EP2640247B1 - Aspirateur avec au moins un agrégat de suction - Google Patents

Aspirateur avec au moins un agrégat de suction Download PDF

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Publication number
EP2640247B1
EP2640247B1 EP10784471.4A EP10784471A EP2640247B1 EP 2640247 B1 EP2640247 B1 EP 2640247B1 EP 10784471 A EP10784471 A EP 10784471A EP 2640247 B1 EP2640247 B1 EP 2640247B1
Authority
EP
European Patent Office
Prior art keywords
suction
exhaust air
vacuum cleaner
accordance
filter device
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.)
Active
Application number
EP10784471.4A
Other languages
German (de)
English (en)
Other versions
EP2640247A1 (fr
Inventor
Jürgen FRANK
Kai Thorsten Langen
Maic Hensel
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
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 Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP2640247A1 publication Critical patent/EP2640247A1/fr
Application granted granted Critical
Publication of EP2640247B1 publication Critical patent/EP2640247B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • A47L5/365—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the vertical type, e.g. tank or bucket type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12—Dry filters
    • A47L9/122—Dry filters flat
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/20—Means for cleaning filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies

Definitions

  • the invention relates to a vacuum cleaner with the features of the preamble of claim 1.
  • Vacuum cleaner with a dirt collecting container and a suction cup which can be placed on the dirt collecting container wherein the suction head has at least one suction unit which is in fluid communication with the dirt collecting container via a suction channel and a filter device and at least one exhaust air channel via at least one exhaust air channel for example, in the publication DE 10 2005 017 568 A1 described.
  • the dirt collector is often designed in the manner of a bucket on which the suction head can be placed.
  • the suction head comprises at least one suction unit, with the aid of which the dirt collecting container can be subjected to negative pressure. This makes it possible to pick up suction material from a surface, for example a floor surface, and transfer it to the dirt collecting container.
  • the flow connection between the dirt collecting container and the at least one suction unit takes place via a suction channel and a filter device.
  • a filter device By means of the filter device sucked in by the dirt collecting suction air can be filtered.
  • the sucked suction air is discharged from the at least one suction unit to the environment.
  • the at least one suction unit is in flow connection via at least one exhaust air duct with at least one exhaust air opening.
  • the exhaust port is configured in the form of exhaust slots, which are arranged in a hood-shaped housing of the suction head.
  • Vacuum cleaners of the type described above should on the one hand have a high suction power, so that a surface to be cleaned can be sucked off within a short time, with coarse suction material from the surface in the dirt collector is transferred.
  • the vacuum cleaner should have a compact design possible and the operation of the vacuum cleaner should be associated with the lowest possible noise.
  • WO 2010/121656 A1 is a vacuum cleaner known with a dirt collecting container on which a suction head can be placed.
  • the suction head has two juxtaposed suction units, which are in each case via a filter device with the dirt collecting and via an exhaust duct with at least one exhaust port in flow communication.
  • the suction units are positioned in the vertical direction at the same height as the filter devices.
  • a similarly designed vacuum cleaner is from the utility model DE 20 2004 012 911 U1 known.
  • the two suction units are arranged above the filter devices and surrounded by a common exhaust air space.
  • a vacuum cleaner with the features of the preamble of claim 1 is known.
  • the exhaust air space communicates via a first and a second exhaust air duct with exhaust air openings in fluid communication and the filter device is arranged between the exhaust air ducts.
  • Object of the present invention is therefore to develop a vacuum cleaner of the type mentioned in such a way that it has a high suction power and a compact design and its operation is associated with a relatively low noise.
  • the vacuum cleaner according to the invention is characterized by a high suction power.
  • he has two suction units.
  • the two suction units are arranged side by side and next to the filter device, in the vertical direction, the two suction units are at the same height as the filter device.
  • the noise of the two suction units is kept relatively low by being surrounded by a common exhaust air space, from which the exhaust air of the suction units can be discharged via two exhaust ducts at exhaust ports.
  • the filter device is located between the two exhaust air ducts. This improves the compact design of the vacuum cleaner.
  • the provision of the exhaust ducts has the additional advantage that the noise of the vacuum cleaner can be kept very low.
  • the filter device is designed according to the invention as a flat fold filter. It is advantageous if the flat fold filter is replaceable on the clean side. This has the advantage that the user does not get in contact with heavily soiled areas of the vacuum cleaner when replacing the flat pleated filter.
