EP2133459B1 - Wäschetrockner - Google Patents

Wäschetrockner Download PDF

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Publication number
EP2133459B1
EP2133459B1 EP08010696A EP08010696A EP2133459B1 EP 2133459 B1 EP2133459 B1 EP 2133459B1 EP 08010696 A EP08010696 A EP 08010696A EP 08010696 A EP08010696 A EP 08010696A EP 2133459 B1 EP2133459 B1 EP 2133459B1
Authority
EP
European Patent Office
Prior art keywords
drum
interior space
drying air
wall
laundry
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08010696A
Other languages
English (en)
French (fr)
Other versions
EP2133459A1 (de
Inventor
Ben Diego Dal
Massimo Castiglione
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to ES08010696T priority Critical patent/ES2353926T3/es
Priority to PL08010696T priority patent/PL2133459T3/pl
Priority to EP08010696A priority patent/EP2133459B1/de
Priority to AT08010696T priority patent/ATE483054T1/de
Priority to DE602008002826T priority patent/DE602008002826D1/de
Publication of EP2133459A1 publication Critical patent/EP2133459A1/de
Application granted granted Critical
Publication of EP2133459B1 publication Critical patent/EP2133459B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • 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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis

Definitions

  • the present invention relates to a laundry dryer according to the preamble of claim 1 and to a method according to the preamble of claim 10.
  • Laundry dryers are known in the current state of the art. They normally comprise an outer casing provided with a loading door, a rotating drum arranged in the interior space of said outer casing and receiving or holding the laundry to be dried, a drying air circuit adapted to cause heated drying air to be circulated through said rotating drum, heating means adapted to heat up the drying air, usually supplied by electrical or gas combustion energy, and a condenser adapted to remove moisture from the hot moisture-laden drying air exiting said rotating drum after having flown trough the laundry contained therein. Moreover, blowing means are provided in order to circulate the drying air through the drum and the drying air circuit.
  • the hot air is blown again through openings into the rotating drum, where it receives again moisture of the laundry received therein.
  • WO 89/09303 A1 describes a laundry dryer having a perforated rotating drum with perforation for entry of the drying air, wherein at the periphery of the drum next to the perforations fins are formed in order to increase the air flow from outside into the interior of the drum through the perforation. Therefore, a rotation of the drum by means of the fins induces an air flow through the drum from the outside into the drum through the perforation.
  • a tumble dryer comprising an outer casing which is substantially sealed, an air inlet and an air outlet, a clothes drum mounted within the casing for rotation about a horizontal axis, a motor mounted in the casing and a fan mounted on the motor shaft, the fan having a moulded rotor affording two integral sets of blades, one set of blades being arranged to pressurise the casing by causing a flow of air via the inlet into the casing through the drum and from the casing via the outlet, and the other set of blades being arranged to induce a flow of cooling air around and/or through the motor.
  • the present invention provides a laundry (or: fabrics) dryer comprising a casing (or: housing, cabinet) and a rotatable or rotating laundry drum arranged (or: mounted) in the interior space of said casing.
  • the drum has a drum interior space for receiving or holding the laundry to be dried.
  • the drum interior space is enclosed (or: surrounded, delimited) by a drum wall having a loading opening for loading and unloading the laundry and at least one drying air passing region with opening(s), in particular perforations, for passing drying air into the drum interior space or out of the drum interior space, the direction of the drying air depending on the selected over-all direction of the drying air stream through the drum interior space).
  • the rotatable or rotating drum is provided with ventilation elements (or: venting elements, forced-convection elements) at the outside of the drum wall (or in other words: at the side of the drum wall facing away from the drum interior space).
  • ventilation elements are arranged in a continuous ventilation region of the drum wall (or: a closed region of the drum wall, a region of the drum wall which has no openings or perforations) spaced apart (or: arranged at a distance) from each drying air passing region.
  • the ventilation elements are configured and/or arranged to generate, during rotation of the drum, a cooling air stream in an intermediate interior space of the interior space of the casing lying outside of the outside wall of the drum and/or being separated from the drum interior space by the drum wall
  • the ventilation elements during rotational operation of the drum, generate a cooling air stream (or: flow) in an interior space of the casing lying outside of the drum wall or in between the drum wall and the casing.
  • the continuous or closed drum wall in the ventilation region in the vicinity of the ventilation elements serves as an air guiding wall preventing the ventilated air from entering or flowing into the drum interior.
  • the method for cooling an interior space of a casing of a laundry dryer according to the present invention comprises the steps of
