Foreign matter detection device, control method and circulating fan

Abstract

The invention discloses a foreign matter detection device, a control method and a circulating fan. The device comprises a strong magnetic sheet which is fixedly arranged on a blade of the circulating fan; the induction coil is arranged on the edge of a fan face cover of the circulating fan; the micro-current sensor is connected with the induction coil and is used for collecting induction current generated in the induction coil; and the main control chip is connected with the micro-current sensor and is used for determining whether a foreign matter enters the circulating fan or not according to the induction current generated in the induction coil and collected by the micro-current sensor, and controlling a motor of the circulating fan to stop rotating when determining that the foreign matter enters the circulating fan. By means of the circulating fan, the problem that when foreign matter enters the circulating fan, the motor is damaged or surrounding people or objects are injured can be solved, the safety and stability of the circulating fan can be improved, the service life of the circulating fan can be prolonged, noise caused by the foreign matter can be avoided, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a foreign matter detection device, a control method and a circulation fan. Background Art

[0002] A circulation fan is a home appliance designed to optimize indoor air flow. Compared with traditional electric fans, circulation fans usually have stronger and more concentrated wind power and can evenly distribute air throughout the room, thereby improving the circulation efficiency of indoor air, helping to quickly cool down or heat up, and improving indoor air quality. Circulation fans are mostly designed with low noise, suitable for long-term use, and suitable for a variety of scenarios such as homes and offices.

[0003] Although the existing circulation fans have a mesh cover structure, due to the large mesh holes, there is still a risk of foreign objects such as children's fingers or flying objects entering the circulation fan. If a living object enters the circulation fan, it will be accidentally injured by the circulation fan; if an inanimate flying object enters the circulation fan, it may cause damage to the circulation fan's motor, fan blades, etc., causing fire or electric shock hazards. If the foreign object is ejected at an accelerated rate in the circulation fan mesh cover, it may also pose a threat to the external environment or personnel.

[0004] With regard to the problem in the prior art that when the blades of a circulating fan rotate, if foreign matter enters the circulating fan, it may cause damage to the motor itself or damage to people or objects around it, no effective solution has been proposed so far. Summary of the invention

[0005] The embodiments of the present invention provide a foreign object detection device, a control method and a circulating fan to solve the problem in the prior art that when the blades of the circulating fan rotate, if a foreign object enters the circulating fan, it may cause damage to the motor itself or damage to people or objects around it.

[0006] In order to solve the above technical problems, the present invention provides a foreign matter detection device, which is applied to a circulating fan, and the device comprises:

[0007] A strong magnetic sheet is fixedly arranged on the blades of the circulation fan;

[0008] An induction coil is arranged at the edge of the fan cover of the circulation fan;

[0009] A micro-current sensor, connected to the induction coil, for collecting 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 according to 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 motor of the circulation fan is controlled 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, determining whether a gear shift has occurred;

[0013] When a change in the induced current generated in the induction coil is detected, determining whether a gear shift occurs;

[0014] If the gear shift does not occur, it is determined that a foreign object has entered the circulation fan;

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

[0016] Furthermore, the device also includes:

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

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

[0019] The present invention also provides a control method, which is applied to the above-mentioned foreign body detection device, and the control method comprises:

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

[0021] Determine whether a foreign object has entered the circulation fan according to the induced current generated in the induction coil collected by the micro-current sensor;

[0022] After determining that foreign matter has entered the circulation fan, the motor in the circulation fan is controlled to stop.

[0023] Further, determining whether a foreign object has entered the circulation fan according to 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, determining whether a gear shift has occurred;

[0025] If the gear shift does not occur, it is determined that a foreign object has entered the circulation fan;

[0026] If a gear switch occurs, determine whether the change in current is greater than the change in current caused by the gear switch; if so, determine that a foreign object has entered the circulation fan; if not, determine that no foreign object has entered the circulation fan; wherein the change in current when switching from any gear to any other gear is pre-stored.

[0027] Further, determining whether a foreign object has entered the circulation fan according to the induced current generated in the induction coil collected by the micro-current sensor, further includes:

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

[0029] Whether a foreign object enters the circulation fan is determined based on the instantaneous conversion rate.

