EP3114268B1 - Procédé de détermination d'un poids de chargement d'un système oscillant d'un appareil électroménager destiné à l'entretien d'articles de linge, et appareil électroménager - Google Patents

Procédé de détermination d'un poids de chargement d'un système oscillant d'un appareil électroménager destiné à l'entretien d'articles de linge, et appareil électroménager Download PDF

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Publication number
EP3114268B1
EP3114268B1 EP15709138.0A EP15709138A EP3114268B1 EP 3114268 B1 EP3114268 B1 EP 3114268B1 EP 15709138 A EP15709138 A EP 15709138A EP 3114268 B1 EP3114268 B1 EP 3114268B1
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EP
European Patent Office
Prior art keywords
oscillating system
measured values
shock absorber
slipping
change
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EP15709138.0A
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German (de)
English (en)
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EP3114268A1 (fr
Inventor
Rainer Jurmann
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Priority to PL15709138T priority Critical patent/PL3114268T3/pl
Publication of EP3114268A1 publication Critical patent/EP3114268A1/fr
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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
    • 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
    • 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
    • D06F2103/26—Imbalance; Noise 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis

Definitions

  • the invention relates to a method for determining a loading weight of a vibrating system of a domestic appliance for the care of laundry, in which vibrations of the oscillating system are attenuated by means of at least one shock absorber against a device housing of the household appliance, and wherein by means of a displacement sensor measured values are provided which a displacement indicate the oscillating system with respect to a reference position, and the determination of the loading weight by means of a control device based on the measured values takes place.
  • the invention also relates to a domestic appliance for the care of laundry items, which is designed for carrying out such a method.
  • the laundry care device here includes a detection device which serves to detect an operating parameter, namely in particular a water load of a laundry container.
  • the detection device is coupled to a capacitor whose capacitance is correlated with the operating parameter.
  • a capacitor a film capacitor is used here, which in contrast to a conventional capacitor has a much smaller space requirement and can be arranged due to its geometric flexibility without much effort in an optimal position within the household appliance. This will improve the detection of the Operating parameters ensured.
  • one electrode of the film capacitor are fixed in position to a housing of the household appliance and the other electrode or the counter electrode are fixed in position to the tub. In this way, in addition to determining the water load as a function of the geometric arrangement of the two electrodes, the position or the movement of the tub inside the housing can be determined, whereby a total load of the tub and a static and dynamic imbalance can be determined.
  • the document DE 101 04 682 B4 describes a method for measuring the loading and unbalance of the drum of a washing machine, wherein the capacitance curve of a capacitive sensor during a washing process measured and from the movement of the tub is determined.
  • at least one conductive surface of the sensor is electrically isolated as a capacitive sensor between the tub and the device housing fixed to the housing attached.
  • the interest is directed to the determination of the loading or a loading weight of the washing drum of a washing machine, in particular to the detection of the so-called dry mass of laundry items, which are introduced by the user into the laundry drum.
  • the commonly used method uses the measurement of the movement of the spring-loaded oscillating system with increasing load for determining the mass in the drum.
  • a symmetrical system with a one-dimensional sensor is in this regard, for example, in the document DE 10 2009 028 772 A1 described.
  • Another method which can also be used for asymmetrical systems for determining a loading amount of a laundry treatment appliance is disclosed in the document DE 10 2006 034 190 A1 known.
  • the use of a displacement sensor for determining the load weight of a washing machine is further from the document DE 10 2004 043 838 B3 known.
  • the evaluation of the measured values of the displacement sensor takes place in such a way that the rest position of the oscillating system is detected and stored with the aid of the displacement sensor, and the control is switched into the active mode when the detected values change.
  • the detected rest position of the oscillating system is taken into account.
  • the determination of the rest position thus takes place here in the time in which the control unit is inactive, that is in sleep mode.
  • the displacement sensor is read in at least once again, this value read in under load being subtracted from the value for the rest position detected in sleep mode and the result from this calculation being used as weight for the laundry.
  • An inventive method is used to determine a loading weight of a vibrating system of a household appliance for the care of laundry.
  • at least one shock absorber - this is designed as a spring piston friction damper - vibrations of the oscillating system are damped against a housing of the household appliance.
  • measured values are provided which indicate a displacement of the oscillating system - in particular in the vertical direction of the domestic appliance - with respect to a reference position, ie. a relative position with respect to the reference position.
  • the determination of the loading weight is carried out on the basis of the measured values by means of an electronic control device, which can be designed, for example, as a digital signal processor.
  • a temporal course of the measured values is evaluated by the control device and, based on the chronological progression, slippage of the shock absorber during loading of the oscillating system is detected is, wherein a caused by the slipping change value of the displacement is determined by the control device and compensated in the determination of the loading weight.
