A cold-chain logistics temperature control turnover box
By combining semiconductor cooling chips and dry ice placement slots in the cold chain logistics turnover box, the problems of poor temperature control and insufficient stability are solved, achieving long-term heat preservation and stable stacking, thus meeting the high-quality development requirements of cold chain logistics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAMEN CITY UNIV XIAMEN RADIO & TV UNIV
- Filing Date
- 2026-04-16
- Publication Date
- 2026-06-16
AI Technical Summary
Existing cold chain logistics turnover boxes suffer from poor temperature control, are prone to tipping over during transportation and stacking, and lack stability, making it difficult to meet the high-quality development requirements of modern cold chain logistics.
A temperature-controlled turnover box for cold chain logistics was designed, which adopts a structure combining a semiconductor cooling chip and a dry ice placement slot. The dry ice is isolated from the internal space of the box by a heat-conducting partition. The semiconductor cooling chip absorbs heat to extend the heat preservation time, and the locking mechanism improves the stacking stability, so as to achieve the replenishment and reliable locking of dry ice.
It effectively extends the insulation time, improves stacking stability, ensures the safety of goods and the accuracy of temperature control, and meets the high-quality requirements of modern cold chain logistics.
Smart Images
Figure CN122211698A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cold chain logistics technology, specifically to a temperature-controlled turnover box for cold chain logistics. Background Technology
[0002] With the expansion and rapid development of fresh food e-commerce, biomedicine, and ready-to-eat meals into mass consumer categories, the demand for cold chain logistics continues to surge. Traditional cold chain packaging mainly uses disposable foam boxes, which have prominent problems such as short insulation time, poor environmental performance, and inability to be recycled and reused. This not only causes serious waste of resources and environmental burden, but also makes it difficult to meet the high-quality development requirements of modern cold chain logistics.
[0003] While reusable logistics containers can address the environmental concerns of disposable packaging, they still generally suffer from defects such as poor temperature control, easy tipping during transportation and stacking, and insufficient stability, which directly affect cargo safety and temperature control accuracy.
[0004] In view of this, the inventor conducted in-depth research on the aforementioned deficiencies in the prior art, which led to the creation of this case. Summary of the Invention
[0005] The main objective of this invention is to provide a temperature-controlled turnover box for cold chain logistics, which features excellent heat preservation performance, convenient replenishment of dry ice, and improved stacking stability.
[0006] To achieve the above objectives, the solution of the present invention is:
[0007] A temperature-controlled turnover box for cold chain logistics includes a box body and a box lid. The top of the box body has a recess for placing the box lid, and the box lid is detachably disposed in the recess. The inner walls of the front and rear sides of the box are respectively provided with a first cavity and a second cavity. The first cavity is separated from the inner cavity of the box by a first heat-conducting baffle, and the second cavity is separated from the inner cavity of the box by a second heat-conducting baffle. The first cavity has an outwardly opening flip cover, and a dry ice placement slot is provided inside the flip cover. An exhaust valve is also provided on the flip cover. The second cavity is equipped with a semiconductor refrigeration chip and a battery, and the cooling surface of the semiconductor refrigeration chip is in contact with the second thermally conductive partition. The box is provided with a handle on its side, and a first locking mechanism that is linked to the handle is provided at the bottom of the box. A second locking mechanism is provided at the top of the box. When the boxes are stacked, the first locking mechanism in the upper box is connected to the second locking mechanism in the lower box. When the upper box is lifted by the handle, the first locking mechanism and the second locking mechanism are separated.
[0008] Furthermore, the dry ice placement groove of the flip cover is provided with a slope facing the first heat-conducting partition, and the dry ice bag abuts against the first heat-conducting partition along the slope under the action of gravity.
[0009] Furthermore, the flip-top cover is made of the same insulating material as the box body, and the lower end of the flip-top cover is hinged to the box body.
[0010] Furthermore, two sealing rings, inner and outer, are provided between the lid and the edge of the recessed groove at the top of the box body. The connection between the lid and the box body forms an air extraction chamber between the two sealing rings, and the air extraction chamber is connected to an air extraction nozzle located on the box body.
