A foreign object detection device, control method and circulating fan

Abstract

This invention discloses a foreign object detection device, a control method, and a circulating fan. The device includes: a strong magnetic sheet fixedly mounted on the blades of the circulating fan; an induction coil disposed on the edge of the fan's shield; a micro-current sensor connected to the induction coil for collecting the induced current generated in the induction coil; and a main control chip connected to the micro-current sensor for determining whether a foreign object has entered the circulating fan based on the induced current collected by the micro-current sensor. Upon detection of a foreign object, the chip controls the circulating fan's motor to stop. This invention avoids damage to the motor or surrounding people or objects caused by foreign objects entering the circulating fan, improves the safety and stability of the circulating fan, extends its service life, and also avoids noise caused by foreign objects, thus improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more specifically, to a foreign object detection device, a control method, and a circulating fan. Background Technology

[0002] A circulation fan is a household appliance specifically designed to optimize indoor airflow. Compared to traditional electric fans, circulation fans typically have a stronger, more concentrated airflow and can distribute air evenly throughout the room, thereby improving indoor air circulation efficiency, helping to quickly cool or heat the room, and improving indoor air quality. Circulation fans are mostly designed for low noise, suitable for extended use, and applicable to various settings such as homes and offices.

[0003] Although existing circulating fans have a mesh structure, the large mesh size still poses a risk of foreign objects such as children's fingers or flying objects entering the circulating fan. If a living object enters the circulating fan, it may be accidentally injured; if an inanimate flying object enters the circulating fan, it may damage the fan's motor, fan blades, etc., causing fire or electric shock hazards. If foreign objects are ejected rapidly from inside the circulating fan's mesh, they may also pose a threat to the external environment or people.

[0004] There is currently no effective solution to the problem that if foreign objects enter the circulating fan while its blades are rotating, it can cause damage to the motor itself or to people or objects in the vicinity. Summary of the Invention

[0005] This invention provides a foreign object detection device, a control method, and a circulating fan to solve the problem in the prior art where foreign objects entering the circulating fan during its rotation can cause damage to the motor or to people or objects in the vicinity.

[0006] To solve the above-mentioned technical problems, the present invention provides a foreign object detection device for use in a circulating fan, the device comprising:

[0007] A strong magnetic sheet is fixedly mounted on the blades of the circulating fan;

[0008] An induction coil is disposed on the edge of the fan face shield of the circulating fan;

[0009] A microcurrent sensor, connected to the induction coil, is used to collect the induced current generated in the induction coil;

[0010] The main control chip is connected to the micro-current sensor and is used to determine whether a foreign object has entered the circulation fan based on the induced current generated in the induction coil collected by the micro-current sensor. When it is determined that a foreign object has entered the circulation fan, the main control chip controls the motor of the circulation fan to stop.

[0011] Furthermore, the main control chip is used for:

[0012] When a change in the induced current generated in the induction coil is detected, it is determined whether a gear shift has occurred;

[0013] When a change in the induced current generated in the induction coil is detected, it is determined whether a gear shift has occurred;

[0014] If no gear shift occurs, it is confirmed that a foreign object has entered the circulation fan;

[0015] If a gear shift occurs, it is determined whether the change in current is greater than the change in current caused by the gear shift. If so, it is determined that a foreign object has entered the circulation fan. If not, it is determined that no foreign object has entered the circulation fan. The current change when switching from any gear to any other gear is pre-stored.

[0016] Furthermore, the device also includes:

[0017] An alarm device, connected to the main control chip, is used to issue an alarm when it is determined that a foreign object has entered the circulation fan.

[0018] The present invention also provides a circulating fan, including the above-mentioned foreign object detection device.

[0019] The present invention also provides a control method applied to the above-mentioned foreign object detection device, the control method comprising:

[0020] Obtain the induced current generated in the induction coil;

[0021] The presence of foreign objects in the circulation fan is determined based on the induced current generated in the induction coil collected by the microcurrent sensor.

[0022] Once it is confirmed that a foreign object has entered the circulation fan, the motor in the circulation fan is stopped.

[0023] Furthermore, determining whether foreign objects have entered the circulation fan based on the induced current generated in the induction coil collected by the micro-current sensor includes:

[0024] When a change in the induced current generated in the induction coil is detected, it is determined whether a gear shift has occurred;

[0025] If no gear shift occurs, it is confirmed that a foreign object has entered the circulation fan;

[0026] If a gear shift occurs, determine whether the change in current is greater than the change in current caused by the gear shift. If yes, it is determined that a foreign object has entered the circulation fan. If no, it is determined that no foreign object has entered the circulation fan. The current change when switching from any gear to any other gear is pre-stored.

