CN214552229U

CN214552229U - Filter material polarization module for air filtering device and air filtering device

Info

Publication number: CN214552229U
Application number: CN202120294705.4U
Authority: CN
Inventors: 高轶伦; 莫金汉; 田恩泽
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-11-02
Anticipated expiration: 2031-02-02

Abstract

The application provides a filter media polarization module and air filter device for air filter device. The filter polarization module comprises a filter screen (4) and is capable of polarizing the filter screen (4), the gas containing particles being capable of passing through the filter screen (4) such that the particles are at least partially retained in the filter screen (4). The filter material polarization module comprises a high-voltage direct-current power supply (1), a first electrode plate (2) and a second electrode plate (3), and the filter screen (4) is located between the first electrode plate (2) and the second electrode plate (3). The first electrode plate (2) and the second electrode plate (3) are connected with the high-voltage direct-current power supply (1) to form an electric field, so that the filter screen (4) is polarized. The first electrode plate (2) and one surface of only one electrode plate in the second electrode plate (3) facing the filter screen (4) are provided with insulating layers (5).

Description

Filter material polarization module for air filtering device and air filtering device

Technical Field

The application belongs to the technical field of indoor air purification, and particularly relates to a filter material polarization module for an air filtering device and the air filtering device.

Background

The rapid development of the Chinese economic society brings serious burden to the environment. Such as outdoor atmospheric particulate pollution, is very severe.

The particles outside the room can enter the room through natural ventilation or mechanical ventilation systems. In modern society, the time of people staying, working and living indoors can occupy more than 80% of the whole life time, and the exposure amount of the indoor people to particulate matters is considerable. A large number of studies have shown that particulate matter has a serious impact on human health. Clinical symptoms caused by exposure of particulate matter include allergic rhinitis and respiratory inflammation induced by plant pollen, cancer caused by heavy metal salts, oxides, polycyclic aromatic hydrocarbons and the like, pulmonary fibrosis caused by pulmonary deposition, infection of particulate-carried microorganisms and the like. Therefore, the significance of finding an effective indoor particulate matter purification control technology and creating a clean and healthy indoor environment to human health is self-evident.

Common particulate purification techniques include mechanical filtration, electrostatic precipitation, plasma purification, and the like. The mechanical filtering technology device is simple and high in efficiency, and is widely applied to building air conditioning systems. The mechanical filtering technology using the high-efficiency filter as an element has high efficiency and mature production and manufacture, can be modularly integrated into a centralized processing type air conditioning device, and has very wide application. However, the application of high efficiency filters has inherent disadvantages such as short lifetime, high replacement cost, and large filtration resistance. In addition, the electrostatic precipitator has the disadvantages of easy generation of a large amount of ozone, large volume, small dust holding capacity and the like.

In order to achieve low resistance and high efficiency, some purification methods combining filtration and static electricity, such as corona pre-charge-static enhanced filtration technology, have been discovered in research. The main body of the purification device consists of a particulate matter charging module and a filter material polarization module. The particle charging module charges particles in the air flow by using electrostatic discharge. The filter material polarization module enables the polar filter material to generate positive and negative electric separation by adding high-voltage electric fields at the overflowing two ends of the filter material (filter material), so that the filtering effect on charged particles is strengthened. The technology keeps the high efficiency characteristic of mechanical fiber filtration, and is an effective particulate matter purification method.

Application publication No. is CN 107115727A's an air filter based on coarse filter screen ' patent, uses the particulate matter between foraminiferous metal sheet and the metal discharge wire to charge in advance the electric part and the coarse filter screen polarization part between metal discharge wire and the metal mesh, has carried out filtration efficiency's reinforcing to the coarse filter screen of individual layer, has simple structure, the advantage that the resistance is low. However, the patent has the following disadvantages: the polarized electric field generated by the metal net is weaker than that of the metal polar plate, and theoretically, higher polarized voltage or closer polarized distance is needed to reach the polarized field intensity level formed by the metal polar plate. However, once the polarization voltage is increased or the polarization distance is shortened, air breakdown discharge may be caused, which brings use risks such as power supply short circuit and electric spark occurrence, causes coking and even burning of the surface of the fabric filter material, and brings potential safety hazards.

