CN102427831B - 改进的空气净化装置和方法 - Google Patents
改进的空气净化装置和方法 Download PDFInfo
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- CN102427831B CN102427831B CN201080021405.3A CN201080021405A CN102427831B CN 102427831 B CN102427831 B CN 102427831B CN 201080021405 A CN201080021405 A CN 201080021405A CN 102427831 B CN102427831 B CN 102427831B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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- H05H1/00—Generating plasma; Handling plasma
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Abstract
本发明涉及一种用于空气净化的设备,该设备包括具有空气入口(4)和空气出口(6)以及在空气出入口之间的空气通道(2)的壳体(1),用于引导空气流穿过壳体的装置(20),壳体包括非热能等离子体单元(30)、紫外线发射装置(40)和臭氧分解催化剂(42),所述非热能等离子体包括阳极(32)、介电体(32)和阴极(33),所述阴极采用网状罩的形式,所述网状罩围绕所述紫外线发射装置和所述臭氧分解催化剂以形成反应室和法拉第笼。非热能等离子体单元也可以设为形成单元阵列的柱状单元,所述介电体可包括水滴以改进所述装置的效率。
Description
技术领域
本发明涉及一种用于空气和表面净化的改进装置。
背景技术
空气纯净和能够一直去除空气中携带的污染物是非常重要的,尤其是在被认为是无菌或者卫生的环境下,比如医院和厨房。在医生手术室以及工作环境中具有净化的空气也是有好处的,其使细菌和疾病难以传播。
除微生物污染物之外,作为工业加工的副产品或作为恐怖主义或化学战的恶意攻击,化学气体或蒸汽能造成严重的危险。
申请人较早的专利(EP1799330)提供一种有效的方法,并且活性组分是羟基(OH),羟基作为氧化种类仅次于氟,但其优点是对高等生物没有明显的毒性、而对致病菌和病毒是致命的。
由于相关的对流层组分(主要是臭氧和不饱和烃)的存在,因此对流层空气中的羟基浓度很高。这些组分在室内空气中消失或被大量减少,所以导致羟基的浓度相应较低。申请人早先的发明再造室内对流层条件以增加羟基的数量,所述羟基用于降低室内或封闭环境内有害污染物(特别是致病菌和病毒)的水平。
同时申请人早先的发明的过程和装置已发现能高效地在室内再造一个室外环境,总是有用于增强效率和可靠性的空间。
发明内容
本发明的一个目标是提供一种用于空气和表面净化的改进设备。
根据本发明的第一方面,提供一种用于净化空气的设备,该设备包括壳体,壳体具有空气入口和空气出口、以及在空气入口和空气出口之间的空气通道,用于引导空气流穿过壳体的装置,壳体包括非热能等离子体单元、紫外线发射装置和臭氧分解催化剂,非热能等离子体包括阳极、介电体和阴极,阴极采用网状罩的形式,所述网状罩围绕紫外线发射装置和臭氧分解催化剂以形成反应室和法拉第笼。
优选地,在壳体内反应室的下游设置烃发射器,优选邻近或者靠近出口。
替换性地或者另外地,设有优选为喷雾器形式的水滴发射器,以将去离子水的超精细喷雾输送到反应室内。可以理解的是,烃发射器和水滴发射器可以连接到具有合适的输送机构的适当源容器。
壳体还可包括用于给反应室发送某个波长的微波的装置,比如磁控管。这就不需要为紫外线发射装置提供分开的电源电路。
优选在入口处或者入口附近设有用于引导空气经过通道的风扇或者叶轮。
