EP3498906A1 - Commande de vibration dans une machine à laver - Google Patents

Commande de vibration dans une machine à laver Download PDF

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Publication number
EP3498906A1
EP3498906A1 EP17207616.8A EP17207616A EP3498906A1 EP 3498906 A1 EP3498906 A1 EP 3498906A1 EP 17207616 A EP17207616 A EP 17207616A EP 3498906 A1 EP3498906 A1 EP 3498906A1
Authority
EP
European Patent Office
Prior art keywords
drum
movable drum
sections
actuator
center axis
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Withdrawn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
EP17207616.8A
Other languages
German (de)
English (en)
Inventor
Muhammet Kürsat SARIARSLAN
Ömür ÖCAL
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.)
Vestel Elektronik Sanayi ve Ticaret AS
Original Assignee
Vestel Elektronik Sanayi ve Ticaret AS
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 Vestel Elektronik Sanayi ve Ticaret AS filed Critical Vestel Elektronik Sanayi ve Ticaret AS
Priority to EP17207616.8A priority Critical patent/EP3498906A1/fr
Priority to TR2017/22195A priority patent/TR201722195A1/tr
Publication of EP3498906A1 publication Critical patent/EP3498906A1/fr
Withdrawn legal-status Critical Current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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/16—Imbalance
    • 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
    • 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
    • D06F37/02—Rotary receptacles, e.g. drums

