Intelligent desktop fan

Abstract

The application discloses an intelligent desktop fan, which comprises a fan module, a human body sensor and a fan control circuit; the fan control circuit is connected with the fan module and the human body sensor respectively. The human body sensor detects the human body and its distance parameter and orientation parameter relative to the intelligent desktop fan, and outputs a corresponding human body detection signal, so that the fan control circuit adjusts the rotating speed and direction of the fan module according to the human body detection signal. That is, when the user selects the gear of the intelligent desktop fan, and the distance and direction of the user relative to the intelligent desktop fan change after the user moves, the intelligent desktop fan can automatically adjust the wind speed and direction, so that the user can always blow the wind of the corresponding wind force of the selected gear, thereby realizing intelligent speed regulation and intelligent tracking, and the intelligence of the intelligent desktop fan is higher, which can meet the needs of the user.

Description

Technical Field

[0001] This invention relates to the field of intelligent desktop fan control technology, and in particular to an intelligent desktop fan. Background Technology

[0002] Desktop fans are lightweight and compact electric fans suitable for personal use or cooling in small spaces. However, existing desktop fans have a fixed airflow speed and oscillation angle after the user selects a speed setting. If the user moves while the fan is on, their distance and direction relative to the fan change, but the fan's airflow speed and oscillation angle remain unchanged. This forces users to manually adjust the fan's direction and speed to achieve the desired effect. Desktop fans lack intelligence and fail to meet user needs. Summary of the Invention

[0003] The main objective of this invention is to provide an intelligent desktop fan that addresses the problem of low intelligence and difficulty in meeting user needs in desktop fans.

[0004] To achieve the above objectives, the present invention proposes an intelligent desktop fan, the intelligent desktop fan comprising:

[0005] Fan module;

[0006] A human body sensor is used to detect the human body and its distance and orientation parameters relative to the smart desktop fan, and outputs a corresponding human body detection signal.

[0007] A fan control circuit is provided, wherein the input terminal of the fan control circuit is connected to the human body sensor, and the control terminal of the fan control circuit is connected to the fan module. The fan control circuit is used to adjust the speed and direction of the fan module according to the human body detection signal.

[0008] In one embodiment, the human body sensor is also used to detect the number of human bodies and output a corresponding human body detection signal;

[0009] The fan control circuit is used to determine the number and orientation parameters of the human body based on the human body detection signal, so as to adjust the speed and direction of the fan module.

[0010] In one embodiment, the human body sensor includes multiple sets of through-beam switches, each set of through-beam switches including a photoelectric emitter and a photoelectric receiver. The controlled end of each photoelectric emitter is connected to the fan control circuit, and the output end of each photoelectric receiver is connected to the input end of the fan control circuit. The human body sensor is used to output a corresponding human body detection signal based on the output signal of the photoelectric receiver in each set of through-beam switches.

[0011] In one embodiment, the smart desktop fan includes:

[0012] A trigger circuit, the output of which is connected to the fan control circuit, is used to output a corresponding trigger signal when triggered.

[0013] The fan control circuit is also used to adjust the speed and direction of the fan module according to the trigger signal.

[0014] In one embodiment, the trigger circuit includes:

[0015] A wind speed setting circuit, the output of which is connected to the fan control circuit, is used to set the wind speed of the fan module and output a corresponding wind speed setting signal.

[0016] The fan control circuit is also used to adjust the speed of the fan module according to the wind speed setting signal.

[0017] In one embodiment, the trigger circuit further includes:

[0018] A steering setting circuit, the output of which is connected to the fan control circuit, is used to set the steering direction of the fan module and output a corresponding steering setting signal.

[0019] The fan control circuit is also used to adjust the direction of the fan module according to the direction setting signal.

[0020] In one embodiment, the smart desktop fan includes:

[0021] A mode setting circuit is provided, the output of which is connected to the fan control circuit. The mode setting circuit is used to set the working mode of the fan module and output a corresponding mode setting signal, which includes a normal mode and an intelligent mode.

[0022] The fan control circuit is also used to receive the trigger signal triggered by the user and adjust the speed and direction of the fan module when the working mode of the smart desktop fan is determined to be normal mode according to the mode setting signal.

