EP2765230A1 - Verfahren zum Betrieb einer Waschmaschine und Waschmaschine mit solch einem Verfahren - Google Patents

Verfahren zum Betrieb einer Waschmaschine und Waschmaschine mit solch einem Verfahren Download PDF

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Publication number
EP2765230A1
EP2765230A1 EP13154334.0A EP13154334A EP2765230A1 EP 2765230 A1 EP2765230 A1 EP 2765230A1 EP 13154334 A EP13154334 A EP 13154334A EP 2765230 A1 EP2765230 A1 EP 2765230A1
Authority
EP
European Patent Office
Prior art keywords
drum
laundry
parameter
motor
speed
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.)
Granted
Application number
EP13154334.0A
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English (en)
French (fr)
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EP2765230B1 (de
Inventor
Gaetano Paviglianiti
Massimo Paglia
Mattia Vago
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
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 Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP13154334.0A priority Critical patent/EP2765230B1/de
Priority to PL13154334T priority patent/PL2765230T3/pl
Priority to US14/173,240 priority patent/US20140215725A1/en
Publication of EP2765230A1 publication Critical patent/EP2765230A1/de
Application granted granted Critical
Publication of EP2765230B1 publication Critical patent/EP2765230B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/007—Methods for washing, rinsing or spin-drying for spin-drying only
    • 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

Definitions

  • the present invention relates to a method of operating a laundry treating appliance having a rotatable drum defining a treating chamber for receiving laundry for treatment, and a motor rotating the drum. More specifically, the present invention relates to the above method comprising increasing the rotational speed of the drum by increasing the rotational speed of the motor and measuring at least one parameter related to the rotation of the drum/motor in order to determine the degree of the laying of the laundry articles against the inner wall of the drum.
  • the method according to the invention will be mainly used for washing machines, it can be used also for tumble dryers and washer-dryers as well.
  • a known method is disclosed by EP 2379786 where the measured parameter (a measurement variable or a control variable) has a harmonic oscillation produced by an unbalance.
  • Such known method requires a quite complex comparison between a theoretical sinusoidal oscillation of the parameter and the actual oscillation, so as to determine the degree of the laying of the laundry articles against the inner wall of the drum on the basis of the correlation.
  • This known method requires a quite complex algorithm capable of carrying out such correlation.
  • the degree of the laying of the laundry articles against the inner wall of the drum i.e.
  • the percentage of load retained in a substantially fixed position relative to the drum by centrifugal force may be considered a too rich information for the actual purpose of washer control, since what matters is only the speed at which all clothes into the drum of the washing machine are stuck to the side wall of the drum by means of the centrifugal force effect.
  • the unbalance determination can be safely and quickly carried out without the need of reaching a fixed predetermined value as in the old washing machines (i.e. saving cycle time and energy).
  • carrying out unbalance detection at a speed identical or very close to the actual speed at which laundry is retained in a fixed position relative to the drum by centrifugal force has advantages also in view of the accuracy and robustness of unbalance detection.
  • one object of the present invention is to provide a method as mentioned at the beginning of the description which allows a simple, reliable and inexpensive method to detect the speed at which laundry is entirely retained in a substantially fixed position relative to the drum by centrifugal force, so that no portion of load is allowed to tumble.
  • any signal related to the energy of the motor system, particularly torque or power thereof, is monitored during acceleration phase and the speed at which laundry articles are against the side wall of the drum due to centrifugal force is detected when said signal reaches an absolute minimum.
  • the main advantage of the solution according to the present invention is that the complexity is dramatically reduced. Moreover, since the concept is based on the physical behavior of the laundry inside the drum (mechanical energy balance), the algorithm according to the invention is calibration free with respect to machine type/model variation. In few words, no additional effort is required to calibrate algorithm parameters.
  • the technical solution according to the invention starts from the consideration that during an acceleration speed profile it is possible to identify three phases (I, II, III in figures 1 and 2 ).
  • the laundry inside the drum is tumbling.
  • the amount of laundry stuck on the side of the drum increases as the speed increases, while the tumbling load amount decreases. This condition holds until the drum reaches a certain speed in which all clothes are stuck to the side of the drum (phase III).
  • This speed is known in washing machines jargon as "satelization speed”.
  • T frict is a constant friction torque
  • T mot b frict ⁇ ⁇ sat + J sat ⁇ ⁇ ⁇ + T frict
  • Figure 6 shows the absolute minimum reached by the low frequency component of the torque when the "satelization speed" is reached. The applicant observed that after "satelization speed” the motor torque signal increases linearly due to the viscous term of the above mechanical equation.
  • the algorithm according to the invention is the consequence of the above findings to detect the "satelization speed" in a simple and reliable way.
  • the torque low frequency component (or the average torque) is processed and, when the absolute minimum is found, the corresponding reached speed is the "satelization speed".
  • the signal processed by the algorithm to detect the "satelization speed" is the mechanical/electrical power as signal related to the energy of the motor.
  • the main signal processed by the algorithm according to the invention is preferably the low frequency component of the real signal. Accordingly, the algorithm finds the absolute minimum processing the real signal filtered with a low pass filter or with a "sliding moving average” or with any other method which eliminates the high frequency components. Since these methods are well known in the art, it is not necessary to describe them in details in the present specification.
  • the main algorithm steps are as follows: the algorithm monitors the input main signal (torque/power etc..), it waits until the absolute minimum occurs and, when the absolute minimum occurs, it gets the actual speed value and set it as "satelization speed".
  • a solution to detect the absolute minimum is to process the torque (or power) signal with a suitable digital filter (eg., "robust noise differentiator” technique well known in the literature) and compare values to get minima and maxima.
  • fig. 7 shows that the low frequency component of the power (or torque) signal could present local minima due to the laundry tumbling and inertia geometry variation during distribution.
  • the algorithm according to the invention waits preferably a predefined time (machine model dependent) and monitors if a new maximum is found (i.e., due to the physical behavior of the laundry inside the drum, if a maximum happens a new minimum will come).
  • Figure 9 shows such variant of the absolute minimum search algorithm in the details. Experiments carried out by the applicant on a washer machine have shown that the method according to the invention is very reliable and that the effect of variation of the viscous friction coefficient is negligible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP13154334.0A 2013-02-07 2013-02-07 Verfahren zum Betrieb einer Waschmaschine und Waschmaschine mit solch einem Verfahren Not-in-force EP2765230B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP13154334.0A EP2765230B1 (de) 2013-02-07 2013-02-07 Verfahren zum Betrieb einer Waschmaschine und Waschmaschine mit solch einem Verfahren
PL13154334T PL2765230T3 (pl) 2013-02-07 2013-02-07 Sposób działania pralki i pralka wykorzystująca taki sposób
US14/173,240 US20140215725A1 (en) 2013-02-07 2014-02-05 Methods of operating washing machines and washing machines using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13154334.0A EP2765230B1 (de) 2013-02-07 2013-02-07 Verfahren zum Betrieb einer Waschmaschine und Waschmaschine mit solch einem Verfahren

