EP1507031B1 - 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 PDFInfo
- Publication number
- EP1507031B1 EP1507031B1 EP04002018A EP04002018A EP1507031B1 EP 1507031 B1 EP1507031 B1 EP 1507031B1 EP 04002018 A EP04002018 A EP 04002018A EP 04002018 A EP04002018 A EP 04002018A EP 1507031 B1 EP1507031 B1 EP 1507031B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- washing machine
- level
- water level
- steam
- 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.)
- Expired - Lifetime
Links
- 238000005406 washing Methods 0.000 title claims description 69
- 238000000034 method Methods 0.000 title claims description 12
- 238000010438 heat treatment Methods 0.000 title description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 131
- 238000005507 spraying Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 6
- 239000008236 heating water Substances 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims 2
- 239000003599 detergent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- D06F39/40—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.
- JP 2003 019382 discloses a washing machine and an operation according to the preamble of claims 1 and 13, respectively.
- 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.
- 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 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)
Claims (19)
- Machine à laver comprenant:un générateur de vapeur (24) pour la génération de vapeur comprenant un chauffage (52) pour chauffer l'eau amenée au générateur de vapeur (24) pour générer la vapeur; etun gicleur (26) pour pulvériser la vapeur générée par le générateur de vapeur (24) dans une cuve (14, 16);caractérisée en ce que la machine à laver comprend en outre:un capteur de température (42) pour détecter la température à l'intérieur de la cuve (14, 16); etun contrôleur (80) pour contrôler le chauffage (52) en se basant sur la température à l'intérieur de la cuve (14, 16).
- Machine à laver de la revendication 1, dans laquelle le générateur de vapeur (24) comprend:un conteneur hermétique (50) auquel sont connectés respectivement un tube d'alimentation d'eau (32) pour alimenter l'eau et un tube d'évacuation de vapeur (34) pour évacuer la vapeur générée; etun capteur de niveau d'eau (54) monté dans le conteneur hermétique (50) pour détecter un niveau d'eau alimenté dans le conteneur hermétique (50) étape par étape.
- Machine à laver de la revendication 2, dans laquelle le capteur de niveau d'eau (54) comprend:une barre d'électrode commune (70);une pluralité de barres d'électrodes (72, 74) de différentes longueurs, détectant le niveau d'eau; etun organe support (76) pour monter la barre commune d'électrode (70) et la pluralité de barres d'électrodes (72, 74) détectant le niveau d'eau dans un état isolé.
- Machine à laver de la revendication 3, dans lequel les barres d'électrodes (72, 74) détectant le niveau d'eau comprennent:une première électrode (72) pour détecter un niveau d'eau le plus bas (L1) ; etune seconde électrode (74) pour détecter un niveau d'eau le plus élevé (L2).
- Machine à laver de la revendication 4, dans laquelle la première électrode (72) a une longueur pour détecter un niveau d'eau alimenté dans le conteneur hermétique (50) de sorte que le chauffage (52) peut être immergé dans l'eau.
- Machine à laver de la revendication 4, dans laquelle la seconde électrode (74) a une longueur pour détecter un niveau d'eau ayant un espace à une portion supérieure du conteneur hermétique (50) afin de générer la vapeur en chauffant l'eau par le chauffage (52).
- Machine à laver de la revendication 2, dans laquelle le chauffage (52) est disposé au fond du conteneur hermétique (50) pour chauffer l'eau alimentée dans le conteneur hermétique (50).
- Machine à laver de la revendication 2, dans laquelle le contrôleur (80) contrôle le chauffage (52) en se basant sur le niveau de l'eau alimentée dans le conteneur hermétique (50).
- Machine à laver de la revendication 2, comprenant en outre une vanne d'alimentation pour alimenter l'eau dans le générateur de vapeur (24), dans lequel le contrôleur (80) contrôle la vanne d'alimentation d'eau en se basant sur le niveau de l'eau alimentée dans le conteneur hermétique (50).
- Machine à laver de la revendication 1, dans laquelle le contrôleur (80) éteint le chauffage (52) quand la température à l'intérieur de la cuve (14, 16) atteint une température réglée.
- Machine à laver de la revendication 10, dans laquelle la température réglée est sélectionnée par un utilisateur.
- Machine à laver de la revendication 1, comprenant en outre un capteur de niveau d'eau (54) pour détecter un niveau d'eau alimenté pour le générateur de vapeur (24).
- Machine à laver de la revendication 12, dans laquelle le capteur de niveau d'eau (54) détecte le niveau d'eau étape par étape.
