US20060101586A1 - Washing machine and method for controlling the same - Google Patents

Washing machine and method for controlling the same Download PDF

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Publication number
US20060101586A1
US20060101586A1 US11/153,388 US15338805A US2006101586A1 US 20060101586 A1 US20060101586 A1 US 20060101586A1 US 15338805 A US15338805 A US 15338805A US 2006101586 A1 US2006101586 A1 US 2006101586A1
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United States
Prior art keywords
generating device
steam
steam generating
wash water
water supply
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Abandoned
Application number
US11/153,388
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English (en)
Inventor
Jee Park
Hyung Kim
Sang Pyo
Seon Park
Hyun Kim
Seong Oak
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, HYUN SOOK, KIM, HYUNG GYOON, OAK, SEONG MIN, PARK, JEE HUN, PARK, SEON WOO, PYO, SANG YEON
Publication of US20060101586A1 publication Critical patent/US20060101586A1/en
Abandoned legal-status Critical Current

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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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/36—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/44—Control of the operating time, e.g. reduction of overall operating time
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/088—Liquid supply 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/38—Time, e.g. duration
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/52—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to electric heating means, e.g. temperature or voltage
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/10—Temperature of washing liquids; Heating means therefor

Definitions

  • Apparatuses and methods consistent with the present invention relates to a washing machine with a steam generating device for generating steam directly from wash water, and more particularly, to a washing machine for rapidly heating supplied wash water to provide optimum steam and a method for controlling the same.
  • a drum washing machine is an apparatus for washing laundry by means of force for elevating and then dropping the laundry in a cylindrical drum when the drum is rotated.
  • the drum washing machine has a long washing time, but keeps damage to the laundry to a minimum and consumes a small amount of wash water.
  • demand for drum washing machines is increasing.
  • Japanese Patent Laid-open Publication No. 2001-149685 discloses a drum washing machine with a device for heating wash water to wash the laundry.
  • the washing machine disclosed by the above Patent comprises a tub containing wash water, a drum rotatably installed in the tub and rotated by rotary force supplied from a driving motor, and a heater installed below the tub for heating the wash water contained in the tub.
  • the washing machine When the washing machine performs a washing operation under the condition that the wash water and the laundry are put into the tub, the laundry together with the wash water is elevated along the inner circumferential surface of the drum and dropped by the rotation of the drum in the tub, thereby washing the laundry.
  • the wash water is heated by the heater, the washing efficiency of the washing machine is increased.
  • the above conventional washing machine Since a large amount of wash water contained in the tub is heated by the heater installed below the tub after the wash water is supplied, the above conventional washing machine is disadvantageous in that it takes a long time to heat the wash water to a temperature required to wash the laundry, thereby requiring an increased overall washing time.
  • one aspect of the present invention is to provide a washing machine and a method for controlling the same, in which supplied wash water is rapidly heated to supply optimum steam to the inside of a tub so that a washing time is shortened, the steam of a high temperature is directly sprayed onto laundry to have sterilizing and soaking effects so that washing performance is improved, and a consumption rate of energy for heating the wash water is reduced.
  • Another aspect of the present invention is to provide a washing machine and a method for controlling the same, in which steam of a high temperature is sprayed onto laundry to increase the temperature of the laundry in a short period of time, thereby improving detergency to increase washing effects and eliminating wrinkling of the laundry.
  • the present invention provides a method for controlling a washing machine, which heats supplied wash water using a steam generating device to generate steam, comprising: sensing a temperature of the steam generating device; controlling water supply means for supplying the wash water to the steam generating device according to the sensed temperature of the steam generating device; and performing a steam operation for controlling the steam generated from the steam generating device according to a time taken to control the water supply means.
