EP2794974B1 - Household appliance for caring for pieces of laundry as well as a method for determining an error status of an oscillating device in a household appliance - Google Patents

Household appliance for caring for pieces of laundry as well as a method for determining an error status of an oscillating device in a household appliance Download PDF

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Publication number
EP2794974B1
EP2794974B1 EP12809745.8A EP12809745A EP2794974B1 EP 2794974 B1 EP2794974 B1 EP 2794974B1 EP 12809745 A EP12809745 A EP 12809745A EP 2794974 B1 EP2794974 B1 EP 2794974B1
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EP
European Patent Office
Prior art keywords
household appliance
acceleration sensor
oscillating device
drum
acceleration
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EP12809745.8A
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German (de)
French (fr)
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EP2794974A1 (en
Inventor
Hasan Gökcer ALBAYRAK
Sebastian Bauer
Ansgar RISCHKE
Rudolf Seidl
Jörg SKRIPPEK
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Priority to PL12809745T priority Critical patent/PL2794974T3/en
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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
    • 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

Definitions

  • the invention relates to a household appliance for the care of laundry items, with a drum for receiving the laundry items, and a housing in which the drum is mounted with a vibrating device. Furthermore, the invention relates to a method for determining a fault condition of a vibration device of a household appliance for the care of laundry, in which a drum for receiving the laundry items is mounted in a housing of the household appliance by means of the oscillating device.
  • the drum In household appliances for the care of items of laundry, such as a washing machine or a tumble dryer, it is known that the drum is mounted for receiving the laundry with a vibrating system or a vibrating device in the housing.
  • This oscillating device usually includes dampers and spring suspensions.
  • the drum rotates about its axis and is formed relative to the housing due to the oscillating mounting means of the vibrating device for performing oscillatory movements.
  • a washing machine with a lye container, a drum arranged in the tub, a housing in which the tub is mounted with a vibrating device, and with an acceleration sensor which is attached to the tub, is made of EP 2 175 061 A1 known. Further disclosed EP 2 175 061 A1 a method by which the presence of a transport fixation of the tub can be determined by means of the acceleration sensor.
  • an oscillating device has a fault condition, for example as a result of a spring break or damper break or due to a worn spring or a worn damper
  • the oscillating movement of the drum is provided with an undesired imbalance during operation, which can lead to damage to the domestic appliance, in particular to further bearings
  • the drum is also stored virtually unsymmetrical in the idle state, which is also undesirable.
  • the mechanical stress influences on other components of the household appliance in such a fault condition of the vibrating device may lead to further malfunction or destruction of other components of the household appliance.
  • An inventive household appliance for the care of laundry comprises a drum for receiving the laundry items, and a housing in which the drum is mounted with a vibrating device.
  • the vibrating device includes means for detecting an error condition of the vibrating device.
  • the device comprises at least one acceleration sensor with which the direction of gravitational acceleration relative to the acceleration sensor can be measured and, depending on the result, an error state of the oscillating device can be detected.
  • the acceleration sensor has at least one measuring axis, and the direction of the gravitational acceleration is measurable relative to the direction of this measuring axis.
  • the precision is high in this regard.
  • the acceleration sensor is arranged on the drum or on the tub. There, it can be positioned mechanically stable and since the drum is coupled to the oscillating device, it is therefore also possible to make a very precise statement about the state of the oscillating device via the position of the drum. Unwanted high loads of the acceleration sensor in a moving oscillating device can be avoided by this positioning. Since the springs and / or dampers of the oscillating device change length during operation due to their configuration, a positioning of the acceleration sensor on such a component is more difficult and may also lead to impairments of the acceleration sensor. By attaching to the drum these possibly occurring difficulties can be avoided.
  • the acceleration sensor has at least two measuring axes, and the direction of the gravitational acceleration can be measured relative to directions of these measuring axes.
  • the determination of an error state can thus be carried out more accurately and even the slightest deviations of the oscillating device from a standard state can be detected.
  • no further components are needed, but it can be achieved by a specific embodiment of this acceleration sensor.
  • the acceleration sensor is arranged on an outer side of the drum.
  • the acceleration sensor in this regard is not polluted. He is also not entrained by possibly hanging laundry or damaged.
  • the acceleration sensor is arranged at the bottom center of the drum.
  • the gravitational acceleration which usually extends vectorially oriented vertically to the ground.
  • a statement about a possible skew of the oscillating device and thus a fault condition can be detected in a very simple yet precise and reliable manner.
  • the household appliance is a washing machine or a tumble dryer.
  • the invention relates to a method for determining a fault condition of a vibrating device of a household appliance for the care of laundry, in which a drum for receiving the laundry items is mounted in a housing of the household appliance by means of the oscillating device.
  • a drum for receiving the laundry items is mounted in a housing of the household appliance by means of the oscillating device.
  • an acceleration sensor of a device for detecting the error state of the oscillating device By means of an acceleration sensor of a device for detecting the error state of the oscillating device, the direction of gravitational acceleration relative to the acceleration sensor is measured, and depending on the result, an error state of the oscillating device is detected.
  • the direction of gravitational acceleration is measured relative to a direction of at least one measuring axis of the acceleration sensor.
  • such a measurement is carried out to a plurality of measuring axes of the acceleration sensor.
  • a reference measurement is carried out, which is stored in the device.
  • the at least one measurement is carried out in the operation of the household appliance in an idle state of the oscillating device.
  • a limit value for a deviation between the direction of the gravitational acceleration of the reference measurement and the direction of at least one measuring axis of the acceleration sensor is determined and an error condition of the oscillating device is detected when the limit value is exceeded.
  • a wide variety of error conditions can be detected and grouped.
  • a complete failure of a component of a vibrating device can be detected quickly, such as a breakage of a damper or a spring.
  • a damper or a spring can be detected, which is still not broken, but in comparison to another damper or to another spring is already more worn and the full functionality is no longer given.
  • Fig. 1 is shown in a simplified representation of a household appliance 1 for the care of laundry, which may be for example a washing machine or a tumble dryer.
  • the household appliance 1 comprises a housing 2.
  • a drum 3 is arranged, which is designed for receiving laundry items and which is rotatable about an axis A which is oriented perpendicular to the plane of the figure.
  • the domestic appliance 1 is a washing machine, it also includes, in particular, a tub 4 which surrounds the drum 3 and in which the drum 3 is rotatably mounted.
  • the household appliance 1 further comprises a vibrating device 5, which has in the upper region by way of example springs 6 and 7, and in the lower region comprises dampers 8 and 9.
  • the springs 6 and 7, which are only mentioned by way of example in number and position, are connected in an upper region of the housing 2 with this.
  • dampers 8 and 9 which are also shown by way of example in number and position, are connected to the housing 2 at a lower area.
  • the oscillating device 5 For driving the drum 3, the oscillating device 5 comprises a drive motor, not shown, which may be, for example, a permanent magnet synchronous motor.
  • the rotor of this motor is connected to the drum 3 via a belt.
  • the oscillating device 5 comprises a device 10 for detecting an error state of the oscillating device 5.
  • this device 10 comprises at least one acceleration sensor 11.
  • the acceleration sensor 11 comprises at least one such measuring axis, preferably at least two measuring axes oriented in different directions.
  • the acceleration sensor 11 may be arranged on an outer side 15 of the drum 3 and in particular at the bottom there. However, it can also be arranged on the tub 4 at a corresponding position.
  • Fig. 1 an error-free state of the oscillating device 5 is shown. This is because the direction 12 coincides with the direction 13.
  • a reference measurement is first of all carried out in which the oscillating device 5 is centered and centered and without imbalance, and thus also the drum 3 and / or the tub 4 are positioned centered. This reference measurement and thus also the direction 13 of the measuring axis 14 of the acceleration sensor 11 are then stored accordingly.
  • the household appliance 1 and in particular the oscillating device 5 comprises a control and evaluation unit, which is not shown.
  • one or more actual measurements are then performed and checked whether the error-free state of the vibrating device 5 is given or an error condition has occurred. For this purpose, a comparison of a measured actual direction of at least one measuring axis of Acceleration sensor 11 performed with the direction of gravity acceleration 12. If a deviation occurs here, or if a deviation occurs which is greater than a limit value, an error state is detected.
  • An error condition may be a break of a damper 8 and / or 9 and / or a spring 6 and / or 7.
  • a fault condition may also be such that a damper 8 or 9 or a spring 6 or 7 is not yet broken but worn and has functionality in comparison to the other dampers 8 and / or 9 and / or the springs 6 and / or 7 is deteriorating.
  • Fig. 2 For this purpose, a state is shown in which an error of the oscillating device 5 is present. It can be seen that the drum 3 is no longer centrally positioned centrally when the oscillating device 5 is at rest, but a certain inclination occurs. As a result, the direction 13 of the measuring axis 14 is no longer vertically downwards and no longer coinciding with the direction 12 of the gravitational acceleration. In Fig. 2 Thus, a deviation between the directions 13 and 12 has occurred, which characterizes a fault condition.

