37results about How to "To filter" patented technology

The invention discloses an improved regulation and storage system for urban road rainwater collection and green land conservation. The improved regulation and storage system comprises a control system, a drainage ditch, a coarse filtration tank, a fine filtration tank, a regulation and storage tank and a back-flushing device, wherein the drainage ditch, the coarse filtration tank, the fine filtration tank, the regulation and storage tank and the back-flushing device are communicated in sequence, a frame-shaped filtration grille for filtering the rainwater collected by a rainwater perforated strainer is hung at the top end of a wall body of the drainage ditch, a filtration screen is arranged at the connecting position of the drainage ditch and the coarse filtration tank, a seepage well is communication with the regulation and storage tank through a drainage pipe, a filtration structure for filtering the rainwater is arranged at the top end of the seepage well, and the bottom of the seepage well is installed in a sponge water-storage layer. The regulation and storage tank comprises a side wall, a bottom wall and a plurality of watering water pipes, the back-flushing device comprises a water inlet pipe, a water pump, a back-flushing pipe and a blow-off pipe, and the bottom end of the coarse filtration tank and the bottom end of the fine filtration tank are communicated through a mud discharging pipe. The control system comprises a control unit, a magnetic valve and a plurality of humidity sensors. A liquid level sensor is installed on the upper surface of the section, where the regulation and storage tank is located, of an overflow pipe. The water pump, the humidity sensors and the liquid level sensor are all connected with the control unit.

The invention belongs to the technical field of centrifugal fans, and specifically relates to a glass fiber reinforced plastics type acid and alkali resistant fan. The glass fiber reinforced plastics type acid and alkali resistant fan comprises a housing, a motor, a rotating rod, blades, a dust collecting mechanism and a sterilizing mechanism, wherein the motor is fixedly mounted on the outer surface of the inner end of the housing; the rotating rod is rotatably connected to the front end of the motor and is arranged in the housing; the blades manufactured through stainless steel are fixedly mounted at the front end of the rotating rod; the dust collecting mechanism, comprising a rubber sheet, mounting frames, mounting blocks, a mounting rod and a coat, is arranged at the front ends of the blades; the rubber sheet is embedded into the walls of the fans, and two mounting frames are arranged at the front end of the rubber sheet; the mounting frames are uniformly symmetrically fixedly mounted on the inner front surface of the housing; and the mounting blocks are arranged in the mounting frames. The glass fiber reinforced plastics type acid and alkali resistant fan mainly solves the problem that a fan in the prior art is poor in effect of working close to a chemical factory and cannot be used for absorbing particles in air as well as removing bacteria in the air.

The invention discloses a method and a device for isolating lights. Incident lights penetrate through an optical filter so as to filter out lights with needless wavelengthes; the filtered incident lights rip into a 3 / 4 slide along the direction perpendicular to the 3 / 4 silde; o lights and e lights in the 3 / 4 silde have the same propagation direction and orthogonality vibration directions; and emergent lights formed by the o lights and the e lights are linearly polarized lights which are perpendicular to the slide. By utilizing the technical scheme of the invention, and under the premises of ensuring high isolation, low insertion loss, high stability, high reliability, lowered cost and simple package, the filteration effect can be achieved at the same time, so that the properties of optical products are further improved.

The invention provides an airbag-type repeated smoke filtering breathing device, which comprises a smoke removal module, a breathing module, an air intake module and a mist removal module, wherein the smoke removal module comprises a water tank, a water mist module and a filter module; an air inlet hole and an air outlet hole are designed in the water tank; a water absorbing pipe is designed on the water mist module; the filter module comprises a baffle plate; an anti-overflow baffle plate is designed at the upper part of the filter cavity; an air hole is designed in the anti-overflow baffle plate; the breathing module comprises an exhaust pipe and a breathing cover; the air intake module comprises an air suction airbag, an air suction pipe and a diffusion module; a through hole is designed in the diffusion module; a one-way valve is designed in the through hole in the diffusion module; the mist removal module comprises a mist removal pipe; and a water absorbing sponge is designed in the mist removal module. The airbag-type repeated smoke filtering breathing device is the device capable of preventing a user from breathing toxic smoke in a fire scene.