[0030] Further, determining whether a foreign object has entered the circulation fan according to the instantaneous conversion rate includes:

[0031] Determining whether the instantaneous conversion rate is greater than a preset threshold;

[0032] If yes, it is determined that foreign matter has entered the circulation fan;

[0033] If no, determine that no foreign matter has entered the circulation fan.

[0034] The present invention also provides a computer-readable storage medium on which a computer program is stored, and the program implements the above control method when executed by a processor.

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

[0036] one or more processors;

[0037] The storage device is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned control method.

[0038] The technical solution of the present invention is applied, a strong magnetic sheet is arranged on the fan blade of the circulating fan, and an induction coil is arranged on the edge of the fan cover of the circulating fan. The strong magnetic sheet will generate a changing magnetic field when the fan blade rotates, so that a corresponding induced current is generated in the induction coil. The induction coil is connected to a micro-current sensor, and the micro-current sensor detects and records the changes in the induced current generated in the induction coil. Since the magnetic field will be changed when a foreign object enters the circulating fan, the induced current of the induction coil will change greatly compared with the normal situation. Therefore, by monitoring the changes in the induced current, it can be determined whether a foreign object has entered the circulating fan, so that the motor can be controlled to stop in time when a foreign object enters. By real-time monitoring of the changes in the induced current, the risk of foreign objects entering can be detected in time. Once abnormal current fluctuations are detected, the main control chip will immediately stop the operation of the motor of the circulating fan, so that measures can be taken immediately before or at the initial stage of the foreign object entering, so as to avoid the foreign object causing greater safety hazards in the high-speed rotating fan blades, such as flying debris, motor overheating, etc. Stopping the motor in time can prevent foreign objects from getting stuck in the fan blades or motors, reduce mechanical damage, and extend the service life of the circulating fan. Through real-time monitoring and timely processing, sudden shutdowns caused by foreign objects can also be avoided, the stability and reliability of the equipment can be improved, and the user experience can be enhanced. Foreign objects entering the fan blades may cause abnormal noise when the equipment is running. Real-time detection and processing can avoid this situation and keep the equipment running smoothly and quietly. In summary, the solution of this embodiment can avoid the problem of foreign objects entering the circulation fan causing damage to the motor itself or damage to surrounding people or objects, which can improve the safety and stability of the circulation fan, extend the service life of the circulation fan, and avoid noise caused by foreign objects, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0040] Figure 2 is a flow chart of a control method according to an embodiment of the present invention;

[0041] Figure 3 A flowchart of determining whether a foreign object has entered a circulation step fan according to an embodiment of the present invention;

[0042] Figure 4 FIG. 4 is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0045] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0047] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0048] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0049] Example 1

[0050] Although the existing circulation fans have a mesh cover structure, due to the large mesh holes, there is still a risk of foreign objects such as children's fingers or flying objects entering the circulation fan. If a living object enters the circulation fan, it will be accidentally injured by the circulation fan; if an inanimate flying object enters the circulation fan, it may cause damage to the circulation fan's motor, fan blades, etc., causing fire or electric shock hazards. If the foreign object is ejected at an accelerated rate in the circulation fan mesh cover, it may also pose a threat to the external environment or personnel.

[0051] In view of the problem in the prior art that when the blades of a circulating fan rotate, if a foreign object enters the circulating fan, it may cause damage to the motor itself or damage to people or objects around it. This embodiment provides a foreign object detection device, which is applied to the circulating fan. Figure 1 is a structural diagram of a foreign body detection device according to an embodiment of the present invention, as shown in Figure 1 As shown, the device includes: a strong magnetic sheet 1, fixedly arranged on the blade 2 of the circulation fan; an induction coil 3, arranged at the edge of the fan cover 4 of the circulation fan; a microcurrent sensor 5, connected to the induction coil 3, for collecting the induced current generated in the induction coil 3; a main control chip 6, connected to the microcurrent sensor 5, for determining whether a foreign object has entered the circulation fan according to the induced current generated in the induction coil 3 collected by the microcurrent sensor 5, and when it is determined that a foreign object has entered the circulation fan, controlling the motor 7 of the circulation fan to stop.

