JPH0345875A - Artificial snowing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an artificial snow making device.

[Prior Art] As a conventional artificial snowmaking device, a water supply header having a large number of water jet nozzles is disposed in the upper part of a test chamber where the temperature inside the room is maintained at sub-zero temperature, and a net screen is installed below this water supply header. A movable brush body is provided to scrape off the ice on the net screen surface as ice chips, and the water mist ejected from the nozzle adheres to the net screen and stagnates, and during this stagnation, JP-A-58-75678 discloses ice that freezes on the net screen, and the ice formed on the net screen is rubbed by a brush body, becomes wood chips, is removed from the net screen, and falls naturally as artificial snow. It is proposed as.

[Problems to be Solved by the Invention] In the above-mentioned prior art, the water mist ejected from the nozzle adheres to and stagnates on the net screen, and during this stagnation, it turns into ice and freezes on the net screen. A mist of water falls from the holes in the net screen, and when this is used for ornamental purposes, it is visually perceived as an unnatural snowfall. In addition, since the ice formed on the net screen is caused to fall naturally as ice flakes by the friction of the brush body, snow only falls on the area where the brush body rubs, and snow does not fall from the net screen surface as a whole. If this is used for ornamental purposes, it will be visually recognized as an unnatural snowfall condition.

Therefore, an object of the present invention is to provide an excellent artificial snow-making device that can create natural snow-fall conditions.

[Means for Solving the Problems] The artificial snow-making device of the present invention includes a snow-making chamber connected to the upper part of the snow-making chamber, a screen having a large number of holes in the lower part of the snow-producing chamber, and a screen having a large number of holes. An injection nozzle that injects gas and water upward is provided, a low-temperature retention space for fog is provided in the injection direction of this injection nozzle, and a W1g device is provided that applies an impact to the screen to cause ice generated on the screen to fall. It is something.

[Operation] With the above configuration, the mist sprayed from the spray nozzle freezes while staying in the low-temperature retention space, adheres to the screen, and grows. The snow thus generated on the screen is given to the screen t! Almost the entire screen falls due to I.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 8, a snow generation chamber 2 is provided in communication with the upper part of the jaw room 1, which is a snow chamber.
A screen 4 having a large number of holes 3 is provided at the lower part of the screen 4, and an injection nozzle 5 for combining and injecting gas and water is provided above the screen 4, and a low-temperature retention space for mist is provided in the injection direction of the injection nozzle 5. 6 is provided, and an *AI device f7 is provided which applies an impact to the screen 4 and causes the snow generated on the screen 4 to fall.

The snow generation chamber 2 is provided with coolers 8 in the upper part and the front and rear measurement parts,
-5°C to -15°C, preferably -11°C by this cooler 8.
It is kept cold at around 0℃. The injection nozzle 5 is provided in one section of the snow generating chamber 2 facing obliquely upward, and first and second temperature sensors 9 and 10 are also provided. Further, a screen 4 is provided at the lower part of the snow generating chamber 2, and a sheet 11 is stretched between the left and right curved portions of the screen 4.

The injection nozzle 5 is a two-fluid fine spray nozzle that combines gas and water and injects the mixture, and is provided with a compressed air inlet 12 on the - side, and this inlet 12 connects to a hole 13 formed in the nozzle periphery.
A water inlet section 15 is provided on the other side, and this inlet section 15 communicates with the injection port 14 through a hole 16 formed in the center of the nozzle, so that compressed air and water can be exchanged. The two meet at the injection port 14 and are injected. Hole 16 in the center of the nozzle
is provided with a needle valve 17, and by manually pushing the pressing part 18, the needle valve 17 passes through the injection port 14 and the injection port 1 is inserted into the injection port 1.
Ice attached to 4 can be removed. Also, injection port 1
A heater (not shown) is attached to the outer peripheral surface of 4.

and a water tank 1 connected to a water supply source (not shown)
9 is intermittently circulated within the water cooler 20 to a temperature of 2°C to 10°C.
The water is cooled to a predetermined temperature, preferably about 4° C., passes through a water strainer 21, and then is pumped by a pump 22 through a first check valve 23 into the inlet portion 15 of the injection nozzle 5 at a rate of 1.0 to 2.0 kg/kg.
Force feed at a pressure of about 112 Cl (solid line arrow in Figure 1)
On the other hand, the compressed air discharged from the compressor 24 is dehydrated by the air dryer 25 and sent to the tank 2G and the valve 27.
, pressure reducing valve 28. 2.0-3. The water is pumped at a pressure of approximately OIg/CI2 (dotted line arrow in Figure 1). In this case, a portion of the water discharged from the pressure pump 22 is returned to the water tank 19. Also, the injection nozzles 51 of the first and second check valves 23.2.9! A solenoid valve 30 for anti-freezing is connected to I via a pipe 31, and when the solenoid valve 30 connects the pipe 31 and stops the pressure pump 22, compressed air flows through the pipe 31. The water is sent under pressure to the inlet 15 of the water injection nozzle 5 to fill the pipe inside the snow generation chamber 2 with air to prevent freezing (arrow at point B in Fig. 1). Three temperature sensors (not shown) are provided.

