Movable container type differential pressure pre-cooling and ripening integrated device

Abstract

The present application relates to a kind of mobile container type differential pressure precooling ripening integrated device, belong to fruit and vegetable postharvest processing technical field, including container, inside being equipped with intermediate air supply passage and both sides return air passage, between both fruit and vegetable placement area;Intermediate air supply passage top is equipped with ceiling cold fan, inside is equipped with flow guide wind shield mechanism;Return air passage top is equipped with differential pressure fan, inside is equipped with grid aperture plate device next to fruit and vegetable placement area side;Refrigeration system and for carrying out the reversing valve of refrigeration and heating mode conversion.The present application realizes temperature control ripening by reversing valve, reduces the use of exogenous ethylene;Through the air flow mode of intermediate air supply, both sides return air, one side air flow path is short, flow resistance is small, cooperate flow guide wind shield mechanism and grid aperture plate device, make air flow uniform through fruit and vegetable area, eliminate dead angle;Multiple sealing structure prevents air flow short circuit.Integrated in container, can realize "production place-transportation-market" continuous operation, reduce postharvest loss, extend shelf life.

Description

Technical Field

[0001] This invention relates to post-harvest processing equipment technology for fruits and vegetables, specifically to a mobile containerized pressure differential precooling and ripening integrated device. Background Technology

[0002] Post-harvest processing of fruits and vegetables is a crucial step in extending shelf life and improving product quality. For post-ripening fruits such as kiwifruit, pre-cooling is necessary after harvesting to inhibit respiration and metabolism, followed by artificial ripening to bring them to their optimal edible state.

[0003] In recent years, to meet the needs of mobile and multifunctional processing, containerized pressure differential precooling and ripening devices have emerged. Among them, Chinese patent CN221099091U discloses a "containerized ripening pressure differential rapid cooling dual-effect cabinet." This patent uses a standard shipping container as the insulated body, integrating a refrigeration unit, a pressure differential ventilation system, and a ripening gas release device. By setting up air ducts, pressure differential fans, and air guide plates inside the container, a pressure differential environment is created, forcing cold air or ripening gas through the fruit and vegetable packaging box, thereby achieving rapid cooling and uniform ripening, and also enabling mobile and multifunctional processing.

[0004] However, the above-mentioned existing technical solutions still have the following shortcomings: First, the ripening technology is outdated, affecting fruit quality. This device relies solely on exogenous ethylene for ripening, which has a strong effect and easily leads to deterioration of fruit flavor, rapid decrease in firmness, and a significant reduction in storage resistance, resulting in a significantly shortened shelf life. It also lacks ripening methods based on temperature control.

[0005] Second, the airflow distribution is uneven, resulting in poor treatment consistency. The device uses fixed air ducts or simple air guides, failing to form an optimized "central supply and side return" airflow pattern. The airflow path is long, the flow resistance is high, and there is a lack of uniform air supply structures such as layered guide vanes and inter-row diversion baffles, which leads to the airflow not being evenly distributed to the goods on each layer. On the return air side, there is no uniform return air structure, with excessive negative pressure near the fan section and insufficient negative pressure at the far end, resulting in inconsistent treatment effects for goods in different locations within the container.

[0006] Third, the sealing structure has poor reliability and is prone to airflow short circuits. The device does not have an anti-airflow short circuit structure between the upper layer of the goods and the bottom of the pallet. Cold air or ripening gas can easily flow back directly from the upper layer of the goods or the bottom of the pallet, resulting in a significant increase in the energy consumption of the differential pressure system and a sharp decrease in the cooling rate.

[0007] Fourth, the device suffers from low functional integration and a lack of precise control. It is not equipped with a heat pump heating system, making it impossible to achieve energy-efficient and temperature-controlled ripening; furthermore, it lacks a humidification system and an ozone ethylene removal system, hindering precise control of the processing environment.

[0008] Therefore, there is an urgent need for an integrated post-harvest processing device for fruits and vegetables that can simultaneously achieve rapid precooling and high-quality ripening, uniform airflow, reliable sealing, and portability. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a containerized pressure differential precooling and ripening integrated device that can achieve rapid precooling and high-quality ripening, uniform airflow, reliable sealing and mobility.

[0010] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A mobile containerized pressure differential precooling and ripening integrated device includes: The container is equipped with a central air supply channel and return air channels on both sides of the central air supply channel. The area between the central air supply channel and the return air channels on both sides is a fruit and vegetable storage area. The top of the intermediate air supply channel is equipped with a ceiling-mounted air cooler, and the interior of the intermediate air supply channel is equipped with a flow guiding and wind-blocking mechanism; The top of the return air duct is equipped with a differential pressure fan, and the side of the duct adjacent to the cargo is equipped with a perforated grid plate device. A refrigeration system for providing cooling or heating to the interior of the container; A reversing valve, which is connected to the refrigeration system, is used to switch the refrigerant flow direction so that the container can switch between refrigeration mode and heating mode. A windproof structure is installed inside the container to prevent airflow short-circuiting.

