EP2527526A1 - Wäschetrockner mit Drehtrommel - Google Patents

Wäschetrockner mit Drehtrommel Download PDF

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Publication number
EP2527526A1
EP2527526A1 EP11167977A EP11167977A EP2527526A1 EP 2527526 A1 EP2527526 A1 EP 2527526A1 EP 11167977 A EP11167977 A EP 11167977A EP 11167977 A EP11167977 A EP 11167977A EP 2527526 A1 EP2527526 A1 EP 2527526A1
Authority
EP
European Patent Office
Prior art keywords
socle
supporting base
air
lower supporting
pass
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
Application number
EP11167977A
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English (en)
French (fr)
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EP2527526B1 (de
Inventor
Alessandro Vian
Paolo Ros
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Electrolux Home Products Corp NV
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Electrolux Home Products Corp NV
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Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP11167977.5A priority Critical patent/EP2527526B1/de
Publication of EP2527526A1 publication Critical patent/EP2527526A1/de
Application granted granted Critical
Publication of EP2527526B1 publication Critical patent/EP2527526B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 
    • 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 
    • D06F58/206—Heat pump arrangements

Definitions

  • the present invention relates to a rotary-drum laundry dryer.
  • the present invention relates to a rotary-drum home laundry dryer, to which the following description refers purely by way of example without implying any loss of generality.
  • today's rotary-drum home laundry dryers comprise: a substantially parallelepiped-shaped outer boxlike casing structured for resting on the floor; a substantially cylindrical revolving drum structured for housing the laundry to be dried, and which is housed in axially rotating manner inside the casing to rotate about its horizontally-oriented longitudinal axis, directly facing a laundry loading/unloading opening formed in the front wall of the casing; a porthole door hinged to the front wall of the casing to rotate to and from a closing position in which the door rests completely against the front wall of the casing to close the laundry loading/ unloading opening and airtight seal the revolving drum; and an electric motor assembly structured for driving into rotation the revolving drum about its longitudinal axis inside the casing.
  • Home laundry dryers of the above type are also provided with an open-circuit or closed-circuit, hot-air generator which is structured to circulate inside the revolving drum a stream of hot air having a low moisture content, and which flows through the revolving drum and over the laundry inside the drum to rapidly dry the laundry; and with an electronic central control unit which controls both the motor assembly and the hot-air generator to perform one of the user-selectable drying cycles stored in the same central control unit.
  • the hot-air generator is usually a closed-circuit, heat-pump type, hot-air generator that comprises: an air recirculating conduit having its two ends fluidly connected to the revolving drum, on opposite sides of the latter; a fan located along the air recirculating conduit to produce, inside the latter, an airflow which flows through the revolving drum; and finally a heat-pump assembly having its two heat exchangers located one after the other, along the air recirculating conduit.
  • EP-2034084 discloses a heat-pump type, rotary-drum home laundry dryer having a closed-circuit, heat-pump type, hot-air generator of the type referred above.
  • hot-air generator Since the two air/refrigerant heat exchangers of the heat-pump type, hot-air generator are housed inside the air recirculating conduit, one downstream the other, whereas the refrigerant compressing device and the refrigerant expansion device of the heat-pump type, hot-air generator are located outside the air recirculating conduit, several pass-through openings are formed on the lateral wall of the air recirculating conduit to allow the passage of a number of connecting pipes that channel the refrigerant to and from the air/refrigerant heat exchangers. Unknowingly, these pass-through openings cause significant leaks of drying process air.
  • Aim of the present invention is to simplify the structure of today's laundry dryers, so to simplify the assembly of the laundry dryer and to improve efficiency of the closed-circuit, heat-pump type, hot-air generator.
  • a Further aim of the present invention is to significantly reduce the leaks of drying process air.
  • a rotary-drum laundry dryer comprising a revolving drum adapted to receive laundry to be dried, a hot-air generator structured to circulate an airflow through said revolving drum, and a lower supporting base or socle which is structured for resting on the floor and for housing at least part of the hot-air generator;
  • the hot-air generator comprising: an air recirculating conduit allowing said airflow to flow through the revolving drum and through at least one heat exchanger located along said air recirculating conduit for condensing moisture inside the airflow; a segment of the air recirculating conduit extending across the lower supporting base or socle, and being structured so as to house said at least one heat exchanger;
  • said lower supporting base or socle being furthermore provided with one or more pass-through openings through which corresponding elongated members stick out of said segment of the air recirculating conduit;
  • the laundry dryer being characterized by comprising an auxiliary lid or cover which is structured for being associated onto the lower supporting base or so
  • the rotary-drum laundry dryer is characterized in that said auxiliary lid or cover is shaped so to at least partly surround/embrace, when fixed on the lower supporting base or socle, the at least one elongated member that sticks out of the corresponding pass-through opening.
