Cold chain transportation heat preservation container and heat preservation method

Abstract

The invention discloses a cold chain transportation heat preservation container and a heat preservation method. The heat preservation container comprises a storage container body, an active heat absorption refrigeration container body, a passive heat absorption refrigeration container body, a vacuum heat insulation container body, a ventilation cooling container body and an active refrigeration device. The passive heat absorption refrigeration box body comprises a passive refrigeration box body, a phase change cold storage mechanism and a passive refrigeration cavity; the heat preservation method comprises the steps that the storage box body and the phase change cold storage mechanism are kept in a solid state through the active refrigeration device, when the active refrigeration device breaks down and stops refrigeration, the temperature of the storage box body and the temperature of the phase change cold storage mechanism rise synchronously, and the phase change cold storage mechanism melts to absorb heat after reaching the phase change temperature and continuously absorbs heat to form cold source buffering; and after the active refrigeration device recovers refrigeration, the phase change cold storage mechanism is solidified again to complete cold storage, active and passive temperature control cooperation is achieved, and the temperature stability and the emergency guarantee capacity in the cold chain transportation process are improved.

Description

Technical Field

[0001] The present application relates to the field of cold chain transportation technology, and in particular to a cold chain transportation insulated cargo box and an insulation method. Background Art

[0002] Existing cold chain transportation systems usually rely on compressor refrigeration equipment to maintain a low temperature environment inside the cargo box, and achieve continuous cooling of the transported goods through the refrigerant cycle that absorbs and releases heat. However, during actual transportation, if the compressor malfunctions or fails, the entire refrigeration system will not be able to operate normally, resulting in the cargo box being unable to be effectively cooled. The maintenance or replacement of the compressor is often difficult to carry out in time during transportation, resulting in cold chain interruption, which can easily lead to problems such as deterioration and failure of goods, especially temperature-sensitive fresh food, vaccines, blood products, etc., seriously affecting the transportation stability and cargo safety of cold chain transportation. Summary of the Invention

[0003] In order to improve the temperature control failure problem and cargo deterioration defect caused by compressor failure in the existing cold chain transportation system, the present application provides a cold chain transportation insulated cargo box and an insulation method.

[0004] The present application provides a cold chain transport insulated cargo box and insulation method using the following technical solutions: A cold chain transport insulated cargo box, comprising a storage box, an active heat-absorbing refrigeration box sleeved outside the storage box, a passive heat-absorbing refrigeration box sleeved outside the active heat-absorbing refrigeration box, a vacuum insulation box sleeved outside the passive heat-absorbing refrigeration box, a ventilation and cooling box sleeved outside the vacuum insulation box, and an active refrigeration device connected to the outer wall of the ventilation and cooling box and inserted into the active heat-absorbing refrigeration box; The passive heat absorption refrigeration box includes a passive refrigeration box body, and a phase change cold storage mechanism connected to the inner side wall of the passive refrigeration box body and sleeved on the outer side wall of the active heat absorption refrigeration box body; the passive refrigeration box body and the active heat absorption refrigeration box are surrounded to form a passive refrigeration cavity, and the phase change cold storage mechanism is inserted into the passive refrigeration cavity and arranged in an array along the outer side wall of the active heat absorption refrigeration box body; the phase change cold storage mechanism is used to melt and absorb heat when the temperature rises.

[0005] By adopting the above technical solution, the active refrigeration device is used to quickly cool the storage box and the active heat-absorbing refrigeration box to ensure that the temperature inside the storage box drops and is maintained at a preset temperature, while keeping the phase-change cold storage mechanism in a solid state; when the active refrigeration device stops or the energy efficiency decreases, the phase-change cold storage mechanism will melt and absorb heat during the temperature rise stage, forming passive cooling, further ensuring the temperature stability of the storage box. The vacuum insulated box suppresses the conduction and convection of external heat through the vacuum layer, thereby improving the thermal insulation performance of the entire cargo box. The ventilation and cooling box is used to achieve rapid heat dissipation through air circulation and assist in regulating the temperature. This application ensures that the loss of cold in the insulated cargo box can be effectively prevented under different working conditions, thereby improving the temperature stability and cargo safety of cold chain transportation. The array setting of the phase-change cold storage mechanism in the multi-layer structure of this application can achieve large-area, continuous melting and heat absorption, and the active and passive refrigeration and insulation are clearly layered and complement each other, effectively improving the overall cold preservation capacity and emergency guarantee capability of the cargo box.

[0006] Preferably, the phase change cold storage mechanism includes a cold storage shell inserted in the passive refrigeration cavity and respectively connected to the passive refrigeration box body and the active heat absorption refrigeration box, a cold storage composite material component inserted in the cold storage shell, and an encapsulation layer sleeved on the outside of the cold storage composite material component and located between the cold storage shell and the cold storage composite material component.

[0007] By adopting the above technical solution, the cold storage composite material assembly adjusts the temperature of the passive refrigeration cavity and the storage box by absorbing or releasing latent heat when the ambient temperature changes. The encapsulation layer is used to effectively isolate the cold storage composite material assembly from direct contact with the external environment, prevent leakage and improve heat exchange efficiency; the cold storage shell realizes the positioning and protection of the cold storage composite material assembly, and the encapsulation layer ensures the stability of the cold storage composite material assembly and the safety of long-term recycling use. The cold storage composite material assembly quickly melts and absorbs heat in the temperature rising stage, and efficiently stores cold in the temperature decreasing stage, thereby realizing dynamic temperature regulation. This application not only improves the reliability of heat absorption and cooling, but also enhances the durability and thermal response capability of the phase change cold storage mechanism in extreme environments, effectively improving the cold storage efficiency and emergency temperature control capability of the entire cold chain transportation insulated cargo box.

