CN212244567U

CN212244567U - But reuse's gas column bag for cold chain

Info

Publication number: CN212244567U
Application number: CN202021856889.0U
Authority: CN
Inventors: 戴增贤; 尹海云
Original assignee: Hangzhou Air Box Packaging Co ltd
Current assignee: Hangzhou Air Box Packaging Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-12-29
Anticipated expiration: 2030-08-31

Abstract

The utility model provides a reusable cold chain air column bag, the bag body is composed of a plurality of film layers, a first heat sealing seam, a second heat sealing seam, a plurality of rows of folding seams and a fluid filling area; a plurality of single-row inflatable columns on the upper layer and a plurality of single-row inflatable columns on the lower layer are respectively formed among the plurality of film layers; the fluid filling area of the bag body comprises a plurality of one-way water filling valves positioned at the upper parts of the single-row water filling columns and a plurality of one-way inflation valves positioned at the upper parts of the inflation columns; the water inlet direction of the water inlets of the one-way water filling valves in the same row is opposite to the air inlet direction of the air inlets of the one-way air filling valves. The utility model discloses the single row of refrigeration action fills the food article surface that the column large tracts of land cover transported, perhaps can transmit the low temperature of low temperature single row water column for transported object gradually, reduces gas column bag and ice bag cold chain simultaneously and transports the case volume that transports that the in-process took, improves the space utilization who transports the food article that the case loads transported to repeatedly usable.

Description

But reuse's gas column bag for cold chain

Technical Field

The utility model belongs to the technical field of the air packing bag, concretely relates to but reuse's gas column bag for cold chain.

Background

In recent years, the development of electricity merchants is rapid, and the online shopping is popular, gradually develops and occupies an important position in the electricity merchants. The packaging material is used for transportation and packaging of fresh cold chain logistics and has high heat preservation, heat insulation and impact resistance. The proportion of the refrigeration insulation vehicle and the refrigeration ship in the whole transportation is very small, and under the condition that some key logistics nodes lack refrigeration and cold storage facilities, the package needs to bear the expensive task of maintaining the low-temperature freshness of the contents and reducing the loss. At present, the foam box widely used in China is made of polystyrene materials and is characterized in that the foam box is difficult to degrade and recycle.

The inflatable bag is an application of the inflatable cushion based on products, and is a bag-shaped product which is formed by a plurality of continuous gas column monomers made of PE films through certain design and can contain articles through heat sealing, is mainly used for product protection packaging, and can achieve the purpose of protecting the product by reducing the impact acceleration in the transportation process. The PE film adopted by the packaging bag can be effectively recycled, white pollution to the environment cannot be caused, and meanwhile, the inflatable gas is used as air, so that the packaging bag is cheap and easy to obtain, has good protection performance, and gradually receives wide e-commerce and express packaging applications. However, in the prior art, when fragile food articles are transported by the cold chain, the gas column bag and the frozen ice bag are required to be placed separately, the volume occupied by transportation is increased, the ice bag does not completely cover the surface of the food articles, the refrigeration effect is reduced, the ice bag and the gas column bag are discarded after being used up and cannot be reused, and therefore, the gas column bag for the cold chain is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model is directed to the above-mentioned defect, the utility model provides a can improve the cold-stored effect of transporting the in-process, make the great area of ice of refrigeration effect cover the food article surface that transports, perhaps can transmit the low temperature of low temperature list water bag for transported object gradually, reduce gas column bag and the ice bag cold chain simultaneously and transport the case volume that transports that the in-process took, improve the space utilization who transports the food article that the case loaded and transported, can repeat to freeze the gas column bag for the reuse's cold chain of back inflatable use.

