110results about How to "Extend filter time" patented technology

The invention provides a preparation method of high-purity collagen protein sponge, and relates to a preparation method of collagen protein sponge. The preparation method of the high-purity collagen protein sponge is used for solving the problems that the collagen protein sponge prepared by using a conventional method is long in production cycle and low in yield and purity and has poor hemostasis performance. The preparation method of the high-purity collagen protein sponge comprises the following steps: step one. pretreating fresh bovine heel tendons; step two. extracting collagen protein; step three. centrifuging; step four. salting out; step five. dissolving; step six. carrying out gradient dialysis; step seven. pre-freezing; step eight. carrying out freeze drying; and step nine. sterilizing. The final product prepared by using the method has a smooth and flat surface and relatively good hemostatic performance and is uniform in pore size distribution. The product has relatively high purity (the total amount of amino acids reaches 97.73%), an obvious hemostatic effect and no abnormal taste, is safe, non-toxic, high in yield and short in time; liquid is clear without impurities; the production cycle is shortened; the whole preparation process is carried out at a room temperature; the biological activity of the collagen protein is maintained; and the application of the high-purity collagen protein sponge in clinical is improved.

The invention discloses an automatic backwashing filter and a working method, which are suitable for filtering impurities in sewage. The filter comprises a runner switching main valve, a valve plate and a barrel, the valve plate is arranged on an upper opening of the barrel, and the main valve is arranged on the valve plate and communicated with the interior of the barrel through a runner; two flow channels are arranged on the valve plate, one flow channel is a filtering flow channel communicated with the inner space of the filter screen, and the other flow channel is a backwashing flow channel communicated with the space between the filter screen and the cylinder body; the flow channel switching main valve comprises a valve body, a sewage draining exit, a water inlet and a water outlet are sequentially formed in the valve body from left to right, and a filtering outlet connected with the filtering flow channel and a backwashing outlet connected with the backwashing flow channel are sequentially formed in the lower portion of the valve body from left to right; wherein a two-position five-way reversing valve group capable of automatically switching a normal working mode or a backwashing mode according to the blockage condition of the filter screen is arranged among the drain outlet, the water inlet, the water outlet, the filter outlet and the backwashing outlet. The filter is simple in structure, does not consume energy, and automatically switches backwashing.

The invention discloses a cultivation water filtration method, including a cultivation water filtration step. The cultivation water filtration step includes that: cultivation water to be filtered passes through a filter screen in surge water flow state from the filter screen down-up under the driving of a power source. The invention also discloses a filtration device for realizing the cultivationwater filtration method, comprising a tank body and a filter screen arranged in the tank body; wherein the tank body is opened with a water inlet and a water outlet, the filter screen is arranged toward the water inlet direction in an inclined way and is arranged above the water inlet, the lower end of the filter screen is connected with a vertical clapboard, the filter screen and the clap board divide the space in the tank body into a sewage region and a clear water region, and the water inlet is communicated with the sewage region while the water outlet is communicated with the clear water region. The invention can cause masses of sewage to strike the filter screen under the driving of surge water flow and deposit downward, filtration time is increased, reverse washing frequency is reduced, and better filtration effect can be realized.

The invention discloses a filter with squeezing filtering bags. The filter comprises a barrel (1), an upper sealing head, a lower sealing head, an exhaust port (6), a feeding port, a discharging port, a squeezing media inlet and a squeezing media outlet and is characterized in that at least one filtering squeezing device is arranged in the barrel (1), a rigid pipe (13) provided with a through hole (16) is connected between an upper hole plate (10) and a lower hole plate (21) of each filtering squeezing device, a squeezing flow guide film (14) provided with the filtering bag (15) inside is connected into each rigid pipe (13) through an upper squeezing diversion film fixing part (11) and a lower squeezing diversion film fixing limit part (18) distributed with through holes, and an upper squeezing flow guide film limit part (12) distributed with through holes is arranged on the upper portion of each filtering squeezing device. The filter can automatically and continuously operate to perform cleaning of a filter screen and squeezing fluid exhaustion of filter slag in the filtering bags, squeezed filter slag dry cakes are retained in the filtering bags, the filtering bags are simple and convenient to replace, trouble of fluid-state filter slag pollution is avoided, and the filter is strong in applicability, large in unit area filtering amount of the filtering bags and low in operation cost.

