EP2692929A2 - Verfahren zur steuerung der dehydrierung in einer trommelwaschmaschine - Google Patents

Verfahren zur steuerung der dehydrierung in einer trommelwaschmaschine Download PDF

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Publication number
EP2692929A2
EP2692929A2 EP12765059.6A EP12765059A EP2692929A2 EP 2692929 A2 EP2692929 A2 EP 2692929A2 EP 12765059 A EP12765059 A EP 12765059A EP 2692929 A2 EP2692929 A2 EP 2692929A2
Authority
EP
European Patent Office
Prior art keywords
drum
spin
tub
unbalance value
washing machine
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Withdrawn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
EP12765059.6A
Other languages
English (en)
French (fr)
Other versions
EP2692929A4 (de
Inventor
Ui Kun Hwang
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.)
WiniaDaewoo Co Ltd
Original Assignee
Daewoo Electronics Co Ltd
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
Priority claimed from KR1020110027480A external-priority patent/KR20120109172A/ko
Priority claimed from KR1020110027479A external-priority patent/KR20120109171A/ko
Application filed by Daewoo Electronics Co Ltd filed Critical Daewoo Electronics Co Ltd
Publication of EP2692929A2 publication Critical patent/EP2692929A2/de
Publication of EP2692929A4 publication Critical patent/EP2692929A4/de
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • D06F2103/18—Washing liquid 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
    • 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
    • D06F2105/02—Water supply
    • 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
    • D06F2105/08—Draining of washing liquids
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • 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
    • D06F34/20—Parameters relating to constructional components, e.g. door sensors

