Fruit and vegetable pre-cooling storage and transportation integrated device

Abstract

The invention discloses a fruit and vegetable pre-cooling storage and transportation integrated device, and belongs to the technical field of fruit and vegetable pre-cooling storage and transportation, the fruit and vegetable pre-cooling storage and transportation integrated device comprises a pre-cooling box, a refrigeration mechanism, air distribution mechanisms, detection mechanisms and a PLC electric control cabinet, a pre-cooling chamber is located in the pre-cooling box, the detection mechanisms are arranged in the pre-cooling chamber, and the air distribution mechanisms are arranged on the two sides of the pre-cooling chamber; the air distribution mechanism comprises a first air inlet plate, an air exhaust plate, a supporting frame, a winding mechanism and a flexible rubber plate, the first air inlet plate and the air exhaust plate are symmetrically arranged on the two sides of the pre-cooling chamber to form the side wall of the pre-cooling chamber, the supporting frame is installed behind the first air inlet plate and the air exhaust plate, and the flexible rubber plate is installed in the supporting frame in a sliding mode; a second air inlet plate used for adjusting the hole diameter is arranged between the first air inlet plate and the flexible rubber plate, the top end of the flexible rubber plate is wound around a winding mechanism at the top end of the supporting frame, and the bottom end of the flexible rubber plate is connected with a lifting mechanism. Through the arrangement of the air distribution mechanism, accurate control over the air outlet amount is achieved, and the refrigeration and fresh-keeping time of fruits and vegetables is prolonged.

Description

Technical Field

[0001] This invention relates to the field of fruit and vegetable pre-cooling and storage technology, and more specifically to an integrated device for fruit and vegetable pre-cooling and storage. Background Technology

[0002] Precooling refers to the process of rapidly reducing food from its initial temperature (around 25-30℃) to the required refrigeration temperature (0℃-15℃). Precooling is an effective measure to quickly remove field heat, inhibit respiration, maintain the freshness of fruits and vegetables, and extend their shelf life. Precooling preservation is a crucial guarantee for increasing the supply of high-quality fresh fruits and vegetables. Precooling is key to the successful storage of vegetables and other horticultural products and is the first link in establishing a cold chain system.

[0003] Traditional cold storage and transportation equipment suffers from the following technical bottlenecks: Uneven airflow distribution: Existing precooling devices rely on static opening designs, making it impossible to dynamically adjust the aperture size according to the physical characteristics of different fruits and vegetables (e.g., leafy vegetables require low air velocity, while root vegetables require high air volume). Different types and sizes of fruits and vegetables (such as fruits and leafy vegetables) or different packaging methods (e.g., boxed, basketed, stacked) have significantly different requirements for cold air distribution. If the air inlet aperture of the air distribution system is fixed, when the stack height of fruits and vegetables is high, cold air cannot effectively penetrate to the bottom layer, easily causing the upper layer of fruits and vegetables to be overcooled and the bottom layer of fruits and vegetables to be insufficiently precooled. Conversely, if the stack height is low, a fixed large aperture air inlet may cause cold air short-circuiting, reducing the utilization rate of cold air and prolonging the precooling time. Secondly, the stacking status of fruits and vegetables during precooling may be dynamically adjusted according to storage and transportation needs (such as replenishment, sorting, and re-stacking). Traditional air distribution systems with fixed air outlet heights cannot adapt to the new stacking heights, resulting in a reduced contact area between the cold air and the fruits and vegetables, decreased heat exchange efficiency, and ultimately affecting the uniformity of precooling. If this is forcibly compensated by increasing the total air volume, it will not only increase refrigeration energy consumption but may also cause water loss and mechanical damage to the surface of fruits and vegetables (such as berry cracking) due to excessively high local wind speeds.

[0004] In summary, how to provide an integrated pre-cooling, storage, and transportation device for fruits and vegetables that can accurately control temperature and air volume has become a problem that those skilled in the art need to consider. Summary of the Invention

