Air purifier and air purification method

Abstract

The present invention relates to an air purifier, belonging to the technical field of air treatment equipment. An air purifier comprises: a shell assembly, wherein the shell assembly is provided with an air inlet; a fan assembly, wherein the fan assembly is arranged on the shell assembly, and wherein the fan assembly is provided with an air passage; a filter, wherein the filter is arranged on the shell assembly, wherein one side of the filter is arranged opposite to the air inlet, and the side of the filter away from the air inlet is arranged opposite to the air inlet end of the air passage; an air outlet grille, wherein the air outlet grille cover is arranged on the shell assembly, wherein the air outlet grille is provided with an air outlet, and wherein the air outlet is connected to the air outlet end of the air passage. After the air enters the air inlet, it passes through the filter to filter out dust and other impurities, then flows through the air passage and is output to the outside from the air outlet, thereby purifying the air. The installation structure of the air purifier is simple, and the installation structure of the fan assembly and the filter in the shell assembly is compact, and the air purification efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment equipment, and in particular to an air purifier and an air purification method. Background Art

[0002] As people's living standards improve, the popularity of air purifiers is increasing. When air purifiers are running for a long time, dust will accumulate on the filter. The existing air purifiers have a complex structure and it is difficult to remove the filter for cleaning. Therefore, there is an urgent need for an air purifier with a simple structure and simple installation process to improve the purification efficiency and facilitate users to remove and clean the filter. Summary of the invention

[0003] Based on this, it is necessary to provide an air purifier and an air purification method to address the problem that the air purifier has a complex structure and the filter is inconvenient to disassemble.

[0004] An air purifier comprises: a shell assembly, the shell assembly is provided with an air inlet; a fan assembly, the fan assembly is arranged on the shell assembly, and the fan assembly is provided with an air passage; a filter, the filter is arranged on the shell assembly, one side of the filter is arranged opposite to the air inlet, and the side of the filter away from the air inlet is arranged opposite to the air inlet end of the air passage; an air outlet grille, the air outlet grille cover is arranged on the shell assembly, the air outlet grille is provided with an air outlet, and the air outlet is connected to the air outlet end of the air passage.

[0005] The first aspect of the present application discloses an air purifier, which is provided with an air inlet on a housing assembly, and a fan assembly and a filter are installed in the housing assembly, so that one side of the filter is arranged opposite to the air inlet, and the other side is arranged opposite to the air inlet end of the fan assembly, and an air outlet grille is covered on the housing assembly, and the air outlet of the air outlet grille is arranged opposite to the air outlet end of the fan assembly, so that the air enters the air inlet and passes through the filter to filter out dust and other impurities, and finally flows through the wind channel and is output to the outside world from the air outlet, thereby achieving the purpose of purifying the air. The air purifier has a simple structure, and the installation structure of the fan assembly and the filter in the housing assembly is compact, which makes the air purification efficiency higher, and at the same time effectively makes the air purifier small in size, avoiding the air purifier from occupying too much space.

[0006] In one embodiment, the shell assembly includes a support body, a front cover and a rear cover, the front cover is detachably connected to the support body, the front cover cooperates with the support body to form a filter accommodating cavity, the filter is located in the filter accommodating cavity, the rear cover is arranged on the support body and is located on a side away from the front cover, and the rear cover is detachably connected to the support body. The front cover and the rear cover are detachably connected to the support body respectively, and the filter is installed in the filter accommodating cavity formed by the front cover and the support body. The filter can be replaced or cleaned by removing the front cover, so as to avoid the difficulty in replacing or cleaning the filter, resulting in the waste of the whole machine resources of the air purifier. The removal of the rear cover can facilitate the subsequent maintenance of other internal components. The structural design of the shell assembly is simple, which simplifies the installation process of the shell assembly.

[0007] In one embodiment, the front cover is provided with the air inlet holes, the number of the air inlet holes is several, and the several air inlet holes are evenly and densely distributed on the front cover. By providing several air inlet holes on the front cover, the air intake efficiency and purification efficiency of the air purifier are higher, and the design of the several air inlet holes evenly and densely distributed on the front cover enables the front cover to protect and isolate the filter.

[0008] In one embodiment, the air outlet grille is arranged on the support body and / or the rear cover, and the support body, the rear cover and the air outlet grille cooperate to form an installation cavity, and the fan assembly is located in the installation cavity. The installation cavity is formed by the support body, the rear cover and the air outlet grille, and the support body, the rear cover and the air outlet grille are detachably connected. The fan assembly is installed in the installation cavity, and the rear cover and the air outlet grille are removed, so that the fan assembly or other internal components can be repaired later.

[0009] In one embodiment, a magnet is further included, and the magnet is arranged on the front cover and opposite to the support body, and the magnet and the support body are magnetically attracted to each other. By installing the magnet on the front cover and using a magnetic metal material for the support body, when the front cover is connected to the support body, the magnet and the support body are magnetically attracted to each other, further strengthening the connection structure between the front cover and the support body, and making it easier to remove the front cover from the support body.

[0010] In one embodiment, the front cover includes a front cover body and a lock buckle, the lock buckle is arranged on the front cover body, the support body is provided with a buckle groove, and also includes an elastic buckle, the elastic buckle is arranged on the support body and located in the buckle groove, and the lock buckle extends into the buckle groove and is adapted to buckle with the elastic buckle. By providing the support body with a buckle groove and providing an elastic buckle at the buckle groove, the lock buckle on the front cover body can extend into the buckle groove and be adapted to buckle with the elastic buckle, so that the connection structure between the front cover and the support body is more stable, and the connection between the front cover and the support body is smooth and simple, and there is no connection mark on the surface. This connection method simplifies the overall installation structure of the air purifier and makes the appearance of the air purifier more simple and beautiful.

[0011] In one embodiment, the front cover further includes a first connection part and a second connection part, the first connection part and the second connection part are respectively arranged on the front cover body, the support body is provided with a first connection groove and a second connection groove, the first connection part and the second connection part are respectively adapted to the first connection groove and the second connection groove. The connection structure between the front cover and the support body is further strengthened by the first connection part and the second connection part being respectively adapted to and plugged into the first connection groove and the second connection groove on the support body. When the front cover needs to be removed from the support body, the front cover is gently buckled down to separate the lock buckle from the elastic buckle, and the first connection part can be completely separated from the first connection groove by tilting the front cover to an appropriate angle. At this time, the front cover is taken out to completely separate the second connection part from the second connection groove, thereby removing the front cover. The connection structure between the front cover and the support body is simple, which ensures a stable connection while making the disassembly method very simple and will not damage the components.

