Method for determining the speed of an electric fan, device therefor and electronic device

Abstract

The application provides a method for determining the gear of an electric fan, a device thereof and an electronic device. The method comprises: controlling the electric fan to be in a natural wind mode and collecting the wind speed of the electric fan in a first time period; determining a first power spectral density index according to the wind speed, the first power spectral density index being the power spectral density index of the electric fan in the first time period; in the case that the first power spectral density index is within a predetermined range, not adjusting the gear of the electric fan; in the case that the first power spectral density index is not within the predetermined range, adjusting the gear of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determining the corresponding gear of the electric fan to be a first target gear. The method adjusts the gear of the electric fan to the first target gear in the case that the first power spectral density index is not within the predetermined range, so that the power spectral density index of the electric fan is within the predetermined range, thereby solving the problem of poor comfort experience in the natural wind mode in the prior art.

Description

Technical Field

[0001] This application relates to the field of fan adjustment, and more specifically, to a method for determining the speed of an electric fan, a device for determining the speed of an electric fan, and an electronic device. Background Technology

[0002] The human experience of being blown by an electric fan is a crucial factor in determining the fan's speed setting. In daily use, a fan alters the airflow pattern, speed, volume, and local temperature, affecting the human body. The skin perceives this, and the brain receives feedback such as sensations of coolness or heat. Most electric fans adjust the fan's airflow by increasing air volume or speed, altering a single variable. However, in practice, increasing air volume leads to increased speed and a harsher airflow. Conversely, decreasing speed reduces air volume but softens the airflow. This inability to balance air volume and speed reduces overall comfort. Existing products often use a simple sleep mode control logic, either gradually lowering the speed to the lowest setting and then stabilizing, or exhibiting inconsistent speed fluctuations, resulting in a poor comfort experience and failing to meet people's need for natural breezes. Summary of the Invention

[0003] The main objective of this application is to provide a method for determining the speed of an electric fan, a device for determining the speed of an electric fan, and an electronic device, so as to at least solve the problem of poor comfort experience in the natural wind mode in the prior art.

[0004] To achieve the above objectives, according to one aspect of this application, a method for determining the speed setting of an electric fan is provided, comprising: controlling the electric fan in a natural wind mode and collecting the wind speed of the electric fan during a first time period, wherein the natural wind mode is a mode that simulates the wind speed and direction of natural wind, and the first time period includes the current moment; determining a first power spectral density index based on the wind speed, wherein the first power spectral density index is the power spectral density index of the electric fan during the first time period; not adjusting the speed setting of the electric fan if the first power spectral density index is within a predetermined range; and adjusting the speed setting of the electric fan if the first power spectral density index is not within the predetermined range, such that the power spectral density index of the electric fan is within the predetermined range, and determining the corresponding speed setting of the electric fan as a first target speed setting.

[0005] Optionally, if the first power spectral density index is not within the predetermined range, the fan speed is adjusted so that the power spectral density index of the fan is within the predetermined range, and the corresponding fan speed is determined as the first target speed. This includes: a determination step: determining a preliminary speed, which is one speed lower than the current speed; an operation step: controlling the fan to run at the preliminary speed for a first predetermined time; a calculation step: calculating the power spectral density index of the fan during the first predetermined time; and repeating the determination step, the operation step, and the calculation step at least once until the power spectral density index of the fan is within the predetermined range during the first predetermined time, thus determining the corresponding fan speed as the first target speed.

[0006] Optionally, when the first power spectral density index is not within the predetermined range, the method further includes: adjusting the fan speed so that the power spectral density index of the fan is within the predetermined range, and determining the corresponding fan speed as the first target speed, after which the method further includes: obtaining a first temperature and a second temperature, wherein the first temperature is the average temperature of the environment where the fan is located during the first time period, and the second temperature is the average temperature of the environment where the fan is located during the second time period, and the second time period is the time period before and adjacent to the first time period; calculating the difference between the first temperature and the second temperature to obtain a temperature difference value; controlling the fan to operate at the first target speed when the temperature difference value is within the predetermined temperature range; and determining a second target speed and adjusting the fan speed to the second target speed when the temperature difference value is not within the predetermined temperature range.

[0007] Optionally, determining a second target speed when the temperature difference is not within a predetermined temperature range includes: when the temperature difference is greater than the maximum value of the predetermined temperature range, operating the fan at a speed one level higher than the first target speed for a second time, and calculating a second power spectral density index, where the second power spectral density index is the power spectral density index of the electric fan during the second time; when the second power spectral density index is within a predetermined range, not adjusting the speed of the electric fan; when the second power spectral density index is not within the predetermined range, adjusting the speed of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determining the corresponding... The fan speed is set to the second target speed. If the temperature difference is less than the minimum value of the predetermined temperature range, the fan is run at a speed one level lower than the first target speed for a third time, and a third power spectral density index is calculated. The third power spectral density index is the power spectral density index of the fan during the third time. If the third power spectral density index is within the predetermined range, the fan speed is not adjusted. If the third power spectral density index is not within the predetermined range, the fan speed is adjusted so that the power spectral density index of the fan is within the predetermined range, and the corresponding fan speed is determined as the second target speed.

[0008] Optionally, before controlling the electric fan to be in natural wind mode, the method includes: obtaining the initial gear position of the electric fan and determining the gear intensity of the initial gear position, the gear intensity being used to characterize the size of the electric fan gear position; determining the operating mode of the electric fan based at least on whether the gear intensity is within a predetermined gear range.

[0009] Optionally, the operating mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined gear range, including: when the intensity of the gear is lower than the predetermined gear range and not equal to the lowest gear, controlling the electric fan to run sequentially at the initial gear for a fourth time, at the first gear for a fifth time, and at the second gear for a sixth time, wherein the first gear is the initial gear down by one gear, and the second gear is the first gear down by one gear; when the intensity of the gear is higher than the predetermined gear range and not equal to the highest gear, controlling the electric fan to run sequentially at the intermediate gear for a seventh time, at the third gear for an eighth time, at the fourth gear for a ninth time, and at the fifth gear for a tenth time, wherein the intermediate gear is the gear whose intensity is within the predetermined gear range, the third gear is the intermediate gear down by one gear, the fourth gear is the third gear down by one gear, and the fifth gear is the fourth gear down by one gear.

[0010] Optionally, the operating mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range but equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for an eleventh time, at the sixth gear for a twelfth time, and at the seventh gear for a thirteenth time, wherein the sixth gear is the gear between the lowest gear and the intermediate gear, and the seventh gear is the sixth gear down one gear; when the intensity of the gear is higher than the predetermined range but equal to the highest gear, controlling the electric fan to operate sequentially at the eighth gear for a fourteenth time, at the ninth gear for a fifteenth time, at the tenth gear for a sixteenth time, and at the eleventh gear for a seventeenth time, wherein the eighth gear is the gear between the highest gear and the intermediate gear, the ninth gear is the eighth gear down one gear, the tenth gear is the ninth gear down one gear, and the eleventh gear is the tenth gear down one gear.

[0011] Optionally, determining the first power spectral density index based on the wind speed includes: obtaining a first curve based on the wind speed and corresponding time, wherein the first curve is a relationship curve between the wind speed and the time within the first time period; performing smoothing and fast Fourier transform processing on the first curve sequentially to obtain a second curve, wherein the second curve is a relationship curve between the frequency of the wind speed and the power spectral density, and the second curve satisfies... Where v′ is the wind speed, f is the frequency, and E(f) is the power spectral density; according to E(f) = a + bf -β The spectral characteristics of the wind speed are analyzed in the form of [missing information], and the second curve is fitted by the least squares method to obtain the power spectral density curve, where a and b are constants and β is the power spectral density exponent; the negative slope of the power spectral density curve is calculated to obtain the first power spectral density exponent.

[0012] According to another aspect of this application, a device for determining the speed of an electric fan is provided, comprising a first control unit, a first determining unit, a first processing unit, and a second processing unit. The first control unit is configured to control the electric fan in a natural wind mode and collect the fan's wind speed within a first time period. The natural wind mode is a mode that simulates the wind speed and direction of natural wind. The first time period includes the current moment. The first determining unit is configured to determine a first power spectral density index based on the wind speed. The first power spectral density index is the power spectral density index of the electric fan within the first time period. The first processing unit is configured not to adjust the fan speed if the first power spectral density index is within a predetermined range. The second processing unit is configured to adjust the fan speed if the first power spectral density index is not within the predetermined range, such that the fan's power spectral density index is within the predetermined range, and determine the corresponding fan speed as a first target speed.

