EP4063552B1 - Waschmaschine mit wäschemassenbestimmungsmenge - Google Patents

Waschmaschine mit wäschemassenbestimmungsmenge Download PDF

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Publication number
EP4063552B1
EP4063552B1 EP22161448.0A EP22161448A EP4063552B1 EP 4063552 B1 EP4063552 B1 EP 4063552B1 EP 22161448 A EP22161448 A EP 22161448A EP 4063552 B1 EP4063552 B1 EP 4063552B1
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EP
European Patent Office
Prior art keywords
linen
inrush
steps
electric motor
stp
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EP22161448.0A
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English (en)
French (fr)
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EP4063552A1 (de
Inventor
Antonio ACRI
Fabio GRAZIOTTIN
Massimo DUGO
Alessandro Malacrida
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Candy SpA
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Candy SpA
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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • 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
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • D06F2103/46—Current or voltage of the motor driving the drum
    • 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 
    • D06F33/46—Control of the energy or water consumption
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/48—Control of the energy consumption

Definitions

  • the present invention relates to a household appliance for the rotary treatment of linen, in particular a washing machine, dryer, or washer-dryer machine
  • Domestic washing machines comprise a supporting and housing structure, inside which a washing tub is housed provided with a front opening closable by a porthole door frontally hinged to the housing.
  • a drum for accommodating the linen to be washed is arranged inside the washing tub in a rotatable manner about a horizontal or inclined axis. The drum, too, delimits a front opening positioned at the opening of the washing tub, to allow the loading and unloading of the linen.
  • the washing tub is adapted to contain the washing liquid during the linen washing steps.
  • a washing water loading system which is connectable to the water supply network.
  • a drain duct is provided on the bottom of the washing tub, associated with a drain pump, which removes the washing liquid from the washing tub and which controls, together with the loading system, the level of liquid inside the washing tub.
  • the detergent tray may be configured as a drawer which can be extracted from and inserted into the housing structure and which can be filled manually for each wash with an amount of detergent and/or treatment additive sufficient for a single washing cycle.
  • Washing machines with so-called “multiple dispensing" washing substance dispensing and dosing systems are also known configured to contain an amount of treatment substance sufficient for a plurality of washing cycles and to automatically dispense a controlled dose of treatment substance for each washing cycle.
  • an electrical resistor is provided, arranged inside the washing tub, in the gap between the wall of the washing tub and the linen drum.
  • washing machines To reduce the consumption of water and detergent, it is known to equip washing machines with recirculation systems which remove the washing liquid from the bottom of the washing tub (where it accumulates even before touching the linen in the drum) and reintroduce it into the linen drum, so that a reduced volume of liquid is repeatedly poured on the linen to be washed.
  • Recirculation systems usually comprise a recirculation duct which extends outside the washing tub from a lower opening of the washing tub (for drawing the liquid to be recirculated) to an upper opening of the washing tub (for reintroducing the recirculated liquid), as well as an electric recirculation pump or ejector.
  • Some washing machines comprise a sensor to detect the linen load and a control device which controls the execution of a washing program also depending on the detected linen load.
  • the linen load is detected during the execution of a washing program which has already started, e.g. by monitoring the water absorption in the linen or by force sensors interposed between the washing tub and the housing.
  • the detection of the linen load is intertwined with the progress of the washing program itself, and the result of the linen load detection influences the further progress of the washing program, without the possibility of user intervention, e.g. for adjusting the detergent dosage by the user, an additional filling with additional linen items or a withdrawal of a part of the linen to reduce the linen load.
  • linen load is usually detected when the linen is already wet and not when it is dry, making it further difficult for the user to take corrective action.
  • the linen load detection procedures are complex or require expensive detectors, and their repetitive performance in the various steps of the washing procedures takes an undesirably long time, and the result of the linen load detection is subject to many uncertainties due to the many influencing factors which cannot be predicted with certainty, e.g., the distribution of the linen inside the drum, the degree and unevenness of water absorption in the linen, the amount of water in the washing tub, etc.
  • US2011/202303A1 and D2 EP3162943 A1 describe closest prior art washing machines and linen load detection methods.
  • a rotary linen treatment household appliance configured to perform a linen treatment involving rotary agitation of the linen, such as a washing and/or drying treatment, according to the independent claim.
  • the dependent claims relate to advantageous and preferred embodiments of the invention.
  • a washing machine comprises:
  • the linen is neither wet nor subject to treatment substances, detergent, etc., allowing the user to freely set or vary the parameters of the washing program, including the start time, taking into account the suggestion of quantity and/or type of detergent generated through the user interface, but completely free from any constraints given by a possible treatment of the linen already started.
