WO2017194511A1 - A laundry dryer comprising a filter - Google Patents

A laundry dryer comprising a filter Download PDF

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Publication number
WO2017194511A1
WO2017194511A1 PCT/EP2017/061009 EP2017061009W WO2017194511A1 WO 2017194511 A1 WO2017194511 A1 WO 2017194511A1 EP 2017061009 W EP2017061009 W EP 2017061009W WO 2017194511 A1 WO2017194511 A1 WO 2017194511A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
air
laundry dryer
particles
drying air
Prior art date
Application number
PCT/EP2017/061009
Other languages
French (fr)
Inventor
Servet SAPMAZ
Meryem ATILA
Murat Goktas
Selcuk KARAGOZ
Bora Abdik
Onur Ozdemir
Original Assignee
Arcelik Anonim Sirketi
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 Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2017194511A1 publication Critical patent/WO2017194511A1/en

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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 
    • D06F58/22—Lint collecting arrangements

Definitions

  • the present invention relates to a laundry dryer comprising a filter that holds particles such as fiber, lint and dust etc. in the drying air.
  • the heated air is directed into the drum containing the articles to be dried and is sucked to be included in the heating cycle again.
  • the particles such as fiber, lint and dust etc. should be filtered.
  • various filters are developed for holding these particles in dryers.
  • the said filters produced from various materials are disposed in the dryer on the circulation path of the air. Accumulation of the particles held by means of the filters during the cycle of air adversely affects the flow rate of the drying air and hence the drying performance. Therefore, during the drying cycle the said filters have to be cleaned at certain intervals and to be removed from the cycle of the drying air.
  • the thickness of the filter and the structure of the pores substantially affect the amount of the particles retained by the filter and the flow of the air.
  • the filters cause loss in resistance in the system, the thickness of the filter and the structure of the pores become a critical issue.
  • the aim of the present invention is the realization of a laundry dryer having a filter that enables the particles to be retained without preventing the air flow.
  • the laundry dryer realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof comprises a filter with a particle retention capacity varying from down upwards.
  • a filter with a particle retention capacity varying from down upwards.
  • a filter is realized, that causes less pressure and flow rate loss but that effectively retains the lints and fibers in the drying air.
  • the laundry dryer comprises the filter with features such as thickness, pore structure, pore density, etc. varying from bottom upwards. Since a higher amount of air flow is detected at the lower part of the filter than the upper part thereof as a result of the experiments conducted, the lower part of the filter is thicker and/or has a dense pore structure with respect to the upper part thereof.
  • the flow rate of the air is reduced from top to bottom in the vertical axis on the filter.
  • the particles are retained in the desired level and the flow rate in the system is prevented from decreasing.
  • the particle retention capacity of the filter increases from top to bottom.
  • the thickness of the filter increases from top to bottom.
  • the air passing through the upper part of the filter covers less distance in the filter than the air passing through the lower part thereof.
  • the filter surface that the drying air hits is inclined.
  • the filter surface that the drying air hits has a curved structure with increasing inclination towards the top.
  • the pore structure of the lower part of the filter is denser than the upper part thereof.
  • the filter causes less pressure and flow rate loss in the air circulation duct, the particles in the drying air are enabled to be effectively retained.
  • Figure 1 – is the schematic view of a laundry dryer.
  • Figure 2 – is the schematic perspective view of a filter.
  • Figure 3 – is the schematic perspective view of another embodiment of the present invention.
  • Figure 4 – is the front schematic view of another embodiment of the filter.
  • the laundry dryer (1) of the present invention comprises a body (2); a drum (3) wherein the laundry to be dried is placed; an air circulation duct (5) that enables the drying air to be delivered onto the laundry in the drum (3), and a heat exchanger (4) that is disposed on the air circulation duct (5) and that enables the temperature of the drying air to be changed.
  • the laundry dryer (1) furthermore comprises a filter (6) that is disposed on the air circulation duct (5) that retains particles such as lint, fiber, etc. in the drying air wherein the filter (6) decreases the flow rate of the air in the vertical direction, thus different parts thereof retain different amount of particles (Figure 1).
  • the drying air circulating in the air circulation duct (5) also carries particles such as fiber, lint, etc. coming off the laundry.
  • the drying air leaving the drum (3) hits the filter (6) that is preferably disposed in front of the heat exchanger (4). While the drying air hitting the filter (6) and containing impurities therein passes through the filter (6) with varying particle retention capacity thanks to the thickness and/or the pore structure thereof, the particles in the drying air are retained by the filter (6).
  • the heterogeneous structure and hence the particle retention capacity of the filter (6) of the present invention in the vertical axis vary depending on the thickness and/or the pore structure of the filter (6).
  • the filter (6) provides that the flow rate of the air is decreased from top to bottom, thus a higher amount of particles are retained by the lower part of the filter (6).
  • the lower part of the filter (6) is wider than the upper part thereof. Therefore, the amount of air passing through the lower and upper parts of the filter (6) in unit time varies.
  • the filter (6) is in the form of a truncated prism with the width narrowing from the base to the ceiling.
  • the surface (A) of the filter (6) that the drying air hits is flat and inclined. Thus, the particles retained on the filter (6) are enabled to fall down with gravity when the air flow is interrupted ( Figure 2).
  • the surface (A) of the filter (6) that the drying air hits has a curved structure with increasing inclination towards the top.
  • the other surface is flat.
  • the pore structure of the lower part of the filter (6) is denser than the upper part thereof.
  • the size of the pores at the lower part of the filter (6) are smaller than the upper part thereof.
  • the upper part of the filter (6) is narrower than the lower part thereof and the pore structure of the lower part is denser than the upper part.
  • the drying air cleansed of particles cover less distance in the filter (6).
  • the drying air containing a larger amount of particles with respect to the upper part covers more distance in the filter (6).
  • the filter (6) is positioned in front of the heat exchanger (4) in the air circulation duct (5).
  • the filter (6) causes less pressure and flow rate loss in the air circulation duct (5), the particles in the drying air are enabled to be effectively retained.

