Heat-insulation and cold-storage cold chain distribution equipment

Abstract

The invention discloses cold chain distribution equipment with heat insulation and refrigeration functions, and belongs to the technical field of cold chain transportation, the cold chain distribution equipment comprises a compartment mounted on a transport vehicle and refrigeration equipment assembled on the compartment, and a partition assembly used for partitioning an inner cavity of the compartment is assembled in the compartment; an inner cavity of the compartment is sequentially divided into a first storage cavity, a second storage cavity, a third storage cavity and a cold air cavity from left to right; through the arrangement of the partition assemblies and the heat insulation units, the interior of the compartment is divided into a plurality of storage cavities through the partition plates; each storage cavity is relatively independent, heat transfer among different storage areas can be reduced, meanwhile, goods do not need to be placed according to the unloading sequence, the space of each storage cavity can be adjusted by inflating the air bag, the heat insulation effect is maximized, and meanwhile in the inflating process, the air bag is inflated, so that the heat insulation effect is improved. The air is cooled by the cold air cavity in the pipeline and then is fed into the air bag, so that the heat insulation effect is further enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of cold chain transportation, and in particular to a cold chain distribution device for heat insulation and refrigeration. Background Art

[0002] The cold chain, namely cold chain logistics, compared with normal temperature logistics, the main difference is that it needs to maintain a low temperature. When transporting food, cold chain logistics is most used. The cost of cold chain transportation is relatively high, and the utilization rate of cold chain carriages has been developed to the extreme. Usually, cold chain carriages are filled with goods.

[0003] The goods stacking in the cold chain carriage usually follows the unloading sequence to ensure efficient operation. However, even with such an arrangement, when the vehicle arrives at the first distribution point and the carriage door is opened for unloading, problems arise. Once the carriage door is opened, it remains open continuously, resulting in continuous influx of external hot gas into the carriage, and the internal temperature of the carriage gradually rises. This temperature change not only affects the refrigeration effect of the goods near the current unloading area, but also may affect other unloaded goods in the carriage, especially posing a threat to the quality of temperature-sensitive food goods. In addition, after unloading is completed and the carriage door is closed, the time required for the carriage to cool down again is prolonged, further exacerbating the risk of damage to the goods quality. Summary of the Invention

[0004] The purpose of the present invention is to propose a cold chain distribution device for heat insulation and refrigeration to solve the problem that once the carriage door is opened, it remains open continuously, resulting in continuous influx of external hot gas into the carriage, and the internal temperature of the carriage gradually rises. This temperature change not only affects the refrigeration effect of the goods near the current unloading area, but also may affect other unloaded goods in the carriage, especially posing a threat to the quality of temperature-sensitive food goods.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme: A cold chain distribution device for heat insulation and refrigeration, including a carriage installed on a transport vehicle and a refrigeration device assembled on the carriage. A partition component for partitioning the inner cavity of the carriage is assembled in the carriage, so that the inner cavity of the carriage is sequentially partitioned into a first storage cavity, a second storage cavity, a third storage cavity and a cold air cavity from left to right. An air supply unit for sending cold air into the first storage cavity, the second storage cavity and the third storage cavity respectively is assembled on a side wall of the cold air cavity; Heat insulation units are assembled in the first storage cavity, the second storage cavity and the third storage cavity. The heat insulation unit includes an airbag, and a retaining frame for making it shrink into an inclined and taut shape is assembled in the airbag. An air supply unit for inflating the airbag is assembled in the cold air cavity; After the goods are placed in the divided areas inside the carriage, the air supply unit sends the gas cooled by the cold air cavity into the airbag, so that the airbag wraps the goods and fills the extra space. At the same time, the cooled gas in the airbag can act as a heat insulation layer to slow down the speed of heat exchange between the inside and outside of the carriage.

[0006] As a further description of the above technical solution: The partition assembly includes side plates assembled on the inner wall of the carriage. Three partitions for partitioning the inner cavity of the carriage are assembled on the side plates, and a pipe running frame is fixed at the top of the side plates.