Description

Die Erfindung betrifft ein Haushaltsgerät zur Pflege von Wäschestücken, mit einer Trommel zur Aufnahme der Wäschestücke, und einem Gehäuse, in dem die Trommel mit einer Schwingvorrichtung gelagert ist. Des Weiteren betrifft die Erfindung ein Verfahren zum Bestimmen eines Fehlerzustands einer Schwingvorrichtung eines Haushaltsgerät zur Pflege von Wäschestücken, bei welchem eine Trommel zur Aufnahme der Wäschestücke in einem Gehäuse des Haushaltsgeräts mittels der Schwingvorrichtung gelagert ist.The invention relates to a household appliance for the care of laundry items, with a drum for receiving the laundry items, and a housing in which the drum is mounted with a vibrating device. Furthermore, the invention relates to a method for determining a fault condition of a vibration device of a household appliance for the care of laundry, in which a drum for receiving the laundry items is mounted in a housing of the household appliance by means of the oscillating device.

Bei Haushaltsgeräten zur Pflege von Wäschestücken, wie beispielsweise einer Waschmaschine oder einem Wäschetrockner, ist es bekannt, dass die Trommel zur Aufnahme der Wäschestücke mit einem Schwingsystem bzw. einer Schwingvorrichtung in dem Gehäuse gelagert ist. Diese Schwingvorrichtung umfasst üblicherweise Dämpfer und Federaufhängungen. Im Betrieb des Haushaltsgeräts dreht sich die Trommel um ihre Achse und ist aufgrund der schwingenden Lagerung mittels der Schwingvorrichtung zur Durchführung von Schwingbewegungen relativ zum Gehäuse ausgebildet.In household appliances for the care of items of laundry, such as a washing machine or a tumble dryer, it is known that the drum is mounted for receiving the laundry with a vibrating system or a vibrating device in the housing. This oscillating device usually includes dampers and spring suspensions. During operation of the household appliance, the drum rotates about its axis and is formed relative to the housing due to the oscillating mounting means of the vibrating device for performing oscillatory movements.

