EP2899309A1 - Procédé de détection du niveau d'un liquide de nettoyage dans un lave-linge et lave-linge associé - Google Patents

Procédé de détection du niveau d'un liquide de nettoyage dans un lave-linge et lave-linge associé Download PDF

Info

Publication number
EP2899309A1
EP2899309A1 EP15151838.8A EP15151838A EP2899309A1 EP 2899309 A1 EP2899309 A1 EP 2899309A1 EP 15151838 A EP15151838 A EP 15151838A EP 2899309 A1 EP2899309 A1 EP 2899309A1
Authority
EP
European Patent Office
Prior art keywords
washing machine
wash liquid
tub
pressure switch
level
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Withdrawn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
EP15151838.8A
Other languages
German (de)
English (en)
Inventor
Costantino Mariotti
Giovanni Bombardieri
Mariano Funari
Nicola Colucci
Savio La Bella
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 EMEA SpA
Original Assignee
Indesit Co SpA
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 Indesit Co SpA filed Critical Indesit Co SpA
Priority to EP16151124.1A priority Critical patent/EP3031972A1/fr
Publication of EP2899309A1 publication Critical patent/EP2899309A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4244—Water-level measuring or regulating arrangements

Definitions

  • the present invention relates to a method for detecting the level of a wash liquid in a washing machine, in particular a household laundry washing machine or dishwasher, according to the preamble of claim 1.
  • the level of a wash liquid is usually detected by measuring the pressure of said washing liquid through a pressure switch.
  • a type of pressure switch known in the art is the so-called "state" pressure switch, which essentially operates like an on-off switch, since it allows the wash liquid to be supplied into the machine tub when the wash liquid pressure is lower than a limit value, and stops the wash liquid supply as soon as the wash liquid pressure reaches said limit value.
  • An analogue pressure switch essentially consists of a casing containing a coil within which a ferromagnetic core is moved by a rubber diaphragm that expands through the effect of the pressure exerted by the wash liquid.
  • the coil is a part of an oscillating electric circuit that outputs a signal having a frequency that varies as a function of the different positions taken by the core within the coil itself, i.e. according to the deformation of the diaphragm caused by the pressure of the wash liquid.
  • the resonance frequency of the oscillating electric circuit changes in a substantially linear manner as a function of the displacement of the ferromagnetic core relative to the coil.
  • a control circuit of the washing machine is calibrated during the washing machine production or testing stages and is programmed in a manner such that it associates a certain value of the frequency of the oscillating electric circuit with a certain value of the pressure of the wash liquid in the washing machine.
  • the washing machine control circuit can detect the corresponding level of the wash liquid. This allows the control circuit to send appropriate commands to the various components of the washing machine, in particular pertaining to the washing machine wash liquid supply, according to the wash liquid level detected in the washing machine.
  • analogue pressure switch allows for the detection of a plurality of different wash liquid levels in the tub of the washing machine, its use causes some problems which are related, in particular, to the fact that the analogue pressure switch is less accurate than the state pressure switch in detecting the wash liquid level.
  • a further drawback of the above-described analogue pressure switch is that the margin of error in measuring the fluid pressure increases over time and with the wear of the parts making up said analogue pressure switch.
  • Fig. 1 is a diagrammatic view of a washing machine according to the present invention, designated as a whole by reference numeral 10.
  • Said washing machine 10 comprises a tub 11 which houses a drum 12 adapted to contain a certain quantity of laundry (not shown in the drawing).
  • said drum 12 is rotatable about a substantially horizontal axis, being in particular driven by a motor 13 and transmission means 14.
  • drum 12 may also be produced in a way to alternatively rotate about a substantially vertical axis.
  • Said washing machine 10 also comprises an analogue pressure switch 15 associated with tub 11 in a manner such that it detects the pressure of the wash liquid in said tub 11 and, consequently, a level L of the wash liquid in said tub 11.
  • Said washing machine 10 further comprises:
  • said means for managing and controlling washing machine 10 comprise an electronic board 20 adapted to store and execute a plurality of wash programs, which typically comprise wash cycles that may vary depending on load, cloth type, dirtiness degree or required rinsing performance for the laundry to be washed.
  • the method for detecting a level L of a wash liquid in washing machine 10 is characterized in that said analogue pressure switch 15 is subjected to a calibration process, said calibration process being implemented during an operational step of washing machine 10.
  • an operational step is essentially a step of use of the washing machine by a user.
  • said calibration process comprises the following self-calibration steps:
  • said initial frequency F 0 of the analogue pressure switch 15 is detected when tub 11 of washing machine 10 contains substantially no wash liquid.
  • the frequency difference ⁇ F with respect to the initial frequency F 0 is a function of level L of the wash liquid in tub 11 of the washing machine
  • said level L can be calculated by detecting the variation of frequency ⁇ F with respect to an initial frequency F 0 of analogue pressure switch 15, said initial frequency F 0 being detected when tub 11 of washing machine 10 contains substantially no wash liquid.
  • the level L is calculated as a ratio between the variation of frequency ⁇ F and angular coefficient ⁇ .
  • Said self-calibration steps are preferably repeated on a periodical basis during the operational step of washing machine 10 according to the present invention.
  • said self-calibration steps may be repeated at every beginning and/or end of the wash cycles of each wash program.
  • at the beginning and at the end of a wash cycle tub 11 contains substantially no wash liquid, since any wash liquid residue remaining in the laundry is substantially insignificant for determining level L of a wash liquid according to the present invention, and anyway it cannot affect the application of the method according to the present invention.
  • Said self-calibration steps may also be repeated every time a wash program of washing machine 10 according to the present invention is started; alternatively, said self-calibration steps may be carried out after a predefined number of wash programs.
  • such advantages consist in the fact that the method according to the present invention allows to detect a plurality of different levels of the wash liquid in the washing machine while at the same time providing precise and accurate measurements of the different levels of the wash liquid in the washing machine.
  • Another advantage of the present invention is that the method for detecting the level of a wash liquid in a washing machine, in particular a household laundry washing machine or dishwasher, is not affected by the passing of time or by the wear of the parts that make up the pressure switch used for the measurement.
  • the method may comprise a steam treatment for the laundry contained in drum 12, said steam treatment being in particular carried out in a manner such that a first wash liquid level L1 is kept below drum 12, so that the laundry will not absorb the wash liquid but will only be moistened by steam.
  • a further variant provides for activating a recirculation circuit (not shown in the drawing) for recirculating the wash liquid in washing machine 10, said activation taking place, in particular, when analogue pressure switch 15 detects a predetermined level L of the wash liquid in said tub 11.
  • the recirculation circuit which in a laundry washing machine terminates at an aperture obtained in the upper portion of tub 11 and serves to improve the soaking of the textile items during the wash treatment, may operate intermittently: in such a case, the recirculation circuit may also be deactivated when analogue pressure switch 15 detects a predetermined lower level L2 of the wash liquid in said tub 11 (wherein L2 ⁇ L, L2 being preferably a level at which wash liquid heating means are completely immersed in the wash liquid).
  • L2 ⁇ L, L2 being preferably a level at which wash liquid heating means are completely immersed in the wash liquid.
  • washing machine 10 may be a dishwasher and that the present invention is also applicable to said dishwasher.
  • the recirculation circuit will be the hydraulic circuit adapted to supply wash liquid to an upper sprayer and/or a lower sprayer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Washing And Drying Of Tableware (AREA)
EP15151838.8A 2007-11-23 2008-11-05 Procédé de détection du niveau d'un liquide de nettoyage dans un lave-linge et lave-linge associé Withdrawn EP2899309A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16151124.1A EP3031972A1 (fr) 2007-11-23 2008-11-05 Procede de detection du niveau d'un liquide de nettoyage dans un lave-linge et lave-linge associe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000843A ITTO20070843A1 (it) 2007-11-23 2007-11-23 Metodo per rilevare il livello di un liquido di lavaggio all'interno di una macchina di lavaggio, e relativa macchina di lavaggio.
EP08168352.6A EP2065508B1 (fr) 2007-11-23 2008-11-05 Procédé de détection du niveau d'un liquide de nettoyage dans un lave-linge, et lave-linge associé