Definitions

  • the present disclosure generally relates to the field of control of vibration of a device. More specifically, the present disclosure relates to a system for controlling vibration of a washing machine and to a method thereof.
  • the drum type washing machine comprises a drum that rotates on a center axis in order to wash and spin-dry a laundry inside of the drum. During the spin-drying process, however, vibration is one of the most common and crucial problems with the washing machine.
  • a system for controlling vibration of a washing machine comprises a drum having a plurality of movable drum sections, a plurality of driving units each of which is connected to each of the plurality of movable drum sections and configured to move a corresponding movable drum section, a plurality of weight sensors each of which is connected to each of the plurality of movable drum sections and configured to measure weight of content placed in the corresponding movable drum section, and a controller configured to instruct at least one of the plurality of driving units to move radially the corresponding movable drum section based on the measured weight of content of each of the plurality of movable drum sections.
  • the drum of the washing machine is comprised of the plurality of movable drum sections.
  • the number of the movable drum sections may be varied depending on the specifications of the washing machine, such as various functions to be performed, a volume of the drum to contain a laundry and the like.
  • the number or positions of the plurality of driving units and the plurality of the weight sensors may be varied according to various embodiments.
  • the generated vibration can be alleviated to negligible levels or even removed completely.
  • unbalanced weight distribution of the laundry inside of the drum may be caused. Since the washing machine may start with highly fast rotation ratio of the drum during a spin-drying process, if there is the unbalanced weight distribution inside of the drum, it causes directional force on a center axis. In order to resolve the directional force on the center axis, the distance between the center axis and the content, i.e., a portion of the laundry placed in at least one of the plurality of movable drum sections may be adjusted to compensate the unbalanced weight distribution of the laundry inside of the drum.
  • the corresponding content i.e., the corresponding portion of the laundry may be moved accordingly. Then, the centrifugal force on the center axis of the drum can become no longer directional. Thus, the vibration of the washing machine can be easily and effectively controlled.
  • the controller may further calculate a center of gravity of the drum based on the measured weight of content of each of the plurality of movable drum sections. For example, a size of the drum, a position of each of the plurality of the movable drum sections and a distance to each other may be standardized and stored in a memory of the controller in advance when manufacturing the washing machine. Thus, for example, when each of the plurality of weight sensors measures the weight of the content in the corresponding movable drum section and transmit the measured weights to the controller, the controller may easily obtain further information regarding the content, i.e., the laundry in the drum.
  • the obtained information may comprise which movable drum section contains the content, how heavy each of the content is, how far each of the content is positioned from the center axis of the drum or how far the content is positioned from each other.
  • Methods for calculating a center of gravity based on the above exemplified information are well known in the art and therefore will not be described here in detail except one example as follows.
  • the foregoing example is illustrative only and is not intended to be in any way limiting. Any such method now known or known in the future can be used for this purpose.
  • the center of gravity may be easily calculated.
  • D corresponds to 2 r , where r is a radius of the drum.
  • the controller may further measure a difference in distance between the calculated center of gravity of the drum and the center axis of the drum.
  • the center axis may be vertically extended lines from a point where a rotor and the drum connect and the drum may rotate on the center axis.
  • the controller may determine whether the difference is in a threshold range.
  • the threshold range may be determined appropriately depending on the various embodiments. For example, the threshold range may be determined to the extent that the generated vibration is negligible.
  • the controller may further select at least one of the plurality of movable drum sections to move to adjust the difference to be in the threshold range when it is determined that the difference is out of the threshold range, and instruct the at least one of the plurality of driving units to move the selected at least one of the plurality of movable drum sections parallel to the center axis of the drum in a direction radially either towards or away from the center axis of the drum.
  • the distance of the content to each other placed in the at least one of the plurality of movable drum sections may be adjusted to compensate the unbalanced weight distribution of the laundry inside of the drum.
  • the corresponding contents i.e., the corresponding portion of the laundry may be moved accordingly. Then, the centrifugal force on the center axis of the drum can become no longer directional and the vibration of the washing making can be effectively controlled.
  • performance of the washing machine may be further considered when determination is made. For example, it may not be proper to move radially a movable drum section too close to the center axis of the drum as it may negatively impact on the performance of the washing machine.
  • an additional threshold range may be set regarding what to extent the movable drum section to be moved parallel to the center axis in a direction radially towards the center axis of the drum.
  • D1 is to be shorter than D2 in terms of the formula (2). Since, with the initial condition, the two movable drum sections are regarded as positioned in a distance of r from the center axis of the drum, it may not be possible to move the two movable drum sections parallel to the center axis in a direction radially further away from the center axis of the drum. Also, since D1 is to be shorter than D2, it may not be appropriate to move the movable drum section containing the content with M2 parallel to the center axis in a direction radially towards the center axis of the drum.
  • the movable drum section containing the content with M1 should be much more moved parallel to the center axis in a direction radially towards the center axis of the drum, which may cause the movable drum section containing the content with M1 to be positioned too close to the center axis of the drum.
  • the controller may further select at least one of the plurality of movable drum sections to move to adjust preferably the difference to be zero such that the center of gravity of the drum is positioned on the center axis of the drum.
  • the distance D1 and D2 can be newly adjusted and the corresponding content can be moved radially accordingly.
  • the vibration can be removed completely.
  • the controller may further select one of the two movable drum sections to move mainly based on the formula (2), and instruct the corresponding driving unit to move the selected movable drum section parallel to the center axis of the drum in a direction radially either towards or away from the center axis of the drum.
  • the above mentioned steps may be periodically performed by the plurality of driving units, the plurality of weight sensors and the controller to effectively control the vibration of the washing machine while executing any performance of the washing machine. It will be understood by those skilled in the art that above calculation methods and details thereof may be varied depending on various embodiments.
  • Each of the plurality of driving units may further comprise an actuator configured to move the corresponding movable drum section, wherein the actuator may be at least one of a hydraulic actuator, a pneumatic actuator, an electric actuator, a mechanical actuator, a magnetic actuator and a thermal actuator.
  • each of the plurality of driving units may further comprise a shaft and a gear.
  • the gear may be connected to the actuator and the shaft, and the shaft may be connected to the actuator and configured to support the corresponding movable drum section.
  • the actuator may be driven by the controller to move the gear and thereby the shaft to move the corresponding movable drum section supported by the shaft parallel to the center axis of the drum in a direction radially either towards or away from the center axis of the drum.
  • the system may further comprise at least one flexible connector configured to connect the plurality of movable drum sections to each other.
  • the at least one flexible connector may be made from any material with flexibility or elasticity such as a synthetic rubber.