  • a washing machine comprises:
  • the inrush current of the electric motor can be considered either solely or predominantly correlated to the mass inertial moment of the assembly formed by the drum and the linen contained therein. This simplifies the correlation of the mass inertial moment, and thus the mass itself, with the detected motor current, allowing a more accurate, reliable, and rapid determination of the linen mass.
  • the linen mass can be determined with dry linen and independently of a specific washing or drying program or a specific step in a washing or drying program.
  • a washing machine 1 or washer-dryer comprises a supporting and housing structure 2, inside which a washing tub 3 is housed, provided with an opening (either frontal or peripheral) closable by a door 4 (e.g. a porthole door) hinged either frontally or on top to the housing 2.
  • a linen drum 5 for accommodating the linen to be washed 3 is housed inside the washing tub in a rotatable manner about a rotation axis R-R, e.g. horizontal or inclined.
  • the linen drum 5 may also delimit a front opening positioned at the opening of the washing tub 3 or a peripheral closable opening, to allow loading and unloading the linen.
  • the washing machine comprises a linen treatment system 3, 6, 7, 8, 9, 12, 13, 18, 20, 21 of the linen configured to perform one or more treatment steps on the linen inside the linen drum 5, in particular, linen washing steps by means of soaking in water and detergent and/or linen drying steps by means of forced ventilation.
  • the washing tub 3 is adapted to contain the washing liquid during the linen washing steps.
  • a water loading system 6 connectable to the water mains is provided to allow loading the washing tub 3 with water from the mains.
  • the loading system 6 may comprise a plurality of ducts which extend from, for example, one or more, for example, two, supply solenoid valves 7, 8, either directly or through detergent compartments of a detergent tray 9 to the washing tub 3.
  • a draining duct 11 is connected to the bottom 10 of the washing tub 3 with associated draining pump 12 which removes the washing liquid from the washing tub 3 and which controls, together with the supply solenoid valves 7, 8, the liquid level inside the washing tub 3.
  • An electric resistor 13 may be provided inside the washing tub 3, in particular, arranged on the washing tub bottom 10, in the gap between the wall of the washing tub 3 and the linen drum 5 for heating the washing liquid contained in the washing tub 3.
  • the washing machine 1 may further comprise a dispensing system 18 of the "multiple dosing" type for dispensing linen treatment substances.
  • the dispensing system 18 comprises, for example, a plurality of tanks 19 to contain the treatment substances, e.g. detergent for resistant white items, detergent for delicate colored items, detergent for wool, perfuming substances, enzymes, fixing substances and/or fabric softener.
  • the plurality of tanks 19 may be, for example, positioned in the porthole door 4, in the detergent compartment 9, or in the housing 2, and the single tanks 19 are dimensioned each to contain a volume of the treatment substance sufficient for a plurality of washing cycles.
  • the washing machine 1 may further comprise a system 20 for recirculating the washing liquid from the bottom 10 of the washing tub to the linen drum 5.
  • the washing machine 1 may further comprise a drying system 21, e.g. a drying air circuit 22 having conveying means 23, air heating means 24, and moisture condensing means 25 of the conveyed air.
  • a drying system 21 e.g. a drying air circuit 22 having conveying means 23, air heating means 24, and moisture condensing means 25 of the conveyed air.
  • the linen drum 5 can be actuated in rotation by an electric motor 14 and a transmission 15, e.g. a belt.
  • the operation of the washing machine 1 is controlled by an electronic control system 16 in signal connection with the electric motor 14, with the treatment system 3, 6, 7, 8, 9, 12, 13, 18, 20, 21 and with a user interface 17 for the selection of a treatment program from a plurality of treatment programs.
  • the user interface 17 may be positioned at an exterior wall or port 4 of the housing 2, or at an electronic device separate from the housing 2.
  • the control unit 16 drives the various components of the washing machine 1 for automatically washing and/or drying the linen.
  • the electronic control system 16 is configured to control the electric motor 14 and the treatment system 3, 6, 7, 8, 9, 12, 13, 18, 20, 21 depending on the treatment program selected by means of the user interface.
  • the electronic control system 16 comprises a module 26 for determining the linen mass contained in the linen drum 5, and the user interface 17 is configured for entering a linen mass determination command without performing the aforesaid treatment steps.
  • the electronic control system 16 In response to the entry of the command for determining the linen mass without performing the treatment steps, the electronic control system 16:
  • the electronic control system 16 puts the washing machine 1 in a standby configuration during which:
  • the linen is neither wet nor subject to treatment substances, detergent, etc., allowing the user to freely set or vary the parameters of the washing program, including the start time, taking into account the suggestion of quantity and/or type of detergent generated through the user interface 17, but completely free from any constraints given by a possible treatment of the linen already started.
