311 results about "Air cleaner" patented technology

An air filter for an air filter assembly in an air conditioner is provided, in particular for filtering out particles, preferably pollutants, from air. The air filter contains a filter element with an electrically conductive layer. The air filter also has a housing that partially encompasses a housing interior into which the filter element is inserted. The air filter also has a terminal on the housing that can be contacted from outside the housing interior, which is made of an electrically conductive material and is connected to the conductive layer of the filter element.

Air inlet holes are formed in the surface of the air filter, the self-cleaning air filter comprises a cleaning device, the cleaning device comprises a cleaning frame arranged outside the air filter in a sleeving mode, the cleaning frame is detachably provided with a cleaning brush, and bristles of the cleaning brush abut against the outer wall of the air filter. The cleaning device comprises a driving assembly in transmission connection with the cleaning frame, and the driving assembly drives the cleaning frame to drive the cleaning brush to rotate in the circumferential direction of the air filter so as to brush off sundries at the air inlet holes. In the rotating process of the cleaning frame, the cleaning brush is driven to rotate around the outer wall of the air filter in the circumferential direction, sundries attached to the air inlet holes in the outer wall are cleaned, the situation that the sundries block the air inlet holes is avoided, the cleaning brush conducts cleaning work in the working process of the air filter, the air inlet holes are kept not blocked in the working process of the air filter, and the service life of the air filter is prolonged. The air filter can work stably and reliably, manual cleaning is not needed, the work efficiency can be improved, and potential safety hazards existing in manual operation are avoided.

The invention discloses a constant-resistance maintenance-free air filter powered by a vehicle gas turbine. The constant-resistance maintenance-free air filter comprises an air inlet waterproof unit, an inertia separation unit, a dust extraction system and a gas turbine air inlet connecting section. The air inlet waterproof unit, the inertia separation unit and the gas turbine air inlet connecting section are sequentially connected in a sealed mode. A grating is arranged at the upstream end of the air inlet waterproof unit, and a drainage hole is formed in the bottom of the air inlet waterproof unit; the grating is used for intercepting water in external air; water is discharged from the drainage hole; a dust collection cavity and a straight-flow type rotational flow pipe set are arranged in the inertia separation unit, the straight-flow type rotational flow pipe set is used for separating air and dust, the separated dust enters the dust collection cavity, and the separated air enters the gas turbine through the gas turbine air inlet connecting section; the dust suction system is connected with the inertia separation unit, communicates with the dust collection cavity and is used for sucking out dust in the dust collection cavity, a filter element is not needed, and the problems that resistance of a traditional filter element is increased due to dust accumulation, and an air filter is fast to block and needs to be frequently maintained in a high-dust environment are solved.

The embodiment of the invention provides a fuel cell gas supply system and a gas supply method, and relates to the technical field of cells. The air supply system comprises an air filter, a turbocharger, a three-way proportional valve, an air compressor, a three-way valve and an electric pile of a fuel cell; the electric pile comprises a cathode inlet and a cathode outlet; the three-way proportional valve comprises an inlet, a first channel and a second channel; the three-way valve comprises an inlet, a first channel and a second channel; an outlet of the air filter is connected with a first branch and a second branch, the first branch is connected to an inlet of the three-way proportional valve, the second branch is connected with a second channel of the three-way proportional valve through the turbocharger, and the first channel of the three-way proportional valve is connected with a cathode inlet of the electric pile through the air compressor; a cathode outlet of the electric pile is connected to an inlet of the three-way valve, a first channel of the three-way valve is used for direct exhaust, and a second channel of the three-way valve is used for exhaust through the turbocharger. Therefore, the fuel cell can stably supply air, and the energy consumption of the air compressor is effectively reduced.

The utility model relates to the technical field of filters, and particularly discloses an air filter with lugs on a frame. The filter comprises a frame, a filter element and a sealing ring, the filter element is arranged in the frame, a convex edge is arranged on the peripheral wall of the frame, and a positioning convex block is arranged at the bottom of the convex edge of the frame; the sealing ring is arranged on the periphery of the frame in a sleeved mode, a first groove connected with the protruding edge in a matched and clamped mode is formed in the inner circumferential wall of the sealing ring, and a second groove connected with the positioning protruding block in a matched and clamped mode is formed in the first groove. When the sealing ring is assembled on the frame in a sleeved mode, the protruding edge of the frame is clamped in the first groove of the sealing ring, and meanwhile the included positioning protruding block is clamped in the second groove of the sealing ring, so that the sealing ring is stably connected to the frame of the filter in a sleeved mode. The problem that sealing is not tight due to the fact that a sealing ring is prone to deformation, displacement and even disengagement in the installation and use process is solved.

