Refrigerator, control method and device thereof and computer readable storage medium

Abstract

The invention provides a refrigerator, a control method and device of the refrigerator and a computer readable storage medium. The control method comprises the steps that the refrigeration temperature is obtained; judging whether the load is changed; if the load changes, acquiring a temperature rise characteristic value of the refrigeration temperature when the refrigeration temperature reaches a starting point temperature; if the temperature rise characteristic value triggers a preset temperature rise condition, a compressor is controlled to be started; and / or; if the load changes, when the refrigeration temperature reaches the stop point temperature, the temperature drop characteristic value of the refrigeration temperature is obtained; and if the temperature drop characteristic value triggers a preset temperature drop condition, the compressor is controlled to be shut down.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, specifically to a refrigerator and its control method, device and computer-readable storage medium. Background Technology

[0002] During use, refrigerators are subject to load changes caused by various factors. These load changes lead to fluctuations in the cooling temperature of the refrigeration system. In existing technology, when the fluctuating cooling temperature reaches the start-up or stop-down temperature, the compressor will start or stop frequently, resulting in a shortened lifespan of the refrigeration system. Summary of the Invention

[0003] This application provides a refrigerator and its control method, apparatus and computer-readable storage medium, aiming to solve the technical problem of frequent compressor start-stop in refrigerators caused by load changes in the prior art.

[0004] Firstly, this application also proposes a method for controlling a refrigerator, comprising:

[0005] Obtain the cooling temperature;

[0006] Determine if the load has changed;

[0007] If the load changes, when the cooling temperature reaches the start-up temperature, the temperature rise characteristic value of the cooling temperature is obtained; if the temperature rise characteristic value triggers a preset temperature rise condition, the compressor is controlled to start; and / or;

[0008] If the load changes, when the cooling temperature reaches the shutdown point temperature, the temperature drop characteristic value of the cooling temperature is obtained; if the temperature drop characteristic value triggers a preset temperature drop condition, the compressor is controlled to shut down.

[0009] As an optional implementation of the above embodiments, determining whether the load has changed includes:

[0010] Determine whether the room door is open; or, determine whether the characteristic value of the change in ambient temperature reaches the preset ambient temperature change threshold.

[0011] If so, then determine the load change;

[0012] As an optional implementation of the above embodiments, the control method further includes:

[0013] If the load changes, a first duration or a second duration is obtained; the first duration is the time from the start of the load change to when the cooling temperature reaches the start-up temperature, and the second duration is the time from the start of the load change to when the cooling temperature reaches the stop-down temperature.

[0014] The step of obtaining the temperature rise characteristic value of the cooling temperature when the cooling temperature reaches the start-up temperature includes:

[0015] If the first duration is less than the first preset duration, then the temperature rise characteristic value of the cooling temperature is obtained;

[0016] The step of obtaining the temperature drop characteristic value of the cooling temperature when the cooling temperature reaches the shutdown point temperature includes:

[0017] If the second duration is less than the second preset duration, then the temperature drop characteristic value of the cooling temperature is obtained.

[0018] As an optional implementation of the above embodiments, the control method further includes:

[0019] If the first duration is longer than the first preset duration, then control the compressor to start; and / or

[0020] If the second duration is greater than the second preset duration, then the compressor is shut down.

[0021] As an optional implementation of the above embodiments, the control method further includes:

[0022] If the load remains unchanged, then when the cooling temperature reaches the start-up temperature, the compressor is controlled to start; and / or

[0023] If the load remains unchanged, the compressor will be shut down when the refrigeration temperature reaches the shutdown point.

[0024] As an optional implementation of the above embodiments, the control method further includes:

[0025] After the compressor is started, the compressor is forced to run for at least a third preset duration; and / or,

[0026] After the compressor is started, the operating time of the compressor is obtained;

[0027] If the running time reaches the fourth preset time, then control the compressor to be forcibly shut down or control the compressor to be forcibly shut down and remain in the shutdown state for the fifth preset time after the forced shutdown.

[0028] The third preset duration is less than the fourth preset duration.

[0029] As an optional implementation of the above embodiments, the refrigerator is a direct-cooling refrigerator and / or the cooling temperature is the surface temperature of the evaporator.

[0030] Secondly, embodiments of this application also propose a refrigerator, including a controller configured to perform the steps in the refrigerator control method described above.

[0031] Thirdly, embodiments of this application also provide a refrigerator control device, comprising:

[0032] The acquisition module is used to acquire the cooling temperature;

[0033] The judgment module is used to determine whether the load has changed;

[0034] The acquisition module is also used to acquire the temperature rise characteristic value of the cooling temperature when the cooling temperature reaches the start-up temperature if the load changes.

