EP1837434B1 - Wäschetrommeltrockner - Google Patents

Wäschetrommeltrockner Download PDF

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Publication number
EP1837434B1
EP1837434B1 EP06111422A EP06111422A EP1837434B1 EP 1837434 B1 EP1837434 B1 EP 1837434B1 EP 06111422 A EP06111422 A EP 06111422A EP 06111422 A EP06111422 A EP 06111422A EP 1837434 B1 EP1837434 B1 EP 1837434B1
Authority
EP
European Patent Office
Prior art keywords
drum
door
air
drying air
dryer according
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
EP06111422A
Other languages
English (en)
French (fr)
Other versions
EP1837434A1 (de
Inventor
Elisabetta Bari
Maurizio Del Pos
Kevin Breese
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 EP06111422A priority Critical patent/EP1837434B1/de
Priority to ES06111422T priority patent/ES2318668T3/es
Priority to DE602006005039T priority patent/DE602006005039D1/de
Priority to PL06111422T priority patent/PL1837434T3/pl
Priority to AT06111422T priority patent/ATE422007T1/de
Publication of EP1837434A1 publication Critical patent/EP1837434A1/de
Application granted granted Critical
Publication of EP1837434B1 publication Critical patent/EP1837434B1/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 refers to an improved kind of clothes tumble dryer.
  • the most commonly found dryers are generally comprised of an outer casing provided with a loading door, a drying air circuit adapted to cause heated air to be circulated through a perforated rotating drum holding the laundry to be dried, heating means adapted to heat up said drying air, and a condenser adapted to remove moisture from the hot moisture-laden drying air exiting said drum after having flown through the laundry contained therein.
  • the dryer further comprises blower means to circulate the drying air through the drum and the drying-air circuit.
  • the drying-air circuit is so arranged as to be able to cause the hot moisture-laden air to exit the drum and to deliver the same air into and through the condenser, where the air undergoes a heat-exchange process, in which heat is exchanged with a means lying at a lower temperature, to the purpose of removing from the air the moisture it took away from the clothes in the drum. Thereupon, the air is then heated up again prior to its being blown again into the drum.
  • One of the most intensively pursued design targets in the field of laundry drying machines is to increasingly simplify the construction of the drying-air circuit, in view of being able to reduce the overall dimensions, and related space requirements, of the same circuit and, at the same time, improve the drying performance capabilities of the machine.
  • US 3,099,542 discloses a clothes tumble dryer provided with a loading door which forms an air passage establishing fluid communication with the drum holding the laundry for conveving the hot moisture-laden drying air exiting the drum towards and into a condenser means.
  • a specific cooling air system is provided at this scone.
  • US 2004/123489 A1 discloses a fabric article treating device comprising temperature sensitive components which are thermally protected by means of ceramic foams, like suitable silica aerogel.
  • Still another purpose of the present invention is to reduce the heat loss, i.e. the amount of heat dissipated by the drying air exiting the drum, when it is conveyed into the drying circuit.
  • the clothes tumble dryer according to the present invention - as generally indicated at 1 in said Figures - comprises an outer casing 2 provided with a loading door 3, a drying air circuit adapted to cause a flow of heated air to be circulated through a perforated rotating drum 4 holding the laundry to be dried, heating means adapted to heat up said drying air, condenser means adapted to remove moisture from the hot moisture-laden air exiting the drum after having flown through the laundry contained in the drum.
  • the door 3 forms an air passage 5 that, when the door 3 is closed, fluidly communicates with said drum 4 so as to convey the hot and moisture-laden drying air exiting the drum 4 towards the condenser means; it further forms one or more cavities 6 to encapsulate, i.e. enclose an aerogel layer 7 therein, so as to thermally insulate from the outside the door 3 forming said air passage 5.
  • the dryer comprises a closed-loop drying-air circuit, through which the hot and moisture-laden drying air is conveyed, when leaving the perforated rotating drum, and the dehydrated drying air from the condenser is then delivered back into the drum, upon having duly heated up again, so as to remove additional moisture from the clothes being tumbled in the drum.
  • the dryer further comprises an open-loop cooling-air circuit adapted to cause a stream of cooling air taken in from outside to circulate through and over the condenser to cool it down before being eventually exhausted into the outside atmosphere again.
  • the tumble dryer comprises blower means adapted to cause the drying air to circulate inside the drum and through the closed-loop drying-air circuit, as well as to cause the cooling air to circulate through the open-loop cooling-air circuit.
  • the door 3 comprises a door frame 8 that, along side edges thereof, is provided with recesses 9 integrally forming corresponding rotating pins adapted to engage corresponding guides provided in the outer casing of the dryer. These pins are adapted to rotate inside said guides so as to enable the door 3 to rotate relative to the outer casing 2 and, therefore, access to be gained into the drum 4 to load and unload clothes in and from the same drum.
  • the door frame 8 has an inner side 10 that faces the drum 4 when the door 3 is closed, and an outer side 11 facing the outside of the machine.