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; an air circulation duct (5) that enables the drying air to be delivered onto the laundry in the drum (3); a heat exchanger (4) that is disposed on the air circulation duct (5) and that enables the temperature of the drying air to be changed, and a filter (6).

Description

A LAUNDRY DRYER COMPRISING A FILTER
The present invention relates to a laundry dryer comprising a filter that holds particles such as fiber, lint and dust etc. in the drying air.
In dryers, the heated air is directed into the drum containing the articles to be dried and is sucked to be included in the heating cycle again. During this cycle of air, the particles such as fiber, lint and dust etc. should be filtered. To this end, various filters are developed for holding these particles in dryers. The said filters produced from various materials are disposed in the dryer on the circulation path of the air. Accumulation of the particles held by means of the filters during the cycle of air adversely affects the flow rate of the drying air and hence the drying performance. Therefore, during the drying cycle the said filters have to be cleaned at certain intervals and to be removed from the cycle of the drying air. However, the thickness of the filter and the structure of the pores substantially affect the amount of the particles retained by the filter and the flow of the air. Moreover, since the filters cause loss in resistance in the system, the thickness of the filter and the structure of the pores become a critical issue.
In the state of the art European Patent Application No. EP2309053, a two-layer filter preventing the particles from reaching the heat exchanger is used.
The aim of the present invention is the realization of a laundry dryer having a filter that enables the particles to be retained without preventing the air flow.
The laundry dryer realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof comprises a filter with a particle retention capacity varying from down upwards. Thus, while the particles are enabled to be effectively retained, the air flow is regulated as well.
By means of the present invention, a filter is realized, that causes less pressure and flow rate loss but that effectively retains the lints and fibers in the drying air. The laundry dryer comprises the filter with features such as thickness, pore structure, pore density, etc. varying from bottom upwards. Since a higher amount of air flow is detected at the lower part of the filter than the upper part thereof as a result of the experiments conducted, the lower part of the filter is thicker and/or has a dense pore structure with respect to the upper part thereof. By means of the said filter, the flow rate of the air is reduced from top to bottom in the vertical axis on the filter. Thus, the particles are retained in the desired level and the flow rate in the system is prevented from decreasing.
In an embodiment of the present invention, the particle retention capacity of the filter increases from top to bottom.
In another embodiment of the present invention, the thickness of the filter increases from top to bottom. In this case, the air passing through the upper part of the filter covers less distance in the filter than the air passing through the lower part thereof. In a version of this embodiment, the filter surface that the drying air hits is inclined. Thus, the particles retained by the upper part of the filter are enabled to slide down and be removed from the filter. In another version of this embodiment, the filter surface that the drying air hits has a curved structure with increasing inclination towards the top.
In another embodiment of the present invention, the pore structure of the lower part of the filter is denser than the upper part thereof.
By means of the present invention, while the filter causes less pressure and flow rate loss in the air circulation duct, the particles in the drying air are enabled to be effectively retained.
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 view of a laundry dryer.
Figure 2 – is the schematic perspective view of a filter.
Figure 3 – is the schematic perspective view of another embodiment of the present invention.
Figure 4 – is the front schematic view of another embodiment of the filter.
The elements in the figures are numbered as follows:
  1. Laundry dryer
  2. Body
