Refrigeration control method for double-system refrigerator under high ambient temperature and double-system refrigerator

Abstract

This invention discloses a refrigeration control method for a dual-system refrigerator under high ambient temperature and a dual-system refrigerator. The method collects temperature fluctuation sequences of the dual-path walls on the condenser and evaporator sides, constructing heat release characteristic surfaces on the dual condenser sides and heat absorption characteristic surfaces on the dual evaporator sides, respectively. These two characteristic surfaces are input into a refrigeration cycle coupling misalignment assessment model to obtain dual-system coupling misalignment indication information characterizing the attenuation level of refrigeration load transfer capacity of the refrigeration and freezing branches under high ambient temperature. This dual-system coupling misalignment indication information is input into a dual-system mode migration path planning strategy to generate mode migration path description information containing the target operating load direction indication of both branches. Based on the mode migration path description information, the refrigerant flow cross-section adjustment step direction of the two branches is synchronously adjusted to generate refrigerant delivery and distribution execution commands, realizing coupled sensing and adaptive adjustment of the refrigeration load distribution of the dual-system refrigerator under high ambient temperature.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology, specifically to a dual-system refrigerator refrigeration control method and a dual-system refrigerator under high ambient temperature conditions. Background Technology

[0002] Dual-system refrigerators typically feature independent refrigeration circuits for the refrigerator and freezer compartments. These two circuits share a single compressor, and the refrigerant flow is switched via an electric switching valve or electronic expansion valve to achieve independent temperature control for the refrigerator and freezer compartments. Under high ambient temperatures, both the refrigerator and freezer compartments face high heat loads, intensifying competition for the compressor's cooling capacity between the two circuits and potentially disrupting the overall thermodynamic balance of the refrigeration system. If either circuit continuously occupies cooling resources due to a sudden increase in heat load, it can cause abnormal increases in the evaporation temperature or abnormal fluctuations in the condensation temperature of the other circuit, leading to a misalignment of the dual-system refrigeration cycles and weakening the system's load transfer capability.

[0003] Existing control strategies typically determine the cooling demand of each branch independently based on the deviation between the compartment temperature and the set value. They lack a global monitoring method for the coupling relationship between the heat release state on the condensing side and the heat absorption state on the evaporating side. This makes it difficult to accurately assess the real-time coupling coordination of the two systems under high ambient temperature conditions, resulting in the refrigerant flow path switching and distribution decisions not matching the current actual coupling state of the system. Summary of the Invention

[0004] This invention provides a method for controlling the refrigeration of a dual-system refrigerator under high ambient temperature conditions, and a dual-system refrigerator.

[0005] This invention provides a method for controlling the refrigeration of a dual-system refrigerator under high ambient temperature conditions, comprising: In response to the high ambient temperature trigger command, the temperature fluctuation sequence of the refrigeration condenser pipe wall and the freezing condenser pipe wall of the dual-system refrigerator are collected, and the temperature fluctuation sequence of the refrigeration evaporator pipe wall and the freezing evaporator pipe wall are collected simultaneously. A dual condensation-side heat release characteristic surface is created based on the temperature fluctuation sequence of the refrigeration condensation pipe wall and the temperature fluctuation sequence of the freezing condensation pipe wall; a dual evaporation-side heat absorption characteristic surface is created based on the temperature fluctuation sequence of the refrigeration evaporation pipe wall and the temperature fluctuation sequence of the freezing evaporation pipe wall. The heat release characteristic surface of the dual condensing side and the heat absorption characteristic surface of the dual evaporating side are input into the refrigeration cycle coupling mismatch assessment model to perform refrigeration cycle coupling mismatch assessment processing, and obtain dual system coupling mismatch degree indication information. The dual system coupling mismatch degree indication information is used to characterize the attenuation level of refrigeration load transfer capacity of the refrigeration branch and the freezing branch under high ambient temperature. The dual-system coupling mismatch degree indication information is input into the dual-system mode migration path planning strategy to plan the dual-system mode migration path and generate mode migration path description information including the target operating load direction indication of the refrigeration branch and the target operating load direction indication of the freezing branch. Based on the mode migration path description information, the refrigerant flow section adjustment step direction of the refrigeration branch and the refrigerant flow section adjustment step direction of the freezing branch are synchronously adjusted to generate a refrigerant delivery and distribution execution command.

[0006] This invention also provides a dual-system refrigerator, comprising: processor; Storage device, on which computer programs are stored, When the computer program is executed by the processor, the processor implements any of the above-described dual-system refrigerator cooling control methods under high ambient temperature.

[0007] This invention also provides a readable storage medium storing a program or instructions, which, when executed by a processor, implement the steps of the dual-system refrigerator refrigeration control method under high ambient temperature.

[0008] Therefore, the embodiments of the present invention have the following beneficial effects: By simultaneously collecting the dual-path wall temperature fluctuation sequences of the condensing and evaporating sides and constructing dual-condensing-side heat release characteristic surfaces and dual-evaporating-side heat absorption characteristic surfaces respectively, the condensing-side heat release process and the evaporating-side heat absorption process are incorporated into a unified coupling analysis framework. Using a refrigeration cycle coupling mismatch assessment model, the degree of coupling mismatch of the dual system under high ambient temperature is comprehensively evaluated from four dimensions: condensing-side trend shift, morphological differences, evaporating-side intensity matching, and alternation rhythm. This allows the determination of the attenuation level of refrigeration load transfer capacity to be based on the correlation analysis of the global thermodynamic state of the condensing and evaporating sides. Furthermore, through a dual-system mode migration path planning strategy, the coupling mismatch degree indication information is transformed into mode migration path description information containing the direction indication of the target operating load of both branches. Based on this, the refrigerant flow cross-section adjustment step direction of the refrigeration branch and the freezing branch is adjusted synchronously, realizing closed-loop control from quantitative assessment of coupling mismatch to generation of refrigerant allocation execution commands. This effectively improves the adaptability and control accuracy of the dual-system refrigerator refrigeration load allocation under high ambient temperature. Attached Figure Description

[0009] Figure 1 This is a flowchart of a dual-system refrigerator refrigeration control method under high ambient temperature provided in an embodiment of the present invention.

[0010] Figure 2 This is a mobile app interface diagram for refrigeration control of a dual-system refrigerator under high ambient temperature, provided in an embodiment of the present invention.

[0011] Figure 3 This is a schematic diagram illustrating the interaction between a dual-system refrigerator and a mobile app, provided as an embodiment of the present invention. Detailed Implementation

[0012] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] See Figure 1 As shown, this figure is a flowchart of a dual-system refrigerator refrigeration control method under high ambient temperature conditions provided by an embodiment of the present invention. This method is executed by a dual-system refrigerator. Figure 1 As shown, the method includes steps 110-150.

[0014] Step 110: In response to the high ambient temperature trigger command, collect the temperature fluctuation sequence of the refrigeration condenser pipe wall and the freezing condenser pipe wall of the dual-system refrigerator, and simultaneously collect the temperature fluctuation sequence of the refrigeration evaporator pipe wall and the freezing evaporator pipe wall.

[0015] In this embodiment, the high ambient temperature trigger command is generated by the refrigerator's main control system based on the real-time ambient temperature value collected by the ambient temperature sensor. When the ambient temperature detected by the ambient temperature sensor exceeds the preset high ambient temperature threshold, the main control system generates the high ambient temperature trigger command. Upon triggering this command, the refrigerator's data acquisition module begins to collect four channels of temperature fluctuation sequence data in parallel at a fixed sampling period.

