JPH06103135B2 - Artificial snowfall equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an artificial snowfall device capable of producing a large amount of snow for a variety of researches and experiments with a compact device at low cost and snowfall.

[Prior Art] As a conventional artificial snowfall device, for example, JP-A-61-1655
Examples thereof include those described in Japanese Patent No. 66.

This will be explained with reference to FIG. 5. The upright cooling tower 26
The inner cylinder 27 is installed in the cooling tower 26 in the longitudinal direction, the air in the cooling tower 26 is cooled by the cooler 28, and the inside of the inner cylinder 27 is cooled by the cooled air in the cooling tower 26. Is a cooling system that indirectly cools the air, and is connected by a return pipe 29 that connects the top end and the lower part of the inner cylinder 27, and a variable speed blower 30 is provided in the passage of the return pipe 29. Inner cylinder 27
An ascending air current is generated inside, and a cloud generator 31 supplies supercooled water droplets inside the cooled inner cylinder 27, and ice crystals are supplied from the ice crystal generator 32, and the inner cylinder interior 27 is supplied to the variable speed blower 30. In the cloud, a cloud of supercooled water drops is spilled into the cloud, and ice crystals are suspended in the cloud to sublimate and grow into snow crystals. Increase
It will not be able to be supported by the ascending current and will fall naturally and snow will fall.

In the figure, 33 is a test room, 34 is a sample, 35 is a conveyor belt,
36 is a jet wind tunnel.

[Problems to be Solved by the Invention] Although the vertical low temperature wind tunnel method of the above-mentioned conventional technology produces snow with dendrites because it is the same generation method as natural snowfall, it is grown by floating in the air in the inner cylinder. Therefore, a considerable amount of flight time was required, and there was a problem that the height of the inner cylinder had to be increased to, for example, about 14 m.

In addition, the amount of snow generated is small relative to the volume of the inner cylinder and can be effectively used for certain research and experiments, but it is not suitable for research and experiments that use a large amount of snow. There was a problem that the device had to be made larger in order to increase the number.

For this reason, it is strongly desired to develop an artificial snowfall device that can generate snow with the same dendrites as natural snowfall and that can increase the amount of snow generated without floating in the air in the inner cylinder. Was there.

The present invention has been made to meet the above demand,
In the snowfall room, the catcher is rotated or moved to catch the snow, and the number of collisions of supercooled water droplets in the cloud is increased to sublimate and grow the snow, which can be used for various studies and experiments. It is an object of the present invention to obtain an artificial snowfall device capable of producing snow with equivalent dendrites in large quantities at low cost with a compact device and snowfall.

[Means for Solving the Problems] The present invention has been made to solve the above problems, and employs the means described below.

According to the present invention, a trapping body 8 or 20 provided with a snowfalling means for trapped snow is provided in the cooled snowfall chamber 1 or 15, and the snowfall chamber 1 or
Or, a cloud generator 6 or 19 for continuously supplying supercooled water droplets and an ice crystal generator 5 or 18 for intermittently supplying ice crystals as snow seeds are provided in the inside of the cloud of supercooled water droplets. The traps 8 are rotated or the traps 20 are moved to trap ice crystals or snow in the initial state on the traps 8 or 20, and the number of collisions of snow in the cloud of supercooled water droplets is increased to increase the number of dendrites. Characterized by sublimation and growth of snow with snow.

[Operation] With the configuration of the present invention as described above, supercooled water droplets and ice crystals are supplied into the cooled snow chamber 1 or 15, and ice crystals are conventionally generated in the cloud of the supercooled water droplets. Instead of floating in the air and sublimation growth, the trapping body 8 or in the snow chamber 1 or 15
20 is provided, and the trapping body 8 or 20 is rotated or moved to trap ice crystals or snow in the initial state on the trapping body, sublimate and grow, and at the same time, the snowflakes collide with each other on the trapping body 8 or 20. Since it is made by co-synthesis, snow with dendrites can be produced in large quantities at low cost with a compact device.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, the snow chamber 1 is adjacent to the test chamber 13 with heat insulation. That is, as shown in FIG. 4, the snowfall chamber 1 and the test chamber 13 are separately adjacent to each other and have a window formed therein, and the conveyor belt 12 is provided in this window.