The invention provides an easy-to-clean automobile air-conditioning filtering apparatus. The easy-to-clean automobile air-conditioning filtering apparatus comprises a rotation module, a positioning module, and a filter module; the rotation module includes a rotation shaft, a front end of the rotation shaft is provided with a positioning plug, and a rear end of the rotation shaft is provided with abearing; the positioning module includes a fixing plate, and a rear side of the fixing plate is provided with symmetric supporting plates; the filtering module includes a fixing ring; the outer ringsurface of the fixing ring is provided with centrally symmetrical fan blades, and the rear side surface of the fan blade is provided with a guiding groove; and the rear side of the fan blade is provided with a filter screen. The easy-to-clean automobile air-conditioning filtering apparatus can automatically adsorb and filter dust particles when the airflow is circulated through a fan-type structure, and ensures the normal airflow of an automobile air conditioner at the same time; and in addition, the external structure is convenient for subsequent cleaning and re-utilization.

The invention belongs to the technical field of eye drops, and particularly relates to eye drops for delaying treatment of juvenile myopia and a preparation method thereof. The eye drops are preparedfrom the following components in percentage by weight: 0.005 to 1 percent of atropine or pharmaceutically acceptable salt thereof, 0.1 to 10 percent of a thickening agent, 0.001 to 0.5 percent of a complexing agent, 0.001 to 0.05 percent of a bacteriostatic agent, a pH value regulator, 0.1 to 0.9 percent of an osmotic pressure regulator and a proper amount of water for injection, wherein the pH value regulator is used for regulating the pH value of the eye drops to 3.5 to 6.5. According to the preparation method, hydroxypropyl methylcellulose sprayed by a spray gun A is fused by the water forinjection sprayed by a spray gun B, and meanwhile, a solution in a rectangular pool forms liquid rotational flow under the impact of the water for injection, so that the solution flows in the rectangular pool, the dissolving efficiency of the hydroxypropyl methylcellulose is improved, and the preparation efficiency of the eye drops for delaying treatment of juvenile myopia is further improved.

The invention discloses a gantry type filter press convenient in filter residue cleaning and relates to the technical field of gantry type filter presses. The gantry type filter press comprises a crossbeam and is characterized in that a first support leg and a second support leg are fixedly connected to the left and right sides of the crossbeam through bolts, connecting columns are fixedly connected to the opposite sides of the first support leg and the second support leg, first sleeves sleeve the opposite sides of the two connecting columns, and a collecting tank is fixedly connected to one ends, away from the connecting columns, of the first sleeves. The gantry type filter press has the advantages that the filter press is provided with a motor, a drive wheel, a driven wheel, a conveyingbelt, a first rotary shaft, a bearing, a thrust plate, fixing rods, a filter frame, a compression plate, a second rotary shaft and a second sleeve, so that the filter frame can clean internal filter residues through rotation, and the problems that a large number of filter residues are accumulated inside the filter frame of the gantry filter due to filtering and are inconvenient to clean are solved.

The invention belongs to the technical field of preparation of sodium sulfite and in particular relates to a method for recycling the sodium sulfite from a desulfurization waste solution. The method for recycling the sodium sulfite from the desulfurization waste solution comprises the following specific steps: S1: removing suspended impurities in the desulfurization waste solution; S2: removing heavy metal ions in the waste solution; S3: enabling sodium sulfate in the waste solution to react to generate the sodium sulfite; S4: cooling and crystallizing to prepare anhydrous sodium sulfite. Thesuspended impurities are mixed and adsorbed in advance, and then stirring is carried out to increase the adsorption effect, so that the effect of filtering out the suspended impurities in the desulfurization waste solution is realized; heavy metal particles in the desulfurization waste solution are taken out through a precipitation manner, so that the phenomena that normal recycling of the heavy metal particles is influenced and the eating safety is influenced by heavy metal are avoided; the phenomena that oxidization treatment on the sodium sulfite is caused and the efficiency of preparing the sodium sulfite is influenced are avoided through the effect of pumping oxygen gas in vacuum; the purity of the sodium sulfite is ensured through crystallizing and preparing the anhydrous sodium sulfite.

The invention relates to the technical field of wood fiber production equipment, and discloses a filtering device for wood fiber powder. The filtering device comprises a screening box, a fixing frameis fixedly connected to the top of the screening box, a first motor is fixedly connected to the top of the fixing frame in a sleeved mode, a rotating rod is fixedly connected to an output shaft of thefirst motor through a coupler, and a bearing is fixedly connected to the middle of the surface of the top of the screening box in a sleeved mode. According to the filtering device for the wood fiberpowder, the problem that wood chips and sand in the wood fiber powder are filtered insufficiently is solved, the first motor, the rotating rod, the bearing, a carrying box, a feeding pipe, screening pipes, first screening plates, first filtering holes and second filtering holes are arranged, large wood chips in the wood fiber powder are filtered out through the first filtering holes, then sand inthe wood fiber powder is filtered out through the second filtering holes formed in the surfaces of the first screening plates, and therefore the effect of filtering the wood fiber powder is achieved.