  • the inner side 10 of the door frame 8 forms the air passage 5 adapted to convey the hot moisture-laden drying air exiting the drum 4 towards the condenser.
  • the air passage 5 is formed by the inner side 10 of the door frame 8 by means of a collecting or baffle member 12 projecting from the inner side 10 of the door frame 8 towards the drum 4 to receive and collect the air exiting the same drum.
  • the collecting member 12 is provided with an inflow portion 13 provided and arranged in such manner as to come to lie in a position close to an aperture of the drum 4 or to be received into said aperture when the door 3 is closed.
  • the inflow portion 13 comprises a surface provided with a plurality of perforations, through which the drying air is able to flow from the drum 4 into said air passage 5.
  • a removable filter (not shown) is arranged inside the baffle member 12 for retaining fluff being carried by the drying air flowing therethrough. The filter is adapted to be cleaned after each drying cycle by the user.
  • the above-mentioned collecting member 12 defines an abutment frame 14 that extends around the inflow portion 13 and is peripherally provided with a sealing member 15.
  • said abutment frame 14 is adapted to rest against an undercut provided on the outer casing 2 and correspondingly shaped so as to be able to receive the abutment frame 14 and enable the perforations of the inflow portion 13 of the collecting member 12 to come to lie inside the peripheral rim of the aperture of the drum 4.
  • the sealing member 15 is adapted to provide an air-tight coupling of the peripheral edge of the frame 14 with the receiving undercut in the outer casing, when the door 3 is closed, so as to force the drying air exiting the drum 4 to solely flow through the perforations of the inflow portion 13 of the collecting member 12 and, as a result, to flow into the air passage 5 of the door 3.
  • the drying air exits the drum 4 flows through the perforations in the inflow portion 13 of the collecting member 12 entering the air passage 5, and is deflected by the inner side 10 of the door frame 8 so as to be directed towards an outflow aperture provided in the air passage 5 of the door 3, through which said air passage 5 fluidly communicates with the condenser.
  • the inner side 10 of the door frame 8 therefore defines an airflow deflecting surface, over which the drying air flowing in from the drum 4 is adapted to stream to be deflected and conveyed towards the outflow aperture of the air passage 5, from which the air reaches then the condenser.
  • the outer side 11 of the door frame 8 forms a pluralities of cavities or compartments 6, which are separated from each other by partitions and are adapted to be filled with aerogel granules 7.
  • Aerogels have a very low density and an extremely low heat conductivity.
  • the term "gel” refers to a coherent, rigid, continuous three-dimensional network of colloidal particles. Gels are produced by the aggregation of colloidal particles (typically under acidic conditions when neutralizing salts are absent) to form a three-dimensional gel microstructure. When a gel is then dried (through the removal of liquid from the pores) with the use of means in which the coherent gel microstructure is preserved, as this for instance occurs in supercritical drying, a low-density "aerogel” is formed.
  • One suitable process for the production of aerogels is described in US 3,122,520 .
  • the aerogel granules may have any suitable diameter, preferably of approx. 5 to 10 mm.
  • any suitable aerogel granules can be used in the present invention and, in particular, the aerogels used are those based on metal oxides that are suitable for the sol-gel technique ( C.J. Brinker and G.W. Scherer, Sol-Gel Science 1990, Chapters 2 and 3 ), such as for instance Si or Al compounds, or those based on organic substances suitable for the sol-gel technique, such as melamine-formaldehyde condensates ( US Pat. No. 5,086,085 ) or resorcinol-formaldehyde condensates ( US Pat. No. 4,873,218 ). Mixtures of the above-mentioned materials may be used, as well. Preferably used are anyway aerogels containing Si compounds, such as in particular SiO 2 aerogels.
  • An outer panel 16 is adapted to be applied on to the door frame 8 so as to encapsulate, i.e. enclose the aerogel inside the same door 3.
  • the aerogel granules form a layer that thermally insulates the inner side of the door frame forming the air passage provided for the drying air exiting the drum to flow therethrough, thereby preventing the heat of the same air from dissipating outside the machine.
  • the external surface of the door acts, in fact, as a heat sink. The heat loss from the drying air due to convective heat exchange with the inner side of the door frame is drastically reduced, thereby improving the thermal efficiency of the drying cycle as a whole.
  • the dryer is therefore provided with a door that integrally forms a portion of the drying air circuit, thereby enabling the bulkiness of the same circuit and the space occupied by it inside the machine to be reduced and further enabling the pressure drop and the turbulence of the air flow to be reduced owing to the design of the air passage.
  • the door of the dryer forms a conveyance means that establishes an effective fluid communication between the drum and the condenser, thereby reducing flow resistance and pressure losses and maximizing the passage of the drying air from the drum into the circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Polarising Elements (AREA)
  • Woven Fabrics (AREA)
  • Drying Of Solid Materials (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (9)

