Cold transportation device facilitating unloading

Abstract

The invention relates to the technical field of transfer carts, in particular to a cold transportation device convenient for unloading, which comprises a transport cart, a refrigerated container is arranged on the transport cart, a refrigeration compressor is arranged at the top of the refrigerated container, at least three refrigeration cavities are arranged in the refrigerated container, and a shelf mechanism is arranged in each refrigeration cavity. The goods shelf mechanism comprises an inlet, an outlet and conveying mechanisms, and the conveying mechanisms are arranged in the refrigeration cavities in a staggered array mode; the baffles are arranged between the two connected layers of transmission belts; and an opening / closing mechanism is arranged at the inlet and the outlet to control opening / closing and sealing of the inlet and the outlet. A plurality of small output ports are arranged to replace a traditional mode of opening and closing a whole container door, and a sealing air bag and sealing plate sealing structure is combined, so that the loss of cold air is effectively controlled, the refrigeration energy consumption is greatly reduced, and the heat preservation stability in the cold chain transportation process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transport vehicles, and particularly to a cold transport device convenient for unloading. Background Art

[0002] Cold chain transport vehicles are mainly used for short-distance or medium-long-distance transportation of items with strict requirements for transportation temperature, such as fresh food, vaccines, drugs, frozen materials, etc. Cold chain transport vehicles use refrigeration mechanisms for refrigeration and have characteristics such as temperature controllability, long-lasting cold preservation, and reasonable structure.

[0003] For example, the utility model patent with the publication number CN206254874U discloses a cold chain logistics express delivery device, including a vehicle frame and a cab, a refrigerated insulation box body, a refrigeration unit, and a charging device provided on the vehicle frame. The compressor contained in the refrigeration unit is arranged on the upper part of the refrigerated insulation box body, and the used compressor is a semi-closed or fully enclosed refrigeration compressor; at the same time, a deflector is provided between the upper part and the rear part of the cab and the refrigerated compartment. The upper sides of the two sides of the deflector are in a contracted structure from back to front, the top of the deflector is an arc-shaped surface structure extending from the back upper direction to the front lower direction, and an LED display screen is embedded in the front side of the upper part of the deflector.

[0004] The invention patent application with the publication number CN113335171A discloses an electrokinetic field type refrigerated fresh-keeping box based on a cold chain distribution vehicle, including a vehicle head, a vehicle bottom plate connected to the vehicle head, a refrigerated fresh-keeping box arranged on the vehicle bottom plate and behind the vehicle head, and a refrigeration device arranged outside the refrigerated fresh-keeping box. The refrigerated fresh-keeping box is composed of a refrigerated fresh-keeping box main body, a warehouse door arranged at the tail of the refrigerated fresh-keeping box main body, an air outlet structure arranged inside the refrigerated fresh-keeping box main body, and an electric field generating structure arranged inside the refrigerated fresh-keeping box main body. It generates cold air by arranging an electric field generating structure in the cold chain vehicle, and at the same time arranges an air outlet structure to blow the cold air to various positions in the fresh-keeping box, so as to extend the fresh-keeping time of the refrigerated fresh-keeping box and thus achieve a longer transportation distance.

[0005] Another example is that the utility model patent with the publication number CN209738916U discloses a multi-temperature zone intelligent cold chain distribution vehicle, including a vehicle body, a box body, an embedded automatic ladder, a folding movable door, a first ventilation system, and a second ventilation system. By arranging a folding movable door on the box body, and a circulating cold air atmosphere formed by the cooperation of a refrigeration module, a cold air zone, a first ventilation system, and a second ventilation system, the refrigerated carriage is divided into two refrigerated storage spaces with variable volumes, and the temperatures of the two refrigerated storage spaces can be controlled by a numerical control fan at the same time; by arranging an embedded automatic ladder under the side door or the rear door, it is more convenient and safe to get on and off the box body.

[0006] However, in actual use, existing cold chain transport vehicles generally have a significant problem, that is, the rear door of the vehicle must be fully opened when loading and unloading goods. Since cold chain transportation has high requirements for temperature control, the interior of the vehicle is usually kept at a low temperature to ensure the quality of the goods. When the door is fully opened, the cold air accumulated in the vehicle quickly flows out, and a large amount of hot air from the outside rushes in, causing the temperature inside the vehicle to rise instantly, breaking the originally stable cold chain environment. This loss of cold air not only affects the storage safety of the goods, but also forces the refrigeration system to operate at high intensity again to restore the set temperature, resulting in a large amount of energy waste, reducing the energy efficiency of the cold chain transport vehicle, and affecting the life of the refrigeration equipment. From a thermodynamic point of view, cold air has a high density and is easily deposited at the bottom due to gravity. The moment the door is opened, cold air overflows from the bottom and hot air enters from the top, forming cold and hot convection, further intensifying the heat exchange process, and making the temperature fluctuation in the vehicle more violent. Therefore, this problem is particularly serious in scenarios with frequent loading and unloading operations, which directly restricts the stability and economy of the cold chain transportation process. On the other hand, since the train compartment is completely empty, workers need to perform a series of operations such as counting and stacking the cargo inside. For small amounts of cargo, this is fine in the refrigerated compartment. However, for larger loads, workers need to wear warm uniforms and work in the refrigerated compartment for extended periods of time. However, even in warm uniforms, the experience is very poor for workers.