  • the rotary-drum laundry dryer is characterized in that said auxiliary lid or cover is shaped/structured to cover all pass-through openings on the lower supporting base or socle, to at least partly cover/close the gap formed between the edge of the lower supporting base or socle delimiting each pass-through opening and the at least one elongated member that sticks out of the lower supporting base or socle through the corresponding pass-through opening.
  • the rotary-drum laundry dryer is characterized in that said auxiliary lid or cover is associated to the lower supporting base or socle via snap-on locking means.
  • the rotary-drum laundry dryer is characterized in that the lower supporting base or socle comprises a lower half-shell which is structured for resting on the floor, and at least one upper half-shell which is structured/ shaped for being stacked up on top of, and rigidly coupled to, said lower half-shell, so to form at least a portion of said segment of the air recirculating conduit; the pass-through openings of the lower supporting base or socle consisting in one or more pass-through slots or recesses made on the lower half-shell and/or on the at least one upper half-shell, along a coupling edge between said half-shells.
  • the rotary-drum laundry dryer is characterized in that the lower half-shell and the at least one upper half-shell are made of plastic material via an injection molding process.
  • the rotary-drum laundry dryer is characterized in that said auxiliary lid or cover comprises an elongated plate element which is structured for being fixed on the outer surface of the lower supporting base or socle, immediately upwards and crosswise of a plurality of pass-through openings of the lower supporting base or socle; and a number of substantially hook-shaped winglets each of which protrudes from said elongated plate element towards a corresponding beneath-located pass-through opening, and is shaped to at least partly surround/embrace the elongated member that sticks out of said beneath-located pass-through opening.
  • the rotary-drum laundry dryer is characterized in that a side edge of the elongated plate element of said auxiliary lid or cover is insertable into a number of vertical pass-through slits or grooves made on top end of a number of protruding appendixes that jut out from the lower supporting base or socle.
  • the rotary-drum laundry dryer is characterized in that the elongated plate element of said auxiliary lid or cover also comprises a number of substantially hook-shaped clip means that protrude from a same face of the elongated plate element.
  • the rotary-drum laundry dryer is characterized in that at least one of the hook-shaped winglets of said auxiliary lid or cover is provided with one or more snap-on locking splines that protrudes from the distal end of the winglet main body remaining locally substantially perpendicular to the reference laying plane of the same winglet; each locking spline is shaped to hook onto the side edge of the lower supporting base or socle delimiting the pass-through opening to be closed, so as to hold the hook-shaped winglet locally adherent to the outer surface of the lower supporting base or socle.
  • the rotary-drum laundry dryer is characterized in that said auxiliary lid or cover is made of plastic material by an injection molding process.
  • the rotary-drum laundry dryer is characterized in that the hot-air generator is a heat-pump type, hot-air generator which comprises:
  • the rotary-drum laundry dryer is characterized in that said heat-pump type, hot-air generator furthermore comprises a number of connecting pipes that connect the first heat exchanger, the second heat exchanger, the refrigerant compressing device and the refrigerant expansion device to one another; and that at least one of said elongated member consists in one of said connecting pipes
  • the rotary-drum laundry dryer is characterized in that at least one of said elongated member consists in an electric wire or similar that sticks out of the lower supporting base or socle through a pass-though opening.
  • the rotary-drum laundry dryer is characterized in that at least one of said elongated member consists in a sensor, probe and/or other oblong element that extend in pass-through manner across a corresponding pass-through opening.
  • number 1 indicates as a whole a preferably household, rotary-drum laundry dryer which comprises:
  • the rotary-drum laundry dryer 1 additionally comprises an electric motor 5 which is mechanically connected to the revolving drum 3 for driving into rotation the drum 3 about its longitudinal axis; a closed-circuit, hot-air generator 6 which is structured to circulate through the revolving drum 3 a stream of hot air having a low moisture level, and which flows over and rapidly dries the laundry located inside drum 3; and finally an electronic central control unit 7 which controls both the electric motor 5 and the hot-air generator 6 to perform one of the user-selectable drying cycles preferably, though not necessarily, stored in the same central control unit 7.
  • the boxlike casing 2 preferably comprises a substantially parallelepiped-shaped lower supporting base or socle 9 which is structured for resting on the floor and for housing at least part of the hot-air generator 6; and a substantially parallelepiped-shaped upper boxlike cabinet 10 which is rigidly fixed to the top of the lower supporting base or socle 9 and it is structured so as to house the revolving drum 3.
