EP2230349B1 - Cartouche de filtrage pour séchoirs à linge domestiques et séchage à linge fourni avec cette cartouche de filtrage - Google Patents

Cartouche de filtrage pour séchoirs à linge domestiques et séchage à linge fourni avec cette cartouche de filtrage Download PDF

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Publication number
EP2230349B1
EP2230349B1 EP09004020.5A EP09004020A EP2230349B1 EP 2230349 B1 EP2230349 B1 EP 2230349B1 EP 09004020 A EP09004020 A EP 09004020A EP 2230349 B1 EP2230349 B1 EP 2230349B1
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EP
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Prior art keywords
airflow
filtering cartridge
air
laundry
supporting plate
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EP09004020.5A
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German (de)
English (en)
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EP2230349A1 (fr
Inventor
Riccardo Quaroni
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Electrolux Home Products Corp NV
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Electrolux Home Products Corp NV
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Priority to EP09004020.5A priority Critical patent/EP2230349B1/fr
Priority to RU2010110539/12A priority patent/RU2539402C2/ru
Publication of EP2230349A1 publication Critical patent/EP2230349A1/fr
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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

Definitions

  • the present invention relates to a filtering cartridge for home laundry driers.
  • the present invention relates to a filtering cartridge for rotary-drum home laundry driers with a heat-pump type closed-circuit, hot-air generator, to which the following description refers purely by way of example.
  • present rotary-drum home laundry driers generally comprise a substantially parallelepiped-shaped outer box casing; a cylindrical bell-shaped drum for housing the laundry to be dried, and which is housed in axially rotating manner inside the casing to rotate about its horizontally oriented longitudinal axis, directly facing a laundry loading/unloading opening formed in the front face of the casing; a door hinged to the front face of the casing to rotate to and from a closing position in which the door rests completely against the casing to close the opening in the front face of the casing and seal the revolving drum; and an electric motor assembly for rotating the drum about its longitudinal axis inside the casing.
  • Rotary-drum home laundry driers of the above type also comprise a closed-circuit, hot-air generator designed to circulate inside the revolving drum a stream of hot air with a low moisture content, and which flows through the revolving drum and over the laundry inside the drum to rapidly dry the laundry.
  • the closed-circuit, hot-air generator comprises an air recirculating conduit having its two ends connected to the revolving drum, on opposite sides of the latter; an electric centrifugal fan located along the recirculating conduit to produce, inside the latter, an airflow which flows through the revolving drum; and finally a heat-pump assembly having its two heat exchangers located one after the other, along the air recirculating conduit.
  • the first air/refrigerant heat exchanger of the heat-pump assembly provides for rapidly cooling the airflow arriving from the revolving drum to condense the surplus moisture in the airflow; whereas the second air/refrigerant heat exchanger of the heat-pump assembly provides for rapidly heating the airflow arriving from the first heat exchanger and directed back to the revolving drum, so that the airflow re-entering into the revolving drum is heated rapidly to a temperature higher than or equal to that of the air flowing out of the revolving drum.
  • the hot-air generator also comprises at least one filtering element which is placed along the air recirculating conduit, upstream of the centrifugal fan which, in turn, is usually located upstream of the first air/refrigerant heat exchanger.
  • the intake portion of the air recirculating conduit is generally divided into two consecutive sections the first of which is integrated in the door of the laundry drier, and the hot-air generator is provided with two independent filtering elements located along, respectively, the first and the second section of the intake portion of the air recirculating conduit.
  • the first section of the intake portion of the air recirculating conduit extends through the door of the laundry drier
  • the first filtering element generally consists of a net septum which covers the inlet of the first section realized on the rear face of the door.
  • the second section of the intake portion of the air recirculating conduit extends into the drier casing from a slit formed in the peripheral edge of the laundry loading/unloading opening
  • the second filtering element generally consists of a wedge-like filtering cartridge which is fitted into a slit formed in the peripheral edge of the laundry loading/unloading opening.
  • the door of the rotary-drum laundry drier is structured so to align, when placed in the closing position, the first section of the intake portion of the air recirculating conduit to the second section of the intake portion of the air recirculating conduit, thus allowing the airflow arriving from the revolving drum to freely flow towards the heat-pump assembly.
  • GB-2116068 discloses a wedge-like filtering cartridge for laundry driers which comprises a bag-shaped rigid shell having a V-shaped cross section, and which is dimensioned for being inserted into the slit formed in the peripheral edge of the laundry loading/ unloading opening.
