US20050188473A1 - Washing machine and method for controlling the same - Google Patents

Washing machine and method for controlling the same Download PDF

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Publication number
US20050188473A1
US20050188473A1 US10/999,099 US99909904A US2005188473A1 US 20050188473 A1 US20050188473 A1 US 20050188473A1 US 99909904 A US99909904 A US 99909904A US 2005188473 A1 US2005188473 A1 US 2005188473A1
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United States
Prior art keywords
rotation speed
drum
resonance
washing machine
control unit
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
US10/999,099
Other languages
English (en)
Inventor
Kweon Son
Yang No
Jung Kang
Hyo Choi
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
Priority claimed from KR1020040013268A external-priority patent/KR100672567B1/ko
Priority claimed from KR1020040013269A external-priority patent/KR100662332B1/ko
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: CHOI, HYO SIK, KANG, JUNG HOON, NO, YANG HWAN, SON, KWEON
Publication of US20050188473A1 publication Critical patent/US20050188473A1/en
Priority to US12/320,127 priority Critical patent/US20090165218A1/en
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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/02—Characteristics of laundry or load
    • D06F2101/06—Type or material
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/10—Spin speed
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/20—Operation modes, e.g. delicate laundry washing programs, service modes or refreshment cycles
    • 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
    • D06F2105/58—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
    • 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
    • D06F2105/60—Audible signals
    • 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
    • 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
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress

Definitions

  • the present invention relates to washing machines, and more particularly, to method and device for preventing resonance from occurring in spinning of a washing machine.
  • the washing machine washes laundry by softening action of detergent, and friction of the laundry with water circulation caused by rotation of a pulsator or drum.
  • demands for drum type washing machines increases day by day, which can reduce an entire height compared to a pulsator type washing machine, and prevent wrinkles from forming.
  • FIG. 1 illustrates a section of a related art drum type washing machine.
  • the related art drum type washing machine is provided with a tub 3 inside of a cabinet 5 which forms an outer appearance of the drum type washing machine, and a drum 9 rotatably mounted on an inside of the tub 3 .
  • the cabinet 5 has a door 1 on a front for introduction of laundry, with a gasket 2 between the door 1 and the tub 3 .
  • the tub 3 has springs 4 each with one end secured to an upper outside circumference thereof and the other end secured to the cabinet 5 , and a friction damper 10 thereunder for damping vibration.
  • the motor 6 is provided with a stator 7 and a rotor 8 , wherein the stator 7 is mounted to the rear surface of the tub 3 , and the rotor 8 is fixed to the rotation shaft 13 . Therefore, when the rotor 8 rotates, the drum 9 connected to the rotor 8 rotates at the same time.
  • a sensor (not shown) at one side of the motor 6 for detecting a rotation speed of the rotor 8 , and on an upper portion of a front surface of the cabinet 5 , there is a control panel having various buttons for controlling operation of the washing machine.
  • the rotation speed of the motor 6 is increased gradually until the rotation speed reaches to a preset speed when the preset speed is maintained for a preset time period.
  • the rotation speed may vary with an extent of eccentricity of the laundry. That is, if the eccentricity of the laundry is great, the rotation speed of the drum 9 drops, or the rotation shaft 13 suffers from damage. Therefore, it is required to measure the eccentricity before the spinning of the washing machine starts.
  • the heavy vibration and noise gives a feeling of inconvenience significantly in measuring the eccentricity of the laundry or in spinning the laundry, or damages the laundry. Moreover, the heavy vibration and noise drops reliability of user on the product.
  • the present invention is directed to a washing machine, and a method for controlling the same that substantially obviates one or more problems due to limitations and disadvantages of the related art.
  • An object of the present invention is to provide a washing machine for preventing resonance from occurring during spinning of the washing machine, and a method for controlling the same.
  • a method for controlling a washing machine having a drum of which rotation speed is adjustable includes a first step for rotating the drum at a first rotation speed set at control unit, a second step for detecting whether resonance occurs or not at the drum rotating at the first rotation speed, and a third step for changing the rotation speed of the drum if the resonance is detected at the drum.
  • the third step includes the step of storing the changed rotation speed in the control unit.
  • the drum is rotated at the changed rotation speed when the washing machine is put into operation again after the washing machine is stopped.
  • the third step further includes the step of measuring eccentricity of laundry held in the drum rotating at the changed rotation speed.
  • the step of decreasing the rotation speed of the drum again after increasing the rotation speed of the drum is repeated, if the eccentricity is greater than a preset value.
