Adjustable pitch fan

Abstract

The utility model relates to an adjustable gear fan, including fan assembly, speed regulation unit and control unit, the control unit is based on the signal of speed regulation unit produces the PWM signal duty ratio, and according to the PWM signal duty ratio adjusts the rotating speed of fan assembly. Adopt such scheme, through the change PWM signal's duty ratio, can accurately control fan assembly both ends average voltage. The higher duty ratio, the higher average voltage, the faster fan assembly rotating speed is, on the contrary, the lower duty ratio, the slower fan assembly rotating speed is. This accurate speed regulation mode can adjust fan assembly wind speed to the suitable level according to actual demand.

Description

[0001] This application claims priority to PCT / CN2024 / 107360, filed on July 24, 2024. The entire contents of that PCT international application, with the China National Intellectual Property Administration as the receiving office, are incorporated herein by reference as part of the disclosure of this application. Technical Field

[0002] This utility model relates to the field of household appliance technology, and in particular to an adjustable fan. Background Technology

[0003] Traditional portable fans typically adjust speed by connecting resistors of varying resistance values ​​in series within the fan circuit. This alters the current flowing through the circuit, thus controlling the fan's speed and speed. A higher resistance results in a lower current and a lower fan speed; conversely, a lower resistance leads to a higher fan speed and speed. However, this method consumes a significant amount of electrical energy, which is converted into heat, making it inefficient. Furthermore, it offers a limited speed range and lacks precision.

[0004] Therefore, improving the user experience of fan speed control and enabling more flexible fan speed adjustment is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] Therefore, it is necessary to provide an adjustable speed fan to address the aforementioned technical problems.

[0006] An adjustable fan includes a fan assembly, a speed control unit, and a control unit. The control unit calculates the duty cycle of a PWM signal based on a signal generated by the speed control unit and adjusts the speed of the fan assembly according to the duty cycle of the PWM signal.

[0007] This approach allows for precise control of the average voltage across the fan assembly by altering the duty cycle of the PWM signal. A higher duty cycle results in a higher average voltage and a faster fan speed; conversely, a lower duty cycle leads to a slower fan speed. This precise speed control method allows the fan speed to be adjusted to an appropriate level based on actual needs.

[0008] An adjustable fan includes:

[0009] A fan assembly, configured to have Y speed settings, wherein each of the Y speed settings has a corresponding operating speed; and

[0010] A speed control unit and a control unit are provided. The control unit is electrically connected to the fan assembly. The speed control unit includes a shift switch and a gear shift switch, which are electrically connected to the control unit. The control unit responds to the action of the shift switch to change the fan assembly by M gears. The control unit is used to change the value of M in response to the action of the gear shift switch, where Y>M≥1.

[0011] This technical solution achieves both rapid adjustment to the target gear and precise gear control by simply setting up a shift-up control and a gear-distance control. For example, when a user needs to quickly shift from gear 1 to gear 50, the gear-distance control changes the M value, which represents the amount of gear change. A larger M value indicates a larger gear shift in the fan assembly when the shift-up control is activated. Conversely, when a user needs to shift from gear 50 to gear 51, the gear-distance control changes the M value; a smaller M value indicates a smaller gear shift in the fan assembly when the gear-distance control is activated. This achieves both rapid adjustment to the target gear and precise gear control. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structural components of a fan in one embodiment of this application;

[0013] Figure 2 This is a schematic diagram of the physical structure of a fan in one embodiment of this application;

[0014] Figure 3 This is a schematic diagram of the fan speed control unit in one embodiment of this application;

[0015] Figure 4 This is a schematic diagram of a fan with a touch screen in one embodiment of this application;

[0016] Figure 5 This is a schematic diagram of a fan with a touch element in one embodiment of this application;

[0017] Figure 6 This is a schematic diagram of the circuit principle of the touch device in one embodiment of this application;

[0018] Figure 7 For the purposes of this application Figure 2 A schematic diagram of the speed control unit in the embodiment shown;

[0019] Figure 8 for Figure 7 The front view of the rotating component shown;

[0020] Figure 9 for Figure 7 The first schematic diagram in the illustrated embodiment generates the forward and reverse signals;

[0021] Figure 10 for Figure 9 The signal waveform diagram in the embodiment shown;

[0022] Figure 11 for Figure 7 The illustrated embodiment shows a second schematic diagram for generating forward and reverse signals;

[0023] Figure 12 for Figure 11 The signal waveform diagram in the embodiment shown;

[0024] Figure 13-1 This is a diagram showing the relationship between gear position and speed in one embodiment of this application;

[0025] Figure 13-2 This is a diagram showing the correspondence between M values ​​in one embodiment of this application;

[0026] Figure 14 This is a schematic diagram of the structural components of a fan in another embodiment of this application;

[0027] Figure 15 This is a schematic diagram of the structure of the control unit in one embodiment of this application;

[0028] Figure 16 , Figure 17 , Figure 18 and Figure 19 These are schematic diagrams of the physical structure of the fan in four embodiments of this application. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more complete description of it is provided below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0030] To fully understand this application, detailed structures and steps will be presented in the following description to illustrate the technical solutions proposed in this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0031] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0033] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0036] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0037] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0038] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0039] Figure 1 This is a schematic diagram of the structural components of a fan in one embodiment of this application. Figure 2 This is a schematic diagram of the physical structure of a fan according to one embodiment of this application. See also... Figure 1 and Figure 2 The fan includes a fan assembly 10 and a speed control unit 30. The speed control unit 30 can respond to user operations and cause the fan assembly 10 to respond accordingly. For example, when the user increases the speed of the fan assembly 10 by operation, the speed control unit 30 can convert the user's physical operation into a corresponding electrical signal. The fan assembly 10 receives the electrical signal directly or indirectly and increases its rotation speed.

[0040] In the international patent application PCT / CN2024 / 107360, the input module can be used as an embodiment of the speed control unit 30 in this application, and the control module can be used as an embodiment of the control unit 20 in this application. In other embodiments, the control module and the drive module can jointly serve as an embodiment of the control unit 20 in this application.

[0041] In one embodiment, the fan assembly may further include a control unit 20, a speed regulating unit 30 directly or indirectly connected to the control unit 20, and a fan assembly 10 directly or indirectly connected to the control unit 20. A user can operate the speed regulating unit 30, which converts the user's operation into an electrical signal. The control unit 20 receives this electrical signal and further converts it into an electrical signal capable of controlling the fan assembly 10. The fan assembly 10 responds to the electrical signal from the control unit 20 to change its rotation speed.

[0042] The fan assembly 10 is configured to have Y gears, which can be three, five, one hundred, etc., and different numbers of gears can be used according to different designs.

[0043] For example, taking one hundred speed settings as an example, each speed setting of the fan assembly 10 has a corresponding operating speed. For instance, in the first speed setting, the fan assembly 10 operates at a lower speed; in the second speed setting, the speed of the fan assembly 10 is higher than that of the first speed setting, and so on, until the one hundredth speed setting has the maximum operating speed of the fan assembly 10. The speed variation between adjacent speed settings can be designed to be the same or different as needed. In another embodiment, the speed settings of the fan assembly 10 can also be designed to have a maximum speed setting of one hundredth, and the speed settings of the fan assembly 10 can be designed to vary in increments of one percent of the maximum speed setting. For example, the minimum speed setting is the first speed setting, and the operating speed of the first speed setting is one percent of the maximum speed setting; the operating speed of the second speed setting is two percent of the maximum speed setting, and so on, until the one hundredth speed setting is one hundred percent of the maximum operating speed setting.

[0044] In one embodiment, a fan assembly is disclosed, including: a fan assembly 10, a speed control unit 30, and a control unit 20; wherein, the fan assembly 10 is configured to include at least three speed levels from low to high; the speed control unit 30 is used to generate a gear skipping signal and a gear interval signal, and the speed control unit 30 is used to continuously change the gear multiple times in response to a single operation by a user; the control unit 20 is used to receive the gear skipping signal and the gear interval signal, and change the number of gear changes indicated by the gear skipping signal based on the gear interval signal, and output a speed change signal based on the changed gear; the fan assembly 10 receives the speed change signal and responds to the speed indicated by the speed change signal.

[0045] Specifically, the fan assembly 10 is configured to include at least three speed levels from low to high. Using 100 speed levels as an example, the speed control unit 30 generates a speed-jumping signal and a speed-distance signal in response to user operation. The speed-jumping signal is used to change the speed, for example, from level 1 to level 2, or from level 1 to level 10, or from level 100 to level 80. The speed-distance signal controls the magnitude of the speed change represented by the speed-jumping signal. By changing the speed-distance signal, the speed-jumping signal can represent a single speed change or multiple speed changes. The final number of speed changes in the fan assembly 10 is controlled by the duration of the speed-jumping signal. For example, the system presets that the speed changes twice per second during the duration of the speed-jumping signal. If the speed-jumping signal lasts for 2 seconds, during which the speed changes 4 times, and assuming the speed-distance signal represents a 3-speed change per speed change, then a total of 12 speed changes occur during this process.

[0046] The control unit 20 processes the signals, specifically receiving the gear shift signal and gear distance signal transmitted by the speed control unit 30, and converting them into electrical signals for controlling the speed of the fan assembly 10. Specifically, the control unit 20 changes the number of gear shifts indicated by the gear shift signal based on the received gear distance signal, and outputs a speed change signal based on the changed gear. The fan assembly 10 receives this speed change signal and, in response to the speed indicated by the speed change signal, for example, if the target speed indicated by the speed change signal is the speed corresponding to gear 50, the fan assembly 10 adjusts to the corresponding speed.

[0047] Compared with traditional continuously variable speed (CVT) fans, the fan in the above embodiment has significant advantages. For example, a traditional CVT fan, by operating the speed control unit 30, can change the wind speed at a fixed rate. For instance, if the system is set to change the wind speed by one percent, the speed control unit 30 includes a speed control knob 311. Rotating the speed control knob 311 by 30° increases the wind speed from one percent to three percent; that is, every 10° rotation of the speed control knob 311 changes the wind speed by one percent. If the wind speed needs to be adjusted from one percent to one hundred percent, the speed control knob 311 needs to be rotated 1000°, meaning it needs to be rotated nearly three times. This makes the operation cumbersome and cannot quickly respond to user needs. In the above embodiment, the user generates a speed-jump signal and a speed interval signal by operating the speed control unit 30. Different user operation methods can generate different speed-jump signals and speed interval signals. The speed interval signal can change the granularity of the speed-jump signal's control over the speed, enabling both fine-tuning and rapid adjustment of the fan speed.

[0048] In one embodiment, the speed control unit 30 is used to continuously change gears multiple times in response to a single user operation. For example, the speed control unit 30 may include a speed control operating component 310, which can change gears multiple times in response to a single user operation. During a single operation, the user can clearly perceive the granularity of gear control. The granularity of gear changes refers to the difference between the initial and subsequent operation processes during the user's operation. A higher number of gear changes results in a larger granularity, and a lower number of gear changes results in a smaller granularity. In other words, when the user changes the speed of the fan assembly 10 by operating the speed control operating component 310, the fan assembly 10 can change its speed in response to the user's operational displacement and speed detected by the speed control operating component 310. The speed control unit 30 generates a gear skipping signal and a gear distance signal by collecting the user's operation mode through the speed control operating component 310. The gear distance signal and the gear skipping signal can jointly control the speed of the fan assembly 10. The gear shift signal can be generated based on the user's operating displacement, and the gear interval signal can be generated based on the user's operating speed. When the user's operating speed is a first speed and the operating displacement is X, the fan assembly 10 changes M gears; when the user's operating speed is a second speed less than the first speed and the operating displacement is still X, the fan assembly 10 can change N gears, where X>0 and M>N. For example, when the user's operating speed is the first speed and the operating displacement is 15°, the fan assembly 10 can change seventy gears; when the user's operating speed is a second speed less than the first speed and the operating displacement is 15°, the fan assembly 10 can change ten gears. Therefore, when the user operates the speed control component 310 at the first speed and with an operating displacement of 15°, the gear can be quickly increased from one to seventy. When the user continues to operate the speed control component 310 at the second speed and with an operating displacement of 15°, the gear can be finely adjusted from seventy to eighty.

[0049] For example, a single user operation can be broken down into a pre-operation and a post-operation. Taking the speed control knob 311 as an example, when the user rotates the knob 311 30° in a single operation, the pre-operation involves rotating the knob 311 15°, and the post-operation involves rotating it another 15°. For instance, if the user wants to adjust the fan speed from level 1 to level 80, in the pre-operation, the user can adjust the fan speed from level 1 to level 70. In the pre-operation, the gear shift signal changes the gear control granularly; each 1° rotation of the speed control knob 311 results in a large adjustment of the gear. Because the user perceives this large adjustment, in the post-operation, the user can finely adjust the fan speed by changing the operating state, adjusting the fan speed from level 70 to level 80. In the post-operation, the gear shift signal changes the gear control granularly, achieving finer gear adjustment. Therefore, users can easily and accurately adjust from a smaller gear to a larger gear in a single process without having to make repeated adjustments.

