EP2314759B1 - Wäschetrocknungsmaschine mit einem System zur Waschung des Trockenluftfilters dieser Maschine - Google Patents

Wäschetrocknungsmaschine mit einem System zur Waschung des Trockenluftfilters dieser Maschine Download PDF

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Publication number
EP2314759B1
EP2314759B1 EP09425414A EP09425414A EP2314759B1 EP 2314759 B1 EP2314759 B1 EP 2314759B1 EP 09425414 A EP09425414 A EP 09425414A EP 09425414 A EP09425414 A EP 09425414A EP 2314759 B1 EP2314759 B1 EP 2314759B1
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Prior art keywords
machine
water
collection container
drain
container
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EP09425414A
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English (en)
French (fr)
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EP2314759A1 (de
Inventor
Silvano Fumagalli
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Candy SpA
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Candy SpA
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Priority to AT09425414T priority Critical patent/ATE547554T1/de
Priority to EP09425414A priority patent/EP2314759B1/de
Publication of EP2314759A1 publication Critical patent/EP2314759A1/de
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the present invention relates to a laundry dryer machine having a system for washing the drying air filter.
  • laundry dryer machines comprising a rotary drum designed to internally receive the laundry to be dried, means for heating the drying air and a condenser for removing the moisture contained in the drying air exiting the rotary drum. These parts are arranged within a casing of the household appliance.
  • the machine also comprises a special fan which successively circulates the drying air through the drum, the condenser and the heating means (typically an electrical resistor) during operation of the apparatus.
  • a special fan which successively circulates the drying air through the drum, the condenser and the heating means (typically an electrical resistor) during operation of the apparatus.
  • the laundry dryer comprises a container for collecting condensed water, which can be typically removed from the household appliance to allow the user to drain the condensate at the end of a drying cycle.
  • the drying air flow may carry impurities therein, such as fibers, threads, fluff, released from the laundry.
  • Prior art machines comprise a drying air filter downstream from the drum, which retains these air-borne impurities, and prevents them from being circulated within the machine.
  • the prior European patent application EP 0.816.549 discloses a washer-dryer machine including a rotating drum and a filter for trapping the fluff freed during the drying process.
  • the machine includes also a tank for collecting water for washing the filter and a tank for collecting the condensation.
  • the machine provides for an automatic operation for cleaning the filter with the rinsing water or with the condensation water at the end of a drying stage.
  • the object of this invention is to provide a laundry dryer machine, which allows the filter to be maintained in a satisfactorily clean state, without requiring laborious maintenance or washing procedures.
  • a further object of the invention is to provide a machine having a simple and inexpensive structure.
  • Another object of the invention is to provide a machine that can also maintain the condenser in a satisfactorily clean state, without requiring laborious maintenance procedures.
  • a laundry dryer machine that comprises a drum with a cavity for receiving the laundry to be dried, means for heating a drying air, a condenser for removing moisture from the drying air and conveying means, for successively circulating the drying air through the drum, the condenser and the heating means, the machine further comprising a container for collecting the water condensed in the condenser and a drying air filter, characterized in that said container has at least one drain for draining the water contained in the container towards said filter.
  • a laundry dryer machine 11 which comprises an outer casing 12, with a rotary drum 13, a condenser 15 and heating means 14 arranged therein.
  • the rotary drum 13 has a cavity 41 ( Fig. 3 ) for receiving the laundry to be dried, and is rotated, in use, by known motor means.
  • the drum 13 has a front opening 50, through which the laundry may be loaded and unloaded from the drying cavity 41.
  • the drum 13 has a substantially horizontal axis of rotation.
  • An opening is formed on the front of the casing 12, for the user to access the interior of the drum 13 therethrough.
  • the opening can be closed by a door 39, preferably formed as a transparent window hinged to the casing 12 of the household appliance.
  • the heating means 14 have the task of heating the drying air 24 circulating in the household appliance.
