An air purification filter core life warning and replacement auxiliary device based on an internet of things

Abstract

This invention discloses an IoT-based air purifier filter lifespan warning and replacement assistance device, relating to the field of air purification equipment technology. It includes an air purifier body with an air outlet grille. A purification filter body is movably mounted on the back of the air purifier body, and a pre-filter is attached to the back of the purification filter body. A retainer is snapped onto the air purifier body, contacting the pre-filter. A mounting base with a positioning mechanism is provided on the air outlet grille. This invention employs a multi-parameter weighted fusion detection method based on wind speed, particulate matter, and operating time to simultaneously quantify the physical blockage degree and filtration efficiency decay of the filter. This solves the problems of traditional timing modes, which do not consider actual operating conditions and easily lead to premature filter failure or excessive replacement, and traditional differential pressure detection, which only reflects blockage and cannot detect filtration efficiency. This significantly improves the comprehensiveness and accuracy of filter lifespan assessment.

Description

Technical Field

[0001] This invention relates to the field of air purification equipment technology, and more specifically, to an Internet of Things-based air purification filter life warning and replacement auxiliary device. Background Technology

[0002] Air purifier filters are the core filtration elements of various air purification devices. Based on filtration precision, they can be categorized into pre-filters, medium-efficiency filters, and high-efficiency filters. Some products incorporate functional structures such as activated carbon and antibacterial coatings. They can effectively intercept pollutants such as dust, fine particulate matter, pollen, and microorganisms in the air, while also adsorbing odors and harmful gaseous substances. Widely used in household air purifiers, fresh air systems, vehicle air conditioners, and industrial applications, they are crucial consumables for ensuring air cleanliness and require regular cleaning or replacement.

[0003] Currently, there are two main methods for determining the lifespan of air purifier filters: timing and differential pressure detection. Timing mode triggers a replacement reminder based on accumulated runtime, but it doesn't consider ambient air quality and usage intensity, easily leading to premature filter failure or excessive replacement. Differential pressure detection judges the degree of blockage by the pressure difference across the filter, but it only reflects physical blockage and cannot detect filtration efficiency degradation. Furthermore, it requires pre-installation at the factory, resulting in higher costs and hindering its widespread adoption in low- to mid-range products. Additionally, existing air purifier filters are generally fixed during installation using side rubber seals or by being squeezed and secured by the outer pre-filter and casing, which can cause wobbling during use.

[0004] Therefore, based on the above, the inventor, drawing on years of experience in design, development and actual manufacturing in the relevant industry, has researched and improved the existing structure and its shortcomings, and provides an Internet of Things-based air purifier filter life warning and replacement assistance device, in order to achieve a more practical value. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide an air purifier filter life warning and replacement assistance device based on the Internet of Things, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an air purifier filter life warning and replacement auxiliary device based on the Internet of Things, comprising an air purifier body, an air outlet grille on the air purifier body, a purification filter body movably mounted on the back side of the air purifier body, a pre-filter attached to the back side of the purification filter body, a retaining cover snapped onto the air purifier body, the retaining cover contacting the pre-filter, a mounting base on the air outlet grille, a positioning mechanism on the mounting base, a limit mechanism mounted on the positioning mechanism, and a monitoring mechanism mounted on the limit mechanism, the monitoring mechanism including... The device includes a monitoring base mounted on the mounting base. A positioning base is fixedly mounted in the middle of the monitoring base. A ventilation hole is provided in the middle of the positioning base. A wind speed sensor is fixedly mounted on the bottom side of the positioning base directly below the ventilation hole. A particulate matter sensor is fixedly mounted on one end of the bottom side of the positioning base, and the particulate matter sensor is on the same side as the wind speed sensor. A temperature and humidity sensor is fixedly mounted on the other end of the bottom side of the positioning base, and the temperature and humidity sensor is on the other side of the wind speed sensor. The wind speed sensor, particulate matter sensor, and temperature and humidity sensor are all compatible with the air purifier body. The monitoring base is equipped with an early warning mechanism, which is used to provide intuitive early warnings and reminders to the monitoring unit when it is in different monitoring states. The air purifier body is equipped with a locking mechanism for assisting in the positioning of the purification filter body during installation. The locking mechanism includes a collection slot on the air purifier body, a locking block slidably installed inside the collection slot, a locking slot on the purification filter body, the locking block being inserted into the locking slot, an unlocking block slidably installed on the locking slot, the bottom side of the locking block contacting the top side of the unlocking block, and an unlocking mechanism on the purification filter body that contacts the unlocking block.

[0007] As a preferred technical solution, the positioning mechanism includes two transmission L-shaped rods mounted on the mounting base. Each of the two transmission L-shaped rods has an L-shaped locking rod fixedly mounted on its outer end, and the hook ends of the two L-shaped locking rods are hooked onto the grille of the air outlet grille.

[0008] As a preferred technical solution, two fixing blocks are fixedly installed inside the mounting base, and bidirectional positive and negative threaded screws are rotatably installed on the two fixing blocks. Two transmission L-shaped rods are respectively screwed to the two ends of the bidirectional positive and negative threaded screws.

[0009] As a preferred technical solution, a worm gear is rotatably mounted inside the mounting base, and a worm wheel meshes on the worm gear. The worm wheel is fixedly sleeved in the middle position of the bidirectional positive and negative threaded screw.

