EP1413664A1 - Procédé et dispositif pour mesurer l'humidité du linge dans une machine à laver ou un sèche-linge - Google Patents

Procédé et dispositif pour mesurer l'humidité du linge dans une machine à laver ou un sèche-linge Download PDF

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Publication number
EP1413664A1
EP1413664A1 EP20020425637 EP02425637A EP1413664A1 EP 1413664 A1 EP1413664 A1 EP 1413664A1 EP 20020425637 EP20020425637 EP 20020425637 EP 02425637 A EP02425637 A EP 02425637A EP 1413664 A1 EP1413664 A1 EP 1413664A1
Authority
EP
European Patent Office
Prior art keywords
condenser
linen
capacity
plate
control device
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
EP20020425637
Other languages
German (de)
English (en)
Other versions
EP1413664B1 (fr
Inventor
Marco Righetti
Attilio Bissoli
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.)
Bonferraro SpA
Original Assignee
Bonferraro 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 Bonferraro SpA filed Critical Bonferraro SpA
Priority to EP02425637A priority Critical patent/EP1413664B1/fr
Priority to AT02425637T priority patent/ATE277220T1/de
Priority to DE60201356T priority patent/DE60201356T2/de
Priority to ES02425637T priority patent/ES2227418T3/es
Priority to SI200230029T priority patent/SI1413664T1/xx
Publication of EP1413664A1 publication Critical patent/EP1413664A1/fr
Application granted granted Critical
Publication of EP1413664B1 publication Critical patent/EP1413664B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/20—Operation modes, e.g. delicate laundry washing programs, service modes or refreshment cycles
    • 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
    • D06F2103/08—Humidity
    • D06F2103/10—Humidity expressed as capacitance or resistance
    • 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

Definitions

  • the present invention relates to a method for measuring the humidity of the linen in washing-machines, clothes-dryers and the like, and particularly to a method that allows to automatically control the drying of the linen according to the humidity thereof.
  • the present invention relates also to a system for carrying out said method.
  • the clothes-dryers and many washing-machines comprise a drying system wherein warm air flows to dry linen.
  • These electric household appliances generally do not comprise a linen humidity measuring system, so that the user has to set a drying program by choosing its duration according to a table provided by the constructors, with consequent excessive and useless consumptions if the maximum duration is always set, or with variable and not always optimal results if the duration indicated by table is set.
  • the present systems for measuring humidity are based on a linen conductivity measurement, that is on the resistivity thereof, which varies as a function of humidity.
  • This measuring method being directly carried out on linen, causes the two following drawbacks that make said known systems complex and expensive.
  • the measurement electronic circuit must ensure the perfect insulation between the main network power source and the measurement signal of the linen resistivity, in order to overcome the normative dielectric rigidity tests. This causes a considerable increase of the complexity and the costs of the control electronics, which otherwise would be simple and economic for this products category.
  • the object of the present invention is therefore to provide a method and a measuring system which are free from said drawbacks, i.e. which are simple, reliable, safe and cheap.
  • This object is achieved with a method and a system whose main features are specified respectively in claims 1 and 9, while other features are specified in the remaining claims.
  • the method and the system according to the present invention are based on the measurement of the variations of the electric permittivity or dielectric constant of the linen during the drying program and on the conversion of this permittivity, by means of a suitable control device, into a quantity, for example a voltage or a frequency, which depends on the humidity of the same linen.
  • the system according to the present invention thus allows to automatically adjust the duration of the drying program according to one or more drying levels selectable by the user, thus obtaining a constructive simplification of the apparatus in which it is inserted, as well as an easier use thereof.
  • the user can directly choose the drying degree of the linen at the end of the washing cycle without worrying about the definition of the duration of the drying period.
  • a washing-machine 1 provided with the system according to the present invention comprises in a known way a door 2 for introducing linen 3 in the washing basket 4.
  • Door 2 generally has a circular shape and comprises a metal frame 2a in which a glass chamber cylindrically or frustoconically shaped provided with an inner wall 2b and an outer wall 2c, both substantially circular, is inserted.
  • a metal plate 5 is fixed, for example with a biadhesive tape, to the outer surface of the inner wall 2b of door 2.
  • the metal plate 5 has a substantially semicircular shape and is arranged in the lower half of wall 2b.
  • the outer wall 2c of door 2 prevents from a possible direct contact of the user with the metal plate 5, thus avoiding the measure to be altered by eddy conductivities introduced by this contact.
  • the latter is earthed in a known way, while plate 5 is connected to an electric and/or electronic control device 8, which measures the capacity C of the condenser 6 and supplies a control signal to the drying system of the washing-machine 1 according to the measured capacity C.
  • control device 8 can comprise a charge transfer sensor, for example a Q-PROXTM device of the firm Quantum.
  • this sensor comprises a reference condenser 9 which has a known and constant capacity Cr and is connected in parallel to condenser 6 as well as to a reference voltage generator 10 which supplies a known and constant voltage Vr at the terminals of condensers 6 and 9.
  • the voltage generator 10 can be separated by condenser 6 through a first switch 11, while condensers 6 and 9 can be separated one from the other through a second switch 12, as well as short-circuited by a third switch 13. Condensers 6 and 9, apart from being connected in parallel one to the other, are also connected in series between the earth and an amplifier 14.
  • Figure 4 shows an experimental diagram containing a graph 15 of the real measure of the voltage A x Vs in volt during the drying cycle, as well as a graph 16 corresponding to an average of two adjacent values of graph 15.
  • control device 8 can comprise an astable multivibrator, in particular a square wave generator, for measuring the capacity C of condenser 6.
  • the frequency of the wave generated by the astable multivibrator is inversely proportional to a product RC, where R is a resistive component and C is a capacitive component depending on the used circuit. If the resistive component is kept constant, the variations of the capacitive components cause a variation of the frequency of the signal generated by the astable generator.
  • Figure 5 shows an astable generator which uses an integrated circuit 17, for example a known NE555 integrated circuit, which is connected to a pair of resistors 18 and 19, in turn connected in series between a source of direct current Vcc and the earthed condenser 6.
  • the astable multivibrator can further comprise a diode 20 connected in parallel to resistor 19 to obtain a duty cycle of the square output wave of 50% when the resistances of resistors 18 and 19 are the same.
  • the integrated circuit 17 may further be earthed through a condenser 21 acting as a filter.
  • a measurement of the frequency of the output signal Vs before and during the drying can thus give information about the progress of the humidity of linen 3 and allow the automatic regulation of the drying cycle in the washing-machine 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
EP02425637A 2002-10-21 2002-10-21 Procédé et dispositif pour mesurer l'humidité du linge dans une machine à laver ou un sèche-linge Expired - Lifetime EP1413664B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP02425637A EP1413664B1 (fr) 2002-10-21 2002-10-21 Procédé et dispositif pour mesurer l'humidité du linge dans une machine à laver ou un sèche-linge
AT02425637T ATE277220T1 (de) 2002-10-21 2002-10-21 Verfahren und vorrichtung zur messung der wäschefeuchtigkeit in waschmaschinen oder wäschetrocknern
DE60201356T DE60201356T2 (de) 2002-10-21 2002-10-21 Verfahren und Vorrichtung zur Messung der Wäschefeuchtigkeit in Waschmaschinen oder Wäschetrocknern
ES02425637T ES2227418T3 (es) 2002-10-21 2002-10-21 Metodo y sistema para medir la humedad de la ropa en maquinas lavadoras, secadoras y similares.
SI200230029T SI1413664T1 (en) 2002-10-21 2002-10-21 Method and system for measuring the linen humidity in washing machines, dryers and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02425637A EP1413664B1 (fr) 2002-10-21 2002-10-21 Procédé et dispositif pour mesurer l'humidité du linge dans une machine à laver ou un sèche-linge

