Battery type heat preservation equipment

Abstract

The utility model relates to the technical field of catering, and discloses a battery type heat preservation device which comprises a meal box, a plurality of heat preservation grooves are clamped in the middle of the inner wall of the meal box, a liquid cooling plate is fixedly connected to the bottom of the outer wall of the meal box, a shell is fixedly connected to the periphery of the outer wall of the liquid cooling plate, and a power source is fixedly connected to one side of the inner wall of the shell. A wire is fixedly connected to the other side of the outer wall of the power source, a heating resistance wire is fixedly connected to one end of the wire, a heat insulation plate is fixedly connected to the bottom of the outer wall of the heating resistance wire, and a display screen is fixedly connected to the top of the outer wall of the power source. In the utility model, the power supply supplies power to the equipment, after the equipment is started, current is transmitted to the heating resistance wire through the wire to generate heat to heat food in the meal box, the display screen displays temperature information, a user can adjust the working state of the heating resistance wire to meet the heat preservation requirements of different food, and meanwhile, the food is heated more uniformly and has no peculiar smell.

Description

Technical Field

[0001] This utility model relates to the field of catering technology, and in particular to a battery-powered heat preservation device. Background Technology

[0002] Battery-powered heat preservation equipment is a device that uses batteries as its energy source and employs specific heating elements and insulation structures to heat and maintain the temperature of objects or spaces that require insulation. In the catering industry, small-scale liquefied petroleum gas heating is commonly used to maintain the temperature of dishes. However, these methods have limitations. With increasing environmental awareness and rising energy costs, the market urgently needs safer, more environmentally friendly, and more efficient heat preservation technologies.

[0003] A search revealed Chinese patent publication number CN114056776A, which discloses an insulated and environmentally friendly lunch box. Made of environmentally friendly materials, it includes a box body, an inner box, and a top lid. The inner box is placed inside the box body, and the top lid is placed on top of the box body. There are interlayer spaces between the inner box and the box body, and between the inner box and the top lid, completely surrounding the inner box. This design reduces heat loss when food is placed inside the inner box, thus keeping the lunch box warm. However, existing battery-powered insulated devices, such as traditional liquefied gas cylinder heating, are costly and environmentally unfriendly, and leaks can cause explosions, posing safety risks to users. Concentrated flame heating leads to uneven food processing, candles burn slowly and have unstable flames, resulting in low heat production per unit time and rapid heat dissipation, leading to low efficiency. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a battery-powered heat preservation device, which aims to improve the problems of high heating costs and environmental unfriendliness in the existing technology, easy leakage and explosion that are unsafe for users, uneven food processing caused by concentrated flame heating, low heat production per unit time, and low efficiency due to rapid heat dissipation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a battery-powered heat preservation device, comprising a lunch box, wherein multiple heat preservation grooves are provided in the middle of the inner wall of the lunch box, a liquid cooling plate is fixedly connected to the bottom of the outer wall of the lunch box, an outer shell is fixedly connected to the outer wall of the liquid cooling plate, a power source is fixedly connected to one side of the inner wall of the outer shell, a wire is fixedly connected to the other side of the outer wall of the power source, a heating resistance wire is fixedly connected to one end of the wire, a heat insulation plate is fixedly connected to the bottom of the outer wall of the heating resistance wire, a display screen is fixedly connected to the top of the outer wall of the power source, a control switch is installed on the rear side of the outer wall of the outer shell, a base plate is fixedly connected to the bottom of the outer wall of the lunch box, a charging hole is provided on the rear side of the outer wall of the lunch box, and a fixing mechanism is fixedly connected to the rear side of the inner wall of the lunch box, the fixing mechanism being used to fix and hold the tableware.

[0006] The above technical solution utilizes a power supply device that, when turned on, draws current through wires to heat the resistance wire, generating heat to keep the food inside the food container warm. An insulation plate prevents heat loss, improving insulation efficiency. A display screen shows the temperature, and users can adjust the resistance wire to control the temperature, meeting the insulation needs of different foods. A liquid cooling plate dissipates heat, protecting the battery components and ensuring the device's stability and safety. A charging port charges the power supply, ensuring continuous operation. An external charging port on the rear of the food container's outer wall allows connection to a charging device to power the battery-powered insulation device and maintain its insulation function. A fixing mechanism on the rear of the inner wall secures the tableware, preventing shaking and collisions and ensuring stable tableware positioning.

