EP2123823A1 - Séchoir à linge pour usage domestique - Google Patents

Séchoir à linge pour usage domestique Download PDF

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Publication number
EP2123823A1
EP2123823A1 EP08156769A EP08156769A EP2123823A1 EP 2123823 A1 EP2123823 A1 EP 2123823A1 EP 08156769 A EP08156769 A EP 08156769A EP 08156769 A EP08156769 A EP 08156769A EP 2123823 A1 EP2123823 A1 EP 2123823A1
Authority
EP
European Patent Office
Prior art keywords
air
airflow
laundry
drying container
casing
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
EP08156769A
Other languages
German (de)
English (en)
Other versions
EP2123823B1 (fr
Inventor
Luciano Sartor
Sergio Pillot
Marco Costantin
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 AT08156769T priority Critical patent/ATE517207T1/de
Priority to EP08156769A priority patent/EP2123823B1/fr
Priority to PL08156769T priority patent/PL2123823T3/pl
Priority to ES08156769T priority patent/ES2370918T3/es
Publication of EP2123823A1 publication Critical patent/EP2123823A1/fr
Application granted granted Critical
Publication of EP2123823B1 publication Critical patent/EP2123823B1/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 
    • D06F58/24—Condensing 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
    • D06F58/20—General details of domestic laundry dryers 