  • the electronic control system 16 controls the user interface 17 to generate a request for the user to enter the command for determining the linen mass before entering a command to start any washing program.
  • the electronic control system 16 is configured to complete the procedure for determining the linen mass and generating the notification containing the suggestion for quantity and/or type of detergent in less than two minutes, preferably less than one minute.
  • This speed of response positively biases the user behavior and contributes to more optimal and economical use of detergent.
  • control system 16 generates a quantitative detergent indication depending on the determined linen mass, and the user interface displays said quantitative detergent indication.
  • control system 16 generates the quantitative detergent indication also depending on technical detergent data, stored in a memory of the electronic control system 16, on water hardness data, which are pre-set or may be entered by the user and, optionally, on dirt intensity data which can be entered by the user.
  • control system 16 generates the quantitative detergent indication also depending on different detergent types (e.g. liquid, powder) either selectable or settable by the user, or generates and displays (e.g. at the same time) a plurality of quantitative detergent indications in association with a plurality of different detergent types.
  • different detergent types e.g. liquid, powder
  • the quantitative indication of detergent includes the possibility of indicating four different detergent levels. This simplification makes the indication intuitive and immediately understandable.
  • the linen mass determination command which can be entered in the user interface 17 is configured as a command for determining an amount of detergent for the linen load in the linen drum 5.
  • the electronic control system 16 is configured to:
  • linen mass calculation result can be advantageously correlated not only to the amount of detergent required, but also to the amount of water, washing/drying times and temperatures, and spin speeds.
  • the electronic control system 16 comprises a module 26 for determining the linen mass contained in the linen drum 5, configured to:
  • inrush events i.e., acceleration events of the motor 14 (and the linen drum 5) from a static condition to a maximum rotational speed
  • a predetermined, e.g., constant, rotational acceleration ramp the inrush current of the electric motor 14 can be considered either solely or predominantly correlated to the mass inertial moment of the assembly of linen drum 5 and the linen contained therein. This simplifies the correlation of the mass inertial moment, and thus the mass itself, with the detected motor current 14, allowing a more accurate, reliable, and rapid determination of the linen mass.
  • the linen mass can be determined with dry linen and independently of a specific washing or drying program or a specific step in a washing or drying program.
  • the linen mass determination module 26 is configured to:
  • this allows taking account of temperature-dependent changes in the electrical characteristics of the electric motor 14, thereby increasing the linen mass determination accuracy.
  • the linen mass determination module 26 is configured to:
  • the angular acceleration is predetermined, e.g., constant or substantially constant over the entire extent of the detection interval, and repeated in a consistently equal manner for all consecutive detection time intervals.
  • the linen mass determination module 26 is configured to:
  • the linen mass determination module 26 is configured to compare (step STP_5A) an ohmic resistance parameter R (dependent on the detected ohmic resistance value R or an average ohmic resistance value R_avg), with a predetermined ohmic resistance threshold value R_0 (based on a default characterization (of the motor 14 and the washing machine 1 during their manufacturing) and, if the ohmic resistance parameter R exceeds the predetermined threshold value R_0, performing said second sequence of additional consecutive inrush steps.
  • a predetermined ohmic resistance threshold value R_0 based on a default characterization (of the motor 14 and the washing machine 1 during their manufacturing
  • the second sequence of additional inrush steps may hence be necessary, independently , either based on the detected resistance criterion or based on the calculated rotational power parameter criterion.
  • the linen mass determination module 26 is configured to:
  • the inclusion of the ohmic resistance R of the motor 14, in the calculation of the linen mass M allows taking into account variations in the electrical behavior of the motor 14 due, for example, to temperature variations (cold motor, very hot motor) and, therefore, to increase the accuracy and reliability of the result of the linen mass determination.
  • the linen mass determination module 26 is configured to:
  • the linen in the linen drum 5 is singled out and redistributed, thereby increasing the likelihood of a more homogeneous distribution of the overall rotating mass, and thus more representative detection results.
  • the number n, e.g., ten, of consecutive inrush steps of the first sequence is greater than the number m, e.g., six, of additional inrush steps of the second sequence and, possibly less than twice the number m of additional inrush steps of the second sequence.
  • the average value P_avg of the rotational power parameters P calculated for the first inrush step sequence and the additional average value P_avg_1 of the rotational power parameters P_1 calculated for the second additional inrush step sequence are to be weighted, or are weighted average values, according to the ratio of the number of inrush steps n to the number of additional inrush steps m (step STP_13).
