EP3234255B1 - Appareil de séchage du linge avec système de filtre - Google Patents

Appareil de séchage du linge avec système de filtre Download PDF

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Publication number
EP3234255B1
EP3234255B1 EP14823954.4A EP14823954A EP3234255B1 EP 3234255 B1 EP3234255 B1 EP 3234255B1 EP 14823954 A EP14823954 A EP 14823954A EP 3234255 B1 EP3234255 B1 EP 3234255B1
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EP
European Patent Office
Prior art keywords
filter
nozzle
drying apparatus
laundry drying
liquid
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Application number
EP14823954.4A
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German (de)
English (en)
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EP3234255A1 (fr
Inventor
Nicola Reid
Giuseppe Rossi
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 Appliances AB
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Electrolux Appliances AB
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Publication of EP3234255A1 publication Critical patent/EP3234255A1/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
    • D06F58/10—Drying cabinets or drying chambers having heating or ventilating means
    • 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 

Definitions

  • the invention relates to a laundry drying apparatus, in particular a dryer or washer-dryer.
  • a filter system for filtering lint is arranged upstream of the heat exchanger.
  • This filter system comprises two filter elements mounted at a support frame. The first filter element is a coarse filter filtering coarse lint parts whereas the second filter is filtering fine particles.
  • This filter system shall trap even finest particles in the process drying air flow before this drying air flow is reaching the heat exchanger.
  • the filter system is extractable out of the cabinet of the laundry drying apparatus in order to clean the fine filter from trapped lint.
  • the heat pump dryer of EP 2 386 679 A1 has a lint filter arranged in front of a dehumidifying unit. Flint collected on the front surface of the linter filter can be flushed away by flowing water from a nozzle to the front surface of the lint filter.
  • a laundry drying apparatus in the following description also denoted in brief "apparatus” - comprises a cabinet and a laundry storing compartment arranged within the cabinet.
  • An air channel is arranged within the cabinet and adapted to guide drying air from at least one air outlet of the laundry storing compartment.
  • the air channel is adapted to guide the drying air to at least one air inlet of the laundry storing compartment.
  • the apparatus is providing a closed loop air channel such that the laundry storing compartment and the air channel form a closed loop for circulating the drying air.
  • the apparatus comprises a filter system in order to trap lint removed from laundry during a drying cycle.
  • the filter system is arranged within the air channel downstream the laundry storing compartment.
  • the filter system contains a first lint filter (in brief "first filter”) and a second lint filter (in brief "second filter”).
  • the apparatus comprises a heat exchanger arranged within the air channel and which is adapted to cool the drying air.
  • the filter system is arranged upstream of the heat exchanger.
  • the upstream arrangement means that the filter system is arranged between the laundry storing compartment and the at least one heat exchanger.
  • the heat exchanger arranged in the air channel is an evaporator of a heat pump system of the apparatus and in an alternative embodiment the heat exchanger is a drying air/ambient cooling air heat exchanger of the apparatus which is used e.g. in a condensation dryer for cooling process air.
  • the apparatus comprises a filter wet cleaning unit which has a nozzle for supply liquid in order to wash the first filter.
  • the nozzle is arranged such that the liquid flowing out of the nozzle is directed towards the front surface of the first filter.
  • the filter wet cleaning unit is adapted to preferably provide an automatic filter cleaning thus avoiding or reducing requirement for manual filter cleaning by the user over many drying cycles.
  • the first filter is cleaned or washed very efficiently by directing liquid flowing out of the nozzle towards the front surface of the first filter.
  • the front surface is particularly the side of the first filter where the drying air is entering the first filter. Since lint, fluff and other particles are trapped preferably at the front surface, the first filter can be cleaned/washed efficiently in a very short time using the wet cleaning unit.
  • the nozzle has one or more outlets for supplying liquid.
  • the at least one outlet is arranged above and/or upstream of the first filter. Thus the whole front surface of the first filter is flushed by the cleaning liquid without any additional construction measures.
  • the laundry storing compartment is a drum or a rotatable drum or a drum that is rotatable around a (or a substantially) horizontal axis.
  • the apparatus does not comprise any additional lint filter apart from the filter system.
  • any additional lint filter components to arrange within the cabinet can be avoided.
  • the first filter is configured and arranged relative to the nozzle in such a manner that the second filter is completely or substantially screened or protected from contact with liquid flowing out of the nozzle.
  • a first filter type which is adapted for being wet-cleaned after every drying cycle and a second filter type adapted to provide filtering function over a high number of drying cycles. This supports the efficiency of the cleaning process and the user-friendliness of the filter system.
  • result of screening or shielding of liquid from the second filter by the first filter is that no or essentially no liquid supplied to the first filter can contact the front surface of the second filter.
  • the second filter is wetted by the cleaning liquid and thus needs to be dried - what costs additional drying energy for a laundry cleaning cycle - specifically when the second filter is a sponge (sponge-type), drying would require a long time as the water in the pores would additionally block the drying air flow.
  • the filter system comprises a support structure having a first supporting position and a second supporting position.
  • the first supporting position is adapted to support the first filter
  • the second supporting position is adapted to support the second filter.
  • the support structure is designed such that an air gap is formed between the first filter and second filter when both filters are placed in their supporting positions, i.e. in the first supporting position and in the second supporting position.
  • the air gap is adapted such that the filters do not or essentially do not abut to each other.
  • the gap is dimensioned such that the first filter is adapted to screen or to shield the second filter from contact with liquid flowing out of the nozzle, even in case some of the liquid passes from the front side of the first filter to the rear side of the first filter.
  • the liquid can flow down in the gap without contacting the surface of the second filter.
  • the filters may abut at an edge, for example at the upper edge. However then the gap or clearance is provided at the other or remaining areas. While providing the gap, the filters are preferably arranged in close neighborhood or arranged adjacent to each other such that the filter system is designed in a space-saving manner.
  • the filters are supported by the support structure independently of each other thus providing a user-friendly handling of the filters, e.g. if only one filter shall be detached or changed.
