JPH06257916A - Artificial snow falling device and method - Google Patents
Artificial snow falling device and methodInfo
- Publication number
- JPH06257916A JPH06257916A JP4107993A JP4107993A JPH06257916A JP H06257916 A JPH06257916 A JP H06257916A JP 4107993 A JP4107993 A JP 4107993A JP 4107993 A JP4107993 A JP 4107993A JP H06257916 A JPH06257916 A JP H06257916A
- Authority
- JP
- Japan
- Prior art keywords
- water
- pressure air
- water droplets
- high pressure
- snow
- 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.)
- Pending
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Special Spraying Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、人工降雪方法及び装置
に関し、とくに屋内及び屋外の人工スキー場のゲレンデ
に人工雪を造る人工降雪方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial snowfall method and apparatus, and more particularly to an artificial snowfall method and apparatus for making artificial snow on the slopes of indoor and outdoor artificial ski areas.
【０００２】[0002]
【従来の技術】従来の人工降雪においては、氷点下の空
気中に二流体又は一流体ノズルを用いて霧状の水滴を噴
霧することにより雪を造っていた。噴霧する水滴の粒径
が大きいと、氷点下の空気中で氷結しにくく、たとえ氷
結したとしても水分が多くスキーの滑走に適さない雪と
なるため、噴霧する水滴の粒径を空気中で氷結可能な程
度に小さくする必要がある。2. Description of the Related Art In conventional artificial snowfall, snow is produced by spraying mist-like water droplets into the air below freezing using a two-fluid or one-fluid nozzle. If the size of the water droplets to be sprayed is large, it is difficult to freeze in the air below freezing, and even if it freezes, it will be snow that is not suitable for skiing, so the size of the sprayed water droplets can freeze in the air. It is necessary to make it small.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来のノズル
による噴霧では粒径の均一な水滴を造ることが困難であ
ったので、粒径を氷結可能な程度に小さくするときは、
いきおい目的粒径より細かい水滴の発生が避けられなか
った。粒径が細かい水滴は、飛散し易いため目的とする
場所へ降雪させることが難しい。とくに、屋内空気を循
環して冷却する空調機械室を有する屋内人工スキー場に
おいては、細かい人工雪がゲレンデ内に降雪せずに循環
空気と共に機械室まで運ばれることがある。機械室へ運
ばれた人工雪は、空気冷却機の熱交換器に付着して冷却
機の性能を低下させるので、冷却機の定期的なデフロス
ト（霜取り）運転が必要となり、また機械室への人工雪
侵入防止用フィルターを屋内のリターンチャンバーに設
ける等の対策が必要とされていた。However, since it was difficult to form water droplets having a uniform particle diameter by spraying with a conventional nozzle, when the particle diameter is made small enough to freeze,
The generation of water droplets smaller than the intended particle size was inevitable. Water droplets with a small particle size are easily scattered, making it difficult to make snowfall at the intended location. Particularly, in an indoor artificial ski resort having an air conditioning machine room that circulates and cools indoor air, fine artificial snow may be carried to the machine room together with the circulating air without snowfall on the slope. Artificial snow carried to the machine room adheres to the heat exchanger of the air cooler and reduces the performance of the cooler, so it is necessary to perform regular defrost (defrost) operation of the cooler. It was necessary to take measures such as installing an artificial snow infiltration filter in the indoor return chamber.
【０００４】そこで本発明の目的は、「粒径の揃った雪
を造る人工降雪方法及び装置」を提供するにある。Therefore, an object of the present invention is to provide "an artificial snowfall method and device for producing snow having a uniform grain size".
