US20070050918A1 - Dehydration control apparatus and method for washing machine - Google Patents

Dehydration control apparatus and method for washing machine Download PDF

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Publication number
US20070050918A1
US20070050918A1 US11/514,939 US51493906A US2007050918A1 US 20070050918 A1 US20070050918 A1 US 20070050918A1 US 51493906 A US51493906 A US 51493906A US 2007050918 A1 US2007050918 A1 US 2007050918A1
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US
United States
Prior art keywords
dehydration
unbalance
target speed
load
unbalance quantity
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.)
Abandoned
Application number
US11/514,939
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English (en)
Inventor
Jae-hyun Kim
Bon-Kwon Koo
Si-Moon Jeon
Tae-Hee Lee
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.)
LG Electronics Inc
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
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JEON, SI-MOON, KIM, JAE-HYUN, KOO, BON-KWON, LEE, TAE-HEE
Publication of US20070050918A1 publication Critical patent/US20070050918A1/en
Assigned to NATIONAL INSTITUTES OF HEALTH (NIH), U.S. DEPT. OF HEALTH AND HUMAN SERVICES (DHHS), U.S. GOVERNMENT reassignment NATIONAL INSTITUTES OF HEALTH (NIH), U.S. DEPT. OF HEALTH AND HUMAN SERVICES (DHHS), U.S. GOVERNMENT CONFIRMATORY LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: CHILDREN'S HOSPITAL (BOSTON)
Abandoned 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
    • 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 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry
    • 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
    • D06F2103/24—Spin speed; Drum movements
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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 
    • D06F33/48—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
    • 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 washing machine, and more particularly, to a dehydration control apparatus and method for a washing machine which can sense variations of a dehydration quantity and apply different reference unbalance quantities according to the varied load quantities.
  • a washing machine applies a mechanical operation, such as friction or vibration, to the laundry put in a washing solution, thereby separating contaminants from the laundry.
  • the washing machine performs a washing step for applying a mechanical force to the laundry mixed with the washing solution, a rinsing step for separating the washing solution containing contaminants from the laundry, and a dehydration step for separating the rinsing water from the laundry.
  • the washing machine needs a laundry leveling function of detecting an unbalance quantity and evenly distributing the laundry according to the detected unbalance quantity.
  • FIG. 1 is a flowchart illustrating a related art unbalance quantity detecting and dehydration method for a washing machine.
  • the related art unbalance quantity detecting and dehydration method for the washing machine includes the steps of: operating a motor of the washing machine at a low speed (S 11 ); detecting an unbalance quantity by sensing variations of a speed (RPM) of the motor (S 12 ); comparing a preset reference unbalance quantity with the detected unbalance quantity (S 13 ); when the detected unbalance quantity is larger than the reference unbalance quantity, performing a laundry leveling function (S 14 A), and when the detected unbalance quantity is smaller than the reference unbalance quantity, performing the dehydration operation by increasing the speed of the motor (S 14 B).
  • the step (S 12 ) for detecting the unbalance quantity will now be explained in detail with reference to FIG. 2 .
  • Variations in the spinning speed (RPM) of the motor of the washing machine are detected by measuring the spinning speed of the motor at intervals of a predetermined time and period using a speed detecting unit mounted on the motor.
  • An unbalance quantity and a load quantity at point A of FIG. 2 are detected using a maximum variation and a minimum variation among the variations of the spinning speed of the motor of the washing machine.
  • the detected unbalance quantity is compared with a reference unbalance quantity corresponding to a preset load quantity.
  • the motor of the washing machine is stopped, the spinning direction of the motor is changed, and the laundry leveling function is performed again.
  • the dehydration operation is performed to remove moisture from the laundry by increasing the speed of the motor below a resonance speed. Thereafter, the speed of the motor is decreased and an unbalance quantity in point B of FIG. 2 is detected.
  • the dehydration operation is performed by increasing the speed of the motor.
  • the speed of the motor reaches a preset dehydration speed, the speed of the motor is decreased after a predetermined time, and an unbalance quantity at point C of FIG. 2 is detected.
  • the speed of the motor is increased to a preset dehydration speed, and the dehydration operation is performed at the dehydration speed for a preset time and stopped.
  • the load quantities in A, B and C of FIG. 2 are varied by increase of the dehydration speed.
  • the related art dehydration control apparatus and method for the washing machine determine the reference unbalance quantity by using the first sensed load quantity.
  • the present invention is directed to a dehydration control apparatus and method for washing machine that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
  • An advantage of the present invention is to provide a dehydration control apparatus and method for a washing machine which can restrict noise and vibration resulting from mis-application of a reference unbalance quantity and reduce a dehydration entering time, by sensing variations of a dehydration quantity and applying different reference unbalance quantities according to the varied load quantities.
  • a dehydration control apparatus for a washing machine including: a storing unit for storing reference unbalance quantities according to each load quantity; and a control unit for detecting a load quantity and an unbalance quantity by accelerating or decelerating a motor of the washing machine, comparing a reference unbalance quantity corresponding to the detected load quantity with the detected unbalance quantity, and determining dehydration completion based upon the comparison result.
  • a dehydration control method for a washing machine which spin-dries the laundry in an optimum state, the method including: detecting a load quantity and an unbalance quantity of the laundry by increasing or decreasing a dehydration speed; and comparing a reference unbalance quantity corresponding to the detected load quantity with the detected unbalance quantity, and determining dehydration completion according to the comparison result.
  • a dehydration control method for a washing machine which spin-dries the laundry in optimum state, the method including: detecting a first load quantity and a first unbalance quantity at a first target speed in a dehydration mode; comparing the first unbalance quantity with a first reference unbalance quantity corresponding to the first load quantity, one of accelerating a wash tub to a second target speed according to the comparison result and decelerating the wash tub to the first target speed, and detecting a second load quantity and a second unbalance quantity; comparing the second unbalance quantity with a second reference unbalance quantity corresponding to the second load quantity, one of accelerating the wash tub to a third target speed according to the comparison result and decelerating the wash tub to the first target speed, and detecting a third load quantity and a third unbalance quantity; and comparing the third unbalance quantity with a third reference unbalance quantity corresponding to the third load quantity, and confirming final dehydration according to the comparison result
