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EP1507031A1 - Appareil de chauffage pour une machine à laver et méthode pour le commander - Google Patents

Appareil de chauffage pour une machine à laver et méthode pour le commander Download PDF

Info

Publication number
EP1507031A1
EP1507031A1 EP04002018A EP04002018A EP1507031A1 EP 1507031 A1 EP1507031 A1 EP 1507031A1 EP 04002018 A EP04002018 A EP 04002018A EP 04002018 A EP04002018 A EP 04002018A EP 1507031 A1 EP1507031 A1 EP 1507031A1
Authority
EP
European Patent Office
Prior art keywords
water
water level
steam
level
steam generator
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
EP04002018A
Other languages
German (de)
English (en)
Other versions
EP1507031B1 (fr
Inventor
Soo Young Oh
Kyung Chul Woo
Jin Woong Kim
Si Moon Jeon
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1507031A1 publication Critical patent/EP1507031A1/fr
Application granted granted Critical
Publication of EP1507031B1 publication Critical patent/EP1507031B1/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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/40—Steam generating arrangements

Definitions

  • the present invention relates to a heating apparatus for heating laundry of a washing machine, and more particularly, to a heating apparatus for heating laundry by directly spraying steam into the laundry and a control method thereof.
  • FIG. 1 is a sectional view of a washing machine in accordance with the conventional art.
  • the drum washing machine comprises: a cabinet 102 for forming an appearance; a tub 104 arranged in the cabinet 102 for storing washing water; a drum 106 rotatably arranged in the tub 104 for washing and dehydrating laundry; and a driving motor 110 connected to the drum 106 by a driving shaft 108 for rotating the drum 106.
  • the tub 104 is shock-absorbingly supported in the cabinet 102 by dampers 120 and 122, and a heater 130 for heating washing water stored in the tub 104 is installed at a lower portion of the tub 104.
  • a lower portion of the tub 104 has to be provided with enough space for mounting the heater 130, and water level more than a certain height has to be maintained in the tub 104 so that the heater 130 can be sufficiently soaked by washing water.
  • washing water is supplied into the tub 104. Then, if the water level of the tub 104 reaches a set level, the heater 130 is operated thus to heat the washing water. At the same time, a driving motor 110 is driven with a forward rotation or a reverse rotation thus to perform a washing operation. According to this, when temperature of the washing water reaches a set temperature, the heater 130 becomes off.
  • washing water is heated by the heater 130 thus to increase a consumption electric power of the heater, to increase a detergent amount, and to lengthen washing time.
  • an object of the present invention is to provide a heating apparatus of a washing machine capable of reducing an entire size of the washing machine, reducing an amount of washing water, minimizing a consumption electric power, and reducing washing time by heating laundry by directly spraying steam into the laundry by a steam generator provided at the washing machine.
  • a heating apparatus of a washing machine comprising: a steam generator for generating steam; and a spray nozzle for spraying steam generated from the steam generator into a drum.
  • the steam generator is provided with a water level sensor for detecting a level of water supplied for steam generation step by step.
  • the steam generator comprises: a hermetic container to which a water supply tube for supplying water and a steam exhaustion tube for exhausting generated steam are respectively connected; a heater arranged at a bottom of the hermetic container for heating water supplied into the hermetic container; and a water level sensor mounted in the hermetic container for detecting a level of water supplied into the hermetic container step by step.
  • the water level sensor comprises: one common electrode bar; a plurality of water level detecting electrode bars of different lengths; and a supporting member for mounting the common electrode bar and the plurality of water level detecting electrode bars with an insulated state.
