A cold storage compartment for agricultural product cold chain transportation

Abstract

This application relates to a refrigerated compartment for cold chain transportation of agricultural products, belonging to the technical field of cold chain transportation compartments. It includes a compartment mounting surface, a support base, a transmission belt, a drive motor, and a compartment structure. The compartment structure includes a first placement frame connected to the transmission belt via a connecting plate, a second placement frame slidably connected above the first placement frame, and a fixed support frame fixed to the support base. Through the coordinated action of a first sliding component, a second sliding component, a limiting component, and a sliding limiting component, the drive motor drives the transmission belt to sequentially move the first and second placement frames along the support base, realizing the layering, sequential unfolding, and resetting of the compartment. This refrigerated compartment for cold chain transportation of agricultural products effectively solves the problems of fixed volume, low space utilization, and inconvenient loading and unloading of goods in existing cold chain transportation compartments. It expands the volume through mechanical linkage, is easy to operate, and has a high degree of automation, making it particularly suitable for large-scale, high-efficiency cold chain transfer operations of agricultural products.

Description

Technical Field

[0001] This application relates to the field of cold chain transport container technology, and in particular to a refrigerated container for cold chain transport of agricultural products. Background Technology

[0002] Cold chain logistics refers to a special logistics system that maintains perishable foods, medicines, and other items with strict temperature requirements in a specified low-temperature environment throughout the production, storage, transportation, distribution, and sales processes. The related technology, CN116873056A, discloses a cold chain logistics transportation device for agricultural products, including a cold chain insulated compartment. The inner wall of the compartment has equidistant side wall grooves at both the front and rear ends. The inner bottom surface of the compartment has two wheel grooves. The right end of the compartment is an open end with a fixed door. The compartment contains a blocking mechanism and a bottom mechanism. The blocking mechanism includes a baffle, and the bottom mechanism includes a support plate and a bottom plate. Two fixing blocks and two pairs of limiting blocks are fixedly connected to the right surface of the baffle. Each limiting block and fixing block has a groove, and two pairs of limiting plates are provided below each pair of limiting blocks. This invention involves gradually removing the bottom plate from the compartment. During the removal process, adjusting rods at different positions are erected in stages. The bottom wheels on the adjusting rods are grounded to support the removed bottom plate. The height of the adjusting rods can be adjusted according to the height above the ground, facilitating the loading and unloading of agricultural products within the compartment and improving transportation efficiency.

[0003] One of the aforementioned technologies for refrigerated transport containers used in the cold chain of agricultural products often lacks a sequential loading and unloading process. Specifically, it's difficult to ensure that the containers are moved out one by one in the order they were packed, which not only increases operational complexity but can also lead to inefficiency. Secondly, existing devices lack an effective guiding mechanism during movement, failing to guarantee the stability and safety of the container during transport. This can result in unnecessary vibrations and shaking during loading, unloading, or movement, affecting the quality and safety of the contents. Utility Model Content

[0004] To address the inherent design limitations of current refrigerated transport containers for agricultural products, the inventors have found that loading and unloading often lacks sequential order. Specifically, it's difficult to ensure that the containers are moved out one by one in the order they were packed, increasing operational complexity and potentially leading to inefficiency. Furthermore, existing devices lack effective guiding mechanisms during movement, failing to guarantee the stability and safety of the container during transport. This can result in unnecessary vibrations and shaking during loading, unloading, or movement, affecting the quality and safety of the contents. Therefore, this application provides a refrigerated transport container for agricultural products.

[0005] The refrigerated compartment for cold chain transportation of agricultural products provided in this application adopts the following technical solution: it includes a compartment mounting surface, a support seat fixedly installed on the upper surface of the compartment mounting surface, a transmission belt rotatably connected to the support seat, a drive motor for driving the transmission belt, and a compartment mechanism installed on the transmission belt. The body mechanism includes a first placement frame slidably connected to both sides of the support base, connecting plates fixedly disposed between the two sides of the first placement frame and the transmission belt, a first sliding component disposed at the lower end face of the first placement frame and the upper end face of the support base, a second placement frame slidably connected to the upper end face of the first placement frame, a second sliding component disposed between the second placement frame and the first placement frame and the support base, a limiting component disposed between the second placement frame and the first placement frame, a fixed support frame slidably disposed on the upper end face of the second placement frame, and a sliding limiting component disposed between the second placement frame and the fixed support frame; the lower end face of the fixed support frame is fixedly connected to the support base.

