EP3693506B1 - Séchoir à linge et piège à peluches - Google Patents

Séchoir à linge et piège à peluches Download PDF

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Publication number
EP3693506B1
EP3693506B1 EP20154493.9A EP20154493A EP3693506B1 EP 3693506 B1 EP3693506 B1 EP 3693506B1 EP 20154493 A EP20154493 A EP 20154493A EP 3693506 B1 EP3693506 B1 EP 3693506B1
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EP
European Patent Office
Prior art keywords
filter wall
filter
spools
fluff
scraping member
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Application number
EP20154493.9A
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German (de)
English (en)
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EP3693506A1 (fr
Inventor
Fabio Roncati
Paolo MANTICA
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Candy SpA
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Candy SpA
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Publication of EP3693506A1 publication Critical patent/EP3693506A1/fr
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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
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/22—Lint collecting arrangements

Definitions

  • the present invention relates to a laundry dryer or combo washer dryer which provides for drying laundry by means of a drying air flow, in which the moist drying air from the laundry compartment passes through a fluff trap before entering into a heat exchanger for the moisture extraction by means of condensation.
  • the warm and dry drying air is conveyed into the laundry compartment, in particular a basket or drum, where, by passing through the wet laundry, it causes the evaporation of the water contained in the fabrics.
  • the drying air loaded with moisture passes through a heat exchanger where it is cooled down, in order to extract the moisture therefrom by means of condensation.
  • the dehumidified drying air is then sucked in again by the ventilator, heated and routed into the laundry compartment.
  • a fluff trap is arranged to protect the heat exchanger from pollution and sedimentation of substances extracted from the laundry together with the moisture, for example hair, fabric fibers, detergent residues, which would otherwise reduce the heat exchange efficiency and therefore the performance of the dryer.
  • the fluff trap is arranged upstream of the cooling heat exchanger (embodied by the heat pump evaporator) to protect both the latter and a subsequent heating heat exchanger (embodied by the condenser of the heat pump) from pollution and sedimentation of substances extracted from the laundry together with the moisture, for example hair, fabric fibers, detergent residues, which would otherwise reduce the heat exchange efficiency and therefore the performance of the dryer.
  • the cooling heat exchanger embodied by the heat pump evaporator
  • a subsequent heating heat exchanger embodied by the condenser of the heat pump
  • the additional fluff traps must be regularly extracted from the laundry dryer and cleaned by the user (usually after each drying cycle).
  • the positioning of the fluff traps in the lower part of the laundry dryer and the need to first open the base and extract and re-insert the fluff trap in a leaning posture create discomfort for the user.
  • the filtering systems of the background art and in particular the cleaning methods thereof are not yet satisfactory and it is desirable to have self-cleaning or partially self-cleaning fluff traps for laundry dryers, having features such as to obviate the need for frequent extractions, cleaning and re-insertions of the fluff trap into the household appliance.
  • the laundry dryer comprises an electronic control system, which can be programmed by the user to select or set respectively one of a plurality of drying cycles, and is configured to automatically activate the filter cleaning system, for example, according to the execution of the drying cycles.
  • a laundry dryer 1 comprises a housing 2 which houses a laundry compartment 3, in particular a drum or basket rotatable by means of a motor 4, an air circuit 5 for the drying air 6 which includes the laundry compartment 3, a heat exchanger 7 for extracting moisture from the drying air 6, as well as a fluff trap 8 positioned in the air circuit 5 downstream of the laundry compartment 3 and upstream of the heat exchanger 7.
  • the fluff trap 8 comprises a filter support structure 10, a sieve-filter wall 9 supported by the filter support structure 10 and a filter cleaning system 11 configured to brush and/or scrape the filter wall 9 (with the fluff trap 8 mounted in the laundry dryer 1).
  • the filter cleaning system 11 comprises:
  • the filter support structure 10 can comprise a filter housing, for example a frame or a grille made of plastic or metal material.
