Control method of refrigerated cargo compartment and refrigerated cargo compartment

Abstract

The invention provides a control method for a refrigerated cargo compartment and the refrigerated cargo compartment, and the method comprises the steps: dividing to-be-transported cargoes into different temperature control groups according to a target temperature, and calculating the total required volume corresponding to each temperature control group; based on each total demand volume, a partition assembly arranged in the refrigerated cargo compartment is controlled to move in the length direction of the refrigerated cargo compartment; the real-time temperature of each temperature control area is obtained, and the temperature difference value between the real-time temperature and the corresponding target temperature is calculated; and on the basis of each temperature difference value, the corresponding air volume adjusting assembly is adjusted so that each temperature control area can maintain the corresponding target temperature. In the mode, the refrigeration cargo compartment can be automatically divided into a plurality of independent temperature control areas matched with the load according to the actual volume and temperature requirements of cargoes, and therefore the space utilization rate of the refrigeration cargo compartment is increased; and meanwhile, accurate cooling is conducted on all the temperature control areas according to needs through the independent air volume adjusting assemblies, the fresh-keeping quality during mixed loading of the multiple kinds of goods is improved, and refrigeration energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of cold chain logistics technology, and in particular to a control method for a refrigerated cargo compartment and a refrigerated cargo compartment. Background Technology

[0002] In the cold chain logistics transportation sector, to improve delivery efficiency and reduce costs, a refrigerated truck often needs to carry multiple different types of goods simultaneously, such as meat that requires deep freezing and fruits and vegetables that only need low-temperature preservation, and these goods have different storage temperature requirements. To meet the needs of mixed transportation, the interior of the refrigerated cargo compartment usually needs to be divided into multiple independent temperature zones so that the temperature of different types of goods can be controlled separately.

[0003] Existing multi-temperature zone refrigerated trucks typically use fixed partition walls or simple movable baffles that need to be manually inserted into pre-set slots for physical partitioning. The partition positions are relatively fixed and cannot be infinitely adjusted. This structure means that the volume of each temperature zone cannot be flexibly adapted to the actual volume of the goods to be transported, often resulting in insufficient space in one temperature zone while a large amount of space in another temperature zone is idle, leading to wasted space. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a control method for a refrigerated cargo compartment and a refrigerated cargo compartment, which can automatically divide the refrigerated cargo compartment into multiple independent temperature control zones that match the load according to the actual volume and temperature requirements of the goods, thereby improving the space utilization of the refrigerated cargo compartment; at the same time, through independent air volume adjustment components, each temperature control zone is precisely cooled on demand, which improves the preservation quality when multiple goods are mixed and reduced the refrigeration energy consumption.

[0005] In a first aspect, the present invention provides a method for controlling a refrigerated cargo compartment, comprising: Obtain the target temperature and volume of the goods to be transported.

[0006] The goods to be transported are divided into different temperature control groups based on the target temperature, and the total required volume for each temperature control group is calculated.

[0007] Based on each total demand volume, the partition components installed inside the refrigerated compartment are controlled to move along the length of the refrigerated compartment to form multiple temperature-controlled zones within the refrigerated compartment that match each total demand volume.

[0008] Obtain the real-time temperature of each temperature control zone, and calculate the temperature difference between each real-time temperature and the corresponding target temperature.

[0009] Based on the temperature difference of each temperature control zone, the airflow adjustment component of the corresponding temperature control zone is adjusted to maintain the target temperature of each temperature control zone.

[0010] In an optional implementation, the steps of dividing the goods to be transported into different temperature control groups based on the target temperature and calculating the total required volume for each temperature control group include: Goods to be transported that have the same target temperature, or whose absolute temperature difference between two target temperatures is within a preset range, are grouped into the same temperature control group.

[0011] Collect the individual volume of each item to be transported in each temperature control group, and sum them up to obtain the initial volume.

[0012] The initial volume is corrected based on the preset loading compression compensation coefficient, and the total required volume for each temperature control group is calculated.

[0013] In optional implementations, the partition assembly adopts a roller blind structure or a folding screen structure.

[0014] Based on each total required volume, the steps of controlling the movement of the partition components installed inside the refrigerated compartment along the length of the refrigerated compartment include: Calculate the target position coordinates of the partition component along the length of the refrigerated cargo compartment based on the cross-sectional area and total required volume of the refrigerated cargo compartment.

[0015] The drive partition assembly moves along the guide rails set on the top of the refrigerated compartment, and the current position coordinates of the partition assembly are monitored in real time.

[0016] Stop driving the partition component when the current position coordinates match the target position coordinates.

[0017] Control the roller shutter structure to perform a lowering operation, or control the folding screen structure to perform an unfolding operation, so that the edge of the partition component makes physical contact with the inner wall of the refrigerated compartment.

[0018] In an optional embodiment, the edge of the partition assembly is provided with an inflatable sealing mechanism.

[0019] Prior to the step of moving the drive partition assembly along a guide rail located on the top of the refrigerated cargo compartment, the method further includes: Control the inflatable sealing mechanism to perform the venting action and monitor the air pressure status of the inflatable sealing mechanism.

[0020] When it is confirmed that the inflatable sealing mechanism is in the retracted state, the partition assembly is driven.

[0021] After controlling the roller blind structure to perform a lowering operation, or controlling the folding screen structure to perform an unfolding operation, the method further includes: Control the inflatable sealing mechanism to perform the inflation action until the edge of the partition component is tightly fitted against the inner wall of the refrigerated compartment.

[0022] In an optional implementation, the airflow regulating component includes a supply air damper and a return air damper corresponding to each temperature control zone.

[0023] The steps for adjusting the airflow control components for each temperature control zone based on the temperature difference include: Obtain the preset air supply and return air linkage control strategy.

[0024] Based on the temperature difference, the first target opening of the supply air damper and the second target opening of the return air damper are calculated using a linkage control strategy.

[0025] The supply air damper and return air damper corresponding to the temperature control zone are controlled to operate synchronously to achieve the first target opening degree and the second target opening degree respectively.

[0026] In an optional implementation, the step of adjusting the airflow regulating components for the corresponding temperature control zones includes: Identify the cooling demand status of each temperature control zone.

[0027] When the total required volume of any temperature control zone is identified as zero, or when the temperature control zone is marked as not requiring cooling, the supply air damper and return air damper corresponding to the temperature control zone are completely closed.

[0028] In an optional implementation, the step of adjusting the airflow regulating components for the corresponding temperature control zones includes: Real-time monitoring of the rate of temperature change in each temperature-controlled zone.

[0029] When the rate of change exceeds the preset safety rate threshold and the real-time temperature has not yet reached the target temperature, a correction command is generated to reduce the opening of the supply air damper and the return air damper.