[0008] Preferably, the cold storage composite material component is a paraffin-graphite composite material.

[0009] By adopting the above technical solution, the cold storage composite material component is a paraffin-graphite composite material, which is inserted into the cold storage shell. When the temperature of the passive refrigeration cavity rises, the paraffin part first absorbs heat and melts when the phase change temperature is reached. The high latent heat of the solid-liquid phase change process of the paraffin is used to effectively store the ambient heat. At the same time, the high thermal conductivity of graphite promotes the rapid and uniform distribution of heat in the entire cold storage composite material component, avoiding local overheating or slow heat absorption due to uneven heat conduction. As the temperature in the storage box and the passive refrigeration cavity continues to rise, the paraffin continues to melt and absorb heat, effectively delaying the temperature increase inside the storage box; when the ambient temperature drops, the paraffin solidifies and releases latent heat, further buffering the temperature change; the encapsulation layer effectively prevents leakage and external contamination of the paraffin-graphite composite material, improving structural safety and cycle life. This application not only achieves efficient storage and slow release of cold, but also improves the thermal response speed and overall thermal management level in the phase change cold storage process, ensuring that the cold chain transport insulated cargo box can achieve temperature stability and cargo safety under various temperature control conditions.

[0010] Preferably, the vacuum insulation box and the passive heat absorption refrigeration box are surrounded to form a vacuum cavity; The vacuum insulation box includes a vacuum box body, and connecting and fixing columns respectively connected to the vacuum box body and the passive refrigeration box body and inserted into the vacuum cavity; the connecting and fixing columns are arranged in an array along the outer side wall of the passive heat absorption refrigeration box.

[0011] By adopting the above technical solution, the connecting and fixing columns are used to support and connect the vacuum box body and the passive refrigeration box body, ensuring a stable connection and overall rigidity between the boxes; after the vacuum cavity is formed, the air in the vacuum cavity is evacuated, which can reduce the conduction and convection of heat through gas molecules, and improve the thermal insulation performance of the entire insulated cargo box. The connecting and fixing columns are arranged in an array to disperse and evenly bear the mechanical load between the boxes, prevent local deformation or structural instability, and further improve the ability of the vacuum cavity to maintain a vacuum state for a long time, thereby achieving heat insulation and cold preservation, reducing the impact of external temperature changes on the internal temperature of the storage box, and improving the safety of goods during cold chain transportation and the overall thermal insulation durability of the insulated cargo box.

[0012] Preferably, the active heat absorption refrigeration box and the storage box are surrounded to form an active refrigeration cavity; The active refrigeration device includes a compressor connected to the outer wall of the ventilation and cooling box, a condenser mechanism connected to the upper side wall of the compressor, an expansion valve mechanism arranged on the outer wall of the ventilation and cooling box and connected to the condenser mechanism, and an evaporator mechanism connected to the expansion valve mechanism and inserted into the active refrigeration cavity. The evaporator mechanism is sleeved on the outer wall of the storage box and arranged in an array.

[0013] By adopting the above technical solution, the compressor is used to compress the refrigerant, and the refrigerant is sent to the condenser mechanism to release heat and then converted into a high-pressure liquid, and then throttled and reduced in pressure by the expansion valve mechanism. The liquid refrigerant becomes a low-temperature and low-pressure state and enters the evaporator mechanism. The evaporator mechanism is distributed in an array along the outer wall of the storage box, which can fully cover the entire outer surface of the storage box and form a uniform cold source distribution in the active refrigeration cavity. At this time, the low-temperature refrigerant vaporizes and absorbs heat in the evaporator mechanism, and quickly absorbs heat from the surrounding storage box to achieve efficient cooling. This application not only ensures the rapid drop and uniform distribution of the internal temperature of the storage box, but also improves the heat exchange efficiency and reduces temperature dead corners through the arrayed evaporator mechanism layout, effectively enhancing the active cooling ability and temperature control accuracy of the cold chain transportation insulated cargo box.

[0014] Preferably, the ventilation and cooling box and the vacuum insulation box are arranged to form a ventilation and insulation cavity; The ventilation and cooling box includes a cargo box body that is sleeved on the outside of the vacuum insulation box body, an insulation board that is inserted into the ventilation and insulation cavity and connected to the cargo box body and the vacuum insulation box body respectively, and an active air supply mechanism that is connected to the cargo box body and is used to blow air into the ventilation and insulation cavity.

[0015] By adopting the above technical solution, the active air supply mechanism introduces external air into the ventilation and heat-insulating cavity in an orderly manner when working, and takes away the heat in the upper part of the ventilation and cooling box through air flow, thereby improving the heat dissipation efficiency of the outer shell above the cargo box, and the insulation board is arranged at the lower part of the ventilation and heat-insulating cavity to form an insulation barrier. This application reduces the impact of the external environment on the internal temperature of the box through a combination of layered ventilation and insulation, effectively delaying and inhibiting the transfer of heat from the outside of the box to the inside, thereby improving the insulation effect and cargo safety of the cold chain transportation insulated cargo box in a high temperature environment.

[0016] Preferably, the thermal insulation board is an aerogel board.

[0017] By adopting the above technical solution, the insulation board is made of aerogel board, which has low thermal conductivity and high thermal insulation performance, slowing down the heat penetration rate, and improving the overall insulation efficiency and adaptability of the insulated cargo box to the external thermal environment. Through the application of aerogel boards, not only the impact of the heat of the outer layer of the cargo box body on the inner layer is reduced, and the low temperature retention time is extended, but also the temperature safety guarantee capability of the goods in cold chain transportation and the energy-saving effect of the insulation system are effectively improved.

