EP2202349B1 - Appareil de séchage de linge et procédé de nettoyage d'un crible - Google Patents

Appareil de séchage de linge et procédé de nettoyage d'un crible Download PDF

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Publication number
EP2202349B1
EP2202349B1 EP09178896.8A EP09178896A EP2202349B1 EP 2202349 B1 EP2202349 B1 EP 2202349B1 EP 09178896 A EP09178896 A EP 09178896A EP 2202349 B1 EP2202349 B1 EP 2202349B1
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EP
European Patent Office
Prior art keywords
filter
cleaning
process air
laundry drying
drying device
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.)
Active
Application number
EP09178896.8A
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German (de)
English (en)
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EP2202349A3 (fr
EP2202349A2 (fr
Inventor
Klaus Grunert
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2202349A2 publication Critical patent/EP2202349A2/fr
Publication of EP2202349A3 publication Critical patent/EP2202349A3/fr
Application granted granted Critical
Publication of EP2202349B1 publication Critical patent/EP2202349B1/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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the invention relates to a laundry drying appliance, having a sieve for sifting out bodies, in particular fluff, from a process air stream flowing through a process air duct of the laundry drying appliance, and having a cleaning device for cleaning the sieve, the sieve being arranged in space at an angle ( ⁇ ) is arranged obliquely, at least one cleaning opening for supplying a cleaning liquid onto a screen surface of the screen is arranged at an upper portion of the screen, and the screen is stationary.
  • the invention also relates to a method for cleaning a filter of such a laundry drying device.
  • From the DE 100 02 743 A1 is a heat pump tumble dryer with a cleaning device for the heat exchanger.
  • the EP 0 269 864 A1 the result is a filter device with liquid-wetted filter elements for a ventilation system.
  • the KR 10 2007 0076853 A The result is a tumble dryer with a fluff filter that can be cleaned with a liquid.
  • the JP H06 2907 A the result is a filter for a ventilation device which can be cleaned by means of a liquid and which is positioned at an angle with respect to a gas stream flowing through.
  • a dryer for drying laundry by means of an air flow is known.
  • a screen for filtering lint from an air flow in the process air duct is arranged in the area of an end shield, which screen forms a first lint filter.
  • the fluff collected in the process air duct on the filter is scraped off the filter fabric of the fluff filter by means of a squeegee and stored in a container arranged adjacent to the squeegee and the filter. The squeegee and the container thus form, together with other components, a first cleaning device.
  • the container has relatively small dimensions. Fluff from around 7 to 10 drying processes can be collected in it. Since the fluff is stored in the dry state, it takes up a relatively large volume. On the one hand, access to the collection container is restricted in these dryers, and on the other hand the collection volume is limited by its arrangement in a space-limited zone of the dryer, resulting in a relatively frequent maintenance interval for disposing of the fluff from the container.
  • the dryer features furthermore via a heater as a heat source and an air-to-air heat exchanger as a heat sink in the process air duct.
  • U.S. 2006/0123854 A1 relates to a washing machine combined with a dryer.
  • a cabinet is provided, a tub is installed in the cabinet, a vent hose is attached to an outer surface of the tub, a lint filter assembly has an end connected to the vent hose to remove lint from air exiting the tub is vented and a vent line is connected to the other end of the lint filter assembly.
  • the lint filter assembly collects lint from the moist air flowing through it. The collected lint deposits on a filter of the lint filter assembly, and the deposit of the lint is removed by injecting water from a water inlet pipe onto the filter from the front.
  • the removed fluff is fed into the tub through the vent hose.
  • the lint filter assembly installed in the cabinet is inclined at a predetermined angle toward the front of the washing machine so that a user can easily remove the filter unit from the front of the washing machine and repair the lint filter assembly.
  • WO 2009/015919 A1 relates to an arrangement for automatically cleaning air filters, in particular those designed for use as applied to the drying circuit of a washing machine for clothes, which operates according to a heat pump principle, having at least one sharp-jet injection nozzle for injecting liquid and at least one air filter unit, wherein the liquid injection nozzle is mounted so as to be able to move relative to a fixed frame, the relative movement being brought about by at least one actuator means connected thereto.
