JP6409921B2 - Ice making method and environmental test method - Google Patents

Description

  The present invention relates to an ice making method and an environmental test method, and more particularly, in the case of transporting and using ice particles obtained by crushed ice pieces, the amount of ice making per unit time is hindered in the ice breaking stage and the carrying stage. Ice making method capable of making ice pieces of desired ice temperature and / or desired ice thickness efficiently and smoothly, and the required ice quality per unit time is required while ensuring the desired ice quality The present invention relates to an environmental test method using artificial snow capable of performing an appropriate and effective environmental test on the spot.

Conventionally, a reamer type ice making method has been used to produce ice.
The reamer-type ice making apparatus includes a substantially cylindrical ice making cylinder having an ice making surface on the inner peripheral surface or outer peripheral surface, and a water sprinkling unit that sprinkles water that forms ice toward the inner peripheral surface or outer peripheral surface of the ice making cylinder. A storage unit that is disposed below the ice making cylinder and receives and stores the water that has flown without being frozen by the ice making cylinder, and breaks the ice while moving along the inner or outer peripheral surface of the ice making cylinder A reamer, the reamer has a plurality of blades for splitting ice with a cutting edge spirally arranged around a substantially cylindrical rotation shaft, and revolves around the rotation axis of the reamer ice making cylinder and / or The thin ice layer formed on the ice making surface can be peeled off by rotation about the rotation axis.

The method using such a reamer type ice making device is based on the temperature of the feed water used for forming ice by freezing, the evaporation temperature of the refrigerant used for freezing the feed water, and the inner circumference of the ice layer formed in an annular shape. In this method, a flake-shaped ice piece is made by adjusting the number of revolutions of a reamer that peels off the flake-shaped ice piece by biting a blade that can rotate concentrically with the ice layer.
Ice pieces, which are flaked ice pieces that have been made into ice, have usually been used after being crushed using, for example, an ice crusher to form ice particles of a predetermined particle size.
For example, an environmental test room is conventionally used for placing a complete model vehicle indoors, setting various natural environments and weather conditions, and collecting and analyzing loads on the vehicle as data.
As an example, we simulate snowstorms with artificial snow in an environmental test room, blow out the snowstorms toward the vehicle, and deal with problems such as problems caused by snow in the engine room and icing problems such as freezing of suspension parts. Things have been done.

For this reason, an environmental test room has a wind tunnel of a space enough for a vehicle to be arranged and blowing a snowstorm toward the vehicle, and a snowstorm generating device.
The snowstorm generator is simulated by an ice making machine that produces flaky ice pieces, an ice breaker that breaks the produced flaky ice pieces into ice particles of a predetermined particle size, and ice particles of a predetermined particle size that are crushed ice A pipe that conveys the artificial snow into the wind tunnel, and a blowing nozzle that is installed at the tip of the pipe and blows out toward the front of the vehicle.
According to such an environmental test room, it is possible to perform an environmental test simulating natural environment and weather conditions by blowing a snowstorm toward a vehicle in a wind tunnel using a snowstorm generator.

At this time, in order to perform an appropriate and effective environmental test, it is necessary to simulate a snowstorm in a natural state. In particular, from the viewpoint of reproducing the adhesion of the snowstorm to a vehicle, the temperature and particle size of the snow constituting the snowstorm Furthermore, it is important to secure the amount of snow necessary for the test.
In this case, in the conventional reamer-type ice making method, focusing on only the ice making amount per unit time, the refrigerant evaporation temperature, the reamer rotation speed, and the feed water temperature were appropriately adjusted. There are technical problems such as
That is, since attention was not paid to the ice temperature or ice quality of the ice pieces produced, technical obstacles may occur in breaking the ice pieces into ice particles.

More specifically, in the conventional reamer type ice making method, if the amount of ice making per unit time is increased, the evaporation temperature of the refrigerant is decreased, the reamer rotation speed is increased, and the feed water temperature is decreased. Depending on the combination of these three control parameter values, the ice quality of the ice made, for example, the ice thickness or the water content varies in various ways.
In this case, if the ice thickness of the ice pieces exceeds a certain limit, it will be difficult to crush the ice pieces in the ice breaker, resulting in a forced stop of the ice breaker, or the short life of the pair of crushing drums in the ice breaker. Cause
In addition, if the water content of ice pieces that have been iced exceeds a certain limit, it is unlikely that it will be difficult to crush the ice pieces in the ice crusher. However, even if the transport path is blocked or not blocked, the ice particles adhere to each other and cause the ice particles to have a large diameter and thus to change the quality of the ice.
Such technical problems are not limited to the reamer type ice making method by physical separation, but by cooling the feed water with a refrigerant, a thin ice layer is formed on the ice making surface, which is then removed from the ice making surface. As long as it is deiced to produce ice pieces, it is a common problem.

In view of the above technical problems, the object of the present invention is to cause troubles in the ice breaking stage and the conveying stage with respect to the ice making amount per unit time when the ice pieces obtained by breaking the ice pieces made into ice are conveyed and used. An object of the present invention is to provide an ice making method capable of efficiently and smoothly making ice pieces having a desired ice temperature and / or desired ice thickness.
In view of the above technical problems, the object of the present invention is to perform a proper and effective environmental test on the spot when necessary ice making amount is required while ensuring desired ice quality. Is to provide an environmental test method using artificial snow.

In order to achieve the above object, the ice making method of the present invention comprises:
In the ice making method of making ice by cooling the feed water flowing on the ice making surface with a refrigerant to form ice, and deicing the ice formed on the ice making surface,
Presetting the required ice making volume and the required ice piece temperature per unit time;
Based on the required ice making amount per unit time and the required ice piece temperature, the step of adjusting the ice formation speed on the ice making surface and the deicing speed of the formed ice from the ice making surface is configured.
Further, the step of deicing the ice formed on the ice making surface is performed by mechanically peeling the ice formed on the ice making surface,
The step of adjusting the deicing speed of the ice from the ice making surface may be adjusting the mechanical peeling speed of the ice.
Furthermore, the deicing step is performed by heating the ice formed on the ice making surface from the inside of the ice making surface,
The step of adjusting the deicing speed of the ice from the ice making surface may be an interval adjustment of the ice heating time.
Furthermore, adjusting the temperature of the water supply used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the water supply, and the peeling speed at which the ice pieces are peeled off from the circumferential surface of the ice layer formed in an annular shape In the ice making method of making ice pieces by
Presetting the maximum thickness of the ice layer formed before peeling the ice pieces, and the ice temperature of the ice pieces to be made;
According to the maximum thickness of the ice layer and the ice temperature that is set, the refrigerant evaporation temperature is kept constant, the ice making amount per unit time is increased, and the water supply temperature is lowered while the peeling speed is increased. But you can.
In addition, the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the peeling speed for peeling the ice pieces from the circumferential surface of the ice layer formed in an annular shape are adjusted. In the ice making method of making ice pieces by
Pre-setting the thickness of the ice layer formed before peeling the ice pieces;
A configuration may be provided that includes a step of increasing the peeling rate while lowering the water supply temperature while lowering the coolant evaporation temperature as well as increasing the ice making amount per unit time so that the thickness of the ice layer becomes constant.

In order to achieve the above object, the reamer type ice making method of the present invention comprises:
A blade that can revolve concentrically with the ice layer with respect to the temperature of the water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the water, and the circumferential surface of the ice layer formed in an annular shape In the reamer-type ice making method of making flaky ice pieces by adjusting the number of revolutions of the reamer that bites the flake-like ice pieces,
Presetting the maximum thickness of the ice layer formed before the flake ice pieces are peeled off by the reamer, and the ice temperature of the ice flakes to be made;
Depending on the maximum ice layer thickness and ice temperature set, the refrigerant evaporation temperature is kept constant, while the ice making volume per unit time increases and the feed water temperature decreases while the reamer rotation speed is increased and the peeling speed is increased. It is set as the structure which has the step to do.

According to the reamer type ice making method having the above configuration, after presetting the maximum thickness of the ice layer formed before breaking into flaky ice pieces by the reamer and the ice temperature of the flaky ice pieces to be iced, According to the set maximum ice layer thickness and ice temperature, the refrigerant evaporating temperature is kept constant, the ice making amount per unit time is increased, and the reamer rotation speed is increased while the feed water temperature is decreased. Therefore, when transporting and using ice particles obtained by crushed ice pieces, the flake-like ice pieces are iced by limiting the thickness of the ice pieces to a certain limit as long as the necessary ice making amount can be secured. During the ice breaking step, the ice breakage is not disturbed, and the ice temperature of the flake-like ice pieces is adjusted to adjust the ice temperature of the flake ice pieces. With As a result, the flake-shaped ice pieces having a desired ice temperature and / or desired ice thickness can be efficiently and smoothly produced without blocking the conveyance path or causing the diameter of the ice particles to increase due to adhesion between the ice particles. Ice making is possible.

In addition, it is preferable to have a step of linearly increasing the peeling speed while linearly decreasing the feed water temperature as the ice making amount per unit time increases.

In order to achieve the above object, the reamer type ice making method of the present invention comprises:
A blade that can revolve concentrically with the ice layer with respect to the temperature of the water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the water, and the circumferential surface of the ice layer formed in an annular shape In the reamer-type ice making method of making flaky ice pieces by adjusting the number of revolutions of the reamer that bites the flake-like ice pieces,
Pre-setting the thickness of the ice layer formed before the flake ice pieces are peeled off by the reamer;
In order to keep the thickness of the ice layer constant, there is a step of increasing the reaming speed by increasing the reamer rotation speed while lowering the water supply temperature while lowering the refrigerant evaporation temperature as well as the amount of ice making per unit time. It is configured.