[0007] In view of this, we propose a new cold transport device that is convenient for unloading. Summary of the Invention

[0008] The purpose of the present invention is to provide a cold transport device that is convenient for unloading, which partially solves or alleviates at least one of the above-mentioned technical problems. When loading and unloading goods, there is no need to open the door at the rear of the refrigerated cargo box, thereby avoiding temperature fluctuations and energy waste caused by opening the door for a long time or frequently. At the same time, there is no need for staff to load or unload goods in the refrigerated box for a long time, and when unloading, it is only necessary to take out the goods in order from the output port, which is very convenient.

[0009] To achieve the above object, the present invention provides the following technical solutions: A refrigerated transport device for convenient unloading includes a transport vehicle, a refrigerated cargo box provided on the transport vehicle, a refrigeration compressor provided on the top of the refrigerated cargo box, a cargo box door provided at the rear of the refrigerated cargo box, at least three independent refrigerated chambers provided in the refrigerated cargo box, each of the refrigerated chambers provided with a shelf mechanism, the shelf mechanism comprising: A conveying mechanism arranged in a staggered array along the height direction of the refrigerating chamber in the refrigerating chamber, an inlet arranged at the top of each refrigerating chamber near the vehicle head, and an outlet arranged on the cargo box door corresponding to the refrigerating chamber; wherein, opening and closing mechanisms are arranged on both the inlet and the outlet, and the opening and closing mechanisms are used to close or open the inlet and the outlet; the shelf mechanism further includes a plurality of baffles rotatably arranged on the inner wall of each refrigerating chamber, each baffle corresponding to the output end of the conveying mechanism, and an elastic resetting member is arranged on the rotating shaft of the baffle; Wherein, the opening and closing mechanism includes: a telescopic driving device arranged in the top wall of the refrigerating chamber / inside the cargo box door, the output end of the telescopic driving device is connected with a sealing plate, sealing air bags are fixedly connected to both sides of the sealing plate, a sealing cavity is arranged inside the sealing plate, a piston plate is piston-connected in the sealing cavity, and a gas passage communicating the sealing air bags and the sealing cavity is arranged inside the sealing plate; When the driving device is in a contracted state, the sealing plate is far away from the inlet / the outlet, and the sealing air bags on both sides of it are squeezed to discharge gas, so that the gas in the sealing air bags enters the sealing cavity through the gas passage, and pushes a part of the piston plate to extend out of the sealing cavity. At this time, the inlet / the outlet is in an open state; When the driving device extends to drive the sealing plate to move towards the inlet / the outlet, and when the telescopic plate protruding from the front end of the sealing plate is compressed by the inner wall at the inlet / the outlet, the gas in the sealing cavity enters the sealing air bags on both sides through the gas passage, so that the sealing air bags gradually expand at the inlet / the outlet, and when the sealing plate completely seals the inlet / the outlet, the expanded sealing air bags seal the inlet (51) / the outlet.

[0010] In some embodiments, the piston plate is connected to the inner wall of the sealing cavity through an elastic member.

[0011] In some embodiments, the gas passage includes: a main passage extending along the movement direction of the piston plate and communicating with the sealing cavity, and shunt passages located on both sides of the main passage and communicating with the main passage.

[0012] In some embodiments, the elastic member is arranged in the main passage, and one end of it is fixedly connected to the bottom of the main passage, and the other end is fixedly connected to the piston plate to limit / reset it.

[0013] In some embodiments, the elastic member is a spring.

[0014] In some embodiments, a pull-out placement groove is provided at the bottom of the refrigerated cargo box, and the placement groove is used to place a foldable refrigerated packaging box.

[0015] In some embodiments, a sealed chamber is provided on the inner wall of the refrigerated packaging box, and a cold storage material is stored in the sealed chamber.

[0016] In some embodiments, oblique stripes are provided on the outer wall of the baffle, and the oblique stripes are used to guide the sliding direction of the goods.

[0017] In some embodiments, the elastic reset member is a volute spring.

[0018] In some embodiments, the driving device is a telescopic motor or a hydraulic cylinder or a pneumatic cylinder.

