Snowfall device, artificial weather chamber, and snowfall method

Abstract

This invention provides a snowmaking device, an artificial weather chamber, and a snowmaking method. The snowmaking device (10) includes: a snow storage section (16) for storing snow introduced through an inlet (16c) in a non-freezing state; a snowfall section (20) for introducing and storing snow in the snow storage section (16) and causing the introduced snow to fall; and an adjustment section (18) for adjusting the amount of snow supplied from the snow storage section (16) to the snowfall section (20). The snow storage section (16) includes a container (16a) and a circulation path (16b) connected to both ends of the container (16a) and equipped with a blower (16d). In the snow storage section (16), the snow in the container (16a) is transported by air, flows through the circulation path (16b), and then returns to the container (16a). Accordingly, it is possible to obtain a snowfall amount or snow supply that is not limited by snowmaking capacity.

Description

[0001] This application is a divisional application of patent application No. 202010179297.8, filed on March 13, 2020, entitled "Snowfall Device, Artificial Weather Chamber and Snowfall Method". Technical Field

[0002] This invention relates to a snowmaking device, an artificial weather chamber, and a snowmaking method. Background Technology

[0003] As disclosed in Japanese Patent Publication Nos. 5843240 and 6-63686, snowmaking devices for artificial snowfall are known. For example, the snowmaking device disclosed in Japanese Patent Publication No. 5843240 includes an ice-making chamber equipped with an ice maker and a low-temperature chamber for crushing and granulating ice produced in the ice-making chamber at low temperatures. The granulated artificial snow is then conveyed under pressure towards a wind tunnel. The snowmaking device disclosed in Japanese Patent Publication Nos. 6-63686 includes an ice crystal generating mechanism, a collection chamber for collecting ice crystals generated in the ice crystal generating mechanism, a liquid spraying mechanism for generating fog, and an ultrasonic levitation mechanism for forming a low-temperature ultrasonic field. In this device, fog and ice crystals become snowflakes during the levitation process using the ultrasonic field, and the snowflakes fall naturally.

[0004] The snowmaking devices disclosed in Japanese Patent Publication No. 5843240 and Japanese Patent Publication No. 6-63686 employ a structure that simultaneously produces snow and releases it sequentially. Therefore, the amount of snowfall or snow supply is limited by the snowmaking capacity. In other words, it is impossible to obtain a snowfall exceeding the snowmaking capacity. Summary of the Invention

[0005] The purpose of this invention is to provide a snowmaking device, an artificial weather chamber, and a snowmaking method for obtaining snowfall or snow supply that is not limited by snowmaking capacity.

[0006] The snowfall device of the present invention is characterized by comprising: a snow storage section having an inlet for storing snow introduced through the inlet in a non-freezing state; and a snowfall section for introducing snow stored in the snow storage section and causing the introduced snow to fall or be supplied to a sample, wherein the snow storage section includes a container having the inlet, a blower, and a circulation path connected to the container at both ends and provided with the blower, and the snow storage section includes a structure in which snow is transported in the container along with air mainly from top to bottom through the operation of the blower, and snow flowing out of the container to the circulation path is returned to the container.

[0007] The snow-falling device of the present invention is characterized by comprising: a snow storage unit having an inlet for storing snow introduced through the inlet in a non-freezing state; a supply path; and a snowfalling unit for introducing snow stored in the snow storage unit through the supply path and causing the introduced snow to fall or be supplied to a sample, wherein the snow storage unit includes a container having the inlet and a blower, and the snow storage unit, when the snow is not transported to the snowfalling unit through the supply path, or when the flow rate of the air accompanying the snow transported to the snowfalling unit through the supply path is adjusted, uses the blower to circulate the snow growing in the container, thereby keeping the snow in a non-freezing state and storing it.

[0008] The snowfall method of the present invention utilizes the snowfall device described above, characterized by comprising the following steps: introducing snow into the snow storage section through the inlet of the snow storage section; maintaining and storing the snow in the snow storage section in a non-freezing state; introducing the snow in the snow storage section into the snowfall section; and causing the snow to fall or supplying the snow to a sample through the snowfall section.

[0009] One aspect of the snowfall device according to the present invention includes: a snow storage section having an inlet for storing snow introduced through the inlet in a non-freezing state; and a snowfall section for introducing snow stored in the snow storage section and causing the introduced snow to fall or be supplied to a sample.

[0010] Another aspect of the invention relates to an artificial weather chamber comprising: the snowmaking device; and a test chamber having a space for configuring a sample, wherein the snowmaking device makes snowfall or supplies snow to the sample within the test chamber.

[0011] Another aspect of the present invention relates to a snowfall method comprising the following steps: introducing snow into the snow storage unit through an inlet; maintaining and storing the snow in the snow storage unit in a non-freezing state; introducing the snow in the snow storage unit into a snowfall section; and snowfalling or supplying snow to a sample through the snowfall section.

[0012] According to the present invention, it is possible to obtain snowfall or snow supply that is not limited by snowmaking capacity. Attached Figure Description

[0013] Figure 1 This is a diagram that roughly illustrates the snow-falling device according to the first embodiment.

[0014] Figure 2 This is a diagram that schematically illustrates a snow-falling device according to a variation of the first embodiment.

[0015] Figure 3 This is a diagram that schematically illustrates a snow-falling device according to a variation of the first embodiment.

[0016] Figure 4 This is a diagram that roughly illustrates the snow-falling device according to the second embodiment.

[0017] Figure 5 This is a diagram that schematically illustrates the snow-falling device according to the third embodiment.

[0018] Figure 6 This is a diagram that roughly illustrates the snow-falling device according to the fourth embodiment.

[0019] Figure 7 It is a diagram used to illustrate the structure inside the tank.

[0020] Figure 8 This is a diagram that schematically illustrates the snow-falling device according to the fifth embodiment.

[0021] Figure 9 It is a diagram showing the connection points of the loop path for the container.

[0022] Figure 10 This is a diagram that roughly illustrates the snow-falling device according to the sixth embodiment.

[0023] Figure 11 This is a diagram that roughly illustrates the snow-falling device according to the seventh embodiment.

[0024] Figure 12 This is a diagram that roughly represents the artificial weather chamber involved in the eighth embodiment.

[0025] Figure 13 This is a diagram that schematically illustrates the artificial weather chamber involved in a variation of the eighth embodiment. Detailed Implementation

[0026] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] (First Implementation)

[0028] like Figure 1 As shown, the snowmaking device 10 according to the first embodiment is a device for artificially generating snow and causing the generated snow to fall. The snowmaking device 10 includes an ice crystal generating unit 12, a snowmaking unit 14, a snow storage unit 16, an adjusting unit 18, and a snowfall unit 20.

