Fresh-keeping device for agricultural product transportation

Abstract

The utility model discloses a fresh-keeping device for agricultural product transportation, and relates to the technical field of agricultural product transportation, the fresh-keeping device comprises a box body, a sealing cover, a phase change material layer, a humidity adjusting system, a buffer structure and an intelligent monitoring module, the box body is of a double-layer heat insulation structure, the outer layer is an EPS heat insulation layer, the inner layer is a PE layer, and the middle is filled with phase change materials; the humidity adjusting system comprises a water absorption pad located at the bottom of the box body and a breathable film located at the top of the sealing cover, the buffering structure is a supporting frame, and the surface of the buffering structure is covered with a nano-silver antibacterial coating. Through the cooperation of the double-layer heat insulation structure (EPS + PE) and the phase change material (the phase change temperature of 0-10 DEG C), the temperature in the box is kept stable in a passive mode, the respiration and microbial activity of agricultural products are inhibited, and compared with traditional normal-temperature packaging, the fresh-keeping period is prolonged by 30%-50% (for example, the fresh-keeping period of strawberries is prolonged from 3 days to 7 days). The water absorption pad (sodium polyacrylate) absorbs condensate water, redundant water vapor is discharged in combination with the BOPP anti-fog breathable film (the micropores are 0.1-1 micron), and the humidity is accurately controlled to be 85%-95%.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural product transportation technical field, concretely relates to a fresh -keeping device for agricultural product transportation. BACKGROUND

[0002] The core problem of quality deterioration of agricultural products in the transportation process mainly includes:

[0003] Insufficient temperature and humidity control:

[0004] Traditional normal temperature packaging (such as paper box, ordinary plastic box) lacks effective heat insulation and humidity adjusting means, and the temperature in the box fluctuates sharply with the environment (temperature difference can reach more than 10 DEG C), resulting in the enhancement of the respiration of agricultural products and the accelerated water loss.For example, the daily weight loss rate of leafy vegetables in normal temperature transportation can reach 5% to 8%, and wilting appears in 2-3 days;strawberry and other berries are prone to mold breeding due to temperature fluctuation, and the shelf life is usually not more than 3 days.

[0005] Part of the technology adopts ice bag cooling or mechanical refrigeration (such as cold chain vehicle), but the ice bag is easy to cause water accumulation in the box after melting, and the cost of cold chain equipment is high (energy consumption accounts for 30% to 40% of transportation cost), which is difficult to popularize to small and medium scale transportation scene;although controlled atmosphere storage (CA) can adjust the gas composition, the device is complex, and the maintenance cost is high, which is not suitable for short distance or multi-class mixed transportation.

[0006] Mechanical damage and microbial contamination:

[0007] The traditional packaging cushion structure is simple (such as foam pad), and the compression strength is insufficient (usually <100N / m²), and the transportation vibration and stacking pressure are easy to cause the extrusion and damage of agricultural products, especially the fragile fruits such as peaches and pears, and the damage rate can reach 15% to 20%.

[0008] Bacteria (such as escherichia coli and mold) are easy to breed on the surface of the packaging material, and the existing technology lacks long-term antibacterial means, and the reproduction of microorganisms accelerates the corruption of agricultural products, especially in high humidity environment, the corruption risk increases significantly. UTILITY MODEL CONTENT

[0009] The utility model aims at providing a fresh-keeping device for agricultural product transportation to solve the problems in the above background technology.

[0010] To solve the above technical problems, the utility model adopts the technical scheme:

[0011] A fresh-keeping device for agricultural product transportation, including box, cover, phase change material layer, humidity adjusting system, buffer structure and intelligent monitoring module, the box is double-layer heat insulation structure, the outer layer is EPS heat insulation layer, the inner layer is PE layer, and the middle is filled with phase change material;

[0012] The humidity adjusting system comprises a water absorption pad at the bottom of the box body and a breathable film at the top of the cover;

[0013] The buffer structure is a support frame, and the surface is covered with a nano-silver antibacterial coating.