In addition, the ice layer relative to the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the circumferential surface of the ice layer formed annularly on the outer circumferential surface of the rotating drum In the ice making method of making flaky ice pieces by adjusting the number of revolutions of the rotating drum that causes the fixed blade to bite in from the outside and peel the flaky ice pieces,
Presetting the maximum thickness of the ice layer formed before peeling the flaky ice pieces, and the ice temperature of the flaky ice pieces to be iced,
Depending on the maximum ice layer thickness and ice temperature, the refrigerant evaporating temperature is kept constant, the ice production per unit time is increased, the feed water temperature is lowered and the rotating drum rotation speed is increased and the peeling speed is increased. It may be a configuration having a step of increasing.

Further, the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the circumference of the ice layer formed annularly on the outer circumference of the rotating drum In the ice making method of making flaky ice pieces by adjusting the revolution speed of the blade to rip off the flaky ice pieces by biting in a blade that can revolve concentrically with the outside,
Presetting the maximum thickness of the ice layer formed before peeling the flaky ice pieces, and the ice temperature of the flaky ice pieces to be iced,
Depending on the set maximum ice layer thickness and ice temperature, while keeping the refrigerant evaporation temperature constant, while increasing the ice making volume per unit time and lowering the feed water temperature, the blade revolution speed is increased and the peeling speed is increased. A configuration having increasing stages may be used.

Furthermore, with respect to the temperature of the water supply used for forming ice by freezing, the evaporation temperature of the refrigerant used for freezing the water supply, and the peripheral surface of the ice layer formed in an annular shape on the inner peripheral surface of the rotating drum, In an ice making method for making ice flakes by adjusting the revolution speed of the blade to peel off the flake ice pieces by biting the blade that can revolve concentrically with the ice layer from the inside,
Presetting the maximum thickness of the ice layer formed before peeling the flaky ice pieces, and the ice temperature of the flaky ice pieces to be iced,
Depending on the set maximum ice layer thickness and ice temperature, while keeping the refrigerant evaporation temperature constant, while increasing the ice making volume per unit time and lowering the feed water temperature, the blade revolution speed is increased and the peeling speed is increased. A configuration having increasing stages may be used.

In addition, it is preferable to have a step of linearly increasing the peeling rate while linearly decreasing the feed water temperature while linearly decreasing the refrigerant evaporation temperature as the ice making amount per unit time increases.

In addition, when conducting a snow test simulating natural snow, the thickness of the ice layer and / or the ice temperature of the ice pieces to be made are set in advance according to the ice making amount and / or ice quality per unit time required for the snow test. It is good to do.
Furthermore, by cooling the inner peripheral surface or the outer peripheral surface with the refrigerant from the outer peripheral surface or inner peripheral surface of the ice making cylinder, the water supplied to the inner peripheral surface or outer peripheral surface of the ice making cylinder is frozen to form an ice layer Before starting the on-snow test, it is preferable to sufficiently cool the inner peripheral surface or the outer peripheral surface of the ice making cylinder using a refrigerant so that the water supply is frozen.

In order to achieve the above object, the reamer type ice making method of the present invention comprises:
A substantially cylindrical ice making cylinder having an inner or outer peripheral surface as an ice making surface, a sprinkler for supplying water that forms ice toward the inner or outer peripheral surface of the ice making cylinder, and an inner periphery of the ice making cylinder A reamer that breaks ice while moving along a surface or an outer peripheral surface, the reamer has a plurality of blades for breaking ice, the cutting edge of which is arranged in a spiral manner around a substantially columnar rotation shaft, By making a trial run of a reamer-type ice making device that can remove the thin ice layer formed on the ice making surface by revolving around the rotation axis of the reamer's ice making cylinder and / or rotating around the turning axis, ice making per unit time Preliminarily linearly approximating the relationship between the volume and the water supply temperature, the relationship between the ice making amount per unit time and the revolution of the reamer and / or the rotation speed and the relationship between the ice making amount per unit time and the ice thickness;
Determining the feed water temperature, reamer rotation speed and ice thickness for a given amount of ice making per unit time;
The stage of making ice by reamer type ice making according to the calculated water supply temperature and reamer rotation speed,
Crushing ice pieces that have been made into ice.

In addition, the ice layer relative to the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the circumferential surface of the ice layer formed annularly on the outer circumferential surface of the rotating drum In the ice making method of making flaky ice pieces by adjusting the number of revolutions of the rotating drum that causes the fixed blade to bite in from the outside and peel the flaky ice pieces, it is formed before peeling the flaky ice pieces. The stage of presetting the thickness of the ice layer and the rotation of the rotating drum while lowering the water supply temperature while lowering the refrigerant evaporation temperature and lowering the coolant evaporation temperature as the ice layer thickness increases so that the ice layer thickness becomes constant A configuration may be provided that includes increasing the number and increasing the peel rate.

Further, the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the circumference of the ice layer formed annularly on the outer circumference of the rotating drum In the ice making method of making flake ice pieces by adjusting the revolving speed of the blade to bite the flake ice pieces concentrically with the blade that can revolve from the outside, before peeling the flake ice pieces Pre-set the thickness of the ice layer formed in the The configuration may include a step of increasing the revolution speed of the blade and increasing the peeling speed.

Furthermore, with respect to the temperature of the water supply used for forming ice by freezing, the evaporation temperature of the refrigerant used for freezing the water supply, and the peripheral surface of the ice layer formed in an annular shape on the inner peripheral surface of the rotating drum, A flake-like ice piece is peeled off in an ice making method in which flake-like ice pieces are made by adjusting the revolving speed of the blade to bite the flake-like ice pieces by biting a blade that can revolve concentrically with the ice layer from the inside. A step of presetting the thickness of the ice layer formed prior to starting, and reducing the water supply temperature while lowering the refrigerant evaporation temperature and increasing the ice making amount per unit time so that the ice layer thickness is constant. However, the configuration may include a step of increasing the revolution speed of the blade and increasing the peeling speed.

In order to achieve the above-mentioned problem, a method for conducting an environmental test using the artificial snow of the present invention,
In the method of conducting environmental tests using artificial snow,
Depending on the total required amount of artificial snow used for the environmental test, an arbitrary number of ice makers that produce ice pieces is selected, and each selected ice machine is made before the start of the environmental test. Ready to be ready,
Adjusting the ice making amount per unit time according to the change in the required amount of artificial snow used for environmental testing by making ice with the prepared ice making machine,
Crushing cracked ice pieces made by the selected ice making machine into ice particles,
Transporting ice-shaped artificial snow through a transport pipe by compressed air, and
In the ice making machine, the preparation step to the ice making ready state includes a step of forming a thin ice layer on the thin ice forming surface of the ice making machine at the time of starting the environmental test,
The ice making stage by the prepared ice making machine is the ice making method according to any one of claims 1 to 12.

Further, the transporting step preferably includes a step of simulating snow blowing by spraying ice-shaped artificial snow from the end opening of the transport pipe.
Further, the ice making stage by the prepared ice making machine includes a step of roughly adjusting the ice making amount per unit time according to a change in the required amount of artificial snow used for the environmental test by making ice by the prepared ice making machine, Fine-tuning the ice making amount per unit time on the selected ice machine according to the difference between the required amount of artificial snow and the coarsely adjusted ice making amount per unit time in response to changes in the required amount of artificial snow used in the test It is good to have a step to do.

Hereinafter, a first embodiment of the reamer type ice making method of the present invention will be described in detail with reference to the drawings, taking as an example the case where ice made is used for an environmental test.
First, the snow environment test system will be described. As shown in FIG. 1, the snow environment test system 10 uses artificial snow composed of ice particles and simulates a snowstorm by placing the artificial snow on an airflow from behind. Thus, it is configured to spray toward the vehicle V, which is a test specimen, and for that purpose, it has a snowstorm supply system 12 and an airflow supply system 14.
In particular, when continuously blowing toward the vehicle V using the required amount of snowstorm with a predetermined snow quality, where the particle size and moisture content of ice particles are the main influencing factors, the entire height of the vehicle V In order to achieve a desired snowstorm concentration distribution in the height direction of the vehicle V in some cases, a group of ice particles used as artificial snow is manufactured immediately before the test under a predetermined temperature and humidity control. And prompt supply is required.

More specifically, the snow environment test system 10 includes a wind tunnel 16 in which the vehicle V to be tested is disposed, a low temperature chamber 18 disposed above the wind tunnel 16, and an ice making chamber disposed above the low temperature chamber 18. 20, an ice making machine 22 is arranged in the ice making chamber 20, and an ice temperature stabilizing conveyor 24, an ice breaker 26, a blower 28, a cooler 30, and artificial snow distribution are arranged in the low temperature chamber 18. A device 34 is disposed, and a wet snow device 32, an artificial snow blowing nozzle 36, and a snow collecting device 38 are disposed in the wind tunnel 16. In general, ice pieces made in the ice making chamber 20 are cooled at low temperature. Artificial snow is manufactured by crushed ice in the chamber 18 and pulverizing into ice, and the artificial snow is pumped toward the wind tunnel 16 to distribute wet artificial snow into the low temperature air current in the wind tunnel 16. It is configured to be put on snowstorm and sprayed toward vehicle V To have.

