CN218791055U - Inner container, food heat-preservation storage and transportation box, warming box and heat-preservation storage and transportation knapsack - Google Patents

Abstract

The application relates to an inner container, a food heat-preservation storage and transportation box, a warming box and a heat-preservation storage and transportation knapsack. An inner container includes a serving tray body having a receiving space, an open end having an outwardly extending expanded portion; the tray cover is provided with an outer edge at the edge, the outer edge is connected with the top of a vertical wall arranged in the circumferential direction, the bottom of the vertical wall is connected with the circumferential direction, a transverse wall extending towards the center of a region surrounded by the vertical wall is arranged, one side of the transverse wall is provided with a protruding part protruding out of the transverse wall, and the distance between the top surface of the protruding part and the transverse wall is smaller than the distance between the top edge of the vertical wall and the transverse wall; part of the edge area of the convex part is concave to form a U-shaped concave area formed by the convex part and the transverse wall, a handle is arranged on the convex part, and two ends of the handle are lapped on the tops of the opposite side walls of the concave area; the top surface of the bulge is provided with a vent valve; the fixing buckle is arranged on the side wall of the top of the serving tray body, so that the serving tray cover is fixed at the opening end of the serving tray body through the fixing buckle; and two ends of the lifting belt are respectively lapped on the opposite edges of the expansion part.

Description

Inner container, food heat-preservation storage and transportation box, warming box and heat-preservation storage and transportation knapsack

Technical Field

The application relates to the field of heat preservation equipment, in particular to an inner container, a food heat preservation storage and transportation box, a warming box and a heat preservation storage and transportation knapsack.

Background

In field life and work, the hot food can resist severe cold, the health and the working state of workers are guaranteed, the food is difficult to heat when the fire is generated in the field, and the fire is easy to cause. Therefore, the inner container for containing the hot food can be placed in the container with the heat preservation function, and when people need to eat food outdoors, the inner container in the container with the heat preservation function is taken out, so that the hot food in the inner container can be eaten.

However, the related inner container has a simpler structure, is only a tray body and a tray cover, and is placed in the container with the heat preservation function after being covered. Because the inner container is only simply closed, the self sealing performance is poor, and no corresponding hand-held position is available when the inner container is taken out and opened, which brings inconvenience to users.

In view of this, the present application is specifically proposed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inner container, this inner container solution leakproofness is poor, the inconvenient problem of operation.

The utility model discloses a first aspect provides an inner container, include:

the tray body is provided with an accommodating space, and the opening end of the tray body is provided with an expansion part extending outwards;

the tray cover is provided with an outward-turned outer edge at the edge, the outer edge is connected with the top of a vertical wall which is arranged in the circumferential direction, the bottom of the vertical wall is connected with a transverse wall which is arranged in the circumferential direction and extends towards the center of the area surrounded by the vertical wall, one side of the transverse wall, far away from the vertical wall, is provided with a protruding part protruding out of the transverse wall, and the distance between the top surface of the protruding part and the transverse wall is smaller than the distance between the top edge of the vertical wall and the transverse wall;

the edge area of part of the convex part is recessed to form a U-shaped recessed area formed by the convex part and the transverse wall, the bottom edge of the recessed part of the convex part is connected with the transverse wall, the convex part is provided with a handle, and two ends of the handle are lapped on the tops of the opposite side walls of the recessed area, so that fingers can be placed in the recessed area under the condition that the fingers grab the handle;

the top surface of the bulge is provided with a vent valve;

the fixing buckle is arranged on the side wall of the top of the serving tray body, so that the serving tray cover is fixed at the opening end of the serving tray body through the fixing buckle;

the two ends of the lifting belt are respectively overlapped on the opposite edges of the expansion part so as to lift the serving tray body through the lifting belt; wherein,

the serving tray cover is covered at the opening end of the serving tray body, the outer edge is lapped on the expansion part, the vertical wall is attached to the inner wall of the serving tray body, and a sealing ring is arranged outside the vertical wall; and under the condition that the vertical wall is attached to the inner wall of the serving tray body, the sealing ring, the serving tray body and the serving tray cover surround to form a closed space.

In an implementable mode, the portable electronic device further comprises two hanging lugs, the two hanging lugs are respectively arranged in the diagonal direction of the extension portion, two through holes are respectively arranged in the diagonal direction of the extension portion, and each hanging lug penetrates through the through hole and can slide in the through hole.

In an implementable manner, the number of the fixing buckles is two, and the two fixing buckles are separately arranged on the side walls of the two sides of the top of the tray body.

