A rapid heating lunch box

Abstract

The utility model provides a kind of fast heating lunch box, including shell and upper cover, shell is provided with inner bag, heating sheet film and the control circuit of being electrically connected with heating sheet film in, heating sheet film includes the bottom heating sheet and the first side heating sheet of being the sheet structure, bottom heating sheet is used to adhere in the bottom of inner bag, first side heating sheet has two and is respectively used to adhere on the two opposite sides of inner bag, first side heating sheet and bottom heating sheet between being provided with the connecting sheet for connecting.The utility model's fast heating lunch box, bottom heating sheet is heated while in the bottom of inner bag, two first side heating sheets are respectively on the two opposite sides of inner bag and three-dimensional heating is carried out to inner bag, increase heating area, heat one side from the bottom of inner bag and heat upward, the other side from the two sides of inner bag and radiate to center synchronously, shorten heat conduction path, reduce the local temperature difference of food in inner bag, reach the effect of fast and even heating.

Description

Technical Field

[0001] This utility model relates to the technical field of lunch boxes, and more specifically to a fast-heating lunch box. Background Technology

[0002] More and more people prefer to bring their own prepared meals to work or travel, as it is both safe and healthy. As a result, portable lunch boxes with heating functions have appeared on the market. Traditional heated lunch boxes usually have an electric heating module at the bottom of the inner pot. Heat can only be transferred to the food from the bottom of the inner pot, which is not very efficient. The heating is slow and the heat conduction is uneven, resulting in uneven temperature of the food. Often, the bottom is too hot while the surface is still cold. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a fast-heating lunch box that can quickly and evenly heat the food in the inner pot.

[0004] The technical solution of this utility model is to provide a fast-heating lunch box, including a shell and a top cover. The shell is provided with an inner liner, a heating element film, and a control circuit electrically connected to the heating element film. The heating element film includes a bottom heating element and a first side heating element, both of which are sheet-like structures. The bottom heating element is used to adhere to the bottom of the inner liner. There are two first side heating elements, which are respectively used to adhere to two opposite sides of the inner liner. A connecting piece is provided between the first side heating element and the bottom heating element for connection.

[0005] Compared with the prior art, the rapid heating lunch box of this utility model has the following advantages: the bottom heating element and the two first side heating elements are respectively attached to the bottom and two opposite sides of the inner pot. While heating the bottom of the inner pot, it can also heat the inner pot in three dimensions, so that heat is transferred upward from the bottom of the inner pot on one side and simultaneously radiated to the center from the two sides of the inner pot on the other side, increasing the heating area, shortening the heat conduction path, reducing the local temperature difference of the food in the inner pot, and achieving the effect of rapid and uniform heating; the first side heating elements and the bottom heating elements are connected only by a connecting piece, which not only facilitates the overall processing and manufacturing of the heating element film, but also saves materials. Changing the bending angle of the connecting piece can make the first side heating elements and the bottom heating elements fit better with the inner pot, which facilitates the assembly of the heating element film with the inner pot.

[0006] Preferably, the inner liner has four sides, and the heating element film also includes two sheet-like second side heating elements, each designed to be attached to one of the other two opposite sides of the inner liner. A connecting piece is provided between the second side heating elements and the bottom heating element for connection. With this structure, the two first side heating elements and the two second side heating elements are attached to the perimeter of the inner liner, forming a surround heating structure. This allows heat to radiate synchronously from the perimeter to the center of the inner liner, resulting in better reduction of local temperature differences and improved rapid and uniform heating.

[0007] Preferably, the heating element film is a one-piece structure, with connecting tabs for bending. The first and second side heating elements stand upright above the bottom heating element via the corresponding connecting tabs after bending, and the first and second side heating elements are not connected to each other. With this structure, the heating element film is a one-piece structure, facilitating the overall manufacturing of the heating element film; the first and second side heating elements are not connected to each other, avoiding mutual interference and adhesion to the four sides of the inner liner; the first and second side heating elements can be adhered to the four sides of the inner liner via the corresponding connecting tabs after bending, facilitating the assembly of the heating element film with the inner liner; and since only the connecting tabs are used for bending, highly malleable metal can be used only in certain areas, saving material.

[0008] Preferably, the heating element membrane has an adhesive layer for adhering it to the inner liner. This structure facilitates the assembly of the heating element membrane and the inner liner.

