Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25C—PRODUCING, WORKING OR HANDLING ICE
  • F25C3/00—Processes or apparatus specially adapted for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Producing artificial snow
  • F25C3/04—Processes or apparatus specially adapted for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Producing artificial snow for sledging or ski trails; Producing artificial snow
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25C—PRODUCING, WORKING OR HANDLING ICE
  • F25C2303/00—Special arrangements or features for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Special arrangements or features for producing artificial snow
  • F25C2303/048—Snow making by using means for spraying water
  • F25C2303/0481—Snow making by using means for spraying water with the use of compressed air
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25C—PRODUCING, WORKING OR HANDLING ICE
  • F25C2500/00—Problems to be solved
  • F25C2500/02—Geometry problems

Definitions

• the invention relates to a snowmaking system and a method for producing artificial snow according to the preamble of the independent claims.
• a snowmaking system has become known in which a jet pump is used to operate a snowmaking device.
• the advantage of such a jet pump in addition to the simple and robust construction, is in particular that the energy required to operate the jet pump is provided by the pressure of the water supplied from a higher-lying reservoir. Thanks to the use, the energy demand of the snowmaking system can be reduced.
• water-air nozzles for generating artificial snow are connected on the output side, which are fed by the water-air mixture from the jet pump.
• this results in some disadvantages.
• this snowmaking system may result in losses in relation to the quality of the generated artificial snow.
• Unfavorable is further that the application is relatively limited, since the operating parameters can not or only slightly adapted to different environmental conditions. In particular, it is not possible to change the amount of water regardless of the amount of air. For the removal of the produced drops is further a propeller needed, which must be driven with additional electrical energy.
• the snowmaking system should be easily adaptable to different environmental conditions, enable the production of high-quality artificial snow and manage with the lowest possible energy consumption. Furthermore, it should be possible to switch on or off additional water nozzles at appropriate temperatures, without affecting the available amount of air.
• the snowmaking system according to the invention has at least one water-jet gas compressor, into which water can be introduced into a suction chamber in the form of a propulsion jet, for example via a water supply connection, and which can be sucked into further air via at least one air intake opening by utilizing the entrainment effect produced by the propulsion jet.
• a water jet gas compressor into which water can be introduced into a suction chamber in the form of a propulsion jet, for example via a water supply connection, and which can be sucked into further air via at least one air intake opening by utilizing the entrainment effect produced by the propulsion jet.
• the basic structure and operation of such water jet gas compressor has been known for some time.
• For water jet gas compressors are also terms such as jet pump, propellant pump or (engl.) "Jet pump" common.
• a separation arrangement for separating the water-air mixture from the water jet gas compressor is arranged.
• the separation arrangement is with at least one snow device for generating artificial snow, in particular with at least one snow lance connected or connectable, so that water and air from the separation arrangement are separately fed to this Schnei device.
• the separating arrangement may preferably be connected directly in the region of an outlet opening of the water jet gas compressor. Accordingly, the cutting device is not connected directly or can be connected indirectly with the water jet gas compressor with the interposition of the separating arrangement.
• supply means may be provided in the form of pipes or other lines. The separation of water and air results in considerable advantages for the operation of the cutting device.
• Water jet gas compressors When using water jet gas compressors, their energy efficiency can be significantly increased.
• the amount of compressed air and pressurized water provided by the water jet gas compressor is used for operation in the limit temperature range. If the temperatures are correspondingly lower, additional water nozzles can be added.
• the operating parameters for operating the Schnei device can thus be varied over a wide range in a simple manner and adapted to the ambient conditions, which can always be snowed with optimal conditions.
• Waterjet gas compressors are characterized, inter alia, by the fact that they contain no moving components for operation, which makes them robust and reliable to operate. Since no compressors or even fans must be used, the risk of business interruptions during snowmaking drops significantly.
• the snowmaking system according to the invention is particularly suitable for supplying a lance with compressed air containing at least one nucleator nozzle.
• the nucleator nozzle atomizes water using compressed air to create a jet of ice nuclei is brought into contact with a jet of water droplets. This so-called germination creates snow from the cooling water droplets.
