EP0539617A1 - Unbalanced load detection for an automatic washing machine - Google Patents

Unbalanced load detection for an automatic washing machine Download PDF

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Publication number
EP0539617A1
EP0539617A1 EP91118534A EP91118534A EP0539617A1 EP 0539617 A1 EP0539617 A1 EP 0539617A1 EP 91118534 A EP91118534 A EP 91118534A EP 91118534 A EP91118534 A EP 91118534A EP 0539617 A1 EP0539617 A1 EP 0539617A1
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EP
European Patent Office
Prior art keywords
unbalance
microswitch
electric motor
control device
sensor
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Granted
Application number
EP91118534A
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German (de)
French (fr)
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EP0539617B1 (en
Inventor
Hans-Wilhelm Dipl.-Ing. Klein
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Siemens AG
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Siemens AG
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Application filed by Siemens AG filed Critical Siemens AG
Priority to ES91118534T priority Critical patent/ES2080876T3/en
Priority to DE59107166T priority patent/DE59107166D1/en
Priority to EP91118534A priority patent/EP0539617B1/en
Priority to TR92/0993A priority patent/TR26544A/en
Publication of EP0539617A1 publication Critical patent/EP0539617A1/en
Application granted granted Critical
Publication of EP0539617B1 publication Critical patent/EP0539617B1/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
    • 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 
    • D06F33/48—Preventing or reducing imbalance or noise
    • 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—Unbalance; Noise level

Definitions

  • the invention relates to an unbalance monitoring for a washing machine according to the preamble of claim 1; Such unbalance monitoring is generally known through obvious prior use.
  • the deflection of the elastically suspended suds container is measured via sensors arranged on the suds container, or the speed fluctuation of the washing drum is detected by a respective sensor and passed on to a monitoring device, which can be part of the regulating or control device; this requires separate connecting lines between the deflection sensor and the monitoring device in the first case, preferably used in analog speed control systems, or in the second case, preferably used in digital speed control systems, an additional evaluation circuit for the speed fluctuations supplied by the existing speed detection device.
  • the control device the different operating speeds in the washing or applying or spinning operation controlled or regulated; At the same time, it also monitors the functionality of the speed detection device, which supplies the actual values of the current speed of the electric motor. If an error occurs in the drive, e.g. a line break or a short circuit is detected, the motor is immediately stopped by the speed control element.
  • unbalance monitoring is provided with a speed detection device consisting of a rotor-side magnetic pole wheel and a stator-side Hall sensor with a digital output
  • the unbalance sensor is advantageously switched into the output line (Out) of the Hall sensor, in particular as a microswitch that opens in the event of an impermissible unbalance.
  • the unbalance sensor can advantageously be designed for the relatively small current or voltage ratios of the signal of the speed detection device and, in particular, can advantageously be carried out on two connecting lines which are otherwise to be additionally provided and to be laid, from a deflection sensor or to an addition which monitors the speed fluctuation
  • the control device can be dispensed with, since the control device can switch off the drive and then attempt to restart only by interrupting the existing connection line to the speed detection device.
  • FIG. 1 shows a AC series motor fed from a single-phase AC network R, M p via a program control unit PS, a regulating or control device RV and a triac semiconductor circuit as an electric motor M with an armature winding AB connected via a commutator and for this purpose via one of the Program control unit PS actuable reversing switch reversible switchable excitation winding EF.
  • the control device RV is essentially set by the program control unit PS speed setpoints and switching cycles with corresponding speeds and switching times for a washing, spin-up and spin operation.
  • FIG. 2 shows a DC series motor as an electric motor, which is fed from a single-phase AC network R, M p via a regulating or control device RV and a triac semiconductor circuit Tr via a commutation choke KD and is arranged in a rectifier bridge circuit D1-D4 and is intended for a washing machine drive M with an armature winding AB connected via a commutator motor and an excitation winding E; F1, F2 lying in series with a winding tap.
  • control with pulse width modulation can also be provided in a manner known per se.
  • a relay R1 that can be operated by the control device RV and a relay R2 that is also control-dependent by the control device RV are provided for reversing the direction of rotation.
  • the regulating or control device RV is given a specific direction of rotation and a specific rotational speed n Soll for the digital regulation provided here as essential target values.
  • a microswitch (MS) is now switched on in the circuit of the tachometer generator TG with the control device St in such a way that the tacho circuit is interrupted when the microswitch (MS) responds by opening when there is an impermissible imbalance, and thus the entire control unit RV Drive deactivated and e.g. can then be started again for a new start-up attempt.
  • FIG. 3 shows, as an alternative to FIGS. 1 and 2, instead of the tachometer generator TG that detects or monitors the speed, a magnetic pole wheel P that is coupled to the rotor shaft of the respective electric motor M and a stator-side Hall sensor IC that is assigned to it and that transmits signals that are proportional to the speed Regulatory or control device RV delivers.
  • an unbalance sensor is in turn switched on in the output line Out of the Hall sensor IC in such a way that when the unbalance sensor responds, the output line is interrupted and, accordingly, the entire output is switched off via the regulating or control device RV.
  • the microswitch MS is integrated in a manner not shown in the electric motor M, in particular by arranging it on its end plate; Since the electric motor is relatively rigidly attached to the tub, the movements are transmitted to the microswitch with sufficient force if the elastically suspended tub is deflected too much.

