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EP2479337B1 - Haushaltgerät zum Trocknen von Gegenständen - Google Patents

Haushaltgerät zum Trocknen von Gegenständen Download PDF

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Publication number
EP2479337B1
EP2479337B1 EP11151801.5A EP11151801A EP2479337B1 EP 2479337 B1 EP2479337 B1 EP 2479337B1 EP 11151801 A EP11151801 A EP 11151801A EP 2479337 B1 EP2479337 B1 EP 2479337B1
Authority
EP
European Patent Office
Prior art keywords
heat
drying
heat exchange
household appliance
exchange medium
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
EP11151801.5A
Other languages
English (en)
French (fr)
Other versions
EP2479337A1 (de
Inventor
Alberto Bison
Francesco Cavarretta
Stefano Zandona'
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
Priority to EP11151801.5A priority Critical patent/EP2479337B1/de
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to CN2012800062187A priority patent/CN103476983A/zh
Priority to AU2012210733A priority patent/AU2012210733A1/en
Priority to RU2013138445/12A priority patent/RU2013138445A/ru
Priority to US13/981,038 priority patent/US20140020257A1/en
Priority to PCT/EP2012/050385 priority patent/WO2012100986A1/en
Priority to BR112013018851A priority patent/BR112013018851A2/pt
Publication of EP2479337A1 publication Critical patent/EP2479337A1/de
Application granted granted Critical
Publication of EP2479337B1 publication Critical patent/EP2479337B1/de
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 
    • 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