• This snow lance is characterized in comparison to conventional snow lances by a relatively low compressed air demand, which can be covered with the water jet gas compressor.
• the present snowmaking system would also lend itself to conventional artificial snow producing apparatus operated using compressed air. As Schnei devices are, for example, ground-level snow cannons in question.
• the water jet gas compressor can be connected via pressure lines with a higher storage lake or connectable.
• a higher storage lake or connectable Such reservoirs are often already available in winter sports areas.
• the storage lakes are advantageous sources of pressurized water and can be used to feed the at least one water jet gas compressor.
• additional air compressors or air pumps can therefore be dispensed with.
• a height difference of at least 200 m may be sufficient.
• the separation arrangement may include a separation chamber, wherein due to gravity and because of the difference in density, the water in a lower phase in the Separating chamber trappable and the air in an upper, located above the water level phase in the separation chamber can be collected.
• a separation chamber With such a separation chamber, the phase separation of the water-air mixture can be achieved from the water jet gas compressor in a particularly simple manner.
• the separation chamber may be configured to have no moving components during operation, possibly apart from a control mechanism. This ensures reliable operation. Another advantage is that separation chambers cause almost no maintenance.
• centrifugal separators cyclones
• the snow lance can be designed such that no further facilities for compressed air supply are needed. However, the lance can have additional water connections to supply it with water.
• the water can be supplied to the lance in a conventional manner from the storage lake or by using water pumps from other sources of water.
• the separation chamber may include at least two spaced-apart exits or groups of outputs, wherein the separation chamber may include at least one outlet for the air and at least one outlet for the water spaced therefrom.
• the outlet for the air may be an upper outlet and the outlet for the water may be a lower outlet
• the water jet gas compressor and the associated therewith at least one separation chamber are designed such that the propulsion jet is ejected vertically in the mounting position in the water jet gas compressor and / or that the water-air mixture in the separation chamber in shape a plume can be introduced.
• Such an oriented arrangement has the advantage that the separation chamber can be emptied at simply downwards through, for example, the air intake bores, thus leaving no remains of water in the separation chamber, which could freeze.
• the water-air mixture which rises from the water jet gas compressor in the form of a plume in a lake accumulated at the bottom of the separation chamber, can also reduce the risk of freezing during operation by introducing kinetic energy.
• the water jet gas compressor can be located above the separation chamber.
• the water-air mixture would eject from the water jet gas compressor in the form of a free jet approximately vertically downwards into the separation chamber.
• other mounting arrangements would be conceivable.
• the at least one water-jet gas compressor and the at least one separation chamber associated therewith could be aligned horizontally.
• the water jet gas compressor may have a mixing channel into which the water and the air from the suction chamber can be fed.
• the water and the intake air flow from the suction chamber into the mixing channel, where an intense mixing of water and air takes place.
• the ratio of the mixing channel diameter or the corresponding cross-sectional area and a diameter of the motive nozzle for generating the motive jet or the corresponding cross-sectional area can essentially predetermine the intake air quantity.
• the ratio of said cross-sectional areas (mixing channel cross-sectional area: cross-sectional area of the motive nozzle) can be between 2: 1 and 10: 1 and preferably between 2.5: 1 and 5: 1.
• a further increase in pressure can be achieved if the mixing channel opens into a diffuser.
• the mixing channel is formed essentially by a hollow cylindrical, preferably designed as a separate component mixing tube.
• the water jet gas compressor may have a diffuser to which the mixing tube is attached or attachable.
• the movement of the water-air mixture after passing through the mixing tube can be greatly delayed, whereby the velocity energy of the mixture is converted into pressure energy.
• the diffuser may have a rear end facing the separation chamber, which is inserted or insertable into a diffuser receptacle of the separation chamber that is complementary to the diffuser.
• the rear end of the diffuser can simultaneously form the input for the separation chamber, through which the water-air mixture can be introduced into the separation chamber.
• the separation chamber can be formed by a container with a substantially hollow cylindrical body.