In an implementable mode, the lifting belt is in an I shape, the I-shaped lifting belt comprises two transverse belts and a vertical belt connecting the two transverse belts, and the end parts of the two ends of the transverse belts are bent to the same side to form a hook shape; the lifting belt is made of plastic materials with certain ductility, and the two ends of the transverse belt are correspondingly clamped on the two sides of the expansion part in the width direction of the serving tray body respectively.

The utility model provides a food heat-preservation storage and transportation box, which comprises the inner container, a heat-preservation storage and transportation box body and a heat-preservation storage and transportation box cover;

the heat-insulation storage and transportation box body and the heat-insulation storage and transportation box cover are both of hollow structures, and a heat-insulation layer is arranged inside each hollow structure; two inner containers are arranged in the heat-preservation storage and transportation box body side by side.

In an implementation manner, the heat preservation storage and transportation box further comprises a fixing frame, the edge of the fixing frame is connected with the circumferential inner wall of the heat preservation storage and transportation box body, two fixing frames are arranged on the fixing frame and are arranged in the shape of the outer peripheral wall of the inner container, and the two inner containers are respectively arranged in the fixing frames, so that the expansion part of the inner container is in lap joint with the fixing frames.

The third aspect of the present invention provides a food warming box, comprising the inner container, a warming box body and a warming box cover;

an electric heating device is arranged in the warming box cover, the warming box body is of a hollow structure, and a heat insulation layer is arranged in the hollow structure; four inner containers are placed in the warming box body, and the inner containers are placed side by side and stacked in two layers.

In an implementable mode, the electric heating device comprises a heating wire, the heating wire is attached to the inner wall of the warming box cover, a reflecting film is further arranged between the heating wire and the inner wall of the warming box cover, and the heating wire is connected with a power supply through a power supply interface or is connected with a power supply battery through the power supply interface.

The utility model provides a heat-preservation storage and transportation knapsack for food, which comprises the inner container, a knapsack body and a knapsack assembly;

the backpack body comprises a backpack body and a backpack cover; the bag body is a cuboid surrounded by a rectangular bottom surface and 4 side surfaces, the shape of the bag cover is the same as that of the rectangular bottom surface, and the 4 side surfaces respectively comprise an inner layer, a middle heat-insulating layer and an outer layer which are sequentially arranged; two inner containers are stacked up and down in the bag body; the backpack assembly comprises shoulder straps and a waist support, and the shoulder straps and the waist support are fixedly arranged on the rear side face of the bag body.

In an implementation mode, the bag body and the bag cover are closed through a waterproof zipper, and a handle is arranged at the top of the backpack body; the inner layer and the outer layer are both waterproof fabrics.

The utility model discloses beneficial effect:

an expansion part extending outwards is arranged at the opening end of the serving tray body, so that the serving tray body can be conveniently lapped and fixed; the outer edge of the serving tray cover can be lapped on the expansion part, so that the contact area between the serving tray cover and the serving tray body is increased, and the tightness is improved; in addition, the serving tray cover is also provided with a vertical wall connected with the outer edge, and the vertical wall is also provided with a sealing ring, so that the contact area between the vertical wall and the inner wall of the serving tray body is increased, and meanwhile, the sealing performance is further improved through the sealing ring. The two ends of the handle are overlapped on the tops of the opposite side walls of the concave area, so that the ends of fingers can be placed in the concave area under the condition that the fingers grab the handle; under the condition that the sealing performance of the serving tray body and the serving tray cover is good, negative pressure is formed in the serving tray body and the serving tray cover according to the principle of expansion with heat and contraction with cold, and the serving tray body can be conveniently separated from the serving tray body through the handle; the inner container can be lifted by using a lifting belt in the process of taking out the inner container, and the inner container can be lifted by holding the lifting belt by hand, so that the inner container is convenient to move. The fixed buckle provides the guarantee that the serving tray body and the serving tray body have the leakproofness after being covered.

The inner container is placed in the food heat-preservation storage and transportation box, and the food heat-preservation storage and transportation box is used for convenient transportation.

The inner container is placed in a food warming box, and the food in the inner container is heated by the food warming box.

