JPH0732460Y2 - Cardboard box for vacuum cooling - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a corrugated cardboard box mainly used for cooling and storing agricultural products such as vegetables and fruit vegetables with a vacuum cooling device for the purpose of keeping them fresh. Regarding

[Conventional technology]

As a vacuum cooling device, a vacuum cooling tank for containing an object to be cooled such as vegetables, a vacuum pump for sucking air in the vacuum cooling tank through a suction pipe, and a suction pipe provided in the suction pipe in communication with a refrigerator. A cold trap that captures water vapor in the flowing air is provided, and by vacuuming the inside of the vacuum cooling tank by operating the vacuum pump, water is evaporated from the surface of the vegetables and the like contained in the vacuum cooling tank, It is known that the latent heat of vaporization cools itself.

When cooling vegetables and the like with such a vacuum cooling device, conventionally, the objects to be cooled, such as the vegetables, are put into an ordinary cardboard box as they are, and after being carried into a vacuum cooling tank and cooled,
The cardboard is taken out of the vacuum cooling tank and stored or transported.

[Problems to be solved by the device]

However, in the above vacuum cooling device, the temperature is 5.5.
Since 1% of water is lost from vegetables etc. every time the temperature decreases, there is a problem that the vegetables etc. are lost or wilted and the commercial value is lowered. Further, since the object to be cooled itself has a structure in which it is cooled only by the water held therein, it is impossible to cool agricultural products and the like, which have a small surface area with respect to weight and are hard to evaporate water.

The present invention, when cooled by a vacuum cooling device, suppresses evaporation of contained water to prevent loss and wilting, and can cool vegetables and fruits widely and quickly without impairing commercial value. It is an object of the present invention to provide a long-life cardboard box for vacuum cooling, which can be easily applied to the cardboard box of.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a rectangular parallelepiped cardboard box in which a lid that closes an opening that opens upward is connected to the upper side of two or more side plates in a substantially horizontal foldable manner. A waterproof sheet is attached to the upper part of the lid and a part of the lid connected to the side plate from the inner surface of the lid to the inner surface of the side plate,
A moisture absorbing / releasing member smaller than the waterproof sheet, such as gauze, is attached to the inner surface position of the waterproof sheet that does not come into contact with other lids in the closed state, with the peripheral portion of the waterproof sheet left.

[Action]

When cooling the object to be cooled with a vacuum cooling device, add a suitable amount of water to the moisture absorptive and desorptive material of the cardboard box containing the object to be cooled, carry it into the vacuum cooling tank, and operate the vacuum pump to perform vacuum cooling. Vacuum the chamber.

When the air pressure in the vacuum cooling tank drops due to the operation of the vacuum pump,
The moisture previously impregnated in the moisture absorptive and desorptive member actively evaporates and the latent heat cools the inside of the cardboard box.

At this time, if the object to be cooled contained in the cardboard box is a vegetable containing water, the water will also evaporate from the object to be cooled, but it will be exposed directly in the air and easily evaporated. Unlike the moisture of the moisture absorbing / releasing member, which is different from the moisture absorbing / releasing component, the moisture contained in vegetables is covered by the epidermis, so the evaporation can be suppressed to a very small amount.

Therefore, the product value will not be reduced due to the vegetables and the like being worn out or wilted. It is also possible to cool processed foods with low water content and products containing almost no water content.

The waterproof sheet prevents moisture impregnated in the moisture absorptive and desorptive member from bleeding into the cardboard box to weaken the strength of the cardboard box or stains on the cardboard box, and enhances the folding strength of the lid. Since the moisture absorptive and desorptive member does not come into contact with other lids in the closed state of the lid, adverse effects due to moisture are prevented in this respect as well.

〔Example〕

The accompanying drawings show one embodiment of the present invention, and reference numeral 1 in the drawings
Is a cardboard box. This corrugated cardboard box 1 is made by folding a corrugated cardboard made of paper or synthetic resin into which a corrugated flute (center shin) 3 is sandwiched between two liners 2 and 2 into a rectangular parallelepiped shape. The lids 1a that close the openings that open upward are each made up of a series of substantially horizontally foldable and foldable columns. Since there are various corrugated cardboard structures, the assembly structure of the box 1, and the like, it is not limited to the illustrated one.