  1. Wäschetrockner, umfassend ein Außengehäuse (2) mit einer Ladetür (3), einen Trockenluftkreislauf, der geeignet ist, das Zirkulieren erwärmter Luft durch eine die zu trocknende Wäsche enthaltende, perforierte rotierende Trommel (4) zu bewirken, Heizmittel, die geeignet sind, die Trockenluft zu erwärmen, ein Kondensatormittel, das geeignet ist, die Feuchtigkeit aus der heißen, aus der Trommel austretenden, feuchtigkeitsbeladenen Trockenluft zu entfernen, wobei die Tür (3), wenn sie geschlossen ist, einen Luftkanal (5) ausbildet, der eine Fluidkommunikation mit der Trommel (4) herstellt, um die heiße, aus der Trommel (4) austretende, feuchtigkeitsbeladene Trockenluft zu dem und in das Kondensatormittel zu befördern, dadurch gekennzeichnet, dass die Tür (3) ferner einen oder mehrere Hohlräume (6) ausbildet, die dazu dienen, eine Aerogelschicht (7) darin einzuschließen, um die Tür (3), die den Luftkanal (5) ausbildet, thermisch von der Außenseite zu isolieren.
  2. Wäschetrockner gemäß Anspruch 1, wobei die Tür (3) einen Türrahmen (8) umfasst, der eine Innenseite (10), die so angeordnet ist, dass sie dem Inneren der Trommel zugewandt ist, wenn die Tür (3) geschlossen ist, und eine dem Maschinenaußenbereich zugewandte Außenseite aufweist, wobei die Innenseite (10) des Türrahmens (8) den Luftkanal (5) bildet, der geeignet ist, die heiße, aus der Trommel (4) austretende, feuchtigkeitsbeladene Trockenluft zu dem und in das Kondensatormittel zu befördern.
  3. Wäschetrockner gemäß Anspruch 2, wobei der Luftkanal (5) durch eine Innenseite (10) des Türrahmens (8) und ein Luftsammlerelement (12) gebildet wird, das von der Innenseite (10) des Türrahmens (8) gegen die Trommel (4) hin vorragt, um die aus der Trommel ausströmende Luft aufzunehmen und zu sammeln.
  4. Wäschetrockner gemäß Anspruch 3, wobei das Luftsammlerelement (12) einen Zustromabschnitt (13) aufweist, der so angeordnet ist, dass er in der Nähe einer Öffnung der Trommel (4) zu liegen kommt, wenn die Tür (3) geschlossen ist.
  5. Wäschetrockner gemäß Anspruch 4, wobei der Zustromabschnitt (13) eine Oberfläche umfasst, die mit einer Mehrzahl von Perforationen versehen ist, durch die die Trockenluft von der Trommel (4) zu dem und in den Luftkanal (5) strömen kann und wobei der Zustromabschnitt (13) geeignet ist, als Flusenfilter zu fungieren, das dazu dient, Fussel zurück zu halten, die von der aus der Trommel austretenden Trockenluft mitgeführt werden.
  6. Wäschetrockner gemäß Anspruch 5, wobei das Luftsammlerelement (12) einen Anschlagrahmen (14) begrenzt, der sich rund um den Zustromabschnitt (13) erstreckt und am Außenrand mit einem Dichtungsmittel (15) versehen ist, wobei der Rahmen (14) geeignet ist, sich in Anschlag gegen einen entsprechend geformten Untergriff am Außengehäuse (2) zu bewegen, wenn die Tür (3) geschlossen wird, wobei das Dichtungsmittel (15) wiederum geeignet ist, eine luftdichte Verbindung zwischen dem Außenrand des Rahmens (14) und dem Untergriff des Außengehäuses (2) herzustellen, wenn die Tür (3) geschlossen ist, um die aus der Trommel (4) austretende Trockenluft so zu leiten, dass sie ausschließlich durch die Perforationen im Zustromabschnitt (13) des Luftsammlerelements (12) dringt und folglich in den Luftkanal (5) der Tür (3) strömt.
  7. Wäschetrockner gemäß Anspruch 6, wobei die Innenseite (10) des Türrahmens (8) eine Luftleitfläche begrenzt, auf die der von der Trommel (6) einströmende Trockenluftstrom strömen kann, um abgelenkt und zu einer Abstromöffnung im Luftkanal (5) befördert zu werden und in Fluidkommunikation mit dem Kondensator zu treten.
  8. Wäschetrockner gemäß Anspruch 7, wobei die Außenseite (11) des Türrahmens (8) eine Mehrzahl von Hohlräumen oder Fächern (6) ausbildet, die voneinander durch Trennwände getrennt sind, die geeignet sind, Aerogelkörner (7) zu enthalten.
  9. Wäschetrockner gemäß Anspruch 8, wobei am Türrahmen (8) ein Außenpanel (16) angebracht werden kann, um die Aerogelkörner (7) im Inneren der Tür (3) einschießen zu können.
EP06111422A 2006-03-21 2006-03-21 Wäschetrommeltrockner Not-in-force EP1837434B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP06111422A EP1837434B1 (de) 2006-03-21 2006-03-21 Wäschetrommeltrockner
ES06111422T ES2318668T3 (es) 2006-03-21 2006-03-21 Secadora de ropa por volteo.
DE602006005039T DE602006005039D1 (de) 2006-03-21 2006-03-21 Wäschetrommeltrockner
PL06111422T PL1837434T3 (pl) 2006-03-21 2006-03-21 Suszarka bębnowa
AT06111422T ATE422007T1 (de) 2006-03-21 2006-03-21 Wäschetrommeltrockner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06111422A EP1837434B1 (de) 2006-03-21 2006-03-21 Wäschetrommeltrockner

