EP2072653A1 - Waschmachine mit Vibrationsschutzvorrichtung - Google Patents

Waschmachine mit Vibrationsschutzvorrichtung Download PDF

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Publication number
EP2072653A1
EP2072653A1 EP08105933A EP08105933A EP2072653A1 EP 2072653 A1 EP2072653 A1 EP 2072653A1 EP 08105933 A EP08105933 A EP 08105933A EP 08105933 A EP08105933 A EP 08105933A EP 2072653 A1 EP2072653 A1 EP 2072653A1
Authority
EP
European Patent Office
Prior art keywords
mass
washing machine
machine according
vibration device
hollow tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08105933A
Other languages
English (en)
French (fr)
Inventor
Huiyu Fang
Ramon Rodriguez
Oliver SCHÖNE
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2072653A1 publication Critical patent/EP2072653A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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

Definitions

  • the present invention relates to a washing machine, and more particularly, to a washing machine having an anti-vibration device on an oscillating system, including a washing tub.
  • a conventional washing machine typically includes a housing.
  • a tub is disposed in the housing and a laundry drum is rotatably mounted in the tub.
  • clothes are placed in the laundry drum and washing, rinsing and hydro-extracting tasks are automatically carried out according to a prescribed program.
  • excess water is removed from the laundry drum by centrifugal force created by the laundry drum rotating (i.e., spinning) at high speeds.
  • a conventional washing machine typically is a rotordynamic system with an unbalanced washing load resulting, for example, from the clothes in the laundry drum being unevenly arranged. Under a high spinning speed of the laundry drum, the unbalanced load may create a severe asymmetric centrifugal force that may cause the entire oscillating system to vibrate, for example, in a wobbling fashion.
  • conventional washing machines have added structure-damping and/or mass-damping to the housing to attempt to address off-balance vibration.
  • counterweights also have been attached to the tub to address vibration of the washing machine to attempt to reduce the magnitude of vibration of the laundry drum.
  • Other conventional washing machines have attached, for example, a liquid-filled balance ring, a movable ball dynamic balancer, etc. to the spinning drum to attempt to address off-balance vibration.
  • the focus on reducing vibrations has been on the laundry drum and the housing.
  • the conventional washing machines leave room for improvement in addressing the wobbling of the washing machine, for example, under high speed spinning of the laundry drum.
  • the exemplary aspects of the invention focus on reducing vibrations on the tub, instead of on the laundry drum and the housing.
  • an exemplary embodiment is directed to a washing machine including a housing, a tub disposed in the housing, a laundry drum rotatably mounted in the tub, and an anti-vibration device on the tub.
  • Another exemplary embodiment is directed to an apparatus including an outer cylinder, an inner cylinder rotatably mounted in the outer cylinder, and an anti-vibration device on the outer cylinder.
  • the anti-vibration device may provide a vibration which is directed opposed to the vibration of the tub, especially a vibration ob the tub caused by an uneven distributed laundry within the drum during spinning.
  • a washing machine having an anti-vibration device according to the embodiments of the invention may reduce the wobbling of the washing machine based on one or more frequencies of the system under a high speed spinning by providing an anti-vibration device on the tub.
  • the anti-vibration device may provide anti-vibration at one or more predetermined frequencies or ranges of frequencies, and more particularly, anti-resonance at one or more resonant frequencies or ranges of resonant frequencies.
  • the anti-vibration device according to embodiments of the invention may provide adjustability for a variety of frequencies.
  • the exemplary aspects of the invention may reduce or eliminate vibration of the tub, and more particularly, may reduce or eliminate the wobbling motion of the tub under high spinning speeds of the laundry drum, which may range from 0-1200 RPM, or higher, in some washing machines.
  • FIG. 1 is a schematic front view of a washing machine according to an embodiment of the invention.
  • FIG. 2 is a schematic front view of a washing machine according to another embodiment of the invention.
  • FIG. 3 is a schematic side view of a washing machine according to another embodiment of the invention.
  • FIG. 4 is a schematic front view of a washing machine according to another embodiment of the invention.
  • FIG. 5 is a schematic front view of a washing machine according to another embodiment of the invention.
  • FIG. 6 is a schematic side view of a washing machine according to another embodiment of the invention.
  • FIG. 7 is a schematic view of an anti-vibration device according to an embodiment of the invention.
  • FIG. 8 is a schematic of an energy absorbing feature according to an aspect of the invention.
  • FIG. 9 is a schematic of an energy absorbing feature according to another aspect of the invention.
  • FIG. 10 is a schematic of an energy absorbing feature according to another aspect of the invention.
  • FIG. 11 is a graph showing a typical function describing the housing vibration magnitude in a washing machine spinning process.
  • FIG. 12 is another graph showing a function describing the housing vibration magnitude in a washing machine spinning process according to an embodiment of the invention.
  • FIG. 13 is a perspective view of an anti-vibration device according to an embodiment of the invention.
  • FIG. 14 is a perspective view of another anti-vibration device according to another embodiment of the invention.
  • FIG. 15 is a perspective view of another anti-vibration device according to an embodiment of the invention.
  • FIG. 16 is a perspective view of another anti-vibration device according to an embodiment of the invention.
