Refrigerator and air door opening compensation control method

Abstract

The invention relates to a refrigerator and an air door opening degree compensation control method. The refrigerator comprises a refrigerator body internally provided with a storage chamber used for storing food materials; the air door assembly at least comprises an air door, and the air door assembly is arranged in the refrigeration air duct of the storage chamber and is configured to control the air outlet amount of the refrigeration air duct; the air door driving device is configured to drive the air door to open and close; the pressure borne by the pressure conversion assembly changes along with the change of the actual opening degree of the air door; the pressure sensor is configured to detect the pressure borne by the pressure conversion assembly; the controller is configured to send a control instruction to the air door assembly so as to control the air door to rotate based on the target opening value; the current pressure value output by the pressure sensor is obtained, and the actual opening value of the air door is determined according to the current pressure value; and under the condition that the deviation value between the actual opening value and the target opening value exceeds a preset deviation threshold value, compensation control is conducted on the actual opening of the air door. By adopting the refrigerator, the fresh-keeping effect of the refrigerator can be improved.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, and in particular to a refrigerator and a method for compensating and controlling the opening degree of the damper. Background Technology

[0002] Refrigerators are indispensable appliances in modern homes, maintaining the freshness and nutrition of food for extended periods through precise temperature control technology. In frost-free refrigerators, the air damper, as a key component for temperature regulation, directly determines the accuracy of cold air distribution, thus affecting the overall cooling effect and temperature stability of the storage compartment.

[0003] In traditional technology, dampers are typically controlled by a stepper motor and a gear transmission mechanism. The controller drives the stepper motor to rotate a specific number of steps, and then the gear transmission mechanism converts the rotational motion into the opening and closing action of the damper, thus theoretically enabling the setting of the damper position.

[0004] However, stepper motors can only execute rotation commands and cannot sense whether the damper has actually rotated to the predetermined position. When the damper becomes obstructed or loses steps during operation due to gear jamming, foreign object blockage, or low-temperature icing, the controller will assume that the damper has rotated to the predetermined position and continue working according to the original command. This will lead to uncontrolled temperature in the storage compartment, and the food in the storage compartment will easily spoil due to the uncontrolled temperature, thus seriously affecting the refrigerator's preservation effect. Summary of the Invention

[0005] This application provides a refrigerator and a method for compensating for the opening of the damper, in order to solve the problem of how to improve the preservation effect of the refrigerator.

[0006] In a first aspect, some embodiments provide a refrigerator, including:

[0007] The container has an internal storage compartment for storing food.

[0008] A damper assembly, including at least a damper, is disposed within a refrigeration duct of a storage compartment and is configured to control the airflow of the refrigeration duct.

[0009] The pressure conversion component experiences pressure that varies with the actual opening degree of the damper.

[0010] A pressure sensor is configured to detect the pressure applied to the pressure conversion assembly;

[0011] The controller is configured as follows:

[0012] Send control commands to the damper assembly to control the damper to rotate based on the target opening value;

[0013] Obtain the current pressure value output by the pressure sensor, and determine the actual opening value of the damper based on the current pressure value;

[0014] If the deviation between the actual opening value and the target opening value exceeds the preset deviation threshold, the actual opening of the damper is compensated and controlled.

[0015] Technical Effects: During the damper opening and closing control process, the controller first sends control commands to the damper assembly to control the damper to rotate based on the target opening value. During the damper's rotation, the pressure conversion component linked to the damper converts its actual opening change into a corresponding pressure change. This pressure change is detected in real time by a high-precision pressure sensor and fed back to the controller, enabling the controller to accurately calculate the actual opening value of the damper and achieve real-time perception of the damper's position. Subsequently, the controller compares the actual opening value with the target opening value. If the deviation exceeds a preset deviation threshold, it automatically triggers compensation control of the damper opening, forming a complete closed-loop control. Thus, by introducing a pressure feedback-based closed-loop control mechanism, the controller can perceive the actual opening of the damper, actively identify and compensate for motion abnormalities caused by gear jamming, obstruction by foreign objects, or icing. This effectively overcomes the technical deficiency of stepper motor open-loop control, which cannot detect the actual position of the damper, improving the accuracy and reliability of damper opening and closing control, avoiding temperature abnormalities caused by damper malfunction, and significantly improving the refrigerator's cooling stability and food preservation effect.

[0016] Secondly, some embodiments also provide a damper opening compensation control method, applied to the refrigerator provided in the first aspect, the method comprising:

[0017] Send control commands to the damper assembly to control the damper to rotate based on the target opening value;

[0018] Obtain the current pressure value, and determine the actual opening value of the damper based on the current pressure value. The current pressure value is the pressure on the pressure conversion component, and the pressure on the pressure conversion component changes with the actual opening of the damper.

[0019] If the deviation between the actual opening value and the target opening value exceeds the preset deviation threshold, the actual opening of the damper is compensated and controlled.

[0020] Technical Effects: During the damper opening and closing control process, the controller first sends control commands to the damper assembly to control the damper to rotate based on the target opening value. During the damper's rotation, the pressure conversion component linked to the damper converts its actual opening change into a corresponding pressure change. This pressure change is detected in real time by a high-precision pressure sensor and fed back to the controller, enabling the controller to accurately calculate the actual opening value of the damper and achieve real-time perception of the damper's position. Subsequently, the controller compares the actual opening value with the target opening value. If the deviation exceeds a preset deviation threshold, it automatically triggers compensation control of the damper opening, forming a complete closed-loop control. Thus, by introducing a pressure feedback-based closed-loop control mechanism, the controller can perceive the actual opening of the damper, actively identify and compensate for motion abnormalities caused by gear jamming, obstruction by foreign objects, or icing. This effectively overcomes the technical deficiency of stepper motor open-loop control, which cannot detect the actual position of the damper, improving the accuracy and reliability of damper opening and closing control, avoiding temperature abnormalities caused by damper malfunction, and significantly improving the refrigerator's cooling stability and food preservation effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This application provides structural schematic diagrams of refrigerators for some embodiments.

[0023] Figure 2 Hardware configuration block diagrams of refrigerators provided in some embodiments of this application;

[0024] Figure 3 This application provides structural schematic diagrams of dampers for some embodiments.

[0025] Figure 4 This is a schematic diagram of the gear drive structure provided in some embodiments of this application;

[0026] Figure 5 A flowchart illustrating the process of implementing damper opening compensation control in some embodiments of this application;

[0027] Figure 6 This is an assembly diagram of a pressure conversion assembly provided in some embodiments of this application;

[0028] Figure 7 This is a schematic diagram of the structure of a pressure conversion assembly provided in some embodiments of this application;

[0029] Figure 8 A schematic diagram illustrating the working process of the pressure conversion component provided in some embodiments of this application;

[0030] Figure 9 An assembly diagram of a pressure conversion assembly provided for other embodiments of this application;

[0031] Figure 10 This is a flowchart illustrating the method for implementing damper opening compensation control provided in some embodiments of this application. Detailed Implementation

[0032] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0033] To make the objectives and implementation methods of this application clearer, exemplary embodiments of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments. Obviously, the described exemplary embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0035] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0036] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0037] The term "module" refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0038] See Figure 1 This is a schematic diagram of the structure of a refrigerator provided in an embodiment of the present invention. The present invention provides a refrigerator 10, including a cabinet 11. The storage space inside the cabinet 11 can be divided into multiple storage compartments 12. Depending on their purpose, the storage compartments 12 can be configured as refrigerator compartments, freezer compartments, and variable temperature compartments, for storing items requiring preservation or freezing. Each storage compartment 12 may correspond to one or more doors, for example, in… Figure 1 The upper storage space features double doors, which can be pivotally mounted at the opening of the cabinet; the drawer storage compartment can be opened in a drawer-style manner to achieve drawer-style storage.

[0039] A refrigerator also includes a refrigeration system, which performs the refrigeration operation.

