Layered fresh-keeping device for cold-chain logistics

Abstract

The invention discloses a layered fresh-keeping device for cold-chain logistics, which comprises a cold-storage fresh-keeping box body, and a ventilation plate for ventilating an article storage total space, and a first partition plate and a second partition plate for separating an inner cavity of the cold-storage fresh-keeping box body are arranged in the cold-storage fresh-keeping box body; a first article storage space adjusting plate and a second article storage space adjusting plate are arranged between the first partition plate and the second partition plate. The size of each article storage space can be adjusted according to the quantity of transported food such as vegetables and meat, and the temperature of each article storage space can be adjusted according to the preservation and storage temperature of the transported food such as vegetables and meat; therefore, workers can conveniently classify, preserve and store different amounts of food such as vegetables and meat every day, and the situation that some food goes bad and is damaged due to the fact that the storage and preservation temperatures of the transported food such as vegetables and meat are the same is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of cold chain logistics preservation, and specifically relates to a layered preservation device for cold chain logistics. Background Art

[0002] Cold chain logistics refers to a logistics method that ensures that goods remain fresh and of good quality during transportation, storage and distribution by controlling environmental conditions such as temperature and humidity throughout the entire logistics process. Layered fresh-keeping equipment is a commonly used equipment in cold chain logistics, mainly used to maintain the freshness and quality of goods.

[0003] When cold chain logistics carries out mixed transportation of vegetables, meat and other foods, different amounts of vegetables, meat and other foods need to be preserved, stored and transported every day. At this time, the storage space for items needs to be adjusted according to the amount of vegetables, meat and other foods transported. However, when the existing layered preservation devices for cold chain logistics are actually used, it is not convenient for the staff to adjust the storage space for items according to the amount of vegetables, meat and other foods transported every day. When some smaller amounts of food are stored in the storage space for items, the storage space for items will be wasted. Moreover, when the existing layered preservation devices for cold chain logistics are actually used, the transported vegetables, meat and other foods are preserved and stored at the same temperature. However, the preservation temperatures required for vegetables, meat and other foods are different. If vegetables, meat and other foods are preserved and stored at the same temperature, some foods will deteriorate and be damaged. Therefore, a layered preservation device for cold chain logistics is designed. Summary of the invention

[0004] In view of the defects or shortcomings of the layered preservation devices for cold chain logistics, the purpose of the present invention is to provide a layered preservation device for cold chain logistics, which can not only adjust the size of each storage space for each item according to the amount of vegetables, meat and other foods transported, but also adjust the temperature of each storage space for each item according to the temperature at which the transported vegetables, meat and other foods are preserved and stored. This not only makes it convenient for staff to classify and preserve different amounts of vegetables, meat and other foods every day, but also avoids the situation where some of the transported vegetables, meat and other foods are spoiled or damaged due to the same storage preservation temperature.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The present invention provides a layered fresh-keeping device for cold chain logistics, comprising a refrigerated fresh-keeping box, wherein a ventilation plate for ventilating a total storage space for articles and a first partition and a second partition for partitioning the internal cavity of the refrigerated fresh-keeping box are installed inside the refrigerated fresh-keeping box, and the cavity between the first partition and the second partition forms the total storage space for articles, and a first article storage space adjustment plate and a second article storage space adjustment plate for dividing the total storage space for articles into three article storage sub-spaces and adjusting the sizes of the three article storage sub-spaces are arranged between the first partition and the second partition, and the first article storage space adjustment plate is located on one side of the second article storage space adjustment plate;

[0007] The cavity between the ventilation plate and the first partition plate forms a total ventilation space, and a first cold air volume regulating plate and a second cold air volume regulating plate are arranged in the total ventilation space for dividing the total ventilation space into three ventilation sub-spaces and being able to adjust the sizes of the three ventilation sub-spaces, and the first cold air volume regulating plate is located on one side of the second cold air volume regulating plate;

[0008] The refrigeration and fresh-keeping box body is provided with a driving mechanism for driving the first cold air volume adjustment plate, the second cold air volume adjustment plate, the first article storage space adjustment plate and the second article storage space adjustment plate to perform linear motion in the X-axis direction.

[0009] Preferably, the ventilation plate, the first partition and the second partition are sequentially arranged inside the refrigerated fresh-keeping box from top to bottom, a cold air delivery pipe is arranged above the ventilation plate, the other end of the cold air delivery pipe passes through an outer wall of one side of the refrigerated fresh-keeping box and extends to the outside, a sealing ring is arranged at the connection between the cold air delivery pipe and the refrigerated fresh-keeping box, and an air outlet is opened at the bottom of the circumferential outer wall of the cold air delivery pipe, an exhaust duct is arranged below the outer wall of one side of the refrigerated fresh-keeping box, the cavity between the second partition and the inner bottom end of the refrigerated fresh-keeping box forms an exhaust space, and the interior of the exhaust duct is connected to the exhaust space, and a sealing door is arranged on the front end wall of the refrigerated fresh-keeping box.

[0010] Preferably, the cavity between one side outer wall of the first item storage space adjustment plate and one side inner wall of the refrigerated preservation box body forms a first item storage sub-space, the cavity between the other side outer wall of the first item storage space adjustment plate and one side outer wall of the second item storage space adjustment plate forms a second item storage sub-space, and the cavity between the other side outer wall of the second item storage space adjustment plate and the other side inner wall of the refrigerated preservation box body forms a third item storage sub-space.

[0011] Preferably, the cavity between one side outer wall of the first cold air volume adjustment plate and one side inner wall of the refrigerated fresh-keeping box forms a first ventilation sub-space, the cavity between the other side outer wall of the first cold air volume adjustment plate and one side outer wall of the second cold air volume adjustment plate forms a second ventilation sub-space, and the cavity between the other side outer wall of the second cold air volume adjustment plate and the other side inner wall of the refrigerated fresh-keeping box forms a third ventilation sub-space.

[0012] Preferably, the driving mechanism is provided with a stepper motor, the stepper motor is mounted on a mounting frame, and the mounting frame is mounted on an outer wall of one side of the refrigerated fresh-keeping box body, the output shaft on the stepper motor is connected to the first rotating shaft through a coupling, the other end of the first rotating shaft is mounted in a sealed bearing on an outer wall of one side of the refrigerated fresh-keeping box body, and a second belt drive assembly and a first belt drive assembly are arranged on the outer wall of the first rotating shaft, and the second belt drive assembly is located on one side of the first belt drive assembly, the first belt drive assembly is connected to the third belt drive assembly through a transmission belt, and the third belt drive assembly is mounted on one end of the first rotating assembly, the second belt drive assembly is connected to the fourth belt drive assembly through a transmission belt, and the fourth belt drive assembly is mounted on one end of the second rotating assembly.

