A fan automatic start-stop control system

Abstract

The utility model relates to a kind of fan automatic start-stop control system, through the synergic cooperation of temperature acquisition module and control module, system can obtain ambient temperature data in real time by temperature acquisition module, and by control module, the comparison and judgment of obtaining ambient temperature data and preset threshold value are carried out, to automatically start fan when ambient temperature reaches start threshold value, automatically close fan when temperature falls back to stop threshold value.Changed the operation mode of traditional fan relying on manual intervention completely, realized the real intelligent temperature control, significantly improved the convenience and comfort of use, while effectively avoiding energy waste.

Description

Technical Field

[0001] This utility model relates to the technical field of fan control, specifically to an automatic fan start-stop control system. Background Technology

[0002] Fans, as a common cooling device, are widely used in homes, offices, and various public places. Traditional fan control relies heavily on manual operation by the user, such as manually turning them on when it's hot and manually turning them off when the temperature drops or when leaving the room. While this method is straightforward, it presents significant inconvenience and energy waste.

[0003] With technological advancements, some fans with simple automatic control functions have emerged, such as timer-based fans that can automatically shut off after a predetermined running time. However, whether manually switched on or off, the fan's operation remains disconnected from the real-time ambient temperature. For instance, when the room temperature rises after the user leaves home, the fan cannot automatically start to maintain a comfortable indoor temperature; conversely, when the temperature drops at night, if the user is asleep or the timer has not yet expired, the fan will continue to run, resulting not only in unnecessary energy consumption but also potentially causing discomfort due to excessive cooling. Utility Model Content

[0004] This invention provides an automatic fan start-stop control system to solve the problem mentioned in the background art that existing fans cannot automatically start and stop according to ambient temperature.

[0005] To solve the above-mentioned technical problems, this utility model provides an automatic fan start-stop control system, comprising: The temperature acquisition module is electrically connected to the control module and is used to acquire the ambient temperature in real time and transmit the acquired temperature data to the control module for processing. The photosensitive sensing module is electrically connected to the control module and is used to detect the ambient light intensity and transmit the collected light intensity data to the control module for processing. The buttons are electrically connected to the control module and are used to switch the control system mode and adjust the temperature parameters through user manual operation signals. The control module is used to issue preset control commands based on the input temperature data, light intensity data, and manual operation signals; The indicator light module is electrically connected to the control module and is used to turn the indicator lights on or off according to the control commands issued by the control module. The display module, electrically connected to the control module, is used to display the current ambient temperature and the set temperature parameters in real time. The power supply module is used to provide power to the temperature acquisition module, the photosensitive sensing module, the control module, the indicator module, and the display module.

[0006] In one embodiment, the control module includes a timing unit for automatically controlling the fan's running time.

[0007] In one embodiment, the control module further includes a temperature parameter adjustment unit for adjusting the temperature parameter according to the button signal.

[0008] In one embodiment, the control module further includes an operating mode switching unit, used to switch between automatic and manual modes based on the light intensity after the fan is turned on.

[0009] In one embodiment, the control module further includes a display module brightness adjustment unit for adjusting the brightness of the display module according to the ambient light intensity.

[0010] In one embodiment, the automatic fan start / stop control system further includes a switch module electrically connected to the control module for controlling the fan power supply to be turned on or off.

[0011] In one embodiment, the automatic fan start / stop control system further includes an infrared receiver head electrically connected to the control module. The infrared receiver head is used to receive infrared signals emitted by an infrared remote controller, allowing users to remotely control the system via the infrared remote controller.

[0012] In one embodiment, the power module includes a step-down unit for converting initial power into DC power at a preset voltage value.

[0013] In one embodiment, the control module includes either a microcontroller or an MCU module.

[0014] In one embodiment, the chip model of the temperature acquisition module is DS18B20.

