EP0028067A1 - Washing machine having drain blockage indicator - Google Patents

Washing machine having drain blockage indicator Download PDF

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Publication number
EP0028067A1
EP0028067A1 EP80303186A EP80303186A EP0028067A1 EP 0028067 A1 EP0028067 A1 EP 0028067A1 EP 80303186 A EP80303186 A EP 80303186A EP 80303186 A EP80303186 A EP 80303186A EP 0028067 A1 EP0028067 A1 EP 0028067A1
Authority
EP
European Patent Office
Prior art keywords
washing machine
blocked
outlet
machine according
drain
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Withdrawn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
EP80303186A
Other languages
German (de)
English (en)
French (fr)
Inventor
Anthony Charles Totterdell
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.)
Electrical and Musical Industries Ltd
Original Assignee
Kenwood Manufacturing Co Ltd
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 Kenwood Manufacturing Co Ltd filed Critical Kenwood Manufacturing Co Ltd
Publication of EP0028067A1 publication Critical patent/EP0028067A1/en
Withdrawn legal-status Critical Current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
    • 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 
    • D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • D06F39/082—Safety arrangements for preventing water damage detecting faulty draining operations, e.g. filter blockage, faulty pump
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/087—Water level measuring or regulating 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/10—Filtering arrangements
    • 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
    • D06F2103/18—Washing liquid 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
    • D06F2105/58—Indications or alarms to the control system or to the user

Definitions

  • the present invention relates to washing machines.
  • the present invention we avoid the above problem of blockage of the chamber outlet by monitoring the water level during a draining operation and use this to determine whether the filter is in need of cleaning. If the water does not drain to a particular level in a given time, it can be taken that the filter is blocked. Of course, slow drainage may also be due to a faulty pump or a blockage elsewhere in the machine but checking the filter will at least eliminate that as the source of the difficulty.
  • the present invention is characterised by a device, operative during a draining step, to monitor the water level sensor to provide a signal indicating that the outlet is blocked.
  • This signal may be used, for example, to operate an indicator such as a lamp mounted on the fascia of the machine to alert the user to the need to check the filter.
  • the operation of the lamp or whatever other indicator is used, may be immediate or it may provide the "check filter" signal at the end of the complete operating cycle of the machine. This latter will be satisfactory where progressive blockages are expected.
  • a timer is activated at the same time as the drain pump during the period in which proper drainage or otherwise is to be detected and the level sensor is subsequently monitored. If the level sensor does not indicate that the level has dropped below the operating point of the sensor before the timer times out, this is taken as indicating improper drainage and the "check filter" indicator is activated, either immediately or at the end of the machine cycle.
  • an automatic washing machine 1 comprises a casing 2 defining a wash chamber in which is mounted a horizontal cylindrical wash tub 3 connected to an appropriate drive (not shown) for the various operations of the machine such as wash, spin, etc. Clothes or other articles to be washed are placed in the wash tub via an access door 4.
  • an electronic water valve 5 Associated with the washing chain within the casing 2 are an electronic water valve 5 and a drain pump 6 to fill and drain the chamber, respectively.
