Refrigeration control method of single-system air-cooled refrigerator

Abstract

The invention discloses a refrigeration control method of a single-system air-cooled refrigerator, which comprises the following steps: by taking one of a refrigerating chamber and a freezing chamber as a target chamber and the other one as a reference chamber, iteratively correcting a chamber startup and shutdown temperature difference of the target chamber, firstly, refrigerating the target chamber and the reference chamber at the same time, and then refrigerating the target chamber and the reference chamber at the same time; and when the temperature of the reference chamber rises again to the starting temperature of the reference chamber, the target chamber and the reference chamber are refrigerated at the same time, and then the starting and stopping temperature difference is corrected based on the temperature difference value of the actual temperature of the target chamber and the stopping temperature of the target chamber. In the iterative correction process, if the target compartment firstly rises to the starting temperature, the corrected compartment starting and stopping temperature difference is increased, and the starting and stopping period is prolonged, and if the reference compartment firstly rises to the starting temperature, the corrected compartment starting and stopping temperature difference is decreased, and the starting and stopping period is shortened, and finally, the starting and stopping periods of the refrigerating chamber and the freezing chamber tend to be consistent. The mutual influence of the temperature between the refrigerating chamber and the freezing chamber is reduced, and the temperature stability of the chambers is improved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigeration control method for a single-system air-cooled refrigerator. Background Art

[0002] With the continuous improvement of people's living standards, refrigerators have gradually become an indispensable electrical appliance in home life.

[0003] Refrigerators typically have a refrigerator compartment and a freezer compartment. In related art, the freezer and refrigerator compartments independently control their respective cooling modes based on temperature information detected by their respective temperature sensors and their respective start and stop temperatures. When the temperature sensor detects that the compartment temperature has reached the start temperature, cooling begins for the corresponding compartment; when the temperature sensor detects that the compartment temperature has reached the stop temperature, cooling stops for the corresponding compartment. In multi-system refrigerators, where the freezer and refrigerator compartments are independently controlled by their own refrigeration systems, the two compartments have minimal mutual influence during the cooling process. However, for a single-system air-cooled refrigerator, when the refrigerator compartment needs to be cooled, cold air must be supplied to the refrigerator compartment regardless of whether the freezer compartment needs to be cooled. When the hot air in the refrigerator compartment returns to the evaporator, the return air causes the temperature of the evaporator to rise, which will inevitably cause the temperature of the freezer compartment to rise, resulting in the freezer compartment temperature being too high or the freezer compartment requiring cooling in advance, affecting the storage environment in the freezer compartment and making it impossible for the freezer compartment to form stable temperature fluctuations. At the same time, the different temperatures in the freezer compartment will also affect the temperature of the air supplied to the refrigerator compartment, causing the cooling time of the refrigerator compartment to vary, and ultimately causing the average temperature of the refrigerator compartment to be unstable.

[0004] Therefore, it is necessary to optimize the refrigeration control method of the single-system air-cooled refrigerator. Summary of the Invention

[0005] In order to reduce the mutual influence between the freezer compartment and the refrigerator compartment of a single-system air-cooled refrigerator and improve the temperature stability of the compartments, the present application provides a refrigeration control method for a single-system air-cooled refrigerator.

[0006] In some embodiments of the present application, a single-system air-cooled refrigerator includes a cabinet, a refrigeration system, a temperature detection unit, and a control device, wherein the cabinet serves as a supporting structure of the refrigerator and is provided with a plurality of refrigeration compartments therein, the plurality of refrigeration compartments including at least one refrigerator compartment and at least one freezer compartment; the refrigeration system is provided in the cabinet and is configured to provide cooling to the plurality of refrigeration compartments; the temperature detection unit is provided in the plurality of refrigeration compartments and is configured to detect the temperature of each refrigeration compartment; and the control device is configured to execute a refrigeration control method.

[0007] The refrigeration control method includes:

[0008] Take one of the refrigerator and freezer rooms as the target compartment and the other as the reference compartment, and control the refrigeration system to start refrigeration for the target compartment and the reference compartment at the same time;

[0009] Iteratively executing the target compartment compartment start-stop temperature difference correction step, comprising: when the temperature detection unit detects that the temperature of the target compartment drops to its preset shutdown temperature, controlling the refrigeration system to stop refrigerating the target compartment, and when the temperature detection unit detects that the temperature of the reference compartment drops to its preset shutdown temperature, controlling the refrigeration system to stop refrigerating the reference compartment; when and only when the temperature of the reference compartment returns to its preset start-up temperature, controlling the refrigeration system to start refrigeration for the target compartment and the reference compartment, and obtaining the temperature of the target compartment; obtaining the actual start-stop temperature difference based on the temperature difference between the target compartment temperature and its preset shutdown temperature, correcting the target compartment start-stop temperature difference based on the actual start-stop temperature difference and the preset start-stop temperature difference of the target compartment, and controlling the refrigeration system to cool the target compartment based on the corrected compartment start-stop temperature difference, wherein the preset start-stop temperature difference is the compartment start-stop temperature difference before the compartment start-stop temperature difference is corrected;

[0010] When the target compartment corrected on-off temperature difference corresponding to the on-off cycle and the reference compartment corresponding to the on-off cycle length difference is below the preset difference, stop executing the target compartment on-off temperature difference correction step, and based on the corrected compartment on-off temperature difference control refrigeration system to the target compartment cooling.

[0011] Thus, in the above technical solution, one of the refrigerator and the freezer is used as the target compartment, and the other is used as the reference compartment. The correction step of the compartment start-stop temperature difference of the target compartment is iteratively performed. First, the target compartment and the reference compartment are started for refrigeration at the same time. After that, regardless of whether the temperature of the target compartment rises to its start-up temperature, the temperature of the reference compartment is waited for to rise to its start-up temperature before the target compartment and the reference compartment are started for refrigeration at the same time. After that, the start-stop temperature difference of the target compartment is corrected based on the temperature difference between the actual temperature of the target compartment and its stop temperature when the target compartment and the reference compartment are started for refrigeration at the same time. In the process of iteratively correcting the on-off temperature difference of the target compartment, if the target compartment returns to its on-off temperature before the reference compartment, the target compartment's corrected on-off temperature difference becomes larger, and the on-off cycle becomes longer. If the reference compartment returns to its on-off temperature before the target compartment, the target compartment's corrected on-off temperature difference becomes smaller, and the on-off cycle becomes shorter. Ultimately, the difference in the length of the on-off cycle corresponding to the on-off temperature difference of the target compartment and the on-off cycle corresponding to the reference compartment is small, that is, the on-off cycles of the refrigerating chamber and the freezing chamber tend to be consistent, and the refrigerating chamber and the freezing chamber are cooled synchronously, thereby reducing the mutual influence of the temperatures between the refrigerating chamber and the freezing chamber, and improving the temperature stability of the refrigerating chamber and the freezing chamber. Moreover, the present application only needs to improve the on-off mechanism of the refrigerator, without adding any additional components, and will not increase the hardware cost of the refrigerator.

[0012] In some embodiments of the present application, the target compartment's on-off temperature difference is corrected based on the actual on-off temperature difference and the target compartment's preset on-off temperature difference, including: performing a weighted calculation on the actual on-off temperature difference and the target compartment's preset on-off temperature difference, and using the weighted result as the target compartment's corrected on-off temperature difference.

[0013] In the above technical solution, by weighted calculation of the actual start-stop temperature difference and the preset start-stop temperature difference of the target compartment, and using the weighted result as the target compartment corrected compartment start-stop temperature difference, the result of the compartment start-stop temperature difference is more reasonable.

[0014] In some embodiments of the present application, the actual start-up and shutdown temperature difference and the preset start-up and shutdown temperature difference of the target compartment are weightedly calculated, including: based on the relationship Tr1=(Tr0) / 2+(T1) / 2, the actual start-up and shutdown temperature difference and the preset start-up and shutdown temperature difference of the target compartment are weightedly calculated, wherein Tr1 is the weighted result, Tr0 is the preset start-up and shutdown temperature difference of the target compartment, and T1 is the actual start-up and shutdown temperature difference of the target compartment.