[0019] By means of the above technical solutions, the present invention provides a cold transportation device convenient for unloading. It has at least the following beneficial effects: 1. By setting a plurality of small output ports to replace the traditional opening and closing method of the entire cargo box door, combined with the sealing structure of the sealing airbag and the sealing plate, the present invention effectively controls the loss of cold air, greatly reduces the refrigeration energy consumption, and improves the heat preservation stability during the cold chain transportation process.

[0020] 2. The present invention uses a multi-layer electric conveyor belt (i.e., a shelf mechanism) arranged in a staggered manner in cooperation with a buffer baffle with a reset function, so that the goods are guided and buffered during the multi-level vertical falling process, preventing the goods from tilting, colliding or being damaged, and at the same time improving the efficiency of goods entering and leaving the warehouse.

[0021] 3. For some transportation scenarios, the unloading points during the cold chain distribution vehicle transportation process have a fixed order. Therefore, only need to put each cargo into the corresponding refrigerated cavity in sequence according to the order of the goods to be unloaded at each unloading point, and then only need to control the conveying mechanism in the corresponding refrigerated cavity to send the goods out through the output port, so there is no need to open the card door, nor does the staff need to enter the carriage to carry the goods, which not only prevents the cold air from leaking, but also avoids a large amount of cold air leaking due to frequent opening of the large door, and avoids the adverse effects on the body caused by the staff frequently entering the refrigerated box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale. Obviously, the following described drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0023] Figure 1 Schematic structural diagram of an embodiment of a cold transport device for convenient unloading according to the present invention; Figure 2 Schematic cross-sectional structure diagram of a refrigerated cargo box in an embodiment of a cold transport device for convenient unloading according to the present invention; Figure 3 Schematic cross-sectional structure diagram of a sealing plate in an embodiment of a cold transport device for convenient unloading according to the present invention; Figure 4 Schematic structural diagram of a baffle in an embodiment of a cold transport device for convenient unloading according to the present invention; Figure 5 Schematic structural diagram of another embodiment of a cold transport device for convenient unloading according to the present invention; Figure 6 is Figure 5 Distribution schematic diagram between the diversion conveying mechanism corresponding to the inlet and the top conveying mechanism in each shelf mechanism in the refrigerated cargo box in the shown cold transport device; Figure 7 is Figure 5 Schematic diagram of diversion by turning of a turning mechanism in the shown cold transport device; Figure 8 is Figure 5 Distribution schematic diagram between the diversion conveying mechanism corresponding to the outlet and the bottom conveying mechanism in each shelf mechanism in the refrigerated cargo box in the shown cold transport device; Figure 9 is Figure 5 Schematic diagram of multiple turning mechanisms on the diversion conveying mechanism corresponding to the inlet in the shown cold transport device turning to output goods; Figure 10 Schematic structural diagram of a temporary storage conveying mechanism arranged in a refrigerated cargo box in another embodiment of a cold transport device for convenient unloading according to the present invention; Figure 11 is Figure 5 Schematic diagram of staggered arrangement of each layer conveying mechanisms in the shelf mechanism in the shown cold transport device.

[0024] In the figure: 1, transport vehicle; 2, refrigerated cargo box; 3, compressor; 4, placement groove; 5, shelf mechanism; 51, inlet; 52, cargo box door; 53, outlet; 54, conveying mechanism; 55, baffle; 56, elastic reset member; 57, diagonal stripes; 6, opening and closing mechanism; 61, telescopic driving device; 62, sealing plate; 63, sealing airbag; 64, sealing cavity; 65, return spring; 66, piston plate; 67, gas passage; 70, diversion conveying mechanism; 71, turning mechanism; 72, limit baffle; 73, temporary storage conveying mechanism. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In this article, suffixes such as "module", "component" or "unit" used to represent elements are only for the convenience of describing the present invention and have no specific meaning in themselves. Therefore, "module", "component" or "unit" can be used interchangeably.

[0027] In this article, terms such as "upper", "lower", "inner", "outer", "front", "rear", "one end", "the other end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In this article, unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In this article, "and / or" includes any and all combinations of one or more of the listed related items.

[0030] In this article, "a plurality of" means two or more, that is, it includes two, three, four, five, etc.

[0031] Embodiment 1: Please refer to Figure 1 - Figure 4 As shown in the figure, a technical solution provided by the present invention: a cold transportation device convenient for unloading, including a transport vehicle 1, a refrigerated cargo box 2 is arranged on the transport vehicle 1, a refrigeration compressor 3 is arranged on the top of the refrigerated cargo box 2 for refrigeration; a cargo box door 52 is arranged on the refrigerated cargo box 2.

