EP1507031A1 - Heating apparatus of washing machine and control method thereof - Google Patents
Heating apparatus of washing machine and control method thereof Download PDFInfo
- 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.)
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Links
- 238000005406 washing Methods 0.000 title claims abstract description 58
- 238000010438 heat treatment Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 129
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims abstract description 8
- 239000008236 heating water Substances 0.000 claims description 4
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 239000003599 detergent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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.
- 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.
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- 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)
Abstract
Description
- 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.
- Figure 1 is a sectional view of a washing machine in accordance with the conventional art.
- The drum washing machine according to the conventional art comprises: a cabinet 102 for forming an appearance; a
tub 104 arranged in the cabinet 102 for storing washing water; adrum 106 rotatably arranged in thetub 104 for washing and dehydrating laundry; and adriving motor 110 connected to thedrum 106 by adriving shaft 108 for rotating thedrum 106. - The
tub 104 is shock-absorbingly supported in the cabinet 102 bydampers heater 130 for heating washing water stored in thetub 104 is installed at a lower portion of thetub 104. - A lower portion of the
tub 104 has to be provided with enough space for mounting theheater 130, and water level more than a certain height has to be maintained in thetub 104 so that theheater 130 can be sufficiently soaked by washing water. - Operation of the conventional drum washing machine will be explained. First, once the washing machine is operated, washing water is supplied into the
tub 104. Then, if the water level of thetub 104 reaches a set level, theheater 130 is operated thus to heat the washing water. At the same time, a drivingmotor 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, theheater 130 becomes off. - However, in the conventional washing machine, a space for accommodating the
heater 130 which heats laundry has to be provided at the lower portion of thetub 104, so that an entire size of the washing machine becomes large. Besides, since washing water has to be also provided at the space for accommodating theheater 130, waste of washing water becomes great. - Furthermore, 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. - Therefore, 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.
- To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided 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.
- To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is also provided 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.
- The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
- In the drawings:
- Figure 1 is a sectional view of a washing machine in accordance with the conventional art;
- Figure 2 is a perspective view showing an opened front surface of a washing machine according to the present invention;
- Figure 3 is a partially-cut perspective view of a steam generator of the washing machine according to the present invention;
- Figure 4 is a perspective view of a water level sensor according to the present invention;
- Figure 5 is a block diagram showing a heating method of a heating apparatus of the washing machine according to the present invention; and
- Figure 6 is a flow chart showing the heating method of the washing machine according to the present invention.
-
- Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
- Figure 2 is a perspective view showing an opened front surface of a washing machine according to the present invention.
- The washing machine according to one embodiment of the present invention comprises: a
cabinet 10 for forming an appearance thereof; anouter tub 14 shock-absorbingly supported by adamper 12 in thecabinet 10 for storing washing water; an inner tub (drum) 16 rotatably arranged in theouter tub 14 for washing and dehydrating laundry; and a heating unit arranged at an upper side of thecabinet 10 for spraying steam into laundry received into theinner tub 16. - A
detergent box 20 connected to awater supply tube 18 is installed at an upper side of theouter tub 14 thus to supply detergent with washing water into theouter tub 14. - The heating unit is composed of a
steam generator 24 arranged at an upper side of thecabinet 10 for generating steam, and aspray nozzle 26 for spraying steam generated from thesteam generator 24 into theinner tub 16. Also, acirculation pump 28 for pumping water exhausted from theouter tub 16 and thereby re-supplying into theinner tub 16 through thespray nozzle 26 is installed at a lower side of thecabinet 10. - Herein, a
diverge unit 30 for preventing circulation water circulated by a pumping power of thecirculation pump 28 from being mixed with steam generated from thesteam generator 24 is installed at thespray nozzle 26. - The
steam generator 24 is connected to awater supply tube 32 thus to receive water from outside, and connected to thediverge unit 30 by asteam supply tube 34. Herein, at one side of thewater supply tube 32, awater supply valve 40 for opening and closing thewater supply tube 32 is mounted. Thecirculation pump 28 is connected to anexhaustion pipe 36 for exhausting washing water stored in theouter tub 14, and is connected to thediverge unit 30 by acirculation tube 38. - Also, a
temperature sensor 42 for detecting temperature inside theinner tub 16 at the time of spraying steam into theinner tub 16 through thespray nozzle 26 is installed in theinner 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: ahermetic container 50 to which awater supply tube 32 and asteam exhaustion tube 34 are respectively connected; aheater 52 arranged at a bottom of thehermetic container 50 for heating water supplied into thehermetic container 50; and awater level sensor 54 mounted in the hermetic container for detecting a level of water supplied into thehermetic container 50 step by step. - An