[0040] It should be noted that the refrigerator operates through a refrigeration system, providing cooling capacity to the storage compartment to maintain it at a constant low temperature. Specifically, the refrigeration system of the refrigerator in this embodiment of the invention consists of a compressor, a condenser, a throttling device, and an evaporator. The refrigeration process of the system includes compression, condensation, throttling, and evaporation processes.

[0041] During the refrigeration process, low-temperature, low-pressure refrigerant enters the compressor, where it is compressed into a high-temperature, high-pressure refrigerant gas, which is then discharged. The discharged refrigerant gas flows into the condenser, where it condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0042] The throttling device causes the high-temperature, high-pressure liquid refrigerant formed in the condenser to expand into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant that has expanded in the throttling device and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves a cooling effect by exchanging heat with the material to be cooled through the latent heat of refrigerant evaporation. In this embodiment, the evaporator exchanges heat with air to form air for cooling the storage compartment, thereby cooling the storage compartment. The throttling device can be a capillary tube.

[0043] A filter can also be installed downstream of the condenser. The filter is used to filter impurities in the refrigerant, improve the heat exchange efficiency of the refrigeration unit, and reduce the risk of pipe blockage.

[0044] A liquid receiver can also be installed on the suction side of the compressor. The liquid receiver is used to separate the refrigerant into gas and liquid phases. The liquid receiver is a shell-shaped component. The gas-liquid mixed refrigerant fluid enters the liquid receiver for basic phase separation. The gas enters the gas passage and is separated into droplets by gravity sedimentation. The liquid enters the liquid space and is separated into bubbles. The gas flows out from the gas outlet and is drawn into the compressor, avoiding liquid carryover in the compressor and extending the compressor's service life.

[0045] The compressor and condenser can be located at the lower rear of the housing, and the evaporator can be located at the rear of the housing corresponding to the storage compartment. The evaporator and condenser can also be arranged in other locations according to the industrial design of the housing 11, which will not be listed here. The location where the evaporator is located has sufficient space to allow air to flow. The air is driven by a fan to deliver the air generated by the evaporator for cooling the storage compartment to the target location and to draw in air from the storage compartment, forming an air circulation. In one or more embodiments of this application, the fan may include a refrigeration fan and a freezer fan. In some embodiments, the fan may also be configured in conjunction with the condenser.

[0046] Figure 2 Provided for some embodiments of this application Figure 1 Hardware configuration block diagram of the medium-sized refrigerator 10.

[0047] In some embodiments, the refrigerator 10 may include at least one of the following: a damper assembly 210, a communication device 220, a detector 230, a refrigeration system 240, a controller 250, a memory, a power supply, and a user input interface.

[0048] In some embodiments, detector 230 is used to acquire signals from the external environment or signals interacting with the outside world. For example, detector 230 includes a pressure sensor, a temperature sensor, etc. The pressure sensor can be used to detect the pressure applied to the pressure conversion component.

[0049] In some embodiments, the communication device 220 is a component used to communicate with a first external device or server 400 according to various communication protocol types. The refrigerator 10 may be equipped with multiple communication devices 220 depending on the supported communication methods. For example, when the refrigerator 10 supports wireless network communication, it may be equipped with a communication device 220 that includes WiFi functionality. When the refrigerator 10 supports Bluetooth connection communication, it needs to be equipped with a communication device 220 that includes Bluetooth functionality.

[0050] In some embodiments, a display may be provided on the housing 11, and the display is configured to show a human-computer interaction interface.

[0051] In some embodiments, the controller 250 may include a processor and a first to an nth interface for input or output. The controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 controls the overall operation of the refrigerator 10.

[0052] In some embodiments, a refrigerator is provided, the refrigerator comprising:

[0053] The container has an internal storage compartment for storing food.

[0054] A damper assembly, including at least a damper, is disposed within a refrigeration duct of a storage compartment and is configured to control the airflow of the refrigeration duct.

[0055] The pressure conversion component experiences pressure that varies with the actual opening degree of the damper.

[0056] A pressure sensor is configured to detect the pressure applied to the pressure conversion assembly;

[0057] The controller is configured as follows:

[0058] Send control commands to the damper assembly to control the damper to rotate based on the target opening value;

[0059] Obtain the current pressure value output by the pressure sensor, and determine the actual opening value of the damper based on the current pressure value;

[0060] If the deviation between the actual opening value and the target opening value exceeds the preset deviation threshold, the actual opening of the damper is compensated and controlled.

[0061] The storage room is equipped with a refrigeration duct, which connects the storage room to the evaporator. The refrigeration duct can transfer the cold energy generated by the evaporator to the storage room.

[0062] The cooling duct is also equipped with a damper assembly. The damper assembly includes at least a damper and may also include a damper drive device.

[0063] A damper can refer to a movable component installed in a refrigeration duct. By changing its opening degree, the amount of cold air delivered into the storage room through the refrigeration duct can be adjusted, thereby achieving temperature control of the storage room.

[0064] The damper is also equipped with a damper drive device. The damper drive device can refer to the actuator that drives the damper to move.

[0065] In some embodiments, the damper drive device may include a stepper motor and a drive gear. The drive gear is fixed on the rotating shaft of the stepper motor and meshes with a damper gear at one end of the damper. The stepper motor drives the damper gear to rotate through the drive gear, thereby driving the damper to rotate, so as to adjust the damper opening and change the air volume of the cooling duct.

[0066] In some embodiments, such as Figure 3 and Figure 4 As shown, the damper includes a screw 301, a damper cover 302, a damper bracket 303, a damper panel 304, and a gear drive structure 305. The gear drive structure 305 includes a damper drive device, a reduction gear assembly 308, a panel drive gear 309, a panel connecting gear assembly 310, and a connecting pin 311. The damper drive device includes a stepper motor 306 and a drive gear 307. The panel connecting gear assembly 310 is fixed to a rotating mechanism 315 or a damper shaft connected to the connecting pin 311. When the stepper motor 306 operates, it transmits power to the panel drive gear 309 and the panel connecting gear assembly 310 via the drive gear 307 and the reduction gear assembly 308. The panel drive gear 309 and the panel connecting gear assembly 310 drive the connecting pin 311 to rotate, thereby driving the damper panel 304 to rotate.

[0067] The stepper motor 306 can control the opening and closing of the damper panel by rotating forward or backward. The reduction gear assembly 308 is for illustration only; the actual product may have zero or more reduction gears, which can be determined according to the actual product needs or test results. This embodiment does not impose any restrictions on this.

[0068] The pressure conversion component senses the actual opening degree of the damper and converts the change in the actual opening degree into a pressure change. The converted pressure change can be detected by a pressure sensor, thereby allowing the actual opening value of the damper after opening and closing control to be deduced.

[0069] As an example, the pressure conversion assembly may include a mechanical structure with a variable thickness profile, such as an inclined plane or an annular component with unequal height. The pressure conversion assembly is elastically linked to the pressure sensor. Thus, when the damper opening changes, the damper moves the connecting part on the mechanical structure with the variable thickness profile, and the thickness at the contact point between the connecting part and the pressure sensor changes accordingly, thereby changing the pressure applied to the pressure sensor.

[0070] As another example, the pressure conversion assembly may include a variable-volume chamber structure. When the damper is open, the push rod advances into the chamber, compressing the gas and increasing the pressure inside; when the damper is closed, the push rod retracts via a spring or diaphragm, increasing the chamber volume and decreasing the pressure. A pressure sensor can detect the pressure changes inside the chamber through a duct and output a corresponding pressure signal.

