EP3467181B1 - Verfahren zum waschen von wäsche in einer wäschewaschmaschine - Google Patents

Verfahren zum waschen von wäsche in einer wäschewaschmaschine Download PDF

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Publication number
EP3467181B1
EP3467181B1 EP17194511.6A EP17194511A EP3467181B1 EP 3467181 B1 EP3467181 B1 EP 3467181B1 EP 17194511 A EP17194511 A EP 17194511A EP 3467181 B1 EP3467181 B1 EP 3467181B1
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EP
European Patent Office
Prior art keywords
washing
laundry
electric motor
rotating speed
drum
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Application number
EP17194511.6A
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English (en)
French (fr)
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EP3467181A1 (de
Inventor
Martino Bondi
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Electrolux Appliances AB
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Electrolux Appliances AB
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Priority to EP17194511.6A priority Critical patent/EP3467181B1/de
Publication of EP3467181A1 publication Critical patent/EP3467181A1/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
    • 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
    • D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry
    • 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
    • D06F2101/04—Quantity, e.g. weight
    • 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
    • D06F2101/10—Spin speed
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F2103/24—Spin speed; Drum movements
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user

Definitions

  • the present invention concerns the field of laundry washing techniques. Specifically, the invention relates to a method for controlling a spinning phase in a laundry washing machine capable of performing a more efficient washing program.
  • laundry washing machines both "simple” laundry washing machines (i.e. laundry washing machines which can only wash and rinse laundry) and laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry), is widespread.
  • Laundry washing machine will refer to both a simple laundry washing machine and a laundry washing-drying machine.
  • Laundry washing machines generally comprise an external casing, or cabinet, provided with a washing tub which contains a rotatable perforated drum where the laundry is placed. A loading/unloading door ensures access to the drum.
  • Laundry washing machines typically comprise a water inlet circuit and a products supply unit for the introduction of water and treating products (i.e. detergent, softener, etc.) into the washing tub.
  • Known laundry washing machines are also provided with a draining device for draining washing liquid from the washing tub.
  • a complete washing program typically includes different phases during which the laundry to be washed is subjected to adequate treatments.
  • a washing program usually comprises a laundry wetting phase wherein a proper amount of water and detergent is introduced in the washing tub so that at the end of the phase the laundry is preferably completely soaked.
  • the washing program then typically proceeds with a main washing phase during which the drum is rotated and the water contained therein is heated to a predetermined temperature based on the washing program selected by the user.
  • a successive step of the washing program typically comprises a rinsing phase which usually comprises one or more rinsing cycles.
  • a rinsing cycle clean, rinse water is first added to the laundry, the drum is then rotated in a spinning phase to extract dirty water from the laundry and finally the dirty water extracted is drained from the washing tub to the outside.
  • a final spinning phase allows the extraction of the residual water contained in the wet laundry.
  • the drum is rotated at high speed to extract residual water from the laundry.
  • the water extracted during the final spinning phase is again drained from the washing tub to the outside.
  • a spinning phase in particular the final spinning phase, is controlled on the base of parameters calculated by the machine and/or selected by the user.
  • Control of a spinning phase typically relates to the rotating speed of the drum and/or duration of the spinning phase.
  • the spinning phase duration is preferably set according to one or more parameters like: the washing program selected by the user, the specific parameters selected by the user like the type of fabric (cotton, wool, synthetic, etc.), the weight of the load, the number of rinse cycles etc, or parameters calculated/estimated by the machine, for example the calculation/estimation of the load weight.
  • a drawback of known techniques derives from the fact that the real load weight does not usually correspond to the value inputted by the user and/or calculated/estimated by the machine.
  • the load weight for example, is typically a choice among three possible load weights (low, medium, high) and hence the user eventually indicates an approximative weight of the load.
