EP0657576A1 - Automatically controlled washing machine - Google Patents
Automatically controlled washing machine Download PDFInfo
- Publication number
- EP0657576A1 EP0657576A1 EP94117195A EP94117195A EP0657576A1 EP 0657576 A1 EP0657576 A1 EP 0657576A1 EP 94117195 A EP94117195 A EP 94117195A EP 94117195 A EP94117195 A EP 94117195A EP 0657576 A1 EP0657576 A1 EP 0657576A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- washing machine
- foam
- drum
- speed
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/06—Arrangements for preventing or destroying scum
-
- 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
- D06F34/08—Control circuits or arrangements thereof
-
- 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
- D06F37/30—Driving arrangements
- D06F37/304—Arrangements or adaptations of electric motors
-
- 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
- D06F2103/20—Washing liquid condition, e.g. turbidity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/24—Spin speed; Drum movements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
- D06F2103/46—Current or voltage of the motor driving the drum
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
- D06F2105/48—Drum speed
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
Definitions
- the invention is based on an automatically controlled washing machine with a drive motor, the speed of which can be adjusted with a speed control circuit on the basis of a phase control and determined according to target and actual speed values, and which drives the laundry drum with several different ones. Speeds for washing, rinsing and spinning.
- the invention is therefore based on the object of finding a way for reliable foam detection that arises without additional components.
- the speed values are already present as electrical quantities in the speed control circuit of a modern washing machine and a load-dependent electrical quantity can also be an existing value in the speed control circuit for the motor current or the phase angle of the motor current, so that there is no additional value for the foam detection according to the invention Components required.
- the washing machine according to the invention is further developed in that when the signal is applied with a quantity that suggests the presence of a quantity of foam that is braking the drum, the centrifugal drive of the drum can be switched off at least for a limited period.
- the foam at the bottom of the tub may collapse while the centrifugal drive is switched off.
- the remaining lye residues are according to a further advantageous development the washing machine according to the invention can be pumped out by a drain pump during the switch-off period of the centrifugal drive
- the drum can be reversely driven in the gentle cycle while the centrifugal drive is switched off.
- the gentle cycle is carried out regularly at such low speeds that the drum movement does not generate any more foam, but smashes the existing foam bubbles.
- a further advantageous embodiment of the washing machine according to the invention can provide effective remedial action, in which a further rinse cycle can be initiated after a braking amount of foam has been determined.
- a further rinse cycle can be initiated after a braking amount of foam has been determined.
- Great compactness or a large amount of foam each lead to a strong braking moment on the drum, which can be estimated with certainty in its scope from the three parameters mentioned above.
- one or the other measure can be initiated.
- the further rinse cycle can also be carried out in a particularly advantageous manner with an increased alkali level when a further rinse cycle is initiated.
- FIGS. 1 and 2 show the course of the motor current i over time t and the associated drum speed n over time. Proportional to the current shown through the drum drive motor is the phase angle, which can be taken directly from the control circuit for the drum drive motor as a control variable.
- the same item of laundry has always been examined in a single washing machine.
- the laundry item was rinsed well at the beginning of the spin section and without any residual surfactant content in the lye still present in the laundry.
- the drive motor is switched on and accelerated to around 100 min ⁇ 1, a needle-like increase in the motor current to 4.5 A can be observed, which then occurs at approximately 1.2 A.
- the needle-like increase in the motor current i is already significantly smaller (up to about 2.4 A).
- the laundry movement that has already been initiated reduces the inertia.
- the motor current falls below 1.4 A.
- the quiescent current measurement is more than 0 A, it is because the total current consumption of the washing machine was measured when recording the current diagrams.
- the Current consumption without motor activation is only about 500 mA and is therefore negligible compared to the high current consumption of the drive motor.
- the laundry item observed for recording the diagram in FIG. 2 still contained foam-forming lye.
- the current curve in the diagram during the spin-up phase until reaching about 220 min ⁇ 1 is about the same as that in the diagram of Figure 1.
- the level of current consumption during the speed plateau 100 min ⁇ 1 and the drop in current after the needle tip when accelerating to about 220 min ⁇ 1 is already significantly higher than in the corresponding sections in Fig. 2.
- Fig. 4 shows that the control circuit designed according to the invention breaks off the beginning of the spin section during the ascent ramp at a little above 400 min ⁇ 1, because the motor current had risen well above 4.5 A, and the speed which is no longer as shown in Fig. 3 apparent target course could follow. This can lead to an excessive load on the laundry drum due to external influences, for. B. closed by foam braking.
- the undesirable operating condition - as assumed in the diagrams - the increase in the motor current itself or the phase angle of the motor power supply and the ratio of the target speed to the actual speed can be observed.
- At least one further rinse cycle should be initiated after a braking amount of foam has been found in the tub.
- Such a further rinse cycle would further reduce the residual surfactant content in the lye and thus reduce the risk of renewed foaming.
- a new spin start attempt could be made. If necessary, such additional rinses can be carried out with an increased lye level.