Publications (2)

Publication Number Publication Date
EP1837434A1 EP1837434A1 (de) 2007-09-26
EP1837434B1 true EP1837434B1 (de) 2009-01-28

Family

ID=36557703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06111422A Not-in-force EP1837434B1 (de) 2006-03-21 2006-03-21 Wäschetrommeltrockner

Country Status (5)

Country Link
EP (1) EP1837434B1 (de)
AT (1) ATE422007T1 (de)
DE (1) DE602006005039D1 (de)
ES (1) ES2318668T3 (de)
PL (1) PL1837434T3 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012212739A1 (de) 2012-07-19 2014-01-23 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrockner mit Lagerschild mit thermischer Isolierung sowie hierfür geeignetes Lagerschild
CN103590225B (zh) * 2013-11-27 2016-01-13 肖泽斌 一种节能干衣机
SI24927A (sl) * 2015-02-25 2016-08-31 GORENJE gospodinjski aprarati, d.d. Sušilnik perila s filtrom sušilnega zraka
CN105177914B (zh) * 2015-06-30 2017-12-26 无锡小天鹅股份有限公司 滚筒洗衣机
US10526745B2 (en) 2018-04-19 2020-01-07 Haier Us Appliance Solutions, Inc. Door for improved air flow in a dryer appliance
US11697901B2 (en) 2020-01-09 2023-07-11 Whirlpool Corporation Door assembly for a laundry treating appliance
KR20220126428A (ko) * 2021-03-09 2022-09-16 엘지전자 주식회사 의류처리장치
CN114263011A (zh) * 2021-11-29 2022-04-01 珠海格力电器股份有限公司 洗干一体机
CN115350656A (zh) * 2022-09-07 2022-11-18 天津科技大学 一种纤维素纳米纤丝凝胶的烘缸加热浓缩装置、方法和应用

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099542A (en) * 1960-04-25 1963-07-30 Gen Motors Corp Drying air heat control and moisture removal apparatus
US20040123489A1 (en) * 2002-04-22 2004-07-01 The Procter & Gamble Company Thermal protection of fabric article treating device

Also Published As

Publication number Publication date
ATE422007T1 (de) 2009-02-15
EP1837434A1 (de) 2007-09-26
PL1837434T3 (pl) 2009-07-31
ES2318668T3 (es) 2009-05-01
DE602006005039D1 (de) 2009-03-19

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