Definitions

  • the present application is directed to a household appliance for drying objects, in particular laundry.
  • Appliances for drying laundry such as tumble dryers, as for example EP 2 067 890 , generally comprise a drying chamber for accommodating therein the objects to be dried. Heated and dehumidified drying medium is guided through the drying chamber. Upon passing the drying chamber and objects, the heated and dehumidified drying medium takes up humidity and at the same time cools down. The drying medium then exits the drying chamber, thereby discharging humidity from the drying chamber and the objects.
  • Heat pumps generally operate with refrigerants as working fluids.
  • Traditional refrigerants such as Hydrochlorofluorocarbons (HCFC) and Hydrofluorocarbons (HFC), are known to cause damages to the environment, inter alia by their ozone-destroying properties and most of all by their high global warning potential (GWP) which is the measure of how much a given mass of greenhouse gas is estimated to contribute to global warming.
  • GWP global warning potential
  • refrigerants being far less harmful and toxic and having a reduced impact on the environment in terms of both ozone-destroying properties and global warning potential.
  • a household appliance for drying objects in particular laundry, the appliance comprising a drying chamber adapted to accommodate therein the objects, and a first circuit for impinging the drying chamber with a drying medium in a circulating manner, and further comprising a heat pump with a second circuit for circulating a heat exchange medium, wherein the first and second circuit being coupled in a heat exchanging manner, and wherein the heat exchange medium being of hydro-fluoro-olefine type.
  • the appliance which may in particular be a household tumble dryer, comprises a heat pump.
  • a heat pump By this, residual heat from the drying medium exhausted from the drying chamber after impinging the objects to be dried can be extracted and, by adequately operating the heat pump, reused for heating drying medium prior to entering the drying chamber.
  • the appliance can be operated with advantageous energy efficiency.
  • drying medium can be air, in particular ambient air.
  • the proposed heat exchange medium is of hydro-fluoro-olefine type (HFO-type), which is particularly advantageous with respect to environmental impacts and toxicity. It has shown that the proposed type of heat exchange medium is also particularly suitable for the heat exchange process and related parameters of appliances for drying objects, such as laundry, in particular for use with tumble dryers of household application.
  • HFO-type hydro-fluoro-olefine type
  • a further advantage is that the proposed heat exchange medium can be used as a substitute for conventional heat exchange media, such as R134a refrigerant, the latter being by far more detrimental to the environment.
  • Another advantage is that the proposed heat exchange medium can be used without drastic impacts on structure and construction of known appliances.
  • the mentioned heat exchange media are particularly suitable for use with the proposed appliances such as laundry dryers, in particular laundry tumble dryers.
  • the heat exchange medium has at least one of preferred features mentioned below.
  • the critical temperatures and temperature ranges are well suited for conditions prevailing with heat pump tumble dryers, such that safe operability of the appliance can be obtained.
  • the advantages mentioned beforehand apply mutatis mutandis.
  • the mentioned values of the nominal heat of vaporization are particularly suitable for use with heat pump tumble dryers as proposed herein.
  • the heat exchange medium has a global warming potential (GWP) index lying in a range from 1 to 15, preferably from 2 to 8, more preferably from 4 to 6 (equivalent carbon dioxide, which is a quantity that describes, for a given mixture and amount of greenhouse gas, the amount of CO 2 that would have the same global warming potential, the GWP of CO 2 is by convention equal to 1).
  • GWP index may be about 4
  • GWP index may be about 6.
  • the heat exchange medium has at least one of a lower flammability level (LFL) of about 6.2 Vol% and an upper flammability level (UFL) of about 12.3 Vol%.
  • LFL lower flammability level
  • UFL upper flammability level
  • Such flammability levels are of particular advantage with respect to safety considerations related to heat pump tumble dryers.
  • the heat exchange medium preferably has at least one of a minimum ignition energy (MIE) of more than 3000 mJ and a burning velocity (BV) of about 1.5 cm/s.
  • MIE minimum ignition energy
  • BV burning velocity
  • the heat pump has a nominal cooling power between about 500 W and 3,500 W, in particular between 1,500 W and 3,500 W.
  • Such nominal cooling power in combination with the proposed heat exchange media lead to excellent energy efficiency and drying efficiency.
  • the heat pump comprises an evaporator heat exchanger for transferring heat from the drying medium to the heat exchange medium
  • the appliance is adapted such that a nominal evaporator heat exchanger inlet temperature of the drying medium is about 30° C at the least.
  • the mentioned heat exchanger inlet temperatures are particularly advantageous for household appliances adapted to dry objects, such as laundry, in particular with respect to energy efficiency.
  • the heat pump comprises a liquefier heat exchanger for transferring heat from the heat exchange medium to the drying medium
  • the appliance is adapted such that a nominal liquefier heat exchanger outlet temperature of the drying medium is about 100°C at the most.
  • the mentioned heat exchanger outlet temperatures are particularly advantageous for household appliances adapted to dry objects, such as laundry, in particular with respect to energy efficiency.
  • the heat pump dryer 1 comprises a drying chamber 2, preferably a rotatable drum.
  • the drying drum 2 accommodates wet laundry 3 to be dried.
  • a drying medium 4 such as air, in particular comprising ambient air, is circulated through the drying drum 2 via a drying medium circuit, which, preferably forms a closed-loop circuit.
  • the drying medium 4 heated to a temperature of 100°C at the most and thereby having a comparatively low relative humidity is fed into the drying drum 2 and impinges the wet laundry 3.
  • humidity of the wet laundry 3 is absorbed by the drying medium 4 thereby drying the laundry 3.
  • the drying medium 4 also cools down, for example to temperatures of about 30°C.
  • the drying medium 4 After having passed the drying drum 2, the drying medium 4, having a comparatively high relative humidity, exits the drying drum 2 and is further cooled down to condense excess humidity therefrom. After that, the drying medium 4 is recirculated through the drying drum 2. But before re-entering the drying drum 2, the drying medium 4 is heated up again, thereby reducing its relative humidity.
  • the heat pump tumble dryer 1 comprises a heat pump unit 5.
  • the heat pump unit 5 exemplarily comprises a heat exchange medium evaporator 6 and a heat exchange medium liquefier 7. Note that in the following, the term "refrigerant" is also used as a synonym of the term "heat exchange medium”.
  • the heat pump unit 5 further comprises a compressor 8 interconnected between the refrigerant evaporator 6 and refrigerant liquefier 7.
  • a refrigerant evaporator outlet 9 is connected to a compressor inlet 10 and a compressor outlet 11 is connected to a refrigerant liquefier inlet 12.
  • a refrigerant liquefier outlet 13 is connected via a throttling element 14, a capillary for example, to a refrigerant evaporator inlet 15.
  • heat pump unit 5 heat is transferred from the refrigerant evaporator 6 to the refrigerant liquefier 7.
  • a refrigerant i. e. a heat exchange medium
  • circulated in the heat pump unit closed circuit is heated up at the refrigerant evaporator 6 and cooled down at the refrigerant liquefier 7.
  • the relatively low temperature at the refrigerant evaporator 6 is used to cool down the drying medium 4 to condensate humidity, i. e. to dehumidify the drying medium 4 exiting the drying drum 2.
  • the elevated temperature at the refrigerant liquefier 7 is used to reheat the drying medium 4 which in turn is then fed to the drying drum 2 for drying the laundry 3.
  • the heat pump unit 5 may further comprise auxiliary heat exchangers for further optimizing energy efficiency.
  • auxiliary refrigerant evaporator and an auxiliary refrigerant liquefier may be provided.
  • the number of auxiliary refrigerant heat exchangers can be varied from one to nearly any arbitrary number.
  • An auxiliary refrigerant evaporator may be used to speed up the heat-up phase of the heat pump dryer and a refrigerant liquefier may be used to balance the excess of energy of the heat pump dryer.
  • the heat pump tumble dryer 1 may comprise a fan 16 adapted and designed for circulating the drying medium 4 within the heat pump tumble dryer circuit.
  • hydro-fluoro-olefine comprising a tetra-fluoro-propene, in particular 1,1,1,2-tetra-fluoro-propene and/or 1,1,1,3-tetra-fluoro-propene, is well suited for use with heat exchange processes of heat pump tumble dryers 1.
  • the heat exchange medium has at least one of the following properties:
  • the heat pump tumble dryer 1 can be operated in an energy efficient way, in particular in concert with a heat exchange medium as described beforehand, if at least one of
  • the proposed household appliance adapted to dry objects, in particular laundry 3 has excellent energy efficiency and environmental compatibility.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (12)

