Portable ice pack

Abstract

This invention provides a portable coolant that is easy to carry and has a shape suitable for carrying multiple units by stacking them flat in a compact, vacuum-insulated cylindrical container. [Solution] The cooling agent is enclosed in a packaging bag made by joining two flexible packaging films, and the packaging bag has an inner joint 3 for holding the cooling agent in a substantially disc shape for freezing, and an outer peripheral end 2 located on its outer circumference, and the first outer diameter, which is the diameter of the frozen cooling agent, is formed to be smaller than the opening diameter of the cylindrical container to be stored, and the second outer diameter, which is the diameter of the outer peripheral end, is formed to be smaller than the inner circumference diameter of the cylindrical container and larger than the first outer diameter, and furthermore, the cooling agent has enough weight to be stacked and held flat along the bottom surface of the container or the top surface of other cooling agents that have been placed in advance by its own weight when placed in the container.

Description

Technical Field

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[0003]

[0001] This invention relates to a coolant that can maintain a large number of coolants in a frozen state for a long time and is easily portable.

Background Art

[0002] Conventionally, when carrying a large number of coolants in a frozen state, it was common to carry them in a container such as a cooler box. However, for example, when considering a usage situation where it is carried in a bag and the coolant is taken out to cool down when needed under the scorching sun in midsummer, it is preferable to carry it in a more easily portable container. In that case, a portable method using a more compact cooler bag or the like can be considered. However, the heat insulation effect of a cooler bag or the like has a limit, and it was difficult to maintain the frozen state for a long time.

[0003] As a means to solve this problem, for example, a method using a small portable cooling container with an improved duration of the cooling effect disclosed in Patent Document 1 can be mentioned.

Prior Art Documents

Patent Document

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional example shown in Patent Document 1, the opening of the container body is large, and depending on the material of the container body, the heat insulation effect is limited, and there is a limit to maintaining the frozen state for a long time.

[0005] On the other hand, as a method of maintaining the frozen state for a long time, it is conceivable to carry a coolant in a commercially available compact cylindrical container with a vacuum insulation structure. However, as a problem with the method using this container, when the shape of the coolant is square, a large number of coolants cannot be put into the container by fully utilizing the volume of the container, and at present, no coolant suitable for being put into the container can be found.

[0006] Therefore, in order to solve the problems described in paragraph 0005, the present invention provides a cooling pack that can be carried in large quantities by making full use of the volume of a compact cylindrical container with a vacuum insulation structure. [Means for solving the problem]

[0007] The first solution to the problem is a portable coolant (first invention) characterized in that the coolant is enclosed in a packaging bag made by joining two flexible packaging films, the packaging bag having an inner joint for holding the coolant in a substantially disc shape for freezing and an outer peripheral end located on its outer circumference, the first outer diameter which is the diameter of the frozen coolant is formed to be smaller than the opening diameter of the cylindrical container to be stored, the second outer diameter which is the diameter of the outer peripheral end is formed to be smaller than the inner circumference diameter of the cylindrical container and larger than the first outer diameter, and furthermore the coolant has enough weight to be stacked and held flat along the bottom surface of the container or the top surface of other coolants that have been placed in advance by its own weight when placed in the container. [Effects of the Invention]

[0008] The first advantage of the cooling pack according to the first invention is that it is intended to be carried in a commercially available, compact, cylindrical container with a vacuum-insulated structure, and since such containers are widely available, it is easy to obtain.

[0009] A second effect of the first invention is that the coolant freezes the cold storage material in a roughly disc shape, and by making the diameter of the frozen cold storage material slightly smaller than the opening diameter of a cylindrical container, it can be placed into the container, and a large number of coolants can be placed in the container by utilizing the volume of the container. The dimensions of the opening diameter of cylindrical containers vary depending on the type, but broadly speaking, large containers have a diameter of about 45 mm, and medium-sized containers have a diameter of about 35 mm. Therefore, for the first invention, the diameter of the cold storage material can be considered to be about 40 mm for large containers and about 30 mm for medium-sized containers.

