Air door fault detection method, device, computer readable storage medium and refrigerator

Abstract

Embodiments of the present application provide a damper fault detection method and device, a computer readable storage medium and a refrigerator. Before a refrigeration cycle of the refrigerator is started, an initial water molecule content and an initial air speed in a preset range adjacent to the damper are obtained. After the refrigeration cycle of the refrigerator is started, a first running water molecule content and a first running air speed in the preset range are obtained, and a first content difference between the first running water molecule content and the initial water molecule content, and a first air speed difference between the first running air speed and the initial air speed are determined. If the first content difference is greater than a preset content threshold and the first air speed difference is less than a preset air speed threshold, it is determined that the damper has an icing fault. If the first content difference is less than the preset content threshold or the first air speed difference is greater than the preset air speed threshold, it is determined that the damper does not have an icing fault. The difference between the water molecule content and the air speed difference are used to determine whether the damper has an icing fault, so that the determination of the damper icing fault is more accurate.

Description

Technical Field

[0001] This application belongs to the field of household appliances, and particularly relates to a method, apparatus, computer-readable storage medium, and refrigerator for detecting damper malfunctions. Background Technology

[0002] When a refrigerator starts cooling, the damper can easily freeze and ic up during opening and closing due to moisture molecules in the air or the presence of hot food. This can prevent the damper from functioning properly and affect the cooling of the refrigerator compartment. Most current refrigerator damper detection methods rely on observing changes in the internal temperature of the refrigerator to indirectly determine if the damper is icing up. However, judging by temperature changes is inaccurate, allowing the damper to remain icy for too long, thus affecting the cooling process and causing food spoilage. Summary of the Invention

[0003] This application provides a method, apparatus, computer-readable storage medium, and refrigerator for detecting damper faults, in order to solve the problem of insufficient accuracy in judging damper icing faults in existing technologies.

[0004] This application provides a method for detecting damper malfunctions, applied to a refrigerator, the refrigerator including a refrigerator compartment, the refrigerator compartment being equipped with a damper, the method comprising:

[0005] Before the refrigerator's cooling cycle begins, the initial water molecule content and initial wind speed within a preset range of adjacent air vents are obtained.

[0006] After the refrigerator's cooling cycle is started, the first operating water molecule content and the first operating wind speed within the preset range are obtained, and the first content difference between the first operating water molecule content and the initial water molecule content, and the first wind speed difference between the first operating wind speed and the initial wind speed are determined.

[0007] If the first content difference is greater than the preset content threshold and the first wind speed difference is less than the preset wind speed threshold, then it is determined that the damper has an icing failure.

[0008] If the first content difference is less than the preset content threshold, or the first wind speed difference is greater than the preset wind speed threshold, then it is determined that no icing fault has occurred within the preset range of the adjacent air door.

[0009] Optionally, before obtaining the first operating water molecule content and the first operating wind speed within the preset range of the damper, the method further includes:

[0010] Obtain the first rate of decrease of the refrigeration temperature within the preset range during the refrigeration cycle;

[0011] When the first descent rate is less than the preset rate, the current second operating water molecule content and the second operating wind speed within the preset range are obtained, and the second content difference between the second operating water molecule content and the initial water molecule content, and the second wind speed difference between the second operating wind speed and the initial wind speed are determined.

[0012] The second content difference is determined to be a preset content threshold, and the second wind speed difference is determined to be a preset wind speed threshold.

[0013] Optionally, after the refrigerator's cooling cycle begins, before obtaining the first rate of decrease in the refrigeration temperature during the cooling cycle, the process includes:

[0014] The second rate of decrease of the refrigeration temperature within the preset range is obtained within multiple preset refrigeration cycles after the damper is de-iced.

[0015] A preset rate is determined based on a plurality of second descent rates.

[0016] Optionally, after the refrigerator's cooling cycle is started, obtaining the first operating water molecule content and the first operating wind speed within the preset range includes:

[0017] After the refrigerator's cooling cycle is started, the temperature inside the refrigerator compartment is obtained;

[0018] Whenever the room temperature drops to a preset temperature value, the first operating water molecule content and the first operating wind speed within the preset range are obtained.