  • a washing machine may include a housing 2, a tub 6 disposed in the housing 2, and a laundry drum 4 rotatably mounted in the tub 6.
  • An anti-vibration device 10 may be on the tub.
  • the anti-vibration device 10 is not limited to providing anti-vibration at a single frequency.
  • the anti-vibration device may reduce vibrations on the tub 6 at one or more predetermined frequencies or ranges of frequencies. More particularly, the anti-vibration device may provide anti-resonance at one or more resonant frequencies or ranges of resonant frequencies.
  • aspects of the anti-vibration device 10 may provide anti-vibration, for example, at a first predetermined frequency (e.g., a first resonant frequency) and a second predetermined frequency (e.g., a second resonant frequency).
  • more than one anti-vibration device 10 may be mounted on the tub 6 of the washing machine at various positions to optimize the anti-vibration affects, and more particularly, the anti-resonance affects, of the anti-vibration device 10.
  • one or more anti-vibration devices 10 may be on (e.g., mounted on or mounted directly on) the tub 6.
  • the ordinarily skilled artisan will recognize that other arrangements of one or more anti-vibration devices 10 on the tub 6 may be provided within the spirit and scope of the invention.
  • FIG. 3 shows a side view of an assembly having a laundry drum 4 and tub 6, according to an aspect of the invention.
  • the magnitude of vibration at the front end 56 of the tub 6 generally will be greater than the magnitude of vibration at the rear end 58 of the tub 6. That is, a higher magnitude of vibration generally will occur at the front end 56 of the tub 6.
  • one or more anti-vibration devices 10 may be provided on the front end 56 of the tub 6.
  • FIGS. 4 and 5 show other embodiments in which the anti-vibration device 10 may be on one or more counter balance weights 8, such as concrete weights, which are on the tub 6.
  • the anti-vibration device 10 may be on one or more counter balance weights 8, such as concrete weights, which are on the tub 6.
  • one or more anti-vibration devices 10 may be on each of the counter balance weights 8.
  • the ordinarily skilled artisan also will recognize that other arrangements of the counter balance weights 8 on the tub 6 may be provided.
  • FIG. 6 shows a side view of an assembly having a laundry drum 4 and tub 6, according to another aspect of the invention.
  • one or more anti-vibration devices 10 may be provided on one or more counter balance weights 8 on the front end 56 of the tub 6.
  • the anti-vibration devices 10 may be provided directly on the tub 6 and/or on the counter balance weights 8.
  • FIG. 7 is a schematic view of an anti-vibration device 10 according to an embodiment of the invention.
  • the anti-vibration device 10 may include an energy absorbing feature (e.g., a vibration absorbing feature) 22 that reduces the kinetic energy of the tub at a predetermined frequency or at a plurality of frequencies, such as a first predetermined frequency and a second predetermined frequency.
  • the anti-vibration device 10 having the energy absorbing feature 22 may provide anti-resonance at a resonant frequency, or at a plurality of resonant frequencies, such as a first resonant frequency and a second resonant frequency.
  • the anti-vibration device 10 having the energy absorbing feature 22 may provide anti-vibration at a range of frequencies, or anti-resonance at a range of resonant frequencies.
  • FIG. 8 shows an exemplary aspect of a single degree of freedom (1 DOF) energy absorbing feature 22 having a mass in communication with two springs.
  • FIG. 9 shows another exemplary aspect of a two degree of freedom (2 DOFs) energy absorbing feature 22 having a first spring, a first mass, a second spring, a second mass, and a third spring arranged in series.
  • FIG. 10 shows an exemplary aspect of a two degree of freedom (2 DOF) energy absorbing feature 22 having a spring-mass-damping mechanism.
  • dampers having a damping coefficient c may be arranged to be parallel to the first spring, second spring, and third spring.
  • FIG. 11 shows a graph of a frequency response function for an apparatus without an anti-vibration device.
  • FIG. 12 is a graph showing a frequency response function for an apparatus having an anti-vibration device 10 according to an exemplary embodiment of the invention.
  • an anti-vibration device 10 having a vibration absorbing device 22 may provide frequency bifurcation, which may reduce the amplitude of the frequency.
  • the mass and spring stiffness may be fine tuned to reduce the kinetic energy of the tub 6 at one or more predetermined frequencies or range of frequencies, thereby reducing the wobbling effect on the washing machine.
  • the anti-vibration device 10 may include, for example, a hollow tube 20 having a longitudinal axis.
  • the hollow tube 20 may be, for example, a hollow plastic tube, metal tube, or the like.
  • the hollow tube 20 may be, for example, a cylindrical hollow tube as shown in FIGS. 13-16 , or another shape of a hollow tube, such as a box-shaped or square-shaped hollow tube or the like.
  • the ends of the hollow tube 20 may include a first mounting cap 12, which is attached to a first end of the hollow tube 20, and a second mounting cap 14, which is attached to a second end of the hollow tube 20.
  • the mounting caps 12 and 14 may be, for example, made of metal, plastic, etc.
  • the mounting caps 12 and 14 also may provide a secure mounting surface for the ends of the anti-vibration device 10.
  • Each of the first mounting cap 12 and the second mounting cap 14 also may include an attachment element, such as mounting holes 16 and 18, respectively, for mounting the anti-vibration device 10 on, for example, the tub 6 or on a counter balance weight 8, which is on the tub 6.
  • an attachment element such as mounting holes 16 and 18, respectively, for mounting the anti-vibration device 10 on, for example, the tub 6 or on a counter balance weight 8, which is on the tub 6.
