A cold chain multi-temperature zone cold storage and distribution device

Abstract

The present invention discloses a cold chain multi-temperature zone cold storage and refrigeration distribution device, which relates to the technical field of refrigeration distribution devices; it includes a storage box and a refrigeration box, the refrigeration box is fixedly connected to the storage box and transmits low-temperature gas to the storage box; a plurality of partition assemblies are provided in the storage box, and the partition assemblies divide the storage box into a plurality of compartments; a door that opens the internal space of the storage box is provided on one side of the storage box; a windshield assembly is movably provided in the storage box, the windshield assembly is located on the inside of the door, and a driving assembly is provided in the storage box, which drives the windshield assembly to move away from the door to reduce the refrigeration space of the cargo storage environment. The present invention automatically drives the windshield assembly to move by the driving assembly, and the automatic movement of the windshield assembly reduces the obstructed cargo storage space, so that the refrigeration space adapts to the amount of cargo, reduces cold air consumption, and prolongs the refrigeration time of the cold storage medium.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerated distribution devices, and in particular to a cold chain multi-temperature zone cold storage and refrigerated distribution device. Background Art

[0002] The cold chain is a supply chain system that uses specific technical means and management processes to precisely control the temperature of temperature-sensitive goods throughout their entire process, from production, processing, transportation, warehousing, to final delivery. This system aims to ensure product quality and safety and reduce loss or failure due to temperature fluctuations. During the cold chain delivery process, refrigerated distribution units are required to maintain a low-temperature environment for goods. These intelligent temperature-control devices are designed specifically for the transportation of temperature-sensitive goods. By integrating refrigeration, insulation, and monitoring technologies, they create a comprehensive low-temperature environment system from warehousing to final delivery. Their core value lies in precisely controlling key parameters such as temperature and humidity within the cargo space, ensuring that fresh foods (such as chilled meat and dairy products), pharmaceutical products (vaccines and biologics), and chemical raw materials remain stable and inactive during transportation. To reduce operating costs, refrigerated distribution units utilize cold storage technology. Cold storage utilizes refrigeration units to store cold energy in the form of sensible or latent heat in media such as water, ice, or phase change materials during nighttime power off-peak hours. This cold energy is then released during daytime power peaks to meet cooling needs for air conditioning or process cooling. The core is to balance the load of the power grid, reduce operating costs by "shifting peaks and filling valleys", and improve the utilization rate of refrigeration equipment.

[0003] For example, Chinese patent publication number CN115406156A in the prior art discloses a cold storage type multi-temperature cold chain delivery box, comprising a box body and a refrigeration unit, wherein a cold storage device is provided inside the storage box body, and the refrigeration unit is connected to the cold storage device. The storage box body is further provided with a first loading area, a second loading area and a third loading area which are connected in sequence, wherein the first loading area is connected to the air outlet of the cold storage device, and the third loading area is connected to the air return outlet of the cold storage device, and a plurality of temperature sensors are provided inside the first loading area, the second loading area and the third loading area, and the temperature sensors are all connected to a controller; by setting up multiple loading areas and controlling the temperatures of the multiple loading areas, multi-temperature delivery can be achieved. However, in this disclosed device, the door needs to be opened to take out or put in items during the process of taking out or putting items. After the door is opened, the loading compartment is completely open, causing the low-temperature gas inside to leak out quickly. When the internal material decreases, the cooling gas in the vacant space after opening the door quickly overflows, causing the temperature of the internal space to rise, requiring more cooling capacity to cool the internal space, resulting in reduced cooling efficiency. The cold storage capacity is limited, and during the frequent taking out and delivery of items, the cold storage capacity is easily exhausted before the delivery task is completed, resulting in an inability to maintain a low-temperature environment for the refrigerated items. Summary of the Invention

