569results about How to "Improve filtering effect" patented technology

The invention relates to a capsule endoscope layout capable of achieving a small-format, wide-angle, wide light-distribution arrangement with limited variations. A capsule endoscope 1 comprises an objective lens 4, a transparent dome 2 to cover the object side of the objective lens, and light emitter devices located around the outer periphery of the objective lens. The endoscope 1 further comprises an integral-piece holder member 30 adapted to hold the objective lens 4 in place and hold the light emitter devices 5 at a position set back from an end of, and around, the objective lens 4 while the light emitter devices 5 are inclined outward at an angle with a center axis of said objective lens 4.

The invention discloses a preparation method of a porous network structure fiber membrane of nano cellulose/silicon dioxide. The preparation method is characterized by comprising the following concrete steps: coating prepared cellulose nanocrystal of which the diameter is 3-10nm on the surface of an inorganic silicon dioxide nano-fiber membrane to form a network structure after modifying the cellulose nanocrystal by a surfactant, thereby the mechanical property, the filtering property and the like of the inorganic silicon dioxide fiber membrane are improved due to strong hydrogen-bond action of the cellulose. The finally obtained filter membrane has the advantages of being simple in structure, good in mechanical strength, good in filtering effect, low in cost and the like, and the preparation method has wide application prospect in the fields such as air filtering, catalysis, organisms, pharmacy, drinking water purification, textile-dyeing wastewater treatment, and PVA (polyvinyl alcohol) size recovery.

The invention discloses a filter and a laser printing manufacturing method and application thereof. By the adoption of a laser printing method, the structure of the filter is not limited by technological conditions any more, filters of any structures can be manufactured, and filters with complicated curved surfaces and complicated pores can be directly manufactured. Because the laser printing method is used for manufacturing, the number of filtering layers of the filter will not be limited, and filtering pores in the filtering layers can be designed to be gradient holes; polluted fuel is in contact with the inner filtering layer firstly; large pollutants are intercepted by large filtering pores, and small pollutants are intercepted by small filtering pores; the intercepted pollutants slide to the lower end along the filtering pores, so that layered filtering is achieved; in this way, the filtering effect is improved, and the filtering pores are prevented from being blocked; and the service life of a filtering element is greatly prolonged, and the filter manufactured according to the laser printing manufacturing method can be designed at will according to actual requirements to meet use requirements.

The invention relates to screening equipment, and particularly relates to mechanical soybean screening equipment. The technical aim to be achieved by the invention is to provide the mechanical soybeanscreening equipment which is high in screening efficiency and capable of completely removing gravels and foreign materials. The mechanical soybean screening equipment provided by the invention comprises a box body and the like; the middle of the top of the box body is connected with a discharging hopper; the middle of the internal top of the box body is connected with a discharging cylinder in anembedding manner; the discharging hopper communicates with the discharging cylinder; the upper part of the left side of the box body is provided with a first opening; the middle part of the left sideinside the box body is connected with a horizontal plate; the front and rear sides of the horizontal plate are correspondingly connected with the internal front and rear sides of the box body; and the right side of the top of the horizontal plate is connected with a vertical plate. According to the mechanical soybean screening equipment provided by the invention, a discharging device is used fordriving soybeans to intermittently drop on a screening device, thus small-particle soybeans and gravels are removed by the screening device, and an air blowing device is used for blowing away relatively light impurities, so the screening effect is improved, and the effects that the screening efficiency is high and the gravels and the foreign materials are removed completely are realized.

The invention provides a gas filter device, belonging to environmentally-friendly facility. The device comprises an air inlet pipe, a gas extraction filter device, an absorption liquid circulating and draining device, an absorption liquid level control device and an electric appliance control and display device, wherein one end of the air inlet pipe extends into the middle part in a gas filter tank of the gas extraction and filter device, and extends upwards out of the surface of the absorption liquid; the gas extraction filter device is connected with the absorption liquid circulating and draining device and the absorption liquid level control device; the gas extraction and filter device comprises a wet filter tank, a dry type filter cylinder, a draught fan and a muffler; a solid-state substance settlement plate, an impact cap, a diversion angle and a filter plate are arranged in the wet-type filter tank; and the dry type filter cylinder, the draught fan and the muffler are arranged in a gas exhaust cylinder on the upper part of the wet filter tank in sequence. The gas filter device achieves the aim of waste gas filter by the technology of wet and dry double filtration.

