JPH04306370A - Artificial skiing ground and construction method thereof - Google Patents

Abstract

PURPOSE:To obtain an artificial skiing ground safe in falling down by piping a cooling pipe on a construction member constructed on the foundation having a slope to form an ice layer around it, and laminating a snow layer on the surface thereof. CONSTITUTION:A construction member 1 consisting of synthetic resin, rubber, asbestos, etc., is constructed on the surface 7' of the foundation 7 of ground, concrete, asphalt, etc., having a slope 6. After that, a cooling pipe 2 is piped along the surface 7' of the foundation on the construction member 1, blocks of ice are spread around it, refrigerand is injected into the cooling pipe 2, and blocks of ice and water are colored to form an ice layer 3. A snow layer 5 is laminated on the surface of the ice layer 3 to manufacture an artificial skiing ground A. The slope is formed to the inside of a tent, an air supply means is used to lower the temperature inside the tent, and it can be so constituted that the temperature is kept in uniform.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial ski resort manufactured outdoors or indoors, and a method for manufacturing the same.

0002

2. Description of the Related Art Conventional artificial ski resorts include those in which artificial snow is piled directly on the ground surface having a slope.

0003

[Problems to be Solved by the Invention] However, in conventional artificial ski resorts, snow tends to melt as the temperature changes, and in areas where the ground surface is exposed due to melting snow or skiers falling, The problem is that it is dangerous for skiers.

[0004] Accordingly, the present invention provides a safe artificial ski resort where the snow layer does not melt even in tropical countries such as Okinawa, and where skiers are not injured even if they fall, and a method for manufacturing the same. It is an object.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the artificial ski resort of the present invention includes: a laying member laid on the surface of a foundation having a slope; and piping installed on the laying member along the foundation surface. an ice layer created by scattering ice blocks around the cooling pipe and cooling the ice blocks and water by passing a refrigerant through the cooling pipe; and a snow layer layered on the surface of the ice layer. be.

[0006] Furthermore, in order to similarly achieve the above object,
a laying member laid on the surface of a foundation having a slope; a cooling pipe piped along the foundation surface on the laying member; ice blocks scattered around the cooling pipe, and a refrigerant passed through the cooling pipe;
A slope is formed inside the tent, consisting of an ice layer created by cooling ice blocks and water; and a snow layer layered on the surface of the ice layer, and an air supply means is used to lower and evenly maintain the temperature inside the tent. It may also be an artificial ski resort that is maintained. especially,
In this case, a tent with a double structure consisting of an outer sheet and an inner sheet is used, and the inside of the ventilation section between the outer sheet and the inner sheet is forcedly ventilated from the bottom of the slope to the top using an air supply means, or the outside of the tent is exposed to sunlight. It is preferable to use a color that reflects light, and a color that blocks ultraviolet rays on the inner surface of the tent.

In order to achieve the above object, the method for manufacturing an artificial ski resort of the present invention includes: a step of laying a laying member on the surface of a foundation having a slope; and a step of laying a laying member on the surface of a foundation having a slope; The process of piping a cooling pipe; The process of piling ice blocks around the cooling pipe; Passing a refrigerant through the cooling pipe and spraying water while cooling the ice block below the freezing temperature to create an ice layer. It consists of a step of layering snow made by crushing ice or artificial snow.

Furthermore, due to the effects described below, it is preferable to support the cooling pipe in a hollow manner, and in addition, to provide a net-like snow retaining member on the surface of the ice layer or in the middle of the ice layer.

[0009]

[Function] As described above, according to the artificial ski resort and the manufacturing method thereof of the present invention, a laying member is laid on the surface of the foundation having a slope, and a large number of cooling pipes for passing refrigerant are arranged on the laying member. Then, ice blocks are scattered around this cooling pipe, a refrigerant is passed through the cooling pipe, and water is sprinkled while cooling the ice blocks below the freezing temperature to create an ice layer, for example, on the surface of the ice layer or on the ice layer. It can be manufactured by laying a snow retaining member in the middle of the ice and layering snow made by crushing ice or artificial snow.

[0010] If a slope with the above structure is formed inside the tent and an air supply means is used to lower and maintain the temperature inside the tent uniformly, the temperature will be increased from the lowest temperature point. By sending air using an air blowing means toward areas with high temperatures, it is possible to lower the temperature inside the tent and maintain it at a uniform temperature.

