EP1253233B1 - Method for controlling the washing program in a washing machine with a plastic tub - Google Patents
Method for controlling the washing program in a washing machine with a plastic tub Download PDFInfo
- Publication number
- EP1253233B1 EP1253233B1 EP02008560A EP02008560A EP1253233B1 EP 1253233 B1 EP1253233 B1 EP 1253233B1 EP 02008560 A EP02008560 A EP 02008560A EP 02008560 A EP02008560 A EP 02008560A EP 1253233 B1 EP1253233 B1 EP 1253233B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- washing
- temperature
- program
- liquid container
- washing machine
- 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.)
- Expired - Lifetime
Links
- 238000005406 washing Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 13
- 238000009987 spinning Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000013505 freshwater Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 13
- 239000002991 molded plastic Substances 0.000 claims 3
- 238000004904 shortening Methods 0.000 claims 2
- 230000000977 initiatory effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010412 laundry washing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/26—Casings; Tubs
- D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
- D06F37/262—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements made of plastic material, e.g. by injection moulding
-
- 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
- D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps
-
- 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
- D06F37/26—Casings; Tubs
- D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
-
- 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
- D06F2103/28—Air properties
- D06F2103/32—Temperature
-
- 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
Definitions
- the invention relates to a method for controlling the washing program of a washing machine with a manufactured in an injection molding plastic tub, with a rotatably mounted therein drum, which is driven by a motor with different washing and spin speeds, and with a control device for specifying the engine speeds and other program parameters. Moreover, the invention relates to a washing machine for carrying out such a method.
- washing tubs and washing dryers increasingly use plastic tubs.
- washing machines are known for example from DE 298 21 140 U1. It is also known to arrange for washing machines within the tub temperature sensors for controlling the wash liquor temperature
- JP 04285591 A Patent Abstracts of Japan
- a washing machine with a vertically rotatable drum within a container in which the drum is to be protected against deformation.
- the rotating drum used in this washing machine can be softened by the action of hot water, causing it to deform during spinning. This is prevented by stopping the spinning process when the water temperature or drum temperature is exceeded.
- JP 04117998 A Patent Abstracts of Japan
- a washing machine with a horizontally rotatable drum within a container in which the drum is to be protected from deformation.
- the rotating drum used in this washing machine can be softened by the action of hot water, causing it to deform during spinning. If the drum temperature is too high, the drum will be cooled by supplied air, slowly rotating the drum during cooling. After falling below the limit for the drum temperature of the spinning process is continued.
- US Pat. No. 5,394,582 discloses a method for heating laundry in a washing machine, in which a plurality of sensors for detecting the liquor temperature or the heater temperature are evaluated. Here, the laundry and heater is protected from overheating.
- Japanese Patent Application JP 2000279684 A discloses a washer-dryer with a drum rotating about a vertical axis, in which Ge Damage to the laundry during the drying process can be avoided.
- the heated air is adjusted to its temperature by a control unit so that a specified value is maintained.
- the low-priced materials used in plastic tubs allow only a limited load during spin, which, if exceeded, leads to permanent damage. This is especially true for mechanically heavily loaded areas, such as the back of the tub, in particular the transition from an injected bearing hub to the plastic or the connecting seam of two tub container halves.
- the operating limits depend on the one hand on material parameters and the tub geometry. An influence of these sizes by larger wall thicknesses or higher value plastic would lead to rising costs and other functional disadvantages, such.
- the invention thus raises the problem to disclose a method for controlling the washing program of a washing machine of the type mentioned, in which the restrictions imposed by the load limit of the tub material are minimized without changing the component geometry.
- the material temperature is primarily influenced by the temperature of the wash liquor, the ambient temperature, the program duration, the frequency of use, the drum heater warming, the amount of water and the material heating due to mechanical stress, and today because of the low level of contamination the laundry washing programs are carried out with ever lower time and lye temperature specifications by the user, only extreme conditions (high material temperature and simultaneous high mechanical load) must be prevented.
