WO2018049701A1

WO2018049701A1 - Micro-channel structure precipitator for particulate matter, precipitation method, and manufacturing method thereof

Info

Publication number: WO2018049701A1
Application number: PCT/CN2016/100810
Authority: WO
Inventors: 王宝柱; 侯伟; 张家友; 李春雨
Original assignee: 东莞市宇洁新材料有限公司
Priority date: 2016-09-14
Filing date: 2016-09-29
Publication date: 2018-03-22
Also published as: CN107812612A; CN107812612B

Abstract

A micro-channel structure precipitator for particulate matter, precipitation method, and manufacturing method thereof. A main body (1) of the precipitator has pores (110) arranged in an array. Inner upper and inner lower walls of the pores (110) are provided with conductive portions (2) made from a conductive material. A conductive film (3) is provided on an outer surface of the pores (110) on the other side opposite to the conductive portions (2). The conductive portions (2) of all pores (110) are electrically connected to form a first electrode. The conductive film (3) is used as a second electrode. The method of the present invention employs an electrostatic coagulation process to trap and collect particulate matter passing through the pores (110). When an air flow passes through a pore (110), the first electrode enables particulate matter in the air flow to be electrically charged, such that coagulation occurs, and the particulate matter is adsorbed on to the inner walls of the pore (110) under the action of a Coulomb force and a magnetic force, completing entrapment and collection of the particulate matter. Compared to the prior art, the precipitator of the present invention has the conductive portions (2) directly disposed within micro-channels formed by the pores (110), and forms, within the micro-channels, a distinctive region having a strong electrical field by directly connecting an electrode of a high-voltage power supply to the conductive portions (2) to increase the intensity of an internal asymmetrical electrical field, thus enhancing the efficiency of electrostatic coagulation and collection, and essentially eliminating the Faraday cage effect.

Description

Microchannel structure particle dust collector, dust collecting method and manufacturing method thereof

Technical field

The invention relates to the technical field of air purification products, in particular to a microchannel structure particle dust collector, a dust collecting method and a manufacturing method thereof, the dust collector can be used for purifying particulate dust in the air, and is applied to a household air purifier and a central unit. Air conditioning, vacuum cleaners, industrial environmental purification equipment.

Background technique

At present, the electrostatic dust collector (Eletrostatic Precipitator) adopts an electrostatic dust collection method represented by a corona-collection method, and has a wide range of wind resistance and regenerability. Applications. However, ESP has many insurmountable shortcomings, such as: corona discharge produces ozone, slight sparking discharge between electrodes, and low efficiency of single filtration.

In view of the deficiencies of the electrostatic dust collector, the invention patent application publication No. 00806175.0 (Prior Art 1) discloses an "air purification device" which uses electrostatic dust collection. Purification equipment. The technical solution adopted is: an array for removing particles carried in the gas stream, including an array of holes through which the gas stream can pass relatively freely, the holes being provided between the plastic walls; means for forcing the gas flow through the array The plastic wall has a region of electrically conductive material in contact therewith; and means for staggering the application of high and low potentials to the region of electrically insulating material to provide a location of charge in the array to collect particles from the gas stream.

A series of structures and combinations are proposed in the above patent proposal, wherein the manner of "staggering the electrodes on both sides of the plastic double-walled corrugated sheet material" is an important embodiment, but there are still many problems that have not been solved. include:

1. Using a symmetrical channel structure with smooth inner wall, during the use process, due to the resistance change of the surface dust, it is easy to cause the Faraday cage phenomenon, which shows that the internal potential difference decreases, and the Coulomb force deflection and trapping effect on the particulate matter is lost. This in turn leads to a decrease in dust accumulation capacity or even failure.

2. The channel structure made of simple high-resistance material is attached to the outside of the channel. When collecting high-impedance dust, the charge of the dust and the high-impedance hole wall are prone to reverse polarization, which reduces the internal potential difference. The collection efficiency of particulate matter decreases rapidly.

