Refrigerator and control method of refrigerator

Abstract

The invention discloses a refrigerator and a control method of the refrigerator, the refrigerator comprises a refrigerator body, a refrigerating system and a controller, and the refrigerator body is at least provided with a refrigerating chamber and a freezing chamber; the refrigerating system comprises a compressor, a fan, a condenser, a refrigerating chamber heat exchange subsystem and a freezing chamber heat exchange subsystem, the controller is connected with the refrigerating system, and the controller is configured to obtain refrigerator state data and send the refrigerator state data to the refrigerating chamber when the refrigerator state data meets the fault condition that a refrigerating chamber door is not tightly closed. And the operation frequency of the compressor and / or the rotating speed of the fan are / is increased in the refrigerating stage of the freezing chamber. According to the refrigerator, under the condition that the refrigerating chamber door is not tightly closed, the freezing chamber obtains more sufficient refrigerating capacity, the situation that the refrigerating performance of the freezing chamber is affected by cold leakage of the refrigerating chamber is avoided, and the problem that food materials go bad due to insufficient refrigeration of the freezing chamber is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and more particularly to a refrigerator and a control method thereof. Background Art

[0002] During the use of a refrigerator by a user, various problems often occur due to improper human operation, which affects the refrigeration effect and energy efficiency of the refrigerator. For example, if the refrigerating chamber is not completely sealed, continuous leakage of cold air will occur, resulting in an increase in the temperature of the freezing chamber, affecting the freshness preservation effect of the food in the freezing chamber, and at the same time increasing energy consumption. Therefore, in view of the problems of the decline in the refrigeration performance of the refrigerator and the increase in energy consumption caused by improper human operation, solutions need to be provided. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, an object of the present invention is to provide a refrigerator that can maintain the temperature control of the refrigerating chamber and enable the freezing chamber to obtain more sufficient refrigerating capacity when the door of the refrigerating chamber is not tightly closed, avoiding the influence of cold air leakage from the refrigerating chamber on the refrigeration performance of the freezing chamber, and at the same time being able to reduce the increase in energy consumption, thereby ensuring the overall refrigeration effect of the refrigerator and effectively preventing the problem of food deterioration caused by insufficient refrigeration in the freezing chamber.

[0004] To achieve the above object, the refrigerator according to an embodiment of the present invention includes: A cabinet, the cabinet is at least configured with a refrigerating chamber and a freezing chamber; A refrigeration system, the refrigeration system includes a compressor, a blower, a condenser, a refrigerating chamber heat exchange subsystem, and a freezing chamber heat exchange subsystem. The input ports of the refrigerating chamber heat exchange subsystem and the freezing chamber heat exchange subsystem are respectively connected to the output port of the condenser, and the input port of the condenser is connected to the exhaust port of the compressor; A controller, the controller is connected to the refrigeration system, and the controller is configured to: obtain refrigerator status data, and when the refrigerator status data meets the fault condition that the door of the refrigerating chamber is not tightly closed, increase the operating frequency of the compressor and / or increase the rotational speed of the blower during the refrigeration stage of the freezing chamber.

[0005] According to the refrigerator of the embodiment of the present invention, the refrigerator state data is obtained through the controller. When the refrigerator state data meets the fault condition of the refrigerator door of the refrigerating chamber not being closed tightly, the controller can increase the operating frequency of the compressor and / or increase the rotational speed of the blower during the refrigeration stage of the freezing chamber, thereby improving the refrigeration performance of the freezing chamber. Specifically, since there is no situation where the door of the freezing chamber is not closed tightly, therefore, high-frequency refrigeration and / or increasing the rotational speed of the blower can enable the freezing chamber to reach the set low temperature state faster, shortening the refrigeration time of the freezing chamber. And because the temperature of the freezing chamber rises slowly, the refrigeration effect of the freezing chamber can last longer, which provides more idle time for the compressor after the refrigeration of the freezing chamber is completed and can be used for the refrigeration of the refrigerating chamber to maintain the temperature stability of the refrigerating chamber as much as possible. Therefore, the refrigerator of the present invention realizes that when the door of the refrigerating chamber is not closed tightly, it can not only maintain the temperature control of the refrigerating chamber, but also enable the freezing chamber to obtain more sufficient refrigeration capacity, ensuring the temperature stability of the refrigerating chamber and the freezing chamber. At the same time, it also reduces the increase in energy consumption caused by the long-term high-frequency operation of the compressor, thereby ensuring the overall refrigeration performance of the refrigerator and effectively preventing the problem of food deterioration caused by insufficient refrigeration of the freezing chamber.

[0006] In some embodiments, the controller is configured to control the compressor to operate at a first preset frequency during the refrigeration stage of the freezing chamber when the refrigerator state data meets the fault condition of the refrigerator door of the refrigerating chamber not being closed tightly, wherein the compressor is provided with a first preset frequency and a second preset frequency corresponding to the same ambient temperature, and the first preset frequency is higher than the second preset frequency.

[0007] The above technical solution has the following advantages or beneficial effects: When the refrigerator state data meets the fault condition of the refrigerator door of the refrigerating chamber not being closed tightly, by selecting to control the compressor to operate at a higher first preset frequency during the refrigeration stage of the freezing chamber, it realizes that when the door of the refrigerating chamber is not closed tightly, it can not only maintain the temperature control of the refrigerating chamber, but also enable the freezing chamber to obtain more sufficient refrigeration capacity, avoiding the influence of cold leakage in the refrigerating chamber on the refrigeration performance of the freezing chamber.

[0008] In some embodiments, the controller is further configured to: when the refrigerator state data meets the fault condition of the refrigerator door of the freezing chamber not being closed tightly, control the compressor to operate at the first preset frequency and / or increase the rotational speed of the blower during the refrigeration stage of the freezing chamber.

[0009] The above technical solution has the following advantages or beneficial effects: When the refrigerator state data meets the fault condition of the refrigerator door of the freezing chamber not being closed tightly, by selecting to control the compressor to operate at the first preset frequency and / or increase the rotational speed of the blower during the refrigeration stage of the freezing chamber, it can maximize the offset of the temperature rise caused by the cold loss.

[0010] In some embodiments, the controller is further configured to: when the duration for which the temperature of the freezer compartment reaches the target temperature reaches a first preset duration, adjust the operating frequency of the compressor according to the startup rate of the compressor.

[0011] The above technical solution has the following advantages or beneficial effects: By setting a waiting time of a first preset duration when the temperature of the freezer compartment reaches the target temperature, it helps to reduce unnecessary frequency adjustments caused by short-term temperature fluctuations, thereby improving the stability and efficiency of the system.

[0012] In some embodiments, the controller is configured to: when the startup rate of the compressor is less than a preset startup rate threshold, control the compressor to operate at the second preset frequency.

[0013] The above technical solution has the following advantages or beneficial effects: When the startup rate of the compressor is less than a preset startup rate threshold, by controlling the compressor to operate at the second preset frequency, the frequency of the compressor can be reduced when the temperature of the freezer compartment is stable, thereby reducing the operating load of the compressor and extending its service life.

[0014] In some embodiments, the controller is further configured to: when the refrigerator status data meets the fault condition of putting hot objects into the refrigerating compartment, if the refrigerator meets the defrosting condition, start delaying a second preset duration from the time when it is determined that the refrigeration time of the refrigerator meets the defrosting condition, and then trigger the defrosting program.

[0015] The above technical solution has the following advantages or beneficial effects: When the refrigerator status data meets the fault condition of putting hot objects into the refrigerating compartment, if the refrigerator meets the defrosting condition, start a second preset duration from the time when it is determined that the refrigeration time of the refrigerator meets the defrosting condition and then trigger the defrosting program. This strategy can ensure that the refrigerator continues to refrigerate effectively when needed, and avoid further increase in the temperature of the refrigerating compartment due to immediate triggering of defrosting, protecting the safety and freshness of the internal food.

[0016] In some embodiments, the controller is further configured to: when the duration from the time when it is determined that the refrigeration time of the refrigerator meets the defrosting condition reaches the second preset duration, if the temperature of the refrigerating compartment is within the normal refrigerating temperature range and the refrigerator still meets the defrosting condition, control the refrigerator to execute the defrosting program.

[0017] The above technical solution has the following advantages or beneficial effects: By determining that after reaching the second preset duration, the temperature of the refrigerating compartment is within the normal refrigerating temperature range, it can ensure the safe storage of food. This is to prevent the temperature from being too high during the defrosting program and affecting the freshness of the ingredients inside the refrigerator.

[0018] In some embodiments, the controller is further configured to: within a third preset duration, if the number of times the refrigerator status data meets the fault condition for putting hot objects in the refrigerating chamber reaches a threshold number of times, when the refrigerator meets the defrosting condition again, control the refrigerator to directly execute the defrosting program, where the third preset duration is greater than the second preset duration.

