EP3124668B1 - Trocknungsverfahren für waschtrockner mit siphonbefüllung und waschtrockner - Google Patents

Trocknungsverfahren für waschtrockner mit siphonbefüllung und waschtrockner Download PDF

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Publication number
EP3124668B1
EP3124668B1 EP15178436.0A EP15178436A EP3124668B1 EP 3124668 B1 EP3124668 B1 EP 3124668B1 EP 15178436 A EP15178436 A EP 15178436A EP 3124668 B1 EP3124668 B1 EP 3124668B1
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EP
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Prior art keywords
drying
water
air
washer dryer
program
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EP15178436.0A
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English (en)
French (fr)
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EP3124668A1 (de
Inventor
Marco Rizzi
Paolo Driussi
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Electrolux Appliances AB
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Electrolux Appliances AB
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Priority to EP15178436.0A priority Critical patent/EP3124668B1/de
Priority to AU2016204988A priority patent/AU2016204988B2/en
Publication of EP3124668A1 publication Critical patent/EP3124668A1/de
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Publication of EP3124668B1 publication Critical patent/EP3124668B1/de
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • D06F33/54—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
    • 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
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/06—Type or material
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • D06F2103/14—Supply, recirculation or draining of washing liquid
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/30—Pressure
    • 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
    • D06F2103/40—Opening or locking status of doors
    • 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
    • D06F2103/42—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to filters or pumps
    • 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
    • D06F2103/44—Current or voltage
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/54—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to blowers or fans
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • 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
    • D06F33/74—Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • 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
    • D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers

Definitions

  • the invention relates to a method of operating a washer dryer having a siphon (air trap) in a detergent supply line, where the siphon is filled with water to a minimum level to properly provide an air trap function.
  • the invention also relates to a washer dryer having a control unit implementing a monitoring and siphon filling function.
  • EP 1 715 095 B1 provides a washer dryer having a drum arranged in a tub and a detergent dispenser.
  • a detergent line connects the outlet of the detergent dispenser to the interior of the tub.
  • a siphon is arranged in the detergent line which is filled with water to provide an air-trap function which prevents escape of humid drying air towards the detergent drawer during the drying program.
  • the air pressure in the tub can be measured by a pressure sensor that is provided for detecting the water level during a washing program. It is suggested to include in the drying program a subroutine which is adapted to detect whether the water level within the siphon is sufficient for providing the air-trap function or not.
  • a first pressure value in the tub is detected from the pressure sensor when a fan for circulating the drying air is stopped and a second pressure value is detected when the fan is activated. By the pressure difference of these two values it is concluded whether the water level in the siphon is sufficient for providing the air-trap function.
  • the subroutine is executed, if during a spinning prior to the drying program the drum rotation speed is above a predefined value.
  • the subroutine requires extra time as the fan has to be stopped before re-acceleration such that during the stop phase laundry drying is inefficient.
  • the document EP 1 197 592 A2 describes a combined clothes washing and drying machine comprising a washing product container connected to a conduit in which a siphon is provided.
  • An electromagnetic valve is provided and is opened temporarily before and during the clothes drying phase to re-fill the siphon.
  • the electromagnetic valve can be controlled to open periodically every 20 minutes. The re-filling does not take the filling status of the siphon into account and clothes may be wetted by overflowing water.
  • the document EP 1 302 586 A1 relates to a combined clothes washing and drying machine comprising a detergent dispenser connected to a conduit in which a siphon is provided.
  • a siphon is provided in the combined washing and drying machine.
  • an electromagnetic valve is provided and configured to perform a plurality of functions, including the providing of a predetermined amount of water to fill the siphon
  • the document EP 2843100 A1 discloses another combined washing and drying machine.
  • the invention is defined in claims 1 and 12. Particular embodiments are set out in the dependent claims.
  • a method for operating a washer dryer during a drying program is provided.
  • the drying program is implemented or executed in a washer dryer which comprises: a tub; a drum arranged within the tub and being adapted to receive laundry for drying the laundry using drying air; an air channel adapted to guide the drying air from at least one air outlet at the drum or tub to at least one air inlet at the drum or tub for providing an air circulation arrangement; a drying air fan adapted to convey the drying air through the air circulation arrangement; a detergent dispenser adapted to store at least one agent for a laundry treatment; a liquid connection line connecting at least one outlet of the detergent dispenser to the interior of the tub, wherein the fluid connection line comprises a siphon device, which, when filled with a liquid, provides a siphon function in the liquid passage of the liquid connection line; and a water supply arrangement adapted to supply water to the detergent dispenser and the liquid connection line.
  • the detergent dispenser Preferably by the detergent dispenser one or more detergents and/or laundry treatment agents can be provided into the tub for treating the laundry received in the drum.
  • the detergent(s) or agent(s) may be solid or liquid and are preferably stored in different compartments of the detergent dispenser.
  • the water supply arrangement may comprise plurality of valves for supplying water selectively to each of the compartments.
  • the detergent dispenser and/or the water supply arrangement comprises a channel or line by which water only (e.g. without flushing water through one of the compartments) is supplied to the liquid connection line. Such water only is preferably used to fill or fill-up the water in the siphon device such that it has the water-trap function.
  • 'Supplying water to the detergent supply line' includes supplying the water to the detergent supply line via one or more of the compartments of the detergent dispenser.
  • the water supply arrangement supplies a predetermined amount of water, more preferably a predetermined and adjustable amount of water, to the liquid connection line.
  • the liquid connection line is a detergent hose and/or is flexible to compensate movements of the tub relative to the detergent dispenser (which preferably is arranged stationary within a cabinet of the washer dryer).
  • the siphon device in the liquid connection line is designed such that it provides an air trap in the liquid connection line preventing the exchange of air between the detergent dispenser and the interior of the tub.
  • the siphon device prevents escape of humid and/or fluff-loaded air from the tub towards the detergent dispenser.
  • the method comprises the steps of: starting a drying program for drying the laundry received in the drum; during the running drying program, monitoring at least one operation parameter; evaluating the at least one operation parameter; and, if the evaluation of the at least one operation parameter indicates an incidence which may have affected the liquid level in the siphon device, supplying water to the siphon device by the water supply arrangement.
  • An incidence is an event or an occurrence which is concluded from the at least one monitored operation parameter by the evaluation as a (high) likelihood that the monitored and evaluated at least one parameter gives an indication for an incidence (event) that the water level within the siphon device may have been lowered due to the incidence.
