Cold storage container and cold storage body

Abstract

To provide a cool storage container and a cool storage body to effectively suppress temperature rise of a cooling object when being stored as a cool storage body formed by filling a cool storage solvent into a cool storage container together with a cooling object in a cooling box or the like.SOLUTION: The inventors have found out as a result of research works that providing at least one cool air downflow hole in surfaces of planes of a cool storage container which are disposed so as to be opposite to each other so as to penetrate the planes, when a cool storage body in which the cool storage container is filled with a cool storage solvent is disposed in an upper part of a cooling object, can expose the cooling object on the lower side to cool air and effectively suppress temperature rise of the cooling object.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present technology relates to a cold storage container and a cold storage body. More specifically, it relates to a cold storage container provided with a mechanism for forming a cold air flow and a technology of a cold storage body.

Background Art

[0002] Conventionally, a technology related to a cold storage body that suppresses the temperature rise of a cold storage target by storing it together with the cold storage target in a cold storage box or the like is known.

[0003] For example, Patent Document 1 below discloses a substantially rectangular plate-shaped cold storage container having a feature in the shape of a region for storing a cold storage solvent, and a cold storage body in which the cold storage container is filled with a cold storage solvent.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present technology relates to a cold storage container and a cold storage body, and the main object is to effectively suppress the temperature rise of a cold storage target when a cold storage body filled with a cold storage solvent in the cold storage container is stored together with the cold storage target in a cold storage box or the like.

Means for Solving the Problems

[0006] As a result of intensive research by the present inventors, by providing at least one cold air downward flow forming hole penetrating the surfaces of the opposed surfaces of the cold storage container, when a cold storage body filled with a cold storage solvent in the cold storage container is disposed above the cold storage target, it has been found that cold air can be applied to the cold storage target below, and the temperature rise of the cold storage target can be effectively suppressed.

[0007] That is, in the present technology, there is provided a cold storage container having an accommodation region for accommodating a cold storage solvent inside, the cold storage container including a pair of main surfaces arranged opposite to each other, and at least one cold air downward flow forming hole penetrating between the pair of main surfaces. Of the distances between two points that constitute the outer edge of the cold air downward flow forming hole and are located with the cold air downward flow forming hole therebetween, the shortest distance may be 14 mm or less, or may be 10 mm or less. In the cold storage container of the present technology, the outer edge of the cold air downward flow forming hole formed on at least one of the main surfaces may be R-processed. Further, in the cold storage container of the present technology, the outer edge of the cold air downward flow forming hole formed on at least one of the main surfaces may extend in a direction intersecting the main surface.

[0008] Next, the present technology provides a cold storage body filled with a cold storage solvent in the cold storage container of the present technology.

Brief Description of the Drawings

[0009]

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Embodiments for Carrying Out the Invention

[0010] Hereinafter, preferred embodiments for carrying out the present technology will be described. The embodiments described below show examples of typical embodiments of the present technology, and any of the embodiments can be combined. Also, the scope of the present technology is not construed narrowly by these.

[0011] [Cold Storage Container] The cold storage container according to the present technology is a cold storage container having an accommodation region for accommodating a cold storage solvent inside, and includes a pair of main surfaces arranged opposite to each other, and at least one cold air downflow forming hole penetrating between the pair of main surfaces.

[0012] The cold storage container of the present technology becomes a cold storage body having a cold storage function by filling the accommodation region with a cold storage solvent.

[0013] Here, "cold storage" means storing thermal energy that becomes relatively low in temperature through the transfer of thermal energy and being able to extract that energy when needed. "Cold storage solvent" means a solvent having the function of cold storage. A cold storage body filled with a cold storage solvent can keep the object to be cooled, such as food, at a low temperature by being placed around the object to be cooled.

[0014] <Containment area> The shape of the containment area for containing the cold storage solvent inside the cold storage container according to the present technology is not particularly limited as long as it can contain the cold storage solvent and has at least one cold air downward flow forming hole that penetrates between a pair of main surfaces as described above. It can be designed in any shape according to the characteristics of the cold storage solvent to be used and the purpose of use of the cold storage container.