- Procédé de fonctionnement d'une machine à laver comprenant:une première étape d'alimentation de l'eau dans un générateur de vapeur (24);une seconde étape de détection si le niveau de l'eau alimenté dans le générateur de vapeur (24) a atteint un niveau réglé; etune troisième étape de mise en route d'un chauffage (52) générer ainsi la vapeur quand le niveau d'eau a atteint un niveau réglé dans la seconde étape;caractérisé en ce que le procédé de fonctionnement comprend en outre:une quatrième étape d'exécution d'une opération de lavage quand la valeur générée par le générateur de vapeur (24) a été alimentée dans une cuve (14, 16) et ainsi la température à l'intérieur de la cuve (14, 16) a atteint une température réglée dans la troisième étape.
- Procédé de la revendication 14, dans lequel le niveau réglé est un niveau le plus élevé (L2) de l'eau alimentée dans le générateur de vapeur (24).
- Procédé de la revendication 15, dans lequel une tension entre une barre d'électrode commune (70) et une seconde barre d'électrode (74) est appliquée dans un contrôleur (80) quand la seconde barre d'électrode (74) d'un capteur de niveau d'eau (54) est en contact avec l'eau dans la seconde étape.
- Procédé de la revendication 14, comprenant en outre une étape de coupure du chauffage (52) quand un niveau d'eau à l'intérieur du générateur de vapeur (24) est inférieur à un niveau d'eau le plus bas (L1).
- Procédé de la revendication 17, dans lequel le niveau d'eau le plus bas (L1) est un niveau d'eau auquel une première barre d'électrodes (72) d'un capteur niveau d'eau (54) est en contact avec l'eau.
- Procédé de la revendication 14, dans lequel la température réglée est la température à l'intérieur d'une cuve (14, 16) sélectionnée par un utilisateur.
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 EP1507031A1 (fr) | 2005-02-16 |
EP1507031B1 true 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) |
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- 2004-01-29 CN CNB2004100035399A patent/CN100387769C/zh not_active Expired - Lifetime
- 2004-01-30 DE DE602004022113T patent/DE602004022113D1/de not_active Expired - Lifetime
- 2004-01-30 EP EP04002018A patent/EP1507031B1/fr not_active Expired - Lifetime
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US7841219B2 (en) | 2006-08-15 | 2010-11-30 | Whirlpool Corporation | Fabric treating appliance utilizing steam |
US7886392B2 (en) | 2006-08-15 | 2011-02-15 | Whirlpool Corporation | Method of sanitizing a fabric load with steam in a fabric treatment appliance |
US7753009B2 (en) | 2006-10-19 | 2010-07-13 | Whirlpool Corporation | Washer with bio prevention cycle |
US8393183B2 (en) | 2007-05-07 | 2013-03-12 | Whirlpool Corporation | Fabric treatment appliance control panel and associated steam operations |
US7905119B2 (en) | 2007-08-31 | 2011-03-15 | Whirlpool Corporation | Fabric treatment appliance with steam generator having a variable thermal output |
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US8037565B2 (en) | 2007-08-31 | 2011-10-18 | Whirlpool Corporation | Method for detecting abnormality in a fabric treatment appliance having a steam generator |
US7690062B2 (en) | 2007-08-31 | 2010-04-06 | Whirlpool Corporation | Method for cleaning a steam generator |
US8555675B2 (en) | 2007-08-31 | 2013-10-15 | Whirlpool Corporation | Fabric treatment appliance with steam backflow device |
US8555676B2 (en) | 2007-08-31 | 2013-10-15 | Whirlpool Corporation | Fabric treatment appliance with steam backflow device |
DE102010016672B3 (de) * | 2010-04-28 | 2011-05-05 | Miele & Cie. Kg | Verfahren zum Betreiben einer Waschmaschine und Waschmaschine |
EP2383383A1 (fr) | 2010-04-28 | 2011-11-02 | Miele & Cie. KG | Procédé de fonctionnement d'un lave-linge et lave-linge |
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 |
Also Published As
Publication number | Publication date |
---|---|
CN100387769C (zh) | 2008-05-14 |
CN1580369A (zh) | 2005-02-16 |
KR100500887B1 (ko) | 2005-07-14 |
DE602004022113D1 (de) | 2009-09-03 |
EP1507031A1 (fr) | 2005-02-16 |
US20050034250A1 (en) | 2005-02-17 |
KR20050017489A (ko) | 2005-02-22 |
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