- a washing machine for carrying out the method according to the invention has a plastic tub produced in an injection molding process.
- a drum for receiving laundry is rotatably mounted and is driven by a motor with different washing and spinning speeds.
- the washing machine has a control device for specifying the engine speeds and other program parameters.
- Such a washing machine is known for example from the aforementioned DE 298 21 140 U1 and therefore not shown by drawings or described in more detail.
- Proposed is a direct or indirect temperature monitoring of particularly contaminated points of a plastic tub to reduce the occurrence of critical conditions (excessive material temperatures), the load or the temperature and thus to protect the tub. This can basically be done in two ways:
- the particularly stressed and endangered points of a plastic tote container are determined.
- a temperature-measuring sensor is mounted whose signal is detected and evaluated by a measuring and control unit.
- changes are made in the washing process which leave the component temperature within the permissible range. Variations of this type may include speed reduction, program shortening, wash redistribution, fresh water feed, liquor temperature limit, and the like. ⁇ ., Which then leads simultaneously to a lower temperature or a lower temperature rise rate.
- One or more sensors can also be placed elsewhere in the tub if the measurements allow reliable conclusions about the temperatures at the critical points.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Steuerung des Waschprogramms einer Waschmaschine mit einem in einem Spritzgussverfahren hergestellten Kunststoff-Laugenbehälter, mit einer darin drehbar gelagerten Trommel, die durch einen Motor mit verschiedenen Wasch- und Schleuderdrehzahlen angetrieben wird, und mit einer Steuereinrichtung zur Vorgabe der Motordrehzahlen und anderer Programmparameter. Darüber hinaus betrifft die Erfindung eine Waschmaschine zur Durchführung eines solchen Verfahrens.The invention relates to a method for controlling the washing program of a washing machine with a manufactured in an injection molding plastic tub, with a rotatably mounted therein drum, which is driven by a motor with different washing and spin speeds, and with a control device for specifying the engine speeds and other program parameters. Moreover, the invention relates to a washing machine for carrying out such a method.
Aus Kostengründen werden in Waschmaschinen und Waschtrocknern zunehmend Laugenbehälter aus Kunststoff eingesetzt. Solche Waschmaschinen sind beispielsweise aus der DE 298 21 140 U1 bekannt. Es ist weiterhin bekannt, bei Waschmaschinen innerhalb des Laugenbehälters Temperatursensoren zur Regelung der Waschlaugentemperatur anzuordnenFor reasons of cost, washing tubs and washing dryers increasingly use plastic tubs. Such washing machines are known for example from DE 298 21 140 U1. It is also known to arrange for washing machines within the tub temperature sensors for controlling the wash liquor temperature
Aus der JP 04285591 A (Patent Abstracts of Japan) ist eine Waschmaschine mit einer vertikal drehbaren Trommel innerhalb eines Behälters bekannt, bei der die Trommel vor Verformungen geschützt werden soll. Die in dieser Waschmaschine verwendete rotierende Trommel kann durch die Einwirkung von heißem Wasser weich werden, wodurch sie sich beim Schleudern verformen kann. Dies wird dadurch verhindert, dass bei einer Überschreitung der Wassertemperatur oder Trommeltemperatur der Schleuderprozess gestoppt wird.From JP 04285591 A (Patent Abstracts of Japan) a washing machine with a vertically rotatable drum within a container is known, in which the drum is to be protected against deformation. The rotating drum used in this washing machine can be softened by the action of hot water, causing it to deform during spinning. This is prevented by stopping the spinning process when the water temperature or drum temperature is exceeded.
