EP2781646B1 - Laundry dryer with lint filter cleaning with integrated stop valve - Google Patents

Laundry dryer with lint filter cleaning with integrated stop valve Download PDF

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Publication number
EP2781646B1
EP2781646B1 EP14002171.8A EP14002171A EP2781646B1 EP 2781646 B1 EP2781646 B1 EP 2781646B1 EP 14002171 A EP14002171 A EP 14002171A EP 2781646 B1 EP2781646 B1 EP 2781646B1
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EP
European Patent Office
Prior art keywords
valve
valve body
connecting channel
closing valve
laundry dryer
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EP14002171.8A
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German (de)
French (fr)
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EP2781646A1 (en
Inventor
Christoph Hansmann
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V-Zug AG
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V-Zug AG
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Priority to DK14002171.8T priority Critical patent/DK2781646T3/en
Priority to EP14002171.8A priority patent/EP2781646B1/en
Priority to PL14002171T priority patent/PL2781646T3/en
Priority to SI201430119A priority patent/SI2781646T1/en
Publication of EP2781646A1 publication Critical patent/EP2781646A1/en
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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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/36—Flow or velocity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/16—Air properties
    • D06F2105/24—Flow or velocity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/30—Drying processes 

Definitions

  • EP 2 495 363 describes a clothes dryer with a cleaning device for removing lint from the lint filter.
  • a cleaning device for removing lint from the lint filter.
  • the cleaning device has a suction nozzle on a first side of the lint filter and an air return on a second side of the lint filter. Between the suction nozzle and the air return, a fluff separator is arranged. Further, conveying means are provided to convey air from the suction nozzle through the lint separator for air return. In this way lint can be sucked from the first side of the lint filter. In the lint separator the extracted lint is removed and deposited in a lint container. Then the air is transported to the air return.
  • JP 2004 081717 describes a clothes dryer in which the air for cleaning device of the lint filter is driven via the process air fan.
  • the suction nozzle can be airtight separated from the air return so as to prevent air flow between the suction nozzle and the air return.
  • This design is based on the finding that in the drying operation of the device, the pressure drop across the lint filter without the closure valve (which increases with increasing filter contamination) leads to an air flow from the suction nozzle to the air return. This air flow passes through the lint and leads there to an undesirable water condensation, since the lint is usually cooler than the process air, whereby the function of the lint and thus the cleaning of the lint filter are impaired.
  • the aforementioned connecting channel has a first portion extending from the suction nozzle to the lint separator and a second portion extending from the lint separator to the air return.
  • a first and a second closure valve are advantageously provided, wherein the first closure valve in the first section and the second closure valve is in the second section.
  • the lint separator can be completely separated from the process air duct. This is advantageous because otherwise it is e.g. due to an overpressure in the process air duct to an air flow from the process air duct through the lint collector to the environment and thus in turn can lead to an undesirable condensation in the region of the separator.
  • the Flusenabscheider can be made gas-tight relative to the environment, but this is associated with additional expense.
  • the invention further relates to a method for operating a tumble dryer of this type.
  • a tumble dryer of this type in which laundry is dried, the closure valve is kept closed in order to prevent the flow of air through the connection channel.
  • the shutter valve is kept open to allow the air flow through the communication passage. In this way it can be prevented in normal operation that moist process air enters the lint separator.
  • the process air then flows through a lint filter 5 arranged, for example, in the user door or in the appliance base.
  • the process air then passes through the process air treatment 6 in the base region of the appliance, which extracts water from the process air flow and supplies heat.
  • the process air is usually initially cooled, so that there is a condensation of water comes, and then it is reheated.
  • the evaporator and the condenser of a heat pump can be used in a known manner.
  • the process air is fed back to the drum 2 via the blower 7.
  • the lint filter 5 is arranged in the process air duct 7 between the drum 2 and the process air treatment 6 and serves to retain lint in the process air.
  • the lint filter 5 has a first side 8, through which the process air enters the lint filter 5, and a second, opposite side 9, through which the process air exits the filter again.
  • Such a cleaning device has a suction nozzle 12, which is arranged on the first side of the lint filter 8, and an air return 13, which is located on the second side 9 of the lint filter 5 and in the present case as a suction nozzle 12 opposite return nozzle is configured.
  • a connecting channel which comprises the components 14 - 17 described in more detail below.
  • a position sensor 37 For detecting the rotational position of the valve body 28, a position sensor 37 is provided (see Fig. 5 ). In the illustrated embodiment, this is designed as a light barrier 38, with which marking openings 39 on the valve body 28 can be detected. In the present embodiment, four such marking openings 39 are provided, two each for the two closed and two each of the two open positions of the valve body. The marking openings can be coded to distinguish the positions.
  • a mechanical position sensor may be provided which detects the rotational position of the valve body, for example by means of microswitch.
  • shut-off valves are provided, one in the first section 14 from the suction nozzle to the lint separator 15, the other in the second section 17 from the lint separator 15 to the air return line 13.
  • only one closing valve may be provided in the region of the connecting channel. as well as the air flow between the suction nozzle 12 and the air return 13 can be prevented.
  • two shut-off valves are advantageous.