【０００５】[0005]
【課題を解決するための手段】本発明者は、超音波によ
る液体の霧化技術に注目した。図３(Ａ)を参照するに、
超音波を放射する面上に液体を薄く広げた場合には、放
射する超音波の波長に応じた波長の毛細波(キャピラリ
ーウェーブ)が液体表面に励起され、毛細波から粒径の
揃った水滴が発生する（総合技術センター発行、森栄司
監修、最新超音波技術、pp.255〜258）。水滴の粒径
は、毛細波を励起する超音波の周波数により定まる。本
発明者は、この霧化技術を用いて粒径の揃った雪を造る
ことに成功した。The present inventor has paid attention to an atomization technique of liquid by ultrasonic waves. Referring to FIG. 3 (A),
When the liquid is spread thinly on the surface that emits ultrasonic waves, a capillary wave with a wavelength that corresponds to the wavelength of the emitted ultrasonic waves (capillary wave) is excited on the liquid surface, and water droplets with uniform particle size are generated from the capillary waves. Occurs (Published by General Technology Center, supervised by Eiji Mori, latest ultrasonic technology, pp.255-258). The particle size of the water droplet is determined by the frequency of the ultrasonic wave that excites the capillary wave. The present inventor succeeded in producing snow having a uniform grain size by using this atomization technique.
【０００６】図１の実施例を参照するに、本発明の人工
降雪方法は、超音波発生装置１の振動子２が発生する所
定周波数の超音波の放射面５上に冷水10を流出させ、超
音波により冷水10を粒径の揃った水滴９とし、高圧空気
11を冷水10の流出位置近傍に噴出し、高圧空気11の噴流
により水滴９を０゜C以下の低温空間へ噴霧してなる。好
ましくは、水滴９の粒径を0.05〜0.2mmとする。Referring to the embodiment of FIG. 1, in the artificial snowfall method of the present invention, cold water 10 is caused to flow out onto a radiation surface 5 of ultrasonic waves of a predetermined frequency generated by a vibrator 2 of an ultrasonic generator 1. Cold water 10 is made into droplets 9 of uniform particle size by ultrasonic waves, and high pressure air
11 is jetted near the outflow position of the cold water 10, and the water droplets 9 are sprayed by a jet of high-pressure air 11 into a low temperature space below 0 ° C. Preferably, the particle size of the water droplet 9 is 0.05 to 0.2 mm.
【０００７】本発明の人工降雪装置30は、振動子２から
の所定周波数の超音波を放射する放射面５を有する超音
波発生装置１、放射面５に臨む開口８を有する送水管
７、及び送水管７の開口近傍に開口する高圧空気ノズル
12を備え、放射面５で粒径の揃った水滴９を発生させ、
水滴９を高圧空気ノズル12からの高圧空気流により水滴
９と空気の混合噴霧流として噴出してなる。好ましく
は、水滴９の粒径を0.05〜0.2mmとする。The artificial snowfall device 30 of the present invention includes an ultrasonic wave generator 1 having a radiation surface 5 for radiating ultrasonic waves of a predetermined frequency from the vibrator 2, a water pipe 7 having an opening 8 facing the radiation surface 5, and High-pressure air nozzle that opens near the opening of the water supply pipe 7
12 is provided to generate water droplets 9 having a uniform particle diameter on the radiation surface 5,
The water droplets 9 are ejected as a mixed spray flow of the water droplets 9 and air by the high pressure air flow from the high pressure air nozzle 12. Preferably, the particle size of the water droplet 9 is 0.05 to 0.2 mm.
【０００８】[0008]
【作用】本発明に使用する振動子２は、例えば電気信号
に応じて所定周波数の超音波を発生する磁歪振動子又は
電歪振動子であり、振動子２で発生した超音波は超音波
発生装置１内の空気を伝わって放射面５を振動させる。
これらの振動子２を組込んだ超音波発生装置１は公知技
術に属する。放射する超音波が弱い場合には、図１の実
施例に示すように振幅拡大のためにホーン３を設け、ホ
ーン３の一端を放射面５としてもよい。The vibrator 2 used in the present invention is, for example, a magnetostrictive vibrator or an electrostrictive vibrator that generates an ultrasonic wave of a predetermined frequency according to an electric signal. The ultrasonic wave generated by the vibrator 2 is an ultrasonic wave. The radiation surface 5 is vibrated along the air in the device 1.
The ultrasonic wave generator 1 incorporating these vibrators 2 belongs to the known art. When the emitted ultrasonic waves are weak, a horn 3 may be provided for expanding the amplitude as shown in the embodiment of FIG. 1, and one end of the horn 3 may serve as the emitting surface 5.