[0013] Preferably, the first belt transmission assembly, the second belt transmission assembly, the third belt transmission assembly and the fourth belt transmission assembly are all provided with a hollow pulley, a transmission wheel is installed inside the hollow pulley, an annular protrusion is installed on the circumferential inner wall of the hollow pulley, the other end of the annular protrusion is installed in an annular installation groove, and the annular installation groove is opened on the circumferential outer wall of the transmission wheel;

[0014] A first groove is provided on the circumferential inner wall of the annular protrusion, and there are four first grooves, which are distributed in an annular array, and a first electromagnet is installed on the inner wall of one end of the first groove. A second groove is provided on the circumferential inner wall of the annular mounting groove, and there are four second grooves, which are distributed in an annular array, and a second electromagnet is installed on the inner wall of one end of the second groove. A first slider is arranged in the second groove, and a clearance fit is formed between the outer wall of the first slider and the groove wall of the second groove, and a first iron block and a second iron block are respectively installed on the end walls at both ends of the first slider.

[0015] Preferably, the first rotating assembly and the second rotating assembly are both provided with a second rotating shaft and a third rotating shaft, and the second rotating shaft is located on one side of the third rotating shaft, a third groove is provided at the center of the end wall of one end of the second rotating shaft, and a fourth electromagnet is installed on the inner wall of one end of the third groove, a second slider is provided inside the third groove, and a clearance fit is formed between the outer wall of the second slider and the groove wall of the third groove, and a third iron block and a fourth iron block are installed at both ends of the second slider respectively;

[0016] A third limit block is installed on the circumferential outer wall of the second sliding block, and the other end of the third limit block is installed in the fourth limit groove. The fourth limit groove is arranged on the circumferential inner wall of the third groove on the ground, and there is a clearance fit between the outer wall of the third limit block and the groove wall of the fourth limit groove. There are four third limit blocks and four fourth limit grooves, and the four third limit blocks and the four fourth limit grooves are distributed in a ring array. A fourth groove is opened at the center position of the end wall at one end of the third rotating shaft, and a third electromagnet is installed on the inner wall of one end of the fourth groove. A fifth limit groove is opened on the circumferential inner wall of the fourth groove, and there are four fifth limit grooves, and the four fifth limit grooves are distributed in a ring array, and the groove width and groove depth of the fifth limit groove are equal to the groove width and groove depth of the fourth limit groove.

[0017] Preferably, the first cold air volume regulating plate and the second cold air volume regulating plate are respectively mounted on the second rotating shaft and the third rotating shaft on the first rotating assembly, and second threaded holes are provided on the upper sides of the outer walls of the first cold air volume regulating plate and the second cold air volume regulating plate, and external threads are provided on the outer walls of the second rotating shaft and the third rotating shaft on the first rotating assembly, and the second threaded hole on the first cold air volume regulating plate and the external threads on the outer wall of the second rotating shaft on the first rotating assembly are threadedly matched and connected, and the second threaded hole on the second cold air volume regulating plate and the external threads on the outer wall of the third rotating shaft on the first rotating assembly are threadedly matched and connected;

[0018] The top and bottom ends of the first cold air volume adjusting plate and the second cold air volume adjusting plate are both installed with second limiting blocks, the second limiting blocks on the top ends of the first cold air volume adjusting plate and the second cold air volume adjusting plate are installed in the first limiting groove, the first limiting groove is arranged at the front and rear ends of the lower surface of the ventilation plate, the second limiting blocks on the bottom ends of the first cold air volume adjusting plate and the second cold air volume adjusting plate are installed in the second limiting groove on the upper surface of the first partition plate, the second limiting groove is arranged at the front and rear ends of the two side surfaces of the first partition plate, and the outer wall of the second limiting block and the groove wall of the first limiting groove and the groove wall of the second limiting groove are all clearance-matched;

[0019] Ventilation holes are provided on the surface of the ventilation plate, and a first air inlet hole, a second air inlet hole and a third air inlet hole are provided on the surface of the first partition plate from left to right in sequence, and the first air inlet hole, the second air inlet hole and the third air inlet hole are respectively connected with the first item storage sub-space, the second item storage sub-space and the third item storage sub-space, and are respectively connected with the first ventilation sub-space, the second ventilation sub-space and the third ventilation sub-space, one end of the second rotating shaft and the third rotating shaft on the first rotating assembly are both installed in the bearing on the outer wall of the first connecting plate, there are two first connecting plates, and the two first connecting plates are respectively installed on both sides of the lower surface of the ventilation plate, and the other ends of the second rotating shaft and the third rotating shaft on the first rotating assembly respectively penetrate the sealed bearings on the outer walls on both sides of the refrigeration and fresh-keeping box body.

[0020] Preferably, the first article storage space adjustment plate and the second article storage space adjustment plate are respectively mounted on the second rotating shaft and the third rotating shaft on the second rotating assembly, a first threaded hole is provided on the upper part of the outer wall of the first article storage space adjustment plate and the second article storage space adjustment plate, an external thread is provided on the outer wall of the second rotating shaft and the third rotating shaft on the second rotating assembly, the first threaded hole on the first article storage space adjustment plate and the external thread on the outer wall of the second rotating shaft on the first rotating assembly are threadedly matched, and the first threaded hole on the second article storage space adjustment plate and the external thread on the outer wall of the third rotating shaft on the first rotating assembly are threadedly matched;

[0021] The top and bottom ends of the first article storage space adjustment plate and the second article storage space adjustment plate are both installed with first limiting blocks, the first limiting blocks on the top ends of the first article storage space adjustment plate and the second article storage space adjustment plate are installed in the second limiting groove on the lower surface of the first partition plate, the second limiting blocks on the bottom ends of the first article storage space adjustment plate and the second article storage space adjustment plate are installed in the third limiting groove on the upper surface of the second partition plate, the third limiting groove is arranged at the front and rear ends of the upper surface of the second partition plate, and the outer wall of the first limiting block and the groove wall of the second limiting groove and the groove wall of the third limiting groove are all clearance-matched;

[0022] The surface of the second partition is provided with a first air outlet hole, a second air outlet hole and a third air outlet hole from left to right, and the first air outlet hole, the second air outlet hole and the third air outlet hole are respectively connected with the first item storage space, the second item storage space and the third item storage space. One end of the second rotating shaft and the third rotating shaft on the first rotating assembly are both installed in the bearing on the outer wall of the second connecting plate. There are two second connecting plates, and the two second connecting plates are respectively installed on both sides of the lower surface of the first partition. The other ends of the second rotating shaft and the third rotating shaft on the first rotating assembly respectively pass through the sealed bearings on the outer walls on both sides of the refrigerated preservation box body.