阳极优选包括网状的导体或半导体元件,比如碳铝合成物。介电体可以是任何合适的非导电材料或绝缘体。在一个优选实施例中,介电体包括激活的氧化铝颗粒(alumina pellet)。所述材料可以涂覆催化材料。在本发明的替换实施例中,介电体包括去离子水滴或蒸汽。
为此,提供一种用于净化空气的设备,所述设备包括壳体,壳体具有空气入口和空气出口、以及在空气入口和空气出口之间的空气通道,用于引导空气流通过壳体的装置,壳体包括非热能等离子体单元、紫外线发射装置和臭氧分解催化剂,非热能等离子体包括阳极、介电体和阴极,介电体包括去离子水滴或蒸汽。
阴极优选包括导电材料制成的多孔网,其形成用于围绕UV发射装置和催化剂的笼状结构。优选地,阴极还容纳有用于发送特定波长的微波以激活UV发射装置的微波发射器。优选地,微波发射器产生的波长在2000-2600MHz的射频范围内,比如2450MHz。
优选的是,催化剂围绕UV发射装置。优选地,UV发射装置是管状的,并且被臭氧催化装置的网所围绕。优选地,在网上的涂层形成催化剂。
在笼子和UV发射器/催化剂之间、和/或在发射器和催化剂之间设置有合适的支承件。支承元件优选涂覆有作为反应催化剂的材料,并被构形为给通过反应室的空气施加涡旋运动。
可以以交替的形式提供用于设备的等离子体单元以提高装置的效率。介电体用精细的去离子水滴(优选具有通常为18MΩ/cm的最小电阻)来代替,使得空气输送系统的背压最小化,从而减少所需的能量和噪音,并且还提高OH·基的产量。
为此,本发明的第三方面是提供一种用于空气净化设备的非热能等离子体单元,等离子体单元包括阳极、阴极以及阳极和阴极之间的介电体,介电体包括去离子水滴或蒸汽。
可以理解的是,所述单元应当具有给阳极的合适电源。优选地,阴极接地。
优选地,根据本发明第三方面的非热能等离子体单元的阴极包括导电材料制成的空心管。阳极优选设置在所述管内,与形成阴极的壁隔开,从而在它们之间形成介电空间。更优选地,阳极固定在所述管的中间。
优选地,水容器被连接到介电空间。设有用于向容器输送空气的空气入口。可以设有用于在所述空间内提供精细的水滴雾的喷雾器。优选设有合适的空气运动装置(比如风扇)以将水滴推进介电空间。
等离子体单元还可以设有另一个空气入口用于将来自可替代空气源的空气(比如来自周围环境的空气)输送到介电空间。同样,可设有空气运动装置以辅助该输送。
可以理解的是,根据本发明第三方面的等离子体单元可以设在空气净化装置内,该空气净化装置包括具有空气入口和空气出口以及在空气入口和空气出口之间的空气通道的壳体,用于引导空气流穿过壳体的装置,壳体包含有非热能等离子体单元、紫外线发射装置和臭氧分解催化剂。
根据本发明的第四方面,提供一种包括柱状单元的非热能等离子体单元,所述柱状单元具有阴极包围的阳极、以及在阴极和阳极之间的介电体。
优选地,阴极形成柱的壁。所述柱可以是任何三维形状但是优选为圆柱形。可替代地,所述柱可以是具有至少五个侧面的多边形。优选地,所述多边形是正多边形。
优选的是,阴极包括导电材料制成的网,其围绕设在阴极和阳极之间的介电体。任何非导电的材料可用于介电体,但是优选是激活的氧化铝颗粒或去离子水滴。
合适的电源应当被提供给阳极,并且阴极优选接地。
单独的柱单元可以被布置成阵列以形成扩大的非热能等离子体。所述阵列可以包含进空气净化装置中以向待净化的空气的通过提供等离子场,所述等离子场具有降低的阻碍空气流动的背压。
为此,本发明的第五方面提供一种非热能等离子体单元的阵列,所述阵列包括多个非热能等离子体单元。所述非热能等离子体单元阵列可以设在空气净化装置中,该空气净化装置包括具有空气入口和空气出口以及在空气入口和空气出口之间的空气通道的壳体,用于引导空气流穿过壳体的装置,壳体包含有非热能等离子体单元的阵列、紫外线发射装置和臭氧分解催化剂。
所述阵列优选包括多个根据本发明第四方面的柱单元的行,相邻行彼此交错。构成阵列的单独的单元可以以足以保持单独单元中非热能等离子体的频率被顺序开关,即使是单元在短时间内没有电源。这种顺序的开关可以通过现有技术中任何合适的装置获得,比如使用机电的或固态的专有汽车分布技术(automotive distributiontechnology)。
