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EP2385169A1 - A laundry machine with heat pump system and a method for operating the laundry machine - Google Patents

A laundry machine with heat pump system and a method for operating the laundry machine Download PDF

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Publication number
EP2385169A1
EP2385169A1 EP10161726A EP10161726A EP2385169A1 EP 2385169 A1 EP2385169 A1 EP 2385169A1 EP 10161726 A EP10161726 A EP 10161726A EP 10161726 A EP10161726 A EP 10161726A EP 2385169 A1 EP2385169 A1 EP 2385169A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
air stream
circuit
condenser
evaporator
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Withdrawn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
EP10161726A
Other languages
German (de)
French (fr)
Inventor
Sergio Pillot
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 EP10161726A priority Critical patent/EP2385169A1/en
Publication of EP2385169A1 publication Critical patent/EP2385169A1/en
Withdrawn legal-status Critical Current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 
    • D06F58/206—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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/08—Control circuits or arrangements thereof

Definitions

  • the present invention relates to a laundry machine with heat pump system according to the preamble of claim 1. Further, the present invention relates to a method for operating the laundry machine according to the preamble of claim 13.
  • the heat pump technology is an efficient way to save energy in a laundry machine for example in tumble dryers, washer-dryers or washing machines.
  • the following description will refer particularly to a tumble dryer but the invention is clearly applicable to other household appliances.
  • the tumble dryer comprises an open or 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, e.g. an evaporator and a condenser.
  • 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 device, 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 up again by the compressor.
  • a capillary device e.g. an expansion valve or a throttling device.
  • the safe work of the compressor may not be impeded by the capillary tube design.
  • the necessary superheating at the outlet of the evaporator must be realized and maintained.
  • the efficiency is not optimum, because a portion of the evaporator is dedicated to overheat instead of dehumidify the air stream.
  • the object of the present invention is achieved by the heat pump system according to claim 1.
  • the heat pump system includes at least one additional heat exchanger between the refrigerant coming from an outlet of the condenser, the refrigerant coming from an outlet of the evaporator and air in a further air stream.
  • the core of the present invention is the exchange of heat between two different points of the refrigerant circuit on the one hand and between the further air stream and at least one of said points on the other hand.
  • the additional heat exchanger has a double function. A part of the additional heat exchanger act as an auxiliary condenser. Another part of the additional heat exchanger act as a regenerative heat exchanger.
  • the auxiliary condenser is provided for that refrigerant, which comes from the outlet of the condenser.
  • the regenerative heat exchanger is provided for that refrigerant, which comes from the outlet of the evaporator.
  • the auxiliary condenser keeps the superheating phase out of the evaporator.
  • the expansion device may be reduced, e.g. a shorter capillary tube can be used.
  • the present invention improves the heat pump performances.
  • the regenerative heat exchanger preserves the compressor from failure due to entering of liquids. The time for drying the laundry is reduced. The energy consumption is also reduced.
  • the additional heat exchanger comprises a first refrigerant channel interconnected between an outlet of the condenser and an inlet of the expansion device.
  • the first refrigerant channel within the further air stream works as the auxiliary condenser.
  • the additional heat exchanger may comprise a second refrigerant channel interconnected between an outlet of the evaporator and an inlet of the compressor.
  • the second refrigerant channel is thermally coupled to the first refrigerant channel so as to works as the regenerative heat exchanger.
  • the expansion device is or includes a capillary tube and/or an expansion valve.
  • the condenser comprises a serpentine pipe for the refrigerant, wherein said serpentine pipe is arranged within the air stream circuit.
  • the evaporator may comprise a serpentine pipe for the refrigerant, wherein said serpentine pipe is arranged within the air stream circuit.
  • the first refrigerant channel may comprise a serpentine pipe for the refrigerant, wherein said serpentine pipe is arranged within the further air stream.
  • the second refrigerant channel may comprise a serpentine pipe for the refrigerant, wherein said serpentine pipe is thermally coupled to the first refrigerant channel.
  • the further air stream is generated by at least one fan.
  • the present invention relates to a corresponding tumble dryer with the heat pump system as described above.
  • the object of the present invention is further achieved by the method for operating the heat pump system according to claim 13.
  • the main idea of the present invention is the exchange of heat between two different points of the refrigerant circuit and the air stream.
  • the additional heat exchanger acts as an auxiliary condenser as well as a regenerative heat exchanger.