[0032] In this embodiment, at least three independent refrigeration chambers are arranged in the refrigerated cargo box 2, and a shelf mechanism 5 is arranged in each refrigeration chamber. Specifically, the shelf mechanism 5 includes: The conveying mechanism 54 arranged in a staggered array along the height direction of the refrigerating chamber is used for transporting goods; preferably, one end of the conveying mechanism 54 is close to the inner wall of the refrigerating chamber, and there is a certain distance between the other end and the inner wall of the refrigerating chamber, and this distance enables the goods on the conveying mechanism 54 to automatically fall onto the next layer of the conveying mechanism 54 arranged in a staggered manner; The inlet 51 is arranged at the position near the head of each refrigerating chamber at the top. The inlet 51 is used for placing goods into it. For example, multiple goods are input through the inlet 51 by a manipulator or manually according to a preset incoming order; The outlet 53 is arranged on the cargo box door 52. The outlet 53 is used for outputting goods. The outlet 53 is relatively small with respect to the entire cargo box door 52. Preferably, it is arranged at the bottom of the cargo box door 52; when in use, only opening the outlet 53 can output the corresponding goods according to a preset outgoing order, which plays a role in reducing the consumption of cold air and further reduces the energy consumption.

[0033] In some embodiments, the conveying mechanism 54 adopts a conveyor belt driven by a motor. Specifically, when a piece of goods is placed through the inlet 51, the goods directly fall onto the conveyor belt at the topmost layer of the shelf mechanism from the inlet 51. When the second piece of goods is placed, the conveyor belt is controlled to move a certain distance, and so on, until each layer of the conveyor belt is filled with goods in accordance with the established outgoing order. That is, the goods in each refrigerating chamber are shipped in the order of first in, first out. Since three independent refrigerating chambers are provided, and the conveyor belt is only turned on when incoming or outgoing goods each time, although it can generate a certain amount of heat, it is relatively small and will not have too much impact on the freezing environment in the refrigerating chamber.

[0034] In other embodiments, in order to avoid the heat generated by the motor drive from affecting the freezing environment in the refrigerated cargo box, the conveying mechanism adopts a roller conveyor belt that does not require motor drive, and each layer of the conveying mechanism is inclined downward at a certain angle, so that the goods can automatically move on this conveyor belt and go to the next layer of the conveyor belt. Preferably, in order to avoid the goods being damaged by a large impact force or even hitting the inner wall of the cargo box during the movement from the upper layer to the lower layer, the inclination angle of the roller conveyor belt is 5 - 25°. For example, for small goods, the inclination angle is relatively large, preferably 15°, so that the goods have the power to move, while for larger goods, the inclination angle is relatively small, preferably 5°, so as to avoid the goods generating a large impact force at a large inclination angle.

[0035] During specific use, the goods are placed into the refrigerated cargo box through the inlet 51 manually or by a manipulator. The goods first reach the top conveying mechanism 54, then move away from the inlet 51 through the top conveying mechanism 54, and then fall onto the second-layer conveying mechanism 54. In this way, the goods are conveyed layer by layer downwards and finally output through the outlet 53 corresponding to the bottom conveying mechanism 54. Thus, when loading and unloading, it is not necessary to open the large cargo box door 52, which can not only reduce a large amount of cold air leakage but also eliminate the need for workers to enter the refrigerated cargo box for manual handling.

[0036] In some other embodiments, the shelf mechanism 5 further includes: a plurality of baffles 55 rotatably arranged on the inner wall of the refrigerated chamber. Specifically, except for the bottom conveying mechanism 54, a baffle 55 is arranged between the gap between each layer of the conveying mechanism 54 and the refrigerated chamber, and an elastic reset member 56, such as a scroll spring, is fixedly connected between the rotating shaft of the baffle 55 and the inner wall of the refrigerated chamber. On the premise of no external force, the baffle 55 remains in an almost horizontal state under the elastic force of the scroll spring. When the goods fall from the conveying mechanism 54 corresponding to the baffle 55 onto the baffle 55, the baffle 55 tilts downward, and then the goods fall onto the next-layer conveying mechanism 54. That is to say, the baffle 55 plays a buffering role to prevent the goods from being damaged. Moreover, the baffle 55 can automatically reset when not affected by external forces, maintaining the stability of each layer of the conveying system and being able to adapt to goods of different sizes and weights.

[0037] Furthermore, at the end (i.e., the output end) of the roller conveyor belt at the bottom layer of each shelf mechanism 5, a liftable (preferably, driven by a motor or a hydraulic cylinder / pneumatic cylinder) limit baffle is provided. Of course, the liftable baffle can also adopt the above-mentioned rotatable and resetable baffle. The difference is that its rotation direction is not downward but upward, that is, when it rotates upward, it limits the end of the roller conveyor belt.

[0038] Preferably, there are three groups of inlets 51 and outlets 53, which are respectively used for corresponding to three different specifications of large, medium, and small goods. An opening and closing mechanism 6 is arranged on each group of inlets 51 and outlets 53, and the opening and closing mechanism 6 is used to close or open the inlets 51 and outlets 53.

