JPH0541331Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cold storage box, and more particularly to a cold storage box that can maintain constant temperature for a long period of time and has improved cooling efficiency.

So-called constant-temperature delivery is used to preserve the freshness and flavor of fresh vegetables, perishable foods, chilled foods, etc., and to deliver drugs and drinks stored in ampoules from producers and sellers to consumers while preserving their efficacy. is essential. In other words, cold storage is necessary to maintain freshness, flavor, efficacy, etc., but if kept too cold, not only will the flavor and efficacy be lost, but the moisture will freeze and form a cage, significantly reducing the product value. . There is also a risk of damage to the container due to freezing. However, each of these must be maintained at its own proper temperature before being delivered.

On the other hand, as such constant-temperature and refrigerated delivery becomes more widespread, the area covered ranges from short-to-medium distances to long distances, and therefore the time required for constant-temperature and refrigerated delivery tends to increase, and in general, it is necessary to withstand constant-temperature and refrigerated delivery for about 72 hours. It is said that there is.

Conventionally, this type of cold storage box has a box body made of expanded polystyrene divided by partition plates (commonly known as batten plates) with many through holes, and the cold pack is stored in one side and the items to be cooled are stored in the other. It becomes. A large number of through holes are provided to allow cold air from the ice pack to pass through.

In an attempt to extend the time for constant-temperature and cold storage delivery, the inventor of this invention initially left the heat conduction of the partition plate as is, and by placing aluminum foil on the inside of the cold storage box, etc., the cold air from the ice pack storage area to the outside of the cold storage box was transferred. Attempts were made to prevent this dissipation, but the constant temperature and cooling time was only slightly extended, the problem of overcooling occurred, the cost increased, and practicality was not achieved. As a result of continued research, we found that by creating a partition wall without communication holes, in other words, by suppressing the movement of cold air from the refrigerant compartment to the object compartment by the insulation properties of the partition wall, we unexpectedly found that It was discovered that a wide time extension can be achieved and overcooling can be prevented, leading to the present invention.

That is, the present invention is composed of a lid made of closed-cell foamed synthetic resin and a container body, and there are communicating holes made of the foamed synthetic resin in the main body with a thickness that can suppress the transfer of cold and heat to the required amount. A plurality of object chambers are provided independently so as to surround each object to be refrigerated by a cold insulating bulkhead, and each of the object chambers is adjacent to a refrigerant chamber via the cold insulating bulkhead. The contents are a refrigerated box made of foamed synthetic resin for refrigerated delivery.

To explain the present invention based on drawings showing embodiments, in FIG. 1, the cold storage box is divided into a cold storage object chamber 1 and a cold storage agent chamber 2 alternately by a cold storage partition 3, and both chambers 1 and 2 are mutually separated. Adjacent. 4 is the lid, 5 is the object to be kept cold, and 6 is the ice pack (dry ice).
It is.

The cold box of the present invention is made of a material with excellent heat insulation performance, such as foamed synthetic resin, particularly foamed polystyrene, which has excellent heat insulation properties and suitable rigidity as a box body.

The cold-insulating partition wall of the present invention may be made of substantially no communicating holes, and for example, closed-cell foamed synthetic resin is suitable, and foamed polystyrene is especially suitable.

FIG. 2 shows the relationship between the thickness of the cold insulation partition made of expanded polystyrene having different densities and the ambient temperature inside the cold storage object chamber. As is clear from the figure,
There is a linear relationship between the thickness of the cold partition wall and the ambient temperature, and the thickness of the cold partition wall required to maintain a desired atmospheric temperature can be easily determined. For example, in the case of an object to be kept cold whose constant temperature is between 0°C and 10°C,
The thickness of the cold bulkhead may be approximately 16 to 18 mm. Of course, in addition to the thickness, the surface area of the partition wall is also an important factor, and is determined by appropriately combining these factors.

FIG. 3 is a graph showing the relationship between the density and thermal conductivity of expanded polystyrene at room temperature. From the same figure, the thermal conductivity of the cold insulation partition of this invention is 0.029.
It is desirable that the temperature is ~0.032Kkal/m.hr.℃.

There are no particular restrictions on the cold pack used in the present invention, and a suitable cold pack may be selected depending on the desired ambient temperature. For example, dry ice, ice, etc. may be used, and dry ice is particularly suitable because the cold storage box of the present invention employs the cold storage partition wall, so there is no fear of overcooling. Of course, two or more of the above ice packs may be used in combination.

In addition, in FIG. 1, by housing a cold storage agent such as "Icenon (registered trademark)" in the object to be cooled chamber 1, the constant temperature cooling time can be greatly extended as will be described later.

Although the above-mentioned cold storage box has a cold-insulated object chamber and a cold pack chamber arranged horizontally in rows on the cold insulation partition, it may have a structure in which they are divided and arranged in rows in the vertical direction. Further, the shape of the cold box, the shape of the cold storage object chamber, and the cold pack chamber are not limited to rectangular shapes, and may be any shape. Further, the two chambers may be configured in a grid pattern, and the two chambers may have different sizes.