[0015] <Main surface> The cold storage container according to the present technology has a plate-like shape with a pair of main surfaces arranged opposite to each other. For example, when accommodating the cold storage body according to the cold storage container of the present technology together with the object to be cooled in a cold storage box to cool the object to be cooled, the cold storage body is less likely to become a three-dimensional obstacle to the accommodation of the object to be cooled and erode the accommodation volume of the object to be cooled in the cold storage box.

[0016] Here, "main surface" refers to the surface among the surfaces forming the outer edge of the cold storage container of the present technology that is intended to be in contact with or close to the object to be cooled and the surface arranged opposite to that surface. Since the main surface can increase the area of the surface that can be in contact with or close to the object to be cooled, usually, it is the surface with the largest area among the surfaces forming the outer edge of the cold storage container of the present technology. However, depending on the shape of the object to be cooled for the purpose and the usage conditions of the cold storage body, any surface may be set as the main surface.

[0017] Here, "contact" means a state of directly touching the object, and "proximity" means a state of being at a close distance to the object but not physically touching it.

[0018] The shape of a pair of opposing main surfaces provided in the cold storage container according to the present technology is not particularly limited, and can take any shape according to the shape of the cold storage box or the object to be cooled. In view of the fact that the shape of a general cold storage box is a rectangular parallelepiped shape, by making it a substantially square shape, when used in the above general cold storage box, the cold storage body according to the cold storage container of the present technology is less likely to erode the accommodation volume of the object to be cooled in the cold storage box, and is less likely to become a three-dimensional obstacle when accommodating the object to be cooled.

[0019] Also, in the cold storage container of the present technology, the pair of main surfaces may have the same shape, but may not have the same shape. Furthermore, arbitrary processing such as forming irregularities may be performed on one or both surfaces of the main surface according to the characteristics of the object to be cooled for the purpose and the usage conditions of the cold storage body.

[0020] The distance between the opposing main surfaces of the cold storage container of the present technology is not particularly limited, but by increasing the distance, the amount of the cold storage solvent that can be filled increases, so the cold storage effect is improved. On the other hand, if the distance between the main surfaces is too long, there is a risk of eroding the accommodation volume of the object to be cooled in the cold storage box. Therefore, it is preferable to set an arbitrary distance according to the capacity of the cold storage box, the characteristics of the cold storage solvent to be filled, and the usage conditions of the cold storage body.

[0021] As the distance between the opposing main surfaces of the cold storage container of the present technology, it can be adjusted to, for example, 4 cm, 3 cm, 2.2 cm, etc. according to the capacity of the cold storage box.

[0022] Note that the cold storage body according to the cold storage container of the present technology can effectively form a cold air descending flow formed by a cold air descending formation hole described later by being disposed above the object to be cooled. The upper part of the object to be cooled means that at least a part of the cold storage body is above the upper surface of the object to be cooled, whereby a cold air descending flow can be formed in the direction of the object to be cooled.

[0023] The cold storage container according to the present technology can preferably use a container manufactured by a known manufacturing method using a known material that can be used as a container for the cold storage body.

[0024] <Cold air downflow formation hole> The cold storage container according to the present technology includes at least one cold air downflow formation hole that penetrates between the pair of main surfaces.

[0025] In this specification, "cold air" refers to air that is cooled by the cold storage body and has a relatively increased density in the vicinity of the cold storage body, and "warm air" refers to air that has not been cooled by the cold storage body (air whose density has not substantially changed).

[0026] "Cold air downflow" refers to the flow in which cold air with a high density descends due to gravity. As described above, the "cold air downflow formation hole" formed on the main surface of the cold storage container of the present technology is a flow in which air that is cooled by the cold storage body and has a relatively increased density descends due to gravity in the vicinity of the cold storage body, so that cold air forms a flow passing through the cold air downflow formation hole. In addition, the cold air further cooled on the surface of the cold air downflow formation hole can strengthen the flow of the cold air downflow.