[0007] As a further description of the above technical solution:

[0008] The fixing mechanism includes a fixing block, which is fixedly connected to the rear side of the inner wall of the lunch box. Multiple rotating shafts are fixedly connected to the middle of the inner wall of the fixing block. A clamping block is rotatably connected to the middle of the outer wall of the rotating shaft. A pulley is rotatably connected to the top of the outer wall of the clamping block. A corrective spring is fixedly connected to the side of the outer wall of the clamping block away from the other end. The other end of the corrective spring is fixedly connected to the top of the outer wall of the fixing block. A slider is slidably connected to the middle of the inner wall of the fixing block. The slider is located on the side adjacent to the inner wall of the clamping block. An anti-slip pad is fixedly connected to the top of the outer wall of the slider.

[0009] The above technical solution allows the corrective spring to remain pre-tight when there is no object, causing the clamping block to open and the slider to be located in the center of the fixed block. When the water cup is placed, the bottom of the slider is pressed down, and the slider pushes the clamping block to rotate around the axis. The clamping block clamps the water cup, and the anti-slip pad increases friction and improves the fixing effect. When the water cup is removed, the spring releases energy, the clamping block rotates outward, and the slider returns to its original position, ready for the next use.

[0010] As a further description of the above technical solution:

[0011] A bolt is fixedly connected to the middle of the inner wall of the base plate, and an exhaust plate is threaded around the outer wall of the bolt.

[0012] The above technical solution involves bolting and fixing the exhaust plate to the middle of the inner wall of the base plate. The adjusting bolts can control the tightness of the exhaust plate. When the air pressure inside the food container changes, the exhaust plate balances the air pressure and prevents heat accumulation, prevents foreign objects from entering, maintains a stable internal environment, and ensures heat preservation and safe use.

[0013] As a further description of the above technical solution:

[0014] The bottom of the base plate is threaded with screws at the four corners, and foot pads are fixedly connected to the bottom of the outer wall of each screw.

[0015] The above technical solution involves connecting the four corners of the base plate with screws, which can be flexibly adjusted to adapt to different placement surfaces, ensuring that the lunch box is placed stably.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the outer shell has grooves on the left and right sides, and a folding frame is rotatably connected to the middle of the inner wall of the groove.

[0018] Through the above technical solution: the left and right side grooves of the outer shell provide installation space for the folding frame, so that it can be stored in the groove when not in use, saving space. When in use, the folding frame can be rotated and unfolded to support the equipment or assist in handling, thereby improving the functionality and convenience of the equipment.

[0019] As a further description of the above technical solution:

[0020] A handle is rotatably connected to one side of the outer wall of the folding frame, and an anti-slip sleeve is fixedly connected to the middle of the outer wall of the handle.

[0021] The above technical solution allows the folding frame to be unfolded and folded by rotating the handle, making it easy to operate. The anti-slip sleeve on the handle increases friction and prevents slippage.

[0022] As a further description of the above technical solution:

[0023] A fixing buckle is fixedly connected to the middle of the inner wall of the lunch box, and a spring plate is fixedly connected to the top of the outer wall of the fixing buckle.

[0024] The above technical solution uses a fixing buckle in the middle of the inner wall of the lunchbox to secure the items, and a spring plate at the top that deforms elastically to ensure that the items are securely clamped.

[0025] As a further description of the above technical solution:

[0026] A fixing strip is fixedly connected to the bottom of the outer wall of the spring plate, and a sealing strip is fixedly connected to the top of the outer wall of the base plate.

[0027] The above technical solution involves the bottom fixing strip applying pressure to securely hold the item, while the sealing strip at the top of the base plate fills the gaps when the food container is closed, ensuring a seal, preventing heat and liquid loss, and maintaining a stable internal environment.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the power supply provides power to the device. After the device is turned on, the current is transmitted to the heating resistance wire through the wire, generating heat to heat the food in the food container and achieve heat preservation. The heat insulation plate prevents heat loss and improves heat preservation efficiency. The display screen shows temperature information, and the user can adjust the working status of the heating resistance wire to meet the heat preservation needs of different foods. The liquid cooling plate dissipates heat and protects components such as the battery, ensuring the stability and safety of the device. The power supply is charged through the charging port, which has high power supply efficiency and can save a lot of costs. It eliminates the need for disposable gas canisters and candles, making it more environmentally friendly and environmentally friendly. The heating is more even, and the safety is guaranteed. At the same time, the food is heated more evenly and there is no odor in the food.

