Heat preservation lunch box with PE aluminum foil composite layer

Abstract

The utility model belongs to the technical field of heat preservation lunch boxes, and discloses a heat preservation lunch box with a PE aluminum foil composite layer, the heat preservation lunch box comprises a box body and a box cover buckled and matched with an opening of the box body, the inner wall of the box body is provided with a heat preservation composite layer, or the inner wall of the box body and the inner wall of the box cover are both provided with heat preservation composite layers. The thermal insulation composite layer is arranged in the thermal insulation meal box, so that the box cover and the box body jointly form a closed structure with good thermal insulation performance, the thermal insulation time of food is prolonged, and the experience feeling of customers during eating in winter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat-insulating lunch boxes, in particular to a heat-insulating lunch box with a PE aluminum foil composite layer. Background Art

[0002] The takeaway insulated lunch box is a special lunch box that can keep the temperature of food for a certain period of time and is suitable for takeaway use. The design feature of the takeaway insulated lunch box is that it has a heat preservation function, which is mainly achieved by adding a heat preservation shell to the ordinary lunch box.

[0003] To solve the problem of takeout getting cold easily due to low temperatures in winter, merchants usually put an insulation cover on the outside of the takeout box and then put it in a plastic bag. Takeout deliverymen usually deliver the takeout in batches through insulated boxes. Although the above operation reduces the cooling speed of takeout food to a certain extent, the degree of insulation is limited.

[0004] At present, the prior art also has attempts to improve the lunch box structure to achieve food insulation, but due to unreasonable design of the lunch box structure, the heat convection between the food in the lunch box and the outside is fast, and the heat in the lunch box cannot be well preserved. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a heat-insulating lunch box with a PE aluminum foil composite layer, which can form a closed structure with good heat-insulating performance, thereby better keeping the food in the lunch box warm, and the lunch box has a simple structure and is easy to produce.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions: an insulated lunch box with a PE aluminum foil composite layer, comprising a box body and a box cover that is snap-fitted with an opening of the box body, wherein the inner wall of the box body is provided with a thermal insulation composite layer, or the inner wall of the box body and the inner wall of the box cover are both provided with a thermal insulation composite layer; an annular convex edge is integrally formed at the bottom of the box body near its edge, and an annular groove that is coaxial with the annular convex edge and snap-fitted is provided at the top of the box cover; an annular extension portion extending outward is integrally formed at the top of the box body near its edge, and a An annular inner edge that is snap-fitted with the annular extension portion, and the annular inner edge extends toward a side close to the axis of the box cover; an annular anti-slip groove is provided at the bottom of the box cover near the outer wall of the box cover; the thermal insulation composite layer inside the box body extends to the top of the box body, and when the box cover is in a closed state, the thermal insulation composite layer at the bottom of the box cover fits tightly with the thermal insulation composite layer at the top of the box body; an expanding groove is provided at the inner wall of the box body near its top, and a yield groove that cooperates with the top edge of the box body is provided between the thermal insulation composite layer on the box cover and the inner wall of the box cover, and the bottom of the thermal insulation composite layer on the box cover fits tightly with the top of the thermal insulation composite layer at the expanding groove.

[0007] By adopting the above technical solution, through the setting of the heat preservation composite layer, the lid and the box body jointly form a sealed structure with good heat preservation performance, extending the heat preservation time of food and improving the dining experience of customers in winter. After the merchant packs the takeout, multiple heat preservation lunch boxes are stacked together. The annular convex edge and the annular groove are engaged and cooperate with each other, reducing the probability that the top heat preservation lunch box will fall due to external force. In addition, during the delivery process of the deliveryman, the annular convex edge and the annular groove cooperate, which is beneficial to enhancing the stability of the stacked heat preservation lunch boxes and reducing the probability of the takeout tipping over. After the lid is closed, the annular extension part and the annular inner edge are engaged and cooperate with each other, ensuring the stability during the lid closing process. The setting of the annular anti-slip groove facilitates the customer to place their fingers in the annular anti-slip groove and open the lid when opening the lid, reducing the probability of slipping. It is beneficial to ensure the heat preservation effect of the food by the heat preservation lunch box after the lid is closed.

[0008] Further, the heat preservation composite layer includes a PE layer that is attached to and fixed to the inner wall of the box body or the inner wall of the lid, and an aluminum foil layer that is compounded on the surface of the PE layer.

[0009] By adopting the above technical solution, the PE layer has a certain function of reflecting and blocking heat radiation; the aluminum foil has excellent heat insulation performance, with the characteristics of high reflectivity and low emissivity; the PE layer and the aluminum foil layer cooperate with each other to prevent heat conduction, achieving a good heat insulation effect and enhancing the food heat preservation performance of the heat preservation lunch box.

[0010] Further, the thickness of the PE layer is 0.06mm - 0.07mm, and the thickness of the aluminum foil layer is 0.05 - 0.2mm.

