EP1243686A1 - Dispositif pour le contrôle des oscillations d'un ensemble cuve-tambour pour des machines à laver domestiques - Google Patents

Dispositif pour le contrôle des oscillations d'un ensemble cuve-tambour pour des machines à laver domestiques Download PDF

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Publication number
EP1243686A1
EP1243686A1 EP02004731A EP02004731A EP1243686A1 EP 1243686 A1 EP1243686 A1 EP 1243686A1 EP 02004731 A EP02004731 A EP 02004731A EP 02004731 A EP02004731 A EP 02004731A EP 1243686 A1 EP1243686 A1 EP 1243686A1
Authority
EP
European Patent Office
Prior art keywords
tub
braking
oscillations
bell
drum
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Withdrawn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
EP02004731A
Other languages
German (de)
English (en)
Inventor
Paolo Fornasari
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.)
R& Ds Srl
Original Assignee
R& Ds Srl
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 R& Ds Srl filed Critical R& Ds Srl
Publication of EP1243686A1 publication Critical patent/EP1243686A1/fr
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • 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
    • D06F2103/26—Imbalance; Noise level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply

Definitions

  • the present invention refers to an arrangement for controlling the oscillations of the suspended tub-drum assembly of clothes washing machines for both home and professional use, that is adapted to detect the oscillations of said suspended assembly in view of both effectively dampen said oscillations of said assembly, when the drum thereof is driven to rotate at high spin-extraction revolution speeds, and controlling the manner in which certain particular operational functions of the machine are carried out in accordance with the extent or amplitude of the detected oscillations.
  • Vibration-damping arrangements of various kinds are known in the art, which are currently used as damper means to deaden the oscillations of the suspended tub-drum assembly, which are typically induced in clothes washing machines when the washload-holding drum is driven to rotate at the high spin-extraction speeds thereof, in which said damper means are generally connected between the lower or bottom portion of each suspended tub-drum assembly and the bottom portion of the outer casing of the respective washing machine, and in which said damper means are generally constituted by an internally hollow cylinder and a cylindrical rod provided with friction surfaces of a suitable material and capable of alternately sliding within such inner cavity of said cylinder during the oscillatory displacements of said suspended assembly, as brought about by said drum rotating at its various washing and spin-extraction speeds, in such a manner as to give rise to braking actions aimed at dampening such oscillations.
  • Damper means of this kind are suitable for use in conjunction with clothes washing machines capable of spin-extracting at relatively high revolution speeds of the drum (i.e. up to approx. 900 rpm), but are rather critical if considered for use in conjunction with the washing machines that are currently manufactured with higher spin-extraction speed capabilities in view of improving the subsequent clothes drying process, owing to the fact that, under these conditions, it turns out as particularly difficult to be capable of effectively dampening the oscillations of the suspended tub-drum assembly through most intense braking actions.
  • FIG. 1 is shown to schematically illustrate a clothes washing machine 10, which may be of the type for both home and professional use, comprising an outer cabinet 11 resting with its bottom portion on the floor, in which there is suspended assembly formed by an outer washing tub 12 and a washload-holding drum 13 housed inside said tub, wherein said assembly is suspended in the machine by means of upper suspension springs 14 attached between the upper portion of the casing 11 and the tub 12, and lower vibration-damping or shock-absorber struts 15 provided between said tub and the bottom portion 16 of the outer casing of the machine, in which each one of said vibration-damping strut is formed by an internally hollow casing 17 and a rod 18 capable of alternately sliding within the internal cavity 19 of said hollow casing, wherein the two free ends of said hollow casing and said rod are pivotally joined with the bottom portion 16 of the outer casing of the machine and the bottom portion of the tub 12, respectively.
  • a clothes washing machine 10 which may be of the type for both home and professional use, comprising an outer cabinet 11 resting with its bottom
  • the clothes washing machine further comprises a control arrangement according to the present invention, which is intended for dampening, in conjunction with the vibration-damping struts 15, the oscillations of the suspended tub-drum assembly that are generated during the rotation of the washload-holding drum at the different washing and spin-extraction speeds, in which said control arrangement is substantially constituted by the vibration-damping struts themselves, as conformed in the manner that shall be described in greater detail further on, and at least a sensor 20 adapted to detect the out-of-balance conditions of the suspended tub-drum assembly, and associated to at least one of said vibration-damping struts, as well as an electronic control unit 21 applied preferably against the base or bottom 16 of the outer casing of the machine, in which said sensor and said electronic control unit are connected with each other via electric conductor leads 22 and are arranged so as to be capable of interacting with each other in the manner that shall be more closely described further on.
  • a control arrangement according to the present invention, which is intended for dampening, in conjunction with the vibration-dam