  • the at least one flexible connector may be lengthened to connect the corresponding movable drum section to the other movable drum sections when the corresponding movable drum section is moved radially by the at least one of the plurality of the driving units.
  • a method controlling vibration of a washing machine and tis provided.
  • the method may be performed by the system according to the first aspect. All apparatus features described herein with reference to the first aspect may thus also be embodied as functions, services or steps in the method of the second aspect.
  • FIG. 1 schematically illustrates an exemplary composition of a system 100 for controlling vibration of a washing machine.
  • the system 100 incorporates a drum 110 having a plurality of movable drum sections 111, 112, 113, 114, 115, 116, 117, 118, a plurality of driving units 201, 202, 203, 204, 205, 206, 207, 208, a plurality of weight sensors 301, 302, 303, 304, 305, 306, 307, 308 and a controller 500.
  • the drum 110 has the eight movable drum sections and also the corresponding number of the driving units and weight sensors, the number and also positions of the above components may be varied according to various embodiments.
  • content 403 i.e., a portion of the laundry is positioned in the movable drum section 113 and content 407, i.e., another portion of the laundry is positioned in the movable drum section 117.
  • the plurality driving units 201, 202, 203, 204, 205, 206, 207, 208 may be connected to each of the plurality of movable drum sections 111, 112, 113, 114, 115, 116, 117, 118.
  • the plurality weight sensors 301, 302, 303, 304, 305, 306, 307, 308 may also be connected to each of the plurality of movable drum sections 111, 112, 113, 114, 115, 116, 117, 118 and measure weight of content placed in the corresponding movable drum section.
  • the weight sensor 303 may measure the weight of the content 403 of the movable drum section 113
  • the weight sensor 307 may measure the weight of the content 407 of the movable drum section 117.
  • Other weights measured by the other weight sensors 301, 302, 304, 305, 306, 308 may correspond to zero or nearly zero.
  • the controller 500 may instruct at least one of the driving units 203, 207 to move radially the corresponding movable drum section 113, 117 based on the measured weights of the contents 403, 407. For example, when there is a difference between the weights of the contents 403, 407, the movable drum section 117 may be moved radially to compensate the unbalanced weight distribution of the laundry inside of the drum 110 as seen from Figure 1(a) to Figure 1(b) . Then, the centrifugal force on a center axis O of the drum 110 can become no longer directional. Thus, the vibration of the washing machine can be easily and effectively controlled.
  • the controller 500 may further calculate a center of gravity X of the drum 110 based on the measured weight of contents 403, 407. Then, the controller 500 may further measure a difference in distance between the calculated center of gravity X of the drum 110 and the center axis Oof the drum 110, and determine whether the difference is in a threshold range.
  • the controller 500 may further select at least one of the movable drum sections 113, 117 to move to adjust the difference to be in the threshold range, and instruct the at least one of the driving units 203, 207 to move the selected at least one of the movable drum sections 113, 117 parallel to the center axis O of the drum 110 in a direction radially either towards or away from the center axis O of the drum 110.
  • the controller may further select at least one of the movable drum sections 113, 117 to move to adjust the difference to be zero such that the center of gravity X of the drum 110 is positioned on the center axis O of the drum 110.
  • the contents, 403, 407 of the laundry are respectively positioned at the movable drum sections 113, 117, each of which is on either side of the drum 110 and thus faces each other.
  • the two movable drum sections 113, 117 may be positioned in a distance of r from the center axis of the drum, where r is a radius of the drum 110. In this example, it may be assumed the radius r is 30cm.
  • D1 is computed at 24cm
  • D2 is computed at 36cm
  • d is figured out at 6cm.
  • the threshold range is 1cm, which may be determined to the extent that the generated vibration is negligible.
  • the difference is out of the threshold range and at least one of the movable drum sections 113, 117 may thus be moved radially to preferably adjust the difference to be zero such that the center of gravity X of the drum 110 is positioned on the center axis O of the drum 110.
  • the controller may select to move only the movable drum section 113 containing the content 403 with 3kg parallel to the center axis in a direction radially towards the center axis of the drum 110.
  • D2 is newly adjusted to 30cm
  • D1 is newly computed at 20cm.
  • the movable drum section 113 containing the content 403 with 3kg can be moved parallel to the center axis O of the drum 110 in a direction radially towards the center axis O of the drum 110 by 10cm as shown in Figure 1(b) .
  • the vibration can be removed completely.
  • Each of the plurality of driving units 201, 202, 203, 204, 205, 206, 207, 208 may further comprise an actuator, a shaft and a gear. More detailed descriptions relating to the plurality of driving units 201, 202, 203, 204, 205, 206, 207, 208 will be provided with regard to Figure 2 below.
  • the system 100 may further comprise at least one flexible connector 601, 602, 603, 604, 605, 606, 607, 608 configured to connect the plurality of movable drum sections to each other.
  • the at least one flexible connector 601, 602, 603, 604, 605, 606, 607, 608 may be made from any material with flexibility or elasticity such as a synthetic rubber.
  • the at least one flexible connector 603, 604 may be stretched to connect the corresponding movable drum section 113 to the other movable drum sections 112, 114 when the corresponding movable drum section 113 is moved radially by the driving unit 203.
  • the at least one flexible connecter is illustrated as a separated component, the at least one flexible connector may be implemented as an integrated form to connect the plurality of movable drum sections as whole.
  • FIG. 2 schematically illustrates an example of a driving unit 201, 202, 203, 204, 205, 206, 207, 208 of the system 100.
  • Each of the plurality of driving units 201, 202, 203, 204, 205, 206, 207, 208 may further comprise an actuator 210 configured to move the corresponding movable drum section.
  • the actuator may be at least one of a hydraulic actuator, a pneumatic actuator, an electric actuator, a mechanical actuator, a magnetic actuator and a thermal actuator.
  • each of the plurality of driving units 201, 202, 203, 204, 205, 206, 207, 208 may further comprise a shaft 230 and a gear 220.
  • the gear 220 may be connected to the actuator 210 and the shaft 230.
  • the shaft 230 may be connected to the actuator 210 and configured to support the corresponding movable drum section.
  • the actuator 210 may be driven by the controller 500 to move the gear 220 and thereby the shaft 230 to move the corresponding movable drum section supported by the shaft 230 parallel to the center axis of the drum in a direction radially either towards or away from the center axis of the drum.
  • the actuator 210 may receive an electrical signal from the controller 500 and turn the gear 220 either clockwise or counterclockwise. Then, the gear 220 may consequently move the shaft 230. Depending on the direction, i.e., either clockwise or counterclockwise, the shaft 230 may move in a direction radially either towards or away from the center axis of the drum 110. Thus, the corresponding movable drum section supported by the shaft 230 may be moved in an intended direction.
  • FIG. 3 schematically illustrates a flowchart of a method for controlling vibration of a washing machine having a drum, i.e., the drum 110 being comprised of a plurality of movable drum sections i.e., the plurality of movable drum sections 111, 112, 113, 114, 115, 116, 117, 118.
  • the method begins at step S201, at which a plurality of weight sensors measure weight of content placed in each of the plurality of movable drum sections.
  • a controller instructs at least one of a plurality of driving units to move radially at least one of the plurality of movable drum sections based on the measured weight of content of each of the plurality of movable drum sections.
  • the method may be further repeatedly performed with a certain period by a system for controlling vibration, i.e., the system 100.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP17207616.8A 2017-12-15 2017-12-15 Commande de vibration dans une machine à laver Withdrawn EP3498906A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17207616.8A EP3498906A1 (fr) 2017-12-15 2017-12-15 Commande de vibration dans une machine à laver
TR2017/22195A TR201722195A1 (tr) 2017-12-15 2017-12-27 Bi̇r çamaşir maki̇nesi̇ndeki̇ ti̇treşi̇m kontrolü

