3406 results about "Air filtration" patented technology

The invention belongs to the technical field of environmental sanitation machinery, and particularly relates to a high-speed low-noise centrifugal fan with an air filtering effect, the high-speed low-noise centrifugal fan comprises a fan volute, a fan impeller is mounted in the fan volute, the fan impeller comprises a front disc, a middle disc and a plurality of fan blades, the fan blades are located between the front disc and the middle disc, and the fan blades are arranged in the fan volute. A flow channel of the fan impeller is formed by the front disc, the middle disc and the space between every two adjacent fan blades, and a driving motor is installed on the rear side of the fan volute. According to the high-speed low-noise centrifugal fan with the air filtering effect, brand new plans are made on the blade shape, the blade structure, the volute, the volute tongue and the overall structure of the fan, and particularly, the cyclone separator is additionally arranged at the air inlet of the fan, so that high-speed air entering the volute of the fan is rapidly separated and purified; and dust and other garbage in the gas are settled and separated, so that the quality of air discharged into the atmosphere from an outlet of the fan is improved, and secondary pollution of environmental sanitation operation is reduced.

The invention relates to the technical field of air filtration, in particular to an indoor air purifier with a self-cleaning filter screen. Comprising a base and a filter cartridge on the upper surface of the base, the upper port of the filter cartridge is fixedly connected with a top seat with an air outlet hole; the air outlet hole is communicated with the inner side of the filter cartridge; the inner wall of the air outlet hole is fixedly connected with a fan; the upper end opening of the air outlet hole is fixedly connected with a protective net; the outer diameters of the top seat and the base are greater than the outer diameter of the filter cartridge; the outer side of the filter cartridge is sleeved with a protective cover with air holes; a spiral plate is movably connected between the inner side of the protective cover and the outer side of the filter cartridge; the inner edge of the spiral plate is in contact with the outer wall of the filter cartridge; a collecting tank is arranged in the base; according to the air purifier, the spiral plate rotates on the outer wall of the filter cartridge, so that dust and fibers formed after filtration on the outer wall of the filter cartridge are rotated away by the rotating spiral plate, the cleanness of the filter cartridge is ensured, and the filtering and purifying effect of the air purifier on surrounding air is improved.

The present invention proposes a nanofiber composite vehicle air filter paper with a gradient structure and a preparation method thereof, which is used to solve the technical problems of poor bonding strength between nanofibers and substrates and low filtration efficiency in nanofiber filter materials. The present invention uses a preparation process combining electrostatic spinning and electrostatic spraying to prepare a nanofiber composite vehicle air filter paper, which includes an ultrafine nanofiber mesh layer, a nanofiber layer and a filter paper layer arranged in sequence. The present invention has a good effect on PM under industrial standard wind speed conditions. 0.3 The initial filtration efficiency of particulate matter can reach 99.9%, reaching the H12 standard for air filtration materials. More importantly, in the self-cleaning backflush test, after 10,000 backflush tests, the PM 0.3 The filtration efficiency can still be maintained above 90%. This provides a new strategy for high-performance nanofiber filtration materials, which is of great significance to the high-tech, high-quality, green and sustainable development of nonwoven materials and filtration materials.

The present invention is an electrospun web including a carrier substrate and an electrostatically charged nanofiber. The electrospun web has a pressure drop of about 5 mmH2O or less, a percent penetration of about 50% or less, and a clarity of about 80% or more.

The invention discloses an ionic liquid modified polyimide nanofiber film and an air purification filter screen based on the ionic liquid modified polyimide nanofiber film, and belongs to the technical field of film filtering materials. The preparation method comprises the following steps: firstly, selecting a diamine monomer and a dianhydride monomer to carry out low-temperature polycondensation reaction, and then carrying out solvent replacement and freeze drying to obtain polyamide acid powder; dissolving the powder to obtain a polyamide acid spinning solution, preparing an ionic liquid / polyamide acid spinning solution on the basis, and carrying out electrostatic spinning to obtain an ionic liquid / polyamide acid nanofiber membrane; and finally, carrying out high-temperature thermal imidization treatment to prepare the ionic liquid / polyimide nanofiber membrane. The method is simple and efficient, the problems of low resistance, high pressure drop and the like of a traditional nanofiber film in air filtration are solved, development and application of the nanofiber film in the field of air filtration are further widened, and the nanofiber film has important scientific significance and application value in the fields of high-temperature filtration, gas adsorption and the like.