In response to the above problems, after continuous research and experimentation, the applicant proposed an improved technical solution to the State Intellectual Property Office on December 29, 2011. See the patent specification of the Chinese Patent No.: 201110453643.8 (Prior Art 2). The technical solution adopted by the invention patent is that the main body of the dust collecting filter is composed of a plurality of multi-layered orifice plates, wherein the orifice plate is integrally formed with a gas for passage. Array holes, the orifice plate is micro-foamed, can add electret reinforcement material, negative separation a plastic material of a sub-emission material and a magnetic material, wherein a sealing conductive film to which a high-voltage electric field is applied is disposed on the upper and lower surfaces of each of the orifice plates, and one or more of the orifice plates may be mounted with an ion-emitting device on the side of the superposed structure The package has a high-voltage power supply for supplying high and low potential electrodes, and the superposed structure and the high-voltage power supply are integrally packaged in the outer frame of the protection structure, and the external power supply is used by low-voltage direct current or commercial power. The filter is processed by the online polarization electret technique to form a practical product. The invention adopts the above technical solution, and constitutes a particulate filter which can eliminate the ignition between the poles and the use of electric shock, is easy to clean, can be used for long life, has low wind resistance and high efficiency,

In the above prior art 1, the structure of the array holes is adopted in the prior art 2, and the potential arrangement patterns between the holes of each layer are distributed by means of "...high-low-high-low..." And applying a high voltage outside each layer of the array channel is achieved by a conductive film attached to the lower surface of each of the orifice plates.

For the prior art one, the principle of dust collection is shown in FIG. 1 , which adopts the technology equivalent to a parallel electrode coated with a high-resistance dielectric material on the surface, and a support piece is installed in the middle. The biggest disadvantage is that after collecting a certain amount of charged particles on the surface of the high-resistance medium, the reverse polarization phenomenon is very likely to occur, resulting in a rapid decline in dust collection efficiency. When the air humidity is relatively high and the particulate matter resistance value is lower than the lowest, the internal surface resistance decreases after the dust accumulation, and an equipotential (Faraday cage) phenomenon is formed, resulting in a rapid decrease or loss of the dust accumulation efficiency. A slight scale residue on the surface after cleaning can cause the Faraday cage phenomenon to occur, which in turn leads to failure.

For the prior art 2, it is an improvement made by the prior art. The principle of dust collection is shown in FIG. 2, which designs an asymmetric fin structure channel according to the principle of electrostatic field discharge, and adopts electrostatic condensation. And trapping the magnetic field-assisted dust accumulation method (electric field, magnetic field, and electrostatic condensation), while strengthening the electret performance and increasing the dust holding capacity, although the reverse polarization and Faraday cage phenomenon are eliminated to some extent, and The cleaning and maintenance cycle has been extended, but this phenomenon cannot be completely overcome.

In view of the deficiencies of the above prior art, the inventors have again developed and experimented with the following technical solutions.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a microchannel structure particulate dust collector which can improve the trapping effect, strengthen the electrostatic condensation efficiency, and substantially eliminate the Faraday cage phenomenon and the reverse polarization phenomenon. , dust collecting method and its making method.

In order to solve the above technical problem, the microchannel structure particulate dust collector of the present invention adopts the following technical solution: the main body of the dust collector is composed of a plurality of layers of orifice plates made of high-resistance electret materials, and each layer of orifice plates is formed. Formed integrally with an array of holes for gas passage, the holes are symmetric with the left and right inner walls, and the upper and lower inner walls are asymmetric, that is, the holes are provided with fins at least on the upper inner wall or the lower inner wall; the holes in each of the holes The upper inner wall or the lower inner wall is provided with a low impedance a conductive portion, and all of the conductive portions are electrically connected to form a first electrode; a conductive film is disposed on an outer surface of the opposite side of the opposite conductive portion of each of the orifice plates, the conductive film forming a second electrode; the first electrode and The second electrode is connected to the positive and negative electrodes of the high voltage power supply for applying a high voltage electric field outside the main body of the dust collector.

Further, in the above technical solution, the multi-layer orifice plate in the main body of the dust collector is superposed in such a manner that the orifice plate is connected by the same pole, that is, the electrode disposed on the adjacent side of the two adjacent orifice plates. the same.

Further, in the above technical solution, if the fin is disposed on an inner wall adjacent to a side of the first electrode, the fin is integrally formed with the conductive portion; if the fin is disposed adjacent to the second electrode side The inner wall of the fin is integrally formed with the hole.

Further, in the above technical solution, the hole is provided with fins on both the upper inner wall and the lower inner wall, and all the fins are integrally formed with the holes.

Further, in the above technical solution, the conductive portions in the respective holes in the first electrode are connected by a conductive mesh.

