Refrigerator dynamic refrigerating capacity distribution control method based on multi-chamber temperature prediction

Abstract

The invention provides a refrigerator dynamic refrigerating capacity distribution control method based on multi-chamber temperature prediction. The refrigerator dynamic refrigerating capacity distribution control method comprises the steps that the cooling rate and the heating rate of each chamber are calculated in real time; on the basis of the temperature difference between the current temperature and the set shutdown point and the cooling rate, the duration of the current refrigeration chamber reaching the shutdown point is predicted; on the basis of the temperature difference between the current temperature and the set starting point and the heating rate, the duration of the non-refrigeration chamber reaching the starting point is predicted; comparing the duration of reaching the stop point with the duration of reaching the start-up point; and the rotating speed of the compressor is dynamically adjusted according to the comparison result, so that the refrigerating capacity is redistributed, and the temperatures of all the chambers are balanced. The time for reaching the stop point and the start point is predicted according to the cooling rate and the heating rate, the rotating speed of the compressor is reasonably controlled according to comparison of the cooling time and the heating time of the chambers, refrigeration of all the chambers reaches dynamic balance, the rotating speed of the compressor is dynamically controlled, the refrigerating capacity is distributed, refrigeration of all the chambers of the refrigerator is reasonably balanced, and the refrigerating efficiency is improved. The refrigerator performance is improved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerator cooling capacity distribution, and in particular to a refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction. Background Art

[0002] Multi-compartment refrigerators—those with a refrigerator, a warming chamber, and a freezer—must each maintain a specific temperature independently (e.g., 2-8°C for refrigerators and ≤-18°C for freezers). The compressor, as a refrigeration component, has a refrigeration start / stop logic that directly impacts compartment temperature stability and overall unit energy efficiency.

[0003] The existing compressor control solution uses temperature sensors to monitor the temperature of each compartment. When the temperature in any compartment exceeds a threshold, the compressor starts and prioritizes cooling that compartment. If the cooling rate is slower than expected (e.g., due to high ambient temperature or heavy load), the system continues cooling for a preset maximum protection period (e.g., one hour in the refrigerator) before forcing the switch to another compartment. This solution is simple in logic, cost-effective, and prevents excessive cooling resource usage by a single compartment.

[0004] However, this control scheme cannot predict the cooling time of the current compartment in the event of slow cooling. Therefore, it will continue cooling the current compartment until it reaches a maximum protection value, such as a maximum cooling time of one hour for the refrigerator compartment. If it exceeds one hour, cooling will switch to other compartments regardless of whether the shutdown point has been reached. Therefore, this situation may cause the refrigerator compartment to fail to reach the shutdown point, and in single-system refrigerators, the freezer compartment may also overcool. Summary of the Invention

[0005] To solve the problem that the existing compressor control solution cannot reach the shutdown point in the refrigeration compartment and may cause the freezer compartment to be overcooled in the case of a single-system refrigerator.

[0006] The present application provides a refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction, comprising the steps of:

[0007] Real-time calculation of cooling rate and heating rate of each compartment;

[0008] Based on the temperature difference between the current temperature and the set shutdown point and the cooling rate, predict the time it takes for the current refrigeration compartment to reach the shutdown point;

[0009] Based on the temperature difference between the current temperature and the set start point and the heating rate, predict the time it takes for the non-refrigerated compartment to reach the start point;

[0010] Comparing the time taken to reach the shutdown point with the time taken to reach the startup point;

[0011] The compressor speed is dynamically adjusted based on the comparison results to redistribute the cooling capacity and balance the temperature among the compartments.

[0012] In a feasible implementation, before the real-time calculation of the cooling rate and heating rate of each compartment, the method further includes the following steps:

[0013] Analyze the temperature change trend of each compartment during refrigeration and identify the connection mode, which includes series connection and parallel connection;

[0014] If during cooling, the compartment temperature drops synchronously, it is determined to be the series connection;

[0015] If the compartment temperature rises during cooling, it is determined to be the parallel connection.

[0016] In one feasible implementation, the steps of calculating the cooling rate and heating rate of each compartment in real time include:

[0017] The cooling rate is calculated by dividing the temperature difference between the start point and the stop point of the compartment by the corresponding cooling time;

[0018] The heating rate is calculated by dividing the temperature difference between the compartment from the shutdown point to the startup point by the corresponding heating time.