[0027] It is preferable that the outer edge of the cold air downflow formation hole provided in the cold storage container according to the present technology is formed close enough not to allow warm air to pass through. Specifically, among the distances between two points that constitute the outer edge of the cold air downflow formation hole and are located across the cold air downflow formation hole, the shortest distance is preferably 14 mm or less, more preferably 10 mm or less, and particularly preferably 6 mm or less. By setting the upper limit of the range of the shortest distance among the distances between two points that constitute the outer edge of the cold air downflow formation hole and are located across the cold air downflow formation hole within the above range, it is possible to effectively suppress the passage of warm air through the cold air downflow formation hole. Thereby, the temperature rise of the object to be kept cold can be effectively suppressed.

[0028] Here, the "outer edge of the cold air downward flow forming hole" coincides with the outer edge of the cold air downward flow formed by the cold air downward flow forming hole, and does not include the processed area when processing the outer edge of the cold air downward flow forming hole described later. Further, "processing the outer edge of the cold air downward flow forming hole" means processing the area close to the outer edge of the cold air downward flow forming hole on the main surface, and usually, the shape of the outer edge does not change due to the processing.

[0029] The two points that constitute the outer edge of the cold air downward flow forming hole, among the distances between the two points located across the cold air downward flow forming hole, the lower limit of the range of the shortest distance is not particularly limited as long as it is within the range where the cold air downward flow can be formed, and can be set within any range that can be molded. For example, it can be set within a range of 1 mm or more, 2 mm or more, 3 mm or more, 4 mm or more, etc.

[0030] Here, "between two points located across the cold air downward flow forming hole" means between two points located across the width of the cross-section in a direction intersecting (orthogonal) to the flow direction of the cold air downward flow formed by the cold air downward flow forming hole.

[0031] The shape of the cold air downward flow forming hole is not particularly limited as long as it can form a cold air downward flow, and for example, any shape such as circular, elliptical, polygonal, slit-shaped, etc. can be adopted.

[0032] For example, when the shape of the cold air downward flow forming hole is circular, among the two points that constitute the outer edge of the cold air downward flow forming hole, the shortest distance among the distances between the two points located across the cold air downward flow forming hole is the shortest distance among the two points located across the width of the cross-section of the circle, so it is the two points that form the diameter of the circle.

[0033] The inlet and outlet of the cold air downflow formation holes can be designed at arbitrary positions on the respective main surfaces arranged opposite to each other according to the shape of the object to be cryopreserved and the usage conditions of the heat storage body, so that the flow of the cold air downflow can be adjusted. For example, by providing the inlet and outlet of the cold air downflow formation holes at opposite positions on the respective main surfaces arranged opposite to each other, the cold air downflow formation holes are arranged in a direction perpendicular to the main surface, and the flow direction of the cold air downflow can be made perpendicular to the main surface.

[0034] In this specification, for convenience, the expressions "inlet" and "outlet" of the cold air downflow formation holes are used, but the inlet and outlet are not clearly distinguishable, and when one is defined as the inlet, the other is the outlet.

[0035] The number of cold air downflow formation holes provided in the heat storage container according to the present technology is not particularly limited as long as the heat storage body according to the heat storage container of the present technology can form cold air in the vicinity of the surface of the heat storage body and form a flow in which the cold air descends due to gravity, and any number of cold air downflow formation holes of 1 or more can be preferably designed.

[0036] Furthermore, the ratio of the area of the cold air downflow formation holes in the surface of the main surface of the heat storage container according to the present technology is not particularly limited as long as the heat storage body according to the heat storage container of the present technology can form cold air in the vicinity of the surface of the heat storage body and form a flow in which the cold air descends due to gravity.

[0037] The length from the inlet to the outlet of the cold air downflow formation holes provided in the heat storage container according to the present technology (the depth from the inlet to the outlet of the cold air downflow formation holes) usually depends on the distance between the opposite main surfaces of the heat storage container. The longer the length, the more suitably the cold air can be cooled on the surface of the cold air downflow formation holes and its temperature can be maintained or cooled. On the other hand, as described above, if the distance between the main surfaces is too long, there is a risk of eroding the accommodation volume of the object to be cryopreserved in the cold storage box. Therefore, it is preferable to set an arbitrary distance according to the capacity of the cold storage box, the characteristics of the heat storage solvent to be filled, and the usage conditions of the heat storage body.

