US20110072861A1 - Washing Machine and Steam Washing Method Thereof - Google Patents
Washing Machine and Steam Washing Method Thereof Download PDFInfo
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- US20110072861A1 US20110072861A1 US12/961,919 US96191910A US2011072861A1 US 20110072861 A1 US20110072861 A1 US 20110072861A1 US 96191910 A US96191910 A US 96191910A US 2011072861 A1 US2011072861 A1 US 2011072861A1
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- Prior art keywords
- steam
- washing
- wash water
- water supply
- laundry
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- 238000005406 washing Methods 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000001514 detection method Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000001954 sterilising effect Effects 0.000 abstract description 10
- 241000894006 Bacteria Species 0.000 abstract description 9
- 241000233866 Fungi Species 0.000 abstract description 7
- 239000003599 detergent Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002979 fabric softener Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- 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
-
- 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
-
- 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
- D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
- D06F35/005—Methods for washing, rinsing or spin-drying
Definitions
- the present invention relates to a washing machine, and more particularly to a washing machine and steam washing method thereof that washes laundry with steam generated by heating wash water with a wash heater.
- a washing machine includes a cabinet, a tub adapted to contain wash water, a drum disposed inside the tub, a drive motor adapted to drive the drum, a water supply valve connected to the tub to supply wash water to the tub, and a detergent container connected to the water supply valve and containing detergent. Additionally, the washing machine includes a drain unit extending from the tub to the outside of the cabinet, a steam generator disposed between the water supply valve and the detergent container, and a steam heater provided to the steam generator to generate steam by heating wash water.
- the washing machine performs steam washing as follows.
- water is supplied into the steam generator and heated by the steam heater provided to the steam generator to supply steam into the drum where laundry has been received.
- the drive motor rotates the drum in the forward and reverse directions to agitate the laundry inside the drum for steam washing.
- the steam generated by means of the steam heater sterilizes bacteria and fungi in the laundry.
- a wash heater can be operated to heat wash water inside the tub or the steam heater can be operated to supply steam into the tub.
- the washing method of the conventional washing machine entails substantial power consumption since the steam heater is continuously operated from start to end of the washing operation to supply steam to the laundry. Moreover, in the conventional washing machine, since washing and rinsing cycles are carried out after the steam washing, bacteria or fungi can be attached to the laundry during the washing and rinsing cycles, thereby deteriorating sterilizing effects of the steam washing.
- the present invention is conceived to solve the problems of the conventional techniques as described above, and an aspect of the present invention is to provide a washing machine and steam washing method thereof that supply steam to laundry to perform steam washing after completion of a spin-dry cycle.
- a steam washing method of a washing machine including: performing primary steam washing by supplying steam to laundry; performing a washing cycle by supplying wash water to the laundry; performing a rinsing cycle; performing a spin-dry cycle to remove the wash water from the laundry; and performing secondary steam washing by supplying steam to the laundry.
- the performing of the primary and secondary steam washing comprises supplying wash water for steam, and generating the steam while alternately rotating a drum in forward and reverse directions by operating a wash heater and a motor.
- the wash water for steam is supplied through an assistant water supply tube so as to prevent the wash water for steam from being absorbed by the laundry.
- a steam washing method of a washing machine including: performing primary steam washing by supplying steam to laundry; performing a washing cycle by supplying wash water to the laundry; performing an initial rinsing cycle; performing secondary steam washing by supplying steam to the laundry; performing a final rinsing cycle; and performing a spin-dry cycle to remove the wash water from the laundry.
- the performing of the primary and secondary steam washing comprises supplying wash water for steam, and generating the steam while driving a drum by operating a wash heater and a motor.
- a washing machine including: a water supply tube supplying wash water to a tub; a heater compartment to contain the wash water; a wash heater heating the wash water contained in the heater compartment to generate steam; and a level detection sensor detecting a level of the wash water contained in the heater compartment.
- the washing machine may further include a gasket disposed at one side of the tub; a drum disposed inside the tub to receive laundry; and an assistant water supply tube passing through the gasket to prevent wash water for steam from being supplied to the laundry.
- the assistant water supply tube communicates with the water supply tube.
- the washing machine further includes a water supply valve between the assistant water supply tube and the water supply tube.
- the heater compartment extends outwardly from the tub.
- FIG. 1 is a cross-sectional view of a washing machine according to one embodiment of the present invention
- FIG. 2 is a block diagram of the washing machine according to the embodiment of the present invention.