It is preferable to set the mist sprayed from the spray nozzle 5 so that it spreads at a narrow angle, for example, when the air pressure is 2.8 kg/ci.
*, when the water pressure is 2.0 kg/cmJ, the horizontal 11tIA at the point 15c^ from the injection port 14 is 1 in Figure 5.
It is preferable that the horizontal width B at the 23cm point is about 3CI, the horizontal width B at the 23cm point is about 22cm, and the mist spray length D is about 3.4m.

In addition, the injection nozzle 5 injects upward to lengthen the residence time of the fog in the low-temperature retention space 6 and promote freezing. As the sprayed mist spreads at a narrow angle, the spray length D becomes longer and it is possible to reliably freeze ice before it reaches the screen 4. When the sprayed mist spreads at a wide angle, the spray length D becomes shorter and the water On the other hand, if the angle is too narrow, the snow generation chamber 2 will not be cooled enough and will easily reach the screen 4 as water.
To freeze water at 0℃ higher than the internal temperature, 80c per gram
Since aQ is required, effective spraying is required, and an energy saving effect can be obtained by making the mist spray at a narrow angle. Furthermore, the amount of freezing can be increased by increasing the water pressure or decreasing the air pressure in the same nozzle. Also, the injection nozzle 5
A plurality of them may be provided, or they may be provided on the left and right sides of the snow generating chamber 2 so as to spray from both the left and right sides, or they may be provided at the top and sprayed downward.

A pair of screens 4 are provided at the lower part of the snow generation chamber 2, and an expanded metal 3 is mounted on a metal frame body 32.
3 is tilted. extract band metal 33
The size of hole 3 is 100nn12~50001m! For example, as shown in FIG. 4, the distance Q1 between the centers of the holes 3 in the short direction is about 12 to 22 mm,
The distance Q2 between the centers of the holes 3 in the longitudinal direction is 30.5 to 50.81
If the hole 3 is too large, ice will pass through the hole 3 without growing, and if it is too small, clogging will occur. In addition, the screen 4 is mounted on a support shaft so that one end of the center side of the snow generation chamber 2 is given a downward rotational force in one direction.
4 in a seesaw manner. This rotational force is applied by deviating the position of the support shaft 34 from the center to the other end side and providing a weight 35 at one end. It is held in place by being locked to cushion rubber 37. A motor 38 is provided on the other side of the screen 4.
The arm 4 is attached to the gear-reduced output shaft 39 of the motor 38.
0 is fixed, and a roller 41 is rotatably supported at the tip of this arm 40. Further, near the motor 38, the base end of a hammer arm 42, which engages with a roller 41 and moves up and down when the arm 40 rotates, is connected to a bracket 4 by a support shaft 43.
It is supported by 4. A hammer 45 for striking the screen 4 is provided at the tip of the hammer arm 42. Then, the output shaft 39 of the motor 38 and the arm 40
Two impacts are applied to the screen 4 during one rotation in the counterclockwise direction in FIG. 7 as a single body. First, roller 4
1 is the fl of screen 4! 1rp) When the impact receiving part 46 provided at the end moves downward from the upper position, it pushes down the other #i opening of the screen 4 against the rotational force of the screen 4 in one direction and reaches a point in Fig. 7! The screen 4 is tilted in the opposite direction as shown by the W line, and then the roller 41 and the impact receiving part 46 are disengaged from each other, so that the screen 4 is returned to its original state by a unidirectional rotational force, and the screen 4 is engaged with the cushion rubber 37 to reach the first fIi.
When the roller 41 reaches the upper position, the roller 41 engages with a protrusion 47 protruding from the side of the hammer arm 42 and moves the hammer arm 42. As it is pushed up, the engagement that does not depend on the movement of the roller 41 is disengaged, and the hammer arm 42 falls under its own weight, striking the impact receiving part 46 of the screen 4 and applying an impact mainly from the support shaft 43 to the other side of the screen 4. give. In this way, two impacts are applied to the screen 4 for each rotation of the output shaft 39, and the output shaft 39 rotates by the same degree as l every 2 seconds. By changing the rotational speed of this output shaft 39, the impact cycle can be varied. In this case, the hammer 45 is provided with a soundproof rubber 48.

The jaw room 1 is provided with a see-through plate 49 such as transparent glass on the front, so that the state of snowfall can be visually confirmed. In addition, at the rear of Joe Room 1 is a display panel 5 showing scenery etc.
0 is set. Further, in the jaw room 1, a cooler 52 is provided on the rear surface of the display panel 50 via a partition plate 51, and above the cooler 52, a blower fan 53 serving as an air blower is provided so as to blow air horizontally. There is. The air cooled by the cooler 52 is then transferred to a blower fan 53.
This blows air horizontally through the lower part of the screen 4 as shown by the arrow in FIG. and return the flow.

Further, compressed air is intermittently injected into the injection port 14 of the injection nozzle 5, the cooler 852, etc. to prevent the injection port 14 from freezing and to remove frost from the cooler 8.52.