  • FIGS 2 and 3 are at this point shown to illustrate one of said vibration-damping struts 15 (two such struts, in this case), the internally hollow casing 17 of which is shaped so as to feature a rectilinear and elongated box-like portion 23, delimiting the internal cavity 19 in which said rod 18 is capable of sliding alternately, and a circular box-like portion 24 joined laterally to said elongated box-like portion 23, and featuring smaller dimensions than the latter, which delimits a corresponding internal cavity 25 intended to accommodate the component parts that will be described below.
  • Such an elongated box-like portion 23 is provided with an open end portion 26, enabling the sliding rod 18 to be inserted in the internal cavity 19, and a closed end portion 27 showing a tapered shape and provided with a transversal through-hole 28 for admitting the passage of a corresponding pivotally hinging pin 29 (see Figure 1) for the attachment of said casing 17 on to corresponding support plates 30 secured to the bottom portion 16 of the outer casing of the machine.
  • the sliding rod 18 is made out of a single piece 31 of a rectilinear, elongated box-like form, slidably adaptable to the internal cavity 19 of said elongated box-like portion 23 of the strut, in which said rod is further provided with side recesses 32 extending along almost the entire longitudinal extension thereof, as well as a front plane surface 33 and an opposite rear surface 34 provided with a rack portion 35, in which said plane surface 33 is arranged to co-operate with a friction shoe 36 of a suitable anti-friction material, secured against the opposite inner surface of the elongated box-like portion 23 and acting as an element adapted to prevent the surfaces of this elongated box-like portion and the rod from wearing down during the alternate siding motion of the rod.
  • the rack portion 35 extends in turn almost over the whole length of the rod 18 and is provided in order to determine the transmission of the movement, with the component parts that will be described further on, during the longitudinal alternating sliding motion of the same rod within said elongated box-like portion 23.
  • the toothing 37 of said rack portion 35 is advantageously made to a bi-helical type of conformation, i.e. with two longitudinal half-serrations 38 and 39 inclined in symmetrically opposed directions with respect to each other, so as to determine in this way a low-noise motion transmission under conditions of an enhanced mechanical strength.
  • the circular box-like portion 24 is provided with a corresponding circular cap, or bell 40, which has a slightly smaller size than the circular portion 24 itself and is housed inside the latter, wherein said circular bell is conformed with a plane rear wall 41 and a frontally open peripheral wall 42 joining with said rear wall 41, and is rotatably supported by a pin 43 firmly joined therewith and inserted with its end portions in corresponding seats or receptacles 44 and 45 provided in the hollow casing 17, in which a pinion gear 46 is furthermore shrink-fitted on to said pin in a position lying between the end portions thereof, wherein said pinion gear is provided with a toothing that is similar to the one of the rack portion 35, i.e. a bi-helical toothing in this case, to be in this way capable of meshing with the toothing of said rack portion 35.
  • a pinion gear 46 is furthermore shrink-fitted on to said pin in a position lying between the end portions thereof, wherein said pinion gear is provided with a toothing that
  • crescent-shaped braking shoes 47 (see Figures 4 to 6) identical to each other and arranged in a symmetrical position with respect to each other, in which said braking shoes are provided with respective end portions 48 that are pivotally hinged on to said circular box-like portion 24 by means of corresponding pins 49, as well as respective other free end portions 50 arranged opposite to and spaced from each other, between which there are interposed two mutually independent movable cores, i.e. slugs 51 of an electromagnet 52.
  • Each such movable core 51 is provided with a head 53, which is facing the opposite end portion 50 of the related braking shoe, and is permanently biased by at least a central spring 54, which is housed in corresponding cavities 55 of said movable cores 51, to compress the related head against the opposite end portion of braking shoe.
  • These braking shoes furthermore, are held in position by means of at least a spring 56, the end portions of which are linked up in proximity of the corresponding pivotally hinged end portions 48 of the same braking shoes, wherein such a spring keeps said braking shoes biased towards each other with a less intensive action than that of said central spring 54.
  • the braking shoes are shaped so as to feature a corresponding circular outer surface 57 facing the opposite circular inner surface 58 of the bell 40, slightly spaced from the latter, wherein in said surface there is provided a respective seat 50 for housing a friction shoe 60 made of a suitable anti-friction material, and adapted to come into contact with the related inner surface 58, thereby determining a braking action adapted to dampen or even stopping the rotation of the bell 40.
  • the electromagnet 52 is in turn connected via appropriate electric leads (not shown) to both the power supply and the electronic control unit 21, and this electromagnet is energized by said electronic control unit 21 so as to switch over from one to the other of its energized and de-energized conditions, with an on-off type of command, i.e. by abruptly switching the power supply of the electromagnet on and off, or a gradual type of command, i.e. by gradually varying the intensity of the current flowing across said electromagnet.