【０００９】図１の実施例を参照するに、放射面５上に
流出された冷水10は、放射面５上で薄い水膜６を形成
し、超音波により水膜６の表面に毛細波が励起されて粒
径の揃った水滴９となる。水滴９をそのまま氷点下の低
温空間へ噴射する場合には、低温空気との熱交換のみに
より水滴９の冷却が行なわれるので、水滴９が過冷却と
なり凍結が困難となることもある。そこで冷水10の噴射
位置近傍に高圧空気11を噴出し、水滴９を高圧空気11と
の混合噴霧流として氷点下の低温空間へ放出し、高圧空
気の断熱膨張を利用して過冷却を破ることにより水滴９
を凍結させて雪を造る。Referring to the embodiment of FIG. 1, the cold water 10 flowing out onto the radiation surface 5 forms a thin water film 6 on the radiation surface 5, and ultrasonic waves generate capillary waves on the surface of the water film 6. The water droplets 9 are excited and have uniform particle diameters. When the water droplet 9 is jetted as it is to the low-temperature space below freezing, the water droplet 9 is cooled only by heat exchange with the low-temperature air, so that the water droplet 9 may be overcooled and may be difficult to freeze. Therefore, by ejecting high-pressure air 11 near the injection position of the cold water 10 and discharging the water droplets 9 as a mixed spray flow with the high-pressure air 11 to a low-temperature space below freezing, the adiabatic expansion of the high-pressure air is used to break supercooling. Water drop 9
Freeze and make snow.
【００１０】従って、本発明の目的である「粒径の揃っ
た雪を造る人工降雪方法及び装置の提供」が達成でき
る。Therefore, it is possible to achieve the object of the present invention, "to provide an artificial snowfalling method and apparatus for producing snow having a uniform grain size".
【００１１】また、超音波の周波数と冷水10の水量を調
節して水滴の粒径を0.05〜0.2mmとすれば、氷点下の低
温空間でより確実に雪を造ることができ、且つスキーの
滑走に適した均質の人工雪とすることができる。更に好
ましくは、低温空間の温度を氷点下数゜C以下とする。Further, if the frequency of ultrasonic waves and the amount of cold water 10 are adjusted so that the diameter of the water droplets is 0.05 to 0.2 mm, snow can be made more reliably in a low temperature space below freezing, and skiing can be performed smoothly. It can be a homogeneous artificial snow suitable for. More preferably, the temperature of the low temperature space is set to several degrees Celsius below freezing.
【００１２】[0012]
【実施例】図１は、超音波を増幅するために先を細くし
たホーン３を設け、その縮径端を放射面５とした本発明
の実施例を示す。振動子２は、ケーブル4aにより超音波
発振器４と接続される。発振器４の出力信号の周波数を
変えることにより、振動子２の発生する超音波の周波数
を調節することができる。FIG. 1 shows an embodiment of the present invention in which a tapered horn 3 is provided for amplifying ultrasonic waves and the diameter-reducing end of the horn 3 is used as a radiation surface 5. The vibrator 2 is connected to the ultrasonic oscillator 4 by a cable 4a. By changing the frequency of the output signal of the oscillator 4, the frequency of the ultrasonic wave generated by the vibrator 2 can be adjusted.
【００１３】水槽16で冷却した冷水10を、水量調節弁17
を設けた送水管７を通して放射面５上へ流出させる。必
要に応じ、送り出しポンプ18を設けてもよい。図示例で
は、ホーン３の大径口端側からホーン３の内側中心軸を
通り放射面５へ連通する送水管７を設け、冷水10を超音
波発生装置１の内側から放射面５上へ流出させている。
但し、本発明の送水管７は図示例に限定されるものでは
なく、超音波発生装置１の外側から放射面５上へ冷水10
を供給する構造としてもよい。超音波発生装置１の内側
から冷水10を流出させる場合、送水管７の中心部で水膜
が薄く形成されないため図３(Ｂ)に示すように水滴９の
粒度分布が広がる傾向はあるが、一定分布範囲内で理論
値に近い粒径の揃った水滴のできることが確認されてい
る（前掲最新超音波技術、p.257）。本発明者は、振動
子２から周波数10kHz〜３MHzの超音波、とくに周波数10
〜100kHzの超音波を発生させたときに、水量を１〜30リ
ットル/minの範囲で適当に調節することにより、粒径0.