[0038] In the cold storage container according to the present technology, the outer edge of the cold air downward flow forming hole is processed so that the cold air formed near the surface of the cold storage body according to the cold storage container of the present technology flows into the cold air downward flow forming hole. As a result, the cold air formed near the surface of the cold storage body according to the cold storage container of the present technology easily descends along the contour of the processed surface, and the cold storage body can cool new air to form cold air. Thereby, the flow velocity of the cold air downward flow can be increased, and the temperature rise of the object to be kept cold can be effectively suppressed.

[0039] As an example of the processing of the outer edge of the cold air downward flow forming hole described above, for example, there is R processing in which the cross-sectional area is processed to become smaller from the entrance to the exit direction of the cold air downward flow forming hole. In addition, in this case, the R processing is not limited to a curved surface as long as the cross-sectional area is processed to become smaller from the entrance to the exit direction of the hole, and a flat surface or the like may be combined and formed as necessary.

[0040] The processing of the outer edge of the cold air downward flow forming hole described above may be performed on one of the main surfaces of the cold storage container according to the present technology, or may be performed on both main surfaces.

[0041] In the cold storage container according to the present technology, the outer edge of the cold air downward flow forming hole formed on at least one of the main surfaces may extend in a direction intersecting the main surface. Thereby, the length from the entrance to the exit of the cold air downward flow forming hole can be increased, and the cold air can be suitably cooled on the surface of the cold air downward flow forming hole, and its temperature can be maintained or further cooled.

[0042] Here, the "direction intersecting the main surface" refers to the direction in which the exit is arranged with respect to the entrance of the cold air downward flow forming hole formed on each of the opposing main surfaces, and can be adjusted in an arbitrary direction by adjusting the position of the exit with respect to the entrance of the cold air downward flow forming hole.

[0043] The processing of the outer edge of the cold air downward flow forming hole described above may also be performed on one of the main surfaces of the cold storage container according to the present technology, or may be performed on both main surfaces.

[0044] The outer edge on the inlet side of the cold air downflow forming hole in the cold storage container according to the present technology is R-processed, and the outer edge on the outlet side of the cold air downflow forming hole may be formed to extend in a direction intersecting the main surface. By R-processing the outer edge on the inlet side of the cold air downflow forming hole, the cold air formed near the surface of the cold storage body easily descends along the contour of the processed surface, and since the length from the inlet to the outlet of the cold air downflow forming hole becomes longer, the temperature of the cold air can be maintained or further cooled.

[0045] The cold storage container of the present technology includes a cold air downflow forming hole, so that the surface area of the cold storage container increases substantially by the surface area of the cold air downflow forming hole. As a result, when cooling the cold storage body filled with the cold storage solvent in the cooling chamber, thermal energy can be efficiently transferred, and the time required for cold storage can be shortened.

[0046] <Filling port> The cold storage container of the present technology may be provided with a filling port for filling the cold storage solvent at an arbitrary position. By providing a filling port in the cold storage container, the cold storage solvent can be efficiently filled into the storage area of the cold storage container to form a cold storage body.

[0047] <Other configurations> The cold storage container of the present technology may be provided with other configurations other than the above-described configurations as necessary, as long as the desired physical properties are not significantly impaired. Examples of other configurations include a handle part for facilitating gripping of the cold storage body, and when the cold storage body is bundled with a restraint means such as a band, a rope, or a mold, a receiving part for facilitating fixing by the restraint means for facilitating the restraint.

[0048] <Cold storage solvent> The cold storage solvent filled in the cold storage container of the present technology is not particularly limited as long as it is a solvent having a cold storage function. For example, known cold storage solvents such as water, ethanol, and ethylene glycol can be preferably used. These may be used alone or in combination.

[0049] Furthermore, the cold storage solvent may contain any component that can be used as a component of the cold storage solvent, such as a gelling agent or a freezing point depressant, according to the usage conditions of the cold storage body, the shape of the cold storage container, and the like.

