WO2012118278A2 - Procédé de commande de machine à laver - Google Patents

Procédé de commande de machine à laver Download PDF

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Publication number
WO2012118278A2
WO2012118278A2 PCT/KR2012/000595 KR2012000595W WO2012118278A2 WO 2012118278 A2 WO2012118278 A2 WO 2012118278A2 KR 2012000595 W KR2012000595 W KR 2012000595W WO 2012118278 A2 WO2012118278 A2 WO 2012118278A2
Authority
WO
WIPO (PCT)
Prior art keywords
drum
time duration
acceleration
laundry
deceleration
Prior art date
Application number
PCT/KR2012/000595
Other languages
English (en)
Other versions
WO2012118278A3 (fr
Inventor
Aekyung Chae
Youngjong Kim
Original Assignee
Lg Electronics Inc.
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 Lg Electronics Inc. filed Critical Lg Electronics Inc.
Priority to CN2012800102061A priority Critical patent/CN103403244A/zh
Publication of WO2012118278A2 publication Critical patent/WO2012118278A2/fr
Publication of WO2012118278A3 publication Critical patent/WO2012118278A3/fr

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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
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/24—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a vertical axis
    • D06F37/245—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
    • 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
    • D06F37/02—Rotary receptacles, e.g. drums

Definitions

  • the present invention relates to a washing machine, and particularly, to a method for controlling a washing machine capable of compensating for a vibration characteristic due to an unbalanced state of a drum, by effectively controlling a ball balancer for compensating for a balance of a rotary body such as a drum.
  • a washing machine serves to accelerate a chemical operation of a detergent by forcibly forming a current of washing water inside a drum with using a mechanical force, and serves to enhance a washing effect by applying a physical operation such as frictions or impacts to laundry.
  • FIG. 1 is a view showing a top load type of washing machine in accordance with the conventional art, in which laundry is put through an upper part of the washing machine under a configuration that a shaft is vertically disposed.
  • the washing machine 10 comprises a cabinet 8 which forms the appearance, a reservoir (or tub) 1 disposed in the cabinet 8, and a drum 2 rotatably disposed in the reservoir 1.
  • the drum is provided with a rotatable pulsator 3 at a lower part thereof, and the drum and the pulsator 3 are driven by being connected to a shaft 5 disposed in a vertical direction and connected to a driving motor 7.
  • the washing machine has a washing process and a dehydrating process.
  • the pulsator 3, or the pulator 3 and the drum 2 are rotated to rotate laundry and water.
  • the dehydrating process water is discharged and the drum 2 is rotated with a high speed, thereby removing water from laundry by a centrifugal force.
  • the reservoir 1 is suspended at a cabinet by a suspension load 4.
  • a ball balancer 9 is provided at an upper part of the drum 2 in a circumferential direction.
  • the ball balancer 9 serves to compensate for an unbalance of the drum due to a concentrated state of laundry inside the drum.
  • the ball balancer 9 is configured as a ring-shaped racer 9c having therein a plurality of metallic balls 9c.
  • fluid 9b such as oil is filled in the racer 9a.
  • the ball balancer 9 moves in a direction for compensating for the unbalance by a difference of a centrifugal force. As a result, the ball balancer 9 makes the drum recover a balanced state.
  • balls provided in a general ball balancer are not rapidly distributed since fluid is filled in the ball balancer.
  • an unbalance of the drum becomes severe at an early dehydrating process. This may increase vibrations. Furthermore, this may cause the reservoir (tub) to collide with the cabinet due to the unbalanced state of the drum.
  • an aspect of the detailed description is to provide a method for controlling a washing machine capable of allowing a drum to maintain a balanced state, by uniformly distributing balls disposed in a ball balancer, before the drum starts to rotate during a dehydrating process, etc. when an unbalance may occur.
  • Another aspect of the detailed description is to provide a method for controlling a washing machine capable of reducing vibrations of a drum and preventing a reservoir from colliding with a cabinet, by allowing a drum to maintain a balanced state by controlling a ball balancer.
  • a method for controlling a washing machine having a drum where a ball balancer is installed comprising: accelerating the drum having laundry therein for a first time duration (t1) until the drum reaches a reference speed from a stationary state; and decelerating the drum for a second time duration (t2) longer than the first time duration (t1) until the drum reaches the stationary state from the state having the reference speed.