The invention discloses a reagent bottle, which comprises a bottle body for containing detection reagents. A separation tube is arranged on the bottle body for reducing volatilization of the detection reagents, an opening on the separation tube is soaked in the detection reagents so as to form liquid sealing, the direct contact area of the detection reagents contained in the bottle and the external air is reduced, and the aim for reducing volatilization of the detection reagents is achieved. A sampling port for extracting the detection reagents is arranged on the bottle body, and an air treating part is arranged on the upper portion of the separation tube so that in a liquid taking process, the air entering the reagent bottle through the separation tube can be treated and accordingly oxygen and microorganisms including bacteria can be removed. The air treating part comprises deoxidization assemblies and degerming assemblies which are arranged in distribution mode, and air firstly passes through the deoxidization assemblies and the degerming assemblies and then enters the reagent bottle through the separation tube so as to achieve the aim of deoxidization and degerming.

The invention relates to the field of automobile air-conditioning equipment, in particular to an automobile air conditioner filter. The automobile air conditioner filter comprises a shell, an air inlet is formed in the top of the shell, an air outlet is formed in the bottom of the shell, and a filter element and an exhaust fan are arranged between the air inlet and the air outlet; the filter element comprises a non-woven fabric layer, an activated carbon layer and a polypeptide antibacterial layer, wherein the non-woven fabric layer, the activated carbon layer and the polypeptide antibacterial layer are sequentially arranged in a stacked mode, the non-woven fabric layer is used for removing large particulate matter, the activated carbon layer is used for adsorbing fine particles, the non-woven fabric layer is formed by accumulating multiple layers of non-woven fabrics, the activated carbon layer comprises activated carbon broken particles and a gauze element which is arranged on the surfaces of the activated carbon broken particles in a wrapping mode, and the polypeptide antibacterial layer comprises a polypeptide product and gauze which is arranged outside the polypeptide product in a wrapping mode; the exhaust fan is located between the polypeptide antibacterial layer and the air outlet. The automobile air conditioner filter has the advantages that by arranging the exhaust fan, the ventilation quantity of the filter is greatly increased, the air permeability of the filter is greatly enhanced, meanwhile, the adsorption effect is good, the polypeptide antibacterial layer can further play a bactericidal role, and the phenomenon that a large number of bacteria aggregate in the filter is effectively avoided.

The invention discloses a novel multipurpose ball valve, and relates to the technical field of ball valves. A flow inlet is formed in one side of a valve body, a flow outlet is formed in the other side of the valve body, a valve rod penetrates the top of the valve body, a flow adjusting assembly is arranged on the top of the flow inlet, a wrench is fixedly installed on one side of the top of the valve rod, a ball body is arranged at the position, located inside the valve body, of the bottom end of the valve rod, and a rotating shaft is arranged at the bottom end of the ball body. The novel multipurpose ball valve is scientific and reasonable in structure and convenient to operate; the flow adjusting assembly is arranged, and therefore an adjusting bolt can be adjusted to drive a streamer adjusting plate to adjust up and down, flow adjustment inside the flow inlet is achieved, and a certain buffer effect is achieved; a cutting plane is arranged, and therefore the impact resistance and the wear resistance of the ball body are improved when the ball valve is closed; and a filtering net is arranged inside a water inlet hole, certain filtration treatment on solid particles and impurities in fluid can be carried out, and installing and detachment of the ball valve are simple.

The invention discloses an anti-winding mechanism for an intelligent sewage pump, relates to the technical field of water pumps, and aims to solve the problem that sewage enters a sewage pump and winds around an impeller of the sewage pump. The anti-winding mechanism specifically comprises a filtering part; the filtering part is formed by welding a rotational flow pipe and a filtering pipe througha laser seamless welding technology; a filtering assembly is arranged in the filtering pipe and comprises a filtering plate and a sealing frame; the same sliding rod is welded to the inner wall of the axis of the filtering plate and the inner wall of the axis of the sealing frame; the sliding rod is slidably connected to the inner wall of the filtering pipe; a limiting plate is fixed to the outerwall of the other side of the sliding rod through a bolt; the outer wall of the sliding rod is sleeved with a spring; uniform second water permeable holes are formed in the inner wall of one side ofthe filtering pipe; sealing protrusions corresponding to the second water permeable holes in position are integrally formed on the outer wall of the sealing frame; and first water permeable holes staggered with the second water permeable holes are formed in the inner wall of the filtering plate. With the anti-winding mechanism, fibrous dirt cannot enter the sewage pump to wind around the impeller,and the service life of the sewage pump is prolonged.