The inner container is placed in a food warming box, and the food heat-preservation storage and transportation knapsack is utilized to facilitate the inner container to move to the field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a food warming box according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a food insulating storage and transportation box according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a backpack for heat preservation, storage and transportation of food according to an embodiment of the present application;

FIG. 4 is another schematic structural diagram of the backpack for heat preservation, storage and transportation of food according to the embodiment of the present application;

FIG. 5 is a schematic diagram of an inner container serving tray body in accordance with one embodiment of the present disclosure;

FIG. 6 is a schematic diagram of an inner container portion serving tray cover in accordance with an embodiment of the present disclosure;

FIG. 7 is a schematic view of an assembled inner container according to an embodiment of the present disclosure;

FIG. 8 is a top view of an inner container with a hanger according to one embodiment of the present application;

FIG. 9 is a side view of FIG. 8;

FIG. 10 is a schematic view of a hanger;

fig. 11 is a schematic structural diagram of a heat-insulating storage and transportation box cover in a specific embodiment of an embodiment of the present application;

fig. 12 is a schematic structural diagram of a temperature increasing box cover in a specific implementation manner of an embodiment of the present application.

Reference numerals:

1-food warming box; 11-a heating box body; 12-a warming box cover; 121-a second fixing protrusion;

2-food heat preservation storage and transportation box; 21-heat preservation storage and transportation box body; 22-insulating storage and transportation box covers; 221-a first fixing protrusion;

3-heat preservation, storage and transportation of the food are carried out by the knapsack; 31-a capsule body; 32-capsule cover; 33-waist support; 34-shoulder straps;

4-the inner vessel; 41-serving tray body; 411 — an expansion part; 412-hangers; 413-perforating; 42-share pan cover; 421-outer edge; 422-vertical wall; 423-transverse wall; 424-a boss; 425-a concave region; 426-a handle; 43-a gas permeable valve; 44-fixing a buckle; 45-lifting the belt.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms also include the plural forms unless the context clearly dictates otherwise, and further, it is understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The present application will be understood with reference to fig. 1-12.

As shown in fig. 5-10, an aspect of an embodiment of the present application relates to an inner container comprising a serving tray body 41, a serving tray lid 42, a securing catch 44, a venting valve 43 and a pull-out strip 45.

Wherein, it has the accommodation space to serve disk body 41, can put into the accommodation space with hot food from the open end, and it has the extension 411 of outside extension to serve disk body 41 open end.

The edge of the serving cover 42 is provided with an outward-turned outer edge 421, the outer edge 421 is connected with the top of a vertical wall 422 arranged in the circumferential direction, the bottom of the vertical wall 422 is connected with a transverse wall 423 arranged in the circumferential direction and extending towards the center of the area surrounded by the vertical wall 422, and one side of the transverse wall 423 away from the vertical wall 422 is provided with a convex part 424 protruding out of the transverse wall 423.

The outer edges 421 of the opposite sides of the length direction of the serving tray cover 42 are notched.

The distance between the top surface of the protrusion 424 and the transverse wall 423 is smaller than the distance between the top edge of the vertical wall 422 and the transverse wall 423. It is possible to prevent the projecting portion 424 from projecting when the inner containers 4 are stacked, resulting in poor stability when stacked.

When the serving tray cover 42 is covered on the open end of the serving tray body 41, the outer edge 421 is overlapped with the expansion part 411, the vertical wall 422 is in contact with the inner wall of the top of the serving tray body 41, the contact area between the outer edge 421 of the serving tray cover 42 and the vertical wall 422 and the serving tray body 41 is increased, and further the sealing performance of the area surrounded by the serving tray cover 42 and the serving tray body 41 is improved.

The edge region of the convex part 424 is concave to form a U-shaped concave region 425 formed by the convex part 424 and the transverse wall 423, the bottom edge of the concave part of the convex part 424 is connected with the transverse wall 423, a handle 426 is arranged on the convex part 424, and two ends of the handle 426 are overlapped on the top of opposite side walls of the concave region 425, so that fingers can be placed in the concave region 425 under the condition that the fingers grab the handle 426.

The top surface of the raised part 424 is provided with a vent valve 43, and the pressure difference between the inner container 4 and the outside is restored through the vent valve 43.