  • the revolving drum 3 preferably extends inside the boxlike cabinet 10 coaxial to a substantially horizontally-oriented longitudinal reference axis L, and rests on a number of substantially horizontally-oriented, front and rear idle supporting rollers 11 which are located in pairs substantially at the two axial ends of the revolving drum 3, and are fixed in free revolving manner to the casing 2 so as to allow the revolving drum 3 to freely rotate about its reference axis L inside the boxlike cabinet 10.
  • the front and rear idle supporting rollers 11 are preferably fixed in free revolving manner directly on top of the lower supporting base or socle 9.
  • the laundry loading/unloading opening of casing 2 is therefore realized in the front wall of the upper boxlike cabinet 10, and the porthole door 4 is hinged to the front wall of the aforesaid upper boxlike cabinet 10.
  • the lower supporting base or socle 9 is also preferably structured so to directly support the electric motor 5.
  • the closed-circuit, hot-air generator 6 instead preferably consists in a heat-pump type, hot-air generator 6 which is structured for gradually drawing air from revolving drum 3; rapidly cooling down the air arriving from revolving drum 3 so to extract and retain the surplus moisture in the air drawn from revolving drum 3; rapidly heating the dehumidified air to a predetermined temperature, normally higher than the temperature of the air from revolving drum 3; and finally feeding the heated, dehumidified air back into the revolving drum 3, where it flows over the laundry inside the drum to rapidly dry said laundry.
  • a heat-pump type, hot-air generator 6 which is structured for gradually drawing air from revolving drum 3; rapidly cooling down the air arriving from revolving drum 3 so to extract and retain the surplus moisture in the air drawn from revolving drum 3; rapidly heating the dehumidified air to a predetermined temperature, normally higher than the temperature of the air from revolving drum 3; and finally feeding the heated, dehumidified air back
  • the hot-air generator 6 provides for continually dehumidifying and heating the air circulating inside revolving drum 3 to rapidly dry the laundry inside the drum, and basically comprises:
  • the first mouth or inlet (not shown) of the air recirculating conduit 12 is preferably integrated in the preferably substantially circular-shaped frame of the boxlike cabinet 10 that defines/delimits the laundry loading/unloading opening.
  • the porthole door 4 when arranged in the closing position, abuts on this peripheral frame so as to substantially airtight seal the laundry loading/unloading opening and, at the same time, put/leave the aforesaid first mouth or inlet of the air recirculating conduit 12 in direct communication with the inside of revolving drum 3.
  • the second mouth or outlet (not shown) of the air recirculating conduit 12 is instead preferably realized/ integrated in the rear wall of the upper boxlike cabinet 10, approximately at the center of the rear rim of revolving drum 3.
  • the heat-pump assembly 14 in turn comprises:
  • Heat-pump assembly 14 is further provided with a number of connecting pipes 19 which connect the two heat exchangers 15 and 16, the refrigerant compressing device 17 and the refrigerant expansion device 18 to one another, so as to allow the refrigerant to continuously flow in closed loop from the refrigerant compressing device 17 in sequence to the second air/refrigerant heat exchanger 16, to the refrigerant expansion device 18, to the first air/refrigerant heat exchanger 15, and finally return back to the refrigerant compressing device 17.
  • the air/refrigerant heat exchanger 15 is conventionally referred to as the "evaporator” or “gas-heater” of the heat-pump assembly 14, and it is structured so that the airflow f arriving from revolving drum 3 and the low-pressure and low-temperature refrigerant directed to the suction of the refrigerant compressing device 17 can flow through it simultaneously, allowing the refrigerant having a temperature lower than that of the airflow f, to absorb heat from the airflow f, thus causing condensation of the surplus moisture in the airflow f arriving from revolving drum 3.
  • the air/refrigerant heat exchanger 16 in turn, is conventionally referred to as the "condenser” or “gas-cooler” of the heat-pump assembly 14, and it is structured so that the airflow f directed back into revolving drum 3 and the high-pressure and high-temperature refrigerant arriving from the delivery of the refrigerant compressing device 17 can flow through it simultaneously, allowing the refrigerant having a temperature greater than that of the airflow f to release heat to the airflow f, thus rapidly heating the airflow f directed back into the revolving drum 3.
  • a central/intermediate segment 12c of the air recirculating conduit 12 extends in pass-through manner across the lower supporting base or socle 9, and the evaporator 15 and condenser 16 of heat-pump assembly 14 are fitted/recessed, one downstream the other along the flowing direction of the airflow f, into said central/intermediate segment 12c of the air recirculating conduit 12.
  • the central/intermediate segment 12c is therefore shaped/dimensioned so as to house both the evaporator 15 and the condenser 16 of the heat-pump assembly 14.