  • a heating method of a washing machine comprising: a first step of supplying water into a steam generator; a second step of detecting whether a level of water supplied into the steam generator has reached a set level; a third step of generating steam by turning on a heater when the level of water has reached a set level in the second step; and a fourth step of performing a washing operation when steam generated from the steam generator has been supplied into a drum and thereby temperature inside the drum has reached a set temperature in the third step.
  • Figure 2 is a perspective view showing an opened front surface of a washing machine according to the present invention.
  • the washing machine comprises: a cabinet 10 for forming an appearance thereof; an outer tub 14 shock-absorbingly supported by a damper 12 in the cabinet 10 for storing washing water; an inner tub (drum) 16 rotatably arranged in the outer tub 14 for washing and dehydrating laundry; and a heating unit arranged at an upper side of the cabinet 10 for spraying steam into laundry received into the inner tub 16.
  • a detergent box 20 connected to a water supply tube 18 is installed at an upper side of the outer tub 14 thus to supply detergent with washing water into the outer tub 14.
  • the heating unit is composed of a steam generator 24 arranged at an upper side of the cabinet 10 for generating steam, and a spray nozzle 26 for spraying steam generated from the steam generator 24 into the inner tub 16. Also, a circulation pump 28 for pumping water exhausted from the outer tub 16 and thereby re-supplying into the inner tub 16 through the spray nozzle 26 is installed at a lower side of the cabinet 10.
  • a diverge unit 30 for preventing circulation water circulated by a pumping power of the circulation pump 28 from being mixed with steam generated from the steam generator 24 is installed at the spray nozzle 26.
  • the steam generator 24 is connected to a water supply tube 32 thus to receive water from outside, and connected to the diverge unit 30 by a steam supply tube 34.
  • a water supply valve 40 for opening and closing the water supply tube 32 is mounted at one side of the water supply tube 32.
  • the circulation pump 28 is connected to an exhaustion pipe 36 for exhausting washing water stored in the outer tub 14, and is connected to the diverge unit 30 by a circulation tube 38.
  • a temperature sensor 42 for detecting temperature inside the inner tub 16 at the time of spraying steam into the inner tub 16 through the spray nozzle 26 is installed in the inner tub 16.
  • Figure 3 is a partially-cut perspective view of the steam generator of the washing machine according to the present invention.
  • the steam generator 24 comprises: a hermetic container 50 to which a water supply tube 32 and a steam exhaustion tube 34 are respectively connected; a heater 52 arranged at a bottom of the hermetic container 50 for heating water supplied into the hermetic container 50; and a water level sensor 54 mounted in the hermetic container for detecting a level of water supplied into the hermetic container 50 step by step.
  • An upper container 56 and a lower container 58 of the hermetic container 50 are hermetically mounted with a certain space therein.
  • a water supply port 60 connected to the water supply tube 32 is formed at one side of the upper container 56, and a steam exhaustion port 62 connected to the steam supply tube 34 for exhausting steam generated in the hermetic container 50 is formed at the lower container 58.
  • the water level sensor 54 comprises: one common electrode bar 70; a plurality of water level detecting electrode bars 72 and 74 of different lengths; and a supporting member 76 hermetically mounted at the hermetic container 50 and for mounting the common electrode bar 70 and the plurality of water level detecting electrode bars 72 and 74 with an insulated state.
  • the common electrode bar 70 is the longest. Also, the water level detecting electrode bars 72 and 74 have a different length each other in order to detect a water level step by step. Under this state, if the common electrode bar 70 and one of the water level detecting electrode bars 72 and 74 are in contact with water, the common electrode bar 70 is electrically connected to one of the water level detecting electrode bars thus to generate a voltage. At this time, voltages generated from the water level detecting electrode bars 72 and 74 are different each other, thereby detecting a water level by a voltage difference.
