EP3808886A1 - Procédé de commande de machine à laver - Google Patents

Procédé de commande de machine à laver Download PDF

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Publication number
EP3808886A1
EP3808886A1 EP20190801.9A EP20190801A EP3808886A1 EP 3808886 A1 EP3808886 A1 EP 3808886A1 EP 20190801 A EP20190801 A EP 20190801A EP 3808886 A1 EP3808886 A1 EP 3808886A1
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EP
European Patent Office
Prior art keywords
laundry
weight
spin
drying
measuring
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.)
Granted
Application number
EP20190801.9A
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German (de)
English (en)
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EP3808886B1 (fr
Inventor
Baekeun Kwon
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LG Electronics Inc
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LG Electronics Inc
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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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/52—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/60—Control of the 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/52—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or weight
    • 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
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2105/48—Drum 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/62—Stopping or disabling machine operation
    • 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 
    • D06F33/44—Control of the operating time, e.g. reduction of overall operating time
    • 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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/007—Methods for washing, rinsing or spin-drying for spin-drying only

Definitions

  • the present disclosure relates to a method for controlling a washing machine, and, more particularly, to a method for controlling a washing machine that spin-dries laundry that has been washed.
  • Korean Patent Application Publication No. 10-2000-0025011 published on May 06, 2000; hereinafter referred to as "related art 1"
  • a weight W1 of dry laundry is obtained by performing a first weight detection at a beginning of washing. After the first weight detection is performed, washing and rinsing is performed. Then, a weight W2 of the laundry is obtained by performing a second weight detection prior to spin-drying.
  • a type of the laundry is recognized based on W2/W1.
  • W2/W1 ⁇ K1 the laundry is determined to be chemical fiber-based laundry.
  • a spin-drying time is set to 5 minutes or less based on a result of the determination.
  • K1 ⁇ W2/W1 ⁇ K2 chemical fiber-based laundry and natural fiber-based laundry are determined to be mixed.
  • the spin-drying time is set to between 5 and 9 minutes based on a result of the determination.
  • K2 ⁇ W2/W1 the laundry is determined to be natural fiber-based laundry.
  • the spin-drying time is set to 9 minutes or more based on a result of the determination.
  • a proper spin-drying time may be calculated according to a type of laundry, such as chemical fiber-type laundry, natural fiber-type laundry, and blended fiber-type laundry. Accordingly, the laundry may not be damaged, or may be spin-dried properly.
  • the electric dryer requires a long drying time. In particular, when an atmospheric temperature is low, the drying time becomes longer. In order to reduce the drying time, as much moisture as possible should be removed from laundry before loading the laundry into the electric dryer.
  • the present disclosure is directed to providing a method for controlling a washing machine that is capable of accurately recognizing laundry.
  • the present disclosure is further directed to a method for controlling a washing machine that may cause laundry to be spin-dried to a certain degree of spin-drying.
  • the present disclosure is still further directed to providing a method for controlling a washing machine that is capable of facilitating use of a dryer after spin-drying is finished.
  • the present disclosure is still further directed to providing a method for controlling a washing machine that allows a user to predict a natural drying time for spin-dried laundry.
  • a weight sensor measures a weight of the laundry, and spin-drying of the laundry is ended based on a weight measurement value obtained as a result of the measurement.
  • the washing machine may include a washing tub, an outer tub, the driver, a suspension bar, and the weight sensor.
  • the outer tub may be configured to accommodate the washing tub.
  • the laundry may be loaded into the washing tub.
  • the driver may be configured to rotate the washing tub.
  • the suspension bar may be configured to suspend the outer tub.
  • the weight sensor may be configured to detect the weight of the laundry.
  • the weight sensor may be installed on the suspension bar.
  • the weight sensor may measure the weight of the laundry while the driver is rotating the washing tub constantly at a first speed to spin-dry the laundry.
  • the weight sensor may measure the weight of the laundry multiple times.
  • the spin-drying of the laundry may be ended based on a reduction rate of the weight measurement value being less than a first reference value.
  • a weight of dry laundry may be measured before the laundry is washed.
  • the spin-drying of the laundry may be ended based on the reduction rate of the weight measurement value being less than the first reference value and a ratio of the weight measurement value to the weight of the dry laundry being less than or equal to a second reference value.
  • the first speed may be set to be inversely proportional to the weight of the laundry.