Specifically, under the condition that hot food is placed in the serving tray body 41, the air vent valve 43 is firstly opened, then the serving tray cover 42 covers the serving tray body 41, in the process, air in the area surrounded by the serving tray body 41 and the serving tray cover 42 can be exhausted through the air vent valve 43, when the covering action of the serving tray body 41 and the serving tray cover 42 is completed, the air vent valve 43 is closed, and therefore the situation that the air pressure in the area surrounded by the serving tray body 41 and the serving tray cover 42 is larger than the external air pressure in the covering process to influence the sealing performance is avoided. In the process of opening the serving tray body 41 and the serving tray cover 42, because the temperature of the food heated in the area surrounded by the serving tray body 41 and the serving tray cover 42 is reduced, the air pressure in the area surrounded by the serving tray body 41 and the serving tray cover 42 is lower than the external air pressure according to the principle of expansion with heat and contraction with cold, in this case, the effort required for directly separating the serving tray body 41 from the serving tray cover 42 is large, and the opening is difficult. Based on this, the air vent valve 43 is opened first, and the serving tray body 41 and the serving tray cover 42 are separated from each other under the condition that the air pressure in the serving tray body 41 and the serving tray cover 42 is the same as the air pressure in the outside.

And a fixing buckle 44 arranged on the top side wall of the serving tray body 41, so that the serving tray cover 42 is fixed at the open end of the serving tray body 41 through the fixing buckle 44.

Specifically, the number of the fixing buckles 44 is two, and the two fixing buckles 44 are separately arranged on the side walls of the two sides of the top of the serving tray body 41.

And two ends of the lifting belt 45 are respectively overlapped at the opposite edges of the expansion part 411, so that the serving tray body 41 is lifted up through the lifting belt 45.

Specifically, the lifting belt 45 is i-shaped, the i-shaped lifting belt 45 comprises two transverse belts and a vertical belt connecting the two transverse belts, the two transverse belts are the same in length, and the end parts of the two ends of the transverse belts are bent to the same side to form a hook shape; the lifting belt 45 is made of plastic with certain ductility, and two ends of the transverse belt are correspondingly clamped on two sides of the expansion portion 411 in the width direction of the serving tray body 41.

The distance between the length-removed bent portion of the cross-band and the two sides of the extension portion 411 is slightly larger, so that the cross-band can be clamped at the two side edges of the extension portion 411 in a hook shape by utilizing the ductility and deformability of plastic. Not only can guarantee that the horizontal strap joint is in extension portion 411 both sides, can also guarantee that the horizontal strap is in the joint behind extension portion 411 with the interference fit of share disk body 41, stability when guaranteeing portable lifting belt 45.

When the inner container is placed in a space having a certain depth, the inner container can be quickly lifted by the lifting tape 45.

The serving tray body 41 and the serving tray cover 42 are made of food-grade metal materials 304 or 316 stainless steel and can be recycled, and the lifting belt 45 is made of plastic and can also be recycled, so that the method is beneficial to environmental protection and is particularly suitable for field environments.

The sealing ring and the ventilation valve 43 are made of food-grade silica gel materials.

As shown in fig. 8 to 10, in one embodiment, the inner container further includes two hanging lugs 412, the two hanging lugs 412 are respectively arranged in the diagonal direction of the expansion portion 411, two through holes 413 are respectively arranged in the diagonal direction of the expansion portion 411, and each hanging lug 412 passes through the through hole 413 and can slide in the through hole 413.

The hanging lug 412 has two limiting feet, and the two limiting feet are bent at a certain angle after passing through the through hole 413, so that the hanging lug 412 is limited in the through hole 413 and can only slide in a certain range.

In this embodiment, the two hanging lugs 412 can be lifted by hand to move the inner container, the hanging lugs are limited on the expanding portion 411, and when the inner container is used, the hanging lugs 412 are lifted, and the inner container can be driven by the hanging lugs 412 to move without repeated disassembly. Meanwhile, since the contact area of the hanging lug 412 with the extension part 411 is small, the hanging lug 412 can play a role of preventing scald when the hanging lug 412 is lifted.

As shown in fig. 2, a second aspect of the present invention relates to a heat-insulating food storage and transportation container, which includes the inner container 4, a heat-insulating storage and transportation container body, and a heat-insulating storage and transportation container cover.

The heat-insulation storage and transportation box body 21 and the heat-insulation storage and transportation box cover 22 are both of hollow structures, and a heat-insulation layer is arranged inside each hollow structure; two inner containers 4 are arranged in the heat-preservation storage and transportation box body 22 side by side.

The food heat-preservation storage and transportation box further comprises a fixed frame, the edge of the fixed frame is connected with the circumferential inner wall of the heat-preservation storage and transportation box body 21, two fixed frames which are arranged in the shape of the outer circumferential wall of the inner container 4 are arranged on the fixed frame, and the two inner containers 4 are respectively arranged in the fixed frames, so that the expansion part 411 of each inner container 4 is lapped on the fixed frames.

