Refrigerator and air door heater control method thereof

Abstract

The invention discloses a refrigerator and an air door heater control method thereof, which are used for detecting and analyzing opening parameters of a refrigerator door, accurately judging user behaviors, reasonably dividing operation time periods of the refrigerator and adjusting the starting and stopping proportion of an air door heater in different time periods. Due to the fact that the operation time periods of the refrigerator are accurately divided according to the actual using behaviors of the user, the influence of air door frosting on the performance of the refrigerator can be effectively avoided, the refrigerating efficiency is improved, energy utilization is optimized, and the requirements of the user for food preservation and diversified storage are better met.

Description

Technical Field

[0001] The present invention relates to the field of refrigerators, and particularly to a refrigerator and a control method for an air damper heater thereof. Background Art

[0002] In modern family life, as an indispensable household appliance, the refrigerator undertakes the important functions of food preservation and storage. With the improvement of people's living standards and the continuous enhancement of the requirements for the quality of life, higher requirements are also put forward for the performance and intelligence level of the refrigerator. In daily use, the frequency and duration of the user opening the refrigerator door have great uncertainties. When the user frequently opens the refrigerator door to take or store food, this will cause significant changes in the temperature and humidity inside the refrigerator, which in turn affects the frosting condition at the air damper. Frosting at the air damper will cause the air damper to jam, affecting the normal delivery of cold air, and even causing problems such as air duct blockage, while existing refrigerators do not consider the problem of frosting at the air damper. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a refrigerator and a control method for an air damper heater thereof, which add an air damper heater at the air damper of the refrigerator, can heat the air damper in time to avoid frosting at the air damper, and ensure the normal delivery of cold air.

[0004] To achieve the above purpose, the embodiments of the present invention provide a refrigerator, including:

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

[0006] A refrigeration system for providing cooling capacity for the refrigerator, and the refrigeration system includes a compressor, a condenser and an evaporator connected by pipelines;

[0007] An air damper, including a refrigerating air damper and a freezing air damper, the refrigerating air damper is arranged in the air duct communicated with the refrigerating chamber for controlling the amount of cold air sent into the refrigerating chamber; the freezing air damper is arranged in the air duct communicated with the freezing chamber for controlling the amount of cold air sent into the freezing chamber;

[0008] An air damper heater, including a first air damper heater arranged at the refrigerating air damper and a second air damper heater arranged at the freezing air damper, the first air damper heater is used for heating and defrosting the refrigerating air damper, and the second air damper heater is used for heating and defrosting the freezing air damper;

[0009] A controller, and the controller is configured to:

[0010] When it is detected that the door of the target storage chamber is opened in the current detection period, obtain the door opening parameters when the door is opened;

[0011] Divide the current detection period according to the described door opening parameters; wherein, the current detection period includes a dining period, a recovery period, and a normal operation period;

[0012] Determine the target air door heater corresponding to the target storage room;

[0013] Adjust the on-off ratio of the target air door heater according to different time periods when the refrigerator is in operation.

[0014] The above technical solution has the following advantages or beneficial effects: Adding an air door heater at the air door of the refrigerator can heat the air door in time to avoid frosting of the air door, ensuring the normal delivery of cold air. In addition, by setting independent air door heaters for the refrigerating air door and the freezing air door respectively, it is possible to heat and defrost the refrigerating air door and the freezing air door separately according to their frosting conditions. Compared with the unified defrosting method, it is more accurate and effective, avoiding unnecessary energy waste, improving the defrosting efficiency, and ensuring the normal operation of the air door and the smooth delivery of cold air. The controller divides the current detection period according to the door opening parameters and adjusts the on-off ratio of the target air door heater in different time periods. This intelligent control method enables the air door heater to work reasonably in different usage scenarios.

[0015] In some embodiments of the present application, the refrigerator further includes:

[0016] A first temperature sensor, disposed on one side of the refrigerating air door, for obtaining a first temperature value;

[0017] The controller is further configured to:

[0018] Obtain a first temperature value once when the first air door heater is started, and obtain a first temperature value once after an interval of a first set time;

[0019] Calculate a first temperature change value between two consecutive first temperature values obtained;

[0020] When the first temperature change value is less than a first temperature threshold, issue a first prompt message.

[0021] The above technical solution has the following advantages or beneficial effects: By setting a first temperature sensor on one side of the refrigerating air door, the temperature value at the refrigerating air door can be obtained accurately and in real time. This accurate judgment method can timely detect the problem that the refrigerating air door cannot defrost, avoiding affecting the normal operation and energy consumption of the refrigerator due to incomplete defrosting or over-defrosting.

[0022] In some embodiments of the present application, the refrigerator further includes:

[0023] A second temperature sensor, disposed on one side of the freezing air door, for obtaining a second temperature value;

[0024] The controller is further configured to:

[0025] When the second air damper heater is started, obtain a second temperature value once, and obtain a second temperature value once after an interval of a second set time;

[0026] Calculate the second temperature change value between the second temperature values obtained continuously twice;

[0027] When the second temperature change value is less than the second temperature threshold, send out a second prompt message.

[0028] The above technical solution has the following advantages or beneficial effects: By setting a second temperature sensor on one side of the freezing air damper, the temperature value at the freezing air damper can be obtained accurately in real time. This precise judgment method can timely detect the problem that the freezing air damper cannot defrost, and avoid affecting the normal operation and energy consumption of the refrigerator due to incomplete defrosting or excessive defrosting.

[0029] In some embodiments of the present application, the adjusting the on-off ratio of the target air damper heater according to different time periods in which the refrigerator is located includes:

[0030] When the refrigerator is in the dining time period, calculate the first on-off ratio according to the first duration corresponding to the dining time period and the initial on-off ratio, and control the target air damper heater to operate according to the first on-off ratio;

[0031] When the refrigerator is in the recovery time period, calculate the second on-off ratio according to the second duration corresponding to the recovery time period and the first on-off ratio, and control the target air damper heater to operate according to the second on-off ratio;

[0032] When the refrigerator is in the normal operation time period, control the target air damper heater to operate according to the initial on-off ratio.