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft einen Wäschetrockner mit einer Reinigungsvorrichtung zum Entfernen von Flusen vom Flusenfilter. Die Erfindung betrifft auch ein Verfahren zum Betrieb eines derartigen Wäschetrockners.The invention relates to a tumble dryer with a cleaning device for removing lint from the lint filter. The invention also relates to a method for operating such a tumble dryer.

Hintergrundbackground

EP 2 495 363 beschreibt einen Wäschetrockner mit einer Reinigungsvorrichtung zum Entfernen von Flusen vom Flusenfilter. Mit einer solchen Reinigungsvorrichtung kann das Flusenfilter automatisch gereinigt werden, so dass eine manuelle Reinigung nicht mehr oder zumindest weniger häufig erforderlich ist. Die Reinigungsvorrichtung weist eine Absaugdüse auf einer ersten Seite des Flusenfilters sowie eine Luftrückführung auf einer zweiten Seite des Flusenfilters auf. Zwischen der Absaugdüse und der Luftrückführung ist ein Flusenabscheider angeordnet. Weiter sind Fördermittel vorgesehen, um Luft von der Absaugdüse durch den Flusenabscheider zur Luftrückführung zu fördern. Auf diese Weise können von der ersten Seite des Flusenfilters Flusen abgesaugt werden. Im Flusenabscheider werden die abgesaugten Flusen ausgeschieden und in einem Flusenbehälter deponiert. Sodann wird die Luft zur Luftrückführung befördert. EP 2 495 363 describes a clothes dryer with a cleaning device for removing lint from the lint filter. With such a cleaning device, the lint filter can be automatically cleaned so that manual cleaning is no longer required or at least less frequently. The cleaning device has a suction nozzle on a first side of the lint filter and an air return on a second side of the lint filter. Between the suction nozzle and the air return, a fluff separator is arranged. Further, conveying means are provided to convey air from the suction nozzle through the lint separator for air return. In this way lint can be sucked from the first side of the lint filter. In the lint separator the extracted lint is removed and deposited in a lint container. Then the air is transported to the air return.

JP 2004 081717 beschreibt einen Wäschetrockner, bei welchem die Luft für Reinigungsvorrichtung des Flusenfilters über den Prozessluftventilator angetrieben wird. JP 2004 081717 describes a clothes dryer in which the air for cleaning device of the lint filter is driven via the process air fan.

Darstellung der ErfindungPresentation of the invention

Es stellt sich die Aufgabe, einen Wäschetrockner der eingangs genannten Art bereitzustellen, der eine verbesserte Reinigung des Flusenfilters erlaubt. Diese Aufgabe wird vom Wäschetrockner gemäss Anspruch 1 gelöst.It has as its object to provide a tumble dryer of the type mentioned, which allows improved cleaning of the lint filter. This object is achieved by the tumble dryer according to claim 1.

Anspruchsgemäss besitzt der Wäschetrockner also eine Reinigungsvorrichtung für das Flusenfilter. Diese Reinigungsvorrichtung weist die folgenden Komponenten auf:

  • Eine auf einer ersten Seite des Flusenfilters angeordnete Absaugdüse. Diese dient dazu, Flusen vom Flusenfilter abzusaugen.
  • Eine auf einer zweiten Seite des Flusenfilters angeordnete Luftrückführung. Die zweite Seite liegt der ersten Seite des Flusenfilters gegenüber. Die Luftrückführung dient dazu, die von der Absaugdüse angesaugte Luft in den Prozessluftkanal zurückzuführen. Vorteilhaft ist sie auch als Düse ausgestaltet und gegenüber der Absaugdüse angeordnet, um das Absaugen der Flusen zu unterstützen.
  • Einen Verbindungskanal, der die Ansaugdüse mit der Luftrückführung verbindet. Dieser dient dazu, die Luft von der Ansaugdüse zur Luftrückführung zu führen.
  • Einen im Verbindungskanal angeordneten Flusenabscheider, um Flusen aus der von der Absaugdüse abgesaugten Luft abzuscheiden.
  • Im Verbindungskanal angeordnete Fördermittel in Form eines Gebläses, um Luft durch den Verbindungskanal von der Absaugdüse durch den Flusenabscheider zur Luftrückführung zu fördern.
  • Mindestens ein im Verbindungskanal angeordnetes Verschlussventil, um wahlweise einen Luftfluss durch den Verbindungskanal zu unterbinden.
Accordingly, the clothes dryer has a cleaning device for the lint filter. This cleaning device has the following components:
  • A suction nozzle arranged on a first side of the lint filter. This serves to suck lint from the lint filter.
  • An air return located on a second side of the lint filter. The second side faces the first side of the lint filter. The air return is used to return the sucked by the suction air into the process air duct. Advantageously, it is designed as a nozzle and arranged opposite the suction nozzle to assist the suction of the lint.
  • A connecting channel connecting the suction nozzle to the air return. This serves to guide the air from the intake nozzle to the air return.
  • A fluff separator arranged in the connection channel for separating lint from the air extracted from the suction nozzle.
  • In the connecting channel arranged conveying means in the form of a blower to promote air through the connecting channel from the suction nozzle through the lint separator for air return.
  • At least one closure valve arranged in the connection channel, in order optionally to prevent an air flow through the connection channel.

