CN212233468U - Electric lunch box - Google Patents

Abstract

The utility model relates to an electric lunch box, which comprises an upper cover, a base and an inner container arranged between the upper cover and the base; the electric lunch box further comprises an electric heating film, wherein a mounting groove is formed in the bottom of the inner container, and the electric heating film is fixedly arranged in the mounting groove. The electric lunch box heats food in the inner container through the electric heating film, and the food is not required to be indirectly heated between the inner container and the base in addition through a water adding mode, so that the electric lunch box is not only convenient for a user to use, but also can effectively avoid the heating defect caused by scale.

Description

Electric lunch box

Technical Field

The utility model relates to a kitchen appliance technical field especially relates to an electric lunch box.

Background

The continuous innovation of modern cooking appliances brings great convenience to the family life of residents. In order to meet the requirement of a user on daily portability, the electric lunch box capable of preserving heat and heating is sold on the market. The traditional heatable electric lunch box is mostly heated by a PTC component or a heating plate, and the PTC component or the heating plate is fixed at the bottom of a water tank; adding water into the water tank; after the electric lunch box is connected with an external power supply, water is heated to generate steam through the operation of the PTC component or the heating plate, and then the purpose of heating food can be realized through the steam.

However, water is heated through the PTC component or the heating plate, so that scale is easily generated on the surface of the PTC component or the heating plate; and the scales are not easy to remove after use, thereby affecting the heating efficiency of the PTC component or the heating plate.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide an improved electric lunch box to solve the above problems, and food in the inner container is heated through the electric heating film, and food is not required to be indirectly heated between the inner container and the base in addition through a water adding mode, so that the electric lunch box is convenient for a user to use, and the heating defect caused by water scale can be effectively avoided.

An electric lunch box comprises an upper cover base and an inner container accommodated between the upper cover and the base; the electric lunch box further comprises an electric heating film, wherein a mounting groove is formed in the bottom of the inner container, and the electric heating film is fixedly arranged in the mounting groove.

Further, the electric heating film is fixedly arranged on the outer side face of the bottom of the inner container. So set up, not only can make the electric heat membrane be in a relative concealed mounted position, can avoid moreover because of the mistake bumps the problem that the electric heat membrane leads to the user to be burnt.

Furthermore, the groove depth of the mounting groove is larger than or equal to the thickness of the electric heating film. So set up, when the inner bag was taken out alone, can also prevent overheated electric heat membrane direct contact mesa, and then avoid the electric heat membrane firing mesa the condition to take place.

Furthermore, a plurality of supporting protrusions are convexly arranged on the outer side face of the bottom of the inner container, and the mounting groove is accommodated in an area formed by the surrounding of the supporting protrusions. So set up for the electric heat membrane of holding in the mounting groove enough forms complete one piece formula, avoids the perforation or the special-shaped setting of electric heat membrane, so that electric heat membrane's processing and installation. At this moment, the electric heat membrane is structurally more general, has reduced the loss of cost simultaneously.

Further, a plurality of storage lattices spaced from each other are formed inside the inner container, and the electrothermal film is at least partially overlapped with the bottom wall of each storage lattice. So set up to make the electric heat membrane occupy the bottom of inner bag as far as possible, so that the electric heat membrane can the corresponding diapire of each matter storage lattice of heating. At this moment, the electrothermal film can be better the heating to the food in each matter storing check.

Furthermore, the electric heating film is fixedly glued on the outer side surface of the bottom of the inner container. So set up, can make the electric heat membrane installation simple relatively, and installation cost is lower.

Further, the electric heating film also extends to the outer side face of the side portion of the inner container. So set up, the electric heat membrane makes the food in inner bag holding chamber thermally equivalent through the bottom and the lateral part of inner bag to corresponding promotion heating efficiency.

Furthermore, the shape of the electric heating film is matched with that of the mounting groove. So set up, the electric heat membrane makes the food of inner bag holding intracavity be heated evenly through the bottom of inner bag.

Further, the inner container comprises a container body and a partition connected to the inner side face of the container body, and the container body and the partition are integrally formed in a die-casting mode. By the arrangement, the sealing performance between the liner body and each partition plate can be ensured; and the installation process of the electric lunch box can be reduced as much as possible.