[0029] The ice crystal generating unit 12 is configured to generate ice crystals that serve as nuclei for snow growth. Ice crystals are produced by freezing fine water droplets generated by a humidifier 13, which may be an ultrasonic humidifier or similar device. The ice crystal generating unit 12 has a hollow shell 12a containing a low-temperature space from which fine water droplets are sprayed in a mist. The temperature inside the shell 12a is, for example, adjusted to below -40°C. Therefore, the fine water droplets in the mist generated by the humidifier 13 and sprayed into the shell 12a freeze inside the shell 12a to generate ice crystals. Ice crystals are ice particles of a size that are suspended in the air without naturally falling. The ice crystals generated in the ice crystal generating unit 12 are piped into the tank 14a of the snowmaking unit 14.

[0030] The snowmaking unit 14 is a section for producing snow and has a tank 14a that forms a space for snow growth. Ice crystals generated in the ice crystal generation unit 12 are introduced into the tank 14a. Meanwhile, inside the tank 14a, low-temperature water droplets are sprayed out in a mist form through nozzles 14b. The nozzles 14b are located in the lower part of the tank 14a and spray water droplets upwards in a mist form. The nozzles 14b are located at multiple locations on the side of the tank 14a. The nozzles 14b may also be composed of two-fluid nozzles. Ice crystals are supplied into the tank 14a from the upper part of the tank 14a. The temperature inside the tank 14a is adjusted to approximately -20°C by the cooler 26 of the snowmaking circulation path 22 (described later). Inside the tank 14a, the ice crystals come into contact with the mist-like water droplets, and the ice crystals become nuclei and grow into snowflakes. The grown snowflakes are discharged from the upper part of the tank 14a to the loading path 22a (described later) by the operation of the blower 22c (described later). A large amount of snow flakes, or snow, is introduced into the snow storage section 16 through the conveying road 22a.

[0031] The snow storage unit 16 has a container 16a into which snow generated by the snowmaking unit 14 is introduced, and a circulation path 16b connected to the container 16a. The snow storage unit 16 has an inlet 16c for introducing snow. The inlet 16c is provided in the container 16a. The container 16a is configured to temporarily store the amount of snow for a predetermined period of time, such as a set test time. The lower part of the container 16a is configured to slope downwards towards the center. Therefore, snow tends to fall towards the center.

[0032] One end of the circulation path 16b is connected to the lower part of the container 16a, and the other end is connected to the upper part of the container 16a. A blower 16d is provided in the circulation path 16b. Therefore, in the snow storage section 16, through the operation of the blower 16d, snow in the container 16a is transported by air, drawn from the lower part of the container 16a into the circulation path 16b, and the air accompanying the snow flowing in the circulation path 16b returns from the upper part of the container 16a back into the container 16a. This cycle is repeated. In other words, the snow storage section 16 has a structure that circulates the air accompanying the snow. Furthermore, an air inlet (not shown) is provided in the circulation path 16b upstream of the blower 16d. Accordingly, even when snow is supplied via the supply path 28 (described later), a near-vacuum low pressure is prevented in the circulation path 16b upstream of the blower 16d.

[0033] Because the snow is transported by air and circulated in container 16a and circulation path 16b, the snow is stored in a flowing state rather than in a accumulated state within container 16a. Therefore, the snow does not freeze for a long time in the snow storage section 16 and remains in a snowy state. That is, the snow storage section 16 has a mechanism for keeping the snow in the snow storage section 16 in a non-freezing state.

[0034] The tank 14a of the snowmaking unit 14 and the container 16a of the snow storage unit 16 are connected to each other via the snowmaking circulation path 22. The snowmaking circulation path 22 is provided to circulate the air accompanying the snow between the snowmaking unit 14 and the snow storage unit 16. In addition, in this embodiment, since a cooler 26 is provided in the snowmaking circulation path 22 as described later, the snowmaking circulation path 22 has the function of maintaining the snowmaking unit 14 and the snow storage unit 16 at a predetermined temperature.

[0035] The snowmaking circulation path 22 includes: an inlet path 22a for transferring snow from the tank 14a of the snowmaking section 14 to the container 16a of the snow storage section 16; and a return path 22b for returning small snowflakes present in the container 16a of the snow storage section 16 back to the tank 14a of the snowmaking section 14. That is, snow produced in the snowmaking section 14 is transferred to the snow storage section 16, while small snowflakes that have not fully grown are returned from the snow storage section 16 to the snowmaking section 14 so that they can grow further in the snowmaking section 14.

[0036] One end of the inlet channel 22a is connected to the upper part of the tank 14a of the snowmaking unit 14, and the other end of the inlet channel 22a is connected to the upper part of the container 16a of the snow storage unit 16. The container 16a of the snow storage unit 16 is circular when viewed from above. The other end of the inlet channel 22a is not connected to the container 16a towards the center of the container 16a, but rather towards a position offset to the side from the central longitudinal axis of the container 16a. That is, the inlet channel 22a is connected to the container 16a in such a way that it generates a circulating flow of air rotating circumferentially around the central longitudinal axis within the container 16a.

[0037] One end of the return path 22b passes through the upper central portion of the container 16a and is positioned within the upper part of the container 16a of the snow storage section 16. Therefore, it primarily draws in snow located near the central longitudinal axis from within the container 16a. A blower 22c is provided in the return path 22b. Through the operation of the blower 22c, air circulates between the tank 14a of the snowmaking section 14 and the container 16a of the snow storage section 16.

[0038] By operating the blower 22c of the return path 22b, air inside the container 16a is drawn from one end of the return path 22b. Within the container 16a, as described above, a circulating flow of air is generated, rotating circumferentially around the central longitudinal axis. Therefore, there is a tendency for heavier snowflakes to be concentrated towards the periphery of the container 16a, while lighter snowflakes tend to be concentrated towards the center of the horizontal plane within the container 16a. Consequently, lighter snowflakes are more easily drawn into the return path 22b.

[0039] A cooler 26 is provided in the snowmaking circulation path 22. Therefore, the air circulating between the snowmaking section 14 and the snow storage section 16 is cooled by the cooler 26. Consequently, the temperature inside the container 16a of the snow storage section 16, the snowmaking circulation path 22, and the tank 14a of the snowmaking section 14 is adjusted to approximately -20°C. Furthermore, in this embodiment, the cooler 26 is located in the return path 22b, but it is not limited to this; for example, it can be located in the inlet path 22a, or it can be located on a piping independent of the snowmaking circulation path 22.

[0040] A supply path 28, which is connected to the snowfall section 20, is connected to the circulation path 16b. Therefore, at least a portion of the snow-laden air flowing in the circulation path 16b can be directed to the snowfall section 20 via the supply path 28.

