Corrugated packaging box with heat preservation function

Abstract

This utility model discloses a corrugated packaging box with heat preservation function, including a box body. The cardboard wall of the box body is provided with a two-layer corrugated paper structure, including an outer layer and an inner layer. The inner layer uses honeycomb three-dimensional corrugated core paper to form regularly arranged hexagonal air cavities. A heat radiation reflective layer is provided between the outer layer and the inner layer. An insulation layer is bonded to the inner side of the inner layer. A detachable insulation box is provided on the side wall of the insulation layer. The insulation box is filled with phase change material. A concave box for placing ice packs and collecting accumulated liquid is provided at the bottom of the box body. This utility model effectively blocks heat conduction and enhances the pressure resistance of the box body by combining a double-layer corrugated paper structure with a honeycomb hexagonal air cavity design. The phase change material filled in the insulation layer and the detachable insulation box works synergistically. Through the heat absorption / release characteristics of the phase change material, the temperature stability inside the box is significantly extended.

Description

Technical Field

[0001] This utility model relates to the field of packaging box technology, specifically a corrugated packaging box with heat preservation function. Background Technology

[0002] Corrugated cardboard is die-cut, creasing, and stapling or gluing to create corrugated boxes. Corrugated boxes are one of the most widely used packaging products, consistently ranking first in usage among all packaging materials. This includes calcium-plastic corrugated boxes. For over half a century, corrugated boxes have gradually replaced wooden crates and other transport packaging containers due to their superior performance and easy processing, becoming the mainstay of transport packaging. Besides protecting goods and facilitating warehousing and transportation, they also beautify and promote products. Corrugated boxes are environmentally friendly products, benefiting both environmental protection and ease of loading and unloading.

[0003] Existing insulated packaging boxes mostly use a single insulation material, such as foam board, which can only delay heat transfer through the material's thermal conductivity and lacks the ability to dynamically adjust to drastic changes in ambient temperature. When the external temperature fluctuates significantly, the internal temperature is difficult to maintain, which may cause the goods to deteriorate due to abnormal temperature. At the same time, in traditional insulation structures, the combination of insulation material and corrugated cardboard is relatively simple, and the overall structure's compressive strength and sealing performance are insufficient. When subjected to compression or impact during transportation, the insulation layer structure is easily damaged, further reducing insulation performance. In addition, traditional packaging boxes often require additional cooling materials such as ice packs, but lack designs for collecting and treating condensate or melted liquids, which can easily lead to dampness inside the box, affecting not only the insulation effect but also potentially causing contamination of goods or damage to the packaging box. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing corrugated packaging boxes in terms of heat preservation performance, liquid accumulation control, and structural stability, and to provide a corrugated packaging box with heat preservation function.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a corrugated packaging box with heat preservation function, comprising a box body, wherein the cardboard wall of the box body is provided with a two-layer corrugated paper structure, including an outer layer and an inner layer, wherein the inner layer is made of honeycomb three-dimensional corrugated core paper to form regularly arranged hexagonal air cavities, wherein a heat radiation reflective layer is provided between the outer layer and the inner layer, wherein a heat preservation layer is bonded to the inner side of the inner layer, wherein a detachable heat preservation box is provided on the side wall of the heat preservation layer, wherein the heat preservation box is filled with a phase change material, and wherein a concave box for placing ice packs and collecting accumulated liquid is provided at the inner bottom of the box body.

[0006] Furthermore, the heat radiation reflective layer uses aluminum foil as the heat radiation reflective material, and the aluminum foil is bonded between the outer layer plate and the inner layer plate.

[0007] Furthermore, the insulation layer uses foam board material as the insulation material.

[0008] Furthermore, the insulation box is fitted into the insulation layer through a slot provided on the insulation layer, or it is glued to the side of the insulation layer by adhesive.

[0009] Furthermore, the concave box includes a box body with a side opening, an ice pack can be placed inside the box body, protrusions are provided on the four sides of the box body, a liquid accumulation groove is provided on one side of the protrusions, and a notch is provided in the middle of the top surface of the box body that communicates with the hollow cavity inside the box body.

[0010] Furthermore, the insulated box is a sealed plastic box, and the phase change material filled inside can be paraffin-based or stearic acid.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The double-layer corrugated paper structure (outer and inner layers) combined with the honeycomb hexagonal air cavity design effectively blocks heat conduction; the heat radiation reflective layer (aluminum foil) can reflect external heat radiation, further reducing heat penetration; the insulation layer (foam board) and the removable insulation box (filled with phase change material) work together to significantly extend the stability of the temperature inside the box through the heat absorption / release characteristics of the phase change material.

[0013] 2. The concave box design integrates ice pack placement and liquid collection functions. The raised part and liquid collection groove can prevent liquid from overflowing and avoid moisture inside the box from affecting the heat preservation effect.

[0014] 3. Corrugated paper and foam board materials are lightweight and recyclable, the aluminum foil heat reflective layer is thin and low-cost, and the overall structure combines functionality and environmental protection. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is an exploded view of the outer layer, the inner layer, the heat radiation reflective layer, and the insulation layer in this utility model;

[0017] Figure 3 This is a schematic diagram of the concave box in this utility model.