upper container 56 and alower container 58 of thehermetic container 50 are hermetically mounted with a certain space therein. Awater supply port 60 connected to thewater supply tube 32 is formed at one side of theupper container 56, and asteam exhaustion port 62 connected to thesteam supply tube 34 for exhausting steam generated in thehermetic container 50 is formed at thelower container 58. - As shown in Figure 4, the
water level sensor 54 comprises: onecommon electrode bar 70; a plurality of water level detectingelectrode bars member 76 hermetically mounted at thehermetic container 50 and for mounting thecommon electrode bar 70 and the plurality of water level detectingelectrode bars - Among the
common electrode bar 70 and the plurality of water level detectingelectrode bars common electrode bar 70 is the longest. Also, the water level detectingelectrode bars common electrode bar 70 and one of the water level detectingelectrode bars 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 detectingelectrode bars - The water level detecting
electrode bars first electrode 72 for detecting a lowest water level L1 supplied into thehermetic container 50, and asecond electrode 74 for detecting a highest water level L2. - The water level detecting electrode bars are not limited to the
first electrode 72 and thesecond electrode 74, but can be constituted as plural electrodes in order to detect a middle water level. - Herein, the
first electrode 72 has a length for detecting the lowest water level L1 that theheater 52 can be immersed in water. Also, thesecond electrode 74 has a certain length for maintaining a minimum space inside thehermetic 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 theupper container 56. Thecommon electrode bar 70 and the plurality water level detectingelectrode bars member 76 with an insulated state. - Operation of the
water level sensor 54 will be explained. - When water is supplied into the
hermetic container 50 under a state that a direct current voltage is applied between thecommon electrode bar 70 and the first andsecond electrode bars common electrode bar 70. Then, when thefirst electrode bar 72 is in contact with water as water is gradually supplied, thecommon electrode bar 70 and thefirst electrode bar 72 are electrically connected to each other thus to generate a low voltage and thereby to detect the lowest water level L1. Also, when thesecond electrode bar 74 is in contact with water as water is further supplied into thehermetic container 50, thecommon electrode bar 70 and thesecond electrode bar 74 are electrically connected to each other thus to generate a high voltage and thereby to detect the highest water level L2. - Figure 5 is a block diagram showing a heating method of a heating apparatus of the washing machine according to the present invention. As shown, the heating apparatus comprises a
temperature sensor 42 installed at one side of the inner tub for detecting temperature of the inner tub, awater level sensor 54 installed in thesteam generator 24 for detecting a level of water supplied into thesteam generator 24 step by step, and acontroller 80 for controlling an operation of thewater supply valve 40 and theheater 52 according to a signal applied from thetemperature sensor 42 and thewater 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.
- Operation of the heating apparatus of the washing machine according to the present invention will be explained as follows.
- Figure 6 is a flow chart showing the heating method of the washing machine according to the present invention.
- First, laundry is put into the
inner tub 16 and then a driving signal of the washing machine is applied, thereby supplying washing water into theouter tub 14. Then, when a laundry heating mode is inputted by a user, thecontroller 80 switches-on the water supply valve (S10). - According to this, water is supplied into the
steam generator 24 through the water supply tube 32 (S20). - Then, it is judged whether 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 thehermetic container 50 of thesteam generator 24 and thereby thesecond electrode bar 74 of thewater level sensor 54 is in contact with water, thecommon electrode 70 and thesecond electrode bar 74 are electrically connected to each other by water thus to generate a voltage. The generated voltage is detected by thecontroller 80 and thereby a water level is judged. - In said step, if it is judged that the water level has reached the first setting level T1, water supply is stopped and the
heater 52 is turned on (S40 and S50). That is, thecontroller 80 switches-off thewater supply valve 40 thus to stop water supply and applies a power source into theheater 52. - According to this, the water which has been supplied into the
hermetic container 50 is heated by theheater 52 thus to generate steam, and the steam generated in thehermetic container 50 is supplied into theinner tub 16 through thesteam supply tube 34 thus to heat the laundry. - Then, it is judged whether 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 thehermetic container 50 is lower than the lowest water level that thefirst electrode bar 72 is not in contact with water. - In said step, if the water level is judged to be lower than the second setting level T2, 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, thecontroller 80 compares a set temperature selected by the user with a temperature inside theinner tub 16 applied from thetemperature sensor 42. - In said step, if the temperature inside the
inner tub 16 is judged to be more than the set temperature, a washing operation is performed. On the contrary, if the internal temperature of theinner tub 16 is judged to be lower than the set temperature, water is supplied into thehermetic container 50 and the above steps are repeated thus to spray steam into theinner tub 16. - In the heating apparatus of the washing machine according to the present invention, 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.
- Besides, 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.
- As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (12)
- A heating apparatus of a washing machine comprising:a steam generator for generating steam; anda spray nozzle for spraying steam generated from the steam generator into a tub,
- The apparatus of claim 1, wherein 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; anda water level sensor mounted in the hermetic container for detecting a level of water supplied into the hermetic container step by step.
