EP3109356B1 - Trocknungsverfahren in einem waschtrockner - Google Patents

Trocknungsverfahren in einem waschtrockner Download PDF

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Publication number
EP3109356B1
EP3109356B1 EP15174031.3A EP15174031A EP3109356B1 EP 3109356 B1 EP3109356 B1 EP 3109356B1 EP 15174031 A EP15174031 A EP 15174031A EP 3109356 B1 EP3109356 B1 EP 3109356B1
Authority
EP
European Patent Office
Prior art keywords
drying
laundry
drum
washing
cycle
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
EP15174031.3A
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English (en)
French (fr)
Other versions
EP3109356A1 (de
Inventor
Martino Bondi
Paolo Driussi
Terenzio Girotto
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.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
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 Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to PL15174031.3T priority Critical patent/PL3109356T3/pl
Priority to EP15174031.3A priority patent/EP3109356B1/de
Priority to CN201680036482.3A priority patent/CN107787383B/zh
Priority to PCT/EP2016/063207 priority patent/WO2016206988A1/en
Priority to AU2016282631A priority patent/AU2016282631B2/en
Publication of EP3109356A1 publication Critical patent/EP3109356A1/de
Application granted granted Critical
Publication of EP3109356B1 publication Critical patent/EP3109356B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • D06F33/60—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry
    • 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
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/14—Time settings
    • 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
    • D06F2103/02—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
    • D06F2103/28—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
    • D06F2103/36—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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/38—Time, e.g. duration
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • D06F2105/36—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
    • 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
    • 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
    • D06F33/58—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of rinsing

Definitions

  • the invention relates to a method for drying laundry to be implemented in a washing and drying apparatus.
  • a washer-dryer providing washing function and drying function is known from DE 10 2006 056 419 A1 .
  • the washer-dryer can be used for drying laundry only. In case it is detected that drying-only function is selected, dehydration by rotating the drum with 1000 rpm is executed before starting a drying phase in which the laundry is dried by drying air.
  • DE 10 2006 056419 A1 discloses a method for controlling a washing machine having a drying function.
  • the method includes: a) dehydrating laundry if a command for performing a drying operation is inputted by a user; and b) drying the laundry after the dehydrating step.
  • the dehydrating step a) includes: measuring time until a rotational velocity of a drum reaches a predetermined velocity; calculating an amount of the laundry based on the measured time; determining a dehydration velocity and dehydration time according to the calculated amount of the laundry; and rotating the drum at the dehydration velocity for the dehydration time.
  • the drying step b) includes: hot-air drying the laundry by operating a heater and a blower fan to supply hot air into the drum until dryness of the laundry reaches a predetermined target dryness; and if the dryness of the laundry reaches the predetermined target dryness, cool-air drying the laundry by stopping operation of the heater while keeping operation of the blower fan to supply air of low temperature into the drum for a predetermined time
  • EP 1 852 542 A1 discloses a method of drying textiles in a dryer, in particular a tumble-dryer or washing machine having dryer function, comprising: providing at least one drying program sequence; detecting the start humidity of laundry loaded into the dryer; and automatically modifying a drying cycle of the drying program in dependency of the detected humidity.
  • the dryer comprises a control unit adapted to control at least one program sequence, a control panel for selecting the at least one program sequence by the user, and a sensor unit adapted to detect the humidity of the laundry loaded into the dryer.
  • the control unit is adapted to modify and control the at least one program sequence in dependency of the detected humidity.
  • US 2004/154352 A1 discloses a device and a method for controlling drying of laundry in a drum type washing machine.
  • the device includes a motor for rotating a drum, a motor sensing part for detecting rotation speed of the motor, and a controlling part for controlling the motor sensing part to detect the rotation speed of the motor during a spinning time period, and setting a drying cycle time period according to the detected rotation speed, thereby drying laundry.
  • EP 0 684 335 A1 describes a method for drying laundry, that provides a treatment cycle during which the basket containing the laundry to be dried is made to rotate at a first substantially determined speed for a determined period of time, in the presence of hot air. During the rotation of the basket at least one spinning phase of the laundry is provided, during which the basket rotates at a second speed substantially higher than said first speed.
  • a contribution to the water extraction could be given by a high speed spin performed at the beginning of the cycle.
  • Fig 5 shows an example for such initial high speed spin phase w which have been tested in Applicant's laboratory for improving the drying program.
  • the spin speed is at about 1350 rpm (compare R5 in Figs. 10 , 11 ) and useful to reduce the initial humidity of the laundry load, but it's even more useful in the case where a user wants to dry a very wet (over-wet) laundry load.
  • the high initial humidity could be due to washing by hand and then placing the wet laundry in the washer dryer for drying only or it could be due to an automatic wash program with no final spin or with very low speed final spin or due to a selected user option suppressing a final or high speed spin at the end of the wash program.
  • a washing and drying apparatus which comprises:
  • the drying method comprises the steps of: starting a drying program; detecting the load signal provided by the load detector; evaluating the detected load signal; in dependency of the load evaluation, executing a spin cycle or not executing a spin cycle; and drying the laundry received in the drum in a drying cycle.
  • the detecting of the load signal is for measuring/estimating the signal which indicates the load within the drum which in turn is depending on the laundry load (dry weight) and the water content.
  • the 'detection' is not to be understood that the result is a load signal that delivers the physically true load value of the load in the drum, but is including the understanding that the detection is an 'estimate' for the load which is convenient in most operation cases to optimize the drying efficiency.
  • the signal is representative of the load and further may be influenced by the current mass distribution within the drum (e.g. imbalance effects).
