EP2155949B1 - Domestic appliance for treating items of laundry, in particular washer dryer - Google Patents
Domestic appliance for treating items of laundry, in particular washer dryer Download PDFInfo
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- EP2155949B1 EP2155949B1 EP08759587A EP08759587A EP2155949B1 EP 2155949 B1 EP2155949 B1 EP 2155949B1 EP 08759587 A EP08759587 A EP 08759587A EP 08759587 A EP08759587 A EP 08759587A EP 2155949 B1 EP2155949 B1 EP 2155949B1
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- Prior art keywords
- domestic appliance
- appliance according
- constriction
- liquid
- turbulence
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/22—Lint collecting arrangements
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/24—Condensing arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
Definitions
- the invention relates to a domestic appliance for the care of laundry items, in particular a washer-dryer.
- From the EP 0 636 732 B1 is a set up for drying washing machine with a condenser, which condenser consists of a substantially bottom-to-top with moist process air flow through the hollow body and is flushed for cooling purposes via a switchable valve in the inlet with tap water.
- the inlet is dimensioned for a water flow which is suitable for flushing the hollow body and can be operated intermittently for supplying cooling water.
- the DE 195 22 307 C2 arranged for drying washing machine with a condenser, which consists of a substantially bottom-up with moist process air flowed through the hollow body and is rinsed with cooling water via a switchable valve in the guided at the upper portion of the hollow body inlet with tap water.
- the tap water runs as cooling water partly from the inner walls of the hollow body and is discharged via a lye drain system.
- the hollow body has in the inlet region of the process air to at least approximately horizontal spoiler edge, which is suitable to keep the run-down cooling water under the action of the counter-flowing process air by almost cylindrical swirling from unimpeded drainage.
- lint entrained in the process air stream can thereby also be washed out.
- Tumble dryers and also washer dryers tend to pollute the airways due to leaching during prolonged use without maintenance. This leaching can lead to the loss of function of the dryer.
- This dryer are known in which lint filters are used.
- dryers are also known in which water cooling is provided, it also being possible to filter lint by the cooling water.
- a domestic appliance for the care of laundry includes a dryer section, which is not water-cooled but air-cooled.
- This dryer part which can be cooled by cooling air, comprises a condenser which has a process air which essentially comprises from bottom to top with moist and lint and hollow body through which condensate liquid can flow from top to bottom.
- the condenser has a constriction narrowing the flow cross-section, which is designed to retain condensate liquid running down on inner walls of the hollow body under the effect of the countercurrent process air by approximately roller-shaped swirling of the condensate liquid, whereby the interaction between the swirling and the flowing Process air is formed a lint filter.
- the constriction is circumferential and annular.
- This symmetrical design ensures a particularly effective vortex formation of the condensate liquid and a local increase in the speed of the process air. Due to the annular configuration of the constriction, a particularly intensive contact of the process air with the condensate liquid can be achieved, thereby ensuring particularly effective lint filtering.
- the bottleneck is formed at an input of the capacitor.
- the cross-sectional reduction takes place directly at the entrance of the heat exchanger, where the process air is deflected on the one hand and distributed on the other hand from a round cross-section in the flat heat exchanger tubes. In this case, local flow areas with sufficient flow velocities in the process air virtually occur spontaneously.
- the constriction may preferably also be formed in the interior of the condenser, in particular in the hollow body.
- roller-shaped turbulence can be generated permanently during a drying process of the household appliance. This means that a permanent lint filtering is given and the turbulence does not build up alternately and then collapse again.
- the countercurrent flows of the condensate liquid and the process air are preferably designed such that equilibrium is established between the condensate liquid flowing from above into the cylindrical turbulence and the condensate liquid flowing down from the cylindrical turbulence.
- the turbulence thus takes place permanently largely by itself. By establishing a pressure difference across the water vortex, this equilibrium can be generated and maintained.
- the height of the roller-shaped turbulence is preferably about 10 mm, which is generated by the pressure difference across the water vortex. This height ensures effective lint filtering.
- the cylindrical turbulence has in the equilibrium state between inflow and outflow of condensate liquid amount of between 25 ml and 100 ml, in particular about 50 ml.
- the amount enclosed in the water vortex should neither be too high nor too low. If the amount is too high, the flow resistance of the hollow body is increased too much and the heat exchanger surface is reduced too much. If the height is too low, the effectiveness of lint filtering will also decrease.
- the resulting compromise is based on a completely different basis than the one who in the DE 195 22 307 C2 is to produce the optimization of the interaction between the cooling water and the process air.
- the constriction preferably has an inner diameter which is between 80% and 95%, in particular about 90%, of the inner diameter which the process air guide, in particular the condenser of the domestic appliance has adjacent to this constriction.
- a liquid collecting device is preferably arranged upstream of the condenser in which liquid can be collected from a preceding laundry care process and which can be introduced into the condenser to form the vortex at the beginning of a subsequent laundry care process.
- the liquid collection device may be a bag, which in particular has at least one fold of an existing bellows.
- the water obtained from a preceding washing or drying process, in particular during a rinsing or spinning process can be stored here and entered into the heat exchanger or condenser at the start of the subsequent drying process, in particular when the process air stream is put into operation. As a result, the sufficient and required turbulence for lint filtering can be generated right from the start.
- the course of the circulated in the turbulence condensate is dependent on an actively controlled reduction of the counterforce generated by the process air flow.
- This can be done by changing the flow velocity of the process air and / or the air mass flowing in the process air.
- the fan which generates the process air flow, switched slower running or partially completely disabled.
