Energy-saving cold chain distribution vehicle for string point distribution

Abstract

The invention relates to the technical field of transfer vehicles, in particular to an energy-saving cold chain distribution vehicle for string point distribution, which comprises a transport vehicle, a refrigerated container is arranged on the transport vehicle, a refrigeration compressor is arranged at the top of the refrigerated container, a plurality of shelf mechanisms are arranged in the refrigerated container, and each shelf mechanism comprises a conveyor belt, a plurality of chain wheels and a plurality of chain wheels, the diversion conveyor belt is arranged at the top of the refrigerated container, a steering mechanism is arranged on the diversion conveyor belt corresponding to the conveyor belt on the top layer of each goods shelf mechanism, and the diversion conveyor belt is arranged at the bottom of the refrigerated container and corresponds to the output port. A steering mechanism is arranged on the shunting conveying belt corresponding to the conveying belt on the bottom layer of each goods shelf mechanism; and an opening / closing mechanism is arranged at the inlet and the outlet of the refrigerated container to control the 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 more specifically, to an energy-saving cold chain distribution vehicle for string point distribution. Background Art

[0002] Cold chain transport vehicles are mainly used for short-distance or medium-long-distance transportation of items with strict temperature requirements for transportation, 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, which includes 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 compressor used 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 box. The upper 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 a dynamic electric field type cold storage and preservation box based on a cold chain distribution vehicle, which includes a vehicle head, a vehicle bottom plate connected to the vehicle head, a cold storage and preservation box arranged on the vehicle bottom plate and behind the vehicle head, and a refrigeration device arranged outside the cold storage and preservation box. The cold storage and preservation box is composed of a cold storage and preservation box body, a warehouse door arranged at the tail of the cold storage and preservation box body, an air outlet structure arranged inside the cold storage and preservation box body, and an electric field generating structure arranged inside the cold storage and preservation box body. It generates cold air by setting an electric field generating structure in the cold chain vehicle, and at the same time sets an air outlet structure to blow the cold air to various positions in the preservation box, thereby prolonging the preservation time of the cold storage and preservation box and further realizing longer transportation.

[0005] Another example is that the utility model patent with the publication number CN209738916U discloses a multi-temperature zone intelligent cold chain distribution vehicle, which includes a vehicle body, a box body, an embedded automatic ladder, a folding movable door, a first ventilation system, and a second ventilation system. By setting 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. At the same time, the temperatures of the two refrigerated storage spaces can be controlled by a numerical control fan; by setting 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 chain delivery vehicle. Summary of the Invention

[0008] The purpose of the present invention is to provide an energy-saving cold chain delivery vehicle for serial point delivery, which can partially solve or alleviate at least some 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, which causes discomfort to the staff.

[0009] To achieve the above object, the present invention provides the following technical solutions: An energy-saving cold chain delivery vehicle for serial point delivery includes a transport vehicle, a refrigerated cargo box is provided on the transport vehicle, a refrigeration compressor is provided on the top of the refrigerated cargo box, a cargo box door is provided at the rear of the refrigerated cargo box, a sealed cavity for accommodating cold storage material is provided on the inner wall of the refrigerated cargo box, and cold storage material is stored in each sealed cavity, an entrance is provided at the top of the refrigerated cargo box, an output port is provided at the bottom of the cargo box door, and a plurality of shelf mechanisms are arranged in parallel in the refrigerated cargo box, the shelf mechanisms including: A conveyor belt arranged in a staggered array along the height direction of the refrigerated cargo box, a diversion conveyor belt arranged at the top of the refrigerated cargo box corresponding to the inlet, a steering mechanism arranged on the conveyor belt of the diversion conveyor belt corresponding to the top layer of each shelf mechanism, and a diversion conveyor belt arranged at the bottom of the refrigerated cargo box corresponding to the outlet, and a steering mechanism is arranged on the conveyor belt of the diversion conveyor belt corresponding to the bottom layer of each shelf mechanism; Wherein, opening and closing mechanisms are arranged on both the inlet and the outlet, and the opening and closing mechanisms are used to close and open the inlet and the outlet; the opening and closing mechanisms include: A retractable driving device arranged on the top wall of the refrigerated chamber / inside the cargo box door, the output end of the retractable 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 inside the sealing cavity, and a gas channel 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 / outlet, and the sealing air bags on both sides of it are squeezed to discharge gas, so that the gas enters the sealing cavity through the gas channel and pushes a part of the piston plate to extend out of the sealing cavity. At this time, the inlet / outlet is in an open state; When the driving device extends to drive the sealing plate to move towards the inlet / outlet, and when the telescopic plate protruding from the front end of the sealing plate is compressed by the inner wall of the inlet / outlet, the gas in the sealing cavity enters the sealing air bags on both sides through the gas channel, so that the sealing air bags expand at the inlet / outlet, and when the sealing plate completely seals the inlet / the outlet, the expanded sealing air bags seal the inlet / the outlet.

