EP2055820B1 - Dampferzeugungsverfahren und Vorrichtung zur Behandlung - Google Patents

Dampferzeugungsverfahren und Vorrichtung zur Behandlung Download PDF

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Publication number
EP2055820B1
EP2055820B1 EP08022313.4A EP08022313A EP2055820B1 EP 2055820 B1 EP2055820 B1 EP 2055820B1 EP 08022313 A EP08022313 A EP 08022313A EP 2055820 B1 EP2055820 B1 EP 2055820B1
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EP
European Patent Office
Prior art keywords
steam
air
temperature
storage compartment
humidity
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
EP08022313.4A
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English (en)
French (fr)
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EP2055820A1 (de
Inventor
Hans-Joachim Klug
Thomas Loy
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Electrolux Home Products Corp NV
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Electrolux Home Products Corp NV
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
Priority claimed from EP06009016A external-priority patent/EP1852540B1/de
Priority claimed from EP06009015A external-priority patent/EP1852542B1/de
Priority claimed from EP06009014A external-priority patent/EP1852539B1/de
Priority claimed from EP06011420A external-priority patent/EP1852541B1/de
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP08022313.4A priority Critical patent/EP2055820B1/de
Publication of EP2055820A1 publication Critical patent/EP2055820A1/de
Application granted granted Critical
Publication of EP2055820B1 publication Critical patent/EP2055820B1/de
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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
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/44—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of conditioning or finishing, 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/02—Characteristics of laundry or load
    • D06F2101/04—Quantity, e.g. 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/02—Characteristics of laundry or load
    • D06F2101/06—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
    • 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
    • D06F2103/08—Humidity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/34—Humidity
    • 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
    • D06F2105/16—Air properties
    • D06F2105/24—Flow or velocity
    • 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
    • D06F2105/32—Air flow control means
    • 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
    • D06F2105/38—Conditioning or finishing, e.g. control of perfume injection
    • 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
    • D06F2105/50—Starting machine operation, e.g. delayed start or re-start after power cut
    • 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
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity

Definitions

  • the invention relates to a method of supplying steam into a fabrics storage compartment of a laundry treatment device, and a treatment apparatus having a control unit controlling the steam supply to the fabrics storage compartment.
  • a steam evaporating device is arranged in an air channel for supplying the circulated air into a drum.
  • the heat of a heater normally used for heating the circulated air heats and evaporates water which is supplied into a cup located in the air channel.
  • a fan in the circulation channel is operated such that the steam is blown from the channel into the drum.
  • the efficiency of the steam supply is lowered in that the air is circulated through the drum such that a portion of the steam introduced into the drum is again flown out of the drum into the exit channel where it then may condensate at a condenser and other elements in the air passages.
  • the steam generated in the air channel can condense and inhomogeneously cool down at or close to the channel walls and the backside of the drum wall prior or during inlet into the drum.
  • US 5,228,211 discloses a method and apparatus for energy efficient drying. Damp items are loaded into a compartment. Subsequently air heated by a heat source is circulated by a fan through the compartment and circulation ducts. Due to the circulation of the hot air the moisture of the items is evaporated, i.e. steam is generated. The steam is removed by the air circulation and condenser at a condenser.
  • EP 1 666 655 discloses an apparatus and method for eliminating wrinkles in clothes in a washing or drying machine using steam to eliminate the wrinkles in clothes, in a state in which the clothes are worn by a user or stored, as well as in a state in which washing of the clothes is terminated.
  • the method includes determining whether or not a wrinkle-eliminating course is selected; supplying hot air to the clothes to eliminate dust from the clothes when it is determined that the wrinkle-eliminating course is selected; and supplying steam to the clothes, from which the dust was eliminated, to eliminate the wrinkles in the clothes.
  • wrinkles may form due to different elasticity of the fabrics being non-uniformly dampened, partially overheating of the fabrics with the hot droplets, decoloration effects, different efficiencies of additives added to the steam treatment and the like may result.
  • the processing conditions in the storage compartment are directly or indirectly monitored and the steam supply parameters are adapted in dependency of the monitored internal conditions for droplet prevention.
  • a steam supplying method in which the steam is supplied into a fabrics storage compartment of a treatment apparatus.
  • the treatment apparatus is for example a dryer or a washing machine providing refreshment functionality or any other treatment apparatus having a storage compartment through which air, preferably drying air, is ventilated.