[0005] In view of this, the present invention provides an integrated pre-cooling, storage and transportation device for fruits and vegetables. The present invention achieves precise control of air volume through the setting of the air distribution mechanism, thereby improving the cold storage and preservation time of fruits and vegetables.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pre-cooling and storage integrated device for fruits and vegetables includes a pre-cooling box, a refrigeration mechanism, an air distribution mechanism, a detection mechanism, and a PLC control cabinet. The pre-cooling box contains a pre-cooling chamber, the detection mechanism is located within the pre-cooling chamber, the PLC control cabinet is located at the rear of the pre-cooling box, the refrigeration mechanism is located outside the pre-cooling chamber, and the air distribution mechanism is located on both sides of the pre-cooling chamber. The refrigeration mechanism, air distribution mechanism, and detection mechanism are all electrically connected to the PLC control cabinet. The air distribution mechanism includes a first air inlet plate, an exhaust plate, a support frame, a winding mechanism, and a flexible rubber sheet. The first air inlet plate and exhaust plate are symmetrically arranged on both sides of the pre-cooling chamber, forming the two side walls of the pre-cooling chamber. The support frame is installed behind the first air inlet plate and exhaust plate. The flexible rubber sheet is slidably installed within the support frame. A second air inlet plate for adjusting the aperture is provided between the first air inlet plate and the flexible rubber sheet. The winding mechanism is located at the top of the support frame, and the top of the flexible rubber sheet is wound around the winding mechanism. A lifting mechanism is connected to the bottom of the flexible rubber sheet.

[0008] Furthermore, the second air inlet plate is disposed in the interlayer between the first air inlet plate and the flexible rubber plate, and the lower end of the second air inlet plate is provided with a reciprocating mechanism driven by a lifting mechanism.

[0009] Furthermore, the lifting mechanism includes a dual-axis motor, a drive shaft, a lead screw, a drive block, and a third bevel gear. The dual-axis motor is located at the center of the front end of the support frame. The drive shaft is rotatably arranged on the bottom end of the support frame and is driven by the dual-axis motor through a first bevel gear pair. The lead screw is rotatably arranged in the frames on both sides and is driven by the drive shaft through a second bevel gear pair. The drive block is threaded onto the lead screw. The edge of the flexible rubber plate is edged with iron sheet, and the iron sheet is fixedly connected to the drive block.

[0010] Furthermore, the winding mechanism includes a shrink drum, the inside of which is provided with a winding elastic band.

[0011] Furthermore, the reciprocating mechanism is disposed on both sides of the bottom end of the support frame. The reciprocating mechanism includes a base, a guide rod, a support plate, a first eccentric gear, a second eccentric gear, and an elliptical fixing plate. The base is fixed on the support frame, the guide rod is installed on both sides of the base, the support plate is slidably disposed in the guide rod, and the support plate is fixed to the bottom end of the second air inlet plate. The first eccentric gear is installed on the first base, and the second eccentric gear is installed in the support plate. The first eccentric gear and the second eccentric gear mesh. One end of the elliptical fixing plate is rotatably connected to the shaft of the first eccentric gear, and the other end of the elliptical fixing plate is rotatably connected to the shaft of the second eccentric gear. A driving bevel gear is installed on the drive shaft, and a driven bevel gear is correspondingly installed on the shaft of the first eccentric gear. The driving bevel gear and the driven bevel gear mesh.

[0012] Furthermore, the surfaces of both the first and second air inlet plates are provided with corresponding waist-shaped holes or diamond-shaped holes.

[0013] Furthermore, a flow guide channel is provided at the bottom of the precooling chamber, a grid is provided above the flow guide channel, and a flow guide pipe is connected to the end of the flow guide channel, which is connected to the wastewater tank.

[0014] Furthermore, it also includes a photohydrogen sterilization mechanism, which is arranged at the top of the precooling chamber and is electrically connected to the PLC.

[0015] Furthermore, the detection mechanism includes a distance sensor, which is installed at the top of the pre-cooling chamber and is electrically connected to the PLC control cabinet for detecting the stacking height of the fruit and vegetable transfer boxes.

[0016] Furthermore, the detection mechanism also includes a wind speed sensor and a flow sensor, which are arranged on the fruit and vegetable rack inside the pre-cooling chamber. Both the wind speed sensor and the flow sensor are electrically connected to the PLC control cabinet.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. This invention's system can automatically execute the entire pre-cooling process based on a preset optimal pre-cooling process curve for fruits and vegetables or real-time sensor feedback. This includes intelligent control of airflow, wind speed, cooling temperature, and sterilization, reducing manual intervention and significantly improving the automation, processing efficiency, and consistency of pre-cooling operations. Through the air distribution mechanism, particularly the coordinated design of the liftable flexible rubber plate and the relatively movable first and second air inlets, the system can dynamically and precisely adjust the effective ventilation area and distribution position of the air outlets according to the type and stacking density of fruits and vegetables in the pre-cooling chamber, as well as real-time wind speed / airflow feedback. This adaptive adjustment capability fundamentally solves the problem of unreasonable airflow distribution caused by traditional fixed opening designs, achieving a high degree of adaptability to the physical characteristics of different fruits and vegetables, and significantly improving pre-cooling uniformity and product quality.