[0023] Alternatively, when the working mode of the smart desktop fan is determined to be smart mode according to the mode setting signal, the speed and direction of the fan module are adjusted according to the human body detection signal.

[0024] In one embodiment, the smart desktop fan further includes:

[0025] A timer, the output of which is connected to the fan control circuit, is used to set the working time of the fan module and output a corresponding time setting signal;

[0026] The fan control circuit is also used to control the fan module to work according to the trigger signal and the human body detection signal, and to control the fan module to stop working when no human body is detected within the working time corresponding to the time setting signal.

[0027] In one embodiment, the smart desktop fan includes:

[0028] The battery has its output terminals connected to the fan control circuit, the human body sensor, and the fan module, respectively, and is used to power the fan control circuit, the human body sensor, and the fan module.

[0029] A battery voltage detection circuit is provided, wherein the detection terminal of the battery voltage detection circuit is connected to the battery, and the output terminal of the battery voltage detection circuit is connected to the fan control circuit. The battery voltage detection circuit is used to detect the voltage of the battery and output a corresponding battery voltage detection signal.

[0030] The fan control circuit is also used to control the battery to stop supplying power to the fan control circuit, the human body sensor and the fan module when the voltage value corresponding to the battery voltage detection signal is lower than a preset voltage value.

[0031] In one embodiment, the fan control circuit includes:

[0032] The main controller has its input terminal connected to the human body sensor, and the main controller is used to output corresponding fan control signals based on the human body detection signal;

[0033] The drive circuit has its input terminal connected to the main controller and its output terminal connected to the fan module. The drive circuit is used to drive the fan module to work when it receives the fan control signal, so as to adjust the speed and direction of the fan module.

[0034] The technical solution of this invention uses a human body sensor to detect the human body and its distance and orientation parameters relative to the smart desktop fan, and outputs corresponding human body detection signals. This allows the fan control circuit to adjust the speed and direction of the fan module based on the human body detection signals. In other words, after the user selects the speed setting of the smart desktop fan, and the user moves, the smart desktop fan can automatically adjust the wind speed and direction when the user's distance and direction relative to the smart desktop fan change, so that the user can always feel the wind corresponding to the selected speed setting. This achieves intelligent speed adjustment and intelligent tracking, making the smart desktop fan more intelligent and sufficient to meet the user's needs. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 This is an overall block diagram of an embodiment of the intelligent desktop fan of the present invention;

[0037] Figure 2 This is a schematic diagram of a module of another embodiment of the intelligent desktop fan of the present invention;

[0038] Figure 3 This is a schematic diagram of a module of an embodiment of the human body sensor in the intelligent desktop fan of the present invention.

[0039] Explanation of icon numbers:

[0040] label name label name 10 Human body sensor 11 Through-beam switch 20 Fan control circuit 111 Photoelectric emitter 30 Fan module 112 Photodetector 40 Trigger circuit 21 Main controller 50 Mode setting circuit 22 drive circuit 60 timer 41 Wind speed setting circuit 70 Battery voltage detection circuit 42 Steering setting circuit 80 Battery

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0044] Desktop fans are lightweight and compact electric fans suitable for personal use or cooling in small spaces. However, existing desktop fans have a fixed airflow speed and oscillation angle after the user selects a speed setting. If the user moves while the fan is on, their distance and direction relative to the fan change, but the fan's airflow speed and oscillation angle remain unchanged. This forces users to manually adjust the fan's direction and speed to achieve the desired effect. Desktop fans lack intelligence and fail to meet user needs.

[0045] To address the aforementioned problems, this invention proposes an intelligent desktop fan.

[0046] Reference Figure 1 In one embodiment of the present invention, the intelligent desktop fan includes:

[0047] Fan module 30;

[0048] Human body sensor 10, the human body sensor 10 is used to detect the human body and its distance parameters and orientation parameters relative to the smart desktop fan, and output the corresponding human body detection signal;

[0049] A fan control circuit 20 is provided, the input terminal of which is connected to the human body sensor 10, and the control terminal of which is connected to the fan module 30. The fan control circuit 20 is used to adjust the speed and direction of the fan module 30 according to the human body detection signal.

