An intelligent air duct circulation cold chain logistics refrigerated box

Abstract

The present invention discloses an intelligent air duct circulation type cold chain logistics refrigerated box, which relates to the technical field of motor vehicle refrigerated compartments. The present invention provides an intelligent air duct circulation type cold chain logistics refrigerated box, including a box body, etc., the box body is equipped with a refrigeration component, the box body is fixed with pairs of air plates, 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, the pairs of air plates are fixedly connected with pairs of placement racks, the box body is fixed with pairs of electric slides, the electric slides are installed with air guide plates through sliders, the pairs of air guide plates are fixedly connected and connected with air collecting blocks, the air collecting blocks are slidably connected to the air plates on one side, and the placement racks on one side are fixed with temperature sensing strips. The present invention can not only automatically perform targeted cooling and cooling on the areas with higher temperatures in the box body through components such as air guide plates and air collecting blocks, but also change the airflow direction of the cold air, so that the cold air can perform all-round cooling and cooling on the goods.

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] Furthermore, the wind guide nozzle plate is provided with longitudinally distributed oblique nozzles.

[0008] Furthermore, it also includes an air supply mechanism, which is arranged on the wind plate. The air supply mechanism includes a spray block, an air guide pipe, a connecting pipe and an installation tube. The paired spray blocks are fixedly connected to the wind plate, and the paired spray blocks are fixedly connected and connected with an air guide pipe. The box body is fixedly connected to a connecting pipe, one end of the connecting pipe is fixedly connected and connected to the air duct on one side, and the other end of the connecting pipe is fixedly connected and connected to the paired spray blocks. The box body is fixedly connected to a mounting tube, and the mounting tube is fixedly connected to the connecting pipe and connected.

[0009] Furthermore, it also includes a disturbance mechanism, which is arranged on the mounting tube. The disturbance mechanism includes an air blowing wheel, a protective net and a fan blade. The air blowing wheel is rotatably connected to the mounting tube. The air blowing wheel is fixedly connected to the fan blade. The fan blade is rotatably connected to the mounting tube. The mounting tube is fixedly connected to the protective net.

[0010] Furthermore, it also includes a dehumidification mechanism, which is arranged in the box body. The dehumidification mechanism includes a mounting plate, a guide pipe, an air guide pipe, an air pump, a sealing block, a servo motor, a liquid suction block, a heating ring, a screw and a guide rod. The paired mounting plates are fixed to the box body, the mounting plates are fixed and connected with the guide pipe, the box body is fixed with the air pump, the air pump and the mounting plate are fixed and connected with the air guide pipe, the box body is fixed with the guide rod, the guide rod is slidably connected with the longitudinally distributed sealing blocks, the sealing blocks are slidably connected to the air duct, the paired sealing blocks are fixed with liquid suction blocks, the liquid suction blocks are slidably connected to the air duct, the box body is fixed with the servo motor, the box body is rotatably connected with the screw, the output end of the servo motor is fixed with the screw through a coupling, the screw is threadedly connected to the sealing block, and the mounting plate is fixed with the longitudinally distributed heating ring.

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

[0012] Furthermore, it also includes a limiting mechanism, which is arranged on the placement rack. The limiting mechanism includes a limiting block, a rotating rod and a spring. The evenly distributed rotating rods are all fixed to the placement rack. The rotating rods are rotatably connected to the limiting block, and a spring is fixed between the limiting block and the placement rack.

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

[0014] The beneficial effects are as follows: 1. The present invention, through components such as air guide nozzles and air collecting blocks, can not only automatically and specifically cool down the areas with higher temperatures in the box, but also change the airflow direction of the cold air, so that the cold air can cool down the goods in an all-round way, thereby improving the refrigeration effect of this logistics refrigerated box.

[0015] 2. The present invention uses components such as spray blocks and air ducts to enable cold air to be sprayed out from the eight corners of the box, thereby expanding the flow range of cold air to avoid temperature dead corners, local overcooling or local overheating inside the box, and ensure consistent temperature inside the refrigerated box, thereby improving the refrigeration effect of this logistics refrigerated box.

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

[0017] 4. The present invention uses components such as liquid absorption blocks and screw rods to continuously dehumidify the air inside the box when needed, so that the air humidity inside the box can quickly reach the set standard, thereby improving the dehumidification effect and practicality of this logistics refrigerated box.

