JP7460286B2 - Cool storage container and cool storage material - Google Patents

Description

The present disclosure relates to a cold storage material container and a cold storage material formed by accommodating a cold storage medium in the cold storage material container.

BACKGROUND ART Conventionally, flat plate-shaped cold storage material containers have been known (see, for example, Patent Document 1).

JP2004-293841A (Figure 1)

There is a demand for a cold storage material container that can improve the cold storage performance of the cold storage material.

The first aspect of the invention made to solve the above problem is a cold storage material container having a substantially rectangular plate-like shape and a flat storage area inside for storing a cold storage medium, the storage area is provided with a first storage section that is plate-like with a first thickness and occupies 40 to 80% of the total area of the planar shape of the storage area, the portion of the storage area that is equal to or greater than the first thickness occupies 70% or more of the total area of the planar shape of the storage area, and the storage area is provided with a second storage section that is 1.30 to 3.05 times the first thickness and is biased toward the outer edge including each of the four corners of the cold storage material container.

A second aspect of the invention is the cooling storage material container according to the first aspect, in which the second storage section occupies an area of 20% or more of the total area of the planar shape of the storage area.

A third aspect of the invention is the cold storage material container according to the first or second aspect, in which the second storage section includes the thickest part in the storage area.

A fourth aspect of the invention is a cold storage material container according to any one of the first to third aspects, in which the center of the storage area is included in the first storage section or is surrounded by the first storage section and has a thickness less than the first thickness.

The fifth aspect of the invention is the cold storage material container according to any one of the first to fourth aspects, in which the ratio of the volume of the second storage section to the entire storage area is 35 to 70%.

A sixth aspect of the invention is the cold storage material container according to any one of the first to fifth aspects, in which the ratio of the volume of the first storage section to the entire storage area is 30 to 65%.

A seventh aspect of the invention is the aspect according to any one of the first to sixth aspects, wherein the thickness of the second housing part is 1.75 to 2.25 times the first thickness. This is the cold storage material container described in .

An eighth aspect of the invention is the aspect according to any one of the first to seventh aspects, wherein the cold storage material container is made of resin, and the wall thickness of the cold storage material container is 0.5 to 3.0 mm. This is the cold storage material container described above.

In a ninth aspect of the invention, the first storage part extends from the center to the outer edge of the cold storage material container, the second storage part has a plate shape with a second thickness, and the second storage part has a plate shape with a second thickness. The cold storage material container according to any one of the first to eighth aspects, wherein the thickness is 9 to 23 mm thicker than the first thickness.

The tenth aspect of the invention is the cold storage material container according to any one of the first to ninth aspects, in which a positioning engagement portion is provided in the portion of the cold storage material container that covers the second storage portion in the thickness direction, and which engages the cold storage material containers with each other in a concave-convex manner when the cold storage material containers are stacked on top of each other.

In an eleventh aspect of the invention, the positioning engagement portion includes an engagement protrusion that protrudes to one of the front and back sides of the cold storage material container, and protrudes to the other of the front and back sides with approximately the same amount of protrusion as the engagement protrusion, and The cold storage material container according to the tenth aspect, comprising: an enclosing protrusion that receives an engagement protrusion provided on the other cold storage material container when the cold storage material container is stacked on the other cold storage material container. It is.

The twelfth aspect of the invention is the cold storage material container according to any one of the first to eleventh aspects, in which the cold storage material container has a substantially rectangular shape, and one end of the cold storage material container in the longitudinal direction is formed with a long hole-shaped manual insertion portion extending in the lateral direction of the cold storage material container.

A thirteenth aspect of the invention is the cold storage material container according to any one of the first to twelfth aspects, in which the second storage section is formed in a frame shape surrounding the first storage section.

The 14th aspect of the invention is a cold storage material container according to any one of the first to thirteenth aspects, in which a through hole or a recess is formed in the center of the cold storage material container.

The fifteenth aspect of the invention is a cold storage material container according to any one of the first to fourteenth aspects, in which a recess is formed midway between two opposing sides of the cold storage material container, recessed inward in the direction of the opposite sides.

A sixteenth aspect of the invention is a cold storage material comprising the cold storage medium sealed in the cold storage material container according to any one of the first to fifteenth aspects.

In the first aspect and the sixteenth aspect of the invention, the cold storage material container has a substantially rectangular plate shape, and a flat storage area in which the cold storage medium is accommodated is provided inside the cold storage material container. The accommodation area is provided with a first accommodation part that is plate-shaped and has a first thickness and occupies 40 to 80% of the total planar area of the accommodation area. The above portion occupies 70% or more of the total area of the planar shape of the storage area. Further, the accommodation area is provided with a second accommodation portion having a thickness of 1.30 to 3.05 times the first thickness. The second accommodating section, which is thicker than the first accommodating section, is unevenly distributed in a portion near the outer edge including positions near the four corners of the cold storage material container. As a result, compared to a cold storage material using a conventional cold storage material container that is flat plate-shaped and has a uniform storage area thickness, the frozen cold storage medium is It is possible to suppress the outer edge of the material container, particularly the corner portions, from easily melting, and it is possible to improve the cold storage performance of the cold storage material. Moreover, as a result, it is possible to reduce the amount of the cold storage medium while maintaining the cold storage performance, and therefore it is possible to reduce the weight of the cold storage medium.

In the second aspect of the invention, the second storage section occupies 20% or more of the total area of the planar shape of the storage area, which makes it possible to further improve the cold storage performance of the cold storage material.