[0041] The regulating unit 18 adjusts the snow supply from the snow storage unit 16 to the snowfall unit 20. Specifically, the regulating unit 18, under the instruction from the snowfall setting device 30, adjusts the supply flow rate of the air accompanying the snow to the snowfall unit 20. The regulating unit 18 has a first damper 18a disposed downstream of the connection of the supply path 28 in the circulation path 16b and a second damper 18b disposed in the supply path 28. The snowfall setting device 30 controls the opening degree of the first damper 18a and the second damper 18b according to the set snowfall amount. In addition, the snowfall amount set in the snowfall setting device 30 represents the amount of snow accumulated per unit time.

[0042] At least a portion of the air flowing in the circulation path 16b, carrying snow, is introduced into the snowfall section 20. The snowfall section 20 has a snow outlet 20a for causing the introduced snow to fall. Snow from the snow outlet 20a is diffused by a diffusion member (not shown) to fall. When the snowfall device 10 is installed in a test chamber (not shown), the snowfall section 20 can be positioned above or away from the area where the test specimen is placed within the test chamber. Alternatively, the snow outlet 20a may not be configured to fall snow within the test chamber, but rather to be positioned, for example, to the side of the area where the test specimen is placed, and to blow snow towards the test specimen. It may also employ a structure where snow is blown from the snow outlet 20a in a direction different from the test specimen, rather than directly towards the test specimen, and the snow is ultimately supplied to the test specimen. In this case, it may also be positioned above an area away from the area where the test specimen is placed. Alternatively, if the snowfall device 10 is used outdoors, the snowfall section 20 may also be positioned outdoors.

[0043] Alternatively, a structure can be adopted in which snow is blown directly from the snow outlet 20a without restricting the pipe constituting the supply path 28 at the snow outlet 20a. However, instead of this structure, a structure can be adopted in which the snow outlet 20a is constituted by a snow-falling nozzle that restricts the pipe constituting the supply path 28, and snow falls from the snow-falling nozzle.

[0044] The snow introduced into the snowfall section 20 is dry snow. Therefore, the snowfall section 20 is provided with a nozzle 32 that sprays water in a mist onto the introduced dry snow. This allows wet snow to fall from the snowfall section 20. Alternatively, a structure in which the nozzle 32 is omitted and dry snow falls from the snowfall section 20 can also be used.

[0045] A nozzle 32 that sprays water in a mist towards the snow is connected to a water supply pipe 33 that supplies water to the nozzle 32. A water flow adjustment valve 33a is provided in the water supply pipe 33. The water flow adjustment valve 33a is configured to adjust the spray volume according to a command from a moisture content setter 34. The moisture content setter 34 is a device used to set the moisture content of the snow falling from the snowfall section 20, and outputs a command corresponding to the set moisture content. The water flow adjustment valve 33a adjusts its opening according to this command. Accordingly, the spray volume of water from the nozzle 32 is adjusted. That is, the snowfall section 20 is configured to produce snow corresponding to the set moisture content. Alternatively, the moisture content setter 34 can be configured to change the set moisture content. In this case, snow with various moisture contents can be produced, and the snow quality can be changed. When adjusting the water flow using the water flow adjustment valve 33a, the set snowfall amount of the snowfall amount setter 30 can also be considered. Furthermore, if the snowfall section 20 is designed to deliver wet snow with a specified moisture content, the nozzle 32 can also be configured to spray a specified amount of water in a mist. In this case, the moisture content setter 34 is omitted. However, when the moisture content setter 34 is omitted, the water volume adjustment valve 33a is configured to adjust the water volume according to the set snowfall amount of the snowfall setter 30 when the snowfall amount changes. Alternatively, a structure can be adopted in which the water spray volume is directly adjusted at the nozzle 32.

[0046] Alternatively, a spray volume setter can be installed instead of a moisture content setter 34. In this case, the opening of the water volume adjustment valve 33a or the spray volume of the nozzle 32 is adjusted to achieve the spray volume set by the spray volume setter. In this configuration, the moisture content of the snow falling from the snowfall section 20 can also be adjusted.

[0047] Here, the snowfall method performed by the snowfall device 10 according to the first embodiment will be described. First, ice crystals are generated in the ice crystal generating section 12. To generate ice crystals, fine water droplets are generated by the humidifier 13, and these water droplets are sprayed into the housing 12a of the ice crystal generating section 12. Since the temperature inside the housing 12a of the ice crystal generating section 12 is adjusted to, for example, below -40°C, the sprayed mist-like fine water droplets freeze and generate ice crystals.

[0048] Ice crystals generated in the ice crystal generation section 12 are introduced into the tank 14a of the snowmaking section 14. Inside the tank 14a of the snowmaking section 14, the temperature is adjusted to approximately -20°C, and fine water droplets are sprayed in a mist form from the nozzle 14b. As a result, the ice crystals become nuclei and grow into snowflakes. A large quantity of snowflakes, i.e., snow, is introduced into the snow storage section 16 via the inlet 22a. That is, the snow generated in the snowmaking section 14 is introduced into the container 16a of the snow storage section 16 through the inlet 16c.

[0049] In the snow storage section 16, by the operation of the blower 16d, snow in container 16a is transported by air and drawn from the lower part of container 16a into circulation path 16b. The air accompanying the snow flowing in circulation path 16b returns from the upper part of container 16a back into container 16a. This cycle is repeated. Accordingly, in the snow storage section 16, snow is kept in a non-freezing state and stored.

[0050] On the other hand, small, incompletely grown snowflakes are returned from the container 16a of the snow storage section 16 to the snowmaking section 14 via the return path 22b. In the snowmaking section 14, the small snowflakes are further grown, and the grown snowflakes are introduced into the container 16a of the snow storage section 16 via the loading path 22a.

[0051] The snow accumulation in the snow storage section 16 occurs before the snowfall. Therefore, snow can be pre-made and stored before the instruction from the snowfall setting device 30 is sent to the regulating section 18. At this time, the second airlock 18b is closed and the first airlock 18a is fully open. Therefore, in the snow storage section 16, the air accompanying the snow is not delivered to the snowfall section 20, but circulates between the container 16a and the circulation path 16b.

[0052] If a command is sent from the snowfall setting device 30 to the adjustment unit 18, the adjustment unit 18 adjusts the opening of the first airlock 18a and the second airlock 18b to adjust the airflow corresponding to the command. Accordingly, at least a portion of the snow flowing in the circulation path 16b is guided to the snowfall unit 20 via the supply path 28. Furthermore, by sending a command from the snowfall setting device 30, the amount of snowfall during snowfall can be changed. At this time, it is possible to change the amount of snowfall while snowfall is occurring.

[0053] In the snowfall section 20, the opening of the water volume adjustment valve 33a is adjusted according to the command from the moisture content setting device 34. Accordingly, the spray volume of water from the nozzle 32 is adjusted, and the snow becomes wet snow with the desired moisture content. This wet snow is then sprayed out from the snow outlet 20a. Furthermore, the adjustment of the water spray volume can also be based on the set snowfall amount of the snowfall setting device 30.