  • the rotational power parameter is an integral, calculated numerically by a summation, of a product of a torque parameter T dependent on the detected inrush current I_inrush and a motion parameter Mov (kinematic parameter) of the motor, in a motion domain, e.g. in the time domain, cumulative (angular) position, or (angular) speed.
  • the torque parameter T may be, for example, a value of power absorbed by the electric motor 14, such as an average power value, for each numerical summation step.
  • the motion parameter Mov may be, for example, the speed (angular or expressed in rpm) or a speed increment (angular or expressed in rpm) of the motor 14 for each numerical summation step.
  • the rotational power parameter is not an expression of instantaneous power, but of the kinematic energy of the moving system.
  • the calculation of the average value P_avg, P_1_avg of the rotational power parameters P, P_1 excludes the two calculated minimum and maximum extremal values, namely the minimum rotational power parameter P_min, P_1_min, and the maximum rotational power parameter P_max, P_1_max.
  • the calculation of the average value R_avg, R_1_avg of the ohmic resistances R, R_1 of motor 14 excludes the two detected minimum and maximum extremal values, namely the minimum ohmic resistance R_min, R_1_min and the maximum ohmic resistance R_max, R_1_max.
  • the linen mass determination module 26 is configured to compare an ohmic resistance parameter R (dependent on the detected ohmic resistance value R, R_1 or an average ohmic resistance value R_avg, R_1_avg, preferably a weighted average ohmic resistance value depending on the ratio of the number of inrush steps n and additional inrush steps m) with a predetermined ohmic resistance threshold value R_0 (based on a default characterization of the motor 14 and the washing machine 1 during manufacturing) and, if the ohmic resistance parameter R exceeds the predetermined threshold value R_0, reduce the calculated linen mass M depending on the detected ohmic resistance, in particular depending on the ohmic resistance parameter R.
  • a predetermined ohmic resistance threshold value R_0 based on a default characterization of the motor 14 and the washing machine 1 during manufacturing
  • the linen mass determination module 26 may be configured to detect, through a temperature sensor, the temperature of the motor 14 and the calculation of the linen mass M takes place also depending on the detected temperature of the motor 14.
  • the motor inrush current is the name given to the peak current used in an electric motor to increase its speed from a static condition (i.e. accelerate from 0 rpm).
  • the motor inrush current is assumed to be related to the inertia, thus the mass of a rotating object according to the following equation: I inrush ⁇ 2 J m d ⁇ m dt + T d + B m ⁇ m 3 p ⁇ mg wherein:
  • the inrush current of the motor is assumed to be solely related to inertia (i.e., rotating mass).
  • the method implemented according to the invention correlates the inrush event with the mass within the drum.
  • the calculated linen mass value can be advantageously correlated to the amount of detergent needed and sufficient, i.e. optimal.
  • the speed profile of a multiple measurement scheme will be similar to a sawtooth profile.
  • Motor actuation (STP_1; STP_8): Motor actuation 14, starting from a stationary condition (initial speed v_init is equal to 0 rpm) with constant acceleration. Actuation interruption of the motor 14 as soon as the linen drum speed 5 is equal to the maximum speed v_max. Afterward, deceleration from maximum speed v_max to 0rpm.
  • Entity detection STP_2; STP_9): During the inrush step, detection and storage of the following variables time t, motor speed v_mot, inrush current I_inrush of motor 14, motor 14 ohmic resistance R.
  • time t time t
  • motor speed v_mot inrush current I_inrush of motor 14
  • motor 14 ohmic resistance R motor speed v_drum
  • v_drum v_mot
  • Parameter calculation (STP_3; STP_10): A rotational power quantity calculated from the measured variables is integrated through numerical summation, in a motion domain, e.g., the speed domain.
  • the integral should extend precisely from the initial condition to the final condition of the detection interval. This may require an interpolation procedure.
  • the average R_avg value of the detected ohmic resistances is also calculated.
  • the average value R_avg of the electrical resistance (affected by motor temperature) is compared with the threshold value of ohmic resistance R_0 (predetermined value based on characterization tests of the washing machine 1), and two conditions may occur:
  • the procedure proceeds by calculating the linen mass M (STP_13).
  • the second sequence of inrush steps is run (STP_6 and following, right side in Figure 3 ).
  • Linen agitation Before starting the second sequence of inrush steps, redistribute the linen within the linen drum 5 and change the initial measurement position by rotating the linen drum 5 in the opposite direction to its rotation during the first sequence of inrush steps, e.g. for 10 seconds and e.g. with a rotational speed of the linen drum 5 between 40 rpm and 80 rpm.
  • the average R_avg_1 value of the detected additional ohmic resistances is also calculated.
