Defrosting method, defrosting control device, computer readable storage medium, and refrigerator

Abstract

The application provides a defrosting method, a defrosting control device, a computer readable storage medium and a refrigerator. The first image of the frost layer before the power of the refrigerator is cut off and the second image of the frost layer after the power of the refrigerator is cut off and then turned on again are acquired, so that the target defrosting mode is determined from a plurality of defrosting modes according to the difference between the first image and the second image, the performance of the refrigerator caused by incomplete defrosting or too long defrosting time is avoided, and the use efficiency and use reliability of the refrigerator are improved.

Description

Technical Field

[0001] This application belongs to the field of household appliances, and particularly relates to a defrosting method, a defrosting control device, a computer-readable storage medium, and a refrigerator. Background Technology

[0002] In regions and countries with frequent power outages, refrigerators often face the problem of interrupted defrosting due to power outages, affecting their cooling performance and energy efficiency. Traditional defrosting systems lack intelligent defrosting recovery functions and cannot intelligently adjust based on the defrosting progress before the power outage and actual needs. If the defrosting strategy cannot be adjusted in time, problems such as incomplete defrosting, excessively long defrosting time, and excessive energy consumption can easily occur. Summary of the Invention

[0003] This application provides a defrosting method, a defrosting control device, a computer-readable storage medium, and a refrigerator to solve the problems of incomplete defrosting or excessively long defrosting time in existing refrigerators after a power outage.

[0004] This application provides a defrosting method for use in a refrigerator, the defrosting method comprising:

[0005] Obtain the first image of the frost layer on the refrigerator before the power failure;

[0006] Obtain a second image of the frost layer when the refrigerator is powered on again after a power outage;

[0007] Based on the difference between the first image and the second image, the target defrosting mode is determined from multiple defrosting modes.

[0008] Optionally, determining the target defrost mode from multiple defrost modes based on the difference between the first image and the second image includes:

[0009] Target feature parameters are obtained from the first image and the second image respectively, and the target feature parameters include at least one of frost layer thickness parameter, frost layer area parameter, and frost layer texture parameter;

[0010] If the difference between the target feature parameters of the first image and the target feature parameters of the second image is within a preset difference range, then defrosting is performed in the first defrosting mode.

[0011] If the difference between the target feature parameters of the first image and the target feature parameters of the second image exceeds a preset difference range, then defrosting is performed in the second defrosting mode. The defrosting power consumption of the first defrosting mode and the second defrosting mode is different.

[0012] Optionally, the defrosting in the first defrosting mode includes:

[0013] Defrosting continues for a first preset duration at the first preset power.

[0014] Get the third image of the refrigerator after the first preset defrosting time;

[0015] Obtain the corresponding target feature parameters from the third image, and when the target feature parameters of the third image are less than or equal to the preset parameter value, continue defrosting with the second preset power for the second preset duration and then end the defrosting process.

[0016] Optionally, before the defrosting process continues at a first preset power for a first preset duration, the following steps are included:

[0017] Obtain the first temperature of the evaporator of the refrigerator before the power failure;

[0018] Obtain the second temperature of the evaporator when the refrigerator is powered on again after a power outage;

[0019] Defrosting is performed using a first preset power based on the temperature difference between the first temperature and the second temperature. The magnitude of the first preset power is inversely correlated with the temperature difference.

[0020] Optionally, obtaining target feature parameters from the first image and the second image respectively includes:

[0021] Multiple target regions of the frost layer are identified from the first or second image;

[0022] Obtain initial feature parameters for each target region, wherein the initial feature parameters include at least one of frost layer thickness parameter, frost layer area parameter, and frost layer texture parameter;

[0023] The average value of the initial feature parameters corresponding to the multiple target regions is used as the target feature parameter.

[0024] Optionally, the defrosting in the second defrosting mode includes:

[0025] Obtain the working stages of the refrigerator before the power failure;

[0026] If the refrigerator was in the defrosting stage before the power failure, then obtain the first defrosting time of the refrigerator;

[0027] When the refrigerator is powered on again, the normal defrosting time is obtained, and the defrosting continues for a second defrosting time, which is the difference between the first defrosting time and the second defrosting time.