[0013] According to another aspect of this application, an electronic device is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including a method for performing any of the methods for determining the speed of an electric fan.

[0014] According to the technical solution of this application, the method for determining the speed of an electric fan includes: controlling the electric fan to be in natural wind mode and collecting the wind speed of the electric fan within a first time period, wherein the natural wind mode is a mode that simulates the wind speed and direction of natural wind, and the first time period includes the current moment; determining a first power spectral density index based on the wind speed, wherein the first power spectral density index is the power spectral density index of the electric fan within the first time period; not adjusting the speed of the electric fan if the first power spectral density index is within a predetermined range; and adjusting the speed of the electric fan if the first power spectral density index is not within the predetermined range, so that the power spectral density index of the electric fan is within the predetermined range, and determining the corresponding speed of the electric fan as a first target speed. This method calculates the first power spectral density index of the wind speed during the first time period in natural wind mode. It determines whether to adjust the fan speed based on whether the first power spectral density index is within a predetermined range. If the first power spectral density index is not within the predetermined range, the fan speed is adjusted to the first target speed so that the power spectral density index of the fan is within the predetermined range. This allows for the selection of a suitable speed as the control speed when natural wind mode is activated, improving the user's comfort experience during use and thus solving the problem of poor comfort experience in natural wind mode in the prior art. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 A hardware structure block diagram of a mobile terminal for performing a method for determining the speed of an electric fan, according to an embodiment of this application, is shown.

[0017] Figure 2 A flowchart illustrating a method for determining the speed setting of an electric fan according to an embodiment of this application is shown.

[0018] Figure 3 A structural block diagram of a fan speed determination device according to an embodiment of this application is shown.

[0019] The above figures include the following reference numerals:

[0020] 102. Processor; 104. Memory; 106. Transmission device; 108. Input / output device. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] As described in the background section, the comfort experience in the natural wind mode of the prior art is poor. In order to solve the above problems, the embodiments of this application provide a method for determining the speed of an electric fan, a device for determining the speed of an electric fan, and an electronic device.

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] The methods and embodiments provided in this application can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a method of determining the speed setting of an electric fan according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0027] This embodiment provides a method for determining the speed setting of an electric fan that runs on a mobile terminal, computer terminal, or similar computing device. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0028] Figure 2 This is a flowchart of a method for determining the speed setting of an electric fan according to an embodiment of this application. Figure 2 As shown, the method includes the following steps:

[0029] Step S201: Control the electric fan to be in natural wind mode and collect the wind speed of the electric fan during the first time period. The natural wind mode is a mode that simulates the wind speed and direction of natural wind. The first time period includes the current moment.

[0030] Specifically, traditional electric fans produce a harsh, uncomfortable breeze, while the gentle breeze from nature feels comfortable. Therefore, setting an electric fan to natural wind mode makes people feel more comfortable. Sensors can monitor changes in the fan's wind speed. The first time period mentioned above can include a 30-minute duration, encompassing the current moment. In other words, by collecting wind speed data over a recent period, subsequent adjustments to the fan's speed based on this data can be made more accurate.

[0031] Step S202: Based on the wind speed, determine the first power spectral density index, which is the power spectral density index of the electric fan during the first time period.

[0032] Specifically, the power spectral density index of a wind speed curve is a parameter that describes the frequency distribution characteristics of wind speed over time. It can reflect the energy distribution of the wind speed curve at different frequencies.

[0033] To accurately calculate the aforementioned first power spectral density index, one optional approach involves determining the first power spectral density index based on the aforementioned wind speed, including: obtaining a first curve based on the aforementioned wind speed and corresponding time, wherein the first curve is a relationship curve between the aforementioned wind speed and the aforementioned time within the aforementioned first time period; and sequentially performing smoothing and fast Fourier transform processing on the aforementioned first curve to obtain a second curve, wherein the second curve is a relationship curve between the frequency of the aforementioned wind speed and the power spectral density, wherein the second curve satisfies... Among them, v ′ Let f be the wind speed, f be the frequency, and E(f) be the power spectral density; according to E(f) = a + bf -β The spectral characteristics of the wind speed are analyzed in the form of [formula missing], and the second curve is fitted by the least squares method to obtain the power spectral density curve, where a and b are constants and β is the power spectral density exponent; the negative slope of the power spectral density curve is calculated to obtain the first power spectral density exponent.

[0034] In practical applications, if a frequency f is an analog signal with finite energy, then its Fourier transform represents the spectrum of f. The magnitude of the power spectral density function corresponding to different frequencies f reflects the strength of the signal over a certain period of time.

[0035] Step S203: If the first power spectral density index is within a predetermined range, do not adjust the speed of the electric fan.

[0036] Specifically, when the first power spectral density index is within a predetermined range, it indicates that the fan speed is comfortable, and the fan speed should not be adjusted.

[0037] Step S204: If the first power spectral density index is not within the predetermined range, adjust the speed of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determine the corresponding speed of the electric fan as the first target speed.

[0038] Specifically, the β value range for natural wind is 1.1 < β < 2, and the β value range for mechanical wind is β < 1.1. The closer the wind spectrum characteristics are to natural wind, the more beneficial it is to human thermal comfort. The aforementioned predetermined range can be (1.1, 2).

[0039] In order to determine a suitable speed setting as the control speed setting in natural wind mode, in one optional solution, when the first power spectral density index is not within the predetermined range, the speed setting of the electric fan is adjusted so that the power spectral density index of the electric fan is within the predetermined range, and the corresponding speed setting of the electric fan is determined as the first target speed setting. This includes: a determination step: determining a preliminary speed setting, wherein the preliminary speed setting is one speed lower than the current speed setting; an operation step: controlling the electric fan to run at the preliminary speed setting for a first predetermined time; a calculation step: calculating the power spectral density index of the electric fan during the first predetermined time; and repeating the determination step, the operation step, and the calculation step at least once in sequence until the power spectral density index of the electric fan is within the predetermined range during the first predetermined time, and determining the corresponding speed setting of the electric fan as the first target speed setting.

[0040] In practical applications, if the β value of the current setting is far from the predetermined range, it indicates that the wind speed variation at that setting differs significantly from natural wind. To ensure comfortable airflow, the setting should be lowered by one level to the predetermined setting, resulting in a gentler breeze. The first predetermined time can be 15 minutes, and then a new first power spectral density index should be tested until the first power spectral density index falls within the predetermined range.

[0041] Specifically, if the fan speed has already been set to the lowest setting during the adjustment process, it should be kept at that setting. This will reduce the feeling of airflow from the fan and improve the comfort of the user experience.

[0042] Following step S204, the method further includes: acquiring a first temperature and a second temperature, wherein the first temperature is the average temperature of the environment where the electric fan is located during the first time period, and the second temperature is the average temperature of the environment where the electric fan is located during the second time period, and the second time period is the time period preceding and adjacent to the first time period; calculating the difference between the first temperature and the second temperature to obtain a temperature difference value; if the temperature difference is within a predetermined temperature range, controlling the electric fan to operate at the first target speed; if the temperature difference is not within the predetermined temperature range, determining a second target speed and adjusting the electric fan speed to the second target speed. Simultaneously monitoring temperature changes during use can further improve comfort.

[0043] To further achieve a comfortable airflow from the electric fan, combining the characteristics of the ambient temperature and wind speed spectrum, another optional solution involves determining a second target speed when the temperature difference is outside the predetermined temperature range. This includes: when the temperature difference exceeds the maximum value of the predetermined temperature range, increasing the speed by one level from the first target speed for a second period of time, and calculating a second power spectral density index. The second power spectral density index is the power spectral density index of the electric fan during the second period. If the second power spectral density index is within the predetermined range, the fan speed is not adjusted; if the second power spectral density index is outside the predetermined range, the fan speed is adjusted to increase the power of the electric fan. If the power spectral density index is within the predetermined range, the corresponding fan speed is determined as the second target speed. If the temperature difference is less than the minimum value of the predetermined temperature range, the fan is run at a speed one level lower than the first target speed for a third time, and a third power spectral density index is calculated. The third power spectral density index is the power spectral density index of the fan during the third time. If the third power spectral density index is within the predetermined range, the fan speed is not adjusted. If the third power spectral density index is not within the predetermined range, the fan speed is adjusted so that the power spectral density index of the fan is within the predetermined range, and the corresponding fan speed is determined as the second target speed.

