CN113200241B

CN113200241B - Packaging box with long refrigeration time

Info

Publication number: CN113200241B
Application number: CN202110526167.1A
Authority: CN
Inventors: 杨义之; 管越峰; 连升炯; 卢蝶; 鲁豪; 戚江浩
Original assignee: Xiamen Hexing Industrial Co ltd
Current assignee: Xiamen Hexing Industrial Co ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2023-05-12
Anticipated expiration: 2039-05-10
Also published as: CN113200242A; CN110228664B; CN113200242B; CN113200241A; CN110228664A

Abstract

The invention belongs to the technical field of packaging boxes, and particularly relates to a packaging box with long refrigeration time, which comprises a top cover, an outer box body, a reaction module and a storage box body, wherein in the use process of the packaging box, a freezing shell is subjected to freezing treatment firstly; meanwhile, in the reaction module designed in the invention, if the freezing shell and the freezing medium in the freezing block absorb heat and melt in the process of refrigerating the articles in the storage box, the reaction module is triggered by the change of the volume of the freezing medium, so that substances positioned at two sides of the isolation plate in the shell of the reaction module are contacted to generate chemical reaction, and the freezing shell and the freezing medium in the freezing block absorb heat to refrigerate; the refrigerating time of the packing box is improved.

Description

Packaging box with long refrigeration time

Technical Field

The invention belongs to the technical field of packaging boxes, and particularly relates to a packaging box with long refrigeration time.

Background

At present, the rapid development of the express delivery industry generally wraps a layer of ice blocks on the outer side of the express delivery object when the express delivery object needing refrigeration is transported, and foams are wrapped on the outer side of the ice blocks for heat preservation, but in the transportation process, the ice blocks can be gradually melted along with the time, refrigeration of the express delivery object can be invalid, the express delivery object is damaged by heat, the heat preservation time is short, the refrigerator is suitable for the express delivery industry, and the refrigerator with long heat preservation time is necessary.

The invention designs a packaging box with long refrigeration time to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a packaging box with long refrigeration time, which is realized by adopting the following technical scheme.

A long refrigeration time packaging box, characterized in that: the refrigerator comprises a top cover, an outer box body, a reaction module, a freezing shell, a storage box body and a freezing block, wherein the storage box body is arranged at the inner side of the outer box body and is positioned at the middle position of the outer box body; providing a storage space for articles to be refrigerated through the storage box body; the top cover is arranged on the upper side of the outer box body; the freezing shell is square, the lower side of the freezing shell is provided with a freezing block in the front, back, left and right directions respectively, the freezing block is hollow, and the freezing block is communicated with the freezing shell; the frozen block is made of soft materials; the freezing shell is arranged at the lower side of the top cover, and the four freezing blocks are matched with the space between the storage box body and the outer box body; the freezing shell and the four freezing blocks are provided with freezing media; in the use process of the packaging box, firstly, freezing treatment is needed to be carried out on the freezing shell, before freezing, freezing media in four freezing blocks are firstly flowed back into the freezing shell, and as the freezing blocks are made of soft materials, the four freezing blocks can be pressed into a group after being flowed back into the freezing shell and placed on the freezing shell, then the freezing shell is placed in a refrigerator, and the freezing shell is frozen, when the freezing shell is frozen, the freezing media in the four freezing blocks are flowed back into the freezing shell, and then the four freezing blocks are pressed into a group and placed on the freezing shell, so that the space of the refrigerator is occupied by the freezing shell during freezing, and the freezing of the freezing shell is facilitated; the frozen block is made of soft materials, and the function of the frozen block is to facilitate the compression of the frozen block after the freezing medium in the frozen block flows back into the freezing shell.

The reaction module is mounted within the freezing housing.

The reaction module has two substances which are subjected to endothermic reaction after contact.

As a further improvement of the technology, a plurality of heat conducting fins are uniformly arranged around the reaction module, and the heat conducting fins have the function of facilitating the reaction module to absorb the heat of the freezing medium in the freezing shell so as to enable the freezing medium to be cooled as soon as possible.