In the third aspect of the invention, the second storage section located near the outer edge of the cold storage material container, including each of the four corners, includes the thickest part in the storage area, so that it is possible to further prevent the refrigerant from melting easily at the outer edge of the cold storage material container where the second storage section is located, and it is possible to further improve the cold storage performance of the cold storage material.

In the fourth aspect of the invention, the center of the storage area is included in the first storage section, or is surrounded by the first storage section and has a thickness less than the first thickness. Therefore, it is possible to make it easier to freeze the refrigerant storage medium near the center of the storage area, where the refrigerant storage medium is less likely to freeze.

In the fifth aspect of the invention, by setting the volume ratio of the second storage part to the entire storage area to be 35 to 70%, the cold storage material container can be It becomes possible to further improve the cold storage performance of Moreover, as a result, it is possible to further reduce the amount of the cold storage medium while maintaining the cold storage performance, and therefore it is possible to further reduce the weight of the cold storage medium.

In the sixth aspect of the invention, by setting the volume ratio of the first storage part to the entire storage area to be 30 to 65%, the cold storage material is It becomes possible to further improve the cold storage performance of Moreover, as a result, it is possible to further reduce the amount of the cold storage medium while maintaining the cold storage performance, and therefore it is possible to further reduce the weight of the cold storage medium.

In the seventh aspect of the invention, since the thickness of the second housing part is 1.75 to 2.25 times the thickness of the first housing part, it is possible to further improve the cold storage performance of the cold storage material. .

In the eighth aspect of the invention, since the wall thickness of the resin cold storage material container is 0.5 to 3 mm, it is possible to improve the cold storage performance of the cold storage material in which the cold storage medium is accommodated in the cold storage material container. At the same time, it becomes possible to obtain a cold storage material container with good strength and formability.

In the ninth aspect of the invention, the first storage section extends from the center to the outer edge of the cold storage material container. Therefore, when cold storage material containers containing a refrigerant storage medium are stacked in the thickness direction, a gap can be formed between the first storage sections of the cold storage material containers adjacent in the thickness direction. This makes it easier for cold air to pass through the gap when freezing the refrigerant storage medium, so that the cold storage material can be frozen faster. In addition, according to the present invention, the difference in thickness between the first and second storage sections is 9 to 23 mm, so that when the cold storage material containers are stacked in the thickness direction, a gap can be provided between the first storage sections into which a finger can be inserted. This makes it possible to easily hold the cold storage material container by pinching the first storage section.

In the tenth aspect of the invention, when the cold storage material containers are stacked on top of each other, the cold storage material containers can be easily positioned with respect to each other by the positioning engagement portion. As in the eleventh aspect of the invention, by configuring the positioning engagement part with protrusions provided on the front and back surfaces of the cold storage material container, compared to the case where the positioning engagement part is composed of a protrusion and a recess. This makes it possible to stabilize the placement of the cold storage material container. Furthermore, by making the protrusion amount of the engagement protrusion and the surrounding protrusion substantially the same, it becomes possible to further stabilize the placement of the cold storage material container.

In the twelfth aspect of the invention, a long hole-shaped manual insertion portion is provided at one end of the cold storage material container in the longitudinal direction, so that the cold storage material container can be gripped by inserting a finger into the manual insertion portion.

The second storage part may be provided only at the corner of the cold storage material container at the outer edge of the cold storage material container, or may have a frame shape surrounding the first storage part (the second storage part of the invention). 13 aspects).

In the fourteenth aspect of the invention, since the through hole or the recess is formed in the center of the cool storage material container, it is possible to shorten the freezing time of the cool storage medium near the center of the cool storage material container.

In the fifteenth aspect of the invention, a recess that is recessed inward in the opposite side direction is formed in the middle of two opposing sides of the cold storage material container, so that when the cold storage material container is placed adjacent to the other side in the opposite side direction, the cold storage material container is A gap will be provided between the material containers. Therefore, when freezing the cold storage medium of the cold storage material with such an arrangement, cold air can be passed through the gap, making it easier to freeze the cold storage medium. In addition, if the recess is formed so that the gap is large enough to allow fingers to be inserted, for example, when gripping the cold storage medium after it has been frozen, the cold storage medium can be gripped by inserting the fingers into the gap. It becomes easier to do.

FIG. 1 is a plan view of a heat storage material including a heat storage material container according to a first embodiment of the present disclosure; A-A cross-sectional view of the cooling material B-B cross section of the cold storage material (A) is a side view of the cold storage material container when viewed in the short direction, (B) is a side view of the cold storage material container when viewed in the longitudinal direction from the hand insertion portion side, and (C) is a side view of the cold storage material container when viewed in the longitudinal direction from the filling port side. CC sectional view of cold storage material container A plan view of adjacent cooling storage containers in the short side direction. (A) Side view of the cold storage material overlapping in the thickness direction, (B) Side sectional view of the engaging protrusion and surrounding protrusion of the cold storage material containers that are engaged with each other as seen from the longitudinal direction For each experimental example, (A) a plan view of the storage area of the cold storage material container, (B) a side view of the storage area of the cold storage material container, and (C) a table showing the results of the cold storage material test using the cold storage material container. (A) Side cross-sectional view of the test box, (B) Plan cross-sectional view of the test box, (C) Plan view of the heat storage material showing the surface temperature measurement positions (A) A plan view of a storage area for a cold storage material container, (B) a side view of a storage area for a cold storage material container, and (C) a plan view of a cold storage material container. (A) Plan view of a storage area for a cold storage material container, (B) Side view of a storage area for a cold storage material container, (C) Plan view of a storage area for a cold storage material container, and (D) Side view of a storage area for a cold storage material container. (A) Plan view of the storage area of the cold storage material container, (B) Side view of the storage area of the cold storage material container, (C) Plan view of the storage area of the cold storage material container, (D) Side view of the storage area of the cold storage material container figure