  • the rigid shell is divided into two identical valve-like pieces which are laterally hinged to one another, so that the rigid shell is openable in a book-like manner.
  • the bottom wall of each valve-like piece is provided with two large throughout openings each of which is completely covered with a close-mesh net capable to restrain fluff and/or lint particles within the bag-shaped rigid shell.
  • the filtering cartridge also comprises an outwardly projecting peripheral web flap which is designed to overlap the outwardly projecting peripheral web flap of the other valve-like piece so as to form a sort of labyrinth seal.
  • some laundry driers features a third filtering element which is located along the air recirculating conduit, immediately upstream of the first air/refrigerant heat exchanger to stop the smallest fluff and/or lint particles.
  • this additional filtering element is housed in a drawer-like element located beneath the revolving drum, and which can be pulled out of the casing to allow the user to clean the filter.
  • Aim of the present invention is therefore to provide a home laundry drier featuring a simple and more efficient air filtering system, capable of significantly reducing laundry-driers production costs.
  • GB 2 091 123 discloses an air filter, for use in a clothes dryer using a current of air, comprising two sieves connected by a hinge. In use the filter is closed so that the sieves are almost parallel and act in series.
  • the upstream sieve may be corrugated and coarser in mesh than the flat downstream sieve.
  • the filter is located in the clothes defector immediately downstream of the rotary drying drum to prevent lint from reaching the condenser.
  • EP 0 106 289 discloses a laundry dryer having a perforated drying drum, an electric blower, at least one electric heater element, an arrangement of air ducts for circulating heated air through the drum for drying the laundry contained therein, and a lint retaining filter disposed in an air duct is provided with a monitoring device for detecting the operative condition, i.e. the state of clogging of the filter.
  • the monitoring device includes at least two sensor electrodes disposed in spaced relationship on or adjacent the filter so as to be short-circuited by moist lint accumulating thereon.
  • the Sensor electrodes are connected to signalling means and/or to an electric circuit controlling operation of the electrical components of the dryer, so as to indicate clogging of the filter through the signalling means and/or to deenergize the electrical components in a clogged condition of the filter.
  • EP 1 655 401 discloses a washing machine combined with a dryer.
  • a cabinet is provided, a tub is installed in the cabinet, an air-vent hose is installed at an outer surface of the tub, a lint filter assembly has one end connected to the air-vent hose to remove lint from air discharged from the tub, and an air-vent duct is connected to the other end of the lint filter assembly.
  • a filtering cartridge for home laundry driers as claimed in Claim 1 and preferably, though not necessarily, in any one of the dependent Claims.
  • a home laundry drier as claimed in claim 10 and preferably, though not necessarily, in the dependent claim.
  • number 1 indicates as a whole a wedge-like filtering cartridge suitable to be used in a home laundry drier 2 which comprises: a preferably, though not necessarily, parallelepiped-shaped outer box casing 3; a preferably, though not necessarily, cylindrical, bell-shaped revolving drum 4 for housing the laundry to be dried, and which is fixed in axially rotating manner inside casing 3, directly facing a laundry loading/unloading opening 3a formed in the front face of casing 3; and a door 5 hinged to the front face of casing 3 to rotate to and from a closing position in which door 5 rests completely against the casing to close opening 3a in the front face of the casing to seal revolving drum 4.
  • revolving drum 4 rests horizontally inside casing 3 on a number of horizontal supporting rollers 6 which are fitted to casing 3 to let revolving drum 4 freely rotate about its longitudinal axis L.
  • Casing 3, revolving drum 4, door 5 and supporting rollers 6 are commonly known parts in the industry, and therefore not described in detail.
  • laundry drier 2 also comprises a motor assembly 7 for rotating, on command, revolving drum 4 about its longitudinal axis L inside casing 3; and a closed-circuit, hot-air generator 8 housed inside casing 3 and designed to circulate through revolving drum 4 a stream of hot air having a low moisture level, and which flows over and rapidly dries the laundry inside drum 4.
  • closed-circuit, hot-air generator 8 provides for gradually drawing air from revolving drum 4; extracting surplus moisture from the hot air drawn from revolving drum 4; heating the dehumidified air to a predetermined temperature, normally higher than the temperature of the air from revolving drum 4; and feeding the heated, dehumidified air back into revolving drum 4, where it flows over, to rapidly dry, the laundry inside the drum.
  • hot-air generator 8 provides for continually dehumidifying and heating the air circulating inside revolving drum 4 to rapidly dry the laundry inside the drum, and substantially comprises:
  • hot-air generator 8 is preferably, though not necessarily, provided with a heat-pump assembly 11 which is able to both rapidly cool the airflow f coming out from revolving drum 4 for condensing the surplus moisture in the airflow f, and to rapidly heat the airflow f returning back into revolving drum 4, so that the airflow entering into revolving drum 4 is heated rapidly to a temperature higher than or equal to that of the same air flowing out of the drum.