[0016] Specifically, the first sequence is the temperature fluctuation sequence of the refrigeration condenser pipe wall. This sequence is formed by a first temperature sensor attached to the outer wall of the refrigeration compartment condenser pipe, recording the wall temperature values ​​at each sampling time according to the sampling period, and arranging them in chronological order. The second sequence is the temperature fluctuation sequence of the freezer condenser pipe wall, recorded synchronously by a second temperature sensor attached to the outer wall of the freezer compartment condenser pipe at the same sampling period. The third sequence is the temperature fluctuation sequence of the refrigeration evaporator pipe wall, synchronously collected by a third temperature sensor attached to the outer wall of the refrigeration compartment evaporator pipe. The fourth sequence is the temperature fluctuation sequence of the freezer evaporator pipe wall, synchronously collected by a fourth temperature sensor attached to the outer wall of the freezer compartment evaporator pipe. The sampling times of these four temperature fluctuation sequences correspond one-to-one, meaning that four temperature values ​​are recorded simultaneously at each sampling time. This provides a temporal synchronization basis for subsequent cross-sequence correlation analysis and feature face alignment. Each temperature value in the four-channel sequence is measured in degrees Celsius, and the time interval between adjacent sampling times is a pre-set fixed duration. For example, the consistency of the sampling interval can be ensured by the timer interrupt service program of the refrigerator's main control system.

[0017] Step 120: Create a dual condensation-side heat release characteristic surface based on the temperature fluctuation sequence of the refrigeration condensation pipe wall and the freezing condensation pipe wall; create a dual evaporation-side heat absorption characteristic surface based on the temperature fluctuation sequence of the refrigeration evaporation pipe wall and the freezing evaporation pipe wall.

[0018] This step involves pairwise processing of the four temperature fluctuation sequences acquired in step 110 on both the condensing and evaporating sides to construct feature surfaces reflecting the heat exchange states of the dual system on both sides. The dual condensing-side heat release feature surface is a two-dimensional or high-dimensional structured data representation formed by jointly analyzing the wall temperature fluctuations of the refrigerated and frozen condensing pipes. It includes the comparative relationship and morphological differences in temperature change trends during the heat release process of the two condensing branches. The dual evaporating-side heat absorption feature surface is a structured data representation formed by jointly analyzing the wall temperature fluctuations of the refrigerated and frozen evaporating pipes. It includes the comparative relationship and alternation rhythm information of heat transfer intensity changes during the heat absorption process of the two evaporating branches. This feature surface construction method provides a structured input data format for subsequent coupling misalignment assessment.

[0019] Step 120 is further implemented through the following steps 121 to 126: Step 121: Extract the temperature change vector direction between adjacent temperature sampling times in the temperature fluctuation sequence of the refrigeration condenser pipe wall to generate a refrigeration condenser temperature change vector direction sequence.

[0020] For each sampling point in the temperature fluctuation sequence of the refrigerated condenser pipe wall, except for the last sampling point, the difference between the temperature value of that sampling point and the temperature value of its next adjacent sampling point is calculated. The direction of the temperature change vector from the current sampling time to the next sampling time is determined according to the sign of the difference. If the difference is positive, the direction of the temperature change vector is marked as the heating direction; if the difference is negative, it is marked as the cooling direction; if the difference is zero, it is marked as the neutral direction. Arranging the temperature change vector directions corresponding to each sampling point in chronological order forms the refrigerated condenser temperature change vector direction sequence. The length of this sequence is 1 less than the length of the original temperature fluctuation sequence, and each element in the sequence is a discrete direction label.

[0021] Step 122: Identify the reversal point of the refrigeration condensation temperature fluctuation based on the vector direction sequence of the refrigeration condensation temperature change, and determine the temperature sampling segment between adjacent reversal points of the refrigeration condensation temperature fluctuation as the refrigeration condensation temperature fluctuation segment unit.

[0022] The sequence of refrigerated condensing temperature change vector directions is traversed and scanned to detect locations where the direction labels change. Specifically, when the direction label at any position in the sequence differs from the direction label at the previous position, and neither direction is parallel, the sampling point corresponding to that position is marked as a reversal point of the refrigerated condensing temperature fluctuation. If any direction label changes from heating to cooling or from cooling to heating, the sampling point corresponding to the boundary where this change occurs is the reversal point. After marking all reversal points, the segment from the first sampling point to the first reversal point in the original refrigerated condensing pipe wall temperature fluctuation sequence is taken as a refrigerated condensing temperature fluctuation segment unit. The segment from the next sampling point after the first reversal point to the second reversal point is taken as the next refrigerated condensing temperature fluctuation segment unit, and so on, until the end of the sequence is reached. Thus, the entire temperature fluctuation sequence is divided into multiple continuous segment units, with the direction label within each segment unit remaining consistent, indicating that the internal temperature exhibits a monotonic change trend in a single direction.

[0023] Step 123: Assign a refrigeration condensing temperature fluctuation segment direction label to each refrigeration condensing temperature fluctuation segment unit. The refrigeration condensing temperature fluctuation segment direction label is used to distinguish between temperature rise fluctuation segments and temperature fall fluctuation segments.

[0024] For each refrigeration condensation temperature fluctuation segment unit obtained in step 122, a segment direction label is assigned based on the direction of temperature change within that segment unit. If the temperature within the segment unit shows an upward trend, it is labeled as a temperature rise fluctuation segment; if the temperature within the segment unit shows a downward trend, it is labeled as a temperature fall fluctuation segment. Since the temperature change vector direction label is consistent within each segment unit, the segment direction label can directly inherit the direction label corresponding to any sampling point within that segment unit.

[0025] Step 124: Merge adjacent refrigeration condensing temperature fluctuation segment units with the same refrigeration condensing temperature fluctuation segment direction label to generate a refrigeration condensing temperature fluctuation in the same direction merged segment.

[0026] After assigning direction labels to all paragraph units in step 123, the direction labels of adjacent paragraph units are compared. If two adjacent paragraph units have the same direction label, i.e., both are heating fluctuation paragraphs or both are cooling fluctuation paragraphs, then these two adjacent paragraph units are merged into a larger paragraph unit. This merging process is repeated until the direction labels of any two adjacent paragraph units are no longer the same. The paragraph units generated after the merging process are called refrigerated condensation temperature fluctuation unidirectional merged paragraphs. The temperature change direction within each unidirectional merged paragraph is consistent, and the temperature change direction between adjacent unidirectional merged paragraphs is opposite, thus forming a complete alternating sequence of heating and cooling phases in the temperature fluctuation sequence.

[0027] Step 125: Extract the paragraph time span level and paragraph temperature change amplitude level of the paragraphs that merge in the same direction of refrigeration condensation temperature fluctuation, and generate a descriptor for the trend of refrigeration condensation heat release change.

[0028] For each refrigerated condensing temperature fluctuation segment merged in the same direction after step 124, the segment's time span level and temperature change amplitude level are calculated. The time span level is calculated by counting the number of sampling points within the segment and comparing this number with a preset time span classification threshold range to determine the segment's time span level category, such as short-term, medium-term, and long-term. The temperature change amplitude level is calculated by calculating the absolute difference between the temperature value at the beginning and end of the segment's sampling point and comparing this difference with a preset temperature change amplitude classification threshold range to determine the segment's temperature change amplitude level category, such as small-amplitude, medium-amplitude, and large-amplitude. The paragraph time span level and paragraph temperature change amplitude level of each parallel-direction merged paragraph are combined into a binary tuple. All binary tuples of parallel-direction merged paragraphs are arranged in the paragraph time order to form a descriptor of the change trend of refrigeration condensation heat release. This descriptor records the duration and amplitude characteristics of each heating and cooling stage in the refrigeration condensation pipeline during the heat release process in a serialized form.

[0029] Step 126: Based on the descriptor of the change trend of refrigeration condensation heat release, process the temperature fluctuation sequence of the refrigeration condensation pipe wall and create a dual condensation side heat release feature surface.

