Long-time-effect cold-chain transportation heat preservation box

Abstract

The invention relates to the technical field of cold-chain transportation heat preservation boxes, in particular to a long-time-effect cold-chain transportation heat preservation box which comprises a box body, a box cover, a sealing gasket and a heat insulation cavity and further comprises an inner box, a circulation cavity, a butt joint opening and a circulation opening, the box cover is rotationally installed on the surface of the box body, and the sealing gasket is fixedly installed at the top of the box body; the heat insulation cavity is arranged between the outer wall and the inner wall of the box body, the inner box is fixedly installed in the box body, the circulation cavities are arranged between the box body and the inner box, the butt joint openings are formed in the surface of the box body, and a plurality of sets of circulation openings are arranged around the inner box. The butt joint openings in the surfaces of every two adjacent box bodies are aligned through magnetic attraction, splicing of the box bodies is achieved, circulation between the butt joint openings is achieved, cold air can circulate in the inner box bodies in all the box bodies through the circulation cavities, and when the box bodies are separated from each other, the butt joint openings of the box bodies are closed. All the box bodies are communicated together through the butt joint ports.

Description

Technical Field

[0001] The present invention relates to the technical field of cold chain transport insulation boxes, and in particular to a long-term cold chain transport insulation box. Background Art

[0002] With the continuous development of society, people's requirements for fresh food are getting higher and higher. For some aquatic river products, in order to ensure their freshness, higher standards are required for transportation and storage. Low temperature transportation must be guaranteed throughout the entire process. Cold chain transportation has become people's preferred mode of transportation. Cold chain transportation stores the products in insulated boxes, transports them to nearby stations via special refrigerated transport vehicles, and then delivers them to customers.

[0003] Because the refrigeration equipment in the refrigerated trucks for cold chain transportation consumes a lot of fuel when working, some manufacturers combine cost and convenience; they will choose not to turn on the refrigeration equipment during transportation. Usually, they will just add ice bags, ice boxes and other cold storage materials into the insulated box, and complete the low-temperature transportation through the continuous release of cold air by the cold storage materials and the insulation design of the insulated box. This mode of transportation is suitable for transportation tasks with shorter distances. When the transportation destination is far away, the manufacturer will still choose to turn on the refrigeration equipment in the refrigerated truck to provide a stable low-temperature environment for the transported products. There are several different packaging methods for products transported in refrigerated truck boxes. One is to not directly seal the product in a closed package, but directly expose the loaded product to the refrigerated environment of the refrigerated truck. In this way, the cold air in the refrigerated truck will directly contact the product, and the cold air provided is efficient, but After arriving at the destination, the product still needs to be packaged, which is troublesome. If the packaging process is cumbersome and slow, it is easy to cause the product to deteriorate. Another way is to use ordinary packaging boxes without thermal insulation effect to package the product, which not only ensures that the product is wrapped, but also allows the cold air in the refrigerated truck to directly exchange heat with the product. However, when unloading at the destination, the packaging box does not have thermal insulation function, and the product is exposed to the external environment and is easy to deteriorate. The product and the cold storage material can also be placed in an insulated box with thermal insulation function, and then the insulated box is loaded into the refrigerated compartment. However, due to its own thermal insulation characteristics, the insulated box for storing products is difficult to maintain communication with the low temperature environment in the refrigerated compartment. The cold air in the refrigerated compartment is difficult to directly enter the insulated box, and the cold storage material in the insulated box is also gradually melting.