[0010] In some embodiments, the energy-saving cold chain distribution vehicle further includes a plurality of baffles rotatably arranged on the inner wall of the refrigerated chamber, each baffle corresponding to the output end of the conveyor belt, wherein, an elastic reset member is arranged on the rotating shaft of the baffle.

[0011] In some embodiments, the gas channel includes: a main channel extending along the movement direction of the piston plate and communicating with the sealing cavity, and diversion channels located on both sides of the main channel and communicating with the main channel; and / or, the piston plate is connected to the inner wall of the sealing cavity through an elastic member.

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

[0013] In some embodiments, the energy-saving cold chain delivery vehicle further includes a liftable limit baffle, which is arranged between the output end of the conveyor belt at the bottom layer of each shelf mechanism and the shunt conveyor belt.

[0014] In some embodiments, the top of the limit baffle is arc-shaped.

[0015] In some embodiments, a 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; a sealed cavity for containing a cold storage material is arranged inside the box wall of the refrigerated packaging box, and the cold storage material is stored in the sealed cavity.

[0016] In some embodiments, the phase change temperature of the cold storage material is -26°C to -20°C.

[0017] 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.

[0018] In some embodiments, the energy-saving cold chain delivery vehicle further includes a temporary storage conveyor belt arranged at the output port.

[0019] By means of the above technical solutions, the present invention provides an energy-saving cold chain delivery for point-to-point delivery, which has at least the following beneficial effects: 1. By setting a plurality of small output ports to replace the traditional way of opening and closing the entire cargo box door, combined with the sealing structure of the sealing airbag and the sealing plate, the loss of cold air is effectively controlled, the refrigeration energy consumption is greatly reduced, and the heat preservation stability during the cold chain transportation is improved.

[0020] 2. The present invention uses a multi-layer electric conveyor belt 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 delivery process of the cold chain delivery vehicle have a fixed order. Therefore, only need to put each cargo into the corresponding refrigerated cavity in sequence according to the order of the unloading points, and then only need to control the conveyor belt 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 do 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.

[0022] 4. For some small cold chain delivery vehicles that conduct point-to-point delivery within a certain area of a city (such as point-to-point delivery among multiple stations in a community, or point-to-point delivery from one community to another), it is not cost-effective to use a refrigerating machine for compression refrigeration for a long time. Therefore, in order to save the energy efficiency of the refrigerating machine as much as possible and reduce costs at the same time, in the present invention, a cold storage material is stored on the inner wall of the refrigerated cargo box. At the same time, each cargo is packaged with a packaging bag or box that stores the cold storage material and can be reused. On the one hand, the refrigerating machine compressor is turned on for a period of time, and is turned off in advance when the transportation is about to be completed (for example, only one station remains, or a station is about to be approached). Only the freezing environment provided by the cold storage material in the refrigerated cargo box and the cold storage material in the packaging bag / box is required, so as to achieve energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 need to be drawn 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 based on these drawings without creative efforts.