[0028] Optionally, after obtaining the working stage of the refrigerator before the power outage, the process includes:

[0029] If the refrigerator was not in the defrosting stage before the power outage, obtain the first interval between the end of the last defrosting and the power outage.

[0030] When the refrigerator is powered on again, the defrosting interval time between two defrosting cycles during normal refrigerator operation is obtained, and defrosting is performed after waiting for a second interval time, the second interval time being the difference between the defrosting interval time and the first interval time.

[0031] This application also provides a defrosting control device, including:

[0032] The detection module is used to acquire a first image of the frost layer before the refrigerator loses power and a second image of the frost layer after the refrigerator loses power and is powered back on.

[0033] The analysis module is used to analyze the differences between the first image and the second image;

[0034] The determination module is used to determine the target defrost mode from multiple defrost modes based on the difference between the first image and the second image.

[0035] This application also provides a refrigerator, including a processor and a memory, wherein the memory has a computer program, characterized in that the processor executes the defrosting method as described above by calling the computer program.

[0036] Optionally, the refrigerator includes:

[0037] The cabinet includes a freezer compartment, a refrigerator compartment, and an air duct. The freezer compartment and the refrigerator compartment are spaced apart. The air duct includes a refrigerator air duct and a freezer air duct that are connected to each other. The refrigerator air duct is connected to the refrigerator compartment, and the freezer air duct is connected to the freezer compartment. The connection between the refrigerator air duct and the freezer air duct forms an air duct opening.

[0038] An air damper is provided at the air duct opening to control the connection and isolation between the refrigeration air duct and the freezing air duct;

[0039] A heat exchanger is installed inside the housing and near the air duct opening;

[0040] A defrosting device is disposed near the heat exchanger to provide heat to the heat exchanger to defrost it. During the defrosting process, the heat exchanger can conduct the heat energy released by the defrosting device to the air duct and damper.

[0041] The defrosting method, defrosting control device, computer-readable storage medium, and refrigerator provided in this application embodiment acquire a first image of the frost layer before the refrigerator loses power and a second image of the frost layer after the refrigerator loses power and is re-energized. Based on the difference between the first image and the second image, a target defrosting mode is determined from multiple defrosting modes. This avoids the reduction in refrigerator performance caused by incomplete defrosting or excessive defrosting time, thereby improving the refrigerator's efficiency and reliability. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0044] Figure 1 This is a schematic diagram of the first process of the defrosting method provided in this embodiment.

[0045] Figure 2 This is a schematic diagram of the second process of the defrosting method provided in this embodiment.

[0046] Figure 3 This is a schematic diagram of the third process of the defrosting method provided in this embodiment.

[0047] Figure 4 This is a schematic diagram of the fourth process of the defrosting method provided in this embodiment.

[0048] Figure 5 This is a schematic diagram of the defrosting control device provided in this embodiment.

[0049] Figure 6 This is a schematic diagram of the refrigerator provided in this embodiment. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0051] Please see Figure 1 , Figure 1 This is a schematic diagram of the first process of the defrosting method provided in this embodiment. This embodiment provides a defrosting control method, which can be executed by a processor in a terminal such as a management terminal. This embodiment uses a two-door refrigerator as an example for illustration. The refrigerator has two independent cooling compartments, including a refrigerator compartment and a freezer compartment. The refrigerator also includes a temperature sensor and a vision sensor. The temperature sensor is used to acquire an image of the frost layer on the evaporator and to acquire the evaporator temperature.

[0052] S1. Obtain the first image of the frost layer before the refrigerator loses power;

[0053] S2. Obtain a second image of the frost layer when the refrigerator is powered on again after a power outage;

[0054] S3. Based on the difference between the first image and the second image, determine the target defrosting mode from multiple defrosting modes.

