69results about How to "Play a self-cleaning effect" patented technology

The invention relates to a forced seal ball valve. The forced seal ball valve is characterized in that a torque transferring gear set and a screw pressing mechanism are integrated on a valve ball base body (5), 90-degree opening and closing precise limiting is designed for a valve ball lower pivot and a valve body lower pivot cavity, a torsional spring (17) is mounted between a valve ball upper pivot and a valve rod, and the pre-tightening torque of the torsional spring (17) enables a valve ball assembly to shrink and be locked together within 90-degree stroke beyond a valve closing angle; and after the valve ball assembly runs to the closing angle, the valve closing torque of the valve rod is transferred to the screw pressing mechanism through the gear set, and forced seal is realized. When the valve is opened, the valve ball assembly first shrinks and is locked under the action of the torsional spring, and then runs for 90 degrees towards full openness. The valve is compact in structure and truly realizes non-friction opening and closing.

The invention discloses a universal preparation method for self-cleaning superhydrophobic paper, and is characterized in that the universal preparation method comprises the steps: dipping ordinary paper in a zinc oxide ethanol solution having a micro / nano hierarchical structure for 5-10 min, drying for 2-5 min at the temperature of 80-100 DEG C, then again putting into the zinc oxide ethanol solution, carrying out dipping treatment, and repeating the steps for 4-8 times; and carrying out low-surface-energy modification on the product with an ethanol or toluene solution of stearic acid with the concentration of 3-5%, to obtain the superhydrophobic filter paper. The preparation method of the self-cleaning superhydrophobic paper is simple, raw materials are cheap and easily obtained, a contact angle of the surface of the obtained paper with water is greater than 150 degrees and the roll angle is less than 5 degrees, the self-cleaning property is excellent, and industrialization production is easy.

The invention discloses a wear-resisting waterproof self-cleaning super-hydrophobic lotus leaf effect emulsion paint and a preparation method thereof. The wear-resisting waterproof self-cleaning super-hydrophobic lotus leaf effect emulsion paint is prepared from the following raw materials: polymer emulsion, a coalescing agent, a defoaming agent, an antifreezing agent, a wetting dispersant, a pH modifier, a preservative, a leveling agent, a thickening agent, pigment, filler, polymer micro powder and tap water. The wear-resisting waterproof self-cleaning super-hydrophobic lotus leaf effect emulsion paint disclosed by the invention has the advantages of better anti-fouling performance which can reach 1 grade or above, contact angle of 135 degrees or above, high hydrophobicity, good scrub resistance, good aging resistance and capability of maintaining the external wall as new for a long time; rainwater can instantly slip in a water drop form without internal seepage, the hydrophobic waterproofing function is stronger and the hydrophobic effect is durable; with a surface microstructure of the emulsion paint, dust cannot be effectively contacted with the wall surface, so that the aims of easiness in shedding and self-cleaning are achieved.

The invention discloses a novel round brush and a high pressure cleaning machine with the same and belongs the fields of cleaning equipment auxiliary parts and machines. The round brush comprises an upper sprayer and a lower sprayer which are mounted fixedly and integrally and which form a spraying cavity; the lower sprayer is fixedly provided with a brush disc provided with a plurality brush hairs, and the brush disc is provided with a plurality of water discharging holes among the brush hairs; the lower sprayer is connected to a water incoming pipe, and the water outlet of the water incoming plate extends into the spraying cavity; the upper sprayer is provided with an air incoming channel communicating with the spraying cavity, and a pressurizer pressurizing the air flow entering the spraying cavity is arranged between the air incoming channel and the water outlet of the water incoming pipe and is located in the spraying cavity. The round brush has the advantages that energy and water are saved, the brushing effect is fine, a vehicle can be protected and the service life is long, and the round brush is widely applied to vehicle washing.

The invention relates to the technical field of coatings, in particular to a finishing coat and a preparation method thereof. The finishing coat comprises the following raw materials in parts by weight: 15-20 parts of film-forming emulsion, 0.8-1.2 parts of film-forming auxiliary agent, 5-10 parts of hydrophobic agent, 1.5-2.3 parts of cellulose ether thickening agent, 0.2-0.8 part of preservativeand 60-80 parts of water, wherein the hydrophobic agent is hydrophobic agent LC-808 produced by Shandong Lugong. The finish paint has good waterproof, stain-proof, waterproof and other properties, can be used for repairing wall surfaces and protecting paints such as true stone paint, and has better environmental protection.