[0044] In practical applications, adjusting the fan speed when the second power spectral density index is not within the predetermined range, and adjusting the fan speed when the third power spectral density index is not within the predetermined range, are the same steps as adjusting the fan speed when the first power spectral density index is not within the predetermined range. These steps include: Step 1: Determining a preparatory speed as one speed lower than the current speed; Step 2: Controlling the fan to run at the preparatory speed for a period of time; Step 3: Determining the power spectral density index of the fan within a certain period as the new corresponding power spectral density index; Repeating steps 1, 2, and 3 at least once until the corresponding power spectral density index falls within the predetermined range, and then determining the current speed as the target speed.

[0045] In another alternative approach, before controlling the electric fan to be in natural wind mode, the method includes: obtaining the initial speed setting of the electric fan and determining the intensity of the initial speed setting, the intensity of which characterizes the size of the electric fan speed setting; and determining the operating mode of the electric fan based at least on whether the intensity of the speed setting is within a predetermined range. Adjusting the electric fan speed before activating natural wind mode makes the fan's airflow more comfortable.

[0046] To further enhance the comfort of the electric fan, in another optional solution, the operating mode of the electric fan is determined at least based on whether the intensity of the above-mentioned gear is within a predetermined gear range. This includes: when the intensity of the above-mentioned gear is lower than the predetermined gear range and is not equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for a fourth time, at the first gear for a fifth time, and at the second gear for a sixth time, wherein the first gear is one gear lower than the initial gear, and the second gear is one gear lower than the first gear; when the intensity of the above-mentioned gear is higher than the predetermined gear range and is not equal to the highest gear, controlling the electric fan to operate sequentially at the intermediate gear for a seventh time, at the third gear for an eighth time, at the fourth gear for a ninth time, and at the fifth gear for a tenth time, wherein the intermediate gear is the gear whose intensity is within the predetermined gear range, the third gear is one gear lower than the intermediate gear, the fourth gear is one gear lower than the third gear, and the fifth gear is one gear lower than the fourth gear.

[0047] In practical applications, the intensity of an electric fan can be determined based on the number of speed settings available on the fan. For example, if an electric fan has six speed settings, then speeds three and four can be classified as intermediate speeds.

[0048] In another alternative, the operation mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range but equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for an eleventh time, at the sixth gear for a twelfth time, and at the seventh gear for a thirteenth time, where the sixth gear is the gear between the lowest gear and the intermediate gear, and the seventh gear is the sixth gear down one gear; when the intensity of the gear is higher than the predetermined range but equal to the highest gear, controlling the electric fan to operate sequentially at the eighth gear for a fourteenth time, at the ninth gear for a fifteenth time, at the tenth gear for a sixteenth time, and at the eleventh gear for a seventeenth time, where the eighth gear is the gear between the highest gear and the intermediate gear, the ninth gear is the eighth gear down one gear, the tenth gear is the ninth gear down one gear, and the eleventh gear is the tenth gear down one gear. The above-mentioned speed adjustment method can be used before setting the electric fan to natural wind mode to further enhance the comfort of the fan's airflow.

[0049] The above embodiment calculates the first power spectral density index of the wind speed in the first time period under natural wind mode, determines whether to adjust the fan speed based on whether the first power spectral density index is within a predetermined range, and adjusts the fan speed to the first target speed when the first power spectral density index is not within the predetermined range so that the fan power spectral density index is within the predetermined range. This allows for the selection of a suitable speed as the control speed when natural wind mode is activated, improving the user's comfort experience during use and solving the problem of poor comfort experience in natural wind mode in the prior art.

[0050] This application also provides a device for determining the speed of an electric fan. It should be noted that this device can be used to execute the method for determining the speed of an electric fan provided in this application. This device is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0051] The following describes the fan speed determination device provided in the embodiments of this application.

[0052] Figure 3 This is a schematic diagram of a fan speed determination device according to an embodiment of this application. Figure 3As shown, the device includes a first control unit 10, a first determination unit 20, a first processing unit 30, and a second processing unit 40, wherein,

[0053] The first control unit 10 is used to control the electric fan to be in natural wind mode and to collect the wind speed of the electric fan during a first time period. The natural wind mode is a mode that simulates the wind speed and direction of natural wind. The first time period includes the current moment.

[0054] Specifically, traditional electric fans produce a harsh, uncomfortable breeze, while the gentle breeze from nature feels comfortable. Therefore, setting an electric fan to natural wind mode makes people feel more comfortable. Sensors can monitor changes in the fan's wind speed. The first time period mentioned above can include a 30-minute duration, encompassing the current moment. In other words, by collecting wind speed data over a recent period, subsequent adjustments to the fan's speed based on this data can be made more accurate.

[0055] The first determining unit 20 is used to determine a first power spectral density index based on the wind speed, wherein the first power spectral density index is the power spectral density index of the electric fan during the first time period.

[0056] Specifically, the power spectral density index of a wind speed curve is a parameter that describes the frequency distribution characteristics of wind speed over time. It can reflect the energy distribution of the wind speed curve at different frequencies.

[0057] To accurately calculate the first power spectral density index, in one optional scheme, the first determining unit includes a first processing module, a second processing module, a third processing module, and a first calculation module. The first processing module is used to obtain a first curve based on the wind speed and corresponding time, where the first curve is the relationship curve between the wind speed and the time within the first time period. The second processing module is used to sequentially perform smoothing and fast Fourier transform processing on the first curve to obtain a second curve, where the second curve is the relationship curve between the frequency of the wind speed and the power spectral density, and the second curve satisfies... Among them, v ′ The wind speed is given above, f is given above, and E(f) is given above, power spectral density is given above; the third processing module is used to process the power spectral density according to E(f) = a + bf. -β The spectral characteristics of the wind speed are analyzed in the form of [formula missing], and the second curve is fitted by the least squares method to obtain the power spectrum curve, where a and b are constants and β is the power spectral density exponent; the first calculation module is used to calculate the negative slope of the power spectrum curve to obtain the first power spectral density exponent.

[0058] In practical applications, if a frequency f is an analog signal with finite energy, then its Fourier transform represents the spectrum of f. The magnitude of the power spectral density function corresponding to different frequencies f reflects the strength of the signal over a certain period of time.

[0059] The first processing unit 30 is configured not to adjust the speed of the electric fan when the first power spectral density index is within a predetermined range.

[0060] Specifically, when the first power spectral density index is within a predetermined range, it indicates that the fan speed is comfortable, and the fan speed should not be adjusted.

[0061] The second processing unit 40 is used to adjust the speed of the electric fan when the first power spectral density index is not within the predetermined range, so that the power spectral density index of the electric fan is within the predetermined range, and to determine the corresponding speed of the electric fan as the first target speed.

[0062] Specifically, the β value range for natural wind is 1.1 < β < 2, and the β value range for mechanical wind is β < 1.1. The closer the wind spectrum characteristics are to natural wind, the more beneficial it is to human thermal comfort. The aforementioned predetermined range can be (1.1, 2).

[0063] To determine a suitable speed setting for the control mode in natural wind mode, in one optional embodiment, the second processing unit includes a first determining module, an operating module, a second calculating module, and a second determining module. The first determining module is used to determine a preliminary speed setting, which is one speed lower than the current speed setting. The operating module is used to operate the electric fan at the preliminary speed setting for a first predetermined time. The second calculating module is used to calculate the power spectral density index of the electric fan within the first predetermined time period. The second determining module is used to repeat the determining, operating, and calculating steps at least once until the power spectral density index of the electric fan is within the predetermined range within the first predetermined time period, thus determining the corresponding speed setting of the electric fan as the first target speed setting.

[0064] In practical applications, if the β value of the current setting is far from the predetermined range, it indicates that the wind speed variation at that setting differs significantly from natural wind. To ensure comfortable airflow, the setting should be lowered by one level to the predetermined setting, resulting in a gentler breeze. The first predetermined time can be 15 minutes, and then a new first power spectral density index should be tested until the first power spectral density index falls within the predetermined range.