  • the load evaluation results in applying an (additional) spin cycle or not. If the load evaluation indicates that the laundry is over-wet, the spin cycle is provided which provides a mechanical dehydration (by centrifugal force). As compared to the drying by drying air and up to a certain low laundry humidity, the 'drying' using dehydration spinning consumes much less energy. On the other hand, if the laundry is in a state of low humidity (normal-wet) the drying by drying air is more efficient as compared to spinning which would require excessive spinning speeds (laundry damage, apparatus wearing, extreme motor power) for removing the residual water amount from the laundry. Thus the drying cycle is started with the step (direct drying or preceding spin cycle) adequate to the actual need of the laundry.
  • the background is that during the spin cycle (with the heater on or off) the water is removed by centrifugal force. At this time the laundry forms a ring and the drying air can not efficiently dry the laundry.
  • driving the drum at low drum rotation speeds (preferably tumbling speed as used in drying cycle) and providing drying air improves uniform drying of the laundry.
  • the spin cycle is not performed and the apparatus starts drying the laundry, e.g. by activating an drying air heater element and by activating a drying air blower.
  • the load detection, the evaluation of the load signal and the execution or non-execution of the spin cycle is performed immediately after the drying program start.
  • the step of evaluating the detected load signal is or comprises comparing the detected load signal with a threshold value and wherein, when the detected load signal is above the threshold value, the spin cycle is executed.
  • the load signal is 'indicative' of the laundry load and its water content.
  • the drum is rotated with a drum rotation speed in the range of 300 to 700 rpm or with a speed profile having a maximum speed in the range of 300 to 700 rpm.
  • This 'first' drum rotation or spin speed is lower than the maximum possible spin speed of the apparatus.
  • the first (maximum) spin speed in the spin cycle is lower than a high spin speed which is normally used at the end of a washing cycle for dehydrating the laundry.
  • the 'high' spin speed available at the apparatus is at least 800 rpm, 900 rpm, 1000 rpm or 1100 rpm.
  • the first spin speed (herein also called 'medium' spin speed) ensures that laundry can be easily detached from the drum wall during the drying cycle following to the spin cycle.
  • the heater and the drying air fan are activated as follows: the heater is OFF and the drying air fan is OFF, or the heater is OFF and the drying air fan is at least partially ON, or the heater is at least partially ON and the drying air fan is OFF, or the heater is at least partially ON and the drying air fan is at least partially ON.
  • the activation state 'OFF' means that the heater and/or drying air fan are switched of all the time period.
  • the activation state 'ON' includes that the heater and/or drying air fan are ON all the time period or are partially ON during this time period.
  • the above activation state where the heater is ON and the fan is OFF is provided for example when a slight air circulation is provided by the rotation of the drum.
  • the washing and drying apparatus comprises at least one temperature sensor adapted to detect a temperature at the drying arrangement, at the washing arrangement or at the drying and washing arrangement.
  • the method may further comprise the steps of: detecting and evaluating the temperature, and in dependency of the evaluated temperature and in dependency of the load evaluation: not executing the spin cycle, or deactivating the drying air heater during the spin cycle.
  • the spin cycle is executed only, if the detected temperature is below a temperature threshold; for example to avoid a drum spin with a hot tub which could increase the wearing of the apparatus and for avoiding tub material damage.
  • the method further comprises the step of: repeating the steps of detecting the load signal, evaluating the detected load signal and executing the spin cycle until the detected load signal is lower than a predetermined second load threshold and/or a counter has reached a predetermined number of repetitions or a time limit is expired.
  • the second threshold for the load signal may be the same threshold as used at the first time of the load evaluation or it may be a different (e.g. a smaller or higher) threshold value.
  • the counter counts the number times which the steps (loop including the spinning cycle) are repeated and monitoring the count and interrupting the loop prevents being captured in the loop if the spin cycle can not reduce the load signal.
  • the spin cycle which is executed the second time (or the further times) may provide spinning at a second or further spinning speeds or profiles which may be different from the spin speed/speed profile as used during the first spin cycle.
  • the spin speeds used are increased each time the spin cycle is repeated.
  • the spin speed or profile may be the same spin speeds/profiles as the one of the first spin cycle. Under the situation that the laundry is over-wet, the laundry should loose water and the load signal should be lower in the following step of determining the load signal.
  • a laundry detach cycle is executed.
  • the drum is alternatively rotated clockwise and counterclockwise or in counter rotation compared to the rotation direction used during the spin cycle.
  • the laundry detach cycle may be performed when the drying program has already started or as part of drying.
  • the speed for detaching the laundry is lower than the speed at which the laundry adheres to the inner drum mantle during a full rotation and/or is lower than or equal to a speed where the laundry starts to tumble during a full rotation.
  • the detach cycle is preferably executed after each spin cycle, if there are more than one spin cycles (e.g. above loop).
  • the heater is ON and the fan is ON or the heater is OFF and the fan is ON or OFF.
  • a time period of predetermined duration is provided between the step of starting the drying program and before detecting the load signal (e.g. before detecting the load signal the first time).
  • providing/non-providing and/or the predetermined duration are dependent on user selection inputted via an input selector of the washing and drying apparatus and/or is dependent on laundry type (cotton, synthetics, mixed laundry ).
  • the drying air heater is ON and the drying air fan is ON.
  • switching ON the drying air heater and drying air fan is dependent on user selection inputted via an input selector of the washing and drying apparatus and/or is dependent on laundry type (cotton, synthetics, mixed laundry ).
  • the drum is rotated at a second rotation speed or is accelerated up to a speed, which is lower than the first rotation speed and which is equal or greater than the minimum speed required to keep the laundry adhering to the inner surface of the drum during full rotations.
  • the second drum rotation speed preferably is equal or lower than the first drum speed and/or equal or greater to the minimum speed required to keep laundry attached to the inner surface of the drum.
  • the second rotation speed is in the range of 100 to 700 rpm or 200 to 600 rpm, more preferably in the range of 300 to 500 rpm, more preferably in the range of 350 to 480 rpm.