[0050] In the above embodiments, the user can finely adjust the fan speed by changing the operating state in the later process. The user's operating state can be, for example, the speed of finger movement, the distance of finger movement, the speed at which the speed control component 310 moves, or the displacement of the speed control component 310 caused by the finger. The user's operating method varies depending on the type of speed control component 310. For example, when the speed control component 310 is a speed control knob 311, the user's operation includes controlling the rotation direction of the speed control knob 311, controlling the rotational angular displacement of the speed control knob 311, and controlling the rotational angular velocity of the speed control knob 311. For example, in the first process, the user rotates the speed control knob 311 15° clockwise, and the rotational speed of the speed control knob 311 is the first speed; in the later process, the user continues to rotate the speed control knob 311 15° clockwise, but the rotational speed is a second speed, which is slower than the first speed. In other words, compared to the earlier process, the user changes the operating state by altering the speed control knob 311's operating speed in the later process. Compared to conventional solutions, the design of controlling the fan speed by collecting the rotational speed of the speed control knob 311 has the advantage of approaching the target speed faster, and can continue to finely adjust until the target speed is reached while approaching it.

[0051] In one embodiment, the speed control unit 30 includes a signal acquisition unit 320, which includes a displacement acquisition unit 322 and a speed acquisition unit 321. The displacement acquisition unit 322 is used to generate a gear skipping signal, and the speed acquisition unit 321 is used to generate a gear distance signal.

[0052] Figure 3This is a schematic diagram of the fan speed control unit 30 in one embodiment of this application. (See attached diagram.) Figure 3 In one embodiment, the speed control unit 30 includes a signal acquisition unit 320, which includes a displacement acquisition unit 322 and a speed acquisition unit 321. The displacement acquisition unit 322 is used to generate a gear shift signal; the speed acquisition unit 321 is used to generate a gear position signal. Specifically, the displacement acquisition unit 322 is used to acquire the user's operating displacement on the speed control unit 30 and convert the operating displacement into a gear shift signal; the speed acquisition unit 321 is used to acquire the user's operating speed on the speed control unit 30 and convert the operating speed into a gear position signal.

[0053] The signal acquisition unit 320 is electrically connected to the control unit 20. The signal acquisition unit 320 is used to acquire the user's operation and convert it into an electrical signal that can be recognized by the control unit 20, so that the control unit 20 can recognize the user's operation and control the fan assembly 10 to perform corresponding actions.

[0054] Speed ​​acquisition unit 321 and displacement acquisition unit 322 are electrically connected to control unit 20. Speed ​​acquisition unit 321 and displacement acquisition unit 322 are used to identify user operations, analyze and process them accordingly. Displacement acquisition unit 322 generates a gear shift signal from the user's operation, and speed acquisition unit 321 generates a gear interval signal from the user's operation. The gear shift signal is used to change gears. After receiving the gear shift signal, control unit 20 processes it and transmits the processed signal to fan assembly 10, causing fan assembly 10 to change gears. For example, after processing the received gear shift signal, control unit 20 causes fan assembly 10 to change one gear per second. During the continuous operation of the gear shift signal, fan assembly 10 maintains a fixed frequency and changes a fixed gear. Speed ​​acquisition unit 321 also operates synchronously while displacement acquisition unit 322 outputs the gear shift signal. After the speed acquisition unit 321 transmits the gear shift signal to the control unit 20, the control unit 20 analyzes the gear shift signal and adjusts the gear shift change represented by the shift signal according to different gear shift signals. For example, after the shift signal is adjusted according to the gear shift signal, it is processed and transmitted to the fan assembly 10. The fan assembly 10 changes ten gears per second. During the continuous operation of the adjusted shift signal, the fan assembly 10 always maintains a fixed frequency to change a fixed gear.

[0055] Specifically, the above functions can be achieved by using a lookup table. Taking the speed control knob 311 as an example, the displacement acquisition unit 322 is used to acquire the angular displacement of the speed control knob 311 and convert the angular displacement into a gear shift signal; the speed acquisition unit 321 is used to acquire the angular velocity of the speed control knob 311 and convert the angular velocity into a gear shift signal.

[0056] In one embodiment, the displacement acquisition unit 322 may include a potentiometer or a magnetic encoder, which is connected to the speed control knob 311 to acquire the rotational angular displacement of the speed control knob 311 and output a gear shift signal. The gear shift signal can be an analog voltage of 0-5V. The speed acquisition unit 321 may include a Hall sensor, which is connected to the speed control knob 311 to acquire the rotational speed of the speed control knob 311 and output a gear distance signal, which can be an analog voltage of 0-5V. After receiving the aforementioned gear shift signal and gear distance signal, the control unit 20 performs analog-to-digital conversion, converting the analog signals into digital signals. That is, it converts the gear shift signal, represented by an analog voltage of 0-5V, into a digital signal, and also converts the gear distance signal, represented by an analog voltage of 0-5V, into a digital signal. The control unit 20 determines the gear skipping interval represented by the gear skipping signal according to the correspondence shown in Table 1 based on the signal after analog-to-digital conversion. For example, if the initial gear is 1, and the rotation speed of the speed control knob 311 represented by the gear skipping signal collected by the speed acquisition unit 321 is ω° / s, when ω is 3, the corresponding gear skipping interval number is 1 by looking up Table 1. Then the control unit 20 will control the gear skipping interval number represented by the gear skipping signal to be 1, so the actual gear of the fan assembly 10 increases from gear one to gear two. Then, when ω changes to 30, the corresponding gear skipping interval number is 50 by looking up Table 1. Then the control unit 20 will control the gear skipping interval number represented by the gear skipping signal to be 50, so the actual gear of the fan assembly 10 increases from gear two to gear fifty-two.

[0057] Table 1

[0058] 0<ω<5 1 5≤ω<6 2 6≤ω<7 3 …… …… 30≤ω<31 50 …… …… ω>50 99

[0059] In one embodiment, the displacement acquisition unit 322 is used to acquire linear displacement and convert the linear displacement into a gear shift signal; the speed acquisition unit 321 is used to acquire linear speed and convert the linear speed into a gear distance signal.

[0060] Figure 4 This is a schematic diagram of a fan with a touchscreen 313 according to one embodiment of this application. Figure 4As shown, the speed control unit 310 can also be a touch screen 313. When the user operates, they can slide their finger along a straight line on the touch screen 313, i.e., move linearly. The touch screen 313 can then collect the distance and speed of the user's slide. The speed acquisition unit 321 is electrically connected to the touch screen 313 to collect the distance and speed of the user's finger sliding on the touch screen 313. The control unit 20 determines the gear interval represented by the gear signal according to the correspondence shown in Table 2 based on the signal after analog-to-digital conversion. For example, if the initial gear is 1, and the speed of the finger sliding on the touch screen 313, as represented by the gear signal, is v mm / s, when v is 3, the corresponding gear interval number is 1 when looking up Table 2. Therefore, the control unit 20 will control the gear interval number represented by the gear signal to be 1, so the actual gear of the fan assembly 10 increases from gear one to gear two. Then, when v changes to 30, the corresponding gear interval number is 50 when looking up Table 1. Therefore, the control unit 20 will control the gear interval number represented by the gear signal to be 50, so the actual gear of the fan assembly 10 increases from gear two to gear fifty-two.

[0061] Table 2

[0062]

[0063]

[0064] In some embodiments, the speed acquisition unit 321 may include a speed sensor, which is used to acquire the speed of the user operating the speed control component 310. When the speed control component 310 is a speed control knob 311, the speed sensor acquires the angular velocity of the speed control knob 311 rotation. When the speed control component 310 is a touch screen 313, the speed sensor acquires the speed of the finger sliding on the touch screen 313.

[0065] Specifically, when the speed control component 310 is a speed control knob 311, the speed sensor may include a Hall effect sensor. When a thin metal or semiconductor sheet carrying an electric current is placed perpendicularly in a magnetic field, a potential difference is generated across the two ends of the sheet; this phenomenon is called the Hall effect. The Hall effect sensor can detect changes in the magnetic field. When a magnetic component rotates with the speed control knob 311, it causes a change in the magnetic field around the sensor. The Hall sensor converts this magnetic field change into an electrical signal, and the rotational speed can be determined by analyzing the electrical signal.

[0066] Specifically, when the speed control device 310 is a touchscreen 313, the aforementioned speed sensor can be broadly understood as indirectly measuring speed through the touchscreen 313's own sensing technology and related algorithms. For example, the touchscreen 313 typically employs capacitive sensing. The screen surface has a transparent conductive layer. When a finger touches the touchscreen 313, it changes the capacitance value at the touch point. The touchscreen 313 controller determines the touch point's position by detecting this capacitance change. By continuously and rapidly detecting changes in the touch point's position and combining this with time information, the finger's sliding speed can be calculated. For example, if the touch point moves rapidly from one position to another within a short time, the controller can determine the sliding speed based on the distance and time interval of the position change. Alternatively, optical sensing technology can be used. By arranging optical sensors around the screen, when a finger slides on the screen, it blocks or reflects light. The optical sensors determine the finger's position and movement by detecting changes in light. Similar to capacitive technology, the sliding speed is calculated by analyzing changes in the finger's position at different times. For example, utilizing the propagation of infrared light on the screen surface, when a finger blocks infrared light, the sensor detects a change in the light signal, thereby tracking the finger's movement trajectory and speed.

[0067] In some embodiments, the speed acquisition unit 321 may include a displacement sensor, which is used to acquire the displacement changes of the user operating the speed control component 310. When the speed control component 310 is a speed control knob 311, the displacement sensor acquires the rotation angle change of the speed control knob 311. When the speed control component 310 is a touch screen 313, the displacement sensor acquires the displacement change of the finger sliding on the touch screen 313.

[0068] Specifically, when the speed control operation 310 is a speed control knob 311, the displacement sensor may include a potentiometer, which is an adjustable electronic component consisting of a resistive element and a rotating or sliding system. When the speed control knob 311 rotates, it causes the sliding contact of the potentiometer to move on the resistive element, thereby changing the resistance value. By measuring the change in resistance value, the angular displacement of the speed control knob 311 can be determined. Alternatively, the displacement sensor may also include a rotary variable differential transformer, based on the principle of electromagnetic induction, consisting of a primary coil, two secondary coils, and a rotatable iron core. When the speed control knob 311 rotates the iron core, it changes the coupling degree between the primary and secondary coils, thereby generating different induced electromotive forces in the secondary coils. By measuring the difference in the induced electromotive forces of the two secondary coils, the electrical signal related to the angular displacement of the speed control knob 311 can be obtained.

[0069] Specifically, when the speed control unit 310 is a touchscreen 313, the aforementioned displacement sensor can be interpreted in a broader sense, specifically measuring displacement indirectly through the touchscreen 313's own sensing technology and related algorithms. For example, a capacitive touchscreen 313 has a transparent conductive layer coated on its glass surface. When a finger touches the touchscreen 313, the finger and the conductive layer form a capacitor, generating a coupling capacitance effect. The touchscreen 313 controller determines the position of the touch point by detecting changes in capacitance. By continuously tracking the position changes of the touch point at different times, the distance between adjacent positions is calculated, and thus the total distance of the finger's movement is accumulated.

[0070] In the above embodiments, the operation of increasing or decreasing the fan speed is not limited. The control unit 20 can be set to a default state, whereby the speed control unit 30 increases or decreases the fan speed by default when it detects the user's operation. This application also provides an embodiment that can determine the user's need to increase or decrease the fan speed based on the user's operation.

[0071] Specifically, in one embodiment, the speed control unit 30 includes a direction acquisition unit 323, which is used to generate an upshift signal and a downshift signal; the control unit 20 is configured to output an acceleration signal in response to the upshift signal, the skip signal, and the gear distance signal, and the fan assembly 10 is used to increase the speed in response to the acceleration signal; the control unit 20 is configured to output a deceleration signal in response to the downshift signal, the skip signal, and the gear distance signal, and the fan assembly 10 is used to decrease the speed in response to the deceleration signal.

[0072] Among them, see Figure 3 The signal acquisition unit 320 includes a speed acquisition unit 321, a displacement acquisition unit 322, and a direction acquisition unit 323. These three acquisition units are electrically connected to the control unit 20, enabling the control unit 20 to receive user operation signals acquired by these three units. Specifically, the direction acquisition unit 323 generates upshift and downshift signals based on the user's actions. Depending on the different speed control components 310, the user's operation method or actions will vary.

