JPH0341978A - Artificial skiing ground - Google Patents

Abstract

PURPOSE:To prevent moisture from being excessive in the layer of artificial snow and to acquire a ski slope with satisfactory snow quality close to the snow quality in the skiing ground of a cold area with natural snow fall by providing a heat insulating layer on the lower side of a roadbed, where the artificial snow layer is formed on the upper side, arranging the evaporating part of a heat pipe just under the roadbed and arranging the condensing part of the heat pipe in the duct of an antifreeze refrigerant. CONSTITUTION:During a period that an artificial snow layer 15 is formed on a roadbed 12 of a ski slope 16, an indoor atmosphere is cooled at a prescribed temperature by an air conditioning equipment and the artificial roadbed 12 is cooled with a lot of heat pipes 17. For cooling with these heat pipes 17, operating fluid is heated and evaporated by the heat of the artificial roadbed 12 in an evaporating part 17a, which is embedded in the artificial roadbed 12. Then the heat is made steam and moved to a condensing part 17b at a low temperature. The heat, which is thermally transported as evaporated latent heat, is discharged and condensed in the condensing part 17b. Afterwards, the discharged heat is taken away by the antifreeze refrigerant flowing in a large diameter pipe 18a, where the condensing part 17b is arranged, and the condensing part is cooled. The operating fluid, which is condensed in the condensing part 17b, returns to liquid phase and flows back to the evaporating part 17a.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to an artificial ski resort equipped with means for cooling the base of the ski slope.

2. Description of the Related Art Conventional artificial ski slopes, as shown in cross section in Figure 4, are provided with a resin mat layer 2 on the slope road 11 that serves as the ski slope, and on this resin mat layer 2 is a layer of finely crushed powder. It has a structure in which an artificial snow layer 3 is formed by scattering ice.

However, in the case of the artificial ski resort with the conventional structure described above, the artificial snow layer 3 formed on the resin mat layer 2 is melted by geothermal heat from the road 11 on the lower surface side, and When a skier descends, the upper surface is melted by the heat generated by the contact with the skis, and as a result, a large amount of melted water impregnates the artificial snow layer 3, resulting in excessive water content at ski resorts in cold regions due to natural snowfall. The current situation was that the snow quality was much worse than the snow quality.

This invention was made in view of the above circumstances, and provides an artificial ski resort with a ski slope with excellent snow quality that is similar to that of ski resorts in cold regions due to natural snowfall, without excessive water content in the artificial snow layer. It is intended to.

Means for Solving the Problems In order to achieve the above object, the artificial ski resort of the present invention provides a heat insulating layer below the road bed on which the artificial snow layer is formed, and a heat insulating layer immediately below the surface of the road bed. It is characterized in that the evaporating part of the heat pipe is arranged, and the condensing part of the heat pipe is arranged in the flow path of the antifreeze refrigerant.

In addition, a corrugated pipe is used as the heat pipe, and the corrugated heat pipe is installed at an inclination angle of 60 degrees or less! It can be made into 4 buildings.

Furthermore, the antifreeze refrigerant may have a structure that utilizes the cold energy of the liquefied gas tank as a cooling source.

Operation With the above-described configuration, the heat insulating layer formed on the lower surface side of the roadbed blocks heat transfer from underground and cold energy to underground. The evaporation section of the heat pipe then removes heat from the roadbed to cool it. As a result, the artificial snow layer is cooled from below, maintained at a low temperature, and maintained in a high-quality state with low water content, resulting in an artificial snow layer of good quality that is close to the quality of snow on ski slopes in cold regions due to natural snowfall.

In addition, if a corrugated pipe is used as a heat pipe container and the evaporation part of the heat pipe using this corrugated pipe is inclined at an angle of 60 degrees or less with respect to the horizontal, the wave-like recesses inside the corrugated pipe will be activated. The fluid accumulates, and the working fluid accumulated in each recess evaporates at each position, thereby uniformly cooling the roadbed.

In addition, if the cold energy of a storage tank for liquefied gas such as LNG is used as a cold source to cool the antifreeze refrigerant, the antifreeze refrigerant will be efficiently cooled and the artificial snow layer cooled by the beet pipe will be maintained at a low temperature. be done.

EXAMPLE Hereinafter, an example in which the artificial ski resort of the present invention is applied to an indoor artificial ski resort constructed in a relatively warm urban area will be described with reference to FIGS. 1 to 3.

The artificial ski resort 11 is installed in a building (omitted) with a heat-insulating structure, and the artificial roadbed 12 is formed at a predetermined slope.
It is formed on the heat insulating layer 13.

A resin mat 14 is spread over the entire surface of the artificial roadbed 12, and an artificial snow layer 15 is provided on the resin mat 14 to form a slope 16.

