68results about How to "Act as a filter" patented technology

The invention discloses a method for manufacturing a dustproof photography module. The method comprises the following steps of: (1) manufacturing a lens, a light sensing chip and a planar printed circuit substrate; (2) manufacturing a hollow sealing layer with a thickness; and (3) manufacturing a light transmittance protection layer by a transparent material with a thickness, and arranging the light transmittance protection layer on the upper surface of the sealing layer, wherein the light transmittance protection layer completely covers the sealing layer; and an imaging protection region of which the perpendicular height is not less than 0.65 millimeters is formed between the position over the light sensing region of the light sensing chip and the upper surface of the light transmittance protection layer. The invention also discloses a device for implementing the method. The method and the device have the advantages that the sealing layer and the protection layer are arranged on the light sensing chip, so that an imaging distance is increased, and an image can be formed until the thickness of dust falling on the protection layer is more than 30 mu m; and the problem about dust prevention of the photography module is effectively solved.

A liquid leading pump beam method and device belongs to field of optics and laser photoelectron technique. It includes pumping light source, optical coupling device, liquid leading device and fiber. Thereinto: the optical coupling device receives the pumping light omitted by the pumping light source; liquid nozzle, the pumping beam coupled by the optical coupling device is coupled with liquid column spurted by the liquid nozzle; the central line of cooling fluid collector is aimed at the central line of the liquid nozzle; return flexible hose and liquid-in end are connected with the cooling fluid collector; radiator and circlulating pump are in series, the liquid-in port of the radiator and the liquid-out port of the return flexible hose are connected, the output end of the circlulating pump is connected with the lower end of the liquid nozzle; the liquid nozzle, the cooling fluid collector, the return flexible hose, the radiator and the circlulating pump are in series to form a liquid leading device. The invention resolves the high power pumping problem in solid laser and fiber laser, and the output power of laser can be increased, stability and reliability of laser system can be guaranteed.

The invention discloses a laser radar for a vehicle anti-collision avoidance system. A transmitting and receiving scanner is a dual-rotation laser transmitting and receiving scanner; the dual-rotation laser transmitting and receiving scanner includes a base and a rotation body of a transmitting window and a receiving window, wherein the rotation body is mounted on the base; the upper part of the rotation body is provided with a laser generator, a lens group and a reflector; the emergent light path of the reflector is aligned with the transmitting window; the back surface of the reflector is provided with a motor with a cam which cam drive the reflector to swing, so that the light path can carry out sector-shaped scanning; the lower part of the rotation body is provided with a laser receiving device; a conical reflector is installed at the receiving window; and reflected laser is reflected to a laser receiving probe through the conical reflector. With the laser radar of the invention adopted, the vehicle anti-collision avoidance system can achieve vertical sector scanning and rotary scanning simultaneously, and the radiation energy requirements of scanning laser beams can be reduced. The laser radar has the advantages of high safety, high accuracy and high sensitivity.

The invention discloses a metamaterial structure, a radome including the metamaterial structure and an antenna system. The metamaterial structure comprises a first medium substrate and a plurality of conductive geometric structures located on the first medium substrate, wherein each conductive geometric structure is a central-symmetry distribution pattern and the adjacent conductive geometric structures are separated from each other. Changes of shapes and sizes of the conductive geometric structures lead to a change of an electromagnetic wave response characteristic. The radome can improve wave-transparent performance of an electromagnetic wave with a work frequency range and can be served as a filter so as to restrain penetration of an electromagnetic wave with a non-work frequency range, and therefore, a signal to noise ratio of antenna work can be increased.

The invention relates to glass frosting technologies in the field of chemical processing and particularly relates to an ultracrystallite anti-glare frosting solution for colored glass and a frosting method for the colored glass. The method comprises the steps of preparing powder A from sodium fluoride, potassium fluoride, ammonium sulfate and potassium sulfate which are in the weight ratio of (7.0 to 8.2): (3.5 to 4.5): (1.8 to 2.2): (0.8 to 1.3), preparing powder B from calcium fluoride and barium sulfate which are in the weight ratio of (4.7 to 5.2): (5.8 to 6.3), adding the powder A and the powder B into ultrapure water according to the weight ratio of 75.0: 11.0 so as to prepare a solution, adding a dispersant into the solution, adjusting the pH to 3.0 with sulfuric acid so as to prepare the frosting solution, and carrying out frosting on the glass. Frosted inorganic glass has superior anti-glare effect compared with that of the traditional methods, the roughness Ra and glossiness Gs of the frosted inorganic glass are controllable in size, and the product quality is of uniformity and consistency.