Aus der JP 04117998 A (Patent Abstracts of Japan) ist eine Waschmaschine mit einer horizontal drehbaren Trommel innerhalb eines Behälters bekannt, bei der die Trommel vor Verformungen geschützt werden soll. Die in dieser Waschmaschine verwendete rotierende Trommel kann durch die Einwirkung von heißem Wasser weich werden, wodurch sie sich beim Schleudern verformen kann. Bei einer zu hohen Trommeltemperatur wird die Trommel durch zugeführte Gebläseluft gekühlt, wobei die Trommel während der Kühlung langsam gedreht wird. Nach Unterschreiten des Grenzwertes für die Trommeltemperatur wird der Schleudervorgang fortgesetzt.From JP 04117998 A (Patent Abstracts of Japan), a washing machine with a horizontally rotatable drum within a container is known, in which the drum is to be protected from deformation. The rotating drum used in this washing machine can be softened by the action of hot water, causing it to deform during spinning. If the drum temperature is too high, the drum will be cooled by supplied air, slowly rotating the drum during cooling. After falling below the limit for the drum temperature of the spinning process is continued.
Aus der Patentschrift US 5,394,582 ist ein Verfahren zum Erwärmen von Wäsche in einer Waschmaschine bekannt, in der eine Vielzahl von Sensoren zur Erfassung der Laugentemperatur oder der Heizeinrichtungstemperatur ausgewertet werden. Hierbei wird die Wäsche und Heizeinrichtung vor Überhitzung geschützt.US Pat. No. 5,394,582 discloses a method for heating laundry in a washing machine, in which a plurality of sensors for detecting the liquor temperature or the heater temperature are evaluated. Here, the laundry and heater is protected from overheating.
Aus der japanischen Offenlegungsschrift JP 2000279684 A (Patent Abstracts of Japan) ist ein Waschtrockner mit einer um eine vertikale Achse drehenden Trommel bekannt, bei dem Ge webeschäden der Wäsche während des Trockenvorgangs vermieden werden. Hierbei wird die erhitzte Luft auf ihre Temperatur von einer Steuerungseinheit derart eingestellt, dass ein spezifizierter Wert eingehalten wird.Japanese Patent Application JP 2000279684 A (Patent Abstracts of Japan) discloses a washer-dryer with a drum rotating about a vertical axis, in which Ge Damage to the laundry during the drying process can be avoided. Here, the heated air is adjusted to its temperature by a control unit so that a specified value is maintained.
Die bei Kunststoff-Laugenbehältern eingesetzten preisgünstigen Werkstoffe lassen nur eine begrenzte Belastung beim Schleudern zu, bei deren Überschreitung es zu dauerhaften Schäden kommt. Dies gilt insbesondere für mechanisch stark belastete Stellen, wie die Rückseite des Laugenbehälters, insbesondere der Übergang von einer eingespritzten Lagernabe zum Kunststoff oder die Verbindungsnaht zweier Laugenbehälterhälften. Die Betriebsgrenzwerte hängen einerseits von Werkstoffparametern und der Laugenbehältergeometrie ab. Eine Beeinflussung dieser Größen durch größere Wandstärken oder höherwertigen Kunststoff würde zu steigenden Kosten und anderen Funktionsnachteilen führen, wie z. B. geringere freie Schwingwege und eine damit verbundene geringere Unwuchtaufnahme, größere Energieaufnahme u. ä.The low-priced materials used in plastic tubs allow only a limited load during spin, which, if exceeded, leads to permanent damage. This is especially true for mechanically heavily loaded areas, such as the back of the tub, in particular the transition from an injected bearing hub to the plastic or the connecting seam of two tub container halves. The operating limits depend on the one hand on material parameters and the tub geometry. An influence of these sizes by larger wall thicknesses or higher value plastic would lead to rising costs and other functional disadvantages, such. B. lower free vibration paths and an associated lower imbalance, greater energy consumption u. ä.