[0010] As a preferred technical solution, the limiting mechanism includes a storage groove formed on the upper side of the mounting base, an extrusion plate is slidably installed inside the storage groove, a buffer pad is fixedly bonded to one side of the extrusion plate, and a locking screw is threaded onto the mounting base, with the inner end of the locking screw fixedly installed on the other side of the extrusion plate.

[0011] As a preferred technical solution, the monitoring mechanism also includes a microcontroller, which is communicatively connected to the wind speed sensor, particulate matter sensor and temperature and humidity sensor respectively.

[0012] As a preferred technical solution, the warning mechanism includes a multi-color LED indicator light installed on the upper side of the monitoring base. The multi-color LED indicator light has three sets of lights. A buzzer is fixedly installed on the monitoring base. The buzzer is attached to the multi-color LED indicator light. Both the multi-color LED indicator light and the buzzer are communicatively connected to the microcontroller.

[0013] As a preferred technical solution, a first spring is fixedly installed on the top inner wall of the receiving groove, and the other end of the first spring is fixedly installed on the upper side of the locking block.

[0014] As a preferred technical solution, a second spring is fixedly installed on the bottom inner wall of the locking slot, and the upper end of the second spring is fixedly installed on the bottom side of the unlocking block.

[0015] As a preferred technical solution, the unlocking mechanism includes an unlocking groove formed on the purification filter body, a third spring fixedly installed on the inner wall of the unlocking groove, an unlocking block fixedly installed on the other end of the third spring, a retaining groove formed on one side of the unlocking block, and the unlocking block inserted into the retaining groove.

[0016] The technical effects and advantages of this invention are as follows: This invention employs a multi-parameter weighted fusion detection method that combines wind speed, particulate matter, and operating time, which can simultaneously quantify the degree of physical blockage and filtration efficiency decline of the filter element. This solves the problems of traditional timing modes, which do not take into account actual operating conditions and are prone to premature filter element failure or excessive replacement, and traditional differential pressure detection, which can only reflect blockage and cannot detect filtration efficiency. This invention significantly improves the comprehensiveness and accuracy of filter element life judgment. This invention, by providing a matching elastic adaptive locking and positioning mechanism, can automatically lock and fix the filter element after it is installed in place. This solves the problem that traditional filter elements, which rely solely on the squeezing of the sealing ring and the limiting fixation of the outer cover, are prone to shaking and displacement during operation. It effectively improves the sealing performance and operational stability of the filter element installation and avoids the reduction in purification effect caused by air leakage in the air duct. This invention, through its built-in dynamic temperature and humidity compensation algorithm and multiple data filtering mechanisms, can perform environmental calibration and noise removal on the monitoring data, completely solving the problems of sensor detection distortion and large lifespan judgment errors caused by temperature and humidity fluctuations and instantaneous airflow interference, and further ensuring the stability and accuracy of filter lifespan monitoring data. This invention adopts an independent external mounting structure design, which eliminates the need for hardware modification and software adaptation of existing air purifiers. It is easy to install and has low modification costs. It solves the problem that traditional differential pressure detection requires factory pre-installation, which is costly and difficult to popularize in low-end and mid-range products. It is compatible with various existing air purifiers, with a wider range of applications and greater popularity. This invention builds a cloud-based AI algorithm and mobile terminal one-stop service system based on the Internet of Things architecture. It can realize personalized optimization and continuous iteration of algorithms based on the user's usage environment. At the same time, it provides a closed-loop service for the whole process, including graded early warning, filter selection, and replacement guidance. It solves the problems of lack of professional guidance and high threshold of replacement operation in traditional filter maintenance, and greatly improves the convenience of user maintenance and user experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the unfolded structure of the present invention; Figure 4 This is a schematic diagram of the connection structure of the mounting base, the transmission L-shaped rod, and the monitoring base of the present invention; Figure 5 This is a cross-sectional view of the mounting base and monitoring base of the present invention; Figure 6 This is a schematic diagram of the connection structure of the mounting base, the extrusion plate, and the monitoring base of the present invention; Figure 7 This is a schematic diagram of the connection structure of the worm gear, worm wheel, and transmission L-shaped rod of the present invention; Figure 8 This is a schematic diagram of the connection structure between the locking block and the unlocking block of the present invention; Figure 9 This is a schematic diagram of the connection structure of the locking block, unlocking block, and unlocking lever of the present invention.