  • the water supply means may be controlled such that the wash water is supplied to the steam generating device when the temperature of the steam generating device is more than a predetermined reference temperature; and the water supply means may be controlled such that the wash water supplied to the steam generating device is cut off when the temperature of the steam generating device is not more than a predetermined reference temperature.
  • the wash water supplied to the steam generating device may be cut off to stop the generation of the steam, when a time during which the water supply means is turned on to supply water exceeds a predetermined water supply time; and the wash water may be supplied to the steam generating device to generate the steam, when a time during which the water supply means is turned off to stop supplying water exceeds a predetermined water supply stop time.
  • the present invention provides a method for controlling a washing machine, which heats supplied wash water using a steam generating device to generate steam, comprising: preheating the steam generating device before the wash water is supplied to the steam generating device; sensing a temperature of the preheated steam generating device; controlling water supply means for supplying the wash water to the steam generating device by comparing the sensed temperature of the steam generating device to a predetermined reference temperature; and controlling the generation of the steam by comparing a time, taken to control the water supply means, to a predetermined water supply time and a predetermined water supply stop time.
  • the wash water supplied to the steam generating device may be cut off to stop the generation of the steam, when a time during the turning on of the water supply means exceeds the predetermined water supply time; and the wash water may be supplied to the steam generating device to generate the steam, when a time during the turning off of the water supply means exceeds the predetermined water supply stop time.
  • the present invention provides a washing machine having a steam generating device for heating supplied wash water to generate steam comprising: a temperature sensing unit for sensing a temperature of the steam generating device; water supply means for supplying the wash water to the steam generating device; and a control unit for controlling the water supply means such that the steam generated from the steam generating device is controlled according to the temperature of the steam generating device.
  • control unit may control the steam generating device such that the steam generating device is preheated before the wash water is supplied to the steam generating device; and the control unit may compare a time, taken to control the water supply means to a predetermined water supply time and a predetermined water supply stop time, and controls the generation of the steam according to the result of the comparison.
  • the water supply means may be a steam valve capable of being turned on and off so as to control the wash water supplied to the steam generating device according to control of the control unit.
  • FIG. 1 is a longitudinal sectional view of a washing machine according to an exemplary embodiment of the present invention
  • FIG. 2 is a block diagram of a washing machine in accordance with an exemplary embodiment of the present invention.
  • FIG. 3 is a flow chart illustrating a method for controlling the washing machine according to an exemplary embodiment of the present invention.
  • FIG. 4 is a flow chart illustrating a detailed process for heating wash water and laundry using steam in the method of FIG. 3 .
  • FIG. 1 is a longitudinal sectional view of a washing machine according to an exemplary embodiment of the present invention.
  • the washing machine comprises a drum-type tub 11 installed in a main body 10 for containing wash water, and a drum 12 rotatably installed in the tub 11 .
  • the tub 11 meets the installation surface of the washing machine at a designated angle ( ⁇ ) such that a front surface 11 a of the tub 11 , through which an inlet 11 b is formed, has a level higher than that of a rear surface 11 c of the tub 11 , and the drum 12 installed in the tub 11 is inclined in the same manner as the tub 11 such that a front surface 12 a of the drum 12 , through which an inlet 12 b is formed, has a level higher than that of a rear surface 12 c of the drum 12 .
  • the front surface 12 a of the drum 12 through which the inlet 12 b is formed, turns upwards, and a rotational central line A of the drum 12 meets the installation surface of the washing machine at the designated angle (a).
  • a rotary shaft 13 connected to the center of the rear surface 12 c of the drum 12 is rotatably supported to the center of the rear surface 11 c of the tub 11 , thereby allowing the drum 12 to be rotated in the tub 11 .
  • a plurality of through holes 12 d are formed through the circumferential surface of the drum 12 .
