EP2659048B1 - Waschmaschine mit einem schwingungsdämpfer - Google Patents
Waschmaschine mit einem schwingungsdämpfer Download PDFInfo
- Publication number
- EP2659048B1 EP2659048B1 EP20110791000 EP11791000A EP2659048B1 EP 2659048 B1 EP2659048 B1 EP 2659048B1 EP 20110791000 EP20110791000 EP 20110791000 EP 11791000 A EP11791000 A EP 11791000A EP 2659048 B1 EP2659048 B1 EP 2659048B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- washing machine
- electromagnets
- vibration damper
- tub
- vibration
- 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.)
- Not-in-force
Links
- 238000005406 washing Methods 0.000 title claims description 53
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 description 9
- 238000001035 drying Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
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
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
-
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/26—Imbalance; Noise level
Definitions
- the present invention relates to a washing machine that comprises a vibration damper.
- the laundry to be washed is loaded into the drum and the drum starts rotating in the tub after the washing program is started. While the drum performs rotational movement, the laundry moves in the drum in an unbalanced manner and causes vibration by hitting the side wall of the drum. Moreover, at the starts in the washing and spin-drying steps, while the drum rotates at the speed of angular rotation which corresponds to the natural frequency of the system consisting of the tub and the connection members, the system enters in resonance and the maximum vibration occurs at this moment.
- the intensity of the said vibration shows variability according to the amount of the laundry in the drum and can cause the tub to hit the side walls of the body and to be damaged from time to time.
- the washing machine creates a disturbing sound in the meantime and moves since it can not balance the oscillations of the tub. This causes customer dissatisfaction.
- Another method used for the solution of the problem is to use a dynamic vibration damper.
- a dynamic vibration damper By mounting a balancing system with the same natural frequency and which generally consists of the spring and the block to the system consisting of the tub and the connection members, the degree of freedom and hence the natural frequency number thereof are increased.
- the new formed system has two natural frequencies, one of which is lower than the former natural frequency while the other of which is higher, and does not enter in resonance at its former natural frequency.
- a front loading washing machine comprising a spring block system suspended under the tub. While the system rotates at its natural frequency, the block applies a force towards the tub and the spring minimizes the vibration of the tub by damping the said force.
- a washing machine comprising vibration prevention devices situated at more than one place on the tub.
- the vibration prevention devices consist of the spring, the block and the damping apparatuses connected to each other in series.
- the aim of the present invention is the realization of a washing machine wherein the vibrations caused by the drum while rotating are decreased.
- a vibration damper is disposed which dynamically damps the vibrations that occur.
- the vibration damper consists of at least two electromagnets disposed in a receptacle and a balancing member situated between said electromagnets.
- two electromagnets are disposed in the vibration damper.
- the electromagnets are situated at each end of the receptacle, and the balancing member between the electromagnets.
- the vibration damper which consists of two electromagnets can damp vibration in a single direction. A great amount of the vibration dampers in this embodiment can be used in the washing machine. Each vibration damper damps the vibration in the direction at which it is placed. In the vibration damper of this configuration, the width of the receptacle is equal to the length of the electromagnet. When the electromagnet is placed in the receptacle, no space remains at its sides.
- the vibration damper in an embodiment of the present invention, four electromagnets are disposed in the vibration damper.
- the electromagnets are placed in two pairs facing each other in the horizontal and vertical directions.
- Each edge of the preferably square shaped balancing member faces one electromagnet.
- the vibration damper in this embodiment can damp vibration in two different directions and is placed on the surface of the tub preferably symmetrically.
- the vibration damper in this embodiment can damp vibration in three different directions.
- permanent magnet is used as the balancing member. While the permanent magnet is placed between the electromagnets, the poles thereof are positioned so as to be subjected to the pushing force by the electromagnets.
- metal block is used as the balancing member.
- the metal block can be placed between the electromagnets in an isotropic way.
- the angular speed of the drum that corresponds to the natural frequency of the washing machine is detected in advance and when this speed is reached voltage is supplied to the electromagnets.
- the tachogenerator on the motor is utilized for detecting the rotation speed.
- a vibration gauge which is disposed on the tub, is present.
- the vibration gauge measures the vibrations acting on the tub throughout the whole program and transmits the data to the control unit.
- the control unit calculates the suitable voltage for the received vibration data and sends the said voltage to the electromagnets.
- control unit activates the vibration damper only for the vibrations above a certain threshold value.
