EP3375930A2 - Procédé de séchage de linge, procédé de commande et dispositif de commande permettant de commander un processus de séchage et sèche-linge - Google Patents

Procédé de séchage de linge, procédé de commande et dispositif de commande permettant de commander un processus de séchage et sèche-linge Download PDF

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Publication number
EP3375930A2
EP3375930A2 EP18155788.5A EP18155788A EP3375930A2 EP 3375930 A2 EP3375930 A2 EP 3375930A2 EP 18155788 A EP18155788 A EP 18155788A EP 3375930 A2 EP3375930 A2 EP 3375930A2
Authority
EP
European Patent Office
Prior art keywords
drum
laundry
washer
dryer
tub
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.)
Withdrawn
Application number
EP18155788.5A
Other languages
German (de)
English (en)
Other versions
EP3375930A3 (fr
Inventor
Dirk Sieding
Alexander Löffler
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Publication of EP3375930A2 publication Critical patent/EP3375930A2/fr
Publication of EP3375930A3 publication Critical patent/EP3375930A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • D06F2103/18—Washing liquid level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/26—Heat 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
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity

Definitions

  • the invention relates to a method for drying laundry for a washer-dryer, a control method and a control device for controlling a drying process of a washer-dryer and a washer-dryer.
  • a washer-dryer is a combination of, for example, a condensation dryer and a washing machine.
  • the object of the invention is to provide an improved method for drying laundry, an improved control method and an improved control device for controlling a drying process of a washer-dryer and an improved washer-dryer.
  • this object is achieved by a method for drying laundry, a control method and a control device for controlling a drying process of a washer-dryer and a washer-dryer with the features of the main claims.
  • a liquid present in a lye container can be used as a condensation surface in order to condense water vapor leaving the laundry to be dried. This allows a simple drying process.
  • the washer-dryer can be, for example, a household appliance which is designed both for washing and for drying laundry.
  • a The washer-dryer may be equipped with a condensation device known from known washer-dryers or dryers, for example heat pump dryers or condensation dryers.
  • the method makes it possible to extend a known washer-dryer by an additional drying function, which can be used in addition to or as an alternative to drying the laundry using the condensation device.
  • the condensation device can be used as a condenser or as a condensation surface, for example of metal or another good heat conducting material, be formed or comprise such a capacitor or such a condensation surface.
  • the condensation device can also be formed by an evaporator of a heat pump or comprise such an evaporator.
  • the liquid template can be formed for example by water or a wash liquor.
  • the condensation can be done for example on a cold water supply.
  • the liquid reservoir can be formed by supplying liquid into the tub or by maintaining or removing liquid already in the tub so that a level of the liquid in the tub is adjusted so that the liquid is only in one below the drum located portion of the tub. In particular, the level can be set so that the drum does not come into contact with the liquid even with a rotation of the drum.
  • the step of introducing the heat energy can be introduced into a wall of the drum or into the interior of the drum. Due to the heat energy, the laundry located in the drum can be heated directly or indirectly, so that moisture in the laundry can evaporate. The resulting water vapor can escape from the drum and condense on the surface of the liquid reservoir and be bound. In this way, the laundry can be dried.
  • the heat input can be provided by means of suitable methods, for example by means of induction, hot air or heat radiation.
  • the method may include a step of diverting air passing through the drum to the condensing device. In this way, at least a portion of the water vapor can condense in the condenser.
  • the deriving step may be performed prior to, during, and / or after the step of forming the liquid master. In this way, the drying process can be optimized.
  • the method may include a step of cooling the condensing device using a refrigerant.
  • the refrigerant may be, for example, a refrigerant of a heat pump or cold water.
  • the method may include a step of removing the liquid reservoir from the tub.
  • the liquid template can be removed, for example, when the drying process is completed or when the liquid reservoir has reached a temperature that prevents or impedes further condensation of water vapor. If the drying process has not yet ended, the liquid template can be replaced, for example by cold water.
  • the process may include re-executing the steps of forming a liquid reservoir, and optionally additionally, introducing heat energy into the drum. The steps of the process can be repeated until the laundry has reached the desired degree of drying.
  • the method may include a step of detecting at least one temperature value representing a temperature within the tub.
