JP7137890B1 - Agricultural product storage system and agricultural product storage method - Google Patents

Abstract

An agricultural product storage system capable of cooling storage by efficiently utilizing cold heat such as snow and ice is provided. A first storage chamber (7) capable of storing a plurality of containers (39) for storing agricultural products; a second storage chamber (11) disposed facing the first storage chamber (7) and capable of storing a plurality of containers (39); Doors 37 and 47 that connect the first storage chamber 7 and the second storage chamber 11 when opened and partition the first storage chamber 7 and the second storage chamber 11 when closed, and the second storage chamber of the first storage chamber 7 A first fan 17 installed in the first pressure chamber 5 arranged on the opposite side of the fan 11 and sucking air in the first pressure chamber 5 and discharging it to the first storage chamber 7 , and a first fan 17 in the second storage chamber 11 . A second fan 61 installed in the second pressure chamber 13 installed on the opposite side of the storage chamber 7 and sucking the air in the second storage chamber 11 and discharging it into the second pressure chamber 13, and the walls of the doors 37 and 47 It has a duct 31 penetrating through the portions 49 and 51 and connecting the first pressure chamber 5 and the second pressure chamber 13 , and open/close lids 35 and 77 for opening or closing the duct 31 . [Selection drawing] Fig. 1

Description

The present invention relates to an agricultural product storage system and an agricultural product storage method for storing agricultural products.

From the viewpoint of greenhouse gas emission regulations and energy saving, there is a demand for a system that can store agricultural products inexpensively for a long period of time with little energy. Agriculture in northern countries can only produce crops once a year, but they enjoy the advantage of being able to cool and store agricultural products such as potatoes and onions harvested in autumn until the following spring, using the cold winter air. However, after next spring, when the outdoor temperature rises and it becomes impossible to cool the crops, if the crops are to be stored for a longer period of time, they must be cooled and stored using a refrigerator or the like. Therefore, attempts have been made to cool and store the snow and ice, which are abundantly available during the winter, for the following spring and beyond.

For example, Patent Literature 1 describes a storage method for year-round storage of potatoes. In this storage method, the same storage facility has two rooms for storing potatoes. In winter, the temperature of the potatoes in the two rooms is lowered by cold air circulation that introduces outside air. Another room is cooled by natural convection.

JP 2015-112103 A

In the above-described prior art, since the cold air of snow and ice is moved by natural convection, the convection of the cold air is insufficient and the potatoes cannot be sufficiently cooled.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an agricultural product storage system and an agricultural product storage method that can efficiently utilize cold energy such as snow and ice for cooling storage.

In order to achieve the above object, the agricultural product storage system of the present invention includes a first chamber capable of storing a plurality of first containers for storing agricultural products; a second chamber capable of storing a plurality of second containers; an opening/closing portion that communicates the first chamber and the second chamber when opened and partitions the first chamber and the second chamber when closed; a first fan installed in a third chamber arranged on the opposite side of the second chamber of one chamber to suck air from the third chamber and discharge the air to the first chamber; A second fan installed in a fourth chamber installed on the opposite side of the first chamber to draw air from the second chamber and discharge it to the fourth chamber; It has a duct that communicates with the fourth chamber, and an opening/closing lid that opens or closes the duct.

Further, in order to achieve the above object, in the agricultural product storage method of the present invention, when partitioning the first and second chambers that are arranged facing each other, a plurality of first containers containing agricultural products are stored in the first container. While storing in one chamber, a plurality of second containers containing the agricultural products are stored in the second chamber, and the air in the third chamber arranged on the opposite side of the first chamber to the second chamber is sucked. The air in the first chamber is circulated by discharging the air in the first chamber and ventilating the air in the first chamber to the third chamber. The air in the second chamber is circulated by discharging the air in the fourth chamber installed on the opposite side of the first chamber and ventilating the air in the fourth chamber to the second chamber. When communicating with two chambers, a plurality of said first containers containing snow or ice are stored in said first chamber, and a plurality of said second containers containing said agricultural products are stored in said second chamber. Then, the air in the third chamber is sucked and discharged into the first chamber, the air in the second chamber is sucked and discharged into the fourth chamber, and the air in the fourth chamber is ventilated into the third chamber. Thus, the air in the first chamber and the second chamber is circulated.

In the present invention, agricultural products harvested in autumn are stored in the first and second compartments. Until the following spring, when the temperature of the outside air is low, the opening/closing part is closed to separate the first and second chambers, and the air in the first and second chambers is circulated separately. Specifically, in the first chamber, the first fan sucks in the air in the third chamber and discharges it into the first chamber, and the air in the first chamber is ventilated into the third chamber, thereby blowing the air in the first chamber. Circulate. In the second chamber, the air in the second chamber is circulated by sucking the air in the second chamber by the second fan and discharging it into the fourth chamber, and ventilating the air in the fourth chamber to the second chamber. In the individual circulation of the first chamber and the second chamber, outside air is appropriately introduced and circulated in each of the first chamber and the second chamber. In this way, agricultural products harvested in autumn can be cooled and stored until next spring using the cold outside air of winter.

The stored agricultural products are shipped sequentially from the first compartment, the first compartment is emptied by the next spring, and then containers containing ice and snow are loaded into the first compartment. In the first chamber, the outside air is used by individual circulation to cool the snow and ice so that they do not melt until the outside temperature rises, and they are preserved so as not to reduce their value as cold energy resources.

After spring, when the outside air temperature rises and the cold heat from the outside air can no longer be used, the opening/closing part is opened to allow communication between the first and second chambers, thereby circulating the air in the entire first and second chambers. Let Specifically, the first fan draws in air from the third chamber and discharges it to the first chamber, the second fan draws in air from the second chamber and discharges it to the fourth chamber, and ducts the air from the fourth chamber. The air in the entire first and second chambers is circulated by ventilating the third chamber through the . This allows the produce stored in the second compartment to be cooled by air cooled by snow or ice as it passes through the first compartment. At this time, since the first fan blows air into one of the first chambers and the second fan draws in the air into the other second chamber, a sufficient amount of cold air can be convected. Moreover, since the air is circulated using the duct, it is possible to prevent the air cooled in the first chamber from being mixed with the air warmed by heat exchange with the agricultural products in the second chamber. Therefore, the produce can be sufficiently cooled. In this way, it is possible to use the space vacated by shipping as a storage space for snow, ice, etc., and to efficiently utilize the cold energy, so that the agricultural products can be continuously stored in the cold even after spring.

ADVANTAGE OF THE INVENTION According to this invention, cold storage of agricultural products can be carried out efficiently using cold heat, such as snow and ice.

1 is a perspective view showing an example of the overall structure when individually circulating the agricultural product storage system according to the embodiment; FIG. 1 is a side cross-sectional view from the front showing an example of the overall structure when individually circulating the produce storage system according to the embodiment; FIG. 1 is a horizontal cross-sectional view from above showing an example of the overall structure when individual circulation is performed in the agricultural product storage system according to the embodiment; FIG. 1 is a perspective view showing an example of the overall structure when circulating the agricultural product storage system according to the embodiment; FIG. 1 is a side cross-sectional view from the front showing an example of the overall structure when the agricultural product storage system according to the embodiment is circulated as a whole. FIG. FIG. 2 is a horizontal cross-sectional view from above showing an example of the overall structure when the agricultural product storage system according to the embodiment is circulated as a whole. 1 is a perspective view showing an example of the structure of a container used in a produce storage system; FIG.

An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an example of the overall configuration when the agricultural product storage system according to the present embodiment is individually circulated, and FIGS. An example of the overall configuration of 1 and 4 are perspective views seen from above obliquely right front, FIGS. 2 and 5 are side cross-sectional views from the front, and FIGS. 3 and 6 are horizontal cross-sectional views from above. Moreover, FIG. 7 is a perspective view showing an example of the overall configuration of a container used in the agricultural product storage system. In the following description, up/down, front/rear, and left/right directions correspond to the directions of the arrows shown in FIGS. 1 to 7. FIG. These orientations are used for convenience of explanation and are not intended to limit the orientation or placement of each component of the produce storage system or container.

<Overall configuration of agricultural product storage system>
As shown in FIGS. 1-6, the produce storage system 1 has a building 3 . The building 3 has a front wall 3F, a rear wall 3B, a left wall 3L, a right wall 3R, and a ceiling 3U. 1 and 4, illustration of the front wall 3F and the ceiling 3U is omitted in order to illustrate the internal structure of the building 3. As shown in FIG. The agricultural product storage system 1 has a first pressure chamber 5 , a first storage chamber 7 , an intermediate chamber 9 , a second storage chamber 11 , and a second pressure chamber 13 in order from the right side in the horizontal direction in the building 3 . The first storage chamber 7 is an example of the first chamber, the second storage chamber 11 is an example of the second chamber, the first pressure chamber 5 is an example of the third chamber, and the second pressure chamber 13 is an example of the fourth chamber.

The first pressure chamber 5 is defined by a right wall 3R, a front wall 3F, a rear wall 3B and an inner wall 15. As shown in FIG. The first pressure chamber 5 is arranged on the side of the first storage chamber 7 opposite to the second storage chamber 11 , ie on the right side of the first storage chamber 7 . As shown in FIGS. 2 and 3 and FIGS. 5 and 6 , the first pressure chamber 5 is provided with a first fan 17 that draws air from the first pressure chamber 5 and discharges it to the first storage chamber 7 . ing. 2 and 5, above the first fan 17 on the right wall 3R, an intake port 19 for taking air from the outside of the building 3 into the first pressure chamber 5 and a first An exhaust port 21 is provided for discharging the air in the pressure chamber 5 to the outside of the building 3 . The intake port 19 and the exhaust port 21 are opened or closed by opening/closing lids 23 and 25, respectively.

As shown in FIGS. 1 and 2 and FIGS. 4 and 5, a substantially rectangular opening 27 is formed in the upper portion of the inner wall 15 at the center in the front-rear direction. The air in the first storage chamber 7 flows through the opening 27 into the first pressure chamber 5 . The opening 27 is opened or closed by an opening/closing lid 29 .

As shown in FIGS. 1 and 2 and FIGS. 4 and 5, the produce storage system 1 extends through a first storage chamber 7, an intermediate chamber 9, a second storage chamber 11, a first pressure chamber 5 and a second pressure chamber. It has a duct 31 communicating with the chamber 13 . The ducts 31 extend in the left-right direction, for example, at two locations on both sides in the front-rear direction in the upper part of the building 3 . As shown in FIGS. 1 and 4 , substantially circular openings 33 communicating with the duct 31 are formed at both ends in the front-rear direction of the upper portion of the inner wall 15 . The duct 31 is opened or closed by opening or closing the opening 33 with the opening/closing lid 35 . When the duct 31 is opened, the air in the second pressure chamber 13 is ventilated to the first pressure chamber 5 .

The first storage chamber 7 is partitioned by a front wall 3F, a rear wall 3B, an inner wall 15 and a door 37. As shown in FIG. The 1st storage room 7 is arrange|positioned facing the 2nd storage room 11 in the left-right direction. In the first storage room 7, a plurality of containers 39 containing agricultural products are stacked and stored. Agricultural products are not particularly limited as long as they are agricultural products that are harvested in autumn and shipped sequentially, but examples include potatoes and onions. A container 39 stored in the first storage room 7 is an example of a first container.

As shown in FIGS. 2 and 3 and FIGS. 5 and 6, the inner wall 15 is formed with openings 41, for example, at two locations in the front-rear direction. The opening 41 is, for example, a rectangular opening extending from the floor to a predetermined height. The opening 41 communicates the first storage chamber 7 and the air chamber 43 provided in the first pressure chamber 5 . The air discharged by the first fan 17 flows into the air chamber 43 and flows into the first storage chamber 7 through the opening 41 . The opening 41 is an example of a first opening.

In the first storage room 7, a plurality of containers 39 are stacked to form a container group 39G1. As shown in FIGS. 3 and 6, a pair of container groups 39G1 are arranged facing each other across the opening 41 in the left-right direction. In the example shown in FIGS. 3 and 6, for example, two pairs of container groups 39G1 are arranged side by side in the front-rear direction. The container group 39G1 is an example of the first container group.

An airbag 45 filled with air is provided in the upper portion of the space S1 between the pair of container groups 39G1 and the side portion opposite to the opening 41 (the left side in this example). The airbag 45 closes the upper portion of the space S1 and the side opposite to the opening 41 by being sandwiched between the pair of container groups 39G1. The space S1 is an example of a first space, and the airbag 45 is an example of a first blocking member.

The intermediate chamber 9 is partitioned by a front wall 3F, a rear wall 3B and doors 37,47. The intermediate chamber 9 is arranged so as to be sandwiched between the first storage chamber 7 and the second storage chamber 11 . The door 37 can be opened and closed by, for example, moving at least one of four movable doors in the front-rear direction below the wall portion 49 through which the duct 31 passes. Similarly, the door 47 can be opened and closed by, for example, moving at least one of four movable doors in the front-rear direction below the wall portion 51 through which the duct 31 passes. The intermediate chamber 9 communicates between the first storage chamber 7 and the second storage chamber 11 when the doors 37 and 47 are opened, and partitions the first storage chamber 7 and the second storage chamber 11 when the doors 37 and 47 are closed. The doors 37, 47 and the walls 49, 51 are examples of opening/closing parts. As shown in FIGS. 3 and 6, a door 52 is provided on the front wall 3F, and by opening the door 52, for example, a heavy machine such as a forklift can enter the intermediate chamber 9. The container 39 is carried into the first storage room 7 or the second storage room 11 by a forklift with the doors 37 and 47 of the intermediate room 9 opened.

The second storage room 11 is defined by a front wall 3F, a rear wall 3B, an inner wall 53 and a door 47. As shown in FIG. The second storage chamber 11 is arranged to face the first storage chamber 7 in the left-right direction. In the second storage room 11, a plurality of containers 39 containing agricultural products are stacked and stored. A container 39 stored in the second storage room 11 is an example of the second container.

As shown in FIGS. 2 and 3 and FIGS. 5 and 6, the inner wall 53 is formed with openings 55, for example, at two locations in the front-rear direction. The opening 55 is, for example, a rectangular opening extending from the floor to a predetermined height. The opening 55 communicates the second storage chamber 11 and the air chamber 57 provided in the second pressure chamber 13 . Due to the suction by the second fan 61 , the air in the second storage chamber 11 flows out to the air chamber 57 through the opening 55 and is sucked by the second fan 61 . The opening 55 is an example of a second opening.

In the second storage room 11, a plurality of containers 39 are stacked to form a container group 39G2. As shown in FIGS. 3 and 6, a pair of container groups 39G2 are arranged facing each other across the opening 55 in the left-right direction. In the example shown in FIGS. 3 and 6, for example, two pairs of container groups 39G2 are arranged side by side in the front-rear direction. The container group 39G2 is an example of the second container group.

A cloth-like sheet 59 is provided on the upper portion of the space S2 between the pair of container groups 39G2 and the side portion opposite to the opening 55 (on the right side in this example). The sheet 59 is stretched between the pair of container groups 39G2 to close the upper portion of the space S2 and the side opposite to the opening 55. As shown in FIG. For example, the sheet 59 is pulled out from a winding device 60 installed on the wall portion 51 and used, and is wound up by the winding device 60 and stored when not in use. The space S2 is an example of a second space, and the sheet 59 is an example of a second closing member.

The second pressure chamber 13 is defined by a left wall 3L, a front wall 3F, a rear wall 3B and an inner wall 53. As shown in FIG. The second pressure chamber 13 is arranged on the side of the second storage chamber 11 opposite to the first storage chamber 7 , that is, on the left side of the second storage chamber 11 . As shown in FIGS. 2 and 3 and FIGS. 5 and 6, the second pressure chamber 13 is provided with a second fan 61 that draws air from the second storage chamber 11 and discharges the air into the second pressure chamber 13 . there is 2 and 5, above the second fan 61 on the left wall 3L, an exhaust port 63 for discharging the air of the second pressure chamber 13 to the outside of the building 3 and a An intake port 65 is provided for taking in outside air into the second pressure chamber 13 . The exhaust port 63 and the intake port 65 are opened or closed by opening/closing lids 67 and 69, respectively.

As shown in FIGS. 1 and 2 and FIGS. 4 and 5, a substantially rectangular opening 71 is formed in the upper portion of the inner wall 53 at the center in the front-rear direction. Air in the second pressure chamber 13 flows out to the second storage chamber 11 through the opening 71 . The opening 71 is opened or closed by an opening/closing lid 73 .

As shown in FIGS. 1 and 4 , substantially circular openings 75 (not shown) communicating with the duct 31 are formed at both ends in the front-rear direction of the upper portion of the inner wall 53 . The duct 31 is opened or closed by opening or closing the opening 75 with the opening/closing lid 77 . When the duct 31 is opened, the air in the second pressure chamber 13 is ventilated to the first pressure chamber 5 .

As shown in FIG. 7, the container 39 is a substantially rectangular parallelepiped container. The container 39 has a front plate 39F, a rear plate 39B, a left plate 39L, a right plate 39R, and a base 39D. The front plate 39F, the rear plate 39B, the left plate 39L, and the right plate 39R are each provided with a plurality of openings 81 provided with a mesh member 79 through which air can pass. A lift slot 83 for inserting a fork of a forklift (not shown) is formed through the base 39D in a direction parallel to the short side. The container 39 is loaded in the first storage chamber 7 or the second storage chamber 11 with the long sides substantially parallel to the front-rear direction and the short sides substantially parallel to the left-right direction. With the above configuration, the container 39 is configured to allow air to flow in the front-rear direction, which is the direction in which the pair of container groups 39G1 and 39G2 face each other. At this time, since the lift slot 83 is not formed in the front-rear direction, the air can be prevented from passing through the lift slot 83, and the storage space 39S in which the agricultural products are stored can be reliably ventilated.

Note that the upper portions of the front plate 39F and the rear plate 39B of the container 39 may be closed. Alternatively, the upper portions of the front plate 39F and rear plate 39B may be covered with, for example, a shrink film or the like. As a result, even if the produce dries and shrinks during storage and the upper part of the container 39 becomes empty, it is possible to prevent air from passing through that space and to ventilate the inside of the produce more reliably.

<How to store agricultural products>
In the agricultural products storage system 1 , agricultural products harvested in autumn are stored in the first storage room 7 and the second storage room 11 . Until the next spring when the temperature of the outside air is low, the doors 37 and 47 of the intermediate chamber 9 are closed to partition the first storage chamber 7 and the second storage chamber 11, and the first storage chamber 7 and the second storage chamber 11 are separated. Separate air circulation. In this embodiment, this state is called "individual circulation". As shown in FIGS. 1 to 3, in the individual circulation, the open/close lids 23, 25, 67, 69 are opened to open the intake ports 19, 65 and the exhaust ports 21, 63, and the open/close lids 29, 73 are opened. The openings 27 and 71 are opened by pressing, and the open/close lids 35 and 77 are closed to close the duct 31 .

As a result, as indicated by arrows in FIGS. 2 and 3 , in the first storage chamber 7 , the air introduced from the intake port 19 into the first pressure chamber 5 is directed through the opening 41 by the first fan 17 to the first pressure chamber 7 . It is discharged into the space S1 between the container groups 39G1 of the 1 storage chamber 7. Since the upper portion and the left side portion of the space S1 are blocked by the airbag 45, the air flowing into the space S1 is ventilated so as to pass through the insides of the containers 39 constituting the container group 39G1 in the longitudinal direction. do. The air that has passed through each container 39 flows leftward inside the first storage chamber 7 , flows upward on the left side, flows rightward on the upper side, and flows out to the first pressure chamber 5 through the opening 27 . . Part of the air that has flowed into the first pressure chamber 5 is discharged to the outside through the exhaust port 21 . Thus, the air in the first storage chamber 7 is circulated.

On the other hand, in the second storage chamber 11, the air in the second storage chamber 11 is sucked into the space S2 between the container groups 39G2 by the second fan 61, as indicated by arrows in FIGS. Since the upper portion and the right side portion of the space S2 are closed by the sheet 59, the air in the second storage chamber 11 is ventilated so as to pass through the insides of the containers 39 constituting the container group 39G2 in the front-rear direction. . The air that has passed through each container 39 flows leftward inside the space S2 and is sucked into the second fan 61 through the opening 55 and the air chamber 57 . Part of the air discharged from the second fan 61 is discharged to the outside through the exhaust port 63 . The air introduced into the second pressure chamber 13 from the intake port 65 flows into the second storage chamber 11 through the opening 71, flows rightward and downward inside the second storage chamber 11, and flows downward. The air flows into the container 39 from the portion where the sheet 59 is not closed and is ventilated toward the space S2. Thus, the air in the second storage chamber 11 is circulated.

As described above, in the individual circulation of the first storage chamber 7 and the second storage chamber 11, air is circulated while appropriately introducing outside air into the first storage chamber 7 and the second storage chamber 11, respectively. In this way, agricultural products harvested in autumn can be cooled and stored until next spring using the cold outside air of winter.

The stored agricultural products are sequentially shipped from the first storage room 7, the first storage room 7 is emptied by next spring, and then a container 39 containing ice and snow is loaded in the first storage room 7.例文帳に追加Instead of using the container 39, the snow and ice may be directly piled up in the first storage room 7 by a heavy machine such as a forklift. In the first storage room 7, the outside air is used by individual circulation to cool snow and ice until the outside temperature rises so that they do not melt, and the value as a cold energy resource is not lowered.

After spring, when the temperature of the outside air rises and the cold heat of the outside air can no longer be used, the doors 37 and 47 of the intermediate chamber 9 are opened to communicate the first storage chamber 7 and the second storage chamber 11, and the first storage The air in the entire chamber 7 and the second storage chamber 11 is circulated. In this embodiment, this state is called "whole circulation". As shown in FIGS. 4 to 6, in the general circulation, the open/close lids 23, 25, 67, 69 are closed to close the intake ports 19, 65 and the exhaust ports 21, 63, and the open/close lids 29, 73 are closed. The openings 27 and 71 are closed by pressing, and the open/close lids 35 and 77 are opened to open the duct 31 .

5 and 6, in the first storage chamber 7, the air in the first pressure chamber 5 is blown by the first fan 17 through the opening 41 to the container group in the first storage chamber 7. The air is discharged into the space S1 between the containers 39G1, and is ventilated so as to pass through the interiors of the containers 39 forming the container group 39G1 in the front-rear direction. The air that has passed through each container 39 flows leftward inside the first storage chamber 7 and flows into the second storage chamber 11 through the opened doors 37 and 47 of the intermediate chamber 9 . The air that has flowed into the second storage chamber 11 is sucked by the second fan 61 so as to pass through the containers 39 constituting the container group 39G2 in the front-rear direction, and then flows into the space S2. The air that has flowed into the space S<b>2 is sucked into the second fan 61 through the opening 55 and the air chamber 57 and discharged to the upper side of the second pressure chamber 13 . Air discharged from the second fan 61 flows into the duct 31 through the opening 75 , passes through the inside of the duct 31 , and flows into the first pressure chamber 5 through the opening 33 . The air in the first pressure chamber 5 is discharged into the first storage chamber 7 by the first fan 17 .

In this way, the air in the entire first storage chamber 7 and second storage chamber 11 is circulated. As a result, the agricultural products stored in the second storage compartment 11 can be cooled by the air cooled by snow or ice when passing through the first storage compartment 7 .

<Example of heat balance>
In this embodiment, the cold heat required for cooling the air is mainly the melting latent heat of ice. As long as the ice is melting, the temperature of the coexisting water and ice will remain at 0°C, and the air in contact will be cooled to near 0°C, allowing the produce to be continuously cooled. The heat balance in this case can be calculated, for example, by the following equation.

Hcrop+Hbuild+Hdraft+Hfan=Hcool
Hcrop is breathing heat from agricultural products, Hbuild is heat entering from walls and ceilings of buildings, Hdraft is heat entering from drafts, Hfan is heat dissipating from ventilators such as fans, and Hcool is cooling heat from snow and ice. be.

The cooling latent heat of ice is 333.6 (kJ/kg). In normal design, for example, it is customary to design the ventilation air volume for potatoes in the range of 50 (m ³ /h·t) to 150 (m ³ /h·t). However, this maximum air volume is necessary for cooling and drying after harvesting in autumn, and after that a very small air volume is sufficient, so it is appropriate to design with the minimum design value of 50 (m ³ /h·t). It is believed that there is. In that case, the required capacity of the fan is about 100 (Pa) to 150 (Pa) and about 30000 (m ³ /h) at 3 (kW), and the storage capacity that can be covered by this fan is 600 (MT). Equivalent. Potatoes have a calorific value of about 10 (W) at 4° C., which is considered to be the optimum storage temperature, and a 600 (MT) potato has a calorific value of 6 (kW). In this case, if calculations are made without considering the heat penetration, a minimum amount of heat is required to cover 6 (kW)+3 (kW)=9 (kW). If the amount of ice that covers 9 (kW) in 24 hours is calculated, it will be 9 (kW) x 3600 (seconds) x 24 (hours) = 777600 (kJ). This means an amount of ice of 2330.1 (kg). If this continues for four months from mid-April to mid-August, for example, the calculation is 2.33 (MT) x 120 (days) = 280 (tons).

According to a simple experiment conducted by the inventors of the present application, if approximately the same amount of snow and ice can be stored, storage is possible until the middle of August when the next crop begins to be harvested. Since the density of snow and ice is much higher than the density of agricultural products, considering that the weight of snow assumed in the Building Standards Act is 1 ton per ^1m3 , the density of potatoes is almost half of this. Because of its density, it is thought that if enough space is secured to store the potatoes, enough cold heat will be secured to keep the crops cool through the summer. After that, it is to suppress the intrusion heat as much as possible by strengthening the heat insulation and strengthening the airtightness. These investments will help reduce running costs and contribute to the realization of low-cost, energy-saving technology that is desirable for global environmental conservation.

<Effects of Embodiment>
As described above, in the agricultural products storage system 1 of the present embodiment, the agricultural products harvested in autumn are stored in the first storage chamber 7 and the second storage chamber 11 until next spring when the outside air temperature is low. By closing the doors 37, 47 of the intermediate chamber 9 and individually circulating the air in the first storage chamber 7 and the second storage chamber 11, the cold outside air in winter is utilized to cool and store until next spring. be able to. A container 39 containing snow and ice is loaded in the space vacated by shipping in the first storage room 7.例文帳に追加After spring, when the temperature of the outside air rises and the cold heat of the outside air can no longer be used, the doors 37 and 47 of the intermediate chamber 9 are opened to communicate the first storage chamber 7 and the second storage chamber 11, and the first storage By circulating the air throughout the chamber 7 and the second storage chamber 11, the produce stored in the second storage chamber 11 is cooled by the air cooled by the snow or ice as it passes through the first storage chamber 7. be able to. At this time, the cold air is discharged by the first fan 17 in one of the first storage chambers 7 and sucked in by the second fan 61 in the second storage chamber 11 of the other side, so that a sufficient amount of cool air can be convected. In addition, since the air is circulated using the duct 31, it is possible to prevent the air cooled in the first storage chamber 7 and the air warmed by heat exchange with the agricultural products in the second storage chamber 11 from being mixed. Therefore, the produce can be sufficiently cooled. In this way, it is possible to use the space left by the shipment as a storage space for snow, ice, and the like, and to efficiently use the cold energy, so that the agricultural products can be continuously cooled and stored even after spring.

In the first storage room 7, if the container group 39G1 in which the containers 39 are stacked is simply ventilated with air, the air passes through the space around the container group 39G1, which has little resistance, and the inside of the container 39. of produce cannot be sufficiently cooled. Therefore, in this embodiment, the upper portion of the space S1 between the pair of container groups 39G1 arranged to face each other on both sides of the opening 41 and the side opposite to the opening 41 are blocked by the airbag 45, and , the air discharged by the first fan 17 flows into the first storage chamber 7 through the opening 41 . As a result, the air that has flowed into the first storage chamber 7 can be ventilated so as to pass through the interiors of the containers 39 that constitute the container group 39G1. As a result, the air can be brought into direct contact with the produce inside the container 39 to greatly improve heat exchange efficiency, so that the produce inside the container 39 can be sufficiently cooled.

Similarly, simply ventilating the container group 39G2 in which the containers 39 are stacked in the second storage room 11 causes the air to pass through the space around the container group 39G2, which has less resistance. Inability to sufficiently cool the produce inside. Therefore, in this embodiment, the upper portion of the space S2 between the pair of container groups 39G2 arranged to face each other on both sides of the opening 55 and the side opposite to the opening 55 are closed with the sheet 59, The air sucked by the second fan 61 is caused to flow out from the second storage chamber 11 through the opening 55 . As a result, the air in the second storage chamber 11 can be ventilated so as to pass through the interiors of the containers 39 constituting the container group 39G2. As a result, the air can be brought into direct contact with the produce inside the container 39 to greatly improve heat exchange efficiency, so that the produce inside the container 39 can be sufficiently cooled.

In this embodiment, the space S1 has a positive pressure due to the air discharged from the first fan 17. By using the airbag 45, the upper part and the side part of the space S1 can be efficiently compressed with a simple structure. can be occluded.

Further, particularly in the present embodiment, the space S2 has a negative pressure due to the suction of air by the second fan 61, but by using the cloth-like sheet 59, the sheet 59 is sucked, and the upper and side portions of the space S2 are reduced. It can be efficiently closed with a simple structure.

<Modification>
In the above-described embodiment, an airbag is used as a member for closing the space S1. members may be used. In addition, although a cloth-like sheet is used as a member for closing the space S2, any member other than the cloth-like sheet may be used as long as it is possible to close the upper and side portions of the space S2, which becomes negative pressure due to suction by the second fan 61. may be used.