[0055] Specifically, in this application, a refrigerator power outage includes an unexpected power failure during defrosting without manual intervention to exit the defrosting process. Reinstatement includes the restoration of power to allow the defrosting process to resume normally. Before a power outage, a vision sensor monitors the frost layer image on the evaporator during defrosting and stores a first image of the frost layer before the power outage. When the refrigerator is restored to power after a power outage, the vision sensor acquires a second image of the frost layer and compares it with the first image. For ease of comparison, the areas captured by the first and second images can be the same during a single defrosting process, while the captured areas can be adjusted according to actual conditions during different defrosting processes. The first and second images can be partial or complete images of the evaporator. The first image can be a selected image from multiple consecutive images under monitoring conditions, or an image captured within a short preset time before the power outage; the same applies to the second image. In existing technologies, refrigerators can continue defrosting after a power outage and subsequent restoration, but they fail to intelligently adjust based on the defrosting progress before the power outage and actual needs. Since the duration of a power outage is unknown, the defrosting time required after the refrigerator is powered back on varies depending on environmental conditions. If the defrosting strategy is not adjusted in time, problems such as incomplete defrosting, excessively long defrosting time, and excessive energy consumption may occur. The power outage defrosting recovery function in this proposal has intelligent features. It can not only resume unfinished defrosting actions, but also intelligently adjust the defrosting strategy based on the defrosting progress before the power outage to maximize energy efficiency and user experience.

[0056] For example, please refer to Figure 2 , Figure 2 This is a schematic diagram of the second process of the defrosting method provided in this embodiment. The step of determining the target defrosting mode from multiple defrosting modes based on the difference between the first image and the first image includes:

[0057] S31. Obtain target feature parameters from the first image and the second image respectively. The target feature parameters include at least one of frost layer thickness parameter, frost layer area parameter, and frost layer texture parameter.

[0058] S32. If the difference between the target feature parameters of the first image and the target feature parameters of the second image is within a preset difference range, then defrost is performed in the first defrost mode.

[0059] S33. If the difference between the target feature parameters of the first image and the target feature parameters of the second image exceeds a preset difference range, then defrost is performed in the second defrost mode. The defrost power consumption of the first defrost mode and the second defrost mode is different.

[0060] Specifically, before the refrigerator loses power, a visual sensor acquires a first image of the frost layer before the power outage and extracts its target feature parameters from the first image. The target feature parameters of the first image include at least one of the following: frost layer thickness parameter, frost layer area parameter, and frost layer texture parameter. When the refrigerator is powered back on after the power outage, a second image of the frost layer before the power outage is acquired, and its target feature parameters are extracted from the second image. The target feature parameters of the second image include at least one of the following: frost layer thickness parameter, frost layer area parameter, and frost layer texture parameter. This application uses the acquisition of the frost layer thickness parameter as an example. The preset difference range is the difference in frost layer thickness at certain intervals during normal defrosting. For example, under normal defrosting conditions, if the frost layer thickness is 5 mm after one hour of defrosting and 3 mm after two hours of defrosting, with an interval of one hour, the difference in frost layer thickness is 2 mm. If the refrigerator loses power one hour after defrosting, and the power outage lasts for one hour, then the preset difference range at this time corresponds to 2 mm. If the frost thickness obtained from the first image before the refrigerator loses power is 5 mm, and the frost thickness obtained from the second image after the refrigerator is powered on again is 3 mm, then the difference between the frost thickness parameters of the first image and the second image is considered to be within a preset difference range, and the refrigerator defrosts in the first defrosting mode. If the frost thickness obtained from the second image after the refrigerator is powered on again is 2 mm, then the difference between the frost thickness parameters of the first image and the second image exceeds a preset difference range, and the refrigerator defrosts in the second defrosting mode.

