EP2032757A1 - Machine à laver à tambour et procédé de commande pour celle-ci - Google Patents

Machine à laver à tambour et procédé de commande pour celle-ci

Info

Publication number
EP2032757A1
EP2032757A1 EP07729542A EP07729542A EP2032757A1 EP 2032757 A1 EP2032757 A1 EP 2032757A1 EP 07729542 A EP07729542 A EP 07729542A EP 07729542 A EP07729542 A EP 07729542A EP 2032757 A1 EP2032757 A1 EP 2032757A1
Authority
EP
European Patent Office
Prior art keywords
temperature
drying
tub
unit
heating
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
Application number
EP07729542A
Other languages
German (de)
English (en)
Other versions
EP2032757B1 (fr
Inventor
Ye Lv
Xiu Wan
Ping Ye
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2032757A1 publication Critical patent/EP2032757A1/fr
Application granted granted Critical
Publication of EP2032757B1 publication Critical patent/EP2032757B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/16—Washing liquid temperature
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/12—Humidity or dryness of laundry
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/28—Electric heating
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/30—Blowers
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/36—Condensing arrangements, e.g. control of water injection therefor
    • 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 

Definitions

  • the present invention relates to a drum washing machine and a method of controlling the same, and, more particularly, to a drum washing machine with a drying function or a drum washer-dryer and a method of controlling a drying program therein.
  • Drum washing machines are popular with users due to their water saving feature and avoidance of damage to the laundry.
  • drum washing machines with drying function also known as washer- dryers
  • drum washing machine takes in air through a fan set on an outside of a tub containing the drum, heats the air with a heater, and then transfers the heated air to the tub and the inside of the drum.
  • the heated air exchanges heat with the water contained in the laundry and takes away the moisture.
  • the moisture is then condensed in a condensing unit mounted on an outside of the tub and drained out of the washing machine.
  • the existing washing machines with drying function typically dry the laundry at a substantially constant temperature and in a preset period of time.
  • such kind of control method tends to overdry the laundry when the load of laundry to be dried is small and to underdry the laundry when the load of laundry is large. Therefore, it can hardly meet users' needs in general.
  • the washing machine will determine the degree of dryness based on the signals sent from the sensors and thus achieve relatively accurate control over the drying effect.
  • GB 2 082 742 A provides a dryer which controls the drying time according to the internal temperature change rate in combination with considering the type of clothes being washed and predetermined degree of dryness.
  • CN 1 746 379 A discloses a drum washing machine with drying function which has an upper temperature sensor and a lower temperature sensor mounted respectively on an upper end and a lower end of a vertical part of a hot air circulating pipe, and which has a control unit that determines a degree of dryness reached based on the difference between temperature detected by the upper and lower temperature sensors, and thereby controls the drying process.
  • CN 1 503 864 A discloses a control unit for detecting the dryness in an air exhaust dryer and a control method for using the same.
  • the control unit disclosed determines the degree of dryness of the wash based on the signals detected by a humidity detection unit and a temperature detection unit and thereby controls the drying process.
  • CN 1 61 1 659 A discloses a drum washing machine system control device, which determines the load of the laundry to be dried according to data obtained by a humidity sensor set on a condensing pipe, and a drying device for drum washing machines which adjusts a temperature of a heater based on a laundry load, and a control method for the same.
  • the technologies disclosed in the above-mentioned documents pertain to configure sensors for the system so that the system can make judgment according to signals detected by the sensors and control the drying process.
  • every sensor will inevitably have a certain error depending on its accuracy, installation location, and other factors.
  • the result detected by the temperature sensor may not be accurate due to the effect of the condensed water.
  • the accuracy of the result detected by the temperature sensor in the said CN 1 61 1 659 A will also be affected by the condensed water during the condensing process.
  • the present invention is intended to provide a drum washing machine with a drying program, the drum washing machine comprising a tub to hold water, a drum rotatably set in the tub, a heating drying tunnel configured outside said tub, a first temperature detection unit mounted in said tub, and a system control unit for controlling the drying program based on signals fed back from the said first temperature detection unit.
  • said heating drying tunnel is provided with a second heating unit and a second temperature detection unit, and the said system control unit controls said second heating unit based on a signal fed back from the said second temperature detection unit to prevent said heating drying tunnel from damage by over- temperature of the second heating unit.
  • the outlet of said heating drying tunnel is connected with said tub to lead the air heated by said second heating unit into the inside of the tub and the drum so that the laundry is dried by heat exchange between the heated air and the moisture contained in the laundry.
  • a fan is provided at an appropriate location inside the heating drying tunnel. Said fan draws the air into the heating drying tunnel through the inlet of said heating drying tunnel, and then transports the air heated by said second heating unit to the inside of the tub and drum.
  • said drum washing machine further comprises a condensing unit and a pump, whereby the high-temperature and low-humidity air heated by the said second heating unit having taken away the moisture contained in the laundry after heat exchange and been converted into low-temperature and high-humidity air is drained out of the tub and drum.