[0019] 2. This invention uses a ranging sensor to monitor the actual height of the fruit and vegetable stack in real time. A PLC-controlled lifting mechanism drives a flexible rubber plate to rise and fall synchronously, precisely adjusting the effective air outlet area to match the stack height. Whether low or high stacking, the air outlets can be accurately controlled within the windward side of the goods. This effectively avoids the waste of cooling energy caused by air leakage at the upper openings in low stacking, and the vertical temperature difference problem caused by excessive cooling at the bottom and insufficient cooling at the top in high stacking due to excessive airflow and increased resistance. This ensures the uniformity of pre-cooling effect across the entire batch of goods and significantly improves the efficiency of cooling energy utilization.

[0020] 3. The relative movement design between the first and second air inlet plates of this invention allows for continuous variation in the overlapping area of ​​the perforations on the two plates. This mechanical structure enables stepless adjustment of the ventilation orifice diameter, thereby allowing for extremely precise and wide-range control of the airflow, responding to the optimal airflow demand calculated by the PLC based on sensor data, and further optimizing airflow organization. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the precooling box structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the precooling chamber;

[0023] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0024] Figure 4 This is a schematic diagram of the external lifting structure of the precooling chamber of the present invention;

[0025] Figure 5 for Figure 4 The left view;

[0026] Figure 6 for Figure 4 The right view;

[0027] Figure 7 This is a cross-sectional view of the shrink roll of the present invention;

[0028] Figure 8 This is a schematic diagram of the front structure of the reciprocating mechanism of the present invention;

[0029] Figure 9 This is a schematic diagram of the back structure of the reciprocating mechanism of the present invention.

[0030] In the diagram: 1. Pre-cooling box; 2. PLC control cabinet; 3. First air inlet plate; 4. Exhaust plate; 5. Support frame; 6. Flexible rubber plate; 7. Second air inlet plate; 8. Drive shaft; 9. Lead screw; 10. Drive block; 11. First bevel gear pair; 12. Second bevel gear pair; 13. Shrink drum; 14. Winding rubber band; 15. Base; 16. Guide rod; 17. Support plate; 18. First eccentric gear; 19. Second eccentric gear; 20. Elliptical fixing plate; 21. Guide channel; 22. Grille; 23. Photo-hydrogen sterilization mechanism; 24. Distance sensor; 25. Wind speed sensor; 26. Flow sensor; 27. Fruit and vegetable rack; 28. Dual-axis motor; 29. ​​Third bevel gear pair. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "horizontal," "inner," "outer," and "one side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example 1

[0034] like Figure 1-9 As shown, this invention discloses an integrated pre-cooling, storage, and transportation device for fruits and vegetables. This invention integrates refrigeration, ventilation, detection, sterilization, and drainage functions, and is centrally controlled by a PLC. It allows for precise control of the airflow by adjusting the ventilation holes, enabling long-term preservation of fruits and vegetables, and also facilitates their transportation. The device includes a pre-cooling box 1, a refrigeration mechanism, a ventilation mechanism, a detection mechanism, and a PLC control cabinet 2. The pre-cooling box 1 contains a pre-cooling chamber, the detection mechanism is located inside the pre-cooling chamber, the PLC control cabinet 2 is located at the rear of the pre-cooling box 1, the refrigeration mechanism is located outside the pre-cooling chamber, and the ventilation mechanism is located on both sides of the pre-cooling chamber. The refrigeration mechanism, ventilation mechanism, and detection mechanism are all electrically connected to the PLC control cabinet 2.

[0035] The refrigeration mechanism in this embodiment includes a variable frequency refrigeration compressor (using 404A refrigerant, with a power of 4HP, a cooling capacity of 6920W, and a voltage of 380V), a variable frequency evaporator fan (voltage of 380V, power of 1.01KW, speed of 3010r / min, applicable temperature of -25~60℃, and static pressure up to 1022pa), a condenser fan (the condenser uses copper tubes and aluminum fins, equipped with 3 fans, the number of which can be adjusted according to energy), and a four-way valve (to switch between different refrigerant pipelines to meet different needs), etc., to provide cold air to the pre-cooling chamber. This is a conventional design in the field and will not be described in detail here.