  • the central/ intermediate segment 12c of the air recirculating conduit 12 preferably extends inside the lower supporting base or socle 9 substantially horizontally.
  • refrigerant compressing device 17 and the refrigerant expansion device 18 of heat-pump assembly 14 are preferably fixed/recessed on the lower supporting base or socle 9, beside the central/intermediate segment 12c of the air recirculating conduit 12.
  • the centrifugal fan 13 of hot-air generator 6 is preferably located outside of the lower supporting base or socle 9, preferably at one of the two end-openings of the central/ intermediate segment 12c of air recirculating conduit 12, so to directly communicate with, i.e. be flowingly/ fluidly connected to, both the central segment 12c of the air recirculating conduit 12 and the inside of revolving drum 3.
  • the centrifugal fan 13 is preferably located on the back of the lower supporting base or socle 9, at the exit end-opening or outlet of the central/intermediate segment 12c of the air recirculating conduit 12, i.e. downstream of both evaporator 15 and condenser 16 of heat-pump assembly 14.
  • the lower supporting base or socle 9 of outer casing 2 is preferably formed/composed by a lower half-shell 9a which is structured for resting on the floor, and by an upper half-shell 9b which in turn is structured for being stacked up on top of, and rigidly coupled to, the lower half-shell 9a, so to preferably directly support the upper boxlike cabinet 10 and preferably also the front and rear idle rollers 11 that support in free revolving manner the revolving drum 3.
  • the lower half-shell 9a and the upper half-shell 9b are furthermore shaped so as to form, when coupled to one another, substantially the whole central/intermediate segment 12c of the air recirculating conduit 12 which houses, one downstream the other along the flowing direction of the airflow f, both the evaporator 15 and the condenser 16 of the heat-pump assembly 14.
  • the lower half-shell 9a and the upper half-shell 9b are preferably structured/shaped so as to firmly and unremovably jam/ block in between themselves the evaporator 15 and the condenser 16 of heat-pump assembly 14 when coupled to one another to form/compose the lower supporting base or socle 9 of outer casing 2.
  • the lower half-shell 9a and upper half-shell 9b are shaped so as to form the two halves of the central segment 12c of the air recirculating conduit 12, and are structured for being substantially airtight coupled to one another, so as to compose/form the whole central segment 12c of the air recirculating conduit 12, and contemporaneously directly lock/ensnare in between themselves the evaporator 15 and the condenser 16.
  • the lower half-shell 9a and the upper half-shell 9b are both preferably, though not necessarily, made of plastic material preferably by means of an injection molding process.
  • the lower supporting base or socle 9 is furthermore provided with one or more pass-through openings 19a through which corresponding connecting pipes 19 of the heat-pump assembly 14 stick out of the lower supporting base or socle 9, i.e. out of the central/intermediate segment 12c of the air recirculating conduit 12, to connect the evaporator 15 and condenser 16 to the other devices of heat-pump assembly 14.
  • the laundry dryer 1 is additionally provided with an auxiliary lid or cover 9c which is structured for being associated on the lower supporting base or socle 9, immediately above at least one of the aforesaid pass-through openings 19a, to at least partly cover/close the gap formed between the edge of the lower supporting base or socle 9 delimiting the pass-through opening 19a and the at least one connecting pipe 19 that sticks out of the lower supporting base or socle 9 through the aforesaid pass-through opening 19a.
  • This auxiliary lid or cover 9c serves to prevent/ minimize the air leakages through the gaps formed between the edge of the lower supporting base or socle 9 delimiting the pass-through opening 19a and the at least one connecting pipe 19 that sticks out from the same pass-through opening 19a.
  • the auxiliary lid or cover 9c is shaped so as to at least partly surround/embrace, when fixed on the lower supporting base or socle 9 immediately above at least one of the aforesaid pass-through openings 19a formed on the lower supporting base or socle 9, the at least one connecting pipe 19 that sticks out of said corresponding pass-through opening 19a, to at least partly cover/close the corresponding gap between the connecting pipe 19 and the body of the lower supporting base or socle 9.
  • the auxiliary lid or cover 9c is furthermore removably fixable onto the lower supporting base or socle 9 via snap-on locking means.
  • At least one between the lower half-shell 9a and the upper half-shell 9b has, along the coupling edge with the other complementary half-shell, a number of transversal pass-through slots or recesses 19a which are suitably dimensioned for being engaged in pass-through manner by the connecting pipes 19 of heat-pump assembly 14 that connect the air/refrigerant heat exchangers 15 and 16 to the refrigerant compressing device 17 and the refrigerant expansion device 18.
