EP1905882B1 - Laundry drier - Google Patents
Laundry drier Download PDFInfo
- Publication number
- EP1905882B1 EP1905882B1 EP06121575A EP06121575A EP1905882B1 EP 1905882 B1 EP1905882 B1 EP 1905882B1 EP 06121575 A EP06121575 A EP 06121575A EP 06121575 A EP06121575 A EP 06121575A EP 1905882 B1 EP1905882 B1 EP 1905882B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- annular chamber
- drying air
- laundry drier
- laundry
- 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.)
- Not-in-force
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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
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
-
- 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
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
- D06F58/04—DetailsĀ
Definitions
- the present invention relates to a laundry drier, preferably for home use.
- Known laundry driers operate in various ways, and in particular may condense a stream of hot air blown into a drying drum to remove moisture from the laundry, or may exhaust the stream of moisture-laden hot air directly from the drier.
- Known laundry driers comprise a ventilation system (i. e. usually a blower comprising a fan and an electric fan motor) and a heating arrangement, which draw air from outside, and heat and blow the air into and through the laundry drum; and the hot drying air is then either exhausted directly from the drier or fed to condensing means to condense the moisture collected in the hot air.
- a known condensation laundry drier comprises a laundry drum; an air intake conduit for feeding the hot drying air into the drum through an inflow opening; and an air outlet or exhaust conduit for exhausting the hot drying air from inside the drum through a corresponding outflow opening.
- the air conduits are connected to each other by a condenser for condensing the moisture in the hot drying air flowing through it.
- the hot drying air which evaporates the water in the laundry, flows axially into the drum from the rear of the drum (i.e. in a direction parallel to the central rotation axis of the drum), and axially out of the drum from the front.
- the hot drying air flows in and out of the drum along an axial path, i.e. in a rear-to-front direction from the rear drum flange to the front drum outlet, so that the heating element for heating the drying air is located at the rear of the drier, close to the rear of the drum.
- EP1666657A1 describes a front-loading laundry drier comprising a laundry drum; a delivery conduit for feeding drying air into the drum; and an outflow conduit for removing the drying air from inside the drum.
- EP1634984A1 describes a combination washing machine-drier comprising a top main body; a tub housing a revolving drum; a heat pump; a tub ventilation conduit comprising an intake conduit for hot, dry air blown into the tub; a suction conduit for moisture-laden air from the tub; and a base connected to the bottom of the top main body and housing the heat pump.
- the intake conduit is located between the base and a first opening in the tub, and the suction conduit is located between the base and a second opening in the tub.
- the hot drying air flows radially into and out of the drum (i.e. in a direction perpendicular to the central rotation axis of the drum), and so tends to be concentrated in a portion of the drum close to the inflow and outflow openings, as opposed to being distributed evenly inside the drum.
- German patent n. DE 88054 and Swiss patent n. CH 307608 disclose a laundry drier comprising a rotating drum, on which lateral surface a nozzle is provided, adapted for admitting a flow of hot air into the drum in a direction tangent to the lateral surface of the latter; inside the drum the flow of hot air divides in two parts which, after traversing the clothes contained in the drum, comes out axially from the latter, respectively via two openings present at the two longitudinal ends of the drum. Also this solution, however, doesn't guarantee an even distribution of the hot air flow inside the drum.
- European patent application n, EP 1 600 548 A2 discloses a clothes dryer including a drum rotatably installed in a cabinet, a plurality of vent holes being formed on the circumferential surface of the drum, first and second ducts coupled to the drum, respectively, for sucking and exhausting air to/from the drum, and a fan motor for forcibly sending air through the first and second ducts.
- a clothes dryer can increase a capacity of the drum without increasing a size of the cabinet.
- Number 1 in Figure 1 indicates as a whole a laundry drier comprising a casing 2 resting on a floor 3 on a number of feet 4.
- Casing 2 supports a revolving laundry drum 5, which rotates about a horizontal rotation axis 6 (in alternative embodiments not shown, rotation axis 6 may be tilted or vertical), and front access to which is closed by a hinged door (not shown).
- Laundry drier 1 also comprises a ventilation system 7, which draws air from the outside, and heats and blows the air into and through laundry drum 5. The hot drying air is then conducted out of drum 5 and blown to a condenser 8 to condense the moisture collected in the hot air; and, downstream from condenser 8, the dry hot air is blown back into and through drum 5.
- condenser 8 is also fed through with a stream of "cold" air, i.e. air drawn in from the outside and fed to condenser 8 by a corresponding cooling conduit (not shown).