  • a plurality of drain holes 12 e for discharging wash water in the drum 12 when the drum 12 is rotated at a high speed, are formed through the outer portion of the front surface 12 a of the drum 12 .
  • a plurality of lifters 14 for elevating and dropping laundry when the drum 12 is rotated, are installed along the inner surface of the drum 12 .
  • a motor 15 serving as a driving device for rotating the rotary shaft 13 connected to the drum 12 , is installed at the outer portion of the rear surface 11 c of the tub 11 .
  • the motor 15 includes a stator 15 a fixed to the rear surface 11 c of the tub 11 , a rotor 15 b rotatably disposed outside the stator 15 a , and a driving plate 15 c for connecting the rotor 15 b and the rotary shaft 13 .
  • An inlet 16 for allowing laundry to be put into or taken out of the drum 12 is formed through a position of the front surface of the main body 10 corresponding to the positions of the inlet 12 b of the drum 12 and the inlet 11 b of the tub 11 .
  • a door 17 for opening and closing the inlet 16 is installed at the inlet 16 .
  • a detergent supply device 18 for supplying a detergent to the inside of the tub 11 , a steam generating device 30 for generating optimum steam to the inside of the tub 11 , and a water supply device 20 for supplying water to the tub 11 and the steam generating device 30 are installed above the tub 11 .
  • the detergent supply device 18 includes a space for containing the detergent therein, and is installed close to the front surface of the main body 10 so that a user can easily put the detergent into the detergent supply device 18 .
  • the water supply device 20 includes a water supply pipe 21 for supplying water to the inside of the tub 11 , and a water supply valve 22 installed in the water supply pipe 21 for controlling the supply of the water to the inside of the water supply pipe 21 .
  • the water supply pipe 21 is connected to the detergent supply device 18 so that the water supplied from the outside is supplied to the detergent supply device 18 .
  • a connection pipe 23 is installed between the detergent supply device 18 and the tub 11 such that the water having passed through the detergent supply device 18 is supplied to the tub 11 .
  • the connection pipe 23 causes water, which is supplied to the inside of the tub 11 , to pass through the detergent supply device 18 , thereby allowing the detergent contained in the detergent supply device 18 to be dissolved in the water and then supplied to the inside of the tub 11 .
  • the water supply device 20 further includes a steaming water supply pipe 24 for supplying water to the steam generating device 30 as well as to the detergent supply device 18 , and a steam valve 25 installed in the steaming water supply pipe 24 for controlling the supply of the water to the steam generating device 30 .
  • the water supply device 20 includes the water supply valve 22 and the steam valve 25 , which are separately installed as described above, the present invention is not limited thereto.
  • the water supply device 20 may include an integrated assembly of the water supply valve 22 and the steam valve 25 using a conventional electric three-way or four-way valve.
  • the steam generating device 30 includes a U-shaped steam heater 32 installed therein for rapidly heating water passing therethrough to generate steam at a high temperature of at least 100° C., a temperature sensor 34 installed at one side of the steam generating device 30 for sensing the temperature of the steam generating device 30 , a steam supply pipe 36 extended from the steam generating device 30 to the tub 11 , and a discharge nozzle 38 installed at an outlet of the steam supply pipe 36 .
  • the steam heater 32 is installed in the steam generating device 30 , as described above, the present invention is not limited thereto.
  • the steam heater 32 may be an external heater having a structure contacting the external surface of an upper or lower portion of the steam generating device 30 or surrounding the external circumferential surface of the steam generating device 30 .
  • a heater 40 for heating the wash water supplied to the inside of the tub 11 is installed in the lower portion of the tub 11 .
  • a heater receiving portion 41 for receiving the heater 40 and collecting a designated quantity of the wash water is formed in the lower surface of the tub 11 such that the heater receiving portion 41 has a downwardly protruded structure. This structure of the heater receiving portion 41 allows the heater 40 to be soaked in the wash water collected in the heater receiving portion 41 .
  • the heater 40 is received by the heater receiving portion 41 , thereby being rotated without interfering with the drum 12 .
  • the washing machine of the present invention further comprises a drain device 50 for discharging the wash water of the inside of the tub 11 , and a wash water circulating device 60 for supplying the wash water in the tub 11 , heated by the heater 40 , to the inside of the drum 12 .