  • the steam supplying method can for example be implemented as a subroutine of a refreshment cycle, an anti-crease cycle during a drying procedure, or an anti-crease phase after the drying of the laundry stored in the storage compartment'.
  • the steam is supplied directly into the storage compartment. This means that the steam injection is made at a location having a direct and contact-free path from the point of injection to the storage compartment's inner volume.
  • the steam may be supplied indirectly into the storage compartment, for example by injecting the steam into an air guiding channel connected to the storage compartment.
  • the air or drying air is blown through the storage compartment until a predefined temperature and/or humidity has been achieved.
  • a predefined temperature and/or humidity is achieved.
  • the air in particular drying air
  • the air passed through the storage compartment or circulated through the storage compartment, and elements in contact with the circulated or injected air are heated up to a predefined temperature.
  • the air temperature is the most relevant parameter in this case.
  • the predefined temperature is somewhat above typical ambient temperatures, for example about 35, 40 or 50°C.
  • the humidity of the air within the storage compartment and/or the humidity of the laundry is set to a predefined humidity level, for example a residual or relative humidity of 3%, 5% or 10%.
  • a predefined humidity level for example a residual or relative humidity of 3%, 5% or 10%.
  • the predefined temperature and the predefined humidity are both set by the pre-drying process, as the steam condensation behavior depends on the air temperature as well as on the (already existing) air humidity.
  • the air ventilated through the storing compartment may be heated or cooled or neither nor (air with ambient or internal temperature is ventilated).
  • Air heating is effected by activation of a heating device.
  • Cooling is effected by activating a cooling device like a condenser (e.g. used in a condenser air dryer) and/or cold ambient air from outside the treatment apparatus is sucked into the treatment apparatus - at least partially forming the ventilated air.
  • the steam supply is continued wherein the steam flow and/or the temperature of the steam is set in dependency of at least one process parameter.
  • the steam supply is not continued with the predefined flow and/or temperature, but the flow and/or temperature is adjusted according to the current operation process parameters which may vary after having started the steam supply process.
  • the steam flow and/or the temperature are correspondingly adapted in reaction thereto such that the effect of avoiding the droplet formation during the steam supply is maintained even over a longer period of steam supply.
  • a steam supply period lasts for example longer than one minute, two minutes, or lies in a range of three to seven minutes.
  • claim 1 of the present application also provides the effects and advantages of claim 2 of the earlier European patent application EP 06 015 884.7 , while according to claim 1 of the present application it is not necessary that the steam supply sequence is started at a predefined temperature and/or humidity in the storing compartment.
  • the steam supply may be started with a very low steam supply rate which inherently avoids the risk of forming droplets, and then the steam supply flow rate can be increased in reaction to the detected process parameters allowing a higher steam flow rate.
  • the steam supply sequence is started at a low level or from a zero steam flow rate and is successively increased to a predefined steam flow rate. Thereafter the steam flow rate is preferably adjusted according to present claim 1.
  • the process parameters relevant for setting the steam flow and/or the temperature of the steam are one or more the following:
  • the approach to the predefined temperature or generally the current air temperature is detected in the storage compartment as the most relevant measurement location having an effect onto the steam condensation.
  • the air temperature is detected at a surface or a wall of the air guiding and enclosing walls of the apparatus or fabrics storage compartment.
  • the air temperature is detected at the storing compartment's surface or wall (e.g. drum wall).
  • the temperature can be measured in an air flow path or in an air circulation path or also preferably at a location close to the injection point for the steam supply.
  • the air humidity is preferably detected at the same locations as the air temperature detection locations.
  • the humidity is detected together with the temperature (at the same location), such that there is a direct correlation between the temperature and humidity at one location.
  • the humidity of the air is derived from the humidity detection of the laundry which is often implemented by an electrical conductivity measurement at the inner walls of the drum.
  • the values of the temperature and/or humidity for observing the approach to the predetermined temperature and/or predetermined humidity for adjusting the steam supply in dependency of these process parameters are preferably detected or monitored periodically, permanently, intermittently or the like, such that the progress or changes in the process parameter conditions (e.g. temperature/humidity) can be steadily used to correct and optimize the steam flow and/or temperature. This is correspondingly valid for the other process parameters, if changing over time, and is considered for determining the steam flow and/or temperature.
  • the predetermined steam flow rate (preferably also or alternatively the predetermined temperature) is calculated on the basis of the predefined air temperature and the predefined air humidity using the below formula for calculating the dew point.
