EP2765230B1 - Procédé de fonctionnement d'une machine à laver et machine à laver utilisant un tel procédé - Google Patents
Procédé de fonctionnement d'une machine à laver et machine à laver utilisant un tel procédé Download PDFInfo
- Publication number
- EP2765230B1 EP2765230B1 EP13154334.0A EP13154334A EP2765230B1 EP 2765230 B1 EP2765230 B1 EP 2765230B1 EP 13154334 A EP13154334 A EP 13154334A EP 2765230 B1 EP2765230 B1 EP 2765230B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- laundry
- parameter
- motor
- speed
- 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.)
- Not-in-force
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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
- D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
- D06F35/005—Methods for washing, rinsing or spin-drying
- D06F35/007—Methods for washing, rinsing or spin-drying for spin-drying only
-
- 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
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/16—Imbalance
Definitions
- the present invention relates to a method of operating a laundry treating appliance having a rotatable drum defining a treating chamber for receiving laundry for treatment, and a motor rotating the drum. More specifically, the present invention relates to the above method comprising increasing the rotational speed of the drum by increasing the rotational speed of the motor and measuring at least one parameter related to the rotation of the drum/motor in order to determine the degree of the laying of the laundry articles against the inner wall of the drum. Even if the method according to the invention will be mainly used for washing machines, it can be used also for tumble dryers and washer-dryers as well.
- a known method is disclosed by EP 2379786 where the measured parameter (a measurement variable or a control variable) has a harmonic oscillation produced by an unbalance.
- Such known method requires a quite complex comparison between a theoretical sinusoidal oscillation of the parameter and the actual oscillation, so as to determine the degree of the laying of the laundry articles against the inner wall of the drum on the basis of the correlation.
- This known method requires a quite complex algorithm capable of carrying out such correlation.
- the degree of the laying of the laundry articles against the inner wall of the drum i.e.
- the percentage of load retained in a substantially fixed position relative to the drum by centrifugal force may be considered a too rich information for the actual purpose of washer control, since what matters is only the speed at which all clothes into the drum of the washing machine are stuck to the side wall of the drum by means of the centrifugal force effect.
- the unbalance determination can be safely and quickly carried out without the need of reaching a fixed predetermined value as in the old washing machines (i.e. saving cycle time and energy).
- carrying out unbalance detection at a speed identical or very close to the actual speed at which laundry is retained in a fixed position relative to the drum by centrifugal force has advantages also in view of the accuracy and robustness of unbalance detection.
- Document WO 2004/025012 discloses an operating cycle for a clothes washing machine, including an anti-creasing phase whose parameters may be adjusted by the user.
- the detachment of the laundry ring at the inner wall of the drum is monitored by measuring state variables and by comparing the measurements with reference data.
- one object of the present invention is to provide a method as mentioned at the beginning of the description which allows a simple, reliable and inexpensive method to detect detect the speed at which laundry is entirely retained in a substantially fixed position relative to the drum by centrifugal force, so that no portion of load is allowed to tumble.
- any signal related to the energy of the motor system, particularly torque or power thereof, is monitored during acceleration phase and the speed at which laundry articles are against the side wall of the drum due to centrifugal force is detected when said signal reaches an absolute minimum.
- the main advantage of the solution according to the present invention is that the complexity is dramatically reduced. Moreover, since the concept is based on the physical behavior of the laundry inside the drum (mechanical energy balance), the algorithm according to the invention is calibration free with respect to machine type/model variation. In few words, no additional effort is required to calibrate algorithm parameters.
- the technical solution according to the invention starts from the consideration that during an acceleration speed profile it is possible to identify three phases (I, II, III in figures 1 and 2 ).
- the laundry inside the drum is tumbling.
- the amount of laundry stuck on the side of the drum increases as the speed increases, while the tumbling load amount decreases. This condition holds until the drum reaches a certain speed in which all clothes are stuck to the side of the drum (phase III).
- This speed is known in washing machines jargon as "satelization speed”.
- T mot I is the motor torque
- b frict is the viscous friction coefficient
- ⁇ is the rotational speed of the drum
- T laundry I is the torque due to the gravity acceleration acting on non-satelized laundry and to the inertia momentum of the laundry. This last term can be considered as an additive friction torque amount that the motor should overcome.
- J 0 is the inertia momentum of the machine with empty drum.
- Phase II ( figure 4 ): as the speed increases, the centrifugal force is increasing and starts sticking laundry on the drum side wall. This amount of laundry when rotating in the left side of the drum starts to "help" motor deliver the torque needed. So, the motor torque required ( T mot II ) decreases.
- Phase III ( figure 5 ): motor torque continues to decrease from its initials values until the instant in which all the clothes are “plastered” or fixedly retained due to the fact that when the laundry is completely stuck, motor must lift up approximately half of the laundry amount (right side) while the other half (left side) "helps” the motor to deliver needed torque.