Further, in the above technical solution, the orifice plate is injection-molded by using a material having electret properties, and the material of the orifice plate is: a mixture of a high-resistance material and an electret material; the material of the conductive portion is a mixture of a low-resistance material and a conductive material; the conductive film is composed of graphite, carbon black, a rare earth permanent magnet material powder, and a binder, and is attached to the outer surface of the orifice plate by screen printing.

Further, in the above technical solution, the orifice plate and the conductive portion are formed by double-coextrusion.

Further, in the above technical solution, the hole is provided with fins on the upper inner wall and the lower inner wall, and all the fins are integrally formed with the hole; wherein the conductive portion is disposed on the upper inner wall by using micropores. Or in the lower inner wall.

The microchannel structure particulate dust collector method of the present invention adopts the following technical solution: in the method, the main body of the dust collector is a hole having an array distribution, and the upper inner wall or the lower inner wall of the hole is provided with a conductive portion made of a conductive material. The outer surface of the hole opposite to the conductive portion is provided with a conductive film; the conductive portions of all the holes are electrically connected to form a first electrode; and the conductive film is used as a second electrode; the method uses an electrostatic condensation method to capture particles passing through the hole By applying a high voltage to the first electrode and the second electrode and flowing the airflow through the hole, the first electrode charges the particles in the air, condenses and adsorbs on the inner wall of the hole under the action of Coulomb force and magnetic force. , complete the capture of particulate matter.

The microchannel structure particle dust collector manufacturing method of the invention adopts the following technical solution: the manufacturing method comprises the following steps: First, an orifice plate is prepared, the orifice plate is injection molded by using a material having a residence polarity property, and the orifice plate is used. The material is: a mixture of a high-resistance material and an electret material; the conductive portion is made of a mixture of a low-resistance material and a conductive material; and a material having an electret property for making an orifice plate and a material for making a conductive portion; Through injection molding equipment, using double The co-extrusion method is co-extrusion from a two-material synthetic molding die; after the double-coextrusion molding, the orifice plate has an array hole through which the gas passes, and the hole is provided with fins at least on the upper inner wall or the lower inner wall, and is electrically conductive. The part is formed on the upper inner wall or the lower inner wall of the hole; secondly, the orifice plate which is formed by the two-material synthetic molding die is corona-treated and magnetized, and then cut into corresponding lengths by a cutting device; then, the above-mentioned orifice plate is superimposed At the same time, before the superposition, the conductive film needs to be disposed on the surface of the corresponding orifice plate by printing. When superimposing, the orifice plate is connected by the same pole, that is, the electrodes disposed on the adjacent sides of the two adjacent orifice plates are the same. The conductive portions in each of the first electrodes are connected by a conductive mesh; finally, all the conductive portions are electrically connected as a first electrode, and all the conductive films are connected as a second electrode for applying a high voltage electric field. Positive and negative electrodes of high voltage power supply.

After the above technical solution is adopted, the conductive portion is directly disposed inside the microchannel formed by the hole, and one electrode of the high voltage is directly connected to the conductive portion, so that the microchannel is formed inside. The distinct electric field region enhances the intensity of the internal asymmetric electric field (potential difference), further enhances the electrostatic condensation efficiency and the collection efficiency, basically eliminates the Faraday cage phenomenon and suppresses the occurrence of surface polarization. Compared with the prior art, the microchannel structure of the present invention can work at a lower voltage than the prior art, further improving safety.

DRAWINGS

1 is a schematic diagram of the principle of dust collection in the prior art;

2 is a schematic diagram of the principle of dust collection in the prior art 2;

3 is a schematic structural view of a single-layer orifice plate according to Embodiment 1 of the present invention;

4 is a schematic structural view of a multi-layer superimposed orifice plate according to Embodiment 1 of the present invention;

5 is a schematic structural view of a conductive region of a hole plate according to Embodiment 1 of the present invention;

6 is a schematic structural view of a conductive film according to Embodiment 1 of the present invention;

7 is a schematic structural view of a single-layer orifice plate in Embodiment 2 of the present invention;

8 is a schematic structural view of a multi-layer superimposed orifice plate according to Embodiment 2 of the present invention;

9 is a schematic diagram of a dust collection principle according to Embodiment 3 of the present invention;

10 is a schematic diagram of a dust collection principle according to Embodiment 4 of the present invention;

11 is a schematic diagram of a dust collection principle according to Embodiment 5 of the present invention;