Eine Waschmaschine mit einem Laugenbehälter, einer im dem Laugenbehälter angeordneten Trommel, einem Gehäuse, in dem der Laugenbehälter mit einer Schwingvorrichtung gelagert ist, und mit einem Beschleunigungssensor, welcher an dem Laugenbehälter befestigt ist, ist aus EP 2 175 061 A1 bekannt. Ferner offenbart EP 2 175 061 A1 ein Verfahren, mit welchem mittels des Beschleunigungssensors das Vorhandensein einer Transportfixierung des Laugenbehälters festgestellt werden kann.A washing machine with a lye container, a drum arranged in the tub, a housing in which the tub is mounted with a vibrating device, and with an acceleration sensor which is attached to the tub, is made of EP 2 175 061 A1 known. Further disclosed EP 2 175 061 A1 a method by which the presence of a transport fixation of the tub can be determined by means of the acceleration sensor.

Weist eine derartige Schwingvorrichtung einen Fehlerzustand auf, beispielsweise aufgrund eines Federbruchs oder Dämpferbruchs oder aufgrund einer verschlissenen Feder oder eines verschlissenen Dämpfers, so ist die Schwingbewegung der Trommel im Betrieb mit einer unerwünschten Unwucht versehen, was zu Beschädigungen des Haushaltsgeräts, insbesondere von weiteren Lagerungen führen kann. In einem derartigen Fehlerzustand der Schwingvorrichtung ist die Trommel auch quasi unsymmetrisch im Ruhezustand gelagert, was ebenfalls unerwünscht ist. Die mechanischen Belastungseinflüsse auf weitere Komponenten des Haushaltsgeräts in einem derartigen Fehlerzustand der Schwingvorrichtung kann zu weiteren Fehlfunktionen oder zur Zerstörung von anderen Komponenten des Haushaltsgeräts führen.If such an oscillating device has a fault condition, for example as a result of a spring break or damper break or due to a worn spring or a worn damper, the oscillating movement of the drum is provided with an undesired imbalance during operation, which can lead to damage to the domestic appliance, in particular to further bearings , In such an error state of the oscillating device, the drum is also stored virtually unsymmetrical in the idle state, which is also undesirable. The mechanical stress influences on other components of the household appliance in such a fault condition of the vibrating device may lead to further malfunction or destruction of other components of the household appliance.

Es ist daher wesentlich, einen Fehlerzustand einer Schwingvorrichtung genau und möglichst frühzeitig erkennen zu können, um die oben genannten Probleme vermeiden zu können.It is therefore essential to be able to detect a fault condition of a vibrating device accurately and as early as possible in order to avoid the above-mentioned problems.

Es ist Aufgabe der vorliegenden Erfindung, ein Haushaltsgerät zur Pflege von Wäschestücken sowie ein Verfahren zum Bestimmen eines Fehlerzustands einer Schwingvorrichtung eines derartigen Haushaltsgeräts zu schaffen, bei welchem bzw. mit welchem eine derartige Fehlerzustandserkennung sehr genau und schnell erfolgen kann.It is an object of the present invention to provide a household appliance for the care of laundry items and a method for determining a fault condition of a vibrating device of such a household appliance, in which or with which such error condition detection can be done very accurately and quickly.

Diese Aufgabe wird durch ein Haushaltsgerät zur Pflege von Wäschestücken als auch ein Verfahren gemäß den unabhängigen Ansprüchen 1 und 5 gelöst.This object is achieved by a household appliance for the care of laundry as well as a method according to the independent claims 1 and 5.

Ein erfindungsgemäßes Haushaltsgerät zur Pflege von Wäschestücken umfasst eine Trommel zur Aufnahme der Wäschestücke, und ein Gehäuse, in dem die Trommel mit einer Schwingvorrichtung gelagert ist. Die Schwingvorrichtung umfasst eine Einrichtung zur Erkennung eines Fehlerzustands der Schwingvorrichtung. Die Einrichtung umfasst dazu zumindest einen Beschleunigungssensor, mit welchem die Richtung der Erdbeschleunigung relativ zum Beschleunigungssensor messbar ist und abhängig von dem Ergebnis ein Fehlerzustand der Schwingvorrichtung erkennbar ist. Durch eine derartige Ausgestaltung kann eine sehr präzise und schnelle Detektion von Fehlerzuständen der Schwingvorrichtung erreicht werden. Bereits geringste Abweichungen von einer fehlerfreien Lagerung der Schwingvorrichtung können damit erfasst werden. Darüber hinaus ist die Ausgestaltung im Hinblick auf Bauteileaufwand und Platzbedarf äußerst minimiert, sodass auch hier entsprechende Vorteile gegeben sind.An inventive household appliance for the care of laundry comprises a drum for receiving the laundry items, and a housing in which the drum is mounted with a vibrating device. The vibrating device includes means for detecting an error condition of the vibrating device. For this purpose, the device comprises at least one acceleration sensor with which the direction of gravitational acceleration relative to the acceleration sensor can be measured and, depending on the result, an error state of the oscillating device can be detected. By such a configuration, a very precise and rapid detection of fault conditions of the vibrating device can be achieved. Even the slightest deviations from a fault-free mounting of the oscillating device can thus be detected. In addition, the design is extremely minimized in terms of component count and space requirements, so that there are corresponding advantages here.

