Packaging box capable of reheating food
By designing a packaging box with detachable sealing connection and leak-proof, the problem of self-heating food boxes is solved in the waste of space, highly susceptible dumping and food leakage in takeout or takeout scenarios, achieving a more compact, stable and safe heating effect .
Patent Information
- Application Number
- CN202421226444.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-31
AI Technical Summary
Existing self-heating food boxes have problems such as wasting space, highly susceptible to dumping, food leakage and unsafe heating processes in takeout or takeout scenarios.
A packaging box including a top cover and a bottom box is designed. The middle box is placed in the bottom box. The top cover is removably sealed and connected to the edge of the middle box. It is equipped with leakage prevention plug and exhaust holes. The flip edge is slackly assembled with the bottom box. Increase structural strength and stability, and reduce space occupancy and center of gravity.
Effectively avoid food leakage, reduce the height and center of gravity of the packaging box, improve structural strength, and ensure the safety and hygiene of the heating process.
Smart Images
Figure CN222330421U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of food packaging boxes, in particular to a packaging box capable of reheating food. Background Art
[0002] With the development of the times, people's pace of life is getting faster and faster. Ordering takeout or take-out has become the norm for many people to dine. Therefore, most restaurants provide lunch boxes for takeout or for customers to take out food. It usually takes half an hour or even an hour from the time the food is served in the restaurant to the time it is delivered or brought home. The food in the lunch box gets cold easily, especially in winter when it gets colder. If you can heat it at home, you can still use a microwave oven, but if you are outdoors or in the company and there is no heating condition, you can only eat the cold food directly, which affects the taste and health. Although many businesses put insulation bags on the lunch boxes, and the delivery boxes of takeaways have certain insulation functions, these measures can only slow down the rate of heat loss in the food. By the time the customer eats, the calories in the food are still far behind when it was just served.
[0003] At present, most of the existing self-heating food boxes are used to heat pre-prepared dishes, pre-prepared hot pots, etc. The ingredients are all vacuum-packed. The ingredients, packaging boxes and heating packs are packaged and sold as a whole, generally including an outer box body, a food box, a cover body, a heating pack and vacuum-packed ingredients. When using, first take the ingredients out of the vacuum packaging bag and put them into the food box, then inject clean water into the food box; then place the heating pack in the outer box body, add clean water to the outer box body, then put the food box into the outer box body and cover the cover body, wait for the heating pack to come into contact with water to generate heat to heat the food in the food box, and then it can be eaten.
[0004] However, the existing self-heating food boxes have the following disadvantages, which make them unsuitable for take-out or take-away use:
[0005] 1. In order to ensure that half-cooked or fully-cooked food can be heated to a sufficient degree for consumption, the existing self-heating food boxes are designed to have a large outer box body, and the food box must also be provided with sufficient depth to ensure a sufficiently large heating area, which results in the self-heating food boxes generally being relatively high. The excessive height causes a waste of space, which affects the number of takeaways that the takeaway boxes of the takeaway deliverymen can carry. At the same time, the excessive height also causes the self-heating food boxes to easily tip over during transportation;
[0006] 2. Existing self-heating food boxes are used only when they are needed to be eaten, so there is no leak-proof design. In the scenario of takeout or takeaway, the soup in the food box is easy to leak out due to the inevitable vibration or shaking during the delivery or takeaway process;
[0007] 3. When heating the existing self-heating food box, it is necessary to first open the cover, take out the food box, operate the heating bag, put the food box back into the outer box, and finally cover the cover. The whole operation is relatively cumbersome, and the steam generated by the heating bag during the heating process will directly contact the food in the food box, posing a food safety hazard;
[0008] Therefore, how to provide a packaging box that can reheat food and adapt to take-out and take-away scenarios has become a technical problem that needs to be solved urgently. Summary of the invention
[0009] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a packaging box that can be adapted to take-out and take-away scenarios and can reheat food.
[0010] The purpose of the utility model can be achieved through the following technical solutions:
[0011] A packaging box capable of reheating food, comprising a top cover and a bottom box and a middle box with openings on the upper sides, characterized in that: the middle box is placed in the bottom box, a cavity for accommodating a heating pack is provided between the lower side surface of the middle box and the bottom of the bottom box, an outwardly protruding flange is formed on the upper portion of the middle box, the flange is loosely assembled with the upper edge of the bottom box, the top cover is detachably sealed and connected to the edge of the middle box, the top cover and the middle box together form a accommodating cavity for accommodating food, the top cover is provided with a lower vent hole capable of connecting the accommodating cavity with the outside, and a leak-proof plug is installed at the lower vent hole to prevent soup leakage.