The present invention relates to a pressure edge frame device for testing filter elements. The device comprises a frame structure formed by assembling a plurality of square pressure strips. Adjacent square pressure strips are connected by angle fixing plates, bolts, and nuts. Long holes for the bolts to pass through are provided in the middle of the square pressure strips. The bolts pass through the long holes of the square pressure strips and are connected to the nuts and can be adjusted in position to change the size and shape of the pressure edge frame device. Compared with the prior art, the device adjusts the size by adjusting the position of the bolts and nuts along the long holes of the square pressure strips. This avoids the need for pressure plates of different sizes to be configured for filter elements of different sizes during testing, resulting in a large number of pressure plate specifications, high costs, and complex processing. By providing beveled pressure strips and adjusting the positions of the bolts and nuts, the shape can be adjusted. The device is suitable for performance testing of quadrilateral, non-square, or polygonal flat-plate air filter elements for automobiles, and solves the problem of long tooling preparation cycles for filter element verification.

The utility model relates to the technical field of vehicles, and provides an air inlet silencer, an air inlet system and a vehicle, the air inlet silencer is used for the air inlet system of the vehicle, the air inlet silencer comprises a shell with an inner cavity, the inner cavity forms a resonant cavity, the shell is provided with an air inlet and an air outlet which communicate with the resonant cavity, the air inlet is used for communicating with an air filter, and the air outlet is used for communicating with an air outlet. The air outlet is communicated with an engine. According to the scheme, the problem that in the prior art, noise of an engine air inlet system is large can be solved.

The application relates to the technical field of electrical equipment, and discloses an air purifier, a sterilization and disinfection method and device of the air purifier, wherein the sterilization and disinfection method of the air purifier comprises the following steps: receiving an opening instruction of a plasma generating device; when the opening instruction of the plasma generating device is received, intermittently controlling the plasma generating device to work. That is, after the plasma generating device works for a period of time, the plasma generating device stops working, and then restarts working, and the working and stopping are repeated; when the plasma generating device stops working, not only can the plasma generating device be cooled, but also there is no dielectric loss, so that the temperature of the plasma generating device itself is reduced, and the problem that the filter screen material close to the plasma generating device is damaged can be solved.

This utility model belongs to the field of gasoline engine technology, and in particular to a multi-layer filtered intake gasoline engine, including a protective shell. A gasoline engine body is fixedly installed on one side inside the protective shell, and a mounting box is fixedly installed on the left side of the protective shell. A movable plate is installed on the left side of the mounting box, and an air filter is installed inside the mounting box. The air filter inside the mounting box filters the air drawn into the gasoline engine body, preventing dust from being drawn into the engine body, resulting in cleaner air and preventing dust from clogging the intake pipes. This leads to more powerful gasoline engines. Furthermore, the intercooler reduces the intake temperature of turbocharged engines, improving charging efficiency by cooling the high-temperature compressed air, ensuring stable engine operation, and reducing fuel consumption, thus enhancing the practicality of the device.

The utility model relates to the technical field of vehicles, in particular to a support structure, a braking system and a vehicle. The support structure comprises a first mounting assembly and a second mounting assembly, the first mounting assembly comprises bearing pieces and connecting pieces arranged in pairs, the connecting pieces arranged in pairs are arranged at intervals in the X direction, the bearing pieces are connected between the connecting pieces arranged in pairs, the connecting pieces are used for being connected with a frame longitudinal beam, and the bearing pieces are used for being connected with an air compressor; the second mounting assembly is connected to one of the connecting pieces arranged in pairs, the second mounting assembly is arranged on the side, away from the bearing piece, of the connecting piece in the X direction, the second mounting assembly comprises a first mounting piece and a second mounting piece, the first mounting piece and the second mounting piece are sequentially arranged in the Y direction, the first mounting piece is used for being connected with a dryer, and the second mounting piece is used for being connected with the dryer. The second installation part is used for being connected with an air filter. According to the support structure, the space utilization rate can be increased, wiring harness arrangement is simplified, and therefore the safety and reliability of a vehicle are improved.