  • additional parameters are considered (which can partially be determined by experiments) in calculating or determining the predetermined flow rate (and the predetermined temperature), like the laundry weight, the drum volume, the temperature drop during transport of the steam from the steam supplying device to the injection point, the drum rotation speed and the like.
  • the steam flow (and preferably also the steam temperature) are calculated on the basis of the detected air temperature and detected air humidity (the most relevant process parameters) the same way as for claims 1 and 16 of the European patent application EP 06 015 884.7 .
  • T d temperature in degrees Celsius
  • RH is the relative humidity as a fraction (not percent)
  • the setting of the steam flow and/or the temperature of the steam supplied to the compartment in dependency of the drying process parameter(s) can be used for example for maximizing the steam flow up to a limit below the condensation or droplet forming such that due to the high steam flow rate the time required to supply a predefined steam amount into the compartment is reduced.
  • the temperature of the steam is minimized, for example, to reduce energy consumption during steam generation and/or to treat delicate textiles with steam at as low temperature as possible.
  • the steam flow rate and/or the temperature of the steam is adapted or set by setting a supplying flow rate of liquid to a first heating device of the steam generator.
  • the heating activity of the steam generator is adapted in dependency of the predefined temperature and/or humidity or the monitored temperature and/or humidity during the steam supply sequence. For example, the liquid flow rate to the steam generator is increased to increase the steam flow rate while at the same time the heating power is increased to maintain the steam supply at a constant steam temperature.
  • the temperature of the steam can be monitored and the steam temperature signal can be used in a closed-loop configuration to adjust the heating and evaporation of the liquid for steam generation in dependency of the current steam temperature signal.
  • Steam temperature is for example detected within the steam generator (steam supplying unit), at a pipe guiding the steam from the steam generator to the injection location, in or at a nozzle injecting the steam, or a combination of temperatures measured at these temperature detection locations.
  • the air flow through the storage compartment is reduced or stopped such that the steam is not exhausted out of the storing compartment during air circulation or ventilation. This also avoids steam condensation outside the storage compartment.
  • the duration of steam supply and/or the total amount of steam supplied to the drum is set in dependency or is dependent of the process parameters, preferably the air temperature and/or the air humidity.
  • the duration and/or steam amount may be set at the beginning of the steam supply phase, or preferably it is adjusted under continued monitoring of the process parameters which gives an indication when the steam treatment has reached a predetermined end level.
  • the air temperature is allowed only to increase to a predetermined level during steam supply to avoid damages to the fabrics (e.g. the predetermined temperature level itself depends on the fabrics type).
  • a maximum air or laundry humidity represents an end point for steam supply.
  • the treatment apparatus according to claims 13 is provided with a control unit which is adapted to control or operate the treatment apparatus such that the effects described above in relation to the method claims are fully applicable also for the operation of the treatment apparatus using the respective functional components of the treatment apparatus.
  • Fig. 1 schematically shows some functional elements of a tumble dryer 2.
  • the laundry to be treated or dried is stored in a drum 6 driven by a motor 4 via a belt 8.
  • Rotational speed and rotation direction of the motor 4 can be controlled by a control unit 50 (CPU) shown in Fig. 2 .
  • the motor rotation is coupled via a freewheel 10 to a fan 12 arranged in an inlet channel 14 for blowing air into the drum 6 in a forward rotation direction of the motor 4.
  • the freewheel decouples the fan shaft from the motor shaft such that the fan 12 is not driven.
  • the loading side of the drum 6 is connected to an outlet channel 16 wherein the exhaust air first passes a fluff filter 18 before entering into the outlet 16.
  • the tumble dryer 2 When operating in condenser mode, the air from the outlet channel 16 is passed through a condenser 20 from where the circulated air is further guided through a heater 21 and then it is passed to the inlet channel 14.
  • the tumble dryer 2 can be switched from a condensation mode, where the air is circulated in channels 14, 16 and drum 6, and an exhaust mode, where fresh air is sucked in through an intake channel 24 and the humidity laden air is exhausted through exhaust channel 22.
  • Switching between condensation mode and exhaust mode is made by switching valve 26 under the control of the control unit 50. Any intermediate position between the two modes of circulation and condensation can also be switched to by correspondingly adjusting the position or alignment of a valve element 28 within the valve body 26. I.e.
  • the condensation exclusive mode is achieved in position II of the valve element
  • the exhaust exclusive mode is achieved in position III of the valve element 28
  • a mixed mode is achieved in position I of the valve element 28.
  • the valve 26 could also be positioned between the condenser 20 and the heater 21.