[0019] The above technical solution has the following advantages or beneficial effects: By setting the third preset duration and the threshold number of times, it can ensure that the refrigerator can defrost normally when necessary, and reduce the decrease in refrigeration efficiency caused by frost blockage.

[0020] In some embodiments, the cabinet is further configured with a variable-temperature chamber; The refrigeration system further includes a variable-temperature chamber heat exchange subsystem for heat exchange of the variable-temperature chamber; the input port of the variable-temperature chamber heat exchange subsystem, the input port of the refrigerating chamber heat exchange subsystem, and the input port of the freezing chamber heat exchange subsystem are respectively connected to the output port of the condenser, and the output port of the variable-temperature chamber heat exchange subsystem and the output port of the refrigerating chamber heat exchange subsystem are refluxed and then input to the freezing chamber heat exchange subsystem, and the output port of the freezing chamber heat exchange subsystem is connected to the suction port of the compressor through a liquid accumulator.

[0021] The above technical solution has the following advantages or beneficial effects: By designing the connection of the variable-temperature chamber heat exchange subsystem with the refrigerating chamber heat exchange subsystem and the freezing chamber heat exchange subsystem, it can ensure that the refrigerant can be effectively distributed to each heat exchange subsystem after condensation in the condenser, and ensure that each space (variable-temperature chamber, refrigerating chamber, freezing chamber) can obtain the required cooling effect.

[0022] In some embodiments, the controller is further configured to: determine the fault type of the user usage fault satisfied by the refrigerator status data through a bad fault diagnosis model, where the bad fault diagnosis model takes the refrigerator status data as input and the fault type as output, and the fault type includes at least one of the faults of the refrigerating chamber door not being closed tightly, the freezing chamber door not being closed tightly, and putting hot objects in the refrigerating chamber.

[0023] The above technical solution has the following advantages or beneficial effects: By adopting a bad fault diagnosis model, it can process newly input data in real time, and can quickly analyze the data and obtain the fault type.

[0024] In some embodiments, the controller is further configured to: when the refrigerator status data reaches a preset data volume, perform the fault type diagnosis through the bad fault diagnosis model.

[0025] The above technical solution has the following advantages or beneficial effects: By requiring the data volume to reach a certain threshold before diagnosis, it effectively prevents the system from frequently triggering diagnoses in a short period of time, reducing unnecessary calculations and resource consumption. At the same time, the accumulation of data volume also helps to improve the accuracy of fault diagnosis.

[0026] In some embodiments, the controller is further configured to: when the refrigerator status data meets the conditions of any one of the faults of the refrigerator door not being tightly closed, the freezer door not being tightly closed, and hot objects being placed in the refrigerator, send a fault reminder message.

[0027] The above technical solution has the following advantages or beneficial effects: By sending a fault reminder message to the user, the user can take timely actions to prevent the operating efficiency of the refrigerator from decreasing due to the failure not being processed in time.

[0028] To achieve the above object, an embodiment of the present invention further provides a method for controlling a refrigerator, including: obtaining refrigerator status data; when the refrigerator status data meets the condition of the refrigerator door not being tightly closed or the freezer door not being tightly closed, increasing the operating frequency of the compressor and / or increasing the rotational speed of the blower during the refrigeration stage of the freezer.

[0029] According to the method for controlling a refrigerator of the embodiment of the present invention, the refrigerator status data is obtained through the controller. When the refrigerator status data meets the condition of the refrigerator door not being tightly closed, the controller can increase the operating frequency of the compressor and / or increase the rotational speed of the blower during the refrigeration stage of the freezer, thereby improving the refrigeration performance of the freezer. Specifically, since there is no situation where the freezer door is not tightly closed, high-frequency refrigeration and / or increasing the rotational speed of the blower can enable the freezer to reach the set low temperature state faster, shortening the refrigeration time of the freezer. And because the temperature of the freezer rises slowly, the refrigeration effect of the freezer can last longer, which provides more idle time for the compressor after the refrigeration of the freezer is completed and can be used for the refrigeration of the refrigerator to maintain the temperature stability of the refrigerator as much as possible. Therefore, the refrigerator of the present invention realizes that when the refrigerator door is not tightly closed, it can not only maintain the temperature control of the refrigerator, but also enable the freezer to obtain more sufficient refrigeration capacity, ensuring the temperature stability of the refrigerator and the freezer. At the same time, it also reduces the increase in energy consumption caused by the compressor running at high frequency for a long time, thereby ensuring the overall refrigeration performance of the refrigerator and effectively preventing the problem of food spoilage caused by insufficient refrigeration of the freezer.

[0030] In some embodiments, the method further includes: when the refrigerator status data meets the condition of hot objects being placed in the refrigerator and the refrigerator meets the defrosting condition, delaying a second preset duration from the time when it is determined that the refrigerator meets the defrosting condition and then triggering the defrosting program.

[0031] The above technical solution has the following advantages or beneficial effects: When the refrigerator status data meets the fault condition of putting hot objects into the refrigerating chamber, if the refrigerator meets the defrosting condition, the defrosting program is triggered after delaying for a second preset duration starting from the determination that the refrigerator refrigeration time meets the defrosting condition. This strategy can ensure that the refrigerator continuously performs effective refrigeration when needed, avoid further increase in the temperature of the refrigerating chamber due to immediate triggering of defrosting, and protect the safety and freshness of the internal food.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of the temperature change of the refrigerating chamber in normal conditions and when the door is not tightly closed according to an embodiment of the present invention; Figure 2 is a block diagram of a refrigerator according to an embodiment of the present invention; Figure 3 is a block diagram of a cabinet according to an embodiment of the present invention; Figure 4 is a schematic diagram of a refrigeration system according to an embodiment of the present invention; Figure 5 is a schematic diagram of the temperature change of the freezer under different conditions and different compressor frequencies according to an embodiment of the present invention; Figure 6 is a logic block diagram of fault type diagnosis according to an embodiment of the present invention; Figure 7 is a logic schematic diagram of model calculation according to an embodiment of the present invention; Figure 8 is a flowchart of fault type diagnosis according to an embodiment of the present invention; Figure 9 is a flowchart of a method for controlling a refrigerator according to an embodiment of the present invention; Figure 10 is a smart control flowchart of the refrigerator when hot objects are put into the refrigerating chamber according to an embodiment of the present invention; Figure 11 is a smart control flowchart of the refrigerator when hot objects are put into the freezer according to an embodiment of the present invention; Figure 12 is an overall flowchart of a method for controlling a refrigerator according to an embodiment of the present invention.

[0034] Reference Signs: Refrigerator 100; Cabinet 1; Refrigeration system 2; Controller 3; Refrigerating compartment 11; Freezing compartment 12; Variable temperature compartment 13; Compressor 21; Condenser 22; Evaporator 23 for refrigerating compartment; Evaporator 24 for freezing compartment; Evaporator 25 for variable temperature compartment; Liquid accumulator 26. Specific embodiments

[0035] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0036] With the development of home appliance intelligent technology, more and more refrigerator products can detect some fault problems through their own hardware, such as common hardware problems like sensor faults, fan faults, compressor faults, main control board faults, etc. The detection process is relatively simple, and once a fault occurs, it cannot be recovered. However, in addition to these hardware faults, during the use of the refrigerator by users, various problems often occur due to improper human operation, thus affecting the refrigeration effect and energy efficiency of the refrigerator. Specifically, due to human operation, when the user closes the refrigerator door, the door often fails to close completely. This is because although the user has performed the door closing operation, due to the buffer at the door being stuck or there being an obstruction (such as a plastic bag, etc.), the door fails to be completely sealed. This problem will cause continuous leakage of cold, directly affecting the overall refrigeration effect of the refrigerator, resulting in an increase in the temperature of the freezing compartment, and at the same time increasing energy consumption. This not only brings additional electricity expenses to users, but also may affect the quality of stored food due to insufficient refrigeration in the freezing compartment.

[0037] In the prior art, for the problem of the refrigerating compartment door not being closed tightly, the solution is to enhance the refrigeration capacity of the refrigerating compartment by increasing the operating frequency of the compressor during the refrigeration process of the refrigerating compartment. However, due to the relatively high temperature of the refrigerating compartment compared to the freezing compartment and the existence of cold leakage, the effect of this solution is limited. Specifically, when it is detected that the refrigerator refrigerating compartment door is not closed tightly, at this time, in order to ensure the refrigeration capacity of the refrigerating compartment, the refrigerator will always be in a state of giving priority to refrigerating the refrigerating compartment. When the temperature of the refrigerating compartment reaches the shutdown point or when the refrigeration time of the refrigerating compartment reaches a fixed time, it will start to refrigerate other compartments. Therefore, when there is a problem with the refrigerating compartment door not being closed tightly, the temperature of the refrigerating compartment can basically be maintained within the normal start-stop point range. However, due to continuous cold leakage in the refrigerating compartment, the temperature of the refrigerating compartment rises very quickly. It may just reach the shutdown point and then quickly rise to the startup point temperature.