The invention relates to the technical field of air purification, in particular to an air filter device for preventing and controlling atmospheric pollution, which comprises a casing, a mounting hoop and a plurality of through grooves formed in the outer side of the casing, a plurality of arc-shaped plates are arranged on the inner side of the casing and form a cylinder, flexible filter plates which are connected with one another are arranged on the outer sides of the arc-shaped plates, and the through grooves are formed in the outer side of the casing. According to the air filter device for preventing and treating the atmospheric pollution, the arc-shaped plates are driven to deform through the arranged filter adjusting mechanisms, the flexible filter plates connected with one another are driven to stretch out and draw back synchronously, and therefore the air filter device for preventing and treating the atmospheric pollution can be used for preventing and treating the atmospheric pollution; when the pollution concentration suddenly rises, the filtering area can be increased, the filtering speed is prevented from being too high, the pressure drop suddenly rises and the filtering efficiency is prevented from being reduced, when the concentration is low, the area is reduced, the filtering capacity redundancy is reduced, the energy consumption and the operation and maintenance cost are reduced, and the filtering requirements in different environments are met.

The utility model discloses a hybrid mine car and an electric air compressor air taking arrangement structure thereof. The electric air compressor air taking arrangement structure comprises an electric air compressor, and an air compressor air inlet of the electric air compressor is connected with an air taking opening in the side face of an air inlet steel pipe through a connecting rubber pipe III; the two ends of the air inlet steel pipe are connected with an engine air filter and an engine turbocharger correspondingly, and the engine air filter serves as a compressed air source of the electric air compressor. According to the electric air compressor, air is directly taken from the rear portion of the engine air filter, compared with an air filter additionally arranged on an air compressor in the prior art, the impurity and moisture filtering effect of air filtered by the engine air filter is better, the air is cleaner, and therefore the service life of related parts is prolonged, and the cost is reduced. And meanwhile, the reliability of related parts is improved to a great extent.

The air outlet pipe capable of reducing the air leakage noise of the anti-surge valve comprises a first end, a second end and a pipe body, the first end and the second end are the two ends of the pipe body, the first end is connected with the anti-surge valve, the second end is connected with an air inlet pipe of a supercharger, the air inlet pipe of the supercharger is of a 90-degree bent angle structure, and the air outlet pipe of the supercharger is connected with the anti-surge valve. The first end comprises an air inlet and an air outlet, the air inlet is used for being communicated with an air filter, the air outlet is used for being communicated with a supercharger, and the second end is arranged at the outer corner of the corner structure and partially extends into the corner structure so as to guide air leakage flow from the first end to the direction of the air outlet of the corner structure. The air outlet pipe is simple in structure and good in noise reduction effect, and the customer experience is improved.

The application provides a multistage air guide air purifier air duct device, and relates to the technical field of air purifiers, which comprises a lower shell, an upper cover arranged on the lower shell, a filtering mechanism arranged in the lower shell for filtering air, a spiral mechanism arranged in the filtering mechanism for air flow rectification and sterilization, a fan support arranged in the upper cover, and a direct current motor mounted on the fan support. In the application, a specially designed rear guide booster blade (the number of blades is set to 1.2-1.5 times the number of centrifugal fan blades, and the number of blades can be selected as 7, 9 or 11 odd blades) is fixedly installed on the inner wall of the fan support, the number ratio of the centrifugal fan and the rear guide booster blade is accurately determined by means of modal analysis technology, the integer multiple of the rotation frequency of the centrifugal fan is avoided, the resonance phenomenon in the equipment operation process is effectively inhibited (the amplitude is reduced by 30%), and the windward surface curvature radius R of the rear guide booster blade is matched with the rotation direction of the centrifugal fan.

An assembly for a snowmobile includes an airbox having a plenum for coupling to a throttle body of an engine and two branches defining openings for air intake. A storage box is mounted between the two branches and defines area for receiving a console. The airbox is part of a hood of the vehicle and includes an opening over a storage box. The disclosure also includes a ribbed bumper mount with a latch assembly for securing the hood.

The invention belongs to the technical field of automobile manufacturing, and discloses a chassis assembly and a heavy truck. The device comprises a main body beam, a first support and a second support, the first support and the second support are installed on the main body beam, an air filter is clamped between the first support and the second support, and a fender is installed on the side, away from the air filter, of the first support; the problems that in the prior art, a support for installing an air filter and a fender needs to be independently installed and subjected to mold opening, and the manufacturing and installing cost is high are solved.

The utility model discloses an air filter assembly, belongs to the technical field of filters, and solves the problem that an air inlet pipe of an existing air filter assembly is insufficient in structural strength and connection reliability. The air inlet pipe comprises a prefilter and a main filter, the air inlet pipe is of a flat structure and comprises a rubber pipe and a high-position pipe which are arranged in a split mode, the rubber pipe is a bent pipe, one end of the rubber pipe is fixedly connected with an air inlet of the prefilter, and the other end of the rubber pipe is detachably connected with the high-position pipe. The high-position pipe is vertically arranged and extends to the position above the main filter, a rainproof cap is detachably installed at the end, away from the rubber pipe, of the high-position pipe, a first reinforcing column connecting the two side walls of the rubber pipe is arranged in the rubber pipe, and a second reinforcing column connecting the two side walls of the high-position pipe is arranged in the high-position pipe. According to the air filter assembly, the connection reliability and the structural strength of the air inlet pipe can be improved at the same time, and then the service life and the air inlet efficiency of the air filter assembly are guaranteed.

This utility model discloses an intake system for a general-purpose engine, including an air filter and an air-fuel mixing device. An intake pipe connects the outlet of the air filter to the inlet of the air-fuel mixing device. Inside the intake pipe, an intake channel and a guide channel are sequentially arranged along the airflow path. The guide channel is curved, with a smooth transition between its inlet and outlet ends. The outlet end of the guide channel faces the inlet of the air-fuel mixing device. A guide groove extending along the airflow path is provided on the outer circumference of the guide channel, with its end gradually extending towards the inner circumference of the guide channel. This solution provides an intake system, different from existing technologies, that addresses the problem of uniform air-fuel mixing.

The utility model relates to a filter element mounting structure of an air purifier, which comprises a base arranged at the top of a bottom shell, a cavity is formed in the bottom shell, an air inlet communicated with the cavity is arranged at the bottom of the shell, a base capable of moving up and down is arranged at the bottom of the cavity, and an area for mounting an air filter element is formed between the base and the top of the cavity. An opening in the top of the air filter element is in butt joint with the air inlet, a filter element unit is arranged on the peripheral side of the air filter element, air can pass through the filter element unit, and a ventilation structure is arranged on the side wall of the bottom shell. The filter element mounting structure can ensure that the air filter element is not easy to shift after being mounted, and can be conveniently and accurately mounted when the air filter element is mounted.

The invention discloses a shutdown automatic dust removal system capable of actively discharging dust and back-blowing an air filter in a high-dust environment. The system comprises a resistance indicator, a pulse electromagnetic valve, a dust collection and extraction pump, a dust collection box, a dust collection pipeline with a valve and a push rod, and a controller. The controller monitors downstream resistance Px of the air filter in real time; when Px exceeds the parking working condition criterion Pt and the duration is longer than t2, immediately starting a back flushing process, and driving a pulse electromagnetic valve and a dust pump to complete dust removal according to three set modes (simultaneous, way-by-way or grouping); the Px is monitored in parallel at a higher frequency in the back flushing process, if the Px falls back, the operation is continued, and otherwise, the operation is stopped immediately; according to the system, falling dust is forcibly discharged out of the closed power cabin through the dust collection box and the independent dust suction pipeline, high-frequency and high-efficiency reverse blowing and dust discharging in a high-dust-limit environment are achieved, it is ensured that the air inlet resistance of an engine is always within a safe range, and the purposes of maintenance-free, continuous maneuvering and economical operation are achieved.

The application relates to a simulation test system for a fuel cell engine turbocharger, which comprises a compressor, a turbine, a motor, an air bearing, an air filter, an intercooler, an air source assembly, a motor controller, a motor driving power supply and a host computer; the compressor is installed on an air inlet channel of the fuel cell engine; the turbine is installed on an air outlet channel of the fuel cell engine; a rotor of the motor is coaxially connected between the turbine and the compressor; the air bearing is installed between blades of the compressor and / or blades of the turbine and a shell; an air outlet end of the air filter is connected with an air inlet end of the compressor; an air inlet end of the intercooler is connected with an air outlet end of the compressor, and an air outlet end of the intercooler is connected with an air inlet end of the turbine; an air outlet end of the air source assembly is connected with the air bearing; the motor controller is electrically connected with the motor; the motor driving power supply is electrically connected with the motor controller; and the host computer is communicatively connected with at least one of the air source assembly and the motor controller.

The application relates to the air purification technical field, in particular to a clean room air purifier, which comprises a base, a hollow shell arranged on the base, a partition plate arranged in the shell, a filter cavity formed by the partition plate, the base and the shell, an air inlet hole connected with the filter cavity, activated carbon bags arranged around the filter cavity side wall at the air inlet hole, a dustproof device sleeved on the shell outside at the air inlet hole, a medicine tank arranged on the partition plate back, an atomizer arranged on one side of the medicine tank and communicated with a medicine tank pipeline, an air filter core arranged on the partition plate and covering the atomizer, a ventilation hole formed in the partition plate at the atomizer position, a fan arranged on the partition plate front face at the ventilation hole and used for blowing filtered air and atomized medicine, and the dustproof device is installed on the shell in a sleeving mode, can be conveniently disassembled and cleaned, the medicine is atomized by the atomizer, and the atomized medicine is blown out by the fan, so that the sterilization and killing effects can be realized.

The utility model discloses an air filter with a silencing structure, which relates to the technical field of air filters and comprises a barrel, an air inlet pipe is inserted at the top end of the barrel, an exhaust pipe is inserted at the bottom end of the barrel, and the top and the bottom of the barrel are connected with connecting shells. After the air filter is used for a certain period, dust accumulated in the air filter can be cleaned out through disassembly, use of the air filter is prevented from being affected, filter elements arranged in the two connecting shells can preliminarily filter dust particles entering the cylinder body from air, noise generated when the dust collides with the filter elements can be greatly reduced, and the air filter has good practicability. And after the cylinder body is separated from the connecting shell, the filter element in the connecting shell can be conveniently detached and replaced, so that the effect of saving cost is achieved.

The utility model provides a waste water circulation blower device which comprises a bottom frame, a top frame is arranged over the bottom frame, a rotor chamber is installed on one side of the upper surface of the top frame, an air filter is installed on the upper surface of the rotor chamber, and an air outlet pipe is installed on the lower surface of the rotor chamber. A detachable L-shaped pipe is installed at the end, away from the rotor chamber, of the air outlet pipe, the section, away from the air outlet pipe, of the L-shaped pipe is horizontally arranged, and a detachable straight cylinder is installed at the end, away from the air outlet pipe, of the L-shaped pipe. A plurality of pipe joints which are respectively connected with a plurality of independent aeration pipes in the sewage pool through one-way valves are equidistantly mounted at one section, close to the straight barrel, of the L-shaped pipe, a spring which is arranged in the length direction of the straight barrel is mounted in the straight barrel, and a piston which slides in a channel formed by the straight barrel and the L-shaped pipe is arranged on one side, far away from the closed end of the straight barrel, of the spring; the utility model has the following beneficial effect that the sewage circulation is uninterrupted under the condition that the air filter is not cleaned in time.

The application discloses a self-cleaning air filter for an automobile engine and relates to the technical field of vehicle filters.The self-cleaning air filter comprises a cap, a filter core and a base, the cap and the base are arranged above and below the filter core respectively, the cap is provided with an air inlet hole, the base is provided with an air outlet hole connected with an engine, a piston valve is arranged in the cap, an adjusting spring is arranged between the piston valve and the lower end of the cap, a cleaning device is arranged along the outer edge of the filter core, a transmission structure is arranged in the filter core, the piston valve is driven to move up and down through the transmission structure, so that the cleaning device can be driven to rotate along the outer edge of the filter core and move up and down.The self-cleaning air filter can start the cleaning device to perform self-cleaning without external power control or signal control, and can still operate when a circuit fault occurs, and has the advantages of simple structure, high practicability, low cost and the like, and the service life of the filter is effectively prolonged.

An air cleaner includes a blower, a circulator disposed downstream of the blower to adjust a wind direction of air discharged from the blower, and a moving device combined with the circulator and supported by the blower to be movable relative to the blower to change a disposition of the circulator, the circulator including a lower cover including a lower plate combined with the moving device and an outer plate spaced apart from a peripheral edge of the lower plate to form a suction port between the lower plate, an inner cover including a housing spaced apart from the lower plate toward an inner side of the circulator and an inner plate spaced apart from a peripheral edge of the housing and facing the outer plate, a motor supported by an inner side of the lower plate, a blower fan including a hub connected to the motor, a plurality of moving blades inclinedly extended from the hub toward the suction port, and a shroud extending in a circumferential direction to connect ends of the plurality of moving blades and facing the inner plate, an upper cover covering the plurality of moving blades to form a discharge port, and an outer side cover disposed at an outer peripheral edge of the upper cover.

The invention discloses a hydraulic system of a movable crucible firing furnace, belongs to the technical field of heavy equipment movement, and is used for driving a boiler protection outer cover to move between two furnace foundations along a rail. Comprising a hydraulic power module, a jacking and lowering execution component, a walking driving mechanism and an integrated control module. The walking driving mechanism comprises a plurality of supporting leg walking composite wheel assemblies which are directly connected with a supporting oil cylinder of the jacking and lowering execution component. The hydraulic power module supplies oil to each component through a pipeline; the integrated control module can sequentially control circulation of jacking, walking and lowering operation. Wherein the hydraulic power module is provided with an air filter and an oil return filter element device to form a cleaning and filtering system; the supporting leg walking composite wheel assembly integrates a driving wheel set, a driven wheel set and a walking hydraulic motor speed reducer, and the structure is compact. Synchronous jacking, stable walking and accurate lowering of the heavy-load outer cover are achieved, and the heavy-load outer cover jacking device has the advantages of being high in working efficiency, high in space adaptability, reliable in operation and long in service life.

The application discloses a compact series pulse back-flushing air filter equipped with a safety filter element, and belongs to the technical field of air filters. The compact series pulse back-flushing air filter equipped with the safety filter element is compact in structure, can solve the problem that the compact power cabin space of a special vehicle is difficult to replace a self-cleaning air filter, can realize the back-flushing self-cleaning function in the compact power cabin space of the special vehicle, and is equipped with the safety filter element. When air is filtered in a forward direction, the air flows into a main filter element shell from an air inlet pipe, and then is filtered by two stages of the main filter element and the safety filter element, and finally flows out from an air outlet of the safety filter element shell. When dust is back-flushed and cleaned, back-flushing air flows out from a nozzle and is discharged from a pressure relief port, so that the dust on the main filter element falls into a dust collecting hopper.

The application provides a method, device, storage medium and electronic equipment for maintaining an air filter. The method comprises: obtaining an air intake pressure of the air filter, wherein the air intake pressure is obtained by a pressure sensor installed at an air intake port of the air filter; determining an oil consumption degradation coefficient corresponding to the air filter according to the air intake pressure, wherein the oil consumption degradation coefficient reflects a difference between an actual oil consumption and a theoretical oil consumption; determining an oil consumption degradation amount according to the oil consumption degradation coefficient and the actual oil consumption, and determining an oil consumption degradation cost according to the oil consumption degradation amount; and generating a prompt information in a case where the oil consumption degradation cost is higher than a maintenance cost of the air filter, wherein the prompt information is used to prompt a user to maintain the air filter in time. The present scheme realizes timely maintenance of the air filter.

The application relates to an air purifier, an electrostatic dust removal mechanism and a control method thereof. The electrostatic dust removal mechanism comprises a support, a dust collecting electrode rotatably arranged on the support and used for dust collection, a cleaning piece movably arranged on the outer periphery of the dust collecting electrode, and a controller. The control method of the electrostatic dust removal mechanism comprises the following steps: detecting the dust collection quality of the dust collecting electrode; when the dust collection quality of the dust collecting electrode is less than a first threshold value, controlling the electrostatic dust removal mechanism to be in a dust collection mode, and controlling the dust collecting electrode and the cleaning piece to be fixed; when the dust collection quality of the dust collecting electrode is greater than or equal to the first threshold value and less than or equal to a second threshold value, controlling the electrostatic dust removal mechanism to be in a first cleaning mode, and driving the dust collecting electrode to rotate; and when the dust collection quality of the dust collecting electrode is greater than the second threshold value, controlling the electrostatic dust removal mechanism to be in a second cleaning mode, and driving the cleaning piece to move. The air purifier comprises the electrostatic dust removal mechanism. The air purifier, the electrostatic dust removal mechanism and the control method thereof meet the diversified cleaning demands of users.