[0011] In addition, when using a tent with a double structure consisting of an outer sheet and an inner sheet, and using an air supply means to forcefully ventilate the inside of the ventilation section between the outer sheet and the inner sheet from the bottom to the top of the slope. By sending air from the bottom of the slope to the top, it is possible to lower the temperature inside the tent and maintain it at a uniform temperature, and in addition, it reflects sunlight on the outside of the tent. If you use color and use a color that blocks ultraviolet rays on the inner surface of the tent, you can prevent the temperature inside the tent from rising.

Furthermore, by supporting the cooling pipe in a hollow manner,
Efficient cooling can be performed by the refrigerant in the cooling pipe.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be explained by further illustrated embodiments.

Artificial ski resort A according to the first embodiment of the present invention
As shown in FIG. 1, it is composed of a laying member 1, a cooling pipe 2, an ice layer 3, a snow retaining member 4, and a snow layer 5.

As shown in FIG. 1, the laying member 1 is made of the ground, concrete, asphalt, etc., and is made of various materials such as synthetic resin, rubber, asbestos, etc., and is laid on the surface 7' of the foundation 7 having the slope 6. It is made of material. In particular, it is preferable to use a heat insulating member or a heat insulating sheet made of a material capable of insulating the foundation 7 as the laying member 1.

The cooling pipe 2 is a pipe that uses brine or the like to pass a refrigerant, and is directly or hollowly supported on the installation member 1.
Piping is provided along the foundation surface 7'. As shown in FIGS. 1 and 3, the illustrated cooling pipe 2 utilizes a plate-like support plate 9 provided with insertion holes 8 that open upward according to the installation intervals.
It is designed to be supported in the hollow. In addition, the cooling pipe 2 must be able to withstand the temperature of the refrigerant passing through it, and must also be able to withstand expansion and contraction due to the significant temperature difference between when the refrigerant is flowing and when it is not. Must-have. For example, soft pipes made of vinyl acetate or polyethylene are preferred; they have good cold resistance, can be used at -80°C, have good pressure resistance, and are resistant to chemicals, especially the calcium chloride solution used for brine. have. In addition, the size of the cooling pipe 2 has an inner diameter of 12 to 2
It is preferable to use a material with a diameter of 1 mm, and in order to increase the heat transfer area, a bellows-shaped material made of these materials may also be used.

The ice layer 3 is created by scattering ice blocks around the cooling pipe 2 as shown in FIG. 1, passing a refrigerant through the cooling pipe 2, and spraying water or mist while cooling the ice blocks below the freezing temperature. In addition, the example shown is ice layer 3.
to the foundation 7, piles 1 are installed to prevent the ice layer 3 from moving.
Entering 0. This ice layer 3 can completely block heat from flowing in and out between the foundation part 7 and the snow layer 5.

The snow retaining member 4 is installed on the surface of the ice layer 3 or in the middle of the ice layer 3, as shown in FIG. 1, to prevent the snow layer 5 from shifting. A synthetic resin sheet having a large frictional force or a mesh having a square shape of 20 to 30 mm may be used. Furthermore, there are cases where it is not necessary to provide the snow retaining member 4.

As shown in FIG. 1, the snow layer 5 is formed by layering snow made by crushing ice, artificial snow, or natural snow by transporting it using a snowmobile or the like, or by making it fall. It is something. In addition, the snow itself can be colored, and the ice layer 3
By coloring the surface or laying a colored sheet on the surface of the ice layer 3, it is possible to enjoy colored snow, and it is possible to provide an artificial ski resort A that is interesting in terms of planning.

Further, as a specific example of construction of the cooling pipe 2, the one shown in FIG. 2 can be mentioned. That is, the header pipe 11a is supported from above the slope 6 downwardly on the laid sheet 1 with support plates 9...
, 11b are spaced apart and arranged in parallel, and this header pipe 11,
11, header pipes 11' are similarly arranged at regular intervals, and these header pipes 11' are connected to a plurality of cooling pipes 2.
The refrigerant is sent in the direction of the arrow from a refrigerator (not particularly shown) connected to one header pipe 11a, and finally to a tank (not particularly shown) connected to the other header pipe 11b. (not shown). Therefore, the flow of the refrigerant in the cooling pipe 2 can be made to flow from the lower side of the slope 6 to the upper side. Further, it is also possible to cause the flow of the refrigerant in the cooling pipe 2 to pass from above the slope 6 to below.

Next, a slope B consisting of the above-mentioned laying member 1, cooling pipe 2, ice layer 3, snow retaining member 4, and snow layer 5 is formed inside the tent 12, and the air supply means 13 is used to blow the inside of the tent 12. A unit-type artificial ski resort A' that lowers and maintains the temperature uniformly, that is, an artificial ski resort A' of a second embodiment will be described with reference to FIGS. 4 and 5.