  • FIG. 1 is a flowchart illustrating a related art unbalance quantity detecting and dehydration method for a washing machine
  • FIG. 2 is a graph illustrating a related art dehydration process
  • FIG. 3 is a block diagram illustrating a structure of a dehydration control apparatus for a washing machine in accordance with an embodiment of the present invention
  • FIG. 4 is a flowchart illustrating a dehydration control method for a washing machine in accordance with an embodiment of the present invention.
  • FIG. 5 is a graph illustrating a dehydration process of the washing machine in accordance with the present invention.
  • a dehydration control apparatus and method for a washing machine which can restrict noise and vibration resulting from mis-application of a reference unbalance quantity and reduce a dehydration time, by sensing variations of a dehydration quantity and applying different reference unbalance quantities according to the varied load quantities will now be described in detail with reference to the accompanying drawings.
  • FIG. 3 is a block diagram illustrating the structure of the dehydration control apparatus for the washing machine in accordance with an embodiment of the present invention.
  • the dehydration control apparatus for the washing machine includes a motor 100 , a driving unit 500 , a storing unit 300 , a display unit 400 and a control unit 200 .
  • the motor 100 rotates a wash tub in the washing machine.
  • the driving unit 500 drives the motor 100 .
  • the storing unit 300 stores reference unbalance quantities corresponding to each load quantity.
  • the display unit 400 displays a washing operation proceeding state of the washing machine.
  • the control unit 200 wholly controls the washing operation of the washing machine.
  • control unit 200 detects a load quantity and an unbalance quantity by increasing or decreasing a dehydration speed of the washing machine, compares the reference unbalance quantity corresponding to the detected load quantity with the detected unbalance quantity, and determines dehydration completion according to the compared result.
  • the storing unit 300 stores, in advance, pre-determined optimum reference unbalance quantities corresponding to each load quantity.
  • the storing unit 300 may be comprised of a ROM table for storing the reference unbalance quantities corresponding to each load quantity in the form of database.
  • the control unit 200 In a dehydration mode (SP 1 ), the control unit 200 maintains a first target speed (about 100 RPM) at point A of FIG. 5 , and calculates a first load quantity and a first unbalance quantity (SP 2 ).
  • the control unit 200 selects a first reference unbalance quantity that corresponds to the first load quantity from the storing unit 300 , and compares the selected first reference unbalance quantity with the first unbalance quantity (SP 3 ).
  • the control unit 200 repeatedly performs the dehydration operation by applying the first unbalance quantity at the first target speed, to complete dehydration (SP 4 and SP 5 ).
  • the control unit 200 increases the dehydration speed to a second target speed (about 200 PRM) at point B of FIG. 5 (SP 6 ), constantly maintains the second target speed, and performs the dehydration operation (SP 7 ).
  • control unit 200 After performing the dehydration operation at the second target speed for a predetermined time, the control unit 200 decreases the second target speed to the first target speed by dynamic braking (SP 8 ), and calculates a second load quantity and a second unbalance quantity.
  • SP 8 dynamic braking
  • three terminals (positive/negative terminals and ground terminal) of the motor are shorted by a switch for driving the motor, and a braking torque generated by the short is controlled and applied to the motor.
  • the control unit 200 compares the second unbalance quantity with the second reference unbalance quantity corresponding to the second load quantity (SP 10 ).
  • control unit 200 If the second unbalance quantity is larger than the second reference unbalance quantity corresponding to the second load quantity, the control unit 200 repeatedly performs the dehydration operation by applying the second unbalance quantity at the second target speed to complete dehydration (SP 11 and SP 5 ).
  • control unit 200 increases the dehydration speed of the washing machine to a third target speed (about 400 PRM) at point C of FIG. 5 (SP 12 ), constantly maintains the third target speed, and performs the dehydration operation (SP 13 ).
  • control unit 200 After performing the dehydration operation at the third target speed for a predetermined time, the control unit 200 decreases the third target speed to the first target speed by dynamic braking (SP 14 ), and calculates a third load quantity and a third unbalance quantity.
  • SP 14 dynamic braking
  • the third load quantity is detected using the formula above for calculating the second load quantity.
  • first target speed, the second target speed and the third target speed satisfy ‘the first target speed ⁇ the second target speed ⁇ the third target speed’.
  • the control unit 200 compares the third unbalance quantity with the third reference unbalance quantity corresponding to the third load quantity (SP 16 ).
  • control unit 200 If the third unbalance quantity is larger than the third reference unbalance quantity corresponding to the third load quantity, the control unit 200 repeatedly performs the dehydration operation by applying the third unbalance quantity to complete dehydration (SP 17 and SP 5 ).
  • control unit 200 increases the dehydration speed of the washing machine to the third target speed (about 400 PRM) (SP 12 ), constantly maintains the third target speed, and performs the dehydration operation (SP 13 ).
  • control unit 200 After performing the dehydration operation at the third target speed for a predetermined time, the control unit 200 decreases the third target speed to the first target speed by dynamic braking (SP 14 ), and repeatedly updates the third load quantity and the third unbalance quantity until the third unbalance quantity is larger than the third reference unbalance quantity corresponding to the third load quantity.
  • SP 14 dynamic braking
  • the actual weight of the laundry varied by the laundry leveling function and the dehydration operation is applied in the dehydration mode of the washing machine.
  • the dehydration operation is carried out using the reference unbalance quantity corresponding to the actual weight of the laundry.
  • the dehydration control apparatus and method for the washing machine can restrict noise and vibration resulting from mis-application of the reference unbalance quantity and reduce the dehydration entering time, by sensing variations of the dehydration quantity and applying different reference unbalance quantities according to the varied load quantities in the dehydration mode.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
US11/514,939 2005-09-05 2006-09-05 Dehydration control apparatus and method for washing machine Abandoned US20070050918A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020050082319A KR100792237B1 (ko) 2005-09-05 2005-09-05 세탁기의 탈수 제어장치 및 방법
KR10-2005-0082319 2005-09-05