- the process air flow can thus be reduced not only in its flow velocity and / or its air mass, but also completely deactivated.
- rinsing liquid can be fed into the interior of the hollow body.
- an external water connection can be provided, via which the rinsing liquid can be conducted into the hollow body.
- the rinsing liquid may also be the liquid contained in the liquid collecting device.
- rinsing liquid can be supplied at the beginning of a drying process and / or at the end of a drying process.
- the amount of condensate liquid may not be sufficient, in particular at the start of drying or at the end of drying, in order to be able to generate a fluid vortex in the region of the constriction.
- the supply of rinsing fluid vortex formation By possibly at specific times of the drying process for relatively short periods compared to the duration of a drying process and moreover in very defined and metered amounts of rinsing liquid can be supplied, the supplied required amount of liquid can still be minimized. Also, this freedom of maintenance is not affected.
- the amount of rinsing liquid to be supplied can be supplied additionally or instead as a function of a specific phase of the drying process as a function of a condensate liquid currently present. This can be monitored for example by a suitable sensor.
- a sensor for monitoring the vortex formation of the liquid is arranged in the region of the constriction, which sensor is connected to a control unit for controlling the rinsing liquid addition.
- the sensor may be a temperature sensor or a moisture sensor. It is preferred if this sensor is arranged on the outside of the hollow body in the region of the constriction.
- the flushing fluid which can be supplied externally via a water connection can also be used to clean the condenser and the entire airways after each drying and also after each wash cycle.
- the hollow body is formed so that it has on both sides of the constriction an inner diameter which is greater than the inner diameter of the constriction.
- the household appliance is designed as a washer-dryer.
- the schematic figure shows an air-cooled and thus not water-cooled dryer part 1 of a washer dryer.
- the dryer part 1 comprises a condenser 2 with a hollow body 2 which is concretely a heat exchanger tube 2 of a plurality of such heat exchanger tubes 2 in the condenser 2.
- a condensate liquid 22 accumulating during the drying process flows from top to bottom on an inner side 21 in the hollow body 2.
- a process air P whose flow direction is defined by a blower, not shown, which is coupled to the hollow body 2.
- cooling air K passes the hollow body 2 to remove heat from the process air P and to cause entrained water vapor to condense. Since the inner side 21 is the coolest point in the hollow body 2, this condensation takes place there in the first place.
- Means for driving and guiding the cooling air K along the hollow body 2 including a fan and a duct system, as known per se, not shown here.
- the process air P flows from a supply air opening 26, which simultaneously represents the drainage opening for the condensate liquid 22, via a constriction 24 of the hollow body 2 to a fan connection opening 27.
- the constriction 24 is arranged inside the condenser. It can preferably also be provided that the constriction 24 in the flow direction of the process air P at the supply air opening 26 of the capacitor, in particular at the entrance of the hollow body 2, is formed.
- the constriction 24 is formed so that it reduces the flow cross-section in the hollow body 2.
- the inner diameter of the hollow body 2 are larger than the inner diameter d at this constriction 24, where it is important that, considered in the direction of the process air P, the inner diameter of the hollow body 2 expands beyond the constriction 24.
- the constriction 24 is formed circumferentially, and the turbulence 23 is also substantially an annular structure.
- a sensor 3 is arranged in the region of the constriction 24. This may be a temperature sensor 3 or a humidity sensor 3, which is electrically connected to a control unit 4.
- the control unit 4 is further connected to a valve 5, which is arranged in a supply channel 6. Via the supply channel 6, external rinsing liquid can be conducted into the interior of the hollow body 2.
- the rinsing liquid can originate from a liquid collecting device 7, which is preferably arranged in the process air guide of the washer-dryer in the flow direction of the process air P in front of the condenser to be flowed through.
- the downflowing condensate liquid 22 impinges on the constriction 24 to the process air P accelerated there, whereby parts of the condensate liquid 22 are torn up and swirled above the constriction 24 to form a kind of annular roller. This accumulates more and more condensate liquid 22 until the weight force generated by the mass of the circulated condensate liquid 22 is greater than the counterforce generated by the flow of process air P.
- the then running over the bottleneck water or the condensate liquid 22 is then passed in a lye drain system, not shown, up to a tub.
- the opposing force generated by the process air flow P is changed defined. It can be provided in particular that the fan is made weaker, whereby the process air flow P is changed.
- the turbulence 23 is substantially permanently formed during the drying process, and a balance is established between the condensate liquid 22 running from above into the turbulence 23 and flowing downwards from the turbulence. In the turbulence is about an amount of 50 ml of condensate liquid 22 included.
- This refinement of the domestic appliance makes it possible to provide an air-cooled dryer part, in which the lint filtering is made possible without maintenance and, moreover, considerable water savings can be made possible.
- the lint filtering can generally be made possible solely by the condensate liquid and, if necessary, at best requires a small additional amount of rinsing liquid.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
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- General Engineering & Computer Science (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
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Abstract
Description
Die Erfindung betrifft ein Hausgerät zur Pflege von Wäschestücken, insbesondere einen Waschtrockner.The invention relates to a domestic appliance for the care of laundry items, in particular a washer-dryer.
Aus der
Des Weiteren ist aus der
Wäschetrockner und auch Waschtrockner neigen bei längerer Benutzung ohne Wartung zur Verschmutzung der Luftwege durch Verflusung. Diese Verflusung kann bis zum Funktionsverlust des Trockners führen. Dabei sind Trockner bekannt, bei denen Flusensiebe eingesetzt werden. Wie bereits aus dem vorab genannten Stand der Technik erläutert wurde, sind auch Trockner bekannt, bei denen eine Wasserkühlung vorgesehen ist, wobei durch das Kühlwasser auch Flusen gefiltert werden können.Tumble dryers and also washer dryers tend to pollute the airways due to leaching during prolonged use without maintenance. This leaching can lead to the loss of function of the dryer. This dryer are known in which lint filters are used. As has already been explained in the aforementioned prior art, dryers are also known in which water cooling is provided, it also being possible to filter lint by the cooling water.