FIG. 4 shows another embodiment of the inventive cold box, in which A is a vertical cross-sectional view and B is a horizontal cross-sectional view. In these figures, a cold storage object chamber 1 and a cold pack chamber 2 are horizontally divided and arranged by a cold storage partition wall 3, and a partition plate 7 is placed on top of the partition wall 3. The partition plate 7 is provided with a through hole 8 in a portion defining the object chamber 1 to be cooled. A lid body 4 is placed on the top of the partition plate 7.
A regenerator chamber 9 is provided between the two. Thus, the cold storage agent chamber 9 and the cold storage object chamber 1 are in communication with each other through the through holes 8 of the partition plate 7. 5 is the object to be refrigerated, 6 is the ice pack (dry ice),
10 is a cold storage agent. The partition plate 7 may be made of the same material as the cold box and the cold bulkhead. With such a structure, the constant temperature/cooling time is further extended. That is, first, the cold storage agent cools the object to be kept cold and the cold storage agent, and then the cold storage agent cools the object to be kept cold, and as a result, the cold storage time becomes significantly longer. Examples of the cold storage agent used in the present invention include a cold storage agent such as "Icenon (registered trademark)" which is made of an electrolyte and a gelling agent, and various other cold storage agents. It is preferable to select these cold storage agents from a constant temperature suitable for the object to be cooled and one having an optimal melting point.

FIG. 5 shows still another embodiment.
In Figures A and B, the surface of the cold insulation partition wall 3 on the side of the object to be kept cold 1 has an uneven shape. With such a structure, the surface area on the inside, that is, on the object chamber 1 side, is larger than on the outside, that is, the cold storage chamber 2 side of the partition wall 3, and therefore, the surface area is larger on the inside, that is, on the object chamber 1 side. Not only is the temperature uniform, but also when the outside air temperature is high (40 to 60°C), it is possible to reduce the amount of dry ice remaining when the temperature of the object to be refrigerated reaches the limit, which is efficient.

FIG. 6 shows yet another embodiment of the present invention, in which the object chamber 1 and the refrigerant chamber 2 are separated by a cold storage partition wall 3, but they are not arranged in alternating rows. The storage compartment 1 is arranged on the inside, and the refrigerant compartment 2 is adjacent to the outer side of the storage compartment 1, and the partition plate 7 has a flexible material,
They are fitted using elastic force.

The feature of the cold box of this invention is that it does not rely on the usual method of preventing the cold air from escaping outside the box.
By suppressing the transmission of cold air from the refrigerant compartment to the object compartment using a refrigerant partition wall, and further by combining this with a regenerator, it is possible to improve the refrigerant efficiency and extend the refrigerant time. . The insulated box of the present invention consists of a plurality of compartments for objects to be refrigerated, and the side walls and partition walls of the insulated box that form the compartments function as cushioning materials, so it is not necessary to use a glass container that is at risk of being damaged by impact during shipping. It is particularly suitable for medicines, medicines, ampoules, various drinks, etc.

As mentioned above, the insulated box of the present invention not only prevents supercooling phenomenon and effectively achieves constant temperature and cold storage, but also greatly extends the constant temperature and cold storage time, contributing to the logistics system of constant temperature and cold storage delivery. It's large.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of the present invention, Figure 2 is a sectional view showing an embodiment of the present invention;
The figure is a graph showing the relationship between the thickness of the cold insulation partition used in the present invention and the ambient temperature of the cooled object chamber, Figure 3 is a graph showing the relationship between the density and thermal conductivity of expanded polystyrene, and Figure 4 is a graph showing the relationship between the density and thermal conductivity of expanded polystyrene. A is a vertical sectional view, B is a horizontal sectional view, FIG. 5 is a sectional view showing another embodiment, and FIG. 6 is a sectional view showing still another embodiment. . DESCRIPTION OF SYMBOLS 1...Cold storage object chamber, 2...Cold pack chamber, 3...Cold insulation bulkhead, 4...Lid, 5...Cold storage object, 6...Cold pack, 7...Partition plate, 8...Transparent Hole, 9...Cold storage agent chamber, 10...Cold storage agent, 11...Recessed portion.

Claims (1)

[Claims for Utility Model Registration] 1. Consisting of a lid and a container body made of closed-cell foamed synthetic resin, the body being made of the foamed synthetic resin with a thickness that can suppress the transfer of cold and heat to the required amount. A plurality of object compartments are provided independently so as to surround each object to be refrigerated by a refrigerated bulkhead having no communication holes, and each of the refrigerated object chambers is adjacent to a refrigerant chamber via the refrigerated partition wall. A cooling box made of foamed synthetic resin for cold delivery. 2. A cold storage box according to claim 1 of the utility model registration claim, which stores a cold storage agent together with objects to be kept cool in a chamber for objects to be kept cold. 3 The object chamber to be kept cool and the ice pack chamber are horizontally divided by a cold insulating bulkhead without communicating holes made of closed-cell foamed synthetic resin with a thickness that can suppress the transfer of cold heat to the required amount, and the object chamber to be kept cool is A partition plate with a through hole is placed in a part defining the storage compartment, and a cool storage chamber is formed between the partition plate and the lid above the partition plate, and the storage compartment is The cold storage box according to claim 1, which is a utility model, and has a structure in which the cold storage chamber and the cold storage chamber communicate with each other through a hole in the partition plate.