- T frict is a constant friction torque
- T mot b frict ⁇ + J sat ⁇ ⁇ + T frict
- Figure 6 shows the absolute minimum reached by the low frequency component of the torque when the "satelization speed" is reached. The applicant observed that after "satelization speed” the motor torque signal increases linearly due to the viscous term of the above mechanical equation.
- the algorithm according to the invention is the consequence of the above findings to detect the "satelization speed" in a simple and reliable way.
- the torque low frequency component (or the average torque) is processed and, when the absolute minimum is found, the corresponding reached speed is the "satelization speed".
- the signal processed by the algorithm to detect the "satelization speed" is the mechanical/electrical power as signal related to the energy of the motor.
- the main signal processed by the algorithm according to the invention is preferably the low frequency component of the real signal. Accordingly, the algorithm finds the absolute minimum processing the real signal filtered with a low pass filter or with a "sliding moving average” or with any other method which eliminates the high frequency components.
- the main algorithm steps are as follows: the algorithm monitors the input main signal (torque/power etc..), it waits until the absolute minimum occurs and, when the absolute minimum occurs, it gets the actual speed value and set it as "satelization speed".
- a solution to detect the absolute minimum is to process the torque (or power) signal with a suitable digital filter (eg., "robust noise differentiator” technique well known in the literature) and compare values to get minima and maxima.
- fig. 7 shows that the low frequency component of the power (or torque) signal could present local minima due to the laundry tumbling and inertia geometry variation during distribution.
- the algorithm according to the invention waits preferably a predefined time (machine model dependent) and monitors if a new maximum is found (i.e., due to the physical behavior of the laundry inside the drum, if a maximum happens a new minimum will come).
- Figure 9 shows such variant of the absolute minimum search algorithm in the details. Experiments carried out by the applicant on a washer machine have shown that the method according to the invention is very reliable and that the effect of variation of the viscous friction coefficient is negligible.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Claims (7)
- Procédé de fonctionnement d'un appareil de traitement de linge ayant un tambour rotatif définissant une chambre de traitement pour recevoir du linge à traiter et un moteur faisant tourner le tambour, le procédé comprenant l'augmentation de la vitesse de rotation du tambour en augmentant la vitesse de rotation du moteur et en mesurant au moins un paramètre se rapportant à la rotation du tambour afin de déterminer le degré du dépôt des articles de linge contre la paroi interne du tambour, ledit paramètre se rapportant à l'énergie du moteur et étant le couple moteur ou la puissance motrice, caractérisé en ce que le paramètre précité est contrôlé et la vitesse à laquelle tous les articles de linge sont retenus contre la paroi du tambour par la force centrifuge est évaluée lorsque ledit paramètre atteint une valeur minimale.
- Procédé selon la revendication précédente, dans lequel seule la composante de basse fréquence dudit paramètre est contrôlée.
- Procédé selon l'une quelconque des revendications précédentes, dans lequel ledit paramètre est filtré pour éliminer les composantes de haute fréquence.
- Procédé selon l'une quelconque des revendications précédentes, dans lequel, une fois que ledit minimum est détecté, il comprend l'étape visant à attendre une période de temps prédéterminée et à contrôler si un nouveau minimum est trouvé après un maximum intermédiaire.
- Appareil de traitement de linge ayant un tambour rotatif définissant une chambre de traitement pour recevoir du linge à traiter, un moteur faisant tourner le tambour, une unité de commande adaptée pour augmenter la vitesse de rotation du tambour en augmentant la vitesse de rotation du moteur et mesurer au moins un paramètre se rapportant à la rotation du tambour pour déterminer le degré de dépôt des articles de linge contre la paroi interne du tambour, ledit paramètre se rapportant à l'énergie du moteur et étant le couple moteur ou la puissance motrice, caractérisé en ce que cette unité de commande est adaptée pour vérifier le paramètre précité afin d'évaluer la vitesse à laquelle tous les articles de linge sont retenus contre la paroi du tambour par la force centrifuge, cette vitesse correspondant à la vitesse à laquelle ledit paramètre atteint une valeur minimale.
- Appareil de traitement de linge selon la revendication 5, dans lequel cette unité de commande est adaptée pour filtrer ledit paramètre afin d'éliminer les composantes de haute fréquence.