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP08168352.6A Division EP2065508B1 (fr) 2007-11-23 2008-11-05 Procédé de détection du niveau d'un liquide de nettoyage dans un lave-linge, et lave-linge associé

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP16151124.1A Division EP3031972A1 (fr) 2007-11-23 2008-11-05 Procede de detection du niveau d'un liquide de nettoyage dans un lave-linge et lave-linge associe

Publications (1)

Publication Number Publication Date
EP2899309A1 true EP2899309A1 (fr) 2015-07-29

Family

ID=40315030

Family Applications (3)

Application Number Title Priority Date Filing Date
EP08168352.6A Not-in-force EP2065508B1 (fr) 2007-11-23 2008-11-05 Procédé de détection du niveau d'un liquide de nettoyage dans un lave-linge, et lave-linge associé
EP15151838.8A Withdrawn EP2899309A1 (fr) 2007-11-23 2008-11-05 Procédé de détection du niveau d'un liquide de nettoyage dans un lave-linge et lave-linge associé
EP16151124.1A Withdrawn EP3031972A1 (fr) 2007-11-23 2008-11-05 Procede de detection du niveau d'un liquide de nettoyage dans un lave-linge et lave-linge associe

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08168352.6A Not-in-force EP2065508B1 (fr) 2007-11-23 2008-11-05 Procédé de détection du niveau d'un liquide de nettoyage dans un lave-linge, et lave-linge associé

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP16151124.1A Withdrawn EP3031972A1 (fr) 2007-11-23 2008-11-05 Procede de detection du niveau d'un liquide de nettoyage dans un lave-linge et lave-linge associe

Country Status (5)