[0073] For example, when the speed control component 310 is Figure 2When the user rotates the speed control knob 311, it can be clockwise or counterclockwise. The speed control unit 310 can then generate upshift and downshift signals based on these different rotations. For example, when the user rotates the speed control knob 311 clockwise, the direction acquisition unit 323 generates an upshift signal; when the user rotates it counterclockwise, the direction acquisition unit 323 generates a downshift signal. Alternatively, the configuration can be reversed: when the user rotates the speed control knob 311 clockwise, the direction acquisition unit 323 generates a downshift signal; and when the user rotates it counterclockwise, the direction acquisition unit 323 generates an upshift signal.

[0074] When the speed regulating control component 310 is Figure 2 When the speed control knob 311 is shown, the direction acquisition unit 323 may include a potentiometer, which is a device that changes its resistance value by rotation. Connecting the potentiometer to the speed control knob 311, the resistance value of the potentiometer changes accordingly when the speed control knob 311 is rotated. The rotation direction and angle of the speed control knob 311 can be determined by measuring the change in the potentiometer's resistance value. For example, rotating the speed control knob 311 clockwise increases the potentiometer's resistance value; rotating it counterclockwise decreases the resistance value. An analog-to-digital converter circuit converts the analog resistance value of the potentiometer into a digital signal. The control unit 20 may include a microcontroller, which can then determine the rotation direction based on the change in the digital signal.

[0075] When the speed regulating control component 310 is Figure 2 When the speed control knob 311 is shown, the direction acquisition unit 323 may include a Hall effect sensor, which can detect changes in the magnetic field. A permanent magnet is mounted on the rotation axis of the speed control knob 311. When the speed control knob 311 rotates, the magnetic field generated by the permanent magnet changes. The Hall effect sensor can sense this change in the magnetic field and convert it into an electrical signal. By analyzing the electrical signal, the rotation direction of the speed control knob 311 can be determined. For example, when the N pole of the permanent magnet is close to the Hall sensor, a high-level signal is output; when the S pole is close, a low-level signal is output. Based on the change pattern of the level signal, the rotation direction of the speed control knob 311 can be determined. The Hall effect sensor has advantages such as non-contact measurement, fast response speed, and strong anti-interference ability.

[0076] For example, when the speed control component 310 is Figure 4When the touchscreen 313 is shown, the user can slide the touchscreen 313 in a specific gesture according to preset rules to cause the orientation acquisition unit 323 to generate an increment signal and a decrement signal respectively. For example, the preset rule is that when the orientation acquisition unit 323 detects the user's finger sliding upward along the touchscreen 313, the orientation acquisition unit 323 generates an increment signal; when the orientation acquisition unit 323 detects the user's finger sliding downward along the touchscreen 313, the orientation acquisition unit 323 generates a decrement signal. Of course, other touch operations can also be preset.

[0077] When the speed regulating control component 310 is Figure 4 When the touchscreen 313 is shown, the orientation acquisition unit 323 may include a capacitive touchscreen 313 controller chip. The capacitive touchscreen 313 operates based on the capacitance characteristics of the human body. When a finger touches the touchscreen 313, the capacitance value at the touch point changes. The controller chip continuously scans the capacitance changes on the screen to determine the touch position and action. For example, a Cypress TMA series capacitive touchscreen 313 controller chip can be used.

[0078] When the speed regulating control component 310 is Figure 4 When the touchscreen 313 is shown, the orientation acquisition unit 323 may include a resistive touchscreen 313 controller chip. The resistive touchscreen 313 consists of two conductive layers with a tiny gap in between. When a finger presses the screen, the two conductive layers come into contact, thereby changing the resistance value. The controller chip determines the touch position by measuring the change in resistance value. For example, a resistive touchscreen 313 controller chip from Seiko Epson can be used.

[0079] When the speed regulating control component 310 is Figure 4 When the touchscreen 313 is shown, the orientation acquisition unit 323 may include an optical touchscreen 313 sensor. The optical touchscreen 313 uses infrared light or a camera to detect touch actions. Infrared emitters and receivers are arranged at the edge of the screen. When a finger touches the touchscreen 313, it blocks some light, and the intensity of the light received by the receiver changes, thereby determining the touch position.

[0080] Figure 5 This is a schematic diagram of a fan with a touch element 314 in one embodiment. Figure 6 This is a schematic diagram of the circuit principle of the touch device 314.

[0081] Speed ​​control unit 310 includes a touch element 314, which includes multiple contacts, for example, in Figure 6In this embodiment, the touch device 314 includes six contacts: K2, K3, K4, K5, K6, and K7. Each contact can detect the user's finger touch action. Different contacts can work together to detect sliding parameters such as finger movement, sliding distance, sliding speed, number of slides, and sliding time. The direction acquisition unit 323 may include a chip U1. Pins 1, 2, 3, 4, 5, and 6 of the chip U1 are connected to contacts K2, K3, K4, K5, K6, and K7 of the touch device 314, respectively. In one embodiment, when the user slides their finger from bottom to top, the lower pin detects the user's finger touch operation before the upper pin, thereby generating an increment signal through the chip U1; when the user slides their finger from top to bottom, the upper pin detects the user's finger touch operation before the lower pin, thereby generating a decrement signal through the chip U1. In another embodiment, when the user slides their finger from bottom to top, the lower pin detects the user's finger touch operation before the upper pin, thereby generating a downshift signal through chip U1; when the user slides their finger from top to bottom, the upper pin detects the user's finger touch operation before the lower pin, thereby generating an upshift signal through chip U1.

[0082] The control unit 20 is connected to the direction acquisition unit 323 and is used to receive upshift and downshift signals. In addition, the control unit 20 is also connected to the speed acquisition unit 321 and the displacement acquisition unit 322, and is used to receive gear skipping signals and gear distance signals. The control unit 20 performs logical operations and processing based on these signals, and finally outputs an acceleration or deceleration signal. The control unit 20 can be implemented using a microprocessor (such as a microcontroller) or a programmable logic controller (PLC), possessing powerful signal processing and control capabilities.

[0083] For example, when the control unit 20 receives the upshift signal, skip-shift signal, and gear distance signal generated by the speed control unit 30, the control unit 20 determines the current gear change requirement based on these signals, and determines the number of gears that need to be changed, as indicated by the skip-shift signal, by combining the gear distance signal. Then, it performs signal conversion to generate an increase signal. Specifically, the control unit 20 uses an internal control algorithm (such as a PID algorithm or PWM speed control technology) to convert the number of gears that need to be changed, as indicated by the skip-shift signal, into a specific speed control signal. The speed control signal includes an increase signal for increasing the fan speed and a decrease signal for decreasing the fan speed. For example, the control unit 20 may increase the fan speed by adjusting the duty cycle of the PWM signal. The control unit 20 outputs the generated increase signal (such as a PWM signal) to the fan assembly 10. The fan assembly 10 may include a motor and a motor drive chip electrically connected to the motor. The motor drive chip receives the signal from the control unit 20 and converts it into a signal to control the motor rotation. The fan assembly 10 adjusts the motor speed according to the signal; that is, the fan assembly 10 increases its speed in response to the increase signal. Similarly, when the control unit 20 receives the downshift signal, skip-shift signal, and gear distance signal generated by the speed control unit 30, it generates a speed reduction signal based on the above method. The control unit 20 outputs the generated speed reduction signal (such as a PWM signal) to the fan assembly 10. The fan assembly 10 adjusts the motor speed according to the signal, that is, the fan assembly 10 reduces its speed in response to the speed reduction signal. It should be noted that PWM signal is a commonly used control method that adjusts the motor speed by changing the duty cycle of the signal (i.e., the ratio of the high-level time to the period).

[0084] The control unit 20 controls the rotational speed of the fan assembly 10 by outputting an acceleration signal or a deceleration signal. The fan assembly 10 may include a motor and a motor control chip for controlling the motor's rotation. In one embodiment, the motor control chip may employ pulse width modulation (PWM) technology, and the acceleration signal or deceleration signal may be a corresponding PWM control signal. The control unit 20 pre-stores a table showing the duty cycles of the PWM signals corresponding to each speed setting. For example, if the fan assembly is configured to have one hundred adjustable speed settings, the control unit 20 pre-stores the duty cycles of the PWM signals corresponding to these one hundred speed settings. When the control unit 20 determines the number of speed settings that need to be changed, as indicated by the speed change signal, it looks up the duty cycle of the PWM signal corresponding to the changed speed in the table and generates a speed control signal (acceleration signal or deceleration signal) representing the duty cycle of that PWM signal. Therefore, the duty cycle of the PWM signal corresponding to the speed-up or speed-down signal is calculated by the control unit 20. The higher the duty cycle, the higher the motor speed of the fan assembly 10; the lower the duty cycle, the lower the motor speed of the fan assembly 10. The control unit 20 sends the generated PWM signal (speed-up or speed-down signal) to the motor control chip of the fan assembly 10, and the motor control chip makes the motor rotate at a specific speed. By adjusting the duty cycle of the PWM signal, precise control of the motor speed is achieved, thereby adjusting the fan speed. By combining the upshift signal, downshift signal, skip-shift signal, and gear interval signal, precise control of the fan speed can be achieved, meeting the precise requirements for air volume and speed in different application scenarios. Users can flexibly change the speed regulation mode and amplitude of the fan according to actual needs by adjusting the skip-shift signal and gear interval signal, improving the adaptability and flexibility of the system.

[0085] One embodiment of this application provides a fan, including a fan assembly 10 and a speed control unit 30. The fan assembly 10 is configured to have Y speed settings, each of which has a corresponding operating speed. The speed control unit 30 includes a speed control operation component 310, which is capable of changing the speed settings of the fan assembly 10 multiple times in response to a single user operation, with a total displacement of 2X in a single operation. The fan assembly 10 is capable of changing speed settings in response to the user's operation displacement and operation speed detected by the speed control operation component 310. When the operation speed is a first speed and the operation displacement is X, the fan assembly 10 changes M speed settings. When the operation speed is a second speed less than the first speed and the operation displacement is X, the fan assembly 10 changes N speed settings, where X>0, Y>M>N≥1.

[0086] Specifically, the fan includes a fan assembly 10 and a speed control unit 30. The speed control unit 30 is connected to the fan assembly 10 and is used to control the rotational speed of the fan assembly 10. User operations on the fan are directly captured by the speed control unit 30, which then converts the user's actions into electrical signals that control the rotational speed of the fan assembly 10. The fan assembly 10 is configured to have multiple speed settings, for example, one hundred. Each of the one hundred speed settings has a corresponding operating speed. At the first speed setting, the fan assembly 10 has the lowest rotational speed, and at the one hundredth speed setting, the fan assembly 10 has the highest rotational speed. The rotational speed of the fan assembly 10 gradually increases from the first to the one hundredth speed settings. After capturing the user's actions, the speed control unit 30 converts them into electrical signals that allow the fan assembly 10 to operate at any of these one hundred speed settings. In particular, the speed control unit 30 includes a speed control operating component 310, which may include, for example... Figure 2 The speed control knob 311 shown may also include a sliding touch element 312, which may include... Figure 4 The touchscreen 313 shown may also include Figure 5 The touch element 314 is shown. The speed control element 310 can change the speed of the fan assembly more than 10 times in response to a single operation by the user.

[0087] In one embodiment, the speed control unit 30 includes a speed control knob 311, which can be continuously rotated in response to user operation and can change gears multiple times during a single rotation. The fan assembly 10 can change its rotational speed in response to the rotation angle and rotational speed of the speed control knob 311. When the speed control knob 311 is rotated by an angle X at a first speed, the fan assembly 10 changes gears Y times consecutively, where X>0° and Y>1 times, and the fan assembly 10 changes gears M times each time. When the speed control knob 311 is rotated by an angle X at a second speed less than the first speed, the fan assembly 10 changes gears Y times consecutively, where X>0° and Y>1 times, and the fan assembly 10 changes gears N times each time, where Y>M>N. In this embodiment, the total rotation angle of the speed control knob 311 in a single operation by the user is 2X angles. During the initial rotation angle X of the speed control knob 311, the fan assembly 10 continuously changes gears multiple times. For example, the fan assembly 10 can continuously change gears 10 times. During the subsequent rotation angle X of the speed control knob 311, the fan assembly 10 also continuously changes gears 10 times. Through multiple gear changes, it is beneficial to give the user sufficient time and sample size to perceive the correspondence between the operating speed and gear changes, thereby improving the user's operating experience.

[0088] Among them, such as Figure 2As shown, a single user operation can be either rotating the speed control knob 311 from bottom to top or from top to bottom. During the rotation of the speed control knob 311, the fan assembly 10 changes gears multiple times. Taking the user rotating the speed control knob 311 from bottom to top as an example, it can change from gear one to gear two, and then from gear two to gear three. During the gear change process, the user only performs one rotation action, but this action is continuous; that is, the user continuously rotates the speed control knob 311 during the gear change process. The fan assembly 10 responds to the user's actions in real time to change gears, and when the user stops, the fan assembly 10 will operate at the last changed gear.