[0018] 5. The present invention can limit and fix goods of different sizes through components such as limit blocks and springs, thereby preventing the goods from colliding with the box body and being damaged due to bumps and vibrations during transportation, thereby improving the practicality and versatility of this logistics refrigerated box. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the air duct, placement rack, air guide spray plate and other components of the present invention.

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

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the components such as the air guide spray plate, the electric slide rail and the temperature sensor strip of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the electric slide rail, temperature sensor strip, wind collecting block and other components of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the spray block, air guide pipe, connecting pipe and other components of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the air guide pipe, connecting pipe, installation tube and other components of the present invention.

[0027] Figure 9 It is a schematic diagram of the three-dimensional structure of the air blowing wheel, protective net and fan blades of the present invention.

[0028] Figure 10 It is a schematic diagram of the three-dimensional structure of the mounting plate, the flow guide pipe, the air guide pipe and other components of the present invention.

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

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

[0031] Figure 13 It is a schematic diagram of the three-dimensional structure of the placement rack, rotating rod, spring and other components of the present invention.

[0032] Figure 14 It is a schematic diagram of the three-dimensional structure of the limit block, rotating rod, spring and other components of the present invention.

[0033] The names and serial numbers of the parts in the figure are: 1_box, 11_refrigeration assembly, 1101_air plate, 1102_air duct, 12_control panel, 13_placing rack, 14_air guide nozzle plate, 15_electric slide rail, 16_temperature sensor strip, 17_air collecting block, 2_spray block, 21_air guide pipe, 22_connecting pipe, 23_installation cylinder, 3_air blowing wheel, 31_protective net, 32_fan blade, 4_installation plate, 41_air guide pipe, 42_air guide pipe, 43_air pump, 44_sealing block, 45_servo motor, 46_liquid suction block, 47_heating ring, 48_screw, 49_guide rod, 5_limit block, 51_rotating rod, 52_shrapnel. DETAILED DESCRIPTION

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

[0035] Example 1

[0036] An intelligent air duct circulation cold chain logistics refrigerated box, such as Figures 1-6As shown, 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, an air guide spray plate 14, an electric slide rail 15, a temperature sensor strip 16 and an air collecting block 17. The refrigeration component 11 is installed on the left side of the box body 1. The air plates 1101 are fixedly connected to the upper and lower sides of the box body 1. The air plates 1101 and the refrigeration component 11 are fixedly connected and connected to the air duct 1102. The control panel 12 is installed on the left side of the front side of the box body 1. The control panel 12 is electrically connected to the refrigeration component 11. The front and rear air plates 1101 are fixedly connected between the upper and lower air plates 1101. There is a placement rack 13, and electric slide rails 15 are fixedly connected to the front and rear sides of the box body 1. The electric slide rails 15 are electrically connected to the control panel 12. The two electric slide rails 15 are installed with air guide plates 14 on the side close to each other through sliders. The front and rear air guide plates 14 are fixedly connected and connected with an air collecting block 17, and the air collecting block 17 is slidably connected to the upper wind plate 1101. A temperature sensor strip 16 is fixedly connected to the middle of the front side of the rear placement rack 13, wherein the temperature sensor strip 16 is obtained by integrating multiple axially distributed temperature sensors, and the temperature sensor strip 16 is electrically connected to the control panel 12.

[0037] like Figure 5 and Figure 6 As shown, two air guide spray plates 14 are provided with oblique spray outlets distributed vertically up and down on one side close to each other.