[0004] In order to avoid the problem of low cooling efficiency of refrigeration equipment in refrigerated trucks for products inside insulated boxes, a long-term cold chain transportation insulated box is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a long-term cold chain transportation insulated box. By bringing the insulated boxes containing products in the refrigerated truck close together, the storage space inside all the insulated boxes is automatically connected. The cold air generated by the refrigeration equipment in the refrigerated truck will pass through the surfaces of all the insulated boxes to directly supply cold air to the products for low-temperature storage. Moreover, when the insulated boxes are moved away from each other, they return to an independent insulation environment, thus solving the problem of low cooling efficiency of the refrigerated environment of the refrigerated truck to the insulated boxes.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A long-term cold chain transport insulation box, comprising a box body, a box cover, a sealing gasket, a temperature-insulating cavity, and also an inner box, a circulation cavity, a docking port, and a circulation port. The box cover is rotatably mounted on the surface of the box body, the sealing gasket is fixedly mounted on the top of the box body, the temperature-insulating cavity is arranged between the outer wall and the inner wall of the box body, the inner box is fixedly mounted inside the box body, the circulation cavity is arranged between the box body and the inner box, the docking port is arranged on the surface of the box body, and the circulation port is provided with a plurality of groups of surrounding arrangements on the four sides of the inner box. The docking ports on the surfaces of two adjacent box bodies are aligned by magnetic attraction to achieve splicing between the box bodies, and circulation between the docking ports is achieved, so that cold air can circulate in the inner boxes inside all box bodies through the circulation cavity, and when the boxes are separated from each other, their respective docking ports are closed.

[0008] Preferably, the docking port includes a fixed ring and a baffle door, the fixed ring passes through the temperature insulation cavity and is fixedly installed between the outer wall and the inner wall of the box body and is connected to the flow cavity, the baffle door is rotatably installed on the inner wall of the box body and fits with the surface of the fixed ring, the baffle door surface is provided with a gear ring, a magnetic block is slidably installed on the inner wall of the fixed ring, a push rod is slidably installed inside the fixed ring, the push rod passes through the fixed ring and meshes with the surface of the gear ring, a return spring is fixedly installed between the push rod and the fixed ring, and the push rod is fixedly connected to the magnetic block.

[0009] In the above scheme, the fixed ring fits with the inner and outer walls of the box to ensure the thermal insulation structure of the box. The magnetic blocks attract each other under the action of magnetic force when they are close to each other, which is convenient for docking of the docking interface. At the same time, through the meshing structure of the push rod and the gear ring, the magnetic block drives the push rod to move when it moves, and the push rod drives the opening and closing of the baffle door by pushing the gear ring, thereby controlling the opening and closing of the docking interface.

[0010] Preferably, the flow port includes a retaining ring and an opening, the retaining ring is fixedly mounted on the surface of the inner box, the opening is arranged on the surface of the retaining ring, a plurality of notches are provided on the surface of the retaining ring, an air cylinder is fixedly mounted on the surface of the inner box near the retaining ring, a push rod is sleeved inside the air cylinder, the push rod is aligned with the opening, and the cross-sectional diameter matches the aperture of the opening, a piston ring is fixedly mounted on one end of the push rod, and the other end is fitted with the inner wall of the retaining ring, an air cavity is arranged between the push rod and the inner wall of the air cylinder, and the air cavity is filled with gas.

[0011] In the above scheme, the notch is opened on the surface of the retaining ring and is separated from the opening by a certain distance. The push rod is used as a switch to control the connectivity between the opening and the notch. The opening surrounds the surface of the retaining ring and fits with the push rod. The movement of the push rod can be converted into the opening and closing of the notch in the first time. The piston ring enhances the airtightness between the push rod and the air cavity, and forms a piston structure with the gas cylinder. When the volume of gas in the air cavity changes, the movement of the push rod is controlled.

[0012] Preferably, there are two arrangements of the docking ports on the surface of the box, one of which is that the docking ports are arranged on the four sides of the box, the front, back, left and right, and the other is that the docking ports are arranged on the front and back sides of the box. The two docking methods correspond to two different boxes, namely an inner box and a side box, and the surfaces of the inner box and the side box are coated with two different numbers for distinction.

[0013] In the above scheme, by designing the arrangement of the docking interfaces on the surface of the box, the number of unnecessary docking interfaces is reduced while the boxes can still be connected to each other, saving production costs. Different numbers are painted on the surface of the box as marks, so that staff can distinguish between inner and outer boxes more quickly.

