Intelligent air duct circulation type cold-chain logistics refrigerated container

Abstract

The invention discloses an intelligent air duct circulation type cold-chain logistics refrigerated container, and relates to the technical field of motor vehicle refrigerated carriages. The invention provides an intelligent air channel circulation type cold-chain logistics refrigerated container which comprises a container body and the like, a refrigeration assembly is installed on the container body, paired air plates are fixedly connected to the container body, the air plates and the refrigeration assembly are fixedly connected and communicated with air channels, a control panel is installed on the container body, paired placing frames are fixedly connected between the paired air plates, and the air channels are communicated with the control panel. The box body is fixedly connected with paired electric sliding rails, the electric sliding rails are provided with air guide spraying plates through sliding blocks, the paired air guide spraying plates are fixedly connected and communicated with an air collecting block, the air collecting block is slidably connected with the air plate on one side, and the placement frame on one side is fixedly connected with a temperature sensing strip. By means of the components such as the air guide spraying plate and the air collecting block, the high-temperature area in the box body can be automatically and specifically cooled, the airflow direction of cold air can be changed, and therefore goods can be cooled in an all-around mode through the cold air.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerated compartments of motor vehicles, and in particular to an intelligent air duct circulation type cold chain logistics refrigerated box. Background Art

[0002] The refrigerated compartment installed on the top of a motor vehicle can maintain the low temperature, constant temperature or specific humidity environment required for the goods through insulation materials and refrigeration systems. It is suitable for the logistics transportation of perishable or temperature-sensitive goods such as fresh food and medicines. Therefore, the refrigerated compartment can be regarded as a special logistics refrigerated box. The structure of this logistics refrigerated box must be sealed to reduce heat exchange, and it needs to be equipped with cooling devices, heating devices and ventilation systems to be suitable for the transportation of various temperature-sensitive goods.

[0003] When in use, the cold air flow direction of the existing logistics refrigerated boxes on motor vehicles is usually relatively single and cannot provide full coverage. In addition, the goods placed in the refrigerated box may also block each other, which makes it impossible for the cold air to flow through the box and effectively cool down the sides of the goods, resulting in poor overall refrigeration effect of the logistics refrigerated box.

[0004] Based on the above situation, the present invention proposes an intelligent air duct circulation cold chain logistics refrigeration box with good refrigeration effect. Summary of the Invention

[0005] In order to overcome the shortcomings of existing logistics refrigerated boxes on motor vehicles, such as the fact that the gas flow direction of cold air is usually relatively single and cannot provide all-round coverage when in use, and that the goods placed in the refrigerated box may also block each other, making it impossible for the cold air to flow through all parts of the box and effectively cool down the sides of the goods, thereby resulting in poor overall refrigeration effect of the logistics refrigerated box, the present invention provides an intelligent duct circulation cold chain logistics refrigerated box with good refrigeration effect.

[0006] An intelligent air duct circulation cold chain logistics refrigeration box includes a box body, a refrigeration component, an air plate, an air duct, a control panel, a placement rack, an air guide nozzle plate, an electric slide rail, a temperature sensor strip and an air collecting block. The box body is equipped with a refrigeration component, and a pair of air plates are fixedly connected to the box body. The air plates and the refrigeration component are fixedly connected and connected with an air duct. The box body is equipped with a control panel, and the control panel is electrically connected to the refrigeration component. Pairs of placement racks are fixedly connected between the pairs of air plates. Pairs of electric slide rails are fixedly connected to the box body, and the electric slide rails are electrically connected to the control panel. Air guide nozzle plates are installed on the electric slide rails through sliders, and the pairs of air guide nozzle plates are fixedly connected and connected with an air collecting block. The air collecting block is slidably connected to the air plates on one side, and a placement rack on one side is fixedly connected to a temperature sensor strip, and the temperature sensor strip is electrically connected to the control panel.

[0007] Further, the air guiding spray plate is provided with obliquely distributed spray nozzles longitudinally.

[0008] Further, it further includes a supplementary air mechanism. The supplementary air mechanism is arranged on the air plate. The supplementary air mechanism includes spray blocks, air guiding pipes, connecting pipes and installation cylinders. The paired spray blocks are fixedly connected to the air plate. An air guiding pipe is fixedly connected and communicated between the paired spray blocks. The box body is fixedly connected with a connecting pipe. One end of the connecting pipe is fixedly connected and communicated with the air duct on one side. The other ends of the connecting pipe are fixedly connected and communicated with the paired spray blocks. The box body is fixedly connected with an installation cylinder. The installation cylinder is fixedly connected and communicated with the connecting pipe.