  • the step of removing and / or re-executing the steps of forming and introducing may be performed using the at least one temperature value.
  • the steps may be performed depending on a result of a comparison of the at least one temperature value with at least one threshold value. By monitoring the temperature, a current pass of the drying process may be continued until the temperature has reached a predetermined maximum threshold.
  • a temperature of the liquid template can be detected. In this way it can be checked whether the liquid original is still cool enough to condense more water vapor. Additionally or alternatively, a temperature of the drum is detected. By way of example, the temperature of the drum can be used to conclude a progress of the evaporation process taking place within the drum.
  • the method may include a step of detecting a level value representing a level of the liquid reservoir. In this way, it can be checked whether the level is still low enough so that contact between the drum and liquid is avoided. Accordingly, the step of removing and / or re-executing the steps of forming and introducing may be performed using the level value.
  • the method may include a step of stopping the introduction of the thermal energy. In this way, for example, overheating of the laundry can be avoided. Further, the method may include a step of spinning the laundry after the step of stopping the introduction of the heat energy. By spinning, more moisture can be removed from the laundry. In one embodiment, the steps of spinning and removing the liquid master are performed simultaneously.
  • the heat energy can be introduced in the step of introduction by induction.
  • the drum and over the drum located in the drum laundry can be heated very quickly.
  • the heat energy can be introduced by hot air.
  • the warm air may for example be part of an air flow guided via the condensation device.
  • control method In order to implement the steps of the described method using a household appliance, a control method can be used.
  • the control method may be carried out using, for example, a suitable control device of the household appliance.
  • the pump signal and the heat signal may be electrical control signals.
  • the pumping means can be controlled so that liquid is let into the tub or pumped out of the tub as long as the liquid reservoir has a level at which it is ensured that drum and liquid do not touch.
  • the heater may be energized to provide sufficient heat energy to heat the laundry in the drum to vaporize moisture absorbed by the laundry.
  • further control signals can be provided or control signals already provided once can be provided again.
  • the approach presented here also creates a control device which is designed to execute, to control or to implement the steps of a variant of a method presented here in corresponding devices. Also by this embodiment of the invention in the form of a device, the object underlying the invention can be solved quickly and efficiently.
  • the apparatus may be configured to read in input signals and to determine and provide output signals using the input signals.
  • An input signal can represent, for example, a sensor signal which can be read in via an input interface of the device.
  • An output signal may represent a control signal or a data signal that may be provided at an output interface of the device.
  • the apparatus may be configured to determine the output signals using a processing instruction implemented in hardware or software.
  • the device may for this purpose comprise a logic circuit, an integrated circuit or a software module and be implemented, for example, as a discrete component or be comprised by a discrete component.
  • a computer program product or computer program with program code which can be stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory.
  • a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory.
  • the program product or program may be used to perform, implement, and / or control the steps of the method of any of the embodiments described above.
  • a washer-dryer may comprise a said control device.
  • the washer-dryer can be equipped with the functionality described herein for drying laundry.
  • the washer-dryer can be, for example, a condensation dryer or a heat pump dryer with additional functionality for washing the laundry.
  • the condenser may be formed as an evaporator of a heat pump or as a condenser.
  • a domestic appliance the method described here can be used correspondingly in connection with a commercial or professional appliance, for example a medical appliance, such as a washer or disinfector, a small sterilizer, a large-scale disinfector or a container washer ,
  • a medical appliance such as a washer or disinfector, a small sterilizer, a large-scale disinfector or a container washer ,
  • FIG. 1 shows a washer-dryer 100 according to an embodiment.
  • the washer-dryer 100 is embodied here by way of example as a washer-dryer 100 with water condensation.
  • the washer-dryer 100 has a drum 104 and a door 106. Through the door 106, the laundry 102 can be inserted into the drum 104.
  • the drum 104 is rotatably disposed within a tub 108 of the washer dryer 100. In the tub 108, during a washing process carried out by the washer-dryer 100, washing liquor is provided for washing the laundry 102.
  • the wash liquor may be pumped out using a pumping device 110.
  • the washer-dryer 100 also has a heating device 112, by means of which heat energy can be introduced into the drum 104.
  • a temperature sensor 114 is disposed at a bottom of the tub 108 and configured to detect the temperature of the wash liquor or generally the free liquor in the tub 108.
