EP2042641A1 - Wäschetrockner - Google Patents

Wäschetrockner Download PDF

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Publication number
EP2042641A1
EP2042641A1 EP07117158A EP07117158A EP2042641A1 EP 2042641 A1 EP2042641 A1 EP 2042641A1 EP 07117158 A EP07117158 A EP 07117158A EP 07117158 A EP07117158 A EP 07117158A EP 2042641 A1 EP2042641 A1 EP 2042641A1
Authority
EP
European Patent Office
Prior art keywords
laundry dryer
dryer according
airflow
chamber
section
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Withdrawn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
EP07117158A
Other languages
English (en)
French (fr)
Inventor
Maxim Valerievich Mishin
Giancarlo Arrigoni
Sergei Alexandrov
Edi Fabbro
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 EP07117158A priority Critical patent/EP2042641A1/de
Priority to EP11187915A priority patent/EP2423374A1/de
Priority to RU2008138092/12A priority patent/RU2466228C2/ru
Publication of EP2042641A1 publication Critical patent/EP2042641A1/de
Withdrawn legal-status Critical Current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 

Definitions

  • the present invention relates to a laundry dryer having an improved air dewatering device.
  • the expression "laundry dryer” should be construed as including also washing/drying appliances, i.e. appliances having washing and drying capabilities combined in a single machine.
  • washing/drying appliances i.e. appliances having washing and drying capabilities combined in a single machine.
  • such expression is intended to include both front loading laundry appliances both top loading laundry appliances.
  • the first category comprises vented dryers wherein an air flow is heated an passed through a drying chamber where laundry to be treated is dried. The air flow removes the laundry moisture and leaves the drying chamber with a high humidity grade.
  • humid air flow is exhausted from the machine normally in the same room where the dryer is placed, or in another environment if appropriate exhausting conduits are provided.
  • This kind of dryers are simple and economic in construction but they are not always practical to install in a house, both because exhausting humid air inside a room is not desired, both because, in order to exhaust the air flow exiting the drying chamber outside the house, it is necessary to drill a huge hole in the perimetric wall of the house for receiving the exhausting pipe.
  • the second category of known laundry dryers comprises the condenser dryers wherein the heated air flow is passed cyclically through a drying chamber and a condenser that removes moisture from the air flow exiting the drying chamber. Moisture removed by the air flow, which operates in a closed circuit, is recovered in a tank that must be periodically emptied by a user.
  • condenser dryers have been made object of an intense research for reducing their power consumption.
  • the most efficient condenser dryers comprise a heat pump for providing warm air to the drying chamber.
  • drying machines have some drawbacks such as a high number of components and a complicate working process.
  • a further drawback of dryers comprising a heat pump for heating air consists in the use of fluorinated refrigerants that imply constraints in terms of management during manufacturing and at the end of the appliance working life.
  • Another drawback of such machines is due to the presence, inside the appliance, of non removable heat exchangers that cannot be appropriately cleaned with the consequence that fluff developed during drying operations deposits on heat exchangers determining a rapid reduction of efficiency.
  • the aim of the present invention is therefore to solve the noted problems and thus providing a laundry dryer having an improved drying efficiency, the same dryer having a reduced number of components compared to dryers of known type.
  • Another object of the present invention is to provide a laundry dryer having a cabinet within which each component is displaced in a more rationalized manner thereby reducing the amount of unused cabinet inner volume.
  • Another object of the invention is to provide a laundry dryer of improved reliability, the same being simple to be assembled.
  • Still another object of the invention is to provide a laundry dryer requiring little maintenance.
  • Figure 1 schematically shows a laundry dryer according to the present invention
  • Figure 2 schematically shows a detail of a dewatering unit used in the dryer of figure 1 ;
  • Figure 3 schematically shows a second embodiment of a ionization section
  • a laundry dryer comprise a cabinet 1 within which it is rotatably mounted a drum 2 defining a chamber 4 adapted to receive articles 3 to be dried.
  • An air circuit 5 is provided for recirculating cyclically drying air through the chamber 4.
  • An intake manifold 6 extracts a moist airflow from the chamber 4 and drives it through a filter 7 where lint and/or fluff are trapped.
  • Moist air from chamber 4 is extracted by a fan 8 placed in the air circuit 5. After being filtered, air from the chamber 4 is passed through a dewatering unit 9 in which moisture grade in the moist airflow is progressively reduced.
  • Said dewatering unit 9 comprises a ionization section 10 provided for maintaining a corona electric discharge that electrically charges water droplets dispersed in the moist airflow promoting their precipitation, thereby causing the airflow to be dried.