[0050] In this embodiment, the human body sensor 10 can be implemented using any human body sensor capable of detecting the human body and its distance and orientation parameters relative to the smart desktop fan, such as a photoelectric switch 11. The fan control circuit 20 can be implemented using a main controller 21, such as an MCU, DSP (Digital Signal Processor), FPGA (Field Programmable Gate Array), or SOC (System on Chip). In this embodiment, the human body sensor 10 detects a human body and measures the distance and orientation parameters of the human body relative to the smart desktop fan. It then outputs a corresponding human body detection signal to the fan control circuit 20, which adjusts the speed and direction of the fan module 30 based on the human body detection signal. Specifically, when the human body sensor 10 detects a human body, it outputs a corresponding human body detection signal to the fan control circuit 20, which then controls the fan module 30 to start operating. While the fan module 30 is operating, if the human body sensor 10 detects a change in the distance between the human body and the smart desktop fan, it outputs a corresponding human body detection signal to the fan control circuit 20. The fan control circuit 20 then adjusts the speed of the fan module 30 based on the received human body detection signal, thus adjusting the wind force emitted by the smart desktop fan to ensure that the wind force received by the moved human body is consistent with that before the move. For example, when the distance between a person and the smart desktop fan is close, the speed of the fan module 30 is reduced so that the airflow from the smart desktop fan is less than before the person moved; while when the distance between the person and the smart desktop fan is far, the speed of the fan module 30 is increased so that the airflow from the smart desktop fan is greater than before the person moved, thus achieving intelligent wind speed compensation. When the fan module 30 is working, if the human body sensor 10 detects a change in the position of the person relative to the smart desktop fan, it outputs a corresponding human body detection signal to the fan control circuit 20. The fan control circuit 20 then adjusts the direction of the fan module 30 according to the received human body detection signal, that is, adjusts the direction of the airflow from the smart desktop fan, so that the person who has moved can still feel the airflow from the smart desktop fan. This solves the problem of having to manually adjust the wind speed and direction when the person moves, resulting in a higher level of intelligence and greater comfort. When the human body sensor 10 does not detect a person, it outputs a corresponding human body detection signal to the fan control circuit 20, which then controls the fan module 30 to stop working, reducing power consumption and saving electricity.

[0051] The technical solution of this invention uses a human body sensor 10 to detect the human body and its distance and orientation parameters relative to the smart desktop fan, and outputs a corresponding human body detection signal. This allows the fan control circuit 20 to adjust the speed and direction of the fan module 30 based on the human body detection signal. That is, when the user selects the speed of the smart desktop fan and the user moves, and the distance and direction of the user relative to the smart desktop fan change, the smart desktop fan can automatically adjust the wind speed and direction so that the user can always feel the wind corresponding to the selected speed. This achieves intelligent speed adjustment and intelligent tracking, making the smart desktop fan more intelligent and sufficient to meet the user's needs.

[0052] Reference Figure 2 and Figure 3 In one embodiment, the human body sensor 10 is also used to detect the number of human bodies and output a corresponding human body detection signal;

[0053] The fan control circuit 20 is used to determine the number and orientation parameters of the human body based on the human body detection signal, so as to adjust the speed and direction of the fan module 30.