The invention provides a thrombus filter for preventing the cerebral embolism. The filter comprises a collection part, a collector, a diversion part and a sealing part, the diversion part, the sealingpart and the collection part are integrally formed, so that the diversion part and the sealing part are of a curved structure as a whole; the edges of the diversion part and the collection part are provided with the sealing part; the collection part and the sealing part and the diversion part transit smoothly, the side, facing an arterial branch, of the collection part protrudes, the outer wall of the collection part adapts to the inner wall of the left subclavian artery in the artery branch, a hoop bundle is fixedly connected to the end, away from the diversion part, of the collection part,and the other end of the hoop bundle is detachably connected with the collector. According to the thrombus filter for preventing the cerebral embolism, the structural design is reasonable, embolization materials of the whole filter are drained to the collector and collected through the collector, then collection and filtration are conducted through the collector, the collector is subjected to surgical replacement, not only is the service life of the filter prolonged, but also the phenomenon that the filter influences the blood pressure balance in the body of a patient is avoided.

The invention relates to the technical field of direct-current screens, in particular to a function-adjustable direct-current screen which comprises a direct-current screen body, a plurality of buffer blocks are fixedly connected to the two sides of the direct-current screen body, protective shells are fixedly connected to the two sides of each buffer block, a machine shell is fixedly connected to the upper ends of the protective shells, and the protective shells are fixedly connected to the lower ends of the machine shell. A motor is fixedly connected to the interior of the machine shell, fan blades are fixedly connected to the end of an output shaft of the motor, a fan blade support is further fixedly connected to the upper end of the protective shell, a protective door is rotationally connected to the outer wall of the protective shell, and an observation window is formed in the protective door. The rotating angle of the baffle in the empty groove can be controlled by rotating the knob through cooperation of the worm gear and the worm, so that the flow rate of air circulation in the equipment is adjusted, the heat dissipation efficiency is further controlled, the equipment can be changed according to the surrounding environment, the use stability of the direct-current screen is improved, and the service life of the direct-current screen is prolonged. And the service life of the equipment is long.

The invention discloses a full-degree-of-freedom air pressure floating type deburring device, and relates to the technical field of machining device. The full-degree-of-freedom air pressure floating type deburring device comprises a deburring device body, a main shaft, a middle shaft layer and a bottom shaft, the top of the deburring device body is movably connected with a connecting shaft, the bottom shaft is arranged at the top of the connecting shaft, and the middle shaft layer is fixedly installed at the top of the bottom shaft; a main shaft is fixedly installed on the inner side of the middle shaft layer, and a sealing shaft is fixedly installed on the top of the middle shaft layer. According to the full-degree-of-freedom air pressure floating type deburring device, through mutual cooperation of an air inlet pipe and an air inlet hole, air is injected into the air inlet pipe and enters an air pressure chamber through the air inlet hole, so that the function of increasing the internal air pressure is achieved, a mounting block is ejected out through the internal air pressure by a movable piston, then the function of adjusting the floating force is achieved through the amount of the injected air, the problem that the internal buoyancy of the device cannot be controlled, so that the sensitivity of spindle movement is reduced is solved, the sensitivity of the spindle is improved, and the deburring effect is better.

The invention discloses a screening and iron removing device used in the production process of ceramic product raw materials, which comprises a raw material barrel, and is characterized that two extension grooves are formed in the raw material barrel, two extension supporting rods are movably inserted in the two extension grooves, the outer parts of the two extension supporting rods are in contactwith the inner walls of the extension grooves, and first sleeve plates are movably sleeved on the outer parts of the two extension supporting rods respectively. The screening and iron removing devicehas the beneficial effects that sieve pore plates are fixedly mounted between the two fixed sleeve plates so as to achieve a filtering effect; a vibrator in the vibrating case is fixedly connected with a connecting pull rod, a connecting spring movably sleeves the outer part of each extension supporting rod in a matched mode, and thus the first sleeve plate and the second sleeve plate have an elastic shaking effect, so that raw materials on the sieve pore plates are better sieved; a rotating shaft rod in the motor box extends into the two sieve pore plates, and iron removal treatment is conducted on the sieved raw materials in cooperation with an iron removal magnetic rod outside the rotating shaft rod.

