EP2594689A1 - Wäschetrockner - Google Patents

Wäschetrockner Download PDF

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Publication number
EP2594689A1
EP2594689A1 EP11189816.9A EP11189816A EP2594689A1 EP 2594689 A1 EP2594689 A1 EP 2594689A1 EP 11189816 A EP11189816 A EP 11189816A EP 2594689 A1 EP2594689 A1 EP 2594689A1
Authority
EP
European Patent Office
Prior art keywords
basement
machine
air path
air
lower side
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.)
Withdrawn
Application number
EP11189816.9A
Other languages
English (en)
French (fr)
Inventor
Marco Santarossa
Marcin Lorenc
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 Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP11189816.9A priority Critical patent/EP2594689A1/de
Publication of EP2594689A1 publication Critical patent/EP2594689A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the present invention concerns the technical field of laundry treating machines, especially laundry drying machines.
  • the present invention refers to laundry drying machines of the condenser type.
  • Laundry treating machines capable of carrying out a drying process on laundry generally comprise a casing that houses a laundry container, like a rotating drum, where laundry to be treated is received, a basement portion having seats for receiving machine operational devices, and an air circuit for carrying out drying operation by circulating hot air through the laundry container.
  • Air circulating means and heating means are provided in the air circuit for circulating and heating drying air, respectively.
  • condensing means are further provided in the air circuit for removing moisture from drying air passing through articles to be treated thereby allowing said air to be recirculated cyclically within the air circuit. Moisture removed from articles is either collected in a tank periodically emptied by a user or it is directly exhausted by a pipe connected to a waste water net.
  • Washing-drying appliances i.e. appliances provided for performing articles washing and drying operations in a single machine are also known and generally comprise a water circuit including pumping means for allowing washing water to be supplied to a laundry treating chamber and a drying arrangement as described before for drying laundry.
  • Typical examples comprise an air-air heat exchanger.
  • Such condensing means require to be cooled in order to constantly provide a cold surface where wet drying air can be condensed.
  • air taken from dryer machine surroundings is used as cooling means.
  • a plurality of conduits are provided on the lower portion of the laundry drying machine and, generally, a basement portion is appropriately designed to form at least a portion of cooling conduits.
  • cooling conduits are generally formed on the upper side of machine basement, i.e. on the basement side facing the laundry container.
  • Such construction is particularly disadvantageous because it complicates the arrangement of further machine operating devices like air pumping means, motor means and so on.
  • a further drawback of such prior art laundry drying machines consists in that the position of air conduits on basement upper side causes the air ports on machine casing walls to be either placed at a high position relative to the machine resting surface or to be placed on lower region of casing lateral wall by complicatedly connecting them with air conduits. This arrangement definitely determines an efficiency reduction and therefore an increases in power losses.
  • the aim of the present invention is therefore to solve the noted drawbacks and thus providing a laundry drying machine having an improved basement arrangement.
  • An object of the present invention is to provide a laundry treating machine with a basement having a more compact and rational design that improves arrangement of machine operational devices thereon.
  • Another object of the present invention is to provide a laundry drying machine suitable for carrying out a drying process on laundry having an improved performance in cooling condensing means, said laundry drying machine ensuring an efficient cooling air flow.
  • a further object of the invention is to provide a laundry drying machine producing a low noise during working operation compared to laundry treating machine of known type.
  • Another object of the invention is to provide a laundry drying machine which is easy to be assembled.
  • a laundry drying machine comprising a laundry container suitable for receiving the laundry to be dried, a basement having an upper side and a lower side opposite to the upper side, an extractable tank disposed in the basement for the collection of condensation water formed by a heat exchanger, wherein the lower side of the basement forms an inlet air path for air to be conveyed to the heat exchanger and an outlet air path for air to be expelled from the heat exchanger it is possible to obtain a more compact and rational design of the basement itself.
  • the present invention relates, in a first aspect thereof, to a laundry drying machine comprising:
  • the lower side of the basement is the side of the basement which faces the floor on which the laundry drying machine is installed.
  • a bottom sheet is associated to the lower side of the basement such that at least one hollow space is formed therein to define at least a portion of one of the air paths.
  • a first bottom sheet is associated to said lower side of the basement such that a first hollow space is formed therein to define at least a portion of the inlet air path and a second bottom sheet is associated to the lower side of the basement such that a second hollow space is formed therein to define at least a portion of the outlet air path.