[First embodiment]
As shown in FIGS. 1 and 2, a cold storage material container 10 (hereinafter simply referred to as container 10) according to a first embodiment of the present disclosure has a substantially rectangular plate shape in plan view, and has a cold storage liquid inside. 11 (corresponding to the "cold storage medium" described in the claims). The container 10 is, for example, a blow-molded product made of resin and has thermal conductivity. The cold storage material 100, which is formed by enclosing the cold storage liquid 11 in the container 10, is used in a state where the cold storage liquid 11 is frozen. Note that the container 10 is transparent or translucent, so that whether or not the cool storage liquid 11 is frozen can be visually confirmed from the outside. Further, a filling port 11K for the cool storage liquid 11 is provided on one short side of the container 10, and the filling port 11K is closed with, for example, a cap or the like. Note that the cold storage material 100 may contain a gel-like cold storage medium instead of the cold storage liquid 11. Further, the container 10 may have a plate shape that is approximately square in plan view.

The wall thickness of the container 10 (thickness of the portion of the container 10 surrounding the storage area R) is preferably 0.5 to 3 mm. Thereby, it becomes possible to improve the cold storage performance of the cold storage material 100. Further, when the wall thickness of the container 10 is 0.5 mm or more, the strength of the container 10 can be easily ensured. When the wall thickness of the container 10 is 3 mm or less, molding by blow molding becomes easy.

As shown in FIGS. 2 and 3, the storage area R of the container 10 of this embodiment is provided with a plurality of storage parts each having a different thickness. Specifically, as shown in FIG. 5, the storage area R includes a first storage part 20A that includes the center of the container 10 (that is, the center of the storage area R), and a portion near the outer edge of the container 10. A second accommodating portion 20 unevenly distributed is provided.

As shown in FIG. 5, the first storage section 20A is plate-shaped, and in this embodiment, it is the part with the largest area (the part with the largest area of the planar shape) when viewed in the thickness direction in the storage region R. Specifically, the area of the planar shape of the first storage section 20A is 40 to 80% of the total area of the planar shape of the entire storage region R. In addition, the first storage section 20A is thinner than the second storage section 20 (i.e., the second storage section 20 is thicker than the first storage section 20A). Note that, as described above, in this embodiment, the center of the storage region R is included in the first storage section 20A, but the center of the storage region R may be surrounded by the first storage section 20A and have a thickness less than the first thickness. In this case, for example, a through hole (for example, a through hole in which the rib 16 described later is accommodated) or a recess may be provided in the center of the storage region R.

2 and 3, the second storage section 20 is provided with a plate-shaped thickest storage section 20B that is the thickest in the storage region R. The thickest storage sections 20B are located on the outer edge of the container 10, and in this embodiment, are provided at each of the four corners (four corners 15) of the container 10 (see FIGS. 1 and 5). Each thickest storage section 20B is generally rectangular and elongated in the longitudinal direction of the container 10.

As shown in FIG. 5, the second storage section 20 also has plate-shaped short side storage sections 20C provided on both short sides of the container 10. The short side storage section 20C has a thickness between the first storage section 20A and the thickest storage section 20B (see FIG. 3). In detail, the short side storage section 20C is elongated in the short direction of the container 10 and connects the thickest storage sections 20B of the two corners 15 on the short sides of the container 10.

In addition, in this embodiment, most of the parts other than the second accommodating part 20 in the accommodating area R are the first accommodating part 20A, and have a first thickness that is the thickness of the first accommodating part 20A. The thickness is the standard thickness of the container. The first accommodating portion 20A extends from the center of the accommodating area R to both long sides of the accommodating area R.

As shown in Figures 1 and 3, one short side (one end in the longitudinal direction) of the container 10 has a long hole-shaped manual insertion portion 13 that penetrates the container 10 in the thickness direction and extends in the short direction of the container 10. Therefore, the container 10 can be grasped by inserting a finger into the manual insertion portion 13. The manual insertion portion 13 is formed on one short side of the container 10, spanning the thickest storage portion 20B of both corners 15 and the short side storage portion 20C between them.

In this embodiment, when viewed from the thickness direction of the container 10, the first accommodating portion 20A occupies 40 to 80% of the total area (total area of the planar shape) of the accommodating region R, and The total area of the thickest accommodating part 20B occupies 20% or more of the total area of the accommodating region R (that is, the total area of the second accommodating part 20 also occupies 20% or more). Further, in the present embodiment, the first accommodating portion 20A and the second accommodating portion 20 occupy 70 to 100% of the total area of the planar shape of the accommodating region R, and 80 to 100% of the total area. Preferably, it accounts for 100%, and more preferably 90 to 100%. Note that the area of the accommodation area R and each accommodation section 20A, 20 (20B, 20C) when viewed from the thickness direction of the container 10 does not include the area of the through hole of the accommodation area R (for example, the area of the ribs described below). 16 area is not included).

The thickness of the second accommodating part 20 is 1.30 to 3.05 times the thickness (first thickness) of the first accommodating part 20A. From the viewpoint of cold storage performance, the thickness of the second housing part 20 is more preferably 1.75 to 2.25 times the first thickness, and 1.80 to 2.25 times the first thickness. It is more preferable that In addition, the portion of the accommodation area R that has a thickness equal to or greater than that of the first accommodation portion 20A (first thickness) occupies an area of 70% or more of the total area of the planar shape of the accommodation area R. It is preferable that it occupies 80% or more of the area, and more preferably that it occupies 90% or more of the area. In the example shown in FIGS. 2 and 3, for example, the thickness of the first accommodating part 20A is 13 mm, the thickness (second thickness) of the thickest accommodating part 20B is 28 mm, and the thickness of the first accommodating part 20A is 28 mm. The thickness of the side housing portion 20C is 18 mm.