[0006] By adopting the above technical solution, the carriage mounting surface provides a base, and the support seat is fixed on its upper end surface for mounting and supporting the entire carriage mechanism; the transmission belt is rotatably connected to the support seat and can move in a specific direction, while the drive motor is responsible for driving the operation of the transmission belt; the carriage mechanism consists of a first placement frame slidably connected to both sides of the support seat, a connecting plate disposed between the first placement frame and the transmission belt, a first sliding assembly that guides the sliding of the first placement frame, a fixed support frame that is fixedly connected to the support seat and affects the movement of the second placement frame, a second placement frame slidably connected above the first placement frame, and a second sliding assembly, a limiting assembly, and a sliding limiting assembly that maintain the relative position between the second placement frame and the fixed support frame.

[0007] As a preferred embodiment, the drive motor is fixedly mounted on one side of the support base, and the drive motor is configured as a forward and reverse reversing servo motor.

[0008] By adopting the above technical solution, the drive motor can easily drive the transmission belt to rotate in the forward direction, thereby opening the first and second placement frames in sequence. The drive motor can also easily drive the transmission belt to rotate in the reverse direction, thereby resetting the first and second placement frames in sequence.

[0009] As a preferred embodiment, the first sliding component includes first movable wheels respectively disposed around the lower end face of the first placement frame and first slide rails fixedly disposed on both sides of the upper end face of the support base and adapted to the first movable wheels. The first slide rails are arranged along the length direction of the support base, and the first slide rails are interference-fitted with the first movable wheels.

[0010] By adopting the above technical solution, the first sliding assembly consists of first movable wheels disposed around the lower end face of the first placement frame and first slide rails fixed to both sides of the upper end face of the support base. The function of the first movable wheels is to reduce the friction of the first placement frame during movement, allowing the first placement frame to slide smoothly along the support base. The first slide rails provide a track, ensuring that the first placement frame moves stably along a predetermined path. This design allows the first placement frame to move flexibly on the support base without lateral sliding or offset.

[0011] As a preferred embodiment, the second sliding assembly includes second movable wheels respectively disposed on both sides of the lower end of the second placement frame relative to the lower end of the first placement frame, second slide rails fixedly disposed on both sides of the upper end face of the first placement frame, support rods fixedly disposed on both sides of the lower end face of the other end of the second placement frame, and third movable wheels fixedly disposed on the lower end face of each of the support rods. The second slide rails are interference-fitted with the second movable wheels, and the third movable wheels are interference-fitted with the first slide rails.

[0012] By adopting the above technical solution, the second moving wheels are installed on both sides of the lower end of the second placement frame, enabling the second placement frame to move along the lower slide rail; the second slide rail is fixed on both sides of the upper end face of the first placement frame, providing guidance and support for the movement of the second placement frame; the support rod is fixed on both sides of the lower end face of the other end of the second placement frame and has a third moving wheel, enabling the second placement frame to move along the first slide rail, ensuring the stable movement of the second placement frame; the third moving wheel ensures that the support rod can slide smoothly along the first slide rail.

[0013] As a preferred embodiment, the limiting component includes a first baffle fixedly disposed at one end of the first placement frame relative to the first placement frame, the first baffle being disposed inside the second moving wheel, and the outer diameter of the first baffle being larger than the outer diameter of the second moving wheel.

[0014] By adopting the above technical solution, the first baffle is fixedly installed at one end of the first placement frame, and its outer diameter is larger than the outer diameter of the second moving wheel. When the first placement frame moves out, the first baffle can effectively pull the second moving wheel along its inner side, thereby moving the entire second placement frame out together. When resetting is required, the second moving wheel will pull the first baffle, thereby moving the first placement frame back to its original position. Specifically, the first baffle plays a limiting and pulling role, ensuring that the first placement frame can remain stable under unexpected circumstances, and also facilitating the movement of the first placement frame according to the pulling of the second moving wheel when needed.

[0015] As a preferred embodiment, the sliding limiting assembly includes a second baffle fixedly disposed at one end of the second placement frame relative to the fixed support frame, a guide slider fixedly disposed at the middle position of the upper surface of the second baffle, and guide grooves disposed on both sides of the fixed support frame and adapted to the guide slider, wherein the cross-section of the guide groove is configured as "T".