05〜0.2mmの範囲内で選択可能なほぼ均一な粒径の水
滴、例えば粒径0.1mmの水滴を噴霧することができるこ
とを確認した。The cold water 10 cooled in the water tank 16 is supplied with a water quantity control valve 17
It is made to flow out on the radiation surface 5 through the water supply pipe 7 provided with. A delivery pump 18 may be provided if necessary. In the illustrated example, a water supply pipe 7 is provided which communicates with the radiation surface 5 from the large-diameter mouth end side of the horn 3 through the inner central axis of the horn 3, and the cold water 10 flows out from the inside of the ultrasonic generator 1 onto the radiation surface 5. I am letting you.
However, the water supply pipe 7 of the present invention is not limited to the illustrated example, and the cold water 10 is supplied from the outside of the ultrasonic wave generator 1 onto the radiation surface 5.
May be provided. When the cold water 10 is caused to flow out from the inside of the ultrasonic generator 1, since the water film is not thinly formed in the central portion of the water supply pipe 7, the particle size distribution of the water droplets 9 tends to widen as shown in FIG. 3 (B). It has been confirmed that water droplets with a uniform particle size close to the theoretical value can be formed within a certain distribution range (Latest Ultrasonic Technology, p.257). The inventor of the present invention has found that ultrasonic waves with a frequency of 10 kHz to 3 MHz from the oscillator 2,
When ultrasonic waves of up to 100 kHz are generated, the particle size is adjusted to 0 by adjusting the amount of water appropriately within the range of 1 to 30 liters / min.
It was confirmed that it was possible to spray water droplets having a substantially uniform particle size selectable within the range of 05 to 0.2 mm, for example, a water particle having a particle size of 0.1 mm.
【００１４】圧縮機20により例えば圧力５kg/cm2程度と
し、レシーバタンク21に蓄積して冷却した高圧空気11
を、弁22及び放射面５の外周に設けた高圧ノズル12を介
し、水滴９が形成される送水管７の開口８近傍の空気ノ
ズル開口13から噴出させる。こうして噴出させた高圧空
気流11により、水滴９を高圧空気11と混合して氷点下の
低温空間へ噴霧させる。噴霧させた水滴９は、低温空気
との熱交換及び高圧空気11の断熱膨張により粒径の揃っ
た雪となる。High pressure air 11 which has been cooled by being stored in the receiver tank 21 at a pressure of about 5 kg / cm 2 by the compressor 20, for example.
Through the valve 22 and the high pressure nozzle 12 provided on the outer circumference of the radiating surface 5, and is ejected from the air nozzle opening 13 near the opening 8 of the water supply pipe 7 where the water droplet 9 is formed. The high-pressure air stream 11 thus jetted mixes the water droplets 9 with the high-pressure air 11 and sprays them into a low-temperature space below freezing. The sprayed water droplets 9 become snow with a uniform particle diameter due to heat exchange with the low temperature air and adiabatic expansion of the high pressure air 11.
