EP4127291A1 - Verfahren zum betreiben eines waschautomaten und waschautomat - Google Patents
Verfahren zum betreiben eines waschautomaten und waschautomatInfo
- Publication number
- EP4127291A1 EP4127291A1 EP21714849.3A EP21714849A EP4127291A1 EP 4127291 A1 EP4127291 A1 EP 4127291A1 EP 21714849 A EP21714849 A EP 21714849A EP 4127291 A1 EP4127291 A1 EP 4127291A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- laundry
- speed
- washing machine
- torque
- 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.)
- Pending
Links
- 238000005406 washing Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005096 rolling process Methods 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 5
- 239000004753 textile Substances 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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
- 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
- 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
-
- 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
- D06F21/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement
- D06F21/12—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement the receptacle having a wobbling motion
-
- 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
- D06F33/36—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing
-
- 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
- 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
- D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps
-
- 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
- D06F34/06—Timing arrangements
-
- 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
-
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
- D06F2103/46—Current or voltage of the motor driving the drum
-
- 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
-
- 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
- D06F2105/54—Changing between normal operation mode and special operation modes, e.g. service mode, component cleaning mode or stand-by mode
-
- 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
- D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/34—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
- D06F37/304—Arrangements or adaptations of electric motors
Definitions
- the invention relates to a method for operating an automatic washing machine and an automatic washing machine.
- the invention relates to a method for operating an automatic washing machine and an automatic washing machine with a rib-less drum.
- washing machine drums have ribs in their interior.
- a rib which is also referred to as a driver, is a part of the drum which, when the drum moves, also sets the laundry inside the drum in motion, i.e. takes it with it.
- the rib is usually a plate in the drum, to which the laundry in the drum hangs up to a certain height when the drum is rotated and then falls back down and is swirled and shifted in this way.
- ribs in the drum which are arranged at predetermined distances from one another. The ribs are essential so that the laundry is shifted while a washing program is being carried out. However, the ribs are additional components that incur costs. Therefore, a ribless drum would be desirable.
- the invention thus poses the problem of providing a method for operating an automatic washing machine and an automatic washing machine with a ribless drum where the occurrence of rolling and / or slipping laundry when rotating the drum can be detected, in particular at a speed in the subcritical speed range.
- the advantages that can be achieved with the invention are that it offers an important prerequisite for the safe operation of an automatic washing machine with a rib-free drum. It protects the washing machine from destruction by detecting imbalances caused by rolling and / or slipping laundry, and thus also protects a user of the washing machine and the laundry washed in the washing machine from damage.
- the method therefore makes it possible to protect the washing machine and the laundry from damage.
- appropriate measures can be carried out, which are stored in the washing machine in order to prevent or at least reduce damage.
- the invention relates to a method for operating an automatic washing machine with a tub for receiving washing liquid, a ribless drum rotatably mounted in the tub for receiving laundry, a motor for driving the drum and a control device, the method including a step for detecting slippage and / or including rolling the laundry while rotating the drum
- the inventors have found that rolling and / or sliding laundry in the drum differs from laundry lying in the drum in that rolling and sliding laundry exert impulses on the drum shell. These pulses cause a deceleration of the drum's peripheral speed and thus a deviation or difference between the target and actual speed of the drum.
- the control device preferably has a control of the motor for driving the drum, which is designed so that the torque is increased when the actual speed of the drum is less than the target speed of the drum, and is reduced when the actual speed is greater than the target speed is. Therefore, the The size above can be used to determine whether the laundry slips and / or rolls in the drum.
- a ribless drum is a drum that does not have a rib or driver inside. However, it can have other elevations and / or depressions that do not have the shape of the plate-shaped rib or the driver.
- the drum preferably the drum shell, preferably has depressions and / or elevations other than a rib. It preferably has embossments, each of which is designed as an elevation or depression.
- the scanning is preferably carried out at a predetermined frequency.
- the predetermined frequency for sampling is preferably high and is, for example, 100 Hz.
- variable relating to the torque of the motor or the speed of the drum is the torque, a signal fluctuation correlating with the torque, the speed or a signal fluctuation correlating with the speed. More preferably, the size is the torque of the motor or the speed of the drum. More preferably, the size is the torque.
- determining whether the laundry slips and / or rolls in the drum preferably includes a frequency analysis with which frequency components of the variable are determined in a predetermined frequency range.
- the frequency analysis is preferably a Fast Fourier Transformation (FTT).
- determining whether the laundry rolls and / or slips further comprises adding up and / or forming the effective value of the determined frequency components of the magnitude that lie in the predetermined frequency range. This makes it easy to calculate a single value that is comparable to another value.
- the predetermined frequency range can be segmented.
- the predetermined frequency range preferably has higher and lower frequencies than the drum rotational frequency, ie the predetermined frequency range excludes the drum rotational frequency and includes frequencies that are not equal to the drum rotational frequency.
