Adaptive temperature zoning control system and method for flash freezing equipment

Abstract

The application discloses a self-adaptive temperature zoning control system and method for a flash freezing device, relates to the technical field of intelligent temperature control of the flash freezing device, and is used for solving the problems of uneven temperature control, abrupt adjustment of adjacent zones and insufficient adaptability in the freezing process. The freezing treatment area is divided into multiple temperature zones along the conveying direction of the object to be frozen. The air temperature, supply air temperature, return air temperature, surface temperature of the object to be frozen, conveying speed and zone coverage rate are collected. The temperature demand value, heat load characteristic value and temperature trend determination value are calculated. The target adjustment temperature and self-adaptive adjustment amount are generated. The adjacent zone boundary state is coordinately controlled. According to the adjustment result, the correlation coefficient is feedback corrected. The self-adaptive, continuous and refined control of the flash freezing process is realized.

Description

Technical Field

[0001] This invention relates to the field of intelligent temperature control technology for rapid freezing equipment, and more specifically, to an adaptive temperature zoning control system and method for rapid freezing equipment. Background Technology

[0002] Rapid freezing equipment is widely used for the rapid cooling of food, semi-finished products, and other items awaiting freezing. Its operational goal is to gradually bring materials to the target temperature according to a predetermined freezing stage within a limited conveying time, while ensuring freezing efficiency and temperature uniformity. Existing rapid freezing equipment typically employs overall setting or simple zone temperature control. While these methods can achieve basic cooling, in actual operation, the loading degree, conveying speed, surface temperature, and heat exchange state of materials at different locations continuously change, resulting in inconsistent heat loads in different zones. If operation continues with fixed setpoints or independent zone adjustments, problems such as insufficient local cooling, local overcooling, and abrupt changes in adjustment at the boundaries between adjacent zones can easily occur, thus affecting the continuous cooling state of materials during cross-zone transport and the overall freezing uniformity. Especially when there are significant differences in heat load between adjacent zones and opposite adjustment directions, existing control methods struggle to balance dynamic adaptability and boundary transition stability.

[0003] To address the above problems, this invention proposes a solution. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide an adaptive temperature zoning control system and method for rapid freezing equipment to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a preferred embodiment, it includes:

[0007] The freezing treatment area inside the rapid freezing equipment is continuously divided along the conveying direction of the object to be frozen, and multiple temperature zones are constructed in sequence, taking into account the range of cold energy, the location of changes in the freezing stage, and the range of heat exchange influence between adjacent areas.

[0008] Simultaneously characterize the freezing status of the objects to be frozen and the regional heat load for each temperature zone, and determine the temperature demand value, heat load characterization value and heat load level for each temperature zone.

[0009] Based on the freezing deviation, heat transfer status and temperature change trend of each temperature zone, the reference temperature of the corresponding freezing stage is corrected, and the target regulation temperature and effective regulation amount corresponding to each temperature zone are generated.

[0010] To address the imbalance and evolution of regulation between adjacent temperature zones, boundary coordination regulation is implemented. While maintaining the regulation direction, the boundary correction amount is reconstructed, and the boundary correction amount is released in stages through the boundary release coefficient to generate the final temperature zone regulation amount to be executed. After the regulation action is executed, the correction coefficient and regulation coefficient are corrected based on the remaining deviation after regulation, and the heat load level of each temperature zone is updated.

[0011] In a preferred embodiment, the freezing treatment area inside the rapid freezing equipment is continuously divided along the conveying direction of the object to be frozen. Based on the evaporator's cooling capacity coverage, the range of cold air action in the air supply channel, the location of the freezing stage changes, and the range of heat exchange influence of adjacent areas, multiple temperature zones are constructed in sequence, and each temperature zone is given a fixed number.

[0012] In a preferred embodiment, for each temperature zone, the air temperature, supply air temperature, return air temperature, surface temperature of the object to be frozen, conveying speed, and temperature zone coverage are collected. The status data are time-aligned, outlier removed, and smoothed to establish synchronous status data for each temperature zone at each processing moment. Based on the difference between the surface temperature of the object to be frozen and the reference temperature of the corresponding freezing stage, the temperature demand value of each temperature zone is calculated. The heat load characterization value of each temperature zone is calculated by combining the temperature zone coverage and the reciprocal of the conveying speed. Then, the heat load level of each temperature zone is determined according to the size of the heat load characterization value.

[0013] In a preferred embodiment, the air temperature of each temperature zone at the current processing time and the previous processing time is read, and the air temperature change value of each temperature zone is calculated. The heat exchange state value of each temperature zone is calculated by the difference between the return air temperature and the supply air temperature of the temperature zone. The temperature demand value is used as the freezing deviation value, and weighted together with the heat exchange state value and the air temperature change value of the temperature zone to generate the temperature trend judgment value of each temperature zone. Then, the reference temperature of each temperature zone corresponding to the freezing stage is read, and the reference temperature is corrected by combining the heat load characterization value and the temperature trend judgment value to generate the target adjustment temperature of each temperature zone. After limiting the target adjustment temperature to between the upper limit value and the lower limit value of the corresponding freezing stage temperature, the temperature adjustment deviation value of each temperature zone is calculated based on the difference between the actual air temperature of the temperature zone and the target adjustment temperature.

[0014] In a preferred embodiment, the temperature regulation deviation value, heat load characterization value, and temperature trend determination value are substituted into the adaptive regulation amount calculation formula to generate the adaptive regulation amount for each temperature zone. The regulation direction is determined according to the positive or negative value of the temperature regulation deviation value. After the adaptive regulation amount is limited, the effective regulation amount for each temperature zone is obtained. The target regulation temperature, effective regulation amount, and regulation direction are used as the corresponding inputs for determining the boundary state of adjacent temperature zones and reconstructing the boundary regulation amount.

[0015] In a preferred embodiment, the target adjustment temperature, air temperature of the temperature zone, surface temperature of the object to be frozen, conveying speed, temperature zone coverage, effective adjustment amount, and adjustment direction of the i-th temperature zone and the (i+1)-th temperature zone at the current processing time are extracted. The temperature zone air temperature difference between the i-th and (i+1)-th temperature zones is calculated as the boundary temperature gradient value, the surface temperature difference of the object to be frozen is calculated as the boundary material temperature difference value, the reciprocal difference of the conveying speed is calculated as the boundary residence difference, and the difference of the effective adjustment amount is calculated as the boundary adjustment difference. The boundary temperature gradient value is then used as the boundary temperature gradient value. The temperature gradient value, boundary material temperature difference value, boundary residence difference value, boundary adjustment difference value, and target adjustment temperature difference between the two temperature zones are all substituted into the boundary imbalance value calculation formula. After conversion according to the boundary conversion coefficients corresponding to each boundary state quantity, the boundary imbalance value between the i-th temperature zone and the (i+1)-th temperature zone is generated. Based on whether the adjustment directions of the i-th temperature zone and the (i+1)-th temperature zone are opposite, a boundary reverse adjustment mark is generated. The boundary evolution rate is generated by the difference between the boundary imbalance value at the current processing time and the boundary imbalance value at the previous processing time.

[0016] In a preferred embodiment, the following conditions are used as joint criteria for determining whether the i-th and i+1-th temperature zones enter the boundary coordinated adjustment state: the boundary reverse adjustment flag is in a reverse state, the boundary imbalance value is greater than a preset boundary imbalance threshold, and the boundary evolution rate is greater than a preset evolution threshold. After determining whether the boundary coordinated adjustment state has been entered, the target adjustment temperature, heat load characterization value, and temperature zone coverage rate of the i-th and i+1-th temperature zones are substituted into the boundary transition target temperature determination process. Temperature zones with larger heat load characterization values ​​and higher temperature zone coverage rates have a larger influence ratio, while temperature zones with smaller heat load characterization values ​​and lower temperature zone coverage rates have a smaller influence ratio. The boundary transition target temperature shared by two adjacent temperature zones is generated using a proportional method. Then, based on the boundary imbalance value and boundary evolution rate, the amplitude of the original effective regulation amount of the two adjacent temperature zones is redistributed while maintaining the direction. Specifically, for the temperature zone with a higher heat load level, the main regulation part is extracted from the original effective regulation amount, and the remaining part is converted into the transition regulation part corresponding to the boundary transition target temperature. For the temperature zone with a lower heat load level, the aggressive regulation part is reduced from the original effective regulation amount, and the reduced part is converted into the moderate regulation part corresponding to the boundary transition target temperature, so as to generate the boundary correction amount corresponding to the i-th temperature zone and the (i+1)-th temperature zone, respectively.

[0017] In a preferred embodiment, a boundary release coefficient is dynamically generated based on the boundary imbalance value, boundary evolution rate, and the continuity of the boundary reverse adjustment flag over multiple consecutive processing moments. The boundary release coefficient is increased when the boundary imbalance value continuously decreases and the boundary evolution rate turns negative, and decreased when the boundary imbalance value continuously increases and the boundary evolution rate remains positive. The boundary release coefficient is maintained within a preset locking range when the boundary reverse adjustment flag repeatedly switches over multiple consecutive processing moments. The boundary correction amount is then released in stages according to the boundary release coefficient. The staged boundary correction amount is combined with the original effective adjustment amount to generate the final temperature zone adjustment amount to be executed at the current processing moment. This temperature zone adjustment amount replaces the original effective adjustment amount to perform air supply intensity adjustment, air supply temperature adjustment, or delivery speed adjustment. After the adjustment action is executed, the effective adjustment amount, adjustment direction, adjustment action type, and the temperature zone air supply temperature, temperature zone return air temperature, and temperature zone air temperature after the adjustment action are recorded for each temperature zone.