  3. Drum
  4. Heat exchanger
  5. Air circulation duct
  6. Filter
A: Surface that the drying air hits
The laundry dryer (1) of the present invention comprises a body (2); a drum (3) wherein the laundry to be dried is placed; an air circulation duct (5) that enables the drying air to be delivered onto the laundry in the drum (3), and a heat exchanger (4) that is disposed on the air circulation duct (5) and that enables the temperature of the drying air to be changed. The laundry dryer (1) furthermore comprises a filter (6) that is disposed on the air circulation duct (5) that retains particles such as lint, fiber, etc. in the drying air wherein the filter (6) decreases the flow rate of the air in the vertical direction, thus different parts thereof retain different amount of particles (Figure 1).
During the operation of the laundry dryer (1), the drying air circulating in the air circulation duct (5) also carries particles such as fiber, lint, etc. coming off the laundry. The drying air leaving the drum (3) hits the filter (6) that is preferably disposed in front of the heat exchanger (4). While the drying air hitting the filter (6) and containing impurities therein passes through the filter (6) with varying particle retention capacity thanks to the thickness and/or the pore structure thereof, the particles in the drying air are retained by the filter (6). The heterogeneous structure and hence the particle retention capacity of the filter (6) of the present invention in the vertical axis vary depending on the thickness and/or the pore structure of the filter (6). Thus, while the particles carried by the drying air are effectively retained, the flow rate of the drying air is prevented from decreasing due to the filter (6) and the filter (6) is prevented from causing resistance against the air flow.
During the experiments conducted for the present invention, it is determined that the air flow in the lower part of the air circulation duct (5) is denser than the upper part thereof. Therefore, in the preferred embodiment of the present invention, the filter (6) provides that the flow rate of the air is decreased from top to bottom, thus a higher amount of particles are retained by the lower part of the filter (6).
In an embodiment of the present invention, the lower part of the filter (6) is wider than the upper part thereof. Therefore, the amount of air passing through the lower and upper parts of the filter (6) in unit time varies. In this embodiment of the present invention, the filter (6) is in the form of a truncated prism with the width narrowing from the base to the ceiling. In this embodiment, the surface (A) of the filter (6) that the drying air hits is flat and inclined. Thus, the particles retained on the filter (6) are enabled to fall down with gravity when the air flow is interrupted (Figure 2).
In another version of this embodiment, the surface (A) of the filter (6) that the drying air hits has a curved structure with increasing inclination towards the top. The other surface is flat. By means of this structure, the particles retained at the upper part of the filter (6) are enabled to fall down by themselves (Figure 3).
In another embodiment of the present invention, the pore structure of the lower part of the filter (6) is denser than the upper part thereof. In this embodiment, the size of the pores at the lower part of the filter (6) are smaller than the upper part thereof.
In an embodiment of the present invention, the upper part of the filter (6) is narrower than the lower part thereof and the pore structure of the lower part is denser than the upper part. By means of the upper part of the filter (6) with a narrower width but wider pore structure, while larger particles are retained by the filter (6), the drying air cleansed of particles cover less distance in the filter (6). Contrary to this, while passing through the lower part with a denser pore structure, the drying air containing a larger amount of particles with respect to the upper part covers more distance in the filter (6).
In an embodiment of the present invention, the filter (6) is positioned in front of the heat exchanger (4) in the air circulation duct (5).
By means of the present invention, while the filter (6) causes less pressure and flow rate loss in the air circulation duct (5), the particles in the drying air are enabled to be effectively retained.