Zum anderen hängen die Betriebsgrenzwerte direkt von den in den Laugenbehälter eingeleiteten Kräften ab. Eine Möglichkeit, diese zu reduzieren, ist beispielsweise eine Unwuchtüberwachung, die hohe Schleuderdrehzahlen nur bei kleinsten Unwuchten erlaubt. Dies führt in der Praxis zu deutlichen Einschränkungen im Gebrauchsnutzen.On the other hand, the operating limits depend directly on the forces introduced into the tub. One way to reduce this, for example, an imbalance monitoring that allows high spin speeds only the smallest imbalance. This leads in practice to significant limitations in utility.
Der Erfindung stellt sich somit das Problem, ein Verfahren zur Steuerung des Waschprogramms einer Waschmaschine der eingangs genannten Art zu offenbaren, bei welchem die durch die Belastungsgrenze des Laugenbehälter-Werkstoffs vorgegebenen Einschränkungen ohne Änderung der Bauteilgeometrie minimiert werden.The invention thus raises the problem to disclose a method for controlling the washing program of a washing machine of the type mentioned, in which the restrictions imposed by the load limit of the tub material are minimized without changing the component geometry.
Erfindungsgemäß wird dieses Problem durch ein Verfahren mit den Merkmalen der unabhängigen Patentansprüche 1 und 4 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen des Verfahrens nach Anspruch 1 ergeben sich aus dem nachfolgenden Unteranspruch 2. Ein weiterer Anspruch 3 offenbart eine Waschmaschine, die zur Durchführung eines Verfahrens nach den Ansprüchen 1 oder 2 geeignet ist.According to the invention, this problem is solved by a method having the features of independent claims 1 and 4. Advantageous embodiments and developments of the method according to claim 1 emerge from the following dependent claim 2. Another claim 3 discloses a washing machine, which is suitable for carrying out a method according to claims 1 or 2.
Die mit der Erfindung erreichbaren Vorteile resultieren aus der Erkenntnis, dass die Temperatur eines Kunststoff-Laugenbehälters als weitere wichtige Einflussgröße in die Belastungsgrenzen des Werkstoffs eingeht. Da die Werkstofftemperatur bei gegebenen Geometrie- und Werk - stoffparametern in erster Linie von der Temperatur der Waschlauge, der Umgebungstemperatur, der Programmdauer, der Nutzungshäufigkeit, der Trommellagererwärmung, der Wassermenge und der Werkstofferwärmung durch mechanische Beanspruchung beeinflusst wird, und da heute aufgrund der geringen Verschmutzung der Wäsche die Waschprogramme mit immer geringeren Zeit- und Laugentemperaturvorgaben seitens des Benutzers durchgeführt werden, müssen lediglich Extrembedingungen (hohe Werkstofftemperatur und gleichzeitige hohe mechanische Belastung) verhindert werden. Da diese nur in seltenen Fällen auftreten, können durch Einsatz eines der erfindungsgemäß gestalteten Verfahren oder durch eine Kombination davon auch bei Waschmaschinen mit Kunststoff-Laugenbehältern aus vergleichsweise preisgünstigem Werkstoff Waschprogramme mit hohen Drehzahlen und ausreichenden Unwuchten realisiert werden, ohne dass die Gefahr der Beschädigung und der Beschränkung im normalen Nutzen besteht oder entsprechend konstruktive Maßnahmen wie Verstärkungen oder Werkstoffveränderungen notwendig wären.The advantages achievable with the invention result from the knowledge that the temperature of a plastic tub enters into the load limits of the material as a further important influencing variable. Given the given geometry and material parameters, the material temperature is primarily influenced by the temperature of the wash liquor, the ambient temperature, the program duration, the frequency of use, the drum heater warming, the amount of water and the material heating due to mechanical stress, and today because of the low level of contamination the laundry washing programs are carried out with ever lower time and lye temperature specifications by the user, only extreme conditions (high material temperature and simultaneous high mechanical load) must be prevented. Since these occur only in rare cases, by using one of the inventively designed methods or by a combination of washing machines with plastic tubs from relatively inexpensive material wash programs can be realized with high speeds and sufficient imbalances without the risk of damage and the Restriction in normal use or appropriate constructive measures such as reinforcements or material changes would be necessary.