  • the air filter unit and/or the liquid injection nozzle can be connected to the frame by means of a four-bar linkage.
  • the relative movement of the air filter unit to the injection nozzle is required for cleaning, which requires a high level of equipment and a large amount of space.
  • the laundry drying appliance according to the invention having a sieve for sifting out bodies, in particular fluff, from a process air flow flowing through a process air duct of the laundry drying appliance, and having a cleaning device for cleaning the sieve, the sieve being inclined in space at an angle ( ⁇ ) relative to the process air flow flowing through is arranged, at least one cleaning opening for supplying a cleaning liquid to a screen surface of the screen is arranged in an upper area of the screen and the screen is stationary, is characterized in that the process air duct has a substantially vertical extension at least in the area of the screen, and namely with a flow direction of a process air guided in the process air duct running predominantly from top to bottom.
  • Such a filter can easily be cleaned of adhering lint without manual intervention on the part of a user of the household appliance by means of an automatically operated cleaning device, which flushes a cleaning liquid over the lint filter in such a way that the adhering lint is removed from a filter surface of the filter.
  • the screen is arranged in space at an angle relative to the flow of process air flowing through.
  • a cleaning liquid applied to the screen e.g. B. water
  • applying the cleaning liquid under pressure can further increase the cleaning performance.
  • the sieve is installed stationary (and is therefore not specifically moved for cleaning) in order to achieve a simple arrangement.
  • the effective cleaning effect can be made possible in particular by arranging the cleaning opening in the upper area.
  • the process air duct has, at least in the area of the screen, a substantially vertical extension (i.e. vertical or deviating insignificantly for the purpose) with a flow direction of a process air guided in the process air duct running predominantly from top to bottom, which is very streamlined and advantageous for one the cleaning liquid is drained.
  • At least one cleaning opening for supplying the cleaning liquid to a screen surface of the screen is arranged in an upper area of the screen.
  • the cleaning liquid can be applied to the screen surface particularly easily in a compact design.
  • the arrangement in an upper area can in particular include the cleaning opening being arranged above, in particular essentially directly above, the screen. In other words, the cleaning opening can essentially directly border the screen.
  • the cleaning liquid can be applied to the screen in a particularly simple and complete manner.
  • the at least one cleaning opening can lead to a common liquid line and/or to a common inflow chamber of the cleaning device.
  • the at least one cleaning opening can be embodied as a nozzle for an increased cleaning effect, even in the case of bodies adhering to a greater extent on the filter, in particular fluff.
  • a large-area wetting of the screen can also be ensured by shaping the nozzle jet.
  • a cleaning liquid can be directed through a nozzle and guided over the screen surface of the screen with increased entraining force.
  • the at least one cleaning opening can be aligned flush with the screen surface of the screen.
  • the at least one cleaning opening is aligned at an angle, in particular a small angle, to the surface of the screen.
  • the angle is advantageously less than 5°.
  • the liquid line preferably opens into an inflow chamber, which is partially separated from the at least one cleaning opening by an intermediate wall. This enables the cleaning liquid to be distributed more evenly over a large number of such cleaning openings.
  • the inflow chamber can have a bypass on the underside for draining residual water, so that it does not remain in it and cause unpleasant odors over time.
  • a discharge channel can be formed in a lower area of the screen for disposal of cleaning liquid conducted over the screen. This preferably bypasses the condenser and ends behind the condenser again in the process air duct. Used cleaning liquid can thus be disposed of together with condensed water from the condenser, so that no separate disposal means need to be provided.
  • At least a section of the discharge channel adjacent to the screen can be integrated with the screen. In this way, it can be achieved that no projections such as sharp edges, burrs, etc., on which fluff etc. could get caught, occur at the transition from filter to drain channel. This supports a complete cleaning of the sieve. For this purpose, it can be particularly advantageous if a screen surface of the screen is arranged higher or flush with it in a transition area to the discharge channel.
