EP0094356A1 - Trockner, insbesondere Wäschetrockenschrank - Google Patents

Trockner, insbesondere Wäschetrockenschrank Download PDF

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Publication number
EP0094356A1
EP0094356A1 EP83830088A EP83830088A EP0094356A1 EP 0094356 A1 EP0094356 A1 EP 0094356A1 EP 83830088 A EP83830088 A EP 83830088A EP 83830088 A EP83830088 A EP 83830088A EP 0094356 A1 EP0094356 A1 EP 0094356A1
Authority
EP
European Patent Office
Prior art keywords
air
circulating
drying chamber
cooling passage
passage
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
EP83830088A
Other languages
English (en)
French (fr)
Other versions
EP0094356B1 (de
Inventor
Carlo Meda
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.)
Indesit Industria Elettrodomestici Italiana SpA
Original Assignee
Indesit Industria Elettrodomestici Italiana SpA
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 Indesit Industria Elettrodomestici Italiana SpA filed Critical Indesit Industria Elettrodomestici Italiana SpA
Publication of EP0094356A1 publication Critical patent/EP0094356A1/de
Application granted granted Critical
Publication of EP0094356B1 publication Critical patent/EP0094356B1/de
Expired legal-status Critical Current

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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
    • D06F58/10—Drying cabinets or drying chambers having heating or ventilating means
    • 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
    • D06F58/20—General details of domestic laundry dryers 