[0007] As a further description of the above technical solution: A tailgate is assembled at the tail end of the carriage. Three side doors corresponding to the first storage cavity, the second storage cavity, and the third storage cavity are assembled on one side of the carriage. Installation grooves are provided on both sides of two of the partitions, one side of the other partition, one side of the side plate, and the inner side of one of the side doors. The airbag is detachably fixed in the installation grooves.

[0008] As a further description of the above technical solution: A U-shaped air inlet cavity is provided inside the partition. A plurality of air outlet holes distributed in a U-shape are provided on one side wall of the three U-shaped air inlet cavities for blowing air into the first storage cavity, the second storage cavity, and the third storage cavity respectively, so that the air blown out through the air outlet holes can wrap the stored goods.

[0009] As a further description of the above technical solution: The air supply unit includes three air supply pipes fixed on the inner wall of the cold air cavity. Solenoid valves for controlling the air volume are assembled on the three air supply pipes. A wind guide cover is detachably fixed at the inlet end of the air supply pipe. The outlet end of one of the air supply pipes is communicated with one of the U-shaped air inlet cavities, and the ends of the other two air supply pipes passing through the pipe running frame are respectively communicated with the other two U-shaped air inlet cavities.

[0010] As a further description of the above technical solution: The air supply unit includes an air pump fixed on the outer wall of the carriage. An inflation pipe is assembled at the output end of the air pump. A four-way solenoid valve is assembled at the end of the inflation pipe passing into the cold air cavity. The other three connection ends of the four-way solenoid valve are all assembled with air supply pipes.

[0011] As a further description of the above technical solution: One end of one of the air supply pipes that penetrates into the pipe routing frame is connected to one of the air bags in the first storage cavity. A T-shaped branch pipe is fixedly connected to the air supply pipe. One end of the T-shaped branch pipe that penetrates into one of the U-shaped air inlet cavities is connected to the air bag located on the partition plate in the first storage cavity, and the other end of the T-shaped branch pipe that penetrates and passes through one of the U-shaped air inlet cavities is connected to the air bag on the side compartment door.

[0012] As a further description of the above technical solution: One end of the air supply pipe located in the middle that penetrates into the U-shaped air inlet cavity connected to the second storage cavity through the pipe routing frame is connected to one of the air bags in the second storage cavity. Two first branch pipes are fixedly connected to the air supply pipe. One end of one of the first branch pipes is connected to the air bag located on the side plate in the second storage cavity, and one end of the other first branch pipe penetrates into the U-shaped air inlet cavity connected to the second storage cavity and is connected to another air bag in the second storage cavity.

[0013] As a further description of the above technical solution: One end of the other air supply pipe that penetrates into the U-shaped air inlet cavity connected to the second storage cavity through the pipe routing frame is connected to one of the air bags in the third storage cavity. Two second branch pipes are fixedly connected to the air supply pipe. One end of one of the second branch pipes is connected to the air bag located on the side plate in the third storage cavity, and one end of the other second branch pipe penetrates into the U-shaped air inlet cavity connected to the third storage cavity and is connected to another air bag in the third storage cavity.

[0014] As a further description of the above technical solution: The air outlet end of the refrigeration device is connected to the cold air cavity. An exhaust hole is provided on the side compartment door, and a one-way solenoid valve for exhausting outward is assembled in the exhaust hole.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By providing the partition component and the heat insulation unit, the interior of the carriage is divided into multiple storage cavities by the partition plate. Each storage cavity is relatively independent, which helps to reduce the heat transfer between different storage areas. At the same time, there is no need to place the goods in the order of unloading. And by inflating the air bags, the space of each storage cavity can be adjusted to ensure the maximum heat insulation effect. At the same time, during the inflation process, the gas is cooled in the cold air cavity in the pipeline and then sent into the air bag, further enhancing the heat insulation effect; Meanwhile, when unloading, it is only necessary to open the side compartment door corresponding to the goods, which will not affect the remaining goods, enabling the remaining goods to remain in the refrigerated state, avoiding being affected, ensuring the quality of food goods. At the same time, there is no need to re-cool after closing the door again, and after unloading, the air supply to this area can be stopped, reducing energy consumption. Brief Description of the Drawings

