EP1022373A2 - Air-exhaust type clothes tumble drier - Google Patents
Air-exhaust type clothes tumble drier Download PDFInfo
- Publication number
- EP1022373A2 EP1022373A2 EP99122974A EP99122974A EP1022373A2 EP 1022373 A2 EP1022373 A2 EP 1022373A2 EP 99122974 A EP99122974 A EP 99122974A EP 99122974 A EP99122974 A EP 99122974A EP 1022373 A2 EP1022373 A2 EP 1022373A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- drum
- filtering means
- tumble drier
- appliance
- 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
Links
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 230000001627 detrimental effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000002459 sustained effect Effects 0.000 claims 2
- 238000004140 cleaning Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000011068 loading method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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 refers to a tumble drier for clothes and other items, in particular an exhaust-type tumble drier.
- a tumble drier comprises a substantially parallelepiped outer casing in which there is enclosed a drum that, driven by an electric motor via a driving belt, is adapted to rotate according to a more or less horizontal axis.
- the items to be dried are loaded in the drum through a door mounted on the front wall or the top wall of said outer casing.
- a fan located inside the outer casing, takes in fresh air from the room in which the appliance is installed and forces it into the drum after it has been duly heated up by electric heating means or gas burners that are also provided inside the outer casing of the appliance.
- the hot air is forced to flow through the interior of the drum, becomes saturated with the humidity it subtracts from the items loaded in the drum, which are in this way progressively dried, and is finally exhausted from the appliance.
- the airborne impurities that are present in the installation room are taken in into the appliance along with the drying air.
- the air intake occurs through apertures provided in the lower portion of the outer casing, eg. through the rear wall, the base of the appliance or even the zone below the loading door when the latter is attached to the front wall, further to such contaminants as cigarette smoke, odours generated during cooking (if the appliance is installed in a kitchen) or even possible airborne germs, ie. germs that can be transmitted by air, particularly significant, among airborne impurities in general, are the dust rolls or clots that form on the floor. In all cases, such impurities eventually come into contact with the items loaded in the drum for drying, and this of course has clear negative effects, in particular if such items are constituted by clothes made of silk, sponge cloth or similar fabrics.
- a tumble drier for clothes and other items comprising, inside an outer casing, a rotating drum adapted to be loaded with the items to be dried, heating means as well as means capable of ensuring a forced circulation of air through the drum, means for exhausting the air from the drier after that, inside the drum, it has saturated with the humidity subtracted from the drying items, wherein along the flow-path between the air intake zone of the appliance and the zone at which said air then flows into the drum there are provided means adapted to retain the impurities carried by the air or present in the air taken in from the room in which the appliance is installed.
- the tumble drier illustrated in the above cited Figures comprises a substantially parallelepiped outer casing 1 with a worktop 2, a front panel 3 carrying the control organs 4, 5.
- a metal drum 6 Inside the outer casing 1 there is arranged a metal drum 6 that is adapted to be driven rotatably about a more or less horizontal axis X by an electric motor via a drive belt (for reasons of greater simplicity, these last items are not shown in the Figures).
- the aperture of the front flange 7 of the drum 6 is capable of being closed by a rectangular door 8 that is hinged on to the front wall 9 of the outer casing 1.
- the air is taken in from the room in which the drier is installed by a motor-driven fan (not shown in the Figures, but anyway arranged in the lower front zone of the outer casing 1) through an intake aperture 21 which is part of a pull-out drawer 20 that is accessible from the front panel 3.
- the air is forced to flow through a first horizontal conduit 10 provided immediately below the worktop 2 and, in a sequence, an electric heating unit 11 and a second vertical conduit 12 provided therebelow. After having so been heated up, the air is then blown into the drum 6 through a plurality of perforations 13 provided in the rear flange 14 thereof.
- the hot air leaves the drum 6 through an annular aperture which, duly provided with a lint filter, is located on the inside, ie. the liner of the door 8.
- the moisture-laden, hot air is then conveyed through a third conduit (not shown, like the afore cited annular aperture and the lint filter)) up to a final aperture 15 located in the lowest portion of the left wall 16 of the outer casing 1.
- a flexible hose (not shown, either) in order to definitively exhaust the air outside the building in which the drier is installed.