  • the humidity of the laundry in the drum is detected by a humidity sensor 30 which is formed as a conductivity sensor.
  • the conductivity sensor detects the electrical conductivity of the laundry between two metallic contacts at the drums inside which are spaced from each other.
  • the air humidity of the air flown through the drum 6 can be detected at another position in the air passage, for example at a location close to or at the fluff filter 18.
  • a second temperature sensor 44 is arranged at the loading opening of the drum to detect the temperature of the air within the drum. As shown, the temperature measure point is close to a nozzle 36 of an additive injector 32.
  • the additive injector 32 generates water steam which is supplied via supply line 34 to the nozzle 36 such that a steam jet 38 is injected into the drums inside.
  • a pump 40 assigned to the additive injector 32 pumps water from a water reservoir (not shown) into the additive injector 32 in which a heating element 42 is arranged to evaporate the water.
  • the power dissipated by heating element 42 is also controlled by control unit 50 such that steam flow rate and/or steam temperature are controlled by correspondingly setting the temperature within the additive injector 32 by heating the heating element 42 and by pumping a controllable flow of water into the additive injector 32 where the water is brought into contact with the heating element 42.
  • the temperature within the additive injector 32 is detected close to the heating element 42 by a first temperature sensor 41.
  • the steam temperature is detected with an additional temperature sensor within the steam supply pipe 34 or temperature signal of the sensor 44 is taken as the steam temperature during steam supply phases (while it is e.g. taken as an air temperature signal in non-steam supply phases).
  • the steam temperature signal thus detected is also supplied to the control unit 50 and processed there to adjust the steam temperature either by taking this signal exclusively to control operation the heating element 42 and thereby the steam temperature, or it is taken as a correction signal together with the temperature signal from the first temperature sensor 41 ( Fig. 2 ) to control the operation of heating element 42.
  • Fig. 2 shows a block diagram of functional elements partially already shown in Fig. 1 .
  • the CPU 50 is connected to an input panel 52 and a display section 54, wherein the user can input program options and selections at the input panel 52. For example a refreshment program including or excluding a program option for an anti-crease phase may be selected. Also, a user input can be made whether the drying program or refreshment program should start with dry or with damp laundry. Further, the type of textiles can be input and also a weight, for example in form of a volume input by selecting between full, medium or low loaded drum.
  • the CPU 50 controls the operation of motor 4, heater 21, valve 26 and additive injector 32.
  • Selected programs and program options can be indicated at the display section 54 under the control of the CPU 50.
  • Also operating states of the dryer are indicated in the display section, for example the remaining time until finishing the program or the like.
  • Figs. 1 and 2 only show some of the functional elements and control and sensing paths which are additionally used in dryers.
  • the subunit 56 receives and processes the signals of the first and second temperature sensors and the humidity sensor 30.
  • a look-up memory 56a connected to the subunit 56 optimization patterns are deposited such that, by using the corresponding signals from sensors 30, 41 and 44, an optimum steam flow rate and temperature for supplying the steam into the drum 6 from the additive injector 32 is calculated.
  • the 'calculation' means retrieval from look-up memory 56a storing a look-up table.
  • the temperature and steam flow rate are adjusted by providing from the subunit 56 to the CPU 50 control signals which are forwarded to the pump 40 and the heating element 42.
  • the steam flow rate essentially depends on the heating power developed by heating element 42 and the pumping rate of pumping water by pump 40 to the heating element 42.
  • the steam temperature is a function of the heating power and the fluid flow rate generated by pump 40.
  • the heating element 42 is switched off such that the temperature in the additive injector 32 decreases as detected with the first temperature sensor 41.
  • the temperature falls to lower temperature T3 which lies at a lower temperature limit Tmin whereupon the heating element 42 is activated again and the temperature rises again up to Tmax.
  • the threshold value T1 as well as the lower and the upper limits Tmin, Tmax itself are not fixed, but one, two or all three dependent on the processing conditions for processing the laundry. Together with adapting these (one, two or three) temperatures in dependency of the process parameters, the liquid flow rate generated by pump 40 is adapted such that the formation of droplets in the drum or at the nozzle 36 are avoided when the steam jet 38 is injected into the drum 6.
  • dew point conditions are stored in look-up memory 56a, wherein on the basis of the detected air temperature (second temperature sensor 44) and the humidity (humidity sensor 30) an optimized pumping flow rate (pump 40) and heating power or temperature (e.g. temperature limits Tmin, Tmax) of the additive injector 32 (first temperature sensor 41) is adjusted and controlled such that finally an optimized steam temperature and steam flow rate of the steam exiting the nozzle 36 is effected - avoiding the formation of droplets.
