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Laundry machine

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Publication number
US20090078007A1
US20090078007A1 US12155681 US15568108A US2009078007A1 US 20090078007 A1 US20090078007 A1 US 20090078007A1 US 12155681 US12155681 US 12155681 US 15568108 A US15568108 A US 15568108A US 2009078007 A1 US2009078007 A1 US 2009078007A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
water
steam
generator
drum
valve
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.)
Abandoned
Application number
US12155681
Inventor
Sang Hun Bae
Chul Jin Choi
Ju Han Yoon
Tae Hee Lee
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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

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Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines in so far as such details are not special to washing machines of groups D06F21/00 - D06F25/00 or to any particular type of washing machine defined in groups D06F9/00 - D06F19/00 or D06F27/00
    • D06F39/008Steam generating arrangements
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry driers
    • D06F58/02Domestic laundry driers having drier drums rotating about a horizontal axis
    • D06F58/04Details

Abstract

A laundry machine is disclosed. The laundry machine includes a drum in which laundry is put, a steam generator to generate steam, a water supply line connected to the steam generator, a steam line connected to the steam generator, and a valve placed in the steam line, wherein the valve is controlled to block the steam line to prevent water from flowing from the steam generator to the drum.

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • [0001]
    This application claims the benefit of Korean Patent Application No. 10-2007-0096565, filed on Sep. 21, 2007, which is hereby incorporated by reference in its entirety.
  • BACKGROUND OF THE INVENTION
  • [0002]
    1. Field of the Invention
  • [0003]
    The present invention relates to a laundry machine to wash or dry laundry. The laundry machine includes a washing machine, a dryer, a drying and washing machine or the like. Recently, the laundry machine includes a steam generator. The present invention relates more particularly to a laundry machine having a steam generator.
  • [0004]
    2. Discussion of the Related Art
  • [0005]
    Generally, washing machines include a pulsator type washing machine and a drum washing machine. Further, the washing machines also include a drying and washing machine which can perform both washing and drying.
  • [0006]
    A dryer is an electric home appliance which generally dries washed laundry, mainly, clothes using high-temperature air. The dryer generally includes a drum which accommodates the laundry therein, a driving device which drives the drum, a heating unit which heats air introduced into the drum, a blower unit to make the heated air to flow into the drum, and the like.
  • [0007]
    The dryers are classified into an electric dryer and a gas-type dryer according to an air heating method, i.e., a heating unit. The electric dryer heats air using electric resistance heat, and the gas-type dryer heats air using heat generated by gas combustion. In another way, the dryers can be classified into a condensation dryer and an exhaust dryer. In the condensation dryer, humid air which has been heat-exchanged with the laundry in the drum is circulated without being discharged to the outside, and the humid air is converted into condensed water in a separate condenser by heat exchange with outside air to be discharged to the outside. In the exhaust dryer, humid air which has been heat-exchanged with the laundry in the drum is directly discharged out of the dryer.
  • [0008]
    A conventional laundry machine may include a steam generator. A washing machine using steam in the washing operation has a good washing performance.
  • SUMMARY OF THE INVENTION
  • [0009]
    When water is supplied into the steam generator over a required level, water may overflow through a steam line. Particularly, when water is supplied into the steam generator through a faucet and a water supply valve, if the water supply valve is out of order, water can continuously flow into the steam generator, thereby causing overflow. In case of a dryer, overflowing water may be introduced into the drum and wet the laundry. Further, since the dryer generally does not have a drain line for discharging water out of a drum or a tub, differently from the washing machine, the problem becomes worse.
  • [0010]
    Also in the washing machine, water can overflow the steam generator due to an error in the water supply to flow into the tub, thereby causing a problem.
  • [0011]
    The present invention is related to a laundry machine that substantially obviates one or more problems due to limitations and disadvantages of the related art.
  • [0012]
    Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the invention. The objectives and other advantages of the invention can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
  • [0013]
    An embodiment of the present invention comprises a drum in which laundry is put; a steam generator to generate steam; a water supply line connected to the steam generator; a steam line connected to the steam generator; and a valve placed in the steam line, wherein the valve is controlled to block overflowing water from the steam generator.
  • [0014]
    In the above embodiment, water can be prevented from flowing to the drum through the steam line.
  • [0015]
    The water supply line can be connected to a faucet and a water supply valve. In this case, even though water is over supplied to the steam generator due to a malfunction of the water supply valve or the like, the water does not flow into the drum by the valve installed on the steam line. However, when water is intended to be supplied to the drum through the steam line after passing through the steam generator, the valve installed on the steam line can be controlled according to the conditions.
  • [0016]
    The valve installed on the steam line can be controlled according to a temperature of the steam generator. In this case, the temperature of the steam generator can be one of a temperature of a body of the steam generator, a temperature of atmosphere in the steam generator, and a temperature of water in the steam generator.
  • [0017]
