Refrigerator and defrosting control method thereof

Abstract

The invention discloses a refrigerator and a defrosting control method thereof, which can comprehensively and accurately divide the operation time period of the refrigerator according to the actual use behavior of a user, intelligently adjust the defrosting period in different time periods by combining factors such as a user behavior evaluation value, analyze and evaluate the user behavior by detecting the user behavior parameter of the refrigerator, and improve the defrosting efficiency of the refrigerator. Therefore, the defrosting period is reasonably determined, the refrigerating efficiency of the refrigerator can be improved, the freshness of food can be better kept, and energy consumption can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of refrigerators, and in particular to a refrigerator and a defrosting control method thereof. Background Art

[0002] As a key appliance for storing food, the performance and intelligence of refrigerators are attracting more and more attention. With the improvement of living standards, people have higher requirements for the preservation and storage quality of food, and also pay more attention to the energy saving and convenience of home appliances. Most traditional refrigerator defrosting modes use fixed defrosting cycle settings, that is, defrosting operations are performed at preset time intervals. In actual use, users have different habits and frequencies of using refrigerators, and the frosting conditions in the refrigerator will also vary greatly due to user usage behaviors. For example, during the user's use period, users may frequently open the refrigerator door to take out ingredients or store food, which will cause large temperature fluctuations in the refrigerator, thereby accelerating the frosting speed of the evaporator. In this case, traditional refrigerators still defrost according to a fixed defrosting cycle, which may result in untimely defrosting, resulting in too thick a layer of frost on the evaporator, affecting the refrigeration effect, increasing energy consumption, and also reducing the quality of food preservation. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a refrigerator and a defrost control method thereof, which can reasonably adjust the defrost cycle of the refrigerator, improve the refrigeration efficiency of the refrigerator, and better maintain the freshness of food.

[0004] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0005] a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber and a freezing chamber;

[0006] A refrigeration system, used to provide coldness for the refrigerator, the refrigeration system comprising a compressor, a condenser and an evaporator connected by pipelines;

[0007] Controller, the controller is configured as:

[0008] When it is detected that the door of any storage room is opened in the current detection cycle, the user behavior parameters when the door is opened are obtained;

[0009] Dividing the current detection cycle into time periods according to the user behavior parameter; wherein the current detection cycle includes at least one user use time period, at least one cooling recovery time period and at least one normal operation time period;

[0010] When the refrigerator is in a user use time period, obtaining a user behavior parameter detected within a certain time period before entering the user use time period, and determining a first standard value according to the user behavior parameter;

[0011] Calculate the first defrost cycle duration according to the first duration corresponding to the user usage time period, the first standard value and the initialization defrost cycle duration;

[0012] The defrost cycle of the refrigerator is updated according to the duration of the first defrost cycle.

[0013] The above technical solution has the following advantages or beneficial effects: determining the first standard value according to the user behavior parameter, and then calculating the first defrost cycle duration to update the evaporator defrost cycle, which can make the defrost operation more in line with the actual use conditions. During the user's use period, the frequent opening of the door will lead to an increase in the entry of hot and humid air around the evaporator, making it easier to frost. At this time, shortening the defrost cycle can remove the frost layer in time, ensure the heat exchange efficiency of the evaporator, maintain the efficient operation of the refrigeration system, and ensure that the refrigerator can quickly and stably provide cold capacity for each storage room. Compared with the fixed defrost cycle, the refrigeration efficiency is greatly improved. In addition, traditional refrigerators use a fixed defrost cycle, which may defrost when the evaporator is not seriously frosted, resulting in a waste of electricity. The solution can dynamically adjust the defrost cycle according to the actual user's use. By reasonably controlling the defrost frequency, the overall energy consumption of the refrigerator is reduced, helping users save electricity costs, and is also in line with the environmental protection concept of energy conservation and emission reduction.

[0014] In some embodiments of the present application, the controller is further configured to:

[0015] When the refrigerator runs into the refrigeration recovery time period, acquiring a user behavior parameter detected within a certain time period before entering the refrigeration recovery time period, and determining a second standard value according to the user behavior parameter;

[0016] Calculate the second defrost cycle duration according to the second duration corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration;

[0017] The defrost cycle of the refrigerator is updated according to the duration of the second defrost cycle.

[0018] The above technical solution has the following advantages or beneficial effects: in the refrigeration recovery time period, the second standard value is determined by obtaining the user behavior parameters within a certain period of time before entering the time period, which can accurately judge the actual operating state of the refrigerator after experiencing frequent use stages such as catering. Different users have different subsequent usage frequencies and durations after using the refrigerator. This evaluation value enables the refrigerator to flexibly adjust the defrost cycle according to specific user behavior, ensuring that the defrost operation matches the actual frosting conditions inside the refrigerator, and achieving more precise operation control. In addition, the second defrost cycle duration is calculated based on the second standard value, the second duration corresponding to the refrigeration recovery time period, and the first defrost cycle duration, and the defrost cycle is updated accordingly, which can improve the calculation accuracy of the defrost cycle duration in the refrigeration recovery time period.

[0019] In some embodiments of the present application, the controller is further configured to:

[0020] When the refrigerator is in a normal operation time period, the defrost cycle of the refrigerator is controlled to keep the second defrost cycle length unchanged.

[0021] The above technical solution has the following advantages or beneficial effects: During the normal operation period, the temperature inside the refrigerator is relatively stable, the frosting speed is also relatively stable, and the defrost cycle is kept constant at the second defrost cycle length, thus avoiding the equipment instability factor that may be caused by frequent adjustment of the defrost cycle. At the same time, since the second defrost cycle length is reasonably calculated based on the previous user behavior and operating status, it remains unchanged during this period, and a relatively energy-saving defrost frequency can be maintained, which not only ensures the normal operation of components such as the evaporator, but also avoids energy waste due to excessive defrosting, thus achieving a good balance between stable operation and energy saving.