  • the filter housing may form an inlet opening 17 for the inlet of the air flow 6 coming from the laundry compartment 3, as well as one or more outlet openings 18 for the outlet of the air 6 after the filtering.
  • the filter support structure 10 or the filter housing supports the filter wall 9, for example at the inside thereof, so that an inlet surface 19 of the filter wall 9 faces against the direction of the flow of drying air 6 or, in other words, towards the inlet opening 17, and an opposite outlet surface 20 of the filter wall 9 faces in the direction of the flow of air 6 or, in other words, towards the outlet opening 18.
  • the fluff transported by the air flow 6 is deposited on the inlet surface 19 of the filter wall 9.
  • the filter wall 9 may consist of a mesh or a fabric made of a synthetic polymeric material, possibly reinforced with glass or carbon fibers or, alternatively, of a metal material, or of a perforated sheet of a synthetic or metal material.
  • the fluff trap 8 is preferably positioned in a front area of the laundry dryer 1, below the laundry compartment 3.
  • the movement device 16 comprises one or more, preferably two but possibly three or more, spools 21 or drums, at least one, more or all of which can be actuated in rotation, for example, by means of one or more electric motors 22.
  • the filter wall 9 is supported by said spools 21, for example wound about, or supported by and/or returned on, one or more of said spools 21, so that the rotary actuation of the one or more spools 21 moves the filter wall 9 in scraping or brushing contact against the scraping member 15.
  • the movement device 16 comprises two spools 21 spaced apart from each other, which can be actuated in rotation by means of a single electric motor 22.
  • the filter wall 9 is supported by said spools 21, so that:
  • the first spool 21' is arranged higher than, preferably vertically above, the second spool 21', so as to keep the filter wall 9 pull-tensioned in a vertical or at least approximately erected filtering plane 25 between said first 21' and second 21" spools.
  • the electric motor 22 can be coupled to a synchronization or differential transmission 26 which transmits the motion, in a planned manner, to the spools 21, 21', 21'.
  • the filter wall 9 is supported and pull-tensioned by the one or more spools 21, 21', 21" so as to be extending along an extension path 27 between end paths 28, in which, during the movement of the filter wall 9 in scraping contact against the scraping member 15, the extension path 27 remains substantially unchanged and at least one or more of the end paths 28 undergo a variation of the winding length.
  • extension path 27 saves space and allows an easier washing of the filter wall by means of the spray nozzles 12.
  • the scraping member 15 comprises one or more scrapers or brushes:
  • the fluff trap 8 forms a reaction surface 30 arranged at the scraping member 15, but on the side of the filter wall 9 opposite with respect to the side (inlet surface 19) on which the scraping member 15 acts, so as to form an abutment for the thrust of the scraping member against the filter wall 9 and avoid undesirable deformations of the latter.
  • the reaction surface 30 is formed by one of the spools 21 or by a portion of a filter wall wound on one of the spools 21.
  • reaction surface 30 is formed at a distance from the spool or spools 21.
  • the scraping member 15 is kept in contact against the filter wall 9 at one of the spools 21, preferably at the aforesaid second (lower) spool 21".
  • the scraping member 15 is positioned below (preferably vertically below) the aforesaid second (lower) spool 21" and in contact from below against the filter wall 9.
  • the scraping member 15 comprises a linear brush extending in a direction transverse with respect to the movement direction of the filter wall 9 and/or extending parallel to the rotation axis of the spool 21 with which it is associated.
  • the scraping member 15 can be moved in a direction transverse with respect to the movement direction of the filter wall 9 and/or parallel to the rotation axis of the spool 21 with which it is associated. Thereby a bi-directional brushing effect is obtained.
  • the scraping member 15 can be moved in rotation and in contact with (the inlet surface 19 of) the filter wall 9, in particular, in rotation in the same direction of rotation of the spool 21 to which it is associated. Thereby the relative brushing speed between the scraping element 15 and the filter wall 9 increases.