[0039] In some embodiments, diagonal stripes 57 are arranged on the upper surface of the baffle 55, and the diagonal stripes 57 are used to guide the sliding direction of the goods, effectively reducing the inclination or deviation of the goods during the sliding process and improving the accuracy of the landing point.

[0040] See Figure 3, in some embodiments, the opening and closing mechanism 6 includes: a telescopic driving device 61 (the driving device 61 corresponding to the inlet 51 is embedded in the top wall of the refrigerating chamber; the driving device corresponding to the outlet 53 is embedded in the cargo compartment door 52). The output end of the telescopic driving device 61 is fixedly connected to a sealing plate 62, and a sealing airbag 63 is fixedly connected to the side of the sealing plate 62; Wherein, a sealing cavity 64 is formed on the inner wall of the sealing plate 62. A return spring (i.e., elastic member 65) is arranged on the inner wall of the sealing cavity 64. One end of the return spring is fixedly connected to the inner wall of the sealing cavity 64, and the other end of the return spring 65 is fixedly connected to a piston plate 66. A gas passage 67 is arranged on the inner wall of the sealing plate 62. The piston plate 66 is piston-connected to the inner wall of the sealing cavity 64, and the gas passage 67 communicates the sealing airbag 63 with the sealing cavity 64.

[0041] When it is necessary to close the inlet 51 or the outlet 53, the driving device 61 starts to extend, thereby driving the sealing plate 62 to extend until the sealing plate 62 closes the inlet 51 or the outlet 53. During the process of the sealing plate 62 gradually closing the inlet or the outlet, the piston plate 66 of the originally protruding part on the sealing plate 62 is gradually compressed, so that the piston plate 66 squeezes the sealing cavity 64. The air in the sealing cavity 64 enters the sealing airbags 63 on both sides through the gas passage, causing the sealing airbags 63 to expand, and sealing the gap between both sides of the sealing plate 62 and the inner wall of the inlet or the outlet, further preventing the leakage of cold air. Preferably, the gas passage includes a main passage communicating with the sealing cavity 64 and shunt passages 67 arranged on both sides thereof, and the shunt passages 67 communicate with the sealing airbags 63. Preferably, the elastic member is arranged in the main passage.

[0042] When it is necessary to open the inlet 51 or the outlet 53, the driving device 61 starts to contract, thereby driving the sealing plate 62 to retract into the top wall of the refrigerating chamber / the cargo compartment door 52. At this time, the expanded sealing airbags 63 on both sides of the sealing plate 62 gradually contract under the extrusion of the inner wall of the installation cavity in the top wall / the cargo compartment door 52, so that the air in the sealing airbags 63 enters the sealing cavity 64 through the gas passage and pushes the piston plate 66 to move in the sealing cavity 64, making the front end part thereof extend out of the sealing cavity 64, but not blocking the inlet 51 / the outlet 53.

[0043] When the cold transportation device facilitating unloading of the present invention is in use, start the cold transportation device facilitating unloading and set it to the refrigeration state. By controlling the operation of the compressor 3, cool down the refrigerated cargo box 2 to ensure that the internal environment of the cargo box meets the preset refrigeration temperature requirements. Select a corresponding set of inlet 51 and outlet 53 according to the size of the goods. The inlet 51 is provided with an opening and closing mechanism 6. Control the driving device 61 in the opening and closing mechanism 6 to open the sealing plate 62 of the inlet 51. Place the goods into the inlet 51 from the outside by means of a manipulator or manually. The goods enter the interior of the refrigerated cargo box 2 through the inlet 51, first fall onto the conveying mechanism 54 at the top, and are horizontally conveyed by the conveying mechanism 54 to one end far from the inlet 51 and then automatically fall, successively falling onto the lower-layer conveying mechanism 54, forming a layered transmission process. During the process of the goods falling from the upper-layer conveying mechanism 54 to the lower-layer conveying mechanism 54, the baffle 55, under the action of the scroll spring, provides buffering for the goods to prevent damage. The surface of the baffle 55 is provided with oblique stripes 57 for guiding the sliding direction to ensure that the goods fall smoothly and remain stable. After the conveying mechanism 54 conveys the goods layer by layer to the lowermost layer, they are output from the outlet 53. The outlet 53 is provided with a relatively small shipping opening. Only by opening the outlet 53 can the goods be taken out, without opening the entire cargo box door 52, thereby reducing the leakage of cold air and improving energy efficiency. When it is necessary to close the inlet 51 or the outlet 53, control the driving device 61 to drive the sealing plate 62 to extend to the fully closed state. The piston plate 66 in the sealing plate 62 is compressed, and after compression, it squeezes the sealing cavity 64, and conducts the air through the gas passage 67 into the sealing airbag 63, causing the sealing airbag 63 to expand and achieving airtight sealing on both sides of the sealing plate 62, further improving the sealing performance of the refrigeration environment.