The artificial ski resort A' shown in FIGS. 4 and 5 has a double structure consisting of an outer sheet 14 and an inner sheet 15, and a tent 12 with an open front surface 16a and a rear surface 16b. Air supply means 13 using a fan or the like are provided near the front surface 16a and the rear surface 16b in the ventilation section 16 between the outer sheet 14 and the inner sheet 15, respectively.
The air supply means 13, 13 are used to perform forced ventilation from the lower part of the ski slope B to the upper part. Normally, the temperature inside the tent 12 is higher at the top of the slope B than at the bottom due to solar heat, but by performing forced ventilation in this way, the temperature inside the tent 12 is lowered and the temperature inside the tent 12 is also lowered. Can be kept uniform. Further, it is preferable that the outer surface of the tent 12 is colored to reflect sunlight, such as white or milky white (ivory), and the inner surface of the tent 12 is colored to block ultraviolet rays, such as light blue or orange. Reference numeral 18 shown in FIGS. 4 and 5 is a safety guide provided on both sides of Slope B to prevent skiers from falling off Slope B and injuring themselves. Although not shown, it is also possible to simply use a handrail. In this way, the entire artificial ski resort A' is manufactured as a unit,
If you use this artificial ski resort A', you can enjoy skiing even in tropical countries such as Okinawa.

[0023] As a method of lowering the temperature inside the tent 12 and keeping the temperature inside the tent 12 uniform, the method shown in FIG.
As shown in the artificial ski resort A' of the third embodiment, the tent 1
An opening 1 is formed in the inner sheet 15 located at the upper and lower parts of the ski slope B without opening the front surface 16a and the rear surface 16b of the slope B.
By drilling 7 and rotating the air supply means 13, 13, the wind moves inside the tent 12 from the upper part of the ski slope B to the lower part, and by moving the ventilation part 16, the wind moves in the direction of the arrow in FIG. It is also possible to adopt a device that performs forced ventilation so as to circulate, and in particular, instead of making the tent 12 a double structure, the air supply means 13 is provided at an appropriate location within the tent 12, and air is supplied from a low temperature area to a high temperature area. It is also possible to carry out forced ventilation by blowing air with the means 13. Furthermore, although only the upper part of the tent 12 in the illustrated example has a double structure, it is also possible to construct the entire tent 12 from the upper part to the sides to have a double structure.

Furthermore, a method for manufacturing an artificial ski resort according to a typical embodiment of the present invention will be explained based on FIG. 1. The method for manufacturing an artificial ski resort includes the steps of: laying a laying member 1 on the surface 7' of a foundation 7 having a slope 6; piping a large number of cooling pipes 2 on the laying member 1 for passing a coolant; A step of scattering ice blocks around the cooling pipe 2; a step of passing a refrigerant into the cooling pipe 2 and spraying water while cooling the ice block below the freezing temperature to create an ice layer 3; It consists of a step of laying a snow retaining member 4 on the surface or in the middle; and a step of layering snow made by crushing ice or artificial snow. Further, the detailed technical content is as described above.

[0025] As a method for repairing the artificial ski resort A, although not particularly shown, the surface of the snow layer 5, which has become ice burnt, is broken up by scraping it with an agitator attached to the rear of a traveling vehicle such as a snowmobile. 5 can be maintained.

As described above, according to the artificial ski resort A of the representative embodiment of the present invention and its manufacturing method, the laying member 1 having heat insulating properties completely blocks heat from flowing into and out of the foundation 7, and furthermore, ice By the refrigerant passing through the cooling pipe 2 of the layer 3,
The ice layer 3 is cooled to below the freezing temperature, completely blocking heat transfer between the snow layer 5 above the ice layer 3 and the foundation 7, and keeping the snow layer 5 cold, so the outside air temperature increases. Also snow layer 5
can never be solved. Further, as the skier skis repeatedly, the snow layer 5 peels off and the ice layer 3 is exposed, and even if the skier falls on this exposed surface, he will not be injured.