[0012] The top cover and the edge of the middle box in the packaging box are detachably sealed and connected, and the lower vent hole of the top cover is provided with a leak-proof plug, which can prevent the soup of the food in the middle box from leaking out during the take-out or take-away process as much as possible, and can also isolate the gas generated by the heating bag to prevent the gas from contacting the food, which is more hygienic and safe; in the packaging box, the middle box is placed in the bottom box, which can reduce the vertical height of the entire packaging box, and the structure is more compact, so that the packaging box occupies less space during the take-out or take-away process, and can also lower the center of gravity of the packaging box when it is filled with food, so that the packaging box is not easy to tip over, and can reduce the risk of tipping over due to the tilting of the packaging box. Furthermore, since this packaging box is mainly for take-out and take-away scenarios, the food in the middle box is already cooked and has residual temperature or has not been cooled for long. Therefore, there is no need to add water when heating this packaging box. The heating pack only needs to ensure that the food in the middle box can be heated to a little hot to restore the taste. It does not need to be heated to the point of complete boiling. Therefore, the height of the cavity between the middle box and the bottom of the bottom box can be designed to be more compact according to the situation. The overall height of the packaging box can be further reduced while meeting the heating requirements, so that the center of gravity of the entire packaging box is lower and placed more stably.
[0013] In the above-mentioned packaging box capable of reheating food, the middle portion of the top cover is recessed to form a temporary storage groove, the lower vent hole is arranged in the temporary storage groove, the lower end of the leak-proof plug is inserted into the temporary storage groove, the outer side wall of the leak-proof plug is sealedly connected to the groove wall of the temporary storage groove, the leak-proof plug is provided with an upper vent hole, and the upper vent hole and the lower vent hole are staggered.
[0014] During the above-mentioned distribution process, the hot air in the middle box can enter the temporary storage tank through the lower air vent, and then be discharged through the upper air vent provided on the leak-proof plug, thereby achieving the exhaust effect, preventing the internal pressure from being too high and separating the top cover from the middle box, which is beneficial to improving the stability of the connection between the middle box and the top cover; at the same time, when the packaging box is squeezed or vibrated, the soup enters the temporary storage tank from the lower air vent. In most cases, the soup can flow back into the accommodating cavity from the lower air vent. Only when the squeezing is more severe and a large amount of soup flows out, part of the soup can flow out through the upper air vent. This design reduces the probability and flow rate of soup leakage; the staggered arrangement of the upper and lower air holes can prevent the soup from directly splashing into the upper air hole and flowing out after flowing through the lower air hole, further reducing the occurrence of leakage.
[0015] Preferably, a protruding block protruding upward is provided in the middle of the temporary storage groove, and a leak-proof groove and a liquid storage groove are provided on the leak-proof plug, the opening of the leak-proof groove faces downward, the upper part of the protrusion can extend into the leak-proof groove and there is a ventilation gap between the outer surface of the protrusion and the leak-proof groove, the lower side surface of the leak-proof plug and the bottom of the temporary storage groove also have a ventilation gap, and the upper ventilation hole is provided at the bottom of the leak-proof groove; the liquid storage groove is annular and is located outside the leak-proof groove, and the opening of the liquid storage groove faces upward.
[0016] In the above-mentioned packaging box capable of reheating food, the edge of the top cover is bent to form an outer buckle portion, and the edge of the middle box is bent to form an inner buckle portion, the inner buckle portion can be inserted into the outer buckle portion and elastically deformed to engage therebetween, the flange is formed on the outer side of the inner buckle portion, and an exhaust hole is provided on the upper part of the flange or the side wall of the bottom box.
[0017] The top cover and the middle box in the packaging box are sealed and connected by elastic snapping of the outer buckle part and the inner buckle part, and the connection is convenient and stable. At the same time, the design of the outer buckle part and the inner buckle part can also enhance the structural strength of the outer edge of the top cover and the upper edge of the middle box to a certain extent, thereby preventing the soup from leaking out due to deformation caused by pressure during delivery or take-out. Exhaust holes are arranged on the flap or the side wall of the bottom box, so that the hot air and steam generated by the heating pack can be discharged through the exhaust holes, avoiding direct contact between the steam generated by the heating pack and the food in the middle box, which is cleaner and more hygienic, and can also avoid excessive pressure in the cavity surrounded by the bottom box and the middle box to push the middle box open.
[0018] In the above-mentioned packaging box capable of reheating food, a top cover boss is formed in the middle of the top cover, the lower vent hole and the anti-leakage plug are arranged on the top cover boss, an annular top cover groove is formed by bending downward on the top cover inside the outer buckle part, a step part is provided between the side wall of the middle box and the outer buckle part, and the bottom of the top cover groove can abut against the step part.
[0019] Existing self-heating food boxes contain heating packs and vacuum-packed pre-prepared dishes or pre-prepared hot pots and other foods, which do not contain excessive moisture. Therefore, they are very light and there is no requirement for the structural strength of the self-heating food boxes. In a takeout scenario, the meal box may be placed at the bottom of the takeout box, and other heavier takeouts may be stacked on top of the meal box. Therefore, there are higher requirements for the structural strength of the self-heating food boxes, especially the vertical structural strength.