- the vibration values of the drum that correspond to certain speed intervals and the magnitude of the voltage required to be supplied to the electromagnets for the said vibration values are recorded in the memory of the control unit. These speed intervals are determined preferably at equal intervals. (For example 200-400rpm, 400-600rpm, 600-800rpm, 800-1000rpm).
- the control unit which receives speed data from the tachogenerator throughout the program, sends to the electromagnets the voltage recorded in its memory for the related interval according to the rotation speed of the drum at that moment.
- the vibration dampers are preferably placed on the tub.
- the rotational movement of the drum, which is the source of the vibration, causes the greatest oscillations to occur in the tub. While the vibration dampers comprising two electromagnets can be placed in any desired region of the tub, the vibration dampers comprising four electromagnets are placed on the tub symmetrically.
- balance weights are placed on the tub and vibration dampers are placed on the balance weights.
- the vibrations that occur in the washing and spin-drying steps are minimized. Since the intensity of damping can be changed dynamically according to the magnitude of the vibration that occurs in the washing machine and/or to the speed of the drum, an effective damping is provided. Thus the washing machine is better protected and the lifespan of the machine is extended.
- the washing machine (1) comprises a body (2), a tub (3) situated in the body (2), a drum (4) mounted into the tub (3) so as to rotate around an axis and wherein the laundry to be washed is loaded and at least one vibration damper (5) which provides the vibrations that occur as a result of the rotation of the drum (4) to be decreased ( Figure 1, Figure 2 ).
- the vibration damper (5) comprises a receptacle (6), at least two electromagnets (7) placed in the receptacle (6) so as to face each other and such that a distance remains therebetween and a balancing member (8) situated between the electromagnets (7) and which displaces with the effect of the magnetic field created by the electromagnets (7).
- the vibration damper (5) is desired to be activated, voltage is sent to the electromagnets (7) and the electromagnets (7) are provided to be magnetized.
- the electromagnets (7) apply pushing force to the balancing member (8) disposed therebetween.
- the mass of the balancing member (8) is selected by taking into consideration the features, operation frequency and capacity of the components of the washing machine (1) such as the drum (4), the tub (3) and the body (2).
- the balancing member (8) starts to move between the electromagnets (7) and moves closer to the electromagnet (7) in the direction where the vibration is greatest. Since, as the distance between the electromagnet (7) and the balancing member (8) decreases, the pushing force therebetween increases, the balancing member (8) shows a behavior similar to the spring characteristics between the electromagnets (7) and provides the vibration to be damped.
- the vibration damper (5) comprises two electromagnets (7) and can damp vibrations in a single direction.
- the balancing member (8) which is disposed between the two electromagnets (7) situated oppositely, moves as a spring which oscillates in the linear direction when the vibration damper (5) is activated.
- the vibration damper (5) of this configuration can damp vibrations only in the direction at which it is placed.
- a great number of vibration dampers (5) can be placed in various regions of the tub (3) and/or the body (2) in different directions ( Figure 3, Figure 4, Figure 5 , Figure 6 ).
- the vibration damper (5) comprises four electromagnets (7) and can damp vibrations in two different directions.
- the electromagnets (7) are placed in two pairs facing each other in the horizontal and vertical directions.
- the balancing member (8) is situated in the middle of the electromagnets (7).
- the vibration damper (5) of this configuration can damp vibration in two directions and is preferably placed at the periphery of the tub (3) symmetrically ( Figure 7, Figure 8 , Figure 9 ).
- the vibration damper (5) comprises six electromagnets (7) and can damp vibrations in three different directions. In this embodiment, not only the vibrations in the horizontal and vertical directions but also the vibrations in the direction of the axis of the washing machine (1) can be damped.
- the balancing member (8) is a permanent magnet. In this embodiment, while the balancing member (8) is placed between the electromagnets (7), the directions of the poles are selected so as to be subjected to the pushing force by the electromagnets (7).
- the balancing member (8) is a metal block.
- the balancing member (8) can be placed between the electromagnets (7) without taking any pole direction into consideration.
- the vibration damper (5) is activated when a predetermined rotation speed is reached.
- the rotation speed at which the washing machine (1) enters in resonance is determined in advance and voltage is supplied to the electromagnets (7) when this speed is reached.
- the rotation speed of the drum (4) is detected by means of the tachogenerator on the motor that rotates the drum (4).
- the voltage supplied to the electromagnets (7) is cut off after the washing machine (1) passes the natural frequency value.