  • the second time duration (t2) may be longer than the first time duration (t1) by at least two times.
  • the first time duration may be 5 seconds, and the second time duration may be 10 seconds or more.
  • the reference speed may be 80rpm.
  • the acceleration and the deceleration of the drum may be performed a plurality of times in a repeated manner.
  • the acceleration and the deceleration of the drum may be repeated with a constant period.
  • a predetermined standstill state may be implemented.
  • a speed difference between laundry and the ball balancer may increase. This may allow the balls to move in a direction for compensating for an unbalanced state of the drum. Accordingly, the drum may be rapidly accelerated and then slowly decelerated for uniform distributions of the balls.
  • a dehydrating process may be started after the acceleration and the deceleration of the drum. This may allow the balls inside the ball balancer to be uniformly distributed by the acceleration and the deceleration of the drum, before a dehydrating process of the washing machine is started.
  • a method for controlling a washing machine having a drum where a ball balancer is installed comprising: a washing process for performing a washing operation by supplying washing water into the drum, and by stirring laundry; and a dehydrating process for discharging the washing water contained in the drum, and separating the washing water contained in the laundry from the laundry, wherein the dehydrating process comprises a discharging step of discharging the washing water contained in the drum, a balancing step of compensating for a balance of the drum, and a dehydrating step of separating the washing water from the laundry inside the drum by rotating the drum with a high speed, wherein in the balancing step, the balls disposed in the ball balancer are made to be uniformly distributed by acceleration and deceleration of the drum before the dehydrating step.
  • the drum having the laundry therein may be accelerate for a first time duration (t1) until the drum reaches a reference speed from a stationary state, and then the drum may be decelerated for a second time duration (t2) longer than the first time duration (t1) until the drum reaches the stationary state from the state having the reference speed.
  • the acceleration and the deceleration of the drum may be performed with a constant period.
  • the acceleration and the deceleration of the drum may be repeated a plurality of times.
  • a predetermined standstill state may be implemented.
  • the balls may be made to be uniformly distributed in the ball balancer before a dehydrating process when an unbalance may easily occur. This may allow the drum to maintain a balanced state.
  • the ball balancer may be efficiently controlled to allow the drum to maintain a balanced state. This may reduce vibrations of the drum, and prevent the reservoir from colliding with the cabinet.
  • FIG. 1 is a schematic view of a washing machine in accordance with the conventional art
  • FIG. 2 is a schematic view of a ball balancer of the washing machine of FIG. 1;
  • FIGS. 3 and 4 are graphs each showing a change of a rotation speed of a drum according to a first embodiment of the present disclosure.
  • FIGS. 5 and 6 are schematic views showing a relative position of balls disposed in a ball balancer with respect to laundry according to a first embodiment of FIG. 3.
  • the drum having laundry therein is accelerated for a first time duration (t1) until the drum reaches a reference speed from a stationary state.
  • the drum is decelerated for a second time duration (t2) longer than the first time duration (t1) until the drum reaches the stationary state from the state having the reference speed.
  • the method is applied to a washing machine having a ball balancer in a drum.
  • the washing machine having a ball balancer in a drum is already well-known, and thus its detailed explanations will be omitted.
  • the washing machine is provided with a controller (not shown).
  • the controller is configured to determine a rotation speed of the drum, by controlling a driving motor which rotates the drum.
  • the drum is accelerated and decelerated in an alternating manner. More concretely, the drum having laundry therein is firstly accelerated for a first time duration (t1) until it reaches a reference speed from a stationary state. Then, the drum is decelerated for a second time duration (t2) longer than the first time duration (t1) until the drum reaches the stationary state from the state having the reference speed.
  • a speed difference between laundry and the ball balancer may increase. This may allow the balls to move in a direction for compensating for an unbalanced state of the drum. As the drum is rapidly accelerated and then slowly decelerated, the balls are uniformly distributed in the ball balancer.
