Disposable freeze-thaw reveal capsule

Abstract

This invention provides a disposable frozen-to-thaw colorimetric capsule, comprising a convex hollow tube 1, a plastic sealing sheet 2, and a concave hollow tube 3. The convex hollow tube 1 is filled with a specially prepared aqueous solution and sealed with the plastic sealing sheet 2. One-quarter of the volume of dye or colorimetric agent is added to the concave hollow tube 3, which is then pressed together with the convex hollow tube 1, which is filled with the specially prepared aqueous solution and sealed with the plastic sealing sheet 2. This invention can alert consumers to potential thawing issues during the storage and transportation of frozen goods.

Description

Technical Field

[0001] This invention relates to the field of freezing temperature refreezing warning technology, specifically to a warning system for indicating whether frozen items have been refreezed and thawed during storage and transportation. Background Technology

[0002] People often worry about the proper condition of frozen items. In biotechnology research, samples typically need to be backed up, and freezing is the most common method to prevent sample distortion. However, when the number and variety of samples are large and the storage space is insufficient, samples inevitably become exposed to room temperature due to searching and transferring them. This can lead to refrigeration and data distortion, especially in third-party research service institutions. Improper transportation, storage, and experimentation can cause samples to freeze and thaw repeatedly, resulting in distorted experimental data and ultimately leading to liability disputes. It is difficult to pinpoint at which stage the problem occurred. The same applies to the food and pharmaceutical industries, especially frozen pharmaceutical products. Repeated refrigeration without the user's knowledge can have serious consequences. Summary of the Invention

[0003] To address these issues, the present invention provides disposable freeze-thaw colorimetric capsules.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a disposable freeze-thaw colorimetric capsule, which includes a convex hollow tube, a plastic sealing sheet, and a concave hollow tube; the outer side of the convex hollow tube opening is provided with an outer L-shaped chamfer; the plastic sealing sheet is a plastic heat-sealed sheet; the inner side of the concave hollow tube opening is provided with an inner L-shaped chamfer.

[0005] The present invention has the following advantages: This invention can alert you whether a frozen object has been thawed after freezing. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 These are structural diagrams of each component; The markings in the diagram are: 1. Convex hollow tube; 11. Outer L-shaped chamfer; 2. Plastic sealing sheet; 3. Concave hollow tube; 31. Inner L-shaped chamfer. Detailed Implementation

[0007] like Figure 1 As shown, a disposable freeze-thaw colorimetric capsule includes a convex hollow tube 1, a plastic sealing sheet 2, and a concave hollow tube 3.

[0008] Specifically, such as Figures 1-2As shown, the outer side of the opening of the convex hollow tube 1 is provided with an outer L-shaped chamfer 11; the plastic sealing sheet 2 closes the opening of the convex hollow tube 1; the inner side of the opening of the concave hollow tube 3 is provided with an inner L-shaped chamfer 31, and the inner L-shaped chamfer 31 is assembled with the outer L-shaped chamfer 11.

[0009] Specifically, during assembly, a special aqueous solution is filled into the convex hollow tube 1, then a plastic seal 2 is sealed on it. Next, 1 / 4 volume of dye or color developer is added into the concave hollow tube 3. Finally, the convex hollow tube 1 with the plastic seal 2 sealed on it is inverted and pressed together with the concave hollow tube 3 to complete the assembly of the one-time freeze-thaw color development capsule.

[0010] During operation, a disposable freeze-thaw colorimetric capsule is placed inside the packaging of a frozen item. As the item freezes, the aqueous solution in the convex hollow tube 1 expands in volume, causing the plastic seal 2 to rupture and connect with the concave hollow tube 3. At this point, the liquids in both tubes are solid due to freezing and do not mix. When the item thaws, the liquid in the disposable freeze-thaw colorimetric capsule also thaws, causing the aqueous solution in the convex hollow tube 1 to mix with the dye or colorimetric agent in the concave hollow tube 3, resulting in a color that cannot be reversed. This serves as a warning that the frozen item has been thawed.

[0011] In particular, special aqueous solutions with different freezing points can be prepared according to actual requirements, and disposable freeze-thaw colorimetric capsules with slender or flat shapes can be designed to enhance colorimetric sensitivity.

[0012] In conclusion, although the present invention has been described in detail with reference to the foregoing embodiments, it is not intended to limit the present invention. Those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Therefore, any modifications, equivalent substitutions, or improvements made to the present invention should be included within the scope of protection of the present invention.

Claims

1. A disposable freeze-thaw colorimetric capsule, comprising a convex hollow tube (1), a plastic sealing sheet (2), and a concave hollow tube (3); the convex hollow tube (1) has an outer L-shaped chamfer (11) on the outside of its opening, and is filled with a special aqueous solution; the plastic sealing sheet (2) is a plastic heat-sealing sheet, which seals the convex hollow tube (1); the concave hollow tube (3) has an inner L-shaped chamfer (31) on the inside of its opening, and is filled with 1 / 4 volume of dye or colorimetric agent; the convex hollow tube (1) sealed with the plastic sealing sheet (2) and the concave hollow tube (3) are pressed together.

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