The cooler 3 keeps the inside of the snowfall chamber 1 at a low temperature at which hexagonal snow easily grows, for example, around -15 ° C.

The stirring fan 2 is provided in order to accelerate the temperature drop in the snowfall chamber 1 and at the same time make the temperature distribution uniform. When the temperature in the snowfall chamber 1 drops, the stirring fan 2 is stopped.

In the inner cylinder 9 provided in the snowfall chamber 1, supercooled water droplets are continuously supplied from a cloud generator 6 provided outside the snowfall chamber 1 and ice provided outside the snowfall chamber 1. Crystal generator 5
More ice crystals are intermittently supplied (for example, 1 second in 1 minute), and the inner cylinder 9 is filled with a cloud of supercooled water droplets.

A fan 4 for generating an ascending air current and making the temperature distribution uniform is provided above the inner cylinder 9, and a catcher 8 having a plurality of (for example, four) rotating catching blades 39 is provided below the fan 4. Is provided.

When the capturing body 88 rotates in the inner cylinder 9 filled with the cloud of the supercooled water droplets, ice crystals or snow in the initial state adheres to the net body of the capturing blade 39 of the capturing body 8 to sublimate and grow the snow. Let

By further rotating the capturing body 8, the snow and the snow collide with each other and the combined length can be increased.

In this case, since the capturing body 8 is formed of the mesh body, not only the ventilation is good and it is easy to capture the snow, but also the growth of the snow can be promoted.

The rotation speed of the capturing body 8 can be set arbitrarily, and the snowfall amount can be changed by changing the rotation speed.

An example is shown in Table (1).

Table 1 shows the relationship between the fan speed and the amount of snowfall.

When the capturing body 8 is rotated in this manner, the amount of snowfall can be increased by increasing the number of rotations.

A plurality of capturing wings 39 made of a wire netting or the like are attached to the capturing body 8. A mesh other than metal, such as plastic net, may be used for the capturing blade 39.

Further, as shown in FIG. 3, an impact body 38 for giving an impact for snowfall is attached to the capturing blade 39. The impact body 38 has a structure that opens and closes, and the impact mechanism 7 having a shaft that slides up and down intermittently opens (for example, once in 10 minutes) to control the growth of snow.
You can change the size of snow.

When the impact body 38 opened by the impact mechanism 7 passes through the impact mechanism 7, it is closed by the force of the spring 41, collides with the trapping blade 39, peels off the snow adhering to the trapping blade 39, falls, and can be collected downward. It is desirable that the impact body 38 be a net body to improve ventilation.

At the bottom of the inner cylinder 9, there is provided a conveyor belt 12 for conveying the fallen snow. The conveyor belt 12 is moved at a predetermined speed to convey the snow to the test chamber 13 and at the same time to dry the snow. Wet snow with a moisture content.

That is, the snowfall chamber 1 is adjacent to the test chamber 13 with heat insulation, and at the same time, the temperature of the test chamber is maintained at 0 ° C. or higher, for example, 1 ° C., so that wet snow having an arbitrary water content can be obtained. .

The air in the test chamber 13 is sent to the wind tunnel outlet 10b at the tip of the belt 12 by the jet wind tunnel 10a, and the wind speed blown out from the wind tunnel outlet 10b is variable between 0 and 10 m / s.

The wind blows from the wind tunnel outlet 10b, and the belt 12
The snow is peeled off from above, and it is sprayed on the sample 11.

Furthermore, if a thin wiper 14 is used together with the wind tunnel outlet 10b as an auxiliary means for peeling, peeling is easy. Nylon thread is desirable for this wiper 14, and it is easy to remove snow by reciprocating right and left at high speed.

