EP2895649B1 - Verfahren zum waschen von wäschestücken in einem programmgesteuerten hausgerät, sowie solches hausgerät - Google Patents

Verfahren zum waschen von wäschestücken in einem programmgesteuerten hausgerät, sowie solches hausgerät Download PDF

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Publication number
EP2895649B1
EP2895649B1 EP13756513.1A EP13756513A EP2895649B1 EP 2895649 B1 EP2895649 B1 EP 2895649B1 EP 13756513 A EP13756513 A EP 13756513A EP 2895649 B1 EP2895649 B1 EP 2895649B1
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EP
European Patent Office
Prior art keywords
temperature
wash liquid
washing
limit value
hot water
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.)
Active
Application number
EP13756513.1A
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German (de)
English (en)
French (fr)
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EP2895649A1 (de
Inventor
Christine Meissner
Kathrin Redlin
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP2895649A1 publication Critical patent/EP2895649A1/de
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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
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/06—Type or material
    • 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
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D06F34/24—Liquid temperature

Definitions

  • the invention relates to a method for washing items of laundry in a program-controlled domestic appliance for the care of laundry items, in particular a washing machine in which a washing liquid present in a tub heated, a washing temperature is set, laundry specific and / or device-specific parameters are detected and dependent on the parameters the heating of the washing liquid is performed to set a specific target temperature.
  • the invention also relates to a program-controlled domestic appliance for washing items of laundry by means of a washing liquid, comprising a suds container for holding the washing liquid, a regulator unit, a temperature sensor for detecting the temperature of the washing liquid, with at least one solenoid valve for opening and closing a water inlet and a heater for heating the washing liquid to a specific target temperature, wherein regulator unit is adapted to carry out such a method.
  • the publication EP 0 722 008 A2 shows a washing machine, wherein in a washing phase, a temperature of the washing liquid is heated approximately ramp-shaped. During the high heating, there are time intervals in which a heater for heating up the washing liquid is turned off, so that a temperature of the washing liquid slightly drops in these time intervals.
  • off DE 31 26 135 C1 a method for adjusting the lye temperature by means of a temperature measurement in a program-controlled drum washing machine known.
  • a method for controlling the temperature of mixed water, which is fed from separate cold and warm water supplies, and an apparatus for implementing the method is made of EP 1 683 904 A1 known. This method and apparatus are particularly applicable to program-controlled domestic appliances such as washing machines and dishwashers.
  • the washing of laundry items of a laundry item in a domestic appliance for the care of laundry items, in particular a washing machine is usually carried out in three phases.
  • a first phase a water inlet and a wetting of the introduced in a drum of a washing machine for washing laundry done.
  • this first phase also called net phase
  • the laundry which is located in the inner drum, with the washing liquid or the liquor, which is located in the tub of the washing machine, wetted.
  • heating takes place to the respective target temperature of the selected washing program.
  • a control of a heater is predominantly continuous. Only in certain programs or program modifications is an interruption of heating in this second phase. However, this leads in the majority of cases to a corresponding extension of the total washing time.
  • a third phase which is referred to as Nachwaschphase after reaching the target temperature, is carried out partly for a limited time reheating over a predefined hysteresis in the temperature control. In other cases, re-heating is ruled out once the target temperature has been reached.
  • the heating of the laundry item in the second phase and the possible reheating in the third phase are each indirectly via the liquor.
  • a heating device or a radiator is usually arranged in the lower part of the tub. The lye is heated by the radiator. When moving the drum, other items of laundry always come into contact with the heated liquor. Through the exchange between the free and the bound fleet, the heating of the laundry takes place.
  • a conditional improvement can be achieved in this context by a corresponding extension of the washing time, optionally with a reheating. However, this in turn leads to a user not desired significant extension of the washing time.
  • the inventive method for washing items of laundry in a program-controlled domestic appliance for the care of items of laundry is heated in a washing liquor present in a tub and set a washing temperature of the washing liquid.
  • laundry-specific and / or device-specific parameters in particular the temperature of the washing liquid, detected and carried out depending on the parameters, the heating of the washing liquid for setting a specific target temperature.