[0011] Furthermore, a recessed cavity is provided on the side of the box body. The first locking mechanism includes a swing rod, a vertical rod, a first sleeve, a first spring, a limiting seat, and a locking slide sleeve. The middle part of the swing rod is rotatably connected to the recessed cavity of the box body. One end of the swing rod is connected to the handle, and the other end of the swing rod is provided with a sliding groove. A mounting cavity is provided at the bottom of the box body. A through hole for the vertical rod to pass through is provided between the top of the mounting cavity and the recessed cavity. The vertical rod passes through the through hole from the bottom. A cylindrical sliding column perpendicular to the vertical rod is provided at the upper end of the vertical rod. The cylindrical sliding column slides in the sliding groove. The first sleeve is fixedly installed in the mounting cavity, and the locking sleeve is sleeved on the outside of the vertical rod and slidably connected to the inner wall of the first sleeve; the upper and lower ends of the first spring are respectively connected to the top of the inner cavity of the first sleeve and the top of the locking sleeve; the limiting seat is slidably connected to the outer wall of the locking sleeve, and the limiting seat is also threadedly connected to the lower part of the inner cavity of the first sleeve to limit the maximum downward movement of the locking sleeve; the lower side wall of the locking sleeve is provided with an annular locking groove.
[0012] Furthermore, the cylindrical sliding column extends from both sides of the vertical rod, and the swing rod is provided with two parallel sliding grooves, and the cylindrical sliding column is slidably and rotatably connected to the two sliding grooves.
[0013] Furthermore, the second locking mechanism includes a second sleeve, a second spring, a connecting seat, a stop plate, several swing claws, and several connecting arms; the bottom of the housing is provided with a mounting hole, the second sleeve is fixedly installed in the mounting hole, and the connecting seat is fixedly connected to the bottom of the second sleeve; the roots of the swing claws are rotatably connected to the outer periphery of the connecting seat at equal intervals, and the lower middle part of each swing claw is connected to a connecting arm; the stop plate is located within the space enclosed by the swing claws above the connecting seat, and the outer periphery of the stop plate is connected to the connecting arm. Rotary connection; the second spring is disposed between the base and the abutment; the swing claw is provided with a hook facing inward for connecting the locking groove, and the hook has a guide slope for the vertical rod and the locking sleeve to abut from top to bottom; when the abutment is pressed down and moves, the connecting arm drives the swing claw to open outward; a tension spring is connected to the swing rod on the handle side, the upper end of the tension spring is connected to the swing rod, and the lower end of the tension spring is connected to the bottom of the cavity of the box, so that the vertical rod retracts into the first sleeve after the handle is released.
[0014] Furthermore, each box has two sets of first locking mechanisms at its bottom and two sets of second locking mechanisms at its top; the two second locking mechanisms are located symmetrically at the center of the box.
[0015] Furthermore, a cover is provided at the opening of the cavity, and the cover has an opening for the handle connection to pass through; a connector is provided at the connection between the handle and the swing rod, the connector is rotatably connected to the pivot on the swing rod, and the connector is rotatably connected to the handle; the rotation axis of the connector rotatably connected to the swing rod is perpendicular to the rotation axis of the connector rotatably connected to the handle.
[0016] Furthermore, a connecting shaft is provided through the handle, and the handle is rotatably connected to the connector through the connecting shaft; a slot is provided on the connector, and a retaining ring is provided in the slot, and the retaining ring engages with the rotating shaft on the swing rod to limit the axial position of the connector and the rotating shaft.
[0017] With the above structure, the cold chain logistics temperature-controlled turnover box of the present invention has at least the following beneficial effects: 1. A dry ice storage compartment is installed on the outside of the cabinet, allowing for timely replenishment of dry ice without opening the cabinet. The entire internal volume of the cabinet can be used to store cold chain goods. The dry ice storage compartment is isolated from the internal space of the cabinet and heat transfer is achieved through a first thermally conductive partition. Gases generated by the sublimation of dry ice are discharged to the outside through an exhaust valve. Furthermore, the flip-top cover itself is made of insulating material to isolate the dry ice in the storage compartment from the outside environment. A semiconductor cooling chip absorbs heat from the inside of the cabinet through a second thermally conductive partition, extending the insulation time and allowing control of the semiconductor cooling chip's operating time to regulate the temperature inside the cabinet.