  • the inputted load weight therefore sometimes diverges greatly from its real weight.
  • a total incorrect data may also be inputted into the machines by mistake by the user.
  • calculation and/or estimation of the load weight by the machine may not correctly correspond to the real weight of the laundry.
  • Incorrectness of the load weight may lead to a wrong spinning duration, which can be therefore longer or shorter than the expected optimal duration.
  • the optimal spinning duration may not be univocally evaluated since it strongly depends on the type of laundry and its water absorption rate.
  • Shorter duration of the spinning phase, in particular the final spinning phase, may lead to an undesired residual water in the laundry.
  • the object of the present invention is therefore to overcome the drawbacks posed by the known technique.
  • Applicant has found that by terminating a spinning phase in a washing program, for example by stopping the rotation of the washing drum, based on a parameter relating to the electric power absorbed by the electric motor rotating the washing drum, it is possible to reach the mentioned objects.
  • the present invention relates, therefore, to a method for washing laundry in a laundry washing machine of the type comprising:
  • the step d) of terminating the spinning phase comprises the action of stopping the rotation of the washing drum.
  • the step d) of terminating the spinning phase comprises the action of reducing the rotation speed of the washing drum from the target rotating speed.
  • the rotation speed of said washing drum is reduced at a value at which the laundry detaches from the inner side walls of the washing drum.
  • the step d) of terminating the spinning phase comprises the action of deactivating the electric motor.
  • said at least one parameter is calculated or detected or an estimated value.
  • the electric power is a calculated or a detected or an estimated value.
  • the electric power absorbed by the electric motor is the active electric power absorbed by the electric motor.
  • the minimum threshold value is comprised between 1 and 40 Watt/min, more preferably equal to 5 Watt/min.
  • the decreasing rate is evaluated at predetermined time intervals.
  • the minimum threshold value is a prefixed value.
  • the target rotating speed is a predetermined fixed speed or a value selected by the user through an interface or a value set according to the load weight.
  • the target rotating speed is the speed at which the laundry is stuck, or at least partially stuck, against the inner side wall of the washing drum by means of the centrifugal force.
  • the spinning phase is the final spinning phase of a washing program.
  • the step c) starts when the washing drum reaches the target rotating speed.
  • the said step c) starts at a predetermined period of time after activation of the electric motor in said step b) or at a predetermined period of time after said drum rotating speed reaches said target rotating speed.
  • the present invention has proved to be particularly advantageous when applied to laundry washing machines, as described below. It should in any case be underlined that the present invention is not limited to laundry washing machines. On the contrary, the present invention can be conveniently applied to laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry).
  • a laundry washing machine 1 is illustrated, in which a method according to a first preferred embodiment of the invention is advantageously implemented.
  • the laundry washing machine 1 comprises an external casing or housing 2, a washing tub 3, a container 4, preferably a perforated washing drum 4, where the laundry to be treated can be loaded.
  • the housing 2 is provided with a loading/unloading door 8 which allows access to the washing drum 4.
  • the washing tub 3 is preferably suspended in a floating manner inside the housing 2, advantageously by means of a number of coil springs and shock-absorbers, not illustrated.
  • a water supply circuit 5 is arranged in the upper part of the laundry washing machine 1 and is suited to supply water into the tub 3 from an external water supply line E.
  • the water supply circuit of a laundry washing machine is well known in the art, and therefore it will not be described in detail.
  • the water supply circuit 5 preferably comprises a controlled supply valve 5a which is properly controlled, opened and closed, during the washing program.
  • the laundry washing machine 1 advantageously comprises a removable drawer 6 provided with various compartments suited to be filled with treating agents (i.e. detergent, softener, rinse conditioner, etc.).
  • treating agents i.e. detergent, softener, rinse conditioner, etc.
  • the water is supplied into the washing tub 3 from the water supply circuit 5 by making it flow through the drawer 6 and then through a supply pipe 9.
  • the water which reaches the washing tub 3 can, in this case, selectively contain one of the products contained in the compartments of the drawer 6, or such water can be clean and in this case it may reach the washing tub 3 directly, preferably bypassing the compartments of the drawer 6.
