CN103736348B - A kind of air purifier - Google Patents

Abstract

The present invention relates to air purification field, particularly a kind of air purifier.Does is the air quality of air after the purification of this air purifier up to state standards GB/T? 18883-2002 " Indoor Air Quality standards ", its chemically index can reach: total volatile organism (TVOC) & lt; 0.6mg/m ³, pellet & lt; 0.15mg/m ³; Biological index can reach: total plate count & lt; 2500cfu/m ³; Also containing a large amount of negative oxygen ion in air after purification, the cerebral cortex process of inhibition of people can be made to strengthen and adjust corticocerebral function, therefore can play calmness, hypnosis and hypotensive activity, be conducive to the physical and mental health of human body; This air purifier makes gas reduction in air to not contaminated front initial optimum state, office work personnel be kept a cool head, be conducive to the accuracy of increasing work efficiency and working.

Description

an air purifier

technical field

The invention relates to the field of air purification, in particular to an air purifier .

Background technique

At present, the social economy is developing rapidly, but the air quality is declining. People are working intensely and quickly. The air quality in the office is particularly important, especially for the staff in the scientific research, medical and financial service industries. The indoor air quality is high. Inhaling clean air can make the staff clear-headed, concentrate and maintain high work efficiency. Therefore, there is an urgent need for an air purifier that can efficiently purify the air on the market .

Contents of the invention

The object of the present invention is to provide an air cleaner to solve the above problems.

In order to solve the above technical problems, the technical solution provided by the invention is:

An air purifier, comprising a housing and an exhaust fan, one end of the housing is provided with an air outlet, the other end of the housing is provided with an air inlet, and the exhaust fan is arranged at the air inlet for blowing the air It is pumped into the casing, which also includes a preliminary filter device, an electrostatic field filter device, an adsorption medium filter device, and a photocatalytic purification device arranged in sequence according to the direction of air circulation;

The primary filtering device is a well convex net or a primary effect filter net, and the well convex net is composed of a nylon mesh with a predetermined diameter value, and the primary effect filter net is composed of two layers of fibers or non-woven fabrics. The filter device is arranged at the air inlet, and is used to filter and remove particulate pollutants in the air whose particle size diameter is larger than the predetermined diameter value;

The electrostatic field filtering device includes a casing and an inner frame, the left and right sides of the casing are provided with insulating seats, and the upper and lower sides of the casing are not closed and are provided with not less than one aluminum round rod; The inner frame includes a conduction tube and a metal plate vertically arranged on the same plane as the central axis of the aluminum round rod. Both ends of the metal plate are tooth-shaped, and the metal plate is fixed on the conduction tube. The inner frame is fixed in the casing through the insulating seat; the casing is provided with a negative electrode interface, and the inner frame is provided with a positive electrode interface; Respirable particles and bacteria;

The adsorption medium filter device includes a filter plate composed of two layers of nylon mesh with activated carbon sandwiched in the middle. 3. A filter plate composed of two layers of nylon mesh sandwiched with an adsorption medium for removing formaldehyde. The second filter plate is composed of two layers of nylon mesh as the adsorption medium of the substance; the first filter plate and the second filter plate cross each other obliquely to form a V shape, and the third filter plate is arranged laterally on the first filter plate and the second filter plate on the intersection; said filter plate one is used to filter out formaldehyde in the air, said filter plate two is used to filter out sulfide in the air, and said filter plate three is used to filter out formaldehyde, volatile matter, sub-micron dust and bacteria, and remove odors;

The photocatalytic purification device is composed of an aluminum tube and an ultraviolet lamp tube sprayed with nano-scale titanium dioxide on the surface, and is used for killing bacteria, decomposing benzene and peculiar smell;

The inner wall of the housing is provided with a layer of adsorption filter membrane, the main component of the adsorption filter membrane is a cold catalyst solution, and the cold catalyst solution contains nano-scale titanium dioxide, zinc oxide, silver, platinum and active sodium salt; The filter membrane is used to decompose and remove formaldehyde, benzene and volatile organic compounds in the air.