[0011] The beneficial effects of this invention are as follows: temperature control and ripening are achieved through a refrigeration system and a reversing valve for switching between refrigeration and heating modes, reducing the use of external ethylene and extending the shelf life of fruits; the airflow pattern of central air supply and side return air results in a short airflow path on each side and low flow resistance, which, combined with the flow guiding and sealing components and the grid perforated plate device, ensures that the airflow passes evenly through the fruit and vegetable placement area, eliminating processing dead zones; the sealing and windproof structure effectively prevents airflow short-circuiting and reduces energy consumption; and the entire system is integrated into a container, enabling continuous operation from production site to transportation to market, reducing post-harvest losses.

[0012] Furthermore, the airflow guiding and wind-blocking mechanism includes a movable base, and a partition plate perpendicular to the movable base is provided in the middle of the movable base. The two sides of the partition plate are respectively opposite to the two return air channels. It also includes a vertical sliding guide rail and multiple guide plate groups that are vertically spaced along the vertical sliding guide rail. Each guide plate group includes two guide plates, and the two guide plates of each guide plate group are symmetrically arranged on both sides of the partition plate. The distance between the two guide vanes and the partition plate in each guide vane group decreases from top to bottom; Each guide plate assembly has two guide plates that are adjustablely connected to a vertical sliding rail via a horizontal slide rail. Each guide plate is also adjustablely connected to the horizontal slide rail.

[0013] The beneficial effects of adopting the above-mentioned further solution are as follows: the intermediate air supply channel is divided into two independent channels by the partition plate. When the ceiling-mounted air cooler is started, the air supply air enters from the top of the intermediate air supply channel and flows downward on both sides of the partition plate. The differential pressure fans on both sides start at the same time, which creates negative pressure in the return air channel. Under the negative pressure of the return air channel, the airflow on both sides of the partition plate is evenly guided to the fruit and vegetable placement areas on both sides, avoiding mutual interference of airflow. The airflow flows back into the ceiling-mounted air cooler, forming a complete airflow cycle, thereby achieving continuous and uniform airflow, ensuring the stability of the temperature field during pre-cooling and ripening, and improving heat exchange efficiency. Multiple sets of vertically spaced deflectors guide airflow at different heights in layers, resulting in a more uniform airflow distribution between upper and lower layers. This prevents airflow from concentrating on one layer and causing excessively low wind speeds in other layers. Airflow flows from top (near the windward end) to bottom (far from the windward end). The upper deflectors, being farther from the partitions, direct most of the airflow downwards, while some is redirected by the deflectors and enters the fruit and vegetable placement areas on both sides. The lower deflectors, closer to the partitions, compensate for the naturally attenuated wind pressure due to their greater distance from the fan, ensuring a more even distribution of airflow across the fruit and vegetable placement areas. This gradually varying distance arrangement achieves an optimal balance between reversing efficiency and resistance compensation for the deflectors from top to bottom, significantly improving the consistency of the oncoming wind speed across layers and eliminating uneven vertical treatment. In addition, the distance between the baffles in each baffle assembly and the partition plate can be adjusted through the adjustable connection with the horizontal and vertical sliding rails. This allows for precise airflow distribution based on the actual stacking density and resistance characteristics of each layer of fruit and vegetable baskets, effectively eliminating vertical temperature differences and dead zones, and further improving the uniformity and flexibility of airflow distribution.

[0014] Furthermore, the airflow guiding and wind-blocking mechanism also includes a horizontal wind-blocking plate, a side wind-blocking plate, and a sealing strip; The horizontal windbreak is fixed to the movable base; The side baffle is fixed to the side of the movable base; Sealing strips are installed at the joint between the horizontal windbreak and the side windbreak.

[0015] The beneficial effects of adopting the above-mentioned further solution are as follows: the horizontal baffle is fixed on the movable base to seal the gap between the bottom of the middle air supply channel and the bottom of the container; the side baffle is fixed on the side of the movable base to seal the gap between the movable base and the side wall of the pallet; the sealing strips embedded at the joints of the two further enhance the sealing effect, effectively preventing airflow from short-circuiting from the bottom and sides of the goods, forcing the air supply airflow through the fruit and vegetable placement area according to the designed path, thereby improving the heat exchange efficiency in the pressure differential precooling and ripening process, reducing air volume loss and pressure differential loss, reducing fan energy consumption, and ensuring the stability and uniformity of airflow distribution.

[0016] Furthermore, the bottom of the movable base is also equipped with casters.

[0017] The advantages of adopting the above-mentioned further solutions are: the casters facilitate the overall movement of the diversion and sealing components into or out of the container, simplifying cargo loading and unloading operations and improving the ease of use of the equipment.

[0018] Furthermore, the container is an insulated container, and the fruit and vegetable placement area is equipped with trays for stacking perforated fruit and vegetable baskets.