Publications (2)

Publication Number Publication Date
EP1413664A1 true EP1413664A1 (fr) 2004-04-28
EP1413664B1 EP1413664B1 (fr) 2004-09-22

Family

ID=32050157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02425637A Expired - Lifetime EP1413664B1 (fr) 2002-10-21 2002-10-21 Procédé et dispositif pour mesurer l'humidité du linge dans une machine à laver ou un sèche-linge

Country Status (5)

Country Link
EP (1) EP1413664B1 (fr)
AT (1) ATE277220T1 (fr)
DE (1) DE60201356T2 (fr)
ES (1) ES2227418T3 (fr)
SI (1) SI1413664T1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3162952A1 (fr) 2015-10-26 2017-05-03 Electrolux Appliances Aktiebolag Appareil de séchage de linge avec un degré de séchage de linge capacitif à fonction de détection
CN107313228A (zh) * 2016-04-26 2017-11-03 伊莱克斯家用电器股份公司 用于操作衣物干燥装置的方法以及衣物干燥装置
WO2018121849A1 (fr) * 2016-12-28 2018-07-05 Electrolux Appliances Aktiebolag Appareil de blanchisserie comprenant un capteur d'humidité
WO2019170233A1 (fr) 2018-03-07 2019-09-12 Electrolux Appliances Aktiebolag Appareil équipé d'un capteur d'humidité capacitif
US11686041B2 (en) 2016-12-28 2023-06-27 Electrolux Appliances Aktiebolag Appliance with reliable information of a drying cycle
WO2024188202A1 (fr) * 2023-03-10 2024-09-19 青岛海尔洗衣机有限公司 Appareil de traitement de vêtements, procédé de mesure d'humidité de vêtements et procédé de mesure de séchage de vêtements