  • the invention is based on the finding that the measurement of the load weight in a domestic appliance for the care of laundry items is adversely affected by slippage of a friction lining of the shock absorber. This slippage can occur in particular during the loading process. Another finding is that slippage of the friction lining of the shock absorber generates a typical course of the measured values of the displacement sensor. This typical waveform can detected during the loading process by the control device and interpreted as slippage of the friction lining. If such slipping is detected, an offset value or a change value of the displacement is simultaneously determined and compensated for in the determination of the loading weight.
  • the force impressed into the system by the shock absorber is fundamentally dependent on the lowering of the oscillating system.
  • the weight of the oscillating system including loading is in equilibrium with the spring forces of a spring assembly and the impressed by the at least one shock absorber forces.
  • a change in position is compensated, which results by changing the equilibrium when the at least one shock absorber comes in a non-linear working area and slips.
  • the invention has the advantage that the total loading weight can be determined very precisely, since the main disturbing influence of the loading amount - namely the nonlinear damping force - is compensated. It can also be used with a lower stiction spring piston damper, which has particular advantages in terms of noise reduction. Accordingly, costly, speed-dependent dampers, such as oil hydraulic dampers, do not need to be used.
  • the slippage of the shock absorber is detected when a change in the displacement of the oscillating system which is greater than a predetermined limit value is detected based on the time profile of the measured values within a time interval of a predetermined length.
  • This embodiment is based on the recognition that a large change in the position of the oscillating system within a very short time interval can basically only be caused by the slipping of the shock absorber, but not by the introduction of the laundry items in the laundry drum. If the position of the oscillating system changes abruptly within, for example, two milliseconds, it can be assumed that this change in position is due to the slipping friction lining and not to an additional load. Thus, the slippage of the shock absorber can be detected particularly reliable and the load weight can be precisely determined.
  • this can also be implemented in such a way that, based on the chronological course of the measured values, a rate of change as a change in the shift per Time unit is determined by the controller.
  • the detection of the slipping of the shock absorber can then be made depending on the rate of change. If the rate of change exceeds a predetermined limit, slippage is detected because it is unlikely that a relatively high rate of change can be caused by the introduction of laundry into the laundry drum.
  • a household appliance for the care of items of laundry is understood in particular a washing machine or a washer-dryer.
  • the oscillating system comprises in particular a tub, which is supported on the at least one shock absorber and in particular suspended on a spring assembly.
  • the oscillating system also includes in particular a laundry drum, which is rotatably mounted in the tub.
  • a displacement sensor is understood to mean a sensor which is designed to detect the altitude of the oscillating system.
  • This displacement sensor can be based on any physical principle, for example on optical and / or electrical and / or electromechanical and / or electromagnetic effects.
  • the output signal of the displacement sensor may be an analog or a digital signal.
  • a “slippage of the shock absorber” in the present case is understood to mean a movement or slippage of a friction lining of the damper relative to its friction partner, in particular a cylinder of the damper.
  • a shock absorber in particular a damper can be used, as in the document DE 10 2010 042 173 A1 is described.
  • the displacement of the oscillating system is detected by means of the displacement sensor relative to a reference position of the system.
  • this reference position can be a rest position of the oscillating system that occurs in an unloaded system.
  • This rest position can be detected, for example, after completion of each operating program after unloading the laundry drum.
  • a dry mass of laundry items is determined as the load weight, which is introduced into the laundry drum of the oscillating system. This means that the loading weight of the laundry drum is determined before activating an operating program of the household appliance.
  • the control device determines the abovementioned change value of the offset, which is compensated in the determination of the loading weight. This can in particular be effected in such a way that the change value of the displacement caused by the slippage is subtracted from a current measured value of the displacement sensor (after slipping) and the loading weight is determined as a function of the subtraction result. A distortion of the load weight can thus be prevented.
  • the invention also relates to a domestic appliance for the care of laundry items, comprising a vibrating system including a laundry drum for holding the laundry items, with at least one shock absorber for damping vibrations of the oscillating system against a housing of the household appliance, with at least one displacement sensor for providing measured values indicate a displacement of the oscillating system relative to a reference position, and with a control device for determining a loading weight of the oscillating system on the basis of the measured values.
  • the control device is designed to evaluate a time characteristic of the measured values during a loading process of the oscillating system (16), to detect, based on the time course, slippage of the shock absorber during loading of the oscillating system, to determine a change value of the displacement caused by the slipping to compensate for the determination of the loading weight and then to detect slippage, if, based on the time profile of the measured values, a change in the displacement within a time interval of a predetermined length is detected, which is greater than a predefined limit value.
  • An in Fig. 1 illustrated household appliance 1 is a washing machine in the embodiment.
  • the household appliance 1 comprises a tub 2, in which a laundry drum 3 is rotatably mounted.
  • laundry items 4 which are washed in the household appliance 1 during a care process.
