8 results about "Air filtration" patented technology

The invention discloses an efficient air purifying and filtering method. According to the method, a negative-ion generator and an electrostatic fiber material filtering unit jointly form an air purifying and filtering module, and negative ions are located at a wind feeding opening of an electrostatic fiber material in the wind inlet direction; the negative ions generated by the negative ion generator in the filtering module can be combined with dust or dust particles in the air, the air is charged, and the electrostatic fiber material filtering unit absorbs the particles; the air filtering module is low in wind resistance, high in efficiency and capable of eliminating PM2.5 and other fine particles, and belongs to an efficient filter. The purifying and filtering module is small in occupied space, efficient filtering of low wind resistance is achieved, ventilation energy consumption is greatly lowered, and the purifying and filtering module can be widely applied to air conditioners, air purifiers and central ventilation systems.

The invention discloses a preparation method of a cellulose aerogel-based efficient air filtering membrane, and belongs to the field of air filtering materials. The preparation method comprises the following steps: performing water washing, soda boiling, oxidation and the like on microbial cellulose, dispersing in a mixed solution of tert-butyl alcohol and water to obtain cellulose dispersion liquids with different concentrations, pouring the cellulose dispersion liquids into molds for molding, and performing freeze drying to obtain the microbial cellulose aerogel-based efficient air filtering membranes with different thicknesses. The microstructure of the air filtering membrane is a three-dimensional nanometer network formed by microbial cellulose nanofibers, the macroscopic form of the air filtering membrane is in a thin film shape, and the membrane forming process is a physical process, is free of chemical reaction and is green, simple and convenient; the air filtering membrane with the thickness of 1-5mm prepared by the method has high filtering efficiency of removing PM0.3 at a high air flow rate, the highest filtering efficiency can reach 99.9% or above, the air resistance is less than 250Pa, the preparation process is simple, and large-scale production is facilitated.

The invention discloses a composite filter plant for a fresh air fan. The composite filter plant for the fresh air fan comprises a primary filter screen, an efficient air filter screen, an electrostatic dust removal filter screen and a photocatalyst filter screen. The electrostatic dust removal filter screen and the photocatalyst filter screen are arranged between the primary filter screen and the efficient air filter screen, the photocatalyst filter screen is a thin film filter screen, nanometer titanium dioxide and tolyltriazole are mixed with each other to manufacture the thin film filter screen, and transition metal complexes are coated on the surfaces of the photocatalyst filter screen; the electrostatic dust removal filter screen is made of polypropylene treated by electrostatic electrets. The composite filter plant for the fresh air fan has the advantages that sterilization effects can be realized by the photocatalyst filter screen without perpendicular incidence of ultraviolet light, dust removal effects of electric fields can be realized by the electrostatic dust removal filter screen without being powered on, and accordingly energy consumption can be reduced; the composite filter plant can be washed, and the filter screens are convenient to clean.

The invention discloses a road construction dust removal device capable of avoiding secondary pollution, and relates to the technical field of dust removal devices. The road construction dust removal device capable of avoiding secondary pollution comprises a fixed vehicle plate mechanism, wherein a dust suction mechanism is arranged at the position, close to the left side, of the top end of the fixed vehicle plate mechanism, an air filtering mechanism is fixedly connected to the position, close to the center, of the right side of the dust suction mechanism, the outer wall of the air filtering mechanism is movably connected with the outer wall of the fixed vehicle plate mechanism through the arranged dust suction mechanism, and a dust collecting mechanism is arranged at the position, close to the back face, of the top end of the fixed vehicle plate mechanism. According to the road construction dust removal device capable of avoiding secondary pollution, dust generated in the road construction process is extracted, dust in air is reduced, the influence of construction dust on the sight of constructors is effectively prevented, and the situation that the construction dust influences the physical health of roadside pedestrians or constructors is reduced.

The invention discloses an air purifier with humidifying performance. The air purifier comprises a shell (203), a suction device (204) and an air filtering layer (205), wherein the shell is provided with an air inlet (201) and an air outlet (202), and the suction device (204) and the air filtering layer (205) are located between the air inlet and the air outlet. The air filtering layer comprises multiple air-permeable water storage layers (101), retainers (102) and water containing space (103), wherein the retainers arranged on the adjacent air-permeable water storage layers at intervals, and the water containing space (103) is defined by the adjacent water-permeable water storage layers and the retainers. The retainers are disposed on the inner wall of the shell. Accordingly, the air filtering effect is guaranteed due to the fact that air of the air purifier is at least filtered through two air-permeable water storage layers and water between the water storage layers. Meanwhile, the air is humidified, the whole structure is ingenious and simple, and practicality is high.

The invention provides an air filtering device for a condensing furnace. The air filtering device comprises an inner smoke pipe elbow and an outer smoke pipe elbow, one end of the inner smoke pipe elbow is connected with one end of the straight inner smoke pipe; the other end of the inner smoke pipe elbow is connected with the filtering inner pipe; one end of the outer smoke pipe elbow is connected with one end of the straight outer smoke pipe, the other end of the outer smoke pipe elbow is connected with the filtering outer pipe, the filtering outer pipe is sleeved with the filter shell, an annular sealing ring is arranged between the filtering outer pipe and the filtering inner pipe, and the part between the filtering outer pipe and the filtering inner pipe is divided into a first cavity and a second cavity through the annular sealing ring. A first through hole is formed in the filter outer pipe corresponding to the first cavity, a second through hole is formed in the filter outer pipe corresponding to the second cavity, and a filter screen sleeves the outer wall of the filter outer pipe. As mentioned above, the air filtering device for the condensing furnace solves the problems that in the prior art, only a smoke exhaust function and an air inlet function are provided, and dust and particles in air cannot be filtered out.