Furthermore, as shown in FIG. 2, refrigerant is fed in the direction of the arrow from a refrigerator (not particularly shown) connected to one header pipe 11a, and is finally connected to the other header pipe 11b. Since the refrigerant is sent to a tank (not particularly shown), the flow of the refrigerant in the cooling pipe 2 can be passed from the lower part of the slope 6 upwards, so that the entire snow layer 5 can be uniformly and efficiently cooled. It can be carried out. Furthermore,
Since the cooling pipe 2 is hollowly supported by the support plate 9 and ice blocks are scattered thereon, the entire ice layer 3 can be cooled uniformly and efficiently. In addition, since a net-like material is used as the snow retaining member 4, this resistance causes the ice layer 3 on the slope 6 to
The snow layer 5 stacked above does not slide down, and the temperature of the ice layer 3 can be directly transmitted to the snow layer 5.

Next, in order to implement the above-mentioned artificial ski resort A', it is necessary to use a structure that is the same as that of the second embodiment of the present invention shown in FIGS. 4 and 5, and is 1. /15
The results of an experiment conducted using the experimental equipment of the artificial ski resort A', which is of a similar size, will be explained in detail.

[Experiment example] (Summary of artificial ski resort A for experiment) As shown in Fig. 10, a foundation part having a slope 6 at an angle θ is created by using the slope of a mountain or hill inside the tent 12 or by assembling a frame. As shown in FIG. 6, the laying member 1 is laid on the surface of the foundation 7, and as shown in FIG. , 11b are connected to the U-shaped cooling pipes 2, and the cooling pipes 2 are assembled by being hollowly supported. A connecting pipe 19 is piped from the ends of the header pipes 11a and 11b, and is connected to a brine tank 20 installed inside the tent 12 and an air-cooled chiller unit 21 installed outside the tent 12. The ice layer 3 can be cooled by flowing brine, which is a refrigerant, in the direction of the arrow in FIG. 9 through the cooling pipes 2. In addition, 22 shown in FIG.
It is a generator.

(Conditions) Dimensions of slope B and tent 12 in FIG. 8: L
1 = 28,000mm, L2 = 6,000mm,
L3 = 20,000mm, L4 = 2,000mm
, L5 = 7,000mm, L6 = 1,000mm
, L7 = 5,000mm. Dimensions of slope B in Figure 9: L8 = 17,0
00mm, L9 = 5,000mm. Dimensions of slope B in Figure 10: L10 = 1,0
00mm, L11=17,000mm, L12=2,
000mm, L13=3,000mm, L14=3
,000mm, θ=11 degrees. Height of tent 12 in FIG. 5: L15=4,
500mm, L16=5,000mm, L17=7
,000mm. Dimensions of measurement points in Figure 6: L18=50
mm, L19=20mm, L20=100mm, L2
1=20mm, L22=30mm, L23=25mm,
L24=20mm, L25=1,000mm. Dimensions and installation position of cooling pipes 2: Use 10A polyvinyl chloride pipes or 10A bellows-like flexible hoses, and install them at 40 mm intervals. Capacity of air-cooled chiller unit 21: Cooling temperature 2
5℃ (Blower inlet temperature)
: Refrigerant brine temperature -11℃ (outlet temperature
)

: Cooling capacity 26,000kcal/hr

: Power supply AC200, 3Φ, 60Hz, 7
．． 5kw x 2 brine pump capacity
: Submersible centrifugal pump 50Φ×250l/mi
n×23mH,
AC200, 3Φ, 6
0Hz, 3.7kw
: Brine used
Ethylene glycol solution (ratio
Weight γ=1
．． 05kg/m3, specific heat C=0.83)

: Temperature difference Δt = 2℃
:Brine flow rate 250l/min
:Brine flow rate 0
．． 4m/s Dimensions of header pipes 11a and 11b
:80A

(Method) First, after operating the air-cooled chiller unit 21 shown in FIG.
The temperature was lowered to ~-13°C, a refrigerant using brine was supplied from the air-cooled chiller unit 21 to the header pipe 11a, and the refrigerant was further flowed in the direction of the arrow in FIG. 9 into the cooling pipes 2... to cool the ice layer 3. Brine tank 20 through header pipe 11b
It is circulated by returning it to Next, place 5 on the laying member 1.
Ice layer 3 is created by laying crushed ice to a thickness of 0 mm to 70 mm.
and sprinkle water on the surface of the crushed ice and the surface of the cooling pipe 2,
A net-like snow retaining member 4 is laid down, and a layer of 50 mm to 7
The snow layer 5 can be formed by spreading crushed ice to a thickness of 0 mm, sprinkling water on the surface of the crushed ice, and spreading the crushed ice all over. In this way, as shown in FIG.
, it is possible to form a slope B formed by laminating snow layers 5. Moreover, as shown in FIGS. 4 and 5, the temperature inside the tent 12 is lowered by forcibly ventilating air through the ventilation section 16 in the tent 12 from the lower part to the upper part of the slope B using the air supply means 13 using, for example, a fan. At the same time, the temperature can be maintained uniformly. In this way, the temperature at each point shown in FIG. 6 on slope B was measured, and the result is shown in FIG.
, which is the graph shown in FIG. 11 (the experiments were conducted on different days in FIG. 10 and FIG. 11).