[0030] In an optional implementation, after obtaining the real-time temperature of each temperature control zone and calculating the temperature difference between each real-time temperature and the corresponding target temperature, the method further includes: Obtain the temperature difference for each temperature-controlled zone and calculate the current overall cooling demand.

[0031] Adjust the output power of the refrigeration unit according to the overall cooling demand.

[0032] In an optional implementation, a temperature sensor is installed at the return air vent corresponding to each temperature control zone of the refrigerated compartment; the step of acquiring the real-time temperature of each temperature control zone includes: Temperature sensors are used to collect the real-time temperature of the air flowing out of the return air vent in each temperature-controlled zone.

[0033] In an optional implementation, the steps of obtaining the target temperature and volume of the goods to be transported include: The system receives information about the type of goods and their corresponding volume from the user through a human-computer interaction interface.

[0034] The optimal storage temperature is matched to the preset cargo attribute database based on the cargo type information, and then used as the target temperature.

[0035] In a second aspect, the present invention provides a refrigerated cargo compartment, including a cargo compartment body, a controller, and a partition assembly, an air volume regulating assembly, a sensor assembly, and a refrigeration unit respectively connected to the controller; the controller is used to execute the control method of the refrigerated cargo compartment according to any of the foregoing embodiments.

[0036] The refrigeration unit is located inside the cargo compartment.

[0037] The partition assembly is movably installed within the cargo compartment to divide the refrigerated cargo compartment into at least two temperature-controlled zones.

[0038] The air volume regulation component includes supply air dampers and return air dampers for each temperature control zone.

[0039] In an optional embodiment, the partition assembly includes a guide rail mounted on the top of the cargo box body; the partition assembly adopts a roller shutter structure or a folding screen structure.

[0040] The partition assembly has an inflatable sealing mechanism on its edge.

[0041] The refrigerated compartment also includes an air pump, which is connected to a controller and used to inflate the inflatable sealing mechanism.

[0042] This application provides a control method and a refrigerated cargo compartment. By automatically calculating the grouped volume based on the target temperature and volume of the goods and controlling the movement of the partition components along the length direction to construct a matching temperature control zone, combined with the automatic inflation and deflation coordination of the inflatable sealing mechanism and the fine adjustment of the supply and return air dampers based on temperature difference, the internal space of the refrigerated cargo compartment can be flexibly and dynamically divided, the thermal isolation between each temperature zone can be reliably achieved, and the temperature control can be independent and precise. This improves space utilization and meets the needs of multi-temperature zone mixed loading transportation, while reducing the overall energy consumption of the machine and realizing the intelligence and efficiency of refrigerated transportation.

[0043] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application are realized and obtained through the structures particularly pointed out in the description, claims and drawings.

[0044] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0046] Figure 1 A flowchart illustrating the control method for a refrigerated cargo compartment provided in an embodiment of this application; Figure 2 A flowchart illustrating the method for calculating the total required volume provided in this application embodiment; Figure 3 A flowchart illustrating the control method for the partition component provided in this application embodiment; Figure 4 A flowchart illustrating the control method for the airflow regulating component provided in this application embodiment; Figure 5 A schematic diagram of a refrigerated cargo compartment provided in an embodiment of this application.

[0047] Diagram: 1-Cargo box body; 2-Controller; 3-Partition assembly; 5-Sensor assembly; 6-Refrigeration unit; 41-Supply air damper; 42-Return air damper. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] To help those skilled in the art better understand this application, the application scenarios and design concepts of this application are briefly introduced below.

[0050] In existing cold chain logistics transportation scenarios, to meet the mixed-carriage needs of different types of goods (such as frozen meat requiring a -18°C environment and fresh fruits and vegetables requiring a 5°C environment), it is usually necessary to divide the refrigerated cargo compartment into different temperature zones. However, existing multi-temperature zone refrigerated trucks generally have the following technical problems: First, the partition structure is rigid, resulting in low space utilization. Existing partitions are usually fixed or can only be adjusted manually by inserting the baffles into a few pre-set slots. This method cannot accurately match the actual volume of various goods in each transportation task, often resulting in insufficient temperature zone space for high-demand goods, while a large amount of temperature zone space for low-demand goods is idle, causing a great waste of cargo loading capacity.

[0051] Secondly, insufficient temperature control precision easily leads to dead zones in airflow. Traditional refrigerated trucks often use a single main air vent or lack a refined airflow distribution mechanism for each independent zone. This results in uneven distribution of cold air within the compartment, with hot spots easily forming in areas far from the air vent. Furthermore, they typically rely on a single sensor for feedback, failing to accurately reflect the actual return air temperature of each zone, making it difficult to guarantee the constant temperature environment required for the goods.

[0052] Finally, the sealing and energy-saving effects are poor. Simple movable baffles often have poor sealing performance, leading to temperature cross-contamination between adjacent temperature zones. Furthermore, when some temperature zones are idle, the system lacks effective isolation measures, causing the refrigeration unit to still provide ineffective cooling to the vacant areas, increasing the overall vehicle energy consumption.

[0053] Based on this, this application proposes a control method and a refrigerated cargo compartment. The method automatically calculates and drives the partition components to move to the optimal position along the length of the compartment based on the volume and target temperature of the goods to be transported. This achieves stepless adjustment and on-demand allocation of temperature zone volumes, thereby maximizing the loading rate and space utilization of the refrigerated cargo compartment. Simultaneously, by configuring independent airflow adjustment components and return air temperature sensors for each divided temperature zone, independent closed-loop control of each zone can be achieved. Combined with the coordinated adjustment of supply and return air, not only are dead zones eliminated, but the accuracy of temperature detection is also ensured.

[0054] To facilitate understanding of this embodiment, the embodiments of this application will be described in detail below.

[0055] This application provides a control method for a refrigerated cargo compartment, referring to... Figure 1 Control methods for refrigerated cargo compartments include: Step S101: Obtain the target temperature and volume of the goods to be transported.

[0056] Here, user input can be directly received through the human-machine interface (such as a touchscreen or tablet in the driver's cab) of the refrigerated cargo compartment. Users can select the type of goods (e.g., frozen pork, flowers, or medicine) on the interface, and the system will automatically match the optimal storage temperature for that type as the target temperature based on a preset database. Users can also manually input specific temperature values. For cargo volume, users can directly input the cubic volume, or input the packaging specifications and number of pieces, and the system will automatically calculate the total volume.

[0057] In another implementation, the acquisition process can be completed automatically via wireless communication. For example, when a refrigerated truck arrives at a logistics warehousing center for loading, the system directly receives an electronic waybill sent by the logistics management system through the vehicle communication module. The waybill contains a list of all goods to be loaded, temperature requirements, and volume / weight information.