- a fixed imbalance that occurs in practice and is applied to the drum at speeds greater than the application speed causes a difference between the actual and the drum Target speed, which is compensated by the motor control by increasing and decreasing the torque.
- This embodiment is therefore based on the basic idea that the regulation of the variable as well as the torque to compensate for the fixed imbalance formed due to the rotation at a speed greater than the application speed causes an oscillation of the torque at the drum speed, while the impulses of the rolling and sliding laundry cause oscillations of the Cause torque that occur at higher or lower frequencies than the drum rotation frequency.
- a value is determined by means of the frequency analysis, which is compared with a limit value stored in the washing machine, it being determined that the laundry slips and / or rolls if the determined value is greater than the limit value. If the determined value is greater than the limit value, there is a load situation with sliding and / or rolling laundry, i.e. there is laundry in the drum that is sliding and / or rolling. If the determined value is less than or equal to the limit value, then there is a loading situation without sliding and / or rolling laundry, i.e. there is no laundry in the drum that is sliding and / or rolling.
- limit values can also be stored in the washing machine, each of which depends, for example, on the speed of the drum at which the variable is scanned over the predetermined period and / or on the load quantity. The greater the load, the greater the problems described above with sliding and / or rolling laundry. Furthermore, several limit values can also be stored in the washing machine, each of which depends, for example, on the type of fabric to be subjected to the washing program, which is defined by the user setting the washing program when the washing program is started. Slipping and / or rolling is much more problematic for delicate laundry such as silk or wool than for less sensitive laundry such as cotton laundry, because the risk of damage due to the friction between the textile and the drum shell is greater.
- predetermined measures are preferably also carried out, which are stored in the washing machine, in order to prevent or at least reduce the sliding and / or rolling of the laundry.
- the rotation of the drum is stopped when it is determined, on the basis of the variable scanned over the period of time, whether the laundry is sliding and / or rolling in the drum, that the laundry is sliding and / or rolling.
- the speed of rotation of the drum is preferred to be 0 min -1 set, whereby the drum can then be rotated again after setting the speed of the drum to 0 min -1. For example, after the drum has stopped rotating, the speed is then increased to a speed below the application speed at which the centrifugal force acting on the laundry is greater than the force of gravity.
- the predetermined period of time preferably comprises a complete revolution of the drum or an integral multiple of the complete revolution of the drum.
- the predetermined period of time preferably has an integral multiple of the complete revolution. This can minimize errors.
- the integer multiple is preferably in the range from 2 to 20, more preferably 3 to 10. If the speed of the drum is, for example, 120 min -1 , which corresponds to two complete revolutions of the drum per second, then the predetermined period of time can be, for example, 3 seconds, so that it spans six complete revolutions of the drum.
- the method can also be carried out at any desired speed, the predetermined period of time being adapted accordingly and being stored accordingly in the washing machine. The longer an item of laundry slips and / or rolls on the drum shell, the greater the risk that the textile will be damaged due to the friction between the textile and the drum shell.
- the predetermined period of time is therefore preferably in the period of a few seconds.
- the speed of the drum at which the drum is rotated in the process is above the application speed. In a preferred embodiment, the speed is in the subcritical range, ie a range from 70 to 149 min -1 . More preferably, the speed of the drum, wherein the drum is rotated in the process, in the range of 120 to 149 minutes -1. In this area, the problem of slipping and / or rolling laundry occurs particularly frequently. It occurs just as often at lower speeds. The reason for this speed range of 120-149 rpm is that the method works more reliably in this speed range, the evaluable signals are better (keyword signal-to-noise ratio).
- the invention further relates to an automatic washing machine with a tub for receiving washing liquid, a ribless drum rotatably mounted in the tub for receiving laundry, a motor for driving the drum and a control device which is designed and set up, a method according to one or more of the carry out embodiments described above. Embodiments and advantages described for the method apply accordingly to the washing machine and vice versa.
- the washing machine can be a front loader or a top loader.
- the term “washing machine” also includes a combination device such as a washer-dryer.
- the drum is preferably mounted in the tub so that it can rotate horizontally.
- the control device can be designed in one or more parts. In addition to regulating the speed of the motor for driving the drum, it has other regulations or controls that are required to carry out the washing program.
- FIG. 2 the sampled over the predetermined period of time shown in FIG. 1
- FIG. 1 shows a curve of a torque of the motor over a predetermined period of time in a method according to the invention with and without slipping and / or rolling laundry.
- the method according to the invention is a method for operating a washing machine with a tub for receiving washing liquid, a rib-less drum rotatably mounted in the tub for receiving laundry, a motor for driving the drum and a control device, the method including a step for detecting slippage and / or rolling the laundry, including while rotating the drum
- Fig. 1 shows the time waveform of the torque at a speed of the drum of 120 min -1 .
