solenoid valve 5 open, the level of liquid in the compartment 2 takes to pass from a pre-established reference level L3 to said predefined level L1 takes place during the step (already defined above) of introducing the washing liquid until the initial reaching of the first level L1.
  • the method therefore envisages determining a set of parameters associated with the quantity of water to be used in a linen rinse step.
  • the step of determining said set of parameters envisages comparing said first parameter (determined for example according to the indications provided above) with corresponding predetermined intervals of said first parameter.
  • intervals are consecutive to each other.
  • the higher the flow rate of the water introduced through the top-ups the higher the value of said first parameter will be.
  • Each of said intervals of the first parameter corresponds to a set of parameters associated with the quantity of water to be used in the rinse step.
  • the higher the quantity of washing liquid loaded through the top-ups the higher the quantity of water to be used in the rinse step will be.
  • the quantity of washing liquid introduced with the top-ups provides an indication of the absorption by the linen.
  • the absorption may vary greatly not only as the mass of the load varies (as the mass increases the absorption increases), but also according to its type (e.g. a cushion of the same mass absorbs more liquid than a pair of shoes).
  • the quantity of water to be used during the rinse is optimised by connecting such a variable with the absorption of liquid by the linen.
  • the step of determining the set of parameters associated with the quantity of water to be used in a linen rinse step envisages determining at least the number of rinse cycles to be performed in the rinse step and/or the quantity of water to be introduced in each rinse cycle and/or the duration of each rinse cycle (from which the overall duration of the rinse cycle could immediately be derived).
  • the step of determining the quantity of water to be introduced in each rinse cycle envisages determining the opening time of the solenoid valve 5 in each rinse cycle or the various levels which when reached in each rinse cycle determine the stopping of the introduction of water into the compartment 2.
  • the method finally envisages performing a rinse step by adopting the set of parameters corresponding to the interval identified by said comparison step of said first parameter with corresponding pre-determined intervals of such first parameter.
  • the present invention enables many advantages to be attained. First of all, it enables an optimised estimate to be made of the water to be used in the rinse step considering the real requirements of the load (therefore not only influenced by the mass or only by the type of load). A further important advantage is connected with the possibility to directly associate, through a precise correspondence, said first parameter (connected with the absorption of the washing liquid) with said set of parameters (connected with the rinse cycle) without needing to use complicated calculation algorithms (which would require a suitably sized and expensive processor). According to the invention said set of parameters (connected with the rinse) can vary discretely as a function of the interval assumed by the first parameter.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detergent Compositions (AREA)

Claims (10)

