A transportable storage device with controllable temperature

Abstract

The application discloses a controllable temperature-variable transportation and storage device, which comprises a box shell, a device mounting cavity is arranged at the back side of the box shell, a heat dissipation hole is arranged on the side wall of the device mounting cavity, an inner container is arranged on the inner surface of the box shell, a heat preservation layer is arranged between the box shell and the inner container, and a storage cavity is formed by the inner container. The application relates to the technical field of cold-chain storage and transportation equipment, and has the beneficial effect that the temperature control structure composed of a refrigeration assembly and a heating assembly is integrated in the same device, so that the same storage cavity can actively refrigerate and actively heat, and the refrigerant flow of the evaporator in the refrigeration assembly is continuously adjusted by a variable temperature regulating valve group, so that the storage cavity can realize accurate control of any temperature point in a wide temperature range of-10 DEG C to 30 DEG C.

Description

Technical Field

[0001] This invention relates to the field of cold chain storage and transportation equipment technology, and in particular to a transport and storage device with controllable temperature variation. Background Technology

[0002] Traditional transport and storage devices typically only have a single refrigeration function, unable to flexibly switch between different temperature ranges within the same device. This forces users to equip themselves with multiple sets of storage and transport equipment for different ingredients such as fresh produce and grains, resulting in low equipment utilization and high procurement costs. Furthermore, the refrigerant flow rate of the evaporator in traditional devices is fixed and cannot be actively adjusted. The compressor can only start and stop at a fixed frequency, causing the temperature inside the storage chamber to either continuously drop until it becomes too low or gradually rise after refrigeration stops. This large temperature fluctuation makes it difficult to precisely maintain the temperature within the optimal storage range required for specific ingredients. In addition, traditional devices lack multi-level differentiated control logic for temperature control to adapt to different food storage standards, and there is often obvious temperature stratification within the storage chamber—that is, the temperature near the evaporator or heating source is significantly lower or higher than other areas further away. This uneven temperature distribution can easily lead to localized spoilage of food during storage and transportation, causing serious storage and transportation losses. While existing technologies employ partitions to physically divide the storage chamber into multiple independent temperature zones, these solutions essentially sacrifice effective storage volume for temperature zone division. Furthermore, once the partition structure is fixed, the temperature range of each zone is difficult to dynamically adjust, failing to address the core challenges of wide-range temperature variations and temperature field uniformity within the same continuous space. Therefore, this project was developed to address these issues through in-depth research. Summary of the Invention

[0003] The purpose of this invention is to solve the aforementioned problems by designing a controllable temperature-controlled transport and storage device. This addresses the shortcomings of existing traditional transport and storage devices, which typically only possess a single refrigeration function and cannot flexibly switch between different temperature ranges within the same device. This forces users to equip themselves with multiple sets of storage and transport equipment for different ingredients such as fresh produce and grains, resulting in low equipment utilization and high procurement costs. Furthermore, in traditional devices, the refrigerant flow rate of the evaporator is fixed and cannot be actively adjusted, and the compressor can only start and stop at a fixed frequency. This causes the temperature inside the storage chamber to either continuously drop until it becomes too low or gradually rise after refrigeration stops, resulting in large temperature fluctuations and making it difficult to accurately maintain the temperature within the optimal storage range required for specific ingredients. In addition, traditional devices lack multi-level differentiated control logic to adapt to different food storage standards, and there is often obvious temperature stratification within the storage chamber, meaning that the temperature near the evaporator or heating source is significantly lower or higher than other areas further away. This uneven temperature distribution easily leads to localized spoilage of food during storage and transportation, causing serious storage and transportation losses. While existing technologies employ partitions to physically divide the storage chamber into multiple independent temperature zones, such solutions essentially sacrifice effective storage volume for temperature zone division. Furthermore, once the partition structure is fixed, the temperature range of each zone is difficult to dynamically adjust, failing to address the core challenges of wide-range temperature variation and temperature field uniformity within the same continuous space.

[0004] The technical solution of the present invention to achieve the above objectives is as follows: a controllable temperature-controlled transport and storage device, including a box shell, an equipment mounting cavity provided on the rear side of the box shell, heat dissipation holes provided on the side wall of the equipment mounting cavity, an inner liner provided on the inner surface of the box shell, a heat insulation layer provided between the box shell and the inner liner, and the inner liner enclosing to form a storage chamber. The outer shell of the enclosure is provided with a temperature control structure for regulating the temperature inside the storage chamber. The temperature control structure is coupled with a multi-level setting module, which is used to provide multiple preset temperature control levels with different target temperature ranges according to different storage objects. The preset temperature control settings include: a preset setting for fresh produce and a preset setting for grains and oils; The preset temperature range for fresh produce is 0-5 degrees Celsius, and the preset temperature range for grains and oils is 10-20 degrees Celsius. The storage chamber is equipped with a temperature detection module for real-time detection of the actual temperature inside the storage chamber. The outer shell of the enclosure is also equipped with a control module. The control module is signal-connected to the temperature control structure, the multi-level setting module, and the temperature detection module. The control module is configured to control the temperature control structure to adjust the temperature environment inside the storage chamber based on the difference between the target temperature range corresponding to the preset temperature control level selected by the user and the actual temperature detected by the temperature detection module, so that the temperature inside the storage chamber approaches the target temperature range corresponding to the preset temperature control level selected by the user. The storage chamber is also equipped with a temperature equalization structure to ensure a uniform temperature field distribution within the storage chamber and to reduce temperature deviations between different locations within the storage chamber.

[0005] Preferably, the temperature equalization structure includes an air guide channel disposed on the inner wall of the inner liner, and the air guide channel is provided with a plurality of air outlets for discharging the temperature regulating medium generated by the temperature control structure into the storage chamber and for equalizing the temperature field distribution in the storage chamber. The temperature equalization structure also includes a circulating fan disposed in the storage chamber for driving the gas circulation flow in the storage chamber to further equalize the temperature distribution in the storage chamber. The air guiding channel includes an annular air duct arranged circumferentially along the inner wall of the inner liner and several longitudinal air ducts arranged along the height direction of the inner wall of the inner liner. The annular air duct and the several longitudinal air ducts are interconnected, and the several air outlets are distributed at different height positions of the longitudinal air ducts.

