EP2511414A1 - Filtration system for laundry dryer - Google Patents
Filtration system for laundry dryer Download PDFInfo
- Publication number
- EP2511414A1 EP2511414A1 EP11425106A EP11425106A EP2511414A1 EP 2511414 A1 EP2511414 A1 EP 2511414A1 EP 11425106 A EP11425106 A EP 11425106A EP 11425106 A EP11425106 A EP 11425106A EP 2511414 A1 EP2511414 A1 EP 2511414A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- flow
- laundry
- opening
- filter
- 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.)
- Granted
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 26
- 238000001035 drying Methods 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 description 7
- 238000007689 inspection Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Images
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 dryersÂ
- 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 dryersÂ
- D06F58/24—Condensing arrangements
Definitions
- the heating device 18 conventionally consists of an electrical resistor.
- the channels 23 for the drying air flow extend transverse, preferably perpendicular to the direction of the channels 13.
- each of the sections 12A and 12B of the condenser 12 has a rectangular parallelepiped shape and the niche 24 has a corresponding volumetric conformation, of slightly larger size, to allow insertion and removal of the individual sections 12A and 12B, or at least the first section 12A as well as proper positioning to ensure continuity of the channels 13.
- the provision of the filtering bodies 33 and 34 on opposed portions of the contour of the tubular recess 3A of the opening 8, with respective channels 38 and 39 for the flow facilitates circulation of the air flow as the rotation of the drum 7 is reversed. This is because, depending on the direction of rotation of the drum, the drying air will preferentially flow into one or the other of the channels 38 and 39, and hence through the filtering body 33 or the one referenced 34, with doubtless advantages in terms of energy efficiency of the machine.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
Description
- The present invention relates to a laundry dryer machine, wherein a flow of drying air is circulated through a path, which comprises a fan for moving said flow, a motor for driving said fan, at least one filter for filtering the flow, a drum for containing the laundry to be dried, a condenser with a plurality of channels for the flow of drying air, for removing the moisture absorbed by the flow through the laundry in the drum, a container for collecting the condensate removed from the flow of drying air, a box-like structure for containing the components of the machine, said structure having a base, a top surface, a front vertical wall, a back vertical wall and corresponding lateral vertical walls, an opening formed in said front vertical wall for loading the laundry to be dried and removing it at the end of the drying process, a door adapted to assume an open position and a closed position to open and close said opening for loading and removing laundry, a conduit for conveying a flow of cooling air to the condenser, said conduit having a fan, a motor for driving it, as well as a first air intake opening and a second air exhaust opening, both openings communicating with the environment outside the machine.
- Laundry dryer machines as described above are known in the art, examples thereof being disclosed in
EP 1,990,464 andEP 1,925,713 . - According to the prior art, the filter, namely the filtration system which is required to at least partially remove the material released from the laundry during the drying process, e.g. lint of various natures, from the flow of drying air, is located near the basement of the containing structure of the machine, proximate the condensate tray.
- The configuration and position of the filter for the flow of drying air according to the prior art involves certain drawbacks, some of which affect the energy efficiency of the machine, and others have effects on the manufacturing costs of the machine.
- The position of the filter near the base of the machine requires the provision of at least one opening with a door whose size conforms to the size of the filter, to allow inspection and removal for the required periodical revision and cleaning. The provision of an opening and a door patently involves an increase of the manufacturing costs for the containing structure of the machine.
- Furthermore, since the filter can be only accessed after opening the door provided therefor, the user will likely be reluctant to perform the required periodic cleaning procedures.
- This will cause the build-up of deposits on the filtering walls, which will slow down the flow of drying air, thereby causing a loss in the overall energy efficiency of the machine and will possibly expose the machine to operational failures, whose repair would require specially skilled maintenance personnel, with consequent cost increases.
- Therefore, the object of the present invention is to modify the filtration system for filtering the flow of drying air of a laundry dryer machine, to allow removal thereof for cleaning without providing the machine with a special inspection opening and corresponding door.
