EP1925712B2 - Laundry drier with circuit to limit internal condensation - Google Patents
Laundry drier with circuit to limit internal condensation Download PDFInfo
- Publication number
- EP1925712B2 EP1925712B2 EP06425796.7A EP06425796A EP1925712B2 EP 1925712 B2 EP1925712 B2 EP 1925712B2 EP 06425796 A EP06425796 A EP 06425796A EP 1925712 B2 EP1925712 B2 EP 1925712B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- duct
- machine
- cold air
- heat exchanger
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009833 condensation Methods 0.000 title claims description 12
- 230000005494 condensation Effects 0.000 title claims description 12
- 238000001035 drying Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 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 dryers
- D06F58/24—Condensing arrangements
Definitions
- This invention relates to a machine for drying laundry.
- Laundry drying machines of the condensation type in which the moist air leaving the drum in which the laundry being dried is contained is caused to pass through heat exchanger devices which cool the said hot moist air with cold air from the exterior producing condensation water.
- the said machines are provided with tanks for the collection of condensation water generally located beneath the heat exchanger; the said tanks may be of the fixed or removable type.
- the moist air leaving the drying drum is passed to heating resistances to be heated and passed to the drying drum while the cold air is discharged outside the machine.
- EP-A-0 465 318 where the heat exchanger is in form of a rotating plate which makes a separation between an upper space, where the drum is located, and a bottom space where cooling air is admitted through apertures in communication with the outside of the machine.
- the cooling air used for cooling the rotating plate is free to go in and out from the bottom space without being canalised inside a duct.
- the object of this invention is to provide a laundry drying machine which overcomes the abovementioned disadvantages.
- this object is accomplished through a drying machine according to claim 1 below.
- the laundry drying machine is provided with a cabinet 1 having an opening 2 on the front 3 for loading the laundry which has to be dried.
- the machine also comprises a door 2a closing opening 2 in cabinet 1 and a drum 5 to contain the laundry which is to be dried.
- Door 2a is hinged to the front wall 3 of body 1 in a conventional way.
- Drum 5 may be of the fixed type or of the rotating type driven by an electric motor and suitable conventional mechanisms.
- Drum 5 also includes an opening 5a aligned with opening 2 in cabinet 1 for loading the laundry which has to be dried.
- the laundry drying machine comprises a heat exchanger 6 through which the flow of hot moist air 100 originating from drum 5 flows in a conventional way.
- the moist air passing through device 6 is cooled by a flow 200 of cold air obtained from outside the machine through an opening 11, by a fan 7 driven by a motor and passed to device 6 through a duct 12.
- condensation water is produced and is collected in a tank 10 located beneath heat exchanger 6. Any droplets of condensation water which might run along the outside wall of duct 12 are collected in a tray indicated by 10a.
- Cooled air 100 from device 6 is passed to a duct 8 where it is heated by electrical resistances present within duct 8, which are not shown.
- Heated air 100 is driven towards drum 5 by a fan 9 in order to dry the laundry.
- Heat exchanger 6 is preferably located beneath drum 5, as can be seen in Figures 1 and 2 .
- Tank 10 for collecting the condensation water originating from that device 6 is located beneath device 6.
- the laundry drier comprises a duct 20 which discharges the flow of cold air 200 used to cool the air of hot moist air 100 originating from drum 5 in heat exchanger 6 outside the machine through an opening 13.
- Opening 13 is preferably located in the back wall 3a of the machine.
- Ducts 12 and 20 therefore create a ducted route for the flow of air 200 drawn in from the exterior through opening 11, which remains isolated from duct 8 and the other components of the laundry drying machine.
- the said air flow 200 is prevented from lowering the temperature of air flow 100 while the latter is in a position to dry the laundry, preserving optimum performance from the machine.
- Figures 3 and 4 show the structure of connection 19 between duct 20 and heat exchanger device 6 in greater detail; the said connecting structure is provided on a part of device 6 which is different from that to which duct 8 is connected in such a way as to prevent any mixing hot air flow 200 and cold air flow 100 which cross in their respective ducts in air/air heat exchanger 6.
- Figure 5 illustrates a modified embodiment of connecting structure 19 with heat exchanger 6 in Figure 4 .
- connection 19 comprises a duct 21 which conveys cold air flow 200 either towards opening 13 or towards another outlet opening 16.