  • the nozzle has at least one of the following features:
  • Such design features of the nozzle support an efficient cleaning of the first filter along its whole filter surface.
  • the air channel of the apparatus comprises a channel opening wherein the first and second filters are removable from the air channel through the channel opening.
  • the cabinet comprises a cabinet opening in such a manner that the first and second filters are removable from the air channel through the channel opening and the cabinet opening.
  • the filters may be removed one after the other.
  • the first and second filters may be provided in a or as a filter unit of the filter system that could be simply removed as a sole/complete unit or component from the air channel.
  • the liquid flowing out of the nozzle of the filter wet cleaning unit and the surface plane of the first filter may have a relative arrangement to each other to improve flushing efficiency.
  • the liquid flowing out of the nozzle has a first direction and the surface plane of the first filter has a second direction, wherein the first and second directions are inclined to each other by an inclination angle.
  • the nozzle is oriented relative to the surface of the first filter such that the liquid flowing out of the nozzle hits or urges the surface of the first filter under an inclination angle.
  • the value of the inclination angle is preferably at or more than 2°, 3°, 5°, 10° or in the range from 1° to 4° or 2° to 5° or 3° to 10°.
  • the filter system and the first and second filters are placed in their respective operational positions in the apparatus such that the nozzle of the filter wet cleaning unit directs the liquid towards the first filter.
  • the second filter is arranged, in relation to the nozzle, behind the first filter in a manner such that the first filter forms a screen adapted to prevent liquid flowing out of the nozzle to reach onto the surface of the second filter.
  • the first filter thus is acting in an additional function as a means for protecting the second filter against unnecessary or disturbing liquid.
  • the apparatus comprises a heat pump system.
  • the heat exchanger is a first heat exchanger and a second heat exchanger is provided for heating the drying air.
  • the filter system could be applied to an apparatus having a heat pump function, in particular a heat pump dryer or heat pump washer-dryer.
  • the filter system comprises at least one filter alignment element.
  • This at least one element is adapted to cooperate with at least one counter-alignment element provided at the filter wet cleaning unit or at the air channel.
  • the elements correspond or mechanically cooperate with each other such that the first filter is positionally aligned with the nozzle of the filter wet cleaning unit.
  • the at least one filter alignment element effects accurate alignment of the filter system within the air channel. Further, this alignment causes automatically the desired relative arrangement between the filter system and the nozzle when the filter system is inserted into the operational position within the air channel. This ensures a correct positioning between the filter system and the nozzle hereby supporting an efficient cleaning of the first filter.
  • the filter system comprises a liquid guiding element adapted to cooperate with the nozzle of the filter wet cleaning unit.
  • the liquid guiding element has a guiding or assisting function by guiding the liquid supplied from the nozzle of the filter wet cleaning unit towards the first filter.
  • the filter system enables the supplied liquid to be effectively distributed across the first filter's surface to be cleaned.
  • the liquid guiding element has simultaneously a functional property to constitute or provide the aforementioned filter alignment element.
  • the liquid guiding element is characterized by at least one of the following features:
  • the liquid guiding element is adapted or designed such that the lateral expansion of the liquid curtain width is achieved as broad as the lateral width of the first filter. Such an expansion further supports uniform and effective liquid distribution over the first filter.
  • the gap (respectively air gap) between the first filter and second filter has at least one of the following features:
  • Such a gap design provides a space-saving arrangement between the first and second filter in their operational position. At the same time, protecting the second filter from liquid cleaning the first filter is realized with low effort.
  • the 'gap width' relates to an average value of the width.
  • the opposing surfaces of the filters between which the gap is formed may be parallel such that the width is constant.
  • the opposing surfaces may be inclined to each other such that a wedge-like gap is formed. Or one or both surfaces may be curved.
  • the first filter has a rear surface which is oriented in air flow direction towards the (front surface of the) second filter.
  • the air gap is dimensioned such that liquid flowing along the rear surface of the first filter is not contacting a front surface of the second filter.
  • This dimension of the air gap is a further advantage measure for protecting the second filter against undesired wetting during cleaning the first filter.
  • the rear surface of the second filter is particularly defined as a surface pointing to the exit direction of drying air flowed through the first filter.
  • the front surface of the second filter is particularly defined as a surface facing the rear surface of the first filter and/or as a surface oriented towards the inflowing air to be filtered by the second filter.
  • the rear surface of the first filter faces the second filter, in particular the front surface of the second filter.
  • the support structure is provided by a filter unit of the filter system.
  • the filter unit preferably comprises a door or lid adapted to close an opening of the air channel of the apparatus.
  • the door or lid By providing the filter unit and (where applicable) the door or lid, the removal of the filters from their operational position is simple and user-friendly. Further the door or lid is adapted to act as alignment element that (additionally) aligns the filters to the correct operational positions of the filters in the air channel. This ensures that the filters are placed in their correct operational position within the air channel thus preventing the drying air (which may contain impurities, lint, etc. from the drying process) to by-pass at least one of the filters and to enter into an undesired space, particularly inside the heat exchanger. Combining the door or lid with the filters offers a mechanical connection such that the whole filter system is insertable or extractable from the apparatus by only one simple user action.
  • the filter unit is adapted to be linearly or in a swinging or rotating movement inserted and extracted from the air channel.
  • the handling of the filter system is further simplified.
  • the filter unit comprises a first filter frame for supporting the first filter and/or a second filter frame or chamber for supporting and receiving the second filter.
  • This construction design facilitates removing or changing the filters separately or individually.
  • the first filter can be understood as a "coarse” filter in the meaning that it removes the main volume or load of the fluff, lint, etc. from the drying air.
  • the second filter has at least one of the following features:
  • the second filter can be understood to be a "fine" filter in the meaning 'adapted to remove' the fine or small particles which passed the first filter or which were not caught by the first filter.
  • first filter or the second filter or the first and second filters have hydrophobic surface properties or characteristics.
  • Inexpensive bulk material can be provided to realize the filters.
  • the bulk material may be any suitable hydrophobic material or may be provided with a surface finish or coating having hydrophobic properties.