The electrostatic dust removal module described in patent publication No. CN107649290A uses a method of attaching a dust collecting plate to an insulating film, thereby avoiding breakdown between polar plates with high polarization field intensity and improving the particulate filtering efficiency of the module. However, the device is still essentially an electrostatic precipitator, and the particles are directly collected by the metal plate, which still has the disadvantages of the electrostatic precipitator: the structure is complex, ozone is easy to generate, and the long-term use efficiency is reduced quickly.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a filter material polarization module for an air filtering device and an air filtering device, which solve or improve at least one of the above technical problems.

The present application provides a filter polarization module for an air filtration device, the filter polarization module comprising a filter screen and being capable of polarizing the filter screen, gas containing particulate matter being capable of passing through the filter screen such that the particulate matter is at least partially retained in the filter screen,

the filter material polarization module comprises a high-voltage direct-current power supply, a first electrode plate and a second electrode plate,

the filter screen is positioned between the first electrode plate and the second electrode plate,

the first electrode plate and the second electrode plate are connected with the high-voltage direct current power supply to form an electric field so that the filter screen is polarized,

and one surface of only one electrode plate in the first electrode plate and the second electrode plate, which faces the filter screen, is provided with an insulating layer.

In at least one embodiment, the first electrode plate is connected to the positive electrode of the high voltage direct current power supply, and the second electrode plate is grounded or connected to the negative electrode of the high voltage direct current power supply; or

The first electrode plate is grounded or connected with the negative electrode of the high-voltage direct current power supply, and the second electrode plate is connected with the positive electrode of the high-voltage direct current power supply.

In at least one embodiment, the first electrode plate and/or the second electrode plate has a plurality of electrode plate holes through which the gas containing particulate matter can flow to the screen.

In at least one embodiment, the electrode plate hole is a circular hole, and the edge of the opening of the electrode plate hole is provided with a chamfer.

In at least one embodiment, the insulating layer has an insulating layer hole at a corresponding position of the electrode plate hole, and the area of the insulating layer hole is smaller than the area of the electrode plate hole.

In at least one embodiment, the material of the insulating layer includes at least one of polyethylene, polyvinyl chloride, or polyethylene terephthalate.

In at least one embodiment, the screen is a coarse low drag screen as follows: under the condition that the head-on wind speed is 1m/s, the pressure drop generated by the filter screen is less than 25Pa,

the material of the filter screen comprises polyurethane foam material or polyethylene terephthalate fiber.

In at least one embodiment, the filter material polarization module includes an insulating housing and a fixing portion, the fixing portion is fixed on the insulating housing, and the filter screen is detachably mounted on the fixing portion so as to be capable of replacing the filter screen.

In at least one embodiment, the positive electrode of the high voltage direct current power supply is connected with the first electrode plate, the second electrode plate is grounded, and the second electrode plate and the filter screen are closely contacted with each other and are jointly detachably mounted on the fixing portion.

The application provides an air filter device, which comprises a particulate matter charging module for adding charges to particulate matters in air and a filter material polarization module for polarizing filter materials and filtering the air containing the particulate matters,

the filtering material polarization module is the filtering material polarization module,

the distance between the particle charging module and the filter material polarization module is not more than 200 mm.

The application is to the inboard insulating layer that coats of one of them plate electrode of filter media polarization module, does not coat the insulating layer to another plate electrode inboard. Compare in utilizing wire polarization filter media, this application utilizes plate electrode polarization filter media, has reduced potential safety hazards such as the pointed end discharge that wire, the metal mesh scheme that prior art mentioned may produce. The insulating layer is used for blocking discharge, so that the phenomenon of breakdown when the distance between the electrode plate and the filter material (filter screen) is too close is prevented to a certain extent. The highest withstand voltage of the filter polarization module is improved at least because of the existence of the insulating layer. Can therefore suitably reduce between the polar plate, the distance between polar plate and the filter media promotes the polarization voltage between the polar plate, produces stronger polarization to the filter media, promotes the filtration efficiency of lotus electric particle thing.

Meanwhile, the air filtering device uses the filtering material polarization module to enhance the filtering capacity of the filtering material to charged particles, the discharge voltage of the particle charging module (electrostatic discharge device) positioned at the front end of the filtering material polarization module can be correspondingly reduced, and besides the generation of ozone caused by point discharge, the potential safety hazard of coking and even burning of the filtering material during long-term use can be avoided.