  • an air passage is formed at the bottom of the lower side of the basement.
  • an air passage is formed at the bottom of the lower side of the basement to communicate with the second hollow space.
  • the extractable tank is arranged in the lower side of the basement between the inlet air path and the outlet air path.
  • the extractable tank separates the inlet air path from the outlet air path.
  • the inlet air path and the outlet air path comprise respective air conduits, such air conduits being separated by the extractable tank.
  • the air flow direction along the separated air conduits is opposite.
  • the extractable tank is slidably arranged on the lower side of the basement.
  • the extractable tank is arranged below the heat exchanger.
  • the inlet air path comprises an inlet aperture and/or the outlet air path comprises an outlet aperture.
  • the inlet aperture is provided on a front wall of a casing.
  • the outlet aperture is provided on the front wall of the casing.
  • the basement comprises a conveyor for driving the inlet air path from the lower side to the upper side towards the heat exchanger.
  • the basement comprises a conveyor for driving the outlet air path from the upper side to the lower side.
  • the basement comprises further seats for receiving operational devices that comprise at least one of the following: motor means, fluid compressing means, heat exchanging means, fluid condensing and/or evaporating means, a portion of a heat pump circuit.
  • operational devices comprise at least one of the following: motor means, fluid compressing means, heat exchanging means, fluid condensing and/or evaporating means, a portion of a heat pump circuit.
  • the basement comprises one or more ducts so as to direct part of the inlet air path or part of the outlet air path towards said one or more further seats for cooling said one or more further seats.
  • the basement comprises an upper shell and a lower shell connected one to the other and the lower shell comprises said upper side and said lower side.
  • the lower shell of the basement comprises/defines/forms the lower side of the basement and the extractable tank is slidably arranged on the lower side of lower shell.
  • the lower shell of the basement comprises/defines/forms the lower side of the basement and the bottom sheets are removably mounted onto the lower side of the lower shell.
  • the lower shell of the basement comprises/defines/forms the upper side of the basement and the condensing means rests on the upper side of the lower shell of the basement.
  • the heat exchanger is an air-air heat exchanger.
  • the machine of the invention is a combined laundry washing and drying machine.
  • the present invention has proved to be particularly successful when applied to laundry drying machines of the condenser type. It should in any case be underlined that the present invention is not limited to this type of application. On the contrary, the present invention can be usefully applied to all the machines requiring a drying phase for wetted clothes, as for example a combined laundry washing and drying machine.
  • a laundry drying machine 1 comprises a casing 10 formed by two couples of upright side walls 2 arranged perpendicularly one another, respectively on the drying machine rear and front part, and on the lateral side thereof.
  • a lateral side walls has been removed for showing some of the laundry drying machine parts accommodated within casing 10.
  • An upper wall portion, not illustrated, and a bottom portion 4 close the ends of the box-like structure formed by the upright side walls 2 joined together.
  • a laundry container 6 comprising a rotatably drum 7 is provided within the casing 10.
  • a user control interface, not illustrated, is preferably arranged on the top of the casing 10 for input of laundry drying programs and displaying machine working conditions.
  • the bottom portion 4 of the laundry drying machine 1 comprises a basement 14.
  • the basement 14 is preferably made by two portions, an upper shell 14a and a lower shell 14b as shown in Figures 8 and 9 , which are properly connected one to the other, preferably by means of screws.
  • the basement 14, and in particular the two shells 14a, 14b, is preferably made of polymeric material.
  • Two bottom sheets 4a, 4b are removably mounted onto a lower side 16 of the basement 14.
  • the lower side 16 of the basement 14 is the side of the basement 14 which faces the floor on which the laundry drying machine 1 is installed.
  • the lower shell 14b of the basement 14 comprises/defines/forms the lower side 16 of the basement 14 and the bottom sheets 4a, 4b are removably mounted onto the lower side 16 of the lower shell 14b
  • the laundry drying machine 1 of the invention is of the condenser type and comprises condensing means 19 arranged in a drying air circuit passing through the laundry container 6.
  • the hot air produced along the drying air circuit removes moisture from laundry in the container 6 and the hot moist air passes through the condensing means 19.
  • condensing means 19 are in the form of an air-air cross-flow type heat exchanger, as shown in Figure 10 .