As a further improvement of the technology, the reaction module comprises a shell, a trigger block, a first support, a trigger rod, a trigger triangular block, a drive triangular block, a return spring, a separation plate, a return spring, a sliding plate, V-shaped clamping strips, V-shaped grooves, a fixed plate and a communication hole, wherein one end of the shell is an open end, the upper end face and the lower end face in the shell are symmetrically provided with the V-shaped clamping strips, and the shell is arranged on the upper side face in a freezing shell; the isolation plate is provided with a communication hole and is arranged on the inner side of the shell; a trigger block is arranged at one end of the trigger rod, a trigger triangular block is arranged at the other end of the trigger rod, the trigger rod is arranged at the inner side of the shell through a first support, the trigger block is matched with a communication hole on the isolation plate, two V-shaped grooves are symmetrically formed in the upper end face and the lower end face of the sliding plate, a sliding groove is formed in one side face of the sliding plate, the sliding plate is arranged at the inner side of the shell through sliding fit, and the two V-shaped grooves are matched with V-shaped clamping strips arranged on the shell; limiting the sliding block in an initial state so that the reset spring has a certain precompression force; two return springs are symmetrically arranged between the sliding plate and the isolation plate; a fixed plate is arranged on one side of the driving triangular block, the driving triangular block is arranged on the sliding plate through sliding fit of the fixed plate and the sliding groove, and a return spring is arranged between the fixed plate and the sliding groove; the driving triangular block is matched with the triggering triangular block; when the freezing shell is in a freezing state, a freezing medium in the freezing shell expands and extrudes the sliding plate, the sliding plate extrudes the driving triangular block, meanwhile, the sliding plate extrudes the reset spring, the reset spring which is in a compressed state originally is continuously pressed, the driving triangular block is extruded to extrude the triggering triangular block, the triggering triangular block drives the triggering block to be tightly attached to the communication hole on the isolation plate through the triggering triangular block, the triggering triangular block reversely extrudes the driving triangular block, the driving triangular block slides upwards after being subjected to bidirectional extrusion, in the sliding process of the driving triangular block, after the driving triangular block is separated from the triggering triangular block, the driving triangular block moves downwards under the action of the reset spring, so that the back surface of the driving triangular block is tightly attached to the back surface of the triggering triangular block, in the state, the sliding plate contacts with the triggering triangular block to limit the triggering triangular block, the triggering block is prevented from being detached from the communication hole on the isolation plate, and meanwhile, the V-shaped clamping strip on the shell body and the V-shaped clamping strip on the sliding block which is in an original matching state can be destroyed in the moving process; after the freezing medium in the freezing shell absorbs heat and melts, the volume of the freezing medium is reduced, the freezing medium in the freezing shell flows into the freezing block, the extrusion of the freezing medium in the freezing shell to the sliding block is disappeared, in the state, the sliding block moves reversely towards one side far away from the isolation plate through the reset spring, the sliding block moves and drives the trigger triangular block to move through driving the triangular block, the trigger triangular block moves and drives the trigger rod to move, the trigger rod moves and drives the trigger block to be separated from the communication holes on the isolation plate, so that two sides of the isolation plate are communicated, substances positioned at two sides of the isolation plate are contacted and react to generate heat absorbing substances, and the freezing medium in the freezing shell and the freezing block is subjected to heat absorption to refrigerate; two substances which are contacted and then subjected to endothermic reaction are arranged at two sides of the isolation plate in the shell.

As a further improvement of the technology, two guide grooves are symmetrically formed on two sides of the sliding groove, two guide blocks are symmetrically arranged on two sides of one end of the fixed plate, and one end of the fixed plate, on which the guide blocks are arranged, is arranged in the sliding groove through the cooperation of the two guide blocks and the two guide grooves; the fixing plate is guided by the cooperation of the two guide blocks and the two guide grooves.

As a further improvement of the technology, two guide grooves are symmetrically formed in two side surfaces of the inner side of the shell, two guide blocks are symmetrically arranged on two sides of the sliding plate, the sliding plate is arranged on the inner side of the shell through the matching of the two guide blocks and the two guide grooves, and the sliding plate is guided through the matching of the two guide blocks and the two guide grooves.

As a further improvement of the present technology, the return spring is a compression spring.

As a further improvement of the technology, the freezing medium in the freezing shell and the four freezing blocks is water, so that the cost is lower, and in addition, the freezing medium can also be the freezing medium with fluidity in the existing refrigeration bag.

As a further improvement of the technology, the outer box body and the top cover are internally provided with foam heat insulation layers, and the foam heat insulation layers have the function of insulating the freezing shell and the freezing blocks.

