JPH10311653A - Cold storage warehouse - Google Patents

Abstract

(57) [Summary] [Purpose] A low-temperature storage warehouse capable of reducing the construction cost by simplifying the configuration of an ice room for accumulating and storing ice or snow, and improving the airtightness of the ice room by improving the airtightness of the ice room. I will provide a. An ice-snow chamber in which a porous wall is provided concentrically with a side wall of a cylindrical silo provided with a side wall of a heat insulating structure, and an inner space of the porous wall is filled with ice or snow. 1
1, a space formed by the side wall 7 and the perforated wall 10 is formed in a heat exchange air passage 12, and a freezing ice maker 13 is provided at a ceiling of the ice and snow room 11, and a water storage is provided at a bottom of the ice and snow room 11. Tanks 14 are provided, respectively, and the heat exchange air passage 12 is connected to the storage 3 provided in a separate building from the cylindrical silo 2 via heat exchange pipes 18 and 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-temperature storage warehouse which is most suitable for preservation of agricultural products, foods and the like by cooling.

[0002]

2. Description of the Related Art Conventionally, agricultural products and the like are stored in an ice room in which natural ice or snow is deposited and stored in a storage room communicating with the ice room, and the degree of opening and closing of a shutter that partitions a communicating portion between the storage room and the ice room is stored. By changing according to the indoor temperature,
Japanese Patent Publication No. 3-61110 discloses an insulated storage room for agricultural products and the like to be taken into the storage room while appropriately adjusting the amount of cold air in the ice room. Since this type does not use electric energy, there is an advantage that equipment costs and running costs are reduced. However, this cold storage is
It is used only in areas where significant snowfall is expected to secure a source of cold in summer. In addition, when a warm winter occurs due to a change in climate or the like, there is a disadvantage that the amount of snow is small and a cold heat source cannot be secured.

In order to solve this problem, Japanese Patent Laid-Open Publication No.
No. 36576 discloses that an ice maker is provided in a sky part in a storage having a heat insulating layer in the periphery, an ice receiving plate is disposed immediately below the ice maker, and the sliding ice blocks are stored in an ice storage basket. An ice temperature storage warehouse capable of storing cold at low cost is disclosed.

[0004]

However, the former cold storage warehouse, in which natural ice or snow is deposited and stored, and the latter, an ice temperature storage warehouse in which an ice maker is installed in the storage, are both constructed on a foundation concrete or the like. An iron plate or galvanized steel is stretched in the completed building, and a heat insulating material such as urethane foam is adhered on the iron plate or galvanized steel. For this reason, the building process is complicated because a building is built on site,
There was a disadvantage that the construction cost was high. In addition, in a built-in type ice room, there is a drawback that heat insulation is inferior as well as airtightness.

SUMMARY OF THE INVENTION In view of the above problems, the present invention can reduce the construction cost by simplifying the configuration of an ice room for storing and storing ice or snow, and can improve the hermeticity of the ice room and improve the heat insulation. It is a technical task to provide a cold storage warehouse.

[0006]

To solve the above problems, the present invention provides a cylindrical silo provided with a side wall of a heat insulating structure.
A perforated wall is provided concentrically with the side wall, and the space formed by the side wall and the perforated wall is used as a heat exchange air passage, and the space formed by the side wall and the perforated wall is used as a heat exchange air passage. A freezing ice maker for dropping ice-making ice blocks into the ice and snow room at the ceiling of the ice and snow room, and a water tank for recovering ice melt from the ice and snow room at the bottom of the ice and snow room. A water supply pipe is connected between the water storage tank and the frozen ice maker to pump the ice block melted water into the frozen ice maker and make ice, and the heat exchange air path is provided in a separate building from the cylindrical silo. The technical measures were taken to connect the storage to the storage via a heat exchange pipe.

[0007]

FIG. 1 is a longitudinal sectional view showing one embodiment of a low-temperature storage warehouse according to the present invention, FIG. 2 is a sectional view showing a heat insulating structure of a silo side wall, and FIG. FIG. 4 is a sectional view showing another embodiment of the heat insulating structure of the side wall, and FIG.
FIG. 5 is a transverse cross-sectional view taken along line AA of FIG. 5, and FIG. 5 is a perspective view of a cylindrical silo according to the present invention, with a part cut away to show the outline thereof.

In FIG. 1, a cold storage warehouse 1 according to the present invention is shown.
Is constructed on a foundation concrete t laid on the ground s, and is composed of a cylindrical silo 2 having a heat insulating structure for accumulating and storing snow or ice, and a storage 3 for storing agricultural products, foods and the like at a low temperature. . The cylindrical silo 2 is a conventional silo made of a steel plate which is conventionally known. The silo is generally used for storing grain or the like, but is modified in the present invention to store snow or ice. Next, the heat insulating structure of the silo 2 is shown in FIG.
And FIG. FIG. 2 is a cross-sectional view of a side wall of a silo made of a rope, and a rope 4 (for example, having a thickness of 4 mm) made of iron or the like.
) Is stretched in a cylindrical shape, and urethane foam or the like is adhered to the outer periphery as the heat insulating material 5. Further, a rope plate 6 as an outer wall is stretched from above to form a side wall 7 of a heat insulating structure. FIG. 3 is a cross-sectional view showing another embodiment of the heat insulating structure. A steel plate 4 made of iron or the like is stretched in a cylindrical shape, and a heat insulating material 5 is attached to the outer periphery thereof. Then, a gap is provided to form an air layer 8, and a rope plate 6 as an outer wall is stretched from above. Thereby, the heat insulation efficiency is remarkably improved as compared with that shown in FIG. These heat insulating structures can be applied not only to the side wall 7 but also to the ceiling 9.