[0054] In this embodiment, the human body sensor 10 can detect the number of human bodies and output a corresponding human body detection signal to the fan control circuit 20. The fan control circuit 20 determines the number and orientation parameters of the human bodies based on the human body detection signal, so as to adjust the speed and direction of the fan module 30. It can be understood that the fan control circuit 20 can determine the number of human bodies based on the human body detection signal. When the number of human bodies is one, the fan control circuit 20 determines the distance and orientation of the human body relative to the smart desktop fan based on the human body detection signal, so as to adjust the speed and direction of the fan module 30 according to the scheme of the previous embodiment. When there are multiple people, the fan control circuit 20 determines the distance between the people and the smart desktop fan, as well as their arrangement, based on the human body detection signal. Specifically, when the human body sensor 10 detects multiple people side by side and no other obstacles are detected, the fan control circuit 20 controls the fan module 30 to oscillate within the angle range of the side-by-side crowd, and adjusts the speed of the fan module 30 according to the distance between the crowd and the smart desktop fan. When the human body sensor 10 detects multiple people side by side and other obstacles are detected, the fan control circuit 20 controls the fan module 30 to oscillate within the angle range of the side-by-side crowd, and adjusts the speed according to the size of the detected obstacles and the distance between the crowd and the smart desktop fan. The fan module 30's rotation speed; when the human body sensor 10 detects multiple overlapping human bodies, the fan control circuit 20 adjusts the fan module 30's rotation speed according to the proportion of the overlapping human bodies. That is, when the overlap ratio is less than 30%, the fan control circuit 20 adjusts the fan module 30's rotation speed according to the distance of the crowd relative to the smart desktop fan. When the overlap ratio is between 30% and 70%, the fan control circuit 20 adjusts the fan module 30's rotation speed according to the distance of the obscured human body relative to the smart desktop fan. When the overlap ratio is greater than 70%, the fan control circuit 20 controls the fan module 30's rotation speed according to the distance of the crowd relative to the smart desktop fan, thereby achieving real-time adjustment of the smart desktop fan's wind direction and speed, resulting in higher intelligence.

[0055] In one embodiment, the human body sensor 10 includes multiple sets of through-beam switches 11. Each set of through-beam switches 11 includes a photoelectric emitter 111 and a photoelectric receiver 112. The controlled end of each photoelectric emitter 111 is connected to the fan control circuit 20, and the output end of each photoelectric receiver 112 is connected to the input end of the fan control circuit 20. The human body sensor 10 is used to output a corresponding human body detection signal based on the output signal of the photoelectric receiver 112 in each set of through-beam switches 11.

[0056] In this embodiment, the human body sensor 10 consists of multiple sets of through-beam switches 11, each set of through-beam switches 11 is arranged on the same side and is mounted on the smart desktop fan. It is understood that the human body sensor 10 can detect human bodies and their distance and orientation relative to the smart desktop fan, as well as the number of human bodies. Specifically, it outputs a corresponding human body detection signal to the fan control circuit 20 based on the output signal of the photoelectric receiver tube 112 in each set of through-beam switches 11. This allows the fan control circuit 20 to determine the human body and its distance and orientation relative to the smart desktop fan, as well as the number of human bodies, based on the human body detection signal, thereby adjusting the speed and direction of the fan module 30. Specifically, the infrared light-emitting diode of the photoelectric emitter tube 111 emits infrared light, which is reflected by the human body. The photosensitive receiver tube of the photoelectric receiver tube 112 receives the reflected light from the object in front. The intensity of the reflected light determines the distance and orientation of the human body relative to the smart desktop fan, as well as the number of human bodies. Since the light intensity received by the photoelectric receiver tube 112 varies with distance, the reflected light is stronger when the distance is close and weaker when the distance is far.

[0057] Reference Figure 2 In one embodiment, the smart desktop fan includes:

[0058] A trigger circuit 40, the output of which is connected to the fan control circuit 20, is used to output a corresponding trigger signal when triggered.

[0059] The fan control circuit 20 is also used to adjust the speed and direction of the fan module 30 according to the trigger signal.

[0060] In this embodiment, the trigger circuit 40 can be any trigger circuit 40 that outputs a corresponding trigger signal when triggered, such as a touchpad or button circuit. In this embodiment, a touchpad is selected as the trigger circuit 40. Compared with a button circuit, the user uses the touchpad to adjust the wind speed and direction of the smart desktop fan. The user adjusts the speed and direction of the fan module 30 by sliding the touch, making the user's perception of changes in wind speed and direction stronger. It can be understood that when the trigger circuit 40 is triggered by the user, it outputs a corresponding trigger signal, and the fan control circuit 20 adjusts the speed and direction of the fan module 30 according to the trigger signal.