The wind tunnel 16 is an open type circulation type, and a measurement chamber 300 in which a vehicle to be measured is installed (open type), and first to fourth bent cylinders 302, 304, 306, 308 (bent portions). Are formed in a substantially rectangular shape in plan view. The airflow generated by the blower 25 passes through the second diffusion cylinder 310, the third bending cylinder 306, the fourth bending cylinder 308, the rectifying cylinder 312 (see FIG. 1), and the contracted flow cylinder 314 (see FIG. 1), and then the measurement chamber 300. The air flows into the measurement chamber 300 from the blowout port 316 (see FIG. 1), and flows in the order of the first bending cylinder 302 and the second bending cylinder 304.
The airflow blown by the blower 25 is measured by once reducing the wind speed (dynamic pressure) of the entire airflow and increasing the pressure (static pressure) in the intermediate body portion, and then passing through the contracted flow drum 314. Therefore, an air flow having a necessary and sufficient air volume (wind speed) can be blown out from the blow-out port 316 to the measurement chamber 300.

As a result, as will be described later, the ice particles that are conveyed by air through the ice making process, the ice breaking process, the separation process, and the wet snow process are blown into the measurement chamber 300 by riding on the airflow from the back toward the vehicle. By adjusting the wind speed of the airflow with the blower 25, the traveling vehicle can be simulated while being a stationary vehicle.
Further, in the case of the circulating wind tunnel 16 for a snowstorm test, a snow repair device 38 is separately provided downstream of the vehicle V in order to separate and collect the snow after the test. In order to separate snow by the inertia effect, an area where the airflow is not rectified is provided downstream of the vehicle V.

The snow blowing supply system 12 is provided in three systems. In each system, a snow supply pipe 40 that connects the ice breaker 26 and the blowing nozzle 36 and an air duct 44 that connects the suction port 42 in the wind tunnel 16 and the ice breaker 26 are provided. In the snow supply pipe 40, an artificial snow distribution device 34 and a wet snow device 32 are connected in this order between the ice breaker 26 and the blowing nozzle 36, while the air duct 44 has an inside of the wind tunnel 16. A blower 28 and a cooler 30 are connected between the suction port 42 and the ice breaker 26.
The artificial snow distribution device 34 is installed on the upstream side of the wet snow device 32. If the artificial snow distribution device 34 is installed on the downstream side, the wet snow is sent to the distribution device 34, and the inside of the distribution device 34 This is to prevent clogging due to adhesion.

In each system, the reamer-type ice maker 22 is a so-called reamer-type reamer-type ice maker 22 that produces flaky ice pieces. Depending on the total amount of artificial snow used in the snow environment test, the flaky ice pieces By selecting an arbitrary number from a plurality of reamer-type ice makers 22 that produce the ice, and making ice with the selected reamer-type ice maker 22 in accordance with a change in the required amount of artificial snow used for the environmental test, unit time The reamer formula is selected according to the difference between the required amount of artificial snow and the roughly adjusted amount of ice per unit time for the change in the required amount of artificial snow used for environmental testing. Each ice making machine 22 has a control device (not shown) for finely adjusting the ice making amount per unit time by adjusting the evaporation temperature and / or the water temperature and / or the reamer rotation speed. The control device preferably has, as a database, for example, a table of the required number of ice makers for the total required amount of artificial snow used for the environmental test and a change table of the required amount of artificial snow used for the environmental test.
In the reamer-type ice making machine 22, as in the past, if ice is made in advance before the test and ice is crushed into ice particles and stored, the ice quality changes over time, and an accurate test is performed. However, even if the reamer type ice making machine 22 makes the flaky ice pieces with the reamer, the flaky ice pieces stick to each other. Since it is cumbersome to separate the attached ice pieces, preparation for ice making is completed at the time of the test, and it is necessary to have a function that can make ice quickly and continuously during the test. .

For this purpose, when cooling the circulating water, which is an ice material, with the refrigerant, tap water is usually used. By circulating the circulating water at the start of the test, for example, tap water at about 15 ° C. The water is stabilized to 0 ° C to several ° C, and the ice is continuously made while adjusting the peeling cycle according to the reamer rotation speed. ing.
The temperature of water, which is an ice material, can be adjusted by a conventionally known method.

  More specifically, as shown in FIG. 2, the reamer type ice making machine 22 is a conventionally known type, but a substantially cylindrical ice making cylinder 102 having an inner peripheral surface as an ice making surface, Water is sprayed and supplied to the peripheral surface, and a water sprinkling unit that forms ice and a storage unit that is disposed below the ice making cylinder 102 and receives and stores the water that has flown without freezing in the ice making cylinder 102. And a reamer 108 that breaks ice while moving along the inner peripheral surface of the ice making cylinder 102.

  The ice making cylinder 102 is a double-structured substantially cylindrical body having an inner wall excellent in heat transfer and an outer wall that is insulative with respect to the outside, and a refrigerant channel 110 for ice making is built in between the inner wall and the outer wall. The inner peripheral surface of the inner wall that is cooled by the action of the refrigerant is the ice making surface. In the ice making cylinder 102, water sprayed on the cooled inner peripheral surface adheres and freezes, so that, for example, thin ice having a thickness of about 2 mm can be generated.

  The refrigerant introduced into the refrigerant flow path 110 of the ice making cylinder 102 is a known medium used in a general refrigeration cycle, and detailed description thereof is omitted. It should be noted that the evaporation temperature of the refrigerant can be adjusted by a conventionally known method such as an evaporation pressure adjusting valve (not shown).

  The reamer 108 is formed by integrally attaching a plurality of ice-breaking blades 112 whose blade tips are arranged in a spiral manner around a substantially cylindrical rotating shaft extending in the vertical direction, and supporting a reamer that protrudes from the central shaft 111. It is supported rotatably on the part. The minimum distance between the blade 112 of the reamer 108 and the inner peripheral surface of the ice making cylinder 102 can be set to about 0.4 to 0.5 mm, which is smaller than the ice thickness, for example. As described above, the reamer 108 revolves around the center line of the ice making cylinder 102 and rotates around the central axis 111 while peeling off the thin ice layer formed on the ice making surface. Note that the rotation speed of the reamer 108 by revolving around the revolving shaft 115 by the motor 103 constitutes a flake-like ice piece peeling cycle by the reamer, and this rotation speed can be adjusted by a conventionally known method. .

  The blade shape of each blade 112 of the reamer 108 is a simple straight blade shape along a spiral curve, and the contact distance between the blade 112 and ice is adjusted by changing the number of blades 112 in the reamer 108. The size of ice can be changed from granular to massive.

  Regarding the ice making operation of the reamer type ice making machine 22, even in a situation where ice is not required in advance, the inner peripheral surface of the ice making cylinder 102 is sufficiently cooled to the extent that water is frozen by supplying the coolant to the coolant channel 110. At the same time, by sprinkling and supplying water to the ice making surface by the water sprinkling unit 104, a cylindrical thin ice layer is formed on the ice making surface. More specifically, preparation for ice making is completed at the time of performing the test, and it is possible to make ice quickly and continuously during the test. When ice is required, the movable part is rotated and water is introduced from the outside into the upper watering part 104. The water flows down along the inner peripheral surface of the ice making cylinder 102 through each hole of the sprinkler 104. Most of the water in contact with the cooled inner peripheral surface of the ice making cylinder 102 is frozen and becomes attached to the inner peripheral surface as ice. On the other hand, the remaining water that has not been frozen flows down, reaches the lower end of the ice making cylinder 102, and reaches the storage unit 106. The water temporarily stored in the storage unit 106 is returned to the watering unit 104 via a pump, piping, or the like.

  As described above, in the reamer type ice making machine 22 according to the present embodiment, the ice making cylinder 102 that is cooled and receives the supply of water to generate ice on the inner peripheral surface moves in the vicinity of the inner peripheral surface. The reamer 108 is disposed, and the reamer 108 is used to break the ice on the inner peripheral surface and peel off from the inner peripheral surface, whereby the reamer 108 for breaking the ice and the inner peripheral surface of the ice making cylinder 102 are made to be in contact with each other. Is possible.

  Next, the ice temperature stabilization conveyor 24 forcibly ventilates the flake ice pieces conveyed on the conveyor to increase the amount of heat exchange between the flake ice pieces and the air, thereby increasing the flake ice. The temperature of the piece is kept close to the ambient air temperature of the forced draft.

The ice breaker 26 mainly comprises a rotary feeder (not shown) arranged at the upper part and a pair of ice breaking drums (not shown) arranged at the lower part, and is supplied by the ice temperature stabilizing conveyor 24. The ice pieces are quantified by a rotary feeder and supplied to a pair of ice breaking drums, and the ice pieces are crushed by a pair of ice breaking drums and supplied to the snow supply pipe 40 as ice particles having a predetermined particle diameter.

The artificial snow distribution device 34 is used to distribute the artificial snow conveyed by the snow supply pipe 40 to a plurality of branch pipes (not shown). More specifically, the blowing nozzle 36 at the same level is used for the vehicle. The snow supply pipes 40 in each system are branched into a plurality of branch pipes in the width direction of the vehicle V so that a plurality of the snow supply pipes 40 are provided in the width direction of the vehicle V. A blowing nozzle 36 is provided at the tip of the nozzle.