Furthermore, the upper cover comprises a cover body and a convex edge which is convexly arranged on the inner side surface of the cover body, the cover body is clamped on the outer side surface of the inner container, and the convex edge is abutted against the inner side surface of the inner container and is in sealing connection with the inner side surface of the inner container. By the arrangement, the sealing performance between the upper cover and the inner container can be further enhanced, so that the food in the inner container is prevented from overflowing.

This embodiment provides an electric lunch-box, through the food in the electric heat membrane heating inner bag, need not in addition to come indirect heating food through watered mode between inner bag and the base, not only the user of being convenient for uses, can effectively avoid the heating drawback because of the incrustation scale brings moreover.

Drawings

FIG. 1 is a schematic view of an electric lunch box according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a base assembly in the electric lunch box shown in FIG. 1;

FIG. 3 is a schematic sectional view of an electric lunch box according to another embodiment of the present invention;

FIG. 4 is an enlarged view of the electric lunch box shown in FIG. 3 at A;

FIG. 5 is a schematic structural view of the upper cover of the electric lunch box shown in FIG. 3;

FIG. 6 is a disassembled view of the electric lunch box shown in FIG. 3;

fig. 7 is another view angle of the inner container of the electric lunch box shown in fig. 6.

Description of the element reference numerals

100. An electric lunch box; 10. an upper cover; 11. a cover body; 12. a side edge; 13. a convex edge; 14. a seal ring; 15. a connecting portion; 20. a base assembly; 21. a base; 211. a bottom wall; 2111. a support portion; 212. a side wall; 213. A liner installation cavity; 22. an inner container; 221. a bottom; 2211. a support boss; 2212. a mounting flange; 2213. Mounting grooves; 222. a side portion; 2221. an extension portion; 2222. a limiting convex part; 223. an accommodating cavity; 2231. A storage grid; 224. a partition plate; 30. an electrothermal film.

The present invention is described in further detail with reference to the drawings and the detailed description.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, fig. 1 is a schematic view illustrating a disassembled electric lunch box 100 according to an embodiment of the present invention.

The utility model provides an electric lunch box 100 used for keeping warm or heating food in the electric lunch box 100. In the actual use process, the electric lunch box 100 can heat and preserve the food in the electric lunch box 100 under the action of the external power supply.

Of course, the structure of the electric lunch box 100 can also be applied to other cooking appliances, such as an electric rice cooker, etc., as long as the cooking appliance for cooking food is realized by the heating function.

The electric lunch box 100 comprises an upper cover 10 and a base component 20, wherein the upper cover 10 covers the base component 20 to prevent heat in the electric lunch box 100 from escaping outwards. The upper cover 10 is used for covering the opening of the base assembly 20; the base assembly 20 is used to contain food and to heat or keep the food warm.

Specifically, the upper cover 10 includes a cover body 11. The cover 11 is roughly in the shape of a square plate, the periphery of the cover 11 extends towards the base assembly 20 and forms a side edge 12; the side edges 12 are adapted to interfit with the base member 20. It is understood that in other embodiments, the cover 11 may be correspondingly disposed according to the shape of the opening of the base assembly 20, such as an arc surface with a circular cross section, as long as the cover can be disposed on the base assembly 20 and correspondingly cover the opening of the base assembly 20; the cover 11 may be directly formed as a plate-like member without providing the side edge 12, and correspondingly, the base assembly 20 is correspondingly provided with a step surface for abutting against the cover 11 and achieving the purpose of covering.

Referring to fig. 2 to 4, fig. 2 is a schematic structural view of the base assembly 20 in the lunch box 100 shown in fig. 1; FIG. 3 is a schematic sectional view of the electric lunch box 100 shown in FIG. 1; fig. 4 is an enlarged schematic view of the electric lunch box 100 shown in fig. 3 at a.

The base assembly 20 includes a base 21 and an inner container 22, and the inner container 22 is disposed in the base 21. Wherein, the base 21 is used for accommodating the inner container 22; the inner container 22 is used for containing and heating food.