The invention relates to the field of air filtration, in particular to a method for rapidly preparing ZIF-8 / polypropylene melt-blown cloth fiber membranes in batches at low cost. Aiming at the problems of high cost, long preparation time, complex process and the like of the existing method for growing ZIF-8 on the surface of polypropylene melt-blown cloth to improve the air filtering performance, the invention provides a method for rapidly preparing ZIF-8 / polypropylene melt-blown fiber membranes in batches at low cost. The preparation method comprises the following steps: firstly, pretreating the surface of polypropylene melt-blown cloth by using an inorganic aqueous alkali solution, then sequentially putting the melt-blown cloth into a zinc ion aqueous solution and a 2-methylimidazole / N, N-dimethylformamide mixed aqueous solution under an ultrasonic condition, and drying to prepare the ZIF-8 / polypropylene melt-blown fiber membrane. According to the preparation method, water is taken as a main solvent, and a small amount of N, N-dimethylformamide is added into the water, so that rapid growth on polypropylene melt-blown cloth at a small molar ratio of 2-methylimidazole to zinc nitrate hexahydrate is realized, and the preparation method is suitable for large-scale industrial production for air filtration.

The invention relates to the technical field of tunnel ventilation and environmental protection, in particular to an efficient and energy-saving tunnel ventilation and dust removal integrated system. Data analysis and decision making; ventilation control; dust removal operation; and sewage treatment. The intelligent sensing module is installed in the tunnel, environment parameters of different positions can be accurately obtained in real time and transmitted to the central control system, the efficient and energy-saving draught fan is selected, the frequency conversion and speed regulation device is installed, energy consumption is reduced, and by arranging the air filtering device and the dust falling device, the dust falling efficiency is improved. The dust collection device and the dust blocking device arranged at the tunnel portal effectively control the air environment quality in the tunnel, sewage purification and cyclic utilization are achieved through sewage treatment, and the system is high in intelligent degree, can be flexibly adjusted according to the actual situation and is suitable for popularization and application. The problems that a traditional ventilation and dust removal mode is high in energy consumption, poor in effect, lack of intelligent control and the like are effectively solved, the health of constructors is guaranteed, and pollution to the surrounding environment is reduced.

An Air filtering device (1) configured to cleaning of air in a closed volume of air. (1) comprises in a direction (2) of an air flow at least one air filter unit (3). The air filter unit (3) comprises an air filter (5) arranged in a box-shaped housing (4). The air filtering device (1) further comprises an air moving unit (6) interconnected to and arranged downstream with respect to the air filter unit (3). The air moving unit (6) comprises a box-shaped housing (7) with an air inlet opening (8), configured to receive filtered air from the closed volume of air through the air filter unit (3) and with respect to the box-shaped housing (7) opposite an air outlet opening (9) comprising a constriction having a smaller diameter (10) than the diameter of the air inlet opening (8). The air moving unit (6) also comprises a fan (11) interconnected to the air outlet opening (9) configured to draw in the filtered air from the air filter unit into the box-shaped housing (7) through the air inlet opening (8) and to push the filtered air into an air distribution unit (12). The air distribution unit (12) comprising a box-shaped housing (13) interconnected to the fan (11) and having at least one air vent (14) to distribute the filtered air into the closed volume of air.