The outer walls of the heat-insulating storage and transportation box body 21 and the heat-insulating storage and transportation box cover 22 are both made of carbon fiber reinforced matrix composite materials, and the carbon fiber reinforced matrix composite materials are composite materials formed by taking carbon fibers or carbon fiber fabrics as reinforcements and taking resin, ceramics, metals, cement, carbon or rubber as matrixes. The aluminum alloy has high specific strength and specific rigidity in a plurality of light-weight materials, has obvious light-weight effect, is lighter than steel materials by 50 percent and lighter than aluminum materials by 30 percent, and is widely applied to aerospace and military products. The adoption of the fiber reinforced composite material can obviously reduce the weight of the food heat-preservation storage box and the food warming box, so that the food heat-preservation storage box and the food warming box are more convenient to transport. The heat-insulating layer is made of polyurethane foam material. The metal is food grade 304 stainless steel material.

The inner container 4 can be quickly taken out by using the hanging lug 412 arranged on the inner container 4.

As shown in fig. 1, the third aspect of the embodiment of the present application relates to a food warming box, which comprises the inner container 4, a warming box body 11 and a warming box cover 12.

The outer walls of the warming box body 11 and the warming box cover 12 are both made of carbon fiber reinforced composite materials, and the heat insulation layer is made of polyurethane foam materials.

An electric heating device is arranged in the warming box cover 12, the warming box body 11 is of a hollow structure, and a heat insulation layer is arranged in the hollow structure; four inner containers 4 are placed in the warming box body 11, and the inner containers 4 are placed side by side and stacked in two layers.

Electric heater unit includes the heater strip, the heater strip laminating is in the inner wall of heating case lid 12, just the heater strip with still be equipped with the reflectance coating between the inner wall of heating case lid 12, the heater strip passes through power source and is connected with the power, and the power can be commercial power or vehicle mounted power, also perhaps is connected with power supply battery through power source.

After the heating device is electrified, the heating device can generate heat to heat the inner container 4 in the box body. The food warming box 1 is internally provided with a temperature sensor and a controller, when the temperature in the warming box body 11 for containing hot food is lower than 75 ℃, the heating warming function is automatically started, so that the warming box body 11 is always at the temperature safe for food. The heating box body 11 is of a hollow structure, and a heat insulation layer is arranged inside the hollow structure; the warming box body 11 is used for placing four inner containers 4.

The heating box body 11 is internally provided with a fixed frame which has the same structure and the same effect as the fixed frame of the food heat-preservation storage and transportation box.

The inner container 4 can be quickly taken out by using the hanging lug 412 arranged on the inner container 4.

As shown in fig. 3 and 4, the backpack for keeping food warm and storing and transporting in four aspects of the present invention comprises the inner container 4, a backpack body and a backpack assembly.

Wherein the knapsack body comprises a knapsack body 31 and a knapsack cover 32; the bag body 31 is a cuboid surrounded by a rectangular bottom surface and 4 side surfaces, the bag cover 32 is the same as the rectangular bottom surface in shape, and the 4 side surfaces respectively comprise an inner layer, a middle heat-insulating layer and an outer layer which are sequentially arranged; two inner containers 4 are stacked up and down in the bag body 31; the backpack assembly comprises a shoulder strap 34 and a waist support 33, and the shoulder strap 34 and the waist support 33 are fixedly arranged on the rear side surface of the bag body 31.

The bag body 31 and the bag cover 32 are closed through a waterproof zipper, and a handle is arranged at the top of the backpack body; the inner layer and the outer layer are both waterproof fabrics.

The inner container 4 is stacked on the bag body 31, the inner container 4 at the top layer can be taken out through the hanging lug 412 arranged on the inner container 4, and the inner container 4 at the bottom part has a certain depth due to the position, so that the inner container 4 is inconvenient to take out by using the hanging lug, and the inner container 4 can be conveniently taken out by using the lifting belt 45.

The food heat-preservation storage and transportation box 2, the food warming box 1 and the food heat-preservation storage and transportation knapsack 3 adopt the same inner containers.

The food heat-preservation storage and transportation box 2 and the food warming box 1 are preferably prepared by adopting a carbon fiber reinforced composite material and polyurethane foam material integrated molding process.