[0071] In some embodiments, such as Figure 4 As shown, the refrigerator also includes an opening degree detection module, which includes a pressure sensor 313, an elastic element 314, and a pressure conversion assembly. The pressure conversion assembly includes a rotating mechanism 315, a connecting part 316, and a pressure conversion component 317. The elastic element 314 can be a spring. The rotating mechanism 315 is connected to the connecting pin 311, and the connecting part 316 is fixed to the rotating mechanism 315. When the door panel connecting gear assembly 310 drives the connecting pin 311 to rotate, the rotating mechanism 315 rotates synchronously with the connecting pin 311 and drives the connecting part 316 to rotate. During the rotation, the connecting part 316 generates pressure on the pressure conversion component 317. At the same time, the pressure conversion component 317 transmits the pressure to the pressure sensor 313 through the elastic element 314. The pressure sensor converts the physical signal into an electrical signal and transmits it to the controller. The controller uses the detected pressure to deduce the actual opening value of the damper, thus achieving closed-loop control.

[0072] In some other embodiments, the pressure conversion component 317 itself can be made of an elastic material. In this case, the opening detection module does not need to be equipped with an elastic element 314, and an elastic connection with the pressure sensor can still be achieved.

[0073] The control commands sent by the controller to the damper drive can refer to electrical signals or data commands used to drive the damper drive to complete specific actions. As an example, when the damper drive is a stepper motor, the control command can be a series of pulse signals, each pulse signal corresponding to a fixed angle of rotation of the stepper motor rotor. This fixed angle is called the step angle, and the number of pulses determines the total rotation angle of the motor.

[0074] The target opening value can refer to the theoretical opening angle or position that the damper needs to achieve. The target opening value can be expressed as a percentage, angle, or the number of steps of the stepper motor. The target opening value can be calculated by the controller based on the difference between the current temperature of the storage compartment and the set temperature; this embodiment does not impose any restrictions on this.

[0075] The current pressure value can refer to the physical quantity that the pressure sensor detects at a certain moment, reflecting the magnitude of the mechanical pressure applied to its sensing surface.

[0076] A definite correspondence exists between the pressure value detected by the pressure sensor and the actual opening value of the damper. This correspondence can be determined in advance through experimental testing, generating a pressure-opening mapping table or fitting a characteristic curve equation, and storing it in the controller's memory. During the actual operation of the refrigerator, when the actual opening value of the damper needs to be determined, the controller can read the real-time detection value of the pressure sensor and convert it into the corresponding actual opening value of the damper by looking up a table or calculation. This process achieves indirect but accurate sensing of the mechanical position of the damper, providing reliable status feedback for closed-loop control.

[0077] Compensation control refers to the process by which the controller recalculates and sends supplementary pulse commands to the damper drive device to correct the damper position when it detects that the damper opening has not reached the expected target.

[0078] As an example, the method for compensating and controlling the actual opening of the damper may include: determining the displacement of the damper during the compensation control process based on the deviation between the actual opening value and the target opening value; when the actual opening value is greater than the target opening value, sending a first compensation control command to the damper drive device to instruct the damper drive device to drive the damper to rotate in a preset damper closing direction according to the displacement; when the actual opening value is less than the target opening value, sending a second compensation control command to the damper drive device to instruct the damper drive device to drive the damper to rotate in a preset damper opening direction according to the displacement.

[0079] As another example, the method for compensating and controlling the actual opening of the damper may include: when the actual opening value is greater than the target opening value, sending a first compensation control command to the damper drive device to instruct the damper drive device to rotate the damper in a preset damper closing direction by a preset displacement, returning to the step of obtaining the current pressure value output by the pressure sensor, until the deviation between the actual opening value and the target opening value does not exceed a preset deviation threshold, or until the deviation between the actual opening value and the target opening value remains unchanged for M consecutive times; when the actual opening value is less than the target opening value, sending a second compensation control command to the damper drive device to instruct the damper drive device to rotate the damper in a preset damper opening direction by a preset displacement, returning to the step of obtaining the current pressure value output by the pressure sensor, until the deviation between the actual opening value and the target opening value does not exceed a preset deviation threshold, or until the deviation between the actual opening value and the target opening value remains unchanged for M consecutive times. M can be determined based on actual conditions or test results, such as 1 time, 3 times, 5 times, etc., and this embodiment does not limit this. The preset displacement can be determined based on the preset deviation threshold. For example, if the preset deviation threshold is N steps, the preset displacement can also be N steps. Each time, N steps are compensated, and the control is continuously looped until the deviation between the actual opening value and the target opening value does not exceed the preset deviation threshold, or until the deviation between the actual opening value and the target opening value has not changed for M consecutive times.

[0080] If the deviation between the actual opening value and the target opening value remains unchanged for M consecutive times, the refrigerator can be determined to be in an abnormal cooling state. In this case, you can first stop trying to drive the damper to rotate and instead approach the refrigerator to detect the abnormal cooling.

[0081] As an example, the storage compartment can be briefly heated by turning off the refrigeration system or by executing a defrosting procedure. If the damper or gear is frozen or stuck by ice crystals, the damper may return to normal operation after the brief heating or defrosting.

[0082] As another example, alarm information can be sent to user terminals and servers, or displayed through alarm modules such as warning lights, displays, and speakers on the refrigerator to prompt users and maintenance personnel to carry out timely repairs.

[0083] In some embodiments, such as Figure 5As shown, the controller can first determine the target opening value of the damper based on the current temperature requirement of the storage compartment by looking up a table or calculating it. Based on this target opening value, it generates a corresponding pulse sequence and sends it to the damper drive device. Upon receiving the pulse signal, the damper drive device rotates a corresponding number of steps under the drive of the pulse signal, and drives the damper to rotate via a gear transmission mechanism. Under normal circumstances, the damper will rotate to the target opening value. However, if the damper experiences resistance or loses steps during operation due to gear jamming, obstruction by foreign objects, or low-temperature icing, the damper will not rotate to the target opening value, and the actual opening value of the damper may be less than or greater than the target opening value.

[0084] During the movement of the damper, the pressure conversion component can sense the actual opening change of the damper and convert it into a pressure change. The pressure sensor can detect the current pressure value generated after conversion by the pressure conversion component in real time or by trigger and send it to the controller. The trigger condition for the pressure sensor can be a pressure detection command sent by the controller. After the damper drive device completes the drive, it can return a feedback command indicating that the drive is complete to the controller. After receiving the feedback command, the controller can send a pressure detection command to the damper.

[0085] After receiving the current pressure value, the controller can map the current pressure value to the actual opening value by querying the pressure-opening correspondence pre-stored in the memory, thereby achieving accurate perception of the actual opening of the damper.

[0086] Furthermore, the controller can calculate the deviation between the actual opening value and the target opening value, and compare the deviation value with a preset deviation threshold. If the deviation value exceeds the preset deviation threshold, it is determined that the damper is not in position, and the controller starts compensation control to drive the damper again until the actual opening meets the requirements. If the deviation value does not exceed the preset deviation threshold, it is determined that the damper is operating normally and no other operation is required.

[0087] As an example, if the deviation still exists after multiple compensations, the refrigeration system can be turned off to briefly raise the temperature of the storage compartment, or a defrosting procedure can be executed. If the damper or gear is frozen or stuck by ice crystals, the damper may return to normal operation after a brief temperature rise or defrosting.

[0088] As another example, if the deviation still exists after multiple compensations, an alarm message can be sent to the user terminal and server, or the alarm message can be displayed through alarm modules such as warning lights, displays, and speakers on the refrigerator to prompt users and maintenance personnel to carry out timely repairs.

[0089] In this embodiment, during the damper opening and closing control process, the controller first sends a control command to the damper assembly to control the damper to rotate based on the target opening value. During the damper rotation, the pressure conversion component linked to the damper converts its actual opening change into a corresponding pressure change. This pressure change is detected in real time by a high-precision pressure sensor and fed back to the controller, enabling the controller to accurately calculate the actual opening value of the damper and achieve real-time perception of the damper position. Subsequently, the controller compares the actual opening value with the target opening value. If the deviation exceeds a preset deviation threshold, it automatically triggers compensation control of the damper opening, forming a complete closed-loop control. In this way, by introducing a pressure feedback-based closed-loop control mechanism, the controller can perceive the actual opening of the damper, actively identify and compensate for motion abnormalities caused by gear jamming, obstruction by foreign objects, or icing, effectively overcoming the technical defects of stepper motor open-loop control that cannot know the actual position of the damper. This improves the accuracy and reliability of damper opening and closing control, avoids temperature abnormalities caused by damper malfunction, and thus significantly improves the refrigerator's cooling stability and food preservation effect.