As a further improvement of the technology, the shell is internally provided with saltpeter and water respectively at two sides of the isolation plate; the reaction of the saltpeter and water can absorb heat, and the reaction product is harmless to human body.

Compared with the traditional packing box technology, the packing box designed by the invention firstly needs to carry out freezing treatment on the freezing shell, when the freezing shell is subjected to freezing treatment, freezing media in four freezing blocks are flowed back into the freezing shell, then the four freezing blocks are pressed into a group and placed on the freezing shell, so that the space occupied by the freezing shell in freezing is reduced, and the freezing shell is convenient to freeze; meanwhile, in the reaction module designed in the invention, if the freezing shell and the freezing medium in the freezing block absorb heat and melt in the process of refrigerating the articles in the storage box, the reaction module is triggered by the change of the volume of the freezing medium, so that substances positioned at two sides of the isolation plate in the shell of the reaction module are contacted to generate chemical reaction, and the freezing shell and the freezing medium in the freezing block absorb heat to refrigerate the substances again, thereby improving the refrigerating time of the packaging box.

Drawings

Fig. 1 is a schematic view of the overall component appearance.

Fig. 2 is a schematic diagram of the overall component distribution.

Fig. 3 is a schematic diagram showing the internal structure distribution of the whole part.

FIG. 4 is a schematic diagram of a reaction module installation.

Fig. 5 is a schematic view of a storage case installation.

Fig. 6 is a schematic diagram of a frozen block.

Fig. 7 is a schematic view of the structure of the top cover.

FIG. 8 is a schematic diagram of the reaction module distribution.

Fig. 9 is a schematic view of a freezing shell structure.

FIG. 10 is a schematic view of the structure of a reaction module.

Fig. 11 is a schematic view of a housing structure.

Fig. 12 is a schematic view of a sliding plate structure.

Fig. 13 is a trigger block mounting schematic.

Fig. 14 is a schematic view of a driving triangular block structure.

Fig. 15 is a schematic diagram of a spacer structure.

Reference numerals in the figures: 1. a top cover; 2. an outer case; 4. a heat conductive sheet; 5. a reaction module; 6. freezing the shell; 7. a storage box body; 8. a housing; 9. a trigger block; 10. a first support; 11. a trigger lever; 12. triggering the triangular block; 13. driving the triangular block; 14. a return spring; 15. a partition plate; 22. freezing the block; 23. a return spring; 24. a sliding plate; 25. a guide groove; 26. v-shaped clamping strips; 27. a sliding groove; 28. a guide groove; 29. a guide block; 30. a V-shaped groove; 33. a fixing plate; 34. a guide block; 35. the communication hole.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples or figures are illustrative of the invention and are not intended to limit the scope of the invention.

As shown in fig. 1 and 2, the device comprises a top cover 1, an outer box body 2, a reaction module 5, a freezing shell 6, a storage box body 7 and a freezing block 22, wherein as shown in fig. 5, the storage box body 7 is arranged on the inner side of the outer box body 2 and is positioned in the middle position of the outer box body 2; a storage space is provided for articles to be refrigerated through the storage box body 7; as shown in fig. 3 and 7, the top cover 1 is installed at the upper side of the outer case 2; as shown in fig. 6 and 9, the freezing shell 6 is square, the lower side of the freezing shell 6 is respectively provided with a freezing block 22 in four directions of front, back, left and right, the freezing block 22 is hollow, and the freezing block 22 is communicated with the freezing shell 6; the frozen block 22 is a soft material; as shown in fig. 3, the freezing shell 6 is installed at the lower side of the top cover 1, and four freezing blocks 22 are matched with spaces between the storage box 7 and the outer box 2; the freezing shell 6 and the four freezing blocks 22 are provided with freezing media; in the use process of the packaging box, firstly, the freezing shell 6 needs to be frozen, before freezing, freezing media in the four freezing blocks 22 are flowed back into the freezing shell 6, and as the freezing blocks 22 are made of soft materials, after the freezing media in the freezing blocks 22 are flowed back into the freezing shell 6, the four freezing blocks 22 can be pressed into a group and placed on the freezing shell 6, and then the freezing shell 6 is placed in a refrigerator to perform freezing treatment on the freezing shell 6; whereas the freezing block 22 of the present invention is a soft material, the function of which is to facilitate compression of the freezing block 22 after the freezing medium in the freezing block 22 flows back into the freezing housing 6.