The group of useful inventions concerns the field of medical technology, more specially to surgical instruments for catching of thromoemboli and to devices for their transport to an installation site. The a set for preventive maintenance of a thromboembolism of a pulmonary artery comprises a filter and a mounting device for its installation and extraction. In the mounting device for the installment of the filter the pusher (3) is provided with a movement limiting stop (4), and its working block is made in the form of a capsule (5) with an axially movable therein clamping cartridge (6) and a mechanism for its movement. The working block (10) of the extractor device is made in the form of a casing (13) with an aperture and a loop extending therefrom in perpendicular direction to the axis of the extractor. In the filter, the free ends (19, 20) of the fixing and centering elements are bent outwards. The threads (23) of both elements have an identical radius of bend at the end (18). The free ends (20) of the centering element have blunted ends and are made in the form of a circular-arch segment preventing the blunted ends of the fully unfolded centering legs from touching the walls of the vena cava and being directed to the centre of the lumen of the vein. The free ends (19) of the fixing element (17) are provided with protective areas (20) located between the conical part and the bent outwards fastener part and in parallel to the axis of the vein.

The invention discloses an omnidirectional filtering device for a washing machine. The device comprises a filtering cover and a line scrap filter which is embedded into the filtering cover, wherein the line scrap filter comprises a box-type front cover and a rear cover; a transverse bar is arranged in the middle of the front cover and divides a filtering cavity of the line scrap filter into an upper filtering cavity and a lower filtering cavity; and water inlets of the filtering device are formed on left and right side walls of the upper filtering cavity and at the bottom of the lower filtering cavity. Omnidirectional water inlet and omnidirectional filtration are realized through the water inlets on two left and right sides of the upper filtering cavity and at the bottom of the lower filtering cavity. Results show that the line scrap collection rate of the omnidirectional filtering device for the washing machine reaches 80 to 90 percent. The omnidirectional filtering device is simple in structure, low in cost and good in filtering effect, and is a line scrap collecting device worthy of popularization and application.

The invention relates to gas filter foam with graphene oxide, composed of filter foam that contains graphene oxide. Also provided is a preparation method of the gas filter foam, comprising the steps of preparing graphene oxide solution, to be specific, preparing graphite oxide by using chemical oxidization, washing to neutrality, and ultrasonically stripping to obtain graphene oxide dispersion; soaking filter foam, to be specific, soaking filter foam in the graphene oxide dispersion which at least submerges the filter foam; freezing, to be specific, placing the filter foam in a freezing chamber of a freezing dryer so that the filter foam condenses into solid; drying, to be specific, evacuating the filter foam obtained, keeping low temperature so that a solvent sublimates to obtain the gas filter foam with graphene oxide. The filter foam of the invention is capable of oxidizing toxic gas in air and purifying the air, with specific surface area increased and adsorbing capacity improved, and is capable of adsorbing fine particulate matters in air, such as PM2.5.

The invention relates to a method for preparing spherical yttria with large granularity and large specific surface area, in particular to a method for preparing the spherical yttria with large granularity and large specific surface area by an yttric inorganic salt solution through an ammonium hydrogen carbonate precipitation method. The preparation method comprises the following steps: the yttric inorganic salt solution and the ammonium hydrogen carbonate aqueous solution directly react to generate a serous fluid containing yttrium carbonate; and subsequently, the serous fluid is added with soluble ammonium salt and is kept stand, matured, filtered, washed and calcined to manufacture the controllable spherical yttria with the granularity D50 of between 20 and 100 mu m and the specific surface area of between 10 and 100 m<2>/g. The soluble ammonium salt is added to reach the aims of regulating and controlling the size of the granularity and the specific surface area of an yttria powder body. An yttria product with large granularity and large specific surface area simultaneously is obtained by the method; sediment has large granularity; the serous fluid has good filtering performance, thereby being easy for industrialized operation; and the whole process is simple and is not limited by special equipment.

The application discloses a website-filtering method and system based on a mobile Internet and cloud computing. The method includes: acquiring a data packet, which requests access of the mobile Internet, sent out by a mobile terminal; analyzing out a website to be accessed from the data packet; comparing the website to be accessed with websites stored in a local website database of the mobile terminal and if information of the website to be accessed does not exist and content affirmation of a webpage corresponding to the website to be accessed is evaluated to be unsafe by a user, sending the evaluation to a monitoring server; the monitoring server storing a corresponding relation of the website to be accessed and the evaluation into a cloud-end website database in the monitoring server; and at the same time, updating the local website database and the cloud-end website database at a set time. The scheme of the application is capable of integrating website access rules set by different users and sharing the rules to a local website database of each mobile terminal so that offensive websites can be filtered and intercepted timely and comprehensively.