  • Such so called 'spin impulse' is preceding the detection of the load signal (e.g. the measure/estimation of laundry inertia/weight).
  • the load signal e.g. the measure/estimation of laundry inertia/weight.
  • the method provides the ability to check whether there was a preceding washing program (which is preceding the drying program to be started or already being started) and to check whether in this washing program a final dehydration spinning (e.g. after the last rinse) was made or not and to adapt the drying program execution in response thereto. Therefore the method preferably further comprises the steps of:
  • the meaning of the 'last spinning cycle being skipped' may include that the final spinning was executed at low spinning speed (e.g. below 700, 600, 500, or 400 rpm or is below R2).
  • the 'skipping' during the washing program may also be the result of a user selection (for example completely skipping the final dehydration spin) or the result of the control unit detecting a fault or of a restriction that prevents applying high speed in the final spinning. For example in case of heavy imbalances.
  • the drum is rotated at a second speed and thereafter the load signal is detected.
  • the drum may be rotated at the second speed (in a peak-shaped speed profile with the second speed as maximum or with the second speed for a predefined period of time).
  • the second speed is between 100 and 700 rpm, further preferably between 300 and 500 rpm or is R2.
  • the second speed is equal to or greater than the minimum speed required to keep the laundry adhering to the inner surface of the drum during full rotations.
  • the purpose of rotating at the second speed before load signal detection is that the laundry is more evenly distributed thereby in the drum and is pre-attached to the drum wall for avoiding or reducing imbalance.
  • the operation parameters of the first drum spinning rotation and/or the parameter of spinning with the second speed are based on one or more of the following:
  • the drum operation parameters are e.g. rotation speed and/or rotation duration.
  • the first drum spinning rotation is the rotation speed or the maximum rotation speed of a speed profile used during the spinning cycle.
  • the estimation of the (dry) laundry weight is made as mentioned above and/or below. E.g. it is evaluated or estimated from motor torque or direct laundry weight measurement.
  • an algorithm is provided for estimating the laundry type, i.e. laundry composition (Cotton, Synthetic, Mix etc.). For example by monitoring the water level (i.e. laundry water absorption) reached within the tub compared to water amount supplied to the tub during the initial cycle of a washing step.
  • the drying arrangement comprises a drying air condensation device, and wherein the method comprises: When the drying air heater is activated, activating the drying air condensation device, and/or when the drying air heater is deactivated, at least temporary deactivating the drying air condensation device.
  • a drying air condensation device may be provided by a water spray condenser driven by a water valve (preferably using tap water as cooling means).
  • the drying arrangement comprises a or the drying air condensation device
  • the method comprises: Deactivating the drying air heater while the drying air condensation device is activated, and/or activating the drying air heater while the drying air condensation device is deactivated. If for example a quick temperature increase should be achieved, the (electrical or resistivity) heater is activated and the drying air condensation device is deactivated. Preferably, if a quick temperature drop is intended, the drying air condensation device is ON and the drying air heater is OFF. This may prevent overheating when the heater is controlled with a drying air temperature hysteresis.
  • a laundry cooling cycle is provided by: Deactivating the drying air heater while the drying air fan is at least partially activated and while the drum is rotated in clockwise direction, in counter clockwise direction or in clockwise and counterclockwise direction for cooling down the laundry.
  • the cooling phase is provided after a (final) drying phase and before the (apparatus) end of the drying program (drying cycle).
  • cooling phase for laundry cooling cycle is skipped in dependency of at least one of:
  • Fig. 1 shows a washer dryer 2 which is an example for a laundry treatment apparatus.
  • the washer dryer is a tumbling washing dryer where the laundry tumbles when the drum 36 is rotating at low speed.
  • the drum rotation axis is horizontal or inclined relative to the horizontal (without being vertically oriented).
  • the washer dryer 2 described in detail is a heat pump system washer dryer.
  • the invention is also and preferably applicable in an electrically heated washer dryer - see also below - and except the way and arrangement for cooling/heating the drying air the following is fully applicable for any washer dryer.
  • the washer dryer 2 has a cabinet 12 or housing defining the outer appearance.
  • the laundry 40 is loaded through a loading opening 4 which is a loading passage between the front side of the front wall of the cabinet 12 and a front opening of a tub 30 and drum 36 receiving the laundry.
  • a gasket is provided, which is sealing the opening at the front wall and the front opening of the tub 22.
  • the front side of the loading opening/passage 4 is closed by a loading door 6 or porthole which has a handle 7 for opening and closing the door.
  • a display and input panel 8 is provided having input elements for inputting program selections and/or program options by the user.
  • the panel 8 further has indicators for indicating the selected programs/options and/or the status of a running program. Via a program selector 10 the basic drying and/or washing programs can be selected by the user.
  • a detergent drawer is arranged at the side of the panel 8 for receiving liquid and/or solid detergents and other treatment agents by manual filling respective compartments by the user.
  • additional compartments or openings may be provided for receiving treatment agents for a drying and/or dry-cleaning process.
  • Fig. 2 schematically shows an exemplary arrangement of components in the interior of the cabinet 12 of the washer dryer 2 in side view.
  • the drying function of the washer dryer is provided by a heat pump system 14 that has a refrigerant loop 16 for circulating the refrigerant as indicated by flow RF using refrigerant lines between the components of system 14.
  • a first heat exchanger 18 here an evaporator
  • a compressor 22 circulating the refrigerant
  • a second heat exchanger (condenser) 20 for heating the drying air
  • an expansion device 24 for expanding the compressed refrigerant into the first heat exchanger 18.
  • the components of the heat pump system 6 are arranged above the tub 36, but in other embodiments the drying air cooling/heating components may be arranged or may be partially arranged below and/or laterally of the tub.
  • drying air is circulated within a drying air loop, wherein the drying air A is conveyed by a blower 26 arranged in a drying air channel 28 in which also the first and second heat exchangers 18, 20 are arranged.
