EP2060671B1 - Séchoir à linge pour usage domestique - Google Patents

Séchoir à linge pour usage domestique Download PDF

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Publication number
EP2060671B1
EP2060671B1 EP07121051A EP07121051A EP2060671B1 EP 2060671 B1 EP2060671 B1 EP 2060671B1 EP 07121051 A EP07121051 A EP 07121051A EP 07121051 A EP07121051 A EP 07121051A EP 2060671 B1 EP2060671 B1 EP 2060671B1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
air
airflow
heat
laundry
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07121051A
Other languages
German (de)
English (en)
Other versions
EP2060671A1 (fr
Inventor
Alberto Bison
Ezio Fornasieri
Silvia Minetto
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 EP07121051A priority Critical patent/EP2060671B1/fr
Priority to AT07121051T priority patent/ATE472629T1/de
Priority to PL07121051T priority patent/PL2060671T3/pl
Priority to DE602007007489T priority patent/DE602007007489D1/de
Priority to RU2010124943/12A priority patent/RU2467110C2/ru
Priority to PCT/EP2008/009699 priority patent/WO2009065538A1/fr
Publication of EP2060671A1 publication Critical patent/EP2060671A1/fr
Application granted granted Critical
Publication of EP2060671B1 publication Critical patent/EP2060671B1/fr
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 
    • D06F58/206—Heat pump arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide

Definitions

  • the present invention relates to a home laundry drier.
  • the present invention relates to a rotary-drum home laundry drier, to which the following description refers purely by way of example.
  • rotary-drum laundry driers comprise a substantially parallelepiped-shaped outer box casing; a cylindrical laundry drying drum housed in axially rotating manner inside the box casing, directly facing a laundry loading and unloading opening formed in the front face of the casing; a door hinged to the front face of the casing to rotate to and from a rest position closing the opening in the front face of the casing to seal the drying drum; and an electric motor for rotating the drying drum about its longitudinal axis inside the casing.
  • Rotary-drum laundry driers of the above type also comprise a closed-circuit, hot-air generator designed to circulate inside the drying drum a stream of hot air with a low moisture content, and which flows through the drying drum and over the laundry inside the drum to rapidly dry the laundry.
  • the closed-circuit', hot-air generator comprises an air recirculating conduit having its two ends connected to the drying drum, on opposite sides of the latter; an electric centrifugal fan or similar located along recirculating conduit to produce, inside the recirculating conduit, an airflow which flows through the drying drum; and finally a heat-pump assembly having its two heat exchangers located one after the other, along the air recirculating conduit.
  • the first air/refrigerant heat exchanger of the heat-pump assembly provides for rapidly cooling the airflow arriving from the drying drum to condense the surplus moisture in the airflow; whereas the second air/refrigerant heat exchanger of the heat-pump assembly provides for rapidly heating the airflow arriving from the first heat exchanger and directed back to the drying drum, so that the airflow re-entering into the drying drum is heated rapidly to a temperature higher than or equal to that of the air flowing out of the drying drum.
  • the heat-pump assembly of the hot-air generator generally comprises:
  • evaporator and condenser of the heat-pump assembly are located along the air recirculating conduit, so as that the evaporator provides for rapidly cooling the airflow arriving from the drying drum to condense the surplus moisture in the airflow, and the condenser provides for rapidly heating the airflow arriving from the evaporator and directed back to the drying drum, so that the airflow entering into the drying drum is heated rapidly to a temperature higher than or equal to that of the same air flowing out of the drying drum.
  • US patent application US2005086827 envisages the use of the carbon dioxide as refrigerant in the heat-pump assembly, and also to keep the carbon dioxide in the gaseous state on the high pressure side of the heat-pump assembly.
  • the carbon dioxide has a supercritical pressure along the first heat exchanger of the heat-pump assembly, and turns into a two-phase state in the throttling valve located downstream of the first heat exchanger of the heat-pump assembly.
  • the first heat exchanger therefore, works as a normal gas cooler.
  • a home laundry drier as claimed in Claim 1 and preferably, though not necessarily, in any one of the Claims depending directly or indirectly on Claim 1.
  • number 1 indicates as a whole a home laundry drier comprising a preferably, though not necessarily, parallelepiped-shaped outer box casing 2; a preferably, though not necessarily, cylindrical bell-shaped laundry drying drum 3 for housing the laundry to be dried, and which is fixed in axially rotating manner inside casing 2, directly facing a laundry loading and unloading opening 2a formed in the front face of casing 2; and a door 4 hinged to the front face of casing 2 to rotate to and from a rest position closing opening 2a in the front face to seal laundry drum 3.
  • drying drum 3 rests horizontally inside casing 2 on a number of horizontal supporting rollers 5 which are fitted to casing 2 to let drying drum 3 freely rotate about its longitudinal axis L.
  • laundry drier 1 also comprises a motor assembly 6 for rotating, on command, drying drum 3 about its longitudinal axis L inside casing 2; and a closed-circuit, hot-air generator 7 housed inside casing 2 and designed to circulate through drying drum 3 a stream of hot air having a low moisture level, and which flows over and rapidly dries the laundry inside drum 3.
  • closed-circuit, hot-air generator 7 provides for gradually drawing air from drying drum 3; extracting surplus moisture from the hot air drawn from drying drum 3; heating the dehumidified air to a predetermined temperature, normally higher than the temperature of the air from drying drum 3; and feeding the heated, dehumidified air back into drying drum 3, where it flows over, to rapidly dry, the laundry inside the drum.
  • hot-air generator 7 provides for continually dehumidifying and heating the air circulating inside drying drum 3 to rapidly dry the laundry inside the drum, and substantially comprises:
  • the intake end of recirculating conduit 8 is integrated in door 4, and is faced to the front opening of drying drum 3; the end wall 3a of drying drum 3 is perforated, or at any rate permeable to air, to permit air entry into drum 3; and the exhaust end of recirculating conduit 8 is coupled in airtight manner directly to the end wall 3a of drying drum 3.
  • electric centrifugal fan 9 it is structured to produce an airflow f flowing, along recirculating conduit 8, from the intake end of recirculating conduit 8, i.e. door 4, to the exhaust end of recirculating conduit 8, i.e. perforated end wall 3a of drying drum 3.
  • heat-pump assembly 10 operates in the same way as a traditional heat-pump - which is capable of transferring heat from one fluid to another using an intermediate gaseous refrigerant subjected to a closed thermodynamic cycle, the thermodynamic principles of which are widely known and therefore not described in detail - and comprises:
  • heat-pump assembly of traditional closed-circuit heat-pump-type hot-air generators, refrigerant compressing device 11, first air/refrigerant heat exchanger 12, second air/refrigerant heat exchanger 13 and refrigerant expansion device 14 are connected one to the other via suitable connecting pipes, so as to form a closed circuit allowing the refrigerant coming out from the outlet of compressing device 11 to flow, in sequence, through air/refrigerant heat exchanger 13, refrigerant expansion device 14 and air/refrigerant heat exchanger 13, before returning to the inlet of compressing device 11.
  • heat-pump assembly 10 of drier 1 uses carbon dioxide as refrigerant but, differently from any other home laundry drier, heat-pump assembly 10 is designed to maintain the whole refrigerant, i.e. the carbon dioxide, in a gaseous state in all the thermodynamic transformations making up the closed thermodynamic cycle performed by the heat-pump assembly 10.
  • refrigerant compressing device 11, first air/refrigerant heat exchanger 12, second air/refrigerant heat exchanger 13 and refrigerant expansion device 14 are structured to prevent the carbon dioxide from undergoing a phase transformation (from a single-phase state to a two-phase state) along the whole closed circuit formed by refrigerant compressing device 11, first air/refrigerant heat exchanger 12, second air/refrigerant heat exchanger 13 and refrigerant expansion device 14.
  • refrigerant compressing device 11 first air/refrigerant heat exchanger 12, second air/refrigerant heat exchanger 13 and refrigerant expansion device 14 are designed so as that all thermodynamic transformations making up the closed thermodynamic cycle performed by heat-pump assembly 10 - i.e. the refrigerant compression a-b, the refrigerant cooling b-c, the refrigerant rapid expansion c-d and the refrigerant heating d-a - remain above the saturation curve s of the carbon dioxide temperature-entropy chart.
  • the closed thermodynamic cycle performed by heat-pump assembly 10 is a totally supercritical closed thermodynamic cycle, and the carbon dioxide has a supercritical pressure both in the highpressure side (i.e. air/refrigerant heat exchanger 13) and in the low-pressure side (i.e. air/refrigerant heat exchanger 12) of the heat-pump assembly 10.
  • home laundry drier 1 finally comprises an electronic central control unit 15 which controls electric motor assembly 6, centrifugal fan 9, and heat-pump assembly 10 - or, rather, compressing device 11 - in predetermined manner, as memorized inside it, to perform the user-selected drying cycle.
  • heat-pump assembly 10 operates with a higher value of the refrigerant pressure along the low pressure side of the heat-pump assembly 10, thus drastically reducing energy consumption of refrigerant compressing device 11.
  • home laundry drier 1 may be integrated in a laundry washing machine, thus obtaining a laundry washing/drying machine.
  • drying drum 3 is housed in axially rotating manner into an airtight, preferably, though not necessarily, cylindrical laundry drying tub or chamber, which is fixed substantially horizontally inside casing 2, directly facing the laundry loading and unloading opening 2a formed in the front face of casing 2; and door 4 is hinged to the front face of casing 2 for rotating to and from a rest position closing opening 2a in the front face to seal the laundry drying tub.
  • airtight preferably, though not necessarily, cylindrical laundry drying tub or chamber, which is fixed substantially horizontally inside casing 2, directly facing the laundry loading and unloading opening 2a formed in the front face of casing 2; and door 4 is hinged to the front face of casing 2 for rotating to and from a rest position closing opening 2a in the front face to seal the laundry drying tub.