  1. Haushaltsgerät (1) zum Trocknen von Gegenständen, insbesondere Wäsche (3), das eine Trockenkammer (2) zur Aufnahme der Gegenstände (3) und einen ersten Kreislauf zum zirkulierenden Beaufschlagen der Trockenkammer (2) mit einem Trocknungsmedium (4) und ferner eine Wärmepumpe (5) mit einem zweiten Kreislauf zur Zirkulation eines Wärmeaustauschmediums umfasst, wobei der erste und der zweite Kreislauf auf wärmeaustauschende Weise gekoppelt sind und wobei das Wärmeaustauschmedium vom Hydrofluoroolefin-Typ ist.
  2. Haushaltsgerät (1) gemäß Anspruch 1, wobei das Hydrofluoroolefin ein Tetrafluoropropen umfasst, insbesondere 1,1,1,2-Tetrafluoropropen und/oder 1,1,1,3-Tetrafluoropropen.
  3. Haushaltsgerät (1) gemäß Anspruch 1 oder 2, wobei eine kritische Temperatur des Wärmeaustauschmediums in einem Bereich von 90 °C bis 115 °C liegt.
  4. Haushaltsgerät (1) gemäß wenigstens einem der Ansprüche 1 bis 3, wobei ein kritischer Druck des Wärmeaustauschmediums in einem Bereich von 25-40 Bar liegt, vorzugsweise von 30-35 Bar, insbesondere von 33-34 Bar.
  5. Haushaltsgerät (1) gemäß wenigstens einem der Ansprüche 1 bis 4, wobei die Nennwärme der Verdampfung am Siedepunkt des Wärmeaustauschmediums in einem Bereich von 160-215 kJ/kg liegt, vorzugsweise von 175 bis 200 kJ/kg.
  6. Haushaltsgerät (1) gemäß wenigstens einem der Ansprüche 1 bis 5, wobei der Erderwärmungspotenzialindex des Wärmeaustauschmediums in einem Bereich von 1-15, vorzugsweise von 2-8 und insbesondere bevorzugt von 4-6 liegt.
  7. Haushaltsgerät (1) gemäß wenigstens einem der Ansprüche 1 bis 6, wobei das Wärmeaustauschmedium wenigstens eine aus einer unteren Brennbarkeitsstufe von etwa 6,2 Vol% und einer oberen Brennbarkeitsstufe von etwa 12,3 Vol% aufweist.
  8. Haushaltsgerät (1) gemäß wenigstens einem der Ansprüche 1 bis 7, wobei das Wärmeaustauschmedium wenigstens eines aus eine Mindestzündenergie von mehr als 3000 mJ und einer Brandgeschwindigkeit von etwa 1,5 cm/s aufweist.
  9. Haushaltsgerät (1) gemäß wenigstens einem der Ansprüche 1 bis 8, wobei die Wärmepumpe (5) eine Nennkühlleistung zwischen etwa 500 W und 3500 W, insbesondere zwischen 1500 W und 3500 W aufweist.
  10. Haushaltsgerät (1) gemäß wenigstens einem der Ansprüche 1 bis 9, wobei die Wärmepumpe (5) einen Verdampfer-Wärmetauscher (6) zur Übertragung der Wärme vom Trocknungsmedium zum Wärmeaustauschmedium umfasst, wobei das Gerät (1) so ausgeführt ist, dass eine Einlass-Nenntemperatur des Trocknungsmediums (4) am Verdampfer-Wärmetauscher mindestens etwa 30°C beträgt.
  11. Haushaltsgerät (1) gemäß wenigstens einem der Ansprüche 1 bis 10, wobei die Wärmepumpe (5) einen Verflüssiger-Wärmetauscher (7) zur Übertragung der Wärme vom Wärmeaustauschmedium zum Trocknungsmedium (4) umfasst, wobei das Gerät (1) so ausgeführt ist, dass eine Auslass-Nenntemperatur des Trocknungsmediums am Verflüssiger-Wärmetauscher höchstens 100 °C beträgt.
  12. Haushaltsgerät (1) gemäß wenigstens einem der Ansprüche 1 bis 11, wobei der erste Kreislauf für das Trocknungsmedium einen geschlossenen Kreislauf bildet.
EP11151801.5A 2011-01-24 2011-01-24 Haushaltgerät zum Trocknen von Gegenständen Not-in-force EP2479337B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP11151801.5A EP2479337B1 (de) 2011-01-24 2011-01-24 Haushaltgerät zum Trocknen von Gegenständen
AU2012210733A AU2012210733A1 (en) 2011-01-24 2012-01-11 Household appliance for drying objects
RU2013138445/12A RU2013138445A (ru) 2011-01-24 2012-01-11 Бытовое устройство для сушки вещей
US13/981,038 US20140020257A1 (en) 2011-01-24 2012-01-11 Household Appliance For Drying Objects
CN2012800062187A CN103476983A (zh) 2011-01-24 2012-01-11 用于对物品进行干燥的家用器具
PCT/EP2012/050385 WO2012100986A1 (en) 2011-01-24 2012-01-11 Household appliance for drying objects
BR112013018851A BR112013018851A2 (pt) 2011-01-24 2012-01-11 aparelho eletrodomético para secar objetos