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 usually comprise a substantially parallelepiped-shaped outer casing; a cylindrical bell-shaped drum for housing the laundry to be dried, and which is housed in axially rotating manner inside the casing to rotate about a horizontal longitudinal axis, 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 casing and the revolving drum; and an electric motor assembly for rotating the 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 revolving drum a stream of hot air with a low moisture content, and which flows through the revolving 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 revolving drum, on opposite sides of the latter; an electric circulating fan or similar located along the recirculating conduit for producing, inside the recirculating conduit, an airflow which flows through the revolving drum; an air/air heat exchanger located along the recirculating conduit and designed for rapidly cooling the airflow from the revolving drum to condense the surplus moisture in the airflow; and finally an electric heater located along the recirculating conduit, downstream of the air/air heat exchanger, for rapidly heating the airflow from the heat exchanger back to the revolving drum, so that the air flowing directed into the drum is heated rapidly to a temperature higher than or equal to that of the same air flowing out of the revolving drum.
  • hot-air generator of the above type finally comprises an electric cooling fan which is located into the dryer casing, next to the air/air heat exchanger, for generating, on command, an airflow of external cold air which flows through the air/air heat exchanger to maximize efficiency of the air/air heat exchanger.
  • a home laundry dryer 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 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 revolving drum 3.
  • revolving drum 3 rests horizontally inside casing 2 on a number of horizontal supporting rollers 5 which are fitted to casing 2 to let revolving drum 3 freely rotate about its longitudinal axis L.
  • Laundry drier 1 also comprises an electric motor assembly 6 for rotating, on command, revolving 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 revolving drum 3 a stream of hot air having a low moisture level, and which flows over and rapidly dries the laundry inside drum 3.
  • Casing 2 revolving drum 3, door 4, supporting rollers 5, and electric motor assembly 6 are commonly known parts in the industry, and therefore not described in detail.
  • hot-air generator 7 provides for gradually drawing air from revolving drum 3; extracting surplus moisture from the hot air drawn from revolving drum 3; heating the dehumidified air to a predetermined temperature, normally higher than the temperature of the air from revolving drum 3; and feeding the heated, dehumidified air back into revolving 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 revolving 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 revolving drum 3; the end wall 3a of revolving 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 revolving drum 3.
  • Electric centrifugal fan 9 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. the perforated end wall 3a of revolving drum 3.
  • heat exchanger 10 is preferably, though not necessarily, located at the bottom of casing 2, and it is also provided with a condensed-water canister 10a which collects the liquid distilled water produced, when the drier is running, inside heat exchanger 10 by condensation of the surplus moisture in airflow f arriving from revolving drum 3. Obviously condensed-water canister 10a is located in the bottom of heat exchanger 10.
  • hot-air generator 7 is also provided with a second air/air heat exchanger 13 which is located along recirculating conduit 8, between the intake end of recirculating conduit 8 (i.e. door 4) and heat exchanger 10, preferably, though not necessarily, downstream of electric centrifugal fan 9, and which is designed so that the airflow f from revolving drum 3 and a natural chimneypot-effect generated ascensional convective current g of cold air from outside casing 2 flow through it simultaneously, so that the cold air ascensional convective current g cools the airflow f from revolving drum 3 to condense the surplus moisture inside airflow f.
  • a second air/air heat exchanger 13 which is located along recirculating conduit 8, between the intake end of recirculating conduit 8 (i.e. door 4) and heat exchanger 10, preferably, though not necessarily, downstream of electric centrifugal fan 9, and which is designed so that the airflow f from revolving drum 3 and a natural chimneypot-effect generated ascens
  • heat exchanger 13 comprises at least two vertically-oriented air ducts 14 and 15 which are housed inside casing 2 one close to the other, so as to share at least part of a partitioning wall made of heat-conductive material.
  • Vertically-oriented air duct 14 is inserted along recirculating conduit 8 so that the hot airflow f from revolving drum 3 can release heat to the partitioning wall that separates air ducts 14 and 15 one from the other; whereas vertically-oriented air duct 15 has its upper and lower ends in direct communication with the outside so as to allow the cold air from outside casing 2 to establish, through duct 15, a natural ascensional convective current g that cools the partitioning wall separating air ducts 14 and 15.
  • the hot airflow f from revolving drum 3 keeps the partitioning wall separating air ducts 14 and 15 at a temperature greater than that of the cold air from outside casing 2, so that the cold air from outside casing 2, after entering into air duct 15 from the lower end of duct 15, starts heating up while flowing on the partitioning wall.
  • the cold air from outside casing 2 starts expanding inside air duct 15 and is then driven upwards along air duct 15 by chimneypot-effect.
  • the vertically-oriented air duct 15 is integrated in one of the vertical walls of casing 2, whereas air duct 14 consists of a substantially flat boxlike element 14 which lies on this vertical wall of casing 2 for maximizing heat exchange.
  • one of the vertical walls of casing 2 consists of a substantially flat, rectangular-shaped panel 16 made of a heat-conductive material (such as a metal material), and which is provided with an internal airspace extending vertically within the panel body.
  • Said airspace defines duct 15 and communicates directly with the outside of casing 2 via two openings 15a e 15b located one next to the upper edge of panel 16 (i.e. next to the worktop of drier casing 2), and the other next to the lower edge of panel 16 (i.e. next to the bottom of drier casing 2).
  • Air duct 14 in turn, consists of an elongated rectangular cross-section tubular element made of a heat-conductive material, which is fixed on the inner face of panel 16, in a substantially vertical position, with one of its main lateral walls in direct contact with the inner face of panel 16, just upon airspace 15; and of two substantially funnel-shaped manifolds fitted on both ends of the tubular element for connecting, in airtight manner, said tubular element to two consecutive sections of recirculating conduit 8.
  • the manifold closing the lower end of the vertically-oriented tubular element lying on the inner face of panel 16 is also shaped so as to collect and drain to condensed-water canister 10a the liquid distilled water produced, when the drier is running, inside the vertically-oriented tubular element (i.e. inside air duct 14) by condensation of the surplus moisture in airflow f arriving from revolving drum 3.