[0022] In some embodiments of the present application, after calculating the first defrost cycle duration according to the first duration corresponding to the user usage time period, the first standard value and the initialization frost cycle, the controller is further configured to:

[0023] When the first defrost cycle duration is shorter than a preset shortest defrost cycle duration, the shortest defrost cycle duration is used as the first defrost cycle duration.

[0024] The above technical solution has the following advantages or beneficial effects: the shortest defrost cycle duration is set and adjusted when the first defrost cycle duration is less than the value, ensuring that the defrost operation has enough time to complete. If the defrost cycle is too short, the frost on the evaporator may not be completely melted, resulting in accumulation of frost layer, affecting the heat exchange efficiency of the evaporator, and further affecting the normal operation of the refrigeration system. By taking the shortest defrost cycle duration as the first defrost cycle duration, it is ensured that the defrost process can be fully carried out, the normal working state of the evaporator is maintained, and the stable operation of the refrigerator refrigeration system is guaranteed.

[0025] In some embodiments of the present application, after calculating the second defrost cycle duration according to the second duration corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration, the controller is further configured as follows:

[0026] When the second defrost cycle duration is shorter than a preset shortest defrost cycle duration, the shortest defrost cycle duration is used as the second defrost cycle duration.

[0027] The above technical solution has the following advantages or beneficial effects: the shortest defrost cycle duration is set and adjusted when the second defrost cycle duration is less than the value, ensuring that the defrost operation has enough time to complete. If the defrost cycle is too short, the frost on the evaporator may not be completely melted, resulting in accumulation of frost layer, affecting the heat exchange efficiency of the evaporator, and further affecting the normal operation of the refrigeration system. By using the shortest defrost cycle duration as the second defrost cycle duration, it is ensured that the defrost process can be fully carried out, the normal working state of the evaporator is maintained, and the stable operation of the refrigerator refrigeration system is guaranteed.

[0028] In some embodiments of the present application, the initialization frost cycle duration is the defrost cycle duration last updated in the previous detection cycle; or, the initialization frost cycle duration is a preset fixed defrost cycle duration.

[0029] The above technical solution has the following advantages or beneficial effects: the defrost cycle duration last updated in the previous detection cycle is used as the initial defrost cycle duration, so that the refrigerator can continue the previous reasonable defrost mode at the beginning of a new detection cycle. Since the defrost cycle of the previous cycle is determined based on the user behavior at the time, the operating status of the refrigerator and other factors, this continuity helps to maintain the stability of the temperature inside the refrigerator and avoid temperature fluctuations caused by sudden changes in the defrost cycle, thereby better ensuring the freshness of food. Using a preset fixed defrost cycle duration as the initial defrost cycle duration greatly simplifies the logic of the refrigerator control system. For some scenarios where user behavior is relatively stable and the requirements for refrigerator intelligence are not particularly high, the fixed defrost cycle can meet basic usage requirements while reducing the calculation amount and complexity of the system.

[0030] In some embodiments of the present application, dividing the current detection period into time periods according to the user behavior parameters includes:

[0031] When the user behavior parameter meets the preset user behavior condition for the first time in the current detection cycle, it is determined that the refrigerator enters the first user use time period of the current detection cycle;

[0032] Obtaining a first duration corresponding to the first user usage time period;

[0033] Determine a second duration corresponding to the cooling recovery time period according to the first duration, and determine a third duration of the normal operation time period according to the first duration and the second duration;

[0034] The remaining user use time period, cooling recovery time period and normal operation time period in the current detection cycle are determined according to the first time period, the second time period and the third time period.

[0035] The above technical solution has the following advantages or beneficial effects: different users use the refrigerator for different lengths of time during the user usage time period. By obtaining the first duration of the first user usage time period to determine the subsequent time periods, it is possible to closely fit the user's specific usage habits. Accurate time period division and duration determination enable the refrigerator to adopt targeted temperature control strategies at different stages. In addition, the reasonable determination of the second duration of the refrigeration recovery time period can ensure that the temperature in the refrigerator can be promptly and stably restored to an appropriate level after the user usage time period, thereby ensuring the preservation of food. At the same time, the third duration of the normal operation time period is determined based on the first duration and the second duration, which avoids excessive operation of the refrigerator under unnecessary circumstances and reduces energy consumption.

[0036] To achieve the above object, an embodiment of the present invention further provides a defrosting control method for a refrigerator, comprising:

[0037] When it is detected that a door of any storage compartment of the refrigerator is opened in the current detection cycle, a user behavior parameter of the door when it is opened is obtained;

[0038] Dividing the current detection cycle into time periods according to the user behavior parameter; wherein the current detection cycle includes at least one user use time period, at least one cooling recovery time period and at least one normal operation time period;

[0039] When the refrigerator is in a user use time period, obtaining a user behavior parameter detected within a certain time period before entering the user use time period, and determining a first standard value according to the user behavior parameter;

[0040] Calculate the first defrost cycle duration according to the first duration corresponding to the user usage time period, the first standard value and the initialization defrost cycle duration;

[0041] The defrost cycle of the refrigerator is updated according to the duration of the first defrost cycle.