- A further object is to improve the overall energy efficiency of the machine. These objects are fulfilled by a laundry dryer machine as defined in the characteristics of
claim 1 hereinafter, which shall be intended to be integrated herein by reference. - The characteristics and advantages of the present invention will appear more clearly from the following detailed description of a few practical embodiments, illustrated by way of non-limiting examples in the annexed drawings, in which:
-
Figure 1 is a front schematic and partially vertically sectional view of the laundry dryer machine of the invention, according to a first embodiment thereof; -
Figure 2 is a vertically sectional view of the machine, as taken along the line II-II ofFigure 1 ; -
Figure 3 is an enlarged schematic view of the vertical section ofFigure 2 , showing the body of the condenser and the door for access to the drying drum; -
Figure 4 is an enlarged view of a detail ofFigure 3 , at the junction of the condenser sections; -
Figure 5 is a partially horizontally sectional view, as taken along the line V-V ofFigure 1 ; -
Figure 6 shows a portion of the front schematic sectional view ofFigure 1 , with the means for removing the sections that compose the condenser; -
Figure 7 shows a front schematic partially vertically sectional view of a second embodiment of the laundry dryer machine of the invention, with the filters for the drying air flow in an operating position; -
Figure 8 shows the embodiment ofFigure 7 with one of the filters for the drying air flow removed from its operating position and with the first section of the condenser also removed from its operating position. - Referring to the above figures, the laundry dryer machine of the invention comprises a box-like structure containing the various devices, which is comprised of a
base 1, atop wall 2, a frontvertical wall 3, a backvertical wall 4 and lateralvertical walls 5 and 6. - The containing structure houses the
drum 7, which rotates about a generally horizontal axis X-X, and is adapted to contain the laundry to be dried, which is loaded and unloaded through anopening 8 formed in thefront wall 3 of the containing structure. Theopening 8 is in the form of atubular recess 3A of the wall whose axis is parallel to the axis of rotation X-X of thedrum 7. - The opening 8 is closed by a
door 8A, which is mounted in thewall 3 to be opened and closed by the user of the machine by conventional fastening and support means, which are not shown as they are unnecessary for the understanding of the present invention. - The
door 8A of the prior art generally has the shape of a washing-machine window. - The
drum 7 is conventionally mounted in such a configuration as to rotate by the action of support and drive means, which are known in the art and not shown, as they are unnecessary for the understanding of the present invention. - The laundry loaded into the
drum 7 through theopening 8, which is closed by thedoor 8A, is dried by a flow of drying air, which is circulated through a path comprising a fan 9 for moving said flow, amotor 10 for driving said fan, at least onefilter 11 for filtering the flow, the cavity of thedrum 7 containing the laundry to be dried, acondenser 11 with a plurality ofinner channels 13, aconduit 14 connecting thecondenser 12 to theinlet 15 of the fan 9, with amanifold portion 16 for grouping the outlets of thecondenser channels 13. - A
conventional tray 17 is placed under themanifold portion 16 of thechannel 14, for collecting the condensate obtained from the removal of moisture absorbed by the flow through the laundry in thedrum 7. - Downstream from the fan 9, the drying air path comprises a
device 18 that heats the drying air flow if and when this is required by the operating cycle of the laundry dryer machine. - The
heating device 18 conventionally consists of an electrical resistor. - The box-like containing structure also houses a
conduit 19 for conveying a flow of drying air onto thecondenser 12, said conduit being equipped with afan 20 which, in the illustrated embodiment, is driven by the sameelectric motor 10 that drives the fan 9. Alternatively, thefan 20 may be driven by a dedicated independent electric motor. - The
conduit 19 has a first air intake opening 21 and a second exhaust opening 22, bothopenings - The drying air that flows through the
conduit 19 moves across thecondenser 12 through dedicated channels, referenced 23. - According to the invention, the