[0036] The air distribution mechanism of the present invention includes a first air inlet plate 3, an exhaust plate 4, a support frame 5, a winding mechanism, and a flexible rubber plate 6. The first air inlet plate 3 and the exhaust plate 4 are symmetrically arranged on both sides of the precooling chamber, forming the side walls of the precooling chamber. The support frame 5 is installed behind the first air inlet plate 3 and the exhaust plate 4. The flexible rubber plate 6 is slidably installed inside the support frame 5. A second air inlet plate 7 for adjusting the aperture is provided between the first air inlet plate 3 and the flexible rubber plate 6. The winding mechanism is provided at the top of the support frame 5. The top of the flexible rubber plate 6 is wound around the winding mechanism. The bottom of the flexible rubber plate 6 is connected to a lifting mechanism.

[0037] Specifically, the second air inlet plate 7 is disposed in the interlayer between the first air inlet plate 3 and the flexible rubber plate 6. Correspondingly arranged waist-shaped holes are formed on the surfaces of both the first air inlet plate 3 and the second air inlet plate 7. A reciprocating mechanism driven by a lifting mechanism is provided at the lower end of the second air inlet plate 7. Through the reciprocating mechanism, the relative position of the second air inlet plate 7 and the first air inlet plate 3 can be changed, thereby altering the overlapping area of ​​the waist-shaped holes and adjusting the size of the air inlet holes.

[0038] In a preferred embodiment of the present invention, the lifting mechanism includes a dual-axis motor 28, a drive shaft 8, a lead screw 9, and a drive block 10. The dual-axis motor 28 is located at the center in front of the bottom end of the support frame 5. The drive shaft 8 is rotatably arranged on both sides of the bottom end of the support frame 5 and is driven by the dual-axis motor 28 through a first bevel gear pair 11. The lead screw 9 is rotatably arranged in the frame on both sides and is driven by the drive shaft 8 through a second bevel gear pair 12. The drive block 10 is threadedly connected to the lead screw 9. The edge of the flexible rubber plate 6 is edged with iron sheet, and the iron sheet is fixedly connected to the drive block 10. Through the lifting mechanism, the flexible rubber plates 6 on both sides of the air inlet and outlet plates can be raised and lowered synchronously, so that the cold air can be directed to cool and preserve the fruits and vegetables. This avoids the waste of cold energy caused by air leakage at the upper holes when stacking low, and the vertical temperature difference problem caused by excessive cooling at the bottom and insufficient cooling at the top when stacking high due to excessive air path and increased resistance. This ensures the uniformity of the pre-cooling effect of the entire batch of goods and greatly improves the efficiency of cold energy utilization.

[0039] As a preferred embodiment of the present invention, the winding mechanism includes a shrink roll 13, and a winding elastic band 14 is provided inside the shrink roll 13, which can realize the automatic retraction of the flexible rubber sheet 6. When the flexible rubber sheet 6 moves upward with the stacking height of fruits and vegetables, the upper flexible rubber sheet 6 will be stored on the shrink roll 13, effectively saving space in the pre-cooling box 1.

[0040] In a preferred embodiment of the present invention, a reciprocating mechanism is disposed on both sides of the bottom end of the support frame 5. The reciprocating mechanism includes a base 15, a guide rod 16, a support plate 17, a first eccentric gear 18, a second eccentric gear 19, and an elliptical fixing plate 20. The base 15 is fixed on the support frame 5, the guide rod 16 is installed on both sides of the base 15, the support plate 17 is slidably disposed in the guide rod 16, and the support plate 17 is fixed to the bottom end of the second air inlet plate 7. The first eccentric gear 18 is installed on the first base 15, and the second eccentric gear 19 is installed in the support plate 17. The first eccentric gear 18 and the second eccentric gear 19 mesh with each other. One end of the elliptical fixing plate 20 is rotatably connected to the shaft of the first eccentric gear 18, and the other end of the elliptical fixing plate 20 is rotatably connected to the shaft of the second eccentric gear 19. A driving bevel gear is installed on the drive shaft 8, and a driven bevel gear is correspondingly installed on the shaft of the first eccentric gear 18. The driving bevel gear and the driven bevel gear mesh with each other to form a third bevel gear pair 29. This design allows the second air inlet plate 7 to reciprocate with the rotation of the drive shaft 8, thereby adjusting the height of the flexible rubber plates 6 on both sides and adjusting the size of the air inlet holes. Combined with the control of the air intake volume, it is possible to achieve fine adjustment for different types of fruits and vegetables and dynamic adjustment for different shelf lives. For example, for leafy vegetables and other perishable fruits and vegetables, the PLC control cabinet can control the mechanism to reduce the ventilation hole diameter to avoid excessive dehydration, while increasing the air volume to quickly remove heat. For root vegetables and other dense fruits and vegetables, the ventilation hole diameter can be increased to ensure pre-cooling efficiency. During storage and transportation, the air inlet hole diameter can be dynamically adjusted adaptively according to the water loss of the fruits and vegetables to maximize the pre-cooling effect and extend the shelf life.