[0030] 2. In this utility model, when no item is being held, the corrective spring remains in a contracted state, keeping the clamping block at an open angle. The slider is stable in the middle of the inner wall of the fixed block. The anti-slip pad cooperates with the clamping block to maintain the initial shape. After the water cup is placed, its bottom contacts the slider, and pressure is applied to make it slide down the inner wall. The slider and the clamping block come into contact and generate an interaction force, pushing the clamping block to rotate around the axis. The pulley reduces friction, making the clamping action smooth. The clamping block rotates and stretches the spring, storing elastic potential energy and reacting it on the clamping block, causing it to rotate inward to clamp the water cup. The anti-slip pad increases friction and prevents slippage. Attached Figure Description

[0031] Figure 1 This is a perspective view of a battery-powered heat preservation device proposed in this utility model;

[0032] Figure 2 This is a top view of a battery-powered heat preservation device proposed in this utility model;

[0033] Figure 3 This is a structural exploded view of a battery-type heat preservation device proposed in this utility model;

[0034] Figure 4 This is a partial structural exploded view of a battery-type heat preservation device proposed in this utility model;

[0035] Figure 5 This is an exploded view of the fixing mechanism of a battery-type heat preservation device proposed in this utility model.

[0036] Legend:

[0037] 1. Lunch box; 2. Fixing mechanism; 201. Fixing block; 202. Rotating shaft; 203. Clamping block; 204. Pulley; 205. Correcting spring; 206. Slider; 207. Anti-slip mat; 3. Insulation tank; 4. Liquid cooling plate; 5. Outer shell; 6. Power supply; 7. Wire; 8. Heating resistance wire; 9. Heat insulation plate; 10. Display screen; 11. Control switch; 12. Base plate; 13. Charging port; 14. Exhaust plate; 15. Bolt; 16. Screw; 17. Foot pad; 18. Folding frame; 19. Groove; 20. Handle; 21. Anti-slip sleeve; 22. Fixing buckle; 23. Spring plate; 24. Fixing strip; 25. Sealing strip. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1 , Figure 3 and Figure 4 An embodiment of this utility model provides a battery-powered heat preservation device, including a lunch box 1. Multiple heat preservation grooves 3 are fitted into the middle of the inner wall of the lunch box 1. A liquid cooling plate 4 is fixedly connected to the bottom of the outer wall of the lunch box 1. A shell 5 is fixedly connected to the outer perimeter of the liquid cooling plate 4. A power supply 6 is fixedly connected to one side of the inner wall of the shell 5. A wire 7 is fixedly connected to the other side of the outer wall of the power supply 6. A heating resistance wire 8 is fixedly connected to one end of the wire 7. A heat insulation plate 9 is fixedly connected to the bottom of the outer wall of the heating resistance wire 8. A display screen 10 is fixedly connected to the top of the outer wall of the power supply 6. A control switch 11 is installed on the rear side of the outer wall of the shell 5. A base plate 12 is fixedly connected to the bottom of the outer wall of the lunch box 1. A charging hole 13 is opened on the rear side of the outer wall of the lunch box 1. A fixing mechanism 2 is fixedly connected to the rear side of the inner wall of the lunch box 1. The fixing mechanism 2 is used to fix and hold tableware. A bolt 15 is fixedly connected to the middle of the inner wall of the base plate 12. An exhaust plate 14 is threadedly connected to the outer perimeter of the bolt 15.

[0040] Specifically, power supply 6 supplies power to the device. After the device is turned on, current is transmitted through wire 7 to heating resistance wire 8, generating heat to heat the food inside the food container 1, thus achieving heat preservation. Insulation plate 9 prevents heat loss and improves heat preservation efficiency. Display screen 10 displays temperature information. Users can adjust the working status of heating resistance wire 8 to precisely control the temperature inside the food container 1 to meet the heat preservation needs of different foods. Liquid cooling plate 4 dissipates heat and protects components such as the battery, ensuring the stability and safety of the device. Charging port 13 can charge power supply 6 to ensure continuous operation of the device. The charging port 13 on the rear side of the outer wall of food container 1 can be connected to an external charging device to charge the battery inside food container 1. The insulated equipment is powered to ensure normal operation and maintain its heat preservation function. The fixing mechanism 2 on the rear side of the inner wall of the lunch box 1 secures the tableware, preventing it from shaking or colliding inside the lunch box 1 and ensuring its stability during transportation. The bolts 15 in the middle of the inner wall of the bottom plate 12 are used to connect and fix the exhaust plate 14. The tightness of the exhaust plate 14 can be adjusted by turning the bolts 15. When the air pressure inside the lunch box 1 changes due to heating or other reasons, the exhaust plate 14 balances the air pressure, prevents heat accumulation, and prevents foreign objects from entering the lunch box 1, maintaining a stable environment inside the lunch box 1 and ensuring the heat preservation effect and safety of use.