  • the moist air passing through the condensing means 19 is cooled by an air cooling flow passing through the condensing means 19 itself.
  • the cooled air is then conveyed again to the drying air circuit.
  • the moist air and the cooled air are driven along ducts which are defined by the shape of the basement 14, and in particular by the shape of the upper and lower shells 14a, 14b.
  • condensation water is formed and advantageously collected in an extractable moisture tank 9 located beneath the heat exchanger 19.
  • the moisture tank 9 is preferably in the form of a drawer slidably arranged on the lower side 16 of the basement 14 so that it can be easily and periodically emptied by a user.
  • the air cooling flow for the heat exchanger 19 is advantageously provided on the bottom portion 4 of the laundry drying machine 1.
  • the air cooling flow is preferably conveyed inside the casing 10 through an inlet aperture 11A and discharged outside the casing 10 exhausted through an outlet aperture 11B.
  • the apertures 11A and 11B are preferably arranged in the front upright side wall 2, as shown in Figure 1 .
  • the air cooling flow is divided into two portions, namely an inlet air path for air to be conveyed to said heat exchanger 19 and an outlet air path for air to be expelled from said heat exchanger 19, as indicated by arrows "I" and "O" in Figures.
  • apertures of the air cooling flow may be arranged on different upright side walls 2 other than the laundry drying machine front wall.
  • Part of the inlet air path I and part of the outlet air path O are defined by the lower side 16 of the basement 14 and the bottom sheets 4a, 4b which delimit hollow spaces 38a, 38b adapted to convey cooling air I inside the machine 1 and discharge exhausted cooling air O outside the machine 1.
  • the moisture tank 9 is preferably arranged between the inlet air path I and the outlet air path O in the lower side 16 of the basement 14.
  • bottom sheets 4a, 4b and a bottom side 9a of the moisture tank 9 rest on the same level of a lower edge 39 of basement 14 that surrounds the hollow spaces 38a, 38b.
  • the hollow spaces 38a, 38b are upwardly limited by surfaces placed on a higher level relative to the lower edge 39.
  • seats 18A-18F are formed for receiving therein operational devices 5 of the laundry drying machine 1, like the condensing means 19, air pumping means 20, motor means for powering air pumping means 20 and other functional devices for operating laundry drying machine 1 to carry out a drying treatment on laundry as, for example, heat pump circuit components (not shown in the Figures) like fluid compressing means, heat exchanging means, fluid condensing and/or evaporating means.
  • basement 14 comprises a lower side 16 forming at least a portion of a first air path wherein the air is drawn in from outside the machine 1 and/or the air is exhausted outside the machine 1 and further comprises an upper side 17 forming at least a portion of a second air path that passes through one or more of said operational devices 5, and in particular through the condensing means 19.
  • the lower shell 14b of the basement 14 comprises/defines/forms the upper side 17 of the basement 14 and the condensing means 19 rests on the upper side 17 of the lower shell 14b of the basement 14.
  • the bottom sheet 4a when the bottom sheet 4a is associated under the basement 14 facing the lower side 16 of the latter, the bottom sheet 4a substantially covers the hollow space 38a formed in the lower side 16 of basement 14 thereby forming an inlet conduit 15 for conveying air entering the laundry drying machine 1 through the inlet aperture 11A.
  • Such conduit 15 has a lower surface 15A defined by the bottom sheet 4a and upper surfaces 15B that are defined by the basement 14 itself through the surfaces upwardly limiting the hollow space 38a formed in the basement 14 lower side 16, as better shown in Figure 5 .
  • Conduit 15 sucks air taken from outside by pumping means 20 for cooling condensing means 19 resting within seat 18A.
  • the seat 18A is defined by respective hollow portions of the upper shell 14a and of the lower shell 14b.
  • Pumping means 20 are powered though an electric motor (not shown) housed in the seat 18B which is formed in the upper side 17 of basement 14. Said motor powers also further pumping means 51, shown in Figure 10 , that are arranged coaxially with pumping means 20 and received within seat 18D to circulate drying air through the laundry container 6. Motor means are therefore interposed between pumping means 20 of the cooling air and the pumping means 51 for circulating drying air inside the container 6. Rotational axis of the electric motor shaft extends parallel to the air flow path within conduit 15.