- control circuit can be designed such that the number of rinsing cycles already installed by the manufacturer and a spin start attempt are carried out, but then this first start attempt is followed by a number of rinse cycles corresponding to the learned experience before the next spin start attempt.
Abstract
Description
Die Erfindung geht aus von einer automatisch gesteuerten Waschmaschine mit einem Antriebsmotor, dessen Drehzahl mit einer Drehzahl-Regelschaltung auf der Basis einer Phasenanschnittsteuerung einstellbar und nach Soll- und Istdrehzahlwerten bestimmbar ist und der zum Antrieb der Wäschetrommel mit mehreren unterschiedlichen. Drehzahlen zum waschen, Spülen und Schleudern dient.The invention is based on an automatically controlled washing machine with a drive motor, the speed of which can be adjusted with a speed control circuit on the basis of a phase control and determined according to target and actual speed values, and which drives the laundry drum with several different ones. Speeds for washing, rinsing and spinning.
In einer bekannten Waschmaschine dieser Art (DE 36 38 498 A1) wird zur Bestimmung der Anwesenheit von Schaum mittels eines zur Niveaubestimmung bekannten Drucksensors der im sogenannten Sumpf der Waschmaschine vorhandene Druck gemessen und daraus auf Schauman- oder -abwesenheit geschlossen. Es hat sich aber gezeigt, daß auch Druckstöße, die auf das im Sumpf noch vorhandene Restwasser von Seiten der Laugenpumpe her einwirken, ein so hohes Laugenniveau im Laugenbehälter vortauschen, daß keinesfalls ein Schleudergang betrieben werden dürfte, zum Abbruch des Schleuderns fuhren würden. Daher ist diese Art der Schaumerkennung unsicher. Außerdem fordert die gleichzeitige Verwendung des Druckgebers zur Laugenniveauerkennung und zur Schaumerkennung mindestens einen zusätzlichen Umschalter, der den Aufwand an Bauelementen erhöht.In a known washing machine of this type (DE 36 38 498 A1), the pressure present in the so-called sump of the washing machine is measured to determine the presence of foam by means of a pressure sensor known for level determination, and conclusions are drawn therefrom that there is or no foam. However, it has been shown that pressure surges, which act on the residual water still present in the sump from the side of the drain pump, exchange such a high level of alkali in the tub that under no circumstances should a spin cycle be carried out that the spin cycle would be terminated. This type of foam detection is therefore unsafe. In addition, the simultaneous use of the pressure sensor for lye level detection and for foam detection requires at least one additional switch, which increases the expenditure on components.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Möglichkeit zur sicheren Schaumerkennung zu finden, die ohne zusätzliche Bauelemente aufkommt.The invention is therefore based on the object of finding a way for reliable foam detection that arises without additional components.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß der Steuerschaltung der Waschmaschine während eines Schleuderabschnitts ein Signal zuführbar ist, das ein Maß für eine unerwünschte Bremsung der Wäschetrommel (z.B. durch Schaumbildung) und von dem Verhältnis der folgenden Parameter des Antriebsmotor-Betriebs zueinander bestimmt ist:
- a) Solldrehzahl,
- b) Istdrehzahl und
- c) eine belastungsabhängige elektrische Größe.
- a) target speed,
- b) actual speed and
- c) a load-dependent electrical quantity.
Die Drehzahlwerte liegen als elektrische Größen in der Drehzahl-Regelungsschaltung einer modernen Waschmaschine ohnehin vor und eine belastungsabhängige elektrische Größe kann ebenfalls ein in der Drehzahl-Regelungsschaltung vorhandendener Wert für den Motorstrom oder den Phasenanschnittwinkel des Motorstroms sein, so daß es für die erfindungsgemäße Schaumerkennung keiner zusätzlichen Bauteile bedarf.The speed values are already present as electrical quantities in the speed control circuit of a modern washing machine and a load-dependent electrical quantity can also be an existing value in the speed control circuit for the motor current or the phase angle of the motor current, so that there is no additional value for the foam detection according to the invention Components required.