(Results) ■ In order to prevent the surface of the snow layer 5 from melting, based on the temperature measured at each point on slope B shown in FIGS. 10 and 11 or the actual measurement data on site,
It has been found that it is necessary to maintain the temperature inside the tent 12 at 8°C or lower, the temperature of the brine as a refrigerant at -11°C or lower, and the temperature on the surface of the snow layer 5 at -1°C or lower. Therefore, as long as these temperatures can be maintained, it is possible to manufacture an artificial ski resort A even in a tropical country such as Okinawa. In addition, when comparing the cases where a 10A polyvinyl chloride pipe or a 10A bellows-shaped flexible hose is used, the heat transfer area is larger when a bellows-shaped flexible hose is used, as shown in Figs. 10 and 11. The temperature can be lowered throughout. ■
When the ratio of ice to air in the snow layer 5 in the initial state was calculated based on actual measurements, it was found to be 1:1. By using this value as a guideline, a high quality snow layer 5 can be maintained. ■ Calculation of the required amount of heat per unit on slope B Temperature inside tent 12: 8 ℃ Brine flow rate: 400 l/min
Brine temperature difference: 0.8℃ Brine specific gravity: 1.065 (at -10.5℃)
Specific heat: 0.8
4 Viscosity: 8c
p concentration: 35
%WC Total heat:
Q=400 ×0.80×0.84×1.065 ×6
0=17.176kcal/Hr Slope B
Required heat amount per unit: q = 17.176/
(5 x 20)

=172kcal/Hr. m2. ■Calculation of the required heat transfer area on slope B
As shown in FIG. 13, the dimensions of the ice layer 3 and snow layer 5 are
L26=100mm, L27=70mm, L28=3
When set to 0mm, thermal conductivity
:K=1/(1/10+0.07/1.9+0.0
3/0.96 +1/258)
=5.91 cal/
m2. Hr. ℃ Heat transfer area
:A=q/K(t1-t2)=172/(5.9
×(8-(-11.0))
= 1.53 m2. ■Checking the degree of adhesion of the ice layer 3 By scattering ice blocks up to the position of the cooling pipe 2 and spraying water at that point, the water penetrates between the ice blocks and the ice blocks stick together. Therefore, the ice layer 3 does not collapse. ■Checking the quality of the snow layer 5 Since the snow layer 5 is formed by scattering snow that has been crushed into small pieces,
Snow quality equivalent to or better than natural snow was obtained. When skiers actually skied Slope B, they found it to be in very good condition.

[0032]

[Effects of the Invention] Since the artificial ski resort and its manufacturing method of the present invention are configured as described above, the laying member blocks heat from entering and exiting the foundation, and furthermore, the refrigerant passes through the cooling pipe of the ice layer. As a result, the ice layer is cooled below the freezing temperature, completely blocking heat transfer between the snow layer on top of the ice layer and the foundation, and also keeping the snow layer cool, so even if the outside temperature rises, the snow will not melt. The layers never come apart. Further, as the skier skis repeatedly, the snow layer peels off and the ice layer is exposed, and even if the skier falls on this exposed surface, he or she will not be injured. If a ski slope with the above structure is formed inside the tent and an air supply means is used to lower and maintain the temperature inside the tent uniformly, it is possible to move from a low-temperature area to a high-temperature area. By blowing air toward the tent, it is possible to lower the temperature inside the tent and maintain it at a uniform temperature.By manufacturing and selling the entire artificial ski resort as a unit, it is possible to lower the temperature inside the tent and maintain it at a uniform temperature. You can even enjoy skiing. In addition, when using a tent with a double structure consisting of an outer sheet and an inner sheet, and using an air supply means to forcefully ventilate the ventilation section between the outer sheet and the inner sheet from the bottom of the slope to the top, By sending air into the tent using an air blower, it is possible to lower the temperature inside the tent and maintain it at a uniform temperature.In addition, by using a color that reflects sunlight on the outside of the tent, If you use a color that blocks ultraviolet rays, you can prevent the temperature inside the tent from rising. If a cooling tube with hollow support is used, the entire ice layer can be uniformly cooled because the cooling tube is supported in the hollow and ice blocks are scattered thereon. If a net-like snow retaining member is used on the surface of the ice layer or in the middle of the ice layer, the snow layer stacked on the ice layer or the ice layer on the slope will not slide down due to the resistance of the snow retaining member.

