EP3382084A1 - Bestimmung einer unwucht innerhalb eines waschbehälters einer waschmaschine - Google Patents

Bestimmung einer unwucht innerhalb eines waschbehälters einer waschmaschine Download PDF

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Publication number
EP3382084A1
EP3382084A1 EP17162971.0A EP17162971A EP3382084A1 EP 3382084 A1 EP3382084 A1 EP 3382084A1 EP 17162971 A EP17162971 A EP 17162971A EP 3382084 A1 EP3382084 A1 EP 3382084A1
Authority
EP
European Patent Office
Prior art keywords
damping force
suspension system
wash basket
wash
washing machine
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Withdrawn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
EP17162971.0A
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English (en)
French (fr)
Inventor
Irfan KARAZOR
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 EP17162971.0A priority Critical patent/EP3382084A1/de
Publication of EP3382084A1 publication Critical patent/EP3382084A1/de
Withdrawn legal-status Critical Current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
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/268—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for suspension devices
    • 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
    • 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
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis

Definitions

  • This invention refers to an arrangement within the washing machine according to claim 1, a washing machine according to claim 8, a method for providing an arrangement within the washing machine according to claim 10, and a method for determining an imbalance within a wash basket of a washing machine to claim 11.
  • Conventional washing machines include a cabinet which receives a stationary tub.
  • the tub further includes a wash basket which contains wash load and rinse water for washing.
  • a drive assembly and a brake assembly is positioned with respect to the tub and configured to rotate and control the rotation of the wash basket within the tub to cleanse the wash load placed into the wash basket.
  • water is typically extracted from the wash load by rotating the wash basket containing the wash load at high rotational speeds. Centrifugal forces pull the majority of the water out of the wash load and through perforations in the rotating basket.
  • a pump assembly can be used to rinse and drain the extracted water to a draining system.
  • the wash basket is typically supported by a suspension system designed to dampen translational motion induced by any imbalance within the rotating basket.
  • High stresses are sometimes encountered within the wash basket, drive system, and suspension system during high-speed spin action used for water extraction during normal wash cycles and may create imbalance within the wash basket.
  • a force is generated which is proportional to the product of the mass of the wash load, the distance between the wash load and the center of rotation of the tub, and the square of the velocity of the tub. Small unbalances in the wash load can very easily generate large forces as a result of the high rotational velocities that may cause imbalance within the wash basket, and further causes excess vibration and noise which may cause damage to the washing machine
  • Known washing machines employs various sensing techniques to determine, if the machine is operating with an unbalanced load.
  • One such technique includes current or load sensing in motor rotating control. When an unbalanced load is detected during an extraction spin cycle, the machine is stopped and a signal is generated to alert the user regarding the unbalanced load. Sensing techniques involving current or load sensing in the motor control can be inaccurate due to additional loads on the motor other than the load provided by any imbalance
  • the object of the present invention is to provide a mechanism in a washing machine for determining an imbalance within a wash basket of the washing machine with accuracy.
  • the arrangement determines an imbalance within a wash basket of a washing machine, wherein the washing machine comprises a cabinet enclosing a tub which includes the wash basket and two or more linking members linking the tub to the cabinet.
  • the wash basket is adapted to be in translational motion during rotation due to an unbalance in wash load.
  • the arrangement includes a suspension system, a sensor and a microcontroller.
  • the suspension system is placed within the linking members and generates a damping force to dampen translational motion of the wash basket.
  • the sensor measures the damping force in each of the suspension system, and generates a damping force data based on the measured damping force for each of the suspension system.
  • the microcontroller receives the damping force data of each of the suspension system, and processes the damping force data to determine an imbalance within the wash basket.
  • the washing machine comprises four linking members.
  • This embodiment provides is beneficial as it provides better balancing during the translational motion of the wash basket. Also, damping force data collected from four suspension system can provide more accurate estimation of imbalace within the wash basket.
  • the suspension system is of semi-active type, wherein this embodiment is beneficial, as it provides better stability with respect to passive suspension system.
  • the semi-active system uses external power only to adjust the damping levels and to power some components of the suspension system.
  • the suspension system includes a piston, a foam covering the piston, and a case.
  • the foam covering the piston is enclosed within the case, such that, the damping force is obtained as friction between the foam and the case.
  • the foam is saturated with magnetorheological fluid, and by applying a magnetic field to the foam, friction level between the foam and the case changes.
  • This embodiment is beneficial, as it allows an effective way to control and change damping characterstics of the suspension system continously based on load due to rotation of the wash load or due to translational motion of the wash basket.
  • the microcontroller processes the damping force data received from each of the suspension system, and identifies a difference of force in each of the suspension system with respect to other suspension system of the washing machine.
  • This embodiment is beneficial, as it provides an accurate way to determine imbalance within the wash basket.
  • the before mentioned object is also solved by a washing machine of Claim 8.
  • the washing machine includes a cabinet comprising a tub, a wash basket placed within the tub, two or more linking members linking the tub to the cabinet, and an arrangement to identify an imbalance within the wash basket of the washing machine according to any of the claims 1 to 7.
  • the wash basket receives a wash load and is adapted to rotate and to be in translational motion during rotation due to an unbalance in wash load.
  • the washing machine comprises four linking members.