  • the starting conditions for supplying the steam from the additive injector 32 into the drum are selected such that droplet suppression is also achieved from the beginning.
  • a predefined condition in the drum is effected, for example by heating the air in the drum 6 to a predefined temperature and at the same time by pre-drying the laundry (if damp) to a predefined starting humidity (which can be detected either via the laundry's humidity or the air humidity).
  • a predefined starting humidity which can be detected either via the laundry's humidity or the air humidity.
  • the threshold temperature T1 for starting fluid supply to the heating element 42 is selected in dependency of the current conditions in the drum (air temperature and/or humidity) and also the upper and lower two-point control values Tmax and Tmin are selected in dependency of the initial conditions (temperature and/or humidity) in the drum 6. This means that by either way the risk of droplet forming in the starting phase of steam supply is significantly reduced.
  • the operation conditions for the additive injector 32 are also optimized to avoid condensation within supply pipe 34 or at the nozzle 36 or inside the drum 6 at cold inner walls. The latter is avoided by the above mentioned pre-heating of the air via heater 21 and thereby pre-heating the laundry and also the drum material. Even if the air circulation is maintained during the steam supply phase, the steam parameters (temperature/flow rate) can be selected such that an adverse condensation rate at the condenser or heater 21 is avoided.
  • the adaptation of the steam generation parameter in dependency of the processing conditions also takes into consideration deviations from identical processing runs, if for example an exhaust air mode is selected and ambient air with high humidity and high temperature is sucked and blown through drum 6.

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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)
  • Processing Of Solid Wastes (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (24)

  1. Dampfzuführungsverfahren zur Zuführung von Dampf (38) in ein Textilienaufbewahrungsfach (6) einer Behandlungsvorrichtung (2), insbesondere eines Trockners, einer Auffrischungsvorrichtung oder einer Waschmaschine mit Trocknerfunktion, wobei die Behandlungsvorrichtung (2) eine Dampferzeugungseinheit (32) umfasst,
    dadurch gekennzeichnet, dass
    nachdem die Dampfzuführung gestartet wurde die Dampfströmung und/oder die Temperatur des Dampfes (38), der von der Dampferzeugungseinheit (32) generiert und dem Aufbewahrungsfach (6) zugeführt wird, in Abhängigkeit von wenigstens einem Prozessparameter eingestellt werden, der nach dem Start des Dampfzuführungsprozesses variieren kann, wobei der wenigstens eine Prozessparameter wenigstens einer ist aus der Gruppe Luftfeuchtigkeit; Feuchtigkeit der Textilien; Lufttemperatur; Temperatur der Oberfläche oder der Wand des Aufbewahrungsfaches (6), insbesondere eine Trommeloberflächentemperatur; Temperatur eines den Dampf (38) der Einspritzstelle (36) zuführenden Rohres; eine Luftströmung durch das Aufbewahrungsfach (6) und eine Rotationsgeschwindigkeit einer das Aufbewahrungsfach (6) bildenden Trommel.
  2. Verfahren gemäß Anspruch 1, welches nach dem Einstellen der Dampfströmung und/oder der Temperatur des dem Aufbewahrungsfach (6) zugeführten Dampfes (38) in Abhängigkeit von wenigstens einem Trockenprozessparameter das Beenden der Dampfzuführung in Abhängigkeit von wenigstens einem Prozessparameter umfasst.
  3. Verfahren gemäß Anspruch 1 oder 2, wobei die vordefinierte Temperatur und/oder die Lufttemperatur die Temperatur ist, die an wenigstens einer der folgenden Stellen festgestellt wird:
    im Aufbewahrungsfach (6); in einem Luftkanal (14), der die Luft dem Aufbewahrungsfach (6) zuführt; in einem Luftkanal (16), der die Luft aus dem Aufbewahrungsfach (6) abführt; in der Nähe oder an einer Einspritzstelle (36) zum Einspritzen des Dampfes (38) in die Luft und/oder das Aufbewahrungsfach (6); die Temperatur der Oberfläche oder Wand des Aufbewahrungsfaches (6), insbesondere eine Trommeloberflächentemperatur; und die Temperatur eines Rohres, das den Dampf (38) der Einspritzstelle (36) zuführt.
