JPH07286447A - Artificial snow facilities - Google Patents

Abstract

PURPOSE:To prevent the breakage of a snow layer cooling piping based on the scraping of a snow layer by a sliding tool or snow surface maintenance equipment by burying a net material under the surface of the snow layer apart upward from the snow layer cooling piping. CONSTITUTION:A laminated layer 19 of sand or sand-like material is formed on a floor 2 having snow layer cooling pipings 5 juxtaposed on the floor surface in the state where the snow layer cooling pipings 5 are buried therein. The laminated layer 19 is then impregnated with water, and the impregnated water is cooled and frozen to form a snow layer 4 on the laminated layer 19. In such artificial snow facilities, a net body 20 is laid in a position separated upward from the snow layer cooling pipings 5 in the state where it is buried under the snow surface of the snow layer 4. Thus, the snow layer cooling pipings 5 can be effectively protected by the high strength of the laminated layer 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for protecting a snow layer cooling pipe arranged on a floor surface forming a snow layer.

[0002]

2. Description of the Related Art Conventionally, a snow layer cooling pipe is arranged on a floor surface forming a snow layer, and the snow layer formed on the floor surface is maintained by cooling by a snow layer cooling pipe. In snow ski areas, etc., a snow layer is directly formed on the floor with the snow layer cooling pipe embedded in the snow layer, and an ice layer is provided in the ice layer with a snow layer cooling pipe. It was formed on the floor surface in a buried state, and a snow layer was formed on this ice layer.

[0003]

However, the snow layer is scraped off by a skiing equipment such as skis or a snow surface maintenance device, and even if the ice layer is provided, the ice layer is scraped off after the snow layer. Finally, there was a risk that the snow layer cooling pipe was exposed and damaged.

When the snow layer cooling pipe is damaged, the cooling medium in the pipe leaks out, which requires a great deal of labor and cost for restoration, and the snow layer of skis cannot be used during restoration work. Will lead to a situation such as.

In particular, when a white resin pipe is used for the snow layer cooling pipe, it is difficult to visually distinguish the snow layer or the ice layer from the snow layer cooling pipe, and the pipe strength against cutting is higher than that of the steel pipe. Since it is low, the above risks are particularly high.

An object of the present invention is to effectively protect the snow layer cooling pipe by a rational method.

[0007]

The first characteristic constitution of the method for protecting a snow layer cooling pipe according to the present invention is that the snow layer cooling pipe is arranged on the floor surface forming the snow layer. A layer of sand or a sand-like material is formed on the floor surface with the snow layer cooling pipe embedded in the layer, the layer is impregnated with water, and the impregnated water is frozen by cooling. The formation of the snow layer on the layer of the laminated layer in which the impregnated water is frozen has the following actions and effects.

[0008]

That is, in the above-mentioned first characteristic configuration, when the sand or sand-like material is impregnated with water and the impregnated water is frozen, the impregnated water frozen in the voids between the sand particles or sand-like particles is Since it is a solidified layer, and the densely packed sand or sand-like material is an aggregate, it is denser than a snow layer or simply by freezing water. It has much higher strength than the ice layer without aggregates.

Therefore, by placing the snow layer cooling pipe in the buried state in the layer of the sand or the sand-like material in which the impregnated water is frozen, and forming the snow layer on the layer of this layer, the snow layer is formed. Even if it is scraped off by a skiing equipment such as a ski or a snow surface maintenance device, the pipe for cooling the snow layer can be effectively protected with the high strength of the laminated layer.

[0010]

As a result, according to the first characteristic configuration of the present invention, a snow layer cooling pipe is damaged due to skid of a snow layer by a skiing equipment such as skis or a snow surface maintenance device.
Compared with the conventional method, it can be avoided more surely that a lot of labor and expense are required for the restoration, and that the snow layer such as skis cannot be used during the restoration work, and by extension, the floor surface forming the snow layer. It has become possible to greatly improve the manageability and reliability of the snow layer facility where the piping for cooling the snow layer is installed in the area.

[Second and Third Characteristic Configurations of the Present Invention] A second characteristic configuration of the snow layer cooling pipe protecting method according to the present invention is as follows.
A marker of a color other than white is laid in a buried state at the boundary between the stack and the snow layer.

