EP2527524B1 - Wäschetrockner mit Drehtrommel - Google Patents

Wäschetrockner mit Drehtrommel Download PDF

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Publication number
EP2527524B1
EP2527524B1 EP11167968.4A EP11167968A EP2527524B1 EP 2527524 B1 EP2527524 B1 EP 2527524B1 EP 11167968 A EP11167968 A EP 11167968A EP 2527524 B1 EP2527524 B1 EP 2527524B1
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EP
European Patent Office
Prior art keywords
air
drum
structured
socle
refrigerant
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EP11167968.4A
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English (en)
French (fr)
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EP2527524A1 (de
Inventor
Marco Santarossa
Sergio Pillot
Diego Dal Ben
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Electrolux Home Products Corp NV
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Electrolux Home Products Corp NV
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Priority to EP11167968.4A priority Critical patent/EP2527524B1/de
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    • 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 

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 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 connected to the revolving drum, on opposite sides of the latter; an electric centrifugal 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.
  • EP1990465 discloses a rotary-drum home laundry dryer wherein the centrifugal fun is recessed into a lower supporting base or socle forming the floor-resting portion of the appliance casing.
  • This centrifugal fun is provided with a substantially funnel-shaped, intake manifold which is located on front the lower supporting base or socle and extends within the impeller housing of the centrifugal fun towards the impeller.
  • EP-2034084 discloses a heat-pump type, rotary-drum home laundry dryer wherein the electric centrifugal fan is located on the back of a lower supporting base or socle forming the floor-resting portion of the appliance casing. More specifically, a central section of the air recirculating conduit extends across the lower supporting base or socle, and the centrifugal fan is located on the back of the aforesaid lower supporting base or socle, at the end-opening of the central section of the air recirculating conduit, so as to protrude outside of said base or socle.
  • Aim of the present invention is to simplify the structure of today's laundry dryers, so to simplify the assembly and/or replacement of the centrifugal fan.
  • a rotary-drum laundry dryer comprising the features of claim 1.
  • the rotary-drum laundry dryer is characterized in that the impeller housing comprises a first portion directly associated to said lower supporting base or socle, and a second portion structured/shaped for being coupled in a rigid and stable, though easily releasable, manner to the first portion of the impeller housing to close said first portion and cover the impeller.
  • the rotary-drum laundry dryer is characterized in that the first portion of the impeller housing is realized in one piece with said lower supporting base or socle, and in that second portion of the impeller housing comprises a substantially basin-shaped cover which is fixed in a rigid and stable, though easily releasable, manner to the part of said lower supporting base or socle forming the first portion of the impeller housing, so as to close the first portion of the impeller housing and completely cover said impeller.
  • the rotary-drum laundry dryer is characterized in that the first portion of the impeller housing is partly realized in one piece with the lower half-shell and partly in one piece with the upper half-shell.
  • the rotary-drum laundry dryer is characterized in that said intake manifold consists in a substantially frustoconical sleeve.
  • the rotary-drum laundry dryer is characterized in that said frustoconical sleeve is provided, all-around the larger mouth, with an outwards projecting peripheral flange which is structured to fit into two corresponding coplanar grooves realized one in the lower half-shell, and the other in the upper half-shell.
  • Rotary-drum laundry dryer according to any one of the foregoing claims, characterized in that impeller of the air circulating means is rigidly fitted to the axial end of a drive shaft extending through said intake manifold.
  • the rotary-drum laundry dryer is characterized by also comprising an electric motor assembly which is mechanically connected to the revolving drum for rotating said drum about its longitudinal axis; said electric motor assembly being fixed on said lower supporting base or socle so that an axial end of the drive shaft of said electric motor assembly sticks out of the lower supporting base or socle, through said intake manifold, to support and drive into rotation said impeller.
  • the rotary-drum laundry dryer is characterized by also comprising an upper boxlike cabinet which is rigidly fixed to the top of the lower supporting base or socle and is structured so to house the revolving drum.