  • the first time duration (t1) and the second time duration (t2) may be set in various manners.
  • the second time duration (t2) may be longer than the first time duration (t1) by at least two times.
  • the first time duration may be 5 seconds, and the second time duration may be 10 seconds or more.
  • the balls may be uniformly distributed in the ball balancer by allowing the acceleration to be performed more rapidly than the deceleration.
  • the reference speed ( ⁇ 0) may be also set in various manners. As aforementioned, as a speed difference between laundry and the ball balancer increases, the balls move in a direction for compensating for an unbalanced state of the drum. Accordingly, it is preferable to increase the reference speed for a large speed difference.
  • the driving motor for rotating the drum has to have a limited capacity.
  • the reference speed may be 80rpm.
  • the capacity is limited with consideration of a performance of the driving motor of a general washing machine.
  • the acceleration and the deceleration of the drum may be repeatedly performed a plurality of times. As shown in FIG. 3, the acceleration and the deceleration of the drum may be periodically performed.
  • the balls inside the ball balancer move in fluid. Accordingly, the repeated accelerations and decelerations may allow the balls to be re-aligned, thereby enhancing a balance of the drum.
  • a standstill time duration (t3) may be implemented, which is shown in FIG. 4. Due to the standstill time duration (t3), an excessive load may be prevented from being applied to the driving motor of the drum, and the balls may move in the fluid filled in the ball balancer for a sufficient time. This may allow a position of the balls to be efficiently controlled.
  • FIGS. 5 and 6 show that positions of the balls inside the ball balancer are re-aligned by controlling the drum of the washing machine.
  • FIG. 5 shows a state prior to a dehydrating process, in which the balls 35 of the ball balancer 30 are positioned at the same side as laundry 40.
  • the position of the balls 35 inside the ball balancer is re-aligned during a dehydrating process as shown in FIG. 5. This may allow compensation for an unbalance of the drum.
  • FIG. 6 shows a state prior to a dehydrating process, in which the balls 35 of the ball balancer 30 are positioned in a direction facing the laundry 40, i.e., a direction for compensating for an unbalance of the drum.
  • the position of the balls 35 inside the ball balancer is nearly maintained as shown in FIG. 6 during the dehydrating process.
  • the position of the balls inside the ball balancer is re-aligned before a dehydrating process when an unbalance of the drum may easily occur due to rotations of the drum. This may allow the drum to maintain a balanced state.
  • the reason is because it is efficient to perform the acceleration and the deceleration before the rotary operation of the drum when an unbalance of the drum may easily occur due to a concentrated state of the laundry.
  • the washing machine has a washing process and a dehydrating process.
  • washing water is supplied into the drum and the laundry is stirred.
  • the dehydrating process the water washing inside the drum is discharged, and the washing water contained in the laundry is separated from the laundry.
  • the dehydrating process includes a discharging step of discharging the washing water inside the drum, a balancing step of compensating for a balance of the drum, and a dehydrating step of separating the washing water from the laundry inside the drum by rotating the drum with a high speed.
  • the balls disposed in the ball balancer are made to be uniformly distributed by acceleration and deceleration of the drum before the dehydrating step. More concretely, in the balancing step, the drum having the laundry therein is accelerated for a first time duration (t1) until the drum reaches a reference speed from a stationary state. Then, the drum is decelerated for a second time duration (t2) longer than the first time duration (t1) until the drum reaches the stationary state from the state having the reference speed.
  • the acceleration and the deceleration of the drum are repeated with a constant period.
  • the acceleration and the deceleration of the drum are performed a plurality of times in a repeated manner. After the acceleration and decoration of the drum, a predetermined standstill state may be implemented. This was aforementioned, and thus detailed explanations thereof will be omitted.
  • the balls inside the ball balancer are uniformly distributed by the acceleration and the deceleration of the drum. This may allow the drum to maintain a balanced state.
  • the balls inside the ball balancer are uniformly distributed before the dehydrating process when an unbalance of the drum may easily occur. This may prevent excessive vibrations from occurring from the drum and the reservoir (tub).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