[0014] Preferably, a sealing ring is fixedly installed on the surface of the fixing ring, a push ring is slidably installed inside the fixing ring, the push ring is arranged between the magnetic block and the sealing ring, the shape of the push ring is consistent with the shape of the sealing ring, the sealing ring is made of soft rubber material, and the surface has strong friction.

[0015] In the above scheme, the sealing ring is made of soft material. The push ring will squeeze the sealing ring when moving, so that the sealing ring is lifted up and deformed. When deformed, the surfaces fit each other, improving the airtightness between the docking interfaces. In addition, the elastic force of the sealing ring itself can buffer the impact force between the boxes.

[0016] Preferably, a plurality of bayonet holes are symmetrically provided at both ends of the surface of the fixing ring, a clamping block is slidably mounted on the inner wall of the bayonet hole at one end, and an elastic member is fixedly mounted between the clamping block and the fixing ring.

[0017] In the above scheme, an asymmetric design is adopted so that only one end of the clamping ring surface is installed with a clamping block. When the interfaces are docked, the clamping block enters the clamping port to facilitate clamping of the adjacent boxes.

[0018] Preferably, the positions of the bayonet openings on each of the two opposite sides are aligned, and the positions of the clamping blocks are opposite.

[0019] In the above scheme, the installation directions of the card blocks on the surfaces of the docking interfaces are different, and when any two docking interfaces are aligned, the positions of the card blocks and the bayonet ports can correspond.

[0020] Preferably, one end of the card blocks are aligned with each other, and the other end is in contact with the magnetic block.

[0021] In the above scheme, one end of the card block is flush with the surface of the box. When the surface of the box is attached to other objects, one end of the card block is flush with the surface of the box, and the other end is against the magnetic block so that the magnetic block will not move, so that the docking port will only open when it contacts another docking port, and will not open when it contacts other metal surfaces.

[0022] Preferably, the gas filled in the air cavity is nitrogen.

[0023] In the above scheme, nitrogen, as the main gas component in the air, is easy to obtain and is prone to thermal expansion and contraction.

[0024] Preferably, the docking interface is in contact with the surface of the box body, and the docking interface is made of a material with weak thermal conductivity as a whole, and the inner box and the flow port are made of a material with good thermal conductivity as a whole.

[0025] In the above scheme, the overall thermal conductivity of the interface is weak, and when it is set on the surface of the box, it will not affect the thermal insulation performance of the box. The inner box and the flow port have good thermal conductivity, which can enable rapid heat exchange between the internal environment of the inner box and the cold air in the flow cavity.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention connects all the boxes together through the docking interface, so that the flow cavity inside the box forms an overall environment. The box in the refrigerated compartment can efficiently use the refrigeration equipment in the compartment to provide a stable low-temperature storage environment for the transported products. Oxygen can also be input at the docking interface to provide oxygen for the fresh products in the box.

[0028] 2. After the boxes in the present invention are spliced ​​together, the block and the snap-on in the docking interface cooperate with each other, and all the boxes are limited to each other, so that all the boxes in the car form an overall stable connection structure, which can prevent the boxes from accidentally separating when the car is shaking and affect the connectivity at the docking interface. At the same time, the sealing ring on the surface of the docking interface can improve the air tightness of the docking interface through deformation and fit, ensuring that the cold air can be stably transmitted through the docking interface. It can also form a buffer area between the boxes to offset part of the impact force caused by the shaking of the car.