  4. Verfahren gemäß einem der vorangehenden Ansprüche, wobei wenigstens die Temperatur und/oder die Feuchtigkeit, insbesondere die Luftfeuchtigkeit und/oder die Lufttemperatur permanent, intermittierend oder periodisch kontrolliert werden.
  5. Verfahren gemäß einem der vorangehenden Ansprüche, wobei die Luftfeuchtigkeit im Aufbewahrungsfach (6), in einem Luftkanal (14), der die Luft dem Aufbewahrungsfach zuführt, in einem Luftkanal (16), der die Luft aus dem Aufbewahrungsfach (6) abführt, oder in der Nähe oder an einer Einspritzstelle (36) zum Einspritzen des Dampfes (38) in das Luft- und/oder Aufbewahrungsfach (6) festgestellt wird.
  6. Verfahren gemäß einem der vorangehenden Ansprüche, wobei die Feuchtigkeit der Wäsche festgestellt wird und die festgestellte Wäschefeuchtigkeit als Maß für die Luftfeuchtigkeit dient.
  7. Verfahren gemäß einem der vorangehenden Ansprüche, wobei die dem Aufbewahrungsfach (6) zugeführte Strömung des Dampfes (38) mit sinkender festgestellter Luftfeuchtigkeit und/oder steigender Lufttemperatur zunimmt.
  8. Verfahren gemäß einem der vorangehenden Ansprüche, wobei die Strömung des dem Aufbewahrungsfach (6) zugeführten Dampfes (38) mit steigender Luftfeuchtigkeit und/oder sinkender Lufttemperatur abnimmt.
  9. Verfahren gemäß einem der vorangehenden Ansprüche, wobei in Abhängigkeit von der Temperatur und der Feuchtigkeit eine Kondensationspunktbewertung durchgeführt und die Strömung und/oder Temperatur des Dampfes (38) in Abhängigkeit von der Kondensationspunktbewertung angepasst wird.
  10. Verfahren gemäß einem der vorangehenden Ansprüche, wobei die Strömung des Dampfes (38) eine Strömungsrate der Dampfzuführung zum Aufbewahrungsfach (6) ist und/oder die Strömung des Dampfes durch Einstellen einer Fluid-Strömungsrate der Zuführung eines Fluids zu einer ersten Heizvorrichtung (42) eingestellt wird, die dazu geeignet ist, die Dampfströmung zu erzeugen.
  11. Verfahren gemäß einem der vorangehenden Ansprüche, wobei die Behandlungsvorrichtung (2) eine Dampferzeugungseinheit (32) umfasst und wobei der Betrieb der Dampferzeugungseinheit in Abhängigkeit von dem wenigstens einen Prozessparameter angepasst wird, insbesondere in Abhängigkeit von dem wenigstens einen Prozessparameter gemäß Anspruch 1.
  12. Verfahren gemäß einem der vorangehenden Ansprüche, wobei die Dampferzeugungseinheit (32) eine Hysteresetemperatur-Arbeitsfunktion oder zweistufige Steuerungsfunktion aufweist und die Hysterese- oder Steuerungsfunktion in Abhängigkeit von dem wenigstens einen Trockenprozessparameter angepasst wird, insbesondere von der festgestellten Luftfeuchtigkeit und/oder der festgestellten Lufttemperatur.
  13. Textilienbehandlungsvorrichtung (2), insbesondere Abluft- und/oder Kondensatortrockner, Auffrischungsvorrichtung oder Waschmaschine mit Trocknerfunktion, umfassend:
    ein Textilienaufbewahrungsfach (6) zum Aufbewahren von zu behandelnden Textilien;
    einen Ventilator (12) zum Blasen von Luft durch das Aufbewahrungsfach (6);
    wenigstens eine Dampfzuführungsvorrichtung (32), die geeignet ist, dem Aufbewahrungsfach (6) Dampf (38) zuzuführen;
    eine Messeinheit (30, 44), die geeignet ist, die Luftfeuchtigkeit und/oder Lufttemperatur festzustellen; und
    eine Steuerungseinheit (50), die geeignet ist, wenigstens eine Dampfzuführungssequenz zu steuern; wobei die Steuerungseinheit (50) dazu ausgeführt ist, wenigstens ein Signal von der Messeinheit (30, 44) zu empfangen, welches die Luftfeuchtigkeit und/oder Lufttemperatur anzeigt, dadurch gekennzeichnet, dass
    nachdem die Dampfzuführung gestartet wurde, die Steuerungseinheit (50) geeignet ist, die von der wenigstens einen Dampferzeugungseinheit (32) generierte Dampfströmung und/oder Temperatur in Abhängigkeit von wenigstens einem Prozessparameter zu steuern, der nach dem Start des Dampfzuführungsprozesses variieren kann, wobei der wenigstens eine Prozessparameter wenigstens einer ist aus der Gruppe Luftfeuchtigkeit, Feuchtigkeit der Textilien, Lufttemperatur, Temperatur der Oberfläche oder einer Wand des Aufbewahrungsfaches (6), insbesondere eine Trommeloberflächentemperatur; Temperatur eines den Dampf (38) der Einspritzstelle (36) zuführenden Rohres; eine Luftströmung durch das Aufbewahrungsfach (6) und eine Rotationsgeschwindigkeit einer das Aufbewahrungsfach (6) bildenden Trommel.