[0089] This implementation has the following advantages: the speed control unit 30's speed control operation component 310 can respond to a single user operation to change the fan assembly's speed more than 10 times, allowing the user to achieve a wide range of speed switching without cumbersome multiple operations. For example, when quickly adjusting the fan speed, a single operation can span multiple speeds, greatly saving adjustment time and improving the user's ease of operation when using the fan.

[0090] like Figure 4 and Figure 5 As shown, a single user operation can be either a swipe of the user's finger from bottom to top on the touchscreen 313 or touchpad 314, or a swipe from top to bottom on the touchscreen 313 or touchpad 314. During the movement of the user's finger, the fan assembly 10 changes its speed multiple times. For example, when the user swipes from top to bottom on the touchscreen 313 or touchpad 314, the speed can change from 100 to 99, then from 99 to 90 in increments of one, and then from 90 to 80 in increments of one. During the speed changes, the user only performs one continuous swipe in the same direction. The fan assembly 10 responds to the user's actions in real time, changing its speed. When the user stops moving, the fan assembly 10 will operate at the last changed speed.

[0091] The fan assembly 10 changes its speed in response to a user's operation detected by the speed control unit 310. The user's operation may include displacement and speed. Figure 2 As shown, when the speed control operation component 310 is the speed control knob 311, the operating displacement is the angle of rotation of the speed control knob 311, and the operating speed is the angular velocity of rotation of the speed control knob 311. Figure 4 and Figure 5 As shown, when the speed control device 310 is a touch screen 313 or a touch device 314, the operation displacement is the length of the user's finger movement trajectory, and the operation speed is the user's finger movement speed.

[0092] In one embodiment, when the operating speed is a first speed and the operating displacement is X, the fan assembly 10 changes M gears; when the operating speed is a second speed less than the first speed and the operating displacement is X, the fan assembly 10 changes N gears, where X>0, Y>M>N.

[0093] Suppose the user's target operation is to shift from gear 1 to gear 45. Since the user cannot precisely perceive the speed required to shift to gear 45, they need to first attempt to move a certain distance at a relatively fast speed to approach the target gear. Then, by perceiving the approximate relationship between the operation speed and the gear change process in the initial process, they can then reduce the operation speed in the subsequent process, using the previously perceived correspondence to continue the subsequent operation at a slower second speed until the target gear is reached.

[0094] For example, such as Figure 2 As shown, in a single action of the user rotating the speed control knob 311 from bottom to top, from an ergonomic perspective, assuming the user can rotate a maximum angle of 180° with the most comfortable operating action, this 180° is broken down into an initial 90° and a subsequent 90°. It should be understood that the process of rotating the speed control knob 311 from the initial 90° to the subsequent 90° is continuous. During the initial 90° rotation, the user operates at a relatively fast initial speed, at which point the fan assembly 10 adjusts from gear one to gear thirty. By perceiving the approximate relationship between the operating speed and the gear change process in the initial phase, the user completes the subsequent 90° operation at a slower second speed than the initial speed, until the fan assembly 10 reaches gear forty-five. It should be understood that if the fan assembly 10 reaches the target gear in advance during the process of completing the subsequent 90°, the subsequent process can be ended in advance. For example, if the user has already adjusted the fan assembly 10 to gear 45 when the speed control knob 311 has been rotated 75° during the subsequent adjustment process, then the user can stop rotating the speed control knob 311 in advance.

[0095] For example, such as Figure 4 and Figure 5As shown, in a single action of the user sliding their finger from bottom to top, the change in the speed of the fan assembly 10 depends on the maximum length of the finger movement that the touchscreen 313 or touch device 314 can recognize. For example, if the maximum length of the finger movement that the touchscreen 313 or touch device 314 can recognize is 2X, the sliding process of the user's finger can be decomposed into a first recognizable length X and a second recognizable length X. During the process of the user sliding their finger along the first recognizable length X, the user moves at a relatively fast first speed, at which point the fan assembly 10 adjusts from speed one to speed thirty. By perceiving the approximate relationship between the operation speed and the speed change process in the first process, in subsequent operations, the user completes the subsequent displacement process of length X at a slower second speed than the first speed, until the fan assembly 10 reaches speed forty-five. It should be understood that if the fan assembly 10 reaches the target gear in advance during the subsequent movement of X length, the subsequent process can end in advance. For example, if the user slides their finger X / 3 distance during the subsequent adjustment process, and the fan assembly 10 has already been adjusted to gear 45, then the operation can be stopped in advance.

[0096] By employing the above-described implementation method, during gear adjustment, the system can first tentatively approach the target gear at a relatively fast speed, and then adjust subsequent gears at a slower speed, achieving both quick and accurate adjustment to the target gear. This implementation method establishes a relationship between three variables: operational displacement, operational speed, and target gear. Specifically, it divides the operational displacement into a prior operational process that senses the relationship between operational speed and gear changes, and a subsequent operational process that finely adjusts to the target gear based on the sensed correspondence between operational speed and gear changes. This achieves the goal of quick and accurate adjustment to the target gear. By varying the number of gear changes at different operational speeds, this fan provides users with diverse adjustment methods. It allows for rapid and significant adjustments when quickly changing environmental conditions is needed, as well as fine adjustments when demanding wind speed requirements and prioritizing comfort. It adapts to the diverse needs of different users in different scenarios, greatly improving the fan's applicability and user satisfaction. The speed control component 310 can respond to multiple gear changes in a single user operation. Users can clearly perceive the granularity of gear changes during each operation. The granularity of gear changes refers to the difference between the initial and subsequent gear changes during the user's operation. More gear changes result in greater granularity, and fewer changes result in less granularity. Granularity is related to operating speed; if the initial gear change is perceived to be too fast or too slow, the subsequent gear change is adjusted promptly, achieving fast and precise control.

[0097] In one embodiment, when the displacement of the speed control component 310 operated by the user in a single operation is 2X, and the operating speed is the first speed and the operating displacement is X, the fan assembly 10 changes gears Y times continuously, and the fan assembly 10 changes gears M times each time; when the operating speed is the second speed which is less than the first speed and the operating displacement is X, the fan assembly 10 changes gears Y times continuously, and the fan assembly 10 changes gears N times each time, where Y>M>N≥1.

[0098] For example, if a user's single operation of the speed control component 310 involves a displacement of 2X, the user's operation process can be divided into two consecutive operations: a first displacement X and a second displacement X. During the first displacement operation, the user operates the speed control component 310 at the first speed, with a displacement of X. The fan assembly 10 changes gears 10 times consecutively, with each change involving 5 gears, for a total of 50 gear changes. During the second displacement operation, the user operates the speed control component 310 at a second speed (less than the first speed), with a displacement of X. The fan assembly 10 changes gears 10 times consecutively, with each change involving 2 gears, for a total of 20 gear changes. In other words, for the same displacement, the first operation involves a larger number of gear changes, while the second operation involves a smaller number of gear changes. Therefore, in the second operation, a unit distance of displacement corresponds to a smaller gear change, enabling more precise gear control. The earlier operation process allows for faster gear changes.

[0099] In one embodiment, the speed control unit 30 includes a sliding touch element 312, which is capable of changing the speed multiple times in response to a single sliding operation by the user; the fan assembly 10 is capable of changing its rotational speed in response to the sliding distance and sliding speed detected by the sliding touch element 312; when the sliding touch element 312 detects that the user slides a distance X at a first speed, the fan assembly 10 changes the speed Y times consecutively, where X>0mm and Y>1 times, and the fan assembly 10 changes M speeds each time; when the sliding touch element 312 detects that the user slides a distance X at a second speed greater than the first speed, the fan assembly 10 changes the speed Y times consecutively, where X>0mm and Y>1 times, and the fan assembly 10 changes N speeds each time, where Y>M>N.

[0100] For example, see Figure 4 and Figure 5 The sliding touch element 312 can be Figure 4 The touchscreen 313 shown can also be Figure 5The touch element 314 is shown. In this embodiment, the distance of a user's single finger swipe is 2X. During the initial swipe distance X, the fan assembly 10 continuously changes its speed multiple times. For example, the fan assembly 10 can continuously change its speed 10 times. During the subsequent swipe distance X, the fan assembly 10 also continuously changes its speed 10 times. Through multiple speed changes, the user is given sufficient time and a large number of samples to perceive the relationship between the operation speed and the speed change, thereby improving the user's operating experience.

[0101] In one embodiment, the speed control unit 30 includes a signal acquisition unit 320, which includes a displacement acquisition unit 322 and a speed acquisition unit 321. The displacement acquisition unit 322 is used to convert the rotational angular displacement of the speed control knob 311 into a gear shift signal; the speed acquisition unit 321 is used to convert the rotational speed of the speed control knob 311 into a gear distance signal; the fan assembly 10 can change its rotational speed in response to the gear shift signal and the gear distance signal. The speed control unit 30 includes a rotating component 330, an electroluminescent component 340, and a photoelectric conversion component 350. At least the rotating component 330, the electroluminescent component 340, and the photoelectric conversion component 350 together constitute the speed acquisition unit 321 and the displacement acquisition unit 322. The rotating component 330 is coaxially mounted with the speed control knob 311 and can rotate synchronously with the speed control knob 311; the electroluminescent component 340 and the photoelectric conversion component 350 are configured to generate the gear shift signal and the gear distance signal based on the rotational action of the rotating component 330.

[0102] Specifically, such as Figure 2 and Figure 3 As shown, the speed control unit 30 includes a speed control knob 311 and a signal acquisition unit 320. The signal acquisition unit 320 is connected to the speed control knob 311. The user controls the fan speed through the speed control knob 311, and the user's operation of the speed control knob 311 is manifested by rotating the speed control knob 311. The signal acquisition unit 320 is used to collect the user's operation mode of the speed control knob 311 and convert the operation mode into an electrical signal. Different operation modes of the user's operation mode of the speed control knob 311, such as changes in the angular displacement and angular velocity of the speed control knob 311, will generate different electrical signals. For example, the angular displacement of the speed control knob 311 can be converted into a speed-jumping signal by the signal acquisition unit 320. The speed-jumping signal is used to control the fan speed change, such as changing the fan from speed one to speed three, changing the fan by one speed at a time, or changing the fan by two speeds at a time. For example, the angular velocity of the speed control knob 311 (i.e., the rotation speed of the speed control knob 311) can be converted into a gear signal by the signal acquisition unit 320. The gear signal is used to control the degree of gear change of the shift signal each time.

[0103] Specifically, the signal acquisition unit 320 may further include a displacement acquisition unit 322 and a speed acquisition unit 321. The displacement acquisition unit 322 is connected to the speed control knob 311 and the fan assembly 10, and converts the rotational angular displacement of the speed control knob 311 into a gear shift signal. The speed acquisition unit 321 is connected to the speed control knob 311 and the fan assembly 10, and converts the rotational speed of the speed control knob 311 into a gear interval signal. The fan assembly 10 can change its gear or speed in response to the gear shift signal and the gear interval signal. It can be understood that each gear of the fan corresponds to a preset speed, and the change of gear by the fan assembly 10 ultimately manifests as a change in speed.

[0104] Figure 7 For the purposes of this application Figure 2 A schematic diagram of the speed control unit 30 in the illustrated embodiment. (See also...) Figure 2 and Figure 7 The speed control unit 30 includes a speed control operating component 310, which serves as a speed control knob 311. The speed control operating component 310 includes a rotating component 330, which is a thin-plate-shaped disc. The central axis L of the disc is the rotation axis, and the rotating component 330 can rotate around the rotation axis L under the user's operation. The angular displacement of the rotating component 330 rotating around the rotation axis L can be acquired by the displacement acquisition unit 322 and converted into a gear shift signal. The angular velocity of the rotating component 330 rotating around the rotation axis L can be acquired by the speed acquisition unit 321 and converted into a gear distance signal.

[0105] For example, the speed acquisition unit 321 includes an electroluminescent element 340 and a photoelectric conversion element 350. The electroluminescent element 340 generates a light signal, and the photoelectric conversion element 350 receives the light signal generated by the electroluminescent element 340. The light signal generated by the electroluminescent element 340 illuminates the rotating element 330. The rotating element 330, through its specific structure, can cause the light signal to change according to a certain pattern, thereby enabling the photoelectric conversion element 350 to receive the light signal that changes according to a certain pattern and convert the light signal into an electrical signal representing the gear distance signal.