[0029] 3. In the present invention, the boxes are separated from each other and the interfaces are closed to keep the products warm. When unloading and stacking, the boxes can be arranged in a reasonable order so that they are no longer connected. The interior of each box is restored to an independent insulation space to preserve the internal cold air and continue to provide a low-temperature environment for the products. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is a side cross-sectional structural schematic diagram of the present invention;

[0032] Figure 3 It is a schematic diagram of the position structure of the docking port and the box body of the present invention;

[0033] Figure 4 It is a schematic diagram of the position structure of the clamp ring and the box body of the present invention;

[0034] Figure 5 For the present invention Figure 4 The enlarged structural diagram of part A in the middle;

[0035] Figure 6 For the present invention Figure 2 The enlarged structural diagram of part B in the middle;

[0036] Figure 7 It is a schematic diagram of the inner box structure of the present invention;

[0037] Figure 8 For the present invention Figure 7 The schematic diagram of the cross-sectional structure of the middle C part;

[0038] Fig. 9 It is a schematic diagram of the box discharge rule and cold air flow direction of the present invention.

[0039] In the figure: 1. box body; 2. box cover; 3. sealing gasket; 4. temperature insulation chamber; 5. inner box; 6. circulation chamber; 7. docking port; 71. fixing ring; 72. baffle; 73. gear ring; 74. magnetic block; 75. push rod; 76. return spring; 77. push ring; 78. sealing ring; 79. bayonet; 710. clamping block; 711. elastic part; 8. circulation port; 81. clamping ring; 82. opening; 83. notch; 84. air cylinder; 85. push rod; 86. piston ring; 87. air chamber. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Please refer to the figure to Figures 1 to 9 The present invention provides a long-term cold chain transport insulation box, and the technical solution is as follows:

[0042] As an embodiment of the present invention, reference Figures 1 to 3A long-term cold chain transport insulation box includes a box body 1, a box cover 2, a sealing gasket 3, a temperature insulation cavity 4, an inner box 5, a circulation cavity 6, a docking port 7, and a circulation port 8. The box cover 2 is rotatably mounted on the surface of the box body 1, the sealing gasket 3 is fixedly mounted on the top of the box body 1, the temperature insulation cavity 4 is arranged between the outer wall and the inner wall of the box body 1, the inner box 5 is fixedly mounted inside the box body 1, the circulation cavity 6 is arranged between the box body 1 and the inner box 5, the docking port 7 is arranged on the surface of the box body 1, and the circulation port 8 is provided with a plurality of groups of surrounding arrangements around the inner box 5, the docking port 7 is fitted with the surface of the box body 1, and the docking port 7 is made of a weak thermal conductive material as a whole, specifically made of polypropylene plastic. Polypropylene is not only light in weight but also has poor thermal conductivity, so that the arrangement of the docking port 7 will not damage the box body 1 The inner box 5 and the circulation port 8 have their own thermal insulation effect. The inner box 5 and the circulation port 8 are made of metal copper as a good thermal conductive material. The inner box 5 and the circulation port 8 have good thermal conductivity as a whole. The inner box 5 and the circulation cavity 6 can exchange heat faster. When the cold air reaches the circulation cavity 6, the low temperature can be transmitted to the inner box 5 through the surface of the inner box 5. The circulation port 8 has good thermal conductivity, so that the gas filled in the air cavity 87 can exchange heat with the cold air in the circulation cavity 6 and shrink faster when it is cold. The docking ports 7 on the surfaces of two adjacent box bodies 1 are aligned through magnetic attraction to achieve splicing between the box bodies 1 and circulation between the docking ports 7, so that the cold air can circulate in the inner box 5 inside all the box bodies 1 through the circulation cavity 6. When the box bodies 1 are separated from each other, their respective docking ports 7 are closed.