[0004] The purpose of the present invention is to solve the above technical problems and provide a cold chain multi-temperature zone cold storage and distribution device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cold chain multi-temperature zone cold storage and distribution device comprises a storage box and a refrigeration box, wherein the refrigeration box is fixedly connected to the storage box and delivers low-temperature gas to the storage box;

[0007] A plurality of partition assemblies are provided in the storage box body, and the partition assemblies divide the storage box body into a plurality of compartments; a door is provided on one side of the storage box body to open the internal space of the storage box body; a wind shield assembly is movably provided in the storage box body, and the wind shield assembly is located on the inner side of the door; a driving assembly is provided in the storage box body, and the driving assembly drives the wind shield assembly to move away from the door to reduce the refrigeration space of the cargo storage environment.

[0008] Furthermore, the windshield assembly includes a movable frame and a first movable plate and a second movable plate slidably connected to the movable frame, and a guide rod is fixedly connected to the storage box body, and the guide rod passes through the movable frame and slides with the movable frame; the movable frame includes an upper beam and a side beam, and the side beam is provided at two places and is respectively fixed at both ends of the upper beam, and a first slide groove and a second slide groove arranged in parallel are provided on the upper beam, the first movable plate is slidably connected in the first slide groove and slides along the first slide groove, and the second movable plate is slidably connected in the second slide groove and slides along the second slide groove.

[0009] Furthermore, the driving assembly includes a transmission assembly rotatably arranged in the storage box body, the transmission assembly is arranged at both ends of the movable frame, the transmission assembly includes a first roller, a second roller and a transmission belt, the first roller and the second roller are both rotatably connected to the storage box body, the transmission belt is sleeved on the first roller and the second roller to form a belt transmission connection, a driving motor is installed in the storage box body, the driving motor is transmission-connected to the first roller to drive the first roller to rotate and drive the transmission belt to rotate around the first roller; a clamping device is provided on the movable frame, the clamping device is clamped on the transmission belt, the first movable plate and the second movable plate are both fixedly connected with a transmission block, the transmission block cooperates with the clamping device so that when the push rod approaches the clamping device, the clamping device is clamped on the transmission belt.

[0010] Furthermore, a second gear is fixedly connected to the output shaft of the driving motor, a first rotating shaft is rotatably connected in the storage box, a third gear is fixedly connected to the first rotating shaft, and the second gear and the third gear are transmitted through gear meshing; a second rotating shaft is fixedly connected to the axis of the first roller, a fourth gear is fixedly connected to the second rotating shaft, a fifth gear is fixedly connected to the first rotating shaft, and the fourth gear and the fifth gear are transmitted through gear meshing, and the first rotating shaft is fixed on the second rotating shaft.

[0011] Furthermore, the clamping device includes a mounting block fixedly connected to the movable frame and a clamping sleeve fixed to the mounting block, a through-hole is provided in the clamping sleeve, the transmission belt passes through the through-hole, a push rod is slidably fitted on the mounting block, the end of the push rod is connected to a clamping block and the clamping block extends into the clamping sleeve, and the clamping block slidably fits with the clamping sleeve; a mounting cavity is provided on the mounting block, the end of the push rod extends into the mounting cavity and is hingedly connected to a first support rod, the first support rod is hingedly connected to a second support rod at one end away from the push rod, and the second support rod is away from the first support rod One end of the rod is hingedly connected to the side wall of the mounting cavity; a first compression spring is arranged in the mounting cavity, the first compression spring is located on the side of the second support rod away from the moving frame, and the end of the first compression spring abuts against the second support rod; when the transmission block is away from the transmission belt, the elastic force of the first compression spring pushes the second support rod out of the mounting cavity toward the moving frame, and when the transmission block moves toward the transmission belt, the transmission block presses the second support rod so that the second support rod and the first support rod are spread apart to push the push rod toward the transmission belt, and the push rod moves to abut the clamping block against the transmission belt so that the transmission belt is clamped on the sleeve.

