JPH0611223A - Method for maintaining snow layer - Google Patents

Abstract

PURPOSE:To keep the surface of snow layer in an indoor skiing ground using artificial snow in desired state by maintaining the coefficient of kinetic friction of the snow layer surface at a desired value. CONSTITUTION:Air (Ar) over snow layer is humidified by a humidification device 5, and thereby moisture sublimation from the snow layer (S) to the air is prevented. While the moisture sublimation is prevented, outputs from snow layer cooling devices 3a, 3b are controlled so that the surface temperatures (tsa) and (tsb) of the snow layer (S) can be regulated to target temperatures (tssa) and (tssb) that correspond to desired surface property of the snow layer. Counteracting the moisture sublimation from the snow layer (S) to the air, the snow layer (S) is replenished with moisture by sprinkling water over the snow layer (S).

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、屋内人工雪スキー場等
で適用する雪層維持方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow layer maintenance method applied to an indoor artificial snow ski resort or the like.

【０００２】[0002]

【従来の技術】雪層の維持については、雪層の表面温度
を調整するとともに、雪層表面への水分凝結や着霜によ
る雪層表面の性状変化を防止すべく減湿手段により雪層
上空気を減湿するものを先に提案した（特願平２−１５
８４２６号参照）。2. Description of the Related Art In order to maintain a snow layer, the surface temperature of the snow layer is adjusted, and the dehumidifying means is used to prevent changes in the properties of the snow layer surface due to moisture condensation and frost formation. We first proposed a device that dehumidifies the air (Japanese Patent Application No. 2-15).
8426).

【０００３】[0003]

【発明が解決しようとする課題】ところで、雪層表面の
性状変化は、雪層の表面温度によって雪層表面の動摩擦
係数等物性そのものが変化することにより生じ、また、
雪層の表面温度と雪層上空気の湿度との関係により決ま
る雪層と空気との間での水分移動によっても生じるが、
屋外の雪層は言うまでもなく屋内の雪層においても低温
低湿季における大気状態によっては、雪層上空気が低湿
となって雪層中の水分が空気中へ昇華し、この水分昇華
による雪層表面の性状変化のためにスキー目的において
所望の滑走性が得られなくなる等のことが生じ、これに
対しては従来全く対処できなかった。The change in the properties of the snow layer surface is caused by the change in the physical properties such as the dynamic friction coefficient of the snow layer surface due to the surface temperature of the snow layer.
It is also caused by water movement between the snow layer and air, which is determined by the relationship between the surface temperature of the snow layer and the humidity of the air above the snow layer.
Depending on the atmospheric conditions in the low temperature and low humidity season, not only the outdoor snow layer but also the indoor snow layer, the air above the snow layer becomes low humidity and the moisture in the snow layer sublimes into the air. Due to the change in the properties, the desired gliding properties for skiing purposes may not be obtained, which has been impossible to deal with in the past.

【０００４】殊に、含水させてゲル状態で凍結させた水
膨潤性ポリマの粒子を素材とする人工雪では、ポリマ中
水分の昇華により凍結ゲルの性状が変化してしまうた
め、氷粒子のみからなる人工雪に比べ特に上記の問題が
顕著であった。In particular, in artificial snow made of water-swellable polymer particles that are hydrous and frozen in a gel state, the properties of the frozen gel change due to sublimation of water in the polymer, so that only the ice particles are used. The above-mentioned problems were more remarkable than the artificial snow.

【０００５】本発明の目的は、上記の問題を解消して、
所望の雪面性状を維持できるようにする点にある。An object of the present invention is to solve the above problems,
The point is to be able to maintain the desired snow surface properties.

【０００６】[0006]

【課題を解決するための手段】本第１発明による雪層維
持方法の特徴構成は、加湿手段により雪層上空気を加湿
して雪層から空気中への水分昇華を防止し、この水分昇
華防止状態で、雪層冷却手段の出力を調整して前記雪層
の表面温度を目標温度に調整することにある。The snow layer maintaining method according to the first aspect of the present invention is characterized in that the humidifying means humidifies the air above the snow layer to prevent sublimation of water from the snow layer into the air. In the prevention state, the output of the snow layer cooling means is adjusted to adjust the surface temperature of the snow layer to the target temperature.