  • a first filter has hydrophobic properties adapted to prevent water sticking on the filter surface during cleaning. The hydrophobic property avoids or reduces the first filter becoming wet, which could hinder the drying air to pass freely the first filter and subsequently could reduce the dryer performance.
  • one or more surface planes of the first and second filters are inclined to each other.
  • a useful distance between the first and second filter can be designed (e.g. for realizing an air gap or for protecting the second filter from liquid during a first filter cleaning process).
  • the angle of inclination between the first and second filter or of the first filter relative to the vertical axis is equal to or greater than 2°, 3°, 5°, 10° or is in the range from 1° to 4°, 2° to 5° or 3° to 10°.
  • the support structure of the filter system comprises one or more of the following features:
  • low-cost parts provide a stable structure of the filter system and a stable position of the filter system relative to the air channel.
  • the first filter has a curvature.
  • a first surface of the first filter through which the drying air to be cleaned enters has a curvature.
  • Such a curvature provides sufficient dispersion of the supplied cleaning liquid across the whole first filter surface to be cleaned.
  • the curvature is adapted to compensate potential production tolerances and subsequently potential misalignments between the filter wet cleaning unit (in particular its nozzle) and the first filter.
  • the curvature extends preferably along a vertical section, wherein the plane of this section is perpendicular to the first surface of the first filter.
  • the first surface is opposite the surface of the first filter which is facing the second filter or is pointing towards the incoming drying air flow.
  • the first filter has a first curvature and a second curvature, wherein the first curvature is in a vertical direction and the second curvature is in a horizontal direction.
  • the surface of the first filter has a trough-like or valley-like shape adapted to horizontally concentrate a flow of liquid when the liquid is flowing from an upper region of the first filter to a lower region of the first filter.
  • the first filter is supported by the support structure which comprises a frame or grill for imposing the curvature to the first filter.
  • the support structure which comprises a frame or grill for imposing the curvature to the first filter.
  • a laundry drying apparatus in particular a dryer or a washer-dryer
  • a laundry drying apparatus comprises a cabinet and a laundry storing compartment arranged within the cabinet.
  • a laundry storing compartment and an air channel are arranged within the cabinet.
  • the air channel is adapted to guide drying air from at least one air outlet of the laundry storing compartment.
  • a filter system is arranged within the air channel downstream the laundry storing compartment.
  • the laundry drying apparatus comprises a heat exchanger arranged within the air channel and being adapted to cool the drying air, wherein the filter system is arranged upstream the heat exchanger.
  • the laundry drying apparatus comprises a filter wet cleaning unit having a nozzle for supply liquid for cleaning or washing the filter system.
  • the nozzle is arranged to direct the liquid flowing out of the nozzle towards the front surface of the filter system.
  • the filter system comprises at least one filter alignment element adapted to cooperate with at least one counter-alignment element provided at the filter wet cleaning unit or at the air channel. Making a mechanical cooperation of the at least one filter alignment element and the at least one counter-alignment element the first filter is positionally aligned with the nozzle of the filter wet cleaning unit.
  • the filter system comprises a liquid guiding element adapted to cooperate with the nozzle of the filter wet cleaning unit such as to guide or assisting by guiding the liquid supplied from the nozzle of the filter wet cleaning unit towards the first filter.
  • the at least one filter alignment element is adapted to align accurately the filter system and subsequently the first filter relative to the nozzle when the filter system is inserted into the operational position within or at the air channel.
  • the at least one filter alignment element may be arranged at the filter system in combination with the liquid guiding element.
  • the liquid guiding element may have at the same time functional properties of being a filter alignment element.
  • any feature of any laundry drying apparatus and/or filter system disclosed in the claims and/or the description and/or the figures may be applied to this laundry drying apparatus (having a filter alignment element or liquid guiding element) individually or in any arbitrary combination or sub-combination.
  • a filter system for a laundry drying apparatus comprises a first lint filter (first filter) and a second lint filter (second filter). Further this filter system comprises a support structure having a first supporting position adapted to support the first filter and a second supporting position adapted to support the second filter.
  • first and second filters are placed in the first and second supporting positions (first and second filter positions), respectively, the first and second filters are neighboring to each other or arranged adjacent to each other.
  • the first filter is adapted to be washed or cleaned by liquid.
  • an air gap is formed between the first filter and second filter.
  • first, second and/or third aspects of the invention can be mutually combined with any of the first, second or third aspect and any of the first, second or third aspects can be combined with individual features or sub-combinations of features of any of the below detailed embodiments.
  • Fig. 1 shows schematically depicted a laundry drying apparatus 2 which in brief is denoted “apparatus” and is a heat pump tumble dryer in this embodiment.
  • the tumble dryer 2 comprises a partly and schematically depicted cabinet 3 which supports or encloses components and parts exemplarily described hereinafter.
  • the cabinet 3 encloses a heat pump system 4, including a closed refrigerant loop 6 which comprises in the following order of refrigerant flow B: a first heat exchanger 10 acting as evaporator for evaporating the refrigerant and cooling drying air, a compressor 14, a second heat exchanger 12 acting as condenser for cooling the refrigerant and heating the drying air, and an expansion device 16 from where the refrigerant is returned to the first heat exchanger 10.
  • the heat pump system 4 forms the refrigerant loop 6 through which the refrigerant is circulated by the compressor 14 as indicated by arrow B.
  • the drying air flow A within the apparatus 2 is guided through a compartment 18 of the home appliance 2, i.e. through a compartment for receiving articles to be treated, e.g. a drum 18.
  • the articles to be treated are laundry 19, textiles or the like.
  • the drying air flow is indicated by arrows A in Fig. 1 and is driven by a drying air blower 8.
  • a drying air channel 20 guides the drying air flow A outside the drum 18 and includes different sections, including the section forming a battery channel 20a in which the first and second heat exchangers 10, 12 are arranged.
  • the drying air exiting the second heat exchanger 12 flows into a rear channel 20b in which the drying air blower 8 is arranged.