  • the low-temperature and high-humidity air after being condensed by the condensing water in the said condensing unit, will be separated from the condensate obtained and recirculated to the drum, and the condensate obtained pumped to the outside or a collector through the said pump.
  • said tub is provided with a first heating unit so that it will heat water during the washing process to improve washing efficiency.
  • the said system control unit relies on the said first temperature detection unit to control the said first heating unit to prevent damage to the wash due to excessively high water temperature during washing.
  • the said first temperature detection unit and the said second temperature detection unit are temperature sensors, and are preferably NTC (Negative Temperature Coefficient) temperature sensors to enhance detection accuracy.
  • NTC Negative Temperature Coefficient
  • Another objective of the present invention is to provide a control method for a drying program of a drum washing machine.
  • Said drum washing machine comprises a tub, a rotatable drum set in the tub, a heating drying tunnel configured outside said tub, a first temperature detection unit mounted in said tub and a system control unit.
  • the said control method comprises the following step: a drying phase, during which a temperature is detected by the said first temperature detection unit and a corresponding temperature signal is transferred to the system control unit; the system control unit comparing temperatures and controlling the drying program based on the comparison results.
  • said control method further comprises a step being a preheating phase, during which a temperature inside said drum is heated to a preset preheating temperature and the system control unit determines a weight of the laundry based on the time spending in raising the temperature to the preheating temperature, as the weight of the laundry is in direct proportion to the time required for heating to the preheating temperature.
  • the system control unit compares the current temperature of the drum with a preset drying termination temperature. When the current temperature is higher than or equal to the said drying termination temperature, the drying phase is completed; otherwise, the drying process continues.
  • the system control unit compares the current temperature of the drum with a minimum temperature for the drying phase. When the difference between the current temperature and the minimum temperature for the drying phase is greater than or equal to a preset reference temperature and the said current temperature is greater than or equal to the said drying termination temperature, the drying phase is completed; otherwise, the drying process continues.
  • a condensing unit and a pump are further provided outside the tub and a second heating unit, a second temperature detection unit and a fan are further provided at respective appropriate locations inside the said heating drying tunnel, and the said control method further comprises a step being a cooling phase during which the system control unit controls the second heating unit to stop working while controlling the said fan, condensing unit, and pump to work as usual during the drying step.
  • the said cooling phase preferably lasts for a preset period of time.
  • said tub is further provided in the inside with a first heating unit which heats the water during the washing process.
  • the system control unit controls said first heating unit based on the signal fed back from said first temperature detection unit.
  • said first temperature detection unit and said second temperature detection unit are temperature sensors, and are preferably NTC temperature sensors to enhance the accuracy of detection signal.
  • the present invention achieves control over the drying process through the first temperature detection unit set in the tub. Furthermore, said first temperature detection unit can also be used to control the heating by the first heating unit during the washing process. This means that the same temperature detection unit addresses two different functional requirements. This not only effectively reduces drying control error but also cuts production costs and simplifies the system control program since no additional sensor is needed.
  • FIG. 1 is a structural diagram of the drum washing machine with a drying program of the present invention
  • FIG. 2 is a temperature change curve detected by the first temperature detection unit when the load is equal to or more than the normal wash load
  • FIG. 3 is a temperature change curve detected by the first temperature detection unit when the load is less than the normal wash load.
  • FIG. 4 is a drying flow chart of the drum washing machine with a drying program.
  • the washing machine mainly comprises a tub 1 , which is used to hold water and is housed in an enclosure (not shown in the figure) of the washing machine through a support device (not shown in the figure) and a suspension device (not shown in the figure), a drum 2 which is rotatably set in the tub 1 for washing the laundry and is provided with through holes which allow passage of water and air, and a system control unit (not shown in the figure).
  • the drum 2 rotates when driven by a drive unit (not shown in the figure) on the rear of the tub 1 and lifts the laundry to a certain height through lifting devices (not shown in the figure) configured in the drum 2, and then the laundry falls due to gravity. This combined with the action of the water and detergent completes the washing process.
  • a first heating unit 10 is configured inside the lower part of the tub 1 , which heats the water to a certain temperature during the washing process to increase the cleaning ability of the washing water and enhance the washing effect.
  • the system control unit controls said first heating unit 10 based on the signal fed back from the first temperature detection unit 1 1 , which is an NTC temperature sensor or other temperature detector and configured near said first heating unit 10 to prevent any damage to the laundry caused by excessively high water temperature.
  • a heating drying tunnel 4 is configured outside the said tub 1 , for example, on the top and the inlet 41 of the heating drying tunnel 4 is connected with the outlet of a condensing unit 5.
  • Said condensing unit 5 is configured in the vertical direction outside the tub 1 , with its inlet connected with the tub 1.