[0016] By adopting the above technical solution, the guide slider is fixed at the middle position of the upper end face of the second baffle and cooperates with the guide grooves on both sides of the fixed support frame, so that the second placement frame can slide smoothly along the guide structure without deviation. The guide groove is designed with a "T" shaped cross section, which not only provides more stable guidance, but also increases the contact area with the guide slider, further preventing sliding deviation.

[0017] As a preferred embodiment, both the first placement frame and the second placement frame are rectangular frame structures with open tops.

[0018] By adopting the above technical solution, it is convenient to remove and place goods in the first and second placement frames.

[0019] In summary, this application includes the following beneficial technical effects: 1. Effectively improves space utilization and transportation efficiency: Through the coordinated expansion of the first and second placement frames, the storage space can be flexibly adjusted according to the amount of goods. It expands to increase volume when fully loaded and retracts to save energy when lightly loaded, significantly reducing overall operating costs.

[0020] 2. Mechanized automatic opening and closing: The automatic opening and closing of the compartment is achieved by using a motor drive in conjunction with a transmission belt and a first sliding component and a second sliding component. The operation is simple and labor-saving, which greatly improves the efficiency of loading and unloading operations and reduces the intensity of manual labor.

[0021] 3. Simple and reliable structure, low cost: The entire expansion mechanism is based on mature technologies of moving wheels, guide rails and transmission belts. The structure is simple, and the manufacturing and maintenance costs are far lower than those of hydraulic or airbag expansion solutions. It is reliable in operation, has a low failure rate, and is very suitable for the harsh environment of cold chain transportation.

[0022] 4. Improved loading and unloading convenience: After unfolding, the first and second placement frames form a layered and easily accessible storage space, which facilitates the classification, storage and retrieval of goods, avoids searching for goods in the deep compartment, and reduces door opening time and cold loss. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a refrigerated compartment for cold chain transportation of agricultural products according to this application; Figure 2This is a schematic diagram of the structure of the refrigerated compartment for cold chain transportation of agricultural products in this application when it is opened; Figure 3 This is a structural schematic diagram of the assembly between the first and second placement frames in a refrigerated compartment for cold chain transportation of agricultural products according to this application; Figure 4 This is a structural schematic diagram of the assembly between the second placement frame and the fixed support frame in a refrigerated compartment for cold chain transportation of agricultural products according to this application; Figure 5 This application relates to a refrigerated container for cold chain transportation of agricultural products. Figure 4 A structural schematic diagram of the enlarged view at point A.

[0024] Explanation of reference numerals in the attached drawings: 100, Carriage mounting surface; 2, Support seat; 21, First slide rail; 3, Transmission belt; 31, Drive motor; 4, First placement frame; 41, First moving wheel; 42, Second slide rail; 43, First baffle; 5, Second placement frame; 51, Support rod; 521, Second moving wheel; 522, Third moving wheel; 53, Second baffle; 531, Guide slider; 6, Fixed support frame; 61, Guide groove; 7, Connecting plate. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] Please refer to the details. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This application discloses a refrigerated compartment for cold chain transportation of agricultural products. Its core feature is the ability to expand the volume of the refrigerated compartment through mechanical linkage. A support base 2 is bolted to a mounting surface 100 on the compartment, which can be considered a truck chassis or basic frame. A transmission belt 3 driven by a drive motor 31 (forward and reverse servo motor) is mounted on the support base 2. Both sides of the transmission belt 3 are fixedly connected to a first placement frame 4 via connecting plates 7. A first moving wheel 41 is mounted at the lower end of the first placement frame 4, cooperating with a first slide rail 21 arranged along the length direction on the support base 2 to form a first sliding assembly, allowing the first placement frame 4 to slide stably along the support base 2.

[0027] The second placement frame 5 engages with the second slide rail 42 at the upper end of the first placement frame 4 via the second movable wheel 521 at its lower end. Simultaneously, the other end of the second placement frame 5 engages with the first slide rail 21 via a support rod 51 and a third movable wheel 522. These two parts together constitute the second sliding assembly, allowing the second placement frame 5 to slide relative to the first placement frame 4 while its end is supported by the support base 2. The limiting assembly includes a first baffle 43 fixed to one end of the first placement frame 4, its position corresponding to the inner side of the second movable wheel 521.