Mit dem erwähnten Verschlussventil kann die Absaugdüse luftdicht von der Luftrückführung getrennt werden, um so einen Luftfluss zwischen Absaugdüse und Luftrückführung zu verhindern.With the mentioned closure valve, the suction nozzle can be airtight separated from the air return so as to prevent air flow between the suction nozzle and the air return.

Dieser Konstruktion liegt die Erkenntnis zugrunde, dass im Trocknungsbetrieb des Geräts der (mit zunehmender Filterverschmutzung immer höher werdende) Druckabfall über dem Flusenfilter ohne das Verschlussventil zu einem Luftstrom von der Absaugdüse zur Luftrückführung führt. Dieser Luftstrom durchläuft den Flusenabscheider und führt dort zu einer unerwünschten Wasserkondensation, da der Flusenabscheider in der Regel kühler als die Prozessluft ist, wodurch die Funktion des Flusenabscheiders und somit die Reinigung des Flusenfilters beeinträchtigt werden.This design is based on the finding that in the drying operation of the device, the pressure drop across the lint filter without the closure valve (which increases with increasing filter contamination) leads to an air flow from the suction nozzle to the air return. This air flow passes through the lint and leads there to an undesirable water condensation, since the lint is usually cooler than the process air, whereby the function of the lint and thus the cleaning of the lint filter are impaired.

In vielen Fällen besitzt der erwähnte Verbindungskanal einen ersten Abschnitt, der sich von der Ansaugdüse zum Flusenabscheider erstreckt, sowie einen zweiten Abschnitt, der sich vom Flusenabscheider zur Luftrückführung erstreckt. In diesem Falle sind vorteilhaft ein erstes und ein zweites Verschlussventil vorgesehen, wobei sich das erste Verschlussventil im ersten Abschnitt und das zweite Verschlussventil im zweiten Abschnitt befindet. Auf diese Weise kann im Normalbetrieb des Geräts der Flusenabscheider völlig vom Prozessluftkanal getrennt werden. Dies ist von Vorteil, da es ansonsten z.B. aufgrund eines Überdrucks im Prozessluftkanal zu einer Luftströmung vom Prozessluftkanal durch den Flusenabscheider an die Umgebung und somit wiederum zu einer unerwünschten Kondensation im Bereich des Abscheiders kommen kann. Alternativ kann der Flusenabscheider gegenüber der Umgebung gasdicht ausgestaltet werden, was jedoch mit Mehraufwand verbunden ist.In many cases, the aforementioned connecting channel has a first portion extending from the suction nozzle to the lint separator and a second portion extending from the lint separator to the air return. In this case, a first and a second closure valve are advantageously provided, wherein the first closure valve in the first section and the second closure valve is in the second section. In this way, during normal operation of the device, the lint separator can be completely separated from the process air duct. This is advantageous because otherwise it is e.g. due to an overpressure in the process air duct to an air flow from the process air duct through the lint collector to the environment and thus in turn can lead to an undesirable condensation in the region of the separator. Alternatively, the Flusenabscheider can be made gas-tight relative to the environment, but this is associated with additional expense.

In einer weiteren vorteilhaften Ausführung besitzt das Verschlussventil einen um mehr als 360° drehbaren Ventilkörper in einem Ventilgehäuse, sowie einen Drehantrieb für den Ventilkörper. Das Ventilgehäuse besitzt einen Eingang sowie einen Ausgang, die mit dem Verbindungskanal verbunden sind. Der Ventilkörper weist einen Durchgang auf, welcher in einer "offenen Drehposition" des Ventilkörpers eine Verbindung zwischen dem Ein- und Ausgang des Ventilgehäuses bildet, während in einer "geschlossenen Drehposition" des Ventilkörpers der Ventilkörper die Verbindung zwischen Ein- und Ausgang des Ventilgehäuses blockiert. Weiter besitzt das Verschlussventil einen Positionsgeber, mit welchem die offene und/oder geschlossene Drehposition des Ventilkörpers detektiert werden kann. Diese Ausgestaltung hat den Vorteil, dass der Drehantrieb keine bestimmte Drehrichtung benötigt, so dass ein preisgünstiger Motor eingesetzt werden kann, wie z.B. ein Synchronmotor.In a further advantageous embodiment, the closure valve has a more than 360 ° rotatable valve body in a valve housing, and a rotary drive for the valve body. The valve body has an input and an output connected to the connection channel are connected. The valve body has a passage which in an "open rotational position" of the valve body forms a connection between the inlet and outlet of the valve housing, while in a "closed rotational position" of the valve body of the valve body blocks the connection between the inlet and outlet of the valve housing. Next, the closure valve has a position sensor with which the open and / or closed rotational position of the valve body can be detected. This embodiment has the advantage that the rotary drive does not require a specific direction of rotation, so that a low-cost motor can be used, such as a synchronous motor.