[0041] In a preferred embodiment of the present invention, a guide channel 21 is provided at the bottom of the precooling chamber, and a grid 22 is provided above the guide channel 21. A guide pipe is connected to the end of the guide channel 21 and is connected to the wastewater tank. During the precooling process, the water or condensate released from the fruits and vegetables can flow into the guide channel 21 and the wastewater tank through the grid 22, so as to remove excess humidity in time, avoid water accumulation and damage to the fruits and vegetables, and also help maintain a suitable humidity environment in the precooling chamber.

[0042] In order to achieve sterilization and preservation of fruits and vegetables, a photohydrogen sterilization mechanism 23 is installed at the top of the pre-cooling chamber. The photohydrogen sterilization mechanism 23 is electrically connected to the PLC and performs sterilization treatment while pre-cooling, effectively inhibiting the microbial activity on the surface of fruits and vegetables, extending the shelf life, and improving the hygiene, safety and storage quality of the products.

[0043] In a preferred embodiment of the present invention, the detection mechanism includes a distance sensor 24, a wind speed sensor 25, and a flow sensor 26. The distance sensor 24, wind speed sensor 25, and flow sensor 26 are all electrically connected to the PLC control cabinet 2. The distance sensor 24 is set at the top of the pre-cooling chamber and is used to detect the stacking height of the fruit and vegetable transfer boxes, thereby controlling the lifting height of the flexible rubber plate 6 through the PLC control cabinet 2. The wind speed sensor 25 and flow sensor 26 are arranged on the fruit and vegetable placement rack 27 inside the pre-cooling chamber, which can provide real-time feedback on wind speed and air volume, determine the stacking density, and thus dynamically and accurately adjust the air outlet. This adaptive adjustment capability through the PLC control cabinet 2 fundamentally solves the problem of unreasonable air volume distribution caused by the traditional fixed opening design, achieves a high degree of adaptability to the physical characteristics of different fruits and vegetables, and significantly improves the uniformity of pre-cooling and product quality.

[0044] Example 2

[0045] The difference between this embodiment and embodiment 1 is that, in this embodiment, the surfaces of the first air inlet plate 3 and the second air inlet plate 7 are arranged with diamond-shaped holes, and the edges of the hole inlet and outlet are rounded to reduce airflow separation and eddies, thereby reducing drag loss and noise.

[0046] The purpose of this is that the relatively sharp edges of the waist-shaped holes make it easy for airflow to generate eddies and disturbances, increasing flow resistance, generating noise, and potentially affecting the uniformity of downstream airflow. When the two layers of waist-shaped holes move relative to each other, the rate of change of the overlapping area may not be linear, especially when the overlapping area is very small or very large, which will affect the accuracy and linearity of airflow control.

[0047] When using a rhombus-shaped hole, let the length of the long diagonal (perpendicular to the direction of movement) of the rhombus be H, and the length of the short diagonal (parallel to the direction of movement) be L.

[0048] The maximum overlap area A_max = (H*L) / 2.

[0049] When the board moves a distance x, the overlapping area A(x) = A_max - (H*x) (this is a linear function), and the area decreases linearly from A_max to 0.

[0050] Therefore, during the movement of the second air inlet plate 7, the two boundary lines of the overlapping area of ​​the rhomboid holes remain parallel to the direction of movement and the spacing decreases at a constant speed. The change in the overlapping area is linear. The nonlinearity problem of the overlapping area of ​​the rhomboid holes in Embodiment 1 can be solved simply by replacing the waist-shaped holes with chamfered rhomboid holes, which significantly improves the control accuracy and response performance of the air distribution mechanism.