[0020] The above-mentioned top cover groove and step portion cooperate so that the middle box can provide better support for the top cover. Even if the same packaging boxes or other take-out foods are stacked on the top cover, the top cover will not be seriously concave and deformed, which is beneficial to improving the overall structural strength of the packaging box; the design of the top cover boss can also improve the structural strength of the top cover; further, the design of the top cover groove and the top cover boss makes the entire top cover present a multi-step shape, which is higher towards the middle of the top cover, and the lower vent hole and the anti-leakage plug are arranged on the top cover boss, which can more conveniently discharge the hot air in the accommodating cavity, thereby avoiding scalding of hands by water vapor generated by heated food when opening the cover.
[0021] In the above-mentioned packaging box capable of reheating food, the outer edge of the flap is bent downward to form a guide edge, the upper end of the bottom box is bent to form a "J"-shaped reinforcement rib, the lower side surface of the flap can abut against the upper side surface of the reinforcement rib, and the guide edge is located on the outside of the reinforcement rib and can wrap the upper and middle part of the reinforcement rib.
[0022] The reinforcing ribs on the above-mentioned bottom box can enhance the structural strength of the bottom box, making the entire packaging box more suitable for the use environment of takeout and take-away; the design of the flap and guide edge can make the middle box and the bottom box have a certain degree of sealing when assembled. At the same time, since the flap and the guide edge are only placed on the reinforcing ribs, there is no snap-on, plug-in or tight-fitting connection, so the connection between the middle box and the bottom box is relatively loose, which facilitates the rapid assembly and rapid separation of the two, and is more convenient to use.
[0023] In the above-mentioned packaging box capable of reheating food, the middle box and the bottom box are both rectangular, the folded edges at the four corners of the middle box are concave to form a middle box groove, the reinforcing rib can be inserted into the gap between the middle box groove and the guide edge, and there are two exhaust holes and they are arranged in two diagonal middle box grooves.
[0024] The design of the above-mentioned four middle box grooves can enhance the structural strength at the four corners of the middle box, and when food is placed in the middle box, the outer wall of the middle box groove can also cooperate with the guide edge to clamp the reinforcing ribs of the bottom box between the two, thereby realizing horizontal positioning of the middle box and the bottom box, avoiding large relative movement between the middle box and the bottom box, causing the middle box to tilt, thereby enhancing the overall structural strength of the packaging box and reducing the possibility of soup leakage; the design of the diagonally arranged exhaust holes can achieve uniform exhaust, avoiding uneven accumulation of hot air between the bottom box and the middle box, thereby avoiding burns to the hands when lifting the middle box.
[0025] In the above-mentioned packaging box capable of reheating food, a baffle is provided at the exhaust hole to prevent gas from being discharged vertically upward, and the baffle is fixedly connected to the bottom, wall or edge of the groove of the middle box; the edge of the top cover is formed with an easy-to-lift portion.
[0026] Preferably, the easy-to-lift portion is located above the groove of the middle box where no exhaust hole is provided, and the design of the easy-to-lift portion can facilitate separation of the top cover and the middle box.
[0027] After the baffle is set, the hot air and steam discharged from the exhaust hole will first hit the baffle and then be discharged horizontally or obliquely upward, preferentially hitting the side wall of the middle box groove, thereby dispersing and cooling the steam.
[0028] In the above-mentioned packaging box capable of reheating food, a middle box lifting ear is provided on the edge of the middle box, a bottom box lifting ear is provided at the upper edge of the bottom box, the middle box lifting ear and the bottom box lifting ear are staggered, or the middle box lifting ear wraps the bottom box lifting ear and the bottom box lifting ear has a notch for a finger to pass through.
[0029] The design of the bottom box lifting ears facilitates the movement of the entire packaging box, and the design of the middle box lifting ears facilitates the movement of the middle box, making it convenient to put the middle box into the bottom box or to take the middle box out of the bottom box; the staggered middle box lifting ears and bottom box lifting ears can prevent the movement of the middle box and the movement of the bottom box from interfering with each other, making it convenient for users to grasp the corresponding lifting ears as needed; the middle box lifting ears wrap the bottom box lifting ears and the bottom box lifting ears have notches for fingers to pass through, which can enhance the structural strength of the lifting ears. At the same time, the notch design can also prevent the bottom box lifting ears from interfering with the moving middle box lifting ears, making the structure more compact and the shape more beautiful.
[0030] In the above-mentioned packaging box capable of reheating food, an upwardly protruding middle box boss is formed in the middle of the bottom surface of the middle box, and the middle box boss is recessed downward to form a plurality of annular arc-shaped bosses protruding from the lower side surface of the middle box boss, and a plurality of radial ventilation grooves are circumferentially spaced apart on the upper surface of the middle box bottom between the middle box boss and the middle box side wall, and a plurality of vertical ventilation grooves are circumferentially spaced apart on the outer peripheral wall of the middle box, and the vertical ventilation grooves and radial ventilation grooves are staggered.