[0018] In a preferred embodiment, after the adjustment action is performed in each temperature zone, the adjusted air temperature of the temperature zone and the surface temperature of the object to be frozen are collected. The adjusted air temperature of the temperature zone is compared with the target adjustment temperature, and the remaining temperature adjustment deviation value after the adjustment action is performed in each temperature zone is calculated. When the remaining temperature adjustment deviation value does not fall within the preset deviation judgment range, the correction coefficient used to correct the reference temperature of the freezing stage and the adjustment coefficient used to generate the adaptive adjustment amount are corrected. Specifically, the adjustment coefficient correction amount is calculated based on the ratio between the remaining temperature adjustment deviation value after the adjustment action and the temperature adjustment deviation value before the adjustment action, combined with the preset correction ratio coefficient, and the adjustment coefficient is adjusted by increment or decrement accordingly. At the same time, the air temperature of the temperature zone, the surface temperature of the object to be frozen, the conveying speed, and the temperature zone coverage are reread at the latest processing time of each temperature zone, the temperature demand value and the heat load characterization value are recalculated, and the heat load level of each temperature zone is updated.

[0019] In a preferred embodiment, it includes: a temperature partitioning construction module, a freezing state characterization module, a temperature regulation generation module, a boundary coordination correction module, and signal connections between the modules;

[0020] The temperature zoning construction module is used to continuously divide the freezing treatment area inside the rapid freezing equipment along the conveying direction of the object to be frozen, and to construct multiple sequentially arranged temperature zones by combining the range of cold energy, the location of changes in the freezing stage, and the range of heat exchange influence between adjacent areas.

[0021] The freezing state characterization module is used to synchronously characterize the freezing state of the object to be frozen and the regional heat load around each temperature zone, and determine the temperature demand value, heat load characterization value and heat load level corresponding to each temperature zone.

[0022] The temperature regulation generation module is used to correct the reference temperature of the corresponding freezing stage based on the freezing deviation, heat exchange status and temperature change trend of each temperature zone, and generate the target regulation temperature and effective regulation amount for each temperature zone.

[0023] The boundary coordination correction module is used to perform boundary coordination adjustment for the adjustment imbalance and evolution state between adjacent temperature zones. While maintaining the adjustment direction, it reconstructs the boundary correction amount and releases the boundary correction amount in stages through the boundary release coefficient to generate the final temperature zone adjustment amount to be executed. After the adjustment action is executed, the correction coefficient and adjustment coefficient are corrected by feedback based on the remaining deviation after adjustment, and the heat load level of each temperature zone is updated.

[0024] The technical effects and advantages of the adaptive temperature zoning control system and method for rapid freezing equipment of the present invention are as follows:

[0025] This invention, by continuously partitioning the internal area of ​​a rapid freezing device into temperature zones and integrating multi-dimensional status information such as zone air temperature, supply and return air temperature, material surface temperature, conveying speed, and coverage, can more accurately characterize the heat load and temperature change trends of each zone, thereby generating a target adjustment temperature and adaptive adjustment amount that match the actual freezing state. Simultaneously, this invention further introduces a boundary coordination mechanism between adjacent zones to dynamically correct reverse adjustments and boundary imbalances, avoiding abrupt temperature changes and discontinuous material cooling at the boundaries. Furthermore, by combining adjustment effect feedback with updates to the correction and adjustment coefficients, temperature control convergence, operational stability, and freezing uniformity can be improved, making it more conducive to achieving continuous, precise, and intelligent control of the rapid freezing process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the temperature zoning and measuring point arrangement of a rapid freezing equipment, which is an adaptive temperature zoning control system and method for rapid freezing equipment according to the present invention.

[0027] Figure 2 This is a schematic diagram illustrating the coordinated adjustment of adjacent temperature zone boundaries in the adaptive temperature zone control system and method for rapid freezing equipment according to the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In this embodiment, the present invention discloses an adaptive temperature zoning control method for rapid freezing equipment, comprising:

[0030] In step one, the internal freezing zone of the rapid freezing equipment is continuously divided along the conveying direction of the object to be frozen within the equipment, forming multiple sequentially arranged temperature zones. The division of temperature zones is based on the evaporator's corresponding cooling capacity coverage, the air supply duct's corresponding cold air effect range, the freezing stage changes of the object during conveying, and the heat exchange influence range between adjacent areas, ensuring that each temperature zone corresponds to a relatively concentrated freezing area. After the division is completed, each temperature zone is assigned a fixed number, while maintaining the spatial extent of each temperature zone, such as... Figure 1 As shown.

[0031] After temperature zoning is completed, the following data are collected for each temperature zone: zone air temperature, zone supply air temperature, zone return air temperature, surface temperature of the object to be frozen, conveying speed, and zone coverage. Zone air temperature is collected by temperature sensors positioned within the corresponding temperature zone, between the main cold air operating area and the area through which the object to be frozen passes. The collected zone air temperature characterizes the current ambient temperature within that temperature zone. Zone supply air temperature is collected by temperature sensors located at the air supply inlet of that temperature zone. The collected zone supply air temperature characterizes the temperature of the cold air entering that temperature zone. Zone return air temperature is collected by temperature sensors located in the return air channel of that temperature zone. The collected zone return air temperature characterizes the temperature of the air after heat exchange within that temperature zone. The surface temperature of the object to be frozen is collected by an infrared thermometer located at the equipment observation position, or by a contact thermometer attached to the surface of the object. The collected surface temperature characterizes the actual cooling state of the object within the current temperature zone. The conveying speed is obtained by detecting the rotational speed of the conveying mechanism's drive shaft and calculating it in conjunction with the transmission relationship, or by detecting the conveying displacement per unit time using a position encoder and then calculating it. The conveying speed characterizes the movement speed of the object to be frozen through each temperature zone. Zone coverage is obtained by acquiring regional images of the corresponding temperature zone and performing image recognition. Specifically, the current image of the temperature zone is first acquired using an image acquisition device, then the area of ​​the object to be frozen is identified from the image, and then the ratio of the area of ​​the area of ​​the object to be frozen to the total area of ​​the corresponding image of the temperature zone is calculated. The resulting ratio is used as the zone coverage of the temperature zone at the current moment. The zone coverage characterizes the loading degree of the object to be frozen within the temperature zone.

[0032] After collecting the status data for each temperature zone, time alignment is performed on the status data according to a preset sampling period. During time alignment, the zone air temperature, zone supply air temperature, zone return air temperature, surface temperature of the object to be frozen, conveying speed, and zone coverage rate falling within the same sampling period are uniformly grouped into the same processing time. When a certain status data has multiple sampling values ​​within the same sampling period, the average of the sampling values ​​within that sampling period is taken as the valid value of that status data at the current processing time. When a certain status data has not been updated within the same sampling period, the valid value corresponding to the previous processing time is taken as the status data for that item at the current processing time. After time alignment, each temperature zone corresponds to a set of synchronized status data at each processing time.

[0033] After time alignment, the state data corresponding to each temperature zone at each processing time is preprocessed. Preprocessing includes outlier removal and smoothing filtering. During outlier removal, each state data point at the current processing time is compared to its allowable range. If a state data point exceeds its allowable range, it is considered an outlier. The allowable range is preset based on the measurement range of the corresponding sensor and the normal variation range of the state data during rapid freezing operation. For state data identified as outliers, the valid value from the previous processing time for the same temperature zone is used as a replacement, or the interpolation result of adjacent valid values ​​before and after the current processing time is used. After outlier removal, a moving average filter is applied to the valid data from multiple consecutive processing times to obtain the preprocessed state data.

[0034] After obtaining the preprocessed state data, the temperature requirement value for each temperature zone is first calculated. The temperature requirement value is obtained by the difference between the surface temperature of the object to be frozen and the reference temperature of the corresponding freezing stage in that temperature zone, and the calculation formula is:

[0035] ;

[0036] in, This represents the temperature requirement value for the i-th temperature zone. This represents the surface temperature of the object to be frozen within the i-th temperature zone. This represents the reference temperature for the freezing stage corresponding to the i-th temperature zone. The reference temperature for the freezing stage is determined according to the current position of the object to be frozen on the transport path; that is, it uses the reference temperature corresponding to the previous freezing stage when the object is in the preceding temperature zone, the reference temperature corresponding to the middle freezing stage when the object is in the middle temperature zone, and the reference temperature corresponding to the later freezing stage when the object is in the later temperature zone. By calculating the temperature requirement value, the deviation between the object to be frozen in the current temperature zone and the target temperature of that freezing stage is obtained.

[0037] After obtaining the temperature requirements for each temperature zone, the heat load characterization value for each temperature zone is calculated by combining the zone coverage and conveying speed. The heat load characterization value is calculated using the following formula:

[0038] ;

[0039] in, This represents the heat load characterization value of the i-th temperature zone. This represents the temperature requirement value for the i-th temperature zone. This represents the partition coverage of the i-th temperature partition. This represents the conveying speed corresponding to the i-th temperature zone at the current processing moment. Where, zone coverage... Characterizes the loading degree of the objects to be frozen within the i-th temperature zone; conveying speed The reciprocal of the value represents the relative residence degree of the object to be frozen within the i-th temperature zone. By multiplying the temperature requirement value, zone coverage, and the reciprocal of the conveying speed, the heat load characterization value of the i-th temperature zone at the current processing moment is obtained.