[0028] The fixed support frame 6 is fixed to the support base 2, and its inner side is provided with a "T"-shaped guide groove 61. The end of the second placement frame 5 is fixed with a second baffle 53, and a "T"-shaped guide slider 531 matching the guide groove 61 is installed on the second baffle 53, forming a sliding limit assembly, which is used to guide and limit the final movement trajectory of the second placement frame 5.

[0029] Please refer to the details. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 Specifically, a refrigerated compartment for cold chain transportation of agricultural products includes a compartment mounting surface 100, a support seat 2 fixedly mounted on the upper surface of the compartment mounting surface 100, a transmission belt 3 rotatably connected to the support seat 2, a drive motor 31 for driving the transmission belt 3, and a compartment mechanism mounted on the transmission belt 3. Please refer to the details. Figure 2 , Figure 3 , Figure 4 and Figure 5 The body mechanism includes a first placement frame 4 slidably connected to both sides of the support base 2, connecting plates 7 respectively fixedly disposed between the two sides of the first placement frame 4 and the transmission belt 3, a first sliding component respectively disposed at the lower end face of the first placement frame 4 and the upper end face of the support base 2, a second placement frame 5 slidably connected to the upper end face of the first placement frame 4, a second sliding component disposed between the second placement frame 5 and the first placement frame 4 and the support base 2, a limiting component disposed between the second placement frame 5 and the first placement frame 4, a fixed support frame 6 slidably disposed on the upper end face of the second placement frame 5, and a sliding limiting component disposed between the second placement frame 5 and the fixed support frame 6. Both the first placement frame 4 and the second placement frame 5 are rectangular frame structures with open tops, facilitating the removal and placement of goods within them.

[0030] The lower end face of the fixed support frame 6 is fixedly connected to the support seat 2. The carriage mounting surface 100 provides a base, and the support seat 2 is fixed on its upper end face for mounting and supporting the entire carriage mechanism. The transmission belt 3 is rotatably connected to the support seat 2 and can move in a specific direction, while the drive motor 31 is responsible for driving the operation of the transmission belt 3. The carriage mechanism consists of a first placement frame 4 slidably connected to both sides of the support seat 2, a connecting plate 7 disposed between the first placement frame 4 and the transmission belt 3, a first sliding assembly that guides the first placement frame 4 to slide, a fixed support frame 6 fixedly connected to the support seat 2 and affecting the movement of the second placement frame 5, a second placement frame 5 slidably connected above the first placement frame 4, and a second sliding assembly, a limiting assembly, and a sliding limiting assembly that maintain the relative position between the second placement frame 5 and the fixed support frame 6. The components work together. When the drive motor 31 starts the transmission belt 3 to rotate, the connecting plate 7 drives the first placement frame 4 to move along the transmission direction and is guided by the first sliding component. Subsequently, the first placement frame 4 drives the adjacent second placement frame 5 to move. With the help of the second sliding component and the limiting component, the multi-layer compartments are unfolded and reset in sequence, ultimately achieving the effect of expanding the refrigerated compartment volume, improving space utilization and loading and unloading convenience.

[0031] Please refer to the details. Figure 1 The drive motor 31 is fixedly mounted on one side of the support base 2, and the drive motor 31 is set as a forward and reverse servo motor. The drive motor 31 can easily drive the transmission belt 3 to rotate in the forward direction to complete the sequential opening of the first placement frame 4 and the second placement frame 5. The drive motor 31 can also easily drive the transmission belt 3 to rotate in the reverse direction to complete the sequential reset of the first placement frame 4 and the second placement frame 5.

[0032] Please refer to the details. Figure 2 and Figure 3The first sliding assembly includes first movable wheels 41 respectively disposed around the lower end face of the first placement frame 4 and first slide rails 21 fixedly disposed on both sides of the upper end face of the support base 2 and adapted to the first movable wheels 41. The first slide rails 21 are arranged along the length direction of the support base 2, and the first slide rails 21 are interference-fitted with the first movable wheels 41. The first sliding assembly consists of the first movable wheels 41 disposed around the lower end face of the first placement frame 4 and the first slide rails 21 fixed on both sides of the upper end face of the support base 2. The function of the first movable wheels 41 is to reduce the friction of the first placement frame 4 during movement, so that the first placement frame 4 can slide smoothly along the support base 2. The first slide rails 21 provide a track to ensure that the first placement frame 4 moves stably along a predetermined path. This design allows the first placement frame 4 to move flexibly on the support base 2 without lateral sliding or deviation. The working principle is as follows: when the first placement frame 4 is subjected to a pushing or pulling force along the length direction of the support seat 2 due to the transmission belt 3, the four first moving wheels 41 of the first placement frame 4 roll on the first slide rail 21. Through the interference fit between the first slide rail 21 and the first moving wheels 41, the first placement frame 4 can move smoothly along the length direction of the support seat 2, which ensures both the smoothness of the movement process and the accuracy of the position.

