JPH0370156B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an artificial snow making device capable of turning snow obtained by an artificial snow making device into wet snow for use in snow accretion experiments.

Conventional technology For example, as a conventional artificial snowfall device, there is
Examples include those described in Publication No. 165566.

To explain this based on FIG. 2, there is a cooling tower 4 that stands upright, and a snow chamber 1 that is connected to the bottom of the cooling tower 4 and whose opening 3 in the ceiling is covered by the cooling tower 4. a first cooling device 9 that cools the air in the cooling tower 4; and a bottom end that is installed in the cooling tower 4 so as to extend in its length direction and that is connected to the opening 3 of the snow-making chamber 1. An inner cylinder 12 having an opening, a circulation pipe 13 that connects the top end of this inner cylinder 12 and the lower end of the same inner cylinder 12, and a variable speed blower 1 installed in the middle of this circulation pipe 13.
4, a humidifier 15 that supplies water vapor into the inner cylinder 12 near the lower end of the inner cylinder 12;
The humidifier 15 includes a snow seed supply device that supplies ice crystals into the inner cylinder near the humidifier 15.

In addition, there has been no wet snow making device that turns snow obtained by an artificial snow making device into wet snow.

Problems to be Solved by the Invention For example, problems such as power transmission lines being twisted and cut due to snowfall during winter snowfall occur, but this snowfall occurs when the snowfall is wet. .

This snowfall experiment is conducted during winter snowfall, but wet snow is not always available during snowfall; for example, in Hokkaido, wet snow only occurs once a winter. For this reason, in the snow accretion experiment, the outdoor snowpack is loosened with a sieve, turned into powder, and then
This was done by spraying mist water at ℃ to wet it, and causing it to collide with the sample (electrical wire) in a wind tunnel, causing snow to form.

However, although natural snow is used in the above-mentioned snow accretion experiments, its properties are completely different from wet snow that falls during natural snow accumulation, so there is a lack of correlation with natural snow accumulation, making it difficult to conduct accurate snow accretion experiments. There were problems such as not being able to do the following.

For this reason, there is a strong need for the development of an artificial snow making device that can obtain wet snow with properties similar to wet snow that falls during natural snow development, and that can immediately use the wet snow for snow deposition experiments. It was rare.

Furthermore, the snow produced by the conventional artificial snow-making device has the same crystals as snow produced in nature, but this snow is different from snow produced at a low temperature of about -5°C to -15°C. Therefore, the moisture content is low.

Even if snowfall occurs in the sky, if the ground temperature is above 0°C, it becomes wet snow. Therefore, by increasing the temperature of the snow that is generated and falling in the artificial snow-making device, it is possible to turn the snow into wet snow.

However, when the temperature of the snow chamber (test chamber) provided below is raised in order to produce wet snow in the device, the air in the snow chamber rises due to convection, and the inner tube 12 rises.
There was a problem in that the minus-temperature air inside the area fell, and as a result, ice crystals that had not yet grown into snow fell, making it impossible to turn it into wet snow.

For this reason, there has been a strong desire to develop an artificial snow-making device that can turn snow obtained by an artificial snow-making device into wet snow for use in snow deposition experiments.

Summary of the Invention The present invention has been made in response to the above-mentioned demands, and includes an air blower and a temperature/humidity control device installed in an upright inner cylinder for growing snow in an artificial snow-making device, thereby controlling the temperature and temperature of the air above the inner cylinder. To provide an artificial snow-wetting and snow-making device capable of inhibiting convection with moist air, turning snow falling in an inner cylinder into wet snow, and performing snow accretion experiments at any time throughout the year.

Means for Solving the Problems The present invention employs the means described below in order to solve the above problems.

A cloud-forming device 31 and a seeding device 32 are provided directly connected to the upright inner cylinder 30, an air flow velocity adjusting air passage pipe 33 is provided to adjust the flow velocity of the air inside the inner cylinder, and an outer tank 34 is provided to cool the inner cylinder 30. In the human snowmaking device, a cooling device 35 is provided, and a blower device 37 and a temperature/humidity control device 38 are provided below the air outlet 36 of the air flow rate adjusting air path pipe 33 of the upright inner cylinder 30 for growing snow; Air is taken in by the blower device 37, adjusted to the same temperature as the air temperature inside the inner cylinder, and sent into the inner cylinder as a downward airflow. The temperature and humidity are adjusted to a temperature and humidity that is moderately higher than the temperature and humidity, and the air is sent into the inner cylinder as a downward flow, preventing the convection between the upper air in the inner cylinder and the warm and humid air, thereby preventing snow from falling inside the inner cylinder. It is characterized by wet snow.

Function The temperature/humidity control device 38 has the function of turning snowfall into wet snow, and the temperature/humidity control device 38 uses the temperature/humidity supply device 42 to transfer the air sucked by the blower fan 41 to the air above the device 38. The temperature and humidity are adjusted to be moderately higher than the temperature and humidity, and the temperature and humidity are discharged into the inner cylinder from the temperature and humidity control device 38. The temperature and humidity supplied here is controlled by a temperature and humidity controller 54, and the supply amount is adjusted by adjusting the rotation speed of the motor 52 of the blower fan 41 by a fan rotation controller 53 to supply an appropriate amount.