A container module ecological cycle aquaculture system comprises a culture unit, a bio-filter unit and a physical filter unit. The water level of the culture unit is kept higher than that of the physical filter unit. The container module ecological cycle aquaculture system further comprises a first straight water pipe, a second straight water pipe, a third longitudinal water pipe, and an aerator; the bottom of the culture unit is communicated with the bottom of the physical filter unit through the first straight water pipe, water in the culture unit automatically flows to the physical filter unit through the first straight water pipe according to the principle that liquid levels in communicated devices with the bottoms communicated are equal; the upper portion of the physical filter unit is communicated with the upper portion of the bio-filter unit through the second straight water pipe; water in the physical filter unit overflows to the bio-filter unit through the second straight water pipe; the bottom of the third longitudinal water pipe is communicated with the bottom of the bio-filter unit, and the top of the third longitudinal water pipe is communicated with the upper portion of the culture unit; water in the bio-filter unit is automatically guided to the third longitudinal water pipe according to the principle that the liquid levels in communicated devices with the bottoms communicated are equal; the aerator is disposed on the third longitudinal water pipe so that water in the upper portion of the third longitudinal water pipe and bubbles created by aerating overflow to the culture unit.

The invention relates to a filtering device, in particular to a high-efficiency filtering device for petroleum. The technical problem to be solved by the present invention is to provide a high-efficiency oil filtering device with good filtering effect, convenient use, no blockage, resource saving and environmental protection. In order to solve the above technical problems, the present invention provides such a high-efficiency oil filtration device, which includes a bottom plate, an n-type bracket, an impurity collection frame, an oil collection frame, a first support rod, an oil collection box, a discharge pipe, a valve, a lower Hopper, first filter device, etc.; the top of the bottom plate is provided with an n-type bracket, and the left and right sides of the top of the bottom plate are respectively placed with an impurity collection frame and an oil collection frame. The invention filters the petroleum through the first filtering device and the second filtering device, and when the filtering is completed and needs to be used, the filtered petroleum is stirred and mixed by the first stirring device and the second stirring device.

The invention relates to a molten metal filtering device. The molten metal filtering device comprises a liquid inlet bin, a liquid outlet bin and multiple filters, wherein the liquid inlet bin is located on the upper portion of the filtering device and provided with a liquid inlet, and the liquid inlet is formed in the wall of the liquid inlet bin; the liquid outlet bin is located on the lower portion of the filtering device and provided with a liquid outlet; the multiple filters are arranged between the liquid inlet bin and the liquid outlet bin in parallel. The molten metal filtering device is suitable for casting of heavy castings and easy to manufacture.

The invention provides a waste gas treatment and heat energy recycling device for a heat-setting machine, comprising a baking oven, a hot-air pipe, a draught fan and a high-temperature purifier which are arranged in an oven, wherein, the hot-air pipe is positioned on the upper part of the baking oven and is provided with an air inlet end; the draught fan is provided with an air draft side and an exhaust end; an air channel is formed between the air inlet end of the hot-air pipe and the exhaust end of the draught fan; an air-collecting box is arranged between an air draft end of the draught fan and the high-temperature purifier; a waste gas heat recycling pipe is arranged in the baking oven and above a heat-setting pipe; and the waste gas heat recycling pipe and the high-temperature purifier are connected through an induced waste gas connection tube. The invention ensures that set waste gas can realize centralized recycling and quick conveying through adding the waste gas heat recycling pipe and the induced waste gas connection tube, and has no waste gas exhausted outside the heat-setting machine. The device does not occupy peripheral space of the heat-setting machine, so the device has the advantages of high efficiency and energy conservation, environmental protection and small occupied space of the baking oven.

