WO2010071377A2 - 건설기계의 냉각장치 - Google Patents
건설기계의 냉각장치 Download PDFInfo
- Publication number
- WO2010071377A2 WO2010071377A2 PCT/KR2009/007583 KR2009007583W WO2010071377A2 WO 2010071377 A2 WO2010071377 A2 WO 2010071377A2 KR 2009007583 W KR2009007583 W KR 2009007583W WO 2010071377 A2 WO2010071377 A2 WO 2010071377A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic
- oil
- switching valve
- flow
- hydraulic line
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0875—Arrangement of valve arrangements on superstructures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/04—Pump-driving arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/04—Pump-driving arrangements
- F01P5/043—Pump reversing arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/044—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives
Definitions
- the present invention relates to a cooling device for a construction machine, and more particularly, to a cooling device for cooling a radiator and an oil cooler of a construction machine by a cooling fan.
- construction machinery such as wheel loaders or fork lanes forcibly suck external air through a cooling fan to cool the radiator and the oil cooler disposed in front of it.
- a cooling fan to cool the radiator and the oil cooler disposed in front of it.
- the hydraulic motor driving the cooling fan is always rotated in one direction (forward rotation)
- dust is attached to the radiator and the worker should periodically perform cleaning.
- a device has been used to switch the direction of rotation of the hydraulic motor through a switching valve to reverse the cooling fan to remove dust accumulated by the blowing of the cooling fan.
- Korean Patent No. 840044 owned by the applicant discloses a cooling fan drive control device for heavy construction equipment.
- the disclosed drive control device includes a hydraulic pump, a hydraulic motor driven by pressure oil supplied through a hydraulic line from the hydraulic pump, and a cooling fan driven by a hydraulic motor, wherein the hydraulic motor is operated by forward rotation or reverse rotation. It is composed of a motor, on the hydraulic line connected to the hydraulic motor from the hydraulic pump is configured to include a switching valve for switching the supply direction of the hydraulic oil, and the switching valve electrical switch.
- the present invention has been made to solve the above problems of the prior art, and an object of the present invention is to provide a cooling device for a construction machine that enables a plurality of cooling fans to simultaneously change the direction by a single switching valve. .
- the present invention is to provide a cooling device for a construction machine to automatically replenish the pressure to the pressure drop region generated in the rear of the hydraulic motor when the direction change.
- Cooling apparatus of the construction machine according to the present invention for achieving the object as described above is capable of forward and reverse rotation corresponding to the supply direction of the pressure oil, and rotates the cooling fan (20a, 20b) connected to each Two or more hydraulic motors 30a and 30b;
- a switching valve 40 for changing the rotational direction of the two or more hydraulic motors by switching the supply direction of the hydraulic oil supplied from the hydraulic pump 60 to the two or more hydraulic motors 30a and 30b;
- a flow replenishment valve for controlling a separate flow rate supplied upstream of the two or more hydraulic motors when a pressure drop occurs upstream of the two or more hydraulic motors 30a and 30b based on the supply direction of the hydraulic oil. makeup valve) 50a, 50b.
- the flow supplement valves (50a, 50b) is provided with two or more to supplement the flow rate to each of the pressure drop region of the two or more hydraulic motors (30a, 30b).
- the two or more flow supplement valves 50a and 50b receive a flow rate from the oil tank 70, and at least one 50a of the two or more flow supplement valves is the hydraulic pump 60 and the switching. It is installed on the hydraulic line (L1) for connecting the valve 40 and the hydraulic line (L4) for connecting the oil tank (70).
- hydraulic line (L2) for guiding the pressure oil drained from the switching valve 40 to the oil tank may be further included, and at least one (50a) of the two or more flow supplement valve is installed hydraulic line ( L4) is a hydraulic line connecting a hydraulic line L2 connecting the switching valve 40 and the oil tank and a hydraulic line L1 connecting the hydraulic pump 60 and the switching valve 40 to each other. .
- the two or more flow supplement valves (50a, 50b) may be supplied with a flow rate from the oil tank 70, at least one (50b) of the two or more flow supplement valves is the oil tank 70 and the It can be installed on the hydraulic line (L5) for connecting two or more hydraulic motors (30a, 30b).
- the hydraulic line (L2) for guiding the pressure oil drained from the switching valve 40 to the oil tank may be further included, and at least one (50b) of the two or more flow fill valves are installed L5 is connected to the hydraulic line (L2) for connecting the switching valve 40 and the oil tank and the hydraulic line (L3) for interconnecting the two or more hydraulic motors (30a, 30b).