Es ist vorgesehen, dass der Beschleunigungssensor zumindest eine Messachse aufweist, und die Richtung der Erdbeschleunigung relativ zur Richtung dieser Messachse messbar ist. Die Präzision ist diesbezüglich hoch.It is provided that the acceleration sensor has at least one measuring axis, and the direction of the gravitational acceleration is measurable relative to the direction of this measuring axis. The precision is high in this regard.

Ferner ist es vorgesehen, dass der Beschleunigungssensor an der Trommel bzw. an dem Laugenbehälter angeordnet ist. Dort kann er mechanisch stabil positioniert werden und da die Trommel mit der Schwingvorrichtung gekoppelt ist, kann somit über die Lage der Trommel auch eine sehr präzise Aussage über den Zustand der Schwingvorrichtung getroffen werden. Unerwünscht hohe Belastungen des Beschleunigungssensors bei einer sich bewegenden Schwingvorrichtung können durch diese Positionierung vermieden werden. Da sich die Federn und/oder Dämpfer der Schwingvorrichtung im Betrieb aufgrund ihrer Ausgestaltung längenverändern, ist eine Positionierung des Beschleunigungssensors an einem derartigen Bauteil schwieriger und kann auch zu Beeinträchtigungen des Beschleunigungssensors führen. Durch die Befestigung an der Trommel können diese gegebenenfalls auftretenden Schwierigkeiten vermieden werden.Furthermore, it is provided that the acceleration sensor is arranged on the drum or on the tub. There, it can be positioned mechanically stable and since the drum is coupled to the oscillating device, it is therefore also possible to make a very precise statement about the state of the oscillating device via the position of the drum. Unwanted high loads of the acceleration sensor in a moving oscillating device can be avoided by this positioning. Since the springs and / or dampers of the oscillating device change length during operation due to their configuration, a positioning of the acceleration sensor on such a component is more difficult and may also lead to impairments of the acceleration sensor. By attaching to the drum these possibly occurring difficulties can be avoided.

Insbesondere ist vorgesehen, dass der Beschleunigungssensor zumindest zwei Messachsen aufweist, und die Richtung der Erdbeschleunigung relativ zu Richtungen dieser Messachsen messbar ist. Die Bestimmung eines Fehlerzustands kann somit noch genauer erfolgen und bereits geringste Abweichungen der Schwingvorrichtung von einem Normzustand können erfasst werden. Dazu werden keine weiteren Bauteile benötigt, sondern es kann durch eine spezifische Ausgestaltung dieses Beschleunigungssensors erreicht werden.In particular, it is provided that the acceleration sensor has at least two measuring axes, and the direction of the gravitational acceleration can be measured relative to directions of these measuring axes. The determination of an error state can thus be carried out more accurately and even the slightest deviations of the oscillating device from a standard state can be detected. For this purpose, no further components are needed, but it can be achieved by a specific embodiment of this acceleration sensor.

Vorzugsweise ist vorgesehen, dass der Beschleunigungssensor an einer Außenseite der Trommel angeordnet ist. Dadurch wird einerseits der Innenraum der Trommel, in dem die Wäschestücke angeordnet sind, nicht beeinträchtigt und andererseits der Beschleunigungssensor diesbezüglich nicht verschmutzt. Auch wird er nicht durch gegebenenfalls hängen bleibende Wäschestücke mitgerissen oder beschädigt.It is preferably provided that the acceleration sensor is arranged on an outer side of the drum. As a result, on the one hand the interior of the drum, in which the laundry items are arranged, not affected and on the other hand, the acceleration sensor in this regard is not polluted. He is also not entrained by possibly hanging laundry or damaged.

Vorzugsweise ist vorgesehen, dass der Beschleunigungssensor unten mittig an der Trommel angeordnet ist. Dadurch können sehr genaue Aussagen im Hinblick auf die Erdbeschleunigung, die sich üblicherweise vertikal zum Boden vektoriell orientiert erstreckt, getroffen werden. Dadurch kann in sehr einfacher und dennoch präziser und zuverlässiger Weise eine Aussage über eine mögliche Schieflage der Schwingvorrichtung und somit einen Fehlerzustand erkannt werden.It is preferably provided that the acceleration sensor is arranged at the bottom center of the drum. As a result, very accurate statements can be made with regard to the gravitational acceleration, which usually extends vectorially oriented vertically to the ground. As a result, a statement about a possible skew of the oscillating device and thus a fault condition can be detected in a very simple yet precise and reliable manner.

Insbesondere ist das Haushaltsgerät eine Waschmaschine oder ein Wäschetrockner.In particular, the household appliance is a washing machine or a tumble dryer.