[0019] In a feasible implementation, the step of dynamically adjusting the compressor speed according to the comparison result includes:

[0020] When it is predicted that the time length of the current refrigeration compartment reaching the shutdown point is longer than the time length of any of the non-refrigeration compartments reaching the startup point, increasing the speed of the compressor;

[0021] When it is predicted that the time duration for the current refrigeration compartment to reach the shutdown point is less than or equal to the time duration for all the non-refrigeration compartments to reach the startup points, the current compressor speed is maintained until the shutdown point.

[0022] In a feasible implementation, the compressor speed adjustment follows a proportional relationship;

[0023] The proportional relationship is:

[0024] When the compressor speed is increased, the cooling time is shortened according to the ratio of the compressor speed increase;

[0025] When the compressor speed is reduced, the cooling time is extended according to the ratio of the compressor speed reduction.

[0026] In a feasible implementation, the steps are further included:

[0027] After detecting that the compartment door is open, recalculate the cooling rate and heating rate of the compartment with the door open.

[0028] In a feasible implementation, the recalculating the cooling rate and heating rate of the switch compartment further comprises the steps of:

[0029] By comparing the change in the cooling rate of the compartment with the door opened before and after the door is opened, the increase or decrease in load is determined;

[0030] If the cooling rate decreases, it is determined that the load increases;

[0031] If the cooling rate increases, it is determined that the load is reduced.

[0032] In a feasible implementation, after dynamically adjusting the compressor speed according to the comparison result, the method further includes switching the refrigeration compartment based on the time comparison result:

[0033] If the non-refrigeration compartment has reached the start-up point before the current refrigeration compartment reaches the shutdown point, the refrigeration is switched to the non-refrigeration compartment;

[0034] If multiple rooms reach the power-on point at the same time, the cooling order of the rooms will be assigned according to the preset priority.

[0035] In a feasible implementation, the step of reallocating cooling capacity includes:

[0036] After the compressor stops, the refrigeration fan is started to cool the non-refrigerated compartment using the residual cooling capacity until the non-refrigerated compartment reaches the shutdown point or the refrigeration compartment reaches the startup point.

[0037] In a feasible implementation, after a preset period, the cooling rate and heating rate of each compartment are recalculated, the time to reach the shutdown point and the time to reach the startup point are predicted, and the method is executed in a loop.

[0038] The present application provides a refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction. The method predicts the time to reach the shutdown point and the startup point according to the cooling rate and the heating rate. Then, based on the comparison of the cooling and heating time of the compartments, the compressor speed is reasonably controlled to achieve dynamic balance of cooling in each compartment. The compressor speed is dynamically controlled to distribute the cooling capacity, so as to achieve reasonable balance of cooling in each compartment of the refrigerator and improve refrigerator performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are incorporated into and constitute a part of this specification, illustrate embodiments consistent with the implementation of the present invention, and together with the description, serve to explain the principles of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the implementation of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0040] Figure 1 This is a flow chart of a method for controlling dynamic cooling capacity distribution of a refrigerator based on multi-compartment temperature prediction according to an exemplary embodiment of the present application;

[0041] Figure 2 It is a flow chart of a method for controlling dynamic cooling capacity distribution of a refrigerator based on multi-compartment temperature prediction, shown in another exemplary embodiment of the present application. DETAILED DESCRIPTION

[0042] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of the implementation of the example embodiments of the present invention.

[0043] The current method of using temperature points to control the start-up of the compressor is to cool the cold storage room and the variable temperature room separately. When the cooling is slow, the cooling time of the current compartment cannot be predicted in time, so the current compartment will be cooled until a maximum protection value is reached. For example, the maximum cooling time of the cold storage room is 1 hour. If it exceeds 1 hour, regardless of whether the shutdown point is reached, the cooling will be switched to other compartments. In this case, two problems will arise. One is that the cold storage room cannot reach the shutdown point, and the other is that if it is a single system, the freezer compartment will be overcooled. Due to the above problems, the above problems can be solved by using the cooling rate to predict the cooling time of the compartment, reasonably adjusting the speed, and dynamically allocating the cooling capacity to multiple compartments, so that the temperature of the compartment is more balanced and uniform.