- the predetermined period of time is 3 seconds during which the drum makes six complete revolutions at two revolutions per second.
- the laundry lies completely against the drum shell, so that the drum is without rolling and / or sliding laundry, and a fixed imbalance has formed.
- This fixed unbalance ensures that the regulation of the motor per drum revolution increases the torque relative to an average value if the increase in the fixed unbalance causes the speed to slow down, and decreases it relative to an average value if the lowering of the fixed unbalance causes an acceleration of the speed.
- the signal curve of the torque for the drum with fixed imbalance and slipping and / or rolling laundry, in which the laundry is not completely in contact with the drum shell, as shown by the dashed line, differs from the signal curve of the torque for the drum without rolling and / or slipping laundry away.
- FIG. 2 shows the torque of the motor, shown in FIG. 1, sampled over the predetermined period of time as a function of the frequency with and without slipping and / or rolling laundry.
- the torques shown in FIG. 1, sampled over the predetermined period of time have been subjected to an FFT, which leads to the spectrum shown in FIG. 2.
- the oscillation on the time signal of the torque caused by the fixed unbalance takes place at the drum rotation frequency, as shown by the solid line.
- the signal of the torque with fixed unbalance and slipping and / or rolling laundry, as shown by the dashed line however, compared to the signal of the solid line, also has frequency components or vibration components that are different from the drum rotation frequency.
- frequency components or portions are visible in FIG. 2 in the frequency range between approx. 0.5 and 1.5 Hz identified with the reference number 1 and in the frequency range identified with the reference number 2 from approx. 2.5 Hz.
- Both loading situations i.e. loading with sliding and / or rolling laundry and without sliding and / or rolling laundry, have a constant component at 0 Hz, which corresponds to the mean torque for overcoming the friction in the overall system.
- the position of the frequency range identified by the reference number 2 can depend on the geometric shape of the drum and the geometric shape of the sliding and / or rolling laundry.
- the determination of whether the laundry is slipping and / or rolling is carried out in the method according to the invention explained in relation to FIGS. 1 and 2 in that all frequency components of the torque are at frequencies between, for example, 0.5 and 1.5 Hz and are summed up over 2.5 Hz, so that a value is determined, whereby, for example, a calculation method of rms value formation in which all frequency components in the specified frequency ranges are squared and summed up and then their square root is formed is equivalent.
- a limit value is predetermined for each of these calculation methods and stored in the washing machine. If the determined value is greater than the limit value, it is a loading situation with rolling and / or sliding laundry. If the determined value is less than or equal to the limit value, it is a loading situation without rolling and / or sliding laundry.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020108688.1A DE102020108688A1 (de) | 2020-03-30 | 2020-03-30 | Verfahren zum Betreiben eines Waschautomaten und Waschautomat |
PCT/EP2021/057237 WO2021197886A1 (de) | 2020-03-30 | 2021-03-22 | Verfahren zum betreiben eines waschautomaten und waschautomat |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4127291A1 true EP4127291A1 (de) | 2023-02-08 |
Family
ID=75267488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21714849.3A Pending EP4127291A1 (de) | 2020-03-30 | 2021-03-22 | Verfahren zum betreiben eines waschautomaten und waschautomat |
Country Status (6)
Country | Link |
---|---|
US (1) | US20230140507A1 (de) |
EP (1) | EP4127291A1 (de) |
KR (1) | KR20220151710A (de) |
CN (1) | CN115516153A (de) |
DE (1) | DE102020108688A1 (de) |
WO (1) | WO2021197886A1 (de) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6418581B1 (en) * | 1999-06-24 | 2002-07-16 | Ipso-Usa, Inc. | Control system for measuring load imbalance and optimizing spin speed in a laundry washing machine |
US9157177B2 (en) * | 2011-12-21 | 2015-10-13 | Whirlpool Corporation | Laundry treating appliance and method of control |
KR102270515B1 (ko) * | 2014-09-16 | 2021-06-29 | 삼성전자주식회사 | 세탁기 및 그 제어 방법 |
-
2020
- 2020-03-30 DE DE102020108688.1A patent/DE102020108688A1/de active Pending
-
2021
- 2021-03-22 EP EP21714849.3A patent/EP4127291A1/de active Pending
- 2021-03-22 US US17/915,413 patent/US20230140507A1/en active Pending
- 2021-03-22 WO PCT/EP2021/057237 patent/WO2021197886A1/de unknown
- 2021-03-22 KR KR1020227037859A patent/KR20220151710A/ko unknown
- 2021-03-22 CN CN202180033442.4A patent/CN115516153A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
CN115516153A (zh) | 2022-12-23 |
WO2021197886A1 (de) | 2021-10-07 |
DE102020108688A1 (de) | 2021-09-30 |
KR20220151710A (ko) | 2022-11-15 |
US20230140507A1 (en) | 2023-05-04 |
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