Fan monitoring method and device, refrigerator and computer readable storage medium

Abstract

The application provides a fan monitoring method and device, a refrigerator and a computer readable storage medium. The application is applied to a refrigeration equipment, and the refrigeration equipment comprises an ultrasonic sensor and a fan. The ultrasonic sensor is arranged on the periphery of the fan and comprises the following steps: obtaining a target vibration signal collected by the ultrasonic sensor; and determining the running state of the fan according to the target vibration signal. The fan monitoring method provided by the application can collect the sound vibration signal emitted by the fan during operation through the ultrasonic sensor arranged on the periphery of the fan, analyze the sound vibration signal of the fan, detect the running state of the fan, and determine whether the fan is abnormal, thereby ensuring the real-time performance and accuracy of fan monitoring.

Description

Technical Field

[0001] This application relates to the field of electrical technology, specifically to a fan monitoring method, device, refrigerator, and computer-readable storage medium. Background Technology

[0002] The fan is a crucial component in refrigerator refrigeration technology, its main function being to evenly distribute cold air throughout the refrigerator's interior. Existing fan monitoring methods cannot accurately reflect the fan's operating status in real time. Therefore, a more real-time, accurate, and reliable monitoring method is needed. Summary of the Invention

[0003] This application provides a wind turbine monitoring method that can effectively monitor the operating status of wind turbines.

[0004] In a first aspect, this application provides a fan monitoring method applied to a refrigeration device, the refrigeration device including an ultrasonic sensor and a fan, the ultrasonic sensor being disposed around the fan, the method comprising:

[0005] The target vibration signal collected by the ultrasonic sensor is acquired.

[0006] The operating status of the fan is determined based on the target vibration signal.

[0007] In some embodiments of this application, acquiring the target vibration signal collected by the ultrasonic sensor includes:

[0008] Determine the sampling frequency and sampling time;

[0009] The ultrasonic sensor is controlled to acquire the target vibration signal based on the sampling frequency and the sampling time.

[0010] In some embodiments of this application, determining the operating state of the fan based on the target vibration signal includes:

[0011] The target vibration signal is analyzed to determine the air flow rate and air density information around the fan.

[0012] The operating status of the fan is determined based on the air flow rate and the air density information.

[0013] In some embodiments of this application, determining the operating state of the fan based on the airflow rate and the air density information includes:

[0014] If the airflow rate is less than the target rate threshold or the air density information is greater than the target density threshold, the operating state of the fan is determined to be icing.

[0015] In some embodiments of this application, after determining that the operating state of the fan is an icing state, the method further includes:

[0016] The control target alarm device outputs a first alarm message; the first alarm message is used to indicate that the operating state of the fan is an icing state.

[0017] In some embodiments of this application, after determining that the operating state of the fan is an icing state, the method further includes:

[0018] Control the fan to stop.

[0019] In some embodiments of this application, before acquiring the target vibration signal collected by the ultrasonic sensor, the method further includes:

[0020] The fan is started and the initial vibration signal is collected by the ultrasonic sensor.

[0021] Based on the initial vibration signal, determine whether the fan has started normally;

[0022] If the fan fails to start normally, the control target alarm device outputs a second alarm message; the second alarm message is used to prompt the user to check the status of the fan.

[0023] Secondly, this application also provides a fan monitoring device applied to refrigeration equipment, the refrigeration equipment including an ultrasonic sensor and a fan, the ultrasonic sensor being disposed around the fan, the device comprising:

[0024] The acquisition module is used to acquire the target vibration signal collected by the ultrasonic sensor;

[0025] The processing module is used to determine the operating status of the fan based on the target vibration signal.

[0026] Thirdly, this application also provides a refrigerator, the refrigerator including a processor, a memory and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the steps in any of the fan monitoring methods described above.

[0027] Fourthly, this application also provides a computer-readable storage medium storing a computer program that is executed by a processor to implement the steps in any of the wind turbine monitoring methods described above.

[0028] The wind turbine monitoring method provided in this application can collect the sound vibration signals emitted by the wind turbine during operation by using ultrasonic sensors installed around the wind turbine. By analyzing the sound vibration signals of the wind turbine, the operating status of the wind turbine can be detected, thereby determining whether the wind turbine is abnormal, ensuring the real-time and accuracy of wind turbine monitoring. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a wind turbine monitoring system provided in the embodiments of this application;

[0031] Figure 2 This is a schematic flowchart of one embodiment of the wind turbine monitoring method in this application;

[0032] Figure 3 This is a schematic diagram of a functional module of the wind turbine monitoring device in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the refrigerator structure in an embodiment of this application. Detailed Implementation

[0034] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. Furthermore, it is understood that in the specific embodiments of this application, user information, user data, and other related data are involved. When the above embodiments of this application are applied to specific products or technologies, user permission or consent is required, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions.