Ein Ausführungsbeispiel der Erfindung ist im Folgenden näher beschrieben. Eine Waschmaschine zur Durchführung des erfindungsgemäßen Verfahrens besitzt einen in einem Spritzgussverfahren hergestellten Kunststoff-Laugenbehälter. In diesem ist eine Trommel zur Aufnahme von Wäsche drehbar gelagert und wird durch einen Motor mit verschiedenen Wasch- und Schleuderdrehzahlen angetrieben. Die Waschmaschine besitzt eine Steuereinrichtung zur Vorgabe der Motordrehzahlen und anderer Programmparameter. Eine solche Waschmaschine ist beispielsweise aus der eingangs erwähnten DE 298 21 140 U1 bekannt und deshalb nicht durch Zeichnungen dargestellt oder ausführlicher beschrieben.An embodiment of the invention is described in more detail below. A washing machine for carrying out the method according to the invention has a plastic tub produced in an injection molding process. In this a drum for receiving laundry is rotatably mounted and is driven by a motor with different washing and spinning speeds. The washing machine has a control device for specifying the engine speeds and other program parameters. Such a washing machine is known for example from the aforementioned DE 298 21 140 U1 and therefore not shown by drawings or described in more detail.
Vorgeschlagen wird eine direkte oder indirekte Temperatur-Überwachung besonders belasteter Stellen eines Kunststofflaugenbehälters, um beim Auftreten kritischer Zustände (zu hohe Material- Temperaturen) die Belastung oder die Temperatur zu reduzieren und damit den Laugenbehälter zu schützen. Dies kann grundsätzlich auf zwei Wegen erfolgen:Proposed is a direct or indirect temperature monitoring of particularly contaminated points of a plastic tub to reduce the occurrence of critical conditions (excessive material temperatures), the load or the temperature and thus to protect the tub. This can basically be done in two ways:
Durch Berechnung oder Versuche werden die besonders belasteten und gefährdeten Stellen eines Kunststofflaugenbehälters ermittelt. An einer oder mehrerer dieser Stellen wird ein temperaturmessender Sensor angebracht, dessen Signal von einer Mess- und Steuereinheit erfasst und ausgewertet wird. In Abhängigkeit der in einem Rechner hinterlegten Grenzwerte und der Prozesswerte Unwucht, Drehzahl und Schleuderzeit werden Veränderungen im Waschprozess vorgenommen, die die Bauteiltemperatur im zulässigen Bereich belassen. Veränderungen dieser Art können Drehzahlreduzierung, Programmverkürzungen, Wäscheneuverteilungen, Frischwasserzulauf, Laugentemperaturbegrenzung u. ä. sein, was dann gleichzeitig zu einer geringeren Temperatur oder einer geringeren Temperatur-Anstiegsgeschwindigkeit führt.By calculation or tests, the particularly stressed and endangered points of a plastic tote container are determined. At one or more of these points, a temperature-measuring sensor is mounted whose signal is detected and evaluated by a measuring and control unit. Depending on the limit values stored in a computer and the process values unbalance, speed and spin time, changes are made in the washing process which leave the component temperature within the permissible range. Variations of this type may include speed reduction, program shortening, wash redistribution, fresh water feed, liquor temperature limit, and the like. Ä., Which then leads simultaneously to a lower temperature or a lower temperature rise rate.
Ein oder mehrere Sensoren können auch an anderer Stelle des Laugenbehälters platziert werden, wenn die Messungen dort verlässliche Rückschlüsse auf die Temperaturen an den kritischen Stellen zulassen.One or more sensors can also be placed elsewhere in the tub if the measurements allow reliable conclusions about the temperatures at the critical points.