Die Erfindung betrifft weiter ein Verfahren zum Betrieb eines Wäschetrockners dieser Art. Im Rahmen dieses Verfahrens wird in einem Normalbetrieb, in welchem Wäsche getrocknet wird, das Verschlussventil geschlossen gehalten, um den Luftfluss durch den Verbindungskanal zu unterbinden. Andererseits wird im Reinigungsbetrieb, in welchem das Flusenfilter gereinigt wird, das Verschlussventil offen gehalten, um den Luftfluss durch den Verbindungskanal zu erlauben. Auf diese Weise kann im Normalbetrieb verhindert werden, dass feuchte Prozessluft in den Flusenabscheider gelangt.The invention further relates to a method for operating a tumble dryer of this type. In the context of this method, in a normal operation, in which laundry is dried, the closure valve is kept closed in order to prevent the flow of air through the connection channel. On the other hand, in the cleaning operation in which the lint filter is cleaned, the shutter valve is kept open to allow the air flow through the communication passage. In this way it can be prevented in normal operation that moist process air enters the lint separator.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere Ausgestaltungen, Vorteile und Anwendungen der Erfindung ergeben sich aus den abhängigen Ansprüchen und aus der nun folgenden Beschreibung anhand der Figuren. Dabei zeigen:

  • Fig. 1 einen Wäschetrockner mit einer Reinigungsvorrichtung für das Flusensieb,
  • Fig. 2 einige im vorliegenden Kontext wichtige Komponenten des Wäschetrockners,
  • Fig. 3 die Ansicht einer Ausführung des Verschlussventils,
  • Fig. 4 das Verschlussventil nach Fig. 3 mit geöffnetem Ventilgehäuse,
  • Fig. 5 das Verschlussventil nach Fig. 3 in Explosionsdarstellung,
  • Fig. 6 einen Schnitt durch ein Verschlussventil senkrecht zur Drehachse des Ventilkörpers in offenem Zustand des Verschlussventils und
  • Fig. 7 den Schnitt von Fig. 6 in geschlossenem Zustand des Verschlussventils.
Further embodiments, advantages and applications of the invention will become apparent from the dependent claims and from the following description with reference to FIGS. Showing:
  • Fig. 1 a clothes dryer with a cleaning device for the lint filter,
  • Fig. 2 some important components of the tumble dryer in the present context,
  • Fig. 3 the view of an embodiment of the closure valve,
  • Fig. 4 the closing valve after Fig. 3 with open valve housing,
  • Fig. 5 the closing valve after Fig. 3 in exploded view,
  • Fig. 6 a section through a closure valve perpendicular to the axis of rotation of the valve body in the open state of the closure valve and
  • Fig. 7 the cut of Fig. 6 in the closed state of the closure valve.

Wege zur Ausführung der ErfindungWays to carry out the invention

Ein Wäschetrockner der hier beschriebenen Art besitzt, wie in Fig. 1 und 2 dargestellt, ein Gehäuse 1, in welchem die übrigen Komponenten des Geräts angeordnet sind. Insbesondere befindet sich im Gehäuse 1 eine Trommel 2 mit beispielsweise horizontaler Drehachse 3. Die Trommel 2 dient der Aufnahme von Wäsche und kann im Betrieb um die Drehachse 3 rotiert werden. Nach vorne ist die Trommel 2 von einer Benutzertüre verschlossen, welche an der Frontseite 6 des Geräts angeordnet ist. Weiter ist im Wäschetrockner ein Gebläse 3 vorgesehen (siehe Fig. 2), um in der Trommel 2 mit einem Prozessluftstrom zu erzeugen. In den meisten bekannten Geräten durchsetzt dieser Prozessluftstrom die Trommel 2 von hinten nach vorne und verlässt die Trommel 2 durch ein Lochgitter in der Benutzertüre. Sodann durchströmt die Prozessluft ein z.B. in der Benutzertüre oder im Gerätesockel angeordnetes Flusenfilter 5. Dann durchläuft die Prozessluft die Prozessluftaufbereitung 6 im Sockelbereich des Geräts, welche dem Prozessluftstrom Wasser entzieht und Wärme zuführt. Hierzu wird die Prozessluft in der Regel zunächst abgekühlt, so dass es zu einer Auskondensation von Wasser kommt, und danach wird sie wieder erhitzt. Zum Abkühlen und Erhitzen können in bekannter Weise der Verdampfer und der Kondensator einer Wärmepumpe eingesetzt werden. Schliesslich wird die Prozessluft über das Gebläse 7 wieder zurück zur Trommel 2 geführt.A tumble dryer of the type described here has, as in Fig. 1 and 2 shown, a housing 1, in which the remaining components of the device are arranged. In particular, in the housing 1 is a drum 2 with, for example, horizontal axis of rotation 3. The drum 2 serves to accommodate laundry and can be rotated about the axis of rotation 3 during operation. To the front, the drum 2 is closed by a user door, which is arranged on the front side 6 of the device. Next, a blower 3 is provided in the tumble dryer (see Fig. 2 ) to generate in the drum 2 with a process air flow. In most known devices, this process air flow passes through the drum 2 from the rear to the front and leaves the drum 2 through a perforated grid in the user door. The process air then flows through a lint filter 5 arranged, for example, in the user door or in the appliance base. The process air then passes through the process air treatment 6 in the base region of the appliance, which extracts water from the process air flow and supplies heat. For this purpose, the process air is usually initially cooled, so that there is a condensation of water comes, and then it is reheated. For cooling and heating, the evaporator and the condenser of a heat pump can be used in a known manner. Finally, the process air is fed back to the drum 2 via the blower 7.