[0054] As explained above, in this embodiment, snow stored in the snow storage section 16 is allowed to fall through the snowfall section 20 or be supplied to the sample. That is, for example, when snow generated in the snowmaking section 14 is introduced into the snow storage section 16, the amount of snow introduced into the snowfall section 20 per unit time from the snow storage section 16 can exceed the snowmaking capacity of the snowmaking section 14 per unit time. Furthermore, the amount of snow that falls or is supplied to the sample via the snowfall section 20 within a predetermined time can also be stored in the snow storage section 16. Therefore, unlike structures that simultaneously make snow and allow snowfall sequentially, the amount of snowfall or snow supply is not limited by the snowmaking capacity. Therefore, in this snowfall device 10, the amount of snowfall or snow supply can be obtained without being affected by the snowmaking capacity. Moreover, since the snow is kept in a non-frozen state in the snow storage section 16, snowfall can occur from the snowfall section 20 simply by introducing the snow stored in the snow storage section 16 into the snowfall section 20. In addition, the snow storage section 16 only needs to keep the snow in a state that prevents it from freezing, so it does not need to have the function of making the snow grow, nor does it need to have the function of generating snow.

[0055] Furthermore, in this embodiment, since an adjustment unit 18 is provided to adjust the amount of snow transported from the snow storage unit 16 to the snowfall unit 20, the amount of snowfall in the snowfall unit 20 can be changed. Therefore, the amount of snowfall can also be varied.

[0056] Furthermore, in this embodiment, since a mechanism is provided to keep the snow in a non-freezing state, the snow stored in the snow storage section 16 is less likely to freeze. Therefore, the time for which the snow is kept in a snow-like state can be extended. That is, a mechanism is provided in the snow storage section 16 to not only temporarily prevent the snow stored in the snow storage section 16 from freezing, but also to maintain the snow from freezing. Accordingly, it is possible to keep the snow-like state for a longer period of time.

[0057] Furthermore, in this embodiment, the snow storage unit 16 has a structure that circulates the air accompanying the snow. Therefore, the snow is stored in the snow storage unit 16 in a constantly moving manner. Thus, the snow can be kept in a non-freezing state for a long time within the snow storage unit 16.

[0058] Furthermore, in this embodiment, air flows through the circulation path 16b via the operation of the blower 16d configured in the circulation path 16b. Accordingly, snow within the container 16a of the snow storage section 16 is transported by air and flows through the circulation path 16b. The air accompanying the snow flowing through the circulation path 16b returns to the container 16a. Thus, the air accompanying the snow is circulated through the circulation path 16b, thereby preventing the snow from freezing. Moreover, compared to a structure where only the air accompanying the snow circulates within the container 16a, it is possible to prevent the container 16a from becoming too large.

[0059] Furthermore, in this embodiment, the regulating unit 18 adjusts the air diversion ratio from the circulation path 16b in such a way that at least a portion of the air flowing in the circulation path 16b along with the snow is introduced into the snowfall section 20. In other words, the amount of snow delivered to the snowfall section 20 can be adjusted by simply adjusting the ratio of the snow circulating in the circulation path 16b to the snow introduced into the snowfall section 20.

[0060] Furthermore, in this embodiment, since the snowfall section 20 sprays water in a mist form corresponding to the set moisture content onto the snow, snowfall with the desired snow quality can be achieved. Additionally, the snow quality can be changed by altering the set moisture content.

[0061] Furthermore, in this embodiment, since a snowmaking unit 14 is provided, it is not necessary to bring in snow stored in the snow storage unit 16 from outside the snowfall device 10. The amount of snow introduced from the snow storage unit 16 to the snowfall unit 20 per unit time can also exceed the snowmaking capacity of the snowmaking unit 14 per unit time. Therefore, it is possible to snow or supply the sample body with an amount of snow exceeding the snowmaking capacity of the snowmaking unit 14.

[0062] Furthermore, in this embodiment, a snowmaking circulation path 22 is provided to circulate the air accompanying the snow between the snowmaking section 14 and the snow storage section 16. Therefore, even if incompletely grown snow is introduced from the snowmaking section 14 into the snow storage section 16, the snow can be grown by returning the incompletely grown snow to the snowmaking section 14.

[0063] Furthermore, in this embodiment, an ice crystal generation unit 12 is provided, and ice crystals are used to make snow in the snow-making unit 14, so snow can easily grow. Therefore, snow can be made even without lowering the temperature inside the snow-making unit 14 to about -40°C.

[0064] Furthermore, in the first embodiment, an ice crystal generating section 12 is provided, and the snowmaking section 14 is a structure that uses ice crystals as nuclei and allows them to grow to generate snow flakes, but it is not limited to this structure. Figure 2 As shown, the ice crystal generating section 12 can also be omitted, and the space inside the tank 14a of the snowmaking section 14 can be adjusted to a temperature of -40°C or lower, for example. That is, the snowmaking section 14 is constructed using an ice maker that generates snow flakes from tiny water droplets sprayed in a mist from the nozzle 14b. Alternatively, another type of ice maker can be used to construct the snowmaking section.

[0065] In addition, it can also be like Figure 3 The snowmaking unit 14 itself is omitted from the diagram. In this case, the snow created outside the snowmaking device 10 is introduced into the container 16a of the snow storage unit 16 through the inlet 16c. Furthermore, the location of the inlet 16c is not limited to... Figure 3 Its position, for example, can also be configured in the top part of container 16a.

[0066] (Second Implementation)

[0067] In the first embodiment, the snow storage unit 16 has a structure comprising a container 16a and a circulation path 16b, and the air accompanying the snow circulates between the container 16a and the circulation path 16b. In contrast, in the second embodiment, the circulation path 16b is omitted, and, as... Figure 4 As shown, an air supply section 38 is provided to blow low-temperature air into the container 16a from its lower part. In this structure, snow in the container 16a is stored in a flowing state by the blown-in air. That is, the snow storage section 16 has a mechanism to keep the snow in the snow storage section 16 in a non-freezing state. In this structure, since the circulation path 16b is omitted, a supply path 28 is connected to the lower part of the container 16a of the snow storage section 16, and a blower 28a is arranged in the supply path 28. Furthermore, the regulating section 18 has an airlock 18b arranged in the supply path 28.

[0068] In addition, other structures, functions and effects are omitted from the description, but the description of the first embodiment can be applied to the second embodiment.