[0044] To solve the above problems, refer to Figure 1 As shown, the embodiment of the present application provides a refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction, comprising the steps of:

[0045] S100: Calculate the cooling rate and heating rate of each compartment in real time;

[0046] S200: Based on the temperature difference between the current temperature and the set shutdown point and the cooling rate, predict the time it takes for the current refrigeration compartment to reach the shutdown point;

[0047] S300: Based on the temperature difference between the current temperature and the set start point and the heating rate, predict the time it takes for the non-refrigerated compartment to reach the start point;

[0048] S400: Comparing the time taken to reach the shutdown point with the time taken to reach the startup point;

[0049] S500: Dynamically adjust the compressor speed according to the comparison result to redistribute the cooling capacity and balance the temperature of each compartment.

[0050] Specifically, during the operation of the refrigerator, the temperature data of each compartment is collected in real time through the temperature sensor, and the temperature changes in the cooling stage (compressor running) and the non-cooling stage (compressor stopped) are recorded. In the cooling stage, the complete cooling cycle from the start point (such as the start temperature of the refrigerator compartment is set to 5°C) to the stop point (such as the stop temperature of the refrigerator compartment is set to 3°C) is selected, and the temperature difference (5°C-3°C=2°C) is calculated and divided by the length of the cycle (such as 10 minutes) to obtain the cooling rate (2°C / 10 minutes=0.2°C / minute). In the non-cooling stage, the complete heating cycle from the stop point to the next start point is selected, and the temperature difference (3°C-5°C=the absolute value of -2°C) is calculated and divided by the length of the cycle (such as 15 minutes) to obtain the heating rate (2°C / 15 minutes≈0.13°C / minute).

[0051] Furthermore, the predicted time for the current cooling compartment to reach the shutdown point (T1) is compared with the predicted time for the non-cooling compartment to reach the startup point (T2). If T1 > T2, the cooling compartment will take longer to shut down, while the non-cooling compartment will trigger the startup request more quickly. In this case, the compressor speed is increased to shorten T1 and ensure that the non-cooling compartment does not overheat due to waiting. If T1 ≤ T2, the current speed is maintained until the shutdown point to avoid frequent compressor startups.

[0052] In this embodiment, the calculation of the cooling rate and the heating rate provides a data basis for the prediction. By quantifying the temperature change rate, the system can accurately predict when the compartment needs to start or stop refrigeration, avoiding temperature fluctuations caused by lagging or leading control. For example, if the cooling rate is too fast, the compartment temperature may be lower than the shutdown point due to excess cooling capacity, resulting in energy waste; if the heating rate is too fast, the compartment temperature may be higher than the startup point due to insufficient cooling capacity, affecting the preservation effect. By dynamically adjusting the compressor speed, the cooling capacity is accurately matched to the actual demand, reducing energy waste. For example, when the refrigerator compartment is refrigerated, if its downtime is predicted to be longer than the freezer startup time, the compressor speed is increased to shorten the downtime, avoiding the freezer compartment temperature rising due to delayed refrigeration. Make the temperature fluctuation control of each compartment more accurate, and further improve the energy efficiency ratio

[0053] In some embodiments of the present application, before the step S100 of calculating the cooling rate and heating rate of each compartment in real time, the following steps are further included:

[0054] S50: Analyze the temperature change trend of each compartment during refrigeration and identify the connection mode, which includes series connection and parallel connection;

[0055] S51: If the compartment temperature drops synchronously during cooling, it is determined to be a series connection;

[0056] S52: If the compartment temperature rises during cooling, it is determined to be a parallel connection.

[0057] When the refrigerator is first operated, the compressor starts in cooling mode and continuously monitors temperature changes in each compartment. If the temperatures in all compartments begin to drop simultaneously, it is considered a series connection. Series connection means the air duct system is designed so that cold air flows through each compartment sequentially. If the temperature in only the currently cooling compartment drops while the temperatures in other non-cooling compartments rise, it is considered a parallel connection. Parallel connection means each compartment has its own independent air duct, so cold air flows only into the cooling compartment.

[0058] It's understandable that identifying the connection method is a prerequisite for cooling capacity allocation. In a series connection, cold air must flow through each compartment sequentially, allowing residual cooling after a refrigeration compartment shuts down to be utilized by subsequent compartments. In a parallel connection, cold air flows only to the current refrigeration compartment, requiring synchronous control of multiple compartments through compressor speed regulation. For example, in a series connection, if the temperature of the variable temperature compartment approaches the start-up point after the refrigerator compartment shuts down, the residual cooling can be used to preemptively start the variable temperature compartment, reducing the number of compressor starts and stops.