Drawings

Fig. 1 shows a schematic structural diagram of a filter polarization module according to an embodiment of the present application.

Fig. 2 shows a schematic structural view of the outer side of the first electrode plate according to an embodiment of the present application.

Fig. 3 shows a schematic structural view of the inner side surface of the first electrode plate according to an embodiment of the present application.

Fig. 4 shows a schematic perspective view of a first electrode plate according to an embodiment of the present application.

Description of the reference numerals

1, a high-voltage direct-current power supply; 2 a first electrode plate; 3 a second electrode plate; 4, filtering by using a filter screen; 5 an insulating layer; 6 an insulating housing; 7a fixing part; 8, pole plate holes; 9 insulating layer holes;

a. b gas flow direction.

Detailed Description

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that the detailed description is only intended to teach one skilled in the art how to practice the present application, and is not intended to be exhaustive or to limit the scope of the application.

For convenience of description, the introduction of a and b in the present application indicates the gas flow direction, the gas flows from a to b, and a and b do not represent specific positions.

The application is based on the particulate matter charge-filter material polarization filtering technology, the particulate matter charge module (not shown) enables the particulate matter in the upstream gas to be charged, the filter material polarization module enables the downstream filter screen 4 (introduced later) to be polarized and induced, the separation of positive and negative electricity inside the material is generated, and the gas containing charged particulate matter can pass through the filter screen 4 to enable the particulate matter to be at least partially left in the filter screen 4 due to electrostatic attraction.

The application provides a filter media polarization module and air filter device for air filter device. As shown in fig. 1, the filter polarization module may include a high voltage dc power supply 1, a first electrode plate 2, a second electrode plate 3, a filter screen 4, an insulating layer 5, an insulating housing 6, and a fixing portion 7. The air filter device provided by the application comprises a particulate matter charging module (not shown) and the filter material polarization module.

The first electrode plate 2 can be connected with the positive pole of the high-voltage direct current power supply 1, and the second electrode plate 3 is grounded or connected with the negative pole of the high-voltage direct current power supply 1. Or the first electrode plate 2 is grounded or connected with the negative electrode of the high-voltage direct current power supply 1, and the second electrode plate 3 is connected with the positive electrode of the high-voltage direct current power supply 1. The screen 4 may be located between the first electrode plate 2 and the second electrode plate 3, which form an electric field by being connected to the high voltage dc power supply 1, causing the screen 4 to be polarized.

Compared with a polarization electric field formed by a discharge metal wire, the electric field generated by the electrode plate is more uniform, and the polarization effect of the filter material is better. And the electrode plate can reduce or avoid potential safety hazards of point discharge especially caused by discharge wires. The electrode plate can be made of stainless steel plate, copper plate or aluminum plate with smooth surface. The outer edges of the electrode plates may be chamfered to prevent tip discharge. The thickness of the electrode plate may be not more than 2mm and not less than 0.5 mm.

The filter screen 4 can be a coarse filter screen with low resistance. For example, the low resistance in the present application means that the pressure drop of the screen 4 is less than 25Pa when the windward speed is 1 m/s. The screen 4 may be a single layer, with a thickness less than or equal to 15 mm. Preferably, the material of the screen 4 may include, but is not limited to, Polyurethane (PU) foam or polyethylene terephthalate (PET) fiber, etc. insulation material. The screen 4 may take a variety of forms, for example, having a border or frame structure to enable the screen 4 to be formed. It will be appreciated that lower filtration resistance may result in energy savings.

Only one of the first electrode plate 2 and the second electrode plate 3 may be provided with an insulating layer 5 on a surface (inner surface) facing the screen 4. The insulating layer 5 improves the highest withstand voltage of the filter material polarization module, reduces ozone generation caused by point discharge, and can reduce or avoid potential safety hazards of filter material coking and even combustion caused by long-term use. It can be understood that if the insulating layer is provided on the surface of the two electrode plates facing the inner side of the filter screen, the polarization electric field may be weakened, and the filtering efficiency may be affected.