[0019] Optionally, obtaining the initial wind speed within a preset range adjacent to the dampers includes:

[0020] Before the refrigerator's cooling cycle begins, the initial target gas concentration passing through the damper per unit time is obtained, and the initial wind speed is determined based on the initial target gas concentration.

[0021] Obtaining the first operating wind speed within a preset range of adjacent dampers includes:

[0022] After the refrigerator's cooling cycle is started, the concentration of the target gas passing through the damper per unit time is obtained, and the first operating wind speed is determined based on the target gas concentration.

[0023] Optionally, if the first content difference is greater than a preset content threshold and the first wind speed difference is less than a preset wind speed threshold, then determining that the damper has an icing fault includes:

[0024] If the first content difference is greater than the first content threshold and the first wind speed difference is less than the first wind speed threshold, then the damper is determined to be in the first icing state.

[0025] If the first content difference is greater than the second content threshold and the first wind speed difference is less than the second wind speed threshold, then the damper is determined to be in the second icing state, and the amount of icing in the second icing state is greater than the amount of icing in the first icing state.

[0026] Optionally, after determining that the damper is in the first icing state, the process includes:

[0027] Execute the damper reset action to obtain the third operating water molecule content and the third operating wind speed within the preset range.

[0028] Obtain the third content difference between the third operating water molecule content and the initial water molecule content, and the third wind speed difference between the third operating wind speed and the initial wind speed;

[0029] When the third content difference is less than the preset content threshold, or the third wind speed difference is greater than the preset wind speed threshold, the damper icing fault is determined to be eliminated.

[0030] After determining that the damper is in the second icing state, the following steps are included:

[0031] The damper is heated to obtain the fourth operating water molecule content and the fourth operating wind speed within the preset range;

[0032] Obtain the fourth content difference between the fourth operating water molecule content and the initial water molecule content, and the fourth wind speed difference between the fourth operating wind speed and the initial wind speed;

[0033] When the fourth content difference is less than the preset content threshold, or the fourth wind speed difference is greater than the preset wind speed threshold, the damper icing fault is determined to be eliminated.

[0034] This application also provides a damper fault detection device, comprising:

[0035] The detection module is used to acquire the initial water molecule content and initial wind speed within a preset range of adjacent air dampers before the refrigerator's cooling cycle begins, and to acquire the first operating water molecule content and first operating wind speed within the preset range of adjacent air dampers after the refrigerator's cooling cycle begins.

[0036] The determination module is used to determine the first content difference between the first operating water molecule content and the initial water molecule content, and the first wind speed difference between the first operating wind speed and the initial wind speed.

[0037] The judgment module determines that the damper has an icing fault if the first content difference is greater than the preset content threshold and the first wind speed difference is less than the preset wind speed threshold. If the first content difference is less than the preset content threshold or the first wind speed difference is greater than the preset wind speed threshold, the damper has not an icing fault.

[0038] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the damper fault detection method as described above.

[0039] This application also provides a refrigerator, including a processor and a memory, the memory having a computer program, the processor executing the damper fault detection method as described above by calling the computer program.

[0040] This application provides a method, apparatus, computer-readable storage medium, and refrigerator for detecting damper malfunctions. Before the refrigerator's cooling cycle begins, the initial water molecule content and initial wind speed within a preset range of adjacent dampers are acquired. After the refrigerator's cooling cycle begins, a first operating water molecule content and a first operating wind speed within the preset range are acquired, and a first content difference between the first operating water molecule content and the initial water molecule content, and a first wind speed difference between the first operating wind speed and the initial wind speed are determined. If the first content difference is greater than a preset content threshold and the first wind speed difference is less than a preset wind speed threshold, then it is determined that the damper has experienced an icing malfunction. If the first content difference is less than the preset content threshold, or the first wind speed difference is greater than the preset wind speed threshold, then it is determined that the damper has not experienced an icing malfunction. This application, by acquiring water molecule content and wind speed before and after the cooling cycle begins, and using the difference in water molecule content and wind speed to determine whether the damper has experienced an icing malfunction, makes the determination of damper icing malfunctions more accurate, thereby avoiding the impact of prolonged damper icing time on the refrigerator's internal cooling and improving the refrigerator's cooling effect. Attached Figure Description

[0041] 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.

