Electric heating lunch box with vacuum function

Abstract

The utility model provides a kind of electric heating lunch box with vacuum function, including shell, upper cover, vacuumizing box, inner bag, the heating sheet film of adhering in the outside of inner bag, control circuit electrically connected with heating sheet film;Upper cover is provided with exhaust hole, detachable sealing silica gel plug is set on exhaust hole, sealing silica gel plug is used to seal exhaust hole;Vacuumizing box is detachably set on upper cover, the exhaust end of vacuumizing box is opposite to exhaust hole, vacuumizing box is used to vacuumize in inner bag through exhaust hole, the exhaust end of vacuumizing box can accommodate sealing silica gel plug located on exhaust hole.The electric heating lunch box with vacuum function of the utility model has the function of heating and vacuumizing preservation simultaneously, the exhaust end of vacuumizing box can accommodate sealing silica gel plug located on exhaust hole, and vacuumizing box is conveniently stored or carried with electric heating lunch box.

Description

Technical Field

[0001] This utility model relates to the technical field of lunch boxes, and more specifically to an electric lunch box with vacuum function. Background Technology

[0002] More and more people prefer to bring their own prepared meals to work or travel, as it's both safe and healthy. As a result, portable lunchboxes with heating functions have appeared on the market. However, ordinary heated lunchboxes are prone to bacterial growth during use, especially since food is rich in nutrients such as starch and protein. Prolonged storage can lead to the proliferation of bacteria, mold, and other microorganisms, causing the food to spoil. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an electric lunch box with vacuum function, which can both heat food and inhibit the growth of bacteria and other microorganisms, so that the food in the lunch box can be kept fresh for a long time.

[0004] The technical solution of this utility model is to provide an electric lunch box with vacuum function, including a shell, a top cover, a vacuum box, an inner liner, a heating element film attached to the outside of the inner liner, and a control circuit electrically connected to the heating element film; the top cover is provided with an exhaust hole, and a removable sealing silicone plug is provided on the exhaust hole to seal the exhaust hole; the vacuum box is detachably mounted on the top cover, the vacuuming end of the vacuum box is opposite to the exhaust hole, the vacuum box is used to evacuate the inner liner through the exhaust hole, and the vacuuming end of the vacuum box can accommodate the sealing silicone plug located on the exhaust hole.

[0005] Compared with existing technologies, the electric lunch box with vacuum function of this utility model has the following advantages: The electric lunch box with vacuum function of this utility model has the functions of heating, heat preservation, vacuuming and freshness preservation. When heating and vacuuming are not needed, the sealing silicone plug is placed on the vent hole, and the vacuum box covers the sealing silicone plug and connects with the vent hole, making it convenient to store or carry the sealing silicone plug and the vacuum box together with the electric lunch box; when heating, the vacuum box can be removed and the sealing silicone plug can be pulled out to allow air to pass through, and then the heating element membrane can be energized to heat the inner pot; when vacuuming, the sealing silicone plug can be pulled out first, and then the vacuum box can be installed so that the air extraction end of the vacuum box is connected to the vent hole, thereby creating a vacuum inside the inner pot, creating an oxygen-deficient environment inside the inner pot, inhibiting bacterial growth, and keeping the food in the lunch box fresh for a long time.

[0006] Preferably, the vacuum chamber contains a vacuum pump and a battery, and a microswitch is installed on the vacuum chamber. The vacuum pump is electrically connected to the battery via the microswitch, which controls the start and stop of the vacuum pump. With this structure, the vacuum chamber is wireless, requiring no external power supply, making it convenient to use anytime, anywhere. The microswitch facilitates operation of the vacuum chamber for vacuuming.

[0007] Preferably, the vacuum pump housing is equipped with an indicator light, which is electrically connected to the battery via a microswitch to indicate the on / off status of the vacuum pump. This structure, with the indicator light, facilitates monitoring the on / off status of the vacuum pump and also aids in troubleshooting.