Definitions

  • the present invention relates to driers specially designed for household use as clothes-drying cabinets but which can be used equally well for drying various types of industrial articles.
  • the invention relates to a drier consisting of a drying chamber in a casing with closed-circuit air circulating means in the chamber itself; means for heating the circulating air; an air cooling passage for condensing humidity, situated next to the drying chamber with a top inlet communicating with the top of the drying chamber and a bottom outlet; and a refrigerating circuit which acts as a heat pump and comprises, among other things, a compressor, a condenser acting as the above mentioned heating means, and an evaporator in the form of a heat exchanger situated in the cooling passage.
  • This arrangement provides for a relatively low loss in sensible heat in the damp air so that the refrigerating circuit condenser requires relatively little energy to compensate for the sensible heat absorbed by the evaporator or a cold wall in the cooling passage.
  • the aim of the present invention is to provide a unit as described earlier but which does not pose this problem.
  • this aim is achieved by a drying unit, characterised by the fact that the casing comprises an outside air inlet which communicates with the bottom of the drying chamber via the above mentioned circulating means and that the bottom end of the cooling passage comes out into the outside air.
  • This arrangement provides for drying cycles with lower, more uniform refrigeration circuit pressures and temperatures than would be possible if the unit operated with no communication with the outside air. Supposing, for example, as is usually the case, that the temperature in the room where the drier is installed does not vary during the drying cycle. This means there will be no substantial variation in the temperature difference with which heat is exchanged between the air and the refrigerating fluid on the condenser and evaporator. In other words, air pumped in from outside acts as a sort of "brake" on the rise in temperature and the temperature differences in the refrigerating circuit.
  • a further advantage of the unit according to the present invention is that it also uses the heat content of the outside air.
  • Supposing the unit e.g. a clothes-drier, is installed in a room with an air temperature of 20°C, 60% relative humidity and air containing 8.73 gr of water per kilo.
  • the heat content of the air will oe 10.10 kcal/kg. If the unit is designed so that air is blown off into the atmosphere, through the cooling passage, at 12°C with 100% relative humidity, with the same 8.73 gr of water per kilo, its heat content will be 8.10 kcal/kg.
  • the air pumped in from the outside will supply 2 kcal/ kg with consequent saving in energy.
  • the unit shown in the drawing is in the form of a cabinet with a casing of sheet metal or other suitable material.
  • the casing contains a drying chamber 10 defined by side walls 12, a front door 14, a top 16 and rear dividing wall 18. Walls 12 and 18, top 16 and front door 14 are all lagged.
  • rear dividing wall 18 does not extend as far as top 16.
  • the edge of dividing wall 18, together with top 16, defines a horizontal slot 20.
  • Drying chamber 10 is fitted inside with hooks and rails on which to hang clothes or other items, an arrangement that turns the unit into a household clothes-drying cabinet.
  • drying chamber 10 may be fitted with grate shelves for drying items other than clothes, e.g. photographs, tobacco leaves, fruit, etc.
  • the casing has a rear or outside wall 24 which, together with dividing wall 18, forms a space 26 which, as we shall explain later, acts as a cooling passage.
  • Rear wall 24 is made of sheet metal or other heat-conducting material to act as a cooling means by exchanging heat with the outside air. For even better heat exchange performance, wall 24 may be fitted with fins.
  • the bottom 28 of drying chamber 10 is fitted over another bottom panel 30 so as to form a space 32 which, as we shall see later, acts as a passage for heating and air circulation.
  • the casing or cabinet has yet another horizontal structural panel 33 under bottom panel 30 which, together with the latter, forms a bottom compartment 34. The latter is defined at the front by wall 36 and at the rear by a bottom extension of dividing wall 18. For reasons explained later, compartment 34 communicates with the outside air through opening 38 (e.g. a slit) in wall 36 fitted with a grate 40.
  • heating and circulating passage 32 communicates with both the bottom of chamber 10 and compartment 34.
  • the through openings, preferably slits, are marked 42 and 44.
  • passage 32 communicates with the bottom of chamber 10 with circulating means in the form of an electric blower inbetween.
  • the casing or cabinet has a built-in refrigerating circuit which acts as a heat pump and comprises a known hermetic electric compressor 48, a condenser 50, a trottling element 52 and an evaporator 54.
  • the hermetic compressor 48 is a normal household refrigerator type situated in compartment 34 and secured to structural wall 33.
  • the trottling element 52 is preferably a capillary tube.
  • Condenser 50 is in the form of a box heat exchanger which extends right across the heating and circulating passage 32.
  • Evaporator 54 consists of a box heat exchanger, very similar to heat exchanger 50, situated at the bottom of cooling passage 26 and extending right across it.
  • Under exchanger-evaporator 54 in rear wall 24 is an opening (preferably a slit) 56 through which cooling passage 26 communicates with the outside air.
  • a receptacle 58 in the form of a gutter which, through drain opening 60, leads to a drip tank or box 62 under structural wall 32.
  • Box 62 slides inside the cabinet for collecting condensed water formed, as we shall see, in cooling passage 26 and exchanger-evaporator 54 during operation of the unit. Condensed water dripping into receptacle 58 is collected in box 62 which can be pulled out of the cabinet.
  • Box 62 is preferably fitted with a transparent (e.g. plastic) front wall so the level of water can be seen for emptying the box periodically.
  • receptacle 58 can be connected directly to a water drain.
  • the drier described and shown in the drawing operates as follows:
  • Electric blower 46 circulates the air in a closed circuit, sucking it up from chamber 10 through opening 42, sending it through condenser 50 and blowing it out into the bottom of chamber 10. At the same time, electric blower 46 sucks up air from the outside through opening 38, compartment 34 and opening 44. When it passes into compartment 34, the air sucked up from the outside flows over the casing of compressor 48, cooling the latter and being heated by it. The air sucked up from the outside also flows through exchanger-condenser 50 and is blown into the bottom of chamber 10 by blower 46. The air circulating in chamber 10 and heated gradually in exchanger-condenser 50 becomes saturated with humidity. The hottest air containing most humidity forms a layer or "dome" at the top of chamber 10 which traps in the heat to improve the efficiency of the unit.
  • the cooled air is then exhausted to the outside through opening 56.
  • the size of air inlets 38 and 56 and circulation passages 26 and 32 and the power of air circulating means 46 and heat exchangers 50 and 54 are designed so that the air circulating inside the casing is such that the air flowing over evaporator 54 and condenser 50 is automatically less at the end of the drying cycle than at the beginning.
  • Operation of the unit is regulated automatically: as the drying cycle proceeds, the temperature of the air in chamber 10 rises while its relative humidity falls. Consequently there is also a fall in the specific weight of the air, in the socalled "reverse drawing” effect and the amount of air exhausted to the outside.
  • the latter fall is an advantage as far as the evaporator is concerned in that it receives less and less heat from the air thus preventing any unwanted rise in temperature. What is more, the smaller the amount of air being supplied to the evaporator, the easier it is to cool down to dew point which provides for better dehumidification.
  • blower 46 provides yet another advantage: the load loss in cooling passage 26 creates a certain pressure in chamber 10 which makes the air in the chamber less flexible, so to speak, thus preventing it from finding its own way out through slit 20. This ensures all parts of chamber 10 are swept more or less evenly so as to dry the clothes or other items in the .chamber more uniformly.
  • condenser 50 in circulation passage 32 could be replaced entirely or in part by a coil pipe in drying chamber 10 in the form of horizontal bars on which to hang clothes or other items, as described in Patent Application NQ 67.380-A/82 filed by the present Applicant.
  • a further variation of the specific arrangement described could be to fit the outside air inlet 38 and outlet 56 with temporary shutters, e.g. controlled by a timer on the unit, which provide for operating the cabinet under airtight conditions during the intermediate drying stage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP83830088A 1982-05-10 1983-05-03 Trockner, insbesondere Wäschetrockenschrank Expired EP0094356B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6760882 1982-05-10
IT67608/82A IT1155193B (it) 1982-05-10 1982-05-10 Apparecchio essicatore particolarmente armadio asciugabiancheria

