EP4012092A1 - Verfahren zum wäschewaschen, waschmaschine und programm zum durchführen eines solchen verfahrens - Google Patents

Verfahren zum wäschewaschen, waschmaschine und programm zum durchführen eines solchen verfahrens Download PDF

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Publication number
EP4012092A1
EP4012092A1 EP21213347.4A EP21213347A EP4012092A1 EP 4012092 A1 EP4012092 A1 EP 4012092A1 EP 21213347 A EP21213347 A EP 21213347A EP 4012092 A1 EP4012092 A1 EP 4012092A1
Authority
EP
European Patent Office
Prior art keywords
washing
filling
drum
laundry
water
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.)
Pending
Application number
EP21213347.4A
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English (en)
French (fr)
Inventor
Safia Zaakour
Ali Boutahra
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.)
Groupe Brandt SAS
Original Assignee
Groupe Brandt SAS
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 Groupe Brandt SAS filed Critical Groupe Brandt SAS
Publication of EP4012092A1 publication Critical patent/EP4012092A1/de
Pending 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
    • 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
    • D06F33/34—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
    • 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
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2105/02—Water supply

Definitions

  • the present invention relates to the field of machine washing methods, implementing several linen treatment phases.
  • the invention relates more particularly to the wetting phase of the laundry, at the start of a washing process.
  • It also relates to a laundry washing machine implementing such a method, and more particularly to a rotating drum washing machine.
  • It also relates to a program capable of being implemented by a control module of a washing machine to implement such a method.
  • Many clothes washing machines comprise a perforated drum containing the clothes to be washed, driven in rotation in a tank which can be filled with washing water.
  • These laundry washing machines conventionally implement a laundry washing process, or laundry washing cycle, comprising a succession of several linen treatment phases. At the start of a washing cycle, one of the first phases is commonly constituted by a phase of wetting the laundry.
  • washing water is introduced into the tub, and the drum is driven in rotation.
  • the linen contained in the drum therefore comes into contact with water, until it becomes wet.
  • the laundry washing cycle can then continue with this wet laundry.
  • the linen wetting phase can comprise several successive steps of filling the tank and rotating the drum, in order to minimize the quantity of water used for washing.
  • the tank is filled with washing water up to a predetermined filling level.
  • This fill level is normally relatively low, and insufficient to wet a large amount of laundry.
  • This first filling step is followed by a first drum rotation step, during which the drum is driven in rotation to bring the laundry into contact with the washing water. During this step, wash water is absorbed by the laundry, which lowers the water level in the tub.
  • water is then added up to the same predetermined filling level, during a second filling step, to replace the water absorbed by the laundry.
  • This second filling step is followed by a second drum rotation step, during which the drum of the machine is driven in rotation to bring the laundry into contact with water.
  • final filling water is once again added to the drum up to the same predetermined filling level.
  • the quantity of washing water absorbed by the linen varies, in particular according to the quantity of linen and its capacity to absorb water.
  • a large quantity of laundry, or particularly absorbent laundry absorbs more water during the rotation of the drum. Consequently, the quantity of washing water added during the second and third filling stages naturally adapts to the characteristics of the laundry to be wetted.
  • the present invention aims to improve the solutions of the prior art, by overcoming their drawbacks.
  • an object of the invention is to provide a washing process, or washing cycle, in a laundry washing machine, which makes it possible to optimize the quantity of washing water consumed.
  • a particular objective is to optimize the amount of water consumed during the laundry wetting phase of a laundry washing cycle.
  • An object of the invention is thus to save the energy necessary for heating the water used for washing the laundry.
  • Another object of the invention is to provide such a method which can be implemented by robust, reliable and inexpensive equipment, and which does not affect the reliability and robustness of the washing machine.
  • a particular object of the invention is to provide such a method which can be implemented easily on existing washing machines, without modifying their hardware components.
  • the invention also aims to provide a washing machine which implements such a method of washing clothes.
  • Such a waiting step between a step of rotating the drum and the next step of filling the drum, allows the free water retained in the laundry to flow into the tub.
  • the quantity of water that must be added to reach the predetermined level is then lower, which reduces the quantity of water consumed during the filling phase.
  • the energy needed to heat this water, in the following phases of the wash cycle, is also lower. The implementation of this solution therefore saves resources and energy.
  • the first predetermined filling level and the second predetermined filling level are identical.
  • the same level sensor can thus be used, which facilitates the implementation of the method.
  • said drum is immobile, for a period of at least 30 seconds.
  • said drum is immobile, for a period of at least one minute.
  • the second predetermined filling level and the third predetermined filling level are identical.
  • this washing machine comprises a device for detecting a water level, able to communicate to the control module information concerning the level of washing water in the tank.
  • this water level detection device comprises a pressure switch.
  • the invention also relates to a program product, capable of being implemented by a control module of a washing machine comprising a tub in which a drum, containing the laundry to be washed, is driven in rotation by a device for drive, and means for filling this tank with washing water, this program implementing, when it is executed by the control module, a laundry washing process as described above.
  • the figure 1 schematically represents a washing machine 1 according to one embodiment of the invention.
  • This washing machine 1 comprises a tank 2, capable of containing the washing water.
  • a pipe 21, closed by a solenoid valve 22, makes it possible to supply the tank 2 with washing water.
  • the tank 2 is also equipped with a draining system, not represented on the figure 1 , allowing it to be emptied of the liquid it contains.
  • a heating resistor 23 capable of heating the washing water that it contains.
  • washing water The liquid used for wetting the laundry is designated generically, in the present application, as “washing water”.
  • This liquid can, however, be water combined with a washing product, such as laundry detergent, or with any other product, without this having any effect on the invention described.
  • a drum 3, of cylindrical shape, is mounted in the tank 2, pivoting about an axis 31.
  • This drum 3 can be driven in rotation controlled by a drive device, not shown.
  • This drum 3 is designed to contain laundry 5 intended to be washed. Conventionally, this drum is perforated, which means that the water present in the tank 2, outside the drum 3, can penetrate without restriction inside the drum 3.
  • the tank 2 is also equipped with a device for detecting a water level, which can be constituted by any level sensor known to those skilled in the art.
  • this device for detecting a water level consists of a pressure switch 4 associated with a compression chamber 41 communicating with the tank 2.
  • the pressure switch is connected to the compression chamber via a small diameter hose forming a pressure switch pipe 42.
