CA1198904A - Snow gun - Google Patents
Snow gunInfo
- Publication number
- CA1198904A CA1198904A CA000419614A CA419614A CA1198904A CA 1198904 A CA1198904 A CA 1198904A CA 000419614 A CA000419614 A CA 000419614A CA 419614 A CA419614 A CA 419614A CA 1198904 A CA1198904 A CA 1198904A
- Authority
- CA
- Canada
- Prior art keywords
- supply line
- nozzles
- compressed
- air supply
- snow gun
- 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.)
- Expired
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
- B05B7/0433—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of gas surrounded by an external conduit of liquid upstream the mixing chamber
-
- 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
Abstract
ABSTRACT
The compressed air supply line of the snow gun passes through the center of the pressurized-water supply line.
The air line opens out into an interior space within the spray head, this space being bounded at the front end by a perforated end piece and serving as a pre-expansion chamber. For the purpose of saving on energy, the end piece has at least three centrosymmetrically disposed discharge openings.
The compressed air supply line of the snow gun passes through the center of the pressurized-water supply line.
The air line opens out into an interior space within the spray head, this space being bounded at the front end by a perforated end piece and serving as a pre-expansion chamber. For the purpose of saving on energy, the end piece has at least three centrosymmetrically disposed discharge openings.
Description
This invention relates to apparatus for ~aking and distributing snow, and more particularly to a snow gun of the type having a central compressed-air supply line and a pressurized-water supply line disposed coaxially witll and surrounding the compressed-air supply line, the latter opening out into an interior space, bounded at the front in the direction of the compressed-air feed by a perforated end piece and serving as a pre-expansion chamber, of a spray head.
The mode of operation of such a snow gun is essential-ly that a very low temperature develops in the pre-ex-pansion chamber, whereupon condensation nuclei are formed in the air-water mixture as ice particles about which the water already partially freeses into snow~ These con-densation nuclei are finally ejected or sprayed, together with still unfrozen water particles and compressed air not included in the snow-production process, through a single, central front bore in the end disk, snow being formed in front of this central bore with the aid of the condensation nuclei and the additionally developing cold due to expansion of the compressed air, with the inclusion of the cool ambient air.
Such prior art snow guns have two decisive drawbacks for which the arrangement`of a single central perforation of the end disk is responsible. Thus, one effect of this design is that the core of the concentrated stream of air does not participate at all in the conversion to snow for lack of sufficient atomization (or sufficient mixture with the water). The result, aside from the unused kinetic energy of the air stream, i.e., the unnecessary ~aste of the cold potential inherent therein, is a noise intensity so excessive that possibilities of utiliæing such equipment are severely limited~ A further result of the lacking or insufficient mixture of air and water ist that the emerging jet is surrounded by a sheath of droplets which simply precipitates onto the ground in front of the bore of the end disk as wate.r. Here again, energy is expended for accelerating the water without ultimately being converti~le into snow production, This waste of energy is all the more intolerable in connection with snow guns as co~side.rahle energy must in any case be applied in order to activate the cold potential of the ambient air as much as possible by means of a large throwing range.
It is therefore an object of this invention to provide an improved snow gun which achieves a substantially more favorable exploitation of energy by means of increased inclusion of the outside air in the mixing and condensation process, and this with a much lower noise level as compared with prior art snow guns.
To this end, in the snow gun according to the present invention, of the type initially mentioned, the end piece has at least three centrosymmetrically disposed discharge nozzles.
Accordingly, the invention is broa~dly claimed herein as a snow gun comprising: a central compressed-air supply line; a pressurized-water supply line disposed coaxially with and surrounding said compressed-air supply line; a spray head attached at one end to said pressurized-water supply line and including an interior space serving as a pre~expansion chamber; inner nozzles in said com-pressed-air supply line having central axes intersecting the central axis of said compressed air supply line and forming an acute angle therewith, said inner nozzles communicating with said pre-expansion chamber, and a perforated end piece attached to the other end of said spray head, bounding said interior space~ and including at least three centrosymmetrically disposed discharge nozzles.
A preferred e}~odiment of the invention.will now be described in detail with reference to the accompanying drawing, which is a partial perspective view showlng the spray head unscrewed and moved slightly away from the pressurized-water supply line for the sake of clarity.
A compressed-air duc~ 2, connected to a source of compressed air (not shown) by any suitable means, passes through inside a compressed-air supply line 1.
