JP4055415B2 - Cold storage facility - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a low-temperature storage facility using natural cold energy.
[0002]
[Prior art]
A low-temperature storage facility that uses cold energy from natural ice and snow is an energy-saving storage facility because it does not require constant power for storage. As such low-temperature storage facilities, various types of storage systems have been devised, such as snow rooms (ice rooms), artificial frozen soil, ice shells, ice shelters, ice bonds, and snow (under snow) storage, and storage near freezing points. It is being put into practical use as a practical facility for storing goods.
[0003]
However, the following technical problems have been pointed out in each type of storage facility.
[0004]
[Problems to be solved by the invention]
First of all, since the facility itself is exposed to the outside air except for artificial frozen soil, the structure must be heat-insulated, and there is a problem that the volume of the storage for the entire building is small, and thermal insulation made of chemical products such as foamed plastic is used. If it is not used frequently, it is difficult to adjust the temperature in the storage, and there are concerns about the impact on the natural environment, and the construction cost is high.
[0005]
In addition, storage in ice shells or in the snow (under the snow) has no possibility of cold mold during the storage period, so there is a possibility of low-temperature mold generation. It is necessary to take measures.
[0006]
Furthermore, the storage format using artificial frozen ground, since the basic underground structure, the door to the molten timing frozen, other such time-consuming opening and closing operation industry, high-impact or the like for the stored goods due to re-condensation of meltwater The drawbacks were pointed out.
[0007]
The present invention solves the above technical problem, and the object is to increase the volume ratio of the storage to the entire building, while minimizing the use of chemical products and reducing the construction cost. Therefore, it is possible to provide a storage facility that can easily adjust the temperature in the storage, does not generate low-temperature mold due to natural circulation of cold air, and does not affect the stored product due to recondensation of molten water.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a low-temperature storage facility according to the present invention includes a metal roof part, an outer wall covering both longitudinal sides of the roof part, and a building disposed on the ground having a storage in the interior, A low-temperature storage facility in which the outside of the building except the entrance and exit portions is covered with cover soil, and the cover soil is frozen by circulating refrigerant into a soil cooling pipe piped in the cover soil. The building is made of a metal semi-cylindrical body, and the interior of the building is partitioned by a partition into a storage for storing stored items and an ice room for storing ice, and between the storage and the ice room, a hot air blowing pipe and a cold air blowing Communicating through a pipe, the entrance portion is provided at the front of the building,
The warm air blowing pipe passes through the partition wall and opens one end just below the top zenith of the ceiling at the rear of the storage room, and opens the other end directly below the top zenith of the ceiling at the rear of the ice chamber, while the cold air blowing pipe is One end is opened directly below the top of the ceiling on the front side of the storage, penetrating through the partition wall, and the other end is opened at a position closer to the side wall than the opening position of the warm air blowing pipe at the lower part of the front part of the ice chamber. Thus, it is configured such that the natural circulation of the cold air corresponding to the temperature difference between the storage and the ice chamber is performed . Therefore, in the present invention, since the roof portion that occupies the majority of the building is made of metal, the cold heat of the frozen cover soil is transmitted into the building, so the internal storage capacity of ice for cooling can be reduced, and the entire building The volume ratio of the storage can be increased, and the cover soil functions as a heat insulating material, so that chemical products are not frequently used for heat insulation, and the construction cost can be reduced accordingly. In addition, air constantly circulates constantly between the ice chamber and the storage, thereby suppressing generation of low temperature mold due to air stagnation.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 6 show a low-temperature storage facility according to the present invention. In the figure, this storage facility is constructed on a flat ground or an inclined ground. The bottom plate 2 made of concrete and the side plates 3 raised on both sides of the bottom plate 2 and the two side plates 3 are covered with the storage plate. A semi-cylindrical building 1 comprising a semi-cylindrical roof portion 4 covering the upper part and concrete outer walls 5 and 6 covering both sides in the longitudinal direction is provided.