When hot and humid air is fed into the inner cylinder by the above-mentioned means, the air rises due to the convection phenomenon.

To prevent this, a blower device 37 is installed above the temperature and humidity control device 38 to blow air downward into the inner cylinder to suppress the convection phenomenon of the hot and humid air supplied from the temperature and humidity control device 38. have.

That is, the air blown into the inner cylinder is sucked by the blower fan 39, and then supplied by the heater 40 after being adjusted to the same snow forming temperature at that time (for example, -15°C).

The speed of the blowing air at this time is determined by adjusting the rotation speed of the motor 50 of the blowing fan 39 using the fan rotation controller 51.

In this case, the blowing wind speed shall be adjusted to a speed that opposes the rising air current for snow formation and the convection due to the supply temperature and humidity for moistening snow.

Thus, the convection between the air above the blower 37 in the inner cylinder 30 and the warm and humid air is prevented, and the snow falling inside the inner cylinder 30 is turned into wet snow. This wet snow is introduced into the test chamber 55 and subjected to snow accretion experiments, in order to elucidate the development of snow accretion on power transmission lines, develop snow accretion prevention methods, and coating materials, etc.

Embodiment An embodiment of the present invention will be described in detail below based on FIG.

First, the artificial snow-wetting device is constructed as follows.

Inner cylinder 30 stands upright over opening 56 of test chamber 55
is surrounded by an outer tank 34, and this outer tank 34
The air inside is circulated by the circulation fan 58 of the control room 57 of the cooling device 35, and is circulated through the cooler 59 and the heater 6.
The temperature is regulated by 0.

Air inside the inner cylinder 30 is supplied to the inner cylinder 3 by a blower 61.
The air is recirculated from above 0 through the airflow velocity adjusting air path pipe 33, and the air in the inner cylinder is given an upward airflow.

The temperature inside the inner cylinder 30 is indirectly regulated by adjusting the temperature of the air inside the outer tank 34 around the outer periphery, and the temperature is about -5°C to -20°C.

A cloud forming device 31 is connected inside the inner cylinder 30 and supplies clouds (water vapor) into the inner cylinder.

Further, a seeding device 32 is connected to the inner cylinder 30 to supply seeds, which are the core of snow formation, into the inner cylinder.

With the device, snow is generated from clouds and seeds in the inner cylinder 30 cooled to, for example, -15°C. If you slow down the updraft, finer snow will fall, and if you slow down the updraft, the snow will grow large enough to fall against the updraft.

In the above-mentioned snow-making device that artificially generates snow, a blower device 37 is provided below the air outlet 36 of the air flow rate adjusting air pipe 33 that adjusts the internal air flow rate of the upright inner cylinder 30 for growing snow. The blower fan 3 is provided in the blower device 37.
9, for example, sucks cooling air around the outer periphery of the inner cylinder,
The temperature of the air inside the inner cylinder is adjusted to be the same as that of the air inside the inner cylinder by the heater 40, and the air is sent to the air blowing guide 47. An airflow direction plate 45 provided inside provides a downward airflow.

The above-mentioned blowing speed is determined by the motor 5 of the blowing fan 39.
This is done by adjusting the rotation speed of 0 by the fan rotation controller 51. In this case, the blowing air speed is adjusted to a speed that opposes the rising air current for snow formation and the convection due to the supply temperature and humidity for moistening the snow.

The temperature of the heater 40 is controlled by a temperature controller 4.
9.

The air blower 37 is the temperature/humidity control device 3
It has the effect of suppressing the convection phenomenon of the warm and humid air supplied from the temperature and humidity control device 38 by blowing air downward into the inner cylinder.

A temperature/humidity control device 38 is provided below the blower device 37, and a blower fan 41 sucks cooling air around the outer circumference of the inner cylinder 30, and a temperature/humidity supply device 42 adjusts the temperature and humidity. The air is sent to the humidity control body 48, and is blown into the inner cylinder through a plurality of ventilation holes 44 formed around the circumference of the inner cylinder 30, and is directed downward into the greenhouse by the air direction plate 46 provided inside the inner cylinder 30. Air flows.

The temperature and humidity supplied here are controlled by a temperature and humidity controller 54, and the supply amount is controlled by a blower fan 41.
The rotation speed of the motor 52 is adjusted by the fan rotation controller 53, and an appropriate amount is fed.

Although the temperature and humidity control body 48 of the temperature and humidity control device 38 in the embodiment has the ventilation holes 44 and the ventilation direction plate 46 provided at a plurality of locations, the present invention is not limited to this, and the required amount of hot and humid air can be secured. Bye.