  • the auxiliary condenser is provided for that refrigerant coming from the outlet of the condenser.
  • the regenerative heat exchanger is provided for that refrigerant coming from the outlet of the evaporator.
  • the auxiliary condenser keeps the superheating phase out of the evaporator.
  • the expansion device may be reduced, so that a shorter capillary tube can be used.
  • the present invention improves the heat pump performances.
  • the regenerative heat exchanger preserves the compressor from failure due to a liquid entering.
  • the time for drying the laundry is reduced, so that the energy consumption is also reduced.
  • the method is performed by the heat pump system and/or the tumble dryer as described above.
  • FIG 1 illustrates a schematic diagram of a heat pump system for a tumble dryer according to a preferred embodiment of the present invention.
  • the heat pump system comprises an air stream circuit 10 and a refrigerant circuit 12.
  • the air stream circuit 10 includes a drum, a condenser 18 and an evaporator 20.
  • the drum is not shown in FIG 1 .
  • the drum is integrated within the air stream circuit 10 and provided for receiving laundry to be dried. Additionally, the air stream circuit 10 may include a fan.
  • the air stream circuit 10 may be formed as a closed or an open loop. FIG 1 shows only a portion of the air stream circuit 10.
  • the condenser 18 and the evaporator 20 are air-fluid heat exchangers and form the interconnections between the air stream circuit 10 and the refrigerant circuit 12.
  • 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, an additional heat exchanger 22, an expansion device 16 and the evaporator 20.
  • the refrigerant circuit 12 forms a closed loop.
  • the air stream circuit 10 and the refrigerant circuit 12 are thermally coupled by the condenser 18 and the evaporator 20.
  • the additional heat exchanger 22 is also an air-fluid heat exchanger.
  • a refrigerant flows in the refrigerant circuit 12.
  • the refrigerant is compressed and heated by the compressor 14. Then, the heated refrigerant reaches the condenser 18.
  • the condenser 18 the refrigerant condenses and is cooled down. At the same time, the air stream in the air stream circuit 10 is heated up.
  • the additional heat exchanger 22 comprises a first refrigerant channel 24 fluidly connecting the outlet of the condenser 18 to the inlet of the expansion device 16.
  • the refrigerant is additionally cooled down by the air in the air stream 28 and by the refrigerant coming from the evaporator 20.
  • the refrigerant is expanded and cooled down by the expansion device 16.
  • the evaporator 20 the refrigerant is heated up and the air stream in the air stream circuit 10 is cooled down.
  • the additional heat exchanger 22 comprises a fan 30 generating the air stream 28. At least the first refrigerant channel 24 is arranged within the air stream 28.
  • the fan 30 takes the air from outside the apparatus. It is not necessary that the air stream 28 requires an air-tight channel.
  • the only channel of the heat pump system can be the air stream circuit 10 which is preferably a closed circuit, in which the condenser 18, the evaporator 20 and the drum are arranged. In this example, the fan 30 blows only at the first refrigerant channel 24, but not at the second refrigerant channel 26.
  • the additional heat exchanger 22 comprises a second refrigerant channel 26 fluidly connecting the outlet of the evaporator 20 to the inlet of the compressor 14.
  • the refrigerant is additionally heated up by the refrigerant coming from the condenser 18.
  • the refrigerant is compressed and heated up again by the compressor 14.
  • the additional heat exchanger 22 removes heat from the first refrigerant channel 24, whereas due to the arrangement of the first refrigerant channel 24 and the second refrigerant channel 26 a superheating of the outlet of the evaporator 20 is improved.
  • the additional heat exchanger 22 comprises a plurality of fins 32 allowing a heat exchange between the first refrigerant channel 24 and the second refrigerant channel 26.
  • a first heat exchange between the first refrigerant channel 24 and the air blown by the fan 30 is performed.
  • a second heat exchange between the first refrigerant channel 24 and the second refrigerant channel 26 is performed in the additional heat exchanger 22.
  • FIG 2 illustrates a schematic view of the additional heat exchanger 22 for the heat pump system according to the preferred embodiment of the present invention.
  • the additional heat exchanger 22 is an air-fluid heat exchanger and is arranged within the air stream 28.
  • FIG 2 clarifies the arrangement of the first refrigerant channel 24, the second refrigerant channel 26 and the fins 32.
  • the fins 32 allow the heat exchange the first refrigerant channel 24 and the second refrigerant channel 26.
  • the additional heat exchanger 22 comprises a first refrigerant channel 24 and a second refrigerant channel 26.
  • the first refrigerant channel 24 and the second refrigerant channel 26 are formed as serpentine pipes in the additional heat exchanger 22.
  • the first refrigerant channel 24 comprises a plurality of straight channel sections (preferably five) and the second refrigerant channel 26 comprises a plurality of straight channel sections (preferably two).
  • the auxiliary condenser keeps the superheating phase out of the evaporator.
  • the additional heat exchanger 22 improves the heat pump performances.
  • the regenerative heat exchanger preserves the compressor from failure due to the entering of liquids. The time for drying the laundry and the energy consumption are reduced.