Abstract

In order, in the case of a variable-speed electric motor (M) monitored by a speed-measuring device (tacho-generator TG) in a control device (RV) and fed from an alternating current source (R; Mp), in particular a series motor, for an automatic washing machine, to be able to guarantee effective unbalance monitoring with a low outlay on construction and manufacture, the invention provides to connect in series with the tacho-generator (TG) an unbalance sensor, provided for the purpose of unbalance monitoring, in the form of a microswitch (MS) which opens when an impermissible unbalance is reached and thus interrupts the connection to the control device (RV). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Unwuchtüberwachung für einen Waschautomaten gemäß Oberbegriff des Anspruchs 1; eine derartige Unwuchtüberwachung ist durch offenkundige Vorbenutzung allgemein bekannt.The invention relates to an unbalance monitoring for a washing machine according to the preamble of claim 1; Such unbalance monitoring is generally known through obvious prior use.

Bei bekannten Unwuchtüberwachungen wird entweder über am Laugenbehälter angeordnete Sensoren die Auslenkung des elastisch aufgehängten Laugenbehälters gemessen oder es wird die Drehzahlschwankung der Waschtrommel von jeweils einem entsprechenden Sensor erfaßt und an eine Überwachungsvorrichtung weitergegeben, die Teil der Regel- bzw. Steuervorrichtung sein kann; dies erfordert im ersteren, vorzugsweise bei analog arbeitenden Drehzahlergelungen benutztem Fall gesonderte Anschlußleitungen zwischen dem Auslenkungssensor und der Überwachungsvorrichtung bzw. im zweiten vorzugsweise bei digital arbeitenden Drehzahlregelungen benutztem Fall eine zusätzliche Auswerteschaltung für die von der an sich vorhandenen Drehzahlerfassungsvorrichtung gelieferten Drehzahlschwankungen. Von der Steuervorrichtung werden u.a. die verschiedenen Betriebsdrehzahlen im Wasch-, bzw. Anlege- bzw. Schleuderbetrieb gesteuert bzw. geregelt; von ihr wird gleichzeitig auch die Funktionsfähigkeit der Drehzahlerfassungsvorrichtung überwacht, die die Ist-Werte der jeweils augenblicklichen Drehzahl des Elektromotors liefert. Wird ein Fehler im Antrieb, wie z.B. eine Leitungsunterbrechung oder ein Kurzschluß, erkannt, so erfolgt augenblicklich ein Stillsetzen des Motors über das Drehzahlstellglied.In known unbalance monitors, either the deflection of the elastically suspended suds container is measured via sensors arranged on the suds container, or the speed fluctuation of the washing drum is detected by a respective sensor and passed on to a monitoring device, which can be part of the regulating or control device; this requires separate connecting lines between the deflection sensor and the monitoring device in the first case, preferably used in analog speed control systems, or in the second case, preferably used in digital speed control systems, an additional evaluation circuit for the speed fluctuations supplied by the existing speed detection device. Among other things, the control device the different operating speeds in the washing or applying or spinning operation controlled or regulated; At the same time, it also monitors the functionality of the speed detection device, which supplies the actual values of the current speed of the electric motor. If an error occurs in the drive, e.g. a line break or a short circuit is detected, the motor is immediately stopped by the speed control element.