Claims (6)

  1. Sèche-linge domestique (1) comprenant un boîtier extérieur (2) et, à l'intérieur du boîtier, un contenant de séchage de linge (3) pour contenir le linge à sécher, et un générateur d'air chaud (7) pour faire circuler un flux d'air chaud à l'intérieur dudit contenant de séchage de linge (3); ledit générateur d'air chaud (7) comprenant une conduite de recirculation d'air (8) reliée aux deux extrémités audit contenant de séchage de linge (3), et un ensemble formant pompe à chaleur (10) dans lequel du dioxyde de carbone est utilisé comme réfrigérant, qui est apte à refroidir rapidement le flux d'air (f) sortant du contenant de séchage de linge (3) pour condenser l'humidité excédentaire dans ledit flux d'air (f) et ensuite pour chauffer rapidement le flux d'air (f) retournant dans ledit contenant de séchage de linge (3);
    ledit sèche-linge domestique (1) étant caractérisé en ce que ledit ensemble de pompe à chaleur (10) est conçu pour maintenir l'ensemble du réfrigérant dans un état gazeux dans toutes les transformations thermodynamiques constituant le cycle thermodynamique fermé exécuté par l'ensemble de pompe à chaleur (10).
  2. Sèche-linge domestique selon la revendication 1, caractérisé en ce que ledit ensemble de pompe à chaleur (10) comprend un moyen de compression de réfrigérant (11) pour compresser un réfrigérant de telle sorte que la pression et la température du réfrigérant à la sortie du moyen de compression (11) sont plus élevées que la pression et la température du réfrigérant à l'entrée dudit moyen de compression (11); un premier échangeur de chaleur air/réfrigérant (12) qui se situe le long de la conduite de recirculation (8) et qui est conçu de façon que le refrigérant s'écoulant à l'entrée du moyen de compression de réfrigérant (11) et le flux d'air (f) du contenant de séchage de linge (3) s'écoulent à travers celui-ci simultanément en permettant au réfrigérant d'absorber la chaleur du flux d'air (f); un deuxième échangeur de chaleur air/réfrigérant (13) qui se situe le long de la conduite de recirculation (8), en aval dudit premier échangeur de chaleur air/réfrigérant (12) et est conçu de façon que le réfrigérant de la sortie du moyen de compression de réfrigérant (11) et le flux d'air (f) dirigé vers le contenant de séchage de linge (3) s'écoulent à travers celui-ci simultanément en permettant au réfrigérant de libérer la chaleur dans le flux d'air (f); et un dispositif d'expansion de réfrigérant (14) qui soumet le réfrigérant s'écoulant du deuxième échangeur de chaleur air/réfrigérant (13) au premier échangeur de chaleur air/réfrigérant (12) à une expansion rapide de sorte que la pression et la température du réfrigérant entrant dans le premier échangeur de chaleur air/réfrigérant (12) sont bien plus basses que la pression et la température du réfrigérant sortant du deuxième échangeur de chaleur air/réfrigérant (13).
  3. Sèche-linge domestique selon la revendication 1 ou 2, caractérisé en ce que ledit générateur d'air chaud (7) comprend également des moyens de ventilation (9) aptes à produire, le long de ladite conduite de recirculation (8), un flux d'air (f) qui s'écoule à travers le contenant de séchage de linge (3).
  4. Sèche-linge domestique selon la revendication 3, caractérisé en ce que ledit premier échangeur de chaleur air/réfrigérant (12) se situe le long de la conduite de recirculation (8), en aval dudit moyen de ventilation (9).
  5. Sèche-linge domestique selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit contenant de séchage de linge (3) est un tambour en forme de cloche sensiblement cylindrique (3) fixé d'une manière axialement tournante à l'intérieur du boîtier extérieur (2) du séche-linge.
  6. Sèche-linge domestique selon la revendication 5, caractérisé en ce qu'il comprend également des moyens d'entraînement (6) pour faire tourner, sur commande, ledit tambour en forme de cloche (3) autour de son axe longitudinal (L).
EP07121051A 2007-11-19 2007-11-19 Séchoir à linge pour usage domestique Not-in-force EP2060671B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP07121051A EP2060671B1 (fr) 2007-11-19 2007-11-19 Séchoir à linge pour usage domestique
AT07121051T ATE472629T1 (de) 2007-11-19 2007-11-19 Haushaltswäschetrockner
PL07121051T PL2060671T3 (pl) 2007-11-19 2007-11-19 Domowa suszarka do prania
DE602007007489T DE602007007489D1 (de) 2007-11-19 2007-11-19 Haushaltswäschetrockner
RU2010124943/12A RU2467110C2 (ru) 2007-11-19 2008-11-17 Бытовая сушилка для белья
PCT/EP2008/009699 WO2009065538A1 (fr) 2007-11-19 2008-11-17 Sèche-linge domestique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07121051A EP2060671B1 (fr) 2007-11-19 2007-11-19 Séchoir à linge pour usage domestique