Des Weiteren betrifft die Erfindung ein Verfahren zum Bestimmen eines Fehlerzustands einer Schwingvorrichtung eines Haushaltsgeräts zur Pflege von Wäschestücken, bei welchem eine Trommel zur Aufnahme der Wäschestücke in einem Gehäuse des Haushaltsgeräts mittels der Schwingvorrichtung gelagert ist. Mittels eines Beschleunigungssensors einer Einrichtung zur Erkennung des Fehlerzustands der Schwingvorrichtung wird die Richtung der Erdbeschleunigung relativ zum Beschleunigungssensor gemessen, und abhängig von dem Ergebnis wird ein Fehlerzustand der Schwingvorrichtung erkannt. Die oben genannten Vorteile gelten hier analog.Furthermore, the invention relates to a method for determining a fault condition of a vibrating device of a household appliance for the care of laundry, in which a drum for receiving the laundry items is mounted in a housing of the household appliance by means of the oscillating device. By means of an acceleration sensor of a device for detecting the error state of the oscillating device, the direction of gravitational acceleration relative to the acceleration sensor is measured, and depending on the result, an error state of the oscillating device is detected. The above advantages apply analogously.

Es wird vorgesehen, dass die Richtung der Erdbeschleunigung relativ zu einer Richtung zumindest einer Messachse des Beschleunigungssensors gemessen wird. Insbesondere erfolgt eine derartige Messung zu mehreren Messachsen des Beschleunigungssensors.It is provided that the direction of gravitational acceleration is measured relative to a direction of at least one measuring axis of the acceleration sensor. In particular, such a measurement is carried out to a plurality of measuring axes of the acceleration sensor.

Vorzugsweise wird in einem fehlerfreien Zustand der Schwingvorrichtung eine Referenzmessung durchgeführt, welche in der Einrichtung abgespeichert wird. Durch eine derartige Vorgehensweise, bei der dann insbesondere im weiteren Betrieb des Haushaltsgeräts zumindest eine Ist-Messung durchgeführt wird, welche mit der Referenzmessung verglichen wird, wobei abhängig von dem Vergleich ein Fehlerzustand erkannt wird, kann das Mess- und Auswerteverfahren äußerst einfach gestaltet werden. Dadurch können sehr schnelle und präzise Ergebnisse ohne großen Rechenaufwand erzielt werden.Preferably, in a fault-free state of the oscillating device, a reference measurement is carried out, which is stored in the device. By such an approach, in which then at least one actual measurement is performed in particular in the further operation of the household appliance, which is compared with the reference measurement, wherein an error condition is detected depending on the comparison, the measurement and evaluation can be made extremely simple. As a result, very fast and precise results can be achieved without great computational effort.

Vorzugsweise wird vorgesehen, dass die zumindest eine Messung im Betrieb des Haushaltsgeräts in einem Ruhezustand der Schwingvorrichtung durchgeführt wird. Dadurch können Verfälschungen des Messergebnisses aufgrund komplexer Schwingbewegungen der gesamten Schwingvorrichtung vermieden werden und mögliche Fehldetektionen vermieden werden.It is preferably provided that the at least one measurement is carried out in the operation of the household appliance in an idle state of the oscillating device. As a result, distortions of the measurement result due to complex oscillatory movements of the entire oscillating device can be avoided and possible misdetections can be avoided.

Vorzugsweise wird vorgesehen, dass ein Grenzwert für eine Abweichung zwischen der Richtung der Erdbeschleunigung der Referenzmessung und der Richtung zumindest einer Messachse des Beschleunigungssensors bestimmt wird und bei einem Überschreiten des Grenzwerts ein Fehlerzustand der Schwingvorrichtung erkannt wird. Durch eine derartige Ausgestaltung können insbesondere unterschiedlichste Fehlerzustände erfasst und gruppiert werden. In diesem Zusammenhang kann einerseits ein kompletter Ausfall eines Bauteils einer Schwingvorrichtung schnell erfasst werden, wie beispielsweise ein Bruch eines Dämpfers oder einer Feder. Andererseits kann mit einer derartigen Vorgehensweise auch ein Dämpfer oder eine Feder erkannt werden, der bzw. die noch nicht gebrochen ist, jedoch im Vergleich zu einem anderen Dämpfer oder zu einer anderen Feder bereits stärker abgenutzt ist und die volle Funktionsfähigkeit nicht mehr gegeben ist.It is preferably provided that a limit value for a deviation between the direction of the gravitational acceleration of the reference measurement and the direction of at least one measuring axis of the acceleration sensor is determined and an error condition of the oscillating device is detected when the limit value is exceeded. By such Design, in particular, a wide variety of error conditions can be detected and grouped. In this context, on the one hand a complete failure of a component of a vibrating device can be detected quickly, such as a breakage of a damper or a spring. On the other hand, with such an approach, a damper or a spring can be detected, which is still not broken, but in comparison to another damper or to another spring is already more worn and the full functionality is no longer given.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand schematischer Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine schematische Frontansicht auf ein Ausführungsbeispiel eines erfindungsgemäßen Haushaltsgeräts in einem fehlerfreien Zustand; und
Fig. 2
eine entsprechende Darstellung gemäß Fig. 1, bei dem ein Fehlerzustand der Schwingvorrichtung des Haushaltsgeräts vorliegt.
In den Figuren werden gleiche oder funktionsgleiche Elemente mit den gleichen Bezugszeichen versehen.An embodiment of the invention will be explained in more detail with reference to schematic drawings. Show it:
Fig. 1
a schematic front view of an embodiment of a household appliance according to the invention in a healthy state; and
Fig. 2
a corresponding representation according to Fig. 1 in which a fault condition of the oscillating device of the household appliance is present.
In the figures, identical or functionally identical elements are provided with the same reference numerals.