The utility model provides a following technical scheme: a reusable air column bag for a cold chain comprises a bag body, wherein the bag body consists of a plurality of film layers, a first heat sealing seam, a second heat sealing seam, a plurality of rows of folding seams and a fluid filling area, wherein the first heat sealing seam and the second heat sealing seam are respectively arranged on the left side and the right side of the bag body;

a plurality of rows of folding seams are arranged at intervals in the bag body, so that a plurality of upper-layer single-row inflatable columns and a plurality of lower-layer single-row inflatable columns are formed among the plurality of film layers respectively;

the left side and the right side of the bag body are respectively provided with a first heat sealing seam and a second heat sealing seam, so that the plurality of film layers are tightly connected to form a closed bag body;

the fluid filling area of the bag body comprises a plurality of one-way water filling valves positioned at the upper parts of the single-row water filling columns and a plurality of one-way inflation valves positioned at the upper parts of the inflation columns;

the unidirectional water filling valve comprises a water inlet positioned on the first film layer, and a first sealing strip and a second sealing strip which are positioned on two sides of the arc-shaped elastic sheet and positioned on the lower part of the water inlet;

the arc-shaped elastic sheet is arched upwards;

the first sealing strip and the second sealing strip are axially symmetrical about the middle point of the water inlet and are respectively clamped and sealed with the two ends of the arc-shaped elastic sheet;

the one-way inflation valve comprises an air inlet positioned on the second film layer and a one-way check valve;

the water inlet direction of the water inlets of the one-way water filling valves in the same row is opposite to the air inlet direction of the air inlets of the one-way air filling valves.

Further, the first sealing strip with the first sealing strip joint end of arc flexure strip is for having the arc joint end of undercut, the second sealing strip with the second sealing strip joint end of arc flexure strip is the arc joint end of undercut.

Further, the number of the plurality of thin film layers is two, the plurality of thin film layers comprise a first thin film layer, a second thin film layer and a third thin film layer, and the third thin film layer is positioned between the first thin film layer and the second thin film layer; form a plurality of single row of water columns of inflating of upper strata between first thin layer and the third thin layer, form a plurality of single row of lower floor between third thin layer and the second thin layer and inflate the post.

Further, the quantity of a plurality of thin layers is a plurality of, a plurality of thin layers include first thin layer, second thin layer, third thin layer and fourth thin layer, the fourth thin layer with third thin layer zonulae occludens, form a plurality of single columns of inflating in the upper strata between first thin layer and the third thin layer, form a plurality of single columns of inflating in the lower floor between fourth thin layer and the second thin layer.

Further, the third film layer and the fourth film layer are fixedly connected through heat sealing, or detachably connected through gum or adhesive non-woven fabrics.

Furthermore, the upper part of the water inlet on the first film layer is also provided with a sealing strip which can be repeatedly pasted.

Furthermore, a plurality of heat-sealing folding points are arranged on the single-row water-filled column and the single-row air-filled column of the bag body, and the heat-sealing folding points divide the single-row water-filled column and the single-row air-filled column into a multi-section foldable structure;

the heat-seal folding points seal all the multilayer films forming the single-row inflatable columns and the single-row inflatable columns into one point; or the single column of the water-filled columns and the single column of the multi-layer films are separately sealed into a point between every two adjacent films, and a plurality of heat-sealing folding points are arranged in the vertical direction of the overlapped planes of the same column of the multi-layer films.

Further, when a plurality of heat-seal folding points are arranged in the vertical direction of the multilayer film overlapping plane, the number of the heat-seal folding points of the single-row inflatable column is larger than that of the single-row inflatable column, or the number of the heat-seal folding points of the single-row inflatable column is equal to that of the single-row inflatable column.

Furthermore, the heat-seal folding point is oval, and the length direction of the heat-seal folding point is vertical to the length direction of the single-row inflatable columns and the length direction of the single-row inflatable columns.

Furthermore, a water passing channel is reserved between the two ends of the long diameter of the heat-sealing folding point and the side wall where the single row of water filling columns are located; and an air passing channel is reserved between the two ends of the long diameter of the heat-sealing folding point and the side wall where the single row of inflatable columns are located.