[0012] In one embodiment, the rear cover is provided with a limiting column, and the support body is provided with a limiting portion on a side facing the rear cover, and the limiting column is adapted to be installed with the limiting portion. The limiting column is adapted to be installed with the limiting portion, so that the rear cover and the support body can be stably connected, and at the same time, it is convenient to disassemble and repair and maintain the internal components.

[0013] In one embodiment, the rear cover is provided with a bracket, and at least a portion of the fan assembly extends into the bracket and abuts against the bracket. By abutting a portion of the fan assembly against the bracket on the rear cover, the installation structure of the fan assembly in the housing assembly is more stable, thereby preventing the fan assembly from vibrating too much when it is started, thereby affecting the overall structural stability of the air purifier.

[0014] In one embodiment, a control component is further included, and the control component is arranged on the housing component and / or the air outlet grille, and the fan component is electrically connected to the control component. By installing the control component on the housing component and / or the air outlet grille, and the control component is electrically connected to the fan component, the start and stop of the fan component can be controlled by the control component, thereby controlling the start and stop of the air purifier. The control component can be wirelessly connected to a remote control or a mobile phone app, so that the user can control the start and stop of the air purifier or adjust the purification mode by operating and adjusting the remote control or mobile phone app, which is convenient to use.

[0015] In one embodiment, the control component includes a circuit board component and a control component, wherein the circuit board component is arranged on the housing component and is located inside the housing component, the control component is arranged on the housing component and / or the air outlet grille and is located outside the housing component, and the control component is electrically connected to the circuit board component. By installing the circuit board component inside the housing component, the circuit board component is electrically connected to the internal component, and the control component is installed outside the housing component, and the control component is electrically connected to the circuit board component, the user can adjust the control component so that the control component feeds back the adjustment signal to the circuit board component, thereby realizing control of the internal component.

[0016] In one embodiment, the control assembly includes a control panel and a display panel, the control panel is arranged on the air outlet grille, the display panel is arranged on the control panel and / or the shell assembly, the shell assembly is provided with a receiving groove, the display panel is bent at the connection with the control panel, and the display panel is adapted to the receiving groove; the display panel and the control panel are both electrically connected to the circuit board assembly. By bending the display panel at the connection with the control panel and installing the display panel at the receiving groove on the shell assembly, the display panel is embedded in the surface of the shell assembly, so that the appearance of the air purifier is more regular and beautiful, and the volume of the air purifier is further miniaturized.

[0017] In one embodiment, a pad is further included, and the pad is sandwiched between the housing assembly and the fan assembly. By placing the pad between the housing assembly and the fan assembly, it is possible to prevent the fan assembly from vibrating too much when starting, causing the air purifier to shake as a whole or make noise, affecting the user experience.

[0018] In one embodiment, the air outlet grille is provided with a buckle, the housing assembly is provided with a snap, and the buckle is adapted to buckle with the snap. The buckle is adapted to buckle with the snap, so that the connection structure between the air outlet grille and the housing assembly is more stable, and the air outlet grille and the housing assembly can be detachably connected, which is convenient for subsequent repair and maintenance of the air purifier.

[0019] The second aspect of the present application discloses an air purification method, which comprises the following steps:

[0020] S1. Start the fan assembly to suck air from the air inlet and discharge it from the air outlet after being filtered by the filter;

[0021] S2, monitoring the air flow at the air outlet, comparing the air flow at the air outlet with a first preset value, and adjusting the power of the fan assembly according to the difference between the air flow at the air outlet and the first preset value;

[0022] S3, monitoring the load of the fan assembly, and stopping the operation when the load of the fan assembly is greater than a preset value;

[0023] S4. Obtain air quality data of the air inlet and outlet of the air purifier, obtain the difference between the air quality data at the air inlet and the air outlet, and prompt to replace the filter when the difference between the air quality data is lower than a preset value.

[0024] By starting the fan assembly, ensuring that the air circulates and is effectively filtered through the filter, it helps to quickly clean the indoor air, remove pollutants and particulate matter, and improve air quality. By monitoring the air flow at the outlet in real time and comparing it with the preset value, the power of the fan assembly is dynamically adjusted to ensure stable air flow and optimize purification effect and energy consumption. Monitor the load of the fan assembly to avoid overload operation. When the load exceeds the preset value, it automatically stops working to prevent equipment damage and extend its service life. Obtain the air quality data of the air inlet and outlet, calculate the difference, and prompt to replace the filter when the difference is lower than the preset value to ensure that the filter is always in the best condition, improve purification efficiency, and protect user health. Through intelligent monitoring and timely maintenance, the failure rate and maintenance cost of the equipment are reduced, and the service life of the air purifier is extended. Dynamically adjusting the power of the fan assembly can also achieve efficient energy saving, reduce energy consumption, reduce carbon emissions, and meet environmental protection requirements. Intelligently remind users to replace the filter, so that users can perform maintenance in time, ensure that the air purifier is always effective, and improve user experience.

[0025] In one embodiment, the specific steps of step S2 are as follows:

[0026] S21, real-time monitoring is performed through an air flow meter, and the real-time air flow information is transmitted to a processing unit;

[0027] S22, use a filter to smooth the collected data, reduce the impact of noise, and improve data stability;

[0028] S23, setting a first preset value, where the first preset value is the air flow rate to be achieved;

[0029] S24, calculating the difference between the real-time air flow rate and the first preset value;

[0030] S25. Adjust the power of the fan assembly according to the air flow difference.

[0031] Monitor the air flow in real time through the air flow meter to ensure that the system can respond to changes in air flow in a timely manner and improve air purification efficiency. Use filters to smooth the data, reduce noise interference, and provide more accurate and stable air flow data, which helps to make more reliable control decisions. Set the first preset value as the target air flow to ensure that the system can achieve the ideal purification effect and keep the indoor air quality in the best state. Calculate the difference between the air flow and the first preset value in real time, and dynamically adjust the power of the fan assembly according to the difference, so that the air purifier can adapt to different environmental requirements and provide continuous and efficient purification. Adjust the power of the fan assembly according to actual needs to avoid excessive energy consumption, achieve energy saving and environmental protection, and reduce operating costs.

[0032] In one embodiment, the specific steps of step S25 are as follows:

[0033] S251, using PID controller, adjust the power of the fan assembly according to the air flow difference, the control algorithm of the PID controller is expressed as follows:

[0034]

[0035] Among them, P adj (t) is the power adjustment at the current moment, K p is the proportionality coefficient, K i is the integration coefficient, K d is the differential coefficient, ∆Q(t) is the difference between the current air flow rate and the preset flow rate value, is the differential of the difference, used to eliminate long-term errors, is the differential of the difference, used to predict future trends and suppress rapid changes;

[0036] S252. Adjust the actual power of the fan assembly according to the power adjustment amount output by the PID controller.