  • Such event may be the opening of the fluff filter cover and/or removal of the fluff filter and/or the stop and/or (re-) acceleration of the fan.
  • Such incidences result in a pressure change of the drying air in the drying air circulation path (e.g. in the tub) which in turn sucks the water stored within the siphon device towards the tub (lower pressure in tub) or pushes it towards the detergent dispenser (higher pressure in tub).
  • Each of the incidences or both in combination may cause a back-forth swinging of the water standing in the siphon device and eventually to an overflow of the water into the tub. Thereby the total amount of water is reduced and the water level in the siphon device may become too low to ensure the water trap function.
  • overflow may happen with a single strong underpressure pulse in the tub such that immediately a larger portion of the water is overflowing.
  • An incidence occurs during the drying operation and is not an incidence that has happened before starting the drying program and/or an incidence that is to happen after the end of the drying program.
  • water may be supplied to the siphon device e.g. at the beginning (before and/or after start) of the drying program and/or after predetermined periods of time (since the last water supply to the siphon device) - i.e. on the basis of a scheduled course of the drying program.
  • the water level is neither directly measured (e.g. by a water level sensor) nor does the (detection/evaluation/water supply) method modify the running drying operation such that an 'artificial' event is generated from which then a conclusion with respect to the correct function of the siphon device is drawn.
  • the incidence is neither initiated nor caused by the control of the washer dryer.
  • the user of the washer dryer interrupting or halting the running drying program or the user removing the fluff filter from the washer dryer are no incidences (events) that are routinely scheduled or controlled by a control unit of the washer dryer that executes the drying program.
  • the parameter time i.e. the arrival at predetermined time points or laps of predetermined time periods, is no parameter whose monitoring can indicate an incidence (at least it can not indicate the incidence alone or as such).
  • the monitored operation parameter is one or more of (a single or an arbitrary combination of two or more of) the following parameters:
  • one or more of the 'signals' are not supplied from a respective sensor, but are generated or provided by the control unit executing and monitoring the drying program.
  • the fan is activated and/or the fan speed is not reduced.
  • 'Activation' of the fan means that the fan is not switched off.
  • the 'fan speed is not reduced' means that fan speed is not zero, i.e. fan is not switched off.
  • the pressure sensor is adapted to detect a signal that is indicative of the drying air pressure during execution of a drying program and is adapted to detect a water level of the water in the tub during a washing program.
  • the pressure sensor is an air pressure sensor detecting the pressure of air (gas) and preferably is in fluid connection with the tub via an air-tight fluid line.
  • the fluid line is connected to a bottom of the tub such that liquid in the tub partially enters the fluid line and increases the pressure in the air column above the liquid level corresponding to the liquid level in the tub (sump).
  • the supply of water to the siphon device is optionally delayed, wherein the delay is dependent on one or more of the following or is one or more of: a predetermined time interval; a predetermined level of fan speed; and a predetermined level of power consumed by the washer dryer or the motor driving the drum or fan.
  • a delay may be required after detection of an incidence, where the act of water overflowing from the siphon device is still in progress or is itself happening delayed with respect to the detected incidence.
  • a pressure fluctuation may cause built up of back-and-forth swinging of the water column in the siphon device, where the overflow of water is still in progress portion by portion or where the main overflow is retarded as compared to the main occurrence of the incidence.
  • an immediate supply of water may result in an (additional) overflow of the currently supplied water or may even amplify swinging of the water column in the siphon device.
  • time or duration of overflow of water may depend on the nominal speed of the fan and the higher the fan speed the later/heavier the overflow after start/activation of the fan.
  • the delay provides that the incidence or the reason for causing the incidence/removal of water from the siphon device is over - e.g.
  • the drying operation is resumed again and the stopped fan is starting, however the fan causes a pressure change that may remove water from the siphon device such that the real incidence in view of water level in siphon device is not the interruption as such, but the acceleration of the fan thereafter.
  • the washer dryer comprises a control unit which is adapted to control execution of the drying program and adapted to monitor the status of washer dryer components.
  • the control unit is adapted to detect/monitor and to evaluate the at least one operation parameter.
  • the control unit is adapted to receive one or more signals representative of the one or more operation parameters; is adapted to evaluate the one or more signals for detecting the incidence; and is adapted to control the water supply arrangement for supplying water in case an incidence which is indicating that the water level in the siphon device may have been affected was detected.
  • an amount of water is supplied to the siphon device, wherein the amount of water or the way of supplying the water is defined by one or more of the following: a predetermined amount of water and the amount of water is controlled by the water supply arrangement supplying the water for a predetermined time period; the water amount is supplied in two or more portions of the amount of water to be filled into the siphon device; and the water amount is supplied until a predetermined level is reached within the siphon.
  • the amount of water may be provided in discrete amounts.
  • the water supply arrangement may be operated repeatedly until the desired predetermined total amount of water is supplied. This avoids 'big' flush that may result in overflow although the maximum filling level is not reached.
  • the supply of discrete amounts of water is such or has a repetition rate such that build-up of a swinging water column in the siphon device is prevented (e.g. no supply period corresponding to the swinging period of the water column).
  • a predetermined level of water in the siphon may be detected by a level sensing device arranged in the siphon or through a pressure sensor adapted to detect a signal that is indicative of the drying air pressure during execution of a drying program.
  • the 'predetermined' amount of water prevents an over-supply or an under-supply and is preferably supplied as follows.
  • the amount of water supplied to the siphon device in response to the incidence is depending on one or more of: the absolute value of the operation parameter monitored for detecting the incidence; a gradient of the value of the operation parameter monitored for detecting the incidence; the magnitude of the change in the value of the operation parameter monitored for detecting the incidence; the direction of change of the value of the operation parameter monitored for detecting the incidence; the duration of the running drying program since the last time of supplying water to the siphon device; and a difference between a maximum value and a minimum value within a given time period.
  • a strong/short pressure change may remove a higher amount of water from the siphon device as compared to a small/gradual pressure change.
  • the evaluation and/or the result of the evaluation is not static but adapted according to settings and/or options and/or detected operation parameters of the drying program.
  • the strength of pressure fluctuation caused by opening the filter compartment may depend on the amount of laundry received in the drum. If e.g. the amount of laundry is low, the pressure fluctuation may be higher as compared to a case where a high amount of laundry (large laundry volume) is in the drum, the latter causing a higher flow resistance and thus a damping of the spreading of the pressure fluctuation through the drying air circulation path.
