EP1953291B1 - Wäschebehandlungsmaschine mit Gewichtssensoren - Google Patents

Wäschebehandlungsmaschine mit Gewichtssensoren Download PDF

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Publication number
EP1953291B1
EP1953291B1 EP07101440A EP07101440A EP1953291B1 EP 1953291 B1 EP1953291 B1 EP 1953291B1 EP 07101440 A EP07101440 A EP 07101440A EP 07101440 A EP07101440 A EP 07101440A EP 1953291 B1 EP1953291 B1 EP 1953291B1
Authority
EP
European Patent Office
Prior art keywords
laundry treating
treating machine
cabinet
sensing means
machine according
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.)
Not-in-force
Application number
EP07101440A
Other languages
English (en)
French (fr)
Other versions
EP1953291A1 (de
Inventor
Andrei Uhov
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to AT07101440T priority Critical patent/ATE466127T1/de
Priority to EP07101440A priority patent/EP1953291B1/de
Priority to ES07101440T priority patent/ES2343904T3/es
Priority to PL07101440T priority patent/PL1953291T3/pl
Priority to DE602007006148T priority patent/DE602007006148D1/de
Priority to RU2008103369/12A priority patent/RU2433215C2/ru
Publication of EP1953291A1 publication Critical patent/EP1953291A1/de
Application granted granted Critical
Publication of EP1953291B1 publication Critical patent/EP1953291B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or weight
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight

Definitions

  • the present invention relates to a laundry treating machine such as a washing machine, a dryer or a washer-dryer, provided with weight sensing means.
  • weight of wet laundry can be used to change the number of revolution per minute of a rotating drum in a drying machine to obtain laundry properly dried.
  • a laundry weight measure can be useful for determining the most appropriate amount of detergent and /or water to be used for washing laundry efficiently.
  • European Patent Application No. EP 1 258 556 discloses sensing means integrated in friction shock absorbers for detecting any drift/excursion in one or more of their spring elements. Such embodiment is however rather complex to be produced and requires to disassemble the whole machine in case of sensing means break. The latter drawback is due to the fact that the laundry treating chamber is suspended on said friction shock absorbers and therefore every intervention on them requires the treating chamber to be extracted from the machine.
  • EP 0 051 491 A further embodiment for measuring articles weight in a laundry treating machine is disclosed in European Patent Application No. EP 0 051 491 .
  • pressure responsive transducers are arranged between shock absorbers and a base portion of the cabinet.
  • Such solution has the same drawbacks mentioned above for the EP 1 258 556 disclosure.
  • strain gauges are proposed as electromechanical transducers for measuring weight of dishes in a dishwasher. Even if strain gauges may be arranged on machine supporting feet, i.e. in a place easy to be reached for a prompt substitution in case of break of a transducer, it must be noted that a strain gauge requires particular care and precision when it is installed and therefore complex assembling operations are required to produce the dishwasher or for performing maintenance interventions on it.
  • the aim of the present invention is therefore to solve the noted problems and thus providing a laundry treating machine having weight sensing means easy to be manufactured and ensuring a high reliability.
  • Another object of the present invention is to provide a laundry treating machine with weight sensing means that are easy to be installed and substituted in case of break without requiring machine cabinet disassembling operations.
  • Still another object of the present invention is to provide weight sensing means that can be installed in an already existing laundry treating machine with minimal modifications.
  • Figure 1 schematically shows a laundry treating machine according to the invention provided with weight sensing means
  • Figure 2 shows an enlarged view of weight sensing means of figure 1 ;
  • Figure 3 shows a second embodiment of weight sensing means applicable to the laundry treating machine of figure 1 ;
  • a laundry treating machine such as a washing machine, a dryer or a washer-dryer, comprises a cabinet 1 within which a treating chamber 2 is enclosed. Articles to be treated are placed into the treating chamber 2, such as a rotating drum, through an aperture 3 closed by a door. Foot members 4 are provided on a cabinet 1 outer base portion 5 for supporting the machine. Foot members 4 are threadly coupled to the base portion 5 to vertically modify the position of cabinet 1 in order to obtain proper horizontal adjustment.
  • Weight sensing means 6 are provided between cabinet 1 and one or more foot elements 4 for measuring weight of laundry contained in the treating chamber 2.
  • weight sensing means 6 comprise a couple of parallel, electrically conductive and spaced apart arms 7, 8 protruding from a transversal member 9 that joins them. Arms 7, 8 facing one another, define a clearance 10 between them and together with a transversal member 9 substantially form a "C" shaped structure working as a flat spring under the effect of machine and/or laundry weight.
  • First arm 7 has a hole for threadly receiving a foot element 4 and second arm 8 is associated in a known manner to the machine cabinet 1.
  • a detector 11 is placed within the clearance 10 for detecting a change of weight due, for example, to progressive laundry drying or to laundry loading/unloading operations.
  • arms 7, 8 change their relative position altering the distance between them, i.e. changing the clearance 10 dimension. Such change modifies the dielectric layer (in this case an air layer) between arms 7, 8.
  • Detector 11 comprises a measuring electrode 13 placed within the clearance 10, said electrode 13 is associated to the arm 8 interposing a layer of electrical insulating material. Arm 7 is polarized to a ground potential and together with measuring electrode 13 define a capacitor. Detector 11 is suitable for measuring capacitance change between arms 7, 8 by outputting signals corresponding to laundry weight change inside the chamber 2. The method for measuring said capacitance change is known per sè, for example a suitable method for carrying out such measurement is described in the pending European Patent Application No. EP 06 114 827.6 . Signals emitted by detector 11 are sent to a microcomputer (not shown in figures) via a wire 12 and they are used for adapting machine working operations in function of the laundry weight.
  • laundry load measure can be used for calculating the laundry humidity and consequently varying machine working parameters like temperature of drying air and/or number of revolutions per minute of the drum drying chamber.
  • laundry load can be used for calculating the most appropriate amount of detergent to be used, and/or for calculating whether a further spin cycle is needed.
  • Detector 11 can provide a weight measure both whether the treating chamber 2 contains laundry both whether it does not. In the latter case, measured weight corresponds to the whole machine weight when the chamber 2 is empty. Such a weight value can be taken as zero, i.e. as reference value, for measuring laundry weight after its introduction in the treating chamber 2. Laundry weight can be measured continuously during machine working operations, therefore treating cycles can be constantly monitored.
  • FIG 3 it is shown a second embodiment of weight sensing means 26 that can be provided between cabinet 1 and one or more foot elements 4 for measuring weight of laundry contained in the treating chamber 2.
  • Weight sensing means 26, similarly to what has been described with reference to figure 2 comprise a couple of parallel, electrically conductive and spaced apart arms 27, 28 protruding from a transversal member 29 that joins them. Arms 27, 28 facing one another, define a clearance 210 between them and together with the transversal member 29 substantially form a "C" shaped structure working as a flat spring under the effect of machine and/or laundry weight.
  • First arm 27 is divided in two portions 27a, 27b by an opening 220 extending from the transversal member 29 in a direction substantially perpendicular to said member 29. In this way, portions 27a, 27b can move independently one another relatively to the second arm 28. Portions 27a and 27b form with the second arm 28 a couple of gaps 210a, 210b respectively.
  • One portion 27a of the first arm 27 has a hole for threadly receiving a foot element 4, while the other portion 27b has no support function for the machine but simply protrudes from transversal member 29.
  • the second arm 28 is associated in a known manner to the machine cabinet 1.
  • a detector 211 is placed within the clearance 10 for detecting a change of weight due, for example, to progressive laundry drying or to laundry loading/unloading operations.
  • detector 211 comprises a couple of electrodes 213a and 213b associated to arm 28 in correspondence of gaps 210a and 210b respectively. Electrodes 213a and 213b are electrically isolated from arm 28. Portions 27a and 27b are polarized to a ground potential and together with electrodes 213a and 213b form two capacitors.
  • portion 27a and arm 28 change their relative position altering the distance D a between them, i.e. changing the dimension of gap 210a.
  • Such change modifies the dielectric layer (in this case an air layer) between portion 27a and arm 28.
  • Distance D b between portion 27b and arm 28 remains substantially unchanged during weight variation and therefore the capacitance measured by electrode 213b in gap 210b can be used as reference value for compensating errors in measurement of capacitance change provided by measuring electrode 213a in gap 210a due to environment conditions like electromagnetic fields and air moisture.
  • a laundry treating machine provided with weight sensing means according to the present invention is easy to be manufactured and allows the user to perform laundry treatments of improved quality.
  • the same machine can be produced with minimal modification starting from an already existing laundry machine. Interventions in case of weight sensing means break are advantageously simplified.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (8)