In besonders vorteilhafter Weise wird die erfindungsgemäße Waschmaschine dadurch weitergebildet, daß beim Anliegen des Signals mit einer Größe, die auf das Vorhandensein einer die Trommel bremsenden Schaummenge schließen läßt, der Schleuderantrieb der Trommel zumindest für eine begrenzte Dauer ausschaltbar eingerichtet ist. Während der Ausschaltdauer des Schleuderantriebs kann der Schaum am Boden des Laugenbehälters zusammenfallen. Die verbleibenden Laugenrückstände sind gemäß einer weiteren vorteilhaften Weiterbildung der erfindungsgemäßen Waschmaschine während der Ausschaltdauer des Schleuderantriebs durch eine Laugenpumpe abpumpbar.In a particularly advantageous manner, the washing machine according to the invention is further developed in that when the signal is applied with a quantity that suggests the presence of a quantity of foam that is braking the drum, the centrifugal drive of the drum can be switched off at least for a limited period. The foam at the bottom of the tub may collapse while the centrifugal drive is switched off. The remaining lye residues are according to a further advantageous development the washing machine according to the invention can be pumped out by a drain pump during the switch-off period of the centrifugal drive
Zur Beschleunigung des Schaumabbaues kann gemäß einer weiteren vorteilhaften Ausbildung der erfindungsgemäßen Waschmaschine während der Ausschaltdauer des Schleuderantriebs die Trommel im Schongang reversierend angetrieben werden. Der Schongang wird regelmäßig mit so niederen Drehzahlen durchgeführt, daß die Trommelbewegung keinen weiteren Schaum erzeugt, sondern die vorhandenen Schaumblasen zerschlägt.In order to accelerate the foam breakdown, according to a further advantageous embodiment of the washing machine according to the invention, the drum can be reversely driven in the gentle cycle while the centrifugal drive is switched off. The gentle cycle is carried out regularly at such low speeds that the drum movement does not generate any more foam, but smashes the existing foam bubbles.
Bei umfangreicher Schaummenge kann eine weitere vorteilhafte Ausbildung der erfindungsgemäßen Waschmaschine für wirksame Abhilfe sorgen, bei der nach der Feststellung einer bremsenden Schaummenge ein weiterer Spülgang einleitbar ist. Große Kompaktheit oder eine große Schaummenge führen jeweils zu einem starken Bremsmoment an der Trommel, das sich aus den oben genannten drei Parametern mit ziemlicher Sicherheit auch in seinem Umfang einschätzen läßt. In Abhängigkeit von der auf diese Weise festgestellten Schaummenge kann die eine oder die andere Maßnahme eingeleitet werden. Im Verfolg solcher Maßnahmen kann auch bei Einleitung eines weiteren Spülganges in besonders vorteilhafter Weise der weitere Spülgang mit einem erhöhten Laugenniveau durchgeführt werden.In the case of a large amount of foam, a further advantageous embodiment of the washing machine according to the invention can provide effective remedial action, in which a further rinse cycle can be initiated after a braking amount of foam has been determined. Great compactness or a large amount of foam each lead to a strong braking moment on the drum, which can be estimated with certainty in its scope from the three parameters mentioned above. Depending on the amount of foam determined in this way, one or the other measure can be initiated. Following such measures, the further rinse cycle can also be carried out in a particularly advantageous manner with an increased alkali level when a further rinse cycle is initiated.
Anhand von in der Zeichnung dargestellten Diagrammen der Motordrehzahlen und des Motorstroms über der Zeit sind die Abhängigkeiten von Schleuderabschnitten und Schaumentwicklung gut zu erkennen.On the basis of the diagrams of the motor speeds and the motor current over time, the dependencies between the centrifuge sections and the development of foam can be clearly seen.
Die Diagramme in den Figuren 1 und 2 zeigen den Verlauf des Motorstroms i über der Zeit t und der dazugehörigen Trommeldrehzahl n über der Zeit. Proportional dem dargestellten Strom durch den Trommelantriebsmotor ist der Phasenanschnittwinkel, der als Steuergröße aus der Regelungsschaltung für den Trommelantriebsmotor unmitelbar entnommen werden kann.The diagrams in FIGS. 1 and 2 show the course of the motor current i over time t and the associated drum speed n over time. Proportional to the current shown through the drum drive motor is the phase angle, which can be taken directly from the control circuit for the drum drive motor as a control variable.
Für alle dargestellten Diagramme ist in einer einzigen Waschmaschine immer derselbe Wäscheposten untersucht worden. Im Diagramm der Figur 1 war der Wäscheposten zu Beginn des Schleuderabschnitts gut gespült und ohne schaumbildenden Rest-Tensidgehalt in der in der Wäsche noch vorhandenen Lauge. Beim Einschalten des Antriebsmotors und seiner Beschleunigung auf etwa 100 min⁻¹ ist ein nadelartiger Anstieg des Motorstroms bis auf 4,5 A zu verzeichnen, der sich danach bei ungefähr 1,2 A einstellt. Beim weiteren Beschleunigen aus 100 min⁻¹ bis auf etwa 240 min⁻¹ fällt der nadelartige Anstieg des Motorstromes i schon bedeutend kleiner aus (bis etwa 2,4 A). Hier wirkt sich die bereits eingeleitete Wäschebewegung trägheitsvermindernd aus. Bei der Ruhe-Drehzahl von etwa 240 min⁻¹ fällt der Motorstrom unter 1,4 A zurück. Während einer nunmehr flach ansteigenden Rampe für die Motordrehzahl bis auf etwa 800 min⁻¹ steigt der Motorstrom nur langsam über 1,5 A an. Beim Verharren der Trommeldrehzahl bei etwa 800 min⁻¹ fällt der Motorstrom wieder auf etwa 1,5 A zurück. Nach einer kurzen Ausschalt-Stromspitze geht der Motorstrom i wieder auf 0 zurück und die Drehzahl fällt rasch bis auf 0 min⁻¹ ab.For all of the diagrams shown, the same item of laundry has always been examined in a single washing machine. In the diagram in FIG. 1, the laundry item was rinsed well at the beginning of the spin section and without any residual surfactant content in the lye still present in the laundry. When the drive motor is switched on and accelerated to around 100 min⁻¹, a needle-like increase in the motor current to 4.5 A can be observed, which then occurs at approximately 1.2 A. With further acceleration from 100 min⁻¹ to about 240 min⁻¹, the needle-like increase in the motor current i is already significantly smaller (up to about 2.4 A). Here, the laundry movement that has already been initiated reduces the inertia. At the idle speed of about 240 min⁻¹, the motor current falls below 1.4 A. During a ramp that now rises gently for the motor speed up to about 800 min⁻¹, the motor current only rises slowly above 1.5 A. If the drum speed remains at around 800 rpm, the motor current drops back to around 1.5 A. After a brief switch-off current peak, the motor current i drops back to 0 and the speed drops rapidly to 0 min⁻¹.