  • the lower supporting base or socle 9 comprises an auxiliary lid or cover 9c which is structured for being fixed onto the lower half-shell 9a and/or the upper half-shell 9b, immediately above at least one of the pass-through slots or recesses 19a made on said half-shell 9a, 9b, to at least partly cover/close the gap formed between the edge of the half-shell 9a, 9b delimiting the aforesaid pass-through slot or recess 19a and the at least one connecting pipe 19 that sticks out of the same pass-through slot or recess 19a.
  • the auxiliary lid or cover 9c is shaped so as to at least partly surround/embrace, when fixed on half-shells 9a and/or 9b immediately above at least one of the pass-through slot or recess 19a made on said half-shell 9a, 9b, the at least one connecting pipe 19 that sticks out of said pass-through slot or recess 19a, to at least partly cover/close the corresponding gap between the connecting pipe 19 and the local edge of the half-shell 9a, 9b.
  • the auxiliary lid or cover 9c is preferably to be fixed onto the lower half-shell 9a and/or the upper half-shell 9b, after the lower half-shell 9a and the upper half-shell 9b have been coupled to one another to form/ compose the central/intermediate segment 12c of the air recirculating conduit 12 that houses evaporator 15 and condenser 16 of the heat-pump assembly 14.
  • the auxiliary lid or cover 9c is preferably, though not necessarily, shaped so to at least partly cover/close all the pass-through openings 19a made on the lower supporting base or socle 9, so to prevent/minimize the air leakages through the gaps formed between the edge of the lower supporting base or socle 9 delimiting each pass-through opening 19a and the corresponding connecting pipe or pipes 19 sticking out from the same pass-through opening 19.
  • the auxiliary lid or cover 9c is preferably shaped so as to at least partly surround/embrace, when fixed onto the lower half-shell 9a and/or the upper half-shell 9b, all connecting pipes 19 of the heat-pump assembly 14 that stick out through the various pass-through slots or recesses 19a, so as to at least partly close/cover the gap between each connecting pipe 19 and the surrounding body of the half-shell 9a, 9b.
  • all pass-through slots or recesses 19a are preferably formed on the upper half-shell 9b, along the coupling edge 20 of the upper half-shell 9b that is structured for abutting/meshing with the lower half-shell 9a, and the auxiliary lid or cover 9c is fixable onto the upper half-shell 9b, immediately above all pass-through slots or recesses 19a, so as to at least partly surround/embrace, when fixed onto the upper half-shell 9b, all connecting pipes 19 that stick out of the upper half-shell 9b through said pass-through slots or recesses 19a, so to at least partly close/cover the gap between each connecting pipe 19 and the surrounding edge of the half-shell 9a, 9b.
  • the auxiliary lid or cover 9c is structured so as to substantially airtight seal the gaps formed between the edge of the upper half-shell 9b delimiting each pass-through slot or recess 19a and the corresponding connecting pipe or pipes 19 sticking out from the same pass-through slot or recess 19, to prevent/ minimize the air leakages through these gaps.
  • the auxiliary lid or cover 9c preferably comprises an elongated element 21 which is structured for being fixed on the outer surface of the upper half-shell 9b, immediately upwards and crosswise of all pass-through slots or recessed 19a formed on the upper half-shell 9b, i.e.
  • each hook-shaped winglet 22 is suitably dimensioned to locally close/cover the gap between the connecting pipe 19 and the surrounding edge of the upper half-shell 9b.
  • the lower side edge of the elongated plate element 21 is preferably firmly insertable/fitable into a number of vertical pass-through slits or grooves formed on top end of a number of substantially vertically-oriented stiffening ribs 21a (two in the example shown) that protrude outwards from the upper half-shell 9b.
  • the top ends of these stiffening ribs 21a are located immediately over the pass-through slots or recessed 19a formed on the upper half-shell 9b.
  • the vertically-oriented stiffening ribs 21a are also structured to facilitate the centring of the elongated plate element 21 on the upper half-shell 9b and/or to prevent any longitudinal or transversal displacement of the elongated plate element 21 on the upper half-shell 9b.
  • Each hook-shaped winglet 22 instead is preferably provided with one or more snap-on locking splines 23 that protrudes from the distal end of the winglet main body remaining locally substantially perpendicular to the reference laying plane of the same winglet.
  • Each locking spline 23 is shaped to hook onto the side edge of the upper half-shell 9b delimiting the pass-through slot or recess 19a to be closed, so as to hold the hook-shaped winglet 22 locally adherent to the outer surface of the upper half-shell 9b.
  • Alike lower half-shell 9a and upper half-shell 9b, also the auxiliary lid or cover 9c is preferably, though not necessarily, made of plastic material preferably by means of an injection molding process.