[0018] The attached figures are labeled as follows: 100, Air purifier body; 200, Air outlet grille; 300, Purification filter body; 400, Pre-filter; 500, Cover; 600, Mounting base; 700, Transmission L-shaped rod; 701, L-shaped locking rod; 702, Fixing block; 703, Bidirectional positive and negative threaded screw; 704, Worm gear; 705, Worm; 800, Storage slot; 801, Extrusion plate; 802, Buffer pad; 803, Locking screw; 900, Monitoring base; 901, Positioning base; 9 02. Ventilation vent; 903. Wind speed sensor; 904. Particulate matter sensor; 905. Temperature and humidity sensor; 906. Microcontroller; 1000. Multi-color LED indicator; 1001. Buzzer; 1100. Item receiving tray; 1101. Locking block; 1102. Locking slot; 1103. Unlocking block; 1104. First spring; 1105. Second spring; 1200. Unlocking slot; 1201. Third spring; 1202. Unlocking lever; 1203. Retention slot. Detailed Implementation

[0019] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] As attached Figure 1 To be continued Figure 9The device shown is an IoT-based air purifier filter lifespan warning and replacement assistance system, comprising an air purifier body 100. Using the air purifier body 100 as the carrier, this device adopts an independent external mounting structure design, requiring no hardware modification or software rewriting of existing air purifiers, making it highly adaptable. The device integrates a multi-parameter intelligent monitoring mechanism, an environmental data calibration mechanism, a multi-level audible and visual warning mechanism, a worm gear adjustable positioning and installation mechanism, an elastic buffer limit fixing mechanism, a filter locking and positioning mechanism, a quick unlocking and replacement mechanism, an IoT dual-mode communication mechanism, a low-power power supply mechanism, a cloud-based intelligent algorithm optimization mechanism, and a mobile one-stop service mechanism. It integrates accurate data collection, multi-source data fusion calibration, AI-based accurate lifespan prediction, hierarchical intelligent warning, convenient disassembly and positioning, error-proof installation protection, cloud-based iterative optimization, and replacement selection guidance, forming a complete closed-loop system for filter lifespan monitoring and replacement assistance. This device specifically addresses the industry pain points of traditional air purifiers, such as relying on manual experience and single usage time for filter life estimation, limited data monitoring dimensions, large environmental interference errors, lack of standardized graded early warning, easy loosening and misalignment of filter installation, cumbersome disassembly and assembly, lack of positive and negative error prevention structures, lack of intelligent algorithm calibration and optimization, and lack of one-stop replacement and maintenance guidance. It effectively improves the accuracy of filter life monitoring, filter installation sealing, and the convenience of replacement and maintenance. Relying on IoT technology, it enables continuous algorithm iteration and personalized adaptation, comprehensively ensuring the long-term stable purification operation of the air purifier.

[0021] To address the shortcomings of traditional air purifier filter lifespan monitoring methods, which rely solely on usage time to estimate lifespan and fail to quantify the degree of physical clogging and filtration efficiency decline, resulting in biased, inaccurate, and erroneous lifespan assessments, this device incorporates a high-precision, multi-parameter integrated intelligent monitoring mechanism. A mounting base 600 is installed on the air outlet grille 200 of the air purifier body 100. A monitoring base 900 is fixedly mounted on the mounting base 600, and a positioning seat 901 is fixedly mounted in the center of the monitoring base 900. A ventilation hole 902 is provided in the center of the positioning seat 901 to ensure normal airflow and prevent obstruction of the airflow from affecting the accuracy of the monitoring. A wind speed sensor 903 is fixedly mounted on the bottom side of the positioning base 901, corresponding to the ventilation hole 902. The wind speed sensor 903 uses a thermal wind speed sensing chip, with a measurement range of 0-15m / s and a detection accuracy of ±3%. The wind-sensing surface faces the air outlet direction, which can monitor the changes in air outlet wind speed and air volume in real time. It accurately reflects the degree of physical blockage of the filter element through the wind speed attenuation. The more severe the filter element blockage, the lower the air outlet wind speed will be when the fan speed remains constant. A particulate matter sensor 904 is mounted on one end of the bottom side of the positioning base 901. The particulate matter sensor 904 uses the laser scattering detection principle, with a detection range of 0-1000μg / m³ and a detection accuracy of ±10%. It is used to detect the PM2.5 / PM10 particulate matter concentration at the air outlet in real time, quantifying the attenuation of the filter element's HEPA layer filtration efficiency. When the filter element fails, the particulate matter concentration at the air outlet will increase significantly. The other end of the bottom of the positioning base 901 is equipped with a temperature and humidity sensor 905, which uses a high-precision digital sensor chip. The temperature measurement range is -40℃ to 85℃ with an accuracy of ±0.3℃, and the humidity measurement range is 0 to 100%RH with an accuracy of ±2%RH, providing an environmental calibration basis for monitoring data. Simultaneously, the monitoring base 900 incorporates a low-power 32-bit ARM Cortex-M series microcontroller 906 with a main frequency of 48MHz, 128KB Flash and 32KB RAM. It communicates electrically with the three types of sensors, responsible for sensor data acquisition, analog-to-digital conversion, data preprocessing, and local preliminary analysis. It also coordinates the data interaction between the early warning components and the communication module, achieving comprehensive and high-precision quantitative monitoring of the filter element's operating status. The sensor unit housing is made of ABS engineering plastic, with a mesh protective cover on the air outlet side to prevent foreign objects from entering. A standard 1 / 4-inch screw hole is pre-drilled at the bottom of the housing for mounting with an adjustable bracket.