- the plurality of cooling fans have the effect of enabling the direction change of the forward and reverse rotation at the same time by a single switching valve.
- FIG. 1 is a hydraulic circuit diagram when a plurality of cooling fans in the forward rotation of the cooling device of a construction machine according to an embodiment of the present invention.
- FIG. 2 is a hydraulic circuit diagram when a plurality of cooling fans in the reverse rotation in the cooling device of the construction machine according to an embodiment of the present invention.
- Figure 3 is a hydraulic circuit diagram showing the flow of replenishment oil at stop after forward rotation in the cooling device of the construction machine according to an embodiment of the present invention.
- Figure 4 is a hydraulic circuit diagram showing the flow of replenishment oil at the stop after the reverse rotation in the cooling device of the construction machine according to an embodiment of the present invention.
- FIG. 1 illustrates a hydraulic circuit diagram when a plurality of cooling fans rotates forward in a cooling apparatus of a construction machine according to an embodiment of the present invention
- FIG. 2 illustrates a hydraulic circuit diagram when reverse rotation is performed.
- a radiator and an oil cooler 10 are basically provided to two cooling fans 20a and 20b.
- the writer and the oil cooler 10 may be arranged laterally to be individually cooled by each cooling fan 20a or 20b, or may be arranged in front and rear to be simultaneously cooled by two cooling fans 20a and 20b.
- the two cooling fans 20a and 20b are respectively driven by two hydraulic motors 30a and 30b, and the two hydraulic motors 30a and 30b are connected in series by hydraulic lines.
- a single switching valve 40 is provided on the hydraulic line connected to the hydraulic motors 30a and 30b from the hydraulic pump 60.
- the switching valve 40 switches the supply direction of the hydraulic oil and sequentially supplies the two hydraulic motors 30a and 30b to convert the rotation directions of the hydraulic motors 30a and 30b into forward rotation or reverse rotation.
- the switching valve 40 is a solenoid type having a solenoid portion 41 on one side to receive a control signal from the control unit 90.
- the switching valve 40 is supplied with a flow rate by the hydraulic pump 60 driven by the engine or the electric motor.
- the hydraulic pump 60 has a swash plate 61 and has a configuration in which the flow rate discharged according to the angle of the swash plate 61 is variable.
- the flow rate is controlled by the control unit 90, the control unit 90 receives the temperature signal from the temperature sensor mounted on the radiator and the oil cooler 10 to adjust the rotational speed of the cooling fans (20a, 20b) required based on this. Control the flow rate by judging.
- the control unit 90 also transmits a forward or reverse rotation signal to the switching valve 40 via the solenoid unit 41.
- the reverse rotation signal for cleaning may be set to detect reverse contamination of the radiator and the like 10 so that the reverse rotation drive occurs automatically when it exceeds a predetermined level, or may be set to occur periodically at predetermined time intervals. On the other hand, it may be configured so that the reverse rotation drive occurs manually by a separate external operation switch.
- An adjusting unit 80 is mounted between the control unit 90 and the hydraulic pump 60 to adjust the supply flow rate by adjusting the angle of the swash plate 61 of the hydraulic pump 60.
- the adjusting unit 80 may be configured to detect the actual flow rate supplied from the hydraulic pump 60 to feedback control the pressure of the hydraulic pump 60.
- Two makeup valves 50a and 50b are provided at the front end of the switching valve 40.
- the two flow supplement valves 50a and 50b pull up the hydraulic oil from the oil tank 70 to replenish the flow rate to each pressure drop region of the two hydraulic motors 30a and 30b.
- the first flow supplement valve 50a connects the first hydraulic line L1 and the oil tank 70 and the switching valve 40 to connect the hydraulic pump 60 and the switching valve 40. Is mounted between the second hydraulic line (L2). That is, the first flow supplement valve 50a is installed on the hydraulic line L4 connecting the first hydraulic line L1 and the second hydraulic line L2.
- the second flow supplement valve 50b is the third hydraulic pressure connecting the second hydraulic line (L2) and the two hydraulic motors (30a, 30b) connecting the oil tank 70 and the switching valve 40 It is mounted between the lines L3. That is, the second flow supplement valve 50b is installed on the hydraulic line L5 connecting the second hydraulic line L2 and the third hydraulic line L2.