[0009] Preferably, the top cover is provided with a vent hole, and a sealing silicone plug is provided on the vent hole to seal it. With this structure, the inner liner can be heated when the top cover is closed, and the sealing silicone plug can be removed during heating to allow the hot air inside the inner liner to escape through the vent hole.

[0010] Preferably, the top cover is provided with two limiting grooves, and a date bar and a month bar are respectively provided in the two limiting grooves. Each of the date bar and month bar has a slider. One slider is used to slide on the month bar to indicate the selected month, and the other slider is used to slide on the date bar to indicate the selected date. This structure enables the fast-heating lunch box of this invention to display the date, increasing its fun and practicality.

[0011] Preferably, the slider has a U-shaped groove structure, with a display hole provided on one side wall of the U-shaped groove. The date and month bars are respectively embedded in the corresponding U-shaped grooves of the sliders, allowing the sliders to slide left and right along the date or month bars. The display hole is used to display the month indicated by the slider on the month bar or the date indicated by the date bar. This structure, with its U-shaped groove, facilitates the assembly of the date and month bars with their corresponding sliders; the display hole on the slider allows for easy display of the month and date indicated by the slider. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the fast-heating lunch box of this utility model.

[0013] Figure 2 This is an exploded view of the rapid heating lunch box of this utility model.

[0014] Figure 3 This is a schematic diagram of the heating element membrane of the rapid heating lunch box of this utility model.

[0015] Figure 4 This is an exploded view of the top cover of the fast-heating lunch box of this utility model.

[0016] As shown in the figure: 1. Shell, 2. Inner liner, 3. Top cover, 3-1. Vent, 3-2. Limiting groove, 4. Heating element film, 4-1. Bottom heating element, 4-2. First side heating element, 4-3. Second side heating element, 4-4. Connecting piece, 5. Sealing silicone plug, 6. Date bar, 7. Month bar, 8. Slider. Detailed Implementation

[0017] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0018] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0019] It should also be understood that the terms "comprising," "having," "including," and "containing," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. Furthermore, when expressions such as "...at least one" appear after a list of listed features, they modify the entire listed feature, not individual elements in the list.

[0020] like Figure 1 and Figure 2 As shown, the fast-heating lunch box of this utility model includes a shell 1, a heating element membrane 4, an inner liner 2, and a top cover 3. The inner liner 2 is disposed inside the shell 1, and the heating element membrane 4 is disposed between the inner liner 2 and the shell 1. The shell 1 is also provided with a control circuit (not shown) that is electrically connected to the heating element membrane 4. The top cover 3 is used to cover the shell 1.

[0021] like Figure 3 As shown, the heating element film 4 is a one-piece structure, including a bottom heating element 4-1, two first side heating elements 4-2, and two second side heating elements 4-3, all of which are sheet-like. The bottom heating element 4-1 is a quadrilateral structure, and a connecting piece 4-4 is provided on each of the four sides of the bottom heating element 4-1. The two first side heating elements 4-2 are connected to two opposite connecting pieces 4-4, and the two second side heating elements 4-3 are connected to two other opposite connecting pieces 4-4. The connecting pieces 4-4 are used for bending. The first side heating elements 4-2 and the second side heating elements 4-3 stand upright on their sides above the bottom heating element 4-1 by bending the corresponding connecting pieces 4-4. The first side heating elements 4-2 and the second side heating elements 4-3 are not connected to each other.

[0022] The inner pot 2 has a bottom and four sides. A bottom heating element 4-1 is attached to the bottom of the inner pot 2. Two first side heating elements 4-2 are attached to two opposite sides of the inner pot 2, and two second side heating elements 4-3 are attached to the other two opposite sides of the inner pot 2. Thus, while the bottom heating element 4-1 heats the bottom of the inner pot, the two first side heating elements 4-2 and the two second side heating elements 4-3, attached to the perimeter of the inner pot 2, create a three-dimensional, surround heating effect. This allows heat to radiate synchronously from the perimeter to the center of the inner pot, reducing localized temperature differences in the food and achieving rapid and uniform heating.

[0023] An adhesive layer is provided on the heating element film 4. The adhesive layer is used to attach the bottom heating element 4-1, the first side heating element 4-2, and the second side heating element 4-3 of the heating element film 4 to the corresponding positions of the inner liner 2, so as to achieve a close fit and assembly with the inner liner 2.