[0016] Figure 1 Shows a schematic structural diagram from the first perspective according to an embodiment of the present invention; Figure 2 Shows a schematic structural diagram of the interior of the carriage according to an embodiment of the present invention; Figure 3 Shows a schematic structural diagram of the interior after partial dissection of the partition and the pipe - walking frame according to an embodiment of the present invention; Figure 4 Shows a schematic structural diagram of the dissected partition according to an embodiment of the present invention; Figure 5 Shows a schematic structural diagram of the interior of the whole carriage after dissection according to an embodiment of the present invention; Figure 6 Shows a schematic structural diagram of the connection state between the airbag and the air supply pipe according to an embodiment of the present invention; Figure 7 Shows a schematic structural diagram of the interior of the airbag according to an embodiment of the present invention; Figure 8 Shows a schematic structural diagram from the second perspective according to an embodiment of the present invention.

[0017] Legend Explanation: 10, carriage; 11, refrigeration equipment; 12, side compartment door; 20, separation assembly; 21, side plate; 22, partition; 23, pipe - walking frame; 30, heat - insulation unit; 31, airbag; 32, retaining frame; 40, air - supply unit; 41, air - supply pipe; 42, solenoid valve; 43, air - guiding cover; 44, U - shaped air - inlet cavity; 50, air - supply unit; 51, air pump; 52, charging pipe; 53, four - way solenoid valve; 54, air - supply pipe; 55, T - shaped branch pipe; 56, first branch pipe; 57, second branch pipe. Detailed Description of the Invention

[0018] 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 only a part of the embodiments of the present invention, rather than all the embodiments. 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.

[0019] As Figure 1 - Figure 8 shown, the present invention provides: A cold chain distribution device for heat insulation and refrigeration, including a carriage 10 installed on a transport vehicle and a refrigeration device 11 assembled on the carriage 10. Specifically, the refrigeration device 11 is an air-cooled type, which is a well-known technology and will not be elaborated here. The air outlet end of the refrigeration device 11 is communicated with a cold air cavity. An exhaust hole is provided on the side compartment door 12, and a one-way solenoid valve for exhausting outward is assembled in the exhaust hole. Preferably, a plurality of temperature and humidity sensors corresponding to each storage cavity are assembled in the carriage 10. A partition component 20 for partitioning the inner cavity of the carriage 10 is assembled in the carriage 10, so that the inner cavity of the carriage 10 is sequentially partitioned into a first storage cavity, a second storage cavity, a third storage cavity and a cold air cavity from left to right. A tail compartment door is assembled at the tail end of the carriage 10, and three side compartment doors 12 corresponding to the first storage cavity, the second storage cavity and the third storage cavity respectively are assembled on one side of the carriage 10; Specifically, after the one-way solenoid valve is opened, the cold air continuously enters the storage cavity and mixes with the hot air and is continuously exhausted outward. During the exhaust process, due to the one-way flow of the one-way solenoid valve, the external hot air cannot enter the storage cavity through the exhaust hole.

[0020] As Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the partition component 20 includes a side plate 21 assembled on the inner wall of the carriage 10. Three partition plates 22 for partitioning the inner cavity of the carriage 10 are assembled on the side plate 21, and a pipe-walking frame 23 is fixed at the top of the side plate 21; Specifically, the inner cavity of the carriage 10 is partitioned into a first storage cavity, a second storage cavity and a third storage cavity by the partition plates 22, and the sizes of the three storage cavities are different, so that when loading goods, a suitable storage cavity can be selected according to the quantity of the goods. At the same time, each storage cavity is relatively independent, which helps to reduce the heat transfer between different storage areas. Moreover, when unloading goods, only the corresponding side compartment door 12 of the goods needs to be opened. After opening, only the storage cavity of the goods is exposed, and the remaining goods are still in their respective storage cavities and will not be affected.