  • the cleaning device can be installed in a bearing plate, in particular a front bearing plate.
  • the cleaning device can be installed in a particularly compact and streamlined manner in a front process air duct, which is directly connected to a laundry drum.
  • pressure losses in the process air can be avoided, e.g. B. could be caused by turbulence.
  • the screen is integrated into the cleaning device, since this minimizes manufacturing tolerances and improves the cleaning result. It is particularly preferred if the at least one cleaning opening is integrated into a screen frame of the screen. It is also particularly preferred if the discharge channel or a part thereof adjoining the screen is integrated into the screen frame.
  • the sieve can be permanently installed or removable in the laundry drying device.
  • the screen of a laundry drying device is cleaned by means of a cleaning device, wherein the screen is arranged at an angle obliquely in space and a cleaning liquid advantageously from above over the obliquely built-in Sieve is passed.
  • the guiding can be essentially pressureless pouring.
  • the activation of the method can be triggered automatically by a control device of the household appliance as required, in fixed cycles and/or manually.
  • FIG 1 shows components of a laundry drying device 1, such as a tumble dryer or washer-dryer.
  • the laundry drying device 1 has a laundry drum 3, which is used to dry laundry 4 placed therein.
  • the process air L located in the laundry drum 3 is humidified, with bodies F such as fluff also getting into the process air L.
  • the process air L is discharged from the laundry drum 3 via a process air duct 5 connected to it.
  • a lint filter 7 extends through the process air duct 5 in order to filter or sift out at least a portion of the bodies F from the process air.
  • These are, for example, a condenser or a heating device, which are used to dehumidify or heat up the cleaned process air L* before the cleaned process air L* is blown back into the laundry drum 3 .
  • the process air duct 5 runs vertically from top to bottom in the area with the fluff filter 7 inserted therein.
  • the fluff filter 7 is used at an angle ⁇ obliquely through the process air duct 5 leading into this. Accordingly, the process air flow flowing through the process air duct 5 flows through it obliquely.
  • a fluff filter cleaning device 9 which flushes fresh water W over the fluff filter 7 as a cleaning liquid, serves to clean the fluff filter 7 .
  • the cleaning liquid W runs over or along a fluff filter surface of the fluff filter 7 to its lower area.
  • a discharge channel 13 the section of which adjoining the fluff filter 7 is part of a fluff filter housing 10, in particular a filter frame.
  • the discharge channel 13 allows the cleaning liquid W* that has flowed over the surface of the fluff filter and is therefore soiled to exit.
  • the soiled cleaning liquid W* is conducted via a channel 13 to a liquid container 8 for transport.
  • the liquid tank 8 is a condensate water tank in which condensate water discharged from the condenser is also collected.
  • the cleaning liquid W is supplied from a fresh water line 18 .
  • the cleaning device 9 has an inflow chamber 11 in the entry area of the liquid line 18 .
  • the actual spraying of the cleaning liquid W onto the lint filter surface of the lint filter 7 takes place via one or more nozzles 16. More precisely, the inflow chamber 11 is divided into two shell-shaped parts by an upwardly open partition 14, with a first, inner chamber 11a directly connected to the nozzles 16 is connected and a second, outer chamber 11b is flowed through by the liquid line 18.
  • a bypass 15 is formed in the lower region of the intermediate wall 14 .
  • the bypass 15 preferably has a relatively small diameter through which residual water can drain.
  • the starting point is therefore that the fluff filter 7 is used in a process air duct 5 of a washing machine or tumble dryer 1 .
  • the fluff filter 7 preferably has a surface with a functional coating, in particular a hydrophobic coating, which makes it difficult for bodies F to adhere firmly.
  • a functional coating in particular a hydrophobic coating, which makes it difficult for bodies F to adhere firmly.
  • the cleaning liquid W is flushed over the lint filter 7 in order to detach the bodies F located thereon from the surface of the lint filter by means of the cleaning liquid W and transport them away from the lint filter 7 .
  • the cleaning device 9 for applying the cleaning liquid W is integrated into the fluff filter 7 .
  • the fluff filter material preferably consists of metal or has metal.