Wenn die Ruhestrom-Messung mehr als 0 A ergibt, so liegt das daran, daß bei der Aufzeichnung der Stromdiagramme die Gesamtstromaufnahme der Waschmaschine gemessen wurde. Die Stromaufnahme ohne Motoreinschaltung beträgt jedoch nur etwa 500 mA und ist daher gegenüber der hohen Stromaufnahme des Antriebsmotors vernachlässigbar.If the quiescent current measurement is more than 0 A, it is because the total current consumption of the washing machine was measured when recording the current diagrams. The Current consumption without motor activation is only about 500 mA and is therefore negligible compared to the high current consumption of the drive motor.
Der zur Aufzeichnung des Diagrammes in Figur 2 beobachtete Wäscheposten enthielt noch schaumbildende Lauge. Grundsätzlich verläuft die Strom-Kurve im Diagramm während der Schleuder-Anlaufphase bis zum Erreichen von etwa 220 min⁻¹ etwa so wie diejenige im Diagramm der Figur 1. Da jedoch bereits etwas Schaum zwischen dem Laugenbehälter und der sich drehenden Wäschetrommel vorhanden sein mußte, ist das Niveau der Stromaufnahme während des Drehzahl-Plateaus 100 min⁻¹ sowie der Abfall des Stroms nach der Nadelspitze bei der Beschleunigung auf etwa 220 min⁻¹ bereits deutlich höher als in den entsprechenden Abschnitten in Fig. 2. Zunächst wird aus dem Plateau von 220 min⁻¹ auch beim Versuch gemäß Fig. 2 die Wäschetrommel entlang einer Rampe bis etwa t = 2 min beschleunigt, wobei ihr offensichtlich bremsender Schaum entgegensteht. Dies äußert sich in einem starken Anstieg des Motorstromes bis etwas über 4,5 A, der nunmehr seine Leistungsgrenze erreicht und die Trommel nun nicht mehr gegen das vom Schaum erzeugte Bremsmoment weiter beschleunigen kann. Daher bleibt die Trommeldrehzahl bei etwa 400 min⁻¹ erhalten. Diese Tatsache verursacht zwei bedeutende Nachteile: Einerseits wird der Trommelmotor häufig zu hoch belastet (z.B. statt Nennleistung 300W eine tatsächliche Leistungsaufnahme von 750W). Dadurch überhitzt sich der Motor und verschleißt vorzeitig. Andererseits wird die Wäsche häufig bei reduzierter Schleuderdrehzahl nur ungenügend entwässert. Außerdem wird durch den starken mechanischen Eintrag in die abgeschleuderte Lauge durch die schleudernde Trommel die weitere Schaumbildung sehr intensiviert; die Schaumbekämpfung wird also nochmals erschwert.The laundry item observed for recording the diagram in FIG. 2 still contained foam-forming lye. Basically, the current curve in the diagram during the spin-up phase until reaching about 220 min⁻¹ is about the same as that in the diagram of Figure 1. However, since there should already be some foam between the tub and the rotating drum the level of current consumption during the
Nach Abbruch des Antriebs fallen konsequenterweise der Motorstrom sowie die Wäschetrommel-Drehzahl wieder auf 0 zurück.After the drive has been terminated, the motor current and the washing drum speed consequently drop back to 0.