[0009] Further, it further includes a disturbing mechanism. The disturbing mechanism is arranged on the installation cylinder. The disturbing mechanism includes an air blowing wheel, a protective net and wind blades. The air blowing wheel is rotatably connected to the installation cylinder. The air blowing wheel is fixedly connected with wind blades. The wind blades are rotatably connected to the installation cylinder. The installation cylinder is fixedly connected with a protective net.

[0010] Further, it further includes a dehumidifying mechanism. The dehumidifying mechanism is arranged in the box body. The dehumidifying mechanism includes mounting plates, diversion pipes, air guide pipes, air pumps, sealing blocks, servo motors, liquid absorbing blocks, heating rings, lead screws and guide rods. The paired mounting plates are fixedly connected to the box body. The mounting plates are fixedly connected and communicated with diversion pipes. The box body is fixedly connected with an air pump. An air guide pipe is fixedly connected and communicated between the air pump and the mounting plates. The box body is fixedly connected with guide rods. The guide rods are slidably connected with longitudinally distributed sealing blocks. The sealing blocks are slidably connected with the air duct. A liquid absorbing block is fixedly connected between the paired sealing blocks. The liquid absorbing block is slidably connected with the air duct. The box body is fixedly connected with a servo motor. The box body is rotatably connected with a lead screw. The output end of the servo motor is fixedly connected to the lead screw through a coupling. The lead screw is threadedly connected with the sealing block. The mounting plates are fixedly connected with longitudinally distributed heating rings.

[0011] Further, the liquid absorbing block is made of sponge material.

[0012] Further, it further includes a limiting mechanism. The limiting mechanism is arranged on the placement rack. The limiting mechanism includes limiting blocks, rotating rods and elastic pieces. The uniformly distributed rotating rods are fixedly connected to the placement rack. The rotating rods are rotatably connected with limiting blocks. Elastic pieces are fixedly connected between the limiting blocks and the placement rack.

[0013] Further, the limiting block is provided with an inclined surface.

[0014] The beneficial effects are as follows: 1. Through components such as the air guiding spray plate and the air collecting block, the present invention can not only automatically cool and lower the temperature of the areas with higher temperature in the box body in a targeted manner, but also change the air flow direction of the cold air, so that the cold air can cool and lower the temperature of the goods in all directions, improving the refrigeration effect of this logistics refrigerated box.

[0015] 2. Through components such as the spraying block and the air duct, the present invention enables cold air to be ejected outward from the eight corners of the box body, thereby expanding the flowing range of the cold air, avoiding the phenomena of temperature dead angles, local overcooling or local overheating inside the box body, ensuring the uniform temperature inside the refrigerated box, and improving the refrigeration effect of this logistics refrigerated box.

[0016] 3. Through components such as the air blowing wheel and the wind blade, the present invention can, to a certain extent, disturb the overall air flow direction of the cold air, so that the cold air can flow through and cover all storage areas to cool the goods in all directions, improving the refrigeration effect of this logistics refrigerated box.

[0017] 4. Through components such as the liquid absorption block and the lead screw, the present invention can continuously dehumidify the air inside the box body when needed, so that the air humidity inside the box can quickly reach the set standard, improving the dehumidification effect and practicality of this logistics refrigerated box.

[0018] 5. Through components such as the limiting block and the elastic sheet, the present invention can limit and fix goods of different sizes, thereby preventing the goods from colliding with and damaging the box body due to bumps and vibrations during transportation, improving the practicality and versatility of this logistics refrigerated box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of components such as the box body, the refrigeration component and the control panel of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of components such as the air duct, the placement rack and the air guiding and spraying plate of the present invention.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of components such as the refrigeration component, the air plate and the air duct of the present invention.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of components such as the air guiding and spraying plate, the electric slide rail and the temperature sensing strip of the present invention.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of components such as the electric slide rail, the temperature sensing strip and the air collecting block of the present invention.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of components such as the spraying block, the air duct and the connecting pipe of the present invention.

[0026] Figure 8 It is a three-dimensional structural schematic diagram of components such as the air duct, the connecting pipe and the installation cylinder of the present invention.

[0027] Figure 9 This is a three-dimensional structure schematic diagram of components such as the air blowing wheel, protective net, and wind blades of the present invention.

[0028] Figure 10 This is a three-dimensional structure schematic diagram of components such as the mounting plate, diversion pipe, and air guide pipe of the present invention.