[0037] The PID controller is used to accurately adjust the power of the fan assembly according to the air flow difference through three control methods: proportional, integral and differential, to ensure that the air flow is always close to the preset value and maintain the air purification effect. The proportional control in the PID controller can quickly respond to changes in the air flow difference and immediately adjust the power output to ensure that the system returns to a stable state in a short time. The PID controller can balance the rapid response and stability of the system, reduce fluctuations during the adjustment process, extend the service life of the equipment, and reduce the frequency of maintenance. The PID controller can dynamically adjust according to the real-time air flow difference, adapt to the air purification needs under different environmental conditions, and provide consistent high-quality air purification effects.

[0038] In one embodiment, the step S25 further includes the following steps:

[0039] S26, real-time monitoring of air flow meter data and fan component power to ensure the system operates in the best condition;

[0040] S27, analyze historical data and real-time data through machine learning algorithms, and adaptively adjust PID control parameters K p , K i , K d , optimize system response speed and stability.

[0041] By real-time monitoring of the data of the air flow meter and the power of the fan components, the system is ensured to operate in the best state, improving the air purification efficiency and equipment reliability. The machine learning algorithm is used to analyze historical data and real-time data, and the PID control parameters are adjusted adaptively to achieve intelligent regulation of the system, ensuring the best purification effect under different environmental conditions.

[0042] In one embodiment, the specific steps of step S4 are as follows:

[0043] S41, selecting air quality parameters and monitoring air quality changes in real time;

[0044] S42, perform multiple sampling in each sampling period, and take the average value as the air quality value at the current moment;

[0045] S43, smoothing the air quality data to reduce the impact of noise;

[0046] S44, setting a preset threshold value of the air quality difference;

[0047] S45. Generate a prompt when the air quality difference is less than a preset threshold value of the air quality difference.

[0048] By selecting air quality parameters and monitoring air quality changes in real time, the system can continuously obtain accurate air quality information to ensure timely grasp of environmental conditions. Multiple sampling is performed in each sampling cycle, and the average value is taken as the air quality value at the current moment, which can effectively reduce accidental errors and improve the reliability and accuracy of the data. Smoothing the air quality data to reduce the impact of noise makes the monitoring data more stable and true, avoiding misjudgments caused by short-term fluctuations. Setting a preset threshold for the air quality difference enables the system to sensitively identify the performance degradation of the filter and ensure that the air quality continues to remain at a good level. When the air quality difference is less than the preset threshold, a prompt is generated to remind the user to replace the filter in time to prevent the air quality from deteriorating due to filter failure.

[0049] In one embodiment, the step S45 further includes the following steps:

[0050] S46. Analyze the changing trend of air quality difference and identify the performance degradation of the filter;

[0051] S47, using historical data to train a machine learning model, dividing the data set into a training set and a test set, using the training set to train the selected machine learning model, adjusting model parameters to improve prediction accuracy, and predicting the life and replacement timing of the filter;

[0052] S48. Evaluate and optimize the model;

[0053] S49. Provide intelligent replacement suggestions to users based on model prediction results and real-time data.

[0054] By analyzing the changing trend of the air quality difference, the performance degradation of the filter can be accurately identified, and the performance degradation of the component can be predicted in advance, which helps to take timely measures. The machine learning model is trained with historical data, and the data set is divided into a training set and a test set. The prediction accuracy of the model is improved through training, so that the system can accurately predict the life and replacement time of the filter. By training and adjusting the parameters of the selected machine learning model, it is ensured that the model can maintain high-precision prediction in different environments and improve the intelligence level of the overall system. The model is evaluated and optimized to continuously improve the prediction ability and stability of the model, ensure the reliability of the prediction results, and reduce false positives and false negatives. According to the model prediction results and real-time data, intelligent replacement suggestions are provided to users, so that users can replace the filter at the best time and keep the air purifier running efficiently. By accurately predicting the replacement time, the filter can be replaced too early or too late, the service life of the filter can be maximized, and resource waste and cost can be reduced. Intelligent replacement suggestions enable users to easily maintain the air purifier, ensure that the indoor air quality is always in the best condition, and improve user satisfaction and comfort.

[0055] In one embodiment, the specific steps of step S48 are as follows:

[0056] S481. The prediction accuracy of the regression model is evaluated by the mean square error. The evaluation expression of the mean square error is as follows:

[0057]

[0058] in, is the predicted value, is the true value, is the sample size;

[0059] S482. Evaluate the accuracy of the model preset. The expression for evaluating the accuracy of the model preset is as follows:

[0060]

[0061] in, For a real example, is a true negative example, For a false positive example, is a false negative example;

[0062] S483, adjusting the model parameters using a grid search or random search method to find a parameter combination;

[0063] S484. Through feature importance analysis, the features that have a greater impact on the prediction results are screened out to improve the model performance;

[0064] S485. Use ensemble learning methods to improve the predictive ability of the model.

[0065] The prediction accuracy of the regression model is evaluated by the mean square error (MSE), which can quantify the error of the model and ensure the reliability of the prediction results. MSE can intuitively reflect the difference between the predicted value and the true value, making it easier to discover and improve the deficiencies in the model. Evaluate the accuracy of the model preset to ensure that the model can maintain high accuracy under different environments and conditions. Through accuracy evaluation, the practicality and stability of the model can be verified to ensure that reliable prediction results can be provided in practical applications. Use grid search or random search methods to adjust model parameters to find the optimal parameter combination. These search methods can systematically explore the parameter space, avoid missing potential optimal parameter combinations, and improve the performance and prediction ability of the model. Through feature importance analysis, features that have a greater impact on the prediction results can be screened out to improve model performance. Feature importance analysis can help identify and retain key features, reduce redundant information, simplify the model, and improve the generalization ability and stability of the model. Ensemble learning methods are used to improve the prediction ability of the model. Ensemble learning can improve the accuracy and robustness of the model by combining the prediction results of multiple base models, reduce the limitations and instability of a single model, and achieve more stable and reliable prediction results.

[0066] In one embodiment, the specific steps of step S46 are as follows:

[0067] S461. Calculate the moving average of the air quality difference to smooth short-term fluctuations and reveal long-term trends. The expression of the moving average is as follows:

[0068]

[0069] in, For the moment The moving average of For the moment The difference in air quality, is the size of the moving average window;

[0070] S462. Use a linear regression model to fit the changing trend of the air quality difference. The expression of the linear regression model is as follows:

[0071]

[0072] in, and is the regression coefficient, is the error term;

[0073] S463. Use the time series analysis method to model and predict the air quality difference. The expression of the time series analysis method is as follows:

[0074]

[0075] in, and They are and Part of the polynomial, is the lag operator, is the number of differences, is the error term;

[0076] S464. Calculate the rate of change of the air quality difference to identify the situation of rapid change. The expression of the rate of change is as follows:

[0077]

[0078] in, is the rate of change of the air quality difference, and is the difference between the current and previous air quality;

[0079] S465. Based on the analysis results, when filter performance degradation is detected, a prompt signal is generated.