【０００７】また、本第２発明による雪層維持方法の特
徴構成は、雪層冷却手段の出力を調整して雪層の表面温
度を目標温度に調整し、この調整下において、前記雪層
から空気中への水分昇華に対し、前記雪層へ散水して前
記雪層に水分補充することにある。Further, the snow layer maintaining method according to the second aspect of the present invention is characterized in that the output of the snow layer cooling means is adjusted to adjust the surface temperature of the snow layer to a target temperature. In response to sublimation of water in the air, water is replenished in the snow layer by watering the snow layer.

【０００８】[0008]

【作用】つまり、上記の第１発明、及び、第２発明のい
ずれの特徴構成においても、雪層の表面温度によって雪
層表面の動摩擦係数等物性が変化することに対しては、
所望の雪面性状が得られる雪層表面温度を目標温度とし
て、雪層冷却手段の出力調整により雪層の表面温度をそ
の目標温度に調整することで、雪層の表面温度が種々の
要因により変化することによる雪層表面の性状変化を防
止する。That is, in any of the characteristic configurations of the first invention and the second invention described above, the physical properties such as the dynamic friction coefficient of the snow layer surface change depending on the surface temperature of the snow layer,
By setting the snow layer surface temperature at which the desired snow surface property is obtained as the target temperature, the surface temperature of the snow layer is adjusted to various values by adjusting the surface temperature of the snow layer to the target temperature by adjusting the output of the snow layer cooling means. Prevents changes in the properties of the snow layer surface due to changes.

【０００９】そして、上記の第１発明の特徴構成におい
ては、雪層上空気の水蒸気分圧が低下するほど水分昇華
が促進されることに対し、雪層上空気を加湿することに
より、所望の雪面性状を得るべく目標温度に調整する雪
層表面からの水分昇華を防止して、水分昇華による雪層
表面の性状変化を防止する。In the above-mentioned characteristic configuration of the first aspect of the invention, moisture sublimation is promoted as the water vapor partial pressure of the air above the snow layer decreases, whereas the air above the snow layer is humidified to achieve the desired value. The sublimation of water from the surface of the snow layer, which is adjusted to a target temperature in order to obtain the properties of the snow surface, is prevented, and the property of the surface of the snow layer is prevented from changing due to the sublimation of water.

【００１０】一方、上記の第２発明の特徴構成において
は、雪層から空気中への水分昇華による雪層表面の性状
変化、すなわち、雪層表面の乾燥化による性状変化に対
し、雪層へ散水して雪層に水分を補充することで雪層表
面の性状を回復させ、これにより、所望の雪面性状を得
るべく目標温度に調整する雪層表面での水分昇華による
性状変化を防止する。On the other hand, in the above-mentioned characteristic configuration of the second aspect of the invention, the change in the properties of the surface of the snow layer due to the sublimation of water from the snow layer into the air, that is, the changes in the properties of the surface of the snow layer due to drying, changes By spraying water and replenishing the snow layer with water, the properties of the surface of the snow layer are restored, thereby adjusting the target temperature to obtain the desired snow surface properties. Preventing property changes due to water sublimation on the surface of the snow layer. .

【００１１】[0011]

【発明の効果】以上、作用の結果、本第１発明、及び、
第２発明のいずれにおいても、雪層表面温度の変化によ
る雪層表面の性状変化、及び、雪層から空気中への水分
昇華による雪層表面の性状変化の両方を防止して、大気
状態の変化を始めとする種々の空気低湿化要因や雪層温
度変化要因にかかわらず、スキー目的において所望の滑
走性を維持するなど雪層表面を安定して所望の性状に維
持し得るに至った。As described above, as a result of the operation, the first invention, and
In any of the second aspect of the invention, both the property change of the snow layer surface due to the change of the snow layer surface temperature and the property change of the snow layer surface due to the moisture sublimation from the snow layer to the air are prevented, and the atmospheric condition is maintained. It has become possible to stably maintain the desired properties of the snow layer, such as maintaining desired gliding properties for skiing purposes, regardless of various factors such as changes in air dehumidification and changes in the snow layer temperature.

