(19)
(11)EP 3 426 838 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
11.12.2019 Bulletin 2019/50

(21)Application number: 17708258.3

(22)Date of filing:  02.03.2017
(51)International Patent Classification (IPC): 
D06F 58/20(2006.01)
(86)International application number:
PCT/EP2017/054891
(87)International publication number:
WO 2017/153242 (14.09.2017 Gazette  2017/37)

(54)

A LAUNDRY DRYER COMPRISING A THERMOELECTRIC ELEMENT

WÄSCHETROCKNER MIT EINEM THERMOELEKTRISCHEN ELEMENT

SÈCHE-LINGE COMPRENANT UN ÉLÉMENT THERMOÉLECTRIQUE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 07.03.2016 TR 201602929

(43)Date of publication of application:
16.01.2019 Bulletin 2019/03

(73)Proprietor: Arçelik Anonim Sirketi
34445 Istanbul (TR)

(72)Inventors:
  • KAPSIZ, Olcay
    34950 Istanbul (TR)
  • ERCAN, Onur
    34950 Istanbul (TR)
  • KARAGOZ, Selcuk
    34950 Istanbul (TR)
  • ABDIK, Bora
    34950 Istanbul (TR)
  • KOYUNCU, Unsal
    34950 Istanbul (TR)


(56)References cited: : 
WO-A1-2013/023958
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The present invention relates to a laundry dryer wherein energy saving is provided by using a thermoelectric element.

    [0002] In laundry dryers wherein the drying air is circulated through a closed cycle, the drying air moved by a fan is passed over the laundry inside the drum and dehumidified, and condensed in the condenser. The drying air condensed in the condenser is then heated by being passed over the heater and delivered onto the laundry again.

    [0003] In the state of the art, it is known that thermoelectric elements, also referred to as Peltier elements, are used in the laundry dryers to improve the drying efficiency and to save energy.

    [0004] In the state of the art European Patent Application No. EP2744936, a thermoelectric element disposed on the compressor used in the heat pump and the compressor cooling fan driven by the said thermoelectric element are disclosed. In this embodiment, the compressor and the compressor fan are disposed inside the same volume and thus, the temperature difference between the compressor casing and the environment surrounding the compressor is lower.

    [0005] The aim of the present invention is the realization of a laundry dryer wherein energy is saved by driving an element which is operated on direct current by means of the thermoelectric element.

    [0006] The laundry dryer realized in order to attain the aim of the present invention and explicated in the first claim and the respective claims thereof comprises a thermoelectric element that is mounted onto the drying fan motor and at least one fan that is operated with the power generated by the thermoelectric element. Therefore, the at least one cooling fan is enabled to be operated by utilizing the waste heat of the drying fan motor without the need for supplying additional power.

    [0007] The thermoelectric element is arranged on the cooling fan motor with its hot side contacting the same, and the output of the thermoelectric element is electrically connected to the cooling fan.

    [0008] In this embodiment, the compressor and/or the driving card on the control unit which enables the compressor to be driven are cooled by utilizing the waste heat generated in the drying air fan motor without the need for supplying additional power. The temperature difference between the surface of the motor that drives the drying air fan and the environment surrounding the same is about 70°C. When the hot side of the thermoelectric element is disposed so as to contact the motor and the cold side thereof is positioned so as to be open to the environment, a DC voltage is generated on the thermoelectric element. This voltage is used to operate an element that is operated on direct current.

    [0009] In an embodiment of the present invention, the cooling fan is a fan that blows air onto the compressor.

    [0010] In another embodiment of the present invention, the cooling fan is a fan that enables the driver card disposed on the control unit controlling the operation of the compressor to be cooled by blowing air onto the driver card.

    [0011] By means of the present invention, by utilizing the waste heat generated on the drying fan motor, the cooling fan is enabled to be driven without the need for supplying additional power and thus, energy efficiency is increased.

    [0012] A laundry dryer realized in order to attain the aim of the present invention is illustrated in the attached figures, where:

    Figure 1 - is the schematic perspective view of a laundry dryer.

    Figure 2 - is the schematic view of the laundry dryer in another embodiment of the present invention.



    [0013] The elements in the figures are numbered as follows:
    1. 1. Laundry dryer
    2. 2. Body
    3. 3. Drum
    4. 4. Compressor
    5. 5. Heat exchanger
    6. 6. Thermoelectric element
    7. 7. Hot side of the thermoelectric element
    8. 8. Cold side of the thermoelectric element
    9. 9. Outlet
    10. 10. Cable
    11. 11. Drying fan
    12. 12. Drying fan motor
    13. 13. ,131. Cooling fan
    14. 14. Air circulation duct
    15. 15. Control unit
    16. 16. Driver card


    [0014] The laundry dryer (1) comprises a body (2); a drum (3) wherein the laundry to be dried is placed; a compressor (4); an air circulation duct (14) that provides the delivery of the drying air onto the laundry inside the drum (3); a drying fan (11) that is disposed on the air circulation duct (14); a drying fan motor (12) that actuates the drying fan (11); a heat exchanger (5) that is disposed on the air circulation duct (14) and that enables the temperature of the drying air to be changed; at least one cooling fan (13, 131) that provides the cooling of the elements that get hot, and a thermoelectric element (6) that has a hot side (7) and a cold side (8), wherein the at least one cooling fan (13, 131) is operated by utilizing the power generated by the thermoelectric element (6) the hot side (7) of which is positioned on the drying fan motor(12).