The artificial snow distribution device 34 includes a rotating body (not shown) in which an upstream end face and a downstream end face are respectively arranged in parallel with a downstream end face of the snow supply pipe 40 and an upstream end face of each of the plurality of branch pipes; A rotation drive unit (not shown) that rotates the rotating body at a predetermined rotation speed about its axial direction, and the rotating body has a pressure feed passage (not shown) penetrating the rotating body in the axial direction inside thereof. ), And the pressure-feed passage is disposed on the upstream end face in a non-contact manner in close proximity to an outflow opening (not shown) provided on the downstream end face of the snow supply pipe 40 (not shown). And a discharge port (not shown) arranged in a non-contact manner in close proximity to an inflow opening (not shown) provided on the upstream end surface of each of the plurality of branch pipes. Equipped with a plurality of branch pipes on the passage trajectory of the discharge port by rotation of the rotating body Inlet openings respectively are provided so as to be located.

The wet snow device 32 has a hot air supply pipe (not shown) communicating with the snow supply pipe 40, and the hot air supply pipe has a predetermined length in the extending direction of the snow supply pipe 40 at the downstream end thereof. A hot air inflow portion (not shown) that forms an annular space that covers the entire outer peripheral surface of the snow supply pipe 40, and the hot air inflow opening (not shown) is provided on the outer peripheral surface of the snow supply pipe 40 that is covered by the annular space. )) Are uniformly provided, whereby an aging space (heat exchange aging region) is formed in the snow supply pipe 40 on the downstream side of the portion where the hot air inflow portion of the snow supply pipe 40 is attached. It is designed to be wet and snowy.

Regarding the airflow supply system 14, the wind tunnel 16 is formed in a part of the circulation space, and is configured to blow snowstorm over the vehicle height of the vehicle V in one direction from the front to the rear of the vehicle V. Specifically, an air flow having a predetermined wind speed is generated in one direction from the front to the rear of the vehicle V by the blower 25 installed in the circulation space, and the air flow passes through the vehicle V to a predetermined temperature by the cooler 27. It is cooled and returned to the blower 25 to generate airflow again and repeat this.

With regard to the blowing device, the three blowing nozzles 36 for blowing snow 36 are arranged at a predetermined distance in front of the vehicle V at a predetermined distance in the height direction over the vehicle height of the vehicle V. The concentration of the snowstorm to be supplied can be adjusted for each blowing nozzle 36. A snow collecting device 38 is arranged at a predetermined distance behind the vehicle V, and the snowstorm that has passed through the snow collecting device 38 is blower arranged in the low temperature chamber 18 through the suction port 42 in the wind tunnel 16. 28, cooled by the cooler 30, returned to the ice breaker 26, iced by the reamer type ice making machine 22, supplied to the ice breaker 26 by the ice temperature stabilizing conveyor 24, mixed with the ice particles to be crushed, and again It is used for blowing snow from the blowing nozzle 36 through the snow supply pipe 40. The blowout nozzle 36 is arranged along the direction of airflow, and the blowout port 102 is installed in the zone of the airflow blown from the blower 25.
In this regard, snow blowing is performed when the snow blown out from each blowing nozzle 36 by the air blown by the blower 28 is blown toward the vehicle V on the air flow blown out from the blower 25. As long as snow clogging in the tube 40 does not occur, the speed is preferably as low as possible, and the speed of snow blowing is preferably simulated by the airflow blown from the blower 25.
More specifically, when the blizzard is diffused by the diffusion plate 74 (described later) and blown toward the vehicle V, if the pumping speed of the pumped air is high, the speed of the blizzard increases only in the blizzard of the blowing nozzle 36 portion. In addition, while deviating from the natural snowstorm, it is possible to change the speed of the entire diffused snowstorm uniformly by changing the speed of the airflow blown from the blower 25. When simulating the above, it is advantageous to vary the speed of the airflow blown from the blower 25.

As shown in FIG. 1, a diffusion plate 74 is provided in front of each blowing nozzle 36, and the snowstorm blown out from the blowing nozzle 36 on the low temperature airflow from the blower toward the vehicle V is applied to the diffusion plate 74. In this case, the three snow blowing nozzles 36 cooperate with each other so that the snowstorm is distributed over the height of the vehicle V in the front portion of the vehicle V.
In this respect, since the wind tunnel 16 is not a so-called aerodynamic wind tunnel 16 but a simple wind tunnel 16, the distance between the blowing nozzle 36 and the front portion of the vehicle V is about 1 to 3 meters. The snowstorm blown out from the blowout nozzle 36 over a short distance is diffused over the entire height at the front portion of the vehicle V.
A plurality of air outlets 102 are provided at intervals in the height direction so as to cover the entire height of the vehicle V, and the amount of snow blown out from each air outlet 102 can be adjusted independently of each other. According to the height of the vehicle V, the concentration distribution of the snowstorm can be adjusted.

A facing surface 104 is provided on the side of the diffusing plate 74 facing the blowing port 102, and the facing surface 104 is disposed outside the blowing port 102 and at a predetermined position in the forward direction of the airflow. The snowstorm that blows out from the mouth 102 and travels along the airflow traveling direction along the airflow is deflected against the facing surface 104 and diffuses outward in the four directions of the facing surface 104.
The snowstorm is blown out toward a stationary vehicle disposed in the wind tunnel, and is used to perform an environmental test on the stationary vehicle. A distance D2 between the outlet 102 and the vehicle V is 1 to 3 meters, When the snowstorm arrives at the vehicle V, the airflow velocity from the rear of the air outlet 102 and the distance D2 between the air outlet 102 and the vehicle V and the airflow velocity from behind the air outlet 102 are adjusted so that the spatial density distribution of the snowstorm becomes substantially uniform. The size is determined.

  In particular, as shown in FIG. 3, the three blowing nozzles 36 are arranged at predetermined intervals in the height direction. For example, in each of the distributed wet snow, the snow blowing toward the specimen per unit time is arranged. By adjusting the amount, the lower nozzle is set so that the concentration of the blowing snow blown out becomes higher, so that if a snowstorm occurs when the vehicle in front passes over the snow on the road Since the concentration distribution of snowstorm in the height direction of the vehicle is higher as it is closer to the road, it is common to simulate this situation, or the concentration distribution of snowstorm in nature is deeper as it is closer to the ground surface Therefore, this situation can be simulated.

The operation of the snow environment test system having the above configuration, including the snow environment test method, will be described below.
The snow environment test method is to distribute the snow blowing supply system in each system while making the flake-shaped ice pieces by the reamer type ice making machine 22, the ice breaking stage to the ice grains by the ice breaker, and feeding the crushed ice grains by pressure. A distribution step of distributing by the device, a moistening step of moistening each of the distributed ice particles by the wet snow device, a step of blowing out the wetted snow particles from the blowing nozzle 36, and a snow blowing by the diffusion plate 74 On the other hand, the airflow supply system includes a step of supplying airflow by a blower to blow snowstorm blown from the blowout nozzles 36 of each system onto the airflow from the back toward the vehicle.

  In this case, first, the test schedule in the snow environment test system, especially the schedule of ice making required per unit time, the concentration distribution of snowstorm in the height direction, and the snow quality of the artificial snow (ice particle size, moisture content) In the reamer type ice making machine 22, the evaporation temperature of the refrigerant, the water temperature, and the number of revolutions of the reamer 108 are set (this will be described in detail below). The narrowest space between ice-breaking drums is set. In wet snow devices, hot air temperature, humidity, and flow rate are set according to the temperature and flow rate of the compressed air flow. In the distribution device, the rotational speed of the rotating body is set. In the diffusion plate 74, the distance from the blowing nozzle 36 is adjusted.

In particular, regarding the ice making stage of flaky ice pieces by the reamer type ice making machine 22, as shown in FIG. 4, the minimum amount and the maximum amount of ice making per unit time are clarified according to the number of operating reamer type ice making machines 22. In addition, the variable range of the ice making amount per unit time according to the number of operating units is known in advance. On the other hand, it is assumed that the ice making schedule is determined in advance in the snow environment test, and the required ice making amount per unit time increases as shown in FIG.
That is, at the beginning of the test (Phase A), the amount of ice making per unit time for operating two reamer type ice making machines 22 is sufficient, and with the progress of the test, two reamer type ice making machines 22 (phase B), reamer type ice making machine 22 Suppose that four machines (Phase C) and finally five reamer ice makers 22 (Phase D) are required.

Based on the variable range of ice making quantity per unit time according to the number of units in operation, considering the ice making schedule, five of the reamer type ice making machines 22 included in each system are selected in advance. As shown in FIG. 6, at the start of the test, a refrigerant is circulated so that ice can be made by peeling with the reamer 108, and the temperature of the water to be frozen is set to a desired temperature, and a cylindrical thin ice layer is formed. Keep it.