A third characteristic configuration of the method for protecting a snow layer cooling pipe according to the present invention is that at least the layer surface of the laminate is colored other than white.

That is, according to the second characteristic structure or the third characteristic structure, the fact that the scraping of the snow layer has reached the boundary between the stack and the snow layer means that the second characteristic structure is not white. It is possible to easily and surely discriminate by the exposure of the color marker and the exposure of the laminated surface of colors other than white in the third characteristic configuration, and appropriate measures can be taken before the damage due to the scraping of the protective layer itself. The cooling pipe can be more reliably prevented from being damaged.

[0014]

EXAMPLES Next, examples will be described.

FIG. 1 shows an indoor artificial snow skiing area, 1 is a building, 2 is a floor provided with an inclined portion for forming a slope, and a snow layer 4 formed on the floor is formed on the floor. The snow layer cooling pipes 5 for cooling the are arranged in parallel.

Reference numeral 6 is an air conditioner for cooling the indoor air A,
A refrigerating machine 7 circulates and supplies a low-temperature refrigerant to each of the snow layer cooling pipe 5 and the air cooling coil 6a in the air conditioner 6.

Reference numeral 8 denotes a ventilation facility, which discards a part of the indoor air A sucked from the suction passage 9 to the outside through the exhaust passage 10,
Further, a mixed air of the remaining portion of the indoor air A sucked from the suction passage 9 and the amount of the outside air taken in from the outside air introduction passage 11 is supplied indoors through the ventilation passage 13 provided with the dehumidification device 12. It is configured to do so.

Reference numeral 14 denotes a total heat exchanger that collects the cold heat of the exhaust gas to be discarded outdoors and precools the outside air taken in by the recovered cold heat.

Further, 15 is compressed by a compressor 16,
Further, it is a spray nozzle for producing artificial snow, which sprays indoors the water cooled by the cooler 18 together with the air cooled by the cooler 17.

When forming the snow layer 4 on the floor,
First, prior to the creation of the snow layer 4 itself, sand is sprinkled on the floor surface to form a sand stack 19 on the floor surface, and the snow layer cooling pipe 5 is embedded in the sand stack 19 (for example, Sand stack 1
The surface of 9 is 3 mm further from the upper end of the pipe 5 for cooling the snow layer
It is a state in which it is located at a high position by about 10 mm).

Then, a low-temperature refrigerant is circulated and supplied to the snow layer cooling pipe 5 to make the snow layer cooling pipe 5 have a cooling function, and in this state, water is sprayed on the sand layer 19 to disperse the spray water.
Is impregnated with the water and the impregnated water is frozen by cooling with the snow layer cooling pipe 5.

On the surface of the sand stack 19 in which the impregnated water is frozen, a wire mesh marker 20 colored other than white is laid.

When the impregnation of the impregnated water in the sand stack 19 is completed (or in parallel with the step of freezing the impregnated water in the sand stack 19), the low-temperature refrigerant is circulated and supplied to the air cooling coil 6a of the air conditioner 6. Run 6 to cool the interior below freezing.

After that, cold water is sprayed from the artificial snow generating nozzle 15 together with the compressed cooling air into a sub-freezing room, and the spray water is frozen into fine ice particles by the adiabatic expansion change accompanying this spraying and the cooling in the sub-freezing atmosphere. Using this as artificial snow, a marker 20 made of wire mesh is embedded on the layer of the sand stack 19 in which the impregnated water is frozen to a predetermined thickness (for example, 140 mm).
The snow layer 4 is formed by stacking the layers.

In other words, the snow layer 4 is used for skiing or the like after the above-mentioned snow layer is formed. In the use of the snow layer, the snow layer 4 is formed by a ski or other snow surface runner or a snow surface maintenance device. Is scraped off and this scraped off is sand laminated 1
It is possible to easily determine that the situation where the snow has progressed to the surface of No. 9 and artificial snow needs to be replenished by the exposure of the marker 20 of a color other than white.

