EP2341180A1 - Wärmepumpensystem für Wäschetrockner - Google Patents

Wärmepumpensystem für Wäschetrockner Download PDF

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Publication number
EP2341180A1
EP2341180A1 EP09180848A EP09180848A EP2341180A1 EP 2341180 A1 EP2341180 A1 EP 2341180A1 EP 09180848 A EP09180848 A EP 09180848A EP 09180848 A EP09180848 A EP 09180848A EP 2341180 A1 EP2341180 A1 EP 2341180A1
Authority
EP
European Patent Office
Prior art keywords
condensed water
pump system
heat exchanger
circuit
heat pump
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Withdrawn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
EP09180848A
Other languages
English (en)
French (fr)
Inventor
Alberto Bison
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
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP09180848A priority Critical patent/EP2341180A1/de
Priority to PCT/EP2010/070744 priority patent/WO2011080244A2/en
Publication of EP2341180A1 publication Critical patent/EP2341180A1/de
Withdrawn legal-status Critical Current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
    • D06F58/20—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 
    • D06F58/24—Condensing arrangements

Definitions

  • the present invention relates to a heat pump system for a tumble dryer according to the preamble of claim 1.
  • a typical tumble dryer comprises a closed air stream circuit and a closed refrigerant circuit.
  • the air stream circuit and the refrigerant circuit are coupled by at least two heat exchangers.
  • hot dry air is blown into the drum containing wet laundry.
  • warm humid air leaves the drum and is cooled down in an evaporator.
  • the evaporator is one of the heat exchangers.
  • the water vapour of the humid air is condensed and deposited, while a refrigerant in the refrigerant circuit evaporates and is heated up in the evaporator.
  • the humid air is dehumidified by the condensation of the water vapour.
  • the refrigerant In the refrigerant circuit the refrigerant is compressed and heated by a compressor. Then the refrigerant condenses and is cooled down in the condenser, in which the air stream is heated up. Between the condenser and the evaporator the refrigerant passes an expansion valve, in which said refrigerant is cooled down. In the evaporator the refrigerant is heated up and the air stream is cooled down, wherein the water vapour of the air stream condenses. Then the refrigerant is compressed and heated again by the compressor.
  • DE 44 09 607 C2 discloses a tumble dryer with a heat pump system.
  • the heat pump system comprises an air stream circuit and a refrigerant circuit.
  • the condensed water is used for cooling down the compressor of the refrigerant circuit or a portion of said refrigerant circuit.
  • the object of the present invention is achieved by the tumble dryer according to claim 1.
  • the heat pump system comprises a closed condensed water circuit for the condensed water with a further heat exchanger, wherein the refrigerant circuit and the condensed water circuit are thermally coupled by said further heat exchanger.
  • the main idea of the present invention is the closed condensed water circuit, which allows a recirculation of the condensed water.
  • the refrigerant is additionally cooled down due to the heat exchange with the condensed water.
  • the condensed water can be cooled down due to a heat exchange with the environment.
  • the first heat exchanger is a condenser provided for heating up the air stream and cooling down the refrigerant.
  • the second heat exchanger is an evaporator provided for cooling down the air stream and heating up the refrigerant.
  • the collecting sump is provided for collecting the condensed water from the evaporator.
  • the further heat exchanger is arranged between the condenser and the expansion valve in the refrigerant circuit.
  • the further heat exchanger may act as an auxiliary condenser.
  • the further heat exchanger comprises a serpentine pipe for the refrigerant, wherein said serpentine pipe is immerged in a space provided for the condensed water. This allows an efficient heat exchange between the refrigerant and the condensed water by simple means.
  • the condensed water circuit includes a water pump for pumping up the condensed water.
  • the condensed water circuit may include a collecting tank for storing the condensed water.
  • the collecting tank is arranged in a top portion of the heat pump system, so that the condensed water can flow to the collecting sump by gravity.
  • the further heat exchanger may be arranged between the water pump and the collecting tank in the condensed water circuit.
  • the condensed water circuit may include an additional heat exchanger arranged between the evaporator and the compressor in the refrigerant circuit.
  • the additional heat exchanger is arranged between the collecting tank and the collecting sump in the condensed water circuit.
  • the condensed water circuit may comprise at least one fan arranged besides a pipe portion between the collecting tank and the collecting sump.
  • the present invention relates to a method for controlling the heat energy exchange between the refrigerant circuit and the condensed water circuit in the heat pump system, wherein said method comprises the steps of:
  • This method allows an efficient use of heating and cooling energy resources.
  • FIG 1 illustrates a schematic diagram of a heat pump system for a tumble dryer according to a first embodiment of the present invention.
  • the heat pump system comprises an air stream circuit 10, a refrigerant circuit 12 and a condensed water circuit 22.