And the side plate from the inner surface of the lid 1a to the side plate 1b and a part of the lid 1a.
A waterproof sheet 4 is adhered to the inner surface of 1b, and a moisture absorbing / releasing member 5 is further adhered to the inner surface of the waterproof sheet 4.
As the waterproof sheet 4, various plastic films, aluminum foil having high heat reflectivity, etc. are used.
As the moisture absorptive and desorptive member 5, gauze, paper towel, highly water absorptive and desorptive resin, or the like is used.

The waterproof sheet 4 prevents the moisture absorbing / releasing member 5 from bleeding toward the corrugated board to weaken the strength of the box 1 when the moisture absorbing / releasing member 5 contains water, and also to prevent the box 1 from becoming dirty as a stain. The size is made slightly larger than the moisture absorptive and desorptive member 5, and its peripheral portion is left as shown in FIG. Also, the moisture absorbing / releasing member 5
Is arranged so that when the four lids 1a are horizontally folded inward to close the box 1, the other lids 1a are not contacted.

In the above configuration, the moisture-absorbing / releasing member 5 is prevented from directly contacting the corrugated board by the waterproof sheet 4, and the moisture leaks directly from the edge of the moisture-absorbing / releasing member 5 to the corrugated board. It is prevented by the peripheral portion. Further, the moisture absorptive and desorptive member 5 does not directly touch the other lid 1a to cause the lid 1a to permeate water. Besides, the side plate
The folding strength of the lid 1a is enhanced by the waterproof sheet 4 at the boundary between the lid 1a and the lid 1a. Further, the contact of the moisture absorbing / releasing member 5 with the object A to be cooled can be avoided as much as possible.

Next, the operation of the vacuum cooling corrugated board box according to the present invention constructed as described above will be described.

In order to cool the object to be cooled A with the vacuum cooling device, the object to be cooled A is put in the cardboard box 1 and the moisture absorbing / releasing member 5 is used.
Then, the lid 1a is closed by impregnating a proper amount of water with a spray, a roller, or the like, put in a vacuum cooling tank, and the vacuum pump is operated.

When the air pressure in the vacuum cooling tank drops due to the operation of the vacuum pump,
Evaporation of water from the moisture absorptive and desorptive member 5 becomes active, and the latent heat of evaporation at that time cools the inside of the cardboard box 1 and the object to be cooled A contained in the box. The cooling extends to the space of the flute 3 and also outside the box 1. As the degree of vacuum increases, the heat insulating effect of the air layer in the cardboard box 1 (including the space of the flute 3) increases. Moisture absorbing and desorbing member 5 by latent heat of vaporization
The cold air generated in 1 is lowered mainly due to the difference in specific weight, and cools the object A to be cooled.

Simultaneously with the cooling by the moisture absorptive and desorptive member 5, the water content of the object to be cooled A also evaporates and self-cools. However, the water immersed in the moisture absorptive and desorptive member 5 is directly exposed in the air and easily evaporated. On the other hand, since the water on the side of the object to be cooled A is usually covered with the skin and is hard to evaporate, the amount of evaporation is very small.

Therefore, the object to be cooled A is not worn out or wilted, and the commercial value is normally maintained. Further, since the moisture absorptive and desorptive member 5 can retain a sufficient amount of water, it is possible to cool processed foods containing a small amount of water and products having almost no water.

If the amount of water to be absorbed by the moisture absorptive and desorptive member 5 is determined based on the experimental data for each object A to be cooled, even when the cardboard box 1 is discharged into the atmosphere or stored in a cool box, Without leaving water on the moisture absorptive and desorptive member 5, as a result, it is possible to prevent the agricultural products from getting wet and keep the strength of the cardboard box.

The results of spinach cooling experiments are shown in the following table.