[0035] The control module is configured to control the compressor to start if the temperature rise characteristic value triggers a preset temperature rise condition; and / or;

[0036] The acquisition module is also used to acquire the temperature drop characteristic value of the cooling temperature when the cooling temperature reaches the shutdown point temperature if the load changes.

[0037] The control module is also used to control the compressor to shut down if the temperature drop characteristic value triggers a preset temperature drop condition.

[0038] Fourthly, embodiments of this application also propose a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to execute the steps in the refrigerator control method described above.

[0039] In the technical solution of this application embodiment, when a change in load is detected, a temperature rise characteristic value of the cooling temperature is obtained when the cooling temperature reaches the start-up point temperature. If the temperature rise characteristic value triggers a preset temperature rise condition, the change in load strongly interferes with the cooling temperature, and only then is the compressor controlled to start. Alternatively, when the cooling temperature reaches the stop-up point temperature, a temperature drop characteristic value of the cooling temperature is obtained. If the temperature drop characteristic value triggers a preset temperature drop condition, the change in load strongly interferes with the cooling temperature, and only then is the compressor controlled to stop. Therefore, compared with the prior art, the technical solution of this application, when the load changes, uses temperature rise or temperature drop characteristic values ​​to determine the degree of interference of the load change with the cooling temperature, and then determines whether to start or stop the compressor, which can avoid frequent compressor start-stop of the refrigerator due to load changes. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic flowchart of one embodiment of the refrigerator control method in this application;

[0042] Figure 2 This is a schematic flowchart of another embodiment of the refrigerator control method in this application;

[0043] Figure 3 This is a schematic flowchart of another embodiment of the refrigerator control method in this application;

[0044] Figure 4 This is a schematic flowchart of another embodiment of the refrigerator control method in this application;

[0045] Figure 5 This is a schematic diagram of the control device for a refrigerator in an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0049] This application provides a refrigerator, its control method and device, and a storage medium, which will be described in detail below.

[0050] A refrigerator is a common household appliance. A refrigerator consists of a refrigeration system, which includes a compressor, condenser, expansion joint, and evaporator. These components are connected sequentially, with the evaporator's outlet connected to the compressor's inlet, thus forming the refrigerant circulation path. When the compressor is running, it performs work on the low-temperature, low-pressure refrigerant, transforming it into a high-temperature, high-pressure refrigerant. This high-temperature, high-pressure refrigerant then releases heat in the condenser and expansion joint, becoming a low-temperature, low-pressure liquid refrigerant. This liquid refrigerant flows into the evaporator, providing cooling to the compartment; after absorbing heat in the evaporator, the refrigerant flows back into the compressor to participate in the next cycle.

[0051] The compressor's operation is controlled by the cooling temperature. The refrigerator has an on-time temperature and an off-time temperature. In the prior art, the compressor starts when the cooling temperature is higher than the on-time temperature and stops when the cooling temperature is lower than the off-time temperature. However, refrigerators are frequently used devices. For example, when a user opens a compartment door, the temperature inside the compartment changes, easily causing the cooling temperature to exceed the on-time temperature, thus causing the compressor to start frequently when the load changes. Therefore, this application provides a refrigerator control method to reduce the compressor's starting frequency when the refrigerator's load changes.

[0052] In some embodiments, the refrigerator provided in this embodiment is a direct-cooling refrigerator. In the prior art, direct-cooling refrigerators typically use mechanical thermostats to control the start and stop of the compressor. A mechanical thermostat is a temperature control device based on physical mechanical principles, triggering a switch through gas / liquid expansion, metal deformation, or bimetallic strip bending to control the compressor's start and stop. However, mechanical thermostats are limited by their structure, wear down with prolonged use, have a short lifespan, and low temperature control accuracy, easily leading to unreliable refrigeration. In contrast, the control method of this application embodiment uses an electronic thermostat to control the refrigerator; that is, by setting a temperature sensor and a controller, the temperature sensor collects the refrigeration temperature, and the steps corresponding to the control method of this application embodiment are loaded into the controller to form an intelligent temperature control system capable of precisely controlling the direct-cooling refrigerator. Compared to traditional mechanical thermostats, it uses digital signal processing, enabling higher precision and more intelligent temperature management.

[0053] In some embodiments, the cooling temperature is the surface temperature of the evaporator. A temperature sensor is installed on the surface of the evaporator to detect changes in the surface temperature of the refrigerator evaporator. The temperature signal is fed back to the control board through a signal conditioning circuit, which then controls the compressor to start or stop, thereby controlling the refrigerator compartment temperature. In the prior art, an air temperature sensor is installed inside the refrigerator compartment. Compared to the prior art, placing the temperature sensor on the evaporator surface allows for timely detection of temperature changes, avoiding untimely cooling or overcooling due to delayed temperature detection.

