EP0422423A2 - Drive motor control method in large domestic appliances, especially in washing machines and linen driers - Google Patents
Drive motor control method in large domestic appliances, especially in washing machines and linen driers Download PDFInfo
- Publication number
- EP0422423A2 EP0422423A2 EP90118065A EP90118065A EP0422423A2 EP 0422423 A2 EP0422423 A2 EP 0422423A2 EP 90118065 A EP90118065 A EP 90118065A EP 90118065 A EP90118065 A EP 90118065A EP 0422423 A2 EP0422423 A2 EP 0422423A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- revolutions
- drum
- washing
- drive motor
- operating time
- 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.)
- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/08—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
- D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2101/10—Spin 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
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/28—Electric heating
-
- 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
- D06F2105/58—Indications or alarms to the control system or to the user
Definitions
- the invention relates to a method for driving motor control in large household appliances, in particular in washing machines and tumble dryers according to the preamble of claim 1.
- the invention has for its object to provide a control method by means of which the laundry movement or laundry run-off time is optimized and, above all, reproducible values can be achieved.
- the basic idea of the method according to the invention is that the drive motor of the washing (or drying) drum during the washing and rinsing cycles (or during drying) is no longer timed via the program switch or via timers, but exactly according to a predetermined number of revolutions to be controlled, ie according to a number of revolutions setpoint specification (in the following only called setpoint specification).
- the required number of revolutions has been empirically determined by the manufacturer and coordinated with the most varied types of laundry, load quantities, etc.
- the speed of rotation (revolutions per minute) of the drum is determined by the user, freely selectable according to the type of laundry.
- a variable rotational speed is superimposed on the setpoint specification and, accordingly, corresponding program steps are completed or completed faster or slower, depending on the selected rotational speed.
- the setpoint is recorded in circular, rotary or central angles (based on a full revolution of 360 degrees).
- Another way of recording non-integer revolutions very precisely is to set a target value via tachoperiods.
- a tachogenerator is rigidly coupled to the drive shaft of the motor and emits a certain number of voltage pulses or tachoperiods per revolution. A fraction or multiple of these voltage pulses per revolution determines the specified number of drum revolutions.
- the setpoint is kept constant during the alkali heating phase.
- the caustic warm-up time until a specified temperature is reached depends on several factors such as fluctuations in the mains voltage, performance tolerance of the installed heating element, water inlet temperature, etc. That is, in other words: if the suds end temperature is not reached within the setpoint, heating continues when the drum is at a standstill. If, on the other hand, the suds end temperature is reached earlier, the laundry or drum is moved until the end of the setpoint specification; or: the laundry route is always constant or reproducible per program step and during an entire washing process.
- the user can now reach a predetermined device operating time or a total setpoint (total of all Washing drum revolutions during all washing, rinsing and reversing cycles carried out in the overall course of operation or the total sum of all drying drum revolutions) or after a specified total engine operating time, a visual indication in the form of a light indicator "service case" is transmitted.
- a visual indication in the form of a light indicator "service case" is transmitted.
- the condition of the carbon brushes must now be checked by customer service and replaced if necessary.
- the total sum of the setpoint values leading to an indication includes the motor running times during all the spin processes carried out.
- This predefined total comparison value is designed in such a way that the time-controlled spin cycles were also taken into account.
- this control method can also be used in dishwashers.
- the number of revolutions of the spray arm which is driven by a circulating pump can be sensed by sensors or in some other suitable manner.
- the circulation pump is switched off analogously, so that here, too, the number of revolutions of the spray arm is recorded precisely in each program step, kept constant and not determined by time control of the circulation pump.
- This method can be implemented by comparing software setpoints stored in the microprocessor with actual values.
- This microprocessor is part of a so-called electronic module in electronically speed-controlled, motor-driven large household appliances.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Antriebsmotor-Steuerung in Haushalt-Großgeräten, insbesondere bei Waschmaschinen und Wäschetrocknern nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for driving motor control in large household appliances, in particular in washing machines and tumble dryers according to the preamble of claim 1.
Am Markt befindliche Haushalt-Großgeräte mit motorischem Antrieb wie beispielsweise Waschmaschinen oder Wäschetrockner besitzen bekanntlich Programmschaltwerke, welche die einzelnen Arbeitsabläufe bzw. Programmschritte rein zeitlich begrenzt ansteuern. Diese zeitlich begrenzte Ansteuerung erfaßt u. a. auch die Laufzeit des Trommelantriebsmotors. D. h. mit anderen Worten: die Ein-Zeit des Antriebsmotors erfolgt zwar durch eine sehr genaue, aber ausschließlich zeitbegrenzte Sollwertvorgabe.Large household appliances with a motor drive on the market, such as washing machines or tumble dryers, are known to have program switching mechanisms which control the individual work processes or program steps purely for a limited time. This time-limited control detects u. a. also the running time of the drum drive motor. I.e. in other words: the on-time of the drive motor occurs through a very precise, but only time-limited setpoint specification.