In addition, 62 in the figure is the circulation fan 58 of the cooling device 35.
A fan motor 63 is a cooling device installed in the test chamber 55, and a control chamber 64, a cooler 6
5, a heater 66, a circulation fan 67, and a fan motor 68.

Effects of the Invention By having the present invention configured as described above, the upright inner cylinder for growing snow of the artificial snow-making device includes:
By installing an air blower and a temperature/humidity control device, convection between the upper air inside the inner cylinder and the greenhouse air is blocked, and the snow falling inside the inner cylinder is turned into wet snow and introduced into the test chamber. Snow accretion experiments can be conducted at any time throughout the year.

In addition, since the wet snow made into wet snow according to the present invention has the same properties as wet snow that falls in nature, there is a correlation with natural snowfall, and it is possible to conduct accurate snowfall experiments. It is.

As a result, the present invention can greatly contribute to the elucidation of the phenomenon of snow accretion on power transmission lines, the development of methods for preventing snow accumulation, and the development of coating materials. At the same time, it is used not only for snow accumulation experiments on power transmission lines, but also for snow accumulation on roofing materials, aircraft, automobiles, etc., and snow damage.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of the present invention, and FIG. 2 is a partially cutaway slope view of a conventional artificial snow-making device. 30... Inner cylinder, 31... Cloud-forming device, 32... Seeding device, 33... Air flow velocity adjustment wind pipe,
34...Outer tank, 35...Cooling device, 36...Air outlet, 37...Blower device, 38...Temperature and humidity control device, 39...Blower fan, 40...
Heater, 41...Blower fan, 42...Temperature/humidity supply device, 43, 44...Blow hole, 45, 46...Blow direction board, 47...Blower guide, 48...Temperature/humidity control body, 49... ...Temperature controller, 5
0...Motor, 51...Fan rotation controller, 52...Motor, 53...Fan rotation controller, 54...Temperature/humidity controller.

Claims (1)

[Scope of Claims] 1. A cloud-forming device 31 and a seeding device 32 are provided directly connected to the upright inner cylinder 30, and an air flow rate adjusting air pipe 33 is provided to adjust the flow rate of the air in the inner cylinder,
A cooling device 35 is provided in the outer tank 34 for cooling the inner cylinder 30.
In an artificial snow-making device comprising: an air flow velocity adjusting air pipe 33 of an upright inner cylinder 30 for growing snow;
A blower device 37 and a temperature/humidity control device 38 are provided below the air outlet 36 of the blower device 3.
7 takes in air, adjusts it to the same temperature as the air temperature in the inner cylinder, and sends it into the inner cylinder as a downward airflow,
Air is taken in by the temperature/humidity control device 38, adjusted to a temperature and humidity moderately higher than the air temperature/humidity above the device 38, and then sent into the inner cylinder as a downward airflow, thereby controlling the temperature and humidity of the air above the inner cylinder. An artificial snow-wetting device characterized by turning snow falling inside an inner cylinder into wet snow by blocking convection with air. 2. The artificial snow-wetting and snow-making device according to claim 1, characterized in that an air blowing guide 47 and a temperature/humidity control body 48 are provided so as to surround the outer periphery of the inner cylinder. 3. A patent claim characterized in that cooling air around the outer periphery of the inner cylinder is sucked in by a blower fan 39, adjusted to the same temperature as the air inside the inner cylinder by a heater 40, and then sent into the inner cylinder via a blower guide 47. The artificial snow-wetting and snow-making device according to item 1. 4 The cooling air around the outer periphery of the inner cylinder is sucked by the ventilation fan 41, and the temperature and humidity control body 4 is sucked by the temperature and humidity supply device 42.
Claim 1, characterized in that the temperature and humidity are adjusted to be moderately higher than the air temperature and humidity above the air temperature and humidity, and the temperature and humidity are fed into the inner cylinder via the temperature and humidity control body 48.
The artificial snow-wetting device described in Section 1. 5 Air blower 37 and temperature/humidity control device 38
Multiple ventilation holes 4 provided around the inner cylinder to blow air from
3. The artificial snow-wetting and snow-making device according to claim 1, wherein the artificial snow is fed from a source 3,44. 6. The air blowing direction plate 45, 46 is provided in the inner cylinder so that the flow of air sent from the air blowing device 37 and the temperature/humidity control device 38 is directed downward. Artificial snow-wetting equipment. 7 The blower device 37 is connected to a heater 40, a temperature controller 49, a blower fan 39, a motor 50, a fan rotation controller 51, a blower guide 47, and a blower hole 4.
3 and a blow direction plate 45. The artificial snow-wetting and snow-making device according to claim 1, characterized in that the device comprises: 8 The temperature and humidity control device 38 is connected to the ventilation fan 4.
1, motor 52, fan rotation controller 53,
The artificial snow-wetting and snow-making device according to claim 1, characterized in that it is composed of a temperature-humidity supply device 42, a temperature-humidity controller 54, a temperature-humidity control body 48, a ventilation hole 44, and a ventilation direction plate 46.