[0042] The above technical solution has the following advantages or beneficial effects: determining the first standard value according to the user behavior parameter, and then calculating the first defrost cycle duration to update the evaporator defrost cycle, which can make the defrost operation more in line with the actual use conditions. During the user's use period, the frequent opening of the door will lead to an increase in the entry of hot and humid air around the evaporator, making it easier to frost. At this time, shortening the defrost cycle can remove the frost layer in time, ensure the heat exchange efficiency of the evaporator, maintain the efficient operation of the refrigeration system, and ensure that the refrigerator can quickly and stably provide cold capacity for each storage room. Compared with the fixed defrost cycle, the refrigeration efficiency is greatly improved. In addition, traditional refrigerators use a fixed defrost cycle, which may defrost when the evaporator is not seriously frosted, resulting in a waste of electricity. The solution can dynamically adjust the defrost cycle according to the actual user's use. By reasonably controlling the defrost frequency, the overall energy consumption of the refrigerator is reduced, helping users save electricity costs, and is also in line with the environmental protection concept of energy conservation and emission reduction.

[0043] In some embodiments of the present application, the method further includes:

[0044] When the refrigerator runs into the refrigeration recovery time period, acquiring a user behavior parameter detected within a certain time period before entering the refrigeration recovery time period, and determining a second standard value according to the user behavior parameter;

[0045] Calculate the second defrost cycle duration according to the second duration corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration;

[0046] The defrost cycle of the refrigerator is updated according to the duration of the second defrost cycle.

[0047] The above technical solution has the following advantages or beneficial effects: in the refrigeration recovery time period, the second standard value is determined by obtaining the user behavior parameters within a certain period of time before entering the time period, which can accurately judge the actual operating state of the refrigerator after experiencing frequent use stages such as catering. Different users have different subsequent usage frequencies and durations after using the refrigerator. This evaluation value enables the refrigerator to flexibly adjust the defrost cycle according to specific user behavior, ensuring that the defrost operation matches the actual frosting conditions inside the refrigerator, and achieving more precise operation control. In addition, the second defrost cycle duration is calculated based on the second standard value, the second duration corresponding to the refrigeration recovery time period, and the first defrost cycle duration, and the defrost cycle is updated accordingly, which can improve the calculation accuracy of the defrost cycle duration in the refrigeration recovery time period.

[0048] In some embodiments of the present application, the method further includes:

[0049] When the refrigerator is in a normal operation time period, the defrost cycle of the refrigerator is controlled to keep the second defrost cycle length unchanged.

[0050] The above technical solution has the following advantages or beneficial effects: During the normal operation period, the temperature inside the refrigerator is relatively stable, the frosting speed is also relatively stable, and the defrost cycle is kept constant at the second defrost cycle length, thus avoiding the equipment instability factor that may be caused by frequent adjustment of the defrost cycle. At the same time, since the second defrost cycle length is reasonably calculated based on the previous user behavior and operating status, it remains unchanged during this period, and a relatively energy-saving defrost frequency can be maintained, which not only ensures the normal operation of components such as the evaporator, but also avoids energy waste due to excessive defrosting, thus achieving a good balance between stable operation and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0052] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0053] Figure 3 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0054] Figure 4 is a connection diagram of a controller and its control components provided by an embodiment of the present invention;

[0055] Figure 5 is a first working flow diagram of a controller provided by an embodiment of the present invention;

[0056] Figure 6 is a second working flow diagram of the controller provided by an embodiment of the present invention;

[0057] Figure 7 is a third working flow diagram of the controller provided in an embodiment of the present invention;

[0058] Figure 8 is a fourth working flow diagram of the controller provided by an embodiment of the present invention;

[0059] Fig. 9 is a fifth working flow chart of the controller provided by an embodiment of the present invention;

[0060] Fig.10 The present invention is a flowchart of a refrigerator defrosting control method provided by an embodiment of the present invention.

[0061] Among them, 100, refrigerator; 10, touch screen; 20, controller; 30, memory; 40, temperature sensor; 401, refrigeration temperature sensor; 402, freezing temperature sensor; 50, damper; 60, fan; 111, refrigerator; 112, freezer; 101, compressor; 102, evaporator; 103, capillary; 104, condenser; 105, ambient humidity sensor; 106, ambient temperature sensor. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0064] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0065] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] See also Figure 1 , Figure 1It is a schematic diagram of the external structure of a refrigerator 100 provided by an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately rectangular in shape. The refrigerator includes a box body that defines a storage space and one or more door bodies arranged at the opening of the box body, wherein the door body includes a door body shell located outside the box body, a door body liner located inside the box body, an upper end cover, a lower end cover, and an insulation layer located between the door body shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulation layer is filled with foam. The box body is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a press cabin, etc., and also includes a storage space for storing food, etc.

[0067] See also Figure 2 , Figure 2 1 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into multiple storage rooms. The storage rooms can be configured as a refrigerating room 111 and a freezing room 112 according to different uses. They can also include a temperature-changing room, a vacuum drawer, a moisturizing drawer, etc. Each storage room corresponds to one or more door bodies, for example, Figure 2 The storage room at the upper part is provided with a double-opening door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to realize drawer-like storage.