  • heat-pump assembly 11 operates in the same way as a traditional heat-pump-which is capable of transferring heat from one fluid to another using an intermediate gaseous refrigerant subjected to a closed thermodynamic cycle, the thermodynamic principles of which are widely known and therefore not described in detail - and comprises:
  • Heat-pump assembly 11 finally comprises a number of suitable connecting pipes which connect refrigerant compressing device 12, air/refrigerant heat exchanger 13, air/refrigerant heat exchanger 14 and refrigerant expansion device 15 one to the other, so as to form a closed circuit allowing the refrigerant coming out from the outlet of compressing device 12 to flow, in sequence, through heat exchanger 14, refrigerant expansion device 15 and heat exchanger 13, before returning to the inlet of compressing device 12.
  • hot-air generator 8 is finally provided with filtering means which are placed along air recirculating conduit 9, upstream of heat exchangers 13 and preferably also of centrifugal fan 10, and are structured to avoid fluff and/or lint particles to reach and clog up at least heat exchangers 13 and 14.
  • the end wall 4a of revolving drum 4 is perforated, or at any rate permeable to air, so to permit air entry into drum 4, and the outlet of the air recirculating conduit 9 is coupled in airtight manner directly to the end wall 4a of revolving drum 4.
  • the inlet of air recirculating conduit 9, instead, is located on an annular frame delimiting the laundry loading/ unloading opening 3a, i.e. on the peripheral edge of the laundry loading/unloading opening 3a formed in the front face of casing 3.
  • electric centrifugal fan 10 is located preferably, though not necessarily, upstream of heat exchanger 13, and is structured to produce an airflow f which flows, along air recirculating conduit 9, in sequence across door 5, heat exchanger 13, heat exchanger 14 and the end wall 4a of revolving drum 4; and the filtering means of hot-air generator 8 are placed along the air recirculating conduit 9, upstream of centrifugal fan 10.
  • door 4 is structured so to airtight seal the laundry loading/ unloading opening 3a on casing 3, without however completely obstructing the inlet of the air recirculating conduit 9 located on the annular frame delimiting opening 3a, so that the airflow f arriving from revolving drum 4 can freely enter into the air recirculating conduit 9 and flow towards the heat-pump assembly 11; and the filtering means of hot-air generator 8 comprises at least the wedge-like filtering cartridge 1, which is inserted in easy-removable manner into the slit 3b formed in the annular frame delimiting the laundry laading/unloading opening 3a, i.e. in the peripheral edge of the laundry loading/unloading opening 3a formed in the front face of casing 3.
  • the filtering cartridge 1 comprises a substantially flat supporting plate 20 made of rigid plastic material, which is structured for being insertable in easy removable manner into the slit 3b formed in the peripheral edge of the laundry loading/unloading opening 3a, so as to completely close slit 3b; and a substantially bag-shaped hollow shell 21 made of rigid plastic material, which overhangingly protrudes from the rear face of supporting plate 20 so as to extend inside the starting section of air recirculating conduit 9.
  • Hollow shell 21 is realized in one piece with supporting plate 20 via an injection molding process, and is divided into two complementary flat valve-like pieces 22a and 22b, which are laterally hinged to one another preferably, though not necessarily, on the opposite side of supporting plate 20, so that hollow shell 21 is openable in a book-like manner (see Figure 2 ).
  • supporting plate 20 is substantially rectangular in shape, and is properly bend to match the profile of the annular frame delimiting the laundry loading/ unloading opening 3a, i.e. of the peripheral edge of the laundry loading/unloading opening 3a formed in the front face of casing 3; whereas opening 20a on supporting plate 20 is preferably, though not necessarily, completely covered by a grille made in one piece with the supporting plate 20 itself.
  • Hollow shell 21 instead has preferably, though not necessarily, a substantially V-shaped cross section, and the bottom wall of each valve-like piece 22a, 22b is provide with four adjoining throughout openings 21a, each of which is completely covered with a close-mesh net patch 23 properly dimensioned for restraining fluff and/or lint particles within the shell.
  • the main annular gasket 24 and/or the two additional annular gaskets 25 are made of SantopreneTM, i.e. a thermoplastic elastomer mixture of EPDM rubber (ethylene propylene diene M-class rubber) and polypropylene, having a hardness grade ranging preferably, though not necessarily, from 35 to 60 Shore A.
  • SantopreneTM i.e. a thermoplastic elastomer mixture of EPDM rubber (ethylene propylene diene M-class rubber) and polypropylene, having a hardness grade ranging preferably, though not necessarily, from 35 to 60 Shore A.
  • annular gasket 24 comes in abutment against the lateral wall of the starting section of air recirculating conduit 9, and is compressed so as to form a second substantially air-tight seal which prevents airflow f from bypassing the wedge-like filtering cartridge 1.
  • filtering cartridge 1 avoids the use of any additional filtering element located downstream of filtering cartridge 1, and dimensioned for retaining the smallest fluff and/or lint particles, thus allowing a reduction of the laundry-drier production costs.
  • filtering cartridge 1 is less expensive to produce than today's filtering cartridges.