[0054] In some embodiments, the cooling temperature can also be the room temperature. The room temperature is used to determine whether the compressor needs to be turned on or off.

[0055] like Figure 1 The diagram shown is a flowchart of an embodiment of the refrigerator control method in this application. The refrigerator control method includes:

[0056] S100, obtains the cooling temperature;

[0057] S200, determine if the load has changed;

[0058] S300, if the load changes, when the cooling temperature reaches the start-up temperature, the temperature rise characteristic value of the cooling temperature is obtained; if the temperature rise characteristic value triggers a preset temperature rise condition, the compressor is controlled to start; and / or;

[0059] S400, if the load changes, when the cooling temperature reaches the shutdown point temperature, the temperature drop characteristic value of the cooling temperature is obtained; if the temperature drop characteristic value triggers a preset temperature drop condition, the compressor is controlled to shut down.

[0060] In the technical solution of this application embodiment, when a change in load is detected, a temperature rise characteristic value of the cooling temperature is obtained when the cooling temperature reaches the start-up temperature. If the temperature rise characteristic value triggers a preset temperature rise condition, the change in load strongly interferes with the cooling temperature, and only then is the compressor controlled to start. Alternatively, when the cooling temperature reaches the stop-down temperature, a temperature drop characteristic value of the cooling temperature is obtained. If the temperature drop characteristic value triggers a preset temperature drop condition, the change in load interferes with the operation of the compressor or causes the cooling temperature to be too low, and only then is the compressor controlled to stop. Therefore, compared with the prior art, the technical solution of this application, when the load changes, uses a temperature rise characteristic value or a temperature drop characteristic value combined with a corresponding preset temperature rise condition or preset temperature drop condition to determine the degree of interference of the load change with the cooling temperature, and then determines whether to start or stop the compressor, which can avoid frequent compressor start-stop of the refrigerator due to load changes.

[0061] In other words, in existing technologies, when the load changes, the compressor will start or stop when the cooling temperature reaches the start-up temperature or the stop-down temperature. However, the technical solution adopted in this application uses temperature rise or temperature drop characteristic values ​​to determine the degree of interference between load changes and the cooling temperature; only when the impact is significant will the compressor maintain its current operating state, eliminating the need for frequent start-ups and shutdowns.

[0062] In some embodiments, the temperature rise characteristic value includes a temperature rise value or a temperature rise rate. The preset temperature drop condition includes a preset temperature rise characteristic threshold, and includes a preset temperature rise threshold or a preset temperature rise rate threshold. The preset temperature rise rate threshold is used to prevent the temperature inside the compartment from rising too quickly; the preset temperature rise threshold is used to prevent the temperature inside the compartment from exceeding an upper limit and becoming overheated. The preset temperature drop condition includes a temperature rise rate reaching the preset temperature rise rate threshold; at this time, it indicates that a change in load will cause a sharp rise in the temperature inside the compartment, therefore, the compressor is controlled to start cooling to reduce the impact of load changes on the compartment temperature; the compressor is controlled to start; or the preset temperature drop condition further includes: controlling the compressor to start when the temperature rise value reaches the preset temperature rise threshold. In some embodiments, the preset temperature drop condition further includes controlling the compressor to start if the temperature rise rate is less than the preset temperature rise rate threshold, i.e., the temperature rise rate is relatively slow, but the cooling temperature reaches the start-up temperature + the preset temperature rise threshold, to prevent the cooling temperature from rising too much and causing the temperature inside the compartment to become overheated, thus affecting food preservation. Therefore, while reducing the frequency of compressor operation, the preservation effect on food is also taken into account.

[0063] In this embodiment, the reason why the compressor should be turned on based on the temperature rise characteristic value and the preset temperature rise characteristic threshold after a load change is that a load change will cause fluctuations in the cooling temperature. These fluctuations may be temporary, briefly causing the cooling temperature to reach above the start-up temperature. The load change will have a minor impact on the temperature inside the room and will not cause overheating in the short term, thus eliminating the need to turn on the compressor and reducing the frequency of start-ups. However, if these fluctuations cause the cooling temperature to reach above the start-up temperature, and result in an excessively rapid temperature rise rate or an excessively high temperature rise value, it indicates that the load change will cause severe disturbance or overheating of the temperature inside the room, and only then will the compressor be turned on.

[0064] In some embodiments, the preset temperature rise threshold or preset temperature rise rate threshold is set based on performance testing of the refrigerator; different values ​​may be used by implementers in specific embodiments, and no specific restrictions are imposed in this application. For example, the preset temperature rise threshold may be 1℃, 0.8℃, etc. The preset temperature rise rate threshold may be 0.2℃ / min or 0.15℃ / min.