  • a fan 42 is set in an appropriate location inside the heating drying tunnel 4 to force air into the heating drying tunnel 4.
  • a second heating unit 40 is provided inside the heating drying tunnel 4 at the far end from the condensing unit 5 to heat the inlet air into high- temperature and low-humidity hot air.
  • a second temperature detection unit 43 for example, NTC temperature sensor or other temperature detector, is configured near the second heating unit 40.
  • the system control unit controls the second heating unit 40 based on a signal fed back from the second temperature detection unit 43 to prevent any damage to the heating drying tunnel 4 caused by excessively high temperature.
  • the outlet 44 of the heating drying tunnel 4 is connected with the tub 1 so that the high-temperature and low-humidity hot air is transferred to the inside of the tub 1 and drum 2.
  • the hot air will exchange heat with the moisture contained in the laundry in the inner drum 2, carry away the moisture, and change into low-temperature and high-humidity air.
  • the moisture in the said low-temperature and high-humidity air will be condensed into water and drained out of the washing machine or into a removable container through the pump 6 configured on the bottom of the outer drum 1. This cycle repeats until the laundry is dried.
  • the drying program When the drying program starts, it enters a preheating phase.
  • the fan 42 will draw air into the heating drying tunnel 4, and the second heating unit 40 will heat the air to any desired temperature.
  • the heated high-temperature and low-humidity air will be transferred to the tub 1 and drum 2 by the fan 42 to exchange heat with moisture contained in the laundry.
  • the air will then change into low-temperature and high-humidity air.
  • the system control unit determines whether the preheating phase is completed based on the fact that the current temperature T curren t of the heating drying tunnel is equal to or greater than the preheating temperature T d ⁇ faU ⁇ t.
  • the preheating temperature T def auit varies with different types of clothes contained in the laundry.
  • the preheating temperature T defau ⁇ t is set to 78°C; in the case of chemical fibre clothes, the preheating temperature T defau ⁇ t is set to 66 0 C. If the current temperature T current is equal to or greater than the preheating temperature T defau ⁇ t , the preheating phase is completed. Meanwhile, the system control unit records the time f taken by the second heating unit 40 to heat the air to the preheating temperature T defau ⁇ t , and then determines whether the laundry is less than, more than, or equal to the normal laundry load W 0 according to the time t.
  • the drying program Upon completion of the preheating phase, the drying program will enter a drying phase under the control of the system control unit.
  • the fan 42 and the second heating unit 40 continue to work to transfer the heated high-temperature and low- humidity air to the tub 1 and drum 2.
  • the temperature change curve of the tub 1 and drum 2 detected by the first temperature detection unit 1 1 is shown in FIG. 3. Since the laundry load is light and the moisture contained in the laundry is low, the temperature change is not great even after heat exchange between the high-temperature and low-humidity air and the moisture contained in the laundry and it is a slowly rising process.
  • the first temperature detection unit 1 1 detects the current temperature T curren t inside the drum and feeds it to the system control unit.
  • the system control unit has a preset termination temperature T term ⁇ n aii which depends on the materials of clothes contained in the laundry. In the case of cotton fabric, the termination temperature T te rm ⁇ naii is set to 85°C; in the case of chemical fibres, the termination temperature T te rm ⁇ naii is set to 71 0 C.
  • the system control unit compares the current temperature T curren t with the preset termination temperature Ttermman- When the current temperature T curren t is equal to or greater than the preset termination temperature T term ⁇ n aii, the second heating unit 40 stops working and the drying phase is completed; otherwise, the drying process continues.
  • the temperature change curve for the tub 1 and drum 2 detected by the first temperature detection unit 1 1 is shown in FIG. 3. Since the load is large and the moisture contained in the laundry is high, the temperature will first drop at the beginning of the heat exchange between the high-temperature and low-humidity air and the moisture contained in the laundry. As the heat exchange progresses, the moisture contained in the laundry reduces and the temperature will gradually rise. At this phase, the first temperature detection unit 1 1 detects the current temperature T current inside the drum 2 and feeds it back to the system control unit.
  • the system control unit has a reference temperature T ref e r e n ce, which is preferably set to 6°C.
  • the system control unit compares the current temperature T curren t with the preset termination temperature T ter m ⁇ nai2-
  • the termination temperature T ter m ⁇ nai2 depends on the materials of the clothes being washed. In the case of cotton fabric, the termination temperature T ter minai2 is set to 78°C; in the case of chemical fibres, the termination temperature T, erm ⁇ n ai 2 is set to 68°C.
  • the system control unit checks whether the difference ⁇ T between the current temperature T current and the minimum temperature for the drying phase is equal to or greater than the reference temperature T h e n ce- When the current temperature T curren t is equal to or greater than the preset termination temperature T termm ai 2 and the said temperature difference ⁇ T is equal to or greater than the reference temperature Treference, the drying phase is completed; otherwise, the drying process continues.
  • the drying program Upon completion of the drying phase, the drying program enters the cooling phase.
  • the system continuously introduces cool air into the drum 2 for a certain period time to cool the laundry down.
  • the second heating unit 40 stops working while the fan 42, the condensing unit 5, and the pump 6 continue to work.
  • the cooling phase lasts for a certain period of time Tde f auit, for example, 10 minutes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