[0018] Preferably, the ventilation and heat-insulating cavity includes an insulation cavity located below the cargo box body and used for inserting the insulation board, and a ventilation cavity located above the cargo box body; one end of the cargo box body is provided with a passive air inlet hole connected to the ventilation cavity, and the other end of the cargo box body is provided with a passive air outlet hole connected to the ventilation cavity.

[0019] By adopting the above technical solution, the insulation board is inserted into the insulation cavity to form an efficient barrier to the heat below. The aerogel board suppresses the heat transfer of the lower layer with its low thermal conductivity, and the ventilation cavity above is naturally connected to the outside air through passive air inlet and passive air outlet, and passive air flow is achieved by temperature difference or wind pressure drive. When the external temperature is high or the ambient wind speed changes, the air enters the ventilation cavity through the passive air inlet, flows along the top of the box and is finally discharged from the passive air outlet, taking away part of the heat from the outer surface of the box during the flow, and assisting in cooling. This application has efficient heat insulation and low energy heat dissipation through the zoning coordination of the insulation board and the ventilation cavity, and the reasonable layout of the passive air inlet and passive air outlet, effectively delaying the transfer of heat to the inside of the cargo box, and improving the temperature control capability and cargo safety level of the cold chain transportation insulated cargo box in complex environments.

[0020] Preferably, the active air supply mechanism includes a solar panel assembly connected to the upper side wall of the cargo box body, a power storage assembly connected to the side wall of the cargo box body and electrically connected to the solar panel assembly, a fan ventilation assembly connected to the side wall of the cargo box body and electrically connected to the power storage assembly, and a temperature detection assembly inserted in the storage box body and electrically connected to the fan ventilation assembly; the fan ventilation assembly is located on one side of the passive air inlet and is connected to the ventilation cavity.

[0021] By adopting the above technical solution, the solar panel assembly converts solar energy into electrical energy and charges the energy storage assembly when there is light. The energy storage assembly provides a stable power supply for the fan ventilation assembly and the temperature detection assembly. When the temperature detection assembly detects that the temperature inside the storage box reaches the set threshold, the temperature detection assembly triggers the fan ventilation assembly to work, and sends external air into the ventilation cavity through the passive air inlet, so as to realize forced air circulation to take away the heat from the external surface of the box, improve the cooling efficiency, and at the same time, it can intelligently adjust the fan working state according to the real-time temperature inside the storage box, reduce energy consumption and improve temperature control accuracy. The active air supply mechanism of this application realizes green energy saving and intelligent temperature control of cold chain transportation insulated cargo boxes through the coordinated efficient air supply of solar panel assemblies, energy storage assemblies, temperature detection assemblies and fan ventilation assemblies, and effectively enhances the temperature regulation ability of the cargo box during long-term transportation or high-temperature environment.

[0022] A cold chain transportation insulation method, comprising the cold chain transportation insulation cargo box, further comprising the following steps: S1: The active refrigeration device cools the storage box to maintain a preset refrigeration temperature, and at the same time, the phase change cold storage mechanism maintains a preset temperature to maintain a solid state; S2: When the active refrigeration device fails and stops refrigeration, the temperature inside the storage box and the phase-change cold storage mechanism rises synchronously; S3: When the temperature of the phase-change cold storage mechanism rises to a preset phase-change temperature, the phase-change cold storage mechanism absorbs heat and melts, changing from solid to liquid; S4: The phase change cold storage mechanism continuously absorbs heat to maintain a constant temperature during the phase change period, thereby forming a cold source buffer zone; S5: When the phase change cold storage mechanism is completely melted, a temperature delay layer is formed to delay the temperature rise rate; S6: When the active refrigeration device resumes refrigeration, the phase-change cold storage mechanism cools down and solidifies into a solid state.