Gemäß Aufgabe vorliegender Erfindung soll eine Unwuchtüberwachung mit einem gegenüber den bekannten Lösungen wesentlich geringerem baulichen und fertigungstechnischen Aufwand ermöglicht werden; die Lösung dieser Aufgabe ist, ausgehend von einer Überwachungsvorrichtung der eingangs genannten Art durch die Lehre des Anspruchs 1 möglich; vorteilhafte Ausgestaltungen der Erfindung sind jeweils Gegenstand der Unteransprüche; als Elektromotoren sind bevorzugt AC-Reihenschlußmotoren bzw. DC-Reihenschlußmotoren mit jeweils einem kommutatorgespeisten Rotor vorgesehen.According to the object of the present invention, unbalance monitoring is to be made possible with a construction and manufacturing outlay which is considerably lower than with the known solutions will; the solution to this problem is possible, starting from a monitoring device of the type mentioned at the outset, by the teaching of claim 1; advantageous embodiments of the invention are the subject of the dependent claims; AC series motors or DC series motors, each with a commutator-fed rotor, are preferably provided as electric motors.

Ist eine Unwuchtüberwachung mit einer Drehzahlerfassungsvorrichtung bestehend aus einem rotorseitigen Magnet-Polrad und einem statorseitigen Hallsensor mit digitalem Ausgang, vorgesehen, so ist in vorteilhafter Weise der Unwuchtsensor, insbesondere als bei unzulässiger Unwucht öffnender Mikroschalter in die Ausgangsleitung (Out) des Hallsensors eingeschaltet.If unbalance monitoring is provided with a speed detection device consisting of a rotor-side magnetic pole wheel and a stator-side Hall sensor with a digital output, the unbalance sensor is advantageously switched into the output line (Out) of the Hall sensor, in particular as a microswitch that opens in the event of an impermissible unbalance.

Bei der erfindungsgemäßen Unwuchtüberwachung kann in vorteilhafter Weise der Unwuchtsensor für die relativ kleinen Strom- bzw. Spannungsverhältnisse des Signals der Drehzahlerfassungsvorrichtung ausgelegt und insbesondere kann in vorteilhafter Weise auf zwei ansonsten zusätzlich vorzusehende und zu verlegende Anschlußleitungen von einem Auslenkungssensor oder auf einen die Drehzahlschwankung überwachenden Zusatz der Regel- bzw. Steuervorrichtung verzichtet werden, da lediglich durch die Unterbrechung der an sich vorhandenen Verbindungsleitung zu der Drehzahlerfassungsvorrichtung die Steuervorrichtung den Antrieb abschalten und anschließend einen Neuanlauf versuchen kann.In the case of the unbalance monitoring according to the invention, the unbalance sensor can advantageously be designed for the relatively small current or voltage ratios of the signal of the speed detection device and, in particular, can advantageously be carried out on two connecting lines which are otherwise to be additionally provided and to be laid, from a deflection sensor or to an addition which monitors the speed fluctuation The control device can be dispensed with, since the control device can switch off the drive and then attempt to restart only by interrupting the existing connection line to the speed detection device.