The utility model has the advantages that:

1. the utility model provides a first heat seals seam and second heat between the multilayer film of the bag body and seals seam and folding seam formation and have the parallel single-row water column of inflating of multiseriate on upper strata, the parallel single-row gas column of multiseriate on lower floor, water inlet and air inlet through relative setting, can fill water and aerify single-row water column of inflating and single-row gas column when using, required time and syntropy when admitting air and intaking when having saved production, admit air and the water inlet can not be in the cost of the extra PE membrane bag body material of needs that section same position brought.

2. Through setting the single-row water-filled columns with multiple parallel rows and the single-row air-filled columns with multiple parallel rows into an integrated design, and having a one-way water-filled valve and a one-way air-filled valve, the liquid can not overflow after water filling and air filling, good low-temperature refrigeration effect can be guaranteed under the condition that objects brought by collision are cracked, incomplete or damaged, and dual requirements of cold chain nondestructive long-distance transportation are guaranteed. When refrigeration is not needed, the air column bag can be independently inflated, and the anti-collision damage effect is the same as that of a common inflated air column bag; after filling water and inflating, also can get into the water inlet through utilizing the slender object that does not have destruction arc elastic component, make arc elastic component undercut or straight, and then make arc elastic component and the first sealing strip joint end and the second sealing strip joint end that have the arc joint of undercut at both ends, and then discharge the water in the parallel single-row water column of inflating of multiseriate, when having cold chain long-distance transport's needs, rethread filling head stretches into the water inlet, after freezing or cold-stored, used repeatedly after filling water.

3. By arranging a plurality of heat-sealing folding points between the single-row inflatable column and the multilayer film of the inflatable column, the cold chain transportation device can be conveniently used according to different cold chain transportation requirements, the single-row inflatable column and the single-row inflatable column are folded to ensure the cold storage effect in cold chain transportation of fresh, fruits, vegetables, dairy products and medical products stored at low temperature which need to be transported in cold chain transportation in an all-round covering way, and a plurality of heat-seal folding points are arranged between different multilayer films forming the single-row water-filled columns and the air-filled columns in the vertical direction of the overlapping plane of the multilayer films at one heat-seal folding point, so that the folding points of the single-row water-filled columns are further effectively ensured to be separated from the folding points of the single-row air-filled columns, and a layer which is used for cold storage and has a low-temperature storage effect and is equivalent to an ice bag is more tightly wound around an article to be subjected to cold chain transportation, thereby further improving the low-temperature storage effect.

4. The utility model provides a heat sealing is carried out between the first film layer, the second film layer, the fourth film layer and the third film layer of the bag body through heat sealing folding points between every two adjacent film layers, and a plurality of single-row water-filled columns can be arranged according to different application scenes, and the number of the heat sealing folding points is the same or different;

the columns in different rows can be provided with different numbers of heat-seal folding points, the columns in the same row are arranged, when one is arranged in the vertical direction of the multilayer film overlapped plane at the heat-seal folding point, the heat-seal folding points in the vertical direction of the single row of water-filled columns and the single row of water-filled columns in the same row are different, so that the single row of water-filled columns is further attached to the articles, and further the single row of air-filled columns has better refrigeration effect, and the single row of air column bags have fewer sections, have larger collision rebound force and better anti-collision effect.

Or the single-row inflatable columns and the single-row inflatable columns in the same row have more heat-seal folding points and are tightly wrapped by the articles; the single-row water-filled column has fewer heat-sealing folding points and fewer sections and is positioned on the outer layer far away from the articles, so that after the articles are wrapped by the gas column bags, the temperature of the single-row gas column bags with the refrigeration effect on the outer layer is reduced at lower temperature, and the low temperature is gradually transferred to the articles through the single-row gas column bags, so that the articles cannot be subjected to huge temperature change immediately, and further frostbite of fresh fruits and vegetables and the occurrence of the condition of the inactivated lamp of medical reagents are caused.