[0023] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0024] 1. In the present invention, through the coordinated arrangement of a series of structures, the staff starts the driving mechanism and makes the driving mechanism drive the first item storage space adjustment plate or the second item storage space adjustment plate to move in the X-axis direction. When the first item storage space adjustment plate or the second item storage space adjustment plate moves in the X-axis direction, the size of the first item storage sub-space, the second item storage sub-space and the third item storage sub-space will be adjusted. Therefore, the present invention can adjust the size of each item storage space according to the amount of vegetables, meat and other foods transported, which is convenient for the staff to classify and preserve different amounts of vegetables, meat and other foods every day.

[0025] 2. In the present invention, through the coordinated arrangement of a series of structures, the staff starts the driving mechanism and makes the driving mechanism drive the first cold air volume adjusting plate or the second cold air volume adjusting plate to move in the X-axis direction. When the first cold air volume adjusting plate or the second cold air volume adjusting plate moves in the X-axis direction, the size of the first ventilation sub-space, the second ventilation sub-space and the third ventilation sub-space can be adjusted. The size of the first ventilation sub-space, the second ventilation sub-space and the third ventilation sub-space can be adjusted, so that the amount of cold air entering the first item storage sub-space, the second item storage sub-space and the third item storage sub-space can be adjusted, and the amount of cold air entering the first item storage sub-space, the second item storage sub-space and the third item storage sub-space can be adjusted, so that the temperature in the first item storage sub-space, the second item storage sub-space and the third item storage sub-space can be adjusted. Therefore, the present invention can adjust the temperature of each item storage space according to the temperature at which the transported vegetables, meat and other foods are stored for freshness, thereby avoiding the situation where some foods such as the transported vegetables, meat and other foods are spoiled and damaged due to the same storage freshness temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 It is a cross-sectional view of the present invention as a whole.

[0028] Figure 2 It is a schematic structural diagram of the first article storage space adjustment plate and the second article storage space adjustment plate of the present invention.

[0029] Figure 3 It is a schematic structural diagram of the first cold air volume regulating plate and the second cold air volume regulating plate of the present invention.

[0030] Figure 4 The structure of the ventilation plate of the present invention is schematically shown in FIG. Figure 1 .

[0031] Figure 5 The structure of the ventilation plate of the present invention is schematically shown in FIG. Figure 2 .

[0032] Figure 6 The structure of the first partition of the present invention is schematically shown in FIG. Figure 1 .

[0033] Figure 7 The structure of the first partition of the present invention is schematically shown in FIG. Figure 2 .

[0034] Figure 8 The structure of the second partition of the present invention is schematically shown in FIG. Figure 1 .

[0035] Fig. 9 The structure of the second partition of the present invention is schematically shown in FIG. Figure 2 .

[0036] Fig.10 It is a structural schematic diagram of the driving mechanism of the present invention.

[0037] Fig.11 It is a cross-sectional view of the first belt transmission assembly, the second belt transmission assembly, the third belt transmission assembly and the fourth belt transmission assembly of the present invention.

[0038] Fig.12 The present invention Fig.11 Schematic diagram of the local enlarged structure at A in the figure.

[0039] Fig.13 It is a schematic diagram of the partial connection structure between the first rotating component and the second rotating component of the present invention.

[0040] Fig.14 The present invention Fig.13 Schematic diagram of the local enlarged structure at point B in the figure.

[0041] Fig.15 It is a schematic diagram of the overall structure of the present invention.

[0042] In the figure:

[0043] 100, refrigerated fresh-keeping box; 110, mounting frame; 120, exhaust duct; 130, ventilation plate; 131, first connecting plate; 132, ventilation hole; 133, first limiting groove; 140, first partition; 141, first air inlet; 142, second limiting groove; 143, second air inlet; 144, third air inlet; 145, second connecting plate; 150, second partition; 151, first air outlet; 152, third limiting groove; 153, second air outlet; 154, third air outlet; 160, cold air delivery pipe; 170, sealing door;

[0044] 200, driving mechanism; 210, stepping motor; 220, first rotating shaft; 230, first belt transmission assembly; 240, second belt transmission assembly; 250, third belt transmission assembly; 260, fourth belt transmission assembly; 270, first rotating assembly; 280, second rotating assembly;

[0045] 231, hollow pulley; 2311, annular protrusion; 2312, first groove; 232, transmission wheel; 2321, annular mounting groove; 2322, second groove; 233, first electromagnet; 234, first slider; 2341, first iron block; 2342, second iron block; 235, second electromagnet;

[0046] 271, second rotating shaft; 2711, third groove; 2712, fourth limiting groove; 272, third rotating shaft; 2721, fourth groove; 2722, fifth limiting groove; 273, third electromagnet; 274, second sliding block; 2741, third iron block; 2742, fourth iron block; 2743, third limiting block; 275, fourth electromagnet;

[0047] 300, first cold air volume adjustment plate; 310, second limit block; 320, second threaded hole;

[0048] 400, second cold air volume adjustment plate;

[0049] 500, first article storage space adjustment plate; 510, first limit block; 520, first threaded hole;

[0050] 600. Second article storage space adjustment plate. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0052] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] like Figure 1-15 As shown, a layered fresh-keeping device for cold chain logistics includes a refrigerated fresh-keeping box 100, wherein a ventilation plate 130 for ventilating a total storage space for articles and a first partition 140 and a second partition 150 for partitioning the internal cavity of the refrigerated fresh-keeping box 100 are installed inside the refrigerated fresh-keeping box 100, and the cavity between the first partition 140 and the second partition 150 forms the total storage space for articles, and a first article storage space adjustment plate 500 and a second article storage space adjustment plate 600 for dividing the total storage space for articles into three article storage sub-spaces and adjusting the sizes of the three article storage sub-spaces are arranged between the first partition 140 and the second partition 150, and the first article storage space adjustment plate 500 is located on one side of the second article storage space adjustment plate 600;

[0055] The cavity between the ventilation plate 130 and the first partition plate 140 forms a total ventilation space, and a first cold air volume regulating plate 300 and a second cold air volume regulating plate 400 are provided in the total ventilation space for dividing the total ventilation space into three ventilation sub-spaces and adjusting the sizes of the three ventilation sub-spaces, and the first cold air volume regulating plate 300 is located on one side of the second cold air volume regulating plate 400;

[0056] The refrigeration and fresh-keeping box 100 is provided with a driving mechanism 200 for driving the first cold air volume adjustment plate 300, the second cold air volume adjustment plate 400, the first article storage space adjustment plate 500 and the second article storage space adjustment plate 600 to perform linear motion in the X-axis direction.