[0065] In some embodiments, the temperature drop characteristic value includes a temperature drop value or a temperature drop rate; the preset temperature drop condition includes a preset temperature drop characteristic threshold, which includes a preset temperature drop threshold or a preset temperature drop rate threshold. The preset temperature drop rate threshold is used to prevent the temperature in the compartment from dropping too slowly; the preset temperature drop threshold is used to prevent the temperature in the compartment from exceeding a lower limit and becoming too cold. The preset temperature drop condition may be: when the temperature drop rate is less than the preset temperature drop rate threshold, it indicates that the load change will cause the temperature in the compartment to drop slowly, therefore, the compressor is controlled to shut down to reduce the slow cooling rate, which would cause the compressor to operate at very low speeds and consume too much power; or the preset temperature drop condition may be: when the temperature drop value reaches the preset temperature drop threshold, the compressor is controlled to shut down. In some embodiments, the preset temperature drop condition may be: if the temperature drop rate is greater than the preset temperature drop rate threshold, that is, the temperature drops relatively too quickly, and the cooling temperature reaches the shutdown point temperature - the preset temperature drop threshold, the compressor is controlled to shut down to prevent the cooling temperature from dropping too quickly and causing the temperature in the compartment to become too cold, which would affect food preservation and cause the compartment to freeze easily. Therefore, while reducing the frequency of compressor shutdown to protect the compressor, it also ensures the preservation of food and reduces the possibility of ice buildup in the compartments.

[0066] In this embodiment, the reason why the compressor should be shut down based on the temperature drop characteristic value and the preset temperature drop characteristic threshold after a load change is that a load change will cause fluctuations in the cooling temperature or changes in the compressor's operating power. These changes are only temporary, briefly causing the cooling temperature to drop below the shutdown point temperature, and the change in operating power will not be significant, thus eliminating the need to shut down and reducing the frequency of shutdowns. However, if these fluctuations cause the cooling temperature to drop below the shutdown point temperature, and result in an excessively low temperature drop rate or an excessively high temperature drop value, it indicates that the compressor's cooling efficiency is low, power consumption is high, or it is prone to causing the compartment to become too cold; only then will the compressor be shut down.

[0067] In some embodiments, the preset temperature drop threshold or preset temperature drop rate threshold is set based on performance testing of the refrigerator; different values ​​may be used by implementers in specific embodiments, and no specific restrictions are imposed in this application. For example, the preset temperature drop threshold may be 1℃, 0.8℃, etc. The preset temperature drop rate threshold may be 0.05℃ / min or 0.1℃ / min.

[0068] In some embodiments, when the cooling temperature reaches the start-up temperature, obtaining the temperature rise characteristic value of the cooling temperature includes: calculating the temperature rise characteristic value of the cooling temperature based on the cooling temperature collected after the cooling temperature reaches the start-up temperature. For example, the cooling temperature collected in each collection cycle minus the start-up temperature is the temperature rise value for the current collection cycle; if this temperature rise value is greater than a preset temperature rise threshold, the compressor is controlled to start. And / or the ratio of the difference between the cooling temperatures collected in N adjacent collection cycles to the total duration of the N collection cycles is the temperature rise rate. For example, the ratio of the difference between the cooling temperatures collected in one adjacent collection cycle to one collection cycle is the temperature rise rate. Alternatively, based on the cooling temperature collected after the cooling temperature reaches the start-up temperature, a cooling temperature change curve over time is obtained, and the temperature rise rate and the temperature rise value at each collection point are obtained based on this change curve.

[0069] In some embodiments, when the cooling temperature reaches the shutdown point temperature, obtaining the temperature drop characteristic value of the cooling temperature includes: calculating the temperature drop characteristic value of the cooling temperature based on the cooling temperature collected after the cooling temperature reaches the shutdown point temperature. For example, the cooling temperature collected in each collection cycle minus the shutdown point temperature is the temperature drop value for the current collection cycle; if this temperature drop value reaches a preset temperature drop threshold, the compressor is controlled to shut down. And / or the ratio of the difference between the cooling temperatures collected in N adjacent collection cycles to the total duration of the N collection cycles is the temperature drop rate. For example, the ratio of the difference between the cooling temperatures collected in one adjacent collection cycle to one collection cycle is the temperature drop rate. Alternatively, based on the cooling temperature collected after the cooling temperature reaches the shutdown point temperature, a cooling temperature change curve over time is obtained, and the temperature drop rate and the temperature drop value at each collection point are obtained based on this change curve.

[0070] In some embodiments, if the load changes, when the cooling temperature reaches the shutdown point temperature, the temperature drop characteristic value of the cooling temperature and the operating time of the compressor are obtained.

[0071] If the temperature drop characteristic value triggers a preset temperature drop condition and the running time reaches a sixth preset duration, the compressor is shut down. This avoids the compressor from sudden start-up and shutdown in a short period.