Publications (2)

Publication Number Publication Date
EP0094356A1 true EP0094356A1 (de) 1983-11-16
EP0094356B1 EP0094356B1 (de) 1986-07-02

Family

ID=11303834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83830088A Expired EP0094356B1 (de) 1982-05-10 1983-05-03 Trockner, insbesondere Wäschetrockenschrank

Country Status (3)

Country Link
EP (1) EP0094356B1 (de)
DE (1) DE3364365D1 (de)
IT (1) IT1155193B (de)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259356A (en) * 1991-08-16 1993-03-10 Liang Chao Jung Clothes dryer
WO1993013842A1 (en) * 1992-01-13 1993-07-22 Jwi, Inc. Batch-type sludge drier
AU648333B2 (en) * 1991-08-21 1994-04-21 Chao-Jung Liang Clothes drying machine
GB2289752A (en) * 1994-05-23 1995-11-29 Acma Thermal Research Pte Ltd Clothes dryer
EP1146161A1 (de) * 2000-04-10 2001-10-17 Whirlpool Corporation Zubehör für Trommelwäschetrockner
WO2002000990A2 (de) * 2000-06-28 2002-01-03 Hans Baltes Verfahren und vorrichtung zur bügelfreien trocknung von feuchtem gut, insbesondere feuchter wäsche
WO2003074778A1 (en) * 2002-03-01 2003-09-12 Ayla Cevik A method and an apparatus for automatic ironing
GB2394271A (en) * 2002-10-18 2004-04-21 Nikolaos Kanavas A locker for drying clothing
US6881577B2 (en) 2000-06-28 2005-04-19 Max-Delbrück-Centrum für Molekulare Medizin Method for improving transfection efficiency
WO2006009774A2 (en) * 2004-06-18 2006-01-26 Maruca Robert E Low temperature clothes dryer
WO2006057026A1 (en) * 2004-11-25 2006-06-01 Eko S.P.A. Ironing board and steam supply device
EP1961853A1 (de) * 2005-11-17 2008-08-27 Kabushiki Kaisha Toshiba Wäschetrockner
US20100107438A1 (en) * 2008-10-31 2010-05-06 Wilhelm Bringewatt Method of, and apparatus for, treating the waste air from heated laundry machines
CN101302708B (zh) * 2007-02-16 2010-06-16 株式会社东芝 衣物干燥机
US20120017465A1 (en) * 2010-07-26 2012-01-26 Beers David G Apparatus and method for refrigerant cycle capacity acceleration
CN102926178A (zh) * 2012-11-29 2013-02-13 惠而浦(中国)投资有限公司 冷凝式干衣机及干衣方法
US8601717B2 (en) 2010-07-26 2013-12-10 General Electric Company Apparatus and method for refrigeration cycle capacity enhancement
US8826559B2 (en) 2004-12-06 2014-09-09 Lg Electronics Inc. Clothes dryer
US8833095B2 (en) 2010-07-26 2014-09-16 General Electric Company Apparatus and method for dry cycle completion control in heat pump dryer by declining capacity indication by rolling average compressor watts or heat exchanger pressure or temperature
CN104631070A (zh) * 2013-11-07 2015-05-20 杭州三花研究院有限公司 干衣机
EP2047026A4 (de) * 2006-07-04 2015-07-15 Lg Electronics Inc Wäschebehandlungsvorrichtung
CN105544162A (zh) * 2015-12-04 2016-05-04 无锡小天鹅股份有限公司 洗干一体机
CN105862371A (zh) * 2016-05-26 2016-08-17 无锡小天鹅股份有限公司 干衣机和干衣机的控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104532525B (zh) * 2014-11-28 2017-01-25 浙江普林艾尔电器工业有限公司 一种热泵干衣柜及其设计制作方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1542480A (fr) * 1966-03-23 1900-01-01 Dispositif pour le séchage accéléré d'objets
US3064358A (en) * 1958-02-17 1962-11-20 Anthony A Giuffre Clothes drying device
FR1370792A (fr) * 1963-05-02 1964-08-28 Séchoir à linge à condenseur frigorifique
FR1390083A (fr) * 1964-04-23 1965-02-19 Armoire sèche-linge
FR1458677A (fr) * 1965-10-01 1966-03-04 Georges Deoust Ets Séchoir à linge
FR1439185A (fr) * 1965-04-07 1966-05-20 Armoire sèche-linge à circuit fermé
GB1133098A (en) * 1964-11-20 1968-11-06 John Edward Randell Improvements in and relating to drying apparatus
FR1562056A (de) * 1968-01-22 1969-04-04
FR1598605A (de) * 1968-12-13 1970-07-06
DE2218440B1 (de) * 1972-04-17 1973-06-28 Wilhelm Dr.-Ing. 5340 Bad Honnef Lepper Verfahren zum Trocknen von Wasche oder dgl und Vorrichtung zur Durch führung des Verfahrens