[0041] Reference Figure 1 , Figure 2 and Figure 5 The fixing mechanism 2 includes a fixing block 201, which is fixedly connected to the rear side of the inner wall of the lunch box 1. Multiple rotating shafts 202 are fixedly connected to the middle of the inner wall of the fixing block 201. A clamping block 203 is rotatably connected to the middle of the outer wall of the rotating shaft 202. A pulley 204 is rotatably connected to the top of the outer wall of the clamping block 203. A corrective spring 205 is fixedly connected to the side of the outer wall of the clamping block 203 away from it. The other end of the corrective spring 205 is fixedly connected to the top of the outer wall of the fixing block 201. A slider 206 is slidably connected to the middle of the inner wall of the fixing block 201. The slider 206 is located on the side adjacent to the inner wall of the clamping block 203. An anti-slip pad 207 is fixedly connected to the top of the outer wall of the slider 206. Screws 16 are threadedly connected to the four corners of the bottom of the base plate 12. Foot pads 17 are fixedly connected to the bottom of the outer wall of each screw 16. Grooves 19 are opened on the left and right sides of the outer wall of the outer shell 5. A folding frame 18 is rotatably connected to the middle of the inner wall of the groove 19.

[0042] Specifically, when no cup is placed, the corrective spring 205 is in a natural or pre-tightened state, keeping the four clamping blocks 203 open. The slider 206 is stable in the middle of the inner wall of the fixed block 201. The anti-slip pad 207 helps maintain the initial state of the mechanism. When the cup is placed, its bottom presses down on the slider 206, causing the slider 206 to slide down along the inner wall of the fixed block 201. During the slide, the slider 206 pushes the clamping block 203. Due to the connection of the pivot 202, the clamping block 203 rotates around the pivot. The pulley 204 reduces rotational friction. The rotation of the clamping block 203 stretches the corrective spring 205. The spring stores elastic potential energy, and its contraction force causes the clamping block 203 to rotate inward to clamp the cup. At this time, the anti-slip pad 207 adheres to the outer wall of the cup to increase friction and improve the fixing effect. When the cup is removed, the pressure disappears, and the corrective spring 205... 05 Releases elastic potential energy, pushing the clamping block 203 to rotate outward. The slider 206 slides upward and resets under the action of the spring and its own gravity, ready to fix the water cup next time. The four corners of the bottom of the base plate 12 are connected by screws 16 through threads. The screws 16 can be flexibly turned according to the actual situation of the placement surface to adjust the level of the base plate 12 and ensure that the lunch box 1 is placed stably. The foot pads 17 fixed at the bottom of the screws 16 can increase the friction with the placement surface and prevent the equipment from sliding. The grooves 19 on the left and right sides of the outer wall of the outer shell 5 provide installation space for the folding frame 18. The folding frame 18 is rotatably connected in the middle of the inner wall of the groove 19. When not in use, it can be stored in the groove 19 to save space. When needed, it can be rotated and unfolded to support the equipment or assist in handling, etc., enhancing the functionality and convenience of the equipment.

[0043] Reference Figure 1 , Figure 2 and Figure 3 A handle 20 is rotatably connected to one side of the outer wall of the folding frame 18. An anti-slip sleeve 21 is fixedly connected to the middle of the outer wall of the handle 20. A fixing buckle 22 is fixedly connected to the middle of the inner wall of the lunch box 1. A spring plate 23 is fixedly connected to the top of the outer wall of the fixing buckle 22. A fixing strip 24 is fixedly connected to the bottom of the outer wall of the spring plate 23. A sealing strip 25 is fixedly connected to the top of the outer wall of the base plate 12.