- the box-like body of the drawer 20 sustains a frame 23 that is capable of swinging thanks to its being hinged along its lower edge.
- the frame 23 sustains filtering means 22 for the drying air.
- This construction is such as to ensure that, when the drawer 20 is pushed in, ie. closed, the frame 23 abuts against a flange 24 provided at the end of an initial portion 25 of said first conduit 10 and, as a result, the air taken in by the fan is capable to actually and effectively flow through the filtering means 22 which, in view of a greater efficiency and durability thereof, are provided in an inclined arrangement with respect to the air flow.
- the filtering means 22 might also consist of a simple (and unexpensive) paper filter of the dust-bag type used in vacuum cleaners, in a preferred embodiment of the present invention such filtering means 22 consist of a partition of a material (eg. a polypropylene electret) adapted to retain dust particles, associated to an activated-carbon mat adapted to absorb detrimental gaseous substances contained in the air.
- a material eg. a polypropylene electret
- said filtering means 22 can therefore be inspected and, if needed, submitted to the required maintenance, ie. cleaning, regeneration and even replacement, even by the user him/herself (see Figure 2).
- the drier may also be implemented in forms and with details differing from the above described and illustrated ones without departing from the scope of the present invention.
- the drier can have its loading door attached to the top wall of the outer casing.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Drying Of Solid Materials (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
- The present invention refers to a tumble drier for clothes and other items, in particular an exhaust-type tumble drier.
- A tumble drier comprises a substantially parallelepiped outer casing in which there is enclosed a drum that, driven by an electric motor via a driving belt, is adapted to rotate according to a more or less horizontal axis. The items to be dried are loaded in the drum through a door mounted on the front wall or the top wall of said outer casing.
- In an exhaust-type tumble drier, a fan, located inside the outer casing, takes in fresh air from the room in which the appliance is installed and forces it into the drum after it has been duly heated up by electric heating means or gas burners that are also provided inside the outer casing of the appliance. The hot air is forced to flow through the interior of the drum, becomes saturated with the humidity it subtracts from the items loaded in the drum, which are in this way progressively dried, and is finally exhausted from the appliance.
- It is fully apparent that the airborne impurities that are present in the installation room are taken in into the appliance along with the drying air. In particular, since in currently used driers the air intake occurs through apertures provided in the lower portion of the outer casing, eg. through the rear wall, the base of the appliance or even the zone below the loading door when the latter is attached to the front wall, further to such contaminants as cigarette smoke, odours generated during cooking (if the appliance is installed in a kitchen) or even possible airborne germs, ie. germs that can be transmitted by air, particularly significant, among airborne impurities in general, are the dust rolls or clots that form on the floor. In all cases, such impurities eventually come into contact with the items loaded in the drum for drying, and this of course has clear negative effects, in particular if such items are constituted by clothes made of silk, sponge cloth or similar fabrics.
- It would therefore be desirable, and is actually a main purpose of the present invention, to provide means adapted to prevent, in an appliance of the above cited kind, the items to be dried from coming into contact with impurities that are taken in with the drying air from the installation room.
- According to the present invention, such aim is reached in a tumble drier for clothes and other items comprising, inside an outer casing, a rotating drum adapted to be loaded with the items to be dried, heating means as well as means capable of ensuring a forced circulation of air through the drum, means for exhausting the air from the drier after that, inside the drum, it has saturated with the humidity subtracted from the drying items, wherein along the flow-path between the air intake zone of the appliance and the zone at which said air then flows into the drum there are provided means adapted to retain the impurities carried by the air or present in the air taken in from the room in which the appliance is installed.
- The Applicant is of course fully aware of the fact that the use of a filter for the drying air in clothes tumble driers is well-known in the art, for instance from the disclosures in US-A-3 579 851 and WO-A-9508016. This filter, however, is used to the sole purpose of retaining lint and, as a result, it is accordingly arranged in the zone in which the air flows out of the drum.
- In order to enable features and advantages of the present invention to be more readily and clearly understood, a description od a preferred embodiment is given below by way of non-limiting example with reference to the accompanying drawing, in which:
- Figure 1 is a partially see-through view of an exhaust-type clothes tumble drier for household use, in its operating configuration;
- Figure 2 is a similar view as the one appearing in Figure 1, but for the appliance which is illustrated here in its maintenance or cleaning configuration.