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

Abstract

The present invention relates to laundry machine with heat pump system. The heat pump system comprises an air stream circuit (10) and a closed refrigerant circuit (12) for a refrigerant. The air stream circuit (10) includes a condenser (18) and an evaporator (20). The air stream circuit (10) is associated to a drum for receiving laundry to be dried. The refrigerant circuit (12) includes at least one compressor (14), the condenser (18), at least one expansion device (16) and the evaporator (20). The air stream circuit (10) and the refrigerant circuit (12) are thermally coupled by the condenser (18) and the evaporator (20). The condenser (18) is a heat exchanger and provided for heating up the air stream in the air stream circuit (10) and cooling down the refrigerant in the refrigerant circuit (12). The evaporator (20) is a heat exchanger and provided for cooling down the air stream in the air stream circuit (10) and heating up the refrigerant in the refrigerant circuit (12). The heat pump system includes at least one additional heat exchanger (22) between the refrigerant coming from an outlet of the condenser (18), the refrigerant coming from an outlet of the evaporator (20) and air in a further air stream (28). Further, the present invention relates to a method for operating the laundry machine.

Description

  • The present invention relates to a laundry machine with heat pump system according to the preamble of claim 1. Further, the present invention relates to a method for operating the laundry machine according to the preamble of claim 13.
  • The heat pump technology is an efficient way to save energy in a laundry machine for example in tumble dryers, washer-dryers or washing machines. The following description will refer particularly to a tumble dryer but the invention is clearly applicable to other household appliances.
  • Usually the tumble dryer comprises an open or 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, e.g. an evaporator and a condenser.
  • In the air stream circuit hot dry air is blown into the drum containing wet laundry. Then warm humid air leaves the drum and is cooled down in the evaporator. The water vapour of the humid air is condensed and deposited in the evaporator, while a refrigerant in the refrigerant circuit evaporates and is heated up in the evaporator. Thus, the humid air is dehumidified by the condensation of the water vapour. Then cold dry air in the air stream circuit is blown to a condenser, in which said dry air is heated up, while the refrigerant condenses and is cooled down in the condenser. At last hot dry air is blown into the drum again.
  • 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 device, 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 up again by the compressor.
  • As the expansion device a capillary device is used, e.g. an expansion valve or a throttling device. The safe work of the compressor may not be impeded by the capillary tube design. The necessary superheating at the outlet of the evaporator must be realized and maintained. The efficiency is not optimum, because a portion of the evaporator is dedicated to overheat instead of dehumidify the air stream.
  • It is an object of the present invention to provide a heat pump system for a tumble dryer, which allows the compressor to work in safe way. Further, it is an object of the present invention to provide a corresponding method for operating said heat pump system.
  • The object of the present invention is achieved by the heat pump system according to claim 1.
  • According to the present invention the heat pump system includes at least one additional heat exchanger between the refrigerant coming from an outlet of the condenser, the refrigerant coming from an outlet of the evaporator and air in a further air stream.
  • The core of the present invention is the exchange of heat between two different points of the refrigerant circuit on the one hand and between the further air stream and at least one of said points on the other hand. The additional heat exchanger has a double function. A part of the additional heat exchanger act as an auxiliary condenser. Another part of the additional heat exchanger act as a regenerative heat exchanger. The auxiliary condenser is provided for that refrigerant, which comes from the outlet of the condenser. The regenerative heat exchanger is provided for that refrigerant, which comes from the outlet of the evaporator.
  • The auxiliary condenser keeps the superheating phase out of the evaporator. The expansion device may be reduced, e.g. a shorter capillary tube can be used. The present invention improves the heat pump performances. The regenerative heat exchanger preserves the compressor from failure due to entering of liquids. The time for drying the laundry is reduced. The energy consumption is also reduced.