  • the method is characterized in that during a mesh phase in which the tub is supplied for washing the laundry laundry, a household heating device for heating the washing liquid is activated and is heated with the heater, the washing liquid to a net phase temperature which is smaller as the target temperature associated with a washing process selected by an operator.
  • the heater can be activated already in the mains phase, at the same time a hot water control is maintained. This is achieved by using the hot water to regulate the washing liquid to the target temperature and with the heating device only to a lower temperature, the mains phase temperature.
  • the feed would preferably take place via the hot water feed.
  • the mains phase temperature is set so that the mains phase temperature at the end of the mains phase is not quite reached when operating the household appliance with exclusive cold water supply.
  • the network phase is used optimally with regard to the introduction of heating energy in order to achieve even short program runtimes.
  • the domestic appliance is preferably for operation with different target temperatures, which can be selected by the operator depending on the desired wash cycle.
  • target temperatures which can be selected by the operator depending on the desired wash cycle.
  • the cold and hot water supplies depending on the temperature of the washing liquid.
  • the temperature of the washing liquid is set to the target temperature for which an upper limit and a lower limit are predetermined.
  • the heating of the laundry items is prioritized by the supply of hot water to the heater of the household appliance.
  • the upper and lower limits represent the limits of a hysteresis for the target temperature and are used to control the hot water and cold water supply.
  • washing liquid is supplied via the hot water supply, wherein the supply of washing liquid can be continued through the hot water supply until the temperature of the washing liquid has reached or exceeded the upper limit , that is, until a temperature of the washing liquid is determined to be greater than or equal to the upper limit.
  • washing liquid is supplied via the cold water inlet, wherein the supply of washing liquid can be continued through the cold water inlet until the temperature of the washing liquid reaches the lower limit or has fallen below, that is, until a temperature of the washing liquid is determined to be less than or equal to the lower limit.
  • the supply of further washing liquid can take place via the cold water inlet, even if the lower limit value has not been reached.
  • a hot water feed to a cold water feed and a fall below the lower limit value are switched from a cold water feed to a hot water feed.
  • such switching preferably does not take place during an active water feed, but only at the subsequent water feed. That is, when the temperature of the washing liquid exceeds the upper limit, a subsequent supply of washing liquid via the cold water inlet, or if the temperature of the washing liquid falls below the lower limit, there is a subsequent supply of washing liquid through the hot water inlet.
  • the mains phase temperature is less than the lower limit of the target temperature.
  • the net phase temperature is preferably dependent on the amount and / or the type of the introduced laundry items. This is particularly advantageous because the duration of the mesh phase is dependent on the load and the water absorption capacity of the laundry, since it is only completed when the required for the complete wetting of the laundry items amount of washing liquid and the additional desired free washing liquid supplied to the tub is.
  • the loading amount and / or before the start for example, from a weighing, or shortly after the first water supply known, the expected total amount of washing liquid and required to reach the target temperature energy can be estimated.
  • the object is also achieved by the program-controlled domestic appliance for washing items of laundry by means of a washing liquid, with a suds container for receiving the washing liquid, a regulator unit, a temperature sensor for detecting the temperature of the washing liquid, with at least one magnetic valve for opening and closing a water inlet and a heating device Heating the scrubbing liquid to a specific target temperature, wherein the control unit is electrically connected to the at least one solenoid valve and the heating device is connected, wherein the control unit is adapted to drive the heating device and is further adapted to activate the heater during a net phase, which is designed for wetting the laundry items by the supply of washing liquid and with the heater To heat wash liquid to a net phase temperature which is less than a target temperature associated with an operator selected washing process.
  • Such a domestic appliance can be developed advantageously by comprising at least one separate cold and one hot water inlet and the controller unit is further adapted to drive the solenoid valves of the cold and hot water feeds.
  • the regulator unit is preferably set up to adjust the temperature of the washing fluid to the target temperature for which an upper limit value and a lower limit value are predetermined during the network phase. This is achieved in that the regulator unit allows opening and closing of the solenoid valves (17, 18) depending on the temperature (T) of the washing liquid (6) by the regulator unit (16).