[0061] In one embodiment, the trigger circuit 40 includes:

[0062] The wind speed setting circuit 41 is connected to the fan control circuit 20. The wind speed setting circuit 41 is used to set the wind speed of the fan module 30 and output a corresponding wind speed setting signal.

[0063] The fan control circuit 20 is also used to adjust the rotational speed of the fan module 30 according to the wind speed setting signal.

[0064] In this embodiment, the wind speed setting circuit 41 can be implemented using any wind speed setting circuit 41 that can set the wind speed of the fan module 30, such as a touchpad. It is understood that the wind speed setting circuit 41 allows the user to set the wind speed of the fan module 30, so that the fan control circuit 20 adjusts the rotation speed of the fan module 30 according to the wind speed setting signal, thereby achieving speed regulation.

[0065] In one embodiment, the trigger circuit 40 further includes:

[0066] Steering setting circuit 42, the output terminal of which is connected to the fan control circuit 20, is used to set the steering direction of the fan module 30 and output a corresponding steering setting signal;

[0067] The fan control circuit 20 is also used to adjust the direction of the fan module 30 according to the direction setting signal.

[0068] In this embodiment, the steering setting circuit 42 can be implemented using any steering setting circuit 42 that can set the airflow direction of the fan module 30, such as a touchpad. It is understood that the steering setting circuit 42 allows the user to set the airflow direction of the fan module 30, so that the fan control circuit 20 adjusts the steering of the fan module 30 according to the steering setting signal, thereby achieving direction adjustment.

[0069] Reference Figure 2 In one embodiment, the smart desktop fan includes:

[0070] The mode setting circuit 50 is connected to the input of the fan control circuit 20. The mode setting circuit 50 is used to set the working mode of the fan module 30 and output the corresponding mode setting signal. The mode setting signal includes normal mode and intelligent mode.

[0071] The fan control circuit 20 is also used to receive the trigger signal triggered by the user and adjust the speed and direction of the fan module 30 when the working mode of the smart desktop fan is determined to be normal mode according to the mode setting signal.

[0072] Alternatively, when the working mode of the smart desktop fan is determined to be smart mode according to the mode setting signal, the speed and direction of the fan module 30 are adjusted according to the human body detection signal.

[0073] In this embodiment, the mode setting circuit 50 can be implemented using any mode setting circuit 50, such as a touchpad. It is understood that the smart desktop fan has a normal mode and a smart mode. In normal mode, the user can manually adjust the wind speed and direction. That is, the fan control circuit 20 adjusts the direction and speed of the fan module 30 only according to the trigger signal. In other words, the user needs to manually adjust the direction and speed of the fan module 30 by triggering the trigger circuit 40. For example, the user slides the touchpad to switch to the default wind speed adjustment mode; sliding left decelerates, and sliding right accelerates. A quick double-tap of the touchpad switches to the direction adjustment mode. The smart desktop fan adjusts the airflow according to the sliding direction. The user can quickly double-tap the touchpad again to switch back to the wind speed adjustment mode. The user can also long-press the right side of the touchpad to activate the oscillation mode, and long-press the right side of the touchpad again to deactivate the oscillation mode. In smart mode, the fan speed can be adjusted by sliding, and the fan can automatically swing according to the direction of human movement so that the airflow is always directed at the user. At the same time, the fan will also intelligently adjust the speed according to the distance between the user and the smart desktop fan to ensure that the same amount of airflow is available no matter how the user moves. The mode setting circuit 50 allows users to select the working mode of the smart desktop fan as needed, which is more convenient.

[0074] Reference Figure 2 In one embodiment, the smart desktop fan further includes:

[0075] Timer 60, the output of which is connected to the fan control circuit 20, is used to set the working time of the fan module 30 and output a corresponding time setting signal;

[0076] The fan control circuit 20 is also used to control the fan module 30 to work according to the trigger signal and the human body detection signal, and to control the fan module 30 to stop working when no human body is detected within the working time corresponding to the time setting signal.