La présente invention se rapporte à un procédé de commande d'une machine à laver pouvant compenser une caractéristique de vibration due à un état déséquilibré d'un tambour, par la commande efficace d'un dispositif d'équilibrage à billes destiné à compenser un équilibre d'un corps rotatif tel qu'un tambour. Le procédé comprend l'accélération du tambour contenant le linge pendant une première durée (t1) jusqu'à ce que le tambour atteigne une vitesse de référence depuis un état fixe, et le ralentissement du tambour pendant une seconde durée (t2) plus longue que la première durée (t1) jusqu'à ce que le tambour atteigne l'état fixe depuis l'état ayant la vitesse de référence.
PCT/KR2012/000595 2011-03-03 2012-01-25 Procédé de commande de machine à laver WO2012118278A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012800102061A CN103403244A (zh) 2011-03-03 2012-01-25 用于控制洗衣机的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2011-0019131 2011-03-03
KR1020110019131A KR20120100321A (ko) 2011-03-03 2011-03-03 세탁기의 제어방법

Publications (2)

Publication Number Publication Date
WO2012118278A2 true WO2012118278A2 (fr) 2012-09-07
WO2012118278A3 WO2012118278A3 (fr) 2012-12-20

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Application Number Title Priority Date Filing Date
PCT/KR2012/000595 WO2012118278A2 (fr) 2011-03-03 2012-01-25 Procédé de commande de machine à laver

Country Status (4)

Country Link
US (1) US20120222222A1 (fr)
KR (1) KR20120100321A (fr)
CN (1) CN103403244A (fr)
WO (1) WO2012118278A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102089969B1 (ko) * 2013-07-12 2020-03-17 삼성전자주식회사 밸런서를 구비한 세탁기 및 그 제어방법
US9809916B2 (en) * 2014-02-19 2017-11-07 Samsung Electronics Co., Ltd. Washing machine with balancer and control method thereof
EP3153620B1 (fr) * 2014-06-09 2020-02-05 LG Electronics Inc. Appareil de lavage
JP6467703B2 (ja) * 2014-12-12 2019-02-13 アクア株式会社 脱水機
CN107541897B (zh) * 2016-06-28 2021-08-20 青岛海尔洗衣机有限公司 洗衣机及其脱水控制方法
KR102557391B1 (ko) * 2016-08-08 2023-07-19 삼성전자주식회사 세탁기 및 그 제어방법
KR20190125658A (ko) 2018-04-30 2019-11-07 주식회사 위니아대우 세탁기 및 언밸런스 제어방법

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KR19980065311A (ko) * 1997-01-08 1998-10-15 김광호 볼 밸런서
KR20090080608A (ko) * 2008-01-22 2009-07-27 삼성전자주식회사 볼 밸런서를 구비한 드럼 세탁기 및 그 제어방법

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Publication number Priority date Publication date Assignee Title
KR0182129B1 (ko) * 1996-06-26 1999-05-15 김광호 볼밸런서를 갖는 세탁기
DE19928657A1 (de) * 1999-06-23 2000-12-28 Diehl Ako Stiftung Gmbh & Co Verfahren zur Messung der Beladung einer Wäschetrommel
US6578225B2 (en) * 2000-05-25 2003-06-17 Skf Autobalance Systems Ab Low-speed prebalancing for washing machines
KR100934652B1 (ko) * 2002-12-28 2009-12-31 엘지전자 주식회사 세탁기의 제어방법
KR100792237B1 (ko) * 2005-09-05 2008-01-07 엘지전자 주식회사 세탁기의 탈수 제어장치 및 방법
CN101173457A (zh) * 2006-10-30 2008-05-07 南京乐金熊猫电器有限公司 滚筒洗衣机的脱水方法
CN101173455A (zh) * 2006-10-30 2008-05-07 南京乐金熊猫电器有限公司 滚筒洗衣机的脱水方法
CN101173453A (zh) * 2006-10-30 2008-05-07 南京乐金熊猫电器有限公司 滚筒洗衣机的脱水方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980065311A (ko) * 1997-01-08 1998-10-15 김광호 볼 밸런서
KR20090080608A (ko) * 2008-01-22 2009-07-27 삼성전자주식회사 볼 밸런서를 구비한 드럼 세탁기 및 그 제어방법

Also Published As

Publication number Publication date
CN103403244A (zh) 2013-11-20
US20120222222A1 (en) 2012-09-06
WO2012118278A3 (fr) 2012-12-20
KR20120100321A (ko) 2012-09-12

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