A method for producing substantially dendritic snow includes: a) supplying a flow of humid air (1) and a flow of cold air (9) into a substantially closed space (15, 16, 17) to mix the two air flows and create an atmosphere oversaturated with water within the space; b) forming ice crystals and allowi
A method for producing substantially dendritic snow includes: a) supplying a flow of humid air (1) and a flow of cold air (9) into a substantially closed space (15, 16, 17) to mix the two air flows and create an atmosphere oversaturated with water within the space; b) forming ice crystals and allowing snowflakes to grow from the oversaturated atmosphere, keeping the ice crystals and growing snowflakes floating within the space and allowing them to grow over a predetermined period of time sufficiently long to obtain snowflakes having a predefined size, the floating condition being achieved by moving the ice crystals and growing snowflakes, on average, along a substantially helical trajectory by the air flow, which results in the snowflakes being distributed according to their size along the substantially helical trajectory; and c) thereafter releasing the predefined size snowflakes via a release opening (7) of the space by a carrier air flow (3).
대표청구항▼
1. A method for producing substantially dendritic snow, comprising the following steps: a) supplying a flow of humid air and a flow of cold air into a substantially closed space in order to mix the two air flows therein and to form an atmosphere supersaturated with water within the substantially clo
1. A method for producing substantially dendritic snow, comprising the following steps: a) supplying a flow of humid air and a flow of cold air into a substantially closed space in order to mix the two air flows therein and to form an atmosphere supersaturated with water within the substantially closed space;b) forming ice crystals including ice crystal nuclei and allowing snowflakes to grow from the supersaturated atmosphere depositing onto surfaces of the ice crystal nuclei and then onto surfaces of the growing snowflakes within the substantially closed space while keeping the ice crystals and growing snowflakes within the substantially closed space in a floating condition and allowing them to grow for a predetermined period of time sufficient to obtain snowflakes of a predefined size; wherein the floating condition is achieved by moving the ice crystals and growing snowflakes, on average, along a substantially helical trajectory by the air flows, which results in the snowflakes being distributed according to their size along the substantially helical trajectory; andc) releasing substantially dendritic snowflakes having the predefined size after the predetermined period of time by a carrier air flow through a release opening of the substantially closed space. 2. The method according to claim 1, wherein, in step a) one or more additives for promoting the formation of ice crystals and/or the growth of snowflakes in step b) are supplied together with the flow of humid air and/or the flow of cold air. 3. The method according to claim 2, wherein ice crystal nuclei are supplied together with the flow of humid air and/or the flow of cold air in order to initiate the formation of ice crystals and/or to promote the growth of snowflakes. 4. The method according to claim 2, wherein at least one foaming agent is supplied together with the flow of humid air in order to form air bubbles, wherein the formation of ice crystals is initiated at a surface of the air bubbles. 5. The method according to claim 1, wherein in step a) at least one of the two air flows of humid and cold air is supplied into the substantially closed space from the bottom at an oblique angle. 6. The method according to claim 1, wherein in step a) at least one of the two air flows of humid and cold air is laterally supplied into the substantially closed space. 7. The method according to claim 6, wherein in step a) at least one of the two air flows of humid and cold air is supplied in a substantially tangential direction into the substantially closed space which is conical is conical in shape. 8. The method according to claim 1, wherein in step b) the growing snowflakes are moved along the substantially helical trajectory by at least one fan provided in the substantially closed space. 9. The method according to claim 1, wherein in step b) the predetermined period of time amounts to at least about 5 min. 10. The method according to claim 1, wherein in step b) the predefined size is in an order of that of dendritic snowflakes. 11. The method according to claim 1, wherein in step a) the flow of cold air has a temperature in a range of −100° C. to −5° C. 12. The method according to claim 1, wherein ambient air is supplied as the flow of cold air. 13. The method according to claim 1, wherein in step a) the flow of humid air has a temperature in a range of −5° C. to +10° C. 14. The method according to claim 1, wherein in step c) the subsantially dendritic snowflakes are released through a nozzle together with the carrier air flow. 15. The method according to claim 14, wherein the substantially dendritic snowflakes are released through a Venturi nozzle, which is operated using a flow of ambient air. 16. The method according to claim 1, wherein a surface of the substantially closed space is at least partially cooled and/or heated. 