[0014]
The roof portion 4 is composed of, for example, a half-divided body of a large-diameter metal corrugated tube. After the roof portion 4 is constructed, the entire building is covered with a cover soil 7 while leaving a front partition wall 5 serving as an entrance. Thus, the covering soil 7 is made to function as a heat insulating material by burying the entire building 1 in the ground.
[0015]
Further, in the cover soil 7 surrounding the periphery of the building 1, underground cooling pipes 13 are preliminarily embedded in multiple stages, and both ends thereof are exposed around the front surface of the building 1.
[0016]
Then, at the start of use of the facility, each cooling pipe 13 is connected to a refrigerator (not shown), and the cover soil 7 is frozen by circulating a refrigerant therein, and the entire periphery of the building 1 is cooled by this artificial frozen soil, which will be described later. The internal storage capacity of ice is reduced to reduce the volume.
[0017]
In addition, 4a in a figure is a water-permeable layer which consists of a nonwoven fabric etc., for example. By arranging the water permeable layer 4a in an inclined manner, it is possible to remove excess rainwater that permeates the cover soil 7 from the surroundings of the building 1 and prevent the frozen soil from being melted.
[0018]
The inside of the building 1 is divided into three in the longitudinal direction by partition walls 8 and 9. Among these, the front part is the preparation chamber 10, the middle part having the maximum volume is the storage 11, the rear part is the ice compartment 12, and each partition 8, together with the door 14 arranged on the front outer wall 5, The doors 15 and 16 provided at 9 communicate with each other and between the inside and outside of the building 1.
[0019]
In addition, the doors 14 and 15 provided in the outer wall 5 and the partition 8 are cold insulation doors, and the door 16 provided in the partition 9 that partitions the storage 11 and the ice compartment 12 is a normal door.
[0020]
In the center of the floor of the storage 11, a latent heat water tank 17 that is one step lower than this is formed, and the latent heat water tank 17 stores a predetermined amount of water. In addition, when storing stored goods, such as fresh foodstuffs, in the store | warehouse | chamber 11, what is necessary is just to span several latent joists across the latent-heat tank 17 and to install on this joist.
[0021]
A plurality of ice trays 18 are arranged in the ice chamber 12, and the above-mentioned cooling ice is stored in each ice tray 18. As shown in FIG. 4, the ice tray 18 is symmetric throughout the ice chamber 12 and is stacked in multiple stages along the curved surface of the roof portion 4, and square members are arranged between the ice trays 18 to provide a gap. As a result, the ice trays 18 occupy most of the ice chambers 12, thereby ensuring a sufficient heat exchange area.
[0022]
As shown in the enlarged view of a part of FIG. 4, each ice tray 18 has a structure in which a container side plate 18 b made of precast concrete is disposed between upper and lower square members 18 a and fixed with angle iron 18 c, and the bottom plate is a steel plate. It is comprised by 18d, The watertightness is maintained by covering the inner side with the vinyl sheet 18e.
[0023]
As shown in FIG. 5, the ice chamber 12 and the storage 11 pass through the partition wall 9 on the upper side and communicate with each other via a pair of left and right warm air blow pipes 19 and cold air blow pipes 20. The warm air blow pipe 19 communicates the portion directly below the ceiling at the rear portion of the storage 11 and the portion directly below the ceiling of the ice chamber 12, and the warm air that has been heated and expanded in the storage 11 due to the pressure difference between the two chambers, as indicated by the arrows. It is sent to the ice chamber 12 through the blower pipe 19 and comes into contact with the ice to cause a downdraft and descends while taking heat away.
[0024]
The cold air blow pipe 20 is started up from the lower side of the ice chamber 12 and is turned right below the ceiling surface on the storage 11 side, and is opened to the front side of the storage 11, so that the cold air in the ice chamber 12 has an atmospheric pressure difference. Accordingly, it enters the storage 11 through the pipe 20 , generates a downdraft according to the temperature difference at the outlet end of the pipe 20 , and descends while taking away the surrounding heat.
[0025]
As described above, natural circulation of cold air is always performed between the storage 11 and the ice chamber 12 according to the temperature difference, thereby preventing generation of low temperature mold due to air stagnation.