[0033] The above technical solution has the following advantages or beneficial effects: The controller adjusts the on-off ratio of the target air damper heater according to different time periods. This intelligent control method enables the air damper heater to work reasonably in different usage scenarios. This technical solution enables the refrigerator to automatically adjust the on-off ratio of the target air damper heater according to different time periods in which it is located, realizing the intelligent operation of the refrigerator. Without manual setting or intervention by the user, the refrigerator can intelligently adjust according to the usage situation, providing a more convenient and comfortable usage experience.

[0034] In some embodiments of the present application, the door opening parameters include the door opening duration and the number of door openings.

[0035] The above technical solution has the following advantages or beneficial effects: The door opening duration and the number of door openings, as the door opening parameters of the refrigerator door, provide a richer and more accurate basis for dividing the time periods of the current detection cycle. Based on these two parameters, the controller can more accurately determine the usage scenario of the refrigerator, and then reasonably divide the dining time period, the recovery time period, and the normal operation time period, so that the subsequent adjustment of the on-off ratio of the target air damper heater is more in line with the actual needs.

[0036] In some embodiments of the present application, calculating the first on-off ratio according to the first duration corresponding to the dining time period and the initial on-off ratio includes: obtaining the door opening duration and the number of door openings detected within a certain time period before entering the dining time period, and calculating a first target value according to the door opening duration and the number of door openings; calculating the first on-off ratio according to the first duration corresponding to the dining time period, the initial on-off ratio, and the first target value.

[0037] The above technical solution has the following advantages or beneficial effects: By obtaining the door opening duration and the number of door openings within a certain time period before entering the dining time period to calculate the first target value, it can more accurately reflect the usage habits of users in this specific scenario. There are differences in the usage frequency and duration of the refrigerator by different users during the dining time period. Some users may open the door frequently and for a long time to take and place ingredients, while some users do so relatively less. Calculating the first on-off ratio based on this evaluation value enables the operating mode of the refrigerator to accurately adapt to the behaviors of different users and better meet the actual needs of users. In addition, calculating the first on-off ratio based on the first target value, the first duration corresponding to the dining time period, and the initial on-off ratio can achieve dynamic optimization of the operating state of the target air damper heater.

[0038] In some embodiments of the present application, calculating the second on-off ratio according to the second duration corresponding to the recovery time period and the first on-off ratio includes:

[0039] Obtaining the door opening duration and the number of door openings detected within a certain time period before entering the recovery time period, and calculating a second target value according to the door opening duration and the number of door openings;

[0040] Calculating the second on-off ratio according to the second duration corresponding to the recovery time period, the first initial on-off ratio, and the second target value. The above technical solution has the following advantages or beneficial effects: During the recovery time period, by obtaining the door opening duration and the number of door openings within a certain time before entering this time period to calculate the second target value, it can more accurately judge the operation habits of users after just finishing frequent use. Calculating the second on-off ratio based on this evaluation value can make the operating mode of the refrigerator more in line with the actual behavior of users and timely adjust the working state of the target air damper heater.

[0041] Better adapt to the recovery process of the internal temperature of the refrigerator.

[0042] In some embodiments of the present application, the division of the current detection period according to the door opening parameter of the box door includes:

[0043] When the door opening parameter of the box door first meets the preset user behavior condition in the current detection period, it is determined that the refrigerator enters the first dining time period of the current detection period;

[0044] Obtain the first duration corresponding to the first dining time period;

[0045] Determine the second duration corresponding to the recovery time period according to the first duration, and determine the third duration of the normal operation time period according to the first duration and the second duration;

[0046] Determine the remaining dining time period, recovery time period and normal operation time period in the current detection period according to the first duration, the second duration and the third duration.

[0047] The above technical solution has the following advantages or beneficial effects: There are differences in the usage duration of different users using the refrigerator during the dining time period. By obtaining the first duration of the first dining time period to determine each subsequent time period, it can closely fit the specific usage habits of users. Accurate time period division and duration determination enable the refrigerator to adopt targeted temperature control strategies at different stages. In addition, reasonably determining the second duration of the recovery time period can ensure that the temperature inside the refrigerator can be restored to an appropriate level in a timely and stable manner after the dining time period, ensuring the freshness preservation effect of food. At the same time, determining the third duration of the normal operation time period based on the first duration and the second duration avoids excessive operation of the refrigerator under unnecessary circumstances and reduces energy consumption.

[0048] To achieve the above object, an embodiment of the present invention further provides a control method for a damper heater of a refrigerator. The refrigerator includes a damper and a damper heater. The damper includes a refrigerating damper and a freezing damper. The damper heater includes a first damper heater provided on the refrigerating damper and a second damper heater provided on the freezing damper. The method includes:

[0049] When it is detected that the box door of the target storage compartment is opened in the current detection period, obtain the door opening parameter of the box door when it is opened;

[0050] Divide the current detection period according to the door opening parameter; wherein, the current detection period includes a dining time period, a recovery time period and a normal operation time period;

[0051] Determine the target damper heater corresponding to the target storage compartment;

[0052] Adjust the on-off ratio of the target air door heater according to different time periods when the refrigerator is in operation.

[0053] The above technical solution has the following advantages or beneficial effects: By adding an air door heater at the air door of the refrigerator, the air door can be heated in time to avoid frosting, ensuring the normal delivery of cold air. In addition, by setting independent air door heaters for the refrigerating air door and the freezing air door respectively, defrosting can be carried out separately according to the frosting conditions of the refrigerating air door and the freezing air door. Compared with the unified defrosting method, it is more accurate and effective, avoiding unnecessary energy waste, improving the defrosting efficiency, and ensuring the normal operation of the air door and the smooth delivery of cold air. The controller divides the current detection period into time periods according to the door opening parameters and adjusts the on-off ratio of the target air door heater in different time periods. This intelligent control method enables the air door heater to work reasonably in different usage scenarios.