  • the domestic appliance preferably has a program control.
  • the controller unit may be included in this program control or incorporated as a separate unit in the domestic appliance.
  • the washing temperature in particular by the regulator unit, thus specifically adapted to the current individual situation of the washing process, thereby enabling an improved washing process.
  • the wash temperature to be controlled and the heating process are adapted to previously acquired state variables or to the adjustment variables of the washing process selected by an operator.
  • the times for achieving the average washing temperature can be shortened in a targeted manner and thereby also realize shorter washing programs.
  • better uniformity the washing process can be achieved and improved washing performance can be made possible even with very different items of laundry and relatively high loads.
  • the energy input to be provided in particular by the heating of the household appliance for setting a mean washing temperature is determined.
  • the required energy input is generated in particular by appropriate control of the heater in at least two different phases, in particular depending on the progress of the selected wash program, with predefined temperature peaks.
  • the loading quantity and / or the absorbency of the laundry items are preferably detected, in particular with suitable, basically known sensor systems assigned to the program control and / or the controller unit.
  • suitable, basically known sensor systems assigned to the program control and / or the controller unit.
  • a washing machine 1 in a housing 2 to a tub 3, in which a laundry drum 4 is rotatably supported by a shaft 5 and driven by a drive unit, not shown.
  • the laundry drum 4 is charged with laundry items 7 via a filling opening (not shown).
  • About a hot water inlet 8 is hot water and a cold water inlet 9 cold water is a Einêt Anlagen10, in particular a Waschstoffein Kunststoff Road supplied.
  • This is the output side connected via a supply line 11 with the tub 3.
  • the hot and cold water inlet is connected on the input side to a domestic water supply.
  • the temperature of the hot and cold water depends on the ambient conditions of the domestic water supply.
  • the warm water has a temperature between 50 ° C and 60 ° C.
  • a temperature sensor 12 which is preferably mounted in the vicinity of the bottom of the tub 3, measured temperature of the laundry through the supply line 11 warm or cold water via one of the two water inlets 8 or 9 initiated.
  • the temperature of the washing liquor is obtained as a signal quantity x in a transducer assigned to the temperature sensor 12.
  • the washing machine 1 has a pressure sensor 13, with which a further signal is obtained via a further transducer, which signal is proportional to the height of the washing liquid supplied to the tub 3.
  • These signals are fed to a regulator unit 16.
  • the sensors 12 and 13 or their transducers are electrically connected via lines to the regulator unit 16.
  • the signals can also be supplied to a program control 15 comprised by the washing machine 1. This is particularly advantageous if the regulator unit 16 and / or the transducers of the sensors 12 and 13 are integrated in the program control 15.
  • a reference variable is formed from the temperature signal x and the pressure signal.
  • the reference variable is the size whose value, ie the setpoint, the Task size under fixed conditions.
  • the control unit 16 generates signal quantities, due to the solenoid valves 17, 18 are opened or closed to supply from the cold or hot water inlet 8, 9 washing liquid 6 the desired temperature via the supply line 11 to the tub.
  • the regulator unit 16 can turn on and off the heater 19, which only takes place when with the supply of hot water through the hot water inlet 8 a set for the heater 19 temperature, in this case the mains phase temperature Tn is not reached. This is the case when the washing liquid 6 supplied via the hot water connection 8 does not yet have a sufficiently high temperature.
  • the heating device 19 is also connected to the program control unit 15 or to the control unit 16 via a signal line. That is, in the case of operation of the washing machine 1 with a cold and hot water supply, the heater 19 is an additional device, with the additional heat energy of the washing liquid 6 can be supplied.
  • the washing machine 1 may also be connected only via a cold water inlet 9 with a domestic water supply.
  • the control unit 6 exclusively controls the heating device 19, which is why heat energy is then supplied to the washing liquid only by means of the heating device 19. That is, the controller unit 6 can be used both for a washing machine with exclusively cold water inlet as well as for a washing machine 1 with cold and hot water inlet 8, 9.
  • FIG. 2 an example of a diagram of a program sequence is shown, wherein the rotational speed of the laundry drum 4 (solid line z) and the amount of washing solution supplied to the tub 3 (dashed line y) are shown over the time t.
  • a wash program sequence is divided into several phases.