  • the rotary-drum laundry dryer is characterized in that the longitudinal axis of the revolving drum is substantially horizontally-oriented, and in that the revolving drum rests on a number of supporting rollers which are arranged substantially at the two axial ends of the revolving drum, and are fixed in free revolving manner directly to the top of said lower supporting base or socle.
  • the rotary-drum laundry dryer is characterized in that the supporting rollers are fixed in free revolving manner directly to the upper half-shell of the lower supporting base or socle.
  • the rotary-drum laundry dryer is characterized in that the hot-air generator is a heat-pump type, hot-air generator which comprises: a first air/refrigerant heat exchanger which is located inside said section of the air recirculating conduit, and is structured for rapidly cooling down the airflow arriving from the revolving drum to condense and restrain the surplus moisture in the airflow; a second air/refrigerant heat exchanger which is located inside said section of the air recirculating conduit, downstream of the first air/refrigerant heat exchanger, and which is structured for rapidly heating the airflow arriving from the first air/refrigerant heat exchanger and directed back to the revolving drum; a refrigerant compressing device which is interposed between the refrigerant-outlet of the first air/refrigerant heat exchanger and the refrigerant-inlet of the second air/refrigerant heat exchanger, and which is structured for compressing the gaseous-state refrigerant directed
  • the rotary-drum laundry dryer is characterized in that the lower half-shell and the upper half-shell are both realized in plastic material preferably via an injection molding process.
  • a rotary-drum laundry dryer comprising a revolving drum structured for housing the laundry to be dried, a hot-air generator structured to circulate a stream of hot air 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 in turn comprising: an air recirculating conduit having its two ends connected to the revolving drum; air circulating means which are located along the air recirculating conduit and are structured to produce, inside the air recirculating conduit, an airflow which flows through the revolving drum and over the laundry inside the drum; and at least one heat exchanger located along the air recirculating conduit and structured to cool the moist air arriving from the rotatable drum so to cause the condensation of the surplus moisture inside the airflow; a section 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 of the hot-air
  • the rotary-drum laundry dryer is characterized in that the air circulating means additionally comprises an impeller housing which communicates with the end-opening of said section of the air recirculating conduit, and an impeller which is housed in axially rotating manner inside the impeller housing to generate said airflow; the intake manifold extending within the impeller housing from the end-opening of said central of the air recirculating conduit, and towards the impeller.
  • the rotary-drum laundry dryer is characterized in that the impeller housing comprises a first portion directly associated to said lower supporting base or socle, and a second portion structured/shaped for being coupled in a rigid and stable, though easily releasable, manner to the first portion of the impeller housing to close said first portion and cover the impeller.
  • the rotary-drum laundry dryer is characterized in that the first portion of the impeller housing is realized in one piece with said lower supporting base or socle, and in that second portion of the impeller housing comprises a substantially basin-shaped cover which is fixed in a rigid and stable, though easily releasable, manner to the part of said lower supporting base or socle forming the first portion of the impeller housing, so as to close the first portion of the impeller housing and completely cover said impeller.
  • the rotary-drum laundry dryer is characterized in that the lower half-shell and upper half-shell are shaped so as to form, when coupled to one another, said first portion of the impeller housing.
  • the rotary-drum laundry dryer is characterized in that said air circulating means are located outside said lower supporting base or socle.
  • the rotary-drum laundry dryer is characterized in that said intake manifold consists in a substantially frustoconical sleeve.
  • the rotary-drum laundry dryer is characterized in that said frustoconical sleeve is provided, all-around the larger mouth, with an outwards projecting peripheral flange which is structured to fit into two corresponding coplanar grooves realized one in the lower half-shell, and the other in the upper half-shell.
  • the rotary-drum laundry dryer is characterized in that the impeller of the air circulating means is rigidly fitted to the axial end of a drive shaft extending through said intake manifold.
  • the rotary-drum laundry dryer is characterized by also comprising an electric motor assembly which is mechanically connected to the revolving drum for rotating said drum about its longitudinal axis; said electric motor assembly being fixed on said lower supporting base or socle so that an axial end of the drive shaft of said electric motor assembly sticks out of the lower supporting base or socle, through said intake manifold, to support and drive into rotation said impeller.