Die Erfindung sowie weitere vorteilhafte Ausgestaltungen der Erfindung werden im folgenden anhand zweier schematisch dargestellter Ausführungsbeispiele näher erläutert; darin zeigen:

FIG 1
ein Prinzipschaltbild eines AC-Reihenschlußmotors für einen Waschgeräteantrieb mit einem Tachogenerator zur Drehzahlerfassung bzw. Drehzahlüberwachung und einer analog arbeitenden Steuer- bzw. Regelvorrichtung.
FIG 2
ein Prinzipschaltbild eines DC-Reihenschlußmotors für einen Waschgeräteantrieb mit einem Tachogenerator zur Drehzahlerfassung bzw. Drehzahlüberwachung und einer digital arbeitenden Steuer- bzw. Regelvorrichtung.
FIG 3
in einem Teilausschnitt der Schaltung gemäß FIG 1 bzw. 2 die Drehzahlerfassung und Drehzahlüberwachung mit einem rotorseitigen Magnet-Polrad und einem statorseitigen Hallsensor.
The invention and further advantageous refinements of the invention are explained in more detail below on the basis of two schematically illustrated exemplary embodiments; show in it:
FIG. 1
a schematic diagram of an AC series motor for a washing machine drive with a tachogenerator for speed detection or speed monitoring and an analog control device.
FIG 2
a schematic diagram of a DC series motor for a washing machine drive with a tachometer generator for speed detection or speed monitoring and a digitally operating control device.
FIG 3
in a partial section of the circuit according to FIG 1 or 2, the speed detection and speed monitoring with a rotor-side magnetic pole wheel and a stator-side Hall sensor.

FIG 1 zeigt einen aus einem Einphasen-Wechselstromnetz R, Mp über ein Programmsteuergerät PS, eine Regel- bzw. Steuervorrichtung RV und eine Triac-Halbleiterschaltung gespeisten AC-Reihenschlußmotor als Elektromotor M mit über einen Kommutator angeschlossener Ankerwicklung A-B und dazu über einen von dem Programmsteuergerät PS betätigbaren Drehrichtungsumkehrschalter umschaltbaren in Reibe liegenden Erregerwicklung E-F. Für die hier vorgesehene analoge Regelung werden der Regel- bzw. Steuervorrichtung RV von dem Programmsteuergerät PS im wesentlichen Drehzahlsollwerte und Schaltzyklen mit entsprechenden Drehzahlen und Schaltzeiten für einen Wasch-, Schleuderhochlauf- sowie Schleuderbetrieb vorgegeben.1 shows a AC series motor fed from a single-phase AC network R, M p via a program control unit PS, a regulating or control device RV and a triac semiconductor circuit as an electric motor M with an armature winding AB connected via a commutator and for this purpose via one of the Program control unit PS actuable reversing switch reversible switchable excitation winding EF. For the analog control provided here, the control device RV is essentially set by the program control unit PS speed setpoints and switching cycles with corresponding speeds and switching times for a washing, spin-up and spin operation.