Für Waschmaschinen bedeutet dies, daß während der mit reduzierter Trommelumdrehungsgeschwindigkeit durchgeführten Wasch- und Spülgänge die sogenannte Wäsche-Weglaufzeit (Gesamtdauer der Wäschehin- und -herbewegung, des Auflockerns oder ganz allgemein des Wäschefalls) von der Anzahl der durchgeführten Trommelumdrehungen pro Zeiteinheit (sprich: Programmschritt) abhängig ist. Aufgrund von Netzspannungs- und Beladungsschwankungen werden jedoch in ein und demselben Programmschritt nie die gleiche Anzahl von Trommelumdrehungen oder Reversierbewegungen durchgeführt, somit ist auch die Wäsche-Weglaufzeit von Waschvorgang zu Waschvorgang immer unterschiedlich bzw. nie gleich lang. Bei Wäschetrocknern trifft ähnliches zu.For washing machines, this means that during the washing and rinsing cycles carried out at a reduced drum rotation speed, the so-called laundry run-off time (total duration of the washing and moving movement, loosening or more generally the laundry fall) from the number of drum rotations performed per unit of time (i.e.: program step ) is dependent. Due to fluctuations in mains voltage and load, however, the same number of drum revolutions or will never be reached in the same program step Reversing movements carried out, so the wash run-off time from wash to wash is always different or never the same length. The same applies to tumble dryers.
Der Erfindung liegt die Aufgabe zugrunde ein Steuerungsverfahren zu schaffen, mit dessen Hilfe die Wäschebewegungs- oder Wäsche-Weglaufzeit optimiert wird und vor allem reproduzierbare Werte erzielbar sind.The invention has for its object to provide a control method by means of which the laundry movement or laundry run-off time is optimized and, above all, reproducible values can be achieved.
Diese Aufgabe, gemäß der Erfindung, wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen.This object, according to the invention, is achieved by the characterizing features of claim 1. Further advantageous embodiments of the invention can be found in the subclaims.
Die mit der Erfindung erzielbaren Vorteile liegen insbesondere darin, daß vornehmlich empfindliche Textilien, wie beispielsweise Wolle vor Schädigungen bewahrt wird, d. h. bei optimalen Wasch- und Trockenergebnissen wird deren schonendste Behandlung sichergestellt. Eine genaue Bestimmung bzw. Begrenzung der Trommellaufzeit ermöglicht dies.The advantages that can be achieved with the invention are, in particular, that primarily sensitive textiles, such as wool, are protected from damage, ie. H. with optimal washing and drying results, their gentlest treatment is ensured. This enables an exact determination or limitation of the drum running time.
Der Grundgedanke des erfindungsgemäßen Verfahrens liegt darin, den Antriebsmotor der Wäsche- (oder Trocken-) Trommel während der Wasch- und Spülgänge (bzw. beim Trocknen) nicht mehr zeitlich über das Programmschaltwerk bzw. über Zeitschaltuhren, sondern exakt gemäß einer vorgegebenen Anzahl von Umdrehungen anzusteuern, d. h. gemäß einer Umdrehungsanzahlsollwertvorgabe (im folgenden nur noch Soll-Wertvorgabe benannt). Die erforderliche Anzahl der Umdrehungen wurde herstellerseits empirisch ermittelt und auf die verschiedensten Wäschesorten, Beladungsmengen usw. abgestimmt. Zusätzlich zur Sollwertvorgabe ist die Umdrehungsgeschwindigkeit (Umdrehungen pro Minute) der Trommel vom Benutzer, entsprechend der Wäscheart, frei wählbar. D. h. der Sollwertvorgabe wird eine veränderbare Umdrehungsgeschwindigkeit überlagert und demzufolge entsprechende Programmschritte je nach angewählter Umdrehungsgeschwindigkeit rascher oder langsamer durchfahren bzw. abgeschlossen. Zur exakten Sollwertvorgabe nicht ganzzahliger Trommelumdrehungen erfolgt die Erfassung des Sollwerts in Kreis-, Dreh- oder Zentriwinkeln (unter Zugrundelegung einer vollen Umdrehung von 360 Winkelgraden). Eine weitere Art nicht ganzzahlige Umdrehungen sehr genau zu erfassen ist eine Sollwertvorgabe über Tachoperioden. Starr mit der Antriebswelle des Motors ist ein Tachogenerator gekoppelt, welcher pro Umdrehung eine ganz bestimmte Anzahl von Spannungsimpulsen oder Tachoperioden abgibt. Ein Bruchteil oder Vielfaches dieser Spannungsimpulse pro Umdrehung bestimmt die vorgegebene Anzahl der Trommelumdrehungen. Vornehmlich bei Wollprogrammen werden nicht ganzzahlige Bruchteile einer vollen Trommelumdrehung benötigt und mit Hilfe der vorgenannten Parameter äußerst genau erfaßt. In Waschmaschinen wird die Sollwertvorgabe während der Laugenaufheizphase konstant gehalten. Die Laugenaufheizzeit bis zum Erreichen einer vorgegebenen Temperatur ist von mehreren Faktoren wie Netzspannungsschwankungen, Leistungstoleranz des installierten Heizstabes, Wasserzulauftemperatur usw. abhängig. D. h. mit anderen Worten: wird die Laugenendtemperatur innerhalb der Sollwertvorgabe nicht erreicht, wird im Trommelstillstand weitergeheizt. Wird hingegen die Laugenendtemperatur früher erreicht, wird bis zum Ende der Sollwertvorgabe die Wäsche bzw. die Trommel weiter bewegt; oder: der Wäscheweg ist pro Programmschritt und während eines gesamten Waschvorgangs immer konstant bzw. reproduzierbar.