  • these means are made by an electrical resistor 14 placed on the back of the machine 12, i.e. on the side opposite to the window 39.
  • the condenser 15 has the task of removing moisture from the drying air 24 exiting the drum 13 and may be formed per se according to the prior art.
  • the condenser 15 is placed under the drum 13.
  • the laundry dryer 11 also comprises conveying means 16 for successively circulating the drying air through the rotary drum 13, the condenser 15 and the heating means 14.
  • These conveying means preferably include a fan 16 placed downstream from the condenser 15 and upstream from the heating means 14.
  • the laundry dryer machine 11 also comprises a fan 17 for causing cooling air 19 to pass through the condenser 15, by introducing it into the casing of the household appliance through the inlet 18.
  • the machine 11 also comprises a drying air filter 26, downstream from the drum 13 and upstream from the condenser 15.
  • a drying air filter 26 has the task of trapping any impurity carried by the drying air exiting the drum 13, such as fibers, lint or fluff released from the laundry during drying.
  • the filter 26 is made of known filtering meshes, and has a substantially flat shape, vertically arranged close to a front wall of the machine.
  • a tank 30 is placed downstream from the condenser 13 for collecting condensed water, the latter being pumped towards a container 32 by the pump 31.
  • the pump 31 conveys the condensed water through the conduit 33 to a nozzle 34 located above a top opening 35 for filling the container 32.
  • the container 32 is designed to collect the condensed water and is located at the opening 50 of the drum 13, within an annular wall 53, 70 of the fixed frame of the machine. In use, the container 32 is preferably engaged in a frame 55 of the window 39 and, when the door 39 is closed, it remains within the casing 12.
  • the laundry dryer 11 comprises a passageway 51 for letting air out of the drum 13, that carries wet air towards the filter 26.
  • the passageway 51 is preferably formed between a bottom wall of the container 32 and the wall 53 of the machine frame.
  • the container 32 comprises a filter 71 located below the inlet 35 for the condensed water.
  • the laundry dryer 11 comprises control means, for controlling the various features and parts of the machine (rotation of the drum 13, heating by the resistor 14, operation of the fans 16, 17, etc.).
  • the control means are associated with a user interface, which may include knobs and/or pushbuttons, that the user may access from the front of the household appliance to control their operation.
  • the collection container 32 comprises at least one drain 75 for draining water through the filter 26.
  • the drain 75 is made by of an opening formed on a bottom wall of the container 32, above the filter 26.
  • the container 32 comprises a plurality of drain openings 75, arranged along the filter 26.
  • the container 32 has means for feeding through the drain 75 a volume of water already collected in the container, thereby quickly lowering the level of water in the container to a predetermined height, lower than the maximum level that can be reached in the container 32.
  • the means for feeding a volume of water to the drain preferably comprise a valve 73, openable to put the inner volume of the container 32 in communication with the drain 75, thereby flushing the filter with a considerable volume of water.
  • the valve 73 has a closing member that can be moved by an actuator 74, of a type known per se.
  • the drain 75 is formed in a conduit 76 located at the lower part of the container, and separated from the main inner volume of the container.
  • the valve 73 is driven by the control means of the laundry dryer machine.
  • the maximum volume of drained water is at least one sixth of the overall volume of the container 32, preferably at least one fourth of such overall volume.
  • the flow of flushing water passes through the filter 26 and cleans away impurity buildups appeared during the drying cycle, thereby actually washing the filter and ensuring proper operation of the machine, both during the final step of the current drying cycle and in the following drying cycle.
  • the flushing water flows by gravity through the condenser 15 located downstream from the filter, at a lower level, too.
  • the drained water flows into the collection tank 30, where impurities are retained by a special filtering system upstream from the pump 31.
  • the container 32 also has an overflow conduit 72, which puts the interior volume of the container 32 in communication with the drain 75, particularly through the lower conduit 76.
  • the overflow conduit 72 has a top opening that opens into the container and defines the maximum water volume in the container 32.
  • Figure 4 shows an alternative embodiment of the container 132, which replaces the above described container 32.
  • the other components of the laundry dryer machine shall be intended to be unchanged from the first embodiment.