[0050] The gelling agent that can be used in the cold storage solvent is not particularly limited as long as it binds by interaction with the solvent to be used and gels. For example, organic compounds such as carboxymethyl cellulose, pectin gum, and glucomannan can be mentioned. These may be used alone or in combination.

[0051] The freezing point depressant that can be used in the cold storage solvent is not particularly limited. For example, ammonium salts such as ammonium chloride, chloride salts such as sodium chloride, potassium chloride, calcium chloride, and magnesium chloride, nitrates, sulfates, etc. can be mentioned.

[0052] The cold storage solvent may contain other components as necessary, as long as the desired physical properties are not significantly impaired. Examples of other components include various additives such as preservatives and colorants. These may be contained singly or in any combination and ratio of two or more.

[0053] Hereinafter, specific embodiments of the cold storage container according to the present technology will be described with reference to the drawings. Note that the embodiments shown below are examples of the embodiments of the present technology, and the present technology is not to be construed as being limited to the contents of these embodiments in any way.

[0054] <1 First Embodiment> FIG. 1 is an image view of an example of a cold storage body filled with a cold storage solvent in the cold storage container of the present technology as seen from the side of one main surface. In the central portion of the main surface 1 of the cold storage container related to the cold storage body 10 according to the present embodiment shown in FIG. 1, one slit-shaped cold air downward flow forming hole 2 is formed so as to penetrate toward the other main surface arranged opposite to the main surface 1.

[0055] Of the two points that constitute the outer edge of the cold air downflow formation hole in this embodiment, and among the distances between the two points that are located with the cold air downflow formation hole therebetween, the shortest distance is the shortest distance among the two points that are located with the two sides of the slit therebetween. For example, the distance between the above two points is the width of the slit in the direction intersecting (orthogonal) to the direction in which the slit extends. In FIG. 1, these two points are indicated as L.

[0056] The outer edge of the cold air downflow formation hole 2, which is the portion where the main surface 1 intersects with the side surface of the cold air downflow formation hole, may not be subjected to special processing, but may be processed as shown in FIG. 2 or FIG. 3.

[0057] FIG. 2 is an image diagram showing an example of the shape of the processed outer edge of the cold air downflow formation hole. In FIG. 2, in the state where the main surface 1 of the cold storage body 10 in which the outer edge P of the cold air downflow formation hole is R-processed is placed on the upper side, the vicinity of the R-processed region of the cold air downflow formation hole 2 is shown. It can be confirmed from the figure that the outer edge P of the cold air downflow formation hole 2 formed on the upper main surface 1 of the cold storage body 10 related to the cold storage container is R-processed.

[0058] The arrow in FIG. 2 indicates the flow of cold air in this state. Since the outer edge of the cold air downflow formation hole 2 is R-processed, the cold air formed near the surface of the cold storage body 10 has a higher density than the surrounding air. Therefore, as shown by the arrow in the figure, it descends along the contour of the R-processed surface, passes through the cold air downflow formation hole 2, and the flow of the cold air downflow is strengthened. Thereby, the temperature rise of the object to be kept cold can be effectively suppressed.

[0059] Next, Figure 3 shown below is an image diagram showing a modified example of the shape of the outer edge where the cold air downflow formation holes are processed. In Figure 3, among the cold storage body 10, the vicinity of the R-processed region of the cold air downflow formation hole 2 is shown in a state where the main surface 1 with the outer edge P of the cold air downflow formation hole R-processed is placed on the upper side. From the figure, it can be confirmed that the outer edge P on the inlet side of the cold air downflow formation hole 2 formed on the upper main surface 1 of the cold storage body 10 related to the cold storage container is R-processed, and the outer edge on the outlet side of the cold air downflow formation hole 2 extends in a direction intersecting the lower main surface 1.