[0019] The beneficial effects of adopting the above-mentioned further solutions are: the insulated container provides a good thermal insulation environment, the pallet is used to neatly stack perforated fruit and vegetable baskets to form an equal-gap airflow channel, which facilitates the uniform flow of air and is also easy for forklift handling, adapting to the standardized operation of cold chain logistics.

[0020] Furthermore, windproof roller shutters are installed above both return air ducts; The windproof roller shutter includes an electric roller and a windproof cloth; One end of the windproof cloth is fixedly connected to the electric roller and wound around the electric roller; The other end of the windproof cloth is equipped with a hook, which is used to hang the top fruit and vegetable basket on the side near the middle air supply channel.

[0021] The beneficial effects of adopting the above-mentioned further solution are: after the windproof roller shutter is unfolded, it covers the top fruit and vegetable basket, and the hook is fixed on the side of the top fruit basket near the middle air supply channel. This can effectively prevent the airflow from short-circuiting from above the top fruit and vegetable basket, ensure that the pressure difference is fully applied to the fruit and vegetable placement area, improve the pre-cooling and ripening efficiency, and is simple to operate.

[0022] Furthermore, the perforated plate device includes a perforated rectifier plate and multiple layers of louvers located on one side of the perforated rectifier plate and arranged longitudinally along the perforated rectifier plate. Each louver is fixedly connected to a gear at its end, and both ends of each louver are rotatably connected to a frame connected to the perforated rectifier plate.

[0023] The beneficial effects of adopting the above-mentioned further scheme are: the porous rectifier plate rectifies the airflow entering the fruit and vegetable placement area, so that the airflow changes from a turbulent state to a uniform and stable laminar flow state; the multi-layer louvers drive each louver to deflect synchronously through gear transmission, which is compact in structure, easy to adjust, and can change the flow area to adjust the resistance on the return air side.

[0024] Furthermore, the multi-layer louvers are divided into multiple independent adjustment zones, each with its own independent adjustment mechanism. The gears connected to the ends of the louvers in the same independent adjustment zone mesh with each other and are connected to their corresponding adjustment mechanisms.

[0025] The beneficial effects of adopting the above-mentioned further scheme are as follows: by dividing the multi-layer louvers into multiple independent adjustment zones and setting independent adjustment mechanisms for each zone, the opening of the louvers in each zone can be adjusted independently for different height positions, thereby changing the local resistance at different heights and compensating for the negative pressure gradient caused by the different distances from the differential pressure fan: the opening of the section near the fan (usually the upper part) is appropriately reduced to increase resistance, and the opening of the section far from the fan (usually the lower part) is appropriately increased to reduce resistance, so that the negative pressure at each point in the vertical direction on the return air side tends to be balanced, and each layer of the fruit and vegetable placement area obtains uniform return air suction, which significantly improves the uniformity of airflow distribution and the consistency of treatment effect during pre-cooling and ripening.

[0026] Preferably, the adjustment mechanism is an adjustment knob, wherein the adjustment knob is provided with a mechanical gear limit structure, which can fix different deflection angles, such as realizing three-level opening adjustment: fully open, half open, and slightly open.

[0027] Furthermore, the refrigeration system is an air-cooled refrigeration unit, including a compressor, a condenser, and an evaporator; The ceiling-mounted air cooler includes a casing and an external rotor fan; The external rotor fan is fixed in the fan mounting hole at the bottom of the outer casing. The fan mounting hole is directly opposite the middle air supply channel. There are two evaporators, which are fixed in the air inlets of the cold air fans on both sides of the outer casing. The air inlets of the two cold air fans are respectively opposite to the air outlets of the two return air channels. The reversing valve has four ports, wherein the first port is connected to the compressor's exhaust port, the second port is connected to the condenser, the third port is connected to the evaporator, and the fourth port is connected to the compressor's suction port. The reversing valve has a first working state and a second working state. In the first working state, the reversing valve connects the compressor's exhaust port to the condenser and the evaporator to the compressor's suction port to achieve a cooling mode. In the second working state, the reversing valve connects the compressor's exhaust port to the evaporator and the condenser to the compressor's suction port to achieve a heating mode. It also includes an equipment end, which is located outside the container, and the compressor, condenser and ethylene generator are all installed inside the equipment end; The device also contains an ozone generator, a humidifier, and a control box. The control box is equipped with a controller, and the container is also equipped with an ethylene concentration sensor and a temperature and humidity sensor. The compressor, reversing valve, ethylene generator, ozone generator, humidifier, differential pressure fan, external rotor fan, ethylene concentration sensor, and temperature and humidity sensor are all electrically connected to the controller. The output end of the ethylene generator is connected to the ethylene pipeline; The output terminals of both the ozone generator and the humidifier are connected to the humidification and ozone pipelines. The ethylene pipeline and the humidification and ozone pipeline are all connected to the interior of the container.