[0024] Figure 1 Structural schematic diagram of an embodiment of an energy-saving cold chain delivery vehicle for point-to-point delivery according to the present invention; Figure 2 Cross-sectional structural schematic diagram of a refrigerated cargo box in an embodiment of an energy-saving cold chain delivery vehicle for point-to-point delivery according to the present invention; Figure 3 Cross-sectional structural schematic diagram of a sealing plate in an embodiment of an energy-saving cold chain delivery vehicle for point-to-point delivery according to the present invention; Figure 4 Structural schematic diagram of a baffle in an embodiment of an energy-saving cold chain delivery vehicle for point-to-point delivery according to the present invention; Figure 5 Structural schematic diagram of another embodiment of an energy-saving cold chain delivery vehicle for point-to-point delivery according to the present invention; Figure 6 For Figure 5 Distribution schematic diagram between the diversion conveyor belt corresponding to the entrance and the top conveyor belt in each shelf mechanism in the refrigerated cargo box of the energy-saving cold chain delivery vehicle shown; Figure 7 For Figure 5 Schematic diagram of the diversion of a steering mechanism in the energy-saving cold chain delivery vehicle shown; Figure 8 For Figure 5 The distribution schematic diagram between the shunt conveyor belt corresponding to the output port and the bottom conveyor belt in each shelf mechanism in the refrigerated cargo box of the energy-saving cold chain distribution vehicle shown in Figure 5 Figure 9 For Figure 5 The schematic diagram of the goods output by the steering of multiple steering mechanisms on the shunt conveyor belt corresponding to the entrance of the energy-saving cold chain distribution vehicle shown in Figure 5 Figure 10 The schematic diagram of the structure with a temporary storage conveyor belt arranged in the refrigerated cargo box in another embodiment of the energy-saving cold chain distribution vehicle for string point distribution of the present invention Figure 11 For Figure 5 The schematic diagram of the staggered arrangement of the conveyor belts on each layer in the shelf mechanism of the energy-saving cold chain distribution vehicle shown in Figure 5

[0025] In the figure: 1, transport vehicle; 2, refrigerated cargo box; 3, compressor; 4, placement groove; 5, shelf mechanism; 51, entrance; 52, cargo box door; 53, output port; 54, conveyor belt; 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, shunt conveyor belt; 71, steering mechanism; 72, limit baffle; 73, temporary storage conveyor belt. Specific embodiments

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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.

[0027] In this article, suffixes such as "module", "component" or "unit" used to represent elements are only for the convenience of the description of the present invention, and they have no specific meaning in themselves. Therefore, "module", "component" or "unit" can be used interchangeably.

[0028] In this text, 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 drawings. They are 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 thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In this text, unless otherwise clearly defined and limited, terms such as "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 can also 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.

[0030] In this text, "and / or" includes any and all combinations of one or more of the listed related items.

[0031] In this text, "a plurality of" means two or more, that is, it includes two, three, four, five, etc.

[0032] In this text, "string-point distribution" means that a plurality of distribution stations (i.e., receiving stations) belong to a community or a region. Therefore, the sequence of the distribution route and the distribution stations is preset, and the distribution vehicle only needs to unload and deliver goods at the established distribution route and each distribution station on the route in the order of first-in, first-out. Usually, the sizes and specifications of the goods for string-point distribution do not vary much. Therefore, only one inlet and one outlet need to be set. Of course, for some scenarios where the specifications of the distributed goods vary greatly, multiple inlets and multiple outlets can also be set.

[0033] The following is a detailed description in combination with specific embodiments.

[0034] Embodiment 1: Please refer to Figure 1 - Figure 4 As shown, a technical solution provided by the present invention: An energy-saving cold-chain distribution vehicle for string-point distribution, 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.

[0035] 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 conveyor belt 54 arranged in a staggered array along the height direction of the refrigerating chamber is used for transporting goods; preferably, one end of the conveyor belt 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 conveyor belt 54 to automatically fall onto the next layer of the conveyor belt 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 can be 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; during 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.

[0036] In some embodiments, the above conveyor belt 54 is 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.

[0037] 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 conveyor belt 54 is a roller conveyor belt that does not require motor drive, and each layer of the conveyor belt is inclined downward at a certain angle, so that the goods can automatically move on the conveyor belt and go to the next layer of the conveyor belt. Preferably, 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 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.

[0038] During specific use, the goods are placed into the refrigerated container through the inlet 51 manually or by a manipulator. The goods first reach the top conveyor belt 54, then move away from the inlet 51 along the top conveyor belt 54, and then fall onto the second-layer conveyor belt 54. In this way, the goods are transmitted layer by layer downwards and finally output through the outlet 53 corresponding to the bottom conveyor belt 54. As a result, when loading and unloading, it is not necessary to open the large container door 52, which can not only reduce the large amount of cold air leakage but also eliminate the need for staff to enter the refrigerated container for manual handling.

[0039] 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 conveyor belt 54, a baffle 55 is arranged between the gap between each conveyor belt 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. Without external force, the baffle 55 remains almost horizontal under the elastic force of the scroll spring. When the goods fall from the conveyor belt 54 corresponding to the baffle 55 onto the baffle 55, the baffle 55 tilts downward, and then the goods fall onto the next-layer conveyor belt 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 force, maintaining the stability of each layer of the conveying system and being able to adapt to goods of different sizes and weights.