[0068] See also Figure 3 , Figure 3The schematic diagram of the structure of the refrigeration system in the refrigerator 100 provided in the embodiment of the present invention, the refrigeration system includes a compressor 101, an evaporator 102, a drying filter (not shown in the figure), a capillary tube 103, a condenser 104 and a gas-liquid separator (not shown in the figure). The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. Among them, the compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 101 starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor 101, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 101 and then discharged into the condenser 104; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 104, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows ... The process is as follows: the condensed refrigerant saturated liquid is filtered through a drying filter to remove moisture and impurities and then flows into the capillary 103, through which it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 102, which not only reduces the temperature of the evaporator 102 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 102 passes through the gas-liquid separator and returns to the compressor 101 again, and the above process is repeated to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0069] See also Figure 4 , Figure 4 : is a connection diagram of a controller and its control components provided by an embodiment of the present invention, wherein the refrigerator 100 comprises:

[0070] A touch screen 10 is provided on one of the cabinet doors, and is used to display prompt information and receive touch operations of the user;

[0071] The controller 20 is disposed in the box and is used to receive detection data from the temperature sensor 40, the ambient humidity sensor 105 and the ambient temperature sensor 106, and to control the opening and closing of the damper 50, the fan 60 and the compressor 101;

[0072] The memory 30 is used to store the operating parameters of the refrigerator, such as the operating parameters including: the defrost temperature of the evaporator detected by the defrost sensor, the temperature of the storage chamber detected by the temperature sensor, the fan speed, the compressor speed, the defrost time, etc.;

[0073] The temperature sensor 40 includes a refrigeration temperature sensor 401 and a freezing temperature sensor 402. The refrigeration temperature sensor 401 is disposed in the refrigeration chamber to obtain the temperature of the refrigeration chamber, and the freezing temperature sensor 402 is disposed in the freezing chamber to obtain the temperature of the freezing chamber;

[0074] The air door 50 includes a refrigerating air door and a freezing air door. The refrigerating air door is arranged in an air duct connected to the refrigerating chamber. When the refrigerating air door is opened, the cold air in the air duct can smoothly enter the refrigerating chamber. When the refrigerating air door is closed, the cold air in the air duct cannot enter the refrigerating chamber. The freezing air door is arranged in an air duct connected to the freezing chamber. When the freezing air door is opened, the cold air in the air duct can smoothly enter the freezing chamber. When the freezing air door is closed, the cold air in the air duct cannot enter the freezing chamber.

[0075] The fan 60 is arranged in the air duct of the refrigerator, and is used to allow air to enter the evaporator for heat exchange and send the heat-released air into the refrigerator storage room;

[0076] The environmental humidity sensor 105 is provided outside the box and is used to detect the environmental humidity of the environment in which the refrigerator is located. After the environmental humidity is sent to the controller, the controller can adjust its operating parameters according to the environmental humidity;

[0077] The ambient temperature sensor 106 is disposed outside the box and is used to detect the ambient temperature of the environment in which the refrigerator is located. After sending the ambient temperature to the controller, the controller can adjust its operating parameters according to the ambient temperature.

[0078] Specifically, the controller of the refrigerator is configured to: when it is detected that the door of any storage room is opened in the current detection cycle, obtain the user behavior parameters of the door when it is opened; divide the current detection cycle into time periods according to the user behavior parameters; wherein the current detection cycle includes at least one user use time period, at least one refrigeration recovery time period and at least one normal operation time period; when the refrigerator is in the user use time period, obtain the user behavior parameters detected within a certain time period before entering the user use time period, and determine the first standard value according to the user behavior parameters; calculate the first defrost cycle duration according to the first time length corresponding to the user use time period, the first standard value and the initialization frost cycle duration; and update the defrost cycle of the refrigerator according to the first defrost cycle duration.

[0079] For example, see Figure 5 , Figure 5It is the first working flow chart of the controller provided in the embodiment of the present invention, and the controller is configured to execute steps S11 to S17. Since there are multiple doors of the storage room, especially the refrigerator divided into a cold storage room and a freezer room, no matter which door of the storage room is opened at this time, the user behavior parameters of this door need to be recorded. In the embodiment of the present invention, 24 hours a day is a detection cycle, that is, 0-24 hours a day is a detection cycle, and a detection cycle is divided into at least one user use time period, at least one refrigeration recovery time period and at least one normal operation time period. The user use time period indicates that the user needs to cook, and the refrigerator may be used frequently at this time. The refrigeration recovery time period follows the user use time period, indicating that the user does not need to use the refrigerator after finishing the meal, and the refrigerator can gradually return to the normal operation time period.

[0080] For example, the refrigerator is in normal operation and connected to the Internet. The key operating parameters of the refrigerator are confirmed. The refrigerator has no door opening operation. According to the ambient temperature range during normal operation, the initial defrost cycle is confirmed to be h hours. The minimum value of h is 10h, that is, h≥10 hours. When the refrigerator runs to the user use time period, the first defrost cycle duration of this time period needs to be synchronized with the first duration x of the user use time period, and the first defrost cycle duration H of the first user use time period is calculated. A1 The calculation process satisfies the following formula:

[0081] H A1 =hxT 1 / 60*20 (1);

[0082] Among them, T 1 is the first standard value within a certain period of time (such as 2 hours) before entering the user use time period, T 1 =N 1 / t 1 , N 1 is the number of door openings within a certain period of time before entering the user usage time period, t 1 It refers to the door opening time within a certain period of time before the user enters the usage time period.

[0083] In an embodiment of the present invention, a first standard value is determined according to a user behavior parameter, and then the first defrost cycle duration is calculated to update the evaporator defrost cycle, so that the defrost operation can be more in line with the actual usage conditions. During the user's use period, frequent opening of the door will lead to an increase in the amount of hot and humid air entering the evaporator, making it easier to frost. At this time, shortening the defrost cycle can remove the frost layer in time, ensure the heat exchange efficiency of the evaporator, maintain the efficient operation of the refrigeration system, and ensure that the refrigerator can quickly and stably provide cold air to each storage room. Compared with a fixed defrost cycle, the refrigeration efficiency is greatly improved. In addition, traditional refrigerators use a fixed defrost cycle, and may defrost when the evaporator is not seriously frosted, resulting in a waste of electricity. This solution can dynamically adjust the defrost cycle according to the actual user's use. By reasonably controlling the defrost frequency, the overall energy consumption of the refrigerator is reduced, helping users save electricity costs, and is also in line with the environmental protection concept of energy conservation and emission reduction.