[0029] Figure 11 This is a three-dimensional structure schematic diagram of components such as the air pump, sealing block, and servo motor of the present invention.

[0030] Figure 12 This is a three-dimensional structure schematic diagram of components such as the sealing block, servo motor, and liquid suction block of the present invention.

[0031] Figure 13 This is a three-dimensional structure schematic diagram of components such as the placement rack, rotating rod, and elastic piece of the present invention.

[0032] Figure 14 This is a three-dimensional structure schematic diagram of components such as the limiting block, rotating rod, and elastic piece of the present invention.

[0033] Names and serial numbers of components in the figure: 1 - box body, 11 - refrigeration component, 1101 - air plate, 1102 - air duct, 12 - control panel, 13 - placement rack, 14 - air guide spray plate, 15 - electric slide rail, 16 - temperature sensing strip, 17 - air collecting block, 2 - spray block, 21 - diversion pipe, 22 - connecting pipe, 23 - mounting cylinder, 3 - air blowing wheel, 31 - protective net, 32 - wind blades, 4 - mounting plate, 41 - diversion pipe, 42 - air guide pipe, 43 - air pump, 44 - sealing block, 45 - servo motor, 46 - liquid suction block, 47 - heating ring, 48 - lead screw, 49 - guide rod, 5 - limiting block, 51 - rotating rod, 52 - elastic piece. Detailed implementation manners

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0035] Embodiment 1

[0036] An intelligent air duct circulation type cold chain logistics refrigerated box, as Figures 1-6As shown in the figure, it includes a box body 1, a refrigeration component 11, an air plate 1101, an air duct 1102, a control panel 12, a placement rack 13, a wind guiding and spraying plate 14, an electric slide rail 15, a temperature sensing strip 16 and an air collecting block 17. The refrigeration component 11 is installed on the left side of the box body 1. The upper and lower sides inside the box body 1 are fixedly connected with the air plates 1101. An air duct 1102 is fixedly connected and communicated between the air plate 1101 and the refrigeration component 11. The control panel 12 is installed on the left part of the front side of the box body 1, and the control panel 12 is electrically connected with the refrigeration component 11. Two front and rear placement racks 13 are fixedly connected between the upper and lower air plates 1101. The electric slide rails 15 are fixedly connected to the front and rear sides inside the box body 1, and the electric slide rails 15 are electrically connected with the control panel 12. The wind guiding and spraying plates 14 are installed on one side where the two electric slide rails 15 are close to each other through sliders. An air collecting block 17 is fixedly connected and communicated between the front and rear wind guiding and spraying plates 14. The air collecting block 17 is slidably connected with the upper air plate 1101. A temperature sensing strip 16 is fixedly connected to the middle part of the front side of the rear placement rack 13. The temperature sensing strip 16 is integrated by a plurality of axially distributed temperature sensors, and the temperature sensing strip 16 is electrically connected with the control panel 12.

[0037] As Figure 5 and Figure 6 shown, obliquely arranged nozzles distributed longitudinally up and down are formed on one side where the two wind guiding and spraying plates 14 are close to each other.

[0038] When workers need to conduct logistics transportation on perishable or temperature-sensitive goods such as fresh food and drugs, they can first place the goods inside the box body 1 of the logistics refrigeration box on the motor vehicle, and then neatly arrange the goods on the placement rack 13 and start the refrigeration component 11 through the control panel 12. The refrigeration component 11 can make the air circulate clockwise inside the box body 1, the air plate 1101 and the air duct 1102 and continuously cool and lower the temperature of the air to ensure that the circulating cold air can maintain the temperature inside the box body 1 within a suitable range. During this period, the temperature sensing strip 16 integrated by multiple axially distributed temperature sensors can monitor the temperature at various places inside the box body 1. Since the air flow direction of the cold air at this time is to spray out from the upper air plate 1101 and flow downward until it is inhaled by the lower air plate 1101, the goods stored on the upper layer will inevitably obstruct and affect the flow of the cold air, resulting in the cold air being unable to flow through all parts of the box body 1 and effectively cool and lower the temperature of all sides of the goods. As a result, there may be temperature dead spots and local overheating phenomena inside the box body 1. When the temperature sensing strip 16 measures that the temperature of a certain area is too high, the control panel 12 will start the electric slide rail 15 and drive the air guiding spray plate 14 and the air collecting block 17 to move to the locally overheated area through the electric slide rail 15. At this time, part of the gas sprayed out by the upper air plate 1101 will be gathered by the air collecting block 17 and enter the air guiding spray plates 14 on the front and rear sides, and finally spray out from the obliquely distributed longitudinal spray openings opened on the air guiding spray plates 14. And because the air flow direction of the cold air at this time is no longer simply from top to bottom, but also from the front and rear sides to the middle, the cold air at this time can cool and lower the temperature of the goods in all directions, so that the temperature of this locally overheated area can be restored to the normal level. In this way, it can automatically conduct targeted cooling on the area with a higher temperature inside the box body 1 and change the air flow direction of the cold air, so that the cold air can cool and lower the temperature of the goods in all directions.