  • the air stream circuit 10 includes a drum, a fan for generating an air stream, a condenser 18 and an evaporator 20.
  • the drum and the fan which are not shown in FIG 1 , are integrated within the air stream circuit 10.
  • the drum is provided for receiving laundry to be dried.
  • the fan is provided for generating the air stream within the air stream circuit 10.
  • the air stream circuit 10 forms a closed loop. In FIG 1 only a portion of the air stream circuit 10 is shown and represented by dashed lines.
  • the condenser 18 and the evaporator 20 are heat exchangers.
  • the condenser 18 is provided for heating up the air stream in the air stream circuit 10.
  • the evaporator 20 is provided for cooling down the air stream in the air stream circuit 10 for condensing the water vapour in said air stream.
  • the refrigerant circuit 12 includes a compressor 14, the condenser 18, a further heat exchanger 26, an expansion valve 16 and the evaporator 20.
  • the refrigerant circuit 12 forms also a closed loop.
  • the air stream circuit 10 and the refrigerant circuit 12 are thermally coupled by the condenser 18 and the evaporator 20.
  • a refrigerant flows in the refrigerant circuit 12.
  • the refrigerant flows counter-clockwise in the refrigerant circuit 12.
  • the refrigerant is compressed and heated by the compressor 14.
  • the heated refrigerant reaches the condenser 18.
  • the condenser 18 the refrigerant condenses and is cooled down and the air stream in the air stream circuit 10 is heated up.
  • the refrigerant is additionally cooled down by condensed water.
  • the refrigerant is expanded and cooled down by the expansion valve 16.
  • the evaporator 20 the refrigerant is heated up and the air stream is cooled down.
  • the compressor 14 the refrigerant is compressed and heated up again.
  • the condensed water circuit 22 includes a collecting sump 24, a water pump 28, the further heat exchanger 26 and a collecting tank 30.
  • the collecting sump 24 is arranged at the lowest point of the condensed water circuit 22, while the collecting tank 30 is arranged at the highest point of the condensed water circuit 22.
  • the collecting sump 24 is connected to the evaporator 20 and provided for collecting the condensed water from the evaporator 20.
  • the condensed water is pumped up from the collecting sump 24 through the further heat exchanger 26 to the collecting tank 30.
  • the condensed water can flow down from the collecting tank 30 to the collecting sump 24 again.
  • the condensed water allows the additional cooling down of the refrigerant in the further heat exchanger 26.
  • the condensed water is permanently cooled down in the condensed water circuit 22 due to a heat exchange with the environment, while the condensed water flows along said condensed water circuit 22.
  • the condensed water circuit 22 is made of a material with a good thermal conductivity.
  • portions of the condensed water circuit 22 may be arranged at or beside the wall of the cabinet of the tumble drier, in order to allow a good heat exchange with the environment.
  • the heat exchange between the refrigerant and the condensed water in the further heat exchanger 26 allows an effective additional cooling down of the refrigerant.
  • the further heat exchanger 26 may be considered as an auxiliary condenser.
  • the further heat exchanger 26 may be realized as a continuation of an outlet pipe of the condenser 18.
  • the pipe has a serpentine structure.
  • the serpentine pipe can be immerged in a collecting space under the evaporator, where the condensed water falls down.
  • the condensed water can be kept in this space until the desired energy has been exchanged. Then the condensed water can be recirculated by the water pump 28.
  • the exchanged heat can be controlled by the measuring the temperature difference of the refrigerant between the inlet and the outlet of the further heat exchanger 26. Further, the temperature difference of the water and the time development of the temperature differences (of water, of refrigerant or a combination thereof) may be taken into account.
  • the condensed water is kept in the collecting sump 24 during the temperature difference exceeds a predetermined value. If the temperature difference decreases, then the temperature of the condensed water is becoming too high, so that the condensed water has to be recirculated.
  • the collecting tank 30 is removable, so that the user can easily empty the collecting tank 30.
  • the condensed water reaches a predetermined fill level within the collecting tank 30, then condensed water flows down to the collecting sump 24.
  • FIG 2 illustrates a schematic diagram of the heat pump system for the tumble dryer according to a second embodiment of the present invention.
  • the heat pump system according to the second embodiment comprises the same components as the heat pump system of the first embodiment.
  • the heat pump system of the second embodiment comprises an additional heat exchanger 32.
  • the additional heat exchanger 32 is a part of the refrigerant circuit 12 as well as of the condensed water circuit 22.
  • the refrigerant circuit 12 and the condensed water circuit 22 are thermally coupled by the additional heat exchanger 32.
  • the additional heat exchanger 32 is arranged between the evaporator 20 and the compressor 14.
  • the additional heat exchanger 32 allows the refrigerant to be overheated by the condensed water, so that only gas enters into the compressor 14. This improves the performances of the heat pump system on the one hand and the additional heat exchanger 32 allows the water to be cooled down on the other hand.