Figure 12 is a schematic view showing the principle of dust collecting according to Embodiment 6 of the present invention;

Figure 13 is a schematic view showing the principle of dust collection according to Embodiment 7 of the present invention;

Figure 14 is a schematic view showing the dust collecting principle of the eighth embodiment of the present invention;

Figure 15 is a schematic illustration of a dual co-extrusion apparatus of the present invention.

detailed description

Embodiment 1

Referring to Figures 3 and 4, this is a first embodiment of the microchannel structured particulate dust collector of the present invention. In the first embodiment, the main body 1 of a dust collector is provided. The main body 1 is composed of a plurality of multi-layered orifice plates 10 made of a high-resistance electret material. Each of the perforated plates 10 is integrally formed with an array of holes 110 for gas passage. The holes 110 are symmetrical with the left and right inner walls, and the upper and lower inner walls are not. Symmetrical structure.

The upper inner wall or the lower inner wall of the hole 110 in each layer of the orifice plate 10 is provided with a low-resistance conductive portion 2, and all the conductive portions 2 are electrically connected to constitute a first electrode; on the other side of each layer of the orifice plate 10 opposite to the conductive portion 2 The outer surface is provided with a conductive film 3, which constitutes a second electrode; the first electrode and the second electrode are connected to the positive and negative of the high-voltage power source 5 for applying a high-voltage electric field outside the dust collector body 1. electrode. In this embodiment, the first electrode (ie, the conductive portion 2) is connected to the low potential end of the high voltage power source 5, and the second electrode (ie, the conductive film 3) is connected to the high potential end of the high voltage power source 5.

As shown in FIG. 4, the multi-layered orifice plate 10 in the main body 1 of the dust collector is superimposed in such a manner that the orifice plate 10 is connected by the same pole, that is, the electrodes disposed on the adjacent sides of the two adjacent orifice plates 10 are the same. . Taking the example shown in FIG. 4, the voltages applied to each of the orifice plates 10 are arranged in a manner of: low-high-low-low-high-high-low. This arrangement is also an important technical feature that distinguishes the prior art. In the prior art, a conductive film is disposed between the two holes as an electrode, so the voltages arranged on each of the holes in the prior art are arranged in a cross. Arrangement is the way of "low-high-low-high-low".

As shown in FIG. 3, the hole 110 is symmetric with the left and right inner walls, and the upper and lower inner walls are asymmetric. The structure adopted in the first embodiment is that the inner wall of the hole 110 is provided with a fin. 4. The lower inner wall is provided with two fins 4, and the upper and lower fins 4 are arranged in an asymmetric arrangement.

Wherein, the conductive film 3 is located on the upper surface of the orifice plate 10. Correspondingly, the fins 4 disposed on the upper inner wall of the hole 110 of the orifice plate 10 are integrally formed with the hole 110, that is, when the orifice plate 10 is formed, one fin 4 of the upper inner wall is integrally formed.

The two fins 4 on the inner wall of the hole 110 are integrally formed with the conductive portion 2, that is, the fins 4 on the lower inner wall are formed by the conductive portion 2. When the orifice plate 10 is machined, the two fins 4 on the lower inner wall of the electrically conductive portion 2 are integrally formed with the orifice plate 10 by double coextrusion. The specific production method is as follows:

The orifice plate 10 is injection molded from a material having electret properties, and the orifice plate 10 is made of a mixture of a high-resistance material and an electret material. For example, the high-impedance material is PP, and the added electret material can be: FEP (fluorinated ethylene propylene copolymer, perfluoroethylene propylene copolymer, English trade name: Teflon*FEP (Fluorinated ethylene propylene), FEP (tetrafluoroethylene) And hexafluoropropylene copolymer), PFA (a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene copolymer (Polytetrafluoro thylene), ETFE (ethylene-tetrafluoro-ethylene tetrafluoroethylene).

The conductive portion 2 is made of a mixture of a low-resistance material and a conductive material. The low-impedance material may be PP or PE, and the added conductive material may be: metal oxide (such as tin oxide, indium oxide, etc.), carbon nanotubes, Graphite, polymer organic conductive materials and other materials. The resistance value of the final conductive portion 2 is 10E4 to 10E9 Ω.