First, in Phase A, at the start of the test, in each system, two reamer-type ice makers 22 produce flaky ice pieces from the ice layer at the reamer 108's reamer rotation speed. In this case, since the required amount is smaller than the maximum ice making amount per unit time of the two reamer type ice making machines 22, for example, in one reamer type ice making machine 22, the reamer rotation speed constituting the peeling cycle in the reamer 108 is As a maximum, the ice making amount per unit time is made, and the other reamer type ice making machine 22 reduces the ice making amount per unit time by reducing the reamer rotation speed of the reamer 108, thereby reducing the reamer. With the coarse control based on the number of operating ice making machines 22 and the fine control based on the ice making parameters of the reamer ice making machine 22, the ice making quantity per unit time required for the test can be immediately made when necessary on the spot. .
The ice flakes that have been made into ice are crushed into ice particles by the ice crusher 26, and the ice particles are pumped by an air current through the snow supply pipe 40 and distributed to a plurality of branch pipes by the distribution device 34. In each case, the wet snow is made into wet snow by the wet snow device 32 and blown out from the blow nozzle 36 provided at the end of each branch pipe on the low-temperature air flow from behind the blow nozzle 36, and the snow blown is diffused by the diffusion plate 74 to be transmitted to the vehicle. And is used for various environmental tests. In addition, when controlling the ice making amount per unit time, a table of the required number of ice makers for the total required amount of artificial snow used for the environmental test and a change table of the required amount of artificial snow used for the environmental test are used as a database, for example. It may be created and controlled.

Next, in Phase B, it is necessary to operate two reamer type ice making machines 22, but compared to Phase A, the amount of reduction from the maximum ice making amount per unit time of two reamer type ice making machines 22 is reduced. Therefore, in the other reamer type ice making machine 22, the amount of ice making per unit time is adjusted by increasing the reamer rotation speed of the reamer 108 as compared with the phase A.

Next, in Phase C, it is necessary to operate four of the reamer type ice making machines 22, but the three reamer type ice making machines 22 are fully operated to produce the maximum amount of ice per unit time. In one reamer type ice making machine 22, the amount of ice making per unit time is adjusted by reducing the reamer rotation speed of the reamer 108.

Finally, in Phase D, it is necessary to operate five reamer-type ice makers 22, but four reamer-type ice makers 22 are fully operational to produce the maximum amount of ice per unit time. In the other reamer type ice making machine 22, the amount of ice making per unit time is adjusted by reducing the reamer rotation speed of the reamer 108.
In this case, in each system, flaky ice pieces made from a plurality of reamer type ice making machines 22 are mixed and used for an environmental test. In a test where ice quality is important, the ice quality should be as low as possible. It is preferable that the ice making conditions, the water temperature, the refrigerant evaporation temperature, or the reamer rotation speed of the reamer 108 are the same in each reamer type ice making machine 22 so as to be the same.

As described above, when the change in the ice making amount per unit time required in the snow environment test is determined in advance, the reamer type ice making machines 22 are set in the ice making ready state before the start of the test accordingly. When necessary, by using coarse control based on the number of reamer type ice making machines 22 and fine control based on adjustment of ice making parameters, for example, ice quality due to ice storage in the ice grain state after ice breaking. On the other hand, it is possible to manufacture a necessary amount of ice making per unit time in a timely manner on the spot in real time without denaturing. Therefore, it contributes to the snow environment test which can acquire highly reliable test data.
In addition, when the required amount of ice making per unit time has been determined in advance, the required amount of ice making per unit time may fluctuate in the field depending on the progress of the test. By using such rough control and fine control in combination, it is possible to flexibly cope with this.

For example, assume that the amount of ice making per unit time is increased.
When it is required to reduce the particle size of the ice particles after crushing, ice is made from the thin ice layer by the selected reamer type ice making machine 22 on the premise that the interval between the pair of crushing drums is narrowed. When flaky ice pieces are crushed with a crushing drum to form ice particles, the thickness of the thin ice layer is reduced by adjusting the feed water temperature, the refrigerant evaporation temperature, and the reamer rotation speed by increasing the ice making volume per unit time. Prevents the ice from becoming hindered due to the increase, and the surface of the thin ice layer is wetted so that the ice particles that have been crushed adhere to each other and the diameter of the ice particles does not increase. Therefore, the following adjustments are made.
As shown in FIG. 6, the maximum thickness of the ice layer formed before the flake ice pieces are peeled by the reamer and the ice temperature of the ice flakes to be iced are set in advance, and the maximum ice layer is set. According to the thickness and the ice temperature, there is a step of increasing the reamer rotation speed while decreasing the feed water temperature while increasing the ice making amount per unit time while maintaining the refrigerant evaporation temperature constant. In this case, as the ice making amount per unit time increases, the reamer rotation speed increases linearly while the feed water temperature decreases linearly.
Thus, as in the past, with increasing ice production per unit time, the water supply temperature, the refrigerant evaporation temperature, and the reamer rotation speed are adjusted randomly, causing problems in ice breaking, It is possible to prevent an increase in diameter due to adhesion, and to smoothly perform an environmental test using the reduced-diameter ice particles.
If there is no change in the particle size of the ice particles after crushing, the thickness of the thin ice layer will be adjusted by adjusting the feed water temperature, the refrigerant evaporation temperature, and the reamer rotation speed by increasing the ice making volume per unit time. The necessity to prevent the ice breakage from occurring due to the increase in the ice is the same, but when the surface of the thin ice layer gets wet, the broken ice particles adhere to each other and spread of the ice particles. Since the possibility of diameter reduction is reduced, the following adjustment may be performed.
As shown in FIG. 7, after the thickness of the ice layer formed before the flake-shaped ice pieces are peeled off by the reamer is set in advance, the ice production amount per unit time is increased so that the thickness of the ice layer becomes constant. At the same time, there is a step of increasing the reamer rotation speed while lowering the coolant evaporation temperature and lowering the feed water temperature. In this case, as the ice making amount per unit time increases, the reamer rotation speed is linearly increased while the coolant evaporation temperature is linearly decreased and the feed water temperature is linearly decreased.
As a result, as in the past, with the increase in ice making volume per unit time, the water supply temperature, the refrigerant evaporation temperature, and the reamer rotation speed are adjusted randomly, preventing problems in ice breaking. It is possible to carry out environmental tests smoothly.
In any case, as shown in FIGS. 6 and 7, the reamer type ice making machine 22 is used to linearly approximate the relationship between the ice making amount per unit time and the feed water temperature, the refrigerant evaporation temperature, and the reamer rotation speed. In this case, a test run may be performed to acquire data.

According to the reamer type ice making method having the above configuration, after presetting the maximum thickness of the ice layer formed before breaking into flaky ice pieces by the reamer and the ice temperature of the flaky ice pieces to be iced, According to the set maximum ice layer thickness and ice temperature, the refrigerant evaporating temperature is kept constant, the ice making amount per unit time is increased, and the reamer rotation speed is increased while the feed water temperature is decreased. Therefore, when transporting and using ice particles obtained by crushed ice pieces, the flake-like ice pieces are iced by limiting the thickness of the ice pieces to a certain limit as long as the necessary ice making amount can be secured. During the ice breaking step, the ice breakage is not disturbed, and the ice temperature of the flake-like ice pieces is adjusted to adjust the ice temperature of the flake ice pieces. With As a result, the flake-shaped ice pieces having a desired ice temperature and / or desired ice thickness can be efficiently and smoothly produced without blocking the conveyance path or causing the diameter of the ice particles to increase due to adhesion between the ice particles. Ice making is possible.

Hereinafter, a second embodiment of the present invention will be described with reference to FIG. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, the characteristic portions of the present embodiment will be described in detail.
A feature of the present embodiment is the ice making device 22, in which an ice making surface is provided and water is allowed to flow along the ice making surface cooled by the refrigerant, thereby forming a thin ice layer on the ice making surface and not contacting the ice making surface. Thus, the flake-shaped ice pieces are obtained by peeling the thin ice layer from the ice making surface, which is the same as in the first embodiment. However, the characteristic part of this embodiment is that the ice making device 22 It is in the peeling mode of the ice made.

More specifically, the ice making surface is formed on the inner peripheral surface of the cylindrical drum in the first embodiment, but in this embodiment, the ice formed on the outer peripheral surface of the cylindrical drum is peeled off. Regarding the aspect, in the first embodiment, the inner peripheral surface of the cylindrical drum, which is the ice making surface, is fixed using the reamer, and the flaky ice pieces are separated from the ice making surface by revolving and / or rotating the reamer. However, in this embodiment, flake-shaped ice pieces are peeled off from the ice making surface by revolving the outer peripheral surface of the cylindrical drum, which is the ice making surface, using a fixed blade.

More specifically, for the water supply system, water from the sprinkling pipe 208 is sprinkled on the outer cylindrical ice making surface 200 of the cylindrical drum 206 in the casing 204, and the water touches the cooled ice making surface 200 and freezes. Excess water flows into the upper tray 212 in the frame. At that time, in order to manufacture the ice in a dry and supercooled state, water is not sprayed before the fixed blade 202. Excess water from the ice making surface 200 of the cylindrical drum 206 flows from the upper tray 212 to the water storage tank 222 and is recirculated by the pump 220 through the slot valve 210.
The fixed blade 202 has a length extending in the vertical direction of the cylindrical drum 206, and when the cylindrical drum 206 revolves, the thin ice layer formed on the ice making surface 200 is peeled off by the fixed blade 202, and the ice making device 22 It falls to the front of the center. The fixed blade 202 is prevented from contacting the ice making surface 200.

With respect to the refrigerant system, liquid refrigerant is supplied into the cylindrical drum 206 through the pipe 216 and the stuffing box 214, and saturated refrigerant gas is discharged from the cylindrical drum 206 through the stuffing box 218. For example, the liquid level is adjusted by a liquid level adjuster that controls an electromagnetic valve on the liquid pipe so that it is always immersed in the refrigerant.