Duct 2 is closed at its front end by a plug 3. On the other hand, three lateral inner nozzle apertures 4 are provided which communicate with duct 2~ and the geometric or central axes of which intersect the geometric axis of duct 2 at an acute angle. Adjacent to plug 3 is a collar 5 which stands out perpendicular to the geometric or central axis of duct 2.
~isposed coaxially with compressed-air supply line 1 is the jacket 6 of a pressurized-water supply line, an internal thread 6a of which receives an external thread 7a of a spray head 7. When spray head 7 is screwed on, its inside wall together with an end piece 8 bound a pre-expansion chamber 9 communicating with the outside atmosphere via three centrosymmetrically disposed perforations 10 formin~ discharge nozzles, none of which is situated on the geometric or central axis of compressed-air supply line 1. Instead of the three perforations 10, any desired plurality of apertures might basically be provided, none of which must be situated on the geometric or central axis of supply line 1, however.
With the arrangement of three discharge nozzles having the same diameter and three identical inner nozzles, the diameter of a discharge nozzle equals ~rom 3~ one to three times the diameter of an inner nozzle. If ther~ are more than three discharge nozzles and three inner nozzles, the area of the cross-section of an outer discharge nozzle, multiplied by the number of outer discharge nozzles and divided by one to nine, is e~ual to the total area of the cross-sections of the inner nozzles.
The mode of operation of the snow gun according to the foregoing embodiment of the invention differs from that of the prior art snow guns, as described earlier, in that by means of the arran~ement of a plurality of perforations 10 offset with respect to the yeometric axis of the compressed-air supply line, a considerably ~etter mixture of water and air is made possible inasmuch as the outside air, which it i5 sought to utilize for the snow production, is swept alony between two discharge jets and mixes with these jets comparatively close to the nozzle..
_ 4 _ , :
The mode of operation of such a snow gun is essential-ly that a very low temperature develops in the pre-ex-pansion chamber, whereupon condensation nuclei are formed in the air-water mixture as ice particles about which the water already partially freeses into snow~ These con-densation nuclei are finally ejected or sprayed, together with still unfrozen water particles and compressed air not included in the snow-production process, through a single, central front bore in the end disk, snow being formed in front of this central bore with the aid of the condensation nuclei and the additionally developing cold due to expansion of the compressed air, with the inclusion of the cool ambient air.
Such prior art snow guns have two decisive drawbacks for which the arrangement`of a single central perforation of the end disk is responsible. Thus, one effect of this design is that the core of the concentrated stream of air does not participate at all in the conversion to snow for lack of sufficient atomization (or sufficient mixture with the water). The result, aside from the unused kinetic energy of the air stream, i.e., the unnecessary ~aste of the cold potential inherent therein, is a noise intensity so excessive that possibilities of utiliæing such equipment are severely limited~ A further result of the lacking or insufficient mixture of air and water ist that the emerging jet is surrounded by a sheath of droplets which simply precipitates onto the ground in front of the bore of the end disk as wate.r. Here again, energy is expended for accelerating the water without ultimately being converti~le into snow production, This waste of energy is all the more intolerable in connection with snow guns as co~side.rahle energy must in any case be applied in order to activate the cold potential of the ambient air as much as possible by means of a large throwing range.
It is therefore an object of this invention to provide an improved snow gun which achieves a substantially more favorable exploitation of energy by means of increased inclusion of the outside air in the mixing and condensation process, and this with a much lower noise level as compared with prior art snow guns.
To this end, in the snow gun according to the present invention, of the type initially mentioned, the end piece has at least three centrosymmetrically disposed discharge nozzles.
Accordingly, the invention is broa~dly claimed herein as a snow gun comprising: a central compressed-air supply line; a pressurized-water supply line disposed coaxially with and surrounding said compressed-air supply line; a spray head attached at one end to said pressurized-water supply line and including an interior space serving as a pre~expansion chamber; inner nozzles in said com-pressed-air supply line having central axes intersecting the central axis of said compressed air supply line and forming an acute angle therewith, said inner nozzles communicating with said pre-expansion chamber, and a perforated end piece attached to the other end of said spray head, bounding said interior space~ and including at least three centrosymmetrically disposed discharge nozzles.
A preferred e}~odiment of the invention.will now be described in detail with reference to the accompanying drawing, which is a partial perspective view showlng the spray head unscrewed and moved slightly away from the pressurized-water supply line for the sake of clarity.
A compressed-air duc~ 2, connected to a source of compressed air (not shown) by any suitable means, passes through inside a compressed-air supply line 1.