[0027] Furthermore, determining whether a foreign object has entered the circulation fan based on the induced current generated in the induction coil collected by the micro-current sensor also includes:

[0028] Calculate the instantaneous conversion rate of the induced current;

[0029] The instantaneous change rate is used to determine whether foreign objects have entered the circulation fan.

[0030] Further, determining whether foreign objects have entered the circulating fan based on the instantaneous conversion rate includes:

[0031] Determine whether the instantaneous change rate is greater than a preset threshold;

[0032] If so, it confirms that a foreign object has entered the circulation fan;

[0033] If not, then it is confirmed that no foreign objects have entered the circulation fan.

[0034] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the above-described control method.

[0035] The present invention also provides an electronic device, comprising:

[0036] One or more processors;

[0037] A storage device for storing one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the above-described control method.

[0038] By applying the technical solution of this invention, a strong magnetic sheet is set on the blades of a circulating fan, and an induction coil is set on the edge of the fan's shield. The strong magnetic sheet generates a changing magnetic field when the blades rotate, thus generating a corresponding induced current in the induction coil. The induction coil is connected to a micro-current sensor, which detects and records the changes in the induced current generated within the coil. Because the magnetic field is altered when a foreign object enters the circulating fan, the induced current in the induction coil changes significantly compared to normal conditions. Therefore, by monitoring the changes in the induced current, it is possible to determine whether a foreign object has entered the circulating fan, and the motor can be stopped promptly when such an object is detected. Real-time monitoring of the induced current changes allows for timely detection of the risk of foreign object entry. Once an abnormal current fluctuation is detected, the main control chip immediately stops the circulating fan motor, thus taking immediate action before or at the initial stage of foreign object entry to prevent greater safety hazards, such as flying debris or motor overheating, caused by the foreign object in the high-speed rotating blades. Timely stopping of the motor prevents foreign objects from jamming the blades or motor, reducing mechanical damage and extending the service life of the circulating fan. Real-time monitoring and timely handling can prevent sudden shutdowns caused by foreign objects, improving equipment stability and reliability and enhancing the user experience. Foreign objects entering the fan blades may cause abnormal noise during operation; real-time detection and handling can prevent this, maintaining smooth and quiet operation. In summary, the solution in this embodiment prevents damage to the motor or surrounding people or objects caused by foreign objects entering the circulating fan, improving the safety and stability of the circulating fan, extending its service life, and avoiding noise caused by foreign objects, thus enhancing the user experience. Attached Figure Description

[0039] Figure 1 This is a structural diagram of a foreign object detection device according to an embodiment of the present invention;

[0040] Figure 2 A flowchart of a control method according to an embodiment of the present invention;

[0041] Figure 3 A flowchart illustrating the process of determining whether foreign objects have entered the circulation step fan according to an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0044] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0045] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0046] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0047] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0048] The optional embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0049] Example 1

[0050] Although existing circulating fans have a mesh structure, the large mesh size still poses a risk of foreign objects such as children's fingers or flying objects entering the circulating fan. If a living object enters the circulating fan, it may be accidentally injured; if an inanimate flying object enters the circulating fan, it may damage the fan's motor, fan blades, etc., causing fire or electric shock hazards. If foreign objects are ejected rapidly from inside the circulating fan's mesh, they may also pose a threat to the external environment or people.

[0051] To address the problem in existing circulating fans where foreign objects entering the fan blades can damage the motor or injure nearby people or objects, this embodiment provides a foreign object detection device for use in circulating fans. Figure 1 This is a structural diagram of a foreign object detection device according to an embodiment of the present invention, as shown below. Figure 1 As shown, the device includes: a strong magnetic sheet 1, fixedly mounted on the blades 2 of the circulating fan; an induction coil 3, mounted on the edge of the fan cover 4 of the circulating fan; a micro-current sensor 5, connected to the induction coil 3, used to collect the induced current generated in the induction coil 3; and a main control chip 6, connected to the micro-current sensor 5, used to determine whether a foreign object has entered the circulating fan based on the induced current generated in the induction coil 3 collected by the micro-current sensor 5, and to control the motor 7 of the circulating fan to stop when it is determined that a foreign object has entered the circulating fan.