It can be understood that the food heat preservation and storage box 2, the food warming box 1 and the food heat preservation and storage back bag 3 can be applied to different scenes, so that the food heat preservation and storage box 2, the food warming box 1 and the food heat preservation and storage back bag 3 can be used in combination. The requirements of outdoor dining are comprehensively met through combined use. When the meal is eaten in the open air, the hot meal and the hot soup are simultaneously supplied, and the meal is more suitable for the eating habits of people in China. In addition, in cold environment, the hot soup or hot drink can resist severe cold, and the body health and working state of field workers are guaranteed.

The specifications and the models of inner containers adopted in the food warming box 1, the food heat-preservation storage and transportation box 2 and the food heat-preservation storage and transportation knapsack 3 are completely the same, so that the food heat-preservation products are used in a matched mode, the food delivery standardization is realized, and the food warming box is particularly suitable for field dining of large-scale people. In the actual use process, the hot food is quickly placed in the inner container 4 (the temperature of the hot food is ensured to be 80 ℃ or above), then the inner container 4 filled with the hot food is firstly placed in the food warming box 1 or the food heat preservation storage and transportation box 2, transportation is carried out by adopting a transportation tool, and the temperature of the hot food in the inner container 4 is ensured. When the vehicle is not available for running under the condition of complex terrain in the field, the inner container 4 is further transported through the food heat preservation, storage and transportation knapsack 3. The high efficiency and the standardization of the hot food transportation are ensured, and the transportation, the heat preservation and the temperature increase of the hot food are convenient.

Wherein, the heat preservation effect of the food heat preservation storage box 2 is as follows: when the environment temperature is minus 50 ℃ to minus 40 ℃, hot food (more than 80 ℃) is contained for heat preservation for 2 to 3 hours, the food temperature is not lower than 65 ℃, and when the environment temperature is 40 ℃ to 50 ℃, cold food (less than 4 ℃) is contained for heat preservation for 3 to 5 hours, the food temperature is not higher than 10 ℃. The food warming box 1 has the following heat preservation and warming effects: when the temperature in the box body for containing hot food is lower than 75 ℃, the heating function is automatically started, so that the temperature in the box body is always at the food safety temperature. The heat preservation effect of the food heat preservation storage and transportation knapsack 3 is as follows: when the environment temperature is-50 to-40 ℃, the hot food (more than 80 ℃) is held for 0.5 to 1.5 hours, and the temperature of the hot food is not lower than 65 ℃.

In order to realize the heat preservation performance, the heat preservation storage and transportation box body 21 and the heat preservation storage and transportation box cover 22 of the food heat preservation storage and transportation box 2 are both of hollow structures, and a heat preservation layer is arranged in each hollow structure; the temperature increasing box body 11 of the food temperature increasing box 1 is of a hollow structure, and a heat insulating layer is arranged inside the hollow structure; the side surface of the bag body 31 of the food heat-preservation storage and transportation knapsack 3 comprises an inner layer, a middle heat-preservation layer and an outer layer which are arranged in sequence. For heat preservation needs, the product is hollow structure, and is filled with the heat preservation in hollow structure. The contact position of the bottom of the heat-insulating storage and transportation box cover 22 and the heat-insulating storage and transportation box body 21 is embedded with a sealing ring, the contact position of the bottom of the warming box cover 12 and the warming box body 11 is embedded with a sealing ring, and the sealing ring is made of food-grade silica gel materials. The bag body 31 and the bag cover 32 of the food heat preservation and storage knapsack 3 are sealed by a waterproof zipper. There are three ways thermal power can be transmitted: radiation, convection, and conduction. The inner container 4 of this application embodiment can the reflection heat radiation, and the thermal-insulated layer can block thermal conduction, and sealing washer and waterproof zipper can stop the thermal convection to can realize keeping warm for a long time.

For the effective application of space, two inner containers 4 are arranged in the heat-insulating storage and transportation box body 21 side by side; four inner containers 4 are placed in the warming box body 11, the inner containers 4 are placed side by side and stacked in two layers, and the arrangement is that the long edges of the two inner containers 4 are placed adjacently. Two inner containers 4 are stacked up and down in the bag body 31 of the food heat-preservation storage and transportation knapsack 3.