  • the drum may be rotated in regular/reverse directions alternately for a plurality of times, if the eccentricity exceeds a preset value.
  • the third step further includes the steps of rotating the drum at the set second rotation speed for extracting water from the laundry, detecting whether the resonance occurs at the drum rotating at the second rotation speed or not, changing the rotation speed of the drum, if the resonance is detected at the drum, and storing the changed rotation speed in the control unit.
  • the method further includes the step of measuring the eccentricity of the laundry held in the drum, if no resonance occurs in the second step.
  • the step of decreasing the rotation speed of the drum again after increasing the rotation speed of the drum is repeated, if the eccentricity is greater than a preset value.
  • the drum is rotated in regular/reverse directions alternately for a plurality of times, if the eccentricity exceeds a preset value.
  • the eccentricity is below the preset value, further includes the steps of rotating the drum at the set second rotation speed for extracting water from the laundry, detecting whether the resonance occurs at the drum rotating at the second rotation speed or not, changing the rotation speed of the drum, if the resonance is detected at the drum, and storing the changed rotation speed in the control unit.
  • the rotation speed of the drum increases in the third step.
  • the rotation speed of the drum decreases in the third step.
  • the rotation speed of the drum changes by predetermined magnitudes each greater than 50 rpm in the third step.
  • the resonance of the drum is detected by a resonance detecting device automatically in the second step.
  • the third step is performed automatically by the control unit which receives a signal from the resonance detecting device.
  • the second step includes the step of sounding alarm through a speaker if the resonance of the drum is detected.
  • the steps are performed in a state a test mode is selected.
  • a method for controlling a washing machine having a drum of which rotation speed is adjustable for extracting water from laundry includes a first step for rotating the drum at a second rotation speed set at a control unit, a second step for increasing the rotation speed from the second rotation speed by predetermined magnitudes of rpm in succession, and whether resonance occurs or not at every rotation speed section is detected, a third step for changing the rotation speed of the drum when resonance of the drum is detected, and a fourth step for storing the changed rotation speed in the control unit.
  • the first step includes the steps of selecting one of course relevant to a kind of laundry, and rotating the drum at the second rotation speed for the selected course.
  • the rotation speed of the drum increases in the third step.
  • the rotation speed of the drum may decrease in the third step.
  • the rotation speed of the drum changes by predetermined magnitudes each greater than 50 rpm in the third step.
  • the steps are performed in a state a test mode is selected.
  • the drum is rotated at the changed rotation speed when the washing machine is put into operation again after the test mode is finished.
  • the fourth step includes the step of sounding an alarm from a speaker when the changed rotation speed is stored.
  • the third step is performed automatically by the control unit having the signal received from a resonance detecting device.
  • the second step includes the step of automatic detection of resonance occurrence at the drum by the resonance detecting device.
  • the second step further includes the step of storing a preset maximum rotation speed in the control unit in a case no resonance occurs until the drum rotates up to the preset maximum speed.
  • the second step further includes the step of sounding an alarm from a speaker if the resonance of the drum is detected.
  • a washing machine in another aspect of the present invention, includes a motor for generating rotating force, a drum for being rotated upon receiving driving force from the motor, a sensor for sensing rotation speed of the drum, a vibration detecting device for transmitting a signal if vibration greater than a preset value is detected at the drum, and a control unit for adjusting the rotation speed of the motor to prevent the resonance of the drum from occurring upon reception of the signal.
  • the washing machine further includes a rotary key electrically connected to the control unit for a user to turn to change the rotation speed of the drum.
  • the washing machine further includes a selection button connected to the control unit for selecting a course for a kind of laundry.
  • the washing machine further includes a storage button connected to the control unit for storing an adjusted rotation speed.
  • the washing machine further includes a test mode button connected to the control unit for performing a test mode to search a rotation speed at which the resonance of the drum occurs.
  • the washing machine further includes a speaker connected to the control unit for sounding an alarm when a working rotation speed is stored.
  • the washing machine further includes a display for displaying a rotation speed of the drum sensed at the sensor.
  • FIG. 1 illustrates a section of a related art drum type washing machine
  • FIG. 2A illustrates a frontal perspective view of a washing machine
  • FIG. 2B illustrates a graph showing variation of rotation speed during progress of spinning of a washing machine
  • FIGS. 3 A ⁇ 3 C illustrate control systems of a washing machine in accordance with preferred embodiments of the present invention
  • FIG. 4 illustrates a flow chart showing the steps of a method for controlling spinning of a washing machine of the present invention
  • FIG. 5 illustrates a flow chart showing the steps of a method for controlling spinning of a washing machine in accordance with a preferred embodiment of the present invention.