In the present embodiment, the base 21 has a substantially open square box shape. The base 21 comprises a bottom wall 211 and a side wall 212 surrounding the periphery of the bottom wall 211; the bottom wall 211 and the side wall 212 enclose a liner installation cavity 213. The bottom wall 211 is for supporting the base 21; the side wall 212 is used for matching with the bottom wall 211 and forming an inner container installation cavity 213; the inner container installation cavity 213 is used for accommodating the inner container 22, and the shape and size of the cavity of the inner container installation cavity 213 are matched with those of the inner container 22. In order to make the volume of the inner chamber accommodating cavity 223 as large as possible, the correspondingly opened inner container mounting cavity 213 is also substantially rectangular. It can be understood that the shape and size of the base 21 can be set according to the actual requirement of the electric lunch box 100, the utility model discloses do not limit the base 21 and the specific shape and structure of the inner container installation cavity 213 provided on the base 21.

In the present embodiment, the square base 21 has four side walls 212, and the four side walls 212 are connected to each other by round chamfers. So set up to base 21 machine-shaping, and make electric lunch-box 100 whole more succinct pleasing to the eye. It is understood that, in other embodiments, in consideration of the requirement of the user to conveniently carry the lunch box 100, the side walls 212 on the two opposite sides of the base 21 may be respectively provided with a handle or the like for the user to take the lunch box 100.

In the present embodiment, a support portion 2111 is provided on the outer side surface of the bottom wall 211 of the base 21; the support portion 2111 extends outwardly along the surface of the base 21 to form a protrusion, and is annularly arranged along the center of the bottom wall 211 of the base 21. The four supporting portions 2111 have the same height, so that the base 21 can be smoothly placed on the table top, and large-area heat transfer and friction between the bottom wall 211 of the base 21 and the table top are avoided.

Preferably, the number of the supporting portions 2111 is set to four, and the heights of the four supporting portions 2111 are equal. The four support portions 2111 are respectively disposed at rounded positions relatively close to the junctions of the four side walls 212 of the base 21, so that the support portions 2111 can stably support the electric lunch box 100 and are less likely to cause problems such as a roll. It is understood that, in other embodiments, the number of the supporting portions 2111 may be set to one, two, or more than three as long as the function of supporting the base 21 can be achieved.

In the present embodiment, the inner container 22 is substantially identical in shape to the base 21 and is provided in the inner container mounting cavity 213 of the base 21. The inner container 22 includes a container body. The container body includes a bottom 221 and a side 222 surrounding the bottom 221, wherein the bottom 221 and the side 222 surround to form a receiving cavity 223 for receiving food. It can be understood that the shape of the inner container 22 can be set according to actual requirements, for example, the inner container 22 with the side portion 222 being a cylindrical surface, as long as the inner container can accommodate food.

In consideration of the fact that the inner container 22 can contain various objects as much as possible, a partition plate 224 is arranged in the containing cavity 223 of the inner container 22; the partition 224 is connected to the inner side of the container body and divides the accommodating chamber 223 of the inner container 22 into a plurality of storage compartments 2231. Preferably, the inner container 22 and the partition 224 are integrally formed by die-casting, so that the number of steps for mounting the electric lunch box 100 is reduced as much as possible, and the plurality of storage compartments 2231 are not easily leaked from each other.

Considering the actual situation that the inner container 22 is not completely attached to the inner container installation cavity 213 of the base 21, in order to avoid the problem that the soup or other liquid of food is splashed between the inner container 22 and the base 21 and is difficult to clean, the side portion 222 of the inner container 22 is turned outwards to form the extending portion 2221; the inner container 22 is mounted on the side wall 212 of the base 21 via the extension 2221. The extension portion 2221 is used to shield a gap between the inner container 22 and the base 21, and the inner container 22 can be provided on the base 21.

In one embodiment, in order to prevent the relative movement between the upper cover 10 and the base assembly 20 when the upper cover 10 and the base assembly 20 are closed, the extending portion 2221 extends toward the cover 11 and forms a limit protrusion 2222; the limit protruding portion 2222 abuts against the side edge 12 of the upper cover 10, and one side of the limit protruding portion 2222 is flush with the inner side surface of the inner container 22. The limit projection 2222 serves to limit the movement of the upper cover 10 with respect to the base assembly 20.