[0006] Preferably, the temperature control structure includes: a cooling component, a heating component, and a baffle component; The refrigeration components include: a compressor, a condenser, a throttling element, and an evaporator; The compressor is installed in the equipment mounting cavity at the bottom of the housing shell, the condenser is installed on the outer wall of the housing shell, the throttling element is installed on the pipeline between the outlet of the condenser and the inlet of the evaporator, and the outlet end of the throttling element is connected to the inlet end of the evaporator. The throttling element is either a capillary tube or an expansion valve. The evaporator is located inside the storage chamber. The compressor, the condenser, the throttling element, and the evaporator are connected in sequence through pipelines to form a refrigeration cycle loop. The heating component includes: an electric heating element and a heat-conducting plate; The electric heating tube is installed on the inner wall surface of the inner liner facing the storage chamber via a fixed bracket, and the electric heating tube is arranged in an S-shaped reciprocating coil. The heat-conducting plate is attached to the surface of the electric heating tube facing the storage chamber to evenly conduct the heat generated by the electric heating tube to the storage chamber. The heat-conducting plate has an insert groove on one side of the electric heating tube that matches the outer contour of the electric heating tube, and the electric heating tube is embedded in the insert groove and fits tightly against the groove wall. The heat-conducting plate is a copper plate, and the side of the heat-conducting plate facing the storage chamber is a flat radiant heating surface.

[0007] Preferably, the barrier assembly includes: four L-shaped positioning angles, a freeing limit block, a storage cage, and a threaded lifting ring; The four L-shaped positioning angles are set at the four corners of the surface of the heat-conducting plate facing the storage chamber. The free-standing limiting block is set at the included angle of the four L-shaped positioning angles. The storage cage is suspended above the heat-conducting plate by the free-standing limiting block set at the included angle of the four L-shaped positioning angles. The threaded lifting ring is set at the four corners of the top of the storage cage.

[0008] Preferably, the refrigeration assembly further includes a temperature regulating valve group disposed on the pipeline between the condenser outlet and the throttling element inlet for regulating the flow rate of refrigerant flowing through the evaporator; The variable temperature regulating valve group is an electronic expansion valve or composed of multiple solenoid valves, and the variable temperature regulating valve group is signal-connected to the control module. The control module changes the cooling capacity of the evaporator by adjusting the opening of the variable temperature regulating valve group to achieve continuous adjustment of the storage chamber within a wide temperature range.

[0009] Preferably, the multi-level setting module includes a storage standard database storing storage temperature standard information corresponding to at least two types of food, and a level selection interface with the storage standard database built into it and set on the outer shell of the box. The at least two food categories include at least fresh food and grains and oils; The gear selection interface is equipped with several gear selection controls that correspond one-to-one with the at least two food categories.

[0010] Preferably, the control module includes a temperature difference calculation unit for calculating the real-time temperature difference between the actual temperature and the center temperature of the target temperature range, a PID control unit for generating a temperature control adjustment signal by performing proportional-integral-derivative operations based on the real-time temperature difference, and a drive unit for driving the temperature control structure to perform corresponding temperature adjustment actions based on the temperature control adjustment signal. The PID control unit has multiple sets of preset PID parameters, each set of PID parameters corresponding to different preset temperature control levels. The control module calls the corresponding PID parameter set to perform temperature control adjustment according to the preset temperature control level currently selected by the user.

[0011] Preferably, the temperature detection module includes multiple temperature sensors distributed at different locations within the storage chamber, and the multiple temperature sensors are arranged in an array within the storage chamber; The control module is configured to calculate the average temperature and maximum temperature difference within the storage chamber based on the temperature values ​​detected by the multiple temperature sensors. When the maximum temperature difference exceeds a preset threshold, the control module activates the temperature equalization structure to perform temperature equalization adjustment.

[0012] Preferably, the outer casing is provided with four sets of casters at the bottom corners, the outer casing is provided with push-pull handles on the side walls, the outer casing is provided with an openable lid, and a sealing strip is provided between the lid and the outer casing, the sealing strip being used to seal the storage chamber when the lid is closed; A power interface is also provided on the side wall of the housing, which is used to connect an external power source to supply power to the temperature control structure and the control module.

[0013] A method of using a temperature-controlled transport and storage device includes the following steps: S1: Based on the type of food items to be stored, select the corresponding preset temperature control level on the multi-level setting module. The preset temperature control level includes at least a fresh food preset level suitable for storing fresh agricultural products and a grain and oil preset level suitable for storing grains and oils. S2: The control module retrieves the corresponding target temperature range from the stored standard database according to the selected preset temperature control level; S3: The temperature detection module detects the actual temperature inside the storage chamber in real time and sends the detected actual temperature signal to the control module; S4: The control module compares the actual temperature with the target temperature range. When the actual temperature deviates from the target temperature range, the control module controls the temperature control structure to cool or heat the storage chamber until the actual temperature falls within the target temperature range. S5: During the operation of the temperature control structure, the control module controls the temperature equalization structure to start or stop according to the temperature deviation at different locations in the storage chamber, so as to maintain the uniformity of the temperature field in the storage chamber. S6: During transportation or storage, the control module continuously monitors the actual temperature inside the storage chamber and dynamically adjusts the operating status of the temperature control structure to keep the temperature inside the storage chamber within the target temperature range.