[0028] The beneficial effects of adopting the above-mentioned further scheme are as follows: By installing the external rotor fan of the ceiling-mounted air cooler at the bottom of the outer casing directly opposite the central air supply channel, and fixing the evaporators on both sides to the air cooler inlets on both sides of the outer casing, the airflow enters the evaporators from the return air channels on both sides for heat exchange, and then is concentrated and sent downward into the central air supply channel by the external rotor fan, forming a compact and efficient airflow circulation path, reducing duct bends and resistance losses, and improving heat exchange efficiency; at the same time, the outer casing can effectively prevent cold and hot air leakage and reduce energy loss; the reversing valve enables flexible switching between cooling and heating, thereby achieving precise temperature control, assisting in ethylene, ozone ethylene removal and humidification functions, allowing the device to flexibly switch between pre-cooling and ripening modes, with temperature ripening as the main method and external ethylene as a supplement, effectively avoiding the deterioration of fruit flavor, rapid decrease in firmness and shortened shelf life caused by single ethylene ripening; Based on feedback from ethylene concentration and temperature / humidity sensors, the controller automatically adjusts cooling, heating, humidification, ozone ethylene removal, and ethylene replenishment to achieve closed-loop precise control of the container's internal environment, ensuring the stability and consistency of the pre-cooling and ripening processes. Ethylene, humidification, and ozone pipelines respectively deliver ethylene, ozone, and moisture into the container, assisting ripening as needed and promptly decomposing excess ethylene while maintaining suitable humidity, thereby effectively extending the shelf life of the fruit and increasing its marketability. Simultaneously, the compressor, condenser, ethylene generator, ozone generator, humidifier, and control box are centrally installed in the equipment end outside the container, forming a modular and compact layout. This facilitates the movement and maintenance of the entire machine without occupying internal container space, maximizing the use of internal space for fruit and vegetable storage, avoiding functional modules from taking up internal volume, and preventing direct contact between electrical and refrigeration components and fruits and vegetables, ensuring food safety and equipment operational safety.

[0029] Furthermore, the wind-blocking structure also includes a tapered wind deflector and a front wind deflector; the tapered wind deflector is located between the air outlet of the ceiling-mounted air cooler and the inlet of the intermediate air supply channel, and the cross-sectional area of ​​its airflow channel gradually decreases along the airflow direction; there are two front wind deflectors, which are respectively located inside the container on the door side and in front of the fruit and vegetable placement areas on both sides of the intermediate air supply channel.

[0030] The beneficial effects of adopting the above-mentioned further scheme are as follows: the tapered baffle guides the airflow to the middle air supply channel. During the longitudinal transport of the airflow along the middle air supply channel, the dynamic pressure is converted into static pressure through the turning and diversion effect of the baffle mechanism, and enters the fruit and vegetable placement areas on both sides at an appropriate speed. The front baffle set on the door side can adjust the gap of the airflow channel, preventing the airflow from directly short-circuiting back on the door side. This forces the airflow that passes through the fruit and vegetable area laterally to return through the return air channel, forming a complete pressure differential loop. This ensures that the whole box of goods (especially the goods on the door side) receives a uniform air volume, and improves the batch consistency of pre-cooling and ripening. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a mobile containerized differential pressure precooling and ripening integrated device according to the present invention. Figure 2 This is a schematic diagram of the internal equipment of the container in a mobile containerized differential pressure precooling and ripening integrated device of the present invention. Figure 3 This is a schematic diagram of the grid perforated plate device in a mobile containerized differential pressure precooling and ripening integrated device of the present invention; Figure 4 This is a schematic diagram of the flow guiding and wind-blocking mechanism in a mobile containerized differential pressure precooling and ripening integrated device of the present invention; Figure 5 This is a partial schematic diagram of the cooperation between the tray and the flow guiding and windproof mechanism in a mobile containerized differential pressure precooling and ripening integrated device of the present invention. Figure 6 This is a schematic diagram of the windbreak roller shutter in a mobile containerized differential pressure precooling and ripening integrated device of the present invention; Figure 7 This is a schematic diagram of the ceiling-mounted air cooler in a mobile containerized differential pressure precooling and ripening integrated device of the present invention; Figure 8 This is a schematic diagram of the arrangement of fruit and vegetable baskets inside a container in a mobile containerized differential pressure precooling and ripening integrated device of the present invention. Figure 9 This is a partially enlarged schematic diagram of the flow guiding and wind-blocking mechanism in a mobile containerized differential pressure precooling and ripening integrated device of the present invention; Figure 10This is a schematic diagram of the airflow circulation during the precooling stage of a mobile containerized pressure differential precooling and ripening integrated device according to the present invention.