  • the auxiliary lid or cover 9c also comprises a number of substantially hook-shaped clip elements 24 that protrude from a same face of the elongated plate element 21, preferably remaining locally substantially aligned to the mid line of the elongated plate element 21.
  • Each clip element 24 is structured to hold one or more electric cables or similar.
  • the centrifugal fan 13 instead preferably comprises an outer housing or impeller housing 25 which is located on the back of the lower supporting base or socle 9, at the end-opening of the central/intermediate segment 12c of the air recirculating conduit 12, so to directly communicate, i.e. be flowingly/fluidly connected to, both the central segment 12c of the air recirculating conduit 12 and the inside of revolving drum 3; and an impeller 26 which is housed in axially rotating manner inside the outer housing 25 to generate the airflow f when rotating about its reference axis A.
  • the electric motor 5 is preferably fixed/recessed on the lower supporting base or socle 9 so that its drive shaft 5a sticks out from the back of the lower supporting base or socle 9, at the end-opening of the central segment 12c of the air recirculating conduit 12; and the centrifugal fan 13 is mechanically connected to the electric motor 5.
  • the centrifugal fan 13 is preferably located on the back of the lower supporting base or socle 9, locally substantially aligned to the drive shaft 5a of electric motor 5, so that the outer housing 25 is locally substantially coaxial to the drive shaft 5a of electric motor 5, and the impeller 26 is rigidly fitted to the axial end of the drive shaft 5a of electric motor 5 so to be directly driven into rotation by the latter.
  • the outer housing or impeller housing 25 of centrifugal fan 13 is preferably also at least partly integrated on the back of the lower supporting base or socle 9 formed by the two half-shells 9a and 9b.
  • the impeller housing 25 of centrifugal fan 13 comprises a first portion 25a directly incorporated in the lower supporting base or socle 9, at the end-opening of the central segment 12c of the air recirculating conduit 12, and a second portion 25b which is structured/shaped for being coupled in a rigid and stable, though easily releasable, manner to the first portion 25a of the impeller housing so to close the first portion 25a of the impeller housing for covering up the impeller 26 that is at least partly recessed inside the first portion 25a of outer housing 24.
  • the first portion 25a of outer or impeller housing 25 is preferably made in one piece with the lower supporting base or socle 9, whereas the second portion 25b of the impeller housing consists in a substantially basin-shaped, rigid cover 25b which is fixed in a rigid and stable, though easily releasable, manner to the area of the lower supporting base or socle 9 forming the first portion 25a of outer or impeller housing 25, so as to substantially airtight close said first portion 25a and completely cover the impeller 26.
  • the first portion 25a of the impeller housing 25 of centrifugal fan 13 is preferably divided into two distinct and separated sections which are made in one piece, respectively, with the lower half-shell 9a and with the upper half-shell 9b, so that the whole first portion 25a of the impeller housing 25 is formed when the two half-shells 9a and 9b are coupled to one another.
  • the aforesaid two distinct and separated sections forming the first portion 25a of the impeller housing 25 are preferably structured and shaped so as to form, when firmly coupled to one another, a first approximately half-volute of the impeller housing 25; whereas the second portion 25b of impeller housing preferably consists in a substantially basin-shaped, rigid cover 25b which is shaped so as to form the remaining, complementary second half-volute of the impeller housing 25, and is structured for being substantially airtight coupled to the first half-volute 25a formed by the two half-shells 9a and 9b, to complete the outer housing 25 of centrifugal fan 13.
  • the impeller housing 25 of centrifugal fan 13 is spitted into three distinct and separated pieces which are structured for being coupled to one another to form the whole volute of the impeller housing 25.
  • the lower half-shell 9a and upper half-shell 9b are also preferably, though not necessarily, structured so that the central segment 12c of the air recirculating conduit 12 is substantially L-shaped, and is oriented so that a first portion of the central segment of the air recirculating conduit 12 extends below the revolving drum 3 while remaining locally substantially parallel to the longitudinal axis L of revolving drum 3, and that a second transversal portion of the central segment of the air recirculating conduit 12 extends below the revolving drum 3 remaining locally substantially perpendicular to the longitudinal axis L of drum 3.
  • the evaporator 15 and the condenser 16 are located, one downstream the other, inside the first portion of the central segment 12c of the air recirculating conduit 12; whereas the refrigerant compressing device 17 and the electric motor 5 are preferably fixed/recessed on the lower supporting base or socle 9, aligned one after the other in a direction locally substantially parallel to the longitudinal axis L of revolving drum 3, beside the first portion of the central segment 12c of the air recirculating conduit 12, so that the drive shaft 5a of electric motor 5 sticks out from the back of the lower supporting base or socle 9, at the end of the second portion of the central segment 12c of the air recirculating conduit 12.