Das Flusenfilter 5 ist im Prozessluftkanal 7 zwischen der Trommel 2 und der Prozessluftaufbereitung 6 angeordnet und dient dazu, Flusen in der Prozessluft zurückzuhalten. Das Flusenfilter 5 besitzt eine erste Seite 8, durch welche die Prozessluft in das Flusenfilter 5 eintritt, sowie eine zweite, gegenüber liegende Seite 9, durch welche die Prozessluft wieder aus dem Filter austritt.The lint filter 5 is arranged in the process air duct 7 between the drum 2 and the process air treatment 6 and serves to retain lint in the process air. The lint filter 5 has a first side 8, through which the process air enters the lint filter 5, and a second, opposite side 9, through which the process air exits the filter again.

Wie in Fig. 2 dargestellt, ist im Bereich des Flusenfilters 5 eine Reinigungsvorrichtung 10 vorgesehen, mit der die auf der ersten Seite 8 des Flusenfilters abgelagerten Flusen entfernt werden können. Im vorliegenden Fall kann insbesondere eine Reinigungsvorrichtung der in EP 2 495 363 beschriebenen Art eingesetzt werden.As in Fig. 2 1, a cleaning device 10 is provided in the region of the lint filter 5 with which the lint deposited on the first side 8 of the lint filter can be removed. In the present case, in particular a cleaning device of the in EP 2 495 363 be used type described.

Eine derartige Reinigungsvorrichtung besitzt eine Absaugdüse 12, welche auf der ersten Seite des Flusenfilters 8 angeordnet ist, sowie eine Luftrückführung 13, die sich auf der zweiten Seite 9 des Flusenfilters 5 befindet und im vorliegenden Fall als eine der Absaugdüse 12 gegenüber liegende Rückführdüse ausgestaltet ist.Such a cleaning device has a suction nozzle 12, which is arranged on the first side of the lint filter 8, and an air return 13, which is located on the second side 9 of the lint filter 5 and in the present case as a suction nozzle 12 opposite return nozzle is configured.

Die Absaugdüse 12 sowie Luftrückführung 13 sind vorzugsweise, wie in EP 2 495 363 beschrieben, länglich ausgestaltet und erstrecken sich radial von der Mitte bis zur Peripherie des kreisflächenförmigen Flusenfilters 5. Das Flusenfilter 5 kann rotiert werden, so dass mit der Absaugdüse die gesamte Oberfläche des Flusenfilters 5 gereinigt werden kann.The suction nozzle 12 and air return 13 are preferably as in EP 2 495 363 described, elongated and extend radially from the center to the periphery of the circular lint filter 5. The lint filter 5 can be rotated so that the entire surface of the lint filter 5 can be cleaned with the suction nozzle.

Zwischen der Absaugdüse 12 und der Luftrückführung 13 verläuft ein Verbindungskanal, welcher die im Folgenden näher beschriebenen Komponenten 14 - 17 umfasst.Between the suction nozzle 12 and the air return 13 extends a connecting channel, which comprises the components 14 - 17 described in more detail below.

Zunächst besitzt der Verbindungskanal einen ersten Abschnitt 14, der sich von der Ansaugdüse 12 zu einem Flusenabscheider 15 erstreckt. Der Flusenabscheider 15 dient dazu, die in der Luft von der Absaugdüse 12 enthaltenen Flusen in einen geeigneten Flusenbehälter abzuscheiden, und ist z.B. in der in EP 2 495 363 gezeigten Art aufgebaut. Nach dem Flusenabscheider 15 gelangt die Luft über einen Ventilator 16 in einen zweiten Abschnitt 17 des Kanals, durch den sie zur Luftrückführung 13 und zurück in den Prozessluftkanal 7 fliesst.First, the connecting channel has a first portion 14 which extends from the suction nozzle 12 to a fluff separator 15. The lint separator 15 serves to separate the lint contained in the air from the suction nozzle 12 into a suitable fluff container, and is eg in the lint EP 2 495 363 constructed kind shown. After the lint separator 15, the air passes via a fan 16 into a second section 17 of the channel, through which it flows to the air return line 13 and back into the process air duct 7.