  • the flat pleated filter may, for example, have a filter cartridge which is accessible to the user on the downstream side of the filter with respect to the flow direction of the suction air.
  • the vacuum cleaner has a filter cleaning device with which the filter device can be cleaned.
  • the filter device can by means of the filter device, the suction air to be filtered.
  • the filter device sets gradually during the operating time with dirt particles, so that the filter device of the suction air opposes an increasing flow resistance and thus the suction power of the vacuum cleaner is increasingly reduced. It is therefore advantageous if the filter device can be cleaned.
  • the vacuum cleaner has a filter cleaning device.
  • the filter cleaning device is arranged above the filter device.
  • the filter cleaning device may, for example, have an external air valve, which may be opened for filter cleaning, via the external air valve external air abruptly flow into the suction channel and the filter device can act on its side facing away from the dirt collecting. This leads to a mechanical vibration of the filter device.
  • at least part of the external air flowing in via the external air valve flows through the filter device counter to the direction of flow prevailing during the normal suction operation. As a result, the detachment of dirt particles is reinforced by the filter device.
  • the filter cleaning device is advantageously electrically controllable. It can be provided, for example, that the filter cleaning device has an electromagnet, with the aid of which the external air valve can be electrically actuated by a control device of the vacuum cleaner.
  • the exhaust air ducts are configured in a straight line.
  • the exhaust ducts form calming zones for the exhaust air.
  • the occurrence of air turbulence is kept low. As a result, a strong noise can be avoided.
  • the exhaust ducts are preferably aligned horizontally.
  • an additional noise reduction is achieved in an advantageous embodiment of the vacuum cleaner according to the invention in that the exhaust air space and / or the exhaust air ducts are at least partially lined by an insulating material.
  • Insulating mats in particular, can be used as insulation material, as they are known per se to a person skilled in the art.
  • the exhaust air chamber completely surrounds the two suction units in the circumferential direction.
  • Such a configuration has the advantage that the suction air, which is sucked by the suction units, can be discharged over the entire circumference of the suction units to the exhaust air space. Subsequently, the exhaust air can then be discharged via the two exhaust air ducts and the adjoining exhaust openings to the environment.
  • the suction head has a bottom wall on which an exhaust hood rests, the bottom wall and the exhaust hood defining the exhaust air space.
  • the exhaust air space thus extends between the bottom wall of the suction head and the exhaust hood.
  • the two exhaust air ducts can connect to the exhaust hood.
  • the exhaust air ducts and the exhaust air space are formed in such an embodiment of the invention of the bottom wall of the suction head and the exhaust hood including the extensions.
  • the exhaust hood has two openings which are each penetrated by a suction housing, wherein the suction housing each receive a suction unit and wherein between the suction housings and the exhaust hood, a vibration-isolating material is arranged.
  • the suction housing can each serve to support a suction unit. Mechanical vibrations, which are transmitted from the suction units to the suction housing, can not readily be transferred to the exhaust hood, since a vibration-isolating material is arranged between the exhaust hood and the suction housings, for example a sponge rubber seal.
  • the suction housings are conveniently detachably connected to the bottom wall. For example, they can be bolted to the bottom wall.
  • the suction head advantageously has an outer hood which covers the exhaust hood. This leads to a further noise reduction.
  • the suction channel via which the suction turbines are in fluid communication with the dirt collecting container, has in an advantageous embodiment a vertically extending channel portion which is arranged between the filter device and the exhaust hood. This allows a particularly compact design of the vacuum cleaner according to the invention.
  • the vacuum cleaner comprises a dirt collecting container 12, on which a suction head 14 is placed.
  • a first suction unit 16 and a second suction unit 18 are arranged, by means of which the dirt collecting 12 can be subjected to negative pressure.
  • the dirt collecting container 12 comprises a suction inlet 20, to which a suction hose, known per se to a person skilled in the art, can be connected in the usual way, which can carry a suction nozzle at its free end facing away from the dirt collecting container 12. This makes it possible to suck off a surface, in particular a bottom surface, wherein suction material can be sucked from the surface via the suction inlet 20 into the dirt collecting container 12.
  • the two suction units 16 and 18 each include an electric motor 22 and 24, which drives a suction turbine 26 and 28, respectively.