  • the total average value R_tot_avg of electrical resistance is compared with the threshold value of ohmic resistance R_0, and two conditions can occur:
  • Detergent notification generation Based on the calculated (dry) linen mass M, the detergent suggestion notification described above is generated.
  • the described predetermined constant parameters can have values in the following ranges: DEV _limit can take a numeric value between 300 and 700.
  • the constant rotational acceleration can be 50rpm/sec.
  • the maximum rotational speed of drum 5 can be 80rpm.
  • the upper limit v_limit rotational speed of the linen drum 5 can be 60rpm.
  • the parameter A can be a numeric value between 0 and 10000.
  • the parameter B can be a numeric value between 0 and 10000.
  • the parameter R_0 can be an average ohmic resistance value measured during the characterization of the washing machine 1, e.g. in the order of magnitude of the detected ohmic resistance values.
  • the parameter P_0 can be a numeric value between 0 and 10000.

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

Claims (12)

  1. Waschmaschine (1), umfassend:
    - ein Gehäuse (2),
    - eine Wäschetrommel (5) zum Aufnehmen der zu waschenden Wäsche, welche rotierbar um eine Rotationsachse (R-R) getragen ist, wobei die Wäschetrommel (5) eine Ladeöffnung begrenzt, welche mittels einer Tür (4) verschließbar ist, welche mit dem Gehäuse (2) verbunden ist, für das Beladen und Entladen der zu waschenden Wäsche,
    - einen Elektromotor (14), welcher betriebsmäßig mit der Wäschetrommel (5) verbunden ist, um die Wäschetrommel (5) um die Rotationsachse (R-R) zu rotieren,
    - ein Wäsche-Behandlungssystem (3, 6, 7, 8, 9, 12, 13, 18, 20, 21), welches dazu eingerichtet ist, auf die Wäsche innerhalb der Wäschetrommel (5) einen oder mehrere Behandlungsschritte auszuführen, welche von der Rotation der Wäschetrommel (5) verschieden sind, umfassend Wäsche-Waschschritte mittels eines Einweichens in Wasser und Waschmittel und/oder Wäsche-Trocknungsschritte mittels Ventilation,
    - ein elektronisches Steuersystem (16) in Signalverbindung mit dem Elektromotor (14), mit dem Behandlungssystem (3, 6, 7, 8, 9, 12, 13, 18, 20, 21) und mit einer Benutzerschnittstelle (17) für die Auswahl eines Behandlungsprogramms aus einer Mehrzahl von Behandlungsprogrammen, wobei das elektronische Steuersystem (16) dazu eingerichtet ist, den Elektromotor (14) und das Behandlungssystem (3, 6, 7, 8, 9, 12, 13, 18, 20, 21) abhängig von dem Behandlungsprogramm zu steuern, welches mittels der Benutzerschnittstelle (17) ausgewählt wird,
    wobei das elektronische Steuersystem (16) ein Modul (26) zum Bestimmen der Masse (M) der Wäsche umfasst, welche in der Wäschetrommel (5) aufgenommen ist, dadurch gekennzeichnet, dass das Modul (26) eingerichtet ist für:
    A) Durchführen einer ersten Sequenz von aufeinanderfolgenden Anlaufschritten, wobei jeder Anlaufschritt umfasst:
    - Betätigen des Motors zum Beschleunigen der Wäschetrommel in Rotation von einer anfänglichen Geschwindigkeit (v_init) gleich null zu einer maximalen vorbestimmten Geschwindigkeit (v_max) mit einer vorbestimmten Beschleunigung (STP_1),
    - auf ein Erreichen der vorbestimmten maximalen Geschwindigkeit (v_max) hin, Veranlassen des Motors dazu, zu verlangsamen, so dass die Wäschetrommel (5) veranlasst wird, abzubremsen, bis die anfängliche Geschwindigkeit (v_init) erneut erreicht wird, welche gleich null ist,
    - in einem Detektion-Zeitintervall während der Beschleunigung der Wäschetrommel in Rotation von der anfänglichen Geschwindigkeit (v_init) gleich null bis hin zu der vorbestimmten maximalen Geschwindigkeit (v_max), Detektieren des Anlaufstroms (I_inrush), welcher von dem Elektromotor (14) aufgenommen wird, der Rotationsgeschwindigkeit (v) des Elektromotors (14) und der Zeit (t) (STP_2),
    B) Berechnen für jeden individuellen Anlaufschritt eines Rotationsleistung-Parameters (P), welcher durch den Elektromotor (14) erzeugt wird, abhängig von dem Anlaufstrom (I_inrush) (STP_3),
    C) Berechnen für die gesamte erste Sequenz von aufeinanderfolgenden Anlaufschritten eines durchschnittlichen Werts (P_avg) der Rotationsleistung-Parameter (P), welche für die individuellen Anlaufschritte berechnet werden (STP_5),
    D) Bestimmen der Masse (M) der Wäsche in der Wäschetrommel (5) abhängig von dem durchschnittlichen Wert (P_avg) der Rotationsleistung-Parameter (P) und vorbestimmten Parametern (P_0, A), wobei die Bestimmung der Masse (M) der Wäsche mit der trockenen Wäsche stattfindet und ungeachtet eines spezifischen Wasch- oder Trocknungsprogramms.