Wie bereits erwähnt, ist im Verbindungskanal 14 -17 mindestens ein Verschlussventil angeordnet, mit welchem der Luftfluss durch den Verbindungskanal wahlweise unterbunden oder zugelassen werden kann. In der dargestellten Ausführung sind zwei solche Verschlussventile 20, 21 vorgesehen. Das erste Verschlussventil 20 befindet sich im ersten Abschnitt 14, während das zweite Verschlussventil 21 im zweiten Abschnitt 17 angeordnet ist. Zur Betätigung der Verschlussventile 20, 21 ist in der vorliegenden Ausführung ein gemeinsamer Ventilantrieb 22 vorgesehen, der von einer Steuerung des Wäschetrockners gesteuert wird.As already mentioned, at least one closure valve is arranged in the connection channel 14 -17, with which the air flow through the connection channel can optionally be prevented or permitted. In the illustrated embodiment, two such closure valves 20, 21 are provided. The first closure valve 20 is located in the first section 14, while the second closure valve 21 is arranged in the second section 17. To actuate the closure valves 20, 21, a common valve drive 22 is provided in the present embodiment, which is controlled by a controller of the clothes dryer.

Fig. 3 - 7 zeigen eine bevorzugte Ausführung der Verschlussventile 20, 21. Wie ersichtlich, besitzen die Verschlussventile 20, 21 ein gemeinsamen Ventilgehäuse mit einem Bodenteil 25a und einem Deckelteil 25b. Jedes Verschlussventil besitzt einen Eingang 26 sowie einen Ausgang 27, die vom Ventilgehäuse 25a, 25b gebildet werden und mit den Abschnitten 14 bzw. 17 verbunden sind. Fig. 3 - 7 show a preferred embodiment of the closure valves 20, 21. As can be seen, the closure valves 20, 21 have a common valve housing with a bottom part 25a and a cover part 25b. Each closure valve has an inlet 26 and an outlet 27 which are formed by the valve housing 25a, 25b and connected to the sections 14 and 17, respectively.

Im Ventilgehäuse 25a, 25b ist ein Ventilkörper 28 angeordnet, der in der vorliegenden Ausführung beiden Verschlussventilen 20, 21 gemeinsam ist. Der Ventilkörper ist um eine Drehachse 30 um Winkel von mehr als 360° frei drehbar und kann vom Ventilantrieb 22 zur Drehung angetrieben werden. Der Ventilkörper 28 besitzt zwei sich quer zur Drehachse 30 erstreckende Durchgänge 31, von denen ein erster dem ersten Verschlussventil 20 und ein zweiter dem zweiten Verschlussventil 21 zugeordnet ist.In the valve housing 25a, 25b, a valve body 28 is arranged, which is common in the present embodiment, two shut-off valves 20, 21. The valve body is freely rotatable about an axis of rotation 30 by more than 360 ° and can be driven by the valve drive 22 for rotation. The valve body 28 has two transverse to the axis of rotation 30 extending passages 31, of which a first the first closing valve 20 and a second is associated with the second closure valve 21.

Der Ventilkörper 28 kann vom Ventilantrieb 22 in zwei unterschiedliche Drehpositionen gebracht werden:

  • In einer offenen Drehposition, welche in Fig. 6 dargestellt ist, bildet der Durchgang 31 in beiden Verschlussventilen 20, 21 eine Verbindung zwischen dem Eingang 26 und dem Ausgang 27.
  • In einer geschlossenen Drehposition, in welcher der Ventilkörper 28 um 90° gegenüber der offenen Drehposition rotiert ist und die in Fig. 7 dargestellt wird, blockiert der Ventilkörper in beiden Verschlussventilen die Verbindung zwischen dem Eingang 26 und dem Ausgang 27, indem sich der Durchgang 31 in einer Stellung ungefähr senkrecht zu dieser Verbindung befindet.
The valve body 28 can be brought by the valve drive 22 in two different rotational positions:
  • In an open rotational position, which in Fig. 6 is shown, the passage 31 forms a connection between the inlet 26 and the outlet 27 in both closing valves 20, 21.
  • In a closed rotational position, in which the valve body 28 is rotated by 90 ° relative to the open rotational position and the in Fig. 7 is shown blocking the valve body in both shut-off valves, the connection between the input 26 and the output 27 by the passage 31 is in a position approximately perpendicular to this compound.

Die beiden Verschlussventile 20, 21 sind mit einem ersten Dichtungsring 34, der zwischen dem Ventilkörper 28 und dem Gehäuse 25a, 25b angeordnet ist, luftdicht voneinander getrennt. Ein zweiter Dichtungsring 35, und allenfalls weitere Dichtungsringe, dichtet bzw. dichten den Ventilkörper gegen aussen ab.The two closing valves 20, 21 are airtightly separated from each other by a first sealing ring 34 which is arranged between the valve body 28 and the housing 25a, 25b. A second sealing ring 35, and possibly further sealing rings, seals or seal the valve body from the outside.

Zur Detektion der Drehposition des Ventilkörpers 28 ist ein Positionsgeber 37 vorgesehen (siehe Fig. 5). In der dargestellten Ausführung ist dieser als Lichtschranke 38 ausgebildet, mit welcher Markierungsöffnungen 39 am Ventilkörper 28 detektiert werden können. In der vorliegenden Ausführung sind vier solche Markierungsöffnungen 39 vorgesehen, je zwei für die beiden geschlossenen sowie je zwei die beiden offenen Stellungen des Ventilkörpers. Die Markierungsöffnungen können zur Unterscheidung der Stellungen kodiert sein.For detecting the rotational position of the valve body 28, a position sensor 37 is provided (see Fig. 5 ). In the illustrated embodiment, this is designed as a light barrier 38, with which marking openings 39 on the valve body 28 can be detected. In the present embodiment, four such marking openings 39 are provided, two each for the two closed and two each of the two open positions of the valve body. The marking openings can be coded to distinguish the positions.