  • the invention is based on the idea that in order to reduce the temperature inside the casing of the laundry dryer during its operation ventilation means or ventilation are provided utilizing the rotation of the rotating drum for creating or generating a cooling air stream within the casing and outside of the drum. Accordingly, the temperature inside the laundry dryer can be lowered in such a manner, that components may be used, which need not to be specified for high levels of temperatures as requested in prior art technology.
  • such electric and/or electronic components are arranged within the intermediate interior space and/or within a region adjacent or connected to the intermediate interior space, in particular at an operating panel.
  • the ventilation elements during rotation of the drum, generate a cooling air stream or flow in the interior space of the casing outside of the drum wall (or: intermediate interior space), the continuous drum wall in the ventilation region preventing the cooling air ventilated by the ventilation elements from entering the drum interior space and in particular serving as air guiding surface.
  • the cooling air ventilation or stream generated by means of the ventilation elements rotating with the drum is preferably basically independent from the drying air circulation through the drum or constitutes a separate air convection system.
  • the cooling air stream does not or only to a negligible or minor part flow through the drum interior and thus does not influence the drying air stream.
  • the ventilation elements are formed by appendixes (or: protrusions, juts) arranged at the outside of the drum wall and protruding outwardly from the drum wall or protruding into the interior space of the casing lying outside of the drum wall (intermediate interior space).
  • the appendixes are in particular formed as fins, flaps, blades, paddles, vanes or ribs.
  • the appendixes can be formed integrally, i.e. in a single-piece construction, with the drum wall or the outer surface of the rotating drum or can be formed as separate elements mounted at the drum wall.
  • the laundry dryer may usually also comprises a drying air circuit adapted to cause heated drying air to be circulated through said rotating drum or its interior space and heating means adapted to heat up the drying air.
  • a condenser is comprised which is adapted to remove moisture from the hot moisture-laden drying air exiting said rotating drum after having flown through the laundry contained therein.
  • the laundry dryer is provided with a loading door mounted at the casing for closing and opening the loading opening of the drum, wherein the loading door in particular serves as an air channel for the drying air flowing in or out of the drum interior space and in particular contains air passing openings towards the loading opening and preferably also a filter for filtering the drying air and/or wherein in particular the loading door is also part of the drying air circuit.
  • the drum or the drum wall may be made of plastics material. Furthermore, at least one drying air passing region and its opening or openings for passing drying air are arranged in a rear drum wall or rear region of the drum wall. Also, an opening or several openings can be formed in a stationary rear bulkhead of the drum for passing drying air.
  • FIG 1 to 3 are perspective views of a laundry dryer 10 according to a first embodiment of the present invention.
  • the laundry dryer 10 comprises an outer casing 12 (partly not illustrated in order to show the inside of the laundry dryer 10) having two side walls 12A and 12B, a rear wall 12C, a bottom structure 12D and a front part 12E. All these walls and parts 12A to 12E jointly enclose a casing interior space 13 within the casing 12.
  • the front part 12E is provided with a loading door 14 and an operating panel 29.
  • a rotating drum 16 is rotatably or rotatingly mounted at the casing 12 within the casing interior space 13.
  • the rotating drum 16 has a drum interior space 15 to put in laundry to be dried and a drum wall 17 enclosing the drum interior space 15.
  • the drum 16 preferably with the edge of the drum wall 17, rotates slidingly in or on a stationary rear bulkhead 22.
  • a loading opening 25 is also provided for putting in or out the laundry.
  • the intermediate interior space of the whole casing interior space 13 which is arranged between the drum wall 17 on one side and the casing 12 and its walls and parts 12A to 12E on the other side is designated with 28.
  • the laundry dryer 10 is further provided with a drying air circuit for circulating a flow of heated drying air DA indicated by arrows through the drum interior space 15 of the rotating drum 16, heating means (not shown) for heating up said drying air DA, a condenser 18, which removes moisture from the hot moisture-laden drying air DA exiting the rotating drum 16 after having flown through the laundry contained therein, and blowing means in order to circulate the drying air DA through the rotating drum 16 and the drying air circuit.
  • a drying air circuit for circulating a flow of heated drying air DA indicated by arrows through the drum interior space 15 of the rotating drum 16
  • heating means not shown
  • a condenser 18 which removes moisture from the hot moisture-laden drying air DA exiting the rotating drum 16 after having flown through the laundry contained therein
  • blowing means in order to circulate the drying air DA through the rotating drum 16 and the drying air circuit.