    When the temperature of the steam generator is equal to or larger than a preset temperature, the valve installed on the steam line can be controlled to be kept open. For example, the valve installed on the steam line which maintains a closed state can be controlled to be opened when the temperature of the steam generator reaches 100° C. When water is over supplied to the steam generator and overflows the steam generator, the temperature of the steam generator would be lower than the preset temperature. In this case, since the valve installed on the steam line is in a closed state, overflowing water does not flow into the drum through the steam line.
  • [0018]
    Meanwhile, the valve installed on the steam line can be controlled to be opened after a predetermined period of time after the heater of the steam generator is turned on, instead of being controlled according to a temperature as described above.
  • [0019]
    In this case, the valve installed on the steam line can be controlled to be closed at the same time when the water supply valve is closed as water supply into the steam generator is completed. Even though the water supply valve is not closed due to a malfunction, water is not introduced into the drum by being blocked by the valve installed on the steam line.
  • [0020]
    Further, the valve installed on the steam line can be controlled according to an amount of water to be supplied into the steam generator. For example, if the amount of water supplied into the steam generator is equal to or larger than a preset amount, the valve is controlled to be closed. In this case, the preset amount can be set to be equal to or larger than an allowable water supply amount of the steam generator. Further, the preset amount can be set to be larger than a set amount by which water is supplied into the steam generator.
  • [0021]
    The laundry machine can further include an instrument to measure an amount of water supplied into the steam generator. The instrument can be any device capable of detecting an amount of water supplied into the steam generator.
  • [0022]
    For example, the instrument can include an impeller installed on the water supply line and a detection unit to detect the number of rotation of the impeller. Accordingly, if the impeller rotates by a preset number or more, the valve installed on the steam line is closed.
  • [0023]
    Further, the instrument can include a water level sensor which senses a water level in the steam generator. The water level sensor senses a maximum allowable water level of the steam generator. If the maximum allowable water level is sensed by the water level sensor, the valve installed on the steam line can be controlled to be closed. In this case, the maximum allowable water level can be determined as a water level over which water is supplied to cause overflow through the steam line.
  • [0024]
    The water level sensor can be configured to sense another preset level in the steam generator. For example, the water level sensor can be configured to sense a first water level, a second water level and the maximum allowable water level. If a water level reaches the second water level, the water supply valve is controlled to be closed. The first water level is provided to prevent the heater installed in the steam generator from being exposed above the surface of the water. For example, if a water level in the steam generator gradually decreases and then reaches the first water level, the heater can be controlled to be turned off in order to prevent from being overheated.
  • [0025]
    Further, the valve installed on the steam line can be controlled according to time. For example, the valve can be controlled to be closed within a preset period of time after the water supply valve is closed as water supply into the steam generator is completed and, then, opened after a preset period of time.
  • [0026]
    According to the present invention, even though water is over-supplied to the steam generator, the water can be prevented from flowing into the drum. Particularly, even when there is an error in the water supply, the water can be prevented from overflowing the steam generator and flowing into the drum.
  • [0027]
    It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0028]
    The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:
  • [0029]
    FIG. 1 illustrates a laundry machine according to an embodiment of the present invention;
  • [0030]
    FIG. 2 illustrates a cross-sectional view of the laundry machine shown in FIG. 1; and
  • [0031]
    FIG. 3 illustrates an enlarged configuration view showing essential portions of the laundry machine shown in FIG. 1.
  • DETAILED DESCRIPTION OF THE INVENTION
  • [0032]
    Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
  • [0033]
    Hereinafter, a laundry machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. For convenience, a top-loading, electric, condensation dryer is explained as an example, but the present invention is not limited thereto.
  • [0034]
    A rotatable drum 20, a motor 70 which drives the drum 20 and a belt 68 are installed inside a cabinet 10 forming an external appearance of the dryer. Further, a heater 90 (hereinafter, simply referred to as a “hot air heater”) which heats air to produce high-temperature air (hereinafter, referred to as “hot air”) and a hot air supply duct 44 which supplies hot air produced in the hot air heater 90 to the drum 20 are installed at specific positions of the cabinet 10. Further, an exhaust duct 80 which discharges humid air that has been heat-exchanged with laundry in the drum 20, and a blower unit 60 which sucks the humid air are installed in the cabinet 10. Meanwhile, a steam generator 200 is installed at a specific position of the cabinet 10 to generate high-temperature steam. Although an indirect drive type dryer which rotates the drum 20 using the motor 70 and the belt 68 is shown and described in this embodiment, the present invention is not limited thereto. That is, a direct drive type dryer which directly rotates the drum 20 by a motor directly connected to the rear surface of the drum 20 can be applied to the present invention.
  • [0035]
    The respective components are described in detail below.
  • [0036]
    The cabinet 10 forming an external appearance of the dryer includes a base 12 forming a bottom surface, a pair of side covers 14 vertically installed on the base 12, a front cover 16 and a rear cover 18 respectively installed on the front and rear surfaces of the side covers. 14, and a top cover 17 positioned at an upper portion of the side covers 14. A control panel 19 having various control switches and the like is generally disposed on the top cover 17 or the front cover 16. A door 164 is installed on the front cover 16. The rear cover 18 includes a suction port 182 which introduces outside air and an exhaust hole 184 serving a final passage to discharge air in the drum 20 to the outside.