[0030] Using the same method as steps 121 to 125, the temperature fluctuation sequence of the refrigeration and condensation pipeline wall is processed to obtain a descriptor for the trend of refrigeration and condensation heat release. Specifically, the temperature change vector direction between adjacent sampling points in the refrigeration and condensation pipeline wall temperature fluctuation sequence is extracted to generate a sequence of refrigeration and condensation temperature change vector directions; the reversal point of the refrigeration and condensation temperature fluctuation is identified based on this direction sequence, and the refrigeration and condensation temperature fluctuation segment units are segmented; a refrigeration and condensation fluctuation segment direction label is assigned to each segment unit; adjacent segments in the same direction are merged to obtain refrigeration and condensation temperature fluctuation segments in the same direction; the segment time span level and segment temperature change amplitude level of each merged segment are extracted and combined to form a descriptor for the trend of refrigeration and condensation heat release.

[0031] After obtaining the descriptors for the heat release trends of refrigeration and freezing condensation respectively, they are aligned on the time axis and stacked in the spatial dimension. Since the temperature sampling times of the refrigeration and freezing condensation pipelines are completely synchronized, the segment units in the two descriptors are naturally aligned on the time axis. With the time axis as the horizontal axis, the segment time span level sequence, segment temperature change amplitude level sequence, and corresponding segment direction label sequence in the refrigeration condensation heat release trend descriptor are used as the first set of channel data, and the three sequences corresponding to freezing and condensation are used as the second set of channel data. These two sets of channel data are spliced ​​according to the channel dimension to form a multi-dimensional structured data tensor. This tensor is the dual-condensation side heat release feature surface. This feature surface retains the temporal evolution information of the condensation side heat release process in the time dimension, distinguishes the heat release behavior of the refrigeration branch and the freezing branch in the channel dimension, and includes two types of quantitative indicators in the feature dimension: time span and temperature amplitude.

[0032] Step 120 also includes the process of creating a dual-evaporation-side heat absorption characteristic surface based on the temperature fluctuation sequence of the refrigerated evaporation pipe wall and the temperature fluctuation sequence of the frozen evaporation pipe wall, specifically implemented through steps 127 to 1212: Step 127: Extract the temperature change amplitude values ​​between adjacent temperature sampling times in the temperature fluctuation sequence of the refrigerated evaporation pipeline wall to generate a refrigerated evaporation temperature change amplitude sequence.

[0033] For each sampling point in the temperature fluctuation sequence of the refrigerated evaporator pipe wall, except for the last sampling point, the absolute difference between the temperature value of that sampling point and the temperature value of its next adjacent sampling point is calculated. This absolute difference represents the temperature change amplitude from the current sampling time to the next sampling time. The temperature change amplitude values ​​corresponding to each sampling point are arranged in chronological order to form a refrigerated evaporator temperature change amplitude sequence. Each element in this sequence is a non-negative real number, and its magnitude reflects the severity of the temperature fluctuation of the refrigerated evaporator pipe wall within the corresponding time interval.

[0034] Step 128: Identify the drastic fluctuation range and the gradual fluctuation range of evaporation temperature in the refrigeration system based on the sequence of evaporation temperature variation. Use the drastic fluctuation range and the gradual fluctuation range of evaporation temperature as segmentation units of the evaporation heat absorption state in the refrigeration system.

[0035] A fluctuation amplitude judgment threshold is set. This threshold can be a fixed value determined in advance based on the statistical characteristics of temperature fluctuations under normal operating conditions of the evaporator, or an adaptive threshold dynamically calculated based on the overall distribution of temperature change amplitude values ​​in the current sequence. Each element in the refrigeration evaporation temperature change amplitude sequence is traversed, and each element is compared with the fluctuation amplitude judgment threshold. If the temperature change amplitude value of any element is greater than the threshold, the sampling time corresponding to that element is marked as a moment of severe fluctuation; if it is less than or equal to the threshold, it is marked as a moment of gentle fluctuation. After marking, the time interval covered by consecutive moments of severe fluctuation is identified as a segment of severe fluctuation in refrigeration evaporation temperature, and the time interval covered by consecutive moments of gentle fluctuation is identified as a segment of gentle fluctuation in refrigeration evaporation temperature. These alternating segments of severe and gentle fluctuation constitute the segmented unit sequence of refrigeration evaporation heat absorption state. Each segmented unit corresponds to a continuous time interval and has the state attribute of severe or gentle fluctuation.

[0036] Step 129: Label each segment of the refrigeration evaporation heat absorption state with a refrigeration evaporation heat transfer intensity level label. This label is used to distinguish between strong heat transfer absorption state and weak heat transfer absorption state.

[0037] For each segmented unit of refrigeration evaporation heat absorption state identified in step 128, a heat transfer intensity level label is assigned based on its state attributes. Specifically, segmented units identified as experiencing drastic fluctuations in refrigeration evaporation temperature have large internal temperature fluctuations, indicating that the evaporator underwent relatively intense heat exchange with the surrounding environment during this period, and are therefore labeled with a strong heat transfer absorption state label. Segmented units identified as experiencing moderate fluctuations in refrigeration evaporation temperature have small internal temperature fluctuations, indicating that the heat exchange of the evaporator was relatively stable during this period, and are therefore labeled with a weak heat transfer absorption state label.

[0038] Step 1210: Extract the switching frequency of the cold storage evaporation heat transfer intensity level label between adjacent cold storage evaporation heat absorption state segment units, and generate a cold storage evaporation heat transfer intensity switching frequency descriptor.

[0039] After labeling all segmented units with heat transfer intensity levels in step 129, the labels of adjacent segmented units are compared, and the number of label switching events is counted. Each switch from a strong heat transfer absorption state to a weak heat transfer absorption state, or vice versa, is counted as one valid switch. The total number of switches is divided by the total time span of the segmented units in the refrigeration evaporation heat absorption state to obtain the switching frequency value per unit time. After normalizing the product of this switching frequency value and the sampling period, a refrigeration evaporation heat transfer intensity switching frequency descriptor is obtained. This descriptor reflects, in scalar form, the frequency with which the heat transfer intensity of the refrigeration evaporator alternates between strong and weak states during the heat absorption process.

[0040] Step 1211: Extract the distribution range width of the temperature fluctuation amplitude within each segmented unit of the refrigeration evaporation heat absorption state, and generate a descriptor for the fluctuation amplitude of the refrigeration evaporation heat transfer intensity.

[0041] For each segmented unit of refrigerated evaporative heat absorption state, all original temperature samples within the time interval covered by that segmented unit are acquired. The difference between the maximum and minimum values ​​among these temperature samples is calculated; this difference represents the width of the temperature fluctuation range distribution within that segmented unit. The distribution widths of all segmented units are arranged chronologically to form a sequence. This sequence serves as the descriptor for the fluctuation range of refrigerated evaporative heat transfer intensity. This descriptor, in sequence form, records the range of temperature fluctuations within each segmented unit, reflecting the dispersion of heat transfer intensity over different time periods.

[0042] Step 1212: Based on the refrigeration evaporation heat transfer intensity switching frequency descriptor and the refrigeration evaporation heat transfer intensity fluctuation amplitude descriptor, process the temperature fluctuation sequence of the refrigeration evaporation pipeline wall and create a dual-evaporation side heat absorption feature surface.

[0043] The temperature fluctuation sequence of the refrigeration evaporation pipeline wall is processed in the same manner as steps 127 to 1211. The temperature change amplitude values ​​between adjacent sampling points in the refrigeration evaporation pipeline wall temperature fluctuation sequence are extracted to generate a refrigeration evaporation temperature change amplitude sequence. Based on this amplitude sequence and the fluctuation amplitude judgment threshold, the refrigeration evaporation temperature drastic fluctuation range and the gently fluctuating range are identified as refrigeration evaporation heat absorption state segmentation units. Each refrigeration evaporation heat absorption state segmentation unit is labeled with a refrigeration evaporation heat transfer intensity level label. The switching frequency of the refrigeration evaporation heat transfer intensity level label between adjacent segmentation units is extracted to generate a refrigeration evaporation heat transfer intensity switching frequency descriptor. The distribution range width of the temperature fluctuation amplitude within each refrigeration evaporation heat absorption state segmentation unit is extracted to generate a refrigeration evaporation heat transfer intensity fluctuation amplitude descriptor.