The conductive film 3 is composed of graphite, carbon black, a rare earth permanent magnet material powder, and an adhesive, and is attached to the outer surface of the orifice plate 10 by screen printing. When the conductive film 3 is formed, a conductive film 3 may be provided between the two adjacent orifice plates 10. That is, one layer of the conductive film 3 is shared by the adjacent two-hole plate 10 as the second electrode.

Referring to FIG. 15, the orifice plate 10 and the conductive portion 2 are formed by double-coextrusion, and the manufacturing device 6 includes: an electret material injection molding device 61, a conductive material injection molding device 62, and a double material composite molding die 63. A corona device 64, a cooling forming device 65, a counter corona device 66, a pulling roller 67, a second corona device 68, a magnetizing device 69, and a cutting device 60. The electret material is simultaneously injected into the two-material composite molding die 63 through the conductive material injection molding device 62 through the electret material injection molding device 61 and the mixed material of the conductive portion, and finally the orifice plate 10 with the conductive portion 2 is integrally formed. The orifice plate 10 from the two-material synthetic molding die 63 is sequentially passed through the first corona device 64, the cooling forming device 65, the counter corona device 66, the pulling roller 67, the second corona device 68, and the magnetizing device 69, and the electricity is completed. Halo and magnetization are finally cut through the cutting device 60 to a corresponding length.

Then, the above-prepared orifice plate 10 is superposed according to the above-mentioned "low-high-high-low-low-high-low-low" structure, and at the same time, before the superposition, it is necessary to provide a conductive film on the surface of the corresponding orifice plate 10 by printing. 3. At the same time, the conductive portions 2 in the respective orifice plates 10 in the first electrode are connected by a conductive mesh 7. Referring to Fig. 5 and Fig. 6, the conductive film 3 is taken out by means of a printed electrode. The conductive portion 2 is integrally connected to the surface, and then all of the conductive portions 2 are electrically connected by a conductive screen 7 covering the entire side of the orifice plate 10.

Finally, a plurality of orifice plates 10 are superimposed to form the main body 1 of the dust collector, and the ventilating faces of the main body 1 are bonded by means of hot-melt bonding, so that the edges of the two adjacent orifice plates 10 form a closed edge. Specifically employed methods include: flame, surface ultrasonic, friction, hot wire cutting, etc. One of the preferred ways of thermal fusion is hot wire cutting. The heat fusion is beneficial in that a firm and beautiful fusion surface can be obtained, which overcomes the problem that the PP material is difficult to bond. In addition, hot melt adhesive and adhesive are used between the two adjacent orifice plates 10. Thus, the conductive film 3 is completely enclosed between the two-hole plates 10, and the intrusion of external water can be completely prevented, thereby realizing the function of the present invention which is easy to rinse.

As shown in FIG. 3 again, in the operation of the first embodiment, the fins 4 disposed on the lower inner wall of the hole 110 are directly connected to the power supply high voltage power source 5 as the conductive portion 2, so that the fins 4 disposed on the lower inner wall are more strongly loaded. The electrical capability maintains a higher potential difference within the microchannel. Compared with the prior art, using the upper and lower conductive films to form a high voltage electric field, the present invention directly projects one of the electrodes into the hole 110, which not only enhances the strength (potential difference) of the asymmetric electric field inside the hole 110, but further The electrostatic condensation efficiency and the collection efficiency are enhanced, the Faraday cage phenomenon is basically eliminated, and the occurrence of surface polarization is suppressed. In addition, with this structure, the microchannel formed by the array hole 110 can be used than the prior art. Working at a lower voltage further enhances safety.

In the present invention, the hole 110 is formed by asymmetrical left and right inner walls and an asymmetrical structure of the upper and lower inner walls. In addition to the structure adopted in the first embodiment, the following structure may be adopted.

As shown in FIG. 7 and FIG. 8 , this is the second embodiment of the present invention. The solution adopted in the second embodiment is opposite to the first embodiment. In the second embodiment, the inner wall of the hole 110 is provided with two holes. The fins 4 are provided with a fin 4 on the lower inner wall, and the fins 4 on the lower inner wall are integrally formed with the conductive portion 2, that is, the fins 4 on the lower inner wall are formed by the conductive portion 2. Other structures and working principles of the second embodiment are the same as those of the first embodiment, and will not be further described herein.