- Ventilation system 7 comprises an air intake conduit 9 for feeding the hot drying air into drum 5 through an inflow opening 10; and an air exhaust conduit 11 for exhausting the hot drying air from inside the drum through a corresponding outflow opening 13.
- Air conduits 9 and 11 are connected to each other by condenser 8, which condenses the moisture in the hot drying air flowing through it.
- Ventilation system 7 also comprises a heating device 13 (e.g. an electric resistor) located along air intake conduit 9 to heat the drying air; and a fan 14 located along air intake conduit 9, upstream from condenser 8 (as shown in Figure 1 ) or downstream from condenser 8 (as in an alternative embodiment not shown).
- a heating device 13 e.g. an electric resistor
- Outflow opening 13 is located at a front access opening of drum 5 and close to rotation axis 6, so that the hot drying air flows axially out of drum 5 from the front (i.e. in a direction parallel to central rotation axis 6 of drum 5).
- inflow opening 10 comprises a number of through holes 15 formed through a lateral surface 16 of drum 5 to define a circular perforated strip 17 on lateral surface 16 of drum 5.
- lateral surface 16 of drum 5 only has through holes 15 in perforated strip 17, while the rest of lateral surface 16 has no perforation.
- Intake conduit 9 terminates with an annular chamber 18 defined inside a hollow ring 19 surrounding drum 5 to completely cover perforated strip 17, so that the hot drying air fed along intake conduit 9 reaches annular chamber 18 and flows into drum 5 through holes 15 in perforated strip 17.
- the hot drying air therefore flows radially into drum 5 (i.e. in a direction perpendicular to central rotation axis 6 of drum 5).
- perforated strip 17 and, therefore, annular chamber 18 are located close to a rear wall 20 of drum 5, so that the hot drying air flows radially into and axially out of drum 5 along a rear-to-front direction path from rear wall 20 to the front access opening of drum 5.
- the hot drying air flows radially into and axially out of drum 5 along a periphery-to-centre direction path.
- respective sliding seals 22 are interposed between lateral surface 16 of drum 5 and lateral walls 21 and 21' of annular chamber 18.
- Sliding seals 22 may be fixed to lateral walls 21 and 21' of annular chamber 18 and slide along lateral surface 16 of drum 5, or may be fixed to lateral surface 16 of drum 5 and slide along lateral walls 21 and 21' of annular chamber 18.
- a rear lateral wall 21 of annular chamber 18 is larger than a front lateral wall 21', and partly overlaps rear wall 20 of drum 5, so that the sliding seal 22 of rear lateral wall 21 is interposed between rear lateral wall 21 of annular chamber 18 and rear wall 20 of drum 5, and is easier to implement than sliding seal 22 of front lateral wall 21'.
- condenser 8 heating device 13, and fan 14 are located at the bottom (in the base) of casing 2, and therefore beneath drum 5, so that air intake conduit 9 and air exhaust conduit 11 are both substantially vertical.
- heating device 13 is housed in the base of casing 2, the protective metal parts normally surrounding heating device 13 may be reduced, thus reducing cost.
- condenser 8 and the relative cooling conduit are referred to here purely by way of example in connection with one embodiment and a particularly advantageous application of the present invention, and may be omitted in the case of an exhaust-type laundry drier 1 (i.e. in which the hot drying air from drum 5 is exhausted directly from laundry drier 1).
- Laundry drier 1 as described above has numerous advantages, by being cheap and easy to implement, and by providing for extremely even distribution of the hot drying air inside drum 5.
- inflow opening 10 being defined by all the holes 15 in perforated strip 17, has a large area, and is also perfectly symmetrical with respect to drum 5, thus enabling extremely even distribution of the hot drying air inside drum 5.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Polarising Elements (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Woven Fabrics (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
- The present invention relates to a laundry drier, preferably for home use.
- Known laundry driers operate in various ways, and in particular may condense a stream of hot air blown into a drying drum to remove moisture from the laundry, or may exhaust the stream of moisture-laden hot air directly from the drier. Known laundry driers comprise a ventilation system (i. e. usually a blower comprising a fan and an electric fan motor) and a heating arrangement, which draw air from outside, and heat and blow the air into and through the laundry drum; and the hot drying air is then either exhausted directly from the drier or fed to condensing means to condense the moisture collected in the hot air.
- A known condensation laundry drier comprises a laundry drum; an air intake conduit for feeding the hot drying air into the drum through an inflow opening; and an air outlet or exhaust conduit for exhausting the hot drying air from inside the drum through a corresponding outflow opening. The air conduits are connected to each other by a condenser for condensing the moisture in the hot drying air flowing through it.