[0038] When workers need to transport perishable or temperature-sensitive goods such as fresh food and medicines, they can first place the goods inside the box 1 of the logistics refrigerated box on the motor vehicle, and then arrange the goods neatly 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 in the box 1, the wind plate 1101 and the air duct 1102 and continuously cool the air to ensure that the circulating cold air can maintain the temperature in the box 1 within a suitable range. During this period, the temperature sensor strip 16 obtained by integrating multiple axially distributed temperature sensors can monitor the temperature at various locations inside the box 1. Since the airflow direction of the cold air at this time is to spray out from the upper wind plate 1101 and flow downward until it is sucked into the lower wind plate 1101, the goods stored on the upper layer will inevitably hinder and affect the flow of cold air, thereby causing the cold air to be unable to flow through all parts of the box 1 and enter all sides of the goods. In order to effectively cool down the temperature, there may be temperature dead corners and local overheating inside the box 1. When the temperature sensor strip 16 measures that the temperature of a certain area is too high, the control panel 12 will start the electric slide 15 and drive the air guide nozzle plate 14 and the air collecting block 17 to move to the local overheating area through the electric slide 15. At this time, part of the gas ejected by the upper wind plate 1101 will be gathered by the air collecting block 17 and enter the air guide nozzle plates 14 on the front and rear sides, and finally ejected outward from the longitudinally distributed oblique nozzles opened on the air guide nozzle plates 14. Since the airflow direction of the cold air is no longer simply from top to bottom at this time, but also flows from the front and rear sides to the middle, the cold air at this time can cool down the goods in multiple directions, so that the temperature of this local overheating area returns to normal levels, so that the area with higher temperature in the box 1 can be automatically cooled and cooled, and the airflow direction of the cold air can be changed, so that the cold air can cool down the goods in all directions.

[0039] Example 2

[0040] On the basis of Example 1, Figure 7 and Figure 8 As shown, it also includes an air supply mechanism, which is arranged on the wind plate 1101. The air supply mechanism includes a spray block 2, an air guide pipe 21, a connecting pipe 22 and a mounting tube 23. The eight spray blocks 2 are respectively fixed to the four corners of the upper and lower wind plates 1101. The air guide pipe 21 is fixedly connected and connected between the two spray blocks 2 in left and right pairs. A connecting pipe 22 is fixedly connected to the left part of the box body 1. One end of the connecting pipe 22 is fixedly connected and connected to the upper air duct 1102. The other end of the connecting pipe 22 is fixedly connected and connected to the four adjacent spray blocks 2. A mounting tube 23 is fixedly connected to the left side of the inside of the box body 1. The mounting tube 23 is fixedly connected and connected to the connecting pipe 22.

[0041] When the cold air produced by the refrigeration component 11 enters the upper air plate 1101 through the air duct 1102, some of the cold air will enter the spray blocks 2 on the eight corners of the box 1 through the air duct 1102, the air guide pipe 21, the connecting pipe 22 and the mounting tube 23, and finally be ejected outward from the nozzle on the spray block 2, thereby expanding the flow range of the cold air to avoid temperature dead corners, local overcooling or local overheating inside the box 1, and ensure consistent temperature inside the refrigerator.

[0042] like Figure 3 and Figure 9 As shown, a disturbance mechanism is also included, which is arranged in the mounting tube 23. The disturbance mechanism includes an air-blowing wheel 3, a protective net 31 and a fan blade 32. The air-blowing wheel 3 is rotatably connected to the left side of the mounting tube 23. The fan blade 32 is fixedly connected to the right side of the air-blowing wheel 3. The fan blade 32 is rotatably connected to the mounting tube 23. The protective net 31 is fixedly connected to the right side of the mounting tube 23.

[0043] When part of the gas in the upper air duct 1102 passes through the connecting pipe 22 and the mounting tube 23, the air blowing wheel 3 in the mounting tube 23 will start to rotate counterclockwise under the blowing of cold air. At this time, the fan blades 32 will also rotate counterclockwise with the air blowing wheel 3. Once the fan blades 32 rotate, they will disturb the overall airflow 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 fan blades 32.

[0044] like Figure 10-12 As shown, a dehumidification mechanism is also included. The dehumidification mechanism is arranged in the box body 1. The dehumidification mechanism includes a mounting plate 4, a guide tube 41, an air guide tube 42, an air pump 43, a sealing block 44, a servo motor 45, a liquid suction block 46, a heating ring 47, a screw 48 and a guide rod 49. The two mounting plates 4 are respectively fixed to the front and rear parts of the left side of the box body 1. The bottom of the mounting plate 4 is fixedly connected and connected to the guide tube 41. The other end of the guide tube 41 is connected to the outside air. The air pump 43 is fixedly connected to the left part of the box body 1. The air pump 43 is fixedly connected to the mounting plate 4 and connected to the air guide tube 42. The lower left side of the box body 1 A guide rod 49 is fixedly connected, and three sealing blocks 44 distributed longitudinally in the front and rear are slidably connected to the outside of the guide rod 49. The sealing blocks 44 are slidably connected to the air duct 1102. A liquid absorption block 46 is fixedly connected between two adjacent sealing blocks 44. The liquid absorption block 46 is slidably connected to the air duct 1102. A servo motor 45 is fixedly connected to the rear left side of the box body 1, and a screw rod 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 screw rod 48 through a coupling, and the screw rod 48 is threadedly connected to the sealing block 44. A heating ring 47 distributed longitudinally in the front and rear is fixedly connected to the inside of the mounting plate 4.