  • the electric motors 22, 24 as well as the suction turbines 26, 28 are vertically aligned, d. H. the engine and turbine axles run in the vertical direction.
  • the electric motors 22, 24 are positioned above the suction turbines 26 and 28, respectively.
  • the filter device 32 is disposed at a suction outlet 34 of a bottom wall 36 of the suction head 14 and formed in the form of a flat pleated filter 38.
  • the suction channel 30 comprises a horizontal channel section 40 which extends along the upper side of the filter device 32 facing away from the dirt collector 12 and a vertical channel section 42 which adjoins the horizontal channel section 40 and extends to end sections 44, 46 below the suction turbines 26 and 28 are arranged.
  • the suction units 16 and 18 are each arranged in a cup-shaped suction housing 48 and 50, 26 and 28 having a plurality of housing openings, not shown in the drawing, through which the sucked suction air can be discharged at the level of the suction turbine.
  • the suction units 16 and 18 are for this purpose surrounded by a common exhaust air space 52 which is defined by an exhaust hood 54 and the bottom wall 36.
  • the exhaust hood 54 has, on its upper side facing away from the bottom wall 36, a first opening 56 and a second opening 58.
  • the first opening 56 is penetrated by the suction housing 48 of the first suction unit 16 and the second opening 58 is penetrated by the suction housing 50 of the second suction unit 18.
  • the suction housing 48, 50 are detachably connected by means of connecting screws 64 to the bottom wall 36.
  • the exhaust air space 52 is adjoined in the horizontal direction by a first exhaust air duct 66 and an identically formed second exhaust air duct 68, which are configured in a straight line and extend in a horizontal direction along transverse sides of the filter device 32 facing away from one another.
  • the filter device 32 is disposed between the first exhaust duct 66 and the second exhaust duct 68 and is located in the vertical direction at the same height as the two suction units 16 and 18. This is in particular from the Figures 2 and 4 clear.
  • a filter cleaning device 74 is arranged in the suction head 14. This comprises an external air valve 76 with a vertically movable valve plate 78, which in its closed position, as shown in FIG. 4 is shown sealingly against a valve housing 80 and thereby the external air valve 76 closes.
  • the valve disk 78 is held in its closed position.
  • the external air valve 76 can be opened briefly.
  • foreign air can penetrate into the horizontal channel section 40 of the suction channel 30 and mechanically act on the side of the filter device 32 facing away from the dirt collecting container 12.
  • This leads to a mechanical vibration of the filter device 32 which has the consequence that at the dirt collecting container 12 facing bottom of the filter device 32 adhering dirt particles are released.
  • at least a portion of the external air flows through the filter device 32 against the during normal suction operation of the vacuum cleaner 10 forming flow direction. As a result, the detachment of dirt particles from the filter device 32 is amplified.
  • the external air valve 76 is closed, so that by means of the two suction units 16 and 18 of the dirt collecting 12, as already mentioned, can be subjected to negative pressure.
  • the sucked by the suction units 16, 18 suction air can be supplied via the common exhaust air chamber 52 and the adjoining rectilinear exhaust ducts 66, 68 exhaust ports 84, 86, via which the exhaust air can be discharged to the environment.
  • the exhaust openings 84, 86 are configured in the form of exhaust air slots, which are formed in an outer hood 88 of the suction head 14. This is going out FIG. 1 clear.
  • the exhaust air ducts 66 and 68 are formed by channel-shaped, in the illustrated embodiment U-shaped extensions 90, 92 of the exhaust hood 54 on the one hand and the bottom wall 36 on the other.
  • the extensions 90, 92 are formed on the exhaust hood 54 so that they form in combination with the exhaust hood 54 a one-piece exhaust air guide part 96 of the suction head 14, which is seated on the bottom wall 36 and surrounds the suction units 16, 18 in the circumferential direction.
  • the exhaust air guide part 96 is arranged in the vertical direction at the same height as the filter device 32, and between the filter device 32 and the exhaust air guide part 96, the vertical channel portion 42 of the suction channel 30 is arranged. This is especially true FIG. 2 clear.
  • the exhaust air guide part 96 is largely lined by an insulating material in the form of an insulating mat 98, which serves to reduce noise.
  • the vacuum cleaner 10 has a high suction power due to the use of the two suction units 16 and 18. Despite this high Suction power, it is characterized by a low noise. Occurring operating noise are kept low by the provision of the exhaust air chamber 52 and the rectilinear subsequent exhaust air ducts 66, 68 and by the use of the insulating mat 98.
  • the vacuum cleaner 10 is also characterized by a compact design. This is achieved in particular in that the two suction units 16, 18 are arranged in the vertical direction at the same height as the filter device 32, wherein the exhaust air ducts 66 and 68 along the transverse sides 70, 72 of the filter device 32 extend, thus between the two exhaust air ducts 66 , 68 is arranged.

