EP2458066A1 - Sèche-linge à cycle fermé - Google Patents

Sèche-linge à cycle fermé Download PDF

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Publication number
EP2458066A1
EP2458066A1 EP10192681A EP10192681A EP2458066A1 EP 2458066 A1 EP2458066 A1 EP 2458066A1 EP 10192681 A EP10192681 A EP 10192681A EP 10192681 A EP10192681 A EP 10192681A EP 2458066 A1 EP2458066 A1 EP 2458066A1
Authority
EP
European Patent Office
Prior art keywords
air
closed cycle
dryer according
cycle dryer
hot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10192681A
Other languages
German (de)
English (en)
Inventor
Thomas Kroeger
Ralf Haselmeier
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
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 Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP10192681A priority Critical patent/EP2458066A1/fr
Publication of EP2458066A1 publication Critical patent/EP2458066A1/fr
Withdrawn legal-status Critical Current

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Classifications

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

Definitions

  • the present invention relates to a closed cycle dryer comprising a heating unit used to heat the air that is blown in a rotating drum and a condensing unit upstream the heating unit comprising an air-cooled heat exchanger where the hot and humid air downstream the drum is contacting a first side of a wall, a second side of said wall of the heat exchanger being contacted by flowing air at ambient temperature.
  • the present invention relates also to washing-drying machine in which the laundry can be washed and then dried in the same appliance.
  • wall referred to the heat exchanger we mean the heat exchanging surface which may comprises actually several tubes or plates.
  • the condensing unit In this kind of domestic dryer for drying laundry (after washing and spinning thereof) the condensing unit is used to remove moisture which condenses on the first side of the exchanging surface and is collected in a water reservoir or container. In such dryers the process air runs in a closed loop. The thermal connection to the ambient air takes place through the wall of the heat exchanger. Process air and cooling air are not mixed.
  • the applicant has discovered a simple way of reducing energy consumption of around 2% or more without impacting adversely other performance characteristics of the appliance. Moreover the solution according to the invention has also other advantages since it decreases the drying cycle time and increases the condensation efficiency by about 11 % and 15% respectively.
  • At least a portion of the heat exchange surfaces is provided with holes through which a controlled portion of hot and humid air coming from the rotating drum can be exhausted.
  • the rotating drum of a closed cycle dryer which is fed in 10a with hot air downstream a heater 12.
  • the still hot and humid air is exhausted in 10b from the drum 10 and, after a filter 18, is blown by a fan 14 though a condensing unit 15 provided with an air-cooled heat exchanger 16.
  • the dry and cooled air 22 is then re-circulated to the drum 10.
  • the heat exchanger 16 presents a wall 17 having two sides. A first side 17a is contacted by the hot and humid air 13 coming from the drum 10 while a second side 17b is contacted by air 19 at ambient temperature.
  • the wall 17 is provided with holes 21 though which a portion of the hot and humid air (and therefore a not-condensed portion of the water vapor) can be directly exhausted to the ambient.
  • Already condensed vapor (liquid) can also be exhausted and will be re-evaporated on the cooling side of the heat exchanger. Condensing and re-evaporating on the cold side will be in a zero energy balance.
  • By using a predetermined number and diameter of holes 21 allows adjusting condensation efficiency, energy consumption and drying time. With the given holes the adjustment of the mentioned values are fixed. Not condensing completely the steam leads to an improvement of drying time and energy consumption.
  • FIG 2 it is shown a detail of the air-cooled heat exchanger 16 where the exchange surface or wall 17 is defined by a plurality of flattened and stacked tubes 24 where a defined distance between each couple of tubes is maintained.
  • the heat exchanger 16 is of the removable type for cleaning purposes.
  • four tubes are used and only the upper tube is provided with circular holes 21. Such holes are preferably located sidewise near the end 24a of the tube 24 which is close to the cooling air entrance indicated with reference 26.
  • each tube 24 with from 2 to 15 holes having a diameter from 2 to 8 mm for a total cross section area comprised between 1 and 2 cm 2 .
  • FIG 3 it is shown a second embodiment where the holes 21 can be opened and closed by the customer with levers 30 (acting as rotating locks) that are mounted on each flattened tube or plate 24. If the customer opens the holes 21 the process is accelerated and the condensation is reduced and also the energy consumption as well. With the levers 30 the holes 21 can be opened or closed to adjust humidity that will be lead out to ambient.
  • levers 30 acting as rotating locks
  • the dryer can be provided with an electronic control for automatically adjusting the total free area of the holes 21 depending on the drying cycle chosen by the user and by the actual working condition of the appliances (for instance load of laundry, water content thereof, ambient temperature etc.).
  • a porous material or a kind o filter can be inserted into the holes 21 in order to avoid lint entering the cold air flow and accumulate on the cold air flow side.
EP10192681A 2010-11-26 2010-11-26 Sèche-linge à cycle fermé Withdrawn EP2458066A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10192681A EP2458066A1 (fr) 2010-11-26 2010-11-26 Sèche-linge à cycle fermé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10192681A EP2458066A1 (fr) 2010-11-26 2010-11-26 Sèche-linge à cycle fermé

Publications (1)

Publication Number Publication Date
EP2458066A1 true EP2458066A1 (fr) 2012-05-30

Family

ID=43797733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10192681A Withdrawn EP2458066A1 (fr) 2010-11-26 2010-11-26 Sèche-linge à cycle fermé

Country Status (1)

Country Link
EP (1) EP2458066A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013182403A1 (fr) * 2012-06-05 2013-12-12 Arcelik Anonim Sirketi Sèche-linge ayant un condenseur refroidi à l'air

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10346107A1 (de) * 2003-10-04 2005-06-30 Miele & Cie. Kg Bodenmodul für einen Kondensationswäschetrockner
JP2008086424A (ja) * 2006-09-29 2008-04-17 Sanyo Electric Co Ltd 乾燥機
EP2042646A1 (fr) * 2007-09-27 2009-04-01 Electrolux Home Products Corporation N.V. Sèche-linge domestique
JP2010000278A (ja) * 2008-06-23 2010-01-07 Panasonic Corp 洗濯乾燥機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10346107A1 (de) * 2003-10-04 2005-06-30 Miele & Cie. Kg Bodenmodul für einen Kondensationswäschetrockner
JP2008086424A (ja) * 2006-09-29 2008-04-17 Sanyo Electric Co Ltd 乾燥機
EP2042646A1 (fr) * 2007-09-27 2009-04-01 Electrolux Home Products Corporation N.V. Sèche-linge domestique
JP2010000278A (ja) * 2008-06-23 2010-01-07 Panasonic Corp 洗濯乾燥機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013182403A1 (fr) * 2012-06-05 2013-12-12 Arcelik Anonim Sirketi Sèche-linge ayant un condenseur refroidi à l'air

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