【００１２】[0012]

【実施例】次に実施例を説明する。EXAMPLES Next, examples will be described.

【００１３】図１及び図２は屋内人工雪スキー場の設備
構成を示し、１は建屋、２は断熱手段を施した傾斜床で
あり、傾斜床２の床面上は第１ゲレンデ部２ａと第２ゲ
レンデ部２ｂとに区画し、それらゲレンデ部２ａ，２ｂ
に対し各別の系統の冷却配管３ａ，３ｂを敷設してあ
る。1 and 2 show the equipment structure of an indoor artificial snow ski resort, 1 is a building, 2 is an inclined floor provided with heat insulating means, and the floor surface of the inclined floor 2 is a first slope 2a. The second slope portion 2b is divided into these slope portions 2a and 2b.
On the other hand, cooling pipes 3a and 3b of different systems are laid.

【００１４】４ａは第１ゲレンデ部２ａの冷却配管３ａ
に循環させる冷媒を冷却する第１低温冷凍機、４ｂは第
２ゲレンデ部２ｂの冷却配管３ｂに循環させる冷媒を冷
却する第２低温冷凍機である。Reference numeral 4a is a cooling pipe 3a of the first slope portion 2a.
The first low temperature refrigerator 4b for cooling the refrigerant to be circulated to the second cryocooler 4b is a second low temperature refrigerator for cooling the refrigerant to be circulated through the cooling pipe 3b of the second slope 2b.

【００１５】また、５は屋内を温湿度調整する空調設備
であり、減湿手段５ａ、温調手段５ｂ、加湿手段５ｃを
備え、屋内からの還気Ａｒと屋外からの取り入れ外気Ａ
ｏとの混合空気を空調設備５により温湿度調整し、この
温湿度調整空気Ａｓをファン６により屋内に送給する。Numeral 5 is an air-conditioning facility for adjusting the temperature and humidity inside the room, which is provided with a dehumidifying means 5a, a temperature adjusting means 5b, and a humidifying means 5c, and has return air Ar from the inside and intake air A from the outside.
The temperature and humidity of the air mixed with o is adjusted by the air conditioning equipment 5, and this temperature and humidity adjusted air As is sent indoors by the fan 6.

【００１６】７は屋内の温度ｔｒ及び相対湿度ｒを検出
する検出器、８ａ，８ｂは各冷却配管３ａ，３ｂの冷却
温度ｔｐａ，ｔｐｂを検出する検出器であり、９はこれ
ら検出器７，８ａ，８ｂの検出情報に基づいて各低温冷
凍機４ａ，４ｂ及び空調設備５を運転制御する制御装置
である。Reference numeral 7 is a detector for detecting the indoor temperature tr and relative humidity r, 8a and 8b are detectors for detecting the cooling temperatures tpa and tpb of the respective cooling pipes 3a and 3b, and 9 is these detectors 7, It is a control device that controls the operation of each low-temperature refrigerator 4a, 4b and the air conditioning equipment 5 based on the detection information of 8a, 8b.

【００１７】雪層Ｓの造成については、水を含浸させて
ゲル状とした水膨潤性ポリマを傾斜床２の上の両ゲレン
デ部２ａ，２ｂに敷き詰めて含水ポリマ層を形成し、空
調設備５により屋内を低温雰囲気に維持した状態で、各
低温冷凍機４ａ，４ｂを運転して各冷却配管３ａ，３ｂ
により含水ポリマ層を冷却することで含水ポリマ層を凍
結させ、この凍結ポリマ層を雪層Ｓとする。Regarding the formation of the snow layer S, water-impregnated gel-like water-swellable polymer is spread over both slopes 2a and 2b on the inclined floor 2 to form a water-containing polymer layer, and the air conditioning equipment 5 The low temperature refrigerators 4a and 4b are operated to maintain the indoors in a low temperature atmosphere by the cooling pipes 3a and 3b.
The water-containing polymer layer is frozen by cooling the water-containing polymer layer, and the frozen polymer layer is referred to as a snow layer S.

