EP2576889B1 - Energiesparende thermoelektrischer wärmepumpenwäschetrockner - Google Patents

Energiesparende thermoelektrischer wärmepumpenwäschetrockner Download PDF

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Publication number
EP2576889B1
EP2576889B1 EP11720308.3A EP11720308A EP2576889B1 EP 2576889 B1 EP2576889 B1 EP 2576889B1 EP 11720308 A EP11720308 A EP 11720308A EP 2576889 B1 EP2576889 B1 EP 2576889B1
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EP
European Patent Office
Prior art keywords
cooling
condenser
air
drying
laundry dryer
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
EP11720308.3A
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English (en)
French (fr)
Other versions
EP2576889A2 (de
Inventor
Yavuz Sahin
Serdar Kocaturk
Mehmet Kaya
Onur Hartoka
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.)
Arcelik AS
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Arcelik AS
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Publication date
Application filed by Arcelik AS filed Critical Arcelik AS
Publication of EP2576889A2 publication Critical patent/EP2576889A2/de
Application granted granted Critical
Publication of EP2576889B1 publication Critical patent/EP2576889B1/de
Not-in-force 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 
    • D06F58/206—Heat pump arrangements

Definitions

  • the present invention relates to a laundry dryer which comprises a thermoelectric heat pump and wherein energy is saved by increasing the effectiveness of the thermoelectric heat pump.
  • thermoelectric heat pumps also called Peltier elements
  • the thermoelectric heat pumps have hot and cold sides, and performs both the functions of condensing by cooling and also of heating the drying air. While the hot side of the thermoelectric heat pumps used in laundry dryers supports the heater, the cold side supports the condenser.
  • the drying air In the process of drying the laundry, the drying air is cooled by some amount while being passed over the condenser, afterwards is passed over the thermoelectric heat pump and thereby dehumidification process of the drying air is realized in two steps. Similarly, the heating process is also realized in two steps.
  • the drying air which is almost completely dehumidified of the moisture contained therein by passing through the condenser and the thermoelectric heat pump is heated some amount by being passed over the hot side of the thermoelectric heat pump and afterwards the heating process is completed by the drying air being passed over the heater.
  • the cooling load of the condenser and the thermoelectric heat pump should be balanced for an efficient drying process in laundry dryers wherein the heater, the condenser and the thermoelectric heat pumps are used together.
  • the cooling load that is the amount of air that needs to be cooled and condensed
  • the duration of the drying process is prolonged and energy consumption increases.
  • the cooling load becomes unbalanced to the disadvantage of the thermoelectric heat pump
  • a greater amount of the cooling load is compensated by the condenser and the cooling load of the thermoelectric heat pump decreases. Decrease in the cooling load of the thermoelectric heat pump results in the reduction of heating effectiveness and efficiency.
  • a process air fan is used for circulation of the process air and a cooling fan is used for cooling the condenser. Both of the fans are rotated by a single motor. In a portion of the drying cycle duration, cooling fan is rotated in the reverse direction to decrease the volumetric flow of air delivered unto the condenser.
  • the aim of the present invention is the realization of a laundry dryer which comprises a thermoelectric heat pump and wherein energy is saved by increasing the effectiveness of the thermoelectric heat pump.
  • thermoelectric (Peltier) heat pump having a hot side and a cold side
  • the process air activated by the process air fan continues its path in the drying duct after leaving the drum passing from respectively the condenser, the cold side, the hot side and the heater and is delivered again to the drum in dehumidified and heated state.
  • the air delivered to the condenser by being sucked from the outer environment is prevented or restricted by means of a valve placed in the cooling duct without the need to change the speed and operating direction of the motor rotating the cooling fan.
  • the function of cooling the process air is predominantly transferred to the thermoelectric heat pump by decreasing the effectiveness of the condenser.
  • the valve stops the cooling air flow to the condenser by completely closing the cooling duct in the heating phase at the start of the drying process and/or in the last drying phase at the end of the drying process.
  • an opening having a narrower surface area than the cooling duct is arranged on the valve.
  • an adjustment mechanism is disposed in the valve or the cooling duct that provides changing of the area of the opening.
  • valve is disposed between the cooling fan and the condenser.
  • the valve is disposed at the cooling air inlet through which the cooling duct opens to the outside.
  • the cooling air delivered to the condenser is entirely cut off or the volumetric flow of the air is lowered by means of the valve, thereby effectiveness of the condenser is decreased, a large portion of condensation load of the condenser is transferred to the thermoelectric heat pump and energy is saved by increasing the efficiency of the thermoelectric heat pump.
  • the laundry dryer (1) comprises a body, a drum (2) wherein the laundry is placed, a drying duct (3) wherein the process air is circulated, a heater (4) that heats the process air, a condenser (5) that condenses the process air, a process air fan (6) that circulates the process air in the drying duct (3), a cooling fan (7) that cools the condenser (5), a motor (8) that drives the drum (2), the process air fan (6) and the cooling fan (7) together, a cooling duct (9) that directs the air sucked from the outer environment by the cooling fan (7) onto the condenser (5) and a thermoelectric heat pump (12) disposed in the drying duct (3), having a cold side (10) that condenses the process air passing thereover by cooling and a hot side (11) that heats the process air passing thereover.