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

Claims (11)

  1. Cartouche de filtration (1) destinée à un sèche-linge ménager (2) pourvu d'une ouverture de chargement/déchargement de linge (3a), d'une fente (3b) formée dans le bord périphérique de ladite ouverture de chargement/déchargement de linge (3a) et d'un conduit de recirculation d'air (9), ladite cartouche de filtration (1) comprenant une plaque de support (20) qui est réalisée en matière plastique et qui est structurée de façon à pouvoir être insérée de manière amovible dans ladite fente (3b) dudit sèche-linge (2) de manière à fermer complètement ladite fente (3b), et une coque creuse (21) sensiblement en forme de sac qui fait saillie en porte-à-faux depuis la face arrière de la plaque de support (20) de manière à s'étendre, lorsque ladite cartouche de filtration est insérée dans ladite fente (3b), à l'intérieur d'une section dudit conduit de recirculation d'air (9) dudit sèche-linge (2) ; caractérisé en ce que la coque creuse (21) est réalisée d'une seule pièce avec la plaque de support (20) par un procédé de moulage par injection, et est divisée en deux pièces complémentaires (22a, 22b) de type soupape qui sont reliées l'une à l'autre de façon articulées latéralement, chaque pièce (22a, 22b) de type soupape comprenant un bord périphérique d'accouplement, lesdits bords venant en butée l'un contre l'autre, la cartouche de filtration (1) étant également pourvue d'un premier joint annulaire (24) qui est réalisé en élastomère thermoplastique et qui est sur-injecté sur tout le bord périphérique de la plaque de support (20), et/ou d'un deuxième joint annulaire (25) qui est réalisé en élastomère thermoplastique et qui est sur-injecté le long de tout le bord périphérique d'accouplement d'au moins une des deux pièces (22a, 22b) de type soupape.
  2. Cartouche de filtration selon la revendication 1, caractérisée en ce qu'elle comprend deux deuxièmes joints annulaires (25) réalisés en élastomère thermoplastique, chacun d'eux étant sur-injecté le long de tout le bord périphérique d'accouplement d'une pièce (22a, 22b) respective de type soupape.
  3. Cartouche de filtration selon l'une quelconque des revendications précédentes, caractérisée en ce que les deux pièces (22a, 22b) de type soupape de la coque creuse (21) sont reliées l'une à l'autre de façon articulée sur le côté opposé de la plaque de support (20).
  4. Cartouche de filtration selon l'une quelconque des revendications précédentes, caractérisée en ce que ladite plaque de support (20) est pourvue d'une ouverture traversante (20a) à travers laquelle le flux d'air (f) peut entrer dans la coque creuse (21) ; et en ce que la paroi de fond de chaque pièce (22a, 22b) de type soupape de ladite coque creuse (21) est pourvue d'au moins une ouverture traversante (21a), qui est entièrement recouverte d'une grille ou d'un filet à mailles serrées ou d'une pièce de gaze (23) correctement dimensionné pour retenir les particules de peluches et/ou de fibres textiles dans la coque creuse (21).
  5. Cartouche de filtration selon la revendication 4, caractérisée en ce que l'ouverture traversante (20a) de la plaque de support (20) est recouverte par une grille d'une seule pièce avec la plaque de support (20) elle-même.
  6. Cartouche de filtration selon l'une quelconque des revendications précédentes, caractérisée en ce que la plaque de support (20) est sensiblement de forme rectangulaire, et est pliée incurvée correctement de façon à correspondre au profil du bord périphérique de l'ouverture de chargement/déchargement de linge (3a) du sèche-linge (2).
  7. Cartouche de filtration selon l'une quelconque des revendications précédentes, caractérisée en ce que la coque creuse (21) a une section transversale sensiblement en forme de V.