[0061] It should be noted that when acquiring multiple target feature parameters, as long as the difference between any target feature parameter of the first image and the target feature parameter of the second image is within a preset difference range, the refrigerator will defrost in the first defrosting mode. This application uses the acquisition of frost thickness parameters and frost area parameters as an example. If the preset difference range for frost thickness is 2 mm and the preset difference range for frost area is 200 square centimeters, and assuming that before the refrigerator loses power, the frost thickness obtained from the first image is 5 mm and the frost area is 500 square centimeters, and if after the refrigerator loses power and is re-energized, the frost thickness obtained from the second image is 3 mm and the frost area is 300 square centimeters, then the refrigerator defrosts in the first defrosting mode; if after the refrigerator loses power and is re-energized, the frost thickness obtained from the second image is 3 mm and the frost area is 200 square centimeters, then the refrigerator also defrosts in the first defrosting mode; if after the refrigerator loses power and is re-energized, the frost thickness obtained from the second image is 2 mm and the frost area is 200 square centimeters, then the refrigerator defrosts in the second defrosting mode.

[0062] Referring to the foregoing, when the difference between the frost thickness parameters of the first image and the second image exceeds a preset difference range, it can be assumed that the frost layer may have undergone a certain degree of natural defrosting during the power outage. Therefore, in the second defrosting mode, the urgency of defrosting is not high, and defrosting can be performed slowly and intermittently. However, when the difference between the frost thickness parameters of the first image and the second image is within the preset difference range, the frost thickness is still relatively high, requiring continuous and rapid defrosting. Therefore, the defrosting power consumption in the first defrosting mode will be greater than that in the second defrosting mode.

[0063] For example, please refer to Figure 3 , Figure 3 This is a schematic diagram of the third process of the defrosting method provided in this embodiment. The step of controlling defrosting according to the first defrosting mode includes:

[0064] S321. Continuously defrost at the first preset power for the first preset duration;

[0065] S322. Obtain the third image of the refrigerator after the first preset defrosting time;

[0066] S323. Obtain the corresponding target feature parameters from the third image, and when the target feature parameters of the third image are less than or equal to the preset parameter value, continue defrosting with the second preset power for the second preset duration and then end the defrosting.

[0067] Specifically, in the first defrosting mode, the refrigerator immediately starts defrosting. After a first preset defrosting time, the visual sensor acquires a third image and obtains target feature parameters corresponding to the first and second images from the third image. The target feature parameters include at least one of frost thickness parameters, frost area parameters, and frost texture parameters. For example, if the target feature parameter obtained from the first and second images is the frost thickness parameter, then the target feature parameter obtained from the third image is also the frost thickness parameter. The preset parameter value can be a small number. When the target feature parameter of the third image is less than or equal to this value, defrosting can be considered nearly complete. To avoid incomplete defrosting and repeated frost formation, when the feature parameter of the third image reaches the preset parameter value, it is also necessary to control the defrosting to continue at a second preset power for a second preset time before ending the defrosting. In some embodiments, the first preset power can be greater than the second preset power, and both the first and second preset powers can be higher than the normal defrosting power, and the first preset time can be greater than the second preset time. In the first defrosting mode, maintaining stable defrosting with different power levels ensures that the defrosting process remains at a high efficiency. Before the defrosting process ends, the visual sensor judges the target feature parameters in the third image to ensure that defrosting is completed while avoiding incomplete defrosting.

[0068] For example, before the continuous defrosting at a first preset power for a first preset duration, the process includes:

[0069] Obtain the first temperature of the evaporator of the refrigerator before the power failure;

[0070] Obtain the second temperature of the evaporator when the refrigerator is powered on again after a power outage;

[0071] Defrosting is performed using a first preset power based on the temperature difference between the first temperature and the second temperature. The magnitude of the first preset power is inversely correlated with the temperature difference.

[0072] Specifically, when the refrigerator loses power, it cannot maintain cooling. When the refrigerator is powered back on, the evaporator temperature may rise. If the evaporator temperature is high, defrosting can be performed using a relatively low power. For example, if the evaporator's initial temperature before the power outage is -3°C, and the temperature sensor detects a second evaporator temperature of -1°C after the power outage and power restoration, the temperature difference is 2°C, and the first preset power is P1. If the temperature sensor detects a second evaporator temperature of 1°C after the power outage and power restoration, the temperature difference is 4°C, and the first power is P2, where P2 is less than P1. It is understood that in some embodiments, the first preset power is not a fixed value and can change according to the temperature difference of the evaporator before and after the power outage.