L'invention concerne une machine à laver à tambour ayant un programme de séchage et concerne également un procédé de commande pour celle-ci, ladite machine à laver à tambour comportant une cuve (1) pour contenir l'eau, un tambour (2) placé de manière rotative dans la cuve, un tunnel de séchage chauffant (4) configuré à l'extérieur de ladite cuve, un premier module de détection de température (11) se trouvant dans ladite cuve et un module de commande du système permettant de commander ledit programme de séchage en fonction des signaux renvoyés par ledit premier module de détection de température.
EP07729542.6A 2006-05-31 2007-05-25 Procédé de commande pour un lave-linge séchant Active EP2032757B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2006100407564A CN101082161B (zh) 2006-05-31 2006-05-31 设有烘干程序的滚筒洗衣机及其控制方法
PCT/EP2007/055116 WO2007138019A1 (fr) 2006-05-31 2007-05-25 Machine à laver à tambour et procédé de commande pour celle-ci

Publications (2)

Publication Number Publication Date
EP2032757A1 true EP2032757A1 (fr) 2009-03-11
EP2032757B1 EP2032757B1 (fr) 2016-07-20

Family

ID=38336836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07729542.6A Active EP2032757B1 (fr) 2006-05-31 2007-05-25 Procédé de commande pour un lave-linge séchant

Country Status (3)

Country Link
EP (1) EP2032757B1 (fr)
CN (2) CN101082161B (fr)
WO (1) WO2007138019A1 (fr)

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US11060226B2 (en) 2019-01-10 2021-07-13 Lg Electronics Inc. Laundry treating apparatus having induction heater and control method thereof

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CN101082161B (zh) * 2006-05-31 2013-10-09 博西华电器（江苏）有限公司 设有烘干程序的滚筒洗衣机及其控制方法
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CN103088607A (zh) * 2011-11-04 2013-05-08 博西华电器（江苏）有限公司 洗衣干衣机
US20130145644A1 (en) 2011-12-13 2013-06-13 Bsh Home Appliances Corporation Process for operating a washer dryer with a sensor placed between a tub and a heat exchanger, and related washer dryer
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CN102704238B (zh) * 2012-06-13 2015-02-04 无锡小天鹅股份有限公司 一种滚筒洗衣机烘干判断方法
KR20150081602A (ko) 2014-01-06 2015-07-15 삼성전자주식회사 세탁 건조기 및 그 제어방법
CN106555320B (zh) * 2015-09-30 2021-11-16 青岛海尔洗衣机有限公司 一种干衣机及烘干方法
CN109402988B (zh) * 2017-08-16 2022-02-22 青岛海尔洗涤电器有限公司 烘干系统控制方法及衣物处理装置
CN110130044A (zh) * 2018-02-09 2019-08-16 青岛海尔滚筒洗衣机有限公司 一种衣物处理设备及其控制方法
KR102525026B1 (ko) 2018-02-23 2023-04-24 엘지전자 주식회사 세탁기 및 세탁기의 제어방법
CN110699909A (zh) * 2018-07-10 2020-01-17 青岛海尔洗衣机有限公司 一种衣物处理系统的控制方法
CN110791935B (zh) * 2018-07-16 2023-03-28 青岛海尔洗涤电器有限公司 一种衣物烘干方法及衣物处理设备
CN110685112A (zh) * 2019-10-24 2020-01-14 长虹美菱股份有限公司 自动烘干方法在滚筒洗衣干衣机上的应用
CN111101356B (zh) * 2019-12-26 2022-12-09 青岛海尔洗衣机有限公司 干衣设备的控制方法
KR20220056144A (ko) * 2020-10-27 2022-05-04 엘지전자 주식회사 의류처리장치

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CN101680153B (zh) 2012-08-08
CN101082161A (zh) 2007-12-05
WO2007138019A1 (fr) 2007-12-06
CN101680153A (zh) 2010-03-24
CN101082161B (zh) 2013-10-09
EP2032757B1 (fr) 2016-07-20

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