    [0015] In heat pump laundry dryers (1), part of the energy supplied to the motor (12) that drives the compressor (4) and the drying fan (11) is converted into work and part thereof is released as heat with the irreversibility effect. In order to keep the said waste heat low and to enable the compressor (4) to operate within a temperature range determined by the producer, the elements heating up, especially the compressor (4) and/or the control unit (15) that drives the compressor (4) are cooled by at least one cooling fan (13, 131). In this embodiment, a thermoelectric element (6) is disposed onto the motor (12) connected to the drying fan (11) so that the hot side (7) thereof contacts the motor (12). In this case the hot side (7) of the thermoelectric element (6) contacts the motor (12) surface and the other side (8) is left open to the environment. Voltage is generated on the thermoelectric element (6) having a hot side (7) and a cold side (8). In an embodiment of the present invention, the laundry dryer (1) comprises a thermoelectric element (6) outlet (9) electrically connected to the cooling fan (13, 131), and the electrical connection therein is provided with a cable (10). The voltage generated on the thermoelectric element (6) is conducted to the cooling fan (13, 131) via the cable (10), thus enabling the cooling fan (13, 131) to be operated.

    [0016] In an embodiment of the present invention, the cooling fan (13) is a cooling fan (13) that is positioned in the vicinity of the compressor (4), enabling the compressor (4) to be cooled. Thus, without the need for supplying additional power, the compressor (4) is enabled to be cooled by utilizing the waste heat released from the drying fan motor (12) (Figure 1).

    [0017] During the drying cycle, the surface temperatures of the motor (12) which is the heat source and of the compressor (4) change and thus, the cooling requirement vary. Since the surface temperature of the compressor (4) is low at the beginning of the drying cycle, the need for cooling the compressor (4) is low. Similarly, since the temperature of the motor (12) at the beginning of the drying cycle is low as well, the voltage generated on the thermoelectric element (6) enables the cooling fan (13) to be operated at lower rotational speeds. However, since towards the end of the drying cycle, the voltage difference on the thermoelectric element (6) increases as a result of the increase in the surface temperature of the motor (12), the rotational speed and the flow rate of the cooling fan (13) increase as the necessity of cooling increases. Thus, the need for cooling is enabled to controlled at desired levels according to the waste heat generated on the fan motor (12) and thus, energy efficiency is increased.

    [0018] In an embodiment of the present invention, the cooling fan (131) is a cooling fan (131) that enables the driver card (16) disposed on the control unit (15) controlling the operation of the compressor (4) to be cooled. Thus, without the need for supplying additional power, the driver card (16) is enabled to be cooled by utilizing the waste heat released from the drying fan motor (12). In this embodiment, the outlet (9) of the thermoelectric element (6) is connected with the cable (10) to the cooling fans (13, 131) that blow air onto the compressor (4) and onto the driver card (16), and both cooling fans (13, 131) are driven by utilizing the voltage generated on the thermoelectric element (6).


    Claims

    1. A laundry dryer (1) comprising a body (2); a drum (3) wherein the laundry to be dried is placed; a compressor (4); an air circulation duct (14) that provides the delivery of the drying air onto the laundry inside the drum (3); a drying fan (11) that is disposed on the air circulation duct (14); a drying fan motor (12) that actuates the drying fan (11); a heat exchanger (5) that is disposed on the air circulation duct (14) and that enables the temperature of the drying air to be changed; at least one cooling fan (13, 131) that provides the cooling of the compressor (4) and/or a control unit (15) that controls the compressor (4); and a thermoelectric element (6) that has a hot side (7) and a cold side (8), characterized by

    - the thermoelectric element (6) the hot side (7) of which is positioned on the drying fan motor (12), and

    - the cooling fan (13, 131) that is operated by utilizing the power generated on the thermoelectric element (6).


     
    2. A laundry dryer (1) as in Claim 1, characterized by the thermoelectric element (6), the outlet (9) of which is electrically connected to the at least one cooling fan (13, 131).
     
    3. A laundry dryer (1) as in Claim 1 or Claim 2, characterized by the at least one cooling fan (13) that is positioned in the vicinity of the compressor (4), enabling the compressor (4) to be cooled.
     
    4. A laundry dryer (1) as in Claim 1 or Claim 2, characterized by the at least one cooling fan (131) that enables a driver card (16) located on the control unit (15) controlling the operation of the compressor (4) to be cooled.
     