[0052] The working principle of this embodiment is as follows: an induction coil 3 is arranged at the edge of the circulation fan cover, and a strong magnetic sheet 1 is arranged on the circulation fan blade. When the blade rotates, the above-mentioned strong magnetic sheet 1 will generate a changing magnetic field, thereby generating a corresponding induced current in the induction coil. The induction coil is connected to a micro-current sensor, and the micro-current sensor 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 circulation fan under different working conditions can be monitored in real time. First, the output current size of the circulation fan when it is working stably and normally in each gear is recorded. These reference current data will be used as reference values ​​for subsequent detection. After the circulation fan is running stably, the micro-current sensor will continue to output real-time current data, compare it with the set reference current, record the changes, and judge whether there is foreign matter entering the circulation fan by the current changes.

[0053] The foreign body detection device of this embodiment is provided with a strong magnetic sheet 1 on the circulating fan blade 2, and an induction coil 3 is provided on the edge of the fan cover 4 of the circulating fan. The strong magnetic sheet 1 will generate a changing magnetic field when the fan blade rotates, so that a corresponding induced current is generated in the induction coil 3. The induction coil 3 is connected to a micro-current sensor 5, and the micro-current sensor 5 detects and records the changes in the induced current generated in the induction coil. Since the magnetic field will be changed when a foreign body enters the circulating fan, the induced current of the induction coil will change greatly compared with the normal situation. Therefore, by monitoring the changes in the induced current, it can be determined whether a foreign body enters the circulating fan, so that the motor can be controlled to stop in time when a foreign body enters. Through the above scheme, the following effects can be achieved: first, by real-time monitoring of the changes in the induced current, the risk of foreign body entering can be detected in time. Once an abnormal current fluctuation is detected, the main control chip will immediately stop the operation of the motor of the circulating fan, so that measures can be taken immediately before or at the initial stage of the foreign body entering, so as to avoid the foreign body causing greater safety hazards in the high-speed rotating fan blades, such as flying debris and motor overheating. Secondly, stopping the motor in time can prevent foreign objects from getting stuck in the fan blades or the motor, reduce mechanical damage, and extend the service life of the circulation fan. Thirdly, through real-time monitoring and timely processing, sudden shutdowns caused by foreign objects can be avoided, the stability and reliability of the equipment can be improved, and the user experience can be enhanced. Finally, foreign objects entering the fan blades may cause abnormal noise when the equipment is running. Real-time detection and processing can avoid this situation and keep the equipment running smoothly and quietly. In summary, the solution of this embodiment avoids the problem of foreign objects entering the circulation fan, causing damage to the motor itself or damage to surrounding people or objects, can improve the safety and stability of the circulation fan, extend the service life of the circulation fan, and can also avoid noise caused by foreign objects, thereby improving user experience.

[0054] Since the gear switching will also cause the induced current generated in the induction coil to change, in order to accurately distinguish whether the change in the induced current is caused by the entry of foreign matter or by the gear switching, the main control chip 6 is used to: when it is detected that the induced current generated in the induction coil 3 has changed, determine whether the gear switching has occurred; if the gear switching has not occurred, determine that a foreign matter has entered the circulation fan; if the gear switching has occurred, determine whether the change in current is greater than the change in current caused by the gear switching; if so, determine that a foreign matter has entered the circulation fan; if not, determine that no foreign matter 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 signal from the controller to change gears, the main control chip will immediately send a signal to stop the circulation fan's motor. If a foreign object flies in when switching gears, the change in the induced current when switching between different gears is recorded before the circulation fan starts working, and the change in this value should be linear. If a sudden change in the current is detected when the gear is switched, that is, there is a problem of foreign objects flying in, the main control chip will send a signal to shut down the circulation fan's motor.