【００１８】また、含水ポリマ層を凍結させた雪層Ｓの
表層部Ｓａを切削装置により細かく切削破砕することで
天然に近い雪面を形成する。Further, the surface layer Sa of the snow layer S in which the water-containing polymer layer is frozen is finely cut and crushed by a cutting device to form a snow surface close to natural.

【００１９】一方、スキー場としての使用において、制
御装置９は、屋内温度ｔｒが設定値ｔｒｒとなるよう
に、検出器７による検出屋内温度ｔｒと設定値ｔｒｒと
の偏差Δｔｒに基づき空調設備５における温調手段５ｂ
の温調出力を調整する。On the other hand, when used as a ski resort, the control device 9 controls the air conditioner 5 based on the deviation Δtr between the indoor temperature tr detected by the detector 7 and the set value trr so that the indoor temperature tr becomes the set value trr. Temperature control means 5b in
Adjust the temperature control output of.

【００２０】なお、屋内温度ｔｒの設定値ｔｒｒには、
屋内者にサーマルショックや不快感を与えない範囲で、
雪層Ｓの融解抑制に適した低温値を採用する。The set value trr of the indoor temperature tr is
To the extent that it does not cause thermal shock or discomfort to indoor people,
A low temperature value suitable for suppressing melting of the snow layer S is adopted.

【００２１】この屋内温度調整に並行して、制御装置９
は検出器７による検出屋内温度ｔｒと、第１及び第２ゲ
レンデ部２ａ，２ｂの夫々についての雪層表面温度ｔｓ
ａ，ｔｓｂの設定値ｔｓｓａ，ｔｓｓｂとに基づき、各
ゲレンデ部２ａ，２ｂにおける雪層表面温度ｔｓａ，ｔ
ｓｂが夫々の設定値ｔｓｓａ，ｔｓｓｂとなるような各
冷却配管３ａ，３ｂの冷却温度ｔｐｐａ，ｔｐｐｂを次
式により算出し、In parallel with this indoor temperature adjustment, the control device 9
Is the indoor temperature tr detected by the detector 7 and the snow layer surface temperature ts for each of the first and second slope portions 2a, 2b.
Based on the set values tssa and tssb of a and tsb, the snow layer surface temperature tsa and t in each of the slope portions 2a and 2b.
The cooling temperatures tppa and tppb of the respective cooling pipes 3a and 3b such that sb becomes the respective set values tssa and tssb are calculated by the following equations,

【００２２】 ｔｂｂａ＝ｔｓｓａ＋α・ｄ・（ｔｓｓａ−ｔｒ）／λ ｔｂｂｂ＝ｔｓｓｂ＋α・ｄ・（ｔｓｓｂ−ｔｒ）／λ 但し α；空気と雪層との熱伝達率 ｄ；雪層の厚さ λ；雪層の熱伝導率Tbba = tssa + α · d · (tssa-tr) / λ tbbb = tssb + α · d · (tssb-tr) / λ where α: heat transfer coefficient between air and snow layer d; thickness of snow layer λ; Thermal conductivity of snow layer

【００２３】この算出冷却温度ｔｐｐａ，ｔｐｐｂを目
標冷却温度として、各冷却配管３ａ，３ｂの冷却温度ｔ
ｐａ，ｔｐｂが夫々の目標冷却温度ｔｐｐａ，ｔｐｐｂ
となるように、検出器８ａ，８ｂによる検出冷却温度ｔ
ｐａ，ｔｐｂと夫々の目標冷却温度ｔｐｐａ，ｔｐｐｂ
との偏差Δｔｐａ（＝ｔｐｐａ−ｔｐａ），Δｔｐｂ
（＝ｔｐｐｂ−ｔｐｂ）に基づき各低温冷凍機４ａ，４
ｂの冷却出力を調整する。The calculated cooling temperatures tppa and tppb are used as target cooling temperatures, and the cooling temperatures t of the cooling pipes 3a and 3b are set.
pa and tpb are the target cooling temperatures tppa and tppb, respectively.
So that the cooling temperature t detected by the detectors 8a and 8b is
pa and tpb and their respective target cooling temperatures tppa and tppb
Deviation Δtpa (= tppa-tpa), Δtpb
Based on (= tppb-tpb), the low temperature refrigerators 4a, 4
Adjust the cooling output of b.