- Outlet openings 13 and 16 are respectively located in back wall 3a and front wall 3 of cabinet 1. Pressure in the condensation circuit is thus reduced through a greater flow of cooling air 200.
- One of two openings 13 and 16 may be provided with a cover, not shown in the drawings, to block the flow of air to the exterior.
- Figures 6 to 8 show a diagrammatical view of a laundry drying machine according to an embodiment of the invention.
- the said machine comprises a circuit for the partial diffusion of air flow 200 within cabinet 1 of the laundry drier after the said flow has passed through heat exchanger 6.
- the said circuit comprises ducts 301 and 302 which are hydraulically connected together; duct 301, which extends vertically and parallel to front wall 3 of the machine, is connected to connecting structure 19 discharging cold air 200 to the exterior.
- Duct 302 is located in the upper part of the laundry drier, parallel to a covering panel 303 and in the embodiment illustrated in Figures 6 and 7 is therefore perpendicular to duct 301 with which it is connected for the passage of the flow of air.
- Duct 302 is provided with nozzles 304 in order to diffuse cold air 200 within the cabinet of the laundry drying machine, preferably in the direction of the electrical and/or electronic components, indicated diagrammatically by 305, involving control of the machine in such a way as to prevent the formation of condensation upon them or in their vicinity and to prevent them from overheating.
- vertical duct 301 may also be provided with air diffusing nozzles 304 located along its axial length.
- the flow from nozzles 304 may be gauged in relation to the size of the electronic and electrical controls and the size of the part of the machine to which the flow is directed in order to prevent condensation phenomena.
- duct 302 may adopt positions which are angularly displaced in a plane parallel to covering panel 303 of the machine according to requirements, as indicated by dashed lines in Figure 7 .
- vertical duct 301 will be mounted on the machine in such a way as to be angularly movable about its own longitudinal axis.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Description
- This invention relates to a machine for drying laundry.
- Laundry drying machines of the condensation type, in which the moist air leaving the drum in which the laundry being dried is contained is caused to pass through heat exchanger devices which cool the said hot moist air with cold air from the exterior producing condensation water.
- The said machines are provided with tanks for the collection of condensation water generally located beneath the heat exchanger; the said tanks may be of the fixed or removable type.
- After having passed through the heat exchanger the moist air leaving the drying drum is passed to heating resistances to be heated and passed to the drying drum while the cold air is discharged outside the machine.
- In present laundry drying machines there is the disadvantage that after passing through the heat exchanger the flow of cold air, which is not ducted, can flow towards the hot drying air ducts removing further heat from these and thus reducing the efficiency of the drier. In addition to this it may encourage the formation of condensation within the cabinet of the machine with possible damage or overheating of electrical and electronic devices in the machine.
- An example of the above mentioned prior art is disclosed in
DE-A- 195 08 244 where a portion of the cooling air is caused to mix with the hot air used for drying the clothes in the drum of the machine. - Document
DE2923701 discloses the preamble ofclaim 1. - A further example of the prior art is disclosed in
EP-A-0 465 318 where the heat exchanger is in form of a rotating plate which makes a separation between an upper space, where the drum is located, and a bottom space where cooling air is admitted through apertures in communication with the outside of the machine. The cooling air used for cooling the rotating plate, is free to go in and out from the bottom space without being canalised inside a duct. - Moreover, due to the rotation of the plate there is a substantial risk that a part of the cooling air may pass around the circumferential edge of the rotating plate and caused to mix with the air used in the upper space for drying the clothes inside the drum.
- In view of the state of the art described above, the object of this invention is to provide a laundry drying machine which overcomes the abovementioned disadvantages.