  2. Waschmaschine (1) nach Anspruch 1, wobei das Modul (26) zum Bestimmen der Masse der Wäsche eingerichtet ist für:
    - in dem Detektion-Zeitintervall während des Beschleunigens der Wäschetrommel (5) in Rotation von der anfänglichen Geschwindigkeit (v_init) gleich null bis hin zu der vorbestimmten maximalen Geschwindigkeit (v_max) ebenfalls Detektieren des Ohm'schen Widerstands (R) des Elektromotors (14),
    C1)Berechnen für die gesamte erste Sequenz von aufeinanderfolgenden Anlaufschritten eines durchschnittlichen Werts (P_avg) der Ohm'schen Widerstände (R) des Elektromotors (14), welche für die individuellen Anlaufschritte detektiert werden (STP_5),
    D1)Bestimmen der Masse (M) der Wäsche in der Wäschetrommel (5) ebenfalls abhängig von dem durchschnittlichen Wert (R_avg) der detektierten Ohm'schen Widerstände (R) des Elektromotors (14) (STP_13).
  3. Waschmaschine (1) nach einem der vorhergehenden Ansprüche, wobei das Modul (26) zum Bestimmen der Wäschemasse eingerichtet ist für:
    - Einschließen in der Berechnung des Rotationsleistung-Parameters (P) für den individuellen Anlaufschritt der Werte des Anlaufstroms (I_inrush), der Rotationsgeschwindigkeit (v) des Motors und der Zeit (t), welche beginnend von der anfänglichen Geschwindigkeit (v_init) der Wäschetrommel (5) gleich null detektiert werden, jedoch mit dem Elektromotor (14) mit Energie beaufschlagt, bis eine obere Grenz-Rotationsgeschwindigkeit (v_limit) der Wäschetrommel (5) erreicht wird, welche niedriger als die vorbestimmte maximale Rotationsgeschwindigkeit (v_max) ist.
  4. Waschmaschine (1) nach einem der vorhergehenden Ansprüche, wobei das Modul (26) zum Bestimmen der Wäschemasse eingerichtet ist für:
    - Durchführen einer statistischen Verifizierung über die Detektions- und Berechnungsergebnisse für die erste Sequenz von Anlaufschritten, um zu bestimmen, ob die Genauigkeit der Detektions- und Berechnungsergebnisse ausreichend oder nicht ausreichend ist, durch
    - Berechnen eines Abweichungswerts (P_dev) zwischen wenigstens zwei der berechneten Rotationsleistung-Parameter (P) für die erste Sequenz von Anlaufschritten, oder einer absoluten Differenz (P_dev) zwischen zwei extremen Rotationsleistung-Parametern, maximal (P_max) und minimal (P_min) (STP_5), und
    - Vergleichen des berechneten Abweichungswerts (P_dev) mit einem Schwellen-Abweichungswert (DEV_limit) (STP_5A), und
    - wenn der berechnete Abweichungswert (P_dev) den Schwellen-Abweichungswert (DEV_limit) übersteigt, Bestimmen, dass die Genauigkeit der Detektions- und Berechnungsergebnisse nicht ausreichend ist,
    in dem Fall, dass die Genauigkeit der Detektions- und Berechnungsergebnisse für die erste Sequenz von Anlaufschritten nicht ausreichend ist,
    AA) Durchführen einer zweiten Sequenz von aufeinanderfolgenden zusätzlichen Anlaufschritten und Detektieren des Anlaufstroms (I_inrush), welcher von dem Elektromotor (14) aufgenommen wird, der Rotationsgeschwindigkeit (v) des Elektromotors (14), optional des Ohm'schen Widerstands (R) des Elektromotors (14), und der Zeit (t) (STP_9) während der zusätzlichen Anlaufschritte,
    BB) Berechnen für die zusätzlichen Anlaufschritte des Rotationsleistung-Parameters (P_1), welcher von dem Elektromotor (14) erzeugt wird, abhängig von dem detektierten Anlaufstrom (I_inrush) (STP_10),
    CC) Berechnen für die gesamte zweite Sequenz von zusätzlichen Anlaufschritten eines zusätzlichen durchschnittlichen Werts (P_avg_1) der Rotationsleistung-Parameter (P_1), welche für die individuellen zusätzlichen Anlaufschritte berechnet werden (STP_12),
    DD) Bestimmen der Masse der Wäsche (M) in der Wäschetrommel (5) abhängig von dem durchschnittlichen Wert (P_avg) der Rotationsleistung-Parameter (P) und dem zusätzlichen durchschnittlichen Wert (P_avg_1) der Rotationsleistung-Parameter (P_1) und der vorbestimmten Parameter (P_0, A), welche die Waschmaschine (1) charakterisieren (STP_13).