[0080] By calculating the moving average of the air quality difference, short-term fluctuations can be effectively smoothed, the impact of noise in the data can be reduced, and the stability and reliability of the data can be improved. The moving average can reveal the long-term trend of the air quality difference, help analyze the overall direction of air quality changes, and help identify the trend and periodic changes in performance degradation. Fitting the changing trend of the air quality difference using a linear regression model can evaluate the rate and direction of performance degradation and provide detailed information about the life of the filter. Applying time series analysis methods to model and predict air quality differences can capture patterns and periodicity that change over time, and further optimize the timing and strategy of replacing filters. Calculating the rate of change of the air quality difference can identify rapidly changing situations, promptly detect rapid changes in performance degradation, and improve response speed and accuracy. According to the analysis results, a prompt signal is generated when filter performance degradation is detected to remind users to replace or maintain it, ensuring that the air purifier is always in the best operating state.

[0081] In one embodiment, the air quality parameter includes at least one of particulate matter, volatile organic matter and carbon dioxide in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 is a three-dimensional diagram of an air purifier;

[0083] Figure 2 This is an exploded view of an air purifier;

[0084] Figure 3 It is a schematic diagram of the structure of the rear cover and the air outlet grille;

[0085] Figure 4 is a cross-sectional view of an air purifier;

[0086] Figure 5 for Figure 4 A local enlarged view of point A;

[0087] Figure 6 is a three-dimensional diagram of the front cover;

[0088] Figure 7 It is a structural schematic diagram of the fan assembly and the supporting body;

[0089] Figure 8 is a three-dimensional image of the back cover;

[0090] Fig. 9 A flow chart of the steps of the air purification method;

[0091] Fig.10 Flow chart of steps for comparing air quality;

[0092] Fig.11 A flow chart of the steps for adjusting the power of the fan assembly according to the air flow difference;

[0093] Fig.12 Flowchart of next steps for comparing air quality;

[0094] Fig.13 A flow chart of the steps for determining air quality;

[0095] Fig.14 A flowchart of the steps to determine air quality and replace the filter;

[0096] Fig.15 A flowchart of the steps for evaluating and optimizing the model;

[0097] Fig.16 Flow chart of the steps for identifying filter performance degradation.

[0098] The corresponding relationship between the reference numerals and the component names is as follows:

[0099] 1 housing assembly, 11 supporting body, 111 elastic buckle, 112 limiting part, 1111 buckle, 12 front cover, 121 front cover body, 122 lock buckle, 123 first connecting part, 124 second connecting part, 13 rear cover, 131 limiting column, 101 air inlet hole, 102 installation cavity, 103 filter accommodating cavity, 104 buckle groove, 105 first connecting groove, 106 second connecting groove, 107 bracket, 108 accommodating groove;

[0100] 2 fan assembly, 201 air passage;

[0101] 3. Filter;

[0102] 4 air outlet grille, 41 buckle connection portion, 401 air outlet;

[0103] 5 control component, 51 circuit board component, 52 control component, 521 control panel, 522 display panel;

[0104] 6. Magnets;

[0105] 7 pads. DETAILED DESCRIPTION

[0106] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0107] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0108] The air purifier and air purification method according to some embodiments of the present invention are described below with reference to the accompanying drawings.

[0109] Embodiment 1, as Figures 1 to 8 As shown, the present embodiment discloses an air purifier, comprising: a shell assembly 1, the shell assembly 1 is provided with an air inlet hole 101; a fan assembly 2, the fan assembly 2 is arranged on the shell assembly 1, and the fan assembly 2 is provided with an air passage 201; a filter 3, the filter 3 is arranged on the shell assembly 1, one side of the filter 3 is arranged opposite to the air inlet hole 101, and the side of the filter 3 away from the air inlet hole 101 is arranged opposite to the air inlet end of the air passage 201; an air outlet grille 4, the air outlet grille 4 is covered on the shell assembly 1, and the air outlet grille 4 is provided with an air outlet 401, and the air outlet 401 is connected to the air outlet end of the air passage 201.

[0110] The first aspect of the present application discloses an air purifier, which is provided with an air inlet 101 on a housing assembly 1, and a fan assembly 2 and a filter 3 are installed in the housing assembly 1, so that one side of the filter 3 is arranged opposite to the air inlet 101, and the other side is arranged opposite to the air inlet end of the fan assembly 2, and an air outlet grille 4 is covered on the housing assembly 1, and the air outlet 401 of the air outlet grille 4 is arranged opposite to the air outlet end of the fan assembly 2, so that the air enters the air inlet 101 and passes through the filter 3, filters out dust and other impurities, and finally flows through the wind channel 201, and is output to the outside world from the air outlet 401, thereby achieving the purpose of purifying the air. The air purifier has a simple structure, and the installation structure of the fan assembly 2 and the filter 3 in the housing assembly 1 is compact, so that the air purification efficiency is higher, and at the same time, the volume of the air purifier is effectively miniaturized, and the air purifier is prevented from occupying too much space.

[0111] like Figure 2 and Figure 4 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the housing assembly 1 includes a support body 11, a front cover 12 and a rear cover 13, the front cover 12 is detachably connected to the support body 11, the front cover 12 and the support body 11 cooperate to form a filter accommodating chamber 103, the filter 3 is located in the filter accommodating chamber 103, the rear cover 13 is arranged on the support body 11 and is located on a side away from the front cover 12, and the rear cover 13 is detachably connected to the support body 11. The filter 3 is installed in the filter accommodating chamber 103 formed by the front cover 12 and the support body 11 through the front cover 12 and the rear cover 13 are detachably connected to the support body, and the filter 3 is installed in the filter accommodating chamber 103 formed by the front cover 12 and the support body 11. The filter 3 can be replaced or cleaned by removing the front cover 12, so as to avoid the filter 3 being difficult to replace or clean, resulting in the waste of the whole machine resources of the air purifier. The removal of the rear cover 13 can facilitate the subsequent maintenance of other internal components. The structural design of the housing assembly 1 is simple, which simplifies the installation process of the housing assembly 1.