- FIG 3 is a hydraulic circuit diagram showing the flow of the replenishment oil when stopped after the forward rotation in the cooling device of the construction machine according to an embodiment of the present invention
- Figure 4 is a hydraulic circuit diagram showing the flow of replenishment oil when stopped after the reverse rotation.
- the replenishment oil is distributed left and right in the drawing by two flow supplement valves 50a and 50b so that the left flow ( ⁇ ⁇ ) is supplied to the rear of the first hydraulic motor 30a via the switching valve 40 and the right side.
- the flow ( ⁇ ⁇ ) is supplied to the rear of the second hydraulic motor 30a via a separate supply line.
- the supply of replenishment oil to the rear of each of the hydraulic motors 30a and 30b eliminates the instantaneous pressure difference inside the motor and prevents damage to the mechanism.
- the replenishment oil is distributed left and right in the drawing by two flow supplement valves 50a and 50b so that the left flow ( ⁇ ⁇ ) is supplied to the rear of the second hydraulic motor 30b via the switching valve 40 and the right side.
- Flow (->) is supplied to the rear of the first hydraulic motor (30a) via a separate supply line.
- the supply of replenishment oil to the rear of each of the hydraulic motors 30a and 30b eliminates the instantaneous pressure difference inside the motor and prevents damage to the mechanism.
- the present invention can be applied to any construction machine driven by a hydraulic fan, as well as excavators or wheel loaders.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
Description
Claims (6)
- 건설기계의 냉각장치에 있어서,압유의 공급 방향에 대응하여 정회전 및 역회전이 가능하며, 그 각각에 연결된 냉각팬(20a, 20b)을 회전구동시키는 2개 이상의 유압모터(30a, 30b);유압펌프(60)로부터 상기 2개 이상의 유압모터(30a, 30b)에 공급되는 압유의 공급 방향을 절환시킴으로써 상기 2개 이상의 유압모터의 회전방향을 변경시키는 절환밸브(40); 및상기 압유의 공급방향을 기준으로 상기 2개 이상의 유압모터(30a, 30b)의 상류에서 압력강하가 발생될 경우 상기 2개 이상의 유압모터의 상류에 공급되는 별도의 유량을 단속하는 유량보충밸브 (makeup valve)(50a, 50b);를 포함하는 건설기계의 냉각장치.
- 제1항에 있어서,상기 유량보충밸브(50a, 50b)는 2개 이상으로 구비되어 상기 2개 이상의 유압모터(30a, 30b)의 각 압력 강하 영역에 각각 유량을 보충하는 것인 건설기계의 냉각장치.
- 제2항에 있어서,상기 2개 이상의 유량보충밸브(50a, 50b)는 오일탱크(70)로부터 유량을 공급받으며,상기 2개 이상의 유량보충밸브 중 적어도 하나(50a)는, 상기 유압펌프(60)와 상기 절환밸브(40)를 연결하는 유압라인(L1)과 상기 오일탱크(70)를 연결하는 유압라인(L4)상에 설치되는 것을 특징으로 하는 건설기계의 냉각장치.
- 제 3 항에 있어서,상기 절환밸브(40)로부터 드레인되는 압유를 상기 오일탱크로 안내하는 유압라인(L2)을 더 포함하며,상기 2개 이상의 유량보충밸브 중 적어도 하나(50a)가 설치되는 유압라인(L4)은, 상기 절환밸브(40)와 상기 오일탱크를 연결하는 유압라인(L2)과 상기 유압펌프(60)와 상기 절환밸브(40)를 연결하는 유압라인(L1)을 연결하는 유압라인인 것을 특징으로 하는 건설기계의 냉각장치.
- 제2항에 있어서,상기 2개 이상의 유량보충밸브(50a, 50b)는 오일탱크(70)로부터 유량을 공급받으며,상기 2개 이상의 유량보충밸브 중 적어도 하나(50b)는 상기 오일탱크(70)와 상기 2개 이상의 유압모터(30a, 30b)를 연결하는 유압라인(L5)상에 설치되는 것을 특징으로 하는 건설기계의 냉각장치.