[0039] Embodiment 2

[0040] On the basis of Embodiment 1, as Figure 7 and Figure 8 shown, it further includes an air supply mechanism. The air supply mechanism is arranged on the air plate 1101. The air supply mechanism includes spray blocks 2, air guide pipes 21, connecting pipes 22 and mounting cylinders 23. Eight spray blocks 2 are respectively fixedly connected to the four corners of the upper and lower air plates 1101. The air guide pipes 21 are fixedly connected and communicated between the two spray blocks 2 in pairs on the left and right. The left part of the box body 1 is fixedly connected with a connecting pipe 22. One end of the connecting pipe 22 is fixedly connected and communicated with the upper air duct 1102, and the other end of the connecting pipe 22 is fixedly connected and communicated with the adjacent four spray blocks 2. The mounting cylinder 23 is fixedly connected inside the left side of the box body 1, and the mounting cylinder 23 is fixedly connected and communicated with the connecting pipe 22.

[0041] When the cold air produced by the refrigeration component 11 enters the upper wind plate 1101 through the air duct 1102, part of the cold air will enter the spray blocks 2 at the eight corners of the box body 1 through the air duct 1102, the air guide pipe 21, the connecting pipe 22 and the installation cylinder 23, and will finally be sprayed outwards from the spray ports on the spray blocks 2, so as to expand the flow range of the cold air, avoid the phenomenon of temperature dead corners, local overcooling or local overheating inside the box body 1, and ensure the uniform temperature inside the refrigerator.

[0042] As Figure 3 and Figure 9 shown, it also includes a disturbance mechanism. The disturbance mechanism is arranged in the installation cylinder 23. The disturbance mechanism includes an air blowing wheel 3, a protective net 31 and a wind blade 32. The air blowing wheel 3 is rotatably connected to the left side inside the installation cylinder 23. The right side of the air blowing wheel 3 is fixedly connected with the wind blade 32. The wind blade 32 is rotatably connected to the installation cylinder 23. The right side of the installation cylinder 23 is fixedly connected with the protective net 31.

[0043] When part of the gas in the upper air duct 1102 passes through the connecting pipe 22 and the installation cylinder 23, the air blowing wheel 3 in the installation cylinder 23 will start to rotate counterclockwise under the blowing of the cold air. At this time, the wind blade 32 will also rotate counterclockwise with the air blowing wheel 3. Once the wind blade 32 rotates, it will disturb the overall air flow direction of the cold air to a certain extent, so that the cold air can flow through and cover all storage areas to cool the goods in all directions. The protective net 31 is used to shield and protect the wind blade 32.

[0044] As Figures 10-12 shown, it also includes a dehumidification mechanism. The dehumidification mechanism is arranged in the box body 1. The dehumidification mechanism includes a mounting plate 4, a diversion pipe 41, a gas guide pipe 42, a gas pump 43, a sealing block 44, a servo motor 45, a liquid suction block 46, a heating ring 47, a lead screw 48 and a guide rod 49. Two mounting plates 4 are respectively fixedly connected to the front and rear parts on the left side of the box body 1. The bottom of the mounting plate 4 is fixedly connected and communicated with the diversion pipe 41. The other end of the diversion pipe 41 is communicated with the outside air. A gas pump 43 is fixedly connected to the left part of the box body 1. A gas guide pipe 42 is fixedly connected and communicated between the gas pump 43 and the mounting plate 4. A guide rod 49 is fixedly connected to the lower left side of the box body 1. Three sealing blocks 44 distributed longitudinally in the front and rear directions are slidably connected to the outside of the guide rod 49. The sealing blocks 44 are slidably connected to the air duct 1102. Liquid suction blocks 46 are fixedly connected between adjacent two sealing blocks 44. The liquid suction blocks 46 are slidably connected to the air duct 1102. A servo motor 45 is fixedly connected to the rear part on the left side of the box body 1. A lead screw 48 is rotatably connected to the lower left side of the box body 1. The output end of the servo motor 45 is fixedly connected to the lead screw 48 through a coupling. The lead screw 48 is threadedly connected to the sealing block 44. Heating rings 47 distributed longitudinally in the front and rear directions are fixedly connected inside the mounting plate 4.