[0038] As Figure 1 shown, Figure 1The dashed line represents the temperature change curve of the refrigerating chamber when the refrigerator is operating normally, and the solid line represents the temperature change curve of the refrigerating chamber when the refrigerating door is not tightly closed. Under normal circumstances, it takes 4x time for the temperature to rise from the shutdown point to the startup point, and it also takes 4x time for the temperature to drop from the startup point to the shutdown point. However, when the refrigerating chamber door is not tightly closed, due to cold leakage, it only takes 2x time for the temperature at the shutdown point to rise to the startup point temperature, but it takes 8x time for the temperature to drop from the startup point to the shutdown point. The refrigeration time is twice the original time, and the non-refrigeration time is also shortened to half of the original time. This results in ineffective refrigeration in the freezer. Considering the refrigeration time of the refrigerating chamber, the actual refrigeration time of the freezer is shortened from the original 4x to 2x, while the non-refrigeration time increases from the original 4x to 8x. Even though the refrigerant flowing out of the evaporator in the refrigerating chamber still passes through the evaporator in the freezer, since the temperature of the refrigerant flowing out of the evaporator in the refrigerating chamber is relatively higher than that of the evaporator in the freezer, this significantly reduces the refrigeration effect of the freezer and makes it difficult to maintain a sufficiently low temperature state, thus affecting the freshness preservation effect of the food in the freezer.

[0039] To address the above problems, an embodiment of the present invention provides a refrigerator that, when the refrigerating chamber door is not tightly closed, can not only maintain the temperature control of the refrigerating chamber but also enable the freezer to obtain more sufficient refrigeration capacity, avoid the influence of cold leakage in the refrigerating chamber on the refrigeration performance of the freezer, and at the same time reduce the increase in energy consumption, thereby ensuring the overall refrigeration effect of the refrigerator and effectively preventing the problem of food spoilage caused by insufficient refrigeration in the freezer.

[0040] The following refers to Figures 2 - 8 Describe the refrigerator according to an embodiment of the present invention.

[0041] Figure 2 is a block diagram of a refrigerator according to an embodiment of the present invention.

[0042] As Figure 2 shown, the refrigerator 100 includes a cabinet 1.

[0043] In some embodiments, the cabinet 1 is the external structure of the refrigerator 100, providing physical protection for the internal space of the refrigerator 100, that is, it can protect the internal refrigeration components and food from the external environment, such as dust, moisture, collision, etc. Through the thermal insulation material, the cabinet 1 can effectively isolate the temperature difference between the inside and outside of the refrigerator 100, reduce refrigeration loss, and ensure the refrigeration and freezing effects inside the refrigerator 100. In addition, the cabinet 1 provides structural support for each component of the refrigerator 100 (such as the compressor, condenser 22, heat exchange subsystem), enabling the entire refrigerator 100 to operate stably.

[0044] As Figure 3As shown, the cabinet 1 is at least configured with different functional areas such as a refrigerating chamber 11 and a freezing chamber 12 to meet the storage needs of users for different foods. Among them, the refrigerating chamber 11 is an independent space inside the refrigerator 100, suitable for storing foods that do not need to be frozen but need to be stored at a low temperature, such as vegetables, fruits, beverages, dairy products, etc. By keeping the temperature within a lower range, the shelf life of the foods can be effectively extended. The temperature inside the refrigerating chamber 11 can be kept between 2°C and 8°C, and the specific temperature can be adjusted according to the type of food. The freezing chamber 12 is another independent space inside the refrigerator 100, suitable for storing meats, seafood, frozen foods, etc. The freezing chamber 12 can quickly freeze foods, keep the nutritional components of the foods from being lost, and can also be used for making ice cubes and frozen beverages. The temperature of the freezing chamber 12 can be kept within the range of -18°C or lower. By maintaining a low-temperature environment, the foods can be frozen, bacteria growth and food spoilage can be prevented, and the storage time of the foods can be extended.

[0045] As Figure 2 shown, the refrigerator 100 further includes a refrigeration system 2.

[0046] In some embodiments, the refrigeration system 2 is a core functional module of the refrigerator 100. Its function is to transfer the heat inside the refrigerator 100 to the outside through the cyclic flow of the refrigerant, so as to achieve the refrigeration and freezing functions, and ensure the freshness of refrigerated foods and the long-term storage of frozen foods.

[0047] Figure 4 is a schematic diagram of a refrigeration system according to an embodiment of the present invention. As Figure 4 shown, the refrigeration system 2 includes a compressor 21, a blower, a condenser 22, a refrigerating chamber heat exchange subsystem, and a freezing chamber heat exchange subsystem.

[0048] In some embodiments, the compressor 21 is one of the core components of the refrigeration system 2. It compresses the refrigerant to increase its pressure and pushes the refrigerant to circulate inside the refrigeration system 2. The refrigerant exchanges heat through each heat exchange subsystem, thereby achieving the effect of cooling.

[0049] In some embodiments, the blower is a device used to promote air flow in the refrigeration system 2. It can be driven by an electric motor and can generate an air flow through rotating blades to help circulate cold air inside and outside the refrigerator 100. The type of the blower can be centrifugal or axial, depending on the design requirements.

[0050] In some embodiments, the main function of the fan is to drive the cold air to flow inside the refrigerator 100, ensuring that the cold air is evenly distributed to every corner of the refrigerating chamber 11 and the freezing chamber 12, thereby improving the refrigeration efficiency. In the condenser 22, the fan helps improve the heat exchange efficiency. It discharges the hot air around the condenser 22, enabling the condenser 22 to more effectively cool the refrigerant and convert it into a liquid state. In addition, to a certain extent, the fan can also help prevent the accumulation of frost. By enhancing air flow, it reduces the aggregation of moisture, thus slowing down the frosting phenomenon inside the refrigerator 100.

[0051] In some embodiments, the condenser 22 is an important component in the refrigeration system 2, and its function is to cool and condense the high-temperature and high-pressure gaseous refrigerant into a high-pressure liquid refrigerant. The condenser 22 dissipates the heat in the refrigerant by exchanging heat with the outside air.

[0052] In some embodiments, the condenser 22 can adopt air-cooled or water-cooled methods. For an air-cooled condenser, there can be multiple heat sinks on the surface of the condenser 22 to increase the contact area with air and enhance the heat dissipation efficiency. In some high-end or special-purpose refrigerators 100, a water-cooled condenser can be adopted to take away heat through cooling water, further improving the condensation efficiency, especially in a hot environment.

[0053] In some embodiments, the refrigerating chamber heat exchange subsystem can refer to the components used to transfer cold to the inside of the refrigerating chamber 11. The refrigerating chamber heat exchange subsystem can include the refrigerating chamber evaporator 23, whose function is to reduce the temperature of the refrigerating chamber 11 through the vaporization and heat absorption process of the refrigerant when the low-temperature and low-pressure refrigerant flows through the refrigerating chamber evaporator 23. The refrigerating chamber evaporator 23 can evenly distribute the cold, ensuring the temperature balance in the refrigerating chamber 11, maintaining the temperature between 2°C and 8°C, ensuring that the temperature in the refrigerating chamber 11 is suitable for storing foods that do not need to be frozen, and extending the freshness period of the food.

[0054] In some embodiments, the refrigerating chamber evaporator 23 can be made of high thermal conductivity materials such as aluminum or copper. Among them, the aluminum evaporator is light in weight and good in thermal conductivity, and can quickly absorb the heat in the refrigerating chamber 11, ensuring uniform and stable temperature. In addition, the refrigerating chamber evaporator 23 can adopt a multi-layer coil structure according to the design of the refrigerator 100 to further enhance the heat exchange effect.

[0055] In some embodiments, the freezing chamber heat exchange subsystem can include the freezing chamber evaporator 24, which is responsible for transferring cold to the inside of the freezing chamber 12. The freezing chamber evaporator 24 absorbs the heat in the freezing chamber 12, ensuring that the temperature drops to -18°C or lower, ensuring that the food freezes quickly, thereby preventing food spoilage and being suitable for long-term food storage.

[0056] In some embodiments, the freezer evaporator 24 can be designed as a coil evaporator. Depending on the different design requirements of the freezer compartment 12, the arrangement and surface area of the freezer evaporator 24 can vary. For the freezer compartment 12 that requires a quick-freezing function, the surface area and refrigerant flow rate of the freezer evaporator 24 can be larger to ensure rapid refrigeration.

[0057] In some embodiments, the input port of the refrigerating chamber heat exchange subsystem and the input port of the freezer compartment heat exchange subsystem are respectively connected to the output port of the condenser 22, and the input port of the condenser 22 is connected to the exhaust port of the compressor 21.