Bei den Aufzeichnungen für die Diagramme in den Figuren 3 und 4 ist für die Steuerung des Antriebsmotors eine erfindungsgemäße Steuerschaltung verwendet worden, der ein Signal zugeführt werden kann, das ein Maß für eine unerwünschte Bremsung, z. B. durch Schaumbildung, der Wäschetrommel ist. Darin ist erkennbar, daß bei dem für das Diagramm in Fig. 3 vorgenommenen Versuch - gleiche Wäschemenge und sonst gleiche Bedingungen vorausgesetzt - sich etwa gleiche Ergebnisse im Verhältnis der jeweiligen Drehzahlen zu den benötigten Motor-Stromwerten einstellen. Der frühere Abbruch des Drehzahlplateaus zwischen 700 und 800 min⁻¹ bei etwa 3 2/3 Minuten im Gegensatz zu etwas mehr als 4 Minuten im Beispiel der Fig. 1 ist auf eine Programmänderung zurückzuführen, die mit einer etwaigen Schaumbildung nichts zu tun hat.In the recordings for the diagrams in FIGS. 3 and 4, a control circuit according to the invention has been used for the control of the drive motor, which control circuit can be supplied with a signal which is a measure of undesired braking, e.g. B. by foam formation, the laundry drum. It can be seen that in the test carried out for the diagram in FIG. 3 — assuming the same amount of laundry and otherwise the same conditions — approximately the same results are obtained in the ratio of the respective speeds to the required motor current values. The earlier termination of the speed plateau between 700 and 800 min⁻¹ at about 3 2/3 minutes in contrast to a little more than 4 minutes in the example of FIG. 1 is due to a program change that has nothing to do with any foam formation.
Demgegenüber zeigt Fig. 4, daß die erfindungsgemäß ausgestaltete Steuerschaltung während der Anstiegsrampe bei etwas oberhalb von 400 min⁻¹ den beginnenden Schleuderabschnitt abbricht, weil der Motorstrom weit über 4,5 A angestiegen war, und die sich einstellende Drehzahl nicht mehr dem in Fig. 3 ersichtlichen Sollverlauf folgen konnte. Daraus kann also auf eine übermäßige Belastung der Wäschetrommel durch äußere Einflüsse, z. B. durch Schaumbremsung, geschlossen werden. Zur Überwachung dieser unerwünschten Betriebsbedingung kann - wie in den Diagrammen angenommen - der Anstieg des Motorstromes selbst oder der Phasenanschnittwinkel der Motor-Stromversorgung sowie des Verhältnisses der Solldrehzahl zur Istdrehzahl beobachtet werden.In contrast, Fig. 4 shows that the control circuit designed according to the invention breaks off the beginning of the spin section during the ascent ramp at a little above 400 min⁻¹, because the motor current had risen well above 4.5 A, and the speed which is no longer as shown in Fig. 3 apparent target course could follow. This can lead to an excessive load on the laundry drum due to external influences, for. B. closed by foam braking. To monitor this undesirable operating condition - as assumed in the diagrams - the increase in the motor current itself or the phase angle of the motor power supply and the ratio of the target speed to the actual speed can be observed.
Gemäß vorteilhafter Weiterbildungen der Erfindung kann aus diesem Abbruch des Schleuderanlaufes eine weitere Konsequenz im vorausliegenden Programmablauf geschaltet werden. Zunächst kann es wichtig sein, den Schleuderantrieb der Trommel zumindest für eine begrenzte Dauer auszuschalten. Vorteilhaft wäre, während der Ausschaltdauer des Schleuderantriebs die Laugenpumpe der Waschmaschine weiterhin anzutreiben, damit Lauge, die sich aus zusammenbrechendem Schaum weiterhin sammelt, sofort aus dem Laugenbehälter abgeführt werden kann. Lauge, die nicht mehr im Laugenbehälter verbleibt, kann an weiterer Schaumbildung nicht mehr teilnehmen.According to advantageous developments of the invention, a further consequence in the program run ahead can be switched from this termination of the spin start. First of all, it can be important to switch off the centrifugal drive of the drum at least for a limited period. It would be advantageous to continue to drive the drain pump of the washing machine during the switch-off period of the centrifugal drive, so that liquor, which continues to collect from collapsing foam, can be immediately removed from the tub. Lye that no longer remains in the tub can no longer participate in further foam formation.
Damit ferner die Schaumbildung bei einem anschließenden Schleudergang vermieden wird, sollte nach Feststellung einer bremsenden Schaummenge im Laugenbehälter mindestens ein weiterer Spülgang eingeleitet werden. Ein solcher weiterer Spülgang würde den Rest-Tensidgehalt der Lauge weiter herabsetzen und damit die Gefahr erneuter Schaumbildung verringern. Nach Abschluß des weiteren Spülganges könnte ein neuer Schleuderanlauf-Versuch unternommen werden. Nach Bedarf können solche weiteren Spülgänge mit einem erhöhten Laugenniveau durchgeführt werden.In order to further avoid foam formation during a subsequent spin cycle, at least one further rinse cycle should be initiated after a braking amount of foam has been found in the tub. Such a further rinse cycle would further reduce the residual surfactant content in the lye and thus reduce the risk of renewed foaming. After completing the further rinse cycle, a new spin start attempt could be made. If necessary, such additional rinses can be carried out with an increased lye level.