Claims (14)

  1. Aspirateur comprenant un contenant collecteur de saletés (12) et une tête d'aspiration (14) pouvant être mise en place sur le contenant collecteur de saletés (12), dans lequel la tête d'aspiration (14) comprend deux groupes d'aspiration (16, 18) juxtaposés, qui sont en liaison fluidique avec le contenant collecteur de saletés (12) par l'intermédiaire d'un canal d'aspiration (30) et d'un système de filtre (32) et avec au moins un orifice d'évacuation d'air (84, 86) par l'intermédiaire d'au moins un conduit d'évacuation d'air (66, 68), dans lequel les groupes d'aspiration (16, 18) sont positionnés dans le sens vertical à la même hauteur que le système de filtre (32) et sont entourés par un espace d'évacuation d'air (52) commun, et dans lequel l'espace d'évacuation d'air (52) est en liaison fluidique avec les orifices d'évacuation d'air (84, 86) par l'intermédiaire d'un premier et d'un deuxième conduit d'évacuation d'air (66, 68) et le système de filtre (32) est agencé entre les deux conduits d'évacuation d'air (66, 68), caractérisé en ce que le système de filtre (32) présente un filtre plissé plat (38.)
  2. Aspirateur selon la revendication 1, caractérisé en ce que les deux groupes d'aspiration (16, 18) sont configurés de manière identique.
  3. Aspirateur selon la revendication 1 ou 2, caractérisé en ce que les deux groupes d'aspiration (16, 18) sont orientés verticalement.
  4. Aspirateur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un système de nettoyage de filtre (74) est agencé au-dessus du système de filtre (32).
  5. Aspirateur selon l'une quelconque des revendications précédentes, caractérisé en ce que les conduits d'évacuation d'air (66, 68) sont rectilignes.
  6. Aspirateur selon l'une quelconque des revendications précédentes, caractérisé en ce que les conduits d'évacuation d'air (66, 68) sont orientés horizontalement.
  7. Aspirateur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'espace d'évacuation d'air (52) et/ou les conduits d'évacuation d'air (66, 68) sont revêtus au moins partiellement d'un matériau isolant (98).
  8. Aspirateur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'espace d'évacuation d'air (52) entoure entièrement les groupes d'aspiration (16, 18) dans la direction circonférentielle.
  9. Aspirateur selon l'une quelconque des revendications précédentes, caractérisé en ce que la tête d'aspiration (14) présente une paroi inférieure (36) sur laquelle repose un chapeau d'évacuation d'air (54) qui définit l'espace d'évacuation d'air (52) en combinaison avec la paroi inférieure (36).
  10. Aspirateur selon la revendication 9, caractérisé en ce que deux extensions (90, 92), qui définissent les conduits d'évacuation d'air (66, 68) en combinaison avec la paroi inférieure (36), sont formées sur le chapeau d'évacuation d'air (54).
  11. Aspirateur selon la revendication 9 ou 10, caractérisé en ce que le chapeau d'évacuation d'air (54) présente deux orifices (56, 58), qui sont traversés chacun par un carter d'aspiration (48, 50), dans lequel les carters d'aspiration (48, 50) logent respectivement un groupe d'aspiration (16, 18) et un matériau d'isolation vibratoire (60, 62) est agencé entre les carters d'aspiration (48, 50) et le chapeau d'évacuation d'air (54).
  12. Aspirateur selon la revendication 11, caractérisé en ce que le carter d'aspiration (48, 50) est relié de manière détachable à la paroi inférieure (36) .
  13. Aspirateur selon l'une quelconque des revendications 9 à 12, caractérisé en ce que la tête d'aspiration (14) présente un chapeau extérieur (88), qui recouvre le chapeau d'évacuation d'air (54).
  14. Aspirateur selon l'une quelconque des revendications 9 à 13, caractérisé en ce que le conduit d'aspiration (30) présente une partie de conduit (42) qui s'étend verticalement et qui est agencée entre le système de filtre (32) et le chapeau d'évacuation d'air (54) .
EP10784471.4A 2010-11-16 2010-11-16 Aspirateur avec au moins un agrégat de suction Active EP2640247B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/067564 WO2012065627A1 (fr) 2010-11-16 2010-11-16 Aspirateur comprenant au moins un groupe d'aspiration