  • the rotary-drum laundry dryer is characterized by also comprising an upper boxlike cabinet which is rigidly fixed to the top of the lower supporting base or socle and is structured so to house the revolving drum.
  • the rotary-drum laundry dryer is characterized in that the longitudinal axis of the revolving drum is substantially horizontally-oriented, and in that the revolving drum rests on a number of supporting rollers which are arranged substantially at the two axial ends of the revolving drum, and are fixed in free revolving manner directly to the top of said lower supporting base or socle.
  • the rotary-drum laundry dryer is characterized in that the supporting rollers are fixed in free revolving manner directly to the upper half-shell of the lower supporting base or socle.
  • the rotary-drum laundry dryer is characterized in that the hot-air generator is a heat-pump type, hot-air generator which comprises: a first air/refrigerant heat exchanger which is located inside said section of the air recirculating conduit, and is structured for rapidly cooling down the airflow arriving from the revolving drum to condense and restrain the surplus moisture in the airflow; a second air/refrigerant heat exchanger which is located inside said section of the air recirculating conduit, downstream of the first air/refrigerant heat exchanger, and which is structured for rapidly heating the airflow arriving from the first air/refrigerant heat exchanger and directed back to the revolving drum; a refrigerant compressing device which is interposed between the refrigerant-outlet of the first air/refrigerant heat exchanger and the refrigerant-inlet of the second air/refrigerant heat exchanger, and which is structured for compressing the gaseous-state refrigerant directed
  • 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 outer boxlike casing 2 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.
  • front and rear idle supporting rollers 11 are preferably fixed in free revolving manner directly to the 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 comprises of 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 into
  • 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:
  • a central/intermediate section of the air recirculating conduit 12 extends in pass-through manner across the lower supporting base or socle 9, and the centrifugal fan 13 is located outside the lower supporting base or socle 9, at the end-opening of the central section of the air recirculating conduit 12, so to directly communicate with, i.e. be fluidly connected to, the end-opening of the aforesaid central section of the air recirculating conduit 12.
  • the central section of the air recirculating conduit 12 is preferably substantially horizontally-oriented inside the lower supporting base or socle 9.
  • the centrifugal fan 13 is instead preferably located on the back of the lower supporting base or socle 9, and comprises an outer housing 15 which is located outside of the lower supporting base or socle 9, at the end-opening of the aforesaid central section of the air recirculating conduit 12, so to directly communicate with, i.e. be fluidly connected to, said end-opening of the central section of the air recirculating conduit 12, and also with the inside of revolving drum 3; and an impeller 16 which is housed in axially rotating manner inside the outer housing 15 to generate the airflow f when rotating about its reference axis A.
  • the heat-pump assembly 14 in turn comprises:
  • the air/refrigerant heat exchanger 17 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 19 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 centrifugal fan 13 additionally comprises a substantially funnel-shaped, intake manifold 20 which is fixed in a rigid and stable, though easily removable, manner to the lower supporting base or socle 9, at the end-opening of the central section of the air recirculating conduit 12, and extends within the outer housing 15 towards the impeller 16 while remaining locally substantially coaxial to the impeller rotation axis A.
  • the intake manifold 20 extends within the outer housing 15 locally substantially coaxial to the impeller supporting shaft, and the impeller 16 is rigidly fitted at the axial end of the supporting shaft that extends through the intake manifold 20 and juts out of the intake manifold 20.
  • 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 section of the air recirculating conduit 12; and the centrifugal fan 13 is 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 intake manifold 20 extends within the outer housing 15 locally substantially coaxial to the drive shaft 5a of electric motor 5, and the impeller 19 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 15 in turn comprises a first portion 15a directly adjoining the lower supporting base or socle 9, at the end-opening of the central section of the air recirculating conduit 12, and a second portion 15b which is structured/shaped for being coupled in a rigid and stable, though easily releasable, manner to the first portion 15a of the outer housing 15 so to close the first portion 15a of outer housing 15 for covering up the impeller 16 at least partly recessed inside the first portion 15a of outer housing 15.