  • the amount or volume of laundry received in the drum may also have an influence on the pressure fluctuation (change) as caused by starting/stopping the fan.
  • the pressure drop temporally caused may be higher, if a high amount of laundry is in the drum and blocks air flow (bigger volume occupied in the drum results in higher flow resistance and higher amplitudes in pressure change which could lead to more water spill from siphon device).
  • the fluff clogs the fluff filter and although high pressure deviations may be detected/observed in tub, the corresponding pressure deviation is lower at the siphon device
  • the detection or non-detection of an incidence that may have affected the liquid level in the siphon device and/or the amount of water to be supplied to the siphon device by the water supply arrangement is dependent on one or more of the following:
  • the washer dryer further comprises a heat-pump system, wherein the heat pump system comprises at least: a first heat exchanger adapted to heat the drying air; a second heat exchanger adapted to cool the drying air for humidity condensation; and a compressor adapted to circulate refrigerant through the first and second heat exchangers.
  • the heat pump system comprises at least: a first heat exchanger adapted to heat the drying air; a second heat exchanger adapted to cool the drying air for humidity condensation; and a compressor adapted to circulate refrigerant through the first and second heat exchangers.
  • one or more of the following components of the washer dryer are arranged within or at the air channel: a heater for heating the drying air (e.g. the condenser or first heat exchanger of the heat-pump system); a heat exchanger for cooling the drying air (e.g. the evaporator or second heat exchanger of the heat-pump system); a first and second heat exchanger being components of a or the heat pump system; and a or the fluff filter for filtering fluff from the drying air.
  • a heater for heating the drying air e.g. the condenser or first heat exchanger of the heat-pump system
  • a heat exchanger for cooling the drying air e.g. the evaporator or second heat exchanger of the heat-pump system
  • a first and second heat exchanger being components of a or the heat pump system
  • a or the fluff filter for filtering fluff from the drying air.
  • a washer dryer having a control unit for controlling execution of a drying program. Any elements as disclosed above or below with respect of the method may be combined with the washer dryer in any combination of individual elements or any sub-combination of elements. Vice-versa, any element or function disclosed in connection with the washer dryer can be combined individually or in any sub-combination with the method(s) herein.
  • the 'elements' relate to the components or elements of the washer dryer as disclosed above or below in the detailed description.
  • the elements of the washer dryer are adapted to implement the respective method or procedure steps or provide the respective function.
  • the control unit of the washer dryer is adapted to implement/execute method steps as a function thereof. For the details of the elements of the washer dryer full reference is made to the above or below.
  • the washer dryer comprises: a tub; a drum arranged within the tub and being adapted to receive laundry for drying the laundry using drying air; a drying air fan adapted to convey the drying air through the drum; an air channel adapted to guide the drying air from at least one air outlet at the drum or tub to at least one air inlet at the drum or tub for providing an air circulation arrangement; a detergent dispenser adapted to store at least one agent for a laundry treatment; a liquid connection line connecting at least one outlet of the detergent dispenser to the interior of the tub, wherein the fluid connection line comprises a siphon device, which, when filled with a liquid, provides a siphon function in the liquid passage of the liquid connection line; a water supply arrangement adapted to supply water to the detergent dispenser and the liquid connection line; and a control unit controlling the execution of a drying program.
  • the control unit of the washer dryer is adapted to execute the drying program by: starting a drying program for drying the laundry received in the drum; during the running drying program, monitoring at least one operation parameter; evaluating the at least one operation parameter; and if the evaluation of the at least one operation parameter indicates an incidence which may have affected the liquid level in the siphon device, supplying water to the siphon device by the water supply arrangement.
  • a method for operating a washer dryer during a drying program comprises: a tub; a drum arranged within the tub and being adapted to receive laundry for drying the laundry using drying air; an air channel adapted to guide the drying air from at least one air outlet at the drum or tub to at least one air inlet at the drum or tub for providing an air circulation arrangement; a drying air fan adapted to convey the drying air through the air circulation arrangement; a detergent dispenser adapted to store at least one agent for a laundry treatment; a liquid connection line connecting at least one outlet of the detergent dispenser to the interior of the tub, wherein the fluid connection line comprises a siphon device, which, when filled with a liquid, provides a siphon function in the liquid passage of the liquid connection line; and a water supply arrangement adapted to supply water to the detergent dispenser and the liquid connection line.
  • the method comprises: starting a drying program for drying the laundry received in the drum; during the running drying program, monitoring at least one operation parameter; detecting whether the at least one monitored operation parameter indicates an incidence during the running drying program which may have affected the liquid level in the siphon device; and, if such incidence is detected, supplying water to the siphon device by the water supply arrangement.
  • Fig. 1 shows the perspective front view of an illustrative washer dryer 2 for explaining the invention.
  • the washer dryer 2 described here comprises a heat pump system 32 for condensing humidity from the drying air and for heating the drying air.
  • an electrical heater or radiator may be provided for heating the drying air and a heat exchanger (for example an air/air heat exchanger) for cooling the drying air may be provided instead of the heat pump system 32 and its components (see below).
  • the washer dryer 2 has a drum 58 with a horizontal axis or an axis which is inclined relative to the vertical direction, such that the laundry is tumbling within the drum when the drum is rotated.
  • the invention may also be implemented in a washer dryer having a drum rotating around a vertical axis.
  • the washer dryer 2 has a loading opening 4 behind a door 6, wherein laundry 60 is loaded into the drum 58, when the door 6 is opened.
  • the door 6 may be opened by pulling at a handle 8.
  • the outer appearance of the washer dryer 2 is given by a cabinet 10 or housing which comprises a front wall 12, a side wall 14 (the opposing side wall not shown), a top cover 16 and a rear wall and bottom cover (latter two not shown).
  • the upper portion of the front wall 12 comprises a display and input panel 18 having a program selector 20 and several option selectors 22 or buttons.
  • the front wall 12 comprises a fluff compartment cover 24 which covers a filter compartment 25 in which a filter unit 26 or fluff filter is received (see Fig. 2 ).
  • the front wall 12 comprises the front cover of a detergent drawer 28.
  • Fig. 2 shows an exploded perspective view of the washer dryer 2 where the top cover 16 is lifted to enable a view to a top unit 30 which includes a portion of the heat pump system 32.