[0031] The design of the above-mentioned middle box boss can form an upwardly concave area in the middle part of the bottom surface of the middle box. The hot air generated by the heating pack will first gather in the concave area, and then be evenly discharged outward through the radial ventilation grooves into the space between the bottom box and the side walls of the middle box, and then rise to the top of the bottom box along the vertical ventilation grooves and move circumferentially along the inner wall of the reinforcing ribs, and finally be discharged through the exhaust holes. During the whole process, the food in the middle box can be heated more evenly; the design of the radial ventilation grooves and the vertical ventilation grooves cannot make all the hot air move along the two, but play a guiding role, so that most of the hot air can move along the two, so that the whole middle box is heated relatively evenly. Furthermore, the design of the arc-shaped protrusions, radial ventilation grooves and vertical ventilation grooves can increase the heating area of the middle box, improve the utilization rate of heat, and enhance the structural strength of the middle box, so that the middle box is not easily deformed by extrusion or vibration during takeout and takeaway, and the possibility of soup leakage is reduced. In particular, the vertical ventilation grooves can greatly enhance the vertical pressure-bearing capacity of the middle box, making this packaging box more suitable for takeaway or takeaway usage scenarios.
[0032] In the above-mentioned packaging box capable of reheating food, the middle part of the bottom box protrudes upward to form a supporting part, the upper end of the supporting part abuts against or has a small gap with the arc-shaped protrusion of the middle box boss, and there is a cavity for accommodating a heating pack between the supporting part and the left and right walls of the bottom box, and there is a gap for gas to pass between the supporting part and the front and rear side walls of the bottom box.
[0033] The design of the above-mentioned support part can not only support the middle box and prevent the middle box from being too heavy and deformed after being filled with food, but also enhance the structural strength of the bottom box; at the same time, the arc-shaped protrusion arranged on the lower side of the middle box boss of the middle box can also cooperate with the support part, and after the bottom surface of the middle box abuts against the support part, a gap can be formed for hot air to pass through, so that the abutment between the middle box and the support part can also be heated, so that the food in the middle box can be heated more evenly.
[0034] Compared with the prior art, the technical effects of the utility model are:
[0035] 1. The top cover and the edge of the middle box of the utility model are detachably sealed and connected, and the lower vent hole of the top cover is provided with a leak-proof plug, which can prevent the soup of the food in the middle box from leaking during takeout or takeaway as much as possible, and can also isolate the gas generated by the heating bag when heating, and prevent the gas from contacting the food, which is more hygienic and safe;
[0036] 2. In the present invention, the middle box is placed inside the bottom box, which can reduce the vertical height of the entire packaging box, making the structure more compact, so that the packaging box occupies less space during takeout or take-out, and can also lower the center of gravity of the packaging box when it is filled with food, so that the packaging box is not easy to tip over, and can reduce the situation where the soup leaks out due to the tipping of the packaging box;
[0037] 3. The height of the cavity between the middle box and the bottom of the bottom box of the utility model is more compact, which further reduces the overall height of the packaging box while meeting the heating requirements, so that the center of gravity of the entire packaging box is lower and placed more stably. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0039] Figure 2 The utility model is a cross-sectional view Figure 1 .
[0040] Figure 3 The utility model is a cross-sectional view Figure 2 .
[0041] Figure 4 It is an exploded view of the utility model.
[0042] Figure 5 yes Figure 2 A partial enlarged view of point A in the middle.
[0043] Figure 6 yes Figure 3 A partial enlarged view of point B in the middle.
[0044] Figure 7 yes Figure 3 A partial enlarged view of point C in the middle.
[0045] Figure 8 This is a partial enlargement of the groove of the middle box of the utility model. Figure 1 .
[0046] Fig. 9 This is a partial enlargement of the groove of the middle box of the utility model. Figure 2 .