[0084] Specifically, the current detection cycle is divided into time periods according to the user behavior parameters, including: when the user behavior parameters meet the preset user behavior conditions for the first time in the current detection cycle, determining that the refrigerator enters the first user use time period of the current detection cycle; obtaining a first duration corresponding to the first user use time period; determining a second duration corresponding to the refrigeration recovery time period according to the first duration, and determining a third duration of the normal operation time period according to the first duration and the second duration; determining the remaining user use time periods, refrigeration recovery time periods and normal operation time periods in the current detection cycle according to the first duration, the second duration and the third duration.

[0085] For example, see Figure 6 , Figure 6It is the second working flow chart of the controller provided by an embodiment of the present invention, and the step S13 is configured to execute steps S131 to S135. Within a detection cycle, if it is detected that the user behavior parameter meets the user behavior condition for the first time, it means that the user frequently uses the refrigerator at this time, and it is very likely that the user needs to cook, so it is determined that the refrigerator enters the first user use time period of the current detection cycle. When it is detected that the user behavior parameter meets the user behavior condition for the first time, for example, the user frequently opens the door of the refrigerator at 7:00 in the morning, and the user behavior parameter meets the user behavior condition for the first time, the duration of the user use time period is first determined, such as the duration is x, and the range of x is 60 to 240 minutes. The specific value of x can be determined in direct proportion according to the user behavior parameter. Since the time of first entering the user usage time period is 7:00 am, it can be determined that the user usage time period will appear three times in the current detection cycle, corresponding to breakfast, lunch and dinner, and the remaining two user usage time periods need to be determined. After knowing the length of the first user usage time period, the distribution of the refrigeration recovery time period and the normal operation time period in the current detection cycle can be further determined, and the current detection cycle can be fully divided into different time periods in advance. When the refrigerator enters these time periods, the operating parameters can be adjusted to adapt to the current time period.

[0086] It should be noted that in the current detection cycle, if the user behavior parameters do not meet the user behavior conditions, the refrigerator is assumed to be in the normal operation time period. If the user frequently opens the door of the refrigerator only at 11:00 am, and the user behavior parameters meet the user behavior conditions for the first time, then according to common sense, it can be determined that the user use time period will appear twice in the current detection cycle, corresponding to lunch and dinner. Therefore, it is also necessary to determine the remaining user use time period and the remaining refrigeration recovery time period and normal operation time period. In addition, if the other time periods of the entire detection cycle are divided after entering the user use time period for the first time, since the time periods have been pre-divided at this time, if the user behavior parameters are detected in the second user use time period to meet the user behavior conditions, then the time period division of the detection cycle remains unchanged at this time; if the user behavior parameters are detected in the refrigeration recovery time period or the normal operation time period to meet the user behavior conditions, then the time period division of the detection cycle needs to be updated at this time, such as updating the refrigeration recovery time period to the user use time period, and then re-dividing the subsequent time periods.

[0087] The embodiment of the present invention provides the following division method of the first duration, the second duration and the third duration:

[0088] For example, if the first duration x = 120 minutes, the approximate user usage time period distribution is as follows:

[0089] 1) Breakfast time period A1: 06:00-08:00;

[0090] 2) Lunch time period A2: 11:00-13:00;

[0091] 3) Dinner time period A3: 17:00-19:00;

[0092] Assuming that the second duration is recorded as y, and the range of y is 0-240 minutes, the second duration corresponding to the cooling recovery time period is determined according to the first duration, including: determining the user behavior evaluation value according to the user behavior parameter; calculating the second duration corresponding to the cooling recovery time period according to the first duration, the user behavior evaluation value and the preset second duration coefficient. That is, the calculation process of the second duration y satisfies the following formula:

[0093] y=K 1 *x+k 2 *T (2);

[0094] Where x is the first duration corresponding to the user's usage time period, in minutes; T is the initial user behavior evaluation value, in seconds, T = N * t, N is the number of door openings, t is the duration of a single door opening, in seconds; K 1 is the first duration coefficient, which can be preset, such as K 1 =0.8; K 2 is the second duration coefficient, which can be preset, such as K 2 =15.

[0095] The names of the cooling recovery time period records are recorded as B1, B2, and B3, and their corresponding second time lengths are as follows:

[0096] 1) y = 120, B1 = 120min, then the 2h after A1 / A2 / A3 is the cooling recovery time period.

[0097] 2) y=180, B2=180min, then the 3h after A1 / A2 / A3 is the cooling recovery time period.

[0098] 3) y=240, B3=240min, then the 4h after A1 / A2 / A3 is the cooling recovery time period.

[0099] If y=240, then in the above example, there are only 180 minutes after A1, which cannot satisfy y=240 minutes, so it is automatically converted to y=180 minutes.

[0100] After a single user usage time period and refrigeration recovery time period are completed, the duration before the next user usage time period is reached can be calculated as z, which is a number between 0 and 1440, in minutes. If it is 0, it may be that the refrigeration recovery time period is long, and the next user usage time period will be entered immediately after the refrigeration recovery time period; if it is 1440, it may be that the user has not opened the refrigerator door all day, and there is no need to divide the detection cycle at this time, and the refrigerator has been in the normal operation time period. After the user usage time period and refrigeration recovery time period are determined, the remaining time is divided into the normal operation time period.