[0024] like Figure 4As shown, the upper cover 3 is provided with a vent 3-1, and a sealing silicone plug 5 is provided on the vent 3-1 to seal the vent 3-1. Two limiting grooves 3-2 are provided on both sides of the vent 3-1 on the upper cover 3. A date bar 6 and a month bar 7 are respectively provided in the two limiting grooves 3-2. A slider 8 is provided on each of the date bar 6 and month bar 7. The slider 8 has a U-shaped groove structure, and the date bar 6 and month bar 7 are respectively embedded in the corresponding U-shaped groove of the slider 8. The slider 8 can slide left and right along the date bar 6 or month bar 7. One slider 8 is used to slide on the month bar 7 to indicate the selected month, and the other slider 8 is used to slide on the date bar 6 to indicate the selected date. A display hole is provided on one side wall of the U-shaped groove, and the display hole is used to display the month on the month bar 7 or the date on the date bar 6 indicated by the slider 8.

[0025] In other embodiments, the heating element film 4 may consist only of a bottom heating element 4-1, which is a sheet-like structure, and two first side heating elements 4-2, without the two second side heating elements 4-3. The bottom heating element 4-1 and the two first side heating elements 4-2 are respectively attached to the bottom and two opposite sides of the inner pot 2. While the bottom heating element 4-1 heats the bottom of the inner pot, the two first side heating elements 4-2 can heat the inner pot in three dimensions, so that heat is transferred upward from the bottom of the inner pot on one side and simultaneously radiated to the center from both sides of the inner pot on the other side. This can also reduce the local temperature difference of the food in the inner pot and achieve the effect of rapid and uniform heating.

[0026] The above are merely specific embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Any modifications or equivalent substitutions to this utility model without departing from its spirit and scope should be covered within the protection scope of the claims of this utility model.

Claims

1. A fast-heating lunch box, comprising a shell (1) and a top cover (3), characterized in that, The shell (1) is provided with an inner liner (2), a heating element membrane (4) and a control circuit electrically connected to the heating element membrane (4). The heating element membrane (4) includes a bottom heating element (4-1) and a first side heating element (4-2), both of which are sheet-like structures. The bottom heating element (4-1) is used to attach to the bottom of the inner liner (2). There are two first side heating elements (4-2), which are respectively used to attach to two opposite sides of the inner liner (2). A connecting piece (4-4) is provided between the first side heating element (4-2) and the bottom heating element (4-1) for connection.

2. The rapid heating lunch box according to claim 1, characterized in that, The inner liner (2) has four sides. The heating element film (4) also includes a second side heating element (4-3) with a sheet-like structure. There are two second side heating elements (4-3) and they are respectively used to attach to the other two opposite sides of the inner liner (2). A connecting piece (4-4) is provided between the second side heating element (4-3) and the bottom heating element (4-1) for connection.

3. The rapid heating lunch box according to claim 2, characterized in that, The heating element film (4) is a one-piece structure. The connecting piece (4-4) is used for bending. The first side heating element (4-2) and the second side heating element (4-3) are bent and stand on the side above the bottom heating element (4-1) by the corresponding connecting piece (4-4). The first side heating element (4-2) and the second side heating element (4-3) are not connected to each other.

4. The rapid heating lunch box according to claim 3, characterized in that, An adhesive layer is provided on the heating element membrane (4), which is used to attach the heating element membrane (4) to the inner liner (2).

5. The rapid heating lunch box according to any one of claims 1 to 4, characterized in that, The top cover (3) is provided with an exhaust hole (3-1), and a sealing silicone plug (5) is provided on the exhaust hole (3-1). The sealing silicone plug (5) is used to seal the exhaust hole (3-1).

6. The rapid heating lunch box according to claim 5, characterized in that, The top cover (3) is provided with two limiting grooves (3-2), and a date bar (6) and a month bar (7) are respectively provided in the two limiting grooves (3-2). A slider (8) is provided on each of the date bar (6) and the month bar (7). One slider (8) is used to slide on the month bar (7) to indicate the selected month, and the other slider (8) is used to slide on the date bar (6) to indicate the selected date.

7. The rapid heating lunch box according to claim 6, characterized in that, The slider (8) has a U-shaped groove structure. A display hole is provided on one side wall of the U-shaped groove. The date bar (6) and month bar (7) are respectively embedded in the U-shaped groove of the corresponding slider (8). The slider (8) can slide left and right along the date bar (6) or month bar (7). The display hole is used to display the month on the month bar (7) or the date on the date bar (6) indicated by the slider (8).

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