[0047] In the figure, 1, bottom box; 11, reinforcing ribs; 12, bottom box lifting ears; 121, notches; 13, supporting parts; 2, middle box; 21, turning edges; 211, guiding edges; 212, middle box grooves; 213, exhaust holes; 214, baffles; 22, inner buckle parts; 23, step parts; 24, middle box lifting ears; 25, middle box bosses; 251, arc-shaped protrusions; 26, radial ventilation grooves; 27, vertical ventilation grooves; 3, top cover; 31, lower ventilation holes; 32, temporary storage grooves; 321, bumps; 33, outer buckle parts; 34, top cover bosses; 35, top cover grooves; 36, easy-to-lift parts; 4, leak-proof plugs; 41, upper ventilation holes; 42, leak-proof grooves; 43, liquid storage tanks. DETAILED DESCRIPTION
[0048] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0049] The packaging box capable of reheating food comprises a top cover 3 and a bottom box 1 and a middle box 2 with openings on the upper sides. The middle box 2 is placed in the bottom box 1. A cavity for accommodating a heating pack is provided between the lower side surface of the middle box 2 and the bottom of the bottom box 1. An outwardly protruding flange 21 is formed on the upper portion of the middle box 2. The flange 21 is loosely assembled with the upper edge of the bottom box 1. The top cover 3 is detachably sealed and connected to the edges of the middle box 2. The top cover 3 and the middle box 2 are combined to form a accommodating cavity for accommodating food. A lower vent hole 31 capable of connecting the accommodating cavity with the outside is provided on the top cover 3. A leak-proof plug 4 is installed at the lower vent hole 31 to prevent soup leakage. The edges of the top cover 3 and the middle box 2 in the present packaging box are detachably sealed and connected, and the lower vent hole 31 of the top cover 3 is provided with a leak-proof plug 4, which can prevent the soup of the food in the middle box 2 from leaking as much as possible during the takeaway or takeout process, and can also isolate the gas generated when the heating bag is heated to prevent the gas from contacting the food, which is more hygienic and safe; in the present packaging box, the middle box 2 is placed in the bottom box 1, which can reduce the vertical height of the entire packaging box, and the structure is more compact, so that the packaging box occupies less space during the takeaway or takeout process, and can also lower the center of gravity of the packaging box when it is filled with food, so that the packaging box is not easy to tip over, which can reduce the risk of packaging The box will tip over and cause the soup to leak out; further, since the packaging box is mainly for take-out and take-away scenarios, the food in the middle box 2 is already cooked and has residual temperature or has been cooled for a short time. Therefore, there is no need to add additional water when heating the packaging box. The heating pack only needs to ensure that the food in the middle box 2 can be heated to a little hot to restore the taste. It does not need to be heated to the point of complete boiling. Therefore, the height of the cavity between the middle box 2 and the bottom of the bottom box 1 can be designed to be more compact according to the situation. The overall height of the packaging box can be further reduced while meeting the heating requirements, so that the center of gravity of the entire packaging box is lower and placed more stably.
[0050] like Figure 1 and Figure 7As shown, the middle part of the top cover 3 is concave to form a temporary storage groove 32, the lower vent hole 31 is arranged in the temporary storage groove 32, the lower end of the leak-proof plug 4 is inserted into the temporary storage groove 32, the outer wall of the leak-proof plug 4 is sealed with the groove wall of the temporary storage groove 32, and the leak-proof plug 4 is provided with an upper vent hole 41, and the upper vent hole 41 and the lower vent hole 31 are staggered; preferably, the middle part of the temporary storage groove 32 is provided with a protruding block 321 protruding upward, and the leak-proof plug 4 is provided with The leak-proof groove 42 and the liquid storage groove 43, the opening of the leak-proof groove 42 faces downward, the upper part of the protrusion 321 can extend into the leak-proof groove 42 and there is a ventilation gap between the outer surface of the protrusion 321 and the leak-proof groove 42, the lower side of the leak-proof plug 4 and the bottom of the temporary storage groove 32 also have a ventilation gap, and the upper ventilation hole 41 is arranged at the bottom of the leak-proof groove 42; the liquid storage groove 43 is annular and is located outside the leak-proof groove 42, and the opening of the liquid storage groove 43 faces upward. During the distribution process, the hot air in the middle box 2 can enter the temporary storage tank 32 through the lower vent hole 31, and then be discharged through the upper vent hole 41 provided on the leak-proof plug 4, so as to achieve the exhaust effect, prevent the internal pressure from being too large and separating the top cover 3 from the middle box 2, which is beneficial to improve the stability of the connection between the middle box 2 and the top cover 3; at the same time, when the packaging box is squeezed or vibrated, the soup enters the temporary storage tank 32 from the lower vent hole 31. In most cases, the soup can flow back into the accommodating cavity from the lower vent hole 31. Only when the squeezing is relatively strong, the soup will flow back into the accommodating cavity. When a large amount of soup flows out, part of the soup can flow out through the upper vent hole 41. This design reduces the probability and flow rate of soup leakage; the staggered arrangement of the upper vent hole 41 and the lower vent hole 31 can prevent the soup from directly splashing into the upper vent hole 41 and flowing out after flowing through the lower vent hole 31, further reducing the occurrence of leakage; even if part of the soup is discharged from the upper vent hole 41, the design of the liquid storage tank 43 can be used to receive the leaked soup, preventing the soup from flowing all over the upper end of the top cover 3, which is cleaner and more hygienic.
[0051] like Figure 2-6 As shown, the edge of the top cover 3 is bent to form an outer buckle portion 33, and the edge of the middle box 2 is bent to form an inner buckle portion 22. The inner buckle portion 22 can be inserted into the outer buckle portion 33 and elastically deform and engage therebetween. The flange 21 is formed on the outer side of the inner buckle portion 22, and an exhaust hole 213 is provided on the upper part of the flange 21 or the side wall of the bottom box 1. In the present packaging box, the top cover 3 and the middle box 2 are sealed and connected by elastically snapping the outer buckle part 33 and the inner buckle part 22, and the connection is convenient and stable; at the same time, the design of the outer buckle part 33 and the inner buckle part 22 can also enhance the structural strength of the outer edge of the top cover 3 and the upper edge of the middle box 2 to a certain extent, thereby preventing the soup from leaking out due to deformation caused by pressure during delivery or take-away; exhaust holes 213 are provided on the flange 21 or the side wall of the bottom box 1, and the hot air and steam generated by the heating pack when heating can be discharged through the exhaust holes 213, avoiding the steam generated by the heating pack from directly contacting the food in the middle box 2, which is cleaner and more hygienic, and can also avoid excessive pressure in the cavity surrounded by the bottom box 1 and the middle box 2 to push the middle box 2 open.