[0054] In some embodiments of the present application, the adjusting the on-off ratio of the target air door heater according to different time periods when the refrigerator is in operation includes:

[0055] When the refrigerator is in the dining time period, calculate the first on-off ratio according to the first duration corresponding to the dining time period and the initial on-off ratio, and control the target air door heater to operate according to the first on-off ratio;

[0056] When the refrigerator is in the recovery time period, calculate the second on-off ratio according to the second duration corresponding to the recovery time period and the first on-off ratio, and control the target air door heater to operate according to the second on-off ratio;

[0057] When the refrigerator is in the normal operation time period, control the target air door heater to operate according to the initial on-off ratio.

[0058] The above technical solution has the following advantages or beneficial effects: The controller adjusts the on-off ratio of the target air door heater according to different time periods. This intelligent control method enables the air door heater to work reasonably in different usage scenarios. This technical solution enables the refrigerator to automatically adjust the on-off ratio of the target air door heater according to different time periods it is in, realizing the intelligent operation of the refrigerator. Without manual setting or intervention by the user, the refrigerator can intelligently adjust according to the usage situation, providing a more convenient and comfortable user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0060] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0061] Figure 3 It is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0062] Figure 4 It is a schematic connection diagram of a controller and its control components provided by an embodiment of the present invention;

[0063] Figure 5 It is a schematic position diagram of an air door and an air door heater provided by an embodiment of the present invention;

[0064] Figure 6 It is the first working flowchart of a controller provided by an embodiment of the present invention;

[0065] Figure 7 It is the second working flowchart of a controller provided by an embodiment of the present invention;

[0066] Figure 8 It is the third working flowchart of a controller provided by an embodiment of the present invention;

[0067] Figure 9 It is the fourth working flowchart of a controller provided by an embodiment of the present invention;

[0068] Figure 10 It is the fifth working flowchart of a controller provided by an embodiment of the present invention;

[0069] Figure 11 It is a flowchart of a method for controlling an air door heater of a refrigerator provided by an embodiment of the present invention.

[0070] Among them, 100, refrigerator; 10, touch screen; 20, controller; 30, memory; 40, temperature sensor; 401, refrigerating chamber temperature sensor; 402, freezing chamber temperature sensor; 50, air door; 51, refrigerating chamber air door; 52, freezing chamber air door;; 60, air door heater; 61, first heater; 62, second heater; 111, refrigerating chamber; 112, freezing chamber; 101, compressor; 102, evaporator; 103, capillary tube; 104, condenser; 105, ambient humidity sensor; 106, ambient temperature sensor. Detailed implementation manners

[0071] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0072] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0073] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0074] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0075] See Figure 1 , Figure 1 is a schematic external structure diagram of a refrigerator 100 provided by an embodiment of the present invention. The refrigerator 100 of this embodiment has an approximate cuboid shape. The refrigerator includes a box body defining a storage space and one or more door bodies provided at the opening of the box body. Among them, the door body includes a door body outer shell located outside the box body, a door body inner liner located inside the box body, an upper end cover, a lower end cover, and a heat insulation layer located between the door body outer shell, the door body inner liner, the upper end cover, and the lower end cover; generally, the heat insulation layer is filled with foaming material. The box body is provided with a chamber, and the chamber includes a component storage chamber for placing components in the refrigerator, such as a compressor compartment, etc., and also includes a storage space for storing food, etc.

[0076] See Figure 2 , Figure 2 is a schematic internal structure diagram of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into a plurality of storage compartments. According to different uses, the storage compartments can be configured as a refrigerating compartment 111 and a freezing compartment 112, and can also include a variable temperature compartment, a vacuum drawer, a humidity-preserving drawer, etc. Each storage compartment corresponds to one or more door bodies. For example, in Figure 2The 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.

[0077] See also Figure 3 , Figure 3 The 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.

[0078] 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:

[0079] 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;

[0080] 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 damper heater 60, the fan 70 and the compressor 101;

[0081] A memory 30 for storing the operating parameters of the refrigerator, such as the defrosting temperature of the evaporator detected by a defrosting sensor, the temperature of the storage compartment detected by a temperature sensor, the fan speed, the compressor speed, the defrosting time, etc.;

[0082] A temperature sensor 40, including a refrigerating temperature sensor 401 and a freezing temperature sensor 402. The refrigerating temperature sensor 401 is disposed in the refrigerating compartment for obtaining the temperature of the refrigerating compartment, and the freezing temperature sensor 402 is disposed in the freezing compartment for obtaining the temperature of the freezing compartment;

[0083] A damper 50, see Figure 5 , Figure 5 is a schematic diagram of the positions of the damper and the damper heater provided by an embodiment of the present invention. The damper 50 includes a refrigerating damper 51 and a freezing damper 52. The refrigerating damper 51 is disposed in the air duct communicating with the refrigerating compartment. When the refrigerating damper 51 is opened, the cold air in the air duct can smoothly enter the refrigerating compartment 111. When the refrigerating damper 51 is closed, the cold air in the air duct cannot enter the refrigerating compartment 111. The freezing damper 52 is disposed in the air duct communicating with the freezing compartment 112. When the freezing damper 52 is opened, the cold air in the air duct can smoothly enter the freezing compartment 112. When the freezing damper 52 is closed, the cold air in the air duct cannot enter the freezing compartment 112;

[0084] A damper heater 60, including a first heater 61 disposed on one side of the refrigerating damper 51 and a second heater 62 disposed on one side of the freezing damper 52. The first damper heater 61 is used to heat and defrost the refrigerating damper 51, and the second damper heater 62 is used to heat and defrost the freezing damper 52. After the compressor works for a period of time (about 8 - 10 hours), the refrigerating damper 51 and the freezing damper 52 may also frost. If defrosting is not performed, the frost will become thicker and thicker, causing the refrigerating damper 51 and the freezing damper 52 to not rotate (unable to close or open), affecting the air supply to the refrigerating / freezing compartment. After the first heater 61 and the second heater 62 are turned on, the frost layer can be melted in time.