[0012] Furthermore, micro switches are fixed on the mounting blocks on both sides of the storage box body, and the contacts of the micro switches are arranged opposite to the transmission block. When the transmission block approaches the transmission belt, the transmission block presses the contacts of the micro switch to close the micro switch. The two micro switches are connected in series in the control circuit of the drive motor and the drive motor is started after the two micro switches are closed.

[0013] Furthermore, the end of the push rod close to the transmission belt is fixedly connected to a second compression spring, and the clamping block is fixed to the end of the second compression spring away from the push rod.

[0014] Furthermore, the partition assembly includes a fixed partition and a movable partition, the movable partition is fixedly connected to the movable frame, the fixed partition is fixed in the storage box, and the movable partition is slidably matched with the storage box.

[0015] Furthermore, an air outlet duct is provided in the refrigeration box body, the end of the air outlet duct is connected to a plurality of branch pipes and the branch pipes extend into the compartment inside the storage box body, a fan is provided in the air outlet duct, blades are fixedly connected to the rotating shaft of the fan, and the fan drives the blades to rotate and thereby transports the cold air in the refrigeration box body to the storage box body.

[0016] Furthermore, a gate for controlling the branch pipe is provided in the branch pipe.

[0017] The present invention provides a cold chain multi-temperature zone cold storage and refrigeration distribution device, which has the following beneficial effects: the storage box is divided into multiple independent compartments by a partition component, thereby providing a multi-temperature zone environment to adapt to the requirements of different goods for different ambient temperatures; a movable windshield component is provided in the storage box, so that when the goods are reduced, the windshield component is automatically driven to move by the driving component, and the automatic movement of the windshield component reduces the obstructed cargo storage space, so that the refrigeration space adapts to the amount of goods, reduces cold air consumption, and extends the refrigeration time of the cold storage medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0019] Figure 1 A schematic diagram of the internal structure of a cold chain multi-temperature zone cold storage and distribution device provided by the present invention;

[0020] Figure 2 A schematic diagram of the internal structure of a cold chain multi-temperature zone cold storage and distribution device provided by the present invention from a top view;

[0021] Figure 3 for Figure 2 Schematic diagram of the local structure of part A in the middle;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure of the middle clamping device in the state of loosening the transmission belt;

[0023] Figure 5 for Figure 1 Schematic diagram of the local structure of part B in the middle;

[0024] Figure 6 This is a side structural diagram of the mating portion of a transmission assembly and a ferrule in a cold chain multi-temperature zone cold storage and refrigeration distribution device provided by the present invention;

[0025] Figure 7 This is a schematic cross-sectional structure diagram of the coupling portion between the clamping device and the transmission belt in a cold chain multi-temperature zone cold storage and distribution device provided by the present invention;

[0026] Figure 8This is a schematic diagram of the cross-sectional structure of an upper beam in a cold chain multi-temperature zone cold storage and distribution device provided by the present invention;

[0027] Figure 9 This is a schematic diagram of the power connection circuit of the drive motor in a cold chain multi-temperature zone cold storage and refrigeration distribution device provided by the present invention;

[0028] Figure 10 for Figure 1 Schematic diagram of the local structure of the middle air outlet duct.

[0029] Explanation of the reference numerals in the figure: 1. Storage box; 11. Guide rod; 2. Refrigeration box; 21. Air outlet pipe; 22. Fan; 23. Blade; 24. Branch pipe; 3. Partition assembly; 31. Fixed partition; 32. Movable partition; 4. Box door; 5. Wind shield assembly; 51. Moving frame; 511. Upper beam; 5111. First slide; 5112. Second slide; 512. Side beam; 52. First moving plate; 53. Second moving plate; 54. Transmission block; 6. Drive assembly; 61. Transmission assembly; 611, first roller; 612, second roller; 613, transmission belt; 62, drive motor; 63, second gear; 64, first rotating shaft; 65, third gear; 66, second rotating shaft; 67, fourth gear; 68, fifth gear; 7, clamping device; 71, clamping sleeve; 72, mounting block; 73, push rod; 74, clamping block; 75, first support rod; 76, second support rod; 77, first compression spring; 78, second compression spring; 8, micro switch. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status between the various components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0033] like Figures 1-10As shown, a cold chain multi-temperature zone cold storage and refrigeration distribution device includes a storage box 1 and a refrigeration box 2. The refrigeration box 2 is fixedly connected to the storage box 1 and transmits low-temperature gas to the storage box 1. Specifically, a refrigeration device and a cold storage medium are provided in the refrigeration box 2. An air outlet connected to the storage box 1 is provided in the refrigeration box 2. The cold storage medium cools the air and enters the storage box 1 from the air outlet for refrigeration.