[0023] By adopting the above technical solution, the storage box and the phase-change cold storage mechanism are maintained in a solid state through an active refrigeration device. When the active refrigeration device fails and stops refrigerating, the temperature of the storage box and the phase-change cold storage mechanism rises synchronously. The phase-change cold storage mechanism melts and absorbs heat after reaching the phase change temperature, and continuously absorbs heat to form a cold source buffer, effectively delaying the temperature increase in the box. After the active refrigeration device resumes refrigeration, the phase-change cold storage mechanism re-solidifies to complete cold storage, realizing the coordination of active and passive temperature control, and improving the temperature stability and safety assurance capabilities during cold chain transportation.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. A cold chain transport insulated cargo box, an active refrigeration device is used to quickly cool the storage box and the active heat absorption refrigeration box to ensure that the temperature inside the storage box drops and is maintained at a preset temperature, while keeping the phase change cold storage mechanism in a solid state; when the active refrigeration device stops or the energy efficiency decreases, the phase change cold storage mechanism will melt and absorb heat during the temperature rise stage, forming passive cooling, further ensuring the temperature stability of the storage box, the vacuum insulation box suppresses the conduction and convection of external heat through the vacuum layer, and improves the thermal insulation performance of the entire cargo box, the ventilation and cooling box is used to achieve rapid heat dissipation through air circulation, and assists in regulating the temperature. The present application ensures that the loss of cold in the insulated cargo box can be effectively prevented under different working conditions, thereby improving the temperature stability and cargo safety of cold chain transportation. The array arrangement of the phase change cold storage mechanism in the multi-layer structure of the present application can realize large-area and continuous melting and heat absorption, and the active and passive refrigeration and thermal insulation are clearly layered and complement each other, effectively improving the overall cold preservation capacity and emergency guarantee capability of the cargo box; 2. A cold chain transport insulated cargo box, in which an insulation board is inserted into an insulation cavity to form an efficient barrier to the heat below. The aerogel board suppresses the heat transfer from the lower layer due to its low thermal conductivity, while the ventilation cavity above is naturally connected to the outside air through passive air inlet and passive air outlet holes, and passive air flow is achieved by temperature difference or wind pressure drive. When the external temperature is high or the ambient wind speed changes, air enters the ventilation cavity through the passive air inlet holes, flows along the top of the box and is finally discharged through the passive air outlet holes, taking away part of the heat from the outer surface of the box during the flow process, assisting in cooling. This application has efficient heat insulation and low energy dissipation through the zoning coordination of the insulation board and the ventilation cavity, as well as the reasonable layout of the passive air inlet and passive air outlet holes, effectively delaying the transfer of heat to the interior of the cargo box, thereby improving the temperature control capability and cargo safety level of the cold chain transport insulated cargo box in complex environments; 3. A cold chain transportation insulation method, which maintains the storage box and the phase change cold storage mechanism in a solid state through an active refrigeration device. When the active refrigeration device fails and stops refrigeration, the temperature of the storage box and the phase change cold storage mechanism rises synchronously. The phase change cold storage mechanism melts and absorbs heat after reaching the phase change temperature, and continuously absorbs heat to form a cold source buffer, effectively delaying the temperature increase in the box. After the active refrigeration device resumes refrigeration, the phase change cold storage mechanism re-solidifies to complete cold storage, realizing the coordination of active and passive temperature control, and improving the temperature stability and safety assurance capabilities during cold chain transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a cross-sectional view of an embodiment of a cold chain transport insulated cargo box of the present application. Figure 1 .

[0026] Figure 2 for Figure 1 Enlarged view of part A.

[0027] Figure 3 This is a cross-sectional view of an embodiment of a cold chain transport insulated cargo box of the present application. Figure 2 .

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of an embodiment of a cold chain transport insulated cargo box of the present application.

[0029] Figure 5 This is a schematic flow chart of the steps of an embodiment of a cold chain transportation insulation method of the present application.

[0030] Description of reference numerals: 1. Storage box; 2. Active heat absorption refrigeration box; 21. Active refrigeration cavity; 3. Passive heat absorption refrigeration box; 31. Passive refrigeration box body; 32. Phase change cold storage mechanism; 33. Passive refrigeration cavity; 321. Cold storage shell; 322. Cold storage composite material assembly; 323. Packaging layer; 4. Vacuum insulation box; 41. Vacuum cavity; 42. Vacuum box body; 43. Connecting and fixing column; 5. Ventilation and cooling box; 51. Ventilation insulation Thermal cavity; 52. Cargo box body; 53. Insulation board; 54. Active air supply mechanism; 511. Insulation cavity; 512. Ventilation cavity; 521. Passive air inlet; 522. Passive air outlet; 541. Solar panel assembly; 542. Power storage assembly; 543. Fan ventilation assembly; 544. Temperature detection assembly; 6. Active refrigeration device; 61. Compressor; 62. Condenser mechanism; 63. Expansion valve mechanism; 64. Evaporator mechanism. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1 to 5 This application is described in further detail.

[0032] The present application discloses a cold chain transport insulation box and insulation method. Figure 1 A cold chain transport insulated cargo box includes a storage box 1, an active heat absorption refrigeration box 2 sleeved on the outside of the storage box 1, a passive heat absorption refrigeration box 3 sleeved on the outside of the active heat absorption refrigeration box 2, a vacuum insulation box 4 sleeved on the outside of the passive heat absorption refrigeration box 3, a ventilation and cooling box 5 sleeved on the outside of the vacuum insulation box 4, and an active refrigeration device 6 connected to the outer wall of the ventilation and cooling box 5 and inserted into the active heat absorption refrigeration box 2; The passive heat absorption refrigeration box 3 includes a passive refrigeration box body 31, and a phase change cold storage mechanism 32 connected to the inner wall of the passive refrigeration box body 31 and sleeved on the outer wall of the active heat absorption refrigeration box 2; the passive refrigeration box body 31 and the active heat absorption refrigeration box 2 are surrounded to form a passive refrigeration cavity 33, and the phase change cold storage mechanism 32 is inserted into the passive refrigeration cavity 33 and arranged in an array along the outer wall of the active heat absorption refrigeration box 2; the phase change cold storage mechanism 32 is used to melt and absorb heat when the temperature rises.

[0033] The active refrigeration device 6 of the present application is used to quickly cool the storage box 1 and the active heat-absorbing refrigeration box 2 to ensure that the internal temperature of the storage box 1 drops and is maintained at a preset temperature, while keeping the phase-change cold storage mechanism 32 in a solid state; when the active refrigeration device 6 stops or the energy efficiency decreases, the phase-change cold storage mechanism 32 will melt and absorb heat during the temperature rise stage, forming passive cooling, further ensuring the temperature stability of the storage box 1, and the vacuum insulation box 4 suppresses the conduction and convection of external heat through the vacuum layer, thereby improving the thermal insulation performance of the entire cargo box. The ventilation and cooling box 5 is used to achieve rapid heat dissipation through air circulation and assist in regulating the temperature. The present application ensures that the loss of cold in the insulated cargo box can be effectively prevented under different working conditions, thereby improving the temperature stability and cargo safety of cold chain transportation. The array setting of the phase-change cold storage mechanism 32 in the multi-layer structure of the present application can achieve large-area, continuous melting and heat absorption, and the active and passive refrigeration and insulation are clearly layered and complement each other, effectively improving the overall cold preservation capacity and emergency guarantee capability of the cargo box.