Von besonderem Wert für eine komfortable Bedienung der Waschmaschine, bei der die Bremsung durch Waschmittelschaum von vornherein berücksichtigt werden könnte, wäre eine Anordnung in der Steuerschaltung, welche die Anzahl der bei Schaumentwicklung abgebrochenen Schleuderanlauf-Versuche speichert und aus gewissen Häufigkeiten von derartigen Anzahlen für zukünftige Behandlungsprozesse eine dem gelernten Erfahrungswert entsprechende Anzahl von Spülgängen der herstellerseits bereits installierten Anzahl von Spülgängen von vornherein hinzufügt. Hierbei wäre es jedoch von Vorteil, wenn nach einer festgelegten Anzahl von Behandlungsprozessen immer wieder der Versuch mit der herstellerseits installierten Anzahl von Spülgängen vorgenommen wird, um zu testen, ob die Bedienungsperson ihr Bedienungsverhalten, z.B. durch Wechsel des Waschmittels, verändert hat. Alternativ dazu kann aber die Steuerschaltung so ausgebildet sein, daß grundsätzlich die herstellerseits bereits installierte Anzahl von Spülgängen und ein Schleuderanlauf-Versuch vorgenommen werden, dann aber diesem ersten Anlaufversuch eine dem erlernten Erfahrungswert entsprechende Anzahl von Spülgängen vor dem nächsten Schleuderanlauf-Versuch nachgeschaltet ist.Of particular value for convenient operation of the washing machine, in which braking by detergent foam could be taken into account from the outset, would be an arrangement in the control circuit which stores the number of spin-off attempts stopped during foam development and from certain frequencies of such numbers for future treatment processes a number of rinse cycles corresponding to the learned experience the number of rinses already installed by the manufacturer is added from the outset. In this case, however, it would be advantageous if, after a fixed number of treatment processes, the test was repeatedly carried out with the number of rinse cycles installed by the manufacturer in order to test whether the operator changed their operating behavior, for example by changing the detergent. Alternatively, however, the control circuit can be designed such that the number of rinsing cycles already installed by the manufacturer and a spin start attempt are carried out, but then this first start attempt is followed by a number of rinse cycles corresponding to the learned experience before the next spin start attempt.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4342274 | 1993-12-10 | ||
| DE4342274A DE4342274A1 (en) | 1993-12-10 | 1993-12-10 | Automatically controlled washing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0657576A1 true EP0657576A1 (en) | 1995-06-14 |
| EP0657576B1 EP0657576B1 (en) | 1999-09-15 |
Family
ID=6504739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94117195A Expired - Lifetime EP0657576B1 (en) | 1993-12-10 | 1994-10-31 | Automatically controlled washing machine |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0657576B1 (en) |
| KR (1) | KR100348768B1 (en) |
| DE (2) | DE4342274A1 (en) |
| ES (1) | ES2138024T3 (en) |
| HR (1) | HRP940895B1 (en) |
| PL (1) | PL176927B1 (en) |
| TR (1) | TR28684A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1346094A1 (en) * | 2000-12-01 | 2003-09-24 | Lg Electronics Inc. | Method for controlling spinning speed in drum-type washing machine |
| WO2004097099A1 (en) * | 2003-04-28 | 2004-11-11 | Emerson Electric Co. | Method and system for determining a washing machine load unbalance |
| WO2004111325A1 (en) * | 2003-06-12 | 2004-12-23 | BSH Bosch und Siemens Hausgeräte GmbH | Washing and rinsing method for a washing machine |
| WO2006124535A1 (en) * | 2005-05-12 | 2006-11-23 | Emerson Electric Co. | Method and system for operating a clothes washing machine |
| WO2007074037A1 (en) * | 2005-12-29 | 2007-07-05 | Arcelik Anonim Sirketi | A washing machine and a control method |
| WO2011042456A1 (en) * | 2009-10-07 | 2011-04-14 | BSH Bosch und Siemens Hausgeräte GmbH | Method for treating foam, correspondingly programmed control device and corresponding laundry treatment machine |
| WO2016156069A1 (en) * | 2015-04-01 | 2016-10-06 | BSH Hausgeräte GmbH | Method for operating a washing machine with foam detection by way of a motor current analysis and washing machine suitable therefor |
| CN114108232A (en) * | 2021-12-02 | 2022-03-01 | Tcl家用电器（合肥）有限公司 | Foam amount prediction method and device, storage medium and washing equipment |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19839896A1 (en) * | 1998-09-02 | 2000-03-09 | Miele & Cie | Washing machine with a device for determining the weight of the laundry |
| KR20000059490A (en) * | 1999-03-04 | 2000-10-05 | 구자홍 | Method for clean controlling of washing machine |
| DE10234472A1 (en) * | 2002-07-29 | 2004-02-12 | BSH Bosch und Siemens Hausgeräte GmbH | A method for preventing wash liquor foam inhibiting pump performance in a horizontal drum automatic washing machine has a foam detector controlling the drive motor for the drum |
| DE102007033492A1 (en) * | 2007-07-18 | 2009-01-22 | BSH Bosch und Siemens Hausgeräte GmbH | Process for controlling foam production in a washing machine and washing machine suitable for this purpose |
| DE102008028030A1 (en) | 2008-06-12 | 2009-12-24 | BSH Bosch und Siemens Hausgeräte GmbH | Method and device for determining foam in a washing machine |