An air filtering device for an air conditioner, in particular for filtering out particles, preferably pollutants, from air is provided. The air filtering device comprises a flow path through which air flows along a flow direction, an ionizer for generating ions in the flow path, and grid structure made of an electrically conductive material, that is upstream of the ionizer in the flow path in the flow direction, which forms a first electrode. A filter is downstream of the ionizer in the flow path in the flow direction which has a layer that forms a second electrode. The air filtering device also comprises a high voltage power source that has an electric pole and an electric counter-pole for generating a high voltage between the pole and the counter pole. The pole is electrically connected to the ionizer, or its discharge electrode, and the counter-pole is electrically connected to the first and second electrodes.

The embodiments provide a system and method for filtering out smoke and / or toxic gases / fumes from air in a building. The system integrates various smart devices with an HVAC system along with a controlling software application that can change the state of the smart devices, thereby controlling the types and quantities of air moving through the HVAC system at any time. In particular, the system can adjust the openings of one or more smart registers to control how much air passes in and out of the HVAC system over a given period of time. The system can also adjust the opening of a smart intake vent to control how much fresh (outside) air passes into the system over a given period of time. The system can also adjust the opening of a smart furnace valve that is disposed within the furnace.

The invention relates to the technical field of asphalt pavement crack repairing and reinforcing devices, in particular to a portable asphalt pavement crack repairing and reinforcing device which comprises a stock bin, an isolation working bin, an air suction assembly, an air injection assembly and a material injection assembly. An isolation working bin is arranged at the bottom of the stock bin, an air filtering chamber is arranged in the isolation working bin, the two ends of the air filtering chamber are communicated with the air suction assembly and the air spraying assembly respectively, a discharging port of the stock bin is connected with the material spraying assembly through a backflow material pump, the backflow material pump is arranged in the isolation working bin, and a material injection port is formed in the stock bin. The invention further provides a repairing method, in the device, the gas spraying assembly sprays clean gas, the gas suction assembly sucks blown dirty dust gas, circulation is formed, dust is prevented from flying about when dust cleaning is completed, and the body health of an operator is protected; after the asphalt crack dust is cleaned, the material spraying assembly injects the crack pouring solution to fill the asphalt crack, the two operations are performed synchronously and do not interfere with each other, the repairing steps are simplified, and the asphalt crack repairing efficiency is effectively improved.

The utility model relates to the technical field of bag-type dust removal, in particular to a pulse-type bag-type dust remover. Comprising a shell, a top cover, supporting legs, an air inlet pipe, an air outlet pipe, an air conveying pipe, a nozzle, a dust removal cloth bag and a blow-off pipe, a fixing frame is fixedly installed below an inner cavity of the shell, a double-shaft motor is installed on the fixing frame, a scraper is fixedly installed at one end of an output shaft at the bottom of the double-shaft motor through a fixing rod, and a rotating plate is fixedly installed at one end of an output shaft at the top of the double-shaft motor; and a plurality of convex blocks capable of striking the dust collecting cloth bag are fixedly arranged on the rotating plate. Dust attached to the outer wall of the dust collecting bag can be completely removed, and the air filtering efficiency is guaranteed.

The invention discloses a pseudo-ginseng seed storage method, relates to the technical field of seed treatment, and aims to solve the problems that pseudo-ginseng seeds are difficult to store, easy to lose vigor and severely mildew.The pseudo-ginseng seed storage method adopts a specially-made bionic microenvironment packaging unit to wrap the seeds, the inner layer of the specially-made bionic microenvironment packaging unit contains a moisture slow-release agent, and a bacteriostatic agent and active substances needed by germination can be intelligently released in a staged mode; the outer layer of the seed packaging box is a selective breathable film which integrates humidity and microbial contamination state indication functions and stress buffer characteristics, then the packaged seed is placed in an intelligent regulation and control storage cabin, and the temperature and humidity are accurately regulated and controlled by the storage cabin; gas components (such as low oxygen, high carbon dioxide or ozone) regulation and control, efficient air filtration and an intelligent monitoring and remote management system can be selected, the service life of the seeds can be remarkably prolonged, high germination rate and activity are kept, mildew is effectively inhibited, physiological after-ripening and germination are optimized, and intelligentization, standardization and refinement of seed storage management are achieved.