[0014] The controllable temperature-controlled transport and storage device manufactured using the technical solution of this invention has the following advantages: By integrating a temperature control structure consisting of a refrigeration component and a heating component into the same device, the same storage chamber can actively cool and actively heat. Combined with a variable-temperature regulating valve group to continuously adjust the refrigerant flow through the evaporator in the refrigeration component, the storage chamber can achieve precise control of any temperature point within a wide temperature range of -10℃ to 30℃. Thus, with the same hardware structure, it can simultaneously meet the needs of cold chain transportation of fresh agricultural products at 0~5℃ and medium-to-long-term storage of grains and oils at 10~20℃, spanning a wide temperature range of 15℃. This eliminates the need for multiple sets of equipment for different ingredients, significantly reducing user procurement costs and improving equipment utilization. Furthermore, the multi-level setting module stores a database of standard storage temperature information for different food categories. Combined with the level selection interface, users can automatically select the target temperature range for the corresponding level with a single click. This, along with multiple preset PID parameters for different levels in the control module and continuous calculation of the real-time temperature difference between the actual temperature and the target center temperature, enables the control module to drive the opening of the variable temperature regulating valve, the operating frequency of the refrigeration components, and the heating components. The duty cycle of the device dynamically and continuously changes with the actual temperature, achieving differentiated high-precision temperature control for different storage objects. Furthermore, the air guide channel, composed of annular and several longitudinal air ducts interconnected, along with several air outlets at different heights in each longitudinal air duct, and the forced drive of the circulating fan in the temperature equalization structure to the gas inside the storage chamber, ensures that the temperature-regulating medium is simultaneously and uniformly delivered into the storage chamber from multiple height and circumferential directions. This eliminates the severe temperature stratification phenomenon present in traditional devices. Meanwhile, temperature detection modules distributed in an array within the storage chamber monitor the temperature at each point in real time, and the control module controls the temperature... When the maximum temperature difference exceeds the preset threshold, the temperature equalization structure is actively activated for balanced adjustment, further ensuring the uniformity of the temperature field throughout the storage chamber and preventing food from spoiling due to localized overcooling or overheating. Furthermore, the baffle component in the temperature control structure allows the temperature regulating medium in the storage chamber to pass through the perforated holes of the baffle component and fully exchange heat with the various surfaces of the items. At the same time, the baffle component limits the storage items around their perimeter and facilitates loading and unloading, which not only improves temperature control efficiency but also ensures structural stability during transportation. This effectively solves the problems of food loss caused by large temperature fluctuations, uncontrollable temperature differences, and inability to perform multiple functions in traditional storage and transportation devices. Attached Figure Description

[0015] Figure 1 This is a first front-view three-dimensional structural diagram of a controllable temperature-controlled transport and storage device according to the present invention.

[0016] Figure 2 This is a second front-view three-dimensional structural diagram of a controllable temperature-controlled transport and storage device according to the present invention.

[0017] Figure 3 This is a first rear-view three-dimensional structural diagram of a controllable temperature-controlled transport and storage device according to the present invention.

[0018] Figure 4 This is a second rear view structural schematic diagram of a temperature-controlled transport and storage device according to the present invention.

[0019] Figure 5 This is a schematic diagram of the main structure of a temperature-controlled transport and storage device according to the present invention.

[0020] Figure 6 This is a partial top view of the controllable temperature transport and storage device described in this invention.

[0021] Figure 7 This is a first partial cross-sectional view of the controllable temperature transport and storage device described in this invention.

[0022] Figure 8 This is a partially enlarged structural diagram of section B of the controllable temperature-controlled transport and storage device described in this invention.

[0023] Figure 9 This is a second partial cross-sectional view of the transport and storage device with controllable temperature according to the present invention.

[0024] Figure 10 This is a partial cross-sectional view of point C of the controllable temperature transport and storage device described in this invention.

[0025] Figure 11 This is a front-view perspective three-dimensional structural diagram of the heating component and the barrier component described in this invention.

[0026] Figure 12 This is a partial cross-sectional view of the heating component and the baffle component described in this invention.

[0027] Figure 13 This is a partially enlarged structural diagram of point A of the heating component and the baffle component described in this invention.

[0028] Figure 14 This is a bottom view of the heat-conducting plate described in this invention.

[0029] Figure 15 This is a schematic diagram of the structural framework of the multi-gear setting module of the present invention.

[0030] Figure 16This is a schematic diagram of the structural framework of the control module described in this invention.

[0031] Figure 17 This is a flowchart illustrating the steps of using the controllable temperature-controlled transport and storage device described in this invention.

[0032] In the diagram: 1. Outer shell, 2. Equipment mounting cavity, 3. Heat dissipation holes, 4. Inner liner, 5. Insulation layer, 6. Storage chamber, 7. Temperature control structure, 701. Compressor, 702. Condenser, 703. Throttling element, 704. Evaporator, 705. Electric heating element, 706. Heat conduction plate, 707. Embedded groove, 708. Radiant heating surface, 709. L-shaped positioning angle, 710. Emptying limit block, 711. Storage cage, 712. Thread. 713. Lifting ring; 8. Variable temperature regulating valve assembly; 9. Multi-level setting module; 10. Level selection interface; 11. Level selection control; 12. Temperature detection module; 13. Temperature sensor; 14. Control module; 15. Temperature equalization structure; 16. Air outlet; 17. Circulating fan; 18. Annular air duct; 19. Longitudinal air duct; 10. Casters; 11. Push-pull handle; 12. Box cover; 13. Sealing strip; 14. Power interface. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-17 As shown, a transport and storage device with controllable temperature variation. Example

[0034] A temperature-controlled transport and storage device includes a housing shell 1, an equipment mounting cavity 2 is provided on the rear side of the housing shell 1, heat dissipation holes 3 are provided on the side wall of the equipment mounting cavity 2, an inner liner 4 is provided on the inner surface of the housing shell 1, a heat insulation layer 5 is provided between the housing shell 1 and the inner liner 4, and the inner liner 4 encloses to form a storage chamber 6. The outer shell 1 of the enclosure is provided with a temperature control structure 7 for adjusting the temperature inside the storage chamber 6. The temperature control structure 7 is coupled with a multi-level setting module 8, which is used to provide multiple preset temperature control levels with different target temperature ranges according to different storage objects. Multiple preset temperature control settings include: a preset setting for fresh produce and a preset setting for grains and oils; The preset temperature range for fresh produce is 0-5 degrees Celsius, and the preset temperature range for grains and oils is 10-20 degrees Celsius. A temperature detection module 9 is installed inside the storage chamber 6 for real-time detection of the actual temperature inside the storage chamber 6. A control module 10 is also installed on the outer shell 1. The control module 10 is connected to the temperature control structure 7, the multi-level setting module 8 and the temperature detection module 9. The control module 10 is configured to control the temperature control structure 7 to adjust the temperature environment inside the storage chamber 6 according to the difference between the target temperature range corresponding to the preset temperature control level selected by the user and the actual temperature detected by the temperature detection module 9, so that the temperature inside the storage chamber 6 approaches the target temperature range corresponding to the preset temperature control level selected by the user. The storage chamber 6 is also equipped with a temperature equalization structure 11 to make the temperature field in the storage chamber 6 uniformly distributed and reduce the temperature deviation between different positions in the storage chamber 6.