[0090] In some embodiments, such as Figure 6 and Figure 7 As shown, the pressure conversion component includes:

[0091] The rotating mechanism 315 is connected to the door panel of the damper and is configured to rotate synchronously with the damper;

[0092] The connecting part 316 includes a fixed end and an overlapping section. The fixed end is fixed to the rotating mechanism 315, and the overlapping end overlaps with the pressure conversion component 317. During the process of the connecting part rotating with the rotating mechanism 315, the contact point between the overlapping end and the pressure conversion component 317 changes, and the pressure applied by the overlapping end to the pressure conversion component 317 at different contact points is different.

[0093] The pressure conversion component 317 is elastically connected to the pressure sensor 313 and is configured to transmit the pressure applied by the connection 316 to the pressure sensor 313.

[0094] It should be noted that the pressure conversion component, which converts the damper opening and pressure through changes in air pressure or hydraulic pressure, requires a highly airtight sealed cavity. Any tiny leak will cause pressure decay, resulting in permanent inaccurate readings. Furthermore, the fault is difficult to diagnose and repair. In addition, the overall structure and manufacturing process are relatively complex, making it difficult to install in the compact refrigerator air duct, and often requiring a large dedicated space.

[0095] The rotating mechanism can be a component or coupling coaxially fixed to the damper shaft. It can be fixedly mounted on the damper shaft and rigidly connected to the damper panel. When the damper drive unit rotates the damper, the rotating mechanism rotates synchronously, ensuring its rotation angle matches the damper opening. The rotating mechanism can be made of materials such as plastic or metal, possessing sufficient structural strength to transmit motion. The panel connecting gear assembly is fixed to the rotating mechanism or the damper shaft, thus driving the rotating mechanism and damper shaft to rotate synchronously under the drive of the damper drive unit.

[0096] The connecting part can be a rigid connecting rod or a pressure arm structure. The two ends of the connecting part serve as a fixed end and an overlapping end, respectively. The fixed end can refer to a section fixed to the rotating mechanism by means of clips, screws, or integral molding, while the overlapping end can refer to a section overlapping the pressure conversion component by means of sliding or rolling contact. During the opening and closing of the damper, the fixed end of the connecting part drives the connecting part to rotate synchronously with the rotating mechanism, while the overlapping end moves along the surface of the pressure conversion component during its rotation with the connecting part, or the pressure conversion component moves along the surface of the overlapping end during its rotation with the connecting part.

[0097] By designing the shape or structure of at least one of the connecting part and the pressure conversion component, the pressure applied to the pressure conversion component at different moving points at the overlapping end can be different, thereby enabling the pressure conversion component to convert different damper openings into different pressure values.

[0098] As an example, the pressure conversion component can be an annular or arc-shaped structure with a variable thickness outer contour. The thickness of the pressure conversion component varies at different contact points, thus the pressure applied to the pressure conversion component by the connecting portion also varies.

[0099] As another example, the connector can be an annular or arc-shaped structure with a variable thickness outer contour. The thickness of the connector varies at different contact points, thus resulting in different pressures exerted by the connector on the pressure conversion component.

[0100] The pressure conversion component is elastically connected to the pressure sensor, thereby transmitting the pressure applied by the connection to the sensing surface of the pressure sensor.

[0101] As an example, the pressure conversion component can be a ring-shaped or arc-shaped structure with a variable thickness outer contour. Its bottom surface is connected to the pressure sensor via an elastic element to form an elastic contact. The pressure conversion component can be fixed to a fixed structure such as the refrigerator body or air duct bracket, and does not rotate with the air duct. When the connecting part moves on the surface of the pressure conversion component, the pressure it applies is transmitted to the elastic element through the pressure conversion component, and the elastic element then evenly transmits the pressure to the sensing surface of the pressure sensor.

[0102] As another example, the pressure conversion component itself can be made of an elastic material. In this case, when the connection moves on the surface of the pressure conversion component, the pressure it applies can be directly transmitted to the sensing surface of the pressure sensor through the pressure conversion component.

[0103] In this embodiment, the pressure conversion component adopts a fully mechanical structure design. Through the mechanical linkage of the rotating mechanism, connecting part, and pressure conversion component, the damper opening is directly converted into mechanical pressure, which is detected by a pressure sensor. Its purely mechanical transmission structure is insensitive to changes in ambient temperature and can maintain stable output even under high humidity and low temperature fluctuations inside the refrigerator, exhibiting strong anti-interference capabilities, thus improving the reliability of the pressure conversion component. Furthermore, the shape and size of the rotating mechanism, connecting part, and pressure conversion component can be adjusted according to the refrigerator's air duct structure, making the overall structure of the pressure conversion component compact and simple, occupying less space, and easily integrated into narrow air duct structures. This makes it more suitable for the comprehensive requirements of household appliances for reliability, miniaturization, and maintainability.

[0104] In some embodiments, the pressure conversion component is an arc-shaped member coaxially arranged with the rotating mechanism, the connecting portion overlaps on the first bottom surface of the arc-shaped member, and the second bottom surface of the arc-shaped member is elastically connected to the pressure sensor; the arc-shaped member has different thicknesses along the axial direction at at least some different positions in the circumferential direction.

[0105] The pressure conversion component is an arc-shaped component coaxially arranged with the rotating mechanism. Its overall shape is arc or ring, and its central axis coincides with the rotating mechanism and the damper shaft, ensuring that its angular characterization is synchronously aligned with the rotation angle of the damper.

[0106] The arc-shaped component includes two bottom surfaces, an upper and a lower one. The first bottom surface can refer to the bottom surface of the pressure conversion component facing the rotating mechanism, which is used for overlapping contact with the connecting part. The second bottom surface can refer to the other bottom surface of the pressure conversion component opposite to the first bottom surface, which is used for connection with the pressure sensor.

[0107] The fixed end of the connecting part is fixed to the rotating mechanism, and the overlapping end overlaps on the first bottom surface of the arc-shaped component by sliding or rolling. When the damper rotates under the drive of the damper drive device, the rotating mechanism drives the connecting part to rotate synchronously, and the overlapping end of the connecting part moves circumferentially along the first bottom surface.

[0108] The first and second bottom surfaces are not parallel, meaning the thickness of the arc-shaped component along the axial direction is not uniform, and the distance between the first and second bottom surfaces is not uniformly distributed in the circumferential direction. Furthermore, the thickness of the arc-shaped component along the axial direction varies at at least some different locations in the circumferential direction.

[0109] As an example, such as Figures 7 to 9As shown, the pressure conversion component 317 is an arc-shaped member. The thickness of the arc-shaped member along the axial direction gradually increases from one end to the other, and its circumference unfolds into a trapezoidal shape in the plane. Therefore, when the connecting part 316 moves on the first bottom surface of the pressure conversion component 317 with the rotating mechanism 315, its position is different, and the corresponding thickness of the arc-shaped member along the axial direction is different, which causes the pressure applied to the pressure sensor 313 below the second bottom surface of the pressure conversion component 317 to change accordingly.

[0110] As an example, when the damper is closed, the connecting part overlaps at a preset initial position on the first bottom surface; when the damper is open, the circumferential distance from the contact point between the overlapping end and the pressure conversion component to the preset initial position is positively correlated with the opening value of the damper; the axial thickness of the arc-shaped component at the contact point is positively correlated with the circumferential distance from the contact point to the preset initial position.

[0111] The second bottom surface is elastically connected to the sensing surface of the pressure sensor via an elastic element. The elastic element may include a spring, rubber pad, silicone layer, or metal spring, etc. This elastic connection structure can not only buffer instantaneous impacts and extend the sensor's lifespan, but also ensure uniform pressure transmission and avoid local stress concentration.