[0040] After calculating the heat load characterization value for each temperature zone, the heat load characterization values ​​for each temperature zone at the current processing time are compared, and the heat load level of each temperature zone is determined according to the comparison results. The larger the heat load characterization value, the higher the heat load level of the corresponding temperature zone; the smaller the heat load characterization value, the lower the heat load level of the corresponding temperature zone.

[0041] In step two, for each temperature zone obtained in step one, including zone air temperature, zone supply air temperature, zone return air temperature, surface temperature of the object to be frozen, conveying speed, zone coverage, temperature requirement, heat load characterization value, and heat load level, the temperature change trend of each temperature zone at the current processing time is calculated. The temperature change trend refers to the direction and magnitude of change of the zone air temperature between consecutive processing times, used to characterize whether the current temperature of that temperature zone is continuously decreasing, basically stable, or showing a rebound. When calculating the temperature change trend, the zone air temperature of the i-th temperature zone at the current processing time is first read. And the zone air temperature at the previous processing time. Then calculate the change in air temperature of the temperature zone at the current processing time. The calculation formula is:

[0042] ;

[0043] in, This represents the change in air temperature of the i-th temperature zone at the current processing time. This represents the air temperature of the i-th temperature zone at the current processing time. This represents the air temperature of the i-th temperature zone at the previous processing time. When When the value is less than zero, it indicates that the air temperature of the i-th temperature zone is decreasing; when... When the temperature is close to zero, it indicates that the air temperature of the i-th temperature zone is in a stable state; when... When the value is greater than zero, it indicates that the air temperature in the i-th temperature zone has rebounded.

[0044] After obtaining the temperature change values ​​of each zone, the heat transfer state value of the i-th temperature zone at the current processing moment is calculated by combining the zone's supply air temperature and return air temperature. The heat transfer state value characterizes the degree of heat exchange between the cold air entering the i-th temperature zone and the object to be frozen. The heat transfer state value is calculated based on the difference between the zone's return air temperature and supply air temperature, using the following formula:

[0045] ;

[0046] in, This represents the heat transfer state value of the i-th temperature zone at the current processing time. This represents the return air temperature of the i-th temperature zone at the current processing time. This represents the supply air temperature of the i-th temperature zone at the current processing moment. The larger the difference between the zone return air temperature and the zone supply air temperature, the more heat the cold air absorbs in the i-th temperature zone, and the more significant the heat exchange process currently undertaken by the i-th temperature zone; the smaller the difference between the zone return air temperature and the zone supply air temperature, the relatively low heat exchange intensity of the i-th temperature zone.

[0047] After obtaining the zone air temperature change and heat transfer status values, the freezing deviation value of the i-th temperature zone at the current processing moment is determined based on the surface temperature of the object to be frozen and the temperature requirement. The freezing deviation value refers to the degree of deviation between the actual cooling state of the object to be frozen in the i-th temperature zone and the required freezing stage for that temperature zone. The freezing deviation value uses the temperature requirement value. This indicates that the result obtained in step one is based on the difference between the surface temperature of the object to be frozen and the reference temperature of the freezing stage. The larger the freezing deviation value, the farther the object to be frozen is from the requirement of the freezing stage in the i-th temperature zone; the smaller the freezing deviation value, the closer the object to be frozen is to the requirement of the freezing stage in the i-th temperature zone.

[0048] After obtaining the zone air temperature change value, heat transfer state value, and freezing deviation value, the current temperature state of the i-th temperature zone is comprehensively calculated to generate the temperature trend determination value for the i-th temperature zone. The temperature trend determination value is calculated according to the following formula:

[0049] ;

[0050] in, This represents the temperature trend determination value of the i-th temperature partition at the current processing time. This represents the temperature requirement value for the i-th temperature zone. This represents the heat transfer state value of the i-th temperature zone at the current processing time. This represents the change in air temperature of the i-th temperature zone at the current processing time. , and These represent the calculation weights corresponding to the temperature demand value, heat exchange status value, and zone air temperature change value, respectively. The calculation weights are determined by tuning based on historical operating data from the rapid freezing equipment during trial operation. Specifically, several sets of operating data with known freezing effects are selected, different weight combinations are substituted into the calculation, and the degree of matching between the actual freezing result of the object to be frozen and the calculated result is used as the tuning basis to determine the currently applicable calculation weights. Using temperature trend judgment values, the temperature deviation of the object to be frozen in the i-th temperature zone, the current heat exchange status of that temperature zone, and the temperature change status of that temperature zone itself are merged into the same calculation process.

[0051] After obtaining the temperature trend judgment values ​​for each temperature zone, the target conditioning temperature for each temperature zone at the current processing time is determined based on the combination of the temperature trend judgment values ​​and the heat load characterization values. The target conditioning temperature refers to the air temperature control target that the i-th temperature zone should achieve at the current processing time. To determine the target conditioning temperature for the i-th temperature zone, the reference temperature of the corresponding freezing stage for that temperature zone is first read. Then, the reference temperature is corrected based on the heat load characterization value and temperature trend determination value of the temperature zone. The calculation formula is as follows:

[0052] ;

[0053] in, This represents the target set temperature for the i-th temperature zone at the current processing time. This represents the reference temperature for the freezing stage corresponding to the i-th temperature zone. This represents the heat load characterization value of the i-th temperature zone. This represents the temperature trend determination value of the i-th temperature partition at the current processing time. and These represent correction coefficients corresponding to the heat load characterization value and the temperature trend determination value, respectively. These correction coefficients are pre-set according to the freezing process requirements of the rapid freezing equipment for the object to be frozen, and are adjusted based on trial operation results. The larger the heat load characterization value of the i-th temperature zone, the greater the current cooling load on that temperature zone, and thus the greater the correction magnitude for the reference temperature during the freezing stage. Similarly, the larger the temperature trend determination value of the i-th temperature zone, the more its current temperature change deviates from the requirements of the freezing stage, and thus the greater the correction magnitude for the reference temperature during the freezing stage. Through the above calculations, the target adjustment temperature corresponding to the i-th temperature zone at the current processing time is obtained.

[0054] After calculating the target regulating temperature for each temperature zone, a constraint process is applied to the target regulating temperature of each temperature zone. This constraint process involves limiting the target regulating temperature of each temperature zone to within the allowable regulating temperature range of the corresponding freezing stage, preventing the target regulating temperature from deviating from the equipment's permissible operating range. During the constraint process, the upper and lower temperature limits corresponding to the current freezing stage of the object to be frozen are first read, and then the target regulating temperature of the i-th temperature zone is set accordingly. The target temperature is compared with the upper and lower temperature limits corresponding to the freezing stage. When the target temperature is higher than the upper temperature limit, the upper temperature limit is used as the target temperature for the i-th temperature zone. When the target temperature is lower than the lower temperature limit, the lower temperature limit is used as the target temperature for the i-th temperature zone. When the target temperature is between the upper and lower temperature limits, the calculated target temperature remains unchanged. The upper and lower temperature limits are set according to the freezing process requirements of the object to be frozen. For example, the upper and lower temperature limits can be set according to the pre-cooling stage, the enhanced freezing stage, and the low-temperature equalization stage, respectively. The specific values ​​are based on the process settings.

[0055] After constraining the target temperature, the temperature control deviation for each temperature zone is calculated based on the difference between the actual air temperature and the target temperature. The temperature control deviation is calculated using the following formula:

[0056] ;

[0057] in, This represents the temperature adjustment deviation value of the i-th temperature zone at the current processing time. This represents the actual air temperature of the i-th temperature zone at the current processing moment. This represents the target regulated temperature for the i-th temperature zone at the current processing moment. The temperature regulation deviation value is used to characterize the magnitude of the deviation between the actual zone air temperature of the i-th temperature zone and the target regulated temperature that should be achieved. When the temperature regulation deviation value is large, it indicates that the deviation between the current actual temperature and the target regulated temperature of the i-th temperature zone is significant. When the temperature regulation deviation value is small, it indicates that the current actual temperature of the i-th temperature zone is close to the target regulated temperature.

[0058] After calculating the temperature regulation deviation value for each temperature zone, the target regulation temperature and temperature regulation deviation value for each temperature zone are determined together.

[0059] In step three, for each temperature zone determined in step two, the adaptive adjustment amount for each temperature zone at the current processing time is calculated. The adaptive adjustment amount refers to the adjustment amount applied during the cooling capacity adjustment process of the corresponding temperature zone, used to change the actual cooling capacity received by that temperature zone, so that the zone's air temperature approaches the target adjustment temperature. When generating the adaptive adjustment amount for each temperature zone, a fixed adjustment amount is not directly used; instead, the temperature adjustment deviation value, heat load characterization value, and temperature trend judgment value are all included in the calculation, so that the adjustment intensity of the same temperature zone changes with the current state at different processing times.