[0040] 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 forms a limit for the end of the roller conveyor belt.

[0041] Preferably, there are three groups of inlets 51 and outlets 53, which are respectively used for corresponding to three different specifications of goods, namely large, medium, and small. An opening and closing mechanism 6 is provided 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. [[ID=X]] [[ID=Y]]

[0042] In some embodiments, diagonal stripes 57 are provided 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.

[0043] 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 box 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.

[0044] 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 out until the sealing plate 62 closes the inlet 51 or the outlet 53. During the process that the sealing plate 62 gradually closes the inlet or the outlet, the piston plate 66 on the originally extended part of the sealing plate 62 is 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 seal the gaps 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. The shunt passages 67 communicate with the sealing airbags 63. Preferably, the elastic member is arranged in the main passage.

[0045] 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 box 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 box 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 of the piston plate 66 extend out of the sealing cavity 64, but it will not block the inlet / outlet.

[0046] When the energy-saving cold chain distribution for string-point distribution of the present invention is in use, start the energy-saving cold chain distribution for string-point distribution and set it to the refrigeration state. By controlling the operation of the compressor 3, the refrigerated cargo box 2 is cooled 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 conveyor belt 54 at the top, and are horizontally conveyed by the conveyor belt 54 to one end far from the inlet 51 and then automatically fall, successively falling onto the lower conveyor belt 54, forming a hierarchical transmission process. During the process of the goods falling from the upper conveyor belt 54 to the lower conveyor belt 54, the baffle 55, under the action of the volute 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. The electric conveyor belt 54 conveys the goods layer by layer to the bottom layer and then outputs them through the outlet 53. The outlet 53 is provided with a smaller-sized shipping opening, and 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 the air is introduced into the sealing airbag 63 through the gas passage 67, causing the sealing airbag 63 to expand and realizing airtight sealing on both sides of the sealing plate 62, further improving the sealing performance of the refrigeration environment.

[0047] 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 classifying. 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-keeping time when the refrigeration compressor does not work after a fault or power failure, a sealing cavity is provided on each side wall of the packaging box, and a cold storage material is stored in the sealing cavity. Preferably, the liquid cold storage material uses a cold storage material that remains liquid in a freezing 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.

[0048] During specific implementation, the goods in each refrigerated cavity are sequentially stored in the corresponding refrigerated cavity from the entrance in the order of their removal. For example, the goods removed first are placed first, and the goods removed later are placed later. Thus, when taking out goods from the storage area each time, it is only necessary to output the goods from the outlet in the corresponding order, without the need to open the large door for staff to enter the refrigerated container for operations such as picking up and transporting goods.

[0049] 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 within 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.

[0050] Embodiment 2: The present invention also provides another energy-saving cold chain distribution vehicle for string point distribution, 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 cavities for accommodating items of different specifications and sizes. Correspondingly, an entrance 5 is provided only at the top of the refrigerated container 2, and only one outlet 53 is provided at the bottom of the container door 52; and since there is no division of independent refrigerated cavities, 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 conveyor belts 54 arranged in a staggered array along the height direction of the refrigerated container 2, see Figure 11 .

[0051] Among them, the conveyor belt can adopt the conveyor belt driven by the above-mentioned motor, or the roller type conveyor belt without motor drive. Their working principles are the same and will not be elaborated here. Preferably, a roller type conveyor belt is adopted.

[0052] See Figure 6 and Figure 7 , since there is only one entrance 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 (first in, first out), in this embodiment, a diversion conveyor belt 70 is provided at the top of the refrigerated container 2 near the entrance. A steering mechanism 71 is provided on the diversion conveyor belt 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 pre-set on the goods to obtain the shelf and route to which the item belongs. Correspondingly, a diversion conveyor belt 70 is also provided at the outlet 53 of each last-layer conveyor belt, and a corresponding steering mechanism 71 is also provided on each diversion conveyor belt 70 corresponding to each shelf mechanism.

[0053] Of course, a liftable limit baffle 72 is provided at the output port of each bottom conveyor belt 70, see Figure 8 and Figure 9 When the corresponding goods need to be output from the corresponding conveyor belt, the limiting baffle 72 is lowered so that the goods can automatically slide onto the diversion conveyor belt 70. Preferably, the top cross-section of the limiting baffle 72 is arc-shaped, which is conducive to the sliding of the goods.