Country Link
EP (3) EP2065508B1 (fr)
ES (1) ES2535036T3 (fr)
IT (1) ITTO20070843A1 (fr)
PL (1) PL2065508T3 (fr)
RU (1) RU2470101C2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11234577B2 (en) * 2020-01-22 2022-02-01 Haier Us Appliance Solutions, Inc. System and method for calibrating a wash fluid level detection system in a dishwasher appliance
CN116783345A (zh) * 2021-04-28 2023-09-19 三星电子株式会社 洗衣机及其控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2377614A1 (fr) 1977-01-14 1978-08-11 Crouzet Sa Detecteurs de niveaux d'eau pour machines a laver
FR2641609A1 (fr) * 1989-01-12 1990-07-13 Licentia Gmbh Procede pour determiner la quantite d'eau dans la cuve de lessive d'une machine a laver
EP1245714A2 (fr) * 2001-03-27 2002-10-02 Diehl AKO Stiftung & Co. KG Procédé de compensation d'erreurs de réponses d'un capteur de pression pour la mesure du niveau dans une machine à laver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1541322A1 (ru) * 1988-01-18 1990-02-07 Украинский Научно-Исследовательский И Конструкторско-Технологический Институт Бытового Обслуживания Населения Способ управлени стиральными машинами
US6341507B1 (en) * 1997-02-17 2002-01-29 Miele & Cie. Gmbh. & Co. Laundry treating equipment with a driving motor mounted on the drum shaft
DE60013791T3 (de) * 2000-06-30 2008-01-24 Whirlpool Corp., Benton Harbor Verfahren zur Detektion und zur Kontrolle einer dynamischen Unwucht in der Trommel einer Waschmaschine und Waschmaschine zur Durchführung dieses Verfahrens
ES2359439T3 (es) * 2007-04-30 2011-05-23 Electrolux Home Products Corporation N.V. Método de controlar una secadora de ropa por volteo.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2377614A1 (fr) 1977-01-14 1978-08-11 Crouzet Sa Detecteurs de niveaux d'eau pour machines a laver
FR2641609A1 (fr) * 1989-01-12 1990-07-13 Licentia Gmbh Procede pour determiner la quantite d'eau dans la cuve de lessive d'une machine a laver
EP1245714A2 (fr) * 2001-03-27 2002-10-02 Diehl AKO Stiftung & Co. KG Procédé de compensation d'erreurs de réponses d'un capteur de pression pour la mesure du niveau dans une machine à laver

Also Published As

Publication number Publication date
EP3031972A1 (fr) 2016-06-15
RU2008146189A (ru) 2010-05-27
EP2065508A1 (fr) 2009-06-03
PL2065508T3 (pl) 2015-08-31
ITTO20070843A1 (it) 2009-05-24
RU2470101C2 (ru) 2012-12-20
EP2065508B1 (fr) 2015-01-21
ES2535036T3 (es) 2015-05-04

Similar Documents

Publication Publication Date Title
US8245342B2 (en) Method for determining load size in a washing machine
EP1734169B1 (fr) Machine à laver domestique à recirculation d'eau avec détection automatique du type de la charge de linge et procédé correspondant
US8505139B2 (en) Adaptive automatic laundry washer water fill
US9534338B2 (en) Washing machine
US7930786B2 (en) Method for determining load size and/or setting water level in a washing machine
US8381341B2 (en) Method and apparatus for determining load size in a washing machine
EP2461729B1 (fr) Dispositif de lavage, tel qu'un lave-vaisselle ou une machine à laver, et procédé de fonctionnement d'un tel dispositif
EP1889961B1 (fr) Contrôle de l'alimentation en eau d'un générateur de vapeur d'un appareil de traitement de tissus utilisant un capteur de poids
CN106968080A (zh) 一种利用蒸汽进行衣物洗涤的方法
AU2012230236B2 (en) Method for washing laundry in a laundry washing machine and laundry washing machine
US7930787B2 (en) Method for determining load size and/or setting water level in a washing machine
EP2052666A2 (fr) Procédé de commande de lave-vaisselle
EP2065508B1 (fr) Procédé de détection du niveau d'un liquide de nettoyage dans un lave-linge, et lave-linge associé
KR101526956B1 (ko) 식기 세척기 및 그의 제어방법
EP2458058B1 (fr) Machine à laver
KR100978102B1 (ko) 세탁기의 세제량 판단방법
KR100323691B1 (ko) 드럼세탁기의포량감지방법
EP2733247B1 (fr) Machine à laver le linge et procédé de fonctionnement associé

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150120

AC Divisional application: reference to earlier application

Ref document number: 2065508

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FUNARI, MARIANO

Inventor name: LA BELLA, SAVIO

Inventor name: MARIOTTI, COSTANTINO

Inventor name: BOMBARDIERI, GIOVANNI

Inventor name: COLUCCI, NICOLA

17P Request for examination filed

Effective date: 20160113

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

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

Owner name: WHIRLPOOL EMEA S.P.A

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20171020

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20180301