[0042] 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.

[0043] Figure 1 This is a schematic diagram of the first process of the damper fault detection method provided in this embodiment.

[0044] Figure 2 This is a schematic diagram of the second process of the damper fault detection method provided in this embodiment.

[0045] Figure 3 This is a schematic diagram of the third process of the damper fault detection method provided in this embodiment.

[0046] Figure 4This is a schematic diagram of the fourth process of the damper fault detection method provided in this embodiment.

[0047] Figure 5 This is a schematic diagram of the fifth process of the damper fault detection method provided in this embodiment.

[0048] Figure 6 This is a schematic diagram of the damper fault detection device provided in this application.

[0049] Figure 7 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] This embodiment provides a method for detecting damper malfunctions. This method can be executed by a processor in a terminal, such as a management terminal. The method is applicable to refrigerators, for example, frost-free refrigerators. The refrigerator may have two independent cooling compartments, including a refrigerator compartment and a freezer compartment. The damper can be located between the freezer and refrigerator compartments, or between the variable temperature compartment and the refrigerator compartment. The damper controls the cooling of the refrigerator compartment from the freezer compartment when the refrigerator is in cooling mode. Specifically, in cooling mode, the freezer compartment is cooled by an evaporator. If the refrigerator compartment needs cooling, the opening of the damper allows the cooling air generated in the freezer compartment to enter the refrigerator compartment for cooling.

[0052] Please see Figure 1 , Figure 1 This is a first flowchart illustrating the damper fault detection method provided in this embodiment. The damper fault detection method includes:

[0053] 10. Before the refrigerator's cooling cycle begins, the initial water molecule content and initial wind speed within a preset range of adjacent air vents are obtained;

[0054] 20. After the refrigerator's cooling cycle is turned on, the first operating water molecule content and the first operating wind speed within the preset range are obtained, and the first content difference between the first operating water molecule content and the initial water molecule content, and the first wind speed difference between the first operating wind speed and the initial wind speed are determined.

[0055] 30. If the first content difference is greater than a preset content threshold and the first wind speed difference is less than a preset wind speed threshold, then it is determined that the damper has an icing failure.

[0056] 40. If the first content difference is less than the preset content threshold, or the first wind speed difference is greater than the preset wind speed threshold, then it is determined that the damper has not experienced an icing failure.

[0057] Specifically, the cyclical cooling process of a refrigerator is mainly accomplished through the collaborative efforts of four key components: the compressor, condenser, expansion valve, and evaporator. In this way, the refrigerator can periodically maintain the temperature inside the freezer within a suitable range, thereby keeping food fresh. When the internal temperature of a frost-free refrigerator rises, the refrigerant absorbs heat from the room in the evaporator, becoming a low-temperature, low-pressure gas. This gas is then drawn into the compressor, compressed, and becomes a high-temperature, high-pressure gas. It then dissipates heat through the condenser, becoming a high-pressure liquid, and is depressurized by the expansion valve before re-entering the evaporator to absorb heat from the room. The cooling cycle of the refrigerator in this application can be determined based on the compressor's operating cycle. For example, if the compressor starts for 10-25 minutes and then stops for 10-25 minutes, the refrigerator's cooling cycle is 10-25 minutes, and the interval is 10-25 minutes. Since the compressor's cooling cycle may vary depending on the ambient temperature, usage frequency, and compressor model, the cooling cycle may change accordingly; however, this application does not impose a specific limitation on it.