  • the first speed may be adjusted according to the weight measurement value.
  • the laundry may be spin-dried to a certain degree of spin-drying even when new laundry is added or some of the previously loaded laundry is removed just before the spin-drying starts.
  • the laundry may be spin-dried to the certain degree of spin-drying regardless of a degree to which the laundry gets inter-tangled or inclined to a certain side.
  • a weight of wet laundry may be measured before the laundry is spin-dried.
  • the spin-drying of the laundry may be ended based on the reduction rate of the weight measurement value being less than the first reference value and a ratio of a reduction amount of the weight measurement value to the weight of the wet laundry being less than a third reference value.
  • the first speed may be set to be inversely proportional to the weight of the laundry.
  • the first speed may be adjusted according to the weight measurement value.
  • the laundry may be spin-dried to the certain degree of spin-drying even when new laundry is added or some of the previously loaded laundry is removed just before the spin-drying starts.
  • the laundry may be spin-dried to the certain degree of spin-drying regardless of the degree to which the laundry gets inter-tangled or inclined to the certain side.
  • the weight of the dry laundry may be measured before the laundry is washed.
  • the spin-drying of the laundry may be ended based on the ratio of the weight measurement value to the weight of the dry laundry being less than or equal to the second reference value.
  • the weight of the wet laundry may be measured before the laundry is spin-dried.
  • the spin-drying of the laundry may be ended based on the ratio of the reduction amount of the weight measurement value to the weight of the wet laundry being less than the third reference value.
  • the weight of the dry laundry may be measured before the laundry is washed.
  • the weight of the spin-dried laundry is measured, and then first information may be transmitted to a terminal or a dryer of a user.
  • the user may predict a natural drying time for the spin-dried laundry.
  • the dryer may be conveniently used and the use time of the dryer may be shortened.
  • the first information may include a ratio of the weight of the spin-dried laundry to the weight of the dry laundry.
  • the weight of the wet laundry may be measured before the laundry is spin-dried.
  • the weight of the spin-dried laundry is measured, and then second information may be transmitted to the terminal or the dryer of the user.
  • the user may predict a natural drying time for the spin-dried laundry.
  • the dryer may be conveniently used and the use time of the dryer may be shortened.
  • the second information may include the ratio of the weight of the spin-dried laundry to the weight of the wet laundry.
  • the weight sensor may measure the weight of the laundry multiple times.
  • the spin-drying of the laundry may be ended after the washing tub is rotated at a maximum spin-drying rotation speed.
  • the maximum spin-drying rotation speed may be set to be inversely proportional to the reduction rate of the weight measurement value.
  • the laundry may be spin-dried to the certain degree of spin-drying even when new laundry is added or some of the previously loaded laundry is removed just before the spin-drying starts.
  • the laundry may be spin-dried to the certain degree of spin-drying regardless of the degree to which the laundry gets inter-tangled or inclined to the certain side.
  • the weight sensor may measure the weight of the laundry multiple times.
  • a fabric quality of the laundry may be determined based on the reduction rate of the weight measurement value.
  • the accuracy in recognizing the laundry may be improved without installing additional devices necessary for recognizing the laundry.
  • the weight sensor measures the weight of the laundry, and spin-drying of the laundry is ended based on a weight measurement value obtained as a result of the measurement, the accuracy in recognizing the laundry may be improved without installing additional devices necessary for recognizing the laundry.
  • the laundry since the spin-drying of the laundry is ended based on the reduction rate of the weight measurement value being less than the first reference value, the laundry may be spin-dried to the certain degree of spin-drying even when new laundry is added or some previously loaded laundry is removed just before the spin-drying starts. In addition, the laundry may be spin-dried to the certain degree of spin-drying regardless of the degree to which the laundry gets inter-tangled or inclined to the certain side.
  • the dryer since, when the spin-drying of the laundry is ended, the weight of the spin-dried laundry is measured and then the first information or the second information is transmitted to the dryer, the dryer may be conveniently used and the use time of the dryer after the spin-drying is finished may be shortened.
  • the user since, when the spin-drying of the laundry is ended, the weight of the spin-dried laundry is measured and then the first information or the second information is transmitted to the terminal of the user, the user may numerically confirm a spin-drying completion time, thereby predicting a natural drying time for the spin-dried laundry.
  • FIG. 1 is a cross-sectional view illustrating a top loader washing machine 10.
