EP3426838A1 - A laundry dryer comprising a thermoelectric element - Google Patents

A laundry dryer comprising a thermoelectric element

Info

Publication number
EP3426838A1
EP3426838A1 EP17708258.3A EP17708258A EP3426838A1 EP 3426838 A1 EP3426838 A1 EP 3426838A1 EP 17708258 A EP17708258 A EP 17708258A EP 3426838 A1 EP3426838 A1 EP 3426838A1
Authority
EP
European Patent Office
Prior art keywords
thermoelectric element
drying
compressor
fan
laundry
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.)
Granted
Application number
EP17708258.3A
Other languages
German (de)
French (fr)
Other versions
EP3426838B1 (en
Inventor
Olcay KAPSIZ
Onur ERCAN
Selcuk KARAGOZ
Bora Abdik
Unsal KOYUNCU
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
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP3426838A1 publication Critical patent/EP3426838A1/en
Application granted granted Critical
Publication of EP3426838B1 publication Critical patent/EP3426838B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements

Definitions

  • the present invention relates to a laundry dryer wherein energy saving is provided by using a thermoelectric element.
  • 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.
  • thermoelectric elements also referred to as Peltier elements
  • Peltier elements are used in the laundry dryers to improve the drying efficiency and to save energy.
  • thermoelectric element disposed on the compressor used in the heat pump and the compressor cooling fan driven by the said thermoelectric element are disclosed.
  • 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.
  • 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.
  • 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 fans that is operated with the power generated by the thermoelectric element. Therefore, the cooling fan is enabled to be operated by utilizing the waste heat of the drying fan motor without the need for supplying additional power.
  • 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.
  • 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 70oC.
  • the cooling fan is a fan that blows air onto the compressor.
  • 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.
  • the cooling fan is enabled to be driven without the need for supplying additional power and thus, energy efficiency is increased.
  • 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.
  • 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 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).
  • 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.
  • 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.
  • 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.
  • the compressor (4) is enabled to be cooled by utilizing the waste heat released from the drying fan motor (12) ( Figure 1).
  • 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.
  • 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.
  • the driver card (16) is enabled to be cooled by utilizing the waste heat released from the drying fan motor (12).
  • 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).

Landscapes

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

Abstract

The present invention relates to 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 elements that get hot, and a thermoelectric element (6) that has a hot side (7) and a cold side (8).

Description

    A LAUNDRY DRYER COMPRISING A THERMOELECTRIC ELEMENT
  • The present invention relates to a laundry dryer wherein energy saving is provided by using a thermoelectric element.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 fans that is operated with the power generated by the thermoelectric element. Therefore, the cooling fan is enabled to be operated by utilizing the waste heat of the drying fan motor without the need for supplying additional power.
  • 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.
  • 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 70ºC. 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.
  • In an embodiment of the present invention, the cooling fan is a fan that blows air onto the compressor.
  • 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.
  • 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.
  • 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.
  • The elements in the figures are numbered as follows:
    1. Laundry dryer
    2. Body
    3. Drum
    4. Compressor
    5. Heat exchanger
    6. Thermoelectric element
    7. Hot side of the thermoelectric element
    8. Cold side of the thermoelectric element
    9. Outlet
    10. Cable
    11. Drying fan
    12. Drying fan motor
    13. , 131. Cooling fan
    14. Air circulation duct
    15. Control unit
    16. Driver card
  • 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 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).
  • 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.
  • 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).
  • 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.
  • 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 (5)

  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 elements that get hot, 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 cooling fan (13, 131).
  3. A laundry dryer (1) as in Claim 1 or Claim 2, characterized by the 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 a cooling fan (131) that enables the 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 cooling fans (13, 131) that blow air onto the compressor (4) and the driver card (16) respectively.
EP17708258.3A 2016-03-07 2017-03-02 A laundry dryer comprising a thermoelectric element Active EP3426838B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201602929 2016-03-07
PCT/EP2017/054891 WO2017153242A1 (en) 2016-03-07 2017-03-02 A laundry dryer comprising a thermoelectric element

Publications (2)

Publication Number Publication Date
EP3426838A1 true EP3426838A1 (en) 2019-01-16
EP3426838B1 EP3426838B1 (en) 2019-12-11

Family

ID=58192316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17708258.3A Active EP3426838B1 (en) 2016-03-07 2017-03-02 A laundry dryer comprising a thermoelectric element

Country Status (2)

Country Link
EP (1) EP3426838B1 (en)
WO (1) WO2017153242A1 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011081022A1 (en) * 2011-08-16 2013-02-21 BSH Bosch und Siemens Hausgeräte GmbH Laundry drying apparatus with a heat pump comprising a drive and method for its operation

Also Published As

Publication number Publication date
EP3426838B1 (en) 2019-12-11
WO2017153242A1 (en) 2017-09-14

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