  • electric motor 5 and refrigerant compressing device 17 are preferably fixed/recessed directly onto the lower half-shell 9a, beside the first portion of the central segment 12c of the air recirculating conduit 12.
  • pass-through slots or recesses 19a are made on the flank of the upper half-shell 9b that is directly faced to the refrigerant compressing device 17 and the electric motor 5.
  • the centrifugal fan 13 is therefore located on the back of the lower supporting base or socle 9, at the end of the transversal second portion of the central/intermediate segment 12c of the air recirculating conduit 12 that extend through the lower supporting base or socle 9, locally aligned to the drive shaft 5a of the electric motor 5.
  • auxiliary lid or cover 9c it allows to prevent/minimize the air leakages through the pass-through slots or recesses 19a made along the air recirculating conduit 12 in a simple ad cost-effective way, thus greatly simplify the assembly of the lower supporting base or socle 9 and the portion of the hot-air generator 6 located therein.
  • the auxiliary lid or cover 9c may be firmly fixed on the lower half-shell 9a and/or the upper half-shell 9b via rivets, screws and similar.
  • the lower supporting base or socle 9 of casing 2 may comprise two or more upper half-shells 9b which are structured for being stacked up on top of, and rigidly coupled to, the lower half-shell 9a, so as to form/compose different sections of the central/intermediate segment 12c of the air recirculating conduit 12.
  • the evaporator 15 and the condenser 16 of heat-pump assembly 14 may be recessed into sections of the central/intermediate segment 12c of the air recirculating conduit 12 delimited by different upper half-shells 9b.
  • auxiliary lid or cover 9c may be used to close/cover one or more pass-through openings 19a formed on the lower supporting base or socle 9 to allow the passage of one or more electric wires, probes, sensors and/or other elongated/oblong elements that have to reach the inside of the central/intermediate segment 12c of the air recirculating conduit 12.
  • the lower half-shell 9a and/or the upper half-shell 9b may have one or more pass-through openings 19a shaped/dimensioned to allow the passage of one or more electric wires, sensors, probes and/or other elongated/oblong elements that have to reach the inside of the central/intermediate segment 12c of the air recirculating conduit 12, and the auxiliary lid or cover 9c may be structured to prevent/minimize the air leakages through the gaps formed between the edges of half-shell 9a or 9b delimiting one or more pass-through openings 19a and the electric wires, sensors, probes and/or other elongated/oblong elements that stick out from these pass-through opening 19a.
  • the closed-circuit, hot-air generator 6 may consist of a forced-air, hot-air generator in which the cooling of the airflow f arriving from the revolving drum 3 is performed via a cold airflow arriving from the outside of casing 2.
  • the hot-air generator 6 lacks the heat-pump assembly 14 (i.e. it lacks the evaporator 15, the condenser 16, the refrigerant compressing device 17, the refrigerant expansion device 18, and the connecting pipes 19), and instead comprises an air/air heat exchanger which is located along the central/intermediate segment 12c of the air recirculating conduit 12, in place of the evaporator 15; and a resistor or similar air-heating device which is located along the air recirculating conduit 12, downstream of said air/air heat exchanger.
  • one or more pass-through openings 19a are realized on the lower supporting base or socle 9 to allow the entrance of the electric wires that, for example, power the resistor or transmit electronic signals from an internal sensor or probe to the electronic central control unit 7.
  • the auxiliary lid or cover 9c is fixed to the lower supporting base or socle 9 above said pass-through openings 19a to prevent/minimize the air leakages through the gaps formed between the edges of the lower supporting base or socle 9 delimiting said pass-through openings 19a and the electric wires that stick out from these pass-through opening 19a.