[0044] After obtaining two sets of descriptors for refrigerated evaporation and frozen evaporation, the descriptors for the switching frequency of heat transfer intensity in refrigerated evaporation, the fluctuation amplitude of heat transfer intensity in refrigerated evaporation, and the switching frequency and fluctuation amplitude of heat transfer intensity in frozen evaporation are correlated and superimposed along the time dimension. Since the sampling times of the four temperature sequences are completely synchronized, the time boundaries of each segment unit of refrigerated evaporation correspond to the time boundaries of each segment unit of frozen evaporation on the time axis. The switching frequency descriptors for refrigerated evaporation and frozen evaporation are placed side-by-side on the same time axis, forming two switching frequency curves; similarly, the fluctuation amplitude descriptors for refrigerated evaporation and frozen evaporation are placed side-by-side on the same time axis, forming two fluctuation amplitude curves. These two sets of curves are used as feature data for different channel layers and stacked to form a three-dimensional structured data tensor, namely the dual-evaporation-side heat absorption feature surface. This feature surface retains the temporal information of the evaporation-side heat absorption process in the time dimension, distinguishes the switching rhythm and fluctuation amplitude distribution of the heat transfer intensity of the refrigeration evaporation branch and the freezing evaporation branch in the branch dimension, and simultaneously includes two types of quantitative indicators in the feature dimension: switching frequency and fluctuation amplitude. The dual-evaporation-side heat absorption feature surface also implicitly represents the intensity matching relationship and intensity alternation rhythm characteristics between the refrigeration evaporation heat transfer intensity change curve and the freezing evaporation heat transfer intensity change curve. These implicit relationships are reflected by the relative amplitude difference and phase difference of the two curves on the same time axis.

[0045] Step 130: Input the heat release characteristic surface of the dual condenser side and the heat absorption characteristic surface of the dual evaporator side into the refrigeration cycle coupling mismatch assessment model to perform refrigeration cycle coupling mismatch assessment processing, and obtain the dual system coupling mismatch degree indication information. This dual system coupling mismatch degree indication information is used to characterize the attenuation level of the refrigeration load transfer capacity of the refrigeration branch and the freezing branch under high ambient temperature.

[0046] This step uses the two feature surfaces constructed in step 120 as input data and feeds them into a pre-constructed and trained refrigeration cycle coupling mismatch assessment model. This model is a neural network-based intelligent assessment model whose function is to quantitatively assess the degree of coupling coordination between the condenser-side heat release process and the evaporator-side heat absorption process in a dual-system refrigeration cycle. The model output is a dual-system coupling mismatch indication, which represents the degree to which the load transfer capability between the refrigeration and freezing branches has decayed under current high ambient temperature conditions, in the form of discrete levels or continuous scores.

[0047] Step 131: Analyze the relative positional relationship between the refrigeration condensation heat release trend curve and the freezing condensation heat release trend curve in the dual condensation side heat release characteristic surface, and generate condensation side trend relative offset description information.

[0048] The first set of channel data for the dual-condensation-side heat release characteristic surface includes the refrigeration condensation heat release trend curve and the freezing condensation heat release trend curve. These two curves are continuously plotted on the time axis by the segment temperature change amplitude series in the refrigeration condensation heat release change trend descriptors and the freezing condensation heat release change trend descriptors, respectively. The relative positional relationship of these two curves on the same time axis is analyzed, specifically calculating the difference in amplitude values ​​between the two curves at each time point to obtain the difference time series. Then, statistical features are extracted from this difference time series, calculating its mean, variance, and range. These statistical quantities are combined to form the relative offset description information of the condensation-side trend. This description information quantifies the degree of deviation between the two condensation temperature curves at the amplitude level, reflecting the imbalance in heat release intensity between refrigeration and freezing condensation.

[0049] Step 132: Analyze the degree of difference in trend morphology between the refrigeration condensation heat release trend curve and the freezing condensation heat release trend curve in the dual condensation side heat release characteristic surface, and generate descriptive information on the difference in trend morphology on the condensation side.

[0050] Building upon step 131, a comparative analysis of the morphological characteristics of the refrigeration condensation heat release trend curve and the freezing condensation heat release trend curve is further conducted. The local slope sequences of the two curves are calculated, representing the approximate derivative of temperature with respect to time at each time point. Then, the point-by-point difference between the refrigeration and freezing condensation slope sequences is calculated to obtain a slope difference sequence. The time integral or summation of the absolute value of this slope difference sequence is calculated to obtain a quantitative value of the degree of trend morphological difference. Simultaneously, the ratio of peak values ​​to valley values, as well as the lag or lead relationship of the peak occurrence time, are calculated for the two curves. These morphological comparison results are combined to form a descriptive information on the condensation-side trend morphological difference. This descriptive information quantifies the similarity or dissimilarity of the two condensation curves in their fluctuation patterns, reflecting the synchronicity of the heat release rhythm of the two condensation branches.

[0051] Step 133: Analyze the intensity matching relationship between the refrigeration evaporation heat transfer intensity variation curve and the freezing evaporation heat transfer intensity variation curve in the dual evaporation side heat absorption characteristic surface, and generate evaporation side intensity matching deviation description information.

[0052] The first set of channel data in the dual-evaporation side heat absorption characteristic surface includes the variation curves of refrigerated evaporation heat transfer intensity and frozen evaporation heat transfer intensity. These two curves are plotted on the time axis by the refrigerated evaporation heat transfer intensity fluctuation amplitude descriptors and frozen evaporation heat transfer intensity fluctuation amplitude descriptors, respectively. Point-by-point comparison of these two curves is performed, and the amplitude ratio or difference between the two curves at the same time point is calculated to obtain the intensity matching deviation sequence. Statistical analysis is performed on this deviation sequence, calculating its mean, standard deviation, and maximum deviation value. These statistics are combined to form the evaporation side intensity matching deviation description information. This description information quantifies the relative high and low relationship of the heat transfer intensity of the two evaporation branches within the same time period and the degree of deviation from the equilibrium state.

[0053] Step 134: Analyze the intensity alternation rhythm characteristics between the refrigeration evaporation heat transfer intensity change curve and the freezing evaporation heat transfer intensity change curve in the dual evaporation side heat absorption characteristic surface, and generate evaporation side intensity alternation rhythm description information.

[0054] Phase and periodic analyses were performed on the intensity variation curves of refrigerated and frozen evaporative heat transfer. Local extreme points were identified for each curve, and the fluctuation period length was determined. The order in which the extreme points appeared within the same time window was compared to determine if the change in refrigerated evaporative heat transfer intensity led or lagged behind that of frozen evaporative heat transfer intensity. The average time required for each curve to complete one full alternation of intensity and intensity per unit time was calculated, along with the regularity of the alternation direction. This phase relationship and alternation pattern information was combined into a description of the alternation rhythm of intensity on the evaporation side. This description quantifies the rhythmic patterns and coordination between the two evaporation branches during the alternation of heat transfer intensity.

[0055] Step 135: Perform feature coupling and mismatch classification on the description information of relative offset of condensation trend, description information of difference of condensation trend morphology, description information of intensity matching deviation of evaporation side, and description information of alternation rhythm of intensity of evaporation side, and generate dual-system coupling mismatch degree indication information.

[0056] Step 1351: Input the description information of the relative offset of the condensing side trend, the description information of the difference in the condensing side trend shape, the description information of the intensity matching deviation of the evaporating side, and the description information of the alternation rhythm of the evaporating side intensity into the feature coupling layer of the refrigeration cycle coupling mismatch evaluation model, and perform feature coupling processing across the condensing side and the evaporating side to generate a condensing-evaporating coupling feature vector.