[0015] In the above technical solution, half of the actual start-stop temperature difference and half of the preset start-stop temperature difference of the target compartment are added to obtain the target compartment corrected compartment start-stop temperature difference, which further makes the result of the compartment start-stop temperature difference more reasonable and reliable.

[0016] In some embodiments of the present application, when the corrected compartment start-stop temperature difference of the target compartment reaches above the first temperature difference threshold or reaches below the second temperature difference threshold, the compartment start-stop temperature difference correction step of the target compartment is stopped.

[0017] In the above technical solution, the target compartment after the corrected compartment start-stop temperature difference reaches above the first temperature difference threshold as a trigger condition for stopping the execution of the target compartment compartment start-stop temperature difference correction step, which can avoid the target compartment after the corrected compartment start-stop temperature difference corresponding to the start-stop cycle is too long, affecting the storage environment in the target compartment; the target compartment after the corrected compartment start-stop temperature difference reaches below the second temperature difference threshold as a trigger condition for stopping the execution of the target compartment compartment start-stop temperature difference correction step, which can avoid the target compartment after the corrected compartment start-stop temperature difference corresponding to the start-stop cycle is too short, resulting in frequent start-stop cooling of the target compartment.

[0018] In some embodiments of the present application, the refrigerator compartment is used as the target compartment and the freezer compartment is used as the reference compartment; when the target compartment's corrected compartment on-off temperature difference reaches above the first temperature difference threshold or reaches below the second temperature difference threshold, the refrigeration control method further includes: taking the freezer compartment as the target compartment and the refrigerator compartment as the reference compartment; if the corrected compartment on-off temperature difference of the refrigerator compartment reaches above the first temperature difference threshold, setting the on-off temperature difference of the refrigerator compartment to the first temperature difference threshold; if the corrected compartment on-off temperature difference of the refrigerator compartment reaches below the second temperature difference threshold, setting the on-off temperature difference of the refrigerator compartment to the second temperature difference threshold; and iterating again to execute the compartment on-off temperature difference correction step of the target compartment.

[0019] In the above technical solution, it is considered that when the compartment on-off temperature difference of the refrigerating chamber is corrected and the execution of the compartment on-off temperature difference correction step of the refrigerating chamber is stopped because the compartment on-off temperature difference reaches above the first temperature difference threshold or reaches below the second temperature difference threshold, the on-off cycle corresponding to the compartment on-off temperature difference of the refrigerating chamber after correction and the on-off cycle corresponding to the freezer chamber are still relatively large. Further, the freezer chamber is used as the target compartment and the refrigerating chamber is used as the reference compartment. The compartment on-off temperature difference correction step of the freezer chamber is executed. By correcting the on-off temperature difference of the freezer chamber, the on-off cycles of the refrigerating chamber and the freezer chamber are finally approached.

[0020] In some embodiments of the present application, when the compartment start-stop temperature difference correction step of the target compartment is iteratively executed again, when the compartment start-stop temperature difference of the target compartment after correction reaches above the third temperature difference threshold or reaches below the fourth temperature difference threshold, the compartment start-stop temperature difference correction step of the target compartment is stopped.

[0021] In the above technical solution, the target compartment after the corrected compartment start-stop temperature difference reaches more than the third temperature difference threshold as the trigger condition for stopping the execution of the target compartment compartment start-stop temperature difference correction step, which can avoid the target compartment after the corrected compartment start-stop temperature difference corresponding to the start-stop cycle is too long, affecting the storage environment in the target compartment; the target compartment after the corrected compartment start-stop temperature difference reaches less than the fourth temperature difference threshold as the trigger condition for stopping the execution of the target compartment compartment start-stop temperature difference correction step, which can avoid the target compartment after the corrected compartment start-stop temperature difference corresponding to the start-stop cycle is too short, resulting in frequent start-stop cooling of the target compartment.

[0022] In some embodiments of the present application, when the compartment start-stop temperature difference correction step of the target compartment is iteratively executed again, when the temperature detection unit detects that the difference between the temperature of the target compartment and its reference start-up temperature reaches above the difference threshold, the compartment start-stop temperature difference correction step of the target compartment is stopped.

[0023] In the above technical solution, the difference between the temperature of the target compartment and its reference startup temperature reaches a difference threshold or more as a trigger condition for stopping the execution of the compartment startup and shutdown temperature difference correction step of the target compartment, which can avoid the temperature of the target compartment being too high and affecting the storage environment in the target compartment.

[0024] In some embodiments of the present application, after the corrected compartment start-stop temperature difference of the target compartment reaches above the third temperature difference threshold or reaches below the fourth temperature difference threshold, the step of correcting the compartment start-stop temperature difference of the target compartment is stopped, the refrigeration control method further includes: canceling the start-up temperature setting of the refrigeration compartment; when controlling the refrigeration system to start refrigerating the freezer compartment, if the temperature detection unit detects that the temperature of the refrigeration compartment has reached its shutdown temperature, controlling the refrigeration system to start refrigerating the refrigeration compartment.

[0025] In the above technical solution, the start-up temperature setting of the refrigerator compartment is cancelled. When the refrigeration system is controlled to start cooling the freezer compartment, if the temperature detection unit detects that the temperature of the refrigerator compartment has reached its shutdown temperature, the refrigeration system is controlled to start cooling the refrigerator compartment. This can minimize the mutual influence between the refrigerator compartment and the freezer compartment during the refrigeration process in extreme environments.

[0026] In some embodiments of the present application, the refrigeration control method further includes: obtaining the ambient temperature of the environment in which the single-system air-cooled refrigerator is located, and determining the initial startup temperature and initial shutdown temperature of the plurality of refrigeration compartments based on the ambient temperature; wherein the preset shutdown temperature of the target compartment is the shutdown temperature before the current correction of the compartment startup and shutdown temperature difference, and before the first execution of the compartment startup and shutdown temperature difference correction step of the target compartment, the corresponding initial startup temperature of the target compartment is used as its preset shutdown temperature.

[0027] In the above technical solution, the initial startup temperature and initial shutdown temperature of the refrigeration compartment are determined based on the ambient temperature, which can meet the basic temperature control requirements of the compartment.

[0028] In some embodiments of the present application, a change in the ambient temperature of the environment in which the single-system air-cooled refrigerator is located is used as an execution trigger condition.

[0029] In the above technical solution, when the ambient temperature changes, the initial start-stop temperature difference between the refrigerator and freezer changes. By re-executing the above refrigeration control method process, the start-stop temperature difference between the compartments matching various ambient temperatures can be corrected. Under various ambient temperatures, the start-stop cycles of the refrigerator and freezer can be made consistent.

[0030] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0032] Figure 1 A schematic diagram of the structure behind the hidden door of a single-system air-cooled refrigerator in one embodiment of the present application is shown.

[0033] Figure 2 Shown Figure 1 The schematic diagram of the back structure of a single-system air-cooled refrigerator is shown.

[0034] Figure 3 Shown Figure 1 The schematic diagram of the structure of the evaporator and fan of the single-system air-cooled refrigerator is shown.

[0035] Figure 4 Shown Figure 1 The block diagram of the partial structure of the single-system air-cooled refrigerator is shown.

[0036] Figure 5 A flow chart of a refrigeration control method for a single-system air-cooled refrigerator according to an embodiment of the present application is shown.

[0037] Figure 6 A detailed flow chart of the steps for correcting the temperature difference between the start and stop of a compartment in one embodiment of the present application is shown.

[0038] Figure 7 A detailed flow chart of the steps for correcting the temperature difference between the start and stop of a compartment in another embodiment of the present application is shown.