  • the air conveyed by the blower 8 is guided upward in a rising channel 20c to the backside of the drum 18 which has one or more drum inlets 26for the drying air.
  • the air is exiting the drum 18 through the drum outlet 28 (which corresponds to the loading opening 21 of the drum 18, wherein during drying operation the loading opening 21 is covered by a loading door 24) is optionally filtered by an optional fluff filter 22 arranged close to the drum outlet 28, e.g. in or at the channel 20.
  • the optional fluff filter 22 is arranged in a front channel 20d forming another section of the channel 20 which is arranged behind and adjacent the front cover of the apparatus 2.
  • the condensate formed at the first heat exchanger 10 is collected and guided to a condensate collector 30 which is connected to an extractable condensate drawer 40 via a drain pipe 46, a drain pump 36 and a drawer pipe 50. I.e. the collected condensate can be pumped from the collector 30 to the drawer 40 which is arranged at an upper portion of the apparatus 2 from where it can be comfortably withdrawn and emptied by a user.
  • a filter system 52 is arranged in the cabinet 3 of the apparatus 2 to catch lint, fluff and other particles from the drying air before this drying air enters the first heat exchanger 10.
  • the filter system 52 is arranged within the air channel 20 downstream the drum 18 and upstream the first heat exchanger 10.
  • the filter system 52 is arranged in the basement 5 which is arranged at a bottom region of the apparatus 2.
  • Fig. 2 shows some elements of the filter system 52. It comprises a first lint filter 54 and a second lint filter 56.
  • the filter system 52 comprises a support structure 58 for supporting the filters 52, 54.
  • the support structure 58 comprises a rectangular first filter frame 60 having a first supporting position for supporting the first filter 54.
  • the support structure 58 further comprises a rectangular second filter frame 62 having a second supporting position adapted to support the second filter 56.
  • the drying air flow A first enters a front surface 64 of the first filter 54 whereas a rear surface 66 of the first filter 54 is directed towards or is facing the second filter 56 ( Fig. 3a, Fig. 3b).
  • Fig. 3b shows the first and second filters 54, 56 placed in their first supporting position and second supporting position, respectively, wherein the positions are such that an air gap 68 is formed between the first filter 54 and second filter 56.
  • the air gap 68 is approximately wedge-shaped.
  • the width of the air gap 68 along the lateral direction 96 is dimensioned preferably at least 1.5 mm, 2 mm, 4 mm or 5 mm. in the embodiment shown the width is a maximum width of the wedge-shaped gap at the lower end.
  • the gap width between the filters may be constant or variable within e.g. less than 80%, 60% or 30% variation from a mean gap width.
  • the first filter frame 60 is carrying a grill 63 or grid which is adapted to keep the first filter 54 in a desired surface form, e.g. a flat plane in this embodiment.
  • a desired surface form e.g. a flat plane in this embodiment.
  • the surface plane is spanned by a horizontal direction 75 and a surface direction 77.
  • Fig. 3b and Fig. 4 show that the first and second supporting positions of the first and second filters 54, 56 are aligned such that when the first and second filters 54, 56 are in their respective operational positions, the first filter 54 and the second filter 56 are oriented inclined to each other. Additionally, the first filter 54 is inclined relative to a vertical axis 110 of the support structure 58 extending in parallel to the vertical direction 76 or in parallel to a vertical plane of the support structure 58.
  • the angle 112 of inclination between the first filter 54 and second filter 56 and of the first filter 54 relative to the vertical axis 110 is preferably equal to or greater than 2°, 3°, 5°, 10° or is preferably in the range from 1° to 4°, 2° to 5° or 3° to 10°.
  • the apparatus 2 comprises a filter wet cleaning unit 70 as shown in Fig. 4 .
  • This wet cleaning unit 70 has a nozzle 72 for supplying liquid for washing the first filter 54.
  • the nozzle 72 is arranged to direct the liquid flowing out of the nozzle 72 towards the front surface 64 of the first filter 54.
  • the first filter 54 is configured and arranged relative to the nozzle 72 to (at least substantially) screen or protect the second filter 56 from undesired contact with liquid flowing out of the nozzle 72.
  • the nozzle 72 is dimensioned and adapted to distribute the liquid over or essentially over the full horizontal width 74 of the front surface 64 of the first filter 54 ( Fig. 3a ).
  • the horizontal width 74 extends parallel to a horizontal direction 75, whereas the horizontal direction 75 extends perpendicular to the vertical direction 76.
  • a surface direction 77 of the first filter 54 is inclined relative to the vertical direction 76.
  • the horizontal direction 75 and the surface direction 77 span the surface plane of the first filter 54, particularly its front surface 64.
  • the nozzle 72 is arranged at or within the air channel 20 relative to the first filter 54 such as to supply the liquid to an upper region 80 and preferably to the top front edge of the first filter 54.
  • one nozzle outlet 78 is shown.
  • the nozzle 72 may have two, three or more nozzle outlets 78 which are preferably arranged distributed and spaced along the horizontal direction 75.
  • the at least one nozzle outlet 78 is adapted to direct the liquid towards the first filter 54.
  • the at least one nozzle outlet 78 is an elongated outlet having an elongated extension along the horizontal direction 75 and particularly in parallel to the front surface 64 of the first filter 54.
  • the liquid is flowing out of the nozzle 72 along a flow direction 82 which is particularly in parallel to the vertical direction 76 ( Fig. 4 ).
  • the front surface 64 of the first filter 54 extends in surface direction 77.
  • the flow direction 82 and the surface direction 82 are inclined to each other by an inclination angle 84.
  • the nozzle 72 is oriented relative to the front surface 64 of the first filter 54 such that the liquid flowing out of the nozzle 72 hits the front surface 64 of the first filter 54 approximately under the inclination angle 84.
  • the inclination angle is about 3°.
  • the liquid flowing out of the nozzle 72 according to the embodiment in Fig. 5 hits the front surface 64 of the first filter 54 under a greater inclination angle 85 than the inclination angle 84 due to a liquid guiding element 86 to be explained in more detail below.