Definitions

  • the present invention relates to a method for controlling dehydration in a drum washing machine, and more particularly, to a method for controlling dehydration in a drum washing machine, which repetitively measures an unbalance value at different speeds during a balance spin-drying process for spreading laundry items and before a main spin-drying process is performed in the drum washing machine, and senses an unbalance for forward and backward directions of the drum as well as an unbalance for rotational direction of the drum, thereby increasing spin-drying efficiency.
  • General washing machines may be divided into pulsator washing machines, agitator washing machines, and drum washing machines, depending on the washing method.
  • a rotatable pulsator at the bottom of a washing tub is rotated to generate a vortex of water, thereby spinning laundry items.
  • a washing rod known as an agitator in the center of a washing tub is regularly rotated, an agitating wing formed at the side of the washing rod forms a water flow. Then, as the water flows causes laundry items to come in frictional contact with the washing rod and the wall of the washing tub, the laundry items are washed.
  • a cylindrical drum having a plurality of water holes therein is horizontally installed in a tub.
  • a lifter within the drum lifts laundry items towards an upper space of the drum, and the lifted laundry items fall downward due to gravity.
  • Such a process is repeated to wash the laundry items.
  • damage to laundry items may be reduced, the laundry items may not get tangled, and a washing effect of beating and rubbing the laundry items may be achieved.
  • Such a washing machine washes laundry items while performing a washing process, a rinsing process, and a spin-drying process.
  • the washing process includes a water supply operation, a washing operation, and a drain operation, which are performed to remove stains in laundry items using wash water containing detergent therein.
  • the rinsing process includes a spin-drying operation, a water supply operation, a rinsing operation, and a drain operation, which are performed to rinse foam from the laundry items using clean wash water containing no detergent.
  • the spin-drying process includes a spin-drying operation which is performed to spin-dry the laundry items.
  • An aspect of the present invention provides a method for controlling dehydration in a drum washing machine, which repetitively measures an unbalance value at different speeds, for example during a balance spin-drying process for spreading laundry items and before a main spin-drying process is performed, and senses an unbalance for forward and backward directions of the drum as well as an unbalance for the rotational direction of the drum, thereby increasing spin-drying efficiency.
  • a method for controlling dehydration in a drum washing machine includes: simultaneously agitating and balance spin-drying laundry in the drum, then accelerating a motor of the washing machine to a laundry adherence speed; detecting a first unbalance value when the motor reaches the laundry adherence speed; accelerating the motor to a water removal speed according to the first unbalance value; detecting a second unbalance value when the motor reaches the water removal speed; and comparing the first unbalance value and the second unbalance value to obtain a comparison result, and performing main spin-drying according to the comparison result.
  • the motor When the first unbalance value is less than a preset value, the motor may be accelerated to the water removal speed, and when the first unbalance value is equal to or greater than the preset value, the method may continue or repeat the balance spin-drying process.
  • the main spin-drying process may be performed, and when the first unbalance value is greater than the second unbalance value, the method may repeat the balance spin-drying process.
  • Detecting the second unbalance value may include detecting a variation between forward and backward motions of a tub of the drum washing machine.
  • the main spin-drying process may be performed, and when the variation between forward and backward motions of the tub is equal to or greater than the preset variation, the method may repeat the balance spin-drying process.
  • the variation between the forward and backward motions of the tub may be measured using a distance from the tub by a distance measurement sensor on a rear surface of a front panel of the drum washing machine.
  • the variation between the forward and backward motions of the tub may be additionally or alternatively measured using a distance from a magnet attached to the tub by a Hall sensor on the rear surface of the front panel.
  • an unbalance value and forward and backward motions of the tub are measured at different speeds during the balance spin-drying process for spreading laundry items before the main spin-drying process is performed in the drum washing machine.
  • an unbalance for forward and backward directions of the drum as well as an unbalance for rotational direction of the drum may be sensed to uniformly distribute the laundry items. Therefore, vibration of the tub may be reduced during a spin-drying operation, which makes it possible to increase spin-drying efficiency.
  • FIG. 1 is a cross-sectional view schematically illustrating a drum washing machine in accordance with embodiment(s) of the present invention.
  • FIG. 1 illustrates a state in which water is supplied to a predetermined water level 15 in a tub 10 which surrounds a drum 11 housing laundry items 14 therein.
  • the drum 11 When the drum 11 is rotated, the laundry items 14 dipped in wash water are moved upward by the lifter(s) 12. Then, when the laundry items 14 reach a certain position, the laundry items 14 fall due to their own weight. Such a process is repeated to wash the laundry items 14.
  • a washing heater 13 for heating the wash water and/or laundry items is installed at the bottom of the drum 11, in order to improve washing capability and/or efficiency, and/or obtain an effect of boiling and/or washing the laundry.
  • FIG. 2 is a block configuration diagram illustrating a control circuit of the drum washing machine in accordance with embodiment(s) of the present invention.
  • the control circuit includes a load cell sensor 21, a water level sensor 29, a microcomputer, microcontroller or other logic circuit 20, a water supply controller 22, a drain controller 24, a motor driving controller 27, a washing heater 13, and a distance measurement sensor 30.