[0032] The attached diagram lists the components represented by each number as follows: 1. Equipment end; 2. Container; 3. Air-cooled refrigeration unit; 4. Condenser; 5. Ethylene generator; 6. Ozone generator; 7. Humidifier; 8. Control box; 9. Perforated grille device; 901. Louver; 902. First adjustment knob; 903. Gear; 904. Second adjustment knob; 905. Third adjustment knob; 906. Perforated rectifier plate; 10. Tray; 11. Front windshield; 12. Airflow deflector mechanism; 1201. Divider plate; 1202. Vertical sliding guide rail; 1203. Lock 1204. Tightening mechanism; 1205. Sliding component; 1206. Lateral slide rail; 1207. Deflector; 1208. Horizontal wind deflector; 1209. Side wind deflector; 1210. Sealing strip; 13. Casters; 14. Windproof roller shutter; 15. Electric roller shaft; 16. Windproof cloth; 17. Hook; 18. Ethylene pipeline; 19. Humidification and ozone pipeline; 10. Ceiling-mounted evaporative cooler; 11. Evaporator; 12. External rotor fan; 12. Differential pressure fan; 13. Gradual reducing wind deflector. Detailed Implementation

[0033] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0034] See Figures 1-10 This embodiment provides a mobile containerized pressure differential precooling and ripening integrated device, comprising: Container 2, which is equipped with a central air supply channel and return air channels on both sides of the central air supply channel, and the area between the central air supply channel and the return air channels on both sides is a fruit and vegetable storage area. The top of the intermediate air supply channel is equipped with a ceiling-mounted air cooler 16, and the interior of the intermediate air supply channel is equipped with a flow guiding and wind-blocking mechanism 12. The top of the return air duct is equipped with a differential pressure fan 17, and the side of the return air duct adjacent to the fruit and vegetable placement area is equipped with a perforated grid plate device 9. A refrigeration system for providing cooling or heating to the interior of the container; A reversing valve, which is connected to the refrigeration system, is used to switch the refrigerant flow direction so that the container can switch between refrigeration mode and heating mode. A windproof structure is installed inside the container to prevent airflow short-circuiting.

[0035] The air-cooled refrigeration unit 3 includes a compressor, a condenser 4, and an evaporator 1601. The ceiling-mounted air cooler 16 includes an external rotor fan 1602. The external rotor fan 1602 is fixed in a fan mounting hole at the bottom of the outer casing, the fan mounting hole being directly opposite the central air supply channel. There are two evaporators 1601, each fixed in an air inlet on one side of the outer casing, and the air inlets of the two air coolers are respectively opposite the air outlets of the two return air channels (e.g.,...). Figure 2 and 7 (As shown).

[0036] The compressor, condenser 4, and evaporator 1601 are connected via a reversing valve (four-way reversing valve). Specifically: The reversing valve has four ports: the first port is connected to the compressor's exhaust port, the second port is connected to the condenser 4, the third port is connected to the evaporator 1601, and the fourth port is connected to the compressor's suction port. The reversing valve has a first operating state and a second operating state. In the first operating state, the reversing valve connects the compressor's exhaust port to the condenser 4 and the evaporator 1601 to the compressor's suction port to achieve a cooling mode. In the second operating state, the reversing valve connects the compressor's exhaust port to the evaporator 1601 and the condenser 4 to the compressor's suction port to achieve a heating mode.

[0037] In cooling mode, the refrigerant flows sequentially through the compressor, reversing valve, condenser 4, throttling device, and evaporator 1601 before returning to the compressor. The evaporator 1601 absorbs heat, and the external rotor fan 1602 blows out cold air.

[0038] In heating mode, the control box 8 issues a command to switch the reversing valve to the connected state, so that the high-temperature and high-pressure refrigerant discharged by the compressor first flows through the evaporator 1601 to release heat, and the external rotor fan 1602 blows out hot air to realize the heat pump heating acceleration.

[0039] like Figure 4 As shown, in this embodiment, the airflow guiding and wind-blocking mechanism 12 includes a movable base. A partition plate 1201 perpendicular to the movable base is provided in the middle of the movable base, and the two sides of the partition plate 1201 are respectively opposite to two return air channels. It also includes a vertical sliding guide rail 1202 and multiple airflow guide plate groups vertically spaced along the vertical sliding guide rail 1202. Each airflow guide plate group includes two airflow guide plates 1206, symmetrically arranged on both sides of the partition plate 1201. The distance between the two airflow guide plates 1206 and the partition plate 1201 in each airflow guide plate group decreases sequentially from top to bottom. The two airflow guide plates 1206 in each airflow guide plate group are adjustablely connected to the vertical sliding guide rail 1202 via a horizontal slide rail 1205, and each airflow guide plate is adjustablely connected to the horizontal slide rail 1205.

[0040] Specifically, such as Figure 4 and 9As shown, the vertical sliding guide rail 1202 includes two sets, two rails in each set, which are fixed to the two ends of opposite sides of the movable base and extend vertically upward. A sliding member 1204 is fixed to the end of each of the two guide plates 1206 of the guide plate set and the end of each horizontal slide rail 1205. The sliding member 1204 at the end of the guide plate 1206 slides in engagement with the horizontal slide rail 1205 and is fixed to the horizontal slide rail 1205 by locking screws. The sliding member 1204 at the end of the horizontal slide rail 1205 slides in engagement with the vertical sliding guide rail 1202 and is fixed to the vertical sliding guide rail 1202 by locking mechanism 1203.