[0014] The intelligent monitoring module comprises a temperature and humidity sensor, a Bluetooth module and an LED indicator.

[0015] The further improvement of the technical scheme of the utility model lies in that the phase change material is paraffin or straight-chain alkane, and the phase change temperature is 0-10 DEG C.

[0016] The further improvement of the technical scheme of the utility model lies in that the water absorption pad is a polyacrylic acid sodium water absorption resin, and the breathable film is a BOPP anti-fog breathable film.

[0017] The further improvement of the technical scheme of the utility model lies in that the support frame is composed of transverse support plates and longitudinal support plates which are connected end to end, the transverse support plates and the longitudinal support plates are all PP honeycomb plates, a slot is formed in the center of one side of the transverse support plate, an elastic partition plate is inserted into the inner wall of the slot, and the elastic partition plate is made of elastic PE material.

[0018] The further improvement of the technical scheme of the utility model lies in that the longitudinal support plate is provided with a butt joint groove at each end, and the transverse support plate is inserted into the inner wall of the butt joint groove at one end.

[0019] The further improvement of the technical scheme of the utility model lies in that the bottom surface and the upper surface of the cover are both provided with breathable holes.

[0020] The further improvement of the technical scheme of the utility model lies in that the temperature and humidity sensor is fixedly connected to the inner wall of the box body, and the Bluetooth module and the LED indicator are arranged on the inner wall top of the cover.

[0021] Thanks to the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0022] The utility model provides a kind of fresh-keeping device for agricultural product transportation, is cooperated with phase change material (0-10 ℃ phase change temperature) by double-layer heat insulation structure (EPS+PE), no source maintains temperature stability in box, inhibits agricultural product respiration and microbial activity, compared with traditional normal temperature package, prolongs fresh-keeping period 30%~50% (such as strawberry fresh-keeping period is extended from 3 days to 7 days). Water absorption pad (polyacrylic acid sodium) absorbs condensed water, combined with BOPP anti-fog breathable film (micropore 0.1-1 μm) to discharge excess water vapor, accurately control humidity at 85%~95%, avoid water accumulation to cause rot or excessive evaporation water loss, leafy vegetable fresh-keeping period can be extended from 2 days to 5 days.

[0023] The utility model provides a kind of fresh-keeping device for agricultural product transportation, the nano-silver antibacterial coating (antibacterial rate is greater than or equal to 90%) on the surface of supporting frame and elastic partition plate effectively inhibits the breeding of microorganisms such as escherichia coli and mould, and reduces the risk of corruption.Supporting frame + elastic PE partition plate forms "rigid-flexible combination" buffer structure, the compression strength is increased by 50% (reaches 150kPa), can withstand 50N lateral pressure without deformation, significantly reduce the mechanical damage caused by extrusion and collision in transportation.

[0024] The utility model provides a kind of fresh-keeping device for agricultural product transportation, elastic partition plate (quickly disassembled by insertion slot) and spliced supporting frame (triangular lug + butt joint groove), can be flexibly adjusted internal space according to agricultural product size, adapt to fruits and vegetables, meat and other various categories;Water absorption pad, phase change material and other components can be independently replaced, single maintenance time is less than or equal to 2 minutes, and the repeated utilization rate reaches more than 90%. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure schematic diagram of the utility model;

[0026] Figure 2 It is the overhead structure schematic diagram of the utility model's box;

[0027] Figure 3 It is the supporting frame structure schematic diagram of the utility model;

[0028] Figure 4 It is the cover detail structure schematic diagram of the utility model.