A windshield device provided at a front part of a vehicle body of a saddle ride type vehicle includes an air introduction port provided at a front part of the windshield device and opened toward the front side of the vehicle body. An air blow-off port is provided at an upper part of the windshield device and is opened toward the upper side. An air duct establishing communication between the air introduction port and the air blow-off port through an air passage extends rearwardly upwards. A straightening vane extends sideways in the air passage and is inclined rearwardly upwards so as to be along the air passage. In side view of the vehicle, a first straight line connecting both ends of the straightening vane is disposed at an obtuse angle in relation to a second straight line that is orthogonal to a steering axis and extends to a grounding point of a rear wheel.

The invention discloses a novel stop band gap ultra wide band antenna, wherein the antenna comprises a polygan gap antenna and a combined trap wave structure, namely, a combined trap wave is generated by opening a C-shaped gap on the T-shaped micro-strip feeder which serves as a feed unit and adding micro-strip wires in the polygan gap. The polygan gap antenna can generate ultra wide band characteristics and adopts a double frequency resonance oscillation trap wave structure similar to a second order filter to realize narrower stop band. Compared with the prior art, the stop band ultra wide band antenna can realize good filtering characteristics and has the advantages of small size and low cost.

The invention provides an ultra-fine glass fiber coated substrate and a preparation method thereof. The preparation method comprises the following steps of: cleaning a glass fiber raw material after being inspected, and carrying out high-temperature melting and fiber drawing to obtain an ultra-fine glass fiber yarn; allowing the ultra-fine glass fiber yarn to be subjected to unwinding, doubling and twisting, bulk treating, warping, weaving and other processes to obtain ultra-fine glass fiber bulked cloth; allowing the ultra-fine glass fiber bulked cloth to be subjected to thermal cleaning treatment and impregnation treatment; and finally, allowing the material to be sequentially subjected to volatilization, drying, sintering and hot rolling setting treatment. The ultra-fine glass fiber coated substrate obtained by the method has the advantages that the temperature resistance, corrosion resistance, filter effects and the like are significantly improved, the production cost is lower, the service life is long, the requirements of the coating process can be fully met, and the ultra-fine glass fiber coated substrate is novel filter material with excellent price-performance ratio.

Surface-oxygenated biochar compositions and sonication-ozonization methods create advanced hydrophilic biochar materials having higher cation exchange capacity, optimized pH, improved wettability, and toxin free components. These sonicated and ozonized biochar compositions are used as filtration materials for clean water and air, as phosphorus solubilizing reagents to mix with phosphate rock materials to make a slow-releasing phosphate fertilizer, as biochar soil additives to help solubilize phosphorus and reduce phosphorus fertilizer additions required to achieve desired soil phosphorus activity, crop uptake, and yield goals, as sand soilization reagents by utilizing their liquid gel-forming activity in the spaces among sand particles to retain water and nutrients and hold the sand particles together, as plant growth stimulants by using the humic acids-like surface-oxygenated biochar substances at a proper ppm concentration and as carbon sequestration agents to help control climate change for energy and environmental sustainability on Earth.

A synthesiser to generate sounds often in a musical environment but also in a speech environment. Such synthesis of sounds is often accompanied by at least one mode of filtering or many modes. Hitherto, the application of such filtering has involved a control for each filter. This may be by way of a lever, toggle or rotatable knob. Thus, a user when applying the filters is required to adjust each control independently of the other. This enhances the complexity and a large amount of skill is involved in accurately selecting the required amount and types of filtering.

Thus, the present invention is directed towards a user interface for controlling the filtering of a signal input (such as a sound), said user interface comprising a rotatable controller having two or more sectors, each sector of said controller corresponding to a respective filter, whereby in use said controller is rotated to align said sectors with respect to said signal input thereby controlling the application of the filters to the signal input.

The invention belongs to the technical field of waste gas processing devices, and particularly relates to a plasma waste gas processing device which comprises a base. The four corners of the top of the base are each fixedly provided with a box body. The inner wall of the bottom of each box body is fixedly provided with a first spring. The top end of each first spring is fixedly provided with a supporting plate. Vertical rods are symmetrically fixed to the inner wall of the bottom of each box body. The supporting plates are slidingly connected to the outer side walls of the vertical rods. Transverse rods are fixed to the inner walls of the two sides of each box body respectively. A fixed plate is fixed to one end of each transverse rod. A slide plate is slidingly connected with the outer side wall of each transverse rod. A second spring sleeves the outside of each transverse rod. By arranging partition plates in a shell, dividing the shell into a first chamber and a second chamber and arranging a filtering mesh plate in the first chamber, when waste gas passes through the first chamber, large-particle-size dust in the waste gas can be left, and therefore the subsequent purifying effect can be conveniently improved.