  • the ionization section 10 comprises corona discharge means 11 comprising a grid-like cathode 12 facing a moist air inlet opening 13 so as to be invested by the moist airflow coming from the drying chamber 4.
  • Cathode 12 is provided with a plurality of wire tips 14 serving for concentration of electric field and reduction of discharge ignition voltage.
  • Cathode 12 is powered by suitable high voltage generating means 15. Anode is performed by grounded walls of the air circuit 5. Water extracted from the moist airflow is collected in a bottom part 16 of the ionization section 10 and drained by a tube 17 and pumping means 18. Said water is stored in a compartment 19 (see figure 1 ) that must be periodically emptied by a user.
  • FIG 3 it is shown a second embodiment of a ionization section 210 to be used in a dewatering unit 9.
  • the ionization section 210 comprise a first bottom compartment 220 having an air inlet opening 213 for receiving moist air from the chamber 4 and a second upper compartment 221 (electric discharge compartment). Compartments 220 and 221 communicates through an aperture 222 on which a mesh structure 223 is mounted.
  • Corona discharge means 211 are provided and comprise a cathode 212, in the form of a wire 224 which is mounted in and extend within the discharge compartment 221 for electrically charging water droplets dispersed in the moist airflow entering the bottom compartment 220, causing the airflow to be dried.
  • Wire 224 is displaced so as to face the mesh structure 223 and it is powered by suitable high voltage generating means 15.
  • a ionization section 210 can be used in the laundry dryer shown in figure 1 as alternative to the first embodiment 10 depicted therein.
  • a fan 8 is preferably placed downstream of the ionization section 10, 210 for circulating air within the air circuit 5.
  • Fan 8 can be of axial or centrifugal type according to the design needs.
  • a laundry dryer according to the present invention can be provided with a dewatering unit 9 further comprising a precipitation section 25 shown in figures 1 and, in grater detail, also in figure 2 .
  • a precipitation section 25 is displaced downstream of the ionization section 10, 210 and, preferably, downstream of the fan 8.
  • Precipitation section 25 receives air exiting the ionization section 10, 210 and, in combination with the latter, contributes to further reducing the moisture dispersed in the airflow.
  • Precipitation section 25 is provided with electric field generating means 26 comprising a plurality of plates 27, 28.
  • a first group of plates 28 are powered by suitable high-voltage generating means 15 and form a plurality of cathodes, while a second group of plates 27 are grounded and form a plurality of anodes. Plates 27, 28 are arranged in a alternate manner such that each cathode plate 28 is spaced apart and parallel to at least a anode plate 27.
  • Plates 27, 28 forms a plurality of channels 29 adapted to receive the airflow exiting the ionization section 10, 210.
  • channels 29 divides in a corresponding number of portions and, because of the electric field generated by plates 27, 28, water drops dispersed in the airflow and positively charged by the ionization section 10, 210, are driven onto the surfaces of the grounded plates 27.
  • Precipitated water is collected in a bottom portion 33 of the precipitation section 25 and it is drained by a tube 17 and pumping means 18 that can be the same used for draining water from the ionization section 10, 210.
  • Water drained from the precipitation section 25 is stored in a compartment 19 (see figure 1 ) that must be periodically emptied by a user.
  • Dewatered air exiting the precipitation section 25 is received by a manifold 31 that drives the air to a rear bulkhead 32 (see figure 1 ) having air diffusion means for introducing air inside the chamber 4.
  • a precipitation section 25 may be optional and reserved for dryers where the amount of moisture in the airflow is very high.
  • manifold 31 receives air discharged by the ionization section 10, 210 and drives it to the bulkhead 32.
  • the precipitation section 25 the latter can be displaced just downstream of the ionization section 10, 210 and further downstream of the precipitation section 25, a fan 8 is mounted.
  • the air circulation within the circuit 5 continues cyclically without exhausting air outside the appliance until the drying process is completed.
  • Heating means of known type are provided in the air circuit 5 for heating the airflow circulating therein.
  • the first embodiment of the ionization section 10 illustrated in figures 1 and 2 has shown a great efficiency in charging the water droplet dispersed in the moist airflow, while the second embodiment 210 depicted in figure 3 provides better discharge stability, higher electric strength and lower air flow disturbance.
  • the present invention allows a laundry dryer to efficiently remove water from a moist airflow by means of a compact and reliable dewatering device.
  • the latter has a size which is smaller than that of a condenser normally used for a laundry dryer of known type and therefore the inner volume of a laundry cabinet can be used for displacing the appliance components in a more rationalized manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP07117158A 2007-09-25 2007-09-25 Wäschetrockner Withdrawn EP2042641A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07117158A EP2042641A1 (de) 2007-09-25 2007-09-25 Wäschetrockner
EP11187915A EP2423374A1 (de) 2007-09-25 2007-09-25 Wäschetrockner
RU2008138092/12A RU2466228C2 (ru) 2007-09-25 2008-09-24 Сушилка для белья