[0112] In this embodiment, compared to pressure conversion components with square or non-circular contours, the arc-shaped component can naturally match the rotational trajectory of the damper, resulting in a more compact structural layout and effectively reducing radial and axial space occupation. This is particularly suitable for space-constrained installation environments such as refrigerator air ducts. Secondly, the arc-shaped component exhibits a good linear or monotonic correspondence between circumferential angle changes and thickness changes, ensuring that the pressure applied to the connection during rotation changes smoothly and continuously with the rotation angle. This helps simplify the mapping relationship between damper opening and output pressure. Furthermore, compared to methods relying on the elastic deformation of the pressure conversion component itself, elastic elements offer higher reliability and long-term stability.

[0113] In some embodiments, after compensating for the actual opening of the damper, the controller is further configured to perform the following steps:

[0114] Count the number of compensation controls to determine the cumulative number of compensation controls;

[0115] If the cumulative number of times is less than or equal to the preset counting threshold, return to the step of obtaining the current pressure value output by the pressure sensor until the deviation between the actual opening value and the target opening value does not exceed the preset deviation threshold, or until the cumulative number of times is greater than the preset counting threshold.

[0116] If the cumulative number of counts exceeds a preset threshold, the refrigerator is determined to be in an abnormal cooling state.

[0117] It should be noted that during the control process, if sudden abnormalities occur such as a stepper motor malfunction or a control signal interruption, the deviation can usually be corrected through compensatory control, allowing the damper to eventually rotate to the target opening. However, if the damper experiences resistance or severe step loss due to mechanical failure, such as gear jamming, obstruction by foreign objects, or freezing, its rotation mechanism is physically restricted. In this case, even if compensatory control is activated and drive commands are repeatedly sent, the damper will still struggle to overcome the physical obstacle.

[0118] The cumulative number of times can refer to the total number of times compensation control is performed on the same abnormal event.

[0119] In some embodiments, the cumulative count can be reset to zero if the deviation between the actual opening value and the target opening value does not exceed a preset deviation threshold.

[0120] In some embodiments, the cumulative count can be reset to zero if the refrigerator is determined to be in an abnormal cooling state.

[0121] An abnormal cooling condition can refer to a refrigerator's temperature control failure caused by the damper not opening or closing properly, resulting in the inability to distribute cold air as needed.

[0122] As an example, if the refrigerator is determined to be in an abnormal cooling state, a preset cooling malfunction control program can be executed. Exemplarily, the preset cooling malfunction control program may include: shutting down the cooling system within a preset time range, or executing a defrosting program, etc. If the damper or gears are frozen or stuck by ice crystals, the damper may return to normal operation after a brief warm-up or defrosting.

[0123] As another example, if it is determined that the refrigerator is in an abnormal cooling state, alarm information can be sent to the user terminal and the server, or the alarm information can be displayed through alarm modules such as warning lights, displays, and speakers on the refrigerator to prompt users and maintenance personnel to carry out repairs in a timely manner.

[0124] In some embodiments, the controller may have an internal counter to record the number of times compensation control is triggered. Each time the compensation control process is entered and completed, the counter value automatically increments by a preset number. For example, the preset number can be 1. The controller can determine the cumulative number of compensation controls executed by reading the current value of the counter. The controller compares the current cumulative number with a preset counting threshold. If the cumulative number is less than or equal to the preset counting threshold, the controller returns to the step of obtaining the current pressure value output by the pressure sensor and checks again whether the deviation between the actual opening value and the target opening value of the damper has been reduced to within the preset deviation threshold. This process is repeated until the deviation between the actual opening value and the target opening value does not exceed the preset deviation threshold, or until the cumulative number exceeds the preset counting threshold. If the deviation between the actual opening value and the target opening value does not exceed the preset deviation threshold, it indicates that the damper has reached the target opening and no further compensation is needed. If the cumulative number exceeds the preset counting threshold, it indicates that multiple compensation controls have failed to bring the damper to the target opening, and the damper may be unable to operate due to mechanical failures such as gear jamming, foreign object obstruction, or icing. At this point, the controller stops sending drive commands and instead executes fault determination logic, marking the air conditioner as having an abnormal cooling state.

[0125] In this embodiment, by re-detecting the opening value after compensation control to confirm its effectiveness, and by repeatedly performing compensation control if the damper fails to reach the target opening, sudden opening abnormalities caused by unforeseen anomalies can be effectively resolved. Furthermore, by setting a counting threshold for the number of compensation control attempts, it is possible to reasonably distinguish between sudden opening abnormalities caused by unforeseen anomalies and cooling abnormalities caused by mechanical malfunctions. When the cumulative number of compensation attempts exceeds the preset counting threshold, the refrigerator is promptly determined to be in a cooling abnormality state, thus avoiding unnecessary energy consumption.

[0126] In some embodiments, after determining that the refrigerator is in an abnormal cooling state, the controller is further configured to:

[0127] Begin the first timing;

[0128] When the first timer reaches the preset initialization time threshold, the damper assembly is initialized, and the process of sending control commands to the damper assembly is resumed until the deviation between the actual opening value and the target opening value does not exceed the preset deviation threshold.

[0129] It should be noted that when the damper or drive gears experience refrigeration abnormalities due to icing or ice crystal blockage, the ice inside the refrigerator may melt naturally over time as the internal temperature rises. Simultaneously, the controller may have already executed its refrigeration abnormality control program, or the user or maintenance personnel may have taken intervention measures. However, even if the abnormality has actually been eliminated, the controller typically cannot automatically detect this change and restore damper control, remaining in an abnormal refrigeration state. In this case, manual intervention is usually required, such as power-off restart or manual reset. This is not only cumbersome but also requires the user or maintenance personnel to wait for the abnormality to resolve, causing unnecessary inconvenience and wasted time.

[0130] The first timer can refer to an independent timer started inside the controller to record the time elapsed since the moment the cooling malfunction was detected.

[0131] In some embodiments, the first timer can be reset to zero each time a preset initialization time threshold is reached.

[0132] In other embodiments, the first timer can be reset each time the damper drive is initialized.

[0133] The preset initialization time threshold refers to the pre-set interval for attempting to initialize the damper assembly. This can be determined based on actual conditions and test results, and this embodiment does not impose any limitations on it. As an example, the preset initialization time threshold can be 20 minutes.

[0134] Initializing the damper assembly can refer to performing a reset or restart operation on the damper drive device to restore it to its initial working state and clear any possible drive errors or out-of-synchronization states.

[0135] In some embodiments, after the controller determines that the refrigerator is in an abnormal cooling state, an internal timer can be immediately started to begin the first timing. This timer operates based on the controller's real-time clock or system clock, incrementing in seconds or minutes to monitor the duration of the abnormal state. When the current value of the first timing reaches a preset initialization time threshold, the controller sends a reset command or a specific initialization pulse sequence to the damper drive device, resetting the damper drive device and driving the damper back to a preset initial position. After initialization is complete, the controller returns to the step of sending control commands to the damper assembly, re-driving the damper to the target opening value, and detecting whether the deviation between the actual opening value and the target opening value has been reduced to within a preset deviation threshold. This cycle continues until the deviation between the actual opening value and the target opening value of the damper is reduced to within the preset deviation threshold.

[0136] In this embodiment, for abnormal situations such as melting ice that require a certain amount of time to resolve automatically, the refrigerator, the user, or maintenance personnel only need to perform the corresponding defrosting operation. After the external obstacle is removed, the controller can automatically restore the normal regulation of the cooling duct through initialization. This significantly improves the self-healing capability and intelligence level of the equipment, and effectively reduces the time that users and maintenance personnel spend waiting for the ice to melt.

[0137] In some embodiments, the refrigerator includes a refrigeration system; after determining that the refrigerator is in an abnormal refrigeration state, the controller is further configured to:

[0138] The refrigeration system is paused, and the second timing begins.