As a further improvement of the present invention, according to the direction of air circulation, a molecular resonance filter device is also provided after the photocatalytic purification device, and a molecular resonance plate is arranged inside the molecular resonance filter device, and the molecular resonance plate is made of ceramic materials and negatively charged ions. Composed of generating materials, the molecular resonance filter device is used to generate negative electrons, and the negative electrons combine with oxygen ions in the air to generate negative oxygen ions.

As a further improvement of the present invention, according to the direction of air flow, an anion generating device is provided after the molecular resonance filter device, and the anion generating device is used to generate negative ions and release the negative ions into the air.

As a further improvement of the present invention, according to the direction of air flow, an atomizing device is arranged after the negative ion generating device, and the atomizing device mainly includes a storage chamber, a pressure regulating chamber and a nozzle for humidifying the air.

As a further improvement of the present invention, the predetermined diameter is 10 microns.

As a further improvement of the present invention, the electrostatic field filtering device also includes a high-voltage generator, the positive pole of the high-voltage generator is connected to the positive pole interface on the inner frame, and the negative pole of the high-voltage generator is connected to the machine Connect to the negative terminal on the shell.

As a further improvement of the present invention, the well convex net is composed of four layers of nylon nets with a hole diameter of 0.01mm.

In the air purifier of the present invention, one end of the casing is provided with an air outlet, the other end of the casing is provided with an air inlet, and the exhaust fan is arranged at the bottom of the casing for sucking air into the casing, which is characterized in that , which also includes a preliminary filter device, an electrostatic field filter device, an adsorption medium filter device, and a photocatalytic purification device arranged in sequence according to the direction of air circulation; the inner wall of the housing is provided with a layer of adsorption filter membrane, and the main components of the adsorption filter membrane are Cold catalyst solution, the cold catalyst solution contains nano-scale titanium dioxide, zinc oxide, silver, platinum and active sodium salt; the adsorption filter membrane is used to decompose and remove formaldehyde, benzene and volatile organic compounds in the air. In the air purifier of the present invention, in the first step, negative pressure is generated in the housing to allow air to enter from the air inlet; in the second step, the particle pollutants in the air whose particle size diameter is larger than a predetermined diameter are filtered; in the third step, the air is removed Inhalable particles and bacteria with a medium particle size diameter smaller than the predetermined diameter value; the fourth step is to filter out formaldehyde, sulfide, volatile substances and submicron dust and bacteria in the air, and remove odors; the fifth step is to kill Kill bacteria, decompose odor and benzene; the sixth step, the purified air is discharged; and because of the adsorption filter membrane on the inner wall of the shell, the adsorption filter membrane can decompose and remove formaldehyde and benzene in the air under no light and visible light and volatile organic compounds; the inner wall of the shell illuminated by the ultraviolet lamp tube of the photocatalytic purification device is in visible light, and the adsorption filter membrane can decompose and remove formaldehyde, benzene and volatile organic compounds in the air; in the ultraviolet light of the photocatalytic purification device The inner wall of the shell that the lamp tube cannot irradiate is in the dark condition, and the adsorption filter membrane can also decompose and remove formaldehyde, benzene and volatile organic compounds in the air; Formaldehyde, benzene and volatile organic compounds in the air. The air purifier has a compact and simple structure and a beautiful appearance; in the corresponding purification space and time, the air quality of the air purified by the air purification treatment method reaches the national standard GB/T18883-2002 "Indoor Air Quality Standard", its chemical Sexual indicators can reach: total volatile organic compounds (TVOC) <0.6mg/m3, inhalable particulate matter <0.15mg/m3; biological indicators can reach: total number of colonies <2500cfu/m3.

Description of drawings

For ease of illustration, the present invention is described in detail by the following preferred embodiments and accompanying drawings.