【００２４】第１及び第２ゲレンデ部２ａ，２ｂの夫々
における雪層表面温度ｔｓａ，ｔｓｂの設定値ｔｓｓ
ａ，ｔｓｓｂは設定手段９ａ，９ｂに対する設定操作を
もって個別に変更できるようにしてあり、一般に雪層表
面温度ｔｓａ，ｔｓｂが低くなるほど雪層表面の動摩擦
係数が高くなる傾向があって雪層表面温度ｔｓａ，ｔｓ
ｂによりスキー滑走性が変化するのに対し、第１及び第
２ゲレンデ部２ａ，２ｂの夫々において雪層表面温度ｔ
ｓａ，ｔｓｂの設定値ｔｓｓａ，ｔｓｓｂを個別に変更
することで、第１及び第２ゲレンデ部２ａ，２ｂの夫々
におけるスキー滑走性を個別に調整できるように、ま
た、第１ゲレンデ部２ａと第２ゲレンデ部２ｂとでスキ
ー滑走性を相違させてスキーヤーが好みのゲレンデを選
択できるようにしてある。Set values tss of the snow layer surface temperatures tsa and tsb in the first and second slope portions 2a and 2b, respectively.
a and tssb can be individually changed by setting the setting means 9a and 9b. Generally, the lower the snow layer surface temperatures tsa and tsb, the higher the dynamic friction coefficient of the snow layer surface, and the snow layer surface temperature. tsa, ts
While the ski gliding property is changed by b, the snow layer surface temperature t is changed in each of the first and second slope portions 2a, 2b.
By individually changing the set values tssa and tssb of sa and tsb, the ski gliding characteristics of the first and second slope portions 2a and 2b can be individually adjusted, and the first slope portion 2a and the first slope portion 2a can be adjusted individually. The ski run is different from that of the two-piste section 2b so that the skier can select a desired ski.

【００２５】また、制御装置９は、検出器７により検出
される屋内の温度ｔｒと相対湿度ｒに基づき屋内空気Ａ
ｒの露点温度ｔｄを算出し，そして、各ゲレンデ部２
ａ，２ｂにおける雪層表面温度ｔｓａ，ｔｓｂの設定値
ｔｓｓａ，ｔｓｓｂのうち高温のものよりも所定温度Δ
ｔ（例えばΔｔ＝１℃ｄｅｇ）だけ高い値を目標露点温
度ｔｄｄ（ｔｓｓａ≧ｔｓｓｂの場合はｔｄｄ＝ｔｓｓ
ａ＋Δｔ，ｔｓｓａ＜ｔｓｓｂの場合はｔｄｄ＝ｔｓｓ
ｂ＋Δｔ）として、上記の算出結果に基づき、屋内空気
Ａｒの露点温度ｔｄを目標露点温度ｔｄｄに調整・維持
するように、空調設備５における減湿手段５ａ及び加湿
手段５ｃを制御する。Further, the control device 9 controls the indoor air A based on the indoor temperature tr and the relative humidity r detected by the detector 7.
The dew point temperature td of r is calculated, and each slope part 2
of the set values tssa and tssb of the snow layer surface temperatures tsa and tsb in a and 2b, the predetermined temperature .DELTA.
A value higher by t (for example, Δt = 1 ° C. deg) is set to a target dew point temperature tdd (tdd = tssb in the case of tssa ≧ tssb).
If a + Δt and tssa <tssb, then tdd = tss
b + Δt), the dehumidifying means 5a and the humidifying means 5c in the air conditioning equipment 5 are controlled so that the dew point temperature td of the indoor air Ar is adjusted and maintained at the target dew point temperature tdd based on the above calculation result.