  • the before mentioned object is also solved by a method for providing an arrangement within a washing machine of Claim 10, which is used for determining an imbalance within a wash basket of a washing machine, wherein the washing machine comprises a cabinet enclosing a tub which includes a wash basket and two or more linking member adapted to link the tub to the cabinet.
  • the wash basket is adapted to rotate and be in translational motion during rotation due to an unbalance in wash load.
  • the method includes steps of:
  • the before mentioned object is also solved by a method of claim 11, wherein the method determines an imbalance within a wash basket of a washing machine.
  • the wash basket is adapted to receive a wash load for washing the wash load.
  • the washing machine comprises a cabinet enclosing a tub which includes the wash basket and two or more linking members linking the tub to the cabinet.
  • the linking member comprises a suspension system. The method includes following steps:
  • Fig. 1 shows a washing machine 1 having a cabinet 3 enclosing a tub 4 which includes a wash basket 2, two linking members 5 which are linking the tub 4 to a base 10 of the cabinet 3, and an arrangement to determine an imbalance within the wash basket 2.
  • the wash basket 2 receives a wash load, and rotates to wash the wash load and rinse water. Due to rotation of the wash load, a wash load force is generated.
  • the wash load force is proportional to the product of the mass of the wash load, the distance between the wash load and the center of rotation of the wash basket 2, and the square of the velocity of the wash basket 2.
  • the wash load When the wash load is having an unbalance, it leads to differential wash load force on different section of the wash basket 2, which further results in translational motion of the wash basket 2, and hence an imbalance within the wash basket. This imbalance of the wash basket is required to be measured, so that an appropriate action can be taken to counter such imbalance.
  • the washing machine is provided with an arrangement which includes a suspension system 6, a sensor and a microcontroller.
  • the suspension system 6 is placed within the linking members 5 and generates a damping force to dampen the translational motion of the wash basket 2, when the wash basket 2 is rotating.
  • the sensor measures the damping force in each of the suspension system 6, and generates a damping force data based on the measured damping force for each of the suspension system 6.
  • the microcontroller receives the damping force data of each of the suspension system 6, processes the damping force data, and determines an imbalance within the wash basket 2.
  • the linking members 5 can connect to other walls of the cabinet 3, and not to the base 2. In yet another embodiment, one of the linking members 5 can connect to the base 10, and other linking members can connect to other walls of the cabinet 3.
  • the washing machine 1 has four linking members 5, and accordingly has four suspensions systems, one within each linking members 5.
  • the sensor measures damping force from each of the suspension system 6, and generates the damping force data for each of the suspension system 6.
  • the microcontroller receives damping force data for each of the four suspension systems 6, and processes them to determine an imbalance within the wash basket 2.
  • the washing machine can have two or more linking members to implement the invention.
  • Fig. 2 illustrates an arrangement placed within the washing machine to determine an imbalance 15 within a wash basket of a washing machine.
  • the arrangement includes a suspension system 6 placed within the linking members, a sensor 7 placed in proximity to the suspension system 6, and a microcontroller 9.
  • the wash basket When there is an unbalance in the wash load, the wash basket is adapted to be in translational motion, when the wash basket is spinning.
  • the suspension system 6 generates a damping force which dampens translational motion of the wash basket. In case of imbalance within the wash basket, this damping force shall be different in each of the suspension systems 6.
  • the sensor 7 measures the damping force in each of the suspension system 6, and generates a damping force data 8 based on the measured damping force for each of the suspension system 6.
  • the microcontroller 9 receives the damping force data 8 of each of the suspension system 6, and processes the damping force data 8 to determine the imbalance 15 within the wash basket.
  • the microcontroller 9 processes the damping force data 8 received from each of the suspension system 6, and identifies a difference of damping force in each of the suspension system 6 with respect to other suspension system 6 of the washing machine. Based on such differences in the damping force, the microcontroller 9 determines the imbalance 15 within the wash basket.
  • Fig. 3 illustrates an exemplary suspension system 6 used in one of the embodiment of the invention, which is a semi-active type suspension system.
  • the suspension system 6 shown in the Fig 3 is Magnetorehological type suspension system filled with magnetorheological fluid 14, which is controlled by a magnetic field, usually using an electromagnet. This allows the damping characteristics of the suspension system 6 to be continuously controlled by varying the power of the electromagnet.
  • the suspension system 6 includes a piston 11, a foam 12 covering the piston, and a case 13.
  • the foam 12 covering the piston 11 is enclosed within the case 13, such that, the damping force is obtained as friction between the foam 12 and the case 13.
  • the foam 12 is saturated with magnetorheological fluid 14, and by applying a magnetic field to the foam 12, friction level between the foam 12 and the case 13 changes.
  • the arrangement can use other suspension types, which can be passive type or active type.
  • the semi-active suspension type used in the arrangement can be electrorheological type which has electrorhelogical fluid. Damping characteristics of such suspension system varies in influence of electrical field.
  • the arrangement comprises a suspension system 6 placed within the linking members 5 and adapted to generate a damping force to dampen translational motion of the wash basket 2, a sensor 7 adapted to measure the damping force in each of the suspension system 6, and adapted to generate a damping force data 8 based on the measured damping force for each of the suspension system 6, and a microcontroller 9 adapted to receive the damping force data 8 of each of the suspension system 6, and to process the damping force data 8 to determine the imbalance 15 within the wash basket 2.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP17162971.0A 2017-03-27 2017-03-27 Bestimmung einer unwucht innerhalb eines waschbehälters einer waschmaschine Withdrawn EP3382084A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17162971.0A EP3382084A1 (de) 2017-03-27 2017-03-27 Bestimmung einer unwucht innerhalb eines waschbehälters einer waschmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17162971.0A EP3382084A1 (de) 2017-03-27 2017-03-27 Bestimmung einer unwucht innerhalb eines waschbehälters einer waschmaschine