Drawings

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 is a front overall schematic view of a reusable cold chain air column bag provided in embodiments 1-2 of the present invention;

FIG. 2 is a reverse side overall view of a reusable cold chain air column bag according to embodiments 1-2 of the present invention

Fig. 3 is a schematic side sectional view of a reusable cold chain air column bag according to embodiment 1 of the present invention;

fig. 4 is a schematic side sectional view of a reusable cold chain air column bag according to embodiment 2 of the present invention;

fig. 5 is an enlarged schematic view of a structure of a one-way water filling valve of a reusable cold chain air column bag provided in embodiments 1-2 of the present invention;

fig. 6 is an enlarged schematic view of the structure of the one-way inflation valve of the reusable cold chain air column bag according to embodiments 1-2 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-3, the reusable air column bag for cold chain provided in this embodiment includes a bag body 1, where the bag body 1 is composed of a first film layer 2, a second film layer 3, a third film layer 4 located between the first film layer 2 and the second film layer 3, a first heat-sealed seam 1-1 and a second heat-sealed seam 1-2 respectively disposed at the left and right sides of the bag body 1, a plurality of rows of folding seams 1-3, and fluid-filled regions 1-4;

as shown in fig. 3, a plurality of lines of folding seams 1-3 are arranged at intervals in the bag body, so that a plurality of upper single-line inflatable columns 5 are formed between the first film layer 2 and the third film layer 4, and a plurality of lower single-line inflatable columns 6 are formed between the third film layer 4 and the second film layer 3;

as shown in fig. 1, the left and right sides of the bag body 1 are respectively provided with a first heat seal seam 1-1 and a second heat seal seam 1-2, so that the first film layer 2, the second film layer 3 and the third film layer 4 positioned between the first film layer 2 and the second film layer 3 are tightly connected to form a closed bag body 1, so that a plurality of single-row inflatable columns 5 and a plurality of single-row inflatable columns 6 form an enclosure body, namely the closed bag body 1 wraps fresh goods needing cold chain transportation or easily fermented milk, fruits, vegetables, meat, seafood and the like or medical medicaments needing cold chain transportation.

As shown in FIG. 3, the fluid-filled region 1-4 of the bag body 1 comprises a plurality of one-way water-filled valves 5-1 positioned above the single-row water-filled columns 5 and a plurality of one-way air-filled valves 6-1 positioned above the air-filled columns 6;

as shown in fig. 3 and 5, the unidirectional water filling valve 5-1 comprises a water inlet 2-1 positioned on the first film layer 2, a first sealing strip 2-3 and a second sealing strip 2-4, wherein the arc-shaped elastic sheet 2-2 positioned at the lower part of the water inlet 2-1 is positioned at two sides of the arc-shaped elastic sheet 2-2; the arc-shaped elastic sheet 2-2 is arched upwards; the first sealing strip 2-3 and the second sealing strip 2-4 are axially symmetrical about the middle point of the water inlet and are respectively clamped and sealed with the two ends of the arc-shaped elastic sheet 2-2; the clamping ends 2-31 of the first sealing strip 2-3 and the arc-shaped elastic piece 2-2 are arc-shaped clamping ends with downward depressions, and the clamping ends 2-41 of the second sealing strip 2-4 and the arc-shaped elastic piece 2-2 are arc-shaped clamping ends with downward depressions.

