EP2666899A1 - Procédé permettant de détecter la fin de cycle d'un machine à tambour rotatif - Google Patents

Procédé permettant de détecter la fin de cycle d'un machine à tambour rotatif Download PDF

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Publication number
EP2666899A1
EP2666899A1 EP12168936.8A EP12168936A EP2666899A1 EP 2666899 A1 EP2666899 A1 EP 2666899A1 EP 12168936 A EP12168936 A EP 12168936A EP 2666899 A1 EP2666899 A1 EP 2666899A1
Authority
EP
European Patent Office
Prior art keywords
drum
sensors
detecting
tub
sensor
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Withdrawn
Application number
EP12168936.8A
Other languages
German (de)
English (en)
Inventor
Dusan Heldak
Pavol Vasko
Pavol Petracek
Gerd Maentele
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP12168936.8A priority Critical patent/EP2666899A1/fr
Publication of EP2666899A1 publication Critical patent/EP2666899A1/fr
Withdrawn legal-status Critical Current

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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
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/16—Imbalance
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • 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
    • D06F34/18—Condition of the laundry, e.g. nature or weight

Definitions

  • the present invention relates to a washing machine having a drum rotating about a substantially horizontal axis, comprising supporting means for rotatably supporting the drum in a tub and detecting means for assessing unbalanced condition of washing and/or spinning.
  • washing machine having a drum rotating about a substantially horizontal axis we mean all washing machines in which the rotational axis of the drum is horizontal or inclined.
  • Washing machines having sensors for assessing unbalanced conditions are well known in the art, for instance from EP 1154064 and EP 1167609 . In these documents sensors for detecting acceleration and/or movement of the drum are disclosed.
  • Washing unit usually defined by the tub, the motor used for rotating the drum inside the tub and the transmission between the motor and the drum, is flexible suspended to cabinet, and this system (mass of washing unit, springs and dampers) has its own natural frequencies.
  • the rotatable drum is subject to unbalance mass as result of uneven distribution of clothes load within the drum.
  • the unbalance mass creates a spinning axis distinct from the horizontal geometric axis of drum causing vibration during rotation.
  • Another option is to measure the vibration of washing unit with accelerometers or proximity sensors. If the amplitudes of acceleration are too big, the timer in washing machine interrupts spinning phase, stops the drum and tries to redistribute the laundry to find better laundry distribution with lower unbalance.
  • An object of the present invention is to provide a washing machine and a method for detecting unbalance therein which are not affected by the above technical problems, and which can provide a very reliable assessment of unbalanced conditions independently on the speed of rotation of the drum.
  • Force sensors can be attached to outer bearing ring or to bearing holder surface that is usually made from polymeric material, aluminum, cast iron or zinc alloy material. Measured forces from bearings are used to calculate centrifugal force that is created by unbalanced load and position of unbalanced load inside of the drum. Having this information, axial, angular position of unbalance and magnitude of unbalance (either static or dynamic) is known.
  • the measurement is based on capturing of transmitted forces between two components. Capturing can be done in several physical ways, like using strain gauge sensor, piezoelectric sensor, deformation sensor or others.
  • Roller bearings with sensors for measuring forces are known in automotive or aircraft industry, for instance from DE 10250340 .
  • EP 1695056 the use of a capacitance sensor for measuring the load on a roller bearing, but there is no suggestion to use this sensor for detecting unbalance.
  • No document of prior art suggests an use of sensors associated to roller bearings for load unbalance detection purposes, particularly in washing domestic appliances.
  • a drum type washing machine 10 is shown, with horizontal axes of drum and which has top ( figure 2 ) or front ( figure 1 ) access to a drum 12 rotatably mounted in a tub 14.
  • the drum type washing machine 10 includes a cabinet 16 forming an exterior of the washing machine, a washing unit consisting of the tub 14, the drum 12 and a drive system 18 including a motor 18a, a belt 18b and a pulley 18c for driving an axle 20 of the drum 12.
  • Drum 12 is rotatable provided within the tub 14 with a hub 26 (bearing holder) on one side of drum (for front loader) or on both sides of tub (for top loader).
  • a strain gauge sensor 28 is placed on an outside annular surface 26a of the hub 26, i.e. on the surface which is opposite the inner surface 26b on which two ball bearings B are mounted for supporting the axle 20 of the drum 12.
  • a flange 30 of the hub 26 for fixing the hub to the tub 14.
  • the first part of the speed pattern is related to a washing phase in which the drum turn clockwise and counterclockwise for a predetermined period (tumbling phase A).
  • the phase C at around 100 rpm, shows an unbalance measurement by means of motor speed fluctuations.
  • area D it is indicated a suspension system natural frequency area
  • area E an area where it is possible to get clear signal from known accelerometers.
  • area F it is indicated an area where clear signals can be derived from sensors according to the invention, i.e. placed in the proximity of the ball bearings for sensing forces/strains.
  • figures 7 to 13 are comparisons between a traditional washer with four accelerometers K mounted on the tub 14 ( figure 6 ) and an identical washer modified according to the invention, i.e. in which four strain sensors are installed in the hub as shown in figure 4 .
  • Figure 7 is a comprehensive comparison for different speeds of the drum and for a fixed (artificial) unbalance of 0,5 kg put in front of the drum.
  • figure 7 as in the following figures 8-13 , on X axis time is reported, while on Y axis, upper part, it is reported the signal from the four accelerometers of figure 6 in m/seC 2 (front-up, rear-up, front-side and rear-side), the signal from the four sensors 28 of figure 4 , and the signal from tachometric generator.
  • drum volume can be enlarged by increasing diameters of drum and tub and reducing clearances with cabinet. All necessary gaps can be optimized and reduced.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP12168936.8A 2012-05-22 2012-05-22 Procédé permettant de détecter la fin de cycle d'un machine à tambour rotatif Withdrawn EP2666899A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12168936.8A EP2666899A1 (fr) 2012-05-22 2012-05-22 Procédé permettant de détecter la fin de cycle d'un machine à tambour rotatif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12168936.8A EP2666899A1 (fr) 2012-05-22 2012-05-22 Procédé permettant de détecter la fin de cycle d'un machine à tambour rotatif