[0056] Since emergency shutdown of the motor will cause foreign objects to fly out, if someone approaches at this time, it may cause injury. Therefore, in order to prevent people from approaching, the foreign object detection device also includes: an alarm device 8, connected to the main control chip 6, which is used to sound an alarm when it is determined that a foreign object has entered the circulation fan. When a foreign object enters, in addition to shutting down the motor, the alarm device (such as a buzzer) on the main control chip will sound an alarm to warn people not to approach the circulation fan where foreign objects exist, so as to avoid people being injured by foreign objects thrown out by inertia. This measure can effectively prevent foreign objects from entering or causing secondary injuries to foreign objects that have already entered.

[0057] Example 2

[0058] This embodiment provides a circulation fan, including the above-mentioned foreign object detection device, which is used to prevent foreign objects from entering the circulation fan and causing damage to the motor itself or damage to surrounding people or objects, thereby improving the safety of the circulation fan.

[0059] Example 3

[0060] This embodiment provides a control method, which is applied to the above-mentioned foreign body detection device. Figure 2 is a flow chart of a control method according to an embodiment of the present invention, as shown in Figure 2 As shown, the above control method includes:

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

[0062] An induction coil is arranged at the edge of the circulating fan cover, and a strong magnetic sheet is arranged on the circulating fan blade. When the 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, determining whether a foreign object has entered the circulation fan according to the induced current generated in the induction coil collected by the micro-current sensor.

[0064] When foreign matter enters the circulation fan, the magnetic field will be changed, and the induced current of the induction coil will change significantly compared to normal conditions. Therefore, by monitoring the change of the induced current, it can be determined whether there is foreign matter entering the circulation fan.

[0065] S3, after determining that a foreign object has entered the circulation fan, the motor in the circulation fan is controlled to stop rotating.

[0066] After determining that a foreign object has entered the circulation fan, the main control chip will immediately stop the operation of the circulation fan's motor, thereby taking immediate measures before or at the initial stage of foreign object entry to prevent the foreign object from causing greater safety hazards in the high-speed rotating fan blades, such as flying fragments and motor overheating.

[0067] Figure 3 Flow chart of the step of determining whether a foreign object has entered a cycle according to an embodiment of the present invention. Since the gear switching will also cause the induced current generated in the induction coil to change, in order to accurately distinguish whether the induced current change is caused by the entry of a foreign object or the gear switching, as shown in FIG. Figure 3 As shown, whether a foreign object has entered the circulation fan is determined based on the induced current generated in the induction coil collected by the micro-current sensor, specifically including:

[0068] S21, determining whether the induced current generated in the induction coil changes; if yes, executing step S22; if no, repeating step S21.

[0069] S22, determine whether a gear shift occurs; if not, execute step S23; if yes, execute step S24.

[0070] S23, determining that a foreign object has entered the circulation fan.

[0071] S24, judging whether the current variation is greater than the current variation caused by the gear switching; if yes, executing step S25; if no, executing step S26. The current variation when switching from any gear to any other gear is pre-stored.

[0072] S25, determining that a foreign object has entered the circulation fan;

[0073] S26, confirm that no foreign matter has entered the circulation fan.

[0074] When switching gears, the change of the induced current is linear, that is, it gradually increases or decreases. However, when a foreign object enters, the induced current changes suddenly. Based on this, it is possible to determine whether a foreign object has entered based on the instantaneous rate of change of the induced current. Therefore, 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: calculating the instantaneous change rate of the induced current; determining whether a foreign object has entered the circulation fan based on the instantaneous change rate of the induced current. Specifically, determining whether a foreign object has entered the circulation fan based on the instantaneous change rate of the induced current includes: determining whether the instantaneous change rate of the induced current is greater than a preset threshold value, wherein the preset threshold value can be obtained in advance through experimental testing and then stored in the main control chip; 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.

[0075] Example 3

[0076] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the control method of the above embodiment is implemented.

[0077] Example 4

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

[0079] one or more processors;

[0080] The storage device is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the control method of the above embodiment.

[0081] Figure 4 FIG. 1 is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Figure 4 As shown, the electronic device includes:

[0082] One or more processors 410 and memory 420, Figure 4 A processor 410 is taken as an example.