[0033] Please refer to the details. Figure 1 , Figure 2 and Figure 3 The second sliding assembly includes second moving wheels 521 respectively disposed on both sides of the lower end of the second placement frame 5 relative to the lower end of the first placement frame 4, second slide rails 42 fixedly disposed on both sides of the upper end face of the first placement frame 4, support rods 51 fixedly disposed on both sides of the lower end face of the other end of the second placement frame 5, and third moving wheels 522 fixedly disposed on the lower end face of each support rod 51. The second slide rails 42 are interference-fitted with the second moving wheels 521, and the third moving wheels 522 are interference-fitted with the first slide rails 21. The second moving wheels 521 are installed on both sides of the lower end of the second placement frame 5, enabling the second placement frame 5 to move along the lower slide rails; the second slide rails 42 are fixed on both sides of the upper end face of the first placement frame 4, providing guidance and support for the movement of the second placement frame 5; the support rods 51 are fixed on both sides of the lower end face of the other end of the second placement frame 5 and have the third moving wheels 522, enabling the second placement frame 5 to move along the first slide rails 21, ensuring the stable movement of the second placement frame 5; the third moving wheels 522 ensure that the support rods 51 can slide smoothly along the first slide rails 21. The overall working principle is as follows: through the relative rolling friction between the second moving wheel 521 and the second slide rail 42, and the interference fit between the third moving wheel 522 and the first slide rail 21, the second placement frame 5 can slide left and right along the slide rail below the first placement frame 4, thereby realizing the relative movement between the second placement frame 5 and the first placement frame 4, ensuring that the items placed in the second placement frame 5 can be easily adjusted.

[0034] Please refer to the details. Figure 1 , Figure 2 and Figure 3 The limiting component includes a first baffle 43 fixedly disposed at one end of the first placement frame 4 relative to the first placement frame 4. The first baffle 43 is disposed inside the second moving wheel 521, and the outer diameter of the first baffle 43 is larger than the outer diameter of the second moving wheel 521. When the first placement frame 4 moves out, the first baffle 43 can effectively pull the second moving wheel 521 along its inner side, thereby moving the entire second placement frame 5 out together. When resetting is required, the second moving wheel 521 pulls the first baffle 43, thereby moving the first placement frame 4 back to its original position. Specifically, the first baffle 43 serves to limit and pull, ensuring that the first placement frame 4 remains stable under unexpected circumstances, and also facilitating the movement of the first placement frame 4 according to the pulling of the second moving wheel 521 when needed. The working principle is that when the first placement frame 4 and the second placement frame 5 need to be moved out, the second moving wheel 521 moves under the push of the first baffle 43 through the action of the first baffle 43, thereby driving the second placement frame 5 to move together; when resetting, the second moving wheel 521 pulls the first baffle 43, so that the first baffle 43 drives the first placement frame 4 back to the initial position.

[0035] Please refer to the details. Figure 1 , Figure 4 and Figure 5 The sliding limiting assembly includes a second baffle 53 fixedly disposed at one end of the second placement frame 5 relative to the fixed support frame 6, a guide slider 531 fixedly disposed at the middle position of the upper end surface of the second baffle 53, and guide grooves 61 disposed on both sides of the fixed support frame 6 and adapted to the guide slider 531. The cross-section of the guide grooves 61 is set in a "T" shape, forming the sliding limiting assembly, used to guide and limit the final movement trajectory of the second placement frame 5. The guide slider 531 is fixed at the middle position of the upper end surface of the second baffle 53 and cooperates with the guide grooves 61 on both sides of the fixed support frame 6, so that the second placement frame 5 can slide smoothly along the guide structure without deviation. The guide grooves 61 are designed with a "T" shaped cross-section, which not only provides more stable guidance, but also increases the contact area with the guide slider 531, further preventing sliding deviation during sliding.