Fig. 1 is the internal schematic diagram of air purifier of the present invention;

Fig. 2 is the block flow diagram of air purification processing method of the present invention;

Fig. 3 is the sectional view of electrostatic field filtering device in the air purifier of the present invention;

Fig. 4 is the sectional view of adsorption medium filtering device in the air purifier of the present invention;

Fig. 5 is a comparison chart before and after the formaldehyde removal purification effect of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, a kind of air purifier of the present invention comprises housing 1 and blower fan 4, and the top of housing 1 is provided with air outlet 3, and the bottom of housing 1 is provided with air inlet 2, and blower fan 4 is provided with In the lower part of the housing 1, it is used to draw air into the housing 1, which also includes well convex nets 5 or primary filter screens, electrostatic field filter devices 6, and adsorption medium filter devices arranged in sequence according to the direction of air circulation. 7. Photocatalytic purification device 8; the well convex net 5 is composed of nylon net with a pore size of 0.01 mm, the primary effect filter is composed of two layers of fibers or non-woven fabrics, and the well convex net 5 or the primary effect filter is arranged at the air inlet 2 place, used to filter and remove particulate pollutants with a particle size diameter greater than 10 microns in the air;

As shown in Figure 3, the electrostatic field filtering device 6 includes a casing and an inner frame. The casing is a hexahedron. The left and right sides of the casing are provided with insulating seats. One aluminum round rod 12; the inner frame includes a conduction tube and a metal plate 13 vertically arranged on the same plane as the central axis of the aluminum round rod, the two ends of the metal plate are toothed, and the metal plate is fixed on On the conduction pipe, the inner frame is fixed in the casing through the insulating seat; the casing is provided with a negative electrode interface, and the inner frame is provided with a positive electrode interface; the electrostatic field filter is used to remove particles with a diameter less than 10 microns inhalable particles and bacteria.

As shown in Fig. 4, the adsorption medium filtering device comprises a filter plate three 17 composed of two layers of nylon mesh with active carbon interposed therebetween, a filter plate one 16 composed of two layers of nylon mesh sandwiched with an adsorption medium for removing formaldehyde, A filter plate 2 19 composed of two layers of nylon nets sandwiching an adsorption medium for removing sulfides; the filter plate 16 and the filter plate 2 19 cross each other obliquely to form a V shape, and the filter plate 3 is arranged transversely on the filter plate One 16 and the intersection of filter plate two 19; The filter plate one is used to filter out formaldehyde in the air, the filter plate two is used to filter out sulfide in the air, and the filter plate three is used to filter out the formaldehyde in the air Formaldehyde, volatile substances, sub-micron dust and bacteria, and remove odors; photocatalytic purification device 8 includes aluminum tubes and ultraviolet lamps with nano-scale titanium dioxide sprayed on the surface, which are used to kill bacteria, decompose benzene and odors; ultraviolet lamps The tube is arranged in the aluminum tube, or not in the aluminum tube, but on the inner wall of the housing 1 .

The inner wall of the housing 1 is provided with a layer of adsorption filter membrane, the main component of the adsorption filter membrane is cold catalyst solution, the cold catalyst solution contains nano-scale titanium dioxide, zinc oxide, silver, platinum and active sodium salt; the adsorption filter membrane is used It is used to decompose and remove formaldehyde, benzene and volatile organic compounds in the air. The adsorption filter membrane can play its role under no light and visible light, and can adsorb and decompose harmful substances such as formaldehyde, benzene and volatile organic compounds. The base material of the cold catalyst solution is ultra-fine (nano-scale), which can give full play to the characteristics of super strong physical adsorption and chemical decomposition generated after it collides with various harmful substances, so that it can be used no matter in the absence of light or visible light. Harmful substances such as formaldehyde, benzene and volatile organic compounds are adsorbed and decomposed.

An air purifier of the present invention may also include a molecular resonance filter device 9, which is arranged after the photocatalytic purification device 8, and a molecular resonance plate is provided in the molecular resonance filter device 9 for generating negative electrons, and The negative electrons combine with oxygen ions in the air to produce negative oxygen ions.

A kind of air purifier of the present invention can also comprise negative ion generating device 11, according to air circulation direction, this negative ion generating device 11 is arranged after molecular resonance filter device 9, is used for generating negative ion, and negative ion is released in the air.

A kind of air purifier of the present invention can also comprise atomizing device 10, and this atomizing device 10 is arranged after negative ion generating device 11, and atomizing device 10 mainly comprises storage chamber, pressure regulating chamber and nozzle, is used for humidifying air, The atomizing device 10 can be arranged inside the housing, or on the outer wall of the housing.