The invention relates to a multipoint high-frequency microwave signal generating method; in the method, a 2*2 coupling, a Brillouin scattering device and a light filter are used for extracting pump signals and Stokes signals in one or multiple stages, and then the extracted signals are subject to beat frequency to generate one or a plurality of high-frequency microwave signals. The method comprises the following steps: firstly, designing an annular cavity structure based on Brillouin scattering, and arranging a Brillouin scattering device in the annular cavity so as to simultaneously obtain pump signals and Stokes signals in multiple stages; secondly, selecting two or a plurality of laser wavelengths the frequency interval of which is equal to that of the target microwave signal by using the light filter based on a preset reflectance spectrum, wherein all frequency components except for the selected laser wavelengths are inhibited; and thirdly, carrying out the beat frequency on the selected laser wavelengths to generate one or a plurality of microwave signals of which the frequencies are approximately integral multiples of 11GHz.

The invention discloses a farming greenhouse based on a solar generating system. The farming greenhouse includes a greenhouse body in which a space used for plantation is enclosed, a solar ceiling which is mounted on the top of the greenhouse body, a solar generating system which comprises a solar generating assembly which is laid on the solar ceiling. The solar generating system is laid on the ceiling of the farming greenhouse, the solar energy generation can be used for irrigation, illumination and the like, the surplus power can be sold to surrounding peasant households, the clean green energy can be provided, the cost can be reduced, and the environment can be protected. The solar assembly can directly replaces a ceiling of the farming greenhouse, the present farming greenhouse can be very conveniently modified, and the feasibility is high.

A fume dehumidification process is characterized in that a circulation dehumidifier is additionally arranged between a desulfurization island and a fume reheater; a drying agent flows in a plurality of conical funnels for enabling an upper section and a lower section of the circulation dehumidifier to communicate; at the upper section of the circulation dehumidifier, water in fume is absorbed, and a wet drying agent is dried by high-temperature fume to obtain a dry drying agent, and the dry drying agent is delivered to the upper section of the circulation dehumidifier by a lifting bucket to finish circulation of the drying agent, so that water in discharged desulfurized fume is reduced. The fume dehumidification process disclosed by the invention has the beneficial effects: (1) the fume is dehumidified and then heat is discharged, therefore haze is reduced; (2) the circulation of the drying agent is realized; (3) the circulation dehumidifier plays a role of bridging the desulfurization island with a fume reheater; (4) water consumption of a desulfurization system is reduced; (5) risk that the fume reheater equipment is blocked is eliminated; (6) quality of desulfurized gypsum is increased; (7) corrosion damage of the equipment is reduced; (8) heavy metal, such as mercury, can be removed.

The invention discloses a preposed denitrification aeration biofilter and a method for treating sewage and belongs to the field of wastewater treatments. The biofilter comprises a DN tank body and a CN tank body and further comprises a first water storage tank body, a second water storage tank body and an aeration pump, wherein a first water storage tank inner cylinder is placed in the middle of the first water storage tank body; an annular water storage tank buffering groove is arranged at the outer side of the first water storage tank inner cylinder; the height of the water storage tank buffering groove is lower than that of the first water storge tank inner cylinder; and the area between the side wall of the first water storage tank body and the first water storge tank inner cylinder is a first water storage tank storage area. As the water flowing direction of the DN tank is upward, suspended solids are prevented from concentrating in a filler layer, the dirt containing rate of a filler is increased, and backwashing interval time is prolonged. By adopting the preposed denitrification aeration biofilter, the dissolved oxygen of the feeding water of the CN tank can be improved without power, so that subsequent additional oxygen supply amount is reduced; and the preposed denitrification aeration biofilter has the advantages of simple structure, convenient operation and low energy consumption.