[0008] Preferably, the heating element film is a one-piece structure, including a bottom heating element and several side heating elements. A connecting piece is provided between the bottom heating element and each side heating element. The side heating elements are not connected to each other. Each side heating element can be bent to stand upright above the bottom heating element by the corresponding connecting piece. The inner liner has several sides and a bottom surface. The bottom heating element is attached to the bottom surface of the inner liner, and the side heating elements are attached to the sides of the inner liner one by one. This structure features a bottom heating element that adheres to the bottom surface of the inner pot, allowing heat to rise from the bottom. The side heating elements are correspondingly attached to the sides of the inner pot, creating a circumferential heating effect. This increases the heating area, allowing heat to radiate synchronously from all sides to the center, shortening the heat conduction path, reducing localized temperature differences in the food, and achieving rapid and uniform heating. The heating element membrane is a single piece, with each side heating element connected to the bottom heating element via corresponding connecting pieces. This facilitates the overall manufacturing of the heating element membrane. Changing the bending angle of the connecting pieces allows for better adhesion between the side and bottom heating elements and the inner pot, and also ensures compatibility with various types of inner pots.

[0009] Preferably, the heating element membrane has an adhesive layer for attaching and bonding the heating element membrane to the inner liner. This structure facilitates the assembly of the heating element membrane and the inner liner. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the electric lunch box with vacuum function according to this utility model.

[0011] Figure 2 This is an exploded view of the electric lunch box with vacuum function according to this utility model.

[0012] Figure 3 This is a cross-sectional view of the electric lunch box with vacuum function according to this utility model.

[0013] As shown in the figure: 1. Shell, 2. Inner liner, 3. Top cover, 3-1. Vent, 4. Heating element membrane, 4-1. Bottom heating element, 4-2. Side heating element, 4-3. Connecting piece, 5. Sealing silicone plug, 6. Wireless vacuum box, 6-1. Vacuum end, 7. Micro switch, 8. Indicator light. Detailed Implementation

[0014] 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.

[0015] 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.

[0016] 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.

[0017] like Figures 1 to 3 As shown, the electric lunch box with vacuum function of this utility model includes a shell 1, a top cover 3, a vacuum box 6, an inner liner 2, and a heating element membrane 4. The inner liner 2 is disposed inside the shell 1, and the heating element membrane 4 is attached to the outside of the inner liner. A control circuit (not shown) is electrically connected to the heating element membrane 4. The shell 1 is also provided with a control circuit (not shown) electrically connected to the heating element membrane 4. The top cover 3 is used to cover the shell 1.

[0018] The upper cover 3 is provided with an exhaust hole 3-1, and a removable 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. The vacuum box 6 is detachably installed on the upper cover 3. The vacuum end 6-1 of the vacuum box 6 is connected to the exhaust hole 3-1. The vacuum box 6 is used to evacuate the inner liner 2 through the exhaust hole 3-1. The vacuum end of the vacuum box 6 can accommodate the sealing silicone plug 5 located on the exhaust hole 3-1, that is, the vacuum end of the vacuum box 6 is covered by the sealing silicone plug 5.

[0019] The vacuum box 6 is equipped with a vacuum pump and a battery. The vacuum box 6 is equipped with a micro switch 7 and an indicator light 8. The vacuum pump and the indicator light 8 are both electrically connected to the battery through the micro switch 7. The micro switch 7 is used to control the start and stop of the vacuum pump, and the indicator light 8 is used to indicate the power on and off status of the vacuum pump.

[0020] In this embodiment, the heating element film 4 is a one-piece structure, comprising a bottom heating element 4-1 and four side heating elements 4-2. Connecting pieces 4-3 are provided between the bottom heating element 4-1 and each side heating element 4-2. The side heating elements 4-2 are not connected to each other, and each side heating element 4-2 can be bent to stand upright above the bottom heating element 4-1 by bending the corresponding connecting piece 4-3. The inner liner 2 has four sides and a bottom surface. The bottom heating element 4-1 is attached to the bottom surface of the inner liner 2, and the side heating elements 4-2 are attached to the sides of the inner liner 2 respectively. Simultaneously, an adhesive layer is provided on the heating element film 4, which is used to adhere and bond the heating element film 4 to the inner liner 2.