[0058] As Figure 2 shown, the refrigerator 100 further includes a controller 3.

[0059] In some embodiments, the controller 3 is the intelligent core of the refrigerator 100, responsible for managing the operating state of the refrigerator 100. It monitors the sensor data of the refrigerator 100 and makes adjustments based on the operating environment. Especially under fault or abnormal conditions, the controller 3 can control the operation of the compressor 21 according to the set logic.

[0060] In some embodiments, the controller 3 is connected to the refrigeration system 2, and the controller 3 is configured to: obtain the refrigerator status data, and when the refrigerator status data meets the fault condition that the refrigerating chamber door is not tightly closed, increase the operating frequency of the compressor 21 and / or increase the rotational speed of the blower during the refrigeration stage of the freezer compartment 12.

[0061] Among them, the refrigerator status data can include 60 parameters such as the set temperature of the refrigerating / freezing / variable temperature compartments, the temperature of the refrigerating / freezing / variable temperature sensors, the temperature of the refrigerating / freezing / variable temperature evaporator sensors, the door switch status of the refrigerating / freezing / variable temperature compartments, the refrigerating / freezing / variable temperature refrigeration status, the blower frequency of the refrigerating / freezing / variable temperature compartments, the switch status of the defrost heaters of the refrigerating / freezing / variable temperature compartments, the operating frequency of the compressor, the mode status, various sensor faults, and blower faults. These data cover the overall operation of the refrigerator 100, and the status of the refrigerator 100 can be accurately evaluated through these parameters.

[0062] In some embodiments, the refrigerator status data is obtained in real time through a variety of sensors inside the refrigerator 100. These sensors can include temperature sensors, humidity sensors, pressure sensors, door switch sensors, power sensors, blower speed sensors, etc.

[0063] The refrigerator 100 according to an embodiment of the present invention obtains refrigerator status data through the controller 3. When the refrigerator status data meets the fault condition of the refrigerating chamber door not being closed tightly, the controller 3 can increase the operating frequency of the compressor 21 and / or increase the rotational speed of the blower during the refrigeration stage of the freezer 12, thereby improving the refrigeration performance of the freezer 12. Specifically, since there is no situation where the door of the freezer 12 is not closed tightly, high-frequency refrigeration and / or increasing the rotational speed of the blower can enable the freezer 12 to reach the set low temperature state faster, shortening the refrigeration time of the freezer 12. And because the temperature of the freezer 12 rises slowly, the refrigeration effect of the freezer 12 can last longer, which provides more idle time for the compressor 21 after the refrigeration of the freezer 12 is completed, and can be used for the refrigeration of the refrigerating chamber 11 to maintain the temperature stability of the refrigerating chamber 11 as much as possible. Therefore, the refrigerator 100 of the present invention realizes that when the refrigerating chamber door is not closed tightly, it can not only maintain the temperature control of the refrigerating chamber 11, but also enable the freezer 12 to obtain more sufficient refrigeration capacity, ensuring the temperature stability of the refrigerating chamber 11 and the freezer 12. At the same time, it also reduces the increase in energy consumption caused by the long-term high-frequency operation of the compressor 21, thereby ensuring the overall refrigeration performance of the refrigerator 100 and effectively preventing the problem of food deterioration caused by insufficient refrigeration of the freezer 12.

[0064] In some embodiments, the controller 3 is configured to control the compressor 21 to operate at a first preset frequency during the refrigeration stage of the freezer 12 when the refrigerator status data meets the fault condition of the refrigerating chamber door not being closed tightly, wherein the compressor 21 is provided with a first preset frequency and a second preset frequency corresponding to the same ambient temperature, and the first preset frequency is higher than the second preset frequency.

[0065] In some embodiments, the first preset frequency may refer to the high-frequency mode when the compressor 21 operates under certain specific conditions. This frequency is higher than the compressor frequency of the refrigerator 100 in the normal operating state and is used to quickly reduce the internal temperature of the refrigerator 100. The second preset frequency may refer to the frequency of the compressor 21 in the normal working state. This frequency is lower and is suitable for maintaining the refrigeration requirements of the refrigerator 100 under normal circumstances. When the refrigerator 100 is at a stable temperature, the compressor 21 will operate at the second preset frequency to maintain the temperatures of the refrigerating chamber 11 and the freezer 12 while reducing energy consumption.

[0066] In some embodiments, when it is detected that the refrigerating chamber door is not closed tightly, the compressor 21 will operate at a higher first frequency. This frequency is designed to accelerate the refrigeration efficiency of the freezer 12 to reduce the influence on the freezer 12 due to the cold leakage of the refrigerating chamber 11. Through a higher frequency, the freezer 12 can cool down faster, and because the temperature of the freezer 12 rises slowly, the compressor 21 can provide cold for the refrigerating chamber 11 during the remaining time to maintain its temperature control.

[0067] In some embodiments, such asFigure 5 As shown Figure 5 The thick solid line in the figure represents the change of the temperature in the freezer compartment 12 with time during the normal operation of the refrigerator 100; the thin solid line represents the change of the temperature in the freezer compartment 12 with time when the refrigerating door is not tightly closed and the compressor 21 refrigerates the freezer compartment 12 at the second preset frequency; the dotted line represents the change of the temperature in the freezer compartment 12 with time when the refrigerating door is not tightly closed and the compressor 21 switches to the first preset frequency to refrigerate the freezer compartment 12. Experimental verification shows that during the refrigeration process of the freezer compartment 12, when switching to high-frequency operation during the refrigeration of the freezer compartment 12, although the non-tightly closed refrigerating door causes a certain degree of cold leakage, the temperatures of the refrigerating compartment 11 and the freezer compartment 12 can still be normally guaranteed.

[0068] At the same time, since it is the refrigerating compartment 11 that leaks cold, even if the frequency can be increased during the refrigeration process of the refrigerating compartment 11, the refrigerating compartment 11 will not quickly reach the shutdown point temperature, and after reaching the shutdown point temperature, the temperature will quickly rise due to cold leakage, resulting in frequent high-frequency refrigeration required for the refrigerating compartment 11. This situation will lead to ineffective control of the temperature in the refrigerating compartment 11 and increase energy consumption. However, the refrigerator 100 proposed by the present invention only increases the frequency during the refrigeration stage of the freezer compartment 12, which not only does not cause waste of energy consumption, but also can bring the performance of the refrigerator 100 into full play to ensure effective control of the temperatures of the refrigerating compartment 11 and the freezer compartment.

[0069] In some embodiments, when the refrigerator status data meets the fault condition that the freezer door is not tightly closed, during the refrigeration stage of the freezer compartment 12, the compressor 21 is controlled to operate at the first preset frequency and / or the rotation speed of the blower is increased. This is because when the freezer door is not tightly closed, since the temperature of the freezer compartment 12 is lower than that of the refrigerating compartment 11, more cold leakage occurs, and the safety requirements for frozen foods are higher, and frozen foods are more sensitive to temperature changes. If the temperature of the freezer compartment 12 rises, it will cause the food to lose its frozen state and affect the fresh-keeping effect. Therefore, choosing to control the compressor 21 to operate at the first preset frequency and / or increase the rotation speed of the blower during the refrigeration stage of the freezer compartment 12 can maximize the offset of the temperature rise caused by cold leakage.

[0070] In some embodiments, the controller 3 is further configured to: when the duration for which the temperature of the freezer compartment 12 reaches the target temperature reaches the first preset duration, adjust the operating frequency of the compressor 21 according to the startup rate of the compressor 21. Wherein, the target temperature can be the temperature that the freezer compartment 12 should reach and maintain, and the user can set it according to needs, for example, set it to -18°C or lower. The controller 3 detects the actual temperature through the temperature sensor in the freezer compartment 12 and compares it with the target temperature. When the temperature of the freezer compartment 12 drops to the set target temperature and remains stable, the system will record this state.

[0071] In some embodiments, the first preset duration can be a relatively short period of time, which is used to ensure that the temperature remains stable after reaching the target value. For example, the first preset duration can be designed as an observation period of 2 to 3 minutes, so that the system can confirm the temperature stability. This observation period helps to reduce unnecessary frequency adjustments caused by short-term temperature fluctuations, thereby improving the stability and efficiency of the system.

[0072] In some embodiments, the startup rate of the compressor 21 can refer to the proportion of the working duration of the compressor 21 in a certain period of time to the total duration. For example, if the compressor 21 has run for 8 minutes in the past 10 minutes, the startup rate is 80%. If the startup rate of the compressor 21 is relatively high, it means that the compressor 21 starts frequently and runs for a long time, and the system may be in a high-load operating state. If the startup rate is relatively low, it means that the compressor 21 is mostly in the off state and the system load is small.