- the washing machine (1) comprises a vibration gauge (10) situated on the tub (3) and a control unit (9) which adjusts the magnitude of the voltage to be supplied to the electromagnets (7) according to the data received from the vibration gauge (10).
- the vibration gauge (10) is placed on the tub (3) and detects the vibration of the tub (3) and transmits that data to the control unit (9).
- the control unit (9) provides the voltage, which is suitable for the data received from the vibration gauge (10), to be calculated and sent to electromagnets (7).
- the electromagnets (7) supplied by voltage apply a magnetic pushing force to the balancing member (8) disposed therebetween, thus providing the vibration to be damped.
- the vibrations can be damped in an active manner ( Figure 10 ).
- the control unit (9) activates the vibration damper (5) at the vibrations above a predetermined value.
- a vibration value which does not damage the washing machine (1) and does not disturb the user, is predetermined and recorded in the control unit (9).
- the vibration damper (5) is prevented from operating when vibration damping is not necessary and thus energy saving is obtained.
- the control unit (9) supplies a voltage, the magnitude of which is predetermined, to the electromagnets (7) for each rotation speed.
- the vibration that the washing machine (1) creates at each rotation speed and the voltage to be supplied to the electromagnets (7) for damping this vibration are calculated in advance and recorded in the memory of the control unit (9).
- the motor rotation speed is detected by means of the tachogenerator and the vibration is provided to be damped by supplying to the electromagnets (7) the voltage that corresponds to this value.
- an effective damping is obtained throughout the whole washing program.
- the vibration damper (5) is placed on the tub (3).
- the vibration damper (5) increases the mass of the tub (3) and provides the natural frequency thereof to decrease.
- the washing machine (1) comprises a balance weight (11) placed on the tub (3) and which provides the natural frequency thereof to decrease by increasing the mass of the tub (3) and a vibration damper (5) placed on the balance weight (11).
- the balance weight (11) By means of the balance weight (11), the natural frequency of the washing machine (1) is decreased and thus the maximum vibration amplitude is decreased.
- a lighter balancing member (8) can be selected to be disposed in the vibration damper (5) and accordingly the electromagnets (7) are supplied with a lower voltage. This provides less energy to be consumed ( Figure 11 ).
- the vibrations that occur in certain steps of the washing program are decreased and these vibrations are prevented from damaging the components of the washing machine (1) in long term. Consequently, both the malfunction ratio is decreased and the lifespan of the washing machine (1) is extended. Moreover customer satisfaction is provided by minimizing the operation sound heard by the user and preventing the washing machine (1) from moving.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Claims (13)
- Waschmaschine (1), umfassend einen Gehäusekörper (2), einen Waschbehälter (3), der im Gehäusekörper (2) angeordnet ist, eine Trommel (4), die im Waschbehälter (3) um eine Achse drehend angebracht ist und in die die Wäsche gegeben wird, und wenigstens einen Vibrationsdämpfer (5), der für ein Reduzieren der Vibrationen sorgt, die aufgrund der Drehung der Trommel (4) auftreten, und dadurch gekennzeichnet, dass der Vibrationsdämpfer (5) eine Aufnahme (6), wenigstens zwei Elektromagnete (7), die unter Einhaltung eines Abstands dazwischen einander zugewandt in der Aufnahme (6) angeordnet sind, und ein Ausgleichselement (8) aufweist, das zwischen den Elektromagneten (7) angeordnet ist und sich durch die Wirkung des Magnetfelds verlagert, das von den Elektromagneten (7) erzeugt wird.
- Waschmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Vibrationsdämpfer (5) zwei Elektromagnete (7) umfasst und Vibrationen in einer einzelnen Richtung dämpfen kann.
- Waschmaschine (1) nach Anspruch 2, dadurch gekennzeichnet, dass der Vibrationsdämpfer (5) im Gehäusekörper (2) angeordnet ist.
- Waschmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Vibrationsdämpfer (5) vier Elektromagnete (7) umfasst und Vibrationen in zwei Richtungen dämpfen kann.
- Waschmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Vibrationsdämpfer (5) sechs Elektromagnete (7) umfasst und Vibrationen in drei Richtungen dämpfen kann.
- Waschmaschine (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Ausgleichselement (8) ein Magnet ist.
- Waschmaschine (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Ausgleichselement (8) ein Metallblock ist.
- Waschmaschine (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Vibrationsdämpfer (5) aktiviert wird, wenn die vorgegebene Drehzahl erreicht wird.