Further, by arranging the snow layer cooling pipe 5 in the sand layer 19 in which the impregnated water is frozen, the snow layer cooling pipe 5 is embedded so that the snow layer is cooled by scraping with a snow surface sliding tool such as a ski or a snow surface maintenance device. It is designed to prevent the pipe 5 for use from being exposed and being damaged by the indication of the progress of scraping by the marker 20 and the pipe protecting function by the high strength of the impregnated water frozen sand laminate 19.

When the snow layer is used after the formation of the snow layer, the low temperature refrigerant is continuously supplied to the snow layer cooling pipe 5 to prevent the snow layer 4 from melting due to the cooling function of the snow layer cooling pipe 5. On the other hand, the indoor air cooling by the air conditioner 6 is lowered or stopped to release the indoor maintenance of the sub-zero temperature,
Prevent skiers and other snow users from feeling the extreme cold.

In the operation of the ventilation equipment 8, the dehumidifying output of the dehumidifying device 12 is adjusted to adjust the indoor air humidity so that the dew point temperature of the indoor air A becomes substantially equal to the surface temperature of the snow layer 4, and thereby the skier. In addition to preventing moisture replenished in the indoor air A from condensing on the surface of the snow layer due to breathing of the snow layer user or intake of the outside air, conversely, water is dissipated from the snow layer 4 into the indoor air A. Also, the snow layer 4 is stably maintained in a good quality suitable for gliding.

The artificial snow is replenished for scraping off the snow layer 4 and the like by the operation of the air conditioner 6 during the snow layer use stop time, such as at night, when the interior of the indoor snow is again in a freezing-free atmosphere and the artificial snow generating nozzle 15 is used. Artificial snow is generated by the above, or artificial snow manufactured separately is transported.

[Other Embodiments] Next, other embodiments will be listed.

The pipe protection layer 19 formed on the floor with the snow layer cooling pipe 5 buried therein and impregnated with water to freeze the impregnated water is not limited to the layering of sand. However, as the laminated material, various sand-like materials such as granular plastic materials and granular ceramic materials other than sand, that is,
Various granular solid materials other than frozen substances can be applied.

The snow layer 4 can be formed by spraying cold water with compressed air into a sub-freezing atmosphere as in the above-mentioned embodiment, or by adding an ice layer or a sand layer on the sand or sand-like substance in which the impregnated water is frozen. A method of forming a frozen layer of a water-containing polymer material and cutting and crushing the ice layer or the frozen layer of a water-containing polymer material to form an artificial snow layer, or humidifying water or fine water mist given in the air to the sand or Various methods can be adopted, such as a method in which frost is formed on a layer of sand-like material and the frost layer is used as an artificial snow layer.

Various materials such as steel pipes and resin pipes can be applied to the snow layer cooling pipe 5, and the cooling medium to be circulated in the pipe is cold water or brine, or the snow layer cooling pipe 5
A variety of refrigerants such as CFCs that are vaporized in the state of being used as an evaporator can be used.

When a marker 20 of a color other than white is laid in the boundary between the laminated layer 19 of sand or sand-like material and the snow layer 4 in a buried state, the marker 20 is not limited to a mesh body such as a wire mesh. Also, various materials such as a sheet-shaped body and a tape-shaped body can be applied.

By making at least the surface of the laminated layer 19 of sand or sand-like material a color other than white, it is possible to easily visually confirm that the snow layer 4 has been scraped off to the surface of the laminated layer 19 of sand or sand-like object. You may allow it.

It is also possible to omit the installation of the marker 20 and the coloring of the laminate 19 of the article or sand-like material to a color other than white.

The present invention can be applied when the snow layer 4 is formed for purposes other than skiing.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a block diagram of an indoor artificial snow ski resort showing an embodiment of the present invention

[Explanation of symbols]

 4 Snow Layer 5 Snow Layer Cooling Pipe 19 Sand or Sand-like Laminate 20 Marker

Claims (1)

[Claims] 1. An artificial snow facility in which a snow layer (4) is formed on a floor (2) in which pipes (5) for cooling a snow layer are juxtaposed on the floor surface. The snow layer (4) is located at a position spaced apart upward from the snow layer cooling pipe (5) over its entire surface.
An artificial snow facility that is laid under the snow surface.