[0010] A third effect of the first invention is that, by making the diameter of the outer end smaller than the inner diameter of the cylindrical container, the coolant can be stacked and held flat along the bottom surface of the container or the top surface of other coolants that have been placed in advance, without getting stuck in the middle of the container. Here, if the diagonal length of the outer end is larger than the diameter of the cylindrical container, it will get stuck in the middle of the container due to contact friction with the inner surface of the cylindrical container, and will not be stacked and held, making it impossible to put in a large number of coolants while making full use of the container's volume.

[0011] A fourth effect is that by making the outer diameter of the end of the coolant according to the first invention slightly smaller than the inner diameter of the cylindrical container, when the coolant is placed inside, the outer circumference acts as a guide, and the coolant is regularly stacked and held inside the container. The inner diameter of the cylindrical container is generally about 10 mm to 15 mm larger than the opening diameter. Therefore, the outer diameter of the end of the coolant according to the first invention can be considered to be about 55 mm for large containers and about 40 mm for medium containers. However, if the outer circumference diameter is almost the same as the diameter of the frozen coolant, the outer circumference will not act as a guide, the coolant will not be regularly stacked and held, and the coolant will bump against the inside of the container when carried, producing unnecessary noise.

[0012] A fifth effect is that, when the coolant according to the first invention is placed into a cylindrical container, it has enough weight to fall by its own gravity, so that it does not get stuck in the middle of the container and falls onto the bottom of the container or onto other coolants that have been placed in earlier. Also, when removing the coolant, it can be easily removed by utilizing its own gravity. The weight of the coolant according to the first invention is thought to be about 30 grams for large containers and about 20 grams for medium containers. In this case, the coolant will have a thicker shape than a typical coolant. [Brief explanation of the drawing]

[0013] [Figure 1] A perspective view of the portable cooling pack according to claim 1 is shown. [Figure 2]Shows a cross-sectional view of the portable cold storage agent according to claim 1. [Figure 3] Shows a cross-sectional view of the cylindrical container and the portable cold storage agent according to claim 1. [Figure 4] Shows a cross-sectional view of the cylindrical container according to claim 1 and a top view of the portable cold storage agent.

Mode for Carrying Out the Invention

[0014] Figure 1 is a perspective view showing an example of the portable cold storage agent according to claim 1. It is composed of a cold storage agent (1) frozen in a substantially disk shape and a circular outer peripheral end portion (2) formed by joining two packaging films around it.

[0015] Figure 2 is a cross-sectional view showing an example of the portable cold storage agent according to claim 1. The portable cold storage agent is composed of a cold storage material (1), an inner joining portion (3) for holding and freezing the cold storage material (1) in a substantially disk shape, and an outer peripheral end portion (2) located on its outer periphery.

[0016] Figure 3 shows an example of the portable cold storage agent according to claim 1 and is a cross-sectional view of the portable cold storage agent (4) and the cylindrical container (5). When the portable cold storage agent (4) is put into the cylindrical container (5), it is stacked and held in the cylindrical container (5) due to the guiding effect of the outer peripheral end portion (2) and the effect of its own weight.

[0017] Figure 4 shows an example of the portable cold storage agent according to claim 1 and is a top view of the portable cold storage agent and a cross-sectional view of the cylindrical container. The first diameter (d1), which is the diameter of the frozen cold storage material (1), is formed smaller than the opening diameter (d) of the cylindrical container, and the second diameter (d2), which is the diameter of the outer peripheral end portion (2), is formed smaller than the inner diameter (D) of the cylindrical container.

Explanation of Reference Numerals

[0018] 1 Cold storage material 2 Outer peripheral end portion 3 Inner joining portion 4. Portable ice pack 5. Cylindrical container d. Diameter of the opening of the cylindrical container d1 First diameter d2 second diameter D. Inner diameter of cylindrical container

Claims

[Claim 1] The cooling agent is enclosed in a packaging bag made by joining two flexible packaging films, The packaging bag has an inner joint for holding the cold storage material in a substantially disc shape for freezing, and an outer peripheral end located on its outer circumference. The first outer diameter, which is the diameter of the frozen cold storage material, is formed to be smaller than the opening diameter of the cylindrical container to be stored. A portable coolant, characterized in that the second outer diameter, which is the diameter of the outer peripheral end, is smaller than the inner circumference of the cylindrical container and larger than the first outer diameter, and further, the coolant has sufficient weight to be stacked and held flat along the bottom surface of the container or the top surface of other coolants that have been placed in advance by its own weight when placed in the container.

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