Bei den bekannten Trocknern wird jedoch eine große Menge an Wasser benötigt und es ist ein erheblicher Wartungsaufwand erforderlich.In the known dryers, however, a large amount of water is needed and it is a considerable maintenance required.
Es ist Aufgabe der vorliegenden Erfindung, ein Hausgerät zur Pflege von Wäschestücken zu schaffen, bei welchem die Flusenfilterung mit einem reduzierten Wasserbedarf erfolgen und die Wartungsintensität reduziert werden kann.It is an object of the present invention to provide a domestic appliance for the care of items of laundry, in which the lint filtering with a reduced water requirement and the maintenance intensity can be reduced.
Diese Aufgabe wird durch ein Hausgerät zur Pflege von Wäschestücken, welches die Merkmale nach Anspruch 1 aufweist, gelöst.This object is achieved by a household appliance for the care of laundry items, which has the features of claim 1.
Ein Hausgerät zur Pflege von Wäschestücken umfasst ein Trocknerteil, welches nicht wassergekühlt sondern luftgekühlt ist. Dieses entsprechend durch Kühlluft kühlbare Trocknerteil umfasst einen Kondensator, der einen im Wesentlichen von unten nach oben mit feuchter und Flusen umfassender Prozessluft und von oben nach unten mit Kondensatflüssigkeit durchströmbaren Hohlkörper aufweist. Der Kondensator weist eine den Strömungsquerschnitt verkleinernde Engstelle auf, welche so ausgebildet ist, an Innenwänden des Hohlkörpers herablaufende Kondensatflüssigkeit unter der Wirkung der gegenströmenden Prozessluft durch annähernd walzenförmige Verwirbelung der Kondensatflüssigkeit vor dem ungehinderten Ablauf zu bewahren, wobei mittels der Wechselwirkung zwischen der Verwirbelung und der strömenden Prozessluft eine Flusenfilterung ausgebildet ist. Durch ein derartig ausgestaltetes Hausgerät kann ein effektives Ausfiltern von Flusen in dem Prozessluftstrom erreicht und der Wartungsaufwand erheblich reduziert werden, insbesondere sogar vollständig vermieden werden. Darüber hinaus kann die erforderliche Flüssigkeitsmenge zum Auswaschen von Flusen wesentlich reduziert werden.A domestic appliance for the care of laundry includes a dryer section, which is not water-cooled but air-cooled. This dryer part, which can be cooled by cooling air, comprises a condenser which has a process air which essentially comprises from bottom to top with moist and lint and hollow body through which condensate liquid can flow from top to bottom. The condenser has a constriction narrowing the flow cross-section, which is designed to retain condensate liquid running down on inner walls of the hollow body under the effect of the countercurrent process air by approximately roller-shaped swirling of the condensate liquid, whereby the interaction between the swirling and the flowing Process air is formed a lint filter. By means of such a configured household appliance, an effective filtering out of lint in the process air stream can be achieved and the maintenance effort can be considerably reduced, in particular even completely avoided. In addition, the amount of liquid required to wash out lint can be substantially reduced.
Vorzugsweise ist die Engstelle umlaufend und ringförmig ausgebildet. Diese symmetrische Ausgestaltung gewährleistet eine besonders effektive Wirbelbildung der Kondensatflüssigkeit und eine örtliche Erhöhung der Geschwindigkeit der Prozessluft. Durch die ringförmige Ausgestaltung der Engstelle kann ein besonders intensiver Kontakt der Prozessluft mit der Kondensatflüssigkeit erreicht und dadurch eine besonders effektive Flusenfilterung gewährleistet werden.Preferably, the constriction is circumferential and annular. This symmetrical design ensures a particularly effective vortex formation of the condensate liquid and a local increase in the speed of the process air. Due to the annular configuration of the constriction, a particularly intensive contact of the process air with the condensate liquid can be achieved, thereby ensuring particularly effective lint filtering.
Vorzugsweise ist die Engstelle an einem Eingang des Kondensators ausgebildet. Dadurch ist es nicht erforderlich, im Inneren des Kondensators eine Engstelle auszubilden. Die Querschnittsverringerung erfolgt direkt am Eingang des Wärmetauschers, wo die Prozessluft einerseits umgelenkt und andererseits aus einem runden Querschnitt in die flachen Wärmetauscherrohre verteilt wird. Dabei treten dann quasi ganz von selbst lokale Strömungsbereiche mit ausreichenden Strömungsgeschwindigkeiten in der Prozessluft auf.Preferably, the bottleneck is formed at an input of the capacitor. As a result, it is not necessary to form a constriction inside the condenser. The cross-sectional reduction takes place directly at the entrance of the heat exchanger, where the process air is deflected on the one hand and distributed on the other hand from a round cross-section in the flat heat exchanger tubes. In this case, local flow areas with sufficient flow velocities in the process air virtually occur spontaneously.
Die Engstelle kann vorzugsweise auch im Inneren des Kondensators, insbesondere im Hohlkörper, ausgebildet sein.The constriction may preferably also be formed in the interior of the condenser, in particular in the hollow body.