  • the filter system 52 and the filters 54, 56 are placed in their respective operational positions within the apparatus (not shown in detail here).
  • the nozzle 72 of the filter wet cleaning unit 70, the first filter 54 and the second filter 56 are arranged such that the first filter 54, in particular its front surface 64, forms a screen adapted to prevent liquid flowing out of the nozzle 72 to reach onto the surface of the second filter 56.
  • the air gap 68 is dimensioned such that liquid flowing along the rear surface 66 of the first filter 54 is not contacting a front surface 57 of the second filter 56 ( Fig. 3b , Fig. 4 ).
  • Fig. 5 shows in cross section a wedge-like filter alignment element 88 being part of the filter system 52.
  • This element 88 interacts with a nozzle wall section 90 in the region of its nozzle outlet 78.
  • the wall section 90 is acting as a counter-alignment and/or abutting element.
  • the mechanical cooperation of the wall section 90 and the filter alignment element 88 enables the first filter 54 to be positionally aligned with the nozzle 72.
  • the filter system 52 and subsequently the first filter 54 to be cleaned is accurately positioned with respect to the nozzle outlet 78 by effecting a positioning mechanical contact between the filter alignment element 88 and the counter-alignment element 90.
  • the counter-alignment element 90 is replaced or supplemented by parts of the wet cleaning unit 70 or the drying air channel 20, e.g. like one or more rest or stopping elements.
  • the embodiment of the filter alignment element 88 according to Fig. 5 is acting at the same time as a liquid guiding element 86 (mentioned above).
  • This element 86 is adapted to cooperate with the nozzle 72 such that the element 86 has a guiding or assisting function by guiding the liquid supplied from the nozzle outlet 78 towards the first filter 54.
  • the filter system 52 comprises at least one filter alignment element 88 and a separate liquid guiding element 86.
  • the design or shape of the liquid guiding element 86 is adapted to achieve an efficient distribution of the liquid across the front surface 64 to clean the first filter 54 from top to bottom.
  • the liquid guiding element has an elongated vane shape ( Fig. 6, Fig. 7 ).
  • the liquid guiding element 86 is adapted to laterally expand the width of the nozzle 72 such that the lateral width (which extends along a lateral direction 96) of a liquid curtain exiting the nozzle outlet 78 is expanded in lateral width thus enabling a uniform cleaning of the first filter 54, preferably along its complete lateral width along the lateral direction 96.
  • the liquid guiding element 86 has a liquid guiding surface 92 which is inclined relative to the flow direction 82 or vertical direction 76 ( Fig. 5 , Fig. 6, Fig. 7 ).
  • the liquid guiding element 86 is inclined towards the front surface 64 of the first filter 54 in a vertical downward direction.
  • a gap 94 is achieved between the front surface 64 of the first filter 54 and the liquid guiding element 86.
  • This gap 94 can be regarded as an extension of the nozzle 72 or its nozzle outlet 78.
  • the gap 94 and the liquid guiding element 86 are arranged upstream the first filter 54 with respect to the drying air flow A.
  • Fig. 6 and Fig. 7 show the liquid guiding element 86 and the filter alignment element 88 (already known from Fig. 5 ) in a perspective view.
  • This element 86, 88 is arranged at the support structure 58, wherein in Fig. 6 and Fig. 7 only the first filter 54 is shown.
  • the first filter 54 is preferably a thin (e.g. thickness of or less than 1 mm, 0.8 mm, 0.5 mm or 0.3 mm) mesh-type filter whereas the second filter 56 is substantially thicker (e.g. thickness in the range of 3 to 20 mm, 3 to 5 mm, 4 to 8 mm, 6 to 10 mm or 8 to 20 mm) than the first filter 54.
  • the second filter 56 is a non-woven type filter (e.g. foam material, PU foam).
  • the wet cleaning unit 70 may be controlled by a controller of the dryer (not shown) such that the first filter 54 is automatically washed/cleaned at a defined time and/or predefined periods, preferably and/or after every drying cycle.
  • the second filter 56 is not washed by the wet cleaning unit 70 but its material and form structure is adapted to collect fine particles by the second filter 56 for long periods of dryer operation time, i.e. over many drying cycles, before it is necessary to replace/change or clean the second filter 56 by the user.
  • This concept of a filter system 52 relieves the user from the burden to clean lint filters after every drying cycle and at the same time offers a constant drying performance, energy consumption and cycle duration, primarily by preventing a degradation of the heat exchange efficiency of the first heat exchanger by preventing fluff deposition.
  • Fig. 8 shows the bottom region of the apparatus 2 having the basement 5 where the filter system 52 is inserted in its operational position.
  • the air channel 20 comprises a channel opening 98 which can be closed by inserting the filter system 52 in its operational position ( Fig. 1 , Fig. 8, Fig. 9 ).
  • the support structure 58 has a filter unit 59 which comprises a door 100 or lid adapted to close the channel opening 98.
  • Fig. 10a shows the apparatus 2 with the filter system 52 inserted in its operational position.
  • the door 100 of the filter system 52 is arranged adjacent to a cabinet opening 102 (air channel opening).
  • the door 100 and the cabinet opening 102 are covered by a pivotable cabinet door 104 shown in Fig. 10a in the opened position.
  • Fig. 10b shows the filter unit 59 according to Fig. 10a but being in a partially extracted position relative to the air channel 20.
  • the air channel 20 is opened at the channel opening 98.
  • the filter unit 59 can be extracted and again be inserted by a swing-like movement or a rotational movement.
  • Fig. 10c shows a further embodiment, according to which the filter unit 59 is extracted from the air channel 20 by making a linear movement. Insertion of this filter unit 59 into the channel opening 98 is again made by a linear movement.
  • the door 100 being part of the filter unit 59 (more generally of the support structure 58) provides a user-friendly handling of the filter system 52.
  • the filter system 52 is insertable into the air channel 20 and extractable therefrom by simply handling it at the door 100.
  • the door 100 comprises a latch 106 which is pivotably mounted at the door and movable by a handle 108 ( Fig. 11 , Fig. 13 , Fig. 14 ).