[0045] As Figure 11 and Figure 12 shown, the liquid suction block 46 is made of sponge material.

[0046] When the worker needs to dehumidify the air inside the box body 1, the liquid absorption block 46 made of sponge material at the rear can be used to dehumidify the cold air passing through the lower air duct 1102 first. At this time, the liquid absorption block 46 made of sponge material will achieve the purpose of dehumidification by adsorbing the moisture in the cold air. When the liquid absorption block 46 at the rear adsorbs moisture and tends to be saturated, the servo motor 45 can be started. The servo motor 45 will drive the lead screw 48 to rotate forward, thereby driving the longitudinally distributed sealing block 44 and the liquid absorption block 46 to move backward until the liquid absorption block 46 at the front completely enters the lower air duct 1102, and the liquid absorption block 46 at the rear will completely enter the rear mounting plate 4. At this time, the sealing blocks 44 on both the front and rear sides can ensure the airtightness of the lower air duct 1102 to avoid gas leakage, and the liquid absorption block 46 at the front will start to dehumidify the cold air passing through the lower air duct 1102. At the same time, the worker can start the heating ring 47 at the rear and heat the liquid absorption block 46 at the rear, thereby evaporating the moisture in the liquid absorption block 46 at the rear for subsequent use. During this period, the worker can also start the air pump 43. The air pump 43 will cause the water vapor generated by the evaporation of the moisture inside the liquid absorption block 46 at the rear to pass through the air duct 42 and be discharged outward through the front mounting plate 4 and the diversion pipe 41. When the liquid absorption block 46 at the front adsorbs moisture and tends to be saturated, the servo motor 45 can drive the lead screw 48 to rotate in the reverse direction, so that the longitudinally distributed sealing block 44 and the liquid absorption block 46 move forward and reset. At this time, the restored liquid absorption block 46 at the rear can continue to dehumidify the cold air passing through the lower air duct 1102. By cycling in this way, the air inside the box body 1 can be continuously dehumidified, so that the air humidity inside the box body 1 can quickly reach the set standard.

[0047] As Figure 13 and Figure 14 shown, it further includes a limiting mechanism. The limiting mechanism is arranged on the placing rack 13. The limiting mechanism includes a limiting block 5, a rotating rod 51 and an elastic sheet 52. The uniformly distributed rotating rods 51 are respectively fixedly connected to the front and rear placing racks 13. The limiting block 5 is rotatably connected to the outside of the rotating rod 51. An elastic sheet 52 is fixedly connected between the limiting block 5 and the placing rack 13.

[0048] As Figure 13 and Figure 14 shown, the top of the limiting block 5 is provided with an inclined surface.

[0049] When workers need to fix the goods placed on the placement rack 13, they can push the goods towards the inner wall of the front or rear side of the box body 1. As the goods move towards the inner wall of the box body 1, they will contact and squeeze the adjacent limit blocks 5, causing the limit blocks 5 to rotate downward, and the elastic pieces 52 will deform accordingly. When the goods continue to move until they are in close contact with the inner wall of the box body 1, some of the limit blocks 5 will separate from the goods and rotate upward to reset under the action of the elastic pieces 52. At this time, the limit blocks 5 that have rotated upward and reset can cooperate with the inner wall of the box body 1 to fix the goods, thereby limiting and fixing goods of different sizes, avoiding the goods from colliding with and damaging the box body 1 due to bumps and vibrations during transportation. When workers need to unload the goods, they only need to press down manually to make the limit blocks 5 that have rotated upward and reset rotate downward again until they no longer block the goods, and then the goods can be taken out.

