EP3091118A1 - Laveuse sécheuse et méthode pour opérer une laveuse sécheuse - Google Patents

Laveuse sécheuse et méthode pour opérer une laveuse sécheuse Download PDF

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Publication number
EP3091118A1
EP3091118A1 EP16020145.5A EP16020145A EP3091118A1 EP 3091118 A1 EP3091118 A1 EP 3091118A1 EP 16020145 A EP16020145 A EP 16020145A EP 3091118 A1 EP3091118 A1 EP 3091118A1
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EP
European Patent Office
Prior art keywords
process air
adsorption module
moisture
tub
laundry
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Withdrawn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
EP16020145.5A
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German (de)
English (en)
Inventor
Olaf Witte
Stefan Siepmann
Norbert Wieczorek
Michael Presto
Meltem Erdogan
Uwe Bau
Franz Lanzerath
André Bardow
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 EP3091118A1 publication Critical patent/EP3091118A1/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Withdrawn legal-status Critical Current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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the invention relates to a washer-dryer, that is to say a domestic appliance which is capable of both washing and drying laundry.
  • a washer-dryer that is to say a domestic appliance which is capable of both washing and drying laundry.
  • the washer dryer primarily saves space - it only needs to be purchased and set up a device.
  • a washer-dryer has a tub and a laundry drum rotatably arranged in the tub to hold laundry.
  • a heating element, a fan and a condenser are provided, which together with the tub provide a circuit which is traversed by a process air in a drying process.
  • Another drying concept provides that adsorbents are used for drying in household appliances.
  • An example of this shows EP 2 315 547 B1 , From which results in a dishwasher in which a zeolite-filled sorption is operated as a drying device.
  • An application of drying by means of adsorption in the area of the washer dryer is described in EP 2 439 329 B1 and in DE 10 2007 031 481 A1 disclosed.
  • the invention thus has the problem of providing a washer-dryer and a method for its operation in which an adsorption module is used efficiently to dry the laundry as quickly as possible.
  • the invention is based on the idea of operating an adsorption module and a condenser together with a heating element in the drying phase in such a way that the adsorption module is utilized as optimally as possible.
  • adsorption module the moisture of the directly exiting a condenser process air is almost 100%.
  • the adsorption module, the condenser and the heating element are now operated simultaneously in the drying phase.
  • the process air exiting the condenser is directed into the adsorption module without first passing through an active heating element. Due to the maximum humidity of the process air which is forced into the adsorption module, the adsorption module is optimally operated.
  • the washer-dryer has a control device which is designed to carry out the treatment method according to the invention.
  • the adsorption module may be an open adsorption system in direct communication with the atmosphere. Here, the adsorption and the desorption occur at ambient pressure. Alternatively, it may be a closed adsorption system, ie a system sealed from the ambient air. With a closed adsorption system, the working pressure can be freely selected.
  • a partially or already completely discharged adsorption module ie an adsorption module in which the adsorbent contained therein is essentially dry
  • moist process air is blown out of the tub into the adsorption module during the drying phase by the fan.
  • the moisture from the process air is adsorbed by the adsorbent.
  • the adsorption is an exothermic process, so that the heat energy released due to the adsorption process heats the process air.
  • the dry due to the flow through the adsorption hot process air is passed by means of the blower in the tub, where it absorbs moisture from there arranged in the laundry drum laundry and so dry the laundry.
  • the now again moist process air is then passed through the adsorption module again in the sense of a cycle in order to continue loading the adsorbent.
  • the drying process may continue to operate until the adsorbent is fully loaded, that is, until the adsorbent is unable to absorb additional moisture at a given process pressure. This is usually carried out at a loading of the adsorbent between 20% and 40%, depending on the adsorbent. If the laundry is then not sufficiently dry, drying the clothes by means of a conventional drying process can continue.
  • a capacitor can be used.
  • the use of a heat pump can be beneficial.
  • the adsorption module in the drying phase is operated simultaneously with the condenser and optionally with the heat pump.
  • This has the advantage that the drying process can run faster.
  • the majority of moisture is removed from the process air passing out of the tub by means of the condenser, and the adsorption module serves to remove the residual moisture from the process air which emerges from the condenser.
  • the process may be tuned so that the adsorbent in the adsorption module is fully loaded only at the end of the drying phase or even at the end of two consecutive drying phases.
  • the adsorption module can also be operated temporarily or at intervals in the drying phase.
  • a boost mode can be provided, in which the adsorption module is switched on after half or towards the end of a drying phase in order to accelerate the drying process abruptly.