The invention discloses a ceramic membrane aeration and micro-positive pressure ozone membrane regeneration water treatment method. Sewage after ozone micropore aeration treatment is conveyed into a membrane tank; when a membrane on a membrane module is blocked by microorganisms or organic matter, compressed air enters the membrane of the membrane module through a water outlet of the membrane module for high-pressure back flushing; contaminants attached to the surface of the membrane are separated from the surface of the membrane; after the back flushing of the compressed air, ozone is supplied to the membrane of the membrane module under critical micro-positive pressure; after a gel layer difficult to degrade on the surface of the membrane is decomposed and dissolved by using an ozone and air space, the compressed air is used for reverse purging of decomposed substances on the membrane to accomplish membrane flushing; a nano ceramic membrane with small pore size distribution, small transmembrane pressure and a very small pore size is used for aeration; the micro-positive pressure aeration is adopted to form many fine and uniform oxygen bubbles to make full use of an oxygen source; oxygen is better dissolved in water; a utilization rate of the oxygen is increased; a biochemical effect is enhanced; and the energy source waste is reduced.

The invention discloses a novel graded gas filtering device and belongs to the technical fields of medical equipment and health care. The novel graded gas filtering device comprises a shell part and a filtering part; the shell part comprises an upper cover and a lower shell. The upper shell and the lower shell are in firm and sealed connection; the filtering part is used for filtering by grades according to the sizes of object particles in gas and is mounted and fixed on a convex ring of the upper cover. The upper cover is mainly combined with the filtering part, so that the aim of fixing components of the filtering part is realized, and the filtering part and the upper cover have very good firmness and sealing property after being mounted; the shell part is mainly used for protecting the filtering part and risk of damaging the filtering part is avoided. The novel graded gas filtering device disclosed by the invention can be used for filtering gas discharged in a laparoscopic surgery and a surgery environment of a medical establishment is effectively protected from pollution, so that the physical and psychological health of medical personnel and patients is guaranteed; meanwhile, the novel graded gas filtering device has the advantages of simple structure, convenience for operation, high gas filtering efficiency, safety and cleanliness and the like.

The invention discloses an efficient air filter. According to the air filter, when air containing moisture enters cylindrical inclined holes, electrostatic dust removers are adopted to adsorb suspended particles in air by using the electrostatic adsorption principle, and dust collecting plates are driven by motors to clean dust adsorbed by the electrostatic dust removers; a water tank is arranged to further remove dust; a bent pipeline can prolong the filter time of air in water; by pumping of a pressure pump, water in the water tank is atomized through a mesh-shaped atomizing plate for spraying in the manner of multi-layer water mist so as to further filter and purify air. By adopting the air filter, humidity of air purified by water mist is increased, the dew point of water vapor compressed by a lobed rotor compressor is reduced, and moisture is coagulated and separated in a condensing pipe and flows out along the inclined holes; filtered air is dried, reaches the periphery of a filter paper cylinder, and enters a central cylinder after filtering, so that filter paper is prevented from being damped.

The invention discloses an automobile engine oil-gas separator. The automobile engine oil-gas separator comprises a lower hollow cavity (1) and an upper shell (2); a gas inlet pipe (4) where mixed oil and gas enters is connected to the lateral face of the lower hollow cavity (1); an oil outlet pipe (5) is arranged at the bottom of the lower hollow cavity (1); a gas outlet pipe (6) is arranged on the upper shell (2); the lower hollow cavity (1) is internally provided with a first separation mechanism and a second separation mechanism; the first separation mechanism comprises a separation support (8) used for guidance and a cavity body (20) communicated with the gas inlet pipe (4); the cavity body (20) is located in the upper portion of the lower hollow cavity (1); the upper end of the separation support (8) is fixed to the inner wall of the upper portion of the cavity body (20) in a sealed mode; the gas inlet pipe (4) and the outer circumference of the cavity (20) is in tangential connection. The automobile engine oil-gas separator is high in efficiency and good in filtering effect.

The invention discloses a wine bar-type filter element and preparing method, which comprises the following steps: arranging sinter molding super high molecule polyethylene or high density polyethylene bar-type filter element layer in the middle; fritting inserter and fin separately; sticking and fixing on the two end; sieving raw material; allocating; die-filling; caking; cooling; demoulding; assembling; getting the product. This bar-type filter element possesses higher catching ratio and stable filtering accuracy, which can proceed backward and forward flush.