  • FIG. 6 illustrates a flow chart showing a method for controlling spinning of a washing machine in accordance with another preferred embodiment of the present invention.
  • Embodiments of the washing machine of the present invention will be described with reference to FIGS. 2 A ⁇ 6 .
  • FIG. 2A illustrates a perspective view of a washing machine, having a control panel 100 on a front.
  • the control panel 100 includes various buttons, a rotary key 200 , and a display 300 .
  • the rotary keys 200 and buttons are connected to a control unit 103 . As the user rotates the rotary key 200 , rotation speeds of the motor and the drum are adjusted.
  • the buttons include a selection button 101 , and a storage button 102 .
  • the selection button 101 is provided for selecting one of courses operative in various speeds depending on kinds of laundry, and the storage button 102 is provided to store the adjusted speed in the control unit.
  • a test mode button 110 is provided additionally, for selecting a test mode in which the rotation speed is set separately to avoid the resonance of the drum.
  • FIG. 2B illustrates a graph showing variation of rotation speed during progress of spinning of a washing machine.
  • the spinning step of the washing machine includes an eccentricity detecting step, additionally. That is, in the spinning step, the eccentricity of the laundry and a foam quantity are detected. It is preferable that the detection of the eccentricity is performed at a rotation speed in the vicinity of 108 rpm at which the laundry starts to be in close contact with an inside surface of the drum.
  • the eccentricity is detected by detecting variation of the rotation speed.
  • the eccentricity is small when the rotation speed of the drum is uniform, and the eccentricity is great if the rotation speed of the drum varies sharply and periodically.
  • the eccentricity is detected, and corrected before performing the spinning step.
  • the spinning of the drum in a state the eccentricity of the laundry is great might give damage to the drum and the rotation shaft.
  • FIGS. 3 A ⁇ 3 C illustrate control systems of a washing machine in accordance with preferred embodiments of the present invention.
  • the washing machine includes a control unit, a motor 104 , a sensor 105 , a selection button 101 , a storage button 102 , a rotary key 200 , a display 300 , and a speaker 400 .
  • the selection button 101 is connected to the control unit 103 , for selecting an operation of desired course according to a kind of laundry. Therefore, if one of courses is selected with the selection button 101 , the motor 104 rotates at a rotation speed set to meet a course requirement.
  • the rotation speed of the motor 104 is measured at the sensor 105 , and provided to the control unit 103 , and displayed on the display 300 .
  • the rotary key 200 is provided for the user to change the rotation speed.
  • the user turns the rotary key 200 to adjust the rotation speed, and presses the storage button 102 , to store the adjusted rotation speed in the control unit 103 .
  • the washing machine further includes the speaker 400 connected to the control unit 103 , so that the speaker 400 sounds an alarm when the resonance of the drum is detected, or the adjusted rotation speed is stored.
  • the washing machine can detect the resonance at the drum by means of a resonance detecting device 150 , automatically.
  • the resonance detecting device 150 includes a spring and a grounding part. If the spring vibrates more than a preset level, the spring comes into contact with the grounding part, when a signal indicating that the resonance is occurred is generated.
  • the resonance detecting device 150 provides the signal that the resonance occurs to the control unit 103 in a case a vibration value exceeds a preset value.
  • the control unit 103 having received the signal adjusts the rotation speed of the drum, automatically.
  • the adjustment of the rotation speed may be made by the user manually by turning the rotary key.
  • the speaker 400 connected to the control unit 103 sounds alarm when resonance of the drum is detected, or the adjusted rotation speed is stored. It is preferable that the adjusted rotation speed is stored automatically by the control unit 103 .
  • the washing machine further includes test mode buttons 110 connected to the control unit 103 .
  • the step of adjusting the rotation speed for avoiding the resonance of the drum is made before a regular spinning operation of the washing machine. Therefore, the step of adjusting the rotation speed is performed after the user selects the test mode button 110 .
  • the adjusted rotation speed is stored in the control unit before the test mode is finished.
  • the drum rotates at the adjusted rotation speed.
  • FIG. 4 illustrates a flow chart showing the steps of a method for controlling spinning of a washing machine of the present invention.
  • a method for controlling a washing machine of the present invention will be described, with reference to FIG. 4 .
  • the drum is rotated at a first rotation speed set at the control unit (S 1 ).
  • the first rotation speed is in the vicinity of 108 rpm.
  • the detection of the eccentricity is made in a state no resonance occurs at the drum.