[0077] In this embodiment, the timer 60 can be implemented using a crystal oscillator circuit or a clock chip. It is understood that the timer 60 can set the operating time of the fan module 30 to 30 seconds. That is, when the smart desktop fan is operating in smart mode, if the human body sensor 10 does not detect a human body, the fan module 30 will stop working after 30 seconds, meaning the smart desktop fan enters a sleep state. When the human body sensor 10 detects a human body again, the fan control circuit 20 will control the fan module 30 to operate in the state before sleep, thereby realizing the intelligent on / off of the smart desktop fan to reduce power consumption and save electricity.

[0078] In practical applications, if the battery 80 continues to supply power to the fan control circuit 20, the human body sensor 10, and the fan module 30 when the battery voltage is too low, it will cause the battery 80 to be over-discharged and easily damaged. Therefore, in this embodiment, a battery voltage detection circuit 70 is provided to detect the voltage of the battery 80 and realize real-time monitoring of the voltage of the battery 80 to protect the battery 80.

[0079] Reference Figure 2 In one embodiment, the smart desktop fan includes:

[0080] The battery 80 has its output terminals connected to the fan control circuit 20, the human body sensor 10, and the fan module 30, respectively. The battery 80 is used to supply power to the fan control circuit 20, the human body sensor 10, and the fan module 30.

[0081] A battery voltage detection circuit 70 is provided, wherein the detection terminal of the battery voltage detection circuit 70 is connected to the battery 80, and the output terminal of the battery voltage detection circuit 70 is connected to the fan control circuit 20. The battery voltage detection circuit 70 is used to detect the voltage of the battery 80 and output a corresponding battery voltage detection signal.

[0082] The fan control circuit 20 is also used to control the battery 80 to stop supplying power to the fan control circuit 20, the human body sensor 10 and the fan module 30 when the voltage value corresponding to the battery voltage detection signal is lower than the preset voltage value.

[0083] In this embodiment, the battery voltage detection circuit 70 can be implemented using any battery voltage detection circuit 70 capable of detecting the voltage of the battery 80, such as a voltage divider resistor. The battery 80 can be implemented using any battery 80 capable of powering the fan control circuit 20, the human body sensor 10, and the fan module 30, such as a lithium battery. It is understood that the battery voltage detection circuit 70 can detect the voltage of the battery 80 and output a corresponding battery voltage detection signal. When the voltage value corresponding to the battery voltage detection signal is lower than a preset voltage value, the fan control circuit 20 controls the battery 80 to stop supplying power to the fan control circuit 20, the human body sensor 10, and the fan module 30, to prevent the battery 80 from being over-discharged, thereby protecting the battery 80 and extending its service life.

[0084] Reference Figure 2 In one embodiment, the fan control circuit 20 includes:

[0085] The main controller 21 is connected to the human body sensor 10 at its input terminal. The main controller 21 is used to output a corresponding fan control signal based on the human body detection signal.

[0086] The drive circuit 22 has its input terminal connected to the main controller 21 and its output terminal connected to the fan module 30. The drive circuit 22 is used to drive the fan module 30 to work when it receives the fan control signal, so as to adjust the speed and direction of the fan module 30.

[0087] In this embodiment, the driving circuit 22 can be implemented using any fan-driving circuit, such as a transistor or MOSFET. The main controller 21 can be implemented using an MCU, DSP (Digital Signal Processor), FPGA (Field Programmable Gate Array), or SOC (System-on-Chip). In this embodiment, the driving circuit 22 and the main controller 21 are separate, which is lower in cost and provides better heat dissipation compared to the fan control circuit 20 that integrates the driving circuit 22 and the main controller 21. It is understood that the main controller 21 outputs fan control signals to the driving circuit 22 based on trigger signals and human detection signals, driving the fan module 30 to work and adjust its speed and direction so that the smart desktop fan provides the user with the required airflow force and direction to meet the user's needs.