Es ist auch möglich, aus den Daten des Waschprozesses (Drehzahl, Wassermenge, Beladung, Zeit, Temperatur etc.), der Umgebungstemperatur, den Werkstoffdaten und der Bauteilgeometrie mit im Waschautomat vorhandenen Sensoren (Laugentemperatur-Sensor, Beladungssensor usw.) eine Hochrechnung der Temperatur an kritischen Stellen des Laugenbehälters vorzunehmen und dann Reaktionen wie vorbeschrieben vorzunehmen.It is also possible, from the data of the washing process (speed, amount of water, load, time, temperature, etc.), the ambient temperature, the material data and the component geometry with existing sensors in the washing machine (lye temperature sensor, load sensor, etc.), a projection of the temperature at critical points of the tub and then perform reactions as described above.
Auch die Kombination aus direkter und indirekter Temperaturmessung ist sinnvoll, um im Versagungsfall eines Systems ausreichende Sicherheit zu haben.The combination of direct and indirect temperature measurement makes sense, in order to have sufficient security in case of failure of a system.
Weiter wird vorgeschlagen, bei Einsatz eines oder mehrerer Sensoren eine ständige Prüfung der Funktion der Sensoren vorzunehmen, indem vor Beginn eines neuen Waschprogramms nach ausreichend langer Stillstandzeit die Temperaturmessung mit den zusätzlichen Sensoren und dem im Waschprozess eingesetzten Laugentemperatur-Sensor erfolgt und verglichen wird.It is also proposed, when using one or more sensors, to carry out a continuous testing of the function of the sensors by measuring and comparing the temperature with the additional sensors and the liquor temperature sensor used in the washing process before starting a new washing program after a sufficiently long downtime.
Claims (4)
- Method for controlling the washing program of a washing machine which has an injection-moulded plastic washing-liquid container with a drum which is rotatably mounted therein and driven by a motor at different washing and spinning speeds, said washing machine also having a control device for presetting the motor speeds and other program parameters,
characterised in that
for mechanically severely loaded points of the washing-liquid container, the control device determines a temperature load value through direct temperature measurement by means of sensors arranged on or inside the wall of the washing-liquid container, and, if a predetermined threshold value is exceeded, carries out at last one load-reducing measure, such as reducing the spin speed, shortening the program running time, cooling by supplying fresh water, limiting the temperature of the washing liquid or reducing the imbalance thresholds or redistributing the washing in the spinning program section. - Method for controlling the washing program of a washing machine according to claim 1, wherein at least one additional temperature sensor is arranged in the washing-liquid container for monitoring the liquid located in the washing-liquid container (washing-liquid temperature sensor),
characterised in that
at the beginning of a washing program, the control device carries out a check of the sensors by comparing their measured values with the measured values of the additional temperature sensor. - Washing machine which has an injection-moulded plastic washing-liquid container with a drum which is rotatably mounted therein and driven by a motor at different washing and spinning speeds, said washing machine also having a control device for presetting the motor speeds and other program parameters for accomplishing the method according to claim 1 or 2,
characterised in that
at a mechanically severely loaded point of the washing-liquid container is arranged at least one sensor for monitoring its temperature, via which the control device determines a temperature load value for the mechanically severely loaded points and carries out a load-reducing measure if a predetermined threshold value is exceeded. - Method for controlling the washing program of a washing machine which has an injection-moulded plastic washing-liquid container with a drum which is rotatably mounted therein and driven by a motor at different washing and spinning speeds, said washing machine also having a control device for presetting the motor speeds and other program parameters,