[0054] More preferably, a pressure sensor is positioned at the bottom or top of the limit baffle 72. When a pressure decrease is detected, the limit baffle 72 automatically rises, blocking the next item. Of course, if continuous delivery from the racking mechanism is required, the delivery vehicle's main control system directly controls the timing of the limit baffle's descent and rise. Preferably, the limit baffle 72 can be raised and lowered using a hydraulic cylinder or a pneumatic cylinder, and can communicate with the main control system via a wireless network.

[0055] In a specific implementation, when the goods currently fall into the steering mechanism 71 of the shelf mechanism 5 numbered A on the diverter conveyor 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 diverter conveyor 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.

[0056] Accordingly, when the goods on the bottom conveyor belt of the shelf mechanism numbered C are transported to the diverter conveyor belt 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 transported to the output port 53 through the diverter conveyor belt 70, see Figure 8 and Figure 9 .

[0057] Of course, as in Example 1, a baffle 55 is provided at the output end of each layer of conveyor belt 54 for buffering, see Figure 11 .

[0058] 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 conveyor belt 73 is also provided at the output port 53.Figure 10 Preferably, the temporary storage conveyor belt 73 is an electric conveyor belt.

[0059] In some embodiments, both the diversion conveyor belt 70 and the steering mechanism 71 are roller conveyor belts, and a rotating motor is provided inside the steering mechanism 71 to change the conveying direction of the roller conveyor belt through the rotating motor. Of course, in other embodiments, the diversion conveying mechanism 70 can also adopt a motor-driven conveyor belt.

[0060] 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.

[0061] The control principle of the main control system is described as follows: When receiving the distribution information sent by the scanning device corresponding to the steering mechanism 71 corresponding to the entry port 51 during incoming goods, the main control system can obtain the corresponding shelf mechanism number in the database (the database stores the distribution information of each item, including the unique identification code of the item, 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 item in the distribution information. If the current item 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 item needs to be distributed to other numbered shelf mechanisms, such as the shelf mechanism numbered B, the item 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 diversion conveyor belt 70, and then the current item will be conveyed to the shelf mechanism numbered B through this steering mechanism. The principle of conveying items to other shelf mechanisms is the same and will not be elaborated here.

[0062] When shipping goods, the main control system controls the limit baffle 72 corresponding to any shelf mechanism that needs to ship goods at present to rotate or descend, so as to release an item into the corresponding steering mechanism on the diversion conveyor belt 70. If the current shelf mechanism for shipping goods corresponds to the output port, the steering mechanism does not need to turn and directly waits for picking up goods. If the current shelf mechanism for shipping goods is not applied to the output port, the main control system controls the steering mechanism to turn and conveys it to the output port for shipping through other steering mechanisms between the steering mechanism and the output port in sequence.

[0063] Whether each steering mechanism 71 steers depends on the conveying direction of the goods. If the current conveying direction of the steering mechanism 71 is the same as that of the goods, there is no need for it to steer. If the current conveying direction of the steering mechanism 71 is different from that of the goods, it needs to steer. For example, if the current goods are located at the steering mechanism corresponding to the B shelf mechanism and its conveying direction is to be conveyed to the next steering mechanism, but the current conveying direction of the goods is to be conveyed to the B shelf mechanism, then this steering mechanism needs to steer so that its conveying direction changes from "conveyed to the next steering mechanism" to "conveyed to the B shelf mechanism", as Figure 6 and Figure 7 shown. Another example is that in the initial state, the conveying directions of all the steering mechanisms at the output end of the conveyor belt are to receive the goods from the shelf mechanism, as Figure 8 shown; when the goods come out from the B shelf mechanism and are conveyed to the steering mechanism 71 corresponding to the B shelf mechanism, at this time, it is necessary to change the current conveying direction of this steering mechanism to the conveying direction towards the output port. At the same time, the conveying directions of the steering mechanisms corresponding to the C and D shelf mechanisms need to be adjusted simultaneously, see Figure 9 so as to ensure that it can be conveyed to the output port.

[0064] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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 "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising that element.