- FIG. 3 is a flowchart of a steam washing method of a washing machine according to one embodiment of the present invention.
- FIG. 4 is a flowchart of a steam washing method of a washing machine according to another embodiment of the present invention.
- FIG. 1 is a cross-sectional view of a washing machine according to one embodiment of the present invention
- FIG. 2 is a block diagram of the washing machine according to the embodiment of the present invention.
- the washing machine includes a cabinet 100 constituting the appearance of the washing machine, a tub 105 disposed inside the cabinet 100 to contain wash water, and a drum 110 rotatably disposed inside the tub 105 .
- the cabinet 100 has a door 115 mounted to the front side thereof to open or close an opening of the cabinet 100 through which laundry is put into the drum, and the tub 105 is provided on upper and lower sides thereof with a support spring 120 and a damper 125 to hold the tub 105 in a buffering manner.
- the upper side of the tub 105 is provided with a detergent supply part 130 for supplying detergent into the tub and a water supply tube 140 which has a water supply valve 135 and supplies wash water into the tub 105 .
- a gasket 142 is provided with an assistant water supply tube 143 .
- the assistant water supply tube 143 passes through the gasket 142 interposed between the cabinet 100 and the tub 105 to supply wash water for steam to a preset steam level, and is connected to the water supply valve 135 to supply the wash water for steam into a heater compartment 160 so as to prevent the wash water for steam from being absorbed by the laundry.
- the tub 105 is provided at the rear side with a drive motor 145 adapted to drive the drum 110 , and on the bottom with a drain path 150 and a drain pump 155 through which wash water is discharged to the outside.
- the heater compartment 160 is defined at a lower part of the tub 105 to contain the wash water and is provided with a wash heater 165 therein to heat the wash water when generating steam.
- a plurality of lifts 170 are provided on the inner surface of the drum 110 .
- the washing machine includes a controller 200 to control a steam washing process.
- the controller 200 is electrically connected to the water supply valve 135 for supplying wash water into the tub 105 , to the drive motor 145 for alternately rotating the drum in the forward and reverse directions to agitate laundry received in the drum, to the drain pump 155 for discharging the wash water to the outside of the cabinet 100 , and to the wash heater 165 for heating wash water for steam.
- the washing machine includes a key input unit 210 for sending a key input signal to the controller 200 and a level detection sensor 220 for detecting a level of wash water inside the tub 105 when the wash water is supplied into the tub 105 .
- the controller 200 closes the water supply valve 135 and operates the drive motor 145 to drive the drum 110 , thereby agitating the laundry in the drum 110 .
- the drum 110 may be alternately rotated in the forward and reverse directions to enhance efficiency of the steam washing course.
- the wash heater 165 is operated to heat the wash water to a preset temperature and generate steam in S 109 ⁇ S 112 , and primary steam washing is performed in S 115 .
- wash water is intermittently supplied through the water supply valve 135 to efficiently generate steam while the wash heater 165 heats the wash water to generate steam.
- Hot steam generated by means of the wash heater 165 is used to sterilize bacteria and fungi in laundry. Further, since a window of the door 115 is fogged by steam generated during the steam washing course, it is possible to visually confirm the steam washing course.
- the controller 200 After completion of the primary steam washing in S 115 , the controller 200 opens the water supply valve 135 and starts wash water supply into the tub 105 along with detergent contained in the detergent supply unit 130 in S 121 .
- the controller 200 closes the water supply valve 135 to stop the wash water supply in S 124 .
- a washing cycle is performed by heating the wash water to a preset temperature with the wash heater 165 while agitating the laundry in the drum 110 by operating the drive motor 145 to alternately rotate the drum 110 in the forward and reverse directions.
- the controller 200 stops the wash heater 165 and the drive motor 145 in S 133 .
- a rinsing cycle is performed to remove detergent remnants in S 136 .
- the rinsing cycle is performed once or more by supplying wash water into the tub 105 through the water supply valve 135 .
- the drive motor 145 is operated to alternately rotate the drum 110 in the forward and reverse directions in response to a control signal from the controller 200 , thereby agitating the laundry in the drum 110 .
- a spin-dry cycle is performed by operating the drive motor 145 to rotate the drum 110 in S 139 , followed by secondary steam washing.
