Self-heating heat preservation packaging box

Abstract

The utility model provides a self-heating heat preservation packaging box which comprises an outer box and an inner box, and the outer box is provided with a turning edge protruding outwards. The inner box is arranged in the outer box, and the upper edge of the inner box is lapped on the turned edge; a heating cavity is formed between the inner box and the outer box; a heat preservation and insulation layer is laid outside the outer box. The heating bag has the advantages that less heat is leaked through the outer box, more generated heat is transmitted to the inner box, heat loss is reduced, and the heating efficiency of the heating bag is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of packing box, especially a kind of self-heating heat preservation packing box. BACKGROUND

[0002] With the acceleration of people's life rhythm, the current market of self-heating food is more and more, self-heating food refers to not rely on electricity and fire heating, and using self-heating package to heat food pre-packaged food.

[0003] In the related art, the heat generated by the heating package during the heating process of the food material is easy to make the temperature of the outer box too high, which causes the outer box to be too hot to touch and even cannot be placed on the glass table top, and the high temperature of the outer box makes the heat of the heating package of the packing box not fully used. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a self-heating heat preservation packing box to improve the heating efficiency.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows: a self-heating heat preservation packing box, comprising: an outer box, the outer box has a turned-up edge protruding outward;

[0006] An inner box is arranged in the outer box, and the upper edge of the inner box is lapped on the turned-up edge; a heating cavity is formed between the inner box and the outer box;

[0007] The outer side of the outer box is provided with a heat preservation and insulation layer.

[0008] Further, the heat preservation and insulation layer comprises a foam layer formed on the outer box, and a tin film layer attached to the foam layer.

[0009] Further, it further comprises a top cover buckled on the outer box, and the top cover is hollow inside to form a heat insulation cavity.

[0010] Further, a pressure relief hole is formed in the lower cover body of the top cover, and the pressure relief hole is communicated with the heat insulation cavity; an easy-to-tear notch is formed in the upper cover body of the top cover to form an easy-to-tear piece, and the easy-to-tear piece corresponds to the pressure relief hole; and a heat insulation piece is arranged on the easy-to-tear piece and can be blocked in the pressure relief hole.

[0011] Further, a lifting ear is fixedly connected to the edge of the easy-to-tear piece.

[0012] Further, the heat insulation piece is made of tin paper.

[0013] Further, the outer box is protruded outward to form a reinforcing rib, and the reinforcing rib is distributed on the bottom and the circumference of the outer box.

[0014] Compared with the prior art, the self-heating heat preservation packaging box has the following advantages:

[0015] The self-heating heat preservation packaging box has the following advantages:

[0016] The foam layer has a low heat transfer coefficient, thereby reducing heat dissipation of the heat preservation and heat insulation layer, improving the heat preservation of the heat preservation and heat insulation layer, and simultaneously reducing the weight of the foam layer material, so that the heat preservation box is more portable.

[0017] Meanwhile, by arranging the top cover with the heat insulation cavity, the heat dissipation through the top cover is reduced, thereby helping to improve the heat preservation of the packaging box.

[0018] In addition, by arranging the pressure relief hole and the easy-to-tear piece, the steam pressure generated in the self-heating heat preservation packaging box due to heating is discharged through the pressure relief hole, thereby helping to avoid the situation of the user being scalded due to the steam in the packaging box and carelessness when opening the packaging box. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated herein for reference. The illustrative embodiments of the present application and their description serve to explain the application and do not limit the application. In the drawings:

[0020] Figure 1 The overall structure of the top cover is shown in the figure.

[0021] Figure 2 The exploded view of the heat preservation and heat insulation layer and the outer box is shown in the figure.

[0022] Figure 3 The partial part view of the inner box in the outer box is shown in the figure.

[0023] Figure 4 The part view of the inner box is shown in the figure.

[0024] Figure 5 The cross-sectional view of the heating cavity is shown in the figure.

[0025] Figure 6 A schematic view of a top cover according to an embodiment of the present application is shown in the figure.

[0026] Figure 7 Another view of the top cover according to an embodiment of the present application is shown in the figure.

[0027] Figure 8 A sectional view of the top cover according to an embodiment of the present application is shown in the figure.