  • the drying air loop is formed by the drying air channel 28 and the tub 30, wherein the drying air channel guides the drying air exhausted from the tub through: an outlet 32, an optional fluff filter 42, the first heat exchanger 18, the second heat exchanger 20, and back through a drying air inlet 34 into the tub 30.
  • the rotatable drum 36 is arranged as a laundry chamber receiving the laundry 40.
  • the laundry is loaded/unloaded through drum and tub openings (indicated by 4) covered by the loading door 6 to be opened and closed by a user.
  • the drum 36 is driven by a drum motor 38 which is powered and controlled by a drum motor inverter 58 (which in turn is controlled by a control unit 46).
  • a heater 44 is arranged for heating the washing liquid used for washing the laundry 40.
  • a heater temperature sensor 56 may be arranged.
  • the water supply arrangement (including the detergent flushing arrangement for the detergent drawer) as well as the water draining arrangement and optionally the washing water circulation system of the apparatus 2 are not shown or described in further detail.
  • Fig. 3 shows a schematic block diagram of components of the washer dryer which provide signals to and/or signals from the control unit 46 controlling the operation of the apparatus 2.
  • the control unit 46 is connected to a memory 48 (like RAM and/or ROM), which is designed to permanently store (e. g. EPROM) data for example for different user selectable programs and program cycles as well as apparatus operation parameters (e.g. thresholds, look-up tables) to be used during program runs and which depend on the selected program and/or user selected operation options. Finally memory for temporarily storing data during a program run is provided in the memory 48.
  • a memory 48 like RAM and/or ROM
  • EPROM e.g. EPROM
  • apparatus operation parameters e.g. thresholds, look-up tables
  • the user can select the washing and/or drying program to be used for treating the laundry and options for the washing and/or drying program.
  • the user can select the options cupboard-dry, damp-dry or ironing-dry as the final laundry humidity for a drying cycle to be executed.
  • panel 8 indicates different information to the user. For example the program state, the start or interrupt of the program, the time-to-end of the running cycle, the selected options or the like.
  • the control unit 46 receives signals or values for processing and controlling the apparatus from:
  • the compressor motor 22 is powered by a compressor inverter 64 to which a compressor inverter sensor unit 62 is associated, wherein the sensor unit 62 may be integrated in or at the compressor inverter 60.
  • the compressor inverter sensor unit 62 sends a temperature signal related to the compressor motor and/or inverter 60 to the control unit 46.
  • the washer dryer instead of having a heat pump system as shown, may have an electrical (resistivity or radiator) heater as the second heat exchanger 20 (electrical heater instead of the refrigerant condenser).
  • the first heat exchanger 18 instead of the evaporator
  • the drying air is cooled and dehumidified by droplet or spray contact with the cooling water and/or the drying air is cooled and dehumidified by an air/air heat exchanger using ambient air for cooling the drying air.
  • the drying air heating and/or the drying air cooling can be switched on or off with much shorter reaction times (follow-up time) and/or can be activated/deactivated in much shorter periods than in a heat pump system where temperature equilibration and compressor waiting times renders such system slow.
  • Fig. 5 - shows a drying test in the washer dryer 2 in which over-wet laundry was dried in a drying cycle (washing cycle not shown in Fig. 5 ) and in which a high speed spin speed has been used in phase w.
  • the drying cycle starts with a first drying phase v, in which the drum is slowly rotated for distributing the laundry within the drum.
  • the blower 26 and the electrical heater (or the heat pump system) are on for heating the drying air.
  • the high spin speed phase w is following the first drying phase v during which the drum is rotated at a high rotation speed R5 (here about 1350 rpm).
  • a detach phase x is following the high spin speed phase w.
  • a second drying phase y is executed during which the laundry is dried until been dry.
  • the heater is switched on during the first drying phase v and the second drying phase y while it is switched off during the high speed spin phase w and the detach phase x.
  • Power consumption is high during the high spin speed phase w due to the power consumption of the motor 38.
  • the inertia is a good criterion or indicator for the load in the drum and the distribution of laundry within the drum. The inertia can be detected/estimated via drum motor parameters as these are responsive to the drum load (including a fixed inertia value for the drum) and are depending on the laundry dry weight and the water bound therein.
  • the inertia I is calculated by the control unit 46 receiving the signals of rotation speed over time and torque as detected (or pre-calculated) by the drum motor inverter 58 and the inverter sensor unit 60 therein.
  • the control unit 46 and/or the inverter sensor unit 60 can calculate the inertia I using the torque and rotation speed, wherein the torque is derived from one or more of the following signals detected in the inverter sensor unit 60: a motor current, the power, the phase shift, the magnetic flux, the driving voltage (all in time dependency and/or as a temporal ingredient). Determination of the inertia is known in detail from EP 2 107 151 A1 to which full reference is made relating to implementing an exemplary torque measurement and determining the inertia I.
  • Fig. 4 shows the dependency of the inertia in dependency of different types of laundry and of the degree of humidity of such laundry.
  • the inertia threshold Ithr is shown and some experimental measuring points.
  • the tests for determining the inertia-criterion for the laundry being normal wet or over-wet have been made with laundry as used according to the IEC standard with a 4 kg load (weight of the dry laundry) and with 4 kg sponge material (also dry sponge weight).
  • the humidity ranges of the starting humidity at which the inertias have been determined are indicated at the bottom of the diagram.
  • the diagram of Fig. 4 shows that the inertia is a good criterion for deciding whether the laundry is over-wet and a dedicated treatment before or in the initial phase of the drying should be provided to improve the drying result and/or to reduce the drying time/energy.
  • the over-wet state can be determined.
  • the inertia threshold Ithr is depending on the laundry type as inputted by the user at the panel 8 and/or as determined by the apparatus 2 for example during previous washing phase or by using dynamic inertia and/or torque measurements.