FIG 2 zeigt einen aus einem Einphasen-Wechselstromnetz R, Mp über eine Regel- bzw. Steuervorrichtung RV und eine Triac-Halbleiterschaltung Tr über eine Kommutierungsdrossel KD gespeisten, in einer Gleichrichterbrückenschaltung D1 - D4 angeordneten, für einen Waschgeräteantrieb vorgesehenen DC-Reihenschlußmotor als Elektromotor M mit über einen Kommutatormotor angeschlossener Ankerwicklung A-B und einer damit in Reihe liegenden, mit einer Wicklungsanzapfung versehenen Erregerwicklung E;F1,F2. Anstelle der hier verwendeten Phasenanschnitt-Steuerung kann auch in an sich bekannter Weise eine Ansteuerung mit Pulsweitenmodulierung vorgesehen werden. Zur unterschiedlichen Wicklungsanzapfung der Erregerwicklung ist ein von der Regel- bzw. Steuervorrichtung RV bedienbares Relais R1 und für die Drehrichtungsumkehr ein ebenfalls von der Regel- bzw. Steuervorrichtung RV steuerabhängiges Relais R2 vorgesehen. Der Regel- bzw. Steuervorrichtung RV werden als wesentliche Sollwerte eine bestimmte Drehrichtung und eine bestimmte Drehzahl nsoll für die hier vorgesehene digitale Regelung vorgegeben.2 shows a DC series motor as an electric motor, which is fed from a single-phase AC network R, M p via a regulating or control device RV and a triac semiconductor circuit Tr via a commutation choke KD and is arranged in a rectifier bridge circuit D1-D4 and is intended for a washing machine drive M with an armature winding AB connected via a commutator motor and an excitation winding E; F1, F2 lying in series with a winding tap. Instead of the phase gating control used here, control with pulse width modulation can also be provided in a manner known per se. For different winding tapping of the field winding is a relay R1 that can be operated by the control device RV and a relay R2 that is also control-dependent by the control device RV are provided for reversing the direction of rotation. The regulating or control device RV is given a specific direction of rotation and a specific rotational speed n Soll for the digital regulation provided here as essential target values.

Zur Drehzahlerfassung und Drehzahlüberwachung dient in beiden Fällen ein mit der Rotorwelle des Elektromotors M drehabhängiger Tachogenerator TG, der derart in Steuerabhängigkeit mit der Regel bzw. Steuervorrichtung RV steht, daß bei irgendeiner durch den Tachogenerator TG angezeigten Betriebsstörung die Regel- bzw. Steuervorrichtung RV den Antrieb abschaltet.For speed detection and speed monitoring is used in both cases with the rotor shaft of the electric motor M tachogenerator TG, which is so dependent on the control with the control device RV that the control device RV drives the drive in the event of any malfunction indicated by the tachogenerator TG switches off.

Erfindungsgemäß ist nunmehr in den Stromkreis des Tachogenerators TG mit der Steuervorrichtung St ein Mikroschalter (MS) derart eingeschaltet, daß der Tachokreis bei Ansprechen des Mikroschalters (MS) durch Öffnen bei unzulässiger Unwucht unterbrochen und damit über die Regel- bzw. Steuervorrichtung RV auch der gesamte Antrieb außer Betrieb gesetzt und z.B. danach für einen neuen Anlaufversuch wieder gestartet werden kann wird.According to the invention, a microswitch (MS) is now switched on in the circuit of the tachometer generator TG with the control device St in such a way that the tacho circuit is interrupted when the microswitch (MS) responds by opening when there is an impermissible imbalance, and thus the entire control unit RV Drive deactivated and e.g. can then be started again for a new start-up attempt.

FIG 3 zeigt in Alternative zu FIG 1 bzw. 2 anstelle des die Drehzahl erfassenden bzw. die Drehzahl überwachenden Tachogenerators TG ein mit der Rotorwelle des jeweiligen Elektromotors M drehabhängig gekuppeltes Magnet-Polrad P und einen diesem zugeordneten statorseitigen Hallsensor IC, der drehzahlproportionale Signale an die Regel- bzw. Steuervorrichtung RV abgibt. Erfindungsgemäß ist in die Ausgangsleitung Out des Hallsensors IC wiederum ein Unwuchtsensor derart eingeschaltet, daß bei Ansprechen des Unwuchtsensors die Ausgangsleitung unterbrochen und dementsprechend über die Regel- bzw. Steuervorrichtung RV der gesamte Abtrieb abgeschaltet wird.3 shows, as an alternative to FIGS. 1 and 2, instead of the tachometer generator TG that detects or monitors the speed, a magnetic pole wheel P that is coupled to the rotor shaft of the respective electric motor M and a stator-side Hall sensor IC that is assigned to it and that transmits signals that are proportional to the speed Regulatory or control device RV delivers. According to the invention, an unbalance sensor is in turn switched on in the output line Out of the Hall sensor IC in such a way that when the unbalance sensor responds, the output line is interrupted and, accordingly, the entire output is switched off via the regulating or control device RV.