The invention discloses a compressor air filter element and relates to the technical field of manufacturing of compressor accessories. The compressor air filter element comprises an inner cylinder and an outer cylinder, which are provided with meshes; a top cover is arranged at the tops of the inner cylinder and the outer cylinder; an air inlet is formed in the middle of the top cover; a plurality of cylindrical filter pieces, which are vertically arranged in a staggered way, are arranged between the inner cylinder and the outer cylinder; and the cylindrical filter pieces are carbon-fiber cylinders. Compared with the prior art, the compressor air filter element can solve the problems of a conventional compressor air filter element that the contact time of air flow and a main filtering element is short, the contact area of air flow and the main filtering element is small and the filtering effect is poor.

The invention relates to a method for rapidly determining the content of toluene insoluble substances in heavy oil. The method comprises the following steps: (1) preparing materials, namely keeping afilter material for testing constant weight for later use; (2) performing sample treatment: weighing a proper amount of a uniform sample, putting the sample into a clean beaker, adding a hot toluene solvent according to a certain solvent-oil ratio (solvent volume: sample mass), and carrying out ultrasonic treatment to completely dissolve and disperse the sample; (3) testing the sample, namely performing reduced-pressure suction filtration on the dissolved sample by using a solvent filter through a constant-weight glass fiber filter membrane, washing by using a hot toluene solvent until the filtrate is nearly colorless, and stopping suction filtration after insoluble substances on the glass fiber filter membrane are completely pumped; and (4) performing result calculation: drying the filtermembrane subjected to suction filtration to constant weight, and calculating to obtain the content of toluene insoluble substances in the sample. The method has the characteristics of simplicity andconvenience in operation, high testing speed, good repeatability and high precision.

The invention relates to a screen-replacement-free gas filtering device which comprises a rectangular shell, two cavities are formed in the shell, air outlet holes are formed in the front side and the rear side of each cavity, a through hole is formed in the middle of the shell, a sliding block is arranged in the through hole, each cavity is provided with two arc-shaped plates, upper air holes are formed in the left side face and the right side face of each sliding block, and lower air holes are formed in the lower end face of each through hole. An air inlet is formed in the lower end face of the shell, the sliding block slides to any end of the through hole, the two arc-shaped plates at the corresponding end can block the air outlet, the upper air hole is communicated with the lower air hole, the air inlet is closed, the air inlet at the opposite end is opened, back-flushing cavities are formed in the upper ends of the two cavities, filter screens are fixed to communicating openings of the back-flushing cavities and the cavities, and piston plates are arranged in the back-flushing cavities; the sliding block is pulled to move through deformation of the arc-shaped plate, the filtering area is increased and the filtering time is prolonged through deformation of the arc-shaped plate while non-stop screen replacement is achieved, meanwhile, the blocked filter screen is subjected to back flushing, and the screen replacement and back flushing efficiency is greatly improved.

The invention discloses a sewage treatment pipeline with filter devices.The sewage treatment pipeline comprises a pipeline.The pipeline comprises at least one U-shaped pipeline and inverted-U-shaped pipelines, liquid outlet ends of the U-shaped pipelines of the pipeline are connected with liquid inlet ends of the adjacent inverted-U-shaped pipelines, and ascending pipelines, where water flow flows from bottom to top, of the pipeline are ascending pipelines.The sewage treatment pipeline has the advantages that at least one Teflon filter screen with a downward opening is arranged in each ascending pipeline, the water flow flows through the Teflon filter screens with the downward openings from bottom to top, the Teflon filter screens are made of Teflon, accordingly, the filter time can be prolonged, the filter screens can be prevented from being blocked, and excellent filter effects can be realized; the sewage treatment pipeline is provided with shaking devices, accordingly, the filter effects can be improved, impurities adhered on the Teflon filter screens can be reduced, and the Teflon filter screen replacing and cleaning time can be shortened.

The invention relates to a method for adding a vertical type leaf filter filtration aid. The method comprises the following steps of: mixing lime milk with a crude liquid or refined liquid in a filtration aid preparation tank in advance to fully stir to generate 3CaO.Al2O3.6H2O as the filtration aid for later use; feeding the prepared filtration aid to hang a cloth through a leaf filter feeding pump during a cloth hanging step of the leaf filter; feeding from a crude liquid groove in a normal filtering step to ensure that the filtered refined liquid is subjected to a subsequent procedure through a refined liquid groove; performing settling separation, washing or pre-desilicication on a filter cake by red mud to finish once operation; and carrying out a new round of circular working period. The method has the advantages and the effects that the addition amount of the filtration aid is greatly reduced, the consumption amount of the lime milk is indirectly reduced, the loss of aluminum oxide is also reduced, the coating effect also can be improved, a bridging function of the filtration aid is intensified, the normal filtering time is prolonged, the speed is low when the resistance of the filter cake is increased in the same filtering period, and the power consumption of the feeding pump is greatly reduced.