In Fig. 1 ist in einer vereinfachten Darstellung ein Haushaltsgerät 1 zur Pflege von Wäschestücken gezeigt, welches beispielsweise eine Waschmaschine oder ein Wäschetrockner sein kann. Das Haushaltsgerät 1 umfasst ein Gehäuse 2. In dem Gehäuse 2 ist eine Trommel 3 angeordnet, welche zur Aufnahme von Wäschestücken ausgebildet ist und welche um eine Achse A, die senkrecht zur Figurenebene orientiert ist, rotierbar ist.In Fig. 1 is shown in a simplified representation of a household appliance 1 for the care of laundry, which may be for example a washing machine or a tumble dryer. The household appliance 1 comprises a housing 2. In the housing 2, a drum 3 is arranged, which is designed for receiving laundry items and which is rotatable about an axis A which is oriented perpendicular to the plane of the figure.

Ist das Haushaltsgerät 1 eine Waschmaschine, so umfasst sie insbesondere auch noch einen Laugenbehälter 4, der die Trommel 3 umgibt und in welchem die Trommel 3 drehbar gelagert ist.If the domestic appliance 1 is a washing machine, it also includes, in particular, a tub 4 which surrounds the drum 3 and in which the drum 3 is rotatably mounted.

Das Haushaltsgerät 1 umfasst darüber hinaus eine Schwingvorrichtung 5, die im oberen Bereich beispielhaft Federn 6 und 7 aufweist, und im unteren Bereich Dämpfer 8 und 9 umfasst. Die Federn 6 und 7, die in Anzahl und Position lediglich beispielhaft genannt sind, sind in einem oberen Bereich des Gehäuses 2 mit diesem verbunden.The household appliance 1 further comprises a vibrating device 5, which has in the upper region by way of example springs 6 and 7, and in the lower region comprises dampers 8 and 9. The springs 6 and 7, which are only mentioned by way of example in number and position, are connected in an upper region of the housing 2 with this.

Entsprechend sind die ebenfalls in Anzahl und Position beispielhaft gezeigten Dämpfer 8 und 9 an einem unteren Bereich mit dem Gehäuse 2 verbunden.Correspondingly, the dampers 8 and 9, which are also shown by way of example in number and position, are connected to the housing 2 at a lower area.

Zum Antreiben der Trommel 3 umfasst die Schwingvorrichtung 5 einen nicht gezeigten Antriebsmotor, der beispielsweise ein permanentmagneterregter Synchronmotor sein kann. Der Rotor dieses Motors ist über einen Riemen mit der Trommel 3 verbunden.For driving the drum 3, the oscillating device 5 comprises a drive motor, not shown, which may be, for example, a permanent magnet synchronous motor. The rotor of this motor is connected to the drum 3 via a belt.

Die Schwingvorrichtung 5 umfasst eine Einrichtung 10 zur Erkennung eines Fehlerzustands der Schwingvorrichtung 5. Diese Einrichtung 10 umfasst im Ausführungsbeispiel zumindest einen Beschleunigungssensor 11.The oscillating device 5 comprises a device 10 for detecting an error state of the oscillating device 5. In the exemplary embodiment, this device 10 comprises at least one acceleration sensor 11.

Mit diesem ist die Richtung der Erdbeschleunigung relativ zu diesem Beschleunigungssensor 11 messbar, wobei hierzu insbesondere ein Vergleich der Richtungen 12 der Erdbeschleunigung und einer Richtung 13 einer Messachse 14 des Beschleunigungssensors 11 durchgeführt wird. Der Beschleunigungssensor 11 umfasst zumindest eine derartige Messachse, vorzugsweise zumindest zwei in unterschiedliche Richtungen orientierte Messachsen.With this, the direction of gravitational acceleration relative to this acceleration sensor 11 can be measured, in which case in particular a comparison of the directions of gravity acceleration 12 and a direction 13 of a measuring axis 14 of the acceleration sensor 11 is performed. The acceleration sensor 11 comprises at least one such measuring axis, preferably at least two measuring axes oriented in different directions.

Der Beschleunigungssensor 11 kann an einer Außenseite 15 der Trommel 3 und insbesondere unten mittig dort angeordnet sein. Er kann jedoch auch an dem Laugenbehälter 4 an entsprechender Position angeordnet sein.The acceleration sensor 11 may be arranged on an outer side 15 of the drum 3 and in particular at the bottom there. However, it can also be arranged on the tub 4 at a corresponding position.

In Fig. 1 ist ein fehlerfreier Zustand der Schwingvorrichtung 5 gezeigt. Dies ist dadurch gegeben, dass die Richtung 12 mit der Richtung 13 zusammenfällt.In Fig. 1 an error-free state of the oscillating device 5 is shown. This is because the direction 12 coincides with the direction 13.