[0060] The arrow in Figure 3 indicates the flow of cold air in this state. Since the cold air formed near the surface of the cold storage body 10 is denser than the surrounding air due to the R-processing of the outer edge P on the inlet side of the cold air downflow formation hole 2, as shown by the arrow in the figure, it descends along the contour of the R-processed surface and passes through the cold air downflow formation hole 2, strengthening the flow of the cold air downflow. Furthermore, since the outer edge P on the outlet side of the cold air downflow formation hole 2 extends in a direction intersecting the main surface 1, the length from the inlet to the outlet of the cold air downflow formation hole 2 becomes longer, so the temperature of the cold air can be maintained or further cooled.

[0061] Note that the cold storage container according to the present embodiment may change the configuration of the form with reference to the conditions described in this specification in addition to the configuration shown above.

[0062] Figure 4 is an image diagram showing an example of the use of the cold storage body of the present technology. Specifically, it is an example in which the cold storage body 10 of the present technology is arranged above the object to be kept cold 30 in the cold storage box 20.

[0063] Figure 5 is an image diagram showing the relationship between the arrangement of the object to be kept cold 30 and the cold storage body 10 as seen from above when the cold storage body 10 is used as shown in Figure 4. By arranging the cold storage body 10 above the object to be kept cold 30, the cold air formed by the cold air downflow formation hole 2 provided in the cold storage body 10 flows toward the object to be kept cold 30.

[0064] Figure 6 shows the state in which, when a cold storage body is used as shown in Figures 4 and 5, the cold air C formed by the cold air downward flow forming holes 2 provided in the cold storage body 10 flows toward the side of the object to be cold-insulated 30. The flow of the cold air C formed by the cold air downward flow forming holes 2 hits the object to be cold-insulated 30, and can effectively suppress the temperature rise of the object to be cold-insulated.

[0065] In addition, in Figures 4 to 6, an example in which a PET bottle is used as an example of the object to be cold-insulated is shown. However, the object to be cold-insulated that can be cold-insulated by the cold storage body of the present technology is of course not limited to this, and any object can be suitably cold-insulated.

[0066] Also, in Figures 4 to 6, an example in which the cold storage body is arranged above the object to be cold-insulated is shown in order to utilize the effect of the cold air downward flow forming holes provided in the cold storage body of the present technology. However, the usage form of the cold storage body of the present technology is not necessarily limited to the form of this example, and it may be used for any form in which a normal cold storage body can be used.

[0067] Next, an example of an embodiment in which the shape and number of the cold air downward flow forming holes provided in the cold storage body of the present technology are changed will be described. Note that these are examples of the shape and number of the cold air downward flow forming holes, and the shape and number of the cold air downward flow forming holes are not limited to those shown here, and can be changed with reference to the conditions described in this specification according to the characteristics of the cold storage solvent to be used and the purpose of use of the cold storage container.

[0068] <2 Second Embodiment> Figure 7 is an image view of a modified example of a cold storage body filled with a cold storage solvent in the cold storage container of the present technology as viewed from the side of one main surface. In the center portion of the main surface 1 of the cold storage container related to the cold storage body 10 according to the present embodiment shown in Figure 7, three slit-shaped cold air downward flow forming holes 2 are formed so as to penetrate toward the other main surface arranged to face the main surface 1. In the cold storage body 10 according to the present embodiment shown in Figure 7, a plurality of cold air downward flow forming holes 2 are formed in a direction intersecting (orthogonal) to the direction in which the slit extends.

[0069] <3 Third Embodiment> FIG. 8 is an image view of a modified example of a cold storage body filled with a cold storage solvent in a cold storage container of the present technology, as viewed from the side of one main surface. In the central portion of the main surface 1 of the cold storage container related to the cold storage body 10 according to the present embodiment shown in FIG. 8, six slit-shaped cold air downward flow forming holes 2 are formed so as to penetrate toward the other main surface arranged opposite to the main surface 1. In the cold storage body 10 according to the present embodiment shown in FIG. 8, a plurality of cold air downward flow forming holes 2 are formed in the direction in which the slit extends.