[0057] The refrigeration cycle coupling misalignment assessment model includes a feature coupling layer, which performs cross-domain fusion of multiple input descriptive information. The feature coupling layer first concatenates the relative offset description of the condensing-side trend and the morphological difference description of the condensing-side trend along the feature dimension to form a condensing-side feature vector. It then concatenates the intensity matching deviation description of the evaporating-side trend and the alternation rhythm description of the evaporating-side intensity along the feature dimension to form an evaporating-side feature vector. Next, an attention mechanism or cross-fusion network is used to interactively fuse the condensing-side and evaporating-side feature vectors. Specifically, the attention weights of the condensing-side features on the evaporating-side features and the evaporating-side features on the condensing-side features are calculated. The weighted features are then concatenated again to form a condensing-evaporating coupling feature vector. This coupling feature vector simultaneously contains the misalignment information of both the condensing and evaporating sides, as well as the cross-domain correlation information between the two sides.

[0058] Step 1352: Input the condensation-evaporation coupling feature vector into the misalignment level of the refrigeration cycle coupling misalignment assessment model to determine the attenuation level of the refrigeration load transfer capability of the dual-system refrigerator under the current high ambient temperature.

[0059] The misalignment grading layer is the classification output layer in the refrigeration cycle coupling misalignment assessment model. This layer contains multiple output nodes, each corresponding to a refrigeration load transfer capacity attenuation level. The input to this layer is the condensation-evaporation coupling feature vector generated in step 1351. Through a fully connected mapping and a normalized exponential function, the coupling feature vector is transformed into a probability distribution vector. The dimension of this probability distribution vector is the same as the preset total number of attenuation levels. Each element in the probability distribution vector represents the probability value of each attenuation level corresponding to the current dual-system state. The level corresponding to the element with the highest probability value is taken as the output refrigeration load transfer capacity attenuation level. Attenuation levels can be divided into several grades according to the load transfer capacity from high to low. For example, level 0 indicates no load transfer capacity attenuation, level 1 indicates slight attenuation, level 2 indicates moderate attenuation, and level 3 indicates severe attenuation.

[0060] Step 1353: Generate dual-system coupling mismatch indication information based on the attenuation level of cooling load transfer capacity.

[0061] The cooling load transfer capacity attenuation levels determined in step 1352 are encoded to generate structured dual-system coupling misalignment indication information. This indication information includes a main encoded field for the attenuation level and a confidence score field corresponding to that level. The confidence score is the maximum probability value in the probability distribution vector from step 1352. These fields are combined into a fixed-format indication information data structure, which serves as the output of this step for use in subsequent mode migration path planning steps.

[0062] Step 140: Input the dual-system coupling mismatch degree indication information into the dual-system mode migration path planning strategy, plan the dual-system mode migration path, and generate mode migration path description information including the target operating load direction indication of the refrigeration branch and the target operating load direction indication of the freezing branch.

[0063] Based on the dual-system coupling mismatch indication information obtained in step 130, this step calls the dual-system mode migration path planning strategy to formulate a path scheme for transitioning from the current operating state to the target operating state. The planning strategy determines the load direction that needs to be adjusted for the refrigeration branch and the freezing branch respectively, based on the attenuation level corresponding to the current coupling mismatch and the real-time cooling demand of each compartment of the dual-system refrigerator, and organizes this direction information into mode migration path description information.

[0064] Step 141: Analyze the refrigeration load transfer capacity attenuation level corresponding to the dual system coupling mismatch degree indication information, determine the current coupling mismatch stage of the dual system, and the relative load carrying capacity ratio range of the refrigeration branch and the freezing branch corresponding to this coupling mismatch stage.

[0065] The dual-system coupling mismatch indication information generated in step 130 is parsed to extract the main code field for the refrigeration load transfer capacity attenuation level. Based on this level code, the corresponding coupling mismatch stage identifier is queried from a preset level-stage mapping table. Each coupling mismatch stage corresponds to a relative load-bearing capacity ratio range between the refrigeration branch and the freezing branch. For example, stage A corresponds to a ratio range where the refrigeration branch's load-bearing capacity is significantly lower than the freezing branch's; stage B corresponds to a ratio range where the load-bearing capacities of the two branches are basically balanced; and stage C corresponds to a ratio range where the freezing branch's load-bearing capacity is significantly lower than the refrigeration branch's. Based on the parsed coupling mismatch stage, the current load distribution capacity of the dual system between the two branches can be determined.

[0066] Step 142: Obtain the urgency indicators of the cooling demand in the refrigerator compartment and the cooling demand in the freezer compartment of the dual-system refrigerator during the current cooling cycle.

[0067] The system acquires the current temperature value from the internal temperature sensor of the refrigerator compartment and the user-set target temperature value. It calculates the deviation between the current and target temperatures and divides this deviation by the preset dead zone width for the refrigerator compartment temperature control to obtain an indication of the urgency of cooling demand in the refrigerator compartment. Similarly, it acquires the current temperature value from the internal temperature sensor of the freezer compartment and the user-set target temperature value, calculates the deviation between them, and divides it by the dead zone width for the freezer compartment temperature control to obtain an indication of the urgency of cooling demand in the freezer compartment. Both of these indications are dimensionless scalar values; a larger value indicates a higher urgency of cooling demand in the corresponding compartment.

[0068] Step 143: Determine the load adjustment direction constraint boundaries of the refrigeration branch and the freezing branch based on the coupling mismatch stage.

[0069] Based on the load-bearing capacity ratio range corresponding to the coupling mismatch stage determined in step 141, load adjustment direction constraint boundaries are set for the refrigeration and freezing branches respectively. The load adjustment direction constraint boundaries include an upper limit boundary and a lower limit boundary, corresponding to the limits in the load increase direction and the load decrease direction, respectively. If the current stage is one where the refrigeration branch's load-bearing capacity is significantly low, the load increase direction constraint boundary for the refrigeration branch is set to a tighter limit, meaning a significant increase in the refrigeration branch's load is not allowed. Simultaneously, the load decrease direction constraint boundary for the freezing branch is also set to a tighter limit. If the current stage is one where the freezing branch's load-bearing capacity is significantly low, the opposite constraint settings are applied.

[0070] Step 144: Determine the expected direction of cold storage target load adjustment and the expected direction of freezing target load adjustment based on the urgency indication of refrigeration demand in the cold storage room and the urgency indication of refrigeration demand in the freezing room.

[0071] The urgency indicator of the refrigeration demand in the cold storage compartment obtained in step 142 is compared with a preset urgency threshold. If the urgency indicator exceeds the threshold, the desired direction for adjusting the target load in the cold storage compartment is determined to be an increase in load; otherwise, the current load or a decrease in load is preferred. Similarly, the urgency indicator of the refrigeration demand in the freezer compartment is compared with a preset urgency threshold to determine whether the desired direction for adjusting the target load in the freezer compartment is an increase in load or a non-increase in load. These expectations characterize the ideal load adjustment direction for each branch from the perspective of meeting the cooling demand of the compartment.

[0072] Step 145: Resolve conflicts between the load adjustment direction constraint boundaries of the refrigeration branch and the freezing branch and the corresponding target load adjustment direction expectation, and generate mode migration path description information.

[0073] Step 1451: The conflict resolution process between the load adjustment direction constraint boundary of the refrigeration branch and the expected load adjustment direction of the refrigeration branch is carried out to obtain the target operating load direction indication of the refrigeration branch.

[0074] The constraint boundary for the refrigeration branch load adjustment direction determined in step 143 is compared with the expected target load adjustment direction for refrigeration determined in step 144. If the expected target load adjustment direction for refrigeration falls within the range allowed by the constraint boundary, then the expected target load adjustment direction for refrigeration is directly used as the target operating load direction indicator for the refrigeration branch. If the expected target load adjustment direction for refrigeration exceeds the range allowed by the constraint boundary, for example, the expected load is to increase but the constraint boundary prohibits increasing the load, then conflict resolution is performed, and the target operating load direction indicator is set to the direction that is closest to the expected load allowed by the constraint boundary, i.e., maintaining the current load direction or making a small adjustment.