  • the top loader washing machine 10 includes a case 11, an outer tub 12, an inner tub (washing tub) 13, a pulsator 14, a driver 15, a suspension bar 16, and a weight sensor 17.
  • the washing tub 13, into which laundry is loaded, is located inside the outer tub 12.
  • the driver 15 is configured to rotate the washing tub 13.
  • the suspension bar 16 is configured to suspend the outer tub 12.
  • the weight sensor 17 configured to detect a weight of the laundry is installed on the suspension bar 16.
  • the weight sensor 17 is provided as a load cell.
  • the load cell may be manufactured using a strain gauge.
  • the suspension bar 16 which suspends the outer tub 12 and the weight sensor 17 installed on the suspension bar 16 are well-known technologies, so a detailed description thereof will be omitted.
  • a drain pump 19 configured to discharge the water to the outside is installed on the drain passage 18.
  • the drain passage 18 is opened or closed by a drain valve 20.
  • a method for controlling a washing machine (S100, S200, S300, S400) according to an embodiment of the present disclosure, as described below, may be set in a controller (not shown) of the top loader washing machine 10.
  • FIG. 2 is a flow chart illustrating a method for controlling a washing machine, according to a first embodiment of the present disclosure.
  • FIG. 3 is a graph illustrating a relationship between a time and a rotation speed, according to the method for controlling the washing machine illustrated in FIG. 2 .
  • the method for controlling the washing machine (S100) includes a step of measuring a weight of dry laundry (S110), a washing step (S120), a step of measuring a weight of wet laundry (S130), a step of rotating a washing tub at a first speed (VM) (S141), a step of measuring a weight of the laundry (S143), and a step of determining whether to end spin-drying (S144).
  • the step of measuring the weight of the dry laundry is a step of measuring the weight of the dry laundry loaded into the washing tub 13.
  • the weight of the dry laundry represents a weight of laundry (an amount of laundry to be washed) before water is supplied to the washing tub 13.
  • the laundry is made of natural and/or synthetic fibers. As disclosed in the related art 1 mentioned above, the fibers have different water absorption properties depending on their type. Accordingly, a spin-drying speed and a spin-drying time are to be adjusted differently according to the type of the laundry so as to achieve a certain degree of spin-drying.
  • There is also another method for detecting a weight of laundry including causing a square wave to be generated when a signal generated by a back electromotive force of a motor is greater than or equal to a predetermined voltage, and detecting the weight of the laundry based on the number of pulses of the square wave, the number of pulses being generated by a rotational force that depends on the weight of the laundry.
  • the weight of laundry may be detected using a separate weight sensor.
  • the method for detecting the weight of laundry is a well-known technology, so a detailed description thereof will be omitted.
  • the washing step (S120) starts.
  • the washing step (S120) may be a step of supplying water to the washing tub 13, and washing and rinsing the laundry.
  • the washing step (S120) may be a step of supplying water to the washing tub 13 and washing or rinsing the laundry.
  • a step of measuring the weight of the wet laundry (S130) starts.
  • the step of measuring the weight of the wet laundry (S130) is a step of discharging water contained in the washing tub 13 and then measuring the weight of the wet laundry.
  • a controller of the washing machine 10 opens the drain valve 20 and operates the drain pump 19, before measuring the weight of the wet laundry.
  • the weight of the wet laundry represents a weight of laundry to be measured (an amount of laundry to be spin-dried) after the water contained in the washing tub 13 is discharged. As illustrated in FIG. 3 , the weight of the wet laundry is measured by the method for detecting the weight of the laundry as described above while repeating acceleration and deceleration of the washing tub 13.
  • the spin-drying starts (S140). As illustrated in FIG. 3 , after the spin-drying starts (S140), the washing tub 13 is gradually accelerated to rotate at the first speed (VM) (S141).
  • the step of rotating the washing tub 13 at the first speed (VM) is a step of rotating the washing tub 13 at a maximum rotation speed.
  • the maximum rotation speed may represent a maximum rotation speed of the washing tub 13 that is set as a default for specific washing courses (such as standard course, wool course, and duvet course).
  • the washing tub 13 is rotated constantly at the first speed (VM) for a predetermined period of time so as to spin-dry the laundry (S142).
  • the step of measuring the weight of the laundry is a step of measuring the weight of the laundry by the weight sensor 17 while the washing tub 13 is being rotated at the first speed (VM).