In order to increase the stability during transportation, as shown in fig. 11, a first fixing protrusion 221 is disposed on the insulation storage and transportation box cover 22, and a first fixing groove matched with the first fixing protrusion 221 is disposed on the bottom surface of the insulation storage and transportation box body; as shown in fig. 12, a second fixing protrusion 121 is disposed on the warming box cover 12, and a second fixing groove matched with the second fixing protrusion 121 is disposed on the bottom surface of the warming box body; preferably, the first fixing protrusion and the second protrusion are cross-shaped protrusions; the first fixing groove and the second fixing groove are cross-shaped grooves, and the cross-shaped grooves clamp the cross-shaped convex groove part and are riveted up and down, left and right. The first fixing protrusion 221 and the second fixing protrusion 121 are identical in shape and size, and the first fixing groove and the second fixing groove are identical in shape and size, so that the food heat-preservation storage and transportation box and the food warming box can be clamped and stacked simultaneously, stability in the transportation process is improved, when a vehicle transportation road passes through a bumpy road section, the food heat-preservation storage and transportation box and the food warming box are stacked more stably, and safe supply of food is guaranteed.

The heat-preservation storage and transportation box body 21 is movably connected with the heat-preservation storage and transportation box cover 22 through a hasp; the warming box body 11 and the warming box cover 12 are movably connected through a buckle. As shown in fig. 1 and fig. 2, the warming box body 11 and the heat preservation storage and transportation box body 21 are respectively provided with a handle; the warming box body 11 and the heat preservation storage and transportation box body 21 are provided with second concave platforms, handles are arranged in the second concave platforms, and the height of the handles attached to the warming box body 11 or the heat preservation storage and transportation box body 21 is not more than the depth of the second concave platforms.

The hasp, the handle and the tap of food warming box 1 and food heat preservation storage and transport case 2 all integrate in the within range of box outer wall, have reduced the whole volume of food warming box and food heat preservation storage and transport case 2, and the transport is easily more, and difficult emergence is damaged.

In a further preferred implementation manner of the embodiment of the application, the intermediate heat-insulating layer of the food heat-insulating storage and transportation knapsack 3 comprises two heat-insulating parts, and the two heat-insulating parts are arranged at intervals; in order to facilitate taking and placing of the inner container 4, the two heat preservation components have a movement range of 5-10 mm in the vertical direction. A first interval area of 40-60 mm is arranged between the two heat preservation components; the two heat preservation components have a moving range of 5-10 mm in the vertical direction. A second interval zone with the width of 40-80 mm is arranged between the lower edges of the heat preservation part and the side surfaces; and a third spacing zone with the width of 40-80 mm is arranged between the upper edges of the heat preservation parts and the side surfaces. As can be seen from fig. 5, the inner container 4 is not vertically as high for easy handling and storage, but is provided with an expanded portion 411 for handling, and in the heat-preservation, storage and transportation knapsack 3, the expanded portion 411 of the lower inner container 4 is provided at a position corresponding to the first compartment, and the expanded portion of the upper inner container 4 is provided at a position corresponding to the third compartment. In order to further increase the heat preservation efficiency of the food heat preservation storage and transportation knapsack 3, a temperature increasing component, a temperature sensor and a power supply are added to the food heat preservation storage and transportation knapsack 3, wherein the temperature increasing component is a strip-shaped temperature increasing belt and is arranged in a second interval zone of three side surfaces except the back surface of the knapsack body 31, and because the back surface part is tightly attached to the back of a user of the food heat preservation storage and transportation knapsack 3 in the using process of the food heat preservation storage and transportation knapsack 3 and has a certain temperature increasing and preserving effect, the strip-shaped temperature increasing belt is arranged in the second interval zone of the three side surfaces except the back surface of the knapsack body 31, and because the power supply is easily influenced by low temperature, the power supply is arranged in the second interval zone of the back surface of the knapsack body 31 and is attached to the back of the user of the food heat preservation storage and transportation knapsack 3, so that the heat preservation effect on batteries is achieved, and the performance of the batteries is prevented from being influenced by low temperature and deteriorated. Furthermore, a temperature sensor is positioned in the center of the rectangular bottom surface.

In summary, the above description will be described with reference to some of the structures of the food warming box, the food warming storage and transportation box, and the food warming storage and transportation knapsack for convenience. The food warming box 1, the food heat preservation and storage box 2 and the food heat preservation and storage knapsack 3 are all independent structures, and inner containers are commonly applied.

Although the present application has been described with reference to preferred embodiments, it is not intended to limit the scope of the claims, and many possible variations and modifications may be made by one skilled in the art without departing from the spirit of the application.