[0070] <4 Fourth Embodiment> FIG. 9 is an image view of a modified example of a cold storage body filled with a cold storage solvent in a cold storage container of the present technology, as viewed from the side of one main surface. In the central portion of the main surface 1 of the cold storage container related to the cold storage body 10 according to the present embodiment shown in FIG. 9, a plurality of circular cold air downward flow forming holes 2 are formed in a staggered pattern so as to penetrate toward the other main surface arranged opposite to the main surface 1.

[0071] Note that the cold storage container according to the second to fourth embodiments, or the cold storage body filled with the cold storage solvent in the cold storage container, may preferably adopt the same configuration as that of the first embodiment, and may be used in the same form as the usage form shown in the first embodiment.

[0072] Note that the present technology can also be configured as follows. [1] A cold storage container having an accommodation region for accommodating a cold storage solvent inside, a pair of opposed main surfaces, and at least one cold air downward flow forming hole penetrating through the pair of main surfaces, a cold storage container. [2] The cold storage container according to [1], wherein, among the distances between two points that constitute the outer edge of the cold air downward flow forming hole and are located with the cold air downward flow forming hole therebetween, the shortest distance is 14 mm or less. [3] The cold storage container according to [1], wherein, among the distances between two points that constitute the outer edge of the cold air downward flow forming hole and are located with the cold air downward flow forming hole therebetween, the shortest distance is 10 mm or less. [4] The cold air downflow forming hole is slit-shaped, and the cold storage container according to any one of [1] to [3]. [5] The outer edge of the cold air downflow forming hole formed on at least one main surface is R-processed, and the cold storage container according to any one of [1] to [4]. [6] The outer edge of the cold air downflow forming hole formed on at least one main surface extends in a direction intersecting with the main surface, and the cold storage container according to any one of [1] to [5] for cold storage. [7] A cold storage body filled with a cold storage solvent in the cold storage container according to any one of [1] to [6]. [8] The cold storage body according to [7], which is arranged and used above the object to be kept cold.

Example

[0073] Hereinafter, the present technology will be described more specifically using examples. Note that the present technology is not limited to the contents of the examples shown below.

[0074] In an atmosphere with an outside air temperature of 35 °C, as shown in the usage example of Fig. 4, when the cold storage body is arranged and used above the four PET bottles as the objects to be kept cold in the cold storage box, the temperature after 5 hours from the start of the test was reproduced by CAE (Computer Aided Engineering) using analysis software (SCFlow by CRADLE).

[0075] The cold storage body used above was obtained by changing the width of the slit of the slit-shaped cold air downflow forming hole (the value of the shortest distance among the distances between two points that form the outer edge of the cold air downflow forming hole and are located across the cold air downflow forming hole) of the cold storage container shown in the first embodiment to the values shown in Table 1. Table 1 shows the reproduction results of the temperatures after 5 hours from the start of the test at the center and outside of the product.

[0076] Note that the center of the product refers to the central region between the second and third of the four PET bottles arranged in the cold storage box, and the outside of the product refers to the outer region of the first or fourth one.

[0077] <Initial Conditions of Cold Storage Medium> ◆ Cold storage agent: Initial temperature -20°C (1) Liquid phase: Density 998 kg / m 3 Specific heat 4100 J / kgK Thermal conductivity 0.56 W / mK (2) Solid phase: Density 900 kg / m 3 Specific heat 2050 J / kgK Thermal conductivity 2.1 W / mK ◆ Cold storage agent air layer: Initial temperature -20°C Air (non-compressed): Density, specific heat, and thermal conductivity are general values ◆ Cold storage agent case (panel): Initial temperature -20°C Polyethylene resin (300K): Density, specific heat, and thermal conductivity are general values Virtual thickness 1 mm ◆ Solidification and melting: Liquidus temperature 0°C, solidus temperature -3°C Latent heat 31400 J / kg

[0078] <Initial Conditions of the Object to be Insulated> ◆ Object to be insulated (PET bottle): Initial temperature 5°C Contents: Water 500 cc: Density, specific heat, and thermal conductivity are general values ◆ Product air layer: Initial temperature 5°C Air (non-compressed): Density, specific heat, and thermal conductivity are general values ◆ Product bottle (panel): Initial temperature 5°C PET density 1350 kg / m 3 Specific heat 1300 J / kgK, thermal conductivity 0.2 W / mK ◆ Insulated box: Initial temperature 10°C EPS density 33.3 kg / m 3 Specific heat 1800 J / kgK, thermal conductivity 0.031 W / mK ◆ Insulated box space: Initial temperature 10°C Air (non-compressed): Density, specific heat, and thermal conductivity are general values