[0058] In addition, information can also be obtained through scanning and identification technologies. For example, electronic information on cargo tags can be identified using handheld barcode scanners or RFID (Radio Frequency Identification) readers at the entrance of the carriage, allowing the system to analyze target temperature and volume parameters. If only weight information is obtained, the system can also estimate the volume of the cargo by combining it with the cargo's density coefficient.

[0059] Step S102: Divide the goods to be transported into different temperature control groups according to the target temperature, and calculate the total required volume for each temperature control group.

[0060] Here, when dividing temperature control groups, the system can not only group goods with the same target temperature together, but also use fuzzy matching or range matching strategies. For example, a preset temperature difference range (e.g., ±2℃) can be set. As long as the target temperature difference between different goods falls within this range and their storage characteristics allow for mixed storage, they can be grouped into the same temperature control group, reducing the number of unnecessary partitions and improving space utilization. Conversely, if the temperature difference exceeds the preset range, or if the properties of the goods conflict (e.g., goods that emit ethylene and goods that are sensitive to ethylene), they must be divided into different temperature control groups.

[0061] When calculating the total required volume, the individual volumes of all goods within the same temperature control group are summed. To ensure sufficient air circulation clearance after loading, a loading compression compensation factor or air duct allowance factor (e.g., a redundancy factor of 1.1) is usually introduced during the calculation to correct the summed volume, thus obtaining the final total required volume.

[0062] Step S103: Based on each total demand volume, control the partition components installed inside the refrigerated compartment to move along the length of the refrigerated compartment to form multiple temperature control zones inside the refrigerated compartment that match each total demand volume.

[0063] Here, volume is converted into position coordinates. Given that the cross-sectional area of ​​the refrigerated cargo compartment is fixed, the target position coordinates where the partition component should reside along the length of the cargo compartment are calculated based on the total required volume.

[0064] The controller drives the partition assembly to move. The specific structural forms of the partition assembly vary widely. 1. Roller blind structure: The partition assembly includes a roller mechanism mounted at the top and a flexible, heat-insulating curtain. During movement, the roller mechanism slides horizontally along the top guide rail. Once in position, the motor releases the curtain to the bottom, forming a soft barrier.

[0065] 2. Folding screen structure: The partition is made of multiple rigid heat-insulating panels hinged together, and can be folded for storage when not in use. When moved into place, a motor drives it to unfold, forming a rigid partition.

[0066] 3. Rigid push plate structure: The partition is a single heat insulation plate that matches the cross-section of the cargo box, and it is directly pushed and moved by a screw, belt or hydraulic mechanism.

[0067] During the movement and formation of the enclosed space, partition components are typically equipped with enhanced sealing mechanisms to ensure airtightness and prevent the exchange of hot and cold air. For example, inflatable sealing strips are installed at the partition edges. As the partition moves, the sealing strip deflates and contracts to avoid friction. Once the partition is in place, an air pump inflates the sealing strip, causing it to expand and press tightly against the inner wall of the cargo compartment. Alternatively, magnetic sealing strips or mechanically pressed rubber strips can also be used to achieve edge sealing.

[0068] Step S104: Obtain the real-time temperature of each temperature control zone, and calculate the temperature difference between each real-time temperature and the corresponding target temperature.

[0069] In one embodiment, a temperature sensor is installed at the return air vent of each temperature-controlled zone, and the return air temperature represents the state of the airflow after heat exchange with the goods.

[0070] In other implementations, multiple temperature acquisition points can be arranged on the side walls, top, or inside the cargo of the temperature-controlled area (via wireless probes), and the real-time temperature of the area can be calculated using a weighted average algorithm.

[0071] When calculating the temperature difference, the target temperature is typically subtracted from the real-time temperature. If the difference is positive and exceeds a threshold, cooling is needed. If the difference is negative, the temperature is too low, and cooling may need to be stopped or defrosting may be required. The rate of change of the temperature difference can also be calculated to predict temperature trends.

[0072] Step S105: Based on the temperature difference of each temperature control zone, adjust the airflow adjustment component of the corresponding temperature control zone to maintain the target temperature of each temperature control zone.

[0073] Here, the airflow regulating component refers to the actuator capable of altering the flow rate of cold air entering the temperature-controlled zone. Specific forms include, but are not limited to: 1. Electric damper: Installed at the openings of the main air supply duct in corresponding areas, it can be a louvered type, butterfly valve type, or sliding type. The opening angle (degree of opening) of the damper is linearly adjusted by a stepper motor according to the temperature difference.

[0074] 2. Venturi duct air outlet: The air outlet is designed with a Venturi structure. By adjusting the flow rate at the throat, the ejection ratio is changed, thereby delivering cooling capacity while using negative pressure to drive the air in the area to mix quickly and eliminate dead zones.

[0075] 3. Independent fans: Each zone is equipped with an independent circulating fan, and the air volume is controlled by adjusting the fan speed.

[0076] The supply and return air are controlled in tandem. For example, when a temperature-controlled zone requires maximum cooling, both the supply and return air dampers for that zone open fully simultaneously. As the temperature approaches the target value, both dampers reduce their opening synchronously. When the temperature-controlled zone is empty or requires no cooling, both dampers close completely, physically disconnecting the zone from the air circulation system to save energy.

[0077] Furthermore, the adjustment process can employ PID (Proportional-Integral-Derivative) control algorithms, fuzzy control algorithms, or overshoot prevention control strategies. For example, when excessively rapid cooling (excessive rate of temperature change) is detected, even if the current temperature has not yet reached the target value, the opening of the airflow adjustment component will be reduced in advance, utilizing the inertia of the cooling capacity to slowly approach the target temperature and prevent damage to the goods from freezing. For systems equipped with variable frequency refrigeration units, the operating frequency of the refrigeration compressor can also be synchronously adjusted based on the total temperature difference requirements of all zones.

[0078] In one embodiment, reference is made to Figure 2 Step S102 includes the following steps S201-S203.

[0079] Step S201: The goods to be transported that have the same target temperature or whose absolute temperature difference between two target temperatures is within a preset range are divided into the same temperature control group.

[0080] Here, the target temperature data for all goods to be transported is read.

[0081] Goods with identical target temperature values ​​are grouped into the same temperature control group. For example, several batches of frozen beef that all require storage at -18°C are processed together.