[0059] Therefore, the connection method judgment affects the subsequent cooling rate calculation. In a series connection, the heating rate of the non-refrigerated compartment may be reduced by the residual cooling capacity, so the interference data needs to be eliminated during the calculation. In a parallel connection, the heating rate of the non-refrigerated compartment is completely determined by the ambient heat load and can be directly used for prediction.

[0060] In this embodiment, the system identifies the connection method and designs targeted cooling strategies. In a series connection, residual cooling capacity is utilized to reduce compressor operating time. In a parallel connection, cooling capacity is precisely controlled in the order in which each compartment is cooled, thus avoiding wasted cooling capacity. For example, when multiple compartments in a parallel refrigerator require cooling simultaneously, cooling capacity is allocated based on priority, ensuring stable temperatures in critical compartments.

[0061] In some embodiments of the present application, step S100 of calculating the cooling rate and heating rate of each compartment in real time specifically includes:

[0062] S110: Calculate the cooling rate by dividing the temperature difference between the start point and the stop point of the compartment by the corresponding cooling time;

[0063] S120: Calculate the heating rate by dividing the temperature difference between the compartment from the shutdown point to the startup point by the corresponding heating time.

[0064] In this embodiment, taking the refrigerator compartment as an example, the cooling process data from the start point to the stop point is recorded. For example, when the start point temperature is 5°C and the stop point temperature is 3°C, the temperature difference ΔT1 = 2°C, the cooling time t1 = 10 minutes, and the cooling rate v1 = ΔT1 / t1 = 0.2°C / minute. In the non-refrigeration stage, the heating process data from the stop point (3°C) to the next start point (5°C) is recorded: the temperature difference ΔT2 = 2°C, the heating time t2 = 15 minutes, and the heating rate v2 = ΔT2 / t2 ≈ 0.13°C / minute.

[0065] Rate calculations must be based on complete cycle data to avoid interference from local fluctuations. For example, if only the first 5 minutes of cooling phase data are recorded (temperature drops by 1°C), v1 is calculated to be 0.2°C / minute. However, the actual temperature drop of 2°C takes 10 minutes, so v1 should be 0.2°C / minute. Data integrity must be ensured. The same applies to heating rates; sudden interference, such as door opening, must be excluded.

[0066] The associated rate calculation results of this embodiment and the previous embodiment are directly used to predict the duration of the shutdown and startup points. In a series connection, the heating rate of the non-refrigerated compartment may be lower than the calculated value due to residual cooling capacity, so the prediction model needs to be modified based on the connection method. In a parallel connection, the rate calculation results can be directly substituted into the formula.

[0067] The rate calculation of this embodiment reduces the prediction error, ensures timely adjustment of the compressor speed, and avoids over-adjustment or under-adjustment.

[0068] In some embodiments of the present application, step S500 of dynamically adjusting the compressor speed according to the comparison result specifically includes:

[0069] S510: When it is predicted that the time length of the current refrigeration compartment reaching the shutdown point is longer than the time length of any non-refrigeration compartment reaching the startup point, the compressor speed is increased;

[0070] S520: When it is predicted that the time duration for the current refrigeration compartment to reach the shutdown point is less than or equal to the time duration for all non-refrigeration compartments to reach the startup points, the current compressor speed is maintained until the shutdown point.

[0071] Specific Operation and Implementation: Taking the refrigerator compartment as an example, its predicted downtime, T1, is 8 minutes. Meanwhile, the predicted downtimes for non-refrigerated compartments, such as the warm and cool rooms and the freezer, are T2 = 5 minutes and T3 = 6 minutes, respectively. Because T1 > T2 and T1 > T3, the system determines that the compressor speed needs to be increased. If the current speed is 3000 rpm, it can be increased to 3600 rpm, shortening T1 and bringing it closer to T2 = 5 minutes and T3 = 6 minutes.

[0072] In this embodiment, the purpose of increasing the compressor speed in step S510 is to prevent non-refrigerated compartments from overheating due to waiting. For example, if the original speed is maintained, the refrigerated compartment will wait longer, while the variable temperature compartment needs to be cooled as quickly as possible. During this time, the temperature of the variable temperature compartment may rise, affecting the freezing effect. By increasing the speed, the refrigerated compartment shuts down earlier, allowing the variable temperature compartment to be cooled in a timely manner.

[0073] This embodiment uses conditional judgment to proactively balance the needs of multiple compartments. For example, in a multi-door scenario, where users frequently put food in and out, the temperature in non-refrigerated compartments rises faster, and the predicted power-on time is shortened. In this case, increasing the speed prioritizes high-demand compartments to avoid temperature runaway.