Der Mikroschalter MS ist in hier nicht näher dargestellter Weise in den Elektromotor M, insbesondere durch Anordnung an dessen Lagerschild integriert; da der Elektromotor relativ starr am Laugenbehälter befestigt ist, werden bei einer zu starken Unwuchtauslenkung des elastisch aufgehängten Laugenbehälters die Bewegungen hinreichend stark auf den Mikroschalter übertragen.The microswitch MS is integrated in a manner not shown in the electric motor M, in particular by arranging it on its end plate; Since the electric motor is relatively rigidly attached to the tub, the movements are transmitted to the microswitch with sufficient force if the elastically suspended tub is deflected too much.

Claims (9)

Unwuchtüberwachung für einen Waschautomaten mit einem mittels einer Drehzahlerfassungsvorrichtung (Tachogenerator TG) in einer Regelvorrichtung (RV) überwachten Elektromotor (M), insbesondere Reihenschlußmotor, dadurch gekennzeichnet, daß der die Unwucht erfassende Unwuchtsensor (Mikroschalter MS) in Reihe zu der Drehzahlerfassungsvorrichtung (Tachogenerator TG) angeschlossen ist und deren Verbindung zu der Regelvorrichtung (RV) bei Erreichen einer unzulässigen Unwucht unterbricht.Unbalance monitoring for an automatic washing machine with an electric motor (M), in particular a series motor, monitored by means of a speed detection device (tachogenerator TG) in a control device (RV), characterized in that the unbalance sensor (microswitch MS) detecting the unbalance in series with the speed detection device (tachogenerator TG) is connected and its connection to the control device (RV) is interrupted when an impermissible unbalance is reached. Unwuchtüberwachung nach Anspruch 1, gekennzeichnet durch einen AC-Reihenschlußmotor als Elektromotor (M).Unbalance monitoring according to claim 1, characterized by an AC series motor as an electric motor (M). Unwuchtüberwachung nach Anspruch 1, gekenzeichnet durch einen DC-Reihenschlußmotor als Elektromotor (M).Imbalance monitoring according to claim 1, characterized by a DC series motor as an electric motor (M). Unwuchtüberwachung mit einer Drehzahlerfassungsvorrichtung bestehend aus einem rotorseitigen Magnet-Polrad (P) und einem statorseitigen Hallsensor (IC) mit digitalem Ausgang nach einem der Ansprüche 1, dadurch gekennzeichnet, daß der Unwuchtsensor (Mikroschalter MS) in die Ausgangsleitung des Hallsensors (IC) eingeschaltet ist.Unbalance monitoring with a speed detection device consisting of a rotor-side magnetic pole wheel (P) and a stator-side Hall sensor (IC) with digital output according to one of Claims 1, characterized in that the unbalance sensor (microswitch MS) is switched on in the output line of the Hall sensor (IC) . Unwuchtüberwachung nach einem der Ansprüche 1-4, dadurch gekennzeichnet, daß als Unwuchtsensor ein bei unzulässicher Unwucht öffnender Mikroschalter (MS) vorgesehen ist.Unbalance monitoring according to one of claims 1-4, characterized in that a microswitch (MS) which opens when the unbalance is inadmissible is provided as the unbalance sensor. Unwuchtüberwachung nach einem der Ansprüche 1-5, dadurch gekennzeichnet, daß der Mikroschalter (MS) in engem mechanischem Kontakt zum Laugenbehälter des Waschautomaten angeordnet ist.Unbalance monitoring according to one of claims 1-5, characterized in that the microswitch (MS) is arranged in close mechanical contact with the washing machine's tub. Unwuchtüberwachung nach einem der Ansprüche 1-6, dadurch gekennzeichnet, daß der Mikroschalter (MS) in engem mechanischen Kontakt zu dem die Waschtrommel antreibenden Elektromotor (M) angeordnet ist.Unbalance monitoring according to one of claims 1-6, characterized in that the microswitch (MS) is arranged in close mechanical contact with the electric motor (M) driving the washing drum. Unwuchtüberwachung nach Anspruch 7, gekennzeichnet durch eine motorseitige Integrierung des Mikroschalters (MS) im Lagerschild des Elektromotors (M).Imbalance monitoring according to claim 7, characterized by motor-side integration of the microswitch (MS) in the end shield of the electric motor (M). Unwuchtüberwachung nach einem der Ansprüche 1-8, gekennzeichnet durch eine von der Funktonsfähigkeit der durch den Unwuchtsensor (Mikroschalter MS) schaltbaren Drehzahlerfassungsvorrichtung (Tachogenerator TG) betriebsabhängige Drehzahlsteuer- bzw. Drehzahlregelvorrichtung (St) für den Elektromotor (M).Unbalance monitoring according to one of claims 1-8, characterized by a speed control device (St) for the electric motor (M) which is dependent on the functionality of the speed detection device (tachogenerator TG) which can be switched by the unbalance sensor (microswitch MS).
EP91118534A 1991-10-30 1991-10-30 Unbalanced load detection for an automatic washing machine Expired - Lifetime EP0539617B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES91118534T ES2080876T3 (en) 1991-10-30 1991-10-30 UNBALANCE SUPERVISOR IN AN AUTOMATIC WASHING MACHINE.
DE59107166T DE59107166D1 (en) 1991-10-30 1991-10-30 Unbalance monitoring for a washing machine
EP91118534A EP0539617B1 (en) 1991-10-30 1991-10-30 Unbalanced load detection for an automatic washing machine
TR92/0993A TR26544A (en) 1991-10-30 1992-10-09 SEALESS CONTROL FOR AN AUTOMATIC WASHING MACHINE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91118534A EP0539617B1 (en) 1991-10-30 1991-10-30 Unbalanced load detection for an automatic washing machine