优选地是,容纳等离子体单元阵列的外壁是绝缘的,例如通过诸如硅橡胶的分层结构。
可选地,可以在阵列内或者围绕阵列设置隔板以帮助空气流过所述阵列。
附图说明
参考下列附图,本发明将被更详细地说明,其中:
图1示出根据本发明第一方面的空气净化装置的纵向剖视图;
图2是图1中所示装置的横向剖视图;
图3a是根据本发明另一方面的非热能等离子体单元的示意图;
图3b是沿图3a中A-A的横向剖视图;
图4是根据本发明再一个方面的非热能等离子体单元的阵列的纵向剖视俯视图;
图5是图4中所示阵列的单个等离子体单元的垂直剖视图;
图6是图4中所示的非热能等离子体单元阵列的局部端部示意图。
具体实施方式
参考附图1和2,示出根据本发明第一方面的空气净化装置,所述空气净化装置包括具有流动通道2的壳体1、进入流动通道2的空气入口4和离开通道2的空气出口6。设置风扇或叶轮20形式的空气流发生器用于驱使空气穿过壳体1。作为安全措施,格栅(未示出)横跨空气入口4设置防止在运行中意外接触到叶轮。电源(未示出)可以是一种专有产品,但是应当能提供12-25Kv,10-30KHz的功率。
图1中整体用30标示的非热能等离子体过滤器包括阳极或高压电极31,介电体32,和既作为阴极又作为反应室端部的笼状多孔网33。
阳极31包括网状(三维多孔)导电元件,在该情况下是碳铝合成物。但是,可以使用任何刚性网状的导电或者半导电材料。介电体32是激活的氧化铝颗粒,标称直径为3到4毫米。但是,同样地,介电体32可以是任何合适的材料以适于不同的应用场合和特定的要求。介电体可以包括不导电的多孔泡沫基质和/或可以涂覆有催化材料。催化剂可以针对特定化合物或化合物组的破坏来选择。阴极33包括导电材料的多孔网,比如展开的不锈钢网,其基本上沿着壳体的内轮廓以形成空心笼子。这能作为“法拉第笼”用于屏蔽外部静电场,并且只允许某个波长的辐射进入笼内。所述笼子具有UV催化材料的内部涂层,在该情况下是锐钛型二氧化钛(Anatase form Titanium dioxide)。
由阴极33形成的笼子包含紫外线辐射发射装置40,所述紫外线辐射发射装置40包括被光催化元件42围绕的紫外线管。笼子还收纳有连接到磁控管62的微波发射器60。另外,排出喷嘴或喷孔70设在笼子中,所述笼子连接到去离子水容器72用于输送去离子水75的精细喷雾。
图1中整体用50标示的烃发射器设在法拉第笼的下游邻近或者靠近壳体1的出口6。烃发射器50包括可再装料(rechargeable)的烃容器55,所述烃容器55含有液体芳烃,例如,诸如萜烯的烯烃。烃发射器50的输送系统包括穿过步进马达53的螺纹杆52。所述杆穿过容器55推动活塞54以驱使烃经过管56并离开喷洒头57。但是,可以理解的是,也可以使用其他适合给空气流供应挥发芳烃的设备。
空气净化装置可以由主电源单独供电,由可充电电池组单独供电,或者可以由两种电源选择性地供电。
空气净化装置能以便携式装置的形式生产,并且采用小公文包大小或基本上小公文包大小的尺寸。或者,空气净化装置能被生产为较大的装置,所述较大的装置意欲在安装后就保持在一个位置上。后一种装置更适合但不限于工业或商业设施和场所。
使用中,空气净化装置被放置在待净化的地方。所述装置意欲净化建筑物、腔室、罩、管道、管件、通道或者其他封闭或基本封闭区域内的空气。但是,在具有足够的通流能力的情况下,其还能净化开放外部环境中的空气。
装置被供电,风扇20沿着壳体1的通道2产生环境空气流,如图1中箭头所示。空气流最初遇到形成非热能等离子体过滤器的阳极31、介电体32和阴极33。过滤器利用非热能等离子体的特性在介电体核心内使空气的组成成分“等离子化”。一般来说,构成空气的元素(主要是氧和氮)的原子结构中的外环电子被由非热能等离子体产生的强电场(通常是20KHz下10Kv)“激活”。被激励的电子通过碰撞释放能量。但是,由于电子的非实体质量且随后没有发生离子化,因此不会发出热量或发出很少的热量。释放出的能量足以在空气流中产生自由基,比如O+和OH-。自由基是强氧化剂,并且将烃、有机气体和通常PM2.5(2.5×10-6米)及以下的粒子(比如细菌、病毒、孢子、酵母霉菌和臭气)氧化。只有大部分的惰性元素或化合物能抗氧化。