- Waschmaschine (1) nach einem der Ansprüche 1 bis 7, gekennzeichnet durch einen Vibrationsmesser (10), der am Waschbehälter (3) angeordnet ist, und eine Steuereinheit (9), die entsprechend den Daten vom Vibrationsmesser (10) die Stärke der Spannung anpasst, die an die Elektromagnete (7) angelegt wird.
- Waschmaschine (1) nach Anspruch 9, dadurch gekennzeichnet, dass die Steuereinheit (9) den Vibrationsdämpfer (5) für Vibrationen über einem vorgegebenen Wert aktiviert.
- Waschmaschine (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Steuereinheit (9) eine Spannung, deren Stärke vorgegeben ist, für jede jeweilige Drehzahl an die Elektromagnete (7) anlegt.
- Waschmaschine (1) nach einem der Ansprüche 1 bis 2 und der Ansprüche 4 bis 11, dadurch gekennzeichnet, dass der Vibrationsdämpfer (5) am Waschbehälter (3) angeordnet ist.
- Waschmaschine (1) nach einem der Ansprüche 1 bis 2 und der Ansprüche 4 bis 12, gekennzeichnet durch ein Ausgleichsgewicht (11), das am Waschbehälter (3) angeordnet ist und dafür sorgt, dass dessen natürliche Frequenz abnimmt, indem die Masse des Waschbehälters (3) erhöht wird und der Vibrationsdämpfer (5) an dem Ausgleichsgewicht (11) angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR201010951 | 2010-12-27 | ||
PCT/EP2011/071909 WO2012089453A1 (en) | 2010-12-27 | 2011-12-06 | A washing machine comprising a vibration damper |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2659048A1 EP2659048A1 (de) | 2013-11-06 |
EP2659048B1 true EP2659048B1 (de) | 2015-04-29 |
Family
ID=45093779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20110791000 Not-in-force EP2659048B1 (de) | 2010-12-27 | 2011-12-06 | Waschmaschine mit einem schwingungsdämpfer |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2659048B1 (de) |
WO (1) | WO2012089453A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106283504B (zh) * | 2015-05-25 | 2020-04-07 | 青岛海尔滚筒洗衣机有限公司 | 一种洗衣机及其控制方法 |
CN107974805B (zh) * | 2017-11-14 | 2023-06-06 | 珠海格力电器股份有限公司 | 一种减振结构、洗衣机及其减振方法 |
CN108286169B (zh) * | 2017-11-28 | 2021-09-21 | 珠海格力电器股份有限公司 | 一种洗衣机减振系统、洗衣机、振动检测方法及控制方法 |
EP3536842A1 (de) * | 2018-03-09 | 2019-09-11 | Vestel Elektronik Sanayi ve Ticaret A.S. | Auswuchtvorrichtung einer waschmaschine |
CN114941230B (zh) * | 2022-06-30 | 2024-06-21 | 海信冰箱有限公司 | 一种洗衣机及其控制方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1275765A1 (de) * | 2001-07-13 | 2003-01-15 | Otto Diethelm | Elektronisches Auswuchten für Waschmaschinen, Wäschetrockner, Wäschetrockner u.a |
JP2003144792A (ja) * | 2001-11-13 | 2003-05-20 | Hitachi Ltd | ドラム式洗濯機 |
US6933629B2 (en) * | 2001-12-14 | 2005-08-23 | Stirling Technology Company | Active balance system and vibration balanced machine |
DE102004044616B4 (de) * | 2004-09-13 | 2009-08-13 | Halcyonics Gmbh | Sensor-/Aktuator-Modul und Schwingungsisolierungsvorrichtung |
TR200808236T1 (tr) | 2006-06-21 | 2009-02-23 | Arçeli̇k Anoni̇m Şi̇rketi̇ | Bir çamaşır makinası |
US20080295545A1 (en) * | 2007-05-29 | 2008-12-04 | Lg Electronics Inc. | Dynamic Vibration Absorber |
US20090151398A1 (en) | 2007-12-18 | 2009-06-18 | Bsh Home Appliances Corporation | Anti-vibration device |
-
2011
- 2011-12-06 EP EP20110791000 patent/EP2659048B1/de not_active Not-in-force
- 2011-12-06 WO PCT/EP2011/071909 patent/WO2012089453A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP2659048A1 (de) | 2013-11-06 |
WO2012089453A1 (en) | 2012-07-05 |
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