[0052] like Figure 3 and Figure 7 As shown, a top cover boss 34 is formed in the middle of the top cover 3, the lower vent hole 31 and the anti-leakage plug 4 are arranged on the top cover boss 34, and an annular top cover groove 35 is formed on the top cover 3 on the inner side of the outer buckle 33, and a step portion 23 is arranged between the side wall of the middle box 2 and the outer buckle 33, and the bottom of the top cover groove 35 can abut against the step portion 23. The existing self-heating food box is very light because it contains heating packs and vacuum-packed pre-prepared dishes or pre-prepared hot pots and other foods, which do not have too much water. Therefore, there is no requirement for the structural strength of the self-heating food box; in the takeaway scenario, the meal box may be placed at the bottom of the takeaway box, and other heavier takeaways may be stacked on top of the meal box, so there are higher requirements for the structural strength of the self-heating food box, especially the vertical structural strength. The above-mentioned top cover groove 35 and step portion 23 cooperate with each other, so that the middle box 2 can better support the top cover 3. Even if the same packaging boxes or other take-out foods are stacked on the top cover 3, the top cover 3 will not be seriously concave and deformed, which is beneficial to improving the overall structural strength of the present packaging box; the design of the top cover boss 34 can also improve the structural strength of the top cover 3; further, the design of the top cover groove 35 and the top cover boss 34 makes the entire top cover 3 present a multi-step shape, which is higher as it is closer to the middle of the top cover 3, and the lower vent 31 and the anti-leakage plug 4 are arranged on the top cover boss 34, which can more conveniently discharge the hot air in the accommodating cavity smoothly, thereby avoiding scalding of hands by water vapor generated by heated food when opening the cover.
[0053] like Figure 4 and Figure 6 As shown, the outer edge of the flange 21 is bent downward to form a guide edge 211, and the upper end of the bottom box 1 is bent to form a "J"-shaped reinforcing rib 11. The lower side of the flange 21 can abut against the upper side of the reinforcing rib 11, and the guide edge 211 is located on the outer side of the reinforcing rib 11 and can wrap the middle and upper part of the reinforcing rib 11. The reinforcing rib 11 on the bottom box 1 can enhance the structural strength of the bottom box 1, so that the entire packaging box can be more suitable for the use environment of take-out and take-away; the design of the flange 21 and the guide edge 211 can make the middle box 2 and the bottom box 1 have a certain degree of sealing when assembled. At the same time, because the flange 21 and the guide edge 211 are only placed on the reinforcing rib 11, there is no clamping, plugging or tight fitting connection, so the connection between the middle box 2 and the bottom box 1 is relatively loose, which is convenient for the rapid assembly and separation of the two, and more convenient to use.
[0054] like Figure 1 , Figure 2 and Figure 8As shown, the middle box 2 and the bottom box 1 are both rectangular, and the edges 21 at the four corners of the middle box 2 are concave to form a middle box groove 212. The reinforcing rib 11 can be inserted into the gap between the middle box groove 212 and the guide edge 211. There are two exhaust holes 213 and they are arranged in the middle box grooves 212 at two diagonals. The design of the above four middle box grooves 212 can enhance the structural strength of the four corners of the middle box 2, and when the middle box 2 is filled with food, the outer wall of the middle box groove 212 can also cooperate with the guide edge 211 to clamp the reinforcing rib 11 of the bottom box 1 between the two, so as to achieve the horizontal positioning of the middle box 2 and the bottom box 1, avoid the large relative movement between the middle box 2 and the bottom box 1, and cause the middle box 2 to tilt, thereby enhancing the overall structural strength of the packaging box and reducing the possibility of soup leakage; the design of the exhaust holes 213 arranged diagonally can achieve uniform exhaust, avoid uneven accumulation of hot air between the bottom box 1 and the middle box 2, and avoid scalding the hands when lifting the middle box 2.
[0055] As another option, Fig. 9 As shown, a baffle 214 is provided at the exhaust hole 213 to prevent the gas from being discharged vertically upward, and the baffle 214 is fixedly connected to the groove bottom or groove wall or the flange 21 of the middle box groove 212; and an easy-to-lift portion 36 is formed on the edge of the top cover 3. After the baffle 214 is provided, the hot air and steam discharged from the exhaust hole 213 will first hit the baffle 214 and then be discharged in a horizontal direction or an oblique upward direction, and will first hit the side wall of the middle box groove 212, thereby dispersing and cooling the steam.
[0056] Preferably, the easy-to-lift portion 36 is located above the middle box groove 212 where no exhaust hole 213 is provided. The design of the easy-to-lift portion 36 can facilitate the separation of the top cover 3 and the middle box 2.