[0106] For example, the displacement acquisition unit 322 also includes an electroluminescent element 340 and a photoelectric conversion element 350. The displacement acquisition unit 322 can share an electroluminescent element 340 with the velocity acquisition unit 321, or they can each have their own electroluminescent element 340. Similarly, the displacement acquisition unit 322 can share a photoelectric conversion element 350 with the velocity acquisition unit 321, or they can each have their own photoelectric conversion element 350. The following explanation uses the example of the displacement acquisition unit 322 and the velocity acquisition unit 321 sharing an electroluminescent element 340 and a photoelectric conversion element 350. The electroluminescent element 340 generates a light signal, and the photoelectric conversion element 350 receives the light signal generated by the electroluminescent element 340. The light signal generated by the electroluminescent element 340 illuminates the rotating member 330. The rotating member 330, through its specific structure, can cause the light signal to change according to a certain pattern, thereby allowing the photoelectric conversion element 350 to receive the light signal that changes according to a certain pattern and convert this light signal into an electrical signal representing a shift signal. For example... Figure 7 As shown, the surface of the rotating component 330 includes a first surface 331 and a second surface 332 arranged opposite to each other along the rotation axis L, and also includes a side surface 333 connecting the first surface 331 and the second surface 332. The electroluminescent component 340 emits light signals toward the surface of the rotating component 330. The surface of the rotating component 330, through a specific structure, reflects, refracts, blocks, or allows the light signals to pass through. Combined with the rotational motion of the rotating component 330 itself, the photoelectric conversion component 350 receives light signals that change in a certain regular pattern.

[0107] In one embodiment, the rotating member 330 is provided with a plurality of light-transmitting areas 334 and light-shielding areas 335 sequentially around the rotation axis. The light-transmitting areas 334 are used to enable the photoelectric conversion member 350 to receive the light signal emitted by the electroluminescent member 340, and the light-shielding areas 335 are used to block the photoelectric conversion member 350 from receiving the light signal emitted by the electroluminescent member 340. The rotating member 330 rotates so that the photoelectric conversion member 350 receives the light signal at intervals and generates a skip signal and a gap signal.

[0108] Figure 8 for Figure 7 The front view of the rotating component 330 shown is provided in the reference document. Figure 7 and Figure 8Multiple sets of light-transmitting areas 334 and light-blocking areas 335 are sequentially arranged around the rotation axis L on the rotating component 330. An electroluminescent element 340 and a photoelectric conversion element 350 are respectively disposed on both sides of the rotating component 330 along the rotation axis. When the rotating component 330 rotates, the light-transmitting area 334 or the light-blocking area 335 moves between the electroluminescent element 340 and the photoelectric conversion element 350. When the light-transmitting area 334 is located between the electroluminescent element 340 and the photoelectric conversion element 350, the light signal emitted by the electroluminescent element 340 can be received by the photoelectric conversion element 350. When the light-blocking area 335 is located between the electroluminescent element 340 and the photoelectric conversion element 350, the light signal emitted by the electroluminescent element 340 is blocked, preventing the photoelectric conversion element 350 from receiving the light signal.

[0109] like Figure 8 As shown, ten light-transmitting areas 334 are evenly arranged around the rotation axis L on the rotating component 330. These ten light-transmitting areas 334 are spaced equally apart, and a light-blocking area 335 is located between two adjacent light-transmitting areas 334. Each light-transmitting area 334 and its adjacent light-blocking area 335 on its clockwise side form a group. These ten groups evenly divide the entire 360° circumferential area, so each group occupies a circumferential angle of 36°. Furthermore, the light-transmitting area 334 and the light-blocking area 335 within each group occupy the same angle, 18°.

[0110] The rotational angular displacement of the rotating component 330 can be determined in the following way to generate a corresponding gear shift signal. During the duration of receiving the gear shift signal, the fan assembly 10 continuously changes gears at a preset frequency. For example... Figure 7 As shown, the positions of the electroluminescent element 340 and the photoelectric converter 350 remain unchanged. The electroluminescent element 340 emits a light signal towards the first surface 331 of the rotating element 330. When the first light-transmitting area 334A is located between the electroluminescent element 340 and the photoelectric converter 350, the photoelectric converter 350 can receive the light signal. Assuming the rotating element 330 rotates counterclockwise, so that the first light-blocking area 335A is located between the electroluminescent element 340 and the photoelectric converter 350, the photoelectric converter 350 cannot receive the light signal. Continuing to rotate the rotating element 330 counterclockwise, when the second light-transmitting area 334B is located between the electroluminescent element 340 and the photoelectric converter 350, the photoelectric converter 350 can receive the light signal. The number 1 indicates that the photoelectric converter 350 has received a light signal, and the number 0 indicates that the photoelectric converter 350 has not received a light signal. In the above process, the light signal received by the photoelectric converter 350 is 101 per unit time, that is, the photoelectric converter 350 has received a light signal at intervals, for example, 1ms, thereby generating a skip signal.

[0111] The rotational speed (i.e., angular velocity) of the rotating component 330 can be determined in the following way to generate a corresponding gear shift signal. This gear shift signal controls the number of gears changed each time the gear shift signal is executed, during the duration of the shift signal. For example... Figure 7 As shown, the positions of the electroluminescent element 340 and the photoelectric converter 350 remain unchanged. The electroluminescent element 340 emits a light signal towards the first surface 331 of the rotating element 330. When the first light-transmitting area 334A is located between the electroluminescent element 340 and the photoelectric converter 350, the photoelectric converter 350 can receive the light signal. Assuming the rotating element 330 rotates counterclockwise, so that the first light-blocking area 335A is located between the electroluminescent element 340 and the photoelectric converter 350, the photoelectric converter 350 cannot receive a light signal, and timing begins from the moment the photoelectric converter 350 no longer receives a light signal. Continuing to rotate the rotating element 330 counterclockwise, when the second light-transmitting area 334B is located between the electroluminescent element 340 and the photoelectric converter 350, the photoelectric converter 350 can receive a light signal, and timing stops from the moment the photoelectric converter 350 receives a light signal again. During the timing process, the rotating component 330 rotates by an angle of 18° in the first light-blocking area 335A. Therefore, the rotational speed (i.e., angular velocity) of the rotating component 330 can be calculated.

[0112] Understandably, users' needs for fan speed control also include increasing and decreasing the speed. In some embodiments, an operating element can be set to increase the speed in a certain way, and after the speed is increased to the maximum speed, it will jump to the minimum speed, and then continue to increase the speed in the same way. Therefore, such an implementation is not flexible enough in terms of speed control.

[0113] To this end, a more flexible gear control method can be provided in the following ways. For example, the speed control knob 311 can rotate forward and reverse, the fan assembly 10 can increase the gear in response to the forward rotation of the speed control knob 311, and the fan assembly 10 can decrease the gear in response to the reverse rotation of the speed control knob 311.

[0114] Specifically, such as Figure 2 and Figure 7 As shown, the speed control knob 311 can rotate forward and reverse. When the speed control knob 311 rotates forward, the fan assembly 10 increases the gear in response to the aforementioned gear shift signal and gear distance signal. When the speed control knob 311 rotates in reverse, the fan assembly 10 decreases the gear in response to the aforementioned gear shift signal and gear distance signal. In other words, the gear shift signal and gear distance signal do not indicate the direction of gear change, but rather the direction of gear change is determined by the rotation direction of the speed control knob 311.

[0115] For example, the speed control unit 30 can generate forward and reverse signals according to different rotation directions of the rotating component 330. In one embodiment, the forward signal is set as an increase signal and the reverse signal is set as a decrease signal. The fan assembly 10 can increase the gear in response to the forward signal (increase signal) and decrease the gear in response to the reverse signal (decrease signal).

[0116] Specifically, the speed control unit 30 can generate forward and reverse rotation signals according to the different rotation directions of the rotating component 330. When the rotating component 330 rotates forward, the speed control unit 30 generates a forward rotation signal; when the rotating component 330 rotates in reverse, the speed control unit 30 generates a reverse rotation signal. The fan assembly 10 increases the gear in response to the forward rotation signal and decreases the gear in response to the reverse rotation signal. It can be understood that before responding to the gear shift signal and the gear interval signal, the fan needs to determine whether to increase or decrease the gear based on the forward and reverse rotation signals.

[0117] In one embodiment, forward and reverse rotation signals can be generated as follows: The electroluminescent element 340 includes a first light-emitting diode 341 and a second light-emitting diode 342. The photoelectric conversion element 350 includes a first photosensitive element 351 and a second photosensitive element 352. The first photosensitive element 351 receives the light signal emitted by the first light-emitting diode 341 to generate a first rotation signal. The second photosensitive element 352 receives the light signal emitted by the second light-emitting diode 342 to generate a second rotation signal. In the direction of rotation of the rotating element 330, the first light-emitting diode 341 is located upstream of the second light-emitting diode 342. When the rotating element 330 rotates forward and reverse, the second rotation signal has a different phase difference relative to the first rotation signal. These different phase differences constitute the forward and reverse rotation signals; that is, the first and second rotation signals together constitute the forward and reverse rotation signals. The phase difference between the rising edges of the first and second rotation signals that together constitute the forward rotation signal is different from the phase difference between the rising edges of the first and second rotation signals that together constitute the reverse rotation signal.

[0118] Specifically, the layout of the electroluminescent element 340 and the photoelectric conversion element 350 in one embodiment will be described first. (See attached image) Figure 7In the electroluminescent element 340, the first light-emitting diode 341 and the second light-emitting diode 342 are arranged adjacently and both are located on the same side of the rotating element 330 along the rotation axis L. Similarly, in the photoelectric conversion element 350, the first photosensitive element 351 and the second photosensitive element 352 are arranged adjacently and also on the same side of the rotating element 330 along the rotation axis L. The rotating element 330 is located between the first light-emitting diode 341 and the first photosensitive element 351. The first photosensitive element 351 receives the light signal emitted by the first light-emitting diode 341. By rotating around the rotation axis, the rotating element 330 allows the light-transmitting area 334 and the light-blocking area 335 to move sequentially between the first light-emitting diode 341 and the first photosensitive element 351, so that the first photosensitive element 351 alternately receives the light signal. Similarly, the rotating member 330 is located between the second light-emitting diode 342 and the second photosensitive element 352. The second photosensitive element 352 is used to receive the light signal emitted by the second light-emitting diode 342. By rotating around the rotating axis, the rotating member 330 can make the light-transmitting area 334 and the light-blocking area 335 move sequentially between the second light-emitting diode 342 and the second photosensitive element 352, so that the second photosensitive element 352 receives the light signal alternately.

[0119] Furthermore, the first light-emitting diode 341 and the second light-emitting diode 342 are arranged circumferentially along the rotating member 330. The first light-emitting diode 341 and the second light-emitting diode 342 are disposed in the same plane, which is parallel to the plane containing the rotating member 330. The distance from the first light-emitting diode 341 to the rotation axis L is equal to the distance from the second light-emitting diode 342 to the rotation axis L. Similarly, the first photosensitive element 351 and the second photosensitive element 352 are also arranged circumferentially along the rotating member 330. The first photosensitive element 351 and the second photosensitive element 352 are disposed in the same plane, which is parallel to the plane containing the rotating member 330. The distance from the first photosensitive element 351 to the rotation axis L is equal to the distance from the second photosensitive element 352 to the rotation axis L. Figure 7 As shown by the arrow, the arrow is in a counter-clockwise direction. The second light-emitting diode 342 is located upstream of the first light-emitting diode 341 in the counter-clockwise direction, and the second photosensitive element 352 is located upstream of the first photosensitive element 351 in the counter-clockwise direction.

[0120] Furthermore, the structure of the rotating member 330 in one embodiment is described. As described in the above embodiments... Figure 8The rotating component 330 shown has 10 light-transmitting areas 334 and 10 light-shielding areas 335 arranged circumferentially. These areas are all arranged around the same circumference along the rotation axis L. The length of each light-transmitting area 334 and each light-shielding area 335 is the same. Taking the first light-transmitting area 334A, the first light-shielding area 335A, the second light-transmitting area 334B, and the second light-shielding area 335B as examples, their respective central angles are all 18°. The first light-emitting diode 341 and the second light-emitting diode 342 are both located on the same axial side of the rotating component 330, emitting light signals towards either the light-shielding area 335 or the light-transmitting area 334. The first photosensitive element 351 and the second photosensitive element 352 are both located on the other axial side of the rotating component 330, facing either the light-shielding area 335 or the light-transmitting area 334, to receive or wait to receive light signals. It should be understood that the first light-emitting diode 341 is positioned facing the first photosensitive element 351, and the light signal emitted by the first light-emitting diode 341 can only be received by the first photosensitive element 351, and cannot be received by other photosensitive elements, and the others are positioned in the same way.