  • the fluff filter material is preferably made of corrosion-resistant material, in particular of a material that is corrosion-resistant to the action of lye or water.
  • high-grade steel or aluminum can advantageously be used as the fluff filter material, which are temperature-resistant and, if necessary, can easily be given a hydrophobic coating with suitable finishing materials. It is preferred if such a hydrophobic finish is implemented as a nano-varnish and/or causing a lotus effect on or on the fluff filter material.
  • the fluff filter material with the equipment is preferably arranged as a woven fabric, scrim or as a perforated foil or sheet.
  • the lint filter 7 can preferably be removed from the process air duct 5 and the lint filter cleaning device 9 in order to allow a service technician access for service purposes.
  • the nozzle 16 as in FIG 1 shown for the distribution of the cleaning liquid W on or over the surface of the fluff filter can be aligned flush with the upper side of the fluff filter fabric of the fluff filter 7, there is also the possibility according to FIG a modified embodiment, the nozzle 19 as in FIG 2 shown to employ at an angle to the fluff filter surface.
  • the cleaning effect can be optimized by a suitable choice of an inflow angle, which can also be adjusted in particular in connection with an inclination of the fluff filter 7 relative to the surrounding space.
  • the bodies F are preferably also removed from the lint filter 7 by means of the cleaning liquid W via an outlet in the form of the outflow chamber 12, which is integrated in the lint filter 7 is.
  • the design is chosen so that in the transition area between the fluff filter 7 or its surface and an adjacent peripheral wall of the outflow chamber 12 there are no sharp edges, burrs, etc., on which such bodies F can get caught or become stuck, which means that cleaning is complete would prevent.
  • the lower edge of the transport channel or the outflow chamber 12 is aligned flush with the upper side of the fluff filter fabric.
  • FIG 1 An embodiment as in FIG 1 , in which the nozzle or nozzles 16 for distributing the cleaning liquid on the fluff filter 7 are integrated into the fluff filter housing 10 or into a fluff filter frame of the fluff filter 7 to improve the cleaning effect. It is also preferred if, in order to improve the lint removal from the lint filter 7 , the channel for the removal 13 or the outflow chamber 12 is integrated into a lower section of the lint filter frame of the lint filter 7 .
  • an angle ⁇ to the lint filter extension of the surface of the lint filter 7 relative to the process air duct extension z and/or relative to the vertical in the space around the lint filter 7 is selected so obliquely that a cleaning liquid sprayed in the upper area onto the lint filter surface of the lint filter 7 over the Lint filter surface can easily drain to the outflow chamber 12 arranged on the underside.
  • the gravitational force is utilized, which causes the cleaning liquid W to drain over the surface of the lint filter 7 from the nozzle(s) 16 to the lint filter outflow chamber(s) 12 .
  • the gravitational effect is supported, particularly in the case of close-meshed fluff filters, by the process air L being pressed against the fluff filter surface or sucked through it, or by spraying the cleaning liquid by means of the nozzle 16 , 19 .
  • a cleaning liquid can also be supplied from another liquid container or from a fresh water line.
  • the dirty cleaning liquid W* does not necessarily have to be introduced into the liquid container 8, which is used to hold condensate water.
  • the soiled cleaning liquid W* can also be introduced into a separate liquid container or discharged directly from the laundry drying device 1 via an outlet.
  • the cleaning device 9 can in particular consist of a one-piece fluff filter housing 10 which is arranged obliquely in space. It is also possible to implement an in FIG 1 preferably outlined variant, in which the process air duct 5 has beveled tube wall ends and engages from two sides in corresponding receptacles of the cleaning device 9 or of its fluff filter housing 10 .
  • the channel 13 for transporting the soiled cleaning liquid W* away can also be used as an independent component, for example as a hose in an outlet opening of the outflow chamber 12 .
  • the exemplary sequence of components of the tumble dryer as a tumble dryer 1 can also be in a different order.
  • a fluff filter 7 not only needs to be arranged in the process air duct 5 directly behind the drum housing 2, but can also be arranged at any other point in the process air duct 5.
  • the use of such a fluff filter 7 in a differently designed process air duct is also possible, for example in an air supply duct or in an air discharge duct, which lead to the outside of the laundry drying device 1 and are not designed as a closed process air circuit.