  • the pressure switch 4 is an electrical contactor which changes state under the effect of pressure exerted on a flexible membrane. As the wash water level rises in tank 2, air pressure increases in the compression chamber 41 and in the pressure switch pipe 42. This trapped air exerts pressure on the flexible membrane of the pressure switch 4.
  • the flexible membrane of the pressure switch 4 is subjected to sufficient pressure to press on a needle of the pressure switch and flip the contactor. In the embodiment shown, this switching of the contactor causes the closing of the solenoid valve 22.
  • this pressure switch 4 is configured so as to emit a signal when the water level reaches, in the tank 2, the level represented by the dotted lines 40 on the figure 1 .
  • the level detection device can be a sensor of another type.
  • this level detection device may consist of an analog pressure switch which delivers an electrical signal proportional to the water level in the tank.
  • a predefined water level in the tank then corresponds to a predefined value of the electrical signal supplied by the pressure switch. It is thus possible, with such an analog pressure switch, to detect the overrun of several distinct predefined levels, or even to follow in real time the evolution of the level of washing water in the tank.
  • the washing machine 1 is designed for the implementation of a washing process, or washing cycle. It comprises for this a control module (not shown), capable in particular of controlling the solenoid valve 22 and the drive device of the drum 3, and of receiving the signals from the pressure switch 4.
  • This control module implements a program of control, which can be likened to a computer program, allowing the implementation by the washing machine 1 of the washing process, or washing cycle.
  • the laundry washing process is modified, compared to the processes of the prior art, to introduce one or more waiting steps during the laundry wetting phase.
  • the figure 2 schematically represents the succession of steps implemented during such a laundry wetting phase, in a washing process according to one embodiment of the invention.
  • the picture 3 represents two curves: a first curve 81 is representative of the quantity of water contained at the bottom of the tank 2 during the implementation of the linen wetting phase, and the curve 82 is representative of the speed of rotation of the drum 3 during the implementation of the laundry wetting phase.
  • the laundry wetting phase implemented by the washing machine 1 comprises the steps described below.
  • the wetting phase begins with a first stage of filling 91 of the tank, during which the solenoid valve 22 is open until the signal emitted by the pressure switch 4 indicates that the washing water in the tank reaches the predetermined level 40.
  • curve 81 shows, the quantity of water at the bottom of the tank increases rapidly during this stage, until it reaches the predetermined level 40.
  • This filling stage is followed by a first stage of rotation of the drum 92.
  • the quantity of water at the bottom of the tank decreases due to the absorption of water from washing by the linen which is brewed.
  • the duration of this rotation step is predetermined. However, provision may be made, in other embodiments, for this step to end when the water level in the tank reaches a predetermined low level.
  • this first stage 92 of rotation of the drum begins after the end of the first filling stage 91. Thus, it is avoided that the rotation of the drum disturbs the water level and thus the reading the wash water level in the tub. He could however be provided, in other embodiments, that this first stage of rotation of the drum 92 begins before the end of the first filling stage 91, and that these two stages overlap at least partially.
  • the curve 82 shows a constant rotation speed of the drum during this first stage of rotation of the drum 92, it is also possible that the rotation of the drum is variable, or that the rotation is intermittent, for example by alternating rotations in different directions.
  • the wetting phase continues with a first waiting step 93, lasting 30 seconds, during which the drum 3 is stationary.
  • this first waiting phase 93 the quantity of washing water at the bottom of the tank 2 again increases slightly, due to the flow into the tank 2 of the free water retained by the linen 5.
  • this waiting phase must last at least 20 seconds. A longer duration, for example one minute, can further improve its effectiveness.
  • the wetting phase continues with a second filling step 94 of the tank, during which the solenoid valve 22 is open until the signal emitted by the pressure switch 4 indicates that the washing water in the tub reaches the predetermined level 40.
  • the amount of water at the bottom of the tub increases again rapidly during this stage, until it reaches the level predetermined 40.
  • This second filling stage is followed by a second stage of rotation of the drum 95, during which the quantity of water at the bottom of the tank decreases again slightly due to the absorption of the washing water by the laundry. .
  • the wetting phase continues with a second waiting step 96, lasting 30 seconds, during which the drum 3 is stationary.
  • this second waiting step 96 the water level rises slightly due to the flow into the tank of the free water contained in the laundry.
  • the wetting phase ends with a third filling step 94 of the tank, during which the solenoid valve 22 is open until the signal emitted by the pressure switch 4 indicates that the washing water in the tub reaches the predetermined level 40.
  • the amount of water that must be added for the washing water level to reach the predetermined level 40 is then lower than if the filling step had followed immediately. the drum rotation stage, without the free water retained by the laundry having time to flow into tank 2.
  • the quantity of water consumed during the filling phase is therefore lower. Moreover, this quantity of water being lower, the energy required to heat this water, in the following phases of the washing cycle, is lower.
  • the implementation of the solution of the invention therefore allows a saving of resources and energy.
  • the inventors have compared two washing cycles carried out by the same machine, loaded with the same laundry, under identical conditions.
  • the first washing cycle included a wetting phase comprising three successive filling steps, separated by drum rotation steps, without waiting steps.
  • the second wash cycle included a wetting phase comprising three successive filling steps, separated by drum rotation steps, followed by waiting steps.
  • the quantity of washing water consumed during the filling phase was therefore 13.4 liters.
  • the energy consumed during this wash cycle including the energy for heating the wash water, was 0.673 kWh. This heating of the wash water lasted 11'36", and the total wash cycle lasted 159'.
  • the quantity of washing water consumed during the filling phase was therefore 12.5 litres.
  • the energy consumed during this wash cycle including the energy for heating the wash water, was 0.560 kWh. This heating of the wash water lasted 7'28", and the total wash cycle lasted 157'.
  • the addition, during the wetting phase of the laundry, of the waiting stages according to the invention makes it possible to achieve a saving of 0.9 liters on the consumption of washing water, to reduce the heating time and achieve a saving of 0.113 kWh. Furthermore, the inventors have verified that this modification of the washing cycle does not lead to any degradation of the laundry washing performance.
  • the wetting phase has three successive filling steps, separated from each other by drum rotation steps followed by waiting steps.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP21213347.4A 2020-12-09 2021-12-09 Verfahren zum wäschewaschen, waschmaschine und programm zum durchführen eines solchen verfahrens Pending EP4012092A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2012929A FR3117134B1 (fr) 2020-12-09 2020-12-09 Procédé de lavage de linge, machine à laver et programme mettant en œuvre un tel procédé

