3125 results about "Air purifiers" patented technology

The present invention provides an air purifier including an outer case having a filtering cavity and a driving cavity spaced apart from each other, a filter received in the filtering cavity, a driving fan received in the driving cavity. The outer case has at least one air inlet and an air output. An air hub extends into the driving cavity. The air hub includes a first air drawing frame and a second air drawing frame coaxially formed with respect to the filter. An axial direction of the first air drawing frame is aligned with a longitudinal axis of the driving fan. The second air drawing frame extends peripherally, upwardly and radially from the first air drawing frame into the driving cavity.

The invention discloses an injection molding process for a plastic part of an air purifier, and relates to the technical field of injection molding processes. Multi-area dynamic mold temperature adjustment is performed, a plurality of temperature control areas are divided according to the thin wall and curved surface structure characteristics of the plastic part, the temperature is adjusted in real time, stress concentration and deformation are remarkably reduced, and the service life of the plastic part is prolonged. The problem of shrinkage stress of a thin-wall area is solved in a targeted mode, cooling of a thick area is accelerated, meanwhile, real-time temperature control and deformation compensation are controlled in a linkage mode, the temperature and the cooling rate are dynamically adjusted according to deformation data monitored in real time, and the deformation trend is predicted, so that pre-deformation compensation is provided, warping of the thin-wall area and the curved surface area is controlled, and deformation of the thin-wall area and the curved surface area is controlled. The stability of the plastic part in the forming process is kept, and the product precision is improved; in addition, simulation prediction and mold parameter adjustment are carried out, cooling requirements of different areas are adjusted, the temperature difference between the thin wall and the curved surface area is reduced, and the whole cooling process is more efficient.

The invention discloses a plasma air purifier control method and system based on artificial intelligence, and the method comprises the steps: collecting the internal and surrounding environment data of a plasma air purifier in real time, extracting pollution space distribution characteristics through combining with an improved Point Net + + network, and constructing a knowledge graph containing the pollution concentration, equipment parameters and other multi-dimensional information. A graph neural network (GCN) is innovatively adopted to establish a nonlinear mapping model of working parameters and filtering efficiency, key parameter combinations such as voltage and wind speed are dynamically optimized through a strategy gradient reinforcement learning algorithm, and a strategy library with the maximum filtering efficiency is formed. And a multi-physics field coupling simulation technology is introduced to verify the reliability of the strategy, a heterogeneous knowledge graph is constructed, and rapid generation and accurate execution of a control instruction are realized. The difference between real data and twin data is compared in real time through a digital twin technology, a reinforcement learning strategy is dynamically adjusted, and a closed-loop optimization system is formed. The purification efficiency and the energy efficiency ratio of the plasma air purifier are remarkably improved.

The invention relates to the field of household appliances, and discloses an air purifier efficient filter screen replacement prompting method and system.The method comprises the steps that firstly, air adsorption data are obtained, and the concentration of pollution particles is recognized to determine a filter screen load mode; analyzing the use state of the filter screen, and performing attenuation detection in combination with historical replacement records to obtain attenuation data; calculating the service residual life according to the attenuation data, evaluating a purification index, generating a filter screen efficiency index in combination with the environment air quality, and dividing replacement levels; then configuring multi-order prompt information according to levels, determining a filter screen edge area, calculating a penetration rate and positioning a weak part; and finally, generating a local failure graph, extracting failure interference factors, constructing adaptive replacement logic and formulating a replacement prompt scheme. The filter screen utilization rate can be increased, and the purification efficiency can be guaranteed.

The invention relates to an air purification method and system fused with AI intelligent big data analysis, and solves the problem that the purification effect is greatly reduced due to the fact that an air purifier cannot adjust operation parameters in time according to upcoming air quality changes in the operation process. The method comprises the following steps: inputting real-time gas related data and gas related data in a historical past time range into a pre-trained air quality prediction model, and outputting an air quality prediction result in a future preset time range; and the mode set by the user about the air purifier and the air quality prediction result in the future preset time range are input into the air purifier operation parameter optimization model, the optimized air purifier operation parameters are output, and the air purifier is indicated to perform corresponding operation according to the optimized air purifier operation parameters. The intelligent air purifier has the following effects that precise and intelligent air purification is achieved, the indoor air quality is effectively improved, and various requirements are met.