In vorteilhafter Weise kann nun dem Benutzer nach dem Erreichen einer vorab bestimmten Gerätebetriebsdauer oder einer Gesamt-Sollwertvorgabe (Gesamtsumme aller Wäschetrommelumdrehungen während aller im Gesamtbetriebsverlauf durchgeführten Wasch-, Spül- und Reversierzyklen oder die Gesamtsumme aller Trockentrommelumdrehungen) bzw. nach Ablauf einer vorgegebenen Motor-Gesamtbetriebszeit ein optischer Hinweis in Form einer Leuchtanzeige "Servicefall" übermittelt werden. Bei Geräten mit Kommutator-Motoren sind nun durch den Kundendienst der Zustand der Kohlebürsten zu kontrollieren und diese gegebenfalls zu erneuern. Ergänzend sei noch angefügt, daß bei Waschmaschinen die Gesamtsumme der zu einer Anzeige führenden Sollwertvorgabe die Motorlaufzeiten während aller durchgeführten Schleudervorgänge beinhaltet. Dieser vorgegebene Summenvergleichswert ist so ausgelegt, daß die zeitlich gesteuerten Schleudergänge mit berücksichtigt wurden. In abgewandelter Form ist dieses Steuerungsverfahren auch bei Geschirrspülmaschinen anwendbar. Die Anzahl der Umdrehungen des durch eine Umwälzpumpe strömungsmäßig angetriebenen Sprüharms kann sensoriell oder in anderer geeigneter Weise erfaßt werden. Ebenfalls nach Erreichen einer Sollwertvorgabe wird analog die Umwälzpumpe abgeschaltet so daß auch hier in jedem Programmschritt die Sprüharmumdrehungen zahlenmäßig genau erfaßt, konstantgehalten und nicht durch Zeitansteuerung der Umwälzpumpe bestimmt werden.The basic idea of the method according to the invention is that the drive motor of the washing (or drying) drum during the washing and rinsing cycles (or during drying) is no longer timed via the program switch or via timers, but exactly according to a predetermined number of revolutions to be controlled, ie according to a number of revolutions setpoint specification (in the following only called setpoint specification). The required number of revolutions has been empirically determined by the manufacturer and coordinated with the most varied types of laundry, load quantities, etc. In addition to the setpoint specification, the speed of rotation (revolutions per minute) of the drum is determined by the user, freely selectable according to the type of laundry. That is, A variable rotational speed is superimposed on the setpoint specification and, accordingly, corresponding program steps are completed or completed faster or slower, depending on the selected rotational speed. For exact setpoint specification of non-integer drum revolutions, the setpoint is recorded in circular, rotary or central angles (based on a full revolution of 360 degrees). Another way of recording non-integer revolutions very precisely is to set a target value via tachoperiods. A tachogenerator is rigidly coupled to the drive shaft of the motor and emits a certain number of voltage pulses or tachoperiods per revolution. A fraction or multiple of these voltage pulses per revolution determines the specified number of drum revolutions. In the case of wool programs in particular, non-integer fractions of a full drum revolution are required and are recorded extremely precisely with the aid of the aforementioned parameters. In washing machines, the setpoint is kept constant during the alkali heating phase. The caustic warm-up time until a specified temperature is reached depends on several factors such as fluctuations in the mains voltage, performance tolerance of the installed heating element, water inlet temperature, etc. That is, in other words: if the suds end temperature is not reached within the setpoint, heating continues when the drum is at a standstill. If, on the other hand, the suds end temperature is reached earlier, the laundry or drum is moved until the end of the setpoint specification; or: the laundry route is always constant or reproducible per program step and during an entire washing process.