[0101] In the embodiment of the present invention, different users use the refrigerator for different durations during the user use time period. By obtaining the first duration of the first user use time period to determine the subsequent time periods, the specific use habits of the user can be closely matched. Accurate time period division and duration determination enable the refrigerator to adopt targeted temperature control strategies at different stages. In addition, the second duration of the refrigeration recovery time period is reasonably determined to ensure that the temperature in the refrigerator can be promptly and stably restored to an appropriate level after the user use time period, thereby ensuring the freshness of food. At the same time, the third duration of the regular operation time period is determined based on the first duration and the second duration, thereby avoiding the refrigerator from over-operating in unnecessary situations and reducing energy consumption. In addition, the user behavior evaluation value is determined based on the user behavior parameter, and the specific situation of the user opening the refrigerator door is comprehensively considered, such as the number of door openings, the duration of each door opening, etc. These factors can reflect the frequency and use method of the user's use of the refrigerator during the user use time period. The second duration is calculated by combining the first duration, the user behavior evaluation value and the preset second duration coefficient, so that the determination of the refrigeration recovery time period can more accurately match the actual behavior of the user.

[0102] Specifically, the user behavior parameters are the door opening duration and the number of door openings. After obtaining the user behavior parameters when the door is opened, the controller is further configured to: when it is detected that the door opening duration is greater than a preset door opening duration threshold, determine that the user behavior parameters meet the preset user behavior conditions for the first time in the current detection cycle; or, when it is detected that the number of door openings within a set time period is greater than a preset door opening number threshold, determine that the user behavior parameters meet the preset user behavior conditions for the first time in the current detection cycle.

[0103] For example, the door opening time threshold is 2 minutes (or other values), the set time period is 1 hour (or other values), and the door opening times threshold is 5 times (or other values). If the user opens the door 10 times within 1 hour, or the single door opening time reaches more than 2 minutes, it is determined that the user behavior parameter meets the preset user behavior condition for the first time in the current detection cycle.

[0104] In the embodiment of the present invention, the door opening time and the number of door openings are used as key judgment parameters, which can more accurately capture the state of the user in the dining activity. When the door opening time is greater than the preset door opening time threshold, it means that the user may frequently take or store food for a long time, which is usually consistent with the preparation of meals or the dining process, so that the user can accurately determine the entry into the user use time period. Similarly, if the number of door openings within the set time period is greater than the preset door opening number threshold, it also indicates that the user frequently uses the refrigerator and is very likely to be in a dining-related activity. Such a judgment method improves the accuracy of identifying the user's use time period and provides a reliable basis for the subsequent reasonable operation control of the refrigerator. Different users have different habits of door opening time and door opening number when using the refrigerator. By setting the door opening time threshold and the door opening number threshold, and judging according to these two parameters, it can adapt to the use habits of different users. No matter what kind of use the user is, the user's use time period can be more accurately identified, so that the operation strategy of the refrigerator is more in line with the actual needs of the user and improves the user experience.

[0105] Specifically, the controller is also configured to: when the refrigerator runs to the refrigeration recovery time period, obtain user behavior parameters detected within a certain time period before entering the refrigeration recovery time period, and determine a second standard value based on the user behavior parameters; calculate the second defrost cycle duration based on the second time length corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration; and update the defrost cycle of the refrigerator according to the second defrost cycle duration.

[0106] For example, see Figure 7 , Figure 7 is a third working flow chart of the controller provided in an embodiment of the present invention. After executing step S14 and determining that the refrigerator is not in the user use time period, the controller is further configured to execute steps S21 to S24. The refrigerator runs to the refrigeration recovery time period, such as running to the refrigeration recovery time period B1. The second defrost cycle duration value is based on H A1 The second defrost cycle duration H of the first refrigeration recovery period B1 The calculation process satisfies the following formula:

[0107] H B1 =H A1 -yT 2 / 60*20 (3);

[0108] Among them, T 2 is the second standard value within a certain period of time (such as 2 hours) before entering the cooling recovery period, T 2 =N 2 / t 2 , N 2is the number of door openings within a certain period of time before entering the cooling recovery period; t 2 It is the door opening time within a certain period of time before entering the cooling recovery period.

[0109] In an embodiment of the present invention, during the refrigeration recovery time period, the second standard value is determined by obtaining the user behavior parameters within a certain period of time before entering the time period, so that the actual operating state of the refrigerator after frequent use such as catering can be accurately judged. After different users use the refrigerator, the subsequent frequency and duration of use are different. This evaluation value enables the refrigerator to flexibly adjust the defrost cycle according to the specific user behavior, ensuring that the defrost operation matches the actual frosting situation inside the refrigerator, and realizing more precise operation control. In addition, the second defrost cycle duration is calculated based on the second standard value, the second duration corresponding to the refrigeration recovery time period, and the first defrost cycle duration, and the defrost cycle is updated accordingly, which can improve the calculation accuracy of the defrost cycle duration in the refrigeration recovery time period.

[0110] Specifically, the controller is further configured to: when the refrigerator is in a normal operation time period, control the defrost cycle of the refrigerator to keep the second defrost cycle length unchanged.

[0111] For example, the refrigerator enters a normal operation time period, such as a normal operation time period C1. During normal operation, the defrost cycle duration H of the first normal operation time period is C1 The duration of the second defrost cycle is equal to the duration of the second defrost cycle in the refrigeration recovery period, that is, the duration of the defrost cycle is not adjusted at this time, satisfying H C1 =H B1 When the clock runs to the user's time period A2, H is calculated in the same way. A2 , H B2 , H C2 ; and calculate H A3 , H B3 , H C3 .