Next, the operation of the above structure will be explained.

The operation panel (not shown) is equipped with an operating lamp, a power lamp, a monitor lamp for abnormality display, a start switch, a stop switch, an automatic/manual changeover switch, an antifreeze switch, and a snowfall (one-shot start) switch. As shown in the time chart of FIG. 9, when the start switch is first pressed, the cooler 8.52 and the water cooler 20 are activated, which causes the snow generation chamber 2.52 to operate. The inside of Joe Room 1 is cooled down. 1st
When the temperature sensor 9 detects that the room temperature has reached 5°C, the compressor 24. The antifreeze solenoid valve 30° shock device t7 operates to fill the pipes in the snow generation chamber 2 with air to prevent freezing. Furthermore, when the second temperature sensor 10 detects that the room temperature has reached 15°C, the anti-freezing solenoid valve 3
0 returns and shuts off the pipe line 31, and the pressure pump 22
is activated, compressed air and water are combined and injected from the injection nozzle 5. As a result, snow is generated within the snow generation chamber 2 and snow falls within the jaw room 1.

Further, when the stop switch is pressed, the antifreeze operation is performed in the same manner as above, and when it is detected that the room temperature has reached 5°C, all operations are stopped.

Then, the mist sprayed from the spray nozzle 5 toward the wide low-temperature retention space 6 freezes before falling onto the screen 4, adheres to the screen 4, and grows. The snow generated on the screen 4 in this way almost completely falls naturally from the screen 4 due to the impact of the screen 4, and snowfall occurs. In addition, since the air cooled by the blower fan 53 is blown horizontally along the lower surface of the screen 4, the downward airflow from the snow generation chamber 2 is blocked by this airflow, and clouding of the jaw room 1 due to the downward airflow can be prevented. At the same time, the snow falling from the screen 4 falls quietly, giving a more natural feel.

In this embodiment, compressed air and water are combined and injected from the injection nozzle 5 above the screen 4 toward a wide low-temperature retention space, so that the injected mist is sprayed until it falls onto the screen 4. Since the water mist does not fall into the jaw room 1, the impact device 7 applies an impact to the screen 4 and causes the snow generated on the screen 4 to fall, so that almost all of the screen 4 It falls from the entire surface and can achieve natural snowfall conditions, making it a device suitable for AM use. Also, the size of the hole 3 of the screen 4 is set to 100IIllQ to 5
000, and the mist from the injection nozzle 5 is spread at a narrow angle, so that the mist sprayed from the injection nozzle 5 reliably freezes before reaching the screen 4 and removes the snow that has grown on the screen 4. It can snow.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention.1 For example, the screen may be appropriately selected from expanded metal or punched metal, and the impact device It is sufficient to appropriately select a configuration that applies an impact to the screen.

Further, although this embodiment is suitable for ornamental use, it may also be applied to cooling various articles.

[Effects of the Invention] The present invention provides a snow generating chamber in communication with the upper part of the snow generating chamber, a screen having a large number of holes in the lower part of the snow generating chamber, and injects gas and water above the screen. A natural snowfall condition can be created by providing an injection nozzle, providing a low-temperature retention space for fog in the injection direction of the injection nozzle, and providing an impact device that applies an impact to the screen to cause the snow generated on the screen to fall. We can provide excellent artificial snowmaking equipment.

[Brief explanation of drawings]

1 to 9 show one embodiment of the present invention, FIG. 1 is a schematic explanatory diagram of the present invention, FIG. 2 is a sectional view taken along line A-AM in FIG. 1, and FIG. 3 is a cross-sectional view of FIG. BB line sectional view, FIG. 4 is an enlarged sectional view of the main part of FIG. 3, FIG. 5 is an explanatory diagram showing the injection state of the injection nozzle, FIG. 6 is an enlarged sectional view of the injection nozzle, and FIG. 7 8 is a sectional view showing the screen and impact device, and FIG.
FIG. 9 is an enlarged sectional view taken along the line C--C in the figure and is a time chart. 1... Schiller room 2... Lightning generation chamber 3... Hole 4... Screen 5... Injection nozzle 6... Low temperature retention space 7... IIF bombardment device (snow room) Fig. 2 Figure 3 Figure 4 Figure 3 Day Figure 9 Teito Mitsune 1t1 正逼1 (Method 1, Incident Display Hei Ili! 1 Year Patent Application No. 180069 2, Name of Invention Artificial Snow Making Device Correction Person

Claims (1)

[Claims] (1) A snow generating chamber is provided in communication with the upper part of the snow generating chamber, and a screen having a large number of holes is provided at the lower part of the snow generating chamber,
An impact device that includes an injection nozzle that injects gas and water above the screen, a low-temperature retention space for fog in the injection direction of the injection nozzle, and applies an impact to the screen to cause the snow generated on the screen to fall. An artificial snowfall device characterized by being provided with. (2) The area of the hole in the screen is 1
2. The artificial snow-making device according to claim 1, wherein the mist sprayed from the spray nozzle spreads at an angle between 00 mm^2 and 5000 mm^2.