Publications (2)

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EP0539617A1 true EP0539617A1 (en) 1993-05-05
EP0539617B1 EP0539617B1 (en) 1995-12-27

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EP91118534A Expired - Lifetime EP0539617B1 (en) 1991-10-30 1991-10-30 Unbalanced load detection for an automatic washing machine

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EP (1) EP0539617B1 (en)
DE (1) DE59107166D1 (en)
ES (1) ES2080876T3 (en)
TR (1) TR26544A (en)

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AU745069B2 (en) * 1999-06-24 2002-03-07 Ipso-Usa, Inc. Control system for measuring load imbalance and optimizing spin speed in a laundry washing machine
EP1643027A1 (en) 2001-08-10 2006-04-05 BSH Bosch und Siemens Hausgeräte GmbH Household appliance with acceleration sensor

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU745069B2 (en) * 1999-06-24 2002-03-07 Ipso-Usa, Inc. Control system for measuring load imbalance and optimizing spin speed in a laundry washing machine
US6418581B1 (en) 1999-06-24 2002-07-16 Ipso-Usa, Inc. Control system for measuring load imbalance and optimizing spin speed in a laundry washing machine
US6564592B2 (en) 1999-06-24 2003-05-20 Ispo-Usa, Inc. Control system for measuring load imbalance and optimizing spin speed in a laundry washing machine
EP1643027A1 (en) 2001-08-10 2006-04-05 BSH Bosch und Siemens Hausgeräte GmbH Household appliance with acceleration sensor
US7536881B2 (en) 2001-08-10 2009-05-26 Bsh Bosch Und Siemens Hausgeraete Gmbh Linen treatment device with imbalance monitoring, level monitoring or load monitoring
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TR26544A (en) 1995-03-15
DE59107166D1 (en) 1996-02-08
EP0539617B1 (en) 1995-12-27
ES2080876T3 (en) 1996-02-16

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