[0015] The aforementioned automatic fan start-stop control system, through the coordinated operation of a temperature acquisition module and a control module, enables the system to acquire ambient temperature data in real time. The control module then compares and judges this data with preset thresholds, automatically turning on the fan when the ambient temperature reaches the start threshold and automatically turning off the fan when the temperature drops back to the stop threshold. This completely changes the traditional fan operation mode that relies on manual intervention, achieving true intelligent temperature control, significantly improving ease of use and comfort, while effectively avoiding energy waste. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the circuit structure of an automatic fan start-stop control system according to the present invention. Figure 2This is a schematic diagram of the circuit structure of the control module of the automatic fan start-stop control system of this utility model. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediary component present. Conversely, when a component is said to be "directly" connected to another component, there is no intermediary component.

[0019] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] like Figure 1 As shown, an automatic fan start / stop control system includes: Temperature acquisition module 1 is electrically connected to control module 4 and is used to acquire ambient temperature in real time and transmit the acquired temperature data to the control module for processing. The photosensitive sensing module 2 is electrically connected to the control module 4 and is used to detect the ambient light intensity and transmit the collected light intensity data to the control module for processing. Button 3 is electrically connected to the control module and is used to switch the control system mode and adjust the temperature parameters through user manual operation signals. Control module 4 is used to issue preset control commands based on the input temperature data, light intensity data, and manual operation signals; Indicator module 5 is electrically connected to the control module and is used to turn the indicator lights on or off according to the control commands issued by the control module. Display module 6 is electrically connected to the control module and is used to display the current ambient temperature and the set temperature parameters in real time. The power supply module 7 is used to provide power to the temperature acquisition module, the photosensitive sensing module, the control module, the indicator module, and the display module.

[0021] like Figure 2 As shown, the control module 4 includes a timing unit 41, which is used to automatically control the running time of the fan; the automatic fan start-stop control system also includes a switch module 8, which is electrically connected to the control module 4 and is used to control the power supply of the fan to be turned on or off.

[0022] Temperature acquisition module 1, such as a thermistor or digital temperature sensor DS18B20, continuously monitors the temperature of the surrounding air and converts the sensed ambient temperature into an electrical signal that the control module 4 can recognize, such as voltage changes or digital signals. The photosensitive sensing module 2, for example, is a digital ambient light sensor model BH1750, whose spectral characteristics are close to those of the human eye, and can directly output illuminance values ​​(unit: lux); and send the illuminance values ​​to the control module 4. Button 3 includes system buttons and temperature adjustment buttons; The system button is operated as follows: Clicking the system button for the first time will turn on the fan and display the current ambient temperature on display module 6; Click the system button a second time: Switch the system to timer mode, start timer unit 41, the timer duration is 2 hours, in timer mode the fan will run for 2 hours and then stop automatically; Click the system button a third time: Switch the system to timed mode, with a timer duration of 4 hours. The fan will run for 4 hours and then automatically stop.

[0023] Click the system button a fourth time: Switch the system to timed mode, with a timer duration of 6 hours. The fan will run for 6 hours and then automatically stop.

[0024] Click the system button a fifth time: turn off the fan and stop the system.

[0025] In one embodiment, the control module 4 further includes a temperature parameter adjustment unit 42, used to adjust the temperature parameter according to the button signal.

[0026] The operation method of the temperature adjustment button is as follows: Double-clicking the temperature adjustment button for the first time: Display module 6 starts flashing, indicating that the system has entered the cold temperature adjustment mode. At this time, the user can adjust the cold temperature parameter through other operations (such as long-pressing the temperature adjustment button); Double-clicking the temperature adjustment button a second time: Display module 6 starts flashing again, indicating that the system has entered the temperature adjustment mode, and the user can adjust the temperature parameters.

[0027] To adjust the temperature parameter, press and hold the temperature adjustment button. The first press and hold decreases the temperature by 1 degree Celsius per second. Users can continue pressing and holding the button until the desired temperature is reached.

[0028] A second long press: The temperature parameter increases by 1 degree per second. Similarly, users can long press the temperature adjustment button to increase the temperature.