In the container 10, from the viewpoint of cold storage performance, the ratio of the total volume of the second storage section 20 to the entire storage area R is preferably 35 to 70%, and preferably 35 to 65%. is more preferable. Further, from the viewpoint of cold storage performance, the volume ratio of the first storage section 20A to the entire storage area R is preferably 30 to 65%, more preferably 35 to 65%.

1 and 5, an outer edge recess 14 is formed at the middle of both long sides of the container 10, recessed toward the inside in the opposite side direction (in the present embodiment, toward the inside in the short side direction), and the outer edge recess 14 narrows the short side width of the first storage section 20A of the container 10. As a result, in the storage region R, the second storage section 20 (thickest storage section 20B) arranged at the corner 15 of the container 10 has a shape that protrudes more than the first storage section 20A in the short side direction. In detail, in the short side direction of the container 10, the corner 15 protrudes relatively due to the outer edge recess 14, so that the short side length of the container 10 (the width of the container 10) is maximum at the short side. On the other hand, the short side width at the center of the longitudinal direction of the container 10 (the width of the part where the first storage section 20A is provided) is minimum due to the provision of the outer edge recess 14. In this way, the outer edge recess 14 narrows the middle part of the container 10 in the longitudinal direction, causing the corners 15 to protrude outward in the lateral direction, which further prevents the frozen cold storage liquid 11 from melting easily at the corners 15. This makes it possible to make the cold storage performance of the container 10 more uniform in the longitudinal direction, and also improves the cold storage performance, which makes it possible to reduce the amount of cold storage liquid 11 and achieve weight reduction. The outer edge recess 14 has a trapezoidal shape that narrows toward the inside in the lateral direction when viewed from the thickness direction of the container 10. The outer edge recess 14 may also be provided on the short side of the container 10.

As shown in FIG. 6, when the containers 10 are arranged adjacent to each other in the lateral direction, a gap S1 is provided by the outer edge recess 14 between the adjacent long sides of the containers 10. Therefore, when freezing the cold storage liquid 11 of the cold storage material 100 with such an arrangement, cold air can be passed through the gap, making it easier to freeze the cold storage liquid 11. Furthermore, if the outer edge recess 14 is formed so that the gap has a size that allows a finger to be inserted, when the cold storage material 100 is held after the cold storage liquid 11 is frozen, the cold storage material 100 can be inserted by inserting the finger into the gap. becomes easier to grasp. The depth of the outer edge recess 14 is preferably 5 to 30 mm. When the depth of the outer edge recess 14 is 5 mm or more, cold air can easily pass through the gap S1 when freezing the cold storage liquid 11, and the freezing of the cold storage liquid 11 can be particularly fast. Further, when the depth of the outer edge recess 14 is 30 mm or less, when the cold storage material 100 is used adjacent to each other in the lateral direction, it becomes possible to particularly suppress a decrease in the cold insulation effect near the gap S1.

In this embodiment, the storage area R has a substantially symmetrical shape on the front and back sides of the container 10. That is, the second accommodating part 20 is thicker in a substantially symmetrical manner on the front and back than the first accommodating part 20A. Furthermore, a stepped portion 19 is formed at the boundary between each of the storage portions in the container 10. Specifically, the stepped portion 19 is formed by changing the thickness of the storage region R so as to be inclined with respect to the thickness direction of the container 10.

The plate-like first storage section 20A does not have to be made up of only parts of a strictly uniform thickness, and may be made up of parts with a thickness within a certain range. In that case, the average value of those thicknesses may be set as the thickness (first thickness) of the first storage section 20A. In this case, it is sufficient to include parts with a thickness within a range of, for example, ±10% of the average value in the same storage section 20A. Specifically, the first storage section 20A may include unevenness, inclined parts, etc. within the above range. Furthermore, the thickest storage section 20B and the short side storage section 20C do not have to be plate-like.

Note that, as shown in FIG. 1, the container 10 is formed with a plurality of ribs 16 that penetrate the first accommodating portion 20A. Specifically, as shown in FIG. 3, the rib 16 is a bottom portion of the cup portion 18 that protrudes toward each other from a pair of opposing walls 17 that face each other across the storage area R in the thickness direction of the container 10. It has a shape in which they are connected to each other. By providing the ribs 16, even when the cold storage liquid 11 expands, the container 10 can be prevented from expanding so that the opposing walls 17 move away from each other, and the container 10 can be prevented from bursting. Further, the cup portion 18 is open from the inside to the outside in the thickness direction. Therefore, in the cold storage material 100, cold air can enter into the cup part 18 from the opening of the cup part 18, and the cold storage liquid 11 near the center of the container 10 can be easily frozen.

Further, the center of the container 10 may be provided with a through hole penetrating in the thickness direction, such as the manual insertion portion 13, or a recessed portion that opens on the front or back surface of the container 10 may be provided. (For example, a cup part 18 may be provided and the recessed part may be formed in the inner part of the cup part 18.) By providing such a through hole or recess, it becomes possible to form a through hole or a thinner part than the first housing part 20A in the center of the storage area R, thereby preventing freezing of the cold storage liquid 11. It becomes possible to shorten the time.