[0035] It should be noted that the user selects the corresponding preset temperature control level on the multi-level setting module 8 according to the category of the items to be stored. After receiving the level selection signal, the control module 10 stores the target temperature range corresponding to that level as the control target. The temperature detection module 9 continuously detects the actual temperature inside the storage chamber 6 and sends the signal to the control module 10. The control module 10 compares the actual temperature with the target temperature range. If the actual temperature is higher than the upper limit of the target temperature range, the control module 10 sends a cooling command to the temperature control structure 7, causing the temperature control structure 7 to cool down the storage chamber 6; if the actual temperature is lower than the lower limit of the target temperature range, the control module 10 sends a heating command to the temperature control structure 7, causing the temperature control structure 7 to heat up the storage chamber 6. During the above temperature control process, the temperature equalization structure 11 works continuously to ensure that the temperature at all locations inside the storage chamber 6 tends to be uniform, avoiding local overcooling or overheating. Through the above closed-loop control, the temperature inside the storage chamber 6 is always maintained within the target temperature range.

[0036] Specifically, the temperature equalization structure 11 includes an air guide channel set on the inner wall of the inner liner 4, and the air guide channel is provided with a number of air outlets 111 for discharging the temperature regulating medium generated by the temperature control structure 7 into the storage chamber 6 and for evenly distributing the temperature field in the storage chamber 6. The temperature equalization structure 11 also includes a circulating fan 112 disposed in the storage chamber 6 for driving the gas circulation flow in the storage chamber 6 to further equalize the temperature distribution in the storage chamber 6; The air guiding channel includes an annular air duct 113 arranged circumferentially along the inner wall of the inner liner 4 and several longitudinal air ducts 114 arranged along the height of the inner wall of the inner liner 4. The annular air duct 113 and the several longitudinal air ducts 114 are interconnected, and several air outlets 111 are distributed at different height positions of the longitudinal air ducts 114.

[0037] It should be noted that the temperature-regulating medium generated by the temperature control structure 7 first enters the annular air duct 113, and after being distributed by the annular air duct 113, it is diverted to each longitudinal air duct 114. The temperature-regulating medium flows upward and downward along the longitudinal air ducts 114, and is discharged from the air outlets 111 at different heights on each longitudinal air duct 114, entering the interior of the storage chamber 6. Since the air outlets 111 are distributed in both the vertical and circumferential directions, the temperature-regulating medium can be evenly delivered to all areas of the storage chamber 6. At the same time, the circulating fan 112 operates, driving the gas inside the storage chamber 6 to circulate from top to bottom or from bottom to top, so that the temperature-regulating medium is fully mixed with the air inside the storage chamber 6, further eliminating temperature stratification and local temperature differences, and achieving a uniform temperature field distribution throughout the entire storage chamber 6.

[0038] Specifically, the temperature control structure 7 includes: a cooling component, a heating component, and a baffle component; The refrigeration components include: compressor 701, condenser 702, throttling element 703, and evaporator 704; The compressor 701 is installed in the equipment mounting cavity 2 at the bottom of the outer casing 1. The condenser 702 is installed on the outer wall of the outer casing 1. The throttling element 703 is installed on the pipeline between the outlet of the condenser 702 and the inlet of the evaporator 704, and the outlet end of the throttling element 703 is connected to the inlet end of the evaporator 704. The throttling element 703 is either a capillary tube or an expansion valve. The evaporator 704 is located inside the storage chamber 6. The compressor 701, condenser 702, throttling element 703 and evaporator 704 are connected in sequence through pipelines to form a refrigeration cycle loop. The heating components include: an electric heating element 705 and a heat-conducting plate 706; The electric heating tube 705 is installed on the inner wall surface of the inner liner 4 facing the storage chamber 6 by a fixed bracket, and the electric heating tube 705 is arranged in an S-shaped reciprocating coil. The heat conduction plate 706 is attached to the surface of the electric heating tube 705 facing the storage chamber 6 to evenly conduct the heat generated by the electric heating tube 705 to the storage chamber 6. The heat-conducting plate 706 has an inlay groove 707 on the side facing the electric heating tube 705 that matches the outer contour of the electric heating tube 705. The electric heating tube 705 is inlayed in the inlay groove 707 and fits tightly against the groove wall of the inlay groove 707. The heat-conducting plate 706 is a copper plate, and the side of the heat-conducting plate 706 facing the storage chamber 6 is a flat radiant heating surface 708.

[0039] It should be noted that when compressor 701 starts, it compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, which is then discharged into condenser 702. In condenser 702, the high-temperature, high-pressure gaseous refrigerant exchanges heat with the outside air and condenses into a high-temperature, high-pressure liquid refrigerant. When the liquid refrigerant flows through throttling element 703, it becomes a low-temperature, low-pressure liquid refrigerant due to throttling and pressure reduction, and enters evaporator 704. In evaporator 704, the low-temperature, low-pressure refrigerant absorbs heat from storage chamber 6 and evaporates into a gaseous state, thereby achieving cooling. The evaporated gaseous refrigerant returns to compressor 701 through pipelines, completing one refrigeration cycle. When heating is required, electric heating element 705 is energized, and its internal heating wire generates heat. The heat is conducted through the metal sheath to the outer surface of electric heating element 705. Because electric heating element 705 is tightly fitted with the embedded groove 707 of heat-conducting plate 706, heat is rapidly conducted to the entire heat-conducting plate 706. The heat-conducting plate 706 provides uniform heat radiation to the items and air in the storage chamber 6 with its flat radiant heating surface 708. At the same time, the air in the storage chamber 6 undergoes convective heat exchange with the surface of the heat-conducting plate 706, thereby raising the temperature of the storage chamber 6.

[0040] Specifically, the blocking assembly includes: four L-shaped positioning angles 709, a freeing limit block 710, a storage cage 711, and a threaded lifting ring 712; Four L-shaped positioning angles 709 are set at the four corners of the surface of the heat-conducting plate 706 facing the storage chamber 6. A free-standing limiting block 710 is set at the included angle of the four L-shaped positioning angles 709. The storage cage 711 is suspended above the heat-conducting plate 706 by the free-standing limiting blocks 710 set at the included angle of the four L-shaped positioning angles 709. Threaded lifting rings 712 are set at the four corners of the top of the storage cage 711.