[0139] When the second timer reaches the preset shutdown time threshold, the damper assembly is initialized and the refrigeration system is controlled to resume operation. The process returns to the step of sending control commands to the damper assembly until the deviation between the actual opening value and the target opening value does not exceed the preset deviation threshold.

[0140] It should be noted that when the damper cannot be properly positioned due to gear jamming, obstruction by foreign objects, or icing, the controller may identify it as an abnormal cooling state, but the refrigeration system, including the compressor and fan, will typically continue to operate. However, because the damper is not opening properly, cold air accumulates in the duct or is misallocated, resulting in wasted energy and potentially exacerbating icing or causing abnormal temperatures in other storage compartments. Furthermore, if the abnormal cooling leads to excessively low temperatures, it will only worsen the obstruction of the gears and damper. Repeatedly attempting to open the obstructed damper in this situation can easily lead to motor overheating or abnormal system pressure, posing a safety hazard.

[0141] The second timer can refer to an independent timer started inside the controller to record the time elapsed since the refrigeration system stopped running.

[0142] In some embodiments, the second timer can be reset to zero each time a preset stop time threshold is reached.

[0143] In some embodiments, the second timing and the first timing can be two different, independent timers.

[0144] The preset shutdown time threshold refers to the maximum duration for which the refrigeration system can be paused, and can be determined based on actual conditions and test results. This embodiment does not impose any restrictions on this. As an example, the preset initialization time threshold can be 20 minutes.

[0145] In some embodiments, after the controller determines that the refrigerator is in an abnormal cooling state, the controller can send a pause command to the cooling system to interrupt the cooling cycle, avoid ineffective distribution of cooling capacity or system overload, and immediately start an internal timer to begin a second timing. This timer runs based on the controller's real-time clock or system clock, incrementing in seconds or minutes to monitor the duration of the cooling system's pause. When the current value of the second timing reaches a preset stop time threshold, the controller can send a resume command to the cooling system to prevent the refrigerator temperature from becoming too high and food quality from deteriorating due to prolonged shutdown. The controller can also send a reset command or a specific initialization pulse sequence to the damper drive to reset the damper drive and drive the damper back to a preset initial position. After initialization, the controller returns to the step of sending control commands to the damper assembly, re-drives the damper to rotate to the target opening value, and checks whether the deviation between the actual opening value and the target opening value of the damper has been reduced to within a preset deviation threshold. This cycle continues until the deviation between the actual opening value and the target opening value of the damper is reduced to within the preset deviation threshold.

[0146] In this embodiment, by actively suspending the refrigeration system after determining an abnormal refrigeration state, not only is wasted cooling capacity and system overload avoided, but a time window for the naturally melting ice layer at the damper is also provided, increasing the probability of automatic resolution of the abnormality. When the abnormality can be automatically resolved by naturally melting the ice layer, the user does not need to perform any operation; the refrigerator can autonomously and systematically recover from the malfunction, greatly reducing manual intervention. Furthermore, automatic shutdown and initialization after determining an abnormal refrigeration state allows for more timely abnormal control, resolving the abnormality more promptly before the user or maintenance personnel notice it, reducing the time the refrigerator is in an abnormal state, and improving the refrigerator's preservation effect.

[0147] In some embodiments, during the process of compensating for the actual opening of the damper when the deviation between the actual opening value and the target opening value exceeds a preset deviation threshold, the controller is further configured to:

[0148] If the deviation between the actual opening value and the target opening value exceeds a preset deviation threshold, determine whether the refrigerator is currently in an abnormal cooling state.

[0149] If the refrigerator is not currently in an abnormal cooling state, the actual opening degree of the damper will be compensated and controlled.

[0150] If the refrigerator is currently experiencing a cooling malfunction, the preset defrosting program will be executed.

[0151] It should be noted that when a refrigerator is determined to be in an abnormal cooling state, the refrigerator itself, the user, or maintenance personnel may intervene to resolve the issue. During intervention, it is inevitable that the deviation between the actual opening value and the target opening value will be rechecked to see if it exceeds the preset deviation threshold. However, if compensation control continues under abnormal cooling conditions, it will not only fail to resolve the issue but may also exacerbate motor overload and accelerate component wear.

[0152] The preset defrost program can refer to a set of defrost processes pre-stored in the refrigerator design, and this embodiment does not limit this. As an example, the preset defrost program may include operations such as turning off the refrigeration system, turning on the defrost heater, and running the fan to remove moisture, in order to melt the ice layer on the evaporator or the damper area.

[0153] In some embodiments, the controller can calculate the deviation between the actual opening value and the target opening value, and compare this deviation with a preset deviation threshold. If the deviation exceeds the preset deviation threshold, it is determined that the damper is not in position. In this case, the controller first queries the refrigerator's status flag to determine whether the refrigerator is currently marked as being in an abnormal cooling state. If the controller detects that the refrigerator is not currently in an abnormal cooling state, it indicates that the damper deviation may be caused by a sudden abnormality, and the system is still within the normal control range. Therefore, the controller can initiate compensation control. If the controller detects that the refrigerator is currently in an abnormal cooling state, it indicates that the damper has already undergone multiple compensations and has not yet recovered, which may be due to serious faults such as gear jamming, foreign object obstruction, or icing, preventing it from operating. In this case, continuing to execute compensation control is not only ineffective but may also damage the motor. Therefore, the controller does not perform compensation but instead executes a preset defrosting program.

[0154] In some embodiments, during the execution of the preset defrosting program, the first timing can continue, that is, during the defrosting process, the controller can continuously attempt to drive the damper. If the deviation between the actual opening value and the target opening value does not exceed a preset deviation threshold, it indicates that the abnormality has been eliminated, and the preset defrosting program can be terminated.

[0155] In this embodiment, by determining whether the refrigerator is in an abnormal cooling state before compensation control, an intelligent hierarchical response of the control strategy is achieved. When the refrigerator is not in an abnormal state, the controller performs compensation control to attempt to correct deviations and resolve sudden anomalies; when the refrigerator is in an abnormal cooling state, ineffective drive is abandoned, and a preset defrosting program is executed instead, fundamentally eliminating common obstruction factors such as icing. In this way, energy waste and component damage caused by repeatedly driving the damper in an abnormal cooling state can be avoided, significantly improving the system's safety, energy efficiency, and self-healing capabilities.

[0156] In some embodiments, during the execution of a preset defrosting procedure, the controller is further configured to:

[0157] Determine the current temperature setpoint of the storage room, the current measured temperature of the storage room, and the defrosting interval between the last defrosting and the current time;

[0158] If the defrosting interval exceeds the preset interval threshold and the measured temperature is lower than the preset temperature threshold, the preset defrosting program is executed. The preset temperature threshold is higher than the set temperature value, and the temperature difference between the set temperature value and the preset temperature threshold is less than the preset temperature difference threshold.

[0159] It should be noted that defrosting too frequently, or defrosting when the storage room temperature is already high, will cause the storage room temperature to rise further, which may exceed the safe storage range for food, thereby causing food to spoil, dehydrate, or decline in quality.

[0160] The temperature setpoint can refer to the target operating temperature set by the user or the control system for the storage compartment, which is used to guide the refrigeration operation.

[0161] The measured temperature value refers to the current actual temperature of the storage compartment as detected in real time by the temperature sensor installed inside the refrigerator.

[0162] The defrosting interval can refer to the time interval from the end of the last defrosting procedure to the current moment.

[0163] The preset interval time threshold can refer to the minimum allowed interval time for defrosting, which is used to prevent defrosting from being too frequent. The specific interval can be determined according to the actual situation or test results, etc. This embodiment does not impose any restrictions on it.

[0164] The preset temperature threshold can refer to the maximum temperature value that will not cause the storage room temperature to exceed the safe storage range for food due to defrosting. The specific value can be determined according to the actual situation or test results, etc. This embodiment does not impose any restrictions on it.

[0165] As an example, you can test the temperature change that defrosting might cause in advance, and then subtract this temperature change from the maximum temperature value of the preset safe food storage range. The difference can then be used as the preset temperature threshold.