For ease of understanding, the present invention provides an embodiment of an air purifier.

As shown in Figures 1 to 5, an air purifier of the present invention includes a housing 1 and an exhaust fan 4, the upper part of the housing 1 is provided with an air outlet 3, the lower part of the housing 1 is provided with an air inlet 2, and the exhaust air The machine 4 is arranged at the lower part of the housing 1, and is used to draw air into the housing 1, which also includes a well convex net 5, an electrostatic field filter device 6, an adsorption medium filter device 7, a light Catalytic purification device 8;

The well convex net 5 is composed of four layers of nylon nets with an aperture of 0.01mm. The well convex net 5 is set at the air inlet 2. The well convex net 5 has four layers of nylon nets with an aperture of 0.01mm. At this time, it can filter and remove particles in the air. For particulate pollutants with a diameter greater than 10 microns, the four-layer nylon mesh is reasonably arranged and set, and can even filter and remove particulate pollutants with a diameter of 5 microns in the air. After testing, four layers of nylon mesh with a pore size of 0.01mm are used to filter and remove air. The effect of particle pollutants with a medium particle size greater than 10 microns is obvious, and the durability of the four-layer nylon mesh is relatively high. It can be replaced with other devices in the present invention at the same time, and can also be cleaned and reused to maintain the same maintenance period as other devices. , can save the number of maintenance work and efficiency, and the cost is relatively low, the best cost performance.

The electrostatic field filtering device 6 includes a casing 15, a high voltage generator and an inner frame. The casing is a hexahedron. The left and right sides of the casing are provided with insulating seats. The upper and lower sides of the casing are not closed and are not less than one. root aluminum round rod 12; the inner frame includes a conduction tube 14 and a metal plate 13 vertically arranged on the same plane as the central axis of the aluminum round rod, the two ends of the metal plate are toothed, and the metal plate is fixed on On the conduction tube, the inner frame is fixed in the casing through the insulating seat; the casing is provided with a negative interface, and the inner frame is provided with a positive interface; the positive electrode of the high voltage generator is connected to the positive interface on the inner frame , the negative electrode of the high-voltage generator is connected to the negative electrode interface on the casing; the electrostatic field filter is used to remove inhalable particles and bacteria with a particle size diameter of less than 10 microns in the air. The two ends of the tooth shape of each metal plate 13 are respectively vertically corresponding to an aluminum round rod 12, the double-sided tooth shape of the metal plate 13 is used as the positive pole, and the aluminum round rod 12 is used as the negative pole. Corona is generated, because the tooth shape is double-sided, so two layers of electrostatic fields are generated, that is, double electrostatic fields, and the discharge forms two strong ionized regions, and its corona number increases sharply, thus forming two not only strong but also dense In the high ionization zone, the time for bacteria to enter the ionization zone is long, so that the negatively charged bacteria and microorganisms in the air are infiltrated by high-concentration and high-energy positive ions, causing the bacteria to undergo an instantaneous electrolysis process; causing serious damage to the cell wall of the bacteria Destruction, positive ions contact with the surface of bacteria to release charges, enough positive ions will penetrate the cell wall, penetrate into the interior of the cell, destroy the nucleus, cause the death of bacteria, and achieve the effect of sterilization. At this time, the floating dust of inhalable particles with a particle size diameter of less than 10 microns is effectively adsorbed on the aluminum round rod 12 and the metal plate 13 to remove inhalable particles and bacteria with a particle size diameter of less than 10 microns in the air; At this time, the floating dust has been positively charged; in addition, the inner wall of the housing 1 is sprayed with a cold catalyst solution to form an adsorption filter membrane, so the inner walls of the housing on both sides of the electrostatic field filter device 6 form a layer of adsorption filter membrane. The solution contains nano-scale titanium dioxide, zinc oxide, silver, platinum and active sodium salt. This layer of adsorption filter membrane is located on the inner wall of the shell next to the electrostatic field filter device 6. Although it is in the absence of light, it can also play its role. , effectively decomposes and removes formaldehyde, benzene and volatile organic compounds in the air.