[0021] As Figure 2 , Figure 3 , Figure 5 , Figure 6 andFigure 7 As shown, heat insulation units 30 are assembled in the first storage cavity, the second storage cavity, and the third storage cavity. The heat insulation unit 30 includes an airbag 31, and a retaining frame 32 for making it shrink into an inclined and tightened state is assembled in the airbag 31. Installation grooves are provided on both sides of two of the partition plates 22, one side of the other partition plate 22, one side of the side plate 21, and the inner side of one of the side compartment doors 12. The airbag 31 is detachably fixed in the installation groove. Preferably, airbags 31 are also provided on the tailgate and the other two side compartment doors 12, and are respectively connected to three air supply pipes 54, so that there are airbags 31 around each storage cavity, forming a surrounding wrap for the goods, and being able to closely adhere to the goods after inflation, forming a continuous heat insulation layer, effectively blocking the intrusion of external heat or ensuring the internal refrigeration effect; Preferably, a cold storage material is provided on the inner wall of the airbag 31. The cold storage material can absorb and store cold energy and release it when the temperature inside the carriage 10 rises, thereby helping to maintain the temperature stability inside the carriage 10, reducing the temperature fluctuation inside the carriage 10, improving the refrigeration effect, and also reducing the running time and energy consumption of the refrigeration equipment 11 inside the carriage 10; After the goods are placed in the compartments of the carriage 10, the air supply unit 50 is used to send the gas cooled by the cold air cavity into the airbag 31, so that the airbag 31 forms a wrap for the goods and fills the extra space. At the same time, the cooled gas in the airbag 31 can serve as a heat insulation layer, slowing down the speed of heat exchange between the inside and outside of the carriage 10; Specifically, after the gas is filled into the airbag 31, since the gas itself is a poor conductor of heat and its heat conduction performance is relatively poor, when the airbag 31 is filled with gas, these gas layers can serve as a heat insulation layer, slowing down the speed of heat exchange between the inside and outside of the carriage 10. At the same time, the airbag 31 is made of a material with a certain thickness and elasticity, so that it itself also has a certain heat insulation performance, which can further reduce the heat transfer; Particularly, after all the goods are unloaded, if condensation occurs on the surface of the airbag 31 due to the temperature difference, the gas in the airbag 31 is discharged outward through the air pump 51, so that the airbag 31 gradually returns to its original state. During the restoration process, the retaining frame 32 will drive the airbag 31 into a V shape, and then the condensation can be quickly drained away; Preferably, the gas cooled by the cold air cavity and sent into the airbag 31 through the air supply unit 50 is one of air (thermal conductivity coefficient is 0.0257 W / (m·K)), nitrogen (thermal conductivity coefficient is 0.0259 W / (m·K)), carbon dioxide (thermal conductivity coefficient is 0.0146 W / (m·K)), or argon (thermal conductivity coefficient is 0.0163 W / (m·K)), or a mixed gas of these gases.

[0022] Such as Figure 2 、 Figure 5 and Figure 8As shown, on one side wall of the cold air chamber, a air supply unit 40 is assembled for sending cold air into the first storage chamber, the second storage chamber, and the third storage chamber respectively; A U-shaped air inlet chamber 44 is formed in the partition plate 22. On one side wall of the three U-shaped air inlet chambers 44, a number of air outlet holes are respectively formed in a U-shaped distribution for sending air into the first storage chamber, the second storage chamber, and the third storage chamber, so that the air blown out through the air outlet holes can wrap the stored goods; The air supply unit 40 includes three air supply pipes 41 fixed on the inner wall of the cold air chamber. Solenoid valves 42 for controlling the air volume are assembled on the three air supply pipes 41. The inlet end of the air supply pipe 41 is detachably fixed with a wind guide cover 43. The outlet end of one of the air supply pipes 41 is communicated with one of the U-shaped air inlet chambers 44, and the ends of the other two air supply pipes 41 passing into the pipe walking frame 23 are respectively communicated with the other two U-shaped air inlet chambers 44; Specifically, after the refrigeration device 11 is started, the cold air enters the cold air chamber, then enters the air supply pipe 41 through the wind guide cover 43, then enters the U-shaped air inlet chamber 44, and then enters each storage chamber through the air outlet holes in the U-shaped air inlet chamber 44. At the same time, according to the refrigeration requirements of the goods in each storage chamber, the solenoid valve 42 can control the air supply volume of each storage chamber to meet the temperature requirements of different goods. At the same time, the design of the air outlet holes arranged in a U-shaped manner enables the cold air to blow uniformly and in a wrapping manner towards the goods, improving the refrigeration efficiency and uniformity.