When water is needed to be injected, the water injection head is deeply inserted into the water inlet 2-1, the water injection head can press the arc-shaped elastic sheet 2-2 which is arched upwards, then the arc-shaped elastic sheet can be deformed into a straight shape or a downward sunken shape, a gap is generated between the water injection head and the clamping positions of the first sealing strip clamping end 2-31 and the second sealing strip clamping end 2-41 which are arranged at the left side and the right side and provided with the downward sunken arc-shaped clamping ends, water enters the single-row water injection column 5 through the gap, when the water is filled, the water injection head is removed, the arc-shaped elastic sheet 2-2 recovers the upward arched shape, then the left end 2-21 with the upward arc shape of the arc-shaped elastic sheet 2-2 is clamped and sealed with the arc-shaped first sealing strip clamping end 2-31 with the downward sunken arc shape, the right end 2-22 with the upward arc-shaped elastic sheet 2-2 is clamped and sealed with the arc-shaped second sealing, thereby ensuring that the injected water cannot overflow. After water injection, before or after the single-row inflatable column 6 is inflated, the bag body can be placed into a freezing chamber for freezing or a refrigerating chamber for refrigerating to form an air column bag of an ice bag with single-layer multi-row ice blocks or an air column bag of an ice bag with flowing single-layer multi-row flowing ice water so as to meet different cold chain transportation requirements.

Because there is a volume expansion after the water is injected and frozen, the amount of water injected can be adjusted as needed without having to fill the entire single column of water-filled columns 5 with enough water to inflate them.

Furthermore, the upper part of the water inlet 2-1 on the first film layer 2 is provided with a sealing strip 2-0 capable of being repeatedly pasted as required to seal the water inlet 2-1, so that after an external sharp object enters the water inlet to press the arc-shaped elastic sheet 2-2, water in the single-row water filling column 5 flows out.

As shown in FIG. 6, the one-way inflation valve 6-1 comprises an air inlet 3-1 and a one-way check valve 3-2 located on the second film layer 3; the one-way check valve 3-2 comprises a first outer membrane 3-211, a second outer membrane 3-212, a first inner membrane 3-221 which is overlapped with and adhered to the first outer membrane 3-211, a second inner membrane 3-222 which is overlapped with and adhered to the second outer membrane 3-212, and an inflation channel 3-23 communicated with the air inlet 3-1, wherein the other end of the inflation channel is closed by mutual overlapping of electrostatic adhesion force of the tail end of the first inner membrane 3-221 and the tail end of the second inner membrane 3-222, when the inflation is carried out, the pressure of an inflation device is larger than the electrostatic adhesion force of the tail end of the first inner membrane 3-221 and the tail end of the second inner membrane 3-222, so that the other end of the inflation channel is opened and filled with air, when the inflation is finished, the tail end of the second inner membrane 3-222 is forced to return to the position adhered to the tail end of the first inner membrane 3-221 by the internal, and because of the electrostatic adhesion force between the tail end of the first inner membrane 3-221 and the tail end of the second inner membrane 3-222, the other end of the air charging channel is in a closed state, and the air cannot overflow.

As shown in figure 3, the one-way water filling valve 5-1 and the one-way air charging valve 6-1 in the same column are arranged in opposite air inlet directions, the water inlet direction of the water inlet 2-1 of the one-way water filling valve 5-1 is arranged downwards, and the air inlet 3-1 of the one-way air charging valve 6-1 is arranged upwards, so that the one-way water filling valve 5-1 and the one-way air charging valve 6-1 in the fluid charging area 1-4 of the bag body 1 can be ensured to be simultaneously charged with fluid, the situation that more bag body areas are required and more materials such as PE films are required due to the arrangement in the same direction is avoided, and the production time and the production cost are saved.

As shown in fig. 3, the bag body 1 is also provided with a plurality of heat-sealing folding points 1-5, and the heat-sealing folding points 1-4 separate a single-row inflatable column 5 and a single-row inflatable column 6 into a multi-section foldable structure; the first film layer 2, the second film layer 3 and the third film layer 4 which form the single row of the water charging columns 5 and the single row of the air charging columns 6 are all sealed into one point, the single row of the water charging columns 5 and the single row of the air charging columns 6 are respectively provided with 5 heat-sealing folding points 1-5, and the number of the heat-sealing folding points 1-5 of the single row of the water charging columns 5 and the single row of the air charging columns 6 can be set according to the length of the single row of the water charging columns 5 and the length of the air charging columns 6 and the requirement of the number of foldable sections.