[0041] With the above structure, the operator can move the transverse slide rail 1205 up and down along the vertical sliding guide rail 1202, thereby changing the overall height of the guide plate assembly to accommodate different stacking layers; and move the guide plate 1206 horizontally along the transverse slide rail 1205 to adjust the distance between the guide plate and the partition plate 1201. After adjustment, the sliding member 1204 is locked and fixed by the locking mechanism 1203 to ensure that each guide plate assembly is fixed, wherein the locking mechanism can be a locking screw.

[0042] The aforementioned adjustable connection structure allows the lateral position and vertical height of each guide plate 1206 to be adjusted independently, thereby achieving refined airflow distribution based on the actual stacking density and resistance characteristics of each layer of fruit and vegetable baskets, effectively eliminating vertical temperature differences and processing dead angles, and further improving the uniformity and flexibility of airflow distribution.

[0043] In addition, such as Figure 5 As shown, the airflow deflector mechanism 12 also includes a horizontal baffle 1207, a side baffle 1208, and a sealing strip 1209. The horizontal baffle 1207 is fixed to the movable base and is used to seal the gap between the bottom of the intermediate air supply channel and the bottom of the container 2. The side baffle 1208 is fixed to the side of the movable base and is used to seal the gap between the movable base and the side wall of the pallet 10. The sealing strip 1209 is installed at the joint between the horizontal baffle 1207 and the side baffle 1208. The bottom of the movable base is also equipped with casters 1210.

[0044] like Figure 3As shown, in this embodiment, the perforated plate device 9 includes a perforated rectifier plate 906 and multiple layers of louvers 901 located on one side of the perforated rectifier plate 906 and arranged longitudinally along the perforated rectifier plate 906. A gear 903 is fixedly connected to the end of each louver 901, and both ends of each louver 901 are rotatably connected to a frame connected to the perforated rectifier plate 906. The gear 903 is fixedly connected to the end of the louver 901 via a gear shaft, which is rotatably connected to the frame. The gears 903 at the ends of adjacent louvers 901 mesh with each other to form a gear transmission chain. One gear 903 at the end of one louver 901 acts as a driving wheel, and by adjusting the mechanism, the driving wheel is rotated, thereby driving all louvers 901 in the transmission chain to deflect synchronously.

[0045] In this embodiment, the multi-layer louvers 901 are divided into multiple independent adjustment zones (such as upper, middle, and lower independent adjustment zones), and each independent adjustment zone is equipped with an independent adjustment mechanism (such as a first adjustment knob 902, a second adjustment knob 904, and a third adjustment knob 905). The gears 903 connected to the ends of each louver 901 in the same independent adjustment zone mesh with each other and are connected to their corresponding adjustment mechanisms for transmission. The adjustment knobs are equipped with mechanical position limit structures, which can realize three opening levels: fully open, half open, and slightly open.

[0046] like Figure 2 As shown, in this embodiment, the wind-blocking structure includes a tapered wind deflector 18 positioned between the air outlet of the ceiling-mounted evaporative cooler 16 and the inlet of the intermediate air supply channel, and front wind deflectors 11 positioned on the door-side of the fruit and vegetable placement areas on both sides of the intermediate air supply channel. Furthermore, wind-blocking roller blinds 13 are provided above both return air channels. The wind-blocking roller blind 13 includes an electric roller 1301 and a wind-blocking cloth 1302. One end of the wind-blocking cloth 1302 is fixedly connected to and wound around the electric roller 1301, and the other end is provided with a hook 1303. The hook 1303 is used to hang on the side of the topmost fruit and vegetable basket near the intermediate air supply channel, see details below. Figure 6 .

[0047] like Figure 1 As shown, it also includes equipment end 1, which is located outside container 2. The compressor, condenser 4, and ethylene generator 5 are all installed inside equipment end 1. Ozone generator 6, humidifier 7, and control box 8 are also installed inside equipment end 1.

[0048] The control box 8 is equipped with a controller, and the container 2 is also equipped with an ethylene concentration sensor and a temperature and humidity sensor.

[0049] The compressor, reversing valve, ethylene generator 5, ozone generator 6, humidifier 7, differential pressure fan 17, external rotor fan 1602, ethylene concentration sensor, and temperature and humidity sensor are all electrically connected to the controller.

[0050] The compressor and condenser 4 are connected via a refrigerant line. The output of the ethylene generator 5 is connected to the ethylene line 14. The outputs of both the ozone generator 6 and the humidifier 7 are connected to the humidification and ozone line 15. The ethylene line 14 and the humidification and ozone line 15 are both connected to the interior of container 2.

[0051] Working principle: (1) Pre-cooling stage: The special ventilated fruit and vegetable basket containing kiwifruit was placed according to... Figure 8 Stack the fruit baskets according to the rules shown on pallet 10, ensuring that the ventilation holes of adjacent baskets are aligned to form a continuous airflow channel. Push the airflow guide and baffle mechanism 12 into the central air supply channel and position it. Unfold the airflow baffle curtain 13 and hang the hook 1303 on the side of the top basket closest to the central air supply channel. Close the container door.