[0065] Specifically, if the fan speed has already been set to the lowest setting during the adjustment process, it should be kept at that setting. This will reduce the feeling of airflow from the fan and improve the comfort of the user experience.

[0066] The aforementioned device further includes a first acquisition unit, a calculation unit, a second control unit, and a second determination unit. The first acquisition unit, after determining a first target speed based at least on whether the first power spectral density index is within a predetermined range, acquires a first temperature and a second temperature. The first temperature is the average temperature of the environment where the electric fan is located during a first time period, and the second temperature is the average temperature of the environment where the electric fan is located during a second time period. The second time period is the time period preceding and adjacent to the first time period. The calculation unit calculates the difference between the first temperature and the second temperature to obtain a temperature difference value. The second control unit controls the electric fan to operate at the first target speed when the temperature difference is within a predetermined temperature range. The second determination unit determines a second target speed and adjusts the electric fan speed to the second target speed when the temperature difference is not within the predetermined temperature range. Simultaneously monitoring temperature changes during use can further improve comfort.

[0067] To further achieve a comfortable airflow from the electric fan, combining the characteristics of ambient temperature and wind speed spectrum, in another optional solution, the second determining unit includes a third determining module and a fourth determining module. The third determining module is used to, when the temperature difference exceeds the maximum value of the predetermined temperature range, increase the fan speed by one level for a second period of time and calculate a second power spectral density index. This second power spectral density index is the power spectral density index of the electric fan during the second period. If the second power spectral density index is within the predetermined range, the fan speed is not adjusted; if the second power spectral density index is outside the predetermined range, the fan speed is adjusted to achieve the desired power spectral density. If the index is within the predetermined range, the corresponding fan speed is determined as the second target speed. The fourth determining module is used to operate the fan at a speed one level lower than the first target speed for a third time when the temperature difference is less than the minimum value of the predetermined temperature range, and to calculate the third power spectral density index, which is the power spectral density index of the fan during the third time. If the third power spectral density index is within the predetermined range, the fan speed is not adjusted. If the third power spectral density index is not within the predetermined range, the fan speed is adjusted so that the power spectral density index of the fan is within the predetermined range, and the corresponding fan speed is determined as the second target speed.

[0068] In practical applications, adjusting the fan speed when the second power spectral density index is not within the predetermined range, and adjusting the fan speed when the third power spectral density index is not within the predetermined range, are the same steps as adjusting the fan speed when the first power spectral density index is not within the predetermined range. These steps include: Step 1: Determining a preparatory speed as one speed lower than the current speed; Step 2: Controlling the fan to run at the preparatory speed for a period of time; Step 3: Determining the power spectral density index of the fan within a certain period as the new corresponding power spectral density index; Repeating steps 1, 2, and 3 at least once until the corresponding power spectral density index falls within the predetermined range, and then determining the current speed as the target speed.

[0069] In another alternative embodiment, the device includes a second acquisition unit and a third determination unit. The second acquisition unit acquires the initial speed setting of the electric fan before controlling it to operate in natural wind mode, and determines the intensity of that initial speed setting, where the intensity characterizes the size of the electric fan's speed. The third determination unit determines the operating mode of the electric fan based at least on whether the intensity is within a predetermined range. Adjusting the fan speed before activating natural wind mode makes the fan's airflow more comfortable.

[0070] To further enhance the comfort of the electric fan, in another optional embodiment, the third determining unit includes a first control module and a second control module. The first control module controls the electric fan to sequentially operate at the initial speed for a fourth time, at the first speed for a fifth time, and at the second speed for a sixth time when the speed intensity is below the predetermined speed range and not equal to the lowest speed. The first speed is one speed lower than the initial speed, and the second speed is one speed lower than the first speed. The second control module controls the electric fan to sequentially operate at the intermediate speed for a seventh time, at the third speed for an eighth time, at the fourth speed for a ninth time, and at the fifth speed for a tenth time when the speed intensity is above the predetermined speed range and not equal to the highest speed. The intermediate speed corresponds to a speed intensity within the predetermined speed range, and the third speed is one speed lower than the intermediate speed, the fourth speed is one speed lower than the third speed, and the fifth speed is one speed lower than the fourth speed.

[0071] In practical applications, the intensity of an electric fan can be determined based on the number of speed settings available on the fan. For example, if an electric fan has six speed settings, then speeds three and four can be classified as intermediate speeds.

[0072] In another optional embodiment, the third determining unit includes a third control module and a fourth control module. The third control module controls the electric fan to sequentially operate at the initial speed for an eleventh time, at the sixth speed for a twelfth time, and at the seventh speed for a thirteenth time when the speed intensity is below the predetermined speed range but equal to the lowest speed. The sixth speed is the speed between the lowest speed and the intermediate speed, and the seventh speed is the sixth speed reduced by one speed. The fourth control module controls the electric fan to sequentially operate at the eighth speed for a fourteenth time, at the ninth speed for a fifteenth time, at the tenth speed for a sixteenth time, and at the eleventh speed for a seventeenth time when the speed intensity is above the predetermined speed range but equal to the highest speed. The eighth speed is the speed between the highest speed and the intermediate speed, and the ninth speed is the eighth speed reduced by one speed, the tenth speed is the ninth speed reduced by one speed, and the eleventh speed is the tenth speed reduced by one speed. The above-mentioned speed adjustment method can be used before setting the electric fan to natural wind mode to further enhance the comfort of the fan's airflow.

[0073] The above embodiment calculates the first power spectral density index of the wind speed in the first time period under natural wind mode, determines whether to adjust the fan speed based on whether the first power spectral density index is within a predetermined range, and adjusts the fan speed to the first target speed when the first power spectral density index is not within the predetermined range so that the fan power spectral density index is within the predetermined range. This allows for the selection of a suitable speed as the control speed when natural wind mode is activated, improving the user's comfort experience during use and solving the problem of poor comfort experience in natural wind mode in the prior art.

[0074] The aforementioned fan speed setting determination device includes a processor and a memory. The first control unit, the first determining unit, the first processing unit, and the second output unit are all stored as program units in the memory. The processor executes these program units stored in the memory to achieve the corresponding functions. All of the above modules reside in the same processor; alternatively, the modules may be located in different processors in any combination.

[0075] The processor contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured, and adjusting kernel parameters can address the issue of poor comfort in natural wind mode in existing technologies.

[0076] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0077] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the method for determining the speed of an electric fan.

[0078] Specifically, the methods for determining the speed setting of an electric fan include:

[0079] Step S201: Control the electric fan to be in natural wind mode and collect the wind speed of the electric fan during the first time period. The natural wind mode is a mode that simulates the wind speed and direction of natural wind. The first time period includes the current moment.

[0080] Specifically, traditional electric fans produce a harsh, uncomfortable breeze, while the gentle breeze from nature feels comfortable. Therefore, setting an electric fan to natural wind mode makes people feel more comfortable. Sensors can monitor changes in the fan's wind speed. The first time period mentioned above can include a 30-minute duration, encompassing the current moment. In other words, by collecting wind speed data over a recent period, subsequent adjustments to the fan's speed based on this data can be made more accurate.

[0081] Step S202: Based on the wind speed, determine the first power spectral density index, which is the power spectral density index of the electric fan during the first time period.

[0082] Specifically, the power spectral density index of a wind speed curve is a parameter that describes the frequency distribution characteristics of wind speed over time. It can reflect the energy distribution of the wind speed curve at different frequencies.

[0083] Step S203: If the first power spectral density index is within a predetermined range, do not adjust the speed of the electric fan.

[0084] Specifically, when the first power spectral density index is within a predetermined range, it indicates that the fan speed is comfortable, and the fan speed should not be adjusted.

[0085] Step S204: If the first power spectral density index is not within the predetermined range, adjust the speed of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determine the corresponding speed of the electric fan as the first target speed.

[0086] Specifically, the β value range for natural wind is 1.1 < β < 2, and the β value range for mechanical wind is β < 1.1. The closer the wind spectrum characteristics are to natural wind, the more beneficial it is to human thermal comfort. The aforementioned predetermined range can be (1.1, 2).