The invention discloses a preparation method of melt-blowing fabric dedicated for virus and bacterium filtering killing and belongs to the technical field of melt-blowing fabric production. The methodcomprises the steps that kieselguhr and a polymer raw material are prepared with a volume ratio of 0.3:1 for later use; the polymer raw material is measured, fed into a screw extrusion machine for melting and then extruded out; fibers are jetted out by a melt-blowing die head and then jetted through hot wind traction onto a mesh curtain driven by an accepting device; the kieselguhr raw material is heated and then synchronously jetted onto the mesh curtain; filtering-killing melt-blowing non-woven fabric is formed by sedimentation; and finally the fabric is rolled up by a winding device. According to the method disclosed by the invention, kieselguhr particles are adhered by heat carried by the melt-blowing fibers which are jetted after melting of the polymer raw material and are then adhered on a fusion surface layer of the mesh curtain, so that the filtering-killing non-woven fabric is formed. The melt-blowing fabric produced by the method disclosed by the invention has the beneficialeffects that a sharp shell imbedded with diatom is used and can be stuck on surfaces of viruses and bacteria; and shells or cell wall structures of same can be penetrated during reproduction and motion of the viruses and bacteria, so that the viruses and bacteria can gradually die of dehydration, so that physical filtering killing is realized.

The invention provides a drying and cooling system for production of cured powdery feed. A cooling tank of a cooler is divided into multiple layers, a turning plate type discharge mechanism as well asan upper material level device and a lower material level device for controlling material layer height is arranged independently on each tank layer, and an independent compressed air blowing system is arranged on each tank layer. The drying and cooling system is provided with a cooling air inlet pipe and a drying air inlet pipe, and steam heat exchangers and automatic doors capable of controllingtemperature and air volume are mounted on the pipes respectively. Compared with the conventional counter-flow type pellet feed cooler, the drying and cooling system has the advantages that penetrating power of cooling air is strong, the cooling air can be contacted uniformly with the powdery feed, and the cooling efficiency is increased greatly; the powdery feed on each layer can play a filter role, so that powder return rate is reduced; the system has integrated cooling and drying function and is applicable to all weather conditions.

The invention relates to the technical field of optical devices, and particularly provides a near-infrared optical filter, a preparation method thereof and optical filtering equipment. The near-infrared optical filter provided by the invention comprises a glass substrate and an optical filtering layer arranged on the surface of one side of the glass substrate, wherein the optical filtering layer comprises SiO2 film layers and SiH film layers which are alternately arranged in sequence, the SiO2 film layers are in contact with the glass substrate, a sum of the number of the SiO2 film layers andthe number of the SiH film layers ranges from 20 to 40, and the thickness of the optical filtering layer ranges from 3000 to 4500 nm. According to the near-infrared optical filter, the SiH film layersare high-refractive-index thin films, the SiO2 film layers are low-refractive-index thin films, and the optical filter layer obtained by alternately stacking the two thin films is used for preparingthe near-infrared optical filter, so that the near-infrared optical filter plays an effective optical filtering role. The preparation method of the near-infrared optical filter provided by the invention is simple to operate and low in cost, does not require special equipment and process conditions and is suitable for industrial and automatic production.

The invention relates to a porous hollow tubular composite membrane and a preparation method and application thereof. The composite membrane is formed by combining a porous hollow tubular carrier and an adsorption particle gathering layer which is arranged on the outer surface of the porous hollow tubular carrier in a wrapping mode, the adsorption particle gathering layer is a porous-membrane-shaped adsorption particle gathering layer, and the thickness of the adsorption particle gathering layer is 5-50 mm; in the preparation process, the porous hollow tubular carrier is immersed in a chitosan solution containing adsorption particle powder, the adsorption particle powder is arranged on the outer surface of the porous hollow tubular carrier in a wrapping mode, then the porous hollow tubular carrier is suspended and dried, and the porous hollow tubular composite membrane can be obtained. In the application process, the porous hollow tubular composite membrane is assembled into a tube-shell type adsorption device and used for conducting defluorination on drinking water. Compared with the prior art, the porous hollow tubular composite membrane is high in adsorption rate, large in adsorption volume, large in sectional area of a work bed layer when being used for defluorination and capable of being applied to a household minitype defluorination device for drinking water.

The invention discloses an adjustable photoelectric double-pulse laser-induced breakdown spectrometer which comprises a clamping plate, a moving platform, a moving concentric-square-shaped sliding block, a linear sliding rail, a detection cylinder, a focusing lens, a machine shell, a detection pipe, a pulse laser, an electronic computer, a monochromator, a data acquisition unit, a position-adjustable supporting frame structure, a cooling fan structure capable of dissipating heat and a sample collecting and filtering tank structure. The clamping plates are transversely connected to the upper portion and the lower portion of the left side of the movable platform through bolts. The moving platform is longitudinally connected to the inner side between the moving concentric-square-shaped sliding blocks through bolts. Through the arrangement of the movable seat, the movable shaft, the flat head lining rod, the supporting bottom frame, the connecting seat and the electric push rod, position adjustment according to detection requirements is facilitated, and the detection operation requirements are met.