  • Figs. 6 and 7 show drying cycles (not including washing cycles) from the start and the rotation speed in rpm of the drum is shown over time.
  • the inertia threshold Ithr (in arbitrary units) is shown and is used for determining, whether the laundry is over-wet ( Fig. 6 ) and a specific drying cycle including a spin phase d is to be implemented, or whether the laundry is normal-wet ( Fig. 7 ) and the drying cycle can be executed without spin phase d. If there is no need for a spin phase, it is assumed that the laundry has a humidity as if spun (final spinning - phase n) at the end of a washing cycle before or it is assumed that the user loaded laundry which humidity is low enough for a "normal" drying cycle.
  • Fig. 6 shows a first drying phase a at the start of the drying cycle during which the drum is rotated at tumbling speed (between 50 and 80 rpm or at R6 of Figs. 10-12 ) which is interrupted by drum stop periods for enhancing laundry redistribution.
  • Drum rotation may be alternate in clockwise and counterclockwise direction.
  • the heater 20 and/or blower 26 may be ON at least temporarily.
  • Phase a is followed by a low speed impulse phase b during which a fast speed up-ramp up to a third rotation speed R3 and a down-ramp to lower rotation speed (e.g. R4) is executed.
  • the speed profile is such that drum rotation at the third rotation speed R3 is only for a short time period.
  • a speed ramp peak with a low maximum drum speed R3 is provided during which the laundry does not tend to permanently adhere to the drum mantel (i.e. if the drum would be stopped now, the laundry detaches from the laundry wall at the top positions of the drum).
  • the fourth rotation speed R4 is preferably such that the laundry is still adhering to the drum wall by centrifugal force so that the following inertia detection phase starts with adhering laundry.
  • the spin peak (“low speed impulse") provides a more even distribution of the laundry along the drum mantel, which in turn improves the detection of the inertia by reduction of error sources in the inertia measurement and evaluation/estimation. Actually, it was observed that laundry imbalance by uneven distribution of laundry in the drum may render the inertia determination more unreliable und such imbalance is removed with the low speed impulses in phase b.
  • phase c the inertia is determined which is repeated here four times corresponding to the four sawtooth-like speed ramps between rotation speeds R4 and T. By the dotted horizontal lines the respective speeds are indicated. T is the maximum speed during inertia measurement and R4 is the starting speed - both are above the threshold speed at which the laundry is hold at the drum wall due to centrifugal force.
  • the inertia I is determined each time a speed ramp R4 - T - R4 is performed and the inertias are summed up (here four times) to have as a result the total inertia I1.
  • the inertia threshold Ithr which here of course is the four-fold of the simple inertia threshold.
  • the spin cycle proceeds with a medium speed spinning phase d, in which the rotation speed is increased first to a low spinning speed R2, then reduced to the rotation speed (for example R4) and thereafter the rotation speed is again increased to R2 and from there to R1 which is about 650 rpm. Thereafter, the rotation speed is reduced again to R4.
  • a medium speed spinning phase d in which the rotation speed is increased first to a low spinning speed R2, then reduced to the rotation speed (for example R4) and thereafter the rotation speed is again increased to R2 and from there to R1 which is about 650 rpm. Thereafter, the rotation speed is reduced again to R4.
  • phase c it was determined that the laundry is over-wet (I1 > Ithr) and thus, dehydration using medium spinning speed R1 is provided in phase d.
  • the inertia peaks (R4-T-R4), the inertia is detected before increasing to medium spin speeds R2 and R1 to detect whether there is any imbalance that may harm the drum and tub mechanics.
  • R2 By spinning with the low or medium spin speed R2, R1 it is avoided that the laundry significantly/permanently attaches to the drum mantel which would prevent or slow down detachment of the laundry in the following (second) drying phase f.
  • phase e the inertia measurement is repeated which is the same as in phase c.
  • the added-up inertia I2 is lower than the inertia threshold Ithr, which means that there is no longer an over-wet state of the the laundry and the second drying phase f can follow to phase e.
  • the medium spin phase as in phase d can be repeated following by a third phase (like c and e) of determining the inertia I. See loop in the flow diagram of Fig. 8 with the repetition of steps S8 to S18.
  • Fig. 7 shows the rotation speed RPM of the drum over time for a drying cycle having essentially the same phases a, c and f as in Fig. 6 .
  • the phase b' of the low speed impulse is slightly modified as compared to phase b of Fig. 6 .
  • Ib inertia detection Ib preceding the low speed impulse to R3 and which is denoted as Ib
  • Ib the inertia detection Ib is low and thus the time period at which the drum rotation speed is held at the third rotation speed R3 is extended. This can be seen from the plateau at the tip of the medium speed pulse.
  • the total inertia I1 is determined again by four times executing the speed ramps R4-T-R4 and summing up the respectively determined inertias. As in this case it was evaluated that the summed-up inertia I1 is lower than the threshold Ithr, the procedure immediately proceeds with the second drying phase f.
  • Fig. 8 shows a flow diagram of a drying cycle according to the invention.
  • the small letters in brackets refer to the different phases as shown in and described for Figs. 6, 7 , 10 and 11 .
  • the drying starts at step S0 where the drying cycle is initialized by setting the variables for the drying cycle.
  • a detach phase a0 is performed (compare Fig. 10 ) and is preferably executed when a combined washing and drying program is running and the drying program is the drying cycle thereof.
  • S2 is provided, if in the last phase of the washing cycle a high speed spinning at spinning (e.g. at speed R5 - see phase n of Fig. 10 including the R5 peak) was executed.
  • a first drying phase a is executed providing a pre-drying.
  • a low spin speed impulse phase b is executed.
  • the drum is rotated at a low spin speed to improve distribution of the laundry within the drum to avoid unwanted influence by an imbalance on the inertia measurement (see above).
