EP4471202A1 - Waschtrockner und verfahren zur steuerung des waschtrockners zur dampfpflege in den wäsche - Google Patents

Waschtrockner und verfahren zur steuerung des waschtrockners zur dampfpflege in den wäsche Download PDF

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Publication number
EP4471202A1
EP4471202A1 EP24174526.4A EP24174526A EP4471202A1 EP 4471202 A1 EP4471202 A1 EP 4471202A1 EP 24174526 A EP24174526 A EP 24174526A EP 4471202 A1 EP4471202 A1 EP 4471202A1
Authority
EP
European Patent Office
Prior art keywords
water
water supply
turned
supply device
drum
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.)
Pending
Application number
EP24174526.4A
Other languages
English (en)
French (fr)
Inventor
Chao Xu
Xing Liu
Tao Dong
Xingao Zheng
Ruxiu Zhu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP4471202A1 publication Critical patent/EP4471202A1/de
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/203—Laundry conditioning 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 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/52—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/65—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of conditioning or finishing phases, e.g. for smoothing or removing creases
    • 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/20—Operation modes, e.g. delicate laundry washing programs, service modes or refreshment cycles
    • 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
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • 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
    • D06F2105/08—Draining of washing liquids
    • 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
    • D06F2105/28—Electric heating
    • 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
    • D06F2105/30—Blowers
    • 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
    • D06F2105/36—Condensing arrangements, e.g. control of water injection therefor
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed

Definitions

  • the present invention relates to the field of control methods of washer dryers, and also relates to a washer dryer.
  • a common and easy-to-think approach is to introduce a steam generating device. For example, water in a specially arranged water container is heated, or water mists are generated by using an atomization device, and then the water mists are heated. As a result, this not only increases costs of a machine, but also takes up the already cramped space in the machine, which increases design difficulty and maintenance costs of the machine.
  • An object of the present invention is to generate steam through a new control method by using existing hardware of a washer dryer, thereby giving steam care to laundry.
  • Embodiments of the present invention disclose a method of controlling a washer dryer to give steam care to laundry.
  • the washer dryer includes a circulating air duct with two ends in communication with a treatment tub.
  • a heating device and a blowing device are arranged in the circulating air duct.
  • a water supply device is configured to introduce water flow into the circulating air duct or along a tub wall of the treatment tub.
  • a rotatable drum is arranged in the treatment tub, and a gap exists between the drum and the treatment tub.
  • the control method includes the following steps:
  • the drum is caused to rotate at the first rotational speed, where the first rotational speed is greater than or equal to a minimum dehydration rotational speed.
  • An optional implementation further includes that a level of water supplied by the water supply device and finally entering the treatment tub is detected after the water supply device is turned on, and the drum is caused to rotate at the first rotational speed when the water level reaches a first predetermined water level, where the first predetermined water level is less than or equal to a water level of a water surface that exactly reaches an outer surface of the drum.
  • the drum switches to rotate at a second rotational speed after rotating at the first rotational speed for a first predetermined duration, where the second rotational speed is set to be less than the minimum dehydration rotational speed, and laundry is rotatable at the second rotational speed.
  • the drum is rotated in a single direction at the first rotational speed, and the drum is rotated alternately in two directions at the second rotational speed.
  • the drum is rotated alternately at the first rotational speed and the second rotational speed.
  • An optional implementation further includes that the first temperature is a highest safe temperature for fabrics.
  • the heating device is controlled to reduce the air temperature downstream of the heating device to a second temperature.
  • An optional implementation further includes that after the water supply device is turned on, the water supply device is turned on and turned off at a preset frequency, and the blowing device and the heating device are kept on during turn-off of the water supply device.
  • the water supply device includes a first water supply device with a great flow rate and a second water supply device with a small flow rate. On this condition, only the first water supply device is preferably turned on.
  • the circulating air duct includes a heat exchange region, and the water supply device is configured to spray water to a wall of the heat exchange region.
  • the water level in the treatment tub may rise, which may result in water entering the drum to soak the laundry in the drum. Therefore, the water level in the treatment tub is detected after the water supply device is turned on, and a drainage device is turned on to drain the water in the treatment tub when the water level reaches a second predetermined water level, where the second predetermined water level is less than a level of water that exactly reaches an outer surface of the drum.
  • the drainage device When the drainage device is turned on for a third preset duration, or when it is detected that the water level of the treatment tub is less than or equal to a third predetermined water level, the drainage device is turned off.
  • the water supply device is turned off when the water level reaches the second predetermined water level, the water supply device is turned on again when the water level is less than or equal to the third predetermined water level, and the blowing device and the heating device are kept on before the water supply device is turned on again after being turned off.
  • An optional implementation further includes that after the water supply device is turned on, a drainage device is turned on and turned off at a predetermined frequency that prevents water from entering the drum to drain the water in the treatment tub.
  • the present invention further provides a washer dryer, including a circulating air duct with two ends in communication with a treatment tub.
  • a heating device and a blowing device are arranged in the circulating air duct.
  • a water supply device is configured to introduce water flow into the circulating air duct.
  • a rotatable drum is arranged in the treatment tub. A gap exists between the drum and the treatment tub.
  • the washer dryer further includes a control device. The control device is arranged to control operation of the washer dryer according to the method of any one or any combination of the various embodiments described above.
  • a user-selectable steam care program is preset in the control device, and after the steam care program is started.
  • the control device is configured to control the operation of the washer dryer according to the method of at least any one or any combination of the various embodiments described above.
  • steam may be generated by using a basic configuration of a machine without adding a special steam generating device, and the steam care is given to the laundry.
  • hot air passing through the circulating air duct has a high flow speed, a great flow rate, concentrated heat, and a good effect on water evaporation, a large amount of steam may be generated per unit time, which has a good care effect on the laundry.
  • the water flow introduced along the tub wall of the treatment tub has a large diffusion area and a large contact area with the hot air, and therefore the amount of steam generated per unit time is also large.
  • a washer dryer 100 includes a treatment tub 2 and a drum 4 rotatably arranged in the treatment tub 2.
  • a gap exists between the drum 4 and the treatment tub 2.
  • Fine through holes are provided on a drum wall of the drum 4, so that water and air may circulate between the drum 4 and the treatment tub 2.
  • a bottom of the treatment tub 2 is in communication with a drainage device 6.
  • the drainage device 6 includes a drainage pipeline 61 and a drainage pump 62 arranged on the drainage pipe 61.
