Heating and heat preservation lunch box
By using battery-powered electric heating film for heating and reflective heat insulation film for heat preservation in the lunch box, the problem of short heat preservation time in existing lunch boxes has been solved, and food can be effectively heated and kept warm during long-term transportation.
Patent Information
- Application Number
- CN202520505348.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Existing insulated lunch boxes have a short heat retention time, especially in low-temperature environments where elderly people eat slowly and the food cools down quickly, affecting the user experience.
The first and second heating films, powered by batteries, heat the food inside the lunchbox. Combined with a reflective heat-insulating film, heat loss is reduced, ensuring that the food does not cool down easily during long-term transportation.
It enables effective heating and heat preservation of food during long-term transportation, which is especially suitable for the dining needs of the elderly and extends the heat retention time of food.
Smart Images
Figure CN223886423U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lunch box technology, and in particular to a heated and insulated lunch box. Background Technology
[0002] When going to work, caring for the elderly, or visiting hospitalized patients, food needs to be brought out in lunch boxes due to time and location constraints. However, the food has already cooled down by the time it is eaten, which is why insulated lunch boxes have emerged.
[0003] Existing insulated lunch boxes are mainly made of stainless steel with a hollow double-layer structure, so they can keep food warm for a certain period of time, which limits their application range. In addition, the food cools down quickly when being eaten, which is especially problematic for the elderly, who eat slowly and take a long time to finish their meals. This is particularly true in winter when the ambient temperature is low, as the food cools down quickly, thus affecting their user experience. Utility Model Content
[0004] In order to overcome the shortcomings of the prior art, this application provides a heated and insulated lunch box.
[0005] This application provides a heated and insulated food container, which adopts the following technical solution:
[0006] A heated and insulated lunch box includes a lunch box body, a battery disposed inside the lunch box body, a first heating film disposed on the top of the battery, the first heating film being electrically connected to the battery, a heat spreader disposed on the top of the first heating film, a food storage tray disposed on the top of the heat spreader, a food sealing cover disposed on the top of the food storage tray, a second heating film embedded inside the food sealing cover, a connecting component disposed on the food sealing cover and connected to the lunch box body, the connecting component being used to electrically connect the second heating film to the battery, and a lunch box lid disposed on the top of the food sealing cover.
[0007] By adopting the above technical solution, when the user places food in the food storage tray, then places the food sealing lid on top of the food storage tray, and then places the lunch box lid on top of the lunch box body, during the transportation of the heated and insulated lunch box, the battery provides electrical energy to the first and second electric heating films. The first and second electric heating films convert electrical energy into heat. The first electric heating film heats the food storage tray, thereby heating the food, and the second electric heating film heats the top of the food, thus preventing the food from cooling down during long-term transportation.
[0008] Optionally, the connection assembly includes a mounting base and a socket. The mounting base is fixedly disposed on the top of the lunchbox body. Multiple electrode posts are arranged vertically on the mounting base. The electrode posts are electrically connected to the battery. The socket is fixedly disposed on the food sealing cover. The socket has multiple insertion holes. The multiple insertion holes are connected to the multiple electrode posts. The electrode posts are inserted into the insertion holes. Electrode plates are disposed in the insertion holes. The electrode plates are electrically connected to the second heating film.
[0009] By adopting the above technical solution, when the user places the food sealing cover on the food storage tray, the electrode post will be inserted into the socket on the socket, thereby making the motor post contact with the electrode plate, and then making the second heating film electrically connected to the battery.
[0010] Optionally, a first reflective heat insulation film is provided between the battery and the first heating film, and a second reflective heat insulation film is embedded inside the lid of the lunch box.
[0011] By adopting the above technical solution, after using the first reflective heat insulation film and the second reflective heat insulation film, the heat generated by the first electric heating film and the second electric heating film is reflected onto the food in the food storage tray, thereby reducing heat loss, saving energy, and thus playing a certain role in keeping the food warm.
[0012] Optionally, the food storage tray has multiple slots for placing food.
[0013] By adopting the above technical solution, multiple placement slots facilitate the placement of different types of food.