  • the household appliance 100 has a control unit 116, which is also referred to as a control device or electronics, or comprises such a control device or electronics.
  • the washer-dryer 100 has a recirculating air duct 120, through which air can be fed from the drum 104 along a condenser 124 and the heater 112 back to the drum 104 using a fan 122.
  • the heating device 112 is designed as a heater and the condensation device 124 as a device for water condensation, such as in known washing dryers with Water condensation is used.
  • the condensation device 124 is designed to dehumidify air flowing past the condensation device 124 by condensing water vapor, which is carried along by the passing air, at the condensation device 124.
  • a refrigerant for example cold water, is used.
  • the heater 112 is configured to heat the air flowing through the recirculating air passage 120 before re-entering the drum 104.
  • the household appliance 100 is designed to carry out a further drying process in addition to the drying process that can be carried out using the condensation device 124.
  • the laundry 102 can be dried in addition to or as an alternative to drying using the condensation device 124.
  • the further drying process is based on the fact that water vapor leaving the laundry 102 condenses on a liquid receiver 118 located in the tub 108.
  • the liquid receiver 118 can be considered a dehumidifier.
  • the liquid receiver 118 can be made of cold water, so that condensation takes place in the dry process in a cold water supply in the domestic appliance 100.
  • the liquid receiver 118 is first formed. This can be done by, for example, filling fresh water into the tub 108. If liquid is already present in the tub 108, it may optionally be used as the liquid receiver 118 when the temperature of the liquid is cool enough to allow the condensation of water vapor.
  • the liquid receiver 118 is formed so that a level of the liquid receiver 118 is adjusted so that the drum 104 does not come into contact with the liquid of the liquid receiver 118.
  • the heating device 112 the laundry 102 is heated during the further drying process so far that moisture contained in the laundry 102 evaporates. The water vapor which forms can escape from the drum 104 and condense on the surface of the liquid receiver 118.
  • another heater may be used to heat the laundry 102 during the further drying process.
  • Such another heating device can be designed, for example, as an induction heater for heating the drum 102 via induction or as a heating radiator or heater for providing a hot air flow.
  • a cold water blanket 118 is placed in the washer-dryer 100 prior to the drying process.
  • This water template 118 may the Do not touch the drum 104 so as not to rewet the laundry 102.
  • this is at drum contact level minus 10 mmWs.
  • This water mask 118 now serves as a further condensation surface.
  • the moist steam can condense in addition to the cold side 124 and the water mask 118 now.
  • the condensation of water vapor increases on the one hand the water level and at the same time the temperature. Now, either the temperature Tmax is reached at which there is only insufficient condensation of the water vapor, or the water level is so high that contact with the drum 104 will soon be reached, the water is drained and cold water for a new water feed 118 in let in the washer-dryer 100. This process takes place according to an embodiment so long until the reached drying stage is sensed. As a result, faster dryer programs and lower energy consumption can be realized.
  • FIG. 2 shows a washer-dryer 100 according to another embodiment.
  • the washer-dryer 100 is exemplified here as a washer-dryer 100 with heat pump.
  • the washer dryer 100 corresponds to the in FIG. 1 shown washer-dryer, with the difference that in the recirculation passage 120 next to the fan 122, a condenser 112 and an evaporator 124 of the heat pump are arranged.
  • the evaporator 124 acts as a condensing device.
  • the evaporator 124 is supplied to a refrigerant, which evaporates in the evaporator 124, thereby causing a cooling of the evaporator 124.
  • Air flowing through the condenser 112 is heated so that the condenser 112 acts as a heater for heating the air returned to the drum 104.
  • an additional heating device for heating the laundry 102 may be used during the further drying process, in which the water vapor escaping the laundry 102 condenses on the liquid receiver 118.
  • FIG. 3 is a flowchart of a method of drying laundry according to an embodiment.
  • the process may be carried out, for example, using a washer-dryer as described in US Pat FIG. 1 and 2 is shown.
  • the generated water vapor condenses on the cold surface.
  • This cold surface is realized in a heat pump dryer by an evaporator and the in FIG. 1
  • the washer-dryer shown by a water-cooled Kondenskanal.