- the water supply valve 135 is opened and steam water supply is started to supply wash water for steam into the tub 105 up to a preset steam level in S 142 .
- the wash water for steam is supplied through the assistant water supply tube 143 so as to prevent the wash water removed from the laundry by a spin-dry cycle from being absorbed by the laundry.
- the controller 200 closes the water supply valve 135 and operates the drive motor 145 to rotate the drum 110 , thereby agitating the laundry received in the drum 110 .
- the drum 110 may be alternately rotated in the forward and reverse directions.
- the wash heater 165 is operated to heat the wash water to a preset temperature and generate steam in S 148 ⁇ S 151 , and the secondary steam washing is performed in S 154 .
- wash water is intermittently supplied through the water supply valve 135 or the assistant water supply valve 143 to maintain the steam level and efficiently generate steam while the wash heater 165 heats the wash water to generate the steam.
- steam washing is performed again after completion of the spin-dry cycle, thereby improving sterilization effect of the steam washing course by sterilizing bacteria attached to the laundry during the washing and rinsing cycles. Further, in the steam washing method of this embodiment, steam is generated by means of the wash heater without using a separate steam heater, so that steam is not generated during the washing cycle, thereby reducing power consumption.
- FIG. 4 is a flowchart of a steam washing method of a washing machine according to another embodiment of the present invention.
- the controller 200 when a steam washing course is selected on the key input unit 210 with laundry received in the drum 110 of the washing machine in S 200 , the controller 200 outputs a control signal to open the water supply valve 135 . Then, wash water for steam is supplied into the tub 105 until it reaches a preset steam level for performing the steam washing course, in S 203 .
- the controller 200 closes the water supply valve 135 and operates the drive motor 145 to drive the drum 110 , thereby agitating the laundry in the drum 110 .
- the drum 110 may be alternately rotated in the forward and reverse directions to enhance efficiency of washing operation.
- the wash heater 165 is operated to heat the wash water to a preset temperature and generate steam in S 209 ⁇ S 212 , and primary steam washing is performed in S 215 .
- wash water is intermittently supplied through the water supply valve 135 to efficiently generate steam while the wash heater 165 heats the wash water to generate the steam.
- the controller 200 After completion of the primary steam washing in S 215 , the controller 200 opens the water supply valve 135 and starts wash water supply into the tub 105 along with detergent contained in the detergent supply part 130 in S 221 .
- the controller 200 closes the water supply valve 135 to stop the wash water supply in S 224 .
- a washing cycle is performed by heating the wash water to a preset temperature with the wash heater 165 while agitating the laundry in the drum 110 by operating the drive motor 145 to alternately rotate the drum 110 in the forward and reverse directions.
- the controller 200 stops the wash heater 165 and the drive motor 145 in S 233 .
- a rinsing cycle is performed in S 236 .
- the rinsing cycle is performed by supplying wash water into the tub 105 through the water supply valve 135 and then alternately rotating the drum 110 in the forward and reverse directions to agitate the laundry in the drum 110 by the drive motor 145 in response to a control signal from the controller 200 .
- the rinsing cycle is performed once or more, and the last rinsing cycle will be referred to as a final rinsing cycle.
- secondary steam washing is performed before the final rinsing cycle, that is, between the rinsing cycles. After completion of the secondary steam washing, the final rinsing cycle is performed, thereby completing the rinsing cycle.
- the water supply valve 135 is opened and steam water supply is started to supply wash water for steam into the tub 105 up to a preset steam level in S 239 .
- the controller 200 closes the water supply valve 135 and operates the drive motor 145 to rotate the drum 110 , thereby agitating the laundry in the drum 110 .
- the drum 110 may be alternately rotated in the forward and reverse directions.
- the wash heater 165 is operated to heat wash water to a preset temperature and generate steam in S 245 ⁇ S 248 , and the secondary steam washing is performed in S 251 .
- wash water is intermittently supplied through the water supply valve 135 or the assistant water supply valve 135 to maintain the steam level and efficiently generate steam while the wash heater 165 heats the wash water to generate the steam.
- the final rinsing cycle is performed in S 257 . Since the final rinsing cycle is performed after steam washing, it is possible to prevent effects of fabric softeners and the like used in the rinsing cycle from being reduced due to the steam washing.
- a spin-dry cycle is performed in S 260 , thereby completing the washing process.