[0011] By adopting the above technical solution, while ensuring the heat preservation performance of the heat preservation lunch box, the thickness of the heat preservation composite layer is reduced.

[0012] Further, the heat preservation composite layer further includes a honeycomb layer provided between the aluminum foil layer and the PE layer.

[0013] By adopting the above technical solution, the honeycomb-like porous structure of the honeycomb layer realizes an efficient heat preservation effect by reducing the apparent thermal conductivity of the heat preservation material, restricting the scale of air flow, and using multiple layers of heat shield plates to hinder radiative heat transfer. The setting of the honeycomb layer enhances the heat preservation effect of the heat preservation composite layer and further delays the cooling speed of the meal.

[0014] Further, the thickness of the honeycomb layer is 0.1mm - 0.15mm.

[0015] In summary, the present utility model has the following beneficial effects:

[0016] 1. In this application, the setting of the thermal insulation composite layer enables the lid and the box body to jointly form a sealed structure with good thermal insulation performance, extending the thermal insulation time of food and improving the dining experience of customers in winter.

[0017] 2. In this application, the PE layer has a certain role in reflecting and blocking heat radiation; the aluminum foil has excellent heat insulation performance, with the characteristics of high reflectivity and low emissivity; the combined action of the PE layer and the aluminum foil layer prevents heat conduction, achieving a good heat insulation effect and enhancing the food thermal insulation performance of the thermal insulation lunch box.

[0018] 3. In this application, the honeycomb-like porous structure of the honeycomb layer realizes an efficient heat insulation effect by reducing the apparent thermal conductivity of the thermal insulation material, restricting the scale of air flow, and using multiple layers of heat shields to hinder radiation heat transfer. The setting of the honeycomb layer enhances the heat insulation effect of the thermal insulation composite layer and further delays the cooling speed of the meal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present utility model;

[0020] Figure 2 is Figure 1 the structural schematic diagram from another perspective in;

[0021] Figure 3 is Figure 1 the plan view of;

[0022] Figure 4 is Figure 3 the enlarged schematic diagram at A in;

[0023] Figure 5 is the exploded structural schematic diagram of Embodiment 1 of the present utility model;

[0024] Figure 6 is the structural schematic diagram after two thermal insulation lunch boxes of the present utility model are stacked;

[0025] Figure 7 is the plan view of Embodiment 2 of the present utility model;

[0026] Figure 8 is the plan view of Embodiment 3 of the present utility model;

[0027] Figure 9 is Figure 8 the enlarged schematic diagram at B in.

[0028] In the figure: 1. Box body; 11. Annular convex edge; 12. Annular extension; 13. Flaring groove; 2. Box cover; 21. Annular groove; 22. Annular inner edge; 23. Annular anti-slip groove; 24. Relief groove; 3. Thermal insulation composite layer; 31. PE layer; 32. Aluminum foil layer; 33. Honeycomb layer. Detailed implementation mode

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] Embodiment 1

[0031] As Figures 1-6 shown, an embodiment of the present application discloses a thermal insulation lunch box with a PE-aluminum foil composite layer, including a box body 1 and a box cover 2 that is buckled and matched with the opening of the box body 1. A thermal insulation composite layer 3 is provided on the inner wall of the box body 1 and the inner wall of the box cover 2.

[0032] The setting of the thermal insulation composite layer 3 enables the box cover 2 and the box body 1 to jointly form a closed structure with good thermal insulation performance, extending the thermal insulation time of food and improving the experience of customers when eating in winter.

[0033] The thermal insulation composite layer 3 includes a PE layer 31 that is attached and fixed to the inner wall of the box body 1 or the inner wall of the box cover 2 and an aluminum foil layer 32 that is compounded on the surface of the PE layer 31. The PE layer 31 has a certain role in reflecting and blocking heat radiation; the aluminum foil has excellent heat insulation performance and the characteristics of high reflectivity and low emissivity; the cooperation of the PE layer 31 and the aluminum foil layer 32 prevents heat conduction, plays a good heat insulation effect, and enhances the food thermal insulation performance of the thermal insulation lunch box.

[0034] The thermal insulation composite layer 3 further includes a honeycomb layer 33 provided between the aluminum foil layer 32 and the PE layer 31. The thickness of the PE layer 31 is 0.06 mm - 0.07 mm, the thickness of the aluminum foil layer 32 is 0.05 - 0.2 mm, and the thickness of the honeycomb layer 33 is 0.1 mm - 0.15 mm. The honeycomb-like porous structure of the honeycomb layer 33 realizes an efficient thermal insulation effect by reducing the apparent thermal conductivity of the thermal insulation material, restricting the scale of air flow, and using multiple layers of heat shield plates to hinder radiative heat transfer. The setting of the honeycomb layer 33 enhances the thermal insulation effect of the thermal insulation composite layer 3 and further delays the cooling speed of the meal.