  • Fig. 2 shows a state, where the filter unit 26 is extracted from the filter compartment 25 by pulling out the filter unit 26 via the fluff compartment cover 24.
  • a mesh filter 26a is provided in the air guiding path towards the heat exchangers.
  • the top unit 30 supports several components of the washer dryer, which are mainly sandwiched between a top shell 34 or cover (which is lifted in this exploded view) and a lower shell 36 or tray.
  • a portion of a drying air channel 50 is formed between the top shell 34 and lower shell 36.
  • the filter compartment 25 is provided where the drying air passes the filter unit 26 and the mesh filter 26a before it enters into the first heat exchanger 38 (which is the evaporator / air humidity condenser of the heat pump system 32) and then enters into a second heat exchanger 40.
  • the second heat exchanger 40 is the condenser of the heat pump system 32 or is replaced by an electrical heater in case no heat pump system is provided in the washer dryer as mentioned above.
  • Fig. 3 shows a perspective view to the lower side of the top unit 30, specifically to the lower side of the lower shell 36.
  • a fan 48 or blower and a fan motor 78 are arranged at the lower side of the lower shell 36 for conveying the drying air within the drying air channel 50.
  • the channel together with the drum 58 and/or tub 52 forms a closed loop for circulating the drying air by the activity of the fan 48.
  • the outer side of a dispenser compartment 92 can be seen in which a detergent dispenser 90 is slidably arranged.
  • an inlet 96 into a detergent supply line 94* is provided at the rear side of the dispenser compartment 92 (when seen from the front side of the washer dryer)
  • the water mixed with the detergent is flushed through the inlet 96 into the detergent supply line 94* from where it is passing through an outlet 98 and from there into the interior of the tub 52.
  • Bellows 100 are provided in the detergent supply line 94* which damp the vibrations of the tub 52 and thus prevent transmission of mechanical movement from the tub 52 to the top unit 30.
  • the detergent supply line 94* has a fluff trap 102* which is not further described here, as according to the present improved washer dryer the fluff trap 102* is replaced by a siphon 102 as shown in Fig. 4 .
  • a portion of the air channel 50 is provided which guides the drying air from the top unit 30 coming from the fan 48 towards a bellows (not shown) forming portion of the loading opening 4 such that the dried and heated drying air is provided from the top unit 30 directly into the interior of the drum 58.
  • the other portion of the air channel 50 which is guiding the drying air from the tub (this portion is connected to the mantle of the tub) towards the top unit 30 and there first through the filter unit 26 is shown in the middle of the top unit 30 partially hidden by the detergent supply line 94*.
  • Fig. 4 shows a detergent supply line 94 which - for the purposes of the invention - is replacing the detergent supply line 94* as shown in Fig. 3 .
  • the inlet 96 from the dispenser 90 is shown and the outlet 98 which is to be connected to the mantle of the tub 52.
  • the fluff trap 102* shown in Fig. 3 is replaced by the siphon 102.
  • the siphon 102 is designed such that the water level WL, which is the maximum water level that can be achieved without the water flowing through the outlet 98 into the tub 52 (overflow), prevents passage of air between the inlet 96 and the outlet 98.
  • the water column if the water column is shifted towards the tub 52, the water can flow over into the tub 52 which reduces the amount of water in the siphon 102 and may finally result in that the actual water level is below the indicated water level WL and the air trap function cannot be provided so that air may pass between the inlet 96 and outlet 98.
  • a minimum level e.g. WL
  • drying air carrying humidity from laundry drying and fluff may exit the tub towards the dispenser compartment and from there into an interior of the cabinet 10 and/or to the exterior of the cabinet 10 such that unwanted contamination by condensate and/or fluff may happen.
  • Fig. 5 schematically shows components of the washer dryer 2.
  • the heat pump system 32 has a refrigerant loop 42 through which the refrigerant is circulated by the pumping activity of a compressor 44.
  • the refrigerant leaving the compressor 44 is flowing through the second heat exchanger, from there through an expansion device 46, from there through the first heat exchanger 38 and then back to a suction inlet of the compressor 44.
  • the drying air A conveyed by the fan 48 is guided in a portion of the channel 50 through an inlet 56 into the tub 52.
  • the washer dryer 2 as shown in Figs.
  • the portion of the drying channel from the fan 48 is guided through a bellows at the front side of the machine, wherein the bellows partially surround the loading opening 4.
  • the bellows or gasket provides the inlet 56 such that the drying air is passed directly into the interior of the drum 58.
  • the drying air having passed the drum 58 is exhausted through an outlet 54 (only schematically shown on the front side).
  • outlet 54 is provided approximately in the middle and upper portion of the mantle of the tub 52. From the outlet 54 the drying air is guided along a portion of channel 50 through the filter unit 26 and the mesh filter 26a from where it is sucked by the activity of the fan 48 through the first and second heat exchangers 38, 40.
  • a filter sensor 27 may be assigned to the filter unit 26 and/or the compartment 25 and/or the cover 24 to detect whether the filter unit is correctly inserted into the compartment and/or whether filter unit is (partially) removed.
  • An electrical heater 62 is arranged in the tub 52 for heating washing liquid.
  • the drum 58 is driven by a drum motor 64 which receives its electrical power from a drum motor inverter 66.
  • the operation of the washer dryer is controlled by a control unit 68 which comprises a memory 70 ( Fig. 6 ) in which different program parameters for different programs and different program options are stored.
  • the compressor 44 is powered by a compressor inverter 72 that is controlled by the control unit 68 as shown in Fig. 6 .
  • a pressure sensor 74 is connected by a connection line 76 to the bottom or sump of the tub 52 such that either the pressure of the air within the tub 52 or the pressure caused by the liquid stored in the tub 52 can be detected.
  • the signal of the pressure sensor 74 is provided to the control unit 68.
  • Liquid stored in the tub 52 can be drained by a draining pump 80 to the outside of the cabinet 10. Draining activity of the pump 80 is controlled by the control unit 68 in dependency of the water level detected by the pressure sensor 74 (e.g. activation when a predetermined water level is exceeded) and/or at specific program routines (e.g. for draining the washing liquid or for draining water expelled during a spinning cycle) and/or for draining condensate that has collected in the sump of the tub 52.