[0058] When a refrigerator is cooling, the internal temperature is low. On one hand, moisture from food or water vapor from residual heat in the dishes easily condenses into ice upon contact with the cold air. On the other hand, due to frequent opening and closing of the door, warm outside air entering the refrigerator also condenses into ice upon encountering the cold air. Therefore, during the cooling process, excessive water content can cause the damper to freeze, affecting its normal closure, resulting in a damper icing malfunction. However, when the wind speed within the preset range of adjacent dampers remains constant or increases, if the water content decreases (i.e., the first content difference is less than the preset content threshold), water accumulation and condensation decrease, preventing the damper from freezing and allowing it to close normally. Similarly, if the water content remains constant or decreases, but the wind speed increases (i.e., the first wind speed difference is greater than the preset wind speed threshold), the faster airflow carries water molecules, also preventing the damper from freezing. Only when both the first content difference and the first wind speed difference are met will the damper experience an icing malfunction. It should be noted that, since the refrigerator defrosts immediately when the water molecule content increases, and the fan turns off during defrosting, resulting in a decrease in airflow speed, the situation of increased water molecule content and increased airflow speed will not occur inside the refrigerator.

[0059] Specifically, the preset range of adjacent air dampers is the range that the humidity sensor can acquire, and the size of the range can be manually set according to the sensing range of the humidity sensor. One or more humidity sensors can be set within the preset range of adjacent air dampers to measure water molecule content. Before the refrigerator cooling cycle starts, the humidity sensor acquires the initial water molecule content at at least one target location within the preset range of adjacent air dampers. After the refrigerator cooling cycle starts, the humidity sensor acquires the first operating water molecule content at at least one target location within the preset range around the adjacent air dampers, and determines the first difference between the first operating water molecule content and the initial water molecule content. The target locations detected by the humidity sensor can be set according to actual conditions. In some embodiments, to monitor water molecule content in real time and accurately, the initial water molecule content of multiple target areas within the preset range around the air dampers can be collected before the refrigerator cooling cycle starts, and the average value of the initial water molecule content of multiple target areas can be calculated. After the refrigerator cooling cycle starts, the first operating water molecule content of multiple target areas within the preset range around the air dampers can be collected, and the average value of the first operating water molecule content of multiple target areas can be calculated. In some embodiments, in order to reduce power consumption and data processing volume, a more concentrated water molecule content detection range can be set. For example, before the refrigerator cooling cycle starts, the humidity sensor obtains the initial water molecule content on the door, and after the refrigerator cooling cycle starts, the humidity sensor obtains the first operating water molecule content on the door.

[0060] Specifically, the preset range of adjacent air vents is the range that the concentration sensor can acquire. The size of the preset range can be manually set according to the sensing range of the concentration sensor, and the preset range that the concentration sensor can acquire can be the same as the range that the humidity sensor can acquire. One or more gas concentration sensors can be set within the preset range of adjacent air vents to measure gas concentration. The gas concentration sensors acquire the instantaneous rate of change of gas concentration per unit time to obtain the airflow speed through the air vents in the refrigerator. It is understood that, under constant refrigerator operating conditions, the higher the gas concentration passing through the air vents per unit time, the faster the refrigerator's airflow speed. Before the refrigerator's cooling cycle begins, the gas concentration sensor acquires the initial target gas concentration passing through the air vents per unit time and determines the initial airflow speed based on the initial target gas concentration. After the refrigerator's cooling cycle begins, the gas concentration sensor acquires the operating target gas concentration passing through the air vents per unit time and determines the first operating airflow speed based on the operating target gas concentration, obtaining the first airflow speed difference between the first operating airflow speed and the initial airflow speed. The target gas can be oxygen, carbon dioxide, etc. The gas concentration sensor can acquire the concentration of at least one gas, and determines the initial airflow speed and the first operating airflow speed based on the concentration of at least one gas.

[0061] For example, please refer to Figure 2 , Figure 2This is a schematic diagram of the second process of the damper fault detection method provided in this embodiment. Before obtaining the first operating water molecule content and the first operating wind speed within a preset range of adjacent dampers, the method further includes:

[0062] 11. Obtain the first rate of decrease of the refrigeration temperature within the preset range during the refrigeration cycle;

[0063] 12. When the first descent rate is less than the preset rate, the current second operating water molecule content and second operating wind speed within the preset range are obtained, and the second content difference between the second operating water molecule content and the initial water molecule content, and the second wind speed difference between the second operating wind speed and the initial wind speed are determined.