[0057] The ventilation plate 130, the first partition plate 140 and the second partition plate 150 are sequentially arranged inside the refrigerated fresh-keeping box 100 from top to bottom. A cold air delivery pipe 160 is arranged above the ventilation plate 130. The other end of the cold air delivery pipe 160 passes through the outer wall of one side of the refrigerated fresh-keeping box 100 and extends to the outside. A sealing ring is arranged at the connection between the cold air delivery pipe 160 and the refrigerated fresh-keeping box 100. The sealing ring can seal the connection between the cold air delivery pipe 160 and the refrigerated fresh-keeping box 100, and an outlet is provided at the bottom of the circumferential outer wall of the cold air delivery pipe 160. The cold air outside is transported to the cold air transport pipe 160, and the cold air in the cold air transport pipe 160 will be discharged from the air outlet and flow into the three ventilation sub-spaces through the ventilation plate 130. An exhaust duct 120 is arranged under the outer wall of one side of the refrigerated preservation box 100. The exhaust duct 120 can discharge the cold air in the exhaust space to the outside. The cavity between the second partition plate 150 and the inner bottom end of the refrigerated preservation box 100 forms an exhaust space, and the interior of the exhaust duct 120 is connected to the exhaust space. A sealing door 170 is arranged on the front end wall of the refrigerated preservation box 100.

[0058] The cavity between one side outer wall of the first item storage space adjustment plate 500 and one side inner wall of the refrigerated preservation box body 100 forms a first item storage sub-space, the cavity between the other side outer wall of the first item storage space adjustment plate 500 and one side outer wall of the second item storage space adjustment plate 600 forms a second item storage sub-space, and the cavity between the other side outer wall of the second item storage space adjustment plate 600 and the other side inner wall of the refrigerated preservation box body 100 forms a third item storage sub-space. The first item storage sub-space, the second item storage sub-space and the third item storage sub-space can store different amounts of vegetables, meat and other foods for freshness preservation.

[0059] The cavity between one side outer wall of the first cold air volume adjustment plate 300 and one side inner wall of the refrigerated fresh-keeping box 100 forms a first ventilation sub-space, the cavity between the other side outer wall of the first cold air volume adjustment plate 300 and one side outer wall of the second cold air volume adjustment plate 400 forms a second ventilation sub-space, and the cavity between the other side outer wall of the second cold air volume adjustment plate 400 and the other side inner wall of the refrigerated fresh-keeping box 100 forms a third ventilation sub-space. The size of the first ventilation sub-space, the second ventilation sub-space and the third ventilation sub-space can be adjusted to adjust the amount of cold air entering the first item storage sub-space, the second item storage sub-space and the third item storage sub-space, thereby adjusting the temperature of the first item storage sub-space, the second item storage sub-space and the third item storage sub-space.

[0060] A stepper motor 210 is provided on the driving mechanism 200, and the stepper motor 210 is installed on the mounting frame 110, and the mounting frame 110 is installed on one side outer wall of the refrigerated and fresh-keeping box body 100, the output shaft on the stepper motor 210 is connected to the first rotating shaft 220 through a coupling, and the other end of the first rotating shaft 220 is installed in a sealed bearing on one side outer wall of the refrigerated and fresh-keeping box body 100, and the second belt transmission assembly 240 and the first belt transmission assembly 230 are provided on the outer wall of the first rotating shaft 220, and the second belt transmission assembly 240 is located on one side of the first belt transmission assembly 230, the first belt transmission assembly 230 is connected to the third belt transmission assembly 250 through a transmission belt, and the third belt transmission assembly 250 is installed on one end of the first rotating assembly 270, the second belt transmission assembly 240 is connected to the fourth belt transmission assembly 260 through a transmission belt, and the fourth belt transmission assembly 260 is installed on one end of the second rotating assembly 280.

[0061] The first belt transmission assembly 230, the second belt transmission assembly 240, the third belt transmission assembly 250 and the fourth belt transmission assembly 260 are all provided with a hollow pulley 231, a transmission wheel 232 is installed on the inner side of the hollow pulley 231, an annular protrusion 2311 is installed on the circumferential inner wall of the hollow pulley 231, the other end of the annular protrusion 2311 is installed in the annular installation groove 2321, and the annular installation groove 2321 is opened on the circumferential outer wall of the transmission wheel 232;

[0062] A first groove 2312 is provided on the circumferential inner wall of the annular protrusion 2311, and there are four first grooves 2312, which are distributed in an annular array, and a first electromagnet 233 is installed on the inner wall of one end of the first groove 2312. A second groove 2322 is provided on the circumferential inner wall of the annular mounting groove 2321, and there are four second grooves 2322, which are distributed in an annular array, and a second electromagnet 235 is installed on the inner wall of one end of the second groove 2322. A first slider 234 is provided in the second groove 2322, and there is a clearance fit between the outer wall of the first slider 234 and the groove wall of the second groove 2322, and a first iron block 2341 and a second iron block 2342 are respectively installed on the end walls of the two ends of the first slider 234. Since there is a clearance fit between the outer wall of the first slider 234 and the groove wall of the second groove 2322, the movement of the first slider 234 can be limited and guided.