[0060] When calculating the adaptive adjustment amount for the i-th temperature zone, first read the temperature adjustment deviation value, heat load characterization value, and temperature trend judgment value of the i-th temperature zone at the current processing time, and then calculate the adaptive adjustment amount for the i-th temperature zone according to the following formula:

[0061] ;

[0062] in, This represents the adaptive adjustment amount of the i-th temperature partition at the current processing moment. This represents the temperature adjustment deviation value of the i-th temperature zone at the current processing time. This represents the heat load characterization value of the i-th temperature zone at the current processing time. This represents the temperature trend determination value of the i-th temperature partition at the current processing time. , and These represent the adjustment coefficients corresponding to the temperature regulation deviation value, heat load characterization value, and temperature trend judgment value, respectively. These adjustment coefficients are obtained through trial operation tuning. During tuning, operating data of the rapid freezing equipment under different loading levels, different conveying speeds, and different freezing stages are selected. The values ​​of each adjustment coefficient are adjusted accordingly, with the convergence rate of the zoned air temperature towards the target regulation temperature and the stability of the surface temperature of the object to be frozen reaching the requirements of the corresponding freezing stage serving as the tuning basis for determining the values ​​of each adjustment coefficient.

[0063] After the adaptive adjustment amount for the i-th temperature zone is calculated, the adjustment direction of the i-th temperature zone is determined based on the sign of its corresponding temperature adjustment deviation value. When the temperature adjustment deviation value of the i-th temperature zone is greater than zero, it indicates that the current actual air temperature of the i-th temperature zone is higher than the target adjustment temperature, and the i-th temperature zone is determined as the direction of enhanced cooling. When the temperature adjustment deviation value of the i-th temperature zone is less than zero, it indicates that the current actual air temperature of the i-th temperature zone is lower than the target adjustment temperature, and the i-th temperature zone is determined as the direction of reduced cooling. When the temperature adjustment deviation value of the i-th temperature zone is equal to zero or within the preset deviation tolerance range, the cooling capacity adjustment state of the i-th temperature zone at the current processing moment remains unchanged. The preset deviation tolerance range refers to the temperature range within which the zone air temperature is allowed to fluctuate slightly around the target adjustment temperature. This temperature range is set based on the temperature sensor measurement resolution and the temperature fluctuation amplitude during normal operation of the rapid freezing equipment.

[0064] After determining the adjustment direction for each temperature zone, the adaptive adjustment amount for each temperature zone is limited. Limiting refers to restricting the adaptive adjustment amount for each temperature zone within the allowable range of change for the corresponding adjustment action. This prevents excessive adjustment from causing overshoot in the zone's air temperature, or insufficient adjustment from resulting in insignificant temperature changes. During limiting, the upper and lower adjustment limits for each temperature zone are first read. Then, the calculated adaptive adjustment amount is compared with these limits. When the adaptive adjustment amount is greater than the upper limit, the upper limit is used as the effective adjustment amount for that temperature zone at the current processing time. When the adaptive adjustment amount is less than the lower limit, the lower limit is used as the effective adjustment amount for that temperature zone at the current processing time. When the adaptive adjustment amount is between the upper and lower limits, the calculated adaptive adjustment amount remains unchanged. The upper and lower adjustment limits are set according to the allowable range of change for the corresponding temperature zone's executable adjustment action. This allowable range is determined based on the operating condition settings of the rapid refrigeration equipment.

[0065] After determining the effective adjustment amount for each temperature zone, temperature zone adjustments are executed sequentially according to the heat load level of each zone. When performing temperature zone adjustments, the zones with higher heat load levels are adjusted first, followed by those with lower heat load levels. Temperature zones with higher heat load levels are prioritized because they correspond to larger heat load values ​​at the current processing time. This means that at least one of the following factors—the temperature requirement of the object to be frozen, zone coverage, or relative dwell time—is larger, thus indicating a higher temperature adjustment requirement at the current processing time. Once the execution order is determined, adjustments are implemented for each temperature zone one by one according to the effective adjustment amount and direction corresponding to each temperature zone at the current processing time.

[0066] The adjustment actions include changing the air supply intensity of the corresponding temperature zone, changing the air supply temperature of the corresponding temperature zone, or changing the passage speed of the object to be frozen within the corresponding temperature zone. When changing the air supply intensity, the flow rate of cold air entering that temperature zone is changed by adjusting the operating intensity of the air supply mechanism for that temperature zone. When the i-th temperature zone is in a cooling-enhancing direction, the operating intensity of the air supply mechanism is increased according to the effective adjustment amount corresponding to the i-th temperature zone; when the i-th temperature zone is in a cooling-decelerating direction, the operating intensity of the air supply mechanism is decreased according to the effective adjustment amount corresponding to the i-th temperature zone. When changing the air supply temperature, the temperature of the cold air entering the corresponding temperature zone is decreased or increased by adjusting the cooling output state during the cooling process. When the i-th temperature zone is in a cooling-enhancing direction, the zone air supply temperature of that temperature zone is decreased according to the effective adjustment amount corresponding to the i-th temperature zone; when the i-th temperature zone is in a cooling-decelerating direction, the zone air supply temperature of that temperature zone is increased according to the effective adjustment amount corresponding to the i-th temperature zone. When changing the speed at which the object to be frozen passes through a corresponding temperature zone, the residence time of the object in that temperature zone is changed by adjusting the operating speed of the conveyor mechanism. When the i-th temperature zone is in the direction of enhanced cooling, the conveyor speed is reduced according to the effective adjustment amount corresponding to the i-th temperature zone, so that the object to be frozen stays in that temperature zone for a longer time. When the i-th temperature zone is in the direction of weakened cooling, the conveyor speed is increased according to the effective adjustment amount corresponding to the i-th temperature zone, so that the residence time of the object to be frozen in that temperature zone is shortened.

[0067] When three types of adjustment actions—changing air supply intensity, changing air supply temperature, and changing conveyor speed—need to be performed simultaneously at the same processing time, the adjustment action of changing air supply intensity is performed first, followed by the adjustment action of changing air supply temperature, and finally the adjustment action of changing conveyor speed. When executed in this order, the cold air flow rate in the corresponding temperature zone is changed first, then the cold air temperature in the corresponding temperature zone is changed, and finally the residence time of the object to be frozen in the corresponding temperature zone is changed. Using this execution order, the real-time change in zone air temperature is first generated by adjusting the cold air flow rate, then further corrected by adjusting the cold air temperature, and finally the duration of cooling of the object to be frozen in that temperature zone is changed by adjusting the conveyor speed. This ensures that the various adjustment actions are implemented sequentially from fast to slow within the same processing time.

[0068] It should be noted that after the rapid freezing equipment is divided into multiple temperature zones along the conveying direction, each temperature zone generates a heat load characterization value based on its own zone air temperature, zone supply air temperature, zone return air temperature, surface temperature of the object to be frozen, conveying speed, and zone coverage. Furthermore, each zone obtains its own target adjustment temperature, temperature adjustment deviation value, and adaptive adjustment amount. Because the loading degree, temperature requirement, and conveying speed of the objects to be frozen vary across temperature zones, two adjacent temperature zones may receive opposite adjustment results at the same processing time. That is, the preceding temperature zone may need to increase cooling based on the current temperature adjustment deviation value, while the following temperature zone may need to decrease cooling based on the same temperature adjustment deviation value; or the preceding temperature zone may need to reduce the conveying speed to extend the residence time, while the following temperature zone may need to increase the conveying speed to shorten the residence time.

[0069] At this point, if the adjustment action is still directly executed based solely on the adaptive adjustment values ​​calculated independently for each temperature zone, abrupt temperature adjustment boundaries will form between adjacent temperature zones within the spatially continuous freezing processing area. This will cause abrupt changes in local heat transfer when the same cold air stream passes through adjacent temperature zones, and will also cause the object to be frozen to experience discontinuous cooling at the boundary between adjacent temperature zones. For the object to be frozen that is continuously moving along the conveying direction, this reverse adjustment state between adjacent temperature zones is not caused by an abnormal state within a single temperature zone, but rather by a zone coupling phenomenon formed by the simultaneous superposition of differences in heat load, target adjustment temperature, and adaptive adjustment values ​​between adjacent temperature zones. Especially when the preceding temperature zone has a high zone coverage and a low conveying speed, while the following temperature zone has a low zone coverage and a high conveying speed, although the two temperature zones meet their respective independent calculation conditions, a discontinuous adjustment state will form at the boundary between adjacent areas during actual freezing processing, causing uneven local cooling of the object to be frozen during cross-zone operation.

[0070] Therefore, in this embodiment, when each temperature zone performs an adjustment action, the boundary transition state between adjacent temperature zones is first determined, and then the effective adjustment amount of adjacent temperature zones is dynamically reconstructed based on the boundary transition state. For example... Figure 2 As shown, the boundary transition state here refers to the continuous cooling state change at the boundary between two adjacent temperature zones at the same processing moment, due to differences in target regulation temperature, actual zone air temperature, surface temperature of the object to be frozen, conveying speed, zone coverage, and effective regulation amount. The reason for determining the boundary transition state first is that adjacent temperature zones are spatially continuous, the object to be frozen passes continuously along the conveying direction, and there is actual flow and heat exchange between adjacent temperature zones. Therefore, although adjacent temperature zones calculate their respective effective regulation amounts, they cannot be considered completely isolated independent areas during execution.