[0064] 13. Determine that the second content difference is the preset content threshold, and the second wind speed difference is the preset wind speed threshold.

[0065] Specifically, after a preset duration for the cooling cycle, the first rate of temperature decrease within that preset duration can be obtained. The preset duration can be a relatively long time after the cooling cycle begins; understandably, the longer the cooling time, the greater the probability of damper malfunction. The refrigerator can be equipped with one or more temperature sensors to detect the cooling temperature, which can be the temperature of a target area in the refrigerator compartment or the average temperature of multiple local temperatures within the refrigerator compartment. In some embodiments, the average temperature of the refrigerator compartment can be obtained from multiple local temperatures. When cooling begins, the damper opens, and a cooling cycle occurs between the refrigerator and freezer compartments. If the rate of temperature decrease decreases and the cooling temperature becomes too high, it indicates that the damper has iced up, preventing it from opening properly and thus hindering cooling of the refrigerator compartment. The preset rate is the temperature drop rate under normal refrigerator operation. Assuming the preset rate of temperature drop within a preset time is 5°C under normal refrigerator operation, and the first temperature drop rate within the preset time is 3°C after the cooling cycle starts, the refrigerator temperature has not reached the normal operating temperature, and the first drop rate is less than the preset rate. Therefore, the second content difference between the second operating water molecule content and the initial water molecule content at this time is taken as the preset content threshold, and the second wind speed difference between the second operating fan speed and the initial wind speed is taken as the preset wind speed threshold. In some embodiments, the first temperature drop rate being less than the preset rate may be due to temperature rise caused by abnormal events such as frequent door opening or refrigerator power failure. In this case, it is necessary to rule out the possibility that abnormal events caused the refrigerator temperature drop rate to be less than the preset rate.

[0066] For example, please refer to Figure 3 , Figure 3 This is a schematic diagram of the third process of the damper fault detection method provided in this embodiment. Before obtaining the first rate of decrease of the refrigeration temperature during the refrigeration cycle, the process includes:

[0067] 14. Obtain the second rate of decrease of the refrigeration temperature within the preset range in each of the multiple preset refrigeration cycles after the damper defrosts;

[0068] 15. Determine a preset rate based on multiple second descent rates.

[0069] Specifically, the preset cooling cycle can be the first few cooling cycles, such as the first 2-3 cycles. In the few cooling cycles before the end of defrosting, the refrigerator's air circulation is close to normal, the probability of damper icing is low, and the rate of temperature drop is close to normal. In some embodiments, the second rate of temperature drop can be compared over N consecutive cooling cycles. If the second rate of temperature drop is equal over N consecutive cooling cycles, then the second rate of temperature drop at this time is considered the preset rate. In some embodiments, the second rate of temperature drop over N cycles can be calculated and averaged, and the average value can be used as the preset rate.

[0070] For example, please refer to Figure 4 , Figure 4 This is a schematic diagram of the fourth process of the damper fault detection method provided in this embodiment. After the refrigerator cooling cycle is started, obtaining the first operating water molecule content and the first operating wind speed within the preset range includes:

[0071] 21. After the refrigerator's cooling cycle is started, obtain the temperature of the refrigerator compartment.

[0072] 22. Whenever the temperature of the room drops by a preset temperature value, the first operating water molecule content and the first operating wind speed within a preset range of the adjacent dampers are obtained.