[0082] Considering that some goods have a certain temperature compatibility range during actual transportation, a temperature difference tolerance range (e.g., ±3°C) can be preset. When the target temperatures of two batches of goods are not exactly the same, but the absolute value of their temperature difference is within the preset range (e.g., one batch of goods requires -18°C, another batch requires -20°C, and both can be stored in an environment between -18°C and -20°C), they are classified into the same temperature control group. In this case, the final set temperature of the temperature control group can be the lowest or average value of the two values ​​to ensure that the preservation requirements of all goods are met.

[0083] In addition to temperature factors, the compatibility of cargo attributes can also be considered when classifying temperature control groups. Even if two batches of goods have the same temperature requirements, if one batch releases ethylene (such as apples and bananas), while the other batch is sensitive to ethylene (such as leafy green vegetables), or there is a risk of cross-contamination of flavors (such as durian and seafood), they will be forcibly classified into different temperature control groups to ensure cargo quality.

[0084] For goods whose absolute temperature difference exceeds the preset range (e.g., goods A require 2°C, goods B require -18°C), they will be strictly divided into different temperature control groups and subsequently isolated by physical barriers.

[0085] Step S202: Collect the individual volume of each item to be transported in each temperature control group and sum them up to obtain the initial volume.

[0086] Here, the unit volume can be entered by the user directly into the interface, specifying the length, width, height, and quantity of each item, or retrieved from the backend database by scanning the item's barcode / RFID tag.

[0087] Iterate through all the goods lists within the same temperature control group, multiply the individual volume of each item by its quantity, and then sum the volume values ​​of all items to obtain the initial volume of the temperature control group. The initial volume represents the pure physical volume of the goods in a tightly stacked state.

[0088] Step S203: Correct the initial volume based on the preset loading compression compensation coefficient, and calculate the total required volume for each temperature control group.

[0089] Here, because in actual cold chain loading, goods cannot be stacked completely without gaps, and air duct space for cold air circulation must be reserved, the initial volume is corrected based on the loading compression compensation coefficient.

[0090] The preset load compression compensation factor is typically greater than 1 (e.g., 1.1 to 1.3). The preset load compression compensation factor takes into account the following factors: 1. Stacking gap: The natural gaps between cargo boxes and the space occupied by pallets.

[0091] 2. Circulating air duct design: To ensure that cold air can flow smoothly from the top air supply vent to the bottom air return vent, air circulation layers must be reserved on the top, sides, and bottom of the goods. Especially for designs using Venturi air supply vents and bottom air return structures, sufficient airflow circulation paths are key to preventing dead air zones and ensuring temperature uniformity.

[0092] 3. Operating margin: The space reserved for loading and unloading workers to carry out handling operations at the edge of the partition.

[0093] The calculation formula is: Total required volume = Initial volume × Loading compression compensation coefficient.

[0094] With this correction, the calculated total required volume includes not only the volume of the goods themselves, but also the necessary air duct space. This ensures that the formed temperature-controlled area can accommodate all the goods while maintaining a good cold air circulation flow field, avoiding problems such as obstructed return air or local overheating due to insufficient space.

[0095] In one embodiment, the partition assembly adopts a roller blind structure or a folding screen structure.

[0096] Reference Figure 3 Step S103 includes the following steps S301-S304.

[0097] Step S301: Calculate the target position coordinates of the partition component along the length of the refrigerated cargo compartment based on the cross-sectional area and total required volume of the refrigerated cargo compartment.

[0098] Here, the internal cross-sectional area of ​​the refrigerated cargo compartment is usually a known, fixed value. The cross-sectional area parameters of the refrigerated cargo compartment are pre-stored. After calculating the total required volume of a certain temperature control unit, the required compartment length for that temperature control unit is calculated using the formula: Length = Total Required Volume / Cross-sectional Area.

[0099] Subsequently, based on the spatial coordinate system established by the refrigerated cargo compartment (e.g., with the inner wall at the front of the compartment as the origin), the calculated length value is mapped to the target position coordinates of the partition component on the guide rail. This coordinate value represents the precise position where the partition component should stop, thereby achieving stepless adjustment of the partition volume and ensuring a precise match between the physical space and the cargo volume.

[0100] In step S302, the partition assembly is driven to move along the guide rail set on the top of the refrigerated compartment, and the current position coordinates of the partition assembly are monitored in real time.

[0101] In the specific structural implementation, the partition assembly is suspended in the guide rails on the top of the refrigerated compartment via a moving mechanism. The moving mechanism typically includes a first drive motor (such as a stepper motor or servo motor) and transmission components (such as gears and racks, synchronous belts, or lead screws).

[0102] A running command is sent to the first drive motor, which drives the entire partition assembly to move back and forth along the guide rails along the length of the refrigerated cargo compartment. Simultaneously, a position feedback device monitors the current position of the partition assembly in real time. This position feedback device can be a rotary encoder mounted on the motor shaft, which determines the displacement by calculating the number of pulses. Alternatively, it can be a laser rangefinder, ultrasonic sensor, or linear displacement sensor mounted on the guide rails or the cargo compartment wall, which directly reads the absolute position coordinates of the partition assembly and feeds the data back to the controller in real time.

[0103] Step S303: When the current position coordinates are consistent with the target position coordinates, stop driving the partition component.

[0104] Here, the received current position coordinates are continuously compared with the calculated target position coordinates. To prevent overshoot caused by mechanical inertia, the controller can employ a PID control algorithm or a segmented speed control strategy. When the partition component is far from the target position, it operates at high speed. When approaching the target position, it automatically reduces its movement speed and enters crawling mode.

[0105] Once the deviation between the current position coordinates and the target position coordinates is detected to be within the allowable error range (e.g., ±1 mm), the power supply to the first drive motor is immediately cut off or a braking signal is sent to make the isolation component stop smoothly and accurately at the target position.

[0106] Step S304: Control the roller shutter structure to perform a lowering operation, or control the folding screen structure to perform an unfolding operation, so that the edge of the partition component makes physical contact with the inner wall of the refrigerated compartment.

[0107] In one embodiment, if the partition assembly adopts a roller shutter structure, it mainly includes a roller mechanism and a flexible thermal insulation curtain wound on the roller. The flexible thermal insulation curtain is preferably made of a composite insulation material, such as an antibacterial fabric layer, a nano-aerogel insulation layer, and an aluminum foil reflective layer, which provides excellent thermal insulation performance while ensuring lightweight design.

[0108] Once the partition assembly stops moving, the second drive motor (roller blind motor) is controlled to rotate forward, causing the roller to rotate and releasing the flexible heat-insulating curtain. The curtain descends vertically under the action of gravity or a guide mechanism until its bottom end contacts the floor of the refrigerated compartment.

[0109] In another embodiment, if the partition component adopts a folding screen structure, it is composed of multiple rigid or semi-rigid heat insulation panels connected by hinges, and is folded at the top or side when stored.