[0022] To address the issues of traditional filter monitoring equipment lacking environmental compensation and data optimization mechanisms, where temperature and humidity fluctuations easily interfere with sensor detection accuracy, low temperatures cause inaccurate wind speed readings, high humidity leads to distorted data due to particulate matter absorbing moisture and increasing weight, and instantaneous airflow fluctuations, particulate matter spikes, and equipment interference can easily cause misjudgments, ultimately resulting in inaccurate filter life assessments, this equipment incorporates a multi-dimensional data preprocessing and dynamic environmental calibration structure. This device relies on an independent temperature and humidity sensor 905 to collect ambient temperature and humidity data in real time, and establishes a dedicated compensation algorithm model to accurately correct the core monitoring data: in low temperature environments (temperature < 15℃), wind speed data is compensated by +0.02 / ℃, and in high temperature environments (temperature > 30℃), it is corrected by -0.01 / ℃, with the standard compensation formula being V_corrected = V_raw × (1 - 0.02 × (T - 25)); in high humidity environments (humidity > 70%), particulate matter concentration data is corrected for humidity, with the compensation formula being C_corrected = C_raw × (1 - 0.0015 × (RH - 50)), completely eliminating detection deviations caused by environmental factors. Meanwhile, the device has a built-in data optimization mechanism that uses an N=10 sliding window average filtering algorithm to calculate the mean of continuous sampling data within 10 seconds, filtering out data noise caused by instantaneous airflow fluctuations, opening and closing doors and windows, and occasional large particulate impurities. At the same time, it uses the 3σ Laida criterion to remove abnormal data, eliminating extreme values ​​caused by occasional sensor failures and external interference and replacing them with valid data, which greatly improves the stability and accuracy of monitoring data and provides reliable data support for accurate calculation of filter life.

[0023] To address the shortcomings of traditional air purifiers, which lack precise filter status reminders and cannot differentiate between various filter states such as normal, good, nearing expiration, and critical failure, leading to inaccurate filter replacement timing and potential filter failure due to overuse or premature replacement, this device incorporates a multi-level intelligent audio-visual warning system. A high-brightness RGB multi-color LED indicator 1000 and a matching buzzer 1001 are fixedly mounted on the upper side of the monitoring base 900. Through differentiated combinations of light colors—constant light, slow flashing, and rapid flashing—the system precisely corresponds to the remaining filter lifespan: constant green indicates >50% remaining lifespan, filter is in normal condition; slow green flashing indicates 50%–20% remaining lifespan, filter is in good condition; constant yellow indicates 20%–10% remaining lifespan, filter is nearing expiration; constant red indicates 10%–5% remaining lifespan, immediate replacement recommended; and rapid red flashing indicates <5% remaining lifespan, filter urgently needs replacement. The Buzzer 1001, in conjunction with the light, provides tiered sound alerts. When the remaining lifespan is between 10% and 5%, it is constantly lit in red and will sound three short beeps every 24 hours. When the remaining lifespan is below 5%, it is in the emergency phase with rapid red flashing and will sound five short beeps every 12 hours. This lightweight tiered alert mode effectively warns users while avoiding frequent beeping that could disturb others. Through the dual warning of visual light and tiered sound, users can intuitively and accurately grasp the filter's wear status without the need for terminal devices.

[0024] To address the problems of traditional filter cartridge monitoring equipment lacking a stable and compatible installation structure, resulting in poor installation adaptability, easy positioning misalignment, and easy detachment due to equipment vibration, leading to inaccurate sensor alignment and data acquisition failure, this equipment is equipped with a worm gear driven adjustable positioning and installation mechanism. Two sets of fixing blocks 702 are fixedly mounted inside the mounting base 600. A bidirectional positive and negative threaded screw 703 is rotatably mounted between the two sets of fixing blocks 702. The threads at both ends of the bidirectional positive and negative threaded screw 703 are reversed, and a transmission L-shaped rod 700 is threaded onto each end, enabling bidirectional synchronous opposing opening and closing movement. A worm gear 704 is fixedly sleeved in the middle of the bidirectional positive and negative threaded screw 703. A worm 705, meshing with the worm gear 704, is rotatably mounted inside the mounting base 600, forming a labor-saving and self-locking worm gear transmission structure. After adjustment, it automatically locks to prevent loosening and misalignment. Both sets of L-shaped transmission rods 700 have L-shaped locking rods 701 fixedly mounted on their outer ends. By manually rotating the worm gear 705, the bidirectional positive and negative threaded screw 703 can be driven to rotate, causing the two sets of L-shaped locking rods 701 to open and close synchronously and be stably hooked onto the air outlet grille 200. This design can be adapted to air outlet structures with different grille spacings, is easy to install, has wide adaptability, and is firmly fixed, effectively preventing the monitoring components from shifting during operation.

[0025] To address the issue of slippage and sensor misalignment caused by equipment vibration after the monitoring base is installed without a fixed, buffered structure, thus continuously affecting monitoring accuracy, this equipment incorporates an elastic buffered limiting and fixing mechanism. A storage groove 800 is provided on the upper side of the mounting base 600, inside which a pressing plate 801 is slidably mounted. A flexible buffer pad 802 is bonded to the inner side of the pressing plate 801, preventing wear and deformation of the equipment structure caused by rigid compression. A locking screw 803 is threaded onto the outer side of the mounting base 600, with its inner end fixedly connected to the pressing plate 801. By manually rotating the locking screw 803, the pressing plate 801 can be smoothly moved laterally, working in conjunction with the buffer pad 802 to tightly press and fix the monitoring base 900. Simultaneously, an anti-slip pad is bonded to the inner wall of the limiting groove of the mounting base 600, forming a double limiting and anti-slip structure that effectively counteracts equipment vibration, ensuring long-term accurate alignment and stable operation of the monitoring components.

