JPH0612208B2 - Ice mass production system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention produces an ice block as a cold heat source for low temperature storage, etc., by freezing ice in an ice reservoir with a waterproof sheet on the inside and a heat insulating material on the outside. It relates to an ice mass production system.

[Conventional technology]

As a method for obtaining a cold heat source for low temperature storage of vegetables in the agricultural field and a cold heat source for leisure and other facilities that require a low temperature environment, a method of cooling with an electric ice making device or natural ice frozen in swamps, lakes, rivers, etc. A method of cutting out as an ice block, a method of making ice with a snow-ice converter, which is partially used, and using it as a cold heat source, are adopted.

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional method, for example, a method using an electric ice making device consumes a large amount of electric power, resulting in high ice making cost and is not suitable for storing agricultural products and the like having low added value. Further, in the method of cutting out natural ice generated in a swamp, a lake, a river, etc. as an ice block, it is not always possible to obtain the ice near a place where the ice is desired to be used, and it is locally limited. Therefore, if the place of use is remote,
There is a problem that transportation costs will increase if the amount becomes large. In addition, this method involves cutting work on ice in swamps, lakes, rivers, etc., which is dangerous. Similarly, the snow-ice converter method consumes a large amount of electric power, resulting in a high cost, and it also costs money to move the snow and bring the ice into the warehouse. Moreover, this method is not suitable for areas with little snow, and there is a problem that it is locally limited.

The present invention is intended to solve the above problems, and an object of the present invention is to provide an ice lump manufacturing system with low initial cost and running cost and high safety.

[Means for Solving the Problems]

Therefore, the present invention is an ice lump production system for producing an ice lump by freezing the inside of an ice basin covered with a heat insulating material to cover the outside with a plurality of nozzles for pouring water from above into the ice basin, Moving means for moving a plurality of nozzles, water injection means for supplying water to a plurality of nozzles from a water tank, measuring means for measuring the weather environment such as outside air temperature and the condition of the water injection system such as flow rate, and measurement data measured by the measuring means. It is characterized in that it is equipped with a control means for controlling the urging means and the water injection means so that the water injection condition is determined from the above to determine the number of nozzles to be injected, and water is injected from the determined number of nozzles while moving the nozzles. It is a thing.

[Action]

In the ice lump manufacturing method of the present invention, in the control means, the measuring means collects the measurement data of the meteorological environment and the water injection system to determine the water injection condition, and controls the water injection system. Can set and control the water injection system. Further, by having a plurality of nozzles and a nozzle moving mechanism, and controlling the number and movement of the nozzles for water injection according to the water injection conditions, it is possible to efficiently manufacture ice blocks.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a system configuration diagram for explaining one embodiment of an ice lump manufacturing method according to the present invention.

In FIG. 1, 1 is an ice pound, 2 is a waterproof sheet,
3 is a heat insulating material, 4 is a hollow pipe, 5 is gravel or sand, 6-1
And 6-2 are nozzles, 6-3 is a nozzle box, 7 is a radiator pipe, 8 is a flow meter, 9 is a pressure gauge, 10 is a pump, 11 is a water tank, 12 is a temperature sensor, 13 is an anemometer, 1
Reference numeral 4 is a snowfall rainfall sensor, 15 is a radiation balance meter, and V1 to V4 are valves.

The ice pond 1 is a pond of an ice pool in which a waterproof sheet 2 is put on the inside, the outside is covered with a heat insulating material 3, and a sand or gravel 5 is laid on the bottom with a gentle slope, and the nozzles 6-1 and 6- Two
It is a place to receive spray water from and make ice. The upper part is
It is opened during ice making and is covered with a film material that has heat insulating and waterproof properties except during ice making. Also, at the bottom of Ice Pond 1,
The hollow pipe 4 is buried as necessary, and is used to remove the heat transferred to the lower part of the heat generated when the introduced water is frozen by circulating the cold air. The hollow pipe 4 may be replaced with a heat pipe, but the adoption thereof is determined in consideration of the temperature of the construction site, the purpose of using ice, cost, and the like. The radiator pipe 7 is used for cooling water in the air when the water temperature is high, and is bypassed by using valves V2 and V3.