[0085] An ambient humidity sensor 105 is disposed outside the cabinet for detecting the ambient humidity of the environment where the refrigerator is located. After sending this ambient humidity to the controller, the controller can adjust its operating parameters according to the ambient humidity;

[0086] An ambient temperature sensor 106 is disposed outside the cabinet for detecting the ambient temperature of the environment where the refrigerator is located. After sending this ambient temperature to the controller, the controller can adjust its operating parameters according to the ambient temperature.

[0087] Specifically, the controller of the refrigerator is configured to: when it is detected that the door of the target storage compartment is opened in the current detection cycle, obtain the door opening parameters of the door when it is opened; divide the current detection cycle into time periods according to the door opening parameters; wherein, the current detection cycle includes a dining time period, a recovery time period, and a normal operation time period; determine the target air damper heater corresponding to the target storage compartment; adjust the on-off ratio of the target air damper heater according to different time periods when the refrigerator is in operation.

[0088] Exemplarily, referring to Figure 6 , Figure 6 FIG. 1 is the first working flowchart of the controller provided by the embodiment of the present invention, and the controller is configured to execute steps S11 to S15. Since there are multiple doors for the storage compartments, especially for a refrigerator with a divided refrigerating compartment and a freezing compartment, no matter which storage compartment door is opened at this time, the door opening parameters of this door need to be recorded. In the embodiment of the present invention, a 24-hour day is used as a detection cycle, that is, a detection cycle is from 0 to 24 hours every day. A detection cycle is divided into at least one dining time period, at least one recovery time period, and at least one normal operation time period. The dining time period means that the user needs to cook, and the refrigerator may be frequently used at this time. The recovery time period follows the dining time period, indicating that after the user finishes eating, the refrigerator is no longer needed, and the refrigerator can gradually return to the normal operation time period.

[0089] Exemplarily, after dividing the time periods of a detection cycle, when it is detected that the refrigerator runs to this time period, adjust the on-off ratio of the air damper heater in this time period according to the time period it is in. In addition, since the refrigerator has two air dampers and two air damper heaters, if the door opening parameters of the refrigerating compartment are detected at this time, and the detection cycle is divided into time periods according to the door opening parameters of the refrigerating compartment, then this divided time period is for the first air damper heater, and the calculated on-off ratio is also for the first air damper heater, that is, the on-off ratio control between the first air damper heater and the second air damper heater is independent of each other. If the door opening parameters of the freezing compartment are not detected all the time, it means that the user has not opened the door of the freezing compartment. At this time, the second air damper heater can operate according to the initially set on-off ratio, such as the initial on-off ratio is 10% (opened for 10 minutes within 100 minutes).

[0090] In the embodiment of the present invention, a damper heater is added at the damper of the refrigerator, which can heat the damper in time to avoid frosting of the damper, ensure the normal delivery of cold air. In addition, by setting independent damper heaters for the refrigerating damper and the freezing damper, heating defrosting can be carried out separately according to the frosting conditions of the refrigerating damper and the freezing damper. Compared with the unified defrosting method, it is more accurate and effective, avoids unnecessary energy waste, improves the defrosting efficiency, and ensures the normal operation of the damper and the smooth delivery of cold air. The controller divides the current detection period into time periods according to the door opening parameters of the refrigerator door, and adjusts the on-off ratio of the target damper heater in different time periods. This intelligent control method enables the damper heater to work reasonably in different usage scenarios.

[0091] Specifically, the dividing the current detection period into time periods according to the door opening parameters includes: when the door opening parameters first meet the preset user behavior conditions in the current detection period, it is determined that the refrigerator enters the first dining time period of the current detection period; obtaining the first duration corresponding to the first dining time period; determining the second duration corresponding to the recovery time period according to the first duration, and determining the third duration of the normal operation time period according to the first duration and the second duration; determining the remaining dining time periods, the recovery time period and the normal operation time period in the current detection period according to the first duration, the second duration and the third duration.

[0092] Exemplarily, referring to Figure 7 , Figure 7 FIG. is the second working flow chart of the controller provided by the embodiment of the present invention, and the step S13 is configured to execute steps S131 to S135. In a detection period, if it is detected that the door opening parameters first meet the user behavior conditions, 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 dining time period of the current detection period. When it is detected that the door opening parameters first meet the user behavior conditions, for example, the user frequently opens the door of the refrigerating chamber at 7:00 in the morning, and at this time the door opening parameters first meet the user behavior conditions, then first determine the duration of the dining time period, such as the duration is x, and the range of x is 60-240 min. The specific value of x can be determined according to the door opening parameters and is in a direct proportional relationship. Since the time when the first dining time period is entered is 7:00 in the morning, it can be determined that the dining time period will appear three times in the current detection period, corresponding to breakfast, lunch and dinner. It is also necessary to determine the remaining two dining time periods. After knowing the duration of the first dining time period, the distribution of the recovery time period and the normal operation time period in the current detection period can be further determined, and then the current detection period can be pre-completely divided into different time periods. When the refrigerator enters these time periods, the operating parameters can be adjusted to adapt to the current time period.

[0093] It should be noted that in the current detection cycle, if the door opening parameter does not meet the user behavior condition all the time, it is defaulted that the refrigerator is in the normal operation time period. If the user frequently opens the door of the refrigerating chamber at 11:00 in the morning and the door opening parameter first meets the user behavior condition, then according to common sense, it can be determined that there will be two dining time periods in the current detection cycle, corresponding to lunch and dinner. Therefore, it is also necessary to determine the remaining one dining time period, the remaining recovery time period and the normal operation time period. In addition, if other time periods of the entire detection cycle are divided after the first entry into the dining time period, since the time periods have been pre-divided at this time, if the door opening parameter is detected to meet the user behavior condition in the second dining time period, the time period division of the detection cycle remains unchanged at this time; if the door opening parameter is detected to meet the user behavior condition in the recovery time period or the normal operation time period, the time period division of the detection cycle needs to be updated at this time, such as updating the recovery time period to the dining time period, and then re-dividing the subsequent time periods.

