EP3073006A1 - Procédé pour la détection de défaillance d'une pompe de recirculation dans un lave-linge et lave-linge utilisant un tel procédé - Google Patents

Procédé pour la détection de défaillance d'une pompe de recirculation dans un lave-linge et lave-linge utilisant un tel procédé Download PDF

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Publication number
EP3073006A1
EP3073006A1 EP15161543.2A EP15161543A EP3073006A1 EP 3073006 A1 EP3073006 A1 EP 3073006A1 EP 15161543 A EP15161543 A EP 15161543A EP 3073006 A1 EP3073006 A1 EP 3073006A1
Authority
EP
European Patent Office
Prior art keywords
water level
recirculation pump
washing machine
tub
predetermined
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Withdrawn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
EP15161543.2A
Other languages
German (de)
English (en)
Inventor
Eva Lang
Guglielmo Roelfsema
Rainer Schuster
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 EP15161543.2A priority Critical patent/EP3073006A1/fr
Publication of EP3073006A1 publication Critical patent/EP3073006A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2105/06—Recirculation of washing liquids, e.g. by pumps or diverting valves
    • 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
    • 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

Definitions

  • the present invention relates to a method for detecting malfunction of a recirculation pump in a washing machine having a tub and a rotating drum.
  • Clothes washing machines which recirculates wash or rinse water from a surrounding tub into a clothes holding basket are well known in the art.
  • the main advantage of such washing machine is to reduce the quantity of water required for wash and rinse cycles.
  • the fill level is controlled by a pressure sensor in order to control water fill levels at the beginning of each wash and rinse cycle.
  • a washing machine of this type is disclosed by US 4168615 .
  • US 2013/0081431 discloses a similar washing machine in which relatively short bursts of operation of a recirculation pump are coordinated with corresponding intervals of drum rotation during the initial fill periods. The aim is to thoroughly wet the clothes early in each wash/rinse phase to thus improve the wash/rinse effectiveness.
  • control unit of the washing machine is provided with an algorithm which is configured to detect different failure cases of the recirculation pump. If for instance the pump runs in cavitation/priming issues, or if the recirculation pump is blocked, then the algorithm according to the invention is able to sense such malfunction and to adopt the proper remedies, for instance to switch off the pump and to repeat the assessment a second time or more.
  • An analog pressure sensor is preferably used to monitor re-circulation pump as well as needed water quantity for laundry during wash process.
  • Another advantage of the present invention is that pump monitoring can be done promptly, without waiting for the pump running in time out issue, by detecting rising water columns also during wash process indicating system malfunction.
  • the algorithm according to the invention may be used as well to detect/eliminate priming issue during main wash, and not only during the initial filling, soaking and tumbling phase. According to the invention, when the circulation pump is started or restarted, after a predetermined time the water level in the tub should decrease of a predetermined value depending mainly of the geometry of the tub/drum and of the features of the pump (usually few millimeters of water column), otherwise priming issue is present.
  • the assessment of recirculation pump malfunction is assessed by switching off such pump and measuring a first water level in the tub, waiting for a predetermined rest period, measuring a second water level in the tub after such predetermined rest period is elapsed, comparing said first and second water levels and issuing a malfunction signal when said difference is below a predetermined value.
  • a washing machine 10 comprises a tub 12 and a rotating drum 14 for containing the laundry.
  • a conduit system 20 allows a recirculation of water and washing liquor through the recirculation pump 16.
  • a pressure sensor 18 monitors the water level in the tub and sends signals to a control unit 19.
  • the washing machine 10 comprises also a water spray nozzle 22, a water filling conduit 24 and a discharge pump 26 (which can be also integrated with the recirculation pump).
  • figure 2 it is shown how the water level changes during the filling, soaking and tumbling phase for two different loads, curve A being for a load of 1 kg, while curve B being for a load of 3 kg.
  • a first water level WL1 is detected. Then, at time indicated with reference Q in figure 2 , circulation pump 16 and motor (not shown) driving the drum 14 are both switched on again and run for a predetermined period of time Z, comprised between 5 and 200 seconds, preferably between 10 and 60 seconds. At the end of such period (time indicated with reference R in figure 2 ), a second water level WL2 is measured by the sensor 18. If the difference between first water level WL1 and second water level WL2 is higher than a predetermined threshold value, this means that the recirculation pump does work properly and that the washing cycle can be initiated.
  • the algorithm carries out pump triggering, and then it repeats the pump assessment cycle starting from point M, for one or more times
  • water levels WL1 and WL2 are only indicative; as a matter of fact the upper level WL1 does not contact the drum 14 during the normal washing cycle, a part from the filling step where, for a small load of clothes (curve A in figure 2 ), the water level can reach the level of the drum, which is indicated with reference D in figure 2 .
  • the algorithm according to the invention can be carried out properly only when water level WL1 or WL2 are underneath the drum 14. In case the water level is above le drum (i.e. inside the drum) there is no actual need for recirculation since a wash liquor exchange is already guaranteed.
  • Figure 5 describes an auxiliary algorithm which exploits the analog pressure sensor 18 and it is used during the water refilling step.
  • the control unit 19 waits for a predetermined period time Z' and then water pressure (i.e. water level) is detected. If such pressure is above a predetermined value X', this means that a sufficient amount of water has been loaded in the tub 12. If not, a predetermined amount of water is fed into the tub and the algorithm is repeated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP15161543.2A 2015-03-27 2015-03-27 Procédé pour la détection de défaillance d'une pompe de recirculation dans un lave-linge et lave-linge utilisant un tel procédé Withdrawn EP3073006A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15161543.2A EP3073006A1 (fr) 2015-03-27 2015-03-27 Procédé pour la détection de défaillance d'une pompe de recirculation dans un lave-linge et lave-linge utilisant un tel procédé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15161543.2A EP3073006A1 (fr) 2015-03-27 2015-03-27 Procédé pour la détection de défaillance d'une pompe de recirculation dans un lave-linge et lave-linge utilisant un tel procédé