As a measuring means, a flow meter 8, a pressure gauge 9, a temperature sensor 1
2, anemometer 13, snowfall sensor 14, radiation balance 15
Various sensors are installed to measure the information necessary for determining the control conditions, such as the outside temperature, snowfall, rainfall balance, radiation balance, and water injection amount. The radiation balance meter 15 measures the movement of heat between the sky and the ground, and is specifically the same as a heat flow meter that detects the temperature difference between two points. For example, when there is a heat transfer from the bottom to the top, a so-called "freezing" phenomenon occurs and it is easy to make ice, whereas in the opposite case, ice is easily melted, and such heat transfer is measured. These measurement data are processed by a computer, and based on the measurement information from various sensors, the temperature of the outside, the amount of snowfall, the radiation balance, the amount of water injection, the time of water injection, and the confirmation of freezing Control, etc.

The water injection nozzles 6-1 and 6-2 are movable so that the drop point of the spray water can be moved, and are composed of a plurality of combinations, and are set according to the amount of ice making. The nozzle is housed in the nozzle box 6-3. The nozzle has a shape that can diffuse water into a flat surface. And, a heater is provided to release the locally frozen portion of the pipe as needed.

In general, the amount of water injected per unit time by continuous water play work (average depth of spray water)
Is determined while verifying the required value of the cumulative coldness (cumulative value of air temperature x time) required for the sprayed water to freeze, and it can be completely frozen by controlling this amount.

Next, the operation of this system will be described.

FIG. 2 is a diagram showing a system configuration example of a measurement system control system, and FIG.
The figure is a diagram for explaining the flow of processing of the control system.

In FIG. 2, 21 is a sensor group, 22 is a measurement data processing unit, 23 is a water injection control processing unit, 24 is a condition determination setting table, and 25 is a device group. The sensor group 21 includes a flow meter 8, a pressure gauge 9, a temperature sensor 12, and an anemometer 1 shown in FIG.
3, a snowfall sensor 14, various sensors such as a radiation balance meter 15, and instruments, and a measurement data processing unit 22.
Is to perform processing such as amplification and A / D conversion so that these measurement data can be captured and processed. The water injection control processing unit 23 monitors the sensor group 21 through the measurement data processing unit 22, refers to the condition determination setting table 24, determines the water injection control condition and the like, sets control parameters, and controls the device group 25. The device group 25 includes pumps, valves, heaters, and the like. The system including the measurement data processing unit 22, the water injection control processing unit 23, and the condition determination setting table 24 can of course be configured by a computer, and FIG. 3 shows the flow of the processing.

The flow of processing will be described with reference to FIG.

~ First, turn on the power to the control system, input the operating month, day, and time to start the ice making control program. As a general rule, the ice making operation is performed at night from sunset time to sunrise time on the next day, and each time is set according to a calendar day.

〜 、 〜 In automatic driving, the data of snowfall sensor, rain gauge, outside air temperature sensor, etc. are taken in to grasp the precipitation situation. Then, when it is raining, it is checked whether the outside air temperature is −2 ° C. or lower. If it is −2 ° C. or lower, the water injection operation is terminated in the snowfall mode, and when the water injection start designated time has passed, water injection for the previous day is performed. The process shifts to the freezing confirmation process () in (), but when the specified time for starting water injection has not passed, the process of grasping the precipitation situation ()
Return to. When the outside air temperature is not below -2 ° C, the system is on standby because it is raining.

~, When it is not raining, the water injection time is judged based on the sunset time data, etc. according to the history, and at the water injection start time, the average input water depth of the previous day, the accumulated cold degree from the afternoon of the previous day,
From the average wind speed and radiation balance, check the freezing of the previous day's water injection,
If there is no freezing, check whether it is raining. Then, if it is raining, the process returns to the process () for determining whether the outside air temperature is −2 ° C. or less, and if it is not raining, the process returns to the freezing confirmation process ().

~ If it is frozen, check whether the air temperature is -4 ° C or less, and if it is -4 ° C or less, -6 ° C or less, or if the temperature is decreasing, outside temperature, wind speed, wind direction, use Parameters are set according to external conditions such as nozzle, flow velocity, water pressure, etc., and water injection conditions are set / changed. Basically, water injection is performed within the range where ice is surely formed. Then, according to this water injection condition, the pump and the nozzle box heater are turned on and the water injection system is operated until the water injection completion time comes. here,
As the water injection completion time, for example, the sunrise time according to the calendar day is set.

~ For example, if the temperature is not below -4 ℃,
Or, if the temperature is not falling between -4 ℃ and -6 ℃, check whether it is snowing or not. If it is not snowing, stop the pump, and if it is snowing, end the water injection operation for snowfall mode. Let And if it is the end within the water injection completion time, the temperature is −
The process returns to the process () for determining whether or not the temperature is 4 ° C. or lower, and the process returns to the process () for grasping the precipitation condition unless the water injection is completed within the time.