condenser 12 is placed under thedoor 8A through which the laundry is loaded into thedrum 7, more particularly in aniche 24 formed in the frontvertical wall 3 of the containing structure, between thelower profile 25 of thedoor 8A and the upper wall of theportion 16 of theconduit 14. - Still according to the invention, the
condenser 12 comprises at least one first and one second sections, referenced 12A and 12B respectively, in which respective portions of thechannels 13, through which the drying air flows, are referenced 13A and 13B. - The two sections of the
condenser 12 are vertically arranged one above the other, with theirrespective channel portions single channel 13. Apartition 26 is placed at the junction between thechannel portions holes 27 formed at the longitudinal axis of thechannel portions channel 13.Pads 28, for instance made of rubber or plastic, are placed adjacent to the throughholes 27 and project out of both sides of thepartition 26, thereby acting as seals to hold thechannels 13 separate from thechannels 23 through which the cooling air is caused to flow. - When the
condenser 12 is in its operating position in theniche 24, the channels extend from top to bottom, preferably in a vertical direction relative to thebase 1 of the containing structure. - Otherwise, the
channels 13 may be inclined to thebase 1. - The
channels 23 for the drying air flow extend transverse, preferably perpendicular to the direction of thechannels 13. - As a whole, each of the
sections condenser 12 has a rectangular parallelepiped shape and theniche 24 has a corresponding volumetric conformation, of slightly larger size, to allow insertion and removal of theindividual sections first section 12A as well as proper positioning to ensure continuity of thechannels 13. - The insertion and removal of the
sections condenser 12 are allowed by the provision of a first rod-like element 29 attached to one side of thesection 12A and a second rod-like element 30 attached to one side of thesecond section 12B. Theseelements sections entrance 31 of theniche 24, where theirfree ends - The bottom 24A of the
niche 24 has an opening 24B which communicates with themanifold portion 16 of theconduit 14 for circulation of the drying air flow. - For accurate placement and removal of the
sections niche 24 and conventional counter-guides may be formed in the corresponding sides of thesections - The opening of the
door 8A for loading the laundry into thedrum 7 allows immediate access to theentrance 31 of theniche 24, as well as immediate access to theends elements sections condenser 12, thereby avoiding the need of providing specially dedicated doors for access to the condenser, unlike the prior art. - Preferably, the
door 8A has a contour with an essentially rectilinear section at theentrance 31 of theniche 24, the rest of the contour maintaining its circular shape. - With this shape, the
condenser 12 has the required overall size to ensure its function of exchanging heat between the hot moist flow of drying air and the flow of cooling air. - The vertical dimensions of the
sections opening 8 when thedoor 8A is opened to remove each section of the condenser first from theniche 24 and then out of theopening 8. - Furthermore, the provision of a
condenser 12 composed of twosections first section 12A, as thedoor 8A is opened for loading or unloading laundry. According to the invention, in the embodiment as shown inFigures 1 and2 , thefilter 11 inserted within the path of drying air is in the form of a tubular body inserted in thetubular recess 3A of theopening 8. - The cross section of the
filter 11 conforms to that of the inner contour of the tubular recess of theopening 8, anannular channel 32 being thus formed between thewall 11A made of filter material of thefilter 11 and the wall surrounding therecess 3A. - The
filter 11 has aflange 11B which axially abuts against the inner edge 3B of the tubular recess thereby isolating saidannular chamber 32 from the cavity of thedrum 7. - The flow of drying air axially enters the tubular body of the
filter 11 and exits therefrom to enter theannular gap 32. From the latter, it flows through theentrance 31 of theniche 24 into thechannels 13 of thecondenser 12 and moves to the bottom, where it enters themanifold portion 16 of theconduit 14, under the suction effect of the fan 9. - The position of the