Publications (1)

Publication Number Publication Date
EP3073006A1 true EP3073006A1 (fr) 2016-09-28

Family

ID=52875497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15161543.2A Withdrawn EP3073006A1 (fr) 2015-03-27 2015-03-27 Procédé pour la détection de défaillance d'une pompe de recirculation dans un lave-linge et lave-linge utilisant un tel procédé

Country Status (1)

Country Link
EP (1) EP3073006A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107447434A (zh) * 2017-08-18 2017-12-08 青岛海尔洗衣机有限公司 洗衣机进水监测装置、监测方法及洗衣机
US20190010648A1 (en) * 2017-07-06 2019-01-10 Lg Electronics Inc. Method for controlling laundry treating apparatus
CN113498975A (zh) * 2021-08-16 2021-10-15 合肥美菱物联科技有限公司 一种用于茶吧机的故障自检***及其方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168615A (en) 1978-05-17 1979-09-25 General Electric Company Clothes washing machine with water recirculation
EP0202509A2 (fr) * 1985-05-24 1986-11-26 INDUSTRIE ZANUSSI S.p.A. Dispositif de commande pour machine à laver le linge
US5714939A (en) * 1995-09-29 1998-02-03 Daewoo Electronics Co., Ltd. Method of detecting the clogging of a filter installed in a washing machine
EP2113600A1 (fr) * 2008-04-28 2009-11-04 Panasonic Corporation Machine à laver de type tambour
US20130081431A1 (en) 2011-09-30 2013-04-04 Electrolux Home Products, Inc. Water Recirculation and Drum Rotation Control in a Laundry Washer
EP2698462A2 (fr) * 2011-04-14 2014-02-19 LG Electronics Inc. Lave-linge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168615A (en) 1978-05-17 1979-09-25 General Electric Company Clothes washing machine with water recirculation
EP0202509A2 (fr) * 1985-05-24 1986-11-26 INDUSTRIE ZANUSSI S.p.A. Dispositif de commande pour machine à laver le linge
US5714939A (en) * 1995-09-29 1998-02-03 Daewoo Electronics Co., Ltd. Method of detecting the clogging of a filter installed in a washing machine
EP2113600A1 (fr) * 2008-04-28 2009-11-04 Panasonic Corporation Machine à laver de type tambour
EP2698462A2 (fr) * 2011-04-14 2014-02-19 LG Electronics Inc. Lave-linge
US20130081431A1 (en) 2011-09-30 2013-04-04 Electrolux Home Products, Inc. Water Recirculation and Drum Rotation Control in a Laundry Washer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190010648A1 (en) * 2017-07-06 2019-01-10 Lg Electronics Inc. Method for controlling laundry treating apparatus
KR20190005414A (ko) * 2017-07-06 2019-01-16 엘지전자 주식회사 세탁물 처리 장치의 제어 방법
CN107447434A (zh) * 2017-08-18 2017-12-08 青岛海尔洗衣机有限公司 洗衣机进水监测装置、监测方法及洗衣机
CN107447434B (zh) * 2017-08-18 2022-02-18 重庆海尔洗衣机有限公司 洗衣机进水监测装置及洗衣机
CN113498975A (zh) * 2021-08-16 2021-10-15 合肥美菱物联科技有限公司 一种用于茶吧机的故障自检***及其方法

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