  • [0037]
    An inner space of the drum 20 serves as a drying chamber to perform a drying operation, and the drum 20 has a lift 22 therein.
  • [0038]
    Meanwhile, a front supporter 30 and a rear supporter 40 are installed between the drum 20 and the cabinet 10 (the front cover 16 and the rear cover 18). The drum 20 is rotatably installed between the front supporter 30 and the rear supporter 40. Sealing members (not shown) are installed between the front supporter 30 and the drum 20 and between the rear supporter 40 and the drum 20, respectively, to prevent leakage. That is, the front supporter 30 and the rear supporter 40 close the front and rear surfaces of the drum 20 to form the drying chamber and serve to support a front end and a rear end of the drum 20.
  • [0039]
    An opening is formed on the front supporter 30 such that the drum 20 communicates with the outside of the dryer. The opening is selectively opened and closed by the door 164. Further, a lint duct 50 serving as a passage for discharging air of the drum 20 to the outside is connected to the front supporter 30, and a lint filter 52 is installed in the lint duct 50. The lint duct 50 is connected to one side of the blower unit 60, and the other side of the blower unit 60 is connected to the exhaust duct 80. The exhaust duct 80 communicates with the exhaust hole 184 disposed on the rear cover 18. Accordingly, when the blower unit 60 is operated, air in the drum 20 is discharged to the outside through the lint duct 50, the exhaust duct 80 and the exhaust hole 184. In this case, foreign matter such as nap is filtered by the lint filter 52. Generally, the blower unit 60 includes a blower 62 and a blower housing 64, and the blower 62 is connected to and driven by the motor 70 for driving the drum 20. An opening 42 generally having a number of through holes is formed on the rear supporter 40. The opening 42 is connected to the hot air supply duct 44. The hot air supply duct 44 communicates with the drum 20 to serve as a passage for supplying hot air to the drum 20. Accordingly, the hot air heater 90 is installed at a specific position of the hot air supply duct 44.
  • [0040]
    Meanwhile, the steam generator 200 is installed at a specific position of the cabinet 10 to generate steam and supply the steam into the drum 20. The steam generator 200 is described in detail below with reference to FIG. 3.
  • [0041]
    The steam generator 200 includes a water tank 210 for accommodating water therein, a heater 240 mounted in the water tank 210, a water level sensor 260 which measures a water level of the steam generator 200, and a temperature sensor 270 which measures a temperature of the steam generator 200. The water level sensor 260 includes a common electrode 262, a low water level electrode 264 and a high water level electrode 266. The water level sensor 260 detects a high water level and a low water level according to whether the common electrode 262 is electrically connected to the high water level electrode 266 or whether the common electrode is electrically connected to the low water level electrode 264.
  • [0042]
    A water supply hose 220 for supplying water is connected to one side of the steam generator 200 and a steam hose 230 for discharging steam is connected to the other side of the steam generator 200. It is preferable to provide a nozzle 250 at a leading end of the steam hose 230. A faucet and a water supply valve 281 are connected to one end of the water supply hose 220. A leading end portion of the steam hose 230 or the nozzle 250, that is, a steam discharge port, is disposed at a specific position of the drum 20 to spray steam into the drum 20. Although the nozzle 250 is disposed at the front of the drum 20 in this embodiment, the nozzle 250 can be installed on the rear supporter 40.
  • [0043]
    Further, a valve 282 is installed on the steam hose 230. A controller opens the water supply valve 282 to supply water to the steam generator 200. When it is determined that the water level in the steam generator 200 reaches a high water level based on a signal of the water level sensor 260, the controller closes the water supply valve 282. In this case, the valve 282 installed on the steam hose is also closed.
  • [0044]
    Then, the controller turns on the heater 240 to heat water in the steam generator 200. As time goes by, when an inner temperature of the steam generator 200 increases and reaches a preset temperature, the valve 282 installed on the steam hose 230 is opened. The steam generated in the steam generator 200 is supplied to the drum 20 through the steam hose 230.
  • [0045]
    Meanwhile, a flowmeter can be installed on the water supply hose to detect an amount of water supplied into the steam generator. Generally, the flowmeter is a conventional well-known impeller flowmeter. The amount of water supplied through the water supply hose is detected using the rotation number of the impeller. The controller receives a signal of the flowmeter and closes the water supply valve when the amount of water reaches a preset amount.
  • [0046]
    Further, the water level sensor can be used. For example, if a high water level is sensed by a high water level terminal of the water level sensor, the valve installed on the steam hose is closed. In another way, a terminal capable of sensing a water level higher than the water level sensed by the high water level terminal (so-called ‘critical water level terminal’) can be further provided and used. If a critical water level is sensed by the critical water level terminal, the valve of the steam hose is closed. In this case, the critical water level can be set as a maximum allowable water level of the steam generator.
  • [0047]
    The present invention relates to a laundry machine to wash or dry the laundry. According to the present invention, even though water is excessively supplied to the steam generator and overflow is generated, it is possible to prevent the water from flowing into the drum. Particularly, even when there is an error in the water supply, it is possible to prevent water from overflowing the steam generator and flowing into the drum.
  • [0048]
    It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (11)