[0069] (Third Implementation)

[0070] In the third embodiment, such as Figure 5 As shown, the mechanism for keeping the snow in the snow storage section 16 in a non-freezing state is composed of a vibrating section 39 that applies vibration to the container 16a. Specifically, the vibrating section 39 is configured to impact the container 16a by striking its lower part from below, thereby causing the container 16a to vibrate. In this structure, the circulation path 16b is also omitted; therefore, a supply path 28 is connected to the lower part of the container 16a in the snow storage section 16, and a blower 28a is arranged in the supply path 28. Furthermore, the adjustment section 18 is equipped with an airlock 18b arranged in the supply path 28.

[0071] The vibrating part 39 can also vibrate the supply path 28 to suppress snow from adhering to the supply path 28.

[0072] In addition, the descriptions of other structures, functions and effects are omitted, but the descriptions of the first embodiment can be applied to the third embodiment.

[0073] (Fourth Implementation)

[0074] In the first embodiment, a structure was adopted in which ice crystals are generated in the ice crystal generation section 12. In contrast, in the fourth embodiment, as... Figure 6As shown, a structure is adopted in which air at approximately -40°C is introduced into the tank 14a of the snowmaking unit 14. At this time, the air-guiding pipe 61 is connected to the tank 14a. Furthermore, a cooling device 60 is provided to cool the air flowing within the pipe 61 to approximately -40°C (e.g., -35°C to -45°C). Additionally, the air introduced into the tank 14a is preferably dry air.

[0075] Air cooled by cooling device 60 is introduced into tank 14a of snowmaking unit 14 via piping 61. Piping 61 is as follows: Figure 7 The nozzle 14b, as shown, is connected to the tank 14a in such a way that air is directed toward water ejected from the nozzle 14b disposed within the tank 14a. The nozzle 14b is also configured to spray water toward the side of the tank 14a. This nozzle 14b is configured to spray fine water droplets generated by the ultrasonic humidifier in a mist-like manner. However, the nozzle 14b may also be configured not to spray water toward the side, but rather to spray water toward the center of the tank 14a.

[0076] In the first embodiment, a return path 22b is connected to the lower part of the tank 14a. In contrast, in the fourth embodiment, the return path 22b is connected to the lower part of the side of the tank 14a. Figure 7 As shown, the return path 22b is connected to the tank 14a at a position offset laterally from the central longitudinal axis (vertical axis) of the tank 14a, so that the air accompanying the snow flows circumferentially along the side of the tank 14a. Therefore, within the tank 14a, a swirling flow of air accompanying the snow is generated, circulating around the longitudinal axis. On the other hand, as... Figure 6 As shown, the inlet channel 22a is positioned at the center of the top of the can 14a, causing the air inside the can 14a to swirl and flow upwards. By generating a spiral airflow inside the can 14a, snow adhering to the inner surface of the can 14a can be allowed to fall off, thus preventing snow from adhering to the inner surface of the can 14a. Furthermore, by generating a spiral airflow, the snow inside the can 14a can be kept from freezing. Additionally, the inner surface of the can 14a can be treated with surface treatments such as waterproofing, hydrophilic treatment, or mirror finishing.

[0077] It can also be like Figure 6 The snowmaking unit 14 is shown with a vibration unit 62 that vibrates the canister 14a or the loading channel 22a. Vibration of the canister 14a or the loading channel 22a suppresses snow adhesion inside the canister 14a or the loading channel 22a. The vibration unit 62 is configured to vibrate the canister 14a or the loading channel 22a by applying an impact to it or by shaking it. The vibration unit 62 may also be omitted.

[0078] The excitation unit 62 can also be configured to vibrate the return path 22b. In this case, it is possible to suppress snow from adhering to the return path 22b. In addition, an excitation unit (not shown) that vibrates the container 16a or the circulation path 16b of the snow storage unit 16, and an excitation unit that vibrates the first airlock 18a (not shown) may also be provided. The excitation unit 62 that vibrates the snowmaking unit 14, the excitation unit that vibrates the snow storage unit 16, and the vibration unit that vibrates the first airlock 18a may also be provided in the first to third embodiments.

[0079] In addition, the descriptions of other structures, functions and effects are omitted, but the descriptions of the first to third embodiments can be applied to the fourth embodiment.

[0080] (Fifth Implementation)

[0081] In the first embodiment, the container 16a of the snow storage unit 16 and the tank 14a of the snow making unit 14 are constructed independently. In contrast, in the fifth embodiment, as... Figure 8 As shown, the tank 14a of the snowmaking unit 14 and the container 16a of the snow storage unit 16 are integrally formed, and the tank 14a and the container 16a are composed of a hollow body 63 that forms an internal space connected to each other.

[0082] A nozzle 14b is disposed within the hollow body 63, which sprays out fine water droplets generated by an ultrasonic humidifier in a mist. Air cooled to approximately -40°C from the piping 61 is blown towards the water droplets sprayed from the nozzle 14b. Since snow is generated around and above the nozzle 14b, the area around and above the nozzle 14b within the hollow body 63 functions as a tank 14a for the snowmaking unit 14. The snow generated within the tank 14a falls below the nozzle 14b.

[0083] As described later, the circulation path 16b is connected to the hollow body 63 below the nozzle 14b. Therefore, the portion of the hollow body 63 below the nozzle 14b functions as the container 16a of the snow storage section 16. Thus, the inlet 16c of the container 16a is formed in the portion of the hollow body 63 located below the nozzle 14b and above the blowing end of the circulation path 16b.

[0084] One end of the circulation path 16b (the blowing end that introduces air into the container 16a) is connected to the side of the hollow body 63 (the side of the container 16a of the snow storage section 16) below the nozzle 14b. This blowing end is as follows: Figure 9As shown, the circulation path 16b is connected to the side of container 16a in a manner that causes air to flow in a direction offset to the side relative to the centerline 16e extending vertically along container 16a. Specifically, container 16a is circular in top view, and circulation path 16b is connected to container 16a by its extension passing off the centerline 16e of the circle. The other end of circulation path 16b (the end on the side that draws air in from container 16a) is connected to the bottom of hollow body 63, i.e., the bottom of container 16a.

[0085] Therefore, when the blower 16d configured in the circulation path 16b operates, air accompanying the snow is drawn into the circulation path 16b from the bottom of the container 16a. After flowing through the circulation path 16b, this air is blown out of the circulation path 16b into the container 16a. Accordingly, a circulating flow of air accompanying the snow is generated in the container 16a such that the air accompanying the snow rotates circumferentially along the inner surface of the container 16a. Therefore, the snow generated in the tank 14a and the snow blown out from the circulation path 16b into the container 16a are stored in the container 16a while flowing. That is, the snow is not stored in a accumulated state in the container 16a, but in a flowing state. Therefore, the snow in the snow storage section 16 does not freeze for a long time, but remains in a snow state. That is, the snow storage section 16 has a mechanism for keeping the snow in the snow storage section 16 in a non-freezing state.