  • the load cell sensor 21 is configured to sense the weight of the laundry items 14 in the drum 11.
  • the water level sensor 29 is configured to sense the level of wash water within the tub 10.
  • the microcomputer 20 is configured to receive the values of the load cell sensor 21 and the water level sensor 29 and control the overall operations of the drum washing machine.
  • the water supply controller 22 is configured to control the operation of a water supply valve 23 according to a water supply control signal from the microcomputer 20.
  • the drain controller 24 is configured to control the operations of a drain valve 26 and/or a drain motor 25 according to a drain control signal from the microcomputer 20.
  • the motor driving controller 27 is configured to control the operation of a motor 28 for rotating the drum 11 according to a motor control signal from the microcomputer 20.
  • the distance measurement sensor 30 is configured to detect forward and backward motions of the tub 10.
  • the washing heater 13 serves to heat wash water according to a control signal from the microcomputer 20.
  • the load cell sensor 21 detects the weight of the laundry items 14 within the drum 11. The weight of the laundry items sensed by the load cell sensor 21 is input to the microcomputer 20.
  • the microcomputer 20 determines an amount of water to supply by referring to a memory table, and outputs a control command to the water supply controller 22 to open the water supply valve 23. Then, the water supply is started. While the water is supplied, the water level sensor 29 at one side of the tub 10 detects the level of water, and provides the detected water level to the microcomputer 20. Then, the microcomputer 20 determines whether or not the detected water level from the water level sensor 29 approaches or is at a preset water level. When the detected water level approaches or is at the preset water level, the water supply controller 22 stops the water supply valve 23 to stop the water supply.
  • the microcomputer 20 When the proper or predetermined amount of wash water corresponding to the weight of the laundry items 14 has been supplied to the tub 10 of the drum washing machine, the microcomputer 20 outputs a control signal to the motor driving controller 27 according to a washing operation program stored therein, thereby causing the motor 28 to rotate the drum 11.
  • a spin-drying operation using centrifugal force is performed by rotating the drum 11 at high speed, thereby removing at least some of the wash water in the laundry items 14.
  • the wash water removed from the laundry items 14 escapes to the tub 10 through a large number of holes formed in the circumference of the drum 11. Then, the drain valve 26 is opened and the drain motor 25 is operated to discharge the wash water outside of the washing machine.
  • a balance spin-drying process is performed to agitate the laundry items in a side-to-side direction, thereby spreading the laundry items. Then, the motor is accelerated at a predetermined speed so that the laundry items adhere on the inner wall of the drum, and a first unbalance value is detected. When the first unbalance value is equal to or less than a preset value, a main spin-drying process is performed.
  • FIG. 3A and 3B are diagrams illustrating states of laundry items put into the drum washing machine according to embodiment(s) of the present invention.
  • FIG. 4 is a diagram illustrating a state in which a Hall sensor is installed in the drum washing machine according to embodiment(s) of the present invention.
  • the laundry adherence speed refers to a speed at which the laundry items 14 adhere on the inner wall of the drum 11 and do not come off from the inner wall during a balance spin-drying process and may be set to 95RPM
  • a water removal speed refers to a speed at which foam and water contained in the laundry items 14 are removed before a main spin-drying process is performed and may be set to 180RPM.
  • the laundry items 14 may be uniformly distributed in the up and down and/or left and right sides of the drum 11, when seen from the front side.
  • the motor may be accelerated at the laundry adherence speed, and a first unbalance value is then detected during the balance spin-drying process.
  • the process for accelerating the motor to the water removal speed may be performed.
  • the method returns to the balance spin-drying process so as to spread the laundry items 14 more evenly.
  • the laundry items 14 may be uniformly distributed in the up and down and/or left and right sides of the drum 11 as illustrated in FIG. 3A , but may be concentrated in the front and/or rear sides of the drum 11.
  • the first unbalance value may be detected as a value less than preset value, because the laundry items 14 are uniformly distributed in the up and down and/or left and right sides of the drum 11. Then, the main spin-drying process may be performed.
  • the first unbalance value is detected at the laundry adherence speed. Then, when the first unbalance value is less than the preset value, the motor is accelerated to the water removal speed.
  • a second unbalance value is detected at the water removal speed, and compared to the first unbalance value.
  • the first unbalance value is equal to or smaller than the second unbalance value, the main spin-drying process is performed.
  • the second unbalance value at the water removal speed may comprise a variation between forward and backward motions of the tub 10.
  • the variation is smaller than a preset variation, the main spin-drying process is performed.
  • it is possible to prevent the vibration caused when the laundry is concentrated in the front and rear sides of the drum 11.
  • the variation between forward and backward motions of the tub 10 may be measured using a distance from the tub 10 by the distance measurement sensor 30 on a rear surface of a front panel 35.
  • the tub 10 moves in the direction(s) indicated by the double-headed arrow, the distance between the tub 10 and the rear surface of the front panel 35 repetitively decreases and increases. In this way, the variation between forward and backward motions of the tub 10 may be detected to determine an unbalance for the forward and backward directions.