1. A laundry machine comprising:
a drum in which laundry is placed;
a steam generator to generate steam;
a water supply line through which water is supplied to the steam generator;
a steam line through which the generated steam is supplied to the drum; and
a valve positioned in the steam line, wherein the valve is controlled between an open and closed position such that when the valve is in the closed position, the valve prevents communication between the steam generator and the drum.
2. The laundry machine of claim 1, wherein the water supply line is connected to a water supply valve and the water supply valve is connected to a faucet.
3. The laundry machine of claim 1, wherein the valve is controlled based on a temperature of the steam generator.
4. The laundry machine of claim 3, wherein the valve is controlled to the open position when the temperature reaches a preset temperature.
5. The laundry machine of claim 4, wherein the valve is controlled to the closed position when an amount of water supplied to the steam generator reaches a preset amount.
6. The laundry machine of claim 2, wherein the valve is controlled to closed position within a preset period of time after the water supply valve is closed and the valve is controlled to the open position when a temperature of the steam generator reaches a preset temperature.
7. The laundry machine of claim 1, wherein the valve is controlled based on an amount of water supplied to the steam generator.
8. The laundry machine of claim 7, further comprising an instrument to measure an amount of water flowing through the water supply line.
9. The laundry machine of claim 8, wherein the instrument includes an impeller flowmeter.
10. The laundry machine of claim 9, wherein the valve is controlled to the closed position when a rotation number of an impeller of the impeller flowmeter reaches a preset number.
11. The laundry machine of claim 8, wherein the instrument comprises a sensor to sense a water level of the steam generator.
US12155681 2007-09-21 2008-06-06 Laundry machine Abandoned US20090078007A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR20070096565A KR20090030899A (en) 2007-09-21 2007-09-21 Laundry machine
KR10-2007-0096565 2007-09-21