  • the network phases A1, A2 which are defined by the fact that water is supplied to the tub for wetting the laundry items during these phases, and a subsequent washing phase B shown.
  • the network phases A1 and A2 differ in that the heater 19 is not activated in the network phase A1 and is activated in the network phase A2. Only if the heater is activated, this can be switched on and off.
  • washing liquid 6 In the course y of the amount of washing liquid 6 rising and constant sections can be seen. During a rising portion, a water inlet 8 or 9 is opened and washing liquid 6 is supplied to the tub. In the washing phase B, the temperature T of the washing liquid 6 is always brought to the target temperature Tz by means of the heating device 19.
  • the duration of the net phase A1 can be predetermined in time, or be dependent on the supplied washing liquid 6, in order to ensure that the heating device is also covered with washing liquid.
  • the laundry drum 4 is operated in the network phases A1 and A2 with a speed optimized for the network, for example 25 1 / min. This speed is particularly with respect to the laundry drum 4 arranged, and not shown scooping, the washing liquid 6 transported from the bottom of the tub 6 in the upper tub area so that they can rain from there on the laundry items 7.
  • the laundry drum 4 is driven at a speed which is greater than in the mains phase, for example at 50 l / min. With the higher speed, a larger washing mechanism is introduced into the laundry items 7.
  • the Fig. 3 shows a profile of the temperature T (solid line x) and the amount of supplied washing liquid M (dashed line y) over the time t shown in the inventive method during a mains phase A1 and A2 in an operation of the washing machine 1 with exclusively cold water inlet.
  • cold water from the domestic supply network is supplied to the tub 3 via the cold water inlet 9.
  • the heater 19 is turned on by the regulator unit 16, shown with the dotted line.
  • the temperature T decreases only a little from, while the washing liquid 6 is reheated by the switched-heater 19 during the water inlet.
  • the mains phase temperature Tn has been selected such that the heating device 19 remains switched on during the entire mains phase A2.
  • the temperature T of the washing liquid 6 is further heated to the target temperature Tz between the limits Tz-max and Tz-min.
  • the operation of the washing machine 1, which includes a cold and hot water connection 8, 9 explain. It shows the Fig. 4 a profile of the temperature T of the washing liquid 6 (solid line x) and the amount M of supplied washing liquid 6 over the time t for a method known from the prior art during the network phases A1 and A2.
  • the cold and hot water supplies and as well as the heater are controlled such that both by means of cold and hot water control as well as by means of temperature control, the washing liquid 6 during the network phases A1 and A2 already the target temperature Tz within the limits Tz-max and Tz-min can reach. This means that the heating device can remain switched on until reaching the upper limit Tz-max.
  • washing liquid 6 is supplied to the tub above the hot or cold water inlet in section I.
  • the heater remains off since it is not activated in the mains phase A1.
  • the temperature drops slightly again, since the washing liquid 6 are also cooled by the colder items of laundry 7 and the components of the washing machine.
  • washing liquid 6 is again supplied to the tub over the hot water inlet, since the target temperature Tz has not yet been reached.
  • the network phase A2 begins, in which the heater is activated.
  • the heater is turned on immediately, since the target temperature Tz has not yet been achieved with the hot water supplies I and II.
  • the washing liquid 6 is heated to a temperature Tz-max by means of the heating device, for which reason the heating device is switched off. Since the upper limit Tz-max of the target temperature Tz has already been reached, the next water inlet in section IV is made via the cold water inlet, the heater being switched on again as soon as the lower limit Tz-min is reached. Accordingly, it may happen that all subsequent water supplies only via the cold water inlet, since the heater already sufficiently heated the washing liquid to a value above the limit Tz-max.
  • the heater 19 within the network phase A2 only turned on when the washing liquid 6, the mains temperature Tn, the below the lower limit Tz-min is not yet reached.
  • the washing liquid is supplied to the tub 3 via the hot water inlet 8 in the sections I and II, wherein during the section II, the heater 19 is turned on only briefly within the section V until reaching the mains phase temperature.
  • the heating device 19 does not have to be switched on at all.
  • the forms of representation of the lines and sections as in the Fig. 4 has been chosen.
  • FIGS. 4 and 5 clearly shows that in the inventive method, the heater 19 is only briefly turned on. Thus, compared to the known method significantly additional heating energy can be saved, the same process can be used in washing machines with only one cold water inlet without impairment.
  • the mains phase temperature Tn can also be dependent on the loading amount and the type of the laundry items.
  • the cold and hot water valves 17, 18 can be switched immediately upon reaching the upper or lower limit Tz-max, Tz-min, so even during a water supply.