  • the tub 2 is suspended by a spring assembly 5 on a device housing 6 of the household appliance 1.
  • the spring arrangement 5 comprises a first and a second spring 7, 8, wherein the number of springs can be basically arbitrary.
  • the tub 2 is further supported on a damper assembly 9, which in the embodiment comprises a first and a second shock absorber 10, 11.
  • the shock absorbers 10, 11 are friction dampers.
  • the number of shock absorbers 10, 11 used can basically be chosen arbitrarily.
  • the damper assembly 9 may also include three or four such shock absorbers 10, 11.
  • the laundry drum 3 is rotatably mounted in the tub 2 about a horizontally extending axis of rotation 12 and is driven by means of an electric drive motor 13.
  • a rotor of the drive motor 13 may be connected, for example via a belt with the laundry drum 3 in a conventional manner.
  • the tub 2 and the laundry drum 3 form a total of a vibrating system 16 which is suspended via the springs 7, 8 movable in the device housing 6.
  • the shock absorbers 10, 11 are used for damping large amplitudes.
  • a central control device 14 and an electronic engine control unit 15 are further arranged. While the central electronic control device 14 is used to control the care processes of the household appliance 1 and thus represents a higher-level control device, it is the task of the motor control unit 15 to control the electric drive motor 13. For example, while the speed of the drive motor 13 is controlled by means of the engine control unit 15.
  • the central control device 14 can communicate with the engine control unit 15, for example via a communication bus, not shown, or wirelessly.
  • the central control device 14 For controlling the care processes of the household appliance 1, the central control device 14 requires information about the current parameter values of various operating parameters of the household appliance 1, in particular information about the load weight or the dry mass of the laundry items 4.
  • a displacement sensor 17 is used, which is located between the vibrating System 16 on the one hand and a bottom 18 of the device housing 6 is clamped and detects the movement of the tub 2 and the entire oscillating system 16 relative to the device housing 6 in the vertical direction z and thus perpendicular to the axis of rotation 12 or optionally in several dimensions.
  • the Distance sensor 17 detects a current position or displacement of the oscillating system 16 with respect to a reference position, which corresponds in particular to a rest position of the oscillating system 16.
  • the measured values provided by the displacement sensor 17 are transmitted to the control device 14, which then uses these measured values to determine the current load weight.
  • Fig. 2 shows the dependence of a force F introduced by the shock absorbers 10, 11 into the oscillating system 16 from a depression A of the oscillating system 16.
  • the weight of the vibrating system 16, including loading is in equilibrium with the forces of the springs 7, 8 and the force F. impressed by the shock absorbers 10, 11.
  • the linear course of the section 19 shows that the springs of the shock absorbers 10, 11 are continuously tensioned.
  • a static friction FH of the shock absorbers 10, 11 is overcome, and the friction lining slips through, which can be recognized by a further section 21, in which the force F decreases.
  • section 22 the spring of the respective shock absorber 10, 11 stretched again, wherein after reaching the static friction FH, the friction lining again slips. The slippage takes place within a very small time interval T.
  • the interest in the present case is the compensation of the determination of the load weight due to a change in the equilibrium when the shock absorbers 10, 11 come into their non-linear working range and slip.
  • the control device 14 evaluates the time profile of the measured values of the displacement sensor 17. The control device 14 checks whether a very large change in the measured values occurs within a very short time interval. If such a change is detected within a very short time - for example within two milliseconds - it can be assumed with very high probability that this change is due to a slipping shock absorber 10, 11.
  • the measured value changes can basically be assigned to three possible causes:
  • the rate of change v is nearly zero and thus less than a predetermined first limit G1: a low rate of change indicates a change in the load weight and thus a conventional user loading action.
  • the rate of change v is greater than the first threshold G1 and less than a higher second threshold G2.
  • This moderate rate of change v indicates manual manipulation of the vibrating system 16 by the user, which is ignored by the controller 14 herein. This position change of the oscillating system 16 is thus not corrected in the determination of the load weight.
  • the rate of change v is very large and therefore greater than the second limit G2: If this is detected, it is assumed that a slipping shock absorber 10, 11. Slippage of the shock absorber 10, 11, i. A displacement of the position of the friction lining within the shock absorber 10, 11, namely, exists when the measured values of the displacement sensor 17 change very quickly, which can be detected by the control device 14 on the basis of the rate of change v.
  • FIG Fig. 3 A typical dependency of the measured loading weight B on the actual load or the actual weight B 'of the introduced laundry items 4 is shown in FIG Fig. 3 shown. How out Fig. 3 shows that the rate of change v is initially relatively low and almost equal to zero. As indicated at 23, the position or displacement of the oscillating system 16 changes abruptly upon reaching the stiction of the shock absorbers 10, 11. Upon detection of this slippage, the controller 14 determines a change value 24 of the position of the oscillating system 16 caused by slippage This change value 24 represents an offset, which is then compensated in the determination of the loading weight B. The result of the determination of the loading weight B without this compensation is in Fig. 3 denoted by 25.
  • a Loading weight B determined by the control device 14 which is much more realistic.
  • the loading weight B with the compensation according to the invention is in Fig. 3 denoted by 26. How out Fig. 3 In the context of the compensation, the determined change value 24 is deducted from the current measured values of the displacement sensor 17 detected after the detection of slippage.