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EP3382084A1 true EP3382084A1 (de) 2018-10-03

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EP17162971.0A Withdrawn EP3382084A1 (de) 2017-03-27 2017-03-27 Bestimmung einer unwucht innerhalb eines waschbehälters einer waschmaschine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112522906A (zh) * 2020-11-27 2021-03-19 珠海格力电器股份有限公司 一种滚筒式衣物处理装置的偏心值检测方法及装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2204325A1 (de) * 1972-01-26 1973-08-02 Siemens Elektrogeraete Gmbh Zum schleudern dienende trommelwaschmaschine
GB2202646A (en) * 1987-03-18 1988-09-28 Ti Creda Mfg Control of washing machines
JPH0819687A (ja) * 1994-07-07 1996-01-23 Hitachi Ltd 全自動洗濯機の防振装置
DE19949217A1 (de) * 1999-10-13 2001-04-19 Suspa Holding Gmbh Waschmaschine
WO2006096430A2 (en) * 2005-03-08 2006-09-14 General Motors Global Technology Operations, Inc. Reversibly expandable energy absorbing assembly and methods for operating the same
JP2008000502A (ja) * 2006-06-26 2008-01-10 Matsushita Electric Ind Co Ltd 洗濯機
EP2568070A1 (de) * 2010-05-06 2013-03-13 Kabushiki Kaisha Toshiba Waschmaschine
WO2014098626A1 (en) * 2012-12-21 2014-06-26 Fisher & Paykel Appliances Limited Improved laundry machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2204325A1 (de) * 1972-01-26 1973-08-02 Siemens Elektrogeraete Gmbh Zum schleudern dienende trommelwaschmaschine
GB2202646A (en) * 1987-03-18 1988-09-28 Ti Creda Mfg Control of washing machines
JPH0819687A (ja) * 1994-07-07 1996-01-23 Hitachi Ltd 全自動洗濯機の防振装置
DE19949217A1 (de) * 1999-10-13 2001-04-19 Suspa Holding Gmbh Waschmaschine
WO2006096430A2 (en) * 2005-03-08 2006-09-14 General Motors Global Technology Operations, Inc. Reversibly expandable energy absorbing assembly and methods for operating the same
JP2008000502A (ja) * 2006-06-26 2008-01-10 Matsushita Electric Ind Co Ltd 洗濯機
EP2568070A1 (de) * 2010-05-06 2013-03-13 Kabushiki Kaisha Toshiba Waschmaschine
WO2014098626A1 (en) * 2012-12-21 2014-06-26 Fisher & Paykel Appliances Limited Improved laundry machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112522906A (zh) * 2020-11-27 2021-03-19 珠海格力电器股份有限公司 一种滚筒式衣物处理装置的偏心值检测方法及装置
CN112522906B (zh) * 2020-11-27 2021-12-03 珠海格力电器股份有限公司 一种滚筒式衣物处理装置的偏心值检测方法及装置

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