[0073] Specifically, the compartment temperature within the refrigerator refers to the overall temperature within the refrigerator compartment, which changes as the refrigerator cools. After the refrigerator's cooling cycle begins, the operating temperature inside the refrigerator compartment can be re-acquired via a preset interval time or a preset interval temperature. This application uses the acquisition of the refrigerator's operating temperature via a preset interval time as an example. The refrigerator can be equipped with one or more temperature sensors to detect the refrigerator temperature, which can be the local temperature of a target area within the refrigerator compartment or the average temperature of multiple areas within the refrigerator compartment. In some embodiments, multiple temperature sensors can be installed inside the refrigerator to acquire the local temperatures of multiple areas within the refrigerator compartment. The average temperature inside the refrigerator compartment is used as the compartment temperature, and it is determined whether the compartment temperature has decreased by a preset temperature value. The decrease in compartment temperature is used as a condition for acquiring the operating wind speed of the damper based on the water molecule content. It is understood that the compartment temperature changes with the change in water molecule content and wind speed. The preset temperature value can be 1°C. Whenever the compartment temperature decreases by 1°C, the first operating water molecule content and the first operating wind speed within a preset range of adjacent dampers are acquired.

[0074] For example, please refer to Figure 5 , Figure 5 This is a schematic diagram of the fifth step of the damper fault detection method provided in this embodiment. If the first content difference is greater than a preset content threshold and the first wind speed difference is less than a preset wind speed threshold, then determining that the damper has an icing fault includes:

[0075] 31. If the first content difference is greater than the first content threshold and the first wind speed difference is less than the first wind speed threshold, then the damper is determined to be in the first icing state.

[0076] 32. If the first content difference is greater than the second content threshold and the first wind speed difference is less than the second wind speed threshold, then the damper is determined to be in the second icing state, and the amount of icing in the second icing state is greater than the amount of icing in the first icing state.

[0077] Specifically, the first icing state is a partial icing state of the damper, and the second icing state is a complete icing state of the damper. Therefore, the amount of ice in the second icing state is greater than the amount of ice in the first icing state. The first content threshold is greater than a preset content threshold and less than a second content threshold, and the first wind speed threshold is greater than a preset wind speed threshold and less than a second wind speed threshold. Taking the content threshold as an example, the first or second content threshold can be set manually or based on the decrease in refrigeration temperature, such as changing the preset rate. Different preset content thresholds are set according to different second content differences to determine the amount of ice on the damper. The same applies to the first or second wind speed difference. In some embodiments, when the damper experiences a first icing failure, the area of ​​the damper covered by ice is the first area; when the damper experiences a second icing failure, the area of ​​the damper covered by ice is the second area, and the second area is greater than the first area. However, complete icing of the damper does not necessarily mean that 100% of the damper's area is covered by ice. If more than 90% of the damper's area is covered by ice, it can also be considered that the damper is completely iced. In some embodiments, the icing state can also be determined by the ice thickness. When the damper is partially iced, the ice thickness is a first thickness; when the damper is completely iced, the ice thickness is a second thickness, which is greater than the first thickness. Furthermore, in some embodiments, the icing state can also be determined by the remaining area of ​​the duct opening. When the damper is partially iced, the remaining area of ​​the duct opening is a third area; when the damper is completely iced, the remaining area of ​​the duct opening is a fourth area. Because frost blockage reduces the remaining duct area, the fourth area is smaller than the third area.

[0078] For example, please continue reading Figure 5 After determining that the damper is in the first icing state, the following steps are included:

[0079] 311. Perform the damper reset action to obtain the third operating water molecule content and the third operating wind speed within the preset range;

[0080] 312. Obtain the third content difference between the third operating water molecule content and the initial water molecule content, and the third wind speed difference between the third operating wind speed and the initial wind speed;

[0081] 313. When the third content difference is less than the preset content threshold, or the third wind speed difference is greater than the preset wind speed threshold, the damper icing fault is determined to be eliminated.

[0082] After determining that the damper is in the second icing state, the following steps are included:

[0083] 321. Heat the damper to obtain the fourth operating water molecule content and the fourth operating wind speed within the preset range;

[0084] 322. Obtain the fourth content difference between the fourth operating water molecule content and the initial water molecule content, and the fourth wind speed difference between the fourth operating wind speed and the initial wind speed;

[0085] 323. When the fourth content difference is less than the preset content threshold, or the fourth wind speed difference is greater than the preset wind speed threshold, the damper icing fault is determined to be eliminated.