[0072] In some embodiments, both the temperature drop characteristic value and the temperature rise characteristic value are absolute values.

[0073] In some embodiments, taking the evaporator surface temperature as an example, the start-up temperature and stop-down temperature are determined based on the cooling level selected by the user. For example, the start-up temperature and stop-down temperature can be set with reference to the table below.

[0074]

[0075]

[0076] In this embodiment, the temperature control knob, indicated by the arrow, shows progressively increasing numbers, with the cooling effect increasing and the room temperature gradually decreasing, up to level 7 being the strongest setting. Under normal load conditions, when the evaporator surface temperature is less than or equal to the shutdown point temperature at the corresponding ambient temperature, the control board shuts down the compressor. Under normal load conditions, when the evaporator surface temperature is greater than or equal to the start-up point temperature at the corresponding ambient temperature, the control board starts the compressor, and the refrigeration system operates to cool the room.

[0077] As an optional implementation of the above embodiments, determining whether the load has changed includes:

[0078] Determine whether the room door is open; or, determine whether the characteristic value of the change in ambient temperature reaches the preset ambient temperature change threshold.

[0079] If so, then determine the load change.

[0080] In this embodiment, load changes include the opening of the compartment door. When the compartment door is open, the compartment is connected to the outside, causing a change in the internal load. When the compartment door is open, the user may remove stored items from the compartment or place items that need to be stored into the compartment, which also causes a change in load. For example, if a user places hot food into the refrigerator compartment, it will inevitably cause a change in load. For example, if the compressor is in a stopped state, the impact of hot food on the cooling temperature can be assessed to determine whether the compressor needs to be started immediately.

[0081] In this embodiment, changes in ambient temperature also cause changes in load. When the ambient temperature changes, the refrigerator's heat load changes, meaning the load the refrigerator faces changes. For example, if the compressor is off and the ambient temperature rises rapidly in a short period, the refrigerator's heat load will increase rapidly. In this case, the impact of the heat load on the cooling temperature change is assessed to determine whether the compressor needs to be started immediately.

[0082] like Figure 2 As shown, as an optional implementation of the above embodiments, the control method further includes:

[0083] If the load changes, a first duration or a second duration is obtained; the first duration is the time from the start of the load change to when the cooling temperature reaches the start-up temperature, and the second duration is the time from the start of the load change to when the cooling temperature reaches the stop-down temperature.

[0084] S700, determine whether the first duration is less than the first preset duration; or

[0085] S800, determine whether the second duration is less than the second preset duration;

[0086] The step of obtaining the temperature rise characteristic value of the cooling temperature when the cooling temperature reaches the start-up temperature includes:

[0087] S301, if the first duration is less than the first preset duration, then obtain the temperature rise characteristic value of the cooling temperature;

[0088] The step of obtaining the temperature drop characteristic value of the cooling temperature when the cooling temperature reaches the shutdown point temperature includes:

[0089] S401, if the second duration is less than the second preset duration, then obtain the temperature drop characteristic value of the cooling temperature.

[0090] In this embodiment, timing begins when a load change occurs and continues until the cooling temperature reaches the start-up temperature; the duration of this time is designated as the first duration. If the first duration is less than a first preset duration, it indicates that the load change has caused a non-steady-state cooling temperature within the first duration, suggesting a potential for a relatively rapid temperature rise. Therefore, further, by acquiring the temperature rise characteristic value of the cooling temperature, it is determined whether the load change has triggered the condition requiring the compressor to start; that is, it is further determined whether the non-steady-state cooling temperature is persistent, and not simply that the compressor starts when the cooling temperature reaches the start-up temperature.

[0091] In some embodiments, when the cooling temperature reaches the start-up temperature, obtaining the temperature rise characteristic value of the cooling temperature includes: calculating the temperature rise characteristic value of the cooling temperature based on the cooling temperature collected after the load change. For example, the ratio of the difference between the cooling temperatures collected in N adjacent collection cycles to the total duration of the N collection cycles is the temperature rise rate. For example, the ratio of the difference between the cooling temperatures collected in one adjacent collection cycle to one collection cycle is the temperature rise rate. Alternatively, based on the cooling temperature collected after the load change, a curve of the cooling temperature changing over time is obtained, and the temperature rise rate and the temperature rise value at each collection point are obtained from this curve. In an embodiment, if when the cooling temperature reaches the start-up temperature, the first duration is less than a first preset duration, and the temperature rise rate exceeds a preset temperature rise rate threshold, it indicates that the cooling temperature rise caused by the load change is continuous, and in this case, it is necessary to control the compressor to start. If the first time interval is less than the first preset time interval and the temperature rise rate is lower than the preset temperature rise rate threshold when the cooling temperature reaches the start-up temperature, it indicates that the load change will cause the cooling temperature to be unsteady. However, since the rise rate is slow, the compressor does not need to be turned on when the cooling temperature reaches the start-up temperature. The compressor will only be turned on when the cooling temperature reaches the start-up temperature plus the preset temperature rise threshold.