- steam washing is performed again between the washing cycle and the final rinsing cycle, improving sterilization effect of the steam washing operation by sterilizing bacteria attached to laundry during the washing and rinsing cycles. Further, in the steam washing method of this embodiment, steam is generated by means of a wash heater without using a separate steam heater so that steam is not generated during the washing cycle, thereby reducing power consumption.
- the washing machine and steam washing method thereof according to the present invention have various advantageous effects.
- hot steam is generated using a wash heater to perform steam sterilization of bacteria and fungi in laundry.
- the washing machine can perform a washing cycle without generating steam, thereby reducing power consumption.
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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)
Abstract
A washing machine and steam washing method thereof are disclosed. The method includes performing primary steam washing by supplying steam to laundry, performing a washing cycle by supplying wash water to the laundry, performing a rinsing cycle, performing a spin-dry cycle to remove the wash water from the laundry, and performing secondary steam washing by supplying steam to the laundry. The washing machine has improved sterilizing effects by sterilizing bacteria and fungi with hot steam.
Description
- This application is a divisional of U.S. application Ser. No. 12/126,339 filed May 23, 2008, claiming priority to Korean Patent Application No. 10-2007-0051062 filed May 25, 2007; and Korean Patent Application No. 10-2007-0051063 filed May 25, 2007, the contents of which is hereby incorporated by reference in its entirety.
- 1. Field of the Invention
- The present invention relates to a washing machine, and more particularly to a washing machine and steam washing method thereof that washes laundry with steam generated by heating wash water with a wash heater.
- 2. Description of the Related Art
- Generally, a washing machine includes a cabinet, a tub adapted to contain wash water, a drum disposed inside the tub, a drive motor adapted to drive the drum, a water supply valve connected to the tub to supply wash water to the tub, and a detergent container connected to the water supply valve and containing detergent. Additionally, the washing machine includes a drain unit extending from the tub to the outside of the cabinet, a steam generator disposed between the water supply valve and the detergent container, and a steam heater provided to the steam generator to generate steam by heating wash water.
- The washing machine performs steam washing as follows.
- First, water is supplied into the steam generator and heated by the steam heater provided to the steam generator to supply steam into the drum where laundry has been received. While steam is generated by the steam heater, the drive motor rotates the drum in the forward and reverse directions to agitate the laundry inside the drum for steam washing. During the steam washing, the steam generated by means of the steam heater sterilizes bacteria and fungi in the laundry. During a washing cycle after completion of the steam washing operation, a wash heater can be operated to heat wash water inside the tub or the steam heater can be operated to supply steam into the tub.
- However, the washing method of the conventional washing machine entails substantial power consumption since the steam heater is continuously operated from start to end of the washing operation to supply steam to the laundry. Moreover, in the conventional washing machine, since washing and rinsing cycles are carried out after the steam washing, bacteria or fungi can be attached to the laundry during the washing and rinsing cycles, thereby deteriorating sterilizing effects of the steam washing.
- The present invention is conceived to solve the problems of the conventional techniques as described above, and an aspect of the present invention is to provide a washing machine and steam washing method thereof that supply steam to laundry to perform steam washing after completion of a spin-dry cycle.
- In accordance with one aspect of the present invention, there is provided a steam washing method of a washing machine including: performing primary steam washing by supplying steam to laundry; performing a washing cycle by supplying wash water to the laundry; performing a rinsing cycle; performing a spin-dry cycle to remove the wash water from the laundry; and performing secondary steam washing by supplying steam to the laundry. Preferably, the performing of the primary and secondary steam washing comprises supplying wash water for steam, and generating the steam while alternately rotating a drum in forward and reverse directions by operating a wash heater and a motor. Preferably, when supplying the wash water for steam, the wash water for steam is supplied through an assistant water supply tube so as to prevent the wash water for steam from being absorbed by the laundry.
- In accordance with another aspect of the present invention, there is provided a steam washing method of a washing machine including: performing primary steam washing by supplying steam to laundry; performing a washing cycle by supplying wash water to the laundry; performing an initial rinsing cycle; performing secondary steam washing by supplying steam to the laundry; performing a final rinsing cycle; and performing a spin-dry cycle to remove the wash water from the laundry. Preferably, the performing of the primary and secondary steam washing comprises supplying wash water for steam, and generating the steam while driving a drum by operating a wash heater and a motor.