In addition, the modified points of the cylindrical silo 2 are as follows. That is, in the cylindrical silo 2, a porous wall 10 concentric with the side wall 7 (for example, “expanded metal” (a mesh plate expanded by cutting a steel plate) is used as the porous wall). Stretched and silo 2
An inner space partitioned by the inner perforated wall 10 is formed in an ice / snow chamber 11 for accumulating and storing ice or snow, and a space formed by the side wall 7 and the perforated wall 10 is formed in a heat exchange air passage 12. A frozen ice maker 13 is provided on the ceiling of the ice and snow room 11 so that ice blocks h made with tap water or the like fall into the ice and snow room 9. In addition, a water storage tank 14 for recovering melted ice blocks is provided under the ice and snow chamber 11 underground. A pump 15 is installed in the water storage tank 14, and the pump 15 is
The discharge side 17 is connected to the freezer 13 via a water supply line 16. Then, the melted water stored in the water storage tank 14 is pumped up to the frozen ice maker 13 and circulated to make ice.

The heat exchange air passage 12 connects a heat exchange pipe to ventilate a storage 3 built in a building separate from the silo 2. That is, heat exchange pipes 18 a and 18 for sucking heated air from the storage 3 are provided above the heat exchange air passage 12.
b is connected. Further, a cool air storage tank 19 is provided below the heat exchange air passage 12, and the cool air storage tank 19 is connected to a heat exchange pipe 20 that supplies cool air to the storage 3. The heat exchange pipe 20 is provided with an outside air intake duct 21 for taking in outside air and a switching valve 22, and it is possible to mix cold air and outside air to produce air at an arbitrary temperature and to supply the air to the storage 3. A suction fan 23 is interposed in the heat exchange pipe 18, and a blower fan 24 is interposed in the heat exchange pipe 20.

The storage 3 has a side wall 34, a roof portion 35, and a bottom portion 36 formed by the above-described wall of the heat insulating structure, and a part of the side wall 34 is provided with a door 37 for storing agricultural products, foods, and the like. . A temperature sensor 25 and a humidity sensor 26 are installed in the refrigerator, and the suction fan 23, the blower fan 24, and the switching valve 2 are controlled by a control device (not shown).
2, the interior of the storage 3 can be air-conditioned to the set temperature.

Hereinafter, the operation of the low-temperature storage warehouse in the above configuration will be described. First, a desired amount of snow or ice blocks h is deposited and accommodated in the ice / snow chamber 11 in the cylindrical silo 2 having the heat insulating structure. Here, as snow or ice h, natural snow or ice obtained by snow accumulation or freezing can be used. If natural snow or ice is insufficient due to summer or warm winter, the frozen ice maker 1
3 may be operated to accumulate and store a desired amount of snow or ice blocks h made from tap water or the like. When driving the freezing ice maker 13, it is preferable to use the power at midnight, and the amount of cold energy consumed in the daytime due to the ice making at midnight is supplemented, and thereafter, the operation may be switched to circulation ice making.

The amount of cold energy consumed is determined by many parameters such as the outside air temperature, the surface area of the snow or ice block h, the temperature of the cool air to be sent to the storage 3, the wind speed, and the wind volume. For this reason, an amount of snow or ice h required for cooling and preserving agricultural products, foods, and the like is previously deposited by calculation. The room temperature in the storage 3 is affected by the outside air temperature and the amount of respiratory heat of agricultural products and foods. The temperature in the storage 3 is detected by a temperature sensor 25, and the humidity is detected by a humidity sensor 26. These temperature sensor 25 and humidity sensor 26 are sent to a control device (not shown).

In the control device, a temperature range and a humidity range suitable for agricultural products, foods, etc. are set in advance. When the temperature detected by the temperature sensor 25 in the storage 3 becomes higher than the set temperature range, the suction fan 23 and the blower By driving the fan 24, the switching valve 22 is driven in a direction to close the outside air intake duct 21. Thereby, the heated air in the storage 3 is sucked from the heat exchange pipe 18 and guided to the heat exchange air passage 12 in the cylindrical silo 2. At this time, heat exchange wind path 1
The air inside 2 is cooled by exchanging heat with snow or ice blocks h accumulated and stored in the ice and snow room 11, and then returns to the storage 3 through the cool air storage tank 19 to the blower blower 24 interposed in the heat exchange pipe 20.