Duct 2 is closed at its front end by a plug 3. On the other hand, three lateral inner nozzle apertures 4 are provided which communicate with duct 2~ and the geometric or central axes of which intersect the geometric axis of duct 2 at an acute angle. Adjacent to plug 3 is a collar 5 which stands out perpendicular to the geometric or central axis of duct 2.
~isposed coaxially with compressed-air supply line 1 is the jacket 6 of a pressurized-water supply line, an internal thread 6a of which receives an external thread 7a of a spray head 7. When spray head 7 is screwed on, its inside wall together with an end piece 8 bound a pre-expansion chamber 9 communicating with the outside atmosphere via three centrosymmetrically disposed perforations 10 formin~ discharge nozzles, none of which is situated on the geometric or central axis of compressed-air supply line 1. Instead of the three perforations 10, any desired plurality of apertures might basically be provided, none of which must be situated on the geometric or central axis of supply line 1, however.
With the arrangement of three discharge nozzles having the same diameter and three identical inner nozzles, the diameter of a discharge nozzle equals ~rom 3~ one to three times the diameter of an inner nozzle. If ther~ are more than three discharge nozzles and three inner nozzles, the area of the cross-section of an outer discharge nozzle, multiplied by the number of outer discharge nozzles and divided by one to nine, is e~ual to the total area of the cross-sections of the inner nozzles.
The mode of operation of the snow gun according to the foregoing embodiment of the invention differs from that of the prior art snow guns, as described earlier, in that by means of the arran~ement of a plurality of perforations 10 offset with respect to the yeometric axis of the compressed-air supply line, a considerably ~etter mixture of water and air is made possible inasmuch as the outside air, which it i5 sought to utilize for the snow production, is swept alony between two discharge jets and mixes with these jets comparatively close to the nozzle..
_ 4 _ , :
Claims (4)
1. A snow gun comprising:
a central compressed-air supply line;
a pressurized-water supply line disposed coaxially with and surrounding said compressed-air supply line;
a spray head attached at one end to said pressurized-water supply line and including an interior space serving as a pre-expansion chamber;
inner nozzles in said compressed-air supply line having central axes intersecting the central axis of said compressed air supply line and forming an acute angle therewith, said inner nozzles communicating with said pre-expansion chamber, and a perforated end piece attached to the other end of said spray head, bounding said interior space, and including at least three centrosymmetrically disposed discharge nozzles.
a central compressed-air supply line;
a pressurized-water supply line disposed coaxially with and surrounding said compressed-air supply line;
a spray head attached at one end to said pressurized-water supply line and including an interior space serving as a pre-expansion chamber;
inner nozzles in said compressed-air supply line having central axes intersecting the central axis of said compressed air supply line and forming an acute angle therewith, said inner nozzles communicating with said pre-expansion chamber, and a perforated end piece attached to the other end of said spray head, bounding said interior space, and including at least three centrosymmetrically disposed discharge nozzles.
2. The snow gun of claim 1, comprising three said discharge nozzles of the same diameter, and further comprising three identical inner nozzles.
3. The snow gun of claim 2, wherein the diameter of said discharge nozzles equals from one to three times the total diameter of said inner nozzles.
4. The snow gun of claim 1 comprising more than three said discharge nozzles and further comprising more than three inner nozzles forming part of said compressed-air supply line and interconnecting the two said supply lines, wherein the area of the cross-section of any one of said discharge nozzles multiplied by the number of said discharge nozzles and divided by one to nine equals the total area of the cross-sections of said inner nozzles.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP82200056A EP0084186B1 (en) | 1982-01-18 | 1982-01-18 | Snow gun |