[0018] Second, the stacked turnover boxes form a reliable lock between the upper and lower layers, significantly improving stacking stability. When the box is lifted by the handle, the first locking mechanism and the second locking mechanism naturally separate. Specifically, lifting the handle causes the swing rod to rotate and press down on the vertical rod. The lower end of the vertical rod presses down on the abutment, thereby opening the swing claw outward and releasing it from the locking groove. When the turnover boxes are stacked, during the falling process, the locking sleeve presses down against the guide slope, thereby opening the swing claw so that the hook claw forms the locking groove. When the turnover box is placed on the ground, the ground abuts against the locking sleeve, and the locking sleeve retracts into the first sleeve against the elastic force of the first spring. In this way, the locking sleeve and the vertical rod will not affect the stable placement of the turnover box on the ground.
[0019] Compared with existing technologies, this invention effectively extends the heat preservation time by incorporating a semiconductor cooling chip and a dry ice storage tank for replenishment. Furthermore, the first locking mechanism in the upper chamber is connected to the second locking mechanism in the lower chamber, ensuring stability when the turnover boxes are stacked. Attached Figure Description
[0020] Figure 1 This invention relates to a three-dimensional structural diagram of a temperature-controlled turnover box for cold chain logistics after stacking.
[0021] Figure 2 and Figure 3 This is a schematic diagram of the three-dimensional structure of the stacked turnover boxes from two other angles.
[0022] Figure 4 This is a cross-sectional view of the first and second cavities of the turnover box.
[0023] Figure 5 This is a cross-sectional view of the first and second locking mechanisms of the stacked turnover boxes.
[0024] Figure 6 This is a three-dimensional structural diagram of the first locking mechanism and the second locking mechanism.
[0025] Figure 7 This is a schematic diagram of the exploded structure of the first locking mechanism.
[0026] Figure 8 for Figure 7 A magnified structural diagram of point A in the middle.
[0027] Figure 9 This is a cross-sectional view showing the changes in the opening and closing states of the swing claw of the second locking mechanism.
[0028] Figure 10 A three-dimensional structural diagram of stacked turnover boxes placed on the ground (covers are hidden).
[0029] Figure 11 This is a schematic diagram of a three-dimensional partial cross-sectional view of stacked turnover boxes placed on the ground.
[0030] Figure 12 This is a partial cross-sectional view of the structure in which the swing claw engages with the locking groove on the locking sleeve before the vertical rod is pressed down.
[0031] Figure 13 A partial cross-sectional view of the upper and lower turnover boxes in preparation for lifting the upper box.
[0032] Figure 14 This is a partial cross-sectional view of the structure when the vertical rod moves from top to bottom and just touches the abutment piece.
[0033] Figure 15 This is a partial cross-sectional view of the structure when the vertical rod moves from top to bottom and presses down on the abutment, causing the swinging claw to open.
[0034] Figure 16 This is a partial cross-sectional view of the upper housing after it rises and the locking sleeve disengages from the swing claw.
[0035] Figure 17 for Figure 4 A magnified structural diagram at point B in the middle.
[0036] In the picture: Box body 1; First cavity 11; Flip-top cover 111; Dry ice placement slot 112; Ramp 113; Exhaust valve 114; First thermally conductive baffle 12; Second cavity 13; Semiconductor cooling chip 131; Battery 132; Protective plate 133; Second thermally conductive baffle 14; Recess 15; Cover 151; Window 152; Mounting cavity 16; Mounting hole 17; Handle 18; Connecting shaft 181; Connector 182; Slot 183; Snap ring 184; Box cover 2; Sealing ring 2 1; Air extraction chamber 22; First locking mechanism 3; Swing rod 31; Tension spring 311; Slide groove 312; Rotating shaft 313; Vertical rod 32; Cylindrical slide column 321; First sleeve 33; First spring 34; Limiting seat 35; Locking slide sleeve 36; Locking groove 361; Annular edge 362; Second locking mechanism 4; Second sleeve 41; Second spring 42; Connecting seat 43; Abutment 44; Swing claw 45; Hook claw 451; Guide slope 452; Connecting arm 46. Detailed Implementation
[0037] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.