  • the accumulated water is removed. This process is very time consuming and / or energetic.
  • the here described Process can be reduced both the time required for the drying process and the energy to be expended. It is thus a faster drying and saving energy allows.
  • a liquid reservoir is formed in the tub of the washer dryer.
  • a level of liquid template is set so that the drum of the washer dryer is outside the liquid template. In this way it is avoided that the laundry located in the drum is again soaked through the liquid template.
  • step 303 heat energy is introduced into the drum.
  • the introduction of the heat energy can be done using a suitable heater.
  • the heat energy heats the laundry and moisture in the laundry can evaporate and eventually settle on the liquid reservoir. By removing the moisture from the laundry, the laundry is dried.
  • Steps 301, 303 may be executed repeatedly.
  • the liquid original is first removed, for example, in a step 305 from the tub.
  • a new liquid receiver may be formed and used to condense further water vapor generated by repeating step 303 further heat energy is introduced to heat the laundry.
  • the drum is rotated in a step 307, so that the laundry located in the drum can be converted and the moisture can evaporate better.
  • the drum is optionally rotated at a high speed in a step 309 to spin the laundry.
  • the method comprises a step 311, in which a temperature prevailing inside the tub is detected.
  • a temperature of the liquid reservoir and additionally or alternatively a temperature of the drum can be detected.
  • Step 311 may be performed at different times during the process, or continuously or in parallel with one or more other steps of the process.
  • the one or more temperature values detected during step 311 become one embodiment used to control one or more steps of the process.
  • the current passage of the drying process may be terminated when the temperature within the tub reaches or exceeds a threshold.
  • the introduction 303 of the heat energy can be stopped and, in addition, the liquid reservoir can be removed from the tub.
  • drying process is then to be continued, for example because a predetermined number of passes of the drying process has not yet been reached, or if it is determined, for example using sensor data, that the laundry has not yet reached a desired degree of drying, then another passage of the drying process started by again introducing a liquid feed in a newly executed step 301.
  • the method comprises a step 313, in which the level of the liquid reservoir is detected.
  • a level representative value is used in accordance with one embodiment to decide whether step 305 is performed to remove or at least reduce the fluid reservoir. In this way, it can be prevented that the stock level of the liquid original increases so much that the drum could come into contact with the liquid template.
  • the level of the liquid original remains during the entire drying process, ie between the introduction 301 of the liquid template and the removal 305 of the liquid template always below a maximum level, which ensures that the drum does not come into contact with the liquid template. This can be ensured by selecting the level to be low enough initially, or by ensuring that the level is monitored continuously.
  • a step 315 air is discharged from the drum to a condensation device, which may be arranged, for example, in a circulating air channel of the washer-dryer. By using the condensation device further water vapor can be deposited.
  • the step 315 may be executed in parallel or offset in time to at least one of the steps 301, 303, 305, 307, 309, 311, 313.
  • FIG. 4 shows a control device 416 for controlling a drying process according to an embodiment.
  • the control device 416 is part of the in FIG. 1 shown control unit of a washer dryer.
  • the control device 416 is designed to control a pumping device 410, a heating device 412 and optionally a drive 414 of the washer-dryer such that, for example, that described with reference to FIG FIG. 3 described method for drying Laundry is performed.
  • the pumping device 410 comprises, for example, a device for the controlled supply of liquid into the tub, for example a valve, and a device for removing the liquid from the tub, for example a pump.
  • the heater 412 includes, for example, a coil for generating a magnetic field via which an induction current is generated in the drum to heat the drum. Additionally or alternatively, the heating device 412 comprises, for example, a heating wire for generating heat radiation or hot air, which can be supplied to the laundry.
  • the drive 414 is used according to an embodiment to rotate the drum. As a result, the laundry can be circulated or thrown.
  • control device 416 optionally has interfaces to a temperature detection device 414 and / or to a level detection device 415.
  • the temperature sensing device 414 is configured in accordance with various embodiments to detect a temperature of the liquid reservoir and, additionally or alternatively, a temperature of the drum or laundry or the air in the tub or drum.
  • the control device 416 has output interfaces, via which the control device 416 can provide a pump signal 420 to the pump device 410, a heat signal 422 to the heater 412 and optionally a drive signal 423 to the drive 413.