[0052] The target temperature, humidity, and pre-cooling time are set via control box 8. The controller starts the ceiling-mounted evaporative air cooler 16 and the differential pressure fan 17, while the reversing valve maintains the cooling mode. Cold air enters the central air supply channel from the outlet of the ceiling-mounted evaporative air cooler 16 through the tapered baffle 18, flows downwards on both sides of the partition plate 1201, and is evenly diverted by the guide plates 1206 to enter the fruit and vegetable placement areas on both sides. The cold air passes through the gaps between the fruit and vegetable baskets, exchanges heat with the fruit, and then flows out from both sides of the fruit and vegetable placement area. After being rectified by the perforated rectifier plate 906, and then having its opening adjusted by the louvers 901 of each section of the perforated plate device 9, it is drawn in by the differential pressure fan 17 and returned to the ceiling-mounted evaporative air cooler 16, forming a circulation (e.g., ...). Figure 10 (As shown).

[0053] During the process, humidifier 7 automatically humidifies based on feedback from the humidity sensor to ensure a constant relative humidity. If the ethylene concentration sensor detects excessive ethylene levels, the controller automatically starts ozone generator 6, which delivers ozone into the container through the humidification and ozone pipeline 15 to decompose excess ethylene.

[0054] (2) Ripening stage: After precooling, the controller automatically or manually switches to ripening mode. A ripening curve is set according to the kiwi fruit variety (e.g., heat shock 20-25℃ / 12-24 hours, ripening 15-18℃ / 24-48 hours, inhibition 0-2℃ / 4-6 hours). The controller instructs the reversing valve to switch, and the refrigeration system switches to heat pump heating mode, causing the evaporator 1601 to release heat, and the external rotor fan 1602 to blow out hot air. The hot air circulates along the same airflow path as in the precooling stage, controlling the temperature and ripening the fruit.

[0055] If the fruit's maturity does not reach the target value after the heat shock and ripening stages, the controller activates the ethylene generator 5, supplementing the container with trace amounts of ethylene (concentration controlled at 10-100 ppm) through the ethylene pipeline 14 to assist ripening. The ethylene concentration sensor monitors the concentration in real time; if it exceeds the limit, the ozone generator 6 is immediately activated to decompose it. During the ripening process, the humidifier operates continuously to maintain suitable humidity.

[0056] (3) Completed: After ripening is complete, close all functional units, open the door of container 2, remove the roller shutter hook, and remove the wind deflector mechanism 12. Then, use a forklift to directly load the processed fruit baskets onto a truck for transportation.

[0057] The device of this invention is not limited to kiwifruit, but can also be used for other post-ripening fruits such as bananas and mangoes. Depending on the type of fruit or vegetable, the pre-cooling temperature, ripening temperature curve, and the concentration and timing of ethylene supplementation can be adjusted. These parameters can be automatically controlled by the control box according to a preset program, or manually set by the operator. Furthermore, the adjustment of the guide vanes and the opening degree of the grid zones can be adapted on-site according to the actual stacking conditions.

[0058] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A mobile containerized pressure differential precooling and ripening integrated device, characterized in that, include: The container (2) is provided with a central air supply channel and return air channels on both sides of the central air supply channel. The area between the central air supply channel and the return air channels on both sides is a fruit and vegetable storage area. The top of the intermediate air supply channel is equipped with a ceiling-mounted air cooler (16), and the interior of the intermediate air supply channel is equipped with a flow guiding and wind-blocking mechanism (12). The top of the return air duct is equipped with a differential pressure fan (17), and the inside of the return air duct is equipped with a perforated grid plate device (9) adjacent to the fruit and vegetable placement area. A refrigeration system for providing cooling or heating to the interior of the container; A reversing valve, which is connected to the refrigeration system, is used to switch the refrigerant flow direction so that the container can switch between refrigeration mode and heating mode. A windproof structure is installed inside the container to prevent airflow short-circuiting.

2. The mobile containerized pressure differential precooling and ripening integrated device according to claim 1, characterized in that, The airflow guiding and wind-blocking mechanism (12) includes a movable base, and a partition plate (1201) perpendicular to the movable base is provided in the middle of the movable base. The two sides of the partition plate (1201) are respectively opposite to the two return air channels. It also includes a vertical sliding guide rail (1202) and multiple guide plate groups that are vertically spaced along the vertical sliding guide rail (1202). Each guide plate group includes two guide plates (1206), and the two guide plates (1206) of each guide plate group are symmetrically arranged on both sides of the partition plate (1201). The distance between the two guide vanes (1206) and the partition plate (1201) in each guide vane group decreases from top to bottom; Each guide plate assembly has two guide plates (1206) that are tunably connected to a vertical sliding guide rail (1202) via a transverse slide rail (1205). Each guide plate is tunably connected to the transverse slide rail (1205).