Um einen entsprechenden Fehlerzustand erkennen zu können, wird zunächst eine Referenzmessung durchgeführt, bei der die Schwingvorrichtung 5 zentriert und mittig und ohne Schieflage steht und somit auch die Trommel 3 und/oder der Laugenbehälter 4 zentriert positioniert sind. Diese Referenzmessung und somit auch die Richtung 13 der Messachse 14 des Beschleunigungssensors 11 werden dann entsprechend gespeichert. Dazu umfasst das Haushaltsgerät 1 und insbesondere die Schwingvorrichtung 5 eine Steuer- und Auswerteeinheit, die nicht gezeigt ist.In order to be able to recognize a corresponding error state, a reference measurement is first of all carried out in which the oscillating device 5 is centered and centered and without imbalance, and thus also the drum 3 and / or the tub 4 are positioned centered. This reference measurement and thus also the direction 13 of the measuring axis 14 of the acceleration sensor 11 are then stored accordingly. For this purpose, the household appliance 1 and in particular the oscillating device 5 comprises a control and evaluation unit, which is not shown.

Im weiteren Betrieb des Haushaltsgeräts 1 werden dann eine oder mehrere Ist-Messungen durchgeführt und überprüft, ob der fehlerfreie Zustand der Schwingvorrichtung 5 gegeben ist oder ein Fehlerzustand aufgetreten ist. Dazu wird ein Vergleich einer gemessenen Ist-Richtung zumindest einer Messachse des Beschleunigungssensors 11 mit der Richtung 12 der Erdbeschleunigung durchgeführt. Tritt hier eine Abweichung auf, oder tritt eine Abweichung auf, die größer als ein Grenzwert ist, so wird ein Fehlerzustand erkannt. Ein Fehlerzustand kann ein Bruch eines Dämpfers 8 und/oder 9 und/oder einer Feder 6 und/oder 7 sein. Ein Fehlerzustand kann jedoch auch ein derartiger sein, bei dem ein Dämpfer 8 oder 9 oder eine Feder 6 oder 7 noch nicht gebrochen sind aber abgenutzt sind und die Funktionalität im Vergleich zu den anderen Dämpfern 8 und/oder 9 und/oder den Federn 6 und/oder 7 verschlechtert ist.In the further operation of the household appliance 1, one or more actual measurements are then performed and checked whether the error-free state of the vibrating device 5 is given or an error condition has occurred. For this purpose, a comparison of a measured actual direction of at least one measuring axis of Acceleration sensor 11 performed with the direction of gravity acceleration 12. If a deviation occurs here, or if a deviation occurs which is greater than a limit value, an error state is detected. An error condition may be a break of a damper 8 and / or 9 and / or a spring 6 and / or 7. However, a fault condition may also be such that a damper 8 or 9 or a spring 6 or 7 is not yet broken but worn and has functionality in comparison to the other dampers 8 and / or 9 and / or the springs 6 and / or 7 is deteriorating.

In Fig. 2 ist dazu ein Zustand gezeigt, bei dem ein Fehler der Schwingvorrichtung 5 vorliegt. Es ist dabei zu erkennen, dass die Trommel 3 nicht mehr zentral mittig positioniert ist, wenn sich die Schwingvorrichtung 5 im Ruhezustand befindet, sondern eine gewisse Neigung auftritt. Dadurch ist die Richtung 13 der Messachse 14 nicht mehr vertikal nach unten und nicht mehr deckungsgleich mit der Richtung 12 der Erdbeschleunigung. In Fig. 2 ist somit eine Abweichung zwischen den Richtungen 13 und 12 aufgetreten, die einen Fehlerzustand charakterisiert.In Fig. 2 For this purpose, a state is shown in which an error of the oscillating device 5 is present. It can be seen that the drum 3 is no longer centrally positioned centrally when the oscillating device 5 is at rest, but a certain inclination occurs. As a result, the direction 13 of the measuring axis 14 is no longer vertically downwards and no longer coinciding with the direction 12 of the gravitational acceleration. In Fig. 2 Thus, a deviation between the directions 13 and 12 has occurred, which characterizes a fault condition.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Haushaltsgeräthousehold appliance
22
Gehäusecasing
33
Trommeldrum
44
Laugenbehältertub
55
Schwingvorrichtungoscillating device
66
Federfeather
77
Federfeather
88th
Dämpferdamper
99
Dämpferdamper
1010
EinrichtungFacility
1111
Beschleunigungssensoraccelerometer
1212
Richtungdirection
1313
Richtungdirection
1414
Messachsemeasuring axis
1515
Außenseiteoutside

Claims (9)