The adsorption medium filter device includes a filter plate three 17 composed of two layers of nylon mesh sandwiching activated carbon, a filter plate one 16 composed of two layers of nylon mesh sandwiching an adsorption medium for removing formaldehyde, The filter plate two 19 that the two-layer nylon mesh of the adsorption medium of sulfide constitutes; Described filter plate one is used for filtering out the formaldehyde in the air, and described filter plate two is used for filtering out the sulfide in the air, and described filter plate 3. It is used to filter out formaldehyde, volatile substances, sub-micron dust and bacteria in the air, and remove peculiar smell; the adsorption medium for removing formaldehyde is bio-ceramic or alumina powder or silicon oxide powder; remove the adsorption of sulfide The medium is ultra-high molecular weight polyethylene powder or natural mixed metal oxides (such as zinc oxide powder), and its removal efficiency of sulfide is 99%. Four filter plates one 16 and filter plate two 19 are arranged obliquely across each other, filter plate three 17 are arranged horizontally at the intersection of filter plate one 16 and filter plate two 19, and bracket 19 is used to fix filter plate one 16 and filter plate Two 19. The first filter plate 16 and the second filter plate 19 in the adsorption medium filter device 7 cross each other obliquely to form a V shape, and the third filter plate 17 is horizontally arranged on the intersection of the first filter plate 16 and the second filter plate 19, for better It can effectively and efficiently remove the sulfide and formaldehyde in the passing air, save the design space of the whole shell 1, make the structure inside the whole shell 1 more compact, and make the inside and outside of the whole shell 1 limited space (such as office ) to form a cycle, within a limited time (such as 1 hour), the air purifier of the present invention is turned on, and the air in the external limited space and the housing 1 circulates 80 times, and the adsorption medium filter device 7 removes sulfide and formaldehyde in the air The effect is obvious, and the air quality regulations of the national standard can be achieved. The third filter plate 17 is horizontally arranged at the intersection of the first filter plate 16 and the second filter plate 19, which can absorb a certain degree of formaldehyde and volatile substances, thereby further removing formaldehyde in the air, and can also absorb submicron dust and Bacteria and odor removal (such as carbon monoxide and other organic compounds), at this time, the submicron dust and bacteria are endowed with positive charges when passing through the electrostatic field filter device 6, and can be better absorbed by the filter plate 3 17, which is very The application effect of the upper and lower design of the electrostatic field filter device 6 and the adsorption medium filter device 7 is well utilized to filter out formaldehyde, volatile substances, submicron dust and bacteria in the air, and remove peculiar smell. In addition, the cold catalyst solution is sprayed on the inner wall of the housing 1 to form an adsorption filter membrane, so the inner walls of the housing on both sides of the adsorption medium filter device 7 form a layer of adsorption filter membrane. The cold catalyst solution contains nano-scale titanium dioxide, zinc oxide, silver, etc. , platinum and active sodium salt. This layer of adsorption filter membrane is located on the side shell wall of the adsorption medium filter device 7. Although it is in the absence of light, it can also play its role and effectively decompose and remove formaldehyde in the air. Benzene and VOCs.

The photocatalytic purification device 8 includes an aluminum tube and an ultraviolet lamp tube sprayed with nano-scale titanium dioxide on the surface. The ultraviolet lamp tube is arranged in the aluminum tube. The cylindrical surface of the aluminum tube is provided with many through holes, and ultraviolet rays can be irradiated through these through holes. Under the irradiation of ultraviolet rays from the ultraviolet lamp tube, the electrons on the surface of the aluminum tube undergo transitions to form positively charged holes. The positively charged holes have strong oxidative properties and can adsorb OH and H2O on the surface of the particles and oxidize them into OH free radicals. etc., and OH is a strong oxidizing agent, which can decompose organic matter and finally transform it into carbon dioxide and water, decompose the benzene ring in benzene in the air, thereby removing benzene; and effectively kill bacteria and viruses in the air and mold, decompose odor and volatile organic compounds, and achieve the effect of killing bacteria and decomposing odor. In addition, the inner wall of the housing 1 is sprayed with a cold catalyst solution to form an adsorption filter membrane, so the inner walls of the housing on both sides of the photocatalytic purification device 8 form an adsorption filter membrane. The cold catalyst solution contains nano-scale titanium dioxide, zinc oxide, and silver. , platinum and active sodium salt. This layer of adsorption filter membrane is located on the inner wall of the housing next to the photocatalytic purification device 8. Under the irradiation of ultraviolet light, it can also play its role and effectively decompose and remove formaldehyde and benzene in the air. and volatile organic compounds.