[0121] Figure 9 for Figure 7 The first schematic diagram in the illustrated embodiment generates forward and reverse signals. Figure 10 for Figure 9 The signal waveform diagram in the illustrated embodiment. Figure 9 In the diagram, for ease of description, the first light-transmitting area 334A, the first light-blocking area 335A, the second light-transmitting area 334B, and the second light-transmitting area 334B are pulled until they are on the same straight line. (A)(B)(C)(D) represent the changes in the positional relationship between the rotating component 330 and the electroluminescent component 340 when the rotating component 330 rotates. Keeping the positions of the first light-emitting diode 341 and the second light-emitting diode 342 in the electroluminescent component 340 unchanged, so that... Figure 7 When the rotating component 330 rotates counterclockwise, it will sequentially exhibit the stages shown in (A), (B), (C), and (D). In (A), both the first LED 341 and the second LED 342 correspond to the first light-transmitting area 334A. As the rotating component 330 rotates counterclockwise, in (B), the second LED 342 begins to correspond to the first light-blocking area 335A, while the first LED 341 still corresponds to the first light-transmitting area 334A. As the rotating component 330 continues to rotate counterclockwise, in (C), the second LED 342 still corresponds to the first light-blocking area 335A, while the first LED 341 begins to correspond to the first light-blocking area 335A. As the rotating component 330 continues to rotate counterclockwise, in (D), the second LED 342 begins to correspond to the second light-transmitting area 334B, while the first LED 341 still corresponds to the first light-blocking area 335A.

[0122] like Figure 10As shown, assuming the rotating component 330 rotates at a constant speed, the optical signal received by the photoelectric conversion component 350 will change with a fixed period T. Figure 10 The upper middle part is the first photosensitive element 351. Figure 9 The waveform of the received optical signal during the action shown is as follows. Figure 10 The lower part is the second photosensitive element 352. Figure 9 The waveform of the received light signal during the operation is shown. The rising edge 360B of the waveform corresponding to the second photosensitive element 352 lags behind the rising edge 360A of the waveform corresponding to the first photosensitive element 351 by 3 / 4 of a period T. Therefore, the rotation direction of the rotating component 330 can be determined by the degree to which the rising edge 360B of the waveform corresponding to the second photosensitive element 352 lags behind the rising edge 360A of the waveform corresponding to the first photosensitive element 351 within the same period. Assuming that in... Figure 7 When rotating counterclockwise as shown, the speed control unit 30 needs to generate a forward rotation signal. The waveform of the forward rotation signal is then... Figure 10 The waveform shown indicates that the rising edge 360B of the waveform corresponding to the second photosensitive element 352 lags behind the rising edge 360A of the waveform corresponding to the first photosensitive element 351 by 3 / 4 period T. In other words, the first photosensitive element 351 receives the light signal emitted by the first light-emitting diode 341 to generate a first steering signal, the waveform of which is shown below. Figure 10 As shown in the upper middle part, the second photosensitive element 352 is used to receive the light signal emitted by the second light-emitting diode 342 to generate a second steering signal. The waveform of the second steering signal is shown in the figure below. Figure 10 As shown in the lower part of the diagram. When the rotating member 330 rotates forward and backward, the phase difference between the second steering signal and the first steering signal is different. In this embodiment, this means that when the rotating member 330 rotates forward, the rising edge 360B of the waveform (second steering signal) corresponding to the second photosensitive element 352 lags behind the rising edge 360A of the waveform (first steering signal) corresponding to the first photosensitive element 351 by 3 / 4 period T. The electrical signals generated by the first photosensitive element 351 and the second photosensitive element 352 together constitute the forward rotation signal.

[0123] Figure 11 for Figure 7 The illustrated embodiment shows a second schematic diagram for generating forward and reverse signals. Figure 12 for Figure 11 The signal waveform diagram in the illustrated embodiment. Further, through... Figure 11 and Figure 12 The illustrated embodiment describes the process by which the speed control unit 30 needs to generate a reversal signal. That is, in Figure 7 When the rotating component 330 is rotated clockwise from the perspective shown, the speed control unit 30 needs to generate a reverse signal.

[0124] exist Figure 11 In the diagram, for ease of description, the first light-transmitting area 334A, the first light-blocking area 335A, the second light-transmitting area 334B, and the second light-transmitting area 334B are pulled until they are on the same straight line. (E)(F)(G)(H) represent the changes in the positional relationship between the rotating component 330 and the electroluminescent component 340 as the rotating component 330 rotates. Keeping the positions of the first light-emitting diode 341 and the second light-emitting diode 342 in the electroluminescent component 340 fixed, so that... Figure 7 As the rotating component 330 rotates clockwise, it sequentially presents the stages shown in (E), (F), (G), and (H). In (E), both the first LED 341 and the second LED 342 correspond to the second light-transmitting area 334B. As the rotating component 330 rotates clockwise, in (F), the second LED 342 still corresponds to the second light-blocking area 335B, while the first LED 341 begins to correspond to the second light-transmitting area 334B. As the rotating component 330 continues to rotate clockwise, in (G), the second LED 342 begins to correspond to the second light-transmitting area 334B, while the first LED 341 still corresponds to the second light-transmitting area 334B. As the rotating component 330 continues to rotate clockwise, in (H), the second LED 342 still corresponds to the second light-transmitting area 334B, while the first LED 341 begins to correspond to the first light-blocking area 335A.

[0125] like Figure 12 As shown, assuming the rotating component 330 rotates at a constant speed, the optical signal received by the photoelectric conversion component 350 will change with a fixed period T. Figure 12 The upper middle part is the first photosensitive element 351. Figure 11 The waveform of the received optical signal during the action shown is as follows. Figure 12 The lower part is the second photosensitive element 352. Figure 11 The waveform of the received light signal during the operation is shown. The rising edge 360B of the waveform corresponding to the second photosensitive element 352 lags behind the rising edge 360A of the waveform corresponding to the first photosensitive element 351 by 1 / 4 period T. Therefore, the rotation direction of the rotating component 330 can be determined by the degree to which the rising edge 360B of the waveform corresponding to the second photosensitive element 352 lags behind the rising edge 360A of the waveform corresponding to the first photosensitive element 351 within the same period. Assuming that in... Figure 7 When rotating clockwise as shown, the speed control unit 30 needs to generate a reverse signal. The waveform of the reverse signal is then... Figure 12The waveform shown indicates that the rising edge 360B of the waveform corresponding to the second photosensitive element 352 lags behind the rising edge 360A of the waveform corresponding to the first photosensitive element 351 by 1 / 4 period T. In other words, in this embodiment, the first photosensitive element 351 is used to receive the light signal emitted by the first light-emitting diode 341 to generate a first steering signal, and the waveform of the first steering signal is shown below. Figure 12 As shown in the upper middle part, the second photosensitive element 352 is used to receive the light signal emitted by the second light-emitting diode 342 to generate a second steering signal. The waveform of the second steering signal is shown in the figure below. Figure 12 As shown in the lower part of the diagram. When the rotating member 330 rotates clockwise and counterclockwise, the phase difference between the second steering signal and the first steering signal is different. In this embodiment, this means that when the rotating member 330 rotates counterclockwise, the rising edge 360B of the waveform (second steering signal) corresponding to the second photosensitive element 352 lags behind the rising edge 360A of the waveform (first steering signal) corresponding to the first photosensitive element 351 by 1 / 4 period T. The electrical signals generated by the first photosensitive element 351 and the second photosensitive element 352 together constitute the reversal signal.

[0126] In other embodiments, the speed acquisition unit 321 includes a speed sensor, and the displacement acquisition unit 322 includes a displacement sensor. The speed sensor may be at least one of a Hall effect sensor, an optical encoder, and a magnetoelectric sensor. The displacement sensor may be at least one of a potentiometer, a rotary encoder, and a capacitive displacement sensor.

[0127] In one embodiment, to allow the user to promptly perceive the speed change during a single operation of the speed control knob 311, the fan can also be equipped with a display component. This display component can be a display screen 40 or an LED light. The display component can display the current speed of the fan assembly 10 in real time. Specifically, as shown... Figure 2 , Figure 4 and Figure 5 As shown, the display component includes a display screen 40, which is configured to display any one of the Y gears. The display screen 40 responds to the rotation of the speed control knob 311 to display the current gear of the fan assembly 10.

[0128] The display component can be electrically connected to the control unit 20. The control unit 20 generates a speed change signal based on the gear shift signal and the gear distance signal, and simultaneously displays the gear change on the display screen 40. For example, the display screen 40 is configured to display any one of 100 gears. If the fan's current gear is 1, the display screen 40 will show the fan's current gear 1. When the user's target gear is 19, the user increases the gear using the speed control knob 311. During a single operation of the speed control knob 311, the gear displayed on the display screen 40 increases from 1. The gear displayed on the display screen 40 changes multiple times, from gear 1 all the way up to gear 19.

[0129] In one embodiment, the amount of gear change of the display screen 40 each time is fixed, for example, it can be 1 gear, jumping from gear 1 to gear 19 in 18 jumps.

[0130] In one embodiment, the amount of gear change in each iteration of the display screen 40 can be variable, and can involve multiple gear changes, such as two gears, jumping from gear 1 to gear 19 in nine iterations. The amount of gear change in each iteration of the display screen 40 can be determined by the speed of the speed control knob 311. A higher speed of the speed control knob 311 results in a larger amount of gear change in each iteration, and a lower speed results in a smaller amount of gear change in each iteration. With this design, the gear display on the display screen 40 remains clearly visible even when the user quickly rotates the speed control knob 311. For example, if the display screen 40 needs to show a change from gear 1 to gear 19 within one second, if the gear change amount is fixed at 1 gear per iteration, the display screen 40 would have to change 18 times within one second, making the displayed gear information difficult to see. However, if the gear changes by a different amount each time, with the first change being from gear 1 to gear 10 and the second change being from gear 10 to gear 10, the display screen 40 will switch twice within one second, making it easier for the user to see the gear status displayed on the display screen 40.

[0131] In one embodiment, when a user operates the speed control knob 311 in a single operation, the speed control unit 30 can change the gear multiple times in response to the user's single operation, with each gear change displayed by the display component. During a single operation, the user can clearly perceive the granularity of gear control. Therefore, the display component needs to display multiple times to allow the user to perceive the granularity of gear control. For example, if the user needs to adjust the gear from 1 to 20 in a single operation, the user first rotates the speed control knob 311 at a relatively fast speed, changing the gear from 1 to 15. During this stage, the display component displays the gear change at least twice, allowing the user to perceive the gear control process. Then, based on this perception, the user rotates the speed control knob 311 at a slower speed, changing the gear from 15 to 20.

[0132] Therefore, in one embodiment, when the speed control knob 311 is rotated by an angle X at a first speed, the display screen 40 displays the gear change at least twice in units of M gears; when the speed control knob 311 is rotated by an angle X at a second speed, the display screen 40 displays the gear change at least twice in units of N gears. For example, when the speed control knob 311 is rotated 90° at the first speed, the display screen 40 displays the gear change at least twice in units of 3 gears; when the speed control knob 311 is rotated 90° at the second speed, the display screen 40 displays the gear change at least twice in units of 1 gear.

[0133] In this way, users can clearly feel the granularity of gear control during a single operation. If they perceive that the previous operation is too fast or too slow during a single adjustment, they can adjust the subsequent adjustment in time, achieving fast and precise control.

[0134] like Figure 1 As shown, a fan includes a fan assembly 10, a speed control unit 30, and a control unit 20. The control unit 20 is electrically connected to the speed control unit 30 and the fan assembly 10, and is used to control the speed of the motor 101 in the fan assembly 10 based on signals from the speed control unit 30, or to control the speed setting of the fan assembly 10. The speed setting is related to the speed of the motor 101; a higher speed setting results in a higher motor speed, and a lower speed setting results in a lower motor speed.

[0135] In one embodiment, such as Figure 15 As shown, the control unit 20 includes registers, memory, a controller, and a clock circuit. The memory includes random access memory (RAM) and non-volatile memory (such as EEPROM). Random access memory (RAM) typically refers to dynamic random access memory (DRAM) and static random access memory (SRAM). DRAM uses capacitors to store charge to represent data; a charged capacitor represents "1," and a discharged capacitor represents "0." However, the charge in the capacitor gradually leaks, requiring periodic refresh. SRAM, on the other hand, uses the states of flip-flops to store data; as long as power is supplied, the data remains stable and does not require refresh. Non-volatile memory includes various types of memory, including flash memory. Their common characteristic is that they retain data even after power is lost, but their operating principles differ. For example, phase-change memory uses the resistance difference of materials in different phase states to store data; resistive switching memory stores information by changing the resistance state of the material. The control unit 20 also includes pins for electrically connecting the control unit 20 to external components, allowing external electrical signals to be transmitted to the control unit 20 through the pins (input pins), or allowing control signals generated by the control unit 20 to be transmitted to the controlled external components through the pins (output pins).

[0136] The fan assembly 10 is configured to have Y speed settings, each of which corresponds to a specific operating speed. A program is stored in the memory, and the total number of speed settings Y is configured within the program, such as... Figure 13-1 As shown, the control unit 20 includes a graph with Y gears, and the controller controls the fan assembly 10 to operate at the fan speed corresponding to one of the gears.

[0137] like Figure 14 As shown, the speed control unit 30 includes a shift control component 370 and a gear shift control component 380. The control unit 20 is electrically connected to the shift control component 370. In response to the action of the shift control component 370, the control unit 20 causes the fan assembly 10 to change M gears. The control unit 20 is also electrically connected to the gear shift control component 380. In response to the action of the gear shift control component 380, the control unit 20 changes the value of M, where Y>M≥1.