Die walzenförmige Verwirbelung ist während eines Trocknungsprozesses des Hausgeräts dauerhaft erzeugbar. Dies bedeutet, dass eine permanente Flusenfilterung gegeben ist und die Verwirbelung nicht alternierend sich aufbaut und dann wieder zusammenbricht.The roller-shaped turbulence can be generated permanently during a drying process of the household appliance. This means that a permanent lint filtering is given and the turbulence does not build up alternately and then collapse again.
Die entgegenlaufenden Strömungen der Kondensatflüssigkeit und der Prozessluft sind vorzugsweise so ausgebildet, dass sich ein Gleichgewicht zwischen der von oben in die walzenförmige Verwirbelung zuströmenden Kondensatflüssigkeit und der aus der walzenförmigen Verwirbelung nach unten abfließenden Kondensatflüssigkeit einstellt. Die Verwirbelung erfolgt somit dauerhaft weitgehend von selbst. Durch eine sich über dem Wasserwirbel einstellenden Druckdifferenz kann dieses Gleichgewicht erzeugt und aufrechterhalten werden.The countercurrent flows of the condensate liquid and the process air are preferably designed such that equilibrium is established between the condensate liquid flowing from above into the cylindrical turbulence and the condensate liquid flowing down from the cylindrical turbulence. The turbulence thus takes place permanently largely by itself. By establishing a pressure difference across the water vortex, this equilibrium can be generated and maintained.
Die Höhe der walzenförmigen Verwirbelung beträgt vorzugsweise etwa 10 mm, welche durch die Druckdifferenz über dem Wasserwirbel erzeugt wird. Durch diese Höhe kann eine effektive Flusenfilterung gewährleistet werden.The height of the roller-shaped turbulence is preferably about 10 mm, which is generated by the pressure difference across the water vortex. This height ensures effective lint filtering.
Die walzenförmige Verwirbelung weist im Gleichgewichtszustand zwischen Zuströmung und Abströmung von Kondensatflüssigkeit eine Flüssigkeitsmenge zwischen 25 ml und 100 ml, insbesondere etwa 50 ml, auf. Die im Wasserwirbel eingeschlossene Menge soll weder zu hoch noch zu niedrig sein. Bei einer zu hohen Menge werden der Durchflusswiderstand des Hohlkörpers zu sehr erhöht und die Wärmetauscherfläche zu sehr verringert. Bei einer zu niedrigen Höhe nimmt auch die Effektivität der Flusenfilterung ab. Der dabei herzustellende Kompromiss beruht auf einer völlig anderen Grundlage als derjenige, welcher in der
Die Engstelle weist vorzugsweise einen Innendurchmesser auf, der zwischen 80% und 95%, insbesondere etwa 90%, des Innendurchmessers beträgt, den die Prozessluftführung, insbesondere der Kondensator des Hausgeräts benachbart zu dieser Engstelle aufweist. Dadurch können die Strömungsgeschwindigkeiten und die Wirbelbildung optimal eingestellt werden.The constriction preferably has an inner diameter which is between 80% and 95%, in particular about 90%, of the inner diameter which the process air guide, in particular the condenser of the domestic appliance has adjacent to this constriction. As a result, the flow rates and vortex formation can be optimally adjusted.
In der Prozessluftführung des Hausgeräts ist vorzugsweise in Strömungsrichtung vor dem Kondensator eine Flüssigkeitssammeleinrichtung angeordnet, in welcher Flüssigkeit von einem vorhergehenden Wäschepflegeprozess sammelbar ist und welches zu Beginn eines nachfolgenden Wäschepflegeprozesses in den Kondensator zur Bildung der Verwirbelung einleitbar ist. Die Flüssigkeitssammeleinrichtung kann eine Tasche sein, die insbesondere zumindest eine Falte eines vorhandenen Faltenbalgs aufweist. Das aus einem vorhergehenden Wasch- oder Trocknungsprozess, insbesondere bei einem Spül- oder Schleudervorgang, angefallene Wasser kann hier gespeichert werden und beim Starten des nachfolgenden Trocknungsprozesses, insbesondere bei Inbetriebnahme des Prozessluftstroms, in den Wärmetauscher bzw. Kondensator eingetragen werden. Dadurch kann von Anfang an die ausreichende und erforderliche Verwirbelung zur Flusenfilterung erzeugt werden.In the process air guide of the domestic appliance, a liquid collecting device is preferably arranged upstream of the condenser in which liquid can be collected from a preceding laundry care process and which can be introduced into the condenser to form the vortex at the beginning of a subsequent laundry care process. The liquid collection device may be a bag, which in particular has at least one fold of an existing bellows. The water obtained from a preceding washing or drying process, in particular during a rinsing or spinning process, can be stored here and entered into the heat exchanger or condenser at the start of the subsequent drying process, in particular when the process air stream is put into operation. As a result, the sufficient and required turbulence for lint filtering can be generated right from the start.
Besonders bevorzugt ist es, wenn der Ablauf der in der Verwirbelung umgewälzten Kondensatflüssigkeit abhängig von einer aktiv gesteuerten Reduzierung der von dem Prozessluftstrom erzeugten Gegenkraft ist. Dies kann dadurch erfolgen, dass die Strömungsgeschwindigkeit der Prozessluft und/oder die in der Prozessluft strömende Luftmasse verändert werden. Beispielsweise kann dazu das Gebläse, welches den Prozessluftstrom erzeugt, langsamer laufend geschaltet oder teilweise vollständig deaktiviert werden. Der Prozessluftstrom kann somit nicht nur in seiner Strömungsgeschwindigkeit und/oder seiner Luftmasse verringert, sondern auch vollständig deaktiviert werden. Durch eine derartige getaktete Ausbildung des Prozessluftstroms kann auch sehr schnell und bedarfsabhängig der Ablauf der umgewälzten Kondensatflüssigkeit erreicht werden.It is particularly preferred if the course of the circulated in the turbulence condensate is dependent on an actively controlled reduction of the counterforce generated by the process air flow. This can be done by changing the flow velocity of the process air and / or the air mass flowing in the process air. For example, for this purpose, the fan, which generates the process air flow, switched slower running or partially completely disabled. The process air flow can thus be reduced not only in its flow velocity and / or its air mass, but also completely deactivated. By such a clocked training of the process air flow can be achieved very quickly and demand-dependent the flow of the circulated condensate liquid.