[0038] like Figures 1 to 17 As shown, this invention relates to a temperature-controlled turnover box for cold chain logistics, which includes a box body 1 and a box cover 2. The top of the box body 1 has a recess for placing the box cover 2, and the box cover 2 is detachably disposed in the recess. The inner walls of the front and rear sides of the housing 1 are respectively provided with a first cavity 11 and a second cavity 13. The first cavity 11 is separated from the inner cavity of the housing 1 by a first heat-conducting partition 12, and the second cavity 13 is separated from the inner cavity of the housing 1 by a second heat-conducting partition 14. The first cavity 11 has an outwardly opening flip cover 111, and a dry ice placement slot 112 is provided inside the flip cover 111. An exhaust valve 114 is also provided on the flip cover 111. The second cavity 13 is provided with a semiconductor cooling chip 131 and a battery 132. The cooling surface of the semiconductor cooling chip 131 is in contact with the second heat-conducting partition 14.
[0039] Thus, the present invention relates to a temperature-controlled turnover box for cold chain logistics. A dry ice storage slot 112 is provided on the outside of the box body 1, allowing for timely replenishment of dry ice without opening the box. The entire internal volume of the box body 1 can be used to store cold chain goods. The dry ice storage slot 112 is isolated from the internal space of the box and heat transfer is achieved through a first thermally conductive partition 12. Gas generated by the sublimation of dry ice is discharged to the outside through an exhaust valve. Furthermore, the flip-top cover 111 itself is made of insulating material, isolating the dry ice in the dry ice storage slot 112 from the outside environment. A semiconductor cooling chip 131 absorbs heat from the box body 1 through a second thermally conductive partition 14, extending the heat preservation time. The working time of the semiconductor cooling chip 131 can also be controlled to regulate the temperature inside the box body 1. A removable protective plate 133 is also provided inside the second cavity 13, covering the battery 132. A controller (not shown in the figure) is also connected between the battery 132 and the semiconductor cooling chip 131. A temperature sensor (not shown in the figure) is also provided inside the box body 1, and the temperature sensor is connected to the controller.
[0040] Preferably, the dry ice placement groove 112 of the flip cover 111 is provided with a slope 113 facing the first heat-conducting partition 12, and the dry ice bag abuts against the first heat-conducting partition 12 along the slope 113 under the action of gravity. Furthermore, the flip cover 111 is made of the same heat-insulating material as the box body 1, and the lower end of the flip cover 111 is hinged to the box body 1.
[0041] Preferably, two sealing rings 21 are provided between the lid 2 and the edge of the recessed groove at the top of the box body 1. An air extraction chamber 22 is formed between the two sealing rings 21 at the connection between the lid 2 and the box body 1. The air extraction chamber 22 is connected to an air extraction nozzle (not shown in the figure) located on the box body 1. Air extraction is performed at the joint between the lid 2 and the box body 1, generating negative pressure within the air extraction chamber 22. This strengthens the connection between the lid 2 and the box body 1 and effectively isolates heat conduction, significantly improving the insulation and sealing performance. An air inlet (not shown in the figure) communicating with the air extraction chamber 22 is also provided on the box body 1. When it is necessary to open the lid 2, outside air is drawn in by opening the air inlet, thus opening the lid 2. Preferably, adhesive tape can also be used to bond the lid 2 and the outer surface of the box body 1 to prevent the lid 2 from being accidentally opened midway.
[0042] Preferably, a handle 18 is provided on the side of the box 1, a first locking mechanism 3 is provided at the bottom of the box 1 in conjunction with the handle 18, and a second locking mechanism 4 is provided at the top of the box 1. When the boxes 1 are stacked, the first locking mechanism 3 in the upper box 1 is connected to the second locking mechanism 4 in the lower box 1. When the upper box 1 is lifted by the handle 18, the first locking mechanism 3 and the second locking mechanism 4 separate. A reliable lock is formed between the upper and lower layers of the stacked turnover boxes, greatly improving the stacking stability. When the box 1 is lifted by the handle 18, the first locking mechanism 3 and the second locking mechanism 4 naturally separate.