[0026] To address the problems of traditional filter installation lacking a positioning and locking structure, which leads to filter misalignment, loose fit, and long-term vibration causing filter loosening and displacement, resulting in air leakage, reduced sealing performance, and continuous degradation of filtration efficiency, this device incorporates an elastic adaptive locking and positioning mechanism. A collection tray 1100 is provided on the air purifier body 100. A locking block 1101 is slidably mounted inside the collection tray 1100. A first spring 1104 is fixedly mounted on the inner wall of the top side of the collection tray 1100, and the bottom end of the first spring 1104 is fixedly connected to the locking block 1101. A locking slot 1102 is provided at the corresponding position of the filter element body 300. During the filter element assembly process, the end of the filter element presses against the locking block 1101, causing it to compress the first spring 1104 and retract to avoid it. When the filter element is fully installed, the locking slot 1102 and the locking block 1101 are precisely aligned. The first spring 1104 pushes the locking block 1101 into the locking slot 1102 by relying on its elastic restoring force, thereby realizing the automatic locking and positioning of the filter element. This effectively prevents the filter element from vibrating and shifting, and the sealing from failing, ensuring the overall filtration performance of the equipment is stable.

[0027] To address the problems of cumbersome filter installation and removal, lack of a quick-unlocking linkage mechanism in traditional air purifiers, time-consuming and laborious filter replacement, maintenance, and cleaning, and poor operational convenience, this device is equipped with a linkage-type quick-unlocking mechanism. An unlocking block 1103 is vertically slidably mounted inside the locking slot 1102. A second spring 1105 is fixedly mounted on the inner wall of the bottom side of the locking slot 1102. The upper end of the second spring 1105 is fixedly connected to the unlocking block 1103, supporting the unlocking block 1103 and limiting its contact with the locking block 1101 under normal conditions. A horizontal unlocking groove 1200 is opened on the side of the purification filter body 300. A third spring 1201 is fixedly mounted on the inner wall of the unlocking groove 1201. An unlocking lever 1202 is fixedly mounted on the outer end of the third spring 1201. A retaining groove 1203 is opened on the side of the unlocking block 1103, precisely matching the unlocking lever 1202. When replacing the filter element, manually slide the unlocking block 1103 downwards to compress the second spring 1105 and move it down. At the same time, squeeze the unlocking lever 1202 to compress the third spring 1201 and retract it. When the unlocking block 1103 moves down to the position groove 1203 and aligns with the unlocking lever 1202, the third spring 1201 elastically resets and pushes the unlocking lever 1202 into the position groove 1203, thus completing the fixing of the unlocking block 1103 and releasing the limiting restraint of the locking plug 1101. The failed filter element can then be quickly removed, greatly simplifying the disassembly and assembly steps and improving maintenance efficiency.

[0028] To address the problem of traditional filters lacking a proper orientation identification structure, leading to easy reverse installation during manual assembly and resulting in disordered airflow, seal failure, and a significant decrease in purification performance, this device features a dedicated filter mis-installation prevention structure. A locking slot 1102 is specifically positioned on the air inlet side of the purification filter body 300, forming a unique alignment installation structure. During installation, the alignment of the locking structure allows for quick identification of the filter's orientation, structurally preventing reverse installation and ensuring filter installation accuracy and duct sealing. Simultaneously, a removable clip cover 500 is snapped onto the outside of the air purifier body 100, providing all-around protection for the inner pre-filter 400 and the purification filter body 300, preventing dust accumulation during idle periods and damage from external impacts, thus extending the filter's lifespan.

[0029] To address the shortcomings of traditional filter monitoring devices, such as lack of IoT transmission capabilities, inability to store and analyze data in the cloud, lack of remote early warning, and cumbersome device configuration, this device features a dual-mode IoT communication transmission mechanism. The device incorporates a built-in Wi-Fi and Bluetooth dual-mode communication module, employing the lightweight MQTT IoT-specific communication protocol and JSON data format encoding, offering advantages such as low power consumption, high stability, and low latency. The Wi-Fi module supports the IEEE 802.11b / g / n 2.4GHz band and serves as the primary communication channel, connecting to a home router to access a cloud server for real-time data uploads, cloud command issuance, and early warning message pushes. The Bluetooth 4.2 module serves as a backup channel for near-field pairing with mobile phones, rapid device network configuration, firmware upgrades, and offline data synchronization. The device incorporates a 30-second high-frequency heartbeat mechanism, periodically uploading online status and real-time sensor data to the cloud. It proactively triggers event pushes when data anomalies occur, ensuring the device is online and controllable 24 / 7.

[0030] To address the issues of poor power supply compatibility, high power consumption, and the need for dedicated power supplies in traditional smart monitoring devices, this device features a universal low-power power supply mechanism. It uses a universal USB Type-C interface for power supply, compatible with various power sources such as 5V / 1A power adapters, portable power banks, and the USB output ports of air purifiers, eliminating the need for dedicated power supply equipment and making it suitable for a wide range of scenarios. The device's overall average operating power consumption is only 1.5W, with a normal operating current of approximately 300mA and a peak Wi-Fi communication current of 500mA. A standard 10000mAh power bank can support continuous operation for 30 hours. This low-power design effectively reduces energy consumption, improving battery life and ease of use.