[0014] Optionally, the food sealing cap has an installation groove, and a sealing ring is provided in the installation groove.
[0015] By adopting the above technical solution, the sealing ring can make the connection between the food sealing lid and the food storage tray tighter, preventing food juices from spilling out during transportation.
[0016] Optionally, the food sealing lid is provided with a handle strap on the top and a groove is provided on the bottom of the food sealing lid to facilitate the placement of hands.
[0017] By adopting the above technical solution, it is easy to place your hand between the food sealing lid and the handle, then grasp the handle and move the handle away from the main body of the food container to remove the food sealing lid.
[0018] Optionally, a switch button is provided on the main body of the lunch box.
[0019] By adopting the above technical solution, the switch button is convenient for controlling the connection and disconnection of the wire between the battery and the first heating film.
[0020] Optionally, the bottom of the lunchbox body is provided with heat dissipation holes.
[0021] By adopting the above technical solution, it is easier to dissipate heat from the battery.
[0022] This utility model has the following advantages:
[0023] 1. By setting up a storage battery, a first electric heating film, a second electric heating film and connecting components, the first electric heating film heats the food storage tray, thereby heating the food, and the second electric heating film heats the top of the food, so that the food is not easily cooled during long-term transportation.
[0024] 2. By setting up a first reflective film and a second reflective film, the heat generated by the first electric heating film and the second electric heating film is reflected onto the food in the food storage tray, thereby reducing heat loss, saving energy, and thus playing a certain role in keeping the food warm.
[0025] 3. By creating multiple slots on the food storage tray, it is convenient to place different types of food in the food storage tray. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a schematic diagram of the installation structure of the food sealing cap of this utility model;
[0028] Figure 3 This is a schematic diagram of the installation structure of the second electrothermal film of this utility model;
[0029] Figure 4 This is a schematic diagram of the installation structure of the first electric heating film and the heat spreader of this utility model;
[0030] In the diagram: 1. Lunchbox body; 11. Battery; 12. First heating film; 13. Heat spreader; 14. First reflective heat insulation film; 15. Switch button; 16. Heat dissipation hole; 2. Food storage tray; 21. Placement slot; 3. Food sealing cover; 31. Second heating film; 32. Mounting slot; 33. Sealing ring; 34. Lifting belt; 35. Groove; 4. Connecting assembly; 41. Mounting base; 42. Socket; 43. Electrode post; 5. Lunchbox lid; 51. Second reflective heat insulation film. Detailed Implementation
[0031] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.
[0032] like Figures 1 to 4As shown, a heated and insulated lunch box includes a lunch box body 1. A storage battery 11 is fixedly installed inside the lunch box body 1. A first heating film 12 is installed on the top of the storage battery 11 and is electrically connected to the storage battery 11. A heat spreader 13 is installed on the top of the first heating film 12. A food storage tray 2 is installed on the top of the heat spreader 13. A food sealing cover 3 is installed on the top of the food storage tray 2. A second heating film 31 is embedded inside the food sealing cover 3. A connecting component 4 connected to the lunch box body 1 is installed on the food sealing cover 3. The connecting component 4 is used to electrically connect the second heating film 31 to the storage battery 11. A lunch box lid 5 is installed on the top of the food sealing cover 3. In this embodiment, the storage battery 11... The first heating film 12 and the second heating film 31 are both graphene flexible heating films, which are rechargeable lithium-ion batteries. Since both lithium-ion batteries and graphene flexible heating films are existing technologies, the specific composition of the lithium-ion battery and the graphene flexible heating film will not be described in detail in this embodiment. The surface of the graphene flexible heating film is made of high-molecular resin, which is soft, safe, practical, foldable, non-toxic, harmless, and environmentally friendly. It also has advantages such as high temperature resistance up to 210℃, acid and alkali resistance, IPX7 waterproof rating, V2 flame retardancy, and silent operation. The heating principle of the graphene flexible heating film is that under the action of an electric field, the carbon molecule clusters in the heating element undergo Brownian motion, and the carbon molecules generate intense