The snowfall mode determines whether or not it is snowing regardless of time and starts operation. In this case, when the snowfall mode end time comes to the designated water injection time zone, the process returns to the previous day's water injection ice formation confirmation process (), and otherwise returns to the precipitation status grasping process (). When the snowfall mode is entered within the precipitation time zone, the process returns to the determination process of whether or not the temperature is -4 ° C or lower on the assumption that it does not change to rain on the way.

As described above, the water injection for the snowfall mode is carried out in order to prevent the snow containing a large amount of air and having a good heat insulating property from being accumulated on the ice, and therefore it is operated depending on whether or not the snow is falling. Then, even while water injection for snowfall mode is being carried out, it is repeatedly verified with the specified time until the specified time for water injection is reached, and when the specified time for water injection is reached, the control is terminated in the normal temperature environment after the water injection for snowfall mode is completed. Give priority to the original process.

In the water injection operation, the pump pressure and the movement speed of the nozzle box are controlled according to the weather conditions, etc., and the nozzle box is turned on before the start of water injection, and the temperature is 0 ° C during the water injection target time.
It is warmed up to be above.

Note that the numerical values of the temperature in the description of the processing flow show one embodiment, and are not limited.

〔The invention's effect〕

As is clear from the above description, according to the present invention, an ice pond can be set adjacent to a facility requiring a cold heat source, and transportation costs can be saved. Further, since the water is poured while moving the nozzle, it is possible to uniformly pour the water in a plane, and to make the ice pool evenly freeze, and to efficiently manufacture and store a large amount of ice blocks. In the method of collecting water and making ice cubes by cold air, there is a limitation in thickening the ice, but the present invention raises the ice from the bottom rather than freezing it after collecting water, so the area of the ice pound is It can also be reduced. Moreover, since it is a heaping method, there is no danger as in the conventional method of cutting out natural ice such as lakes and marshes.

In addition, it is sprayed and air-cooled according to the same principle as the cooling tower to produce ice in a supercooled state using natural cold air, so it is much more running than using a refrigerator just by using the drive power of the spray pump. The cost can be reduced.

Further, even in an area where the amount of snowfall is small, the present invention does not have the problems of the conventional method, and the cost can be reduced.

As described above, the present invention detects the parameters such as the outside air temperature, the wind speed, the amount of solar radiation, the amount of snowfall, etc., selects the spray nozzle that is suitable for the amount of water per time to be sprayed, sprays water, and changes the parameters. Depending on the control program, the nozzle size is changed and the cold climate is used to cool the water to make ice blocks, so the initial cost and running cost are reduced, and a large amount of ice blocks are efficiently manufactured while ensuring safety. It can be stored and stored.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system configuration diagram for explaining one embodiment of an ice lump manufacturing method according to the present invention, FIG. 2 is a diagram showing an example of the system configuration of a measurement system control system, and FIG. FIG. 6 is a diagram for explaining the flow of processing of the control system. 1 ... Ice pond, 2 ... waterproof sheet, 3 ... insulation material, 4 ... hollow pipe, 5 ... gravel, 6-1 and 6-2 ...
... Nozzle, 6-3 ... Nozzle box, 7 ... Radiator pipe, 8 ... Flow meter, 9 ... Pressure gauge, 10 ... Pump, 11 ... Water tank, 12 ... Temperature sensor, 13 ... Anemometer , 14 …… Snowfall sensor, 15 …… Radiation balance, V
1-V4 ... Valve.

Claims (2)

[Claims] 1. An ice lump production system for producing an ice lump by freezing ice in an ice basin having a waterproof sheet on the inside and a heat insulating material on the outside, comprising a plurality of nozzles for injecting water into the ice basin from above. Of moving means for moving the nozzle of, water injection means for supplying water from a water tank to a plurality of nozzles, measuring means for measuring the condition of the water injection system such as the meteorological environment such as outside air temperature and flow rate, and the measurement data measured by the measuring means Ice block production characterized by determining the number of nozzles to be injected by judging the water injection conditions, and providing a moving means and a control means for controlling the water injection means so as to perform water injection from the determined number of nozzles while moving the nozzles system. 2. The ice lump manufacturing system according to claim 1, wherein a radiator pipe is connected between the water tank and the nozzle as a means for cooling the water sent to the nozzle.