- In accordance with a further aspect of the present invention, there is provided a washing machine including: a water supply tube supplying wash water to a tub; a heater compartment to contain the wash water; a wash heater heating the wash water contained in the heater compartment to generate steam; and a level detection sensor detecting a level of the wash water contained in the heater compartment. The washing machine may further include a gasket disposed at one side of the tub; a drum disposed inside the tub to receive laundry; and an assistant water supply tube passing through the gasket to prevent wash water for steam from being supplied to the laundry. Preferably, the assistant water supply tube communicates with the water supply tube. Preferably, the washing machine further includes a water supply valve between the assistant water supply tube and the water supply tube. Preferably, the heater compartment extends outwardly from the tub.
- The above and other objects, features and advantages of the present invention will become apparent from the following description of exemplary embodiments given in conjunction with the accompanying drawings, in which:
-
FIG. 1 is a cross-sectional view of a washing machine according to one embodiment of the present invention; -
FIG. 2 is a block diagram of the washing machine according to the embodiment of the present invention; -
FIG. 3 is a flowchart of a steam washing method of a washing machine according to one embodiment of the present invention; and -
FIG. 4 is a flowchart of a steam washing method of a washing machine according to another embodiment of the present invention. - Exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Herein, terms should be defined in consideration of functions of components of the present invention and thus can be changed according to the custom or intention of users or operators. Therefore, definition of such terms should be determined according to overall disclosures set forth herein.
-
FIG. 1 is a cross-sectional view of a washing machine according to one embodiment of the present invention, andFIG. 2 is a block diagram of the washing machine according to the embodiment of the present invention. - Referring to
FIGS. 1 and 2 , the washing machine includes acabinet 100 constituting the appearance of the washing machine, atub 105 disposed inside thecabinet 100 to contain wash water, and adrum 110 rotatably disposed inside thetub 105. - The
cabinet 100 has adoor 115 mounted to the front side thereof to open or close an opening of thecabinet 100 through which laundry is put into the drum, and thetub 105 is provided on upper and lower sides thereof with asupport spring 120 and adamper 125 to hold thetub 105 in a buffering manner. The upper side of thetub 105 is provided with adetergent supply part 130 for supplying detergent into the tub and awater supply tube 140 which has awater supply valve 135 and supplies wash water into thetub 105. - A gasket 142 is provided with an assistant water supply tube 143. The assistant water supply tube 143 passes through the gasket 142 interposed between the
cabinet 100 and thetub 105 to supply wash water for steam to a preset steam level, and is connected to thewater supply valve 135 to supply the wash water for steam into aheater compartment 160 so as to prevent the wash water for steam from being absorbed by the laundry. - The
tub 105 is provided at the rear side with adrive motor 145 adapted to drive thedrum 110, and on the bottom with adrain path 150 and adrain pump 155 through which wash water is discharged to the outside. Theheater compartment 160 is defined at a lower part of thetub 105 to contain the wash water and is provided with awash heater 165 therein to heat the wash water when generating steam. A plurality oflifts 170 are provided on the inner surface of thedrum 110. - The washing machine includes a
controller 200 to control a steam washing process. For control of the washing machine, thecontroller 200 is electrically connected to thewater supply valve 135 for supplying wash water into thetub 105, to thedrive motor 145 for alternately rotating the drum in the forward and reverse directions to agitate laundry received in the drum, to thedrain pump 155 for discharging the wash water to the outside of thecabinet 100, and to thewash heater 165 for heating wash water for steam. - Further, the washing machine includes a
key input unit 210 for sending a key input signal to thecontroller 200 and alevel detection sensor 220 for detecting a level of wash water inside thetub 105 when the wash water is supplied into thetub 105. - Hereinafter, a steam washing method of the washing machine according to one embodiment of the present invention will be described with reference to
