EP2376696B1 - Waschmaschine mit sicherheitsbezogener geschwindigkeitskontrolle - Google Patents

Waschmaschine mit sicherheitsbezogener geschwindigkeitskontrolle Download PDF

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Publication number
EP2376696B1
EP2376696B1 EP09797019A EP09797019A EP2376696B1 EP 2376696 B1 EP2376696 B1 EP 2376696B1 EP 09797019 A EP09797019 A EP 09797019A EP 09797019 A EP09797019 A EP 09797019A EP 2376696 B1 EP2376696 B1 EP 2376696B1
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EP
European Patent Office
Prior art keywords
speed
vmax
maximum speed
safety module
safety
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Application number
EP09797019A
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English (en)
French (fr)
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EP2376696A1 (de
Inventor
Mehtap Gencer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arcelik AS
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Arcelik AS
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Publication of EP2376696A1 publication Critical patent/EP2376696A1/de
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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
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/76—Preventing or reducing imbalance or noise
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/26—Imbalance; Noise level

Definitions

  • the present invention relates to a washing machine wherein the speed control is performed according to the unbalanced load amount.
  • Washing machines comprise a drum wherein laundry is disposed, a motor providing the drum to rotate, a pump providing water to be delivered to the drum, a heater providing the water to be heated, and a control unit which arranges the operations of the elements such as motor, pump and heater according to the washing programs installed in its memory.
  • the control unit also, provides the unbalanced load amount occurring in the drum to be detected and the speed control of the drum to be performed according to this data.
  • the control unit is divided into two parts being safety module and algorithm module.
  • Critical processes in terms of user safety such as unbalanced load detection and whether the elements operate properly or not are performed in the safety module.
  • the algorithm module processes, which relate mainly to performing the washing programs such as the target speed the drum is required to reach and the required temperature of the water, are performed. While the speed data is received from the algorithm module when the speed the drum can reach according to the unbalanced load amount is desired to be controlled, the safety cannot be provided if a wrong data is received from the algorithm module due to an error that occurs in the algorithm module.
  • the aim of the present invention is the realization of a washing machine wherein the speed control is provided in a safe manner.
  • the unbalanced load amount is detected and the maximum speed that can be reached according to the unbalanced load amount is calculated.
  • the algorithm module provides the drum to reach a target speed which is required by the program stored in the memory of the algorithm module. Testing the speed of the drum and comparing it with the maximum speed are performed in the safety module since they relate to safety.
  • the speed of the drum is measured in the safety module and compared with the determined maximum speed. If the speed is greater than the maximum speed, the motor is stopped by detecting that there is an error in the algorithm module, in the control unit or in the motor.
  • the speed, measured in the safety module is compared with the absolute surplus of the determined maximum speed in a certain ratio, and the error condition is controlled. If the speed, which is measured while the drum accelerates in the manner the program requires, exceeds the determined maximum speed more than a certain ratio, and if the speed, which is measured while the drum decelerates, is greater than the determined ratio, the motor is stopped by concluding that there is an error.