Publications (2)

Publication Number Publication Date
EP2640247A1 EP2640247A1 (fr) 2013-09-25
EP2640247B1 true EP2640247B1 (fr) 2019-04-24

Family

ID=44243566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10784471.4A Active EP2640247B1 (fr) 2010-11-16 2010-11-16 Aspirateur avec au moins un agrégat de suction

Country Status (6)

Country Link
US (1) US9351620B2 (fr)
EP (1) EP2640247B1 (fr)
CN (1) CN103220953B (fr)
DK (1) DK2640247T3 (fr)
RU (1) RU2564208C2 (fr)
WO (1) WO2012065627A1 (fr)

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CN104414588B (zh) * 2013-09-06 2017-02-08 江苏美的清洁电器股份有限公司 吸尘器及其排气装置
CN105848549B (zh) * 2013-12-06 2018-03-06 阿尔弗雷德·凯驰两合公司 自行驶且自转向的地板清洁设备和清洁系统
CN106170238B (zh) * 2014-04-04 2020-06-02 创科实业有限公司 真空吸尘器
CA3021642A1 (fr) * 2016-04-20 2017-10-26 Fathhome, Inc. Procede et appareil a base de vide permettant de nettoyer des articles salis
USD874765S1 (en) * 2018-04-30 2020-02-04 Emerson Electric Co. Powerhead for a battery-powered wet/dry vacuum cleaner
CN113710134B (zh) * 2020-03-18 2022-06-28 苏州欧圣电气股份有限公司 一种吸尘器

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Also Published As

Publication number Publication date
WO2012065627A1 (fr) 2012-05-24
EP2640247A1 (fr) 2013-09-25
US9351620B2 (en) 2016-05-31
RU2564208C2 (ru) 2015-09-27
DK2640247T3 (da) 2019-07-08
CN103220953B (zh) 2016-04-13
US20130247328A1 (en) 2013-09-26
CN103220953A (zh) 2013-07-24
RU2013127140A (ru) 2014-12-27

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