[0087] Optionally, if the first power spectral density index is not within the predetermined range, the fan speed is adjusted so that the power spectral density index of the fan is within the predetermined range, and the corresponding fan speed is determined as the first target speed. This includes: a determination step: determining a preliminary speed, which is one speed lower than the current speed; an operation step: controlling the fan to run at the preliminary speed for a first predetermined time; a calculation step: calculating the power spectral density index of the fan during the first predetermined time; repeating the determination step, the operation step, and the calculation step at least once until the power spectral density index of the fan is within the predetermined range during the first predetermined time, and determining the corresponding fan speed as the first target speed.

[0088] Optionally, if the first power spectral density index is not within the predetermined range, the method further includes: adjusting the fan speed to bring the power spectral density index within the predetermined range, and determining the corresponding fan speed as the first target speed, after which the method further includes: obtaining a first temperature and a second temperature, wherein the first temperature is the average temperature of the environment where the fan is located during the first time period, the second temperature is the average temperature of the environment where the fan is located during the second time period, and the second time period is the time period preceding and adjacent to the first time period; calculating the difference between the first temperature and the second temperature to obtain a temperature difference value; controlling the fan to operate at the first target speed if the temperature difference is within the predetermined temperature range; and determining the second target speed and adjusting the fan speed to the second target speed if the temperature difference is not within the predetermined temperature range.

[0089] Optionally, when the temperature difference is not within the predetermined temperature range, determining the second target setting includes: when the temperature difference is greater than the maximum value of the predetermined temperature range, operating the fan at one level higher than the first target setting for a second time, and calculating the second power spectral density index, where the second power spectral density index is the power spectral density index of the electric fan during the second time; when the second power spectral density index is within the predetermined range, not adjusting the fan's setting; when the second power spectral density index is not within the predetermined range, adjusting the fan's setting so that the power spectral density index of the electric fan is within the predetermined range, and determining the target setting. The corresponding speed setting of the electric fan is the second target speed setting. If the temperature difference is less than the minimum value of the predetermined temperature range, the fan is run at a speed one level lower than the first target speed setting for a third time, and a third power spectral density index is calculated. The third power spectral density index is the power spectral density index of the electric fan during the third time period. If the third power spectral density index is within the predetermined range, the speed setting of the electric fan is not adjusted. If the third power spectral density index is not within the predetermined range, the speed setting of the electric fan is adjusted so that the power spectral density index of the electric fan is within the predetermined range, and the corresponding speed setting of the electric fan is determined as the second target speed setting.

[0090] Optionally, before controlling the electric fan to be in natural wind mode, the above method includes: obtaining the initial gear of the electric fan and determining the gear intensity of the initial gear, the gear intensity being used to characterize the size of the electric fan gear; and determining the operating mode of the electric fan based at least on whether the gear intensity is within a predetermined gear range.

[0091] Optionally, the operation mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range and not equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for a fourth time, at the first gear for a fifth time, and at the second gear for a sixth time, wherein the first gear is the initial gear reduced by one gear, and the second gear is the first gear reduced by one gear; when the intensity of the gear is higher than the predetermined range and not equal to the highest gear, controlling the electric fan to operate sequentially at the intermediate gear for a seventh time, at the third gear for an eighth time, at the fourth gear for a ninth time, and at the fifth gear for a tenth time, wherein the intermediate gear is the gear whose intensity is within the predetermined range, the third gear is the intermediate gear reduced by one gear, the fourth gear is the third gear reduced by one gear, and the fifth gear is the fourth gear reduced by one gear.

[0092] Optionally, the operating mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range but equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for an eleventh time, at the sixth gear for a twelfth time, and at the seventh gear for a thirteenth time, where the sixth gear is the gear between the lowest gear and the intermediate gear, and the seventh gear is the sixth gear down one gear; when the intensity of the gear is higher than the predetermined range but equal to the highest gear, controlling the electric fan to operate sequentially at the eighth gear for a fourteenth time, at the ninth gear for a fifteenth time, at the tenth gear for a sixteenth time, and at the eleventh gear for a seventeenth time, where the eighth gear is the gear between the highest gear and the intermediate gear, the ninth gear is the eighth gear down one gear, the tenth gear is the ninth gear down one gear, and the eleventh gear is the tenth gear down one gear.

[0093] Optionally, determining the first power spectral density index based on the aforementioned wind speed includes: obtaining a first curve based on the aforementioned wind speed and corresponding time, wherein the first curve is a curve showing the relationship between the aforementioned wind speed and the aforementioned time within the aforementioned first time period; performing smoothing and fast Fourier transform processing on the aforementioned first curve sequentially to obtain a second curve, wherein the second curve is a curve showing the relationship between the frequency of the aforementioned wind speed and the power spectral density, wherein the second curve satisfies... Where v′ is the wind speed, f is the frequency, and E(f) is the power spectral density; according to E(f)=a+bf -β The spectral characteristics of the wind speed are analyzed in the form of [formula missing], and the second curve is fitted by the least squares method to obtain the power spectral density curve, where a and b are constants and β is the power spectral density exponent; the negative slope of the power spectral density curve is calculated to obtain the first power spectral density exponent.

[0094] This invention provides a processor for running a program, wherein the program executes the method for determining the speed of an electric fan.

[0095] Specifically, the methods for determining the speed setting of an electric fan include:

[0096] Step S201: Control the electric fan to be in natural wind mode and collect the wind speed of the electric fan during the first time period. The natural wind mode is a mode that simulates the wind speed and direction of natural wind. The first time period includes the current moment.

[0097] Specifically, traditional electric fans produce a harsh, uncomfortable breeze, while the gentle breeze from nature feels comfortable. Therefore, setting an electric fan to natural wind mode makes people feel more comfortable. Sensors can monitor changes in the fan's wind speed. The first time period mentioned above can include a 30-minute duration, encompassing the current moment. In other words, by collecting wind speed data over a recent period, subsequent adjustments to the fan's speed based on this data can be made more accurate.

[0098] Step S202: Based on the wind speed, determine the first power spectral density index, which is the power spectral density index of the electric fan during the first time period.

[0099] Specifically, the power spectral density index of a wind speed curve is a parameter that describes the frequency distribution characteristics of wind speed over time. It can reflect the energy distribution of the wind speed curve at different frequencies.

[0100] Step S203: If the first power spectral density index is within a predetermined range, do not adjust the speed of the electric fan.

[0101] Specifically, when the first power spectral density index is within a predetermined range, it indicates that the fan speed is comfortable, and the fan speed should not be adjusted.

[0102] Step S204: If the first power spectral density index is not within the predetermined range, adjust the speed of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determine the corresponding speed of the electric fan as the first target speed.

[0103] Specifically, the β value range for natural wind is 1.1 < β < 2, and the β value range for mechanical wind is β < 1.1. The closer the wind spectrum characteristics are to natural wind, the more beneficial it is to human thermal comfort. The aforementioned predetermined range can be (1.1, 2).

[0104] Optionally, if the first power spectral density index is not within the predetermined range, the fan speed is adjusted so that the power spectral density index of the fan is within the predetermined range, and the corresponding fan speed is determined as the first target speed. This includes: a determination step: determining a preliminary speed, which is one speed lower than the current speed; an operation step: controlling the fan to run at the preliminary speed for a first predetermined time; a calculation step: calculating the power spectral density index of the fan during the first predetermined time; repeating the determination step, the operation step, and the calculation step at least once until the power spectral density index of the fan is within the predetermined range during the first predetermined time, and determining the corresponding fan speed as the first target speed.

[0105] Optionally, if the first power spectral density index is not within the predetermined range, the method further includes: adjusting the fan speed to bring the power spectral density index within the predetermined range, and determining the corresponding fan speed as the first target speed, after which the method further includes: obtaining a first temperature and a second temperature, wherein the first temperature is the average temperature of the environment where the fan is located during the first time period, the second temperature is the average temperature of the environment where the fan is located during the second time period, and the second time period is the time period preceding and adjacent to the first time period; calculating the difference between the first temperature and the second temperature to obtain a temperature difference value; controlling the fan to operate at the first target speed if the temperature difference is within the predetermined temperature range; and determining the second target speed and adjusting the fan speed to the second target speed if the temperature difference is not within the predetermined temperature range.