  • According to a preferred embodiment of the present invention the additional heat exchanger comprises a first refrigerant channel interconnected between an outlet of the condenser and an inlet of the expansion device. Preferably, the first refrigerant channel within the further air stream works as the auxiliary condenser.
  • Further, the additional heat exchanger may comprise a second refrigerant channel interconnected between an outlet of the evaporator and an inlet of the compressor.
  • In particular, the second refrigerant channel is thermally coupled to the first refrigerant channel so as to works as the regenerative heat exchanger.
  • For example, the expansion device is or includes a capillary tube and/or an expansion valve.
  • Preferably, the condenser comprises a serpentine pipe for the refrigerant, wherein said serpentine pipe is arranged within the air stream circuit.
  • In a similar way, the evaporator may comprise a serpentine pipe for the refrigerant, wherein said serpentine pipe is arranged within the air stream circuit.
  • Further, the first refrigerant channel may comprise a serpentine pipe for the refrigerant, wherein said serpentine pipe is arranged within the further air stream.
  • Similarly, the second refrigerant channel may comprise a serpentine pipe for the refrigerant, wherein said serpentine pipe is thermally coupled to the first refrigerant channel.
  • For example, the further air stream is generated by at least one fan.
  • Further, the present invention relates to a corresponding tumble dryer with the heat pump system as described above.
  • The object of the present invention is further achieved by the method for operating the heat pump system according to claim 13.
  • According to the present invention there is an exchange of heat between the refrigerant coming from the condenser, the refrigerant coming from the evaporator and air within an air stream by an additional heat exchanger.
  • The main idea of the present invention is the exchange of heat between two different points of the refrigerant circuit and the air stream. The additional heat exchanger acts as an auxiliary condenser as well as a regenerative heat exchanger. The auxiliary condenser is provided for that refrigerant coming from the outlet of the condenser. The regenerative heat exchanger is provided for that refrigerant coming from the outlet of the evaporator.
  • The auxiliary condenser keeps the superheating phase out of the evaporator. The expansion device may be reduced, so that a shorter capillary tube can be used. The present invention improves the heat pump performances. The regenerative heat exchanger preserves the compressor from failure due to a liquid entering. The time for drying the laundry is reduced, so that the energy consumption is also reduced. Preferably, the method is performed by the heat pump system and/or the tumble dryer as described above.
  • The novel and inventive features believed to be the characteristic of the present invention are set forth in the appended claims.
  • The invention will be described in further detail with reference to the drawings, in which
    • FIG 1
    illustrates a schematic diagram of a heat pump system for a tumble dryer according to a preferred embodiment of the present invention, and
    FIG 2
    illustrates a schematic view of an additional heat exchanger for the heat pump system according to the preferred embodiment of the present invention.
  • FIG 1 illustrates a schematic diagram of a heat pump system for a tumble dryer according to a preferred embodiment of the present invention. The heat pump system comprises an air stream circuit 10 and a refrigerant circuit 12.
  • The air stream circuit 10 includes a drum, a condenser 18 and an evaporator 20. The drum is not shown in FIG 1. The drum is integrated within the air stream circuit 10 and provided for receiving laundry to be dried. Additionally, the air stream circuit 10 may include a fan. The air stream circuit 10 may be formed as a closed or an open loop. FIG 1 shows only a portion of the air stream circuit 10.
  • The condenser 18 and the evaporator 20 are air-fluid heat exchangers and form the interconnections between the air stream circuit 10 and the refrigerant circuit 12. 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, an additional heat exchanger 22, an expansion device 16 and the evaporator 20. The refrigerant circuit 12 forms a closed loop. The air stream circuit 10 and the refrigerant circuit 12 are thermally coupled by the condenser 18 and the evaporator 20. The additional heat exchanger 22 is also an air-fluid heat exchanger.