  14. Verfahren gemäß Anspruch 13, das eine erste Heizvorrichtung (21) umfasst, die geeignet ist, die in das Aufbewahrungsfach (6) zu blasende Luft zu erhitzen.
  15. Verfahren gemäß Anspruch 13 oder 14, wobei die Steuerungseinheit (50) dazu geeignet ist, die erste Heizvorrichtung (21) während der Vorbehandlungssequenz zu steuern, um die in das Aufbewahrungsfach (6) zu blasende Luft zu erhitzen.
  16. Vorrichtung zur Behandlung von Textilien oder Verfahren zur Dampfzuführung gemäß einem der vorangehenden Ansprüche, wobei während der Dampfzuführungssequenz die Steuerungseinheit (50) dazu geeignet ist, den Ventilator (12) und/oder eine Klappenvorrichtung (26) so zu steuern, dass die Luftströmungsrate durch das Aufbewahrungsfach (6) reduziert wird und/oder die Luftströmungsrichtung umgekehrt wird, wobei die Luftströmungsrate insbesondere auf weniger als 50% der Nennströmungsrate, vorzugsweise auf weniger als 70% oder 85% der Nennströmungsrate reduziert wird.
  17. Vorrichtung zur Behandlung von Textilien oder Verfahren zur Dampfzuführung gemäß einem der vorangehenden Ansprüche, wobei die wenigstens eine Dampfzuführungsvorrichtung (32) eine zweite Heizungsvorrichtung (42) umfasst, die geeignet ist, wenigstens eine Flüssigkeit zu erhitzen und zu verdampfen, die der wenigstens einen Dampfzuführungsvorrichtung zugeführt wird.
  18. Vorrichtung zur Behandlung von Textilien gemäß Anspruch 18, wobei die zweite Heizungsvorrichtung (42) dazu geeignet ist, von der Steuerungseinheit (50) gesteuert zu werden.
  19. Vorrichtung zur Behandlung von Textilien oder Verfahren zur Dampfzuführung gemäß einem der Ansprüche 17 oder 18, wobei die wenigstens eine Dampfzuführungsvorrichtung (32) ein Transportmittel (40) umfasst, insbesondere eine Ventil- oder eine Pumpeneinheit, die geeignet ist, der zweiten Heizvorrichtung (42) wenigstens eine Flüssigkeit zuzuführen.
  20. Vorrichtung zur Behandlung von Textilien gemäß Anspruch 19, wobei das Transportmittel (40) dazu ausgeführt ist, von einer Steuerungseinheit gesteuert zu werden, und wobei insbesondere die Strömungsrate der wenigstens einen Flüssigkeit, die der zweiten Heizvorrichtung zugeführt wird, von der Steuerungseinheit steuerbar ist.
  21. Vorrichtung zur Behandlung von Textilien oder Verfahren zur Dampfzuführung gemäß einem der vorangehenden Ansprüche, wobei die Dampfströmung, die Dauer der Dampfzuführung, die Gesamtmenge des während einer Dampfbehandlungsphase zugeführten Dampfes und/oder die Dampftemperatur in Abhängigkeit von der Art der zu behandelnden Textilien und/oder dem Volumen oder Gewicht der zu behandelnden Textilien festgelegt werden.
  22. Vorrichtung zur Behandlung von Textilien oder Verfahren zur Dampfzuführung gemäß einem der vorangehenden Ansprüche, wobei das Aufbewahrungsfach (6) eine rotierbare Trommel ist.
  23. Vorrichtung zur Behandlung von Textilien oder Verfahren zur Dampfzuführung gemäß einem der vorangehenden Ansprüche, wobei die durch das Aufbewahrungsfach (6) strömungsfähige Luft ein Abluftstrom oder ein Umluftstrom ist.