  • specific program routines e.g. for draining the washing liquid or for draining water expelled during a spinning cycle
  • the temperature of the drying air can be detected by a drying air temperature sensor 82 which is e.g. arranged at or close to the inlet 56 and which sends the temperature signal to the control unit 68. Further, a water supply device 84 is provided which is connected to a household water tap for supplying water to the different detergent compartments within the detergent dispenser 90 under the control of the control unit 68.
  • a secondary air duct may be provided to draw some ambient air A AIR into the drying air channel 50.
  • the air drawn into the channel 50 cannot escape through the detergent supply line 94, as the siphon 102 and the water level WL therein prevent air exchange therethrough (in case that the desired water level at WL is set).
  • the air A AIR drawn in by such secondary air duct may be exhausted via an intentional leak passage which for example is provided at the channel portion close to the filter unit 26.
  • an exhaust air passage is arranged at the filter compartment 25 and is connecting the interior of the channel 50 to the outside of the cabinet 10.
  • the flow rate of the outside air circulation e.g.
  • the draining pump 80 may be activated by the control unit 68 in case that a water level at the sump of the tub is detected via the pressure sensor 74 requiring draining of the water to the exterior of the cabinet 10.
  • Fig. 6 shows in a simplified block diagram the structure of controlling the components of the washer dryer 2 by the control unit 68 and of providing control signals (parameters) to the control unit. Reference is made to the above. In short the control unit controls:
  • the filter unit 26 is replaced by a water spray-operated fluff filter, or such a water-operated fluff filter is additionally provided to remove the fluff from the air transported in the channel section between the drum 58 and the first heat exchanger 38. Due to the water flow from such water-operated fluff filter, water collects in the sump of the tub and the draining pump 80 has to be repeatedly operated for removing the collected water from fluff filtering and from condensation. Also in such incidences the water volume sucked out of the sump by the draining pump 80 may result in temporary underpressure within the tub 52 which results in the water from the siphon 102 overflowing into the tub.
  • control unit 68 detects the operation of the draining pump 80 activated under its control and such detection of such an incidence, that may have caused overflow of water from the siphon 102, is effecting the control unit 68 to activate the water supply device 84 to supply water into the siphon 102.
  • the draining pump is activated, a delay is introduced before starting with water supply or the water supply is started when the draining pump is deactivated.
  • the pressure signal from the pressure sensor 74 can be monitored. From monitoring and evaluating this signal it can be determined therefrom, whether there was an incidence or event which required filling of water into the siphon 102.
  • the control unit 68 can for example determine that the draining pump was activated and the pressure signal has to be evaluated applying specific evaluation parameters that are convenient for the incidence draining of water. For example, the threshold values of pressure and/or the duration of pressure variation and/or the direction of pressure increase or decrease may be different under the training activity as compared to opening the filter compartment. Thereby that it is differentiated in the evaluation of the pressure variation, whether it is caused by draining or fluff compartment opening to conclude that water supply via the water supply device 84 is required or not.
  • the evaluation of parameters which might be different in dependency of the above dependencies may relate to one or more of:
  • Fig. 7 shows a time diagram of the behavior of the fan speed FS and the amount WO of water overflowing from the siphon 102 towards the sump as well as a water filing sequence Fill executed by the water supply device 84 under the control of the control unit 68.
  • the curve FS after a stop of the fan 48, the fan is restarted or activated and the rotation speed increases from zero to the nominal rotation speed which here is 4000 rpm as an example.
  • the time when the fan 48 has reached its nominal speed is indicated by the vertical line in the diagram.
  • the start of the fan creates a pressure variation within the tub 52 such that the pressure difference between the interior of the tub 52 and the outside of the cabinet 10 cannot be equalized within short time, such that the pressure difference pushes and pulls the water column in the siphon 102 and water flows over into the tub.
  • the pressure difference causes an overflow of water WO which is somewhat delayed as compared to the start of the fan curve and which ends about the time when the fan reaches its nominal speed.
  • a refill sequence Fill is executed to replenish the water in the siphon 102 up to the water level WL shown in Fig. 4 . Thereby, the air trap function by the siphon 102 is re-established.
  • a delay is provided between detection of the incidence or event that could have caused the water column in the siphon 102 to overflow, and the time of starting supply of water into the siphon 102.
  • the illustrated reason is that the start of the fan does not necessarily mean that water removal from the siphon 102 is over, but it may mean that the water overflow from the siphon has started or is still in progress after the initial event is already over.
  • the pressure signal by the pressure sensor 74 is additionally monitored by the control unit 68 when the water supply to the siphon 102 via the water supply device 84 has been started. Then, by analyzing the temporal pressure course it can be detected (e.g. by detecting occurrence of a (further) pressure variation) whether the air trapping function of the siphon 102 is re-established. Such pressure variation indicates that a slight pressure difference between the outside pressure (which is existing in the interior of the tub 52, if the water column in the siphon 102 does not guarantee air trapping) is provided again.
  • the fan is only started at the beginning where also the water fill is performed to guarantee that the siphon 102 provides the air trap function from the beginning. Then normally the fan 48 is not stopped, but operated continuously during the drying program. Thus normally no pressure variation is caused due to lack of stopping and/or restarting the fan. However, if there is a power failure or power irregularities from the electricity grid or if the user opens the door or selects a pause of the drying program, or if a malfunction of one or more component of the washer dryer is signaled, the fan is stopped and is restarted when the drying program is resumed. At such incidences water is overflowing out of the siphon 102 and water has to be replenished as illustrated by the examples of Figs. 7 and 8 .
  • Fig. 8 is a time diagram indicating the air pressure within the tub 52 detected by the pressure sensor 74.
  • the control unit 68 can detect the occurrence and end of an incidence which effected a water overflow from the siphon 102. When this period is terminated the water-refill sequence can be initiated.
  • At least one operation parameter is monitored and evaluated.
  • the evaluation results in an indication that there was an incidence which may have resulted in overflow of the water column from the siphon, water is supplied to the siphon to make sure that the air trap function is active or present.
  • a washer dryer having a control unit implementing such method for controlling a drying operation.
  • the method provides starting a drying program for drying the laundry received in the drum; during the running drying program, monitoring at least one operation parameter; detecting whether the at least one monitored operation parameter indicates an incidence during the running drying program which may have effected the liquid level in the siphon device; and, if such incidence is detected supplying water to the siphon device by the water supply arrangement.