  • the drum rotation for laundry distribution is made by the third speed R3, which may be the same as the low spin speed R2 during phase d shown in Fig. 6 .
  • step S6 a counter in the control unit for counting the numbers of medium spin speed phases is set to zero.
  • step S8 the inertia determining phase c is executed to determine the weight of the load which is composed of the laundry dry weight and the water bound in the laundry.
  • the load signal is the inertia which is measured/estimated and which is caused by the drum load.
  • step S10 if the inertia is above the predetermined inertia threshold Ithr and if the number n of already executed medium spin speed phases d is below a predetermined maximum number n max , then the process proceeds with step S12. As explained before, comparing the inertia with the inertia threshold and finding that the inertia is higher than the threshold results in the conclusion that the laundry is over-wet. Then, prior to drying by using drying air (phase f), a spinning at medium spinning speed (phase d) is to be performed.
  • Step S12 only indicates that by step S10 over-wet laundry (or an inertia estimate corresponding thereto) was positively detected.
  • step S14 the drum is rotated at a low spin speed R2 to improve distribution of the laundry within the drum to avoid unwanted influence by an imbalance on the inertia measurement (see Fig. 6 above).
  • step S16 the drum is rotated at a medium drum speed R1 as shown in phase d including broad plateau which means an extended time as compared to the peak impulse during phase b.
  • the extended period of rotating with the first medium speed R1 results in spin-dehydrating the laundry.
  • step S18 the counter value is increased by 1 and the procedure advances to step S8 for repeating the inertia detection/estimation as for example shown in phase e of Fig. 6 .
  • step S8-S10-S12...S18-S8 is repeated as long as the counter value n is below the maximum value n max , if the inertia does not drop by step S16.
  • the procedure proceeds to step S20 which only indicates that a normal weight of the laundry (normal-wet) was detected such that no or no further medium speed spinning phase d is required.
  • step S21 is the drying phase f during which the laundry is dried in a conventional way.
  • step S22 optionally a cooling phase g is executed to cool down the laundry temperature so that the laundry can be safely removed from the drum by the user. Then the drying cycle is finished at step S24.
  • Fig. 9 shows a diagram with the relation between the inertia I and different types and humidity degrees of laundry similar to Fig. 4 and including low laundry load or volumes. It shows that at low dry laundry weights of IEC-standard laundry the detected Inertia I may be below the threshold Ithr despite the fact that the laundry is over-wet (humidity above 70%). However it was found in this case that the volume of the laundry is low enough that it can start tumbling during the drying phase f such that efficient air/laundry contact for evenly drying the laundry on large surface ratios of the laundry pieces is enabled. Although the drying time is somewhat extended as compared to normal-wet laundry (low humidity) still an acceptable drying efficiency is implemented.
  • Fig. 10 shows the drum rotation speed rpm over time t for a cotton laundry treatment program including a washing cycle (only the end phase shown) and a drying cycle.
  • the time diagram shows only the two last phases m and n of the washing cycle.
  • Phase m indicates only some of the drum rotations or the drum rotations speeds during a rinsing phase m.
  • the inclined double lines on the bottom timeline indicate that the actual time period on the respective time line may be extended.
  • a final spin phase n is following the rinsing phase m.
  • phase m normally the laundry is spun including a high speed spin period at spinning speed R5 which is for example 1350 rpm (compare for example Fig. 5 ).
  • the laundry is sufficiently dehydrated during this phase n to achieve humidity of the laundry in the normal-wet range.
  • the laundry is not spun. This means that the rpmpeak having speed R5 is excluded. I.e. the high speed spin is completely skipped and the bent arrow indicates a jump of the program sequence which does not include the high spin speed peak. Under such situation the laundry is not dehydrated and the laundry is over-wet.
  • the program is halted such that the user can remove a portion of the laundry load previously washed.
  • the reason is that by the washing cycle in maximum more laundry can be washed than in the following drying cycle can be efficiently dried.
  • using the maximum allowable laundry load for the washing cycle represents an over load for the drying cycle and if the program would be continued without removing a portion of the laundry, the drying cycle is extremely long or the final humidity achieved at the end of the drying cycle is too high or at least higher than the intended target humidity.
  • the drying cycle is started with the initialization (compare step S0).
  • the drying cycle includes in this case the optional detach phase a0 which is provided for the case that no laundry is removed and some of the laundry is adhering to the drum wall.
  • the detach phase a0 can be skipped and the drying cycle can be started with the optional first drying phase a (compare step S4).
  • the optional first drying phase a has been described above.
  • a second drying cycle has to be started for drying the second portion of the laundry load and for which no information about the washing cycle is available.
  • the laundry apparatus normally has no information of the washing cycle and a drying cycle is started as if no washing cycle was performed before.
  • the inertia detection phase c it is determined whether the freshly loaded laundry is normal-wet or over-wet.
  • the over-wet laundry then requires introduction of phase d for medium spinning for spin dehydration of the laundry before starting an efficient drying phase f, g.
  • Fig. 11 shows an example for washing and drying synthetic laundry.
  • the time sequence is the same as in Fig. 10 except that the detach phase a0 and the first drying phase a are omitted.
  • the heater H and the blower B are activated (on) or deactivated (off) at different instances/phases (time points).
  • Determining of the load in the drum is described above by determining the inertia as a representative example of determining the load.
  • the 'determining' via the inertia - as more or less all other methods of determining the load - represent an estimation of the load for which some experimental corrections or some preparing measures have to be made before a reliable load estimation value results from the measurement.
  • a high laundry load of normal-dry laundry may 'simulate' an inertia of a normal dry weight load being normal-wet.
  • unevenly distributed laundry in the drum may result in imbalance which in turn adversely affects the inertia measurement.