  • one or more sensors, probes and/or other elongated/oblong elements may extend in pass-through manner across the aforesaid pass-through openings 19a, and the auxiliary lid or cover 9c is fixed to the lower supporting base or socle 9 above these pass-through openings 19a to prevent/minimize the air leakages through the gaps formed between the edges of the lower supporting base or socle 9 delimiting said pass-through openings 19a and the sensors, probes and/or other elongated/oblong elements.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP11167977.5A 2011-05-27 2011-05-27 Wäschetrockner mit Drehtrommel Not-in-force EP2527526B1 (de)

Priority Applications (1)

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EP11167977.5A EP2527526B1 (de) 2011-05-27 2011-05-27 Wäschetrockner mit Drehtrommel

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EP2527526B1 EP2527526B1 (de) 2014-07-23

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2708638A1 (de) * 2012-09-13 2014-03-19 Electrolux Home Products Corporation N.V. Wäschetrockner mit Drehtrommel
EP2915916A1 (de) 2014-03-04 2015-09-09 Miele & Cie. KG Haushaltsgerät wie beispielsweise ein wäschetrockner, ein geschirrspüler oder ein waschtrockner mit einer wärmepumpeneinrichtung
DE102014216485A1 (de) * 2014-08-20 2016-02-25 BSH Hausgeräte GmbH Bodenmodul für ein Haushaltsgerät
EP2738302A3 (de) * 2012-11-30 2016-04-13 BSH Hausgeräte GmbH Wäschetrockner mit leckagebehaftetem umlaufendem Kreislauf für Prozessluft
CN106087364A (zh) * 2016-07-29 2016-11-09 无锡小天鹅股份有限公司 热泵式干衣机和用于热泵式干衣机的底座组件
WO2017178143A1 (de) * 2016-04-14 2017-10-19 BSH Hausgeräte GmbH Bodenmodul für ein haushaltsgerät zum trocknen von wäsche sowie haushaltsgerät
EP3252217A1 (de) * 2016-05-31 2017-12-06 Wuxi Little Swan Co., Ltd. Wärmepumpenmontagebox und wärmepumpentrockner- oder wärmepumpenwaschtrocknermaschine
WO2019129435A1 (en) * 2017-12-26 2019-07-04 Arcelik Anonim Sirketi A system enabling using different types of heat exchangers in products with heat pump
CN114318803A (zh) * 2020-09-30 2022-04-12 青岛海尔洗衣机有限公司 干衣机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1209277A2 (de) * 2000-11-20 2002-05-29 Electrolux Zanussi S.p.A. Wäschetrockner mit Wärmepumpe
DE202006018205U1 (de) * 2006-11-06 2007-02-15 V-Zug Ag Wäschetrockner mit Zusatzwärmetauscher
EP2312049A1 (de) * 2009-10-15 2011-04-20 Electrolux Home Products Corporation N.V. Wäschetrockner mit Wärmepumpensystem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1209277A2 (de) * 2000-11-20 2002-05-29 Electrolux Zanussi S.p.A. Wäschetrockner mit Wärmepumpe
DE202006018205U1 (de) * 2006-11-06 2007-02-15 V-Zug Ag Wäschetrockner mit Zusatzwärmetauscher
EP2034084A1 (de) 2006-11-06 2009-03-11 V-Zug AG Wäschetrockner mit Zusatzwärmetauscher
EP2312049A1 (de) * 2009-10-15 2011-04-20 Electrolux Home Products Corporation N.V. Wäschetrockner mit Wärmepumpensystem

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2708638A1 (de) * 2012-09-13 2014-03-19 Electrolux Home Products Corporation N.V. Wäschetrockner mit Drehtrommel
EP2738302A3 (de) * 2012-11-30 2016-04-13 BSH Hausgeräte GmbH Wäschetrockner mit leckagebehaftetem umlaufendem Kreislauf für Prozessluft
EP2915916A1 (de) 2014-03-04 2015-09-09 Miele & Cie. KG Haushaltsgerät wie beispielsweise ein wäschetrockner, ein geschirrspüler oder ein waschtrockner mit einer wärmepumpeneinrichtung
DE102014102811A1 (de) * 2014-03-04 2015-09-10 Miele & Cie. Kg Haushaltsgerät wie beispielsweise ein Wäschetrockner, ein Geschirrspüler oder ein Waschtrockner mit einer Wärmepumpeneinrichtung
DE102014216485A1 (de) * 2014-08-20 2016-02-25 BSH Hausgeräte GmbH Bodenmodul für ein Haushaltsgerät
WO2017178143A1 (de) * 2016-04-14 2017-10-19 BSH Hausgeräte GmbH Bodenmodul für ein haushaltsgerät zum trocknen von wäsche sowie haushaltsgerät
EP3252217A1 (de) * 2016-05-31 2017-12-06 Wuxi Little Swan Co., Ltd. Wärmepumpenmontagebox und wärmepumpentrockner- oder wärmepumpenwaschtrocknermaschine
CN106087364A (zh) * 2016-07-29 2016-11-09 无锡小天鹅股份有限公司 热泵式干衣机和用于热泵式干衣机的底座组件
WO2019129435A1 (en) * 2017-12-26 2019-07-04 Arcelik Anonim Sirketi A system enabling using different types of heat exchangers in products with heat pump
CN114318803A (zh) * 2020-09-30 2022-04-12 青岛海尔洗衣机有限公司 干衣机

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