[0075] Step 1452: The conflict resolution process between the load adjustment direction constraint boundary of the refrigeration branch and the expected load adjustment direction of the refrigeration target is performed to obtain the target operating load direction indication of the refrigeration branch.

[0076] Using the same method as in step 1451, the constraint boundary of the refrigeration branch load adjustment direction is compared with and conflict is resolved with the expected refrigeration target load adjustment direction. If the expected refrigeration target load adjustment direction is within the constraint boundary range, it is directly adopted; if it exceeds the range, the target operating load direction indication of the refrigeration branch is set to the direction that is closest to the expectation allowed by the constraint boundary.

[0077] Step 1453: Combine the target operating load direction indication of the refrigeration branch and the target operating load direction indication of the freezing branch into mode migration path description information.

[0078] The target operating load direction indication of the refrigeration branch obtained in step 1451 and the target operating load direction indication of the freezing branch obtained in step 1452 are combined together according to a preset data format to form mode migration path description information. This description information is a structured data unit, which includes a target direction field for the refrigeration branch, a target direction field for the freezing branch, and a timestamp field to record the time point when the path description information was generated.

[0079] Step 150: Based on the mode migration path description information, synchronously adjust the refrigerant flow cross section adjustment step direction of the refrigeration branch and the refrigerant flow cross section adjustment step direction of the freezing branch to generate a refrigerant delivery and distribution execution command.

[0080] This step transforms the mode migration path description information generated in step 140 into specific actuator control commands. By synchronously adjusting the refrigerant flow cross-section in the refrigeration branch and the freezing branch, the refrigerant is redistributed between the two branches.

[0081] Step 151: Analyze the target operating load direction indication of the refrigeration branch in the mode migration path description information. The target operating load direction indication of the refrigeration branch includes the direction of increasing load or decreasing load of the refrigeration branch.

[0082] The mode migration path description information is parsed to extract the content of the target operating load direction indication field for the refrigeration branch. The direction code value of this field is then parsed to determine whether it belongs to the direction of increasing or decreasing load in the refrigeration branch. An increasing load direction indicates a need to increase the refrigerant flow into the refrigeration evaporator to improve the refrigeration capacity of the refrigerator compartment; a decreasing load direction indicates a need to decrease the refrigerant flow into the refrigeration evaporator.

[0083] Step 152: Analyze the target operating load direction indication of the refrigeration branch in the mode migration path description information. The target operating load direction indication of the refrigeration branch includes the direction of increasing load or decreasing load of the refrigeration branch.

[0084] Using the same method as in step 151, parse the content of the target operating load direction indication field of the refrigeration branch in the mode migration path description information to determine whether it belongs to the direction of increasing or decreasing load of the refrigeration branch. An increasing load direction indicates that the refrigerant flow into the refrigeration evaporator needs to be increased; a decreasing load direction indicates that the refrigerant flow into the refrigeration evaporator needs to be decreased.

[0085] Step 153: Determine the stepper motor rotation direction command of the refrigeration electronic expansion valve according to the direction of increase or decrease of the load of the refrigeration branch. The stepper motor rotation direction command is used to increase or decrease the refrigerant flow cross section of the refrigeration branch.

[0086] In the refrigeration branch, the electronic expansion valve changes the refrigerant flow cross-sectional area by driving the valve needle up and down via a stepper motor. If the direction determined in step 151 is the direction of increasing load in the refrigeration branch, the stepper motor rotation command for the refrigeration electronic expansion valve is determined to be a forward rotation command. This forward rotation command drives the stepper motor to rotate in the direction of valve needle retraction, increasing the flow cross-section and thus increasing the refrigerant flow through the refrigeration evaporator. If the direction is the direction of decreasing load in the refrigeration branch, the stepper motor rotation command for the refrigeration electronic expansion valve is determined to be a reverse rotation command. This reverse rotation command drives the stepper motor to rotate in the direction of valve needle intraction, decreasing the flow cross-section and thus reducing the refrigerant flow through the refrigeration evaporator.

[0087] Step 154: Determine the stepper motor rotation direction command of the refrigeration electronic expansion valve according to the direction of increase or decrease of the load of the refrigeration branch. The stepper motor rotation direction command is used to increase or decrease the refrigerant flow cross section of the refrigeration branch.

[0088] Using the same method as in step 153, the rotation direction command of the stepper motor of the refrigeration electronic expansion valve is determined based on the target operating load direction indication of the refrigeration branch parsed in step 152. If the direction is the direction of increasing load in the refrigeration branch, the rotation direction command of the stepper motor of the refrigeration electronic expansion valve is determined to be a forward rotation command, which increases the refrigerant flow cross-section of the refrigeration branch. If the direction is the direction of decreasing load in the refrigeration branch, the rotation direction command of the stepper motor of the refrigeration electronic expansion valve is determined to be a reverse rotation command, which decreases the refrigerant flow cross-section of the refrigeration branch.

[0089] Step 155: Based on the stepper motor rotation direction command of the refrigeration electronic expansion valve and the stepper motor rotation direction command of the freezing electronic expansion valve, determine the number of stepper motor rotation steps, the speed adjustment direction of the variable speed compressor, and generate the refrigerant delivery and distribution execution command.

[0090] After determining the stepper motor rotation direction commands for the refrigeration and freezing electronic expansion valves respectively, the number of steps required for each stepper motor is further determined. The number of steps is determined as follows: based on the expected load adjustment range contained in the mode migration path description information in step 140, the expected load adjustment range is mapped to the number of rotation steps for the stepper motor; the larger the load adjustment range, the more rotation steps are required. Simultaneously, the speed adjustment direction of the variable-speed compressor is determined based on the consistency of the load adjustment directions of the two branches: if both branches require an increase in load, the compressor speed adjustment direction is determined to be an increase direction; if both branches require a decrease in load, the compressor speed adjustment direction is determined to be a decrease direction; if the required directions of the two branches are inconsistent, the current compressor speed is kept unchanged or slightly adjusted. Finally, the rotation direction command and number of rotation steps of the stepper motor of the refrigeration electronic expansion valve, the rotation direction command and number of rotation steps of the stepper motor of the freezing electronic expansion valve, and the speed adjustment direction of the variable speed compressor are encapsulated according to the predetermined data format of the refrigerant delivery and distribution execution command to generate a complete execution command sequence. This sequence is sent to the electronic expansion valve drive module and the compressor drive module with a preset communication protocol to perform the actual refrigerant flow distribution and adjustment.

[0091] Please refer to the following: Figure 2 and Figure 3 , Figure 2 A schematic diagram showing how to control the refrigerator via a mobile app is provided. Figure 3 A schematic diagram illustrating the interaction between the dual-system refrigerator and the mobile app is shown.

[0092] Depend on Figure 2 and Figure 3 As can be seen, users can view the real-time operating status of the dual-system refrigerator under high ambient temperature conditions via a mobile app, including the current and set temperatures of the refrigerator and freezer compartments, as well as the refrigeration load direction indicators for both circuits. The app interface provides a visual display of the mode transition path, allowing users to intuitively perceive the current coupling misalignment stage of the refrigerator and the system's recommended control strategy. Simultaneously, the refrigerator's main control board interacts bidirectionally with the app via a wireless communication module. On one hand, it uploads collected temperature fluctuation data, coupling misalignment indication information, and mode transition path description information to the app for display and recording. On the other hand, it receives the user's temperature preferences and operating mode commands set via the app, using these as reference constraints in the mode transition path planning strategy to resolve conflicts in the load adjustment direction. Therefore, users can remotely monitor the coupling coordination status of the dual-system refrigeration cycle under high ambient temperature conditions using the app, and obtain auxiliary decision-making information based on the system's automatic adjustments, improving the convenience and transparency of human-machine collaborative control.