  • the additional heat exchanger 32 is arranged between the collecting tank 30 and the collecting sump 24.
  • FIG 3 illustrates a schematic diagram of the heat pump system for the tumble dryer according to a third embodiment of the present invention.
  • the heat pump system according to the third embodiment comprises the same components as the heat pump system of the first embodiment.
  • the heat pump system of the third embodiment comprises a fan 34.
  • the fan 34 is arranged besides a pipe connecting the collecting tank 30 to the collecting sump 24.
  • the fan 34 supports the heat exchange between the refrigerant and the environment, so that the cooling down of the refrigerant is improved.
  • FIG 4 illustrates a schematic diagram of a portion of a condensed water circuit for the heat pump system according to a fourth embodiment of the present invention.
  • the condensed water circuit 22 includes a water stream sensor 36 and a three-way valve 38.
  • the water stream sensor 36 is arranged in a down-stream pipe 40 between the collecting tank 30 and the collecting sump 24.
  • the three-way valve 38 is arranged in an up-stream pipe 42 to the collecting tank 30.
  • a pipe connection 44 is arranged between the down-stream pipe 40 and the three-way valve 38.
  • the collecting tank 30 is removable and arranged in a tank housing 50.
  • the amount of the condensed water increases during the drying process.
  • the water stream sensor 36 detects a water overflow, when the collecting tank 30 is completely filled and the condensed water flows into the tank housing 50. Then, the tumble dryer is stopped in order to inform the user that the collecting tank needs to be emptied.
  • the three-way valve 38 is provided for a selection between two operation modes.
  • the connection to the collecting tank 30 is closed and the pipe connection 44 is opened, so that the condensed water is recirculated.
  • the connection to the collecting tank 30 is opened and the pipe connection 44 is closed.
  • the second operation mode may be activated at a predetermined time interval, since the amount of the condensed water increases during the drying process.
  • FIG 5 illustrates a schematic diagram of a portion of the condensed water circuit for the heat pump system according to a fifth embodiment of the present invention.
  • the condensed water circuit 22 includes the water stream sensor 36, a recirculation pipe 46 and a recirculation valve 48.
  • the water stream sensor 36 is arranged in the down-stream pipe 40 between the collecting tank 30 and the collecting sump 24.
  • the recirculation pipe 46 extends from the down-stream pipe 40 to the collecting tank 30.
  • the recirculation valve 48 is arranged in the recirculation pipe 46 and is provided for closing said recirculation pipe 46.
  • the collecting tank 30 is removable.
  • the recirculation valve 48 is fluidly connected to the bottom part of the collecting tank 30, so that immediately the water is recirculated via the down-stream pipe 40.
  • the condensed water is pumped up to the collecting tank 30.
  • the recirculation valve 48 is activated, so that the condensed water returns to the collecting sump 24 by gravity.
  • the amount of the condensed water increases during the drying process and the collecting tank 30 will be filled.
  • the collecting tank 30 is completely filled, then the condensed water overflows into the tank housing 50.
  • the water accumulated overflows from the collecting tank 30 into the tank housing 50 then the water passes the stream sensor 36 and the tumble dryer is stopped in order to inform the user that the collecting tank needs to be emptied.
  • FIG 6 illustrates a perspective view of a realisation of the heat pump system for the tumble dryer according to the present invention.
  • FIG 6 shows the arrangement of the components of the heat pump system within the tumble dryer.
  • the collecting tank 30 is arranged in a top portion of the tumble dryer, while the remaining components of the heat pump system are arranged in a bottom portion of the tumble dryer.
  • the collecting tank 30 is removable within the tank housing 50.
  • the collecting tank 30 is connected to the bottom portion of the tumble dryer by the down-stream pipe 40 and the up-stream pipe 42.
  • the heat pump system according to the present invention allows in washer dryer a reduction of the temperature of the refrigerant of about 3°C.
  • the power of the evaporator may increase of about 50 W.
  • a tumble dryer a reduction of the temperature of the refrigerant of about 6°C can be achieved. This allows a power increase of about 100 W.
  • the heat pump system according to the present invention can be realized as a compact arrangement.
  • the inventive heat pump system avoids complicated paths for the pipes outside of the air ducts.
  • the amount of additional material for the closed condensed water circuit, e.g. copper pipes, is very small.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
EP09180848A 2009-12-29 2009-12-29 Wärmepumpensystem für Wäschetrockner Withdrawn EP2341180A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09180848A EP2341180A1 (de) 2009-12-29 2009-12-29 Wärmepumpensystem für Wäschetrockner
PCT/EP2010/070744 WO2011080244A2 (en) 2009-12-29 2010-12-27 A heat pump system for a tumble dryer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09180848A EP2341180A1 (de) 2009-12-29 2009-12-29 Wärmepumpensystem für Wäschetrockner