[0029] If no temperature adjustment button is pressed within a preset time, the display module 6 will flash three times and then automatically save the currently set temperature parameters.

[0030] Control module 4 is used to issue preset control commands based on input temperature data, light intensity data, and manual operation signals. Control module 4 includes either a microcontroller or an MCU module, where the microcontroller model can be STM32 or 51. It receives real-time temperature data from temperature acquisition module 1 and light intensity data from photosensitive sensor module 2, as well as control signals from button 3, to adjust temperature parameters and fan status.

[0031] In one embodiment, the control module 4 further includes an operating mode switching unit 43, which is used to switch between automatic mode and manual mode according to the light intensity after the fan is turned on.

[0032] The system needs to meet two conditions to enter automatic mode: 1. The fan is on, that is, the system is in the fan-on mode after the first click of the system button; 2. The ambient light intensity is detected by the photosensitive sensor module 2. When the light intensity is lower than the set threshold, it is determined that the environment is very dark.

[0033] When both of the above conditions are met simultaneously, the green light on indicator module 5 will illuminate, indicating that the system has entered automatic mode. In automatic mode, the system will automatically control the fan's start and stop based on changes in ambient temperature. If either of the two conditions for activating automatic mode is not met, the system will automatically exit automatic mode, and the green light on indicator module 5 will turn off. At this time, fan control will revert to the previous manual or timed mode.

[0034] In automatic mode, control module 4 will compare the current ambient temperature with the set cold and hot temperature parameters in real time: when the current ambient temperature is lower than the set cold temperature, control module 4 sends a control signal to cut off the fan power through switch module 8, so that the fan stops running; when the current ambient temperature is higher than the hot temperature, control module 4 sends a control signal to turn on the fan power through switch module 8, so that the fan starts automatically.

[0035] In this way, an automatic fan start-stop control system, through the coordinated operation of temperature acquisition module 1 and control module 4, enables the system to acquire ambient temperature data in real time via temperature acquisition module 1. Control module 4 then compares and judges the acquired ambient temperature data with preset thresholds, automatically turning on the fan when the ambient temperature reaches the start threshold and automatically turning off the fan when the temperature drops back to the stop threshold. This completely changes the traditional fan operation mode that relies on manual intervention, achieving true intelligent temperature control, significantly improving ease of use and comfort, while effectively avoiding energy waste.

[0036] In one embodiment, the control module 4 further includes a display module brightness adjustment unit 44, used to adjust the brightness of the display module 6 according to the ambient light intensity.

[0037] The display module brightness adjustment unit 44 automatically adjusts the brightness of the display module 6 based on the light intensity detected by the photosensitive sensor module 2 to improve display effect and user experience. When the photosensitive sensor module 2 detects that the ambient light reaches a first preset threshold, indicating daytime, the display module brightness adjustment unit 44 receives a first control signal and automatically brightens the display module 6 to the first preset brightness value, ensuring clear display of temperature information even in bright light environments. When the photosensitive sensor module 2 detects that the ambient light is weak, reaching a second preset threshold, indicating nighttime, the display module brightness adjustment unit 44 receives a second control signal and automatically dims the display module 6 to the second preset brightness value, avoiding excessive light interference with the user at night. This provides a comfortable user experience.

[0038] In one embodiment, the automatic fan start / stop control system further includes an infrared receiver 9, which is electrically connected to the control module 4. The infrared receiver 9 is used to receive infrared signals emitted by an infrared remote controller, so that users can remotely control the system through the infrared remote controller.