  • A refrigerant flows in the refrigerant circuit 12. The refrigerant is compressed and heated by the compressor 14. Then, the heated refrigerant reaches the condenser 18. In the condenser 18 the refrigerant condenses and is cooled down. At the same time, the air stream in the air stream circuit 10 is heated up.
  • The additional heat exchanger 22 comprises a first refrigerant channel 24 fluidly connecting the outlet of the condenser 18 to the inlet of the expansion device 16. In the first refrigerant channel 24 of the additional heat exchanger 22 the refrigerant is additionally cooled down by the air in the air stream 28 and by the refrigerant coming from the evaporator 20.
  • Then the refrigerant is expanded and cooled down by the expansion device 16. In the evaporator 20 the refrigerant is heated up and the air stream in the air stream circuit 10 is cooled down.
  • The additional heat exchanger 22 comprises a fan 30 generating the air stream 28. At least the first refrigerant channel 24 is arranged within the air stream 28. The fan 30 takes the air from outside the apparatus. It is not necessary that the air stream 28 requires an air-tight channel. The only channel of the heat pump system can be the air stream circuit 10 which is preferably a closed circuit, in which the condenser 18, the evaporator 20 and the drum are arranged. In this example, the fan 30 blows only at the first refrigerant channel 24, but not at the second refrigerant channel 26.
  • The additional heat exchanger 22 comprises a second refrigerant channel 26 fluidly connecting the outlet of the evaporator 20 to the inlet of the compressor 14. In the second refrigerant channel 26 of the additional heat exchanger 22 the refrigerant is additionally heated up by the refrigerant coming from the condenser 18. At last, the refrigerant is compressed and heated up again by the compressor 14.
  • The additional heat exchanger 22 removes heat from the first refrigerant channel 24, whereas due to the arrangement of the first refrigerant channel 24 and the second refrigerant channel 26 a superheating of the outlet of the evaporator 20 is improved. The additional heat exchanger 22 comprises a plurality of fins 32 allowing a heat exchange between the first refrigerant channel 24 and the second refrigerant channel 26.
  • Thus, in the additional heat exchanger 22 a first heat exchange between the first refrigerant channel 24 and the air blown by the fan 30 is performed. In a similar way, a second heat exchange between the first refrigerant channel 24 and the second refrigerant channel 26 is performed in the additional heat exchanger 22.
  • FIG 2 illustrates a schematic view of the additional heat exchanger 22 for the heat pump system according to the preferred embodiment of the present invention. The additional heat exchanger 22 is an air-fluid heat exchanger and is arranged within the air stream 28.
  • FIG 2 clarifies the arrangement of the first refrigerant channel 24, the second refrigerant channel 26 and the fins 32. The fins 32 allow the heat exchange the first refrigerant channel 24 and the second refrigerant channel 26.
  • The additional heat exchanger 22 comprises a first refrigerant channel 24 and a second refrigerant channel 26. The first refrigerant channel 24 and the second refrigerant channel 26 are formed as serpentine pipes in the additional heat exchanger 22. In this example, the first refrigerant channel 24 comprises a plurality of straight channel sections (preferably five) and the second refrigerant channel 26 comprises a plurality of straight channel sections (preferably two).
  • The auxiliary condenser keeps the superheating phase out of the evaporator. The additional heat exchanger 22 improves the heat pump performances. The regenerative heat exchanger preserves the compressor from failure due to the entering of liquids. The time for drying the laundry and the energy consumption are reduced.
  • Although an illustrative embodiment of the present invention has been described herein with reference to the accompanying drawings, it is to be understood that the present invention is not limited to that precise embodiment, and that various other changes and modifications may be affected therein by one skilled in the art without departing from the scope or spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as defined by the appended claims.
    • List of reference numerals
    • 10
    air stream circuit
    12
    refrigerant circuit
    14
    compressor
    16
    expansion device
    18
    condenser
    20
    evaporator
    22
    additional heat exchanger
    24
    first refrigerant channel
    26
    second refrigerant channel
    28
    air stream
    30
    fan
    32
    fins