[0073] In some embodiments, when the startup rate of the compressor is relatively high, the controller 3 can keep the compressor 21 running at a relatively high frequency to ensure that the temperature in the freezer can be maintained at the target temperature. When the startup rate of the compressor is relatively low, it indicates that the heat load inside the freezer 12 is small and the temperature remains stable. Therefore, the controller 3 can reduce the operating frequency of the compressor 21 to save energy consumption, so as to ensure that the refrigerator 100 works with maximum performance.

[0074] Therefore, by monitoring the startup rate of the compressor 21, the controller 3 can flexibly adjust the operating frequency of the compressor 21 according to the actual refrigeration demand. When the startup rate is high, the compressor frequency remains at a high level to ensure rapid refrigeration; when the startup rate is low, the compressor frequency decreases to reduce energy consumption, which can achieve energy conservation to the greatest extent. Running the compressor 21 at a high frequency for a long time may increase its wear, and by dynamically adjusting the frequency, the controller 3 can reduce the frequency of the compressor 21 when the temperature in the freezer is stable, thereby reducing the operating load of the compressor 21 and extending its service life, and further improving the energy efficiency of the refrigerator 100.

[0075] In some embodiments, the controller 3 is configured to: when the startup rate of the compressor 21 is less than the preset startup rate threshold, control the compressor 21 to run at a second preset frequency. Among them, the preset startup rate threshold can be a reference value set in advance by the system or the user according to the specific working mode and energy efficiency target of the refrigerator 100, and is used to judge whether the startup rate of the compressor 21 is too high or too low. For example, the preset threshold can be set to 85%. A startup rate of 85% means that in each monitoring cycle, the compressor 21 runs for 85% of the time and stops for 15% of the time. If the startup rate of the compressor 21 is lower than this threshold, it means that the refrigeration demand of the system decreases, and the controller 3 can lower the operating frequency of the compressor 21 to reduce energy consumption.

[0076] In some embodiments, by maintaining the startup rate of the compressor 21 within the range of 85% to 90%, the system can ensure that the refrigerator 100 optimizes energy consumption and operating efficiency to the maximum extent while maintaining the refrigeration effect.

[0077] In some embodiments, in addition to the failure cases where the refrigerator doors of the refrigerating compartment and the freezing compartment are not properly closed, the refrigerator 100 may also face inappropriate operations such as users putting hot items into the refrigerating compartment 11. In this case, the temperature sensor of the refrigerator 100 will sense the increase in the temperature inside the refrigerating compartment 11, and then the system will automatically enter a long-term refrigeration mode. During the refrigeration process, the controller 3 needs to increase the operating frequency of the compressor 21 in order to restore the temperature of the refrigerating compartment 11 to the normal level in the shortest time. This method is a common refrigeration strategy adopted by many existing refrigerator technologies. However, there are some problems with this method, that is, the setting logic of the refrigerator 100 is that when the refrigeration time of the refrigerator reaches a certain threshold (such as y min (minutes)), the defrost mechanism is automatically triggered to prevent the compressor 21 from working for a long time and performing ineffective refrigeration. At this time, frost blockage may cause the refrigerator 100 to be unable to refrigerate effectively and instead be in an ineffective operating state for a long time.

[0078] When the refrigerator 100 is operating normally, the refrigerating compartment 11 will go through multiple refrigeration cycles before the refrigeration time reaches y min (minutes), and even when entering the defrost stage, the refrigerating compartment 11 uses the method of blowing air for defrosting, and it will not cause the temperature inside the compartment to be too high. However, when hot items are placed in the refrigerating compartment 11 of the refrigerator, the system may spend a lot of time refrigerating until the temperature returns to the set range. If the refrigeration time at this time reaches y min (minutes), the defrost mechanism will be triggered, resulting in the refrigerator 100 entering the defrost process immediately after the hot items are placed, which will cause the temperature of the refrigerating compartment 11 to rise further. In a high-temperature environment, the food may be seriously affected, especially perishable foods.

[0079] Therefore, the controller 3 is further configured to: when the refrigerator status data meets the fault condition of putting hot items into the refrigerating compartment 11, if the refrigerator 100 meets the defrost condition, delay the second preset duration from the time when it is determined that the refrigeration time of the refrigerator meets the defrost condition and then trigger the defrost program. This strategy can ensure that the refrigerator 100 continues to refrigerate effectively when needed, avoiding further increase in the temperature of the refrigerating compartment 11 caused by immediately triggering defrosting, and protecting the safety and freshness of the internal food. Therefore, the purpose of delaying the second preset duration is to ensure that the hot items in the refrigerating compartment 11 are quickly cooled to a lower temperature through the refrigeration process before considering triggering the defrost program, avoiding the impact on food quality caused by temperature fluctuations.

[0080] In some embodiments, defrosting may refer to the frost layer formed on the evaporator inside the refrigerator due to long-term operation. This frost layer will significantly affect the refrigeration effect. When the moisture inside the refrigerator 100 freezes under low-temperature conditions, the heat exchange efficiency of the evaporator will decrease. To maintain a good refrigeration effect, the controller 3 needs to execute a defrosting program under specific conditions. The controller 3 can monitor the temperature of the refrigerating chamber 11 and the freezing chamber 12, the refrigeration time, and the accumulation of the frost layer through temperature sensors, humidity sensors, etc., to determine whether the defrosting conditions are met.

[0081] In some embodiments, the controller 3 is further configured to: starting from when it is determined that the refrigeration time of the refrigerator meets the defrosting conditions and lasting for a second preset duration, if the temperature of the refrigerating chamber 11 is within the normal refrigeration temperature range and the refrigerator 100 still meets the defrosting conditions, then control the refrigerator 100 to execute the defrosting program. Among them, judging whether the temperature in the refrigerating chamber 11 remains within the normal refrigeration range (such as between 2°C and 8°C) can ensure the safe storage of food. This is to prevent the temperature from being too high during the defrosting program, which may affect the freshness preservation of the ingredients inside the refrigerator 100.

[0082] In some embodiments, the controller 3 is further configured to: within a third preset duration, if the number of times the refrigerator status data meets the condition of putting hot objects into the refrigerating chamber 11 reaches a number threshold, when the refrigerator 100 meets the defrosting conditions again, control the refrigerator 100 to directly execute the defrosting program, where the third preset duration is greater than the second preset duration.

[0083] In some embodiments, the third preset duration may refer to the time period during which the controller 3 monitors whether hot objects are put into the refrigerating chamber 11. During this period, the controller 3 can count the refrigerator status data to judge the frequency of faults. The third preset duration can be set according to actual needs. For example, it can be set to 24 hours, and this period is sufficient to capture the user's daily usage habits. Through this setting, the controller 3 can obtain a relatively long time window to identify whether the behavior of putting hot objects into the refrigerating chamber 11 is frequent.

[0084] In some embodiments, the number threshold can be set according to actual needs. For example, it can be set to 2 times. That is to say, within 24 hours, if the number of times the user continuously puts hot objects reaches or exceeds 2 times, when the refrigerator 100 meets the defrosting conditions again, the controller 3 will decide to execute the defrosting program and no longer execute the logic of delayed defrosting. This is mainly to ensure that the refrigerator 100 can defrost normally when necessary and reduce the decrease in refrigeration efficiency caused by frost blockage.

[0085] Such as Figure 3As shown, the cabinet 1 is also configured with a variable temperature compartment 13. Among them, the variable temperature compartment 13 is a storage space inside the refrigerator 100 with adjustable temperature, allowing users to adjust the storage conditions within the refrigeration, freezing, or other temperature ranges according to needs. This design aims to provide more flexible storage options to meet the storage requirements of different types of food ingredients. The temperature of the variable temperature compartment 13 can be adjusted by the controller 3. For example, when storing fresh food ingredients, it can be set to a lower temperature, while when storing other foods, it can be set to a higher temperature to extend the freshness preservation time of the food ingredients.

[0086] As Figure 4 shown, the refrigeration system 2 also includes a variable temperature compartment heat exchange subsystem, which may include a variable temperature compartment evaporator 25 for realizing heat exchange within the variable temperature compartment 13 to ensure that the indoor temperature reaches the user-set value. When it is necessary to adjust the temperature of the variable temperature compartment 13, the controller 3 can achieve this by adjusting the operating state of the variable temperature compartment heat exchange subsystem. For example, by controlling the flow rate and temperature of the refrigerant.

[0087] In some embodiments, the input ports of the variable temperature compartment heat exchange subsystem, the refrigerating compartment heat exchange subsystem, and the freezing compartment heat exchange subsystem are respectively connected to the output port of the condenser 22. This means that after the refrigerant is condensed in the condenser 22, it can be effectively distributed to each heat exchange subsystem to ensure that each space (the variable temperature compartment 13, the refrigerating compartment 11, the freezing compartment 12) can obtain the required cooling effect.