EP82200056.8 | 1982-01-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1198904A true CA1198904A (en) | 1986-01-07 |
Family
ID=8189451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000419614A Expired CA1198904A (en) | 1982-01-18 | 1983-01-17 | Snow gun |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0084186B1 (en) |
JP (1) | JPS58124562A (en) |
AT (1) | ATE24603T1 (en) |
CA (1) | CA1198904A (en) |
DE (1) | DE3274901D1 (en) |
ES (1) | ES8402068A1 (en) |
FI (1) | FI71005C (en) |
NO (1) | NO154322C (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2594528B1 (en) * | 1986-02-20 | 1988-07-15 | Petavit Ets | FLUID MIXING TIP FOR ARTIFICIAL SNOW MANUFACTURING APPARATUS |
JPS6453067A (en) * | 1987-08-20 | 1989-03-01 | Yanmar Diesel Engine Co | Ignition device for engine |
IT1289191B1 (en) | 1997-01-23 | 1998-09-29 | Leitner Spa | CANNON FOR THE PRODUCTION OF SNOW |
FR2783310B1 (en) * | 1998-09-11 | 2000-10-13 | Dicc Realisations Sa | SNOW GUN |
CN104174521B (en) * | 2014-09-11 | 2016-08-24 | 东莞安默琳机械制造技术有限公司 | A kind of frost prevention nozzle for low-temperature trace lubrication cutting |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2676471A (en) * | 1950-12-14 | 1954-04-27 | Tey Mfg Corp | Method for making and distributing snow |
US2942790A (en) * | 1959-01-23 | 1960-06-28 | Gen Electric | Air-atomizing liquid spray nozzle |
GB1104461A (en) * | 1963-09-27 | 1968-02-28 | Sames Mach Electrostat | Pneumatic atomizer for spraying liquids |
US3836076A (en) * | 1972-10-10 | 1974-09-17 | Delavan Manufacturing Co | Foam generating nozzle |
US4101073A (en) * | 1977-08-25 | 1978-07-18 | Spray Engineering Company | Two-fluid spray nozzle producing fine atomization of liquid |
DE2941052A1 (en) * | 1979-10-10 | 1981-03-12 | Heinz 8581 Heinersreuth Fischer | Artificial snow generator system - mixes water with compressed air cooled by expansion in convergent-divergent nozzle |
-
1982
- 1982-01-18 AT AT82200056T patent/ATE24603T1/en not_active IP Right Cessation
- 1982-01-18 DE DE8282200056T patent/DE3274901D1/en not_active Expired
- 1982-01-18 EP EP82200056A patent/EP0084186B1/en not_active Expired
-
1983
- 1983-01-12 FI FI830107A patent/FI71005C/en not_active IP Right Cessation
- 1983-01-17 CA CA000419614A patent/CA1198904A/en not_active Expired
- 1983-01-17 ES ES519055A patent/ES8402068A1/en not_active Expired
- 1983-01-17 NO NO830146A patent/NO154322C/en not_active IP Right Cessation
- 1983-01-18 JP JP58006533A patent/JPS58124562A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0084186A1 (en) | 1983-07-27 |
ATE24603T1 (en) | 1987-01-15 |
NO154322B (en) | 1986-05-20 |
NO154322C (en) | 1986-08-27 |
FI830107A0 (en) | 1983-01-12 |
JPS6340587B2 (en) | 1988-08-11 |
NO830146L (en) | 1983-07-19 |
ES519055A0 (en) | 1984-01-01 |
FI71005C (en) | 1986-10-27 |
DE3274901D1 (en) | 1987-02-05 |
EP0084186B1 (en) | 1986-12-30 |
ES8402068A1 (en) | 1984-01-01 |
FI71005B (en) | 1986-07-18 |
FI830107L (en) | 1983-07-19 |
JPS58124562A (en) | 1983-07-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0824658B1 (en) | Fanless snow gun | |
JPH04271860A (en) | Cone-shaped air atomizing nozzle assembly | |
EP1160015A3 (en) | Air assisted spray nozzle assembly | |
GB1600631A (en) | Spray nozzle | |
CA2160095A1 (en) | Internal mix air atomizing spray nozzle | |
US4801090A (en) | Discharge pipe and discharge apparatus using the same | |
WO2004087329A8 (en) | Nozzles | |
CA1198904A (en) | Snow gun | |
US4491273A (en) | Snow gun | |
WO1997001392A1 (en) | Water atomizing nozzle for snow making machine | |
US4480788A (en) | Snow gun | |
EP0544087B1 (en) | Low pressure fumeless spray gun | |
JP2003220354A (en) | Spray nozzle | |
SU1389785A1 (en) | Generator of gas and mechanical froth | |
EP0855564B1 (en) | Snow production cannon | |
JPH10244016A (en) | Fire nozzle and removable deflector of fire nozzle | |
JPH0674627A (en) | Snow falling machine | |
RU2141082C1 (en) | Device for making artificial snow | |
EP0108153A1 (en) | Method and device for injecting high pressure water for facility or the like on roadside | |
FR2783310B1 (en) | SNOW GUN | |
RU2137061C1 (en) | Device for production of artificial snow | |
JPS5924560A (en) | Water and air spray nozzle | |
JP2791268B2 (en) | Snowfall nozzle | |
JPH0769102B2 (en) | Snow machine | |
JPH07198238A (en) | Snow producing nozzle of artificial-snow spray machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |