JPH0533898Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is suitable for cold storage containers, especially for long-distance and long-distance transportation such as when transporting items such as food while keeping them cold while transporting them by rail or sea. Concerning refrigerated containers such as those used in

BACKGROUND TECHNOLOGY Conventionally known refrigerated containers of this type are assembled into an enclosing box body using heat insulating panels, and store objects to be refrigerated inside the container, as well as dry containers to cool these objects. It was used by placing a cold source such as ice cream directly on the object to be refrigerated, or by fixing it to the ceiling inside the container body with a rubber band or the like.

Problems that the invention aims to solve When using this type of refrigerated container for long-distance, long-distance transportation (up to about 3 days), for example, if the loading weight is about 5 tons, it will take 200 to 200 kg in midsummer.
Approximately 300 kg of dry ice is required. For this reason, the interior of the storage chamber is excessively cooled, especially in the initial state in which the product is stored, making it difficult to appropriately control the product temperature. In addition, there was a problem in that the dry ice was quickly consumed due to thermal energy loss accompanying such supercooling, and a uniform cooling state could not be maintained for a long period of time.

This idea was made to solve the above-mentioned problems, and it is possible to avoid overcooling in the storage room when the cold heat source is first stored, and to maintain the desired cooling state for a long time. It is an object of the present invention to provide a refrigerated container that can be held and used suitably for long-distance, long-distance transportation such as rail transportation or marine transportation.

Means for Solving the Problems The refrigerated container according to this invention includes a cold source storage chamber and a storage chamber, and these two chambers are thermally connected through a plurality of heat pipes, and A heat pipe H is installed in the cold heat source storage chamber A.
A plurality of regions with different arrangement densities are formed.

Various means can be adopted to provide the above area, but for example, the cold source storage chamber and the storage chamber are connected to a plurality of heat pipes integrally provided in a mesh or lattice circuit on a metal heat pipe panel. The heat pipes may be thermally connected by a pipe, and the circuit pattern density may be set to be different between at least one heat pipe and the other heat pipe.

Function When dry ice is stored as a cold heat source in the cold source storage chamber, for example, the cold energy is transferred into the storage chamber via heat pipes. Since a plurality of different regions are formed, in the initial state in which the cold heat source is stored, cold heat is efficiently transferred into the storage chamber mainly from the relatively dense region.

In addition, since the degree of consumption of the cold source differs in each part of the cold source storage room, even if the cold source is used up in an area with a high density of heat pipes, it still remains in a relatively sparse area. Since it has not been used up, the cold source in that area continues to transfer cold energy to the storage room. Therefore, the desired uniform cooling state is maintained for a long time.

In addition, when using a heat pipe that is integrated with a metal heat pipe panel,
The denser the circuit pattern, the better the cooling and heat transfer efficiency. Therefore, by using a plurality of heat pipes with different circuit pattern densities, in the initial state in which the cold heat source is stored, the cold heat can be efficiently transferred by the heat pipes with the relatively dense density. Even after the surrounding cold sources are used up, cold heat continues to be transferred by the heat pipe with the sparse circuit density.

Embodiments Hereinafter, this invention will be explained based on illustrated embodiments.

The refrigerated containers of the embodiments shown in FIGS. 1 to 4 are relatively large containers used for long-distance and long-distance transportation such as rail transportation and sea transportation. A cold source storage chamber A is provided in the storage chamber A, the lower part of which constitutes a storage chamber B, and a plurality of heat pipes H are arranged to thermally connect both chambers A and B. .

The container body 1 is constituted by a peripheral wall having heat insulating properties filled with a heat insulating material c such as foamed polyurethane synthetic resin between an interior wall board a and an exterior wall board b. Two adjacent sides of the container main body 1 are open, and the main body 1
Double door opening/closing doors 2 and 3 with the same insulation structure as
is installed.

The cold source storage chamber A is provided on the lower surface of the upper wall 1a at the longitudinally intermediate portion of the container main body 1 over substantially the entire width thereof. It is fixed to the lower surface of the top wall 1a, and one longitudinal end thereof is closed by a heat insulating end wall 5, while the other end is connected to a cold source insertion opening 6 formed in the side wall 1b of the container body 1. The storage chamber A and the storage chamber B are directly connected to the outside of the container body 1 through the storage chamber A and the storage chamber B.
are separated from each other airtightly and thermally.
A heat-insulating opening/closing door 7 is attached to the insertion port 6. Since the cold source storage chamber A is directly communicated with the outside through the insertion port 6, the cold source D can be directly taken in and taken out without opening and closing the opening/closing doors 2 and 3 of the container body 1. It is. However, the cold/heat source insertion port may be provided inside the storage chamber B.

A cold source D such as dry ice is inserted into the cold source storage chamber A through the insertion port 6, but since this type of large cold container uses dry ice in units of 100 kg, The total weight can exceed 300 kg, and the structure must be able to withstand such a load. In this embodiment, a reinforcing bar 8 is embedded in the bottom wall 4a of the cold/heat source storage chamber A, and one end thereof is fixed to the side wall 1b of the container body 1, and the other end is fixed to the top wall 1a of the container body 1. It is reinforced by fixing it to a fixed hanging rod 9.

On the other hand, on the ceiling surface side of the storage room B, there is a slight wall extending from the lower part of the side walls 4b, 4b constituting the cold/heat source storage room A toward the side wall 1c of the container main body 1 and the opening/closing door 3 facing them. Insulating ceiling walls 10, 10 extending downwardly are arranged, and the walls 10, 10 are suspended from the top wall 1a of the container body 1 by a hanging plate 11 in a spaced manner. Fixed.

As shown in FIG. 4, a metal heat pipe panel P divided into six parts is arranged on the lower surface of the ceiling walls 10, 10, and each end of these panels P is used to store the cold heat source. side wall 4b of chamber A,
4b, and is arranged and fixed on the bottom wall 4a in the chamber A.

Each of the heat pipe panels P is a roll bond panel made of aluminum with excellent thermal conductivity and has a hollow part with a mesh or lattice circuit. A heat pipe H is configured by enclosing a working fluid.

Therefore, in the installed state of the above panel P,
A portion of the heat pipe H facing into the cold source storage chamber A constitutes a condensing portion H1, and a portion facing into storage chamber B constitutes an evaporating portion H2. , the cold source storage chamber A and the storage chamber B are thermally connected via the heat pipe H. Note that by providing the cold source storage chamber A in the longitudinally intermediate portion of the container body 1 as described above, consideration is given to minimizing the dead space in the storage chamber B as much as possible. The heat pipe H may be disposed not only along the ceiling surface of the container body 1, but also along the inner surface of the side wall by further extending the heat pipe H.

As shown in FIG. 4, the heat pipes H in each of the panels P have three types of circuit pattern densities: sparse, dense, and medium. On both sides of the direction, they are arranged in the order of sparse, dense, medium, and medium, dense, sparse, respectively. Due to this arrangement, a plurality of regions in which the heat pipes H are arranged at different densities are formed in the cold source storage chamber A.

When this cold storage container is used, a cold heat source D such as dry ice is inserted into the cold source storage chamber A through the insertion port 6, and an object to be kept cold such as food is stored in the storage chamber B.

Then, the cold energy from the cold heat source D is transferred into the storage room B through each heat pipe H, and the inside of the room B is rapidly and uniformly cooled from substantially the entire ceiling surface side.

However, since the circuit pattern densities of the heat pipes H in each heat pipe panel P are different, cold heat is transferred more efficiently on the side of the panel P where the circuit pattern density is higher. Therefore, the dry ice D near the condensing part H1 of the heat pipe H where the circuit pattern density is dense
The condensing part H of the heat pipe H is sparse and wears out quickly.
The dry ice D near 1 is consumed more slowly. Therefore, by appropriately setting the circuit pattern density, it is possible not only to quickly achieve the desired uniform cooling state without overcooling the storage chamber B in the initial state where dry ice D is stored, but also to achieve uniform cooling. The state can be maintained for a long time.

Further, since the ceiling of the container body 1 is provided with an insulating cold source storage chamber A that can store a cold source D such as dry ice, the cold source D such as dry ice can be stored in a stable state. This eliminates the inconveniences that occur when conventional products are placed directly on objects to be refrigerated or fixed to the top wall of the container body with rubber bands, etc., i.e., cold sources caused by vibrations, etc. It is possible to avoid accidental shifting or falling of the product. In particular, in the case of large refrigerated containers that use 100 kg of dry ice, safety can be significantly improved.