[0071] When determining the boundary transition state between the i-th temperature zone and the (i+1)-th temperature zone, the target adjustment temperature, zone air temperature, surface temperature of the object to be frozen, conveying speed, zone coverage, effective adjustment amount, and adjustment direction of the i-th temperature zone and the (i+1)-th temperature zone at the current processing time are extracted first. Then, the boundary temperature gradient value, boundary material temperature difference value, boundary residence difference value, and boundary adjustment difference between adjacent temperature zones are calculated. The boundary temperature gradient value refers to the difference between the zone air temperature of the i-th temperature zone and the zone air temperature of the (i+1)-th temperature zone, used to characterize the actual ambient temperature difference between adjacent temperature zones at the current processing time; the boundary material temperature difference value refers to the difference between the surface temperature of the object to be frozen in the i-th temperature zone and the surface temperature of the object to be frozen in the (i+1)-th temperature zone, used to characterize the actual cooling state change experienced by the object to be frozen when crossing adjacent temperature zones; the boundary residence difference value refers to the difference between the reciprocals of the corresponding conveying speeds of the i-th and (i+1)-th temperature zones, used to characterize the difference in the relative residence degree of the object to be frozen in adjacent temperature zones; the boundary adjustment difference value refers to the difference between the corresponding effective adjustment amounts of the i-th and (i+1)-th temperature zones, used to characterize the difference in the adjustment range between adjacent temperature zones at the current processing time.

[0072] After obtaining the above boundary state variables, the boundary imbalance value between the i-th temperature zone and the (i+1)-th temperature zone is further generated. The boundary imbalance value characterizes whether adjacent temperature zones have formed an abnormal boundary state affecting the continuous cooling process at the current processing time. The boundary imbalance value is calculated using the following formula:

[0073] ;

[0074] in, This represents the boundary imbalance value between the i-th temperature zone and the (i+1)-th temperature zone. This represents the zone air temperature of the i-th temperature zone. This represents the zone air temperature of the (i+1)th temperature zone. This represents the surface temperature of the object to be frozen within the i-th temperature zone. This represents the surface temperature of the object to be frozen within the (i+1)th temperature zone. This represents the conveying speed corresponding to the i-th temperature zone. This represents the conveying speed corresponding to the (i+1)th temperature zone. This represents the effective adjustment amount corresponding to the i-th temperature zone. This represents the effective adjustment amount corresponding to the (i+1)th temperature zone. This represents the target set temperature corresponding to the i-th temperature zone. This represents the target adjustment temperature corresponding to the (i+1)th temperature zone. to These represent the boundary conversion coefficients corresponding to each boundary state variable. These boundary conversion coefficients are set based on historical statistical data of the influence of each boundary state variable on the temperature abrupt change at the interface under continuous operation conditions of the rapid freezing equipment.

[0075] After calculating the boundary imbalance value, a boundary reversal adjustment flag is generated by combining the adjustment directions of the i-th temperature zone and the (i+1)-th temperature zone. This boundary reversal adjustment flag indicates whether adjacent temperature zones are in opposite adjustment states at the current processing moment. When the adjustment directions of the i-th and (i+1)-th temperature zones are opposite, the boundary reversal adjustment flag is set to the reverse state; when the adjustment directions of the i-th and (i+1)-th temperature zones are the same, the boundary reversal adjustment flag is set to the same direction. Since the boundary imbalance value only characterizes the magnitude of the state difference between adjacent temperature zones, while the adjustment direction reflects whether the next change trends of adjacent temperature zones are mutually offset, both the boundary imbalance value and the boundary reversal adjustment flag are used simultaneously when determining whether to change the original effective adjustment amount.

[0076] To avoid misinterpreting short-term disturbances as persistent imbalances based solely on the state at a single processing moment, the boundary imbalance values ​​of the i-th and (i+1)-th temperature zones are further extracted over multiple consecutive processing moments, generating a boundary evolution rate. The boundary evolution rate refers to the rate of change of the boundary imbalance values ​​of adjacent temperature zones between consecutive processing moments, characterizing whether the boundary anomaly is worsening, remaining constant, or weakening. The boundary evolution rate is obtained by the difference between the boundary imbalance value at the current processing moment and the boundary imbalance value at the previous processing moment. When the boundary evolution rate is greater than zero, it indicates that the state difference at the boundary of adjacent temperature zones is widening; when the boundary evolution rate is less than zero, it indicates that the state difference at the boundary of adjacent temperature zones is decreasing; when the boundary evolution rate is close to zero, it indicates that the state difference at the boundary of adjacent temperature zones is stable.

[0077] After obtaining the boundary imbalance value, the boundary reverse adjustment flag, and the boundary evolution rate, it is determined whether the i-th temperature zone and the (i+1)-th temperature zone have entered a boundary coordinated adjustment state. Here, the boundary coordinated adjustment state refers to a state where adjacent temperature zones are no longer allowed to continue performing adjustment actions entirely according to their independently obtained effective adjustment amounts; instead, the effective adjustment amounts of adjacent temperature zones are coupled and corrected. During the determination, when the boundary reverse adjustment flag is in the reverse state, and the boundary imbalance value is greater than a preset boundary imbalance threshold, and the boundary evolution rate is greater than a preset evolution threshold, the i-th temperature zone and the (i+1)-th temperature zone are determined to have entered a boundary coordinated adjustment state. When the boundary imbalance value does not reach the preset boundary imbalance threshold, or the boundary evolution rate does not reach the preset evolution threshold, the original effective adjustment amount remains unchanged. The preset boundary imbalance threshold is set according to the maximum allowable state difference at the boundary between adjacent temperature zones, and the preset evolution threshold is set according to the allowable expansion rate of the abnormal boundary state.

[0078] When the i-th and (i+1)-th temperature zones enter the boundary coordination and regulation state, instead of simply reducing the effective regulation amount of the temperature zone with the lower heat load level, a shared boundary transition target temperature is first generated between adjacent temperature zones. This boundary transition target temperature refers to the transition temperature benchmark used to mitigate abrupt changes in regulation at the boundary between adjacent temperature zones. The boundary transition target temperature is determined jointly based on the target regulation temperature, heat load characterization value, and zone coverage rate of the i-th and (i+1)-th temperature zones. This ensures that the temperature zone with a larger heat load characterization value and higher zone coverage rate has a greater influence on the boundary transition target temperature, while the temperature zone with a smaller heat load characterization value and lower zone coverage rate has a smaller influence. Through this process, adjacent temperature zones no longer independently advance towards their significantly different target regulation temperatures at the boundary; instead, they first form a transition regulation trend around the same boundary transition target temperature.

[0079] In one specific implementation, the boundary transition target temperature is calculated using the following formula:

[0080] Tb=(W1×T1+W2×T2) / (W1+W2);

[0081] Where Tb represents the boundary transition target temperature shared by the i-th temperature zone and the (i+1)-th temperature zone, T1 represents the target adjustment temperature corresponding to the i-th temperature zone, T2 represents the target adjustment temperature corresponding to the (i+1)-th temperature zone, W1 represents the boundary influence weight corresponding to the i-th temperature zone, and W2 represents the boundary influence weight corresponding to the (i+1)-th temperature zone; the boundary influence weights are calculated according to the following formulas:

[0082] W1 = L1 × C1;

[0083] W2 = L2 × C2;

[0084] Where L1 represents the heat load characterization value corresponding to the i-th temperature zone, L2 represents the heat load characterization value corresponding to the (i+1)-th temperature zone, C1 represents the temperature zone coverage rate corresponding to the i-th temperature zone, and C2 represents the temperature zone coverage rate corresponding to the (i+1)-th temperature zone. By multiplying the heat load characterization value and the temperature zone coverage rate to form the boundary influence weight, temperature zones with larger heat load characterization values ​​and higher temperature zone coverage rates have a greater influence proportion in the boundary transition target temperature, while temperature zones with smaller heat load characterization values ​​and lower temperature zone coverage rates have a smaller influence proportion in the boundary transition target temperature.

[0085] After determining the boundary transition target temperature, boundary correction values ​​are generated for the i-th and (i+1)-th temperature zones respectively. These boundary correction values ​​are used to redistribute the amplitude of the original effective regulation while maintaining its direction. For temperature zones with higher heat load levels, the original effective regulation value is not directly kept unchanged. Instead, based on the boundary imbalance value and boundary evolution rate, the main regulation component of the original effective regulation value is extracted, and the remaining regulation component is transformed into a transitional regulation component. For temperature zones with lower heat load levels, the original effective regulation value is not directly weakened as a whole. Instead, based on the boundary imbalance value and boundary evolution rate, the aggressive regulation component of the original effective regulation value is reduced, and the reduced component is transformed into a moderate regulation component consistent with the boundary transition target temperature. After this processing, adjacent temperature zones still retain their respective regulation directions, but a continuous regulation state without abrupt changes in direction or amplitude is formed at the boundary.

[0086] In one specific implementation, to facilitate amplitude redistribution of the original effective regulation while maintaining its direction, boundary redistribution coefficients are first generated based on the boundary imbalance value and the boundary evolution rate. The boundary redistribution coefficients are calculated using the following formula:

[0087] R = b1 × B + b2 × V;

[0088] Where R represents the boundary redistribution coefficient between the i-th temperature zone and the (i+1)-th temperature zone, B represents the boundary imbalance value between the i-th temperature zone and the (i+1)-th temperature zone, V represents the boundary evolution rate between the i-th temperature zone and the (i+1)-th temperature zone, and b1 and b2 represent the redistribution coefficients corresponding to the boundary imbalance value and the boundary evolution rate, respectively. To avoid the boundary redistribution coefficient being too large, after calculating the boundary redistribution coefficient, the boundary redistribution coefficient is limited to a preset redistribution range.

[0089] For temperature zones with high heat load levels, the main regulation portion and the transition regulation portion of the original effective regulation are determined by the following formula:

[0090] U(main) = U1 × (1 - R);

[0091] U(pass) = U1 - U(main);

[0092] Wherein, U(main) represents the main control part corresponding to the i-th temperature zone, U(trans) represents the transition control part corresponding to the i-th temperature zone, and U1 represents the original effective control amount corresponding to the i-th temperature zone.