    5. A laundry dryer (1) as in Claim 3 or 4, characterized by the thermoelectric element (6), the outlet (9) of which is electrically connected to the at least one cooling fan (13, 131) that blows air onto the compressor (4) and/or the driver card (16).
     


    Ansprüche

    1. Ein Wäschetrockner (1), umfasst einen Körper (2); eine Trommel (3), worin die zu trocknende Wäsche gelegt wird; einen Kompressor (4); einen Luftzirkulationskanal (14), der die Abgabe der Trocknungsluft auf die Wäsche in der Trommel (3) vorsieht; ein Trocknungsgebläse (11), das an dem Luftzirkulationskanal (14) angeordnet ist; einen Trockenlüftermotor (12), der den Trockenlüfter (11) betätigt; ein an dem Luftzirkulationskanal (14) angeordneter Wärmetauscher (5), der eine Änderung der Temperatur der Trocknungsluft ermöglicht; mindestens ein Kühlgebläse (13, 131), das die Kühlung des Kompressors (4) und / oder eine den Kompressor (4) steuernde Steuereinheit (15) bereitstellt; und ein thermoelektrisches Element (6), das eine heiße Seite (7) und eine kalte Seite (8) aufweist,
    gekennzeichnet durch,

    - das thermoelektrische Element (6), dessen heiße Seite (7) am Trockenlüftermotor (12) angeordnet ist, und

    - das Kühlgebläse (13, 131), das unter der Ausnutzung der am thermoelektrischen Element (6) erzeugten Leistung betrieben wird.


     
    2. Ein Wäschetrockner (1), wie in Anspruch 1 aufgeführt, ist dadurch
    gekennzeichnet, dass der Auslass (9) des thermoelektrischen Elements (6) elektrisch mit mindestens einen Kühlgebläse (13, 131) verbunden ist.
     
    3. Ein Wäschetrockner (1), wie in Anspruch 1 oder 2 aufgeführt, ist dadurch
    gekennzeichnet, dass mindestens ein Kühlgebläse (13) in der Nähe des Kompressors (4) angeordnet ist, um die Kühlung des Kompressors (4) zu ermöglichen.
     
    4. Ein Wäschetrockner (1), wie in Anspruch 1 oder 2 aufgeführt, ist dadurch
    gekennzeichnet, dass mindestens ein Kühllüfter (131) die Kühlung einer auf der Steuereinheit (15) angeordneten Treibkarte (16) ermöglicht, die den Betrieb des Kompressors (4) steuert.
     
    5. Ein Wäschetrockner (1), wie in Anspruch 3 oder 4 aufgeführt, ist dadurch
    gekennzeichnet, dass der Auslass (9) des thermoelektrische Elements (6) elektrisch mit mindestens einen Kühllüfter (13, 131) verbunden ist, der Luft auf den Kompressor (4) und / oder auf die Treibkarte (16) bläst.
     


    Revendications

    1. Un sèche-linge (1) comprenant un corps (2); un tambour (3) dans lequel est placé le linge à sécher; un compresseur (4); un conduit de circulation d'air (14) qui fournit l'apport en air de séchage sur le linge se trouvant à l'intérieur du tambour (3); un ventilateur de séchage (11) qui est disposé sur le conduit de circulation d'air (14); un moteur de ventilateur de séchage (12) qui actionne le ventilateur de séchage (11); un échangeur thermique (5) qui est disposé sur le conduit de circulation d'air (14) et qui permet de modifier la température de l'air de séchage; au moins un ventilateur de refroidissement (13, 131) qui assure le refroidissement du compresseur (4) et/ou une unité de contrôle (15) qui contrôle le compresseur (4); et un élément thermoélectrique (6) qui a un côté chaud (7) et un côté froid (8), caracterisé par

    - l'élément thermoélectrique (6) dont le côté chaud (7) est positionné sur le moteur du ventilateur de séchage (12), et

    - le ventilateur de refroidissement (13, 131) qui fonctionne en utilisant la puissance générée sur l'élément thermoélectrique (6).


     
    2. Un sèche-linge (1) selon la Revendication 1, caracterisé par l'élément thermoélectrique (6), dont la sortie (9) est électriquement connectée à au moins un ventilateur de refroidissement (13, 131).
     
    3. Un sèche-linge (1) selon la Revendication 1 ou 2, caracterisé par au moins un ventilateur de refroidissement (13) qui est positionné à proximité du compresseur (4), permettant au compresseur (4) de refroidir.
     
    4. Un sèche-linge (1) selon la Revendication 1 ou 2, caracterisé par au moins un ventilateur de refroidissement (131) qui permet de refroidir une carte driver (16) située sur l'unité de contrôle (15) contrôlant l'opération du compresseur (4).
     
    5. Un sèche-linge (1) selon la Revendication 3 ou 4, caracterisé par l'élément thermoélectrique (6), dont la sortie (9) est électriquement connectée à au moins un ventilateur de refroidissement (13, 131) qui souffle de l'air sur le compresseur (4) et/ou la carte driver (16).
     




    Drawing











    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description