With such an arrangement, not only the upper cover 10 can seal the accommodating cavity 223 of the inner container 22, but also the relative movement between the upper cover 10 and the base assembly 20 can be limited. It can be understood that if the tightness between the inner container 22 and the upper cover 10 is not considered to avoid the liquid in the inner container installation cavity 213 from spilling, the upper cover 10 can directly abut against the periphery of the base 21 and cooperate with the cover to set the base assembly 20; if the cleaning problem of the inner container 22 is not considered, one side of the limiting protrusion 2222 may not be flush with the inner side of the inner container 22.

Referring to fig. 5, fig. 5 is a schematic structural view of the upper cover 10 of the electric lunch box 100 shown in fig. 1.

Correspondingly, in order to enable the inner container 22 to be smoothly connected to the upper cover 10, the inner side surface of the cover body 11 extends towards the base assembly 20 and forms an annular convex edge 13; the convex edge 13 is disposed in the area surrounded by the side edge 12 of the upper cover 10, and is disposed parallel to the side edge 12. The flange 13 is adapted to abut against the inner side surface of the inner container 22. The side edge 12 and the convex edge 13 of the upper cover 10 and the limit bulge of the inner container 22 form tight fit, and the upper cover 10 is buckled on the inner container 22.

Preferably, in order to further enhance the sealing performance between the upper cover 10 and the inner container 22, a sealing ring 14 is further arranged between the convex edge 13 and the inner container 22; the sealing ring 14 is used for sealing the accommodating cavity 223 of the inner container 22. With such an arrangement, the sealing performance between the upper cover 10 and the inner container 22 can be further enhanced to prevent the food in the inner container from overflowing.

In this embodiment, the sealing ring 14 may be sleeved on the outer periphery of the convex edge 13, and when the upper cover 10 is covered with the inner container 22, the sealing ring 14 abuts against the inner side surface of the side portion 222 of the inner container 22; it is understood that in other embodiments, the sealing ring 14 may be fixed on the inner side surface of the inner container 22 relatively close to the outer extension portion 2221, as long as the sealing ring is capable of being matched with the upper cover 10 and sealing the accommodating cavity 223 of the inner container 22.

Of course, the cover 11 of the upper cover 10 may be provided with a corresponding vent hole (not shown) to prevent the air pressure in the electric lunch box 100 from being too high.

The sealing ring 14 is generally made of a material having elasticity, such as silicone rubber. With the arrangement, the gap between the convex edge 13 and the inner container 22 can be gradually reduced by pressing the sealing ring 14 between the upper cover 10 and the inner container 22, and the accommodating cavity 223 of the inner container 22 is further sealed.

In consideration of the problem that the clearance between the convex edge 13 and the side edge 12 is easy to cause inconvenient cleaning of the upper cover 10, a connecting part 15 is also arranged between the convex edge 13 and the side edge 12; the connecting portion 15 is substantially annular, and the inner edge 12 of the connecting portion 15 is connected to the convex edge 13, and the outer edge 12 is connected to the side edge 12. The connecting portion 15 is used for sealing a part of the gap formed between the protruding edge 13 and the side edge 12, and can be abutted by the limit protruding portion 2222 of the inner container 22. Meanwhile, the connecting portion 15 can also strengthen the connecting strength between the convex edge 13 and the side edge 12.

Referring to fig. 6, fig. 6 is a schematic view illustrating a disassembled electric lunch box 100 according to another embodiment of the present invention.

In order to heat the food in the electric lunch box, the existing electric lunch box is generally provided with a heating element such as a PTC component or a heating plate, and the PTC component or the heating plate is fixed on the bottom surface of the water tank; then the water in the water tank is heated to generate steam through the operation of the PTC component or the heating plate, and the purpose of heating food can be realized through the steam. However, water is heated through the PTC component or the heating plate, so that scale is easily generated on the surface of the PTC component or the heating plate; and the scales are not easy to be removed, thereby affecting the heating efficiency of the PTC component or the heating plate.

In order to avoid the influence of the scale on the heating efficiency of the PTC component or the heating plate, the electric heating film 30 is provided as a heating element in the electric lunch box 100 of the present invention to replace the conventional PTC component or heating plate; the electric lunch box 100 heats the food in the inner container 22 through the electric heating film 30, so that the heat of the electric heating film 30 is transferred to the food, and accordingly, the step of indirectly heating the food through water is simplified. So set up, not only can avoid reducing heating element's heating efficiency, can also effectively avoid the drawback that brings because of the incrustation scale originally.