  • Pumping means 20 that preferably comprises a centrifugal fan, are arranged on a level of the basement 14 that extends just over conduit 15 that rests on a lower level, therefore air path along conduit 15 is reversed and lead to said level by means of a conveyor 21, partially shown in Figures 10 and 12 , arranged between the pumping means 20 and the conduit 15.
  • Conveyor 21 is preferably made of felt and it is designed to reduce flow resistance when the air reverses its path of about 180 degrees increasing its height relative to the floor where the laundry drying machine 1 rests. In this way performance of the laundry drying machine 1 is not negatively affected, while an improved compactness in distributing operational devices on the basement 14 may be achieved.
  • volute 31 surrounds the pumping means 20.
  • volute 31 is formed by a portion 26 of basement 14 and by a cover 32 which is removably attached to portion 26 thereby closing seat 18C.
  • the portion 26 is preferably defined by the lower shell 14b of the basement 14 and the cover 32 is removably attached to the portion 26.
  • the cover 32 may be integrally made with the upper shell 14a.
  • Air sucked by pumping means 20 is output centrifugally from the latter and directed towards condensing means 19 thanks to the volute 31, as shown by arrows "I" in Figures 10 and 11 .
  • condensing means 19 are in the form of an air-air cross-flow type heat exchanger.
  • air passes through condensing means 19 its path lies on an upper level compared to the air flowing within conduit 15. Even the flow direction of air within conduit 15 is substantially perpendicular to that of air flowing through condensing means 19.
  • Seat 18A, that houses condensing means 19, is shaped to diffuse air coming out from pumping means 20 to the whole surface of condensing means 19.
  • FIG 11 it is shown from a rear view of the basement 14 the air path flowing through condensing means 19 and then downwardly towards the bottom sheet 4b.
  • Air O that exits condensing means 19 is guided from said upper side 17 to the lower side 16 of basement 14 by means of a conduit portion 40, or conveyor, formed in the basement 14, for example by joining a cover 40a to the upper shell 14a of the basement 14.
  • Air conveyed by conduit portion 40 is also reversed in its flow direction of about 180 degrees and it is then received in an outlet conduit 34 which is formed in a manner similar to inlet conduit 15, i.e.
  • FIG. 12 Another view of air path O leaving condensing means 19 for entering outlet conduit 34 is shown in Figure 12 .
  • Outlet conduit 34 leads exhausted air from condensing means 19 to exit laundry drying machine 1 through the outlet aperture 11B, as indicated by arrow O in Figures. In Figure 12 the outlet conduit 34 has been partly cut away.
  • Outlet conduit 34 and inlet conduit 15 are separated by the moisture tank 9 when the latter is positioned in its working position.
  • the moisture tank 9 is advantageously slidable associated to a housing 54 in the lower portion 16 of the basement 14 by means of guiding portions 52, 53, as shown in Figure 7 .
  • the guiding portions 52, 53 are defined by respective separating walls which separates the housing 54 from the respective conduits 15, 34. Openings 57, 58 in said separating walls 52, 53 are provided in order to reduce the weight of the basement 14.
  • the separating walls 52, 53 may have a closed structure, i.e. without openings 57, 58.
  • the separation between the air I for the condensing means 19 and the exhausted air O coming from the condensing means 19 is guaranteed by the separating walls 52, 53 themselves, independently of the presence of the tank 9.
  • Condensation water formed in the condensing means 19 is advantageously conveyed to the moisture tank 9 through a connecting device.
  • the connecting device preferably comprises a male portion or female 60, visible in Figures 7 and 8 , which is inserted in a corresponding female or male portion of the moisture tank 9, not visible in the Figures.
  • the male portion 60 preferably comprises a valve, not illustrated, which is opened when the moisture tank 9 is in its working position and is automatically closed when the moisture tank 9 is removed from the housing 54, so as to avoid water leakage.
  • the moisture tank 9 has advantageously a parallelepiped shape and is arranged below the condensing means 19 (i.e. the moisture tank 9 lies at a lower height level than the condensing means 19) and in the central part of the lower portion 16 of the basement 14, i.e. substantially symmetrically positioned with respect the basement 14. Nevertheless, in different embodiments the moisture tank may have a different shape, it may also be asymmetrically placed with respect the basement.
  • air passages 12 are formed as openings at the bottom of the lower side 16 of the basement 14.
  • the exhausted air from the condensing means 19 is advantageously conveyed also through these air passages 12 to be expelled outside the casing 10 of the machine 1, as indicated by arrow "O1" in Figures 11 and 12 .