friction between each other. The heat generated by friction and impact is transferred outward in the form of far-infrared radiation and convection, and the carbon molecules cause the system surface to heat up rapidly. In use, after the user places food in the food storage tray 2, the food sealing cover 3 is placed on top of the food storage tray 2. The food sealing cover 3 prevents food from spilling out of the food storage tray 2. The food sealing cover 3 is connected to the lunchbox body 1 via the connecting component 4, thereby electrically connecting the second electric heating film 31 embedded inside the food sealing cover 3 to the battery 11. Then, the lunchbox lid 5 is placed on top of the lunchbox body 1. In this embodiment, both ends of the lunchbox lid 5 are hinged with buckle plates, and the buckle plates have slots. Both ends of the lunchbox body 1 are fixedly installed with positioning... The positioning block is locked in the slot, so that the lunch box lid 5 is stably connected to the lunch box body 1, which facilitates transportation. During transportation, the battery 11 provides electrical energy to the first electric heating film 12 and the second electric heating film 31. The first electric heating film 12 and the second electric heating film 31 convert electrical energy into heat. The first electric heating film 12 heats the food storage tray 2, thereby heating the food. The second electric heating film 31 heats the top of the food, so that the food does not cool down easily during long-term transportation. When the elderly eat, the first electric heating film 12 in the lunch box body 1 will continue to heat the food, so even if the elderly eat slowly, the food in the food storage tray 2 will not cool down easily.
[0033] like Figures 1 to 4As shown, the connecting component 4 includes a mounting base 41 and a socket 42. The mounting base 41 is fixedly mounted on the top of the lunch box body 1. Multiple electrode posts 43 are mounted vertically on the mounting base 41. The electrode posts 43 are electrically connected to the storage battery 11. The socket 42 is fixedly mounted on the food sealing cover 3. The socket 42 has multiple holes, and multiple electrode posts 43 are connected to the multiple holes. The electrode posts 43 are inserted into the holes, and electrode plates are installed in the holes. The electrode plates are electrically connected to the second heating film 31. When in use, when the user places the food sealing cover 3 on the food storage tray 2, the electrode posts 43 will be inserted into the holes on the socket 42, thereby making contact between the electrode posts and the electrode plates, and thus making the second heating film 31 electrically connected to the storage battery 11, so that the second heating film 31 can generate heat.
[0034] like Figures 1 to 4 As shown, a first reflective heat insulation film 14 is installed between the battery 11 and the first electric heating film 12, and a second reflective heat insulation film 51 is embedded inside the lunch box lid 5. Since reflective heat insulation film is existing technology, the specific composition of the first reflective heat insulation film 14 and the second reflective heat insulation film 51 will not be described in detail in this embodiment. The reflective heat insulation film is an intelligent spectrally selective heat insulation film that achieves heat insulation by reflection. It uses magnetron sputtering technology to uniformly sputter precious metals such as gold, silver, titanium, nickel, and indium onto an optical-grade PET substrate to form a multi-layered and dense high-heat insulation metal film layer, which plays a long-lasting reflective heat insulation role against infrared heat in the solar spectrum. Therefore, after using the first reflective heat insulation film 14 and the second reflective heat insulation film 51, the heat generated by the first electric heating film 12 and the second electric heating film 31 is reflected onto the food in the food storage tray 2, thereby reducing heat loss, saving energy, and thus playing a certain heat preservation effect on the food.
[0035] like Figures 1 to 4 As shown, the food storage tray 2 has multiple slots 21 for placing food; multiple slots 21 make it easy to place different types of food, and prevent the soup from mixing together between different foods, causing them to have different flavors and affecting the taste of the food.
[0036] like Figures 1 to 4 As shown, the food sealing cover 3 has an installation groove 32, and a sealing ring 33 is installed in the installation groove 32. The sealing ring 33 is snapped in the installation groove 32, which facilitates the installation and removal of the sealing ring 33. The sealing ring 33 can make the connection between the food sealing cover 3 and the food storage tray 2 tighter, and prevent the food juice in the food storage tray 2 from spilling out during transportation.