  • the washer dryer 100 further includes a sensor 7 for detecting parameters related to an amount of water in the treatment tub 2.
  • the parameters related to the amount of water may be water inflow, a water level, a water pressure, and the like.
  • the sensor 7 may be installed in various positions. In an embodiment shown in FIG. 1 , the sensor 7 is installed on the bottom of the treatment tub 2. Specifically, a water pressure sensor may be used to obtain a relative height of the water level. In another implementation, a sensor for sensing a position of a horizontal plane may also be arranged in a position at a corresponding target water level on the tub wall of the treatment tub 2.
  • the washer dryer 100 further includes a circulating air duct 8. Both ends of the circulating air duct 8 are in communication with the treatment tub 2.
  • a heating device 1 and a blowing device 3 are arranged in the circulating air duct 8.
  • the circulating air duct 8 includes a heat exchange region 81, and a water supply device 5 is configured to spray water to a wall of the heat exchange region 81.
  • the water supply device 5 includes a first water supply device 51 and a second water supply device 52.
  • the first water supply device 51 has a great flow rate and is configured to flush lint attached to the heat exchange region 81 and a region below the heat exchange region.
  • the second water supply device 52 has a small unit flow rate. After the second water supply device is turned on, water may be provided for heat exchange with hot and humid air to dry laundry during drying.
  • the water supply device 5 may include only one water supply device.
  • the water supply device 5 may be located in another region and spray water to another part.
  • the water supply device may be located near the blowing device 3 to spray water to the blowing device 3, which may be configured to flush lint attached to the blowing device 3.
  • the water supply device may also be located near the heating device 1, or may be arranged along the tub wall of the treatment tub 2 to introduce water flow along the tub wall of the treatment tub 2, so as to provide, in a general drying program, water for heat exchange with the hot and humid air to dry the laundry.
  • the washer dryer 100 further includes a control device 10.
  • the heating device 1, the blowing device 3, the water supply device 5, and the drainage pump 62 may be controlled, so as to give various care to the laundry, such as washing, drying, and steam care.
  • a user-selectable steam care program is preset in the control device 10. After the steam care program is started, the control device controls the washer dryer 100 to operate and apply steam St to the laundry in the drum 4, so as to achieve effects such as wrinkle removal, sterilization, and deodorization on the laundry.
  • the steam care program may be independently run to give care to dry laundry placed in the drum 4, or may be run after another program such as a drying program, to achieve a better effect of wrinkle removal on the laundry or reduce a large number of wrinkles caused by the dried laundry that have not been taken out for a long time.
  • the method of controlling a washer dryer to give steam care to laundry includes at least the following steps.
  • Step I S 101 Cause a blowing device 3 to rotate at a first rotational speed to generate air flow in the circulating air duct 8, the air flow circulating in the circulating air duct 8 and the treatment tub 2.
  • Step II S102 Turn on and control a heating device 1, heat air flow passing through the heating device 1, and cause an air temperature downstream of the heating device 1 to reach a first temperature.
  • Step III S103 Turn on the water supply device 5, so that the water flow exchanges heat with the air flow heated by the heating device 1 and is at least partially evaporated into steam St.
  • the steam St flows through the laundry in the drum 4 with the air flow, thereby producing care effects such as wrinkle removal, sterilization, and deodorization on the laundry.
  • step III is followed by step IV S104 of causing the drum to rotate at a high speed.
  • the drum 4 is caused to rotate at a first rotational speed, where the first rotational speed is greater than or equal to a minimum dehydration rotational speed.
  • a preset dehydration rotational speed of a specific washer dryer 100 including the control step is between 800 revolutions per minute and 1200 revolutions per minute
  • the first rotational speed in step IV is set to at least 800 revolutions per minute.
  • the drum 4 may drive the air flow to flow when rotating at the foregoing rotational speed.
  • the air flow between the drum 4 and the treatment tub 2 pushes the water at the bottom of the treatment tub 2 to form a water film on a surface of the treatment tub 2.
  • the water film contacts the hot air and vaporizes to obtain the steam, which increases a way of generating steam and increases a steam concentration.
  • a level of water supplied by the water supply device 5 and finally entering the treatment tub 2 is detected after the water supply device 5 is turned on, and the drum 4 is caused to rotate at the first rotational speed when the water level reaches a first predetermined water level L1.
  • the first predetermined water level L1 is less than or equal to the water level of a water surface that exactly reaches an outer surface of the drum 4.
  • the level of water supplied by the water supply device 5 and finally entering the treatment tub 2 may be detected in a direct manner.
  • a sensor for sensing arrival of the water surface at a predetermined water level height position is arranged in the position on the tub wall of the treatment tub 2.
  • the water level may be detected in an indirect manner.
  • a pressure sensor is used to detect a water pressure in real time. The water pressure corresponds to a corresponding predetermined water level when reaching a predetermined magnitude.
  • the first predetermined water level L1 is less than or equal to the water level of the water surface that exactly reaches the outer surface of the drum 4, the water does not wet the laundry in the drum 4.
  • a preferred implementation is that the first predetermined water level L1 is set so that the water surface exactly touches the outer surface of the drum 4 or is very close to the outer surface of the drum 4. In this way, more water may be driven, and the water reaches a higher position on the surface of the treatment tub 2, thereby forming a water film with a larger area and providing a larger amount of steam.
  • the drum 4 switches to rotate at a second rotational speed after rotating at the first rotational speed for a first predetermined duration.