[0031] To address the shortcomings of traditional filter lifespan assessment methods that rely solely on a single, fixed algorithm, failing to consider environmental factors, user habits, and regional air quality differences, resulting in poor versatility, insufficient accuracy, and the inability to continuously optimize and iterate, this device incorporates a cloud-based AI multi-source fusion lifespan prediction and machine learning optimization mechanism. The core of this device employs a multi-factor weighted fusion algorithm to calculate the remaining filter lifespan. The core calculation formula is R=R0-Σ(α·ΔV+β·ΔC+γ·Δt), integrating three core dimensions: wind speed attenuation, filtration efficiency attenuation, and cumulative runtime. The default weighting coefficients are α=0.35, β=0.40, and γ=0.25. Filtration efficiency serves as the primary criterion, wind speed clogging as a secondary criterion, and runtime as a fallback correction factor, balancing professionalism and accuracy. Meanwhile, the cloud platform is equipped with a machine learning microservice architecture, which can achieve iterative optimization of algorithms through massive user data: personalized weighting based on local air quality and usage habits; localized lifespan benchmarks based on group data of the same model and region; and continuous correction of algorithm parameters based on user filter replacement feedback data, solving the pain point of poor adaptability of fixed algorithms and achieving personalized and accurate filter lifespan prediction. The cloud platform is equipped with five functional modules: data storage, filter database, user push, data reports, and operation and maintenance monitoring, realizing long-term data storage, intelligent matching of filter models, hierarchical early warning push, usage report generation, and remote equipment operation and maintenance. The filter lifespan prediction algorithm is described in detail as follows: it uses a multi-factor weighted fusion algorithm to predict filter lifespan, and integrates data from three dimensions to achieve accurate assessment: the algorithm mathematical model, the remaining lifespan percentage is calculated by the following formula: R=R0-Σ(α·ΔV+β·ΔC+γ·Δt), where each parameter is defined as follows: R0: initial lifespan (100%), which starts counting after the user enters the new filter installation date in the App. Initially, both wind speed attenuation and filtration efficiency attenuation are zero, and the cumulative operating time is zero. ΔV (wind speed attenuation): Calculated by comparing the current outlet wind speed with the reference wind speed (the initial wind speed measured when the new filter is installed). ΔV = (V0 - V_current) / V0 × 100%, where V0 is the initial reference wind speed and V_current is the current measured wind speed (the value after temperature and humidity compensation calibration). The faster the wind speed attenuation, the more severe the physical blockage of the filter. ΔC (filtration efficiency attenuation): Calculated by comparing the current outlet particulate matter concentration with the reference concentration (the initial outlet particulate matter concentration measured when the new filter is installed). ΔC = (C_current - C0) / C0 × 100%, where C0 is the initial reference particulate matter concentration (usually close to 0 or a very low value), and C_current is the current measured particulate matter concentration. A decrease in filtration efficiency means that the filter element's adsorption capacity is weakened, and the concentration of particulate matter in the exhaust air increases. It should be noted that when the C0 value is extremely low (close to the sensor's detection limit), the calculation of ΔC may be greatly affected by noise.To address this, the algorithm incorporates a minimum effective value threshold: when C0 < 5 μg / m³, absolute value judgment is used; if C_current ≥ 15 μg / m³, the filtration efficiency is considered significantly reduced, with ΔC calculated at 50%. Δt (cumulative running time): the actual running time of the air purifier accumulated in hours. The device determines whether the purifier is running based on the continuous wind conditions detected by the wind speed sensor. When a wind speed ≥ 0.3 m / s is detected, it is considered to be in operation, and the time is accumulated. α, β, and γ (weighting coefficients): weighting coefficients determined through fitting of a large amount of experimental data, with default values ​​of 0.35, 0.40, and 0.25, respectively. The sum of the three weighting coefficients is 1, reflecting the different degrees of influence of the three dimensions on the filter life. Filtration efficiency decay (β=0.40) is given the highest weight because filtration efficiency is directly related to the purification effect and is the most critical indicator for judging whether the filter has failed. Wind speed decay (α=0.35) is the second highest, reflecting the impact of physical blockage on the purifier's operation. Cumulative running time (γ=0.25) is the basic reference item with the lowest weight, mainly playing a corrective and backup role.

[0032] To address the lack of guidance in traditional filter maintenance, which leaves users unsure of how to assess filter status, select compatible filters, or properly replace them, this device features a one-stop closed-loop service system via a mobile app. The device comes with a native app for both iOS and Android platforms, supporting quick QR code binding, SmartConfig intelligent network configuration, and multi-device group management. The homepage visually displays the remaining lifespan and wear trend curves of the filters. Leveraging a massive cloud-based filter database, the device automatically matches compatible filters to the purifier model, providing price comparisons, purchase links, and parameter references. Customized text, image, and short video replacement tutorials are offered for different models, covering the entire standardized operation process from power outage, disassembly, and reset. The app also supports customizable warning thresholds, multi-channel message push notifications, replacement record generation, device sharing within the family, and online customer service diagnostics. This provides users with a complete closed-loop service from status monitoring, warning reminders, filter selection, replacement guidance, and data review, significantly reducing the knowledge threshold and operational difficulty of filter maintenance.