filter 11 within theopening 8 allows immediate inspection of the cleaning conditions of the filter as thedoor 8A is opened and particularly, if thetubular wall 11A of thefilter 11 is dirty, the user will be motivated to clean it, even before removing the laundry at the end of a drying cycle. Referring to the second embodiment of the laundry dryer machine of the invention, as shown inFigures 7 and8 , it shall be noted that the filter for the drying air flow comprises two curved hollow bodies, referenced 33 and 34 respectively, facing toward each other, in the contour of thetubular recess 3A of theopening 8. Such curvedhollow bodies like wall 35 that covers the upper part of thefirst section 12A of thecondenser 12 and a wall opposed thereto, referenced 36, also in grid form, which forms a chamber with the envelope wall of thetubular recess 3A of theopening 8. Each of thehollow bodies front wall respective back wall respective compartments - The latter communicate with the
chamber 37 throughrespective openings respective passages wall 36. - The contour of the
tubular recess 3A of theopening 8 has afirst channel 38 located behind thehollow filtering body 33 and asecond channel 39 behind thehollow filtering body 34. These channels extend parallel to the filteringwalls ends respective openings first section 12A of thecondenser 12, under thewall 35. - It will be appreciated from the above that the flow of drying air moved by the fan 9 out of the drum, enters the
chamber 37 and then thechamber filtering bodies filtering wall condenser 12 through thechannels - Also according this second embodiment, any clogging of the
filtering bodies door 8A. Therefore, cleaning may be carried out by the user, even before removing the dried laundry. - Cleaning of one or both filtering
bodies opening 8, as shown inFigure 8 and by pulling them off the machine without requiring any special inspection door for the filtration system. - It shall be noted that the provision of the
filtering bodies tubular recess 3A of theopening 8, withrespective channels drum 7 is reversed. This is because, depending on the direction of rotation of the drum, the drying air will preferentially flow into one or the other of thechannels filtering body 33 or the one referenced 34, with doubtless advantages in terms of energy efficiency of the machine. - It shall be understood that variant embodiments other than those described and illustrated herein may be implemented by those skilled in the art, without departure from the scope of the present invention, as claimed below.
Claims (4)
- A laundry dryer machine, wherein a flow of drying air is circulated through a path, which comprises a fan for moving said flow, a motor for driving said fan, at least one filter for filtering the flow, a drum for containing the laundry to be dried, a condenser with a plurality of channels for the flow of drying air, for removing the moisture absorbed by the flow through the laundry in the drum, a container for collecting the condensate removed from the flow of drying air, a box-like structure for containing the components of the machine, said structure having a base, a top surface, a front vertical wall, a back vertical wall and corresponding lateral vertical walls, an opening formed in said front vertical wall for loading the laundry to be dried into the drum and for removing it at the end of the drying process, a door adapted to assume an open position and a closed position to open and close said opening for loading and removing laundry, a conduit for conveying a flow of cooling air to the condenser, said conduit having a fan, a motor for driving it, as well as a first air intake opening and a second air exhaust opening, both openings communicating with the environment outside the machine, characterized in that said opening for loading and removing the laundry into and from the drum comprises a tubular recess (3A) of said front vertical wall (3) and that said filter (11, 33, 34) for filtering the flow of drying air is located in said tubular recess (3A), coaxial with the axis thereof, with at least one chamber (32, 38, 39) being formed between the wall (11A, 33B, 34B) made of filter material of the filter (11, 33, 34) and the inner wall of said tubular recess (3A), means (11B, 33A, 34A) being provided to isolate said chamber from the cavity of the drum.
- A laundry dryer machine as claimed in claim 1, characterized in that said filter comprises a tubular body inserted in said tubular recess (3A), the cross section of said tubular body conforming to that of the contour of said tubular recess, with an annular chamber (32) being formed between the wall (11A) made of filtering material of the tubular body of the filter (11) and the inner wall of the tubular recess (3A).