As shown in fig. 3, the reaction module 5 is installed in the freezing housing 6.

The reaction module 5 has two substances that react endothermically after contact.

To sum up:

the beneficial effect of the design of the invention is that: in the use process of the packing box, firstly, the freezing shell 6 needs to be frozen, when the freezing shell 6 is frozen, the freezing medium in the four freezing blocks 22 is flowed back into the freezing shell 6, and then the four freezing blocks 22 are pressed into a group and placed on the freezing shell 6, so that the space occupied by the freezing shell 6 in freezing is reduced, and the freezing shell 6 is convenient to freeze; meanwhile, in the reaction module 5 designed in the invention, if the freezing medium in the freezing shell 6 and the freezing block 22 absorbs heat and melts in the process of refrigerating the articles in the storage box 7, the reaction module 5 is triggered by the change of the volume of the freezing medium, so that substances positioned at two sides of the isolation plate 15 in the shell 8 of the reaction module 5 are contacted and chemically reacted to generate heat absorbing substances, and the heat absorbing substances absorb the freezing medium in the freezing shell 6 and the freezing block 22 to refrigerate the substances again; the refrigerating time of the packing box is improved.

As shown in fig. 2 and 4, a plurality of heat conductive sheets 4 are uniformly installed around the reaction module 5, and the heat conductive sheets 4 serve to facilitate the absorption of the temperature of the freezing medium in the freezing housing 6 by the reaction module 5.

As shown in fig. 4 and 8, the reaction module 5 includes a housing 8, a trigger block 9, a first support 10, a trigger rod 11, a trigger triangular block 12, a driving triangular block 13, a return spring 14, a partition plate 15, a return spring 23, a sliding plate 24, a V-shaped clamping bar 26, a V-shaped groove 30, a fixing plate 33, and a communication hole 35, wherein, as shown in fig. 11, one end of the housing 8 is an open end, V-shaped clamping bars 26 are symmetrically installed on the upper and lower end surfaces in the housing 8, and as shown in fig. 4, the housing 8 is installed on the upper side surface in the freezing housing 6; as shown in fig. 15, the partition plate 15 is provided with a communication hole 35, and as shown in fig. 10, the partition plate 15 is installed inside the housing 8; as shown in fig. 13, a trigger block 9 is installed at one end of the trigger rod 11, a trigger triangular block 12 is installed at the other end of the trigger rod 11, as shown in fig. 10, the trigger rod 11 is installed inside the casing 8 through a first support 10, the trigger block 9 is matched with a communication hole 35 on the isolation plate 15, as shown in fig. 12, two V-shaped grooves 30 are symmetrically formed on the upper and lower end surfaces of the sliding plate 24, a sliding groove 27 is formed on one side surface of the sliding plate 24, as shown in fig. 10, the sliding plate 24 is installed inside the casing 8 through sliding fit, as shown in fig. 4, the two V-shaped grooves 30 are matched with V-shaped clamping bars 26 installed on the casing 8; limiting the sliding block in an initial state so that the return spring 23 has a certain precompression force; as shown in fig. 10, two return springs 23 are symmetrically installed between the sliding plate 24 and the partition plate 15; as shown in fig. 14, a fixed plate 33 is mounted on one side of the driving triangle 13, as shown in fig. 10, the driving triangle 13 is mounted on the sliding plate 24 through the sliding fit of the fixed plate 33 and the sliding groove 27, and a return spring 14 is mounted between the fixed plate 33 and the sliding groove 27; the driving triangular block 13 is matched with the triggering triangular block 12; when the freezing shell 6 is in a freezing state, a freezing medium in the freezing shell 6 expands and extrudes the sliding plate 24, the sliding plate 24 extrudes the driving triangular block 13, meanwhile, the sliding plate 24 extrudes the reset spring 23, the reset spring 23 which is in an original compressed state is continuously compressed, the driving triangular block 13 is extruded to extrude the triggering triangular block 12, the triggering triangular block 12 drives the triggering block 9 to be tightly attached to the communication hole 35 on the isolation plate 15 through the triggering triangular block 12, the triggering triangular block 12 reversely extrudes the driving triangular block 13, the driving triangular block 13 slides upwards after being subjected to bidirectional extrusion, in the sliding process of the driving triangular block 13, the driving triangular block 13 moves downwards under the action of the reset spring 14 after the driving triangular block 13 is separated from the triggering triangular block 12, the back surface of the driving triangular block 13 is tightly attached to the back surface of the triggering triangular block 12, in this state, the sliding plate 24 contacts with the triggering triangular block 12 to limit the triggering triangular block, the triggering triangular block 9 is prevented from being detached from the communication hole 35 on the isolation plate 15, and meanwhile, the sliding block is destroyed on the V-shaped groove of the shell 26 in the moving state and the V-shaped groove of the clamping bar 8 is damaged; after the freezing medium in the freezing shell 6 absorbs heat and melts, the volume of the freezing medium is reduced, the freezing medium in the freezing shell 6 flows into the freezing block 22 at the moment, the compression of the freezing medium in the freezing shell 6 to the sliding block is disappeared, in this state, the sliding block moves reversely towards one side far away from the isolation plate 15 through the reset spring 23, the sliding block moves to drive the trigger triangular block 12 to move through the driving triangular block 13, the trigger triangular block 12 moves to drive the trigger rod 11 to move, the trigger rod 11 moves to drive the trigger block 9 to be separated from the communication hole 35 on the isolation plate 15, two sides of the isolation plate 15 are communicated, substances on two sides of the isolation plate 15 are contacted and react, heat absorbing substances are generated, and the freezing medium in the freezing shell 6 and the freezing block 22 absorbs heat to freeze the substances again; meanwhile, the space originally occupied by the freezing medium flowing into the freezing block 22 in the shell 8 can be made up by the movement of the sliding shell, so that the heat transfer efficiency is improved; two substances which are contacted and then subjected to endothermic reaction are arranged at two sides of the isolation plate 15 in the shell 8.