  • this electromagnet 52 acts on the movable cores 51 in such a manner that, when it is de-energized, said movable cores remain free and are therefore compressed by the central spring 54 with the heads 53 thereof against the related free end portion 50 of the corresponding braking shoe (see operating position illustrated in Figure 4), under resulting compression of the friction shoes 60 against the inner surface 58 of the bell 40, which is in this way braked, and when said electromagnet is on the contrary energized (see operating position illustrated in Figure 5), said movable cores are attracted towards each other, against the action of said central spring 54, while the braking shoe are no longer compressed by said movable cores and therefore, owing to them not being pushed by said internal spring 54 any longer, are biased by the action of the other spring 56 into displacing towards each other, into a position in which the friction shoes 60 are moved apart from the inner surface 58 of the bell 40, with the result that the latter is capable of rotating freely.
  • the vibration-damping strut made in the above-described manner is capable of bringing about a braking action (due to the compression of the friction shoes 60 against the bell 40) that enables the oscillations of the suspended tub-drum assembly of the machine to be effectively and quickly dampened even in the presence of the quite high mechanical loads that are produced when the drum is driven to rotate at extremely high spin-extraction revolution speeds or in the critical intermediate phases thereof.
  • this braking action is brought about in a most reliable, certain manner even in the case of possible accidental failures of the power supply to the washing machine, thanks to the circumstance that the electromagnet remains actually de-energized in this operating condition.
  • the senor 20 is used to detect the intensity, i.e. extent of the mechanical oscillations and the out-of-balance condition of the suspended tub-drum assembly of the machine, and is adapted to generate corresponding electric signal in response thereto, which are sent to the electronic control unit 21 that is in turn adapted to process these electric signals and convert them into electric voltages of a correspondingly variable intensity, which are ultimately applied to the electromagnet 52 that is in this way enabled to bring about corresponding braking actions performed on the vibration-damping strut according to the same operating principles as described above.
  • the electronic sensor 20 which may be of a traditional kind (eg. an optical reader), is inserted through the circular box-like portion 24 in such a manner that its sensitive portion 61 is facing the opposite surface of the peripheral wall 42 of the circular bell 40, from which it is slightly spaced, wherein various dents or reference marks 62 applied in an indelible manner and distributed in a circular pattern all along the same surface, in such positions as to enable them to selectively come to coincide with the sensor 20 during the rotation of the bell 40.
  • various dents or reference marks 62 applied in an indelible manner and distributed in a circular pattern all along the same surface, in such positions as to enable them to selectively come to coincide with the sensor 20 during the rotation of the bell 40.
  • This sensor also allows for the measurement of the vertical displacement of the suspended tub-drum assembly from its raised position, in the condition in which the drum is empty and the tub has not been filled with washing liquor, to its lowered position, in the condition in which the clothes to be washed have been loaded into the drum and the tub has been duly filled with washing liquor, thereby measuring the actual amount of clothes and washing liquor introduced in the dram and the tub, respectively.
  • the electronic control unit 21 is properly set to energize the electromagnet 62 at the beginning of a washing cycle, both before and after the introduction of the clothes in the drum and the washing liquor in the tub, thereby creating the condition in which there is no braking action exerted by7 the braking shoes 47 on the bell 40, so that said bell is capable of rotating freely thanks to the pushing action exerted by the rod 18 within the hollow casing 17 owing to the progressive lowering of the tub under the weight of the clothes and the washing liquor, thereby enabling the sensor 20 to read off the dents or reference marks 62 before and after such a loading of the machine, and the electronic control unit 21 to detect the actual amount of washload introduced in the tub.
  • the electronic control unit 21 causes the electromagnet 52 to be de-energized, so that the vibration-damping strut is able to perform its breaking, i.e. oscillation deadening action throughout the remaining part of the washing cycle.
  • the electric signals generated by the sensor 20, which are proportional to the amplitude of the rotation of the bell 40, and therefore to the vertical displacements, vibrations and oscillations of the tub-drum assembly, or to the vertical displacements of the tub, are received by the electronic control unit 21 which checks up the levels of these signals and compares them with the levels of reference signals that will have been previously stored in a coded form in the same electronic control unit and correspond to the various parameters relating to the desired or allowed pattern of oscillations and vibratory displacements of the suspended tub-drum assembly, or the vertical displacements of the tub, so as to be able to trigger, in accordance with the outcome of such a comparison, the desired braking action for damping such oscillations and displacements, by activating the braking operation of the vibration-damping struts in the afore described manner, or the measurement of the amount of washload introduced in the tub.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Networks Using Active Elements (AREA)
  • Centrifugal Separators (AREA)
EP02004731A 2001-03-05 2002-03-01 Dispositif pour le contrôle des oscillations d'un ensemble cuve-tambour pour des machines à laver domestiques Withdrawn EP1243686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN010021 2001-03-05
IT2001PN000021A ITPN20010021A1 (it) 2001-03-05 2001-03-05 Dispositivo di controllo delle oscillazioni del gruppo vasca-cesto dimacchina lavabiancheria