  • a wash load of laundry after the washing phase is usually distributed over two drying processes. For example, following a wash at a standard load of 5.5 kg of laundry, usually two drying phases are performed at a load of about 2.75 kg each. This is the reason why it can be advantageous if the adsorption module is completely laden with moisture only after the second drying phase. The advantage is then that the adsorption module can be active during both drying phases in order to support the drying process.
  • a partially or already fully loaded adsorption module ie an adsorption module in which the adsorbent is loaded to saturation with adsorbed moisture
  • the moisture is removed from the adsorbent and in the tub in a subsequent washing phase in a desorption process directed.
  • the process air fed into the adsorption module must have a certain minimum temperature, namely an adsorption-dependent desorption temperature. This desorption temperature is much higher in conventional adsorbents than the temperature required for washing.
  • the moist process air emerging from the adsorption module is therefore always warmer than the laundry in the tub, so that the moisture condenses on the laundry. by virtue of condensation heat is released in this condensation process so that the laundry is heated at the same time and brought to the optimum washing temperature required for the selected washing process.
  • the washer-dryer in addition to the tub, the adsorption module and the blower on a capacitor and a heating element, which is arranged as a tub infeed heating element in a tub inlet line through which the process air reaches the tub.
  • a heating element which is arranged as a tub infeed heating element in a tub inlet line through which the process air reaches the tub.
  • the temperature difference between the moist process air flowing into the adsorption module and the drier process air flowing out of the adsorption module is also referred to as the temperature lift and is dependent on the adsorbent.
  • a liquor container inlet heating element is advantageous in order to lift the process air flowing into the tub to a temperature level at which efficient drying takes place.
  • the condenser, the liquor container inlet heating element and the blower are operated during the entire drying phase.
  • the laden with moisture from the laundry process air is passed through the condenser.
  • the condenser condenses moisture from the process air and the process air is cooled.
  • the cooled process is then passed from the condenser into the adsorption module.
  • There moisture from the process air is adsorbed on the adsorbent and the process air heated due to the released Adsorptionsenthalpie.
  • the exiting from adsorption process air is finally heated by means of the tub inlet heating element and then passed back into the tub.
  • Capacitor, the tub inlet heating element and / or the fan can be operated continuously or at intervals.
  • the process air is additionally dehumidified after passing through the condenser. This has the consequence that the process air flowing into the tub is even drier and therefore can absorb more moisture from the laundry. This speeds up the drying process.
  • the blower is arranged between the condenser and the adsorption module. This means that the process air passing out of the tub flows through the condenser and then through the fan to be subsequently directed into the adsorption module.
  • the adsorption module contains between 2kg and 7kg adsorbent, preferably between 2.5kg and 4.5kg or between 4.5kg and 6.5kg, more preferably between 3kg and 4kg or between 5kg and 6kg.
  • the adsorption module preferably contains between 3kg and 4kg zeolite, more preferably about 3.55kg, and when using silica gel preferably between 5kg and 6kg silica gel, more preferably about 5.85kg.
  • the adsorption module contains as adsorbent a silica gel, also called silica gel.
  • silica gel also called silica gel.
  • the silica gel 123 is advantageous here.
  • a salt is incorporated in order to increase the absorption capacity of moisture.
  • the silica gel salts are preferably included, for example, calcium chloride hexahydrate to obtain a so-called selective water sorbent (SWS) as an adsorbent.
  • SWS selective water sorbent
  • an adsorption module inlet heating element is provided which is arranged in an adsorption module supply line in order to heat the process air immediately before it enters the adsorption module.
  • an adsorption module heating element which is set up to bring the adsorption module to the desorption temperature necessary for the desorption process.
  • the adsorption module is optionally arranged together with the adsorption module inlet heating element between the fan and the tub or the tub inlet heating element, preferably so that the process air passing out of the tub flows through first the condenser, then the fan and then the adsorption module and finally returned to the tub.
  • existing washer-dryers can preferably also be retrofitted with an adsorption module.
  • FIG Fig. 1 The course of a conventional drying process in a washer-dryer according to the prior art will be described with reference to the schematic representation in FIG Fig. 1 explained.
  • a cycle process is illustrated by means of the broad arrows which schematically represent the flow of a process air 7 between main components of the washer dryer.
  • drier process air 7 flows into the tub 1 and removes moisture from the laundry.
  • the cooled and moist process air 7 due to this process flows to the condenser 3, where it continues to cool and the moisture partially condenses out.
  • the process air 7 is then passed to a heating element 5, which heats the process air 7. This reduces the relative humidity of the process air 7.