[0023] Such as Figure 2 、 Figure 5 and Figure 8 As shown, a gas supply unit 50 for inflating the airbag 31 is assembled in the cold air chamber. The gas supply unit 50 includes an air pump 51 fixed on the outer wall of the carriage 10. The output end of the air pump 51 is assembled with an air charging pipe 52. The end of the air charging pipe 52 passing into the cold air chamber is assembled with a four-way solenoid valve 53. The other three connection ends of the four-way solenoid valve 53 are all assembled with air supply pipes 54; One of the air supply pipes 54 is communicated with one of the airbags 31 in the first storage chamber at the end passing into the pipe walking frame 23. A T-shaped branch pipe 55 is fixedly communicated with this air supply pipe 54. The end of the T-shaped branch pipe 55 passing into one of the U-shaped air inlet chambers 44 is communicated with the airbag 31 on the partition plate 22 in the first storage chamber, and the other end of the T-shaped branch pipe 55 passing into and passing through one of the U-shaped air inlet chambers 44 is communicated with the airbag 31 on the side compartment door 12; The central air supply pipe 54 passes through the pipe routing frame 23 and penetrates into one end of the U-shaped air inlet cavity 44 communicating with the second storage cavity, where it is connected to one of the air bags 31 located in the second storage cavity. Two first branch pipes 56 are fixedly connected to the air supply pipe 54. One end of one of the first branch pipes 56 is connected to the air bag 31 located on the side plate 21 in the second storage cavity, and one end of the other first branch pipe 56 penetrates into the U-shaped air inlet cavity 44 communicating with the second storage cavity and is connected to another air bag 31 in the second storage cavity; One end of the other air supply pipe 54 passes through the pipe routing frame 23 and penetrates into the U-shaped air inlet cavity 44 communicating with the second storage cavity, where it is connected to one of the air bags 31 located in the third storage cavity. Two second branch pipes 57 are fixedly connected to the air supply pipe 54. One end of one of the second branch pipes 57 is connected to the air bag 31 located on the side plate 21 in the third storage cavity, and one end of the other second branch pipe 57 penetrates into the U-shaped air inlet cavity 44 communicating with the third storage cavity and is connected to another air bag 31 in the third storage cavity; Specifically, the four-way solenoid valve 53 can control the connection between the air charging pipe 52 and different air supply pipes 54, enabling the air bags 31 in different storage cavities to be inflated separately to meet different requirements. At the same time, during the inflation process, since part of the air charging pipe 52 and the air supply pipe 54 are located in the cold air cavity, the gas entering the pipe will be cooled, so that the gas filled into the air bag 31 is a cooling gas, further enhancing the heat insulation and refrigeration effect.