[0057] like Figure 4 and Figure 5 As shown, a middle box lifting ear 24 is provided at the edge of the middle box 2, and a bottom box lifting ear 12 is provided at the upper edge of the bottom box 1. The middle box lifting ear 24 and the bottom box lifting ear 12 are staggered, or the middle box lifting ear 24 wraps the bottom box lifting ear 12 and the bottom box lifting ear 12 has a notch 121 for a finger to pass through. The design of the bottom box lifting ear 12 facilitates the movement of the entire packaging box, and the design of the middle box lifting ear 24 facilitates the movement of the middle box 2, so as to facilitate the placement of the middle box 2 into the bottom box 1 or the removal of the middle box 2 from the bottom box 1; the staggered middle box lifting ears 24 and the bottom box lifting ears 12 can prevent the movement of the middle box 2 and the movement of the bottom box 1 from interfering with each other, so that the user can grasp the corresponding lifting ears as needed; the middle box lifting ears 24 wrap the bottom box lifting ears 12 and the bottom box lifting ears 12 have notches 121 for fingers to pass through, which can enhance the structural strength of the lifting ears. At the same time, the design of the notches 121 can also prevent the bottom box lifting ears 12 from interfering with the moving middle box lifting ears 24, so that the structure is more compact and the shape is more beautiful.
[0058] like Figure 1-4As shown, a middle box boss 25 protruding upward is formed in the middle of the bottom surface of the middle box 2, and the middle box boss 25 is recessed downward to form a number of annular arc-shaped protrusions 251 protruding from the lower side of the middle box boss 25, and a plurality of radial ventilation grooves 26 are circumferentially spaced along the upper surface of the bottom surface of the middle box 2 between the middle box boss 25 and the side wall of the middle box 2, and a plurality of vertical ventilation grooves 27 are circumferentially spaced along the outer peripheral wall of the middle box 2, and the vertical ventilation grooves 27 and the radial ventilation grooves 26 are staggered; the middle part of the bottom box 1 protrudes upward to form a support portion 13, and the upper end of the support portion 13 abuts against or has a small gap with the arc-shaped protrusion 251 of the middle box boss 25, and there is a cavity for accommodating a heating pack between the support portion 13 and the left side wall and the right side wall of the bottom box 1, and there is a gap for gas to pass between the support portion 13 and the front side wall and the rear side wall of the bottom box 1. The design of the middle box boss 25 can form an upwardly concave area in the middle of the bottom surface of the middle box 2. The hot air generated by the heating pack will first gather in the concave area, and then be evenly discharged outward through the radial ventilation grooves 26 into the space between the side walls of the bottom box 1 and the middle box 2, and then rise to the top of the bottom box 1 along the vertical ventilation grooves 27 and move circumferentially along the inner wall of the reinforcing rib 11, and finally be discharged through the exhaust holes 213. During the whole process, the food in the middle box 2 can be heated more evenly. The design of the radial ventilation grooves 26 and the vertical ventilation grooves 27 cannot make all the hot air move along the two. Instead, they play a guiding role, allowing most of the hot air to move along the two, so that the middle box 2 as a whole is heated relatively evenly. Furthermore, the design of the arc-shaped protrusion 251, the radial ventilation grooves 26 and the vertical ventilation grooves 27 can increase the heating area of the middle box 2, improve the heat utilization rate, and enhance the structural strength of the middle box 2, so that the middle box 2 is not easily deformed by squeezing or vibration during the process of takeout and delivery, and the possibility of soup leakage is reduced. In particular, the vertical ventilation grooves 27 can greatly enhance the vertical pressure-bearing capacity of the middle box 2, making this packaging box more suitable for takeout or takeaway usage scenarios. The design of the above-mentioned support part 13 can not only support the middle box 2 and prevent the middle box 2 from being too heavy and deformed after being filled with food, but also enhance the structural strength of the bottom box 1; at the same time, the arc-shaped protrusion 251 arranged on the lower side of the middle box boss 25 of the middle box 2 can also cooperate with the support part 13, and after the bottom surface of the middle box 2 abuts against the support part 13, a gap can be formed for hot air to pass through, so that the abutment between the middle box 2 and the support part 13 can also be heated, so that the food in the middle box 2 can be heated more evenly.
[0059] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.
Claims
1. A packaging box capable of reheating food, comprising a top cover (3), a bottom box (1) and a middle box (2) with upper openings, characterized in that: The middle box (2) is placed in the bottom box (1); a cavity for accommodating a heating pack is provided between the lower side of the middle box (2) and the bottom of the bottom box (1); an outwardly protruding flange (21) is formed on the upper part of the middle box (2); the flange (21) is loosely assembled with the upper edge of the bottom box (1); the top cover (3) is detachably sealedly connected to the edge of the middle box (2); the top cover (3) and the middle box (2) are combined to form a accommodating cavity for accommodating food; the top cover (3) is provided with a lower vent hole (31) capable of connecting the accommodating cavity with the outside; a leak-proof plug (4) is installed at the lower vent hole (31) to prevent soup from leaking.