  • the step of determining whether to end the spin-drying (S144) is a step of ending spin-drying of laundry based on a weight measurement value.
  • Equation 1 When, in the step of determining whether to end the spin-drying (S144), a ratio of the weight measurement value to the weight of the dry laundry is equal to or less than a second reference value, the spin-drying of the laundry may be ended.
  • Equation 1 is expressed by Equation 1 as follows: C 0 A ⁇ X 2 where A: weight of dry laundry; Co: weight measurement value; X 2 : second reference value.
  • the spin-drying of the laundry may be ended.
  • the laundry is determined to have been sufficiently spin-dried. Accordingly, when the above condition is satisfied, the spin-drying of the laundry is ended.
  • the washing tub 13 is rotated again at the first speed (VM) for a predetermined period of time (S142). Then, the step of measuring the weight of the laundry (S143) and the step of determining whether to end the spin-drying (S144) are performed again.
  • the spin-drying of the laundry may be ended.
  • the weight sensor 17 measures the weight of the laundry multiple times, once at each time (t).
  • Equation 2 The above condition is expressed by Equation 2 as follows: C 0 ⁇ C t B ⁇ X 3 where B: weight of wet laundry; Co: weight measurement value; Ct: weight measurement value after time t has elapsed since Co was measured; X 3 : third reference value.
  • the third reference value and the time t are as follows:
  • the above equation 2 is an equation that determines whether, assuming that the weight of the wet laundry is 100%, the reduction amount of the weight measurement value for 1 minute is less than 1%. When, assuming that the weight of the wet laundry is 100%, the reduction amount of the weight measurement value for 1 minute is less than 1%, the laundry is determined to have been sufficiently spin-dried. When the above condition is satisfied, the spin-drying of the laundry is ended.
  • the washing tub 13 is rotated again at the first speed (VM) for a predetermined period of time (S142). Then, the step of measuring the weight of the laundry (S143) and the step of determining whether to end the spin-drying (S144) are performed again.
  • FIG. 4 is a flow chart illustrating a method for controlling a washing machine according to a second embodiment of the present disclosure.
  • FIG. 5 is a graph illustrating a relationship between a time and a rotation speed, according to the method for controlling the washing machine illustrated in FIG. 4 .
  • the method for controlling the washing machine (S200) includes a step of measuring a weight of dry laundry (S210), a washing step (S220), a step of measuring a weight of wet laundry (S230), a step of rotating a washing tub at a first speed (VM1) (S241), a step of measuring a weight of laundry (S243), a step of determining whether to end spin-drying (S244), and a step of determining whether to end secondary spin-drying (S245).
  • the step of measuring the weight of the dry laundry is a step of measuring the weight of the dry laundry loaded into the washing tub 13.
  • the weight of the dry laundry represents a weight of laundry (an amount of laundry to be washed) before water is supplied to the washing tub 13.
  • the washing step (S220) may be a step of supplying water to the washing tub 13, and washing and rinsing the laundry.
  • the washing step (S220) may be a step of supplying water to the washing tub 13 and washing or rinsing the laundry.
  • a step of measuring the weight of the wet laundry starts.
  • the step of measuring the weight of the wet laundry is a step of discharging water contained in the washing tub 13 and measuring the weight of the wet laundry.
  • a controller of the washing machine 10 opens the drain valve 20 and operates the drain pump 19, before measuring the weight of the wet laundry.
  • the weight of the wet laundry represents a weight of laundry to be measured (an amount of laundry to be spin-dried) after the water contained in the washing tub 13 is discharged. As illustrated in FIG. 5 , the weight of the wet laundry is measured by the method for detecting the weight of the laundry as described above while repeating acceleration and deceleration of the washing tub 13.
  • the step of rotating the washing tub 13 at the first speed (VM1) is a step of rotating the washing tub 13 at a maximum rotation speed.
  • the maximum rotation speed may represent a maximum rotation speed of the washing tub 13 that is set as a default for specific washing courses (such as standard course, wool course, and duvet course).
  • the washing tub 13 is rotated at a first speed (VM1) for a predetermined period of time to spin-dry the laundry (S242).
  • the step of measuring the weight of the laundry represents a step of measuring the weight of the laundry by the weight sensor 17 at the first speed (VM1).
  • the weight sensor 17 measures the weight of the laundry multiple times, once at each time (t).