As shown in fig. 1-2, the heat-seal folding points 1-5 are oval, the major diameter direction of the heat-seal folding points is perpendicular to the length direction of the single row of water-filled columns 5 and the single row of air-filled columns 6, a water passage 5-2 is reserved between the two ends of the major diameter and the side wall of the water-filled column 5, and a gas passage 6-2 is reserved between the two ends of the major diameter and the side wall of the air-filled column 6, so that water or gas can be filled into the sections of the single row of water-filled columns 5 and the single row of water-filled columns 6 separated by the heat-seal folding points 1-5 respectively.

Example 2

As shown in fig. 1-2 and 4, the reusable air column bag for cold chain provided by the present embodiment includes a bag body 1, the bag body 1 is composed of a first film layer 2, a second film layer 3, a third film layer 4 and a fourth film layer 7 located between the first film layer 2 and the second film layer 3, a first heat-sealing seam 1-1 and a second heat-sealing seam 1-2 respectively disposed at left and right sides of the bag body, a plurality of rows of folding seams 1-3, and a fluid-filled area 1-4;

the third film layer 4 and the fourth film layer 7 are fixedly connected through heat sealing, or detachably connected through gum or adhesive non-woven fabrics;

as shown in fig. 4, a plurality of rows of folding seams 1-3 are arranged at intervals in the bag body, so that the fourth film layer 7 is tightly connected with the third film layer 4, a plurality of upper single-row inflatable columns 5 are formed between the first film layer 2 and the third film layer 4, and a plurality of lower single-row inflatable columns 6 are formed between the fourth film layer 7 and the second film layer 3;

as shown in fig. 1, the left side and the right side of the bag body are respectively provided with a first heat-sealing seam 1-1 and a second heat-sealing seam 1-2, so that a plurality of film layers are tightly connected to form a closed bag body 1, and a plurality of single-row inflating columns 5 and a plurality of single-row inflating columns 6 form an enclosure body, namely the closed bag body 1 wraps fresh goods to be transported by a cold chain or easily fermented milk, fruits, vegetables, meat, seafood and the like or medical medicaments to be transported by the cold chain.

The fluid filling area 1-4 of the bag body 1 comprises a plurality of one-way water filling valves 5-1 positioned at the upper parts of the single-row water filling columns 5 and a plurality of one-way inflation valves 6-1 positioned at the upper parts of the inflation columns 6;

As shown in FIG. 4, the single row of

columns

5 and 6 forming the same row are sealed at one heat seal fold 1-51 between the first film layer 2 and the third film layer 4 and one heat seal fold 1-52 between the fourth film layer 7 and the second film layer 3, and there are 2 heat seal folds 1-5 in a direction perpendicular to the plane of overlap of the first film layer 2, the third film layer 4, the fourth film layer 7 and the second film layer 3 at one heat seal fold 1-5: heat seal fold points 1-51 and heat seal fold points 1-52. The number of the heat-seal folding points of the single-row water charging columns 5 in the same row and the number of the heat-seal folding points of the single-row air charging columns 6 in the same row are the same, and the number of the heat-seal folding points 1-5 of the row in which the single-row water charging columns 5 and the single-row air charging columns 6 are located can be set according to the requirements of the lengths and the number of the foldable sections of the single-row water charging columns 5 and the single-row air charging columns.