[0106] Optionally, when the temperature difference is not within the predetermined temperature range, determining the second target setting includes: when the temperature difference is greater than the maximum value of the predetermined temperature range, operating the fan at one level higher than the first target setting for a second time, and calculating the second power spectral density index, where the second power spectral density index is the power spectral density index of the electric fan during the second time; when the second power spectral density index is within the predetermined range, not adjusting the fan's setting; when the second power spectral density index is not within the predetermined range, adjusting the fan's setting so that the power spectral density index of the electric fan is within the predetermined range, and determining the target setting. The corresponding speed setting of the electric fan is the second target speed setting. If the temperature difference is less than the minimum value of the predetermined temperature range, the fan is run at a speed one level lower than the first target speed setting for a third time, and a third power spectral density index is calculated. The third power spectral density index is the power spectral density index of the electric fan during the third time period. If the third power spectral density index is within the predetermined range, the speed setting of the electric fan is not adjusted. If the third power spectral density index is not within the predetermined range, the speed setting of the electric fan is adjusted so that the power spectral density index of the electric fan is within the predetermined range, and the corresponding speed setting of the electric fan is determined as the second target speed setting.

[0107] Optionally, before controlling the electric fan to be in natural wind mode, the above method includes: obtaining the initial gear of the electric fan and determining the gear intensity of the initial gear, the gear intensity being used to characterize the size of the electric fan gear; and determining the operating mode of the electric fan based at least on whether the gear intensity is within a predetermined gear range.

[0108] Optionally, the operation mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range and not equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for a fourth time, at the first gear for a fifth time, and at the second gear for a sixth time, wherein the first gear is the initial gear reduced by one gear, and the second gear is the first gear reduced by one gear; when the intensity of the gear is higher than the predetermined range and not equal to the highest gear, controlling the electric fan to operate sequentially at the intermediate gear for a seventh time, at the third gear for an eighth time, at the fourth gear for a ninth time, and at the fifth gear for a tenth time, wherein the intermediate gear is the gear whose intensity is within the predetermined range, the third gear is the intermediate gear reduced by one gear, the fourth gear is the third gear reduced by one gear, and the fifth gear is the fourth gear reduced by one gear.

[0109] Optionally, the operating mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range but equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for an eleventh time, at the sixth gear for a twelfth time, and at the seventh gear for a thirteenth time, where the sixth gear is the gear between the lowest gear and the intermediate gear, and the seventh gear is the sixth gear down one gear; when the intensity of the gear is higher than the predetermined range but equal to the highest gear, controlling the electric fan to operate sequentially at the eighth gear for a fourteenth time, at the ninth gear for a fifteenth time, at the tenth gear for a sixteenth time, and at the eleventh gear for a seventeenth time, where the eighth gear is the gear between the highest gear and the intermediate gear, the ninth gear is the eighth gear down one gear, the tenth gear is the ninth gear down one gear, and the eleventh gear is the tenth gear down one gear.

[0110] Optionally, determining the first power spectral density index based on the aforementioned wind speed includes: obtaining a first curve based on the aforementioned wind speed and corresponding time, wherein the first curve is a curve showing the relationship between the aforementioned wind speed and the aforementioned time within the aforementioned first time period; performing smoothing and fast Fourier transform processing on the aforementioned first curve sequentially to obtain a second curve, wherein the second curve is a curve showing the relationship between the frequency of the aforementioned wind speed and the power spectral density, wherein the second curve satisfies... Where v′ is the wind speed, f is the frequency, and E(f) is the power spectral density; according to E(f)=a+bf -β The spectral characteristics of the wind speed are analyzed in the form of [formula missing], and the second curve is fitted by the least squares method to obtain the power spectral density curve, where a and b are constants and β is the power spectral density exponent; the negative slope of the power spectral density curve is calculated to obtain the first power spectral density exponent.

[0111] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0112] Step S201: Control the electric fan to be in natural wind mode and collect the wind speed of the electric fan during the first time period. The natural wind mode is a mode that simulates the wind speed and direction of natural wind. The first time period includes the current moment.

[0113] Step S202: Based on the wind speed, determine the first power spectral density index, which is the power spectral density index of the electric fan during the first time period.

[0114] Step S203: If the first power spectral density index is within a predetermined range, do not adjust the speed of the electric fan.

[0115] Step S204: If the first power spectral density index is not within the predetermined range, adjust the speed of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determine the corresponding speed of the electric fan as the first target speed.

[0116] Optionally, if the first power spectral density index is not within the predetermined range, the fan speed is adjusted so that the power spectral density index of the fan is within the predetermined range, and the corresponding fan speed is determined as the first target speed. This includes: a determination step: determining a preliminary speed, which is one speed lower than the current speed; an operation step: controlling the fan to run at the preliminary speed for a first predetermined time; a calculation step: calculating the power spectral density index of the fan during the first predetermined time; repeating the determination step, the operation step, and the calculation step at least once until the power spectral density index of the fan is within the predetermined range during the first predetermined time, and determining the corresponding fan speed as the first target speed.

[0117] Optionally, if the first power spectral density index is not within the predetermined range, the method further includes: adjusting the fan speed to bring the power spectral density index within the predetermined range, and determining the corresponding fan speed as the first target speed, after which the method further includes: obtaining a first temperature and a second temperature, wherein the first temperature is the average temperature of the environment where the fan is located during the first time period, the second temperature is the average temperature of the environment where the fan is located during the second time period, and the second time period is the time period preceding and adjacent to the first time period; calculating the difference between the first temperature and the second temperature to obtain a temperature difference value; controlling the fan to operate at the first target speed if the temperature difference is within the predetermined temperature range; and determining the second target speed and adjusting the fan speed to the second target speed if the temperature difference is not within the predetermined temperature range.

[0118] Optionally, when the temperature difference is not within the predetermined temperature range, determining the second target setting includes: when the temperature difference is greater than the maximum value of the predetermined temperature range, operating the fan at one level higher than the first target setting for a second time, and calculating the second power spectral density index, where the second power spectral density index is the power spectral density index of the electric fan during the second time; when the second power spectral density index is within the predetermined range, not adjusting the fan's setting; when the second power spectral density index is not within the predetermined range, adjusting the fan's setting so that the power spectral density index of the electric fan is within the predetermined range, and determining the target setting. The corresponding speed setting of the electric fan is the second target speed setting. If the temperature difference is less than the minimum value of the predetermined temperature range, the fan is run at a speed one level lower than the first target speed setting for a third time, and a third power spectral density index is calculated. The third power spectral density index is the power spectral density index of the electric fan during the third time period. If the third power spectral density index is within the predetermined range, the speed setting of the electric fan is not adjusted. If the third power spectral density index is not within the predetermined range, the speed setting of the electric fan is adjusted so that the power spectral density index of the electric fan is within the predetermined range, and the corresponding speed setting of the electric fan is determined as the second target speed setting.

[0119] Optionally, before controlling the electric fan to be in natural wind mode, the above method includes: obtaining the initial gear of the electric fan and determining the gear intensity of the initial gear, the gear intensity being used to characterize the size of the electric fan gear; and determining the operating mode of the electric fan based at least on whether the gear intensity is within a predetermined gear range.

[0120] Optionally, the operation mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range and not equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for a fourth time, at the first gear for a fifth time, and at the second gear for a sixth time, wherein the first gear is the initial gear reduced by one gear, and the second gear is the first gear reduced by one gear; when the intensity of the gear is higher than the predetermined range and not equal to the highest gear, controlling the electric fan to operate sequentially at the intermediate gear for a seventh time, at the third gear for an eighth time, at the fourth gear for a ninth time, and at the fifth gear for a tenth time, wherein the intermediate gear is the gear whose intensity is within the predetermined range, the third gear is the intermediate gear reduced by one gear, the fourth gear is the third gear reduced by one gear, and the fifth gear is the fourth gear reduced by one gear.

[0121] Optionally, the operating mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range but equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for an eleventh time, at the sixth gear for a twelfth time, and at the seventh gear for a thirteenth time, where the sixth gear is the gear between the lowest gear and the intermediate gear, and the seventh gear is the sixth gear down one gear; when the intensity of the gear is higher than the predetermined range but equal to the highest gear, controlling the electric fan to operate sequentially at the eighth gear for a fourteenth time, at the ninth gear for a fifteenth time, at the tenth gear for a sixteenth time, and at the eleventh gear for a seventeenth time, where the eighth gear is the gear between the highest gear and the intermediate gear, the ninth gear is the eighth gear down one gear, the tenth gear is the ninth gear down one gear, and the eleventh gear is the tenth gear down one gear.