In the configuration as described above, the ice making amount and the required ice piece temperature per required unit time are set in advance, and the ice formation speed and formation on the ice making surface are formed based on the ice making amount and the required ice piece temperature per required unit time. In order to adjust the rate of ice formation on the ice making surface in order to adjust the peeling rate of the ice from the ice making surface, the temperature of the feed water used for forming ice by freezing, as in the first embodiment, The evaporation temperature of the refrigerant used for freezing the feed water may be adjusted. In order to adjust the peeling speed of the formed ice from the ice making surface, the rotation speed of the reamer is adjusted in the first embodiment. In this embodiment, the revolution number of the cylindrical drum may be adjusted.

Thus, in this embodiment, when compared with the ice making parameters of the first embodiment, the only difference is that the number of revolutions of the reamer is the number of revolutions of the cylindrical drum, and the flaky ice using the ice making parameters is different. The ice making method for making pieces is common, and if the maximum thickness of the ice layer formed before flake ice pieces are peeled and the ice temperature of the ice pieces to be made are set in advance, the set ice Depending on the maximum thickness of the layer and the ice temperature, it is only necessary to increase the peel rate while lowering the feed water temperature while increasing the ice making amount per unit time while keeping the refrigerant evaporation temperature constant, while flake ice When the thickness of the ice layer formed before the piece is peeled is set in advance, the ice supply amount per unit time is increased and the refrigerant evaporation temperature is lowered while keeping the ice layer thickness constant. water temperature While reducing, it may be increased peel rate.

Below, 3rd Embodiment of this invention is described, referring FIG. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, the characteristic portions of the present embodiment will be described in detail.
A feature of the present embodiment is the ice making device 300, which is provided with an ice making surface 200, and by flowing water along the ice making surface 200 cooled by the refrigerant, a thin ice layer is formed on the ice making surface 200 to obtain ice pieces. In this respect, the features of the present embodiment are common to the first embodiment and the second embodiment, but the feature of the present embodiment is the deicing of the ice making formed in the ice making device 300.

More specifically, in the first embodiment, for the ice formed on the inner peripheral surface of the cylindrical drum, the reamer is used to fix the inner peripheral surface of the cylindrical drum, which is the ice making surface, and to rotate and / or rotate the reamer. The flake-shaped ice pieces are physically separated from the ice making surface by making the cylindrical drum which is the ice making surface using a fixed blade for the ice formed on the outer peripheral surface of the cylindrical drum in the second embodiment. The flake-shaped ice pieces were physically separated from the ice making surface by revolving the outer peripheral surface of the ice, but in this embodiment, the ice layer attached to the ice making surface is not physically separated. The ice is deiced by melting the inner surface of the glass by heating.

More specifically, as shown in FIG. 9, the ice making device 300 is a so-called plate type, and includes an ice making surface 200, a water supply system that supplies water to be frozen on the ice making surface, and the ice making surface 200. A cooling system for cooling from the inside and a heating system for heating the ice making surface 200 from the inside are provided.

In the configuration as described above, during ice making, as shown in FIG. 9A, water 314 is sprinkled toward the ice making surface 200, and the ice 316 is cooled by the refrigerant 318 flowing inside the ice making surface 200. When the ice 316 reaches a certain thickness, the water spraying stops as shown in FIG. 9B, and the water is supercooled by the refrigerant 318 flowing inside the ice making surface 200. ), The refrigerant hot gas 320 is sent toward the inside of the ice making surface 200, the ice making surface 200 is heated from the inside, and the inner surface of the ice layer adhering to the ice making surface 200 is melted by heating. It's iced.
The first implementation is to preset the ice making amount and the required ice piece temperature per required unit time and adjust the ice formation speed on the ice making surface 200 based on the ice making amount and the required ice piece temperature per required unit time. Similar to the embodiment and the second embodiment, the temperature of the water supply used to form ice by freezing may be adjusted. To adjust the deicing speed from the ice making surface 200, ice adhering to the ice making surface 200 is used. If even the inner surface of the layer is melted, it is deiced and falls downward from the ice making surface 200. Therefore, the heating time interval by the refrigerant hot gas 320 in the heating system may be adjusted. On the other hand, the deicing per request unit time, that is, the amount of ice making decreases, while if the heating time interval is shortened, the deicing per request unit time, that is, the ice making amount increases.
As in the first and second embodiments, there is a step of linearly increasing the deicing speed corresponding to the peeling speed while linearly decreasing the feed water temperature as the ice making amount per unit time increases. Alternatively, the step of linearly increasing the deicing speed corresponding to the peeling speed while linearly decreasing the feed water temperature while linearly decreasing the refrigerant evaporation temperature as the ice making amount per unit time increases. You may have.
In addition, when conducting on-snow tests simulating natural snow, the ice layer thickness and / or ice temperature of ice pieces to be made are set in advance according to the ice making amount and / or ice quality per unit time required in the snow test. Alternatively, when the ice layer is formed by freezing the water supply with the refrigerant, the ice making surface 200 of the stainless steel iced plate 302 is sufficiently cooled with the refrigerant to the extent that the water supply is frozen before the start of the snow test. You may have a step to keep.
Further, as in the first embodiment, when performing an environmental test using artificial snow using the plate type ice making device of the present embodiment, the step of coarsely adjusting the ice making amount by selecting the number of ice making devices And the step of fine-tuning the ice making amount per unit time in the selected ice making machine according to the difference between the necessary amount of artificial snow and the roughly adjusted ice making amount per unit time. Good.

Below, 4th Embodiment of this invention is described, referring FIG. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, the characteristic portions of the present embodiment will be described in detail.
A feature of the present embodiment is the ice making device 22, in which an ice making surface is provided and water is allowed to flow along the ice making surface cooled by the refrigerant, thereby forming a thin ice layer on the ice making surface and not contacting the ice making surface. Thus, the flake-shaped ice pieces are obtained by peeling the thin ice layer from the ice making surface, which is the same as in the first embodiment. However, the characteristic part of this embodiment is that the ice making device 22 It is in the peeling mode of the ice made.

More specifically, the ice making surface is formed on the inner peripheral surface of the cylindrical drum in the first embodiment, but in this embodiment, the ice formed on the outer peripheral surface of the cylindrical drum is peeled off. Regarding the aspect, in the first embodiment, the inner peripheral surface of the cylindrical drum, which is the ice making surface, is fixed using the reamer, and the flaky ice pieces are separated from the ice making surface by revolving and / or rotating the reamer. However, in this embodiment, the flake-shaped ice pieces are peeled off from the ice making surface formed on the outer peripheral surface of the fixed cylindrical drum, which is the ice making surface, using a rotary blade.

As shown in FIG. 10B, the rotary blade 202 is provided with a cylindrical drum 211 to which the rotary blade 202 is fixed, concentrically with the fixed cylindrical drum 206 and spaced from the outer peripheral side of the fixed cylindrical drum 206. 202 has a length extending in the vertical direction of the fixed cylindrical drum 206, and a thin ice layer formed on the ice making surface 200 is peeled off by the rotary blade 202 when the cylindrical drum 211 to which the rotary blade 202 is fixed revolves. The ice making device 22 is dropped to the front surface of the center portion. Note that the rotary blade 202 is not in contact with the ice making surface 200.
In addition, about a water supply system and a refrigerant | coolant system, since it is substantially the same as 2nd Embodiment, the description is abbreviate | omitted.

In the configuration as described above, the ice making amount and the required ice piece temperature per required unit time are set in advance, and the ice formation speed and formation on the ice making surface are formed based on the ice making amount and the required ice piece temperature per required unit time. In order to adjust the rate of ice formation on the ice making surface in order to adjust the peeling rate of the ice from the ice making surface, the temperature of the feed water used for forming ice by freezing, as in the first embodiment, The evaporation temperature of the refrigerant used for freezing the feed water may be adjusted. In order to adjust the peeling speed of the formed ice from the ice making surface, the rotation speed of the reamer is adjusted in the first embodiment. In this embodiment, the rotational speed of the rotary blade may be adjusted.

Thus, in this embodiment, when compared with the ice making parameters of the first embodiment, the only difference is that the reamer rotation speed becomes the rotation speed of the rotary blade, and the flaky ice using the ice making parameters is different. The ice making method for making pieces is common, and if the maximum thickness of the ice layer formed before flake ice pieces are peeled and the ice temperature of the ice pieces to be made are set in advance, the set ice Depending on the maximum thickness of the layer and the ice temperature, it is only necessary to increase the peel rate while lowering the feed water temperature while increasing the ice making amount per unit time while keeping the refrigerant evaporation temperature constant, while flake ice When the thickness of the ice layer formed before the piece is peeled is set in advance, while increasing the ice making amount per unit time and decreasing the refrigerant evaporation temperature so that the ice layer thickness is constant, Temperature While made, it may be increased peel rate.
When compared with the second embodiment, in the second embodiment (FIG. 10A), the rotation speed of the rotary drum is adjusted, whereas in this embodiment, the rotation speed of the rotary blade is set. In the second embodiment, the annular thin ice layer formed on the outer peripheral surface of the rotating drum may be peeled off or dropped from the outer peripheral surface as the rotating drum rotates. , There is a merit to eliminate such possibility.

Below, 5th Embodiment of this invention is described, referring FIG. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, the characteristic portions of the present embodiment will be described in detail.
A feature of the present embodiment is the ice making device 22, in which an ice making surface is provided and water is allowed to flow along the ice making surface cooled by the refrigerant, thereby forming a thin ice layer on the ice making surface and not contacting the ice making surface. Thus, the flake-shaped ice pieces are obtained by peeling the thin ice layer from the ice making surface, which is the same as in the first embodiment. However, the characteristic part of this embodiment is that the ice making device 22 It is in the peeling mode of the ice made.