The invention relates to an intelligent multi-dimensional air purification cloud intelligent control method and system, and solves the problem that the complexity of an indoor environment, such as temperature and humidity, concentration of other pollutants and factors of different sensitivities of a user to air quality, cannot be comprehensively considered due to the fact that operation of a purifier is adjusted simply according to a single air quality index. The method comprises the following steps: analyzing a voice control instruction to extract key information, analyzing the extracted key information, real-time air quality data and air quality trend information in a future preset time range, inputting the information into an intelligent decision algorithm model of a cloud end, and outputting operating parameters needing to be adjusted of the air purifier, forming a parameter adjustment decision instruction; the formed parameter adjustment decision instruction is issued to an air purifier terminal through a network; and the air purifier responds to the parameter adjustment decision instruction to adjust the operation parameters of the air purifier. The method has the following effects that the air quality is improved, and the requirement of a user for the indoor air environment is met.

The invention provides an air conditioner and a control method and device thereof, a storage medium and a computer program product, and the method comprises the following steps: detecting whether a person is in a room or not, and detecting whether a pet exists in the room or not when it is detected that no person is in the room; if it is detected that the pet exists, the air conditioner is controlled to be switched to a preset mode; collecting an image of the pet; determining whether the pet has a preset behavior or not according to the collected image of the pet; if it is determined that the pet has the preset behavior, an air conditioner and / or an air purifier in the air conditioning system are / is controlled; and / or, acquiring hair humidity detection data of the pet; according to the acquired hair humidity detection data of the pet, judging the dry and wet state of the hair of the pet; and controlling an air conditioner and / or a dehumidifier and / or a humidifier in the air conditioning system according to the judged dry and wet state of the hair of the pet. According to the scheme provided by the invention, the comfort level of the pet in indoor life can be improved.

1. The name of the product of this design: Air Purifier (No. 868). 2. Purpose of this design product: used in air purifier. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: Stereoscopic diagram 2.

A direct plug-in air purifier, including a front shell, a rear shell, an air ionizer, a fan, and a front cover. The front shell includes a recessed portion configured to hold a mechanical air filter. The rear shell is attached to the front shell and includes an air outlet. The air ionizer and the fan are disposed in a space defined between the front shell and the rear shell. The front cover is releasably attached to the front shell and configured to allow air to pass therethrough. The fan is configured to draw air through the front cover, the mechanical filter, and an air guide formed in the recessed portion, and to expel air through the air outlet.

The invention provides an intelligent pet air purifier and a control method. The intelligent pet air purifier comprises a purification module, a camera module and a control module. The purification module is used for purifying air; the camera module is used for capturing a pet and an environment and generating image information; and the control module is used for controlling the intelligent pet air purifier to follow the pet and purify air along the way according to the image information. The control method comprises the steps that the control method is controlled by a starting instruction for starting the intelligent pet air purifier, and the working mode of the intelligent pet air purifier is confirmed; if the working mode of the intelligent pet air purifier is a following mode, the state of a pet is captured and confirmed; and if the state of the pet is the active state, following the pet and purifying air along the way. The pet air purification device can move along with a pet and purify air on the moving path, can be matched with the multi-moving state of the pet, and meets the requirements of a user.

The invention discloses an anaerobic microorganism fermentation device, and relates to the technical field of anaerobic microorganism fermentation, the anaerobic microorganism fermentation device comprises a fermentation assembly, the outer surface of the fermentation assembly is provided with a detection assembly; when the air purifier is used, aerobic gas is discharged through the gas outlet pipe and the diffusion pipe, the oxygen content is detected by the oxygen sensor, and when it is detected that the discharged aerobic gas is discharged, the gas enters the air purifier through the connecting pipe and the fixing pipe under the action of the flow guide plate to be subjected to air purification treatment. When oxygen-free gas is detected, the PLC can control the gas injection valve to be closed, a first electric one-way valve and a forward and reverse motor are started, the forward and reverse motor drives a rotating rod, a sealing plate and a sealing ring to rotate anticlockwise, a connecting pipe is blocked, and a flow guide plate guides the oxygen-free gas into a recycling pipe. The oxygen-free gas enters the fermentation tank again through the conveying pipe, the annular pipe, the gas inlet pipe and the gas injection pipe, waste of the oxygen-free gas is reduced, and the use efficiency is improved.

The invention relates to the technical field of air purifiers, in particular to a spinning special air purifier which comprises a shell, a fan, an electrostatic generator and an ozone ion generator, a supporting plate with the L-shaped cross section is fixedly connected to the interior of the shell, and a dust removal net plate and an air purification filter element are fixedly connected to the supporting plate; one side of the shell is fixedly connected with an air inlet screen plate; a reciprocating screw rod is rotatably connected to the upper inner wall of the shell, a cleaning assembly is arranged on the reciprocating screw rod, the cleaning assembly comprises a bending block in threaded connection with the reciprocating screw rod, an opening is formed in the upper surface of the bending block, a mounting block is arranged in the opening, and a cleaning brush is fixedly connected to one end of the mounting block. According to the air purifier, air penetrates through the air purification filter element to be purified and then discharged, the air purification treatment effect is good, the service life of the air purifier is prolonged, and use of the air purifier is facilitated.

The invention belongs to the technical field of air purifiers, and particularly relates to a filtering assembly for an air purifier, the filtering assembly comprises a main box body, and a drainage device is arranged in the main box body; the drainage equipment comprises a drainage bottom pump, and the top end of an output shaft of the drainage bottom pump is rotationally connected with airflow equipment through a drainage rod. The device can purify indoor air, dust is easily accumulated on the outer filter cartridge and the inner folded filter cartridge which are used for filtering the air, so that the purifier needs to be disassembled after being used for a period of time and is manually dedusted, and the purifier generally cannot be continuously used for a long time; and the inside of the device has a cleaning function, and floating ash attached to the outer part of the filter cartridge can be cleaned through the flushing work of the side drainage barrel and the drainage bottom pump, so that the filtering capacity of the barrel body is recovered, the disassembly work is not needed, and the simplification effect is realized.

The invention discloses an operation parameter regulation and control method and platform of an air purifier, and relates to the technical field of air purification. The method comprises the steps that real-time air detection data are obtained; performing purification demand evaluation, and generating an air purification instruction; activating the air purification regulation and control model to obtain an air purification regulation and control scheme; regulation and control prediction evaluation is conducted on the air purifier in the target space, and a purification regulation and control prediction evaluation result is obtained; judging whether the purification regulation and control prediction evaluation result meets the purification regulation and control prediction evaluation expectation or not; if not, an air purification regulation and control strategy is generated; and the air purifier is controlled according to the air purification regulation and control strategy. The technical problems that in the prior art, an air purifier is not flexible enough in regulation and control and cannot respond to the air quality change in real time, so that the air purification efficiency is low, and the energy consumption is high are solved, the operation parameters of the air purifier are dynamically adjusted according to the real-time air quality data, and the air purification efficiency is improved. The technical effects of improving the air purification efficiency and reducing the energy consumption are achieved.

The invention provides a data acquisition and analysis method of an intelligent sofa, which comprises the following steps: arranging an electrostatic sensor array on the intelligent sofa, and acquiring electrostatic signal intensity and polarity distribution, human body charge and environmental humidity data of different areas on the surface of the sofa in real time to obtain electrostatic distribution data; under different air quality conditions including pollutant concentration and particulate matter content, according to the electrostatic characteristic parameters, a mapping relation model of the electrostatic characteristic parameters and the air quality is trained through a support vector machine algorithm; inputting sofa static signal intensity collected in real time into the trained mapping relation model of static characteristics and air quality to obtain changes of the static characteristics, and evaluating indoor air quality in real time; if the evaluation result shows that the air quality is smaller than the air quality threshold value, an air purification device of the intelligent sofa is triggered, an air purifier is started, and the ventilation amount of a fresh air system is increased so as to improve the indoor air environment.

The embodiment of the invention provides an air purifier, a filter screen cleaning method of the air purifier and a medium. The air purifier comprises a filter screen. The first scraping and sweeping device is arranged on the outer side of the filter screen and used for scraping and sweeping the outer side of the filter screen; the ultrasonic device is used for emitting ultrasonic waves to the filter screen, so that the filter screen generates ultrasonic vibration; the second scraping and sweeping device is arranged on the inner side of the filter screen and used for scraping and sweeping the inner side of the filter screen; the dust suction device is used for sucking dust falling from the filter screen; the water spraying device is used for spraying water vapor to the filter screen; and the drying device is used for drying the filter screen after the water spraying device sprays the water vapor to the filter screen. Bidirectional physical cleaning is formed through the first scraping and sweeping device on the outer side and the second scraping and sweeping device on the inner side, dust in the deep layer of the filter screen is loosened and falls off in combination with ultrasonic vibration, the cleaning efficiency is remarkably improved, drying is conducted through the drying device, microorganisms are prevented from breeding in the humid environment, meanwhile, the filtering efficiency of the filter screen is prevented from being affected, and the service life of the filter screen is prolonged.

The invention belongs to the technical field of performance detection of air purifiers, and particularly relates to a formaldehyde decomposition conversion rate testing device and method for an air purifier, and the device comprises a testing cabin which is used for placing a testing prototype and filling formaldehyde gas; the formaldehyde gas source is communicated with the test cabin and is used for introducing formaldehyde into the test cabin; the circulation module is used for gas circulation in the test cabin; the temperature and humidity adjusting module is communicated with the test cabin, and the temperature and humidity adjusting module is matched with the circulation module to adjust the temperature and humidity of the gas; the formaldehyde concentration detection module is used for detecting the formaldehyde concentration in the test cabin; the carbon dioxide detection module is used for detecting the carbon dioxide concentration in the test cabin; and the tail gas treatment module is communicated with the test cabin and is used for treating and discharging gas in the test cabin after the test is finished. According to the invention, the formaldehyde decomposition conversion rate and the formaldehyde removal rate of the test prototype can be measured.

The invention discloses a centrifugal fan for a cooling tower, and belongs to the technical field of fan equipment, the centrifugal fan comprises a base, the upper end of the base is fixedly connected with a centrifugal fan body, the rear end of the centrifugal fan body is provided with a first motor, the first motor is arranged at the upper end of the base, and the first motor is used for driving the centrifugal fan body; and an air outlet pipe is arranged at the upper end of the centrifugal fan body. Dust is filtered through the arranged filter screen, when the filter screen is cleaned, air flow on one side of the shell can be blocked through the flow separation plate, then the filter screen is cleaned through the cleaning assembly, and therefore during cleaning, dust cannot be subjected to the effect of the air flow and cannot be strongly attached to the upper end of the filter screen, and the dust removal effect is improved. According to the air purifier, dust can be effectively cleaned, the air inlet effect is guaranteed, the filtering assemblies are arranged on the left side and the right side, air can be fed through the other side when one side is cleaned, the machine does not need to be shut down for cleaning, and the using effect is improved.

The invention relates to the technical field of environment monitoring, in particular to a multifunctional air quality monitoring and early warning system, which comprises a monitoring and adjusting module, a monitoring and early warning module, a monitoring and early warning module, an early warning module and an early warning module, and is characterized in that the monitoring and adjusting module monitors pollutants and temperature and humidity information in air through various sensors and automatically adjusts sensor detection ranges according to air quality conditions; the intelligent early warning module is used for establishing a prediction model, pre-judging the deterioration trend of the indoor air quality in advance through the prediction model, and triggering trend early warning when monitoring that the deterioration risk is high; and the equipment linkage module is used for establishing an equipment linkage rule base and automatically matching an optimal equipment operation strategy according to the air quality data. Various high-precision sensors are integrated, multi-dimensional data of particulate matter, harmful gas, oxygen content and temperature and humidity in air can be comprehensively monitored, the indoor air quality condition is accurately reflected, an air purifier and fresh air system equipment are automatically allocated according to a data analysis result, and intelligent environment adjustment is achieved.

The invention relates to the technical field of air purification, and discloses a filter screen assembly, an air purifier and a control method and a control device of the air purifier, the filter screen assembly comprises a fixing structure, a filter screen fixing structure and a control structure, the fixing structure comprises a fixed filter screen, and the fixed filter screen is cylindrical; the primary filtering structure is provided with a first end and a second end, the first end and the second end are suitable for being in butt joint in the circumferential direction of the fixed filter screen so that the primary filtering structure can surround the fixed filter screen, and the first end and the second end are detachably connected and / or the primary filtering structure and the fixed structure are detachably connected. When the primary filtering structure needs to be detached for replacement or cleaning after being used for a period of time, the first end and the second end are separated, or after the first end or the second end of the primary filtering structure is separated from the fixing structure, the primary filtering structure is unfolded on the outer side, and therefore the primary filtering structure is detached from the fixing structure; and the primary filtering structure is convenient to disassemble.

The utility model discloses an air purification module applied to an air conditioner, the air conditioner is provided with a return air inlet and an air outlet, the air purification module comprises a mounting frame and a filtering device, and the filtering device is arranged on the mounting frame, corresponds to the return air inlet and is used for filtering air flowing into the return air inlet; the air purification module further comprises an air guide plate, and the air guide plate is arranged on the installation frame, corresponds to the air outlet and is used for guiding airflow flowing out of the air outlet. According to the utility model, the placing pressure is not increased, and the device is combined with the air conditioner to be used, so that indoor air is purified, fins of the air conditioner are protected to be clean, cleaning of the air conditioner is reduced, and microorganisms such as bacteria and molds in the air are reduced; meanwhile, air flowing through the air conditioner can be filtered at a time, the air outlet direction of the air conditioner is gently changed, and the problems that an existing air purifier is large in noise, large in occupied indoor space and low in air circulation efficiency are solved.

Embodiments herein describe a method including using one or more air quality sensors and an air purifier to detect and adjust air quality within a structure having a heating, ventilation, and air conditioning (HVAC) system, the air purifier having a first variable speed fan in an intake channel and a second variable speed fan in an exhaust channel, and, in response to detecting an adverse air quality event within the building envelope by one or more sensors, automatically adjusting a speed of the first variable speed fan and a speed of the second variable speed fan (i) to maintain an air flow ratio between air inflow and air outflow within the HVAC system, (ii) to introduce increased fresh and filtered air flow from outside, (iii) to increase filtration of indoor air, (iv) to monitor the ERV and filter performance, and (v) to send relevant maintenance notifications to the user.

The invention provides an air purification method and device based on big data, electronic equipment and a storage medium, and relates to the technical field of data processing. The air purification method based on the big data comprises the steps that indoor air data detected by a plurality of air purifiers and environment sensing data detected by a plurality of associated sensors are obtained, and the actual air quality change trend is determined according to the indoor air data and the environment sensing data; according to the actual air quality change trend, the initial air pollutant concentration, the highest pollutant concentration and the air quality change attribute are determined, and the overall air quality in the current environment is determined according to the initial air pollutant concentration, the highest pollutant concentration and the air quality change attribute; according to the actual air quality change trend, the indoor air data and the environment sensing data, a pollution source and a corresponding pollution source type are determined; and according to the air influence data, the overall air quality, the pollution source and the pollution source type in the preset distance range, a target purification mode is determined.

The present disclosure relates to a negative ion generating device and an air purifier. The negative ion generating device includes a housing, a negative ion assembly, and a cleaning assembly. The negative ion assembly is arranged to the housing, and the negative ion assembly includes a conductive fiber brush. The cleaning assembly is arranged to the housing, the cleaning assembly includes a driving mechanism and a cleaning member, and the cleaning member can move under action of the power provided by the driving mechanism, and contact or separate from the conductive fiber brush during movement.

The invention discloses an AI-based air purifier intelligent control method and system, and the method comprises the steps: obtaining air environment data, positioning a pollution source, generating a particle distribution matrix, and dividing an indoor region into a high particle cluster and a low particle cluster; if the number of the high particle clusters exceeds a threshold value, analyzing the regional purification priority, optimizing the distribution of purification equipment, and generating an equipment transfer scheme; planning a transfer path and optimizing a transfer scheme, deploying purification equipment and calculating purification efficiency, and if a purification target is reached, generating an equipment deployment scheme; acquiring local air data of each device in the deployment scheme; calculating device operation efficiency and optimizing device operation parameters; calculating an airflow influence value of a near area; adjusting the device operation parameters to enable the influence value to be smaller than a threshold value and issuing parameters to each purification device; the purification effect is evaluated, and a control instruction of the next period is generated. According to the method, the air quality change can be responded in time in a complex environment.

The invention discloses a method for preparing a micro-particle-size negative oxygen ion purifying agent from a nano material, and relates to the technical field of air purifying agents, the method comprises the following preparation steps: step 1, pouring 5-6.5 g of modified tourmaline powder and 10 g of an amino acid-nano particle compound into 200 mL of deionized water, then adding 0.5-0.54 g of polyvinylpyrrolidone, carrying out ultrasonic treatment for 30-40 min, then adding 0.5-0.54 g of polyvinylpyrrolidone into the deionized water, carrying out ultrasonic treatment for 30-40 min, and carrying out ultrasonic treatment for 30-40 min; carrying out ball milling until the particle size is 1-5 microns; 2, adding 2-2.6 g of a chitosan solution with the concentration of 1% after ball milling, adjusting the pH value of the system to 6, and stirring at 50 DEG C for 1 h; according to the method for preparing the micro-particle-size negative oxygen ion purifying agent from the nano material, tourmaline powder is modified, so that the surface hydroxylation degree of the tourmaline powder is improved, lattice defects are increased, the negative oxygen ion release efficiency is remarkably improved, meanwhile, the tourmaline powder is compounded with white carbon black, interface charge conduction can be enhanced, and continuous release of negative oxygen ions is further promoted.

The utility model provides a humidifying device and an air purifier. The humidifying device comprises a water tank, a wet curtain assembly and a water level monitoring and water path module, the water level monitoring and water path module comprises a separation cover arranged in the water tank and provided with a separation cavity extending from the bottom of the separation cover to the top of the separation cover, and a water inlet used for communicating the separation cavity with the water tank is formed in the bottom of the separation cover; a water return port communicated with the separation cavity is formed in the top of the separation cover, so that redundant water of the wet curtain assembly flows back to the separation cavity through the water return port; the water level monitoring assembly is arranged in the separation cavity and used for monitoring the water level in the separation cavity; the water pump is arranged in the partition cavity and used for feeding water in the partition cavity into the wet curtain assembly. According to the humidification device, redundant water of the wet curtain assembly flows back into the separation cover, due to the fact that the space in the separation cover is small, the redundant water can flow along the inner wall of the separation cover more easily, water surface fluctuation caused by splashing is avoided, and then the monitored water level is accurate.

The invention belongs to the technical field of waste gas treatment, and discloses a treatment device for waste gas containing dichloromethane. Comprising a filter pipe, an adsorption pipe and a communicating pipe, a stainless steel mesh and a non-woven fabric are arranged in the filter pipe, two filter screens are fixedly connected in the adsorption pipe, and the air purifier further comprises an air inlet area and an air outlet area which contain activated carbon particles. By arranging the driving assembly, after activated carbon particles are adsorbed for a period of time, a sealing plate is opened firstly, a first motor is started, the first motor drives a second rotating shaft and a second bevel gear to rotate, the second bevel gear drives the first rotating shaft to rotate through the first bevel gear, and the first rotating shaft can drive two spiral blades to rotate; the two spiral blades enable the activated carbon particles in the air inlet area to enter the air outlet area through the second through opening, and the activated carbon particles in the air outlet area enter the air inlet area through the first through opening, so that the activated carbon particles are driven to move in the adsorption pipe, and the purpose that the activated carbon particles in each section can fully and uniformly adsorb impurities is achieved.

The invention discloses a workshop air purification dehumidifier, and belongs to the technical field of dehumidification, the workshop air purification dehumidifier comprises a machine body, the machine body is provided with a through air cabinet pipe, the air cabinet pipe is internally provided with a ventilation pipe, one end of the air cabinet pipe is provided with a fan matched with the ventilation pipe, the other end of the air cabinet pipe is provided with an air inlet, and the air cabinet pipe is internally provided with a transition mechanism; and a pre-cleaning mechanism is arranged in the ventilation pipe. According to the device, through the passing groove defined by the air inlet and the adjusting blocks and the design of multiple sections of different diameters of the ventilation pipe, a section of Venturi pipeline with the inlet shrunk and then gradually enlarged is formed from the air inlet to the ventilation pipe, on the premise that the power of the fan is not increased, the air inlet flow is accelerated, kinetic energy is converted into negative pressure energy through the Bernoulli effect, and the energy efficiency is improved. The high-speed low-pressure area of the throat remarkably increases the suction force at the inlet of the air inlet, and the suction efficiency of heavy impurities such as water vapor suspended in a workshop is improved, so that the overall purification efficiency is improved.

The utility model discloses a flow guide cover of an air purifier, the flow guide cover is arranged in an airflow channel of the air purifier, the whole flow guide cover is a hemispherical cambered surface, and the cambered surface is a net-shaped air passing opening formed by connecting a plurality of annular ribs and radial ribs with certain widths; the annular ribs and the radial ribs face the sphere center of the cambered surface in the width direction; air flow flows in the direction of the sphere center of the arc face along the peripheral face of the arc face. According to the air purifier, the flow guide cover is arranged in the air flow channel of the air purifier and collects air flow in all directions into the hemispherical cambered surface of the flow guide cover, so that impact and collision between the air flow and a fan in the air purifier are reduced, and the noise of the air purifier can be effectively reduced.