characterised in that
the control device determines a temperature load value for mechanically severely loaded points of the washing-liquid container by computing from the data of the washing process, the ambient temperature, the material data and the component geometry using sensors which are present in the automatic washing machine, and, if a predetermined threshold value is exceeded, carries out at least one load-reducing measure such as reducing the spin speed, shortening the program running time, cooling by supplying fresh water, limiting the temperature of the washing liquid or reducing the imbalance thresholds or redistributing the washing in the spinning program section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10120199 | 2001-04-24 | ||
| DE10120199A DE10120199B4 (en) | 2001-04-24 | 2001-04-24 | Method for controlling the washing program of a washing machine with a plastic tub |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1253233A2 EP1253233A2 (en) | 2002-10-30 |
| EP1253233A3 EP1253233A3 (en) | 2003-10-15 |
| EP1253233B1 true EP1253233B1 (en) | 2006-05-10 |
Family
ID=7682632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02008560A Expired - Lifetime EP1253233B1 (en) | 2001-04-24 | 2002-04-16 | Method for controlling the washing program in a washing machine with a plastic tub |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1253233B1 (en) |
| AT (1) | ATE325915T1 (en) |
| DE (2) | DE10120199B4 (en) |
| ES (1) | ES2259349T3 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008051946A1 (en) * | 2008-10-16 | 2010-04-22 | Aksys Gmbh | Method for manufacturing plastic molded component, involves guiding open mold, particularly by transport device, and inserting supporting body for positioning or fixing insert or inserts |
| DE102010062924A1 (en) * | 2010-12-13 | 2012-06-14 | BSH Bosch und Siemens Hausgeräte GmbH | Household appliance i.e. washing machine, has control device for executing operating program and established to determine endangerment degree of shaft and bearing based on variable data of sensors and clock of appliance |
| DE102010063134B4 (en) * | 2010-12-15 | 2024-01-04 | BSH Hausgeräte GmbH | Method for operating a household appliance and household appliance |
| DE102014220350A1 (en) * | 2014-10-08 | 2016-04-14 | BSH Hausgeräte GmbH | Laundry care device |
| DE102015107689A1 (en) * | 2015-05-18 | 2016-11-24 | Miele & Cie. Kg | Method for controlling a speed of a washing drum of a washing machine, control unit and washing machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04117998A (en) * | 1990-09-07 | 1992-04-17 | Sanyo Electric Co Ltd | Washing machine |
| JPH04285591A (en) * | 1991-03-13 | 1992-10-09 | Toshiba Corp | Washing machine with centrifugal function |
| KR930008226A (en) * | 1991-10-19 | 1993-05-21 | 강진구 | Boiler Washer Safety Device |
| IT245289Y1 (en) * | 1998-01-20 | 2002-03-20 | Electrolux Zanussi Elettrodome | PERFECTED PLASTIC TANK FOR WASHING MACHINE AND SIMILAR |
| JP2000279684A (en) * | 1999-03-31 | 2000-10-10 | Nippon Kentetsu Co Ltd | Operation control of washing-drying machine |
| DE10116127A1 (en) * | 2001-03-30 | 2002-10-24 | Aeg Hausgeraete Gmbh | Method for operating a household appliance |
-
2001
- 2001-04-24 DE DE10120199A patent/DE10120199B4/en not_active Expired - Fee Related
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2002
- 2002-04-16 ES ES02008560T patent/ES2259349T3/en not_active Expired - Lifetime
- 2002-04-16 EP EP02008560A patent/EP1253233B1/en not_active Expired - Lifetime
- 2002-04-16 AT AT02008560T patent/ATE325915T1/en not_active IP Right Cessation
- 2002-04-16 DE DE50206721T patent/DE50206721D1/en not_active Expired - Lifetime
Also Published As
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|---|---|
| ATE325915T1 (en) | 2006-06-15 |
| ES2259349T3 (en) | 2006-10-01 |
| EP1253233A3 (en) | 2003-10-15 |
| DE50206721D1 (en) | 2006-06-14 |
| DE10120199B4 (en) | 2005-11-03 |
| DE10120199A1 (en) | 2002-11-14 |
| EP1253233A2 (en) | 2002-10-30 |
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