[0138] When the speed control unit 30's shift control unit 370 and gear shift control unit 380 are operated by the user, the circuits connected to them will change on / off, causing the connected control unit 20 to change the level state of its input and output pins, generating operation signals. These operation signals may include, for example, upshifting, downshifting, shifting, or gear shift signals. In one operation example, the controller of the control unit 20 controls the fan assembly 10 to operate at gear 2. When the shift control unit 370 and / or the gear shift control unit 380 are buttons, pressing the button changes the input pin level from high to low; releasing the button restores the input pin level to high. The controller of the control unit 20 can then perform corresponding processing based on the high and low level signals (shifting and gear shift signals), for example, adjusting the fan assembly 10's gear from 2 to 3, or from 2 to 4. The specific target gear is determined by the gear change value M indicated by the gear shift control unit 380.

[0139] For example, the memory stores a program, and the gear shift value M is adjusted by the controller based on the signal input from the gear shift operation unit 380. Figure 13-2In the cycle shown in the figure. For example, the default value of M is 1. Each time a signal input from the pitch operating member 380 is detected, the controller increments the value of M by 1 and records it in a non-volatile memory (such as EEPROM). EEPROM is the abbreviation of Electrically Erasable Programmable Read-Only Memory. When the controller detects a shift-jumping signal input from the shift-jumping operating member 370, it first extracts the pitch signal from the non-volatile memory (such as EEPROM), and then performs a corresponding shift-jumping operation. Wherein, after the value of M increases to the maximum value X (X<Y-1), the value of M can be returned to the minimum value 1. The controller executes a program under the control of a clock circuit according to the signal condition of the speed regulation unit 30 (such as a shift-jumping signal or a pitch signal), so as to output a speed-increasing signal or a speed-reducing signal, where the speed-increasing signal or the speed-reducing signal represents the rotation speed of the fan corresponding to the target gear.

[0140] The following implementation can be used to generate the shift-jumping signal. When a user operates the shift-jumping operating member 370, for example, pressing a button or rotating a knob, a circuit connected to the shift-jumping operating member 370 changes correspondingly, thereby generating an electrical signal, which is, for example, the shift-jumping signal. Wherein, the shift-jumping signal may include an upshift signal and a downshift signal for indicating the gear changing direction. The generation of the shift-jumping signal is based on the user's specific operation. For example, when the button is pressed, the circuit is conducted to generate a low-level signal; when the knob is rotated, the resistance value is changed through elements such as a potentiometer, thereby generating a voltage signal related to the rotation angle. Wherein, when the shift-jumping operating member 370 is a button, the user can generate a shift-jumping signal by short-pressing the shift-jumping operating member 370, so that the gear is changed once; alternatively, the user can continuously generate shift-jumping signals by long-pressing the shift-jumping operating member 370, so that the gear is changed continuously.

[0141] The following implementation can be used to generate the pitch signal. When a user operates the pitch operating member 380, for example, adjusting a sliding rheostat or pressing a setting button, a relevant circuit parameter is caused to change, thereby generating the pitch signal. For example, the sliding of the sliding rheostat changes the resistance value, thereby generating a voltage signal corresponding to the sliding position, and the magnitude of the signal reflects the value of the pitch M that the user expects to set.

[0142] The controller of control unit 20 performs corresponding processing based on the aforementioned speed-up signal and speed interval signal, such as increasing or decreasing the speed of fan assembly 10. Compared with the prior art, this technical solution has the following advantages. Existing fans, when configured with a large number of adjustable speeds, are limited by the number of speed adjustment components. Users can only change speed by one level at a time, making it time-consuming to shift from a low speed to a high speed (e.g., from speed 1 to speed 50). Alternatively, users can only change speeds by 10 levels at a time, which, while allowing for quick shifts, results in a coarse granularity of speed adjustment, preventing precise speed control. In the above embodiment, only the speed-up operation component 370 and the speed interval operation component 380 are needed to achieve both rapid adjustment to the target speed and precise speed control. For example, when a user needs to quickly adjust from gear 1 to gear 50, the gear shift control 380 changes the M value, which represents the amount of gear change. A larger M value indicates that the fan assembly 10 will change gears more significantly when the gear shift control 370 is activated. Similarly, when a user needs to change from gear 50 to gear 51, the gear shift control 380 changes the M value; a smaller M value indicates that the fan will change gears less significantly when the gear shift control 380 is activated. This achieves the dual functions of quickly adjusting to the target gear and precise gear shifting.

[0143] In one embodiment, such as Figure 16 As shown, the fan includes a speed-up operation unit 370, which includes a first operation unit 371 and a second operation unit 372. The first operation unit 371 is electrically connected to an input pin of the control unit 20 and is used to increase the speed of the fan assembly 10 in response to a user's operation. The second operation unit 372 is electrically connected to another input pin of the control unit 20 and is used to decrease the speed of the fan assembly 10 in response to a user's operation.

[0144] The fan also includes a speed control component 380, which is connected to the third input pin of the control unit 20. When the speed control component 380 is activated, it changes the speed by the amount M represented by the first control component 371 and the second control component 372. The fan also includes a switch 50. When the switch 50 is open, the fan assembly 10 starts working; when the switch 50 is closed, the fan assembly 10 stops working.

[0145] The first operating element 371, the second operating element 372, the speed control element 380, and the switch 50 are all buttons. They are arranged vertically in a straight line on the fan. From top to bottom, they are the first operating element 371, the second operating element 372, the speed control element 380, and the switch 50.

[0146] Of course, in other embodiments, the first operating member 371, the second operating member 372, the speed control member 380, and the switch 50 can also be arranged in other ways. For example, the fan handle includes a front side a and a rear side b opposite to the front side, and also includes a left side c and a right side d connecting the front side a and the rear side b. The first operating member 371 and the second operating member 372 are disposed on the front side a of the handle, the speed control member 380 is disposed on the rear side b of the handle, and the switch 50 is disposed on the left side c or the right side d.

[0147] In one embodiment, such as Figure 17 As shown, the gear shifting operation component 370 includes a first knob 373, which is electrically connected to the input pin of the control unit 20. The rotation axis of the first knob 373 is perpendicular to the surface on which the knob is located. The first knob 373 can rotate clockwise and counterclockwise to input voltage or current signals to the input pin of the control unit 20. For example, rotating clockwise is clockwise rotation, and rotating counterclockwise is counterclockwise rotation. When the first knob 373 rotates clockwise, it inputs an upshift signal to the control unit 20; when the first knob 373 rotates counterclockwise, it inputs a downshift signal to the control unit 20. In this embodiment, the gear position is changed by rotating the first knob 373. The gear shift control 380 is an independent button located below the gear shift control 370. The gear shift control 380 is electrically connected to one of the input pins of the control unit 20, used to input voltage or current signals to the input pin of the control unit 20. When the button is pressed and not pressed, it can input different signals to the input pin of the control unit 20; this signal is the gear shift signal, thereby allowing the control unit 20 to change the gear position according to the rotation of the first knob 373. In addition, a switch 50 is also located below the gear shift control 380. The switch 50 is also a button, electrically connected to one of the pins of the control unit 20 and the power supply, used to control the power supply to the fan.

[0148] In one embodiment, such as Figure 18As shown, the shift lever operation 370 includes a second knob 374, which has both a rotation operation mode and a press operation mode. The second knob 374 is connected to multiple input pins of the control unit 20 to input different signals to the control unit 20. For example, the second knob 374 can rotate forward or backward around a rotation axis to input voltage or current signals to the control unit 20. Furthermore, the rotation axis is configured to connect a microswitch and a resilient element. When the second knob 374 is pressed, the resilient element is compressed and the microswitch is pressed, thereby generating a press signal. When the second knob 374 is not pressed, the resilient element elastically resets and the microswitch resets, thereby generating an unpressed signal. These press and unpressed signals are used to indicate the gear shift signal. The rotation operation mode of the second knob 374 constitutes the shift lever operation 370, and the button operation mode of the second knob constitutes the gear shift operation 380. The second knob 374 can be rotated in both clockwise and counterclockwise directions. For example, rotating it clockwise is clockwise rotation, and rotating it counterclockwise is counterclockwise rotation. The gear position is changed by rotating the second knob 374. In this embodiment, to change the gear distance, simply press the second knob 374; to change the gear position, rotate the second knob 374 clockwise to increase the gear position, and rotate it counterclockwise to decrease the gear position.

[0149] In one embodiment, such as Figure 19 As shown, the shifting operation component 370 includes a toggle switch 375, which is electrically connected to one of the input pins of the control unit 20 for inputting upshift and downshift signals to the control unit 20. The toggle switch 375 typically consists of a housing, a lever, contacts, and a spring. The housing protects the internal components, the lever is the user-operated part, and its movement controls the state of the switch 50. The contacts are the components that enable or disable the circuit and are typically made of a metal material with good conductivity. The spring provides the elastic force for the lever operation, allowing it to return to its initial position or remain in the set position after operation.

[0150] The lever of the shifting operation component 370 can be moved in at least two different directions. When the lever is moved, it causes the internal contacts to move, changing the contact state between the contacts. For example, in a normally open lever switch 375, when the lever is not moved, the contacts are open and the circuit is open; when the lever is moved, the contacts close and the circuit is closed. Conversely, in a normally closed lever switch 375, the contacts are closed and the circuit is closed when not moved, and the contacts separate and the circuit is open when moved. In this way, the lever switch 375 controls the on / off state of the circuit, thereby inputting voltage or current representing increase and decrease signals to the control unit 20. The lever switch 375 oscillates in one direction to input an increase signal to the control unit 20, which then controls the fan assembly 10 to increase the gear level. The lever switch 375 oscillates in the other direction to input a decrease signal to the control unit 20, which then controls the fan assembly 10 to decrease the gear level. Below the lever switch 375, there is also a distance control component and a switch 50, and the arrangement of the distance control component 375 and the switch 50 is the same as in the above embodiment.

[0151] In one embodiment, such as Figure 14As shown, the control unit 20 is electrically connected to the speed control unit 30 and the fan assembly 10. The control unit 20 responds to the gear shift operation 380 by changing the gear shift change value M indicated when the gear shift operation 370 is activated. The gear shift operation 370 generates a gear shift signal, which is transmitted via a connection line to a specific input pin of the control unit 20 (e.g., the first pin). This pin typically has an internal input buffer circuit to stabilize and temporarily store the input signal, preventing signal jitter and interference. The gear shift operation 380 generates a gear shift signal, which is transmitted via a connection line to another specific input pin of the control unit 20 (e.g., the second pin). Similarly, the input buffer circuit inside this pin stabilizes and temporarily stores the signal, ensuring its accuracy and stability. The control unit 20 periodically reads the signal status of the input pins (e.g., the first and second pins) according to its internal clock signal rhythm. The clock signal is generated by the clock circuit inside the control unit 20, providing a time reference for the entire operation. Based on the read signal, the control unit 20 searches for the corresponding gear shift operation instruction in its internal program memory. The program memory stores code related to various operations and their corresponding functions. By parsing the input signals, it determines the specific gear shifting operation performed by the user, such as whether to shift up or down, and the shift magnitude (determined by the current M value). The control unit 20 reads the gear shift signal according to the rhythm of the clock signal and converts it into a digital quantity for processing. According to a pre-written program, it maps the received gear shift signal to the corresponding gear shift M. For example, it converts the input voltage signal value (gear shift signal) into the corresponding gear shift value, or determines the increase or decrease of gear shift based on the number of button presses received.

[0152] In one embodiment, such as Figure 15As shown, the input buffer circuit includes an input buffer register, which is a type of register. The input buffer register connects the input pins of the control unit 20 to the controller of the control unit 20. When a signal arrives at the control unit 20, it first reaches the input buffer register corresponding to the input pin. This register temporarily stores the pin's level state, waiting for the controller to read it. The control unit 20 reads the key state information in the input buffer register periodically according to the rhythm of the clock signal. The clock signal is generated by a clock circuit, typically composed of a crystal oscillator and auxiliary circuitry, providing a time reference for the operation of each component of the control unit 20, ensuring that the control unit 20 can accurately and stably read the key signals. The control unit 20 responds to the shift lever 370 by changing the gear position. The highest gear after the change is Y, and the lowest gear after the change is 1. The highest gear Y is the highest gear configured for the fan. Therefore, after the fan reaches the highest gear, even if the shift lever 370 is operated continuously, the control unit 20 will maintain the fan operating at the highest gear Y. Furthermore, the control unit 20 is configured to change the fan assembly 10 by M gears each time the shift switch 370 is operated multiple times, where M is less than Y. For example, if the highest fan gear is 100, the fan assembly 10 will change 10 gears each time the shift switch 370 is operated.