[0043] Preferably, a recessed cavity 15 is provided on the side of the box body 1. The first locking mechanism 3 includes a swing rod 31, a vertical rod 32, a first sleeve 33, a first spring 34, a limiting seat 35, and a locking slide sleeve 36. The middle part of the swing rod 31 is rotatably connected to the recessed cavity 15 of the box body 1. One end of the swing rod 31 is connected to the handle 18, and the other end of the swing rod 31 is provided with a sliding groove 312. A mounting cavity 16 is provided at the bottom of the box body 1. A through hole for the vertical rod 32 to pass through is provided between the top of the mounting cavity 16 and the recessed cavity 15. The vertical rod 32 passes through the through hole from below. A cylindrical sliding column 321 perpendicular to the vertical rod 32 is provided at the upper end of the vertical rod 32. The cylindrical sliding column 321 slides in the sliding groove 312. The first sleeve 33 is fixedly installed in the mounting cavity 16, and the locking sleeve 36 is sleeved on the outside of the vertical rod 32 and slidably connected to the inner wall of the first sleeve 33; the upper and lower ends of the first spring 34 are respectively connected to the top of the inner cavity of the first sleeve 33 and the top of the locking sleeve 36; the limiting seat 35 is slidably connected to the outer wall of the locking sleeve 36, and the limiting seat 35 is also threadedly connected to the lower part of the inner cavity of the first sleeve 33 to limit the maximum downward movement of the locking sleeve 36; the lower side wall of the locking sleeve 36 is provided with an annular locking groove 361.
[0044] Furthermore, the cylindrical sliding column 321 extends from both sides of the vertical rod 32, and the swing rod 31 is provided with two parallel sliding grooves 312, and the cylindrical sliding column 321 is slidably and rotatably connected to the two sliding grooves 312.
[0045] Preferably, the second locking mechanism 4 includes a second sleeve 41, a second spring 42, a connecting seat 43, a stop plate 44, a plurality of swing claws 45, and a plurality of connecting arms 46; the bottom of the housing 1 is provided with a mounting hole 17, the second sleeve 41 is fixedly installed in the mounting hole 17, and the connecting seat 43 is fixedly connected to the bottom of the second sleeve 41; the roots of the swing claws 45 are rotatably connected to the outer periphery of the connecting seat 43 at equal intervals, and the lower middle part of each swing claw 45 is connected to a connecting arm 46; the stop plate 44 is located within the space enclosed by the swing claws 45 above the connecting seat 43, and the outer periphery of the stop plate 44 is connected to the connecting arm 46. Rotary connection; the second spring 42 is disposed between the base and the abutment 44; the swing claw 45 is provided with a hook 451 facing inward for connecting the locking groove 361, and the hook 451 has a guide slope 452 for the vertical rod 32 and the locking sleeve 36 to abut from top to bottom; when the abutment 44 is pressed down and moves, the connecting arm 46 drives the swing claw 45 to open outward; furthermore, when the second spring 42 returns to its free length, the outermost of each guide slope 452 on the swing claw 45 is larger than the lower outer diameter of the locking sleeve 36, so that the swing claw 45 can be opened when the vertical rod 32 and the locking sleeve 36 are pressed down.
[0046] A tension spring 311 is connected to the swing rod 31 on one side of the handle 18. The upper end of the tension spring 311 is connected to the swing rod 31, and the lower end of the tension spring 311 is connected to the bottom of the cavity 15 of the box body 1, so that the vertical rod 32 retracts into the first sleeve 33 after the handle 18 is released.
[0047] When the turnover boxes are stacked, during the descent, the locking sleeve 36 presses downward against the guide ramp 452, thereby opening the swing claw 45 so that the hook 451 forms the locking groove 361. When the turnover boxes are placed on the ground, the ground abuts against the locking sleeve 36, and the locking sleeve 36 retracts into the first sleeve 33 against the elastic force of the first spring 34. In this way, the locking sleeve 36 and the vertical rod 32 will not affect the stable placement of the turnover boxes on the ground.
[0048] like Figure 12 As shown, after stacking, the swing claw 45 engages with the locking groove 361 on the locking sleeve 36. At this time, the annular edge 362 at the upper end of the locking sleeve 36 abuts against the limiting seat 35, and the locking groove 361 on the outer wall of the locking sleeve 36 is just in the position to engage with the hook 451 of the swing claw 45.