  • the spin-drying of the laundry is ended when, in the step of determining whether to end the spin-drying (S244), a reduction rate of a weight measurement value is determined to be less than a first reference value.
  • Whether or not to end the spin-drying is determined by using two or more of the weight measurement values as variables without using the weight of the dry laundry and the weight of the wet laundry as variables.
  • the above condition is expressed by Equation 3 as follows: C 0 ⁇ C t C 0 ⁇ X 1 where Co: weight measurement value; Ct: weight measurement value after time t has elapsed since Co was measured; X 1 : first reference value.
  • the first reference value and the time t are as follows:
  • the washing tub 13 is again rotated at a first speed (VM1) for a predetermined period of time (S242). Then, the step of measuring the weight of the laundry (S243) and the step of determining whether to end the spin-drying (S244) are performed again.
  • the spin-drying of the laundry may be ended.
  • the laundry is determined to have been sufficiently spin-dried.
  • the spin-drying of the laundry is ended.
  • the spin-drying of the laundry may be ended.
  • the weight sensor 17 measures the weight of the laundry multiple times, once at each time (t).
  • the above condition is expressed by Equation 5 as follows: C 0 ⁇ C t B ⁇ X 3 where B: weight of wet laundry; Co: weight measurement value; Ct: weight measurement value after time t has elapsed since Co was measured; X 3 : third reference value.
  • the third reference value and the time t are as follows:
  • the above equation 5 is an equation that determines whether, assuming that the weight of the wet laundry is 100%, the reduction amount of the weight measurement value for 1 minute is less than 1%.
  • the laundry is determined to have been sufficiently spin-dried.
  • the spin-drying of the laundry is ended.
  • the first speed (VM1) is adjusted according to the weight measurement value (S246, S247).
  • a step of determining whether the current first speed (VM1) is the maximum rotation speed with respect to the weight measurement value (S246) starts.
  • the washing tub 13 is again rotated at the first speed (VM1) for a predetermined period of time (S242). Then, the step of measuring the weight of the laundry (S243), the step of determining whether to end the spin-drying (S244), and the step of determining whether to end the secondary spin-drying (S245) is performed again.
  • the first speed (VM1) may be set in the step of measuring the weight of the wet laundry (S230). That is, the first speed (VM1) may be a value corresponding to the weight of the wet laundry.
  • the first speed (VM1) is set to a value inversely proportional to the weight of the laundry in the controller of the washing machine 10. In general, the weight measurement value is smaller than the weight of the wet laundry since it is the weight of the laundry measured after the spin-drying starts.
  • a step of resetting the first speed (VM1) starts.
  • the first speed (VM1) is increased according to the weight measurement value.
  • the washing tub 13 is rotated at the changed first speed (VM2) for a predetermined period of time (S242). Then, the step of measuring the weight of the laundry (S243), the step of determining whether to end the spin-drying (S244) and the step of determining whether to end the secondary spin-drying (S245) is performed again.
  • FIG. 6 is a flow chart illustrating a method for controlling a washing machine, according to a third embodiment of the present disclosure.
  • FIG. 7 is a graph illustrating a relationship between a time and a rotation speed, according to the method for controlling the washing machine illustrated in FIG. 6 .
  • the method for controlling the washing machine (S300) includes a step of measuring a weight of dry laundry (S310), a washing step (S320), a step of measuring a weight of wet laundry (S330), a step of rotating a washing tub at a first speed (VD) (S341), a step of measuring a weight of laundry (S342), a step of determining a fabric quality of the laundry (S343), a step of setting a maximum spin-drying rotation speed (S344), and a step of rotating the washing tub at the maximum spin-drying rotation speed (S345).
  • the step of measuring the weight of the dry laundry is a step of measuring a weight of dry laundry loaded into the washing tub 13.
  • the weight of the dry laundry represents a weight of laundry (an amount of laundry to be washed) before water is supplied to the washing tub 13.
  • the washing step (S320) may be a step of supplying water to the washing tub 13, and washing and rinsing the laundry.
  • the washing step (S320) may be a step of supplying water to the washing tub 13, and washing or rinsing the laundry.
  • a step of measuring the weight of the wet laundry (S330) starts.
  • the step of measuring the weight of the wet laundry (S330) is a step of discharging water contained in the washing tub 13 and measuring the weight of the wet laundry.