  • the first portion 15a of outer housing 15 is preferably realized in one piece with the lower supporting base or socle 9, whereas the second portion 15b of outer housing 15 consists in a substantially basin-shaped, rigid cover 15b 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 15a of outer housing 15, so as to substantially airtight close said first portion 15a and completely cover the impeller 16.
  • the lower supporting base or socle 9 of the outer casing 2 is formed/composed by a lower half-shell 9a which is structured for resting on the floor, and by an upper half-shell 9b which is structured for being stacked up on top of, and rigidly coupled to, the lower half-shell 9a, so to preferably directly support the parallelepiped-shaped upper boxlike cabinet 10 and preferably also the front and rear idle rollers 11 that support in free revolving manner the revolving drum 3.
  • These lower half-shell 9a and upper half-shell 9b are structured/shaped so as to form, when coupled to one another, the substantially horizontally-oriented, whole central section of the air recirculating conduit 12 that is shaped/dimensioned so as to house, one after the other along the flowing direction of the airflow f, both the evaporator 17 and the condenser 18 of the heat-pump assembly 14.
  • the lower half-shell 9a and upper half-shell 9b are shaped so as to form the two halves of the aforesaid central section 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 section of the air recirculating conduit 12.
  • the lower half-shell 9a and the upper half-shell 9b are both preferably, though not necessarily, realized in plastic material by means of an injection molding process.
  • the end-opening of the central section of the air recirculating conduit 12 is therefore delimited by both the lower half-shell 9a and the upper half-shell 9b, and the intake manifold 20 is directly jammed in between the aforesaid lower half-shell 9a and upper half-shell 9b, at the end-opening of the central section of the air recirculating conduit 12.
  • the intake manifold 20 consists in a substantially frustoconical sleeve 20 which preferably made of plastic material, and is provided with an outwards projecting peripheral flange 20a extending all-around the larger mouth.
  • This peripheral flange 20a is structured to fit into two corresponding coplanar semicircular grooves realized one in the lower half-shell 9a and the other in the upper half-shell 9b, so to trap and firmly fix the sleeve 20 between the lower half-shell 9a and the upper half-shell 9b when said half-shells 9a and 9b are coupled to one another to form the aforesaid central section of the air recirculating conduit 12.
  • the centrifugal fan 13 of hot-air generator 6 is preferably also partly recessed and integrated on the back of the lower supporting base or socle 9 formed by the two half-shells 9a and 9b.
  • first portion 15a of the outer housing 15 of centrifugal fan 13 is preferably divided into two distinct and separated sections which are realized in one piece, respectively, with the lower half-shell 9a and with the upper half-shell 9b, so that the whole first portion 15a of the outer housing 15 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 15a of outer housing 15 are preferably structured and shaped so as to form, when firmly coupled to one another, a first approximately half-volute of the outer housing 15; whereas the second portion 15b of outer housing 15 preferably consists in a substantially basin-shaped, rigid cover 15b which is shaped so as to form the remaining, complementary second half-volute of the outer housing 15, and is structured for being substantially airtight coupled to the first half-volute 15a formed by the two half-shells 9a and 9b, to complete the outer housing 15 of centrifugal fan 13.
  • the outer housing 15 of centrifugal fan 13 is split into three distinct and separated pieces which are structured for being substantially airtight coupled to one another to form the volute of the outer housing 15.
  • the lower half-shell 9a and upper half-shell 9b are also preferably, though not necessarily, structured so that the central section of the air recirculating conduit 12 is substantially L-shaped, and is oriented so that a first portion of the central section 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 section 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 17 and the condenser 18 of the heat-pump assembly 14 are preferably located, one downstream the other, inside the first portion of the aforesaid central section of the air recirculating conduit 12; whereas the refrigerant compressing device 19 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 section 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 section of the air recirculating conduit 12.
  • electric motor 5 and refrigerant compressing device 19 are preferably fixed/recessed directly onto the lower half-shell 9a, beside the first portion of the central section of the air recirculating conduit 12.
  • the centrifugal fan 13 is therefore located on the back of the lower supporting base or socle 9, at the end of the second portion of the central section of the air recirculating conduit 12, locally aligned to the drive shaft 5a of the electric motor 5.