• a container has, inter alia, the advantage that it is relatively easy and inexpensive to produce.
• the container can be closed at least on the input side by a preferably releasably attachable to the base body, such as disk-shaped flange or with a so-called dished bottom.
• a preferably releasably attachable to the base body such as disk-shaped flange or with a so-called dished bottom.
• the previously mentioned diffuser receptacle for example in the form of a bore
• the Container on the opposite side of the entrance also be closed by a flange or a dished bottom.
• a snow lance may be arranged as a device for producing artificial snow with a substantially cylindrical lance body.
• the lance body may be fastened, for example, to a standpipe anchored in the ground.
• the lance body or the standpipe of the snow lance can extend coaxially or axially parallel to the longitudinal axis, at least in one floor area. With this arrangement, it is possible to provide a compact assembly. It may be particularly advantageous when the water jet gas compressor and separation chamber is integrated in the lance body or in the standpipe of the snow lance.
• the snowmaking system may then include a device having at least one nucleator nozzle for generating ice nuclei.
• ALR air-to-water mass flows
• the apparatus for producing artificial snow may be a snow lance, which may comprise at least one nucleator nozzle for generating ice nuclei and at least one water nozzle for generating water droplets.
• a snow lance which may comprise at least one nucleator nozzle for generating ice nuclei and at least one water nozzle for generating water droplets.
• the Eiskeimumble can be at least 10 cm, in particular about 20 to 30 cm and / or the drop distance can be at least 20 cm, in particular about 40 to 80 cm.
• Such a snow lance is described in the previously mentioned PCT / EP2008 / 058863.
• the relatively long in comparison to the prior art Eiskeim schedulen or drop paths allow a better freezing of the exit from the Nukleatordüse only externally slightly frozen ice nucleus droplets or a better cooling of the water droplets produced from the water nozzle.
• the longer drop zone allows a greater energy dissipation to the environment through convection and evaporation.
• snow bulb temperature can increase with such snow lances by 2 to 3 degrees Celsius.
• the arrangement according to the invention and the nucleator nozzle according to the invention it was possible to achieve a massive reduction in air consumption by at least 50% compared with the prior art.
• An advantageous snow-making system can result if it has a plurality of cutting devices, in particular in the form of snow lances.
• a plurality of cutting devices may be connected or connectable to a common separation arrangement. It is therefore conceivable that each unit containing water jet gas compressor and separation arrangement two or more snow lances can be supplied with water and compressed air.
• the snowmaking system may comprise at least one apparatus in the form of a snow lance with a water nozzle for generating water droplets, wherein the system is designed such that in the operating phase by means of control means and / or wiring preferably a defined water flow is constantly guided or feasible to the water nozzle.
• the diameter of the motive nozzle is dimensioned so that the water mass flow of the motive nozzle at the desired separation chamber pressure can flow in any case through the water nozzle. With this arrangement, a constant flow in the water-jet gas compressor can be maintained, thus ensuring reliable operation of the system.
• a further aspect of the invention relates to a method for producing artificial snow, in particular using the snow-making system described above.
• water is introduced as the driving medium under pressure into a water jet gas compressor. Air is sucked into the waterjet gas compressor utilizing the entrainment effect caused by the propulsion jet.
• the phases of the water-air mixture from the water jet gas compressor by means of a separation arrangement separated from each other; Subsequently, the thus separated water and the air under pressure are supplied separately to an artificial snow generating device.
• FIG. 1 is a highly schematic schematic diagram of a snowmaking system according to the invention with a unit of water jet gas compressor and separation arrangement and a snow lance,
• Fig. 2a is a schematic representation of the unit with
• FIG. 2b shows the unit of Fig. 2a, but in a different vertical mounting position (reverse orientation),
• FIG. 4 is a perspective view of a unit with water jet gas compressor and separation chamber
• FIG. 5 shows the unit from FIG. 4 in a side view
• FIG. 6 shows a longitudinal section through the unit in a somewhat enlarged view (section line B-B according to FIG. 5), FIG.