[0093] For temperature zones with lower heat load levels, the aggressive and moderate adjustment portions of the original effective adjustment are determined by the following formula:

[0094] U(excited)=U2×R;

[0095] U (slow)=U2-U (excited);

[0096] Wherein, U(excitation) represents the aggressive adjustment portion corresponding to the (i+1)th temperature zone, U(gradient) represents the moderate adjustment portion corresponding to the (i+1)th temperature zone, and U2 represents the original effective adjustment amount corresponding to the (i+1)th temperature zone.

[0097] After obtaining the main control portion, transition control portion, aggressive control portion, and moderate control portion, boundary correction amounts corresponding to the i-th temperature zone and the (i+1)-th temperature zone are generated respectively. The boundary correction amount for the i-th temperature zone is formed jointly by the main control portion and the transition control portion, while the boundary correction amount for the (i+1)-th temperature zone is formed jointly by the aggressive control portion and the moderate control portion. Through this process, temperature zones with higher heat load levels retain a larger main control portion, while the remaining portion is converted into a transition control portion corresponding to the boundary transition target temperature; temperature zones with lower heat load levels have their aggressive control portion reduced, and the reduced portion is converted into a moderate control portion corresponding to the boundary transition target temperature.

[0098] To ensure that the boundary correction amount changes in real time with the boundary state, a boundary release coefficient is generated. The boundary release coefficient refers to the degree to which the original effective regulation amount is allowed to recover to the independent regulation state under the boundary coordinated regulation state. The boundary release coefficient dynamically changes based on the boundary imbalance value, the boundary evolution rate, and the persistence of the boundary reverse regulation marker over multiple consecutive processing times: when the boundary imbalance value continuously decreases and the boundary evolution rate turns negative, the boundary release coefficient is gradually increased, allowing adjacent temperature zones to gradually recover their original effective regulation amounts; when the boundary imbalance value continuously increases and the boundary evolution rate remains positive, the boundary release coefficient is decreased, allowing adjacent temperature zones to continue maintaining the regulation state after boundary correction; when the boundary reverse regulation marker repeatedly switches over multiple consecutive processing times, the boundary release coefficient is kept within a preset locking range, ensuring that adjacent temperature zones maintain a stable boundary coordinated regulation state over multiple consecutive processing times, thereby preventing the regulation action from flipping back and forth at the boundary between adjacent temperature zones.

[0099] After the boundary release coefficient is determined, the boundary correction amount of the i-th temperature zone and the (i+1)-th temperature zone is released in stages according to the boundary release coefficient, and the zone adjustment amount to be finally executed at the current processing moment is generated.

[0100] In one specific implementation, the boundary release coefficient is generated recursively. Let the boundary release coefficient at the current processing time be G, and the boundary release coefficient at the previous processing time be G0. Then, the boundary release coefficient is updated as follows:

[0101] When the boundary imbalance value at the current processing time is less than the boundary imbalance value at the previous processing time, and the boundary evolution rate is less than zero,

[0102] G = G0 + p1;

[0103] When the boundary imbalance value at the current processing time is greater than the boundary imbalance value at the previous processing time, and the boundary evolution rate is greater than zero,

[0104] G = G0 - p2;

[0105] When the boundary reverse adjustment flag switches repeatedly over multiple consecutive processing times...

[0106] G = G (lock);

[0107] Where p1 represents the step size for increasing the boundary release coefficient, p2 represents the step size for decreasing the boundary release coefficient, and G (lock) represents the boundary release coefficient within the preset locking range. To ensure that the boundary release coefficient is always within the allowed range, G is restricted to the preset release range after each update.

[0108] After obtaining the boundary release coefficient, the final temperature zone adjustment amounts executed by the i-th temperature zone and the (i+1)-th temperature zone at the current processing time are calculated using the following formulas:

[0109] Uf1 = G × U1 + (1 - G) × Ub1;

[0110] Uf2 = G × U2 + (1 - G) × Ub2;

[0111] Wherein, Uf1 represents the final temperature partition adjustment amount executed by the i-th temperature partition at the current processing time, Uf2 represents the final temperature partition adjustment amount executed by the (i+1)-th temperature partition at the current processing time, U1 represents the original effective adjustment amount corresponding to the i-th temperature partition at the current processing time, U2 represents the original effective adjustment amount corresponding to the (i+1)-th temperature partition at the current processing time, Ub1 represents the boundary correction amount corresponding to the i-th temperature partition at the current processing time, and Ub2 represents the boundary correction amount corresponding to the (i+1)-th temperature partition at the current processing time. Through this method, when the boundary release coefficient is small, adjacent temperature partitions maintain the adjusted state after boundary correction for a greater extent; when the boundary release coefficient is large, adjacent temperature partitions gradually restore their original effective adjustment amounts.

[0112] The phased release refers to not applying the entire boundary correction amount to the original effective regulation amount all at once in a single processing moment, but rather gradually changing the final zone regulation amount over multiple consecutive processing moments based on the boundary release coefficient. In this process, the changes in zone air temperature, the surface temperature of the object to be frozen, and the transport status at the boundary between the i-th and i+1-th temperature zones maintain a continuous transition, thus preventing the object to be frozen from experiencing abrupt cooling when crossing adjacent temperature zones.

[0113] After generating the final zone adjustment amount to be executed at the current processing moment, this zone adjustment amount replaces the original effective adjustment amount, and adjustments such as changing the air supply intensity, changing the air supply temperature, or changing the conveying speed are executed accordingly. After execution, the zone air temperature, surface temperature of the object to be frozen, conveying speed, and zone coverage of adjacent temperature zones are read, and the boundary imbalance value, boundary evolution rate, and boundary release coefficient for the next processing moment are recalculated to update the boundary coordination adjustment state of adjacent temperature zones.

[0114] After completing the temperature zone adjustment for each temperature zone, record the effective adjustment amount, adjustment direction, adjustment action type, and the zone supply air temperature, zone return air temperature, and zone air temperature corresponding to each temperature zone at the current processing time.

[0115] In step four, after the temperature zone adjustment actions are completed in step three, the zone's air temperature, supply air temperature, return air temperature, and the surface temperature of the object to be frozen are collected after the adjustment actions are performed. The status data after the adjustment actions are performed are compared with the status data at the corresponding processing time before the adjustment actions are performed to determine the actual temperature change results of each temperature zone under the action of this adjustment. The actual temperature change results here refer to the adjustment result characterized by the changes in the zone's air temperature and the surface temperature of the object to be frozen after the adjustment action is performed. This reflects whether the adjustment action of this temperature zone has brought it closer to the required freezing stage.

[0116] When calculating the actual temperature change result for the i-th temperature zone, first read the zone air temperature after the adjustment action is performed at the current processing time, and the zone air temperature at the processing time before the adjustment action was performed. Then calculate the zone air temperature response value corresponding to the current adjustment action of the i-th temperature zone. The zone air temperature response value represents the actual change range of the zone air temperature after the adjustment action is performed in the i-th temperature zone.

[0117] After calculating the zoned air temperature response value, the surface temperature of the object to be frozen in the i-th temperature zone before and after the adjustment action is executed is read, and the surface temperature change value of the object to be frozen in the i-th temperature zone is calculated. The surface temperature change value of the object to be frozen refers to the change in the surface temperature of the object to be frozen in the i-th temperature zone relative to the previous processing time under the action of this adjustment. The surface temperature change value of the object to be frozen is obtained by subtracting the surface temperature of the object to be frozen before the action from the surface temperature of the object to be frozen after the action. By using the surface temperature change value of the object to be frozen, it can be determined whether this adjustment action not only changed the ambient temperature of the i-th temperature zone, but also whether it further changed the actual cooling state of the object to be frozen in that temperature zone.

[0118] After obtaining the zone air temperature response value and the surface temperature change value of the object to be frozen, the actual temperature change result of the i-th temperature zone is compared with the target adjustment temperature determined in step two to generate the adjustment effect value of the i-th temperature zone. The adjustment effect value here refers to the degree to which the actual zone air temperature of the i-th temperature zone approaches the target adjustment temperature after the current adjustment action is performed. To calculate the adjustment effect value of the i-th temperature zone, the zone air temperature after the adjustment action and the target adjustment temperature of the zone are first read, and then the difference between the two is calculated to obtain the remaining temperature adjustment deviation value of the i-th temperature zone after the adjustment action. The smaller the remaining temperature adjustment deviation value, the more significant the adjustment effect of the current adjustment action of the i-th temperature zone; the larger the remaining temperature adjustment deviation value, the weaker the adjustment effect of the current adjustment action of the i-th temperature zone.

[0119] After generating the adjustment effect values ​​for each temperature zone, it is determined whether the adjustment action for each temperature zone has achieved the expected adjustment level. During this determination, the remaining temperature adjustment deviation value of the i-th temperature zone is compared with a preset deviation judgment range. The preset deviation judgment range refers to the allowable temperature deviation range after the i-th temperature zone performs one adjustment action under normal operating conditions of the rapid freezing equipment. This preset deviation judgment range is set based on the measurement resolution of the temperature sensor, the normal fluctuation range of the zone's air temperature, and the temperature control accuracy requirements of the corresponding freezing stage. When the remaining temperature adjustment deviation value of the i-th temperature zone falls within the preset deviation judgment range, the adjustment action for the i-th temperature zone is determined to be effective adjustment; when the remaining temperature adjustment deviation value of the i-th temperature zone does not fall within the preset deviation judgment range, the adjustment action for the i-th temperature zone is determined to be deviation adjustment. Effective adjustment indicates that the adjustment action has brought the zone air temperature of the i-th temperature zone to the allowable control range; deviation adjustment indicates that after the adjustment action, the zone air temperature of the i-th temperature zone still has not met the current processing requirements.