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US (1) US20070050918A1 (fr)
EP (1) EP1760181A1 (fr)
KR (1) KR100792237B1 (fr)
CN (1) CN1928210B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090241605A1 (en) * 2008-03-28 2009-10-01 Electrolux Home Products, Inc. Laundering Device Vibration Control
US20090307851A1 (en) * 2008-05-23 2009-12-17 Sun Cheol Bae Washing machine and method of controlling a washing machine
US20100037401A1 (en) * 2008-05-23 2010-02-18 Sun Cheol Bae Washing machine and method of controlling a washing machine
US20110067185A1 (en) * 2009-09-21 2011-03-24 Lg Electronics Inc. Washing method and washing machine
US20120024016A1 (en) * 2010-07-30 2012-02-02 David Scott Dunn Method and apparatus for balancing an unbalanced load in a washing machine
US20120222222A1 (en) * 2011-03-03 2012-09-06 Lg Electronics Inc. Method for controlling washing machine
US20140007680A1 (en) * 2011-03-28 2014-01-09 Ui Kun HWANG Method for determining imbalance in drum washing machine
US8932369B2 (en) 2010-04-13 2015-01-13 Whirlpool Corporation Method and apparatus for determining an unbalance condition in a laundry treating appliance
US20150252509A1 (en) * 2014-03-10 2015-09-10 Lg Electronics Inc. Washing machine and method for controlling the same
CN111235822A (zh) * 2020-01-13 2020-06-05 青岛海尔洗衣机有限公司 洗涤设备的脱水方法及洗涤设备