  • a handle 108 Fig. 11 , Fig. 13 , Fig. 14
  • the latch 106 will be rotated into a respective position relative to the cabinet 3 thus securing the filter system 52 in or at the air channel 20.
  • Fig. 11 shows the support structure 58 carrying two sealing elements 114.
  • these sealing elements 114 are adapted to provide the tightness of the channel opening 98 and other parts of the apparatus 2.
  • the front seal 114 seals between door 100 and basement and thus the channel 20 from the ambient air of the dryer.
  • the rear seal prevents lint from bypassing the filters within the air channel 20.
  • Fig. 12 shows that the bottom region of the support structure 58 comprises an elongated, approximately rectangular hole 116.
  • This hole 116 provides a passage for the supplied liquid to drop or flow down into a liquid chamber of the basement 5 below the filter structure 58.
  • Fig. 13 shows a deflecting wall 118 being part of the support structure 58.
  • the curved surface of the wall 118 supports guiding the drying air towards the first heat exchanger 10 and thereby reducing the flow resistance. Additionally the wall 118 guides the supplied liquid towards the hole 116 for draining the liquid out of channel 20.
  • FIG. 14 to Fig. 16 show clamping arrangements for securing the first filter 54 and the second filter 56 in the respective operational position at the support structure 58 and within the filter system 52.
  • a first clamping arrangement comprises two parallel side elements 120 which are mounted at a rear side of the door 100 ( Fig. 14 ). Each of the rear edges of the side elements 120 cooperate and/or mate with a respective slot-like recess 122.
  • the recesses 122 are arranged at the first filter frame 60.
  • first filter frame 60 comprises one or more snap-in elements 124 (e.g. detents, studs, bolts, recesses) mating or cooperating with respective one or more counter-elements (e.g. at least one groove, recess or hole, pins, bolts) arranged at the second filter frame 62 (not shown in detail).
  • snap-in elements 124 e.g. detents, studs, bolts, recesses
  • counter-elements e.g. at least one groove, recess or hole, pins, bolts
  • the clamping functions explained according to Fig. 14 to Fig. 16 may be implemented by at least one latch or clip or any other appropriate element.
  • Fig. 17 shows a further embodiment of the first filter 54.
  • the front surface 64 and consequently the first filter 54 have a curvature 126.
  • the cross section of the curvature 126 extends particularly along the vertical direction 76.
  • the first filter 54 may have a first curvature and a second curvature, wherein the first curvature extends along the vertical direction 76 and the second curvature extends along the horizontal direction 75.
  • the first filter 54 may have a trough-like or valley-like shape or curvature. This trough-like or valley-like shape is preferably adapted to horizontally concentrate a flow of liquid when the liquid is flowing from an upper region 80 of the first filter 54 to a lower region 81 of this filter 54.
  • the first filter 54 is supported by the support structure 58 comprising a curved first filter frame 60 and a grill 63 comprising curved ribs 128.
  • the curved frame 60 and the curved ribs 128 impose the curvature 126 to the first filter 54. This may be easily realized when the first filter 54 has flexible properties.
  • the support structure 58 according to Fig. 17 is adapted to support also the second filter 56.
  • Fig. 18 shows the embodiment of the filter system 52 according to Fig. 17 being in its operational position, i.e. in its inserted position within the basement 5 of the apparatus 2.
  • the filter system 52 is manually extractable out of the basement 5 and can be inserted back therein.
  • Reference Numeral List 2 tumble dryer 22 filter element 3 cabinet 24 loading door 4 heat pump system 26 drum inlet 5 basement 28 drum outlet 6 refrigerant loop 30 condensate collector 8 blower 36 drain pump 10 first heat exchanger 40 condensate container 12 second heat exchanger 46 drain pipe 14 compressor 50 drawer pipe 16 expansion device 52 filter system 18 drum 54 first lint filter 19 laundry 56 second lint filter 20 drying air channel 57 front surface of second filter 20a battery channel 58 support structure 20b rear channel 59 filter unit 20c rising channel 60 first filter frame 20d front channel 62 second filter frame 21 loading opening 63 grill 64 front surface of first filter 96 lateral direction 66 rear surface of first filter 98 channel opening 68 air gap 100 door 70 filter wet cleaning unit 102 cabinet opening 72 nozzle 104 cabinet door 74 horizontal width 106 latch 75 horizontal direction 108 handle 76 vertical direction 110 vertical axis 77 surface direction 112 angle of filter inclination 78 nozzle outlet 114 sealing element 80 upper region of first filter 116 hole 81 lower region of first filter 118 deflecting

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Claims (25)

  1. Appareil de séchage de linge, en particulier un sèche-linge ou lave-linge/sèche-linge (2), comprenant:
    une armoire (3),
    un compartiment de stockage de linge (18) disposé à l'intérieur de l'armoire (3),
    un conduit d'air (20) disposé à l'intérieur de l'armoire (3) et adapté pour guider l'air de séchage dans un flux d'air de séchage (A) depuis au moins une sortie d'air (28) du compartiment de stockage de linge (18) vers au moins une entrée d'air (26) du compartiment de stockage de linge (18),
    un échangeur de chaleur (10) disposé dans le conduit d'air (20) et adapté pour refroidir l'air de séchage,
    un système de filtre (52) disposé dans le conduit d'air (20) en aval du compartiment de stockage de linge (18) et en amont de l'échangeur de chaleur (10), le système de filtre (52) comprenant un premier filtre à peluches (54), et
    une unité de nettoyage humide de filtre (70) comportant une buse (72) servant à délivrer un liquide d'alimentation pour laver le premier filtre (54),
    la buse (72) étant disposée de façon à diriger le liquide s'écoulant hors de la buse (72) vers une surface avant (64) du premier filtre (54);
    caractérisé en ce que
    le système de filtre (52) comprend en outre un second filtre à peluches (56), dans lequel, lorsque le système de filtre (52) est disposé dans le conduit d'air (20), le premier filtre à peluches (54) est disposé en amont du second filtre à peluches (56), et
    le premier filtre (54) est configuré et agencé par rapport à la buse (72) pour empêcher ou pour sensiblement empêcher le second filtre (56) d'entrer en contact avec le liquide s'écoulant hors de la buse (72), de sorte qu'aucun ou sensiblement aucun liquide fourni au premier filtre (54) ne peut venir en contact avec la surface avant du second filtre (56).