[0039] Infrared receiver 9 can be either a VS1838B or a TL1838. For example, when a user picks up the infrared remote control and presses the "Temperature+" button, the encoding chip inside the remote control generates a string of binary code representing the "Temperature+" command. This code drives an infrared LED to flash at a frequency of 38kHz (i.e., high-frequency switching), modulating the digital code onto an infrared light wave for transmission. The infrared receiver 9, mounted on the fan control board, detects this 38kHz infrared pulse signal. Its internal circuitry demodulates the signal, filtering out the 38kHz carrier wave and reconstructing the original digital code waveform. This clear digital signal is then output to the corresponding pin of control module 4. The interrupt program of control module 4 responds immediately, capturing this signal waveform. The decoding program begins working, ultimately assembling a complete button code. Control module 4 compares this code with the "command library" stored in the program and finds that it matches the "Temperature+" command. Control module 4 then executes the operation: increasing the internally stored "start temperature threshold" by 1℃ (e.g., from 27℃ to 28℃). Users can control the fan from a distance of several meters without having to get up and walk to it, greatly improving convenience.

[0040] In one embodiment, the power module 7 includes a step-down unit for converting the initial power supply into DC power with a preset voltage value.

[0041] The step-down unit includes a first step-down unit and a second step-down unit. The first step-down unit converts 220V AC power to 12V DC power through an external or internal power adapter. The second step-down unit includes a switching regulator (such as MP1584) and a linear regulator (such as AMS1117-3.3). The switching regulator efficiently converts 12V to 5V to power the display module and the switching module 8. The linear regulator further converts the voltage from 5V to 3.3V to power the temperature acquisition module 1, the photosensitive sensor module 2, the control module 4, and the indicator light module 5.

[0042] The options described in the above method embodiments are also applicable to this embodiment, and will not be detailed here. The remaining contents of this utility model embodiment can be referred to the contents of the above method embodiments, and will not be repeated in this embodiment.

[0043] 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.

[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, 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 automatic start / stop control system for a fan, characterized in that: include: The temperature acquisition module is electrically connected to the control module and is used to acquire the ambient temperature in real time and transmit the acquired temperature data to the control module for processing. The photosensitive sensing module is electrically connected to the control module and is used to detect the ambient light intensity and transmit the collected light intensity data to the control module for processing. The buttons are electrically connected to the control module and are used to switch the control system mode and adjust the temperature parameters through user manual operation signals. The control module is used to issue preset control commands based on the input temperature data, light intensity data, and manual operation signals; The indicator light module is electrically connected to the control module and is used to turn the indicator lights on or off according to the control commands issued by the control module. The display module, electrically connected to the control module, is used to display the current ambient temperature and the set temperature parameters in real time. The power supply module is used to provide power to the temperature acquisition module, the photosensitive sensing module, the control module, the indicator module, and the display module.

2. The automatic start / stop control system for a fan according to claim 1, characterized in that: The control module includes a timing unit, which is used to automatically control the running time of the fan.

3. The automatic start / stop control system for a fan according to claim 1, characterized in that: The control module also includes a temperature parameter adjustment unit, used to adjust the temperature parameter according to the button signal.

4. The automatic start / stop control system for a fan according to claim 1, characterized in that: The control module also includes an operating mode switching unit, which is used to switch between automatic and manual modes according to the light intensity after the fan is turned on.

5. The automatic start / stop control system for a fan according to claim 1, characterized in that: The control module also includes a display module brightness adjustment unit, used to adjust the brightness of the display module according to the ambient light intensity.

6. The automatic fan start / stop control system according to claim 1, characterized in that: The automatic fan start / stop control system also includes a switch module, which is electrically connected to the control module and is used to control the fan power supply to be turned on or off.

7. The automatic start / stop control system for a fan according to claim 1, characterized in that: The automatic fan start / stop control system also includes an infrared receiver head, which is electrically connected to the control module. The infrared receiver head is used to receive infrared signals emitted by the infrared remote controller, allowing users to remotely control the system using the infrared remote controller.

8. The automatic start / stop control system for a fan according to claim 1, characterized in that: The power module includes a step-down unit, which is used to convert the initial power supply into DC power with a preset voltage value.

9. The automatic start / stop control system for a fan according to claim 1, characterized in that: The control module includes either a single-chip microcomputer or an MCU module.

10. The automatic start / stop control system for a fan according to claim 1, characterized in that: The temperature acquisition module uses a DS18B20 chip.

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