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

[0046] When the worker needs to dehumidify the air inside the box 1, he can first dehumidify the cold air passing through the lower air duct 1102 through the sponge-made liquid-absorbing block 46 on the rear side. At this time, the sponge-made liquid-absorbing block 46 will achieve the purpose of dehumidification by absorbing moisture in the cold air. When the moisture adsorbed by the liquid-absorbing block 46 on the rear side tends to be saturated, the servo motor 45 can be started. The servo motor 45 will drive the screw rod 48 to rotate forward, thereby driving the longitudinally distributed sealing block 44 and the liquid-absorbing block 46 to move backward until the front liquid-absorbing block 46 completely enters the lower air duct 1102, and the rear liquid-absorbing block 46 will completely enter the rear mounting plate 4. At this time, the sealing blocks 44 on the front and rear sides can ensure the sealing of the lower air duct 1102 to avoid gas leakage, and the front liquid-absorbing block 46 will begin to dehumidify the cold air passing through the lower air duct 1102. Dehumidification, at the same time, the worker can start the heating ring 47 on the rear side and heat the liquid absorbing block 46 on the rear side, so as to evaporate the moisture in the liquid absorbing block 46 on the rear side for subsequent use. During this period, the worker can also start the air pump 43. The air pump 43 will make the water vapor generated by the evaporation of moisture inside the liquid absorbing block 46 on the rear side pass through the air duct 42 and be discharged outward through the front mounting plate 4 and the guide pipe 41. When the water adsorption of the liquid absorbing block 46 on the front side tends to be saturated, the servo motor 45 can drive the screw 48 to rotate in the opposite direction, so that the longitudinally distributed sealing block 44 and the liquid absorbing block 46 move forward and reset. At this time, the restored liquid absorbing block 46 on the rear side can continue to dehumidify the cold air passing through the lower air duct 1102. In this way, the air inside the box 1 can be continuously dehumidified, so that the air humidity in the box 1 can quickly reach the set standard.

[0047] like Figure 13 and Figure 14 As shown, it also includes a limiting mechanism, which is arranged on the placement rack 13. The limiting mechanism includes a limiting block 5, a rotating rod 51 and a spring 52. The evenly distributed rotating rods 51 are respectively fixed to the front and rear placement racks 13. The rotating rod 51 is externally rotated to connect to the limiting block 5. The spring 52 is fixed between the limiting block 5 and the placement rack 13.