  • the container 132 has an overflow conduit 161 with a top opening 163 that puts it in communication with the interior of the container at a level close to the top end of the container.
  • the opening 163 defines the maximum water level in the container 132.
  • the container 132 also has a second conduit 160 that communicates with the interior of the container 132 through a top opening 164, located at a level separate from and lower than the opening 163.
  • Both openings 163 and 164 may be equipped with a downwardly bent pipe portion, for drawing water at a level lower than the water surface in the container.
  • Both conduits 160 and 161 lead to the drain 175, which is formed in the bottom wall of the container 132.
  • the conduits 160 and 161 are placed on opposite lateral sides of the container 132.
  • a valve comprising a closing member 162 is associated with the drain 175.
  • the conduit 160 may be alternately put in communication with the drain 175 or be hydraulically separated from the drain.
  • conduit 161 is always in communication with the drain 175.
  • the closing member 162 includes a plate rotating about a horizontal axis. In the position as shown in the figure, the closing member 162 is inclined to prevent water from flowing through the conduit 160 towards the drain 175. In this condition, water may be collected in the container 132 to reach the level defined by the opening 163.
  • the valve is opened and all the water above the opening 164 is discharged through the drain 175 for abruptly flushing the filter.
  • Figure 4 shows the maximum amount Q of water that may be drained by opening the closing member 162 when the container has reached its maximum capacity defined by the overflow 161.
  • the closing member may be driven manually, using suitable control members (not shown) that the user can access from outside the machine.
  • Figure 5 shows a third alternative embodiment of the condensed water collection container 232.
  • the other parts of the laundry dryer machine are intended to be unchanged from the previous embodiments.
  • the container 232 comprises a plurality of drains 275 formed on the bottom wall of the container 232, at a conduit 276 that, in use, extends horizontally along the bottom wall of the container 232.
  • the means for feeding water to the drain comprise a conduit which in turn comprises a first stationary part 280 and a second movable part 281 which moves relative to the first.
  • the movable part 281 can slide vertically within the stationary part 280 while maintaining a hydraulic seal between the two parts.
  • the stationary part 280 is connected to the conduit 276.
  • the movable part 281 has a top opening 282 that defines the maximum water level in the container 232.
  • the control member 262, preferably a rod projecting out of the top of the container 232, is fixed to the movable part 281.
  • the level of the opening 282 may be changed, i.e. moved to the position designated by 282a, in which the movable part 281 is caused to slide downwards in the stationary part 280 of the conduit (position 281a).
  • the water above the opening 282a is discharged through the conduit 280 and the drain 275, to wash the filter 26.
  • the rod 262 may be manually driven and be possibly connected to control members (not shown) accessible to the user.
  • Q designates the level of water that is discharged when the movable part of the conduit is moved from the position 281 to the position 281a.
  • Figure 6 shows an alternative embodiment 326 of the drying air filter at the exit of the drum 13, and its housing within the frame of the machine.
  • the filter 326 has a greater thickness and has a first filtering mesh 393 and a second filtering mesh 394 finer than the first.
  • the filter 326 has a bottom door 392 that can be opened to ease cleaning of the filter.
  • the filter housing is widened between the two walls 390 and 391 of the machine framework.
  • the wall 391 is formed with a specially conceived concavity, for receiving the filter of larger size.
  • condensed water drainage may be controlled by the control means to occur at the end of the drying cycle, so that condensed water may release its heat to the drying cavity 41, for a long time during normal operation of the machine.
  • the container 32, 132, 232 is preferably formed of transparent materials, so that the user can check the load and the container filling state.
  • a laundry drying machine which can easily and quickly maintain the drying air filter in a satisfactorily clean state, without requiring any laborious cleaning procedure with the machine is open.
  • the machine has a simple and inexpensive construction, as it utilizes the condensed water collected in the container to wash the filter, without requiring any complex washing system.
  • the machine of the invention also allows quick and easy washing of the condenser located downstream from the air filter.