  • the drying air DA is circulated through the drying air circuit by the blowing means. Accordingly, the drying air DA, which was heated by the heating means, enters the drum interior space 15 of the rotating drum 16 through openings 20 formed in the stationary rear bulkhead 22 of the drum 16 and then through the rear region of the drum wall 21, which is open to the back, in one embodiment or through openings or perforations in a rear wall of the drum in another embodiment.
  • the heated drying air DA receives moisture from the laundry contained therein. Thereafter, the hot moisture-laden drying air DA leaves the rotating drum 16 through its loading opening 25 and the front bulkhead 24, passes through a lint-filter (not shown) in the loading door 14 and enters the condenser 18.
  • the hot moisture-laden drying air undergoes a heat-exchange process, in which heat is exchanged with a means lying at a lower temperature (for example an air heat exchanger or an evaporator of a heat pump system), to the purpose of removing from the air the moisture it took away from the laundry in the drum 16.
  • the drying air DA which was cooled down and dehydrated within the condenser 18, is heated up again passing through the heating means, whereupon it anew enters the drum 16 through the openings 20 and the rear region of the drum wall 17.
  • electric and/or electronic components 31 are arranged within the intermediate interior space 28 and the casing interior space 13 or in regions of the laundry dryer adjacent to these spaces 28 or 13 electric and/or electronic components 31 are arranged.
  • electric and electronic components 31 can be positioned behind the operating panel 29, including e.g. an electronic main board as well as relays for controlling of the motor and the heater.
  • these electric and/or electronic components 31 are sensitive for high temperatures.
  • the components 31 include electrically conductive materials which are usually also good thermal conductors heat transfer rate is high.
  • an air ventilation of the intermediate interior space 28 is provided for cooling and keeping the temperatures at the electric and/or electronic components 31 low or below a certain threshold.
  • a plurality of ventilation elements 26 arranged in a ring configuration in a first ventilation region 36 and a plurality of further ventilation elements 27 arranged in another ring configuration in a second ventilation region 37 are provided at the outer surface of the drum wall 17 of the drum 16 in such a manner, that they protrude outwards from the outer periphery of the drum 16.
  • ventilation elements 26 and 27 are arranged at the side wall 19 or shell of the drum wall 17 in the front region although ventilation elements could also be provided at the rear region of the drum wall 21 and/or in the central region of the side wall 19 of the drum wall 17.
  • the ventilation elements 26 and 27 may be formed integrally with the drum wall 17 or, alternatively, be fixed as separate elements to the periphery of the drum 16 at the drum wall 17.
  • the ventilation elements 26 and 27 are formed as fins or blades or ribs or similar shapes suitable for air convection or blowing and protrude outwardly in the radial direction or tilted or curved in a direction forming an angle with the radial direction.
  • the ventilation elements 26 and the ventilation elements 27 respectively are arranged one behind the other along the circumference of the drum wall 17 in the rotating direction about the rotational axis of the drum 16.
  • the ventilation elements 26 and 27 swirl or force the air surrounding the outer periphery of the drum 16 in order to create an airflow of cooling air CA within the intermediate interior space 28 in particular in the front region, which leads to a reduction of the temperature within the outer casing 12 of the laundry dryer.
  • each ventilation region 36 and 37 the drum wall 17 or 19 is completely closed or formed as a continuous wall or surface so that the ventilated cooling air CA does not enter the drum interior space 15 but flows only through the intermediate interior space 28 within the casing 12. Due to this cooling by the cooling air flow CA a lower temperature is achieved and electronic or electric components, which are contained inside the casing 12, in particular the components 31 in the front, need not to be specified for high levels of temperature. Accordingly, the costs for such components may be lowered.
  • the ventilation of the cooling air CA and cooling is achieved by the rotation of the drum itself thereby rotating also the ventilation elements 26 and 27 without the necessity to provide additional drives and motors for the cooling ventilation.
  • FIG 4 illustrates a second embodiment of a laundry dryer 30 according to the present invention.
  • the configuration of the laundry dryer 30 is almost the same as the one of the laundry dryer 10 according to the first embodiment of the present invention explained above.
  • ventilation elements 32 are formed on the outer surface of the drum 16 in such a manner, that they extend almost over the whole width of the drum 16 or, in other words, extend over the whole axial length of the side wall 19 as seen parallel to the rotational axis of the drum 16. Accordingly, the ventilation function created by these ventilation elements 32 is more effective or covers more space compared with the one realized by the ventilation elements 26 and 27 of the first embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Woven Fabrics (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Polarising Elements (AREA)
  • Drying Of Solid Materials (AREA)