[0044] In some embodiments, a pull-out placement groove 4 is provided at the bottom of the refrigerated cargo box 2. The placement groove 4 is used to place a foldable packaging box, which is convenient for taking out and sorting. After completing one transportation cycle, the above operation process can be continued to be repeated. Preferably, in order to save energy and extend the freshness preservation time when the refrigeration compressor does not work after a fault or power failure, each side wall of the packaging box is provided with a sealing compartment, and a cold storage material is stored in the sealing compartment. Preferably, the cold storage material uses a cold storage material that remains liquid in a frozen environment (for example, -18° to -20°). More preferably, the packaging box is also provided with a variety of specifications of large, medium, and small for selection. Of course, the packaging box is preferably made of a waterproof material, such as plastic, so that it can be reused to further reduce costs. Of course, the packaging box can also be made of conventional cardboard. The difference is that a groove is provided on the box wall made of cardboard for placing the cold storage material wrapped in a plastic sealed bag, or a cold storage material wrapped in a plastic sealed bag is attached to the inner wall of the packaging box.

[0045] During specific implementation, the goods in each refrigerated chamber are sequentially stored in the corresponding refrigerated chamber from the inlet according to the order in which they are taken out. For example, the goods taken out first are put in first, and the goods taken out later are put in later. Thus, when taking out goods from the storage area each time, it is only necessary to output the goods from the outlet according to the corresponding order, without the need to open the large door for workers to enter the refrigerated container for operations such as picking up and carrying goods.

[0046] The phase change temperature of this cold storage material is between -26°C and -20°C, and it remains liquid even in an environment of -18°C. By injecting this type of cold storage material into the sealed cavity inside the box wall of the packaging box and using it to package items, the temperature inside the packaging box can be controlled at -18°C or even lower for a long time, thereby ensuring the freshness of the items. Compared with dry ice, it can be reused and has a lower cost.

[0047] Embodiment 2: The present invention also provides another cold transportation device, which includes each component in the above Embodiment 1. The difference is that, see Figure 5 , in this embodiment, the refrigerated container 2 is not divided into refrigerated chambers for accommodating items of different specifications and sizes. Correspondingly, an inlet 5 is provided only at the top of the refrigerated container 2, and only an outlet 53 is provided at the bottom of the container door 52; and since there is no division of independent refrigerated chambers, therefore, the multiple shelf mechanisms 5 provided inside the refrigerated container 2 are closely adjacent to each other, and each shelf mechanism 5 also includes a conveying mechanism 54 arranged in a staggered array along the height direction of the refrigerated container 2, see Figure 11 . Among them, the conveying mechanism can adopt the above-mentioned conveyor belt driven by a motor, or can adopt the above-mentioned roller conveyor belt without motor drive, and their working principles are the same, which will not be elaborated here. Preferably, a roller conveyor belt is adopted.

[0048] See Figure 6 and Figure 7 , since there is only one inlet 51 and one outlet 53, in order to let different items enter the refrigerated container 2 in a predetermined order and be shipped out in a predetermined order, a diversion conveying mechanism 70 is provided near the inlet at the top of the refrigerated container 2 in this embodiment. A steering mechanism 71 is provided on the diversion conveying mechanism 70 corresponding to each shelf mechanism 5, and a code scanning device is provided on the steering mechanism 71, which can be used to scan the scannable code on the item to obtain the shelf and route to which the item belongs. Correspondingly, a diversion conveying mechanism 70 is also provided at the outlet 53 of each last-layer conveying mechanism, and a corresponding steering mechanism 71 is also provided on each diversion conveying mechanism 70 corresponding to each shelf mechanism.

[0049] Of course, a liftable limit baffle 72 is provided at the outlet of each bottom-layer conveying mechanism 70, see Figure 8 and Figure 9When the corresponding goods need to be output from the corresponding conveying mechanism, the limit baffle 72 is lowered so that the goods can automatically slide onto the diversion conveying mechanism 70.

[0050] Preferably, the top cross-section of the limiting baffle 72 is in an arc shape, so as to facilitate the sliding of the cargo.

[0051] More preferably, a pressure sensor is provided at the bottom or top of the limit baffle 72, so that when a pressure decrease is detected, the limit baffle 72 is triggered to automatically rise, thereby blocking the next item. Of course, if continuous shipments are required from the shelf mechanism, the main control system of the delivery vehicle directly controls the time when the limit baffle is lowered and raised.