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

Claims (6)

  1. Procédé de détermination d'un poids de chargement (B) d'un système oscillant (16) d'un appareil ménager (1) destiné à l'entretien de pièces de linge (4), dans lequel des oscillations du système oscillant (16) contre un boîtier d'appareil (6) de l'appareil ménager (1) sont atténuées au moyen d'au moins un amortisseur (10, 11), lequel est réalisé comme amortisseur à friction, et dans lequel des valeurs de mesure sont fournies au moyen d'un capteur de trajectoire (17), lequel est réalisé pour détecter une position en hauteur du système oscillant (16), lesquelles indiquent un décalage en direction ascendante du système oscillant (16) par rapport à une position de référence qui correspond à une position de repos du système oscillant (16), dans lequel la détermination du poids de chargement (B) est réalisée au moyen d'un dispositif de commande (14) à l'aide des valeurs de mesure, et dans lequel une courbe temporelle des valeurs de mesure est évaluée par le dispositif de commande (14) pendant une opération de chargement du système oscillant (16), caractérisé en ce qu'un patinage d'une garniture de friction par rapport à un cylindre de l'amortisseur (10, 11) est détecté lors du chargement du système oscillant (16) à l'aide de la courbe temporelle des valeurs de mesure, le patinage de l'amortisseur se produisant lorsqu'une friction statique FH de l'amortisseur est surmontée, et le patinage étant détecté lorsque, à l'aide de la courbe temporelle des valeurs de mesure, une modification du décalage est détectée pendant un intervalle de temps de longueur prédéfinie, laquelle est supérieure à une valeur limite prédéfinie, et une valeur de modification (24) du décalage, causée par le patinage, étant déterminée par le dispositif de commande (14) et étant compensée lors de la détermination du poids de chargement (B).
  2. Procédé selon la revendication 1, caractérisé en ce qu'une masse sèche de pièces de linge (4) est déterminée comme poids de chargement (B), laquelle est introduite dans un tambour à linge (3) du système oscillant (16).
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'à l'aide de la courbe temporelle des valeurs de mesure, une vitesse de modification (v) est déterminée par le dispositif de commande (14) en tant qu'une modification du décalage (ΔS) par unité de temps (Δt), et en ce que la détection du patinage est réalisée en fonction de la vitesse de modification (v).
  4. Procédé selon la revendication 3, caractérisé en ce que le patinage est détecté lorsque la vitesse de modification (v) dépasse une valeur limite (G2) prédéfinie.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la compensation comprend le fait que la valeur de modification (24) du décalage, causée par le patinage, est déduite d'une valeur de mesure actuelle du capteur de trajectoire (17), et en ce que le poids de chargement (B) est déterminé en fonction du résultat de la soustraction.