[0036] The implementation principle of a refrigerated compartment for cold chain transportation of agricultural products in this application embodiment is as follows: During expansion, the drive motor 31 rotates forward, driving the transmission belt 3 to move, which pulls the first placement frame 4 outward through the connecting plate 7. At this time, the second placement frame 5 remains stationary because it has no direct power and can slide relative to the first placement frame 4. When the first placement frame 4 moves to the point where its first baffle 43 contacts the second moving wheel 521, the first baffle 43 begins to push the second moving wheel 521, thereby driving the second placement frame 5 outward together. During the movement of the second placement frame 5, its guide slider 531 is embedded in the guide groove 61 of the fixed support frame 6, ensuring its smooth linear movement until it is fully expanded. The reset process is the opposite: the drive motor 31 reverses, the transmission belt 3 pushes the first placement frame 4 inward through the connecting plate 7 to reset, and the second placement frame 5 is pulled back to its original position by the interaction between the second moving wheel 521 and the first baffle 43.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A refrigerated van for cold chain transportation of agricultural products, characterized by: It includes a carriage mounting surface (100), a support seat (2) fixedly installed on the upper surface of the carriage mounting surface (100), a transmission belt (3) rotatably connected to the support seat (2), a drive motor (31) for driving the transmission belt (3), and a carriage mechanism installed on the transmission belt (3). The body structure includes a first placement frame (4) slidably connected to both sides of the support base (2), a connecting plate (7) fixedly disposed between the first placement frame (4) and the transmission belt (3) on both sides, a first sliding component disposed between the lower end face of the first placement frame (4) and the upper end face of the support base (2), a second placement frame (5) slidably connected to the upper end face of the first placement frame (4), a second sliding component disposed between the second placement frame (5) and the first placement frame (4) and the support base (2), a limiting component disposed between the second placement frame (5) and the first placement frame (4), a fixed support frame (6) slidably disposed on the upper end face of the second placement frame (5), and a sliding limiting component disposed between the second placement frame (5) and the fixed support frame (6); the lower end face of the fixed support frame (6) is fixedly connected to the support base (2).

2. The cold-chain transport refrigerated van for agricultural products according to claim 1, characterized in that: The drive motor (31) is fixedly mounted on one side of the support base (2), and the drive motor (31) is configured as a forward and reverse servo motor.

3. The cold-chain transport refrigerated van for agricultural products according to claim 2, characterized in that: The first sliding component includes a first movable wheel (41) respectively disposed around the lower end face of the first placement frame (4) and a first slide rail (21) fixedly disposed on both sides of the upper end face of the support base (2) and adapted to the first movable wheel (41). The first slide rail (21) is disposed along the length direction of the support base (2), and the first slide rail (21) is interference-fitted with the first movable wheel (41).

4. The cold-chain transport refrigerated van for agricultural products according to claim 3, characterized in that: The second sliding component includes a second moving wheel (521) respectively disposed on both sides of the lower end of the second placement frame (5) relative to the lower end of the first placement frame (4), a second slide rail (42) fixedly disposed on both sides of the upper end face of the first placement frame (4), a support rod (51) fixedly disposed on both sides of the lower end face of the other end of the second placement frame (5), and a third moving wheel (522) fixedly disposed on the lower end face of each of the support rods (51).

5. The cold chain transport refrigerated container of claim 4, wherein: The second slide rail (42) is interference-fitted with the second moving wheel (521), and the third moving wheel (522) is interference-fitted with the first slide rail (21).

6. The cold chain transport refrigerated container of claim 5, wherein: The limiting component includes a first baffle (43) fixedly disposed at one end of the first placement frame (4) relative to the first placement frame (4), the first baffle (43) being disposed inside the second moving wheel (521), and the outer diameter of the first baffle (43) being larger than the outer diameter of the second moving wheel (521).

7. The cold-chain transport refrigerated van for agricultural products according to claim 6, characterized in that: The sliding limit assembly includes a second baffle (53) fixedly disposed at one end of the second placement frame (5) relative to the fixed support frame (6), a guide slider (531) fixedly disposed at the middle position of the upper surface of the second baffle (53), and guide grooves (61) disposed on both sides of the fixed support frame (6) and adapted to the guide slider (531).

8. The cold-chain transport refrigerated van for agricultural products according to claim 7, characterized in that: The cross-section of the guide groove (61) is set to "T" shape.

9. The cold-chain transport refrigerated van for agricultural products of claim 8, characterized in that: Both the first placement frame (4) and the second placement frame (5) are rectangular frame structures with open tops.

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