[0073] For example, obtaining target feature parameters from the first image and the second image respectively includes:

[0074] Multiple target regions of the frost layer are identified from the first or second image;

[0075] Obtain initial feature parameters for each target region, wherein the initial feature parameters include at least one of frost layer thickness parameter, frost layer area parameter, and frost layer texture parameter;

[0076] The average value of the initial feature parameters corresponding to the multiple target regions is used as the target feature parameter.

[0077] Specifically, there may be multiple frost zones on the refrigerator evaporator, and the thickness, area, and texture of the frost layer in each zone are different. For example, the frost layer will be thicker in lower-temperature areas than in other areas. Multiple visual sensors can be installed inside the refrigerator to monitor the frost layer images in different areas. In some embodiments, before the refrigerator loses power, the vision sensor detects three different areas A, B, and C. If the frost thickness in area A is L1, the frost thickness in area B is L2, and the frost thickness in area C is L3, then the frost thickness parameter of the first image is L4 = (L1 + L2 = L3) / 3. After the refrigerator loses power and is powered on again, the vision sensor still detects three different areas A, B, and C. If the frost thickness in area A is L5, the frost thickness in area B is L6, and the frost thickness in area C is L7, then the frost thickness parameter of the second image is L8 = (L5 + L6 = L7) / 3. When the difference between L8 and L4 is within a preset difference range, the refrigerator will control the first defrosting mode to start defrosting, so as to improve defrosting efficiency and reduce unnecessary defrosting time.

[0078] For example, please refer to Figure 4 , Figure 4 This is a schematic diagram of the fourth process of the defrosting method provided in this embodiment. The defrosting process in the second defrosting mode includes:

[0079] S331. Obtain the working stage of the refrigerator before power failure;

[0080] S332. If the refrigerator was in the defrosting stage before the power failure, then obtain the first defrosting time of the refrigerator.

[0081] S333. When the refrigerator is powered on again, obtain the defrosting time of the refrigerator during normal defrosting, and continue defrosting for a second defrosting time, the second defrosting time being the difference between the defrosting time and the first defrosting time.

[0082] Furthermore, after obtaining the working stage of the refrigerator before the power outage, the process includes:

[0083] S334. If the refrigerator was not in the defrosting stage before the power failure, obtain the first interval between the end of the last defrosting and the power failure.

[0084] S335. When the refrigerator is powered on again, obtain the defrosting interval time between two defrosting cycles during normal refrigerator operation, and wait for the second interval time before defrosting, wherein the second interval time is the difference between the defrosting interval time and the first interval time.

[0085] Specifically, in the second defrost mode, the refrigerator defrosts multiple times at lower defrost power intervals. Let T1 be the defrost time for each defrost cycle, and T2 be the defrost interval between two defrost cycles during normal operation. When the refrigerator loses power, if it is in the defrost cycle and has defrosted for T3 hours, it will defrost for another T4 hours after power is restored, where T4 is the difference between T1 and T3. If the refrigerator loses power but is not in the defrost cycle, and the interval between the last defrost cycle and T5 is T5, it will defrost for another T6 hours after power is restored, where T6 is the difference between T2 and T5. In other words, if the refrigerator's defrost time is fixed during normal operation, and the power outage duration is T7, the remaining defrost time can be extended by T7 after power loss and restoration to ensure that the power outage does not affect the total defrost time. Compared to the typical defrosting process that restarts after a power outage, this application can record the defrosting progress during a power outage. When the refrigerator is powered on again, it can control the resumption of the defrosting operation based on the defrosting progress before the power outage, thus avoiding the defrosting process being affected by a power outage.

[0086] Please see Figure 5 , Figure 5 This is a schematic diagram of the defrosting control device provided in this embodiment. This application provides a defrosting control device 100, which includes:

[0087] The detection module 101 is used to acquire a first image of the frost layer before the refrigerator loses power and a second image of the frost layer after the refrigerator loses power and is powered on again.

[0088] Analysis module 102 is used to analyze the differences between the first image and the second image;

[0089] The determination module 103 is used to determine the target defrosting mode from multiple defrosting modes based on the difference between the first image and the second image.