[0110] Once the partition components stop moving, the control unfolding mechanism (such as an electric push rod or cylinder) is activated, driving the folded insulation panels to unfold along a preset trajectory until a complete insulation wall is formed.

[0111] By establishing initial physical contact between the partition components and the inner walls of the refrigerated compartment, the refrigerated compartment is physically divided into independent temperature-controlled zones at the front and rear.

[0112] In one embodiment, the edge of the partition assembly is provided with an inflatable sealing mechanism.

[0113] Before step S302, the method further includes the following steps S401-S402.

[0114] Step S401: Control the inflatable sealing mechanism to perform the venting action and monitor the air pressure status of the inflatable sealing mechanism.

[0115] Here, in order to ensure that the partition components can move smoothly inside the refrigerated compartment and to avoid damage caused by severe friction between the sealing components and the inner wall of the compartment, it is necessary to remove the seal.

[0116] Specifically, an inflatable sealing mechanism typically includes a hollow sealing strip embedded around the perimeter of the partition assembly (including the top, bottom, and sides), and an air passage system (including an air pump and an exhaust valve) connected to the hollow sealing strip.

[0117] Upon receiving a command to move the partition, the system first controls the exhaust valve of the air circuit system to open, or controls the air pump to perform a suction operation to expel the gas inside the hollow sealing strip. Simultaneously, a pressure sensor monitors the air pressure inside the hollow sealing strip in real time, or a time relay monitors the exhaust duration to determine the progress of the exhaust process.

[0118] Step S402: When it is confirmed that the inflatable sealing mechanism is in the retracted state, drive the partition assembly.

[0119] Here, the real-time monitored air pressure value is compared with the preset safe low-pressure threshold. Only when the air pressure value is lower than the safe low-pressure threshold, confirming that the hollow sealing strip has fully contracted and deflated, and that there is sufficient clearance between it and the inner wall of the refrigerated compartment, will a start signal be sent to the drive motor of the partition component, driving the partition component to move along the guide rail.

[0120] If the air pressure is detected to be below the safe range, the drive motor will be prohibited from starting and a fault alarm will be issued, thereby effectively preventing the risk of rubber tearing or motor overload caused by forced movement due to the sealing strip not being fully retracted.

[0121] Following step S304, the method further includes: Control the inflatable sealing mechanism to perform the inflation action until the edge of the partition component is tightly fitted against the inner wall of the refrigerated compartment.

[0122] Here, once the partition assembly has moved to the target position and its main structure (roller shutter or folding screen) has been fully deployed and covers the cross-section of the refrigerated compartment, a small air pump is activated. The air pump injects compressed air into the hollow sealing strip at the edge of the partition assembly.

[0123] As the air pressure increases, the hollow sealing strip expands elastically, automatically filling the gaps between the edge of the partition component and the inner walls (including the side walls, top walls, and floor) of the refrigerated cargo compartment. This inflatable design can adapt to any minor deformations or unevenness that may exist on the inner walls of the refrigerated cargo compartment, using the flexible clamping force generated by air pressure to achieve a comprehensive, seamless sealing effect.

[0124] The system continuously monitors the inflation pressure. When the pressure reaches the preset working pressure, the air pump automatically stops and the pressure holding valve closes, ensuring that air cannot convect between the two temperature control zones, thereby completely blocking heat transfer and ensuring independent temperature control for each zone.

[0125] In one embodiment, the airflow regulating component includes a supply air damper and a return air damper corresponding to each temperature control zone.

[0126] Here, the airflow regulation system employs a distributed, independent control architecture. Each temperature-controlled zone, divided by partitions, is equipped with its own dedicated airflow regulation system. The airflow regulation system includes an air supply damper located on the main air supply duct at the top of the refrigerated cargo compartment and a return air damper located on the independent return air duct at the bottom of the refrigerated cargo compartment.

[0127] Preferably, the air supply damper is not a simple on / off valve, but rather a louvered structure driven by a stepper motor, enabling stepless adjustment of the blade angle and thus linear, precise control of the air supply volume. Furthermore, to further enhance the air supply effect, the air outlet where the damper is located can be designed as a Venturi tube (converging and expanding tube). This structure utilizes the negative pressure generated by the velocity change of the airflow as it passes through the throat to efficiently draw air into the temperature control area, promoting rapid mixing of cool air and warm air within the area and avoiding dead zones in the air supply.

[0128] Reference Figure 4 Step S105 includes the following steps S501-S503.

[0129] Step S501: Obtain the preset air supply and return air linkage control strategy.

[0130] Here, the linkage control strategy not only includes the basic logic of both opening or closing simultaneously, but also includes an opening matching curve based on hydrodynamic characteristics. For example, the strategy can stipulate that when the supply air damper opening is X, the return air damper should be adjusted to the corresponding opening Y to maintain the positive or negative pressure balance in the temperature control area, ensuring that the cold airflow can circulate completely over the surface of the goods according to the preset path (usually top supply and bottom return), rather than forming eddies in a local area.

[0131] Step S502: Based on the temperature difference, calculate the first target opening of the supply air damper and the second target opening of the return air damper using the linkage control strategy.

[0132] Here, the required airflow is determined based on the temperature difference between the real-time temperature and the target temperature, combined with a PID control algorithm or a fuzzy control algorithm.

[0133] If the temperature difference is large (e.g., when cooling begins or hot goods are placed in), a larger first target opening (e.g., 100% fully open) and a larger second target opening are calculated based on the linkage control strategy to achieve rapid cooling.

[0134] If the temperature difference is small (e.g., close to the target temperature), in order to prevent temperature overshoot (i.e., the temperature drops too quickly and falls below the target value), a smaller first target opening (e.g., 20% opening) and a corresponding second target opening are calculated. The louver angle is then finely adjusted by a stepper motor to deliver only the small amount of cold air needed to maintain the low temperature.

[0135] The first target opening and the second target opening can be the same value, or they can be different values ​​calculated based on the duct resistance characteristics, but the trend of change of the two is consistent.

[0136] Step S503: Control the supply air damper and return air damper corresponding to the temperature control zone to operate synchronously, so as to achieve the first target opening degree and the second target opening degree respectively.

[0137] Here, during normal temperature control, the supply air damper and the return air damper work together.

[0138] In one embodiment, step S105, which involves adjusting the airflow adjustment components of the corresponding temperature control zones, includes the following steps S601-S602.

[0139] Step S601: Identify the cooling demand status of each temperature control zone.

[0140] Here, if the total required volume for a certain temperature-controlled area is zero, it usually means that the temperature-controlled area has been planned as an invalid space, or that the partition components have been moved to the front or rear of the cargo compartment, causing the physical volume of the area to be compressed to the point of disappearing.