[0039] The following are the descriptions of the reference numerals:

[0040] 1. Cabinet; 11. Refrigeration compartment; 12. Shelves; 13. Drawers; 21. Compressor; 22. Condenser; 23. Evaporator; 24. Fan; 25. Refrigeration damper; 31. Refrigeration temperature sensor; 32. Freezer temperature sensor; 33. Ambient temperature sensor (clothes tub); 40. Control device. DETAILED DESCRIPTION

[0041] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0042] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0043] In the description of this application, it should be understood that the terms "left", "right", "top", "bottom", "front", "back", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0045] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0046] In the related art, single-system air-cooled refrigerators have the problem of unstable refrigeration compartment temperature. The reason is that the freezer and refrigerator compartments independently control the start and stop of their respective refrigeration based on the temperature information detected by their respective temperature sensors and their respective start and stop temperatures. When the refrigerator compartment needs to be refrigerated, cold air must be supplied to the refrigerator compartment regardless of whether the freezer compartment needs to be refrigerated. When the hot air in the refrigerator compartment returns to the evaporator, the return air causes the temperature of the evaporator to rise, causing the temperature of the freezer compartment to rise, resulting in the temperature of the freezer compartment being too high or the freezer compartment requiring refrigeration in advance, affecting the storage environment in the freezer compartment and making it impossible for the freezer compartment to form stable temperature fluctuations. At the same time, the different temperatures in the freezer compartment will also affect the temperature of the air supplied to the refrigerator compartment, causing the refrigeration time of the refrigerator compartment to vary, and ultimately causing the average temperature of the refrigerator compartment to be unstable.

[0047] In view of this, the present application uses one of the refrigerator and the freezer as the target compartment and the other as the reference compartment, and iteratively performs a correction step on the compartment start-stop temperature difference of the target compartment. First, refrigeration is started for the target compartment and the reference compartment at the same time. After that, regardless of whether the temperature of the target compartment returns to its start-up temperature, the temperature of the reference compartment is waited for to return to its start-up temperature before refrigeration is started for the target compartment and the reference compartment at the same time. After that, the start-stop temperature difference of the target compartment is corrected based on the temperature difference between the actual temperature of the target compartment and its stop temperature when refrigeration is started for the target compartment and the reference compartment at the same time. In the process of iteratively correcting the target compartment's on-off temperature difference, if the target compartment rises to its on-off temperature before the reference compartment, the target compartment's on-off temperature difference becomes larger and the on-off cycle becomes longer. If the reference compartment rises to its on-off temperature before the target compartment, the target compartment's on-off temperature difference becomes smaller and the on-off cycle becomes shorter. Ultimately, the on-off cycle corresponding to the on-off temperature difference of the target compartment is smaller than the on-off cycle length difference of the reference compartment corresponding to the on-off cycle, that is, the on-off cycles of the refrigerator and freezer tend to be consistent, and the refrigerator and freezer are cooled synchronously, thereby reducing the mutual influence of the temperature between the refrigerator and freezer, and improving the temperature stability of the refrigerator and freezer.

[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] Figure 1 A schematic diagram of the structure behind the hidden door of a single-system air-cooled refrigerator in one embodiment of the present application is shown.

[0050] like Figure 1As shown, the single-system air-cooling refrigerator of the embodiment of the present application includes a housing 1, which serves as the refrigerator's supporting structure and has an internal storage space (not shown). The storage space of housing 1 can be equipped with other components of the single-system air-cooling refrigerator, such as the refrigeration system and circuit structure. The external shape of housing 1 can be designed as needed, for example, it can be a hollow rectangular parallelepiped.

[0051] like Figure 1 As shown, the interior of the box body 1 may define a refrigeration compartment 11, and there may be multiple refrigeration compartments 11, for example, two or more. The multiple refrigeration compartments 11 include a refrigerator and a freezer. The number of refrigerators may be one or more, and the number of freezers may be one or more.

[0052] The interior of the cabinet 1 may be provided with a shelf 12. Shelf 12 may be located within the refrigeration compartment 11, for example, within a refrigerator compartment. Shelf 12 can be used to store various items such as beverages and food. Shelf 12 is connected to the cabinet interior. Specifically, the left and right opposing sides of shelf 12 are connected to the left and right opposing sides of the cabinet interior, respectively, providing stable support for shelf 12. Shelf 12 may be provided in one or more locations.

[0053] The interior of the cabinet 1 may be provided with a drawer 13. The drawer 13 may be located within the refrigeration compartment 11, for example, in a freezer or refrigerator compartment. The drawer 13 can be used to store various items such as beverages and food. The cabinet interior is formed with a drawer portion (not shown), from which the drawer 13 can be pulled out to place or remove items. For the refrigeration compartment 11, the number of drawers 13 can be one or more.

[0054] The front side of the box body 1 is provided with a food access opening (not shown in the figure), which is connected to the internal space of the refrigeration compartment 11. Food can be put into the refrigeration compartment 11 or taken out from the refrigeration compartment 11 through the food access opening.

[0055] The front side of the box body 1 is provided with a door body (not shown in the figure), which is movably provided at the food access opening for opening or closing the food access opening and further opening or closing the interior space of the refrigeration compartment 11. The number of the door bodies can be one, two or more.

[0056] In some embodiments, the door body and the box body 1 can be connected by a hinge, and the door body can rotate around the axis of the hinge to open and close the door body, thereby opening or closing the food access opening.

[0057] Figure 2 Shown Figure 1The back structure diagram of the single-system air-cooled refrigerator is shown in FIG. Figure 3 Shown Figure 1 The schematic diagram of the structure of the evaporator and fan of the single-system air-cooled refrigerator is shown in FIG. Figure 4 Shown Figure 1 The block diagram of the partial structure of the single-system air-cooled refrigerator is shown.

[0058] The single-system air-cooled refrigerator of the embodiment of the present application also includes a refrigeration system. Figures 2 to 3 As shown, the refrigeration system may include a compressor 21, a condenser 22, a throttling device (not shown in the figure) and an evaporator 23. The compressor 21, the condenser 22, the throttling device and the evaporator 23 are connected in series in sequence through pipelines, and refrigerant flows in the pipelines.

[0059] When compressor 21 is operating, low-temperature, low-pressure refrigerant is drawn into compressor 21. It is compressed within the compressor 21 cylinder into a high-temperature, high-pressure, superheated gas before being discharged into condenser 22. The high-temperature, high-pressure refrigerant gas dissipates heat through condenser 22, gradually cooling to a saturated vapor at room temperature and high pressure, and then further cooling to a saturated liquid. The refrigerant's pressure remains virtually constant throughout the condensation process. The throttling device, which can be a capillary tube, throttles and reduces the pressure of the condensed saturated refrigerant liquid through the capillary tube, transforming it into a wet vapor at room temperature and low pressure. This wet vapor then absorbs heat and vaporizes in evaporator 23, reducing the temperature of evaporator 23 and its surroundings while also transforming the refrigerant into a low-temperature, low-pressure gas. Evaporator 23 provides cooling to refrigeration compartment 11, thereby lowering the temperature of the air within. The refrigerant coming out of the evaporator 23 returns to the compressor 21 again, and the above process is repeated, so that the evaporator 23 can continue to provide cooling to the refrigeration compartment 11, thereby maintaining the refrigeration compartment 11 at a set temperature.

[0060] like Figure 2 As shown, the compressor 21 and condenser 22 can be arranged at the rear bottom of the cabinet 1. Of course, the compressor 21 and condenser 22 can also be arranged in other locations according to the industrial design of the refrigerator, and are not listed here one by one. The evaporator 23 can be arranged at the rear side of the cabinet 1 corresponding to the freezer compartment, or arranged in the freezer compartment. Of course, the evaporator 23 can also be arranged in other locations according to the industrial design of the refrigerator.

[0061] In some embodiments, as Figure 3As shown, the refrigeration system also includes a fan 24. The fan 24 can be installed in the housing 1 at a location corresponding to the evaporator 23, for example, in the freezer compartment. The fan 24 is used to provide power to evenly distribute the cooling energy generated by the evaporator 23 throughout the freezer compartment, deliver the cooling energy generated by the evaporator 23 to the refrigerator compartment, and encourage the airflow within each refrigeration compartment 11 to flow back to the evaporator 23. As the airflow passes through the evaporator 23, it exchanges heat with the evaporator 23, reducing the airflow temperature. The cooled airflow is then introduced into the refrigeration compartment 11 as cooling energy, thereby lowering the air temperature within the refrigeration compartment 11.