  • Reference Numeral List 2 washer dryer 58 drum (laundry compartment) 4 loading opening 60 laundry 6 door 62 electrical heater 8 handle 64 drum motor 10 cabinet/ housing 66 drum motor inverter 12 front wall 68 control unit 14 side wall 70 memory 16 top cover 72 compressor inverter 18 display and input panel 74 pressure sensor 20 program selector 76 connection line 22 option selectors 78 fan motor 24 fluff compartment cover 80 draining pump 25 filter compartment 82 drying air temperature sensor 26 filter unit/fluff filter 84 water supply device 26a mesh filter 90 detergent dispenser 27 filter sensor 92 dispenser compartment 28 detergent drawer 94, 94* detergent supply line 30 top unit 96 inlet from dispenser 32 heat pump system 98 outlet to tub 34 top shell/cover 100 bellows 36 lower shell/tray 102* fluff trap 38 first heat exchanger (evaporator) / air humidity condenser 102 siphon 40 second heat exchanger (condenser) / electrical heater A drying air flow Fill water supply 42 refrigerant loop FS fan speed 44 compressor I incidence 46 expansion device WL water level 48

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (13)

  1. Verfahren zum Betreiben eines Waschtrockners während eines Trocknungsprogramms, wobei der Waschtrockner (2) Folgendes umfasst:
    eine Wanne (52),
    eine Trommel (58), angeordnet innerhalb der Wanne (52) und dazu angepasst, Wäsche (60) aufzunehmen, um Wäsche unter Verwendung von Trocknungsluft zu trocknen,
    einen Luftkanal (50), angepasst zum Führen der Trocknungsluft von zumindest einem Luftauslass (54) an der Trommel (58) oder Wanne (52) zu zumindest einem Lufteinlass (56) an der Trommel oder Wanne zum Bereitstellen einer Luftumwälzanordnung,
    ein Trocknungsluftgebläse (48), angepasst zum Fördern der Trocknungsluft durch die Luftumwälzanordnung,
    einen Waschmittelspender (90), angepasst zum Speichern zumindest eines Mittels für eine Wäschebehandlung,
    eine Flüssigkeitsverbindungsleitung (94), die zumindest einen Auslass des Waschmittelspenders (90) mit dem Inneren der Wanne (52) oder Trommel (58) verbindet, wobei die Flüssigkeitsverbindungsleitung eine Siphonvorrichtung (102) umfasst, die, wenn mit einer Flüssigkeit gefüllt, eine Siphonfunktion im Flüssigkeitsdurchgang der Flüssigkeitsverbindungsleitung (94) bereitstellt, und
    eine Wasserzufuhranordnung (84) angepasst zum Zuführen von Wasser zum Waschmittelspender (90) und zur Flüssigkeitsverbindungsleitung (94),
    wobei das Verfahren Folgendes umfasst:
    Starten eines Trocknungsprogramms zum Trocknen der in der Trommel (58) aufgenommenen Wäsche,
    während des Ausführens des Trocknungsprogramms, Überwachen von zumindest einem Betriebsparameter, und Evaluieren des zumindest einen Betriebsparameters,
    dadurch gekennzeichnet, dass das Verfahren ferner Folgendes umfasst:
    wenn die Evaluierung des zumindest einen Betriebsparameters ein Ereignis anzeigt, das den Flüssigkeitspegel in der Siphonvorrichtung (102) beeinflusst haben kann, Zuführen von Wasser zur Siphonvorrichtung durch die Wasserzufuhranordnung (84),
    wobei der überwachte Betriebsparameter einer oder mehrere aus Folgenden ist:
    - einem Sensorsignal, bereitgestellt durch einen Türöffnungssensor des Waschtrockners, wobei der Türöffnungssensor angepasst ist zum Detektieren, ob eine Tür (6) zum Schließen der Ladeöffnung (2) der Trommel (58) geschlossen oder geöffnet ist,
    - einem Sensorsignal, bereitgestellt durch einen Filtersensor (27) des Waschtrockners, wobei der Filtersensor angepasst ist zum Detektieren, ob ein Flusenfilter (26) des Waschtrockners zum Filtern der Trocknungsluft aus seiner Betriebsposition entfernt ist, oder angepasst ist zum Detektieren, ob ein Fach (25) zum Aufnehmen des Flusenfilters geöffnet ist,
    - einem Signal, das eine durch einen Benutzer ausgewählte Programmpause anzeigt oder eine Programmunterbrechung während des laufenden Trocknungsprogramms anzeigt,
    - einem Signal, das das Wiederaufnehmen der Trocknungsoperation durch das Trocknungsprogramm nach einer Unterbrechung oder einer vom Benutzer ausgewählten Pause des laufenden Trocknungsprogramms anzeigt,
    - einem Signal, das einen Leistungsausfall oder Leistungsunregelmäßigkeiten in der Stromversorgung des Waschtrockners anzeigt, oder einem Signal, das das Ende eines Leistungsausfalls oder von Leistungsunregelmäßigkeiten anzeigt,
    - einem Signal, das eine Fehlfunktion des Waschtrockners oder einer Komponente davon anzeigt,
    - einem Signal, das die Temperatur (82) der Trocknungsluft anzeigt oder das eine zeitweilige Änderung der Temperatur der Trocknungsluft anzeigt,
    - einem Drucksignal, detektiert durch einen Drucksensor (74) des Waschtrockners, wobei der Drucksensor angepasst ist zum Detektieren des Luftdrucks der Trocknungsluft, und wobei während der Periode des Detektierens des Drucksignals vom Drucksensor (74) zur Evaluierung des zumindest einen Betriebsparameters das Gebläse (48) eingeschaltet oder aktiv ist oder die Gebläsedrehzahl nicht verringert ist, und
    - einem Signal, das den Betrieb einer Abflusspumpe (80) des Waschtrockners anzeigt, wobei die Abflusspumpe angepasst ist zum Abpumpen von Kondensatwasser oder Waschflüssigkeit aus dem Waschtrockner.
  2. Verfahren nach Anspruch 1, wobei Evaluieren des zumindest einen Betriebsparameters umfasst zu detektieren, ob der zumindest eine überwachte Betriebsparameter ein Ereignis während des laufenden Trocknungsprogramms anzeigt, das den Flüssigkeitspegel in der Siphonvorrichtung (102) beeinflusst haben kann.