  8. Cartouche de filtration selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élastomère thermoplastique a une dureté dans la gamme allant de 35 à 60 Shore A.
  9. Cartouche de filtration selon l'une quelconque des revendications précédentes, caractérisée en ce que ledit premier joint annulaire (24) et/ou ledit deuxième joint annulaire (25) sont réalisés en Santoprene™.
  10. Sèche-linge ménager (2) comprenant une caisse d'enveloppe extérieure (3) et, à l'intérieur de la caisse,
    - un tambour rotatif (4) destiné à loger le linge à sécher, et fixé de manière à tourner axialement à l'intérieur de la caisse (3), directement face à une ouverture de chargement/déchargement de linge (3a) formée dans la face avant de la caisse (3) ;
    - une porte (5) reliée de façon articulée à la face avant de la caisse (3) de façon à pivoter vers et depuis une position de fermeture dans laquelle la porte (5) repose complètement contre la caisse pour fermer l'ouverture de chargement/déchargement de linge (3a) et fermer hermétiquement le tambour rotatif (4) ; et
    - un générateur d'air chaud (8) destiné à faire circuler un courant d'air chaud à l'intérieur du conteneur de séchage de linge (4) ; le générateur d'air chaud (8) comprenant de son côté
    - un conduit de recirculation d'air (9) relié aux deux extrémités au tambour rotatif (4) ;
    - des moyens de ventilation (10) capables de produire, le long du conduit de recirculation d'air (9), un flux d'air (f) qui circule à travers le tambour rotatif (4) ;
    - des moyens de refroidissement de flux d'air (13) situés le long du conduit de recirculation d'air (9) et capables de refroidir rapidement le flux d'air (f) sortant du tambour rotatif (4) pour condenser l'humidité excédentaire dans le flux d'air (f) ;
    - des moyens de chauffage du flux d'air (14) situés le long du conduit de recirculation d'air (9), en aval desdits moyens de refroidissement de flux d'air (13), et capables de chauffer rapidement le flux d'air (f) retournant dans le tambour rotatif (4) ; et
    - des moyens de filtration (1) qui sont placés le long du conduit de recirculation d'air (9), au amont moins des moyens de refroidissement de flux d'air (13), et qui sont structurés de manière à éviter que des particules de peluches et/ou de fibres textiles atteignent au moins les moyens de refroidissement de flux d'air (13) et les moyens de chauffage de flux d'air (14) ;
    l'entrée du conduit de recirculation d'air (9) étant définie par une fente (3b) formée dans le bord périphérique de l'ouverture de chargement/déchargement de linge (3a) ; ledit sèche-linge ménager (2) étant caractérisé en ce que lesdits moyens de filtration (1) comprend une cartouche de filtration (1) qui est insérée de manière facilement amovible dans la fente (3b) formée dans le bord périphérique de ladite ouverture de chargement/déchargement de linge (3a), et qui est réalisée selon l'une quelconque des revendications de 1 à 7.
  11. Sèche-linge ménager selon la revendication 10, caractérisé en ce que lesdits moyens de refroidissement de flux d'air (13) et lesdits moyens de chauffage de flux d'air (14) sont constitués respectivement d'un premier (13) et d'un second échangeur de chaleur air/réfrigérant (14) d'un ensemble formant pompe à chaleur (11) logé à l'intérieur de la caisse d'enveloppe extérieure (3).
EP09004020.5A 2009-03-20 2009-03-20 Cartouche de filtrage pour séchoirs à linge domestiques et séchage à linge fourni avec cette cartouche de filtrage Active EP2230349B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09004020.5A EP2230349B1 (fr) 2009-03-20 2009-03-20 Cartouche de filtrage pour séchoirs à linge domestiques et séchage à linge fourni avec cette cartouche de filtrage
RU2010110539/12A RU2539402C2 (ru) 2009-03-20 2010-03-19 Фильтрующий элемент для бытовой сушилки для белья и бытовая сушилка для белья, снабженная таким фильтрующим элементом