[0065] 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. An energy-saving cold chain distribution vehicle for string point distribution, including 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). A sealed cavity for accommodating a cold storage material is provided on the inner wall of the refrigerated cargo box (2), and a cold storage material is stored in each sealed cavity. An inlet (51) is provided on the top of the refrigerated cargo box (2), and an outlet (53) is provided at the bottom of the cargo box door (52). A plurality of shelf mechanisms (5) are arranged in parallel in the refrigerated cargo box (2). The shelf mechanism (5) includes: Conveyor belts (54) arranged in a staggered array along the height direction of the refrigerated cargo box (2), a shunt conveyor belt (70) provided on the top of the refrigerated cargo box (2) corresponding to the inlet (51), a steering mechanism (71) provided on the shunt conveyor belt (70) corresponding to the conveyor belt (54) at the top layer of each shelf mechanism (5), and a shunt conveyor belt (70) provided at the bottom of the refrigerated cargo box (2) corresponding to the outlet (53), and a steering mechanism (71) is provided on the shunt conveyor belt (70) corresponding to the conveyor belt (54) at the bottom layer of each shelf mechanism (5); Wherein, opening and closing mechanisms (6) are provided on both the inlet (51) and the outlet (53), and the opening and closing mechanisms (6) are used to close and open the inlet (51) and the outlet (53); The opening and closing mechanism (6) includes: A retractable driving device (61) provided in the top wall of the refrigerated cavity / 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 bags (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 of it are squeezed to discharge gas, so that the gas 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) / outlet (53), and when the telescopic plate (66) protruding from the front end of the sealing plate (62) compresses the gas in the sealing cavity (64) under the extrusion of the inner wall at the inlet (51) / outlet (53), the gas in the sealing cavity (64) enters the sealing air bags (63) on both sides through the gas channels, causing the sealing air bags (63) to expand at the inlet (51) / outlet (53). And when the sealing plate (2) completely seals the inlet (51) / the outlet (53), the expanded sealing air bags (63) seal the inlet (51) / the outlet (53).

2. An energy-saving cold chain distribution vehicle for string point distribution according to claim 1, characterized in that: It further includes a plurality of baffle plates (55) rotatably arranged on the inner wall of the refrigerating chamber. Each baffle plate (55) corresponds to the output end of the conveyor belt (54). Wherein, an elastic reset member (56) is arranged on the rotating shaft of the baffle plate (55).

3. The energy-saving cold chain distribution vehicle for string point distribution according to claim 2, characterized in that: The gas channels include: a main channel extending along the movement direction of the piston plate and communicating with the sealing cavity (64), and shunt channels (67) located on both sides of the main channel and communicating with the main channel; and / or, the piston plate (66) is connected to the inner wall of the sealing cavity (64) through an elastic member (65).

4. The energy-saving cold chain distribution for string point distribution according to claim 3, characterized in that: The elastic member (65) is arranged in the main channel, and one end of it is fixedly connected to the bottom of the main channel, and the other end is fixedly connected to the piston plate (66) to limit / reset it.

5. An energy-saving cold chain distribution vehicle for string point distribution according to claim 1, characterized in that: It further includes a liftable limit baffle (72), and the limit baffle (72) is arranged between the output end of the conveyor belt (54) at the bottom layer of each shelf mechanism (5) and the shunt conveyor belt (70).

6. An energy-saving cold chain distribution vehicle for string point distribution according to claim 1, characterized in that: The top of the limit baffle (72) is arc-shaped.

7. An energy-saving cold chain distribution vehicle for string point distribution according to claim 1, characterized in that: A placement groove (4) is arranged at the bottom of the refrigerated cargo box (2), and the placement groove (4) is used to place a foldable refrigerated packaging box; a sealing cavity for containing a cold storage material is arranged inside the box wall of the refrigerated packaging box, and a cold storage material is stored in the sealing cavity.

8. The energy-saving cold chain distribution vehicle for string point distribution according to claim 7, wherein: The phase change temperature of the cold storage material is -26°C to -20°C.

9. An energy-saving cold chain distribution vehicle for string point distribution according to any one of claims 2 to 7, characterized in that: Oblique stripes (57) are arranged on the outer wall of the baffle plate (55), and the oblique stripes (57) are used to guide the sliding direction of the goods.

10. An energy-saving cold chain distribution vehicle for string point distribution according to any one of claims 1 to 7, characterized in that: It further includes a temporary storage conveyor belt (73) arranged at the outlet (53).

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