That is, it is a more preferable embodiment to provide the insulating layer 5 only on one surface of the first electrode plate 2 and the second electrode plate 3 connected to the positive electrode of the power supply, which surface faces the screen 4. For example, when the first electrode plate 2 is connected to the positive electrode of the power supply 1 and the second electrode plate 3 is grounded, the insulating layer 5 is provided on the surface of the first electrode plate 2 facing the screen 4.

It can be understood that the electrostatic dust collection module mentioned in the prior art is that the particles are directly collected by the metal plate, and the electric field between plates after film covering is improved due to the increase of the voltage between the plates, which is beneficial to improving the efficiency of particle deposition on the plates. In the application, the polarization electric field of the electrode plate is utilized to enable the filter material to generate an induction electric field, and the particles are filtered on the filter fibers instead of the metal plate (the electrode plate) due to the electrostatic force, so that the effect of the induction electric field of the filter material is not the effect of the electric field between the plates. The induced electric field of the filter medium after the insulating layer 5 is provided increases as the inter-plate (polarization) electric field increases, thereby improving the efficiency.

The material of the insulating layer 5 may be polyethylene, polyvinyl chloride, polyethylene terephthalate, or the like. The thickness of the insulating layer 5 may be not more than 200 μm and not less than 30 μm. Preferably, the thickness of the insulating layer 5 is 60 μm. The method of providing the insulating layer 5 may be film rolling, gluing, thermal deposition, or the like.

Due to the increase of the highest withstand voltage, in order to increase the intensity of the polarization electric field, it may be considered to increase the polarization voltage between the electrode plates. Alternatively, the distance between the electrode plates, and the distance between the electrode plates and the filter material can be reduced.

When the voltage between the electrode plates is not changed and the distances between the electrode plates and the filter material are reduced, if the same filtering efficiency as before is achieved, the voltage matched with the particle charging module positioned at the upstream can be reduced, and therefore the generation of ozone is further reduced.

Or, under the condition that the voltage of the particle charging module and the voltage of the filtering material polarization module are maintained unchanged and the ozone generation amount is unchanged, the polarization degree of the filtering material can be improved by reducing the distance between the polar plates and the filtering material, and then the filtering efficiency of the particles is improved.

It can be understood that the high-voltage direct-current power supply is a general device name, and refers to a power supply capable of outputting voltage of kilovolt or more than ten thousand volts, and the direct-current power supply is adopted in the application. In one embodiment, the output voltage of the high voltage dc power supply 1 is adjustable to 0kV to 30kV during use. The first electrode plate 2 is connected with the positive pole of the high-voltage direct-current power supply 1, an insulating layer 5 is arranged on one surface, facing the filter screen 4, of the first electrode plate 2, and the second electrode plate 3 is grounded.

Preferably, the distance between the surface of the first electrode plate 2 facing the filter screen 4 and the surface of the second electrode plate 3 facing the filter screen 4 is not less than 15mm, so as to prevent air from being punctured. Preferably, the distance between the face of the first electrode plate 2 facing the filter screen 4 and the face of the second electrode plate 3 facing the filter screen 4 is not more than 30mm, so as to ensure a certain polarization field strength.

As shown in fig. 2, 3 and 4, further, the first electrode plate 2 and the second electrode plate 3 may have an electrode plate hole 8, and the gas containing the particulate matter can flow to the filter screen 4 through the electrode plate hole 8 (from a to b). The electrode plate holes 8 can be a plurality of round holes with the diameter of 10mm-20mm, and the edges of the holes can be provided with inverted (round) angles. It can be appreciated that the round hole prevents the tip discharge better than the square hole. The rounded corners prevent tip discharge better than angled, e.g., 45 ° chamfers.

In order to balance the strength of the electrode plate and the passing efficiency of the air to be filtered, the electrode plate holes 8 can be uniformly distributed on the electrode plate, and the area of the opening hole can occupy one third to one half of the area of the electrode plate. The larger the area of the opening, the smaller the area of the metal portion, the poorer the polarization effect, and the weaker the polarization electric field formed. The electrode plate that this application adopted, trompil area accounts for the one third of electrode plate area to half for the metal part area is bigger for the metal mesh ratio, and the polarization electric field of formation is stronger relatively.