Publications (1)

Publication Number Publication Date
EP2341180A1 true EP2341180A1 (de) 2011-07-06

Family

ID=42201046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09180848A Withdrawn EP2341180A1 (de) 2009-12-29 2009-12-29 Wärmepumpensystem für Wäschetrockner

Country Status (2)

Country Link
EP (1) EP2341180A1 (de)
WO (1) WO2011080244A2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2644768A1 (de) * 2012-03-30 2013-10-02 BSH Electrodomésticos España, S.A. Wärmepumpe für Vorrichtung zur Wäschebehandlung
WO2013144780A1 (en) * 2012-03-30 2013-10-03 BSH Bosch und Siemens Hausgeräte GmbH Heat pump for a clothes treatment appliance, and clothes treatment appliance comprising such heat pump
EP2650425A1 (de) * 2012-04-12 2013-10-16 Electrolux Home Products Corporation N.V. Wäschetrocknermaschine
CN105986446A (zh) * 2015-01-30 2016-10-05 杭州三花研究院有限公司 烘干系统及其使用方法
WO2019192782A1 (en) * 2018-04-02 2019-10-10 Arcelik Anonim Sirketi A laundry dryer with heat pump
EP4050147A3 (de) * 2021-02-25 2022-11-23 Miele & Cie. KG Wärmepumpentrocknungsgerät und verfahren zum betreiben eines wärmepumpentrocknungsgerätes
EP4050151A3 (de) * 2021-02-25 2022-11-23 Miele & Cie. KG Wärmepumpentrocknungsgerät und verfahren zum betreiben eines wärmepumpentrocknungsgerätes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014225806A1 (de) 2014-12-15 2016-06-16 BSH Hausgeräte GmbH Haushaltsgerät zum Trocknen von Wäsche