As shown in fig. 12, two guide grooves 28 are symmetrically formed on both sides of the sliding groove 27, as shown in fig. 14, two guide blocks 34 are symmetrically mounted on both sides of one end of the fixing plate 33, and as shown in fig. 10, one end of the fixing plate 33, on which the guide blocks 34 are mounted, is mounted in the sliding groove 27 through the cooperation of the two guide blocks 34 and the two guide grooves 28; the fixing plate 33 is guided by the cooperation of the two guide blocks 34 with the two guide grooves 28.

As shown in fig. 11, two guide grooves 25 are symmetrically formed on both inner sides of the housing 8, as shown in fig. 12, two guide blocks 29 are symmetrically mounted on both sides of the sliding plate 24, as shown in fig. 10, the sliding plate 24 is mounted on the inner side of the housing 8 by the cooperation of the two guide blocks 29 and the two guide grooves 25, and the sliding plate 24 is guided by the cooperation of the two guide blocks 29 and the two guide grooves 25.

The return spring 14 is a compression spring.

The freezing medium in the freezing shell 6 and the four freezing blocks 22 is water, which has low cost, and the freezing medium may be a freezing medium having fluidity in the existing refrigerating bag.

The outer box and the top cover 1 are internally provided with foam heat insulation layers, and the foam heat insulation layers play a role in insulating the freezing shell 6 and the freezing blocks 22.

The return spring 23 is a compression spring.

The shell 8 is provided with saltpeter and water at two sides of the isolation plate 15; the reaction of the saltpeter and water can absorb heat, and the reaction product is harmless to human body.