  • the process air activated by the process air fan (6) continues its path in the drying duct (3) after leaving the drum (2) by passing through the condenser (5), the thermoelectric heat pump (12) and the heater (4) to be delivered again to the drum (2) in dehumidified and heated state.
  • the condenser (5) is cooled with the air sucked by the cooling fan (7) from the outer environment and delivered by the cooling duct (9) and condenses the process air passing therethrough.
  • the drying process is accomplished in three stages in the laundry dryer (1).
  • the first stage of the drying process is named as the heating phase, in this phase the heater (4) is operated with a high runtime and the foremost aim is to heat the laundry dryer (1).
  • the second stage of the drying process is named as the steady state or the drying phase and the heater (4) is operated in the drying process with a runtime that is predetermined for the steady state.
  • the third stage of the drying process is named as the last drying phase. In this stage, the moisture contained in the process air is decreased substantially since the drying process is nearing the end, the runtime of the heater (4) is slowly decreased and the heater (4) is entirely turned off at the end of the predetermined time.
  • the laundry dryer (1) of the present invention comprises a valve (13) disposed in the cooling duct (9) which prevents or restricts flow of the air delivered to the condenser (5) by closing the cooling duct (9) in the heating phase at the start of the drying process and/or in the last drying phase at the end of the drying process, without changing the speed and operating direction of the motor (8) rotating the cooling fan (7).
  • the heater (4) and the thermoelectric heat pump (12) heat the process air by drawing a great amount of energy.
  • Changing the condenser (5) to the passive position or decreasing its effectiveness in the heating phase until the temperature of the process air reaches the drying phase (steady state) value increases the efficiency of the drying process and decreases energy consumption.
  • the valve (13) is closed in the heating phase at the start of the drying process, thereby preventing or restricting delivery of air from the cooling fan (7) to the condenser (5). Since effectiveness of the condenser (5) is decreased, the process air passes through the condenser (5) without being cooled and reaches the cold side (10) of the thermoelectric heat pump (12).
  • thermoelectric heat pump (12) The cooling load of the thermoelectric heat pump (12) is increased by delivering the process air to the thermoelectric heat pump (12) in uncooled state, thereby the effectiveness of the hot side (11) is also increased in accordance with the operating principle of the thermoelectric heat pump (12) and the hot side (11) emits more heat to the process air.
  • the valve (13) is opened, allowing air flow from the cooling duct (9) to the condenser (5) and thus the condenser (5) is provided to accomplish its condensation function effectively.
  • the valve (13) is closed as in the heating phase at the start, preventing or restricting delivery of air from the cooling duct (9) to the condenser (5). Accordingly, the process air, even though the amount of humidity therein is decreased, passes from the condenser (5) without being condensed and reaches the cold side (10) of the thermoelectric heat pump (12) and the function of condensing the process air is transferred to the cold side (10). Thus, as in the heating phase at the start, more heat is emitted from the hot side (11) to the process air, the operating efficiency of the thermoelectric heat pump (12) increases and energy consumption decreases.
  • the valve (13) stops the cooling air flow to the condenser (5) by completely closing the cooling duct (9) in the heating phase at the start of the drying process and/or in the last drying phase at the end of the drying process.
  • the laundry dryer (1) comprises an opening (14) disposed on the valve (13), having a surface area narrower than the surface area of the cooling duct (9) in perpendicular direction to the air flow, that delivers cooling air flow to the condenser (5) by restricting but without entirely blocking in the heating phase at the start of the drying process and/or in the last drying phase at the end of the drying process ( Figure 2 ).
  • the condenser (5) is not changed entirely to the passive position in the heating phase and the last drying phase, the volumetric flow of the air flowing from the cooling duct (9) to the condenser (5) is decreased by means of the opening (14) and the effectiveness of the thermoelectric heat pump (12) is increased by decreasing effectiveness of the condenser (5).
  • the laundry dryer (1) comprises an adjustment mechanism (15) disposed in the valve (13) or the cooling duct (9), providing the surface area of the opening (14) perpendicular to the air flow direction to be changed ( Figure 3 ).
  • the adjustment mechanism (15) provides the volumetric flow of the air passing through the opening (14) to be adjusted in the closed position of the valve (13) by increasing, decreasing the surface dimension of the opening (14).
  • valve (13) is disposed inside the cooling duct (9) between the cooling fan (7) and the condenser (5).
  • the laundry dryer (1) comprises a cooling air inlet (16) through which the cooling duct (9) opens from the body to the outer environment and the valve (13) is disposed at the cooling air inlet (16).
  • the air delivered from the cooling duct (9) to the condenser (5) by the cooling fan (7) is entirely cut off or the volumetric flow of the air is lowered by means of the valve (13) in the heating phase at the start of the drying process and in the last drying phase at the end of the drying process.
  • the effectiveness of the condenser (5) is decreased, the function of condensing the process air by cooling it is transferred predominantly to the thermoelectric heat pump (12) and energy consumption is decreased by increasing the efficiency of the thermoelectric heat pump (12).
  • the drum (2), the process air fan (6) and the cooling fan (7) are rotated together by the motor (8), it is not necessary to stop or slow down the motor (8) for decreasing the effectiveness of the condenser (5).