[0074] In some embodiments of the present application, the compressor speed adjustment follows a proportional relationship; the proportional relationship is: when the compressor speed is increased, the cooling time is shortened according to the ratio of the compressor speed increase; when the compressor speed is reduced, the cooling time is extended according to the ratio of the compressor speed reduction.

[0075] Specifically, if the current speed is N and the increase ratio is k (k > 1), the new speed is N × k, and the cooling time is shortened to 1 / k of the original time. For example, if the original speed is 3000 rpm and the cooling time is 10 minutes, increasing it to 3600 rpm, that is, the increase ratio k = 1.2, the new cooling time is: 10 × (1 / 1.2) ≈ 8.33 minutes. Similarly, if the speed is reduced to 2400 rpm, that is, the increase ratio k = 0.8, the cooling time is extended to 10 × (1 / 0.8) = 12.5 minutes.

[0076] This embodiment uses a proportional relationship to ensure that speed adjustments correspond to cooling duration. When a speed increase is determined, the system calculates the new speed based on the target reduction ratio, rather than adjusting in fixed steps. This improves adjustment accuracy. Proportional control significantly reduces cooling duration prediction errors and further improves compressor operating efficiency.

[0077] In some embodiments of the present application, the method further comprises the steps of:

[0078] S600: After detecting that the compartment door is open, recalculate the cooling rate and heating rate of the compartment with the door open.

[0079] When the refrigerator door is opened for more than 1 minute, the temperature data before and after the door is opened is recorded. The temperature rises due to the entry of hot air. After the door is closed, the refrigeration is restarted and the time from temperature rise to temperature drop is recorded to calculate the new cooling rate and heating rate.

[0080] Understandably, opening the door can cause a sudden change in compartment temperature, rendering the original rate data invalid and requiring recalculation to accurately predict subsequent demand. The recalculated rate replaces the original data and is used to predict the duration of subsequent shutdown and startup points, and to correct the connection method judgment. By dynamically updating the rate, the system can quickly adapt to load changes, avoiding premature compressor shutdown and compartment temperature rise due to too short a prediction time.

[0081] In some embodiments of the present application, the step S600 of recalculating the cooling rate and heating rate of the switch compartment further includes:

[0082] S610: Determine the load increase or decrease by comparing the cooling rate changes of the compartment with the door opened before and after the door is opened;

[0083] S620: If the cooling rate decreases, it is determined that the load increases;

[0084] S630: If the cooling rate increases, it is determined that the load is reduced.

[0085] The load determination in this embodiment provides a basis for adjusting the cooling strategy. For example, when the load increases, the compressor speed may be increased or the cooling time may be extended; when the load decreases, the speed may be reduced or the cooling time may be shortened. By quantifying the degree of load change by the direction of the rate change, such as an increase or decrease, the cooling strategy is more targeted, providing high temperature control accuracy.

[0086] In some embodiments of the present application, reference Figure 2 As shown, after step S500 of dynamically adjusting the compressor speed according to the comparison result, the following steps are further included:

[0087] S530: Switching the cooling compartment based on the time comparison result;

[0088] S531: If the non-refrigeration compartment has reached the start-up point before the current refrigeration compartment reaches the shutdown point, the cooling mode is switched to the non-refrigeration compartment;

[0089] S532: If multiple rooms reach the power-on point at the same time, the cooling order of the rooms is allocated according to the preset priority.

[0090] Using the refrigerator compartment as an example, the predicted downtime is T1 = 8 minutes. The predicted downtimes for non-refrigerated compartments, such as the variable temperature room and freezer, are T2 = 5 minutes and T3 = 6 minutes, respectively. Because T2 < T1 and T3 < T1, the variable temperature room temperature reaches the start-up point after the fifth minute of refrigerator compartment cooling, and the system switches to the variable temperature room.

[0091] If multiple rooms reach the power-on point at the same time, such as both the variable temperature room and the freezer room need to be refrigerated, the refrigeration order is assigned according to the preset priority. If the priority is set to: freezer room > variable temperature room > refrigerator room, the freezer room will be selected first.

[0092] This embodiment avoids overheating in non-refrigerated compartments. For example, if you insist on cooling the refrigerator compartment, the variable temperature compartment may overheat while you're waiting, affecting food preservation. After switching, the variable temperature compartment can be cooled immediately. This switching logic balances the needs of multiple compartments.