  • a further separate water supply pipe can be provided, which supplies exclusively clean water into the washing tub 3.
  • the bottom region 3a of the tub 3 preferably comprises a seat 15, or sump, suitable for receiving a heating device 10.
  • the heating device 10 when activated, heats the liquid inside the sump 15.
  • Laundry washing machine 1 preferably comprises a water outlet circuit 25 suitable for withdrawing liquid from the bottom region 3a of the tub 3.
  • the water outlet circuit 25 preferably comprises a draining conduit 27, a draining pump 26 and an outlet pipe 28 ending outside the housing 2.
  • the water outlet circuit 25 preferably further comprises a filtering device 12 arranged between the draining conduit 27 and the draining pump 26.
  • the filtering device 12 is adapted to retain all the undesirable bodies (for example buttons that have come off the laundry, coins erroneously introduced into the laundry washing machine, etc.).
  • the draining conduit 27 connects the bottom region 3a of the tub 3 to the filtering device 12.
  • the filtering device 12 may be provided directly in the tub 3, preferably obtained in a single piece construction with the latter.
  • Activation of the drain pump 26 drains the liquid, i.e. dirty water or water mixed with washing and/or rinsing products, from the tub 3 to the outside.
  • the laundry washing machine 1 then preferably comprises one or more recirculation circuits, not illustrated, adapted to drain liquid from the bottom region 3a of the tub 3 and to re-admit such a liquid into another region of the tub 3.
  • laundry washing machine 1 comprises a device 19 suited to sense (or detect) the liquid level inside the tub 3.
  • the sensor device 19 preferably comprises a pressure sensor which senses the pressure in the tub 3. From the values sensed by the sensor device 19 it is possible to determine the liquid level of the liquid inside the tub 3.
  • laundry washing machine may preferably comprise (in addition to or as a replacement of the pressure sensor) a level sensor (for example mechanical, electro-mechanical, optical, etc.) adapted to sense (or detect) the liquid level inside the tub 3.
  • the washing drum 4 is rotated by an electric motor 40.
  • the electric motor 40 preferably transmits the rotating motion to the shaft 4a of the washing drum 4, advantageously by means of a belt/pulley system, as schematically illustrated in Figure 2 .
  • the electric motor 40 can be directly associated with the shaft 4a of the washing drum 4.
  • the electric motor 40 may be any suitable type of electric motor.
  • the electric motor 40 is a brushless electric motor.
  • the electric motor 40 preferably rotates the washing drum 4 at various speeds in either rotational directions.
  • Laundry washing machine 1 advantageously comprises a control unit 22 connected to the various parts of the laundry washing machine 1 in order to ensure its operation.
  • the control unit 22 is preferably connected to the water inlet circuit 5, the water outlet circuit 25, the recirculation circuits, the heating device 10 and the electric motor 40 moving the drum 4 and receives information from the various sensors provided on the laundry washing machine 1, like the pressure sensor 19, a temperature sensor, a washing drum speed sensor, etc.
  • control unit 22 provides motor control signals to rotate the washing drum 4 to a rotating speed Ws according to desired speed profiles during the washing program, as better described below.
  • control unit 22 preferably acquires and elaborates electric motor parameters, like the motor speed Ms, the current IMOT flowing therethrough, the electric motor voltage VMOT, direction, torque etc.. Such parameters may be preferably acquired by means of proper sensors, as known in the art.
  • control unit 22 While in the embodiment illustrated and described herein a unique control unit 22 is provided, it is clear that in different embodiments two or more control units may be provided, preferably interconnected therebetween.
  • a dedicated control unit 22' may be for example provided for controlling the electric motor 40, as indicated with a dashed box in Figure 2 .
  • the control unit 22 is advantageously connected also to an interface unit 22a which is accessible to the user and by means of which the user selects and sets the washing parameters from time to time, in particular the desired washing program.
  • other parameters can optionally be inserted by the user, for example the washing temperature, the spinning speed, the load in terms of weight of the laundry to be washed, the type of fabric of the load, etc.
  • the interface unit 22a preferably displays machine working conditions, such as the remaining cycle time, alarm signals, etc.
  • the interface unit 22a preferably comprises a display.
  • the laundry to be washed is first placed inside the washing drum 4 (step 100 of Figure 3 ).
  • the user selects the desired washing program (step 110) depending, for example, on the type and on the dirty-level of the products to wash.