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09004020.5A EP2230349B1 (fr) 2009-03-20 2009-03-20 Cartouche de filtrage pour séchoirs à linge domestiques et séchage à linge fourni avec cette cartouche de filtrage

Publications (2)

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EP2230349A1 EP2230349A1 (fr) 2010-09-22
EP2230349B1 true EP2230349B1 (fr) 2016-05-11

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EP2876200B1 (fr) * 2013-11-25 2016-09-14 Electrolux Appliances Aktiebolag Appareil de séchage de linge
EP2990520B1 (fr) * 2014-08-29 2020-03-11 Electrolux Appliances Aktiebolag Sèche-linge comprenant un système de pompe à chaleur
KR102267891B1 (ko) 2014-12-01 2021-06-23 삼성전자주식회사 냉장고
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IT8234042V0 (it) * 1982-10-08 1982-10-08 Zanussi A Spa Industrie Macchina asciugabiancheria con dispositivo di controllo del filtro per la filaccia.
DE10029428A1 (de) * 2000-06-15 2002-01-03 Bsh Bosch Siemens Hausgeraete Luftführendes Haushaltsgerät mit waschbarem Filter
ITPN20010037U1 (it) * 2001-10-17 2003-04-17 Electrolux Zanussi Elettrodome Asciugabiancheria con filtro perfezionato
KR20060040352A (ko) * 2004-11-05 2006-05-10 엘지전자 주식회사 린트 필터 어셈블리가 장착된 건조 세탁기
JP4291352B2 (ja) * 2006-11-01 2009-07-08 パナソニック株式会社 ドラム式洗濯乾燥機

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RU2010110539A (ru) 2011-09-27
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