[0092] In this embodiment, timing begins when a load change occurs and continues until the cooling temperature reaches the shutdown point temperature; the duration of this time is termed the second duration. If the second duration is less than a second preset duration, it indicates that the load change has caused a non-steady-state cooling temperature within the second duration, suggesting a potential for a relatively rapid temperature drop. Therefore, further, by acquiring the temperature drop characteristic value of the cooling temperature, it is determined whether the load change has triggered the condition requiring the compressor to start; that is, it is further determined whether the non-steady-state cooling temperature is persistent, and whether the compressor starts automatically only when the cooling temperature reaches the shutdown point temperature.

[0093] In some embodiments, when the cooling temperature reaches the shutdown point temperature, obtaining the temperature drop characteristic value of the cooling temperature includes: calculating the temperature drop characteristic value of the cooling temperature based on the cooling temperature collected after the load change. For example, the ratio of the difference between the cooling temperatures collected in N adjacent collection cycles to the total duration of the N collection cycles is the temperature drop rate. For example, the ratio of the difference between the cooling temperatures collected in one adjacent collection cycle to one collection cycle is the temperature drop rate. Alternatively, based on the cooling temperature collected after the load change, a curve of the cooling temperature changing over time is obtained, and the temperature drop rate and the temperature drop value at each collection point are obtained from this curve. In an embodiment, if when the cooling temperature reaches the shutdown point temperature, the second duration is less than the second preset duration, and the temperature drop rate is less than the preset temperature drop rate threshold, it indicates that the compressor operating power has decreased due to the load change, and the compressor needs to be started. If the second duration is less than the second preset duration and the temperature drop rate is higher than the preset temperature drop rate threshold when the cooling temperature reaches the shutdown point temperature, it indicates that the compressor's operating power is still acceptable. In this case, the compressor does not need to be shut down when the cooling temperature reaches the shutdown point temperature. The compressor will only be shut down when the cooling temperature reaches the shutdown point temperature minus the preset temperature drop threshold (set to a positive number in the system).

[0094] As an optional implementation of the above embodiments, such as Figure 3 As shown, the control method further includes:

[0095] S701, if the first duration is longer than the first preset duration, then control the compressor to start; and / or

[0096] S801, if the second duration is greater than the second preset duration, then control the compressor to shut down.

[0097] In this embodiment, although the change in load will cause a change in the cooling temperature, the cooling temperature has not yet reached or just reached the start-up temperature within the first preset time period. This indicates that the change in load has little impact on the cooling temperature within the first preset time period and does not cause large fluctuations. The cooling temperature slowly rises to the start-up temperature amid fluctuations, and the cooling temperature is relatively stable. Therefore, when the cooling temperature reaches the start-up temperature, the compressor is controlled to start.

[0098] In this embodiment, although the change in load will cause a change in the cooling temperature, the cooling temperature has not yet reached or just reached the shutdown point temperature within the second preset time period. This indicates that the change in load has little impact on the cooling temperature within the second preset time period and does not produce large fluctuations. The cooling temperature slowly decreases to the shutdown point temperature during the fluctuations, and the cooling temperature is relatively stable. Therefore, when the cooling temperature reaches the shutdown point temperature, the compressor is controlled to start.

[0099] As an optional implementation of the above embodiments, such as Figure 4 As shown, the control method further includes:

[0100] S500, if the load remains unchanged, then when the cooling temperature reaches the start-up point temperature, control the compressor to start; and / or

[0101] S600, if the load remains unchanged, the compressor is shut down when the refrigeration temperature reaches the shutdown point temperature.

[0102] In this embodiment, if the load remains unchanged, the refrigerator operates in a steady state. During steady-state operation, the compartment temperature of the refrigerator is controllable, and the compressor's start-up and shutdown are stable. Therefore, when the load remains unchanged, the compressor is started when the cooling temperature reaches the start-up point temperature; and the compressor is shut down when the cooling temperature reaches the stop-down point temperature, thus maintaining a steady-state compartment temperature inside the refrigerator.

[0103] As an optional implementation of the above embodiments, the control method further includes:

[0104] After the compressor is started, the compressor is forced to run for at least a third preset duration; and / or,

[0105] After the compressor is started, the operating time of the compressor is obtained;

[0106] If the running time reaches the fourth preset time, then control the compressor to be forcibly shut down or control the compressor to be forcibly shut down and remain in the shutdown state for the fifth preset time after the forced shutdown.

[0107] The third preset duration is less than the fourth preset duration.