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1154032B (it) * 1981-03-09 1987-01-21 Carlo Meda Essiccatore particolarmente asciuga biancheria dotato di un circuito frigorifero fungente da pompa di calore

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064358A (en) * 1958-02-17 1962-11-20 Anthony A Giuffre Clothes drying device
FR1370792A (fr) * 1963-05-02 1964-08-28 Séchoir à linge à condenseur frigorifique
FR1390083A (fr) * 1964-04-23 1965-02-19 Armoire sèche-linge
GB1133098A (en) * 1964-11-20 1968-11-06 John Edward Randell Improvements in and relating to drying apparatus
FR1439185A (fr) * 1965-04-07 1966-05-20 Armoire sèche-linge à circuit fermé
FR1458677A (fr) * 1965-10-01 1966-03-04 Georges Deoust Ets Séchoir à linge
FR1542480A (fr) * 1966-03-23 1900-01-01 Dispositif pour le séchage accéléré d'objets
FR1562056A (de) * 1968-01-22 1969-04-04
FR1598605A (de) * 1968-12-13 1970-07-06
DE2218440B1 (de) * 1972-04-17 1973-06-28 Wilhelm Dr.-Ing. 5340 Bad Honnef Lepper Verfahren zum Trocknen von Wasche oder dgl und Vorrichtung zur Durch führung des Verfahrens