[0141] The system reads the user's settings on the human-machine interface. In actual transportation scenarios, sometimes although there is space in a certain area of ​​the cargo compartment and goods are loaded, these goods may be ordinary dry goods that do not require refrigeration (such as packaging materials, empty pallets, or room-temperature food). In this case, the user will mark the temperature-controlled area as not requiring refrigeration or in room-temperature mode. Upon recognizing this mark, it is determined that there is no need for active refrigeration in that area.

[0142] Step S602: When the total required volume of any temperature control zone is identified as zero, or the temperature control zone is marked as not requiring cooling, the supply air damper and return air damper corresponding to the temperature control zone are completely closed.

[0143] Here, when it is determined that a certain temperature control zone does not require cooling, a forced shutdown signal is sent to the corresponding supply air damper actuator and return air damper actuator for that temperature control zone.

[0144] An actuator (such as a stepper motor) drives the damper blades to rotate to the 0-degree fully closed position, cutting off the airflow passage between the temperature control zone and the main supply and return air ducts.

[0145] In one embodiment, step S105, which involves adjusting the airflow adjustment components of the corresponding temperature control zones, includes the following steps S701-S702.

[0146] Step S701: Real-time detection of the rate of temperature change in each temperature control zone.

[0147] Here, the temperature sensor value located at the return air vent of the temperature control area is read at a preset high sampling frequency (e.g., once per second or once every few seconds).

[0148] Calculate the difference between the current real-time temperature and the historical temperature from the previous moment or a period of time in the past, and divide the difference by the time interval to obtain the current rate of temperature change.

[0149] The rate of temperature change reflects how quickly the temperature-controlled area cools or heats up. For example, when the refrigeration unit is running at full power and the dampers are fully open, the absolute value of the rate of temperature change may be very large if the temperature-controlled area is small or the heat capacity of the goods is small.

[0150] Step S702: When the rate of change exceeds the preset safety rate threshold and the real-time temperature has not yet reached the target temperature, a correction command is generated to reduce the opening of the supply air damper and the return air damper.

[0151] In actual cold chain transportation, especially for temperature-sensitive fresh products (such as leafy green vegetables, fresh flowers, or certain pharmaceuticals), if the cooling rate is too fast, although it can quickly approach the target temperature, it often has two negative consequences: First, because the cold air temperature is usually much lower than the target temperature, excessive cold air velocity can easily cause frost damage to the surface of goods near the air outlet; second, due to the existence of thermal inertia, when the sensor detects that the target temperature has been reached and closes the air damper, the remaining cooling capacity will cause the temperature inside the compartment to continue to drop, causing the actual temperature to fall below the target lower limit.

[0152] To avoid the above situation, the real-time calculated rate of change is compared with the preset safe rate threshold.

[0153] When the current cooling rate is detected to be too fast (exceeding the safe rate threshold), even if the real-time temperature of the temperature control area has not yet reached the target temperature (i.e. there is still a positive temperature difference, and according to normal logic, it should continue to cool at full speed), it is determined that there is a risk of overshoot or cold damage, thereby triggering the forced intervention logic.

[0154] A correction command is generated, which has a higher priority than regular PID control, and is used to forcibly reduce the opening of the supply and return air dampers. For example, the damper opening, which was originally 100% fully open, is linearly reduced to 50% or lower.

[0155] By actively limiting the flow of cold air, the cooling rate of the temperature-controlled area is artificially reduced, allowing the temperature curve to approach the target temperature with a gentler and more gradual slope.

[0156] In one embodiment, after step S104, the method further includes the following steps S801-S802.

[0157] Step S801: Obtain the temperature difference of each temperature control zone and calculate the current overall cooling demand.

[0158] In a scenario where multiple temperature zones operate in parallel, adjusting only the airflow control component can balance the distribution of cooling capacity in each zone. However, if the refrigeration unit always operates at a constant high power while the dampers close slightly due to the smaller temperature difference, cooling capacity will accumulate in the pipes, causing evaporator frosting or frequent compressor start-stop cycles, resulting in energy waste.

[0159] Therefore, it's crucial not only to monitor the temperature difference within individual temperature-controlled zones but also to aggregate data from all zones. Real-time collection of the temperature difference and corresponding damper opening feedback for each zone is essential. Using a weighted algorithm (e.g., higher weight for larger temperature differences and larger volumes), the total cooling load required by the entire vehicle at the current moment, i.e., the overall cooling demand, is calculated. For example, when all zones have large temperature differences, the overall cooling demand is 100%. When some zones have reached their target temperature and entered a heat preservation state, leaving only a small zone requiring cooling, the overall cooling demand may drop to 30%.

[0160] Step S802: Adjust the output power of the refrigeration unit according to the overall cooling demand.

[0161] Here, adjustment commands are sent to the refrigeration unit based on the calculated overall cooling demand.

[0162] For refrigeration units using variable frequency compressors, the compressor's operating frequency is directly adjusted. For independent units driven by an engine, the engine speed is adjusted.

[0163] When the overall cooling demand is high, the refrigeration unit operates at full speed, outputting maximum cooling capacity. When the overall cooling demand decreases, the refrigeration unit automatically reduces its power output.

[0164] In one embodiment, a temperature sensor is installed at the return air vent corresponding to each temperature control zone of the refrigerated compartment.

[0165] Step S104, the step of obtaining the real-time temperature of each temperature control zone, includes: Temperature sensors are used to collect the real-time temperature of the air flowing out of the return air vent in each temperature-controlled zone.

[0166] Here, temperature sensors are installed at the return air vents of each temperature-controlled zone. The return air vents are the necessary pathways for cold air to flow back to the refrigeration system after heat exchange with the surface of the goods. Collecting the return air temperature means detecting the temperature of the air that has just carried away the heat from the goods, which is usually the temperature of the highest (hottest) point in that temperature-controlled zone.

[0167] In one embodiment, step S101 includes the following steps S901-S902.

[0168] Step S901: Receive the cargo type information and corresponding cargo volume input by the user through the human-computer interaction interface.

[0169] Here, drivers or operators do not need professional knowledge of refrigeration parameter settings, nor do they need to manually calculate partition positions. They only need to select the name of the currently loaded goods (such as ice cream, fresh meat, leafy greens) through a drop-down menu or voice input on the touch screen or control panel in the cab, and enter the volume data (or number of boxes, specifications) of the batch of goods. This simplified input method greatly lowers the operating threshold and reduces the possibility of human error.

[0170] Step S902: Match the optimal storage temperature in the preset cargo attribute database according to the cargo type information, and use the optimal storage temperature as the target temperature.