  • the control device 416 is designed to receive at least one temperature value 424 from the temperature detection device 414 and / or a liquid level fill level indicator 425 from the level detection device 415 and to use it to generate at least one of the control signals 420, 422, 423.
  • FIG. 5 is a flowchart of a control method for controlling a drying operation according to an embodiment.
  • the control method can, for example, from the basis of FIG. 4 be executed described control device.
  • a pump signal is output via an interface, which is designed to control a pump device of the heat dryer so that a liquid feed suitable for condensing water vapor is formed in the tub.
  • a heat signal is output via the or another interface, which is designed to control a heating device of the heat dryer such that laundry located in the drum heats up such that moisture in the laundry evaporates.
  • a further pump signal is output, which is designed to control the pump device of the heat dryer so that the liquid reservoir is removed from the tub. If the laundry has not yet been sufficiently dried, then steps 501, 503 can be carried out again.
  • a step 507 optionally at least one temperature value is read in, which represents a temperature of the liquid reservoir or the drum and additionally or alternatively read in a value which represents a fill level of the liquid reservoir within the tub.
  • at least one of the read-in values is compared with at least one threshold value. A result of the comparison is used, for example, to start step 505 or further steps of the method.
  • a result of a comparison between the temperature value and a threshold value is used to output another heat signal that terminates the introduction of the heat energy.
  • a drive signal is provided to a drive of the drum, by which the drum is set in motion so that the laundry located in the drum is transferred or thrown.
  • the driving signal for circulating the laundry may be provided while the laundry is heated by executing the step 503.
  • the drive signal for spinning the laundry may be provided, for example, during or before the liquid receiver is removed from the tub in step 505.
  • a step 511 air is passed out of the drum to a condensation device, at which the water vapor can condense additionally or alternatively to the condensation on the liquid reservoir.
  • FIG. 6 is a flowchart of a method of drying laundry according to an embodiment.
  • the method can be used, for example, by using one of FIGS. 1 or 2 shown washing dryers are executed.
  • a drying process in the washer-dryer is possible without operating a heat pump or a separate condenser for dehumidifying the laundry.
  • the method may thus be used alternatively or in addition to drying the laundry using a heat pump or a separate condenser.
  • a washer-dryer equipped with, for example, an additional induction heater, can perform a drying process for small amounts of charge exclusively using the liquid receiver as the condensation surface.
  • such a drying process carried out exclusively using the liquid original as a condensation surface is only carried out continuously if an inertia process has recognized a value of ⁇ 2 kg of laundry.
  • an optional check of the laundry weight takes place.
  • a water mask is placed in the tub in a step 301. This is below the level of the drum contact, so that the laundry is not moistened. This water mask serves as a condensation surface for the resulting water vapor during the drying process.
  • heat is transferred with the heating device switched on, for example induction switched on, and repetitive rotating rhythms.
  • the laundry is then circulated in a repetitive washing cycle 307 following the introduction of the water mask when the heating device 303 is switched on.
  • This rhythm is chosen such that the laundry falls freely in the drum and then touches the drum jacket heated by the induction in a short phase , This ensures that sufficient heat is provided for the evaporation.
  • This process is temperature monitored in step 634 to control the drying process. As long as the monitored temperature does not exceed a threshold, steps 303, 307 are repeated or continued. When the threshold is reached, steps 303, 307 are discontinued and, instead, thermal spin is performed in step 309.
  • a temperature monitoring by means of the induction coils takes place additionally or alternatively. There will be over there Temperature sensors directly measured the temperature of the drum. If the drum heats up too much or if it is no longer possible to put the power into the laundry, the process is also ended here.
  • thermal spin 309 is performed. By heating the laundry, the residual moisture can be additionally reduced. When spinning 309, the water mask is pumped out. So that the laundry does not come too long in contact with the heated drum is also turned off the induction heating.
  • step 636 it is checked whether the desired degree of drying has been reached. If this is not the case, steps 303, 307, 634, 309 are executed repeatedly. Otherwise, the drying process is ended. Additionally or alternatively, it is checked in step 636 whether a predetermined maximum number of repetitions of the steps 303, 307, 634, 309 has been reached. When the maximum repetitions have already been reached, the drying process is ended.
  • the timing of the completion of the drying process in step 636 is determined by the temperatures Tmax_Turning and Tmax_Tuning.
  • Tmax_turn is the maximum temperature that should not be exceeded in step 307 of the tumble
  • Tmax_turn is the maximum temperature that should not be exceeded in step 309 of the spin.
  • the process repetitions that is to say the repetitions of steps 303, 307, 634, 309, are also dependent on the selected program and the loading quantity according to one exemplary embodiment. Very small loads require fewer repetitions.
  • This drying process can also take place individually, ie without an upstream washing process.
  • a load measurement for example MTV method (inertia method) can be connected upstream. This ensures that only small loads are dried.
  • the laundry may be in the step 307, for example, be circulated in an optimized for this drying way. Furthermore, in this case it is possible to resort to a heating device already used for the drying in order to introduce the heat energy into the drum in step 303.
  • FIG. 7 shows a washer-dryer 100 according to an embodiment. This may be an embodiment of a reference to the FIGS. 1 or 2 act described washer dryer.
  • a dissipation of heat in the liquid receiver 118 is shown.
  • the liquid of the liquid receiver 118 is heated. If the liquid of the liquid receiver 118 is too warm, the liquid is pumped off and replaced with fresh water.
  • the laundry 102 is warm and the liquid receiver 118 is cold, so that the water vapor condenses on the liquid receiver 118.
  • FIG. 8 shows a washer-dryer 100 according to an embodiment. This may be an embodiment of the basis of FIG. 1 Wash washer described act. Based on FIG. 8 and the following ones FIG. 9 geometric boundary conditions are displayed.
  • the washer-dryer 100 has a further pump for circulating the wash liquor.
  • the liquid receiver 118 is formed by water in the tub 108 according to this embodiment. By way of example, an amount of 2.5 liters of water at a level with a water column of 26 mmWS is used. There is no drum contact between the drum and the water of the liquid receiver 118.
  • FIG. 8 a cut line 860 is shown.
  • a corresponding sectional view is in FIG. 9 shown.
  • FIG. 9 shows the in FIG. 8 called sectional view of in FIG. 9 illustrated washer dryer 100.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP18155788.5A 2017-02-21 2018-02-08 Procédé de séchage de linge, procédé de commande et dispositif de commande permettant de commander un processus de séchage et sèche-linge Withdrawn EP3375930A3 (fr)

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DE102017103500.1A DE102017103500A1 (de) 2017-02-21 2017-02-21 Verfahren zum Trocknen von Wäsche, Steuerverfahren und Steuervorrichtung zum Steuern eines Trocknungsvorgangs und Waschtrockner

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EP3666952A1 (fr) * 2018-12-10 2020-06-17 LG Electronics Inc. -1- Machine à laver disposant d'un élément de chauffage par induction et son procédé de commande
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US11598042B2 (en) 2019-03-28 2023-03-07 Whirlpool Corporation Laundry treating appliance with induction heat

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US11268234B2 (en) 2018-12-10 2022-03-08 Lg Electronics Inc. Laundry machine having induction heater and control method of the same
EP3666952A1 (fr) * 2018-12-10 2020-06-17 LG Electronics Inc. -1- Machine à laver disposant d'un élément de chauffage par induction et son procédé de commande
AU2019399394B2 (en) * 2018-12-13 2023-01-19 Lg Electronics Inc. Laundry machine having induction heater and control method of the same
CN113227483A (zh) * 2018-12-13 2021-08-06 Lg电子株式会社 具有感应加热器的洗衣机及其控制方法
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CN117127349B (zh) * 2018-12-13 2026-04-10 Lg电子株式会社 具有感应加热器的洗衣机及其控制方法
US11598042B2 (en) 2019-03-28 2023-03-07 Whirlpool Corporation Laundry treating appliance with induction heat
US12049721B2 (en) 2019-03-28 2024-07-30 Whirlpool Corporation Laundry treating appliance with induction heat
CN115298385A (zh) * 2020-03-20 2022-11-04 Lg电子株式会社 衣物处理装置
EP4123083A4 (fr) * 2020-03-20 2024-03-20 LG Electronics, Inc. Appareil de traitement de vêtements

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DE102017103500A1 (de) 2018-08-23

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