  5. Waschmaschine (1) nach Anspruch 4, wobei das Modul (26) zum Bestimmen der Wäschemasse eingerichtet ist für:
    - während der zweiten Sequenz von zusätzlichen Anlaufschritten, in dem Detektion-Zeitintervall während der Beschleunigung der Wäschetrommel (5) in Rotation von der anfänglichen Geschwindigkeit (v_init) gleich null bis hin zu der vorbestimmten maximalen Geschwindigkeit (v_max), ebenfalls Detektieren des zusätzlichen Ohm'schen Widerstands (R_1) des Elektromotors (STP_9),
    CC1) Berechnen für die gesamte zweite Sequenz von zusätzlichen Anlaufschritten eines zusätzlichen durchschnittlichen Werts (R_1_avg) der zusätzlichen Ohm'schen Widerstände (R_1) des Elektromotors (14), welche für die zusätzlichen individuellen Anlaufschritte detektiert werden (STP_12),
    DD1) Bestimmen der Masse der Wäsche (M) in der Wäschetrommel (5) ebenfalls abhängig von dem zusätzlichen durchschnittlichen Wert (R_1_avg) der zusätzlichen Ohm'schen Widerstände (R_1) des Elektromotors (14), welche während der zweiten Sequenz von zusätzlichen Anlaufschritten detektiert werden (STP_13).
  6. Waschmaschine (1) nach Anspruch 4 oder 5, wobei das Modul (26) zum Bestimmen der Wäschemasse eingerichtet ist für:
    - Vergleichen (STP_5A) eines Ohm'schen Widerstandsparameters (R), abhängig von dem detektierten Ohm'schen Widerstandswert (R), mit einem vorbestimmen Ohm'schen Schwellen-Widerstandswert (R_0) und in dem Fall, in welchem der Ohm'sche Widerstandsparameter (R) den vorbestimmen Schwellenwert (R_0) übersteigt, Bestimmen, dass die Genauigkeit der Detektions- und Berechnungsergebnisse nicht ausreichend ist.
  7. Waschmaschine (1) nach einem der Ansprüche 4 bis 6, wobei das Modul (26) zum Bestimmen der Wäschemasse eingerichtet ist für:
    - Beibehalten während der ersten Sequenz von Anlaufschritten und/oder während der zweiten Sequenz von zusätzlichen Anlaufschritten einer gleichen Rotationsrichtung des Elektromotors (14) und der Wäschetrommel (5), und
    - nach dem Abschluss der ersten Sequenz von Anlaufschritten und vor dem Start der zweiten Sequenz von zusätzlichen Anlaufschritten Steuern des Elektromotors (14) für ein Durchführen einer Rotation und eines Zwischen-Erregungsschritts für eine vorbestimmte Zwischen-Rotationszeit und mit einer entgegengesetzten Rotationsrichtung bezüglich der Rotationsrichtung des Motors (14) während der ersten Sequenz von Anlaufschritten, und
    optional Stoppen des Elektromotors (14) in einer zusätzlichen anfänglichen Detektionsposition, welche verschieden von der ersten anfänglichen Detektionsposition in der ersten Sequenz von Anlaufschritten ist (STP_7).
  8. Waschmaschine (1) nach einem der Ansprüche 4 bis 7, wobei die Anzahl (n), beispielsweise zehn, von aufeinanderfolgenden Anlaufschritten der ersten Sequenz größer als die Anzahl (m), beispielsweise sechs, von zusätzlichen Anlaufschritten der zweiten Sequenz ist und kleiner als die doppelte Anzahl (m) von zusätzlichen Anlaufschritten der zweiten Sequenz.