[0093] In some embodiments of the present application, the step S500 of reallocating cooling capacity further includes:

[0094] S540: After the compressor stops, the refrigeration fan is started to use the residual cooling capacity to cool the non-refrigerated compartments until the non-refrigerated compartments reach the shutdown point or the refrigerated compartments reach the startup point.

[0095] This embodiment increases the utilization of residual cooling capacity to reduce the number of compressor starts and stops. For example, after switching to variable temperature room cooling, the temperature still needs to be further reduced. After the compressor stops, since the evaporator still has cooling capacity, the fan can be used to accelerate cooling and shorten the cooling time. Through fan circulation, the variable temperature room temperature can be kept within a certain range without starting the compressor, saving energy. By utilizing residual cooling capacity, the compressor downtime is extended, saving energy, and extending the service life of the compressor.

[0096] In some embodiments of the present application, the above-mentioned dynamic refrigeration capacity distribution control method for refrigerators based on multi-compartment temperature prediction recalculates the cooling rate and heating rate of each compartment after a preset period, predicts the time to reach the shutdown point and the time to reach the startup point, and executes the method in a loop.

[0097] For example, the system performs a complete update every 2 hours, recalculates the cooling rate and heating rate of each compartment based on the most recent cooling cycle data and non-cooling cycle data, and re-predicts the shutdown and startup time.

[0098] The periodic update of this embodiment keeps the prediction error stable over time, avoiding performance degradation due to environmental changes.

[0099] This application achieves precise control of refrigerator operation through multi-compartment temperature prediction and dynamic cooling capacity allocation. The following scenario illustrates this concept, based on a single-system refrigerator with a default series connection and shared residual cooling capacity. Each scenario executes a corresponding action based on a comparison of the predicted durations.

[0100] All duration variables are defined as:

[0101] Tc1: The predicted time it takes for the refrigerator compartment to reach the shutdown point; Tb1: The predicted time it takes for the variable temperature room to reach the shutdown point; Td1: The predicted time it takes for the freezer compartment to reach the shutdown point; Tc2: The predicted time it takes for the refrigerator compartment to reach the startup point. Tb2: The predicted time it takes for the variable temperature room to reach the startup point. Td2: The predicted time it takes for the freezer compartment to reach the startup point.

[0102] Tc11, Tb11, Td11: The second predicted time for the refrigerator compartment, variable temperature room and freezer compartment to reach the shutdown point after the refrigeration switch is switched; Tc22, Tb22, Td22: The second predicted time for the refrigerator compartment, variable temperature room and freezer compartment to reach the startup point after the refrigeration switch is switched.

[0103] Specifically, when the cold storage room is refrigerated, the predicted duration of each compartment is calculated in real time, and the compressor speed is adjusted or the refrigeration compartment is switched after comparing the duration.

[0104] Scenario 1: When Tc1 < Tb2 and Tc1 < Td1; after the refrigerating chamber finishes refrigerating, start to refrigerate the variable temperature chamber; after switching to refrigerating the variable temperature chamber, detect the difference between the current temperature of the variable temperature chamber and the stopping point temperature, and calculate the time Tb11 required for the variable temperature chamber to reach the stopping point, the time Tc22 for the refrigerating chamber to reach the starting point, and the remaining time Td11 for the freezing chamber to reach the stopping point.

[0105] The logic after switching to refrigerating the variable temperature chamber is as follows:

[0106] 1) If Tb11 < Tc22 and Tb11 > Td11. Then maintain the current compressor speed. The freezing chamber reaches the stopping point first, the compressor stops, and the freezing fan starts to run at medium and high speeds. At this time, the compressor speed can be reduced, and the rates (Tc1, Tb1, Td1) are recalculated.

[0107] 2) If Tb11 < Tc22 and Tb11 < Td11. Then the variable temperature chamber reaches the stopping point first, and the refrigerating chamber reaches the starting point later; the variable temperature chamber reaches the stopping point first, and the freezing chamber reaches the stopping point later; then after refrigerating at the current speed (it can cool down), switch to refrigerating the refrigerating chamber until the freezing chamber reaches the stopping point.

[0108] 3) If Tb11 > Tc22 and Tb11 > Td11. Then the variable temperature chamber reaches the stopping point later, and the refrigerating chamber reaches the starting point first; while refrigerating the variable temperature chamber, the freezing chamber reaches the stopping point first, and the variable temperature chamber reaches the stopping point later. At this time, the compressor stops, the freezing fan starts, and the variable temperature air door and the refrigerating air door are opened for refrigerating.