As shown in FIG. 9, this is the third embodiment of the present invention. The hole 110 of the third embodiment also adopts an asymmetrical structure of upper and lower inner walls. The difference between the first and second embodiments is the hole in the third embodiment. The upper inner wall of the 110 is not provided with fins, the lower inner wall is provided with one fin 4, and the fins 4 on the lower inner wall are integrally formed with the conductive portion 2. The asymmetric structure of the hole 110 of the third embodiment can also achieve the technical problem to be solved by the present invention.

As shown in FIG. 10, this is the fourth embodiment of the present invention. In the fourth embodiment, contrary to the embodiment adopted in the third embodiment, the inner wall of the hole 110 is provided with fins 4 integrally formed with the orifice plate 10, and the lower inner wall is not provided with fins. Sheet 4, but the lower inner wall is also provided with a conductive portion 2 by means of a two-material coextrusion.

As shown in FIG. 11, this is a fifth embodiment of the present invention. In the fifth embodiment, the inner wall of the hole 110 is provided with a fin 4 integrally formed with the orifice plate 10, and the lower inner wall is provided with two integrally formed with the orifice plate 10. Fin 4. At the same time, the conductive portion 2 is injected on the lower inner wall by micropore introduction. The structure of the fifth embodiment is similar to that of the prior art. The difference is that the fifth embodiment is provided with the conductive portion 2 on the lower inner wall by means of micro-hole introduction, and the one electrode is directly inserted into the lower inner wall. The hole 110 is internally reinforced to enhance the intensity of the asymmetric electric field inside the hole 110. Compared with the technical solution adopted in the prior art 2, it also enhances the electrostatic condensation efficiency and the collection efficiency, and further eliminates the Faraday cage phenomenon.

As shown in FIG. 12, this is the sixth embodiment of the present invention, and the sixth embodiment is further improved on the basis of the first and second embodiments. A fin 41 is disposed on the inner wall of the hole 110, and two fins 42 are disposed on the lower inner wall. The fins 41 disposed on the upper and lower inner walls are made of a conductive material of the conductive portion 2, so that the upper and lower electrodes in the hole 110 simultaneously extend into the hole 110, thereby further enhancing the strength of the asymmetric electric field inside the hole 110. In the sixth embodiment, the three-material co-extrusion method is needed, and the process is more difficult than the other embodiments, but the effect is better.

As shown in FIG. 13, this is the seventh embodiment of the present invention. The seventh embodiment of the present invention differs from the above embodiment in that the hole 110 described in the seventh embodiment has a symmetrical structure of the left and right inner walls and a symmetrical structure of the upper and lower inner walls. That is, no fins are formed on the upper and lower inner walls of the hole 110. However, a conductive material as the conductive portion 2 is still provided on the lower inner wall.

As shown in FIG. 14, this is the eighth embodiment of the present invention, and the eighth embodiment is similar to the above-mentioned seventh embodiment, and is different. In the eighth embodiment, the lower inner wall of the hole 110 is provided with a conductive material as the conductive portion 2 by means of microporous introduction.

In summary, the present invention captures particles passing through the holes by electrostatic condensation, that is, by applying a high voltage to the first electrode and the second electrode and flowing the airflow through the holes, the first electrode charges the particles in the air. Condensation occurs and is adsorbed on the inner wall of the hole 110 by the Coulomb force and the magnetic field force to complete the collection of the particulate matter.

Rather, the above description is only illustrative of the embodiments of the present invention and is not intended to limit the scope of the present invention. Within the scope of the invention patent application.

Claims

The microchannel structure particulate dust collector, the main body (1) of the dust collector is composed of a plurality of layers (10) made of high-resistance electret material, and each layer of the orifice plate (10) is integrally formed with a gas for passage. The array hole (110) is characterized in that: the hole (110) is symmetric with the left and right inner walls, and the upper and lower inner walls are asymmetric, that is, the hole (110) is provided with fins at least on the upper inner wall or the lower inner wall. (4);

The upper inner wall or the lower inner wall of the hole (110) in each layer of the orifice plate (10) is provided with a low-resistance conductive portion (2), and all the conductive portions (2) are electrically connected to constitute the first electrode;

a conductive film (3) is disposed on an outer surface of each of the orifice plates (10) opposite to the other side of the conductive portion (2), and the conductive film (3) constitutes a second electrode;