Claims (10)

1. An inner container, comprising:

the tray body is provided with an accommodating space, and the opening end of the tray body is provided with an expansion part extending outwards;

the edge of the serving tray cover is provided with an outward-turned outer edge, the outer edge is connected with the top of a circumferentially arranged vertical wall, the bottom of the vertical wall is connected with a circumferentially arranged transverse wall which extends towards the center of an area surrounded by the vertical wall, one side of the transverse wall, away from the vertical wall, is provided with a convex part protruding out of the transverse wall, and the distance between the top surface of the convex part and the transverse wall is smaller than the distance between the top edge of the vertical wall and the transverse wall;

part of the edge area of the protruding part is recessed to form a U-shaped recessed area formed by the protruding part and the transverse wall, the bottom edge of the recessed part of the protruding part is connected with the transverse wall, the protruding part is provided with a handle, and two ends of the handle are lapped on the tops of opposite side walls of the recessed area, so that fingers can be placed in the recessed area under the condition that the fingers grab the handle;

the top surface of the bulge is provided with a vent valve;

the fixing buckle is arranged on the side wall of the top of the serving tray body, so that the serving tray cover is fixed at the opening end of the serving tray body through the fixing buckle;

two ends of the lifting belt are respectively lapped on the opposite edges of the expansion part so as to lift the serving tray body through the lifting belt; wherein,

the serving tray cover is covered at the opening end of the serving tray body, the outer edge is lapped on the expansion part, the vertical wall is attached to the inner wall of the serving tray body, and a sealing ring is arranged outside the vertical wall; when the vertical wall is attached to the inner wall of the serving tray body, the sealing ring, the serving tray body and the serving tray cover enclose to form a closed space.

2. An inner container according to claim 1, further comprising two lugs, each of the two lugs being disposed diagonally to the extension portion, and two through holes being disposed diagonally to the extension portion, each of the two lugs being adapted to pass through the through hole and be slidable therein.

3. An inner container according to claim 1, wherein the number of said retaining tabs is two, and two of said retaining tabs are provided separately on the side walls of the serving tray on either side of the top thereof.

4. The inner container as claimed in claim 1, wherein the lifting strap is i-shaped, the i-shaped lifting strap comprising two transverse straps and a vertical strap connecting the two transverse straps, the ends of the transverse straps being bent into a hook shape toward the same side; the lifting belt is made of plastic materials with certain ductility, and the two ends of the transverse belt are correspondingly clamped on the two sides of the expansion part in the width direction of the serving tray body respectively.

5. An insulated food container comprising the inner container of any one of claims 1 to 4, and an insulated container body and an insulated container cover;

the heat-insulation storage and transportation box body and the heat-insulation storage and transportation box cover are both of hollow structures, and a heat-insulation layer is arranged inside each hollow structure; two inner containers are arranged in the heat-preservation storage and transportation box body side by side.

6. The heat-insulating food and storage and transportation box according to claim 5, further comprising a fixing frame, wherein the edge of the fixing frame is connected with the circumferential inner wall of the heat-insulating storage and transportation box body, two fixing frames are arranged on the fixing frame in the shape of the outer circumferential wall of the inner container, and the two inner containers are respectively arranged in the fixing frames, so that the expansion part of the inner container is overlapped on the fixing frames.

7. A food warming box comprising an inner container according to any one of claims 1 to 4, and a warming box body and a warming box cover;

an electric heating device is arranged in the warming box cover, the warming box body is of a hollow structure, and a heat insulation layer is arranged in the hollow structure; four inner containers are placed in the warming box body, and the inner containers are placed side by side and stacked in two layers.

8. The food warming box according to claim 7, wherein the electric heating device comprises a heating wire, the heating wire is attached to the inner wall of the warming box cover, a reflecting film is further arranged between the heating wire and the inner wall of the warming box cover, and the heating wire is connected with a power supply through a power interface or connected with a power supply battery through the power interface.

9. A knapsack for heat preservation, storage and transportation of food, characterized in that it comprises the inner container of any one of claims 1 to 4, a knapsack body and a knapsack assembly;

the backpack body comprises a backpack body and a backpack cover; the bag body is a cuboid surrounded by a rectangular bottom surface and 4 side surfaces, the shape of the bag cover is the same as that of the rectangular bottom surface, and the 4 side surfaces respectively comprise an inner layer, a middle heat-insulating layer and an outer layer which are sequentially arranged; two inner containers are stacked up and down in the bag body; the backpack assembly comprises shoulder straps and a waist support, and the shoulder straps and the waist support are fixedly arranged on the rear side face of the bag body.

10. The backpack for heat preservation, storage and transportation of food as claimed in claim 9, wherein the backpack body and the backpack cover are closed by a waterproof zipper, and a handle is provided on the top of the backpack body; the inner layer and the outer layer are both waterproof fabrics.

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