[0037] To enable any person skilled in the art to implement and use this application, the following description is provided. In this description, details are set forth for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0038] This application provides a wind turbine monitoring method, device, equipment, and storage medium, which are described in detail below.

[0039] Please see Figure 1 , Figure 1 This is a schematic diagram of a fan monitoring system provided in an embodiment of this application. The fan monitoring system may include a refrigerator 100. Figure 1 The refrigerator 100 in the application can be used to obtain the storage-related control logic in the refrigerator 100 in order to execute the fan monitoring method in this application.

[0040] In this embodiment of the application, the refrigerator 100 may include, but is not limited to, a double-door refrigerator, a single-door refrigerator, a freezer, etc.

[0041] It should be noted that, Figure 1 The schematic diagram of the wind turbine monitoring system shown is merely an example. The wind turbine monitoring system and scenario described in this application are intended to more clearly illustrate the technical solutions of this application and do not constitute a limitation on the technical solutions provided in this application. As those skilled in the art will know, with the evolution of wind turbine monitoring systems and the emergence of new business scenarios, the technical solutions provided in this application are also applicable to similar technical problems.

[0042] like Figure 2 As shown, Figure 2This is a schematic flowchart of one embodiment of the fan monitoring method in this application. The method is applied to a refrigeration device, which includes an ultrasonic sensor and a fan. The ultrasonic sensor is disposed on the periphery of the fan. The method specifically includes the following steps 201-202:

[0043] 201. Obtain the target vibration signal collected by the ultrasonic sensor.

[0044] In this embodiment, the fan generates sound vibration signals when it is in operation. Therefore, the ultrasonic sensor installed around the fan can collect the sound vibration signals, especially some sound vibration signals that are inaudible to the human ear, such as ultrasound. When the fan starts, the ultrasonic sensor can be activated to collect the sound vibration signals generated by the fan during operation, which is the target vibration signal in this embodiment.

[0045] Furthermore, it should be noted that the structure of the fan section varies depending on the model of the refrigeration equipment. Therefore, the installation position of the ultrasonic sensor needs to be determined according to the layout of the fan. This application does not limit the specific installation position. Additionally, the distance between the ultrasonic sensor and the fan can be approximately 5 centimeters to ensure that the collected vibration signal best matches the ideal state.

[0046] 202. Determine the operating status of the fan based on the target vibration signal.

[0047] When a fan malfunctions, the sound vibrations it produces during rotation differ from those during normal operation. Therefore, the acquired target vibration signal can be compared with pre-stored abnormal vibration signals. For example, the system can store abnormal vibration signals corresponding to fan icing, loose fan blades, and excessive rotor friction due to lack of lubrication during fan rotation, etc. Specific examples in this application will not be listed here. At this time, the currently acquired target vibration signal is compared with vibration signals of each abnormal type to determine the fan's operating status. When the target vibration signal does not match any of the abnormal vibration signals, it can be determined that the fan is in normal operating condition. Otherwise, if the target vibration signal matches a specific type of abnormal vibration signal, it can be determined that a specific abnormality has occurred in the fan. For example, if the current target vibration signal matches the abnormal vibration signal corresponding to loose fan blades, it can be determined that the fan blades are loose.

[0048] The wind turbine monitoring method provided in this application can collect the sound vibration signals emitted by the wind turbine during operation by using ultrasonic sensors installed around the wind turbine. By analyzing the sound vibration signals of the wind turbine, the operating status of the wind turbine can be detected, thereby determining whether the wind turbine is abnormal, ensuring the real-time and accuracy of wind turbine monitoring.

[0049] To better implement the embodiments of this application, in one embodiment of this application, acquiring the target vibration signal collected by the ultrasonic sensor includes:

[0050] Determine the sampling frequency and sampling time; based on the sampling frequency and sampling time, control the ultrasonic sensor to acquire the target vibration signal.

[0051] The above embodiments provide a scheme for determining the operating state of a fan based on a target vibration signal. However, to facilitate subsequent processing, analysis, storage, and sharing, this application also provides a sampling scheme. When sampling the vibration signal, a set sampling method can be used to sample the vibration signal and convert it into a discrete digital signal.