[0018] In the diagram: 1-box body, 2-outer layer plate, 3-inner layer plate, 4-heat radiation reflective layer, 5-insulation layer, 6-insulation box, 7-concave box, 71-protrusion, 72-liquid trough, 73-notch. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Combination Figures 1 to 3 The corrugated packaging box with heat preservation function shown includes a box body 1. The cardboard wall of the box body 1 is provided with a two-layer corrugated paper structure, including an outer layer 2 and an inner layer 3. The inner layer 3 is made of honeycomb three-dimensional corrugated core paper, forming regularly arranged hexagonal air cavities. The hexagonal structure has strong stability, making the box less prone to deformation under pressure, ensuring the heat insulation effect. At the same time, the three-dimensional structure increases the overall compressive strength of the box, avoiding the decrease in heat preservation performance due to compression during transportation. A heat radiation reflective layer 4 is provided between the outer layer 2 and the inner layer 3. A heat preservation layer 5 is bonded to the inner side of the inner layer 3. A detachable heat preservation box 6 is provided on the side wall of the heat preservation layer 5. The heat preservation box 6 is filled with phase change material. A concave box 7 for placing ice packs and collecting accumulated liquid is provided at the inner bottom of the box body 1.

[0022] Among them, the heat radiation reflective layer 4 uses aluminum foil as the heat radiation reflective material, and the aluminum foil is bonded between the outer layer 2 and the inner layer 3; the heat radiation reflective layer 4 is located between two layers of corrugated paper, and blocks the influence of external high temperature or low temperature environment on the temperature inside the box by reflecting infrared radiation; the insulation layer 5 uses foam board material as the insulation material to reduce internal temperature loss.

[0023] The insulated box 6 is secured to the insulation layer 5 via a slot on the insulation layer 5, or it is glued to the side of the insulation layer 5. The insulated box 6 is a sealed plastic box, filled with a phase change material made of paraffin or stearic acid. When the external temperature changes, the phase change material undergoes a solid-liquid or liquid-solid transition, absorbing or releasing heat. For example, when transporting fresh food, the internal temperature rises, and the phase change material absorbs heat and changes from a solid to a liquid state; when the temperature drops, it changes back from a liquid to a solid state, releasing heat to maintain a stable internal temperature. Furthermore, the insulated box 6 has a fill rate of 80%-90% of its cavity volume, leaving 10%-20% space to accommodate volume expansion during phase change (the liquid volume of paraffin-based material increases by approximately 10%-15%). The insulated box 6 can be reliably sealed using common plastics such as PE, PP, and PET.

[0024] The concave box 7 includes a box body with side openings. Protrusions 71 are provided on all four sides of the box body, and a liquid collection groove 72 is formed on one side of each protrusion 71. A notch 73, communicating with the internal hollow cavity of the box body, is formed in the center of the top surface of the box body. When storing fresh produce or other items requiring refrigeration, ice packs can be placed inside the box to lower the internal temperature through the release of cold air. Liquid generated from the melting or condensation of refrigerated items can flow into the box body through the notch 73 or into the liquid collection groove 72. The protrusions 71 reduce the splashing of liquid during transport. Furthermore, since the insulation layer 5 is made of foam board material, it further prevents the corrugated cardboard box from getting wet from splashed liquid.

[0025] Working Principle: The outer and inner layers utilize a double-layer corrugated paper structure. The honeycomb-shaped hexagonal air cavities in the inner layer form a static air layer, significantly reducing heat conduction efficiency. An aluminum foil heat radiation reflective layer is located between the two corrugated paper layers, reflecting infrared radiation to block the influence of external high or low temperatures on the internal temperature. The insulation box is filled with phase change materials such as paraffin-based or stearic acid. When the ambient temperature changes, the material absorbs or releases latent heat through a solid-liquid phase change, maintaining a constant internal temperature. The detachable design of the insulation box allows for easy replacement of materials with different phase change points according to transportation needs, adapting to various scenarios from freezing to room temperature. An ice pack is built into the concave box to further reduce the internal temperature through cold release. A foam insulation layer is attached to the inner side of the inner layer, forming a multi-layer insulation barrier together with the phase change material, delaying heat exchange. All components are fixed by adhesive or slots, ensuring the stability and sealing of the overall structure while also facilitating disassembly and maintenance.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A corrugated packaging box with heat preservation function, comprising a box body (1), characterized in that: The carton wall of the box (1) is provided with a two-layer corrugated paper structure, including an outer layer (2) and an inner layer (3). The inner layer (3) is made of honeycomb three-dimensional corrugated core paper to form a regularly arranged hexagonal air cavity. A heat radiation reflective layer (4) is provided between the outer layer (2) and the inner layer (3). An insulation layer (5) is bonded to the inner side of the inner layer (3). A detachable insulation box (6) is provided on the side wall of the insulation layer (5). The insulation box (6) is filled with phase change material. A concave box (7) for placing ice packs and collecting accumulated liquid is provided at the bottom of the box (1).

2. The corrugated packaging box with heat preservation function according to claim 1, characterized in that: The heat radiation reflective layer (4) uses aluminum foil as the heat radiation reflective material, and the aluminum foil is bonded between the outer layer plate (2) and the inner layer plate (3).

3. The corrugated packaging box with heat preservation function according to claim 2, characterized in that: The insulation material used in the insulation layer (5) is foam board.

4. The corrugated packaging box with heat preservation function according to claim 3, characterized in that: The heat preservation box (6) is installed in the heat preservation layer (5) through a slot opened on the heat preservation layer (5), or it is glued to the side of the heat preservation layer (5) by adhesive.

5. The corrugated packaging box with heat preservation function according to claim 4, characterized in that: The concave box (7) includes a box body with a side opening, and a protrusion (71) is provided on the four sides of the box body. A liquid accumulation groove (72) is provided on one side of the protrusion (71), and a notch (73) communicating with the hollow cavity inside the box body is provided in the middle of the top surface of the box body.

6. The corrugated packaging box with heat preservation function according to claim 5, characterized in that: The insulated box (6) is a sealed plastic box, and the phase change material inside is paraffin-based or stearic acid.

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