[0034] Furthermore, if Figure 2 As shown, the phase change cold storage mechanism 32 includes a cold storage shell 321 inserted in the passive refrigeration cavity 33 and connected to the passive refrigeration box body 31 and the active heat absorption refrigeration box 2 respectively, a cold storage composite material component 322 inserted in the cold storage shell 321, and an encapsulation layer 323 that is sleeved on the outside of the cold storage composite material component 322 and located between the cold storage shell 321 and the cold storage composite material component 322.

[0035] The cold storage composite material component 322 of the present application adjusts the temperature of the passive refrigeration cavity 33 and the storage box 1 by absorbing or releasing latent heat when the ambient temperature changes. The encapsulation layer 323 is used to effectively isolate the cold storage composite material component 322 from direct contact with the external environment, prevent leakage and improve heat exchange efficiency; the cold storage shell 321 realizes the positioning and protection of the cold storage composite material component 322, and the encapsulation layer 323 ensures the stability of the cold storage composite material component 322 and the safety of long-term recycling use. The cold storage composite material component 322 quickly melts and absorbs heat in the temperature rising stage, and efficiently stores cold in the temperature dropping stage, thereby realizing dynamic temperature regulation. The present application not only improves the reliability of heat absorption and cooling, but also enhances the durability and thermal response capability of the phase change cold storage mechanism 32 in extreme environments, effectively improving the cold storage efficiency and emergency temperature control capability of the entire cold chain transportation insulated cargo box.

[0036] The cold storage shell 321 is preferably an aluminum shell, and the packaging layer 323 is preferably a multi-layer aluminum-plastic film vacuum bag.

[0037] Furthermore, if Figure 2 As shown, the cold storage composite material component 322 is a paraffin-graphite composite material.

[0038] The cold storage composite material assembly 322 of the present application is a paraffin-graphite composite material, which is inserted into the cold storage shell 321. When the temperature of the passive refrigeration cavity 33 rises, the paraffin portion first absorbs heat and melts when the phase change temperature is reached. The high latent heat of the solid-liquid phase change process of the paraffin is used to effectively store ambient heat. At the same time, the high thermal conductivity of graphite promotes the rapid and uniform distribution of heat throughout the cold storage composite material assembly 322, avoiding local overheating or slow heat absorption due to uneven heat conduction. As the temperature inside the storage box 1 and the passive refrigeration cavity 33 continues to rise, the paraffin continues to melt and absorb heat, effectively delaying the increase in the internal temperature of the storage box 1; when the ambient temperature drops, the paraffin solidifies and releases latent heat, further buffering the temperature change; the encapsulation layer 323 effectively prevents leakage and external contamination of the paraffin-graphite composite material, improving structural safety and cycle life. The present application not only achieves efficient storage and slow release of cold energy, but also improves the thermal response speed and overall thermal management level during the phase change cold storage process, ensuring that the cold chain transport insulated cargo box can achieve temperature stability and cargo safety under various temperature control conditions.

[0039] Specifically, if Figure 1 As shown, the vacuum insulation box 4 and the passive heat absorption refrigeration box 3 are surrounded to form a vacuum cavity 41; The vacuum insulation box body 4 includes a vacuum box body 42 and connecting and fixing columns 43 respectively connected to the vacuum box body 42 and the passive refrigeration box body 31 and inserted into the vacuum cavity 41; the connecting and fixing columns 43 are arranged in an array along the outer wall of the passive heat absorption refrigeration box body 3.

[0040] The connecting and fixing columns 43 of the present application are used to support and connect the vacuum box body 42 and the passive refrigeration box body 31, ensuring a stable connection and overall rigidity between the boxes; after the vacuum cavity 41 is formed, the air in the vacuum cavity 41 is evacuated, which can reduce the conduction and convection of heat through gas molecules, and improve the thermal insulation performance of the entire insulated cargo box. The connecting and fixing columns 43 are arranged in an array to disperse and evenly bear the mechanical load between the boxes, prevent local deformation or structural instability, and further improve the ability of the vacuum cavity 41 to maintain a vacuum state for a long time, thereby achieving heat insulation and cold preservation, reducing the impact of external temperature changes on the internal temperature of the storage box 1, and improving the safety of goods during cold chain transportation and the overall thermal insulation durability of the insulated cargo box.

[0041] More specifically, if Figure 1 As shown, the active heat absorption refrigeration box 2 and the storage box 1 are surrounded to form an active refrigeration cavity 21; The active refrigeration device 6 includes a compressor 61 connected to the outer wall of the ventilation and cooling box 5, a condenser mechanism 62 connected to the upper side wall of the compressor 61, an expansion valve mechanism 63 arranged on the outer wall of the ventilation and cooling box 5 and connected to the condenser mechanism 62, and an evaporator mechanism 64 connected to the expansion valve mechanism 63 and inserted into the active refrigeration cavity 21. The evaporator mechanism 64 is sleeved on the outer wall of the storage box 1 and arranged in an array.