Publications (1)

Publication Number Publication Date
EP1243686A1 true EP1243686A1 (fr) 2002-09-25

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008006675A1 (fr) * 2006-07-12 2008-01-17 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour la commande du déroulement de l'essorage d'un lave-linge et lave-linge approprié pour l'exécution du procédé
DE102007028739A1 (de) * 2007-06-21 2009-01-02 Robert Seuffer Gmbh & Co. Kg Waschmaschine
DE102008039569A1 (de) 2008-08-25 2010-03-04 Robert Seuffer Gmbh & Co. Kg Aufhängevorrichtung, Wascheinrichtung und Verfahren zur Steuerung einer Wascheinrichtung
US20100154130A1 (en) * 2008-12-19 2010-06-24 Samsung Electronics Co., Ltd. Damper, washing machine with the same and control method thereof
US20110113567A1 (en) * 2009-11-16 2011-05-19 Samsung Electronics Co., Ltd. Washing machine and laundry amount detection device thereof
CN102191656A (zh) * 2010-03-05 2011-09-21 三星电子株式会社 洗衣机
WO2012089498A2 (fr) 2010-12-30 2012-07-05 Arcelik Anonim Sirketi Machine à laver
NL1038808C2 (nl) * 2011-04-07 2012-10-09 Bolk Techniek Trommelwasmachine, wasmachine.
RU2469139C2 (ru) * 2009-11-16 2012-12-10 Самсунг Электроникс Ко., Лтд. Стиральная машина и способ управления стиральной машиной
US20140026623A1 (en) * 2012-07-30 2014-01-30 Keunjoo Kim Laundry processing machine
CN104746283B (zh) * 2013-12-25 2017-01-04 海尔集团技术研发中心 一种家用干洗机及控制方法
US20180371673A1 (en) * 2017-06-22 2018-12-27 Haier Us Appliance Solutions, Inc. Washing machine appliance and methods of operation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1411147A (en) * 1972-01-26 1975-10-22 Siemens Elektrogeraete Gmbh Machine having resiliently mounted rotatable drum
JPH04371194A (ja) * 1991-06-18 1992-12-24 Matsushita Electric Ind Co Ltd ドラム式洗濯機
EP0965675A1 (fr) * 1998-06-16 1999-12-22 R.& D.S. S.r.l. Dispositif pour le contrÔle des oscillations d'un ensemble cuve-tambour de machine à laver, en particulier de machine à laver le linge
EP0984092A1 (fr) * 1998-09-02 2000-03-08 Miele & Cie. GmbH & Co. Machine à laver avec dispositif pour déterminer le poids du linge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1411147A (en) * 1972-01-26 1975-10-22 Siemens Elektrogeraete Gmbh Machine having resiliently mounted rotatable drum
JPH04371194A (ja) * 1991-06-18 1992-12-24 Matsushita Electric Ind Co Ltd ドラム式洗濯機
EP0965675A1 (fr) * 1998-06-16 1999-12-22 R.& D.S. S.r.l. Dispositif pour le contrÔle des oscillations d'un ensemble cuve-tambour de machine à laver, en particulier de machine à laver le linge
EP0984092A1 (fr) * 1998-09-02 2000-03-08 Miele & Cie. GmbH & Co. Machine à laver avec dispositif pour déterminer le poids du linge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 243 (C - 1058) 17 May 1993 (1993-05-17) *