Es kann vorgesehen sein, dass in das Innere des Hohlkörpers Spülflüssigkeit zuführbar ist. Dazu kann ein externer Wasseranschluss vorgesehen sein, über den die Spülflüssigkeit in den Hohlkörper geleitet werden kann. Die Spülflüssigkeit kann auch die in der Flüssigkeitssammeleinrichtung enthaltene Flüssigkeit sein.It can be provided that rinsing liquid can be fed into the interior of the hollow body. For this purpose, an external water connection can be provided, via which the rinsing liquid can be conducted into the hollow body. The rinsing liquid may also be the liquid contained in the liquid collecting device.
Vorzugsweise ist Spülflüssigkeit zu Beginn eines Trocknungsprozesses und/oder am Ende eines Trocknungsprozesses zuführbar. Bei dem luftgekühlten Trocknungsteil, bei dem keine Flüssigkeitskühlung vorgesehen ist, kann insbesondere am Trocknungsanfang oder am Trocknungsende die Menge der Kondensatflüssigkeit noch nicht ausreichend sein, um einen Flüssigkeitswirbel im Bereich der Engstelle generieren zu können. Gerade während dieser Phasen des Trocknungsprozesses kann dann vorteilhafterweise durch die Zuführung von Spülflüssigkeit diese Wirbelbildung unterstützt werden. Indem allenfalls zu spezifischen Zeitpunkten des Trocknungsprozesses für relativ kurze Zeitdauern im Vergleich zur Dauer eines Trocknungsprozesses und darüber hinaus in sehr definierten und dosierten Mengen Spülflüssigkeit zuführbar ist, kann die zugeführte erforderliche Flüssigkeitsmenge immer noch minimal gehalten werden. Auch ist dadurch die Wartungsfreiheit nicht beeinträchtigt.Preferably, rinsing liquid can be supplied at the beginning of a drying process and / or at the end of a drying process. In the case of the air-cooled drying part, in which liquid cooling is not provided, the amount of condensate liquid may not be sufficient, in particular at the start of drying or at the end of drying, in order to be able to generate a fluid vortex in the region of the constriction. Especially during these phases of the drying process can be advantageously supported by the supply of rinsing fluid vortex formation. By possibly at specific times of the drying process for relatively short periods compared to the duration of a drying process and moreover in very defined and metered amounts of rinsing liquid can be supplied, the supplied required amount of liquid can still be minimized. Also, this freedom of maintenance is not affected.
Insbesondere kann vorgesehen sein, dass die zuzuführende Menge der Spülflüssigkeit zusätzlich oder anstatt in Abhängigkeit von einer spezifischen Phase des Trocknungsprozesses abhängig von einer momentan vorhandenen Kondensatflüssigkeit zuführbar ist. Dies kann beispielsweise durch eine geeignete Sensorik überwacht sein.In particular, it can be provided that the amount of rinsing liquid to be supplied can be supplied additionally or instead as a function of a specific phase of the drying process as a function of a condensate liquid currently present. This can be monitored for example by a suitable sensor.
Vorzugsweise ist im Bereich der Engstelle ein Sensor zur Überwachung der Wirbelbildung der Flüssigkeit angeordnet, welcher Sensor mit einer Steuereinheit zur Steuerung der Spülflüssigkeitszugabe verbunden ist. Insbesondere kann der Sensor ein Temperatursensor oder ein Feuchtigkeitssensor sein. Bevorzugt ist es, wenn dieser Sensor an der Außenseite des Hohlkörpers im Bereich der Engstelle angeordnet ist. Die extern über einen Wasseranschluss zuführbare Spülflüssigkeit kann auch zur Reinigung des Kondensators und der gesamten Luftwege nach jeder Trocknung und auch nach jedem Waschgang verwendet werden.Preferably, a sensor for monitoring the vortex formation of the liquid is arranged in the region of the constriction, which sensor is connected to a control unit for controlling the rinsing liquid addition. In particular, the sensor may be a temperature sensor or a moisture sensor. It is preferred if this sensor is arranged on the outside of the hollow body in the region of the constriction. The flushing fluid which can be supplied externally via a water connection can also be used to clean the condenser and the entire airways after each drying and also after each wash cycle.
Vorzugsweise ist der Hohlkörper so ausgebildet, dass er beidseits der Engstelle einen Innendurchmesser aufweist, welcher größer ist als der Innendurchmesser der Engstelle.Preferably, the hollow body is formed so that it has on both sides of the constriction an inner diameter which is greater than the inner diameter of the constriction.
Durch diese Dimensionierung kann in optimaler Weise die Strömung der Prozessluft einerseits und die Wirbelbildung der Kondensatflüssigkeit andererseits erzeugt werden.By this dimensioning, the flow of the process air on the one hand and the vortex formation of the condensate liquid on the other hand can be generated in an optimal manner.