  3. Verfahren nach Anspruch 1 oder 2, wobei der Drucksensor (74) angepasst ist zum Detektieren eines Signals, das indikativ für den Trocknungsluftdruck während Ausführung eines Trocknungsprogramms ist, und angepasst ist zum Detektieren eines Wasserpegels des Wassers in der Wanne (52) während eines Waschprogramms.
  4. Verfahren nach Anspruch 1, 2 oder 3, wobei, wenn die Evaluierung des zumindest einen Betriebsparameters das Ereignis anzeigt, die Zufuhr von Wasser zur Siphonvorrichtung (102) verzögert wird, wobei die Verzögerung vorzugsweise eines oder mehrere aus Folgendem ist oder von einem oder mehreren aus Folgendem abhängig ist:
    einem vorbestimmten Zeitintervall,
    einem vorbestimmten Niveau der Gebläsedrehzahl, und
    einem vorbestimmten Niveau der Leistung, die durch den Waschtrockner oder den Motor (64, 78), der die Trommel (58) oder das Gebläse (48) antreibt, verbraucht wird.
  5. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 4, ferner umfassend eine Steuereinheit (68),
    wobei die Steuereinheit angepasst ist zum Empfangen von einem oder mehreren Signalen, die repräsentativ für den einen oder die mehreren Betriebsparameter sind,
    wobei die Steuereinheit angepasst ist zum Evaluieren des einen oder der mehreren Signale zum Detektieren des Ereignisses, und
    wobei die Steuereinheit angepasst ist zum Steuern der Wasserzufuhranordnung (84) zum Zuführen von Wasser in dem Fall, dass ein Ereignis detektiert wird, das anzeigt, dass der Wasserpegel in der Siphonvorrichtung (102) beeinflusst worden sein könnte.
  6. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Menge von Wasser, die der Siphonvorrichtung (102) zugeführt wird:
    eine vorbestimmte Menge von Wasser ist und die Menge von Wasser durch die Wasserzufuhranordnung (84) gesteuert wird, die das Wasser für eine vorbestimmte Zeitspanne zuführt,
    in zwei oder mehr Teilen der Menge von Wasser zugeführt wird, die in die Siphonvorrichtung (102) zu füllen ist, und/oder
    zugeführt wird, bis ein vorbestimmter Wasserpegel innerhalb des Siphons erreicht ist.
  7. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Menge von Wasser, die der Siphonvorrichtung (102) in Reaktion auf das Ereignis zugeführt wird, von einem oder mehreren aus Folgendem abhängt:
    dem Absolutwert des überwachten Betriebsparameters zum Detektieren des Ereignisses,
    einem Gradienten des Wertes des überwachten Betriebsparameters zum Detektieren des Ereignisses,
    der Größe der Änderung im Wert des überwachten Betriebsparameters zum Detektieren des Ereignisses,
    der Richtung der Änderung des Wertes des überwachten Betriebsparameters zum Detektieren des Ereignisses,
    der Dauer des laufenden Trocknungsprogramms, seitdem das letzte Mal Wasser zur Siphonvorrichtung (102) zugeführt wurde, und
    einer Differenz zwischen einem maximalen Wert und einem minimalen Wert innerhalb einer gegebenen Zeitspanne.
  8. Verfahren nach einem der vorhergehenden Ansprüche, wobei bei der Evaluierung des zumindest einen Betriebsparameters die Detektion oder Nichtdetektion des Ereignisses, das den Flüssigkeitspegel in der Siphonvorrichtung (102) beeinflusst haben kann, oder die Menge von Wasser, die der Siphonvorrichtung durch die Wasserzufuhranordnung (84) zuzuführen ist, von einem oder mehreren aus Folgendem abhängig ist:
    - dem Wäschetrocknungsprogramm oder einer durch einen Benutzer über einen Eingabewähler (18) des Waschtrockners festgelegten Wäschetrocknungsoption,
    - der Menge oder dem Gewicht der zu trocknenden Wäsche (60),
    - der Nenndrehzahl, mit der das Gebläse (48) während des Trocknungsprogramms zu betreiben ist,
    - der aktuellen Drehzahl des Gebläses (48) zum Zeitpunkt des Bestimmens des Ereignisses,
    - dem aktuellen Grad an Feuchtigkeit der Wäsche,
    - der Temperatur der Trocknungsluft,
    - einem Wäschetyp, wie durch einen Benutzer festgelegt oder wie durch den Waschtrockner oder eine Steuereinheit (68) davon geschätzt,
    - der Dauer seit dem Start des Trocknens, und
    - der Dauer des Wäschetrocknungsprogramms, wie durch einen Benutzer festgelegt oder wie durch den Waschtrockner oder eine Steuereinheit (68) davon geschätzt,
  9. Verfahren nach einem der vorhergehenden Ansprüche, ferner umfassend ein Wärmepumpensystem (32), wobei das Wärmepumpensystem zumindest Folgendes umfasst:
    einen ersten Wärmetauscher (40), angepasst zum Erwärmen der Trocknungsluft,
    einen zweiten Wärmetauscher (38), angepasst zum Kühlen der Trocknungsluft zum Kondensieren von Feuchtigkeit, und
    einen Kompressor (44), angepasst zum Zirkulieren von Kältemittel durch den ersten und den zweiten Wärmetauscher (38, 40).
  10. Verfahren nach einem der vorhergehenden Ansprüche, wobei eines oder mehrere aus Folgendem innerhalb oder am Luftkanal (50) angeordnet sind:
    ein Heizer (40) zum Erwärmen der Trocknungsluft,
    ein Wärmetauscher (38) zum Kühlen der Trocknungsluft,
    ein erster und zweiter Wärmetauscher (38, 40), die Komponenten eines oder des Wärmepumpensystems (32) sind, und
    ein oder der Flusenfilter (26) zum Filtern von Flusen aus der Trocknungsluft.
  11. Verfahren nach einem der vorhergehenden Ansprüche, wobei nach der Detektion eines Ereignisses und nach dem Start des Zuführens von Wasser zur Siphonvorrichtung oder während des Zuführens von Wasser zur Siphonvorrichtung das Drucksignal des Drucksensors (74) evaluiert wird, um zu detektieren, ob eine Änderung des Drucksignals Wiederherstellung einer Luftfallenfunktion der Siphonvorrichtung anzeigt.