[0051] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A pre-cooling, storage, and transportation integrated device for fruits and vegetables, characterized in that, The system includes a precooling chamber, a refrigeration mechanism, an air distribution mechanism, a detection mechanism, and a PLC control cabinet. The precooling chamber contains a precooling room, the detection mechanism is located inside the precooling room, the PLC control cabinet is located at the rear of the precooling chamber, the refrigeration mechanism is located outside the precooling room, and the air distribution mechanism is located on both sides of the precooling room. The refrigeration mechanism, air distribution mechanism, and detection mechanism are all electrically connected to the PLC control cabinet. The air distribution mechanism includes a first air inlet plate, an exhaust plate, a support frame, a winding mechanism, and a flexible rubber sheet. The first air inlet plate and exhaust plate are symmetrically arranged on both sides of the precooling room, forming the two side walls of the precooling room. The support frame is installed behind the first air inlet plate and exhaust plate. The flexible rubber sheet is slidably installed within the support frame. A second air inlet plate for adjusting the aperture is provided between the first air inlet plate and the flexible rubber sheet. The winding mechanism is located at the top of the support frame, and the top of the flexible rubber sheet is wound around the winding mechanism. The bottom of the flexible rubber sheet is connected to a lifting mechanism.

2. The integrated pre-cooling, storage, and transportation device for fruits and vegetables according to claim 1, characterized in that, The second air inlet plate is disposed in the interlayer between the first air inlet plate and the flexible rubber plate, and the lower end of the second air inlet plate is provided with a reciprocating mechanism driven by a lifting mechanism.

3. The integrated pre-cooling, storage, and transportation device for fruits and vegetables according to claim 2, characterized in that, The lifting mechanism includes a dual-axis motor, a drive shaft, a lead screw, a drive block, and a third bevel gear. The dual-axis motor is located at the center of the front end of the support frame. The drive shaft is rotatably arranged on the bottom end of the support frame and is driven by the dual-axis motor through a first bevel gear pair. The lead screw is rotatably arranged in the frames on both sides and is driven by the drive shaft through a second bevel gear pair. The drive block is threaded onto the lead screw. The edge of the flexible rubber plate is edged with iron sheet, and the iron sheet is fixedly connected to the drive block.

4. The integrated pre-cooling, storage, and transportation device for fruits and vegetables according to claim 1, characterized in that, The winding mechanism includes a shrinking drum, and the shrinking drum has a winding elastic band inside.

5. The integrated pre-cooling, storage, and transportation device for fruits and vegetables according to claim 3, characterized in that, The reciprocating mechanism is located on both sides of the bottom end of the support frame. The reciprocating mechanism includes a base, a guide rod, a support plate, a first eccentric gear, a second eccentric gear, and an elliptical fixing plate. The base is fixed on the support frame. The guide rod is installed on both sides of the base. The support plate is slidably disposed in the guide rod. The support plate is fixed to the bottom end of the second air inlet plate. The first eccentric gear is installed on the first base. The second eccentric gear is installed in the support plate. The first eccentric gear and the second eccentric gear mesh. One end of the elliptical fixing plate is rotatably connected to the shaft of the first eccentric gear. The other end of the elliptical fixing plate is rotatably connected to the shaft of the second eccentric gear. A driving bevel gear is installed on the drive shaft. A driven bevel gear is correspondingly installed on the shaft of the first eccentric gear. The driving bevel gear and the driven bevel gear mesh.

6. The integrated pre-cooling, storage, and transportation device for fruits and vegetables according to claim 1, characterized in that, The surfaces of the first and second air inlet plates are respectively arranged with waist-shaped holes or diamond-shaped holes.

7. The integrated pre-cooling, storage, and transportation device for fruits and vegetables according to claim 1, characterized in that, The bottom of the precooling chamber is provided with a flow guide channel, the top of the flow guide channel is covered with a grid, and the end of the flow guide channel is connected to a flow guide pipe, which is connected to the wastewater tank.

8. The integrated pre-cooling, storage, and transportation device for fruits and vegetables according to claim 1, characterized in that, It also includes a photohydrogen sterilization mechanism, which is arranged at the top of the precooling chamber and is electrically connected to the PLC.

9. The integrated pre-cooling, storage, and transportation device for fruits and vegetables according to claim 1, characterized in that, The detection mechanism includes a distance measuring sensor, which is installed at the top of the pre-cooling chamber and is electrically connected to the PLC control cabinet. It is used to detect the stacking height of the fruit and vegetable transfer boxes.

10. The integrated pre-cooling, storage, and transportation device for fruits and vegetables according to claim 1, characterized in that, The detection mechanism also includes a wind speed sensor and a flow sensor, which are arranged on the fruit and vegetable racks inside the pre-cooling chamber. Both the wind speed sensor and the flow sensor are electrically connected to the PLC control cabinet.

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