  • the spray nozzles 12 are connected to a water supply system 31 which supplies mains water and/or washing water from a suitable water tank 32 and/or water condensed from the drying air flow 6.
  • the spray nozzles 12 are positioned in an upper part of the fluff trap 8 and spray from the top downwards against (the inlet surface 19 of) the filter wall 9.
  • the spray nozzles 12 direct pressurized water jets onto the (inlet surface 19 of) the filter wall 9, preferably at an impact angle 39 lower than 60°, preferably lower than 45° with respect to the plane of the filter wall 9 at the point of impact of the water jet.
  • the area in which the pressurized water jets impact on the filter wall 9 is arranged in an area in which the filter wall is free from supports, preferably in an area between two spools 21, 21', 21".
  • the spray nozzles 12 direct the water jets substantially in the movement direction of the filter wall 9 and/or downwards. This facilitates the collection of water sprayed together with the fluff detached from the filter wall 9 in a lower area of the fluff trap 1.
  • the spray nozzles 12 can be stationary or can be actuated in movement, e.g., they can perform:
  • a nozzle movement device 40 can be provided, for example, a fluid-dynamic device actuated by the pressure of the water supplied to the spray nozzles 12, or an electric motor, or a transmission which couples and/or synchronizes the movement of the spray nozzles 12 with the movement of the filter wall 9.
  • the filter cleaning system 11 further comprises a fluff transport system 33 with a fluff collection container 34, arranged below the scraping member 15 and adapted to collect the water sprayed by the spray nozzles 12 and the fluff separated from the filter wall 9, as well as with a transport duct 35, possibly equipped with a transport pump 36, which connects the fluff collection container 34 to a collection tray 37 which can be extracted and emptied by the user.
  • a fluff transport system 33 with a fluff collection container 34, arranged below the scraping member 15 and adapted to collect the water sprayed by the spray nozzles 12 and the fluff separated from the filter wall 9, as well as with a transport duct 35, possibly equipped with a transport pump 36, which connects the fluff collection container 34 to a collection tray 37 which can be extracted and emptied by the user.
  • the laundry dryer 1 comprises an electronic control system 38, which can be programmed by the user to select or set one of a plurality of drying cycles, respectively, and configured to automatically activate the filter cleaning system 11, for example, according to the execution of the drying cycles, for example, after each drying cycle or after a predetermined number of hours of operation of the laundry dryer 1.
  • the filter wall 9 remains stationary in a position, facing the flow of drying air 6, so as to trap the fluff on the surface 19 facing the air flow.
  • the fluff removal cycle 14 which will be defined within the drying cycle in terms of frequency and duration, consists of a first washing action of the filter wall 9 with the use of water applied by means of the spray nozzles 12 from the top downwards.
  • a step is added of mechanical removal of the fluff 14 from the filter wall 9, by means of the scraping member 15 (preferably a stationary brush) positioned at a lower area of the filter wall 9 and which collects the fluff 14 remaining on the filter wall 9 which, sliding downwards, conveys such fluff 14 against the scraping member 15.
  • the scraping member 15 preferably a stationary brush
  • the fluff that is detached and collected at the scraping member 15 is deposited in the collection container 34 in the lower part of the filtering device 8 and evacuated by means of and together with the water dispensed by the spray nozzles 12.
  • the invention described so far can be advantageously implemented in laundry dryers with a closed air circuit, with an electrical resistor or with a heat pump.
  • the drying air 6 is conveyed by means of a ventilator 41 (activated by a motor 42), is heated by means of an electrical resistor 43 and is routed into the laundry compartment 3, in particular a rotatable basket or drum, where, by passing through the wet laundry, causes the evaporation of the water contained in the fabrics.
  • a ventilator 41 activated by a motor 42
  • an electrical resistor 43 is routed into the laundry compartment 3, in particular a rotatable basket or drum, where, by passing through the wet laundry, causes the evaporation of the water contained in the fabrics.