- In a standard laundry drier, the hot drying air, which evaporates the water in the laundry, flows axially into the drum from the rear of the drum (i.e. in a direction parallel to the central rotation axis of the drum), and axially out of the drum from the front. In other words, the hot drying air flows in and out of the drum along an axial path, i.e. in a rear-to-front direction from the rear drum flange to the front drum outlet, so that the heating element for heating the drying air is located at the rear of the drier, close to the rear of the drum.
- One example of a standard laundry drier is described in
EP1666657A1 , which describes a front-loading laundry drier comprising a laundry drum; a delivery conduit for feeding drying air into the drum; and an outflow conduit for removing the drying air from inside the drum. - In standard laundry driers of the above type, however, the hot drying air tends to be concentrated in the centre of the drum, around the central rotation axis of the drum, as opposed to being distributed evenly inside the drum.
-
EP1634984A1 describes a combination washing machine-drier comprising a top main body; a tub housing a revolving drum; a heat pump; a tub ventilation conduit comprising an intake conduit for hot, dry air blown into the tub; a suction conduit for moisture-laden air from the tub; and a base connected to the bottom of the top main body and housing the heat pump. The intake conduit is located between the base and a first opening in the tub, and the suction conduit is located between the base and a second opening in the tub. - In the combination washing machine-drier in
EP1634984 Al, however, the hot drying air flows radially into and out of the drum (i.e. in a direction perpendicular to the central rotation axis of the drum), and so tends to be concentrated in a portion of the drum close to the inflow and outflow openings, as opposed to being distributed evenly inside the drum. - German patent n.
DE 88054 and Swiss patent n.CH 307608 - European patent application n,
EP 1 600 548 A2 discloses a clothes dryer including a drum rotatably installed in a cabinet, a plurality of vent holes being formed on the circumferential surface of the drum, first and second ducts coupled to the drum, respectively, for sucking and exhausting air to/from the drum, and a fan motor for forcibly sending air through the first and second ducts. Here, at least one of the first and second ducts is linked to the plurality of vent holes. The clothes dryer can increase a capacity of the drum without increasing a size of the cabinet. - It is an object of the present invention to provide a laundry drier designed to eliminate the aforementioned drawbacks, and which is cheap and easy to implement.
- According to the present invention, there is provided a laundry drier as claimed in the accompanying Claims.
- Non-limiting embodiments of the present invention will be described by way of example with reference to the accompanying drawings, in which:
-
Figure 1 shows a schematic side view of a laundry drier in accordance with the present invention; -
Figure 2 shows a schematic view in perspective of a drum of theFigure 1 laundry drier; -
Figure 3 shows a schematic, exploded view in perspective of theFigure 2 drum; and -
Figure 4 shows a schematic side view of an alternative embodiment of a laundry drier in accordance with the present invention. - Number 1 in
Figure 1 indicates as a whole a laundry drier comprising acasing 2 resting on afloor 3 on a number of feet 4.Casing 2 supports a revolvinglaundry drum 5, which rotates about a horizontal rotation axis 6 (in alternative embodiments not shown,rotation axis 6 may be tilted or vertical), and front access to which is closed by a hinged door (not shown). - Laundry drier 1 also comprises a
ventilation system 7, which draws air from the outside, and heats and blows the air into and throughlaundry drum 5. The hot drying air is then conducted out ofdrum 5 and blown to acondenser 8 to condense the moisture collected in the hot air; and, downstream fromcondenser 8, the dry hot air is blown back into and throughdrum 5. In a preferred embodiment,condenser 8 is also fed through with a stream of "cold" air, i.e. air drawn in from the outside and fed to condenser 8 by a corresponding cooling conduit (not shown). -
Ventilation system 7 comprises anair intake conduit 9 for feeding the hot drying air intodrum 5 through aninflow opening 10; and anair exhaust conduit 11 for exhausting the hot drying air from inside the drum through acorresponding outflow opening 13.Air conduits condenser 8, which condenses the moisture in the hot drying air flowing through it.Ventilation system 7 also comprises a heating device 13 (e.g. an electric resistor) located alongair intake conduit 9 to heat the drying air; and afan 14 located alongair intake conduit 9, upstream from condenser 8 (as shown inFigure 1 ) or downstream from condenser 8 (as in an alternative embodiment not shown). -