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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)
  • Cleaning By Liquid Or Steam (AREA)
EP13756513.1A 2012-09-17 2013-09-05 Verfahren zum waschen von wäschestücken in einem programmgesteuerten hausgerät, sowie solches hausgerät Active EP2895649B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012018233 2012-09-17
DE102012023084.2A DE102012023084A1 (de) 2012-09-17 2012-11-26 Verfahren zum Waschen von Wäschestücken in einem programmgesteuerten Hausgerät, sowie solches Hausgerät
PCT/EP2013/068367 WO2014040905A1 (de) 2012-09-17 2013-09-05 Verfahren zum waschen von wäschestücken in einem programmgesteuerten hausgerät, sowie solches hausgerät

Publications (2)

Publication Number Publication Date
EP2895649A1 EP2895649A1 (de) 2015-07-22
EP2895649B1 true EP2895649B1 (de) 2016-07-20

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EP13756513.1A Active EP2895649B1 (de) 2012-09-17 2013-09-05 Verfahren zum waschen von wäschestücken in einem programmgesteuerten hausgerät, sowie solches hausgerät

Country Status (6)

Country Link
EP (1) EP2895649B1 (pl)
CN (1) CN104704156B (pl)
DE (1) DE102012023084A1 (pl)
PL (1) PL2895649T3 (pl)
RU (1) RU2615061C2 (pl)
WO (1) WO2014040905A1 (pl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013225113B4 (de) * 2013-12-06 2019-01-31 BSH Hausgeräte GmbH Verfahren zur Behandlung von Wäsche mit verbesserter Benetzungsphase und hierzu geeignete Waschmaschine
CN105862320B (zh) * 2016-05-19 2018-04-20 无锡小天鹅股份有限公司 洗衣机的洗涤控制方法和洗衣机
CN106120244B (zh) * 2016-08-25 2019-02-12 北京小米移动软件有限公司 洗涤方法和装置
DE102017219042A1 (de) * 2017-10-25 2019-04-25 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung
DE102017219043A1 (de) * 2017-10-25 2019-04-25 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3126135C1 (de) 1981-07-02 1982-10-28 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum Einstellen der Laugentemperatur mittels einer Temperaturmessung in einer programmgesteuerten Trommelwaschmaschine
IT1282406B1 (it) * 1995-01-05 1998-03-23 Zanussi Elettrodomestici Lavabiancheria o lavastoviglie con programmi di lavaggio perfezionati
DE19611089C2 (de) * 1996-03-21 2001-09-27 Aeg Hausgeraete Gmbh Waschverfahren für eine programmgesteuerte Trommelwaschmaschine
CN1082582C (zh) * 1997-04-23 2002-04-10 安东尼奥·马洛尼股份公司 洗涤方法和实施上述洗涤方法的洗衣机
DE19730422A1 (de) * 1997-07-16 1999-01-21 Aeg Hausgeraete Gmbh Verfahren zum Benetzen von Waschgut in einer programmgesteuerten Trommelwaschmaschine
DE19906723C5 (de) 1999-02-18 2008-07-31 AEG Hausgeräte GmbH Verfahren zum Waschen von Wäsche in einer programmgesteuerten Waschmaschine
DE102005003451A1 (de) 2005-01-25 2006-07-27 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und Vorrichtung zur Regelung der Temperatur von Mischwasser
KR20070078320A (ko) * 2006-01-26 2007-07-31 삼성전자주식회사 세탁기 및 그 제어방법
DE102007002184B4 (de) * 2007-01-15 2018-03-15 BSH Hausgeräte GmbH Verfahren zum Waschen von Wäschestücken in einem programmgesteuerten Hausgerät, sowie solches Hausgerät
DE102007037159B4 (de) * 2007-08-07 2014-03-27 Miele & Cie. Kg Verfahren zum Waschen von Wäsche in einer Waschmaschine
DE102008046465A1 (de) * 2008-09-09 2010-03-11 Miele & Cie. Kg Verfahren zum Betreiben einer Waschmaschine und Waschmaschine
EP2503044B1 (en) * 2011-03-24 2013-12-11 Electrolux Home Products Corporation N.V. A method for performing a washing cycle of sensitive laundry in a washing machine or in a washer-dryer

Also Published As

Publication number Publication date
WO2014040905A1 (de) 2014-03-20
PL2895649T3 (pl) 2017-01-31
RU2015108919A (ru) 2016-11-10
DE102012023084A1 (de) 2014-03-20
EP2895649A1 (de) 2015-07-22
CN104704156A (zh) 2015-06-10
RU2615061C2 (ru) 2017-04-03
CN104704156B (zh) 2017-03-15

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