[0090] Please see Figure 6 , Figure 6 This is a schematic diagram of the refrigerator provided in this embodiment. This application also provides a refrigerator 200, which includes a processor 201 and a memory 202. The memory contains a computer program, and the processor executes the defrosting control method as described above by calling the computer program.

[0091] For example, the refrigerator 200 includes a cabinet, which includes a freezer compartment 211, a refrigerator compartment 212, and an air duct. The freezer compartment 211 and the refrigerator compartment 212 are spaced apart. The air duct includes a refrigerator air duct and a freezer air duct that are connected to each other. The refrigerator air duct connects to the refrigerator compartment 212, and the freezer air duct connects to the freezer compartment 211. The connection between the refrigerator air duct and the freezer air duct forms an air duct opening. The refrigerator also includes an air damper, which is disposed at the air duct opening to control the connection and isolation between the refrigerator air duct and the freezer air duct. When the air damper is open, the refrigerator air duct and the freezer air duct are connected; when the air damper is closed, the refrigerator air duct and the freezer air duct are isolated.

[0092] The refrigerator also includes a heat exchanger and a defrosting device. The heat exchanger is located inside the refrigerator and near the air duct. The defrosting device is located near the heat exchanger and is used to provide heat to the heat exchanger to defrost it. During the defrosting process, the heat exchanger can conduct the heat energy released by the defrosting device to the air duct and the damper. By recovering and reusing the heat energy during the defrosting process, energy consumption can be reduced and the energy efficiency of the refrigerator can be improved.

[0093] Specifically, the refrigerator has a cold cycle consisting of a compressor, condenser, and evaporator, which circulates the cold air generated by the refrigeration cycle within the refrigerator to cool each compartment. When the heat exchanger functions as an evaporator, low-pressure refrigerant flows into the refrigerant pipe and absorbs heat from the outside air, thus evaporating and supplying cold air to the freezer or refrigerator compartment. The refrigerator body includes an outer shell and an inner liner. The evaporator can be located inside the inner liner or between the inner liner and the outer shell. Because the refrigerator's damper is prone to freezing and becoming unable to rotate during the refrigeration process, a damper heating wire is usually required to assist in defrosting the damper. In this application, the heat energy released by the defrosting device is transferred to the heat exchanger. Using the heat exchanger to preheat the refrigerator's air duct openings with the heat energy released by the defrosting device can prevent the damper from freezing and reduce reliance on the damper heating wire. During the preheating process, the air near the heat exchanger is heated and turns into water vapor, which is then conducted through the air duct to the air duct opening and damper. Meanwhile, the air duct and the air outlets connecting each compartment are closed to prevent the defrosting temperature from rising and affecting the compartment temperature. The defrosting device can use traditional defrosting techniques, such as using a heater or circulating heat medium to remove frost from the refrigerator evaporator. Other defrosting techniques can also be used by those skilled in the art, and this application does not limit them.

[0094] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0095] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0096] The defrosting method, defrosting control device, computer-readable storage medium, and refrigerator provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A defrosting method, applied to a refrigerator, characterized in that, The defrosting method includes: Obtain the first image of the frost layer on the refrigerator before the power failure; Obtain a second image of the frost layer when the refrigerator is powered on again after a power outage; Based on the difference between the first image and the second image, the target defrost mode is determined from multiple defrost modes; The step of determining the target defrost mode from multiple defrost modes based on the difference between the first image and the second image includes: Target feature parameters are obtained from the first image and the second image respectively, and the target feature parameters include at least one of frost layer thickness parameter, frost layer area parameter, and frost layer texture parameter; If the difference between the target feature parameters of the first image and the target feature parameters of the second image is within a preset difference range, then defrosting is performed in the first defrosting mode. If the difference between the target feature parameters of the first image and the target feature parameters of the second image exceeds a preset difference range, then defrosting is performed in the second defrosting mode. The defrosting power consumption of the first defrosting mode and the second defrosting mode is different.