  • the safety module when the maximum speed is exceeded, stops the motor but does not turn off the machine. After stopping the motor, the safety module waits for a certain period of time and then provides the program to be resumed. If the maximum speed is exceeded again while the same program continues, the safety module again stops the motor but does not turn off the machine. Preferred embodiments are claimed in dependent claims 2 to 4.
  • the safety module terminates the program and turns off the machine.
  • the safety module obliges the user to call for maintenance and thus, provides the error to be detected and corrected.
  • the speed control is performed in a safe manner.
  • the processes of the control unit are divided such that the program steps will be in the algorithm module and the control of the safety will be in the safety module, and the data that can create a safety risk are not received to the safety module and thus, speed control is provided.
  • Figure 1 - is the schematic view of a washing machine.
  • a washing machine (1) comprises a body, a drum (2) wherein the laundry to be washed is disposed and which provides washing and spin-drying by rotating around an axis, a motor (3) which provides the drum (2) to be activated, and a control unit (6) that has
  • the tests that perform the error detection of the elements such as door and pump, the error-free operations of which are required in terms of safety, are performed in the safety module (5) compatibly with the safety standard.
  • the algorithm module (4) programs that are not critical in terms of safety are installed and the operation of the program steps is controlled.
  • control unit (6) furthermore, comprises
  • controlling the drum (2) spin-drying speed (V), performed at high speeds is important.
  • Vmax the maximum speed according to the unbalanced load (Dy) amount
  • the spin-drying is allowed to be performed at a high speed (revolution) when the amount of the unbalanced load (Dy) in the drum (2) is small and the spin-drying is allowed to be performed at a low speed (revolution) when the amount of the unbalanced load (Dy) in the drum (2) is large.
  • the drum (2) is allowed to reach the target speed (Vh), which is stored in the algorithm module (4), only if the target speed (Vh) is smaller than the maximum speed (Vmax) which is determined for the unbalanced load (Dy) amount.
  • control unit (6) of the washing machine (1) as well as detecting the unbalanced load (Dy) amount, also controlling the speed (V) adjusted according to the unbalanced load (Dy) amount is a requirement for providing safety and is performed in the safety module (5).
  • the algorithm module (4) it is checked whether the target amount (Vh) required by the performed program can be reached, and again in the safety module (5), it is controlled whether the reached speed (V) exceeds the maximum speed (Vmax), determined in the safety module (5), or not, that is, whether there is an error or not.
  • the reached speed (V) is tested also in the safety module (5), no data is transmitted to the safety module (5) from the algorithm module (4) and thus, the safety is improved.
  • the programs installed by the producer are provided to be performed and therefore, some data are received from the safety module (5). While different programs are added to the algorithm module (4) for different models of washing machines (1), no change is made in the safety module (5) and thus, with the same safety module (5), different models of washing machines (1) compatible with the safety standard can be produced.
  • the safety module (5) stops the motor (3) by detecting that there is an error.
  • the error can occur due to conditions such as short-circuiting of a switch that provides the motor (3) to be driven, determining erroneous target speed (Vh) in the algorithm module (4), and faults occurring in the software, all of which cause the motor (3) to accelerate in an uncontrolled manner.
  • the safety module (5) stops the motor (3) by detecting that there is an error. Since the absolute increase lVmax + ⁇
  • the safety module (5) stops the motor (3) for a while by determining that there is an error and then provides the program to be resumed, and when the number of successive error detections exceeds the determined amount, the safety module (5) terminates the program and transmits an error message to the user.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (4)