[0094] The embodiments of the present invention provide the following division methods for the first duration, the second duration and the third duration:

[0095] For example, if the first duration x = 120 min, the approximate distribution of the dining time periods is as follows:

[0096] 1) Breakfast time period A1: 06:00 - 08:00;

[0097] 2) Lunch time period A2: 11:00 - 13:00;

[0098] 3) Dinner time period A3: 17:00 - 19:00;

[0099] Assume that the second duration is denoted as y, and the range of y is 0 - 240 min. Determining the second duration corresponding to the recovery time period according to the first duration includes: determining the user behavior evaluation value according to the door opening parameter; calculating the second duration corresponding to the recovery time period according to the first duration, the user behavior evaluation value and a preset second duration coefficient. That is, the calculation process of the second duration y satisfies the following formula:

[0100] y = K1 * x + k2 * T (1);

[0101] where x is the first duration corresponding to the dining 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; K1 is the first duration coefficient, which can be preset, such as K1 = 0.8; K2 is the second duration coefficient, which can be preset, such as K2 = 15.

[0102] Restore the names of the time period records, denoted as B1, B2, B3, and their corresponding second durations are, for example:

[0103] 1) y = 120, B1 = 120 min, then the 2 hours after A1 / A2 / A3 is the restoration time period.

[0104] 2) y = 180, B2 = 180 min, then the 3 hours after A1 / A2 / A3 is the restoration time period.

[0105] 3) y = 240, B3 = 240 min, then the 4 hours after A1 / A2 / A3 is the restoration time period.

[0106] If y = 240, then after A1 in the above example, there is only 180 min, which cannot meet y = 240 min, so it is automatically converted to y = 180 min.

[0107] After a single dining time period and restoration time period are completed, before reaching the next dining time period, the continuous time can be calculated as z, where z is a number between 0 and 1440, and the unit is minutes. If it is 0, it may be that the restoration time period is relatively long, and at this time, the next dining time period will start immediately after the restoration time period; if it is 1440, it may be that the user has not opened the refrigerator door all day, and at this time, there is no need to divide the detection cycle, and the refrigerator has been in the normal operation time period. After the dining time period and the restoration time period are determined, the remaining time is divided into the normal operation time period.

[0108] In the embodiments of the present invention, there are differences in the durations of different users using the refrigerator during the dining time period. By obtaining the first duration of the first dining time period to determine subsequent time periods, it can closely fit the specific usage habits of users. Accurate time period division and duration determination enable the refrigerator to adopt targeted temperature control strategies at different stages. In addition, reasonably determining the second duration of the restoration time period can ensure that the temperature inside the refrigerator can be restored to an appropriate level in a timely and stable manner after the dining time period, guaranteeing the fresh-keeping effect of food. At the same time, determining the third duration of the normal operation time period based on the first duration and the second duration avoids the refrigerator from running excessively under unnecessary circumstances and reduces energy consumption. In addition, determining the user behavior evaluation value based on the refrigerator door opening parameters comprehensively considers the specific situations of the user opening the refrigerator door, such as the number of door openings and the duration of each door opening. These factors can reflect the frequency and usage method of the user using the refrigerator during the dining time period. Combining the first duration, the user behavior evaluation value, and the preset second duration coefficient to calculate the second duration makes the determination of the restoration time period more accurately match the actual behavior of the user.

[0109] Specifically, the door opening parameter is the door opening duration or the number of door openings. After obtaining the door opening parameter of the box door when it 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 door opening parameter first meets the preset user behavior condition 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 number of door openings threshold, determine that the door opening parameter first meets the preset user behavior condition in the current detection cycle.

[0110] Exemplarily, the door opening duration threshold is 2 min (or other value), the set time period is 1 h (or other value), and the number of door openings threshold is 5 times (or other value). If the user opens the door 10 times within 1 h, or the single door opening time reaches more than 2 min, it is determined that the door opening parameter first meets the preset user behavior condition in the current detection cycle.

[0111] In the embodiment of the present invention, using the door opening duration or the number of door openings as the key determination parameter can more accurately capture the state of the user being in a dining activity. When the door opening duration is greater than the preset door opening duration threshold, it indicates that the user may frequently take or store food within a relatively long time, which usually conforms to the process of preparing meals or dining, so that the dining time period can be accurately determined. Similarly, when the number of door openings within the set time period is greater than the preset number of door openings threshold, it also indicates that the user frequently uses the refrigerator and is very likely to be in a dining-related activity. Such a determination method improves the accuracy of identifying the dining time period and provides a reliable basis for the subsequent reasonable operation control of the refrigerator. When different users use the refrigerator, there are differences in the habits of door opening duration and the number of door openings. By setting the door opening duration threshold and the number of door openings threshold and making a determination based on these two parameters, it can adapt to the usage habits of different users. No matter which usage method the user adopts, the dining time period can be more accurately identified, making the operation strategy of the refrigerator more in line with the actual needs of the user and improving the user experience.

[0112] Specifically, refer to Figure 8 , Figure 8It is the third working flowchart of the controller provided by the embodiment of the present invention. The step S15 is configured to execute steps S151 to S153. Adjusting the on-off ratio of the target air door heater according to different time periods when the refrigerator is in includes: when the refrigerator is in the dining time period, calculating the first on-off ratio according to the first duration corresponding to the dining time period and the initial on-off ratio, and controlling the target air door heater to operate according to the first on-off ratio; when the refrigerator is in the recovery time period, calculating the second on-off ratio according to the second duration corresponding to the recovery time period and the first on-off ratio, and controlling the target air door heater to operate according to the second on-off ratio; when the refrigerator is in the normal operation time period, controlling the target air door heater to operate according to the initial on-off ratio.