[0062] When the compressor 21 is started, the fan 24 can be started at the same time. When the compressor 21 is started, the refrigeration of the freezer compartment is started. When the compressor 21 is stopped, the fan 24 can be stopped at the same time. When the compressor 21 is stopped, the refrigeration of the freezer compartment is stopped.

[0063] In some embodiments, as Figure 4 As shown, the refrigeration system also includes a refrigeration damper 25, which is used to control the amount of cold air entering the refrigeration compartment. When the refrigeration damper 25 is open, the cold air generated by the evaporator 23 can be delivered to the refrigeration compartment. When the refrigeration damper 25 is closed, the cold air generated by the evaporator 23 cannot be delivered to the refrigeration compartment.

[0064] When the compressor 21 and the fan 24 are started and the refrigeration damper 25 is opened to the target angle, the refrigeration of the refrigeration compartment is started, and when the refrigeration damper 25 is closed, the refrigeration of the refrigeration compartment is stopped. It can be understood that the target angle can be any angle greater than zero.

[0065] In some embodiments, as Figure 4 As shown, the single-system air-cooled refrigerator also includes a temperature detection unit, which is arranged in the refrigeration compartment 11 and is used to detect the temperature of each refrigeration compartment 11, so that the control device 40 of the single-system air-cooled refrigerator can start and stop the compressor 21 according to the temperature of the refrigeration compartment 11, and perform the compartment start-stop temperature difference correction.

[0066] In some embodiments, the temperature detection unit includes a refrigeration temperature sensor 31 and a freezing temperature sensor 32. The refrigeration temperature sensor 31 is disposed in the refrigeration compartment to detect the refrigeration compartment temperature of the refrigeration compartment. The freezing temperature sensor 32 is disposed in the freezing compartment to detect the freezing compartment temperature of the freezing compartment.

[0067] A refrigeration chamber may be provided with one refrigeration temperature sensor 31 or multiple refrigeration temperature sensors 31. When a refrigeration chamber is provided with multiple refrigeration temperature sensors 31, the refrigeration chamber temperature of the refrigeration chamber may be obtained based on the temperature data detected by the multiple refrigeration temperature sensors 31. For example, the average value of the temperature data detected by the multiple refrigeration temperature sensors 31 may be used as the refrigeration chamber temperature of the refrigeration chamber.

[0068] A freezer compartment may be provided with one freezing temperature sensor 32 or multiple freezing temperature sensors 32. When a freezer compartment is provided with multiple freezing temperature sensors 32, the freezer compartment temperature of the freezer compartment may be obtained based on the temperature data detected by the multiple freezing temperature sensors 32. For example, the average value of the temperature data detected by the multiple freezing temperature sensors 32 may be used as the freezer compartment temperature of the freezer compartment.

[0069] In some embodiments, as Figure 1 and Figure 4 As shown, the single-system air-cooled refrigerator also includes an ambient temperature sensor 33, which is arranged on the outside of the box body 1 and is used to detect the ambient temperature of the environment in which the single-system air-cooled refrigerator is located, so that the control device of the single-system air-cooled refrigerator can control the operation of related components according to the ambient temperature.

[0070] The ambient temperature sensor 33 may be disposed on the top wall of the box body 1 or at other locations of the box body 1 .

[0071] The single-system air-cooled refrigerator of the embodiment of the present application may further include a control device 40. The control device 40 may be electrically connected to the compressor 21 and may send a control signal to the compressor 21 to control the start or stop of the compressor 21, thereby maintaining the temperature in the refrigeration compartment 11 at a target temperature by starting and stopping the compressor 21. The control device 40 may be electrically connected to the fan 24 and used to control the start and stop of the fan 24, enabling the fan 24 to start when the refrigeration compartment 11 needs to be cooled and shut down at other times. The control device 40 may be electrically connected to the refrigeration damper 25 and may control the opening and closing of the refrigeration damper 25 to control whether the cooling energy generated by the evaporator 23 is delivered to the refrigeration compartment. The control device 40 may be electrically connected to the temperature detection unit and may receive a temperature signal input by the temperature detection unit. The control device 40 may control the start and stop of the compressor 21 according to the temperature signal input by the temperature detection unit, and may correct the temperature difference between the start and stop of the compartment. The control device 40 can also be electrically connected to other structures of the single-system air-cooled refrigerator. For example, it can be electrically connected to the ambient temperature sensor 33 so that it can receive the temperature signal input by the ambient temperature sensor 33 and control corresponding components according to the temperature signal input by the ambient temperature sensor 33.

[0072] Figure 5A flow chart of a refrigeration control method for a single-system air-cooled refrigerator according to an embodiment of the present application is shown.

[0073] The control device 40 is configured to execute a refrigeration control method, such as Figure 5 As shown, the refrigeration control method includes at least steps S510 to S590, which are described in detail as follows:

[0074] In step S510, one of the refrigerator and freezer compartments is used as the target compartment, and the other is used as the reference compartment. The refrigeration system is controlled to start refrigerating both the target compartment and the reference compartment simultaneously. Then, the process proceeds to step S520.

[0075] It can be understood that when the single system air cooling refrigerator is the above Figures 1 to 4 In the refrigerator of the embodiment shown, in step S510, the compressor and the fan are started and the refrigeration damper is controlled to open to a target angle, so as to start cooling the target compartment and the reference compartment at the same time.

[0076] In step S520, it is determined whether the temperature of the target compartment has dropped to its preset shutdown temperature and whether the temperature of the reference compartment has dropped to its preset shutdown temperature. If the temperature of the target compartment has dropped to its preset shutdown temperature, the process proceeds to step S530a. If the temperature of the reference compartment has dropped to its preset shutdown temperature, the process proceeds to step S530b.

[0077] Wherein, the preset shutdown temperature of the target compartment is the shutdown temperature of the target compartment before the current execution of step S520. Exemplarily, before the first execution of step S520, the preset shutdown temperature of the target compartment is the initial shutdown temperature, which may be determined based on the ambient temperature; and after the target compartment start-stop temperature difference correction step is executed, the preset shutdown temperature of the target compartment is the shutdown temperature obtained after the last execution of the target compartment start-stop temperature difference correction step.

[0078] After executing the target compartment compartment start-stop temperature difference correction step, based on the compartment start-stop temperature difference obtained by the last execution of the target compartment compartment start-stop temperature difference correction step and the preset start-stop temperature difference of the target compartment, the preset stop temperature of the target compartment is determined. Specifically, the difference between the target compartment corrected start-stop temperature difference and the preset start-stop temperature difference of the target compartment is calculated to obtain a corrected difference; based on the corrected difference, the preset stop temperature of the target compartment is adjusted. Based on the difference between the target compartment corrected start-stop temperature difference and the preset start-stop temperature difference of the target compartment, the preset stop temperature of the target compartment is adjusted, and the stop temperature of the target compartment is iteratively adjusted, so as to further achieve a smaller difference in the length of the start-stop cycle corresponding to the start-stop temperature difference of the target compartment and the start-stop cycle corresponding to the reference compartment through subsequent steps.

[0079] For example, when the correction difference is 2x°C, the shutdown temperature of the target compartment is increased by x°C; at the same time, the startup temperature of the target compartment is reduced by x°C to obtain the preset startup temperature of the target compartment. For example, when the correction difference is -x°C, the shutdown temperature of the target compartment is reduced by 0.5x°C; at the same time, the startup temperature of the target compartment is increased by 0.5x°C to obtain the preset startup temperature of the target compartment. Among them, the preset shutdown temperature of the reference compartment is the shutdown temperature of the reference compartment before step S520 is performed this time. Specifically, it can be the initial shutdown temperature of the reference compartment, which can be determined based on the ambient temperature.

[0080] In step S530a, the refrigeration system is controlled to stop refrigerating the target compartment, and then the process proceeds to step S540.