  • a blower 6 the warm dry process air 7 is again supplied to the tub 1.
  • the resulting cycle is maintained until the laundry in the tub 1 has reached the desired degree of dryness and the drying process is completed.
  • the condenser 3 may also be replaced by a heat pump system (not shown), which is a combination of an evaporator and a condenser. Then it is spoken by a heat pump condenser dryer or by a condensation dryer, which works on the principle of the heat pump. Also in all embodiments of the invention described above or below, instead of the condenser 3, such a heat pump system can be used.
  • the circuit comprises the tub 1, in which the washing drum 11 is rotatably mounted, the condenser 3, the fan 6 and an adsorption module 2, which is filled with an adsorbent.
  • the components within the dashed frame 71 are those in the conventional washer-dryer Fig. 1 already existing components.
  • a condenser feed line 43 leads to the condenser 3.
  • a liquor feed line 41 carries the process air to the tub 1 and an adsorption module supply line 42 to the adsorption tank 2.
  • lines 41, 42, 43 may be partially ducts, tubes or hoses , With the concept of However, conduit can also simply be an entity of any kind, which causes the process air 7 to be directed along a desired path to the respective component 1, 2, 3 of the washer-dryer.
  • a tub inlet heating element 51 and an adsorption module inlet heating element 52 are provided.
  • the suds container inlet heating element 51 serves to heat the process air 7 emerging from the adsorption module 2 before it flows into the suds container 1. This is necessary in a drying phase, when the temperature increase achieved due to the adsorbent used is not sufficient to dry the laundry efficiently. In the drying phase, therefore, the fan 6, the condenser 3, the adsorption module 2 and optionally the suds container inlet heating element 51 are active.
  • the initially moist process air 7 is passed through the condenser feed line 43 to the condenser 3, where it cools as in a conventional dryer.
  • the adsorption module 2 the residual moisture from the process air 7 is adsorbed on the adsorbent and the process air 7 undergoes a temperature elevation. If the temperature of the process air 7 after the temperature stroke is sufficient to effectively remove moisture from the laundry in the tub 1, the warm air which is now dry due to the adsorption process is passed through the liquor container supply line 51 into the tub 1 without being further heated. Otherwise, the process air 7 is heated by means of the liquor container inlet heating element 51 to the necessary temperature and enters the tub 1.
  • the dry laundry is usually removed by the user from the washing drum 11 and either immediately after, or but after some time, for example, after a few hours, days or even weeks a new load on laundry placed in the washing drum 11.
  • a washing phase is initiated.
  • the laundry is heated by means of a arranged below the tub heating element and brought to the desired or required washing temperature. In the present case, this instead takes place by means of the process air 7 emerging from the adsorption module 2.
  • the process air 7 was first heated to the required desorption temperature by means of the adsorption module inlet heating element 42. This is about 150 ° C for silica gel and about 300 ° C for zeolite.
  • the hot dry process air 7 then flows through the adsorption module 2 and absorbs the moisture stored in the adsorbent in a desorption process. As a result, the process air 7 is cooled slightly and at the same time moister.
  • the moist process air 7 from the adsorption module 2 is then passed through the tub container feed line 41 into the tub 1. There condenses the moisture from the process air to the laundry, on the walls of the tub 1 and the washing drum 11. Due to this condensation process condensation heat is released, which heats the laundry.
  • the desorption process ends when the adsorbent is completely dry, that is, when the adsorption module 2 is completely regenerated, or when the laundry has reached the desired wash temperature, so that the washing process can begin. If the adsorbent still contains moisture, the desorption process can be repeated within the wash phase to warm the wash.
  • the diagram in Fig. 3 shows four different temperature profiles.
  • the temperature is plotted along the y-axis. These are a temperature profile 101 of the process air 7 flowing into the adsorption module 2, a temperature profile 102 of the process air 7 flowing out of the adsorption module 2, a temperature profile 103 of the process air 7 flowing into the suds container 1 and finally a temperature curve 104 of the liquor container 1 flowing out of the suds container 1 Process air 7.
  • the adsorbent is silica gel.
  • the temperature rise of the process air 7 is rather low due to the adsorption process with silica gel and is about 20 ° C.
  • This temperature increase is shown in the diagram in the Fig. 3 in that the temperature 102 of the process air 7 at the outlet of the adsorption module 2 after a start-up time is continuously at about 20 ° C. above the temperature 101 at the inlet of the adsorption module 2.