【００２６】つまり、湿度非調整下において屋内空気Ａ
ｒの露点温度ｔｄが上記の目標露点温度ｔｄｄ未満とな
るような状況では、加湿手段５ｃによる屋内加湿で屋内
空気Ａｒの露点温度ｔｄを目標露点温度ｔｄｄにまで高
めて、屋内空気Ａｒの露点温度ｔｄが各ゲレンデ部２
ａ，２ｂのうちの高温側の雪層表面温度よりも所定温度
Δｔだけ高い値となるようにすることで、両ゲレンデ部
２ａ，２ｂにおける雪層Ｓから空気中への水分昇華を防
止し、これにより、水分昇華で雪層表面の性状が変化し
て滑走性が変化してしまうことを防止する。That is, the indoor air A without humidity adjustment
In a situation where the dew point temperature td of r is lower than the target dew point temperature tdd, the dew point temperature td of the indoor air Ar is raised to the target dew point temperature tdd by the indoor humidification by the humidifying means 5c, and the dew point temperature of the indoor air Ar is increased. td is each slope section 2
By making the temperature higher than the snow layer surface temperature on the high temperature side of a and 2b by a predetermined temperature Δt, it is possible to prevent water sublimation from the snow layer S to the air in both slope portions 2a and 2b, This prevents the property of the surface of the snow layer from changing due to the sublimation of water and the gliding property from changing.

【００２７】また、湿度非調整下において屋内空気Ａｒ
の露点温度ｔｄが上記の目標露点温度ｔｄｄより高くな
るような状況では、減湿手段５ａによる屋内減湿で屋内
空気Ａｒの露点温度ｔｄを目標露点温度ｔｄｄにまで低
下させて、屋内空気Ａｒの露点温度ｔｄが各ゲレンデ部
２ａ，２ｂのうちの高温側の雪層表面温度よりも所定温
度Δｔだけ高い値となるようにすることで、両ゲレンデ
部２ａ，２ｂにおける空気中から雪層Ｓ上への過度の水
分凝結・着霜を防止し、これにより、そのような過度の
水分凝結・着霜で雪層表面の性状が変化して滑走性が変
化してしまうことを防止する。In addition, indoor air Ar without humidity adjustment
In a situation in which the dew point temperature td of the indoor air Ar is higher than the target dew point temperature tdd, the dew point temperature td of the indoor air Ar is decreased to the target dew point temperature tdd by the indoor dehumidification by the dehumidifying means 5a, and By setting the dew point temperature td to be a value higher than the surface temperature of the snow layer on the high temperature side of each of the slope portions 2a and 2b by a predetermined temperature Δt, the dew point temperature td from the air in the slope portions 2a and 2b is higher than the snow layer S. It prevents excessive moisture condensation and frost formation on the snow layer, and thereby prevents the snow layer surface properties from changing due to the excessive moisture condensation and frost formation.

【００２８】なお、水分昇華を防止しきれず雪層Ｓが乾
燥状態となった場合には、屋内天井部に配設したスプリ
ンクラー装置１０等の適宜散水手段により雪層Ｓ上へ散
水して雪層Ｓに水分補充することで、雪質を回復して滑
走性を維持する。If the sublimation of water cannot be prevented and the snow layer S is in a dry state, it is sprinkled onto the snow layer S by an appropriate water sprinkling device such as the sprinkler device 10 installed on the indoor ceiling. By replenishing S with water, snow quality is restored and gliding performance is maintained.

【００２９】〔別実施例〕次に別実施例を列記する。[Other Embodiments] Next, other embodiments will be listed.

【００３０】雪層上空気Ａｒを加湿するに、前述の実施
例の如く屋内への供給空気Ａｓを加湿する形式に代え
て、屋内への直接の水噴霧により雪層上空気Ａｒを加湿
する形式を採用してもよく、加湿方式は種々の方式を適
用できる。In order to humidify the air Ar on the snow layer, instead of the method of humidifying the supply air As to the room as in the above-described embodiment, a method of humidifying the air Ar on the snow layer by directly spraying water indoors. May be adopted, and various humidification methods can be applied.