  • the vertically-oriented tubular element forming air duct 14 may be in one peace with panel 16, and/or only the portion of panel 16 separating air duct 14 from air duct 15 may be made of a heat-conductive material.
  • heat exchanger 13 has lots of advantages: first and foremost, it allows a remarkable downsizing of the main air/air heat exchanger 10 and of electric cooling fan 11.
  • hot-air generator 7 lacks heat exchanger 10 and electric cooling fan 11, and may preferably, though not necessarily, comprise an auxiliary electric circulating fan or other type of air circulating pump, which is housed into air duct 15 for generating, on command and when the natural ascensional convective current g along air duct 15 does not suffices in sufficiently cooling the airflow f from revolving drum 3, an additional force-circulated airflow along air duct 15 for better cooling the partitioning wall separating air ducts 14 and 15, and so the airflow f arriving from revolving drum 3.
  • auxiliary electric circulating fan or other type of air circulating pump which is housed into air duct 15 for generating, on command and when the natural ascensional convective current g along air duct 15 does not suffices in sufficiently cooling the airflow f from revolving drum 3, an additional force-circulated airflow along air duct 15 for better cooling the partitioning wall separating air ducts 14 and 15, and so the airflow f arriving from re
  • heat exchanger 13 has its own condensed-water canister for collecting the liquid distilled water produced, when the drier is running, inside air duct 14 by condensation of the surplus moisture in airflow f arriving from revolving drum 3.
  • the condensed-water canister is located on the bottom of casing 2, just beneath the manifold closing the lower end of the vertically-oriented tubular element forming the main section of air duct 14.
  • the closed-circuit, hot-air generator 7 is replaced by an open-circuit, hot-air generator 17 which provides for drawing cold air from the outside of casing 2; heating the external cold air to a predetermined temperature, normally higher than the temperature of the air in revolving drum 3; feeding the heated external air into revolving drum 3, where it flows over, to rapidly dry, the laundry inside the drum; and finally drawing the moist warm air out of revolving drum 3 back to the outside of casing 2.
  • the open-circuit, hot-air generator 17 differs from the closed-circuit, hot-air generator 7 in that the air/air heat exchanger 10 is missing, and that air recirculating conduit 8 is replaced by two air circulating conduits 8a and 8b each connecting revolving drum 3 with the outside of casing 2.
  • the intake end of air circulating conduit 8a communicates with the outside of casing 2, preferably, though not necessarily, on the rear wall of casing 2, whereas the exhaust end of air circulating conduit 8a is coupled in airtight manner directly to the end wall 3a of revolving drum 3.
  • the intake end of air circulating conduit 8b is integrated in door 4, and is faced to the front opening of revolving drum 3, whereas the exhaust end of air circulating conduit 8b communicates with the outside of casing 2.
  • electric centrifugal fan 9 is located along air circulating conduit 8a and/or 8b to produce an airflow f which flows, in closes succession, through air circulating conduit 8a, through revolving drum 3 and over the laundry inside drum 3, and finally through air circulating conduit 8ab back to the outside; whereas electric heater 12 (in the example shown, a resistor) is located along air circulating conduit 8a for rapidly heating the airflow f arriving from the outside and directed towards the revolving drum 3, so that the air entering into revolving drum 3 is heated rapidly to a temperature preferably, though not necessarily, higher than or equal to that of the same air flowing out of revolving drum 3.
  • electric heater 12 in the example shown, a resistor
  • heat exchanger 13 is placed along air circulating conduit 8b so that the airflow f from revolving drum 3 is cooled by the natural chimneypot-effect generated ascensional convective current g of cold air from outside casing 2 to condense part of the surplus moisture inside airflow f from revolving drum 3.
  • heat exchanger 13 has a condensed-water canister 13a for collecting the liquid distilled water produced, when the drier is running, inside air duct 14 by condensation of the surplus moisture in airflow f arriving from revolving drum 3, and hot-air generator 17 also comprises a pressurized-steam generator 18 which, on command, drains distilled water from canister 13a and produces jets of steam into revolving drum 3 to eliminate or at least greatly reduce wrinkling of the fabrics produced during the drying cycle.
  • condensed-water canister 13a is preferably, though not necessarily, located on the bottom of casing 2, just beneath the manifold closing the lower end of the vertically-oriented tubular element forming the main section of air duct 14, whereas pressurized-steam generator 18 comprises an instant in-pressure electric boiler 19 designed to receive a given quantity of water and immediately convert it into a stream of high-pressure steam whose pressure is slightly higher than external pressure; a steam injection nozzle 20 located inside casing 2, in the collar connecting the front opening of revolving drum 3 to opening 2a in the front face of casing 2, and structured for projecting jets of high-pressure steam directly inside drying drum 3; and a steam exhaust pipe 21 connecting the outlet of boiler 19 to the steam injection nozzle 20 for feeding the high-pressure steam produced by boiler 19 directly to nozzle 20.
  • pressurized-steam generator 18 is provided with a water pump 22 which sucks, on command, distilled water from canister 13a and feed it to electric boiler 19, and with an electrovalve 23 or similar electrically-operated flow-regulating valve which is located along the pipe connecting pump 22 to boiler 19 for controlling the flow rate of distilled water towards electric boiler 19.
  • the electronic central control unit 24 of laundry drier 1 controls electric boiler 19, water pump 22 and electrovalve 23 in predetermined manner, as memorized inside it, to feed jets of high-pressure steam into revolving drum 3 when required by the user-selected drying cycle.
  • hot-air generator 17 may optionally comprise an auxiliary electric circulating fan 25 or other type of air circulating pump, which is housed into air duct 15 for generating, on command and when the natural ascensional convective current g along air duct 15 does not suffices in sufficiently cooling the airflow f from revolving drum 3, an additional force-circulated airflow along air duct 15 for better cooling the partitioning wall separating air ducts 14 and 15, and so the airflow f arriving from revolving drum 3.
  • auxiliary electric circulating fan 25 or other type of air circulating pump
  • pressurized-steam generator 18 may be integrated also in hot-air generator 7. In which case, pressurized-steam generator 18 drains distilled water from canister 10a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
  • Centrifugal Separators (AREA)
EP08156769A 2008-05-22 2008-05-22 Séchoir à linge pour usage domestique Not-in-force EP2123823B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT08156769T ATE517207T1 (de) 2008-05-22 2008-05-22 Haushaltswäschetrockner
EP08156769A EP2123823B1 (fr) 2008-05-22 2008-05-22 Séchoir à linge pour usage domestique
PL08156769T PL2123823T3 (pl) 2008-05-22 2008-05-22 Domowa suszarka do prania
ES08156769T ES2370918T3 (es) 2008-05-22 2008-05-22 Secadora doméstica de ropa.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08156769A EP2123823B1 (fr) 2008-05-22 2008-05-22 Séchoir à linge pour usage domestique