- According to this invention, this object is accomplished through a drying machine according to
claim 1 below. - Features and advantages of this invention will be apparent from the following detailed description of a practical embodiment thereof illustrated by way of a non-restrictive example in the appended drawings in which:
-
Figure 1 is a diagrammatical frontal view of a laundry drying machine, in partial cross-section, according to an embodiment of the invention, -
Figure 2 is a diagrammatical side view of the machine inFigure 1 , in partial cross-section, -
Figure 3 is a diagrammatical view of a detail of the machine inFigure 1 in cross-section, -
Figure 4 is a diagrammatical view of the detail inFigure 3 in cross-section rotated through 90°, -
Figure 5 is a diagrammatical view of a modified embodiment of the detail inFigure 4 in cross-section, -
Figure 6 is a diagrammatical side view, in partial cross-section, of a laundry drying machine according to an embodiment of the invention, as claimed, -
Figure 7 is a diagrammatical view from above of the machine inFigure 6 from which the upper covering panel has been removed, -
Figure 8 is a diagrammatical view in cross-section along the line VIII-VIII inFigure 6 . - With reference to
Figures 1 to 4 , it will be seen that the laundry drying machine is provided with acabinet 1 having anopening 2 on thefront 3 for loading the laundry which has to be dried. The machine also comprises adoor 2aclosing opening 2 incabinet 1 and adrum 5 to contain the laundry which is to be dried.Door 2a is hinged to thefront wall 3 ofbody 1 in a conventional way.Drum 5 may be of the fixed type or of the rotating type driven by an electric motor and suitable conventional mechanisms.Drum 5 also includes an opening 5a aligned with opening 2 incabinet 1 for loading the laundry which has to be dried. - The laundry drying machine comprises a
heat exchanger 6 through which the flow of hotmoist air 100 originating fromdrum 5 flows in a conventional way. The moist air passing throughdevice 6 is cooled by aflow 200 of cold air obtained from outside the machine through anopening 11, by afan 7 driven by a motor and passed todevice 6 through aduct 12. - After the flow of moist air has been cooled, condensation water is produced and is collected in a
tank 10 located beneathheat exchanger 6. Any droplets of condensation water which might run along the outside wall ofduct 12 are collected in a tray indicated by 10a. - Cooled
air 100 fromdevice 6 is passed to aduct 8 where it is heated by electrical resistances present withinduct 8, which are not shown. - Heated
air 100 is driven towardsdrum 5 by afan 9 in order to dry the laundry. -
Heat exchanger 6 is preferably located beneathdrum 5, as can be seen inFigures 1 and 2 .Tank 10 for collecting the condensation water originating from thatdevice 6 is located beneathdevice 6. - The laundry drier comprises a
duct 20 which discharges the flow ofcold air 200 used to cool the air of hotmoist air 100 originating fromdrum 5 inheat exchanger 6 outside the machine through anopening 13. -
Opening 13 is preferably located in theback wall 3a of the machine.Ducts air 200 drawn in from the exterior throughopening 11, which remains isolated fromduct 8 and the other components of the laundry drying machine. - In this way the said
air flow 200 is prevented from lowering the temperature ofair flow 100 while the latter is in a position to dry the laundry, preserving optimum performance from the machine. -
Figures 3 and 4 show the structure ofconnection 19 betweenduct 20 andheat exchanger device 6 in greater detail; the said connecting structure is provided on a part ofdevice 6 which is different from that to whichduct 8 is connected in such a way as to prevent any mixinghot air flow 200 andcold air flow 100 which cross in their respective ducts in air/air heat exchanger 6. -
Figure 5 illustrates a modified embodiment of connectingstructure 19 withheat exchanger 6 inFigure 4 . - As will be seen,
connection 19 comprises aduct 21 which conveyscold air flow 200 either towards opening 13 or towards another outlet opening 16. -
Outlet openings back wall 3a andfront wall 3 ofcabinet 1. Pressure in the condensation circuit is thus reduced through a greater flow ofcooling air 200. - In addition to this the temperature of
air flow 200 achieved during the operation ofheat exchanging device 6 is reduced. - One of two
openings -
Figures 6 to 8 show a diagrammatical view of a laundry drying machine according to an embodiment of the invention. - The said machine comprises a circuit for the partial diffusion of
air flow 200 withincabinet 1 of the laundry drier after the said flow has passed throughheat exchanger 6. - The said circuit comprises
ducts duct 301, which extends vertically and parallel tofront wall 3 of the machine, is connected to connectingstructure 19 dischargingcold air 200 to the exterior. - Duct 302 is located in the upper part of the laundry drier, parallel to a
covering panel 303 and in the embodiment illustrated inFigures 6 and 7 is therefore perpendicular toduct 301 with which it is connected for the passage of the flow of air. - Duct 302 is provided with
nozzles 304 in order to diffusecold air 200 within the cabinet of the laundry drying machine, preferably in the direction of the electrical and/or electronic components, indicated diagrammatically by 305, involving control of the machine in such a way as to prevent the formation of condensation upon them or in their vicinity and to prevent them from overheating. - As an alternative
vertical duct 301 may also be provided withair diffusing nozzles 304 located along its axial length. - The flow from
nozzles 304 may be gauged in relation to the size of the electronic and electrical controls and the size of the part of the machine to which the flow is directed in order to prevent condensation phenomena. - Preferably
duct 302 may adopt positions which are angularly displaced in a plane parallel to coveringpanel 303 of the machine according to requirements, as indicated by dashed lines inFigure 7 . - For this purpose
vertical duct 301 will be mounted on the machine in such a way as to be angularly movable about its own longitudinal axis. - Further modifications and variants may be made to the machines and devices illustrated above without thereby going beyond the scope of the invention as claimed below.