In the present embodiment, the electric heating film 30 is substantially sheet-shaped and is disposed between the base 21 and the inner container 22. Specifically, the electrothermal film 30 is mounted on the outer side surface of the bottom 221 of the inner container 22. So set up, not only can make electric heat membrane 30 be in a relative hidden mounted position, can avoid moreover because of the mistake bumps the problem that electric heat membrane 30 and lead to the user to be burnt.

Considering the heating efficiency and heating effect of the electrothermal film 30, the electrothermal film 30 can also extend to the outer side of the side 222 of the inner container 22. The side 222 of the bladder 22 may be any one or more of the four sides 222 of the bladder 22. So set up, not only can correspondingly promote the heating efficiency of electric heat membrane 30, can also make the food thermally equivalent in inner bag 22 holding chamber 223.

Because the electrothermal film 30 is arranged on the outer side surface of the inner container 22, the heat of the electrothermal film 30 needs to be transferred to the accommodating cavity 223 of the inner container 22 through the inner container 22, and therefore the inner container 22 is made of metal with higher heat conduction efficiency, such as food-grade stainless steel or aluminum alloy.

Referring to fig. 7, fig. 7 is a schematic structural view of the inner container 22 of the electric lunch box 100 shown in fig. 6 from another view angle.

In this embodiment, in order to prevent the electric heating film 30 from directly contacting the base 21 and directly transferring heat with the base 21, the bottom 221 of the inner container 22 is convexly provided with four supporting protrusions 2211 towards the base 21, and the number of the supporting protrusions 2211 is four, and the supporting protrusions 2211 are respectively arranged at four corners of the bottom 221 of the inner container 22. Meanwhile, the height of the support projection 2211 is greater than or equal to the groove depth of the mounting groove 2213. So set up, when inner bag 22 takes out alone, can also prevent that the electrothermal film 30 of holding in mounting groove 2213 from overheated ground direct contact mesa, and then avoid the condition emergence of electrothermal film 30 burning mesa.

It is understood that in other embodiments, the supporting protrusion 2211 may also be disposed on the base 21, as long as it can support the inner container 22 and prevent the electric heating film 30 from directly contacting the base 21; meanwhile, the number of the supporting protrusions 2211 may be set according to actual conditions, as long as the liner 22 can be stably manufactured.

In this embodiment, the electric heating film 30 is fixed to the bottom 221 of the inner container 22 by gluing, so that the installation process of the electric heating film 30 is relatively simple, and the installation cost is relatively low. The glue used for gluing the electrothermal film 30 needs to have certain heat resistance, for example, the glue still has good gluing property at 100-400 ℃ to prevent the electrothermal film 30 from separating from the bottom 221 of the inner container 22 at high temperature. It can be understood that in other embodiments, the electrothermal film 30 can be connected to the inner container 22 by embedding, clamping, or screwing, as long as the electrothermal film 30 can fix the bottom 221 of the inner container 22.

In the present embodiment, in consideration of the fixing property of the gluing position of the electric heating film 30, the bottom 221 of the inner container 22 extends toward the base 21 and forms a mounting flange 2212, and the mounting flange 2212 encloses a mounting groove 2213; the size and the shape of the mounting groove 2213 are matched with the shape of the electric heating film 30; the electric heating film 30 is arranged in the mounting groove 2213, and the depth of the mounting groove 2213 is larger than or equal to the thickness of the electric heating film 30. So set up, can avoid electric heat membrane 30 direct contact in base 21, further avoid electric heat membrane 30's heat to outwards escape through base 21.

It is understood that in other embodiments, the mounting slot 2213 may also be formed by invagination of the bottom 221 of the inner bladder 22, and the mounting flange 2212 described above may be correspondingly omitted.

Preferably, the depth of the mounting groove 2213 is 1 mm-2 mm greater than the thickness of the electric heating film 30. So set up, the electric heat membrane 30 can enough be placed well to mounting groove 2213, moreover to inner bag 22 whole size and holding chamber 223 production influence less.