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KR101028086B1 (ko) 2008-05-23 2011-04-08 엘지전자 주식회사 세탁물 처리기기 및 세탁물 처리기기의 제어방법
KR100977575B1 (ko) 2008-05-23 2010-08-23 엘지전자 주식회사 세탁물 처리기기 및 세탁물 처리기기의 제어방법
KR100977576B1 (ko) 2008-05-23 2010-08-23 엘지전자 주식회사 세탁물 처리기기 및 세탁물 처리기기의 제어방법
KR101028089B1 (ko) 2008-05-23 2011-04-08 엘지전자 주식회사 세탁물 처리기기 및 세탁물 처리기기의 제어방법
KR101689714B1 (ko) * 2010-04-01 2016-12-26 엘지전자 주식회사 세탁기 및 그 제어방법
SI2527511T1 (sl) * 2012-03-21 2014-05-30 Primus Ce S.R.O. Postopek upravljanja centrifugiranja v pralnem stroju
US8863558B2 (en) * 2012-07-10 2014-10-21 Whirlpool Corporation Laundry treating appliance and method of operation
EP2725129A1 (fr) * 2012-10-26 2014-04-30 Electrolux Home Products Corporation N.V. Procédé de commande d'une machine à laver le linge et machine à laver le linge
CN105155204B (zh) * 2015-07-01 2018-03-13 无锡小天鹅股份有限公司 洗衣机脱水时衣物不平衡状态的检测方法和洗衣机
CN107558098B (zh) * 2017-08-17 2020-11-10 无锡小天鹅通用电器有限公司 衣物处理装置的脱水方法
CN109468804B (zh) * 2018-12-11 2022-12-06 佛山市顺德海尔电器有限公司 洗涤设备的脱水转速控制方法
CN111893707B (zh) * 2020-08-03 2022-11-08 海信冰箱有限公司 一种洗衣机的控制方法及洗衣机
KR20220103276A (ko) * 2021-01-15 2022-07-22 삼성전자주식회사 세탁기 및 세탁기의 제어방법
CN114541085A (zh) * 2022-03-03 2022-05-27 广东威灵电机制造有限公司 洗衣机的脱水控制方法、装置、洗衣机及存储介质
CN114541084B (zh) * 2022-03-03 2024-04-02 广东威灵电机制造有限公司 洗衣机的脱水控制方法、装置、洗衣机及介质

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US20050102766A1 (en) * 2003-11-17 2005-05-19 Maytag Corporation Method and apparatus for spinning fabrics

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090241605A1 (en) * 2008-03-28 2009-10-01 Electrolux Home Products, Inc. Laundering Device Vibration Control
US8695381B2 (en) 2008-03-28 2014-04-15 Electrolux Home Products, Inc. Laundering device vibration control
US8679198B2 (en) 2008-05-23 2014-03-25 Lg Electronics Inc. Washing machine and method of controlling a washing machine
US20090307851A1 (en) * 2008-05-23 2009-12-17 Sun Cheol Bae Washing machine and method of controlling a washing machine
US20100037401A1 (en) * 2008-05-23 2010-02-18 Sun Cheol Bae Washing machine and method of controlling a washing machine
US8938835B2 (en) * 2008-05-23 2015-01-27 Lg Electronics Inc. Washing machine and method of controlling a washing machine
US9181649B2 (en) * 2009-09-21 2015-11-10 Lg Electronics Inc. Washing method and washing machine
US20110067185A1 (en) * 2009-09-21 2011-03-24 Lg Electronics Inc. Washing method and washing machine
US8932369B2 (en) 2010-04-13 2015-01-13 Whirlpool Corporation Method and apparatus for determining an unbalance condition in a laundry treating appliance
US20120024016A1 (en) * 2010-07-30 2012-02-02 David Scott Dunn Method and apparatus for balancing an unbalanced load in a washing machine
US9428854B2 (en) * 2010-07-30 2016-08-30 Haier Us Appliance Solutions, Inc. Method and apparatus for balancing an unbalanced load in a washing machine
US20120222222A1 (en) * 2011-03-03 2012-09-06 Lg Electronics Inc. Method for controlling washing machine
US20140007680A1 (en) * 2011-03-28 2014-01-09 Ui Kun HWANG Method for determining imbalance in drum washing machine
US20150252509A1 (en) * 2014-03-10 2015-09-10 Lg Electronics Inc. Washing machine and method for controlling the same
US10138584B2 (en) * 2014-03-10 2018-11-27 Lg Electronics Inc. Washing machine and method for controlling the same
CN111235822A (zh) * 2020-01-13 2020-06-05 青岛海尔洗衣机有限公司 洗涤设备的脱水方法及洗涤设备

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Publication number Publication date
CN1928210A (zh) 2007-03-14
KR100792237B1 (ko) 2008-01-07
CN1928210B (zh) 2010-10-20
EP1760181A1 (fr) 2007-03-07
KR20070025790A (ko) 2007-03-08

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