Claims (5)
- Laundry drying machine comprising a drum (5) to contain the laundry requiring drying, means (8, 9) for delivering heated air (100) capable of drying the laundry within the said drum (5), an inlet (11) for cold air (200) originating from outside the machine, heat exchanger means (6) through which air (100) originating from the drum (5) passes and is cooled by the said cold air (200) originating from the exterior, at least one tank (10) for the collection of condensation water produced by said heat exchanger means (6), at least one outlet (13, 16) for cold air, and duct means (20, 21) to provide a path for drawing the said cold air (200) away from the said heat exchanger means (6) after having passed through the same and deliver it to said at least one outlet (13, 16), wherein
the air originating from the drum and passing through the heat exchanger means is cooled by a flow of cold air (200) obtained from the exterior through the inlet (11) by a fan (7) and passed to the heat exchanger means (6) through a duct (12),
said duct means (20, 21) comprises a duct (20) connected between said heat exchanger means (6) and an outlet opening (13) in the machine, wherein said duct (20) discharges the flow of cold air outside the machine through the outlet opening, the flow of cold air being used to cool, in the heat exchanger means, the heated air originating from the drum, and wherein the duct (20) for discharging the flow of cold air and the duct (12) for passing the cold air from the fan to the heat exchanger means create a ducted route for the flow of air drawn in from the exterior through the inlet (11), said ducted route remaining isolated from a duct (8) for delivering heated air within the said drum and from the other components of the machine, characterised in that
the machine further comprises a circuit for diffusing part of the flow of cold air (200) after this has passed through said heat exchanger means (6), at least in the upper internal part of the cabinet (1) of the machine in the vicinity of the electrical and/or electronic components designed to control the machine. - Machine according to claim 1, characterised in that it comprises two outlets (13, 16) for the said cold air (200) one located within the front wall (3) and the other located in the back wall (3a) of the machine, the said duct means comprising a duct (21) connecting between the said heat exchanger means (6) and the said two outlets (13,16).
- Machine according to claim 1, characterised in that the said circuit for diffusing part of the cold air flow within the cabinet (1) comprises at least a first duct (301) which extends vertically in parallel to the front wall of the machine, the said duct being hydraulically connected to the connecting structure (19) of the discharge of the cold air flow (200) to the exterior, and at least one second duct (302) connected hydraulically to the former located parallel to the upper cover panel (303) of the cabinet (1) of the machine in the vicinity thereof.
- Machine according to any one of claims 1 and 3, characterised in that said first and second ducts (301, 302) are provided with air diffusing nozzles (304).