In the artificial path 112 of the ski slope 16, each evaporation part 17a of a large number of heat pipes 17 is connected to the slope 16.
Artificial roadbed 1 is arranged diagonally downward from one side (the left side in Fig. 1) according to the slope, and is arranged in parallel at approximately equal intervals.
It is buried just below the surface of 2. The condensing portion 17b formed on the high side of each heat pipe 17 is connected to the slope 1.
Large diameter pipe 1 of refrigerant circulation path 18 provided along an example of 6
8a, and are immersed in the antifreeze refrigerant flowing inside this large diameter W18a. Also, the refrigerant circulation path 18
A refrigerator 18b is interposed on the upstream side of the large diameter pipe 18a,
The antifreeze refrigerant is constantly cooled to around 110° C. by this refrigeration unit 118b.

Next, the operation of this embodiment configured as described above will be explained.

During the period when the artificial snow layer 15 is formed on the artificial roadbed 12 of the slope 16, the artificial ski resort 11 uses air conditioning equipment to cool the indoor atmosphere to a predetermined temperature, and a large number of heat pipes 17 to cool the artificial road. ! [12 is cold fA
Aggressive. Cooling by this heat pipe 17 is performed within the evaporation section 17a buried in the artificial path 112.
The fluid is heated by the heat of the artificial roadbed 12, evaporates, becomes steam, and moves to the low-temperature condensing section 17b. Then, the heat transported as latent heat of vaporization is radiated and condensed in the condensing part 17b, and the released heat is taken away by the antifreeze refrigerant flowing in the large diameter pipe 18a in which the condensing part 17b is disposed, and the condensing part is While being cooled, the working fluid condensed in the condensing section 17b returns to a liquid phase and flows back to the evaporating section 17a.

As a result, when the heat pipe 17 removes heat from the artificial roadbed 12 and cools it, the artificial snow layer 15 is cooled from below through the resin mat 14 to prevent melting, and the artificial snow layer 15 is moistened with water. Maintain the snow quality in the best condition with less.

Also, in this embodiment, instead of the heat vibrator 17,
As shown in FIG. 3, a heat vibe 27 using a corrugated tube as a heat pipe container may be used.
7b in the refrigerant circulation path 28 through which the antifreeze refrigerant R flows, and by setting the inclination angle θ of the evaporator section 27a buried in the artificial roadbed to 60 degrees or less, the working fluid S can flow into each wavy recess inside the corrugated pipe. The artificial roadbed 12 is cooled uniformly by the working fluid S accumulated in each recess evaporating at each position, and the artificial snow layer 15 is uniformly cooled from the lower surface side by this artificial road 1112.
Melting of the artificial snow layer 15 is more effectively prevented than in the case of the straight tube type heat vibrator 17.

In addition, when first forming the artificial snow layer 15 on the artificial roadbed 12 of the slope 16 at the beginning of the ski season, the artificial snow layer 15 is cooled in advance by a number of heat vibrators 17, and then the artificial snow layer 15 is formed by an artificial snow machine. If artificial snow is made to fall on the roadbed 12, the artificial snow will accumulate without melting, and the artificial snow layer 15 can be formed in a short time without waste.

In this embodiment, each heat vibrator 17 is placed at a position lower than the evaporating section 17a@condensing section 17b to achieve a bottom heating state, so that the heat vibrator can operate smoothly.

As described in detail, the artificial ski resort of the present invention is provided with a heat insulating layer below the roadbed on which the artificial snow layer is formed, and an evaporation section of a heat vibrator is arranged directly below the surface of the roadbed. In addition, the condensing part of the Heat Vibe is placed in the flow path of the antifreeze refrigerant, so it cools the artificial snow layer from the bottom side and prevents the artificial snow from melting due to heat from underground. The quality can be maintained in a good condition with little moisture.

In addition, since a heat insulating layer is provided below the roadbed, geothermal heat does not penetrate into the artificial snow layer, and the cold heat from the Heat Vibe does not escape below the heat insulating layer, making the artificial snow layer more efficient. Can be cooled well.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention. Figure 1 is a schematic explanatory diagram of an artificial ski resort, Figure 2 is a sectional view showing an I4 structure of a ski slope, and Figure 3 is a corrugated pipe. FIG. 4 is a cross-sectional view of a heat vibrator manufactured by Manufacturer Co., Ltd., and FIG. 4 is a V cross-sectional view showing the structure of a slope at a conventional artificial ski resort. 11...Artificial ski resort, 12...Artificial roadbed, 1
3... Heat insulation layer, 14... Resin mat, 15...
・Artificial snow layer, 16...Slope, 17.27・
...heat vibrator, 17a, 27a-...evaporation section,
17b. 27b... Condensing section, 18... Refrigerant circulation path, 18
a...Large diameter portion, 18b...Refrigerating machine.

Claims (3)

[Claims] (1) A heat insulating layer is provided below the roadbed on which the artificial snow layer is formed, and the evaporation part of the heat pipe is placed directly below the surface of the roadbed, and the condensation part of the heat pipe is used to distribute the antifreeze refrigerant. An artificial ski resort characterized by being located within the road. (2) The artificial ski resort according to claim 1, wherein the heat pipe uses a corrugated pipe as a heat pipe container, and the corrugated heat pipe is installed at an inclination angle of 60 degrees or less. (3) The artificial ski resort according to claim 1 or 2, wherein the antifreeze refrigerant uses cold heat from a liquefied gas tank as a cooling source.