[0037] like Figures 1 to 4As shown, a handle is installed on the top of the food sealing lid 3, and a groove 35 is provided at the bottom of the food sealing lid 3 to facilitate the placement of the hand. When the user needs to open the food sealing lid 3, the user puts his / her hand into the groove 35, so that the hand can be placed between the food sealing lid 3 and the handle. Then, the user holds the handle and moves the handle away from the main body of the food container 1, so that the food sealing lid 3 can be removed.
[0038] like Figures 1 to 4 As shown, a switch button 15 is installed on the main body 1 of the lunch box; the switch button 15 is used to control the connection and disconnection of the wire between the storage battery 11 and the first heating film 12, so that the user can choose whether to heat the food according to the specific situation.
[0039] like Figures 1 to 4 As shown, a heat dissipation hole 16 is provided at the bottom of the lunch box body 1; by providing a heat dissipation hole 16 at the bottom of the lunch box body 1, the battery 11 can dissipate heat.
[0040] The implementation principle of this embodiment is as follows: After the user places the food in the food storage tray 2, the food sealing cover 3 is placed on top of the food storage tray 2, and then the lunch box cover 5 is placed on top of the lunch box body 1. During the transportation of the heated and insulated lunch box, the battery 11 provides electrical energy to the first heating film 12 and the second heating film 31. The first heating film 12 and the second heating film 31 convert electrical energy into heat. The first heating film 12 heats the food storage tray 2, thereby heating the food, and the second heating film 31 heats the top of the food, so that the food is not easily cooled during long-term transportation.
[0041] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.
Claims
1. A heated and insulated lunch box, characterized in that: The lunch box includes a main body (1), inside which a storage battery (11) is installed. A first heating film (12) is installed on the top of the storage battery (11). The first heating film (12) is electrically connected to the storage battery (11). A heat spreader (13) is installed on the top of the first heating film (12). A food storage tray (2) is installed on the top of the heat spreader (13). A food sealing cover (3) is installed on the top of the food storage tray (2). A second heating film (31) is embedded inside the food sealing cover (3). A connecting component (4) connected to the lunch box main body (1) is provided on the food sealing cover (3). The connecting component (4) is used to electrically connect the second heating film (31) to the storage battery (11). A lunch box lid (5) is installed on the top of the food sealing cover (3).
2. The heated and insulated lunch box according to claim 1, characterized in that: The connecting component (4) includes a mounting base (41) and a socket (42). The mounting base (41) is fixedly mounted on the top of the lunch box body (1). Multiple electrode posts (43) are arranged vertically on the mounting base (41). The electrode posts (43) are electrically connected to the storage battery (11). The socket (42) is fixedly mounted on the food sealing cover (3). Multiple insertion holes are provided on the socket (42). Multiple insertion holes are connected to multiple electrode posts (43). The electrode posts (43) are inserted into the insertion holes. Electrode plates are provided in the insertion holes. The electrode plates are electrically connected to the second heating film (31).
3. A heated and insulated lunch box according to claim 1, characterized in that... A first reflective heat insulation film (14) is provided between the battery (11) and the first heating film (12), and a second reflective heat insulation film (51) is embedded inside the lunch box cover (5).
4. A heated and insulated lunch box according to claim 1, characterized in that: The food storage tray (2) has multiple slots (21) for placing food.
5. A heated and insulated lunch box according to claim 1, characterized in that: The food sealing cap (3) has an installation groove (32) and a sealing ring (33) is provided in the installation groove (32).
6. A heated and insulated lunch box according to claim 5, characterized in that: The food sealing cap (3) is provided with a handle strap at the top and a groove (35) is provided at the bottom of the food sealing cap (3) to facilitate the placement of hands.
7. A heated and insulated lunch box according to claim 1, characterized in that: The main body (1) of the lunch box is equipped with a switch button (15).
8. A heated and insulated lunch box according to claim 7, characterized in that: The bottom of the main body (1) of the lunch box has heat dissipation holes (16).