[0021] This utility model's electric lunch box with vacuum function simultaneously possesses heating, heat preservation, and vacuum preservation functions. When heating and vacuuming are not required, the sealing silicone plug 5 is placed over the vent 3-1 to isolate the inner liner from the outside. The vacuum box 6 covers the sealing silicone plug 5 and connects to the vent 3-1, making it convenient for the sealing silicone plug 5 and the vacuum box 6 to be stored or carried together with the electric lunch box.

[0022] When heating is required, the vacuum box 6 can be removed and the sealing silicone plug 5 pulled out to allow air to circulate inside and outside the inner pot. Then, the heating element 4 can be powered on to heat the inner pot. The bottom heating element 4-1 is attached to the bottom surface of the inner pot 2 to generate heat, allowing heat to be transferred upwards from the bottom of the inner pot. The side heating elements 4-2 are attached to the sides of the inner pot 2 respectively to generate heat, forming a ring-shaped heating effect around the inner pot. This increases the heating area, allowing heat to radiate synchronously from all sides of the inner pot to the center, shortening the heat conduction path, reducing the local temperature difference of the food in the inner pot, and achieving a rapid and uniform heating effect.

[0023] When vacuum preservation is required, first remove the sealing silicone plug 5, then install the vacuum box 6, connect the vacuum end of the vacuum box 6 to the exhaust port 3-1, and then press the micro switch 7 to vacuum the inner liner 2, creating an oxygen-deficient environment inside the inner liner 2, inhibiting bacterial growth, and keeping the food in the lunch box fresh for a long time.

[0024] 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. An electric lunch box with vacuum function, characterized in that, The device includes a shell (1), a top cover (3), a vacuum box (6), an inner liner (2), a heating element film (4) attached to the outside of the inner liner, and a control circuit electrically connected to the heating element film (4). The top cover (3) is provided with an exhaust hole (3-1), and a removable 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). The vacuum box (6) is detachably mounted on the top cover (3). The vacuum end of the vacuum box (6) is opposite to the exhaust hole (3-1). The vacuum box (6) is used to evacuate the inner liner (2) through the exhaust hole (3-1). The vacuum end of the vacuum box (6) can accommodate the sealing silicone plug (5) located on the exhaust hole (3-1).

2. The electric lunch box with vacuum function according to claim 1, characterized in that, The vacuum box (6) is equipped with a vacuum pump and a battery. A micro switch (7) is installed on the vacuum box (6). The vacuum pump is electrically connected to the battery through the micro switch (7). The micro switch (7) is used to control the start and stop of the vacuum pump.

3. The electric lunch box with vacuum function according to claim 2, characterized in that, The vacuum box (6) is equipped with an indicator light (8), which is electrically connected to the battery via a micro switch (7) to indicate the power-on / off status of the vacuum pump.

4. The electric lunch box with vacuum function according to claim 1, characterized in that, The heating element membrane (4) is a one-piece structure, including a bottom heating element (4-1) and several side heating elements (4-2). A connecting piece (4-3) is provided between the bottom heating element (4-1) and each side heating element (4-2). The side heating elements (4-2) are not connected to each other. Each side heating element (4-2) can be bent to stand on its side above the bottom heating element (4-1) by the corresponding connecting piece (4-3). The inner liner (2) is provided with several sides and a bottom surface. The bottom heating element (4-1) is attached to the bottom surface of the inner liner (2), and the side heating elements (4-2) are attached to the sides of the inner liner (2) one by one.

5. The electric lunch box with vacuum function according to claim 1, characterized in that, An adhesive layer is provided on the heating element membrane (4), which is used to attach and stick the heating element membrane (4) to the inner liner (2).

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