  • attachment elements such as other female connectors or fittings, male connectors or fittings, adhesives, welds, etc. may be used to mount or secure the anti-vibration device 10.
  • the anti-vibration device 10 may include a mass 26 suspended between longitudinal ends of the hollow tube 20 by a pair of springs 24 and 28. Each of the springs 24 and 28 may have a predetermined stiffness k.
  • the mass 26 may have a mass m 0 . As shown in FIG. 13 , the mass 26 may be configured to be coaxial with the longitudinal axis of the hollow tube 20.
  • the anti-vibration device 10 may include a first mass 32 and a second mass 36 arranged in series and suspended between longitudinal ends of the hollow tube 20.
  • the first mass 32 and the second mass 36 may be configured to be coaxial with the longitudinal axis of the hollow tube 20.
  • FIG. 14 shows an exemplary aspect in which the mass m 0 of the first mass 32 may be substantially equal to the mass m 0 of the second mass 36.
  • a first spring 30 connects a first end of the hollow tube 20 to a first end of the first mass 32.
  • a second spring 34 connects a second end of the first mass 32 to a first end of the second mass 36.
  • the second end of the first mass 32 is adjacent to the first end of the second mass 36.
  • a third spring 38 connects a second end of the second mass 36 to a second end of the hollow tube 20.
  • FIG. 14 shows an exemplary aspect in which a stiffness k 1 of the first spring 30 may be substantially equal to a stiffness k 1 of the third spring 38.
  • a stiffness k 2 of the second spring 34 may be different from the stiffness k 1 of the first spring 30 and/or the second spring 38.
  • the embodiment of the anti-vibration device 10 having the first mass 32, the second mass 36, and the springs 30, 34, and 38 may provide anti-vibration, for example, at two predetermined frequencies, and more particularly, anti-resonance, for example, at two predetermined resonant frequencies. Accordingly, the exemplary embodiments may provide a fine-tuned anti-vibration device 10 on the tub 6 that may provide anti-vibration, and more particularly, anti-resonance.
  • the anti-vibration device 10 may be suspended within the hollow tube 20 without contacting an inner surface of the hollow tube 20.
  • the embodiments may improve performance and reduce wear on the anti-vibration device 10.
  • the hollow tube 20 may be filled with a viscous fluid 40 to reduce or prevent friction between the masses (e.g., 32 and 36) and the inner surface of the hollow tube 20, as shown in FIG. 15 .
  • the embodiment may include rubber bushings 42 and 44 that are connected to each of a first end and a second end of the hollow tube 20 to hermetically seal the hollow tube 20 and prevent the viscous fluid 40 from leaking from the hollow tube 20.
  • the anti-vibration device 10 may include a damping device, or a variable damping device which has a variable damping coefficient c.
  • the viscous fluid 40 in the hollow tube 20 can provide damping in the anti-vibration device 10.
  • variable viscosity fluid 46 may be used to provide a variable damping device, thereby providing anti-vibration at variable frequencies.
  • the variable viscosity fluid 46 may be a temperature sensitive viscous fluid that changes viscosity in response to changes in temperature of the fluid, or a magnetic responsive fluid (eg. magnetorheologic fluid) that changes viscosity in response to magnetic forces, or an electric responsive fluid (eg. electrorheologic fluid) that changes viscosity in response to electric field.
  • the variable viscosity fluid 46 may be responsive to other stimulus that may change the viscosity of the fluid. By changing the viscosity of the fluid the damping coefficient c may be variable adjusted.
  • variable viscosity fluid 46 may be used to provide anti-vibration at variable frequencies, thereby permitting the washing machine to operate at a larger acceptable range of spinning speeds of the laundry drum.
  • the mass of one or more masses of the anti-vibration device 10 may be variable.
  • a mass of the anti-vibration device 10 may be variable, for example, by changing an amount of a liquid in the mass (e.g., in a cavity formed in the mass).
  • the stiffness of one or more springs of the anti-vibration device 10 may be variable. In an embodiment, the stiffness of one or more springs of the anti-vibration device 10 may be variable, for example, in response to stimulus, such as temperature, electromagnetic forces, etc.
  • an element 48 may be mounted on the hollow tube 20 for changing viscosity of the variable viscosity fluid 46.
  • the element 48 may be a heating element used to change the temperature of the variable viscosity fluid 46, thereby adjusting a viscosity of the variable viscosity fluid 46 within the hollow tube 20.
  • the element 48 may be an electromagnet or in case of a electrorheologic fluid 46 the element 48 may also be an element comprising at least two electrodes.
  • the element 48 may be electrically connected by a wire 50 to a controller 52, which may receive an input from a motion detector 54.
  • the motion detector 54 may be any device that detects motion, such as an accelerometer, a linear motion detector, an optical motion sensor, etc.
  • the controller 52 and the element 48 may build up a open loop control dependent on the drum speed or the controller 52, the element 48 and the motion detector 54 may build up a closed loop vibration control.
  • vibration attenuation devices on the housing 2 and/or the laundry drum 4 may be used in cooperation with the anti-vibration device 10 on the tub 6, according to embodiments of the invention.
  • another embodiment of the invention is directed to an apparatus including an outer cylinder, an inner cylinder rotatably mounted in the outer cylinder, and an anti-vibration device on the outer cylinder.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
EP08105933A 2007-12-18 2008-12-03 Waschmachine mit Vibrationsschutzvorrichtung Withdrawn EP2072653A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/002,895 US20090151398A1 (en) 2007-12-18 2007-12-18 Anti-vibration device