1 and 4, the front and back surfaces of each corner portion of the container 10 (specifically, the portion of the container 10 that covers the thickest storage portion 20B in the thickness direction) are provided with a positioning engagement portion 30. The positioning engagement portion 30 includes an engagement protrusion 31 and an encircling protrusion 32 that protrude from the opposing wall 17. The engagement protrusion 31 is substantially frustum shaped. The encircling protrusion 32 is composed of a pair of semicircular arc-shaped protrusions that are coaxial and have the same diameter. The inner diameter of the protruding tip of the encircling protrusion 32 is larger than the outer diameter of the protruding tip of the engagement protrusion 31. The engagement protrusion 31 and the encircling protrusion 32 are arranged coaxially at positions that overlap in the thickness direction of the container 10. Furthermore, in each corner portion of the container 10, when the engagement protrusion 31 is provided on one of the front and back, the encircling protrusion 32 is arranged to be provided on the other of the front and back. In this embodiment, the arrangement of the engagement protrusions 31 and the surrounding protrusions 32 is the same between a pair of diagonally arranged corners 15 of the container 10, and the arrangement of the engagement protrusions 31 and the surrounding protrusions 32 on the front and back is reversed between the remaining pair of corners 15. In addition, the amount of protrusion from the corners 15 of the container 10 is approximately the same for the engagement protrusions 31 and the surrounding protrusions 32. The container 10 has the same shape when viewed from both sides in the thickness direction, and also has the same shape when viewed from both sides in the short direction.

FIG. 7A shows containers 10 that overlap in the thickness direction. In this way, the containers 10 are aligned so that the corner portions 15, which are thicker than the other portions, overlap each other. In this state, the engaging protrusions 31 and the surrounding protrusions 32 provided at mutually opposing portions of adjacent containers 10 engage in uneven engagement (FIG. 7(B)). Specifically, the engaging protrusion 31 of the other container 10 is received and fitted inside the surrounding protrusion 32 of one container 10 . Thereby, the containers 10 can be prevented from shifting in the direction perpendicular to the thickness direction. In addition, as shown in FIG. 1, in the container 10, the shape and arrangement of the diagonal positioning engagement parts 30 are the same, so whether the front or back of the container 10 is facing the adjacent container 10, Also, in adjacent containers 10, the engaging protrusion 31 of one container 10 engages with the surrounding protrusion 32 of the other container 10. Furthermore, in this embodiment, as described above, the amount of protrusion of the engaging protrusion 31 and the enclosing protrusion 32 from the corner 15 is approximately the same, so that the front or back surface of the container 10 is It becomes possible to easily place the container 10 in the state where the container 10 is placed. Furthermore, since the positioning engagement portions 30 are provided near each corner, the container 10 can be placed stably.

In the container 10 of this embodiment, as described above, the container 10 has a substantially rectangular plate shape, and a flat storage area R in which the cold storage liquid 11 is stored is provided inside the container 10. The accommodation area R is provided with a first accommodation part 20A that has a plate shape with a first thickness and occupies 40 to 80% of the total planar area of the accommodation area R. The portion having the first thickness or more occupies an area of 70% or more of the total area of the planar shape of the accommodation region R. Further, in the accommodation region R, a second accommodation portion 20 having a thickness of 1.30 to 3.05 times the first thickness is provided. Here, with conventional cold storage materials that are made by sealing cold storage liquid in a conventional cold storage material container that is flat and has flat front and back surfaces, when frozen and used, the cold storage liquid is smaller than the center part. There was a problem that the outer edges (particularly the corners) were easily melted and the cold storage performance was low. On the other hand, in the container 10 of this embodiment, the second accommodating part 20, which is thicker than the first accommodating part 20A, is unevenly distributed in the outer edge portion including the positions near the four corners of the container 10. As a result, the frozen cold storage liquid 11 is It is possible to suppress the portions near the outer edge of the container 10, especially the portions near the corners, from easily melting, and it is possible to improve the cold storage performance of the cold storage material 100. Moreover, as a result, it becomes possible to reduce the amount of cold storage liquid 11 while maintaining cold storage performance, and it also becomes possible to reduce the weight of cold storage material 100. If the thickness of the second accommodating portion 20 is less than 1.30 times the first thickness, it becomes difficult to improve the cold storage performance of the cold storage material 100 compared to the conventional one. Moreover, even if the thickness of the second housing part 20 exceeds 3.05 times the first thickness, it becomes difficult to improve the cold storage performance of the cold storage material 100 compared to the conventional one. In addition, since the first accommodating part 20A, which is thinner than the second accommodating part 20, is arranged in the center of the container 10 in the accommodating area R, when freezing the cold storage liquid 11 in the container 10, the container 10 It becomes possible to easily freeze the center of the

When the thickness of the second housing part 20 is 1.75 to 2.25 times the thickness of the first housing part 20A, it is possible to further improve the cold storage performance of the cold storage material 100. Further, when the thickness of the second housing part 20 is 1.80 to 2.25 times the thickness of the first housing part 20A, the cold storage performance of the cold storage material 100 can be further improved. In addition, when using a conventional container with the same volume of the storage area R, the area of the planar shape of the first storage section 20A is 40% or more of the total area of the planar shape of the storage area R. Compared to this, the cold storage liquid 11 near the center of the accommodation area R can be frozen more quickly. Furthermore, since the area of the planar shape of the first accommodating part 20A is 80% or less of the total area of the planar shape of the accommodating region R, the first accommodating part 20A is thinner than the second accommodating part 20. It is possible to prevent the cold storage performance of the cold storage material 100 from decreasing due to an increase in the proportion of the cold storage material 100. In addition, since the area of the planar shape of the second accommodating portion 20 is 20% or more of the total planar area of the accommodating region R, the frozen cold storage liquid 11 can be It is possible to suppress the tendency of melting. Further, by setting the ratio of the total volume of the second storage section 20 to the entire storage area R to be 35 to 70%, it is possible to further improve the cold storage performance of the cold storage material 100. Further, by setting the volume ratio of the first storage section 20A to the entire storage area R to 30 to 65%, it is possible to further improve the cold storage performance of the cold storage material 100.