  • the water level detecting electrode bars 72 and 74 are composed of a first electrode 72 for detecting a lowest water level L1 supplied into the hermetic container 50, and a second electrode 74 for detecting a highest water level L2.
  • the water level detecting electrode bars are not limited to the first electrode 72 and the second electrode 74, but can be constituted as plural electrodes in order to detect a middle water level.
  • the first electrode 72 has a length for detecting the lowest water level L1 that the heater 52 can be immersed in water.
  • the second electrode 74 has a certain length for maintaining a minimum space inside the hermetic container 50 capable of generating steam.
  • the supporting member 76 is formed of material for insulation and a hermetic state, and is hermetically mounted at the upper container 56.
  • the common electrode bar 70 and the plurality water level detecting electrode bars 72 and 74 are vertically mounted at the supporting member 76 with an insulated state.
  • FIG. 5 is a block diagram showing a heating method of a heating apparatus of the washing machine according to the present invention.
  • the heating apparatus comprises a temperature sensor 42 installed at one side of the inner tub for detecting temperature of the inner tub, a water level sensor 54 installed in the steam generator 24 for detecting a level of water supplied into the steam generator 24 step by step, and a controller 80 for controlling an operation of the water supply valve 40 and the heater 52 according to a signal applied from the temperature sensor 42 and the water level sensor 54.
  • the heating apparatus for heating laundry by steam can be applied not only the drum washing machine aforementioned as the preferred embodiment but also any washing machine.
  • Figure 6 is a flow chart showing the heating method of the washing machine according to the present invention.
  • water is supplied into the steam generator 24 through the water supply tube 32 (S20).
  • a level of water supplied into the steam generator 24 has reached a first setting level T1 (S3). That is, when water is supplied into the hermetic container 50 of the steam generator 24 and thereby the second electrode bar 74 of the water level sensor 54 is in contact with water, the common electrode 70 and the second electrode bar 74 are electrically connected to each other by water thus to generate a voltage. The generated voltage is detected by the controller 80 and thereby a water level is judged.
  • the water which has been supplied into the hermetic container 50 is heated by the heater 52 thus to generate steam, and the steam generated in the hermetic container 50 is supplied into the inner tub 16 through the steam supply tube 34 thus to heat the laundry.
  • a water level inside the hermetic container 50 is lower than a second setting level T2 (S60). That is, it is judged whether a water level inside the hermetic container 50 is lower than the lowest water level that the first electrode bar 72 is not in contact with water.
  • the heater is turned off (S70). Then, it is judged whether temperature inside the inner tub 16 has reached a set temperature (S80). That is, the controller 80 compares a set temperature selected by the user with a temperature inside the inner tub 16 applied from the temperature sensor 42.
  • the steam generator is provided and the laundry is heated by spraying steam into the tub, thereby reducing an entire size of the washing machine, reducing an amount of washing water, minimizing a consumption electric power, and reducing washing time.
  • the water level sensor for detecting a level of water supplied into the steam generator is constituted with the plurality of electrode bars thus to detect a water level inside the steam generator more accurately, thereby enhancing a performance of the heating apparatus.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
EP04002018A 2003-08-13 2004-01-30 Appareil de chauffage pour une machine à laver et méthode pour le commander Expired - Lifetime EP1507031B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2003-0056267A KR100500887B1 (ko) 2003-08-13 2003-08-13 드럼 세탁기의 증기발생장치 및 그 방법
KR2003056267 2003-08-13