The invention relates to the technical field of agricultural farming, in particular to an agricultural farming device that is convenient for sowing and fertilizing, including a device main body, a connecting mechanism, a feeding mechanism, a material discharging mechanism, a movable mechanism, a pedal and a decomposition mechanism; Separation is convenient for spreading seeds and fertilizers at the same time. At the same time, there are corresponding adjustment devices inside the main body of the device, which is convenient for adjusting the outlets of seeds and fertilizers, so as to adapt to the sowing of different crops; the movable mechanism is set on the device. The bottom of the main body and the discharge mechanism, through the filter mesh structure and the corresponding cam structure, it is convenient to sieve the seeds and fertilizers, and at the same time avoid the blockage of seeds and fertilizers; the decomposition mechanism is placed on the main body of the device. The inside of the side, through the gear transmission structure, can squeeze and crush the applied fertilizer, which can not only prevent the fertilizer from being blocked when it is discharged, but also avoid the burning of seedlings caused by excessive fertilizer particles.

The invention provides a camera module and an electronic device, and belongs to the technical field of electronic device. When the electronic device with the camera module is adopted to obtain the characteristic of having the filter effect, the operation burden of software in the electronic device is not increased, and the smooth use of the equipment is ensured. The camera module comprises a colorchanging piece, a lens and an image sensor which are arranged in the incident direction of light. The color changing piece covers the lens and comprises a first transparent state with a first color and a second transparent state with a second color. When the camera module is started, the color changing part is in the first transparent state or the second transparent state, and the lens acquires an image and images on the image sensor.

The invention relates to the technical field of seasoning batching, in particular to a batching device for health-preserving chicken soup composite edible seasoning and a batching method. The batching device comprises an equipment main body, wherein the equipment main body is provided with a stirring mechanism capable of fully and uniformly mixing the seasoning, the equipment main body is provided with a discharging mechanism, the equipment main body is fixedly connected with a support, the equipment main body is provided with a batching mechanism facilitating batching of various raw materials, the batching mechanism is internally provided with a mixing mechanism and a screening and filtering mechanism, and the equipment main body is provided with a sampling mechanism facilitating sampling work; the stirring mechanism is arranged on the equipment main body, so that the interaction degree of materials in different depths is improved through the stirring mechanism, the stirring uniformity is improved, and the proportioning stirring of the seasoning can be conveniently and better realized; and through cooperation of the batching mechanism and the stirring mechanism, corresponding auxiliary materials can be uniformly added while the main materials are stirred, so that the auxiliary material stirring and proportioning effect of the seasoning can be improved.

The invention relates to the technical field of drainage, in particular to an anti-blocking water-permeable passage. The anti-blocking water-permeable passage comprises a face brick layer, a water-permeable layer, a water storage layer and a base layer which are sequentially arranged from top to bottom, wherein the face brick layer comprises solid pavement bricks which are continuously spliced andwater-permeable channels which are arranged on the solid pavement bricks; each pavement brick is provided with one water-permeable channel, and the water-permeable channels vertically run through thepavement bricks; the water-permeable layer is made of water-permeable concrete with the same aggregate grade and the porosity of about 20%; the water storage layer is formed by compacting graded broken stone particles. Filter bags capable of being replaced in time and capable of filling the whole water-permeable channels are utilized, the problem that an existing water-permeable layer is blockedand a whole pavement needs to be finished is solved, the construction cost is reduced, construction is facilitated, the service life of the pavement is prolonged, and the water seepage efficiency of the pavement is improved.

The invention discloses a lens reflectivity measuring method and device. The method comprises the following steps: putting a to-be-detected composition which is at least composed of a plating accompanying sheet, plate glass and refractive index matching liquid positioned between the plate glass and the plating accompanying sheet into a light path of a spectrophotometer to make incident light emitted by a light source of the spectrophotometer received by a receiver of the spectrophotometer after the incident light is reflected and refracted by the to-be-detected composition; turning on the light source of the spectrophotometer, wherein the incident light emitted by the light source is reflected and refracted by the to-be-detected composition to form emergent light, and the emergent light received by the receiver comprises three paths of light; and measuring light intensity of the emergent light received by the receiver, measuring light intensity of the incident light emitted by the light source, and calculating the ratio of the light intensity value of the emergent light to the light intensity value of the incident light, so that the reflectivity of the plating accompanying sheet isobtained. The device realizes accurate measurement of the reflectivity of the lens, is high in precision, simple in structure and convenient to operate.