- 제 5 항에 있어서,상기 절환밸브(40)로부터 드레인되는 압유를 상기 오일탱크로 안내하는 유압라인(L2)을 더 포함하며,상기 2개 이상의 유량보충밸브 중 적어도 하나(50b)가 설치되는 유압라인(L5)은, 상기 절환밸브(40)와 상기 오일탱크를 연결하는 유압라인(L2)과 상기 2개 이상의 유압모터(30a, 30b)를 상호 연결시키는 유압라인(L3)을 연결시키는 것을 특징으로 하는 건설기계의 냉각장치.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09833655.5A EP2390423B1 (en) | 2008-12-18 | 2009-12-18 | Cooling device for construction machinery |
CN200980151398.6A CN102257220B (zh) | 2008-12-18 | 2009-12-18 | 工程机械的冷却装置 |
US13/140,524 US8579595B2 (en) | 2008-12-18 | 2009-12-18 | Cooling device for construction machinery |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2008-0129039 | 2008-12-18 | ||
KR1020080129039A KR101527218B1 (ko) | 2008-12-18 | 2008-12-18 | 건설기계의 냉각장치 |
Publications (2)
Publication Number | Publication Date |
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WO2010071377A2 true WO2010071377A2 (ko) | 2010-06-24 |
WO2010071377A3 WO2010071377A3 (ko) | 2010-08-19 |
Family
ID=42269254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2009/007583 WO2010071377A2 (ko) | 2008-12-18 | 2009-12-18 | 건설기계의 냉각장치 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8579595B2 (ko) |
EP (1) | EP2390423B1 (ko) |
KR (1) | KR101527218B1 (ko) |
CN (1) | CN102257220B (ko) |
WO (1) | WO2010071377A2 (ko) |
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CN103459726A (zh) * | 2011-03-15 | 2013-12-18 | 日立建机株式会社 | 工程机械 |
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KR101752503B1 (ko) * | 2011-01-12 | 2017-06-30 | 두산인프라코어 주식회사 | 휠로더의 유압 펌프 제어 방법 |
WO2014192172A1 (ja) * | 2013-09-19 | 2014-12-04 | 株式会社小松製作所 | 作業車両 |
GB2521350B (en) * | 2013-12-06 | 2016-01-27 | Jaguar Land Rover Ltd | Vehicle cooling system |
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US10006334B2 (en) | 2016-04-29 | 2018-06-26 | Caterpillar Inc. | Hydraulic driven fan system |
CN106050816B (zh) * | 2016-06-30 | 2018-06-26 | 中联重科股份有限公司渭南分公司 | 液压散热控制方法、装置和系统 |
US11286843B2 (en) | 2019-08-20 | 2022-03-29 | Engineered Machined Products, Inc. | System for fan control |
GB2592989B (en) * | 2020-03-13 | 2022-07-13 | Caterpillar Sarl | Flow sharing control for multiple hydraulic fan motors |
US11560826B2 (en) * | 2020-08-15 | 2023-01-24 | Kubota Corporation | Working machine |
CN112177091A (zh) * | 2020-10-14 | 2021-01-05 | 徐州徐工矿业机械有限公司 | 一种液压挖掘机用独立散热系统及控制方法 |
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2009
- 2009-12-18 WO PCT/KR2009/007583 patent/WO2010071377A2/ko active Application Filing
- 2009-12-18 EP EP09833655.5A patent/EP2390423B1/en active Active
- 2009-12-18 CN CN200980151398.6A patent/CN102257220B/zh active Active
- 2009-12-18 US US13/140,524 patent/US8579595B2/en active Active
Patent Citations (1)
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KR100840044B1 (ko) | 2001-12-31 | 2008-06-19 | 두산인프라코어 주식회사 | 건설중장비의 냉각팬 구동제어장치 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102605822A (zh) * | 2011-01-20 | 2012-07-25 | 斗山英维高株式会社 | 重型设备的冷却扇-制动器控制方法 |
CN103459726A (zh) * | 2011-03-15 | 2013-12-18 | 日立建机株式会社 | 工程机械 |
CN103459726B (zh) * | 2011-03-15 | 2016-06-01 | 日立建机株式会社 | 工程机械 |
Also Published As
Publication number | Publication date |
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KR20100070479A (ko) | 2010-06-28 |
EP2390423A4 (en) | 2014-03-26 |
WO2010071377A3 (ko) | 2010-08-19 |
EP2390423A2 (en) | 2011-11-30 |
EP2390423B1 (en) | 2017-04-19 |
CN102257220B (zh) | 2015-04-15 |
US20120057989A1 (en) | 2012-03-08 |
CN102257220A (zh) | 2011-11-23 |
KR101527218B1 (ko) | 2015-06-10 |
US8579595B2 (en) | 2013-11-12 |
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