In this embodiment, the first accommodating portion 20A extends from the center of the container 10 to the outer edge between the corners 15. Therefore, when containers 10 containing cold storage liquid 11 are stacked on top of each other in the thickness direction, a gap can be formed between the first accommodating portions 20A of adjacent containers 10. This makes it easier for cold air to pass through the gap when freezing the cold storage liquid 11, so that the cold storage material 100 can be frozen more quickly. Further, in the present embodiment, the difference in thickness between the first accommodating portion 20A and the thickest accommodating portion 20B is 9 to 23 mm. Therefore, when the containers 10 are stacked on each other in the thickness direction, it is possible to provide a gap S2 between the first accommodating portions 20A into which a finger can be inserted (see FIG. 7(A)). Thereby, it becomes possible to easily hold the container 10 with the first accommodating portion 20A disposed between the corner portions 15 in the longitudinal direction. In this embodiment, the thickness of the opposing wall 17 is substantially uniform, and the step difference between the first accommodating portion 20A and the thickest accommodating portion 20B on the outer surface of the opposing wall 17 is 9 to 23 mm. It has become.

In this embodiment, when the containers 10 are stacked on top of each other, the cold storage materials 100 can be easily positioned with respect to each other by the positioning engagement portions 30. Furthermore, the positioning engagement portion 30 is configured with protrusions provided on the front and back surfaces of the container 10, and is provided at each corner portion of the container 10 having the same thickness. It becomes possible to stabilize the placement of the container 10 compared to the case where the container 10 is configured with a protrusion and a recess. Furthermore, by making the protrusion amounts of the engagement protrusion 31 and the surrounding protrusion 32 substantially the same, it becomes possible to further stabilize the placement of the container 10.

In addition, in the container 10, the second storage section 20 may be located in a portion close to the outer edge, including each of the four corners of the container 10. In addition to the example shown in FIG. 1, other examples of such containers 10 include those having a storage area R shown in FIG. 10, those having a storage area R shown in FIG. 11(A) and FIG. 11(B), those having a storage area R shown in FIG. 11(C) and FIG. 11(D), those having a storage area R shown in FIG. 12(A) and FIG. 12(B), and those having a storage area R shown in FIG. 12(C) and FIG. 12(D).

Here, in this disclosure, the portion near the outer edge of the container 10 refers to a frame-shaped portion including the outer edge of the container 10 when the container 10 is viewed in the thickness direction (the portion outside the thick frame F shown by the two-dot chain line in FIG. 10(C)). Specifically, as shown in FIG. 10(C), the portion near the outer edge of the container 10 is composed of an area outside the intermediate position M1 that bisects the area between the center L1 and the outer edge of the container 10 in the longitudinal direction of the container 10, and an area outside the intermediate position M2 that bisects the area between the center L2 and the outer edge of the container 10 in the lateral direction of the container 10. In addition, each position near the four corners refers to each position in the four corner areas C that are outside the intermediate position M1 that bisects the area between the center L1 and the outer edge of the container 10 in the longitudinal direction of the container 10, and outside the intermediate position M2 that bisects the area between the center L2 and the outer edge of the container 10 in the lateral direction of the container 10.

[Confirmation experiment]
The cold storage performance of the cold storage material 100 in which the cold storage liquid 11 was accommodated in the cold storage material container 10 was confirmed for the cold storage material containers 10 of the following experimental examples.

1. Configuration of the cold storage material container and cold storage liquid in each experimental example <Cold storage material container>
The cold storage material container 10 (container 10) used was a substantially rectangular plate having a storage area R of 296 mm (length L) x 158 mm (width W) when viewed in the thickness direction.

<Experimental Examples 1 to 8, 10 to 13>
In these experimental examples, only two storage sections, the first storage section 20A and the second storage section 20 (thickest storage section 20B), are provided in the storage region R of the container 10 (i.e., the total volume of the first and second storage sections 20A, 20 is the same as the volume of the entire storage region R), and the second storage section 20 is provided only at the four corners, and the second storage section 20 is rectangular parallelepiped-shaped. Figures 8(A) to 8(C) show the size of the storage region R (i.e., the inner dimensions of the container 10). Specifically, the thickness Ta is the thickness of the first storage section 20A in each experimental example, the thickness Tb is the thickness of the second storage section 20 (thickest storage section 20B), and the length Lb and width Wb are the length (longitudinal length of the container 10) and width (shortitudinal length of the container 10) of the second storage section 20, respectively. Moreover, the area Sa and the area Sb are the area of the first storage section 20A and the area of the second storage section 20 (total area) when viewed from the thickness direction, respectively. The total area S is the total area of the storage region R when viewed from the thickness direction, and Sa/S and Sb/S respectively indicate the ratios of the areas Sa and Sb to the total area S. Moreover, the volume Va and the volume Vb are the volume of the first storage section 20A and the volume of the second storage section 20, respectively. The total volume V is the volume of the entire storage region R, and Va/V and Vb/V indicate the ratios of the volumes Va and Vb to the total volume V. The thickness of the container 10 (thickness of the resin) is 1.0 mm. Moreover, in FIG. 8(C), the unit of length is mm, the unit of area is ^mm2 , and the unit of volume is ^mm3 .