[0052] The working principle of this embodiment is as follows: An induction coil 3 is set at the edge of the circulating fan cover, and a strong magnetic sheet 1 is set on the circulating fan blades. When the blades rotate, the strong magnetic sheet 1 generates a changing magnetic field, thereby generating a corresponding induced current in the induction coil. The induction coil is connected to a micro-current sensor, which is responsible for detecting and recording the changes in the induced current passing through the induction coil. In this way, the current output of the circulating fan under different operating conditions can be monitored in real time. First, the output current of the circulating fan when it is operating stably and normally at each speed is recorded. These reference current data will serve as reference values ​​for subsequent detection. After the circulating fan is running stably, the micro-current sensor will continuously output real-time current data and compare it with the set reference current, recording the changes. The changes in current are used to determine whether any foreign objects have entered the circulating fan.

[0053] In this embodiment, the foreign object detection device has a strong magnetic sheet 1 on the fan blade 2 and an induction coil 3 on the edge of the fan cover 4. The strong magnetic sheet 1 generates a changing magnetic field when the fan blade rotates, thereby generating a corresponding induced current in the induction coil 3. The induction coil 3 is connected to a micro-current sensor 5, which detects and records the changes in the induced current generated in the induction coil. Since the magnetic field changes when a foreign object enters the fan, the induced current in the induction coil changes significantly compared to normal conditions. Therefore, by monitoring the changes in the induced current, it is possible to determine whether a foreign object has entered the fan, and the motor can be stopped promptly when a foreign object enters. This solution achieves the following effects: First, by monitoring the changes in the induced current in real time, the risk of foreign object entry can be detected in a timely manner. Once an abnormal current fluctuation is detected, the main control chip will immediately stop the operation of the fan motor, thus taking immediate measures before or at the initial stage of foreign object entry to prevent greater safety hazards such as flying debris or motor overheating caused by the foreign object in the high-speed rotating fan blade. Secondly, timely shutdown of the motor prevents foreign objects from jamming the fan blades or motor, reducing mechanical damage and extending the lifespan of the circulating fan. Thirdly, real-time monitoring and timely handling can prevent sudden shutdowns caused by foreign objects, improving equipment stability and reliability and enhancing the user experience. Finally, foreign objects entering the fan blades may cause abnormal noise during operation; real-time detection and handling can prevent this, maintaining smooth and quiet operation. In summary, the solution in this embodiment prevents damage to the motor or surrounding people or objects caused by foreign objects entering the circulating fan, improving the safety and stability of the circulating fan, extending its lifespan, and avoiding noise caused by foreign objects, thus improving the user experience.

[0054] Since gear shifting also causes changes in the induced current generated in the induction coil, in order to accurately distinguish whether the change in induced current is caused by the entry of a foreign object or by gear shifting, the main control chip 6 is used to: determine whether gear shifting has occurred when a change in the induced current generated in the induction coil 3 is detected; if no gear shifting has occurred, it is determined that a foreign object has entered the circulation fan; if gear shifting has occurred, it is determined whether the change in current is greater than the change in current caused by gear shifting; if yes, it is determined that a foreign object has entered the circulation fan; if no, it is determined that no foreign object has entered the circulation fan; wherein, the current change from any gear to any other gear is pre-stored.

[0055] If the real-time output current fluctuates abnormally (i.e., exceeds the normally set threshold) without receiving a gear change signal from the controller, the main control chip will immediately send a signal to stop the operation of the circulating fan motor. If a foreign object flies in during gear switching, since the circulating fan records the change in induced current when switching between different gears before it starts working, and this change should be linear, if a sudden change in current is detected during gear switching, indicating a foreign object problem, the main control chip will send a signal to shut down the circulating fan motor.

[0056] Because an emergency shutdown of the motor can cause foreign objects to fly out, potentially injuring anyone who approaches, the aforementioned foreign object detection device also includes an alarm device 8, connected to the main control chip 6, which issues an alarm when a foreign object is detected entering the circulation fan. When a foreign object enters, in addition to shutting down the motor, the alarm device on the main control chip (e.g., a buzzer) will sound an alarm to warn personnel not to approach the circulation fan containing the foreign object, thus preventing injury from the object being thrown out by inertia. This measure effectively prevents foreign objects from entering or causing secondary injuries from already inside the fan.