Publications (1)

Publication Number Publication Date
EP2666899A1 true EP2666899A1 (fr) 2013-11-27

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Family Applications (1)

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EP12168936.8A Withdrawn EP2666899A1 (fr) 2012-05-22 2012-05-22 Procédé permettant de détecter la fin de cycle d'un machine à tambour rotatif

Country Status (1)

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EP (1) EP2666899A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3075895A1 (fr) * 2015-03-31 2016-10-05 LG Electronics Inc. Machine à laver à tambour et son procédé de commande
US10975512B2 (en) 2018-10-05 2021-04-13 Haier Us Appliance Solutions, Inc. Washing machine appliance and methods for preventing spin out-of-balance conditions
US11028517B2 (en) 2018-07-18 2021-06-08 Haier Us Appliance Solutions, Inc. Washing machine appliance and methods for out-of-balance detection and mitigation
US11332867B2 (en) 2019-02-05 2022-05-17 Haier Us Appliance Solutions, Inc. Washing machine appliances and methods of using detected motion to limit bearing forces

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071308B1 (fr) 1981-07-31 1986-05-14 Philips Electronics Uk Limited Système de régulation de la vitesse de rotation du tambour pour machine à laver
EP0856604A2 (fr) * 1997-01-31 1998-08-05 FAGOR, S.Coop Méthode pour l'equilibrage d'une machine a laver
EP1154064A2 (fr) 2000-05-09 2001-11-14 Whirpool Corporation Dispositif pour limiter le balourd dans une machine à laver le linge
EP1167609A1 (fr) 2000-06-30 2002-01-02 Whirlpool Corporation Procédé pour détecter et contrôler le balourd dynamique d'un tambour de machine à laver et machine à laver utilisant un tel procédé
WO2002042541A1 (fr) * 2000-11-24 2002-05-30 Primus N.V. Machines rotatives avec fonctionnement a l'etat desequilibre
DE10250340A1 (de) 2002-10-29 2004-05-19 Ina-Schaeffler Kg Als Wälzlager ausgebildetes Kraftmeßlager
EP1695056A2 (fr) 2003-12-15 2006-08-30 Aktiebolaget SKF (publ) Dispositif de mesure de charge sur un palier, palier à roulement à dispositif de mesure de charge et machine à tambour rotatif
EP2113603A1 (fr) * 2008-04-30 2009-11-04 BSH Bosch und Siemens Hausgeräte GmbH Appareil de séchage de linge et procédé de commande d'un processus de séchage de l'appareil de séchage de linge
EP2206823A1 (fr) * 2008-12-17 2010-07-14 Fisher & Paykel Appliances Limited Machine à laver le linge avec un système de correction d'équilibre
US20100251778A1 (en) * 2006-04-13 2010-10-07 Bsh Bosch Und Siemens Hausgerate Gmbh Machine for Washing and/or Drying Laundry

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071308B1 (fr) 1981-07-31 1986-05-14 Philips Electronics Uk Limited Système de régulation de la vitesse de rotation du tambour pour machine à laver
EP0856604A2 (fr) * 1997-01-31 1998-08-05 FAGOR, S.Coop Méthode pour l'equilibrage d'une machine a laver
EP1154064A2 (fr) 2000-05-09 2001-11-14 Whirpool Corporation Dispositif pour limiter le balourd dans une machine à laver le linge
EP1167609A1 (fr) 2000-06-30 2002-01-02 Whirlpool Corporation Procédé pour détecter et contrôler le balourd dynamique d'un tambour de machine à laver et machine à laver utilisant un tel procédé
WO2002042541A1 (fr) * 2000-11-24 2002-05-30 Primus N.V. Machines rotatives avec fonctionnement a l'etat desequilibre
DE10250340A1 (de) 2002-10-29 2004-05-19 Ina-Schaeffler Kg Als Wälzlager ausgebildetes Kraftmeßlager
EP1695056A2 (fr) 2003-12-15 2006-08-30 Aktiebolaget SKF (publ) Dispositif de mesure de charge sur un palier, palier à roulement à dispositif de mesure de charge et machine à tambour rotatif
US20100251778A1 (en) * 2006-04-13 2010-10-07 Bsh Bosch Und Siemens Hausgerate Gmbh Machine for Washing and/or Drying Laundry
EP2113603A1 (fr) * 2008-04-30 2009-11-04 BSH Bosch und Siemens Hausgeräte GmbH Appareil de séchage de linge et procédé de commande d'un processus de séchage de l'appareil de séchage de linge
EP2206823A1 (fr) * 2008-12-17 2010-07-14 Fisher & Paykel Appliances Limited Machine à laver le linge avec un système de correction d'équilibre

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3075895A1 (fr) * 2015-03-31 2016-10-05 LG Electronics Inc. Machine à laver à tambour et son procédé de commande
US11028517B2 (en) 2018-07-18 2021-06-08 Haier Us Appliance Solutions, Inc. Washing machine appliance and methods for out-of-balance detection and mitigation
US10975512B2 (en) 2018-10-05 2021-04-13 Haier Us Appliance Solutions, Inc. Washing machine appliance and methods for preventing spin out-of-balance conditions
US11332867B2 (en) 2019-02-05 2022-05-17 Haier Us Appliance Solutions, Inc. Washing machine appliances and methods of using detected motion to limit bearing forces

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