[0044] Specifically, the folding frame 18 can be unfolded and folded by rotating. The handle 20 connected to one side of its outer wall is easy for the user to hold and control the state of the folding frame 18. The anti-slip sleeve 21 on the handle 20 increases the friction and prevents it from slipping when held. The fixing buckle 22 in the middle of the inner wall of the lunch box 1 is used to fix the items. When an item is placed, the spring plate 23 connected to its top can generate elastic deformation. The fixing strip 24 connected to the bottom applies pressure to the item to achieve a stable clamping. The sealing strip 25 on the top of the outer wall of the bottom plate 12 mainly fills the gap when the lunch box 1 is closed, plays a sealing role, prevents heat loss, liquid leakage, etc., and maintains the stability of the internal environment of the lunch box 1.

[0045] Working Principle: Power supply 6 provides power to the entire device, supplying energy to the heating element, control circuit, and display component. The battery component uses a rechargeable lithium battery. When the device is turned on via control switch 11, current is transmitted to the heating resistance wire 8 through wire 7. The heating element converts electrical energy into heat energy, providing uniform heating for the food. The heating resistance wire 8 generates heat after being energized, which is used to heat the food inside the food container 1, achieving a heat preservation function. At the same time, the heat insulation plate 9 prevents heat loss downwards, reducing heat loss and improving heat preservation efficiency, ensuring that heat is mainly concentrated inside the food container 1 to maintain the food temperature. The display screen 10 displays relevant information such as the temperature inside the food container 1. The display component uses an LED display screen 10, allowing users to visually control the temperature at any time based on the temperature data displayed on the screen. The control circuit is connected to the display component, allowing diners to adjust the temperature visually at any time via the control circuit. The working state of the heating resistance wire 8 is adjusted via control switch 11. The control circuit uses a microprocessor control module to achieve... Precise temperature control within the food container 1 is achieved to meet the heat preservation requirements of different foods. The liquid cooling plate 4 can dissipate heat during the operation of the equipment, preventing the outer wall temperature of the food container 1 from becoming too high. It can also prevent damage to the power supply 6 components due to excessive temperature, ensuring the stability and safety of the equipment. The power supply 6 can be charged through the charging hole 13 on the rear side of the outer wall of the food container 1, so that it can provide power to the equipment when needed, ensuring that the equipment can work continuously. The battery assembly is installed into the heat preservation equipment, the food is placed in and ensured to be in contact with the heating element, the desired temperature is set and the equipment is started. The temperature changes are observed and adjusted to maintain the optimal temperature of the food. The food is heated by the heating element, which is odorless and heats evenly, safely and reliably. A heat insulation component is provided between the liquid cooling plate 4 and the outer shell 5, located on the side of the temperature sensing plug-in part near the battery mounting cavity. The open end of the outer shell 5 has a mounting groove 19. The heat insulation component is installed in the groove 19 and filled with heat insulation material, which can insulate and retard flames, preventing the flames from spreading to the temperature sensing plug-in part when the battery thermal runaway occurs, ensuring the safety of the temperature sensing element.