The invention discloses a sewage treatment pipeline filtering device having a jittering function. The sewage treatment pipeline filtering device comprises at least one filtering device in a vertical pipeline, wherein the filtering device is composed of a support frame and a Teflon filter screen, the Teflon filter screen sheathes the support frame, a water inlet is formed at the bottom end of the vertical pipeline, the opening of the Teflon filter screen is arranged downwards, and a jittering device is arranged at the outer side of the Teflon filter screen in the vertical pipeline. According to the sewage treatment pipeline filtering device, at least one Teflon filter screen with the downward opening is arranged in the vertical pipeline, water flows pass through the Teflon filter screen with the downwards-arranged opening from bottom to top, the Teflon filter screen is made of Teflon, the filter time is increased, the blocking phenomenon of the filter screen is avoided, the filtering effect is good, and the filtering effect is improved and the adhesion of impurities on the Teflon filter screen is reduced due to arrangement of the jittering device, and the replacement and cleaning time of the Teflon filter screen is reduced.

The invention provides a water heater capable of improving a water purifying effect. A water purifying device is mounted at the bottom end in an inner container of the water heater, and the water purifying device comprises a shell, a water blocking shunting device and a filtering water purifying substance. A first cavity is defined through the fit of the shell of the water purifying device and the bottom of the inner container, or the first cavity is formed by the shell of the water purifying device. A water inlet pipe of the water heater extends out of the shell of the water purifying device, and a hole allowing the water inlet pipe to penetrate through in the shell of the water purifying device is sealed with the outer wall of the water inlet pipe. A water outlet hole in the lower part of the water inlet pipe of the water heater is located in the first cavity, an opening is arranged in the shell of the water purifying device for communicating the first cavity with the other space of the inner container, and the water blocking shunting device and the filtering water purifying substance are arranged in the first cavity and between the opening and the water inlet pipe. According to the water heater capable of improving the water purifying effect, water in the inner container can be treated, both the contact area and contact time of the water with the filtering water purifying substance are increased, the purifying effect is improved, after-sale installation is facilitated, and hidden water leakage danger is avoided.

The invention discloses an agricultural seed screening device which comprises a box body, wherein a base is arranged below the box body; a buffering mechanism is arranged between the base and the boxbody; and a first filtering plate, a second filtering plate and a third filtering plate are arranged in the box body. The agricultural seed screening device improves the defects in the prior art; under the action of a guiding plate, material slides to the highest end of the corresponding filtering plate, so that the material can obtain the longest filtering time to eliminate the defects of the existing device; under the action of a hot-air blower, hot-blast air enters a caching box and a flow guiding cavity along an air guiding tube and then spray out from an air ejector tube to carry out blow-drying treatment on the material on the surfaces of the filtering plates, so that drying of the material is facilitated; and the drying manner increases the air blowing area and is high in practicality.

The invention discloses an intelligent cleaning system based on pet excrement. A housing is provided with an accommodating cavity, a placing groove, a filtering frame, a first filter screen, a secondfilter screen, a flexible separating plate, a rotating shaft and a top cover. A purification device comprises a lamp frame, an ultraviolet lamp, a drying device, an air purifier and an ozone generator. A storage device comprises an excrement storage cabin, an excrement bag storage cabin and a sand soil storage cabin. A packaging device comprises a cleaning unmanned machine and a connecting mechanism. A detecting device comprises a first camera, a second camera, a third camera, an ozone detector and an infrared sensor. A gripping device comprises a gripping rail, a gripping frame, a gripping motor, a gripping roller, a gripping hydraulic pump, a gripping hydraulic rod, a gripping mechanical arm and an automatic banding machine. A moving device comprises a moving motor, a moving roller and afixing mechanism. A wireless device is installed in an internal position of a processor. The processor is installed in an internal position of the housing.