  1. Betriebsverfahren für eine Textilwaschmaschine (1), das folgenden Schritt umfasst:
    i) Einfüllen einer Waschflüssigkeit in einen Waschbottich (2), wobei der Waschbottich (2) eine Trommel (3) umfasst, die sich drehen kann und die die zu waschenden Textilien aufnimmt, wobei der Schritt des Einfüllens der Waschflüssigkeit Folgendes umfasst:
    - einen Schritt zum Einleiten der Waschflüssigkeit, bis ein erster zuvor festgelegter Füllstand (L1) erreicht ist, wobei der erste Füllstand (L1) höher ist als ein unterer Abschnitt (30) der Trommel (3);
    - Einleiten, in den Bottich (2), einer Nachfüllflüssigkeit im Anschluss an eine zuvor festgelegte Absorption der bereits in dem Bottich (2) enthaltenen Waschflüssigkeit durch die Textilien; wobei die Nachfüllflüssigkeit, nachdem sie in den Bottich (2) eingeleitet wurde, ebenfalls als Waschflüssigkeit angesehen wird;
    wobei das Verfahren dadurch gekennzeichnet ist, dass es des Weiteren folgende Schritte umfasst:
    ii) Bestimmen eines ersten Parameters, der eindeutig der Menge der in den Bottich (2) eingeleiteten Nachfüllflüssigkeit zugeordnet ist;
    iii) Bestimmen eines Satzes von Parametern, die einer Menge an Wasser zugeordnet sind, das in einem Spülschritt für die Textilien eingeleitet werden soll, wobei der Schritt des Bestimmens des Satzes von Parametern einen Vergleich des ersten Parameters mit entsprechenden zuvor festgelegten Intervallen dieses ersten Parameters vorsieht, wobei jedes der Intervalle einem entsprechenden Satz von Parametern zugeordnet ist, die der Menge an Wasser zugeordnet sind, das in einem Spülschritt verwendet werden soll;
    iv) Ausführen eines Spülschrittes unter Verwendung des Satzes von Parametern, die dem Intervall entsprechen, das durch den Schritt des Vergleichens des ersten Parameters mit entsprechenden vorgegebenen Intervallen dieses ersten Parameters identifiziert wurde.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Schritt des Bestimmens des Satzes von Parametern, die der Menge an Wasser zugeordnet sind, das in dem Textilien-Spülschritt zu verwenden ist, das Bestimmen mindestens der Anzahl von Spülzyklen, die in dem Spülschritt auszuführen sind, und/oder die Menge an Wasser, das in jedem Spülzyklus einzuleiten ist, und/oder die Dauer jedes Spülzyklus vorsieht.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Schritt des Bestimmens der Menge an Wasser, das in jedem Spülzyklus einzuleiten ist, das Bestimmen, für jeden Spülzyklus, die Öffnungszeit des Solenoidventils (5) oder des Füllstandes, der das Stoppen des Einleitens von Wasser in den Bottich (2) vorsieht.
  4. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Schritt des Bestimmens eines ersten Parameters, der eindeutig der Menge an Nachfüllflüssigkeit zugeordnet, Folgendes vorsieht:
    - Bestimmen der Strömungsrate der durch das Solenoidventil (5) in den Bottich (2) eingeleiteten Waschflüssigkeit;
    - Zählen der Zeit, in der das Solenoidventil (5) während des Schrittes zum Einleiten der Nachfüllflüssigkeit offen ist;
    wobei der erste Parameter zu dem Produkt der Strömungsrate und der Zeit, in der das Solenoidventil (5) während des Schrittes zum Einleiten der Nachfüllflüssigkeit offen bleibt, proportional ist.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der Schritt des Bestimmens der Wasserströmungsrate vorsieht, die Zeit zu messen, die es bei geöffnetem Solenoidventil (5) dauert, bis der Füllstand der Waschflüssigkeit in dem Bottich (2) von einem zuvor festgelegten Referenzfüllstand (L3) zu dem ersten zuvor festgelegten Füllstand (L1) ansteigt, wobei die Strömungsrate eine Funktion des Verhältnisses zwischen einem ersten Volumen und einem ersten Zeitintervall ist; wobei das erste Volumen gleich dem Volumen der Flüssigkeit ist, die sich zwischen dem zuvor festgelegten Referenzfüllstand (L3) und dem ersten zuvor festgelegten Füllstand (L1) befindet; wobei das erste Zeitintervall gleich der Zeit ist, die es bei geöffnetem Solenoidventil (5) dauert, bis der Füllstand der Waschflüssigkeit in dem Bottich (2) von einem zuvor festgelegten Referenzfüllstand (L3) zu dem ersten zuvor festgelegten Füllstand (L1) ansteigt.