[0026]
Also, the ice chamber 12 and the outside air can be circulated. FIG. 6 shows an example of this. A pair of opening / closing dampers 21 is provided on the upper portion of the front outer wall 5 (see FIG. 3A). Is made to communicate with the outside air by being positioned opposite to the damper 21. Further, on the exhaust side, the temperature difference between the outside air and the ice chamber 12 is established by extending the cold air blowing pipe 20 and penetrating the partition wall 8 so as to face the damper 21 so that the inside of the ice chamber 12 communicates with the outside air. Natural circulation is made according to the situation.
[0027]
The above pipes are connected to an external freezing circuit or the like for the purpose of freezing water stretched in the ice tray 18 at the start of use of the facility, and cool air is circulated. It is carried out for the purpose of taking in and freezing only the ice in the ice chamber 12 and not freezing the inside of the storage chamber 11.
[0028]
In the above embodiment, the bottom plate 2, the side plate 3, the outer walls 5 and 6 constituting the building 1 are described as being made of concrete, but these are C (concrete) and SC (steel concrete). , RC structure (steel reinforced concrete structure), SRC structure (steel reinforced concrete structure), or any combination thereof, and other than the outer wall 5 in contact with the outside air may be made of steel. .
[0029]
In this embodiment, the pipes 19 and 20 are extended to allow natural circulation between the outside air and the ice compartment. However, pipes for inside air circulation and outside air circulation may be provided separately, or branch pipes may be provided. Of course, it is possible to provide a valve mechanism attached thereto and switch between the inside air circulation and the outside air circulation by opening and closing the shutter of the damper 12 and switching the valve.
[0030]
【The invention's effect】
As is clear from the above description, the low-temperature storage facility according to the present invention can increase the volume ratio of the storage of the entire building, minimize the use of chemical products, reduce the construction cost, Low temperature mold does not occur due to natural circulation.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional perspective view of a low-temperature storage facility according to the present invention.
FIG. 2 is a transverse sectional view and a longitudinal sectional view of the same.
3A to 3C are front views of A, B, and C views in FIG.
FIGS. 4A and 4B are a front view and a side sectional view showing the configuration of the ice compartment.
FIGS. 5A and 5B are a front view and a side cross-sectional view showing piping for air circulation between the storage and the ice compartment. FIGS.
FIGS. 6A and 6B are a front view and a side sectional view showing piping for air circulation between the outside and the ice chamber. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Building 2 Bottom plate 3 Side plate 4 Roof part 5, 6 Outer wall 7 Cover soil 8, 9 Bulkhead 10 Preparation room 11 Storage room 12 Ice room 13 Subsurface cooling pipe 17 Submerged water tank 18 Ice tray 19 Warm air ventilation pipe 20 Cold air ventilation pipe

Claims (1)

A metal roof and an outer wall covering both sides in the longitudinal direction of the roof, and a building disposed on the ground having a storage in the interior, and the outside excluding the entrance / exit portion of the building is covered with covering soil, A low-temperature storage facility formed by freezing the cover soil by circulating a refrigerant in a soil cooling pipe piped in the cover soil ,
The roof portion is made of a metal semi-cylindrical body,
The interior of the building is partitioned into a storage for storing stored items by a partition wall and an ice chamber for storing ice, and the storage and the ice chamber are communicated with each other via a warm air pipe and a cold air pipe. The entrance portion is provided at the front of the building,
The warm air blowing pipe passes through the partition wall and opens one end just below the top zenith of the ceiling at the rear of the storage room, and opens the other end directly below the top zenith of the ceiling at the rear of the ice chamber, while the cold air blowing pipe is One end is opened directly below the top of the ceiling on the front side of the storage, penetrating through the partition wall, and the other end is opened at a position closer to the side wall than the opening position of the warm air blowing pipe at the lower part of the front part of the ice chamber. Thus, the low-temperature storage facility is configured such that natural circulation of cold air corresponding to the temperature difference between the storage and the ice chamber is performed .

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