  • the rotation speed is increased or decreased, by a preset unit greater than 50 rpm. This is, since a resonance range of the drum varies a certain level with a small variation of the eccentricity of the laundry, for changing the rotation speed of the drum greater than a variation range. That is, for securer avoidance of the resonance occurrence, the rotation speed is changed by predetermined magnitudes each greater than a certain rpm.
  • the resonance detecting device even if the user can know the occurrence of resonance at the drum from sudden increase of vibration and noise in the step (S 2 ) of detecting resonance of the drum, it is preferable that the occurrence of resonance is detected automatically by the resonance detecting device.
  • the resonance detecting device provides the signal that the resonance is occurred to the control unit, automatically. It is preferable that the rotation speed is changed by the control unit which received the signal for avoiding the resonance, and the changed rotation speed is stored in the control unit as a new first rotation speed. Accordingly, when the washing machine is put into operation again after the washing machine is stopped, the drum is controlled to rotate at the changed rotation speed.
  • a step (S 5 ) for measuring eccentricity of the laundry held in the drum is performed.
  • a step for decreasing the rotation speed of the drum after increasing the rotation speed of the drum is repeated. That is, by repeating the step of varying the rotation speed, the laundry is made to be spread evenly on an inside surface of the drum, by which the eccentricity of the laundry is corrected to an appropriate level.
  • the drum may be rotated in regular/reverse directions alternately for a plurality of times.
  • the eccentricity is corrected to a value below the preset level, or the detected eccentricity is below the present level, the rotation speed of the drum is increased, to progress the spinning.
  • the step of decreasing the rotation speed of the drum after increasing the rotation speed of the drum is repeated, or the drum is rotated in regular/reverse directions alternately for a plurality of times.
  • step (SA) for changing the rotation speed for avoiding the resonance, and the detection (S 5 , and S 6 ) of eccentricity of the laundry are performed in a state the test mode is selected.
  • FIG. 5 illustrates a flow chart showing the steps of a method for controlling spinning of a washing machine in accordance with a preferred embodiment of the present invention.
  • the drum is rotated at a constant speed of a preset second rotation speed for extraction of water from the laundry (S 7 ).
  • the second rotation speeds corresponding to kinds of laundry are set at the control unit. Therefore, once a desired course is selected by the user by pressing the selection button according to kind of the laundry initially, the drum is rotated at the second rotation speed of the selected course. It is preferable that the second rotation speed is higher than 600 rpm for smooth extraction of water from the laundry.
  • a step is further performed, for detecting a volume of foam inside of the drum while rotating the drum at a constant speed of a third rotation speed (W 12 ) before the rotation speed is increased from the first rotation speed WI to the second rotation speed W 2 .
  • the change of the rotation speed is made by predetermined magnitudes each greater than 50 rpm. This is for changing the rotation speed of the drum greater than a change range of a resonance range of the drum caused by a minute change of the eccentricity of the laundry.
  • the rotation speed change for avoidance of the resonance is made in a state the test mode is selected. After finish of the rotation speed change, the test mode is finished automatically, and, then, the spinning step proceeds for a preset time period by spinning the drum.
  • the rotation speed is changed by turning the rotary key, or automatically by the control unit. Then, the rotation speed is changed to 650 rpm, and stored in the control unit. Thereafter, when the test mode is finished, and the washing machine is put into operation again, the drum performs the spinning at the 650 rpm which is newly stored second rotation speed.
  • the rotation speed of the drum is displayed on the display 300 , wherein, even if the spinning is progressed at 650 rpm actually, it is preferable that the rotation speed is displayed on the display as 700 rpm as set initially. That is, at a time the washing machine is put into operation again after the washing machine is stopped, not the changed rotation speed, but the second rotation speed set initially is displayed on the display 300 . This is for preventing the user from confusing on the rotation speed.
  • the display may display the changed rotation speed and the initially set second rotation speed alternately at regular time intervals.
  • FIG. 6 illustrates a flow chart showing a method for controlling spinning of a washing machine in accordance with another preferred embodiment of the present invention.
  • a method for controlling a washing machine will be described with reference to FIG. 6 , in which a rotation speed of a drum is controlled for extraction of water from laundry.
  • the drum is rotated at the second rotation speed set at the control unit (S 12 ).
  • the spinning step it is preferable that the second rotation speed is set different from each other according to kinds of laundry.
  • the spinning step further includes a step for selecting one of courses corresponding to a kind of the laundry, and a step for rotating the drum at a second rotation speed relevant to the selected course.