[0093] This invention synchronously collects the dual-path wall temperature fluctuation sequences of the condenser and evaporator sides and constructs dual-condenser side heat release characteristic surfaces and dual-evaporator side heat absorption characteristic surfaces, respectively. It incorporates the condenser side heat release process and the evaporator side heat absorption process into a unified coupling analysis framework. Using a refrigeration cycle coupling mismatch assessment model, it comprehensively evaluates the degree of coupling mismatch of the dual system under high ambient temperature from four dimensions: condenser side trend shift, morphological differences, evaporator side intensity matching, and alternation rhythm. This establishes the determination of the refrigeration load transfer capacity attenuation level based on the correlation analysis of the global thermodynamic state of the condenser and evaporator sides. Furthermore, through a dual-system mode migration path planning strategy, it transforms the coupling mismatch degree indication information into mode migration path description information containing the direction indication of the target operating load of both branches. Based on this, it synchronously adjusts the refrigerant flow cross-section adjustment step direction of the refrigeration and freezing branches, realizing closed-loop control from quantitative assessment of coupling mismatch to generation of refrigerant allocation execution commands. This effectively improves the operating condition adaptability and control accuracy of the dual-system refrigerator refrigeration load allocation under high ambient temperature.

[0094] This invention also provides a schematic diagram of the basic structure of a dual-system refrigerator, which includes: processor; A storage device on which computer programs are stored; When the computer program is executed by the processor, the processor implements any of the above-described dual-system refrigerator cooling control methods under high ambient temperature.

[0095] Based on the above, a readable storage medium is provided, on which a program or instructions are stored, and when the program or instructions are executed by a processor, the steps of the above method are implemented.

[0096] In the embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0097] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0098] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0099] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes: USB flash drive, portable hard drive, read-only memory (ROM). Various media that can store program code, such as ROM (ROM-only memory), RAM (random access memory), magnetic disks, or optical disks.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the refrigeration of a dual-system refrigerator under high ambient temperature, characterized in that, include: In response to the high ambient temperature trigger command, the temperature fluctuation sequence of the refrigeration condenser pipe wall and the freezing condenser pipe wall of the dual-system refrigerator are collected, and the temperature fluctuation sequence of the refrigeration evaporator pipe wall and the freezing evaporator pipe wall are collected simultaneously. A dual condensation-side heat release characteristic surface is created based on the temperature fluctuation sequence of the refrigeration condensation pipe wall and the temperature fluctuation sequence of the freezing condensation pipe wall; a dual evaporation-side heat absorption characteristic surface is created based on the temperature fluctuation sequence of the refrigeration evaporation pipe wall and the temperature fluctuation sequence of the freezing evaporation pipe wall. The heat release characteristic surface of the dual condensing side and the heat absorption characteristic surface of the dual evaporating side are input into the refrigeration cycle coupling mismatch assessment model to perform refrigeration cycle coupling mismatch assessment processing, and obtain dual system coupling mismatch degree indication information. The dual system coupling mismatch degree indication information is used to characterize the attenuation level of refrigeration load transfer capacity of the refrigeration branch and the freezing branch under high ambient temperature. The dual-system coupling mismatch degree indication information is input into the dual-system mode migration path planning strategy to plan the dual-system mode migration path and generate mode migration path description information including the target operating load direction indication of the refrigeration branch and the target operating load direction indication of the freezing branch. Based on the mode migration path description information, the refrigerant flow section adjustment step direction of the refrigeration branch and the refrigerant flow section adjustment step direction of the freezing branch are synchronously adjusted to generate a refrigerant delivery and distribution execution command.

2. The refrigeration control method for a dual-system refrigerator under high ambient temperature conditions according to claim 1, characterized in that, The step of creating a dual-condensation-side heat release characteristic surface based on the temperature fluctuation sequence of the refrigeration condensation pipe wall and the temperature fluctuation sequence of the freezing condensation pipe wall includes: Extract the temperature change vector direction between adjacent temperature sampling times from the temperature fluctuation sequence of the refrigeration condenser pipe wall to generate a refrigeration condenser temperature change vector direction sequence. Based on the sequence of vector directions of refrigerated condensing temperature change, identify the reversal point of refrigerated condensing temperature fluctuation, and determine the temperature sampling segment between adjacent reversal points of refrigerated condensing temperature fluctuation as the refrigerated condensing temperature fluctuation segment unit. Each refrigeration condensing temperature fluctuation segment unit is assigned a refrigeration condensing temperature fluctuation segment direction label, which is used to distinguish between temperature rise fluctuation segments and temperature fall fluctuation segments. Adjacent cold storage condensing temperature fluctuation segment units with the same cold storage condensing temperature fluctuation segment direction label are merged to generate a cold storage condensing temperature fluctuation in the same direction merged segment. Extract the time span level and temperature change amplitude level of the paragraphs that are merged in the same direction of the refrigeration condensation temperature fluctuation, and generate a descriptor for the trend of refrigeration condensation heat release. Based on the described trend descriptor for the change in heat release from refrigeration condensation, the temperature fluctuation sequence of the refrigeration condensation pipe wall is processed and a heat release feature surface on both condensation sides is created.

3. The refrigeration control method for a dual-system refrigerator under high ambient temperature conditions according to claim 1, characterized in that, The step of creating a dual-evaporation-side heat absorption characteristic surface based on the temperature fluctuation sequence of the refrigerated evaporation pipe wall and the temperature fluctuation sequence of the frozen evaporation pipe wall includes: Extract the temperature change amplitude values ​​between adjacent temperature sampling times from the temperature fluctuation sequence of the refrigeration evaporation pipeline wall to generate a refrigeration evaporation temperature change amplitude sequence. Based on the sequence of changes in refrigerated evaporation temperature, the refrigerated evaporation temperature fluctuation range and the refrigerated evaporation temperature smooth fluctuation range are identified, and the refrigerated evaporation temperature fluctuation range and the refrigerated evaporation temperature smooth fluctuation range are used as the segmentation unit of the refrigerated evaporation heat absorption state. Each segment of the refrigeration evaporation heat absorption state is labeled with a refrigeration evaporation heat transfer intensity level label, which is used to distinguish between strong heat transfer absorption state and weak heat transfer absorption state. Extract the switching frequency of the cold storage evaporation heat transfer intensity level label between adjacent cold storage evaporation heat absorption state segment units, and generate a cold storage evaporation heat transfer intensity switching frequency descriptor; Extract the distribution range width of the temperature fluctuation amplitude within each segmented unit of the refrigeration evaporation heat absorption state, and generate a descriptor for the fluctuation amplitude of the refrigeration evaporation heat transfer intensity. Based on the refrigeration evaporation heat transfer intensity switching frequency descriptor and the refrigeration evaporation heat transfer intensity fluctuation amplitude descriptor, the temperature fluctuation sequence of the refrigeration evaporation pipeline wall is processed and a dual-evaporation side heat absorption characteristic surface is created.