[0153] In one embodiment, the memory stores a program that maps gear positions to input signals. The memory may include non-volatile memory such as flash memory, and random access memory (RAM) connected to the flash memory. The program code is loaded from the flash memory into the RAM for execution. Based on the read button signals, such as upshift or downshift signals, the controller searches for the corresponding gear information in the program in the RAM. This process involves the control unit 20 parsing the program code and performing data lookup operations.

[0154] In some embodiments, flash memory can be replaced by non-volatile memories such as read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), phase-change memory (PCM), resistive random access memory (RRAM), ferroelectric random access memory (FeRAM), and magnetic random access memory (MRAM). Non-volatile memory (NVM) refers to computer memory whose stored data does not disappear when the current is turned off.

[0155] The control unit 20 compares and processes the read button status information with the gear position, gear interval, and input signal correspondence stored in the program. It utilizes its internal arithmetic logic unit (ALU) for data comparison and calculation. For example, it processes the input signal corresponding to the button and compares it with a pre-set threshold in the program to determine the specific gear position currently pressed. Figure 16 In the process, the control unit 20 internally records that the current operating speed of the fan assembly 10 is 90 and the speed interval M is 10. When the control unit 20 reads the button status information that the speed interval operation element 380 is pressed, the internal controller of the control unit 20 increments M by 1 through the arithmetic logic unit (ALU), making it 10. Then, when the control unit 20 reads the button status information that the first operation element 371 is pressed, the internal controller of the control unit 20 adds the value of the speed interval M, 11, to the current speed of 90 through the arithmetic logic unit (ALU) and compares it with the preset threshold (the maximum fan speed Y value 100). Since 101 is greater than the maximum fan speed 100, it is determined that the specific speed pressed by the button is 100, not 101.

[0156] When calculating the target gear, the controller calculates the target gear that the fan assembly 10 needs to switch to, based on the current gear position of the fan assembly 10, the direction of the gear shift operation, and / or the amplitude M represented by the gear distance signal. For example, if the current gear is 3, and the user performs an upward gear shift operation with M value 2, then the calculated target gear is 5. After determining the target gear, the controller sends a control signal to the motor drive circuit through its output pin. This signal is usually a digital signal; for example, different control commands are represented by changing the level of the pin, such as a high level indicating an upward gear shift and a low level indicating a downward gear shift. The pulse width or frequency of the signal may be related to the magnitude of the gear shift.

[0157] In one embodiment, the fan assembly 10 includes a motor 101 and a motor control chip or motor drive circuit. The motor control chip or motor 101 drive circuit is electrically connected to the control unit 20. After receiving a control signal sent by the controller of the control unit 20, the chip decodes and amplifies the signal, converting it into a high-voltage signal capable of driving the motor 101. According to the requirements of the control signal, the drive circuit adjusts the voltage or current output to the motor 101, thereby causing the motor 101 to operate at the speed corresponding to the target gear. For example, for a voltage-driven motor 101, for higher gears, the drive circuit outputs a higher voltage, increasing the motor 101 speed; for lower gears, it outputs a lower voltage, decreasing the motor 101 speed. Alternatively, for a motor 101 controlled by a PWM signal, the speed of the motor 101 is controlled by changing the duty cycle of the PWM signal. A larger duty cycle of the PWM signal results in a faster motor 101 speed, while a smaller duty cycle results in a slower motor 101 speed.

[0158] In one embodiment, the control unit 20 stores the gear value M in memory. The controller stores the processed gear value M in its internal random access memory (RAM) for use in subsequent gear shifting operations. Simultaneously, a copy of the gear value may also be stored in non-volatile memory such as EEPROM to ensure that the user-set gear value is remembered after the device is powered off and restarted. When the user operates the gear shifting operation 370 again, the controller reads the currently stored gear value M from RAM when calculating the target gear and determines the gear shifting range based on this value. For example, if the current gear value M is set to 3, and the user performs an upward gear shifting operation, the fan assembly 10 will adjust its speed by shifting 3 gears at a time.

[0159] The button signal is transmitted to the control unit 20 through a pin. An input buffer circuit can be configured inside the pin, which may include a pull-up resistor or a pull-down resistor to ensure a stable voltage level on the pin when the button is not pressed, preventing voltage fluctuations. A pull-up resistor connects an uncertain signal to a high voltage level through a resistor, keeping the signal high when there is no external interference. An example of using a pull-up resistor in a button circuit is as follows: one end of the button is grounded, and the other end is connected to the input pin of the control unit 20. A pull-up resistor (typically with a value between 4.7KΩ and 10KΩ) is connected between this input pin and the power supply (e.g., +5V). When the button is not pressed, the input pin is pulled high due to the pull-up resistor; when the button is pressed, the input pin is pulled low. A pull-down resistor connects an uncertain signal to a low voltage level through a resistor, keeping the signal low when there is no external signal interference. An example of using a pull-down resistor in a button circuit is as follows: one end of the button is connected to the power supply (e.g., +5V), and the other end is connected to the input pin of the control unit 20. Connect a pull-down resistor (typically between 4.7KΩ and 10KΩ) between the input pin and ground. When the button is not pressed, the input pin is pulled low due to the pull-down resistor; when the button is pressed, the input pin is pulled high.

[0160] In one embodiment, after the fan is powered on, the control unit 20 begins executing the initialization program. The control unit 20 continuously scans the pin status, and if no gear signal is detected from the gear operation unit 380, it reads the gear value M saved at the time of the last shutdown from non-volatile memory (such as EEPROM). The gear value M is... Figure 13-2 Any one of the charts shown. If it is the first power-on or there is no valid data in the EEPROM, the default M value of 1 will be used.

[0161] Simultaneously, the control unit 20 initializes the relevant registers, configures the pin operating modes, sets the pins connected to the first operating unit 371 and the second operating unit 372 in the speed-jumping operation unit 370 to input mode, and enables the internal pull-up or pull-down resistors as needed to ensure that the pins are in a stable level state when not subjected to external signals. At the same time, the control unit 20 loads the current operating speed of the fan assembly 10, the program in flash memory, and the information stored in non-volatile memory into the random access memory.

[0162] When the user presses the first operating element 371 to increase the gear level, the voltage level of the pin connected to the first operating element 371 changes. If an internal pull-up resistor is used, the pin is normally high, and becomes low after the button is pressed; if a pull-down resistor is used, the pin is normally low, and becomes high through external circuitry after the first operating element 371 is pressed. Similarly, when the second operating element 372 (the gear-down button) is pressed, the corresponding pin will also produce a corresponding voltage level change.

[0163] The level change signal of the pin is input to the control unit 20. The input buffer inside the control unit 20 buffers and shapes the signal, removing any noise and glitches, and ensuring the stability and accuracy of the signal.

[0164] The control unit 20 periodically scans the state of the input pins based on the clock signal generated by the internal clock circuit. When a change in the pin level corresponding to the first operating element 371 is detected (e.g., from high to low), the control unit 20 determines that it is an operation to increase the gear level; when a change in the pin level corresponding to the second operating element 372 is detected, it determines that it is an operation to decrease the gear level.

[0165] The control unit 20 reads the currently saved gear value M and the current gear information of the fan assembly 10 from its internal random access memory (RAM).

[0166] If the first operating element 371 is pressed, the control unit 20 adds M to the current gear value to obtain the target gear; if the second operating element 372 is pressed, the control unit 20 subtracts M from the current gear value to obtain the target gear. During the calculation process, the control unit 20 ensures that the target gear is within the effective gear range of the fan assembly 10 (0 to Y gear). If it exceeds the range, appropriate boundary processing is performed, such as not increasing the gear after reaching the highest gear and not decreasing the gear after reaching the lowest gear.

[0167] The control unit 20 sends a control signal to the motor 101 drive circuit through its output pin according to the calculated target gear. This signal can be a PWM (Pulse Width Modulation) signal, whose duty cycle corresponds to the target gear. For example, the larger the duty cycle, the higher the speed of the motor 101, corresponding to a higher gear; the smaller the duty cycle, the lower the speed of the motor 101, corresponding to a lower gear.

[0168] After receiving the PWM signal sent by the control unit 20, the drive circuit of motor 101 decodes and amplifies it. According to the duty cycle of the PWM signal, the drive circuit adjusts the voltage or current output to motor 101, thereby controlling motor 101 to operate at the speed corresponding to the target gear, realizing the change of the gear of fan assembly 10.

[0169] In another embodiment, after the fan is powered on, the control unit 20 begins executing an initialization program. The control unit 20 continuously scans the pin status, and when it detects a gear shift signal input from the gear shift operator 380, the connected circuitry changes, generating an electrical signal related to the gear shift setting. For example, the gear shift operator 380 might be a potentiometer; rotating the potentiometer changes its resistance, thereby generating a voltage signal proportional to the rotation angle. Alternatively, it could be a button combination, where different button presses or combinations of press durations represent different gear shift settings.

[0170] The gear shift signal generated by the gear shifting operation unit 380 is transmitted to a specific input pin of the control unit 20 via a connection line. The input buffer inside this pin processes the signal, stabilizes the signal level, and removes noise.

[0171] The control unit 20 reads the signals from the input pins corresponding to the gear shifting mechanism 380 at regular intervals according to the rhythm of its internal clock signal. Based on a pre-written program, the input analog voltage signal (such as a signal from a potentiometer) is converted into a digital quantity via an ADC (analog-to-digital converter) to obtain the gear shifting value M set by the user.

[0172] The controller in control unit 20 stores the new gear value M in its internal RAM and also saves it to non-volatile memory such as EEPROM so that the setting can be used the next time the device is powered on.

[0173] Similar to the step of generating a signal by operating the first or second operating element in the first process of the previous embodiment, when the user presses the first operating element 371 or the second operating element 372, the corresponding input pin generates a level change signal, which indicates an operation request to increase or decrease the gear.

[0174] After the signal is input to the control unit 20, the subsequent processing is similar to that in the previous embodiment. The controller reads the currently saved gear value M and the current gear information of the fan assembly 10, calculates the target gear according to the signal of the first operating element 371 or the second operating element 372, and then sends a PWM control signal to the motor 101 drive circuit through the output pin. The motor 101 drive circuit adjusts the speed of the motor 101 according to the signal, so that the fan assembly 10 changes gear according to the newly set gear M.

[0175] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0176] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An adjustable speed fan, characterized in that, It includes a fan assembly, a speed control unit, and a control unit. The control unit calculates the duty cycle of a PWM signal based on the signal generated by the speed control unit, and adjusts the speed of the fan assembly according to the duty cycle of the PWM signal.

2. The adjustable fan according to claim 1, characterized in that, The fan assembly is configured to have Y speed positions, each of the Y speed positions having a corresponding operating speed; the control unit is electrically connected to the fan assembly, and the speed regulating unit includes a shifting operation component and a gear interval operation component electrically connected to the control unit; the control unit, in response to the action of the shifting operation component, causes the fan assembly to change M speed positions, and the control unit is used to change the value of M in response to the action of the gear interval operation component, wherein Y>M≥1.

3. The adjustable fan according to claim 2, characterized in that, The gear shifting mechanism includes a first operating component and a second operating component. The first operating component is used to increase the gear of the fan assembly, and the second operating component is used to decrease the gear of the fan assembly.

4. The adjustable fan according to claim 2, characterized in that, The gear shifting mechanism includes a first knob that can be rotated forward to increase the gear of the fan assembly; the first knob can also be rotated in reverse to decrease the gear of the fan assembly.

5. The adjustable fan according to claim 2, characterized in that, The speed control unit includes a second knob, which has a rotation operation mode and a pressing operation mode. The rotation operation mode of the second knob constitutes the gear shifting operation component, and the pressing operation mode of the second knob constitutes the gear distance operation component.

6. The adjustable fan according to claim 2, characterized in that, The gear shifting mechanism includes a toggle switch, which can be moved in at least different directions. The toggle switch can be moved in one direction to increase the gear of the fan assembly, and moved in another direction to decrease the gear of the fan assembly.

7. The adjustable fan according to claim 2, characterized in that, The adjustable fan includes a control unit for controlling the gear position, the control unit being used in response to the gear shifting operation to change the gear shift change value M represented when the shifting operation is actuated.

8. The adjustable fan according to claim 2, characterized in that, The control unit responds to the shifting operation to change the gear, with the highest gear being Y and the lowest gear being 1.

9. The adjustable fan according to claim 2, characterized in that, The control unit is configured to change the fan assembly by M gears each time the gear shifting operation is operated multiple times.

10. The adjustable fan according to claim 2, characterized in that, The control unit includes a memory and a controller electrically connected to the memory. The memory stores an M-value table via a program, and the controller selects a value for M from the M-value table.

11. The adjustable fan according to claim 2, characterized in that, The control unit includes a non-volatile memory for storing gear change values ​​M, so that the adjustable fan can remember the gear setting before the power failure after a power outage and restart.

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