[0034] A plurality of partition assemblies 3 are provided in the storage box 1, and the partition assemblies 3 divide the storage box 1 into a plurality of compartments; a door 4 is provided on one side of the storage box 1 to open the internal space of the storage box 1; a windshield assembly 5 is movably provided in the storage box 1, and the windshield assembly 5 is located on the inner side of the door 4; a driving assembly 6 is provided in the storage box 1, and the driving assembly 6 drives the windshield assembly 5 to move away from the door 4 to reduce the refrigeration space of the cargo storage environment.

[0035] By adopting the above technical solution, the storage box 1 is divided into multiple independent compartments through the partition component 3, thereby providing a multi-temperature zone environment to adapt to the different ambient temperature requirements of different goods; a movable windshield component 5 is provided in the storage box 1, so that when the cargo is reduced, the windshield component 5 is automatically driven to move by the driving component 6, and the windshield component 5 automatically moves to reduce the obstructed cargo storage space, so that the refrigeration space adapts to the amount of cargo, reduces cold air consumption, and extends the refrigeration time of the cold storage medium.

[0036] The windshield assembly 5 includes a movable frame 51 and a first movable plate 52 and a second movable plate 53 slidingly connected to the movable frame 51. A guide rod 11 is fixedly connected to the storage box body 1. The guide rod 11 passes through the movable frame 51 and slides with the movable frame 51; the movable frame 51 includes an upper beam 511 and a side beam 512. The side beam 512 is provided at two places and is respectively fixed at both ends of the upper beam 511. The upper beam 511 is provided with a first slide groove 5111 and a second slide groove 5112 arranged in parallel. The first movable plate 52 is slidably connected in the first slide groove 5111 and slides along the first slide groove 5111. The second movable plate 53 is slidably connected in the second slide groove 5112 and slides along the second slide groove 5112. When in use, the goods are placed on the side of the windshield assembly 5 away from the box door 4, and the first movable plate 52 and the second movable plate 53 are enclosed with the storage box body 1 to form a low-temperature storage space for the goods; by moving the first movable plate 52 or the second movable plate 53, the internal storage space can be opened to facilitate loading and unloading of goods; moving the windshield assembly 5, the windshield assembly 5 can be moved outward or inward so that the windshield assembly 5 is close to the cargo boundary, reducing the refrigeration space for maintaining the low temperature of the goods; when the cargo loading and unloading is completed, the first movable plate 52 or the second movable plate 53 is moved so that the first movable plate 52 and the second movable plate 53 are moved in a relatively away direction, the edge of the first movable plate 52 abuts on the side beam 512 on one side of the moving frame 51, and the edge of the second movable plate 53 abuts on the side beam 512 on the other side of the moving frame 51, so that the windshield assembly 5 is closed. At this time, the driving motor 62 and the moving frame 51 transmit the moving frame 51 to move toward the cargo to reduce the refrigeration space. Specifically, the first movable plate 52 and the second movable plate 53 form a sliding door structure; the first movable plate 52 and the second movable plate 53 are made of one of acrylic plates, glass plates or plastic plates, as long as they can confine the low-temperature air to the inside of the storage box 1 when closed and are easy to move.