[0042] The compressor 61 of the present application is used to compress the refrigerant. The refrigerant is sent to the condenser mechanism 62 to release heat and then converted into a high-pressure liquid. It is then throttled and reduced in pressure by the expansion valve mechanism 63. The liquid refrigerant becomes a low-temperature and low-pressure state and enters the evaporator mechanism 64. The evaporator mechanism 64 is distributed in an array along the outer wall of the storage box 1, which can fully cover the entire outer surface of the storage box 1 and form a uniform cold source distribution in the active refrigeration cavity 21. At this time, the low-temperature refrigerant vaporizes and absorbs heat in the evaporator mechanism 64, and quickly absorbs heat from the surrounding of the storage box 1 to achieve efficient cooling. The present application not only ensures the rapid drop and uniform distribution of the internal temperature of the storage box 1, but also improves the heat exchange efficiency through the arrayed layout of the evaporator mechanism 64, reduces temperature dead corners, and effectively enhances the active cooling ability and temperature control accuracy of the cold chain transportation insulated cargo box.

[0043] In addition, if Figure 1 As shown, the ventilation and cooling box 5 and the vacuum insulation box 4 are surrounded to form a ventilation and insulation cavity 51; The ventilation and cooling box 5 includes a cargo box body 52 which is mounted on the outside of the vacuum insulation box 4, an insulation board 53 which is inserted into the ventilation and insulation cavity 51 and connected to the cargo box body 52 and the vacuum insulation box 4 respectively, and an active air supply mechanism 54 which is connected to the cargo box body 52 and is used to blow air into the ventilation and insulation cavity 51.

[0044] When the active air supply mechanism 54 of the present application is working, it introduces external air into the ventilation and insulation cavity 51 in an orderly manner, and takes away the heat in the upper part of the ventilation and cooling box 5 through air flow, thereby improving the heat dissipation efficiency of the outer shell above the cargo box, and the insulation board 53 is arranged at the lower part of the ventilation and insulation cavity 51 to form an insulation barrier. The present application reduces the impact of the external environment on the internal temperature of the box through a combination of layered ventilation and insulation, effectively delays and inhibits the transfer of heat from the outside of the box to the inside, thereby improving the insulation effect and cargo safety of the cold chain transportation insulated cargo box in a high temperature environment.

[0045] And, as Figure 2 As shown, the heat insulation board 53 is an aerogel board.

[0046] The insulation board 53 of the present application is made of aerogel board, which has low thermal conductivity and high thermal insulation performance, slows down the heat penetration rate, and improves the overall insulation efficiency and adaptability of the insulated cargo box to the external thermal environment. Through the application of aerogel board, not only the impact of the heat of the outer layer of the cargo box body 52 on the inner layer is reduced, and the low temperature maintenance time is extended, but also the temperature safety guarantee capability of the goods in cold chain transportation and the energy-saving effect of the insulation system are effectively improved.

[0047] Furthermore, if Figure 3 As shown, the ventilation and heat-insulating cavity 51 includes an insulation cavity 511 located below the cargo box body 52 and for inserting the insulation board 53, and a ventilation cavity 512 located above the cargo box body 52; a passive air inlet hole 521 connected to the ventilation cavity 512 is provided at one end of the cargo box body 52, and a passive air outlet hole 522 connected to the ventilation cavity 512 is provided at the other end of the cargo box body 52.

[0048] The heat insulation board 53 of the present application is inserted into the heat insulation cavity 511 to form an efficient barrier to the heat below. The aerogel board suppresses the heat transfer of the lower layer with its low thermal conductivity, while the ventilation cavity 512 above is naturally connected to the outside air through the passive air inlet holes 521 and the passive air outlet holes 522, and passive air flow is achieved by temperature difference or wind pressure driving. When the external temperature is high or the ambient wind speed changes, the air enters the ventilation cavity 512 through the passive air inlet holes 521, flows along the top of the box and is finally discharged from the passive air outlet holes 522. During the flow, it takes away part of the heat from the outer surface of the box to assist in cooling. The present application has efficient heat insulation and low energy heat dissipation through the zoning coordination of the heat insulation board 53 and the ventilation cavity 512, and the reasonable layout of the passive air inlet holes 521 and the passive air outlet holes 522, effectively delaying the transfer of heat to the interior of the cargo box, thereby improving the temperature control capability and cargo safety level of the cold chain transportation insulated cargo box in complex environments.

[0049] Furthermore, if Figure 3 and Figure 4 As shown, the active air supply mechanism 54 includes a solar panel assembly 541 connected to the upper side wall of the cargo box body 52, a power storage assembly 542 connected to the side wall of the cargo box body 52 and electrically connected to the solar panel assembly 541, a fan ventilation assembly 543 connected to the side wall of the cargo box body 52 and electrically connected to the power storage assembly 542, and a temperature detection assembly 544 inserted in the storage box 1 and electrically connected to the fan ventilation assembly 543; the fan ventilation assembly 543 is located on one side of the passive air inlet hole 521 and is connected to the ventilation cavity 512.

[0050] The solar panel assembly 541 of the present application converts solar energy into electrical energy and charges the power storage assembly 542 when there is light. The power storage assembly 542 provides a stable power supply for the fan ventilation assembly 543 and the temperature detection assembly 544. When the temperature detection assembly 544 detects that the temperature inside the storage box 1 reaches the set threshold, the temperature detection assembly 544 triggers the fan ventilation assembly 543 to work, and sends external air into the ventilation cavity 512 through the passive air inlet 521, so as to realize forced air circulation to take away the heat from the external surface of the box, thereby improving the cooling efficiency. At the same time, it can intelligently adjust the fan working state according to the real-time temperature inside the storage box 1, reduce energy consumption and improve temperature control accuracy. The active air supply mechanism 54 of the present application realizes green energy saving and intelligent temperature control of the cold chain transportation insulated cargo box through the coordination of efficient air supply of the solar panel assembly 541, the power storage assembly 542, the temperature detection assembly 544 and the fan ventilation assembly 543, and effectively enhances the temperature regulation ability of the cargo box during long-term transportation or high-temperature environment.