  • the second rotational speed is set to be less than the minimum dehydration rotational speed, and laundry may be rotated at the second rotational speed. It may be seen that the second rotational speed is less than a centrifugal rotational speed that causes the laundry to be attached to the drum, and the laundry may be rotated in the drum 4, so that all parts fully contact the steam, the laundry is looser as a whole, and wrinkles are reduced.
  • the second rotational speed may be obtained in advance through experiments.
  • the drum 4 is rotated in a single direction at the first rotational speed, and the drum 4 is rotated alternately in two directions at the second rotational speed.
  • the alternate rotation may better prevent laundry entanglement, so that the laundry is fully rotated and shaken loose.
  • the drum 4 may rotate only once at the first rotational speed, or the drum 4 may rotate alternately at the first rotational speed and the second rotational speed. If the drum 4 is rotated alternately at the first rotational speed and the second rotational speed, a duration of rotation at the first rotational speed is to be set shorter to reduce a possibility of wrinkles caused by centrifugal extrusion of the laundry against each other.
  • An advantage of intermittently rotating the drum 4 at the first rotational speed is that the water film is generated on the wall of the treatment tub 2, and a new water film is continuously generated after the water film is evaporated, thereby continuously generating steam in this manner.
  • the first temperature used in step II S102 is a highest safe temperature for fabrics.
  • the temperature may be obtained by using a temperature sensor 9 arranged downstream of the heating device 1 in an air flow direction shown in FIG. 1 .
  • the first temperature is set higher, so that a higher temperature is quickly obtained in a space where air flows, which improves evaporation efficiency.
  • the heating device 1 is controlled to reduce the air temperature downstream of the heating device 1 to a second temperature. In this way, more care may be given to the laundry, and the laundry may be prevented from being damaged due to a long-term high temperature.
  • a preferred embodiment further includes that after the water supply device 5 is turned on, the water supply device 5 is turned on and turned off at a preset frequency, and the blowing device 3 and the heating device 1 are kept on during turn-off of the water supply device 5.
  • water may form a water film on a surface of the circulating air duct 8 and/or the treatment tub 2.
  • circulating hot air may heat and evaporate the water film.
  • the water supply device 5 is turned on again to generate a new water film. In this way, water may be saved to avoid a waste of water caused by continuous water supply from the water supply device 5.
  • the water supply device 5 includes a first water supply device 51 with a great flow rate and a second water supply device 52 with a small flow rate. On this condition, only the first water supply device 51 is preferably turned on.
  • the water level in the treatment tub 2 may rise, which may result in water entering the drum 4 to soak the laundry in the drum 4. Therefore, after the water supply device 5 is turned on, the water level in the treatment tub 2 is detected in real time.
  • the water level reaches a second predetermined water level L2 the drainage device 6 is turned on to drain the water in the treatment tub 2.
  • the second predetermined water level L2 is less than a level of water that exactly reaches the outer surface of the drum 4.
  • the second predetermined water level L2 may be the same as the first predetermined water level L1.
  • a manner in which the water exactly reaches the outer surface of the drum 4 is only to be used in a scenario where the drum 4 is rotated at the first rotational speed.
  • the water surface is to be kept at a distance from the drum 4 to prevent the water from wetting the laundry in the drum 4.
  • the drainage device 6 When the drainage device 6 is turned on for a third preset duration, or when it is detected that the water level of the treatment tub 2 is less than or equal to a third predetermined water level L3, the drainage device 6 is turned off.
  • the third predetermined water level L3 is less than the first predetermined water level L1 and the second predetermined water level L2, and a relatively small parameter is to be selected.
  • the water supply device 5 when the water level reaches the second predetermined water level L2, the water supply device 5 is turned off after the drainage device 6 is turned on or while the drainage device 6 is being turned on.
  • the water level is less than or equal to the third predetermined water level L3, the water supply device 5 is turned on again.
  • the blowing device 3 and the heating device 1 are kept on.
  • the drainage device 6 is turned on and turned off at a predetermined frequency that prevents water from entering the drum 4, to drain the water in the treatment tub.
  • the predetermined frequency may be determined in advance by calculating water supply of the water supply device 5 or by experiments.
  • the foregoing process of generating the steam lasts for a set duration, or the duration of the foregoing process is adjusted based on a detected air humidity within the treatment tub 2 or the circulating air duct 8. Subsequently, in an embodiment, processes such as dehumidification, cooling, and maintenance are performed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP24174526.4A 2023-05-30 2024-05-07 Waschtrockner und verfahren zur steuerung des waschtrockners zur dampfpflege in den wäsche Pending EP4471202A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310624303.XA CN119083116A (zh) 2023-05-30 2023-05-30 洗衣干衣机及其对衣物进行蒸汽护理的控制方法

Publications (1)

Publication Number Publication Date
EP4471202A1 true EP4471202A1 (de) 2024-12-04

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Application Number Title Priority Date Filing Date
EP24174526.4A Pending EP4471202A1 (de) 2023-05-30 2024-05-07 Waschtrockner und verfahren zur steuerung des waschtrockners zur dampfpflege in den wäsche

Country Status (2)

Country Link
EP (1) EP4471202A1 (de)
CN (1) CN119083116A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007024056A1 (en) * 2005-08-25 2007-03-01 Lg Electronics Inc. A laundry machine and a method for operating the same
US20130198970A1 (en) * 2012-02-06 2013-08-08 Youngjin DOH Control method of laundry machine
CN113605037A (zh) * 2020-10-26 2021-11-05 松下家电(中国)有限公司 衣物护理设备的控制方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007024056A1 (en) * 2005-08-25 2007-03-01 Lg Electronics Inc. A laundry machine and a method for operating the same
US20130198970A1 (en) * 2012-02-06 2013-08-08 Youngjin DOH Control method of laundry machine
CN113605037A (zh) * 2020-10-26 2021-11-05 松下家电(中国)有限公司 衣物护理设备的控制方法

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