[0029] In the drawing: 1, box;2, cover;3, EPS heat insulation layer;4, PE layer;5, phase change material;6, water absorption pad;7, air-permeable membrane;8, supporting frame;9, temperature and humidity sensor;10, Bluetooth module;11, LED indicator light;12, transverse support plate;13, longitudinal support plate;14, butt joint groove;15, insertion slot;16, elastic partition plate;17, air hole. DETAILED DESCRIPTION

[0030] In the description of the utility model, it also needs to be explained that, unless there is explicit provision and limitation, the terms "arrange", "install", "connect", "connect" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0031] The utility model will be further described in combination with examples:

[0032] Embodiment 1

[0033] As Figures 1-4 shown, the utility model provides a fresh -keeping device for agricultural product transportation, including box 1, cover 2, phase change material layer, humidity adjusting system, buffer structure and intelligent monitoring module, box 1 is double -layer heat -insulating structure, and the outer layer is EPS heat -insulating layer 3, and the inner layer is PE layer 4, and the middle is filled with phase change material 5;

[0034] Humidity adjusting system includes water absorption pad 6 at the bottom of box 1 and air -permeable membrane 7 at the top of cover 2;

[0035] Buffer structure is support frame 8, and the surface is covered with nano silver antibacterial coating;

[0036] Intelligent monitoring module includes temperature and humidity sensor 9, bluetooth module 10 and LED pilot lamp 11.

[0037] PE layer 4 is polyethylene layer, and EPS heat -insulating layer 3 is polystyrene foam layer.

[0038] Phase change material 5 is paraffin or straight chain alkane, and the phase change temperature is 0-10 DEG C. Phase change material 5 adopts the block structure (size 5cmx5cmx2cm) of mould pressing, and is filled between EPS heat -insulating layer 3 and PE layer 4 at interval 1cm, is fixed through hot melt glue point (interval 5cm), prevents the displacement of transportation.

[0039] Water absorption pad 6 is polyacrylic acid sodium water absorption resin, and air -permeable membrane 7 is BOPP anti -fog air -permeable membrane. Water absorption pad 6 thickness 3mm, and the edge is turned up 1cm and forms a flow guide groove, covers 90% area of the bottom of box 1, and water absorption ratio is greater than or equal to 50 times (deionized water), and the weight after saturated water absorption is less than or equal to 20% of the self -weight of the box. The bottom of water absorption pad is provided with grid -shaped flow guide hole (pore diameter 1mm), cooperates with the drain hole (diameter 3mm, position close to corner) of the bottom of the box, and is convenient for drainage when replacing after sale.

[0040] The micropore diameter of BOPP anti -fog air -permeable membrane 7 is 0.1-1μm, the air permeability is 500-1000g / (m²·24h), the anti -fog coating thickness is 5-10μm, and the condensed water is formed on the film surface even water film instead of water droplets.

[0041] The edge of cover 2 is provided with annular silica gel sealing ring (width 1.5cm, compression ratio 20%), cooperates with the convex edge (height 2mm) of the top of box 1, realizes IP54 level dustproof and waterproof.

[0042] Embodiment 2

[0043] As Figures 1-4As shown, on the basis of embodiment 1, the utility model provides a technical scheme: preferably, the support frame 8 is composed of the transverse support plate 12 and the longitudinal support plate 13 in head-to-tail connection, the transverse support plate 12 and the longitudinal support plate 13 all adopt PP honeycomb plate, the transverse support plate 12 is provided with the slot 15 at the center of one side, the inner wall of the slot 15 is inserted with the elastic partition plate 16, and the elastic partition plate 16 is made of elastic PE material.

[0044] The both ends of the longitudinal support plate 13 are provided with the butt joint groove 14, and one end of the transverse support plate 12 is inserted with the inner wall of the butt joint groove 14.

[0045] The bottom surface and the upper surface of the cover 2 are provided with the air permeation hole 17. The air permeation hole 17 is distributed in a matrix (diameter 2mm, interval 10mm), is attached with the air permeation film 7 at 5mm below, is fixed by ultrasonic welding, and the gas exchange area is ensured to be greater than or equal to 100cm².