[0063] The first rotating assembly 270 and the second rotating assembly 280 are both provided with a second rotating shaft 271 and a third rotating shaft 272, and the second rotating shaft 271 is located on one side of the third rotating shaft 272, a third groove 2711 is provided at the center of the end wall of one end of the second rotating shaft 271, and a fourth electromagnet 275 is installed on the inner wall of one end of the third groove 2711, a second slider 274 is provided inside the third groove 2711, and a clearance fit is formed between the outer wall of the second slider 274 and the groove wall of the third groove 2711, and a third iron block 2741 and a fourth iron block 2742 are installed at both ends of the second slider 274 respectively;

[0064] A third limiting block 2743 is installed on the circumferential outer wall of the second sliding block 274, and the other end of the third limiting block 2743 is installed in the fourth limiting groove 2712. The fourth limiting groove 2712 is arranged on the circumferential inner wall of the third groove 2711 on the ground. There is a clearance fit between the outer wall of the third limiting block 2743 and the groove wall of the fourth limiting groove 2712. There are four third limiting blocks 2743 and four fourth limiting grooves 2712, and the four third limiting blocks 2743 and the four fourth limiting grooves 2712 are distributed in a ring array. A fourth groove 2721 is opened at the center position of the end wall at one end of the third rotating shaft 272, and a third electromagnet 273 is installed on the inner wall of one end of the fourth groove 2721, and a fifth limiting is opened on the circumferential inner wall of the fourth groove 2721. The fifth limiting groove 2722 is four, and the four fifth limiting grooves 2722 are distributed in a ring array, the groove width and groove depth of the fifth limiting groove 2722 are equal to the groove width and groove depth of the fourth limiting groove 2712, because the outer wall of the third limiting block 2743 and the groove wall of the fourth limiting groove 2712 are clearance matched, and the outer wall of the second slider 274 and the groove wall of the third groove 2711 are clearance matched, so that the movement of the second slider 274 can be limited and guided. When the staff adjusts the size of the first item storage space, the second item storage space and the third item storage space, the staff controls whether the first electromagnet 233 or the second electromagnet 235 is energized so that the first electromagnet 233 or the second electromagnet 235 is energized. 5 is magnetic to control the connection relationship between the hollow pulley 231 and the transmission wheel 232. When the staff energizes the first electromagnet 233 and makes the first electromagnet 233 magnetic, and the second electromagnet 235 is not energized and has no magnetism, the first electromagnet 233 will absorb the first iron block 2341 on the first slider 234. When the first electromagnet 233 and the first iron block 2341 are magnetically connected, a part of the first slider 234 itself will move into the first groove 2312. At this time, the hollow pulley 231 and the transmission wheel 232 are in a connected state. When the staff energizes the second electromagnet 235 and makes the second electromagnet 235 magnetic, and the first electromagnet 233 is not energized and has no magnetism, the second electromagnet 235 is not energized and has no magnetism. The iron 235 will absorb the second iron block 2342 on the first slider 234. When the second electromagnet 235 is magnetically connected to the second iron block 2342, the first slider 234 itself will move into the second groove 2322. At this time, the hollow pulley 231 and the transmission wheel 232 are not connected. When the staff controls the connection relationship between the second rotating shaft 271 and the third rotating shaft 272 on the first rotating component 270 or the second rotating component 280, the staff energizes the third electromagnet 273 and makes it magnetic. When the fourth electromagnet 275 is not energized and has no magnetism, the third electromagnet 273 will absorb the fourth iron block 2742 on the second slider 274. When the third electromagnet 273 is magnetically connected to the fourth iron block 2742,A part of the second slider 274 itself will move into the fourth groove 2721. At this time, the second shaft 271 and the third shaft 272 are in a connected state. When the staff energizes the fourth electromagnet 275 and it has magnetism, and the third electromagnet 273 is not energized and has no magnetism, the fourth electromagnet 275 will absorb the third iron block 2741 on the second slider 274. When the fourth electromagnet 275 and the third iron block 2741 are magnetically connected, the second slider 274 itself will move into the third groove 2711. At this time, the second shaft 271 and the third shaft 272 are not connected, so that the staff can control the second rotating component 28 0 rotates, the second rotating shaft 271 on the second rotating assembly 280 rotates, the first article storage space adjustment plate 500 makes a linear motion on the outer wall of the second rotating shaft 271, the third rotating shaft 272 on the second rotating assembly 280 rotates, the second article storage space adjustment plate 600 makes a linear motion on the outer wall of the third rotating shaft 272, and the first article storage space adjustment plate 500 or the second article storage space adjustment plate 600 moves in the X-axis direction to adjust the size of the first article storage sub-space, the second article storage sub-space and the third article storage sub-space.

[0065] The first cold air volume regulating plate 300 and the second cold air volume regulating plate 400 are respectively mounted on the second rotating shaft 271 and the third rotating shaft 272 on the first rotating assembly 270, and a second threaded hole 320 is provided on the upper part of the outer wall of the first cold air volume regulating plate 300 and the second cold air volume regulating plate 400, and an external thread is provided on the outer wall of the second rotating shaft 271 and the third rotating shaft 272 on the first rotating assembly 270, and the second threaded hole 320 on the first cold air volume regulating plate 300 and the external thread on the outer wall of the second rotating shaft 271 on the first rotating assembly 270 are threadedly matched, and the second threaded hole 320 on the second cold air volume regulating plate 400 and the external thread on the outer wall of the third rotating shaft 272 on the first rotating assembly 270 are threadedly matched. The staff controls the first belt The connection state between the transmission component 230 and the third belt transmission component 250 and the connection state between the second rotating shaft 271 and the third rotating shaft 272 on the first rotating component 270 are used to control the second rotating shaft 271 or the third rotating shaft 272 on the first rotating component 270 to rotate. When the second rotating shaft 271 on the first rotating component 270 rotates, the first cold air volume adjustment plate 300 will make a linear motion on the second rotating shaft 271. When the third rotating shaft 272 on the first rotating component 270 rotates, the second cold air volume adjustment plate 400 will make a linear motion on the third rotating shaft 272. When the first cold air volume adjustment plate 300 or the second cold air volume adjustment plate 400 moves in the X-axis direction, the size of the first ventilation sub-space, the second ventilation sub-space and the third ventilation sub-space will be adjusted;

[0066] The first cold air volume regulating plate 300 and the second cold air volume regulating plate 400 are both installed with second limiting blocks 310 at the top and bottom. The second limiting blocks 310 on the top of the first cold air volume regulating plate 300 and the second cold air volume regulating plate 400 are installed in the first limiting groove 133. The first limiting groove 133 is arranged at the front and rear ends of the lower surface of the ventilation plate 130. The second limiting blocks 310 on the bottom ends of the first cold air volume regulating plate 300 and the second cold air volume regulating plate 400 are installed on the first limiting groove 133 on the upper surface of the first partition plate 140. In the second limiting groove 142, the second limiting groove 142 is provided at the front and rear ends of the two side surfaces of the first partition plate 140, and the outer wall of the second limiting block 310 and the groove wall of the first limiting groove 133 and the groove wall of the second limiting groove 142 are all clearance-matched. Since the outer wall of the second limiting block 310 and the groove wall of the first limiting groove 133 and the groove wall of the second limiting groove 142 are all clearance-matched, the movement of the first cold air volume adjustment plate 300 and the second cold air volume adjustment plate 400 can be limited and guided;