The first electrode and the second electrode are connected to positive and negative electrodes of a high voltage power source (5) located outside the dust collector body (1) for applying a high voltage electric field.
The microchannel structure particulate dust collector according to claim 1, characterized in that the multi-layer orifice plate (10) in the main body (1) of the dust collector is superposed in such a manner that the orifice plate (10) adopts the same pole. The connected manner is the same as the electrodes disposed on the adjacent sides of the two adjacent orifice plates (10).
The microchannel structure particulate dust collector according to claim 1, wherein when the fin (4) is disposed on an inner wall adjacent to a side of the first electrode, the fin (4) and the conductive portion ( 2) integrally formed; when the fin (4) is disposed on an inner wall adjacent to the side of the second electrode, the fin (4) is integrally formed with the hole (110).
The microchannel structure particulate dust collector according to claim 1, wherein the hole (110) is provided with fins (4) on the upper inner wall and the lower inner wall, and all the fins (4) and the holes (110) One-piece molding.
The microchannel structured particulate dust collector according to any one of claims 1 to 4, characterized in that the conductive portions (2) in the respective orifice plates (10) of the first electrode pass through the conductive mesh (7). )connection.
The microchannel structure particulate dust collector according to claim 1, wherein the orifice plate (10) is injection molded by using a material having a residence polarity property, and the material of the orifice plate (10) is: a high-resistance material and a mixture of electret materials;

The conductive portion (2) is made of a mixture of a low-resistance material and a conductive material;

The conductive film (3) is composed of graphite, carbon black, rare earth permanent magnet material powder, and an adhesive, and is attached to the outer surface of the orifice plate (10) by screen printing.
The microchannel structured particulate dust collector according to claim 6, wherein the orifice plate (10) and the conductive portion (2) are formed by double coextrusion.
The microchannel structure particulate dust collector according to claim 6, wherein the hole (110) is provided with fins (4) on the upper inner wall and the lower inner wall, and all the fins (4) and the holes (110) integrally formed; wherein The conductive portion (2) is disposed in the upper inner wall or the lower inner wall by microporous introduction.
The dust collecting method of the microchannel structure particulate dust collector is characterized in that: the main body (1) of the dust collector is a hole (110) having an array distribution, and the upper inner wall or the lower inner wall of the hole (110) is provided with a conductive portion (2) made of a conductive material, the hole (110) is provided with a conductive film (3) on the outer surface of the other side of the conductive portion (2);

Electrically connecting all the holes (1) of the holes (110) to form a first electrode; the conductive film (3) as a second electrode;

The method adopts an electrostatic condensation method to capture particles passing through the hole, that is, when a high voltage is applied to the first electrode and the second electrode and the airflow flows through the hole, the first electrode charges the particles in the air to coagulate and Under the action of Coulomb force and magnetic field force, it is adsorbed on the inner wall of the hole (110) to complete the collection of particles.
The method for manufacturing a microchannel structure particulate dust collector is characterized in that the manufacturing method comprises the following steps:

First, an orifice plate (10) is produced, the orifice plate (10) being injection molded using a material having electret properties, and the orifice plate (10) is made of a mixture of a high-resistance material and an electret material; The conductive portion (2) is made of a mixture of a low-resistance material and a conductive material; the material having the electret property of the orifice plate (10) and the material for fabricating the conductive portion (2) are passed through an injection molding apparatus, and a double-material co-extrusion is used. By co-extrusion of a two-material synthetic molding die (63); the orifice plate (10) has an array of holes (110) through which gas passes through the co-extrusion of the two materials, the holes (110) being at least in the upper inner wall or The lower inner wall is provided with fins (4), and the conductive portion (2) is formed on the upper inner wall or the lower inner wall of the hole (110); secondly, the orifice plate (10) emerging from the double-material synthetic molding die (63) is corona After being magnetized, it is cut into corresponding lengths by a cutting device (60);

Then, the orifice plate (10) prepared above is superposed, and before the superposition, the conductive film (3) needs to be disposed on the surface of the corresponding orifice plate (10) by printing. When superimposing, the orifice plate (10) is used in the same manner. The pole-connected manner is the same as the electrodes disposed on the adjacent sides of the two adjacent orifice plates (10), and the conductive portions (2) in the orifice plates (10) of the first electrode pass through the conductive mesh (7). )connection;

Finally, all the conductive portions (2) are electrically connected as a first electrode, and all the conductive films (3) are connected as a second electrode to the positive and negative electrodes of the high voltage power source (5) for applying a high voltage electric field.