[0171] Here, the cargo attribute database contains common cold chain goods and their corresponding national standards or industry recommended storage temperatures (e.g., frozen food corresponds to -18℃, chilled meat corresponds to 0-4℃, bananas correspond to 13℃, etc.).

[0172] Upon receiving the type of goods information input by the user, the system automatically retrieves the corresponding optimal storage temperature from the database and sets it directly as the target temperature for that temperature control group.

[0173] Based on the above embodiments, this application provides a refrigerated cargo compartment, referring to... Figure 5 The refrigerated compartment includes: compartment body 1, controller 2, and partition assembly 3, air volume adjustment assembly, sensor assembly 5 and refrigeration unit 6 respectively connected to controller 2; controller 2 is used to execute the aforementioned control method of refrigerated compartment.

[0174] The refrigeration unit 6 is installed inside the cargo box body 1.

[0175] The partition component 3 is movably installed inside the cargo compartment body 1 to divide the refrigerated cargo compartment into at least two temperature-controlled zones.

[0176] The air volume regulation component includes a supply air damper 41 and a return air damper 42, which are provided for each temperature control zone.

[0177] In one embodiment, the partition assembly 3 includes a guide rail mounted on the top of the cargo box body 1; the partition assembly 3 adopts a roller shutter structure or a folding screen structure.

[0178] An inflatable sealing mechanism is provided on the edge of the partition component 3.

[0179] The refrigerated compartment also includes an air pump, which is connected to controller 2 and is used to inflate the inflatable sealing mechanism.

[0180] Here, the cargo compartment body 1 forms an enclosed cargo loading space, and its side walls, top walls, and floor are all made of high-insulation-performance thermal insulation panels. The refrigeration unit 6 is located at the front end of the cargo compartment body 1, and its evaporator outlet supplies cold energy into the cargo compartment. The controller 2 establishes electrical connections with the refrigeration unit 6, the partition assembly 3, the airflow regulation assembly, the sensor assembly 5, and the air pump via cables or a bus (such as a CAN bus) to achieve signal transmission and command control.

[0181] The partition assembly 3 is movably installed inside the cargo body 1 to physically divide the interior space of the cargo body 1 into at least two independent temperature-controlled zones (e.g., a front freezer zone and a rear refrigerated zone).

[0182] To achieve stepless adjustment of the partitions, two high-strength guide rails are installed parallel to each other along the length of the inner top of the cargo box body 1. The main structure of the partition assembly 3 is suspended on the guide rails.

[0183] In a preferred embodiment, the partition assembly 3 adopts a top roller shutter structure, mainly comprising: 1. Moving Roller Mechanism: This mechanism is installed horizontally between two guide rails. It integrates a dual-drive system: a first drive motor moves the entire roller mechanism back and forth along the guide rails to determine the separation position; a second drive motor drives the roller to rotate, enabling the raising and lowering of the curtain fabric.

[0184] 2. Flexible thermal insulation curtain: Rolled up on a roller. To reduce weight and improve thermal insulation, the curtain is made of composite materials, consisting of an antibacterial fabric layer, a nano-aerogel insulation layer, and an aluminum foil reflective layer from the inside out. The antibacterial layer prevents mold growth, the aerogel layer blocks heat conduction, and the aluminum foil layer reflects heat radiation.

[0185] 3. Inflatable Sealing Mechanism: This is crucial for achieving reliable partitioning. Hollow sealing strips are embedded around the edges of the flexible insulated curtain (or the edges of the movable frame). An air pump is installed in a concealed location within the cargo body 1 (such as next to the chassis or unit) and connected to the hollow sealing strips via a hose. When the partition is in place and deployed, the air pump inflates the hollow sealing strips, causing them to expand and press tightly against the inner wall of the cargo body 1, eliminating gaps. When relocation is required, the hollow sealing strips deflate and contract, separating from the inner wall.

[0186] In another alternative embodiment, the partition assembly 3 can also adopt a folding screen structure. It is composed of multiple rigid or semi-rigid insulation panels connected by hinges. When folded up, it folds against the front wall of the cargo compartment, and when unfolded, it slides along the top guide rail to form a rigid insulation wall. In this case, an inflatable sealing mechanism or magnetic sealing strip is also set at the edge of the panel. The sealing strip is pressed out by a built-in motor or airbag to achieve linkage sealing with the cargo compartment.

[0187] The air volume regulation component is responsible for distributing the cooling capacity generated by the refrigeration unit 6 to the various temperature control zones divided by the partition component 3 as needed.

[0188] A main air supply duct extending along the length direction is provided on the top of the cargo body 1, and this duct is directly connected to the air outlet of the refrigeration unit 6. An air supply outlet is provided on the main air supply duct for each potential partition location, and an electric air supply damper 41 is installed at each air supply outlet.

[0189] To eliminate dead airflow areas, the air outlet is designed in the shape of a Venturi tube (converging and expanding tube). Utilizing the negative pressure generated by the acceleration of airflow through the throat section, this structure can efficiently draw air from inside the temperature control zone and mix it with the cold air blown out from the main air duct, thereby improving temperature uniformity.

[0190] The electric air supply damper 41 adopts a louver structure driven by a stepper motor. The controller 2 can precisely control the opening and closing angle of the blades, thereby linearly adjusting the flow rate of cold air supplied into the temperature control zone.

[0191] An independent longitudinal return air duct is provided at the bottom (or under the floor) of the cargo compartment 1. Similarly, a return air vent is provided at the location corresponding to each zone, and an electrically operated return air damper 42 is installed at each return air vent. The electrically operated return air damper 42 and the electrically operated supply air damper 41 are linked through control logic; when a certain area requires cooling, both open simultaneously. When a certain area is vacant, both close completely simultaneously, physically isolating that area from the air circulation.

[0192] To obtain the most accurate feedback on cargo temperature, sensor assembly 5 includes several high-precision temperature sensors. These temperature sensors are not randomly placed, but are integrated and installed at the return air vent of each zone (i.e., the inlet side of the electric return air damper 42). This ensures that the sensors collect the temperature of the air that flows back after passing over the cargo surface, avoiding the collection of the temperature of stagnant air in the dead zone of the air supply, thus providing an accurate basis for the closed-loop adjustment of controller 2.

[0193] The controller 2 is also connected to a human-machine interface (such as a touch screen) located outside the cab or cargo compartment. This interface is used for users to input commands such as "volume and temperature of cargo A" and "volume and temperature of cargo B". The controller 2 integrates a processor and memory for executing the above control methods, and can automatically calculate the partition position, adjust the damper opening, and control the output power of the refrigeration unit 6 based on user input.