The invention relates to the technical field of air conditioning, and discloses a control method of air treatment equipment. The filter screen device of the air treatment equipment comprises a filter screen body used for filtering air; the ultrasonic generator is connected with the filter screen body in a contactable manner so as to transmit vibration energy of the ultrasonic generator to the filter screen body. According to the self-cleaning filter screen device, high-frequency vibration of the ultrasonic generator is used for conducting vibration cleaning on dust attached to the filter screen body, almost no dust remains on the filter screen body, cleaning is thorough, the cleaning efficiency is high, noise is low when the ultrasonic generator works, energy consumption is low, and the use experience of a user can be effectively improved through the self-cleaning filter screen device. The vibration intensity and the vibration frequency of the ultrasonic generator are controlled according to the environment temperature and / or humidity, and the cleaning effect is ensured.

The utility model discloses a fast cooling type milk mixer which comprises a base, a kettle body connected to the base, a heating assembly and a cooling assembly. The cooling assembly comprises an air pump, a jet head and an air inlet head, the air pump is installed in the base, the jet head is installed in the kettle body, and the jet head is communicated with the air outlet end of the air pump through a ventilation pipeline and used for conveying air to water in an inner cavity of the kettle body; the air inlet head is arranged on the base, communicates with the exterior of the base and communicates with the air inlet end of the air pump through an air duct. External air is pumped and blown into the inner cavity of the kettle body through the air pump, hot water is stirred, and cooling of the hot water is accelerated. The air filter element is installed on the air inlet head, the cooling assembly is started, the air pump can feed air into the air spraying head in the kettle body after the air is filtered through the air filter element, and therefore rapid cooling is achieved. Air is purified through the air filter element, the sanitation problem of blown air during blowing cooling is avoided, and the blown air is cleaner and more sanitary.

The embodiment of the utility model relates to the technical field of air filtration of engineering equipment, and provides an air filtration back-blowing assembly and an air filtration back-blowing device applied to the air filtration back-blowing assembly, the air filtration back-blowing assembly comprises a first barrel, a second barrel and a third barrel, the first barrel comprises a first closed end and a first ventilation end, and the first closed end and the first ventilation end are communicated; the first ventilation end is provided with a first air outlet; a group of first air inlet through holes are formed in the end face of the first ventilation end of the first barrel in the circumferential direction, and a group of second air inlet through holes are formed in the side wall of the first barrel in the circumferential direction; the two ends of the first filter element abut against the first closed end and the first ventilation end respectively and are arranged in the first containing space. The first air inlet through hole is positioned between the first filter element and the side wall of the first barrel; the annular blocking piece is located between the side wall of the first barrel and the first filter element and corresponds to the second air inlet through holes, and the bottom edge of the annular blocking piece abuts against the surface of the first ventilation end and passes through the first air inlet through holes. The first air inlet through hole is segmented through the annular blocking piece, the water drainage and dust exhaust effects are enhanced, the functions are diversified, and the effect is good.

The invention belongs to the technical field of air filtering, particularly relates to an air filtering device for metal powder processing, and aims to solve the problems of short service life and difficulty in replacement of a filter screen plate in the background technology, the air filtering device comprises a bottom pipe, a top pipe is arranged on the outer wall of the top of the bottom pipe, and the top pipe is arranged on the outer wall of the top of the bottom pipe. A filter plate replacing mechanism for conveniently replacing the filter plate and a filter plate cleaning mechanism for prolonging the service life of the filter plate are arranged on the bottom pipe and the top pipe, each of the filter plate replacing mechanism and the filter plate cleaning mechanism comprises two parts, and one part is positioned in the bottom pipe and the top pipe. Under the action of the filter plate cleaning mechanism, the filter screen plate between the bottom pipe and the top pipe can be cleaned, the filter screen plate can be automatically cleaned in the pipeline, the cleaning difficulty is greatly reduced, the service life of the filter screen plate is prolonged, the filter screen plate can be quickly replaced through the action of the filter plate replacement mechanism, and the screen replacement time is saved.