【００１５】図２に示す本発明の実施例は、送風機25と
図１の人工降雪装置30の複数台とを組み合わせたもので
ある。図示例の送風機25は大型であり、各人工降雪装置
30における水滴９と圧縮空気11との混合噴霧流の噴出方
向からみて超音波の放射面５より上流の位置に設けられ
たファンを有し、例えば流量1500m3/minの風を各人工降
雪装置30から噴出される混合噴霧流へ送風し、その噴霧
流をまとめて降雪すべき場所まで吹き出している。但
し、小型の送風機25を各人工降雪装置30に設けてもよ
い。本発明による水滴９は、粒径が揃っているので送風
の際に不所望の方向へ飛散することがほとんどなく、ほ
ぼ狙った場所へ降雪させることができる。図示例では、
複数台の人工降雪装置30の使用により混合噴霧流の総噴
出量を大きくし、大きな降雪量を実現している。The embodiment of the present invention shown in FIG. 2 is a combination of a blower 25 and a plurality of artificial snowfall devices 30 of FIG. The blower 25 in the illustrated example is large, and each artificial snowfall device
The artificial snowfall device has a fan provided at a position upstream of the ultrasonic radiation surface 5 as viewed from the jet direction of the mixed spray flow of the water droplets 9 and the compressed air 11 in 30, for example, a wind with a flow rate of 1500 m 3 / min. The mixed spray stream jetted from 30 is blown, and the spray stream is collectively blown to the place where it should snow. However, a small blower 25 may be provided in each artificial snowfall device 30. Since the water droplets 9 according to the present invention have uniform particle diameters, they hardly scatter in an undesired direction during air blowing, and snow can be almost snowfall to a target location. In the example shown,
By using a plurality of artificial snowfall devices 30, the total jetting amount of the mixed spray flow is increased and a large snowfall amount is realized.
【００１６】[0016]
【発明の効果】以上詳細に説明したように、本発明の人
工降雪方法及び装置は、所定周波数の超音波を放射する
放射面に冷水を流出させて粒径の揃った水滴とし、水滴
を高圧空気と共に０゜C以下の低温空間へ噴霧してなる構
成を用いるので、以下に述べる顕著な効果を奏する。 (１)雪片の粒径をほぼ均一にし、所望方向外へほとんど
飛散させることなく降雪させることができる。このため
過小雪片の発生を防止し、循環式空調機を用いる屋内人
工スキー場においてリターンチャンバーを通り機械室へ
侵入する雪の量を大幅に削減するので、冷凍機のデフロ
スト運転の頻度を低減することができる。また、リター
ンチャンバーに従来設けられていた人工雪侵入防止用フ
ィルターを不要にする。 (２)ゲレンデ内の所望位置へ局所的に降雪させることが
できる。 (３)スキーの滑走に適したほぼ均質な人工雪のゲレンデ
を造ることができる。As described in detail above, the artificial snowfall method and device of the present invention is characterized in that cold water is made to flow out to a radiation surface that radiates ultrasonic waves of a predetermined frequency to form water droplets having a uniform particle size, and the water droplets are high pressure. Since a structure in which air is sprayed into a low temperature space of 0 ° C. or less is used, the following remarkable effects are achieved. (1) The particle size of snowflakes can be made substantially uniform, and snow can be snowed with almost no scattering outside the desired direction. For this reason, the amount of snow that passes through the return chamber and enters the machine room at indoor artificial ski resorts that use a circulation type air conditioner is greatly reduced by preventing the generation of undersized snowflakes, thus reducing the frequency of defrost operation of the refrigerator. be able to. Also, the artificial snow intrusion prevention filter conventionally provided in the return chamber becomes unnecessary. (2) Snow can be locally caused to fall on a desired position on the slope. (3) It is possible to create an almost uniform artificial snow slope suitable for skiing.
【図１】は、本発明の一実施例の説明図である。FIG. 1 is an explanatory diagram of an embodiment of the present invention.
【図２】は、本発明の他の実施例の説明図である。FIG. 2 is an explanatory diagram of another embodiment of the present invention.
【図３】は、超音波による液滴生成の説明図である。FIG. 3 is an explanatory diagram of droplet generation by ultrasonic waves.
１ 超音波発生装置 ２ 振動子 ３
ホーン ４ 超音波発振器 4a ケ−ブル ５
放射面 ６ 水膜 ７ 送水管 ８
開口 ９ 水滴 10 冷水 11
高圧空気 12 高圧空気ノズル 13 空気ノズル開口 16
水槽 17 水量調節弁 18 ポンプ 20
圧縮機 21 レシーバタンク 22 弁 25
送風機 30 人工降雪装置。1 Ultrasonic generator 2 Transducer 3
Horn 4 Ultrasonic oscillator 4a Cable 5
Radiation surface 6 Water film 7 Water pipe 8
Opening 9 Water drop 10 Cold water 11
High pressure air 12 High pressure air nozzle 13 Air nozzle opening 16
Water tank 17 Water flow control valve 18 Pump 20
Compressor 21 Receiver tank 22 Valve 25
Blower 30 Artificial snowfall device.