[0033] To address the issues of traditional filter cartridge warning systems lacking tiered procedures and standardized reset calibration mechanisms after replacement, which can lead to confusing warnings, inaccurate new filter cartridge monitoring data, and invalid identification due to erroneous resets, this device employs a four-level tiered warning system and a standardized reset calibration mechanism. The device uses a four-level closed-loop warning process based on the remaining lifespan of the filter cartridge: First warning period (20%–10%): a solid yellow light, low-frequency reminders via the app, and filter cartridge purchase recommendations; Second alarm period (10%–5%): a solid red light, daily strong reminders via the app, and daily buzzer warnings; Third emergency period (<5%): a high-frequency, rapidly flashing red light, high-frequency, multi-channel emergency replacement notifications via the app, and encrypted buzzer sounds; Fourth redundancy failure period (0% or abnormal data): a rapidly flashing red light, an overload risk warning, and a forced shutdown and replacement reminder. After replacing the filter cartridge, the user can reset it with a single click via the app. The lifespan data is automatically reset in the cloud, and the device continuously collects baseline wind speed and particulate matter concentration data for the new filter cartridge for 30 seconds to complete the new parameter calibration and ensure accurate subsequent monitoring. Meanwhile, the device has an abnormal reset recognition function, which can automatically identify false reset states and avoid monitoring failure caused by misoperation.

[0034] The working principle of this invention is as follows: When assembling and using the equipment, first place the mounting base 600 above the air outlet grille 200 of the air purifier body 100, manually rotate the worm gear 705 in the reverse direction, and drive the bidirectional positive and negative threaded screw 703 to rotate through the worm wheel 704, driving the two sets of transmission L-shaped rods 700 and L-shaped locking rods 701 to open outwards, and pass the hook end of the L-shaped locking rod 701 through the grille hole of the air outlet grille 200. Then rotate the worm gear 705 in the forward direction, so that the two sets of L-shaped locking rods 701 tighten in opposite directions and hook and fix them on the grille, thus completing the stable fitting and assembly of the mounting base 600. The monitoring base 900 is then placed in the limiting groove of the mounting base 600, ensuring that all sensors at the bottom of the positioning base 901 are aligned with the ventilation grille and precisely aligned with the direction of the airflow. The locking screw 803 is manually rotated to push the compression plate 801 to clamp and fix the monitoring base 900 in conjunction with the buffer pad 802. This, combined with the anti-slip soft pad, achieves double limiting and fixing, completing the assembly of the monitoring components. Simultaneously, the device's Type-C power supply wiring and the App's Bluetooth and Wi-Fi network pairing are completed, enabling the device to be powered on and connected to the network. During device operation, the wind speed sensor 903, particulate matter sensor 904, and temperature and humidity sensor 905 collect real-time high-frequency data on the outlet wind speed, particulate matter concentration, and ambient temperature and humidity. This data is then uploaded to the microcontroller 906 for analog-to-digital conversion, temperature and humidity compensation calibration, sliding filtering, and outlier removal preprocessing to obtain accurate and effective data. After the local device completes the initial data analysis, it uploads the data to the cloud server via the IoT dual-mode communication module. The cloud-based AI multi-factor weighted algorithm combines real-time data, device baseline parameters, regional environmental data, and user habits to accurately calculate the remaining lifespan of the filter element. Based on the remaining lifespan range, it triggers corresponding levels of LED light and buzzer sound and light warnings, as well as mobile app push notifications, simultaneously providing users with suitable filter element selection solutions and replacement guidance tutorials. When the device detects that the filter element has reached the replacement threshold, the user sequentially removes the retaining cover 500 on the outside of the air purifier body 100 and the pre-filter 400. By pressing the unlocking lever 1202 and sliding the unlocking block 1103, the locking structure is quickly unlocked, and the expired filter element is removed. When installing a new filter element, the dedicated locking slot 1102 on the air inlet side ensures correct alignment and prevents misalignment. The filter element squeezes the locking insert 1101 to retract and avoid misalignment. After positioning, the first spring 1104 resets to achieve automatic locking and fixation, ensuring that the filter element is installed firmly and sealed tightly. After installation, the user confirms the filter replacement on the App. The device automatically completes the calibration of the new filter's baseline data and resets its lifespan parameters, restoring normal and accurate monitoring. At the same time, the cloud automatically archives the usage log of the old filter and continuously iterates and optimizes the algorithm model. The entire process achieves fully automated operation of intelligent filter monitoring, accurate early warning, convenient replacement, closed-loop management, and continuous optimization, adapting to the long-term intelligent maintenance needs of various household and commercial air purifiers.