Anstelle eines optischen Positionsgebers kann z.B. auch ein mechanischer Positionsgeber vorgesehen sein, der die Drehposition des Ventilkörpers beispielsweise mittels Mikroschalter detektiert.Instead of an optical position sensor, e.g. Also, a mechanical position sensor may be provided which detects the rotational position of the valve body, for example by means of microswitch.

Wie oben erwähnt, kann der Ventilantrieb dank dem Positionsgeber einen kostengünstigen Motor einsetzen, der keine definierte Anfahrtsrichtung besitzt, insbesondere einen Synchronmotor. Vorzugsweise ist dem Motor ein Untersetzungsgetriebe nachgeschaltet.As mentioned above, thanks to the position sensor, the valve drive can use a cost-effective motor, which has no defined approach direction, in particular a synchronous motor. Preferably, the motor is followed by a reduction gear.

Der Wäschetrockner kann von der Steuerung des Geräts in zwei Betriebsmoden betrieben werden:

  • Im Normalbetrieb kann Wäsche in der Trommel 2 getrocknet werden. Hierbei sind das Gebläse 3 sowie die Prozessluftaufbereitung 6 in Betrieb und trocknen die Wäsche in an sich bekannter Weise. Alle Verschlussventile 20, 21 sind geschlossen, so dass die Prozessluft nicht in den Flusenabscheider 15 gelangen kann.
  • Im Reinigungsbetrieb sind das Gebläse 3 und die Prozessluftaufbereitung 6 in der Regel ausgeschaltet, aber die Reinigungsvorrichtung 10 ist zur Reinigung des Flusenfilters 5 von Flusen in Betrieb. In diesem Betriebsmodus fördert der Ventilator 16 Luft von der Ansaugdüse 12 zur Luftrückführung 13. Alle Verschlussventile 20, 21 sind offen und der Flusenabscheider 15 scheidet die von der Absaugdüse 12 kommenden Flusen aus der Luft aus.
The tumble dryer can be operated by the unit's controller in two operating modes:
  • In normal operation laundry can be dried in the drum 2. Here are the fan 3 and the process air treatment 6 in operation and dry the laundry in a conventional manner. All closing valves 20, 21 are closed so that the process air can not get into the lint separator 15.
  • In the cleaning operation, the blower 3 and the process air treatment 6 are usually switched off, but the cleaning device 10 is for cleaning the lint filter 5 of lint in operation. In this mode of operation, the fan 16 delivers air from the suction nozzle 12 to the air return 13. All shut-off valves 20, 21 are open and the lint separator 15 separates the lint from the suction nozzle 12 from the air.

In der oben beschriebenen Ausführung sind zwei Verschlussventile vorgesehen, eines davon im ersten Abschnitt 14 von der Absaugdüse zum Flusenabscheider 15, das andere im zweiten Abschnitt 17 vom Flusenabscheider 15 zur Luftrückführung 13. Es kann jedoch auch lediglich ein Verschlussventil im Bereich des Verbindungskanals vorgesehen sein, da auch so der Luftfluss zwischen der Absaugdüse 12 und der Luftrückführung 13 unterbunden werden kann. Aus den oben erwähnten Gründen sind jedoch zwei Verschlussventile von Vorteil.In the embodiment described above, two shut-off valves are provided, one in the first section 14 from the suction nozzle to the lint separator 15, the other in the second section 17 from the lint separator 15 to the air return line 13. However, only one closing valve may be provided in the region of the connecting channel. as well as the air flow between the suction nozzle 12 and the air return 13 can be prevented. For the reasons mentioned above, however, two shut-off valves are advantageous.

Anstelle eines zylindrischen Ventilkörpers 28 der oben beschriebenen Art kann z.B. auch ein Ventilkörper vorgesehen sein, welcher zwei über eine Antriebsachse verbundene Verschlussklappen aufweist. Es können auch getrennte Ventilkörper mit jeweils einem eigenen Ventilantrieb für die beiden Verschlussventile vorgesehen sein.Instead of a cylindrical valve body 28 of the type described above, for example, a valve body may be provided which has two shutters connected via a drive axle. It can also be provided separate valve body, each with its own valve drive for the two closing valves.

Während in der vorliegenden Anmeldung bevorzugte Ausführungen der Erfindung beschrieben sind, ist klar darauf hinzuweisen, dass die Erfindung nicht auf diese beschränkt ist und in auch anderer Weise innerhalb des Umfangs der folgenden Ansprüche ausgeführt werden kann.While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited to these and may be practiced otherwise within the scope of the following claims.