It can be understood that the metal mesh in the prior art is generally woven by metal wires, the edge and the surface of the metal mesh are easy to form point discharge, and the area of the metal part is smaller than that of the hole. In addition, the mesh design is not favorable for attaching the insulating layer 5 to protect the polarized electric field. The electrode plate (plate type design) that this application adopted trompil shape is easy to be controlled (for example open the round hole), is convenient for set up insulating layer 5, has still avoided or reduced the easy point discharge phenomenon that produces of metal mesh.

In order to prevent insulating layer 5 from blocking electrode plate holes 8, insulating layer 5 has insulating layer holes 9 at positions corresponding to electrode plate holes 8, and the area of insulating layer holes 9 is smaller than the area of electrode plate holes 8. That is, at electrode plate hole 8, the film of insulating layer 5 extends at least 1-2mm beyond the edge of electrode plate hole 8 to ensure that insulating layer 5 completely covers the electrode plate to block the discharge, but does not completely block electrode plate hole 8 (air passage). Of course, accurate connection of the power supply line to the electrode plates is ensured at the time of wiring.

It will be appreciated that instead of providing the electrode plate apertures 8, the flow of gas to be filtered can be altered, for example by flowing the gas over the electrode plate or obliquely over the electrode plate towards the polarised screen 4, to also act as a filter for the charged particles. The gas flow direction is vertical to the electrode plates, and the gas to be filtered sequentially vertically passes through the first electrode plate 2, the filter screen 4 and the second electrode plate 3, which is a more preferable embodiment. The pose and the gas flow direction of the electrode plate and the filter screen 4 are changed, so that the arrangement mode of gas passing through the filter screen 4 with the induction electric field is within the protection range of the application.

The insulating shell 6 can be an insulating shell made of acrylic plastics, and the thickness can be 3-7 mm, preferably 5 mm. An opening (not shown) can be formed in the insulating shell 6, a door body (not shown) made of insulating materials is arranged on the opening, and a silica gel sealing strip (not shown) is arranged at the joint of the opening and the door body, so that the filter screen and other parts can be conveniently overhauled and replaced.

The fixing portion 7 may be a frame or a clip, and is fixed to the insulating housing 6. The fixing portion 7 may be made of an insulating material such as acrylic plastic. The filter 4 is detachably mounted to the fixing portion 7 to facilitate replacement of the filter 4.

In one embodiment, the second electrode plate 3, which is grounded and is not covered with the insulating layer 5, and the filter screen 4 are closely attached to each other and detachably mounted to the fixing portion 7 together. The second electrode plate 3 without the coating insulating layer 5 is tightly attached to the filter screen 4 and is grounded, so that the charged particles can guide the charges of the particles to the ground through the second electrode plate 3, and the charges are prevented from accumulating to a certain extent. Thereby slowing down the reduction of the filtering efficiency of the filter screen 4 and ensuring that the long-term effect is more stable.

The particle charging module can be selected from an anion generating device, a corona type discharging device, a wire plate type discharging device, a needle plate type discharging device and the like. In order to achieve a better using effect, the particle charging module is located at the upstream of wind, and the filter material polarization module is located at the downstream of the wind. And the distance between the two does not exceed 200 mm. In particular, the distance between the two is the vertical distance between the position of the gas to be filtered leaving the particle charging module and the first electrode plate 2 of the filter material polarization module.

The operation process of the embodiment is as follows: the filter material polarization module is arranged behind the particulate matter charge module selected by a user and is arranged in the air duct. The air filtration mode can be operated by enabling the incoming air to flow in the direction from a to b and then switching on the high-voltage direct-current power supply 1.

The application also provides test experiment parameters of the device, wherein the temperature of the experimental environment dry bulb is 17 ℃, and the relative humidity is 30%.

A gennvolt high-voltage positive-polarity high-voltage dc power supply is used as the high-voltage dc power supply 1. The plate interval between the first electrode plate 2 and the second electrode plate 3 is 20mm, and the output voltage of the high-voltage direct-current power supply 1 is gradually increased after the filter screen 4 is connected. The material of filter screen 4 is polyethylene terephthalate, and thickness is 8 mm. The insulating layer 5 is made of polyethylene terephthalate (PET) and has a thickness of 60 μm, and the opening position on the surface of the insulating layer 5 exceeds the edge of the circular hole of the electrode plate hole 8 by 1 mm.