因为具有零蒸汽压力,所以通过在整个或者部分非热能等离子体的介电材料上设置分子厚度催化涂层,氧化反应的很多产物是临时的和表面作用的,因此,能够在非热能等离子体内针对特殊的分子和化合物(例如神经毒气剂)进行氧化。
非热能等离子体过滤器30所产生的其中一个副产物是臭氧。臭氧的半衰期依赖于大气条件,并且,本身是强氧化剂的臭氧在普通环境下离开等离子体核心很久后会在空气中继续反应。这对于由人操作的装置和附近有人的装置来说是不能接受的。所以,等离子体过滤器的阴极所形成的法拉第笼收纳被臭氧催化装置的网42所围绕的UV光线发射管40。UV光线发射管内的水银被具有固定或可变输出的磁控管62所产生的兆赫频率的微波激活。通常在254和313纳米波长处为峰值的紫外辐射用于分解空气流中携带的臭氧。网42上的涂层催化该分解。使用微波来激活UV光线省却给UV管供电的分开电路,由此减少部件的复杂性和数量。
微波还用于激活由于烃氧化在等离子体单元的排放物中存在的水分子,这还有利于提高等离子体单元的效率。这要求阴极部件的网33足够宽,以允许微波能量穿过笼子进入等离子体单元。另外,众所周知的是,该频率的微波增大非热能等离子场的强度,由此用于提高装置的总体效率。
从容器72引入去离子水雾75(可选的)足以将经过装置的空气的相对湿度增大到大于90%。这用于增加羟基(OH·)的产量,并且降低等离子体单元的排放物中自由臭氧和氮氧化物(NOx)的浓度。去离子水应具有18.2MΩ/cm或大约18.2MΩ/cm的电阻。在过程的该阶段增加OH·自由基的数量会增加反应的动力路径中后续阶段的效率,由此降低空气中所述过程排放臭氧的需要。
双功能的法拉第笼/反应室还包括用于UV发射管40的支承件90。这些支承件都涂有能催化利用水分子将臭氧分解成OH·自由基的材料,并且支承件的形状被设计成使流经反应室的空气发生涡旋或旋转。一种合适的涂层材料是锐钛型二氧化钛。优选的是所有内表面11都被相同地进行涂覆。
臭氧的这种破坏(光-氧化)增加空气流内自由基的浓度,特别是羟基OH-的浓度。这些自由基还有力地将空气流内残余的污染物氧化。
试验已显示,在空气流后等离子体过滤中驻留的自由基显著提高光-氧化过程中羟基的生成率。
已经过反应室并从网33排出的被处理过的空气富含OH·基,并且包含有通常小于100ppb的少量臭氧,以及水蒸汽。为确保没有大量的臭氧进入待处理的腔室,排出的空气与通过喷洒头57引入的测定容积的烃混合。所述烃优选是公知不具有毒性的萜烯,通常是月桂烯。萜烯分子中的不饱和双键优先和臭氧反应,产生更多的OH·基。这种臭氧-萜烯反应发生在本发明的装置内,以使得只有接下来产生OH·基的反应产物被排到待处理的腔室/罩中。烃发射器50的步进马达53的转速控制萜烯的输送率。通过将步进马达联接到控制板(未示出)能够精确地控制萜烯的输送速率,由此确保排出的空气中的自由臭氧能与适量的萜烯反应。这些反应所产生的空气流包含模拟室外空气中自然过程的公知为“开放空气因子”的级联反应,其负责连续净化室外空气。
这些优先反应的产物具有零蒸汽压力,并且因此凝结在空气流中任何残余的微粒上或者表面上。结果,一旦净化过的空气流经过壳体1的出口6离开,在表面上不会很快发生环境空气内污染物的净化。
净化装置外的这些初始凝结反应可导致小微粒“生长”,在极端情况下会导致可见的雾气或薄雾。这是不希望的。但是,由于空气净化装置有效地将环境内的空气再循环和再净化,所以这些小微粒在任何情况下都会在非热能等离子体过滤器22内被去除。
小微粒的实际好处在于一旦被再循环,它们为产生等离子体过滤器30内的羟基提供燃料。因此,虽然导致可见雾气的可能性是不希望的,但是它对提高净化装置的效率是有益的,并且因此对环境空气的安全有利。
用于装置的电源优选包括反馈电路,其能使非热能等离子体单元在各种不同的环境条件下以最佳谐振频率运行。已经观察到在试验中,当流经所述单元的空气组分本身从标准发生变化时,单元的谐振频率和电容会发生很大的变化。因此使电源持续匹配不断变化的谐振能确保最佳效率。