The invention provides a picture display method and device and a computer storage medium, and the method comprises the steps: obtaining a first picture corresponding to at least one target picture in media content, and the cutting position information of the first picture; cutting the first picture according to the cutting position information to obtain a cut second picture; displaying a second picture in the media content; and in response to a trigger event for the second picture, switching from displaying the second picture to displaying the first picture. In the embodiment of the invention, the server issues the clipping position information of the first picture while issuing the first picture, so that the client can clip the first picture according to the clipping position information to obtain the clipped second picture, namely the thumbnail, and the server has the capability of judging key contents in the picture, so the thumbnail capable of reflecting the key content of the complete picture can be obtained through the mode, and meanwhile server processing resources can be saved.

The invention provides an electromechanical equipment static electricity and dust removal device. The electromechanical equipment static electricity and dust removal device comprises a rack, a vertical base, a control switch, supporting legs, movable trundles, a connecting lining base, a fixing nut, a supporting screw, a hand wheel, a supporting base and an anti-skid pad. According to the electromechanical equipment static electricity and dust removal device, the connecting base, a high-voltage generator, an ion air gun, a fixing sleeve, an adjusting rod, an adjusting bolt and a static electricity elimination contact block are arranged, so that static electricity generated by electromechanical equipment can be eliminated; according to the size or the installation position of the electromechanical equipment, the adjusting bolt can be loosened, the distance between the fixing sleeve and the adjusting rod is adjusted, so that the static electricity elimination contact block is in contactwith the surface of the electromechanical equipment, and then the adjusting bolt is locked; and if the electromechanical equipment generates static electricity, the static electricity can be guided out; and meanwhile, the ion air gun is controlled to act through the high-voltage generator, ion air can be generated, dust on the surface of the electromechanical equipment can be blown, and meanwhile,the static electricity is removed so as to ensure the working stability of the electromechanical equipment.

The invention discloses a new energy sludge drier. The new energy sludge drier comprises a crushing box and a drying box. The middle of the top of the crushing box is provided with a sludge discharging pipe. One end, away from the crushing box, of the sludge discharging pipe is connected to an output end of a sludge pump. A sludge pumping end of the sludge pump is provided with a sludge pumping pipe, and a funnel is installed above the interior of the crushing box. The new energy sludge drier is provided with a conveying box which can effectively convey the sludge, and the interior of the conveying box is provided with a conveying belt which has a function of a filter screen. Sewage in the sludge is filtered in a conveying process, and because the new energy sludge drier is provided with awater pump, and the water pumping end of the water pump is connected to the bottom of the conveying box, the sewage positioned in the bottom of the conveying box is pumped out, and preliminary filtering is performed by a metal filter screen installed in a sewage treatment cylinder.

The invention relates to the field of health drink. In order to solve the problem that recovery of the water temperature takes a long time in an extracting step in the conventional honeysuckle-flavored beer brewing process, the invention provides a brewing method of honeysuckle-flavored beer. The brewing method comprises the following steps: selecting a raw material, extracting, clarifying and stabilizing, blending and packaging, wherein the extracting step comprises the following substeps: adding honeysuckle into an extracting tank, adding hot water, and starting a heater of the extracting tank for heating; starting a temperature control system of the extracting tank, when a main controller of the temperature control system detects that the water temperature is higher than 85 DEG C, increasing the rotation speed of a stirring blade, while when the main controller detects that the water temperature is close to 85 DEG C, reducing the rotation speed of the stirring blade, and during the moment, performing heating operation of the heater all the time; rotating telescopic heat-dissipating plates hinged to the two sides of the upper part of the extracting tank, wherein the rotated heat-dissipating plates scrape off honeysuckle on the stirring blade; and opening a water outlet in one side of the extracting tank to discharge a honeysuckle extract.