More specifically, the ice making surface is formed on the inner peripheral surface of the cylindrical drum in the first embodiment, but in this embodiment, the ice making surface is formed on the inner peripheral surface of the cylindrical drum. Regarding the peeling mode, in the first embodiment, the reamer is used to fix the inner peripheral surface of the cylindrical drum, which is the ice making surface, and the reamer is revolved and / or rotated so that flake-like ice pieces are removed from the ice making surface. In this embodiment, flake-shaped ice pieces are peeled from the ice making surface formed on the outer peripheral surface of the fixed cylindrical drum, which is the ice making surface, using the rotary blade.

As shown in FIG. 10C, with respect to the rotary blade 202, a cylindrical drum 211 to which the rotary blade 202 is fixed is provided concentrically with the fixed cylindrical drum 206, spaced apart from the inner peripheral side of the fixed cylindrical drum 206, and rotated. The blade 202 has a length extending in the vertical direction of the fixed cylindrical drum 206, and a thin ice layer formed on the ice making surface 200 is formed by the rotary blade 202 when the cylindrical drum 211 to which the rotary blade 202 is fixed revolves. It peels off and falls to the front surface of the center part of the ice making device 22. Note that the rotary blade 202 is not in contact with the ice making surface 200.
In addition, about a water supply system and a refrigerant | coolant system, since it is substantially the same as 2nd Embodiment, the description is abbreviate | omitted.

In the configuration as described above, the ice making amount and the required ice piece temperature per required unit time are set in advance, and the ice formation speed and formation on the ice making surface are formed based on the ice making amount and the required ice piece temperature per required unit time. In order to adjust the rate of ice formation on the ice making surface in order to adjust the peeling rate of the ice from the ice making surface, the temperature of the feed water used for forming ice by freezing, as in the first embodiment, The evaporation temperature of the refrigerant used for freezing the feed water may be adjusted. In order to adjust the peeling speed of the formed ice from the ice making surface, the rotation speed of the reamer is adjusted in the first embodiment. In this embodiment, the rotational speed of the rotary blade may be adjusted.

Thus, in this embodiment, when compared with the ice making parameters of the first embodiment, the only difference is that the reamer rotation speed becomes the rotation speed of the rotary blade, and the flaky ice using the ice making parameters is different. The ice making method for making pieces is common, and if the maximum thickness of the ice layer formed before flake ice pieces are peeled and the ice temperature of the ice pieces to be made are set in advance, the set ice Depending on the maximum thickness of the layer and the ice temperature, it is only necessary to increase the peel rate while lowering the feed water temperature while increasing the ice making amount per unit time while keeping the refrigerant evaporation temperature constant, while flake ice When the thickness of the ice layer formed before the piece is peeled is set in advance, while increasing the ice making amount per unit time and decreasing the refrigerant evaporation temperature so that the ice layer thickness is constant, Temperature While made, it may be increased peel rate.
When compared with the second embodiment, in the second embodiment (FIG. 10A), the rotation speed of the rotary drum is adjusted, whereas in this embodiment, the rotation speed of the rotary blade is set. In the second embodiment, the annular thin ice layer formed on the outer peripheral surface of the rotating drum may be peeled off or dropped from the outer peripheral surface as the rotating drum rotates. , There is a merit to eliminate such possibility.
Further, when compared with the fourth embodiment, the ice making surface is formed on the outer peripheral surface of the fixed cylindrical drum 206 in the fourth embodiment, whereas in this embodiment, the ice making surface is formed on the fixed cylindrical drum 206. It is formed on the inner peripheral surface.

The embodiments of the present invention have been described in detail above, but various modifications or changes can be made by those skilled in the art without departing from the scope of the present invention.
For example, in the present embodiment, the description has been made on the assumption of reamer-type ice making, but without being limited thereto, the temperature of the water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the water, And in the ice making method of making flaky ice pieces by adjusting the peeling speed for peeling the flaky ice pieces from the circumferential surface of the ice layer formed in an annular shape, formed before peeling the flaky ice pieces Preset the maximum thickness of the ice layer and the ice temperature of the flaky ice pieces to be made, and keep the refrigerant evaporation temperature constant according to the set maximum thickness of the ice layer and the ice temperature. It may have a step of increasing the peeling speed while decreasing the feed water temperature as the amount of ice making increases, or the temperature of the feed water used to form ice by freezing, the feed water is frozen. In an ice making method of making flaky ice pieces by adjusting the evaporation temperature of the refrigerant used to remove the flake ice pieces from the circumferential surface of the ice layer formed in an annular shape, The stage of pre-setting the thickness of the ice layer formed before peeling the piece, and the water supply temperature while decreasing the refrigerant evaporation temperature as the ice making amount increases per unit time so that the ice layer thickness is constant There may be a step of increasing the peeling rate while lowering.

For example, in the present embodiment, it has been described that wet snow is used in the environmental test. However, the present invention is not limited to this, and dry snow may be used as long as the ice is crushed into ice grains.
For example, in the present embodiment, the reamer type ice making has been described as revolving and rotating, but the present invention is not limited thereto, and the revolving speed may be adjusted only by revolving the reamer.
For example, in the present embodiment, ice produced ice has been described as being used as a snowstorm by putting a snowfall from a blowout nozzle on a background airflow in an environmental test. It may be used as a snowstorm by itself, or ice made may be used as a natural snowfall in an environmental test.

1 is a schematic overall view of an environmental test system according to a first embodiment of the present invention. 1 is a perspective view showing an internal structure of an ice making machine in an environmental test system according to a first embodiment of the present invention. In the environmental test system which concerns on 1st Embodiment of this invention, it is a principle figure which shows the condition of the snowstorm produced in a wind tunnel. It is a graph which shows rough adjustment of the amount of ice making per unit time of artificial snow in the environmental test system concerning a 1st embodiment of the present invention. It is a graph which shows the fine adjustment of the ice making amount per unit time of artificial snow in the environmental test system which concerns on 1st Embodiment of this invention. It is a graph which shows adjustment of the ice making amount per unit time by each ice making machine of FIG. It is a graph which shows adjustment of the ice making amount per unit time by each ice making machine of FIG. In the environmental test system which concerns on 2nd Embodiment of this invention, it is a perspective view which shows the internal structure of an ice making machine, and is a figure similar to FIG. In the environmental test system which concerns on 3rd Embodiment of this invention, it is a perspective view which shows the internal structure of an ice making machine, and is a figure similar to FIG. It is a simplified sectional view about an ice making machine concerning a 2nd embodiment, a 4th embodiment, and a 5th embodiment of the present invention.

V Vehicle 10 Snow environment test system 12 Snow blowing supply system 14 Air flow supply system 16 Wind tunnel 18 Low greenhouse 20 Ice making room 22 Ice making machine 24 Ice temperature stabilization conveyor 26 Ice breaker 28 Blower 30 Cooler 32 Wet snow device 34 Distributing device 36 Outlet nozzle 38 Snow Blow Collection Device 40 Snow Supply Pipe 42 Suction Port 44 Air Duct 102 Ice Making Cylinder 104 Water Sprinkling Part 106 Storage Part 108 Reamer 112 Blade 110 Refrigerant Channel 111 Central Axis 200 Ice Making Surface 202 Fixed Blade
204 Casing 206 Cylindrical drum 208 Sprinkling pipe 210 Slot valve 211 Cylindrical drum
212 Upper tray 214 Stuffing box 216 Pipe 218 Stuffing box 220 Pump 222 Water tank 300 Ice making device 302 Stainless steel ice plate 314 Sprinkling 316 Ice 318 Refrigerant 320 Refrigerant hot gas

Claims (21)