[0081] It is understood that when the refrigerator compartment is used as the target compartment, if the freezer compartment still needs to be cooled, in step S530a, the refrigeration damper is controlled to close to stop refrigeration of the target compartment. If the freezer compartment does not need to be cooled at this time, in step S530a, the compressor and the fan are controlled to stop, and the refrigeration damper is controlled to close. When the freezer compartment is used as the target compartment, if the refrigerator compartment still needs to be cooled, for an embodiment with a freezer damper for regulating the amount of cold entering the freezer compartment, in step S530a, the freezer damper is controlled to close to stop refrigeration of the target compartment. For an embodiment without a freezer damper, in step S530a, the refrigeration damper is controlled to open to the maximum to minimize the amount of cold delivered to the target compartment. If the refrigerator compartment does not need to be cooled at this time, in step S530a, the compressor and the fan are controlled to stop, to stop refrigeration of the target compartment.

[0082] In step S530b, the refrigeration system is controlled to stop refrigerating the reference compartment, and then the process proceeds to step S540.

[0083] It can be understood that when the refrigerator compartment is used as the reference compartment, if the freezer compartment needs to be refrigerated at this time, in step S530a, the refrigeration damper is controlled to be closed to stop refrigeration of the reference compartment. If the freezer compartment does not need to be refrigerated at this time, in step S530a, the compressor and the fan can be controlled to stop, and the refrigeration damper is controlled to be closed. When the freezer compartment is used as the reference compartment, if the refrigerator compartment needs to be refrigerated at this time, for an embodiment with a refrigeration damper for regulating the amount of cold entering the freezer compartment, in step S530b, the refrigeration damper can be controlled to be closed to stop refrigeration of the reference compartment. For an embodiment without a refrigeration damper, in step S530b, the refrigeration damper can be controlled to be opened to the maximum to minimize the amount of cold delivered to the reference compartment. If the refrigerator compartment does not need to be refrigerated at this time, in step S530b, the compressor and the fan can be controlled to stop, to stop refrigeration of the reference compartment.

[0084] In step S540 , it is determined whether the temperature of the reference chamber has returned to its preset startup temperature. If so, the process proceeds to step S550 .

[0085] The preset startup temperature of the reference compartment is the startup temperature of the reference compartment before executing step S540. Specifically, it can be the initial startup temperature of the reference compartment, which can be determined based on the ambient temperature.

[0086] In step S550, the refrigeration system is controlled to start cooling the target compartment and the reference compartment, and the temperature of the target compartment is obtained. Then, the process proceeds to step S560.

[0087] It can be understood that in step S550, the temperature of the target compartment is obtained, that is, the actual temperature of the target compartment when cooling of the target compartment and the reference compartment is started is obtained.

[0088] In step S560, the actual start-stop temperature difference is obtained based on the temperature difference between the target compartment and its preset shutdown temperature, and the start-stop temperature difference of the target compartment is corrected based on the actual start-stop temperature difference and the preset start-stop temperature difference of the target compartment. Then, step S570 is entered.

[0089] Among them, the preset start-stop temperature difference is the compartment start-stop temperature difference before the current correction of the compartment start-stop temperature difference. Exemplarily, before the first execution of the compartment start-stop temperature difference correction step of the target compartment, the preset start-stop temperature difference of the target compartment is the initial start-stop temperature difference, and the initial start-stop temperature difference can be determined based on the ambient temperature; and after the target compartment start-stop temperature difference correction step is executed, the preset shutdown temperature of the target compartment is the start-stop temperature difference obtained after the last execution of the compartment start-stop temperature difference correction step of the target compartment.

[0090] In some embodiments, in step S560, the actual start-up and shutdown temperature difference and the preset start-up and shutdown temperature difference of the target compartment are weighted and the weighted result is used as the corrected compartment start-up and shutdown temperature difference of the target compartment.

[0091] By weighting the actual start-stop temperature difference and the preset start-stop temperature difference of the target compartment, and taking the weighted result as the target compartment corrected compartment start-stop temperature difference, the result of the compartment start-stop temperature difference is more reasonable.

[0092] In some embodiments, in step S560, a weighted calculation is performed on the actual start-stop temperature difference and the preset start-stop temperature difference of the target compartment based on the relationship Tr1=(Tr0) / 2+(T1) / 2, wherein Tr1 is the weighted result, i.e., the target compartment corrected start-stop temperature difference, Tr0 is the target compartment preset start-stop temperature difference, and T1 is the target compartment actual start-stop temperature difference.

[0093] The half of the actual start-stop temperature difference and the half of the preset start-stop temperature difference of the target compartment are added together to obtain the target compartment corrected compartment start-stop temperature difference, which further makes the result of the compartment start-stop temperature difference more reasonable and reliable.

[0094] Of course, in other embodiments, the actual start-up and shutdown temperature difference and the preset start-up and shutdown temperature difference of the target compartment may be calculated in other ways to correct the start-up and shutdown temperature difference of the target compartment.

[0095] In step S570, the refrigeration system is controlled to cool the target compartment based on the corrected compartment start-up and shutdown temperature difference. Then, the process proceeds to step S580.

[0096] In step S580, it is determined whether the difference in period length between the start-stop cycle corresponding to the target compartment corrected start-stop temperature difference and the start-stop cycle corresponding to the reference compartment is below a preset difference. If so, step S590 is entered; otherwise, the process returns to step S520.

[0097] That is, when the target compartment corrected compartment open and shut-down temperature difference corresponding to the open and shut-down cycle and the reference compartment corresponding to the open and shut-down cycle length difference is above the preset difference, it is considered necessary to continue to correct the target compartment open and shut-down temperature difference, return to step S520, iteratively execute the target compartment compartment open and shut-down temperature difference correction step, so that the target compartment corrected compartment open and shut-down temperature difference corresponding to the open and shut-down cycle and the reference compartment corresponding to the open and shut-down cycle length difference reaches a preset time difference or less.

[0098] Among them, the start-stop cycle is the sum of the cooling time (cooling time) and the warming time (non-cooling time) of the compartment.

[0099] It can be understood that before determining whether the target compartment corrected compartment start-stop temperature difference corresponding to the start-stop cycle and the reference compartment corresponding to the start-stop cycle length difference is below the preset difference, it is necessary to first obtain the target compartment corrected compartment start-stop temperature difference corresponding to the start-stop cycle and the reference compartment corresponding to the start-stop cycle. Specifically, in step S570, when the refrigeration system is controlled to refrigerate the target compartment based on the corrected compartment start-stop temperature difference, the cooling time and the return time of the target compartment are calculated by the timer integrated by the control device, and the cooling time and the return time of the target compartment are summed to obtain the target compartment corrected compartment start-stop temperature difference corresponding to the start-stop cycle; the cooling time and the return time of the reference compartment are calculated by the timer integrated by the control device, and the cooling time and the return time of the reference compartment are summed to obtain the start-stop cycle corresponding to the reference compartment.

[0100] The preset difference may be a smaller value set based on experience, such as 1 minute, 30 seconds, etc.

[0101] In step S590, the refrigeration system is controlled to cool the target compartment based on the corrected compartment start-up and shutdown temperature difference.

[0102] exist Figure 5 In the embodiment shown, during the iterative correction of the target compartment's on-off temperature difference, if the target compartment rises back to its on-off temperature before the reference compartment, the target compartment's corrected on-off temperature difference becomes larger, and the on-off cycle becomes longer. If the reference compartment rises back to its on-off temperature before the target compartment, the target compartment's corrected on-off temperature difference becomes smaller, and the on-off cycle becomes shorter. Ultimately, the difference in the length of the on-off cycle corresponding to the target compartment's on-off temperature difference and the on-off cycle corresponding to the reference compartment is smaller, that is, the on-off cycles of the refrigerating chamber and the freezing chamber tend to be consistent, and the refrigerating chamber and the freezing chamber are cooled synchronously, thereby reducing the mutual influence of the temperatures between the refrigerating chamber and the freezing chamber, thereby improving the temperature stability of the refrigerating chamber and the freezing chamber. Moreover, the present application only needs to improve the refrigerator's on-off mechanism, without adding any additional components, and will not increase the hardware cost of the refrigerator.