  • Such air passages 12 are always accessible to air because the lower side 16 of the basement 14 extends in a position that is spaced apart and substantially parallel to a floor on which the laundry drying machine 1 is placed.
  • the distance between the lower side 16 of the basement 14 and the floor is determined in an adjustable manner through vertically adjustable supports 13 placed under the casing 10.
  • air passages 12 at the bottom of the lower side 16 of the basement 14 may be the only apertures for allowing exhausted air O coming from the heat exchanger 19 to be expelled to the outside.
  • these air passages 12 in the lower side 16 of the basement 14 ensures to provide the laundry drying machine 1 with at least an outlet air path O1 independently of the position where said machine 1 is placed, i.e. without worrying about any items that may obstruct the outlet aperture 11B arranged in the front upright side wall 2.
  • provision of air passages 12 allows noise produced by the laundry drying machine 1 when moving air mass to be greatly reduced, thereby allowing the machine 1 to be placed and operated close to rooms where low noise or silent is required, especially during night hours.
  • the upper surfaces 15B, 34B of the conduits 15, 34 can comprise one or more opening so as a part of the air flowing along the lower side 16 of the basement 14 may flow into at least one of the seats 18B-18F for cooling purpose, for example to cool an electric motor or heat pump circuit components.
  • a laundry drying machine according to the invention has an efficient arrangement for its basement which enhances layout of operational devices and air path formed thereon. Thanks to the basement arrangement according to the invention, noise produced by a laundry drying machine for moving air mass can be greatly lowered, thereby allowing the machine to be placed and operated close to rooms where low noise or silent is required.
  • the present invention allows all the set objects to be achieved.
  • it makes it possible to obtain a laundry treating machine with a basement having a more compact and rational design with respect the known technique.
  • inlet air passages may be provided in the lower side of the basement so that air may be drawn in from outside the machine not only from the front aperture 11A.
  • Such inlet air passages are always accessible to air, as explained before with reference to the outlet passages 12.
EP11189816.9A 2011-11-18 2011-11-18 Wäschetrockner Withdrawn EP2594689A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11189816.9A EP2594689A1 (de) 2011-11-18 2011-11-18 Wäschetrockner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11189816.9A EP2594689A1 (de) 2011-11-18 2011-11-18 Wäschetrockner

Publications (1)

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EP2594689A1 true EP2594689A1 (de) 2013-05-22

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EP11189816.9A Withdrawn EP2594689A1 (de) 2011-11-18 2011-11-18 Wäschetrockner

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105780417A (zh) * 2015-01-13 2016-07-20 Lg电子株式会社 烘干机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3135292A1 (de) * 1981-09-05 1983-03-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt "kunststofftragkoerper fuer einen waeschetrockner"
EP0434169A2 (de) * 1989-12-22 1991-06-26 OCEAN S.p.A. Herstellungsverfahren und verbesserter Trommeltrockner
GB2258720A (en) * 1991-08-15 1993-02-17 Creda Ltd Tumble dryer
US20070251117A1 (en) * 2006-05-01 2007-11-01 Blount Daniel R Clothes dryer utilizing an air intake source from the exterior of a structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3135292A1 (de) * 1981-09-05 1983-03-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt "kunststofftragkoerper fuer einen waeschetrockner"
EP0434169A2 (de) * 1989-12-22 1991-06-26 OCEAN S.p.A. Herstellungsverfahren und verbesserter Trommeltrockner
GB2258720A (en) * 1991-08-15 1993-02-17 Creda Ltd Tumble dryer
US20070251117A1 (en) * 2006-05-01 2007-11-01 Blount Daniel R Clothes dryer utilizing an air intake source from the exterior of a structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105780417A (zh) * 2015-01-13 2016-07-20 Lg电子株式会社 烘干机
EP3045581A1 (de) * 2015-01-13 2016-07-20 LG Electronics Inc. Trocknungsmaschine
RU2626952C2 (ru) * 2015-01-13 2017-08-02 ЭлДжи ЭЛЕКТРОНИКС ИНК. Сушильная машина
CN105780417B (zh) * 2015-01-13 2018-06-05 Lg电子株式会社 烘干机
US10544540B2 (en) 2015-01-13 2020-01-28 Lg Electronics Inc. Drying machine

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