[Brief explanation of the drawing]

[Fig. 1] A vertical cross-sectional view of an artificial ski resort according to a first embodiment of the present invention.

[Fig. 2] A perspective view showing the piping state of the cooling pipe.

[Figure 3]
Similarly, a perspective view of the support plate.

[Fig. 4] A vertical cross-sectional view of an artificial ski resort according to a second embodiment of the present invention.

[Fig. 5] Cross-sectional view taken along the line A-A in Fig. 4

[Fig. 6] Vertical cross-sectional view of the slope in the artificial ski resort of the second embodiment

[Fig. 7] Vertical cross-sectional view of an artificial ski resort according to the third embodiment of the present invention.

[Fig. 8] Layout diagram of ski slopes at an artificial ski resort in the second embodiment

[Figure 9] Layout diagram of the cooling tube as well

[Figure 10] Vertical cross-sectional view of the ski slope

[Figure 11] Graph showing the temperature status of the ski slope

[Figure 12]
Graph showing the temperature status of the ski slope

[Figure 13] Vertical cross-sectional view of the ski slope showing the dimensional relationships necessary to determine the heat transfer area

[Explanation of symbols]

A. Artificial ski resort B Slope 1 Sheet 2 Cooling pipe 3 Ice layer 4 Snow preservation materials 5 Snow layer 6 Slope 7 Foundation part 8 Insertion hole 9 Support plate 10　Pile 11 Header pipe 12 Tent 13 Air supply means 14 External sheet 15 Internal sheet 16 Ventilation part 17 Opening 18 Safety Guide 19 Connecting pipe 20 Brine tank 21 Air-cooled chiller unit 22 Generator

Claims (11)

[Claims] Claim 1: A laying member laid on the surface of a foundation having a slope, a cooling pipe piped on the laying member along the foundation surface, ice blocks scattered around the cooling pipe, and a cooling pipe installed inside the cooling pipe. An artificial ski resort consists of an ice layer created by cooling ice blocks and water through a refrigerant, and a layer of snow that accumulates on the surface of the ice layer. 2. The artificial ski resort according to claim 1, wherein the cooling pipe is supported in a hollow manner. 3. The artificial ski resort according to claim 1 or 2, wherein a net-like snow retaining member is laid on the surface of the ice layer or in the middle of the ice layer. 4. A laying member laid on the surface of a foundation having a slope, a cooling pipe piped on the laying member along the foundation surface, ice blocks being scattered around the cooling pipe, and ice cubes being scattered inside the cooling pipe. A slope is formed inside the tent, consisting of an ice layer created by cooling ice blocks and water through a refrigerant, and a snow layer layered on the surface of the ice layer, and the temperature inside the tent is controlled using an air supply means. An artificial ski slope that is lowered and maintained evenly. 5. A double-structured tent consisting of an outer sheet and an inner sheet is used, and the inside of the ventilation section between the outer sheet and the inner sheet is forcedly ventilated from the lower part of the slope to the upper part by an air supply means. artificial ski resort. 6. The artificial ski resort according to claim 4, wherein the outer surface of the tent is colored to reflect sunlight, and the inner surface of the tent is colored to block ultraviolet rays. [Claim 7] Claims 4 to 4, wherein the cooling pipe is supported in a hollow manner.
The artificial ski resort according to claim 6. 8. The artificial ski resort according to claim 4, wherein a net-like snow retaining member is laid on the surface of the ice layer or in the middle of the ice layer. 9. A step of laying a laying member on the surface of a foundation having a slope, a step of piping a large number of cooling pipes for passing a refrigerant on the laying member, and a step of scattering ice blocks around the cooling pipes. A process of passing a refrigerant through a cooling pipe and spraying water while cooling the ice block below the freezing temperature to create an ice layer; A process of layering snow made by crushing ice or artificial snow. , a method for manufacturing an artificial ski resort. Claim 10: Claim 9 wherein the cooling pipe is supported in a hollow manner.
The method for manufacturing the described artificial ski resort. 11. The method for manufacturing an artificial ski resort according to claim 9, further comprising the step of laying a net-like snow retaining member on the ice layer or in the middle of the ice layer.