[0103] Figure 6 A detailed flow chart of the steps for correcting the temperature difference between the start and stop of a compartment in one embodiment of the present application is shown.

[0104] exist Figure 6 In the embodiment shown, the refrigerator compartment is used as the target compartment and the freezer compartment is used as the reference compartment. The compartment start-up and shutdown temperature difference correction steps include steps S610 to S670, which are described in detail as follows:

[0105] In step S610, determine whether the temperature of the refrigerator compartment has dropped to its preset shutdown temperature, and whether the temperature of the freezer compartment has dropped to its preset shutdown temperature. If the temperature of the refrigerator compartment has dropped to its preset shutdown temperature, enter step S620a; if the temperature of the freezer compartment has dropped to its preset shutdown temperature, enter step S620b.

[0106] In step S620a, the refrigeration system is controlled to stop refrigerating the refrigerating chamber. Then, the process proceeds to step S630.

[0107] In step S620b, the refrigeration system is controlled to stop refrigerating the freezing chamber, and then the process proceeds to step S630.

[0108] In step S630, it is determined whether the temperature of the freezing chamber has returned to its preset start-up temperature. If so, the process proceeds to step S640.

[0109] In step S640, the refrigeration system is controlled to start refrigeration of the refrigerating chamber and the freezing chamber, and the temperature of the refrigerating chamber is obtained. Then, the process proceeds to step S650.

[0110] In step S650, an actual on-off temperature difference is obtained based on the temperature difference between the temperature in the refrigerating chamber and its preset shutdown temperature, and the on-off temperature difference of the refrigerating chamber is corrected based on this actual on-off temperature difference and the preset on-off temperature difference of the refrigerating chamber. Then, step S660 is entered.

[0111] In step S660, the refrigeration system is controlled to refrigerate the refrigerating chamber based on the corrected compartment on-off temperature difference. Then, step S670 is entered.

[0112] In step S670, it is judged whether the difference in cycle lengths between the on-off cycle corresponding to the corrected compartment on-off temperature difference of the refrigerating chamber and the on-off cycle corresponding to the freezing chamber is below a preset difference. If so, the iterative correction is ended; otherwise, return to step S610.

[0113] Due to the refrigeration characteristics of a single-system air-cooled refrigerator, the temperature in the refrigerating chamber will necessarily reach the shutdown temperature prior to the temperature in the freezing chamber. The refrigerating chamber stops refrigerating and the temperature begins to rise. After some time, the temperature in the freezing chamber reaches the shutdown temperature, the freezing chamber stops refrigerating, and the temperature begins to rise. During this process, regardless of whether the temperature in the refrigerating chamber rises above its startup temperature, when the temperature in the freezing chamber returns to the startup temperature, refrigeration is simultaneously started for both the refrigerating chamber and the freezing chamber, and the temperature difference between the temperature in the refrigerating chamber and its shutdown temperature when refrigeration is started for the refrigerating chamber and the freezing chamber is recorded (denoted as T1). Then, based on this temperature difference and the preset on-off temperature difference of the refrigerating chamber (denoted as T0), the on-off temperature difference of the refrigerating chamber is corrected to obtain the corrected compartment on-off temperature difference Tr1. If T1 > Tr0, it means that the temperature in the refrigerating chamber has risen above its startup temperature, the refrigerating chamber has risen to the startup temperature prior to the freezing chamber, the corrected on-off temperature difference of the refrigerating chamber increases, and the cooling time and temperature rise time of the refrigerating chamber increase; if T1 < Tr0, it means that the temperature in the refrigerating chamber has not risen above its startup temperature, the freezing chamber has risen to the startup temperature prior to the refrigerating chamber, the corrected on-off temperature difference of the refrigerating chamber decreases, and the cooling time and temperature rise time of the refrigerating chamber are shortened. Through the correction of the on-off temperature difference of the refrigerating chamber, ultimately the on-off cycles of the refrigerating chamber and the freezing chamber approach each other.

[0114] It can be understood that when returning to step S610, with the corrected compartment on-off temperature difference Tr1, repeat Figure 6 the process shown, and record the temperature difference T2 between the temperature in the refrigerating chamber and its shutdown temperature when the freezing chamber stops refrigerating next time, calculate Tr2, and so on, iteratively calculating Tr3, Tr4 repeatedly until the on-off cycles of the refrigerating chamber and the freezing chamber meet the requirements. Among them, the on-off cycles of the refrigerating chamber and the freezing chamber meeting the requirements can be that the on-off cycles of the refrigerating chamber and the freezing chamber are the same, or there is only a small gap between the on-off cycles of the refrigerating chamber and the freezing chamber.

[0115] In some special environments, such as when the ambient temperature is too high or too low, it may happen that the difference in the length of the on-off cycle corresponding to the corrected compartment on-off temperature difference of the refrigerator compartment and the on-off cycle corresponding to the freezer compartment has not yet reached a preset difference, resulting in the corrected compartment on-off temperature difference of the refrigerator compartment being too large or too small. Therefore, it is necessary to further set a trigger condition for stopping the execution of the on-off temperature difference correction step of the refrigerator compartment.

[0116] In some embodiments, in addition to setting the difference in period length between the on-off cycle corresponding to the corrected compartment on-off temperature difference of the refrigerating chamber and the on-off cycle corresponding to the freezer compartment to be less than a preset difference as a trigger condition for stopping the step of correcting the on-off temperature difference of the refrigerating chamber, the trigger condition for stopping the step of correcting the on-off temperature difference of the refrigerating chamber is also set to set the corrected compartment on-off temperature difference of the refrigerating chamber to be above a first temperature difference threshold.

[0117] The trigger condition for stopping the step of correcting the compartment on-and-off temperature difference of the refrigerating chamber when the corrected compartment on-and-off temperature difference reaches above the first temperature difference threshold can avoid the on-and-off cycle corresponding to the corrected compartment on-and-off temperature difference of the refrigerating chamber being too long, thereby affecting the storage environment in the refrigerating chamber.

[0118] Among them, the first temperature difference threshold can be a value set based on experience, for example, 4°C, that is, when the corrected compartment start-stop temperature difference of the refrigerating chamber is greater than or equal to 4°C, the compartment start-stop temperature difference correction step of the refrigerating chamber is stopped.

[0119] In some embodiments, in addition to setting the difference in period length between the on-off cycle corresponding to the corrected compartment on-off temperature difference of the refrigerating compartment and the on-off cycle corresponding to the freezer compartment to be less than a preset difference as a trigger condition for stopping the step of correcting the on-off temperature difference of the refrigerating compartment, the trigger condition for stopping the step of correcting the on-off temperature difference of the refrigerating compartment is also set to set the corrected compartment on-off temperature difference of the refrigerating compartment reaching less than a second temperature difference threshold.

[0120] The corrected compartment on-off temperature difference of the refrigerating chamber reaching below the second temperature difference threshold is used as a trigger condition for stopping the execution of the compartment on-off temperature difference correction step of the refrigerating chamber, so as to avoid the on-off cycle corresponding to the corrected compartment on-off temperature difference of the refrigerating chamber being too short, resulting in frequent starting and stopping of the refrigerating chamber.

[0121] Among them, the second temperature difference threshold can be a value set based on experience, for example, 1°C, that is, when the corrected compartment start-stop temperature difference of the refrigerating chamber is less than or equal to 1°C, the compartment start-stop temperature difference correction step of the refrigerating chamber is stopped.

[0122] In the above embodiment, when the corrected compartment on-off temperature difference of the refrigerating chamber reaches above the first temperature difference threshold or reaches below the second temperature difference threshold, the on-off temperature difference correction step of the refrigerating chamber is stopped. This results in a large difference in the length of the on-off cycle corresponding to the corrected compartment on-off temperature difference of the refrigerating chamber and the on-off cycle corresponding to the freezer compartment. The mutual influence between the refrigerating chamber and the freezer compartment during the refrigeration process does not meet the requirements. Therefore, in some embodiments, the freezer compartment is used as the target compartment and the refrigerating chamber is used as the reference compartment to further perform the on-off temperature difference correction step of the freezer compartment.