A power line carrier radiation detection ring assembly comprises a detection ring and a winding, the detection ring is formed by hinging a first semi-ring and a second semi-ring, the winding is woundon the detection ring, is a twisted pair and is formed by mutually winding a first wire and a second wire, the twisted pair is divided into a first wire and a second wire by the branching module at the tail ends of the first semi-ring and the second semi-ring, the first wire and the second wire enter from the wire inlet hole and extend out from the wire outlet hole respectively, the two ends of the first wire are connected with the input end, the two ends of the second wire are connected with the load, and the load is used for filtering interference waves from the outside. When the detection ring works, the detection ring is directly sleeved on a power line for radiation detection, and the effect of radiation detection is much higher than that of a traditional power line carrier detectionantenna due to large contact area and load filtering interference waves.

The invention discloses a smoke collecting and processing device for a plastic sheet die head. The smoke collecting and processing device comprises the plastic sheet die head, a plastic sheet, a water tank, a sealing cover, a gas outlet pipe, an activated carbon treatment tank, a water ring vacuum pump, a tubular cooler, a gas-liquid separator and a tail gas treatment box; the plastic sheet die head is installed on the top of the water tank, the sealing cover is arranged on the top of the water tank, the plastic sheet is extruded out of the output end of the plastic sheet die head, and the air outlet pipe is arranged on the top face of the water tank; the water tank is connected to the activated carbon treatment tank through the air outlet pipe, and the activated carbon treatment tank is connected to the tubular cooler through the water ring vacuum pump; the exhaust end of the tubular cooler is connected to the gas inlet end of the gas-liquid separator; and the exhaust end of the gas-liquid separator is connected to the tail gas treatment box. The smoke treatment device is simple in structure, convenient and fast; the energy consumption is low; and circulating water is adopted, so that secondary pollution is avoided.

The invention discloses a multifunctional efficient lighting device, which relates to the field of efficient lighting. The device is simple in structure and convenient to use, the position of mountinga lamp shade (namely a light source) can be adjusted to be closer to a main lighting area, so that the efficient lighting effect is achieved; meanwhile, an adjustable secondary lamp shade is arranged, the light condensation effect and the light condensation range can be adjusted according to actual conditions, use is convenient, refrigeration or heating is conducted through the temperature control assembly, air supply is conducted through an air blower, the device has the refrigeration and heating functions and is more convenient to use, the device is higher in universality and more convenient to use by installing and connecting the air blower, and the practicability of the device is improved. A filtering assembly is arranged, the filtering effect can be achieved, the purpose of purifyingair is achieved, a collecting assembly is arranged, the effect of collecting slag ash can be achieved, and the slag ash can be extracted out of the base shell and is convenient to clean.

The invention relates to an ozone air purifier, which comprises an annular electrolytic cavity, in which several concentric annular siphon pieces are arranged, and annular siphon grooves are arranged between the siphon pieces, and the siphon pieces are made of insulating materials. Made; a liquid storage tank is fixed at the bottom of the electrolysis cavity, and the bottom of the annular siphon extends into the liquid storage tank; a vent hole is arranged on the top of the electrolysis cavity, and an insulating A number of electrolysis electrode rods are also arranged on the electrolysis cavity, and the two ends of the electrolysis electrode rod are respectively fixedly connected with the outer wall surface and the inner wall surface of the electrolysis cavity. section; a power supply assembly is provided in the cylindrical middle of the electrolysis space, a power supply contact is provided on the side of the electrolysis electrode rod facing the inner wall of the electrolysis cavity, and several strip grooves are arranged on the power supply assembly. There are conductive strips, the conductive strips are connected to the power supply contacts, and the electrodes between two adjacent conductive strips are opposite.