Insbesondere ist das Hausgerät als Waschtrockner ausgebildet.In particular, the household appliance is designed as a washer-dryer.
Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand einer schematischen Zeichnung näher erläutert. Die einzige Figur zeigt eine schematische Schnittdarstellung eines Teilbereichs eines Trocknungsteils des erfindungsgemäßen Hausgeräts. Form und Anordnung der Komponenten sind lediglich beispielhaft und können auch anderweitig vorgesehen sein.An embodiment of the invention will be explained in more detail with reference to a schematic drawing. The single figure shows a schematic sectional view of a portion of a drying part of the domestic appliance according to the invention. Form and arrangement of the components are merely exemplary and may be otherwise provided.
Die schematische Figur zeigt ein luftgekühltes und somit nicht wassergekühltes Trocknerteil 1 eines Waschtrockners. Das Trocknerteil 1 umfasst einen Kondensator 2 mit einem Hohlkörper 2, welcher konkret ein Wärmetauscherrohr 2 von einer Mehrzahl solcher Wärmetauscherrohre 2 im Kondensator 2 ist. In dem Hohlkörper 2 strömt eine während des Trocknungsprozesses anfallende Kondensatflüssigkeit 22 an einer Innenseite 21 in dem Hohlkörper 2 von oben nach unten. In einer der Strömungsrichtung der Kondensatflüssigkeit 22 entgegengesetzten Richtung und somit von unten nach oben strömt eine Prozessluft P, deren Strömungsrichtung durch ein nicht dargestelltes Gebläse, welches mit dem Hohlkörper 2 gekoppelt ist, definiert wird. Außenseitig streicht Kühlluft K an dem Hohlkörper 2 vorbei, um der Prozessluft P Wärme zu entziehen und mitgeführten Wasserdampf zur Kondensation zu bringen. Da die Innenseite 21 die kühlste Stelle im Hohlkörper 2 ist, erfolgt diese Kondensation in erster Linie dort. Mittel zum Antreiben und zum Führen der Kühlluft K entlang des Hohlkörpers 2 einschließlich eines Gebläses und eines Kanalsystems sind, da an sich bekannt, vorliegend nicht dargestellt.The schematic figure shows an air-cooled and thus not water-cooled dryer part 1 of a washer dryer. The dryer part 1 comprises a condenser 2 with a hollow body 2 which is concretely a heat exchanger tube 2 of a plurality of such heat exchanger tubes 2 in the condenser 2. In the hollow body 2, a
Die Prozessluft P strömt von einer Zuluftöffnung 26, welche gleichzeitig die Abflussöffnung für die Kondensatflüssigkeit 22 darstellt, über eine Engstelle 24 des Hohlkörpers 2 bis zu einer Gebläse-Anschlussöffnung 27. Bei der gezeigten Ausführung ist die Engstelle 24 innerhalb des Kondensators angeordnet. Es kann vorzugsweise auch vorgesehen sein, dass die Engstelle 24 in Strömungsrichtung der Prozessluft P an der Zuluftöffnung 26 des Kondensators, insbesondere am Eingang des Hohlkörpers 2, ausgebildet ist.The process air P flows from a
Die Engstelle 24 ist so ausgebildet, dass sie den Strömungsquerschnitt im Hohlkörper 2 verkleinert. Beidseits der Engstelle 24 sind die Innendurchmesser des Hohlkörpers 2 größer als der Innendurchmesser d an dieser Engstelle 24, wobei es vor allem darauf ankommt, dass, in Richtung der Prozessluft P betrachtet, der Innendurchmesser des Hohlkörpers 2 hinter der Engstelle 24 erweitert. Durch die Engstelle 24 wird eine lokale Umwälzung des herabströmenden Kondensats bzw. der Kondensatflüssigkeit 22 und somit ein Wirbel bzw. eine Verwirbelung 23 erzeugt. Die Engstelle 24 ist umlaufend ausgebildet, und die Verwirbelung 23 ist ebenfalls im Wesentlichen eine ringförmige Struktur.The
An einer Außenseite 25 des Hohlkörpers 2 ist im Bereich der Engstelle 24 ein Sensor 3 angeordnet. Dies kann ein Temperatursensor 3 oder ein Feuchtesensor 3 sein, welcher mit einer Steuereinheit 4 elektrisch verbunden ist. Die Steuereinheit 4 ist des Weiteren mit einem Ventil 5 verbunden, welches in einem Zufuhrkanal 6 angeordnet ist. Über den Zufuhrkanal 6 kann externe Spülflüssigkeit in das Innere des Hohlkörpers 2 geführt werden. Die Spülflüssigkeit kann von einer Flüssigkeitssammeleinrichtung 7 stammen, welche vorzugsweise in der Prozessluftführung des Waschtrockners in Strömungsrichtung der Prozessluft P vor dem zu durchströmenden Kondensator angeordnet ist.On an
Die herabströmende Kondensatflüssigkeit 22 trifft an der Engstelle 24 auf die dort beschleunigte Prozessluft P, wodurch Teile der Kondensatflüssigkeit 22 hochgerissen und verwirbelt oberhalb der Engstelle 24 zu einer Art ringförmigen Walze ausgebildet werden. Diese sammelt immer mehr Kondensatflüssigkeit 22 an, bis die durch die Masse der umgewälzten Kondensatflüssigkeit 22 erzeugte Gewichtskraft größer ist als die durch den Strom der Prozessluft P erzeugte Gegenkraft. Das dann über die Engstelle ablaufende Wasser bzw. die Kondensatflüssigkeit 22 wird dann in einem nicht dargestellten Laugenablauf-System bis zu einem Laugenbehälter geleitet.The
Insbesondere ist jedoch vorgesehen, dass zum definierten Erzeugen des Ablaufs der umgewälzten Kondensatflüssigkeit 22 oberhalb der Engstelle 24 die durch den Prozessluftstrom P erzeugte Gegenkraft definiert verändert wird. Dabei kann insbesondere vorgesehen sein, dass das Gebläse schwächer gestellt wird, wodurch auch der Prozessluftstrom P verändert wird.In particular, however, it is provided that for the defined generation of the flow of the circulated