| DE102015205945A1 (en) * | 2015-04-01 | 2016-10-06 | BSH Hausgeräte GmbH | Method for operating a washing machine with foam detection by a drum speed evaluation and this suitable washing machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4410329A (en) * | 1981-11-06 | 1983-10-18 | General Electric Company | Washing machine with oversuds detection and correction capability |
| GB2155051A (en) * | 1984-02-29 | 1985-09-18 | Fisher & Paykel | Improvements in or relating to clothes washing machines |
| GB2168497A (en) * | 1984-12-18 | 1986-06-18 | Toshiba Kk | Load state detecting apparatus of an induction motor |
| FR2577949A1 (en) * | 1985-02-28 | 1986-08-29 | Esswein Sa | Washing and spinning machine with a variable spinning time |
| GB2202332A (en) * | 1987-03-14 | 1988-09-21 | Toshiba Kk | Washing weight detection and washing operation control system |
| FR2639661A1 (en) * | 1988-11-30 | 1990-06-01 | Licentia Gmbh | WASHING MACHINE CONTROLLED BY PROGRAM |
| DE4117292A1 (en) * | 1990-06-02 | 1991-12-05 | Miele & Cie | Controlling washing procedure in washing machine - by taking into account effects of water jacket formation in spinning step of program |
-
1993
- 1993-12-10 DE DE4342274A patent/DE4342274A1/en not_active Withdrawn
-
1994
- 1994-10-31 ES ES94117195T patent/ES2138024T3/en not_active Expired - Lifetime
- 1994-10-31 EP EP94117195A patent/EP0657576B1/en not_active Expired - Lifetime
- 1994-10-31 DE DE59408745T patent/DE59408745D1/en not_active Expired - Lifetime
- 1994-11-03 HR HR940895A patent/HRP940895B1/en not_active IP Right Cessation
- 1994-11-17 TR TR01218/94A patent/TR28684A/en unknown
- 1994-12-09 KR KR1019940033381A patent/KR100348768B1/en not_active IP Right Cessation
- 1994-12-09 PL PL94306202A patent/PL176927B1/en not_active IP Right Cessation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4410329A (en) * | 1981-11-06 | 1983-10-18 | General Electric Company | Washing machine with oversuds detection and correction capability |
| GB2155051A (en) * | 1984-02-29 | 1985-09-18 | Fisher & Paykel | Improvements in or relating to clothes washing machines |
| GB2168497A (en) * | 1984-12-18 | 1986-06-18 | Toshiba Kk | Load state detecting apparatus of an induction motor |
| FR2577949A1 (en) * | 1985-02-28 | 1986-08-29 | Esswein Sa | Washing and spinning machine with a variable spinning time |
| GB2202332A (en) * | 1987-03-14 | 1988-09-21 | Toshiba Kk | Washing weight detection and washing operation control system |
| FR2639661A1 (en) * | 1988-11-30 | 1990-06-01 | Licentia Gmbh | WASHING MACHINE CONTROLLED BY PROGRAM |
| DE4117292A1 (en) * | 1990-06-02 | 1991-12-05 | Miele & Cie | Controlling washing procedure in washing machine - by taking into account effects of water jacket formation in spinning step of program |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1346094A4 (en) * | 2000-12-01 | 2004-03-24 | Lg Electronics Inc | Method for controlling spinning speed in drum-type washing machine |
| US7168118B2 (en) | 2000-12-01 | 2007-01-30 | Lg Electronics Inc. | Method for controlling spinning speed in drum-type washing machine |
| EP1346094A1 (en) * | 2000-12-01 | 2003-09-24 | Lg Electronics Inc. | Method for controlling spinning speed in drum-type washing machine |
| WO2004097099A1 (en) * | 2003-04-28 | 2004-11-11 | Emerson Electric Co. | Method and system for determining a washing machine load unbalance |
| US7591038B2 (en) | 2003-04-28 | 2009-09-22 | Emerson Electric Co., | Method and system for operating a clothes washing machine |
| US7905122B2 (en) | 2003-04-28 | 2011-03-15 | Nidec Motor Corporation | Method and system for determining a washing machine load unbalance |
| US8220092B2 (en) | 2003-06-12 | 2012-07-17 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Washing and rinsing method for a washing machine |
| WO2004111325A1 (en) * | 2003-06-12 | 2004-12-23 | BSH Bosch und Siemens Hausgeräte GmbH | Washing and rinsing method for a washing machine |
| WO2006124535A1 (en) * | 2005-05-12 | 2006-11-23 | Emerson Electric Co. | Method and system for operating a clothes washing machine |
| WO2007074037A1 (en) * | 2005-12-29 | 2007-07-05 | Arcelik Anonim Sirketi | A washing machine and a control method |
| WO2011042456A1 (en) * | 2009-10-07 | 2011-04-14 | BSH Bosch und Siemens Hausgeräte GmbH | Method for treating foam, correspondingly programmed control device and corresponding laundry treatment machine |
| EA021023B1 (en) * | 2009-10-07 | 2015-03-31 | Бсх Бош Унд Сименс Хаусгерете Гмбх | Method for treating foam in a washing or washing/drying machine and a machine therefor |
| WO2016156069A1 (en) * | 2015-04-01 | 2016-10-06 | BSH Hausgeräte GmbH | Method for operating a washing machine with foam detection by way of a motor current analysis and washing machine suitable therefor |
| CN114108232A (en) * | 2021-12-02 | 2022-03-01 | Tcl家用电器（合肥）有限公司 | Foam amount prediction method and device, storage medium and washing equipment |
| CN114108232B (en) * | 2021-12-02 | 2024-03-12 | Tcl家用电器（合肥）有限公司 | Foam amount prediction method, foam amount prediction device, storage medium, and washing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| PL306202A1 (en) | 1995-06-12 |