[0037] The driving assembly 6 includes a transmission assembly 61 rotatably arranged in the storage box body 1, and the transmission assembly 61 is arranged at both ends of the moving frame 51. The transmission assembly 61 includes a first roller 611, a second roller 612 and a transmission belt 613. The first roller 611 and the second roller 612 are both rotatably connected to the storage box body 1. The transmission belt 613 is sleeved on the first roller 611 and the second roller 612 to form a belt transmission connection. A driving motor 62 is installed in the storage box body 1. The driving motor 62 is transmission-connected to the first roller 611 to drive the first roller 611 to rotate and drive the transmission belt 613 to rotate around the first roller 611; a clamping device 7 is provided on the moving frame 51, and the clamping device 7 is clamped on the transmission belt 613. The first moving plate 52 and the second moving plate 53 are both fixedly connected with a transmission block 54. The transmission block 54 cooperates with the clamping device 7 so that when the push rod 73 approaches the clamping device 7, the clamping device 7 is clamped on the transmission belt 613. The engaging device 7 cooperates with the transmission block 54, so that when the first movable plate 52 and the second movable plate 53 extend outward to close the windshield assembly 5, the engaging device 7 clamps the transmission belt 613. When the drive motor 62 is activated, the transmission belt 613 moves, thereby driving the movable frame 51 toward the cargo. Specifically, guide slopes are provided at both ends of the transmission block 54.

[0038] A second gear 63 is fixedly connected to the output shaft of the drive motor 62, and a first rotating shaft 64 is rotatably connected to the storage box 1. A third gear 65 is fixedly connected to the first rotating shaft 64, and the second gear 63 and the third gear 65 are driven by gear meshing. A second rotating shaft 66 is fixedly connected to the axis of the first roller 611, and a fourth gear 67 is fixedly connected to the second rotating shaft 66. A fifth gear 68 is fixedly connected to the first rotating shaft 64, and the fourth gear 67 and the fifth gear 68 are driven by gear meshing. The first rotating shaft 64 is fixed to the second rotating shaft 66. The drive motor 62 drives the first roller 611 to rotate through a multi-stage gear transmission. The use of multi-stage gears can reduce the output speed of the drive motor 62, preventing the first roller 611 from rotating too quickly, which would cause the moving frame 51 to move too quickly and cause the first and second moving plates 52 and 53 to collide with the cargo.