  9. Waschmaschine (1) nach einem der Ansprüche 4 bis 7, wobei in der Berechnung der Wäschemasse (M) in der Wäschetrommel (5) (STP_13),
    - der durchschnittliche Wert (P_avg) der Rotationsleistung-Parameter (P), welcher für die erste Sequenz von Anlaufschritten berechnet wird, und der zusätzliche durchschnittliche Wert (P_avg_1) der Rotationsleistung-Parameter (P_1), welcher für die zweite Sequenz von zusätzlichen Anlaufschritten berechnet wird, und/oder
    - der durchschnittliche Wert (R_avg) der Ohm'schen Widerstände (R) des Elektromotors (14), welche während der ersten Sequenz von Anlaufschritten detektiert werden, und der durchschnittliche Wert (R_1_avg) der Ohm'schen Widerstände (R_1) des Elektromotors (14), welche während der zweiten Sequenz von zusätzlichen Anlaufschritten detektiert werden,
    gemäß dem Verhältnis zwischen der Anzahl von Anlaufschritten (n) und der Anzahl von zusätzlichen Anlaufschritten (m) gewichtet werden (STP_13).
  10. Waschmaschine (1) nach einem der vorhergehenden Ansprüche, wobei der Rotationsleistung-Parameter ein Integral ist, numerisch berechnet durch eine Summation, eines Produkts aus:
    - einem Drehmoment-Parameter (T), abhängig von dem detektierten Anlaufstrom (I_inrush) und einem Bewegungsparameter (Mov) des Motors, in einer Domäne, ausgewählt aus der Gruppe, bestehend aus der Zeitdomäne, der kumulativen Winkelposition-Domäne und der Winkelgeschwindigkeit-Domäne.
  11. Waschmaschine (1) nach Anspruch 10, wobei:
    - der Drehmoment-Parameter (T) ausgewählt ist aus der Gruppe, bestehend aus einem Leistungswert, welcher von dem Elektromotor (14) aufgenommen wird, oder einem durchschnittlichen Leistungswert, für jeden numerischen Summationsschritt,
    - der Bewegungsparameter (Mov) ausgewählt ist aus der Gruppe, bestehend aus der Winkelgeschwindigkeit oder Winkelgeschwindigkeit-Zunahme des Motors (14) oder der kumulativen Zeit oder der kumulativen Winkelposition für jeden numerischen Summationsschritt.
  12. Verfahren zum Bestimmen einer Wäschemasse (M) durch eine Waschmaschine (1) oder einen Trockner mit einem Elektromotor (14), welcher betriebsmäßig mit einer Wäschetrommel (5) zum Aufnehmen der Wäsche verbunden ist,
    wobei das Verfahren umfasst:
    A) Durchführen einer ersten Sequenz von aufeinanderfolgenden Anlaufschritten, wobei jeder Anlaufschritt umfasst:
    - Betätigen des Motors (14) der Waschmaschine (1) zum Beschleunigen der Wäschetrommel in Rotation von einer anfänglichen Geschwindigkeit (v_init) gleich null zu einer maximalen vorbestimmten Geschwindigkeit (v_max) mit einer vorbestimmten Beschleunigung (STP_1),
    - auf ein Erreichen der vorbestimmten maximalen Geschwindigkeit (v_max) hin, Verlangsamen des Motors, so dass die Wäschetrommel (5) veranlasst wird, abzubremsen, bis die anfängliche Geschwindigkeit (v_init) erneut erreicht wird, welche gleich null ist,
    - in einem Detektion-Zeitintervall während der Beschleunigung der Wäschetrommel in Rotation von der anfänglichen Geschwindigkeit (v_init) gleich null bis hin zu der vorbestimmten maximalen Geschwindigkeit (v_max), Detektieren des Anlaufstroms (I_inrush), welcher von dem Elektromotor (14) aufgenommen wird, der Rotationsgeschwindigkeit (v) des Elektromotors (14) und der Zeit (t) (STP_2),
    B) Berechnen für jeden individuellen Anlaufschritt eines Rotationsleistung-Parameters (P), welcher durch den Elektromotor (14) erzeugt wird, abhängig von dem Anlaufstrom (I_inrush) (STP_3),
    C) Berechnen für die gesamte erste Sequenz von aufeinanderfolgenden Anlaufschritten eines durchschnittlichen Werts (P_avg) der Rotationsleistung-Parameter (P), welche für die individuellen Anlaufschritte berechnet werden (STP_5),
    D) Bestimmen der Masse (M) der Wäsche in der Wäschetrommel (5) abhängig von dem durchschnittlichen Wert (P_avg) der Rotationsleistung-Parameter (P) und vorbestimmten Parametern (P_0, A), welche die Waschmaschine (1) kennzeichnen (STP_13),
    wobei die Bestimmung der Masse (M) der Wäsche mit der trockenen Wäsche stattfindet und ungeachtet eines spezifischen Wasch- oder Trocknungsprogramms.
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US20230362827A1 (en) * 2022-05-04 2023-11-09 Nordic Semiconductor Asa Power management in transmitters

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