It should be noted that, in the above description, descriptions such as "the same", "equal", and "different" regarding external dimensions and sizes are not strictly defined. That is, the terms "same", "equal", and "different" mean "substantially the same", "substantially equal", and "substantially different", with allowance for design and manufacturing tolerances and errors. .

In addition to the methods already described above, the methods according to the above-described embodiments and modifications may be appropriately combined and used.

In addition, although not exemplified one by one, the present invention can be implemented with various modifications within the scope of the invention.

1 produce storage system 5 first pressure chamber (an example of the third chamber)
7 First storage room (an example of the first room)
11 Second storage room (example of second room)
13 Second pressure chamber (example of fourth chamber)
17 first fan 31 duct 35 opening/closing lid 37 door (an example of an opening/closing part)
39 container (an example of the first container and the second container)
39G1 container group (an example of the first container group)
39G2 container group (an example of the second container group)
41 opening (an example of the first opening)
45 airbag (an example of the first closing member)
47 door (an example of an opening and closing part)
55 opening (an example of a second opening)
59 sheet (an example of the second closing member)
61 Second fan 77 Open/close lid S1 First space

Claims (6)

a first chamber capable of storing a plurality of first containers containing produce;
a second chamber facing the first chamber and capable of storing a plurality of second containers for storing the agricultural products;
an opening/closing unit that communicates the first chamber and the second chamber when opened and partitions the first chamber and the second chamber when closed;
a first fan installed in a third chamber arranged on the opposite side of the first chamber to the second chamber, sucking air from the third chamber and discharging the air into the first chamber;
a second fan installed in a fourth chamber installed on the opposite side of the second chamber to the first chamber, sucking air from the second chamber and discharging the air into the fourth chamber;
a duct penetrating through the opening/closing part and connecting the third chamber and the fourth chamber;
an opening/closing lid for opening or closing the duct;
A produce storage system comprising: The first chamber is
a first opening communicating between the first chamber and the third chamber and allowing the air discharged by the first fan to flow into the first chamber;
a pair of first container groups in which a plurality of the first containers are stacked so as to face each other on both sides of the first opening;
a first closing member that closes the upper portion of the first space between the pair of first container groups and the side portion opposite to the first opening;
has
The first container is
The pair of first container groups are configured to be able to ventilate the air in a direction facing each other,
The produce storage system according to claim 1, characterized in that: The second chamber is
a second opening that communicates the second chamber and the fourth chamber and causes the air sucked by the second fan to flow out from the second chamber;
a pair of second container groups in which a plurality of the second containers are stacked so as to face each other on both sides of the second opening;
a second closing member that closes the upper portion of the second space between the pair of the second container groups and the side portion opposite to the second opening;
has
The second container is
The pair of second container groups are configured to allow the air to flow in the direction facing each other,
The agricultural product storage system according to claim 1 or 2, characterized in that: The first closing member is
an air-filled airbag sandwiched between a pair of said first container groups so as to occlude said top and said sides of said first space;
The produce storage system according to claim 2, characterized in that: The second closing member is
A cloth-like sheet stretched between the pair of second container groups so as to block the upper portion and the side portion of the second space,
The produce storage system according to claim 3, characterized in that: When partitioning the first chamber and the second chamber that are arranged to face each other, a plurality of first containers containing agricultural products are stored in the first chamber, and a plurality of second containers containing the agricultural products are stored. The air is stored in the second chamber, and the air in the third chamber arranged on the opposite side of the first chamber to the second chamber is sucked and discharged into the first chamber, and the air in the first chamber is transferred to the third chamber. The air in the first chamber is circulated by ventilating the chamber, the air in the second chamber is sucked and discharged into the fourth chamber installed on the opposite side of the second chamber to the first chamber, and the circulating the air in the second chamber by ventilating the air in the fourth chamber to the second chamber;
When the first chamber and the second chamber are communicated, a plurality of the first containers containing snow or ice are stored in the first chamber, and a plurality of the second containers containing the agricultural products are stored. is stored in the second chamber, the air in the third chamber is sucked and discharged into the first chamber, the air in the second chamber is sucked and discharged into the fourth chamber, and the air in the fourth chamber is circulating the air in the first chamber and the second chamber by ventilating the third chamber;
An agricultural product storage method characterized by:

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