Publications (1)

Publication Number Publication Date
US20090078007A1 true true US20090078007A1 (en) 2009-03-26

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US12155681 Abandoned US20090078007A1 (en) 2007-09-21 2008-06-06 Laundry machine

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KR (1) KR20090030899A (en)
CN (1) CN101392449A (en)
EP (1) EP2039824B1 (en)

Cited By (11)

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Publication number Priority date Publication date Assignee Title
US20080000098A1 (en) * 2006-02-20 2008-01-03 Choi Chul J Drying machine and method for controlling the same
US20080141554A1 (en) * 2006-12-15 2008-06-19 Lg Electronics Inc. Laundry machine
US20080168679A1 (en) * 2007-01-12 2008-07-17 Lg Electronics Inc. Laundry machine and control method thereof
US20080217243A1 (en) * 2007-03-06 2008-09-11 Yoo Sang-Hee Method for cleaning foreign materials filtering apparatus
US20080216518A1 (en) * 2007-03-06 2008-09-11 Yoo Sang-Hee Foreign materials filtering apparatus and washing machine having the same
US20080216519A1 (en) * 2007-03-06 2008-09-11 Yoo Sang-Hee Foreign materials filtering apparatus and washing machine having the same
US20090265953A1 (en) * 2006-06-12 2009-10-29 Lg Electronics Inc. Laundry dryer and method for controlling the same
US7926310B2 (en) 2007-03-06 2011-04-19 Lg Electronics Inc. Foreign materials filtering apparatus and washing machine having the same
US7941937B2 (en) * 2002-11-26 2011-05-17 Lg Electronics Inc. Laundry dryer control method
US8020413B2 (en) 2007-03-06 2011-09-20 Lg Electronics Inc. Foreign materials filtering apparatus and washing machine having the same
US20140223970A1 (en) * 2013-02-13 2014-08-14 Lg Electronics Inc. Laundry machine and control method of the same

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CN105603688A (en) * 2015-12-30 2016-05-25 浙江欧莱科机电制造有限公司 Control system of washing machine water treater

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Cited By (20)

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Publication number Priority date Publication date Assignee Title
US7941937B2 (en) * 2002-11-26 2011-05-17 Lg Electronics Inc. Laundry dryer control method
US20090277035A1 (en) * 2006-02-20 2009-11-12 Lg Electronics Inc. Drying machine and method for controlling the same
US8931186B2 (en) 2006-02-20 2015-01-13 Lg Electronics Inc. Drying machine and method for controlling the same
US20080000098A1 (en) * 2006-02-20 2008-01-03 Choi Chul J Drying machine and method for controlling the same
US9206542B2 (en) 2006-02-20 2015-12-08 Lg Electronics Inc. Drying machine and method for controlling the same
US20090265953A1 (en) * 2006-06-12 2009-10-29 Lg Electronics Inc. Laundry dryer and method for controlling the same
US8424220B2 (en) 2006-06-12 2013-04-23 Lg Electronics Inc. Laundry dryer and method for controlling the same
US20080141554A1 (en) * 2006-12-15 2008-06-19 Lg Electronics Inc. Laundry machine
US7987616B2 (en) * 2006-12-15 2011-08-02 Lg Electronics Inc. Laundry machine
US20080168679A1 (en) * 2007-01-12 2008-07-17 Lg Electronics Inc. Laundry machine and control method thereof
US7997006B2 (en) * 2007-01-12 2011-08-16 Lg Electronics Inc. Laundry machine and control method thereof
US7926310B2 (en) 2007-03-06 2011-04-19 Lg Electronics Inc. Foreign materials filtering apparatus and washing machine having the same
US7882715B2 (en) * 2007-03-06 2011-02-08 Lg Electronics Inc. Method for cleaning foreign materials filtering apparatus
US8020413B2 (en) 2007-03-06 2011-09-20 Lg Electronics Inc. Foreign materials filtering apparatus and washing machine having the same
US8033144B2 (en) 2007-03-06 2011-10-11 Lg Electronics Inc. Foreign materials filtering apparatus and washing machine having the same
US8037721B2 (en) 2007-03-06 2011-10-18 Lg Electronics Inc. Foreign materials filtering apparatus and washing machine having the same
US20080217243A1 (en) * 2007-03-06 2008-09-11 Yoo Sang-Hee Method for cleaning foreign materials filtering apparatus
US20080216519A1 (en) * 2007-03-06 2008-09-11 Yoo Sang-Hee Foreign materials filtering apparatus and washing machine having the same
US20080216518A1 (en) * 2007-03-06 2008-09-11 Yoo Sang-Hee Foreign materials filtering apparatus and washing machine having the same
US20140223970A1 (en) * 2013-02-13 2014-08-14 Lg Electronics Inc. Laundry machine and control method of the same

Also Published As

Publication number Publication date Type
CN101392449A (en) 2009-03-25 application
EP2039824B1 (en) 2014-01-22 grant
EP2039824A3 (en) 2009-06-17 application
KR20090030899A (en) 2009-03-25 application
EP2039824A2 (en) 2009-03-25 application

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