[0035] An annular convex edge 11 is integrally formed at a position near the edge of the bottom of the box body 1, and an annular groove 21 coaxial with the annular convex edge 11 and engaged therewith is provided at the top of the box cover 2. After the merchant packs the takeout, a plurality of heat-insulating lunch boxes are stacked. The engagement between the annular convex edge 11 and the annular groove 21 reduces the probability that the top heat-insulating lunch box falls due to external force. In addition, during the delivery process by the deliveryman, the cooperation between the annular convex edge 11 and the annular groove 21 helps to enhance the stability of the stacked heat-insulating lunch boxes and reduces the probability of the takeout tipping over.

[0036] An annular extension part 12 extending outward is integrally formed at a position near the edge of the top of the box body 1, and an annular inner edge 22 engaged with the annular extension part 12 is integrally formed at the intersection between the bottom of the box cover 2 and the inner side of the box cover 2. The annular inner edge 22 extends toward the side close to the axis of the box cover 2. After the box cover 2 is closed, the engagement between the annular extension part 12 and the annular inner edge 22 ensures the stability during the closing process of the box cover 2.

[0037] An annular anti-slip groove 23 is provided at a position near the outer wall of the box cover 2 at the bottom of the box cover 2. The provision of the annular anti-slip groove 23 facilitates the customer to place the finger in the annular anti-slip groove 23 and open the box cover 2 when opening the box cover 2, reducing the probability of slipping.

[0038] Embodiment 2

[0039] As Figure 7 shown, the difference between this embodiment and Embodiment 1 is only that: the heat-insulating composite layer 3 in the box body 1 extends to the top of the box body 1. When the box cover 2 is in the closed state, the heat-insulating composite layer 3 at the bottom of the box cover 2 is in close contact with the heat-insulating composite layer 3 at the top of the box body 1.

[0040] Embodiment 3

[0041] As Figures 8-9 shown, the difference between this embodiment and Embodiment 1 is only that: a flared groove 13 is provided at a position near the top of the inner wall of the box body 1, and a relief groove 24 engaged with the top edge of the box body 1 is provided between the heat-insulating composite layer 3 on the box cover 2 and the inner wall of the box cover 2. The bottom of the heat-insulating composite layer 3 on the box cover 2 is in close contact with the top of the heat-insulating composite layer 3 at the flared groove 13.

[0042] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A heat-insulating lunch box with a PE aluminum foil composite layer, comprising a box body (1) and a box cover (2) snap-fitted with an opening of the box body (1), wherein: The inner wall of the box body (1) is provided with a thermal insulation composite layer (3), or the inner wall of the box body (1) and the inner wall of the box cover (2) are both provided with a thermal insulation composite layer (3); The bottom of the box body (1) is integrally formed with an annular convex edge (11) near its edge, and the top of the box cover (2) is provided with an annular groove (21) coaxial with the annular convex edge (11) and snap-fitted therewith; The top of the box body (1) is integrally formed with an outwardly extending annular extension portion (12) at a position close to the edge thereof, and the intersection between the bottom of the box cover (2) and the inner side of the box cover (2) is integrally formed with an annular inner edge (22) that is buckled and matched with the annular extension portion (12), and the annular inner edge (22) extends toward a side close to the axis of the box cover (2); An annular anti-slip groove (23) is provided at the bottom of the box cover (2) near the outer wall of the box cover (2); The thermal insulation composite layer (3) in the box body (1) extends to the top of the box body (1); when the box cover (2) is in a closed state, the thermal insulation composite layer (3) at the bottom of the box cover (2) is tightly fitted with the thermal insulation composite layer (3) at the top of the box body (1); The inner wall of the box body (1) is provided with a flaring groove (13) near the top thereof, a clearance groove (24) cooperating with the top edge of the box body (1) is provided between the thermal insulation composite layer (3) on the box cover (2) and the inner wall of the box cover (2), and the bottom of the thermal insulation composite layer (3) on the box cover (2) is tightly fitted with the top of the thermal insulation composite layer (3) at the flaring groove (13).

2. The heat-insulating lunch box according to claim 1, characterized in that: The thermal insulation composite layer (3) comprises a PE layer (31) adhered to and fixed to the inner wall of the box body (1) or the inner wall of the box cover (2), and an aluminum foil layer (32) composited to the surface of the PE layer (31).

3. The heat-insulating lunch box according to claim 2, characterized in that: The thickness of the PE layer (31) is 0.06 mm-0.07 mm, and the thickness of the aluminum foil layer (32) is 0.05 mm-0.2 mm.

4. The heat-insulating lunch box according to claim 2, characterized in that: The thermal insulation composite layer (3) further comprises a honeycomb layer (33) arranged between the aluminum foil layer (32) and the PE layer (31).

5. The heat-insulating lunch box according to claim 4, characterized in that: The thickness of the honeycomb layer (33) is 0.1 mm-0.15 mm.

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