[0088] In some embodiments, the output port of the variable temperature compartment heat exchange subsystem and the output port of the refrigerating compartment heat exchange subsystem are refluxed and then input to the freezing compartment heat exchange subsystem. This connection method allows the cold air flows of the variable temperature compartment 13 and the refrigerating compartment 11 to act on the freezing compartment 12 together, enabling the freezing compartment 12 to utilize the excess cold air in the refrigerating compartment 11, thereby improving the overall efficiency of the refrigeration system 2 and avoiding waste of cold air.

[0089] In some embodiments, the output port of the freezing compartment heat exchange subsystem is connected to the suction port of the compressor 21 through a liquid receiver 26 to form a complete refrigeration cycle system. Among them, the function of the liquid receiver 26 is to balance the refrigerant flow rate in the system, ensure the stable operation of the compressor 21, and maintain an appropriate pressure.

[0090] In some embodiments, the controller 3 is further configured to: determine the fault type of the user usage fault satisfied by the refrigerator state data through a bad fault diagnosis model, such as Figure 6 shown, the bad fault diagnosis model takes the refrigerator state data as input and the fault type as output. The fault type includes at least one of the faults of the refrigerating compartment door not being closed tightly, the freezing compartment door not being closed tightly, and the fault of putting hot objects into the refrigerating compartment 11.

[0091] Among them, the malfunction diagnosis model is a data-driven algorithm model used to detect possible malfunctions during the operation of the refrigerator 100. Its function is to automatically identify whether the system is in an abnormal state through real-time monitoring of the operation status of the refrigerator, so as to predict and handle potential malfunctions. This model can be trained based on machine learning (ML) or deep learning (DL) algorithms, and learn the differences between the normal state and the abnormal state through a large amount of historical operation data. It can process data from multiple sensors inside the refrigerator 100, such as temperature, humidity, compressor operation status, door switch times, refrigeration time, etc., and use these data to determine whether there is a malfunction.

[0092] Specifically, taking the deep learning algorithm as an example, multiple sensors inside the refrigerator 100 (such as temperature sensors, humidity sensors, door switch sensors, compressor status sensors, etc.) can regularly collect data. This data may include some noise or incomplete information, so it needs to be preprocessed before being directly input into the malfunction diagnosis model. For example: data cleaning (removing invalid or abnormal data), data standardization (scaling the data within a certain range for easy model processing), etc. The purpose of preprocessing is to clean and standardize the data to provide high-quality input for subsequent analysis.

[0093] Furthermore, the preprocessed data is input into the malfunction diagnosis model. Through a large amount of historical data, the deep learning model can be trained to gradually optimize the parameters to improve the accuracy of malfunction detection. After the model is fully trained and optimized, it can process newly input data in real time, and can quickly analyze the data and obtain the type of malfunction.

[0094] In some embodiments, the controller 3 is further configured to: when the refrigerator status data reaches a preset data volume, perform malfunction type diagnosis through the malfunction diagnosis model.

[0095] Among them, the preset data volume can be used as a trigger condition for malfunction diagnosis. By requiring the data volume to reach a certain threshold before performing the diagnosis, it is avoided that the system makes a judgment immediately after each data collection. This design effectively prevents the system from triggering diagnoses frequently in a short period of time, reducing unnecessary calculations and resource consumption. In addition, the accumulation of data volume also helps to improve the accuracy of malfunction diagnosis. Single or a small amount of sensor data may be affected by noise or instantaneous fluctuations, which may lead to misjudgment. If the system makes a diagnosis immediately after each data collection, it may mistakenly think that the device has a malfunction due to abnormal fluctuations. By performing the diagnosis after accumulating enough data volume, the system can better capture the overall operation trend of the refrigerator 100, eliminate the influence of short-term fluctuations, and thus more accurately determine whether there is a malfunction.

[0096] For example, in order to improve the accuracy of judgment, a preset data volume can be set to n pieces, that is, only when the data volume input into the model reaches n pieces, the model will perform diagnosis. Compared with outputting a diagnosis result by only inputting 1 piece of data, accumulating n pieces of data helps the model analyze the data change trend within a certain period of time, so as to make a more accurate diagnosis. Specifically, continuous time-series data is used for analysis, that is, n pieces of data are collected at intervals of m minutes as a sample and input into the model for diagnosis. The calculation flow chart of the model is as shown in Figure 7 shown. In Figure 7 , x(0), x(1),..., x(n - 1) are n pieces of data required for one diagnosis input, h is the output of the model at the previous moment, and the finally output y(n) is the diagnosis result. Therefore, the bad fault diagnosis model of the embodiment of the present invention needs to judge whether the saved data volume is n pieces (where n is the minimum data volume required for one diagnosis). When the data volume is less than n pieces, data is continuously collected and saved. When the data volume accumulates to n pieces, the bad fault diagnosis model is called for diagnosis. After new data is collected, the new data is saved and the first piece of data in the save area is deleted, and the bad fault diagnosis model is called to re-diagnose. By this method of selecting data by sliding window, it can be ensured that a good diagnosis effect can be achieved even when the data volume is not large.

[0097] In some embodiments, the establishment of the bad fault diagnosis model depends on the relevant faults simulated in the laboratory. By setting different temperatures and changing the environmental temperature conditions, a large amount of laboratory data is collected, and combined with the actual data reported by the cloud user refrigerator 100, the normal data and fault data are classified through data analysis. First, a model is designed for self-training, and the learned and inferred model file can be directly used, so that it can provide a relatively accurate diagnosis result for the data change of the refrigerator 100 that also has relevant faults.

[0098] In some embodiments, the refrigerator 100 will perform diagnosis through the bad fault diagnosis model only after the intelligent diagnosis function is turned on. By default, the intelligent diagnosis function is turned on when the refrigerator 100 leaves the factory. The refrigerator 100 can be provided with a switch for controlling the intelligent diagnosis function, and the user can turn off the diagnosis function through this switch to avoid unnecessary diagnosis under certain abnormal conditions and prevent misjudgment caused by external environmental interference.

[0099] In some embodiments, the controller 3 is further configured to: when the refrigerator status data meets the conditions of any one of the faults of the refrigerating chamber door not being closed tightly, the freezing chamber door not being closed tightly, and the fault of putting hot objects into the refrigerating chamber 11 or the freezing chamber 12, send a fault reminder message.

[0100] Among them, the sending of the fault reminder information aims to enable users to take timely actions to prevent the operating efficiency of the refrigerator from decreasing due to the failure not being processed in time. For example, when the door of the refrigerating chamber 11 or the freezer is not properly closed, the cold air will continuously leak out, causing the compressor 21 to work for a long time and increasing the energy consumption. In addition, if the system detects that the user puts hot items into the refrigerator 100 multiple times within a week, the refrigeration system 2 of the refrigerator 100 may take a longer time to restore the internal temperature to the normal level, further increasing the energy consumption and possibly affecting the freshness preservation effect of other food materials in the refrigerator 100. Through the reminder function, the user can close the refrigerator door in time or wait for the food to cool down before putting it into the refrigerator 100. In this way, it not only reminds the user to develop good usage habits but also informs the user of the possible increase in energy consumption and the potential impact on food materials caused by putting hot items. This function helps the user optimize the usage method of the refrigerator 100, effectively reducing unnecessary energy consumption and ensuring the quality of food materials.

[0101] In some embodiments, the fault reminder information is not only notified to the user through the local display or alarm of the refrigerator 100 but also sent to the user's mobile device through the Internet of Things (IoT) technology. For example, if the refrigerator door is not closed for a long time or it is detected that hot items are put into the refrigerating chamber 11, the system can push the reminder information to the user's smartphone application through Wi-Fi or Bluetooth connection. Even when the user is not at home, they can receive the alarm through the mobile phone, timely understand the operating status of the refrigerator 100, and take corresponding measures.

[0102] Figure 8 is a flowchart of fault type diagnosis according to an embodiment of the present invention, as Figure 8 shown, the process of fault type diagnosis at least includes steps S1 - S14.

[0103] S1, Start.

[0104] S2, The refrigerator enables the intelligent diagnosis function.

[0105] S3, Collect the refrigerator status data.

[0106] S4, Preprocess the refrigerator status data.

[0107] S5, Cumulatively store the preprocessed data.

[0108] S6, Determine whether the cumulatively stored refrigerator status data reaches the preset data volume n. If it reaches, go to step S7; if not, return to step S3.

[0109] S7, Perform fault type diagnosis through the bad fault diagnosis model.

[0110] S8, Determine that the diagnosis result is normal.

[0111] S9, it is determined that the diagnosis result is a fault that the refrigerator compartment door is not closed tightly.

[0112] S10, it is determined that the diagnosis result is a fault that the freezer compartment door is not closed tightly.

[0113] S11, it is determined that the diagnosis result is a fault that hot objects are placed in the refrigerator compartment.

[0114] S12, according to the diagnosis result, control the intelligent operation of the refrigerator.