[0043] As an embodiment of the present invention, reference Figure 4 and Figure 5 The docking port 7 includes a fixing ring 71 and a baffle 72. The fixing ring 71 penetrates the temperature-insulating cavity 4 and is fixedly installed between the outer wall and the inner wall of the box body 1 and is communicated with the flow cavity 6. The fixing ring 71 is completely fitted with the outer wall and the inner wall of the box body 1 to ensure that the overall structure of the temperature-insulating cavity 4 inside the box body 1 is not damaged. The baffle 72 is rotatably installed on the inner wall of the box body 1 and is fitted with the surface of the fixing ring 71. The function of the baffle 72 is to control the opening and closing of the docking port 7. When the baffle 72 is opened, the gas can enter the interior of the box body 1 through the docking port 7. A toothed ring 73 is provided on the surface of the baffle 72. A magnetic block 74 is slidably installed on the inner wall of the fixing ring 71. A push rod 7 is slidably installed inside the fixing ring 71. 5. The push rod 75 passes through the fixing ring 71 and meshes with the surface of the toothed ring 73. The push rod 75 is fixedly connected to the magnetic block 74. Through the magnetic attraction of the magnetic block 74, the docking interface 7 on the surface of the box body 1 can be docked more conveniently. The attraction of the magnetic block 74 also provides power for the opening and closing of the baffle door 72. The push rod 75 is driven by the movement of the magnetic block 74 to push the toothed ring 73 on the surface of the baffle door 72 to rotate, so that the baffle door 72 is opened. A return spring 76 is fixedly installed between the push rod 75 and the fixing ring 71. When the boxes 1 are separated, the magnetic blocks 74 no longer attract each other and no longer apply thrust to the push rod 75. The return spring 76 provides elastic force for the return of the push rod 75.

[0044] As an embodiment of the present invention, reference Figure 7 and Figure 8 The flow port 8 includes a clamping ring 81 and an opening 82. The clamping ring 81 is fixedly mounted on the surface of the inner box 5, and the opening 82 is arranged on the surface of the clamping ring 81. A plurality of notches 83 are opened on the surface of the clamping ring 81. A gas cylinder 84 is fixedly mounted on the surface of the inner box 5 near the clamping ring 81. A push rod 85 is sleeved inside the gas cylinder 84. The push rod 85 is aligned with the opening 82, and the cross-sectional diameter coincides with the aperture of the opening 82. A piston ring 86 is fixedly mounted on one end of the push rod 85, and the other end is fitted with the inner wall of the clamping ring 81. An air cavity 87 is arranged between the push rod 85 and the inner wall of the gas cylinder 84. The air cavity 87 is filled with gas. The push rod 85, the piston ring 86 and the gas cylinder 84 form a piston structure. When the gas inside the air cavity 87 expands and contracts with heat and cold, the push rod 85 is pushed to move and control the opening and closing of the flow port 8 through the piston principle. The gas filled in the air cavity 87 is specifically nitrogen. The gas in the air cavity 87 uses nitrogen, which not only reacts strongly to thermal expansion and contraction, but is also easy to obtain.

[0045] As an embodiment of the present invention, reference Fig. 9 There are two ways of arranging the docking interface 7 on the surface of the box body 1. One of the ways is that the docking interface 7 is arranged on the four sides of the box body 1, namely the front, back, left and right sides; the other way is that the docking interface 7 is arranged on the front and back sides of the box body 1. The two docking methods correspond to two different boxes 1, namely the inner box and the side box, and the inner box and the side box are coated with two different numbers on the surface to distinguish them. There are only four groups of docking interfaces 7 on the surface of the inner box, and only two groups on the surface of the side box, which not only satisfies that each layer of the boxes 1 can be interconnected, but also sets as few docking interfaces 7 as possible, which can save manufacturing costs.

[0046] As an embodiment of the present invention, reference Figure 5 A sealing ring 78 is fixedly installed on the surface of the fixing ring 71, and a push ring 77 is slidably installed inside the fixing ring 71. The push ring 77 is arranged between the magnetic block 74 and the sealing ring 78. The shape of the push ring 77 is consistent with the shape of the sealing ring 78. The sealing ring 78 is made of soft rubber material and has a strong friction on the surface. During the docking process of the docking interface 7, the sealing rings 78 can fit each other to ensure the airtightness between the docking interfaces 7, and the sealing rings 78 have a certain elasticity. When they contact each other, they can provide a buffer area between the box bodies 1 to offset the impact force generated by the vibration of the carriage during transportation, thereby ensuring that the products inside the box body 1 are intact.