Cooling the feed water flowing on the ice making surface with a refrigerant to form ice, icing the ice formed on the ice making surface as flaky ice, crushing the iced flaky ice into ice particles, In the method of supplying ice, the ice particles are transported through the transport pipe by compressed air ,
Presetting the required ice making volume and the required ice piece temperature per unit time;
Ice formation on the ice making surface based on the required ice production per unit time and the required ice piece temperature, depending on the maximum thickness of flake ice required in the ice breaking stage and the maximum moisture content required in the conveying stage comprising the step of adjusting the de-ice speed from the ice making surface of the speed and the formed ice supply method of ice, characterized in that. The step of deicing the ice formed on the ice making surface is performed by mechanically peeling the ice formed on the ice making surface,
The ice making method according to claim 1, wherein the step of adjusting the deicing speed of the ice from the ice making surface is adjusting the mechanical peeling speed of ice. The deicing step is performed by heating ice formed on the ice making surface from the inside of the ice making surface,
The adjustment step of the deicing speed of the ice from the ice making surface is adjustment of an interval of heating time of ice.
The ice making method described in 1. Ice by adjusting the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the peeling speed at which the ice pieces are peeled off from the circumferential surface of the ice layer formed in an annular shape In the ice making method for making pieces of ice,
Presetting the maximum thickness of the ice layer formed before peeling the ice pieces, and the ice temperature of the ice pieces to be made;
According to the set maximum ice layer thickness and ice temperature, the refrigerant evaporation temperature is kept constant, the ice making amount per unit time is increased, and the water supply temperature is lowered while the peeling rate is increased. An ice making method characterized by. Ice by adjusting the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the peeling speed at which the ice pieces are peeled off from the circumferential surface of the ice layer formed in an annular shape In the ice making method for making pieces of ice,
Pre-setting the thickness of the ice layer formed before peeling the ice pieces;
The ice making is characterized by having a step of increasing the peeling rate while lowering the feed water temperature while lowering the coolant evaporation temperature and lowering the water supply temperature as the ice making amount increases per unit time so that the thickness of the ice layer becomes constant. Method. A blade that can revolve concentrically with the ice layer with respect to the temperature of the water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the water, and the circumferential surface of the ice layer formed in an annular shape In the reamer-type ice making method of making flaky ice pieces by adjusting the number of revolutions of the reamer that bites the flake-like ice pieces,
Presetting the maximum thickness of the ice layer formed before the flake ice pieces are peeled off by the reamer, and the ice temperature of the ice flakes to be made;
Depending on the maximum ice layer thickness and ice temperature set, the refrigerant evaporation temperature is kept constant, while the ice making volume per unit time increases and the feed water temperature decreases while the reamer rotation speed is increased and the peeling speed is increased. A reamer-type ice making method. Fixed to the ice layer with respect to the temperature of the water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the water, and the circumferential surface of the ice layer formed in an annular shape on the outer circumferential surface of the rotating drum In an ice making method for making ice flakes by adjusting the number of revolutions of a rotating drum that causes the blades to bite in from the outside and peel the flake ice pieces,
Presetting the maximum thickness of the ice layer formed before peeling the flaky ice pieces, and the ice temperature of the flaky ice pieces to be iced,
Depending on the maximum ice layer thickness and ice temperature, the refrigerant evaporating temperature is kept constant, the ice production per unit time is increased, the feed water temperature is lowered and the rotating drum rotation speed is increased and the peeling speed is increased. The method of making ice, comprising the step of increasing Concentration of the ice layer with respect to the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the circumferential surface of the ice layer formed annularly on the outer circumferential surface of the rotating drum In the ice making method of making flaky ice pieces by adjusting the revolution speed of the blade to rip off the flaky ice pieces by biting in a blade that can revolve in the shape of the outside,
Presetting the maximum thickness of the ice layer formed before peeling the flaky ice pieces, and the ice temperature of the flaky ice pieces to be iced,
Depending on the set maximum ice layer thickness and ice temperature, while keeping the refrigerant evaporation temperature constant, while increasing the ice making volume per unit time and lowering the feed water temperature, the blade revolution speed is increased and the peeling speed is increased. An ice making method comprising the steps of increasing. With respect to the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the circumferential surface of the ice layer formed in an annular shape on the inner circumferential surface of the rotating drum, In an ice making method of making flake-shaped ice pieces by adjusting the revolution speed of the blade to bite the flake-like ice pieces by biting in concentric revolving blades from the inside,
Presetting the maximum thickness of the ice layer formed before peeling the flaky ice pieces, and the ice temperature of the flaky ice pieces to be iced,
Depending on the set maximum ice layer thickness and ice temperature, while keeping the refrigerant evaporation temperature constant, while increasing the ice making volume per unit time and lowering the feed water temperature, the blade revolution speed is increased and the peeling speed is increased. An ice making method comprising the steps of increasing. The ice making method according to any one of claims 4 to 9, further comprising a step of linearly increasing the peeling rate while linearly decreasing a feed water temperature as the amount of ice making per unit time increases. A blade that can revolve concentrically with the ice layer with respect to the temperature of the water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the water, and the circumferential surface of the ice layer formed in an annular shape In a reamer-type ice making method in which flaky ice pieces are made by adjusting the number of revolutions of the reamer to bite the flake-like ice pieces, the ice layer formed before the flaky ice pieces are peeled off by the reamer In order to keep the thickness of the ice layer constant and to increase the ice making volume per unit time, the refrigerant evaporating temperature is lowered and the water supply temperature is lowered while the reamer rotation speed is increased. A reamer type ice making method characterized by having a step of increasing the peeling rate. Fixed to the ice layer with respect to the temperature of the water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the water, and the circumferential surface of the ice layer formed in an annular shape on the outer circumferential surface of the rotating drum An ice layer formed before flake-like ice pieces are peeled in an ice making method of making flake-like ice pieces by adjusting the number of revolutions of a rotating drum that bites the blades from the outside and peels the flake-like ice pieces. The number of revolutions of the rotating drum is reduced while the coolant temperature is lowered and the feed water temperature is lowered while the ice making amount per unit time is increased and the ice water temperature is lowered so that the thickness of the ice layer is constant. An ice making method comprising the steps of increasing and increasing the peel rate. Concentration of the ice layer with respect to the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the circumferential surface of the ice layer formed annularly on the outer circumferential surface of the rotating drum In the ice making method of making flake-shaped ice pieces by adjusting the revolution speed of the blade to bite the flake-shaped ice pieces by biting in a blade that can be revolved from the outside, formed before peeling the flake-shaped ice pieces Pre-set the thickness of the ice layer to be formed, and increase the ice making amount per unit time so that the ice layer thickness is constant, while decreasing the coolant evaporation temperature and the feed water temperature, An ice making method comprising the steps of increasing a revolution speed and increasing a peeling speed. With respect to the temperature of the feed water used to form ice by freezing, the evaporation temperature of the refrigerant used to freeze the feed water, and the circumferential surface of the ice layer formed in an annular shape on the inner circumferential surface of the rotating drum, In the ice making method of making flaky ice pieces by adjusting the revolution speed of the blades to bite the flaky ice pieces by biting in concentrically revolving blades from the inside, before peeling the flaky ice pieces The step of presetting the thickness of the ice layer to be formed, and the blades while reducing the water supply temperature while lowering the coolant evaporation temperature as well as increasing the ice making amount per unit time so that the ice layer thickness is constant An ice making method comprising the steps of increasing the revolution speed and increasing the peeling speed. The step of linearly increasing the separation rate while linearly decreasing the feed water temperature while linearly decreasing the refrigerant evaporation temperature as the ice making amount per unit time is increased. The ice making method of any one of these. When performing a snow test simulating natural snow, the thickness of the ice layer and / or the ice temperature of the ice pieces to be made are set in advance according to the ice making amount and / or ice quality per unit time required in the snow test. The ice making method according to any one of claims 1 to 15. When an ice layer is formed by freezing the water supplied to the inner or outer surface of the ice making cylinder by cooling the inner or outer surface with a refrigerant from the outer or inner surface of the ice making cylinder, a snow test The ice making according to any one of claims 1 to 16, further comprising a step of sufficiently cooling an inner peripheral surface or an outer peripheral surface of the ice making cylinder using a refrigerant so that the water supply is frozen before the start of the operation. Method. A substantially cylindrical ice making cylinder having an inner or outer peripheral surface as an ice making surface, a sprinkler for supplying water that forms ice toward the inner or outer peripheral surface of the ice making cylinder, and an inner periphery of the ice making cylinder A reamer that breaks ice while moving along a surface or an outer peripheral surface, the reamer has a plurality of blades for breaking ice, the cutting edge of which is arranged in a spiral manner around a substantially columnar rotation shaft, By trial running a reamer type ice making device that can peel off the ice thin layer formed on the ice making surface as flaky ice by revolving around the rotation axis of the reamer ice making cylinder and / or rotating around the rotation axis, Preliminarily linearly approximating the relationship between ice making volume per unit time and water supply temperature, the relationship between ice making volume per unit time and revolution of reamer and / or rotation speed, and the relationship between ice making volume per unit time and ice thickness ,
For a given amount of ice making per unit time , determine the feed water temperature, reamer rotation speed and ice thickness according to the maximum flake ice thickness required in the ice breaking stage and the maximum moisture content required in the transport stage. Stages,
The stage of making ice by reamer type ice making according to the calculated water supply temperature and reamer rotation speed,
Crushing the deiced flaky ice into ice particles,
A method of supplying ice by reamer-type ice making, the method comprising transporting ice particles through a transport pipe by compressed air . In the method of conducting environmental tests using artificial snow,
Depending on the total required amount of artificial snow used for the environmental test, an arbitrary number of ice makers that produce ice pieces is selected, and each selected ice machine is made before the start of the environmental test. Ready to be ready,
Adjusting the ice making amount per unit time according to the change in the required amount of artificial snow used for environmental testing by making ice with the prepared ice making machine,
Crushing ice pieces made by the selected ice making machine into ice particles,
Transporting ice-shaped artificial snow through a transport pipe by compressed air, and
In the ice making machine, the preparation step to the ice making ready state includes a step of forming a thin ice layer on the thin ice forming surface of the ice making machine at the time of starting the environmental test,
The environmental test method according to any one of claims 1 to 12, wherein the ice making stage by the prepared ice making machine is the ice making method according to any one of claims 1 to 12. The environmental test method according to claim 19, wherein the transporting step includes a step of simulating a snowstorm by spraying ice-shaped artificial snow from an end opening of the transport pipe. The ice making stage by the prepared ice making machine is a step of roughly adjusting the ice making amount per unit time according to the change in the required amount of artificial snow used for the environmental test by making the ice making by the prepared ice making machine. A step of finely adjusting the ice making amount per unit time in the selected ice making machine according to the difference between the required amount of artificial snow and the roughly adjusted ice making amount per unit time in response to changes in the required amount of artificial snow to be used The environmental test method according to claim 19 or 20, wherein:

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