<Experiment example 9>
In Experimental Example 9, a plurality of accommodating portions with different thicknesses are not provided (only the first accommodating portion 20A is provided), and the accommodating region R has a uniform thickness.

Note that Experimental Examples 1 to 8 correspond to "Examples" and Experimental Examples 9 to 13 correspond to "Comparative Examples."

<Cooling fluid>
In each experimental example, the same type of cold storage liquid 11 was used. Details of the raw materials of the cold storage liquid 11 are as follows.

Solvent; Water 77 parts by weight Inorganic salt; Sodium chloride 23 parts by weight Thickener; Carboxymethyl cellulose 2 parts by weight

The volume of the cold storage liquid 11 contained in the storage area R of the container 10 is 90% of the total volume of the storage area R.

2. Evaluation method <Time to reach -8°C>
As shown in Fig. 9, the cold storage material 100, which is a container 10 containing cold storage liquid 11, was sealed in a test box 81 made of a heat insulating material installed at room temperature (23 ± 2 ° C), and the time until the atmospheric temperature in the test box 81 reached -8 ° C from -15 ° C was measured (the longer the time to reach -8 ° C, the higher the cold storage performance of the cold storage material 100). In detail, as shown in Fig. 9 (A) and Fig. 9 (B), the cold storage material 100 was arranged so that the thickness direction was vertical, and only the four corners 15 of the cold storage material 100 were supported from below by four heat insulating members 82, so that the lower surface (lowest surface) of the cold storage material 100 was raised by 120 mm from the placement surface on which the test box 81 was placed. At this time, the cold storage material 100 was in contact only with the heat insulating member 82, and was not in contact with the inner surface of the test box 81. Then, the temperatures were measured at points A and B at a height position 20 mm below the cold storage material 100 (a height position 100 mm above the placement surface of the test box 81). In detail, as shown in FIG. 9B, point A is a point that overlaps with the center of the test box 81 and the center of the cold storage material 100 when viewed from above at the above height position. Point B is a point that is shifted 80 mm toward one corner on the diagonal line of the test box 81 from point A at the above height position. The test box 81 is made of EPS (expanded polystyrene), has an inner dimension of 330 mm×165 mm×190 mm, and has a wall thickness of 25 mm.

Note that the cold storage material 100 is completely frozen at -35° C. for 24 hours or more before being placed in the test box 81. In addition, temperature sensors are installed in advance in the test box 81 at the positions of points A and B shown in FIG. Leave it in an atmosphere at room temperature (23±2°C) for 24 hours.

If the time to reach -8°C was 3.0 hours or more, it was rated as ◎, if it was between 2.7 hours and less than 3.0 hours, it was rated as 〇, and if it was less than 2.7 hours, it was rated as ×.

<Uniformity of surface temperature of cold storage material>
In the same manner as in the above-mentioned test for the time to reach -8°C, the cold storage material 100 completely frozen at -35°C for 24 hours or more was placed in the test box 81, and the time until the difference ΔT between the maximum and minimum values of the surface temperature of the cold storage material 100 in the test box 81 (the temperatures of the following points C to E) exceeded 2°C was used to evaluate the uniformity of the surface temperature of the cold storage material (i.e., the longer this time, the higher the uniformity of the surface temperature of the cold storage material).Then, when the time until ΔT>2°C (time to reach surface temperature difference>2°C) was 3.5 hours or more, it was evaluated as ◎, when it was 3 hours or more but less than 3.5 hours, it was evaluated as ◯, and when it was less than 3 hours, it was evaluated as ×. 9(C), the three points at which the surface temperature of the cold storage material 100 was measured are all located on the top surface of the container 10, and are point C which is the center of the top surface of the container 10, point E which is shifted 40 mm inward (toward point C) on a diagonal line from one corner of the container 10, and point D which is further shifted 60 mm inward (100 mm from the corner) on a diagonal line from point E. Also, before completely freezing the cold storage material 100 at -35°C for 24 hours or more, temperature sensors are attached in advance to the positions of points C, D, and E shown in FIG.

3. Evaluation Results As shown in FIG. 8(C), Tb/Ta, which is the ratio of the thickness Tb of the second accommodating part 20 to the thickness Ta of the first accommodating part 20A, is 1.30 to 3. In the containers 10 of Experimental Examples 1 to 8, which have a temperature of .05, both the evaluation of the time to reach -8 degrees and the evaluation of the uniformity of the surface temperature of the cold storage material were ○ or higher, indicating that the cold storage performance of the cold storage material 100 was improved. It was confirmed that this was achieved. Furthermore, in Experimental Examples 1, 2, 5, and 6 where Tb/Ta was 1.80 to 2.25, the time to reach -8°C was 3.2 hours or more, which was very good.

In addition, Tb/Ta is 1.30 to 3.05, and Va/V, which is the ratio of the volume Va of the first storage part 20A to the volume V of the entire storage area R, is 30 to 65%. In Experimental Examples 1 to 8 (that is, Vb/V is 35 to 70%), both the evaluation of the time to reach -8°C and the evaluation of the uniformity of the surface temperature of the cold storage agent were ○ or higher. became. Furthermore, in Experimental Examples 1 to 5 in which Va/V is 45 to 65% (that is, Vb/V is 35 to 55%), both of the above two evaluations are ◎, and the cold storage performance of the cold storage material 100 is It was confirmed that further improvements could be made.

As described above, Experimental Examples 1 to 8, which correspond to the "Examples" of the present disclosure, are different from Experimental Example 9, which has a conventional configuration in which the entire storage area R has a uniform thickness, and Experimental Examples 10 to 13. In comparison, it was confirmed that the cold storage performance of the cold storage material 100 could be improved.