- In a largely well-known manner, the tumble drier illustrated in the above cited Figures comprises a substantially parallelepiped outer casing 1 with a
worktop 2, a front panel 3 carrying thecontrol organs 4, 5. Inside the outer casing 1 there is arranged ametal drum 6 that is adapted to be driven rotatably about a more or less horizontal axis X by an electric motor via a drive belt (for reasons of greater simplicity, these last items are not shown in the Figures). As far as the loading and unloading of the items to be dried is concerned, the aperture of thefront flange 7 of thedrum 6 is capable of being closed by arectangular door 8 that is hinged on to the front wall 9 of the outer casing 1. - According to a feature of the present invention, the air is taken in from the room in which the drier is installed by a motor-driven fan (not shown in the Figures, but anyway arranged in the lower front zone of the outer casing 1) through an
intake aperture 21 which is part of a pull-out drawer 20 that is accessible from the front panel 3. The air is forced to flow through a firsthorizontal conduit 10 provided immediately below theworktop 2 and, in a sequence, an electric heating unit 11 and a secondvertical conduit 12 provided therebelow. After having so been heated up, the air is then blown into thedrum 6 through a plurality ofperforations 13 provided in therear flange 14 thereof. Upon becoming saturated with the humidity it removes from the items to be dried (not shown) as it flows across the drum of the drier, the hot air leaves thedrum 6 through an annular aperture which, duly provided with a lint filter, is located on the inside, ie. the liner of thedoor 8. The moisture-laden, hot air is then conveyed through a third conduit (not shown, like the afore cited annular aperture and the lint filter)) up to afinal aperture 15 located in the lowest portion of theleft wall 16 of the outer casing 1. To thisaperture 15 there may be attached a flexible hose (not shown, either) in order to definitively exhaust the air outside the building in which the drier is installed. - The
drawer 20, with theintake aperture 21 for the drying air, occupies in the front panel 3 the same position that is usually occupied by the detergent dispenser drawer in a household washing machine (or, for the matter, the same position as the reservoir provided to collect condensation water in many models of the closed-loop condenser-type clothes driers in use today) and, by taking advantage of an appropriately provided undercut, it can be removed with a single hand that pulls it out in the direction shown by the arrow in Figure 2, eg. for performing the cleaning and maintenance operations described further on. - According to the main feature of the present invention, on the opposite side of the
aperture 21 the box-like body of thedrawer 20 sustains aframe 23 that is capable of swinging thanks to its being hinged along its lower edge. In turn, theframe 23 sustains filtering means 22 for the drying air. - This construction is such as to ensure that, when the
drawer 20 is pushed in, ie. closed, theframe 23 abuts against aflange 24 provided at the end of aninitial portion 25 of saidfirst conduit 10 and, as a result, the air taken in by the fan is capable to actually and effectively flow through thefiltering means 22 which, in view of a greater efficiency and durability thereof, are provided in an inclined arrangement with respect to the air flow. - Although the
intake aperture 21 provided on the front panel 3 for the drying air is practically such as to be able to prevent dust clots or rolls from being sucked into the drier (particularly if the latter is a built-in model), so that the filtering means 22 might also consist of a simple (and unexpensive) paper filter of the dust-bag type used in vacuum cleaners, in a preferred embodiment of the present invention such filtering means 22 consist of a partition of a material (eg. a polypropylene electret) adapted to retain dust particles, associated to an activated-carbon mat adapted to absorb detrimental gaseous substances contained in the air. - Upon simply pulling out said
drawer 20, saidfiltering means 22 can therefore be inspected and, if needed, submitted to the required maintenance, ie. cleaning, regeneration and even replacement, even by the user him/herself (see Figure 2). - From the above description, the most significant advantages of the present invention can therefore be inferred to derive from:
- a) the drying air being cleaned by the filtering means 22 before entering the drum of the drier and coming into contact with the therein loaded items to be dried, which are in this way practically no longer subject to any more or less serious form of contamination due to impurities taken in with the air from the installation room during the drying process;
- b) the short distance from the
intake aperture 21 for the drying air and the heating unit 11 making it possible for the temperature of thedrum 6 and the drying load in the same drum to rise to the desired value and reach steady-state conditions in a much quicker manner, thereby making it possible for the overall duration of the drying cycle to be reduced accordingly; - c) the filtering means 22 being arranged in the
drawer 20 so as to make inspection and any possible cleaning and/or maintenance thereof much more convenient to be carried out; - d) solid particles, eg. dust particles, that may be present in the air taken in from the installation room being effectively prevented from possibly depositing onto the resistance wires of the heating unit 11, thereby eliminating the associated risk of causing the same wires to burn out or the heating unit 11 itself to suffer some damage;
- e) the position of the
air intake aperture 21 in the front panel 3 allowing, if required or considered appropriate, for the use of low-cost filtering means 22. -
- It will be appreciated that, on the basis of the innovatory concept introduced by the present invention, the drier may also be implemented in forms and with details differing from the above described and illustrated ones without departing from the scope of the present invention. In particular, the drier can have its loading door attached to the top wall of the outer casing.