The embodiment of the invention discloses a picture identification method and device, computer equipment and a medium. The method comprises the following steps of: inputting the first picture uploadedby the user into a de-interference auto-encoder for preprocessing so as to filter interference in a first picture and output a second picture, wherein the de-interference auto-encoder is obtained bytraining at least two types of interference sample sets, and disturbance modes added in the different types of interference sample sets comprise at least two of noise, affine change, filtering fuzzification, brightness change and monochromization; And inputting the second picture into a picture yellowing identification model for identification. According to the embodiment of the invention, the pre-trained anti-interference auto-encoder is used for carrying out anti-interference preprocessing on the picture uploaded by the user, so that the problem that the filth picture is successfully uploaded to a network through the identification of a picture yellowing model by using an anti-sample technology is solved; Pictures processed by an adversarial sample technology can be identified, the filtering capability of the adversarial samples is improved, and the network environment is purified.

The embodiment of the invention provides a digital filtering method for underground instrument signal transmission. The method comprises the following steps of: acquiring data needing digital filtering; removing sharp pulse noise from a waveform through an amplitude-limiting average filtering method; and removing waveforms lower than and higher than the signal frequency through a band-pass filtering method by using a digital filter algorithm. The digital filtering method can improve the accuracy of mud pulse signal filtering, and can adjust the filtering parameters according to signal types so as to improve the filtering effect on the underground instrument signal transmission.

The invention relates to the technical field of filters, and particularly relates to a gas filter. The gas filter comprises a barrel and a filer element, wherein the filter element is arranged in the barrel. The gas filter is characterized in that a gas inlet pipe is arranged at the upper part of the barrel along the tangent direction of the barrel; a gas outlet pipe is arranged on the side edge of the bottom of the barrel; the filter element is arranged in the part, between the gas inlet pipe and the gas outlet pipe, in the barrel by virtue of a filter element frame; and rotary baffle plates which are arranged downwards in a spiral manner are obliquely arranged on the inner wall of the barrel, corresponding to the filter element. The gas filter is simple in structure; the filter element is convenient to change; the gas filtering effect is good; and moisture can be separated out.

The invention relates to the technical field of cooling liquid, in particular to a cooling liquid treatment device for machining. The cooling liquid treatment device aims to solve the technical problem that the cooling liquid filtering effect is influenced due to the fact that a filter screen is blocked by metal debris in cooling liquid. In order to solve the technical problem, the invention provides the cooling liquid treatment device for machining. The cooling liquid treatment device comprises a machine body, a driving device is fixedly connected to one side of the top of the machine body, astrip-shaped groove is formed in the other side of the top of the machine body, a moving device is arranged in the strip-shaped groove, the top of the moving device is movably connected to one end ofthe driving device, a first supporting plate is fixedly connected to one side of the inner wall of the machine body, a second supporting plate is fixedly connected to the other side of the inner wallof the machine body, and a filtering device is fixedly connected to the top of the first supporting plate and the top of the second supporting plate. According to the cooling liquid treatment device,the phenomenon that the filter screen is blocked by the excessive metal debris can be effectively avoided, and the filtering effect of the cooling liquid can be improved.

The invention discloses a WIFI circuit capable of improving filtering performance and a method thereof. The circuit comprises a wireless transceiver, a power amplifier, a lowpass filter, a transceiving switcher, a low-noise amplifier and an antenna. An adjustable bandpass filter is respectively arranged between the wireless transceiver and the power amplifier, and between the transceiving switcher and the low-noise amplifier. The control end of the adjustable bandpass filter is connected with the wireless transceiver, so that a signal filtering bandpass range is changed to adapt to a bandwidth range of a current signal, under the control of the wireless transceiver. According to the circuit and the method, the wireless transceiving out-of-band interference can be reduced, and the communication quality and speed of the wireless WIFI can be improved.