  24. Vorrichtung zur Behandlung von Textilien oder Verfahren zur Dampfzuführung gemäß einem der vorangehenden Ansprüche, wobei der zugeführte Dampf (38) einer oder mehrere aus folgenden ist: Wasserdampf, Wasserdampf mit Zuschlagstoffen, Desinfektionsmitteldampf, Duftstoffdampf, Reinigungsmitteldampf, desodorisierender Dampf und Weichmacherdampf; wobei der Zuschlagstoff insbesondere eines oder mehrere der folgende ist: ein Desinfektionsmittel, ein Duftstoff, ein Reinigungsmittel, ein desodorisierendes Mittel und ein Weichmacher.
EP08022313.4A 2006-05-02 2006-07-31 Dampferzeugungsverfahren und Vorrichtung zur Behandlung Active EP2055820B1 (de)

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Applications Claiming Priority (6)

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EP06009016A EP1852540B1 (de) 2006-05-02 2006-05-02 Trockner mit einem zusatzunterstützten Trocknungsprogramm
EP06009015A EP1852542B1 (de) 2006-05-02 2006-05-02 Trockner mit geändertem Trocknungsprogramm
EP06009014A EP1852539B1 (de) 2006-05-02 2006-05-02 Trocknungsprogramm mit Knitterschutzfunktion und Trockner
EP06011420A EP1852541B1 (de) 2006-05-02 2006-06-01 Trockner mit einem Trocknungsablauf, der einen Zusatz nutzt
EP06015884A EP1852533B1 (de) 2006-05-02 2006-07-31 Dampferzeugungsverfahren und Vorrichtung zur Behandlung
EP08022313.4A EP2055820B1 (de) 2006-05-02 2006-07-31 Dampferzeugungsverfahren und Vorrichtung zur Behandlung

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EP1852533B1 (de) 2006-05-02 2011-09-07 Electrolux Home Products Corporation N.V. Dampferzeugungsverfahren und Vorrichtung zur Behandlung
KR101448632B1 (ko) 2008-01-18 2014-10-08 엘지전자 주식회사 스팀발생기를 구비한 세탁장치
ES2348351T3 (es) * 2008-04-10 2010-12-03 Bonferraro S.P.A. Lavadora/secadora y ciclo de funcionamiento correspondiente.
CN102517861B (zh) * 2011-12-19 2017-09-26 青岛海尔滚筒洗衣机有限公司 干衣温度检测控制方法及干衣机
DE102017104284A1 (de) * 2017-03-01 2018-05-03 Miele & Cie. Kg Textiltrocknungseinheit und Verfahren zum Betreiben einer Textiltrocknungseinheit
CN110607643B (zh) * 2018-06-15 2022-05-06 青岛海尔洗涤电器有限公司 滚筒洗衣机及其内筒组件
CN111286920A (zh) * 2018-11-21 2020-06-16 青岛海尔滚筒洗衣机有限公司 一种洗衣机的控制方法及洗衣机
CN114892371B (zh) * 2022-06-15 2023-08-25 惠而浦（中国）股份有限公司 一种洗衣机蒸汽发生器的控制方法
CN117781620B (zh) * 2024-02-23 2024-04-26 临朐天利生物制品有限公司 一种槐米烘干系统

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EP1666655A2 (de) * 2004-12-02 2006-06-07 Samsung Electronics Co., Ltd. Knitterbeseitigung in Wäsche

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EP0548064B1 (de) * 1988-02-23 1998-04-08 Mitsubishi Jukogyo Kabushiki Kaisha Trommelwaschmaschine
DE10260151A1 (de) 2002-12-20 2004-07-01 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrockner und Verfahren zur Geruchsentfernung aus Textilien
EP1529875A3 (de) * 2003-11-04 2017-05-17 LG Electronics, Inc. Waschmaschine und dazugehöriges Regelungsverfahren
KR100745418B1 (ko) * 2004-11-16 2007-08-02 삼성전자주식회사 스팀발생장치를 갖춘 세탁기의 제어방법
EP1852533B1 (de) 2006-05-02 2011-09-07 Electrolux Home Products Corporation N.V. Dampferzeugungsverfahren und Vorrichtung zur Behandlung

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EP1666655A2 (de) * 2004-12-02 2006-06-07 Samsung Electronics Co., Ltd. Knitterbeseitigung in Wäsche

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PL1852533T3 (pl) 2012-02-29
EP1852533A1 (de) 2007-11-07

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