[0052] In a specific implementation, when the goods currently fall into the steering mechanism 71 of the shelf mechanism 5 numbered A on the diverting conveying mechanism 70 through the entrance 4, the code scanning device on the steering mechanism 71 scans the scannable code on the goods to obtain the delivery information of the goods, and when it is recognized that the delivery information includes delivering the goods to the shelf mechanism numbered B, the steering mechanism 71 corresponding to the shelf mechanism numbered A does not turn, and when the goods are delivered to the steering mechanism 71 corresponding to the shelf mechanism numbered B through the diverting conveying mechanism 70, the steering mechanism 71 rotates (preferably, turns under the drive of the drive motor) in a direction so that the goods are delivered to the shelf mechanism 5 numbered B, see Figure 6 and Figure 7 The order in which other items enter the refrigerated cargo box is similar. Preferably, the items are first placed on a shelf mechanism and then placed on the next shelf mechanism.

[0053] Accordingly, when the goods on the bottom conveying mechanism of the shelf mechanism numbered C are conveyed to the diverting conveying mechanism 70 and are located on the corresponding steering mechanism 71, the steering mechanism 71 and the multiple steering mechanisms in front of it are controlled to turn, so that the goods can be directly conveyed to the output port 53 through the diverting conveying mechanism 70, see Figure 8 and Figure 9 .

[0054] Of course, as in Example 1, a baffle 55 is provided at the output end of each layer of the conveying mechanism 54 for buffering, see Figure 11 .

[0055] In actual application, when there is no consignee to receive the goods at a delivery station, or when other situations cause errors, it is necessary to temporarily store the goods currently transported to the output port 53. Therefore, in this embodiment, a temporary storage conveying mechanism 73 is also provided at the output port 53. Figure 10 Preferably, the temporary storage conveying mechanism 73 is an electric conveying mechanism.

[0056] In some embodiments, both the shunt conveying mechanism 70 and the steering mechanism 71 adopt roller conveying mechanisms, and a rotating motor is arranged in the steering mechanism 71, so as to change the conveying direction of the roller conveying mechanism through the rotating motor. Of course, in other embodiments, the shunt conveying mechanism 70 may also adopt a motor-driven conveyor belt.

[0057] Preferably, the limit baffle 72 can be driven to lift by a hydraulic cylinder or a pneumatic cylinder, and can communicate with the main control system through wireless network for data communication.

[0058] The control principle of the main control system is described as follows: When receiving the distribution information sent by the code scanning device corresponding to the steering mechanism 71 corresponding to the inlet 51 during incoming goods, the main control system can obtain the corresponding shelf mechanism number in the database (the distribution information of each good is stored in the database, and the distribution information includes the unique identification code of the good, its corresponding shelf mechanism number, the discharge order on the shelf mechanism, the corresponding distribution station, etc.) according to the unique identification code of the good corresponding to the distribution information; if the current good needs to be distributed to the shelf mechanism with the first number (for example, the shelf mechanism numbered A), the steering mechanism 71 will convey it to the corresponding shelf mechanism; if the current good needs to be distributed to other numbered shelf mechanisms, such as the shelf mechanism numbered B, the good will be conveyed to the steering mechanism corresponding to the shelf mechanism numbered B through the steering mechanism corresponding to the shelf mechanism numbered A and the shunt conveyor belt 70, and then the current good will be conveyed to the shelf mechanism numbered B through this steering mechanism. The principle of conveying goods to other shelf mechanisms is the same and will not be elaborated here.

[0059] During outgoing goods, the main control system controls the limit baffle 72 corresponding to any shelf mechanism that needs to be shipped to rotate or descend, so as to release a good into the corresponding steering mechanism on the shunt conveyor belt 70. If the current shelf mechanism for shipment corresponds to the outlet, the steering mechanism does not need to turn and directly waits for pickup. If the current shelf mechanism for shipment is not applied to the outlet, the main control system controls the steering mechanism to turn, and conveys it to the outlet for shipment through other steering mechanisms between the steering mechanism and the outlet in sequence.

[0060] Whether each steering mechanism 71 turns depends on the conveying direction of the goods. If the current conveying direction of the steering mechanism 71 is the same as the conveying direction of the goods, it does not need to turn. If the current conveying direction of the steering mechanism 71 is different from the conveying direction of the goods, it needs to turn. For example, if the current good is located in the steering mechanism corresponding to the shelf mechanism B, and its conveying direction is to convey to the next steering mechanism, but the conveying direction of the current good is to convey to the shelf mechanism B, then this steering mechanism needs to turn, so that its conveying direction changes from "convey to the next steering mechanism" to "convey to the shelf mechanism B", asFigure 6 and Figure 7 as shown. Also, in the initial state, the conveying directions of all the turning mechanisms at the output end of the conveyor belt are to receive the goods from the shelf mechanism, such as Figure 8 as shown; when the goods come out from the B shelf mechanism and are conveyed to the corresponding turning mechanism 71 of the B shelf mechanism, at this time, it is necessary to change the current conveying direction of this turning mechanism to the conveying direction to the output port, and at the same time, adjust the conveying directions of the turning mechanisms corresponding to the C and D shelf mechanisms, see Figure 9 so as to ensure that it can be conveyed to the output port.