The invention discloses a boring machine with a spindle nose provided with a cooling system. The boring machine comprises a main body, wherein a processing device is arranged in the middle of the left side of the top of the main body; the top of the outer wall of one side of the processing device communicates with a water spraying pipe; the right side of the top of the main body is fixedly connected with a workbench; a movable frame is arranged on the right side of the top of the workbench; and the top of the movable frame is fixedly connected with a processing platform. The invention relates to the technical field of machine tools. According to the boring machine with the spindle nose provided with the cooling system, cooling liquid flowing out of the water spraying pipe falls on the surface of a boring head body and is fully collected through the processing platform, and thus, the situation that the cooling liquid is scattered around the device and is not easy to clean is prevented; rotation of a power machine improves power for processing of the boring head body, and meanwhile, waste chips generated during processing are collected; and the cooling liquid in a water collecting tank can be recycled, a fixing mechanism is tightly attached to an auxiliary mechanism, and the processing efficiency of the device is further improved.

The invention belongs to the technical field of gastric lavage machines, and particularly relates to a circulating filtering type gastrointestinal surgery gastric lavage machine which comprises a gastric lavage machine shell and a filtering assembly. The filtering assembly comprises a shell mechanism; the shell mechanism comprises an outer shell; a first filtering unit and a second filtering unit are clamped and mounted at the bottom end of the inner wall of the outer shell, and sleeving parts are fixedly connected to the top ends and the bottom ends of the first filtering unit and the second filtering unit. The cover plate mechanism is connected to the top end and the bottom end of the shell mechanism in a clamped mode, a first locking hole and a first sliding groove are used in cooperation, the purpose of guiding installation of a first gastric lavage tube and a second gastric lavage tube is achieved, a second locking hole and a second sliding groove are used in cooperation, and the purpose of guiding installation of a first blow-off tube and a second blow-off tube is achieved; and the assembling efficiency of the filtering assembly and the gastric lavage machine shell is improved.

The invention provides an easy-to-clean automobile air-conditioning filter device, which includes a rotating module, a positioning module and a filtering module; the rotating module includes a rotating shaft, the front end of the rotating shaft is provided with a positioning plug, and the rear end of the rotating shaft is provided with There are bearings; the positioning module includes a fixed plate, and a symmetrical support plate is arranged on the rear side of the fixed plate; the filter module includes a fixed ring; the outer ring surface of the fixed ring is provided with centrally symmetrical fan blades , the rear side of the fan blade is provided with a diversion groove; the rear side of the fan blade is provided with a filter screen; the easy-to-clean automotive air-conditioning filter device is a fan-type structure that allows the airflow to circulate automatically when it flows The dust particles are adsorbed and filtered, and at the same time, the normal air volume of the car air conditioner is ensured; in addition, the subsequent cleaning and reuse device is facilitated through the external structure.

The invention discloses a vacuum smelting device for an intermediate frequency furnace. The vacuum smelting device comprises a furnace body; a bearing plate is fixedly installed on the outer side wallof the furnace body; an assembling plate is fixedly installed at the upper end of the bearing plate through a supporting column; a flow dividing assembly communicates with a filtering assembly through a first air pipe; one end of a corrugated pipe penetrates through a cover in a sealing mode and communicates with the furnace body; a first vacuum pump and a second vacuum pump are fixedly installedon the bearing plate; the power of the first vacuum pump is smaller than that of the second vacuum pump; a third air pipe communicates with the second vacuum pump; and a display screen of the flow dividing assembly can display the vacuum degree in the flow dividing assembly. Vacuum pumping operation of different gears is achieved, the purposes of high air pumping efficiency and low energy consumption are achieved, the structure is simple, use is convenient, the service life of a vacuum gauge is greatly prolonged, a filtering plate is detachably installed on a second box body, the filtering effect is achieved, and dismounting and cleaning are convenient.

The invention discloses a computer ash filtering case which comprises a case body, an air outlet device is fixedly connected to the left side of the case body, vent hole plates are fixedly connected to the upper surface and the lower surface of the air outlet device, an air outlet cover is fixedly connected to the right side of the air outlet device, an air outlet hole is formed in the right side of the air outlet cover in a clamped mode, the left side of the case is fixedly connected with an air inlet device, the air outlet device comprises a short pipe, and the left side of the short pipe is fixedly connected to the outer surface of the case. The invention relates to the technical field of computer software and hardware. According to the computer dust filtering case, filtered air enters the case through the air inlet device, so that a memory, a hard disk and other devices needing to be cooled in the case are cooled, and the effect of cooling the devices in the case is achieved; and the situation that the working capacity of the computer is slowed down due to the fact that the computer cannot be cooled due to accumulated impurities caused by the fact that the impurities in the air are attached on the devices in the case is avoided, and the effect of cooling the devices in the case is achieved.