Claims (7)
- Tumble drier for clothes and other items comprising, inside an outer casing (1), a rotating drum (6) adapted to be loaded with the items to be dried, heating means (11) as well as means (10, 12) capable of ensuring a forced circulation of air through the drum (6), means (15) for exhausting the air from the drier after that, inside the drum (6), it has become saturated with the humidity subtracted from the drying items, characterized in that along the flow-path (10) between the air intake zone (21) of the appliance and the zone (13) at which said air then flows into the drum (6) there are provided filtering means (22) adapted to retain the impurities carried by the air or present in the air taken in from the room in which the appliance is installed.
- Tumble drier according to claim 1, characterized in that said filtering means (22) are associated to a user-accessible drawer (20), and are preferably sustained by a frame (23) that is in turn sustained by the box-like body of the drawer.
- Tumble drier according to claim 2, characterized in that said frame (23) and, therefore, also the filtering means (22) are capable of swinging owing to their being hinged on to the box-like body of said drawer (20).
- Tumble drier according to claim 2 or 3, characterized in that the drawer (20) with the filtering means (22) is accessible from the control panel (3) and can be removed from the appliance even by the user.
- Tumble drier according to any of the preceding claims, characterized in that said filtering means (22) consist of a partition plate made of materials that are capable of retaining the solid particles, and associated with a corresponding mat made of materials capable of absorbing the detrimental gaseous substances that may be present in the air.
- Tumble drier according to any of the claims 1 to 4, characterized in that said filtering means (22) consist of a partition plate made of filter paper or the like.
- Tumble drier according to any of the preceding claims, characterized in that said filtering means (22) are arranged in an air conduit (10) extending below the worktop (2) of the outer casing (1) at a short distance from the means (11) provided to heat up the air.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1999PN000001U IT248008Y1 (en) | 1999-01-19 | 1999-01-19 | DRUM LINEN DRYER OF THE EXPLUSION TYPE |
ITPN990001 | 1999-01-19 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1022373A2 true EP1022373A2 (en) | 2000-07-26 |
EP1022373A3 EP1022373A3 (en) | 2000-10-18 |
EP1022373B1 EP1022373B1 (en) | 2004-03-31 |
Family
ID=11395453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99122974A Expired - Lifetime EP1022373B1 (en) | 1999-01-19 | 1999-11-19 | Air-exhaust type clothes tumble drier |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1022373B1 (en) |
DE (1) | DE69916006T2 (en) |
ES (1) | ES2215356T3 (en) |
IT (1) | IT248008Y1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005090669A2 (en) * | 2004-03-16 | 2005-09-29 | Arcelik A.S. | A washer / dryer |
EP1650344A2 (en) * | 2004-10-25 | 2006-04-26 | Samsung Electronics Co., Ltd. | Clothing dryer |
ITTO20110161A1 (en) * | 2011-02-24 | 2012-08-25 | Indesit Co Spa | WASHING MACHINE WITH REMOVABLE FILTER SELECTIVE |
US20120304396A1 (en) * | 2011-06-02 | 2012-12-06 | General Electric Company | Overnight cycle for horizontal axis clothes washer |
WO2016162232A1 (en) * | 2015-04-06 | 2016-10-13 | Arcelik Anonim Sirketi | A laundry washing and drying machine comprising a filter |