[0024] Specifically, when this heat insulation and refrigeration cold chain distribution equipment is working / in use: 1. Loading goods: According to the quantity and size of the goods, select a suitable first storage cavity, second storage cavity or third storage cavity for loading. Neatly place the goods into the selected storage cavity, ensuring there is a certain gap between the goods to facilitate the circulation of cold air; 2. Closing the side compartment door 12 and starting the refrigeration equipment 11: Close the side compartment door 12 corresponding to the storage cavity where the goods are loaded, ensuring that the side compartment door 12 is tightly closed and well-sealed to prevent external hot air from entering. Then start the refrigeration equipment 11 to make it start working and generate cold air, which will be sent into the cold air cavity to prepare for subsequent air supply and inflation of the air bag 31; 3. Setting air supply and cold air wrapping: According to the refrigeration requirements of the goods in the selected storage cavity, adjust the air volume of the air supply pipe 41 through the solenoid valve 42 to ensure that each storage cavity can obtain an appropriate amount of cold air. The cold air enters the air supply pipe 41 through the air guide cover 43 and then enters the three U-shaped air inlet cavities 44 respectively. The cold air blows uniformly and in a wrapping manner towards the goods from the air outlet holes of the U-shaped air inlet cavities 44, improving the refrigeration efficiency and uniformity; 4. Inflation and heat insulation of the airbag 31: The four-way solenoid valve 53 is used to control the connection between the inflation pipe 52 and different air supply pipes 54, selectively inflating the airbags 31 in different storage cavities. The gas filled into the airbags 31 is cooled by the cold air in the cold air cavity, so it is a cooling gas. After the airbags 31 are inflated, they closely adhere to the goods, forming a continuous heat insulation layer, effectively blocking the intrusion of external heat. The cold storage material in the airbags 31 can absorb and store cold, helping to maintain the temperature stability in the carriage 10; 5. Monitoring and adjustment: During the entire distribution process, continuously monitor the temperature and humidity in the carriage 10 to ensure that the goods are in the best cold storage state. As needed, optimize the air supply volume and the inflation volume of the airbags 31 by adjusting the solenoid valve 42 and the four-way solenoid valve 53 to meet the cold storage requirements of different goods; 6. Unloading and cleaning: After arriving at the destination, open the corresponding side compartment door 12, take out the goods from the storage cavity. After unloading, close the side compartment door 12, and disconnect the power supplies of the refrigeration equipment 11 and the air pump 51 to carry out the cleaning and maintenance of the equipment.

[0025] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A heat-insulated refrigerated cold chain distribution device, comprising a carriage (10) installed on a transport vehicle and a refrigeration device (11) mounted on the carriage (10), characterized in that: The compartment (10) is equipped with a partition assembly (20) for partitioning its inner cavity, so that the inner cavity of the compartment (10) is sequentially divided from left to right into a first storage cavity, a second storage cavity, a third storage cavity and a cold air cavity, and a side wall of the cold air cavity is equipped with an air supply unit (40) for supplying cold air to the first storage cavity, the second storage cavity and the third storage cavity respectively; The first storage chamber, the second storage chamber and the third storage chamber are each equipped with a heat insulation unit (30), the heat insulation unit (30) comprising an air bag (31), the air bag (31) being equipped with a baffle (32) for shrinking the air bag to an inclined and tightened state, and the cold air chamber being equipped with an air supply unit (50) for inflating the air bag (31); After the cargo is placed in the compartment (10), the gas cooled by the cold air chamber is fed into the airbag (31) through the air supply unit (50), so that the airbag (31) wraps the cargo and fills the excess space. At the same time, the cooled gas in the airbag (31) can serve as a heat insulation layer to slow down the speed of heat exchange between the inside and outside of the compartment (10).

2. The heat-insulated and refrigerated cold chain distribution equipment according to claim 1, characterized in that: The partition assembly (20) comprises a side plate (21) mounted on the inner wall of the carriage (10), three partitions (22) for partitioning the inner cavity of the carriage (10) being mounted on the side plate (21), and a pipe running frame (23) being fixed on the top of the side plate (21).

3. The heat-insulated and refrigerated cold chain distribution equipment according to claim 2, characterized in that: The rear end of the vehicle compartment (10) is equipped with a tailgate, and one side of the vehicle compartment (10) is equipped with three side compartment doors (12) corresponding to the first storage cavity, the second storage cavity, and the third storage cavity, respectively. Both sides of the two partitions (22), one side of another partition (22), one side of the side panel (21), and the inner side of one of the side compartment doors (12) are provided with mounting grooves, and the airbag (31) is detachably fixed in the mounting groove.