Publications (1)

Publication Number Publication Date
EP2072653A1 true EP2072653A1 (de) 2009-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08105933A Withdrawn EP2072653A1 (de) 2007-12-18 2008-12-03 Waschmachine mit Vibrationsschutzvorrichtung

Country Status (3)

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US (1) US20090151398A1 (de)
EP (1) EP2072653A1 (de)
CA (1) CA2645978A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20090933A1 (it) * 2009-11-27 2011-05-28 Indesit Co Spa Macchina per il trattamento dei panni provvista di un dispositivo smorzatore di vibrazioni
WO2012089453A1 (en) 2010-12-27 2012-07-05 Arcelik Anonim Sirketi A washing machine comprising a vibration damper
CN102859062A (zh) * 2010-04-26 2013-01-02 株式会社东芝 洗涤机以及干燥机
CN103103718A (zh) * 2011-11-11 2013-05-15 三星电子株式会社 滚筒洗衣机
US8851247B2 (en) 2010-05-21 2014-10-07 Kabushiki Kaisha Toshiba Damper, washing machine and washing/drying machine
EP3106710A1 (de) * 2015-06-15 2016-12-21 Airbus Defence and Space GmbH Schwingungsdämpfervorrichtung
WO2017064655A1 (en) * 2015-10-16 2017-04-20 Bitron S.P.A. Process for measuring and controlling an operational parameter of a washing machine