[0041] It should be noted that the storage cage 711 is used to place items to be stored. After the items are placed inside the storage cage 711, the storage cage 711 is suspended above the heat-conducting plate 706 by the suspension limiting block 710. Because the storage cage 711 has a hollow structure and its bottom is suspended, the temperature-regulating medium in the storage chamber 6 can flow freely through the hollow holes of the storage cage 711, and fully exchange heat with all surfaces of the items, improving temperature control efficiency. At the same time, the L-shaped positioning angle 709 limits the storage cage 711 around its perimeter to prevent it from shifting horizontally or tipping over during transportation. When it is necessary to remove or replace the storage cage 711, the storage cage 711 can be lifted out as a whole through the threaded lifting ring 712 for easy loading and unloading operations.

[0042] Specifically, the refrigeration assembly also includes a variable temperature regulating valve group 713, which is disposed on the pipeline between the outlet of the condenser 702 and the inlet of the throttling element 703 for regulating the flow rate of refrigerant through the evaporator 704; The variable temperature regulating valve group 713 is an electronic expansion valve or is composed of multiple solenoid valves, and the variable temperature regulating valve group 713 is connected to the control module 10 by signal. The control module 10 changes the cooling capacity of the evaporator 704 by adjusting the opening degree of the variable temperature regulating valve group 713 to realize the continuous adjustment of the storage chamber 6 in a wide temperature range.

[0043] It should be noted that in the refrigeration cycle, the refrigerant flow rate through the evaporator 704 directly determines the refrigeration capacity of the evaporator 704. When the control module 10 determines that the actual temperature in the storage chamber 6 deviates significantly from the target temperature range, the control module 10 sends an increase opening command to the variable temperature regulating valve group 713, allowing more refrigerant to flow into the evaporator 704, increasing the refrigeration capacity, and achieving rapid cooling. When the actual temperature approaches the target temperature range, the control module 10 sends a decrease opening command to the variable temperature regulating valve group 713, reducing the refrigerant flow rate, decreasing the refrigeration capacity, and achieving precise temperature control. Through the coordinated operation of the variable temperature regulating valve group 713 and the variable frequency operation of the compressor 701, the storage chamber 6 can achieve precise control of any temperature point within a wide temperature range of -10℃ to 30℃, meeting the diverse needs of different foods for different storage temperatures.

[0044] Specifically, the multi-level setting module 8 includes a storage standard database that stores storage temperature standard information for at least two types of food, and a level selection interface 801 that has the storage standard database built into it and is set on the outer shell 1 of the cabinet. At least two food categories must include both fresh produce and grains / oils; The gear selection interface 801 has several gear selection controls 802 that correspond one-to-one with at least two types of ingredients.

[0045] It should be noted that, according to the categories of items to be stored, the user presses the corresponding gear selection control 802 on the gear selection interface 801. Upon triggering, the gear selection control 802 generates an electrical signal, which is transmitted to the control module 10 via a signal line. Upon receiving this signal, the control module 10 reads the temperature range data corresponding to that gear from the storage standard database and writes this temperature range into its random access memory as the current target temperature range. Subsequently, the control module 10 uses this target temperature range as a reference to perform closed-loop temperature control of the storage chamber 6. Through this one-click operation, users do not need to manually set specific temperature values ​​or possess professional knowledge of the storage temperatures of different foods, thus achieving scientific and precise temperature control management.

[0046] Specifically, the control module 10 includes a temperature difference calculation unit for calculating the real-time temperature difference between the actual temperature and the center temperature of the target temperature range, a PID control unit for generating a temperature control adjustment signal by performing proportional-integral-derivative operations based on the real-time temperature difference, and a drive unit for driving the temperature control structure 7 to perform corresponding temperature adjustment actions based on the temperature control adjustment signal. The PID control unit has multiple sets of preset PID parameters, each set of PID parameters corresponding to different preset temperature control levels. The control module 10 calls the corresponding PID parameter set according to the preset temperature control level currently selected by the user to perform temperature control adjustment.

[0047] It should be noted that the temperature difference calculation unit calculates the difference between the actual temperature of storage chamber 6 and the target temperature center value in real time. This difference is sent to the PID control unit, which performs proportional, integral, and derivative operations on the difference based on the PID parameter group corresponding to the currently selected gear, and outputs a control quantity. This control quantity reflects the required cooling or heating capacity. The drive unit converts this control quantity into a corresponding drive signal, driving the compressor 701 frequency converter to adjust the compressor 701 speed, driving the variable temperature control valve group 713 to adjust the valve opening, or driving the electric heating tube 705 to energize and heat. Through the above closed-loop PID control, the temperature in storage chamber 6 can quickly, stably, and accurately converge to the target temperature.

[0048] Specifically, the temperature detection module 9 includes multiple temperature sensors 901 distributed at different locations within the storage chamber 6, and the multiple temperature sensors 901 are arranged in an array within the storage chamber 6. The control module 10 is configured to calculate the average temperature and maximum temperature difference in the storage chamber 6 based on the temperature values ​​detected by multiple temperature sensors 901. When the maximum temperature difference exceeds a preset threshold, the control module 10 activates the temperature equalization structure 11 to perform temperature equalization adjustment.

[0049] It should be noted that multiple temperature sensors 901 independently detect the temperature at their respective locations and send their temperature signals to the control module 10. After reading the data from all temperature sensors 901, the control module 10 calculates the average value as feedback for conventional PID temperature control, and simultaneously monitors the maximum temperature deviation between different points in real time. When the temperature control structure 7 is operating normally and the temperature within the storage chamber 6 is uniform, the maximum temperature difference is usually less than a preset threshold, and the temperature equalization structure 11 operates in standby or low-power mode. When significant temperature stratification or localized overheating / overcooling occurs within the storage chamber 6 due to frequent opening and closing of the lid 14, uneven loading of items, or a localized malfunction of the temperature control structure 7, the maximum temperature difference exceeds the preset threshold. The control module 10 immediately activates the circulating fan 112 at high speed and directs the temperature-regulating medium to the abnormal temperature area by adjusting the opening of the air outlets 111 in each air duct until the temperature at each point becomes uniform and the maximum temperature difference falls back below the threshold. This mechanism effectively prevents localized spoilage of food caused by excessive localized temperatures.