[0115] S13, when the refrigerator status data meets the conditions of any one of the faults of the refrigerator compartment door not being closed tightly, the freezer compartment door not being closed tightly, and hot objects being placed in the refrigerator compartment, send a fault reminder message.

[0116] S14, end.

[0117] Generally speaking, by enabling the intelligent diagnosis function to monitor the status of the refrigerator 100 in real time, continuously collecting and preprocessing the refrigerator status data, after accumulating to a preset quantity, analyze through the bad fault diagnosis model to identify the fault type (such as the refrigerator compartment door not being closed tightly, the freezer compartment door not being closed tightly, or hot objects being placed in the refrigerator compartment 11, etc.). According to the diagnosis result, the controller 3 can perform intelligent operation adjustment on the refrigerator 100 and send a fault reminder message when a fault is detected to ensure that the user can timely understand the device status, thereby improving the refrigeration performance of the refrigerator 100.

[0118] Next, refer to Figure 9 Describe the method for controlling a refrigerator according to an embodiment of the present invention.

[0119] Figure 9 is a flowchart of a method for controlling a refrigerator according to an embodiment of the present invention. As Figure 9 shown, the method for controlling a refrigerator includes at least steps S20 - S21.

[0120] S20, obtain the refrigerator status data.

[0121] In some embodiments, the refrigerator status data may include 60 parameters such as the set temperature of the refrigerator / freezer / varifunction zone, the temperature of the refrigerator / freezer / varifunction zone sensor, the temperature of the evaporator sensor of the refrigerator / freezer / varifunction zone, the door switch status of the refrigerator / freezer / varifunction zone, the refrigeration status of the refrigerator / freezer / varifunction zone, the fan frequency of the refrigerator / freezer / varifunction zone, the defrost heater switch status of the refrigerator / freezer / varifunction zone, the compressor operation frequency, the mode status, various sensor faults, fan faults, etc.

[0122] In some embodiments, the refrigerator status data is obtained in real time through a variety of sensors inside the refrigerator. These sensors may include temperature sensors, humidity sensors, pressure sensors, door switch sensors, power sensors, fan speed sensors, etc.

[0123] S21, when the refrigerator status data meets the fault condition that the refrigerator door is not tightly closed or the freezer door is not tightly closed, increasing the operating frequency of the compressor and / or increasing the speed of the fan during the refrigeration stage of the freezer.

[0124] In some embodiments, the first preset frequency may refer to a high-frequency mode when the compressor is running under certain specific conditions, which is higher than the compressor frequency of the refrigerator in normal operation and is used to quickly reduce the temperature inside the refrigerator. The second preset frequency may refer to the frequency of the compressor in normal working conditions, which is lower and suitable for maintaining the refrigeration needs of the refrigerator under normal conditions. When the refrigerator is at a stable temperature, the compressor will run at the second preset frequency to maintain the temperature of the refrigerator and freezer while reducing energy consumption.

[0125] In some embodiments, when it is detected that the refrigerator door is not tightly closed, the compressor will operate at a higher first frequency. This frequency is designed to accelerate the refrigeration efficiency of the freezer compartment to reduce the impact of the refrigerator compartment on the freezer compartment due to the leakage of cold from the refrigerator compartment. With a higher frequency, the freezer compartment can cool down faster, and since the temperature of the freezer compartment rises slowly, the compressor can provide cold air to the refrigerator compartment in the remaining time to maintain its temperature control.

[0126] According to the method for controlling a refrigerator in an embodiment of the present invention, the controller obtains refrigerator status data. When the refrigerator status data meets the fault condition that the door of the refrigerator compartment is not closed tightly, the controller can increase the operating frequency of the compressor and / or increase the speed of the fan during the refrigeration stage of the freezer compartment, thereby improving the refrigeration performance of the freezer compartment. Specifically, since the door of the freezer compartment is not closed tightly, high-frequency refrigeration and / or increasing the speed of the fan can make the freezer compartment reach the set low temperature state faster, shortening the refrigeration time of the freezer compartment. And since the temperature of the freezer compartment recovers slowly, the refrigeration effect of the freezer compartment can last longer, which provides more idle time for the compressor after the refrigeration of the freezer compartment is completed, which can be used for the refrigeration of the refrigerator compartment to maintain the temperature of the refrigerator compartment as stable as possible. Therefore, the refrigerator of the present invention can maintain the temperature control of the refrigerator compartment when the door of the refrigerator compartment is not closed tightly, and the freezer compartment can obtain more sufficient refrigeration capacity, thereby ensuring the temperature stability of the refrigerator compartment and the freezer compartment. At the same time, the energy consumption increase caused by the long-term high-frequency operation of the compressor is reduced, thereby ensuring the overall refrigeration performance of the refrigerator, and effectively preventing the problem of food deterioration caused by insufficient refrigeration of the freezer compartment.

[0127] In some embodiments, the method for controlling the refrigerator further includes: when the refrigerator status data meets the condition of putting hot objects into the refrigerating chamber, if the refrigerator meets the defrosting condition, start delaying for a second preset duration from the moment when it is determined that the refrigerating time of the refrigerator meets the defrosting condition, and then trigger the defrosting program. Similarly, when the refrigerator status data meets the condition of putting hot objects into the freezing chamber, if the refrigerator meets the defrosting condition, start delaying for a second preset duration from the moment when it is determined that the refrigerating time of the refrigerator meets the defrosting condition, and then trigger the defrosting program.

[0128] In some embodiments, the specific value of the second preset duration can be set according to design requirements. For example, the second preset duration can be set to 6h (hours). This means that when it is detected that hot objects are put into the refrigerating chamber, the controller can refrain from triggering the defrosting program within 6 hours after confirming that the refrigerating time of the refrigerator meets the defrosting condition.

[0129] In some embodiments, the method for controlling the refrigerator further includes: when the duration from the moment when it is determined that the refrigerating time of the refrigerator meets the defrosting condition reaches the second preset duration, if the temperature in the refrigerating chamber is within the normal refrigerating temperature range and the refrigerator still meets the defrosting condition, then control the refrigerator to execute the defrosting program. Among them, judging whether the temperature in the refrigerating chamber remains within the normal refrigerating range (such as between 2°C and 8°C) can ensure the safe storage of food. This is to prevent the temperature from being too high during the defrosting program and affecting the freshness preservation of the ingredients inside the refrigerator.

[0130] Figure 10 is the intelligent control flowchart of the refrigerator when hot objects are put into the refrigerating chamber according to an embodiment of the present invention. As Figure 10 shown, the intelligent control process of the refrigerator when hot objects are put into the refrigerating chamber at least includes steps S30 - S36.

[0131] S30, Obtain the refrigerator status data.

[0132] S31, According to the refrigerator status data, determine that the fault type is putting hot objects into the refrigerating chamber fault.

[0133] S32, Judge whether the duration from the moment when it is determined that the refrigerating time of the refrigerator meets the defrosting condition reaches the second preset duration. If it can reach, then enter step S33; if it does not reach, then return to step S30.

[0134] S33, Judge whether the temperature in the refrigerating chamber is within the normal refrigerating temperature range. If it is within, then enter step S34; if it is not within, then enter step S35.

[0135] S34, Judge whether the refrigerator still meets the defrosting condition. If it meets, then enter step S36; if it does not meet, then return to step S30.

[0136] S35, Wait for the temperature in the refrigerating chamber to be within the normal refrigerating temperature range.

[0137] S36, control the refrigerator to execute the defrosting program.

[0138] Figure 11 It is the intelligent control flowchart of the refrigerator when hot objects are placed in the freezer according to an embodiment of the present invention. As Figure 11 shown, the intelligent control process of the refrigerator when hot objects are placed in the freezer at least includes steps S100 - S106.

[0139] S100, obtain the refrigerator status data.

[0140] S101, according to the refrigerator status data, determine that the fault type is the fault of placing hot objects in the freezer.

[0141] S102, judge whether the duration for which the refrigerator refrigeration time meets the defrosting condition has reached the second preset duration. If it can reach, enter step S103; if not, return to step S100.

[0142] S103, judge whether the temperature in the freezer is within the normal freezing temperature range. If it is, enter step S104; if not, enter step S105.

[0143] S104, judge whether the refrigerator still meets the defrosting condition. If it meets, enter step S106; if not, return to step S100.

[0144] S105, wait for the temperature in the freezer to be within the normal freezing temperature range.

[0145] S106, control the refrigerator to execute the defrosting program.

[0146] Generally speaking, when a fault of placing hot objects in the freezer occurs, by adopting the method of delaying defrosting, the normal temperature inside each compartment is preferentially restored. This strategy effectively avoids the refrigerator entering the defrosting process immediately after hot objects are placed, thereby preventing the defrosting operation from causing a further increase in the temperature of the refrigerating compartment or the freezer compartment and having a negative impact on the internal food materials.