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KR101330732B1 (ko) * 2009-10-23 2013-11-20 삼성전자주식회사 세탁기와 그 밸런서
US9260811B2 (en) * 2010-08-13 2016-02-16 Safedin Zelić Annular auto-balancing mechanism
CA2885880C (en) * 2014-04-04 2018-07-31 Image Searcher, Inc. Image processing including object selection
CN105525484B (zh) * 2014-09-28 2020-04-14 青岛海尔滚筒洗衣机有限公司 洗衣机用内筒及洗衣机
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
US10100453B2 (en) 2016-02-18 2018-10-16 Whirlpool Corporation Laundry treating appliance with tuned suspension system
JP6740445B2 (ja) * 2016-07-07 2020-08-12 エルジー エレクトロニクス インコーポレイティド 洗濯物処理装置
EP3266920B1 (de) 2016-07-07 2020-09-30 LG Electronics Inc. -1- Wäschebehandlungsvorrichtung
CN107587312B (zh) 2016-07-07 2019-11-01 Lg电子株式会社 洗涤物处理装置
CN107587313B (zh) * 2016-07-07 2020-08-21 Lg电子株式会社 洗涤物处理装置
EP3348697A1 (de) 2017-01-12 2018-07-18 Electrolux Appliances Aktiebolag Gerät mit einem oder mehreren sensoren
TR201706545A2 (tr) 2017-05-04 2018-11-21 Arcelik As Bi̇r di̇nami̇k ti̇treşi̇m sönümleyi̇ci̇ ve kullanildiği ev ci̇hazi
TR201706613A3 (tr) 2017-05-05 2018-12-21 Arcelik As Bi̇r di̇nami̇k ti̇treşi̇m sönümleyi̇ci̇ ve kullanildiği çamaşir maki̇nesi̇
TR201706654A2 (tr) 2017-05-05 2018-11-21 Arcelik As Bi̇r di̇nami̇k ti̇treşi̇m sönümleyi̇ci̇ ve kullanildiği çamaşir maki̇nesi̇
US20210095738A1 (en) * 2019-09-27 2021-04-01 Mw Industries, Inc. Multiple frequency vibration attenuation device
CN112760927B (zh) * 2020-12-21 2022-04-15 珠海格力电器股份有限公司 减震组件和洗衣机及控制方法

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EP0942196A2 (de) * 1998-03-12 1999-09-15 Miele & Cie. GmbH & Co. Vorrichtung zum Auswuchten von rotierenden Körpern
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20090933A1 (it) * 2009-11-27 2011-05-28 Indesit Co Spa Macchina per il trattamento dei panni provvista di un dispositivo smorzatore di vibrazioni
WO2011064348A1 (en) * 2009-11-27 2011-06-03 Indesit Company S.P.A. Laundry treating machine provided with a vibration damper device
CN102859062A (zh) * 2010-04-26 2013-01-02 株式会社东芝 洗涤机以及干燥机
EP2565317A1 (de) * 2010-04-26 2013-03-06 Kabushiki Kaisha Toshiba Waschmaschine und trockner
EP2565317A4 (de) * 2010-04-26 2013-10-23 Toshiba Kk Waschmaschine und trockner
CN102859062B (zh) * 2010-04-26 2016-05-04 株式会社东芝 洗涤机以及干燥机
US9359705B2 (en) 2010-04-26 2016-06-07 Kabushiki Kaisha Toshiba Washing machine and drying machine
US8851247B2 (en) 2010-05-21 2014-10-07 Kabushiki Kaisha Toshiba Damper, washing machine and washing/drying machine
WO2012089453A1 (en) 2010-12-27 2012-07-05 Arcelik Anonim Sirketi A washing machine comprising a vibration damper
CN103103718A (zh) * 2011-11-11 2013-05-15 三星电子株式会社 滚筒洗衣机
EP3106710A1 (de) * 2015-06-15 2016-12-21 Airbus Defence and Space GmbH Schwingungsdämpfervorrichtung
WO2017064655A1 (en) * 2015-10-16 2017-04-20 Bitron S.P.A. Process for measuring and controlling an operational parameter of a washing machine

Also Published As

Publication number Publication date
CA2645978A1 (en) 2009-06-18
US20090151398A1 (en) 2009-06-18

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