[0028] Explanation of reference signs:

[0029] 1, outer box; 101, turned edge;

[0030] 2, inner box; 201, upper edge;

[0031] 3, heat insulation layer; 301, foam layer; 302, tin film layer;

[0032] 4, top cover; 401, lower cover body; 4011, pressure relief hole; 402, upper cover body; 4021, easy-to-tear notch; 403, easy-to-tear piece; 404, heat insulation piece;

[0033] 5, pull ear;

[0034] 6, reinforcing rib;

[0035] a, heating cavity; b, heat insulation cavity; DETAILED DESCRIPTION

[0036] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0037] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", etc. appear, they are also only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] This embodiment relates to a self-heating insulated packaging box to improve heating efficiency.

[0041] In terms of overall structure, such as Figures 1 to 5 As shown, the self-heating and heat-insulating packaging box includes an outer box 1 and an inner box 2; the outer box 1 has an outwardly protruding flange 101; the inner box 2 is placed inside the outer box 1, and the upper edge 201 of the inner box 2 overlaps the flange 101; a heating cavity a is formed between the inner box 2 and the outer box 1; a heat-insulating layer 3 is applied to the outside of the outer box 1.

[0042] As described above, by applying a heat insulation layer 3 to the outside of the outer box 1, less heat generated by the heating pack in the heating chamber a leaks through the outer box 1, allowing more heat to be transferred to the inner box 2, thus reducing heat loss and improving the heating efficiency of the heating pack. Simultaneously, after heating the food in the packaging box, the heat insulation layer 3 also helps to reduce heat loss and keep the food warm. Furthermore, the reduced heat loss from the heat insulation layer 3 prevents the insulated box from becoming too hot to handle or burn the table.

[0043] Based on the above overall introduction, such as Figures 1 to 5 As shown, in this embodiment, after the upper edge 201 of the inner box 2 overlaps the flange 101 of the outer box 1, as an optional implementation, specifically, the upper edge 201 overlaps the flange 101 in the circumference, so that the heating chamber a forms a nearly sealed chamber, thereby reducing the flow of steam in the heating chamber a into the inner box 2 and improving food safety.

[0044] As an optional embodiment of the inner box 2, the inner box 2 is made of food-grade materials, such as polyethylene or polystyrene plastic materials, or glass, stainless steel or ceramic.

[0045] To improve the strength of outer box 1, such as Figure 1 and Figure 3As shown, in this embodiment, the outer box 1 protrudes outward to form reinforcing ribs 6, which are distributed on the bottom and circumference of the outer box 1. By providing reinforcing ribs 6, the outer box 1 maintains good stability after being heated, making the packaging box easy to carry and transfer.

[0046] To meet the thermal insulation and wear resistance requirements of the thermal insulation layer 3, such as Figure 2 As shown, the thermal insulation layer 3 includes a foam layer 301 formed on the outer box 1 and a tin film layer 302 applied to the foam layer 301.

[0047] As described above, the foam layer 301 has a low heat transfer coefficient, which reduces heat loss from the thermal insulation layer 3 and improves the thermal insulation performance of the thermal insulation layer 3. At the same time, the foam layer 301 has a low material weight, making the thermal insulation box more portable. Furthermore, by applying a tin film layer 302 to the foam layer 301, the tin film layer 302 has good wear resistance and also has good thermal insulation performance.

[0048] It is understandable that, such as Figure 1 As shown, the self-heating insulated packaging box also includes a top cover 4 that is snapped onto the outer box 1, and as... Figure 8 As shown, the top cover 4 is hollow inside to form a heat insulation cavity b.

[0049] By providing a top cover 4 with a heat insulation cavity b, the heat loss through the top cover 4 is reduced due to the low thermal conductivity of air, thereby improving the heat insulation of the packaging box. As an optional embodiment of the top cover 4, the top cover 4 may include an upper cover 402 and a lower cover 401, with the lower cover 401 fastened inside the upper cover 402, and the edge of the lower cover 401 being fixed integrally with the edge of the upper cover 402, thereby forming a heat insulation cavity b through the gap between the lower cover 401 and the upper cover 402.