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07117158A EP2042641A1 (de) 2007-09-25 2007-09-25 Wäschetrockner

Publications (1)

Publication Number Publication Date
EP2042641A1 true EP2042641A1 (de) 2009-04-01

Family

ID=39100068

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07117158A Withdrawn EP2042641A1 (de) 2007-09-25 2007-09-25 Wäschetrockner
EP11187915A Withdrawn EP2423374A1 (de) 2007-09-25 2007-09-25 Wäschetrockner

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP11187915A Withdrawn EP2423374A1 (de) 2007-09-25 2007-09-25 Wäschetrockner

Country Status (2)

Country Link
EP (2) EP2042641A1 (de)
RU (1) RU2466228C2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022142190A1 (zh) * 2020-12-28 2022-07-07 青岛海尔洗衣机有限公司 烘干机
WO2022142207A1 (zh) * 2020-12-28 2022-07-07 青岛海尔洗衣机有限公司 烘干机
WO2023116819A1 (zh) * 2021-12-24 2023-06-29 青岛海尔洗衣机有限公司 除湿装置和烘干机
WO2025260720A1 (zh) * 2024-06-19 2025-12-26 青岛海尔洗衣机有限公司 烘干设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5435837A (en) * 1993-12-06 1995-07-25 Lewis; Keith B. Ion generation structure in environmental systems
JPH10118593A (ja) * 1996-10-16 1998-05-12 Koasu Corp:Kk クリーンルーム用衣服とその付属品の除塵，乾燥及び滅菌方法及び該装置
JP2004065427A (ja) * 2002-08-05 2004-03-04 Matsushita Electric Ind Co Ltd 洗濯機
EP1445367A1 (de) * 2001-11-08 2004-08-11 Sharp Kabushiki Kaisha Waschtrockner

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1533726A1 (ru) * 1987-11-20 1990-01-07 Государственный Научно-Исследовательский И Проектный Институт Нефтяной И Газовой Промышленности Им.В.А.Муравленко Электродегидратор
SU1587093A1 (ru) * 1988-03-23 1990-08-23 В.П.Алешин Сушильна машина дл бель
CA2116761A1 (en) * 1994-03-01 1995-09-02 Keith B. Lewis Ion generation structure in environmental systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5435837A (en) * 1993-12-06 1995-07-25 Lewis; Keith B. Ion generation structure in environmental systems
JPH10118593A (ja) * 1996-10-16 1998-05-12 Koasu Corp:Kk クリーンルーム用衣服とその付属品の除塵，乾燥及び滅菌方法及び該装置
EP1445367A1 (de) * 2001-11-08 2004-08-11 Sharp Kabushiki Kaisha Waschtrockner
JP2004065427A (ja) * 2002-08-05 2004-03-04 Matsushita Electric Ind Co Ltd 洗濯機

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022142190A1 (zh) * 2020-12-28 2022-07-07 青岛海尔洗衣机有限公司 烘干机
WO2022142207A1 (zh) * 2020-12-28 2022-07-07 青岛海尔洗衣机有限公司 烘干机
JP2022104226A (ja) * 2020-12-28 2022-07-08 青島海爾洗衣机有限公司 乾燥機
JP2022104227A (ja) * 2020-12-28 2022-07-08 青島海爾洗衣机有限公司 乾燥機
WO2023116819A1 (zh) * 2021-12-24 2023-06-29 青岛海尔洗衣机有限公司 除湿装置和烘干机
WO2025260720A1 (zh) * 2024-06-19 2025-12-26 青岛海尔洗衣机有限公司 烘干设备

Also Published As

Publication number Publication date
RU2008138092A (ru) 2010-03-27
RU2466228C2 (ru) 2012-11-10
EP2423374A1 (de) 2012-02-29

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Owner name: ELECTROLUX HOME PRODUCTS CORPORATION N.V.

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