[0123] Figure 7 A detailed flow chart of the steps for correcting the temperature difference between the start and stop of a compartment in another embodiment of the present application is shown.

[0124] exist Figure 7 In the embodiment shown, the freezer compartment is used as the target compartment and the refrigerator compartment is used as the reference compartment. The compartment start-up and shutdown temperature difference correction steps include steps S710 to S780, which are described in detail as follows:

[0125] In step S710, the on-off temperature difference of the refrigerating chamber is set based on the correction result of the on-off temperature difference between the compartments of the refrigerating chamber.

[0126] Among them, if the corrected compartment on-off temperature difference of the refrigerating chamber reaches above the first temperature difference threshold, the on-off temperature difference of the refrigerating chamber is set to the first temperature difference threshold; if the corrected compartment on-off temperature difference of the refrigerating chamber reaches below the second temperature difference threshold, the on-off temperature difference of the refrigerating chamber is set to the second temperature difference threshold.

[0127] In step S720, determine whether the temperature of the refrigerator compartment has dropped to its preset shutdown temperature, and whether the temperature of the freezer compartment has dropped to its preset shutdown temperature. If the temperature of the refrigerator compartment has dropped to its preset shutdown temperature, enter step S730a; if the temperature of the freezer compartment has dropped to its preset shutdown temperature, enter step S730b.

[0128] In step S730a, the refrigeration system is controlled to stop refrigerating the refrigerating chamber. Then, the process proceeds to step S740.

[0129] In step S730b, the refrigeration system is controlled to stop refrigerating the freezing chamber, and then the process proceeds to step S740.

[0130] In step S740, it is determined whether the temperature of the refrigerating chamber has returned to its preset startup temperature. If so, the process proceeds to step S750.

[0131] In step S750, the refrigeration system is controlled to start refrigeration of the refrigerator and freezer compartments, and the temperature of the freezer compartment is obtained. Then, the process proceeds to step S760.

[0132] In step S760, the actual on-off temperature difference is obtained based on the temperature difference between the freezing compartment and its preset off temperature, and the on-off temperature difference of the freezing compartment is corrected based on the actual on-off temperature difference and the preset on-off temperature difference of the freezing compartment.

[0133] In step S770, the refrigeration system is controlled to refrigerate the freezer compartment based on the corrected compartment start-up and shutdown temperature difference. Then, the process proceeds to step S780.

[0134] In step S780, it is determined whether the difference in period length between the on-off cycle corresponding to the corrected on-off temperature difference between the freezer compartment and the on-off cycle corresponding to the refrigeration compartment is less than a preset difference. If so, the iterative correction is terminated; otherwise, the process returns to step S720.

[0135] After the refrigerator and freezer compartments stop refrigerating, regardless of whether the freezer compartment temperature rises above its start-up temperature, the refrigerator and freezer compartments must be started again when the refrigerator compartment temperature returns to the start-up temperature. The temperature difference between the freezer compartment temperature and its shutdown temperature when the refrigerator and freezer compartments are started is recorded (recorded as t1). Then, based on this temperature difference and the preset start-stop temperature difference of the freezer compartment (recorded as Tf0), the start-stop temperature difference of the freezer compartment is corrected to obtain the corrected compartment start-stop temperature difference Tf1. By correcting the freezer compartment start-stop temperature difference, the start-stop cycles of the refrigerator and freezer compartments are eventually brought closer.

[0136] It can be understood that when returning to step S720, the start and stop temperature difference Tf1 between the two compartments is corrected and the process is repeated. Figure 7 The process shown is as follows, and the temperature difference Tf2 between the temperature of the freezer and its shutdown temperature is recorded when the refrigerator stops refrigerating next time, and Tf2 is calculated. Similarly, Tf3 and Tf4 are calculated iteratively until the start-stop cycle of the freezer and the start-stop cycle of the refrigerator meet the requirements.

[0137] In some special environments, such as when the ambient temperature is too high or too low, it may happen that the difference in the length of the on-off cycle corresponding to the corrected compartment on-off temperature difference of the freezer compartment and the on-off cycle corresponding to the refrigeration compartment has not yet reached a preset difference, resulting in the corrected compartment on-off temperature difference of the freezer compartment being too large or too small. Therefore, it is necessary to further set a trigger condition for stopping the execution of the on-off temperature difference correction step of the freezer compartment.

[0138] In some embodiments, in addition to setting the difference in period length between the on-off cycle corresponding to the corrected compartment on-off temperature difference of the freezer compartment and the on-off cycle corresponding to the refrigeration compartment to be less than a preset difference as a trigger condition for stopping the freezer compartment on-off temperature difference correction step, the freezer compartment on-off temperature difference corrected to reach a third temperature difference threshold value or above is also set as a trigger condition for stopping the freezer compartment on-off temperature difference correction step.

[0139] The corrected compartment on-off temperature difference of the freezer compartment reaching above the third temperature difference threshold is used as a trigger condition for stopping the execution of the compartment on-off temperature difference correction step of the freezer compartment, which can avoid the on-off cycle corresponding to the corrected compartment on-off temperature difference of the freezer compartment being too long, affecting the storage environment in the freezer compartment.

[0140] Among them, the third temperature difference threshold can be a value set based on experience, for example, 4°C, that is, when the corrected compartment start-stop temperature difference of the freezer compartment is greater than or equal to 4°C, the freezer compartment start-stop temperature difference correction step is stopped.

[0141] In some embodiments, in addition to setting the difference in period length between the on-off cycle corresponding to the corrected compartment on-off temperature difference of the freezer compartment and the on-off cycle corresponding to the refrigeration compartment to be less than a preset difference as a trigger condition for stopping the freezer compartment on-off temperature difference correction step, the freezer compartment on-off temperature difference after correction reaches below a fourth temperature difference threshold as a trigger condition for stopping the freezer compartment on-off temperature difference correction step.

[0142] The corrected compartment on-off temperature difference of the freezer compartment reaching below the fourth temperature difference threshold is used as a trigger condition for stopping the execution of the compartment on-off temperature difference correction step of the freezer compartment, so as to avoid the on-off cycle corresponding to the corrected compartment on-off temperature difference of the freezer compartment being too short, resulting in frequent starting and stopping of the freezer compartment refrigeration.

[0143] Among them, the fourth temperature difference threshold can be a value set based on experience, for example, 1°C, that is, when the corrected compartment start-stop temperature difference of the freezer compartment is less than or equal to 1°C, the freezer compartment start-stop temperature difference correction step is stopped.

[0144] In some embodiments, in addition to setting the difference in period length between the on-off cycle corresponding to the corrected compartment on-off temperature difference of the freezer compartment and the on-off cycle corresponding to the refrigeration compartment to be below a preset difference value as a trigger condition for stopping the freezer compartment on-off temperature difference correction step, the temperature detection unit also detects that the difference between the freezer compartment temperature and its reference start-up temperature reaches above a difference threshold as a trigger condition for stopping the freezer compartment on-off temperature difference correction step.

[0145] The reference startup temperature of the freezer compartment may be a startup temperature that can meet the basic temperature control requirements of the compartment, and the reference startup temperature may be determined based on the ambient temperature.

[0146] The difference between the temperature of the freezer compartment detected by the temperature detection unit and its reference start-up temperature reaching a difference threshold is used as a trigger condition for stopping the execution of the freezer compartment start-up and shutdown temperature difference correction step, which can prevent the freezer compartment temperature from being too high and affecting the storage environment in the freezer compartment.

[0147] Among them, the difference threshold can be a value set based on experience, for example, 3°C, that is, when the temperature detection unit detects that the difference between the temperature of the freezer compartment and its reference start-up temperature reaches 3°C, the freezer compartment start-up and shutdown temperature difference correction step is stopped.