4. The refrigeration control method for a dual-system refrigerator under high ambient temperature conditions according to claim 3, characterized in that, The process of processing the temperature fluctuation sequence of the refrigeration evaporation pipe wall and creating a dual-evaporation-side heat absorption feature surface based on the refrigeration evaporation heat transfer intensity switching frequency descriptor and the refrigeration evaporation heat transfer intensity fluctuation amplitude descriptor includes: Extract the temperature change amplitude values ​​between adjacent temperature sampling times from the temperature fluctuation sequence of the freeze evaporation pipeline wall to generate a freeze evaporation temperature change amplitude sequence; Based on the sequence of freezing and evaporation temperature change amplitudes, the regions of drastic temperature fluctuations and regions of gradual temperature fluctuations in freezing and evaporation are identified, and these regions are used as segmentation units for the freezing and evaporation heat absorption state. Each segment unit of the freezing-evaporation heat absorption state is labeled with a freezing-evaporation heat transfer intensity level label, which is used to distinguish between strong heat transfer absorption state and weak heat transfer absorption state. Extract the switching frequency of the freezing-evaporation heat transfer intensity level label between adjacent freezing-evaporation heat absorption state segment units, and generate a freezing-evaporation heat transfer intensity switching frequency descriptor; Extract the distribution range width of the temperature fluctuation amplitude within each segmented unit of the freeze-evaporation heat absorption state, and generate a descriptor for the fluctuation amplitude of the freeze-evaporation heat transfer intensity; The refrigeration evaporation heat transfer intensity switching frequency descriptor, the refrigeration evaporation heat transfer intensity fluctuation amplitude descriptor, the freezing evaporation heat transfer intensity switching frequency descriptor, and the freezing evaporation heat transfer intensity fluctuation amplitude descriptor are correlated and superimposed in the time dimension to create a dual-evaporation side heat absorption feature surface. The dual-evaporation side heat absorption feature surface includes the intensity matching relationship and intensity alternation rhythm characteristics between the refrigeration evaporation heat transfer intensity change curve and the freezing evaporation heat transfer intensity change curve.

5. The refrigeration control method for a dual-system refrigerator under high ambient temperature conditions according to claim 1, characterized in that, The process involves inputting the heat release characteristic surface of the dual condenser side and the heat absorption characteristic surface of the dual evaporator side into the refrigeration cycle coupling mismatch assessment model for refrigeration cycle coupling mismatch assessment, thereby obtaining dual-system coupling mismatch indication information, including: The relative positional relationship between the refrigeration condensation heat release trend curve and the freezing condensation heat release trend curve in the dual condensation side heat release characteristic surface is analyzed to generate condensation side trend relative offset description information; Analyze the degree of difference in trend morphology between the refrigeration condensation heat release trend curve and the freezing condensation heat release trend curve in the dual condensation side heat release characteristic surface, and generate descriptive information on the difference in trend morphology on the condensation side. The intensity matching relationship between the refrigeration evaporation heat transfer intensity variation curve and the freezing evaporation heat transfer intensity variation curve in the dual evaporation side heat absorption characteristic surface is analyzed to generate evaporation side intensity matching deviation description information; The alternation rhythm characteristics of intensity between the refrigeration evaporation heat transfer intensity variation curve and the freezing evaporation heat transfer intensity variation curve in the dual evaporation side heat absorption characteristic surface are analyzed to generate evaporation side intensity alternation rhythm description information; The relative offset description information of the condensing side trend, the morphological difference description information of the condensing side trend, the intensity matching deviation description information of the evaporating side, and the alternation rhythm description information of the evaporating side intensity are subjected to feature coupling and mismatch classification to generate dual-system coupling mismatch indication information.

6. The refrigeration control method for a dual-system refrigerator under high ambient temperature conditions according to claim 5, characterized in that, The process of performing feature coupling and mismatch classification on the description information of the relative offset of the condensation side trend, the description information of the difference in the morphology of the condensation side trend, the description information of the intensity matching deviation of the evaporation side, and the description information of the alternation rhythm of the evaporation side intensity, to generate dual-system coupling mismatch indication information includes: The relative offset description information of the condensing side trend, the morphological difference description information of the condensing side trend, the intensity matching deviation description information of the evaporating side, and the alternation rhythm description information of the evaporating side intensity are input into the feature coupling layer of the refrigeration cycle coupling mismatch evaluation model to perform feature coupling processing across the condensing side and the evaporating side, and generate a condensing-evaporating coupling feature vector. The condensation-evaporation coupling feature vector is input into the imbalance level of the refrigeration cycle coupling imbalance assessment model to determine the attenuation level of the refrigeration load transfer capacity of the dual-system refrigerator under the current high ambient temperature. Based on the attenuation level of the cooling load transfer capacity, information indicating the degree of coupling mismatch between the two systems is generated.

7. The refrigeration control method for a dual-system refrigerator under high ambient temperature conditions according to claim 1, characterized in that, The process involves inputting the dual-system coupling misalignment indication information into the dual-system mode migration path planning strategy, planning the dual-system mode migration path, and generating mode migration path description information that includes the target operating load direction indication for the refrigeration branch and the target operating load direction indication for the freezing branch, including: The refrigeration load transfer capacity attenuation level corresponding to the dual system coupling mismatch degree indication information is analyzed to determine the current coupling mismatch stage of the dual system. The coupling mismatch stage corresponds to the relative load carrying capacity ratio range of the refrigeration branch and the freezing branch. Obtain the urgency indication of the cooling demand in the refrigerator compartment and the urgency indication of the cooling demand in the freezer compartment of the dual-system refrigerator during the current cooling cycle; The load adjustment direction constraint boundaries of the refrigeration branch and the freezing branch are determined based on the coupling misalignment stage. The desired direction of cold storage target load adjustment and the desired direction of cold storage target load adjustment are determined based on the urgency indication of the refrigeration demand of the cold storage compartment and the urgency indication of the refrigeration demand of the freezer compartment. The conflict between the load adjustment direction constraint boundary of the refrigeration branch, the load adjustment direction constraint boundary of the freezing branch, and the corresponding target load adjustment direction expectation is resolved to generate mode migration path description information.

8. The refrigeration control method for a dual-system refrigerator under high ambient temperature conditions according to claim 7, characterized in that, The conflict resolution process between the load adjustment direction constraint boundaries of the refrigeration branch, the load adjustment direction constraint boundaries of the freezing branch, and the corresponding expected target load adjustment direction generates mode migration path description information, including: The conflict between the load adjustment direction constraint boundary of the refrigeration branch and the expected target load adjustment direction of the refrigeration branch is resolved to obtain the target operating load direction indication of the refrigeration branch. The conflict between the load adjustment direction constraint boundary of the refrigeration branch and the expected target load adjustment direction of the refrigeration branch is resolved to obtain the target operating load direction indication of the refrigeration branch. The target operating load direction indication of the refrigeration branch and the target operating load direction indication of the freezing branch are combined into mode migration path description information.

9. The refrigeration control method for a dual-system refrigerator under high ambient temperature conditions according to claim 1, characterized in that, The step of synchronously adjusting the refrigerant flow cross-section adjustment step direction of the refrigeration branch and the refrigerant flow cross-section adjustment step direction of the freezing branch according to the mode migration path description information, and generating a refrigerant delivery and distribution execution command, includes: The target operating load direction indication of the refrigeration branch is parsed from the mode migration path description information. The target operating load direction indication of the refrigeration branch includes the direction of increasing load or decreasing load of the refrigeration branch. The target operating load direction indication of the refrigeration branch is parsed from the mode migration path description information. The target operating load direction indication of the refrigeration branch includes the direction of increasing load or decreasing load of the refrigeration branch. The stepper motor rotation direction command of the refrigeration electronic expansion valve is determined according to the direction of increase or decrease of the load of the refrigeration branch. The stepper motor rotation direction command is used to increase or decrease the refrigerant flow cross section of the refrigeration branch. The stepper motor rotation direction command of the refrigeration electronic expansion valve is determined according to the direction of increase or decrease of the load of the refrigeration branch. The stepper motor rotation direction command is used to increase or decrease the refrigerant flow cross section of the refrigeration branch. Based on the stepper motor rotation direction commands of the refrigeration electronic expansion valve and the stepper motor rotation direction commands of the freezing electronic expansion valve, the number of stepper motor rotation steps, the speed adjustment direction of the variable speed compressor, and the refrigerant delivery and distribution execution commands are determined.

10. A dual-system refrigerator, characterized in that, include: processor; A storage device having a computer program stored thereon, which, when executed by the processor, causes the processor to implement the dual-system refrigerator refrigeration control method under high ambient temperature as described in any one of claims 1-9.

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