[0050] Specifically, the four corners of the bottom of the outer shell 1 are provided with a set of casters 12, the side wall of the outer shell 1 is provided with a push-pull handle 13, the top of the outer shell 1 is provided with an openable lid 14, and a sealing strip 15 is provided between the lid 14 and the outer shell 1. The sealing strip 15 is used to seal the storage chamber 6 when the lid 14 is closed. A power interface 16 is also provided on the side wall of the outer casing 1. The power interface 16 is used to connect an external power source to supply power to the temperature control structure 7 and the control module 10.

[0051] It should be noted that the operator can push or pull the device using the push-pull handle 13, and the device can be easily moved to the target position by the rolling action of the moving wheel set 12. After reaching the target position, the braking mechanism of the moving wheel set 12 can be locked to make the device stop stably. After placing the items, the lid 14 is closed. The sealing strip 15 undergoes elastic deformation under the pressure of the lid 14, forming a reliable sealing interface, effectively preventing the leakage of the temperature-regulating medium in the storage chamber 6 and the intrusion of external hot air. By connecting an external power source through the power interface 16, the temperature control structure 7 and the control module 10 can be powered on and start temperature control operation.

[0052] A method of using a temperature-controlled transport and storage device includes the following steps: S1: Based on the type of food items to be stored, select the corresponding preset temperature control level on the multi-level setting module 8. The preset temperature control levels include at least the fresh food preset level suitable for storing fresh agricultural products and the grain and oil preset level suitable for storing grains and oils. S2: The control module 10 retrieves the corresponding target temperature range from the stored standard database according to the selected preset temperature control level; S3: Temperature detection module 9 detects the actual temperature inside storage chamber 6 in real time and sends the detected actual temperature signal to control module 10; S4: The control module 10 compares the actual temperature with the target temperature range. When the actual temperature deviates from the target temperature range, the control module 10 controls the temperature control structure 7 to cool or heat the storage chamber 6 until the actual temperature falls within the target temperature range. Specifically, if the actual temperature is higher than the upper limit of the target range, the control module 10 activates the refrigeration components: the compressor 701 starts, the condenser fan runs, the variable temperature regulating valve group 713 adjusts to the corresponding opening degree according to the temperature difference, the refrigerant flows in the circulation loop, and the evaporator 704 absorbs heat from the storage chamber 6 to achieve cooling. If the actual temperature is lower than the lower limit of the target range, the control module 10 activates the heating components: the electric heating tube 705 is energized and heats up, and the heat is radiated to the interior of the storage chamber 6 through the heat conduction plate 706 to achieve heating and temperature rise.

[0053] S5: During the operation of the temperature control structure 7, the control module 10 controls the temperature equalization structure 11 to start or stop according to the temperature deviation at different locations in the storage chamber 6, so as to maintain the uniformity of the temperature field in the storage chamber 6. Specifically, the control module 10 monitors the readings of each temperature sensor 901 in real time and calculates the maximum temperature difference value ΔTmax. When ΔTmax exceeds a preset threshold, the control module 10 starts the circulating fan 112 and can distribute the airflow to each area by adjusting the angle of the guide vanes at each air outlet 111, so that cool or hot air is forced to circulate and be delivered to the temperature abnormal area, thereby quickly eliminating temperature stratification and local temperature differences. When ΔTmax falls below the threshold, the circulating fan 112 switches to low-speed operation or stops operating.

[0054] S6: During transportation or storage, the control module 10 continuously monitors the actual temperature inside the storage chamber 6 and dynamically adjusts the operating status of the temperature control structure 7 to keep the temperature inside the storage chamber 6 within the target temperature range.

[0055] Specifically, steps S3 to S5 are repeatedly executed throughout the entire transportation or storage cycle. The control module 10 uses PID closed-loop control to continuously adjust the operating frequency of the compressor 701, the opening degree of the temperature regulating valve group 713, and the on / off duty cycle of the electric heating tube 705 based on the real-time temperature difference. Simultaneously, it intermittently activates the temperature equalization structure 11 according to the temperature field uniformity requirements. Through this continuous monitoring and dynamic adjustment, the temperature within the storage chamber 6 is consistently and strictly controlled within the target temperature range throughout the entire storage and transportation cycle, effectively solving the problem of food loss caused by large temperature fluctuations and uncontrollable temperature differences in traditional storage and transportation devices. Example

[0056] Taking the cold chain transportation of fresh strawberries as an example, after the strawberries are picked, they are pre-cooled to 4℃ and then placed in the storage basket 711. The user, based on the type of item to be stored (fresh produce), presses the corresponding selection control 802 for the "Fresh Produce" setting on the selection interface 801. The multi-level setting module 8 selects the target temperature range for the fresh produce preset setting. The control module 10 calculates the real-time temperature difference Δt = +22.5℃ between the actual temperature detected by the temperature detection module 9 inside the storage chamber 6 and the target center temperature of 2.5℃ through the temperature difference calculation unit. The PID adjustment unit calls the PID parameter group corresponding to the fresh produce setting to perform calculations, generating a cooling adjustment signal. The drive unit then drives the temperature control structure 7 to start the cooling mode. The compressor 701 starts operating, compressing the refrigerant into a high-temperature, high-pressure gas, which is then discharged into the condenser 702. After heat exchange with the outside air in the condenser 702, the refrigerant becomes liquid. The liquid refrigerant flows through the temperature regulating valve group 713 and the throttling element 703 before entering the evaporator 704. The evaporator 704 absorbs heat from the storage chamber 6 to achieve cooling. During the cooling process, the temperature regulating valve group 713 dynamically adjusts its opening according to the real-time temperature difference. When the actual temperature is high, it maintains a larger opening for rapid cooling; when the actual temperature approaches the target temperature range, it gradually reduces the opening to achieve precise temperature control. Simultaneously, the temperature regulating medium enters the annular air duct 113 and is distributed to each longitudinal air duct 114, and is evenly delivered into the storage chamber 6 through the air outlets 111 at different heights. The circulating fan 112 operates synchronously to drive the cold air circulation, eliminating temperature stratification. When the maximum temperature difference detected by each temperature sensor 901 in the temperature detection module 9 exceeds the preset threshold of 2℃, the control module 10 activates the enhanced temperature equalization structure 11 to ensure uniform temperature throughout the storage chamber 6. The storage basket 711 is suspended above the heat-conducting plate 706, supported by a freestanding limiting block 710. Cold air passes through the perforated holes of the storage basket 711 and fully exchanges heat with the surfaces of the strawberries, ensuring that each strawberry is in a uniform temperature field of 0~5℃. An L-shaped positioning angle 709 limits the storage basket 711 around its perimeter to prevent movement during transportation. A threaded lifting ring 712 facilitates lifting the entire basket during loading and unloading.