[0052] Specifically, in this embodiment, the sampling frequency can be 1000Hz and the sampling time can be 10 seconds. Each time the ultrasonic wave is activated, the vibration signal of the fan is sampled according to this sampling frequency and sampling time. After each sampling, the working fan can be sampled again after a target time interval, such as 2 minutes or 5 minutes. This embodiment does not limit the length of the target time interval. This also saves storage space and avoids the system storing too many target vibration signals.

[0053] Furthermore, in this embodiment, controlling the ultrasonic sensor to acquire the target vibration signal based on the sampling frequency and sampling time may also include controlling the ultrasonic sensor to acquire the target vibration signal based on the sampling frequency, sampling time, and the target operating frequency of the ultrasonic sensor. The target operating frequency can be a user-defined operating frequency, such as 40kHz, and this embodiment does not limit the target operating frequency.

[0054] To better implement the embodiments of this application, in one embodiment, determining the operating state of the fan based on the target vibration signal includes:

[0055] The target vibration signal is analyzed to determine the airflow rate and air density information around the fan; based on the airflow rate and air density information, the operating status of the fan is determined.

[0056] The above embodiments provide a scheme for determining the working status by comparing the target vibration signal with various stored abnormal vibration signals. The advantage of this scheme is its ability to accurately identify specific abnormal problems. However, storing various abnormal vibration signals requires a certain amount of storage space. Therefore, this application also provides a scheme.

[0057] Specifically, since the target vibration signal is essentially the air vibration frequency collected by the ultrasonic sensor when air flows through it, the airflow rate and air density can be determined based on the target vibration signal, i.e., the vibration frequency. In this case, if the fan is operating normally, for example at speed level 5, it should theoretically have a normal wind speed. If the airflow rate analyzed from the target vibration signal is less than the wind speed expected at speed level 5, it proves that the fan speed cannot reach level 5, indicating a possible malfunction in the fan control.

[0058] Simultaneously, to avoid errors in judgment, air density information also needs to be considered. For example, under normal circumstances, the higher the wind speed, the lower the air density should be, because the fan is working normally. If the fan speed is abnormal, the wind speed decreases, and the air density increases. Based on this, density information can be combined with wind speed detection. For example, if the air density is less than the density corresponding to level 5, the fan malfunction can be further confirmed. If both judgments show an abnormality, the result is output as the fan's operating state is abnormal. Alternatively, if both wind speed and density detections determine that the fan is normal, the result is output as the fan is in normal working state. Or, if either wind speed or density detection determines that the fan is abnormal, the current detection result can be temporarily ignored. After a target time period, the detection is repeated. If after N detections, such as 3 or 5 times, the result is still that either wind speed or density detection determines the fan is abnormal, then the result is output as the fan is in an abnormal operating state.

[0059] To better implement the embodiments of this application, in one embodiment, the operating state of the fan is determined based on air flow rate and air density information, including:

[0060] If the airflow rate is less than the target rate threshold or the air density information is greater than the target density threshold, the fan's operating state is determined to be icing.

[0061] The above embodiments provide a scheme for determining the operating status of a fan based on airflow rate and air density information. However, in cases of icing anomalies, it is not necessary to consider both situations simultaneously. In this case, if either the airflow rate or the air density is abnormal, it can be directly determined that the fan is experiencing an icing anomaly. Therefore, in this embodiment, if the fan monitoring is only used to detect icing anomalies, the determination can be made based on only one of the criteria.

[0062] The target velocity threshold can be 0.5 m / s, and the target density threshold can be 1.2 kg / m³. Of course, other thresholds can also be set, and this application embodiment does not limit them.

[0063] To better implement the embodiments of this application, in one embodiment of this application, after determining that the operating state of the fan is an icing state, the method further includes:

[0064] The control target alarm device outputs the first alarm information; the first alarm information is used to indicate that the operating state of the fan is icing.

[0065] The above embodiments provide a solution for monitoring whether a fan is in an icing state. To ensure users notice fan abnormalities and prevent damage, this application also provides a solution for outputting an alarm message corresponding to the icing abnormality, i.e., a first alarm message, when the fan is confirmed to be icing. Specifically, if it is determined that the fan is icing, the words "Fan Icing" can be displayed on the display control panel of the refrigeration equipment. Alternatively, if the refrigeration equipment is connected to the user's mobile phone via the Internet of Things (IoT), the fan icing abnormality information can be sent to the user's mobile phone. In this specific embodiment, the form of the alarm is not limited.

[0066] It should also be noted that the above embodiments also describe how this application can determine different types of anomalies. Therefore, similarly, alarms can also be issued based on specific anomaly types, for example, issuing alarms for the corresponding specific anomaly information in the manner described above, which will not be elaborated further here.