  • the first portion 15a of outer housing 15 is realized on the back of the lower supporting base or socle 9, locally aligned to the drive shaft 5a of the electric motor 5, so that the center of the first half-volute 15a directly communicates with, i.e. is fluidly connected to, the end-opening of the second portion of the central section of the air recirculating conduit 12, and the substantially frustoconical sleeve 20 forming the intake manifold 20 protrudes from the center of the aforesaid first half-volute 15a towards the impeller 16 while remaining locally substantially coaxial to the drive shaft 5a of electric motor 5.
  • the centrifugal fan 13 can use impellers 16 of different diameter with no structural modifications to the outer housing 15, thus allowing, during assembly of the laundry dryer 1, a cheap and rapid adaptation of the impeller dimensions to the actual performance of the electric motor 5 fixed on the lower supporting base or socle 9 to minimize electricity consumption.
  • the operator can choose the most appropriate impeller 16 and quickly fit it onto the drive shaft 5a together with the corresponding funnel-shaped intake manifold 20.
  • the quick replacement of the intake manifold 20 allows to use intake manifolds 20 of different axial length to compensate limited axial displacements of the driving shaft 5a.
  • 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 evaporator 17, the condenser 18, the refrigerant compressing device 19 and the refrigerant expansion device, and instead comprises: an air/air heat exchanger which is located along the central section of the air recirculating conduit 12, in place of the evaporator 17; and a resistor or similar air-heating device which is located along the air recirculating conduit 12, downstream of said air/air heat exchanger.
  • the air/air heat exchanger is structured for being crossed, at the same time, by the airflow f arriving from revolving drum 3 and by a stream of cold air arriving from outside the casing 2, thus allowing the stream of external cold air to absorb heat from the airflow f for causing the condensation of the surplus moisture in the airflow f arriving from revolving drum 3; whereas the resistor is structured for rapidly heating up the dehumidified air directed back into the revolving drum 3.

Claims (12)

  1. Drehtrommelwäschetrockner (1), umfassend eine Drehtrommel (3), die zum Aufnehmen der zu trocknenden Wäsche strukturiert ist, einen Heißluftgenerator (6), der zum Zirkulieren eines Stroms von Heißluft durch die Drehtrommel (3) strukturiert ist, und ein unteres Trägerfundament oder unterer Trägersockel (9), das bzw. der zum Ruhen auf dem Boden und zum Aufnehmen von wenigstens einem Teil des Heißluftgenerators (6) strukturiert ist;
    wobei der Heißluftgenerator (6) wiederum Folgendes umfasst: eine Luftrezirkulationsleitung (12), deren zwei Enden mit der Drehtrommel (3) verbunden sind; Luftzirkulationsmittel (13), die entlang der Luftrezirkulationsleitung (12) angeordnet sind und dazu strukturiert sind, in der Luftrezirkulationsleitung (12) einen Luftstrom (f) zu erzeugen, der durch die Drehtrommel (3) und über die Wäsche in der Trommel (3) strömt; und wenigstens einen Wärmetauscher (17), der entlang der Luftrezirkulationsleitung (12) angeordnet ist und dazu strukturiert ist, feuchte Luft, die von der drehbaren Trommel (3) eintrifft, zu kühlen, um die Kondensation der überschüssigen Feuchtigkeit im Luftstrom (f) zu bewirken;
    einen Abschnitt der Luftrezirkulationsleitung (12), der sich über das untere Trägerfundament oder den unteren Trägersockel (9) erstreckt und dazu strukturiert ist, den wenigstens einen Wärmetauscher (17) des Heißluftgenerators (6) aufzunehmen;