Outflow opening 13 is located at a front access opening ofdrum 5 and close torotation axis 6, so that the hot drying air flows axially out ofdrum 5 from the front (i.e. in a direction parallel tocentral rotation axis 6 of drum 5). As shown more clearly inFigure 3 ,inflow opening 10 comprises a number of throughholes 15 formed through alateral surface 16 ofdrum 5 to define a circular perforated strip 17 onlateral surface 16 ofdrum 5. In other words,lateral surface 16 ofdrum 5 only has throughholes 15 in perforated strip 17, while the rest oflateral surface 16 has no perforation. -
Intake conduit 9 terminates with anannular chamber 18 defined inside ahollow ring 19 surroundingdrum 5 to completely cover perforated strip 17, so that the hot drying air fed alongintake conduit 9 reachesannular chamber 18 and flows intodrum 5 throughholes 15 in perforated strip 17. The hot drying air therefore flows radially into drum 5 (i.e. in a direction perpendicular tocentral rotation axis 6 of drum 5). In a preferred embodiment, perforated strip 17 and, therefore,annular chamber 18 are located close to arear wall 20 ofdrum 5, so that the hot drying air flows radially into and axially out ofdrum 5 along a rear-to-front direction path fromrear wall 20 to the front access opening ofdrum 5. Moreover, with a radial inlet and an axial outlet, the hot drying air flows radially into and axially out ofdrum 5 along a periphery-to-centre direction path. - In a preferred embodiment, between
lateral surface 16 ofdrum 5 andlateral walls 21 and 21' ofannular chamber 18, respective slidingseals 22 are interposed to seal and prevent hot drying air leakage fromannular chamber 18. Slidingseals 22 may be fixed tolateral walls 21 and 21' ofannular chamber 18 and slide alonglateral surface 16 ofdrum 5, or may be fixed tolateral surface 16 ofdrum 5 and slide alonglateral walls 21 and 21' ofannular chamber 18. - In
figure 4 , a rearlateral wall 21 ofannular chamber 18 is larger than a front lateral wall 21', and partly overlapsrear wall 20 ofdrum 5, so that the slidingseal 22 of rearlateral wall 21 is interposed between rearlateral wall 21 ofannular chamber 18 andrear wall 20 ofdrum 5, and is easier to implement than slidingseal 22 of front lateral wall 21'. - In a preferred embodiment,
condenser 8,heating device 13, andfan 14 are located at the bottom (in the base) ofcasing 2, and therefore beneathdrum 5, so thatair intake conduit 9 andair exhaust conduit 11 are both substantially vertical. Whenheating device 13 is housed in the base ofcasing 2, the protective metal parts normally surroundingheating device 13 may be reduced, thus reducing cost. - It should be pointed out that
condenser 8 and the relative cooling conduit are referred to here purely by way of example in connection with one embodiment and a particularly advantageous application of the present invention, and may be omitted in the case of an exhaust-type laundry drier 1 (i.e. in which the hot drying air fromdrum 5 is exhausted directly from laundry drier 1). - Laundry drier 1 as described above has numerous advantages, by being cheap and easy to implement, and by providing for extremely even distribution of the hot drying air inside
drum 5. - More specifically, extremely even distribution of the hot drying air inside
drum 5 is achieved by providing a radial inlet close torear wall 20 ofdrum 5, and an axial outlet from the front access opening ofdrum 5, so that the hot drying air flows radially into and axially out ofdrum 5 along a path in a rear-to-front direction and in a periphery-to-centre direction fromrear wall 20 to the front access opening ofdrum 5. It is important to point out that inflow opening 10, being defined by all theholes 15 in perforated strip 17, has a large area, and is also perfectly symmetrical with respect todrum 5, thus enabling extremely even distribution of the hot drying air insidedrum 5.
Claims (11)
- A laundry drier (1) comprising:a revolving laundry drum (5) having a front access opening; anda ventilation system (7), which blows drying air into and through the drum (5), and comprises an air intake conduit (9) for feeding the drying air into the drum (5) through an inflow opening (10), and an air exhaust conduit (11) for exhausting the drying air from inside the drum through an outflow opening (12);the inflow opening (10) being located at a lateral surface (16) of the drum (5), and the outflow opening (12) being located at the front access opening of the drum (5), so that the drying air flows radially into the drum (5) and axially out of the drum (5) in a rear-to-front direction and a periphery-to-centre direction, the intake conduit (9) terminating with an annular chamber (18) surrounding the drum (5) to completely cover said inflow opening (10), the front lateral wall (21') of said annular chamber (18) being rotatably associated to the lateral surface (16) of said drum (5), characterized in that a rear lateral wall (21) of said annular chamber (18) is larger than said front lateral wall (21'), and partly overlaps a rear wall (20) of the drum (5).
- A laundry drier (1) as claimed in Claim 1, wherein the inflow opening (10) comprises a number of through holes (15) formed through the lateral surface (16) of the drum (5) to define a circular perforated strip (17) on the lateral surface (16) of the drum (5); and the rest of the lateral surface (16) has no perforation.