[0113] Exemplarily, during the dining time period, the refrigerator door is usually opened frequently, and a large amount of external hot air enters the refrigerator, resulting in large temperature fluctuations in the refrigerating chamber and the freezing chamber. At this time, calculating the first on-off ratio according to the first duration corresponding to the dining time period and the initial on-off ratio, and increasing the opening time of the target air door heater can defrost the air door in time, ensure the smooth delivery of cold air, effectively cope with the influence brought by frequent door opening and closing, and avoid the refrigerator running at a high load for a long time due to the influence of air door frosting on the refrigeration effect. Thus, energy can be reasonably utilized in this special scenario, and unnecessary energy consumption waste can be reduced. During the recovery time period, calculating the second on-off ratio according to the second duration and the first on-off ratio, and appropriately adjusting the on-off situation of the target air door heater. This helps to accelerate the temperature of the refrigerating chamber and the freezing chamber to return to the normal level after the refrigerator door is closed, stabilize the internal environment of the refrigerator as soon as possible, provide good storage temperature conditions for food, ensure the freshness preservation effect of food, and reduce the influence of temperature fluctuations on food quality. During the normal operation time period, controlling the target air door heater to operate according to the initial on-off ratio. At this time, the internal temperature of the refrigerator is relatively stable, and excessive defrosting operations are not required. This stable operation mode can not only ensure the normal operation of the air door, prevent frosting from affecting refrigeration, but also avoid the heater from overworking, thereby reducing the long-term energy consumption of the refrigerator, extending the service life of the equipment, and reducing the electricity cost of users.

[0114] In the embodiment of the present invention, the controller adjusts the on-off ratio of the target air door heater according to different time periods. This intelligent control method enables the air door heater to work reasonably in different usage scenarios. This technical solution enables the refrigerator to automatically adjust the on-off ratio of the target air door heater according to different time periods it is in, realizing the intelligent operation of the refrigerator. Without manual setting or intervention by the user, the refrigerator can intelligently adjust according to the usage situation, providing a more convenient and comfortable usage experience.

[0115] Specifically, the refrigerator door opening parameters include the door opening duration and the number of door openings.

[0116] Exemplarily, the door opening duration and the number of door openings, as the door opening parameters of the refrigerator door, provide a richer and more accurate basis for dividing the time periods of the current detection cycle. Based on these two parameters, the controller can more accurately determine the usage scenario of the refrigerator, and then reasonably divide the dining time period, the recovery time period, and the normal operation time period, making the subsequent adjustment of the on-off ratio of the target air damper heater more in line with the actual needs.

[0117] Specifically, in step S151, the calculating the first on-off ratio according to the first duration corresponding to the dining time period and the initial on-off ratio includes: obtaining the door opening duration and the number of door openings detected within a certain time period before entering the dining time period, and calculating a first target value according to the door opening duration and the number of door openings; calculating the first on-off ratio according to the first duration corresponding to the dining time period, the initial on-off ratio, and the first target value.

[0118] Exemplarily, the refrigerator is in a normal operation state and is connected to the network, and the key operating parameters of the refrigerator are confirmed. There is no door opening operation for the refrigerator, and the initial on-off ratio of the air damper heater is confirmed as e according to the ambient temperature section during normal operation. For example, the initial value of e is 10%, and the maximum value of e is 100%. When the refrigerator runs to the dining time period, the first on-off ratio of this time period needs to synchronize the first duration x of the A1 dining time period to calculate the first on-off ratio E of the first dining time period. A1 The calculation process satisfies the following formula:

[0119] E A1 = e + x / E a + T1 / 6000 (2);

[0120] Wherein, E a is the first on-off coefficient, which can be set in advance. For example, E a = 200. T1 is the first target value within a certain time period (such as 2h) before entering the dining time period, T1 = N1 / t1, N1 is the number of door openings within a certain time period before entering the dining time period, and t1 is the door opening duration within a certain time period before entering the dining time period. It should be noted that the maximum on-off ratio of the air damper heater is 100%. When the value increases and exceeds 100%, it is executed according to 100%.

[0121] Specifically, in step S152, the calculating the second on-off ratio according to the second duration corresponding to the recovery time period and the first on-off ratio includes: obtaining the door opening duration and the number of door openings detected within a certain time period before entering the recovery time period, and calculating a second target value according to the door opening duration and the number of door openings; calculating the second on-off ratio according to the second duration corresponding to the recovery time period, the first initial on-off ratio, and the second target value.

[0122] Exemplarily, when the refrigerator runs to the recovery time period, the recovery time period is B1. The value of its second on-off ratio is recalculated according to the value of E A1 . The calculation process of the second on-off ratio E B1 of the first recovery time period satisfies the following formula:

[0123] E B1 = E A1 - y / E b - T2 / 6000 (3);

[0124] Wherein, E b is the second on-off coefficient, which can be preset, such as E b = 200. T2 is the second target value within a certain time period (such as 2h) before entering the recovery time period, T2 = N2 / t2, N2 is the number of door openings within a certain time period before entering the recovery time period; t2 is the door opening duration within a certain time period before entering the recovery time period.

[0125] Specifically, in step S153, the refrigerator enters the normal operation time period C1. During normal operation, the on-off ratio E B1 of the first normal operation time period is restored to the initial on-off ratio, that is, E B1 = e. When the clock runs to the dining time period A2, in the same way, calculate E A2 , E B2 , E C2 ; and calculate E A3 , E B3 , E C3 .