  • second rotation speeds are set at the control unit for various kinds of laundry, such as lingerie, blue jeans, general clothes, and blanket, respectively. Therefore, once the user selects a desired course by pressing the selection button according to kind of the laundry, the drum is rotated at the second rotation speed of the selected course.
  • the rotation speed is increased in succession by predetermined magnitude of rpm from the second rotation speed (S 15 , and S 17 ), and whether the resonance occurs at the drum or not is detected at every rotation speed section (S 14 , S 16 , and S 18 ). It is preferable that the predetermined magnitude of rpm is 50 rpm or 100 rpm.
  • the rotation speed of the drum is changed (S 20 ), and if no resonance is detected, after the rotation speed is increased by predetermined magnitudes of rpm, whether the resonance occurs or not is detected, again.
  • the drum rotates at 500 rpm which is initially set second rotation speed. If no resonance occurs, the rotation speed is increased to 600 rpm. If the resonance occurs at the increased rotation speed, the rotation speed is decreased to 650 rpm or increased to 700 rpm.
  • the rotation speed of the drum is increased or decreased, preferably by predetermined magnitudes each greater than 50 rpm. According to this, occurrence of the resonance at the changed rotation speed can be prevented, securely.
  • the rotation speed is adjusted for preventing occurrence of the resonance at the drum, and the adjusted rotation speed is stored in the control unit. If the resonance of the drum is detected, an alarm sounds form the speaker, by which the user can know occurrence of the resonance, easily.
  • control unit has a maximum rotation speed set therein, and, in a case no resonance occurs until the drum rotates up to the set maximum rotation speed, the maximum speed is stored in the control unit.
  • the detection of resonance at the drum S 14 , S 16 , and S 18 , the change of the rotation speed S 20 , and the storage of the changed rotation speed S 21 are performed in a state the test mode is selected S 21 .
  • the changed rotation speed is stored as a newly set second rotation speed in the control unit, when the washing machine is put into operation again after the test mode is finished, the drum is rotated at the changed rotation speed directly, instead of increasing the rotation speed gradually.
  • an alarm sounds from the speaker when the changed rotation speed is stored in the control unit, and the storage of the change rotation speed is performed automatically by the control unit in response to the signal from the resonance detecting device.
  • the occurrence of the resonance at the drum is detected by the resonance detecting device, automatically.
  • the washing machine is provided with a reset button for returning the rotation speed to the initialed set second rotation speed, for making the next operation by the user in performing the test mode easy.
  • the washing machine and the method for controlling the same have the following advantages.
  • the method for controlling a washing machine of the present invention permits more accurate measurement of an eccentricity by detecting resonance and adjusting the rotation speed in measuring eccentricity of the laundry held in the drum.
  • the detection of resonance at a rotation speed of the drum and adjustment of the rotation speed to avoid the resonance in the spinning step permits to enhance reliability of the product.
  • the foregoing method for controlling spinning in a washing machine is applicable not only to the drum type washing machine, but also other general washing machines, such as a pulsator type washing machine.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
US10/999,099 2004-02-27 2004-11-30 Washing machine and method for controlling the same Abandoned US20050188473A1 (en)

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Application Number Priority Date Filing Date Title
US12/320,127 US20090165218A1 (en) 2004-02-27 2009-01-16 Washing machine and method for controlling the same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KRP2004-13268 2004-02-27
KR1020040013268A KR100672567B1 (ko) 2004-02-27 2004-02-27 세탁기의 탈수제어방법 및 조절장치
KRP2004-13269 2004-02-27
KR1020040013269A KR100662332B1 (ko) 2004-02-27 2004-02-27 공진회피를 위한 세탁기의 ｒｐｍ 조절방법 및 조절장치

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US12/320,127 Abandoned US20090165218A1 (en) 2004-02-27 2009-01-16 Washing machine and method for controlling the same

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EP (1) EP1568813B1 (zh)
CN (1) CN1661156B (zh)
AU (1) AU2004231244B2 (zh)
ES (1) ES2401961T3 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070124871A1 (en) * 2005-08-01 2007-06-07 Lg Electronics Inc. Control method for spinning cycle in washing machine
US20090241605A1 (en) * 2008-03-28 2009-10-01 Electrolux Home Products, Inc. Laundering Device Vibration Control
US8863558B2 (en) 2012-07-10 2014-10-21 Whirlpool Corporation Laundry treating appliance and method of operation
US20150240406A1 (en) * 2014-02-21 2015-08-27 Samsung Electronics Co., Ltd. Washing machine with ball balancer and method of controlling vibration reduction thereof
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US20090165218A1 (en) 2009-07-02
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