- A laundry drier (1) as claimed in Claim 1 or 2, wherein, between the lateral surface (16) of the drum (5) and front lateral wall (21') of the annular chamber (18), a sliding seal (22) is interposed to seal the annular chamber (18) and prevent hot drying air leakage from the annular chamber (18).
- A laundry drier (1) as claimed in Claim 3, wherein a sliding seal (22) is fixed to the front lateral wall (21') of the annular chamber (18).
- A laundry drier (1) as claimed in Claim 3, wherein a sliding seal (22) is fixed to the lateral surface (16) of the drum (5).
- A laundry drier (1) as claimed in one or more of the previous claims, wherein, between the rear wall (20) of the drum (5) and the rear lateral wall (21) of the annular chamber (18), a sliding seal (22) is interposed to seal the annular chamber (18) and prevent hot drying air leakage from the annular chamber (18).
- A laundry drier (1) as claimed in Claim 6, wherein said sliding seals (22) is fixed to the rear lateral wall (21) of the annular chamber (18).
- A laundry drier (1) as claimed in Claim 6, wherein said sliding seal (22) is fixed to the real wall (20) of the drum (5).
- A laundry drier (1) as claimed in any of Claims 1 to 8, wherein the ventilation system (7) comprises a condenser (8) to condense the moisture collected in the drying air from the drum (5).
- A laundry drier (1) as claimed in any of Claims 1 to 9, wherein the ventilation system (7) comprises a heating device (13) for heating the drying air; and a fan (14).
- A laundry drier (1) as claimed in Claim 10, wherein the heating device (13) and the fan (14) are housed in a bottom portion of a casing (2) and located beneath the drum (5).
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602006013460T DE602006013460D1 (en) | 2006-09-29 | 2006-09-29 | clothes dryer |
PL06121575T PL1905882T3 (en) | 2006-09-29 | 2006-09-29 | Laundry drier |
EP06121575A EP1905882B1 (en) | 2006-09-29 | 2006-09-29 | Laundry drier |
AT06121575T ATE463607T1 (en) | 2006-09-29 | 2006-09-29 | CLOTH DRYER |
ES06121575T ES2344270T3 (en) | 2006-09-29 | 2006-09-29 | DRYER. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06121575A EP1905882B1 (en) | 2006-09-29 | 2006-09-29 | Laundry drier |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1905882A1 EP1905882A1 (en) | 2008-04-02 |
EP1905882B1 true EP1905882B1 (en) | 2010-04-07 |
Family
ID=37762365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06121575A Not-in-force EP1905882B1 (en) | 2006-09-29 | 2006-09-29 | Laundry drier |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1905882B1 (en) |
AT (1) | ATE463607T1 (en) |
DE (1) | DE602006013460D1 (en) |
ES (1) | ES2344270T3 (en) |
PL (1) | PL1905882T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8959789B2 (en) | 2009-05-28 | 2015-02-24 | Girbau, S.A. | Tunnel-type rotary-drum tumble dryer |
CN112941801B (en) * | 2019-12-10 | 2023-11-17 | åč„æåēµåØļ¼ę±čļ¼ęéå ¬åø | Laundry treating apparatus and method and device for operating the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE880584C (en) * | 1951-08-29 | 1953-05-07 | Franz Pluemer Sen | Method for drying laundry or the like. Equipment and device for practicing the method |
NL89408C (en) * | 1951-08-29 | |||
BE1015122A3 (en) * | 2002-09-26 | 2004-10-05 | Ipso Lsg Nv | Dryer. |
KR100608665B1 (en) * | 2004-05-13 | 2006-08-08 | ģģ§ģ ģ ģ£¼ģķģ¬ | Clothes dryer |
EP1634984A1 (en) * | 2004-09-09 | 2006-03-15 | Electrolux Home Products Corporation N.V. | Combined drying-washing machine with heating pump |
-
2006
- 2006-09-29 AT AT06121575T patent/ATE463607T1/en not_active IP Right Cessation
- 2006-09-29 ES ES06121575T patent/ES2344270T3/en active Active
- 2006-09-29 EP EP06121575A patent/EP1905882B1/en not_active Not-in-force
- 2006-09-29 DE DE602006013460T patent/DE602006013460D1/en active Active
- 2006-09-29 PL PL06121575T patent/PL1905882T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE602006013460D1 (en) | 2010-05-20 |
ES2344270T3 (en) | 2010-08-23 |
ATE463607T1 (en) | 2010-04-15 |
PL1905882T3 (en) | 2010-09-30 |
EP1905882A1 (en) | 2008-04-02 |
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