The invention belongs to the technical field of environmental protection equipment, and particularly relates to a textile workshop automatic dust filtering device which comprises an outer cylinder, a filtering mechanism used for filtering fiber dust in a textile workshop is arranged in the outer cylinder, and the filtering mechanism comprises a rotatable lower flow guide blade and a rotatable upper flow guide blade. The size of the lower flow guide blade is larger than that of the upper flow guide blade, a rotatable filter cartridge is arranged on the outer side of the lower flow guide blade, a plurality of connecting frames are arranged above the upper flow guide blade, and the connecting frames are arranged in an inclined mode. The friction balls on the surfaces of the matching rods adsorb and roll impurities filtered by the filter cartridge, the filter cartridge is self-cleaned, the situation that fiber chippings adhere to the filter cartridge to affect the air filtering effect of the filter cartridge is avoided, the filtering effect of the filter cartridge can be effectively improved, and the dust filtering efficiency of the dust filtering equipment on a textile workshop can be improved.

The invention relates to a flat-filter filter element for filtering a fluid, in particular for filtering air, for a filter system, in particular for an air filter system of a fuel cell system, having an arrangement of at least two flat-filter medium bodies being arranged adjacent to each other in an axial direction, so that the fluid can flow through them one after the other in the axial direction. The flat-filter filter element comprises an overmolded plastic frame that is directly molded to an outer circumference of one of the filter medium bodies, and the other one of the filter medium bodies is sealingly connected to the overmolded plastic frame by means of a circumferential cast element.

Mobile or stationary air filter (L) or room fan (RL) according to Figure 1, comprising an outer wall (5), a (2) for generating an airflow (3) which is guided through an air filter material (1.1), an air inlet (2.1) and an air outlet (2.2), wherein the air filter material (1.1) contains poly(styrenesulfonic acid) (sulfonic acid biocide) (1.3) cross-linked with divinylbenzene and / or an acidic salt (1.3.1) (sulfonic acid biocide salt) of the sulfonic acid biocide (1.3) with biocidal cations, wherein the sulfonic acid biocide (1.3) and / or sulfonic acid biocide salt (1.3.1)(i) are positively and / or materially bonded to and / or in inert carriers and, in the fixed state, are in direct contact with carrier materials (1.1.7) on and / or in which biocidal Metal microparticles of a mean particle size d50 of 0.1 µm to <1,000 µm are fixed, and / or (ii) with carrier materials (1.1.7) on and / or in which biocidal metal microparticles of a mean particle size d50 of 0.1 µm to <1.000 µm are fixed, are mixed; its use and methods for the production and environmentally friendly disposal of air filter materials (1.1).

The utility model relates to an air filter element device of an air compressor, and relates to the field of air filtration. The air filter element device comprises a shell, a plurality of air filter elements are arranged in the shell, the shell is provided with air conveying pipes in one-to-one correspondence with the air filter elements, a sealing disc used for connecting the air conveying pipes and the air filter elements is arranged in the shell, and one end of the sealing disc abuts against the sealing disc; the inner wall of the shell is provided with a quick release assembly used for connecting the air filter element with the air conveying pipe, and one side of the shell is provided with a cabin door. The multiple air filter elements are placed in the shell, the air filter elements are fixed to the inner wall of the shell through the fixing assemblies, the air filter elements correspond to the air conveying pipes one to one, and an operator only needs to regularly observe the states of the filter elements in the shell to judge whether the filter elements need to be replaced or not; and an operator can conveniently mount and dismount the air filter element through the quick dismounting assembly, so that the effect of uniformly managing the air filter elements of a plurality of air compressors in the same oxygen generator is realized.