A pulse bag dust collector, including a shell, a dust hopper communicated with the shell is fixedly connected under the shell, an air inlet pipe passes through the outer wall of the dust hopper, and one end extends into the dust hopper. A number of air inlet holes are evenly distributed on the end surface of the tube facing the housing, and a partition is also provided in the housing, which divides the housing into two independent cavities, and the upper cavity is connected with a The exhaust pipes are connected, and a plurality of through holes are evenly distributed on the partition, a filter bag is installed on each through hole, and a blowing pipe with the blowing direction facing the filter bag is arranged above each through hole. A plurality of turbulence devices are installed in the ash hopper between the air inlet pipe and the partition. The invention can evenly divide the dusty gas, reduce the number of pulse injections and prolong the service life of the filter bag.

The invention belongs to the field of environmental protection, and particularly relates to a wastewater recovery device for environmental protection. The device comprises a water storage barrel, the lower surface of the water storage barrel is movably connected with a drainage device, the lower part of the inner wall of the drainage device is slidably connected with a spring support rod, and the bottom end of the inner wall of the spring support rod is fixedly connected with a centrifugal rotating machine. Through holes are uniformly formed in the middle of the inner wall of the processing cylinder, eight filter pipes are fixedly connected to the middle of the inner wall of the processing cylinder through the through holes, and one end of each filter pipe extends to the outside of the processing cylinder. Compared with a static precipitation method, the method for filtering the wastewater through the device canspeed up filtration time of wastewater, so that efficiency of wastewater treatment is improved, and a lot of time is saved; and wastewater and residues can be separated in a pressurization mode, so that more wastewater can be extruded out of the processing cylinder, the water outlet rate is higher, and water resources are saved.

The invention discloses a low-energy-consumption sewage filtering device which comprises a main body unit, a filtering unit, a sludge discharging unit and an electric control unit, the main body unitcomprises a bottom plate, a positioning plate, a base and a sludge collecting box, and the positioning plate, the base and the sludge collecting box are sequentially arranged at the top of the bottomplate from left to right; hydraulic cavities are formed in the two ends in the base, and a first piston is slidably arranged in each hydraulic cavity, supporting columns are vertically arranged at thetwo ends of the top of the first piston, the top ends of the four supporting columns extend to the top of the base to be fixedly connected with a filtering box, and the supporting columns extend intothe filtering box. In the process that the sliding rod pushes the concentric-square-shaped frame to move upwards, the second magnetic strip located on one side of the movable strip can continuously get close to the first magnetic strips, the movable strip can be continuously pushed to move through repulsive force generated by the first magnetic strips and the second magnetic strips, and then gasin the strip-shaped movable cavity is exhausted from the vent holes of the exhaust pipe and impacts the bottom of the filter screen, and sludge is prevented from depositing at the top of the filter screen.

The invention relates to the technical field of fire fighting, and discloses a long-distance transmission device for fire alarm, which comprises a lower box body, an upper box body is arranged at the top of the hollow part of the lower box body, a partition plate is fixedly connected to the inner wall of the joint of the lower box body and the upper box body, and a suction pump is fixedly mounted at the center of the top of the partition plate. A smoke alarm is fixedly installed in the center of the top of the upper box body, and air suction holes distributed in an annular array mode are formed in the annular outer wall of the top of the upper box body. According to the long-distance transmission device for fire alarm, the lower box body moves directionally in a shopping mall, the suction pump sucks air in the shopping mall into a cavity of the lower box body through an air suction pipe, a suction cover and an air suction hole, a smoke alarm detects the air, and a data transmission device feeds back detected signals to a background to achieve the purpose of long-distance transmission of the fire alarm. According to the invention, the long-distance transmission efficiency of the fire alarm in the shopping mall is improved, and the purpose of detecting the fire alarm in the shopping mall in real time for 24 hours is achieved.

The invention discloses a water supply and drainage control device convenient to operate, and relates to the technical field of water supply and drainage. The device aims to solve the problems that existing water supplementing control mainly depends on a valve, water cut-off time exists when the valve is blocked, the irrigation efficiency is affected, and the labor amount of personnel is increased. The device specifically comprises a base, a shell body is fixedly mounted on one side of the top of the base, an adjusting valve is fixedly mounted on the other side of the top of the base, two filtering cavities are formed in the shell body, mounting grooves which are of L-shaped structures are formed in the inner walls of the two filtering cavities, and a filtering mechanism is fixedly mountedbetween the two mounting grooves. Any of the two filtering cavities is used while the other is standby valve rods of the four adjusting valves can be driven to rotate at the same time by a main driving motor, so that the opening and the closing of the adjusting valves on the two sides are conducted at the same time, and the seamless switching of the device can be achieved. Therefore, filtered impurities in the device can be cleaned conveniently, and the operation is easy and convenient.