Die Verwirbelung 23 ist während des Trocknungsprozesses im Wesentlichen dauerhaft ausgebildet und es stellt sich ein Gleichgewicht zwischen der von oben in die Verwirbelung 23 hineinlaufenden und aus der Verwirbelung nach unten ablaufenden Kondensatflüssigkeit 22 ein. In der Verwirbelung ist etwa eine Menge von 50 ml von Kondensatflüssigkeit 22 enthalten.The
Während des Trocknungsprozesses wird externe Spülflüssigkeit über den Zufuhrkanal 6 nur dann in definierten Mengen zugeleitet, wenn über den Sensor 3 keine oder eine nicht ausreichende Wirbelbildung bzw. Verwirbelung 23 detektiert ist. Abhängig von dem Signal des Sensors 3 wird dann über die Steuereinheit 4 das Ventil 5 entsprechend angesteuert. Insbesondere ist bei einem luftgekühlten Trocknerteil 1 die Phase des Beginns des Trocknungsprozesses und des Endes des Trocknungsprozesses im Hinblick auf die Bildung von Verwirbelung 23 allein durch die Kondensatflüssigkeit 22 kritisch. Insbesondere in diesen Phasen des Trocknungsprozesses kann dann vorgesehen sein, zeitlich und/oder mengenmäßig definiert Spülflüssigkeit zuzuführen.During the drying process, external rinsing liquid is supplied via the supply channel 6 only in defined amounts, if no or insufficient vortex formation or
Durch diese Ausgestaltung des Hausgeräts kann ein luftgekühlter Trocknerteil ermöglicht werden, bei dem die Flusenfilterung wartungsfrei ermöglicht werden und darüber hinaus erhebliche Wassereinsparung ermöglicht werden kann. Die Flusenfilterung kann im Allgemeinen allein durch die Kondensatflüssigkeit ermöglicht werden und benötigt im Bedarfsfalle allenfalls eine geringe zusätzliche Menge von Spülflüssigkeit.This refinement of the domestic appliance makes it possible to provide an air-cooled dryer part, in which the lint filtering is made possible without maintenance and, moreover, considerable water savings can be made possible. The lint filtering can generally be made possible solely by the condensate liquid and, if necessary, at best requires a small additional amount of rinsing liquid.
Claims (17)
- Domestic appliance for the care of items of laundry with a dryer part (1) coolable by cooling air (K) and comprising a condenser, which comprises a hollow body (2) which can be flowed through substantially from below to above by moist process air (P) containing lint and from above to below by condensation liquid (22), wherein the condenser has a constriction (24) which is so constructed as to protect condensation liquid (22) which is running down at the inner walls (21) of the hollow body (2), from unhindered running down under the action of the counterflowing process air (P) by approximately roller-like turbulence (23), wherein lint filtering is formed by the interaction between the turbulence (23) and the flowing process air (P).
- Domestic appliance according to claim 1, in which the constriction (24) is formed to be encircling and annular.
- Domestic appliance according to claim 1 or 2, in which the constriction (24) is formed at an inlet (26) of the condenser.
- Domestic appliance according to claim 1 or 2, in which the constriction (24) is formed in the interior of the condenser, particularly in the hollow body (2).
- Domestic appliance according to any one of the preceding claims, in which the counterflowing flows of the condensation liquid (22) and the process air (P) are so formed that an equilibrium arises between the condensation liquid (22), which is flowing in from above into the roller-like turbulence (23), and the condensation liquid (22), which is flowing downwardly out of the roller-like turbulence (23).
- Domestic appliance according to claim 5, in which the roller-like turbulence (23) can be constantly generated during a drying process of the domestic appliance.
- Domestic appliance according to any one of the preceding claims, in which the height of the roller-like turbulence (23) is approximately 10 millimetres.
- Domestic appliance according to any one of the preceding claims, in which the roller-like turbulence (23) in the equilibrium state between inflow and outflow of the condensation liquid (22) has a liquid quantity between 25 millilitres and 100 millilitres, particularly approximately 50 millilitres.
- Domestic appliance according to any one of the preceding claims, in which the constriction (24) has an internal diameter (d) between 80% and 95%, particularly 90%, of the internal diameter which the process air guide of the domestic appliance has adjacent to this constriction (24).
- Domestic appliance according to any one of the preceding claims, in which arranged in the process air guide of the domestic appliance in front of the condenser in flow direction of the process air (P) is a liquid collecting device (7) in which liquid from a preceding laundry treatment process is collectible and which is introducible at the beginning of a succeeding laundry treatment process into the condenser for formation of the turbulence (23).
- Domestic appliance according to any one of the preceding claims, in which the outflow of the condensation liquid (22) from the turbulence (23) is dependent on an actively controlled reduction in the counter-force produced by the flowing process air (P) counter to the gravitational force of the condensation liquid (22).
- Domestic appliance according to any one of the preceding claims, in which rinsing liquid can be fed into the interior of the hollow body (2).
- Domestic appliance according to claim 12, in which rinsing liquid can be fed at the beginning of a drying process and/or at the end of a drying process.