[0046] The temperature and humidity sensor 9 is fixedly connected to the inner wall of the box body 1, and the Bluetooth module 10 and the LED indicator 11 are arranged on the inner wall top of the cover 2.

[0047] The working principle of the fresh-keeping device for agricultural products will be described below.

[0048] As shown in the figure, Figures 1-4 Temperature control: when the agricultural products are placed in the box body 1 for transportation, the phase change material 5 can absorb or release heat, and the EPS heat insulation layer 3 is combined to stabilize the temperature in the box to 0-10℃, and inhibit the respiration of the agricultural products.

[0049] Humidity regulation: the water absorption pad 6 can absorb condensed water, and the air permeation film 7 in the cover 2 can discharge excess water vapor to maintain humidity balance.

[0050] Anti-pressing protection: the support frame 8 and the elastic partition plate 16 disperse pressure, and the nano-silver coating inhibits bacteria.

[0051] Intelligent monitoring: the temperature and humidity sensor 9 collects data in real time, and the APP is used for remote monitoring and alarm in case of abnormality.

[0052] The elastic partition plate 16 is inserted into the support frame 8 through the slot 15, and can be quickly disassembled by lifting and pulling away. The one end of the transverse support plate 12 is similar to the triangular protruding block structure and is butted with the butt joint groove 14, so that the fixing work of the transverse support plate 12 and the longitudinal support plate 13 can be quickly completed, and the two can only be separated by lifting.

[0053] The utility model has made the detailed description to the utility model generally above, but can make some modification or improvement to it on the basis of the utility model, this is obvious to the general skilled person in the technical field. Therefore, the modification or improvement without departing from the utility model thought spirit, all are within the protection scope of the utility model.

Claims

1. A fresh-keeping device for agricultural product transportation, comprising a box body (1), a cover (2), a phase change material layer, a humidity adjusting system, a buffer structure and an intelligent monitoring module, characterized in that: The box (1) is a double-layer heat insulation structure, the outer layer is an EPS heat insulation layer (3), the inner layer is a PE layer (4), and the middle is filled with a phase change material (5); The humidity adjusting system comprises a water absorbing pad (6) at the bottom of the box (1) and a breathable film (7) at the top of the cover (2); The buffer structure is a support frame (8) covered with a nano-silver antibacterial coating on the surface; The intelligent monitoring module comprises a temperature and humidity sensor (9), a Bluetooth module (10) and an LED indicator light (11).

2. The fresh-keeping device for agricultural product transportation according to claim 1, characterized in that: The phase change material (5) is paraffin or straight-chain alkane, and the phase change temperature is 0-10℃.

3. The fresh-keeping device for agricultural product transportation according to claim 1, characterized in that: The water absorbing pad (6) is a polyacrylic acid sodium water absorbing resin, and the breathable film (7) is a BOPP anti-fog breathable film.

4. The fresh-keeping device for agricultural product transportation according to claim 1, characterized in that: The support frame (8) is composed of transverse support plates (12) and longitudinal support plates (13) connected end to end, the transverse support plates (12) and the longitudinal support plates (13) are both PP honeycomb plates, a slot (15) is formed in the center of one side of the transverse support plate (12), an elastic partition plate (16) is inserted into the inner wall of the slot (15), and the elastic partition plate (16) is made of elastic PE material.

5. The fresh-keeping device for agricultural product transportation according to claim 4, characterized in that: Both ends of the longitudinal support plate (13) are provided with butt joint grooves (14), and one end of the transverse support plate (12) is inserted into the inner wall of the butt joint groove (14).

6. The fresh-keeping device for agricultural product transportation according to claim 1, characterized in that: The bottom surface and the upper surface of the cover (2) are both provided with breathable holes (17).

7. The fresh-keeping device for agricultural product transportation according to claim 1, characterized in that: The temperature and humidity sensor (9) is fixedly connected to the inner wall of the box (1), and the Bluetooth module (10) and the LED indicator light (11) are arranged on the top of the inner wall of the cover (2).

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