4. The heat-insulated and refrigerated cold chain distribution equipment according to claim 2, characterized in that: A U-shaped air inlet cavity (44) is provided in the partition plate (22), and one side wall of the three U-shaped air inlet cavities (44) is provided with a plurality of air outlet holes distributed in a U-shape for supplying air to the first storage cavity, the second storage cavity, and the third storage cavity, so that the air blown out through the air outlet holes can wrap the stored goods.

5. The heat-insulated and refrigerated cold chain distribution equipment according to claim 4, characterized in that: The air supply unit (40) comprises three air supply pipes (41) fixed on the inner wall of the cold air chamber, each of the three air supply pipes (41) being equipped with a solenoid valve (42) for controlling the air volume, an air guide cover (43) being detachably fixed at the inlet end of the air supply pipe (41), the outlet end of one of the air supply pipes (41) being connected to one of the U-shaped air inlet chambers (44), and the ends of the other two air supply pipes (41) penetrating into the pipe guide frame (23) being respectively connected to the other two U-shaped air inlet chambers (44).

6. The heat-insulated and refrigerated cold chain distribution equipment according to claim 1, characterized in that: The air supply unit (50) comprises an air pump (51) fixed on the outer wall of the vehicle compartment (10); an output end of the air pump (51) is equipped with an air charging pipe (52); one end of the air charging pipe (52) that penetrates into the cold air chamber is equipped with a four-way solenoid valve (53); and the other three connection ends of the four-way solenoid valve (53) are each equipped with an air supply pipe (54).

7. The heat-insulated and refrigerated cold chain distribution equipment according to claim 6, characterized in that: One end of one of the air supply pipes (54) passing through the pipe guide frame (23) is connected to one of the air bags (31) in the first storage chamber. A T-shaped branch pipe (55) is fixedly connected to the air supply pipe (54). One end of the T-shaped branch pipe (55) passing through one of the U-shaped air inlet chambers (44) is connected to the air bag (31) located on the partition (22) in the first storage chamber. The other end of the T-shaped branch pipe (55) passing through and penetrating one of the U-shaped air inlet chambers (44) is connected to the air bag (31) on the side compartment door (12).

8. The heat-insulated and refrigerated cold chain distribution equipment according to claim 6, characterized in that: The air supply pipe (54) located in the middle passes through the pipe frame (23) into a U-shaped air inlet chamber (44) connected to the second storage chamber, and one end of the air supply pipe (54) is connected to one of the air bags (31) located in the second storage chamber. Two first branch pipes (56) are fixedly connected to the air supply pipe (54), one end of one of the first branch pipes (56) is connected to the air bag (31) located on the side plate (21) in the second storage chamber, and one end of the other first branch pipe (56) passes through the U-shaped air inlet chamber (44) connected to the second storage chamber and is connected to another air bag (31) in the second storage chamber.

9. The heat-insulated and refrigerated cold chain distribution equipment according to claim 6, characterized in that: Another air supply pipe (54) passes through the pipe guide frame (23) into a U-shaped air inlet chamber (44) connected to the second storage chamber, and one end of the air supply pipe (54) is connected to one of the air bags (31) in the third storage chamber. Two second branch pipes (57) are fixedly connected to the air supply pipe (54), one end of one of the second branch pipes (57) is connected to the air bag (31) located on the side plate (21) in the third storage chamber, and one end of the other second branch pipe (57) passes through the U-shaped air inlet chamber (44) connected to the third storage chamber, and is connected to another air bag (31) in the third storage chamber.

10. The heat-insulated and refrigerated cold chain distribution equipment according to claim 3, characterized in that: The air outlet end of the refrigeration device (11) is connected to the cold air cavity, and the side compartment door (12) is provided with an exhaust hole, in which a one-way solenoid valve for exhausting air to the outside is installed.

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