Publications (2)

Publication Number Publication Date
EP1507031A1 true EP1507031A1 (fr) 2005-02-16
EP1507031B1 EP1507031B1 (fr) 2009-07-22

Family

ID=33563047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04002018A Expired - Lifetime EP1507031B1 (fr) 2003-08-13 2004-01-30 Appareil de chauffage pour une machine à laver et méthode pour le commander

Country Status (5)

Country Link
US (1) US20050034250A1 (fr)
EP (1) EP1507031B1 (fr)
KR (1) KR100500887B1 (fr)
CN (1) CN100387769C (fr)
DE (1) DE602004022113D1 (fr)

Cited By (24)

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Publication number Priority date Publication date Assignee Title
EP1696066A2 (fr) * 2005-02-25 2006-08-30 LG Electronics Inc. Machine à laver et procédé de lavage
WO2006098572A1 (fr) * 2005-03-17 2006-09-21 Lg Electronics Inc. Detecteur de niveau d’eau d’un appareil generant de la vapeur pour lave-linge ou seche-linge et appareil generant de la vapeur pourvu de ce detecteur
WO2006101312A1 (fr) * 2005-03-25 2006-09-28 Lg Electronics Inc. Machine a laver et procede de commande de la machine
WO2006104310A1 (fr) 2005-03-29 2006-10-05 Lg Electronics Inc. Procédé de lavage à la vapeur pour machine à laver et machine à laver utilisant celui-ci
WO2006126779A1 (fr) * 2005-05-23 2006-11-30 Lg Electronics Inc. Detecteur de niveau d'eau pour generateur de vapeur
WO2006129912A1 (fr) * 2005-05-31 2006-12-07 Lg Electronics Inc. Machine a laver generant et utilisant de la vapeur
WO2006129916A1 (fr) 2005-05-31 2006-12-07 Lg Electronics Inc. Machine a laver le linge
WO2006129913A1 (fr) 2005-05-31 2006-12-07 Lg Electronics Inc. Procede de commande d'un lave-linge
WO2006129915A1 (fr) * 2005-05-31 2006-12-07 Lg Electronics Inc. Lave-linge
DE102007012135B3 (de) * 2007-03-12 2008-06-19 Miele & Cie. Kg Verfahren zum Betreiben einer Waschmaschine oder eines Waschtrockners oder einer elektrischen Heizeinrichtung in einer Waschmaschine oder einem Waschtrockner sowie Waschmaschine oder Waschtrockner und Heizeinrichtung
WO2008075849A2 (fr) * 2006-12-19 2008-06-26 Lg Electronics Inc. Machine de blanchisserie
FR2920161A1 (fr) * 2007-08-24 2009-02-27 Brandt Ind Sas Procede de regulation de debit d'eau durant une phase de generation de vapeur d'une machine a secher le linge et machine a secher le linge
US7565822B2 (en) 2005-03-16 2009-07-28 Lg Electronics Inc. Washing machine using steam and method for controlling the same
US7600402B2 (en) 2003-11-04 2009-10-13 Lg Electronics Inc. Washing apparatus and control method thereof
US7904981B2 (en) 2006-08-15 2011-03-15 Whirlpool Corporation Water supply control for a steam generator of a fabric treatment appliance
US7913339B2 (en) 2006-08-15 2011-03-29 Whirlpool Corporation Water supply control for a steam generator of a fabric treatment appliance using a temperature sensor
CN1989287B (zh) * 2005-05-31 2011-06-08 Lg电子株式会社 洗衣机
EP2383383A1 (fr) * 2010-04-28 2011-11-02 Miele & Cie. KG Procédé de fonctionnement d'un lave-linge et lave-linge
EP2385165A1 (fr) 2010-05-03 2011-11-09 Electrolux Home Products Corporation N.V. Générateur de vapeur comportant un capteur de niveau de liquide et procédé pour déterminer le niveau de liquide dans un réservoir
US8209805B2 (en) 2005-03-25 2012-07-03 Lg Electronics Inc. Operating method in washing machine
EP2522768A1 (fr) * 2011-05-11 2012-11-14 Electrolux Home Products Corporation N.V. Appareil de traitement d'étoffes fourni avec une génération de vapeurs et procédé de contrôle de quantité de vapeur générée
US8312642B2 (en) 2007-06-08 2012-11-20 Lg Electronics Inc. Controlling method of a steam generator and a laundry machine with the same
EP2818593A1 (fr) * 2013-06-25 2014-12-31 Electrolux Appliances Aktiebolag Appareil ménager pour le traitement du linge comportant un réservoir d'eau
US10844533B2 (en) 2007-05-07 2020-11-24 Whirlpool Corporation Method for controlling a household washing machine

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US20070163094A1 (en) * 2005-12-30 2007-07-19 Tremitchell Wright Fabric revitalizing method using mist
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US7918109B2 (en) 2007-08-31 2011-04-05 Whirlpool Corporation Fabric Treatment appliance with steam generator having a variable thermal output
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EP2402498A1 (fr) 2010-07-02 2012-01-04 Miele & Cie. KG Procédé de fonctionnement d'une machine de traitement du linge à l'aide d'un dispositif de production de vapeur et machine de traitement du linge
JP2014150814A (ja) * 2013-02-05 2014-08-25 Panasonic Corp 衣類乾燥機
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CN104846611A (zh) * 2015-05-21 2015-08-19 无锡小天鹅股份有限公司 衣物处理设备
CN106968080A (zh) 2016-01-14 2017-07-21 青岛海尔滚筒洗衣机有限公司 一种利用蒸汽进行衣物洗涤的方法
CN113493995B (zh) * 2020-03-20 2024-01-09 重庆海尔洗衣机有限公司 洗衣机外桶及洗衣机

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CN100387769C (zh) 2008-05-14
EP1507031B1 (fr) 2009-07-22
CN1580369A (zh) 2005-02-16
DE602004022113D1 (de) 2009-09-03
KR20050017489A (ko) 2005-02-22

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