[0050] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An intelligent air duct circulation type cold chain logistics refrigerated box, characterized in that: It includes a box body (1), a refrigeration component (11), a wind plate (1101), an air duct (1102), a control panel (12), a placement rack (13), a wind guiding and spraying plate (14), an electric slide rail (15), a temperature sensing strip (16) and an air collecting block (17). The box body (1) is equipped with the refrigeration component (11). The box body (1) is fixedly connected with a pair of wind plates (1101). An air duct (1102) is fixedly connected and communicated between the wind plate (1101) and the refrigeration component (11). The box body (1) is equipped with the control panel (12). The control panel (12) is electrically connected to the refrigeration component (11). A pair of placement racks (13) are fixedly connected between the pair of wind plates (1101). The box body (1) is fixedly connected with a pair of electric slide rails (15). The electric slide rail (15) is electrically connected to the control panel (12). The electric slide rail (15) is installed with the wind guiding and spraying plate (14) through a slider. An air collecting block (17) is fixedly connected and communicated between the pair of wind guiding and spraying plates (14). The air collecting block (17) is slidably connected to one side of the wind plate (1101). One side of the placement rack (13) is fixedly connected with the temperature sensing strip (16). The temperature sensing strip (16) is electrically connected to the control panel (12).

2. The intelligent air duct circulation type cold chain logistics refrigerated box according to claim 1, wherein: Among them, the wind guiding spraying plate (14) is provided with obliquely distributed spray nozzles longitudinally.

3. The intelligent air duct circulation type cold chain logistics refrigerated box according to claim 2, wherein: It further includes a make-up air mechanism. The make-up air mechanism is arranged on the wind plate (1101). The make-up air mechanism includes a spray block (2), a guide air pipe (21), a connecting pipe (22) and an installation cylinder (23). A pair of spray blocks (2) are fixedly connected to the wind plate (1101). A guide air pipe (21) is fixedly connected and communicated between the pair of spray blocks (2). The box body (1) is fixedly connected with the connecting pipe (22). One end of the connecting pipe (22) is fixedly connected and communicated with one side of the air duct (1102). The other ends of the connecting pipe (22) are fixedly connected and communicated with the pair of spray blocks (2). The box body (1) is fixedly connected with the installation cylinder (23). The installation cylinder (23) is fixedly connected and communicated with the connecting pipe (22).

4. The intelligent air duct circulation type cold chain logistics refrigerated box according to claim 3, characterized in that: It further includes a disturbing mechanism. The disturbing mechanism is arranged on the installation cylinder (23). The disturbing mechanism includes an air blowing wheel (3), a protective net (31) and a wind blade (32). The air blowing wheel (3) is rotatably connected to the installation cylinder (23). The air blowing wheel (3) is fixedly connected with the wind blade (32). The wind blade (32) is rotatably connected to the installation cylinder (23). The installation cylinder (23) is fixedly connected with the protective net (31).

5. The intelligent air duct circulation type cold chain logistics refrigerated box according to claim 4, wherein: It further includes a dehumidifying mechanism which is arranged in the box body (1). The dehumidifying mechanism includes a mounting plate (4), a diversion pipe (41), a gas guide pipe (42), an air pump (43), a sealing block (44), a servo motor (45), a liquid suction block (46), a heating ring (47), a lead screw (48) and a guide rod (49). The paired mounting plates (4) are fixedly connected to the box body (1). The mounting plate (4) is fixedly connected and communicated with the diversion pipe (41). The box body (1) is fixedly connected with an air pump (43). An air guide pipe (42) is fixedly connected and communicated between the air pump (43) and the mounting plate (4). The box body (1) is fixedly connected with a guide rod (49). The guide rod (49) is slidably connected with a longitudinally distributed sealing block (44). The sealing block (44) is slidably connected with the air duct (1102). A liquid suction block (46) is fixedly connected between the paired sealing blocks (44). The liquid suction block (46) is slidably connected with the air duct (1102). The box body (1) is fixedly connected with a servo motor (45). The box body (1) is rotatably connected with a lead screw (48). The output end of the servo motor (45) is fixedly connected to the lead screw (48) through a coupling. The lead screw (48) is threadedly connected with the sealing block (44). The mounting plate (4) is fixedly connected with a longitudinally distributed heating ring (47).

6. The intelligent air duct circulation type cold chain logistics refrigerated box according to claim 5, characterized in that: Among them, the liquid suction block (46) is made of sponge material.

7. The intelligent air duct circulation type cold chain logistics refrigerated box according to claim 6, characterized in that: It further includes a limiting mechanism which is arranged on the placing rack (13). The limiting mechanism includes a limiting block (5), a rotating rod (51) and an elastic sheet (52). The uniformly distributed rotating rods (51) are fixedly connected to the placing rack (13). The rotating rod (51) is rotatably connected with the limiting block (5). An elastic sheet (52) is fixedly connected between the limiting block (5) and the placing rack (13).

8. An intelligent air duct circulation type cold chain logistics refrigerated box according to claim 7, characterized in that: Among them, the limiting block (5) is provided with an inclined surface.

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