The invention discloses efficient wastewater treatment equipment. The equipment comprises a box body, a partition plate and a lower supporting plate are installed in the box body, a filler filtering area is formed between the top face of the box body and the lower supporting plate, the lower supporting plate is located above the partition plate, the lower supporting plate and the partition plate are perpendicular to each other, and a liquid mixing area and a liquid collecting area are arranged on the two sides of the partition plate respectively; and the box body is provided with a wastewaterinlet, a dosing port and a liquid outlet pipe, the wastewater inlet and the dosing port are respectively communicated with the liquid mixing area, the liquid mixing area is communicated with the filler filtering area, the filler filtering area is communicated with the liquid collecting area, and the liquid collecting area is communicated with the liquid outlet pipe. The filtering time of wastewater in the filler filtering area is prolonged, the filtering efficiency is improved, the filler is convenient to replace regularly, and the filtering effect is guaranteed.

The invention discloses an air filter of a compressor and relates to the technical field of manufacturing of accessories of compressors. The air filter comprises a casing provided with a cover; an air inlet is formed in the cover; an air outlet is formed in the bottom of the casing; an air filter element is arranged in the casing and comprises an inner cylinder with meshes and an outer cylinder with meshes; a top cover is arranged at the top of space between the inner cylinder and the outer cylinder; and multiple cylindrical filter pieces arranged vertically in a staggered manner are arranged between the inner cylinder and the outer cylinder and are carbon fiber cylinders. Compared with the prior art, the air filter has the advantage that problems of short contact time and small contact area of air flows of existing air filters of the compressors with main filter components and poor filter effect can be solved.

The invention relates to a mobile box type river and lake water defluorination device which comprises an internally hollow outer shell, wherein a mixing part and an after-treatment part are respectively arranged on two sides in the outer shell; a filtration part is arranged between the mixing part and the after-treatment part; adsorption filtration is realized by an activated alumina adsorption filtering plate in the filtration part after performing chemical coagulation in the mixing part, wherein the activated alumina adsorption filtering plate can be reused by regeneration treatment after adsorption to reach saturation. For surface water containing excessive fluorine, the mobile box type river and lake water defluorination device performs first-stage treatment by chemical coagulation ofa composite defluorination coagulant and performs second-stage treatment by adsorption filtering of activated alumina, and has characteristics of non-stop operation, no need to stop the operation forregeneration, high defluorination selectivity, relatively easy regeneration, good defluorination effect, convenient use and mobility.

The invention relates to a recycling container and cleaning equipment, belongs to the technical field of household appliances, and aims at solving the problem that an existing recycling container is difficult to clean. The recycling container comprises a recycling containing cavity provided with a fluid inlet for allowing dust-containing fluid to enter the recycling containing cavity; a filtering barrel, which is used for carrying out solid-liquid separation on the dust-containing fluid entering the recycling containing cavity, is mounted in the recycling containing cavity, and is provided with a liquid inlet; and a fluid pipeline. One end of the fluid pipeline is communicated with the fluid inlet, and the other end of the fluid pipeline is communicated with the liquid inlet, so that the dust-containing fluid is guided into the filtering barrel. The recycling container is provided with the filtering barrel, so that solid-liquid separation of dust-containing fluid entering the recycling container is realized, solid impurities and waste liquid in the dust-containing fluid entering the recycling container are stored in a partitioned manner, the recycling container is convenient to clean, and bacterial nourishing caused by mixing of the solid impurities and the waste liquid is avoided.

The invention discloses an oil fume filtering device capable of cooling oil fume, belongs to the technical field of kitchen appliances, and is designed for solving the problem that an existing deviceis poor in oil fume cooling effect. An oil fume collecting cavity is formed in the top of a filtering body, an air inlet hole communicated with the oil fume collecting cavity is formed in the bottom of the filtering body, an air outlet hole communicated with the oil fume collecting cavity is formed in the top of the filtering body, a first exhaust net corresponding to the air inlet hole is arranged in the filtering body, a first partition plate is arranged at the top of the first exhaust net, a second air exhaust net is arranged above the first partition plate, a third air exhaust net is arranged above the second air exhaust net, a second partition plate is arranged between the second air exhaust net and the third air exhaust net, a connecting hole used for communicating the second air exhaust net and the third air exhaust net is formed in the second partition plate, and a third partition plate is arranged at the top of the third air exhaust net. According to the oil fume filtering device capable of cooling oil fume, the oil fume cooling effect is improved.