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Publication number Priority date Publication date Assignee Title
DE3321245A1 (de) * 1983-06-11 1984-12-13 Wilh. Cordes GmbH & Co Maschinenfabrik, 4740 Oelde Waeschetrockner mit einem evakuierbaren waeschebehaelter
DE4409607A1 (de) * 1993-04-21 1994-10-27 Miele & Cie Kondensationswäschetrockner mit einer Wärmepumpe
DE202006018205U1 (de) * 2006-11-06 2007-02-15 V-Zug Ag Wäschetrockner mit Zusatzwärmetauscher
DE102007049060A1 (de) * 2007-10-12 2009-04-16 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Spülflüssigkeitseinrichtung in einem Hausgerät zur Pflege von Wäschestücken und Spülflüssigkeitseinrichtung

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JP2002188999A (ja) 2000-12-21 2002-07-05 Hitachi Ltd 異物・欠陥検出装置及び検出方法
JP4386709B2 (ja) 2003-11-14 2009-12-16 関西電力株式会社 レーザ超音波による材料非破壊検査方法及び装置
JP4631002B2 (ja) 2006-06-29 2011-02-16 独立行政法人産業技術総合研究所 欠陥を検出する方法及びそのための装置
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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3321245A1 (de) * 1983-06-11 1984-12-13 Wilh. Cordes GmbH & Co Maschinenfabrik, 4740 Oelde Waeschetrockner mit einem evakuierbaren waeschebehaelter
DE4409607A1 (de) * 1993-04-21 1994-10-27 Miele & Cie Kondensationswäschetrockner mit einer Wärmepumpe
DE4409607C2 (de) 1993-04-21 2002-03-14 Miele & Cie Kondensationswäschetrockner mit einer Wärmepumpe
DE202006018205U1 (de) * 2006-11-06 2007-02-15 V-Zug Ag Wäschetrockner mit Zusatzwärmetauscher
DE102007049060A1 (de) * 2007-10-12 2009-04-16 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Spülflüssigkeitseinrichtung in einem Hausgerät zur Pflege von Wäschestücken und Spülflüssigkeitseinrichtung

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2644768A1 (de) * 2012-03-30 2013-10-02 BSH Electrodomésticos España, S.A. Wärmepumpe für Vorrichtung zur Wäschebehandlung
WO2013144780A1 (en) * 2012-03-30 2013-10-03 BSH Bosch und Siemens Hausgeräte GmbH Heat pump for a clothes treatment appliance, and clothes treatment appliance comprising such heat pump
CN104204335A (zh) * 2012-03-30 2014-12-10 Bsh博世和西门子家用电器有限公司 用于衣物处理器具的热泵和包括这种热泵的衣物处理器具
CN104204335B (zh) * 2012-03-30 2016-10-26 Bsh家用电器有限公司 用于衣物处理器具的热泵和包括这种热泵的衣物处理器具
EP2650425A1 (de) * 2012-04-12 2013-10-16 Electrolux Home Products Corporation N.V. Wäschetrocknermaschine
WO2013153080A1 (en) * 2012-04-12 2013-10-17 Electrolux Home Products Corporation N.V. Laundry drying machine
CN105986446A (zh) * 2015-01-30 2016-10-05 杭州三花研究院有限公司 烘干系统及其使用方法
CN105986446B (zh) * 2015-01-30 2019-11-01 杭州三花研究院有限公司 烘干系统及其使用方法
WO2019192782A1 (en) * 2018-04-02 2019-10-10 Arcelik Anonim Sirketi A laundry dryer with heat pump
EP4050147A3 (de) * 2021-02-25 2022-11-23 Miele & Cie. KG Wärmepumpentrocknungsgerät und verfahren zum betreiben eines wärmepumpentrocknungsgerätes
EP4050151A3 (de) * 2021-02-25 2022-11-23 Miele & Cie. KG Wärmepumpentrocknungsgerät und verfahren zum betreiben eines wärmepumpentrocknungsgerätes

Also Published As

Publication number Publication date
WO2011080244A3 (en) 2011-09-01
WO2011080244A2 (en) 2011-07-07

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