The invention relates to para-aramid fine denier fiber and a preparation method thereof. The method comprises the following steps: dissolving a para-aramid polymer in a strong acid, filtering twice, defoaming, performing tertiary filtration, spinning, stretching, cooling to solidify, rinsing, drying and rolling to finally prepare the finished fiber. In the preparation method, a high shear double screw extruder and a continuous film defoaming device are adopted, multiple filtering working procedures are adopted, the filtering precision characterized by the filtering plugging value Kw which is no more than 150, the defoaming purity, the spinning temperature, the stretching condition and the like are strictly controlled, the global optimization of process steps and process conditions is performed, the method is practical and is high in operability, and the para-aramid fine denier fiber with good physical properties can be prepared. The para-aramid fine denier fiber has the advantages of high strength and good quality, the fineness is 30-100D, the tensile strength is no less than 22CN/dtex, the elongation at break is no less than 2.5% and the initial modulus is no less than 550CN/dtex.

There is provided a granular-bed filter for cleaning a gas containing fine particulate matter (“dust”). A multiplicity of vertically disposed filter trays are assembled to form a “panel.” In each filter tray, an inclined porous plate supports a bed of granular material. Each bed presents an inclined gas-entry face that receives gas from a vertically-disposed dusty-gas-distribution compartment nearby the face's lower edge. A filter cake forms upon the gas-entry face. Preferably, the bed's depth is substantially the same at its upper and lower edges. Cleaned gas leaves a tray across the porous plate and flows into a vertically-disposed cleaned-gas-collection compartment. After an interval of filtration, gas-entry faces are renewed by producing en masse displacement of the material respecting the supporting plates, the displacement producing a spill of a surface layer from each gas-entry face. The displacement is preferably accomplished by causing the support plates to move sharply upward (e.g., as may be caused by an upward blow of a hammer). The displacement may also be caused by subjecting the panel to a reverse transient surge flow of gas (i.e., a “puff-back”). After face renewal, granular material descends by gravity from an elevated source to make good loss of the material from the faces.

The invention discloses a live working activated carbon air conditioner filter element for a special car. The filter element comprises a coarse filter screen. An upper fixed frame, a middle fixed frame and a lower fixed frame which are same in specification are successively arranged on one side of the coarse filter screen; locking bolts are arranged at four corners on one side, far from the upper fixed frame, of the coarse filter screen; locking openings corresponding to the locking bolts are formed in the coarse filter screen, the upper fixed frame, the middle fixed frame and the lower fixed frame; a first mounting plate is arranged between the upper fixed frame and the middle fixed frame; a plurality of cellular receiving grooves are formed in one side, close to the upper fixed frame, of the first mounting plate; activated carbon fills the cellular receiving grooves; vent holes are formed in the bottom of the cellular receiving grooves; first clamping rings are fixed on the upper fixed frame and the middle fixed frame; and one side, close to the first mounting plate, of each of the first clamping rings is hermetically connected to the first mounting plate through first sealing cotton. The filter element disclosed by the invention is simple in structure, convenient to use and good in filter effect. Assemblies of filter layers are convenient to detach and replaced, so that the using cost is lowered.

The invention discloses a raw material crushing device for intelligent automobile manufacturing. The device comprises a crushing box, wherein the top of the crushing box is provided with a feeding port; a discharging pipe is arranged on one side of the crushing box; a rotating shaft is rotationally mounted in the center of the top of the crushing box; a protective shell is fixedly mounted at the top of the crushing box; a rotating motor is fixedly mounted on the inner wall of the top of the protective shell; an output shaft of the rotating motor is fixedly assembled with the top end of the rotating shaft; a primary filter screen and a secondary filter screen are arranged in the crushing box; an annular supporting block is fixedly mounted at the top of the crushing box; an annular groove isformed in the bottom of the annular supporting block; two arc-shaped guide blocks are mounted in the annular groove in a sliding mode; and the same welding rod is fixedly mounted at the bottom ends of the two arc-shaped guide blocks. According to the raw material crushing device for automobile intelligent manufacturing, raw materials can be sufficiently crushed and filtered, the crushing effect and the filtering effect are improved, and meanwhile, the crushing condition can be automatically monitored.

The invention disclosed an integrated filter inductance transformer, comprising a primary winding, a secondary winding, and LC resonant circuits of each winding characteristic harmonics, wherein the reactance L of the resonant circuits is a two-segment adverse-parallel symmetric interleaving winding which is wound with the primary winding and the secondary winding on the same iron core in a up-down symmetry manner. In the invention, the LC resonant circuits of each winding characteristic harmonics can eliminate the harmonic flux of the iron core, and prevent the harmonics from passing back, thereby realizing the function of filtering the primary winding harmonics; meanwhile, the transformer also has the function of reactive power compensation.