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

Claims (14)

  1. Wäschetrocknungsmaschine, aufweisend eine Trommel (13) mit einem Hohlraum (41) zur Aufnahme der zu trocknenden Wäsche, eine Heizeinrichtung (14) zum Erwärmen von Trockenluft, einen Kondensator (15) zum Entfernen von Feuchtigkeit aus der Trockenluft und eine Fördereinrichtung (16) zum sukzessiven Zirkulieren der Trockenluft durch die Trommel (13), den Kondensator (15) und die Heizeinrichtung (14), wobei die Maschine weiter aufweist einen Sammelbehälter (32) zum Sammeln des im Kondensator (15) kondensierten Wassers und ein Trockenluftfilter (26), wobei der Sammelbehälter (32) wenigstens einen Abfluss (75, 175, 275) zum Ablaufen des im Sammelbehälter (32) enthaltenen Wassers zum Filter (26) aufweist, dadurch gekennzeichnet, dass wenigstens in einem Betriebszustand der Sammelbehälter (32) oberhalb des Filters (26) platziert ist.
  2. Maschine nach Anspruch 1, dadurch gekennzeichnet, dass sie eine steuerbare Einrichtung (73, 162, 262, 282) zum Zuführen eines Volumens von im Sammelbehälter (32) schon gesammeltem Wasser zum Abfluss (75, 175, 275) aufweist, wobei die steuerbare Einrichtung (73, 162, 262, 282) geeignet ist zum Absenken des Wasserpegels im Sammelbehälter (32) unter einen maximalen Pegel, der vom Wasser im Sammelbehälter (32, 132) erreicht werden kann.
  3. Maschine nach Anspruch 2, dadurch gekennzeichnet, dass die Einrichtung zum Zuführen eines Wasservolumens zum Abfluss ein dem Abfluss (75, 175) zugeordnetes Ventil (73, 162) aufweist, das zum Steuern der Wasserentleerung geöffnet werden kann.
  4. Maschine nach Anspruch 3, dadurch gekennzeichnet, dass das Ventil (162) zwischen dem Abfluss (175) und einer Leitung (160) angeordnet ist, die sich in den Sammelbehälter (32, 132) öffnet und bei einem Pegel niedriger als der maximale Wasserpegel im Sammelbehälter (32, 132) lokalisiert ist.
  5. Maschine nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass das Ventil (73) durch eine Maschinensteuereinrichtung gesteuert wird.
  6. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Sammelbehälter (32, 132) eine Überlaufleitung (72, 161) aufweist, die das innere Volumen des Sammelbehälters (32, 132) in Kommunikation mit dem Abfluss (75, 175) zum Definieren des maximalen Wasserpegels im Sammelbehälter (32, 132) setzt.
  7. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kondensator (15) bei einem Pegel unterhalb des Filters (26) platziert ist, so dass das durch den Abfluss (75) abgeflossene Wasser durch Gravitation auch durch den Kondensator (15) fließen kann.
  8. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Sammeltank (30) für gerade kondensiertes Wasser stromabwärts des Kondensators (15) platziert ist, wobei eine Pumpe (31) zum Zuführen des Wassers vom Sammeltank (30) zum Sammelbehälter (32) bereitgestellt ist.
  9. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in wenigstens einem Trocknungsbetriebszustand der Sammelbehälter (32) an einer Tür (39) befestigt ist, die geeignet ist zum Schließen und Öffnen eines Zugangs zum Hohlraum (41) der Trommel (13).
  10. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Auslassdurchgang (51) zum Auslassen von Trockenluft aus der Trommel (13) direkt unterhalb des Sammelbehälters (32) platziert ist.
  11. Maschine nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Einrichtung zum Zuführen eines Wasservolumens zum Abfluss (275) eine Leitung aufweist, die das Innere des Sammelbehälters (232) in Kommunikation mit dem Abfluss (275) setzt, wobei die Leitung gebildet ist aus einem mit dem Abfluss (275) verbundenen ersten stationären Teil (280) und einem zweiten beweglichen Teil (281), der sich relativ zum ersten stationären Teil (280) bewegt und der eine den maximalen Wasserpegel im Sammelbehälter (232) definierende Öffnung (282) trägt.
  12. Maschine nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Einrichtung zum Zuführen des Volumens von Wasser zum Abfluss (275) derart ist, dass nach Abfluss eines Wasservolumens von wenigstens einem Drittel der Gesamtkapazität des Sammelbehälters (132, 232) in diesem Sammelbehälter (132, 232) belassen wird.
  13. Maschine nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass das Wasservolumen, das durch die Einrichtung zum Zuführen eines Wasservolumens abgelassen werden kann, wenigstens ein Sechstel des Gesamtvolumens des Sammelbehälters (132, 232) ist.
  14. Maschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Trockenluftfilter (26) in einer solchen Position lokalisiert ist, dass es Luft, die aus der Trommel (13) austritt, filtern kann.
EP09425414A 2009-10-20 2009-10-20 Wäschetrocknungsmaschine mit einem System zur Waschung des Trockenluftfilters dieser Maschine Active EP2314759B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT09425414T ATE547554T1 (de) 2009-10-20 2009-10-20 Wäschetrocknungsmaschine mit einem system zur waschung des trockenluftfilters dieser maschine
EP09425414A EP2314759B1 (de) 2009-10-20 2009-10-20 Wäschetrocknungsmaschine mit einem System zur Waschung des Trockenluftfilters dieser Maschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09425414A EP2314759B1 (de) 2009-10-20 2009-10-20 Wäschetrocknungsmaschine mit einem System zur Waschung des Trockenluftfilters dieser Maschine