[0057] During this process, the variable temperature regulating valve group 713 and the compressor 701 work together in a variable frequency operation to rapidly reduce the storage chamber 6 from the ambient temperature of 25°C to the target temperature range and maintain it precisely, so as to achieve high-quality storage and transportation of fresh strawberries in a cold chain environment of 0~5°C. Example

[0058] Taking the medium- to long-term storage of edible oil as an example, the bottled edible oil is placed in the storage basket 711. The user, based on whether the item to be stored is grain or oil, presses the corresponding gear selection control 802 on the gear selection interface 801 for the "Grain and Oil" gear. The multi-gear setting module 8 selects the preset grain and oil gear as the target temperature range. The control module 10 calculates the real-time temperature difference between the actual temperature detected by the temperature detection module 9 in the storage chamber 6 (e.g., 35℃ in summer or 5℃ in winter) and the target center temperature of 15℃ using the temperature difference calculation unit. The PID adjustment unit calls the PID parameter group corresponding to the grain and oil gear for calculation and generates the corresponding temperature control adjustment signal. The drive unit drives the temperature control structure 7 to perform cooling or heating actions. If the actual temperature is higher than 20℃, the compressor 701 starts, and the refrigerant enters the evaporator 704 after passing through the condenser 702, the temperature regulating valve group 713, and the throttling element 703, cooling the storage chamber 6 to a temperature range of 10~20℃. If the actual temperature is below 10℃, the electric heating element 705 is energized and heats up. The heat is conducted through the embedded groove 707 to the copper heat-conducting plate 706, and then evenly transferred to the storage chamber 6 by the radiant heating surface 708 of the heat-conducting plate 706, raising the temperature to the range of 10~20℃. During cooling or heating, the variable temperature regulating valve group 713 finely adjusts the opening according to the deviation between the actual temperature and the target temperature range. When the deviation is large, the opening is increased to quickly adjust the temperature; when the deviation approaches zero, the opening is decreased to achieve fine maintenance, ensuring that the temperature remains stable within the range of 10~20℃. The temperature regulating medium is evenly supplied through the annular air duct 113, the longitudinal air duct 114, and the air outlet 111. The circulating fan 112 drives the internal gas circulation to ensure a uniform temperature field within the storage chamber 6. When the maximum temperature difference detected by each temperature sensor 901 exceeds the preset threshold, the control module 10 activates the temperature equalization structure 11 to perform temperature equalization adjustment.

[0059] The storage cage 711 is suspended above the heat-conducting plate 706, supported by a freestanding limiting block 710, allowing for thorough heat exchange between the bottled edible oil and the temperature-regulating medium in the storage chamber 6. An L-shaped positioning angle 709 limits and secures the storage cage 711, preventing it from tipping over during transport. A threaded lifting ring 712 facilitates the overall lifting during loading and unloading.

[0060] The above technical solutions only embody the preferred technical solutions of the present invention. Any modifications that may be made by those skilled in the art to certain parts therein embody the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A temperature-controlled transport and storage device, comprising a housing (1), characterized in that, The outer shell (1) of the box is provided with a device installation cavity (2) on the rear side. The side wall of the device installation cavity (2) is provided with heat dissipation holes (3). The inner surface of the outer shell (1) is provided with an inner liner (4). A heat insulation layer (5) is provided between the outer shell (1) and the inner liner (4). The inner liner (4) encloses and forms a storage chamber (6). The outer shell (1) of the enclosure is provided with a temperature control structure (7) for adjusting the temperature inside the storage chamber (6). The temperature control structure (7) is coupled with a multi-level setting module (8). The multi-level setting module (8) is used to provide multiple preset temperature control levels with different target temperature ranges according to different storage objects. The preset temperature control settings include: a preset setting for fresh produce and a preset setting for grains and oils; The preset temperature range for fresh produce is 0-5 degrees Celsius, and the preset temperature range for grains and oils is 10-20 degrees Celsius. The storage chamber (6) is equipped with a temperature detection module (9) for real-time detection of the actual temperature inside the storage chamber (6). The outer shell (1) of the enclosure is also equipped with a control module (10). The control module (10) is connected to the temperature control structure (7), the multi-level setting module (8), and the temperature detection module (9). The control module (10) is configured to control the temperature control structure (7) to adjust the temperature environment inside the storage chamber (6) based on the difference between the target temperature range corresponding to the preset temperature control level selected by the user and the actual temperature detected by the temperature detection module (9), so that the temperature inside the storage chamber (6) approaches the target temperature range corresponding to the preset temperature control level selected by the user. The storage chamber (6) is also provided with a temperature equalization structure (11) for uniformly distributing the temperature field within the storage chamber (6) and reducing the temperature deviation between different locations within the storage chamber (6).

2. The controllable temperature transport and storage device according to claim 1, characterized in that, The temperature equalization structure (11) includes an air guide channel disposed on the inner wall of the inner liner (4), and the air guide channel is provided with a plurality of air outlets (111) for discharging the temperature regulating medium generated by the temperature control structure (7) into the storage chamber (6) and equalizing the temperature field distribution in the storage chamber (6). The temperature equalization structure (11) also includes a circulating fan (112) disposed in the storage chamber (6) for driving the gas circulation flow in the storage chamber (6) to further equalize the temperature distribution in the storage chamber (6). The air guiding channel includes an annular air duct (113) arranged circumferentially along the inner wall of the inner liner (4) and a plurality of longitudinal air ducts (114) arranged along the height direction of the inner wall of the inner liner (4). The annular air duct (113) and the plurality of longitudinal air ducts (114) are interconnected, and the plurality of air outlets (111) are distributed at different height positions of the longitudinal air ducts (114).