- The apparatus of claim 2, wherein the water level sensor comprises:one common electrode bar;a plurality of water level detecting electrode bars of different lengths; anda supporting member for mounting the common electrode bar and the plurality of water level detecting electrode bars with an insulated state.
- The apparatus of claim 3, wherein the water level detecting electrode bars comprises:a first electrode for detecting a lowest water level; anda second electrode for detecting a highest water level.
- The apparatus of claim 4, wherein the first electrode bar has a length for detecting a level of water supplied into the hermetic container that a heater can be immersed in water.
- The apparatus of claim 4, wherein the second electrode has a length for detecting a water level having a space at an upper portion of the hermetic container in order to generate steam by heating water by the heater.
- 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 turning on a heater and thereby generating steam when the water level has reached a set level in the second step; anda fourth step of performing a washing operation when steam generated from the steam generator has been supplied into a tub and thereby temperature inside the tub has reached a set temperature in the third step.
- The method of claim 7, wherein the set level is a highest level of water supplied into the steam generator.
- The method of claim 8, wherein a voltage between a common electrode bar and a second electrode bar is applied into a controller when the second electrode bar of a water level sensor is in contact with water in the second step.
- The method of claim 7, further comprising a step of turning off the heater when a water level inside the steam generator is lower than a lowest water level.
- The method of claim 10, wherein the lowest water level is a water level that a first electrode bar of a water level is in contact with water.
- The method of claim 7, wherein the set temperature is temperature inside a tub selected by a user.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2003-0056267A KR100500887B1 (en) | 2003-08-13 | 2003-08-13 | Apparatus for generating steam in Drum-type washing machine and method of the same |
KR2003056267 | 2003-08-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1507031A1 true EP1507031A1 (en) | 2005-02-16 |
EP1507031B1 EP1507031B1 (en) | 2009-07-22 |
Family
ID=33563047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04002018A Expired - Lifetime EP1507031B1 (en) | 2003-08-13 | 2004-01-30 | Heating apparatus of washing machine and control method thereof |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050034250A1 (en) |
EP (1) | EP1507031B1 (en) |
KR (1) | KR100500887B1 (en) |
CN (1) | CN100387769C (en) |
DE (1) | DE602004022113D1 (en) |
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EP1696066A2 (en) * | 2005-02-25 | 2006-08-30 | LG Electronics Inc. | Washing machine and washing method |
WO2006098572A1 (en) * | 2005-03-17 | 2006-09-21 | Lg Electronics Inc. | Water level sensor of steam generating apparatus for washing or drying machine and steam generating apparatus with the same |
WO2006101312A1 (en) * | 2005-03-25 | 2006-09-28 | Lg Electronics Inc. | Washing device and method controlling the same |
WO2006104310A1 (en) | 2005-03-29 | 2006-10-05 | Lg Electronics Inc. | Steam washing method for washing machine and washing machine with the same |
WO2006126779A1 (en) * | 2005-05-23 | 2006-11-30 | Lg Electronics Inc. | Water level sensor for steam generator |
WO2006129912A1 (en) * | 2005-05-31 | 2006-12-07 | Lg Electronics Inc. | A washing machine generating and using the steam |
WO2006129916A1 (en) | 2005-05-31 | 2006-12-07 | Lg Electronics Inc. | Laundry machine |
WO2006129913A1 (en) | 2005-05-31 | 2006-12-07 | Lg Electronics Inc. | A method for controlling a washing machine |
WO2006129915A1 (en) * | 2005-05-31 | 2006-12-07 | Lg Electronics Inc. | Laundry machine |
DE102007012135B3 (en) * | 2007-03-12 | 2008-06-19 | Miele & Cie. Kg | Method for operating an electrical heater of a washing machine or washing drier, involves electrical power supplied with value and temperature of heater or heat conductor detected over pre-determined time |
WO2008075849A2 (en) * | 2006-12-19 | 2008-06-26 | Lg Electronics Inc. | Laundry machine |
FR2920161A1 (en) * | 2007-08-24 | 2009-02-27 | Brandt Ind Sas | METHOD OF CONTROLLING FLOW OF WATER DURING A STEAM GENERATION PHASE OF A DRYING MACHINE AND A DRYING MACHINE |
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 |
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Also Published As
Publication number | Publication date |
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CN100387769C (en) | 2008-05-14 |
CN1580369A (en) | 2005-02-16 |
KR100500887B1 (en) | 2005-07-14 |
DE602004022113D1 (en) | 2009-09-03 |
EP1507031B1 (en) | 2009-07-22 |
US20050034250A1 (en) | 2005-02-17 |
KR20050017489A (en) | 2005-02-22 |
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