[0047] As an embodiment of the present invention, reference Figure 5 and Figure 6, a plurality of bayonet holes 79 are symmetrically provided at both ends of the surface of the fixing ring 71, a block 710 is slidably installed on the inner wall of the bayonet hole 79 at one end, an elastic member 711 is fixedly installed between the block 710 and the fixing ring 71, and the elastic member 711 provides power for the block 710 to reset, the positions of the bayonet holes 79 on each opposite side are aligned, and the positions of the blocks 710 are opposite, the block 710 and the bayonet hole 79 cooperate with each other to prevent the box bodies 1 from moving and misaligning, fix the two adjacent box bodies 1 stably, and form a stable connection structure for a whole layer of box bodies 1, one end of the block 710 is aligned with each other, and the other end is in contact with the magnetic block 74, when the docking interface 7 contacts the ordinary surface, the block 710 will limit the magnetic block 74, and the blocking door 72 will not open.

[0048] Working principle: When loading the boxes 1, the inner boxes and side boxes need to be arranged in a reasonable layout. In the refrigerated compartment, only one type of box 1 can be placed in each row, and the side boxes are placed outside, while the inner boxes are placed between the side boxes. Fig. 9 As shown, a layer of boxes 1 is placed, and the matching between the boxes 1 is completed by aligning the docking interfaces 7 on the surfaces of adjacent boxes 1. When the docking interfaces 7 on the surfaces of the boxes 1 are aligned and close to each other, the magnetic blocks 74 on the surface of the fixing ring 71 move close to each other under magnetic attraction, and the magnetic blocks 74 drive the push rod 75 to move when moving. Since the push rod 75 is engaged with the toothed ring 73 on the surface of the baffle door 72, the toothed ring 73 is pushed to rotate when the push rod 75 moves, so that the baffle door 72 rotates, and the fitting relationship between the baffle door 72 and the fixing ring 71 is released, so that the docking interface 7 is connected to the internal flow cavity 6 of the box 1. At this time, the flow cavity 6 inside the two adjacent boxes 1 is connected through the docking interface 7. In this way, each of the refrigerator compartments can be connected. All the boxes 1 of the layer are connected to form an integral environment of the internal circulation cavity 6. A gas pipe with a diameter matching that of the docking port 7 is designed to connect the refrigeration equipment in the refrigerated truck to the compartment, and the gas pipe is inserted into a docking port 7 exposed to the outside at the edge of the layer. When the gas pipe enters the docking port 7, it pushes the magnetic block 74 to move the push rod 75 and drive the baffle door 72 to rotate and open. The cold air discharged from the gas pipe can enter the circulation cavity 6 inside the box 1 of the layer through the docking port 7, so as to store the fresh aquatic products stored in the boxes 5 of all the boxes 1 of the layer at low temperature, and oxygen can also be transported to the box 1 through the gas pipe to provide sufficient oxygen for the fresh aquatic products during transportation to ensure vitality.

[0049] During the docking process of the two docking interfaces 7, the magnetic blocks 74 will push the card block 710 to move when they attract each other, so that the card block 710 on the surface of one of the docking interfaces 7 enters the card slot 79 on the surface of the other docking interface 7. In this way, the two docking interfaces 7 can be limited by the card block 710 to avoid the movement and misalignment between adjacent boxes 1, so that the boxes 1 placed on each layer form a stable connection structure with each other, and the shaking of the carriage during transportation may prevent the docked boxes 1 from being separated. At the same time, when the magnetic block 74 moves, it pushes the push ring 77 to move, and the moving push ring 77 lifts the sealing ring 78, so that the sealing rings 78 on the surfaces of the two adjacent docking interfaces 7 are stretched and fit each other, ensuring the airtightness between the docking interfaces 7. At the same time, the sealing ring 78 is made of soft material with a certain elasticity, which can buffer part of the impact force generated by the vibration of the carriage during transportation.