Publications (2)

Publication Number Publication Date
EP2060671A1 EP2060671A1 (fr) 2009-05-20
EP2060671B1 true EP2060671B1 (fr) 2010-06-30

Family

ID=39266568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07121051A Not-in-force EP2060671B1 (fr) 2007-11-19 2007-11-19 Séchoir à linge pour usage domestique

Country Status (6)

Country Link
EP (1) EP2060671B1 (fr)
AT (1) ATE472629T1 (fr)
DE (1) DE602007007489D1 (fr)
PL (1) PL2060671T3 (fr)
RU (1) RU2467110C2 (fr)
WO (1) WO2009065538A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2527518A1 (fr) 2011-05-26 2012-11-28 Electrolux Home Products Corporation N.V. Appareil de traitement d'articles doté d'un système de pompe à chaleur avec élément de sécurité
EP2527520A1 (fr) 2011-05-26 2012-11-28 Electrolux Home Products Corporation N.V. Appareil de traitement d'articles doté d'un système de pompe à chaleur avec élément de sécurité
EP2527519A1 (fr) 2011-05-26 2012-11-28 Electrolux Home Products Corporation N.V. Appareil de traitement d'articles doté d'un système de pompe à chaleur avec élément de sécurité

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2147999A1 (fr) * 2008-07-24 2010-01-27 Electrolux Home Products Corporation N.V. Séchoir à linge pour usage domestique
EP2479337B1 (fr) * 2011-01-24 2013-08-07 Electrolux Home Products Corporation N.V. Appareil domestique pour sécher les objets
EP2527522B1 (fr) * 2011-05-26 2013-12-25 Electrolux Home Products Corporation N.V. Sèche-linge à pompe à chaleur
EP2527521A1 (fr) * 2011-05-26 2012-11-28 Electrolux Home Products Corporation N.V. Sèche-linge à pompe à chaleur
EP2551402A1 (fr) * 2011-07-28 2013-01-30 Electrolux Home Products Corporation N.V. Système de pompe à chaleur pour sèche-linge
EP2551401A1 (fr) * 2011-07-28 2013-01-30 Electrolux Home Products Corporation N.V. Système de pompe à chaleur pour sèche-linge
EP2592184A1 (fr) * 2011-11-08 2013-05-15 Electrolux Home Products Corporation N.V. Sèche-linge à tambour rotatif

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100343593C (zh) * 2003-04-02 2007-10-17 松下电器产业株式会社 干燥装置及其运转方法
JP3825772B2 (ja) * 2003-09-05 2006-09-27 三洋電機株式会社 乾燥機
WO2005075728A1 (fr) * 2004-02-04 2005-08-18 Matsushita Electric Industrial Co., Ltd. Appareil de séchage et méthode de fonctionnement de celui-ci
CN1670295A (zh) * 2004-03-15 2005-09-21 三洋电机株式会社 干洗机和干燥机
JP4266903B2 (ja) * 2004-09-07 2009-05-27 三洋電機株式会社 洗濯乾燥機

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2527518A1 (fr) 2011-05-26 2012-11-28 Electrolux Home Products Corporation N.V. Appareil de traitement d'articles doté d'un système de pompe à chaleur avec élément de sécurité
EP2527520A1 (fr) 2011-05-26 2012-11-28 Electrolux Home Products Corporation N.V. Appareil de traitement d'articles doté d'un système de pompe à chaleur avec élément de sécurité
EP2527519A1 (fr) 2011-05-26 2012-11-28 Electrolux Home Products Corporation N.V. Appareil de traitement d'articles doté d'un système de pompe à chaleur avec élément de sécurité

Also Published As

Publication number Publication date
RU2467110C2 (ru) 2012-11-20
ATE472629T1 (de) 2010-07-15
RU2010124943A (ru) 2011-12-27
WO2009065538A1 (fr) 2009-05-28
DE602007007489D1 (de) 2010-08-12
EP2060671A1 (fr) 2009-05-20
PL2060671T3 (pl) 2010-12-31

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