- Machine according to any one of claims 1 and 3, characterised in that the second duct (302) parallel to the said upper closure panel (303) of the cabinet (1) of the machine can be moved angularly about the longitudinal axis of the said first duct (301) in a plane parallel to the said panel (303).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06425796.7A EP1925712B2 (en) | 2006-11-24 | 2006-11-24 | Laundry drier with circuit to limit internal condensation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06425796.7A EP1925712B2 (en) | 2006-11-24 | 2006-11-24 | Laundry drier with circuit to limit internal condensation |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1925712A1 EP1925712A1 (en) | 2008-05-28 |
EP1925712B1 EP1925712B1 (en) | 2011-11-30 |
EP1925712B2 true EP1925712B2 (en) | 2017-03-29 |
Family
ID=37964751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06425796.7A Active EP1925712B2 (en) | 2006-11-24 | 2006-11-24 | Laundry drier with circuit to limit internal condensation |
Country Status (1)
Country | Link |
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EP (1) | EP1925712B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100034077A (en) * | 2008-09-23 | 2010-04-01 | 삼성전자주식회사 | Clothing dryer |
IT1396208B1 (en) * | 2009-10-20 | 2012-11-16 | Candy Spa | APPLIANCES WITH A PERFECTED CONDENSER COOLING SYSTEM |
EP2423378B1 (en) * | 2010-08-25 | 2013-04-17 | Electrolux Home Products Corporation N.V. | Laundry treating machine |
EP2423371A1 (en) | 2010-08-25 | 2012-02-29 | Electrolux Home Products Corporation N.V. | Laundry treating machine |
US11851807B2 (en) | 2019-11-07 | 2023-12-26 | Whirlpool Corporation | Method of removing heat from a clothes tumbling system on the outside of the cabinet |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7305709U (en) † | 1973-05-30 | Licentia Gmbh | Clothes dryer | |
GB2026147A (en) † | 1978-07-20 | 1980-01-30 | Licentia Gmbh | Laundry drier |
DE2923701A1 (en) † | 1979-06-12 | 1980-12-18 | Hermann Zanker Kg Maschinen Un | Electric clothes dryer - using condenser with heat exchanger foil separating drying and cooling air streams |
US4489507A (en) † | 1981-10-09 | 1984-12-25 | Tokyo Shibaura Denki Kabushiki Kaisha | Drying apparatus |
EP0254018A1 (en) † | 1986-07-25 | 1988-01-27 | INDUSTRIE ZANUSSI S.p.A. | Condensation laundry drying machine |
JPH02302299A (en) † | 1989-05-17 | 1990-12-14 | Matsushita Electric Ind Co Ltd | Dehumidifying type cloth dryer |
JPH05154296A (en) † | 1991-12-02 | 1993-06-22 | Matsushita Electric Ind Co Ltd | Dehumidification type dryer for clothes |
JPH07275585A (en) † | 1994-04-13 | 1995-10-24 | Nippon Kentetsu Co Ltd | Clothes drying machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2664301B1 (en) * | 1990-07-05 | 1992-09-11 | Ciapem | DRYER WITH ROTARY HEAT EXCHANGER. |
DE19508244A1 (en) * | 1995-03-08 | 1996-09-12 | Aeg Hausgeraete Gmbh | Condensing clothes dryer with low cost system preventing condensate overflow |
IT1275910B1 (en) * | 1995-03-09 | 1997-10-24 | Candy Spa | CONDENSATION DRYER WITH CONDENSATE RECOVERY IN CONTAINER |
KR100487329B1 (en) * | 2002-10-10 | 2005-05-03 | 엘지전자 주식회사 | Condensing Type Clothes Drier and Controlling the Same |
-
2006
- 2006-11-24 EP EP06425796.7A patent/EP1925712B2/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7305709U (en) † | 1973-05-30 | Licentia Gmbh | Clothes dryer | |
GB2026147A (en) † | 1978-07-20 | 1980-01-30 | Licentia Gmbh | Laundry drier |
DE2923701A1 (en) † | 1979-06-12 | 1980-12-18 | Hermann Zanker Kg Maschinen Un | Electric clothes dryer - using condenser with heat exchanger foil separating drying and cooling air streams |
US4489507A (en) † | 1981-10-09 | 1984-12-25 | Tokyo Shibaura Denki Kabushiki Kaisha | Drying apparatus |
EP0254018A1 (en) † | 1986-07-25 | 1988-01-27 | INDUSTRIE ZANUSSI S.p.A. | Condensation laundry drying machine |
JPH02302299A (en) † | 1989-05-17 | 1990-12-14 | Matsushita Electric Ind Co Ltd | Dehumidifying type cloth dryer |
JPH05154296A (en) † | 1991-12-02 | 1993-06-22 | Matsushita Electric Ind Co Ltd | Dehumidification type dryer for clothes |
JPH07275585A (en) † | 1994-04-13 | 1995-10-24 | Nippon Kentetsu Co Ltd | Clothes drying machine |
Also Published As
Publication number | Publication date |
---|---|
EP1925712A1 (en) | 2008-05-28 |
EP1925712B1 (en) | 2011-11-30 |
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