[0051] The temperature detection component 544 is preferably a temperature sensor.

[0052] Specifically, if Figure 5 As shown, a cold chain transportation insulation method includes a cold chain transportation insulation cargo box and the following steps: S1: The active refrigeration device 6 cools the storage box 1 to maintain a preset refrigeration temperature, while maintaining the phase change cold storage mechanism 32 at a preset temperature to maintain a solid state; S2: When the active refrigeration device 6 fails and stops refrigeration, the temperature inside the storage box 1 and the phase change cold storage mechanism 32 rises synchronously; S3: When the temperature of the phase-change cold storage mechanism 32 rises to the preset phase-change temperature, the phase-change cold storage mechanism 32 absorbs heat and melts, changing from solid to liquid; S4: The phase change cold storage mechanism 32 continuously absorbs heat to maintain a constant temperature during the phase change period, thereby forming a cold source buffer zone; S5: When the phase change cold storage mechanism 32 is completely melted, a temperature delay layer is formed to slow down the temperature rise rate; S6: When the active refrigeration device 6 resumes refrigeration, the phase-change cold storage mechanism 32 cools down and solidifies into a solid state.

[0053] The present application uses an active refrigeration device 6 to maintain the storage box 1 and the phase-change cold storage mechanism 32 in a solid state. When the active refrigeration device 6 fails and stops refrigerating, the temperatures of the storage box 1 and the phase-change cold storage mechanism 32 rise synchronously. The phase-change cold storage mechanism 32 melts and absorbs heat after reaching the phase change temperature, and continuously absorbs heat to form a cold source buffer, effectively delaying the increase in temperature in the box. After the active refrigeration device 6 resumes refrigeration, the phase-change cold storage mechanism 32 re-solidifies to complete cold storage, realizing the coordination of active and passive temperature control, and improving the temperature stability and safety assurance capabilities during cold chain transportation.

[0054] The implementation principles of a cold chain transport insulated cargo box and insulation method in the embodiment of the present application are as follows: The present invention relates to a cold chain transport insulated cargo box, wherein the active refrigeration device 6 is used to quickly cool the storage box body 1 and the active heat absorption refrigeration box body 2 to ensure that the internal temperature of the storage box body 1 drops and is maintained at a preset temperature, while keeping the phase change cold storage mechanism 32 in a solid state; when the active refrigeration device 6 stops or the energy efficiency decreases, the phase change cold storage mechanism 32 will melt and absorb heat during the temperature rise stage, forming passive cooling, further ensuring the temperature stability of the storage box body 1, and the vacuum insulation box body 4 suppresses the conduction and convection of external heat through the vacuum layer, thereby improving the thermal insulation performance of the entire cargo box, and the ventilation and cooling box body 5 is used to achieve rapid heat dissipation through air circulation to assist in regulating the temperature. The present application ensures that the loss of cold in the insulated cargo box can be effectively prevented under different working conditions, thereby improving the temperature stability and cargo safety of cold chain transportation. The array arrangement of the phase change cold storage mechanism 32 in the multi-layer structure of the present application can realize large-area, continuous melting and heat absorption, and the active and passive refrigeration and thermal insulation layers are clear and complement each other, effectively improving the overall cold preservation capacity and emergency guarantee capacity of the cargo box; The heat insulation board 53 is inserted into the heat insulation cavity 511 to form an efficient barrier to the heat below. The aerogel board suppresses the heat transfer from the lower layer with its low thermal conductivity, while the ventilation cavity 512 above is naturally connected to the outside air through the passive air inlet holes 521 and the passive air outlet holes 522, and passive air flow is achieved by temperature difference or wind pressure drive. When the external temperature is high or the ambient wind speed changes, the air enters the ventilation cavity 512 through the passive air inlet holes 521, flows along the top of the box and is finally discharged from the passive air outlet holes 522, taking away part of the heat from the outer surface of the box during the flow process, and assisting in cooling. The present application has efficient heat insulation and low energy heat dissipation through the zoning coordination of the heat insulation board 53 and the ventilation cavity 512, and the reasonable layout of the passive air inlet holes 521 and the passive air outlet holes 522, effectively delaying the transfer of heat to the interior of the cargo box, thereby improving the temperature control capability and cargo safety level of the cold chain transportation insulated cargo box in complex environments; A cold chain transportation insulation method, which maintains the storage box 1 and the phase change cold storage mechanism 32 in a solid state through an active refrigeration device 6. When the active refrigeration device 6 fails and stops refrigeration, the temperatures of the storage box 1 and the phase change cold storage mechanism 32 rise synchronously. The phase change cold storage mechanism 32 melts and absorbs heat after reaching the phase change temperature, and continuously absorbs heat to form a cold source buffer, effectively delaying the increase in temperature in the box. After the active refrigeration device 6 resumes refrigeration, the phase change cold storage mechanism 32 solidifies again to complete cold storage, realizing the coordination of active and passive temperature control, and improving the temperature stability and safety assurance capabilities during cold chain transportation.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A cold chain transport insulation cargo box, characterized in that: The invention comprises a storage box (1), an active heat absorption refrigeration box (2) sleeved on the outside of the storage box (1), a passive heat absorption refrigeration box (3) sleeved on the outside of the active heat absorption refrigeration box (2), a vacuum insulation box (4) sleeved on the outside of the passive heat absorption refrigeration box (3), a ventilation and cooling box (5) sleeved on the outside of the vacuum insulation box (4), and an active refrigeration device (6) connected to the outer wall of the ventilation and cooling box (5) and inserted into the active heat absorption refrigeration box (2); The passive heat absorption refrigeration box (3) comprises a passive refrigeration box body (31), and a phase change cold storage mechanism (32) connected to the inner side wall of the passive refrigeration box body (31) and sleeved on the outer side wall of the active heat absorption refrigeration box (2); the passive refrigeration box body (31) and the active heat absorption refrigeration box (2) are surrounded to form a passive refrigeration cavity (33), and the phase change cold storage mechanism (32) is inserted into the passive refrigeration cavity (33) and arranged in an array along the outer side wall of the active heat absorption refrigeration box (2); the phase change cold storage mechanism (32) is used to melt and absorb heat when the temperature rises.