[0079]

Table 1

[0080] As a result, regarding the outside of the product, although there is no significant temperature fluctuation depending on the value of the width of the slit of the cold air descending flow formation hole, it can be confirmed that there is a difference in the cold storage effect depending on the value of the width of the slit at the center of the product where the cold air descending flow formed by the cold air descending flow formation hole hits.

[0081] Figure 10 is a graph showing the relationship between the temperature at the center of the product and the value of the width of the slit shown in Table 1. By providing a cold air descending flow formation hole having an outer edge close enough not to allow warm air to pass through, it can be confirmed that a cold air descending flow can be formed and the temperature rise of the object to be cold-stored can be effectively suppressed.

[0082] Figure 11 shows the flow velocity and temperature distribution of a cold storage body filled with a cold storage solvent in a cold storage container provided with a cold air descending flow formation hole with a slit width of 6 mm in the above embodiment. 11A shows the flow velocity distribution, and 11B shows the temperature distribution.

[0083] From 11A, it can be confirmed that cold air is descending toward the side of the object to be cold-stored inside the slit related to the cold air descending flow formation hole. Also, from 11B, it can be confirmed that the area at the center of the product, which is the object to be cold-stored, is effectively cooled by the cold air descending flow.

[0084] Figure 12 shows the flow velocity and temperature distribution of the cold storage body in the case without a slit among the above. 12A shows the flow velocity distribution, and 12B shows the temperature distribution.

[0085] From 12A and 12B, it can be confirmed that the cooling effect of the area at the center of the product is lower compared to the case shown in Figure 11 because no cold air descending flow is formed.

[0086] Figure 13 shows the flow velocity and temperature distribution of a cold storage body provided with a 20-mm slit, which corresponds to the comparative example among the above. 13A shows the flow velocity distribution, and 13B shows the temperature distribution.

[0087] Compared with the case shown in FIGS. 13A to 11, it can be confirmed that the flow of cold air is slow. Further, from 13B, it can be confirmed that warm air is flowing into the slit, and compared with the case shown in FIG. 11, it can be confirmed that the cooling effect in the central region of the product is low. That is, in this case, the outer edge of the slit is not formed close enough to prevent the warm air from passing through, and it does not serve as a cold air downward flow forming hole. As a result, a cold air downward flow cannot be formed, and the temperature rise of the object to be cold-stored cannot be suppressed.

Explanation of Signs

[0088] 10 Cold storage body (cold storage container) 1 Main surface 2 Cold air downward flow forming hole 20 Cold storage box 30 Object to be cold-stored (PET bottle) L Distance between two points located across the cold air downward flow forming hole, among which the distance between the two points with the shortest distance P Outer edge C Cold air

Claims

1. A cold storage container having an inner storage area for storing a cold storage medium, a pair of opposed main surfaces, and at least one cold air downflow forming hole penetrating through the pair of main surfaces. Cold storage container.

2. The cold storage container according to claim 1, wherein, among the distances between two points that constitute the outer edge of the cold air downflow forming hole and are located with the cold air downflow forming hole therebetween, the shortest distance is 14 mm or less.

3. The cold storage container according to claim 1, wherein, among the distances between two points that constitute the outer edge of the cold air downflow forming hole and are located with the cold air downflow forming hole therebetween, the shortest distance is 10 mm or less.

4. The cold storage container according to claim 1, wherein the outer edge of the cold air downflow forming hole formed on at least one main surface is R-processed.

5. The cold storage container according to claim 1, wherein the outer edge of the cold air downflow forming hole formed on at least one main surface extends in a direction intersecting with the main surface.

6. A cold storage body filled with a cold storage medium in the cold storage container according to any one of claims 1 to 5.

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