• FIG. 7 shows the detail C of FIG. 6, 8 is a perspective view of another snow-making system
• FIG. 9 is a schematic representation of a snowmaking system according to an alternative embodiment
• FIG. 11 shows a snowmaking system with a lance and a unit attached thereto laterally
• FIG. 13 shows a snowmaking system with a snow lance and a freestanding unit
• FIG. 14 is a highly schematic representation of an arrangement for snowmaking a ski slope with a plurality of snow lances in a first variant and an associated path-pressure diagram
• Fig. 16 shows an arrangement for snowmaking a ski slope with a
• Fig. 17 shows a fourth variant of the arrangement and an associated path-pressure diagram
• Fig. 18 shows a fifth variant of the arrangement and an associated path-pressure diagram.
• FIG. 1 shows a snowmaking system according to the invention designated by 1.
• the snow-making system 1 has a unit 10 with a water-jet gas compressor 2 and a separating arrangement 3.
• W 1 denotes a water flow which is supplied to the unit 10.
• ambient air is sucked in (supply of air is indicated by the arrow L1).
• the water-air mixture M finally passes into the separation arrangement 3, in which a phase separation takes place.
• water W2 and compressed air L2 may then be separately supplied under pressure to a snow-making device 4 for producing artificial snow.
• the unit 10 is particularly suitable for supplying a lance with compressed air and water.
• 1 contains at least one nucleator nozzle 21 for generating an ice germ jet and at least one water nozzle 22 for generating a jet of water.
• the nozzles are arranged in such a way in the snow lance that meet the respective rays in a Einkeimzone E.
• the device 4 shown by way of example in FIG. 1 therefore does not have to be operated exclusively with water W 2 from the unit 10. Of course, the inventive device can also be supplied additional water. Theoretically, it would also be conceivable to use only the compressed air generated by means of the unit for the production of artificial snow, ie not to connect the separation arrangement with the device with respect to the water supply.
• the water jet gas compressor essentially consists of the following components: a motive nozzle 6, a suction chamber 7, a mixing channel 14 and a diffuser 9.
• the principle of water jet gas compressors has long been known and customary.
• the two media are symbolically represented by color in FIGS. 2a and 2b and 3 (water: gray, air: white).
• Water Wl is supplied under pressure via a water supply port 11 of the drive nozzle 6, which generates a drive jet designated 23.
• Air Ll preferably in the form of ambient air is entrained via an air intake 12 from the propulsion jet and sucked so.
• a water-air mixture M which is guided into the mixing channel 14 with a constant or variable channel cross-section, wherein an intensive mixing of water and air takes place.
• the water-air mixture M is then delayed in a diffuser 9, whereby the velocity energy of the mixture M is converted into pressure energy.
• a separation chamber 3 designed as a separation chamber, a phase separation takes place.
• the water W2 on the one hand and the air L2 on the other hand can then via separate outputs 17 and 16 a (Not shown here) device for producing artificial snow are supplied.
• the water-air mixture M passes as a free jet into the separation chamber 3.
• the water is collected therein in a lower phase in the region of the bottom of the separation chamber 3, the air rises by the buoyancy of itself and is in an upper collected above the water level 28 cavity.
• the unit 10 is reversed in relation to FIG. 2.
• the water-air mixture rises in the accumulated in the separation chamber in the region of the bottom lake of water as a two-phase flow, which is known in the art as the term "plume".
• a control means (not shown) (eg a throttle valve) can be arranged in all embodiments with which the level of the water level 28 can be maintained at a constant level (cf. Fig. 9).
• the unit 10 - as Figure 3 shows - are also mounted with a horizontal orientation. At water pressures of 15-60 bar for Wl and intake of ambient air (1 bar) equal pressures in the range 6-20 bar abs can be achieved in the separation chamber for both phases.
• the separation chamber is designed as a container having a cylindrical base body 15.
• the base body 15 is closed by a flange 18 on the side facing the water jet gas compressor (input side).
• the container is closed with a flange 19.
• On the base body 15 are located at a distance from each other for outputs Air and water.
• a water outlet is a water outlet 17, as the air outlet, a corresponding nozzle 16 is provided.