  • a filter 7 which prevents material which might jam the impellor of the drain pump 6 from reaching it. Water from the drain pump is pumped via a pipe 8 to an external drain 9.
  • the operation of the machine is controlled by a controller 10 which may comprise a microprocessor or a more conventional electromagnetic arrangement and this controller controls, inter alia, the drive motor of the wash tub, the water valve 5 and the drain pump 6.
  • the controller is suitably arranged so that the user can select the appropriate one of a number of programmes according to the articles to be washed.
  • the drain pump 6 is operated to drain the water from the wash chamber and then the water valve 5 opened to refill the wash chamber for a subsequent wash for rinse.
  • the drain pump is operated to drain the wash chamber and the water valve 5 subsequently held closed during the spin operation or operations.
  • a pressure switch arrangement 11 Water levels within the wash chamber are monitored by the controller by means of a pressure switch arrangement 11. Essentially, this comprises a closed housing in which is located a pressure-responsive diaphragm which controls closure of three sets of contacts 12, 13 and 14. One side of the diaphragm is communicated via a tube 16 with an air bell 17 which is open to the interior of the wash chamber. As the water level changes, the pressure in the wash chamber increases or decreases as appropriate, so the pressure difference acting on the diaphragm changes causes the contacts 12, 13 and 14 to open or close.
  • the contact 12 is arranged to open when the level of water in the wash chamber has increased to a given minimum level while contacts 13 and 1L 1 close, respectively, when the wash chamber is half full and full. There is some hysteresis between the switching level for increasing and decreasing water levels so that, for example, the contacts 13 and 14 2 open when the water level has decreased to 3 and 3 full respectively.
  • the switch 12 is used by the controller 10 to indicate when a desired minimum level of water is in the wash chamber and, in view of the hysteresis involved in its switching, is also taken to indicate during draining that the wash chamber is empty.
  • the switches 13 and 14 are used by the controller 10 to indicate that the wash chamber is half and completely full respectively during filling to control the operation of the water valve 5.
  • the machine operates in a conventional manner except as will be described below.
  • a "pump-out" signal is applied to controller 10 to energise the drain pump G. This signal also starts a timer 18 within the controller 10. During this period controller 10 monitors the switch 12 and if the latter does not close during the timing period of the timer 18, this indicates that the filter is blocked and a register 19 is set. At the end of the programme, the controller checks the content of the register 19 and, if set, illuminates a warning light 20 which indicates that the filter needs to be removed by the user and cleaned.
  • the controller may alternatively illuminate the lamp immediately or abort the remainder of the programme and continue pumping out past the low level switch operating point, for example continuing for a predetermined time.
  • the controller 10 could operate to start the timer 18 during each drain period.
  • the "pump-out" signal may be generated by the controller itself, in software in the case of a microprocessor or by an associated, separate programmer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Centrifugal Separators (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP80303186A 1979-09-12 1980-09-10 Washing machine having drain blockage indicator Withdrawn EP0028067A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7931600 1979-09-12
GB7931600 1979-09-12