[Other embodiments]
(1) In the above embodiment, the second accommodating part 20 may be arranged in a frame shape surrounding the first accommodating part 20A. Further, similarly to the short side housing portion 20C, a housing portion having a thickness between the first housing portion 20A and the thickest housing portion 20B is provided between the corner portions 15 on the long sides of the housing area R. You can leave it there.

(2) In the above embodiment, the second accommodating portion 20 may be provided only in the corner portion 15.

Note that although specific examples of the technology included in the scope of the claims are disclosed in this specification and drawings, the technology described in the claims is not limited to these specific examples, but includes various modifications and variations of the specific examples, as well as parts of the specific examples taken separately.

10: Cool storage material container 20A: First storage section 20B: Thickest storage section (second storage section)
20C Short side storage section (second storage section)

Claims (8)

A cold storage material container having a substantially rectangular plate shape and having a flat storage area for storing a cold storage medium inside,
The accommodation area is provided with a first accommodation part that has a plate shape with a first thickness and occupies 40 to 80% of the total area of the planar shape of the accommodation area,
A portion of the accommodation area having the first thickness or more occupies an area of 70% or more of the total area of the planar shape of the accommodation area,
The accommodation area is provided with a second accommodation part having a thickness of 1.30 to 3.05 times the first thickness and unevenly distributed near the outer edge including the four corners of the cold storage material container. Ori,
The first storage section extends from the center of the cold storage material container to the outer edge,
The second accommodating portion has a plate shape with a second thickness,
The cold storage material container, wherein the second thickness is 9 to 23 mm thicker than the first thickness. A cold storage material container having a substantially rectangular plate shape and having a flat storage area for storing a cold storage medium inside,
The accommodation area is provided with a first accommodation part that has a plate shape with a first thickness and occupies 40 to 80% of the total area of the planar shape of the accommodation area,
A portion of the accommodation area having the first thickness or more occupies an area of 70% or more of the total area of the planar shape of the accommodation area,
The storage area has a thickness that is 1.30 to 3.05 times the first thickness, and is unevenly distributed near the outer edge including the four corners of the cold storage material container , or has a thickness that is 1.30 to 3.05 times the first thickness, or A second accommodating portion is provided closer to the outer edge and unevenly distributed toward the outer edge ,
The storage area is provided with a rib that connects the bottoms of cup portions that protrude from a pair of opposing walls that face each other across the storage area in the thickness direction. A cold storage material container having a substantially rectangular plate shape and a flat storage area therein for storing a cold storage medium,
The storage area is provided with a first storage section having a plate shape of a first thickness and occupying an area of 40 to 80% of the total area of the planar shape of the storage area;
a portion of the storage area that is equal to or greater than the first thickness occupies an area of 70% or more of a total area of a planar shape of the storage area,
The storage region is provided with a second storage portion having a thickness 1.30 to 3.05 times the first thickness and located near an outer edge including four corners of the cold storage material container,
The cold storage material container has two opposing sides, each of which has a recess formed in the middle thereof, the recess being recessed inward in the direction of the opposite sides. A cold storage material container having a substantially rectangular plate shape and a flat storage area therein for storing a cold storage medium,
The storage area is provided with a first storage section having a plate shape of a first thickness and occupying an area of 40 to 80% of the total area of the planar shape of the storage area;
a portion of the storage area that is equal to or greater than the first thickness occupies an area of 70% or more of a total area of a planar shape of the storage area,
The storage region is provided with a second storage portion having a thickness 1.30 to 3.05 times the first thickness and located near an outer edge including four corners of the cold storage material container,
The storage region of the cooling material container has a substantially symmetrical shape on the front and back. A cold storage material container having a substantially rectangular plate shape and a flat storage area therein for storing a cold storage medium,
The storage area is provided with a first storage section having a plate shape of a first thickness and occupying an area of 40 to 80% of the total area of the planar shape of the storage area;
a portion of the storage area that is equal to or greater than the first thickness occupies an area of 70% or more of a total area of a planar shape of the storage area,
The storage area has a second storage section that is 1.30 to 3.05 times the thickness of the first thickness and is biased toward the outer edge including the four corners of the cold storage material container (excluding those that include a metal plate). A cold storage material container having a substantially rectangular plate shape and a flat storage area therein for storing a cold storage medium,
The storage area is provided with a first storage section having a plate shape of a first thickness and occupying an area of 40 to 80% of the total area of the planar shape of the storage area;
a portion of the storage area that is equal to or greater than the first thickness occupies an area of 70% or more of a total area of a planar shape of the storage area,
The storage region is provided with a second storage portion having a thickness 1.30 to 3.05 times the first thickness and located near an outer edge including four corners of the cold storage material container,
The second storage section is a cooling material container divided into four sections. A cold storage material container having a substantially rectangular plate shape and a flat storage area therein for storing a cold storage medium,
The storage area is provided with a first storage section having a plate shape of a first thickness and occupying an area of 40 to 80% of the total area of the planar shape of the storage area;
a portion of the storage area that is equal to or greater than the first thickness occupies an area of 70% or more of a total area of a planar shape of the storage area,
The storage region is provided with a second storage portion having a thickness 1.30 to 3.05 times the first thickness and biased toward an outer edge portion including the four corners of the cold storage material container, or biased toward the four corners and the outer edge of the cold storage material container ;
A cooling storage material container in which the volume ratio of the second storage portion to the volume of the storage region is within a range of 37.7 to 52.7%. A cold storage material in which the refrigerant storage medium is sealed in a cold storage material container according to any one of claims 1 to 7.

Images