  • the user it is possible for the user to insert some parameters directly by the interface unit 22a, for example the value of the washing temperature, the choice the load weight (low, middle, high) the rotating speed Ws of the washing drum 4 in the spinning phase, etc.
  • control unit sets the laundry washing machine 1 so that it starts the washing program.
  • the selection of the desired washing program may be performed before placing the laundry into the washing drum 4 (step 100). Successively, the washing program performs different phases for washing the laundry.
  • the washing program comprises a laundry wetting phase (step 120) wherein a proper amount of water and detergent is introduced in the washing tub 3 so that at the end of the phase the laundry is preferably completely soaked.
  • the washing drum 4 is preferably rotated at low speed (for example a speed value lower than 100 rpm).
  • the washing program then preferably proceeds with a main washing phase (step 130) during which the washing drum 4 is rotated and the water contained therein is heated to a predetermined temperature based on the washing program selected by the user.
  • the main washing phase (step 130) preferably terminates with a draining step wherein dirty water is extracted from the washing tub 3 to the outside, preferably through the water outlet circuit 25.
  • a successive step of the cycle preferably comprises a rinsing phase, globally indicated with 140, which usually comprises one or more rinsing cycles (steps 145).
  • a rinsing cycle 145 clean, rinse water is first added to the laundry (step 146), the washing drum 4 is then rotated to extract dirty water from the laundry (step 147), also indicated as short spinning phase, and the dirty water extracted from the laundry is drained from the washing tub 3 to the outside.
  • the washing drum speed Ws is preferably comprised between 150 and 2000 rpm.
  • the washing program preferably comprises a final spinning phase (step 150).
  • the washing drum 4 is rotated at high speed Ws (for example about 150-2000 rpm) to extract residual water from the laundry, as better illustrated in the following with respect to Figure 5 .
  • Ws for example about 150-2000 rpm
  • step 150 the washing program is completed. At this point, the user may take the laundry out.
  • the washing program is performed in a laundry washing-drying machine, after the final spinning phase, the laundry may be advantageously subjected to a drying phase inside the washing drum 4 (step 200 in Figure 3 ).
  • step 150 we will focus on the final spinning phase (step 150) according to an advantageous aspect of the invention.
  • FIG. 150 A preferred embodiment of the final spinning phase (step 150) of the invention is shown in detail in Figure 4 (indicated with block 150).
  • Figure 5 depicts the washing drum rotating speed Ws and the electrical power P absorbed by the electric motor 40 as a function of time in said final spinning phase (step 150).
  • the target rotating speed Wst is the speed required to extract the residual water from the laundry.
  • the laundry is typically stuck, or at least partially stuck, against the inner side wall of the washing drum 4 by means of the centrifugal force.
  • the laundry is therefore displaced so as to form an inner cavity substantially at the central area of the washing drum 4.
  • the target rotating speed Wst is a predetermined fixed speed, preferably a speed comprised between 800 and 1500 rpm.
  • the target rotating speed Wst may be set by the user through the interface 22a, as explained above with reference to step 110 of the method.
  • the target rotating speed Wst may be differently set.
  • the target rotating speed Wst may be set according to the load weight, being the load weight either preferably selected by the user or estimated by the machine.
  • drum rotating speed Ws may be directly detected through a dedicated sensor associated to the washing drum 4.
  • the drum rotating speed Ws is preferably obtained indirectly by knowing the motor speed Ms.
  • the electric motor 40 is preferably driven at its maximum power Pmax, for example at a value preferably comprised between 200 and 2000 Watt, more preferably at 1500 Watt.
  • control unit 22 provides motor control signals to maintains the washing drum 4 at the target rotating speed Wst.
  • the electric motor 40 is preferably driven at its maximum power Pmax during all the time interval t1 ⁇ t2.
  • the drum rotating speed Ws preferably linearly increases during the time interval t1 ⁇ t2.
  • the electric motor 40 may be differently driven to bring the rotation speed Ws of the washing drum 4 to the target rotating speed Wst.
  • the electric motor 40 may be driven intermittently until the drum rotating speed Ws reaches the target rotating speed Wst.
  • the drum rotating speed Ws may therefore not increase linearly, but with a different trend over the time.
  • the motor electrical power P absorbed by the electric motor 40 falls rapidly from its maximum value Pmax to a lower power Pi, for example at a value comprised between 50 and 1000 Watt, more preferably at 700 Watt.
  • the electric power decreasing rate Dpr is monitored (step 162).