  2. Appareil de séchage de linge selon la revendication 1, dans lequel le système de filtre (52) comprend une structure de support (58, 59) ayant une première position de support adaptée pour supporter le premier filtre (54) et une seconde position de support adaptée pour supporter le second filtre (56), dans lequel, lorsque les premier et second filtres (54, 56) sont placés dans les première et seconde positions, un écartement (68) est formé entre le premier (54) et second filtre (56).
  3. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel la buse (72) est caractérisée par une ou plusieurs des caractéristiques suivantes:
    la buse est adaptée pour distribuer le liquide sur ou essentiellement sur la largeur horizontale (74) de la surface avant (64) du premier filtre (54),
    la buse est disposée au niveau ou à l'intérieur du conduit d'air (20) par rapport au premier filtre (54) de manière à fournir le liquide à une région supérieure (80) du premier filtre (54),
    la buse a une, deux, trois ou plusieurs sorties (78) adaptées pour diriger le liquide vers le premier filtre (54), et
    la buse a au moins une sortie allongée (78) ayant l'extension allongée parallèlement à la première surface de filtre (64).
  4. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel le conduit d'air (20) comprend une ouverture de conduit (98) et les premier et second filtres (54, 56) sont conçus de manière à pouvoir être enlevés du conduit d'air (20) par l'ouverture de conduit (98).
  5. Appareil de séchage de linge selon l'une quelconque des revendications précédentes,
    dans lequel le liquide s'écoulant hors de la buse (72) de l'unité de nettoyage humide de filtre (70) a une première direction (82) et le plan de surface du premier filtre (54) a une seconde direction (77), les première et seconde directions (77, 82) étant inclinées l'une par rapport à l'autre selon un angle d'inclinaison (84), ou
    la buse (72) étant orientée par rapport à la surface (64) du premier filtre (54) de telle sorte que le liquide s'écoulant hors de la buse (72) entre en contact avec la surface (64) du premier filtre (54) sous un angle d'inclinaison (85),
    l'angle d'inclinaison (84, 85) étant de préférence égal ou supérieur à 2°, 3°, 5°, 10° ou dans la plage de 1° à 4°, 2° à 5° ou 3° à 10°.
  6. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel, lorsque le système de filtre (52) et les premier et second filtres (54, 56) sont placés dans leurs positions de fonctionnement respectives dans l'appareil de séchage de linge (2), la buse (72) de l'unité de nettoyage humide de filtre (70), le premier filtre (54) et le second filtre (56) sont disposés de sorte que le premier filtre (54) forme un tamis adapté pour empêcher le liquide s'écoulant hors de la buse (72) d'atteindre la surface (57) du second filtre (56).
  7. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, comprenant en outre un système de pompe à chaleur (4) comprenant l'échangeur de chaleur comme premier échangeur de chaleur (10) et un second échangeur de chaleur (12) pour chauffer l'air de séchage.
  8. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel le système de filtre (52) comprend au moins un élément d'alignement de filtre (88) adapté pour coopérer avec au moins un élément de contre-alignement (90) prévu sur l'unité de nettoyage humide de filtre (70, 72) ou sur le conduit d'air (20), le premier filtre (54) étant, par coopération mécanique de l'au moins un élément d'alignement de filtre (88) et de l'au moins un élément de contre-alignement (90), aligné en position avec la buse (72) de l'unité de nettoyage humide (70) ou réglé en position par rapport à celle-ci.
  9. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel le système de filtre (52) comprend un élément de guidage de liquide (86) adapté pour coopérer avec la buse (72) de l'unité de nettoyage humide (70) et est adapté pour guider ou pour aider à guider le liquide fourni par la buse (72) de l'unité de nettoyage humide (70) vers le premier filtre (54).
  10. Appareil de séchage de linge selon la revendication 9, dans lequel l'élément de guidage de liquide (86) est caractérisé par une ou plusieurs des propriétés suivantes:
    présente une forme d'aube allongée,
    est adapté pour étendre latéralement la largeur de la buse (72) de telle sorte que la largeur latérale d'un rideau de liquide sortant de la buse (72) est étendue en largeur latérale (96),
    présente une surface de guidage de liquide (92) qui est inclinée vers la surface (64) du premier filtre (54) dans une direction verticale descendante (76),
    l'élément de guidage de liquide (86) est agencé par rapport au premier filtre (54) de telle sorte qu'il existe un espace (94) entre la première surface (64) du premier filtre (54) et l'élément de guidage de liquide (86),
    fait partie de la buse (72), et
    est disposé en amont du premier filtre (54) par rapport à l'écoulement d'air de séchage (A).
  11. Appareil de séchage de linge selon l'une quelconque des revendications précédentes et la revendication 2, dans lequel l'écartement (68) ou la valeur moyenne de l'écartement ou l'écartement minimal entre le premier (54) et le second filtre (56) est caractérisé par une ou plusieurs des propriétés suivantes:
    la largeur de l'écartement est d'au moins 1,5 mm, 2 mm, 4 mm ou 5 mm, et
    l'écartement (68) est en forme de coin.
  12. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel le premier filtre (54) présente une surface arrière (66) qui, par rapport à l'écoulement d'air de séchage (A), est orientée vers la surface avant du second filtre (56) et dans lequel un ou l'écartement (68) entre les filtres est dimensionné de telle sorte que le liquide qui circule le long de la surface arrière (66) du premier filtre (54) ne touche pas la surface avant (57) du second filtre (56).
  13. Appareil de séchage de linge selon la revendication 2 ou l'une quelconque des revendications précédentes 3 à 12, lorsqu'elles dépendent également de la revendication 2, dans lequel la structure de support (58) est prévue par une unité de filtre (59) du système de filtre (52).