EP3839126A1 (en) * | 2019-12-19 | 2021-06-23 | Arçelik Anonim Sirketi | A washing machine comprising a filter |
US12031255B2 (en) | 2021-10-25 | 2024-07-09 | Whirlpool Corporation | Front load all-in-one washer/dryer combo reverse airflow system |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3467187B1 (en) | 2017-10-09 | 2021-12-22 | Whirlpool Corporation | Filter configured for being used in a machine for drying laundry and machine for drying laundry equipped with such a filter |
DE102018208559A1 (en) * | 2018-05-30 | 2019-12-05 | BSH Hausgeräte GmbH | Filter device for a laundry treatment machine and laundry treating machine with such |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2644246A (en) * | 1951-12-27 | 1953-07-07 | Gen Electric | Clothes drier lint trap |
GB2262595A (en) * | 1991-12-16 | 1993-06-23 | Merloni Elettrodomestici Spa | Laundry washing and drying machine |
DE19542597A1 (en) * | 1995-11-15 | 1997-05-22 | Bosch Siemens Hausgeraete | Laundry dryer |
US5822883A (en) * | 1996-12-04 | 1998-10-20 | White Consolidated Industries, Inc. | Exhaust air particulate contamination sensing for tumbler dryers |
-
1999
- 1999-01-19 IT IT1999PN000001U patent/IT248008Y1/en active
- 1999-11-19 DE DE69916006T patent/DE69916006T2/en not_active Expired - Lifetime
- 1999-11-19 ES ES99122974T patent/ES2215356T3/en not_active Expired - Lifetime
- 1999-11-19 EP EP99122974A patent/EP1022373B1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2644246A (en) * | 1951-12-27 | 1953-07-07 | Gen Electric | Clothes drier lint trap |
GB2262595A (en) * | 1991-12-16 | 1993-06-23 | Merloni Elettrodomestici Spa | Laundry washing and drying machine |
DE19542597A1 (en) * | 1995-11-15 | 1997-05-22 | Bosch Siemens Hausgeraete | Laundry dryer |
US5822883A (en) * | 1996-12-04 | 1998-10-20 | White Consolidated Industries, Inc. | Exhaust air particulate contamination sensing for tumbler dryers |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005090669A2 (en) * | 2004-03-16 | 2005-09-29 | Arcelik A.S. | A washer / dryer |
WO2005090669A3 (en) * | 2004-03-16 | 2006-03-16 | Arcelik As | A washer / dryer |
EP1650344A2 (en) * | 2004-10-25 | 2006-04-26 | Samsung Electronics Co., Ltd. | Clothing dryer |
EP1650344A3 (en) * | 2004-10-25 | 2009-01-14 | Samsung Electronics Co., Ltd. | Clothing dryer |
ITTO20110161A1 (en) * | 2011-02-24 | 2012-08-25 | Indesit Co Spa | WASHING MACHINE WITH REMOVABLE FILTER SELECTIVE |
WO2012114269A1 (en) * | 2011-02-24 | 2012-08-30 | Indesit Company S.P.A. | Washing machine with selectively extractable filter |
US20120304396A1 (en) * | 2011-06-02 | 2012-12-06 | General Electric Company | Overnight cycle for horizontal axis clothes washer |
WO2016162232A1 (en) * | 2015-04-06 | 2016-10-13 | Arcelik Anonim Sirketi | A laundry washing and drying machine comprising a filter |
EP3839126A1 (en) * | 2019-12-19 | 2021-06-23 | Arçelik Anonim Sirketi | A washing machine comprising a filter |
US12031255B2 (en) | 2021-10-25 | 2024-07-09 | Whirlpool Corporation | Front load all-in-one washer/dryer combo reverse airflow system |
Also Published As
Publication number | Publication date |
---|---|
ES2215356T3 (en) | 2004-10-01 |
EP1022373B1 (en) | 2004-03-31 |
DE69916006T2 (en) | 2004-10-28 |
ITPN990001U1 (en) | 2000-07-19 |
EP1022373A3 (en) | 2000-10-18 |
IT248008Y1 (en) | 2002-12-09 |
DE69916006D1 (en) | 2004-05-06 |
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