  • the 'determining' of the laundry load e.g.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (16)

  1. Verfahren zum Trocknen von Wäsche, auszuführen in einer Wasch- und Trockenvorrichtung (2),
    wobei die Wasch- und Trockenvorrichtung (2) Folgendes umfasst:
    einen Bottich (30),
    eine Trommel (36), die in dem Bottich (30) angeordnet und dafür eingerichtet ist, Wäsche (40) zur Behandlung in der Trommel aufzunehmen,
    eine Waschanordnung, die dafür eingerichtet ist, die in der Trommel (36) aufgenommene Wäsche zu waschen,
    eine Trocknungsanordnung, die ein Trocknungsluft-Heizaggregat (20, H) und ein Trocknungsluftgebläse (26, B) umfasst, wobei die Wasch- und Trockenvorrichtung dafür eingerichtet ist, in der Trommel (36) aufgenommene Wäsche zu trocknen, und
    einen Lastdetektor (46, 60) zum Erkennen eines Lastsignals, das die in der Trommel (36) aufgenommene Last angibt,
    wobei das Trocknungsverfahren Folgendes umfasst:
    Starten (S0) eines Trocknungsprogramms,
    Erkennen (d, S8) des Lastsignals (I),
    Bewerten (S10) des erkannten Lastsignals (I),
    wobei das Verfahren durch Folgendes gekennzeichnet ist:
    Ausführen (S16) eines Schleudergangs (d) oder kein Ausführen eines Schleudergangs in Abhängigkeit von der Lastbewertung und
    Trocknen (f, S22) der in der Trommel (36) aufgenommenen Wäsche (40) in einem Trocknungsgang,
    wobei der Schritt des Bewertens (S10) des erkannten Lastsignals (I) das Vergleichen des erkannten Lastsignals mit einem Grenzwert (Ithr) ist oder umfasst und wobei der Schleudergang (d) ausgeführt wird, wenn das erkannte Lastsignal über dem Grenzwert liegt.
  2. Verfahren nach Anspruch 1, wobei die Trommel (36) in dem Schleudergang (d) mit einer ersten Trommeldrehzahl (R1) im Bereich von 300 bis 700 rpm oder mit einem Drehzahlprofil, das eine maximale erste Drehzahl (R1) im Bereich von 300 bis 700 rpm aufweist, gedreht wird.
  3. Verfahren nach Anspruch 1 oder 2, wobei während der Zeitspanne des Schleudergangs (d), während der Zeitspane der Lasterkennung (c) oder während der Zeitspannen (c, d) der Lasterkennung und des Schleudergangs:
    das Heizaggregat (20, H) AUS ist und das Trocknungsluftgebläse (26, B) AUS ist,
    das Heizaggregat AUS ist und das Trocknungsluftgebläse zumindest teilweise AN ist,
    das Heizaggregat zumindest teilweise AN ist und das Trocknungsluftgebläse AUS ist oder
    das Heizaggregat zumindest teilweise AN ist und das Trocknungsluftgebläse zumindest teilweise AN ist.
  4. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Wasch- und Trockenvorrichtung (2) mindestens einen Temperatursensor (50, 52, 54, 56) umfasst, der dafür eingerichtet ist, eine Temperatur an der Trocknungsanordnung, an der Waschanordnung oder an der Trocknungs- und Waschanordnung zu erkennen, und wobei das Verfahren ferner Folgendes umfasst:
    Erkennen und Bewerten der Temperatur und
    in Abhängigkeit von der bewerteten Temperatur und in Abhängigkeit von der Lastbewertung (S8, c):
    kein Ausführen des Schleudergangs (d) oder
    Deaktivieren des Trocknungsluft-Heizaggregats (20, H) während des Schleudergangs (d).
  5. Verfahren nach einem der vorhergehenden Ansprüche, wobei das Verfahren ferner Folgendes umfasst:
    Wiederholen der Schritte (S8, S10, S16) des Erkennens des Lastsignals, des Bewertens des erkannten Lastsignals und des Ausführens des Schleudergangs, bis das erkannte Lastsignal (I) kleiner als ein festgelegter zweiter Lastgrenzwert (Ithr) ist oder ein Zähler (n) eine festgelegte Anzahl (nmax) von Wiederholungen erreicht hat oder eine Zeitgrenze erreicht ist.
  6. Verfahren nach einem der vorhergehenden Ansprüche, wobei nach dem Schleudergang (d) ein Wäschetrennungsgang ausgeführt wird, in dem die Trommel abwechselnd im und entgegen dem Uhrzeigersinn oder in Gegenrichtung zu der Drehrichtung, die während des Schleudergangs verwendet wurde, gedreht wird.
  7. Verfahren nach einem der vorhergehenden Ansprüche, wobei zwischen dem Schritt des Startens (S0) des Trocknungsprogramms und vor dem Erkennen (S8, c) des Lastsignals (I) eine Zeitspanne (a0, a) von festgelegter Dauer bereitgestellt wird.
  8. Verfahren nach Anspruch 7, wobei während der Zeitspanne (a0, a) nach dem Programmstart und vor dem Erkennen des Lastsignals (I) das Trocknungsluft-Heizaggregat AN ist und das Trocknungsluftgebläse AN ist.
  9. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Trommel (36) während oder vor dem Schritt (S8, c) des Erkennens des Lastsignals mit einer zweiten Drehzahl (R2) gedreht oder auf eine Drehzahl beschleunigt wird, die kleiner als eine oder die erste Drehzahl (R1) ist, die in dem Schleudergang (d) verwendet wird, und die gleich oder größer als die Mindestdrehzahl ist, die erforderlich ist, um die Wäsche (40) während voller Umdrehungen an der Innenfläche der Trommel (36) haftend zu halten.