The specific working flow is as follows: when the packaging box designed by the invention is used, in the use process, firstly, the top cover 1 is turned over and placed, at the moment, freezing media in the four freezing blocks 22 are reversely flowed into the freezing shell 6, because the freezing blocks 22 are soft materials, after the freezing media in the freezing blocks 22 are reversely flowed into the freezing shell 6, the four freezing blocks 22 can be pressed into a group and placed on the freezing shell 6, then, the freezing shell 6 is placed in a refrigerator to carry out freezing treatment on the freezing shell 6, after freezing is finished, the freezing shell 6 is taken out and placed on the upper side of the storage box body 7, namely, the storage of articles is finished, in the use process, if the freezing media in the freezing shell 6 absorb heat, the extrusion of the sliding blocks is eliminated, meanwhile, the freezing media in the freezing shell 6 flow into the freezing blocks 22 due to the action of gravity, in the state, the sliding blocks reversely move towards one side far away from the isolation plate 15, the sliding blocks move and trigger triangular blocks 12 are driven by driving triangular blocks 13, the trigger triangular blocks 12 are driven by driving triangular blocks 11 to move, the trigger triangular blocks 11 and the trigger the two sides of the isolation plate 15 are driven by the trigger triangular blocks, and the trigger the two side of the isolation plate 15 are driven by the trigger blocks to move, and the two isolation plates 15 are contacted with each other side 15, and the trigger the two sides of the trigger the two isolation plates 15 are contacted with the trigger the two sides 15, and the trigger the two sides of the trigger plates 15 to move 15 and are contacted with the trigger the two sides 15, and the trigger plates 15, and the trigger the refrigerating plates 15, and are placed; the refrigerating time of the packaging box is prolonged; when the article needs to be taken out, the top cover 1 and the freezing shell 6 are opened to take out the article.

Claims

1. A long refrigeration time packaging box, characterized in that: the refrigerator comprises a top cover, an outer box body, a reaction module, a freezing shell, a storage box body and a freezing block, wherein the storage box body is arranged at the inner side of the outer box body and is positioned at the middle position of the outer box body; the top cover is arranged on the upper side of the outer box body; the freezing shell is square, the lower side of the freezing shell is provided with a freezing block in the front, back, left and right directions respectively, the freezing block is hollow, and the freezing block is communicated with the freezing shell; the frozen block is made of soft materials; the freezing shell is arranged at the lower side of the top cover, and four freezing blocks are positioned in a space between the storage box body and the outer box body; the freezing shell and the four freezing blocks are provided with freezing media;

the reaction module is arranged in the freezing shell;

the reaction module comprises a shell, a trigger block, a first support, a trigger rod, a trigger triangular block, a driving triangular block, a return spring, a partition plate, a return spring, a sliding plate, V-shaped clamping strips, V-shaped grooves, a fixed plate and communication holes, wherein one end of the shell is an open end, the upper end face and the lower end face in the shell are symmetrically provided with the V-shaped clamping strips, and the shell is arranged on the upper side face in a freezing shell; the isolation plate is provided with a communication hole and is arranged on the inner side of the shell; a trigger block is arranged at one end of the trigger rod, a trigger triangular block is arranged at the other end of the trigger rod, the trigger rod is arranged at the inner side of the shell through a first support, the trigger block is matched with a communication hole on the isolation plate, two V-shaped grooves are symmetrically formed in the upper end face and the lower end face of the sliding plate, a sliding groove is formed in one side face of the sliding plate, the sliding plate is arranged at the inner side of the shell through sliding fit, and the two V-shaped grooves are matched with V-shaped clamping strips arranged on the shell; two return springs are symmetrically arranged between the sliding plate and the isolation plate; a fixed plate is arranged on one side of the driving triangular block, the driving triangular block is arranged on the sliding plate through sliding fit of the fixed plate and the sliding groove, and a return spring is arranged between the fixed plate and the sliding groove; the driving triangular block is matched with the triggering triangular block; two substances which are in contact with each other and generate endothermic reaction are arranged on two sides of the isolation plate in the shell, and the product is harmless to human body;

the return spring is a compression spring;

the freezing medium in the freezing shell and the four freezing blocks is water;

the outer box body and the top cover are internally provided with foam heat-insulating layers;

the return spring is a compression spring;

the shell is internally provided with saltpeter and water at two sides of the isolation plate respectively.

2. A long refrigerated packaging case as claimed in claim 1 wherein: a plurality of heat conductive sheets are uniformly installed around the reaction module.

3. A long refrigerated packaging case as claimed in claim 1 wherein: two guide grooves are symmetrically formed in two sides of the sliding groove, two guide blocks are symmetrically arranged in two sides of one end of the fixing plate, and one end of the fixing plate, provided with the guide blocks, is arranged in the sliding groove through the cooperation of the two guide blocks and the two guide grooves.

4. A long refrigerated packaging case as claimed in claim 1 wherein: two guide grooves are symmetrically formed in the two side faces in the shell, two guide blocks are symmetrically arranged on the two sides of the sliding plate, and the sliding plate is arranged on the inner side of the shell through the matching of the two guide blocks and the two guide grooves.