Publications (2)

Publication Number Publication Date
EP2765230A1 true EP2765230A1 (de) 2014-08-13
EP2765230B1 EP2765230B1 (de) 2016-07-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13154334.0A Not-in-force EP2765230B1 (de) 2013-02-07 2013-02-07 Verfahren zum Betrieb einer Waschmaschine und Waschmaschine mit solch einem Verfahren

Country Status (3)

Country Link
US (1) US20140215725A1 (de)
EP (1) EP2765230B1 (de)
PL (1) PL2765230T3 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9863080B2 (en) 2015-11-19 2018-01-09 Whirlpool Corporation Laundry treating appliance and methods of operation
US9873968B2 (en) 2015-11-19 2018-01-23 Whirlpool Corporation Laundry treating appliance and methods of operation
US9885135B2 (en) 2015-11-19 2018-02-06 Whirlpool Corporation Laundry treating appliance and methods of operation
US9890490B2 (en) 2015-11-19 2018-02-13 Whirlpool Corporation Laundry treating appliance and methods of operation
US9988751B2 (en) 2015-07-29 2018-06-05 Whirlpool Corporation Laundry treating appliance and methods of reducing tub contact therein
US9988753B2 (en) 2015-11-19 2018-06-05 Whirlpool Corporation Laundry treating appliance and methods of operation
US10041202B2 (en) 2015-11-19 2018-08-07 Whirlpool Corporation Laundry treating appliance and methods of operation
CN110872761A (zh) * 2018-08-31 2020-03-10 无锡飞翎电子有限公司 滚筒洗衣机的偏心检测方法
US10669663B2 (en) 2015-10-01 2020-06-02 Whirlpool Corporation Laundry treating appliance and methods of operation
US10982372B2 (en) 2018-10-02 2021-04-20 Haier Us Appliance Solutions, Inc. Washing machine appliances and methods for setting plaster speed
US11053621B2 (en) 2018-10-02 2021-07-06 Haier Us Appliance Solutions, Inc. Washing machine appliances and methods of operation for determining load size
US12043939B2 (en) 2020-10-13 2024-07-23 Haier Us Appliance Solutions, Inc. Washing machine appliances and methods of operation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6648255B2 (ja) * 2015-07-31 2020-02-14 ▲広▼▲東▼威▲靈▼▲電▼机制造有限公司 ドラム式洗濯機、そのアンバランス検出方法及び装置
KR101755831B1 (ko) * 2015-08-28 2017-07-10 현대자동차주식회사 모터 제어 방법
KR102527576B1 (ko) * 2016-10-07 2023-04-28 엘지전자 주식회사 세탁기 및 그 제어방법