[0108] In this embodiment, to avoid frequent compressor start-ups, a third preset time is set. This ensures that the compressor runs for a minimum preset time after startup before being allowed to shut down, preventing damage caused by sudden compressor stops and improving compressor lifespan, as well as the stability and reliability of the refrigeration system. For example, the third preset time can be 2 minutes. That is, after the compressor is started, it must run for at least 2 minutes before being allowed to stop.

[0109] Direct-cooling refrigerators commonly use fixed-frequency compressors, and existing direct-cooling refrigerators employ mechanical thermostats. During freezing capacity tests, the compressor's continuous operation for extended periods can lead to excessively cold (<0°C) temperatures in the refrigerator compartment. Therefore, in the technical solution of this application, the compressor is also configured with a maximum operating time. That is, after running for a fourth preset time, the compressor needs to be shut down once to avoid damage to the compressor from prolonged operation and to overcome the problem of excessively cold refrigerator compartment temperatures caused by prolonged continuous operation during freezing capacity tests. For example, the fourth preset time can be 4 hours. That is, after the compressor is turned on and runs continuously for 4 hours, it will be forcibly shut down once. In some embodiments, after running for the fourth preset time, the compressor is shut down once and remains in a forced-off state for a fifth preset time after shutdown, without any startup operation. In this embodiment, the fifth preset time can be 20 minutes.

[0110] In the above embodiments, the third preset duration, the fourth preset duration, or the fifth preset duration are all set by the implementer, without any specific restrictions.

[0111] To better implement the refrigerator control method in the embodiments of this application, based on the refrigerator control method, the embodiments of this application also provide a refrigerator control device, such as... Figure 5 As shown, the control device of the refrigerator includes:

[0112] Module 10 is used to acquire the cooling temperature;

[0113] Module 20 is used to determine whether the load has changed;

[0114] The acquisition module 10 is also used to acquire the temperature rise characteristic value of the cooling temperature when the cooling temperature reaches the start-up point temperature if the load changes.

[0115] Control module 30 is configured to control the compressor to start if the temperature drop characteristic value triggers a preset temperature drop condition; and / or;

[0116] The acquisition module 10 is also used to acquire the temperature drop characteristic value of the cooling temperature when the cooling temperature reaches the shutdown point temperature if the load changes.

[0117] The control module 30 is also used to control the compressor to shut down if the temperature drop characteristic value triggers a preset temperature drop condition.

[0118] This application also proposes a refrigerator control system, including: one or more processors; a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the refrigerator control method as described above.

[0119] Typically, the refrigerator's control system includes at least one processor, at least one memory, and a control program for the refrigerator's control system stored in the memory and executable on the processor. The control program for the refrigerator's control system is configured to implement the steps of the control method described above.

[0120] The processor may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor can be implemented using at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor may also include a main processor and coprocessors. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. The processor may also include an AI (Artificial Intelligence) processor, which handles the control method operations of the refrigerator's control system, enabling the control method model of the refrigerator's control system to learn autonomously, improving efficiency and accuracy.

[0121] The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory is used to store at least one instruction, which is executed by a processor to implement the refrigerator control method of the refrigerator control system provided in the method embodiments of this application.

[0122] Obtain the cooling temperature;

[0123] Determine if the load has changed;

[0124] If the load changes, when the cooling temperature reaches the start-up temperature, the temperature rise characteristic value of the cooling temperature is obtained; if the temperature rise characteristic value triggers a preset temperature rise condition, the compressor is controlled to start; and / or;

[0125] If the load changes, when the cooling temperature reaches the shutdown point temperature, the temperature drop characteristic value of the cooling temperature is obtained; if the temperature drop characteristic value triggers a preset temperature drop condition, the compressor is controlled to shut down.

[0126] As an optional implementation of the above embodiments, determining whether the load has changed includes:

[0127] Determine whether the room door is open; or, determine whether the characteristic value of the change in ambient temperature reaches the preset ambient temperature change threshold.

[0128] If so, then determine the load change;

[0129] As an optional implementation of the above embodiments, the control method further includes:

[0130] If the load changes, a first duration or a second duration is obtained; the first duration is the time from the start of the load change to when the cooling temperature reaches the start-up temperature, and the second duration is the time from the start of the load change to when the cooling temperature reaches the stop-down temperature.

[0131] The step of obtaining the temperature rise characteristic value of the cooling temperature when the cooling temperature reaches the start-up temperature includes:

[0132] If the first duration is less than the first preset duration, then the temperature rise characteristic value of the cooling temperature is obtained;

[0133] The step of obtaining the temperature drop characteristic value of the cooling temperature when the cooling temperature reaches the shutdown point temperature includes:

[0134] If the second duration is less than the second preset duration, then the temperature drop characteristic value of the cooling temperature is obtained.