[0057] Example 2

[0058] This embodiment provides a circulating fan, including the aforementioned foreign object detection device, to prevent foreign objects from entering the circulating fan and causing damage to the motor itself or to surrounding people or objects, thereby improving the safety of the circulating fan.

[0059] Example 3

[0060] This embodiment provides a control method applied to the aforementioned foreign object detection device. Figure 2 A flowchart of a control method according to an embodiment of the present invention is shown below. Figure 2 As shown, the above control method includes:

[0061] S1, obtain the induced current generated in the induction coil.

[0062] An induction coil is set at the edge of the circulating fan cover, and a strong magnetic sheet is set on the circulating fan blade. When the fan blade rotates, the strong magnetic sheet 1 will generate a changing magnetic field around it, thereby generating a corresponding induced current in the induction coil.

[0063] S2 determines whether foreign objects have entered the circulation fan based on the induced current generated in the induction coil collected by the micro-current sensor.

[0064] When a foreign object enters the circulating fan, the magnetic field is altered, causing a significant change in the induced current of the induction coil compared to normal conditions. Therefore, by monitoring this change in induced current, it can be determined whether a foreign object has entered the circulating fan.

[0065] S3, after confirming that a foreign object has entered the circulation fan, controls the motor in the circulation fan to stop.

[0066] Once a foreign object is detected entering the circulating fan, the main control chip will immediately stop the fan motor. This allows for immediate action before or at the initial stage of the foreign object's entry, preventing it from causing greater safety hazards, such as flying debris or motor overheating, within the high-speed rotating blades.

[0067] Figure 3 This is a flowchart illustrating the process of determining whether a foreign object has entered the circulation step fan according to an embodiment of the present invention. Since gear switching also causes a change in the induced current generated in the induction coil, in order to accurately distinguish whether the change in induced current is caused by the entry of a foreign object or by gear switching, such as... Figure 3 As shown, the presence of foreign objects in the circulation fan is determined based on the induced current generated in the induction coil by the micro-current sensor. Specifically, this includes:

[0068] S21, determine whether the induced current generated in the induction coil has changed; if yes, proceed to step S22; if no, repeat step S21.

[0069] S22, determine whether a gear shift has occurred; if not, proceed to step S23; if yes, proceed to step S24.

[0070] S23, It has been confirmed that a foreign object has entered the circulation fan.

[0071] S24, determine whether the change in current is greater than the change in current caused by gear switching; if yes, proceed to step S25; if no, proceed to step S26. The current changes from switching from any gear to any other gear are pre-stored.

[0072] S25, It has been confirmed that a foreign object has entered the circulation fan;

[0073] S26, confirm that no foreign objects have entered the circulation fan.

[0074] When switching gears, the change in induced current is linear, i.e., it gradually increases or decreases. However, when a foreign object enters, the induced current changes abruptly. Therefore, the presence of a foreign object can be determined based on the instantaneous rate of change of the induced current. Thus, determining whether a foreign object has entered the circulating fan based on the induced current generated in the induction coil collected by the micro-current sensor also includes: calculating the instantaneous rate of change of the induced current; and determining whether a foreign object has entered the circulating fan based on the instantaneous rate of change of the induced current. Specifically, determining whether a foreign object has entered the circulating fan based on the instantaneous rate of change of the induced current includes: determining whether the instantaneous rate of change of the induced current is greater than a preset threshold, wherein the preset threshold can be obtained in advance through experimental testing and then stored in the main control chip; if yes, it is determined that a foreign object has entered the circulating fan; if no, it is determined that no foreign object has entered the circulating fan.

[0075] Example 3

[0076] This embodiment provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the control method of the above embodiment.

[0077] Example 4

[0078] This embodiment provides an electronic device, including:

[0079] One or more processors;

[0080] A storage device for storing one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the control method of the above embodiments.

[0081] Figure 4 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention, such as... Figure 4 As shown, the electronic device includes:

[0082] One or more processors 410 and memory 420, Figure 4 Take a processor 410 as an example.

[0083] The aforementioned electronic device may further include: an input device 430 and an output device 440.

[0084] The processor 410, memory 420, input device 430, and output device 440 can be connected via a bus or other means. Figure 4 Taking the example of a connection between China and Israel via a bus.

[0085] The memory 420, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the control method in this embodiment of the invention. The processor 410 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions, and modules stored in the memory 420, thereby implementing the above-described method embodiments.