| KR100348768B1 (en) | 2002-12-11 |
| TR28684A (en) | 1997-01-02 |
| DE59408745D1 (en) | 1999-10-21 |
| DE4342274A1 (en) | 1995-06-14 |
| HRP940895B1 (en) | 2000-08-31 |
| HRP940895A2 (en) | 1996-10-31 |
| ES2138024T3 (en) | 2000-01-01 |
| PL176927B1 (en) | 1999-08-31 |
| EP0657576B1 (en) | 1999-09-15 |
| KR950018851A (en) | 1995-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0657576A1 (en) | Automatically controlled washing machine | |
| DE3638498C2 (en) | Program-controlled washing machine | |
| EP0618323A1 (en) | Washing machine with a reversible driven laundry drum | |
| DE102005057079A1 (en) | A method of controlling a spin drying process taking into account a diagonal imbalance in the spin dryer or the washing machine, and a spin dryer or a washing machine controlling the spin drying process therewith | |
| EP3268529B1 (en) | Method for operating a washing machine having an electrochemical sensor and washing machine suitable therefor | |
| DE19831617A1 (en) | Method for determining the amount of laundry in a drum washing machine | |
| DE19822717A1 (en) | Method and control device for determining the eccentricity in a drum washing machine | |
| DE3915345A1 (en) | RINSING DEVICE FOR AUTOMATIC WASHING MACHINES | |
| DE19610189C2 (en) | Spin process and spinner | |
| DE3840265C2 (en) | Program-controlled washing machine | |
| DE1953201B2 (en) | Drum washing machine | |
| DE102016212525A1 (en) | Laundry care device with a controller | |
| DE112005000188B4 (en) | Washing machine and control method for it | |
| EP0278239B1 (en) | Method for automatically washing laundry | |
| DE10327025B4 (en) | A method of controlling a dewatering process in a drum-type washing machine | |
| DE3445877C2 (en) | ||
| DE102009027933A1 (en) | Method for recognizing foam in tub of drum-type washing machine during main washing phase, involves evaluating temperature curves by continuous determination of gradients of temperature curves over preset time period | |
| EP1702096B2 (en) | Laundry treatment device comprising a control arrangement used to operate an electric motor | |
| EP0247995A1 (en) | Method and device to monitor the working of a washing machine | |
| DE3741791A1 (en) | Method for determining a laundry unbalance, especially in domestic washing machines | |
| DE60201391T2 (en) | A method of controlling the drum speed of a laundry washing machine during the spin cycle | |
| DE1008697B (en) | Washing machine for fully automatic execution of the washing program | |
| EP2785904B1 (en) | Method for operating a washing machine having an improved spin cycle | |
| EP0837173A1 (en) | Method for controlling the rinsing in a washing machine | |
| EP3623514B1 (en) | Method for operating a washing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE ES FR GB IT LI SE |
|
| 17P | Request for examination filed |
Effective date: 19951130 |
|
| 17Q | First examination report despatched |
Effective date: 19970306 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BSH BOSCH UND SIEMENS HAUSGERAETE GMBH |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE ES FR GB IT LI SE |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: ISLER & PEDRAZZINI AG |
|
| ET | Fr: translation filed | ||
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19990921 |
|
| REF | Corresponds to: |
Ref document number: 59408745 Country of ref document: DE Date of ref document: 19991021 |
|
| ITF | It: translation for a ep patent filed |
Owner name: STUDIO JAUMANN P. & C. S.N.C. |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2138024 Country of ref document: ES Kind code of ref document: T3 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PCAR Free format text: ISLER & PEDRAZZINI AG;POSTFACH 1772;8027 ZUERICH (CH) |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20081027 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20081027 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20081027 Year of fee payment: 15 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| EUG | Se: european patent has lapsed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091031 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091031 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20101031 Year of fee payment: 17 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20110307 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091101 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110304 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091101 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20121113 Year of fee payment: 19 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20121023 Year of fee payment: 19 Ref country code: IT Payment date: 20121023 Year of fee payment: 19 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130501 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59408745 Country of ref document: DE Effective date: 20130501 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20131031 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131031 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20140630 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131031 Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131031 |