[0112] In the embodiment of the present invention, during the normal operation period, the temperature inside the refrigerator is relatively stable, the frosting speed is also relatively stable, and the defrost cycle is kept unchanged at the second defrost cycle length, thereby avoiding the equipment instability factor that may be caused by frequent adjustment of the defrost cycle. At the same time, since the second defrost cycle length is reasonably calculated based on the previous user behavior and operating status, it remains unchanged during this period, and a relatively energy-saving defrost frequency can be maintained, which not only ensures the normal operation of components such as the evaporator, but also avoids energy waste due to excessive defrosting, thus achieving a good balance between stable operation and energy saving.

[0113] Specifically, after calculating the first defrost cycle duration according to the first duration corresponding to the user usage time period, the first standard value and the initialization frost cycle, the controller is also configured: when the first defrost cycle duration is less than the preset minimum defrost cycle duration, the shortest defrost cycle duration is used as the first defrost cycle duration.

[0114] For example, see Figure 8 , Figure 8 This is the fourth working flow diagram of the controller provided by the embodiment of the present invention. After executing step S16, the controller is further configured to execute steps S161 to S163. If the shortest defrost cycle duration is 10 hours, if the calculated first defrost cycle duration is less than this value, it is executed as 10 hours.

[0115] In the embodiment of the present invention, the shortest defrost cycle duration is set and the first defrost cycle duration is adjusted when it is less than the value, ensuring that the defrost operation has enough time to complete. If the defrost cycle is too short, the frost on the evaporator may not be completely melted, resulting in accumulation of frost layer, affecting the heat exchange efficiency of the evaporator, and further affecting the normal operation of the refrigeration system. By taking the shortest defrost cycle duration as the first defrost cycle duration, it is ensured that the defrost process can be fully carried out, the normal working state of the evaporator is maintained, and the stable operation of the refrigerator refrigeration system is guaranteed.

[0116] Specifically, after calculating the second defrost cycle duration according to the second duration corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration, the controller is also configured: when the second defrost cycle duration is less than the preset minimum defrost cycle duration, the shortest defrost cycle duration is used as the second defrost cycle duration.

[0117] For example, see Fig. 9 , Fig. 9 This is the fifth working flow diagram of the controller provided by the embodiment of the present invention. After executing step S23, the controller is further configured to execute steps S231 to S233. If the shortest defrost cycle duration is 10 hours, if the calculated second defrost cycle duration is less than this value, it is executed as 10 hours.

[0118] In the embodiment of the present invention, the shortest defrost cycle duration is set and the second defrost cycle duration is adjusted when it is less than the value, ensuring that the defrost operation has enough time to complete. If the defrost cycle is too short, the frost on the evaporator may not be completely melted, resulting in accumulation of frost layer, affecting the heat exchange efficiency of the evaporator, and further affecting the normal operation of the refrigeration system. By taking the shortest defrost cycle duration as the second defrost cycle duration, it is ensured that the defrost process can be fully carried out, the normal working state of the evaporator is maintained, and the stable operation of the refrigerator refrigeration system is guaranteed.

[0119] Specifically, the initialization frost cycle duration is the defrost cycle duration last updated in the previous detection cycle; or, the initialization frost cycle duration is a preset fixed defrost cycle duration.

[0120] In the embodiment of the present invention, the defrost cycle duration last updated in the previous detection cycle is used as the initialization defrost cycle duration, so that the refrigerator can continue the previous reasonable defrost mode at the beginning of a new detection cycle. Since the defrost cycle of the previous cycle is determined based on the user behavior at that time, the operating status of the refrigerator and other factors, this continuity helps to maintain the stability of the temperature inside the refrigerator and avoid temperature fluctuations caused by sudden changes in the defrost cycle, thereby better ensuring the preservation of food. Using a preset fixed defrost cycle duration as the initialization defrost cycle duration greatly simplifies the logic of the refrigerator control system. For some scenarios where user behavior is relatively stable and the requirements for refrigerator intelligence are not particularly high, the fixed defrost cycle can meet basic usage requirements while reducing the calculation amount and complexity of the system.

[0121] See also Fig.10 , Fig.10 1 is a flow chart of a refrigerator defrost control method provided by an embodiment of the present invention. The refrigerator defrost control method is implemented by a controller in the refrigerator. The refrigerator control method includes:

[0122] S1. When it is detected that a door of any storage compartment of the refrigerator is opened in the current detection cycle, a user behavior parameter of the door when the door is opened is obtained;

[0123] S2. Divide the current detection cycle into time periods according to the user behavior parameters; wherein the current detection cycle includes at least one user use time period, at least one cooling recovery time period and at least one normal operation time period;

[0124] S3. when the refrigerator is in a user use time period, obtaining a user behavior parameter detected within a certain time period before entering the user use time period, and determining a first standard value according to the user behavior parameter;

[0125] S4, calculating the first defrost cycle duration according to the first duration corresponding to the user usage time period, the first standard value and the initialization defrost cycle duration;

[0126] S5. Update the defrost cycle of the refrigerator according to the duration of the first defrost cycle.

[0127] Specifically, the method also includes: when the refrigerator runs to the refrigeration recovery time period, obtaining user behavior parameters detected within a certain time period before entering the refrigeration recovery time period, and determining a second standard value based on the user behavior parameters; calculating the second defrost cycle duration based on the second time length corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration; and updating the defrost cycle of the refrigerator according to the second defrost cycle duration.

[0128] Specifically, the method further includes: when the refrigerator is in a normal operation time period, controlling the defrost cycle of the refrigerator to keep the second defrost cycle length unchanged.

[0129] Specifically, after calculating the first defrost cycle duration according to the first duration corresponding to the user usage time period, the first standard value and the initialization frost cycle, the method also includes: when the first defrost cycle duration is less than the preset minimum defrost cycle duration, the shortest defrost cycle duration is used as the first defrost cycle duration.