Publications (1)

Publication Number Publication Date
EP0028067A1 true EP0028067A1 (en) 1981-05-06

Family

ID=10507772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80303186A Withdrawn EP0028067A1 (en) 1979-09-12 1980-09-10 Washing machine having drain blockage indicator

Country Status (7)

Country Link
EP (1) EP0028067A1 (es)
JP (1) JPS5695098A (es)
AU (1) AU6218080A (es)
DK (1) DK386580A (es)
ES (1) ES494959A0 (es)
FI (1) FI802852A (es)
NO (1) NO802707L (es)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0173823A2 (de) * 1984-08-22 1986-03-12 Bosch-Siemens HausgerÀ¤te GmbH Schaltungsanordnung zum geregelten Auffüllen und Nachfüllen von Behältern mit Flüssigkeiten
EP0245870A1 (en) * 1986-05-16 1987-11-19 INDUSTRIE ZANUSSI S.p.A. Filter monitoring device for an electric household appliance
EP0247995A1 (de) * 1986-05-27 1987-12-02 AUSTRIA Antriebstechnik G. Bauknecht Aktiengesellschaft Verfahren und Einrichtung zur Überwachung der Funktion einer Waschmaschine
EP0580563A1 (en) * 1992-07-22 1994-01-26 SMEG S.p.A. Safety device for dishwashers, in particular for sensing high water consumption
EP0807707A2 (en) * 1996-05-14 1997-11-19 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Clothes washing maschine with an innovative-type filter monitoring arrangement
WO1999029953A1 (en) * 1997-12-08 1999-06-17 Samsung Electronics Co., Ltd. Washing machine with a device for jetting water into a spin basket
EP1096052A2 (en) * 1999-10-28 2001-05-02 Electrolux Zanussi S.p.A. Method for controlling the lint filter in an automatic clothes washing machine
SG85072A1 (en) * 1992-08-03 2001-12-19 Sharp Kk Single-tub washing machine
EP1862582A2 (de) * 2006-05-30 2007-12-05 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Waschmaschine
US7984628B2 (en) * 2003-04-22 2011-07-26 Sharp Kabushiki Kaisha Washing machine capable of detecting leakage at water feed unit
EP2426246A1 (de) * 2010-09-01 2012-03-07 Miele & Cie. KG Verfahren zum Betreiben einer Waschmaschine mit Umfluteinrichtung und Waschmaschine
US20130079934A1 (en) * 2011-09-27 2013-03-28 Ip Holdings Llc Computer implemented method for controlling ebb flow watering systems
DE102012111505A1 (de) 2012-11-28 2014-05-28 Miele & Cie. Kg Verfahren zum Betreiben einer Wasch- oder Geschirrspülmaschine und Wasch- oder Geschirrspülmaschine zur Durchführung des Verfahrens
DE102008045086B4 (de) 2007-08-31 2019-03-07 Lg Electronics Inc. Geschirrspülmaschine
CN109629187A (zh) * 2018-12-11 2019-04-16 青岛海尔洗衣机有限公司 洗衣机排水控制方法
CN110195312A (zh) * 2018-02-24 2019-09-03 无锡小天鹅电器有限公司 洗衣机、洗涤控制方法、洗涤控制装置和存储介质
WO2020151556A1 (zh) * 2019-01-25 2020-07-30 青岛海尔洗衣机有限公司 一种洗衣机排水控制方法及洗衣机
GB2582296A (en) * 2019-03-13 2020-09-23 Centrica Plc System for detecting drainage flow obstructions in washing appliances
CN113180570A (zh) * 2021-03-28 2021-07-30 杭州舟关信息科技有限公司 一种洗碗机排水孔自动清洁装置
CN114146987A (zh) * 2021-11-30 2022-03-08 广州发展电力科技有限公司 一种风力发电机转子接地处理方法、系统及计算机设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6811374U (de) * 1968-12-12 1969-08-11 Siemens Elektrogeraete Gmbh Wasch- oder geschirrspuelmaschine mit einer vorrichtung zum abpumpen der wasch- oder spuelfluessigkeit
US3545481A (en) * 1967-11-03 1970-12-08 Angelo R Fratalia Liquid level control device
DE2631344A1 (de) * 1976-07-13 1978-01-19 Philips Patentverwaltung Vorrichtung zur anzeige der verschmutzung der pumpe einer waschmaschine oder waescheschleuder
DE2818286A1 (de) * 1977-08-18 1979-10-31 Bauknecht Gmbh G Verfahren und anordnung zur funktionsablaufsueberwachung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545481A (en) * 1967-11-03 1970-12-08 Angelo R Fratalia Liquid level control device
DE6811374U (de) * 1968-12-12 1969-08-11 Siemens Elektrogeraete Gmbh Wasch- oder geschirrspuelmaschine mit einer vorrichtung zum abpumpen der wasch- oder spuelfluessigkeit
DE2631344A1 (de) * 1976-07-13 1978-01-19 Philips Patentverwaltung Vorrichtung zur anzeige der verschmutzung der pumpe einer waschmaschine oder waescheschleuder
DE2818286A1 (de) * 1977-08-18 1979-10-31 Bauknecht Gmbh G Verfahren und anordnung zur funktionsablaufsueberwachung