  1. Waschmaschine (1), umfassend einen Gehäusekörper, eine Trommel (2), in die die zu waschende Wäsche gelegt wird und die durch Drehen um eine Achse Waschen und Schleudertrocknen vorsieht, einen Motor (3), der das Aktivieren der Trommel (2) vorsieht, und eine Steuereinheit (6), dadurch gekennzeichnet, dass die Steuereinheit (6) Folgendes aufweist:
    - ein Sicherheitsmodul (5), in dem die Daten im Zusammenhang mit der Sicherheit wie etwa Erkennung von unausgeglichener Beladung und Erkennung von abnormalen Zuständen gesteuert werden, und
    - ein Algorithmusmodul (4), in dem die Wasch-, Spül- und Schleudertrocknungsschritte und ihre jeweilige Dauer gesteuert werden,
    - wobei das Sicherheitsmodul (5) im Verlaufe des Waschprogramms die Geschwindigkeit (V) der Trommel (2) misst, die Menge der unausgeglichenen Beladung (Dy) und die maximale Geschwindigkeit (Vmax) berechnet, die die Trommel (2) entsprechend der Menge der unausgeglichenen Beladung (Dy) erreichen kann, die gemessene Geschwindigkeit (V) mit der maximalen Geschwindigkeit (Vmax) vergleicht und erkennt, dass ein Fehler vorliegt, wenn die Geschwindigkeit (V) höher als die maximale Geschwindigkeit (Vmax) ist und wobei
    - das Algorithmusmodul (4), in dem eine Zielgeschwindigkeit (Vh), die das Waschprogramm benötigt, für die einzelnen Waschprogramme gespeichert ist, und an das die Daten zur maximalen Geschwindigkeit (Vmax) vom Sicherheitsmodul (5) übertragen werden, die maximale Geschwindigkeit (Vmax) mit der Zielgeschwindigkeit (Vh) vergleicht, die zu dem ausgeführten Waschprogramm gehört, und vorsieht, dass die Zielgeschwindigkeit (Vh) erreicht wird, wenn die Zielgeschwindigkeit (Vh) geringer als die maximale Geschwindigkeit (Vmax) ist, und vorsieht, dass die maximale Geschwindigkeit (Vmax) erreicht wird, wenn die Zielgeschwindigkeit (Vh) höher als die maximale Geschwindigkeit (Vmax) ist.
  2. Waschmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Steuereinheit (6) ein Sicherheitsmodul (5) aufweist, das den Motor (3) anhält, indem es erkennt, dass ein Fehler vorliegt, wenn die gemessene Geschwindigkeit (V) höher als die bestimmte maximale Geschwindigkeit (Vmax) ist.
  3. Waschmaschine (1) nach einem der vorangehenden Ansprüche" dadurch gekennzeichnet, dass die Steuereinheit (6) ein Sicherheitsmodul (5) aufweist, das den Motor (3) vorübergehend anhält, indem es bestimmt, dass ein Fehler vorliegt, wenn die vom Sicherheitsmodul (5) gemessene Geschwindigkeit (V) höher als die maximale Geschwindigkeit (Vmax) ist, und das dann eine Wiederaufnahme des Programms vorsieht, und das das Programm abbricht und eine Fehlermeldung an den Benutzer übermittelt, wenn die Anzahl aufeinanderfolgender Fehlererkennungen die bestimmte Menge übersteigt.
  4. Waschmaschine (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Steuereinheit (6) ein Sicherheitsmodul (5) aufweist, das den Motor (3) anhält, indem es erkennt, dass ein Fehler vorliegt, wenn die Geschwindigkeit (V) absolut höher als die Geschwindigkeit |Vmax + λ| ist, die um eine bestimmte Größe (λ) höher ist als die maximale Geschwindigkeit (Vmax).
EP09797019A 2008-12-31 2009-12-15 Waschmaschine mit sicherheitsbezogener geschwindigkeitskontrolle Active EP2376696B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200810087 2008-12-31
PCT/EP2009/067231 WO2010076203A1 (en) 2008-12-31 2009-12-15 A washing machine wherein safe speed control is performed

Publications (2)

Publication Number Publication Date
EP2376696A1 EP2376696A1 (de) 2011-10-19
EP2376696B1 true EP2376696B1 (de) 2012-08-15

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ID=42101832

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Application Number Title Priority Date Filing Date
EP09797019A Active EP2376696B1 (de) 2008-12-31 2009-12-15 Waschmaschine mit sicherheitsbezogener geschwindigkeitskontrolle

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EP (1) EP2376696B1 (de)
WO (1) WO2010076203A1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3039315C2 (de) * 1980-10-17 1984-10-31 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Schaltungsanordnung zur Stromversorgung eines drehzahlregelbaren Elektromotors
GB2174513B (en) * 1985-05-03 1988-11-09 Hoover Plc Spin speed control means for laundry spin driers or other centrifuges
US6282965B1 (en) * 1998-11-20 2001-09-04 Emerson Electric Co. Method and apparatus for detecting washing machine tub imbalance

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EP2376696A1 (de) 2011-10-19
WO2010076203A1 (en) 2010-07-08

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