The molecular resonance filter device 9 is provided with a molecular resonance plate for generating negative electrons, and the negative electrons combine with oxygen ions in the air to generate negative oxygen ions. The molecular resonance plate is composed of ceramic material and negative ion generating material. The ceramic material is sintered by mixing 5%~30% molecular resonance powder into the glaze, and the sintering temperature is between 800°C and 1500°C; The amount of negative ions generated by the generating material is 1000~3000/cm3; when the air passes through the molecular resonance filter device 9, under the physical effect of molecular resonance resonance, the resonance plate will generate a large number of high-energy positrons, and at the same time, the positrons and air After the combination of neutral ions, a large number of negative oxygen ions (more than 6,000 negative oxygen ions can be produced per cubic centimeter), thereby improving air quality, negative oxygen ions can strengthen the inhibition process of the human cerebral cortex and adjust the cerebral cortex. Therefore, it can play the role of sedation, hypnosis and lowering blood pressure. The air contains a large amount of negative oxygen ions, which is beneficial to the physical and mental health of the human body; in addition, when various gases with pollutants pass through the surface of the resonance plate, the disordered The low-energy potential sequence quickly jumps to an orderly high-energy potential sequence. Under the action of molecular resonance, these pollutants are synthesized or complexed, and the gas is restored to the initial optimal state before being polluted.

Negative ion generating device 11 is arranged on the top of housing 1 and is used to generate negative ions and release negative ions into the air. The negative ions can reduce active oxygen (oxygen free Base), reduce the harm of too much active oxygen to the human body; and neutralize the positively charged air dust without charge and then settle, so that the air is purified, and the air contains a large number of negative ions, which can strengthen the human cerebral cortex function and mental activity , to strengthen the oxidation process of the brain tissue, so that the brain tissue can get more oxygen, refresh the mind, eliminate fatigue and burnout, and improve work efficiency.

Atomization device 10, the atomization device 10 mainly includes a storage chamber, a pressure regulating chamber and a nozzle, which are arranged directly below the air outlet 3 and on the outer wall of the housing 1, so as to facilitate the humidification of the purified air, and are used for humidification Air, increase the moisture in the air, keep the air humidity, reduce the probability of indoor workers suffering from respiratory diseases, the storage chamber of the atomization device 10 is used to store water; the present invention also provides an embodiment of the atomization device In the manufacturing process of the memory of the atomization device, ceramic materials and negative ion generating materials are added to the raw materials of the memory in a certain proportion to make it a memory with the principle of molecular resonance, which increases the activity of atomized water molecules, thereby Further increase the negative oxygen ions in the air.

The air purifier has an obvious effect on purifying formaldehyde. After the inspection by the National Air Conditioning Equipment Quality Supervision and Inspection Center, the test report shows that the comparison of the formaldehyde purification effect before and after the purification effect shows that the formaldehyde concentration in the test cabin is 1.13mg/m3 before the purifier is turned on. When the purifier is turned on for 0.5 hours, the concentration drops to 0.22mg/m3, and after it is turned on for three hours, it drops to 0.07mg/m3. The test results can be found in the test report National Air Quality Inspection (Committee) Word (2007) No. GZAC06, as shown in the figure As shown in 5, it is a comparison chart before and after the purification effect of formaldehyde removal.

The sterilizing effect of the air purifier is also very obvious. After testing, the test report shows that the background number of indoor bacterial colonies is greater than or equal to 800cfu/m3 before the purifier is turned on. When the purifier is turned on for 1.5 hours, the test result is 0cfu/m3. For details, see the test report (2001) Quantity Recognition (Su) Zi No. S0114 (Xiao) Jian Zi No. 2002222.