• 17 'another nozzle is referred to, which could be used for example for emptying or possibly as an additional water nozzle for the water outlet. However, such a connection is not necessarily provided.
• FIGS. 4 to 6 Further connections provided with flanges can be seen in FIGS. 4 to 6. These (unspecified) connections have sight glasses in the region of the flange, which allow a consideration of the processes in the separation chamber (see also Fig. 6). On the latter connections can be waived for units in series production, however. 5, the water lines 32 and compressed air lines 33 shown with dashed lines are indicated, which in each case at the corresponding nozzle (air intake 16,
• the mixing channel 14 is formed essentially by a separate component.
• This component referred to as a mixing tube 8 is inserted on one side into a complementary bore in a body forming the diffuser 9.
• the diffuser 9 has an outlet opening 13 with a diameter D (eg D 15 mm).
• the motive nozzle 6 is suitably fixed in a member constituting the suction chamber 7. With 31 a tapered nozzle head is referred to, with which the propulsion jet can be generated.
• the cylindrical cavity for a cutting chamber 3 for supplying a lance may, for example, have a diameter of 100 to 300 mm and a height of 300 to 1000 mm (eg h ⁇ 900 mm) (the height mentioned is designated by h in FIG. 6).
• the water jet gas compressor can be in axial direction have a length of 200 to 600mm (indicated with s, eg s ⁇ 450mm).
• the mixing channel diameter d can be, for example, between 5 and 12 mm (eg d ⁇ 7 mm).
• the ratio between the cross-sectional areas of the mixing channel and the motive nozzle can substantially predetermine the intake air quantity. This ratio of said cross-sectional areas (mixing channel cross-sectional area: cross-sectional area of the motive nozzle) can be between 2: 1 and 10: 1 and preferably between 2.5: 1 and 5: 1.
• the diameter of the motive nozzle is about 4mm and said ratio at a mixing channel diameter of 7mm thus about 3: 1. If several cutting lances are connected to the separation chamber, a correspondingly larger volume must be provided in the separation chamber, at least as a rule.
• FIG. 8 relates to an example of a snowmaking system 1 in a compact design.
• the unit 10 containing water jet gas compressor 2 and separation chamber 3 is fixed to a frame 30 such that the longitudinal axis A of the unit is vertically aligned.
• a lance 4 is arranged, the lance body 24 of which runs coaxially to the longitudinal axis A.
• the snow lance 4 has a plurality of water nozzles 22 and 22 'arranged at different levels and nucleator nozzles designated 21. Details concerning the snow lance from FIG. 8 can be taken from the as yet unpublished international patent application PCT / EP2008 / 058863.
• FIG. 9 shows a snowmaking system 1 with a lance 4 equipped with a nucleator nozzle 21 and a water nozzle 22.
• the nucleator nozzle 21 is supplied with compressed air from the unit 10.
• the nucleator nozzle 21 is connected via a compressed air line to the air outlet 16 of the separation chamber 3, whereby the Air flow L2 (or at least part of the air flow L2) is guided to the nozzle 21.
• the water flow W2 from the separation chamber 3 leads to the water nozzle 22.
• the water necessary for the formation of ice nuclei is branched off from a main or central line 36 and is led to the nucleator nozzle 21.
• FIG. 9 also shows a control means, designated by 34, for example a control valve for controlling the flow W2.
• a control means designated by 34
• the level in the separation chamber can be controlled.
• FIG. 9 is directed to the basic configuration of the snowmaking system according to the invention, only individual nozzles 21, 22 are shown for the sake of simplicity.
• the snow lance may include a variety of nucleator nozzles and water nozzles in a variety of nozzle arrangements.
• the snow lance may have, for example, a plurality of nucleator nozzles and water nozzles, which are each arranged distributed over the circumference on the lance body.
• the lance body may be further provided with a plurality of groups of water jets arranged in at least two different axial positions on the lance body (see, e.g., Fig. 8).
• FIG. 10 shows a possible routing for the water and air streams of a snowmaking system 1.