  • the power P absorbed by the electric motor 40 is calculated from values of the current IMOT flowing through the electric motor 40 and the electric motor voltage VMOT applied to the same.
  • said values are acquired by respective sensors.
  • the power P absorbed by the electric motor 40 is obtained by a dedicated motor power sensor.
  • the value of the current IMOT and/or the value of the motor voltage VMOT and/or the value of the electric power P of electric motor 40 may be obtained by means of an estimation process.
  • the electric power P absorbed by the electric motor 40 preferably is the active power absorbed by the electric motor 40 (Watt).
  • the electric power P may be of different type, for example the average active electric power in a predetermined time interval or the reactive electric power.
  • the electric motor 40 is driven to maintain the drum rotating speed Ws at the target rotating speed Wst (step 166).
  • the applicant has established that the end of the final spinning phase (Electric motor OFF, step 168) takes place when the electric power decreasing rate Dpr is below, or equal to, a minimum threshold value ⁇ Pr.
  • the washing program can be considered terminated and the user may take the laundry out.
  • the minimum threshold value ⁇ Pr is comprised between 1 and 40 Watt/min.
  • the minimum threshold value ⁇ Pr may be opportunely set according to different parameters, like for example the size/diameter of the washing drum, the type of laundry to be washed, the load in terms of weight of the laundry to be washed (either estimated or selected by the user through the interface unit), etc.
  • duration of the final spinning does not depend on parameters calculated/estimated by the machine and/or parameters selected by the user.
  • Figure 6 illustrates a preferred embodiment for monitoring the power decreasing rate in a final spinning phase (step 150') according to the invention.
  • Phases and/or steps with the same reference numbers of the embodiment previously described correspond to respective phases and/or steps previously described and, therefore, are not described in detail hereinafter.
  • step 152 the electric motor 40 is activated to bring the rotating speed Ws of the washing drum 4 to a target rotating speed Wst.
  • the electric power decreasing rate Dpr is monitored.
  • two temporary variables P1 and P2 are used to calculate the power decreasing rate Dpr.
  • the first temporary variable P1 is set to value Pi.
  • a predetermined time interval ⁇ tw is waited (step 161) and then the second temporary variable P2 is set with the electric power P absorbed by the electric motor 40 (step 163).
  • the predetermined time interval ⁇ tw is preferably a fixed value, for example a value preferably comprised between 1 and 30 sec.
  • the electric motor 40 is driven to maintain the drum rotating speed Ws at the target rotating speed Wst (step 166).
  • the first temporary variable P1 is then set with the second temporary variable P2 and back to the step 161.
  • the washing program can be considered terminated and the user may take the laundry out.
  • the minimum threshold value ⁇ P may be opportunely set according to different parameters, like for example the size/diameter of the washing drum, the type of laundry to be washed, the load in terms of weight of the laundry to be washed (either estimated or selected by the user through the interface unit), etc.
  • the decreasing rate of the electric power is evaluated as the decreasing of the electric power over successive predetermined time intervals ⁇ tw, i.e. (P2-P1)/ ⁇ tw.
  • the predetermined time interval ⁇ tw is preferably a fixed value and hence the decreasing of the electric power is evaluated over successive predetermined equal time intervals ⁇ tw.
  • evaluation of the decreasing rate may be carried out over successive predetermined time intervals having different durations between them.
  • ending of the spinning phase depends on the trend of the electric power over the time, preferably when the electric power decreasing rate is below, or equal to, a minimum threshold value.
  • ending of the spinning phase may depend on the trend of one or more parameters relating to the electric power absorbed by the electric motor.
  • ending of the spinning phase may depend on the current decreasing rate of the current IMOT flowing through the electric motor.
  • the motor voltage VMOT has a known predetermined voltage wave shape or an estimated voltage wave shape.
  • the present invention allows all the set objects to be achieved.
  • it makes it possible to control the optimal duration of the spinning phase.
  • the method according to the invention can be advantageously applied to any spinning phase of the washing program.
  • control of the spinning phase duration may be applied to short spinning phases during the rinse cycle(s).
  • the spinning phase may preferably terminate by stopping the rotation of the washing drum or, alternatively, it may preferably terminate by reducing the rotation speed of the washing drum.
  • the rotation speed of the washing drum may be reduced at a value at which the laundry detaches from the inner side walls of the washing drum.