  • the drying air 6 loaded with moisture passes through the heat exchanger 7, where it is cooled down, for example by means of a flow of cold water or of fresh air 44 conveyed by means of a second ventilator (preferably, but not necessarily, activated by means of the same electric motor 42), in order to extract the moisture therefrom by means of condensation.
  • a second ventilator preferably, but not necessarily, activated by means of the same electric motor 42
  • the condensation is collected in a condensation container which can be extracted, or drained by means of a drain pump and/or together with the cooling water.
  • the dehumidified drying air 6 is then sucked in again by the ventilator 41, heated by means of the electrical resistor 43 and rerouted into the laundry compartment 3.
  • the fluff trap 8 Upstream of the heat exchanger 7 (where the moisture extraction occurs) the fluff trap 8, with the cleaning system 11 described above, is arranged.
  • the drying air 6 loaded with moisture passes through a first (cold) heat exchanger 45 embodied by an evaporator 46 of the heat pump, where the air 6 is cooled down in order to extract the moisture therefrom by means of condensation.
  • the condensation may be collected in a condensation container which can be extracted, or may be drained, e.g., by means of a drain pump.
  • the dehumidified and cooled drying air 6 is then routed into a second (hot) heat exchanger consisting of a condenser 47 of the heat pump, where the air is heated up.
  • the dehumidified and heated air is sucked in by means of a ventilator 41, and routed again into the laundry compartment 3 in order to continue the extraction of the moisture from the laundry.
  • the heat pump further comprises a compressor 48 which sucks in a refrigerant fluid through the evaporator 46, where the fluid itself evaporates at low pressure (absorbing the heat of the drying air 6), compresses the refrigerant fluid and pushes it inside the condenser 47 where the compressed and heated refrigerant fluid condenses and cools down at high pressure (releasing its heat to the drying air 6).
  • the refrigerant fluid passes through a thermal expansion valve 49 which reduces the fluid pressure, with a consequent lowering of the temperature and, subsequently, enters again in the evaporator 46, restarting the cycle.
  • the fluff trap 8, or only the filter wall 9 may be assembled in the housing 2 in a manner extractable from the laundry dryer 1.
  • control system 38 is in signal connection with and controls the electrical supply of the individual functional groups of the laundry dryer 1, as diagrammatically shown in Figures 1 and 2 .
  • the control system 35 may further comprise an optical indicator, e.g., a LED, display, etc. or an acoustic indicator to signal to the user the need to extract the fluff collected in the collection tray 37.
  • an optical indicator e.g., a LED, display, etc. or an acoustic indicator to signal to the user the need to extract the fluff collected in the collection tray 37.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Claims (14)

  1. Piège à peluches (8) pour un séchoir à linge (1), dans lequel le piège à peluches (8) comprend une structure de support de filtre (10), une paroi de filtre à tamis (9) supportée par la structure de support de filtre (10) et un système de nettoyage de filtre (11),
    dans lequel le système de nettoyage de filtre (11) comprend :
    - une ou plusieurs buses de pulvérisation (12) supportées par la structure de support de filtre (10) et configurées pour pulvériser un ou plusieurs jets d'eau sous pression (13) sur la paroi de filtre (9) pour tremper et détacher des peluches (14) de la paroi de filtre (9),
    caractérisé en ce que le système de nettoyage de filtre (11) comprend en outre :
    - un élément de raclage (15) supporté par la structure de support de filtre (10) dans une position de raclage contre la paroi de filtre (9),
    - un dispositif de déplacement de filtre (16) configuré pour déplacer la paroi de filtre (9) par rapport à la structure de support de filtre (10) et par rapport à l'élément de raclage (15) de sorte que l'élément de raclage (15) écarte les peluches (14) trempées par brossage à partir de la paroi de filtre (9),
    - un dispositif de déplacement de buse (40) pour déplacer les buses de pulvérisation pendant la distribution d'eau.