[0112] like Figure 4 and Figure 6 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the front cover 12 is provided with an air inlet hole 101, the number of the air inlet holes 101 is a plurality, and the plurality of air inlet holes 101 are evenly and densely distributed on the front cover 12. By providing a plurality of air inlet holes 101 on the front cover 12, the air intake efficiency and purification efficiency of the air purifier are higher, and the design that the plurality of air inlet holes 101 are evenly and densely distributed on the front cover 12 enables the front cover 12 to protect and isolate the filter 3.

[0113] like Figure 3 and Figure 4As shown, in addition to the features of the above embodiments, this embodiment further defines that: the air outlet grille 4 is arranged on the support body 11 and / or the rear cover 13, and the support body 11, the rear cover 13 and the air outlet grille 4 cooperate to form an installation cavity 102, and the fan assembly 2 is located in the installation cavity 102. The installation cavity 102 is formed by the support body 11, the rear cover 13 and the air outlet grille 4, and the support body 11, the rear cover 13 and the air outlet grille 4 are detachably connected, the fan assembly 2 is installed in the installation cavity 102, and the rear cover 13 and the air outlet grille 4 are disassembled, so that the fan assembly 2 or other internal components can be repaired later.

[0114] like Figure 6 As shown, in addition to the features of the above-mentioned embodiment, this embodiment is further defined as follows: it also includes a magnet 6, which is arranged on the front cover 12 and opposite to the support body 11, and the magnet 6 and the support body 11 are magnetically attracted to each other. By installing the magnet 6 on the front cover 12 and using a magnetic metal material for the support body 11, when the front cover 12 is connected to the support body 11, the magnet 6 and the support body 11 are magnetically attracted to each other, further strengthening the connection structure between the front cover 12 and the support body 11, and making it easier to remove the front cover 12 from the support body 11.

[0115] like Figure 4 and Figure 5 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the front cover 12 includes a front cover body 121 and a lock 122, the lock 122 is arranged on the front cover body 121, the support body 11 is provided with a buckle groove 104, and also includes an elastic buckle 111, the elastic buckle 111 is arranged on the support body 11 and located in the buckle groove 104, and the lock 122 extends into the buckle groove 104 and is adapted to buckle with the elastic buckle 111. By providing the buckle groove 104 in the support body 11 and arranging the elastic buckle 111 at the buckle groove 104, the lock 122 on the front cover body 121 can extend into the buckle groove 104 and be adapted to buckle with the elastic buckle 111, so that the connection structure between the front cover 12 and the support body 11 is more stable, and the connection between the front cover 12 and the support body 11 is smooth and simple, and there is no connection mark on the surface. This connection method simplifies the overall installation structure of the air purifier and makes the appearance of the air purifier more simple and beautiful.

[0116] like Figure 2 and Figure 6As shown, in addition to the features of the above embodiments, this embodiment further defines: the front cover 12 also includes a first connection portion 123 and a second connection portion 124, the first connection portion 123 and the second connection portion 124 are respectively arranged on the front cover body 121, the support body 11 is provided with a first connection groove 105 and a second connection groove 106, the first connection portion 123 and the second connection portion 124 are respectively adapted to the first connection groove 105 and the second connection groove 106. The first connection part 123 and the second connection part 124 are respectively adapted and plugged with the first connection groove 105 and the second connection groove 106 on the support body 11, so that the connection structure between the front cover 12 and the support body 11 is further strengthened. When the front cover 12 needs to be removed from the support body 11, the front cover 12 can be gently buckled down to separate the lock buckle 122 from the elastic buckle 111. The front cover 12 can be tilted to a proper angle to completely separate the first connection part 123 from the first connection groove 105. At this time, the front cover 12 can be taken out to completely separate the second connection part 124 from the second connection groove 106, so that the front cover 12 can be removed. The connection structure between the front cover 12 and the support body 11 is simple, which ensures a stable connection while making the disassembly method very simple and will not damage the components.

[0117] like Figure 7 and Figure 8 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the rear cover 13 is provided with a limiting column 131, and the side of the support body 11 facing the rear cover 13 is provided with a limiting portion 112, and the limiting column 131 is adapted and installed with the limiting portion 112. The limiting column 131 is adapted and installed with the limiting portion 112, so that the rear cover 13 and the support body 11 can be stably connected, and it is convenient to disassemble and repair and maintain the internal components.

[0118] like Figure 7 and Figure 8 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the rear cover 13 is provided with a bracket 107, and at least part of the fan assembly 2 extends into the bracket 107 and abuts against the bracket 107. By abutting part of the fan assembly 2 against the bracket 107 on the rear cover 13, the installation structure of the fan assembly 2 in the housing assembly 1 is more stable, avoiding excessive vibration amplitude when the fan assembly 2 is started, which affects the overall structural stability of the air purifier.

[0119] like Figure 2 and Figure 3As shown, in addition to the features of the above embodiments, this embodiment is further defined as follows: it also includes a control component 5, the control component 5 is arranged on the housing component 1 and / or the air outlet grille 4, and the fan component 2 is electrically connected to the control component 5. By installing the control component 5 on the housing component 1 and / or the air outlet grille 4, and the control component 5 is electrically connected to the fan component 2, the start and stop of the fan component 2 can be controlled by the control component 5, thereby controlling the start and stop of the air purifier. The control component 5 can be wirelessly connected to a remote control or a mobile phone app, so that the user can control the start and stop of the air purifier or adjust the purification mode by manipulating and adjusting the remote control or the mobile phone app, which is convenient to use.

[0120] like Figure 4 and Figure 7 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the control component 5 includes a circuit board component 51 and a control component 52, the circuit board component 51 is arranged on the housing component 1 and is located inside the housing component 1, the control component 52 is arranged on the housing component 1 and / or the air outlet grille 4 and is located outside the housing component 1, and the control component 52 is electrically connected to the circuit board component 51. By installing the circuit board component 51 in the housing component 1, the circuit board component 51 is electrically connected to the internal components, and the control component 52 is installed outside the housing component 1, and the control component 52 is electrically connected to the circuit board component 51, the user can adjust the control component 52 so that the control component 52 feeds back the adjustment signal to the circuit board component 51, thereby realizing the control of the internal components.

[0121] like Figure 3 and Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the control assembly 52 includes a control panel 521 and a display panel 522, the control panel 521 is arranged on the air outlet grille 4, the display panel 522 is arranged on the control panel 521 and / or the housing assembly 1, the housing assembly 1 is provided with a receiving groove 108, the display panel 522 is bent at the connection with the control panel 521, and the display panel 522 is adapted to the receiving groove 108; the display panel 522 and the control panel 521 are both electrically connected to the circuit board assembly 51. By bending the display panel 522 at the connection with the control panel 521, and installing the display panel 522 at the receiving groove 108 on the housing assembly 1, the display panel 522 is embedded in the surface of the housing assembly 1, so that the appearance of the air purifier is more regular and beautiful, and the volume of the air purifier is further miniaturized.