Publications (2)

Publication Number Publication Date
EP2123823A1 true EP2123823A1 (fr) 2009-11-25
EP2123823B1 EP2123823B1 (fr) 2011-07-20

Family

ID=39846585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08156769A Not-in-force EP2123823B1 (fr) 2008-05-22 2008-05-22 Séchoir à linge pour usage domestique

Country Status (4)

Country Link
EP (1) EP2123823B1 (fr)
AT (1) ATE517207T1 (fr)
ES (1) ES2370918T3 (fr)
PL (1) PL2123823T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102889756A (zh) * 2012-10-24 2013-01-23 无锡市通和工机有限公司 箱式干燥器
EP2573253A1 (fr) * 2011-09-26 2013-03-27 Electrolux Home Products Corporation N.V. Sèche-linge à pompe à chaleur
CN105780432A (zh) * 2014-12-26 2016-07-20 博西华电器（江苏）有限公司 衣物烘干机及其工作方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102337665B (zh) * 2010-07-16 2013-03-06 田飞 具有热回收装置的烘干机
CN103868274A (zh) * 2012-12-12 2014-06-18 李家海 一种新型高效节能的电供热式药品工业干燥机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179821A (en) 1977-11-21 1979-12-25 General Electric Company Dishwasher vent arrangement
FR2646501A1 (fr) * 1989-04-28 1990-11-02 Esswein Sa Condenseur d'humidite pour air chaud et humide, et appareil muni d'un tel condenseur
US5146693A (en) * 1989-12-01 1992-09-15 Industrie Zanussi S.P.A. Steam condensation device in a dryer or combination washer/dryer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179821A (en) 1977-11-21 1979-12-25 General Electric Company Dishwasher vent arrangement
FR2646501A1 (fr) * 1989-04-28 1990-11-02 Esswein Sa Condenseur d'humidite pour air chaud et humide, et appareil muni d'un tel condenseur
US5146693A (en) * 1989-12-01 1992-09-15 Industrie Zanussi S.P.A. Steam condensation device in a dryer or combination washer/dryer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2573253A1 (fr) * 2011-09-26 2013-03-27 Electrolux Home Products Corporation N.V. Sèche-linge à pompe à chaleur
WO2013045316A1 (fr) * 2011-09-26 2013-04-04 Electrolux Home Products Corporation N.V. Séchoir à pompe à chaleur
CN103827385A (zh) * 2011-09-26 2014-05-28 伊莱克斯家用产品股份有限公司 热泵干燥机
CN102889756A (zh) * 2012-10-24 2013-01-23 无锡市通和工机有限公司 箱式干燥器
CN105780432A (zh) * 2014-12-26 2016-07-20 博西华电器（江苏）有限公司 衣物烘干机及其工作方法
CN105780432B (zh) * 2014-12-26 2019-07-23 博西华电器（江苏）有限公司 衣物烘干机及其工作方法

Also Published As

Publication number Publication date
ATE517207T1 (de) 2011-08-15
PL2123823T3 (pl) 2011-12-30
EP2123823B1 (fr) 2011-07-20
ES2370918T3 (es) 2011-12-23

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