[0067] The surface of the ventilation plate 130 is provided with ventilation holes 132, and the surface of the first partition plate 140 is provided with a first air inlet hole 141, a second air inlet hole 143 and a third air inlet hole 144 from left to right, and the first air inlet hole 141, the second air inlet hole 143 and the third air inlet hole 144 are respectively connected with the first item storage sub-space, the second item storage sub-space and the third item storage sub-space, and are respectively connected with the first ventilation sub-space, the second ventilation sub-space and the third ventilation sub-space, and one end of the second rotating shaft 271 and the third rotating shaft 272 on the first rotating assembly 270 are both mounted on the outer wall of the first connecting plate 131. There are two first connecting plates 131 in the bearing on the ventilation plate 130, and the two first connecting plates 131 are respectively installed on both sides of the lower surface of the ventilation plate 130, and the other ends of the second rotating shaft 271 and the third rotating shaft 272 on the first rotating assembly 270 respectively penetrate the sealed bearings on the outer walls of both sides of the refrigerated preservation box body 100, and the cold air in the first ventilation sub-space will enter the first item storage sub-space from the first air inlet hole 141, the cold air in the second ventilation sub-space will enter the second item storage sub-space from the second air inlet hole 143, and the cold air in the third ventilation sub-space will enter the third item storage sub-space from the third air inlet hole 144.

[0068] The first article storage space adjustment plate 500 and the second article storage space adjustment plate 600 are respectively mounted on the second rotating shaft 271 and the third rotating shaft 272 on the second rotating assembly 280, and first threaded holes 520 are provided on the upper parts of the outer walls of the first article storage space adjustment plate 500 and the second article storage space adjustment plate 600, and external threads are provided on the outer walls of the second rotating shaft 271 and the third rotating shaft 272 on the second rotating assembly 280, and the first threaded hole 520 on the first article storage space adjustment plate 500 and the external threads on the outer wall of the second rotating shaft 271 on the first rotating assembly 270 are threadedly matched, and the first threaded hole 520 on the second article storage space adjustment plate 600 and the external threads on the outer wall of the third rotating shaft 272 on the first rotating assembly 270 are threadedly matched;

[0069] The first limiting blocks 510 are installed at the top and bottom of the first article storage space adjustment plate 500 and the second article storage space adjustment plate 600. The first limiting blocks 510 on the top of the first article storage space adjustment plate 500 and the second article storage space adjustment plate 600 are installed in the second limiting groove 142 on the lower surface of the first partition 140, and the second limiting blocks 310 on the bottom of the first article storage space adjustment plate 500 and the second article storage space adjustment plate 600 are installed in the second limiting groove 142 on the upper surface of the second partition 150. Among the three limiting grooves 152, the third limiting groove 152 is provided at the front and rear ends of the upper surface of the second partition plate 150, and the outer wall of the first limiting block 510 and the groove wall of the second limiting groove 142 and the groove wall of the third limiting groove 152 are all clearance-matched. Since the outer wall of the first limiting block 510 and the groove wall of the second limiting groove 142 and the groove wall of the third limiting groove 152 are all clearance-matched, the movement of the first article storage space adjustment plate 500 and the second article storage space adjustment plate 600 can be limited and guided;

[0070] The surface of the second partition plate 150 is provided with a first air outlet 151, a second air outlet 153 and a third air outlet 154 from left to right, and the first air outlet 151, the second air outlet 153 and the third air outlet 154 are respectively connected to the first item storage sub-space, the second item storage sub-space and the third item storage sub-space. One end of the second rotating shaft 271 and the third rotating shaft 272 on the first rotating assembly 270 are both installed in the bearing on the outer wall of the second connecting plate 145. The second connecting plate 145 is two, and the two second connecting plates are connected. The plates 145 are respectively installed on both sides of the lower surface of the first partition 140, and the other ends of the second rotating shaft 271 and the third rotating shaft 272 on the first rotating assembly 270 respectively penetrate the sealed bearings on the outer walls of both sides of the refrigerated preservation box 100. The cold air in the first item storage space will flow into the exhaust space through the first air outlet 151, the cold air in the second item storage space will flow into the exhaust space through the second air outlet 153, and the cold air in the third item storage space will flow into the exhaust space through the third air outlet 154.

[0071] When in use, the external power supply is turned on. When the staff performs fresh-keeping storage of different amounts of vegetables, meat and other foods, the staff starts the driving mechanism 200 and causes the driving mechanism 200 to drive the first item storage space adjustment plate 500 or the second item storage space adjustment plate 600 to move in the X-axis direction. When the first item storage space adjustment plate 500 or the second item storage space adjustment plate 600 moves in the X-axis direction, the size of the first item storage sub-space, the second item storage sub-space and the third item storage sub-space will be adjusted. Therefore, the present invention can adjust the size of each item storage space according to the amount of vegetables, meat and other foods transported, which is convenient for the staff to classify and preserve different amounts of vegetables, meat and other foods every day. When the staff needs to adjust the temperature in the first item storage sub-space, the second item storage sub-space and the third item storage sub-space, the staff starts the driving mechanism 200 and causes the driving mechanism 200 to drive the first cold air volume adjustment plate 500 to adjust the temperature of the first cold air volume adjustment plate 500 and the second cold air volume adjustment plate 6 ... The plate 300 or the second cold air volume regulating plate 400 moves in the X-axis direction. When the first cold air volume regulating plate 300 or the second cold air volume regulating plate 400 moves in the X-axis direction, the size of the first ventilation sub-space, the second ventilation sub-space and the third ventilation sub-space can be adjusted. The size of the first ventilation sub-space, the second ventilation sub-space and the third ventilation sub-space can be adjusted, so that the amount of cold air entering the first item storage sub-space, the second item storage sub-space and the third item storage sub-space can be adjusted, and the amount of cold air entering the first item storage sub-space, the second item storage sub-space and the third item storage sub-space can be adjusted, so that the temperature in the first item storage sub-space, the second item storage sub-space and the third item storage sub-space can be adjusted. Therefore, the present invention can adjust the temperature of each item storage space according to the temperature at which the transported vegetables, meat and other foods are stored for freshness, thereby avoiding the situation where some foods such as the transported vegetables, meat and other foods are spoiled and damaged due to the same storage freshness temperature.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A layered fresh-keeping device for cold chain logistics, comprising a refrigerated fresh-keeping box (100), characterized in that: The interior of the refrigerated fresh-keeping box (100) is provided with a ventilation plate (130) for ventilating the total article storage space, and a first partition (140) and a second partition (150) for partitioning the internal cavity of the refrigerated fresh-keeping box (100), and the cavity between the first partition (140) and the second partition (150) forms the total article storage space, and a first article storage space adjustment plate (500) and a second article storage space adjustment plate (600) for partitioning the total article storage space into three article storage sub-spaces and being able to adjust the sizes of the three article storage sub-spaces are provided between the first partition (140) and the second partition (150), and the first article storage space adjustment plate (500) is located on one side of the second article storage space adjustment plate (600); The cavity between the ventilation plate (130) and the first partition plate (140) forms a total ventilation space, and a first cold air volume adjustment plate (300) and a second cold air volume adjustment plate (400) are provided in the total ventilation space for dividing the total ventilation space into three ventilation sub-spaces and for adjusting the sizes of the three ventilation sub-spaces, and the first cold air volume adjustment plate (300) is located on one side of the second cold air volume adjustment plate (400); The refrigerated fresh-keeping box (100) is provided with a driving mechanism (200) for driving a first cold air volume adjustment plate (300), a second cold air volume adjustment plate (400), a first article storage space adjustment plate (500) and a second article storage space adjustment plate (600) to perform linear motion in the X-axis direction.