Claims (5)
周波数の超音波の放射面上に冷水を流出させ、前記超音
波により前記冷水を粒径の揃った水滴とし、高圧空気を
前記冷水の流出位置近傍に噴出し、前記高圧空気の噴流
により前記水滴を０゜C以下の低温空間へ噴霧してなる人
工降雪方法。1. The cold water is caused to flow out onto a radiation surface of ultrasonic waves of a predetermined frequency generated by a vibrator of an ultrasonic wave generation device, the cold water is made into water droplets having a uniform particle size, and high pressure air is used as the cold water. The artificial snowfall method in which the water droplets are ejected in the vicinity of the outflow position, and the water droplets are sprayed into a low temperature space of 0 ° C or less by the jet of the high-pressure air.
水滴の粒径を0.05〜0.2mmとしてなる人工降雪方法。2. The artificial snowfall method according to claim 1, wherein the water droplets have a particle size of 0.05 to 0.2 mm.
する放射面を有する超音波発生装置、前記放射面に臨む
開口を有する送水管、及び前記送水管の開口近傍に開口
する高圧空気ノズルを備え、前記放射面で粒径の揃った
水滴を発生させ、前記水滴を前記高圧空気ノズルからの
高圧空気流により水滴と空気の混合噴霧流として噴出し
てなる人工降雪装置。3. An ultrasonic generator having an emitting surface for emitting ultrasonic waves of a predetermined frequency from a vibrator, a water supply pipe having an opening facing the emitting surface, and a high-pressure air nozzle opening near the opening of the water supply pipe. An artificial snowfall device comprising: a water droplet having a uniform particle diameter on the radiation surface, and ejecting the water droplet as a mixed spray flow of the water droplet and air by a high pressure air flow from the high pressure air nozzle.
水滴の粒径を0.05〜0.2mmとしてなる人工降雪装置。4. The artificial snowfall device according to claim 3, wherein the water droplets have a particle size of 0.05 to 0.2 mm.
て、前記混合噴霧流の噴出方向からみて前記放射面より
上流の位置に前記混合噴霧流へ送風する送風機を設けて
なる人工降雪装置。5. The artificial snowfall device according to claim 3 or 4, wherein a blower for sending air to the mixed spray flow is provided at a position upstream of the emission surface when viewed from the jetting direction of the mixed spray flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4107993A JPH06257916A (en) | 1993-03-02 | 1993-03-02 | Artificial snow falling device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4107993A JPH06257916A (en) | 1993-03-02 | 1993-03-02 | Artificial snow falling device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06257916A true JPH06257916A (en) | 1994-09-16 |
Family
ID=12598461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4107993A Pending JPH06257916A (en) | 1993-03-02 | 1993-03-02 | Artificial snow falling device and method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06257916A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006000797A (en) * | 2004-06-21 | 2006-01-05 | Honda Electronic Co Ltd | Ultrasonic cleaning apparatus |
| JP2015141112A (en) * | 2014-01-29 | 2015-08-03 | エスペック株式会社 | Environmental testing apparatus and snowfall spray nozzle |
| CN113883769A (en) * | 2021-09-18 | 2022-01-04 | 西安交通大学 | Snow making system applying ultrasonic coagulation tank and control method |
-
1993
- 1993-03-02 JP JP4107993A patent/JPH06257916A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006000797A (en) * | 2004-06-21 | 2006-01-05 | Honda Electronic Co Ltd | Ultrasonic cleaning apparatus |
| JP4669926B2 (en) * | 2004-06-21 | 2011-04-13 | 本多電子株式会社 | Ultrasonic cleaning equipment |
| JP2015141112A (en) * | 2014-01-29 | 2015-08-03 | エスペック株式会社 | Environmental testing apparatus and snowfall spray nozzle |
| CN113883769A (en) * | 2021-09-18 | 2022-01-04 | 西安交通大学 | Snow making system applying ultrasonic coagulation tank and control method |
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