  • the liquor container inlet heating element 51 is operated during the entire drying phase, so that the temperature 103 of the inflowing into the tub 1 process air 7 after the start-up time always above 120 ° C. lies. After the process air 7 has taken in the tub 1, the moisture from the laundry, their temperature drops, so that the temperature 104 of the process air 7 when leaving the Lye container 1 again below the temperature 104 at the output of the adsorption module 2 falls.
  • the first event mark 201 shows that the laundry only has a humidity of 50% after a process duration of slightly more than 30 minutes. After a slightly less than 40 minutes drying phase, according to the second event marking 202, the laundry is dry, so that the drying process is ended.
  • Humidity values are plotted in% along the y-axis.
  • a reference curve 301 of the moisture in the laundry for a drying process is applied, which is carried out exclusively with a condenser, ie without the addition of an adsorption module 2.
  • the curve 302 of the moisture is applied in the laundry in the case described above, at to which the adsorption module 2 is added over the entire drying phase.
  • the drying process is significantly faster, that is, the moisture in the laundry drops significantly faster from an initial value of over 40% to about 0%, as in the reference case without adsorption module 2. This is related to that the process air 7 due to the adsorption process in the adsorption module 2 when entering the tub 2 contains much less moisture and therefore the laundry can remove more moisture with each pass.
  • the diagram in the Fig. 5 shows curves 401, 402 of the power consumption for the condenser 3 and the tub inlet heating element 51. Along the y-axis, the power in kW is displayed here. The fact that the liquor container inlet heating element 51 is operated during the entire drying phase can be seen from the heating power 402 applied here, which is initially permanently at the highest level of 1.8 kW and, as soon as the temperature 103 of the process air 7 in front of the tub 1, the desired Drying temperature of 140 ° C has been lowered to a lower level of 0.9 kW.
  • the liquor container inlet heating element 51 is operated at intervals between 1.8 kW and 0.9 kW to maintain the temperature 103 of the process air 7 in a desired range between 130 ° C and 140 ° C.
  • the capacitor power 401 is also shown, which shows that the capacitor 3 is operated continuously during the entire drying phase.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP16020145.5A 2015-05-06 2016-04-19 Laveuse sécheuse et méthode pour opérer une laveuse sécheuse Withdrawn EP3091118A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015107036.7A DE102015107036A1 (de) 2015-05-06 2015-05-06 Waschtrockner und Verfahren zum Betreiben eines Waschtrockners

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EP3091118A1 true EP3091118A1 (fr) 2016-11-09

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002003002A1 (fr) * 2000-07-05 2002-01-10 Smart Clean Lave-linge et sechoir combines en circuit ferme
DE102007031481A1 (de) 2007-07-06 2009-01-08 BSH Bosch und Siemens Hausgeräte GmbH Waschtrockner
DE102008040770A1 (de) * 2008-07-28 2010-02-04 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben eines wasserführenden Haushaltsgerät
EP2439329B1 (fr) 2010-10-08 2013-03-06 Miele & Cie. KG Lave-sèche-linge doté d'une unité de séchage
DE102012221830A1 (de) * 2012-11-29 2014-06-05 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrockner und Verfahren zum Betreiben eines Wäschetrockners
DE102012223776A1 (de) * 2012-12-19 2014-06-26 BSH Bosch und Siemens Hausgeräte GmbH Sorptionsvorrichtung für ein Haushaltsgerät sowie entsprechendes Haushaltsgerät

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002003002A1 (fr) * 2000-07-05 2002-01-10 Smart Clean Lave-linge et sechoir combines en circuit ferme
DE102007031481A1 (de) 2007-07-06 2009-01-08 BSH Bosch und Siemens Hausgeräte GmbH Waschtrockner
DE102008040770A1 (de) * 2008-07-28 2010-02-04 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben eines wasserführenden Haushaltsgerät
EP2315547B1 (fr) 2008-07-28 2013-01-30 BSH Bosch und Siemens Hausgeräte GmbH Procédé de fonctionnement d'un appareil électro-ménager fonctionnant avec de l'eau
EP2439329B1 (fr) 2010-10-08 2013-03-06 Miele & Cie. KG Lave-sèche-linge doté d'une unité de séchage
DE102012221830A1 (de) * 2012-11-29 2014-06-05 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrockner und Verfahren zum Betreiben eines Wäschetrockners
DE102012223776A1 (de) * 2012-12-19 2014-06-26 BSH Bosch und Siemens Hausgeräte GmbH Sorptionsvorrichtung für ein Haushaltsgerät sowie entsprechendes Haushaltsgerät

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