[0050] As the internal cold storage material of the box body 1 is consumed while waiting to be loaded, there is a temperature difference between the inside of the box body 1 and the refrigerated compartment. After the cold air enters the circulation cavity 6, the circulation port 8 on the surface of the inner box 5 will be opened due to the thermal expansion and contraction phenomenon, so that the cold air circulating in the circulation cavity 6 enters the inner box 5. When the cold air flows in the circulation cavity 6, it will contact the gas cylinder 84. The gas cylinder 84 is filled with nitrogen, and the gas molecules react strongly to the thermal expansion and contraction phenomenon. When the gas cylinder 84 contacts the cold air, the volume of the internal nitrogen shrinks, and the pressure difference between the inside and outside of the gas cavity 87 causes the push rod 85 to move in the opposite direction of the opening 82, releasing the limit on the notch 83, and the notch 83 is connected with the opening 82, so that the inside of the inner box 5 can be connected with the circulation cavity 6 through the circulation port 8. The oxygen-containing cold air flowing in the circulation cavity 6 enters the inner box 5 to provide a comfortable environment for the fresh aquatic products in the inner box 5. At the same time, the cold air can also slow down the melting speed of the cold storage material in the box body 1, ensuring that the internal cold storage material can still maintain the low temperature environment inside the box 1 for a period of time after unloading.

[0051] After the transportation is completed, the boxes 1 need to be disassembled and unloaded, and the boxes 1 need to be separated one by one. After the boxes 1 are separated, the magnetic blocks 74 between the boxes 1 are no longer attracted to each other, and no thrust is applied to the push rod 75 and the card block 710. The push rod 75 is reset under the elastic action of the reset spring 76, pushing the baffle door 72 to rotate and close the docking port 7, and then the boxes 1 are unloaded from the car one by one. The unloaded boxes 1 will be temporarily stacked outdoors or in a non-low temperature environment. At this time, it is necessary to pay attention to the placement distance between the boxes 1, and try to avoid the docking ports 7 being in a connected state during temporary stacking. If it is impossible to avoid stacking the boxes 1 close to each other due to the size of the site, try to follow the inner box and side box exchange method. The boxes 1 are stacked in a staggered arrangement so that the docking ports 7 will not be connected when they are temporarily stacked, so that the interior of each box 1 can be restored to an independent environment, reducing the cold air consumption inside the box 1 and extending the insulation time of the box 1. At the same time, after the box 1 is unloaded, the internal air cylinder 84 is no longer in direct contact with the cold air generated by the refrigeration equipment. After a period of time, as the surface temperature of the air cylinder 84 recovers, the distance between the gas molecules in the air cavity 87 is restored, pushing the push rod 85 to return to the fit notch 83, closing the flow port 8, preventing the cold air released by the cold storage in the inner box 5 from flowing into the flow cavity 6 through the flow port 8, and avoiding unnecessary cold air consumption.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-term cold chain transport insulation box, comprising a box body (1), a box cover (2), a sealing pad (3), and a temperature insulation chamber (4), characterized in that: It also comprises an inner box (5), a circulation cavity (6), a docking port (7), and a circulation port (8); the box cover (2) is rotatably mounted on the surface of the box body (1); the sealing gasket (3) is fixedly mounted on the top of the box body (1); the temperature-insulating cavity (4) is arranged between the outer wall and the inner wall of the box body (1); the inner box (5) is fixedly mounted inside the box body (1); the circulation cavity (6) is arranged between the box body (1) and the inner box (5); the docking port (7) is arranged on the surface of the box body (1); and the circulation port (8) comprises a plurality of groups of groups arranged around the inner box (5); the docking ports (7) on the surfaces of two adjacent boxes (1) are aligned by magnetic attraction to achieve splicing between the boxes (1) and circulation between the docking ports (7), so that cold air can circulate in the inner boxes (5) inside all the boxes (1) through the circulation cavity (6); and when the boxes (1) are separated from each other, their respective docking ports (7) are closed.