2. The cold chain transport insulation container according to claim 1, characterized in that: The phase-change cold storage mechanism (32) comprises a cold storage shell (321) inserted into the passive refrigeration cavity (33) and connected to the passive refrigeration box body (31) and the active heat absorption refrigeration box (2), respectively; a cold storage composite material component (322) inserted into the cold storage shell (321); and an encapsulation layer (323) sleeved on the outside of the cold storage composite material component (322) and located between the cold storage shell (321) and the cold storage composite material component (322).

3. The cold chain transport insulation container according to claim 2, characterized in that: The cold storage composite material component (322) is a paraffin-graphite composite material.

4. The cold chain transport insulation container according to claim 1, characterized in that: The vacuum heat-insulating box (4) and the passive heat-absorbing refrigeration box (3) are enclosed to form a vacuum cavity (41); The vacuum heat-insulating box (4) comprises a vacuum box body (42), and connecting and fixing columns (43) respectively connected to the vacuum box body (42) and the passive refrigeration box body (31) and inserted into the vacuum cavity (41); the connecting and fixing columns (43) are arranged in an array along the outer side wall of the passive heat-absorbing refrigeration box (3).

5. The cold chain transport insulation container according to claim 1, characterized in that: The active heat absorption refrigeration box (2) and the storage box (1) are enclosed to form an active refrigeration cavity (21); The active refrigeration device (6) includes a compressor (61) connected to the outer wall of the ventilation and cooling box (5), a condenser mechanism (62) connected to the upper side wall of the compressor (61), an expansion valve mechanism (63) arranged on the outer wall of the ventilation and cooling box (5) and connected to the condenser mechanism (62), and an evaporator mechanism (64) connected to the expansion valve mechanism (63) and inserted into the active refrigeration cavity (21), and the evaporator mechanism (64) is sleeved on the outer wall of the storage box (1) and arranged in an array.

6. The cold chain transport insulation container according to claim 1, characterized in that: The ventilation and cooling box (5) and the vacuum insulation box (4) are enclosed to form a ventilation and insulation cavity (51); The ventilation and cooling box (5) comprises a cargo box body (52) sleeved on the outside of the vacuum insulation box (4), an insulation board (53) inserted into the ventilation and insulation cavity (51) and connected to the cargo box body (52) and the vacuum insulation box (4) respectively, and an active air supply mechanism (54) connected to the cargo box body (52) and used for blowing air into the ventilation and insulation cavity (51).

7. The cold chain transport insulation container according to claim 6, characterized in that: The heat insulation board (53) is an aerogel board.

8. The cold chain transport insulation container according to claim 6, characterized in that: The ventilation and heat-insulating cavity (51) includes a heat-insulating cavity (511) located below the cargo box body (52) and used for inserting the heat-insulating plate (53), and a ventilation cavity (512) located above the cargo box body (52); one end of the cargo box body (52) is provided with a passive air inlet hole (521) connected to the ventilation cavity (512), and the other end of the cargo box body (52) is provided with a passive air outlet hole (522) connected to the ventilation cavity (512).

9. The cold chain transport insulation container according to claim 8, characterized in that: The active air supply mechanism (54) includes a solar panel assembly (541) connected to the upper side wall of the cargo box body (52), a power storage assembly (542) connected to the side wall of the cargo box body (52) and electrically connected to the solar panel assembly (541), a fan ventilation assembly (543) connected to the side wall of the cargo box body (52) and electrically connected to the power storage assembly (542), and a temperature detection assembly (544) inserted into the storage box body (1) and electrically connected to the fan ventilation assembly (543); the fan ventilation assembly (543) is located on one side of the passive air inlet hole (521) and communicates with the ventilation cavity (512).

10. A cold chain transportation insulation method, characterized in that: The cold chain transport insulated cargo box according to any one of claims 1 to 9 further comprises the following steps: S1: The active refrigeration device (6) cools the storage box (1) to maintain a preset refrigeration temperature, and simultaneously maintains the phase-change cold storage mechanism (32) at a preset temperature to maintain a solid state; S2: When the active refrigeration device (6) fails and stops refrigeration, the temperature inside the storage box (1) and the phase-change cold storage mechanism (32) rises synchronously; S3: When the temperature of the phase-change cold storage mechanism (32) rises to a preset phase-change temperature, the phase-change cold storage mechanism (32) absorbs heat and melts, changing from a solid state to a liquid state; S4: the phase change cold storage mechanism (32) continuously absorbs heat to maintain a constant temperature during the phase change period, thereby forming a cold source buffer zone; S5: When the phase-change cold storage mechanism (32) is completely melted, a temperature delay layer is formed to delay the temperature rise rate; S6: When the active refrigeration device (6) resumes refrigeration, the phase-change cold storage mechanism (32) cools down and solidifies into a solid state.

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