[0148] In the above embodiment, when the corrected compartment on-off temperature difference of the freezer compartment reaches above the third temperature difference threshold or reaches below the fourth temperature difference threshold, or the difference between the temperature of the freezer compartment and its reference on-off temperature reaches above the difference threshold, the on-off temperature difference correction step of the freezer compartment is stopped. This results in the difference in cycle length between the on-off cycle corresponding to the corrected compartment on-off temperature difference of the freezer compartment and the on-off cycle corresponding to the refrigerating compartment being not below the preset difference, and the mutual influence between the refrigerating compartment and the freezer compartment during the refrigeration process is not small enough. In order to minimize the mutual influence between the refrigerating compartment and the freezer compartment during the refrigeration process under extreme environments, a further control strategy is provided in some embodiments.

[0149] Specifically, when the corrected compartment start-up and shutdown temperature difference of the freezer compartment reaches above the third temperature difference threshold or below the fourth temperature difference threshold, or when the difference between the temperature of the freezer compartment and its reference start-up temperature reaches above the difference threshold, the start-up temperature setting of the refrigerator compartment is canceled; when the refrigeration system is controlled to start cooling the freezer compartment, if the temperature detection unit detects that the temperature of the refrigerator compartment has reached its shutdown temperature, the refrigeration system is controlled to start cooling the refrigerator compartment until the temperature of the refrigerator compartment is lower than its shutdown temperature.

[0150] In some embodiments, a change in the ambient temperature of the single-system air-cooled refrigerator's environment serves as a trigger for executing the refrigeration control method. When the ambient temperature of the single-system air-cooled refrigerator changes, the aforementioned refrigeration control method flow is re-executed. When the ambient temperature changes, the initial start-up and shutdown temperature differences between the refrigerator and freezer compartments change. Re-execution of the aforementioned refrigeration control method flow allows for correction of the start-up and shutdown temperature differences between compartments matching various ambient temperatures, ensuring consistent start-up and shutdown cycles for the refrigerator and freezer compartments across a wide range of ambient temperatures.

[0151] The above are merely specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application are intended to be covered by the scope of protection of this application. Therefore, the scope of this application is limited only by the appended claims.

Claims

1. A refrigeration control method for a single-system air-cooled refrigerator, characterized in that: The single-system air-cooling refrigerator comprises: The box body serves as the supporting structure of the refrigerator and is provided with a plurality of refrigeration compartments therein, wherein the plurality of refrigeration compartments include at least a refrigeration compartment and at least a freezer compartment; a refrigeration system, disposed in the box and configured to provide cooling to the plurality of refrigeration compartments; a temperature detection unit, provided in the refrigeration compartment, for detecting the temperature of each of the refrigeration compartments; A control device is configured to execute a refrigeration control method, the refrigeration control method comprising: Taking one of the refrigerator compartment and the freezer compartment as a target compartment and the other as a reference compartment, controlling the refrigeration system to start refrigeration for the target compartment and the reference compartment simultaneously; Iteratively executing the target compartment open-shutdown temperature difference correction step, comprising: when the temperature detection unit detects that the temperature of the target compartment drops to its preset shutdown temperature, controlling the refrigeration system to stop refrigerating the target compartment, and when the temperature detection unit detects that the temperature of the reference compartment drops to its preset shutdown temperature, controlling the refrigeration system to stop refrigerating the reference compartment; when and only when the temperature of the reference compartment rises back to its preset start-up temperature, controlling the refrigeration system to start refrigeration for the target compartment and the reference compartment, and obtaining the temperature of the target compartment; obtaining an actual open-shutdown temperature difference based on the temperature difference between the target compartment temperature and its preset shutdown temperature, correcting the open-shutdown temperature difference of the target compartment based on the actual open-shutdown temperature difference and the preset open-shutdown temperature difference of the target compartment, and controlling the refrigeration system to cool the target compartment based on the corrected compartment open-shutdown temperature difference, wherein the preset open-shutdown temperature difference is the compartment open-shutdown temperature difference before the current correction of the compartment open-shutdown temperature difference; When the target compartment corrected start-stop temperature difference corresponding to the start-stop cycle and the start-stop cycle corresponding to the reference compartment length difference is below the preset difference, the target compartment start-stop temperature difference correction step is stopped, and the refrigeration system is controlled to cool the target compartment based on the corrected compartment start-stop temperature difference.

2. The refrigeration control method according to claim 1, characterized in that: The correcting the on-off temperature difference of the target compartment based on the actual on-off temperature difference and the preset on-off temperature difference of the target compartment includes: The actual start-stop temperature difference and the preset start-stop temperature difference of the target compartment are weighted and calculated, and the weighted result is used as the corrected compartment start-stop temperature difference of the target compartment.

3. The refrigeration control method according to claim 2, wherein: The weighted calculation of the actual start-up and shutdown temperature difference and the preset start-up and shutdown temperature difference of the target compartment includes: The actual start-stop temperature difference and the preset start-stop temperature difference of the target compartment are weightedly calculated based on the relationship Tr1=(Tr0) / 2+(T1) / 2, wherein Tr1 is the weighted result, Tr0 is the preset start-stop temperature difference of the target compartment, and T1 is the actual start-stop temperature difference of the target compartment.

4. The refrigeration control method according to any one of claims 1 to 3, characterized in that: When the corrected compartment start-stop temperature difference of the target compartment reaches above the first temperature difference threshold or reaches below the second temperature difference threshold, the compartment start-stop temperature difference correction step of the target compartment is stopped.

5. The refrigeration control method according to any one of claims 1 to 3, characterized in that: The refrigerator compartment serves as the target compartment, and the freezer compartment serves as the reference compartment; When the target compartment corrected start-up and shutdown temperature difference reaches above the first temperature difference threshold or reaches below the second temperature difference threshold, the refrigeration control method further includes: The freezer compartment is used as the target compartment, and the refrigerator compartment is used as the reference compartment; If the corrected compartment on-off temperature difference of the refrigerating chamber reaches or exceeds the first temperature difference threshold, the on-off temperature difference of the refrigerating chamber is set to the first temperature difference threshold; if the corrected compartment on-off temperature difference of the refrigerating chamber reaches or falls below the second temperature difference threshold, the on-off temperature difference of the refrigerating chamber is set to the second temperature difference threshold; The step of correcting the temperature difference between the start and stop of the target compartment is iterated again.

6. The refrigeration control method according to claim 5, characterized in that: When the step of correcting the compartment start-stop temperature difference of the target compartment is iterated again, when the corrected compartment start-stop temperature difference of the target compartment reaches above the third temperature difference threshold or reaches below the fourth temperature difference threshold, the step of correcting the compartment start-stop temperature difference of the target compartment is stopped.

7. The refrigeration control method according to claim 6, characterized in that: When the step of correcting the compartment start-stop temperature difference of the target compartment is iterated again, when the temperature detection unit detects that the difference between the temperature of the target compartment and its reference start-up temperature reaches above the difference threshold, the step of correcting the compartment start-stop temperature difference of the target compartment is stopped.

8. The refrigeration control method according to claim 6, wherein: When the corrected compartment start-stop temperature difference of the target compartment reaches above the third temperature difference threshold or reaches below the fourth temperature difference threshold, after stopping the step of correcting the compartment start-stop temperature difference of the target compartment, the refrigeration control method further includes: canceling the startup temperature setting of the refrigerator compartment; When the refrigeration system is controlled to start cooling the freezing chamber, if the temperature detection unit detects that the temperature of the refrigerating chamber reaches its shutdown temperature, the refrigeration system is controlled to start cooling the refrigerating chamber.

9. The refrigeration control method according to claim 1, wherein: Also includes: Acquiring an ambient temperature of an environment in which the single-system air-cooled refrigerator is located, and determining initial startup temperatures and initial shutdown temperatures of the plurality of refrigeration compartments based on the ambient temperature; Among them, the preset shutdown temperature of the target compartment is the shutdown temperature before the correction of the compartment start-stop temperature difference. Before the first execution of the compartment start-stop temperature difference correction step of the target compartment, the corresponding initial startup temperature of the target compartment is used as its preset shutdown temperature.

10. The refrigeration control method according to claim 1, wherein: A change in the ambient temperature of the environment in which the single-system air-cooled refrigerator is located is used as an execution trigger condition.

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