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101490329B (zh) * 2006-07-12 2011-05-25 Bsh博世和西门子家用器具有限公司 洗衣机旋转甩干循环的控制方法及实现该方法的洗衣机
WO2008006675A1 (fr) * 2006-07-12 2008-01-17 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour la commande du déroulement de l'essorage d'un lave-linge et lave-linge approprié pour l'exécution du procédé
DE102007028739A1 (de) * 2007-06-21 2009-01-02 Robert Seuffer Gmbh & Co. Kg Waschmaschine
DE102007028739B4 (de) * 2007-06-21 2012-02-23 Seuffer Gmbh & Co.Kg Waschmaschine
DE102008039569A1 (de) 2008-08-25 2010-03-04 Robert Seuffer Gmbh & Co. Kg Aufhängevorrichtung, Wascheinrichtung und Verfahren zur Steuerung einer Wascheinrichtung
DE102008039569B4 (de) * 2008-08-25 2013-05-16 Seuffer Gmbh & Co.Kg Aufhängevorrichtung, Wascheinrichtung und Verfahren zur Steuerung einer Wascheinrichtung
US20100154130A1 (en) * 2008-12-19 2010-06-24 Samsung Electronics Co., Ltd. Damper, washing machine with the same and control method thereof
EP2202344A3 (fr) * 2008-12-19 2010-10-20 Samsung Electronics Co., Ltd. Amortisseur, machine à laver dotée de celui-ci et procédé de commande correspondant
EP2202344A2 (fr) * 2008-12-19 2010-06-30 Samsung Electronics Co., Ltd. Amortisseur, machine à laver dotée de celui-ci et procédé de commande correspondant
US8302433B2 (en) * 2008-12-19 2012-11-06 Samsung Electronics Co., Ltd. Damper, washing machine with the same and control method thereof
US20110113567A1 (en) * 2009-11-16 2011-05-19 Samsung Electronics Co., Ltd. Washing machine and laundry amount detection device thereof
US8776552B2 (en) * 2009-11-16 2014-07-15 Samsung Electronics Co., Ltd. Washing machine and laundry amount detection device thereof
RU2469139C2 (ru) * 2009-11-16 2012-12-10 Самсунг Электроникс Ко., Лтд. Стиральная машина и способ управления стиральной машиной
CN102191656A (zh) * 2010-03-05 2011-09-21 三星电子株式会社 洗衣机
WO2012089498A2 (fr) 2010-12-30 2012-07-05 Arcelik Anonim Sirketi Machine à laver
WO2012089498A3 (fr) * 2010-12-30 2013-07-04 Arcelik Anonim Sirketi Machine à laver
NL1038808C2 (nl) * 2011-04-07 2012-10-09 Bolk Techniek Trommelwasmachine, wasmachine.
US20140026623A1 (en) * 2012-07-30 2014-01-30 Keunjoo Kim Laundry processing machine
US10011936B2 (en) * 2012-07-30 2018-07-03 Lg Electronics Inc. Laundry processing machine
CN104746283B (zh) * 2013-12-25 2017-01-04 海尔集团技术研发中心 一种家用干洗机及控制方法
US20180371673A1 (en) * 2017-06-22 2018-12-27 Haier Us Appliance Solutions, Inc. Washing machine appliance and methods of operation
US10626538B2 (en) * 2017-06-22 2020-04-21 Haier Us Appliance Solutions, Inc. Washing machine appliance and methods of operation

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