  • the drain device 50 includes a first drain pipe 51 connected to a drain hole 42 formed through the heater receiving portion 41 at the lower surface of the tub 11 for guiding the water in the tub 11 to the outside, a drain pump 52 installed in the first drain pipe 51 , and a second drain pipe 53 connected to an outlet of the drain pump 52 .
  • the wash water circulation device 60 includes a channel change valve 61 installed in the second drain pipe 53 connected to the outlet of the drain pump 52 , a wash water circulating pipe 62 extended from the channel change valve 61 to the inlet 12 b of the drum 12 , and a spray nozzle 63 installed at an outlet of the wash water circulating pipe 62 .
  • the channel change valve 61 serves to change a channel such that the wash water at the outlet of the drain pump 52 is discharged to the outside or flows to the wash water circulating pipe 62 , and is generally an electric three-way valve.
  • the water supply valve 22 of the water supply device 20 is opened so that wash water is supplied to the detergent supply device 18 .
  • the detergent of the detergent supply device 18 is dissolved in the wash water supplied to the tub 11 through the detergent supply device 18 , and is then supplied to the inside of the tub 11 .
  • the washing machine according to an exemplary embodiment of the present invention which comprises the wash water circulating device 60 , does not need to supply the wash water to a level of the inside of the drum 12 for soaking the laundry in the drum 12 , thereby reducing the quantity of wash water required as compared to the conventional washing machine.
  • the heater 40 is operated to heat the wash water filling the tub 11 . Since the washing machine according to an exemplary embodiment of the present invention requires a small quantity of the supplied wash water compared to the conventional washing machine, the temperature of the wash water heated by the heater 40 is rapidly increased, thereby shortening an overall washing time and reducing the quantity of energy consumed to heat the wash water.
  • the channel change valve 61 of the wash water circulating device 60 is operated. Then, the channel is formed such that the outlet of the drain pump 52 communicates with the wash water circulating pipe 62 , and the wash water at the lower portion of the tub 11 is supplied to the inside of the drum 12 through the first drain pipe 51 and the wash water circulating pipe 62 by the operation of the drain pump 52 .
  • the wash water supplied to the inside of the drum 12 is sprayed onto the laundry through the spray nozzle 63 , the wash water uniformly soaks the laundry.
  • the drum 12 is rotated at a low speed by the operation of the motor 15 , thereby achieving a washing operation.
  • the wash water flows into the tub 11 through the drain holes 12 e .
  • the wash water is circulated such that the wash water contained in the tub 11 is supplied again to the inside of the drum 12 through the first drain pipe 51 and the wash water circulating pipe 62 by the operation of the drain pump 52 .
  • the steam valve 25 is opened so that the wash water is supplied to the steam generating device 30 through the steaming water supply pipe 24 , and the wash water supplied to the steam generating device 30 is rapidly heated by the steam heater 32 to generate steam at a high temperature of at least 100° C.
  • the steam at high temperature is supplied to the inside of the tub 11 through the steam supply pipe 36 and the discharge nozzle 38 , and serves to additionally heat the wash water and the laundry in the tub 11 , which were previously heated by the heater 40 .
  • a rinsing operation in which dehydration and repeated supply of wash water occurs, is performed.
  • the water supply valve 22 is opened so that water is supplied to the inside of the tub 11 through the water supply pipe 21 .
  • the channel change valve 61 is opened so that the outlet of the drain pump 52 is opened toward the external drain pipe 53 , and the drain pump 52 is operated, thereby discharging the water in the tub 11 .
  • the drain pump 52 When a final dehydrating operation is performed after the rinsing operation, the drain pump 52 is operated under the condition that the outlet of the drain pump 52 is opened toward the external drain pipe 53 , and the drum 12 is rotated at a high speed for a designated time, thereby dehydrating the laundry in the tub 11 .
  • FIG. 2 is a block diagram of a washing machine in accordance with an exemplary embodiment of the present invention.
  • the washing machine comprises a signal input unit 100 , a water level sensing unit 110 , a temperature sensing unit 120 , a control unit 130 , and an operating unit 140 .
  • the signal input unit 100 allows a user to input selected operating data, such as a washing course, a washing temperature, a dehydrating rotation speed, and an additional rinsing operation.
  • the water level sensing unit 110 senses the level of the wash water supplied to the inside of the tub 11 .