  • a controller of the washing machine 10 opens the drain valve 20 and operates the drain pump 19, before measuring the weight of the wet laundry.
  • the weight of the wet laundry represents a weight of laundry to be measured (an amount of laundry to be spin-dried) after the water contained in the washing tub 13 is discharged. As illustrated in FIG. 7 , the weight of the wet laundry is measured by the method for detecting the weight of the laundry as described above while repeating acceleration and deceleration of the washing tub 13.
  • the spin-drying starts (S340). As illustrated in FIG. 7 , after the spin-drying starts (S340), the washing tub 13 is gradually accelerated to rotate at the first speed VD (S341).
  • the step of rotating the washing tub 13 at the first speed (VD) (S341) is a step of rotating the washing tub 13 at a detecting rotation speed that is slower than a resonance generation speed.
  • the detecting rotation speed may be around 400 RPM.
  • the detecting rotation speed may be, for example, 120 RPM, 250 RPM, or 400 RPM.
  • the weight sensor 17 measures the weight of the laundry (S342) and then determines the fabric quality of the laundry (S343).
  • the fabric quality of the laundry may be determined based on a reduction rate of the weight measurement value.
  • the weight sensor 17 measures the weight of the laundry multiple times, once at each time (t).
  • the fabric quality of the laundry may be determined by a result of Equation 6 below.
  • C 0 ⁇ C t C 0 Co: weight measurement value;
  • Ct weight measurement value after time t has elapsed since Co was measured.
  • the fabric quality of the laundry may be determined based on a reduction rate of the weight measurement value.
  • a rate at which water is removed from the laundry varies depending on a material of the laundry.
  • Data about the spin-drying speed for each laundry material that depends on the rotation speed of the washing tub 13 is stored in the controller in advance.
  • the controller of the washing machine 10 stores a time elapsed from the step of starting the spin-drying (S340) to the step of determining the fabric quality of laundry (S343), and the rotation speed of the washing tub 13. Accordingly, the controller may determine the fabric quality of the laundry based on the reduction rate of the weight measurement value.
  • the maximum spin-drying rotation speed (VM1) is reset according to the determined fabric quality of the laundry (S344).
  • the washing tub is rotated at the reset maximum spin-drying rotation speed (VM2) (S345).
  • VM2 maximum spin-drying rotation speed
  • FIG. 7 when a predetermined period of time has elapsed (S346) after the washing tub 13 was rotated at the maximum spin-drying rotation speed (VM2) (S345), the spin-drying of the laundry is ended.
  • FIG. 8 is a flow chart illustrating a method for controlling a washing machine (S400), according to a fourth embodiment of the present disclosure.
  • FIG. 9 is a diagram illustrating an exchange of information between a washing machine 10, a dryer 20, and a terminal 30.
  • the method for controlling the washing machine according (S400) to the fourth embodiment of the present disclosure includes a step of measuring a weight of dry laundry (S410), a washing step (S420), a step of measuring a weight of wet laundry (S430), a step of starting spin-drying (S440), a step of ending spin-drying (S441), a step of measuring a weight of the spin-dried laundry (S442), a step of transmitting first information to the terminal (S443), and a step of transmitting second information to the dryer (S444).
  • the measuring the weight of the dry laundry (S410) is a step of measuring a weight of dry laundry loaded into the washing tub 13.
  • the weight of the dry laundry represents a weight of laundry (an amount of laundry to be washed) before water is supplied to the washing tub 13.
  • the washing step (S420) may be a step of supplying water to the washing tub 13, and washing and rinsing the laundry.
  • the washing step (S420) may be a step of supplying water to the washing tub 13 and washing or rinsing the laundry.
  • the step of measuring the weight of the wet laundry (S430) is a step of discharging water contained in the washing tub 13 and measuring the weight of the wet laundry.
  • a controller of the washing machine 10 opens the drain valve 20 and operates the drain pump 19, before measuring the weight of the wet laundry.
  • the weight of the wet laundry represents a weight of laundry to be measured (an amount of laundry to be spin-dried) after the water contained in the washing tub 13 is discharged.
  • the weight of the wet laundry is measured by the method for detecting the weight of the laundry as described above while repeating acceleration and deceleration of the washing tub 13.
  • the spin-drying starts (S440). While the spin-drying is performed, the washing tub 13 is gradually accelerated to rotate at a maximum rotation speed, thereby spin-drying the laundry.