Furthermore, the number of the heat-seal folding points of the single column of the water-filled column and the single column of the air-filled column can be set according to the requirements of the length of the single column of the water-filled column and the air-filled column and the number of the foldable sections, the columns of different columns can be provided with different numbers of heat-seal folding points,

when the articles needing to be conveyed cannot suddenly change the temperature and are wrapped from the warehouse, one surface with the single-row inflatable columns 6 is selected to be tightly attached to the articles to be conveyed to wrap the articles, and then a layer which is refrigerated or frozen and is provided with the single-row inflatable columns 5 is used as an outer layer, so that the low temperature of the single-row inflatable columns 5 with low temperature can be transmitted to the single-row inflatable columns 6 firstly and then transmitted to the articles to be conveyed gradually, the temperature of the single-row inflatable columns 6 is gradually reduced due to continuous transmission of the low temperature of the single-row inflatable columns 5, the temperature of the conveyed articles is slowly reduced through heat conduction, and the conditions that the conveyed articles such as fresh fruits and vegetables are frozen and the like and the inactivation of medical reagents caused by suddenly contacting the single-row inflatable columns 5 with low temperature are avoided. In this case, the number of the heat-seal folding points 1 to 51 of the single row of the air-filled columns 5 in the same row is larger than the number of the heat-seal folding points 1 to 52 of the single row of the air-filled columns 6 in the same row.

When the goods to be transported need extremely low and better refrigeration effect during packaging, the surface which is refrigerated or frozen and is provided with the plurality of single-row water charging columns 5 is selected to be tightly attached to the goods to be transported to wrap, and then the surface which is provided with the plurality of single-row air charging columns 6 is used as an outer layer, so that the low temperature of the plurality of single-row water charging columns 5 with low temperature can be directly tightly attached to and transferred to the goods to be transported, the surface which is provided with the plurality of single-row air charging columns 6 is wrapped on one layer of the plurality of single-row water charging columns 5 with low temperature, and the air in the plurality of single-row air charging columns 6 is utilized, thereby avoiding the direct heat exchange between an external heat source and the plurality of single-row water charging columns 5 with; in this case, the number of the heat-seal folding points 1 to 52 of the single row of the air-filled columns 6 in the same row is larger than the number of the heat-seal folding points 1 to 51 of the single row of the air-filled columns 5 in the same row. The condition can ensure that the low temperature of the single-row water filling columns 5 keeps the conveyed article at the low temperature for a long time, slows down the rate of heat exchange with the outside, can keep the low temperature for a long time while quickly cooling the conveyed article, and prevents the articles from being damaged, the liquid in the conveyed articles from leaking, the conveyed articles from being cracked and the like caused by external collision, thereby having the technical effects of killing three birds with one stone.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A reusable air column bag for a cold chain comprises a bag body (1) and is characterized in that the bag body (1) consists of a plurality of film layers, a first heat sealing seam (1-1) and a second heat sealing seam (1-2) which are respectively arranged on the left side and the right side of the bag body, a plurality of rows of folding seams (1-3) and a fluid filling area (1-4), wherein the film layers comprise a first film layer (2) and a second film layer (3);

multiple lines of folding seams (1-3) are arranged at intervals in the bag body, so that a plurality of upper single-line inflatable columns (5) and a plurality of lower single-line inflatable columns (6) are respectively formed among the multiple film layers;

the left side and the right side of the bag body are respectively provided with a first heat sealing seam (1-1) and a second heat sealing seam (1-2) so that the plurality of film layers are tightly connected to form a closed bag body (1);

the fluid filling area (1-4) of the bag body (1) comprises a plurality of one-way water filling valves (5-1) positioned at the upper parts of the single-row water filling columns (5) and a plurality of one-way air filling valves (6-1) positioned at the upper parts of the air filling columns (6);

the unidirectional water filling valve (5-1) comprises a water inlet (2-1) positioned on the first film layer (2), an arc-shaped elastic sheet (2-2) positioned at the lower part of the water inlet (2-1), and a first sealing strip (2-3) and a second sealing strip (2-4) which are positioned at two sides of the arc-shaped elastic sheet (2-2);

the arc-shaped elastic piece (2-2) is arched upwards;

the first sealing strip (2-3) and the second sealing strip (2-4) are axially symmetrical about the middle point of the water inlet and are respectively clamped and sealed with the two ends of the arc-shaped elastic sheet (2-2);

the one-way inflation valve (6-1) comprises an air inlet (3-1) and a one-way check valve (3-2) which are positioned on the second film layer (3);

the water inlet direction of the water inlet (2-1) of the one-way water filling valve (5-1) in the same column is opposite to the air inlet direction of the air inlet (3-1) of the one-way air filling valve (6-1).