3. The mobile containerized pressure differential precooling and ripening integrated device according to claim 2, characterized in that, The airflow guiding and windproof mechanism (12) also includes a horizontal windproof plate (1207), a side windproof plate (1208), and a sealing strip (1209). The horizontal windbreak (1207) is fixed on the movable base; The side baffle (1208) is fixed to the side of the movable base; Sealing strips (1209) are installed at the joint between the horizontal wind deflector (1207) and the side wind deflector (1208).

4. The mobile containerized differential pressure precooling and ripening integrated device according to claim 2, characterized in that, The bottom of the movable base is also equipped with casters (1210).

5. A mobile containerized pressure differential precooling and ripening integrated device according to claim 1, characterized in that, The container (2) is an insulated container, and the fruit and vegetable placement area is equipped with a tray (10) for stacking perforated fruit and vegetable baskets.

6. A mobile containerized pressure differential precooling and ripening integrated device according to claim 5, characterized in that, Both return air ducts are equipped with windproof roller shutters (13) above them; The windproof roller shutter (13) includes an electric roller (1301) and a windproof cloth (1302). One end of the windproof cloth (1302) is fixedly connected to the electric roller (1301) and wound on the electric roller (1301); The other end of the windproof cloth (1302) is provided with a hook (1303), which is used to hang on the side of the top fruit and vegetable basket near the middle air supply channel.

7. A mobile containerized pressure differential precooling and ripening integrated device according to claim 1, characterized in that, The perforated grid plate device (9) includes a perforated rectifier plate (906) and multiple layers of louvers (901) located on one side of the perforated rectifier plate (906) and arranged longitudinally along the perforated rectifier plate (906). Each louver (901) has a gear (903) fixedly connected to its end, and both ends of each louver (901) are rotatably connected to a frame connected to the perforated rectifier plate (906).

8. A mobile containerized pressure differential precooling and ripening integrated device according to claim 7, characterized in that, The multi-layer louver (901) is divided into multiple independent adjustment zones. Each independent adjustment zone is equipped with an independent adjustment mechanism. The gears (903) connected to the ends of each louver (901) in the same independent adjustment zone mesh with each other and are connected to the corresponding adjustment mechanism for transmission.

9. A mobile containerized pressure differential precooling and ripening integrated device according to claim 1, characterized in that, The refrigeration system is an air-cooled refrigeration unit (3), including a compressor, a condenser (4) and an evaporator (1601). The ceiling-mounted air cooler (16) includes a housing and an external rotor fan (1602). The external rotor fan (1602) is fixed in the fan mounting hole at the bottom of the outer casing. The fan mounting hole is directly opposite the middle air supply channel. There are two evaporators (1601), which are fixed in the air inlets of the cold air fans on both sides of the outer casing. The air inlets of the two cold air fans are respectively opposite to the air outlets of the two return air channels. The reversing valve has four ports, wherein the first port is connected to the exhaust port of the compressor, the second port is connected to the condenser (4), the third port is connected to the evaporator (1601), and the fourth port is connected to the suction port of the compressor. The reversing valve has a first working state and a second working state. In the first working state, the reversing valve connects the compressor's exhaust port to the condenser (4) and the evaporator (1601) to the compressor's suction port to achieve a cooling mode. In the second working state, the reversing valve connects the compressor's exhaust port to the evaporator (1601) and the condenser (4) to the compressor's suction port to achieve a heating mode. It also includes an equipment end (1), which is located outside the container (2), and the compressor, condenser (4) and ethylene generator (5) are all installed inside the equipment end (1); The device end (1) is also equipped with an ozone generator (6), a humidifier (7) and a control box (8); The control box (8) is equipped with a controller, and the container (2) is also equipped with an ethylene concentration sensor and a temperature and humidity sensor; The compressor, reversing valve, ethylene generator (5), ozone generator (6), humidifier (7), differential pressure fan (17), external rotor fan (1602), ethylene concentration sensor and temperature and humidity sensor are all electrically connected to the controller. The output end of the ethylene generator (5) is connected to the ethylene pipeline (14); The output terminals of the ozone generator (6) and the humidifier (7) are both connected to the humidification and ozone pipeline (15); The ethylene pipe (14) and the humidification and ozone pipe (15) are both connected to the interior of the container (2).

10. A mobile containerized pressure differential precooling and ripening integrated device according to claim 1, characterized in that, The wind-blocking structure also includes a tapered wind deflector (18) and a front wind deflector (11); the tapered wind deflector (18) is located between the air outlet of the ceiling-mounted air cooler (16) and the inlet of the intermediate air supply channel, and the cross-sectional area of ​​its airflow channel gradually decreases along the airflow direction; the front wind deflector (11) consists of two pieces, which are respectively located inside the container (2) on the side near the door and in front of the fruit and vegetable placement areas on both sides of the intermediate air supply channel.

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