Claims (14)

  1. A laundry machine with heat pump system, wherein:
    - the heat pump system comprises an air stream circuit (10) and a closed refrigerant circuit (12) for a refrigerant,
    - the air stream circuit (10) includes a condenser (18) and an evaporator (20),
    - the air stream circuit (10) is associated to a drum for receiving laundry to be dried,
    - the refrigerant circuit (12) includes at least one compressor (14), the condenser (18), at least one expansion device (16) and the evaporator (20),
    - the air stream circuit (10) and the refrigerant circuit (12) are thermally coupled by the condenser (18) and the evaporator (20),
    - the condenser (18) is a heat exchanger and provided for heating up the air stream the air stream circuit (10) and cooling down the refrigerant in the refrigerant circuit (12), and
    - the evaporator (20) is a heat exchanger and provided for cooling down the air stream in the air stream circuit (10) and heating up the refrigerant in the refrigerant circuit (12),
    characterized in that
    the heat pump system includes at least one additional heat exchanger (22) between the refrigerant coming from an outlet of the condenser (18), the refrigerant coming from an outlet of the evaporator (20) and air in a further air stream (28).
  2. The laundry machine according to claim 1, characterized in that
    the additional heat exchanger (22) comprises a first refrigerant channel (24) interconnected between an outlet of the condenser (18) and an inlet of the expansion device (16).
  3. The laundry machine according to claim 2,
    characterized in that
    the first refrigerant channel (24) within the further air stream (28) acts as an auxiliary condenser.
  4. The laundry machine according to any one of the preceding claims,
    characterized in that
    the additional heat exchanger (22) comprises a second refrigerant channel (26) interconnected between an outlet of the evaporator (18) and an inlet of the compressor (14).
  5. The laundry machine according to claim 4,
    characterized in that
    the second refrigerant channel (26) thermally coupled to the first refrigerant channel acts as a regenerative heat exchanger.
  6. The laundry machine according to any one of the preceding claims,
    characterized in that
    the expansion device (16) is or includes a capillary tube and/or an expansion valve.
  7. The laundry machine according to any one of the preceding claims,
    characterized in that
    the condenser (18) comprises a serpentine pipe for the refrigerant, wherein said serpentine pipe is arranged within the air stream circuit (10).
  8. The laundry machine according to any one of the preceding claims,
    characterized in that
    the evaporator (20) comprises a serpentine pipe for the refrigerant, wherein said serpentine pipe is arranged within the air stream circuit (10).
  9. The laundry machine according to any one of the preceding claims,
    characterized in that
    the first refrigerant channel (24) comprises a serpentine pipe for the refrigerant, wherein said serpentine pipe is arranged within the further air stream (28).
  10. The laundry machine according to any one of the preceding claims,
    characterized in that
    the second refrigerant channel (26) comprises a serpentine pipe for the refrigerant, wherein said serpentine pipe is thermally coupled to the first refrigerant channel.
  11. The laundry machine according to any one of the preceding claims,
    characterized in that
    the further air stream (28) is generated by at least one fan.
  12. The laundry machine according to any one of the preceding claims,
    characterized in that
    in the additional heat exchanger 22 a first heat exchange between the first refrigerant channel 24 and the air blown by the fan 30 is performed and a second heat exchange between the first refrigerant channel 24 and the second refrigerant channel 26 is performed in the additional heat exchanger 22.
  13. A method for operating laundry machine with heat pump system, said method comprises the steps of:
    - compressing and heating up a refrigerant in a closed refrigerant circuit (12) by a compressor (14),
    - condensing and cooling down the refrigerant by a condenser (18), wherein an air stream in an air stream circuit (10) is heated up by said condenser (18),
    - expanding and cooling down the refrigerant by an expansion device (16),
    - heating up the refrigerant by an evaporator (20), wherein the air in the air stream circuit (28) is cooled down, and
    - compressing and heating up again the refrigerant by the compressor (14).
    characterized in, that
    there is an exchange of heat between the refrigerant coming from the condenser (18), the refrigerant coming from the evaporator (20) and air within an air stream (28) by an additional heat exchanger (22).
  14. The method according to claim 13,
    characterized in, that
    the method is performed by a laundry machine according to any one of claims 1-12.
EP10161726A 2010-05-03 2010-05-03 A laundry machine with heat pump system and a method for operating the laundry machine Withdrawn EP2385169A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10161726A EP2385169A1 (en) 2010-05-03 2010-05-03 A laundry machine with heat pump system and a method for operating the laundry machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10161726A EP2385169A1 (en) 2010-05-03 2010-05-03 A laundry machine with heat pump system and a method for operating the laundry machine