2. The reusable air column bag for cold chain as claimed in claim 1, wherein the first sealing strip clamping end (2-31) of the first sealing strip (2-3) and the arc-shaped elastic piece (2-2) is an arc-shaped clamping end with a downward recess, and the second sealing strip clamping end (2-4) and the second sealing strip clamping end (2-41) of the arc-shaped elastic piece (2-2) are arc-shaped clamping ends with a downward recess.

3. A reusable cold chain air column bag according to claim 1 wherein the number of said plurality of film layers is 3, said plurality of film layers comprising a first film layer (2), a second film layer (3) and a third film layer (4), said third film layer (4) being located between said first film layer (2) and said second film layer (3); form a plurality of single row water columns (5) of inflating of upper strata between first thin layer (2) and third thin layer (4), form a plurality of single row of lower floor between third thin layer (4) and second thin layer (3) and inflate post (6).

4. The reusable air column bag for cold chain as claimed in claim 1, wherein the number of the plurality of film layers is 4, the plurality of film layers comprise a first film layer (2), a second film layer (3), a third film layer (4) and a fourth film layer (7), the fourth film layer (7) is tightly connected with the third film layer (4), a plurality of single-row water-filled columns (5) on the upper layer are formed between the first film layer (2) and the third film layer (4), and a plurality of single-row water-filled columns (6) on the lower layer are formed between the fourth film layer (7) and the second film layer (3).

5. A reusable air column bag for cold chain according to claim 4 wherein said third film layer (4) and said fourth film layer (7) are fixedly attached by heat sealing or removably attached by adhesive backed or bonded non-woven.

6. A reusable cold chain air column bag according to any of claims 3-5 wherein said first film layer (2) is further provided with a re-attachable seal (2-0) above said water inlet (2-1).

7. The reusable cold chain air column bag according to claim 1, wherein the single row of air column (5) and the single row of air column (6) of the bag body (1) are further provided with a plurality of heat-sealing folding points (1-5), and the heat-sealing folding points (1-5) separate the single row of air column (5) and the single row of air column (6) into a multi-segment foldable structure;

the heat-seal folding points (1-5) seal all the multilayer films forming the single row of the inflatable columns (5) and the single row of the inflatable columns (6) into one point; or the single column of the water-filled columns (5) and the single column of the water-filled columns (6) are formed by sealing a point between every two adjacent films of the multi-layer film, and a plurality of heat-sealing folding points (1-5) are arranged in the vertical direction of the overlapped planes of the same column of the multi-layer film.

8. A reusable cold chain air column bag according to claim 7 wherein when there are a plurality of heat seal folding points (1-5) in the direction perpendicular to the overlapping plane of the multilayer film, the number of heat seal folding points of said single row of air column (5) is greater than the number of heat seal folding points of said single row of air column (6), or the number of heat seal folding points of said single row of air column (6) is greater than the number of heat seal folding points of said single row of air column (5), or the number of heat seal folding points of said single row of air column (6) is equal to the number of heat seal folding points of said single row of air column (5).

9. A reusable cold chain air column bag according to claim 7 wherein said heat seal fold (1-5) is oval with the major diameter perpendicular to the length of said single column of columns (5, 6).

10. The reusable cold chain air column bag according to claim 9, wherein a water passage (5-2) is left between the two ends of the long diameter of the heat-seal folding point (1-5) and the side wall where the single row of water-filled columns (5) is located; and an air passage (6-2) is reserved between the two ends of the long diameter of the heat-seal folding points (1-5) and the side wall where the single-row inflatable column (6) is located.