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

[0084] The processor 410, the memory 420, the input device 430 and the output device 440 may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0085] The memory 420 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the control method in the embodiment of the present 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, that is, implementing the above method embodiment.

[0086] The memory 420 may include a program storage area and a data storage area, wherein the program storage area may store an application required for operating the device and at least one function; the data storage area may store data created according to the use of the control method, etc. In addition, the memory 420 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0087] The input device 430 can receive input digital or character information and generate key signal input related to user settings and function control of the electronic device. The output device 440 can include a display device 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, perform the control method in any of the above method embodiments.

[0089] The electronic device can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0090] The electronic device of the embodiment of the present invention exists in various forms, including but not limited to:

[0091] (1) Mobile communication devices: These devices are characterized by their mobile communication functions and their main purpose is to provide voice and data communications. These terminals include: smart phones (such as iPhone), multimedia phones, functional phones, and low-end phones.

[0092] (2) Ultra-mobile personal computer devices: These devices fall into the category of personal computers, have computing and processing capabilities, and generally also have mobile Internet access features. These terminals include: PDA, MID and UMPC devices, such as iPad.

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

[0094] (4) Server: A device that provides computing services. The server consists of a processor, hard disk, memory, device bus, etc. The server is similar to a general computer architecture, but because it needs to provide highly reliable services, it has 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, large-screen cars, etc.

[0096] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foreign body detection device, applied to a circulating fan, characterized in that: The device comprises: A strong magnetic sheet is fixedly arranged on the blades of the circulation fan; An induction coil is arranged at the edge of the fan cover of the circulation fan; A micro-current sensor, connected to the induction coil, for collecting 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 according to 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 motor of the circulation fan is controlled to stop.

2. The device according to claim 1, characterized in that The main control chip is used for: When a change in the induced current generated in the induction coil is detected, determining whether a gear shift occurs; If the gear shift does not occur, it is determined that a foreign object has entered the circulation fan; If a gear switch occurs, determine whether the change in current is greater than the change in current caused by the gear switch; if so, determine that a foreign object has entered the circulation fan; if not, determine that no foreign object has entered the circulation fan; wherein the change in current when switching from any gear to any other gear is pre-stored.

3. The device according to claim 1, characterized in that The device also includes: The alarm device is connected to the main control chip and is used to sound an alarm when it is determined that a foreign object has entered the circulation fan.

4. A circulating fan, characterized in that: A foreign body detection device comprising any one of claims 1 to 3.

5. A control method, applied to the foreign body detection device according to any one of claims 1 to 3, characterized in that: Controlled methods include: obtaining the induced current generated in the induction coil; Determine whether a foreign object has entered the circulation fan according to the induced current generated in the induction coil collected by the micro-current sensor; After determining that foreign matter has entered the circulation fan, the motor in the circulation fan is controlled to stop.

6. The control method according to claim 5, characterized in that: Determining whether a foreign object has entered the circulation fan according to the induced current generated in the induction coil collected by the micro-current sensor includes: When a change in the induced current generated in the induction coil is detected, determining whether a gear shift has occurred; If the gear shift does not occur, it is determined that a foreign object has entered the circulation fan; If a gear switch occurs, determine whether the change in current is greater than the change in current caused by the gear switch; if so, determine that a foreign object has entered the circulation fan; if not, determine that no foreign object has entered the circulation fan; wherein the change in current when switching from any gear to any other gear is pre-stored.

7. The control method according to claim 5, characterized in that: Determining whether a foreign object has entered the circulation fan according to the induced current generated in the induction coil collected by the micro-current sensor, further comprising: Calculating the instantaneous conversion rate of the induced current; Whether a foreign object enters the circulation fan is determined based on the instantaneous conversion rate.

8. The control method according to claim 7, characterized in that: Determining whether a foreign object has entered the circulation fan according to the instantaneous conversion rate includes: Determining whether the instantaneous conversion rate is greater than a preset threshold; If yes, it is determined that foreign matter has entered the circulation fan; If no, determine that no foreign matter has entered the circulation fan.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 5 to 8 is implemented.

10. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to implement the method as claimed in any one of claims 5 to 8.

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