  • the temperature sensing unit 120 includes a temperature sensor 34 for sensing the temperature of the wash water supplied to the tub 11 and the temperature of the steam generating device 30 .
  • the control unit 130 is a microcomputer for controlling the washing machine according to the operating data inputted from the signal input unit 100 .
  • the control unit 130 controls operations of the steam valve 25 and the steam heater 32 based on the temperature sensed by the temperature sensing unit 120 , thereby causing the steam generating device 30 to generate a large quantity of steam at a high temperature of at least 100° C.
  • the operating unit 140 operates the motor 15 , the water supply valve 22 , the steam valve 25 , the steam heater 32 , the heater 40 , the drain pump 52 , and the channel change valve 61 based on an operation control signal of the control unit 130 .
  • FIG. 3 is a flow chart illustrating the method for controlling the washing machine of the present invention.
  • S denotes an operation.
  • the method for controlling the washing machine of the present invention comprises operations (S 100 ⁇ S 200 ) of supplying wash water to the inside of the tub 11 according to a steam washing course selected by a user; operations (S 300 ⁇ S 400 ) of heating the wash water supplied to the inside of the tub 11 using the heater 40 ; operations (S 500 ⁇ S 600 ) of heating the wash water and laundry in the tub 11 , heated by the heater 40 , by spraying steam of a high temperature of at least 100° C.
  • the operating data selected by the user are inputted to the control unit 130 through the signal input unit 100 (S 100 ).
  • a washing course for example, a steam washing course
  • a washing temperature for example, a washing temperature
  • a dehydrating rotation speed for example, a washing temperature
  • an additional rinsing operation the operating data selected by the user are inputted to the control unit 130 through the signal input unit 100 (S 100 ).
  • control unit 130 turns the water supply valve 22 on so that wash water is supplied to the detergent supply device 18 , and a detergent in the detergent supply device 18 is dissolved in the wash water supplied to the inside of the tub 11 through the detergent supply device 18 , and is then supplied to the tub 11 (S 200 ).
  • the method for controlling the washing machine according to an exemplary embodiment of the present invention which comprises the wash water circulating device 60 , does not need to supply the wash water to a level of the inside of the drum 12 for soaking the laundry in the drum 12 . Therefore, the quantity of wash water required is reduced as compared to conventional washing machines.
  • control unit 130 After a designated quantity of the wash water is supplied to the inside of the tub 11 through the water supply pipe 21 , the control unit 130 turns the water supply valve 22 off so that the supply of the wash water to the water supply pipe 21 is stopped.
  • the heater 40 is operated by the controlling operation of the control unit 130 , thereby heating the wash water in the tub 11 (S 300 ). Since the method for controlling the washing machine according to an exemplary embodiment of the present invention requires a small quantity of the supplied wash water compared to the conventional method, the temperature of the wash water heated by the heater 40 is rapidly increased, thereby shortening an overall washing time and reducing the quantity of energy consumed to heat the wash water.
  • An operating time of the heater 40 is checked, and it is determined whether or not a designated time (T 1 ; a time taken to heat the wash water to a temperature required to perform a washing operation using the heater 40 ) elapses (S 400 ). When it is determined that the designated time (T 1 ) has elapsed, the operation of the heater 40 is stopped.
  • control unit 130 controls the steam valve 25 so that the wash water is supplied to the steam generating device 30 through the steaming water supply pipe 24 , and the wash water supplied to the steam generating device 30 is rapidly heated by the steam heater 32 to generate steam at a high temperature of at least 100° C.
  • the steam at high temperature is supplied to the inside of the tub 11 through the steam supply pipe 36 and the discharge nozzle 38 , and serves to additionally heat the wash water and the laundry in the tub 11 , which were previously heated by the heater 40 (S 500 ).
  • the method for controlling the washing machine requires a small quantity of the supplied wash water due to the use of the wash water circulating device 60 and supplies a large quantity of the steam at a high temperature of at least 100° C. to the inside of the tub 11 through the steam generating device 30 , the method rapidly increases the temperature of the wash water compared to the conventional method, in which the wash water is heated only by the heater 40 installed in the lower portion of the tub 11 , thereby remarkably shortening an overall washing time and reducing the quantity of energy consumed to heat the wash water.