  • the processes from the step of starting the spin-drying (S440) to the step of ending the spin-drying (S441) proceed in the order of the processes from the step of starting the spin-drying (S140, S240, S340) to the step of ending the spin-drying, according to any one of the first to third embodiments of the present disclosure.
  • the step of measuring the weight of the spin-dried laundry starts.
  • the weight of the spin-dried laundry represents a weight of laundry to be measured after the spin-drying is ended.
  • the weight of the spin-dried laundry is measured by the method for detecting the weight of the laundry as described above while repeating acceleration and deceleration of the washing tub 13.
  • the step of measuring the weight of the spin-dried laundry (S442)
  • the step of transmitting the first information to the terminal 30 of a user (S443) and the step of transmitting the second information to the dryer 20 (S444) starts.
  • the first information may be transmitted to the dryer 20.
  • the second information may be transmitted to the terminal 30 of the user.
  • the first information may include the ratio of the weight of the spin-dried laundry to the weight of the dry laundry.
  • the second information may include the ratio of the weight of the spin-dried laundry to the weight of the dry laundry.
  • a dedicated application that allows the terminal 30 of the user to exchange information with the washing machine 10 and the dryer 20 is installed in the terminal 30 of the user.
  • the dedicated application of the terminal 30 is automatically executed.
  • the dedicated application may display the ratio of the weight of the spin-dried laundry to the weight of the dry laundry (hereinafter referred to as a first degree of spin-drying), the ratio of the weight of the spin-dried laundry to the weight of the wet laundry (hereinafter referred to as a second degree of spin-drying), and an predicted natural drying time determined by comparing the first degree of spin-drying with a current humidity. Accordingly, the user may recognize the natural drying time of the laundry when the spin-drying is ended.
  • the washing machine 10 and the dryer 20 may exchange information with each other via any type of wired or wireless communication.
  • the dryer 20 receives the first degree of spin-drying, the second degree of spin-drying, and information on a fabric quality of laundry.
  • the dryer 20 automatically sets a drying temperature or a drying time based on the first degree of spin-drying, the second degree of spin-drying, and the information on the fabric quality of laundry.
  • the user may load laundry into the dryer 20 and then immediately press a "start" button to quickly dry the laundry.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP20190801.9A 2019-10-15 2020-08-13 Procédé de commande de machine à laver Active EP3808886B1 (fr)

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KR20210023034A (ko) * 2019-08-21 2021-03-04 엘지전자 주식회사 지능형 세탁기를 이용한 세탁물 건조 방법 및 이를 위한 장치
KR20220157668A (ko) * 2021-05-21 2022-11-29 삼성전자주식회사 세탁기 및 그 제어 방법
EP4352293A1 (fr) * 2021-06-08 2024-04-17 Whirlpool Corporation Détection de charge et modification de cycle dans des applications d'appareil de blanchisserie
CN114351428B (zh) * 2021-12-18 2023-09-08 宁波思朗智能科技发展有限公司 一种干衣机控制方法、系统、干衣机及存储介质

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GB2202646A (en) * 1987-03-18 1988-09-28 Ti Creda Mfg Control of washing machines
KR20000025011A (ko) 1998-10-07 2000-05-06 전주범 세탁기의 탈수시간 제어방법
US20100293722A1 (en) * 2007-06-18 2010-11-25 Whirlpool S.A. Method for the operating control of a clothes washing machine and clothes washing machine
US20120060299A1 (en) * 2010-09-14 2012-03-15 Lg Electronics Inc. Washing machine and method of controlling washing machine
KR101729577B1 (ko) 2011-03-03 2017-04-24 엘지전자 주식회사 무게 감지 센서를 구비한 세탁기

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GB2202646A (en) * 1987-03-18 1988-09-28 Ti Creda Mfg Control of washing machines
KR20000025011A (ko) 1998-10-07 2000-05-06 전주범 세탁기의 탈수시간 제어방법
US20100293722A1 (en) * 2007-06-18 2010-11-25 Whirlpool S.A. Method for the operating control of a clothes washing machine and clothes washing machine
US20120060299A1 (en) * 2010-09-14 2012-03-15 Lg Electronics Inc. Washing machine and method of controlling washing machine
KR101729577B1 (ko) 2011-03-03 2017-04-24 엘지전자 주식회사 무게 감지 센서를 구비한 세탁기

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