[0166] The preset temperature threshold can be higher than the set temperature value, but the temperature difference between the preset temperature threshold and the set temperature value should be less than the preset temperature difference threshold to avoid food spoilage due to excessive temperature difference.

[0167] As an example, the safe food storage range can be determined based on a temperature setpoint. The temperature difference between the maximum value of the safe food storage range and the temperature setpoint can be less than a preset temperature fluctuation value. The difference between this preset temperature fluctuation value and the temperature change caused by defrosting can be determined as a preset temperature difference threshold.

[0168] In some embodiments, during the execution of a preset defrosting program by the controller, the current temperature setpoint of the storage compartment, the current measured temperature of the storage compartment, and the defrosting interval between the last defrost and the current time can be read first through the communication interface between the storage unit and the sensor. Then, the defrosting interval is compared with a preset interval threshold, and a preset temperature threshold is determined based on the temperature setpoint and a preset temperature difference threshold. The measured temperature is then compared with the preset temperature threshold. If the defrosting interval exceeds the preset interval threshold and the measured temperature is lower than the preset temperature threshold, the preset defrosting program is executed. If at least one of the following conditions is not met: the defrosting interval exceeds the preset interval threshold, or the measured temperature is lower than the preset temperature threshold, the preset defrosting program is not executed; it can wait until both conditions are met before executing the preset defrosting program.

[0169] In this embodiment, by limiting both temperature and time interval, it is possible to avoid food deterioration caused by excessively high storage room temperature, and also to avoid excessive defrosting, thereby reducing unnecessary energy consumption.

[0170] In some embodiments, the refrigerator includes a cooling fan; when the defrosting interval exceeds a preset interval threshold and the measured temperature is lower than a preset temperature threshold, during the execution of a preset defrosting program, the controller is further configured to:

[0171] If the defrosting interval exceeds the preset interval threshold and the actual temperature is lower than the preset temperature threshold, the air cooler will be stopped and the preset defrosting program will be executed.

[0172] When the first timer reaches the preset fan start time, the air cooler is controlled to run at a preset duty cycle, and the preset fan start time is less than the preset initialization time threshold.

[0173] When the first timer reaches the preset initialization time threshold, the air cooler is controlled to stop running.

[0174] It should be noted that in current refrigerator defrosting control technology, the evaporative air cooler is usually completely shut off during defrosting and only restarted after defrosting is complete. However, if there is a lack of airflow during defrosting, heat can easily accumulate in localized areas, leading to uneven temperature distribution during defrosting. This heat concentration not only affects defrosting efficiency and reduces defrosting effectiveness, but may also expose some food to excessively high temperatures, causing thawing, spoilage, or deterioration in quality.

[0175] Among them, the evaporator can refer to the fan used to make the air inside the refrigerator flow through the evaporator for heat exchange, and it is usually located near the evaporator.

[0176] The preset fan start-up time refers to a time point set before a preset initialization time threshold is reached. This time point is used to start the evaporative cooler before initialization to improve the thermal distribution. The preset fan start-up time is less than the preset initialization time threshold, and the difference between the preset fan start-up time and the preset initialization time threshold is less than the preset time difference. As an example, the preset time difference can be 1 minute. In this way, the controller starts the evaporative cooler 1 minute before each initialization, using airflow to improve the thermal distribution and enhance the defrosting effect. If the abnormality is resolved after initialization, defrosting can also be stopped, avoiding unnecessary energy consumption.

[0177] The preset duty cycle can be lower than the normal duty cycle of the evaporative air cooler. As an example, assuming the normal duty cycle of the evaporative air cooler is 100%, the preset duty cycle can be 70%-90%, such as 70%, 80%, 90%, etc.

[0178] In some embodiments, the controller can compare the defrost interval duration with a preset interval duration threshold, determine a preset temperature threshold based on a set temperature value and a preset temperature difference threshold, and compare the measured temperature value with the preset temperature threshold. If the defrost interval duration exceeds the preset interval duration threshold and the measured temperature value is lower than the preset temperature threshold, the controller will stop the evaporative cooler and execute a preset defrost procedure. During this process, the first timer is continuously running. If the first timer reaches the preset fan start time during defrosting, the controller will operate the evaporative cooler with a preset duty cycle and continue the first timer; if the first timer reaches the preset initialization time threshold, the controller will stop the evaporative cooler and perform initialization control.

[0179] In this embodiment, by starting the cold air fan with a preset duty cycle before the first timer reaches the preset initialization time threshold, the core defrosting process is not affected, and the heat field distribution during the defrosting process is improved, thereby improving the uniformity and efficiency of defrosting, reducing the risk of local overheating, and effectively avoiding food quality deterioration.

[0180] In some embodiments, a damper opening compensation control method is provided, such as Figure 10 As shown, the method includes:

[0181] Step 1002: Send a control command to the damper assembly to control the damper to rotate based on the target opening value;

[0182] Step 1004: Obtain the current pressure value and determine the actual opening value of the damper based on the current pressure value. The current pressure value is the pressure received by the pressure conversion component, and the pressure received by the pressure conversion component changes with the actual opening of the damper.

[0183] Step 1006: If the deviation between the actual opening value and the target opening value exceeds the preset deviation threshold, the actual opening of the damper is compensated and controlled.

[0184] In some embodiments, the pressure conversion component includes:

[0185] The rotating mechanism, connected to the damper's door panel, is configured to rotate synchronously with the damper;

[0186] The connecting part includes a fixed end and an overlapping section. The fixed end is fixed to the rotating mechanism, and the overlapping end overlaps with the pressure conversion component. As the connecting part rotates with the rotating mechanism, the contact point between the overlapping end and the pressure conversion component changes, and the pressure applied by the overlapping end to the pressure conversion component is different at different contact points.

[0187] The pressure conversion component, which is elastically connected to the pressure sensor, is configured to transmit the pressure applied by the connection to the pressure sensor.

[0188] In some embodiments, the pressure conversion component is an arc-shaped member coaxially arranged with the rotating mechanism, the connecting portion overlaps on the first bottom surface of the arc-shaped member, and the second bottom surface of the arc-shaped member is elastically connected to the pressure sensor; the arc-shaped member has different thicknesses along the axial direction at at least some different positions in the circumferential direction.

[0189] In some embodiments, after compensating for the actual opening of the damper, the method further includes:

[0190] Count the number of compensation controls to determine the cumulative number of compensation controls;

[0191] If the cumulative number of times is less than or equal to the preset counting threshold, return to the step of obtaining the current pressure value output by the pressure sensor until the deviation between the actual opening value and the target opening value does not exceed the preset deviation threshold, or until the cumulative number of times is greater than the preset counting threshold.

[0192] If the cumulative number of counts exceeds a preset threshold, the refrigerator is determined to be in an abnormal cooling state.

[0193] In some embodiments, after compensating for the actual opening of the damper, the method further includes:

[0194] Begin the first timing;

[0195] When the first timer reaches the preset initialization time threshold, the damper assembly is initialized, and the process of sending control commands to the damper assembly is resumed until the deviation between the actual opening value and the target opening value does not exceed the preset deviation threshold.

[0196] In some embodiments, the refrigerator includes a refrigeration system; after compensating for the actual opening degree of the damper, the method further includes:

[0197] The refrigeration system is paused, and the second timing begins.

[0198] When the second timer reaches the preset shutdown time threshold, the damper assembly is initialized and the refrigeration system is controlled to resume operation. The process returns to the step of sending control commands to the damper assembly until the deviation between the actual opening value and the target opening value does not exceed the preset deviation threshold.

[0199] In some embodiments, when the deviation between the actual opening value and the target opening value exceeds a preset deviation threshold, compensation control is performed on the actual opening of the damper, including:

[0200] If the deviation between the actual opening value and the target opening value exceeds a preset deviation threshold, determine whether the refrigerator is currently in an abnormal cooling state.

[0201] If the refrigerator is not currently in an abnormal cooling state, the actual opening degree of the damper will be compensated and controlled.