In this embodiment, the shape of the electrothermal film 30 is set to be rectangular according to the shape of the bottom 221 of the inner container 22, so that the electrothermal film 30 occupies the bottom 221 of the inner container 22 as much as possible, and the electrothermal film 30 can correspondingly heat the bottom wall (not numbered) of each storage cell 2231. At this time, the electric heating film 30 can heat the food in each storage compartment 2231 well. It is understood that in other embodiments, the shape of the electric heating film 30 may not be correspondingly configured according to the shape of the bottom 221 of the inner container 22, such as a circular shape, as long as the electric heating film can be attached to the bottom 221 or the side 222 of the inner container 22 and heated.

Further, since the bottom 221 of the inner container 22 is provided with a plurality of corresponding supporting protrusions 2211, in order to make the electric heating film 30 escape from the supporting protrusions 2211, the mounting groove 2213 is provided in an area formed by the supporting protrusions 2211 surrounding each other. So set up for electric heat membrane 30 can form complete one piece formula, avoids the perforation or the dysmorphism setting of electric heat membrane 30, so that electric heat membrane 30's processing and installation.

In one embodiment, the inner container 22 is connected to the base 21 in a snap-fit manner or directly overlapped with the base, i.e. the inner container 22 can be directly taken out in a normal use state. When the inner container 22 is connected to or directly connected to the base 21, the electric lunch box 100 is electrically connected to the base 21 through the coupler between the electric heating film 30 and the base 21, and further connected to an external power source through a wire arranged on the base 21.

In another embodiment, the inner container 22 and the base 21 are fixedly connected, i.e. the inner container 22 and the base 21 need to be detached from each other by an external tool. When the inner container 22 is fixedly connected with the base 21, the electric heating film 30 is directly connected with an external power supply through a lead penetrating through the base 21.

This embodiment provides an electric lunch box 100, through the food in the electric heat membrane 30 heating inner bag 22, need not in addition to come indirect heating food through the mode of adding water between inner bag 22 and base 21, not only the user of being convenient for uses, can effectively avoid the heating drawback because of the incrustation scale brings moreover.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. An electric lunch box comprises an upper cover (10), a base (21) and an inner container (22) accommodated between the upper cover (10) and the base (21); the electric lunch box is characterized by further comprising an electric heating film (30), wherein a mounting groove (2213) is formed in the bottom (221) of the inner container (22), and the electric heating film (30) is fixedly arranged in the mounting groove (2213).

2. The electric lunch box according to claim 1, wherein the electric heating film (30) is fixedly arranged at the outer side of the bottom (221) of the inner container (22).

3. The electric lunch box according to claim 2, wherein the depth of the mounting groove (2213) is greater than or equal to the thickness of the electric heating film (30).

4. The electric lunch box according to claim 3, wherein a plurality of supporting protrusions (2211) are protruded from the outer side surface of the bottom (221) of the inner container (22), and the mounting slots (2213) are received in the areas surrounded by the supporting protrusions (2211).

5. The electric lunch box according to claim 2, wherein a plurality of storage compartments (2231) are formed inside the inner container (22) to be spaced apart from each other, and the electric heating film (30) is at least partially overlapped with the bottom wall (211) of each storage compartment (2231).

6. The electric lunch box according to claim 2, characterized in that the electric heating film (30) is glued to the outer side of the bottom (221) of the inner container (22).

7. The electric lunch box according to claim 1, characterized in that the electric heating film (30) further extends to the outer side of the side (222) of the inner container (22).

8. The electric lunch box according to claim 2, wherein the shape of the electric heating film (30) is adapted to the shape of the mounting groove (2213).

9. The electric lunch box according to claim 1, wherein the inner container (22) comprises a container body and a partition plate (224) connected to the inner side surface of the container body, and the container body and the partition plate (224) are integrally formed by die casting.

10. The electric lunch box according to claim 1, wherein the upper cover (10) comprises a cover body (11) and a convex edge (13) which is convexly arranged on the inner side surface of the cover body (11), the cover body (11) is clamped on the outer side surface of the inner container (22), and the convex edge (13) is abutted against the inner side surface of the inner container (22) and is hermetically connected with the inner side surface of the inner container (22).

Images