17. The method according to claim 1, wherein the supplied flow of humid air is heated before and/or while moisture is added thereto. 18. The method according to claim 17, including a cooling process and wherein waste heat of the cooling process is used for heating. 19. The method according to claim 1, wherein snow having a density of not more than 200 kg/m3 is produced. 20. A device for producing substantially dendritic snow using the method according to claim 1, the device comprising at least one substantially closed chamber which comprises: at least one first supply line for a flow of humid air and at least one second supply line for a flow of cold air into the substantially close space;three zones in fluid communication with one another including: a mixing zone, into which the at least one first supply line and the at least one second supply line lead, for mixing the flows of humid and cold air and optionally for forming ice crystal nuclei; a snowflake growth zone; and a release zone for releasing the substantially dendritic snowflakes;means for moving the ice crystal nuclei and snowflakes along the substantially helical trajectory, the moving means being provided in at least one of the three zones; anda release opening in fluid communication with the release zone. 21. The device according to claim 20, wherein at least one of the supply lines and/or at least one air flow control unit serves as the means for moving the ice crystal nuclei and snowflakes along a substantially helical trajectory. 22. The device according to claim 21, wherein at least one fan is provided as the air flow control unit. 23. The device according to claim 20, comprising a plurality of substantially closed chambers connected in series or in parallel. 24. The device according to claim 20, wherein the at least one substantially closed chamber is conical at least in a region of the release zone. 25. The device according to claim 24, wherein the at least one substantially closed chamber is conical in regions of the growth zone and the release zone. 26. The device according to claim 24, wherein the at least one substantially closed chamber is entirely conical. 27. The device according to claim 20, wherein the at least one first supply line for humid air and/or the at least one second supply line for cold air enters the mixing zone from the bottom at an oblique angle. 28. The device according to claim 20, wherein the at least one first supply line for humid air and/or the at least one supply line for cold air laterally enters the mixing zone and/or the growth zone. 29. The device according to claim 28, wherein the at least one first supply line for humid air and/or the at least one supply line for cold air enters the mixing zone and/or the growth zone in a substantially tangential direction, and wherein the mixing zone and/or the growth zone is conical in shape. 30. The device according to claim 20, wherein the release opening is a nozzle. 31. The device according to claim 30, wherein the nozzle is a Venturi nozzle. 32. The device according to claim 20, wherein entries of the at least one first supply line for humid air and the at least one second supply line for cold air into the mixing zone are positioned substantially next to each other, forming an angle of <180°. 33. The device according to claim 20, wherein entries of the at least one first supply line for humid air and the at least one second supply line for cold air into the mixing zone are positioned opposite each other, forming an angle of about 180°. 34. The device according to claim 20, wherein one of the at least one first supply line for humid air and the at least one second supply line for cold air is positioned within the other, optionally concentrically, such that the supply lines have a common entry point into the at least one substantially closed chamber. 35. The device according to claim 34, wherein the inner one of the two supply lines ends before the common entry point. 36. The device according to claim 20, wherein at least one part of the device, optionally at least one outer wall of the at least one substantially closed chamber and/or the at least one second supply line for cold air, is provided with a cooler and/or a heater. 37. The device according to claim 20, further comprising at least one heater for heating the humid air supplied thereto. 38. The device according to claim 20, wherein the device is transportable. 39. The device according to claim 20, wherein the at least one substantially closed chamber is at least partially made of a light-weight material selected from cloth, canvas, and plastic. 40. The device according to claim 20, wherein at least one substantially closed chamber is at least partially made of and/or lined with a material that inhibits growth of ice crystals.
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이 특허에 인용된 특허 (8)
Suga Nagaichi (Tokyo JPX) Katayanagi Shinichi (Tokyo JPX), Apparatus for changing artificial snow to wet snow.
Lawless John F. (753 Elizabeth Road Rydal PA 19046) Ohrin Leonard J. (2211 Hillthorpe St. Roslyn PA 19001) Emery William M. (36 Red Maple Lane Levittown PA 19055), Artificial snow making method.
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