[0086] A connecting path 64 branches off from the circulation path 16b. One end of the connecting path 64 is connected to the downstream side of the blower 16d in the circulation path 16b, and the other end is connected to the top of the tank 14a (hollow body 63). A portion of the air flowing in the circulation path 16b, carrying snow, flows into the connecting path 64. This air contains small snowflakes. Since the other end of the connecting path 64 is connected to the tank 14a, the small snowflakes are supplied into the tank 14a of the snowmaking section 14. Because fine water droplets are sprayed in a mist from the nozzle 14b in the snowmaking section 14, the small snowflakes can grow. Furthermore, since the other end of the connecting path 64 is connected to the central part of the top of the tank 14a, the snow blown into the tank 14a from the connecting path 64 is less likely to adhere to the inner wall of the tank 14a.

[0087] A cooler 65 is provided in the connecting passage 64 to cool the air flowing in the connecting passage 64 along with the snow. The cooler 65 has the ability to cool the air to the temperature at which snow is generated in the tank 14a or at the temperature at which fine snowflakes grow in the tank 14a. The cooler 65 is, for example, an evaporator of a vapor compression refrigeration machine. Alternatively, the cooler 65 may be provided in the circulation passage 16b instead of the connecting passage 64.

[0088] In addition, the descriptions of other structures, functions and effects are omitted, but the descriptions of the first to fourth embodiments can be applied to the fifth embodiment.

[0089] (Sixth Implementation Method)

[0090] In the fifth embodiment, the snowmaking unit 14's tank 14a is positioned above the snow storage unit 16's container 16a. In contrast, in the sixth embodiment, as... Figure 10 As shown, the tank 14a of the snowmaking unit 14 is disposed in the container 16a of the snow storage unit 16.

[0091] The can 14a has a cylindrical wall portion 14c and a tapered inclined portion 14d connected to the lower end of the wall portion 14c. The upper end of the wall portion 14c is connected to the top of the container 16a; however, a gap may be formed between the wall portion 14c and the top of the container 16a. The cylindrical wall portion 14c is positioned to move inward from the side of the container 16a, and the inclined portion 14d is positioned to move inward from the bottom of the container 16a. Therefore, an inner space and an outer space are formed within the container 16a, separated by the can 14a. A nozzle 14b is disposed within the can 14a. Therefore, the nozzle 14b is disposed within the inner space.

[0092] An opening 14e is formed at the lower end of the inclined section 14d, connecting the inner and outer spaces. Snow generated inside the tank 14a falls through this opening 14e and is guided into the outer space. Therefore, the opening 14e functions as the inlet 16c of the container 16a of the snow storage section 16. One end of the circulation path 16b (the end on the blowing side) is connected to the bottom of the container 16a, and the other end of the circulation path 16b (the end on the blowing side) is connected to the side of the container 16a. A blower 16d is provided in the circulation path 16b. Although the other end of the circulation path 16b is positioned above the nozzle 14b, it can also be positioned below the nozzle 14b.

[0093] A connecting path 64 branches off from the circulation path 16b. One end of the connecting path 64 is connected to the downstream side of the blower 16d in the circulation path 16b, and the other end is connected to the center of the top of the tank 14a of the snowmaking unit 14. Therefore, the air flowing along the snow in the connecting path 64 is introduced into the tank 14a. An airlock 66 is provided in the connecting path 64. If snow generation in the tank 14a ends, the airlock 66 closes. Alternatively, the airlock 66 can be omitted.

[0094] Cooler 65 Figure 10 It can be configured in loop path 16b, but it can also be configured in connection path 64.

[0095] In addition, the descriptions of other structures, functions and effects are omitted, but the descriptions of the first to fifth embodiments can be applied to the sixth embodiment.

[0096] (Seventh Implementation)

[0097] In the fifth embodiment, the snow generated in the tank 14a is allowed to fall naturally and be drawn into the container 16a. In contrast, in the seventh embodiment, as... Figure 11 As shown, the snow generated in tank 14a is introduced into container 16a below nozzle 14b through second circulation path 68.

[0098] Specifically, in the seventh embodiment, the connecting path 64 is omitted, and a second circulation path 68, independently formed from the circulation path 16b, is provided. One end of the second circulation path 68 is connected to the top of the hollow body 63 (canister 14a), and the other end is connected to the portion below the nozzle 14b in the hollow body 63. A blower 69 is disposed in the second circulation path 68. When the blower 69 is operating, the air accompanying the snow generated in the canister 14a is guided through the second circulation path 68 to the lower part of the nozzle 14b in the hollow body 63. The cooler 65 is disposed in the second circulation path 68, not the circulation path 16b. In the upper part of the hollow body 63, an upward airflow can be formed, so small snowflakes move from below the nozzle 14b toward above the nozzle 14b. Accordingly, small snowflakes grow. On the other hand, large snowflakes fall naturally below the nozzle 14b in the hollow body 63 regardless of the airflow. The inlet 16c of container 16a is formed in the hollow body 63 at the lower side of the blow-out side end of the second circulation path 68 and the upper side of the blow-out side end of circulation path 16b.

[0099] Air flows downwards in the lower part of the hollow body 63, that is, below the connection of the circulation path 16b in the side of the container 16a.

[0100] In addition, the descriptions of other structures, functions and effects are omitted, but the descriptions of the first to sixth embodiments can be applied to the seventh embodiment.

[0101] (Eighth Implementation Method)

[0102] The eighth embodiment is an artificial weather chamber 50 equipped with the snowmaking device 10 described in the first embodiment. The snowmaking device 10 of the first embodiment is not limited to being installed in the artificial weather chamber 50; for example, it can also be used for snowfall both indoors and outdoors. In contrast, in the eighth embodiment, the snowmaking device 10 is used for snowfall in the artificial weather chamber 50.

[0103] like Figure 12 As shown, the artificial weather chamber 50 according to the eighth embodiment includes a snowmaking device 10 and a test chamber 52. Furthermore, details will be described below, but the same reference numerals will be used for the same components as in the first embodiment, and detailed descriptions will be omitted.

[0104] The test chamber 52 is configured to accommodate a sample (not shown) and to allow snowfall. The temperature inside the test chamber 52 is adjusted, for example, to around -20°C or around 5°C via an air conditioning unit (not shown).

[0105] The snowmaking device 10 includes an ice crystal generating unit 12, a snowmaking unit 14, a snow storage unit 16, a regulating unit 18, and a snowfall unit 20. A humidifier 13 that generates fine water droplets is connected to the ice crystal generating unit 12. The humidifier 13 is located outside the test chamber 52. On the other hand, the ice crystal generating unit 12, the snowmaking unit 14, the snow storage unit 16, the regulating unit 18, and the snowfall unit 20 are located inside the test chamber 52. The shell 12a of the ice crystal generating unit 12, the tank 14a of the snowmaking unit 14, the container 16a of the snow storage unit 16, the circulation path 16b, and the snowmaking circulation path 22 may or may not be covered by heat insulation. Equipment that is not suitable for placement in extremely low temperature environments, such as the motor 54 that drives the blower 16d installed in the circulation path 16b and the motor 55 that drives the blower 22c installed in the return path 22b, are located outside the test chamber 52.