[0135] As an optional implementation of the above embodiments, the control method further includes:

[0136] If the first duration is longer than the first preset duration, then control the compressor to start; and / or

[0137] If the second duration is greater than the second preset duration, then the compressor is shut down.

[0138] As an optional implementation of the above embodiments, the control method further includes:

[0139] If the load remains unchanged, then when the cooling temperature reaches the start-up temperature, the compressor is controlled to start; and / or

[0140] If the load remains unchanged, the compressor will be shut down when the refrigeration temperature reaches the shutdown point.

[0141] As an optional implementation of the above embodiments, the control method further includes:

[0142] After the compressor is started, the compressor is forced to run for at least a third preset duration; and / or,

[0143] After the compressor is started, the operating time of the compressor is obtained;

[0144] If the running time reaches the fourth preset time, then control the compressor to be forcibly shut down or control the compressor to be forcibly shut down and remain in the shutdown state for the fifth preset time after the forced shutdown.

[0145] The third preset duration is less than the fourth preset duration.

[0146] As an optional implementation of the above embodiments, the refrigerator is a direct-cooling refrigerator and / or the cooling temperature is the surface temperature of the evaporator.

[0147] The above provides a detailed description of a refrigerator and its control method, apparatus, and computer-readable storage medium provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for controlling a refrigerator, characterized in that, include: Obtain the cooling temperature; Determine if the load has changed; If the load changes, then when the cooling temperature reaches the start-up temperature, the temperature rise characteristic value of the cooling temperature is obtained; If the temperature rise characteristic value triggers the preset temperature rise condition, then the compressor is controlled to start. and / or; If the load changes, when the cooling temperature reaches the shutdown point temperature, the temperature drop characteristic value of the cooling temperature is obtained; if the temperature drop characteristic value triggers a preset temperature drop condition, the compressor is controlled to shut down.

2. The control method as described in claim 1, characterized in that, The determination of whether the load has changed includes: Determine whether the room door is open; or determine whether the characteristic value of the change in ambient temperature has reached the preset ambient temperature change threshold. If so, then determine the load change.

3. The control method as described in claim 1, characterized in that, The control method further includes: If the load changes, a first duration or a second duration is obtained; the first duration is the time from the start of the load change to when the cooling temperature reaches the start-up temperature, and the second duration is the time from the start of the load change to when the cooling temperature reaches the stop-down temperature. The step of obtaining the temperature rise characteristic value of the cooling temperature when the cooling temperature reaches the start-up temperature includes: If the first duration is less than the first preset duration, then the temperature rise characteristic value of the cooling temperature is obtained; The step of obtaining the temperature drop characteristic value of the cooling temperature when the cooling temperature reaches the shutdown point temperature includes: If the second duration is less than the second preset duration, then the temperature drop characteristic value of the cooling temperature is obtained.

4. The control method as described in claim 3, characterized in that, The control method further includes: If the first duration is longer than the first preset duration, then control the compressor to start; and / or If the second duration is greater than the second preset duration, then the compressor is shut down.

5. The control method as described in claim 1, characterized in that, The control method further includes: If the load remains unchanged, then when the cooling temperature reaches the start-up temperature, the compressor is controlled to start; and / or If the load remains unchanged, the compressor will be shut down when the refrigeration temperature reaches the shutdown point.

6. The control method as described in claim 1, characterized in that, The control method further includes: After the compressor is started, the compressor is forced to run for at least a third preset duration; and / or, After the compressor is started, the operating time of the compressor is obtained; If the running time reaches the fourth preset time, then control the compressor to be forcibly shut down or control the compressor to be forcibly shut down and remain in the shutdown state for the fifth preset time after the forced shutdown. The third preset duration is less than the fourth preset duration.

7. The control method as described in claim 1, characterized in that, The refrigerator is a direct-cooling refrigerator and / or the cooling temperature is the surface temperature of the evaporator.

8. A refrigerator, characterized in that, Includes a controller configured to perform the steps of the refrigerator control method according to any one of claims 1 to 7.

9. A control device for a refrigerator, characterized in that, include: The acquisition module is used to acquire the cooling temperature; The judgment module is used to determine whether the load has changed; The acquisition module is also used to acquire the temperature rise characteristic value of the cooling temperature when the cooling temperature reaches the start-up temperature if the load changes. The control module is used to control the compressor to start if the temperature rise characteristic value triggers a preset temperature rise condition; and / or; The acquisition module is also used to acquire the temperature drop characteristic value of the cooling temperature when the cooling temperature reaches the shutdown point temperature if the load changes. The control module is also used to control the compressor to shut down if the temperature drop characteristic value triggers a preset temperature drop condition.

10. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps of the refrigerator control method according to any one of claims 1 to 7.

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