2. The long-term cold chain transport insulation box according to claim 1, characterized in that: The docking port (7) comprises a fixing ring (71) and a baffle (72); the fixing ring (71) passes through the temperature-insulating cavity (4) and is fixedly mounted between the outer wall and the inner wall of the box body (1), and is communicated with the circulation cavity (6); the baffle (72) is rotatably mounted on the inner wall of the box body (1), and is in contact with the surface of the fixing ring (71); a toothed ring (73) is provided on the surface of the baffle (72); a magnetic block (74) is slidably mounted on the inner wall of the fixing ring (71); a push rod (75) is slidably mounted inside the fixing ring (71); the push rod (75) passes through the fixing ring (71) and is meshed with the surface of the toothed ring (73); a return spring (76) is fixedly mounted between the push rod (75) and the fixing ring (71); and the push rod (75) is fixedly connected to the magnetic block (74).

3. The long-term cold chain transport insulation box according to claim 1, characterized in that: The flow port (8) comprises a snap ring (81) and an opening (82); the snap ring (81) is fixedly mounted on the surface of the inner box (5); the opening (82) is arranged on the surface of the snap ring (81); a plurality of notches (83) are provided on the surface of the snap ring (81); a gas cylinder (84) is fixedly mounted on the surface of the inner box (5) near the snap ring (81); a push rod (85) is sleeved inside the gas cylinder (84); the push rod (85) is aligned with the opening (82), and the cross-sectional diameter matches the aperture of the opening (82); a piston ring (86) is fixedly mounted on one end of the push rod (85), and the other end is in contact with the inner wall of the snap ring (81); an air cavity (87) is arranged between the push rod (85) and the inner wall of the gas cylinder (84); the air cavity (87) is filled with gas.

4. The long-term cold chain transport insulation box according to claim 1, characterized in that: There are two ways of arranging the docking ports (7) on the surface of the box body (1), one of which is that the docking ports (7) are arranged on the four sides of the box body (1), namely the front, back, left and right sides, and the other is that the docking ports (7) are arranged on the front and back sides of the box body (1). The two docking modes correspond to two different boxes (1), namely an inner box and a side box, and the surfaces of the inner box and the side box are coated with two different numbers for distinguishing them.

5. The long-term cold chain transport insulation box according to claim 2, characterized in that: A sealing ring (78) is fixedly mounted on the surface of the fixing ring (71), a push ring (77) is slidably mounted inside the fixing ring (71), the push ring (77) is arranged between the magnetic block (74) and the sealing ring (78), the shape of the push ring (77) is consistent with the shape of the sealing ring (78), the sealing ring (78) is made of soft rubber material, and the surface has strong friction.

6. The long-term cold chain transport insulation box according to claim 2, characterized in that: A plurality of bayonet holes (79) are symmetrically provided at both ends of the surface of the fixing ring (71), wherein a clamping block (710) is slidably mounted on the inner wall of the bayonet hole (79) at one end, and an elastic member (711) is fixedly mounted between the clamping block (710) and the fixing ring (71).

7. The long-term cold chain transport insulation box according to claim 6, characterized in that: The positions of the snap-in openings (79) on each of the two opposite sides are aligned, and the positions of the snap-in blocks (710) are opposite.

8. The long-term cold chain transport insulation box according to claim 6, characterized in that: One end of the clamping block (710) is aligned with each other, and the other end is in contact with the magnetic attraction block (74).

9. The long-term cold chain transport insulation box according to claim 3, characterized in that: The gas filled in the air cavity (87) is specifically nitrogen.

10. The long-term cold chain transport insulation box according to claim 1, characterized in that: The docking port (7) is in contact with the surface of the box body (1); the docking port (7) is made entirely of a material with weak thermal conductivity; the inner box (5) and the flow port (8) are made entirely of a material with good thermal conductivity.

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