  1. Wäschebehandlungsmaschine, die einen Schrank (1) umfasst, welcher eine Behandlungskammer (2) zur Aufnahme von zu behandelnden Artikeln umschließt, und ferner umfassend Gewichtsfeststellungsmittel (6), die zwischen dem Schrank (1) und mindestens einem Fußelement (4) eingesetzt sind, das an einem äußeren Sockelabschnitt (5) des Schrankes (1) zur Lagerung der Maschine vorgesehen ist, dadurch gekennzeichnet, dass die Gewichtsfeststellungsmittel (6, 26) einen ersten elektrisch leitenden Arm (7, 27) umfassen, der das Fußelement (4) und einen dem Schrank (1) zugeordneten, zweiten elektrisch leitenden Arm (8, 28) aufnimmt, wobei die Arme (7, 27, 8, 28) parallel zueinander von einem quer liegenden Verbindungselement (9, 29) vorragen, wodurch ein Abstand (10, 210) dazwischen geschaffen wird, wobei in diesem Abstand (10, 210) ein Detektor (11, 211) angeordnet ist, der ein Ausgangssignal abgibt, welches eine Kapazitätsänderung in Entsprechung zu einer Gewichtsänderung der Artikel anzeigt.
  2. Wäschebehandlungsmaschine gemäß Anspruch 1, wobei der erste elektrisch leitende Arm (7, 27) zu einem Erdpotenzial polarisiert ist und der Detektor (11, 211) eine Messelektrode (13, 213a) umfasst, die in dem Abstand (10, 210) platziert ist und dem zweiten Arm (8, 28) zugeordnet und von diesem elektrisch isoliert ist.
  3. Wäschebehandlungsmaschine gemäß Anspruch 1 oder 2, die ferner einen Mikrocomputer zum Empfangen des Signalausgangs vom Detektor (11, 211) und zur Anpassung des Arbeitsbetriebs der Maschine umfasst.
  4. Wäschebehandlungsmaschine gemäß einem der vorangehenden Ansprüche, wobei die Arme (7, 27, 8, 28) und das quer liegende Verbindungselement (9, 29) eine "C"-förmige Struktur begrenzen.
  5. Wäschebehandlungsmaschine gemäß einem der vorangehenden Ansprüche, wobei der erste Arm (27) durch eine Öffnung (220), die sich vom Verbindungselement (29) in eine im Wesentlichen vertikale Richtung zu diesem erstreckt, in zwei Abschnitte (27a, 27b) unterteilt wird.
  6. Wäschebehandlungsmaschine gemäß Anspruch 5, wobei jeder der zwei Abschnitte (27a, 27b) mit dem zweiten elektrisch leitenden Arm (28) einen Spalt (210a, 210b) begrenzt.
  7. Wäschebehandlungsmaschine gemäß Anspruch 6, wobei ein Paar Elektroden 213a, 213b dem zweiten Arm (28) zugeordnet und in Entsprechung zu den Spalten (210a, 210b) von diesem elektrisch isoliert sind, und wobei diese Abschnitte (27a, 27b) zu einem Erdpotenzial polarisiert sind.
  8. Wäschebehandlungsmaschine gemäß einem der Ansprüche 5 bis 7, wobei einer der Abschnitte (27a, 27b) ein Loch zur Aufnahme des Fußelements (4) mittels eines Gewindes aufweist.
EP07101440A 2007-01-30 2007-01-30 Wäschebehandlungsmaschine mit Gewichtssensoren Not-in-force EP1953291B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT07101440T ATE466127T1 (de) 2007-01-30 2007-01-30 Wäschebehandlungsmaschine mit gewichtssensoren
EP07101440A EP1953291B1 (de) 2007-01-30 2007-01-30 Wäschebehandlungsmaschine mit Gewichtssensoren
ES07101440T ES2343904T3 (es) 2007-01-30 2007-01-30 Maquina para tratamiento de ropa de lavanderia con un medio de deteccion del peso.
PL07101440T PL1953291T3 (pl) 2007-01-30 2007-01-30 Maszyna do obróbki prania z elementami czujnikowymi ciężaru
DE602007006148T DE602007006148D1 (de) 2007-01-30 2007-01-30 Wäschebehandlungsmaschine mit Gewichtssensoren
RU2008103369/12A RU2433215C2 (ru) 2007-01-30 2008-01-29 Устройство для обработки белья со средством измерения веса