[0067] To better implement the embodiments of this application, in one embodiment of this application, after determining that the operating state of the fan is an icing state, the method further includes: controlling the fan to stop.

[0068] To prevent the fan from continuing to operate under abnormal conditions, the fan can be shut down. This can be done in any way, such as the processor of the refrigeration equipment determining that the fan is abnormal and issuing a fan shutdown command. This application embodiment will not elaborate on this.

[0069] To better implement the embodiments of this application, in one embodiment of this application, before acquiring the target vibration signal collected by the ultrasonic sensor, the method further includes:

[0070] The system controls the fan to start and collects the initial vibration signal through an ultrasonic sensor; based on the initial vibration signal, it determines whether the fan has started normally; if the fan has not started normally, the control target alarm device outputs a second alarm message; the second alarm message is used to prompt the user to check the fan status.

[0071] The above embodiments provide a scheme for determining the operating status of a fan based on vibration signals. However, in some cases, after receiving a start command, the fan may be completely stationary due to damage. In this situation, there is no air vibration. Therefore, the ultrasonic sensor cannot collect vibration signals. Thus, if the initial vibration signal collected is 0Hz, or only a few hertz, it proves that the fan cannot effectively drive airflow, indicating that the fan is not working. In this case, a non-working alarm can be issued, i.e., a second alarm message, informing the user that the fan is not working and prompting the user to check the fan themselves. Similarly, the alarm method can be the same as described above, and will not be repeated here.

[0072] To better implement the fan monitoring method in this application embodiment, this application embodiment also provides a fan monitoring device applied to refrigeration equipment. The refrigeration equipment includes an ultrasonic sensor and a fan. The ultrasonic sensor is disposed around the fan, specifically as follows: Figure 3 As shown, the device 300 includes:

[0073] Acquisition module 301 is used to acquire the target vibration signal collected by the ultrasonic sensor;

[0074] The processing module 302 is used to determine the operating status of the fan based on the target vibration signal.

[0075] The wind turbine monitoring device provided in this application has an acquisition module 301 that can collect sound vibration signals emitted by the wind turbine during operation through ultrasonic sensors installed around the wind turbine. Then, the processing module 302 can analyze the sound vibration signals to detect the wind turbine's operating status, thereby determining whether the wind turbine is malfunctioning, ensuring the real-time performance and accuracy of wind turbine monitoring.

[0076] In some embodiments of this application, the acquisition module 301 is specifically used for:

[0077] Determine the sampling frequency and sampling time;

[0078] The ultrasonic sensor is controlled to collect the target vibration signal based on the sampling frequency and sampling time.

[0079] In some embodiments of this application, the processing module 302 is specifically used for:

[0080] The vibration signal of the target is analyzed to determine the air flow rate and air density information around the fan;

[0081] The operating status of the fan is determined based on the air flow rate and air density information.

[0082] In some embodiments of this application, the processing module 302 is specifically used for:

[0083] If the airflow rate is less than the target rate threshold or the air density information is greater than the target density threshold, the fan's operating state is determined to be icing.

[0084] In some embodiments of this application, the processing module 302 is specifically used for:

[0085] The control target alarm device outputs the first alarm information; the first alarm information is used to indicate that the operating state of the fan is icing.

[0086] In some embodiments of this application, the processing module 302 is specifically used for:

[0087] Control the fan to stop.

[0088] In some embodiments of this application, the processing module 302 is specifically used for:

[0089] The system controls the start-up of the fan and collects the initial vibration signal through an ultrasonic sensor.

[0090] Based on the initial vibration signal, determine whether the fan has started normally;

[0091] If the fan fails to start normally, the control target alarm device will output a second alarm message; the second alarm message is used to prompt the user to check the status of the fan.

[0092] This application also provides a refrigerator, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor. The processor executes the computer program to implement the steps of any of the fan monitoring methods in this application. This refrigerator integrates any of the fan monitoring methods provided in this application, such as... Figure 4 As shown, it illustrates a structural schematic diagram of the refrigerator involved in an embodiment of this application. Specifically:

[0093] The refrigerator may include components such as a processor 401 with one or more processing cores, a memory 402 with one or more computer-readable storage media, a power supply 403, and an input unit 404. Those skilled in the art will understand that... Figure 4 The refrigerator structure shown does not constitute a limitation on the refrigerator and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein:

[0094] The processor 401 is the control center of the refrigerator. It connects to various parts of the refrigerator via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 402, and by calling data stored in the memory 402, it performs various functions and processes data, thereby providing overall monitoring of the refrigerator. Optionally, the processor 401 may include one or more processing cores. The processor 401 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. Preferably, the processor 401 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and application programs, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 401.