Claims (7)

  1. Laundry dryer with a fluff filter (5) as well as with a cleaning device (10) for the fluff filter (5), wherein the laundry dryer has a fan (3) for generating a process air stream, a drum (2) for receiving the laundry and a process air treatment means (6) for extracting water from the process air stream and for supplying heat into the process air stream, wherein the fluff filter (5) is arranged in the process air stream between the drum (2) and the process air treatment means (6) in an air channel (7) for the process air in such a way that the process air stream enters through a first side (8) of the fluff filter (5) and exits through a second side (9) of the fluff filter (5), and wherein the cleaning device (10) has:
    a suction nozzle (12) arranged on the first side (8) of the fluff filter (5),
    an air return (13) arranged on the second side (9) of the fluff filter (5),
    a connecting channel (14 - 17) connecting the suction nozzle (12) and the air return (13),
    a fluff separator (15) arranged in the connecting channel (14 - 17) as well as
    transport means (16) arranged in the connecting channel (14 - 17) formed as fan, in order to transport air through the connecting channel (14 - 17) from the suction nozzle (12) through the fluff separator (15) to the air return (13),
    characterized in that at least one closing valve (20, 21) is arranged in the connecting channel (14 - 17), in order to optionally supress an air flow through the connecting channel (14 - 17).
  2. Laundry dryer according to claim 1,
    wherein the connecting channel (14 - 17) has a first section (14) which extends from the suction nozzle to the fluff separator (15), as well as a second section (17) which extends from the fluff separator (15) to the air return (13), wherein a first closing valve (20) is arranged in the first section (14) and a second closing valve is arranged in the second section (17).
  3. Laundry dryer according to claim 2,
    wherein the first and the second closing valve (20, 21) have a common valve drive (22).
  4. Laundry dryer according to one of the preceding claims, wherein the at least one closing valve (20, 21) has a valve body (28), which is rotatable by more than 360°, in a valve housing (25a, 25b), wherein the valve drive (22) forms a rotary drive for the valve body (28), wherein the valve body (28) has a passage (31) which forms a connection between an inlet (26) and an outlet (27) of the valve housing (25a, 25b) in an open rotation position of the valve body (28), while the valve body (28) blocks the connection between the inlet (26) and the outlet (27) of the valve housing (25a, 25b) in a closed rotation position of the valve body (28), and wherein the closing valve (20, 21) has a position sensor (37) by means of which the open and/or the closed rotation position of the valve body (28) is detectable.
  5. Laundry dryer according to claim 4,
    wherein the rotary drive is a synchronous motor.
  6. Laundry dryer according to claim 3 and one of the claims 4 or 5, wherein the first and the second closing valve (20, 21) have a common valve body (28) with a first passage (31) for the first closing valve (20, 21) and a second passage (31) for the second closing valve (20, 21).
  7. Method for operating the laundry dryer according to one of the preceding claims, wherein in a normal operation, during which laundry is dried, the closing valve (20, 21) is kept closed in order to supress an air flow through the connecting channel (14 - 17), and wherein in a cleaning operation, during which the fluff filter (5) is cleaned, the closing valve (20, 21) is kept open in order to allow the air flow through the connecting channel (14 - 17).
EP14002171.8A 2014-06-24 2014-06-24 Laundry dryer with lint filter cleaning with integrated stop valve Active EP2781646B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK14002171.8T DK2781646T3 (en) 2014-06-24 2014-06-24 Dryer with lint filter cleaning and with integrated shut-off valve
EP14002171.8A EP2781646B1 (en) 2014-06-24 2014-06-24 Laundry dryer with lint filter cleaning with integrated stop valve
PL14002171T PL2781646T3 (en) 2014-06-24 2014-06-24 Laundry dryer with lint filter cleaning with integrated stop valve
SI201430119A SI2781646T1 (en) 2014-06-24 2014-06-24 Laundry dryer with lint filter cleaning with integrated stop valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14002171.8A EP2781646B1 (en) 2014-06-24 2014-06-24 Laundry dryer with lint filter cleaning with integrated stop valve

Publications (2)

Publication Number Publication Date
EP2781646A1 EP2781646A1 (en) 2014-09-24
EP2781646B1 true EP2781646B1 (en) 2016-10-19

Family

ID=51133758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14002171.8A Active EP2781646B1 (en) 2014-06-24 2014-06-24 Laundry dryer with lint filter cleaning with integrated stop valve

Country Status (4)

Country Link
EP (1) EP2781646B1 (en)
DK (1) DK2781646T3 (en)
PL (1) PL2781646T3 (en)
SI (1) SI2781646T1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL3112514T3 (en) * 2015-06-30 2018-05-30 V-Zug Ag Laundry dryer with lint filter cartridge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4700492A (en) * 1986-02-05 1987-10-20 Whirlpool Corporation Air actuated automatic lint screen cleaning system for dryer
JP2004081717A (en) * 2002-08-29 2004-03-18 Nippon Asahi Kiko Hanbai Kk Lint removing device
CH704608A2 (en) 2011-03-01 2012-09-14 V Zug Ag Dryers with Flusenfilterreinigung.

Also Published As

Publication number Publication date
DK2781646T3 (en) 2017-01-30
SI2781646T1 (en) 2017-01-31
EP2781646A1 (en) 2014-09-24
PL2781646T3 (en) 2017-03-31

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