Claims (11)

  1. Wäschetrockner (10; 30), welcher folgendes aufweist:
    ein Gehäuse (12) und
    eine drehbare bzw. umlaufende Trommel (16), die in einem Innenraum des Gehäuses (12) angeordnet ist, wobei die Trommel einen Trommelinnenraum zur Aufnahme der zu trocknenden Wäsche besitzt,
    wobei der Trommelinnenraum von einer Trommelwandung (17) umschlossen ist, die eine Ladeöffnung zum Einladen und Ausladen der Wäsche aufweist, sowie mindestens einen Bereich zum Durchleiten von Trockenluft mit mindestens einer Öffnung zum Einleiten von Trockenluft in den Trommelinnenraum bzw. zum Ausleiten von Trockenluft aus dem Trommelinnenraum,
    bei welchem Belüftungselemente vorgesehen sind,
    dadurch gekennzeichnet, dass
    die Trommel (16) mit den Belüftungselementen (26; 32) auf der Außenseite der Trommelwandung (17, 19) versehen ist,
    die Belüftungselemente dabei so ausgelegt sind, dass während der Drehbewegung der Trommel in einem Zwischeninnenraum (28) des Innenraums des Gehäuses, der außerhalb der Außenwandung der Trommel liegt und/oder durch die Trommelwandung (17, 10) vom Trommelinnenraum getrennt ist, ein Kühlluftstrom (CA) erzeugt wird, und/oder dass die Belüftungselemente (26, 27, 32) dabei in einem durchgehenden Belüftungsbereich (36, 37) der Trommelwandung angeordnet sind,
    der von jedem Bereich zum Durchleiten von Trockenluft getrennt ist.
  2. Wäschetrockner (10; 30) nach Anspruch 1, bei welchem die Belüftungselemente von Ansätzen (26, 27, 32) gebildet sind, die auf der Außenseite der Trommelwandung (16) angeordnet sind und sich von der Trommelwandung nach außen oder in den Innenraum des Gehäuses vorstehen, der außerhalb der Trommelwandung liegt.
  3. Wäschetrockner (10; 30) nach Anspruch 2, bei welchem die Ansätze als Stege, Klappen, Lamellen, Radschaufeln, Flügel oder Rippen ausgebildet sind.
  4. Wäschetrockner (10; 30) nach Anspruch 2 oder 3, bei welchem die Ansätze (26; 32) einstückig mit der Außenfläche der Trommelwandung (16) der Trommel (16) oder als separate Elemente ausgebildet sind, die auf der Trommelwandung (17) angebracht sind.
  5. Wäschetrockner (10; 30) nach einem der vorhergehenden Ansprüche, bei welchem die Trommel (16) bzw. die Trommelwandung aus Kunststoff hergestellt ist und/oder bei welchem der mindestens eine Bereich zum Durchleiten von Trockenluft und dessen mindestens eine Öffnung zum Einleiten von Trockenluft in den Trommelinnenraum bzw. zum Ausleiten der Trockenluft aus dem Trommelinnenraum in einer rückwärtigen Trommelwandung oder einem rückwärtigen Bereich der Trommelwandung angeordnet sind, und/oder bei welchem mindestens eine Öffnung (230) in einer ortsfesten rückwärtigen Trennwand (22) der Trommel (16) zum Durchleiten von Trockenluft ausgebildet ist.
  6. Wäschetrockner (10; 30) nach einem der vorhergehenden Ansprüche, bei welchem innerhalb des Zwischeninnenraums (28) und/oder innerhalb eines dem Zwischeninnenraum (28) benachbarten bzw. mit diesem verbundenen Bereichs elektrische und/oder elektronische Bauelemente (31) insbesondere an einem Bedienfeld (29) angeordnet sind.
  7. Wäschetrockner (10; 30) nach einem der vorhergehenden Ansprüche , welcher einen Trockenluft-Kreislauf aufweist, welcher so ausgebildet ist, dass er den Umlauf erwärmter Trockenluft (DA) durch die umlaufende Trommel (16) hindurch herbeiführt, sowie eine Heizeinrichtung, die zum Erwärmen der Trockenluft ausgelegt ist.
  8. Wäschetrockner (10; 30) nach Anspruch 7, welcher des Weiteren einen Kondensator (18) aufweist, der zum Entfernen von Feuchtigkeit aus der mit heißer Feuchtigkeit beladenen Trockenluft ausgelegt ist, die aus der umlaufenden Trommel (16) austritt, nachdem sie durch die darin enthaltene Wäsche geströmt ist.
  9. Wäschetrockner (10; 30) nach einem der vorhergehenden Ansprüche, der des Weiteren mit einer Beschickungstür (14) versehen ist, die an dem Gehäuse zum Schließen und Öffnen der Ladeöffnung der Trommel angebracht ist, und bei welchem die Beschickungstür als Luftströmungskanal für die Trockenluft dient, die in den Trommelinnenraum oder aus diesem heraus strömt und/oder Luftdurchlassöffnungen zur Beschickungsöffnung hin aufweist und/oder einen Filter zum Filtern der Trockenluft enthält, und/oder bei welchem die Beschickungstür einen Teil des Trockenluft-Kreislaufs darstellt.
  10. Verfahren zum Kühlen von mindestens einem Teil eines Innenraums eines Gehäuses eines Wäschetrockners, welches die Schritte umfasst, bei denen eine Trommel des Wäschetrockners zum Aufnehmen der zu trocknenden Wäsche gedreht wird, und mittels Belüftungselementen ein Kühlluftstrom erzeugt wird,
    gekennzeichnet durch
    die Erzeugung eines Kühlluftstroms in einem Zwischeninnenraum (28), der einen Teil des Innenraums (13) des Gehäuses darstellt, welcher außerhalb einer Außenwandung der Trommel liegt, mittels Belüftungselementen (26, 27, 32), die an der Außenwandung der Trommel vorgesehen sind und sich mit der Trommel drehen.
  11. Verfahren nach Anspruch 10, bei welchem zum Trocknen der Wäsche ein Strom von Trockenluft zwangsweise durch den Trommelinnenraum geleitet wird, wobei der Trockenluftstrom ausgeprägt und von dem Kühlluftstrom getrennt ist und/oder unabhängig von dem Kühlluftstrom fließt und/oder von dem Kühlluftstrom nicht beeinflusst wird.
EP08010696A 2008-06-12 2008-06-12 Wäschetrockner Not-in-force EP2133459B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES08010696T ES2353926T3 (es) 2008-06-12 2008-06-12 Secadora de ropa.
PL08010696T PL2133459T3 (pl) 2008-06-12 2008-06-12 Suszarka do prania
EP08010696A EP2133459B1 (de) 2008-06-12 2008-06-12 Wäschetrockner
AT08010696T ATE483054T1 (de) 2008-06-12 2008-06-12 Wäschetrockner
DE602008002826T DE602008002826D1 (de) 2008-06-12 2008-06-12 Wäschetrockner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08010696A EP2133459B1 (de) 2008-06-12 2008-06-12 Wäschetrockner