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11151801.5A EP2479337B1 (de) 2011-01-24 2011-01-24 Haushaltgerät zum Trocknen von Gegenständen

Publications (2)

Publication Number Publication Date
EP2479337A1 EP2479337A1 (de) 2012-07-25
EP2479337B1 true EP2479337B1 (de) 2013-08-07

Family

ID=44318096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11151801.5A Not-in-force EP2479337B1 (de) 2011-01-24 2011-01-24 Haushaltgerät zum Trocknen von Gegenständen

Country Status (7)

Country Link
US (1) US20140020257A1 (de)
EP (1) EP2479337B1 (de)
CN (1) CN103476983A (de)
AU (1) AU2012210733A1 (de)
BR (1) BR112013018851A2 (de)
RU (1) RU2013138445A (de)
WO (1) WO2012100986A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11186943B2 (en) 2017-10-09 2021-11-30 Whirlpool Corporation Filter configured for being used in a machine for drying laundry and machine for drying laundry equipped with such a filter

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* Cited by examiner, † Cited by third party
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EP2479337B1 (de) * 2011-01-24 2013-08-07 Electrolux Home Products Corporation N.V. Haushaltgerät zum Trocknen von Gegenständen
EP3115500A1 (de) * 2015-07-10 2017-01-11 Electrolux Appliances Aktiebolag Haushaltgerät zum trocknen von artikeln
CN114717825B (zh) * 2022-05-10 2024-03-12 木卫智能科技(深圳)有限公司 衣物处理设备的控制方法及衣物处理设备、存储介质

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11186943B2 (en) 2017-10-09 2021-11-30 Whirlpool Corporation Filter configured for being used in a machine for drying laundry and machine for drying laundry equipped with such a filter
US11761141B2 (en) 2017-10-09 2023-09-19 Whirlpool Corporation Filter configured for being used in a machine for drying laundry and machine for drying laundry equipped with such a filter

Also Published As

Publication number Publication date
WO2012100986A1 (en) 2012-08-02
RU2013138445A (ru) 2015-02-27
US20140020257A1 (en) 2014-01-23
CN103476983A (zh) 2013-12-25
EP2479337A1 (de) 2012-07-25
BR112013018851A2 (pt) 2016-10-04
AU2012210733A1 (en) 2013-05-02

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