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17207616.8A EP3498906A1 (fr) 2017-12-15 2017-12-15 Commande de vibration dans une machine à laver

Publications (1)

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EP3498906A1 true EP3498906A1 (fr) 2019-06-19

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EP17207616.8A Withdrawn EP3498906A1 (fr) 2017-12-15 2017-12-15 Commande de vibration dans une machine à laver

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EP (1) EP3498906A1 (fr)
TR (1) TR201722195A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB625926A (en) * 1945-10-03 1949-07-06 Appliance Corp Of America Improvements in or relating to washing machines, particularly laundry machines
US2530822A (en) * 1945-03-24 1950-11-21 Leo M Kahn Variable volume washer
US20060243002A1 (en) * 2005-04-27 2006-11-02 Maytag Corporation Contracting spinner for clothes washer
JP2007135812A (ja) * 2005-11-17 2007-06-07 Samsung Electronics Co Ltd 洗濯機
DE102011083014A1 (de) * 2011-09-20 2013-03-21 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrommel mit Trommelprofil für verbesserte Schleuderwirkung
CN206553767U (zh) * 2017-02-26 2017-10-13 张卫 变形滚筒式洗衣机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530822A (en) * 1945-03-24 1950-11-21 Leo M Kahn Variable volume washer
GB625926A (en) * 1945-10-03 1949-07-06 Appliance Corp Of America Improvements in or relating to washing machines, particularly laundry machines
US20060243002A1 (en) * 2005-04-27 2006-11-02 Maytag Corporation Contracting spinner for clothes washer
JP2007135812A (ja) * 2005-11-17 2007-06-07 Samsung Electronics Co Ltd 洗濯機
DE102011083014A1 (de) * 2011-09-20 2013-03-21 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrommel mit Trommelprofil für verbesserte Schleuderwirkung
CN206553767U (zh) * 2017-02-26 2017-10-13 张卫 变形滚筒式洗衣机

Also Published As

Publication number Publication date
TR201722195A1 (tr) 2019-07-22

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