  6. Appareil ménager (1) destiné à l'entretien de pièces de linge (4), comprenant un système oscillant (16) y compris un tambour à linge (3) destiné à recevoir les pièces de linge (4), comprenant au moins un amortisseur (10, 11) qui est réalisé comme amortisseur à friction, destiné à atténuer les oscillations du système oscillant (16) contre un boîtier d'appareil (6) de l'appareil ménager (1), comprenant au moins un capteur de trajectoire (17) destiné à fournir des valeurs de mesure qui indiquent un décalage en direction ascendante du système oscillant (16) par rapport à une position de référence qui correspond à une position de repos du système oscillant (16), et comprenant un dispositif de commande (14) destiné à déterminer un poids de chargement (B) du système oscillant (16) à l'aide des valeurs de mesure, le dispositif de commande (14) étant conçu pour évaluer une courbe temporelle des valeurs de mesure pendant une opération de chargement du système oscillant (16), caractérisé en ce que le dispositif de commande (14) est en outre conçu pour détecter, à l'aide de la courbe temporelle des valeurs mesure, un patinage d'une garniture de friction par rapport à un cylindre de l'amortisseur (10, 11) pendant le chargement du système oscillant (16), le patinage de l'amortisseur se produisant lorsqu'une friction statique FH de l'amortisseur est surmontée, et le patinage étant détecté lorsque, à l'aide de la courbe temporelle des valeurs de mesure, une modification du décalage est détectée pendant un intervalle de temps de longueur prédéfinie, laquelle est supérieure à une valeur limite prédéfinie, et pour déterminer une valeur de modification (24) du décalage, causée par le patinage, et pour la compenser lors de la détermination du poids de chargement (B).
EP15709138.0A 2014-03-06 2015-03-03 Procédé de détermination d'un poids de chargement d'un système oscillant d'un appareil électroménager destiné à l'entretien d'articles de linge, et appareil électroménager Active EP3114268B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15709138T PL3114268T3 (pl) 2014-03-06 2015-03-03 Sposób określania ciężaru ładunku systemu oscylacyjnego urządzenia gospodarstwa domowego do pielęgnacji artykułów pralniczych i urządzenie gospodarstwa domowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014204079.5A DE102014204079A1 (de) 2014-03-06 2014-03-06 Verfahren zum Bestimmen eines Beladungsgewichts eines schwingenden Systems eines Haushaltsgeräts zur Pflege von Wäschestücken und Haushaltsgerät
PCT/EP2015/054444 WO2015132270A1 (fr) 2014-03-06 2015-03-03 Procédé de détermination d'un poids de chargement d'un système oscillant d'un appareil électroménager destiné à l'entretien d'articles de linge, et appareil électroménager

Publications (2)

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EP3114268A1 EP3114268A1 (fr) 2017-01-11
EP3114268B1 true EP3114268B1 (fr) 2018-08-08

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EP (1) EP3114268B1 (fr)
CN (1) CN106062269B (fr)
DE (1) DE102014204079A1 (fr)
EA (1) EA033635B1 (fr)
ES (1) ES2690983T3 (fr)
PL (1) PL3114268T3 (fr)
WO (1) WO2015132270A1 (fr)

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CN109778486B (zh) * 2017-11-13 2022-07-08 天津海尔洗涤电器有限公司 一种洗衣机衣物称重方法和洗衣机
CN112899985B (zh) * 2019-11-19 2023-09-19 海信冰箱有限公司 洗衣机
CN111778689A (zh) * 2020-07-15 2020-10-16 珠海格力电器股份有限公司 烘干装置、洗衣机以及烘干方法

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DE102014204079A1 (de) 2015-09-10
EA201691662A1 (ru) 2017-07-31
EP3114268A1 (fr) 2017-01-11
ES2690983T3 (es) 2018-11-23
CN106062269A (zh) 2016-10-26
CN106062269B (zh) 2017-09-26
PL3114268T3 (pl) 2019-02-28
WO2015132270A1 (fr) 2015-09-11
EA033635B1 (ru) 2019-11-12

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