2. The layered fresh-keeping device for cold chain logistics according to claim 1, characterized in that: The ventilation plate (130), the first partition plate (140) and the second partition plate (150) are sequentially arranged inside the refrigerated fresh-keeping box (100) from top to bottom. A cold air delivery pipe (160) is arranged above the ventilation plate (130). The other end of the cold air delivery pipe (160) penetrates through an outer wall of one side of the refrigerated fresh-keeping box (100) and extends to the outside. The connection between the cold air delivery pipe (160) and the refrigerated fresh-keeping box (100) is provided. A sealing ring is provided, and an air outlet is provided at the bottom of the circumferential outer wall of the cold air delivery pipe (160); an exhaust pipe (120) is provided below the outer wall of one side of the refrigerated fresh-keeping box (100); an exhaust space is formed by a cavity between the second partition plate (150) and the inner bottom end of the refrigerated fresh-keeping box (100); and the interior of the exhaust pipe (120) is connected to the exhaust space; and a sealing door (170) is provided on the front end wall of the refrigerated fresh-keeping box (100).

3. The layered fresh-keeping device for cold chain logistics according to claim 1, characterized in that: The cavity between one side outer wall of the first item storage space adjustment plate (500) and one side inner wall of the refrigerated fresh-keeping box (100) forms a first item storage sub-space, the cavity between the other side outer wall of the first item storage space adjustment plate (500) and one side outer wall of the second item storage space adjustment plate (600) forms a second item storage sub-space, and the cavity between the other side outer wall of the second item storage space adjustment plate (600) and the other side inner wall of the refrigerated fresh-keeping box (100) forms a third item storage sub-space.

4. The layered fresh-keeping device for cold chain logistics according to claim 1, characterized in that: The cavity between the outer wall on one side of the first cold air volume regulating plate (300) and the inner wall on one side of the refrigerated fresh-keeping box (100) forms a first ventilation sub-space, the cavity between the outer wall on the other side of the first cold air volume regulating plate (300) and the outer wall on one side of the second cold air volume regulating plate (400) forms a second ventilation sub-space, and the cavity between the outer wall on the other side of the second cold air volume regulating plate (400) and the inner wall on the other side of the refrigerated fresh-keeping box (100) forms a third ventilation sub-space.

5. The layered fresh-keeping device for cold chain logistics according to claim 1, characterized in that: The driving mechanism (200) is provided with a stepper motor (210), the stepper motor (210) is mounted on a mounting frame (110), and the mounting frame (110) is mounted on an outer wall of a side of the refrigeration and fresh-keeping box (100), the output shaft of the stepper motor (210) is connected to a first rotating shaft (220) through a coupling, the other end of the first rotating shaft (220) is mounted in a sealed bearing on an outer wall of a side of the refrigeration and fresh-keeping box (100), and a second belt transmission assembly (240) and a first belt transmission assembly (240) are arranged on the outer wall of the first rotating shaft (220). The invention relates to a transmission component (230), and the second belt transmission component (240) is located on one side of the first belt transmission component (230), the first belt transmission component (230) is connected to the third belt transmission component (250) through a transmission belt, and the third belt transmission component (250) is installed on one end of the first rotating component (270), the second belt transmission component (240) is connected to the fourth belt transmission component (260) through a transmission belt, and the fourth belt transmission component (260) is installed on one end of the second rotating component (280).

6. The layered fresh-keeping device for cold chain logistics according to claim 5, characterized in that: The first belt transmission assembly (230), the second belt transmission assembly (240), the third belt transmission assembly (250) and the fourth belt transmission assembly (260) are all provided with a hollow pulley (231), a transmission wheel (232) is installed on the inner side of the hollow pulley (231), an annular protrusion (2311) is installed on the circumferential inner wall of the hollow pulley (231), the other end of the annular protrusion (2311) is installed in an annular installation groove (2321), and the annular installation groove (2321) is opened on the circumferential outer wall of the transmission wheel (232); A first groove (2312) is provided on the circumferential inner wall of the annular protrusion (2311), and there are four first grooves (2312) which are distributed in an annular array, and a first electromagnet (233) is installed on the inner wall of one end of the first groove (2312). A second groove (2322) is provided on the circumferential inner wall of the annular installation groove (2321), and there are four second grooves (2322) which are distributed in an annular array, and a second electromagnet (235) is installed on the inner wall of one end of the second groove (2322). A first slider (234) is arranged in the second groove (2322), and there is a clearance fit between the outer wall of the first slider (234) and the groove wall of the second groove (2322), and a first iron block (2341) and a second iron block (2342) are respectively installed on the end walls at both ends of the first slider (234).