In an advantageous manner, the user can now reach a predetermined device operating time or a total setpoint (total of all Washing drum revolutions during all washing, rinsing and reversing cycles carried out in the overall course of operation or the total sum of all drying drum revolutions) or after a specified total engine operating time, a visual indication in the form of a light indicator "service case" is transmitted. For devices with commutator motors, the condition of the carbon brushes must now be checked by customer service and replaced if necessary. In addition, it should also be added that in the case of washing machines, the total sum of the setpoint values leading to an indication includes the motor running times during all the spin processes carried out. This predefined total comparison value is designed in such a way that the time-controlled spin cycles were also taken into account. In a modified form, this control method can also be used in dishwashers. The number of revolutions of the spray arm which is driven by a circulating pump can be sensed by sensors or in some other suitable manner. Similarly, after a setpoint has been reached, the circulation pump is switched off analogously, so that here, too, the number of revolutions of the spray arm is recorded precisely in each program step, kept constant and not determined by time control of the circulation pump.
Realisierbar ist dieses Verfahren durch Vergleiche von softwaremäßig im Mikroprozessor abgespeicherten Sollwerten mit Istwerten. Dieser Mikroprozessor ist Bestandteil eines sogenannten Elektronikbausteins in elektronisch drehzahlgesteuerten, motorangetriebenen Haushalt-Großgeräten.This method can be implemented by comparing software setpoints stored in the microprocessor with actual values. This microprocessor is part of a so-called electronic module in electronically speed-controlled, motor-driven large household appliances.
Claims (11)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3933786A DE3933786A1 (en) | 1989-10-10 | 1989-10-10 | METHOD FOR DRIVE MOTOR CONTROL IN LARGE HOUSEHOLD APPLIANCES, ESPECIALLY IN WASHING MACHINES AND DRYERS |
DE3933786 | 1989-10-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0422423A2 true EP0422423A2 (en) | 1991-04-17 |
EP0422423A3 EP0422423A3 (en) | 1992-06-03 |
Family
ID=6391175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900118065 Withdrawn EP0422423A3 (en) | 1989-10-10 | 1990-09-20 | Drive motor control method in large domestic appliances, especially in washing machines and linen driers |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0422423A3 (en) |
DE (1) | DE3933786A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2384054A1 (en) * | 1977-03-15 | 1978-10-13 | Hotpoint Ltd | LAUNDRY WASHING MACHINE CONTROL DEVICE |
FR2384055A1 (en) * | 1977-03-15 | 1978-10-13 | Hotpoint Ltd | LAUNDRY WASHING MACHINE CONTROL DEVICE |
DE2818286A1 (en) * | 1977-08-18 | 1979-10-31 | Bauknecht Gmbh G | Monitoring system for the functioning of an appts. - sets time limits for transition between two measurable valves |
-
1989
- 1989-10-10 DE DE3933786A patent/DE3933786A1/en not_active Withdrawn
-
1990
- 1990-09-20 EP EP19900118065 patent/EP0422423A3/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2384054A1 (en) * | 1977-03-15 | 1978-10-13 | Hotpoint Ltd | LAUNDRY WASHING MACHINE CONTROL DEVICE |
FR2384055A1 (en) * | 1977-03-15 | 1978-10-13 | Hotpoint Ltd | LAUNDRY WASHING MACHINE CONTROL DEVICE |
DE2818286A1 (en) * | 1977-08-18 | 1979-10-31 | Bauknecht Gmbh G | Monitoring system for the functioning of an appts. - sets time limits for transition between two measurable valves |
Also Published As
Publication number | Publication date |
---|---|
DE3933786A1 (en) | 1991-04-18 |
EP0422423A3 (en) | 1992-06-03 |
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