[0120] When the current adjustment action of the i-th temperature zone is determined to be a deviation adjustment, the correction coefficient and adjustment coefficient used in steps two and three for the i-th temperature zone are corrected. The correction coefficient refers to the correction coefficient used in step two to correct the reference temperature during the freezing stage based on the heat load characterization value and the temperature trend determination value; the adjustment coefficient refers to the adjustment coefficient used in step three to generate the adaptive adjustment amount based on the temperature adjustment deviation value, the heat load characterization value, and the temperature trend determination value. When correcting the correction coefficient and adjustment coefficient of the i-th temperature zone, it is first determined whether the remaining temperature adjustment deviation value after the current adjustment action of that temperature zone is continuously large or continuously small. A continuously large value means that the remaining temperature adjustment deviation value of the i-th temperature zone is large for multiple consecutive processing times, and the zone's air temperature does not approach the target adjustment temperature sufficiently; a continuously small value means that the adjustment action of the i-th temperature zone for multiple consecutive processing times causes the zone's air temperature to exceed the allowable fluctuation range corresponding to the target adjustment temperature, resulting in over-adjustment. If the temperature is consistently too high, increase the correction or adjustment coefficient corresponding to the i-th temperature zone so that the temperature zone will have a larger temperature correction range or a larger adaptive adjustment amount in the next processing time. If the temperature is consistently too low, decrease the correction or adjustment coefficient corresponding to the i-th temperature zone so that the temperature zone will have a smaller temperature correction range or a smaller adaptive adjustment amount in the next processing time.

[0121] To ensure that the correction and adjustment coefficients have a clear basis for adjustment, when correcting the adjustment coefficient of the i-th temperature zone, the adjustment coefficient correction amount is generated according to the ratio between the remaining temperature adjustment deviation value at the current processing time of that temperature zone and the temperature adjustment deviation value before the adjustment action. The adjustment coefficient correction amount is calculated using the following formula:

[0122] ;

[0123] in, This represents the adjustment coefficient correction amount corresponding to the i-th temperature zone at the k-th processing time. This indicates the correction ratio. This represents the remaining temperature regulation deviation value of the i-th temperature zone after the regulation action is performed at the k-th processing time. This represents the temperature regulation deviation value of the i-th temperature zone before the adjustment action is performed at the k-th processing time. The correction ratio coefficient is set according to the temperature convergence speed requirements of the rapid freezing equipment under trial operation conditions. When the remaining temperature regulation deviation value is a large proportion of the temperature regulation deviation value before the adjustment action, it indicates that the effect of this adjustment action in reducing the temperature regulation deviation value is weak, and a larger adjustment coefficient correction amount is generated; when the remaining temperature regulation deviation value is a small proportion of the temperature regulation deviation value before the adjustment action, it indicates that the effect of this adjustment action in reducing the temperature regulation deviation value is significant, and a smaller adjustment coefficient correction amount is generated. After generating the adjustment coefficient correction amount, the adjustment coefficient corresponding to the i-th temperature zone is then incrementally or subtractively corrected according to this adjustment coefficient correction amount.

[0124] After correcting the adjustment coefficient, the same proportional correction method is used for the correction coefficient used to correct the reference temperature during the freezing stage. Let the correction amount for the current processing time be X, then the correction amount is calculated using the following formula:

[0125] X = q × E (remainder) / E (original);

[0126] Where X represents the correction coefficient of the i-th temperature zone at the current processing time, q represents the correction ratio coefficient, E(remainder) represents the remaining temperature adjustment deviation value of the i-th temperature zone after the adjustment action is performed at the current processing time, and E(original) represents the temperature adjustment deviation value of the i-th temperature zone before the adjustment action is performed at the current processing time.

[0127] When the remaining temperature adjustment deviation value after the adjustment action of the i-th temperature zone continues to be large, the correction coefficient corresponding to the i-th temperature zone is increased accordingly; when the remaining temperature adjustment deviation value after the adjustment action of the i-th temperature zone continues to be small, the correction coefficient corresponding to the i-th temperature zone is decreased accordingly. During correction, if the correction coefficients used for the i-th temperature zone in step two are λ1 and λ2 respectively, the corrected correction coefficients are updated according to the following formulas:

[0128] λ(1,new)=λ(1,old)+X;

[0129] λ(2,new)=λ(2,old)+X;

[0130] Where λ(1,new) and λ(2,new) represent the corrected coefficients, and λ(1,old) and λ(2,old) represent the original corrected coefficients. To avoid excessive changes in the corrected coefficients over multiple consecutive processing times, the corrected coefficients are limited to a preset correction range after each correction.

[0131] After correcting the adjustment and adjustment coefficients, the heat load level of each temperature zone is updated. When updating the heat load level of each temperature zone, the zone air temperature, the surface temperature of the object to be frozen, the conveying speed, and the zone coverage are reread for the latest processing time. The temperature demand value and heat load characterization value of each temperature zone are recalculated, and then compared with the recalculated heat load characterization values ​​to obtain the updated heat load level. After this update, the heat load level of each temperature zone at the next processing time will be consistent with the latest operating status.

[0132] After updating the heat load levels, the reference temperatures for the freezing stages of each temperature zone are checked. During the check, the surface temperature of the object to be frozen at the latest processing time for each temperature zone is read, and compared with the reference temperature range of the current freezing stage for that temperature zone. When the surface temperature of the object to be frozen has entered the completion range of the current freezing stage, the freezing stage corresponding to that temperature zone is adjusted to the next freezing stage, and the reference temperature for the next freezing stage is read. When the surface temperature of the object to be frozen has not entered the completion range of the current freezing stage, the current freezing stage of that temperature zone remains unchanged. The completion range of the freezing stage here refers to the range of surface temperatures that the object to be frozen is allowed to reach at the end of the corresponding freezing stage; this range is set according to the freezing process requirements of the object to be frozen. By checking the freezing stages, each temperature zone can be re-aligned to the corresponding freezing stage according to the current actual freezing progress when the freezing process of the object to be frozen changes.

[0133] After completing the correction coefficient correction, adjustment coefficient correction, heat load level update, and freezing stage verification for each temperature zone, save the zone air temperature, zone supply air temperature, zone return air temperature, surface temperature of the object to be frozen, conveying speed, zone coverage, heat load characterization value, heat load level, target adjustment temperature, temperature adjustment deviation value, correction coefficient, and adjustment coefficient for each temperature zone at the current processing time. The saved data will be used as the current status data to be called when adjusting the temperature zone in the next processing time.

[0134] This invention also proposes an adaptive temperature zoning control system for rapid freezing equipment, comprising: a temperature zoning construction module, a freezing state characterization module, a temperature regulation generation module, a boundary coordination correction module, and signal connections between the modules;

[0135] The temperature zoning construction module is used to continuously divide the freezing treatment area inside the rapid freezing equipment along the conveying direction of the object to be frozen, and to construct multiple sequentially arranged temperature zones by combining the range of cold energy, the location of changes in the freezing stage, and the range of heat exchange influence between adjacent areas.

[0136] The freezing state characterization module is used to synchronously characterize the freezing state of the object to be frozen and the regional heat load around each temperature zone, and determine the temperature demand value, heat load characterization value and heat load level corresponding to each temperature zone.

[0137] The temperature regulation generation module is used to correct the reference temperature of the corresponding freezing stage based on the freezing deviation, heat exchange status and temperature change trend of each temperature zone, and generate the target regulation temperature and effective regulation amount for each temperature zone.

[0138] The boundary coordination correction module is used to perform boundary coordination adjustment for the adjustment imbalance and evolution state between adjacent temperature zones. While maintaining the adjustment direction, it reconstructs the boundary correction amount and releases the boundary correction amount in stages through the boundary release coefficient to generate the final temperature zone adjustment amount to be executed. After the adjustment action is executed, the correction coefficient and adjustment coefficient are corrected by feedback based on the remaining deviation after adjustment, and the heat load level of each temperature zone is updated.

[0139] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0140] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product.

[0141] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and inventive constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0142] In addition, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0143] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0144] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adaptive temperature zoning control method for rapid refrigeration equipment, characterized in that, include: The freezing treatment area inside the rapid freezing equipment is continuously divided along the conveying direction of the object to be frozen, and multiple temperature zones are constructed in sequence, taking into account the range of cold energy, the location of changes in the freezing stage, and the range of heat exchange influence between adjacent areas. Simultaneously characterize the freezing status of the objects to be frozen and the regional heat load for each temperature zone, and determine the temperature demand value, heat load characterization value and heat load level for each temperature zone. Based on the freezing deviation, heat transfer status and temperature change trend of each temperature zone, the reference temperature of the corresponding freezing stage is corrected, and the target regulation temperature and effective regulation amount corresponding to each temperature zone are generated. To address the imbalance and evolution of regulation between adjacent temperature zones, boundary coordination regulation is performed. While maintaining the regulation direction, the boundary correction amount is reconstructed, and the boundary correction amount is released in stages through the boundary release coefficient to generate the final temperature zone regulation amount to be executed. After the adjustment action is executed, the correction coefficient and adjustment coefficient are corrected based on the remaining deviation after adjustment, and the heat load level of each temperature zone is updated.