  10. Verfahren nach einem der vorhergehenden Ansprüche, wobei das Verfahren ferner die folgenden Schritte umfasst:
    Erkennen, ob das auszuführende Trocknungsprogramm Teil eines Wasch- und Trocknungsprogramms ist, und Feststellen, ob während des Waschprogramms ein Schleudergang (n) nach dem Spülen, der normalerweise nach dem letzten Wäschespülgang (m) ausgeführt wird, übersprungen wurde,
    wenn der Schleudergang (n) nach dem Spülen übersprungen wurde, dann Ausführen des Schleudergangs (d) während des Trocknungsprogramms mit einer oder der ersten Trommeldrehzahl (R1) und dann Erkennen (S8, e) des Lastsignals (I) und
    wenn der Schleudergang (n) nach dem Spülen nicht übersprungen wurde, dann Ausführen eines Schleudergangs (b) während des Trocknungsprogramms mit einer oder der zweiten Drehzahl (R2) und dann Erkennen (c) des Lastsignals (I) oder Erkennen (c) des Lastsignals.
  11. Verfahren nach einem der vorhergehenden Ansprüche, wobei das Verfahren nach dem Starten (S0) des Trocknungsprogramms und vor dem Erkennen (d, S8) des Lastsignals (I) ferner Folgendes umfasst:
    Drehen (b) der Trommel mit einer zweiten Drehzahl (R2) oder mit einem Drehzahlprofil, das eine zweite Drehzahl (R2) beinhaltet.
  12. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Betriebsparameter der Trommeldrehung mit einer oder der ersten Geschwindigkeit (R1) und/oder die Parameter der Trommeldrehung mit der zweiten Drehzahl (R2) auf einem oder mehreren des Folgenden basieren:
    - einem Wäschebehandlungsprogramm oder Wäschebehandlungsoptionen, die von einem Benutzer über eine Eingabeauswahl (8, 10) der Wasch- und Trockenvorrichtung (2) eingestellt werden,
    - einer Wäscheart, wie sie von einem Benutzer eingestellt oder durch die Wasch- und Trockenvorrichtung geschätzt wird,
    - der Dauer des Wäschebehandlungsprogramms, die von einem Benutzer eingestellt oder von der Wasch- und Trockenvorrichtung geschätzt wird, und
    - wenn das Trocknungsprogramm Teil eines Wasch- und Trocknungsprogramms ist, einer Schätzung des Wassergehalts der Wäsche zu Beginn des Trocknungsprogramms, basierend auf der Differenz des Wäschegewichts zwischen dem Gewicht der trockenen Wäsche zu Beginn eines Trocknungs- und Waschprogramms und dem Gewicht der nassen Wäsche am Ende des Waschteils des Wasch- und Trocknungsprogramms.
  13. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Trocknungsanordnung ein Trocknungsluft-Kondensationsgerät (18) umfasst und wobei das Verfahren Folgendes umfasst:
    Aktivieren des Trocknungsluft-Kondensationsgeräts (18), wenn das Trocknungsluft-Heizaggregat (20, H) aktiviert (an) ist, oder
    zumindest zeitweises Deaktivieren des Trocknungsluft-Kondensationsgeräts (18), wenn das Trocknungsluft-Heizaggregat (20, H) deaktiviert (aus) ist.
  14. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Trocknungsanordnung ein oder das Trocknungsluft-Kondensationsgerät (18) umfasst und wobei das Verfahren Folgendes umfasst:
    Deaktivieren des Trocknungsluft-Heizaggregats (20, H), während das Trocknungsluft-Kondensationsgerät aktiviert ist, oder
    Aktivieren des Trocknungsluft-Heizaggregats (20, H), während das Trocknungsluft-Kondensationsgerät deaktiviert ist.
  15. Verfahren nach einem der vorhergehenden Ansprüche, wobei nach dem Trocknungsgang (f) ein Wäschekühlungsgang (g) bereitgestellt wird durch: Deaktivieren des Trocknungsluft-Heizaggregats (20, H), während das Trocknungsluftgebläse (26) zumindest teilweise aktiviert ist und während die Trommel (36) im Uhrzeigersinn, entgegen dem Uhrzeigersinn oder im Uhrzeigersinn und entgegen dem Uhrzeigersinn gedreht wird, um die Wäsche abzukühlen.
  16. Verfahren nach einem der vorhergehenden Ansprüche, wobei der oder ein Wäschekühlungsgang (g) in Abhängigkeit von mindestens einem des Folgenden übersprungen wird:
    - einer Benutzerauswahleingabe über eine Eingabeauswahl (8, 10) der Wasch- und Trockenvorrichtung (2),
    - der Wäscheart, wie sie von einem Benutzer eingegeben oder durch die Wasch- und Trockenvorrichtung geschätzt wird, und
    - der Dauer des Wäschebehandlungsprogramms, die von einem Benutzer eingestellt oder durch die Wasch- und Trockenvorrichtung geschätzt wird.
EP15174031.3A 2015-06-26 2015-06-26 Trocknungsverfahren in einem waschtrockner Active EP3109356B1 (de)

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EP15174031.3A EP3109356B1 (de) 2015-06-26 2015-06-26 Trocknungsverfahren in einem waschtrockner
CN201680036482.3A CN107787383B (zh) 2015-06-26 2016-06-09 洗涤干燥机中的干燥方法
PCT/EP2016/063207 WO2016206988A1 (en) 2015-06-26 2016-06-09 Drying method in a washer-dryer
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TWI730221B (zh) * 2017-02-24 2021-06-11 日商松下知識產權經營股份有限公司 洗衣機及其控制裝置
CN110857524B (zh) * 2018-08-10 2021-10-29 青岛海尔洗涤电器有限公司 一种衣物烘干方法及应用该方法的衣物处理装置
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EP3109356A1 (de) 2016-12-28
AU2016282631B2 (en) 2021-01-14
WO2016206988A1 (en) 2016-12-29
AU2016282631A1 (en) 2017-11-23
CN107787383B (zh) 2021-03-12
CN107787383A (zh) 2018-03-09

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