[0194] The computer program product provided in this application includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation details, please refer to the method embodiments, which will not be repeated here.

[0195] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0196] Furthermore, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0197] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0198] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0199] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A control method of a refrigerated cargo compartment, characterized by, The method comprises the following steps: acquiring target temperatures and volumes of goods to be transported; dividing the goods to be transported into different temperature control groups according to the target temperatures, and calculating total required volumes corresponding to each temperature control group; controlling a partition assembly arranged inside a refrigerated cargo compartment to move along a length direction of the refrigerated cargo compartment based on each total required volume, so as to form multiple temperature control areas in the refrigerated cargo compartment, which are matched with the total required volumes; acquiring real-time temperatures of each temperature control area, and calculating temperature difference values between each real-time temperature and a corresponding target temperature respectively; adjusting a wind volume adjusting assembly of a corresponding temperature control area based on the temperature difference value of the temperature control area, so as to maintain each temperature control area at the corresponding target temperature.

2. The control method of a refrigerated cargo compartment according to claim 1, characterized in that, The step of dividing the goods to be transported into different temperature control groups according to the target temperatures, and calculating total required volumes corresponding to each temperature control group comprises the following steps: dividing the goods to be transported into the same temperature control group when the target temperatures are the same or the absolute value of the temperature difference between two target temperatures is within a preset range; collecting individual volumes of each item of the goods to be transported in each temperature control group, and accumulating the individual volumes to obtain an initial volume; correcting the initial volume based on a preset loading compression compensation coefficient, and calculating the total required volume corresponding to each temperature control group.

3. The control method of a refrigerated cargo compartment according to claim 1, characterized by, The partition assembly adopts a roller shutter structure or a folding screen structure. The step of controlling the partition assembly arranged inside the refrigerated cargo compartment to move along the length direction of the refrigerated cargo compartment based on each total required volume comprises the following steps: calculating target position coordinates of the partition assembly in the length direction of the refrigerated cargo compartment according to a cross-sectional area of the refrigerated cargo compartment and the total required volume; driving the partition assembly to move along a guide rail arranged on a top of the refrigerated cargo compartment, and monitoring a current position coordinate of the partition assembly in real time; stopping driving the partition assembly when the current position coordinate is consistent with the target position coordinate; controlling the roller shutter structure to perform a lowering operation, or controlling the folding screen structure to perform an unfolding operation, so that edges of the partition assembly form physical contact with inner walls of the refrigerated cargo compartment.

4. The control method of a refrigerated cargo compartment according to claim 3, characterized in that, Edges of the partition assembly are provided with an inflatable sealing mechanism. Before the step of driving the partition assembly to move along the guide rail arranged on the top of the refrigerated cargo compartment, the method further comprises the following steps: controlling the inflatable sealing mechanism to perform an exhaust action, and monitoring a gas pressure state of the inflatable sealing mechanism; driving the partition assembly when it is confirmed that the inflatable sealing mechanism is in a contracted state. After the step of controlling the roller shutter structure to perform a lowering operation, or controlling the folding screen structure to perform an unfolding operation, the method further comprises the following steps: controlling the inflatable sealing mechanism to perform an inflation action until the edges of the partition assembly are tightly attached to the inner walls of the refrigerated cargo compartment.

5. The control method of a refrigerated cargo compartment according to claim 1, characterized by, The wind volume adjusting assembly comprises a supply air damper and a return air damper arranged corresponding to each temperature control area. The step of adjusting the air volume adjustment assembly corresponding to each temperature control area based on the temperature difference of each temperature control area comprises: Obtaining a preset air supply and return air linkage control strategy; According to the temperature difference, the first target opening degree of the air supply damper and the second target opening degree of the return air damper are calculated respectively by using the linkage control strategy; The air supply damper and the return air damper corresponding to the temperature control area are controlled to move synchronously to reach the first target opening degree and the second target opening degree respectively.

6. The control method of a refrigerated cargo compartment according to claim 5, characterized in that, The step of adjusting the air volume adjustment assembly corresponding to each temperature control area comprises: Identify the refrigeration demand state of each temperature control area; When it is identified that the total demand volume of any one of the temperature control areas is zero, or the temperature control area is marked as a state without refrigeration, the air supply damper and the return air damper corresponding to the temperature control area are controlled to be completely closed.

7. The control method of a refrigerated cargo compartment according to claim 5, characterized by, The step of adjusting the air volume adjustment assembly corresponding to each temperature control area comprises: Real-time detection of the real-time temperature change rate of each temperature control area; When the change rate exceeds the preset safety rate threshold, and the real-time temperature has not reached the target temperature, a correction instruction is generated to reduce the opening degree of the air supply damper and the return air damper.

8. The control method of a refrigerated cargo compartment according to claim 1, characterized by, After the step of obtaining the real-time temperature of each temperature control area and calculating the temperature difference between each real-time temperature and the corresponding target temperature, the method further comprises: Obtaining the temperature difference of each temperature control area and calculating the current overall refrigeration demand; According to the overall refrigeration demand, the output power of the refrigeration unit is adjusted.

9. The control method of a refrigerated cargo compartment according to claim 1, characterized by, Each return air inlet corresponding to each temperature control area of the refrigerated cargo compartment is provided with a temperature sensor; the step of obtaining the real-time temperature of each temperature control area comprises: Through the temperature sensor, the temperature of the air flowing out of each temperature control area through the return air inlet is collected as the real-time temperature.

10. The control method of a refrigerated cargo compartment according to claim 1, characterized by, The step of obtaining the target temperature and the volume of the goods to be transported comprises: Receiving the goods type information and the corresponding volume of goods input by the user through the human-computer interaction interface; According to the goods type information, the best storage temperature in the preset goods attribute database is matched, and the best storage temperature is taken as the target temperature.

11. A refrigerated cargo compartment, characterized by The refrigerated cargo compartment comprises a compartment body, a controller, and a partition assembly, an air volume adjustment assembly, a sensor assembly and a refrigeration unit connected to the controller respectively; the controller is used to execute the control method of the refrigerated cargo compartment in any one of claims 1-10; The refrigeration unit is arranged in the compartment body; The partition assembly is movably installed in the compartment body and is used to divide the refrigerated cargo compartment into at least two temperature control areas; The air volume adjustment assembly comprises an air supply damper and a return air damper corresponding to each temperature control area.

12. The refrigerated cargo compartment of claim 11, wherein, The partition assembly comprises a guide rail installed on the top of the compartment body; the partition assembly adopts a roller shutter type structure or a folding screen type structure; An inflatable sealing mechanism is arranged on the edge of the partition assembly; The refrigerated cargo compartment also includes an air pump connected to the controller for inflating the inflatable seal mechanism.

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