[0202] If the refrigerator is currently experiencing a cooling malfunction, the preset defrosting program will be executed.

[0203] In some embodiments, performing a preset defrosting procedure includes:

[0204] Determine the current temperature setpoint of the storage room, the current measured temperature of the storage room, and the defrosting interval between the last defrosting and the current time;

[0205] If the defrosting interval exceeds the preset interval threshold and the measured temperature is lower than the preset temperature threshold, the preset defrosting program is executed. The preset temperature threshold is higher than the set temperature value, and the temperature difference between the set temperature value and the preset temperature threshold is less than the preset temperature difference threshold.

[0206] In some embodiments, the refrigerator includes a cooling fan; when the defrosting interval exceeds a preset interval threshold and the measured temperature is lower than a preset temperature threshold, a preset defrosting program is executed, including:

[0207] If the defrosting interval exceeds the preset interval threshold and the actual temperature is lower than the preset temperature threshold, the air cooler will be stopped and the preset defrosting program will be executed.

[0208] When the first timer reaches the preset fan start time, the air cooler is controlled to run at a preset duty cycle, and the preset fan start time is less than the preset initialization time threshold.

[0209] When the first timer reaches the preset initialization time threshold, the air cooler is controlled to stop running.

[0210] In this embodiment, during the damper opening and closing control process, the controller first sends a control command to the damper assembly to control the damper to rotate based on the target opening value. During the damper rotation, the pressure conversion component linked to the damper converts its actual opening change into a corresponding pressure change. This pressure change is detected in real time by a high-precision pressure sensor and fed back to the controller, enabling the controller to accurately calculate the actual opening value of the damper and achieve real-time perception of the damper position. Subsequently, the controller compares the actual opening value with the target opening value. If the deviation exceeds a preset deviation threshold, it automatically triggers compensation control of the damper opening, forming a complete closed-loop control. In this way, by introducing a pressure feedback-based closed-loop control mechanism, the controller can perceive the actual opening of the damper, actively identify and compensate for motion abnormalities caused by gear jamming, obstruction by foreign objects, or icing, effectively overcoming the technical defects of stepper motor open-loop control that cannot know the actual position of the damper. This improves the accuracy and reliability of damper opening and closing control, avoids temperature abnormalities caused by damper malfunction, and thus significantly improves the refrigerator's cooling stability and food preservation effect.

[0211] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the methods of the above embodiments.

[0212] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the methods of the above embodiments.

[0213] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the methods of the above embodiments.

[0214] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0215] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0216] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0217] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A refrigerator characterized by comprising: The refrigerator comprises: a cabinet, which is internally provided with a storage chamber for storing food materials; a damper assembly, which comprises at least a damper, and is arranged in a refrigeration air duct of the storage chamber and configured to control the air outlet volume of the refrigeration air duct; a pressure conversion assembly, which is subjected to a pressure that changes with the actual opening degree of the damper; a pressure sensor, which is configured to detect the pressure to which the pressure conversion assembly is subjected; a controller, which is configured to: send a control instruction to the damper assembly to control the damper to rotate based on a target opening degree value; obtain a current pressure value output by the pressure sensor, and determine an actual opening degree value of the damper according to the current pressure value; if the deviation value between the actual opening degree value and the target opening degree value exceeds a preset deviation threshold value, perform compensation control on the actual opening degree of the damper.

2. The refrigerator according to claim 1, characterized in that, The pressure conversion assembly comprises: a rotating mechanism connected to a door plate of the damper and configured to rotate synchronously with the damper; a connecting portion comprising a fixed end and an overlapping end, the fixed end being fixed to the rotating mechanism, and the overlapping end overlapping a pressure conversion component, during the rotation of the connecting portion following the rotating mechanism, the contact points between the overlapping end and the pressure conversion component change, and the pressure applied by the overlapping end to the pressure conversion component at different contact points is different; the pressure conversion component is elastically connected to the pressure sensor and configured to transmit the pressure applied by the connecting portion to the pressure sensor.

3. The refrigerator according to claim 2, characterized in that, The pressure conversion component is a circular arc-shaped member coaxially arranged with the rotating mechanism, the connecting portion overlaps a first bottom surface of the circular arc-shaped member, a second bottom surface of the circular arc-shaped member is elastically connected to the pressure sensor, and the thickness of the circular arc-shaped member in the axial direction is different at at least some different positions in the circumferential direction.

4. The refrigerator according to claim 1, characterized in that, After the compensation control on the actual opening degree of the damper, the controller is further configured to: count the compensation control to determine the cumulative number of times of the compensation control; if the cumulative number of times is less than or equal to a preset cumulative threshold value, return to execute the step of obtaining the current pressure value detected by the pressure sensor until the deviation value between the actual opening degree value and the target opening degree value does not exceed the preset deviation threshold value, or until the cumulative number of times is greater than the preset cumulative threshold value; if the cumulative number of times is greater than the preset cumulative threshold value, determine that the refrigerator is in a refrigeration abnormal state.

5. The refrigerator according to claim 4, characterized in that, After determining that the refrigerator is in a refrigeration abnormal state, the controller is further configured to: start a first timing; when the first timing reaches a preset initialization time threshold value, initialize the damper assembly, and return to execute the step of sending a control instruction to the damper assembly until the deviation value between the actual opening degree value and the target opening degree value does not exceed the preset deviation threshold value.

6. The refrigerator according to claim 5, characterized in that, The refrigerator comprises a refrigeration system; after determining that the refrigerator is in a refrigeration abnormal state, the controller is further configured to: control the refrigeration system to suspend operation and start a second timing; When a second timing reaches a preset shutdown time threshold, the damper assembly is initialized, and the refrigeration system is controlled to resume operation, and the step of sending a control instruction to the damper assembly is executed until a deviation between the actual opening value and the target opening value does not exceed a preset deviation threshold.

7. The refrigerator according to claim 6, characterized in that In the process of compensating control of the actual opening of the damper when the deviation between the actual opening value and the target opening value exceeds the preset deviation threshold, the controller is further configured to: determine whether the refrigerator is currently in a refrigeration abnormal state; if the refrigerator is not currently in a refrigeration abnormal state, compensating control the actual opening of the damper; if the refrigerator is currently in a refrigeration abnormal state, execute a preset defrosting program.

8. The refrigerator according to claim 7, characterized in that, In the process of executing the preset defrosting program, the controller is further configured to: determine a current temperature set value of the storage compartment, a current temperature measured value of the storage compartment, and a defrosting interval duration between the last defrosting and the current time; execute a preset defrosting program when the defrosting interval duration exceeds a preset interval duration threshold and the temperature measured value is lower than a preset temperature threshold, wherein the preset temperature threshold is higher than the temperature set value, and a temperature difference between the temperature set value and the preset temperature threshold is less than a preset temperature difference threshold.

9. The refrigerator according to claim 8, characterized in that, The refrigerator comprises a cold air fan; in the process of executing the preset defrosting program when the defrosting interval duration exceeds the preset interval duration threshold and the temperature measured value is lower than the preset temperature threshold, the controller is further configured to: control the cold air fan to suspend operation and execute the preset defrosting program when the defrosting interval duration exceeds the preset interval duration threshold and the temperature measured value is lower than the preset temperature threshold; control the cold air fan to operate at a preset duty ratio when a first timing reaches a preset fan startup time, the preset fan startup time being less than a preset initialization time threshold; control the cold air fan to suspend operation when the first timing reaches the preset initialization time threshold.

10. A damper opening degree compensation control method characterized by comprising: The method comprises: sending a control instruction to a damper assembly to control the damper to rotate based on a target opening value; obtaining a current pressure value, and determining an actual opening value of the damper based on the current pressure value, wherein the current pressure value is a pressure received by a pressure conversion assembly, and the pressure received by the pressure conversion assembly changes with the actual opening of the damper; compensating control the actual opening of the damper when a deviation between the actual opening value and the target opening value exceeds a preset deviation threshold.

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