[0050] To facilitate opening the top cover 4, such as Figures 6 to 8 As shown, the lower cover 401 of the top cover 4 is provided with a pressure relief hole 4011, which is connected to the heat insulation cavity b; the upper cover 402 of the top cover 4 is formed with easy-tear grooves 4021 to form an easy-tear piece 403, which corresponds to the pressure relief hole 4011; a heat insulation piece 404 is provided on the easy-tear piece 403 that can be sealed on the pressure relief hole 4011.

[0051] When in use, pull the easy-tear tab 403, and the easy-tear tab 403 will separate from the upper cover 402 at the easy-tear notch 4021. At the same time, the heat insulation sheet 404 connected to the easy-tear tab 403 will separate from the pressure relief hole 4011. At this time, the steam pressure generated by heating inside the self-heating and heat-insulating packaging box will be discharged through the pressure relief hole 4011, which helps to avoid the situation where the user is burned due to the presence of steam inside the packaging box and carelessness when opening the packaging box.

[0052] Based on the above setting, in order to separate the easy-to-tear piece 403 from the upper cover body 402, as shown in Figure 6 and Figure 8 As shown, the easy-to-tear piece 403 is fixed with a pulling ear 5, and the pulling ear 5 is fixed on the edge of the easy-to-tear piece 403. As an alternative embodiment of the pulling ear 5, specifically, the pulling ear 5 can be arranged in a ring structure, so that the user can put his finger into the pulling ear 5, which provides a better force point for tearing off the easy-to-tear piece 403.

[0053] As an alternative embodiment of the heat insulation piece 404, the heat insulation piece 404 is made of tin paper, so that the heat insulation piece 404 has a certain heat insulation capacity, and the steam generated by heating will not cause the heat insulation piece 404 to deform, and thus when the easy-to-tear piece 403 is completely connected to the upper cover body 402, the pressure relief hole 4011 is in a closed state. This is helpful for heating the food in the packaging box.

[0054] Similarly, as an embodiment of the top cover 4, specifically, at least the lower cover body 401 is made of food-grade material, and preferably the upper cover body 402 is also made of food-grade material. For example, plastic materials such as polyethylene or polystyrene can be selected as raw materials, or glass, stainless steel or ceramic can be selected.

[0055] The self-heating and heat-insulating packaging box described in the embodiments of the present application can reduce the leakage of heat generated by the heating bag in the heating cavity a through the outer box 1, and can make more heat generated to be transmitted to the inner box 2, thereby reducing heat loss and improving the heating efficiency of the heating bag. At the same time, after the food in the packaging box is heated, the heat-insulating layer 3 can also help to slow down the heat loss of the food and achieve heat preservation of the food. After the heat-insulating layer 3 slows down the heat loss, the heat-insulating box is not easy to burn the hand and the table top.

[0056] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A self-heating insulated packaging box, characterized in that, include: Outer box (1), the outer box (1) having an outwardly protruding flange (101); Inner box (2), the inner box (2) is placed inside the outer box (1), and the upper edge (201) of the inner box (2) overlaps the flange (101); a heating cavity (a) is formed between the inner box (2) and the outer box (1); a heat insulation layer (3) is provided on the outside of the outer box (1); And a top cover (4) fastened to the outer box (1), the top cover (4) being hollow inside to form a heat insulation cavity (b); The lower cover (401) of the top cover (4) is provided with a pressure relief hole (4011), which is connected to the heat insulation cavity (b); the upper cover (402) of the top cover (4) is formed with easy-tear marks (4021) to form an easy-tear sheet (403), which corresponds to the pressure relief hole (4011); the easy-tear sheet (403) is provided with a heat insulation sheet (404) that can be sealed on the pressure relief hole (4011).

2. The self-heating insulated packaging box according to claim 1, characterized in that: The thermal insulation layer (3) includes a foam layer (301) formed on the outer box (1) and a tin film layer (302) applied to the foam layer (301).

3. The self-heating insulated packaging box according to claim 1, characterized in that: A pull tab (5) is fixedly attached to the easy-tear sheet (403), and the pull tab (5) is fixedly attached to the edge of the easy-tear sheet (403).

4. The self-heating insulated packaging box according to claim 1, characterized in that: The heat insulation sheet (404) is made from tin foil.

5. The self-heating insulated packaging box according to claim 1, characterized in that: The outer box (1) protrudes outward to form reinforcing ribs (6), which are distributed on the bottom and circumference of the outer box (1).

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