[0039] The clamping device 7 includes a mounting block 72 fixedly connected to the moving frame 51 and a clamping sleeve 71 fixed on the mounting block 72, a through hole is provided in the clamping sleeve 71, the transmission belt 613 passes through the through hole, a push rod 73 is slidably fitted on the mounting block 72, the end of the push rod 73 is connected to a clamping block 74 and the clamping block 74 extends into the clamping sleeve 71, and the clamping block 74 slidably fits with the clamping sleeve 71; a mounting cavity is provided on the mounting block 72, the end of the push rod 73 extends into the mounting cavity and is hingedly connected to a first strut 75, the first strut 75 is hingedly connected to a second strut 76 at one end away from the push rod 73, and the second strut 76 is hingedly connected at one end away from the first strut 75 It is connected to the side wall of the mounting cavity; a first compression spring 77 is provided in the mounting cavity, and the first compression spring 77 is located on the side of the second support rod 76 away from the moving frame 51, and the end of the first compression spring 77 abuts on the second support rod 76; when the transmission block 54 is away from the transmission belt 613, the elastic force of the first compression spring 77 pushes the second support rod 76 out of the mounting cavity toward the moving frame 51, and when the transmission block 54 moves toward the transmission belt 613, the transmission block 54 presses the second support rod 76 so that the second support rod 76 and the first support rod 75 are spread apart to push the push rod 73 toward the transmission belt 613, and the push rod 73 moves to abut the clamping block 74 on the transmission belt 613 so that the transmission belt 613 is clamped on the sleeve 71. When it is time to take or place goods, the first movable plate 52 and the second movable plate 53 are moved so that the windshield assembly 5 is partially opened, making it convenient to take or place goods. When it is time to take or place goods, the first movable plate 52 and the second movable plate 53 are moved so that the side beam 512 of the movable frame 51 is moved in principle, thereby disengaging the transmission block 54 from the first support rod 75 and the second support rod 76. Under the action of the elastic force of the first compression spring 77, the second support rod 76 is pushed out of the mounting cavity toward the movable frame 51, thereby driving the push rod 73 away from the transmission belt 613, driving the clamping block 74 away from the transmission belt 613, thereby allowing the movable frame 51 to move freely, pushing the movable frame 51 to provide a suitable space for placing goods. After the goods are taken or placed, the first movable plate 52 and the second movable plate 53 are moved out of the first support rod 75 and the second support rod 76. The movable plates 53 move toward the corresponding side beams 512 of the movable frame 51, so that the transmission block 54 moves toward the transmission belt 613. When the transmission block 54 moves to the position of the second support rod 76, it squeezes the second support rod 76 so that the second support rod 76 and the first support rod 75 are stretched apart to push the push rod 73 toward the transmission belt 613. The push rod 73 moves to push the clamping block 74 toward the transmission belt 613, so that the clamping block 74 abuts against the transmission belt 613 and clamps the transmission belt 613 on the sleeve 71. The drive motor 62 starts to drive the transmission belt 613 to move and move the movable frame 51 toward the cargo, so that the first movable plate 52 and the second movable plate 53 are close to the cargo, automatically reducing the refrigeration space, so that the refrigeration space adapts to the amount of cargo, and reduces cold air consumption.

[0040] A microswitch 8 is fixed to the mounting blocks 72 on both sides of the storage box 1. The contacts of the microswitch 8 are arranged opposite to the transmission block 54. When the transmission block 54 approaches the transmission belt 613, the transmission block 54 presses the contacts of the microswitch 8, causing the microswitch 8 to close. The two microswitches 8 are connected in series to the control circuit of the drive motor 62, and the drive motor 62 is activated after both microswitches 8 are closed. By connecting the microswitches 8 in series to the power circuit of the drive motor 62, when both microswitches 8 are abutted by the transmission block 54, causing both microswitches 8 to close, the drive motor 62 is connected to the power supply and activated. Driven by the drive motor 62, the movable frame 51 moves toward the cargo, thereby automatically driving the windshield assembly 5 toward the cargo after closing, thereby reducing the refrigeration space. The drive motor 62 automatically stops driving after a certain period of time. Specifically, a time-delayed disconnection relay is connected in series to the control circuit of the drive motor 62 to achieve delayed disconnection.

[0041] A second compression spring 78 is fixedly connected to the end of the push rod 73 near the transmission belt 613, and the clamping block 74 is fixed to the end of the second compression spring 78 away from the push rod 73. The second compression spring 78 provides an elastic clamping force between the clamping block 74 and the transmission belt 613. When the moving frame 51 encounters excessive resistance to movement, the tension of the transmission belt 613 overcomes the friction between the clamping block 74 and the moving frame 51, causing the frame 51 to slide, thereby preventing damage to components caused by rigid transmission.

[0042] The partition assembly 3 includes a fixed partition 31 and a movable partition 32. The movable partition 32 is fixedly connected to the movable frame 51. The fixed partition 31 is fixed in the storage box 1, and the movable partition 32 is slidably engaged with the storage box 1. When the movable frame 51 moves, the movable partition 32 moves synchronously, thereby maintaining the independence of the separated compartments.