The invention relates to the technical field of refrigeration equipment, in particular to energy-saving industrial refrigeration equipment which comprises an air inlet square pipe and a filtering square pipe, two clean channels are symmetrically designed on the filtering square pipe and can both communicate with a refrigeration assembly of the refrigeration equipment, an air filter screen is hinged to the interior of each clean channel, and the air filter screen is connected with the air inlet square pipe. A porous direct injection type filter screen cleaner is designed on the inner wall of the clean channel; the air inlet square pipe communicates with the output end of the induced draft fan, a selection assembly is installed in the air inlet square pipe, and the selection assembly can switch communication between the air inlet square pipe and any clean channel. The air filter screen has an inclined state and a vertical state, in the inclined state, the inclination angle of the air filter screen is adjustable, so that the air receiving angle of the windward side of the air filter screen can be adjusted, the air filter screen in the machine can be cleaned, and meanwhile air can be continuously and effectively filtered in a mode of switching clean channels.

The present invention relates to the field of dust removal technology, specifically an environmentally friendly air dust removal device, including a filter cartridge, a support frame, an air inlet, an air outlet and an auger spiral. The filter cartridge is cylindrical in shape, its axis is horizontal, and one side of its lower part has a discharge port. The support frame is located below the filter cartridge, and the support frame and the filter cartridge are elastically connected. The present invention is provided with an auger spiral, and sawdust generated by processing solid wood boards is used as an air filter medium, turning waste into treasure. The sawdust is compressed by the auger spiral, so that the sawdust forms a large surface area and a porous structure, so that when air passes through the sawdust, dust and other particulate matter and impurities in the air can be adsorbed by the sawdust, thereby achieving the effect of purifying the air, and combining the ecological concept of energy saving and environmental protection.

The invention discloses a fused electrostatic spinning polymer / molecular sieve blended composite fiber as well as a preparation method and application thereof. The melt electrostatic spinning polymer / molecular sieve blended composite fiber is prepared from the following raw materials in parts by weight: 25-90 parts of a thermoplastic polymer matrix, 5-75 parts of a molecular sieve, 1-10 parts of a compatibilizer and 0-5 parts of a conductive additive. According to the polymer / molecular sieve blended composite fiber material and the preparation technology, no solvent participates in the whole process, and the green manufacturing requirement is met. Moreover, in the fiber material, the molecular sieves can be uniformly distributed on the superfine polymer fibers, scanning electron microscope pictures show that the molecular sieves are uniformly embedded into the material, no aggregate larger than 10 microns exists, and the fiber material has a hierarchical pore structure, a high specific surface area and excellent mechanical properties. Therefore, the fiber material can be applied to the fields of air filtration, catalytic reaction, drying purification, adsorption separation and the like.

The present invention discloses an air filtration membrane based on nanohybrid-modified polylactic acid fiber and a preparation method thereof. The present invention adopts a microwave-assisted in-situ synthesis method to directly induce the in-situ growth of ZIF-8 nanocrystals on the surface of CNTs to obtain CNT@ZIF-8 nanohybrids. Through coaxial electrospinning technology, an air filtration membrane with CNT@ZIF-8 uniformly embedded in polylactic acid fibers is obtained. The preparation method of the present invention is simple and the conditions are controllable. The prepared air filtration fiber membrane has the advantages of high surface potential, large specific surface area, good air permeability, long-term filtration, etc., and is an air filtration material with broad application prospects.

The invention belongs to the technical field of lung function nursing, and discloses a nursing device for improving lung function after thoracic surgery, comprising: a back plate, two sides of the lower end of the back plate are respectively provided with an air filter box and a waste liquid inbox; an outlet of the air filter box is connected with a breathing mask through a hose; a mouthpiece is fixedly arranged on the breathing mask; a suction pump is arranged on the waste liquid inbox, the input end of the suction pump is communicated with a sputum suction pipe, and the sputum suction pipe is in sliding connection with the breathing mask; elastic ropes are fixedly arranged on the two sides of the lower end of the back plate, handles are fixedly arranged at the outer ends of the elastic ropes, and a monitoring mechanism is fixedly arranged on the back plate. The device can be conveniently used when a patient lies in bed, the device can be fixed to the back through the shoulder buckle belt and the waist buckle belt, the patient can hold the handles with two hands to stretch the elastic rope to conduct chest expanding training, the comprehensive evaluation module comprehensively evaluates the physical condition and the lung function condition of the patient, the drainage monitoring module monitors the drainage condition, and the risk prediction module conducts risk prediction.