  6. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Schritt zum Einleiten der Nachfüllflüssigkeit vorsieht, den ersten zuvor festgelegten Füllstand (L1) wiederholt nachzufüllen, indem Nachfüllflüssigkeit zugegeben wird, um die bereits in dem Bottich (2) enthaltene Waschflüssigkeit, die durch die Textilien absorbiert wurde, zu kompensieren.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass der Schritt des wiederholten Nachfüllens des ersten zuvor festgelegten Füllstandes (L1) vorsieht, dass jede Wiederholung nur stattfindet, wenn innerhalb einer vorgegebenen Zeitspanne ab dem letzten Erreichen des ersten Füllstandes (L1) der Füllstand in dem Bottich (2) unter einen zweiten zuvor festgelegten Füllstand (L2) gesunken ist; wobei der zweite zuvor festgelegte Füllstand (L2) niedriger ist als der erste zuvor festgelegte Füllstand (L1); wobei während mindestens eines Teils der Zeitspanne die Trommel (3) innerhalb des Bottichs (2), in der sich die Textilien befinden, gedreht wird, um die Absorption der Waschflüssigkeit durch die Textilien selbst zu verbessern.
  8. Textilwaschmaschine, die Folgendes umfasst:
    - einen Waschbottich (2);
    - einen Waschflüssigkeit-Füllstandssensor (4) in dem Bottich (2), wobei der Füllstandssensor (4) einen ersten Betriebszustand identifiziert, in dem der gemessene Füllstand höher ist als ein erster zuvor festgelegter Füllstand (L1), und einen zweiten Betriebszustand identifiziert, in dem der gemessene Füllstand niedriger ist als ein zweiter zuvor festgelegter Füllstand (L2);
    - ein Mittel (6) zum Einleiten der Waschflüssigkeit in den Bottich (2), das funktional dem Füllstandssensor (4) zugeordnet ist, und das, wenn der erste und der zweite Betriebszustand eintritt, das Einleiten der Waschflüssigkeit in den Bottich (2) stoppt bzw. aktiviert;
    wobei die Maschine dadurch gekennzeichnet ist, dass sie des Weiteren Folgendes umfasst:
    - ein Mittel (7) zum Bestimmen eines ersten Parameters, welcher der Menge an Waschflüssigkeit zugeordnet ist, die in den Bottich (2) eingeleitet wird, um die Absorption der Flüssigkeit durch die Textilien während eines Schrittes des Einfüllens der Waschflüssigkeit zu kompensieren;
    - ein Mittel (8) zum Vergleichen des ersten Parameters mit vorgegebenen Intervallen des ersten Parameters, wobei jedes der Intervalle einem entsprechenden Satz von Parametern zugeordnet ist, die mit der Menge an Wasser verbunden sind, das in dem Spülschritt zu verwenden ist;
    - ein Mittel zum Ausführen eines Spülschrittes unter Verwendung des Satzes von Parametern, die dem Intervall entsprechen, das durch den Schritt des Vergleichs des ersten Parameters mit entsprechenden vorgegebenen Intervallen dieses ersten Parameters identifiziert wurde.
  9. Maschine nach Anspruch 8, dadurch gekennzeichnet, dass das Mittel (7) zum Bestimmen eines ersten Parameters, welcher der Menge an Waschflüssigkeit zugeordnet ist, die in den Bottich (2) eingeleitet wird, um die Absorption der Flüssigkeit durch die Textilien während einen Schritt des Einfüllens der Waschflüssigkeit zu kompensieren, ein Mittel (7) zum Bestimmen eines ersten Parameters ist, welcher der Menge Waschflüssigkeit zugeordnet, die in den Bottich (2) eingeleitet wurde, um den ersten zuvor festgelegten Füllstand (L1) aufzufüllen.
  10. Maschine nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass sie einen Wählschalter (9) für die Art der zu waschenden Textilien umfasst, wobei der Wählschalter (9) manuell durch einen Nutzer aktiviert wird; wobei der Satz von Parametern variiert, wenn die Einstellung des Wählschalters (9) variiert wird.
EP13193069.5A 2012-11-19 2013-11-15 Wäschewaschmaschine und zugehöriges Betriebsverfahren Not-in-force EP2733247B1 (de)

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Application Number Priority Date Filing Date Title
IT000077A ITPR20120077A1 (it) 2012-11-19 2012-11-19 Macchina di lavaggio panni e relativo metodo di funzionamento.

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EP2733247B1 true EP2733247B1 (de) 2016-12-21

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KR100403026B1 (ko) * 2001-07-31 2003-10-23 삼성전자주식회사 세탁물의 흡수특성을 고려한 세탁기의 제어방법
DE102005012426A1 (de) * 2005-03-17 2006-09-21 BSH Bosch und Siemens Hausgeräte GmbH Benetzungsprozess für die Wäsche in einer programmgesteuerten Waschmaschine
ITRN20110008A1 (it) * 2011-02-11 2012-08-12 Indesit Co Spa Metodo di caricamento di un liquido di lavaggio in una macchina di lavaggio panni

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ITPR20120077A1 (it) 2014-05-20

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