[0061] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0062] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc) and includes several instructions for causing a computer terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0063] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the present invention and the claims. These all fall within the protection scope of the present invention.

Claims

1. A cold transport device for convenient unloading, comprising a transport vehicle (1), characterized in that: A refrigerated cargo box (2) is provided on the transport vehicle (1). A refrigeration compressor (3) is provided on the top of the refrigerated cargo box (2). A cargo box door (52) is provided at the tail of the refrigerated cargo box (2). At least three independent refrigeration chambers are provided in the refrigerated cargo box (2). A shelf mechanism (5) is provided in each refrigeration chamber. The shelf mechanism (5) includes: A conveying mechanism (54) arranged in a staggered array along the height direction of the refrigeration chamber in the refrigeration chamber, an inlet (51) provided at the top of each refrigeration chamber near the vehicle head, and an outlet (53) corresponding to the refrigeration chamber and provided on the cargo box door (52); wherein, opening and closing mechanisms (6) are provided on both the inlet (51) and the outlet (53). The opening and closing mechanism (6) is used to close or open the inlet (51) and the outlet (53); the shelf mechanism (5) further includes a plurality of baffles (55) rotatably arranged on the inner wall of each refrigeration chamber. Each baffle (55) corresponds to the output end of the conveying mechanism (54), and an elastic reset member (56) is provided on the rotating shaft of the baffle (55); Wherein, the opening and closing mechanism (6) includes: a retractable driving device (61) provided in the top wall of the refrigeration chamber / the cargo box door (52). The output end of the retractable driving device (61) is connected to a sealing plate (62). Sealing air bags (63) are fixedly connected to both sides of the sealing plate (62). A sealing cavity (64) is provided in the sealing plate (62). A piston plate (66) is piston-connected in the sealing cavity (64), and a gas passage communicating the sealing air bag (63) and the sealing cavity (64) is provided in the sealing plate (62); When the driving device (61) is in a contracted state, the sealing plate (62) is away from the inlet (51) / the outlet (53), and the sealing air bags (63) on both sides thereof are squeezed to discharge gas, so that the gas in the sealing air bag (63) enters the sealing cavity (64) through the gas passage, and pushes a part of the piston plate (66) to extend out of the sealing cavity (64). At this time, the inlet (51) / the outlet (53) is in an open state; When the driving device (61) extends to drive the sealing plate (62) to move towards the inlet (51) / the outlet (53), and when the telescopic plate (66) protruding from the front end of the sealing plate (62) is squeezed by the inner wall at the inlet (51) / the outlet (53) to compress the gas in the sealing cavity (64), the gas in the sealing cavity (64) enters the sealing air bags (63) on both sides through the gas passage, so that the sealing air bags (63) gradually expand at the inlet (51) / the outlet (53), and when the sealing plate (62) completely seals the inlet (51) / the outlet (53), the expanded sealing air bag (63) seals the inlet (51) / the outlet (53).

2. The cold transport device convenient for unloading according to claim 1, characterized in that: The piston plate (66) is connected to the inner wall of the sealing cavity (64) through an elastic member (65).

3. The cold transportation device for convenient unloading according to claim 2, wherein: The gas passage includes: a main passage extending along the movement direction of the piston plate and communicating with the sealing cavity (64), and shunt passages (67) located on both sides of the main passage and communicating with the main passage.

4. The cold transportation device for convenient unloading according to claim 3, characterized in that: The elastic member (65) is arranged in the main passage, and one end of the elastic member is fixedly connected to the bottom of the main passage, and the other end is fixedly connected to the piston plate (66) to limit / reset the piston plate.

5. The cold transportation device convenient for unloading according to claim 4, characterized in that: The elastic member (65) is a spring.

6. The cold transportation device convenient for unloading according to claim 1, wherein: A pull-out placement groove (4) is provided at the bottom of the refrigerated cargo box (2), and the placement groove (4) is used for placing a foldable refrigerated packaging box.

7. The cold transport device for convenient unloading according to claim 6, wherein: A sealing chamber is arranged on the inner wall of the refrigerated packaging box, and a cold storage material is stored in the sealing chamber.

8. A cold transportation device for convenient unloading according to any one of claims 1 to 7, characterized in that: Oblique stripes (57) are arranged on the outer wall of the baffle (55), and the oblique stripes (57) are used to guide the sliding direction of the goods.

9. A cold transportation device facilitating unloading according to any one of claims 1 to 7, characterized in that: The elastic reset member (56) is a scroll spring.

10. A cold transportation device facilitating unloading, according to any one of claims 1 to 7, characterized in that: The driving device is a telescopic motor or a hydraulic cylinder or a pneumatic cylinder.

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