  1. Household appliance (1) for caring for pieces of laundry, having a drum (3) for receiving pieces of laundry, a housing (2) in which the drum (3) is mounted with an oscillating device (5), and at least one acceleration sensor (11) which is arranged on the drum (3) or an outer tub (4) and which comprises at least one measuring axis (14), characterised in that the oscillating device (5) comprises a facility (10) for identifying an error status of the oscillating device (5), wherein the facility (10) includes the at least one acceleration sensor (11), with which the direction (12) of the acceleration of gravity, which extends vectorially oriented vertically with respect to the base, can be measured relative to the direction (13) of the measuring axis (14) of the acceleration sensor (11) and an error status of the oscillating device (5) can be identified as a function of a comparison of the direction (12) of the acceleration of gravity and the direction (13) of the measuring axis (14) of the acceleration sensor (11).
  2. Household appliance (1) according to claim 1, characterised in that the acceleration sensor (11) comprises at least two measuring axes and the direction (12) of the acceleration of gravity can be measured relative to directions of these measuring axes.
  3. Household appliance (1) according to claim 1 or 2, characterised in that the acceleration sensor (11) is arranged on an exterior (15) of the drum (3) or an exterior of the outer tub (4).
  4. Household appliance (1) according to one of the preceding claims, characterised in that the acceleration sensor (11) is arranged centrally at the bottom on the drum (3) or the outer tub (4).
  5. Method for determining an error status of an oscillating device (5) of a household appliance (1) for caring for pieces of laundry, in which a drum (3) for receiving pieces of laundry in a housing (2) of the household appliance (1) is mounted by means of the oscillating device (5) and at least one acceleration sensor (11), which is arranged on the drum (3) or an outer tub (4), and comprises at least one measuring axis (14), characterised in that the direction (12) of the acceleration of gravity, which extends vectorially oriented vertically with respect to the base, is measured relative to the direction (13) of the measuring axis (14) of the acceleration sensor (11) by means of the acceleration sensor (11) of a facility (10) for identifying the error status, a comparison of the direction (12) of the acceleration of gravity and the direction (13) of the measuring axis (14) of the acceleration sensor (11) is implemented and an error status of the oscillating device (5) is identified as a function of the comparison.
  6. Method according to claim 5, characterised in that a reference measurement which is stored in the facility (10) is implemented in an error-free status of the oscillating device (5).
  7. Method according to claim 6, characterised in that at least one actual measurement which is compared with the reference measurement is implemented during operation of the household appliance (1) and an error status is identified as a function of the comparison.
  8. Method according to claim 7, characterised in that the at least one actual measurement is implemented during operation of the household appliance (1) while the oscillating device (5) is idling.
  9. Method according to claim 7 or 8, characterised in that a limit value for a deviation between the direction (12) of the acceleration of gravity of the reference measurement and the direction (13) of at least one measuring axis (14) of the acceleration sensor (11) is determined and an error status of the oscillating device (5) is identified if the limit value is exceeded.
EP12809745.8A 2011-12-22 2012-12-17 Household appliance for caring for pieces of laundry as well as a method for determining an error status of an oscillating device in a household appliance Active EP2794974B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12809745T PL2794974T3 (en) 2011-12-22 2012-12-17 Household appliance for caring for pieces of laundry as well as a method for determining an error status of an oscillating device in a household appliance

Applications Claiming Priority (2)

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DE102011089624A DE102011089624A1 (en) 2011-12-22 2011-12-22 Household appliance for the care of laundry items and method for determining a fault condition of a vibrating device of a household appliance
PCT/EP2012/075786 WO2013092486A1 (en) 2011-12-22 2012-12-17 Household appliance for caring for pieces of laundry as well as a method for determining an error status of an oscillating device in a household appliance

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EP2794974A1 EP2794974A1 (en) 2014-10-29
EP2794974B1 true EP2794974B1 (en) 2015-09-16

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EP (1) EP2794974B1 (en)
CN (1) CN104011279B (en)
DE (1) DE102011089624A1 (en)
PL (1) PL2794974T3 (en)
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WO (1) WO2013092486A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012112199B4 (en) * 2012-12-13 2016-01-14 Miele & Cie. Kg Laundry treatment machine, in particular tumble dryer
DE102014207434A1 (en) * 2014-04-17 2015-10-22 Robert Bosch Gmbh Method for operating a handheld power tool, power tool
DE102014217943A1 (en) 2014-09-08 2016-03-10 BSH Hausgeräte GmbH Method for operating a washing machine with a pressure sensor and suitable for this purpose washing machine
DE102015208648A1 (en) 2015-05-11 2016-11-17 BSH Hausgeräte GmbH A method for determining the mass when placing a laundry load in a laundry drum and laundry treating machine for performing the method
JP7442126B2 (en) * 2019-12-10 2024-03-04 青島海爾洗衣机有限公司 drum type washing machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4103961A1 (en) * 1991-02-09 1992-08-13 Licentia Gmbh Device to limit imbalance deviations - in oscillating container systems in household washing machines, to limit mechanical damage when electronic imbalance control fails
EP1167609B2 (en) * 2000-06-30 2007-09-12 Whirlpool Corporation Method for detecting and controlling the dynamic unbalance in a drum of a washing machine and washing machine that uses such method
DE102005037144B4 (en) * 2005-02-18 2007-04-19 Diehl Ako Stiftung & Co. Kg Vibratory suspended indoor unit of a laundry treatment machine with a vibration sensor
ITTO20050623A1 (en) * 2005-09-14 2007-03-15 Indesit Co Spa APPLIANCES FOR THE TREATMENT OF TEXTILE ITEMS WITH DISPLACEMENT SENSOR
JP4640476B2 (en) * 2008-09-19 2011-03-02 パナソニック株式会社 Washing machine
DE102010001845A1 (en) * 2010-02-11 2011-08-11 BSH Bosch und Siemens Hausgeräte GmbH, 81739 Device for monitoring oscillating device of e.g. washing machine, has oscillation monitoring unit comprising acceleration sensor for monitoring oscillation behavior of oscillating device, where sensor is integrally arranged in drive motor

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RU2014129739A (en) 2016-02-20
CN104011279A (en) 2014-08-27
CN104011279B (en) 2016-06-22
EP2794974A1 (en) 2014-10-29
DE102011089624A1 (en) 2013-06-27
WO2013092486A1 (en) 2013-06-27
RU2589475C2 (en) 2016-07-10
PL2794974T3 (en) 2016-02-29

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