[0122] Optionally, determining the first power spectral density index based on the aforementioned wind speed includes: obtaining a first curve based on the aforementioned wind speed and corresponding time, wherein the first curve is a curve showing the relationship between the aforementioned wind speed and the aforementioned time within the aforementioned first time period; performing smoothing and fast Fourier transform processing on the aforementioned first curve sequentially to obtain a second curve, wherein the second curve is a curve showing the relationship between the frequency of the aforementioned wind speed and the power spectral density, wherein the second curve satisfies... Where v′ is the wind speed, f is the frequency, and E(f) is the power spectral density; according to E(f)=a+bf -β The spectral characteristics of the wind speed are analyzed in the form of [formula missing], and the second curve is fitted by the least squares method to obtain the power spectral density curve, where a and b are constants and β is the power spectral density exponent; the negative slope of the power spectral density curve is calculated to obtain the first power spectral density exponent.

[0123] The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0124] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps:

[0125] Step S201: Control the electric fan to be in natural wind mode and collect the wind speed of the electric fan during the first time period. The natural wind mode is a mode that simulates the wind speed and direction of natural wind. The first time period includes the current moment.

[0126] Step S202: Based on the wind speed, determine the first power spectral density index, which is the power spectral density index of the electric fan during the first time period.

[0127] Step S203: If the first power spectral density index is within a predetermined range, do not adjust the speed of the electric fan.

[0128] Step S204: If the first power spectral density index is not within the predetermined range, adjust the speed of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determine the corresponding speed of the electric fan as the first target speed.

[0129] Optionally, if the first power spectral density index is not within the predetermined range, the fan speed is adjusted so that the power spectral density index of the fan is within the predetermined range, and the corresponding fan speed is determined as the first target speed. This includes: a determination step: determining a preliminary speed, which is one speed lower than the current speed; an operation step: controlling the fan to run at the preliminary speed for a first predetermined time; a calculation step: calculating the power spectral density index of the fan during the first predetermined time; repeating the determination step, the operation step, and the calculation step at least once until the power spectral density index of the fan is within the predetermined range during the first predetermined time, and determining the corresponding fan speed as the first target speed.

[0130] Optionally, if the first power spectral density index is not within the predetermined range, the method further includes: adjusting the fan speed to bring the power spectral density index within the predetermined range, and determining the corresponding fan speed as the first target speed, after which the method further includes: obtaining a first temperature and a second temperature, wherein the first temperature is the average temperature of the environment where the fan is located during the first time period, the second temperature is the average temperature of the environment where the fan is located during the second time period, and the second time period is the time period preceding and adjacent to the first time period; calculating the difference between the first temperature and the second temperature to obtain a temperature difference value; controlling the fan to operate at the first target speed if the temperature difference is within the predetermined temperature range; and determining the second target speed and adjusting the fan speed to the second target speed if the temperature difference is not within the predetermined temperature range.

[0131] Optionally, when the temperature difference is not within the predetermined temperature range, determining the second target setting includes: when the temperature difference is greater than the maximum value of the predetermined temperature range, operating the fan at one level higher than the first target setting for a second time, and calculating the second power spectral density index, where the second power spectral density index is the power spectral density index of the electric fan during the second time; when the second power spectral density index is within the predetermined range, not adjusting the fan's setting; when the second power spectral density index is not within the predetermined range, adjusting the fan's setting so that the power spectral density index of the electric fan is within the predetermined range, and determining the target setting. The corresponding speed setting of the electric fan is the second target speed setting. If the temperature difference is less than the minimum value of the predetermined temperature range, the fan is run at a speed one level lower than the first target speed setting for a third time, and a third power spectral density index is calculated. The third power spectral density index is the power spectral density index of the electric fan during the third time period. If the third power spectral density index is within the predetermined range, the speed setting of the electric fan is not adjusted. If the third power spectral density index is not within the predetermined range, the speed setting of the electric fan is adjusted so that the power spectral density index of the electric fan is within the predetermined range, and the corresponding speed setting of the electric fan is determined as the second target speed setting.

[0132] Optionally, before controlling the electric fan to be in natural wind mode, the above method includes: obtaining the initial gear of the electric fan and determining the gear intensity of the initial gear, the gear intensity being used to characterize the size of the electric fan gear; and determining the operating mode of the electric fan based at least on whether the gear intensity is within a predetermined gear range.

[0133] Optionally, the operation mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range and not equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for a fourth time, at the first gear for a fifth time, and at the second gear for a sixth time, wherein the first gear is the initial gear reduced by one gear, and the second gear is the first gear reduced by one gear; when the intensity of the gear is higher than the predetermined range and not equal to the highest gear, controlling the electric fan to operate sequentially at the intermediate gear for a seventh time, at the third gear for an eighth time, at the fourth gear for a ninth time, and at the fifth gear for a tenth time, wherein the intermediate gear is the gear whose intensity is within the predetermined range, the third gear is the intermediate gear reduced by one gear, the fourth gear is the third gear reduced by one gear, and the fifth gear is the fourth gear reduced by one gear.

[0134] Optionally, the operating mode of the electric fan is determined at least based on whether the intensity of the gear is within a predetermined range, including: when the intensity of the gear is lower than the predetermined range but equal to the lowest gear, controlling the electric fan to operate sequentially at the initial gear for an eleventh time, at the sixth gear for a twelfth time, and at the seventh gear for a thirteenth time, where the sixth gear is the gear between the lowest gear and the intermediate gear, and the seventh gear is the sixth gear down one gear; when the intensity of the gear is higher than the predetermined range but equal to the highest gear, controlling the electric fan to operate sequentially at the eighth gear for a fourteenth time, at the ninth gear for a fifteenth time, at the tenth gear for a sixteenth time, and at the eleventh gear for a seventeenth time, where the eighth gear is the gear between the highest gear and the intermediate gear, the ninth gear is the eighth gear down one gear, the tenth gear is the ninth gear down one gear, and the eleventh gear is the tenth gear down one gear.

[0135] Optionally, determining the first power spectral density index based on the aforementioned wind speed includes: obtaining a first curve based on the aforementioned wind speed and corresponding time, wherein the first curve is a curve showing the relationship between the aforementioned wind speed and the aforementioned time within the aforementioned first time period; performing smoothing and fast Fourier transform processing on the aforementioned first curve sequentially to obtain a second curve, wherein the second curve is a curve showing the relationship between the frequency of the aforementioned wind speed and the power spectral density, wherein the second curve satisfies... Where v′ is the wind speed, f is the frequency, and E(f) is the power spectral density; according to E(f)=a+bf -β The spectral characteristics of the wind speed are analyzed in the form of [formula missing], and the second curve is fitted by the least squares method to obtain the power spectral density curve, where a and b are constants and β is the power spectral density exponent; the negative slope of the power spectral density curve is calculated to obtain the first power spectral density exponent.

[0136] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0137] 1) The method for determining the speed of the electric fan in this application includes: controlling the electric fan to be in natural wind mode and collecting the wind speed of the electric fan during a first time period, wherein the natural wind mode is a mode that simulates the wind speed and direction of natural wind, and the first time period includes the current moment; determining a first power spectral density index based on the wind speed, wherein the first power spectral density index is the power spectral density index of the electric fan during the first time period; not adjusting the speed of the electric fan when the first power spectral density index is within a predetermined range; and adjusting the speed of the electric fan when the first power spectral density index is not within the predetermined range, so that the power spectral density index of the electric fan is within the predetermined range, and determining the corresponding speed of the electric fan as a first target speed. This method calculates the first power spectral density index of the wind speed in the first time period under natural wind mode. It determines whether to adjust the speed of the electric fan based on whether the first power spectral density index is within a predetermined range. If the first power spectral density index is not within the predetermined range, the speed of the electric fan is adjusted to the first target speed so that the power spectral density index of the electric fan is within the predetermined range. This allows the selection of a suitable speed as the control speed when the natural wind mode is turned on, thereby improving the user's comfort experience during use and solving the problem of poor comfort experience in the natural wind mode in the prior art.