2. The adaptive temperature zoning control method for rapid freezing equipment according to claim 1, characterized in that: The internal freezing treatment area of ​​the rapid freezing equipment is continuously divided along the conveying direction of the object to be frozen. Based on the evaporator's cooling capacity coverage, the range of cold air action in the air supply channel, the location of the freezing stage changes, and the range of heat exchange influence of adjacent areas, multiple temperature zones are constructed in sequence, and each temperature zone is given a fixed number.

3. The adaptive temperature zoning control method for rapid freezing equipment according to claim 2, characterized in that: Around each temperature zone, the air temperature, supply air temperature, return air temperature, surface temperature of the object to be frozen, conveying speed, and temperature zone coverage are collected. Time alignment, outlier removal, and smoothing filtering are performed on each status data to establish synchronous status data for each temperature zone at each processing moment. Based on the difference between the surface temperature of the object to be frozen and the reference temperature of the corresponding freezing stage, the temperature demand value of each temperature zone is calculated. The heat load characterization value of each temperature zone is calculated by combining the temperature zone coverage and the reciprocal of the conveying speed. Finally, the heat load level of each temperature zone is determined according to the magnitude of the heat load characterization value.

4. The adaptive temperature zoning control method for rapid freezing equipment according to claim 3, characterized in that; Read the air temperature of each temperature zone at the current processing time and the previous processing time, and calculate the air temperature change value of each temperature zone; calculate the heat exchange state value of each temperature zone by the difference between the return air temperature and the supply air temperature of each temperature zone; use the temperature demand value as the freezing deviation value, and calculate it together with the heat exchange state value and the air temperature change value of each temperature zone to generate the temperature trend judgment value of each temperature zone; then read the reference temperature of each temperature zone corresponding to the freezing stage, and correct the reference temperature by combining the heat load characterization value and the temperature trend judgment value to generate the target adjustment temperature of each temperature zone; after limiting the target adjustment temperature between the upper limit value and the lower limit value of the corresponding freezing stage temperature, calculate the temperature adjustment deviation value of each temperature zone based on the difference between the actual air temperature of the temperature zone and the target adjustment temperature.

5. The adaptive temperature zoning control method for rapid freezing equipment according to claim 4, characterized in that: The temperature regulation deviation value, heat load characterization value, and temperature trend judgment value are substituted into the adaptive regulation amount calculation formula to generate the adaptive regulation amount for each temperature zone. The regulation direction is determined according to the positive or negative value of the temperature regulation deviation value. After the adaptive regulation amount is limited, the effective regulation amount for each temperature zone is obtained. The target regulation temperature, effective regulation amount, and regulation direction are used as the corresponding inputs for the boundary state judgment and boundary regulation amount reconstruction of adjacent temperature zones.

6. The adaptive temperature zoning control method for rapid freezing equipment according to claim 5, characterized in that: Extract the target adjustment temperature, air temperature of the temperature zone, surface temperature of the object to be frozen, conveying speed, temperature zone coverage, effective adjustment amount, and adjustment direction of the i-th temperature zone and the (i+1)-th temperature zone at the current processing time. Calculate the temperature zone air temperature difference between the i-th and (i+1)-th temperature zones as the boundary temperature gradient value, the surface temperature difference of the object to be frozen as the boundary material temperature difference value, the reciprocal difference of the conveying speed as the boundary dwell time difference value, and the effective adjustment amount difference as the boundary adjustment difference value. Substitute the boundary temperature gradient value, boundary material temperature difference value, boundary dwell time difference, boundary adjustment difference value, and the target adjustment temperature difference between the two temperature zones into the boundary imbalance value calculation formula. After conversion according to the boundary conversion coefficients corresponding to each boundary state quantity, the boundary imbalance value between the i-th and (i+1)-th temperature zones is generated. Based on whether the adjustment directions of the i-th temperature zone and the (i+1)-th temperature zone are opposite, a boundary reverse adjustment flag is generated, and the boundary evolution rate is generated by the difference between the boundary imbalance value at the current processing time and the boundary imbalance value at the previous processing time.

7. The adaptive temperature zoning control method for rapid freezing equipment according to claim 6, characterized in that: The boundary reverse adjustment flag being in the reverse state, the boundary imbalance value being greater than the preset boundary imbalance threshold, and the boundary evolution rate being greater than the preset evolution threshold are used as the joint judgment conditions for the i-th temperature zone and the (i+1)-th temperature zone to enter the boundary coordinated adjustment state. After determining that the boundary coordination adjustment state has been entered, the target adjustment temperature, heat load characterization value, and temperature zone coverage of the i-th and i+1-th temperature zones are substituted into the boundary transition target temperature determination process. The boundary transition target temperature shared by the two adjacent temperature zones is generated in such a way that the temperature zone with a larger heat load characterization value and a higher temperature zone coverage has a larger influence proportion, and the temperature zone with a smaller heat load characterization value and a lower temperature zone coverage has a smaller influence proportion. Then, based on the boundary imbalance value and the boundary evolution rate, the amplitude of the original effective adjustment amount of the two adjacent temperature zones is redistributed while maintaining the direction. Specifically, for the temperature zone with a higher heat load level, the main adjustment part is extracted from the original effective adjustment amount, and the remaining part is converted into the transition adjustment part corresponding to the boundary transition target temperature. For the temperature zone with a lower heat load level, the aggressive adjustment part is reduced from the original effective adjustment amount, and the reduced part is converted into the moderate adjustment part corresponding to the boundary transition target temperature, so as to generate the boundary correction amount corresponding to the i-th and i+1-th temperature zones, respectively.

8. The adaptive temperature zoning control method for rapid freezing equipment according to claim 7, characterized in that; Based on the boundary imbalance value, boundary evolution rate, and the continuity of the boundary reverse adjustment flag over multiple consecutive processing moments, a boundary release coefficient is dynamically generated. The boundary release coefficient is increased when the boundary imbalance value continuously decreases and the boundary evolution rate turns negative, and decreased when the boundary imbalance value continuously increases and the boundary evolution rate remains positive. When the boundary reverse adjustment flag repeatedly switches over multiple consecutive processing moments, the boundary release coefficient is kept within a preset locking range. The boundary correction amount is then released in stages according to the boundary release coefficient. The staged boundary correction amount is combined with the original effective adjustment amount to generate the final temperature zone adjustment amount to be executed at the current processing moment. This temperature zone adjustment amount replaces the original effective adjustment amount to perform supply air intensity adjustment, supply air temperature adjustment, or delivery speed adjustment. After the adjustment action is executed, the effective adjustment amount, adjustment direction, adjustment action type, and the supply air temperature, return air temperature, and air temperature of each temperature zone after the adjustment action are recorded.

9. The adaptive temperature zoning control method for rapid refrigeration equipment according to claim 8, characterized in that: After the adjustment action is performed in each temperature zone, the air temperature of the adjusted temperature zone and the surface temperature of the object to be frozen are collected. The air temperature of the adjusted temperature zone is compared with the target adjustment temperature, and the remaining temperature adjustment deviation value after the adjustment action is performed in each temperature zone is calculated. When the remaining temperature adjustment deviation value does not fall within the preset deviation judgment range, the correction coefficient used to correct the reference temperature of the freezing stage and the adjustment coefficient used to generate the adaptive adjustment amount are corrected. Specifically, based on the ratio between the remaining temperature adjustment deviation value after the adjustment action and the temperature adjustment deviation value before the adjustment action, combined with the preset correction ratio coefficient, the adjustment coefficient correction amount is calculated, and the adjustment coefficient is adjusted by increment or decrement accordingly. At the same time, the air temperature of each temperature zone, the surface temperature of the object to be frozen, the conveying speed, and the temperature zone coverage are reread at the latest processing time of each temperature zone. The temperature demand value and heat load characterization value are recalculated, and the heat load level of each temperature zone is updated.

10. An adaptive temperature zoning control system for rapid freezing equipment, used to implement the adaptive temperature zoning control method for rapid freezing equipment as described in any one of claims 1-9, characterized in that, include: Temperature zoning construction module, frozen state characterization module, temperature regulation generation module, boundary coordination correction module, and signal connections between modules; The temperature zoning construction module is used to continuously divide the freezing treatment area inside the rapid freezing equipment along the conveying direction of the object to be frozen, and to construct multiple sequentially arranged temperature zones by combining the range of cold energy, the location of changes in the freezing stage, and the range of heat exchange influence between adjacent areas. The freezing state characterization module is used to synchronously characterize the freezing state of the object to be frozen and the regional heat load around each temperature zone, and determine the temperature demand value, heat load characterization value and heat load level corresponding to each temperature zone. The temperature regulation generation module is used to correct the reference temperature of the corresponding freezing stage based on the freezing deviation, heat exchange status and temperature change trend of each temperature zone, and generate the target regulation temperature and effective regulation amount for each temperature zone. The boundary coordination correction module is used to perform boundary coordination adjustment for the adjustment imbalance and evolution state between adjacent temperature zones. While maintaining the adjustment direction, it reconstructs the boundary correction amount and releases the boundary correction amount in stages through the boundary release coefficient to generate the final temperature zone adjustment amount to be executed. After the adjustment action is executed, the correction coefficient and adjustment coefficient are corrected based on the remaining deviation after adjustment, and the heat load level of each temperature zone is updated.

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