The invention belongs to the technical field of noise abatement, and particularly relates to a self-cleaning type sound barrier. The sound barrier comprises at least two vertical columns which are arranged in parallel. At least one sound barrier plate block is arranged between every two adjacent vertical columns, and the two side edges of each sound barrier plate block are fixed to the vertical columns correspondingly, and the sound barrier is characterized in that the surfaces of the vertical columns and / or the sound barrier plate blocks are coated with nano titanium dioxide photocatalyst coatings, the sound barrier can be maintained to be clean by being washed with normal clean water or rainwater, thus the self-cleaning effect is achieved. Meanwhile, the organics exhausted by a car canbe degraded to some extent, and an environmental protection function is achieved at the same time.

The invention discloses an efficient self-cleaning energy-storage illuminating light reflection film. The efficient self-cleaning energy-storage illuminating light reflection film sequentially comprises a self-cleaning cladding layer, a light reflection film layer, an air layer, an energy-storage illuminating light reflection film layer and an adhesive layer from top to bottom. According to the efficient self-cleaning energy-storage illuminating light reflection film, cleaning can be kept for a long time through the self-cleaning effect of the self-cleaning cladding layer outdoors; under the illumination condition, and the warning and guiding aims are achieved through the efficient light reflection effect of the light reflection layer; under the dark condition, the warning and guiding aims can be also achieved through the illuminating effect of the energy-storage illuminating layer. The light reflection film has the advantages of being good in self cleaning, efficient in light refection, high in illuminating brightness, long in illuminating time and service life, wide in application range and the like.

The invention discloses an energy-saving high-pressure cleaning machine, and belongs to the technical field of cleaning equipment. The high-pressure cleaning machine comprises a casing, wherein an air storage cavity and a water storage cavity are vertically formed in the casing, a motor pump is arranged in the water storage cavity and connected with a sprayer through a high-pressure water pipe, the sprayer comprise an upper sprayer body and a lower sprayer body which are fixedly mounted together, the upper sprayer body and the lower sprayer body jointly form a blowing cavity, a brush plate is fixedly mounted on the lower sprayer body and provided with a plurality of bristles, a plurality of water outlet holes are formed in the brush plate and located among the bristles, the lower sprayer body is connected with a water inlet pipe, an air inlet channel communicated with the blowing cavity is formed in the upper sprayer body and communicated with the air storage cavity through an air pipe, and a pressurizer which can increase the pressure of airflow entering the blowing cavity is arranged between the air inlet channel and the end part of the water inlet pipe and located in the blowing cavity. The cleaning machine has the advantages of energy saving, water saving, good washing effect, long service life and the like, and can be widely applied to vehicle cleaning.

The invention relates to the technical field of keyboards, in particular to a durable keyboard with a self-cleaning function, which comprises a keyboard body, a plurality of keycaps and key positionsare arranged on the keyboard body, shells are arranged in the key positions, openings are formed in the shells, point contact strips protrude from the keycaps, through holes are formed in the shells,and reset springs sleeve the point contact strips; a plurality of elastic air bags are further arranged in the shell, the shell is provided with a plurality of air pipes, the other ends of the air pipes are communicated with exhaust holes, and the key cap is provided with a skirt edge. The key cap is provided with a groove, and the groove is filled with spraying paint. The method comprises the following steps of: 1, forming opposite flushing air flows in different directions so as to better blow away dust around a key position; 2, two or more point contact strips are arranged, so that the service life is prolonged; and 3, a plurality of exhaust holes are formed, so that the self-cleaning effect of the keyboard is further improved. And 4, a proper amount of flexible capillary rods are arranged in the air pipe, so that dust can be effectively prevented from entering the elastic air bag through the air pipe from an external space or blocking the air pipe after long-term use.

The invention discloses an anti-electromagnetic interference socket device assembly. An electromagnetic shielding cover body covers the socket device assembly; the electromagnetic shielding cover body which is of a sandwich structure specifically comprises two layers of permalloy plates and a layer of foamed aluminum-copper-nickel alloy sandwiched between the two layers of the permalloy plates and can realize a good shielding effect for electromagnetic waves at a low frequency band and a high frequency band; meanwhile, pollution from electromagnetic radiation of the socket device assembly to the environment is prevented, and interference from outer electromagnetic waves to the socket device assembly is also reduced; furthermore, a nanosheet super-hydrophobic structure is formed after the surface of the permalloy plate of the cover body is subjected to a hydrochloric acid treatment, so that a self-cleaning, anti-fogging, anti-icing and erosion-resisting protective effect is played, and the service life of the socket device assembly can be prolonged.

The invention discloses a double-side self-cleaning woodworking cold press. The double-side self-cleaning woodworking cold press comprises a machine body and a working cavity formed in the machine body, a plurality of hydraulic cylinders are fixedly connected to the top of the working cavity, a press plate is fixedly connected to the hydraulic cylinders, sliding blocks are fixedly connected to thetwo sides of the pressing plate, the sliding blocks and the pressing plate form a whole together and are connected to the inner wall of the working cavity, a fixing table is fixedly connected to thebottom of the working cavity, two moving cavities are formed in the parts, located on the two sides of the working cavity, of the machine body respectively, permanent magnet blocks are connected in the moving cavities in a sealed sliding mode, and first conducting boards are fixedly connected to the bottoms of the permanent magnet blocks. The double-side self-cleaning woodworking cold press has the advantages that dust removing work is carried out on two boards through the feature that the two conducting boards are breakthrough under the mutual approaching action to release high-speed air flow, self position adjustment is achieved by detecting the current generated in the charging process of a parallel plate capacitor, a photosensitive layer and a detection light, and alignment and use arefacilitated.

The invention belongs to the technical field of coatings and particularly relates to a self-cleaning coating for a metal substrate and a preparation method and use method thereof. The self-cleaning coating for a metal substrate comprises an intermediate layer and a self-cleaning layer. The intermediate layer is sprayed on a metal substrate and the self-cleaning layer is sprayed on the intermediatelayer. The intermediate layer comprises polyurethane, nano-silica, butyl acetate and nano-talcum powder. The self-cleaning layer comprises nanometer titanium dioxide, ethanol, propanol and polyvinylalcohol. The self-cleaning coating for a metal substrate can utilize a photocatalytic reaction of titanium dioxide in the self-cleaning layer to realize a self-cleaning function. The polyurethane in the intermediate layer has corrosion resistance and prevents the self-cleaning layer from directly contacting with the metal substrate to inhibit metal substrate corrosion or decomposition.

The invention provides energy-saving and durable self-cleaning variable-color outer wall water paint and a preparation method thereof. The outer wall water paint is prepared from a modified acrylic emulsion, pigment filler, functional filler, variable-color pigment, an assistant and water, wherein the modified acrylic emulsion is prepared by polymerizing 8-14 parts of fluorinated acrylate monomer, 10-20 parts of alkenyl silane and 75-85 parts of acrylate monomer, all by mass; the pigment filler is a mixture of titanium dioxide, talc powder and sodium thiosulfate; the functional filler is rice husk ash; the variable-color pigment is sheet mica coated with a titanium dioxide nanofilm. The outer wall water paint has the advantages of strong hardness, adhesion and covering power and perfect water resistance and acid-base resistance and can be protected from color change and falling for a long time; moreover, the color of the film changes according to different viewing angles, and the film is durable and has a good aesthetic effect. Meanwhile, the coating also has relatively good stain resistance and heat insulating property and can realize self-cleaning and energy-saving effects.

An embodiment of the invention provides a sealant and a preparation method thereof as well as a liquid crystal display panel and relates to the technical field of display. The self-cleaning effect ofthe sealant can be realized, so that the probability that foreign ions enter liquid crystals can be reduced. The sealant comprises a sealant matrix and a component for adsorbing foreign ions, whereinthe component for adsorbing foreign ions is mixed in the sealant matrix.

The invention relates to a cleaning-type antiskid bearing, which belongs to the technical field of bearing. The bearing comprises an outer ring, a rolling member, an inner ring, a dust-resistant cover and a conical ring; a ring inner groove is arranged at the central part of the outer wall of the outer ring, the inner groove and the outer ring are coaxially arranged; side discharge grooves are arranged at two sides of the outer wall of the outer ring in the interval and parallel mode, the inner groove and the side discharge grooves are conducted; and an intersection angle of the inner groove and the side discharge groove is 45 DEG. According to the bearing, the inner groove and the side discharge groove are arranged on the outer wall, friction coefficient of the outer wall of a gear is increased, when the granular impurity is introduced between the gear and a belt, the granular impurity is easily accumulated in the inner groove, with guide of the belt, through outer discharge of the side discharge groove, self-cleaning effect is achieved.

The invention discloses an intelligent industrial fan adopting pipeline connection. The intelligent industrial fan comprises a mounting pipe and pipelines connected to the two sides of the mounting pipe, a filter screen is fixed to the inner wall of the mounting pipe, two bearing plates are fixed to the position, close to the filter screen, of the inner wall of the mounting pipe, and a rotating shaft is jointly and rotationally mounted on the axes of the two bearing plates; a through hole allowing the rotating shaft to penetrate through is formed in the outer wall of the filter screen, fan blades are fixed to the end, penetrating through the filter screen, of the rotating shaft, a circular truncated cone block is fixed to the portion, located between the two bearing plates, of the outer wall of the rotating shaft, a driving mechanism used for driving the circular truncated cone block to rotate is further installed on the inner wall of the mounting pipe, and the driving mechanism comprises a motor; and the motor is fixed on the inner wall of the mounting pipe. Through cooperation of the structures, the effect that the rotating speed of the fan blades is increased while the smoke concentration is increased is achieved, so that the smoke emission speed is increased, and then the effect of self-adaptive adjustment of the rotating speed of the fan blades is achieved.

The invention belongs to the technical field of coatings, and particularly relates to a self-cleaning type coating for a wood base, and a preparation method and application method of the coating. Theself-cleaning coating for the wood base comprises a middle layer and a self-cleaning layer, wherein the middle layer is sprayed on the wood base, and the self-cleaning layer is sprayed on the middle layer; the middle layer comprises polyurethane, nano silicon dioxide, acrylic acid, ethanol, acrylic ester and nano magnesium hydroxide; and the self-cleaning layer comprises nano titanium dioxide, tetrabutyl titanate, ethanol, water and polyvinyl alcohol. The self-cleaning type coating for the wood base provided by the invention can utilize the photocatalytic reaction of the titanium dioxide in the self-cleaning layer to realized the self-cleaning function; and meanwhile, the polyurethane contained in the middle layer has a corrosion-resistant effect, so that the self-cleaning layer can be prevented from being in direct contact with the wood base for corroding or decomposing the wood base.

The invention discloses a waterproof self-cleaning fiber coating and a preparation method thereof, and relates to the technical field of new materials. The preparation method comprises the following steps: co-spinning oleic acid coated ferroferric oxide and polyvinyl alcohol to prepare modified polyvinyl alcohol fibers; mixing starch and ferroferric oxide to prepare starch-based magnetic particles; adsorbing metal ions via the starch-based magnetic particles, and inserting the starch-based magnetic particles into a niobate lamellar structure to prepare modified niobate; and finally, crushing the modified polyvinyl alcohol fibers, mixing the crushed modified polyvinyl alcohol fibers with the modified niobate, forming crosslinking under the action of polyphosphoric acid and maleic anhydride, and conducting coating to form a film, thereby acquiring the waterproof self-cleaning fiber coating. The waterproof self-cleaning fiber coating prepared by the preparation method disclosed by the invention has excellent waterproofness and good self-cleaning performance on inorganic and organic pollutants.

The invention discloses a high-strength medical plastic bag and a preparation process thereof, and relates to plastic bag manufacturing. The high-strength medical plastic bag comprises the following raw materials in parts by weight: 50-65 parts of plant cellulose, 8-15 parts of linear low-density polyethylene, 1-5 parts of polymethyl phenolic aldehyde, 10-20 parts of plant starch, 15-20 parts of reed biochar, 4-12 parts of calcium carbonate whiskers, 1-2 parts of a silane coupling agent, 10-14 parts of a stabilizer, 5-10 parts of a plasticizer, 4-10 parts of nano montmorillonite, 3-6 parts of an impact modifier and 1-2 parts of a water repellent agent. According to the scheme, the photocatalyst bactericide is added into the main ingredients of the medical plastic bag and has an excellent photochemical effect, small organic molecules can be decomposed into carbon dioxide and water, on one hand, the self-cleaning effect can be achieved, on the other hand, redundant toxic and organic gas can be adsorbed, and harmful microorganisms such as fungi and the like can be killed, so that the diffusion concentration of the garbage contained in the bag to the surrounding air in unit time can be reduced, and the effects of inhibiting and killing bacteria are achieved.

The invention relates to a preparation method for hydrophobic coating and a product and an application thereof. The preparation method comprises the following steps: accurately weighing high-purity zinc powder and deionized water, adding the zinc powder to the deionized water, stirring and ageing, after drying, placing in a porcelain boat and placing in a high-temperature furnace, heating for a period of time, to obtain tetrapod-like zinc oxide; and adding the tetrapod-like zinc oxide to organic silicon resin, and adding an assistant, uniformly stirring to obtain the hydrophobic coating. The hydrophobic coating prepared by using the method is capable of, through the tetrapod-like zinc oxide, providing a micro-nano microscopic structure, and through matching low surface energy of the organic silicon resin, enabling a coating layer to achieve a better hydrophobic state, and achieving waterproof self-cleaning functions, and has great application prospect.

The invention discloses an anti-electromagnetic interference type vacuum circuit breaker. A shield with an electromagnetic shielding function covers the vacuum circuit breaker body and is of a sandwich structure, and particularly, the sandwich structure is formed by sandwiching a foamed aluminum-copper-nickel alloy layer between two permalloy layers. The anti-electromagnetic interference type vacuum circuit breaker has the advantages that low-frequency-band and high-frequency-band electromagnetic waves can be well shielded, environmental pollution caused by electromagnetic radiation of the vacuum circuit breaker is prevented, and interference of external electromagnetic waves on the vacuum circuit breaker is weakened; further, the permalloy surface of the shield is subjected to hydrochloric acid treatment to form a nanosheet super-hydrophobic structure, so that self-cleaning, antifog, anti-freezing and anticorrosive protection effects are achieved, and service life of the vacuum circuit breaker can be prolonged.

The invention discloses a building external wall with the good anti-electromagnetic radiation performance. An electromagnetic shielding material is pasted on the outer surface of the building external wall. The electromagnetic shielding material is of a sandwich structure, and specifically formed by sandwiching a layer of foamed aluminum-copper-nickel alloy between two layers of permalloy plates. The electromagnetic shielding material has good shielding effects on low-frequency-band and high-frequency-band electromagnetic waves, avoids indoor electromagnetic information leakage and reduces interference of outside electromagnetic waves on the indoor environment. Further, the surfaces of the permalloy plates of the material are subjected to hydrochloric acid treatment to form nanosheet super-hydrophobic structures, so that the self-cleaning, anti-foggy, anti-frozen and anti-corrosive protective effects are achieved, and the service life of the building external wall can be prolonged.

The invention discloses a switchable cleaning anode-cathode device, which comprises an electrode retaining collar, wherein the electrode retaining collar is arranged in a water body; the electrode retaining collar consists of an inner ring of the electrode retaining collar and an outer ring of the electrode retaining collar to be mutually a cathode and an anode; the inner ring of the electrode retaining collar and the outer ring of the electrode retaining collar are electrically connected with a polarity switching circuit module respectively; the polarity switching circuit module controls theswitching of the anodic polarity and the cathodic polarity of the inner ring of the electrode retaining collar and the outer ring of the electrode retaining collar; the center of the electrode retaining collar is provided with an agitation device used for agitating the water body. The switchable cleaning anode-cathode device is simple in structure and ingenious in design and can be used for easilyrealizing a self-cleaning effect on the electrode retaining collar.

The invention discloses an intelligent valve and a using method thereof, and belongs to the field of intelligent valves. The intelligent valve comprises an intelligent valve body and an intelligent valve controller fixedly installed at the upper end of the intelligent valve body, and a temperature control type flexible sealing piece matched with the intelligent valve body is arranged between the intelligent valve body and an intelligent valve deck; a self-cleaning fish scale set is connected with the lower end of the temperature control type flexible sealing piece, the self-cleaning fish scale set can be washed through the matching effect of the temperature control type flexible sealing piece and the self-cleaning fish scale set by means of fluid pressure, residues of impurities on the wall face of the self-cleaning fish scale set are reduced, damage of the impurities to the temperature control type flexible sealing piece is reduced, the sealing effect of the intelligent valve body is improved, and the service life of the intelligent valve body is prolonged; and the self-cleaning effect is achieved through flowing resistance, the control difficulty of an intelligent valve controller is reduced, the manufacturing cost of the intelligent valve body is reduced, and the economic benefits of the intelligent valve body are improved.

The invention belongs to the technical field of preparation of electrochemical sensors, and specifically discloses an electrochemical sensor with self-cleaning ability. The electrochemical sensor comprises an electrode core and a novel composite material based on MTOF (M refers to a doped metal element), and the composite material is attached to the surface of the electrode core. The preparation method of the sensor is simple, time-saving, low in cost and environmentally friendly. In particular, the residue of polymers and detected substance contained in the sensor and attached to the surfaceof the electrode core after detection can be oxidized under ultraviolet light and visible light conditions, thereby realizing the regeneration and self-cleaning effects of electrochemical sensor undervisible light. An electrochemical sensing platform regenerated under visible light not only reduces the tedious process of electrode polishing and modification, but also saves the cost of modifying materials, and the descaling regeneration of the electrode prolongs the service life of the electrode. The sensor is applied to the simultaneous detection of environmental pollutants, that is, hydroquinone and catechol, the operation is simple and convenient, the selectivity is good, the sensitivity is high, and the detection limit is low.

The invention provides an anti-sliding self-locking universal bearing and belongs to the technical field of bearings. The anti-sliding self-locking universal bearing comprises an outer ring, a rolling piece, an inner ring, dustproof covers, conical rings and a holder. A ring of inner groove is formed in the middle of the outer wall of the outer ring and coaxial with the outer ring. Side discharge grooves which are arranged in parallel in a spaced manner are formed in the two sides of the outer wall of the outer ring. The inner groove communicates with the side discharge grooves. The angle of intersection of the inner groove and each side discharge groove is 45 degrees. According to the anti-sliding self-locking universal bearing, the inner groove and the side discharge grooves are formed in the outer wall of the bearing, and the friction coefficient of the outer wall of a gear is increased; and besides when particle impurities sneak into the portion between the gear and a belt, the particle impurities gather in the inner groove easily and are discharged outwards through the side discharge grooves under the guidance of the belt, and the self-cleaning effect is achieved.

The invention discloses a self-cleaning type fused quartz ceramic roller sander comprising a supporting plate; the upper end of the supporting plate is provided with a working table, and the working table is externally provided with a left soundproof dust cover and a right soundproof dust cover; a top plate is arranged above the supporting plate, and the bottom surface of the top plate is slidablyconnected with a fixing plate through a sliding block; the bottom surface of the fixing plate is provided with a second hydraulic cylinder, and a second piston rod is arranged in the second hydrauliccylinder; the lower end of the second piston rod is provided with a mounting plate, and the bottom surface of the mounting plate is provided with a grinding motor; the lower end of the grinding motoris fixedly connected with a grinding disk, and one side of the fixing plate is provided with a first hydraulic cylinder; and a first piston rod is arranged in the first hydraulic cylinder, and a suction fan and a scrap collecting box are installed on the outer side wall of a support column. The sander is simple in structure, and convenient in operation, and facilitates grinding of a ceramic roller; the grinding effect is good, and waste scraps generated in the grinding process can be removed through the suction fan; and the self-cleaning effect is achieved.

The invention discloses a preparation method of an oilfield oily sewage treatment filter material modifier. The preparation method comprises three steps of preparing a cellulose nanocrystalline aqueous solution, preparing a modified nano silica sol aqueous solution and preparing the filter material modifier. The surface of the modified filter material produced by the method has an underwater self-cleaning effect, the oil pollution resistance is high, and the maintenance frequency of the filter can be reduced. The formed under-oil super-hydrophilic coating is stable in physicochemical propertyfor a long time, can be effectively applied to up-to-standard treatment of oilfield reinjection sewage, reduces the treatment cost, and has good economic benefits.

The invention discloses a filter screen anti-blocking device for dust collection equipment for textile. The filter screen anti-blocking device comprises a dust collecting box, a feeding port is formedin one side of the dust collecting box, a filter screen is arranged on the other side of the dust collecting box, an air chamber is fixedly connected to the side, close to the filter screen, of the dust collecting box, a baffle is connected into the air chamber in a sealed mode, and an impeller is arranged in the air chamber; and a rotation center of the impeller is fixedly connected with a rotating shaft, the rotating shaft penetrates through the baffle and is fixedly connected with a motor, and the motor is connected with a conductive structure. According to the invention, when the mesh ofthe filter screen is blocked, thermoelectricity is formed through the temperature difference generated by the residual heat of the motor, so that an electric plate close to one side of the filter screen is electrified, and dust in the filter screen is sucked under the action of electrostatic adsorption; and on the other hand, under the condition that the internal energy of the motor is larger, thevoltage at both ends of the motor is reduced through a thermistor, and a current is applied to a conductor ring, so that the temperature of the motor is lowered by the principle of temperature difference refrigeration, and the motor is prevented from being burnt out.