In the table, “conventional example” indicates the temperature of each part when spinach was placed in an ordinary corrugated cardboard box not provided with a moisture absorbing / releasing member and spinach A was cooled to 0.5 ° C. by a well-known vacuum cooling device ( C), which took 16.0 minutes.
The indications (a) to (g) show the corresponding parts in FIG.
Further, the "present invention" uses the cardboard box for vacuum cooling of the present invention to which the moisture absorptive and desorptive member 5 is adhered, and the moisture absorptive and desorptive member 5 is made to contain water so that the spinach A has the same temperature as the "conventional example". That is, the temperature of each part when it was cooled to 0.5 ° C. At this time, cooling was completed in 10.5 minutes.

According to the present invention, the object A to be cooled can be cooled to a predetermined temperature in a short time, and the temperature of the cardboard box itself can be effectively lowered as compared with the conventional case. Therefore, cooling is maintained for a long time not only in storage but also in transportation and the like. Further, in the present invention, spinach did not become worn or wilted.

(Effects of the Invention) As described above, the present invention is a rectangular parallelepiped cardboard box in which a lid that closes the opening that opens upward is continuously connected to the upper sides of two or more side plates in a substantially horizontally foldable manner. A waterproof sheet is attached to the upper part of the side plate and a part of the lid connected to the side plate from the inner surface of the lid to the inner surface of the side plate, and the waterproof sheet is placed at the inner surface position of the waterproof sheet that does not contact other lids in the closed state. Since the moisture absorbing / releasing member smaller than the sheet, such as gauze, is adhered to the waterproof sheet with the peripheral portion left, it has the following effects.

It is possible to suppress the evaporation of the water content of the object to be cooled, prevent the loss of water and the wilting, maintain the freshness normally, and enhance the commercial value.

Agricultural products, which have a small surface area and are difficult to vacuum-cool, can be cooled freely and quickly.

Direct contact of the moisture absorptive and desorptive member to the corrugated board is completely prevented by the waterproof sheet, and moisture is prevented from directly bleeding into the corrugated cardboard from the edge of the moisture absorptive and desorptive member by the extra peripheral edge portion of the waterproof sheet, Since the moisture absorptive and desorptive member does not come into contact with other lids, moisture does not permeate the corrugated board and the strength is not reduced. Therefore, it can be repeatedly used many times over a long period of time, which is economical.

Since the folding strength of the lid is enhanced by the waterproof sheet at the boundary between the side plate and the lid, the life of the lid is also increased in this respect.

Since the contact of the moisture absorptive and desorptive member with the object to be cooled can be avoided as much as possible, the moisture absorptive and desorptive member can be prevented from being damaged and is hygienic.

Due to its simple structure, it can be easily implemented on existing cardboard boxes.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an external view showing a state in which a lid of a cardboard box for vacuum cooling according to the present invention is opened, and FIG. 2 is attached with a moisture absorbing / releasing member. FIG. 3 is a schematic sectional view of a corrugated board, and FIG. 3 is a schematic sectional view for explaining a cooling experiment. DESCRIPTION OF SYMBOLS 1 ... Corrugated cardboard box, 1a ... Lid, 1b ... Side plate 2 ... Liner, 3 ... Flute, 4 ... Waterproof sheet 5 ... Moisture absorbing / releasing member, A ... Object to be cooled

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Actual development 2-135228 (JP, U) Actual development 55-50986 (JP, U) Actual development 2-40081 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A rectangular parallelepiped cardboard box in which a lid that closes an opening that opens upward is continuously connected to the upper sides of two or more side plates in a substantially horizontal foldable manner, and is connected to the upper side of the side plates and the side plates. A waterproof sheet is adhered to a part of the covered lid from the inner surface of the lid to the inner surface of the side plate, and in the inner surface position of the waterproof sheet that does not come into contact with other lids in the closed state, moisture absorptive and desorptive property such as gauze smaller than the waterproof sheet. A cardboard box for vacuum cooling, characterized in that the members are attached to the waterproof sheet, leaving the peripheral edge portion aside.