  14. Appareil de séchage de linge selon la revendication 13, dans lequel l'unité de filtration (59) comprend une porte (100) ou un couvercle adapté pour fermer une ouverture (98) du conduit d'air (20) de l'appareil de séchage de linge (2).
  15. Appareil de séchage de linge selon la revendication 13 ou 14, dans lequel l'unité de filtre (59) est adaptée pour être insérée et extraite du conduit d'air (20) de manière linéaire ou dans un mouvement de pivotement.
  16. Appareil de séchage de linge selon l'une quelconque des revendications 13 à 15, dans lequel l'unité de filtre (59) comprend au moins l'un parmi les deux éléments suivants
    - un premier cadre de filtre (60) pour supporter le premier filtre (54), et
    - un second cadre de filtre (62) ou un réceptacle ou une chambre pour supporter et recevoir le second filtre (56).
  17. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel le premier filtre (54) est caractérisé par une ou plusieurs des caractéristiques suivantes:
    est un filtre de type maillé,
    est un filtre tissé,
    est un filtre plat ou un filtre à tamis,
    est formé de fils ayant un diamètre compris entre 50 et 150 µm, entre 70 et 160 µm, entre 80 et 145 µm, ou entre 100 et 300 µm,
    présente une largeur d'ouverture de maille comprise entre 50 et 175 µm, 80 et 200 µm, 100 et 250 µm, 120 et 185 µm, ou 150 et 350 µm, et
    présente une épaisseur égale ou inférieure à 1, 0,8, 0,5 ou 0,3 mm.
  18. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel le second filtre (56) est caractérisé par une ou plusieurs des caractéristiques suivantes:
    est un filtre à milieu poreux,
    est un filtre de type éponge ou mousse,
    est un filtre non tissé,
    est en mousse de PU,
    présente une épaisseur comprise entre 3 et 20 mm, 3 et 5 mm, 4 et 8 mm, 6 et 10 mm ou 8 et 20 mm,
    présente une taille de pores comprise entre 400 et 1 200 µm,
    présente une masse volumique comprise entre 5 et 60 kg/m3, 10 et 50 kg/m3, 20 et 30 kg/m3, 30 et 40 kg/m3 ou 15 et 25 kg/m3, et
    présente une densité de pores par pouce dans la plage de 10 à 60, 20 à 40 ou 15 à 25 PPI.
  19. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel le premier filtre (54), le second filtre (56) ou les premier et second filtres (54, 56) ont des caractéristiques de surface hydrophobes.
  20. Appareil de séchage de linge selon la revendication 2 ou selon l'une quelconque des revendications précédentes 3 à 19, lorsqu'elles dépendent également de la revendication 2,
    dans lequel, dans la structure de support (58) du système de filtre (52), les première et seconde positions de support sont alignées de telle sorte que, lorsque le premier filtre (54) et le second filtre (56) sont dans leurs positions de fonctionnement respectives, les premier et second filtres (54, 56) sont orientés inclinés l'un par rapport à l'autre, ou
    dans lequel, dans la structure de support (58) du système de filtre (52), la première position de support est alignée de telle sorte que, lorsque le premier filtre (54) est dans sa position de fonctionnement, le premier filtre (54) est incliné par rapport à l'axe vertical (110), où l'axe vertical (110) est aligné avec la direction de la gravité.
  21. Appareil de séchage de linge selon la revendication 20, dans lequel un angle d'inclinaison (112) entre le premier (54) et le second filtre (56) ou du premier filtre (54) par rapport à l'axe vertical (110) est égal ou supérieur à 2°, 3°, 5°, 10° ou est compris entre 1° et 4°, 2° et 5° ou 3° et 10°.
  22. Appareil de séchage de linge selon la revendication 2 ou selon l'une quelconque des revendications précédentes 3 à 21, lorsqu'elles dépendent également de la revendication 2, dans lequel la structure de support (58) du système de filtre (52) comprend un ou plusieurs parmi:
    au moins un verrou ou une pince ou au moins un dispositif de serrage (120, 122; 124) pour fixer le premier filtre (54), le second filtre (56) ou le premier (54) et le second filtre (56) dans la position de fonctionnement respective dans le système de filtre (52), et
    au moins un verrou (106), une pince ou une encoche pour fixer le système de filtre (52) dans ou sur le conduit d'air (20) de l'appareil de séchage de linge (2).
  23. Appareil de séchage de linge selon l'une quelconque des revendications précédentes, dans lequel
    (a) le premier filtre (54) a une courbure (126) ou la surface avant (64) du premier filtre (54) par laquelle entre l'air de séchage à nettoyer ayant une courbure (126), ou
    (b) le premier filtre (54) a une première et une seconde courbure, la première courbure (126) étant dans une direction verticale (76) et la seconde courbure étant dans une direction horizontale (75).
  24. Appareil de séchage de linge selon l'option (a) de la revendication 23, dans lequel la surface avant (64) du premier filtre (54) a une forme en creux ou concave adaptée pour concentrer horizontalement un écoulement de liquide lorsque le liquide s'écoule d'une région supérieure (80) du premier filtre (54) vers une région inférieure (81) du filtre (54).
  25. Appareil de séchage de linge selon la revendication 23 ou 24, lorsqu'elles dépendent également selon la revendication 2, dans lequel le premier filtre (54) est supporté par la structure de support (58) comprenant un cadre ou une grille (63, 128) qui impose la courbure (126) au premier filtre (54).
EP14823954.4A 2014-12-16 2014-12-16 Appareil de séchage du linge avec système de filtre Active EP3234255B1 (fr)

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CN (1) CN107002343B (fr)
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Publication number Publication date
CN107002343B (zh) 2020-03-10
AU2014414436A1 (en) 2017-05-18
WO2016095970A1 (fr) 2016-06-23
EP3234255A1 (fr) 2017-10-25
AU2014414436B2 (en) 2020-06-25
CN107002343A (zh) 2017-08-01

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