[0095] The memory 402 can be used to store software programs and modules. The processor 401 executes various functional applications and data processing by running the software programs and modules stored in the memory 402. The memory 402 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created based on the use of the refrigerator, etc. In addition, the memory 402 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 402 may also include a memory controller to provide the processor 401 with access to the memory 402.

[0096] The refrigerator also includes a power supply 403 that supplies power to the various components. Preferably, the power supply 403 can be logically connected to the processor 401 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 403 may also include one or more DC or AC power supplies, a recharging system, a power fault detection circuit, a power converter or inverter, a power status indicator, or any other components.

[0097] The refrigerator may also include an input unit 404, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0098] Although not shown, the refrigerator may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 401 in the refrigerator loads the executable files corresponding to the processes of one or more application programs into the memory 402 according to the following instructions, and the processor 401 runs the application programs stored in the memory 402 to realize various functions, such as:

[0099] Acquire the target vibration signal collected by the ultrasonic sensor;

[0100] The operating status of the fan is determined based on the target vibration signal.

[0101] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0102] Therefore, embodiments of this application provide a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), a disk, or an optical disk, etc. A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in any of the wind turbine monitoring methods provided in embodiments of this application. For example, the computer program loaded by the processor can execute the following steps:

[0103] Acquire the target vibration signal collected by the ultrasonic sensor;

[0104] The operating status of the fan is determined based on the target vibration signal.

[0105] 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 detailed descriptions of other embodiments above, which will not be repeated here.

[0106] In practice, each of the above units or structures can be implemented as an independent entity or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of each of the above units or structures, please refer to the previous method embodiments, which will not be repeated here.

[0107] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0108] The wind turbine monitoring method and device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this application. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method of monitoring a fan, the method comprising: The method is applied to a refrigeration device, the refrigeration device comprising an ultrasonic sensor and a fan, the ultrasonic sensor being arranged on the periphery of the fan, and the method comprising: acquiring a target vibration signal collected by the ultrasonic sensor; determining an operating state of the fan according to the target vibration signal; the step of determining the operating state of the fan according to the target vibration signal comprises: analyzing the target vibration signal to determine air flow rate and air density information on the periphery of the fan; determining the operating state of the fan according to the air flow rate and the air density information; the step of determining the operating state of the fan according to the air flow rate and the air density information comprises: if the air flow rate is less than a target rate threshold or the air density information is greater than a target density threshold, determining that the operating state of the fan is an icing state.

2. The fan monitoring method of claim 1, wherein the step of acquiring the target vibration signal collected by the ultrasonic sensor comprises: determining a sampling frequency and a sampling time; controlling the ultrasonic sensor to collect the target vibration signal according to the sampling frequency and the sampling time.

3. The fan monitoring method of claim 1, wherein after determining that the operating state of the fan is the icing state, the method further comprises: controlling a target alarm device to output first alarm information; the first alarm information is used to represent that the operating state of the fan is the icing state.

4. The fan monitoring method of claim 1, wherein after determining that the operating state of the fan is the icing state, the method further comprises: controlling the fan to stop.

5. The fan monitoring method of claim 1, wherein before acquiring the target vibration signal collected by the ultrasonic sensor, the method further comprises: controlling the fan to start and collecting an initial vibration signal by the ultrasonic sensor; determining whether the fan is started normally based on the initial vibration signal; if the fan is not started normally, controlling a target alarm device to output second alarm information; the second alarm information is used to prompt a user to detect the state of the fan.

6. A fan monitoring device, characterized by The device is applied to a refrigeration device, the refrigeration device comprising an ultrasonic sensor and a fan, the ultrasonic sensor being arranged on the periphery of the fan, and the device comprising: an acquisition module, configured to acquire a target vibration signal collected by the ultrasonic sensor; a processing module, configured to determine an operating state of the fan according to the target vibration signal; the step of determining the operating state of the fan according to the target vibration signal comprises: analyzing the target vibration signal to determine air flow rate and air density information on the periphery of the fan; determining the operating state of the fan according to the air flow rate and the air density information; the step of determining the operating state of the fan according to the air flow rate and the air density information comprises: if the air flow rate is less than a target rate threshold or the air density information is greater than a target density threshold, determining that the operating state of the fan is an icing state.

7. A refrigerator characterized by comprising: The refrigerator comprises a processor, a memory, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the steps of the fan monitoring method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the steps in the fan monitoring method of any one of claims 1 to 5.

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