[0046] When no object is placed, the corrective spring 205 is under a certain preload, maintaining a certain opening angle between the four clamping blocks 203. At this time, the slider 206 is in the middle of the inner wall of the fixed block 201, and its position is relatively stable. The anti-slip pad 207 cooperates with the clamping block 203 to maintain the initial shape of the mechanism. When the water cup is placed in the fixed mechanism 2, the bottom of the water cup will contact the slider 206 and apply downward pressure to the slider 206. Since the slider 206 is slidably connected in the middle of the inner wall of the fixed block 201, therefore... Under the pressure of the water cup, the slider 206 slides downward along the inner wall of the fixed block 201. During this downward sliding process, the slider 206 contacts the adjacent side of the inner wall of the clamping block 203 and generates an interaction force. Since the rotating shaft 202 rotates the clamping block 203 onto the fixed block 201, when the slider 206 moves downward and pushes the clamping block 203, the clamping block 203 will rotate around the rotating shaft 202. At this time, the pulley 204 can reduce the friction with the outer wall of the water cup during the rotation of the clamping block 203, making the clamping action more efficient. As the clamping block 203 rotates, the outer wall of the clamping block 203 moves away from the side that stretches the corrective spring 205. The corrective spring 205, under tension, undergoes elastic deformation, storing elastic potential energy. Simultaneously, the contraction force of the corrective spring 205 reacts to the clamping block 203, allowing all four clamping blocks 203 to rotate inward, thus clamping the water cup. When the clamping block 203 rotates inward and contacts the outer wall of the water cup, the anti-slip pad 207 on the top of the slider 206 will fit tightly against the outer wall of the water cup. The surface of the anti-slip pad 207... The surface can increase the friction between the cup and the outer wall of the cup, preventing the cup from sliding during clamping and further improving the fixing effect. When the cup needs to be removed, lift the cup upwards, and the pressure of the cup on the slider 206 disappears. At this time, the corrective spring 205, due to the stored elastic potential energy, will return to its original state, release the elastic potential energy, and push the clamping block 203 to rotate outwards. The slider 206 will also slide upwards under the action of the corrective spring 205 and its own weight, returning to the initial position, waiting for the next fixation of the cup.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery-powered heat preservation device, comprising a lunchbox (1), characterized in that: The inner wall of the lunch box (1) is provided with multiple heat preservation grooves (3). The bottom of the outer wall of the lunch box (1) is fixedly connected to a liquid cooling plate (4). The outer wall of the liquid cooling plate (4) is fixedly connected to a shell (5). The inner wall of the shell (5) is fixedly connected to a power supply (6). The outer wall of the power supply (6) is fixedly connected to a wire (7). One end of the wire (7) is fixedly connected to a heating resistance wire (8). The bottom of the outer wall of the heating resistance wire (8) is fixedly connected to a heat insulation plate (9). The top of the outer wall of the power supply (6) is fixedly connected to a display screen (10). A control switch (11) is installed on the rear side of the outer wall of the shell (5). The bottom of the outer wall of the lunch box (1) is fixedly connected to a base plate (12). A charging hole (13) is opened on the rear side of the outer wall of the lunch box (1). A fixing mechanism (2) is fixedly connected to the rear side of the inner wall of the lunch box (1). The fixing mechanism (2) is used to fix and fit the tableware.

2. The battery-powered heat preservation device according to claim 1, characterized in that: The fixing mechanism (2) includes a fixing block (201), which is fixedly connected to the rear side of the inner wall of the lunch box (1). Multiple rotating shafts (202) are fixedly connected to the middle of the inner wall of the fixing block (201). A clamping block (203) is rotatably connected to the middle of the outer wall of the rotating shaft (202). A pulley (204) is rotatably connected to the top of the outer wall of the clamping block (203). A corrective spring (205) is fixedly connected to the side of the outer wall of the clamping block (203) away from the other side. The other end of the corrective spring (205) is fixedly connected to the top of the outer wall of the fixing block (201). A slider (206) is slidably connected to the middle of the inner wall of the fixing block (201). The slider (206) is set on the side adjacent to the inner wall of the clamping block (203). An anti-slip pad (207) is fixedly connected to the top of the outer wall of the slider (206).

3. The battery-powered heat preservation device according to claim 1, characterized in that: A bolt (15) is fixedly connected to the middle of the inner wall of the base plate (12), and an exhaust plate (14) is threaded around the outer wall of the bolt (15).

4. The battery-powered heat preservation device according to claim 1, characterized in that: Screws (16) are threaded at the four corners of the bottom of the base plate (12), and foot pads (17) are fixedly connected to the bottom of the outer wall of each screw (16).

5. A battery-powered heat preservation device according to claim 1, characterized in that: The outer wall of the outer shell (5) is provided with grooves (19) on the left and right sides, and a folding frame (18) is rotatably connected to the middle of the inner wall of the groove (19).

6. A battery-powered heat preservation device according to claim 5, characterized in that: A handle (20) is rotatably connected to one side of the outer wall of the folding frame (18), and an anti-slip sleeve (21) is fixedly connected to the middle of the outer wall of the handle (20).

7. The battery-powered heat preservation device according to claim 1, characterized in that: A fixing buckle (22) is fixedly connected to the middle of the inner wall of the lunch box (1), and a spring plate (23) is fixedly connected to the top of the outer wall of the fixing buckle (22).

8. A battery-powered heat preservation device according to claim 7, characterized in that: A fixing strip (24) is fixedly connected to the bottom of the outer wall of the spring plate (23), and a sealing strip (25) is fixedly connected to the top of the outer wall of the base plate (12).

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