Claims (9)

  1. A laundry dryer (1) comprising a body (2); a drum (3) wherein the laundry to be dried is placed; an air circulation duct (5) that enables the drying air to be delivered onto the laundry in the drum (3), and a heat exchanger (4) that is disposed on the air circulation duct (5) and that enables the temperature of the drying air to be changed, characterized by a filter (6) that is disposed on the air circulation duct (5), that retains particles such as lint, fiber, etc. in the drying air wherein the filter (6) decreases the flow rate of the air in the vertical direction, thus different parts thereof retain different amount of particles.
  2. A laundry dryer (1) as in Claim 1, characterized by the filter (6) provides that the flow rate of the air is decreased from top to bottom, thus a higher amount of particles are retained by the lower part of the filter (6).
  3. A laundry dryer (1) as in Claim 1, 2, characterized by the filter (6) the lower part of which is wider than the upper part.
  4. A laundry dryer (1) as in Claim 3, characterized by the filter (6) that is in the form of a truncated prism with the width narrowing from the base to the ceiling.
  5. A laundry dryer (1) as in Claim 4, characterized by the filter (6) of which the surface (A) that the drying air hits is flat and inclined.
  6. A laundry dryer (1) as in Claim 4, characterized by the filter (6) of which the surface (A) that the drying air hits has a curved structure with increasing inclination towards the top.
  7. A laundry dryer (1) as in any one of the above claims, characterized by the filter (6) the lower part of which has a denser pore structure than the upper part thereof.
  8. A laundry dryer (1) as in any one of the above claims, characterized by the filter (6) wherein the upper part thereof is narrower than the lower part and the pore structure of the lower part is denser than the upper part.
  9. A laundry dryer (1) as in any one of the above claims, characterized by the filter (6) that is positioned in front of the heat exchanger (4) in the air circulation duct (5).
PCT/EP2017/061009 2016-05-09 2017-05-09 A laundry dryer comprising a filter WO2017194511A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2016/06088 2016-05-09
TR201606088 2016-05-09

Publications (1)

Publication Number Publication Date
WO2017194511A1 true WO2017194511A1 (en) 2017-11-16

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PCT/EP2017/061009 WO2017194511A1 (en) 2016-05-09 2017-05-09 A laundry dryer comprising a filter

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5651188A (en) * 1995-04-20 1997-07-29 Whirlpool Corporation Lint storage system
US5897776A (en) * 1997-10-03 1999-04-27 Dana Corporation Filter media configuration
WO2011013121A1 (en) * 2009-07-27 2011-02-03 Airfreedom Ltd. Improved filter configuration
EP2309053A1 (en) 2009-10-09 2011-04-13 Miele & Cie. KG Laundry treatment machine, in particular laundry dryer
US20130283743A1 (en) * 2012-04-30 2013-10-31 K&N Engineering, Inc. Air filter
DE102013108565A1 (en) * 2013-08-08 2015-02-12 Miele & Cie. Kg Filter element with a folded filter medium and device, in particular household appliance, with such a filter element

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5651188A (en) * 1995-04-20 1997-07-29 Whirlpool Corporation Lint storage system
US5897776A (en) * 1997-10-03 1999-04-27 Dana Corporation Filter media configuration
WO2011013121A1 (en) * 2009-07-27 2011-02-03 Airfreedom Ltd. Improved filter configuration
EP2309053A1 (en) 2009-10-09 2011-04-13 Miele & Cie. KG Laundry treatment machine, in particular laundry dryer
US20130283743A1 (en) * 2012-04-30 2013-10-31 K&N Engineering, Inc. Air filter
DE102013108565A1 (en) * 2013-08-08 2015-02-12 Miele & Cie. Kg Filter element with a folded filter medium and device, in particular household appliance, with such a filter element

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