[0049] When the upper cabinet 1 needs to be removed, the user lifts the handle 18. In the initial stage of lifting the handle upwards, this causes the swing lever 31 to rotate and press down the vertical lever 32; see also Figure 14 The lower end of the vertical rod 32 presses down on the abutment 44, thereby opening the swing claw 45 outward and releasing it from the locking groove 361. See also Figure 15 After the swing claw 45 is released, the vertical rod 32 still presses against the abutment 44. At this time, continue to lift the handle 18 as shown to detach the upper box 1 from the lower box 1 (see...). Figure 16 ).
[0050] Furthermore, each box 1 has two sets of first locking mechanisms 3 at its bottom and two sets of second locking mechanisms 4 correspondingly at its top; the two second locking mechanisms 4 are located symmetrically at the center of the box 1. In this way, the first locking mechanism 3 and the second locking mechanism 4 can be connected even when the box 1 is rotated 180 degrees horizontally.
[0051] Preferably, a cover 151 is provided at the opening of the cavity 15, and the cover 151 has a window 152 for the handle 18 to pass through. A connector 182 is provided at the connection between the handle 18 and the swing rod 31. The connector 182 is rotatably connected to the pivot 313 on the swing rod 31, and the connector 182 is rotatably connected to the handle 18. The rotation axis of the connector 182 rotatably connected to the swing rod 31 is perpendicular to the rotation axis of the connector 182 rotatably connected to the handle 18. In this way, when the handle 18 is not in use, the handle 18 naturally falls and is located in the cavity 15. The cover 151 serves to cover the swing rod 31 and the vertical rod 32, preventing external objects from affecting their normal operation.
[0052] Specifically, a connecting shaft 181 passes through the handle 18, and the handle 18 is rotatably connected to the connecting member 182 via the connecting shaft 181. The connecting member 182 is provided with a slot 183, and a retaining ring 184 passes through the slot 183. The retaining ring 184 engages with the rotating shaft 313 on the swing rod 31 to restrict the axial position of the connecting member 182 and the rotating shaft 313. Through the connection of the slot 183, the retaining ring 184, and the connecting member 182, the connection between the handle 18 and the swing rod 31 is simple and secure.
[0053] Compared with the prior art, the present invention can effectively extend the heat preservation time by setting a semiconductor cooling chip 131 and a dry ice placement tank 112 that can be replenished with dry ice. In addition, the first locking mechanism 3 in the upper box 1 is connected to the second locking mechanism 4 in the lower box 1, so that the turnover boxes can remain stable after being stacked.
[0054] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.
Claims
1. A temperature-controlled turnover box for cold chain logistics, characterized in that, It includes a box body and a box lid, wherein the top of the box body has a recess for placing the box lid, and the box lid is detachably disposed in the recess; The inner walls of the front and rear sides of the box are respectively provided with a first cavity and a second cavity. The first cavity is separated from the inner cavity of the box by a first heat-conducting baffle, and the second cavity is separated from the inner cavity of the box by a second heat-conducting baffle. The first cavity has an outwardly opening flip cover, and a dry ice placement slot is provided inside the flip cover. An exhaust valve is also provided on the flip cover. The second cavity is equipped with a semiconductor refrigeration chip and a battery, and the cooling surface of the semiconductor refrigeration chip is in contact with the second thermally conductive partition. The box is provided with a handle on its side, and a first locking mechanism that is linked to the handle is provided at the bottom of the box. A second locking mechanism is provided at the top of the box. When the boxes are stacked, the first locking mechanism in the upper box is connected to the second locking mechanism in the lower box. When the upper box is lifted by the handle, the first locking mechanism and the second locking mechanism are separated.
2. The cold chain logistics temperature-controlled turnover box as described in claim 1, characterized in that, The flip-top has a slope in the dry ice placement slot facing the first heat-conducting partition, and the dry ice bag abuts against the first heat-conducting partition along the slope under the action of gravity.
3. A temperature-controlled turnover box for cold chain logistics as described in claim 1, characterized in that, The flip-top cover is made of the same insulation material as the box body, and the lower end of the flip-top cover is hinged to the box body.