Furthermore, since the evaporation section H2 of the heat pipe H is set in an inclined shape, the working fluid condensed in the condensation section H1 is smoothly refluxed.
As a result, the heat pipe H can operate satisfactorily.

Furthermore, since both chambers A and B are airtightly partitioned from each other, even when dry ice is used as the cold source D, the carbon dioxide gas, which is the vaporized gas, is prevented from entering the storage chamber B. Therefore, it does not cause any deterioration in the quality of fresh foods.

In addition, in the above embodiment, one heat pipe panel P is provided with one heat pipe circuit, but one heat pipe panel P is provided with a plurality of independent heat pipe circuits. You can do it like this.

Furthermore, as for the heat pipe H, it is most efficient to construct it as a heat pipe panel as in the above embodiment, and it is advantageous in terms of manufacturing and appearance design, but it is also possible to use a pipe-on-sheet, for example. Alternatively, a rod-shaped heat pipe may be used. For example, when using rod-shaped heat pipes, the arrangement interval may be set appropriately.

In short, in this invention, the cold source storage chamber A and the storage chamber B are thermally connected by a plurality of heat pipes H, and the heat pipes H are arranged at different densities in the cold source storage chamber A. Any other design changes are acceptable as long as a plurality of regions are formed.

Effects of the invention As mentioned above, the cold storage container according to this invention is provided with a cold source storage chamber that can store cold sources such as dry ice, so it can store cold sources such as dry ice in a stable state. This eliminates the inconveniences that occur when conventional products are placed directly on objects to be refrigerated or fixed to the top wall of the container body with rubber bands, etc., i.e., cold sources caused by vibrations, etc. It is possible to avoid accidental shifting or falling of the product. In particular, safety in large refrigerated containers using 100 kg of dry ice can be significantly improved.

In addition, since the cold heat source storage room and the storage room are thermally connected by multiple heat pipes, the cold energy from the cold heat source is transferred into the storage room via each heat pipe, thereby cooling the inside of the storage room. be done. In particular, since a plurality of areas with different heat pipe densities are formed in the cold source storage chamber, by appropriately setting the density, it is possible to increase the temperature in the storage chamber in the initial state when the cold source is stored. Not only can cooling be prevented, but the thermal energy loss associated with such supercooling can be eliminated, so the duration of cold storage can be extended. In addition, the degree of consumption of the cold source differs in each part of the cold source storage room, so even if the cold source is used up in an area where heat pipes are densely arranged, it is still not used up in other areas. Therefore, the cold source in that area continues to transfer cold energy to the storage room. Therefore, the desired uniform cooling state is maintained for a long time.

In addition, the cold source storage chamber and the storage chamber are thermally connected by a plurality of heat pipes integrally provided in a mesh or lattice circuit on a metal heat pipe panel, and at least one In addition to the above effects, if the pipe and the other heat pipe have different circuit pattern densities,
Since cold energy is transferred from the entire surface of the panel, the inside of the storage room can be cooled efficiently and uniformly, and it can be installed securely in a refrigerated container with simple work, and it also has a good appearance. sell.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of this invention, with Figure 1 being an overall perspective view showing the opening/closing door of the cold/heat source insertion port being opened, and Figure 2 being the figure 1--.
FIG. 3 is an enlarged cross-sectional view taken along the line of FIG. 2, and FIG. 4 is a cross-sectional view taken along the line of FIG. 2. A...Cold heat source storage room, B...Storage room, D...Cold heat source, H...Heat pipe, P...Heat pipe panel.

Claims (1)

[Claims for Utility Model Registration] (1) A cold source storage chamber A and a storage chamber B are provided, and both chambers A and B are thermally connected via a plurality of heat pipes H. A cold storage container characterized in that a plurality of regions in which heat pipes H are arranged at different densities are formed in a heat storage chamber A. (2) Equipped with a cold/heat source storage chamber A and a storage chamber B, and both chambers A and B are made of metal heat pipe panels P.
are thermally connected by a plurality of heat pipes H integrally provided in a mesh-like or lattice-like circuit, and the circuit pattern density is different between at least one heat pipe H and the other heat pipe H. A refrigerated container characterized by being