The amount of snowfall in the above example was 1000 g / H. Under the same conditions, a marked difference is recognized compared to 350 g / H in the conventional device.

Incidentally, the dimensions of the snowfall device of the present invention, in the above embodiment, the width is about 1 m, the depth is about 1 m, the height is about 3 m, the dimension of the conventional vertical wind tunnel snowfall device is about 1.8 m, depth. Compared with the height of about 1.2m and the height of about 14m, it can be made much smaller.

Next, FIG. 2 shows another embodiment of the present invention, showing a capturing body 20 composed of a long mesh belt.

Similar to the first embodiment, the snowfall chamber 15 is adjacent to the test chamber 24 with heat insulation.

The cooler 17 keeps the inside of the snowfall chamber 15 at a low temperature at which hexagonal snow easily grows, for example, around −15 ° C.

The stirring fan 16 is provided for accelerating the temperature drop in the snow chamber 15 and at the same time for making the temperature distribution uniform.
When the internal temperature drops, the stirring fan 16 is stopped.

Inside the snow chamber 15, there is a cloud generator installed outside the snow chamber 15.
Supercooled water droplets are continuously supplied from 19 and the snow chamber 15
An ice crystal generator 18 provided outside the plant intermittently supplies ice crystals as snow seeds (for example, 1 second in 1 minute) to the snowfall chamber.
The inside of 15 is filled with a cloud of supercooled water droplets.

A fan 26 for generating an ascending air current and making the temperature distribution uniform is provided in the upper part of the snowfall chamber 15, and a capturing body 20 composed of a long mesh belt is provided in the lower part of the fan 26. .

The moving speed of the capturing body 20 can be set arbitrarily, and the snowfall amount can be changed by changing and adjusting the moving speed. For example, the amount of snowfall can be increased by reducing the moving speed of the capturing body 20.

In addition, the length of the catcher 20 can be adjusted and the amount of snowfall can be increased by folding the catcher 20 up and down in the snowfall chamber 15.

When the trap 20 moves in the snowfall chamber 15 filled with the cloud of supercooled water drops, ice crystals or snow in the initial state adheres to the trap 20 to sublimate and grow the snow.

By moving the capturing body 20 further, the snow and the snow collide with each other and the combined length can be increased. In this case, since the capturing body 20 is formed of the mesh body, not only is it well ventilated, it is easy to capture the snow, but also the growth of the snow can be promoted.

The capturing body 20 composed of this belt can be used as a transport belt 23 for transporting snow, and the belt 23 is moved at a predetermined speed to transport the snow to the test chamber 24 and at the same time to dry the snow. It can be wet snow with a water content of.
That is, the snowfall chamber 15 is adjacent to the test chamber 24 so as to be heat-insulated, and at the same time, the temperature of the test chamber is maintained at 0 ° C. or higher, for example, 1 ° C., so that wet snow having an arbitrary water content can be obtained. .

The air in the test chamber 24 is sent to the wind tunnel outlet 21b at the tip of the belt 23 by the jet wind tunnel 21a, and the wind speed blown out from the wind tunnel outlet 21b is variable between 0 and 10 m / s.

The wind blows from the wind tunnel outlet 21b, and the wind blows the belt 23
The snow is peeled off from above and sprayed on the test sample 22.

Further, if a thin wiper 25 is provided at the wind tunnel discharge port 21b as an auxiliary means for peeling and this is used together, peeling is easy. Nylon yarn is desirable for the wiper 25, and the snow is easily peeled off by reciprocating right and left at high speed.

The amount of snowfall in the above example was 1000 g / H. Under the same conditions, a marked difference is recognized compared to 350 g / H in the conventional device.

Incidentally, the dimensions of the snowfall device of the present invention, in the above embodiment, the width is about 1 m, the depth is about 1 m, the height is about 3 m, the dimension of the conventional vertical wind tunnel snowfall device is about 1.8 m, depth. Compared with the height of about 1.2m and the height of about 14m, it can be made much smaller.