[0086] Specifically, when the damper icing fault is minor, the fault can be eliminated by performing a damper reset. Since the damper lacks a position signal detection device, its actual position cannot be determined once a fault occurs. Therefore, performing a damper reset as a correction procedure ensures the damper is in a controllable position and de-icing occurs during the reset process. During the reset, humidity and concentration sensors continuously acquire the difference between the third operating water molecule content and the initial water molecule content. When this difference is less than a preset content threshold, or the third wind speed difference is greater than a preset wind speed threshold, de-icing is complete under the first icing condition, the damper icing fault is eliminated, and the reset process stops. If the damper icing fault is not eliminated, the reset process continues.

[0087] Specifically, the damper can be heated by a damper heating wire, which is placed around the damper. When the damper is heavily iced, the damper heating wire heats up to heat the damper. To reduce power consumption, the power of the damper heating wire can be 1 to 3W. During the heating process, the humidity sensor and concentration sensor continuously acquire the fourth operating water molecule content and the fourth operating wind speed. When the damper is heated to the point where the fourth content difference is less than the preset content threshold, or the fourth wind speed difference is greater than the preset wind speed threshold, the second icing state de-icing is completed, the damper icing fault is eliminated, and the damper heating wire stops working. If the damper icing fault is not eliminated, the damper heating wire continues to work.

[0088] Please see Figure 6 , Figure 6This is a schematic diagram of the damper fault detection device provided in this application. This application also provides a damper fault detection device 100, comprising:

[0089] 101. A detection module is used to obtain the initial water molecule content and initial wind speed of the adjacent air damper preset range before the refrigerator cooling cycle is started, and to obtain the first operating water molecule content and first operating wind speed of the adjacent air damper preset range after the refrigerator cooling cycle is started.

[0090] 102. Determining module, used to determine the first content difference between the first operating water molecule content and the initial water molecule content, and the first wind speed difference between the first operating wind speed and the initial wind speed;

[0091] 103. Judgment module: If the first content difference is greater than the preset content threshold and the first wind speed difference is less than the preset wind speed threshold, then it is determined that the damper has an icing fault. If the first content difference is less than the preset content threshold or the first wind speed difference is greater than the preset wind speed threshold, then it is determined that the damper has not an icing fault.

[0092] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the damper fault detection method as described above.

[0093] Please see Figure 7 , Figure 7 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 202 stores a computer program, and the processor 201 executes the damper fault detection method described above by calling the computer program.

[0094] 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 can be disposed at the air duct opening to control the connection and isolation of 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. A concentration sensor and a humidity sensor are also disposed near the air damper to obtain the water molecule content and molecular concentration within a preset range adjacent to the air damper.

[0095] 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.

[0096] 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.

[0097] The above provides a detailed description of the damper fault detection method, apparatus, computer-readable storage medium, and refrigerator provided in the embodiments of this application. 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 method 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 method for detecting damper malfunctions, applied to a refrigerator, the refrigerator including a refrigerator compartment, the refrigerator compartment being provided with a damper, characterized in that, The method includes: Before the refrigerator's cooling cycle begins, the initial water molecule content and initial wind speed within a preset range of adjacent air vents are obtained. After the refrigerator's cooling cycle is started, the first operating water molecule content and the first operating wind speed within the preset range are obtained, and the first content difference between the first operating water molecule content and the initial water molecule content, and the first wind speed difference between the first operating wind speed and the initial wind speed are determined. If the first content difference is greater than a preset content threshold and the first wind speed difference is less than a preset wind speed threshold, then it is determined that the damper has an icing failure. If the first content difference is less than the preset content threshold, or the first wind speed difference is greater than the preset wind speed threshold, then it is determined that the damper has not experienced an icing failure.

2. The damper fault detection method according to claim 1, characterized in that, Before obtaining the first operating water molecule content and the first operating wind speed within the preset range, the method further includes: Obtain the first rate of decrease of the refrigeration temperature within the preset range during the refrigeration cycle; When the first descent rate is less than the preset rate, the current second operating water molecule content and second operating wind speed within the preset range are obtained, and the second content difference between the second operating water molecule content and the initial water molecule content, and the second wind speed difference between the second operating wind speed and the initial wind speed are determined. The second content difference is determined to be the preset content threshold, and the second wind speed difference is determined to be the preset wind speed threshold.