Publications (2)

Publication Number Publication Date
EP2133459A1 EP2133459A1 (de) 2009-12-16
EP2133459B1 true EP2133459B1 (de) 2010-09-29

Family

ID=39884105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08010696A Not-in-force EP2133459B1 (de) 2008-06-12 2008-06-12 Wäschetrockner

Country Status (5)

Country Link
EP (1) EP2133459B1 (de)
AT (1) ATE483054T1 (de)
DE (1) DE602008002826D1 (de)
ES (1) ES2353926T3 (de)
PL (1) PL2133459T3 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB787942A (en) * 1956-02-28 1957-12-18 Franz Pluemer Improvements in drying apparatus
DE1804153A1 (de) * 1968-10-19 1970-04-30 Passat Maschb Gmbh Trommeltrockner fuer Waesche
GB2063441B (en) 1979-10-01 1983-11-23 Hoover Ltd Tumbler dryer
WO1989009303A1 (en) 1988-03-22 1989-10-05 Hans Lenz Drying apparatus
KR100531834B1 (ko) * 2004-04-06 2005-11-30 엘지전자 주식회사 흡입가이드를 구비한 배기식 의류 건조기

Also Published As

Publication number Publication date
ATE483054T1 (de) 2010-10-15
ES2353926T3 (es) 2011-03-08
EP2133459A1 (de) 2009-12-16
PL2133459T3 (pl) 2011-04-29
DE602008002826D1 (de) 2010-11-11

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