  2. Séchoir à linge (1) comprenant un logement (2) qui loge :
    - un compartiment à linge (3),
    - un circuit d'air (5) qui comprend le compartiment à linge (3) et un échangeur de chaleur (7) pour extraire l'humidité de l'air de séchage (6),
    - un piège à peluches (8) selon la revendication 1, positionné dans le circuit d'air (5) en aval du compartiment à linge (3) et en amont de l'échangeur de chaleur (7);
  3. Séchoir à linge (1) selon la revendication 2, dans lequel le dispositif de déplacement de filtre (16) comprend une ou plusieurs bobines (21) qui peuvent être actionnées en rotation au moyen d'un ou plusieurs moteurs électriques (22) et la paroi de filtre (9) est supportée par lesdites une ou plusieurs bobines (21), de sorte que l'actionnement rotatif des une ou plusieurs bobines (21) déplace la paroi de filtre (9) en contact par brossage contre l'élément de raclage (15).
  4. Séchoir à linge (1) selon la revendication 3, dans lequel le dispositif de déplacement de filtre (16) comprend deux bobines (21) espacées l'une de l'autre et la paroi de filtre (9) est supportée par lesdites deux bobines (21), de sorte que :
    - l'actionnement rotatif des deux bobines (21) dans une première direction de rotation (23) déroule la paroi de filtre (9) à partir d'une première bobine (21') des deux bobines (21', 21") et enroule la paroi de filtre (9) sur une seconde bobine (21") des deux bobines (21', 21"), maintenant une portion de la paroi de filtre (9) s'étendant entre la première bobine (21') et la seconde bobine (21") et maintenant la paroi de filtre (9) toujours en contact par brossage contre l'élément de raclage (15),
    - l'actionnement rotatif des deux bobines (21) dans une seconde direction de rotation (24) déroule la paroi de filtre (9) à partir de la seconde bobine (21") des deux bobines (21', 21") et enroule la paroi de filtre (9) sur la première bobine (21') des deux bobines (21', 21"), maintenant une portion de la paroi de filtre (9) s'étendant entre la première bobine (21') et la seconde bobine (21"),
    dans lequel, la première bobine (21') est agencée verticalement au-dessus de la seconde bobine (21'), de façon à maintenir la paroi de filtre (9) tendue par traction dans un plan de filtration vertical (25) entre lesdites première (21') et seconde (21") bobines.
  5. Séchoir à linge (1) selon la revendication 3 ou 4, dans lequel le moteur électrique (22) est couplé à une transmission de synchronisation ou de différentiel (26) qui transmet le mouvement aux bobines (21, 21', 21').
  6. Séchoir à linge (1) selon l'une des revendications 3 à 5, dans lequel la paroi de filtre (9) est supportée et tendue par traction par les une ou plusieurs bobines (21, 21', 21") de façon à s'étendre le long d'un trajet d'extension (27) entre des trajets d'extrémité de déplacement (28) le long desquels la paroi de filtre (9) est enroulée autour des bobines (21, 21', 21"), dans lequel pendant le déplacement de la paroi de filtre (9) en contact contre l'élément de raclage (15), le trajet d'extension (27) reste sensiblement inchangé et au moins l'un des trajets d'extrémité de déplacement (28) subit une variation de la longueur d'enroulement.
  7. Séchoir à linge (1) selon l'une des revendications précédentes 2 à 6, dans lequel l'élément de raclage (15) comprend un ou plusieurs racloirs ou brosses en contact avec la paroi de filtre (9) et :
    A) lesdits un ou plusieurs racloirs ou brosses sont :
    - stationnaires, ou
    - mobiles au moyen d'un propre actionneur de raclage (29), ou
    - mobiles au moyen du même actionneur (22) du dispositif de déplacement de filtre (16),
    B) le piège à peluches (8) forme une surface de réaction (30) agencée au niveau de l'élément de raclage (15), mais sur le côté de la paroi de filtre (9) opposé par rapport au côté sur lequel l'élément de raclage (15) agit, de façon à former une butée pour la poussée de l'élément de raclage contre la paroi de filtre (9).