FIG. 3 . - First, in S100, when a steam washing course is selected on the
key input unit 210 with laundry put into thedrum 110 of the washing machine, thecontroller 200 outputs a control signal to open thewater supply valve 135. Then, wash water for steam is supplied into thetub 105 until it reaches a preset steam level for performing the steam washing course, in S103. - When the
level detection sensor 220 detects that wash water for steam reaches the preset steam level inside theheater compartment 160 at the lower part of thetub 105 in S106, thecontroller 200 closes thewater supply valve 135 and operates thedrive motor 145 to drive thedrum 110, thereby agitating the laundry in thedrum 110. Here, thedrum 110 may be alternately rotated in the forward and reverse directions to enhance efficiency of the steam washing course. - Then, the
wash heater 165 is operated to heat the wash water to a preset temperature and generate steam in S109˜S112, and primary steam washing is performed in S115. In the steam washing course, wash water is intermittently supplied through thewater supply valve 135 to efficiently generate steam while thewash heater 165 heats the wash water to generate steam. Hot steam generated by means of thewash heater 165 is used to sterilize bacteria and fungi in laundry. Further, since a window of thedoor 115 is fogged by steam generated during the steam washing course, it is possible to visually confirm the steam washing course. - After completion of the primary steam washing in S115, the
controller 200 opens thewater supply valve 135 and starts wash water supply into thetub 105 along with detergent contained in thedetergent supply unit 130 in S121. When thelevel detection sensor 220 detects that wash water reaches a preset water level, thecontroller 200 closes thewater supply valve 135 to stop the wash water supply in S124. - Next, in S127 and S130, a washing cycle is performed by heating the wash water to a preset temperature with the
wash heater 165 while agitating the laundry in thedrum 110 by operating thedrive motor 145 to alternately rotate thedrum 110 in the forward and reverse directions. After completion of the washing cycle, thecontroller 200 stops thewash heater 165 and thedrive motor 145 in S133. - Then, a rinsing cycle is performed to remove detergent remnants in S136. The rinsing cycle is performed once or more by supplying wash water into the
tub 105 through thewater supply valve 135. Here, thedrive motor 145 is operated to alternately rotate thedrum 110 in the forward and reverse directions in response to a control signal from thecontroller 200, thereby agitating the laundry in thedrum 110. - After completion of the rinsing cycle, a spin-dry cycle is performed by operating the
drive motor 145 to rotate thedrum 110 in S139, followed by secondary steam washing. - For the secondary steam washing, the
water supply valve 135 is opened and steam water supply is started to supply wash water for steam into thetub 105 up to a preset steam level in S142. At this time, the wash water for steam is supplied through the assistant water supply tube 143 so as to prevent the wash water removed from the laundry by a spin-dry cycle from being absorbed by the laundry. When thelevel detection sensor 220 detects that the wash water reaches the preset steam level in S145, thecontroller 200 closes thewater supply valve 135 and operates thedrive motor 145 to rotate thedrum 110, thereby agitating the laundry received in thedrum 110. Here, thedrum 110 may be alternately rotated in the forward and reverse directions. - Then, in the steam washing method of the embodiment, the
wash heater 165 is operated to heat the wash water to a preset temperature and generate steam in S148˜S151, and the secondary steam washing is performed in S154. During the secondary steam washing, wash water is intermittently supplied through thewater supply valve 135 or the assistant water supply valve 143 to maintain the steam level and efficiently generate steam while thewash heater 165 heats the wash water to generate the steam. After completion of the secondary steam washing of S157, the washing process is completed. - In the steam washing method of the washing machine according to the embodiment, steam washing is performed again after completion of the spin-dry cycle, thereby improving sterilization effect of the steam washing course by sterilizing bacteria attached to the laundry during the washing and rinsing cycles. Further, in the steam washing method of this embodiment, steam is generated by means of the wash heater without using a separate steam heater, so that steam is not generated during the washing cycle, thereby reducing power consumption.