[Effects of the Invention] Therefore, according to the present invention, supercooled water droplets and ice crystals are supplied into the cooled snowfall chamber, and the ice crystals are suspended in the air in the cloud of the supercooled water droplets to cause sublimation growth. Instead of providing a trap in the snowfall chamber, the trap is rotated or moved to trap ice crystals or snow in the initial state on the trap, sublimate and grow, and at the same time collide with each other on the trap. In this way, snow with dendrites can be produced in large quantities at low cost with a compact device.

[Brief description of drawings]

The drawings show an example of carrying out the present invention. FIG. 1 is a partially cutaway slope view of the snowfall device of the present invention, and FIG. 2 is a partially cutaway slope view of another embodiment of the snowfall device of the present invention. FIG. 3 is a perspective view showing the trap body, FIG. 4 is a vertical sectional view showing the positional relationship between the snowfall chamber and the test chamber, and FIG. 5 is a partially cutaway slope view of the conventional snowfall device. 1, 15 …… Snowfall room, 4,26 …… Fan 5,18 …… Ice crystal generator, 6,19 …… Cloud generator 7 …… Impact mechanism, 8,20 …… Catcher 12,23 …… Conveyor belts 13, 24 …… Test chamber, 39 …… Catching wings

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Taro Mori 5-4-14 Shinjuku, Shinjuku-ku, Tokyo Inside Suga Test Machine Co., Ltd. No. Suga Test Machine Co., Ltd. (72) Inventor Osamu Onozaki 5-14-14 Shinjuku, Shinjuku-ku, Tokyo Suga Test Machine Co., Ltd.

Claims (6)

[Claims] 1. A snow trap (1) or (15) provided with means for dropping snow trapped in a cooled snow trap (1) or (15), said snow trap (1) or (15). A cloud generator (6) or (19) for continuously supplying supercooled water droplets to the inside and an ice crystal generator (5) or (1) for intermittently supplying ice crystals as snow seeds.
8) is provided, and the capturing body (8) is rotated in the cloud of supercooled water drops,
Alternatively, the trapping body (20) is moved to trap ice crystals or snow in the initial state on the trapping body (8) or (20), and the number of snow collisions in the cloud of supercooled water droplets is increased to increase the number of dendrites. An artificial snowfall device characterized by sublimation and growth of snow with snow. 2. An ascending airflow generating fan (4) or (26) is provided above a cooled snowfall chamber (1) or (15), and the fan (4) or (26) is rotated to ascend. Generates an air flow and rotates or moves the traps (8) or (20) to attach ice crystals or snow in the initial state onto the traps (8) or (20), thereby making snow with dendrites. The artificial snowfall device according to claim 1, wherein the artificial snowfall device is grown by sublimation. 3. The artificial snowfall device according to claim 1, wherein a trap (8) comprising a plurality of rotating trap blades (39) is provided below the fan (4). 4. The artificial snowfall device according to claim 1, wherein a catching body (20) made of a long belt body is provided below the fan (26). 5. The artificial snowfall according to claim 1, 2 or 3, characterized in that an impact mechanism (7) for impacting the trapped body (8) having snow adhered and sublimated and grown to give a shock at a constant cycle is provided. apparatus. 6. A test room (13) or (24) is adjacent to a snow room (1) or (15), and the snow room (1) or (15) and the test room (13) or (24) are transported. The belt (12) or (23) communicates with each other, keeps the temperature of the test chamber (13) or (24) at a temperature of 0 ° C. or higher, and conveys snow generated in the snow chamber (1) or (15) to 12) or (23) continuously received, test room (13)
Alternatively, it is possible to control the water content of the snow by transporting it to (24) and at the same time melting dry snow into wet snow and adjusting the moving speed of the transport belt (12) or (23) appropriately. The artificial snowfall device according to claim 1, which is characterized in that.