7. The layered fresh-keeping device for cold chain logistics according to claim 6, characterized in that: The first rotating assembly (270) and the second rotating assembly (280) are both provided with a second rotating shaft (271) and a third rotating shaft (272), and the second rotating shaft (271) is located on one side of the third rotating shaft (272), a third groove (2711) is provided at the center of the end wall of one end of the second rotating shaft (271), and a fourth electromagnet (275) is installed on the inner wall of one end of the third groove (2711), a second slider (274) is provided inside the third groove (2711), and a clearance fit is formed between the outer wall of the second slider (274) and the groove wall of the third groove (2711), and a third iron block (2741) and a fourth iron block (2742) are respectively installed at both ends of the second slider (274); A third limiting block (2743) is installed on the circumferential outer wall of the second sliding block (274), and the other end of the third limiting block (2743) is installed in the fourth limiting groove (2712). The fourth limiting groove (2712) is arranged on the circumferential inner wall of the third groove (2711) on the ground. There is a clearance fit between the outer wall of the third limiting block (2743) and the groove wall of the fourth limiting groove (2712). There are four third limiting blocks (2743) and four fourth limiting grooves (2712), and the four third limiting blocks (2743) and the four fourth limiting grooves (2712) are arranged on the circumferential inner wall of the third groove (2711) on the ground. 712) are distributed in a ring array, a fourth groove (2721) is provided at the center of the end wall at one end of the third rotating shaft (272), and a third electromagnet (273) is installed on the inner wall of one end of the fourth groove (2721), a fifth limiting groove (2722) is provided on the circumferential inner wall of the fourth groove (2721), there are four fifth limiting grooves (2722), and the four fifth limiting grooves (2722) are distributed in a ring array, and the groove width and groove depth of the fifth limiting groove (2722) are equal to the groove width and groove depth of the fourth limiting groove (2712).

8. The layered fresh-keeping device for cold chain logistics according to claim 1, characterized in that: The first cold air volume regulating plate (300) and the second cold air volume regulating plate (400) are respectively mounted on the second rotating shaft (271) and the third rotating shaft (272) on the first rotating assembly (270); a second threaded hole (320) is provided on the upper part of the outer wall of the first cold air volume regulating plate (300) and the second cold air volume regulating plate (400); external threads are provided on the outer walls of the second rotating shaft (271) and the third rotating shaft (272) on the first rotating assembly (270); the second threaded hole (320) on the first cold air volume regulating plate (300) and the external threads on the outer wall of the second rotating shaft (271) on the first rotating assembly (270) are threadedly matched; and the second threaded hole (320) on the second cold air volume regulating plate (400) and the external threads on the outer wall of the third rotating shaft (272) on the first rotating assembly (270) are threadedly matched; The top and bottom ends of the first cold air volume regulating plate (300) and the second cold air volume regulating plate (400) are both installed with second limiting blocks (310); the second limiting blocks (310) on the top ends of the first cold air volume regulating plate (300) and the second cold air volume regulating plate (400) are installed in the first limiting groove (133); the first limiting groove (133) is arranged at the front and rear ends of the lower surface of the ventilation plate (130); the second limiting blocks (310) on the bottom ends of the first cold air volume regulating plate (300) and the second cold air volume regulating plate (400) are installed in the second limiting groove (142) on the upper surface of the first partition (140); the second limiting groove (142) is arranged at the front and rear ends of the two side surfaces of the first partition (140); and the outer wall of the second limiting block (310) and the groove wall of the first limiting groove (133) and the groove wall of the second limiting groove (142) are all clearance-fitted; The surface of the ventilation plate (130) is provided with ventilation holes (132); the surface of the first partition plate (140) is provided with a first air inlet hole (141), a second air inlet hole (143) and a third air inlet hole (144) in sequence from left to right; and the first air inlet hole (141), the second air inlet hole (143) and the third air inlet hole (144) are respectively connected to the first article storage sub-space, the second article storage sub-space and the third article storage sub-space, and are respectively connected to the first ventilation sub-space, the second ventilation sub-space and the third ventilation sub-space. The two first connecting plates (131) are connected to each other, one end of the second rotating shaft (271) and the third rotating shaft (272) on the first rotating assembly (270) are both mounted in the bearings on the outer wall of the first connecting plate (131), there are two first connecting plates (131), the two first connecting plates (131) are respectively mounted on both sides of the lower surface of the ventilation plate (130), and the other ends of the second rotating shaft (271) and the third rotating shaft (272) on the first rotating assembly (270) respectively penetrate the sealed bearings on the outer walls on both sides of the refrigeration and fresh-keeping box body (100).

9. The layered fresh-keeping device for cold chain logistics according to claim 1, characterized in that: The first article storage space adjustment plate (500) and the second article storage space adjustment plate (600) are respectively mounted on the second rotating shaft (271) and the third rotating shaft (272) on the second rotating assembly (280); a first threaded hole (520) is provided on the upper part of the outer wall of the first article storage space adjustment plate (500) and the second article storage space adjustment plate (600); external threads are provided on the outer walls of the second rotating shaft (271) and the third rotating shaft (272) on the second rotating assembly (280); the first threaded hole (520) on the first article storage space adjustment plate (500) and the external threads on the outer wall of the second rotating shaft (271) on the first rotating assembly (270) are threadedly matched, and the first threaded hole (520) on the second article storage space adjustment plate (600) and the external threads on the outer wall of the third rotating shaft (272) on the first rotating assembly (270) are threadedly matched; The top and bottom ends of the first article storage space adjustment plate (500) and the second article storage space adjustment plate (600) are both installed with first limiting blocks (510); the first limiting blocks (510) on the top ends of the first article storage space adjustment plate (500) and the second article storage space adjustment plate (600) are installed in the second limiting groove (142) on the lower surface of the first partition plate (140); the second limiting blocks (310) on the bottom ends of the first article storage space adjustment plate (500) and the second article storage space adjustment plate (600) are installed in the third limiting groove (152) on the upper surface of the second partition plate (150); the third limiting groove (152) is arranged at the front and rear ends of the upper surface of the second partition plate (150); and the outer wall of the first limiting block (510) and the groove wall of the second limiting groove (142) and the groove wall of the third limiting groove (152) are all clearance-matched; The surface of the second partition (150) is provided with a first air outlet hole (151), a second air outlet hole (153) and a third air outlet hole (154) from left to right, and the first air outlet hole (151), the second air outlet hole (153) and the third air outlet hole (154) are respectively connected to the first item storage space, the second item storage space and the third item storage space. One end of the second rotating shaft (271) and the third rotating shaft (272) on the first rotating component (270) are both installed in the bearing on the outer wall of the second connecting plate (145). There are two second connecting plates (145), and the two second connecting plates (145) are respectively installed on both sides of the lower surface of the first partition (140), and the other ends of the second rotating shaft (271) and the third rotating shaft (272) on the first rotating component (270) respectively pass through the sealed bearings on the outer walls of the two sides of the refrigeration and fresh-keeping box (100).

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