[0138] 2) The device for determining the speed of the electric fan as described in this application includes a first control unit, a first determining unit, a first processing unit, and a second processing unit. The first control unit controls the electric fan to be in natural wind mode and collects the fan's wind speed within a first time period. The natural wind mode simulates the wind speed and direction of natural wind. The first time period includes the current moment. The first determining unit determines a first power spectral density index based on the wind speed. The first power spectral density index is the power spectral density index of the electric fan within the first time period. The first processing unit does not adjust the fan speed if the first power spectral density index is within a predetermined range. The second processing unit adjusts the fan speed if the first power spectral density index is outside the predetermined range, so that the fan's power spectral density index is within the predetermined range, and determines the corresponding fan speed as a first target speed. This device calculates the first power spectral density index of the wind speed during a first time period in natural wind mode. It determines whether to adjust the fan speed based on whether the first power spectral density index is within a predetermined range. If the first power spectral density index is not within the predetermined range, it adjusts the fan speed to the first target speed so that the fan's power spectral density index is within the predetermined range. This allows the selection of a suitable speed as the control speed when natural wind mode is activated, improving the user's comfort experience during use and thus solving the problem of poor comfort experience in natural wind mode in the prior art.

[0139] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for determining the speed setting of an electric fan, characterized in that, include: The electric fan is controlled to be in natural wind mode and the wind speed of the electric fan is collected during a first time period. The natural wind mode is a mode that simulates the wind speed and direction of natural wind. The first time period includes the current moment. Based on the wind speed, a first power spectral density index is determined, wherein the first power spectral density index is the power spectral density index of the electric fan during the first time period. If the first power spectral density index is within a predetermined range, the speed of the electric fan will not be adjusted. If the first power spectral density index is not within the predetermined range, adjust the speed of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determine the corresponding speed of the electric fan as the first target speed.

2. The method for determining the speed setting of an electric fan according to claim 1, characterized in that, If the first power spectral density index is not within the predetermined range, adjust the speed of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determine the corresponding speed of the electric fan as the first target speed, including: Determine the following steps: Determine the preparatory gear, which is one gear lower than the current gear; Operating steps: Control the electric fan to run at the pre-set speed for a first predetermined time; Calculation steps: Calculate the power spectral density index of the electric fan within the first predetermined time period; The determination step, the operation step, and the calculation step are repeated at least once in sequence until the power spectral density index of the electric fan is within the predetermined range within the first predetermined time, and the corresponding speed of the electric fan is determined as the first target speed.

3. The method for determining the speed setting of an electric fan according to claim 1, characterized in that, If the first power spectral density index is not within the predetermined range, the method further includes adjusting the speed of the electric fan so that the power spectral density index of the electric fan is within the predetermined range, and determining the corresponding speed of the electric fan as the first target speed. A first temperature and a second temperature are obtained. The first temperature is the average temperature of the environment where the electric fan is located during the first time period, and the second temperature is the average temperature of the environment where the electric fan is located during the second time period. The second time period is the time period before the first time period and adjacent to the first time period. Calculate the difference between the first temperature and the second temperature to obtain the temperature difference value; When the temperature difference is within a predetermined temperature range, the electric fan is controlled to operate at the first target speed. If the temperature difference is not within the predetermined temperature range, a second target setting is determined, and the setting of the electric fan is adjusted to the second target setting.

4. The method for determining the speed setting of an electric fan according to claim 3, characterized in that, Determining a second target setting when the temperature difference is not within the predetermined temperature range includes: If the temperature difference is greater than the maximum value of the predetermined temperature range, the fan is operated at one level higher than the first target level for a second time, and a second power spectral density index is calculated. The second power spectral density index is the power spectral density index of the electric fan during the second time. If the second power spectral density index is within the predetermined range, the fan level is not adjusted. If the second power spectral density index is not within the predetermined range, the fan level is adjusted so that the power spectral density index of the electric fan is within the predetermined range, and the corresponding fan level is determined as the second target level. If the temperature difference is less than the minimum of the predetermined temperature range, the fan is operated at a lower speed than the first target speed for a third time, and a third power spectral density index is calculated. The third power spectral density index is the power spectral density index of the electric fan during the third time. If the third power spectral density index is within the predetermined range, the speed of the electric fan is not adjusted. If the third power spectral density index is not within the predetermined range, the speed of the electric fan is adjusted so that the power spectral density index of the electric fan is within the predetermined range, and the corresponding speed of the electric fan is determined as the second target speed.

5. The method for determining the speed setting of an electric fan according to claim 1, characterized in that, Before controlling the electric fan to be in natural wind mode, the method includes: Obtain the initial speed setting of the electric fan and determine the speed intensity of the initial speed setting, wherein the speed intensity is used to characterize the size of the electric fan speed setting; The operating mode of the electric fan is determined based at least on whether the intensity of the setting is within the predetermined range.

6. The method for determining the speed setting of an electric fan according to claim 5, characterized in that, The operating mode of the electric fan is determined based on at least whether the intensity level is within a predetermined range, including: When the intensity of the gear is lower than the predetermined gear range and not equal to the lowest gear, the electric fan is controlled to run at the initial gear for a fourth time, at the first gear for a fifth time, and at the second gear for a sixth time in sequence. The first gear is one gear lower than the initial gear, and the second gear is one gear lower than the first gear. When the intensity of the gear is higher than the predetermined gear range but not equal to the highest gear, the electric fan is controlled to run at the middle gear for a seventh time, at the third gear for an eighth time, at the fourth gear for a ninth time, and at the fifth gear for a tenth time in sequence. The middle gear is the gear whose intensity is within the predetermined gear range. The third gear is the middle gear down one gear. The fourth gear is the third gear down one gear. The fifth gear is the fourth gear down one gear.

7. The method for determining the speed setting of an electric fan according to claim 6, characterized in that, The operating mode of the electric fan is determined based on at least whether the intensity level is within a predetermined range, including: When the intensity of the gear is lower than the predetermined gear range but equal to the lowest gear, the electric fan is controlled to run at the initial gear for an eleventh time, at the sixth gear for a twelfth time, and at the seventh gear for a thirteenth time in sequence. The sixth gear is the gear between the lowest gear and the intermediate gear, and the seventh gear is the sixth gear down one gear. When the intensity of the gear is higher than the predetermined gear range and equal to the highest gear, the electric fan is controlled to run at the eighth gear for the fourteenth time, at the ninth gear for the fifteenth time, at the tenth gear for the sixteenth time, and at the eleventh gear for the seventeenth time in sequence. The eighth gear is the gear between the highest gear and the intermediate gear. The ninth gear is the eighth gear down by one gear. The tenth gear is the ninth gear down by one gear. The eleventh gear is the tenth gear down by one gear.

8. The method for determining the speed setting of an electric fan according to any one of claims 1 to 7, characterized in that, Based on the wind speed, the first power spectral density index is determined, including: Based on the wind speed and the corresponding time, a first curve is obtained, which is the relationship curve between the wind speed and the time within the first time period; The first curve is then smoothed and subjected to a Fast Fourier Transform to obtain a second curve, which represents the relationship between the frequency and power spectral density of the wind speed. The second curve satisfies... Where v′ is the wind speed, f is the frequency, and E(f) is the power spectral density; According to E(f) = a + bf -β The spectral characteristics of the wind speed are analyzed in the form of [missing information], and the second curve is fitted by the least squares method to obtain the power spectrum curve, where a and b are constants and β is the power spectral density exponent. The negative slope of the power spectrum curve is calculated to obtain the first power spectral density index.

9. A device for determining the speed setting of an electric fan, characterized in that, include: The first control unit is used to control the electric fan to be in natural wind mode and to collect the wind speed of the electric fan during a first time period. The natural wind mode is a mode that simulates the wind speed and direction of natural wind. The first time period includes the current moment. The first determining unit is configured to determine a first power spectral density index based on the wind speed, wherein the first power spectral density index is the power spectral density index of the electric fan during the first time period. The first processing unit is configured to not adjust the speed of the electric fan when the first power spectral density index is within a predetermined range. The second processing unit is configured to adjust the speed of the electric fan when the first power spectral density index is not within the predetermined range, so that the power spectral density index of the electric fan is within the predetermined range, and to determine the corresponding speed of the electric fan as the first target speed.

10. An electronic device, characterized in that, include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including a method for performing a fan speed determination method according to any one of claims 1 to 8.

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