The invention provides a clean air main machine with a dispensing device storage bin and a pneumatic dispensing system.The clean air main machine comprises a machine shell, an air source device and an air filtering device are installed in the machine shell, an air outlet port is formed in the machine shell, and the air source device is connected with the air outlet port through the air filtering device; the air outlet end opening is connected with the air inlet end of the medicine dispensing device, a containing bin used for containing the medicine dispensing device is formed in the machine shell, and sterilization equipment is arranged in the containing bin. Before the dispensing device is used, the dispensing device can be placed in the storage bin of the clean air main machine, the sterilizing device in the storage bin is used for sterilizing the dispensing device, the sterilized dispensing device is stored in the storage bin, and bacteria in air are prevented from entering and adhering to the dispensing device to cause pollution.

The invention discloses a preparation method of a PA6 / PEO micro-nanofiber air filtering membrane with a bent form, which comprises the following steps: (1) weighing PA6 particles and PEO powder with a certain mass, and dissolving in a formic acid solution with the mass fraction of 88% to obtain a mixed solution; (2) stirring the mixed solution to obtain a PA6 / PEO spinning solution; (3) forming a fiber membrane under a room-temperature dry condition through a gas jet spinning machine; (4) drying overnight at 60 DEG C to remove the residual solvent; (5) performing heat treatment in a drying oven, and (6) at normal temperature, placing the fiber membrane subjected to heat treatment in a container, and adding deionized water to immerse the fiber membrane; (7) heating the container in a water bath, and repeating the water bath treatment twice; and (8) immediately taking out the sample after the reaction is finished, and performing vacuum drying treatment. According to the invention, oily and salty ultrafine particles can be efficiently filtered at the same time, and the technical problem that effective filtration of fine oily and salty particles is difficult to realize in the prior art is solved by optimizing the structural characteristics of the fiber membrane.

A system of head protection with an integrated air filtration mechanism for protecting the user from impact / concussion and ambient air pollution. Example embodiments comprise a rigid helmet shell covering the head of the user and a fabric air barrier around the user's neck, a battery powered filtered centrifugal fan contained inside an external detachable cowl apparatus adjoins to a helmet external top spoiler with a mounting system that is easily removable to meet impact attenuation standards. The cowl apparatus directs clean filtered air into the duct system—a top spoiler funnel connected to an internal clean air duct and exits the visor air curtain providing continual clean laminar airflow between the user's face and the face shield. One or more sensors, calibrated to detect harmful particulates and a processor to automatically activate the system as a protective measure when harmful particulates are encountered and a sensor to detect when filter element needs replacement.

The new energy charging pile temperature control device comprises a charging pile body, a temperature control opening is formed in the bottom of the side end face of the charging pile body, a temperature control assembly is clamped in the temperature control opening, and an air cooling assembly is connected to the position, corresponding to the temperature control assembly, in the charging pile body. The temperature control assembly is used for driving air to enter the charging pile body through the temperature control assembly for forced air cooling; according to the charging pile, the air cooling fan drives air to penetrate through the temperature control assembly to enter the charging pile body for forced air cooling in the rapid rotation process, the air filter plate can effectively filter dust in the air in the process that the air penetrates through the air filter plate, and in the process, liquid water in the temperature control frame absorbs heat in the air, so that the heat in the air is dissipated; due to the fact that hot air has the characteristic of flowing upwards, the cooled air enters the charging pile body and then flows from bottom to top for forced air cooling, and therefore dissipation of heat of power equipment arranged in the charging pile body is accelerated, and the heat carried in the air is taken away through liquid water single circulation.