[0122] like Figure 3 and Figure 7As shown, in addition to the features of the above embodiment, this embodiment is further defined as follows: it also includes a pad 7, and the pad 7 is sandwiched between the housing assembly 1 and the fan assembly 2. By arranging the pad 7 between the housing assembly 1 and the fan assembly 2, it is possible to prevent the fan assembly 2 from vibrating too much when starting, causing the air purifier to shake as a whole or make noise, affecting the user experience.

[0123] like Figure 3 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the air outlet grille 4 is provided with a buckle 41, the housing assembly 1 is provided with a buckle 1111, and the buckle 41 is adapted to buckle with the buckle 1111. The buckle 41 is adapted to buckle with the buckle 1111, so that the connection structure between the air outlet grille 4 and the housing assembly 1 is more stable, and the air outlet grille 4 and the housing assembly 1 can be detachably connected, which is convenient for subsequent repair and maintenance of the air purifier.

[0124] Embodiment 2, as Fig. 9 As shown, this embodiment discloses an air purification method, which includes the following steps:

[0125] S1. Start the fan assembly to suck air from the air inlet and discharge it from the air outlet after being filtered by the filter;

[0126] S2, monitoring the air flow at the air outlet, comparing the air flow at the air outlet with a first preset value, and adjusting the power of the fan assembly according to the difference between the air flow at the air outlet and the first preset value;

[0127] S3, monitoring the load of the fan assembly, and stopping the operation when the load of the fan assembly is greater than a preset value;

[0128] S4. Obtain air quality data of the air inlet and outlet of the air purifier, obtain the difference between the air quality data at the air inlet and the air outlet, and prompt to replace the filter when the difference between the air quality data is lower than a preset value.

[0129] By starting the fan assembly, ensuring that the air circulates and is effectively filtered through the filter, it helps to quickly clean the indoor air, remove pollutants and particulate matter, and improve air quality. By monitoring the air flow at the outlet in real time and comparing it with the preset value, the power of the fan assembly is dynamically adjusted to ensure stable air flow and optimize purification effect and energy consumption. Monitor the load of the fan assembly to avoid overload operation. When the load exceeds the preset value, it automatically stops working to prevent equipment damage and extend its service life. Obtain the air quality data of the air inlet and outlet, calculate the difference, and prompt to replace the filter when the difference is lower than the preset value to ensure that the filter is always in the best condition, improve purification efficiency, and protect user health. Through intelligent monitoring and timely maintenance, the failure rate and maintenance cost of the equipment are reduced, and the service life of the air purifier is extended. Dynamically adjusting the power of the fan assembly can also achieve efficient energy saving, reduce energy consumption, reduce carbon emissions, and meet environmental protection requirements. Intelligently remind users to replace the filter, so that users can perform maintenance in time, ensure that the air purifier is always effective, and improve user experience.

[0130] like Fig.10 As shown, in addition to the features of the above embodiment, this embodiment further defines: the specific steps of step S2 are as follows:

[0131] S21, real-time monitoring is performed through an air flow meter, and the real-time air flow information is transmitted to a processing unit;

[0132] S22, use a filter to smooth the collected data, reduce the impact of noise, and improve data stability;

[0133] S23, setting a first preset value, where the first preset value is the air flow rate to be achieved;

[0134] S24, calculating the difference between the real-time air flow rate and the first preset value;

[0135] S25. Adjust the power of the fan assembly according to the air flow difference.

[0136] Monitor the air flow in real time through the air flow meter to ensure that the system can respond to changes in air flow in a timely manner and improve air purification efficiency. Use filters to smooth the data, reduce noise interference, and provide more accurate and stable air flow data, which helps to make more reliable control decisions. Set the first preset value as the target air flow to ensure that the system can achieve the ideal purification effect and keep the indoor air quality in the best state. Calculate the difference between the air flow and the first preset value in real time, and dynamically adjust the power of the fan assembly according to the difference, so that the air purifier can adapt to different environmental requirements and provide continuous and efficient purification. Adjust the power of the fan assembly according to actual needs to avoid excessive energy consumption, achieve energy saving and environmental protection, and reduce operating costs.

[0137] like Fig.11 As shown, in addition to the features of the above embodiment, this embodiment further defines: the specific steps of step S25 are as follows:

[0138] S251, using PID controller, adjust the power of the fan assembly according to the air flow difference, the control algorithm of the PID controller is expressed as follows:

[0139]

[0140] Among them, P adj (t) is the power adjustment at the current moment, K p is the proportionality coefficient, K i is the integration coefficient, K d is the differential coefficient, ∆Q(t) is the difference between the current air flow rate and the preset flow rate value, is the differential of the difference, used to eliminate long-term errors, is the differential of the difference, used to predict future trends and suppress rapid changes;

[0141] S252. Adjust the actual power of the fan assembly according to the power adjustment amount output by the PID controller.

[0142] The PID controller is used to accurately adjust the power of the fan assembly according to the air flow difference through three control methods: proportional, integral and differential, to ensure that the air flow is always close to the preset value and maintain the air purification effect. The proportional control in the PID controller can quickly respond to changes in the air flow difference and immediately adjust the power output to ensure that the system returns to a stable state in a short time. The PID controller can balance the rapid response and stability of the system, reduce fluctuations during the adjustment process, extend the service life of the equipment, and reduce the frequency of maintenance. The PID controller can dynamically adjust according to the real-time air flow difference, adapt to the air purification needs under different environmental conditions, and provide consistent high-quality air purification effects.

[0143] like Fig.12 As shown, in addition to the features of the above embodiment, this embodiment further defines: step S25 and the following steps are included:

[0144] S26, real-time monitoring of air flow meter data and fan component power to ensure the system operates in the best condition;

[0145] S27, analyze historical data and real-time data through machine learning algorithms, and adaptively adjust PID control parameters K p , K i , K d , optimize system response speed and stability.

[0146] By real-time monitoring of the data of the air flow meter and the power of the fan components, the system is ensured to operate in the best state, improving the air purification efficiency and equipment reliability. The machine learning algorithm is used to analyze historical data and real-time data, and the PID control parameters are adjusted adaptively to achieve intelligent regulation of the system, ensuring the best purification effect under different environmental conditions.

[0147] like Fig.13 As shown, in addition to the features of the above embodiment, this embodiment further defines: the specific steps of step S4 are as follows:

[0148] S41, selecting air quality parameters and monitoring air quality changes in real time;

[0149] S42, perform multiple sampling in each sampling period, and take the average value as the air quality value at the current moment;

[0150] S43, smoothing the air quality data to reduce the impact of noise;

[0151] S44, setting a preset threshold value of the air quality difference;

[0152] S45. Generate a prompt when the air quality difference is less than a preset threshold value of the air quality difference.

[0153] By selecting air quality parameters and monitoring air quality changes in real time, the system can continuously obtain accurate air quality information to ensure timely grasp of environmental conditions. Multiple sampling is performed in each sampling cycle, and the average value is taken as the air quality value at the current moment, which can effectively reduce accidental errors and improve the reliability and accuracy of the data. Smoothing the air quality data to reduce the impact of noise makes the monitoring data more stable and true, avoiding misjudgments caused by short-term fluctuations. Setting a preset threshold for the air quality difference enables the system to sensitively identify the performance degradation of the filter and ensure that the air quality continues to remain at a good level. When the air quality difference is less than the preset threshold, a prompt is generated to remind the user to replace the filter in time to prevent the air quality from deteriorating due to filter failure.

[0154] like Fig.14 As shown, in addition to the features of the above embodiment, this embodiment further defines: step S45 and the following steps are included:

[0155] S46. Analyze the changing trend of air quality difference and identify the performance degradation of the filter;

[0156] S47, using historical data to train a machine learning model, dividing the data set into a training set and a test set, using the training set to train the selected machine learning model, adjusting model parameters to improve prediction accuracy, and predicting the life and replacement timing of the filter;

[0157] S48. Evaluate and optimize the model;

[0158] S49. Provide intelligent replacement suggestions to users based on model prediction results and real-time data.

[0159] By analyzing the changing trend of the air quality difference, the performance degradation of the filter can be accurately identified, and the performance degradation of the component can be predicted in advance, which helps to take timely measures. The machine learning model is trained with historical data, and the data set is divided into a training set and a test set. The prediction accuracy of the model is improved through training, so that the system can accurately predict the life and replacement time of the filter. By training and adjusting the parameters of the selected machine learning model, it is ensured that the model can maintain high-precision prediction in different environments and improve the intelligence level of the overall system. The model is evaluated and optimized to continuously improve the prediction ability and stability of the model, ensure the reliability of the prediction results, and reduce false positives and false negatives. According to the model prediction results and real-time data, intelligent replacement suggestions are provided to users, so that users can replace the filter at the best time and keep the air purifier running efficiently. By accurately predicting the replacement time, the filter can be replaced too early or too late, the service life of the filter can be maximized, and resource waste and cost can be reduced. Intelligent replacement suggestions enable users to easily maintain the air purifier, ensure that the indoor air quality is always in the best condition, and improve user satisfaction and comfort.

[0160] like Fig.15 As shown, in addition to the features of the above embodiment, this embodiment further defines: the specific steps of step S48 are as follows:

[0161] S481. The prediction accuracy of the regression model is evaluated by the mean square error. The evaluation expression of the mean square error is as follows:

[0162]

[0163] in, is the predicted value, is the true value, is the sample size;

[0164] S482. Evaluate the accuracy of the model preset. The expression for evaluating the accuracy of the model preset is as follows:

[0165]

[0166] in, For a real example, is a true negative example, For a false positive example, is a false negative example;

[0167] S483, adjusting the model parameters using a grid search or random search method to find a parameter combination;

[0168] S484. Through feature importance analysis, the features that have a greater impact on the prediction results are screened out to improve the model performance;

[0169] S485. Use ensemble learning methods to improve the predictive ability of the model.

[0170] The prediction accuracy of the regression model is evaluated by the mean square error (MSE), which can quantify the error of the model and ensure the reliability of the prediction results. MSE can intuitively reflect the difference between the predicted value and the true value, making it easier to discover and improve the deficiencies in the model. Evaluate the accuracy of the model preset to ensure that the model can maintain high accuracy under different environments and conditions. Through accuracy evaluation, the practicality and stability of the model can be verified to ensure that reliable prediction results can be provided in practical applications. Use grid search or random search methods to adjust model parameters to find the optimal parameter combination. These search methods can systematically explore the parameter space, avoid missing potential optimal parameter combinations, and improve the performance and prediction ability of the model. Through feature importance analysis, features that have a greater impact on the prediction results can be screened out to improve model performance. Feature importance analysis can help identify and retain key features, reduce redundant information, simplify the model, and improve the generalization ability and stability of the model. Ensemble learning methods are used to improve the prediction ability of the model. Ensemble learning can improve the accuracy and robustness of the model by combining the prediction results of multiple base models, reduce the limitations and instability of a single model, and achieve more stable and reliable prediction results.

[0171] like Fig.16 As shown, in addition to the features of the above embodiment, this embodiment further defines: the specific steps of step S46 are as follows:

[0172] S461. Calculate the moving average of the air quality difference to smooth short-term fluctuations and reveal long-term trends. The expression of the moving average is as follows:

[0173]

[0174] in, For the moment The moving average of For the moment The difference in air quality, is the size of the moving average window;

[0175] S462. Use a linear regression model to fit the changing trend of the air quality difference. The expression of the linear regression model is as follows:

[0176]

[0177] in, and is the regression coefficient, is the error term;

[0178] S463. Use the time series analysis method to model and predict the air quality difference. The expression of the time series analysis method is as follows:

[0179]

[0180] in, and They are and Part of the polynomial, is the lag operator, is the number of differences, is the error term;

[0181] S464. Calculate the rate of change of the air quality difference to identify the situation of rapid change. The expression of the rate of change is as follows:

[0182]

[0183] in, is the rate of change of the air quality difference, and is the difference between the current and previous air quality;

[0184] S465. Based on the analysis results, when filter performance degradation is detected, a prompt signal is generated.

[0185] By calculating the moving average of the air quality difference, short-term fluctuations can be effectively smoothed, the impact of noise in the data can be reduced, and the stability and reliability of the data can be improved. The moving average can reveal the long-term trend of the air quality difference, help analyze the overall direction of air quality changes, and help identify the trend and periodic changes in performance degradation. Fitting the changing trend of the air quality difference using a linear regression model can evaluate the rate and direction of performance degradation and provide detailed information about the life of the filter. Applying time series analysis methods to model and predict air quality differences can capture patterns and periodicity that change over time, and further optimize the timing and strategy of replacing filters. Calculating the rate of change of the air quality difference can identify rapidly changing situations, promptly detect rapid changes in performance degradation, and improve response speed and accuracy. According to the analysis results, a prompt signal is generated when filter performance degradation is detected to remind users to replace or maintain it, ensuring that the air purifier is always in the best operating state.

[0186] In addition to the features of the above embodiments, this embodiment further defines that: the air quality parameter includes at least one of particulate matter, volatile organic matter and carbon dioxide in the air.

[0187] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0188] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An air purifier, It is characterized in that include: A shell assembly (1), wherein the shell assembly (1) is provided with an air inlet hole (101); A fan assembly (2), the fan assembly (2) being arranged on the housing assembly (1), the fan assembly (2) being provided with an air passage (201); A filter screen (3), the filter screen (3) being arranged on the housing assembly (1), one side of the filter screen (3) being arranged opposite to the air inlet hole (101), and the side of the filter screen (3) away from the air inlet hole (101) being arranged opposite to the air inlet end of the air passage (201); An air outlet grille (4), the air outlet grille (4) being covered on the housing assembly (1), the air outlet grille (4) being provided with an air outlet (401), the air outlet (401) being in communication with an air outlet end of the air passage (201); The housing assembly (1) comprises a supporting body (11), a front cover (12) and a rear cover (13); the front cover (12) is detachably connected to the supporting body (11); the front cover (12) cooperates with the supporting body (11) to form a filter accommodating cavity (103); the filter (3) is located in the filter accommodating cavity (103); the rear cover (13) is arranged on the supporting body (11) and is located on a side away from the front cover (12); and the rear cover (13) is detachably connected to the supporting body (11); The front cover (12) comprises a front cover body (121) and a lock buckle (122), wherein the lock buckle (122) is arranged on the front cover body (121), the support body (11) is provided with a buckle connection groove (104), and further comprises an elastic buckle (111), wherein the elastic buckle (111) is arranged on the support body (11) and is located in the buckle connection groove (104), and the lock buckle (122) extends into the buckle connection groove (104) and is adapted to buckle with the elastic buckle (111); The front cover (12) further comprises a first connecting portion (123) and a second connecting portion (124), wherein the first connecting portion (123) and the second connecting portion (124) are respectively arranged on the front cover body (121), and the support body (11) is provided with a first connecting groove (105) and a second connecting groove (106), and the first connecting portion (123) and the second connecting portion (124) are respectively adapted to the first connecting groove (105) and the second connecting groove (106); The rear cover (13) is provided with a limiting column (131), and a limiting portion (112) is provided on a side of the support body (11) facing the rear cover (13), and the limiting column (131) is adapted to be installed with the limiting portion (112); The rear cover (13) is provided with a bracket (107), and at least a portion of the fan assembly (2) extends into the bracket (107) and abuts against the bracket (107).

2. The air purifier according to claim 1, It is characterized in that The front cover (12) is provided with the air inlet holes (101), and the number of the air inlet holes (101) is a plurality, and the plurality of air inlet holes (101) are evenly and densely distributed on the front cover (12).

3. The air purifier according to claim 1, It is characterized in that The air outlet grille (4) is arranged on the supporting body (11) and / or the rear cover (13); the supporting body (11), the rear cover (13) and the air outlet grille (4) cooperate to form an installation cavity (102); the fan assembly (2) is located in the installation cavity (102).

4. The air purifier according to claim 1, It is characterized in that It also comprises a magnet (6), wherein the magnet (6) is arranged on the front cover (12) and is arranged opposite to the supporting body (11), and the magnet (6) and the supporting body (11) are magnetically attracted to each other.

5. The air purifier according to claim 1, It is characterized in that The invention also comprises a control component (5), the control component (5) comprising a circuit board component (51) and a control component (52), the circuit board component (51) being arranged on the housing component (1) and located inside the housing component (1), the control component (52) being arranged on the housing component (1) and / or the air outlet grille (4) and located outside the housing component (1), and the control component (52) being electrically connected to the circuit board component (51); and / or further comprising an air flow meter, the air flow meter being arranged on the air outlet grille (4) and located at the air outlet (401); and / or further comprising a first air quality sensor, the first air quality sensor being arranged on the housing assembly (1) and located at the air inlet hole (101); And / or further comprises a second air quality sensor, wherein the second air quality sensor is arranged on the air outlet grille (4) and located at the air outlet (401).

6. An air purification method, used in the air purifier according to any one of claims 1 to 5, the air purification method comprising the following steps: S1. Start the fan assembly to suck air from the air inlet and discharge it from the air outlet after being filtered by the filter; S2, monitoring the air flow at the air outlet, comparing the air flow at the air outlet with a first preset value, and adjusting the power of the fan assembly according to the difference between the air flow at the air outlet and the first preset value; S3, monitoring the load of the fan assembly, and stopping the operation when the load of the fan assembly is greater than a preset value; S4. Obtain air quality data of the air inlet and outlet of the air purifier, obtain the difference between the air quality data at the air inlet and the air outlet, and prompt to replace the filter when the difference between the air quality data is lower than a preset value.

7. The air purification method according to claim 6, It is characterized in that The specific steps of step S2 are as follows: S21, real-time monitoring is performed through an air flow meter, and the real-time air flow information is transmitted to a processing unit; S22, use a filter to smooth the collected data, reduce the impact of noise, and improve data stability; S23, setting a first preset value, where the first preset value is the air flow rate to be achieved; S24, calculating the difference between the real-time air flow rate and the first preset value; S25. Adjust the power of the fan assembly according to the air flow difference.

8. The air purification method according to claim 7, It is characterized in that The specific steps of step S25 are as follows: S251, using PID controller, adjust the power of the fan assembly according to the air flow difference, the control algorithm of the PID controller is expressed as follows: Among them, P adj (t) is the power adjustment at the current moment, K p is the proportionality coefficient, K i is the integration coefficient, K d is the differential coefficient, ΔQ(t) is the difference between the current air flow rate and the preset flow rate value, is the differential of the difference, used to eliminate long-term errors, is the differential of the difference, used to predict future trends and suppress rapid changes; S252. Adjust the actual power of the fan assembly according to the power adjustment amount output by the PID controller.

9. The air purification method according to claim 8, It is characterized in that The step S25 further includes the following steps: S26, real-time monitoring of air flow meter data and fan component power to ensure the system operates in the best condition; S27, analyze historical data and real-time data through machine learning algorithms, and adaptively adjust PID control parameters K p , K i , K d , optimize system response speed and stability.

10. The air purification method according to claim 7, It is characterized in that The specific steps of step S4 are as follows: S41, selecting air quality parameters and monitoring air quality changes in real time; S42, perform multiple sampling in each sampling period, and take the average value as the air quality value at the current moment; S43, smoothing the air quality data to reduce the impact of noise; S44, setting a preset threshold value of the air quality difference; S45. Generate a prompt when the air quality difference is less than a preset threshold value of the air quality difference.

Images