• Water W is first fed from a pressurized water source 5 to the snow lance 4, where it is guided upwards, flows around the snow lance head and is guided downwards again, until finally it passes over as Wl the water supply connection
• the system comprises one or a group of predetermined water nozzles 22 and is designed such that in the operating phase for maintaining an approximately constant power in the water jet gas compressor 2, a predetermined water flow is led to these predetermined water nozzles 22.
• the lance body does not necessarily have to be configured as a straight pillar but can have a kink.
• FIGS. 11 and 12 show how the unit 10 with the water jet gas compressor 2 and the separation chamber 3 can be mounted on or in a snow lance 4.
• the lance 4 has a lance body 24 which is fixed to a standpipe 37.
• the standpipe 37 forms a holder for anchoring the lance in the ground 20.
• the standpipe 37 extends vertically.
• the unit 10 is mounted in a vertical orientation laterally on the standpipe.
• Figure 12 relates to a solution in which the unit is housed in a cavity of the standpipe 37.
• the installation according to FIG 12 is characterized by an advantageous compactness.
• the unit can also be designed freestanding with respect to the snow lance 4. Such an embodiment is shown in FIG.
• FIGS. 14 to 18 show different variants of arrangements of snow-making systems with several snow-lances.
• Figure 14 shows an arrangement with the snow lances 4, 4 ', 4''and4''', in which each lance a unit 10, 10 ', 10'',10''' is associated.
• the snow lances and the units assigned to them are located at different sea levels, with the snow lance 4 or unit 4 being the highest and the snow lance 4 '''or unit 10''' is located at the lowest point.
• These units each contain the previously described water jet gas compressors and separation arrangements.
• Each unit 10, 10 ', 10'',10''' is connected on the input side to a central line 36, via which water is supplied under pressure to the respective units.
• a water pipe is designated, is supplied via the water from the unit of the snow lance.
• the compressed air line for feeding the lance with compressed air is designated 33.
• the individual pressures assigned to the respective snow lances or units are different due to the different heights.
• the unit 10 has the lowest driving pressure (water pressure input side), the lowest air pressure, the smallest air volume and the lowest water pressure (output side) and thus the smallest amount of water for the atomization in the water nozzles.
• the individual pressure gradients are shown in the diagram according to the figurative representation with dashed, dotted and solid lines (41: water pressure in the central line 36, 42: water pressure on the output side or in the water line 32; 43: air pressure for the snow lance or pressure in the compressed air line 32). It is also conceivable to compensate for the pressures by additional measures such as reduction valves. All snow lances can be individually switched on and off by means of control means (not shown) as required. In the arrangement according to FIG. 15, all the snow lances 4, 4 ', 4 "and 4" are supplied with approximately the same air pressure 43. Also approximately constant runs the water pressure curve 42 for the snow lances.
• FIG. 17 shows a further variant in which a common unit 10 is provided for all snow lances.
• the feeding of the snow lances with compressed air takes place approximately analogously to the variant according to FIG. 15 with a common central air line fed by the unit 10, whereby all the snow lances 4, 4 ', 4'',4''' have the same air pressure 43 on the input side.
• the central unit 10 with a water jet gas compressor also serves as a pressure breaker. Pressure crushers can be used in snowmaking systems with large height difference for pressure reduction.
• the variant according to Figure 18 a central or common unit with a water jet gas compressor as a pressure breaker.
• the unit 10 is located relatively far above the snow lances 4 and 4 'connected to it.
• the unit 10 supplies the snow lances 4 and 4 'with the same air pressure and the same amount of air. Due to the difference in level, the water in this arrangement has a high pressure when it arrives at the snow lances.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Nozzles (AREA)

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Citations (8)

• 2009
  • 2009-05-05 EP EP09159428A patent/EP2249107A1/de not_active Withdrawn
• 2010
  • 2010-05-04 EP EP10715892A patent/EP2427704A1/de not_active Withdrawn
  • 2010-05-04 WO PCT/EP2010/056018 patent/WO2010128036A1/de active Application Filing

Patent Citations (8)

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