  • the variation between forward and backward motions of the tub 10 may be detected by measuring a distance between a Hall sensor 40 on the rear surface of the front panel and a magnet 42 attached to the tub 10.
  • variation(s) between forward and backward motions of the tub 10 can be detected using the distance measurement sensor 30 and/or the Hall sensor 40.
  • the present invention is not limited thereto, and the variation(s) between forward and backward motions of the tub 10 may be measured or detected using various methods.
  • FIG. 5 is a flowchart for explaining a method for controlling dehydration or water removal in a drum washing machine according to one or more embodiments of the present invention.
  • FIG. 6 is a graph illustrating a spin-drying process of the drum washing machine according to embodiment(s) of the present invention.
  • the spin-drying control method for the drum washing machine is performed as follows. First, in order to perform a spin-drying operation after washing and rinsing operations are finished, a balance spin-drying process is performed.
  • the balance spin-drying process may comprise an agitating operation in which laundry items 14 are agitated in the side-to-side direction to spread the laundry items 14 at step S10.
  • the motor 28 is accelerated at the laundry adherence speed at step S20.
  • the laundry adherence speed refers to a speed at which the laundry items 14 adhere to the inner wall of the drum 11 without coming off from the inner wall of the drum 11.
  • the laundry adherence speed may be set to 95 RPM.
  • an unbalance caused by laundry items 14 concentrated in the up and down or left and right sides of the drum 11 may be detected.
  • the detected first unbalance value is compared to a preset value. When the first unbalance value is less than the preset value, it may be determined that the balance is maintained. Then, the method proceeds to steps S50 and S60 to accelerate the motor 28 to the water removal speed.
  • the procedure returns to step S10 to perform or repeat the balance spin-drying process.
  • the agitating operation is performed again to uniformly spread the laundry items 14.
  • the water removal speed refers to a speed at which foam and water contained in the laundry items 14 are removed before the main spin-drying process is performed.
  • the water removal speed may be set to 180 RPM.
  • the drum 28 When the drum 28 reaches the water removal speed, vibrations may occur in the forward and backward directions in the case where the laundry items 14 are concentrated in the front and/or rear sides of the drum 11. However, when damping of the damper 30 is not performed in a vertical direction, the second unbalance value may be detected as a smaller value than the first unbalance value, even though some vibration occurs.
  • the second unbalance value is detected as a larger value than the first unbalance value, as the damping of the damper 30 in the vertical direction increases due to the relatively high-speed rotation.
  • the first and second unbalance values may be compared to each other, in order to determine whether or not the vibration occurs in the forward and backward directions.
  • the laundry items 14 are not concentrated in the front and rear sides of the drum 11, but are relatively uniformly distributed, and the main spin-drying process is then performed at steps S90 and S100.
  • the method returns to step S10 to perform the balance spin-drying process.
  • the agitating operation is performed again to uniformly spread the laundry items 14.
  • the procedure may return to step S10 to perform the balance spin-drying process.
  • FIG. 7 is a flowchart for explaining a method for controlling dehydration or water removal in a drum washing machine according to another embodiment of the present invention.
  • a variation between forward and backward motions of the tub is detected as the second unbalance value detected at the water removal speed.
  • a main spin-drying process is performed, and when the variation between forward and backward motions is equal to or greater than the preset variation, the procedure returns to perform a balance spin-drying process.
  • the spin-drying control method for the drum washing machine is performed as follows. First, after washing and rinsing operations are finished, the balance spin-drying process is performed. First, an agitating operation for agitating the laundry items 14 in the side-to-side direction to spread the laundry items 14 is conducted at step S110.
  • the motor 28 is accelerated to the laundry adherence speed at step S120.
  • the laundry adherence speed refers to a speed at which the laundry items 14 adhere to the inner wall of the drum 11 and do not come off the inner wall of the drum 11, and may be set to 95 RPM.
  • an unbalance caused by the laundry items 14 concentrated in the up and down and/or left and right sides of the drum 11 may be detected.
  • the detected first unbalance value is compared to the preset value. When the first unbalance value is less than the preset value, it is determined that the balance is maintained, and the motor 28 is accelerated to the water removal speed, at steps S150 and S160.
  • the procedure returns to step S10 to perform the balance spin-drying process.
  • the agitating operation is performed again to uniformly spread the laundry items 14.
  • the water removal speed refers to a speed at which foam and water in the laundry items 14 are removed before the main spin-drying process is performed.
  • the water removal speed may be set to 180 RPM.
  • the variation between forward and backward motions of the tub 10 may be measured through a distance from the tub 10 by the distance measurement sensor 30 on the rear surface of the front panel 35.
  • the variation between forward and backward motions of the tub 10 may be measured through a distance from the magnet 42 attached to the tub 10 by the Hall sensor 40 on the rear surface of the front panel 35.
  • the agitating operation is performed again to uniformly spread the laundry items 14.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP12765059.6A 2011-03-28 2012-03-27 Verfahren zur steuerung der dehydrierung in einer trommelwaschmaschine Withdrawn EP2692929A4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020110027480A KR20120109172A (ko) 2011-03-28 2011-03-28 드럼세탁기의 탈수 제어방법
KR1020110027479A KR20120109171A (ko) 2011-03-28 2011-03-28 드럼세탁기의 탈수 제어방법
PCT/KR2012/002210 WO2012134139A2 (ko) 2011-03-28 2012-03-27 드럼세탁기의 탈수 제어방법