    wobei das Luftzirkulationsmittel (13) ein Laufradgehäuse (15), das an einer Endöffnung des Abschnitts der Luftrezirkulationsleitung (12) angeordnet ist und mit dieser in Verbindung steht, und ein Laufrad (16) umfasst, dass axial drehend im Laufradgehäuse (15) aufgenommen ist, um den Luftstrom (f) zu erzeugen;
    wobei der Wäschetrockner (1) dadurch gekennzeichnet ist, dass das Luftzirkulationsmittel (13) außerdem einen im Wesentlichen trichterförmigen Ansaugkrümmer (20) umfasst, der in starrer und stabiler, jedoch leicht entfernbarer Weise an dem unteren Trägerlundament oder -sockel (9) an der Endöffnung des Abschnitts der Luftrezirkulationsleitung (12) befestigt ist und sich in dem Laufradgehäuse (15) zum Laufrad (16) hin erstreckt; und dadurch, dass das untere Trägerfundament oder der untere Trägersockel (9) eine untere Halbschale (9a), die zum Ruhen auf dem Boden strukturiert ist, und eine obere Halbschale (9b) umfasst, die auf die Oberseite der unteren Halbschale (9a) gestapelt und starr daran gekoppelt ist; wobei die untere Halbschale (9a) und die obere Halbschale (9b) derart geformt sind, dass sie aneinander gekoppelt den Abschnitt der Luftrezirkulationsleitung (12) und die Endöffnung des Abschnitts der Luftrezirkulationsleitung (12) bilden, wobei der Ansaugkrümmer (20) an der Endöffnung des Abschnitts der Luftrezirkulationsleitung (12) zwischen die untere und obere Halbschale (9a, 9b) geklemmt ist.
  2. Drehtrommelwäschetrockner nach Anspruch 1, dadurch gekennzeichnet, dass das Laufradgehäuse (15) einen ersten Abschnitt (15a) umfasst, der unmittelbar dem unteren Trägerfundament oder -sockel (9) zugeordnet ist, und einen zweiten Abschnitt (15b), der dazu strukturiert/geformt ist, in starrer und stabiler, aber leicht lösbarer Weise an den ersten Abschnitt (15a) des Laufradgehäuses (15) gekoppelt zu sein, um den ersten Abschnitt zu schließen und das Laufrad (16) abzudecken.
  3. Drelatrommelwäschetrockner nach Anspruch 2, dadurch gekennzeichnet, dass der erste Abschnitt (15a) des Laufradgehäuses (15) einstückig mit dem unteren Trägerfundament oder -sockel (9) ausgeführt ist, und dass der zweite Abschnitt (15b) des Laufradgehäuses (15) eine im Wesentlichen beckenförmige Abdeckung (15) umfasst, die in starrer und stabiler, aber leicht lösbarer Weise an dem Teil des unteren Trägerfundaments oder -sockels (9) befestigt ist, der den ersten Abschnitt (15a) des Laufradgehäuses (15) bildet, um den ersten Abschnitt (15a) des Laufradgehäuses (15) zu schließen und das Laufrad (9) vollständig abzudecken.
  4. Drehtrommelwäschetrockner nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der erste Abschnitt (15a) des Laufradgehäuses (15) teilweise einstückig mit der unteren Halbschale (9a) und teilweise einstückig mit der oberen Halbschale (9b) ausgeführt ist.
  5. Drehtrommelwäschetrockner nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Ansaugkrümmer (20) aus einer im Wesentlichen kegelstumpfförmige Hülse (20) besteht.
  6. Drehtrommelwäschetrockner nach Anspruch 5, dadurch gekennzeichnet, dass die kegelstumpfförmige Hülse (20) ganz um den größeren Mund herum vorgesehen ist, mit einem nach außen vorspringenden Umfangsflansch (20a), der dazu strukturiert, in zwei entsprechende koplanare Nuten zu passen, von denen eine in der unteren Halbschale (9a) und die andere in der oberen Halbschale (9b) ausgeführt ist.
  7. Drehtrommelwäschetrockner nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Laufrad (16) des Luftzirkulationsmittels (13) starr am axialen Ende einer Antriebswelle (5a) angebracht ist, die sich durch den Ansaugkrümmer (20) erstreckt.