【００３１】本発明の実施において、加湿により雪層上
空気Ａｒの露点温度ｔｄを高めて雪層Ｓから空気中への
水分昇華を防止するに、雪層上空気Ａｒの露点温度ｔｄ
を雪層Ｓの表面温度ｔｓａ，ｔｓｂ以上に調整するのが
好ましいが、場合によっては、雪層Ｓの表面温度ｔｓ
ａ，ｔｓｂにまで至らずとも、加湿より雪層上空気Ａｒ
の露点温度ｔｄを湿度非調整状態に比べて高めるだけで
もよい。In the practice of the present invention, the dew point temperature td of the snow layer air Ar is increased in order to increase the dew point temperature td of the snow layer air Ar by humidification to prevent moisture sublimation from the snow layer S into the air.
Is preferably adjusted to be equal to or higher than the surface temperatures tsa and tsb of the snow layer S, but in some cases, the surface temperature ts of the snow layer S is
Even if the temperature does not reach a or tsb, the air above the snow layer will become more Ar than humidified.
The dew point temperature td may be increased as compared with the humidity non-adjusted state.

【００３２】雪層Ｓは、含水させた水膨潤性ポリマを凍
結させた人工雪層に限定されるものではなく、水を氷点
下雰囲気中へ噴霧して凍結させて、その凍結氷粒子を積
層させた雪層、あるいは、氷塊や氷層を切削して形成し
た氷粒子を積層させた雪層等々、どのような形態で形成
した雪層であってもよい。The snow layer S is not limited to an artificial snow layer in which a water-swellable polymer containing water is frozen, and water is sprayed into a sub-freezing atmosphere to freeze and the frozen ice particles are laminated. It may be a snow layer formed in any form, such as a snow layer, or a layer of ice particles formed by cutting ice blocks or ice layers.

【００３３】尚、特許請求の範囲の項に図面との対照を
便利にするため符号を記すが、該記入により本発明は添
付図面の構成に限定されるものではない。It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

【図面の簡単な説明】[Brief description of drawings]

【図１】屋内人工雪スキー場の設備構成を示す側面視断
面図FIG. 1 is a cross-sectional side view showing the equipment structure of an indoor artificial snow ski resort.

【図２】屋内人工雪スキー場の設備構成を示す平面図FIG. 2 is a plan view showing the equipment structure of an indoor artificial snow ski resort.

【符号の説明】[Explanation of symbols]

３ａ 雪層冷却手段 ３ｂ 雪層冷却手段 ５ａ 加湿手段 １０ 散水手段 Ａｒ 空気 Ｓ 雪層 ｔｓａ 表面温度 ｔｓｓａ 目標温度 ｔｓｂ 表面温度 ｔｓｓｂ 目標温度 3a Snow layer cooling means 3b Snow layer cooling means 5a Humidification means 10 Sprinkling means Ar Air S Snow layer tsa Surface temperature tssa Target temperature tsb Surface temperature tssb Target temperature

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 加湿手段（５ａ）により雪層上空気（Ａ
ｒ）を加湿して雪層（Ｓ）から空気中への水分昇華を防
止し、この水分昇華防止状態で、雪層冷却手段（３ａ),
（３ｂ）の出力を調整して前記雪層（Ｓ）の表面温度
（ｔｓａ),（ｔｓｂ）を目標温度（ｔｓｓａ),（ｔｓｓ
ｂ）に調整する雪層維持方法。1. The air above the snow layer (A) is humidified by a humidifying means (5a).
r) is humidified to prevent moisture sublimation from the snow layer (S) into the air, and in this moisture sublimation prevention state, the snow layer cooling means (3a),
By adjusting the output of (3b), the surface temperatures (tsa) and (tsb) of the snow layer (S) are changed to target temperatures (tssa) and (tss).
Snow layer maintenance method to adjust to b). 【請求項２】 雪層冷却手段（３ａ),（３ｂ）の出力を
調整して雪層（Ｓ）の表面温度（ｔｓａ),（ｔｓｂ）を
目標温度（ｔｓｓａ),（ｔｓｓｂ）に調整し、この調整
下において、前記雪層（Ｓ）から空気中への水分昇華に
対し、前記雪層（Ｓ）へ散水して前記雪層（Ｓ）に水分
補充する雪層維持方法。2. The surface temperature (tsa), (tsb) of the snow layer (S) is adjusted to the target temperature (tssa), (tssb) by adjusting the outputs of the snow layer cooling means (3a), (3b). Under this adjustment, a snow layer maintaining method of sprinkling water to the snow layer (S) and replenishing the snow layer (S) with water in response to sublimation of water from the snow layer (S) into the air.