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07101440A EP1953291B1 (de) 2007-01-30 2007-01-30 Wäschebehandlungsmaschine mit Gewichtssensoren

Publications (2)

Publication Number Publication Date
EP1953291A1 EP1953291A1 (de) 2008-08-06
EP1953291B1 true EP1953291B1 (de) 2010-04-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07101440A Not-in-force EP1953291B1 (de) 2007-01-30 2007-01-30 Wäschebehandlungsmaschine mit Gewichtssensoren

Country Status (6)

Country Link
EP (1) EP1953291B1 (de)
AT (1) ATE466127T1 (de)
DE (1) DE602007006148D1 (de)
ES (1) ES2343904T3 (de)
PL (1) PL1953291T3 (de)
RU (1) RU2433215C2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0804071A2 (pt) * 2008-09-12 2010-07-06 Whirlpool Sa máquina de lavar roupa com um sistema sensor
DE202009019111U1 (de) * 2009-08-14 2016-07-22 Soehnle Industrial Solutions Gmbh Wäschebehandlungsmaschine mit einer Vorrichtung zur Bestimmung des Gewichts einer Zuladung
CN105970555B (zh) * 2015-03-12 2019-11-08 青岛海尔洗衣机有限公司 一种洗衣机自动称重装置
EP3332165B1 (de) * 2015-08-03 2019-06-19 Ngi A/S Verfahren zur herstellung eines signals für den druckzustand im als kontaktfläche dienenden gummielastischen körper eines maschinenfusses sowie maschine mit hydrostatischem drucksensor
WO2019204948A1 (en) * 2018-04-27 2019-10-31 V-Zug Ag Laundry treatment appliance with weight sensor
US11098948B2 (en) 2019-06-04 2021-08-24 Whirlpool Corporation Water dispensing system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2034847A1 (de) * 1970-07-07 1972-01-27 Siemens Elektrogeraete Gmbh Mit einem Gehäuse versehene Waschmaschine
US6460381B1 (en) * 1999-03-29 2002-10-08 Sanyo Electric Co., Ltd. Washing machine or an apparatus having a rotatable container
JP2000288289A (ja) * 1999-04-02 2000-10-17 Sanyo Electric Co Ltd 洗濯機、及び回転容器を備える装置
DE10122749B4 (de) * 2001-05-10 2005-01-27 Miele & Cie. Kg Waschmaschine mit einer Einrichtung zur Bestimmung des Wäschegewichts und Verfahren zur Bestimmung des Wäschegewichts

Also Published As

Publication number Publication date
RU2008103369A (ru) 2009-08-10
PL1953291T3 (pl) 2010-09-30
EP1953291A1 (de) 2008-08-06
ES2343904T3 (es) 2010-08-12
RU2433215C2 (ru) 2011-11-10
ATE466127T1 (de) 2010-05-15
DE602007006148D1 (de) 2010-06-10

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