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

[0049] When the worker needs to fix the goods placed on the placement rack 13, he can push the goods toward the front or rear inner wall of the box body 1. The movement of the goods toward the inner wall of the box body 1 will contact and squeeze the adjacent limit block 5, causing the limit block 5 to rotate downward, and the spring piece 52 will be deformed immediately. When the goods continue to move until they are close to the inner wall of the box body 1, some limit blocks 5 will separate from the goods and rotate upward and reset under the action of the spring piece 52. At this time, the limit blocks 5 that have been rotated upward and reset can cooperate with the inner wall of the box body 1 and fix the goods. In this way, goods of different sizes can be limited and fixed, thereby preventing the goods from colliding with the box body 1 and being damaged due to bumps and shaking during transportation. When the worker needs to unload the goods, he only needs to manually press down to make the limit block 5 that has been rotated upward and reset rotate downward again until it no longer blocks the goods and then he can take out the goods.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intelligent air duct circulation cold chain logistics refrigerated box, characterized by: The invention comprises a box body (1), a refrigeration component (11), an air plate (1101), an air duct (1102), a control panel (12), a placement rack (13), an air guide plate (14), an electric slide rail (15), a temperature sensor strip (16) and an air collecting block (17), wherein the box body (1) is provided with a refrigeration component (11), the box body (1) is fixed with a pair of air plates (1101), the air plates (1101) and the refrigeration component (11) are fixedly connected and communicated with an air duct (1102), the box body (1) is provided with a control panel (12), the control panel (12) and the refrigeration component (11) are electrically connected, a pair of placement racks (13) are fixedly connected between the pair of air plates (1101), the box body (1) is fixed with a pair of electric slide rails (15), and the air duct (1102) is connected to the refrigeration component (11). ), the electric slide rail (15) is electrically connected to the control panel (12), the electric slide rail (15) is installed with an air guide spray plate (14) through a slider, the paired air guide spray plates (14) are fixedly connected and connected with an air collecting block (17), the air collecting block (17) is slidably connected to the wind plate (1101) on one side, the placement rack (13) on one side is fixedly connected with a temperature sensor strip (16), the temperature sensor strip (16) is electrically connected to the control panel (12), and also includes an air supply mechanism, the air supply mechanism is set on the wind plate (1101), the air supply mechanism includes a spray block (2), an air guide pipe (21), a connecting pipe (22) and an installation tube (23), the paired spray blocks (2) are all fixedly connected to the wind plate (1101), the paired spray blocks (2) are fixedly connected and connected with an air guide pipe The air duct (21) is fixedly connected to the box (1) with a connecting pipe (22), one end of the connecting pipe (22) is fixedly connected to and communicated with the air duct (1102) on one side, and the other end of the connecting pipe (22) is fixedly connected to and communicated with the paired spray blocks (2). The box (1) is fixedly connected to a mounting cylinder (23), the mounting cylinder (23) is fixedly connected to and communicated with the connecting pipe (22), and further includes a disturbance mechanism, the disturbance mechanism is arranged on the mounting cylinder (23), the disturbance mechanism includes an air blowing wheel (3), a protective net (31) and a fan blade (32), the air blowing wheel (3) is rotatably connected to the mounting cylinder (23), the air blowing wheel (3) is fixedly connected to the fan blade (32), the fan blade (32) is rotatably connected to the mounting cylinder (23), the mounting cylinder (23) is fixedly connected to the protective net (31), and further includes a dehumidifier. The dehumidification mechanism is arranged on the box body (1), and the dehumidification mechanism includes a mounting plate (4), a flow guide tube (41), an air guide tube (42), an air pump (43), a sealing block (44), a servo motor (45), a liquid suction block (46), a heating ring (47), a screw (48) and a guide rod (49). The paired mounting plates (4) are all fixed to the box body (1), the mounting plates (4) are fixedly connected to and communicated with the flow guide tube (41), the box body (1) is fixedly connected to the air pump (43), the air pump (43) and the mounting plate (4) are fixedly connected and communicated with the air guide tube (42), the box body (1) is fixedly connected to the guide rod (49), the guide rod (49) is slidably connected to a longitudinally distributed sealing block (44), and the sealing block (44) is slidably connected to the air duct (1102).A liquid absorbing block (46) is fixedly connected between the paired sealing blocks (44), and the liquid absorbing block (46) is slidably connected to the air duct (1102). The box body (1) is fixedly connected to a servo motor (45), and the box body (1) is rotatably connected to a screw rod (48). The output end of the servo motor (45) is fixedly connected to the screw rod (48) through a coupling, and the screw rod (48) is threadedly connected to the sealing block (44). The mounting plate (4) is fixedly connected to a longitudinally distributed heating ring (47).

2. The intelligent air duct circulation cold chain logistics refrigerated box according to claim 1 is characterized by: The wind guide The spray plate (14) is provided with longitudinally distributed oblique spray ports.

3. The intelligent air duct circulation cold chain logistics refrigerated box according to claim 2 is characterized by: The absorption The block (46) is made of sponge.

4. The intelligent air duct circulation cold chain logistics refrigerated box according to claim 3 is characterized by: The invention also includes a limiting mechanism, which is arranged on the placement rack (13). The limiting mechanism includes a limiting block (5), a rotating rod (51) and a spring piece (52). The rotating rods (51) are evenly distributed and fixed to the placement rack (13). The rotating rods (51) are rotatably connected to the limiting block (5). The spring piece (52) is fixed between the limiting block (5) and the placement rack (13).

5. The intelligent air duct circulation cold chain logistics refrigerated box according to claim 4 is characterized by: The limit block (5) There is an inclined surface.

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