[0086] The memory 420 may include a program storage area and a data storage area, wherein the program storage area may store application programs required for operating the device and at least one function; and the data storage area may store data created according to the use of the control method, etc. Furthermore, the memory 420 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 non-volatile solid-state storage device.

[0087] Input device 430 can receive input digital or character information, and generate key signal inputs related to user settings and function control of the electronic device. Output device 440 may include display devices such as a display screen.

[0088] The one or more modules are stored in the memory 420, and when executed by the one or more processors 410, they execute the control method in any of the above method embodiments.

[0089] The aforementioned electronic device can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0090] The electronic devices of this invention exist in various forms, including but not limited to:

[0091] (1) Mobile communication devices: These devices are characterized by their mobile communication capabilities and primarily aim to provide voice and data communication. These terminals include: smartphones (e.g., iPhones), multimedia phones, feature phones, and low-end phones, etc.

[0092] (2) Ultra-mobile personal computer devices: These devices fall under the category of personal computers, possessing computing and processing capabilities, and generally also have mobile internet access features. These terminals include PDAs, MIDs, and UMPCs, such as the iPad.

[0093] (3) Portable entertainment devices: These devices can display and play multimedia content. This category includes: audio and video players (such as iPods), handheld game consoles, e-books, as well as smart toys and portable car navigation devices.

[0094] (4) Server: A device that provides computing services. The components of a server include a processor, hard disk, memory, device bus, etc. Servers are similar to general computer architectures, but because they need to provide highly reliable services, they have higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0095] (5) Other electronic devices with data interaction functions, such as televisions and in-vehicle screens.

[0096] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foreign object detection device, applied to a circulating fan, characterized in that, The device includes: A strong magnetic sheet is fixedly mounted on the blades of the circulating fan; An induction coil is disposed on the edge of the fan face shield of the circulating fan; A microcurrent sensor, connected to the induction coil, is used to collect the induced current generated in the induction coil; The main control chip is connected to the micro-current sensor and is used to determine whether a foreign object has entered the circulation fan based on the induced current generated in the induction coil collected by the micro-current sensor. When it is determined that a foreign object has entered the circulation fan, the main control chip controls the motor of the circulation fan to stop. The main control chip is used to: determine whether a gear shift has occurred when a change in the induced current generated in the induction coil is detected; if no gear shift has occurred, it is determined that a foreign object has entered the circulation fan; if a gear shift has occurred, it is determined whether the change in current is greater than the change in current caused by the gear shift; if yes, it is determined that a foreign object has entered the circulation fan; if no, it is determined that no foreign object has entered the circulation fan; wherein, the current change from any gear to any other gear is pre-stored.

2. The apparatus according to claim 1, characterized in that, The device further includes: An alarm device, connected to the main control chip, is used to issue an alarm when it is determined that a foreign object has entered the circulation fan.

3. A circulating fan, characterized in that, Includes the foreign object detection device as described in claim 1 or 2.

4. A control method applied to the foreign object detection device according to claim 1 or 2, characterized in that, The control methods include: Obtain the induced current generated in the induction coil; The system determines whether a foreign object has entered the circulation fan based on the induced current generated in the induction coil collected by the micro-current sensor. This includes: when a change in the induced current generated in the induction coil is detected, determining whether a gear shift has occurred; if no gear shift has occurred, determining whether a foreign object has entered the circulation fan; if a gear shift has occurred, determining whether the change in current is greater than the change in current caused by the gear shift; if yes, determining whether a foreign object has entered the circulation fan; if no, determining whether no foreign object has entered the circulation fan; wherein, the current change values ​​for switching from any gear to any other gear are pre-stored. Once it is confirmed that a foreign object has entered the circulation fan, the motor in the circulation fan is stopped.

5. The control method according to claim 4, characterized in that, The method for determining whether a foreign object has entered the circulation fan based on the induced current generated in the induction coil collected by the microcurrent sensor also includes: Calculate the instantaneous conversion rate of the induced current; The instantaneous change rate is used to determine whether foreign objects have entered the circulation fan.

6. The control method according to claim 5, characterized in that, Determining whether foreign objects have entered the circulating fan based on the instantaneous change rate includes: Determine whether the instantaneous change rate is greater than a preset threshold; If so, it confirms that a foreign object has entered the circulation fan; If not, then it is confirmed that no foreign objects have entered the circulation fan.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 4 to 6.

8. An electronic device, characterized in that, include: One or more processors; A storage device for storing one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the method as described in any one of claims 4 to 6.

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