3. The damper fault detection method according to claim 2, characterized in that, Before obtaining the first rate of decrease of the refrigeration temperature within the preset range during the refrigeration cycle, the following steps are included: The second rate of decrease of the refrigeration temperature within the preset range is obtained in each of the multiple preset refrigeration cycles after the damper defrosts. A preset rate is determined based on a plurality of second descent rates.

4. The damper fault detection method according to claim 1, characterized in that, After the refrigerator's cooling cycle is started, obtaining the first operating water molecule content and the first operating wind speed within the preset range includes: After the refrigerator's cooling cycle is started, the temperature inside the refrigerator compartment is obtained; Whenever the temperature of the room drops to a preset temperature value, the first operating water molecule content and the first operating wind speed within the preset range are obtained.

5. The damper fault detection method according to claim 1, characterized in that, The step of obtaining the initial water molecule content and initial wind speed within a preset range adjacent to the dampers includes: Before the refrigerator's cooling cycle begins, the initial target gas concentration passing through the damper per unit time is obtained, and the initial wind speed is determined based on the initial target gas concentration. The process of obtaining the first operating water molecule content and the first operating wind speed within the preset range includes: After the refrigerator's cooling cycle is started, the concentration of the target gas passing through the damper per unit time is obtained, and the first operating wind speed is determined based on the target gas concentration.

6. The damper fault detection method according to claim 1, characterized in that, The step of determining that the damper has icing fault if the first content difference is greater than a preset content threshold and the first wind speed difference is less than a preset wind speed threshold includes: If the first content difference is greater than the first content threshold and the first wind speed difference is less than the first wind speed threshold, then the damper is determined to be in the first icing state. If the first content difference is greater than the second content threshold and the first wind speed difference is less than the second wind speed threshold, then the damper is determined to be in the second icing state, and the amount of icing in the second icing state is greater than the amount of icing in the first icing state. Wherein, the first content threshold is greater than the preset content threshold and less than the second content threshold, and the first wind speed threshold is greater than the preset wind speed threshold and less than the second wind speed threshold.

7. The damper fault detection method according to claim 6, characterized in that, After determining that the damper is in the first icing state, the following steps are included: Perform the damper reset action to obtain the third operating water molecule content and the third operating wind speed within the preset range; Obtain the third content difference between the third operating water molecule content and the initial water molecule content, and the third wind speed difference between the third operating wind speed and the initial wind speed; When the third content difference is less than the preset content threshold, or the third wind speed difference is greater than the preset wind speed threshold, it is determined that the damper icing fault has been eliminated. After determining that the damper is in the second icing state, the following steps are included: The damper is heated to obtain the fourth operating water molecule content and the fourth operating wind speed within the preset range; Obtain the fourth content difference between the fourth operating water molecule content and the initial water molecule content, and the fourth wind speed difference between the fourth operating wind speed and the initial wind speed; When the fourth content difference is less than the preset content threshold, or the fourth wind speed difference is greater than the preset wind speed threshold, the damper icing fault is determined to be eliminated.

8. A damper fault detection device, characterized in that, include: The detection module is used to obtain the initial water molecule content and initial wind speed of the adjacent air vents within a preset range before the refrigerator cooling cycle is started, and to obtain the first operating water molecule content and first operating wind speed of the preset range after the refrigerator cooling cycle is started. The determining module is used to determine a first content difference between the first operating water molecule content and the initial water molecule content, and a first wind speed difference between the first operating wind speed and the initial wind speed; The judgment module determines that the damper has an icing fault if the first content difference is greater than a preset content threshold and the first wind speed difference is less than a preset wind speed threshold; otherwise, it determines that the damper has not an icing fault.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the damper fault detection method as described in any one of claims 1 to 7.

10. A refrigerator, comprising a processor and a memory, wherein the memory has a computer program, characterized in that, The processor executes the damper fault detection method as described in any one of claims 1 to 7 by invoking the computer program.

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