When the two electrode plates are not coated with the insulating layer 5, the high-voltage direct-current power supply 1 generates breakdown when the output voltage is +8kV, visible electric sparks are generated, the breakdown field intensity is 4kV/cm, and the surface of the filter material has scorching traces; under the condition that other parameters are not changed, the device provided by the application generates breakdown when the output of the high-voltage direct-current power supply 1 is increased to +25kV, and the breakdown field intensity is 12.5 kV/cm.

The filtration performance of the air filtration device of the present application was tested as follows. The particle charging module is a needle plate type discharging device, the discharging voltage is +8kV, and the distance between needle plates is 15 mm. When the two electrode plates of the filter material polarization module are not coated with the insulating layer 5, the high-voltage direct-current power supply 1 generates breakdown when outputting +8kV, the counting and filtering efficiency (hereinafter referred to as filtering efficiency) of the filter material polarization module on particles with the particle size of 0.3-0.5 mu m is 83%, and the net ozone generation amount is about 68ppb (volume concentration).

Under the condition that other parameters are not changed, when the output of the high-voltage direct-current power supply 1 is +8kV, the net ozone generation amount of the air filtering device is greatly reduced to about 32ppb compared with the case that the air filtering device is not coated with the insulating layer 5. The breakdown is generated only when the output of the high-voltage direct-current power supply 1 is increased to +25kV, and the filtering efficiency is increased to 94 percent at the moment. On the other hand, if the breakdown voltage is maintained at +25kV, the discharge apparatus voltage is reduced to +5kV, the filtration efficiency is 84%, and the net ozone generation amount is only 17 ppb. Compared with the condition that the insulating layer 5 is not coated, the ozone generation is greatly reduced under the condition that the filtering efficiency is similar.

The application said filter media polarize the module and can show the breakdown field intensity that improves the polarization device, has improved the safety in utilization, has broken through the restriction that the filter efficiency receives the polarization voltage of the filter module of existing static enhancement (particulate matter is charged-filter media polarize the module) simultaneously. At this time, the voltage of the upstream corresponding pm electric module can be reduced, thereby realizing a device for efficiently removing the pm with low ozone generation and low filtration resistance.

It can be understood that even if no particle charging module attaches charges to particles, only the filter material polarization module provided by the application can also play a role in filtering the particles.

While the foregoing is directed to the preferred embodiment of the present application, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the application.

Claims

1. A filter polarization module for an air filtration device, the filter polarization module comprising a screen through which a gas containing particulate matter can pass such that the particulate matter is at least partially retained in the screen and capable of polarizing the screen,

2. The filtering polarization module of claim 1,

the first electrode plate is connected with the positive electrode of the high-voltage direct current power supply, and the second electrode plate is grounded or connected with the negative electrode of the high-voltage direct current power supply; or

3. The filtering polarization module of claim 1,

the first electrode plate and/or the second electrode plate have a plurality of electrode plate holes through which the gas containing particulate matter can flow to the screen.

4. The filtering polarization module of claim 3,

the electrode plate hole is a round hole, and a chamfer is arranged on the edge of the opening hole of the electrode plate hole.

5. The filtering polarization module of claim 3,

the insulating layer is provided with insulating layer holes at the corresponding positions of the electrode plate holes, and the area of each insulating layer hole is smaller than that of each electrode plate hole.

6. The filtering polarization module of claim 1,

the insulating layer is made of one of polyethylene, polyvinyl chloride or polyethylene terephthalate.

7. The filtering polarization module of claim 1,

the filter screen is as follows thick effect low resistance filter screen: under the condition that the head-on wind speed is 1m/s, the pressure drop generated by the filter screen is less than 25Pa,

8. The filtering polarization module of claim 1,

the filter material polarization module comprises an insulating shell and a fixing part, the fixing part is fixed on the insulating shell, and the filter screen is detachably installed on the fixing part and can be replaced.

9. The filtering polarization module of claim 8,

the positive pole of high voltage direct current power supply with first plate electrode links to each other, second plate electrode ground connection, second plate electrode with the filter screen pastes closely each other and common detachably installs in the fixed part.

10. An air filtering device comprises a particulate charging module for adding charges to particulate matters in air and a filtering material polarization module for polarizing filtering materials and filtering the air containing the particulate matters,

the filter polarization module of any one of claims 1 to 9,