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

Claims (14)

  1. Appareil de séchage de linge (1) comportant un crible (7) pour filtrer des corps (F), et plus particulièrement des peluches, d'un courant d'air de processus traversant un conduit d'air de processus (5) de l'appareil de séchage de linge (1) et comportant un dispositif de nettoyage (9) pour nettoyer le crible (7), le crible (7) étant agencé en oblique en formant un angle (α) dans l'espace par rapport au courant d'air de processus traversant, au moins un orifice de nettoyage (16) étant agencé au niveau d'une partie supérieure du crible (7) pour amener un liquide de nettoyage (W) sur une surface du crible (7) et le crible (7) étant stationnaire, caractérisé en ce que le conduit d'air de processus (5) présente au moins dans la zone du crible (7) une étendue sensiblement verticale avec un sens d'écoulement essentiellement du haut vers le bas d'un air de processus (L) passant par le conduit d'air de processus (5), de sorte que le liquide de nettoyage appliqué sur le crible peut s'écouler automatiquement.
  2. Appareil de séchage de linge (1) selon la revendication 1, caractérisé en ce que l'au moins un orifice de nettoyage (16) mène à une conduite de liquide (18) et/ou à une chambre d'arrivée (11) du dispositif de nettoyage (9).
  3. Appareil de séchage de linge (1) selon l'une des revendications précédentes, caractérisé en ce que l'au moins un orifice de nettoyage (16) est réalisé en forme de buse (16).
  4. Appareil de séchage de linge (1) selon l'une des revendications précédentes, caractérisé en ce que l'au moins un orifice de nettoyage (16) est orienté à fleur de surface avec la surface du crible (7).
  5. Appareil de séchage de linge (1) selon l'une des revendications précédentes, caractérisé en ce que l'au moins un orifice de nettoyage (16) est orienté avec un angle par rapport à la surface du crible (7).
  6. Appareil de séchage de linge (1) selon l'une des revendications 2 à 5, caractérisé en ce que la conduite de liquide (18) débouche dans une chambre d'arrivée (11) qui est partiellement séparée de l'au moins un orifice de nettoyage (16) par une paroi intermédiaire (14).
  7. Appareil de séchage de linge (1) selon la revendication 6, caractérisé en ce qu'une ouverture de passage (15) pour évacuer de l'eau résiduelle traverse la paroi intermédiaire.
  8. Appareil de séchage de linge (1) selon l'une des revendications précédentes, caractérisé en ce qu'est réalisé, dans une zone inférieure du crible (7), un canal d'évacuation (12) pour l'évacuation du liquide de nettoyage (W*) passant par le crible (7).
  9. Appareil de séchage de linge (1) selon la revendication 8, dans lequel au moins un tronçon du canal d'évacuation (12) adjacent au crible (7) est intégré au crible.
  10. Appareil de séchage de linge (1) selon la revendication 8 ou 9, caractérisé en ce qu'une surface du crible (7) est agencée, dans une zone de passage vers le canal d'évacuation (12), plus haut que ou à fleur avec celui-ci.
  11. Appareil de séchage de linge (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif de nettoyage (9) est intégré dans un flasque, et plus particulièrement un flasque antérieur.
  12. Appareil de séchage de linge (1) selon l'une des revendications précédentes, caractérisé en ce que le crible (7) est intégré au dispositif de nettoyage (9).
  13. Procédé de nettoyage d'un crible stationnaire (7) d'un appareil de séchage de linge (1) comportant un crible (7) pour filtrer des corps (F), et plus particulièrement des peluches, d'un courant d'air de processus traversant un conduit d'air de processus (5) de l'appareil de séchage de linge (1) et comportant un dispositif de nettoyage (9) pour nettoyer le crible (7), le crible (7) étant agencé en oblique en formant un angle (α) dans l'espace par rapport au courant d'air de processus traversant, et un liquide de nettoyage (W) étant amené du haut sur le crible (7) monté en oblique, caractérisé en ce que le conduit d'air de processus (5) présente au moins dans la zone du crible (7) une étendue sensiblement verticale avec un sens d'écoulement essentiellement du haut vers le bas d'un air de processus (L) passant par le conduit d'air de processus (5), de sorte que le liquide de nettoyage appliqué sur le crible s'écoule automatiquement.
  14. Procédé selon la revendication 13, dans lequel le liquide de nettoyage (W) est versé du haut sur le crible (7) monté en oblique.
EP09178896.8A 2008-12-22 2009-12-11 Appareil de séchage de linge et procédé de nettoyage d'un crible Active EP2202349B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008055086A DE102008055086A1 (de) 2008-12-22 2008-12-22 Wäschetrocknungsgerät und Verfahren zum Reinigen eines Siebs

Publications (3)

Publication Number Publication Date
EP2202349A2 EP2202349A2 (fr) 2010-06-30
EP2202349A3 EP2202349A3 (fr) 2015-12-02
EP2202349B1 true EP2202349B1 (fr) 2022-03-16

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US (1) US9885143B2 (fr)
EP (1) EP2202349B1 (fr)
DE (1) DE102008055086A1 (fr)
PL (1) PL2202349T3 (fr)

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US11920288B2 (en) 2017-02-27 2024-03-05 Whirlpool Corporation Heat exchanger filter for self lint cleaning system in dryer appliance

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US9885143B2 (en) 2018-02-06
EP2202349A3 (fr) 2015-12-02
EP2202349A2 (fr) 2010-06-30
US20100154240A1 (en) 2010-06-24
DE102008055086A1 (de) 2010-06-24

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