The invention discloses a method for manufacturing a dustproof photography module. The method comprises the following steps of: (1) manufacturing a lens, a light sensing chip and a planar printed circuit substrate; (2) manufacturing a hollow sealing layer with a thickness; and (3) manufacturing a light transmittance protection layer by a transparent material with a thickness, and arranging the light transmittance protection layer on the upper surface of the sealing layer, wherein the light transmittance protection layer completely covers the sealing layer; and an imaging protection region of which the perpendicular height is not less than 0.65 millimeters is formed between the position over the light sensing region of the light sensing chip and the upper surface of the light transmittance protection layer. The invention also discloses a device for implementing the method. The method and the device have the advantages that the sealing layer and the protection layer are arranged on the light sensing chip, so that an imaging distance is increased, and an image can be formed until the thickness of dust falling on the protection layer is more than 30 mu m; and the problem about dust prevention of the photography module is effectively solved.

A liquid leading pump beam method and device belongs to field of optics and laser photoelectron technique. It includes pumping light source, optical coupling device, liquid leading device and fiber. Thereinto: the optical coupling device receives the pumping light omitted by the pumping light source; liquid nozzle, the pumping beam coupled by the optical coupling device is coupled with liquid column spurted by the liquid nozzle; the central line of cooling fluid collector is aimed at the central line of the liquid nozzle; return flexible hose and liquid-in end are connected with the cooling fluid collector; radiator and circlulating pump are in series, the liquid-in port of the radiator and the liquid-out port of the return flexible hose are connected, the output end of the circlulating pump is connected with the lower end of the liquid nozzle; the liquid nozzle, the cooling fluid collector, the return flexible hose, the radiator and the circlulating pump are in series to form a liquid leading device. The invention resolves the high power pumping problem in solid laser and fiber laser, and the output power of laser can be increased, stability and reliability of laser system can be guaranteed.

The invention provides a refrigerating system and a refrigerator. The refrigerating system comprises a compressor, a condenser, a throttling device and an evaporator which are connected through a pipeline to form a circulation loop, and further comprises a pressure adjusting device which is connected into the circulation loop, located between the condenser and the throttling device and configured to be in a conduction state allowing a refrigerant to pass through when the refrigerating system operates; and after the refrigerating system is shut down, the blocking state is switched to prevent the high-pressure refrigerant on the condenser side from flowing to the throttling device. The refrigerating system can quickly enter a refrigerating state after being started.

The invention relates to a passive filter for realizing solid liquid gas phase separation. The passive filter is characterized in that a main body part of the passive filter mainly comprises a phase separation part of a basket-shaped filter screen the opening of which is upward, a liquid phase collection cavity, a receiving tank, a gas phase outlet, a condenser and a liquor condensate collection cavity, and the passive filter combines with some valves, a rapid joint and a flexible pipe auxiliary part. The passive filter can realize the solid liquid gas phase separation effect through a reasonable structural design under the condition that an active part is not deployed.

The invention relates to the technical field of corn processing, in particular to corn threshing processing equipment. The equipment comprises an equipment body, a supporting mechanism, a feeding mechanism, a dredging mechanism, a threshing mechanism and a discharging mechanism. When the equipment is used, the threshing mechanism is arranged in the equipment body, and corns entering the equipmentbody can be conveniently and automatically threshed through the driving of a motor and a corresponding gear chain transmission assembly, so that the manual operation is avoided, the injury to human hands is reduced, and meanwhile, the working efficiency is improved; and the discharging mechanism is arranged in the equipment body, through a corresponding screening and filtering assembly and the transmission assembly similar to a cam, primarily husked corn kernels can be screened and filtered conveniently, the situation that impurities such as corncobs and corn leaves are doped in the obtained corn kernels is avoided, the product quality is guaranteed, meanwhile, secondary machining is avoided, and the working efficiency is further improved.

The invention discloses a bypass valve of an engine oil filter. The bypass valve comprises an end cover, a sealing pad, a gasket, a spring, a valve body with a circular tube structure and a pressure adjusting unit, wherein the end cover is riveted with the valve body, the sealing pad is arranged at the bottom of the valve body, the gasket is arranged at the top of the sealing pad, the spring is arranged at the top of the gasket, the bottom of the pressure adjusting unit is attached to the spring in a pressure mode, moreover, the periphery of the pressure adjusting unit is pressed and fixed tothe inner periphery of the valve body, the diameter of the sealing pad is larger than that of an oil inlet of the end cover, and oil outlet mechanisms are further uniformly arranged on the valve body.Aiming at the technical problems that the pressure of an existing bypass valve is not adjustable, and the pressure tolerance is large after machining, improvement is made; and the bypass valve of theengine oil filter has the advantages that the opening pressure is adjustable, filtering is achieved, the service life is long, and the precision is high.