Publications (1)

Publication Number Publication Date
EP2385169A1 true EP2385169A1 (en) 2011-11-09

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012130473A (en) * 2010-12-21 2012-07-12 Panasonic Corp Dehumidifying and heating apparatus and clothes dryer including the same
JP2012130476A (en) * 2010-12-21 2012-07-12 Panasonic Corp Dehumidifying and heating apparatus and clothes dryer including the same
EP2468948A3 (en) * 2010-12-21 2012-09-26 Panasonic Corporation Dehumidifying and heating apparatus and clothes drying machine using the same
EP2594688A1 (en) * 2011-11-21 2013-05-22 Electrolux Home Products Corporation N.V. A laundry dryer with a heat pump system
EP2644768A1 (en) * 2012-03-30 2013-10-02 BSH Electrodomésticos España, S.A. Heat pump for a clothes treatment appliance
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
US20140013614A1 (en) * 2011-03-29 2014-01-16 Woonje Choi Diagnostic method for a clothes treating apparatus
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EP2407587B2 (en) † 2010-07-16 2018-01-10 Miele & Cie. KG Washer dryer with heat pump
JP2012130476A (en) * 2010-12-21 2012-07-12 Panasonic Corp Dehumidifying and heating apparatus and clothes dryer including the same
EP2468948A3 (en) * 2010-12-21 2012-09-26 Panasonic Corporation Dehumidifying and heating apparatus and clothes drying machine using the same
JP2012130473A (en) * 2010-12-21 2012-07-12 Panasonic Corp Dehumidifying and heating apparatus and clothes dryer including the same
US20140013614A1 (en) * 2011-03-29 2014-01-16 Woonje Choi Diagnostic method for a clothes treating apparatus
US9134068B2 (en) * 2011-03-29 2015-09-15 Lg Electronics Inc. Diagnostic method for a clothes treating apparatus
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WO2013075997A1 (en) * 2011-11-21 2013-05-30 Electrolux Home Products Corporation N.V. A laundry dryer with a heat pump system
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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
EP2644768A1 (en) * 2012-03-30 2013-10-02 BSH Electrodomésticos España, S.A. Heat pump for a clothes treatment appliance
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EP2725132A3 (en) * 2012-10-22 2016-03-30 LG Electronics, Inc. Heat pump type laundry machine
AU2013245520B2 (en) * 2012-10-22 2018-01-18 Lg Electronics Inc. Heat pump type laundry machine
AU2018100480B4 (en) * 2012-10-22 2019-11-07 Lg Electronics Inc. Heat pump type laundry machine
EP3170935A1 (en) * 2012-10-30 2017-05-24 Electrolux Home Products Corporation N.V. Washing machine
EP2728052A1 (en) * 2012-10-30 2014-05-07 Electrolux Home Products Corporation N.V. Washing machine
EP3068940A1 (en) * 2013-11-13 2016-09-21 Electrolux Appliances Aktiebolag Heat pump laundry dryer
EP3346046A4 (en) * 2015-08-31 2018-08-29 Qingdao Haier Washing Machine Co., Ltd. High efficiency vented clothes dryer having heat pump system
US10689791B2 (en) 2015-08-31 2020-06-23 Qingdao Haier Washing Machine Co., Ltd. High efficiency vented dryer having a heat pump system
EP3279393A1 (en) * 2016-08-01 2018-02-07 LG Electronics Inc. Clothes treatment apparatus
US10793994B2 (en) 2016-08-01 2020-10-06 Lg Electronics Inc. Clothes treatment apparatus
US11293134B2 (en) 2016-08-01 2022-04-05 Lg Electronics Inc. Clothes treatment apparatus

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