[0043] The refrigeration box 2 is provided with an air outlet duct 21. A plurality of branch pipes 24 are connected to the end of the air outlet duct 21, and the branch pipes 24 extend into the compartment inside the storage box 1. A fan 22 is provided inside the air outlet duct 21. Blades 23 are fixedly connected to the rotating shaft of the fan 22. The fan 22 drives the blades 23 to rotate, thereby transporting the cold air in the refrigeration box 2 to the storage box 1. The cold air in the refrigeration box 2 is transported to the storage box 1 through the air outlet duct 21, thereby ensuring that the storage box 1 maintains a low temperature environment.

[0044] The branch pipes 24 are provided with dampers for controlling the branch pipes 24. By controlling the position of the dampers, the air delivery volume of different branch pipes 24 is adjusted, thereby making different compartments within different temperature ranges.

[0045] The parts not involved in this technical solution can be implemented using existing technologies.

[0046] The basic principles, main features, and characteristics of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention includes the appended claims and their equivalents.

Claims

1. A cold chain multi-temperature zone cold storage and refrigeration distribution device, comprising a storage box (1) and a refrigeration box (2), wherein the refrigeration box (2) is fixedly connected to the storage box (1) and transports low-temperature gas into the storage box (1); characterized in that: The storage box (1) is provided with a plurality of partition assemblies (3), the partition assemblies (3) dividing the storage box (1) into a plurality of compartments; a door (4) opening the internal space of the storage box (1) is provided on one side of the storage box (1); a windshield assembly (5) is movably provided in the storage box (1), the windshield assembly (5) being located inside the door (4); a driving assembly (6) is provided in the storage box (1), the driving assembly (6) driving the windshield assembly (5) to move away from the door (4) to reduce the refrigeration space of the cargo storage environment; The windshield assembly (5) includes a moving frame (51) and a first moving plate (52) and a second moving plate (53) slidably connected to the moving frame (51); a guide rod (11) is fixedly connected to the storage box (1); the guide rod (11) passes through the moving frame (51) and slides with the moving frame (51); the moving frame (51) includes an upper beam (511) and a side beam (512); the side beam (512) is provided at two locations and is respectively fixed to the two ends of the upper beam (511); the upper beam (511) is provided with a first sliding groove (5111) and a second sliding groove (5112) arranged in parallel; the first moving plate (52) is slidably connected to the first sliding groove (5111) and slides along the first sliding groove (5111); the second moving plate (53) is slidably connected to the second sliding groove (5112) and slides along the second sliding groove (5112); The driving assembly (6) includes a transmission assembly (61) rotatably arranged in the storage box (1), the transmission assembly (61) is arranged at both ends of the moving frame (51), the transmission assembly (61) includes a first roller (611), a second roller (612) and a transmission belt (613), the first roller (611) and the second roller (612) are both rotatably connected to the storage box (1), the transmission belt (613) is sleeved on the first roller (611) and the second roller (612) to form a belt transmission connection, a driving motor (62) is installed in the storage box (1), the The driving motor (62) is connected to the first roller (611) in a transmission manner to drive the first roller (611) to rotate and drive the transmission belt (613) to rotate around the first roller (611); a clamping device (7) is provided on the movable frame (51); the clamping device (7) is clamped on the transmission belt (613); the first movable plate (52) and the second movable plate (53) are both fixedly connected to a transmission block (54); the transmission block (54) cooperates with the clamping device (7) so that when the push rod (73) approaches the clamping device (7), the clamping device (7) is clamped on the transmission belt (613); By moving the first movable plate or the second movable plate, the internal storage space can be opened to facilitate loading and unloading of goods; Move the windshield assembly outward or inward to bring the windshield assembly closer to the cargo boundary, thereby reducing the refrigeration space required to maintain the cargo at a low temperature.