Claims (14)

  1. Verfahren zum Waschen von Wäsche in einer Wäschewaschmaschine (1) des Typs, der umfasst:
    - einen Laugenbehälter (3), der eine drehbare Waschtrommel (4) umschließt, die ausgelegt ist, um waschende Wäsche aufzunehmen;
    - einen Elektromotor (40), der mit der Waschtrommel (4) verbunden ist, um die Waschtrommel (4) zu drehen; wobei das Verfahren mindestens eine Schleuderphase zum Extrahieren von Flüssigkeit aus der Wäsche umfasst, während der die Waschtrommel (4) mittels des Elektromotors (40) gedreht wird, wobei die Schleuderphase die folgenden Schritte umfasst:
    a) Aktivieren des Elektromotors (40), um die Drehzahl (Ws) der Waschtrommel (4) auf eine Zieldrehzahl (Wst) zu erhöhen;
    b) Drehen der Waschtrommel (4) bei der Zieldrehzahl (Wst);
    c) Überwachen mindestens eines Parameters, der mit der durch den Elektromotor (40) aufgenommenen elektrischen Leistung (P) übereinstimmt;
    dadurch gekennzeichnet, dass das Überwachen mindestens eines Parameters, der mit der durch den Elektromotor (40) aufgenommenen elektrischen Leistung (P) übereinstimmt, Überwachen einer Verringerungsrate der elektrischen Leistung (P) umfasst, und dadurch, dass das Verfahren den folgenden Schritt umfasst:
    d) Beenden der Schleuderphase, wenn die überwachte Verringerungsrate der elektrischen Leistung (P) sich bei einer Verringerungsrate (Dpr) verringert, die unterhalb oder gleich einem Mindestschwellenwert (ΔPr) ist.
  2. Verfahren nach Anspruch 1, wobei der Schritt d) des Beendens der Schleuderphase die Aktion Anhalten der Drehung der Waschtrommel (4) umfasst.
  3. Verfahren nach Anspruch 1, wobei der Schritt d) des Beendens der Schleuderphase die Aktion Reduzieren der Drehzahl (Ws) der Waschtrommel (4) von der Zieldrehzahl (Wst) umfasst.
  4. Verfahren nach einem der vorangehenden Ansprüche, wobei der Schritt d) des Beendens der Schleuderphase die Aktion Deaktivieren des Elektromotors (40) umfasst.
  5. Verfahren nach einem der vorangehenden Ansprüche, wobei der mindestens eine Parameter ein berechneter oder detektierter oder ein geschätzter Wert ist.
  6. Verfahren nach Anspruch 1, wobei die elektrische Leistung (P) ein berechneter oder ein detektierter oder ein geschätzter Wert ist.
  7. Verfahren nach Anspruch 1 oder 6, wobei die durch den Elektromotor (40) aufgenommene elektrische Leistung (P) die durch den Elektromotor (40) aufgenommene elektrische Wirkleistung (P) ist.
  8. Verfahren nach einem der Ansprüche 1 bis 7, wobei der Mindestschwellenwert (ΔPr) zwischen 1 und 40 Watt/min, vorzugsweise gleich 5 Watt/min, beträgt.
  9. Verfahren nach einem der vorangehenden Ansprüche, wobei die Verringerungsrate (Dpr) bei vorbestimmten Zeitintervallen (Δtw) ausgewertet wird.
  10. Verfahren nach einem der vorangehenden Ansprüche, wobei der Mindestschwellenwert (ΔPr) ein vorab festgelegter Wert ist.
  11. Verfahren nach einem der vorangehenden Ansprüche, wobei die Zieldrehzahl (Wst) eine vorbestimmte festgelegte Drehzahl oder ein Wert, der durch den Benutzer über eine Schnittstelle (22a) ausgewählt wird, oder eine Wertemenge gemäß dem Beladungsgewicht ist.
  12. Verfahren nach einem der vorangehenden Ansprüche, wobei die Schleuderphase die abschließende Schleuderphase eines Waschprogramms ist.
  13. Verfahren nach einem der vorangehenden Ansprüche, wobei der Schritt c) beginnt, wenn die Waschtrommel (4) die Zieldrehzahl (Wst) erreicht.
  14. Verfahren nach einem der Ansprüche 1 bis 12, wobei der Schritt c) bei einer vorbestimmten Zeitdauer nach Aktivierung des Elektromotors (40) im Schritt b) oder bei einer vorbestimmten Zeitdauer, nachdem die Trommeldrehzahl (Ws) die Zieldrehzahl (Wst) erreicht, beginnt.
EP17194511.6A 2017-10-03 2017-10-03 Verfahren zum waschen von wäsche in einer wäschewaschmaschine Active EP3467181B1 (de)

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Application Number Priority Date Filing Date Title
EP17194511.6A EP3467181B1 (de) 2017-10-03 2017-10-03 Verfahren zum waschen von wäsche in einer wäschewaschmaschine

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EP17194511.6A EP3467181B1 (de) 2017-10-03 2017-10-03 Verfahren zum waschen von wäsche in einer wäschewaschmaschine

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EP3467181B1 true EP3467181B1 (de) 2021-09-22

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DE4243621A1 (de) * 1992-12-22 1994-06-23 Bosch Siemens Hausgeraete Verfahren zum Schleudern von Wäsche in einer automatisch gesteuerten Trommelwaschmaschine
US7591038B2 (en) * 2003-04-28 2009-09-22 Emerson Electric Co., Method and system for operating a clothes washing machine
US10017892B2 (en) * 2014-02-21 2018-07-10 Samsung Electronics Co., Ltd. Washing apparatus and controlling method thereof

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