[0109] When Td11 < Tc22, that is, the variable temperature chamber reaches the stopping point first, and then switch to refrigerating the refrigerating chamber.

[0110] When Td11 > Tc22, that is, the freezing chamber reaches the stopping point first, the variable temperature chamber has not reached the stopping point, and the refrigerating chamber exceeds the starting point.

[0111] 4) If Tb11 > Tc22 and Tb11 < Td11. While refrigerating the variable temperature chamber, the refrigerating chamber reaches the starting point first; while refrigerating the variable temperature chamber, the freezing chamber reaches the stopping point later; when the refrigerating chamber reaches the starting point, switch to refrigerating the refrigerating chamber.

[0112] Scenario 2: When Tc1 < Tb2 and Tc1 > Td1; the freezing chamber reaches the stopping point first. After the refrigerating chamber reaches the stopping point by refrigerating, the variable temperature chamber reaches the starting point last. Then the compressor stops, the freezing fan starts, and the residual cold is used to supply cold to the refrigerating chamber and the variable temperature chamber until the refrigerating chamber and the variable temperature chamber reach the stopping point or the freezing chamber reaches the starting point.

[0113] Scenario 3: When Tc1 > Tb2 and Tc1 > Td1; when the variable temperature chamber reaches the starting point before the refrigerating chamber finishes refrigerating; when refrigerating the refrigerating chamber, the freezing chamber reaches the stopping point first;

[0114] If Tb2 > Td1 and the freezer compartment reaches the shutdown point first, when the freezer compartment reaches the shutdown point, the compressor stops, and the freezer fan starts to cool the refrigerator compartment and the variable temperature compartment.

[0115] If Tb2 < Td1, when the variable temperature compartment reaches the startup point, the cooling mode switches to the variable temperature compartment.

[0116] Scenario 4: When Tc1 > Tb2 and Tc1 < Td1; when the refrigerator compartment and the freezer compartment are cooling and the refrigerator compartment has not reached the shutdown point, to prevent the variable temperature compartment from overheating, at the moment of Tb2, the cooling mode switches to the variable temperature compartment.

[0117] 1) If Tc2 > Tb11 and Tb11 < Td11. Then the variable temperature compartment reaches the shutdown point first, the freezer compartment reaches the shutdown point later, and the refrigerator compartment reaches the startup point later. After the variable temperature compartment reaches the shutdown point, the cooling mode switches to the refrigerator compartment.

[0118] 2) If Tc2 < Tb11 and Tb11 < Td11. Then when the refrigerator compartment reaches the startup point, the cooling mode switches to the refrigerator compartment.

[0119] 3) If Tc2 > Tb11 and Tb11 > Td11. Then the variable temperature compartment is cooling, the freezer reaches the shutdown point first, the variable temperature compartment reaches the shutdown point later, and the refrigerator reaches the startup point last. At this time, the compressor stops, and the freezer fan starts to cool the variable temperature compartment and the refrigerator compartment.

[0120] 4) If Tc2 < Tb11 and Tb11 > Td11. Then the variable temperature compartment is cooling, the freezer compartment reaches the shutdown point first, the refrigerator compartment reaches the startup point later, and the variable temperature compartment reaches the shutdown point last. When the freezer compartment reaches the shutdown point, the compressor stops, and the freezer fan starts to cool the refrigerator compartment and the variable temperature compartment.

[0121] Scenario 5: After switching to the variable temperature compartment for cooling, detect the current duration of Tb11 and the duration of Tc2.

[0122] When Tc1 < Td1, before the refrigerator compartment reaches the shutdown point, if the freezer compartment has already reached the shutdown point, at this time, the frequency can be reduced or the air damper can be made smaller, and the freezer fan stops.