Publications (2)

Publication Number Publication Date
EP2692929A2 true EP2692929A2 (de) 2014-02-05
EP2692929A4 EP2692929A4 (de) 2015-04-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12765059.6A Withdrawn EP2692929A4 (de) 2011-03-28 2012-03-27 Verfahren zur steuerung der dehydrierung in einer trommelwaschmaschine

Country Status (4)

Country Link
US (1) US20140021140A1 (de)
EP (1) EP2692929A4 (de)
CN (1) CN103443348A (de)
WO (1) WO2012134139A2 (de)

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CN104131439A (zh) * 2014-07-31 2014-11-05 江苏新安电器有限公司 一种基于滚筒洗衣机的光学防撞筒检测系统及其检测方法
KR20160034611A (ko) * 2014-09-22 2016-03-30 동부대우전자 주식회사 세탁 장치 및 이를 이용한 세탁 방법
CN104963163B (zh) * 2015-06-04 2018-03-13 无锡小天鹅股份有限公司 洗衣机的控制方法和洗衣机
KR101757303B1 (ko) 2016-05-31 2017-07-12 엘지전자 주식회사 의류처리장치의 제어방법
JP6964431B2 (ja) * 2017-04-19 2021-11-10 日立グローバルライフソリューションズ株式会社 ドラム式洗濯機及びドラム式洗濯乾燥機
US20190055686A1 (en) * 2017-08-21 2019-02-21 Haier Us Appliance Solutions, Inc. Washing machine appliances and methods for operation
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WO2015126166A1 (ko) * 2014-02-19 2015-08-27 엘지전자 주식회사 세탁방법
CN106232889A (zh) * 2014-02-19 2016-12-14 Lg电子株式会社 洗涤方法
CN106232889B (zh) * 2014-02-19 2019-11-05 Lg电子株式会社 洗涤方法
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Publication number Publication date
WO2012134139A2 (ko) 2012-10-04
WO2012134139A3 (ko) 2013-01-10
US20140021140A1 (en) 2014-01-23
EP2692929A4 (de) 2015-04-08
CN103443348A (zh) 2013-12-11

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