2. A food reheating packaging box according to claim 1, characterized in that: The middle part of the top cover (3) is concave to form a temporary storage groove (32), the lower vent hole (31) is arranged in the temporary storage groove (32), the lower end of the anti-leakage plug (4) is inserted into the temporary storage groove (32), the outer side wall of the anti-leakage plug (4) is sealedly connected to the groove wall of the temporary storage groove (32), and the anti-leakage plug (4) is provided with an upper vent hole (41), and the upper vent hole (41) and the lower vent hole (31) are staggered.
3. A food reheating packaging box according to claim 2, characterized in that: A protrusion (321) protruding upward is provided in the middle of the temporary storage groove (32); a leak-proof groove (42) and a liquid storage groove (43) are provided on the leak-proof plug (4); the opening of the leak-proof groove (42) faces downward; the upper part of the protrusion (321) can extend into the leak-proof groove (42); and a ventilation gap is provided between the outer surface of the protrusion (321) and the leak-proof groove (42); a ventilation gap is also provided between the lower side surface of the leak-proof plug (4) and the bottom of the temporary storage groove (32); the upper ventilation hole (41) is provided at the bottom of the leak-proof groove (42); the liquid storage groove (43) is annular and is located outside the leak-proof groove (42); and the opening of the liquid storage groove (43) faces upward.
4. A food reheating packaging box according to claim 1, characterized in that: The edge of the top cover (3) is bent to form an outer buckle portion (33), and the edge of the middle box (2) is bent to form an inner buckle portion (22). The inner buckle portion (22) can be inserted into the outer buckle portion (33) and elastically deform and engage with each other. The flange (21) is formed on the outer side of the inner buckle portion (22), and an exhaust hole (213) is provided on the upper part of the flange (21) or the side wall of the bottom box (1).
5. A food reheating packaging box according to claim 4, characterized in that: A top cover boss (34) is formed in the middle of the top cover (3), the lower vent hole (31) and the anti-leakage plug (4) are arranged on the top cover boss (34), an annular top cover groove (35) is formed by bending downward on the top cover (3) inside the outer buckle portion (33), a step portion (23) is provided between the side wall of the middle box (2) and the outer buckle portion (33), and the bottom of the top cover groove (35) can abut against the step portion (23).
6. A food reheating packaging box according to claim 1, characterized in that: The outer edge of the flange (21) is bent downward to form a guide edge (211), and the upper end of the bottom box (1) is bent to form a "J"-shaped reinforcing rib (11). The lower side surface of the flange (21) can abut against the upper side surface of the reinforcing rib (11), and the guide edge (211) is located outside the reinforcing rib (11) and can wrap the middle and upper part of the reinforcing rib (11).
7. A food reheating packaging box according to claim 6, characterized in that: The middle box (2) and the bottom box (1) are both rectangular, the flanges (21) at the four corners of the middle box (2) are concave to form a middle box groove (212), the reinforcing rib (11) can be inserted into the gap between the middle box groove (212) and the guide edge (211), and there are two exhaust holes (213) which are arranged in two diagonal middle box grooves (212).
8. A food reheating packaging box according to claim 7, characterized in that: The exhaust hole (213) is provided with a baffle (214) for preventing gas from being discharged vertically upwards, and the baffle (214) is fixedly connected to the groove bottom or groove wall or flange (21) of the middle box groove (212); and the edge of the top cover (3) is formed with an easy-to-lift portion (36).
9. A food reheating packaging box according to any one of claims 1 to 8, characterized in that: The edge of the middle box (2) is provided with a middle box lifting ear (24), and the upper edge of the bottom box (1) is provided with a bottom box lifting ear (12). The middle box lifting ear (24) and the bottom box lifting ear (12) are staggered, or the middle box lifting ear (24) wraps the bottom box lifting ear (12), and the bottom box lifting ear (12) has a notch (121) for a finger to pass through.
10. A food reheating packaging box according to any one of claims 1 to 8, characterized in that: A middle box boss (25) protruding upward is formed in the middle of the bottom surface of the middle box (2), and the middle box boss (25) is recessed downward to form a plurality of annular arc-shaped protrusions (251) protruding from the lower side surface of the middle box boss (25). A plurality of radial ventilation grooves (26) are arranged at intervals along the circumferential direction on the bottom surface of the middle box (2) between the middle box boss (25) and the side wall of the middle box (2), and a plurality of vertical ventilation grooves (27) are arranged at intervals along the circumferential direction on the outer peripheral wall of the middle box (2), and the vertical ventilation grooves (27) and the radial ventilation grooves (26) are arranged in a staggered manner.
11. A food reheating packaging box according to claim 10, characterized in that: The middle part of the bottom box (1) protrudes upward to form a support portion (13); the upper end of the support portion (13) abuts against or has a small gap with the arc-shaped protrusion (251) of the middle box boss (25); a cavity for accommodating a heating pack is provided between the support portion (13) and the left side wall and the right side wall of the bottom box (1); and a gap for gas to pass through is provided between the support portion (13) and the front side wall and the rear side wall of the bottom box (1).