  • the method for controlling the washing machine sprays the steam at high temperature onto the laundry, which is sufficiently soaked by the wash water, the temperature of the laundry is rapidly increased, thereby shortening the washing time and improving the detergency to increase the washing effects of the washing machine.
  • a steam supply time of the steam generating device 30 is checked, and it is determined whether or not a designated time (T 2 ; overall operating time of the steam generating device 30 from a point of the time when the steam heater 32 is preheated, approximately 6 ⁇ 10 minutes) elapses (S 600 ).
  • T 2 designated time
  • S 600 the operation of the steam heater 32 is stopped, and the drum 12 is rotated at a low speed by the operation of the motor 15 so that washing operation is performed according to the selected washing course (S 700 ).
  • control unit 130 preheats the steam heater 32 installed in the steam generating device 30 (S 510 ).
  • the steam heater 32 is preheated so that the steam generating device 30 , at an initial operating state, supplies pure steam, which is not mixed with water at room temperature (23 ⁇ 24° C.), to the inside of the tub 11 .
  • the temperature sensing unit 120 senses a temperature (S T ) of the steam generating device 30 due to the preheating of the steam heater 32 , and outputs the sensed temperature (S T ) to the control unit 130 (S 520 ).
  • the control unit 130 determines whether or not the temperature (S T ) of the steam generating device 30 inputted from the temperature sensing unit 120 is more than a predetermined reference temperature (S TS ; the lowermost temperature for heating the steam heater 32 to generate steam, approximately 100° C.) (S 530 ).
  • the wash water is supplied to the steam generating device 30 through the steaming water supply pipe 24 , and the wash water supplied to the steam generating device 30 is rapidly heated by the steam heater 32 to generate steam at a high temperature of at least 100° C.
  • the steam of the high temperature is supplied to the inside of the tub 11 through the steam supply pipe 36 and the discharge nozzle 38 , and additionally heats the wash water and the laundry in the tub 11 , which were previously heated by the heater 40 .
  • a time during the turning off of the steam valve 25 is checked, and when a designated time (T 4 ; a time taken to increase the temperature of the steam generating device 30 to a high temperature of at least 100° C., approximately 10 seconds) has elapsed (S 570 ), the control unit 130 turns the steam valve 25 on again until the designated time (T 2 ) elapses, thereby repeating the above process.
  • T 4 a designated time
  • T 2 a time taken to increase the temperature of the steam generating device 30 to a high temperature of at least 100° C., approximately 10 seconds
  • aspects of the present invention provide a washing machine and a method for controlling the same, in which supplied wash water is rapidly heated in a short period of time so that a large quantity of steam at a high temperature of at least 100° C. is supplied to the inside of a tub so as to rapidly increase the temperature of the wash water, thereby shortening an overall washing time and reducing a consumption rate of energy for heating the wash water.
  • the washing machine and the method for controlling the same according to aspects of the present invention are advantageous in that the overall washing time is shortened and sterilizing effects are improved. Moreover, the washing machine and the method for controlling the same according to aspects of the present invention increase soaking effects of the laundry, thereby increasing washing efficiency, reducing the quantity of energy consumed to perform the washing operation, and eliminating wrinkling of the laundry as a result of the use of steam.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
US11/153,388 2004-11-18 2005-06-16 Washing machine and method for controlling the same Abandoned US20060101586A1 (en)

Applications Claiming Priority (2)

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KR2004-94773 2004-11-18
KR1020040094773A KR20060055222A (ko) 2004-11-18 2004-11-18 세탁기 및 그 제어방법

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US (1) US20060101586A1 (de)
EP (1) EP1659205A3 (de)
JP (1) JP2006141985A (de)
KR (1) KR20060055222A (de)
CN (1) CN1776073A (de)
RU (1) RU2294994C1 (de)

Cited By (41)

* Cited by examiner, † Cited by third party
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US20070283509A1 (en) * 2006-06-09 2007-12-13 Nyik Siong Wong Draining liquid from a steam generator of a fabric treatment appliance
US20070283728A1 (en) * 2006-06-09 2007-12-13 Nyik Siong Wong Prevention of scale and sludge in a steam generator of a fabric treatment appliance
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JP2006141985A (ja) 2006-06-08
EP1659205A2 (de) 2006-05-24
RU2294994C1 (ru) 2007-03-10
KR20060055222A (ko) 2006-05-23
CN1776073A (zh) 2006-05-24
RU2005118694A (ru) 2006-12-27

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