Publications (2)

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EP2314759A1 EP2314759A1 (de) 2011-04-27
EP2314759B1 true EP2314759B1 (de) 2012-02-29

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AT (1) ATE547554T1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2527527B1 (de) * 2011-05-27 2017-07-12 Electrolux Home Products Corporation N.V. Wäschetrockner mit Drehtrommel
SE537671C2 (sv) 2011-08-15 2015-09-29 Asko Cylinda Ab Klädestorktumlare med mekanism för luddfilterrengöring
EP2610399B1 (de) * 2011-12-28 2014-08-06 Electrolux Home Products Corporation N.V. Wäschetrockner-Haushaltsgerät mit Flüssigkeitsbehälter
EP2938776B1 (de) * 2012-12-28 2017-10-11 Arçelik Anonim Sirketi Wäschetrockner umfassend einen filter
EP3323934A1 (de) * 2016-11-22 2018-05-23 Whirlpool Corporation Behälter mit verschüttungsschutzvorrichtung zum auffangen von kondensiertem wasser in einem wäschetrockner und mit diesem behälter mit verschüttungsschutzvorrichtung ausgestatteter wäschetrockner
KR20200137505A (ko) * 2019-05-30 2020-12-09 엘지전자 주식회사 의류 처리장치
TR202019167A2 (tr) * 2020-11-27 2022-06-21 Vestel Beyaz Esya San Ve Tic A S Mikrofiber filtre tertibatı içeren bir çamaşır makinesi.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1284443B1 (it) * 1996-06-26 1998-05-21 Candy Spa Macchina lavatrice di tipo domestico con circuito chiuso di asciugatura, condensazione ad aria del vapore e filtro autopulente
DE102007049061A1 (de) * 2007-10-12 2009-04-16 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und Vorrichtung zum Reinigen eines Bauteiles, insbesondere eines Verdampfers einer Kondensatoreinrichtung sowie Wasch- oder Wäschetrockner mit einer solchen Vorrichtung
DE102007060851A1 (de) * 2007-12-18 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Hausgerät zur Pflege von Wäschestücken und Verfahren zum Entfernen von Flusen

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ATE547554T1 (de) 2012-03-15

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