Landscapes

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

Claims (6)

  1. Wäschetrockner (1), umfassend eine Trommel (2), in die die Wäsche gelegt wird, einen Trocknungskanal (3), in dem die Prozessluft zirkuliert, eine Heizeinrichtung (4), die die Prozessluft erwärmt, einen Kondensator (5), der die Prozessluft kondensiert, ein Prozessluftgebläse (6), das die Prozessluft im Trocknungskanal (3) zirkulieren lässt, ein Kühlungsgebläse (7), das den Kondensator (5) kühlt, einen Motor (8), der die Trommel (2), das Prozessluftgebläse (6) und das Kühlgebläse (7) gemeinsam antreibt, einen Kühlungskanal (9), der die Luft, die durch das Kühlungsgebläse (7) von außen angesaugt wird, auf den Kondensator (5) lenkt, und eine thermoelektrische Wärmepumpe (12), die im Trocknungskanal (3) angeordnet ist und eine kalte Seite (10), die durch Kühlen die Prozessluft kondensiert, welche darüber strömt, und eine warme Seite (11) aufweist, die die Prozessluft erwärmt, die darüber strömt, gekennzeichnet durch ein Ventil (13), das im Kühlkanal (9) angeordnet ist und den Luftstrom, der an den Kondensator (5) geleitet wird, verhindert oder einschränkt, indem es den Kühlungskanal (9) in der Erwärmungsphase zu Beginn des Trocknungsvorgangs und/oder in der letzten Trocknungsphase zum Ende des Trocknungsvorgangs schließt.
  2. Wäschetrockner (1) nach Anspruch 1, dadurch gekennzeichnet, dass das Ventil (13) den Kühlungsluftstrom an den Kondensator (5) unterbricht, indem es den Kühlungskanal (9) vollständig schließt.
  3. Wäschetrockner (1) nach Anspruch 1, gekennzeichnet durch eine Öffnung (14), die am Ventil (13) angeordnet ist und eine kleinere Fläche als der Kühlungskanal (9) aufweist und den Kühlungsluftstrom unter Einschränkung desselben an den Kondensator (5) lenkt.
  4. Wäschetrockner (1) nach einem der vorangehenden Ansprüche, gekennzeichnet durch einen Einstellmechanismus (15), der im Ventil (13) oder im Kühlungskanal (9) angeordnet ist und dafür sorgt, dass die Fläche der Öffnung (14) geändert wird.
  5. Wäschetrockner (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Ventil (13) zwischen dem Kühlungsgebläse (7) und dem Kondensator (5) angeordnet ist.
  6. Wäschetrockner (1) nach einem der Ansprüche 1 bis 4, gekennzeichnet durch einen Kühlungslufteinlass (16), durch den sich der Kühlungskanal (9) vom Gehäuse nach außen öffnet, wobei das Ventil (13) am Kühlungslufteinlass (16) angeordnet ist.
EP11720308.3A 2010-06-04 2011-05-20 Energiesparende thermoelektrischer wärmepumpenwäschetrockner Not-in-force EP2576889B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201004514 2010-06-04
PCT/EP2011/058277 WO2011151204A2 (en) 2010-06-04 2011-05-20 A thermoelectric heat pump laundry dryer wherein energy is saved