Publications (1)

Publication Number Publication Date
EP4012092A1 true EP4012092A1 (de) 2022-06-15

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EP21213347.4A Pending EP4012092A1 (de) 2020-12-09 2021-12-09 Verfahren zum wäschewaschen, waschmaschine und programm zum durchführen eines solchen verfahrens

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EP (1) EP4012092A1 (de)
FR (1) FR3117134B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008003577A1 (de) * 2006-07-04 2008-01-10 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur behandlung von wäsche sowie hierzu geeignete programmgesteuerte waschmaschine
EP2752515A1 (de) * 2011-09-02 2014-07-09 Panasonic Corporation Trommelwaschmaschine
WO2020234370A1 (en) * 2019-05-23 2020-11-26 BSH Hausgeräte GmbH Washing machine and control method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008003577A1 (de) * 2006-07-04 2008-01-10 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur behandlung von wäsche sowie hierzu geeignete programmgesteuerte waschmaschine
EP2752515A1 (de) * 2011-09-02 2014-07-09 Panasonic Corporation Trommelwaschmaschine
WO2020234370A1 (en) * 2019-05-23 2020-11-26 BSH Hausgeräte GmbH Washing machine and control method thereof

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FR3117134B1 (fr) 2023-11-24
FR3117134A1 (fr) 2022-06-10

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