[0123] In summary, the present application provides a method for controlling the dynamic refrigeration capacity distribution of a refrigerator based on temperature prediction of multiple compartments, including: real-time calculation of the cooling rate and heating rate of each compartment; based on the temperature difference between the current temperature and the set shutdown point and the cooling rate, predicting the time it takes for the current refrigerated compartment to reach the shutdown point; based on the temperature difference between the current temperature and the set startup point and the heating rate, predicting the time it takes for the non-refrigerated compartment to reach the startup point; comparing the time it takes to reach the shutdown point with the time it takes to reach the startup point; dynamically adjusting the compressor speed based on the comparison result to redistribute the cooling capacity and balance the temperature of each compartment. The present application predicts the time it takes to reach the shutdown point and the startup point based on the cooling rate and the heating rate, and then reasonably controls the compressor speed based on the comparison of the compartment cooling and heating time, so that the refrigeration of each compartment reaches a dynamic balance, dynamically controls the compressor speed, distributes the cooling capacity, achieves a reasonable balance in the refrigeration of each compartment of the refrigerator, and improves the performance of the refrigerator.

[0124] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the disclosure of the specification and examples. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in this disclosure.

Claims

1. A refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction, characterized in that: Including steps: Real-time calculation of cooling rate and heating rate of each compartment; Based on the temperature difference between the current temperature and the set shutdown point and the cooling rate, predict the time it takes for the current refrigeration compartment to reach the shutdown point; Based on the temperature difference between the current temperature and the set start point and the heating rate, predict the time it takes for the non-refrigerated compartment to reach the start point; Comparing the time taken to reach the shutdown point with the time taken to reach the startup point; The compressor speed is dynamically adjusted based on the comparison results to redistribute the cooling capacity and balance the temperature among the compartments.

2. The refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction according to claim 1, characterized in that: Before the real-time calculation of the cooling rate and heating rate of each compartment, the method further includes the following steps: Analyze the temperature change trend of each compartment during refrigeration and identify the connection mode, which includes series connection and parallel connection; If during cooling, the compartment temperature drops synchronously, it is determined to be the series connection; If the compartment temperature rises during cooling, it is determined to be the parallel connection.

3. The refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction according to claim 1, characterized in that: The steps for calculating the cooling rate and heating rate of each compartment in real time include: The cooling rate is calculated by dividing the temperature difference between the start point and the stop point of the compartment by the corresponding cooling time; The heating rate is calculated by dividing the temperature difference between the compartment from the shutdown point to the startup point by the corresponding heating time.

4. The refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction according to claim 3, characterized in that: The step of dynamically adjusting the compressor speed according to the comparison result includes: When it is predicted that the time length of the current refrigeration compartment reaching the shutdown point is longer than the time length of any of the non-refrigeration compartments reaching the startup point, increasing the speed of the compressor; When it is predicted that the time duration for the current refrigeration compartment to reach the shutdown point is less than or equal to the time duration for all the non-refrigeration compartments to reach the startup points, the current compressor speed is maintained until the shutdown point.

5. The refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction according to claim 3, characterized in that: The compressor speed regulation follows a proportional relationship; The proportional relationship is: When the compressor speed is increased, the cooling time is shortened according to the ratio of the compressor speed increase; When the compressor speed is reduced, the cooling time is extended according to the ratio of the compressor speed reduction.

6. The refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction according to claim 1, characterized in that: Also includes the steps: After detecting that the compartment door is open, recalculate the cooling rate and heating rate of the compartment with the door open.

7. The refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction according to claim 6, characterized in that: The recalculating the cooling rate and heating rate of the switch compartment further comprises the steps of: By comparing the change in the cooling rate of the compartment with the door opened before and after the door is opened, the increase or decrease in load is determined; If the cooling rate decreases, it is determined that the load increases; If the cooling rate increases, it is determined that the load is reduced.

8. The refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction according to claim 1, characterized in that: After dynamically adjusting the compressor speed according to the comparison result, the method further includes switching the refrigeration compartment based on the time comparison result: If the non-refrigeration compartment has reached the start-up point before the current refrigeration compartment reaches the shutdown point, the refrigeration is switched to the non-refrigeration compartment; If multiple rooms reach the power-on point at the same time, the cooling order of the rooms will be assigned according to the preset priority.

9. The refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction according to claim 1, characterized in that: The step of reallocating cooling capacity comprises: After the compressor stops, the refrigeration fan is started to cool the non-refrigerated compartment using the residual cooling capacity until the non-refrigerated compartment reaches the shutdown point or the refrigeration compartment reaches the startup point.

10. The refrigerator dynamic cooling capacity distribution control method based on multi-compartment temperature prediction according to any one of claims 1 to 9, characterized in that: After a preset period, the cooling rate and heating rate of each compartment are recalculated, the time to reach the shutdown point and the time to reach the startup point are predicted, and the method is executed in a loop.

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