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0173823A2 (de) * 1984-08-22 1986-03-12 Bosch-Siemens HausgerÀ¤te GmbH Schaltungsanordnung zum geregelten Auffüllen und Nachfüllen von Behältern mit Flüssigkeiten
EP0173823A3 (en) * 1984-08-22 1986-09-17 Bosch-Siemens Hausgerate Gmbh Circuit arrangement for controlled filling up and refilling of containers with liquids
US4729495A (en) * 1984-08-22 1988-03-08 The Coco-Cola Company Circuit configuration for the controlled filling and refilling of containers with liquids
EP0245870A1 (en) * 1986-05-16 1987-11-19 INDUSTRIE ZANUSSI S.p.A. Filter monitoring device for an electric household appliance
EP0247995A1 (de) * 1986-05-27 1987-12-02 AUSTRIA Antriebstechnik G. Bauknecht Aktiengesellschaft Verfahren und Einrichtung zur Überwachung der Funktion einer Waschmaschine
EP0580563A1 (en) * 1992-07-22 1994-01-26 SMEG S.p.A. Safety device for dishwashers, in particular for sensing high water consumption
SG85072A1 (en) * 1992-08-03 2001-12-19 Sharp Kk Single-tub washing machine
EP0807707A2 (en) * 1996-05-14 1997-11-19 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Clothes washing maschine with an innovative-type filter monitoring arrangement
EP0807707A3 (en) * 1996-05-14 1998-09-16 Electrolux Zanussi S.p.A. Clothes washing maschine with an innovative-type filter monitoring arrangement
WO1999029953A1 (en) * 1997-12-08 1999-06-17 Samsung Electronics Co., Ltd. Washing machine with a device for jetting water into a spin basket
EP1096052A2 (en) * 1999-10-28 2001-05-02 Electrolux Zanussi S.p.A. Method for controlling the lint filter in an automatic clothes washing machine
EP1096052A3 (en) * 1999-10-28 2001-07-04 Electrolux Zanussi S.p.A. Method for controlling the lint filter in an automatic clothes washing machine
US7984628B2 (en) * 2003-04-22 2011-07-26 Sharp Kabushiki Kaisha Washing machine capable of detecting leakage at water feed unit
EP1862582A2 (de) * 2006-05-30 2007-12-05 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Waschmaschine
EP1862582A3 (de) * 2006-05-30 2008-06-11 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Waschmaschine
DE102008045086B4 (de) 2007-08-31 2019-03-07 Lg Electronics Inc. Geschirrspülmaschine
EP2426246A1 (de) * 2010-09-01 2012-03-07 Miele & Cie. KG Verfahren zum Betreiben einer Waschmaschine mit Umfluteinrichtung und Waschmaschine
US20130079934A1 (en) * 2011-09-27 2013-03-28 Ip Holdings Llc Computer implemented method for controlling ebb flow watering systems
US8725301B2 (en) * 2011-09-27 2014-05-13 Ip Holdings, Llc Computer implemented method for controlling ebb flow watering systems
US9901044B2 (en) 2011-09-27 2018-02-27 Ip Holdings, Llc Ebb and flow watering system
DE102012111505A1 (de) 2012-11-28 2014-05-28 Miele & Cie. Kg Verfahren zum Betreiben einer Wasch- oder Geschirrspülmaschine und Wasch- oder Geschirrspülmaschine zur Durchführung des Verfahrens
CN110195312A (zh) * 2018-02-24 2019-09-03 无锡小天鹅电器有限公司 洗衣机、洗涤控制方法、洗涤控制装置和存储介质
CN109629187A (zh) * 2018-12-11 2019-04-16 青岛海尔洗衣机有限公司 洗衣机排水控制方法
WO2020151556A1 (zh) * 2019-01-25 2020-07-30 青岛海尔洗衣机有限公司 一种洗衣机排水控制方法及洗衣机
GB2582296A (en) * 2019-03-13 2020-09-23 Centrica Plc System for detecting drainage flow obstructions in washing appliances
GB2582296B (en) * 2019-03-13 2021-10-13 Centrica Plc System for detecting drainage flow obstructions in washing appliances
US11634853B2 (en) 2019-03-13 2023-04-25 Centrica Plc System for detecting drainage flow obstructions in washing appliances
CN113180570A (zh) * 2021-03-28 2021-07-30 杭州舟关信息科技有限公司 一种洗碗机排水孔自动清洁装置
CN114146987A (zh) * 2021-11-30 2022-03-08 广州发展电力科技有限公司 一种风力发电机转子接地处理方法、系统及计算机设备
CN114146987B (zh) * 2021-11-30 2022-11-29 广州发展电力科技有限公司 一种风力发电机转子接地处理方法、系统及计算机设备

Also Published As

Publication number Publication date
ES8105807A1 (es) 1981-06-01
JPS5695098A (en) 1981-08-01
FI802852A (fi) 1981-03-13
AU6218080A (en) 1981-03-26
NO802707L (no) 1981-03-13
ES494959A0 (es) 1981-06-01
DK386580A (da) 1981-03-13

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR IT LU NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KENWOOD MANUFACTURING COMPANY LIMITED

STAA Information on the status of an ep patent application or granted ep patent

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Effective date: 19811110

18W Application withdrawn

Withdrawal date: 19820424

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Effective date: 19811110

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TOTTERDELL, ANTHONY CHARLES