[0106] Alternatively, the ice crystal generation unit 12, snowmaking unit 14, snow storage unit 16, and regulating unit 18 may not be located within the test chamber 52. For example... Figure 13 As shown, the ice crystal generating unit 12, snow making unit 14, snow storage unit 16, and regulating unit 18 can also be arranged outside the test chamber 52. In this case, the ice crystal generating unit 12, snow making unit 14, snow storage unit 16, and regulating unit 18 are covered by the heat insulation member 58. On the other hand, the snow outlet 20a of the snowfall unit 20 is arranged inside the test chamber 52. In this structure, it is not necessary to lower the temperature inside the test chamber 52 to a low temperature that does not affect snow making and snow storage; snowfall tests can be conducted by adjusting the temperature inside the test chamber 52 to a temperature suitable for the environment required for the test of the sample. Therefore, the temperature inside the test chamber 52 can have a degree of freedom.

[0107] In addition, the descriptions of other structures, functions and effects are omitted, but the descriptions of the first to seventh embodiments can be applied to the eighth embodiment.

[0108] The embodiments disclosed herein are illustrative at all points and should not be considered as limiting. The present invention is not limited to the described embodiments, and various modifications and improvements can be made without departing from its spirit. For example, in the described embodiment, a structure is adopted that includes an adjustment unit 18 for adjusting the amount of snow supplied to the snowfall section 20, but the adjustment unit 18 may be omitted. That is, a structure can be adopted that supplies a constant amount of snow instead of adjusting the amount of snow supplied to the snowfall section 20. In this case, a structure can also be adopted in which an on / off valve (or airlock) is provided in the supply path 28, the on / off valve is closed when snow is stored in the snow storage section 16, and the on / off valve is opened when snow is supplied to the snowfall section 20. The adjustment unit 18 is not limited to a structure having a first airlock 18a and a second airlock 18b. For example, the adjustment unit 18 may also be composed of a single valve such as a three-way valve.

[0109] In the described embodiment, the adjusting part 18 is configured with a first airlock 18a and a second airlock 18b. However, alternatively, the adjusting part 18 may also be configured to have, for example, a... Figure 1 The device has a structure comprising a first blower located at the position of the first airlock 18a and a second blower located at the position of the second airlock 18b. The first blower is driven when the snow-accompanying air is circulated in the snow storage section 16, and the second blower is driven when the snow-accompanying air is delivered from the snow storage section 16 to the snowfall section 20 through the supply path 28.

[0110] In the described embodiment, the snowmaking circulation path 22 has a structure with an inlet path 22a and a return path 22b, but it is not limited to this. For example, the return path 22b can be omitted if it is possible to supply only snow flakes of a specified quality or higher, or if it is possible to allow snow mixed with snow flakes of a lower quality to fall from the snowfall section. In this case, the cooler 26 is not located on the return path 22b, but is located on the air piping that supplies low-temperature air to the snowmaking section 14.

[0111] Here, the implementation method is described in summary.

[0112] (1) The snow-falling device involved in the embodiment includes: a snow storage section having an inlet for storing snow introduced through the inlet in a non-freezing state; and a snowfall section for introducing snow stored in the snow storage section and causing the introduced snow to fall or be supplied to the sample body.

[0113] In the described embodiment, a structure is employed in which snow stored in the snow storage section is used to fall or be supplied to the sample body via the snowfall section. That is, for example, when snow generated by a snowmaking device is introduced into the snow storage section, the amount of snow introduced from the snow storage section to the snowfall section per unit time can exceed the snowmaking capacity of the snowmaking device per unit time. Furthermore, the total amount of snow that falls or is supplied to the sample body by the snowfall section within a specified time can be stored in the snow storage section. Therefore, unlike structures that simultaneously produce snow and then fall it sequentially, the amount of snowfall or snow supply is not limited by the snowmaking capacity. Thus, in this snowfall device, the amount of snowfall or snow supply can be obtained without being limited by the snowmaking capacity. Moreover, since the snow is kept in a non-freezing state in the snow storage section, snowfall can occur from the snowfall section simply by introducing the snow stored in the snow storage section. Furthermore, since the snow storage section only needs to keep the snow in a non-freezing state, it does not need to have a function to promote snow growth or generate snow. In the snow storage area, although the goal is to retain snow in a way that prevents it from freezing, this does not mean that all the snow is completely free of freezing. It is desirable to maintain the snow in a state of non-freezing, but sometimes the snow freezes locally. In short, the goal is to maintain the snow in the snow storage area in a state that can supply snowfall to the snowfall area.

[0114] (2) The snowfall device may also include an adjustment unit for adjusting the amount of snow supplied from the snow storage unit to the snowfall unit. In this configuration, the amount of snowfall in the snowfall unit can be changed. Therefore, the amount of snowfall can be varied.

[0115] (3) In the snowmaking device, the snow storage section may also have a mechanism for keeping the snow in the snow storage section in a non-freezing state. In this structure, the snow stored in the snow storage section is less likely to freeze. Therefore, the time for which the snow is kept in a non-freezing state can be extended. That is, the snow storage section is provided with a mechanism for not only temporarily preventing the snow stored in the snow storage section from freezing, but also maintaining the snow in a non-freezing state. Accordingly, the snow can be kept in a non-freezing state for a long time. In the snow storage section, although the snow is kept in a way that prevents the snow from freezing, it does not mean that all the snow is completely non-freezing. It is possible to maintain the snow in a non-freezing state through the mechanism, but sometimes the snow freezes locally. In short, the mechanism for keeping the snow in a non-freezing state only needs to keep the snow in the snow storage section in a state where it can be supplied to the snowfall section.

[0116] (4) In the snowmaking device, the snow storage section may also have a structure that circulates the air accompanying the snow. In this structure, the air circulates with the snow within the snow storage section. Therefore, the snow is stored in the snow storage section in a constantly moving manner. As a result, the snow can be kept in a non-freezing state for a long time within the snow storage section.

[0117] (5) In the snowmaking device, the snow storage unit may also include a container and a circulation path connected to the container at both ends and equipped with blowers. The structure allows snow in the container to be transported by air, flow through the circulation path, and then return to the container. In this structure, air flows through the circulation path due to the operation of the blowers. Accordingly, snow in the container is transported by air and flows through the circulation path. The air accompanying the snow flowing through the circulation path returns to the container. Thus, since the air accompanying the snow circulates through the circulation path, the snow can be kept from freezing. Furthermore, compared to a structure where the air accompanying the snow is circulated only within the container, the size of the container can be reduced.