  8. Drehtrommelwäschetrockner nach Anspruch 7, dadurch gekennzeichnet, dass er außerdem eine Elektromotorbaugruppe (5) umfasst, die mechanisch mit der Drehtrommel (3) verbunden ist, um die Trommel (3) um ihre Längsachse (L) zu drehen; wobei die Elektromotorbaugruppe (5) derart an dem unteren Trägerfundament oder -sockel (9) befestigt ist, dass ein axiales Ende der Antriebswelle (5a) der Elektromotorbaugruppe (5) aus dem unteren Trägerfundament oder -sockel (9) durch den Ansaugkrümmer (20) herausragt, um das Laufrad (16) zu tragen und drehend anzutreiben.
  9. Drehtrommelwäschetrockner nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass er außerdem ein oberes kastenartiges Gehäuse (10) umfasst, das starr an der Oberseite des unteren Trägerfundaments oder -sockels (9) befestigt ist und dazu strukturiert ist, die Drehtrommel (3) aufzunehmen.
  10. Drehtrommelwäschetrockner nach Anspruch 9, dadurch gekennzeichnet, dass die Längsachse (L) der Drehtrommel (3) im Wesentlichen horizontal ausgerichtet ist, und dadurch, dass die Drehtrommel (3) auf einer Anzahl von Trägerrollen (11) ruht, die im Wesentlichen an den zwei axialen Enden der Drehtrommel (3) angeordnet sind und in frei drehender Weise unmittelbar an der Oberseite des unteren Trägerfundaments oder -sockels (9) befestigt sind.
  11. Drehtrommelwäschetrockner nach Anspruch 10, dadurch gekennzeichnet, dass die Trägerrollen (11) in frei drehender Weise unmittelbar an der oberen Halbschale (9b) des unteren Trägerfundaments oder -sockels (9) befestigt sind.
  12. Drehtrommelwäschetrockner nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Heißluftgenerator (6) ein Heißluftgenerator (6) des Wärmepumpentyps ist, der Folgendes umfasst:
    - einen ersten Luft/Kältemittel-Wärmetauscher (17), der im Inneren des Abschnitts der Luftrezirkulationsleitung (12) angeordnet ist und dazu strukturiert ist, den Luftstrom (f), der von der Drehtrommel (3) eintrifft, schnell abzukühlen, um überschüssige Feuchtigkeit im Luftstrom (f) kondensieren zu lassen und zurückzuhalten;
    - einen zweiten Luft/Kältemittel-Wärmetauscher (18), der im Inneren des Abschnitts der Luftrezirkulationsleitung (12) stromabwärts von dem ersten Luft/Kältemittel-Wärmetauscher (17) angeordnet ist und dazu strukturiert ist, den Luftstrom (f), der von dem ersten Luft/Kältemittel-Wärmetauscher (17) eintrifft, schnell zu erwärmen und zur Drehtrommel (3) zurück zu lenken;
    - eine Kältemittelverdichtungsvorrichtung (19), die zwischen dem Kältemittelauslass des ersten Luft/Kältemittel-Wärmetauschers (17) und dem Kältemitteleinlass des zweiten Luft/Kältemittel-Wärmetauschers (18) angeordnet ist und dazu strukturiert ist, das Kältemittel im gasförmigen Zustand, das zum zweiten Luft/Kältemittel-Wärmetauscher (18) gelenkt wird, zu verdichten; und
    - eine Kältemittelexpansionsvorrichtung, die zwischen dem Kältemittelauslass des zweiten Luft/Kältemittel-Wärmetauschers (18) und dem Kältemitteleinlass des ersten Luft/Kältemittel-Wärmetauschers (17) angeordnet ist und dazu strukturiert ist, eine schnelle Expansion des zum ersten Luft/Kältemittel-Wärmetauscher (17) gelenkten Kältemittels zu bewirken.
EP11167968.4A 2011-05-27 2011-05-27 Wäschetrockner mit Drehtrommel Active EP2527524B1 (de)

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DE202006018205U1 (de) 2006-11-06 2007-02-15 V-Zug Ag Wäschetrockner mit Zusatzwärmetauscher
DE102007021815B4 (de) * 2007-05-07 2011-12-15 Miele & Cie. Kg Wäschetrockner mit einem Luftkanal
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