- Next, a steam washing method of the washing machine according to anther embodiment of the present invention will be described with reference to
FIG. 4 . For convenience of description, illustration and description of the same or similar components as those of the above embodiment will be omitted herein. -
FIG. 4 is a flowchart of a steam washing method of a washing machine according to another embodiment of the present invention. - Referring to
FIGS. 1 , 2 and 4, when a steam washing course is selected on thekey input unit 210 with laundry received in thedrum 110 of the washing machine in S200, thecontroller 200 outputs a control signal to open thewater supply valve 135. Then, wash water for steam is supplied into thetub 105 until it reaches a preset steam level for performing the steam washing course, in S203. - When the
level detection sensor 220 detects that the wash water reaches the preset steam level inside theheater compartment 160 defined at the lower part of thetub 105 in S206, thecontroller 200 closes thewater supply valve 135 and operates thedrive motor 145 to drive thedrum 110, thereby agitating the laundry in thedrum 110. Here, thedrum 110 may be alternately rotated in the forward and reverse directions to enhance efficiency of washing operation. - Then, the
wash heater 165 is operated to heat the wash water to a preset temperature and generate steam in S209˜S212, and primary steam washing is performed in S215. In the steam washing course, wash water is intermittently supplied through thewater supply valve 135 to efficiently generate steam while thewash heater 165 heats the wash water to generate the steam. - After completion of the primary steam washing in S215, the
controller 200 opens thewater supply valve 135 and starts wash water supply into thetub 105 along with detergent contained in thedetergent supply part 130 in S221. When thelevel detection sensor 220 detects that wash water reaches a preset wash water level, thecontroller 200 closes thewater supply valve 135 to stop the wash water supply in S224. - Next, in S227 and S230, a washing cycle is performed by heating the wash water to a preset temperature with the
wash heater 165 while agitating the laundry in thedrum 110 by operating thedrive motor 145 to alternately rotate thedrum 110 in the forward and reverse directions. After completion of the washing cycle, thecontroller 200 stops thewash heater 165 and thedrive motor 145 in S233. - Then, a rinsing cycle is performed in S236. The rinsing cycle is performed by supplying wash water into the
tub 105 through thewater supply valve 135 and then alternately rotating thedrum 110 in the forward and reverse directions to agitate the laundry in thedrum 110 by thedrive motor 145 in response to a control signal from thecontroller 200. The rinsing cycle is performed once or more, and the last rinsing cycle will be referred to as a final rinsing cycle. - Here, secondary steam washing is performed before the final rinsing cycle, that is, between the rinsing cycles. After completion of the secondary steam washing, the final rinsing cycle is performed, thereby completing the rinsing cycle.
- For the secondary steam washing, the
water supply valve 135 is opened and steam water supply is started to supply wash water for steam into thetub 105 up to a preset steam level in S239. When thelevel detection sensor 220 detects that the wash water reaches the preset steam level in S242, thecontroller 200 closes thewater supply valve 135 and operates thedrive motor 145 to rotate thedrum 110, thereby agitating the laundry in thedrum 110. Here, thedrum 110 may be alternately rotated in the forward and reverse directions. - Then, in the steam washing method of this embodiment, the
wash heater 165 is operated to heat wash water to a preset temperature and generate steam in S245˜S248, and the secondary steam washing is performed in S251. During the secondary steam washing, wash water is intermittently supplied through thewater supply valve 135 or the assistantwater supply valve 135 to maintain the steam level and efficiently generate steam while thewash heater 165 heats the wash water to generate the steam. After completion of the secondary steam washing of S254, the final rinsing cycle is performed in S257. Since the final rinsing cycle is performed after steam washing, it is possible to prevent effects of fabric softeners and the like used in the rinsing cycle from being reduced due to the steam washing. After completion of all rinsing cycles, a spin-dry cycle is performed in S260, thereby completing the washing process. - In the steam washing method of this embodiment, steam washing is performed again between the washing cycle and the final rinsing cycle, improving sterilization effect of the steam washing operation by sterilizing bacteria attached to laundry during the washing and rinsing cycles. Further, in the steam washing method of this embodiment, steam is generated by means of a wash heater without using a separate steam heater so that steam is not generated during the washing cycle, thereby reducing power consumption.
- The washing machine and steam washing method thereof according to the present invention have various advantageous effects.
- For example, hot steam is generated using a wash heater to perform steam sterilization of bacteria and fungi in laundry.
- Additionally, since steam washing is performed again after a spin-dry cycle, bacteria and fungi attached to laundry during washing and rinsing cycles can be sterilized, thereby improving sterilization effects.
- Further, since steam washing is performed again after the washing and rinsing cycles, bacteria and fungi attached to laundry during the washing and rinsing cycles can be sterilized, thereby improving the sterilization effects.
- Further, since a glass window of a door is fogged by steam generated during the steam washing, it is possible to visually confirm the steam washing process.
- Moreover, since steam is generated by the wash heater without using a separate steam heater, the washing machine can perform a washing cycle without generating steam, thereby reducing power consumption.
- Although the present invention has been described with reference to the embodiments and the accompanying drawings, the embodiments and drawings are given by way of illustration only, and, it will be apparent to those skilled in the art that various modifications and equivalent embodiments can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should be limited only by the accompanying claims.