[0126] In the embodiments of the present invention, by obtaining the door opening duration and the number of door openings within a certain period before entering the dining time period to calculate the first target value, it can more accurately reflect the user's usage habits in this specific scenario. There are differences in the usage frequency and duration of the refrigerator by different users during the dining time period. Some users may frequently open the door for a long time to take and place ingredients, while some users do so relatively less. Calculating the first on-off ratio based on this evaluation value enables the operation mode of the refrigerator to precisely adapt to the behaviors of different users and better meet the actual needs of users. In addition, calculating the first on-off ratio based on the first target value, the first duration corresponding to the dining time period, and the initial on-off ratio can achieve dynamic optimization of the operating state of the target air damper heater. For example, if the user frequently opens the door for a long time before the dining time period, it indicates that the temperature in the refrigerator may fluctuate greatly during this period. At this time, the calculated first on-off ratio will appropriately increase the opening time of the heater to defrost in a timely manner to ensure cold air supply and avoid excessive refrigeration of the refrigerator due to unstable temperature, consuming more energy; conversely, if the user's door opening behavior is less, the opening time of the heater is appropriately reduced to lower energy consumption, so as to effectively save energy in different user behavior modes. In addition, during the recovery time period, by obtaining the door opening duration and the number of door openings within a certain time before entering this time period to calculate the second target value, it can more accurately judge the user's operation habits after just finishing frequent use. Calculating the second on-off ratio based on this evaluation value can make the operation mode of the refrigerator more in line with the actual behavior of the user, timely adjust the working state of the target air damper heater, and better adapt to the recovery process of the temperature inside the refrigerator.

[0127] Specifically, the refrigerator further includes:

[0128] A first temperature sensor, disposed on one side of the refrigerating air damper, for obtaining a first temperature value;

[0129] The controller is further configured to: when the first air damper heater is started, obtain a first temperature value once, and obtain a first temperature value once after an interval of the first set time; calculate a first temperature change value between two consecutive first temperature values obtained; when the first temperature change value is less than a first temperature threshold, send a first prompt message.

[0130] Exemplarily, referring to Figure 9 , Figure 9 is the fourth working flow chart of the controller provided by the embodiments of the present invention. The controller is configured to execute steps S21 to S25. After the first air damper heater is started, obtain the temperature value at a set time interval (such as 1 min) and calculate the temperature change value. When the change value is less than the first temperature threshold (such as 3 °C), it indicates that the defrosting process of the refrigerating air damper may be abnormal (such as a failure of the first air damper heater), and thus a first prompt message is sent to timely inform the user.

[0131] In the embodiments of the present invention, by arranging a first temperature sensor on one side of the refrigerating air door, the temperature value at the refrigerating air door can be obtained accurately in real time. This precise judgment method can timely detect the problem that the refrigerating air door cannot defrost, and avoid affecting the normal operation and energy consumption of the refrigerator due to incomplete defrosting or excessive defrosting.

[0132] In some embodiments of the present application, the refrigerator further includes:

[0133] A second temperature sensor, arranged on one side of the freezing air door, for obtaining a second temperature value;

[0134] The controller is further configured to: obtain a second temperature value once when the second air door heater is started, and obtain a second temperature value once after an interval of a second set time; calculate a second temperature change value between the second temperature values obtained continuously twice; when the second temperature change value is less than a second temperature threshold, send out a second prompt message.

[0135] Exemplarily, referring to Figure 10 , Figure 10 is the fifth working flow chart of the controller provided by the embodiments of the present invention. The controller is configured to execute steps S31 to S35. After the second air door heater is started, obtain the temperature value at a set time interval (such as 1 min) and calculate the temperature change value. When the change value is less than the second temperature threshold (such as 4 °C), it indicates that the defrosting process of the freezing air door may be abnormal (such as a failure of the second air door heater), and thus a second prompt message is sent out to inform the user in time.

[0136] In the embodiments of the present invention, by arranging a second temperature sensor on one side of the freezing air door, the temperature value at the freezing air door can be obtained accurately in real time. This precise judgment method can timely detect the problem that the freezing air door cannot defrost, and avoid affecting the normal operation and energy consumption of the refrigerator due to incomplete defrosting or excessive defrosting.

[0137] Referring to Figure 11 , Figure 11 is the flow chart of a method for controlling an air door heater of a refrigerator provided by the embodiments of the present invention. The method for controlling the air door heater of the refrigerator is implemented by a controller in the refrigerator. The refrigerator includes an air door and an air door heater. The air door includes a refrigerating air door and a freezing air door. The air door heater includes a first air door heater arranged on the refrigerating air door and a second air door heater arranged on the freezing air door. The method includes:

[0138] S1. When it is detected that the door of the target storage compartment is opened in the current detection cycle, obtain the door opening parameter when the door is opened;

[0139] S2. Divide the current detection period according to the door opening parameters of the box door; wherein, the current detection period includes a dining period, a recovery period, and a normal operation period;

[0140] S3. Determine the target air door heater corresponding to the target storage room;

[0141] S4. Adjust the on-off ratio of the target air door heater according to different time periods when the refrigerator is in.

[0142] Specifically, the method further includes: when the first air door heater is started, obtain the first temperature value of the refrigerating air door once, and obtain the first temperature value once after an interval of the first set time; calculate the first temperature change value between the first temperature values obtained continuously twice; when the first temperature change value is less than the first temperature threshold, send out the first prompt message.

[0143] Specifically, the method further includes: when the second air door heater is started, obtain the second temperature value of the freezing air door once, and obtain the second temperature value once after an interval of the second set time; calculate the second temperature change value between the second temperature values obtained continuously twice; when the second temperature change value is less than the second temperature threshold, send out the second prompt message.

[0144] Specifically, the adjusting the on-off ratio of the target air door heater according to different time periods when the refrigerator is in includes: when the refrigerator is in the dining period, calculate the first on-off ratio according to the first duration corresponding to the dining period and the initial on-off ratio, and control the target air door heater to operate according to the first on-off ratio; when the refrigerator is in the recovery period, calculate the second on-off ratio according to the second duration corresponding to the recovery period and the first on-off ratio, and control the target air door heater to operate according to the second on-off ratio; when the refrigerator is in the normal operation period, control the target air door heater to operate according to the initial on-off ratio.

[0145] Specifically, the door opening parameters of the box door include the door opening duration and the number of door openings.

[0146] Specifically, the calculating the first on-off ratio according to the first duration corresponding to the dining period and the initial on-off ratio includes: obtaining the door opening duration and the number of door openings detected within a certain time period before entering the dining period, and calculating the first target value according to the door opening duration and the number of door openings; calculating the first on-off ratio according to the first duration corresponding to the dining period, the initial on-off ratio, and the first target value.