[0147] Figure 12 It is the overall flowchart of the method for controlling the refrigerator according to an embodiment of the present invention. As Figure 12 shown, the overall process of the method for controlling the refrigerator at least includes S200 - S220.

[0148] S200, obtain the refrigerator status data.

[0149] S201, according to the refrigerator status data, determine that the fault type is at least one of the faults of the refrigerator door of the refrigerating compartment not being closed tightly, the freezer door not being closed tightly, and the fault of placing hot objects in the refrigerating compartment.

[0150] S202, when the fault type is the fault that the refrigerating chamber door is not closed tightly or the freezing chamber door is not closed tightly, during the refrigeration stage of the freezing chamber, control the compressor to operate at the first preset frequency (high frequency) and / or increase the rotation speed of the blower.

[0151] S203, when the duration for which the temperature of the freezing chamber reaches the target temperature reaches the first preset duration, determine the starting rate of the compressor.

[0152] S204, determine whether the starting rate of the compressor is less than the preset starting rate threshold. If it is less, proceed to step S205; if not, return to step S202.

[0153] S205, control the compressor to operate at the second preset frequency (low frequency).

[0154] S206, by adjusting the operating frequency of the compressor, make the starting rate of the compressor stable at 85% - 90%.

[0155] S207, based on the refrigerator status data, determine that the fault type is the fault that hot objects are placed in the refrigerating chamber.

[0156] S208, determine whether the duration from the start when the refrigerator refrigeration time meets the defrosting condition reaches the second preset duration. If it can reach, proceed to step S209; if not, return to step S200.

[0157] S209, determine whether the temperature of the refrigerating chamber is within the normal refrigerating temperature range. If it is within, proceed to step S210; if not, proceed to step S211.

[0158] S210, determine whether the refrigerator still meets the defrosting condition. If it meets, proceed to step S212; if not, return to step S200.

[0159] S211, wait for the temperature of the refrigerating chamber to be within the normal refrigerating temperature range.

[0160] S212, control the refrigerator to execute the defrosting program.

[0161] S213, based on the refrigerator status data, determine that the fault type is the fault that hot objects are placed in the freezing chamber.

[0162] S214, determine whether the duration from the start when the refrigerator refrigeration time meets the defrosting condition reaches the second preset duration. If it can reach, proceed to step S215; if not, return to step S200.

[0163] S215, determine whether the temperature of the freezing chamber is within the normal freezing temperature range. If it is within, proceed to step S216; if not, proceed to step S217.

[0164] S216, Determine whether the refrigerator still meets the defrosting conditions. If it does, proceed to step S218; if not, return to step S200.

[0165] S217, Wait for the temperature in the freezer to be within the normal freezing temperature range.

[0166] S218, Control the refrigerator to execute the defrosting program.

[0167] S219, Within the third preset duration, if the number of times the refrigerator status data meets the condition of the fault of putting hot objects in the refrigerator compartment reaches the threshold number of times, when the refrigerator meets the defrosting conditions again, do not perform delayed defrosting, and directly control the refrigerator to execute the defrosting program.

[0168] S220, When the refrigerator status data meets the conditions of any one of the faults of the refrigerator compartment door not being closed tightly, the freezer door not being closed tightly, and putting hot objects in the refrigerator compartment or the freezer compartment, send a fault reminder message.

[0169] Generally speaking, by collecting the refrigerator status data, preprocessing the data and then inputting it into the bad fault diagnosis model for diagnosis, judging whether there are problems with improper use of the refrigerator according to the diagnosis result, and providing effective maintenance measures after diagnosis, so that the refrigerator enters the intelligent operation state, thereby ensuring the refrigeration performance of the refrigerator and reducing unnecessary power consumption of the refrigerator. At the same time, intelligent reminders can also be made on the terminal to remind users to perform subsequent operations in a timely manner.

[0170] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0171] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A refrigerator, characterized in that: include: A box body, wherein the box body is at least configured with a refrigerating chamber and a freezing chamber; A refrigeration system, the refrigeration system comprising a compressor, a fan, a condenser, a refrigeration chamber heat exchange subsystem and a freezer chamber heat exchange subsystem, the input port of the refrigeration chamber heat exchange subsystem and the input port of the freezer chamber heat exchange subsystem are respectively connected to the output port of the condenser, and the input port of the condenser is connected to the exhaust port of the compressor; A controller is connected to the refrigeration system, and the controller is configured to: Refrigerator status data is obtained, and when the refrigerator status data meets a fault condition that the refrigerator compartment door is not tightly closed, the operating frequency of the compressor is increased and / or the speed of the fan is increased during the refrigeration stage of the freezer compartment.

2. The refrigerator according to claim 1, characterized in that: The controller is configured to control the compressor to operate at a first preset frequency during the refrigeration stage of the freezer compartment when the refrigerator status data meets the fault condition that the refrigerator compartment door is not tightly closed, wherein the compressor is set with a first preset frequency and a second preset frequency corresponding to the same ambient temperature, and the first preset frequency is higher than the second preset frequency.

3. The refrigerator according to claim 2, characterized in that: The controller is further configured to: when the refrigerator status data meets a freezer door not tightly closed fault condition, control the compressor to operate at the first preset frequency and / or increase the speed of the fan during the refrigeration stage of the freezer.

4. The refrigerator according to any one of claims 1 to 3, characterized in that: The controller is further configured to adjust the operating frequency of the compressor according to the start-up rate of the compressor when the duration for the temperature of the freezing chamber to reach the target temperature reaches a first preset duration.

5. The refrigerator according to claim 4, characterized in that: The controller is configured to control the compressor to operate at the second preset frequency when the on-rate of the compressor is less than a preset on-rate threshold.

6. The refrigerator according to claim 1, characterized in that: The controller is also configured to: when the refrigerator status data meets the fault condition of placing a hot object in the refrigerating chamber, if the refrigerator meets the defrost condition, delay the defrost program for a second preset time period starting from determining that the refrigerator refrigeration time meets the defrost condition.

7. The refrigerator according to claim 6, characterized in that: The controller is also configured to: from the time it is determined that the refrigerator refrigeration time meets the defrost condition and the duration reaches the second preset time, if the temperature of the refrigeration chamber is within the normal refrigeration temperature range and the refrigerator still meets the defrost condition, control the refrigerator to execute the defrost program.

8. The refrigerator according to claim 6 or 7, characterized in that: The controller is also configured to: within a third preset time period, if the number of times that the refrigerator status data meets the fault condition of placing hot objects in the refrigerating chamber reaches a threshold number, when the refrigerator meets the defrost condition again, control the refrigerator to directly execute the defrost program, wherein the third preset time period is greater than the second preset time period.

9. The refrigerator according to any one of claims 1 to 3 or 6 or 7, characterized in that: The box body is also configured with a temperature-changing chamber; The refrigeration system further comprises a variable temperature room heat exchange subsystem, and the variable temperature room heat exchange subsystem is used for heat exchange of the variable temperature room; The input port of the variable temperature chamber heat exchange subsystem, the input port of the refrigerating chamber heat exchange subsystem and the input port of the freezer chamber heat exchange subsystem are respectively connected to the output port of the condenser, the output port of the variable temperature chamber heat exchange subsystem is refluxed with the output port of the refrigerating chamber heat exchange subsystem and then input to the freezer chamber heat exchange subsystem, and the output port of the freezer chamber heat exchange subsystem is connected to the return air port of the compressor through a liquid reservoir.

10. The refrigerator according to any one of claims 1 to 3 or 6, characterized in that: The controller is also configured to determine the fault type of the user usage fault satisfied by the refrigerator status data through a bad fault diagnosis model, the bad fault diagnosis model takes the refrigerator status data as input and the fault type as output, and the fault type includes at least one of the refrigerator door not closed tightly, the freezer door not closed tightly and the hot object placed in the refrigerator.

11. The refrigerator according to claim 10, characterized in that: The controller is further configured to: when the refrigerator status data reaches a preset data amount, perform the fault type diagnosis through the bad fault diagnosis model.

12. The refrigerator according to claim 10, characterized in that: The controller is further configured to send a fault reminder message when the refrigerator status data meets any one of the fault conditions of the refrigerator door not being tightly closed, the freezer door not being tightly closed, and the hot object being placed in the refrigerator.

13. A method for controlling a refrigerator, characterized in that: include: Get refrigerator status data; When the refrigerator status data satisfies a refrigerating chamber door not tightly closed fault condition or a freezing chamber door not tightly closed fault condition, the operating frequency of the compressor is increased and / or the rotation speed of the fan is increased during the refrigeration stage of the freezing chamber.

14. The control method according to claim 13, characterized in that: The method further comprises: When the refrigerator status data satisfies the fault condition of placing a hot object in the refrigerating chamber, and the refrigerator satisfies the defrost condition, the defrost program is triggered after delaying for a second preset time period from the time when it is determined that the refrigerator satisfies the defrost condition.

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