[0118] (6) In the snowmaking device, the snow storage unit may also have a container and a circulation path connected to the container at both ends and equipped with blowers. The structure is such that the snow in the container is transported by air and flows through the circulation path, and then returns to the container. The regulating unit adjusts the amount of air introduced into the snowfall unit in the air accompanying the snow flowing through the circulation path.

[0119] In this structure, air flows through a circulation path due to the operation of a blower. Snow inside the container is thus transported by air and flows through the circulation path. The air accompanying the snow flowing through the circulation path returns to the container. Therefore, the air accompanying the snow circulates through the circulation path. An adjustment unit adjusts the flow ratio from the circulation path so that at least a portion of the air accompanying the snow flowing through the circulation path is introduced into the snowfall section. In other words, by adjusting the ratio of snow circulating through the circulation path to snow introduced into the snowfall section, the amount of snow delivered to the snowfall section can be adjusted.

[0120] (7) In the snowmaking device, the snowfall section can also spray water in a mist onto the snow to make the snow have the desired moisture content. In this structure, snow with the desired snow quality can be produced. Furthermore, the snow quality can be changed if the moisture content can be changed.

[0121] (8) The snowmaking device may also include a snowmaking section for producing snow. In this case, the snow storage section may also receive snow produced by the snowmaking section through the inlet. In this structure, it is not necessary to move snow stored in the snow storage section from outside the snowmaking device. The amount of snow introduced from the snow storage section to the snowmaking section per unit time may also exceed the snowmaking capacity of the snowmaking section per unit time. Therefore, it is possible to produce or supply a quantity of snow exceeding the snowmaking capacity of the snowmaking section to the sample body.

[0122] (9) The snowmaking device may also include a snowmaking circulation path, which circulates the air accompanying the snow between the snowmaking section and the snow storage section. In this structure, even if incompletely grown snow is introduced from the snowmaking section to the snow storage section, the snow can be grown by returning the incompletely grown snow to the snowmaking section.

[0123] (10) The snowmaking unit may also have nozzles that spray water in a mist, and use ice crystals generated by cooled air and water sprayed in a mist from the nozzles to make snow. In this structure, since snow is made using ice crystals generated by cooled air and water sprayed in a mist from the nozzles in the snowmaking unit, snow can easily grow. Therefore, snow can be made even without lowering the temperature inside the snowmaking unit to extremely low temperatures such as -40°C.

[0124] (11) The snowmaking device may also include: a vibration unit that vibrates the snowmaking unit or the snowmaking circulation path. In this structure, it is possible to suppress snow from adhering to the snowmaking unit or the snowmaking circulation path.

[0125] (12) The artificial weather chamber involved in the embodiment includes: the snowmaking device; and a test chamber having a space for arranging a sample body, wherein the snowmaking device makes snowfall or supplies snow to the sample body in the test chamber.

[0126] (13) The snowfall method involved in the embodiment includes the following steps: introducing snow into the snow storage unit through the inlet of the snow storage unit; keeping the snow in a non-freezing state and storing it in the snow storage unit; introducing the snow in the snow storage unit into the snowfall unit; and snowfalling or supplying the sample body through the snowfall unit.

[0127] As explained above, it is possible to obtain snowfall or snow supply that is not limited by snowmaking capacity.

Claims

1. A snowmaking device, characterized in that... include: The snow storage unit includes a container with a snow inlet and a circulation path connected to the container at both ends, which keeps the snow introduced through the inlet in a non-freezing state and stores it. and, The snowfall section receives snow stored in the snow storage section and causes the received snow to fall or be supplied to the sample body, wherein... The snow storage unit includes a blower, which is located in the circulation path. The snow storage unit includes the following structure: The operation of the blower causes snow to be transported within the container along with air, primarily from top to bottom, and snow flowing out of the container into the circulation path is returned to the container.

2. The snowmaking device according to claim 1, characterized in that... Also includes: The regulating unit adjusts the amount of snow supplied from the snow storage unit to the snowfall unit.

3. The snowmaking device according to claim 1, characterized in that... Also includes: A supply path is connected to the circulation path and to the snowfall unit, wherein... The snow storage unit, when the snow is not transported to the snowfall unit through the supply path, or when the airflow accompanying the snow is adjusted while being transported to the snowfall unit through the supply path, uses the blower to circulate the snow in the growing container, keeping the snow in a non-freezing state and storing it.

4. The snowfall device according to claim 2, characterized in that, The regulating unit adjusts the amount of air introduced into the snowfall unit from the air flowing in the circulation path accompanied by snow.

5. The snowfall device according to claim 1, characterized in that, The snow-spraying unit sprays water in a mist onto the snow, thereby making the snow have the desired moisture content.

6. The snowmaking device according to claim 1, characterized in that... Also includes: The snowmaking department is used for snowmaking, among which... The snow storage unit introduces snow produced by the snowmaking unit through the inlet.

7. The snowmaking device according to claim 6, characterized in that... Also includes: The snowmaking circulation path circulates the air accompanying the snow between the snowmaking section and the snow storage section.

8. The snowmaking device according to claim 6, characterized in that, The snowmaking unit has nozzles that spray water in a mist and uses ice crystals generated by cooled air and water sprayed in a mist from the nozzles to make snow.

9. The snowmaking device according to claim 7, characterized in that... Also includes: The excitation unit causes the snowmaking unit or the snowmaking circulation path to vibrate.

10. A snowmaking device, characterized in that... include: The snow storage unit has an inlet for storing snow introduced through the inlet in a non-freezing state. Supply route; The snowfall section introduces snow stored in the snow storage section through the supply path, and causes the introduced snow to fall or be supplied to the sample body; and, The regulating unit adjusts the snow supply from the snow storage unit to the snowfall unit, wherein... The snow storage unit includes a container with the inlet and a blower. The snow storage unit, in a state where the snow is not transported to the snowfall unit through the supply path by the regulating unit, or in a state where the flow rate of the air accompanying the snow being transported to the snowfall unit through the supply path is adjusted by the regulating unit, uses the blower to circulate the snow in the growing container, thereby keeping the snow in a non-freezing state and storing it.

11. An artificial weather chamber, characterized in that... include: The snowmaking device according to any one of claims 1 to 10; and, The laboratory has a space for preparing test specimens, in which... The snowmaking device either produces snow in the test chamber or supplies snow to the sample.

12. A snowfall method, comprising using the snowfall device according to any one of claims 1 to 10, characterized in that... Includes the following steps: Snow is introduced into the snow storage unit through the inlet of the snow storage unit; The snow is kept in a non-freezing state and stored in the snow storage section; The snow in the snow storage section is directed into the snowfall section; and... The snowfall section is used to cause snowfall or to supply snow to the sample.

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