- Domestic appliance according to claim 12 or 13, in which the quantity of rinsing liquid to be fed is dependent on the condensation liquid (22) which is present.
- Domestic appliance according to any one of the preceding claims, in which a sensor (3) for monitoring the swirl formation of the liquid is arranged in the region of the constriction (24), the sensor being connected with a control unit (4) for controlling the rinsing liquid feed.
- Domestic appliance according to any one of the preceding claims, in which on either side of the constriction (24) the hollow body (2) is widened to a diameter greater than the constriction (24).
- Domestic appliance according to any one of the preceding claims, which is constructed as a laundry dryer.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007024438A DE102007024438A1 (en) | 2007-05-25 | 2007-05-25 | Domestic appliance for the care of laundry, in particular washer-dryer |
PCT/EP2008/055905 WO2008145518A1 (en) | 2007-05-25 | 2008-05-14 | Domestic appliance for treating items of laundry, in particular washer dryer |
Publications (2)
Publication Number | Publication Date |
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EP2155949A1 EP2155949A1 (en) | 2010-02-24 |
EP2155949B1 true EP2155949B1 (en) | 2010-09-15 |
Family
ID=39665972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP08759587A Active EP2155949B1 (en) | 2007-05-25 | 2008-05-14 | Domestic appliance for treating items of laundry, in particular washer dryer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2155949B1 (en) |
CN (1) | CN101680156B (en) |
AT (1) | ATE481525T1 (en) |
DE (2) | DE102007024438A1 (en) |
WO (1) | WO2008145518A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008041474A1 (en) * | 2008-08-22 | 2010-02-25 | BSH Bosch und Siemens Hausgeräte GmbH | Household drying apparatus and method for cleaning a component, in particular an evaporator of a condenser device of such a household drying device |
DE102008054693A1 (en) | 2008-12-16 | 2010-06-17 | BSH Bosch und Siemens Hausgeräte GmbH | Condensation dryer and method for its operation |
DE102009001323A1 (en) | 2009-03-04 | 2010-09-09 | BSH Bosch und Siemens Hausgeräte GmbH | Laundry centrifuging device e.g. washing machine, has conveying units e.g. blower, and channel for conveying air from outside of container to interior of drum, where are formed to suck air from gap between drum and container |
DE102009002390A1 (en) | 2009-04-15 | 2010-10-21 | BSH Bosch und Siemens Hausgeräte GmbH | Washer dryer with a filter device and method for operating the washer dryer |
DE102010040189A1 (en) * | 2010-09-03 | 2012-03-08 | BSH Bosch und Siemens Hausgeräte GmbH | Method for cleaning an airway in a washer-dryer and a suitable washer-dryer for this purpose |
EP2992133A1 (en) * | 2013-04-29 | 2016-03-09 | Arçelik Anonim Sirketi | Air-cooled condenser laundry treatment machine with lint collecting means |
CN105714533B (en) * | 2014-12-01 | 2018-08-28 | 无锡小天鹅股份有限公司 | Clothes-drying device and dryer and washing-drying integral machine with it |
CN110804850B (en) * | 2018-07-19 | 2022-04-26 | 重庆海尔滚筒洗衣机有限公司 | Condenser for washing and drying integrated machine and control method of washing and drying integrated machine |
DE102020100759A1 (en) * | 2020-01-15 | 2021-07-15 | Miele & Cie. Kg | Method and control device for operating a cleaning device and cleaning device |
WO2021201703A1 (en) * | 2020-04-02 | 2021-10-07 | Fisher & Paykel Appliances Limited | Condensing duct for combination laundry washer dryer |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4969276A (en) * | 1989-09-27 | 1990-11-13 | Aqua-Vent Products, Inc. | Clothes dryer/filter/humidifier |
DE4132431A1 (en) * | 1991-09-28 | 1993-04-01 | Miele & Cie | LAUNDRY TREATMENT MACHINE LIKE DRYING DRYER OR WASHING DRYER |
DE4325209A1 (en) | 1993-07-27 | 1995-02-02 | Bosch Siemens Hausgeraete | Washing machine set up to dry |
DE4427361A1 (en) * | 1994-08-02 | 1996-02-08 | Bosch Siemens Hausgeraete | Washing machine set up to dry |
DE19522307C2 (en) * | 1995-06-20 | 2000-06-08 | Bsh Bosch Siemens Hausgeraete | Washing machine or dishwasher set up for drying |
EP1524361B1 (en) * | 2003-10-18 | 2006-10-04 | Lg Electronics Inc. | Condensing apparatus for washing and drying machine |
-
2007
- 2007-05-25 DE DE102007024438A patent/DE102007024438A1/en not_active Withdrawn
-
2008
- 2008-05-14 EP EP08759587A patent/EP2155949B1/en active Active
- 2008-05-14 WO PCT/EP2008/055905 patent/WO2008145518A1/en active Application Filing
- 2008-05-14 DE DE502008001341T patent/DE502008001341D1/en active Active
- 2008-05-14 CN CN2008800174491A patent/CN101680156B/en active Active
- 2008-05-14 AT AT08759587T patent/ATE481525T1/en active
Also Published As
Publication number | Publication date |
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DE502008001341D1 (en) | 2010-10-28 |
CN101680156B (en) | 2011-08-17 |
EP2155949A1 (en) | 2010-02-24 |
WO2008145518A1 (en) | 2008-12-04 |
ATE481525T1 (en) | 2010-10-15 |
DE102007024438A1 (en) | 2008-11-27 |
CN101680156A (en) | 2010-03-24 |
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