3. The controllable temperature transport and storage device according to claim 1, characterized in that, The temperature control structure (7) includes: a cooling component, a heating component, and a baffle component; The refrigeration components include: a compressor (701), a condenser (702), a throttling element (703), and an evaporator (704); The compressor (701) is installed in the equipment mounting cavity (2) at the bottom of the housing (1). The condenser (702) is installed on the outer wall of the housing (1). The throttling element (703) is installed on the pipeline between the outlet of the condenser (702) and the inlet of the evaporator (704). The outlet end of the throttling element (703) is connected to the inlet end of the evaporator (704). The throttling element (703) is either a capillary tube or an expansion valve. The evaporator (704) is located inside the storage chamber (6). The compressor (701), the condenser (702), the throttling element (703), and the evaporator (704) are connected in sequence through pipelines to form a refrigeration cycle loop. The heating component includes: an electric heating element (705) and a heat-conducting plate (706); The electric heating tube (705) is installed on the inner wall surface of the inner liner (4) facing the storage chamber (6) by a fixed bracket, and the electric heating tube (705) is arranged in an S-shaped reciprocating coil. The heat-conducting plate (706) is attached to the surface of the electric heating tube (705) facing the storage chamber (6) to uniformly conduct the heat generated by the electric heating tube (705) to the storage chamber (6). The heat-conducting plate (706) has an inlay groove (707) on the side surface facing the electric heating tube (705) that matches the outer contour of the electric heating tube (705). The electric heating tube (705) is embedded in the inlay groove (707) and fits tightly against the groove wall of the inlay groove (707). The heat-conducting plate (706) is a copper plate. The side surface of the heat-conducting plate (706) facing the storage chamber (6) is a flat radiant heating surface (708).

4. The controllable temperature transport and storage device according to claim 3, characterized in that, The blocking assembly includes: four L-shaped positioning angles (709), a freeing limit block (710), a storage cage (711), and a threaded lifting ring (712); The four L-shaped positioning angles (709) are located at the four corners of the surface of the heat-conducting plate (706) facing the storage chamber (6). The free-standing limiting block (710) is provided at the included angle of the four L-shaped positioning angles (709). The storage cage (711) is suspended above the heat-conducting plate (706) by the free-standing limiting block (710) provided at the included angle of the four L-shaped positioning angles (709). The threaded lifting ring (712) is provided at the four corners of the top of the storage cage (711).

5. The controllable temperature transport and storage device according to claim 3, characterized in that, The refrigeration assembly also includes a variable temperature regulating valve group (713) disposed on the pipeline between the outlet of the condenser (702) and the inlet of the throttling element (703) for regulating the flow rate of refrigerant flowing through the evaporator (704). The variable temperature regulating valve group (713) is an electronic expansion valve or composed of multiple solenoid valves, and the variable temperature regulating valve group (713) is signal connected to the control module (10). The control module (10) changes the cooling capacity of the evaporator (704) by adjusting the opening degree of the variable temperature regulating valve group (713) to realize the continuous adjustment of the storage chamber (6) in a wide temperature range.

6. The controllable temperature transport and storage device according to claim 1, characterized in that, The multi-level setting module (8) includes a storage standard database that stores storage temperature standard information corresponding to at least two types of food, and a level selection interface (801) that has the storage standard database built into it and is set on the outer shell (1) of the box. The at least two food categories include at least fresh food and grains and oils; The gear selection interface (801) is provided with a number of gear selection controls (802) that correspond one-to-one with the at least two food categories.

7. The controllable temperature transport and storage device according to claim 1, characterized in that, The control module (10) includes a temperature difference calculation unit for calculating the real-time temperature difference between the actual temperature and the center temperature of the target temperature range, a PID control unit for generating a temperature control adjustment signal by performing proportional-integral-derivative operations based on the real-time temperature difference, and a drive unit for driving the temperature control structure (7) to perform corresponding temperature adjustment actions based on the temperature control adjustment signal. The PID control unit has multiple sets of preset PID parameters, each set of PID parameters corresponding to different preset temperature control levels. The control module (10) calls the corresponding PID parameter set according to the preset temperature control level currently selected by the user to perform temperature control adjustment.

8. The controllable temperature transport and storage device according to claim 1, characterized in that, The temperature detection module (9) includes multiple temperature sensors (901) distributed at different locations within the storage chamber (6), and the multiple temperature sensors (901) are arranged in an array within the storage chamber (6). The control module (10) is configured to calculate the average temperature and maximum temperature difference in the storage chamber (6) based on the temperature values ​​detected by the plurality of temperature sensors (901). When the maximum temperature difference exceeds a preset threshold, the control module (10) activates the temperature equalization structure (11) to perform temperature equalization adjustment.

9. A controllable temperature-controlled transport and storage device according to claim 1, characterized in that, The outer shell (1) of the box is provided with four corners of the bottom of the box, and a push-pull handle (13) is provided on the side wall of the outer shell (1). The top of the outer shell (1) is provided with an openable lid (14). A sealing strip (15) is provided between the lid (14) and the outer shell (1). The sealing strip (15) is used to seal the storage chamber (6) when the lid (14) is closed. A power interface (16) is also provided on the side wall of the outer shell (1) of the housing. The power interface (16) is used to connect an external power source to supply power to the temperature control structure (7) and the control module (10).

10. A method of using a temperature-controlled transport and storage device, applied to a temperature-controlled transport and storage device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Select the corresponding preset temperature control level on the multi-level setting module (8) according to the food category of the items to be stored. The preset temperature control level includes at least a fresh food preset level suitable for storing fresh agricultural products and a grain and oil preset level suitable for storing grain and oil. S2: The control module (10) retrieves the corresponding target temperature range from the stored standard database according to the selected preset temperature control level; S3: The temperature detection module (9) detects the actual temperature inside the storage chamber (6) in real time and sends the detected actual temperature signal to the control module (10). S4: The control module (10) compares the actual temperature with the target temperature range. When the actual temperature deviates from the target temperature range, the control module (10) controls the temperature control structure (7) to cool or heat the storage chamber (6) until the actual temperature falls within the target temperature range. S5: During the operation of the temperature control structure (7), the control module (10) controls the temperature equalization structure (11) to start or stop according to the temperature deviation at different locations in the storage chamber (6) in order to maintain the uniformity of the temperature field in the storage chamber (6). S6: During transportation or storage, the control module (10) continuously monitors the actual temperature inside the storage chamber (6) and dynamically adjusts the operating status of the temperature control structure (7) so that the temperature inside the storage chamber (6) is always maintained within the target temperature range.

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