- A laundry dryer machine as claimed in claim 1, characterized in that said filter comprises at least one hollow curved filtering body (33, 34) located in the contour of the tubular recess (3A) of the opening (8), said hollow body (33, 34) extending between a grid-like wall (35) that covers the upper part of the condenser (12) and a wall (36) opposed thereto, also in grid form, which forms a rear chamber (37) with the contouring wall of the tubular recess (3A) of the opening (8), said hollow body (33, 34) being composed of a front wall (33A, 34A) facing toward the drum (7) and a back wall (33B, 34B), the latter being made of a filter material, spaced from the former with an intermediate compartment (33C, 34C) being formed therebetween, said intermediate compartment communicating with said rear chamber (37) through an opening (33D and 34D) aligned with a corresponding passage (36A, 36B) formed in said wall (36) that forms said rear chamber, a channel (38, 39) being provided behind said hollow filtering body (33, 34), which extends parallel to said filtering wall (33B, 34B), and is closed at one end (38A, 39A) and open at the other end, proximate to said condenser (12).
- A laundry dryer machine as claimed in claim 3, characterized in that said filter comprises a pair of hollow curved filtering bodies (33, 34) disposed in mutually facing relation in said tubular recess (3A) of the opening (8) for loading and removing laundry.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11425106.9A EP2511414B1 (en) | 2011-04-15 | 2011-04-15 | Filtration system for laundry dryer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11425106.9A EP2511414B1 (en) | 2011-04-15 | 2011-04-15 | Filtration system for laundry dryer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2511414A1 true EP2511414A1 (en) | 2012-10-17 |
EP2511414B1 EP2511414B1 (en) | 2020-05-06 |
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ID=44532706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11425106.9A Active EP2511414B1 (en) | 2011-04-15 | 2011-04-15 | Filtration system for laundry dryer |
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EP (1) | EP2511414B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2980306A1 (en) * | 2014-07-31 | 2016-02-03 | Indesit Company S.p.A. | Household drying appliance with improved inlet section of the drying fluid in the condenser |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8437357U1 (en) * | 1984-12-20 | 1985-03-21 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | HOUSEHOLD LAUNDRY DRYER WITH A FLUSH FILTER |
EP1925713A1 (en) | 2006-11-24 | 2008-05-28 | CANDY S.p.A. | Laundry drier with an additional controlled-temperature compartment for delicate laundry |
EP1990464A1 (en) | 2007-05-09 | 2008-11-12 | CANDY S.p.A. | Laundry dryer with temperature-controlled suplementary compartment and method for drying in this compartment |
EP2107156A1 (en) * | 2008-04-02 | 2009-10-07 | Miele & Cie. KG | Laundry treatment machine, in particular laundry dryer |
EP2273005A2 (en) * | 2009-06-29 | 2011-01-12 | Miele & Cie. KG | Tumble dryer |
-
2011
- 2011-04-15 EP EP11425106.9A patent/EP2511414B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8437357U1 (en) * | 1984-12-20 | 1985-03-21 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | HOUSEHOLD LAUNDRY DRYER WITH A FLUSH FILTER |
EP1925713A1 (en) | 2006-11-24 | 2008-05-28 | CANDY S.p.A. | Laundry drier with an additional controlled-temperature compartment for delicate laundry |
EP1990464A1 (en) | 2007-05-09 | 2008-11-12 | CANDY S.p.A. | Laundry dryer with temperature-controlled suplementary compartment and method for drying in this compartment |
EP2107156A1 (en) * | 2008-04-02 | 2009-10-07 | Miele & Cie. KG | Laundry treatment machine, in particular laundry dryer |
EP2273005A2 (en) * | 2009-06-29 | 2011-01-12 | Miele & Cie. KG | Tumble dryer |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2980306A1 (en) * | 2014-07-31 | 2016-02-03 | Indesit Company S.p.A. | Household drying appliance with improved inlet section of the drying fluid in the condenser |
Also Published As
Publication number | Publication date |
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EP2511414B1 (en) | 2020-05-06 |
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