另外,电源优选包含监视电容和谐振频率变化的探测器电路(未示出)。来自该电路的信号可要求被放大。所述信号可以被用于驱动指示器,所述指示器给操作者发送空气组分状态已经发生改变的信号,例如,发出气体或生化攻击的警告。该信号也可以被用于操作开关,以接合位于装置内的多重或者双重部件,从而根据任务难度的增大来增大净化能力。
空气流发生器能被反向驱动,从而能够通过将空气流中携带的过量的自由基倒吸穿过所述装置来实现对装置内部的净化。所以,所述装置具有很强的自我清洁能力。
图3a和3b示出本发明的可替代方面,其中等离子体单元的介电体被精细的去离子水雾所取代。该实施例将空气输送系统的背压最小化,从而降低能量要求和噪音。另外,在非热能等离子体中水滴的存在明显地增加OH·基的产量,还通过将过氧化氢的浓度和过氧化氢与臭氧的联合体(peroxone(或peroxozone))增加到超过之前采用的传统“介电三明治”等离子体设计的方式降低臭氧的浓度。
在其他细节中,等离子体单元200包括管状部件201,其中管壁作为阴极,所述管具有连接到高压/高频电源205的中心固定的阳极203,从而需在阳极和阴极之间的介电空间210中产生非热能等离子体。阴极212接地。
通过精细的去离子水雾在介电空间210内设置介电体。水滴应当足够小以在空气中自由漂浮,并且这可以通过使用例如设置在容器220中的专有超声波喷雾器来实现。风扇222驱使去离子水蒸汽从容器进入介电空间210,并且空气入口230往容器内供应空气,空气在所述容器内饱含水雾并如B所示被推进管状等离子体单元200。来自周围环境(也就是待净化的房间或腔室)的空气C通过分开的入口240被引入,并被风扇245推进介电空间。
对风扇222,245的相对速度的控制能控制和调整介电空间中去离子水滴的数量。
图4到6根据本发明另一方面示出可替代的等离子体单元300,以及这种单元的阵列400。阵列400的每个等离子体单元300为柱状且具有中心的高压高频电极302,所述电极302由激活的氧化铝颗粒介电体304围绕,通常直径是5-6mm。激活的氧化铝颗粒借助于尺寸适于保持所述颗粒的阴极网306相对于中心阳极保持就位。当适当的电源315(通常是10Kv,20KHz)供电给电极时,在阳极302和阴极306之间的介电体304中产生非热能等离子体。经试验证明,有效的非热能等离子场308(在图4和5中用虚线表示)某种程度上延伸超出单元的物理尺寸,这可能是因为单元内产生的能量所释放的电子。
如图4所示,单独的柱状单元以交错行形式进行的布置使用“延伸的”等离子场308来处理直接经过阵列的空气(图4中箭头所示),同时使净化系统内的背压最小化。还有,这提供一种更有效更经济的装置。所述阵列的每个外壁以例如硅橡胶的分层结构310的形式设有绝缘体,如图5所示。
另外,隔板312设在阵列400的壁以内且在单元的行之间,以引导单独的等离子体单元300之间的空气。
等离子场308接触或者重叠(根据单元和所施加场的间距),并且因此空气不进入等离子体状态就不能流过阵列。空气的物理控制引导在等离子体柱处的空气流,从而确保较大的微粒和分子被部分地吸收到介电材料304上,允许较长时间暴露于等离子场308,以及分解这些较大的污染物的内在氧化反应。
构成阵列的单独单元可以以足够维持单独单元中非热能等离子体的频率被顺序开关,即使单元短时间内没有电源。这依赖于脉冲的非热能等离子体状态的存在时间比产生它所需的电能脉冲的时间要长百分之几秒(several hundredths of second)。这种顺序的开关能通过使用机电的或固态的专有汽车分配技术来实现。
以上所描述的实施例仅仅是示范,并且各种改动在不偏离所附权利要求限定的本发明范围的前提下对于本领域技术人员是显而易见的。
Claims (9)
1.一种用于空气净化的设备,所述设备包括具有空气入口和空气出口以及在所述空气入口和所述空气出口之间的空气通道的壳体,用于引导空气流穿过壳体的装置,所述壳体包括非热能等离子体单元、紫外线发射装置和臭氧分解催化剂,所述非热能等离子体包括阳极、介电体和阴极,所述阴极采用网状罩的形式,所述网状罩围绕所述紫外线发射装置和所述臭氧分解催化剂以形成反应室和法拉第笼。