[0147] Specifically, calculating the second opening and stopping ratio according to the second duration corresponding to the recovery time period and the first opening and stopping ratio includes: obtaining the opening duration and the number of door openings detected within a certain time period before entering the recovery time period, and calculating a second target value according to the opening duration and the number of door openings; calculating the second opening and stopping ratio according to the second duration corresponding to the recovery time period, the first opening and stopping ratio, and the second target value.

[0148] Specifically, dividing the current detection cycle into time periods according to the door opening parameter of the refrigerator includes: when the door opening parameter first meets a preset user behavior condition in the current detection cycle, determining that the refrigerator enters the first dining time period of the current detection cycle; obtaining a first duration corresponding to the first dining time period; determining a second duration corresponding to the 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 dining time period, the recovery time period, and the normal operation time period in the current detection cycle according to the first duration, the second duration, and the third duration.

[0149] It should be noted that the working process of the air door heater control method of the refrigerator according to the embodiment of the present invention can refer to the working flowchart of the controller in the refrigerator described in the above embodiment, and will not be elaborated here.

[0150] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope 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; The air door includes a refrigeration air door and a freezing air door. The refrigeration air door is arranged in the air duct connected to the refrigeration chamber, and is used to control the amount of cold air sent into the refrigeration chamber; the freezing air door is arranged in the air duct connected to the freezing chamber, and is used to control the amount of cold air sent into the freezing chamber; The damper heater comprises a first damper heater provided at the refrigerating damper and a second damper heater provided at the freezing damper, wherein the first damper heater is used for heating and defrosting the refrigerating damper, and the second damper heater is used for heating and defrosting the freezing damper; Controller, the controller is configured as: When detecting that the door of the target storage room is opened in the current detection cycle, obtaining the door opening parameters of the door when it is opened; Divide the current detection cycle into time periods according to the door opening parameters; determining a target damper heater corresponding to the target storage chamber; The on / off ratio of the target air door heater is adjusted according to the different time periods of the refrigerator.

2. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises: A first temperature sensor, disposed on one side of the refrigeration damper, for obtaining a first temperature value; The controller is also configured to: When the first damper heater is started, a first temperature value is obtained once, and the first temperature value is obtained once after a first set time interval; Calculating a first temperature change value between two consecutively acquired first temperature values; When the first temperature change value is less than a first temperature threshold, a first prompt message is issued.

3. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises: A second temperature sensor is provided on one side of the freezing damper and is used to obtain a second temperature value; The controller is also configured to: When the second air door heater is started, obtaining a second temperature value once, and obtaining a second temperature value once after a second set time interval; Calculating a second temperature change value between two consecutively acquired second temperature values; When the second temperature change value is less than a second temperature threshold, a second prompt message is issued.

4. The refrigerator according to claim 1, characterized in that: The current detection cycle includes a dining time period, a recovery time period, and a normal operating time period; and adjusting the on / off ratio of the target air door heater according to the different time periods of the refrigerator includes: When the refrigerator is in the dining time period, a first on / off ratio is calculated according to a first duration corresponding to the dining time period and an initial on / off ratio, and the target air door heater is controlled to operate according to the first on / off ratio; When the refrigerator is in a recovery time period, a second on / off ratio is calculated according to a second duration corresponding to the recovery time period and the first on / off ratio, and the target air door heater is controlled to operate according to the second on / off ratio; When the refrigerator is in a normal operation period, the target air door heater is controlled to operate according to the initial on / off ratio.

5. The refrigerator according to claim 4, characterized in that: The door opening parameters include the door opening time and the door opening times.

6. The refrigerator according to claim 5, characterized in that: The calculating the first start-stop ratio according to the first duration corresponding to the dining time period and the initial start-stop ratio includes: Obtaining the door opening time length and the number of door openings detected within a certain time period before entering the dining time period, and calculating a first target value according to the door opening time length and the number of door openings; A first start-stop ratio is calculated according to a first duration corresponding to the dining time period, the initial start-stop ratio and the first target value.

7. The refrigerator according to claim 5, characterized in that: The calculating the second on-off ratio according to the second duration corresponding to the recovery time period and the first on-off ratio includes: Obtaining the door opening time length and the number of door openings detected within a certain time period before entering the recovery time period, and calculating a second target value according to the door opening time length and the number of door openings; The second start-stop ratio is calculated according to the second time length corresponding to the recovery time period, the first start-stop ratio and the second target value.

8. The refrigerator according to claim 1, characterized in that The dividing the current detection cycle into time periods according to the door opening parameters includes: When the door opening 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 dining time period of the current detection cycle; Obtain a first duration corresponding to the first dining time period; Determine a second duration corresponding to the 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 dining time period, 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.

9. A method for controlling a refrigerator air door heater, characterized in that: The refrigerator comprises a damper and a damper heater, wherein the damper comprises a refrigerating damper and a freezing damper, wherein the damper heater comprises a first damper heater provided at the refrigerating damper and a second damper heater provided at the freezing damper, and the method comprises: When detecting that the door of the target storage room is opened in the current detection cycle, obtaining the door opening parameters of the door when it is opened; Divide the current detection cycle into time periods according to the door opening parameters; wherein the current detection cycle includes a dining time period, a recovery time period and a normal operation time period; determining a target damper heater corresponding to the target storage chamber; The on / off ratio of the target air door heater is adjusted according to the different time periods of the refrigerator.

10. The refrigerator door heater control method according to claim 1, characterized in that: The adjusting the on / off ratio of the target air door heater according to different time periods of the refrigerator includes: When the refrigerator is in the dining time period, a first on / off ratio is calculated according to a first duration corresponding to the dining time period and an initial on / off ratio, and the target air door heater is controlled to operate according to the first on / off ratio; When the refrigerator is in a recovery time period, a second on / off ratio is calculated according to a second duration corresponding to the recovery time period and the first on / off ratio, and the target air door heater is controlled to operate according to the second on / off ratio; When the refrigerator is in a normal operation period, the target air door heater is controlled to operate according to the initial on / off ratio.

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