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259356A (en) * 1991-08-16 1993-03-10 Liang Chao Jung Clothes dryer
AU648333B2 (en) * 1991-08-21 1994-04-21 Chao-Jung Liang Clothes drying machine
WO1993013842A1 (en) * 1992-01-13 1993-07-22 Jwi, Inc. Batch-type sludge drier
GB2289752A (en) * 1994-05-23 1995-11-29 Acma Thermal Research Pte Ltd Clothes dryer
EP1146161A1 (de) * 2000-04-10 2001-10-17 Whirlpool Corporation Zubehör für Trommelwäschetrockner
WO2002000990A2 (de) * 2000-06-28 2002-01-03 Hans Baltes Verfahren und vorrichtung zur bügelfreien trocknung von feuchtem gut, insbesondere feuchter wäsche
WO2002000990A3 (de) * 2000-06-28 2002-06-27 Hans Baltes Verfahren und vorrichtung zur bügelfreien trocknung von feuchtem gut, insbesondere feuchter wäsche
US6796055B2 (en) 2000-06-28 2004-09-28 Heinz Szelies Method and device for the non-iron drying of damp material, in particular damp laundry
US6881577B2 (en) 2000-06-28 2005-04-19 Max-Delbrück-Centrum für Molekulare Medizin Method for improving transfection efficiency
WO2003074778A1 (en) * 2002-03-01 2003-09-12 Ayla Cevik A method and an apparatus for automatic ironing
GB2394271A (en) * 2002-10-18 2004-04-21 Nikolaos Kanavas A locker for drying clothing
GB2394271B (en) * 2002-10-18 2005-07-13 Nikolaos Kanavas A locker for drying clothing
US7377052B2 (en) 2004-06-18 2008-05-27 Maruca Robert E Low temperature clothes dryer
US7191546B2 (en) 2004-06-18 2007-03-20 Maruca Robert E Low temperature clothes dryer
WO2006009774A3 (en) * 2004-06-18 2007-12-13 Robert E Maruca Low temperature clothes dryer
WO2006009774A2 (en) * 2004-06-18 2006-01-26 Maruca Robert E Low temperature clothes dryer
WO2006057026A1 (en) * 2004-11-25 2006-06-01 Eko S.P.A. Ironing board and steam supply device
US8826559B2 (en) 2004-12-06 2014-09-09 Lg Electronics Inc. Clothes dryer
US8863400B2 (en) * 2004-12-06 2014-10-21 Lg Electronics Inc. Clothes dryer
EP1961853A1 (de) * 2005-11-17 2008-08-27 Kabushiki Kaisha Toshiba Wäschetrockner
EP1961853A4 (de) * 2005-11-17 2011-06-22 Toshiba Kk Wäschetrockner
EP2047026A4 (de) * 2006-07-04 2015-07-15 Lg Electronics Inc Wäschebehandlungsvorrichtung
CN101302708B (zh) * 2007-02-16 2010-06-16 株式会社东芝 衣物干燥机
US20100107438A1 (en) * 2008-10-31 2010-05-06 Wilhelm Bringewatt Method of, and apparatus for, treating the waste air from heated laundry machines
US8567090B2 (en) * 2008-10-31 2013-10-29 Herbert Kannegiesser Gmbh Method of, and apparatus for, treating the waste air from heated laundry machines
US8601717B2 (en) 2010-07-26 2013-12-10 General Electric Company Apparatus and method for refrigeration cycle capacity enhancement
US8528227B2 (en) * 2010-07-26 2013-09-10 General Electric Company Apparatus and method for refrigerant cycle capacity acceleration
US8833095B2 (en) 2010-07-26 2014-09-16 General Electric Company Apparatus and method for dry cycle completion control in heat pump dryer by declining capacity indication by rolling average compressor watts or heat exchanger pressure or temperature
US20120017465A1 (en) * 2010-07-26 2012-01-26 Beers David G Apparatus and method for refrigerant cycle capacity acceleration
CN102926178A (zh) * 2012-11-29 2013-02-13 惠而浦(中国)投资有限公司 冷凝式干衣机及干衣方法
CN104631070A (zh) * 2013-11-07 2015-05-20 杭州三花研究院有限公司 干衣机
CN105544162A (zh) * 2015-12-04 2016-05-04 无锡小天鹅股份有限公司 洗干一体机
CN105862371A (zh) * 2016-05-26 2016-08-17 无锡小天鹅股份有限公司 干衣机和干衣机的控制方法

Also Published As

Publication number Publication date
EP0094356B1 (de) 1986-07-02
IT1155193B (it) 1987-01-21
IT8267608A0 (it) 1982-05-10
DE3364365D1 (en) 1986-08-07

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