2.如权利要求1所述的设备,其中在所述壳体内所述反应室的下游设置烃发射器。
3.如权利要求1或2所述的设备,其中在所述壳体内设置水滴发射器以用于将精细的水雾输送进所述反应室中。
4.如权利要求1或2所述的设备,其中所述壳体包括用于给所述反应室发送某个波长的微波的装置。
5.如权利要求1或2所述的设备,其中所述介电体包括激活的氧化铝颗粒。
6.如权利要求1或2所述的设备,其中所述介电体包括去离子水滴或水蒸汽。
7.如权利要求1或2所述的设备,其中所述阴极包括导电材料制成的多孔网,所述多孔网形成用于围绕所述紫外线发射装置和催化剂的笼状结构。
8.如权利要求7所述的设备,其中所述阴极容纳有用于发送某个波长的微波以激活所述紫外线发射装置的微波发射器。
9.如权利要求1或2所述的设备,其中所述催化剂围绕所述紫外线发射装置。
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- 2010-02-26 CN CN201080021405.3A patent/CN102427831B/zh not_active Expired - Fee Related
- 2010-02-26 BR BRPI1014746-2A patent/BRPI1014746A2/pt not_active IP Right Cessation
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- 2010-02-26 JP JP2012501365A patent/JP5598770B2/ja not_active Expired - Fee Related
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- 2010-02-26 MX MX2011009986A patent/MX2011009986A/es active IP Right Grant
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Also Published As
Publication number | Publication date |
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JP2012521240A (ja) | 2012-09-13 |
RU2011142736A (ru) | 2013-04-27 |
GB2468865A (en) | 2010-09-29 |
CN102427831A (zh) | 2012-04-25 |
BRPI1014746A2 (pt) | 2015-08-25 |
WO2010109160A1 (en) | 2010-09-30 |
ES2544591T3 (es) | 2015-09-01 |
DK2411058T3 (en) | 2015-08-17 |
EP2411058B1 (en) | 2015-05-20 |
US9005531B2 (en) | 2015-04-14 |
GB0904978D0 (en) | 2009-05-06 |
GB2468865B (en) | 2014-04-16 |
EP2411058A1 (en) | 2012-02-01 |
HK1169339A1 (zh) | 2013-01-25 |
US20120093691A1 (en) | 2012-04-19 |
MX2011009986A (es) | 2011-12-08 |
RU2540427C2 (ru) | 2015-02-10 |
JP5598770B2 (ja) | 2014-10-01 |
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