Publications (2)

Publication Number Publication Date
EP2576889A2 EP2576889A2 (de) 2013-04-10
EP2576889B1 true EP2576889B1 (de) 2014-04-30

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Family Applications (1)

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EP11720308.3A Not-in-force EP2576889B1 (de) 2010-06-04 2011-05-20 Energiesparende thermoelektrischer wärmepumpenwäschetrockner

Country Status (3)

Country Link
EP (1) EP2576889B1 (de)
CN (1) CN102906327B (de)
WO (1) WO2011151204A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9140396B2 (en) 2013-03-15 2015-09-22 Water-Gen Ltd. Dehumidification apparatus

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2994566A1 (de) * 2013-05-09 2016-03-16 Arçelik Anonim Sirketi Thermoelektrischer wärmepumpenwäschetrockner
EP3117166B1 (de) 2014-03-11 2020-04-08 Watergen Ltd Kondensationstrockner mit geschlossenem kreislauf und wärmerückführung
KR102364673B1 (ko) 2014-10-28 2022-02-18 엘지전자 주식회사 의류처리장치 및 그 제어방법
CN106884297B (zh) * 2015-12-16 2020-03-10 青岛海尔滚筒洗衣机有限公司 一种干衣设备及干衣方法
CN105937160A (zh) * 2016-05-31 2016-09-14 无锡小天鹅股份有限公司 干衣机或洗干一体机
US11851807B2 (en) * 2019-11-07 2023-12-26 Whirlpool Corporation Method of removing heat from a clothes tumbling system on the outside of the cabinet
DE102020102838A1 (de) 2020-02-05 2021-08-05 Miele & Cie. Kg Wäschetrockner
US20230092538A1 (en) * 2020-03-02 2023-03-23 Lg Electronics Inc. Clothing management apparatus

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Publication number Priority date Publication date Assignee Title
DE19959977A1 (de) * 1999-12-13 2001-06-21 Bsh Bosch Siemens Hausgeraete Haushaltkondenswäschetrockner und Verfahren zu seinem Betrieb
CN101158099B (zh) * 2006-10-08 2011-04-27 海尔集团公司 一种采用热泵作为热源的洗衣机干燥机
DE102006051505A1 (de) * 2006-10-31 2008-05-08 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben eines Hausgeräts zur Pflege von Wäschestücken
WO2009016173A1 (en) * 2007-08-02 2009-02-05 Arcelik Anonim Sirketi A washer/dryer
DE102008040853A1 (de) * 2008-07-30 2010-02-04 BSH Bosch und Siemens Hausgeräte GmbH Kondensationstrockner mit einer Wärmepumpe und Erkennung eines unzulässigen Betriebszustands sowie Verfahren zu seinem Betrieb
DE102008041019A1 (de) * 2008-08-06 2010-02-11 BSH Bosch und Siemens Hausgeräte GmbH Kondensationstrockner mit einer Wärmepumpe und Erkennung eines unzulässigen Betriebszustands sowie Verfahren zu seinem Betrieb

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9140396B2 (en) 2013-03-15 2015-09-22 Water-Gen Ltd. Dehumidification apparatus
US9976817B2 (en) 2013-03-15 2018-05-22 Water-Gen Ltd. Planar element for forming heat exchanger
US10006721B2 (en) 2013-03-15 2018-06-26 Water-Gen Ltd. Closed-cycle condenser dryer with heat regeneration

Also Published As

Publication number Publication date
WO2011151204A2 (en) 2011-12-08
CN102906327A (zh) 2013-01-30
EP2576889A2 (de) 2013-04-10
WO2011151204A3 (en) 2012-03-08
CN102906327B (zh) 2015-09-23

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