[0088] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A smart desktop fan, characterized in that, The smart desktop fan includes: Fan module; The human body sensor includes multiple sets of through-beam switches. Each set of through-beam switches includes a photoelectric emitter and a photoelectric receiver. The controlled end of each photoelectric emitter is connected to a fan control circuit, and the output end of each photoelectric receiver is connected to the input end of the fan control circuit. The human body sensor is used to output a corresponding human body detection signal based on the output signal of the photoelectric receiver in each set of through-beam switches. A fan control circuit, wherein the input terminal of the fan control circuit is connected to the human body sensor, and the control terminal of the fan control circuit is connected to the fan module, and the fan control circuit is used to adjust the speed and direction of the fan module according to the human body detection signal; The photoelectric emitting tube is used to emit infrared light, and the photoelectric receiving tube is used to receive the reflected light of the infrared light, so that the fan control circuit can determine the distance, orientation and number of people relative to the smart desktop fan based on the intensity of the reflected light. The human body sensor is also used to detect the overlap ratio of human bodies. When the overlap ratio is less than 30%, the fan control circuit adjusts the speed of the fan module according to the distance of the crowd relative to the smart desktop fan. When the overlap ratio is between 30% and 70%, the fan control circuit adjusts the speed of the fan module according to the distance of the obscured human body relative to the smart desktop fan. When the overlap ratio is greater than 70%, the fan control circuit adjusts the speed of the fan module according to the distance of the crowd relative to the smart desktop fan.

2. The intelligent desktop fan as described in claim 1, characterized in that, The smart desktop fan includes: A trigger circuit, the output of which is connected to the fan control circuit, is used to output a corresponding trigger signal when triggered. The fan control circuit is also used to adjust the speed and direction of the fan module according to the trigger signal.

3. The intelligent desktop fan as described in claim 2, characterized in that, The trigger circuit includes: A wind speed setting circuit, the output of which is connected to the fan control circuit, is used to set the wind speed of the fan module and output a corresponding wind speed setting signal. The fan control circuit is also used to adjust the speed of the fan module according to the wind speed setting signal.

4. The intelligent desktop fan as described in claim 2, characterized in that, The trigger circuit further includes: A steering setting circuit, the output of which is connected to the fan control circuit, is used to set the steering direction of the fan module and output a corresponding steering setting signal. The fan control circuit is also used to adjust the direction of the fan module according to the direction setting signal.

5. The intelligent desktop fan as described in claim 2, characterized in that, The smart desktop fan includes: A mode setting circuit is provided, the output of which is connected to the fan control circuit. The mode setting circuit is used to set the working mode of the fan module and output a corresponding mode setting signal, which includes a normal mode and an intelligent mode. The fan control circuit is also used to receive the trigger signal triggered by the user and adjust the speed and direction of the fan module when the working mode of the smart desktop fan is determined to be normal mode according to the mode setting signal. Alternatively, when the working mode of the smart desktop fan is determined to be smart mode according to the mode setting signal, the speed and direction of the fan module are adjusted according to the human body detection signal.

6. The intelligent desktop fan as described in claim 5, characterized in that, The smart desktop fan also includes: A timer, the output of which is connected to the fan control circuit, is used to set the working time of the fan module and output a corresponding time setting signal; The fan control circuit is also used to control the fan module to work according to the trigger signal and the human body detection signal, and to control the fan module to stop working when no human body is detected within the working time corresponding to the time setting signal.

7. The intelligent desktop fan as described in claim 1, characterized in that, The smart desktop fan includes: The battery has its output terminals connected to the fan control circuit, the human body sensor, and the fan module, respectively, and is used to power the fan control circuit, the human body sensor, and the fan module. A battery voltage detection circuit is provided, wherein the detection terminal of the battery voltage detection circuit is connected to the battery, and the output terminal of the battery voltage detection circuit is connected to the fan control circuit. The battery voltage detection circuit is used to detect the voltage of the battery and output a corresponding battery voltage detection signal. The fan control circuit is also used to control the battery to stop supplying power to the fan control circuit, the human body sensor and the fan module when the voltage value corresponding to the battery voltage detection signal is lower than a preset voltage value.

8. The intelligent desktop fan as described in claim 1, characterized in that, The fan control circuit includes: The main controller has its input terminal connected to the human body sensor, and the main controller is used to output corresponding fan control signals based on the human body detection signal; The drive circuit has its input terminal connected to the main controller and its output terminal connected to the fan module. The drive circuit is used to drive the fan module to work when it receives the fan control signal, so as to adjust the speed and direction of the fan module.

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