  8. Séchoir à linge (1) selon la revendication 7 et 3, dans lequel la surface de réaction (30) est formée par l'une des bobines (21) ou par une portion de paroi de filtre (9) enroulée sur ladite bobine (21).
  9. Séchoir à linge (1) selon la revendication 4, dans lequel l'élément de raclage (15) est maintenu en contact contre la paroi de filtre (9) au niveau de la seconde bobine inférieure (21").
  10. Séchoir à linge (1) selon la revendication 9, dans lequel l'élément de raclage (15) est positionné sous la seconde bobine (21") et en contact depuis le dessous contre la paroi de filtre (9).
  11. Séchoir à linge (1) selon l'une quelconque des revendications précédentes, telles que dépendantes de la revendication 3, dans lequel l'élément de raclage (15) comprend une brosse linéaire s'étendant parallèlement à l'axe de rotation de la bobine (21) à laquelle il est associé.
  12. Séchoir à linge (1) selon l'une quelconque des revendications précédentes 2 à 11, dans lequel l'élément de raclage (15) est mobile :
    - dans une direction transversale par rapport à la direction de déplacement de la paroi de filtre (9), ou
    - en rotation et en contact avec la paroi de filtre (9).
  13. Séchoir à linge (1) selon l'une quelconque des revendications précédentes 2 à 12, dans lequel :
    A) les buses de pulvérisation (12) sont positionnées dans une partie supérieure du piège à peluches (8) et pulvérisent du haut vers le bas contre la paroi de filtre (9), et/ou
    B) les buses de pulvérisation (12) dirigent des jets d'eau à un angle d'impact (39) inférieur à 45° par rapport au plan de la paroi de filtre (9) au niveau du point d'impact du jet d'eau,
    dans lequel la zone dans laquelle les jets d'eau sous pression présentent un impact sur la paroi de filtre (9) est agencée dans une région dans laquelle la paroi de filtre (9) est exempte de supports.
  14. Séchoir à linge (1) selon l'une quelconque des revendications précédentes 2 à 13, dans lequel le système de nettoyage de filtre (11) comprend un système de transport de peluches (33) comportant :
    - un récipient de collecte de peluches (34) agencé sous l'élément de raclage (15) et adapté pour collecter l'eau pulvérisée par les buses de pulvérisation (12) et les peluches séparées de la paroi de filtre (9),
    - un conduit de transport (35) qui raccorde le récipient de collecte de peluches (34) à un plateau de collecte (37) qui peut être extrait et vidé par l'utilisateur.
EP20154493.9A 2019-02-08 2020-01-30 Séchoir à linge et piège à peluches Active EP3693506B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000001819A IT201900001819A1 (it) 2019-02-08 2019-02-08 Macchina asciugabiancheria e filtro per lanugine

Publications (2)

Publication Number Publication Date
EP3693506A1 EP3693506A1 (fr) 2020-08-12
EP3693506B1 true EP3693506B1 (fr) 2021-06-23

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IT (1) IT201900001819A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7117465U (de) * 1971-04-30 1972-10-05 Siemens-Electrogeraete Gmbh Nach dem Trommelprinzip arbeitender Wäschetrockner
DE102005055179A1 (de) * 2005-11-18 2007-05-24 BSH Bosch und Siemens Hausgeräte GmbH Flusenfiltereinrichtung und Verfahren zum Reinigen einer Flusenfiltereinrichtung
AU2009327712B2 (en) * 2008-12-17 2014-01-16 Lg Electronics Inc. Dryer and foreign material removing apparatus thereof
EP3090093B1 (fr) * 2013-12-30 2018-12-19 Electrolux Appliances Aktiebolag Appareil de traitement de linge ayant un agencement de lavage de filtre à peluches
KR101718040B1 (ko) * 2015-06-18 2017-03-20 엘지전자 주식회사 건조기능을 구비한 의류처리장치

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EP3693506A1 (fr) 2020-08-12

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