Claims (5)
1. A washing machine comprising:
a water supply tube supplying wash water to a tub;
a heater compartment to contain the wash water;
a wash heater heating the wash water contained in the heater compartment to generate steam; and
a level detection sensor detecting a level of the wash water contained in the heater compartment.
2. The washing machine according to claim 6, further comprising:
a gasket disposed at one side of the tub;
a drum disposed inside the tub to receive laundry; and
an assistant water supply tube passing through the gasket to prevent wash water for steam from being supplied to the laundry.
3. The washing machine according to claim 2 , wherein the assistant water supply tube communicates with the water supply tube.
4. The washing machine according to claim 3 , further comprising:
a water supply valve between the assistant water supply tube and the water supply tube.
5. The washing machine according to claim 1 , wherein the heater compartment extends outwardly from the tub.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/961,919 US20110072861A1 (en) | 2007-05-25 | 2010-12-07 | Washing Machine and Steam Washing Method Thereof |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070051063A KR20080103831A (en) | 2007-05-25 | 2007-05-25 | Washing method with steam for drum type washing machine |
KR1020070051062A KR20080103830A (en) | 2007-05-25 | 2007-05-25 | Washing method with steam for drum type washing machine |
KR10-2007-0051063 | 2007-05-25 | ||
KR10-2007-0051062 | 2007-05-25 | ||
US12/126,339 US7865991B2 (en) | 2007-05-25 | 2008-05-23 | Washing machine and steam washing method thereof |
US12/961,919 US20110072861A1 (en) | 2007-05-25 | 2010-12-07 | Washing Machine and Steam Washing Method Thereof |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/126,339 Division US7865991B2 (en) | 2007-05-25 | 2008-05-23 | Washing machine and steam washing method thereof |
Publications (1)
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US20110072861A1 true US20110072861A1 (en) | 2011-03-31 |
Family
ID=39929852
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US12/126,339 Expired - Fee Related US7865991B2 (en) | 2007-05-25 | 2008-05-23 | Washing machine and steam washing method thereof |
US12/961,919 Abandoned US20110072861A1 (en) | 2007-05-25 | 2010-12-07 | Washing Machine and Steam Washing Method Thereof |
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Application Number | Title | Priority Date | Filing Date |
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US12/126,339 Expired - Fee Related US7865991B2 (en) | 2007-05-25 | 2008-05-23 | Washing machine and steam washing method thereof |
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US (2) | US7865991B2 (en) |
EP (2) | EP2372007B1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US20110197638A1 (en) * | 2010-02-17 | 2011-08-18 | Bsh Home Appliances Corporation | Steam generator for domestic household appliance |
EP2503048B1 (en) * | 2011-03-24 | 2018-09-12 | Electrolux Home Products Corporation N.V. | Method for washing laundry in a laundry washing machine and laundry washing machine |
US9121124B2 (en) * | 2012-01-19 | 2015-09-01 | General Electric Company | Vertical axis washing machine appliance with features for applying steam to articles and related methods |
KR20140098485A (en) * | 2013-01-31 | 2014-08-08 | 엘지전자 주식회사 | washing machine and a control method of the same |
DE102014108591B4 (en) * | 2014-06-18 | 2016-10-20 | Miele & Cie. Kg | Method for damp washing |
CN106120240A (en) * | 2016-06-30 | 2016-11-16 | 无锡小天鹅股份有限公司 | The control method of rotary drum washing machine and system |
CN108950980B (en) * | 2017-05-23 | 2022-06-28 | 合肥海尔滚筒洗衣机有限公司 | Washing machine and steam washing method thereof |
JP2021069529A (en) * | 2019-10-30 | 2021-05-06 | 日立グローバルライフソリューションズ株式会社 | Washing machine |
CN115247358A (en) * | 2022-05-16 | 2022-10-28 | 创维电器股份有限公司 | Washing machine with steam sterilization and mite removal functions and control method thereof |
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- 2008-05-23 US US12/126,339 patent/US7865991B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
US7865991B2 (en) | 2011-01-11 |
EP2009167A3 (en) | 2009-08-12 |
EP2372007B1 (en) | 2016-08-03 |
EP2009167A2 (en) | 2008-12-31 |
US20080289117A1 (en) | 2008-11-27 |
EP2372007A1 (en) | 2011-10-05 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: DAEWOO ELECTRONICS CORPORATION, KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEE, JONG CHIL;REEL/FRAME:025765/0263 Effective date: 20080701 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |