525results about How to "Easy to prevent dust" patented technology

The invention discloses a rotary annular-seam spray nozzle comprising a core seat, a rotary core and a rotary annular-seam spray hole, wherein a core cavity is arranged in the core seat, an inlet and an outlet which are communicated with the core cavity are arranged on the core seat, a core seat inlet is communicated with a pressure flow source, the rotary core can be sleeved into the core cavity in positioning and rotating modes and is concentric with the core cavity, a rotation-promoting flow path is arranged on the rotary core or / and the wall of the core cavity in order to mutually rotate the rotary core and the core cavity by using flow power, one end of the rotary core is penetrated into the core seat outlet, and the penetrating end forms the rotary annular-seam spray hole with the inner wall of the core seat outlet. The cross section of the spray hole of the rotary annular-seam spray nozzle is an annular seam, the annular seam and a diameter can be set to respectively and conveniently control the fineness and the flow of pressure spray and make liquid drop sizes more evenly and finely distributed. The rotary annular-seam spray nozzle has a self-cleaning function, is not easy to block and is in a self-closing dust-resisting type; the rotary annular-seam spray nozzle is arranged on a spray head body or the core seat of the rotary annular-seam spray nozzle is connected with the spray head body, the spray head body is communicated with the pressure flow source, and therefore, the spray device with the rotary annular-seam spray nozzle can be formed.

The invention provides a residual coal full-mechanized repeated mining method of a near-distance inflammable seam gob, which aims to solve the problem of resource loss, natural inflammation and gas discharge difficulty in mining a near-distance underlying seam above which a tool post gob covers. The method comprises the following steps that: upper coal covering pillars are put when a lower seam is mined; a staggered roadway arrangement method is adopted, i.e. an air inlet transportation roadway is arranged in an underlying seam, and tunneling along with the bottom is performed; an air return transportation roadway is arranged in an upper covering seam, and tunneling along with the top is performed; and a process procedure combining a mode that one upper coal covering pillar is put while mining for twice and a mode that one upper coal covering pillar is put while mining for one time is adopted in a working plane, i.e. when the whole seam is not mined, one upper coal covering pillar is put while mining for twice, and when the whole seam is mined in different layers, one upper coal covering pillar is put while mining for one time. With the adoption of the method, the recycling of residual coal is realized while new seams are mined, so that not only is the non-renewable coal resource saved, but also the service life of a mining well is prolonged, and the resource recycling efficiency is significantly improved.

The invention discloses a gas flow rate survey meter based on the tunable diode laser absorption spectroscopy technology, comprising a red-light light source, a laser, a signal generator, a laser launcher, a laser receiving device, an optical-fiber interferometer, a data acquisition card, a detector, a locking amplifier and a data processing and displaying module. The gas flow rate survey meter works in an all optical fiber mode, which facilitates the remotely transmission of a signal. Compared with the prior art, the gas flow rate survey meter based on the optical method disclosed by the invention has the advantages of non-invasive monitoring object, high spatial resolution, high dynamic response, high measurement precision and big measurement range. The gas flow rate survey meter is easy to install, prevents dust, prevents from splashing, corroding and shocking and is suitable for monitoring industrial emission with high temperature, high dust content and high toxicity and corrosivity. The gas flow rate survey meter also can be used for measuring high-speed airflow of which the flow velocity reaches thousands of meters / second, and can be used for detecting airplane engines.

The invention provides a high-speed three-dimensional laser imaging radar system of a lunar rover and an imaging method thereof; wherein, the system comprises a dot structure ray laser range finder, a scanning dual-driving brushless servo motor system and a laser reflecting prism; a vertical motor and a horizontal motor with the installation position in 90 degrees are provided; the axis line on which the two motor output shafts are arranged is crossed with the laser ray at the reflecting inclined surface center of the prism; the vertical motor controls the prism to continuously spin on the plane vertical to the output shaft of the prism along the axis line direction; the other horizontal motor adopts a stepping type to control the plane to carry out pitching rotation within a certain range on the vertical direction; furthermore, a photoelectric encoder, an encoding device and a high-speed collecting interface matched with the laser range finder are provided; the obtained distance and the sampling data of the rolling and pitching angle of the prism are synchronous data, the structure is compact, the weight is light, the volume is small, the power dissipation is low, the scanning speed is fast, the laser reflecting prism rotates at high speed and is beneficial to dust prevention, and the three-dimensional data has high precision and good synchronization effect.

It is a gear-type stepless regulating structure of seat angle. The external truss plate of its gear transmission mechanism is equipped in its inner truss plate with an eccentricity. The external cam of its clearance eliminating mechanism is located between the center boss of the inner truss plate and the inner hole of the external truss plate. The inner cam is set between the inner hole of the external cam and the center boss of the inner truss plate. The spring sets inside to form an eccentric cam mechanism. The center axis of the driving mechanism is equipped in the hole of the center boss of the inner truss plate. The driving block locates between the inner and external cams. When the spring in free state, the inner and external cams are in wedge ramp state to eliminate the seat clearance. The driving block overcomes the spring force under the moment loading to relieve the wedge ramp of the clearance eliminating mechanism, which drives the gear transmission mechanism transmitting and rotating to adjust the seat angle. The invention has compact structure, small clearance, high intensity and strong generality, which can realize the manual and electric adjustment and stepless regulation of the seat backrest.

The invention relates to the field of a potting adhesive and particularly relates to a low-viscosity heat-conduction electronic potting adhesive applicable to each electronic element and a preparation method thereof. The heat-conduction electronic potting adhesive is formed by a component A and a component B in a weight ratio from 100: 90 to 100: 110; the component A comprises the following raw materials in weight percentage of 39.20-79.60% of heat-conduction inflaming retarding powder, 0.80-2.00% of color matching agent, 0.40-1.00% of silane coupling agent, 16.20-43.80% of liquid silicon oil and 3.00-14.50% of silane cross-linking agent; and the component B comprises the following raw materials in weight percentage of 39.20-79.60% of heat-conduction inflaming retarding powder, 18.00-57.80% of liquid silicon oil, 0.20-1.00% of silane coupling agent, 1.00-1.96% of color matching agent and 0.04-1.00% of catalyst. The low-viscosity heat-conduction electronic potting adhesive has lower viscosity, excellent mobility, good heat-conduction performance and high inflaming retarding grade; the potting requirement of a seam less than 0.02 mm can be met and the construction is convenient; and after the heat-conduction electronic potting adhesive is cured, the strength is good, and the dustproof, moisture-proof and vibration-proof performances are good, the electronic element can be effectively protected and the service life of the electronic element is prolonged.

The invention relates to a Micro USB (universal serial bus) receptacle, which comprises a PCB (printed circuit board) and an outer casing. The receptacle is characterized in that a convex block extends outwards from the side edge of the PCB, the surface of the convex block is provided with a copper coil which is connected with a PCB circuit, the interior of the outer casing is provided with a through hole, the convex block is inserted into the through hole of the outer casing to form a connecting core of the USB receptacle, and the bottom of the convex block is provided with a sealing piece which is used for sealing the opening of the through hole. The micro USB receptacle has the beneficial effects that 1. the PCB is provided with a matrix, so the material is saved, the production process is simplified, and the production cost is reduced; 2. the outer casing adopts a plastic outer casing, so the interference effect on antennas by hardware is improved, and the manufacturing cost is reduced; 3. a sealant is adopted for sealing the opening of the outer casing, so the waterproof and dustproof functions are favorably realized; 4. as the outer casing is made of plastic material, the matching degree is higher when the outer casing is assembled on an object or is arranged in a mounting hole, the gap is smaller, and the dustproof purpose is favorably realized.

The invention falls into the technical field of polymer composite material, and discloses PA / ABS alloy material and a preparation method thereof. The PA / ABS alloy material comprises (by weight parts) PA 30-80, ABS 10-50, an antioxidant 0.1-0.5, a compatilizer 3-10, a lubricant 0.1-0.5, an antistatic agent 2-10 and a flame retardant 10-20. The preparation method includes putting all above raw materials in a high-speed mixer, mixing for 2-5 minutes, and extruding and granulating by a screw extruder to obtain the PA / ABS alloy material. The inventive PA / ABS alloy material has stable size, high strength, good appearance, high fluidity and resistance to chemicals, and possesses antistatic and flame retardant effects at the same time, and therefore, can be widely applied in fields of electronics, automobile, etc.; owing to the antistatic and flame retardant functions of the PA / ABS alloy material, the PA / ABS alloy material can play a role of electrostatic prevention, dust prevention and flame retardance during application process.

The invention discloses a range hood capable of detecting the oil fume concentration. The range hood comprises a shell. A fan and a main control unit capable of controlling the rotating speed of the fan are arranged in the shell. The fan is mounted in a fan shell, and the fan shell is arranged in the shell and provided with an air inlet and an air outlet. The main control unit is further connected with a photoelectric oil fume sensor capable of detecting the oil fume concentration. The photoelectric oil fume sensor comprises a detecting light emitting device and a detecting light receiving device and is characterized in that the detecting light emitting device and the detecting light receiving device have an included angle after being mounted, and an intersection point or an intersection area of the straight line where the emitting direction of the detecting light emitting device is located and the straight line where the receiving direction of the detecting light receiving device is located is located 1-5 cm below the air inlet of the fan shell; and the detecting light emitting device and the detecting light receiving device further comprise protection structures, or, the detecting light emitting device or the detecting light receiving device further comprises a protection structure. The range hood is high in detection sensitivity, and the oil stain resistant effect of the oil fume sensor is good.

The invention relates to a yarn with a conductive function and good breathability. The yarn comprises a yarn core and a coating layer, wherein the yarn core is a conductive fiber; the conductive fiber is a surface chemical copper plated polyester fiber; the coating layer comprises a first fiber; and the yarn core is wound with the first fiber in a first direction. The yarn has good dustproof and antistatic effects; a yarn material, the fineness, the twist degree, the reasonable textile weave and the density of the first fiber are designed appropriately by a well-known method, so that a good hand feel, the breathability and the comfortability can be endowed; and a visual effect can be improved.

The invention discloses a dust suppressing and removing device for a fully mechanized coal mining face. The technical thought of performing dust prevention and control from the source is adopted; a group of air curtain nozzles for jetting air current is arranged behind two cutting parts of a coal mining machine and close to a control part of the coal mining machine respectively, thereby forming air walls wrapping fog fields formed by spray dedusting equipment inside and outside the coal mining machine respectively on two drums of the coal mining machine; a bracket spray dedusting device and a bracket dust absorbing and purifying device are arranged on each bracket respectively in order to effectively precipitate or absorb a large amount of dust falling from both sides and the front of the brackets and dust overflowing from a control-dedusting system of the coal mining machine in a precipitating or absorbing bracket-moving process. Compared with the prior art, the dust suppressing and removing device for the fully mechanized coal mining face disclosed by the invention has the advantages of good dust prevention and removal effects; the device is easy and convenient to operate, is small in investment, and has good market application prospect and popularization value.

The invention discloses a high-power LED bulb with electric shock preventing performance, high safety and long service life. The high-power LED bulb comprises a bulb cap (1), an insulating casing (2), an insulating light-transmitting front bulb shade (3), a light source plate (4) integrated with an LED chip, a radiator (5), a power supply drive component (6) and a thermo-sensitive switch (8), wherein the thermo-sensitive switch (8) is used for cutting off a power supply when the bulb is under high temperature; the front end of the insulating casing (2) is fixedly connected with the insulating light-transmitting front bulb shade (3), so as to form an accommodating cavity; all the light source plate (4), the radiator (5), the power supply drive component (6) and the thermo-sensitive switch (8) are arranged in the accommodating cavity; the radiator (5) comprises a baseplate (50); the bottom surface of the baseplate (50) is a plane surface part tightly clung to the light source plate (4); a heat radiation pillar (51) is arranged on the top surface of the baseplate (50); a lug boss (52) or sunken part which is used for enlarging the radiation area is arranged on the top surface of the baseplate (50); and a plurality of heat radiation grooves (21) communicated with the inner cavity of the insulating casing (2) are formed on the side wall of the insulating casing (2). The high-power LED bulb can be extensively applied to the field of LED illumination.

The invention discloses a graph paper display device comprising a graph paper frame. A groove is formed in the graph paper frame; lamp holders are arranged on the inner walls of two sides of the groove; a lamp tube is mounted on each lamp holder; a base plate is arranged on the bottom of the groove; a piece of graph paper is arranged on the base plate; the base plate is rotationally connected with a paper pressing plate; one side that the paper pressing plate and the base plate get close to each other and are pressed against each other is provided with a magnet; a glass slide seat is arranged on the top of the edge of the graph paper frame; glass is slideably connected to the glass slide seat; one side that the glass slide seat is close to the graph paper is provided with a second groove; one side that the second groove is far away from a second groove mouth is provided with an accommodating cavity; the inner wall of the accommodating cavity is connected with one end of a spring; the other end of the spring is connected with a slide block disposed in the accommodating cavity. By the use of the graph paper display device, the graph paper can be stored, so the edges of the graph paper cannot be folded and wrinkled; the glass slide seat and the glass can slide conveniently; buffering effect can be achieved during the process of slide, so pause during the slide can be avoided; and meanwhile, the glass can prevent dust and facilitates graph paper preservation.

The invention discloses an anti-charged dust device used on the surface of an optical system or a solar cell, comprising a substrate, as well as a tin indium oxide layer, a titanium dioxide nanoparticle array layer and a fluorine-containing polymer thin film layer, which are sequentially formed on the substrate, and the substrate is glass used on the surface of the optical system or a silicon chip used on the surface of the solar cell. Under continuous ultraviolet radiation, the surface of the device is continuously positively charged, thereby enabling dust adhered on the surface to finally have the same charge with that on the surface of the device regardless of the original charge of the dust, and further enabling dust particles to be separated from the surface under the action of electrostatic repulsion. In addition, a hole generated by the titanium dioxide layer under the ultraviolet radiation has strong oxidizing property, thereby being capable of decomposing organic matters adhered on the surface of an optical device and playing a bactericidal role. The device can achieve good dust prevention and dust removal effects, and effectively prevent light transmittance on the surface of the optical system or the solar cell from being reduced due to hindrance of the dust.

The invention relates to a dredging operation simulation device, which comprises a dredging pool, guide rails and a machine frame, wherein the guide rails are arranged at the two sides of the top of the dredging pool; the machine frame transversely spans above the guide rails positioned at the two sides and can move along the guide rails; a vertical main shaft, a rotating mechanism and an ascending and descending mechanism are arranged on the machine frame; the rotating mechanism can drive the main shaft to rotate; the rotating speed of the rotating mechanism is adjustable; the ascending and descending mechanism can drive the main shaft to ascend and descend; the bottom of the main shaft is connected with a dredging reamer through an angle regulating mechanism; the angle regulating mechanism can drive the dredging reamer to swing around the main shaft, and the swinging speed is adjustable during swinging. The device can be used for simulating the stepping, rotation and ascending and descending during the operation of a dredging boat; the simulation can be realized on different operation modes in practical construction; the dredging operation simulation device is suitable for the dredging of various different soil properties.

Disclosed is preparation technique for a decoration piece in a die, comprising the following steps: firstly, a vignette is printed on the surface of a transparent substrate material with ink; secondly, the printed film is treated under high pressure to be modeled into the needed shape and the redundant margin part is cut off. The high pressure treatment is done with a high-pressure molding machine and the technique parameters are that the upper and the lower heating temperature are between 280 DEG C and 380 DEG C; the temperature of the hot air is between 250 DEG C and 350 DEG C; the preheating temperature of the die is between 60 DEG C and 120 DEG C; the die closing time is from 6 to 20 seconds; the molding time is from 7 to 20 seconds; the exhausting time is from 3 to 8 seconds; the die closing speed is from 50 to 100 percent and the die opening speed is from 50 to 100 percent; thirdly, the printed film in a certain shape is put into the cavity of the die and thermoplastic resin is injected to make the film into a product; the parameters of the molding technique are subject to the thermoplastic resin. The invention is the technique of veneering at the same time with injection molding; the product and the decorative printed material are compounded into a whole and solid molded product can be printed with a decorative vignette, making the product having both functional effect and decorative effect.

The invention relates to automatic measuring technical field and is especially an automatic distributing and double-balance weighing device, mainly composing a system for using together with dye tank group storing various dyes, reciprocating dye weighing vehicle, computer monitoring circuit, etc. There is a large-range ordinary electronic balance and a small-range high-accuracy electronic balance arranged in the device, and the two electronic balances are installed on the same weighing vehicle body. A power lift arm is installed in the middle of the vehicle body, i.e. between the two electronic balances and can be set with a big dye bucket and a mall dye bucket. For preventing dust pollution, the system installs a vacuum cleaner on the vehicle body and connects the vacuum cleaner through pipeline to a dust pumping casing. A gas path switching mechanism equivalent to two three-way valves opens or closes the gas path of corresponding annular dust collector according to operation requirement. The main character of the system is being able to implement large-range and high-accuracy distributing.

The invention belongs to an illuminance detection device for photoelectric components and in particular discloses an intermittent illuminance detection device. The intermittent illuminance detection device comprises a pedestal, wherein a photoelectric component opening / closing device for placing a photoelectric component is arranged at the bottom of the pedestal; and a driver for driving the photoelectric component opening / closing device to rotate and driving the photoelectric component opening / closing device to extend out of the bottom surface of the pedestal is arranged on the pedestal. Theintermittent illuminance detection device has the advantages that: when the photoelectric component is detected, the illuminated surface of the photoelectric component is not sheltered completely, and when the photoelectric component is not detected, the illuminated surface of the photoelectric component is sheltered completely, so that the accuracy of the detection result is effectively improved; and at the same time, the intermittent illuminance detection device has certain dustproof and rainproof functions, so that overlong illumination duration of the photoelectric component is avoided and the service life of the photoelectric component is guaranteed; in addition, the intermittent illuminance detection device has a better self-checking function, so when the external illuminance does not need to be detected, the illuminated component can be placed in a sealed darkroom, and the normal using performance of the photoelectric component is guaranteed by adopting a standard light source to perform self-checking and correction.

The invention discloses a protection device, and an electronic device comprising the same. The protection device is used for protecting a camera, the protection device comprises a first housing and ashielding member, the camera is arranged in the first housing, the shielding member is located in the first housing, the protection device further comprises a dialing member, the dialing member is located at the outside the first housing and slides on the first housing, and the shielding member and the dialing member are physically isolated through the first housing; and through the magnetic forcebetween the dialing member and the shielding member, the shielding member slides in the first housing and is used for exposing or shielding the camera. The electronic device comprises a camera and the protection device. According to the protection device, the shielding of the camera is implemented by driving the shielding member to slide through the magnetic force of a second magnet and a first magnet, the structural form is simple, the space occupation is small, the use is convenient, the dustproof and waterproof effects are good, and the service life is long.

The invention relates to a method for producing an automotive sound-absorption and heat-insulation integrated carpet and belongs to the technical field of automotive interior decorations. In the method, an environmentally-friendly 3.5 millimeter (including 0.8 millimeters of a toughening layer, 2.5 millimeters of a foaming layer and 0.2 millimeter of a bottom film protective layer) PVC foamed leather is mainly used and subjected to heating, baking, vacuum forming, cooling forming, 8 millimeter cotton-based sound-absorption and heat-insulation carpet compression and lamination, shearing, hole making, punching and inspection to produce a finished product. The method solves and improves the indexes, such as sound absorption, heat insulation, dust prevention, attractive appearance and easy cleaning, of the automotive carpet and makes the automotive carpet reach international advanced level-III and meet the design requirements on environmental protection, attractive appearance, comfortableness, sound absorption and heat insulation of an automotive cab. In a plastic absorption process, a pneumatic pre-feeding device is used to ensure the thickness of the foamed leather on the highly-stretched part of the large section of the product, so the overall quality of the product is improved, the quality consistency of the product is guaranteed, the production efficiency is improved greatly and the labor intensity is relieved greatly. The compression and lamination of the sound-absorption and heat-insulation carpet improve the sound and heat insulation performance of the product and make the appearance of the product smooth and elegant and touch comfortable. In the while production process of the product, no harmful matter is produced, and the product is an environmentally-friendly product.

The invention discloses a perovskite solar cell module package structure which is used for packaging a plurality of perovskite solar cells into a photovoltaic module. The plurality of perovskite solar cells are connected in series and / or in parallel through inter-connected conductive circuits, the perovskite solar cell module package structure comprises a backside substrate, a package adhesive and front glass and is characterized in that the package adhesive comprises a solar cell package adhesive and a module package adhesive, the solar cell package adhesive is used for packaging a single solar cell, the module package adhesive is used for jointly packaging the plurality of solar cells, the solar cell package adhesive adopts a colorless and transparent epoxy package adhesive, an organic silicon package adhesive, a polyurethane package adhesive or an ultraviolet photocuring package adhesive, and the module package adhesive adopts an ethylene-vinyl acetate copolymer and a polyvinyl butyral or ethylene-octene copolymer and fills a space among the backside substrate, the perovskite solar cells, the inter-connected conductive circuits, the solar cell package adhesive and the front glass. The invention also provides a perovskite solar cell package method.

The invention relates to a mine flameproof and intrinsic safety type variable frequency speed control device, which comprises a frequency converter consisting of a three-phase rectifier, a filtering capacitor and an IGBT inverter, a control device, and a flameproof case body, wherein the control device comprises an isolating switch, a power frequency and secondary control loop, and a variable frequency and control loop. The variable frequency speed control device has a variable frequency operating mode and a power frequency operating mode, and gives priority to the variable frequency operating mode complemented with the power frequency operating mode, thus the variable frequency speed control device not only can regulate the speed and save energy better, but also has the advantages of dust control, moisture protection, flame protection, and the like; and the variable frequency speed control device adopts digital display, which not only has a function of remote and approach controls, but also has functions of displaying electric energy, namely displaying load electric energy clearly, and temperature control, and has protection functions of surge protection, open phase protection, over voltage protection, under-voltage protection, and the like. The variable frequency speed control device can be applied to underground places with coal dust or gas coal dust explosion in coal mines to perform controls of starting, stopping and variable frequency speed control on a three-phase flameproof motor, and performs various protections on the motor. The variable frequency speed control device adopts a variable frequency speed control method which is advanced and can be widely popularized.

The invention discloses a chitosan water-soluble combination agent and application of the chitosan water-soluble combination agent. The chitosan water-soluble combination agent comprises 10-80 parts by mass of chitosan and 20-90 parts by mass of amino acid composition and further comprises 0.01-5 parts by mass of essence. The essence comprises one or a combination of several of natural essence, equivalent natural essence and artificial synthetic essence. The deacetylation degree of the chitosan is larger than 50%, and the purity of the amino acid composition is larger than 90%. The deacetylation degree of the chitosan is preferably larger than 80%. Application of the chitosan water-soluble combination agent comprises the steps that the chitosan water-soluble combination agent is dispersed in water to form a chitosan combination agent water solution, and the chitosan combination agent water solution is applied to the fields of air purification, bacterium inhabitation, moisture preservation, dust prevention, freshness preservation, water quality purification, cosmetics, food and the like.

The invention discloses an adjustable medicine dispensing device, which comprises a medicine bottle and a medicine dispensing cap, wherein the medicine dispensing cover is composed of an inflow piece, a medicine dispensing piece, a metering piece, a medicine dispensing piece, an adjustment piece, an outer cover and a sealing cap. A method of dispensing medicine based on an adjustable medicine dispensing device. The round hole of the metering piece is rotated to make the medicine dispensing hole coincide with the medicine dispensing hole of the lower medicine piece, and the medicine powder flows into the metering through the inflow piece and the medicine dispensing hole of the lower medicine piece. The piece fills it up, and continues to rotate to make the medicine outlet hole coincide with the medicine outlet hole of the medicine outlet piece, so as to complete the metering and medicine discharge. The invention has the advantages of simple structure, convenient use, convenient installation and maintenance, and is used for dosing, metering and compartmentalization, can be recycled and utilized, saves resources, is well isolated from the outside world, and can prevent dust and air leakage.

The invention discloses an injection molding device for extrusion cutting. The injection molding device comprises a strip-shaped bearing base. An extrusion cutting injection molding mechanism is arranged at the center position of the upper surface of the strip-shaped bearing base. The injection molding device has the beneficial effects that by means of the device, injection molding is convenient, injection molding inner extrusion forming is good, residual plastic materials can be convenient to cut and recycle, rotation forming is conducted for facilitating dust prevention, an injection molding die is convenient to replace, and drying is convenient.

The invention relates to an intelligent temperature control vanadium dioxide composite film with enhanced infrared regulation capacity. A vanadium dioxide film and a silicon dioxide film are compounded into the composite film; the silicon dioxide film is located on the surface layer; the silicon dioxide film has a nanometer porous structure which is formed by piling the SiO2 particles with hydrophobic groups on the surfaces; the grain size of the SiO2 particles is 10nm-50nm; the vanadium dioxide film is formed by irregular VO2 particle depositions; the grain size of the VO2 grain size is 20nm-150nm. According to the preparation method, the silicon dioxide gel is coated on the vanadium dioxide film surface and is annealed under an inert gas atmosphere. The intelligent temperature control vanadium dioxide composite film provided by the invention can keep excellent optical properties and self-cleaning function and meanwhile can greatly promote the infrared regulation capacity of the composite film.

The invention discloses a transformer with good dustproof and heat dissipation effects, and the transformer comprises a supporting mechanism, a protection mechanism, a heat dissipation mechanism, a controller and a temperature sensor; the supporting mechanism comprises a base, universal self-locking wheels, a drying box, a drying agent, through holes and limiting grooves, the limiting grooves aresymmetrically formed in the upper portion of the base, the drying agent is arranged in the drying box, and the drying agent is arranged in the limiting grooves; the protection mechanism is arranged above the supporting mechanism, and a sound insulation plate is connected to the inner side wall of the dustproof shell. According to the transformer with the good dustproof and heat dissipation effects, the temperature sensor is arranged, when the temperature sensor detects that the temperature in the dustproof shell exceeds a set value, the temperature sensor can transmit detected information to the controller, and the controller starts the draught fan and the refrigerating device to discharge cold air into the dustproof shell through the air exhaust head; therefore, the transformer body in the dustproof shell can be quickly cooled, and the transformer body can be effectively prevented from being damaged due to over-high temperature of the transformer body.

It solves the complex structure and difficult processing of the existing seal device for the bearings of cooling drive device for vehicles. With major shaft and belt wheels on the cooling drive device, this seal device is set at the end face of the belt wheel, comprises a seal washer embedded outside the seal cover on the major shaft, said seal cover fixed with the inner ring of the bearing and the major shaft, seal washer fastening with the belt wheel, seal cover and seal washer locking with each other with the gaps forming into a labyrinth seal. It has fine anti dust and water proof performance with reduced friction noise and heat. It is convenient for loading and unloading with low cost.