In this way, when the room temperature in the storage 3 drops and the temperature detected by the temperature sensor 25 returns to within the set temperature range, the suction fan 23 and the blowing fan 24
Is stopped. Thereby, the inside of the storage 3 can be kept cool, for example, at 0 ° C. to 5 ° C.

The humidity control according to the type of agricultural products, foods, etc. is performed as follows. When the humidity detected by the humidity sensor 26 becomes higher than the set humidity range, the switching valve 22 is opened so as to open the outside air intake duct 21, and the outside air that has been dried to a certain extent and the high humidity cold air are mixed so that the set humidity range is reached. Humidity control. Conversely, when the humidity detected by the humidity sensor 26 becomes lower than the set humidity range, the outside air intake duct 21 is closed and the heat exchange air passage 12 is closed.
The humidity in the storage 3 is increased by taking in the high-humidity cold air in the interior. If the humidity does not fall within the set humidity range even after the above humidity control, the humidity controller 28 installed in the storage 3 is driven to adjust the humidity to the set humidity.

When the melting of the snow or ice h in the ice and snow chamber 11 progresses and overflows, it flows into the water storage tank 14 through the cold air storage tank 19. Is done.
Reference numeral 27 denotes a water purification pipe connected to the water supply conduit 16, which is used for replenishment when the amount of water for ice making becomes insufficient.

Further, when the cooling capacity is insufficient, a heat exchanger 29 using molten cold water can be provided in the storage 3. That is, the heat exchange pipe 3
It is preferable to provide a heat exchanger 29 composed of a fan 0 and a blower fan 31, and to provide a water supply pipe 32 through which the molten cold water in the water storage tank 14 flows through the heat exchange pipe 30. The water supply line 32 may be provided with a water pump 33 for pumping the molten cold water. Thus, the heated air in the storage 3 exchanges heat with the heat exchange pipe 30 and is cooled.

[0019]

As described above, according to the low-temperature storage warehouse of the present invention, the porous wall is provided concentrically with the side wall in the cylindrical silo provided with the side wall of the heat insulating structure. An inner space is formed in an ice / snow room for storing ice or snow, a space formed by the side wall and the porous wall is formed in a heat exchange wind path, and a freezing ice maker is provided on a ceiling portion of the ice / snow room. The ice blocks that have been made are dropped into the ice and snow chamber, and a water tank is provided at the bottom of the ice and snow chamber to collect ice melt from the ice and snow chamber. Since a water supply pipe was connected between the water storage tank and the frozen icemaker, and the heat exchange air passage was connected to a storage provided in a separate building from the cylindrical silo via a heat exchange pipe,
When a new low-temperature storage is constructed, a conventional cylindrical silo used for a country elevator or the like may be converted into an ice and snow room, so that the construction process can be simplified and the construction cost can be reduced. Further, when renovating an old cold storage that is old, it can be converted into a low-temperature storage warehouse that has both a cold heat source using electric energy and a cold heat source using natural snow and ice. Furthermore, since it is an ice room using a cylindrical silo, it has become possible to improve the airtightness and the heat insulation as compared with a building type ice room.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a low-temperature storage warehouse of the present invention.

FIG. 2 is a sectional view showing a heat insulating structure of a silo side wall.

FIG. 3 is a sectional view showing another embodiment of the heat insulating structure of the silo side wall.

FIG. 4 is a cross-sectional view taken along line AA of FIG.

FIG. 5 is a partially cutaway perspective view schematically showing a cylindrical silo of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature storage warehouse 2 Cylindrical silo 3 Storage 4 Rope 5 Insulation material 6 Rope 7 Side wall 8 Air layer 9 Ceiling part 10 Perforated wall 11 Ice and snow room 12 Heat exchange wind path 13 Refrigeration ice maker 14 Storage tank 15 Pumping pump 16 Water supply Pipe 17 Discharge side 18 Heat exchange pipe 19 Cold air storage tank 20 Heat exchange pipe 21 External air intake duct 22 Switching valve 23 Suction fan 24 Ventilation blower 25 Temperature sensor 26 Humidity sensor 27 Water purification pipe 28 Humidity controller 29 Heat exchanger 30 Heat exchange Pipe 31 Blower fan 32 Water supply pipe 33 Pumping pump 34 Side wall 35 Roof 36 Bottom part 37 Door

Claims (1)

[Claims] A porous wall is provided concentrically with said side wall in a cylindrical silo provided with a side wall of a heat insulating structure, and an inner space of said porous wall is placed in an ice / snow room for storing ice or snow. A space formed by a side wall and the porous wall is formed in a heat exchange wind path, and a frozen ice maker for dropping ice-made ice blocks into the ice and snow room is provided at the ceiling of the ice and snow room, and ice and snow is provided at the bottom of the ice and snow room. Water tanks are provided to collect the ice melt from the room.
A water supply pipe is connected between the water storage tank and the frozen ice maker so as to pump ice melt from the water storage tank to the frozen ice maker to make ice, and the heat exchange air path is connected to the cylindrical silo. A low-temperature storage warehouse that is connected to a storage in a separate building via a heat exchange pipe.