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WO2004025012A1 (de) * 2002-09-09 2004-03-25 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum betreiben einer programmierbaren waschmaschine
EP1693498A2 (de) * 2005-02-18 2006-08-23 Whirlpool Corporation Verfahren zum Kontrollieren eines Schleudervorgangs in einer Waschmaschine
US20100205826A1 (en) * 2009-02-19 2010-08-19 Whirlpool Corporation Laundry treating appliance with imaging control
EP2379786A1 (de) 2008-12-22 2011-10-26 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum steuern eines wäscheverteilbetriebs eines haushaltgeräts zur pflege von wäschestücken
EP2524989A1 (de) * 2011-05-17 2012-11-21 Whirlpool Corporation Verfahren und Vorrichtung zur Bestimmung des Ladungsabfalls in einer Wäschebehandlungsanwendung

Family Cites Families (5)

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US7591038B2 (en) * 2003-04-28 2009-09-22 Emerson Electric Co., Method and system for operating a clothes washing machine
US9222212B2 (en) * 2008-03-11 2015-12-29 Aktiebolaget Electrolux Method for processing laundry, and a laundry processing device
US8166590B2 (en) * 2009-04-16 2012-05-01 Whirlpool Corporation Method and apparatus for determining laundry load size
US9115456B2 (en) * 2011-12-20 2015-08-25 Whirlpool Corporation Method for detecting satellization speed of clothes load in a horizontal axis laundry treating appliance
US8689641B2 (en) * 2012-07-17 2014-04-08 Whirlpool Corporation Detecting satellization of a laundry load

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004025012A1 (de) * 2002-09-09 2004-03-25 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum betreiben einer programmierbaren waschmaschine
EP1693498A2 (de) * 2005-02-18 2006-08-23 Whirlpool Corporation Verfahren zum Kontrollieren eines Schleudervorgangs in einer Waschmaschine
EP2379786A1 (de) 2008-12-22 2011-10-26 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum steuern eines wäscheverteilbetriebs eines haushaltgeräts zur pflege von wäschestücken
US20100205826A1 (en) * 2009-02-19 2010-08-19 Whirlpool Corporation Laundry treating appliance with imaging control
EP2524989A1 (de) * 2011-05-17 2012-11-21 Whirlpool Corporation Verfahren und Vorrichtung zur Bestimmung des Ladungsabfalls in einer Wäschebehandlungsanwendung

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9988751B2 (en) 2015-07-29 2018-06-05 Whirlpool Corporation Laundry treating appliance and methods of reducing tub contact therein
US11739466B2 (en) 2015-10-01 2023-08-29 Whirlpool Corporation Laundry treating appliance and methods of operation
US11486074B2 (en) 2015-10-01 2022-11-01 Whirlpool Corporation Laundry treating appliance and methods of operation
US10669663B2 (en) 2015-10-01 2020-06-02 Whirlpool Corporation Laundry treating appliance and methods of operation
US10301762B2 (en) 2015-11-19 2019-05-28 Whirlpool Corporation Laundry treating appliance and methods of operation
US9988753B2 (en) 2015-11-19 2018-06-05 Whirlpool Corporation Laundry treating appliance and methods of operation
US10041202B2 (en) 2015-11-19 2018-08-07 Whirlpool Corporation Laundry treating appliance and methods of operation
US10087565B2 (en) 2015-11-19 2018-10-02 Whirlpool Corporation Laundry treating appliance and methods of operation
US9863080B2 (en) 2015-11-19 2018-01-09 Whirlpool Corporation Laundry treating appliance and methods of operation
US9890490B2 (en) 2015-11-19 2018-02-13 Whirlpool Corporation Laundry treating appliance and methods of operation
US9885135B2 (en) 2015-11-19 2018-02-06 Whirlpool Corporation Laundry treating appliance and methods of operation
US9873968B2 (en) 2015-11-19 2018-01-23 Whirlpool Corporation Laundry treating appliance and methods of operation
CN110872761A (zh) * 2018-08-31 2020-03-10 无锡飞翎电子有限公司 滚筒洗衣机的偏心检测方法
CN110872761B (zh) * 2018-08-31 2022-02-25 无锡飞翎电子有限公司 滚筒洗衣机的偏心检测方法
US10982372B2 (en) 2018-10-02 2021-04-20 Haier Us Appliance Solutions, Inc. Washing machine appliances and methods for setting plaster speed
US11053621B2 (en) 2018-10-02 2021-07-06 Haier Us Appliance Solutions, Inc. Washing machine appliances and methods of operation for determining load size
US12043939B2 (en) 2020-10-13 2024-07-23 Haier Us Appliance Solutions, Inc. Washing machine appliances and methods of operation

Also Published As

Publication number Publication date
PL2765230T3 (pl) 2017-08-31
EP2765230B1 (de) 2016-07-20
US20140215725A1 (en) 2014-08-07

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