[0035] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air purifier filter life warning and replacement auxiliary device based on the Internet of Things, comprising an air purifier body (100), wherein an air outlet grille (200) is provided on the air purifier body (100), a purification filter body (300) is movably installed on the back side of the air purifier body (100), a pre-filter (400) is attached to the back side of the purification filter body (300), and a retainer (500) is snapped onto the air purifier body (100), the retainer (500) being in contact with the pre-filter (400), characterized in that: The air outlet grille (200) is provided with a mounting base (600), the mounting base (600) is provided with a positioning mechanism, the positioning mechanism is provided with a limit mechanism, the limit mechanism is provided with a monitoring mechanism, the monitoring mechanism includes a monitoring seat (900) installed on the mounting base (600), a positioning seat (901) is fixedly installed in the middle position of the monitoring seat (900), a ventilation hole (902) is opened in the middle position of the positioning seat (901), and a wind speed sensor is fixedly installed on the bottom side of the positioning seat (901) directly below the ventilation hole (902). 903), a particulate matter sensor (904) is fixedly installed at one end of the bottom side of the positioning base (901). The particulate matter sensor (904) is on the same side as the wind speed sensor (903). A temperature and humidity sensor (905) is fixedly installed at the other end of the bottom side of the positioning base (901). The temperature and humidity sensor (905) is located on the other side of the wind speed sensor (903). The wind speed sensor (903), particulate matter sensor (904) and temperature and humidity sensor (905) are all compatible with the air purifier body (100). The monitoring base (900) is equipped with an early warning mechanism, which is used to provide intuitive early warnings and reminders to the monitoring unit in different monitoring states; The air purifier body (100) is equipped with a locking mechanism for assisting in the positioning of the purification filter body (300) during installation. The locking mechanism includes a collection slot (1100) on the air purifier body (100), a locking block (1101) slidably installed inside the collection slot (1100), a locking slot (1102) on the purification filter body (300), the locking block (1101) being inserted into the locking slot (1102), an unlocking block (1103) slidably installed on the locking slot (1102), the bottom side of the locking block (1101) contacting the upper side of the unlocking block (1103), and an unlocking mechanism on the purification filter body (300) contacting the unlocking block (1103).

2. The air purifier filter life warning and replacement auxiliary device based on the Internet of Things as described in claim 1, characterized in that: The positioning mechanism includes two transmission L-shaped rods (700) mounted on the mounting base (600). The outer ends of the two transmission L-shaped rods (700) are fixedly mounted with L-shaped locking rods (701), and the hook ends of the two L-shaped locking rods (701) are hooked onto the grille of the air outlet grille (200).

3. The air purifier filter life warning and replacement auxiliary device based on the Internet of Things according to claim 2, characterized in that: The mounting base (600) has two fixed blocks (702) inside, and two bidirectional positive and negative threaded screws (703) are rotatably mounted on the two fixed blocks (702). Two transmission L-shaped rods (700) are respectively screwed to the two ends of the bidirectional positive and negative threaded screws (703).

4. The air purifier filter life warning and replacement auxiliary device based on the Internet of Things according to claim 3, characterized in that: The mounting base (600) has a worm gear (705) rotatably mounted inside, and a worm wheel (704) meshes on the worm gear (705). The worm wheel (704) is fixedly sleeved in the middle position of the bidirectional positive and negative threaded screw (703).

5. The air purifier filter life warning and replacement auxiliary device based on the Internet of Things according to claim 1, characterized in that: The limiting mechanism includes a storage groove (800) on the upper side of the mounting base (600), a pressing plate (801) is slidably installed inside the storage groove (800), a buffer pad (802) is fixedly bonded to one side of the pressing plate (801), a locking screw (803) is threaded onto the mounting base (600), and the inner end of the locking screw (803) is fixedly installed on the other side of the pressing plate (801).

6. The air purifier filter life warning and replacement auxiliary device based on the Internet of Things according to claim 1, characterized in that: The monitoring mechanism also includes a microcontroller (906), which is communicatively connected to a wind speed sensor (903), a particulate matter sensor (904), and a temperature and humidity sensor (905).

7. The air purifier filter life warning and replacement auxiliary device based on the Internet of Things according to claim 6, characterized in that: The warning mechanism includes a multi-color LED indicator (1000) installed on the upper side of the monitoring base (900). The multi-color LED indicator (1000) is equipped with three sets of lights. A buzzer (1001) is fixedly installed on the monitoring base (900). The buzzer (1001) is attached to the multi-color LED indicator (1000). Both the multi-color LED indicator (1000) and the buzzer (1001) are connected to the microcontroller (906) for communication.

8. The air purifier filter life warning and replacement auxiliary device based on the Internet of Things according to claim 1, characterized in that: A first spring (1104) is fixedly installed on the inner wall of the top side of the receiving slot (1100), and the other end of the first spring (1104) is fixedly installed on the upper side of the locking block (1101).

9. The air purifier filter life warning and replacement auxiliary device based on the Internet of Things according to claim 1, characterized in that: A second spring (1105) is fixedly installed on the bottom inner wall of the locking slot (1102), and the upper end of the second spring (1105) is fixedly installed on the bottom side of the unlocking block (1103).

10. The air purifier filter life warning and replacement auxiliary device based on the Internet of Things according to claim 1, characterized in that: The unlocking mechanism includes an unlocking groove (1200) formed on the purification filter body (300). A third spring (1201) is fixedly installed on the inner wall of the unlocking groove (1200). An unlocking lever (1202) is fixedly installed on the other end of the third spring (1201). A retaining groove (1203) is formed on one side of the unlocking lever (1103), and the unlocking lever (1202) is inserted into the inside of the retaining groove (1203).

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