4. A temperature-controlled turnover box for cold chain logistics as described in claim 1, characterized in that, Two sealing rings, inner and outer, are provided between the lid and the edge of the recessed groove on the top of the box body. The connection between the lid and the box body forms an air extraction chamber between the two sealing rings. The air extraction chamber is connected to an air extraction nozzle located on the box body.
5. A temperature-controlled turnover box for cold chain logistics as described in any one of claims 1-4, characterized in that, The side of the box body is provided with a recessed cavity. The first locking mechanism includes a swing rod, a vertical rod, a first sleeve, a first spring, a limiting seat, and a locking slide sleeve. The middle part of the swing rod is rotatably connected to the recessed cavity of the box body. One end of the swing rod is connected to the handle, and the other end of the swing rod is provided with a sliding groove. The bottom of the box body is provided with a mounting cavity. A through hole for the vertical rod to pass through is provided between the top of the mounting cavity and the recessed cavity. The vertical rod passes through the through hole from the bottom. A cylindrical sliding column perpendicular to the vertical rod is provided at the upper end of the vertical rod. The cylindrical sliding column slides in the sliding groove. The first sleeve is fixedly installed in the mounting cavity, and the locking sleeve is sleeved on the outside of the vertical rod and slidably connected to the inner wall of the first sleeve; the upper and lower ends of the first spring are respectively connected to the top of the inner cavity of the first sleeve and the top of the locking sleeve; the limiting seat is slidably connected to the outer wall of the locking sleeve, and the limiting seat is also threadedly connected to the lower part of the inner cavity of the first sleeve to limit the maximum downward movement of the locking sleeve; the lower side wall of the locking sleeve is provided with an annular locking groove.
6. A temperature-controlled turnover box for cold chain logistics as described in claim 5, characterized in that, The cylindrical sliding column extends from both sides of the vertical rod, and the swing rod is provided with two parallel sliding grooves. The cylindrical sliding column is slidably and rotatably connected to the two sliding grooves.
7. A temperature-controlled turnover box for cold chain logistics as described in claim 5, characterized in that, The second locking mechanism includes a second sleeve, a second spring, a connecting seat, a stop plate, several swing claws, and several connecting arms. The bottom of the housing has a mounting hole, and the second sleeve is fixedly installed in the mounting hole. The connecting seat is fixedly connected to the bottom of the second sleeve. The roots of the swing claws are rotatably connected to the outer periphery of the connecting seat at equal intervals. A connecting arm is connected to the lower middle part of each swing claw. The stop plate is located within the space enclosed by the swing claws above the connecting seat, and the outer periphery of the stop plate rotates with the connecting arm. The connection is as follows: the second spring is disposed between the base and the abutment; the swing claw is provided with a hook claw facing inward for connecting the locking groove, and the hook claw has a guide slope for the vertical rod and the locking sleeve to abut from top to bottom; when the abutment is pressed and moves downward, the connecting arm drives the swing claw to open outward; a tension spring is connected to the swing rod on the handle side, the upper end of the tension spring is connected to the swing rod, and the lower end of the tension spring is connected to the bottom of the cavity of the box body, so that the vertical rod retracts into the first sleeve after the handle is released.
8. A temperature-controlled turnover box for cold chain logistics as described in claim 7, characterized in that, Two sets of first locking mechanisms are provided at the bottom of each box, and two sets of second locking mechanisms are provided at the top of each box; the two second locking mechanisms are located symmetrically at the center of the box.
9. A temperature-controlled turnover box for cold chain logistics as described in claim 7, characterized in that, A cover is provided at the opening of the cavity, and the cover has an opening for the handle connection to pass through; a connector is provided at the connection between the handle and the swing rod, the connector is rotatably connected to the pivot on the swing rod, and the connector is rotatably connected to the handle; the rotation axis of the connector rotatably connected to the swing rod is perpendicular to the rotation axis of the connector rotatably connected to the handle.
10. A temperature-controlled turnover box for cold chain logistics as described in claim 9, characterized in that, A connecting shaft is threaded through the handle, and the handle is rotatably connected to the connector through the connecting shaft; a slot is provided on the connector, and a retaining ring is threaded through the slot. The retaining ring engages with the rotating shaft on the swing rod to limit the axial position of the connector and the rotating shaft.