[0130] Specifically, after calculating the second defrost cycle duration according to the second duration corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration, the method also includes: when the second defrost cycle duration is less than the preset minimum defrost cycle duration, the shortest defrost cycle duration is used as the second defrost cycle duration.

[0131] Specifically, the initialization frost cycle duration is the defrost cycle duration last updated in the previous detection cycle; or, the initialization frost cycle duration is a preset fixed defrost cycle duration.

[0132] Specifically, dividing the current detection cycle into time periods according to the user behavior parameters includes: when the user behavior parameters meet the preset user behavior conditions for the first time in the current detection cycle, determining that the refrigerator enters the first user use time period of the current detection cycle; obtaining a first duration corresponding to the first user use time period; determining a second duration corresponding to the refrigeration recovery time period according to the first duration, and determining a third duration of the normal operation time period according to the first duration and the second duration; determining the remaining user use time periods, refrigeration recovery time periods and normal operation time periods in the current detection cycle according to the first duration, the second duration and the third duration.

[0133] It is worth noting that the working process of the defrost control method for a refrigerator described in the embodiment of the present invention can refer to the working process diagram of the controller in the refrigerator described in the above embodiment, which will not be repeated here.

[0134] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber and a freezing chamber; A refrigeration system, used to provide coldness for the refrigerator, the refrigeration system comprising a compressor, a condenser and an evaporator connected by pipelines; Controller, the controller is configured as: When it is detected that the door of any storage room is opened in the current detection cycle, the user behavior parameters when the door is opened are obtained; Dividing the current detection cycle into time periods according to the user behavior parameter; wherein the current detection cycle includes at least one user use time period, at least one cooling recovery time period and at least one normal operation time period; When the refrigerator is in a user use time period, obtaining a user behavior parameter detected within a certain time period before entering the user use time period, and determining a first standard value according to the user behavior parameter; Calculate the first defrost cycle duration according to the first duration corresponding to the user usage time period, the first standard value and the initialization defrost cycle duration; The defrost cycle of the refrigerator is updated according to the duration of the first defrost cycle.

2. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the refrigerator runs into the refrigeration recovery time period, acquiring a user behavior parameter detected within a certain time period before entering the refrigeration recovery time period, and determining a second standard value according to the user behavior parameter; Calculate the second defrost cycle duration according to the second duration corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration; The defrost cycle of the refrigerator is updated according to the duration of the second defrost cycle.

3. The refrigerator according to claim 2, characterized in that: The controller is also configured to: When the refrigerator is in a normal operation time period, the defrost cycle of the refrigerator is controlled to keep the second defrost cycle length unchanged.

4. The refrigerator according to claim 1, characterized in that: After calculating the first defrost cycle duration according to the first duration corresponding to the user usage time period, the first standard value and the initialization frost cycle, the controller is further configured to: When the first defrost cycle duration is shorter than a preset shortest defrost cycle duration, the shortest defrost cycle duration is used as the first defrost cycle duration.

5. The refrigerator according to claim 2 or 3, characterized in that: After calculating the second defrost cycle duration according to the second duration corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration, the controller is further configured as follows: When the second defrost cycle duration is shorter than a preset shortest defrost cycle duration, the shortest defrost cycle duration is used as the second defrost cycle duration.

6. The refrigerator according to claim 1, characterized in that: The initialization frost cycle duration is the defrost cycle duration last updated in the previous detection cycle; or, the initialization frost cycle duration is a preset fixed defrost cycle duration.

7. The refrigerator according to claim 1, characterized in that: The dividing the current detection cycle into time periods according to the user behavior parameters includes: When the user behavior parameter meets the preset user behavior condition for the first time in the current detection cycle, it is determined that the refrigerator enters the first user use time period of the current detection cycle; Obtaining a first duration corresponding to the first user usage time period; Determine a second duration corresponding to the cooling recovery time period according to the first duration, and determine a third duration of the normal operation time period according to the first duration and the second duration; The remaining user use time period, cooling recovery time period and normal operation time period in the current detection cycle are determined according to the first time period, the second time period and the third time period.

8. A defrosting control method for a refrigerator, characterized in that: include: When it is detected that a door of any storage compartment of the refrigerator is opened in the current detection cycle, a user behavior parameter of the door when it is opened is obtained; Dividing the current detection cycle into time periods according to the user behavior parameter; wherein the current detection cycle includes at least one user use time period, at least one cooling recovery time period and at least one normal operation time period; When the refrigerator is in a user use time period, obtaining a user behavior parameter detected within a certain time period before entering the user use time period, and determining a first standard value according to the user behavior parameter; Calculate the first defrost cycle duration according to the first duration corresponding to the user usage time period, the first standard value and the initialization defrost cycle duration; The defrost cycle of the refrigerator is updated according to the duration of the first defrost cycle.

9. The defrosting control method for a refrigerator according to claim 8, characterized in that: The method further comprises: When the refrigerator runs into the refrigeration recovery time period, acquiring a user behavior parameter detected within a certain time period before entering the refrigeration recovery time period, and determining a second standard value according to the user behavior parameter; Calculate the second defrost cycle duration according to the second duration corresponding to the refrigeration recovery time period, the second standard value and the first defrost cycle duration; The defrost cycle of the refrigerator is updated according to the duration of the second defrost cycle.

10. The defrosting control method for a refrigerator according to claim 9, characterized in that: The method further comprises: When the refrigerator is in a normal operation time period, the defrost cycle of the refrigerator is controlled to keep the second defrost cycle length unchanged.

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