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008031774B4 (de) * 2008-07-04 2010-04-15 Ident Technology Ag Sensoreinrichtung zur Bestimmung der Menge und/oder des Feuchtegrads von Wäsche in einem Wäschetrockner
EP3239390B1 (fr) 2016-04-26 2019-11-06 Electrolux Appliances Aktiebolag Procédé pour faire fonctionner un appareil de séchage de linge et appareil de séchage de linge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1935511A1 (de) * 1969-07-12 1971-01-21 Miele & Cie Trockner-Steuerung
DE19651883C1 (de) * 1996-12-13 1998-04-02 Telefunken Microelectron Verfahren zur Ermittlung des Trocknungsgrades von Trocknungsgütern und Anordnungen zur Durchführung dieses Verfahrens
US5737852A (en) * 1996-08-05 1998-04-14 White Consolidated Industries, Inc. Dryness control for clothes dryer
EP0967319A1 (fr) * 1998-06-25 1999-12-29 Miele & Cie. GmbH & Co. Procédé et dispositif pour déterminer l'humidité résiduelle du linge dans un sèche-linge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1935511A1 (de) * 1969-07-12 1971-01-21 Miele & Cie Trockner-Steuerung
US5737852A (en) * 1996-08-05 1998-04-14 White Consolidated Industries, Inc. Dryness control for clothes dryer
DE19651883C1 (de) * 1996-12-13 1998-04-02 Telefunken Microelectron Verfahren zur Ermittlung des Trocknungsgrades von Trocknungsgütern und Anordnungen zur Durchführung dieses Verfahrens
EP0967319A1 (fr) * 1998-06-25 1999-12-29 Miele & Cie. GmbH & Co. Procédé et dispositif pour déterminer l'humidité résiduelle du linge dans un sèche-linge

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11248334B2 (en) 2015-10-26 2022-02-15 Electrolux Appliances Aktiebolag Laundry appliance with capacitive laundry drying degree sensing function
CN108138432A (zh) * 2015-10-26 2018-06-08 伊莱克斯家用电器股份公司 具有电容式衣物干燥程度感测功能的衣物器具
EP3162952A1 (fr) 2015-10-26 2017-05-03 Electrolux Appliances Aktiebolag Appareil de séchage de linge avec un degré de séchage de linge capacitif à fonction de détection
AU2016344550B2 (en) * 2015-10-26 2022-01-06 Electrolux Appliances Aktiebolag Laundry appliance with capacitive laundry drying degree sensing function
CN108138432B (zh) * 2015-10-26 2020-11-17 伊莱克斯家用电器股份公司 具有电容式衣物干燥程度感测功能的衣物器具
US10676859B2 (en) 2015-10-26 2020-06-09 Electrolux Appliances Aktiebolog Laundry appliance with capacitive laundry drying degree sensing function
WO2017072016A1 (fr) * 2015-10-26 2017-05-04 Electrolux Appliances Aktiebolag Appareil de lessive à fonction de détection de degré de séchage de linge
CN107313228B (zh) * 2016-04-26 2021-05-07 伊莱克斯家用电器股份公司 用于操作衣物干燥装置的方法以及衣物干燥装置
CN107313228A (zh) * 2016-04-26 2017-11-03 伊莱克斯家用电器股份公司 用于操作衣物干燥装置的方法以及衣物干燥装置
CN110088383A (zh) * 2016-12-28 2019-08-02 伊莱克斯家用电器股份公司 包括湿度传感器的衣物器具
US11193228B2 (en) 2016-12-28 2021-12-07 Electrolux Appliances Aktiebolag Laundry appliance comprising a humidity sensor
WO2018121849A1 (fr) * 2016-12-28 2018-07-05 Electrolux Appliances Aktiebolag Appareil de blanchisserie comprenant un capteur d'humidité
US11686041B2 (en) 2016-12-28 2023-06-27 Electrolux Appliances Aktiebolag Appliance with reliable information of a drying cycle
US12553173B2 (en) 2016-12-28 2026-02-17 Electrolux Appliances Aktiebolag Appliance with reliable information of a drying cycle
WO2019170233A1 (fr) 2018-03-07 2019-09-12 Electrolux Appliances Aktiebolag Appareil équipé d'un capteur d'humidité capacitif
US11920272B2 (en) 2018-03-07 2024-03-05 Electrolux Appliances Aktiebolag Appliance with capacitive humidity sensor
WO2024188202A1 (fr) * 2023-03-10 2024-09-19 青岛海尔洗衣机有限公司 Appareil de traitement de vêtements, procédé de mesure d'humidité de vêtements et procédé de mesure de séchage de vêtements

Also Published As

Publication number Publication date
EP1413664B1 (fr) 2004-09-22
DE60201356T2 (de) 2005-11-17
ES2227418T3 (es) 2005-04-01
DE60201356D1 (de) 2004-10-28
SI1413664T1 (en) 2005-06-30
ATE277220T1 (de) 2004-10-15

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