2. The cold chain multi-temperature zone cold storage and distribution device according to claim 1, characterized in that: A second gear (63) is fixedly connected to the output shaft of the driving motor (62); a first rotating shaft (64) is rotatably connected in the storage box (1); a third gear (65) is fixedly connected to the first rotating shaft (64); the second gear (63) and the third gear (65) are driven by gear meshing; a second rotating shaft (66) is fixedly connected to the axis of the first roller (611); a fourth gear (67) is fixedly connected to the second rotating shaft (66); a fifth gear (68) is fixedly connected to the first rotating shaft (64); the fourth gear (67) and the fifth gear (68) are driven by gear meshing; the first rotating shaft (64) is fixed to the second rotating shaft (66).

3. The cold chain multi-temperature zone cold storage and distribution device according to claim 1, characterized in that: The clamping device (7) comprises a mounting block (72) fixedly connected to the moving frame (51) and a clamping sleeve (71) fixed to the mounting block (72); a through hole is provided in the clamping sleeve (71), and the transmission belt (613) passes through the through hole; a push rod (73) is slidably fitted on the mounting block (72); the end of the push rod (73) is connected to a clamping block (74), and the clamping block (74) extends into the clamping sleeve (71); the clamping block (74) is slidably fitted with the clamping sleeve (71); a mounting cavity is provided on the mounting block (72); the end of the push rod (73) extends into the mounting cavity and is hingedly connected to a first support rod (75); the first support rod (75) is hingedly connected to a second support rod (76) at one end away from the push rod (73); the second support rod (76) is hingedly connected to the other end away from the first support rod (75); On the side wall of the installation cavity; a first compression spring (77) is provided in the installation cavity, the first compression spring (77) is located on the side of the second support rod (76) away from the moving frame (51), and the end of the first compression spring (77) abuts against the second support rod (76); when the transmission block (54) is away from the transmission belt (613), the elastic force of the first compression spring (77) pushes the second support rod (76) out of the installation cavity in the direction of the moving frame (51); when the transmission block (54) moves in the direction of the transmission belt (613), the transmission block (54) presses the second support rod (76) so that the second support rod (76) and the first support rod (75) are spread apart and the push rod (73) is pushed toward the transmission belt (613); the push rod (73) moves and the clamping block (74) abuts against the transmission belt (613), so that the transmission belt (613) is clamped on the clamping sleeve (71).

4. The cold chain multi-temperature zone cold storage and distribution device according to claim 3, characterized in that: A micro switch (8) is fixed on the mounting blocks (72) on both sides of the storage box (1), and the contact of the micro switch (8) is arranged opposite to the transmission block (54). When the transmission block (54) approaches the transmission belt (613), the transmission block (54) presses the contact of the micro switch (8) to close the micro switch (8). The two micro switches (8) are connected in series in the control circuit of the drive motor (62), and the drive motor (62) is started after the two micro switches (8) are closed.

5. The cold chain multi-temperature zone cold storage and distribution device according to claim 3, characterized in that: The end of the push rod (73) close to the transmission belt (613) is fixedly connected to the second compression spring (78), and the clamping block (74) is fixed to the end of the second compression spring (78) away from the push rod (73).

6. The cold chain multi-temperature zone cold storage and distribution device according to claim 3, characterized in that: The partition assembly (3) comprises a fixed partition (31) and a movable partition (32), wherein the movable partition (32) is fixedly connected to the movable frame (51), the fixed partition (31) is fixed in the storage box (1), and the movable partition (32) is slidably matched with the storage box (1).

7. The cold chain multi-temperature zone cold storage and distribution device according to claim 1, characterized in that: The refrigeration box (2) is provided with an air outlet pipe (21), the end of the air outlet pipe (21) is connected to a plurality of branch pipes (24), and the branch pipes (24) extend into the compartment in the storage box (1). The air outlet pipe (21) is provided with a fan (22), and a blade (23) is fixedly connected to the rotating shaft of the fan (22). The fan (22) drives the blade (23) to rotate and thereby transports the cold air in the refrigeration box (2) to the storage box (1).

8. The cold chain multi-temperature zone cold storage and distribution device according to claim 7, characterized in that: A gate plate for controlling the branch pipe (24) is provided in the branch pipe (24).

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