The size of the housing 1 of the air purifier can be 480mmX317mmX1540mm or 480mmX363mmX1710mm or 520mmX373mmX1780mm or 520mmX419mmX1780mm or 520mmX419mmX1780mm or 520mmX780mmX1780mm; the processing air volume is 900~6000m3/h.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (6)

1. An air cleaner, comprising a housing and an exhaust fan, one end of the housing is provided with an air outlet, the other end of the housing is provided with an air inlet, and the exhaust fan is located at the air inlet, It is used to draw air into the casing, and it is characterized in that it also includes a preliminary filter device, an electrostatic field filter device, an adsorption medium filter device, and a photocatalytic purification device arranged in sequence according to the direction of air circulation; The primary filtering device is a well convex net or a primary effect filter net, and the well convex net is composed of a nylon mesh with a predetermined diameter value, and the primary effect filter net is composed of two layers of fibers or non-woven fabrics. The filter device is arranged at the air inlet, and is used to filter and remove particulate pollutants in the air whose particle size diameter is larger than the predetermined diameter value; The electrostatic field filtering device includes a casing and an inner frame, the left and right sides of the casing are provided with insulating seats, and the upper and lower sides of the casing are not closed and are provided with not less than one aluminum round rod; The inner frame includes a conduction tube and a metal plate vertically arranged on the same plane as the central axis of the aluminum round rod. Both ends of the metal plate are tooth-shaped, and the metal plate is fixed on the conduction tube. The inner frame is fixed in the casing through the insulating seat; the casing is provided with a negative electrode interface, and the inner frame is provided with a positive electrode interface; Respirable particles and bacteria; The adsorption medium filter device includes a filter plate composed of two layers of nylon mesh with activated carbon sandwiched in the middle. 3. A filter plate composed of two layers of nylon mesh sandwiched with an adsorption medium for removing formaldehyde. The second filter plate is composed of two layers of nylon mesh as the adsorption medium of the substance; the first filter plate and the second filter plate cross each other obliquely to form a V shape, and the third filter plate is arranged laterally on the first filter plate and the second filter plate on the intersection; said filter plate one is used to filter out formaldehyde in the air, said filter plate two is used to filter out sulfide in the air, and said filter plate three is used to filter out formaldehyde, volatile matter, sub-micron dust and bacteria, and remove odors; The photocatalytic purification device is composed of an aluminum tube and an ultraviolet lamp tube sprayed with nano-scale titanium dioxide on the surface, and is used for killing bacteria, decomposing benzene and peculiar smell; The inner wall of the housing is provided with a layer of adsorption filter membrane, the main component of the adsorption filter membrane is a cold catalyst solution, and the cold catalyst solution contains nano-scale titanium dioxide, zinc oxide, silver, platinum and active sodium salt; The filter membrane is used to decompose and remove formaldehyde, benzene and volatile organic compounds in the air; According to the direction of air circulation, a molecular resonance filter device is also set after the photocatalytic purification device, and a molecular resonance plate is arranged in the molecular resonance filter device, and the molecular resonance plate is made of ceramic materials and negatively charged ion generating materials. The filter device is used to generate negative electrons, and the negative electrons combine with oxygen ions in the air to generate negative oxygen ions . 2. The air purifier according to claim 1, characterized in that, according to the air flow direction, an anion generating device is also arranged after the molecular resonance filter device, and the anion generating device is used to generate anion, and anion is released into in the air. 3. air purifier according to claim 2, it is characterized in that, by air circulation direction, atomizing device is also set after described negative ion generating device, and described atomizing device mainly comprises storage chamber, pressure regulating chamber and nozzle, For humidifying the air. 4. The air cleaner according to claim 3, wherein the predetermined diameter is 10 microns. 5. The air purifier according to claim 3, wherein the electrostatic field filter device also includes a high-voltage generator, the positive pole of the high-voltage generator is connected to the positive pole interface on the inner frame, and the high-voltage generator The negative pole of the generator is connected with the negative pole interface on the casing. 6. The air purifier according to claim 4, characterized in that, the well convex net is composed of four layers of nylon nets with an aperture of 0.01mm .