- Appareil de traitement de linge selon la revendication 5 ou la revendication 6, dans lequel ladite unité de commande est adaptée pour attendre, après que ledit minimum a été détecté, une période de temps prédéterminée et contrôler si un nouveau minimum est trouvé après un maximum intermédiaire.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13154334.0A EP2765230B1 (fr) | 2013-02-07 | 2013-02-07 | Procédé de fonctionnement d'une machine à laver et machine à laver utilisant un tel procédé |
PL13154334T PL2765230T3 (pl) | 2013-02-07 | 2013-02-07 | Sposób działania pralki i pralka wykorzystująca taki sposób |
US14/173,240 US20140215725A1 (en) | 2013-02-07 | 2014-02-05 | Methods of operating washing machines and washing machines using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13154334.0A EP2765230B1 (fr) | 2013-02-07 | 2013-02-07 | Procédé de fonctionnement d'une machine à laver et machine à laver utilisant un tel procédé |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2765230A1 EP2765230A1 (fr) | 2014-08-13 |
EP2765230B1 true EP2765230B1 (fr) | 2016-07-20 |
Family
ID=47681769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13154334.0A Not-in-force EP2765230B1 (fr) | 2013-02-07 | 2013-02-07 | Procédé de fonctionnement d'une machine à laver et machine à laver utilisant un tel procédé |
Country Status (3)
Country | Link |
---|---|
US (1) | US20140215725A1 (fr) |
EP (1) | EP2765230B1 (fr) |
PL (1) | PL2765230T3 (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9988751B2 (en) | 2015-07-29 | 2018-06-05 | Whirlpool Corporation | Laundry treating appliance and methods of reducing tub contact therein |
WO2017020164A1 (fr) * | 2015-07-31 | 2017-02-09 | 广东威灵电机制造有限公司 | Machine à laver à rouleau et procédé de détection de déséquilibre et dispositif associé |
KR101755831B1 (ko) * | 2015-08-28 | 2017-07-10 | 현대자동차주식회사 | 모터 제어 방법 |
US10273621B2 (en) | 2015-10-01 | 2019-04-30 | Whirlpool Corporation | Laundry treating appliance and methods of operation |
US9863080B2 (en) | 2015-11-19 | 2018-01-09 | Whirlpool Corporation | Laundry treating appliance and methods of operation |
US10041202B2 (en) | 2015-11-19 | 2018-08-07 | Whirlpool Corporation | Laundry treating appliance and methods of operation |
US9885135B2 (en) | 2015-11-19 | 2018-02-06 | Whirlpool Corporation | Laundry treating appliance and methods of operation |
US9873968B2 (en) | 2015-11-19 | 2018-01-23 | Whirlpool Corporation | Laundry treating appliance and methods of operation |
US9988753B2 (en) | 2015-11-19 | 2018-06-05 | Whirlpool Corporation | Laundry treating appliance and methods of operation |
US9890490B2 (en) | 2015-11-19 | 2018-02-13 | Whirlpool Corporation | Laundry treating appliance and methods of operation |
KR102527576B1 (ko) * | 2016-10-07 | 2023-04-28 | 엘지전자 주식회사 | 세탁기 및 그 제어방법 |
CN110872761B (zh) * | 2018-08-31 | 2022-02-25 | 无锡飞翎电子有限公司 | 滚筒洗衣机的偏心检测方法 |
US10982372B2 (en) | 2018-10-02 | 2021-04-20 | Haier Us Appliance Solutions, Inc. | Washing machine appliances and methods for setting plaster speed |
US11053621B2 (en) | 2018-10-02 | 2021-07-06 | Haier Us Appliance Solutions, Inc. | Washing machine appliances and methods of operation for determining load size |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10241682B4 (de) * | 2002-09-09 | 2006-01-19 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Betreiben einer programmierbaren Waschmaschine |
US7591038B2 (en) * | 2003-04-28 | 2009-09-22 | Emerson Electric Co., | Method and system for operating a clothes washing machine |
US7530133B2 (en) * | 2005-02-18 | 2009-05-12 | Whirlpool Corporation | Method for controlling a spin cycle in a washing machine |
ATE520813T1 (de) * | 2008-03-11 | 2011-09-15 | Electrolux Ab | Verfahren zur wäschebearbeitung und vorrichtung zur wäschebearbeitung |
DE102008055091A1 (de) | 2008-12-22 | 2010-06-24 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Steuern eines Wäscheverteilbetriebs eines Haushaltsgeräts zur Pflege von Wäschestücken |
US8528229B2 (en) * | 2009-02-19 | 2013-09-10 | Whirlpool Corporation | Laundry treating appliance with imaging control |
US8166590B2 (en) * | 2009-04-16 | 2012-05-01 | Whirlpool Corporation | Method and apparatus for determining laundry load size |
US8915972B2 (en) * | 2011-05-17 | 2014-12-23 | Whirlpool Corporation | Method and apparatus for determining load fall in a laundry treating appliance |
US9115456B2 (en) * | 2011-12-20 | 2015-08-25 | Whirlpool Corporation | Method for detecting satellization speed of clothes load in a horizontal axis laundry treating appliance |
US8689641B2 (en) * | 2012-07-17 | 2014-04-08 | Whirlpool Corporation | Detecting satellization of a laundry load |
-
2013
- 2013-02-07 EP EP13154334.0A patent/EP2765230B1/fr not_active Not-in-force
- 2013-02-07 PL PL13154334T patent/PL2765230T3/pl unknown
-
2014
- 2014-02-05 US US14/173,240 patent/US20140215725A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP2765230A1 (fr) | 2014-08-13 |
US20140215725A1 (en) | 2014-08-07 |
PL2765230T3 (pl) | 2017-08-31 |
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