2. The defrosting method according to claim 1, characterized in that, The defrosting process using the first defrosting mode includes: Defrosting continues for a first preset duration at the first preset power. Get the third image of the refrigerator after the first preset defrosting time; Obtain the corresponding target feature parameters from the third image, and when the target feature parameters of the third image are less than or equal to the preset parameter value, continue defrosting with the second preset power for the second preset duration and then end the defrosting process.

3. The defrosting method according to claim 2, characterized in that, Before the first preset power continuous defrosting for a first preset duration, including: Obtain the first temperature of the evaporator of the refrigerator before the power failure; Obtain the second temperature of the evaporator when the refrigerator is powered on again after a power outage; Defrosting is performed using a first preset power based on the temperature difference between the first temperature and the second temperature. The magnitude of the first preset power is inversely correlated with the temperature difference.

4. The defrosting method according to claim 1, characterized in that, The step of obtaining target feature parameters from the first image and the second image respectively includes: Multiple target regions of the frost layer are identified from the first or second image; Obtain initial feature parameters for each target region, wherein the initial feature parameters include at least one of frost layer thickness parameter, frost layer area parameter, and frost layer texture parameter; The average value of the initial feature parameters corresponding to the multiple target regions is used as the target feature parameter.

5. The defrosting method according to claim 1, characterized in that, The defrosting process using the second defrosting mode includes: Obtain the working stages of the refrigerator before the power failure; If the refrigerator was in the defrosting stage before the power failure, then obtain the first defrosting time of the refrigerator; When the refrigerator is powered on again, the normal defrosting time is obtained, and the defrosting continues for a second defrosting time, which is the difference between the first defrosting time and the second defrosting time.

6. The defrosting method according to claim 5, characterized in that, After obtaining the working stage of the refrigerator before the power outage, the process includes: If the refrigerator was not in the defrosting stage before the power outage, obtain the first interval between the end of the last defrosting and the power outage. When the refrigerator is powered on again, the defrosting interval time between two defrosting cycles during normal refrigerator operation is obtained, and defrosting is performed after waiting for a second interval time, the second interval time being the difference between the defrosting interval time and the first interval time.

7. A defrosting control device, characterized in that, include: The detection module is used to acquire a first image of the frost layer before the refrigerator loses power and a second image of the frost layer after the refrigerator loses power and is powered back on. The analysis module is used to analyze the differences between the first image and the second image; The determination module is used to determine the target defrost mode from multiple defrost modes based on the difference between the first image and the second image; The step of determining the target defrosting mode from multiple defrosting modes based on the difference between the first image and the second image includes: obtaining target feature parameters from the first image and the second image respectively, wherein the target feature parameters include at least one of the following: frost layer thickness parameter, frost layer area parameter, and frost layer texture parameter; if the difference between the target feature parameters of the first image and the target feature parameters of the second image is within a preset difference range, then defrosting is performed using the first defrosting mode; If the difference between the target feature parameters of the first image and the target feature parameters of the second image exceeds a preset difference range, then defrosting is performed in the second defrosting mode. The defrosting power consumption of the first defrosting mode and the second defrosting mode is different.

8. A refrigerator, comprising a processor and a memory, wherein the memory has a computer program, characterized in that, The processor invokes the computer program to execute the defrosting method as described in any one of claims 1 to 6.

9. A refrigerator according to claim 8, characterized in that, include: The cabinet includes a freezer compartment, a refrigerator compartment, and an air duct. The freezer compartment and the refrigerator compartment are spaced apart. The air duct includes a refrigerator air duct and a freezer air duct that are connected to each other. The refrigerator air duct is connected to the refrigerator compartment, and the freezer air duct is connected to the freezer compartment. The connection between the refrigerator air duct and the freezer air duct forms an air duct opening. An air damper is provided at the air duct opening to control the connection and isolation between the refrigeration air duct and the freezing air duct; A heat exchanger is installed inside the housing and near the air duct opening; A defrosting device is disposed near the heat exchanger to provide heat to the heat exchanger to defrost it. During the defrosting process, the heat exchanger can conduct the heat energy released by the defrosting device to the air duct and damper.

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