  12. Waschtrockner, der Folgendes umfasst:
    eine Wanne (52),
    eine Trommel (58), angeordnet innerhalb der Wanne (52) und dazu angepasst, Wäsche (60) aufzunehmen, um Wäsche unter Verwendung von Trocknungsluft zu trocknen,
    ein Trocknungsluftgebläse (48), angepasst zum Fördern der Trocknungsluft durch die Trommel (58),
    einen Luftkanal (50), angepasst zum Führen der Trocknungsluft von zumindest einem Luftauslass (54) an der Trommel (58) oder Wanne (52) zu zumindest einem Lufteinlass (56) an der Trommel oder Wanne zum Bereitstellen einer Luftumwälzanordnung,
    einen Waschmittelspender (90), angepasst zum Speichern zumindest eines Mittels für eine Wäschebehandlung,
    eine Flüssigkeitsverbindungsleitung (94), die zumindest einen Auslass des Waschmittelspenders (90) mit dem Inneren der Wanne (52) oder Trommel (58) verbindet, wobei die Flüssigkeitsverbindungsleitung eine Siphonvorrichtung (102) umfasst, die, wenn mit einer Flüssigkeit gefüllt, eine Siphonfunktion im Flüssigkeitsdurchgang der Flüssigkeitsverbindungsleitung (94) bereitstellt,
    eine Wasserzufuhranordnung (84) angepasst zum Zuführen von Wasser zum Waschmittelspender (90) und zur Flüssigkeitsverbindungsleitung (94), und
    eine Steuereinheit (68), die die Ausführung eines Trocknungsprogramms steuert, wobei die Steuereinheit angepasst ist zum Ausführen des Trocknungsprogramms durch:
    Starten eines Trocknungsprogramms zum Trocknen der in der Trommel aufgenommenen Wäsche,
    während des Ausführens des Trocknungsprogramms, Überwachen von zumindest einem Betriebsparameter, und Evaluieren des zumindest einen Betriebsparameters,
    dadurch gekennzeichnet, dass die Steuereinheit (68) ferner angepasst ist zum Ausführen des Trocknungsprogramms durch:
    wenn die Evaluierung des zumindest einen Betriebsparameters ein Ereignis anzeigt, das den Flüssigkeitspegel in der Siphonvorrichtung (102) beeinflusst haben kann, Zuführen von Wasser zur Siphonvorrichtung durch die Wasserzufuhranordnung (84),
    wobei der überwachte Betriebsparameter einer oder mehrere aus Folgenden ist:
    - einem Sensorsignal, bereitgestellt durch einen Türöffnungssensor des Waschtrockners, wobei der Türöffnungssensor angepasst ist zum Detektieren, ob eine Tür (6) zum Schließen der Ladeöffnung (4) der Trommel (58) geschlossen ist oder nicht,
    - einem Sensorsignal, bereitgestellt durch einen Filtersensor (27) des Waschtrockners, wobei der Filtersensor angepasst ist zum Detektieren, ob ein Flusenfilter (26) des Waschtrockners zum Filtern der Trocknungsluft aus seiner Betriebsposition entfernt ist, oder angepasst ist zum Detektieren, ob ein Fach (25) zum Aufnehmen des Flusenfilters geöffnet ist,
    - einem Signal, das eine durch einen Benutzer ausgewählte Programmpause anzeigt oder eine Programmunterbrechung während des laufenden Trocknungsprogramms anzeigt,
    - einem Signal, das das Wiederaufnehmen der Trocknungsoperation durch das Trocknungsprogramm nach einer Unterbrechung oder einer vom Benutzer ausgewählten Pause des laufenden Trocknungsprogramms anzeigt,
    - einem Signal, das einen Leistungsausfall oder Leistungsunregelmäßigkeiten in der Stromversorgung des Waschtrockners anzeigt, oder einem Signal, das das Ende eines Leistungsausfalls oder von Leistungsunregelmäßigkeiten anzeigt,
    - einem Signal, das eine Fehlfunktion des Waschtrockners oder einer Komponente davon anzeigt,
    - einem Signal, das die Temperatur der Trocknungsluft anzeigt oder das eine zeitweilige Änderung der Temperatur der Trocknungsluft anzeigt,
    - einem Drucksignal, detektiert durch einen Drucksensor (74) des Waschtrockners, wobei der Drucksensor angepasst ist zum Detektieren des Luftdrucks der Trocknungsluft, und wobei während der Periode des Detektierens des Drucksignals vom Drucksensor (74) zur Evaluierung des zumindest einen Betriebsparameters das Gebläse (48) eingeschaltet oder aktiv ist oder die Gebläsedrehzahl nicht verringert ist, und
    - einem Signal, das den Betrieb einer Abflusspumpe (80) des Waschtrockners anzeigt, wobei die Abflusspumpe angepasst ist zum Abpumpen von Kondensatwasser oder Waschflüssigkeit aus dem Waschtrockner.
  13. Waschtrockner (2) nach Anspruch 12, wobei die Steuereinheit (68) angepasst ist zum Steuern des Trocknungsprogramms nach einem der vorhergehenden Ansprüche 1 bis 11.
EP15178436.0A 2015-07-27 2015-07-27 Trocknungsverfahren für waschtrockner mit siphonbefüllung und waschtrockner Active EP3124668B1 (de)

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AU2016204988A AU2016204988B2 (en) 2015-07-27 2016-07-15 Drying Method for Washer Dryer with Siphon Filling

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KR102526714B1 (ko) 2018-02-23 2023-04-28 엘지전자 주식회사 세탁기
CN112080915B (zh) * 2019-06-13 2023-08-15 松下家电(中国)有限公司 家用电器的储水盒水位检测系统、水位检测方法及干衣机
CN114351403A (zh) * 2020-10-13 2022-04-15 青岛海尔洗衣机有限公司 一种洗衣机控制方法、装置、存储介质及洗衣机

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ITPN20000059A1 (it) * 2000-10-10 2002-04-10 Electrolux Zanussi Elettrodome Macchina lavatrice-asciugatrice di biancheria combinata
ITPN20010070A1 (it) * 2001-10-10 2003-04-10 Electrolux Zanussi Elettrodome Macchina lavatrice-asciugatrice di biancheria
DE102005018550B3 (de) 2005-04-20 2005-12-08 Miele & Cie. Kg Verfahren zur Steuerung der Wasserzufuhr zum Laugenbehälter eines Waschtrockners
EP2843100B1 (de) 2013-08-30 2017-08-09 Electrolux Appliances Aktiebolag Waschtrockner mit Wasserfilter

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